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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-06-22 17:59:09 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-06-22 17:59:09 -0700 |
| commit | d70b3ef54ceaf1c7c92209f5a662a670d04cbed9 (patch) | |
| tree | 0f38109c1cabe9e2df028041c1e30f36c803ec5b /arch | |
| parent | 650ec5a6bd5df4ab0c9ef38d05b94cd82fb99ad8 (diff) | |
| parent | 7ef3d7d58d9dc73ee3d4f8f56d0024c8cca8163f (diff) | |
| download | op-kernel-dev-d70b3ef54ceaf1c7c92209f5a662a670d04cbed9.zip op-kernel-dev-d70b3ef54ceaf1c7c92209f5a662a670d04cbed9.tar.gz | |
Merge branch 'x86-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 core updates from Ingo Molnar:
"There were so many changes in the x86/asm, x86/apic and x86/mm topics
in this cycle that the topical separation of -tip broke down somewhat -
so the result is a more traditional architecture pull request,
collected into the 'x86/core' topic.
The topics were still maintained separately as far as possible, so
bisectability and conceptual separation should still be pretty good -
but there were a handful of merge points to avoid excessive
dependencies (and conflicts) that would have been poorly tested in the
end.
The next cycle will hopefully be much more quiet (or at least will
have fewer dependencies).
The main changes in this cycle were:
* x86/apic changes, with related IRQ core changes: (Jiang Liu, Thomas
Gleixner)
- This is the second and most intrusive part of changes to the x86
interrupt handling - full conversion to hierarchical interrupt
domains:
[IOAPIC domain] -----
|
[MSI domain] --------[Remapping domain] ----- [ Vector domain ]
| (optional) |
[HPET MSI domain] ----- |
|
[DMAR domain] -----------------------------
|
[Legacy domain] -----------------------------
This now reflects the actual hardware and allowed us to distangle
the domain specific code from the underlying parent domain, which
can be optional in the case of interrupt remapping. It's a clear
separation of functionality and removes quite some duct tape
constructs which plugged the remap code between ioapic/msi/hpet
and the vector management.
- Intel IOMMU IRQ remapping enhancements, to allow direct interrupt
injection into guests (Feng Wu)
* x86/asm changes:
- Tons of cleanups and small speedups, micro-optimizations. This
is in preparation to move a good chunk of the low level entry
code from assembly to C code (Denys Vlasenko, Andy Lutomirski,
Brian Gerst)
- Moved all system entry related code to a new home under
arch/x86/entry/ (Ingo Molnar)
- Removal of the fragile and ugly CFI dwarf debuginfo annotations.
Conversion to C will reintroduce many of them - but meanwhile
they are only getting in the way, and the upstream kernel does
not rely on them (Ingo Molnar)
- NOP handling refinements. (Borislav Petkov)
* x86/mm changes:
- Big PAT and MTRR rework: making the code more robust and
preparing to phase out exposing direct MTRR interfaces to drivers -
in favor of using PAT driven interfaces (Toshi Kani, Luis R
Rodriguez, Borislav Petkov)
- New ioremap_wt()/set_memory_wt() interfaces to support
Write-Through cached memory mappings. This is especially
important for good performance on NVDIMM hardware (Toshi Kani)
* x86/ras changes:
- Add support for deferred errors on AMD (Aravind Gopalakrishnan)
This is an important RAS feature which adds hardware support for
poisoned data. That means roughly that the hardware marks data
which it has detected as corrupted but wasn't able to correct, as
poisoned data and raises an APIC interrupt to signal that in the
form of a deferred error. It is the OS's responsibility then to
take proper recovery action and thus prolonge system lifetime as
far as possible.
- Add support for Intel "Local MCE"s: upcoming CPUs will support
CPU-local MCE interrupts, as opposed to the traditional system-
wide broadcasted MCE interrupts (Ashok Raj)
- Misc cleanups (Borislav Petkov)
* x86/platform changes:
- Intel Atom SoC updates
... and lots of other cleanups, fixlets and other changes - see the
shortlog and the Git log for details"
* 'x86-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (222 commits)
x86/hpet: Use proper hpet device number for MSI allocation
x86/hpet: Check for irq==0 when allocating hpet MSI interrupts
x86/mm/pat, drivers/infiniband/ipath: Use arch_phys_wc_add() and require PAT disabled
x86/mm/pat, drivers/media/ivtv: Use arch_phys_wc_add() and require PAT disabled
x86/platform/intel/baytrail: Add comments about why we disabled HPET on Baytrail
genirq: Prevent crash in irq_move_irq()
genirq: Enhance irq_data_to_desc() to support hierarchy irqdomain
iommu, x86: Properly handle posted interrupts for IOMMU hotplug
iommu, x86: Provide irq_remapping_cap() interface
iommu, x86: Setup Posted-Interrupts capability for Intel iommu
iommu, x86: Add cap_pi_support() to detect VT-d PI capability
iommu, x86: Avoid migrating VT-d posted interrupts
iommu, x86: Save the mode (posted or remapped) of an IRTE
iommu, x86: Implement irq_set_vcpu_affinity for intel_ir_chip
iommu: dmar: Provide helper to copy shared irte fields
iommu: dmar: Extend struct irte for VT-d Posted-Interrupts
iommu: Add new member capability to struct irq_remap_ops
x86/asm/entry/64: Disentangle error_entry/exit gsbase/ebx/usermode code
x86/asm/entry/32: Shorten __audit_syscall_entry() args preparation
x86/asm/entry/32: Explain reloading of registers after __audit_syscall_entry()
...
Diffstat (limited to 'arch')
198 files changed, 5783 insertions, 5710 deletions
diff --git a/arch/arc/include/asm/io.h b/arch/arc/include/asm/io.h index cabd518..7cc4ced 100644 --- a/arch/arc/include/asm/io.h +++ b/arch/arc/include/asm/io.h @@ -20,6 +20,7 @@ extern void iounmap(const void __iomem *addr); #define ioremap_nocache(phy, sz) ioremap(phy, sz) #define ioremap_wc(phy, sz) ioremap(phy, sz) +#define ioremap_wt(phy, sz) ioremap(phy, sz) /* Change struct page to physical address */ #define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) diff --git a/arch/arm/include/asm/io.h b/arch/arm/include/asm/io.h index db58deb..1b7677d 100644 --- a/arch/arm/include/asm/io.h +++ b/arch/arm/include/asm/io.h @@ -336,6 +336,7 @@ extern void _memset_io(volatile void __iomem *, int, size_t); #define ioremap_nocache(cookie,size) __arm_ioremap((cookie), (size), MT_DEVICE) #define ioremap_cache(cookie,size) __arm_ioremap((cookie), (size), MT_DEVICE_CACHED) #define ioremap_wc(cookie,size) __arm_ioremap((cookie), (size), MT_DEVICE_WC) +#define ioremap_wt(cookie,size) __arm_ioremap((cookie), (size), MT_DEVICE) #define iounmap __arm_iounmap /* diff --git a/arch/arm64/include/asm/io.h b/arch/arm64/include/asm/io.h index 540f7c0..7116d39 100644 --- a/arch/arm64/include/asm/io.h +++ b/arch/arm64/include/asm/io.h @@ -170,6 +170,7 @@ extern void __iomem *ioremap_cache(phys_addr_t phys_addr, size_t size); #define ioremap(addr, size) __ioremap((addr), (size), __pgprot(PROT_DEVICE_nGnRE)) #define ioremap_nocache(addr, size) __ioremap((addr), (size), __pgprot(PROT_DEVICE_nGnRE)) #define ioremap_wc(addr, size) __ioremap((addr), (size), __pgprot(PROT_NORMAL_NC)) +#define ioremap_wt(addr, size) __ioremap((addr), (size), __pgprot(PROT_DEVICE_nGnRE)) #define iounmap __iounmap /* diff --git a/arch/avr32/include/asm/io.h b/arch/avr32/include/asm/io.h index 4f5ec2b..e998ff5 100644 --- a/arch/avr32/include/asm/io.h +++ b/arch/avr32/include/asm/io.h @@ -296,6 +296,7 @@ extern void __iounmap(void __iomem *addr); __iounmap(addr) #define ioremap_wc ioremap_nocache +#define ioremap_wt ioremap_nocache #define cached(addr) P1SEGADDR(addr) #define uncached(addr) P2SEGADDR(addr) diff --git a/arch/frv/include/asm/io.h b/arch/frv/include/asm/io.h index 0b78bc8..a31b63e 100644 --- a/arch/frv/include/asm/io.h +++ b/arch/frv/include/asm/io.h @@ -17,6 +17,8 @@ #ifdef __KERNEL__ +#define ARCH_HAS_IOREMAP_WT + #include <linux/types.h> #include <asm/virtconvert.h> #include <asm/string.h> @@ -265,7 +267,7 @@ static inline void __iomem *ioremap_nocache(unsigned long physaddr, unsigned lon return __ioremap(physaddr, size, IOMAP_NOCACHE_SER); } -static inline void __iomem *ioremap_writethrough(unsigned long physaddr, unsigned long size) +static inline void __iomem *ioremap_wt(unsigned long physaddr, unsigned long size) { return __ioremap(physaddr, size, IOMAP_WRITETHROUGH); } diff --git a/arch/ia64/include/asm/irq_remapping.h b/arch/ia64/include/asm/irq_remapping.h index e3b3556..a8687b1 100644 --- a/arch/ia64/include/asm/irq_remapping.h +++ b/arch/ia64/include/asm/irq_remapping.h @@ -1,6 +1,4 @@ #ifndef __IA64_INTR_REMAPPING_H #define __IA64_INTR_REMAPPING_H #define irq_remapping_enabled 0 -#define dmar_alloc_hwirq create_irq -#define dmar_free_hwirq destroy_irq #endif diff --git a/arch/ia64/kernel/msi_ia64.c b/arch/ia64/kernel/msi_ia64.c index 9dd7464..d70bf15 100644 --- a/arch/ia64/kernel/msi_ia64.c +++ b/arch/ia64/kernel/msi_ia64.c @@ -165,7 +165,7 @@ static struct irq_chip dmar_msi_type = { .irq_retrigger = ia64_msi_retrigger_irq, }; -static int +static void msi_compose_msg(struct pci_dev *pdev, unsigned int irq, struct msi_msg *msg) { struct irq_cfg *cfg = irq_cfg + irq; @@ -186,21 +186,29 @@ msi_compose_msg(struct pci_dev *pdev, unsigned int irq, struct msi_msg *msg) MSI_DATA_LEVEL_ASSERT | MSI_DATA_DELIVERY_FIXED | MSI_DATA_VECTOR(cfg->vector); - return 0; } -int arch_setup_dmar_msi(unsigned int irq) +int dmar_alloc_hwirq(int id, int node, void *arg) { - int ret; + int irq; struct msi_msg msg; - ret = msi_compose_msg(NULL, irq, &msg); - if (ret < 0) - return ret; - dmar_msi_write(irq, &msg); - irq_set_chip_and_handler_name(irq, &dmar_msi_type, handle_edge_irq, - "edge"); - return 0; + irq = create_irq(); + if (irq > 0) { + irq_set_handler_data(irq, arg); + irq_set_chip_and_handler_name(irq, &dmar_msi_type, + handle_edge_irq, "edge"); + msi_compose_msg(NULL, irq, &msg); + dmar_msi_write(irq, &msg); + } + + return irq; +} + +void dmar_free_hwirq(int irq) +{ + irq_set_handler_data(irq, NULL); + destroy_irq(irq); } #endif /* CONFIG_INTEL_IOMMU */ diff --git a/arch/m32r/include/asm/io.h b/arch/m32r/include/asm/io.h index 9cc00db..0c3f25e 100644 --- a/arch/m32r/include/asm/io.h +++ b/arch/m32r/include/asm/io.h @@ -68,6 +68,7 @@ static inline void __iomem *ioremap(unsigned long offset, unsigned long size) extern void iounmap(volatile void __iomem *addr); #define ioremap_nocache(off,size) ioremap(off,size) #define ioremap_wc ioremap_nocache +#define ioremap_wt ioremap_nocache /* * IO bus memory addresses are also 1:1 with the physical address diff --git a/arch/m68k/include/asm/io_mm.h b/arch/m68k/include/asm/io_mm.h index 8955b40..618c85d3 100644 --- a/arch/m68k/include/asm/io_mm.h +++ b/arch/m68k/include/asm/io_mm.h @@ -20,6 +20,8 @@ #ifdef __KERNEL__ +#define ARCH_HAS_IOREMAP_WT + #include <linux/compiler.h> #include <asm/raw_io.h> #include <asm/virtconvert.h> @@ -465,7 +467,7 @@ static inline void __iomem *ioremap_nocache(unsigned long physaddr, unsigned lon { return __ioremap(physaddr, size, IOMAP_NOCACHE_SER); } -static inline void __iomem *ioremap_writethrough(unsigned long physaddr, +static inline void __iomem *ioremap_wt(unsigned long physaddr, unsigned long size) { return __ioremap(physaddr, size, IOMAP_WRITETHROUGH); diff --git a/arch/m68k/include/asm/io_no.h b/arch/m68k/include/asm/io_no.h index a93c8cd..ad7bd40 100644 --- a/arch/m68k/include/asm/io_no.h +++ b/arch/m68k/include/asm/io_no.h @@ -3,6 +3,8 @@ #ifdef __KERNEL__ +#define ARCH_HAS_IOREMAP_WT + #include <asm/virtconvert.h> #include <asm-generic/iomap.h> @@ -153,7 +155,7 @@ static inline void *ioremap_nocache(unsigned long physaddr, unsigned long size) { return __ioremap(physaddr, size, IOMAP_NOCACHE_SER); } -static inline void *ioremap_writethrough(unsigned long physaddr, unsigned long size) +static inline void *ioremap_wt(unsigned long physaddr, unsigned long size) { return __ioremap(physaddr, size, IOMAP_WRITETHROUGH); } diff --git a/arch/metag/include/asm/io.h b/arch/metag/include/asm/io.h index d5779b0..9890f21 100644 --- a/arch/metag/include/asm/io.h +++ b/arch/metag/include/asm/io.h @@ -160,6 +160,9 @@ extern void __iounmap(void __iomem *addr); #define ioremap_wc(offset, size) \ __ioremap((offset), (size), _PAGE_WR_COMBINE) +#define ioremap_wt(offset, size) \ + __ioremap((offset), (size), 0) + #define iounmap(addr) \ __iounmap(addr) diff --git a/arch/microblaze/include/asm/io.h b/arch/microblaze/include/asm/io.h index 940f5fc..39b6315 100644 --- a/arch/microblaze/include/asm/io.h +++ b/arch/microblaze/include/asm/io.h @@ -39,10 +39,10 @@ extern resource_size_t isa_mem_base; extern void iounmap(void __iomem *addr); extern void __iomem *ioremap(phys_addr_t address, unsigned long size); -#define ioremap_writethrough(addr, size) ioremap((addr), (size)) #define ioremap_nocache(addr, size) ioremap((addr), (size)) #define ioremap_fullcache(addr, size) ioremap((addr), (size)) #define ioremap_wc(addr, size) ioremap((addr), (size)) +#define ioremap_wt(addr, size) ioremap((addr), (size)) #endif /* CONFIG_MMU */ diff --git a/arch/mn10300/include/asm/io.h b/arch/mn10300/include/asm/io.h index cc4a2ba..07c5b4a 100644 --- a/arch/mn10300/include/asm/io.h +++ b/arch/mn10300/include/asm/io.h @@ -282,6 +282,7 @@ static inline void __iomem *ioremap_nocache(unsigned long offset, unsigned long } #define ioremap_wc ioremap_nocache +#define ioremap_wt ioremap_nocache static inline void iounmap(void __iomem *addr) { diff --git a/arch/nios2/include/asm/io.h b/arch/nios2/include/asm/io.h index 6e24d7c..c5a62da 100644 --- a/arch/nios2/include/asm/io.h +++ b/arch/nios2/include/asm/io.h @@ -46,6 +46,7 @@ static inline void iounmap(void __iomem *addr) } #define ioremap_wc ioremap_nocache +#define ioremap_wt ioremap_nocache /* Pages to physical address... */ #define page_to_phys(page) virt_to_phys(page_to_virt(page)) diff --git a/arch/s390/include/asm/io.h b/arch/s390/include/asm/io.h index 30fd5c8..cb5fdf3 100644 --- a/arch/s390/include/asm/io.h +++ b/arch/s390/include/asm/io.h @@ -29,6 +29,7 @@ void unxlate_dev_mem_ptr(phys_addr_t phys, void *addr); #define ioremap_nocache(addr, size) ioremap(addr, size) #define ioremap_wc ioremap_nocache +#define ioremap_wt ioremap_nocache static inline void __iomem *ioremap(unsigned long offset, unsigned long size) { diff --git a/arch/sparc/include/asm/io_32.h b/arch/sparc/include/asm/io_32.h index 407ac14..57f26c3 100644 --- a/arch/sparc/include/asm/io_32.h +++ b/arch/sparc/include/asm/io_32.h @@ -129,6 +129,7 @@ static inline void sbus_memcpy_toio(volatile void __iomem *dst, void __iomem *ioremap(unsigned long offset, unsigned long size); #define ioremap_nocache(X,Y) ioremap((X),(Y)) #define ioremap_wc(X,Y) ioremap((X),(Y)) +#define ioremap_wt(X,Y) ioremap((X),(Y)) void iounmap(volatile void __iomem *addr); /* Create a virtual mapping cookie for an IO port range */ diff --git a/arch/sparc/include/asm/io_64.h b/arch/sparc/include/asm/io_64.h index 50d4840..c32fa3f 100644 --- a/arch/sparc/include/asm/io_64.h +++ b/arch/sparc/include/asm/io_64.h @@ -402,6 +402,7 @@ static inline void __iomem *ioremap(unsigned long offset, unsigned long size) #define ioremap_nocache(X,Y) ioremap((X),(Y)) #define ioremap_wc(X,Y) ioremap((X),(Y)) +#define ioremap_wt(X,Y) ioremap((X),(Y)) static inline void iounmap(volatile void __iomem *addr) { diff --git a/arch/tile/include/asm/io.h b/arch/tile/include/asm/io.h index 6ef4eca..dc61de1 100644 --- a/arch/tile/include/asm/io.h +++ b/arch/tile/include/asm/io.h @@ -54,7 +54,7 @@ extern void iounmap(volatile void __iomem *addr); #define ioremap_nocache(physaddr, size) ioremap(physaddr, size) #define ioremap_wc(physaddr, size) ioremap(physaddr, size) -#define ioremap_writethrough(physaddr, size) ioremap(physaddr, size) +#define ioremap_wt(physaddr, size) ioremap(physaddr, size) #define ioremap_fullcache(physaddr, size) ioremap(physaddr, size) #define mmiowb() diff --git a/arch/x86/Kbuild b/arch/x86/Kbuild index 3942f74..1538562 100644 --- a/arch/x86/Kbuild +++ b/arch/x86/Kbuild @@ -1,3 +1,6 @@ + +obj-y += entry/ + obj-$(CONFIG_KVM) += kvm/ # Xen paravirtualization support @@ -11,7 +14,7 @@ obj-y += kernel/ obj-y += mm/ obj-y += crypto/ -obj-y += vdso/ + obj-$(CONFIG_IA32_EMULATION) += ia32/ obj-y += platform/ diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 4e986e8..7e39f9b 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -9,141 +9,141 @@ config 64BIT config X86_32 def_bool y depends on !64BIT - select CLKSRC_I8253 - select HAVE_UID16 config X86_64 def_bool y depends on 64BIT - select X86_DEV_DMA_OPS - select ARCH_USE_CMPXCHG_LOCKREF - select HAVE_LIVEPATCH ### Arch settings config X86 def_bool y - select ACPI_SYSTEM_POWER_STATES_SUPPORT if ACPI - select ARCH_MIGHT_HAVE_ACPI_PDC if ACPI + select ACPI_LEGACY_TABLES_LOOKUP if ACPI + select ACPI_SYSTEM_POWER_STATES_SUPPORT if ACPI + select ANON_INODES + select ARCH_CLOCKSOURCE_DATA + select ARCH_DISCARD_MEMBLOCK + select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS + select ARCH_HAS_ELF_RANDOMIZE select ARCH_HAS_FAST_MULTIPLIER select ARCH_HAS_GCOV_PROFILE_ALL + select ARCH_HAS_SG_CHAIN + select ARCH_HAVE_NMI_SAFE_CMPXCHG + select ARCH_MIGHT_HAVE_ACPI_PDC if ACPI select ARCH_MIGHT_HAVE_PC_PARPORT select ARCH_MIGHT_HAVE_PC_SERIO - select HAVE_AOUT if X86_32 - select HAVE_UNSTABLE_SCHED_CLOCK - select ARCH_SUPPORTS_NUMA_BALANCING if X86_64 - select ARCH_SUPPORTS_INT128 if X86_64 - select HAVE_IDE - select HAVE_OPROFILE - select HAVE_PCSPKR_PLATFORM - select HAVE_PERF_EVENTS - select HAVE_IOREMAP_PROT - select HAVE_KPROBES - select HAVE_MEMBLOCK - select HAVE_MEMBLOCK_NODE_MAP - select ARCH_DISCARD_MEMBLOCK - select ARCH_WANT_OPTIONAL_GPIOLIB + select ARCH_SUPPORTS_ATOMIC_RMW + select ARCH_SUPPORTS_INT128 if X86_64 + select ARCH_SUPPORTS_NUMA_BALANCING if X86_64 + select ARCH_USE_BUILTIN_BSWAP + select ARCH_USE_CMPXCHG_LOCKREF if X86_64 + select ARCH_USE_QUEUED_RWLOCKS + select ARCH_USE_QUEUED_SPINLOCKS select ARCH_WANT_FRAME_POINTERS - select HAVE_DMA_ATTRS - select HAVE_DMA_CONTIGUOUS - select HAVE_KRETPROBES + select ARCH_WANT_IPC_PARSE_VERSION if X86_32 + select ARCH_WANT_OPTIONAL_GPIOLIB + select BUILDTIME_EXTABLE_SORT + select CLKEVT_I8253 + select CLKSRC_I8253 if X86_32 + select CLOCKSOURCE_VALIDATE_LAST_CYCLE + select CLOCKSOURCE_WATCHDOG + select CLONE_BACKWARDS if X86_32 + select COMPAT_OLD_SIGACTION if IA32_EMULATION + select DCACHE_WORD_ACCESS + select GENERIC_CLOCKEVENTS + select GENERIC_CLOCKEVENTS_BROADCAST if X86_64 || (X86_32 && X86_LOCAL_APIC) + select GENERIC_CLOCKEVENTS_MIN_ADJUST + select GENERIC_CMOS_UPDATE + select GENERIC_CPU_AUTOPROBE select GENERIC_EARLY_IOREMAP - select HAVE_OPTPROBES - select HAVE_KPROBES_ON_FTRACE - select HAVE_FTRACE_MCOUNT_RECORD - select HAVE_FENTRY if X86_64 + select GENERIC_FIND_FIRST_BIT + select GENERIC_IOMAP + select GENERIC_IRQ_PROBE + select GENERIC_IRQ_SHOW + select GENERIC_PENDING_IRQ if SMP + select GENERIC_SMP_IDLE_THREAD + select GENERIC_STRNCPY_FROM_USER + select GENERIC_STRNLEN_USER + select GENERIC_TIME_VSYSCALL + select HAVE_ACPI_APEI if ACPI + select HAVE_ACPI_APEI_NMI if ACPI + select HAVE_ALIGNED_STRUCT_PAGE if SLUB + select HAVE_AOUT if X86_32 + select HAVE_ARCH_AUDITSYSCALL + select HAVE_ARCH_HUGE_VMAP if X86_64 || X86_PAE + select HAVE_ARCH_JUMP_LABEL + select HAVE_ARCH_KASAN if X86_64 && SPARSEMEM_VMEMMAP + select HAVE_ARCH_KGDB + select HAVE_ARCH_KMEMCHECK + select HAVE_ARCH_SECCOMP_FILTER + select HAVE_ARCH_SOFT_DIRTY if X86_64 + select HAVE_ARCH_TRACEHOOK + select HAVE_ARCH_TRANSPARENT_HUGEPAGE + select HAVE_BPF_JIT if X86_64 + select HAVE_CC_STACKPROTECTOR + select HAVE_CMPXCHG_DOUBLE + select HAVE_CMPXCHG_LOCAL + select HAVE_CONTEXT_TRACKING if X86_64 select HAVE_C_RECORDMCOUNT + select HAVE_DEBUG_KMEMLEAK + select HAVE_DEBUG_STACKOVERFLOW + select HAVE_DMA_API_DEBUG + select HAVE_DMA_ATTRS + select HAVE_DMA_CONTIGUOUS select HAVE_DYNAMIC_FTRACE select HAVE_DYNAMIC_FTRACE_WITH_REGS - select HAVE_FUNCTION_TRACER - select HAVE_FUNCTION_GRAPH_TRACER - select HAVE_FUNCTION_GRAPH_FP_TEST - select HAVE_SYSCALL_TRACEPOINTS - select SYSCTL_EXCEPTION_TRACE - select HAVE_KVM - select HAVE_ARCH_KGDB - select HAVE_ARCH_TRACEHOOK - select HAVE_GENERIC_DMA_COHERENT if X86_32 select HAVE_EFFICIENT_UNALIGNED_ACCESS - select USER_STACKTRACE_SUPPORT - select HAVE_REGS_AND_STACK_ACCESS_API - select HAVE_DMA_API_DEBUG - select HAVE_KERNEL_GZIP + select HAVE_FENTRY if X86_64 + select HAVE_FTRACE_MCOUNT_RECORD + select HAVE_FUNCTION_GRAPH_FP_TEST + select HAVE_FUNCTION_GRAPH_TRACER + select HAVE_FUNCTION_TRACER + select HAVE_GENERIC_DMA_COHERENT if X86_32 + select HAVE_HW_BREAKPOINT + select HAVE_IDE + select HAVE_IOREMAP_PROT + select HAVE_IRQ_EXIT_ON_IRQ_STACK if X86_64 + select HAVE_IRQ_TIME_ACCOUNTING select HAVE_KERNEL_BZIP2 + select HAVE_KERNEL_GZIP + select HAVE_KERNEL_LZ4 select HAVE_KERNEL_LZMA - select HAVE_KERNEL_XZ select HAVE_KERNEL_LZO - select HAVE_KERNEL_LZ4 - select HAVE_HW_BREAKPOINT + select HAVE_KERNEL_XZ + select HAVE_KPROBES + select HAVE_KPROBES_ON_FTRACE + select HAVE_KRETPROBES + select HAVE_KVM + select HAVE_LIVEPATCH if X86_64 + select HAVE_MEMBLOCK + select HAVE_MEMBLOCK_NODE_MAP select HAVE_MIXED_BREAKPOINTS_REGS - select PERF_EVENTS + select HAVE_OPROFILE + select HAVE_OPTPROBES + select HAVE_PCSPKR_PLATFORM + select HAVE_PERF_EVENTS select HAVE_PERF_EVENTS_NMI select HAVE_PERF_REGS select HAVE_PERF_USER_STACK_DUMP - select HAVE_DEBUG_KMEMLEAK - select ANON_INODES - select HAVE_ALIGNED_STRUCT_PAGE if SLUB - select HAVE_CMPXCHG_LOCAL - select HAVE_CMPXCHG_DOUBLE - select HAVE_ARCH_KMEMCHECK - select HAVE_ARCH_KASAN if X86_64 && SPARSEMEM_VMEMMAP + select HAVE_REGS_AND_STACK_ACCESS_API + select HAVE_SYSCALL_TRACEPOINTS + select HAVE_UID16 if X86_32 + select HAVE_UNSTABLE_SCHED_CLOCK select HAVE_USER_RETURN_NOTIFIER - select ARCH_HAS_ELF_RANDOMIZE - select HAVE_ARCH_JUMP_LABEL - select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE - select SPARSE_IRQ - select GENERIC_FIND_FIRST_BIT - select GENERIC_IRQ_PROBE - select GENERIC_PENDING_IRQ if SMP - select GENERIC_IRQ_SHOW - select GENERIC_CLOCKEVENTS_MIN_ADJUST select IRQ_FORCED_THREADING - select HAVE_BPF_JIT if X86_64 - select HAVE_ARCH_TRANSPARENT_HUGEPAGE - select HAVE_ARCH_HUGE_VMAP if X86_64 || (X86_32 && X86_PAE) - select ARCH_HAS_SG_CHAIN - select CLKEVT_I8253 - select ARCH_HAVE_NMI_SAFE_CMPXCHG - select GENERIC_IOMAP - select DCACHE_WORD_ACCESS - select GENERIC_SMP_IDLE_THREAD - select ARCH_WANT_IPC_PARSE_VERSION if X86_32 - select HAVE_ARCH_SECCOMP_FILTER - select BUILDTIME_EXTABLE_SORT - select GENERIC_CMOS_UPDATE - select HAVE_ARCH_SOFT_DIRTY if X86_64 - select CLOCKSOURCE_WATCHDOG - select GENERIC_CLOCKEVENTS - select ARCH_CLOCKSOURCE_DATA - select CLOCKSOURCE_VALIDATE_LAST_CYCLE - select GENERIC_CLOCKEVENTS_BROADCAST if X86_64 || (X86_32 && X86_LOCAL_APIC) - select GENERIC_TIME_VSYSCALL - select GENERIC_STRNCPY_FROM_USER - select GENERIC_STRNLEN_USER - select HAVE_CONTEXT_TRACKING if X86_64 - select HAVE_IRQ_TIME_ACCOUNTING - select VIRT_TO_BUS - select MODULES_USE_ELF_REL if X86_32 - select MODULES_USE_ELF_RELA if X86_64 - select CLONE_BACKWARDS if X86_32 - select ARCH_USE_BUILTIN_BSWAP - select ARCH_USE_QUEUED_SPINLOCKS - select ARCH_USE_QUEUED_RWLOCKS - select OLD_SIGSUSPEND3 if X86_32 || IA32_EMULATION - select OLD_SIGACTION if X86_32 - select COMPAT_OLD_SIGACTION if IA32_EMULATION + select MODULES_USE_ELF_RELA if X86_64 + select MODULES_USE_ELF_REL if X86_32 + select OLD_SIGACTION if X86_32 + select OLD_SIGSUSPEND3 if X86_32 || IA32_EMULATION + select PERF_EVENTS select RTC_LIB - select HAVE_DEBUG_STACKOVERFLOW - select HAVE_IRQ_EXIT_ON_IRQ_STACK if X86_64 - select HAVE_CC_STACKPROTECTOR - select GENERIC_CPU_AUTOPROBE - select HAVE_ARCH_AUDITSYSCALL - select ARCH_SUPPORTS_ATOMIC_RMW - select HAVE_ACPI_APEI if ACPI - select HAVE_ACPI_APEI_NMI if ACPI - select ACPI_LEGACY_TABLES_LOOKUP if ACPI - select X86_FEATURE_NAMES if PROC_FS + select SPARSE_IRQ select SRCU + select SYSCTL_EXCEPTION_TRACE + select USER_STACKTRACE_SUPPORT + select VIRT_TO_BUS + select X86_DEV_DMA_OPS if X86_64 + select X86_FEATURE_NAMES if PROC_FS config INSTRUCTION_DECODER def_bool y @@ -261,10 +261,6 @@ config X86_64_SMP def_bool y depends on X86_64 && SMP -config X86_HT - def_bool y - depends on SMP - config X86_32_LAZY_GS def_bool y depends on X86_32 && !CC_STACKPROTECTOR @@ -342,7 +338,7 @@ config X86_FEATURE_NAMES config X86_X2APIC bool "Support x2apic" - depends on X86_LOCAL_APIC && X86_64 && IRQ_REMAP + depends on X86_LOCAL_APIC && X86_64 && (IRQ_REMAP || HYPERVISOR_GUEST) ---help--- This enables x2apic support on CPUs that have this feature. @@ -442,6 +438,7 @@ config X86_UV depends on X86_EXTENDED_PLATFORM depends on NUMA depends on X86_X2APIC + depends on PCI ---help--- This option is needed in order to support SGI Ultraviolet systems. If you don't have one of these, you should say N here. @@ -467,7 +464,6 @@ config X86_INTEL_CE select X86_REBOOTFIXUPS select OF select OF_EARLY_FLATTREE - select IRQ_DOMAIN ---help--- Select for the Intel CE media processor (CE4100) SOC. This option compiles in support for the CE4100 SOC for settop @@ -852,11 +848,12 @@ config NR_CPUS default "1" if !SMP default "8192" if MAXSMP default "32" if SMP && X86_BIGSMP - default "8" if SMP + default "8" if SMP && X86_32 + default "64" if SMP ---help--- This allows you to specify the maximum number of CPUs which this kernel will support. If CPUMASK_OFFSTACK is enabled, the maximum - supported value is 4096, otherwise the maximum value is 512. The + supported value is 8192, otherwise the maximum value is 512. The minimum value which makes sense is 2. This is purely to save memory - each supported CPU adds @@ -864,7 +861,7 @@ config NR_CPUS config SCHED_SMT bool "SMT (Hyperthreading) scheduler support" - depends on X86_HT + depends on SMP ---help--- SMT scheduler support improves the CPU scheduler's decision making when dealing with Intel Pentium 4 chips with HyperThreading at a @@ -874,7 +871,7 @@ config SCHED_SMT config SCHED_MC def_bool y prompt "Multi-core scheduler support" - depends on X86_HT + depends on SMP ---help--- Multi-core scheduler support improves the CPU scheduler's decision making when dealing with multi-core CPU chips at a cost of slightly @@ -915,12 +912,12 @@ config X86_UP_IOAPIC config X86_LOCAL_APIC def_bool y depends on X86_64 || SMP || X86_32_NON_STANDARD || X86_UP_APIC || PCI_MSI - select GENERIC_IRQ_LEGACY_ALLOC_HWIRQ + select IRQ_DOMAIN_HIERARCHY + select PCI_MSI_IRQ_DOMAIN if PCI_MSI config X86_IO_APIC def_bool y depends on X86_LOCAL_APIC || X86_UP_IOAPIC - select IRQ_DOMAIN config X86_REROUTE_FOR_BROKEN_BOOT_IRQS bool "Reroute for broken boot IRQs" diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug index 2fd3ebb..a15893d 100644 --- a/arch/x86/Kconfig.debug +++ b/arch/x86/Kconfig.debug @@ -344,4 +344,15 @@ config X86_DEBUG_FPU If unsure, say N. +config PUNIT_ATOM_DEBUG + tristate "ATOM Punit debug driver" + select DEBUG_FS + select IOSF_MBI + ---help--- + This is a debug driver, which gets the power states + of all Punit North Complex devices. The power states of + each device is exposed as part of the debugfs interface. + The current power state can be read from + /sys/kernel/debug/punit_atom/dev_power_state + endmenu diff --git a/arch/x86/Makefile b/arch/x86/Makefile index 2fda005..118e6de 100644 --- a/arch/x86/Makefile +++ b/arch/x86/Makefile @@ -77,6 +77,12 @@ else KBUILD_AFLAGS += -m64 KBUILD_CFLAGS += -m64 + # Align jump targets to 1 byte, not the default 16 bytes: + KBUILD_CFLAGS += -falign-jumps=1 + + # Pack loops tightly as well: + KBUILD_CFLAGS += -falign-loops=1 + # Don't autogenerate traditional x87 instructions KBUILD_CFLAGS += $(call cc-option,-mno-80387) KBUILD_CFLAGS += $(call cc-option,-mno-fp-ret-in-387) @@ -84,6 +90,9 @@ else # Use -mpreferred-stack-boundary=3 if supported. KBUILD_CFLAGS += $(call cc-option,-mpreferred-stack-boundary=3) + # Use -mskip-rax-setup if supported. + KBUILD_CFLAGS += $(call cc-option,-mskip-rax-setup) + # FIXME - should be integrated in Makefile.cpu (Makefile_32.cpu) cflags-$(CONFIG_MK8) += $(call cc-option,-march=k8) cflags-$(CONFIG_MPSC) += $(call cc-option,-march=nocona) @@ -140,12 +149,6 @@ endif sp-$(CONFIG_X86_32) := esp sp-$(CONFIG_X86_64) := rsp -# do binutils support CFI? -cfi := $(call as-instr,.cfi_startproc\n.cfi_rel_offset $(sp-y)$(comma)0\n.cfi_endproc,-DCONFIG_AS_CFI=1) -# is .cfi_signal_frame supported too? -cfi-sigframe := $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1) -cfi-sections := $(call as-instr,.cfi_sections .debug_frame,-DCONFIG_AS_CFI_SECTIONS=1) - # does binutils support specific instructions? asinstr := $(call as-instr,fxsaveq (%rax),-DCONFIG_AS_FXSAVEQ=1) asinstr += $(call as-instr,pshufb %xmm0$(comma)%xmm0,-DCONFIG_AS_SSSE3=1) @@ -153,8 +156,8 @@ asinstr += $(call as-instr,crc32l %eax$(comma)%eax,-DCONFIG_AS_CRC32=1) avx_instr := $(call as-instr,vxorps %ymm0$(comma)%ymm1$(comma)%ymm2,-DCONFIG_AS_AVX=1) avx2_instr :=$(call as-instr,vpbroadcastb %xmm0$(comma)%ymm1,-DCONFIG_AS_AVX2=1) -KBUILD_AFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) -KBUILD_CFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) +KBUILD_AFLAGS += $(asinstr) $(avx_instr) $(avx2_instr) +KBUILD_CFLAGS += $(asinstr) $(avx_instr) $(avx2_instr) LDFLAGS := -m elf_$(UTS_MACHINE) @@ -178,7 +181,7 @@ archscripts: scripts_basic # Syscall table generation archheaders: - $(Q)$(MAKE) $(build)=arch/x86/syscalls all + $(Q)$(MAKE) $(build)=arch/x86/entry/syscalls all archprepare: ifeq ($(CONFIG_KEXEC_FILE),y) @@ -241,7 +244,7 @@ install: PHONY += vdso_install vdso_install: - $(Q)$(MAKE) $(build)=arch/x86/vdso $@ + $(Q)$(MAKE) $(build)=arch/x86/entry/vdso $@ archclean: $(Q)rm -rf $(objtree)/arch/i386 diff --git a/arch/x86/entry/Makefile b/arch/x86/entry/Makefile new file mode 100644 index 0000000..7a14497 --- /dev/null +++ b/arch/x86/entry/Makefile @@ -0,0 +1,10 @@ +# +# Makefile for the x86 low level entry code +# +obj-y := entry_$(BITS).o thunk_$(BITS).o syscall_$(BITS).o + +obj-y += vdso/ +obj-y += vsyscall/ + +obj-$(CONFIG_IA32_EMULATION) += entry_64_compat.o syscall_32.o + diff --git a/arch/x86/include/asm/calling.h b/arch/x86/entry/calling.h index 1c8b50e..f4e6308 100644 --- a/arch/x86/include/asm/calling.h +++ b/arch/x86/entry/calling.h @@ -46,8 +46,6 @@ For 32-bit we have the following conventions - kernel is built with */ -#include <asm/dwarf2.h> - #ifdef CONFIG_X86_64 /* @@ -91,28 +89,27 @@ For 32-bit we have the following conventions - kernel is built with #define SIZEOF_PTREGS 21*8 .macro ALLOC_PT_GPREGS_ON_STACK addskip=0 - subq $15*8+\addskip, %rsp - CFI_ADJUST_CFA_OFFSET 15*8+\addskip + addq $-(15*8+\addskip), %rsp .endm .macro SAVE_C_REGS_HELPER offset=0 rax=1 rcx=1 r8910=1 r11=1 .if \r11 - movq_cfi r11, 6*8+\offset + movq %r11, 6*8+\offset(%rsp) .endif .if \r8910 - movq_cfi r10, 7*8+\offset - movq_cfi r9, 8*8+\offset - movq_cfi r8, 9*8+\offset + movq %r10, 7*8+\offset(%rsp) + movq %r9, 8*8+\offset(%rsp) + movq %r8, 9*8+\offset(%rsp) .endif .if \rax - movq_cfi rax, 10*8+\offset + movq %rax, 10*8+\offset(%rsp) .endif .if \rcx - movq_cfi rcx, 11*8+\offset + movq %rcx, 11*8+\offset(%rsp) .endif - movq_cfi rdx, 12*8+\offset - movq_cfi rsi, 13*8+\offset - movq_cfi rdi, 14*8+\offset + movq %rdx, 12*8+\offset(%rsp) + movq %rsi, 13*8+\offset(%rsp) + movq %rdi, 14*8+\offset(%rsp) .endm .macro SAVE_C_REGS offset=0 SAVE_C_REGS_HELPER \offset, 1, 1, 1, 1 @@ -131,24 +128,24 @@ For 32-bit we have the following conventions - kernel is built with .endm .macro SAVE_EXTRA_REGS offset=0 - movq_cfi r15, 0*8+\offset - movq_cfi r14, 1*8+\offset - movq_cfi r13, 2*8+\offset - movq_cfi r12, 3*8+\offset - movq_cfi rbp, 4*8+\offset - movq_cfi rbx, 5*8+\offset + movq %r15, 0*8+\offset(%rsp) + movq %r14, 1*8+\offset(%rsp) + movq %r13, 2*8+\offset(%rsp) + movq %r12, 3*8+\offset(%rsp) + movq %rbp, 4*8+\offset(%rsp) + movq %rbx, 5*8+\offset(%rsp) .endm .macro SAVE_EXTRA_REGS_RBP offset=0 - movq_cfi rbp, 4*8+\offset + movq %rbp, 4*8+\offset(%rsp) .endm .macro RESTORE_EXTRA_REGS offset=0 - movq_cfi_restore 0*8+\offset, r15 - movq_cfi_restore 1*8+\offset, r14 - movq_cfi_restore 2*8+\offset, r13 - movq_cfi_restore 3*8+\offset, r12 - movq_cfi_restore 4*8+\offset, rbp - movq_cfi_restore 5*8+\offset, rbx + movq 0*8+\offset(%rsp), %r15 + movq 1*8+\offset(%rsp), %r14 + movq 2*8+\offset(%rsp), %r13 + movq 3*8+\offset(%rsp), %r12 + movq 4*8+\offset(%rsp), %rbp + movq 5*8+\offset(%rsp), %rbx .endm .macro ZERO_EXTRA_REGS @@ -162,24 +159,24 @@ For 32-bit we have the following conventions - kernel is built with .macro RESTORE_C_REGS_HELPER rstor_rax=1, rstor_rcx=1, rstor_r11=1, rstor_r8910=1, rstor_rdx=1 .if \rstor_r11 - movq_cfi_restore 6*8, r11 + movq 6*8(%rsp), %r11 .endif .if \rstor_r8910 - movq_cfi_restore 7*8, r10 - movq_cfi_restore 8*8, r9 - movq_cfi_restore 9*8, r8 + movq 7*8(%rsp), %r10 + movq 8*8(%rsp), %r9 + movq 9*8(%rsp), %r8 .endif .if \rstor_rax - movq_cfi_restore 10*8, rax + movq 10*8(%rsp), %rax .endif .if \rstor_rcx - movq_cfi_restore 11*8, rcx + movq 11*8(%rsp), %rcx .endif .if \rstor_rdx - movq_cfi_restore 12*8, rdx + movq 12*8(%rsp), %rdx .endif - movq_cfi_restore 13*8, rsi - movq_cfi_restore 14*8, rdi + movq 13*8(%rsp), %rsi + movq 14*8(%rsp), %rdi .endm .macro RESTORE_C_REGS RESTORE_C_REGS_HELPER 1,1,1,1,1 @@ -204,8 +201,7 @@ For 32-bit we have the following conventions - kernel is built with .endm .macro REMOVE_PT_GPREGS_FROM_STACK addskip=0 - addq $15*8+\addskip, %rsp - CFI_ADJUST_CFA_OFFSET -(15*8+\addskip) + subq $-(15*8+\addskip), %rsp .endm .macro icebp @@ -224,23 +220,23 @@ For 32-bit we have the following conventions - kernel is built with */ .macro SAVE_ALL - pushl_cfi_reg eax - pushl_cfi_reg ebp - pushl_cfi_reg edi - pushl_cfi_reg esi - pushl_cfi_reg edx - pushl_cfi_reg ecx - pushl_cfi_reg ebx + pushl %eax + pushl %ebp + pushl %edi + pushl %esi + pushl %edx + pushl %ecx + pushl %ebx .endm .macro RESTORE_ALL - popl_cfi_reg ebx - popl_cfi_reg ecx - popl_cfi_reg edx - popl_cfi_reg esi - popl_cfi_reg edi - popl_cfi_reg ebp - popl_cfi_reg eax + popl %ebx + popl %ecx + popl %edx + popl %esi + popl %edi + popl %ebp + popl %eax .endm #endif /* CONFIG_X86_64 */ diff --git a/arch/x86/entry/entry_32.S b/arch/x86/entry/entry_32.S new file mode 100644 index 0000000..21dc60a --- /dev/null +++ b/arch/x86/entry/entry_32.S @@ -0,0 +1,1248 @@ +/* + * Copyright (C) 1991,1992 Linus Torvalds + * + * entry_32.S contains the system-call and low-level fault and trap handling routines. + * + * Stack layout in 'syscall_exit': + * ptrace needs to have all registers on the stack. + * If the order here is changed, it needs to be + * updated in fork.c:copy_process(), signal.c:do_signal(), + * ptrace.c and ptrace.h + * + * 0(%esp) - %ebx + * 4(%esp) - %ecx + * 8(%esp) - %edx + * C(%esp) - %esi + * 10(%esp) - %edi + * 14(%esp) - %ebp + * 18(%esp) - %eax + * 1C(%esp) - %ds + * 20(%esp) - %es + * 24(%esp) - %fs + * 28(%esp) - %gs saved iff !CONFIG_X86_32_LAZY_GS + * 2C(%esp) - orig_eax + * 30(%esp) - %eip + * 34(%esp) - %cs + * 38(%esp) - %eflags + * 3C(%esp) - %oldesp + * 40(%esp) - %oldss + */ + +#include <linux/linkage.h> +#include <linux/err.h> +#include <asm/thread_info.h> +#include <asm/irqflags.h> +#include <asm/errno.h> +#include <asm/segment.h> +#include <asm/smp.h> +#include <asm/page_types.h> +#include <asm/percpu.h> +#include <asm/processor-flags.h> +#include <asm/ftrace.h> +#include <asm/irq_vectors.h> +#include <asm/cpufeature.h> +#include <asm/alternative-asm.h> +#include <asm/asm.h> +#include <asm/smap.h> + +/* Avoid __ASSEMBLER__'ifying <linux/audit.h> just for this. */ +#include <linux/elf-em.h> +#define AUDIT_ARCH_I386 (EM_386|__AUDIT_ARCH_LE) +#define __AUDIT_ARCH_LE 0x40000000 + +#ifndef CONFIG_AUDITSYSCALL +# define sysenter_audit syscall_trace_entry +# define sysexit_audit syscall_exit_work +#endif + + .section .entry.text, "ax" + +/* + * We use macros for low-level operations which need to be overridden + * for paravirtualization. The following will never clobber any registers: + * INTERRUPT_RETURN (aka. "iret") + * GET_CR0_INTO_EAX (aka. "movl %cr0, %eax") + * ENABLE_INTERRUPTS_SYSEXIT (aka "sti; sysexit"). + * + * For DISABLE_INTERRUPTS/ENABLE_INTERRUPTS (aka "cli"/"sti"), you must + * specify what registers can be overwritten (CLBR_NONE, CLBR_EAX/EDX/ECX/ANY). + * Allowing a register to be clobbered can shrink the paravirt replacement + * enough to patch inline, increasing performance. + */ + +#ifdef CONFIG_PREEMPT +# define preempt_stop(clobbers) DISABLE_INTERRUPTS(clobbers); TRACE_IRQS_OFF +#else +# define preempt_stop(clobbers) +# define resume_kernel restore_all +#endif + +.macro TRACE_IRQS_IRET +#ifdef CONFIG_TRACE_IRQFLAGS + testl $X86_EFLAGS_IF, PT_EFLAGS(%esp) # interrupts off? + jz 1f + TRACE_IRQS_ON +1: +#endif +.endm + +/* + * User gs save/restore + * + * %gs is used for userland TLS and kernel only uses it for stack + * canary which is required to be at %gs:20 by gcc. Read the comment + * at the top of stackprotector.h for more info. + * + * Local labels 98 and 99 are used. + */ +#ifdef CONFIG_X86_32_LAZY_GS + + /* unfortunately push/pop can't be no-op */ +.macro PUSH_GS + pushl $0 +.endm +.macro POP_GS pop=0 + addl $(4 + \pop), %esp +.endm +.macro POP_GS_EX +.endm + + /* all the rest are no-op */ +.macro PTGS_TO_GS +.endm +.macro PTGS_TO_GS_EX +.endm +.macro GS_TO_REG reg +.endm +.macro REG_TO_PTGS reg +.endm +.macro SET_KERNEL_GS reg +.endm + +#else /* CONFIG_X86_32_LAZY_GS */ + +.macro PUSH_GS + pushl %gs +.endm + +.macro POP_GS pop=0 +98: popl %gs + .if \pop <> 0 + add $\pop, %esp + .endif +.endm +.macro POP_GS_EX +.pushsection .fixup, "ax" +99: movl $0, (%esp) + jmp 98b +.popsection + _ASM_EXTABLE(98b, 99b) +.endm + +.macro PTGS_TO_GS +98: mov PT_GS(%esp), %gs +.endm +.macro PTGS_TO_GS_EX +.pushsection .fixup, "ax" +99: movl $0, PT_GS(%esp) + jmp 98b +.popsection + _ASM_EXTABLE(98b, 99b) +.endm + +.macro GS_TO_REG reg + movl %gs, \reg +.endm +.macro REG_TO_PTGS reg + movl \reg, PT_GS(%esp) +.endm +.macro SET_KERNEL_GS reg + movl $(__KERNEL_STACK_CANARY), \reg + movl \reg, %gs +.endm + +#endif /* CONFIG_X86_32_LAZY_GS */ + +.macro SAVE_ALL + cld + PUSH_GS + pushl %fs + pushl %es + pushl %ds + pushl %eax + pushl %ebp + pushl %edi + pushl %esi + pushl %edx + pushl %ecx + pushl %ebx + movl $(__USER_DS), %edx + movl %edx, %ds + movl %edx, %es + movl $(__KERNEL_PERCPU), %edx + movl %edx, %fs + SET_KERNEL_GS %edx +.endm + +.macro RESTORE_INT_REGS + popl %ebx + popl %ecx + popl %edx + popl %esi + popl %edi + popl %ebp + popl %eax +.endm + +.macro RESTORE_REGS pop=0 + RESTORE_INT_REGS +1: popl %ds +2: popl %es +3: popl %fs + POP_GS \pop +.pushsection .fixup, "ax" +4: movl $0, (%esp) + jmp 1b +5: movl $0, (%esp) + jmp 2b +6: movl $0, (%esp) + jmp 3b +.popsection + _ASM_EXTABLE(1b, 4b) + _ASM_EXTABLE(2b, 5b) + _ASM_EXTABLE(3b, 6b) + POP_GS_EX +.endm + +ENTRY(ret_from_fork) + pushl %eax + call schedule_tail + GET_THREAD_INFO(%ebp) + popl %eax + pushl $0x0202 # Reset kernel eflags + popfl + jmp syscall_exit +END(ret_from_fork) + +ENTRY(ret_from_kernel_thread) + pushl %eax + call schedule_tail + GET_THREAD_INFO(%ebp) + popl %eax + pushl $0x0202 # Reset kernel eflags + popfl + movl PT_EBP(%esp), %eax + call *PT_EBX(%esp) + movl $0, PT_EAX(%esp) + jmp syscall_exit +ENDPROC(ret_from_kernel_thread) + +/* + * Return to user mode is not as complex as all this looks, + * but we want the default path for a system call return to + * go as quickly as possible which is why some of this is + * less clear than it otherwise should be. + */ + + # userspace resumption stub bypassing syscall exit tracing + ALIGN +ret_from_exception: + preempt_stop(CLBR_ANY) +ret_from_intr: + GET_THREAD_INFO(%ebp) +#ifdef CONFIG_VM86 + movl PT_EFLAGS(%esp), %eax # mix EFLAGS and CS + movb PT_CS(%esp), %al + andl $(X86_EFLAGS_VM | SEGMENT_RPL_MASK), %eax +#else + /* + * We can be coming here from child spawned by kernel_thread(). + */ + movl PT_CS(%esp), %eax + andl $SEGMENT_RPL_MASK, %eax +#endif + cmpl $USER_RPL, %eax + jb resume_kernel # not returning to v8086 or userspace + +ENTRY(resume_userspace) + LOCKDEP_SYS_EXIT + DISABLE_INTERRUPTS(CLBR_ANY) # make sure we don't miss an interrupt + # setting need_resched or sigpending + # between sampling and the iret + TRACE_IRQS_OFF + movl TI_flags(%ebp), %ecx + andl $_TIF_WORK_MASK, %ecx # is there any work to be done on + # int/exception return? + jne work_pending + jmp restore_all +END(ret_from_exception) + +#ifdef CONFIG_PREEMPT +ENTRY(resume_kernel) + DISABLE_INTERRUPTS(CLBR_ANY) +need_resched: + cmpl $0, PER_CPU_VAR(__preempt_count) + jnz restore_all + testl $X86_EFLAGS_IF, PT_EFLAGS(%esp) # interrupts off (exception path) ? + jz restore_all + call preempt_schedule_irq + jmp need_resched +END(resume_kernel) +#endif + +/* + * SYSENTER_RETURN points to after the SYSENTER instruction + * in the vsyscall page. See vsyscall-sysentry.S, which defines + * the symbol. + */ + + # SYSENTER call handler stub +ENTRY(entry_SYSENTER_32) + movl TSS_sysenter_sp0(%esp), %esp +sysenter_past_esp: + /* + * Interrupts are disabled here, but we can't trace it until + * enough kernel state to call TRACE_IRQS_OFF can be called - but + * we immediately enable interrupts at that point anyway. + */ + pushl $__USER_DS + pushl %ebp + pushfl + orl $X86_EFLAGS_IF, (%esp) + pushl $__USER_CS + /* + * Push current_thread_info()->sysenter_return to the stack. + * A tiny bit of offset fixup is necessary: TI_sysenter_return + * is relative to thread_info, which is at the bottom of the + * kernel stack page. 4*4 means the 4 words pushed above; + * TOP_OF_KERNEL_STACK_PADDING takes us to the top of the stack; + * and THREAD_SIZE takes us to the bottom. + */ + pushl ((TI_sysenter_return) - THREAD_SIZE + TOP_OF_KERNEL_STACK_PADDING + 4*4)(%esp) + + pushl %eax + SAVE_ALL + ENABLE_INTERRUPTS(CLBR_NONE) + +/* + * Load the potential sixth argument from user stack. + * Careful about security. + */ + cmpl $__PAGE_OFFSET-3, %ebp + jae syscall_fault + ASM_STAC +1: movl (%ebp), %ebp + ASM_CLAC + movl %ebp, PT_EBP(%esp) + _ASM_EXTABLE(1b, syscall_fault) + + GET_THREAD_INFO(%ebp) + + testl $_TIF_WORK_SYSCALL_ENTRY, TI_flags(%ebp) + jnz sysenter_audit +sysenter_do_call: + cmpl $(NR_syscalls), %eax + jae sysenter_badsys + call *sys_call_table(, %eax, 4) +sysenter_after_call: + movl %eax, PT_EAX(%esp) + LOCKDEP_SYS_EXIT + DISABLE_INTERRUPTS(CLBR_ANY) + TRACE_IRQS_OFF + movl TI_flags(%ebp), %ecx + testl $_TIF_ALLWORK_MASK, %ecx + jnz sysexit_audit +sysenter_exit: +/* if something modifies registers it must also disable sysexit */ + movl PT_EIP(%esp), %edx + movl PT_OLDESP(%esp), %ecx + xorl %ebp, %ebp + TRACE_IRQS_ON +1: mov PT_FS(%esp), %fs + PTGS_TO_GS + ENABLE_INTERRUPTS_SYSEXIT + +#ifdef CONFIG_AUDITSYSCALL +sysenter_audit: + testl $(_TIF_WORK_SYSCALL_ENTRY & ~_TIF_SYSCALL_AUDIT), TI_flags(%ebp) + jnz syscall_trace_entry + /* movl PT_EAX(%esp), %eax already set, syscall number: 1st arg to audit */ + movl PT_EBX(%esp), %edx /* ebx/a0: 2nd arg to audit */ + /* movl PT_ECX(%esp), %ecx already set, a1: 3nd arg to audit */ + pushl PT_ESI(%esp) /* a3: 5th arg */ + pushl PT_EDX+4(%esp) /* a2: 4th arg */ + call __audit_syscall_entry + popl %ecx /* get that remapped edx off the stack */ + popl %ecx /* get that remapped esi off the stack */ + movl PT_EAX(%esp), %eax /* reload syscall number */ + jmp sysenter_do_call + +sysexit_audit: + testl $(_TIF_ALLWORK_MASK & ~_TIF_SYSCALL_AUDIT), %ecx + jnz syscall_exit_work + TRACE_IRQS_ON + ENABLE_INTERRUPTS(CLBR_ANY) + movl %eax, %edx /* second arg, syscall return value */ + cmpl $-MAX_ERRNO, %eax /* is it an error ? */ + setbe %al /* 1 if so, 0 if not */ + movzbl %al, %eax /* zero-extend that */ + call __audit_syscall_exit + DISABLE_INTERRUPTS(CLBR_ANY) + TRACE_IRQS_OFF + movl TI_flags(%ebp), %ecx + testl $(_TIF_ALLWORK_MASK & ~_TIF_SYSCALL_AUDIT), %ecx + jnz syscall_exit_work + movl PT_EAX(%esp), %eax /* reload syscall return value */ + jmp sysenter_exit +#endif + +.pushsection .fixup, "ax" +2: movl $0, PT_FS(%esp) + jmp 1b +.popsection + _ASM_EXTABLE(1b, 2b) + PTGS_TO_GS_EX +ENDPROC(entry_SYSENTER_32) + + # system call handler stub +ENTRY(entry_INT80_32) + ASM_CLAC + pushl %eax # save orig_eax + SAVE_ALL + GET_THREAD_INFO(%ebp) + # system call tracing in operation / emulation + testl $_TIF_WORK_SYSCALL_ENTRY, TI_flags(%ebp) + jnz syscall_trace_entry + cmpl $(NR_syscalls), %eax + jae syscall_badsys +syscall_call: + call *sys_call_table(, %eax, 4) +syscall_after_call: + movl %eax, PT_EAX(%esp) # store the return value +syscall_exit: + LOCKDEP_SYS_EXIT + DISABLE_INTERRUPTS(CLBR_ANY) # make sure we don't miss an interrupt + # setting need_resched or sigpending + # between sampling and the iret + TRACE_IRQS_OFF + movl TI_flags(%ebp), %ecx + testl $_TIF_ALLWORK_MASK, %ecx # current->work + jnz syscall_exit_work + +restore_all: + TRACE_IRQS_IRET +restore_all_notrace: +#ifdef CONFIG_X86_ESPFIX32 + movl PT_EFLAGS(%esp), %eax # mix EFLAGS, SS and CS + /* + * Warning: PT_OLDSS(%esp) contains the wrong/random values if we + * are returning to the kernel. + * See comments in process.c:copy_thread() for details. + */ + movb PT_OLDSS(%esp), %ah + movb PT_CS(%esp), %al + andl $(X86_EFLAGS_VM | (SEGMENT_TI_MASK << 8) | SEGMENT_RPL_MASK), %eax + cmpl $((SEGMENT_LDT << 8) | USER_RPL), %eax + je ldt_ss # returning to user-space with LDT SS +#endif +restore_nocheck: + RESTORE_REGS 4 # skip orig_eax/error_code +irq_return: + INTERRUPT_RETURN +.section .fixup, "ax" +ENTRY(iret_exc ) + pushl $0 # no error code + pushl $do_iret_error + jmp error_code +.previous + _ASM_EXTABLE(irq_return, iret_exc) + +#ifdef CONFIG_X86_ESPFIX32 +ldt_ss: +#ifdef CONFIG_PARAVIRT + /* + * The kernel can't run on a non-flat stack if paravirt mode + * is active. Rather than try to fixup the high bits of + * ESP, bypass this code entirely. This may break DOSemu + * and/or Wine support in a paravirt VM, although the option + * is still available to implement the setting of the high + * 16-bits in the INTERRUPT_RETURN paravirt-op. + */ + cmpl $0, pv_info+PARAVIRT_enabled + jne restore_nocheck +#endif + +/* + * Setup and switch to ESPFIX stack + * + * We're returning to userspace with a 16 bit stack. The CPU will not + * restore the high word of ESP for us on executing iret... This is an + * "official" bug of all the x86-compatible CPUs, which we can work + * around to make dosemu and wine happy. We do this by preloading the + * high word of ESP with the high word of the userspace ESP while + * compensating for the offset by changing to the ESPFIX segment with + * a base address that matches for the difference. + */ +#define GDT_ESPFIX_SS PER_CPU_VAR(gdt_page) + (GDT_ENTRY_ESPFIX_SS * 8) + mov %esp, %edx /* load kernel esp */ + mov PT_OLDESP(%esp), %eax /* load userspace esp */ + mov %dx, %ax /* eax: new kernel esp */ + sub %eax, %edx /* offset (low word is 0) */ + shr $16, %edx + mov %dl, GDT_ESPFIX_SS + 4 /* bits 16..23 */ + mov %dh, GDT_ESPFIX_SS + 7 /* bits 24..31 */ + pushl $__ESPFIX_SS + pushl %eax /* new kernel esp */ + /* + * Disable interrupts, but do not irqtrace this section: we + * will soon execute iret and the tracer was already set to + * the irqstate after the IRET: + */ + DISABLE_INTERRUPTS(CLBR_EAX) + lss (%esp), %esp /* switch to espfix segment */ + jmp restore_nocheck +#endif +ENDPROC(entry_INT80_32) + + # perform work that needs to be done immediately before resumption + ALIGN +work_pending: + testb $_TIF_NEED_RESCHED, %cl + jz work_notifysig +work_resched: + call schedule + LOCKDEP_SYS_EXIT + DISABLE_INTERRUPTS(CLBR_ANY) # make sure we don't miss an interrupt + # setting need_resched or sigpending + # between sampling and the iret + TRACE_IRQS_OFF + movl TI_flags(%ebp), %ecx + andl $_TIF_WORK_MASK, %ecx # is there any work to be done other + # than syscall tracing? + jz restore_all + testb $_TIF_NEED_RESCHED, %cl + jnz work_resched + +work_notifysig: # deal with pending signals and + # notify-resume requests +#ifdef CONFIG_VM86 + testl $X86_EFLAGS_VM, PT_EFLAGS(%esp) + movl %esp, %eax + jnz work_notifysig_v86 # returning to kernel-space or + # vm86-space +1: +#else + movl %esp, %eax +#endif + TRACE_IRQS_ON + ENABLE_INTERRUPTS(CLBR_NONE) + movb PT_CS(%esp), %bl + andb $SEGMENT_RPL_MASK, %bl + cmpb $USER_RPL, %bl + jb resume_kernel + xorl %edx, %edx + call do_notify_resume + jmp resume_userspace + +#ifdef CONFIG_VM86 + ALIGN +work_notifysig_v86: + pushl %ecx # save ti_flags for do_notify_resume + call save_v86_state # %eax contains pt_regs pointer + popl %ecx + movl %eax, %esp + jmp 1b +#endif +END(work_pending) + + # perform syscall exit tracing + ALIGN +syscall_trace_entry: + movl $-ENOSYS, PT_EAX(%esp) + movl %esp, %eax + call syscall_trace_enter + /* What it returned is what we'll actually use. */ + cmpl $(NR_syscalls), %eax + jnae syscall_call + jmp syscall_exit +END(syscall_trace_entry) + + # perform syscall exit tracing + ALIGN +syscall_exit_work: + testl $_TIF_WORK_SYSCALL_EXIT, %ecx + jz work_pending + TRACE_IRQS_ON + ENABLE_INTERRUPTS(CLBR_ANY) # could let syscall_trace_leave() call + # schedule() instead + movl %esp, %eax + call syscall_trace_leave + jmp resume_userspace +END(syscall_exit_work) + +syscall_fault: + ASM_CLAC + GET_THREAD_INFO(%ebp) + movl $-EFAULT, PT_EAX(%esp) + jmp resume_userspace +END(syscall_fault) + +syscall_badsys: + movl $-ENOSYS, %eax + jmp syscall_after_call +END(syscall_badsys) + +sysenter_badsys: + movl $-ENOSYS, %eax + jmp sysenter_after_call +END(sysenter_badsys) + +.macro FIXUP_ESPFIX_STACK +/* + * Switch back for ESPFIX stack to the normal zerobased stack + * + * We can't call C functions using the ESPFIX stack. This code reads + * the high word of the segment base from the GDT and swiches to the + * normal stack and adjusts ESP with the matching offset. + */ +#ifdef CONFIG_X86_ESPFIX32 + /* fixup the stack */ + mov GDT_ESPFIX_SS + 4, %al /* bits 16..23 */ + mov GDT_ESPFIX_SS + 7, %ah /* bits 24..31 */ + shl $16, %eax + addl %esp, %eax /* the adjusted stack pointer */ + pushl $__KERNEL_DS + pushl %eax + lss (%esp), %esp /* switch to the normal stack segment */ +#endif +.endm +.macro UNWIND_ESPFIX_STACK +#ifdef CONFIG_X86_ESPFIX32 + movl %ss, %eax + /* see if on espfix stack */ + cmpw $__ESPFIX_SS, %ax + jne 27f + movl $__KERNEL_DS, %eax + movl %eax, %ds + movl %eax, %es + /* switch to normal stack */ + FIXUP_ESPFIX_STACK +27: +#endif +.endm + +/* + * Build the entry stubs with some assembler magic. + * We pack 1 stub into every 8-byte block. + */ + .align 8 +ENTRY(irq_entries_start) + vector=FIRST_EXTERNAL_VECTOR + .rept (FIRST_SYSTEM_VECTOR - FIRST_EXTERNAL_VECTOR) + pushl $(~vector+0x80) /* Note: always in signed byte range */ + vector=vector+1 + jmp common_interrupt + .align 8 + .endr +END(irq_entries_start) + +/* + * the CPU automatically disables interrupts when executing an IRQ vector, + * so IRQ-flags tracing has to follow that: + */ + .p2align CONFIG_X86_L1_CACHE_SHIFT +common_interrupt: + ASM_CLAC + addl $-0x80, (%esp) /* Adjust vector into the [-256, -1] range */ + SAVE_ALL + TRACE_IRQS_OFF + movl %esp, %eax + call do_IRQ + jmp ret_from_intr +ENDPROC(common_interrupt) + +#define BUILD_INTERRUPT3(name, nr, fn) \ +ENTRY(name) \ + ASM_CLAC; \ + pushl $~(nr); \ + SAVE_ALL; \ + TRACE_IRQS_OFF \ + movl %esp, %eax; \ + call fn; \ + jmp ret_from_intr; \ +ENDPROC(name) + + +#ifdef CONFIG_TRACING +# define TRACE_BUILD_INTERRUPT(name, nr) BUILD_INTERRUPT3(trace_##name, nr, smp_trace_##name) +#else +# define TRACE_BUILD_INTERRUPT(name, nr) +#endif + +#define BUILD_INTERRUPT(name, nr) \ + BUILD_INTERRUPT3(name, nr, smp_##name); \ + TRACE_BUILD_INTERRUPT(name, nr) + +/* The include is where all of the SMP etc. interrupts come from */ +#include <asm/entry_arch.h> + +ENTRY(coprocessor_error) + ASM_CLAC + pushl $0 + pushl $do_coprocessor_error + jmp error_code +END(coprocessor_error) + +ENTRY(simd_coprocessor_error) + ASM_CLAC + pushl $0 +#ifdef CONFIG_X86_INVD_BUG + /* AMD 486 bug: invd from userspace calls exception 19 instead of #GP */ + ALTERNATIVE "pushl $do_general_protection", \ + "pushl $do_simd_coprocessor_error", \ + X86_FEATURE_XMM +#else + pushl $do_simd_coprocessor_error +#endif + jmp error_code +END(simd_coprocessor_error) + +ENTRY(device_not_available) + ASM_CLAC + pushl $-1 # mark this as an int + pushl $do_device_not_available + jmp error_code +END(device_not_available) + +#ifdef CONFIG_PARAVIRT +ENTRY(native_iret) + iret + _ASM_EXTABLE(native_iret, iret_exc) +END(native_iret) + +ENTRY(native_irq_enable_sysexit) + sti + sysexit +END(native_irq_enable_sysexit) +#endif + +ENTRY(overflow) + ASM_CLAC + pushl $0 + pushl $do_overflow + jmp error_code +END(overflow) + +ENTRY(bounds) + ASM_CLAC + pushl $0 + pushl $do_bounds + jmp error_code +END(bounds) + +ENTRY(invalid_op) + ASM_CLAC + pushl $0 + pushl $do_invalid_op + jmp error_code +END(invalid_op) + +ENTRY(coprocessor_segment_overrun) + ASM_CLAC + pushl $0 + pushl $do_coprocessor_segment_overrun + jmp error_code +END(coprocessor_segment_overrun) + +ENTRY(invalid_TSS) + ASM_CLAC + pushl $do_invalid_TSS + jmp error_code +END(invalid_TSS) + +ENTRY(segment_not_present) + ASM_CLAC + pushl $do_segment_not_present + jmp error_code +END(segment_not_present) + +ENTRY(stack_segment) + ASM_CLAC + pushl $do_stack_segment + jmp error_code +END(stack_segment) + +ENTRY(alignment_check) + ASM_CLAC + pushl $do_alignment_check + jmp error_code +END(alignment_check) + +ENTRY(divide_error) + ASM_CLAC + pushl $0 # no error code + pushl $do_divide_error + jmp error_code +END(divide_error) + +#ifdef CONFIG_X86_MCE +ENTRY(machine_check) + ASM_CLAC + pushl $0 + pushl machine_check_vector + jmp error_code +END(machine_check) +#endif + +ENTRY(spurious_interrupt_bug) + ASM_CLAC + pushl $0 + pushl $do_spurious_interrupt_bug + jmp error_code +END(spurious_interrupt_bug) + +#ifdef CONFIG_XEN +/* + * Xen doesn't set %esp to be precisely what the normal SYSENTER + * entry point expects, so fix it up before using the normal path. + */ +ENTRY(xen_sysenter_target) + addl $5*4, %esp /* remove xen-provided frame */ + jmp sysenter_past_esp + +ENTRY(xen_hypervisor_callback) + pushl $-1 /* orig_ax = -1 => not a system call */ + SAVE_ALL + TRACE_IRQS_OFF + + /* + * Check to see if we got the event in the critical + * region in xen_iret_direct, after we've reenabled + * events and checked for pending events. This simulates + * iret instruction's behaviour where it delivers a + * pending interrupt when enabling interrupts: + */ + movl PT_EIP(%esp), %eax + cmpl $xen_iret_start_crit, %eax + jb 1f + cmpl $xen_iret_end_crit, %eax + jae 1f + + jmp xen_iret_crit_fixup + +ENTRY(xen_do_upcall) +1: mov %esp, %eax + call xen_evtchn_do_upcall +#ifndef CONFIG_PREEMPT + call xen_maybe_preempt_hcall +#endif + jmp ret_from_intr +ENDPROC(xen_hypervisor_callback) + +/* + * Hypervisor uses this for application faults while it executes. + * We get here for two reasons: + * 1. Fault while reloading DS, ES, FS or GS + * 2. Fault while executing IRET + * Category 1 we fix up by reattempting the load, and zeroing the segment + * register if the load fails. + * Category 2 we fix up by jumping to do_iret_error. We cannot use the + * normal Linux return path in this case because if we use the IRET hypercall + * to pop the stack frame we end up in an infinite loop of failsafe callbacks. + * We distinguish between categories by maintaining a status value in EAX. + */ +ENTRY(xen_failsafe_callback) + pushl %eax + movl $1, %eax +1: mov 4(%esp), %ds +2: mov 8(%esp), %es +3: mov 12(%esp), %fs +4: mov 16(%esp), %gs + /* EAX == 0 => Category 1 (Bad segment) + EAX != 0 => Category 2 (Bad IRET) */ + testl %eax, %eax + popl %eax + lea 16(%esp), %esp + jz 5f + jmp iret_exc +5: pushl $-1 /* orig_ax = -1 => not a system call */ + SAVE_ALL + jmp ret_from_exception + +.section .fixup, "ax" +6: xorl %eax, %eax + movl %eax, 4(%esp) + jmp 1b +7: xorl %eax, %eax + movl %eax, 8(%esp) + jmp 2b +8: xorl %eax, %eax + movl %eax, 12(%esp) + jmp 3b +9: xorl %eax, %eax + movl %eax, 16(%esp) + jmp 4b +.previous + _ASM_EXTABLE(1b, 6b) + _ASM_EXTABLE(2b, 7b) + _ASM_EXTABLE(3b, 8b) + _ASM_EXTABLE(4b, 9b) +ENDPROC(xen_failsafe_callback) + +BUILD_INTERRUPT3(xen_hvm_callback_vector, HYPERVISOR_CALLBACK_VECTOR, + xen_evtchn_do_upcall) + +#endif /* CONFIG_XEN */ + +#if IS_ENABLED(CONFIG_HYPERV) + +BUILD_INTERRUPT3(hyperv_callback_vector, HYPERVISOR_CALLBACK_VECTOR, + hyperv_vector_handler) + +#endif /* CONFIG_HYPERV */ + +#ifdef CONFIG_FUNCTION_TRACER +#ifdef CONFIG_DYNAMIC_FTRACE + +ENTRY(mcount) + ret +END(mcount) + +ENTRY(ftrace_caller) + pushl %eax + pushl %ecx + pushl %edx + pushl $0 /* Pass NULL as regs pointer */ + movl 4*4(%esp), %eax + movl 0x4(%ebp), %edx + movl function_trace_op, %ecx + subl $MCOUNT_INSN_SIZE, %eax + +.globl ftrace_call +ftrace_call: + call ftrace_stub + + addl $4, %esp /* skip NULL pointer */ + popl %edx + popl %ecx + popl %eax +ftrace_ret: +#ifdef CONFIG_FUNCTION_GRAPH_TRACER +.globl ftrace_graph_call +ftrace_graph_call: + jmp ftrace_stub +#endif + +.globl ftrace_stub +ftrace_stub: + ret +END(ftrace_caller) + +ENTRY(ftrace_regs_caller) + pushf /* push flags before compare (in cs location) */ + + /* + * i386 does not save SS and ESP when coming from kernel. + * Instead, to get sp, ®s->sp is used (see ptrace.h). + * Unfortunately, that means eflags must be at the same location + * as the current return ip is. We move the return ip into the + * ip location, and move flags into the return ip location. + */ + pushl 4(%esp) /* save return ip into ip slot */ + + pushl $0 /* Load 0 into orig_ax */ + pushl %gs + pushl %fs + pushl %es + pushl %ds + pushl %eax + pushl %ebp + pushl %edi + pushl %esi + pushl %edx + pushl %ecx + pushl %ebx + + movl 13*4(%esp), %eax /* Get the saved flags */ + movl %eax, 14*4(%esp) /* Move saved flags into regs->flags location */ + /* clobbering return ip */ + movl $__KERNEL_CS, 13*4(%esp) + + movl 12*4(%esp), %eax /* Load ip (1st parameter) */ + subl $MCOUNT_INSN_SIZE, %eax /* Adjust ip */ + movl 0x4(%ebp), %edx /* Load parent ip (2nd parameter) */ + movl function_trace_op, %ecx /* Save ftrace_pos in 3rd parameter */ + pushl %esp /* Save pt_regs as 4th parameter */ + +GLOBAL(ftrace_regs_call) + call ftrace_stub + + addl $4, %esp /* Skip pt_regs */ + movl 14*4(%esp), %eax /* Move flags back into cs */ + movl %eax, 13*4(%esp) /* Needed to keep addl from modifying flags */ + movl 12*4(%esp), %eax /* Get return ip from regs->ip */ + movl %eax, 14*4(%esp) /* Put return ip back for ret */ + + popl %ebx + popl %ecx + popl %edx + popl %esi + popl %edi + popl %ebp + popl %eax + popl %ds + popl %es + popl %fs + popl %gs + addl $8, %esp /* Skip orig_ax and ip */ + popf /* Pop flags at end (no addl to corrupt flags) */ + jmp ftrace_ret + + popf + jmp ftrace_stub +#else /* ! CONFIG_DYNAMIC_FTRACE */ + +ENTRY(mcount) + cmpl $__PAGE_OFFSET, %esp + jb ftrace_stub /* Paging not enabled yet? */ + + cmpl $ftrace_stub, ftrace_trace_function + jnz trace +#ifdef CONFIG_FUNCTION_GRAPH_TRACER + cmpl $ftrace_stub, ftrace_graph_return + jnz ftrace_graph_caller + + cmpl $ftrace_graph_entry_stub, ftrace_graph_entry + jnz ftrace_graph_caller +#endif +.globl ftrace_stub +ftrace_stub: + ret + + /* taken from glibc */ +trace: + pushl %eax + pushl %ecx + pushl %edx + movl 0xc(%esp), %eax + movl 0x4(%ebp), %edx + subl $MCOUNT_INSN_SIZE, %eax + + call *ftrace_trace_function + + popl %edx + popl %ecx + popl %eax + jmp ftrace_stub +END(mcount) +#endif /* CONFIG_DYNAMIC_FTRACE */ +#endif /* CONFIG_FUNCTION_TRACER */ + +#ifdef CONFIG_FUNCTION_GRAPH_TRACER +ENTRY(ftrace_graph_caller) + pushl %eax + pushl %ecx + pushl %edx + movl 0xc(%esp), %eax + lea 0x4(%ebp), %edx + movl (%ebp), %ecx + subl $MCOUNT_INSN_SIZE, %eax + call prepare_ftrace_return + popl %edx + popl %ecx + popl %eax + ret +END(ftrace_graph_caller) + +.globl return_to_handler +return_to_handler: + pushl %eax + pushl %edx + movl %ebp, %eax + call ftrace_return_to_handler + movl %eax, %ecx + popl %edx + popl %eax + jmp *%ecx +#endif + +#ifdef CONFIG_TRACING +ENTRY(trace_page_fault) + ASM_CLAC + pushl $trace_do_page_fault + jmp error_code +END(trace_page_fault) +#endif + +ENTRY(page_fault) + ASM_CLAC + pushl $do_page_fault + ALIGN +error_code: + /* the function address is in %gs's slot on the stack */ + pushl %fs + pushl %es + pushl %ds + pushl %eax + pushl %ebp + pushl %edi + pushl %esi + pushl %edx + pushl %ecx + pushl %ebx + cld + movl $(__KERNEL_PERCPU), %ecx + movl %ecx, %fs + UNWIND_ESPFIX_STACK + GS_TO_REG %ecx + movl PT_GS(%esp), %edi # get the function address + movl PT_ORIG_EAX(%esp), %edx # get the error code + movl $-1, PT_ORIG_EAX(%esp) # no syscall to restart + REG_TO_PTGS %ecx + SET_KERNEL_GS %ecx + movl $(__USER_DS), %ecx + movl %ecx, %ds + movl %ecx, %es + TRACE_IRQS_OFF + movl %esp, %eax # pt_regs pointer + call *%edi + jmp ret_from_exception +END(page_fault) + +/* + * Debug traps and NMI can happen at the one SYSENTER instruction + * that sets up the real kernel stack. Check here, since we can't + * allow the wrong stack to be used. + * + * "TSS_sysenter_sp0+12" is because the NMI/debug handler will have + * already pushed 3 words if it hits on the sysenter instruction: + * eflags, cs and eip. + * + * We just load the right stack, and push the three (known) values + * by hand onto the new stack - while updating the return eip past + * the instruction that would have done it for sysenter. + */ +.macro FIX_STACK offset ok label + cmpw $__KERNEL_CS, 4(%esp) + jne \ok +\label: + movl TSS_sysenter_sp0 + \offset(%esp), %esp + pushfl + pushl $__KERNEL_CS + pushl $sysenter_past_esp +.endm + +ENTRY(debug) + ASM_CLAC + cmpl $entry_SYSENTER_32, (%esp) + jne debug_stack_correct + FIX_STACK 12, debug_stack_correct, debug_esp_fix_insn +debug_stack_correct: + pushl $-1 # mark this as an int + SAVE_ALL + TRACE_IRQS_OFF + xorl %edx, %edx # error code 0 + movl %esp, %eax # pt_regs pointer + call do_debug + jmp ret_from_exception +END(debug) + +/* + * NMI is doubly nasty. It can happen _while_ we're handling + * a debug fault, and the debug fault hasn't yet been able to + * clear up the stack. So we first check whether we got an + * NMI on the sysenter entry path, but after that we need to + * check whether we got an NMI on the debug path where the debug + * fault happened on the sysenter path. + */ +ENTRY(nmi) + ASM_CLAC +#ifdef CONFIG_X86_ESPFIX32 + pushl %eax + movl %ss, %eax + cmpw $__ESPFIX_SS, %ax + popl %eax + je nmi_espfix_stack +#endif + cmpl $entry_SYSENTER_32, (%esp) + je nmi_stack_fixup + pushl %eax + movl %esp, %eax + /* + * Do not access memory above the end of our stack page, + * it might not exist. + */ + andl $(THREAD_SIZE-1), %eax + cmpl $(THREAD_SIZE-20), %eax + popl %eax + jae nmi_stack_correct + cmpl $entry_SYSENTER_32, 12(%esp) + je nmi_debug_stack_check +nmi_stack_correct: + pushl %eax + SAVE_ALL + xorl %edx, %edx # zero error code + movl %esp, %eax # pt_regs pointer + call do_nmi + jmp restore_all_notrace + +nmi_stack_fixup: + FIX_STACK 12, nmi_stack_correct, 1 + jmp nmi_stack_correct + +nmi_debug_stack_check: + cmpw $__KERNEL_CS, 16(%esp) + jne nmi_stack_correct + cmpl $debug, (%esp) + jb nmi_stack_correct + cmpl $debug_esp_fix_insn, (%esp) + ja nmi_stack_correct + FIX_STACK 24, nmi_stack_correct, 1 + jmp nmi_stack_correct + +#ifdef CONFIG_X86_ESPFIX32 +nmi_espfix_stack: + /* + * create the pointer to lss back + */ + pushl %ss + pushl %esp + addl $4, (%esp) + /* copy the iret frame of 12 bytes */ + .rept 3 + pushl 16(%esp) + .endr + pushl %eax + SAVE_ALL + FIXUP_ESPFIX_STACK # %eax == %esp + xorl %edx, %edx # zero error code + call do_nmi + RESTORE_REGS + lss 12+4(%esp), %esp # back to espfix stack + jmp irq_return +#endif +END(nmi) + +ENTRY(int3) + ASM_CLAC + pushl $-1 # mark this as an int + SAVE_ALL + TRACE_IRQS_OFF + xorl %edx, %edx # zero error code + movl %esp, %eax # pt_regs pointer + call do_int3 + jmp ret_from_exception +END(int3) + +ENTRY(general_protection) + pushl $do_general_protection + jmp error_code +END(general_protection) + +#ifdef CONFIG_KVM_GUEST +ENTRY(async_page_fault) + ASM_CLAC + pushl $do_async_page_fault + jmp error_code +END(async_page_fault) +#endif diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/entry/entry_64.S index 02c2eff..3bb2c43 100644 --- a/arch/x86/kernel/entry_64.S +++ b/arch/x86/entry/entry_64.S @@ -4,34 +4,25 @@ * Copyright (C) 1991, 1992 Linus Torvalds * Copyright (C) 2000, 2001, 2002 Andi Kleen SuSE Labs * Copyright (C) 2000 Pavel Machek <pavel@suse.cz> - */ - -/* + * * entry.S contains the system-call and fault low-level handling routines. * * Some of this is documented in Documentation/x86/entry_64.txt * - * NOTE: This code handles signal-recognition, which happens every time - * after an interrupt and after each system call. - * * A note on terminology: - * - iret frame: Architecture defined interrupt frame from SS to RIP - * at the top of the kernel process stack. + * - iret frame: Architecture defined interrupt frame from SS to RIP + * at the top of the kernel process stack. * * Some macro usage: - * - CFI macros are used to generate dwarf2 unwind information for better - * backtraces. They don't change any code. - * - ENTRY/END Define functions in the symbol table. - * - TRACE_IRQ_* - Trace hard interrupt state for lock debugging. - * - idtentry - Define exception entry points. + * - ENTRY/END: Define functions in the symbol table. + * - TRACE_IRQ_*: Trace hardirq state for lock debugging. + * - idtentry: Define exception entry points. */ - #include <linux/linkage.h> #include <asm/segment.h> #include <asm/cache.h> #include <asm/errno.h> -#include <asm/dwarf2.h> -#include <asm/calling.h> +#include "calling.h" #include <asm/asm-offsets.h> #include <asm/msr.h> #include <asm/unistd.h> @@ -49,13 +40,12 @@ /* Avoid __ASSEMBLER__'ifying <linux/audit.h> just for this. */ #include <linux/elf-em.h> -#define AUDIT_ARCH_X86_64 (EM_X86_64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE) -#define __AUDIT_ARCH_64BIT 0x80000000 -#define __AUDIT_ARCH_LE 0x40000000 - - .code64 - .section .entry.text, "ax" +#define AUDIT_ARCH_X86_64 (EM_X86_64|__AUDIT_ARCH_64BIT|__AUDIT_ARCH_LE) +#define __AUDIT_ARCH_64BIT 0x80000000 +#define __AUDIT_ARCH_LE 0x40000000 +.code64 +.section .entry.text, "ax" #ifdef CONFIG_PARAVIRT ENTRY(native_usergs_sysret64) @@ -64,11 +54,10 @@ ENTRY(native_usergs_sysret64) ENDPROC(native_usergs_sysret64) #endif /* CONFIG_PARAVIRT */ - .macro TRACE_IRQS_IRETQ #ifdef CONFIG_TRACE_IRQFLAGS - bt $9,EFLAGS(%rsp) /* interrupts off? */ - jnc 1f + bt $9, EFLAGS(%rsp) /* interrupts off? */ + jnc 1f TRACE_IRQS_ON 1: #endif @@ -88,89 +77,34 @@ ENDPROC(native_usergs_sysret64) #if defined(CONFIG_DYNAMIC_FTRACE) && defined(CONFIG_TRACE_IRQFLAGS) .macro TRACE_IRQS_OFF_DEBUG - call debug_stack_set_zero + call debug_stack_set_zero TRACE_IRQS_OFF - call debug_stack_reset + call debug_stack_reset .endm .macro TRACE_IRQS_ON_DEBUG - call debug_stack_set_zero + call debug_stack_set_zero TRACE_IRQS_ON - call debug_stack_reset + call debug_stack_reset .endm .macro TRACE_IRQS_IRETQ_DEBUG - bt $9,EFLAGS(%rsp) /* interrupts off? */ - jnc 1f + bt $9, EFLAGS(%rsp) /* interrupts off? */ + jnc 1f TRACE_IRQS_ON_DEBUG 1: .endm #else -# define TRACE_IRQS_OFF_DEBUG TRACE_IRQS_OFF -# define TRACE_IRQS_ON_DEBUG TRACE_IRQS_ON -# define TRACE_IRQS_IRETQ_DEBUG TRACE_IRQS_IRETQ +# define TRACE_IRQS_OFF_DEBUG TRACE_IRQS_OFF +# define TRACE_IRQS_ON_DEBUG TRACE_IRQS_ON +# define TRACE_IRQS_IRETQ_DEBUG TRACE_IRQS_IRETQ #endif /* - * empty frame - */ - .macro EMPTY_FRAME start=1 offset=0 - .if \start - CFI_STARTPROC simple - CFI_SIGNAL_FRAME - CFI_DEF_CFA rsp,8+\offset - .else - CFI_DEF_CFA_OFFSET 8+\offset - .endif - .endm - -/* - * initial frame state for interrupts (and exceptions without error code) - */ - .macro INTR_FRAME start=1 offset=0 - EMPTY_FRAME \start, 5*8+\offset - /*CFI_REL_OFFSET ss, 4*8+\offset*/ - CFI_REL_OFFSET rsp, 3*8+\offset - /*CFI_REL_OFFSET rflags, 2*8+\offset*/ - /*CFI_REL_OFFSET cs, 1*8+\offset*/ - CFI_REL_OFFSET rip, 0*8+\offset - .endm - -/* - * initial frame state for exceptions with error code (and interrupts - * with vector already pushed) - */ - .macro XCPT_FRAME start=1 offset=0 - INTR_FRAME \start, 1*8+\offset - .endm - -/* - * frame that enables passing a complete pt_regs to a C function. - */ - .macro DEFAULT_FRAME start=1 offset=0 - XCPT_FRAME \start, ORIG_RAX+\offset - CFI_REL_OFFSET rdi, RDI+\offset - CFI_REL_OFFSET rsi, RSI+\offset - CFI_REL_OFFSET rdx, RDX+\offset - CFI_REL_OFFSET rcx, RCX+\offset - CFI_REL_OFFSET rax, RAX+\offset - CFI_REL_OFFSET r8, R8+\offset - CFI_REL_OFFSET r9, R9+\offset - CFI_REL_OFFSET r10, R10+\offset - CFI_REL_OFFSET r11, R11+\offset - CFI_REL_OFFSET rbx, RBX+\offset - CFI_REL_OFFSET rbp, RBP+\offset - CFI_REL_OFFSET r12, R12+\offset - CFI_REL_OFFSET r13, R13+\offset - CFI_REL_OFFSET r14, R14+\offset - CFI_REL_OFFSET r15, R15+\offset - .endm - -/* - * 64bit SYSCALL instruction entry. Up to 6 arguments in registers. + * 64-bit SYSCALL instruction entry. Up to 6 arguments in registers. * - * 64bit SYSCALL saves rip to rcx, clears rflags.RF, then saves rflags to r11, + * 64-bit SYSCALL saves rip to rcx, clears rflags.RF, then saves rflags to r11, * then loads new ss, cs, and rip from previously programmed MSRs. * rflags gets masked by a value from another MSR (so CLD and CLAC * are not needed). SYSCALL does not save anything on the stack @@ -186,7 +120,7 @@ ENDPROC(native_usergs_sysret64) * r10 arg3 (needs to be moved to rcx to conform to C ABI) * r8 arg4 * r9 arg5 - * (note: r12-r15,rbp,rbx are callee-preserved in C ABI) + * (note: r12-r15, rbp, rbx are callee-preserved in C ABI) * * Only called from user space. * @@ -195,13 +129,7 @@ ENDPROC(native_usergs_sysret64) * with them due to bugs in both AMD and Intel CPUs. */ -ENTRY(system_call) - CFI_STARTPROC simple - CFI_SIGNAL_FRAME - CFI_DEF_CFA rsp,0 - CFI_REGISTER rip,rcx - /*CFI_REGISTER rflags,r11*/ - +ENTRY(entry_SYSCALL_64) /* * Interrupts are off on entry. * We do not frame this tiny irq-off block with TRACE_IRQS_OFF/ON, @@ -213,14 +141,14 @@ ENTRY(system_call) * after the swapgs, so that it can do the swapgs * for the guest and jump here on syscall. */ -GLOBAL(system_call_after_swapgs) +GLOBAL(entry_SYSCALL_64_after_swapgs) - movq %rsp,PER_CPU_VAR(rsp_scratch) - movq PER_CPU_VAR(kernel_stack),%rsp + movq %rsp, PER_CPU_VAR(rsp_scratch) + movq PER_CPU_VAR(cpu_current_top_of_stack), %rsp /* Construct struct pt_regs on stack */ - pushq_cfi $__USER_DS /* pt_regs->ss */ - pushq_cfi PER_CPU_VAR(rsp_scratch) /* pt_regs->sp */ + pushq $__USER_DS /* pt_regs->ss */ + pushq PER_CPU_VAR(rsp_scratch) /* pt_regs->sp */ /* * Re-enable interrupts. * We use 'rsp_scratch' as a scratch space, hence irq-off block above @@ -229,36 +157,34 @@ GLOBAL(system_call_after_swapgs) * with using rsp_scratch: */ ENABLE_INTERRUPTS(CLBR_NONE) - pushq_cfi %r11 /* pt_regs->flags */ - pushq_cfi $__USER_CS /* pt_regs->cs */ - pushq_cfi %rcx /* pt_regs->ip */ - CFI_REL_OFFSET rip,0 - pushq_cfi_reg rax /* pt_regs->orig_ax */ - pushq_cfi_reg rdi /* pt_regs->di */ - pushq_cfi_reg rsi /* pt_regs->si */ - pushq_cfi_reg rdx /* pt_regs->dx */ - pushq_cfi_reg rcx /* pt_regs->cx */ - pushq_cfi $-ENOSYS /* pt_regs->ax */ - pushq_cfi_reg r8 /* pt_regs->r8 */ - pushq_cfi_reg r9 /* pt_regs->r9 */ - pushq_cfi_reg r10 /* pt_regs->r10 */ - pushq_cfi_reg r11 /* pt_regs->r11 */ - sub $(6*8),%rsp /* pt_regs->bp,bx,r12-15 not saved */ - CFI_ADJUST_CFA_OFFSET 6*8 - - testl $_TIF_WORK_SYSCALL_ENTRY, ASM_THREAD_INFO(TI_flags, %rsp, SIZEOF_PTREGS) - jnz tracesys -system_call_fastpath: + pushq %r11 /* pt_regs->flags */ + pushq $__USER_CS /* pt_regs->cs */ + pushq %rcx /* pt_regs->ip */ + pushq %rax /* pt_regs->orig_ax */ + pushq %rdi /* pt_regs->di */ + pushq %rsi /* pt_regs->si */ + pushq %rdx /* pt_regs->dx */ + pushq %rcx /* pt_regs->cx */ + pushq $-ENOSYS /* pt_regs->ax */ + pushq %r8 /* pt_regs->r8 */ + pushq %r9 /* pt_regs->r9 */ + pushq %r10 /* pt_regs->r10 */ + pushq %r11 /* pt_regs->r11 */ + sub $(6*8), %rsp /* pt_regs->bp, bx, r12-15 not saved */ + + testl $_TIF_WORK_SYSCALL_ENTRY, ASM_THREAD_INFO(TI_flags, %rsp, SIZEOF_PTREGS) + jnz tracesys +entry_SYSCALL_64_fastpath: #if __SYSCALL_MASK == ~0 - cmpq $__NR_syscall_max,%rax + cmpq $__NR_syscall_max, %rax #else - andl $__SYSCALL_MASK,%eax - cmpl $__NR_syscall_max,%eax + andl $__SYSCALL_MASK, %eax + cmpl $__NR_syscall_max, %eax #endif - ja 1f /* return -ENOSYS (already in pt_regs->ax) */ - movq %r10,%rcx - call *sys_call_table(,%rax,8) - movq %rax,RAX(%rsp) + ja 1f /* return -ENOSYS (already in pt_regs->ax) */ + movq %r10, %rcx + call *sys_call_table(, %rax, 8) + movq %rax, RAX(%rsp) 1: /* * Syscall return path ending with SYSRET (fast path). @@ -279,19 +205,15 @@ system_call_fastpath: * flags (TIF_NOTIFY_RESUME, TIF_USER_RETURN_NOTIFY, etc) set is * very bad. */ - testl $_TIF_ALLWORK_MASK, ASM_THREAD_INFO(TI_flags, %rsp, SIZEOF_PTREGS) - jnz int_ret_from_sys_call_irqs_off /* Go to the slow path */ - - CFI_REMEMBER_STATE + testl $_TIF_ALLWORK_MASK, ASM_THREAD_INFO(TI_flags, %rsp, SIZEOF_PTREGS) + jnz int_ret_from_sys_call_irqs_off /* Go to the slow path */ RESTORE_C_REGS_EXCEPT_RCX_R11 - movq RIP(%rsp),%rcx - CFI_REGISTER rip,rcx - movq EFLAGS(%rsp),%r11 - /*CFI_REGISTER rflags,r11*/ - movq RSP(%rsp),%rsp + movq RIP(%rsp), %rcx + movq EFLAGS(%rsp), %r11 + movq RSP(%rsp), %rsp /* - * 64bit SYSRET restores rip from rcx, + * 64-bit SYSRET restores rip from rcx, * rflags from r11 (but RF and VM bits are forced to 0), * cs and ss are loaded from MSRs. * Restoration of rflags re-enables interrupts. @@ -307,25 +229,23 @@ system_call_fastpath: */ USERGS_SYSRET64 - CFI_RESTORE_STATE - /* Do syscall entry tracing */ tracesys: - movq %rsp, %rdi - movl $AUDIT_ARCH_X86_64, %esi - call syscall_trace_enter_phase1 - test %rax, %rax - jnz tracesys_phase2 /* if needed, run the slow path */ - RESTORE_C_REGS_EXCEPT_RAX /* else restore clobbered regs */ - movq ORIG_RAX(%rsp), %rax - jmp system_call_fastpath /* and return to the fast path */ + movq %rsp, %rdi + movl $AUDIT_ARCH_X86_64, %esi + call syscall_trace_enter_phase1 + test %rax, %rax + jnz tracesys_phase2 /* if needed, run the slow path */ + RESTORE_C_REGS_EXCEPT_RAX /* else restore clobbered regs */ + movq ORIG_RAX(%rsp), %rax + jmp entry_SYSCALL_64_fastpath /* and return to the fast path */ tracesys_phase2: SAVE_EXTRA_REGS - movq %rsp, %rdi - movl $AUDIT_ARCH_X86_64, %esi - movq %rax,%rdx - call syscall_trace_enter_phase2 + movq %rsp, %rdi + movl $AUDIT_ARCH_X86_64, %esi + movq %rax, %rdx + call syscall_trace_enter_phase2 /* * Reload registers from stack in case ptrace changed them. @@ -335,15 +255,15 @@ tracesys_phase2: RESTORE_C_REGS_EXCEPT_RAX RESTORE_EXTRA_REGS #if __SYSCALL_MASK == ~0 - cmpq $__NR_syscall_max,%rax + cmpq $__NR_syscall_max, %rax #else - andl $__SYSCALL_MASK,%eax - cmpl $__NR_syscall_max,%eax + andl $__SYSCALL_MASK, %eax + cmpl $__NR_syscall_max, %eax #endif - ja 1f /* return -ENOSYS (already in pt_regs->ax) */ - movq %r10,%rcx /* fixup for C */ - call *sys_call_table(,%rax,8) - movq %rax,RAX(%rsp) + ja 1f /* return -ENOSYS (already in pt_regs->ax) */ + movq %r10, %rcx /* fixup for C */ + call *sys_call_table(, %rax, 8) + movq %rax, RAX(%rsp) 1: /* Use IRET because user could have changed pt_regs->foo */ @@ -355,31 +275,33 @@ GLOBAL(int_ret_from_sys_call) DISABLE_INTERRUPTS(CLBR_NONE) int_ret_from_sys_call_irqs_off: /* jumps come here from the irqs-off SYSRET path */ TRACE_IRQS_OFF - movl $_TIF_ALLWORK_MASK,%edi + movl $_TIF_ALLWORK_MASK, %edi /* edi: mask to check */ GLOBAL(int_with_check) LOCKDEP_SYS_EXIT_IRQ GET_THREAD_INFO(%rcx) - movl TI_flags(%rcx),%edx - andl %edi,%edx - jnz int_careful - andl $~TS_COMPAT,TI_status(%rcx) + movl TI_flags(%rcx), %edx + andl %edi, %edx + jnz int_careful + andl $~TS_COMPAT, TI_status(%rcx) jmp syscall_return - /* Either reschedule or signal or syscall exit tracking needed. */ - /* First do a reschedule test. */ - /* edx: work, edi: workmask */ + /* + * Either reschedule or signal or syscall exit tracking needed. + * First do a reschedule test. + * edx: work, edi: workmask + */ int_careful: - bt $TIF_NEED_RESCHED,%edx - jnc int_very_careful + bt $TIF_NEED_RESCHED, %edx + jnc int_very_careful TRACE_IRQS_ON ENABLE_INTERRUPTS(CLBR_NONE) - pushq_cfi %rdi + pushq %rdi SCHEDULE_USER - popq_cfi %rdi + popq %rdi DISABLE_INTERRUPTS(CLBR_NONE) TRACE_IRQS_OFF - jmp int_with_check + jmp int_with_check /* handle signals and tracing -- both require a full pt_regs */ int_very_careful: @@ -387,27 +309,27 @@ int_very_careful: ENABLE_INTERRUPTS(CLBR_NONE) SAVE_EXTRA_REGS /* Check for syscall exit trace */ - testl $_TIF_WORK_SYSCALL_EXIT,%edx - jz int_signal - pushq_cfi %rdi - leaq 8(%rsp),%rdi # &ptregs -> arg1 - call syscall_trace_leave - popq_cfi %rdi - andl $~(_TIF_WORK_SYSCALL_EXIT|_TIF_SYSCALL_EMU),%edi - jmp int_restore_rest + testl $_TIF_WORK_SYSCALL_EXIT, %edx + jz int_signal + pushq %rdi + leaq 8(%rsp), %rdi /* &ptregs -> arg1 */ + call syscall_trace_leave + popq %rdi + andl $~(_TIF_WORK_SYSCALL_EXIT|_TIF_SYSCALL_EMU), %edi + jmp int_restore_rest int_signal: - testl $_TIF_DO_NOTIFY_MASK,%edx - jz 1f - movq %rsp,%rdi # &ptregs -> arg1 - xorl %esi,%esi # oldset -> arg2 - call do_notify_resume -1: movl $_TIF_WORK_MASK,%edi + testl $_TIF_DO_NOTIFY_MASK, %edx + jz 1f + movq %rsp, %rdi /* &ptregs -> arg1 */ + xorl %esi, %esi /* oldset -> arg2 */ + call do_notify_resume +1: movl $_TIF_WORK_MASK, %edi int_restore_rest: RESTORE_EXTRA_REGS DISABLE_INTERRUPTS(CLBR_NONE) TRACE_IRQS_OFF - jmp int_with_check + jmp int_with_check syscall_return: /* The IRETQ could re-enable interrupts: */ @@ -418,34 +340,37 @@ syscall_return: * Try to use SYSRET instead of IRET if we're returning to * a completely clean 64-bit userspace context. */ - movq RCX(%rsp),%rcx - cmpq %rcx,RIP(%rsp) /* RCX == RIP */ - jne opportunistic_sysret_failed + movq RCX(%rsp), %rcx + movq RIP(%rsp), %r11 + cmpq %rcx, %r11 /* RCX == RIP */ + jne opportunistic_sysret_failed /* * On Intel CPUs, SYSRET with non-canonical RCX/RIP will #GP * in kernel space. This essentially lets the user take over - * the kernel, since userspace controls RSP. It's not worth - * testing for canonicalness exactly -- this check detects any - * of the 17 high bits set, which is true for non-canonical - * or kernel addresses. (This will pessimize vsyscall=native. - * Big deal.) + * the kernel, since userspace controls RSP. * - * If virtual addresses ever become wider, this will need + * If width of "canonical tail" ever becomes variable, this will need * to be updated to remain correct on both old and new CPUs. */ .ifne __VIRTUAL_MASK_SHIFT - 47 .error "virtual address width changed -- SYSRET checks need update" .endif - shr $__VIRTUAL_MASK_SHIFT, %rcx - jnz opportunistic_sysret_failed - cmpq $__USER_CS,CS(%rsp) /* CS must match SYSRET */ - jne opportunistic_sysret_failed + /* Change top 16 bits to be the sign-extension of 47th bit */ + shl $(64 - (__VIRTUAL_MASK_SHIFT+1)), %rcx + sar $(64 - (__VIRTUAL_MASK_SHIFT+1)), %rcx - movq R11(%rsp),%r11 - cmpq %r11,EFLAGS(%rsp) /* R11 == RFLAGS */ - jne opportunistic_sysret_failed + /* If this changed %rcx, it was not canonical */ + cmpq %rcx, %r11 + jne opportunistic_sysret_failed + + cmpq $__USER_CS, CS(%rsp) /* CS must match SYSRET */ + jne opportunistic_sysret_failed + + movq R11(%rsp), %r11 + cmpq %r11, EFLAGS(%rsp) /* R11 == RFLAGS */ + jne opportunistic_sysret_failed /* * SYSRET can't restore RF. SYSRET can restore TF, but unlike IRET, @@ -454,47 +379,41 @@ syscall_return: * with register state that satisfies the opportunistic SYSRET * conditions. For example, single-stepping this user code: * - * movq $stuck_here,%rcx + * movq $stuck_here, %rcx * pushfq * popq %r11 * stuck_here: * * would never get past 'stuck_here'. */ - testq $(X86_EFLAGS_RF|X86_EFLAGS_TF), %r11 - jnz opportunistic_sysret_failed + testq $(X86_EFLAGS_RF|X86_EFLAGS_TF), %r11 + jnz opportunistic_sysret_failed /* nothing to check for RSP */ - cmpq $__USER_DS,SS(%rsp) /* SS must match SYSRET */ - jne opportunistic_sysret_failed + cmpq $__USER_DS, SS(%rsp) /* SS must match SYSRET */ + jne opportunistic_sysret_failed /* - * We win! This label is here just for ease of understanding - * perf profiles. Nothing jumps here. + * We win! This label is here just for ease of understanding + * perf profiles. Nothing jumps here. */ syscall_return_via_sysret: - CFI_REMEMBER_STATE - /* r11 is already restored (see code above) */ - RESTORE_C_REGS_EXCEPT_R11 - movq RSP(%rsp),%rsp + /* rcx and r11 are already restored (see code above) */ + RESTORE_C_REGS_EXCEPT_RCX_R11 + movq RSP(%rsp), %rsp USERGS_SYSRET64 - CFI_RESTORE_STATE opportunistic_sysret_failed: SWAPGS jmp restore_c_regs_and_iret - CFI_ENDPROC -END(system_call) +END(entry_SYSCALL_64) .macro FORK_LIKE func ENTRY(stub_\func) - CFI_STARTPROC - DEFAULT_FRAME 0, 8 /* offset 8: return address */ SAVE_EXTRA_REGS 8 - jmp sys_\func - CFI_ENDPROC + jmp sys_\func END(stub_\func) .endm @@ -503,8 +422,6 @@ END(stub_\func) FORK_LIKE vfork ENTRY(stub_execve) - CFI_STARTPROC - DEFAULT_FRAME 0, 8 call sys_execve return_from_execve: testl %eax, %eax @@ -514,11 +431,9 @@ return_from_execve: 1: /* must use IRET code path (pt_regs->cs may have changed) */ addq $8, %rsp - CFI_ADJUST_CFA_OFFSET -8 ZERO_EXTRA_REGS - movq %rax,RAX(%rsp) + movq %rax, RAX(%rsp) jmp int_ret_from_sys_call - CFI_ENDPROC END(stub_execve) /* * Remaining execve stubs are only 7 bytes long. @@ -526,47 +441,25 @@ END(stub_execve) */ .align 8 GLOBAL(stub_execveat) - CFI_STARTPROC - DEFAULT_FRAME 0, 8 call sys_execveat jmp return_from_execve - CFI_ENDPROC END(stub_execveat) -#ifdef CONFIG_X86_X32_ABI +#if defined(CONFIG_X86_X32_ABI) || defined(CONFIG_IA32_EMULATION) .align 8 GLOBAL(stub_x32_execve) - CFI_STARTPROC - DEFAULT_FRAME 0, 8 - call compat_sys_execve - jmp return_from_execve - CFI_ENDPROC -END(stub_x32_execve) - .align 8 -GLOBAL(stub_x32_execveat) - CFI_STARTPROC - DEFAULT_FRAME 0, 8 - call compat_sys_execveat - jmp return_from_execve - CFI_ENDPROC -END(stub_x32_execveat) -#endif - -#ifdef CONFIG_IA32_EMULATION - .align 8 GLOBAL(stub32_execve) - CFI_STARTPROC call compat_sys_execve jmp return_from_execve - CFI_ENDPROC END(stub32_execve) +END(stub_x32_execve) .align 8 +GLOBAL(stub_x32_execveat) GLOBAL(stub32_execveat) - CFI_STARTPROC call compat_sys_execveat jmp return_from_execve - CFI_ENDPROC END(stub32_execveat) +END(stub_x32_execveat) #endif /* @@ -574,8 +467,6 @@ END(stub32_execveat) * This cannot be done with SYSRET, so use the IRET return path instead. */ ENTRY(stub_rt_sigreturn) - CFI_STARTPROC - DEFAULT_FRAME 0, 8 /* * SAVE_EXTRA_REGS result is not normally needed: * sigreturn overwrites all pt_regs->GPREGS. @@ -584,24 +475,19 @@ ENTRY(stub_rt_sigreturn) * we SAVE_EXTRA_REGS here. */ SAVE_EXTRA_REGS 8 - call sys_rt_sigreturn + call sys_rt_sigreturn return_from_stub: addq $8, %rsp - CFI_ADJUST_CFA_OFFSET -8 RESTORE_EXTRA_REGS - movq %rax,RAX(%rsp) - jmp int_ret_from_sys_call - CFI_ENDPROC + movq %rax, RAX(%rsp) + jmp int_ret_from_sys_call END(stub_rt_sigreturn) #ifdef CONFIG_X86_X32_ABI ENTRY(stub_x32_rt_sigreturn) - CFI_STARTPROC - DEFAULT_FRAME 0, 8 SAVE_EXTRA_REGS 8 - call sys32_x32_rt_sigreturn - jmp return_from_stub - CFI_ENDPROC + call sys32_x32_rt_sigreturn + jmp return_from_stub END(stub_x32_rt_sigreturn) #endif @@ -611,36 +497,36 @@ END(stub_x32_rt_sigreturn) * rdi: prev task we switched from */ ENTRY(ret_from_fork) - DEFAULT_FRAME - LOCK ; btr $TIF_FORK,TI_flags(%r8) + LOCK ; btr $TIF_FORK, TI_flags(%r8) - pushq_cfi $0x0002 - popfq_cfi # reset kernel eflags + pushq $0x0002 + popfq /* reset kernel eflags */ - call schedule_tail # rdi: 'prev' task parameter + call schedule_tail /* rdi: 'prev' task parameter */ RESTORE_EXTRA_REGS - testl $3,CS(%rsp) # from kernel_thread? + testb $3, CS(%rsp) /* from kernel_thread? */ /* * By the time we get here, we have no idea whether our pt_regs, * ti flags, and ti status came from the 64-bit SYSCALL fast path, - * the slow path, or one of the ia32entry paths. + * the slow path, or one of the 32-bit compat paths. * Use IRET code path to return, since it can safely handle * all of the above. */ jnz int_ret_from_sys_call - /* We came from kernel_thread */ - /* nb: we depend on RESTORE_EXTRA_REGS above */ - movq %rbp, %rdi - call *%rbx - movl $0, RAX(%rsp) + /* + * We came from kernel_thread + * nb: we depend on RESTORE_EXTRA_REGS above + */ + movq %rbp, %rdi + call *%rbx + movl $0, RAX(%rsp) RESTORE_EXTRA_REGS - jmp int_ret_from_sys_call - CFI_ENDPROC + jmp int_ret_from_sys_call END(ret_from_fork) /* @@ -649,16 +535,13 @@ END(ret_from_fork) */ .align 8 ENTRY(irq_entries_start) - INTR_FRAME vector=FIRST_EXTERNAL_VECTOR .rept (FIRST_SYSTEM_VECTOR - FIRST_EXTERNAL_VECTOR) - pushq_cfi $(~vector+0x80) /* Note: always in signed byte range */ + pushq $(~vector+0x80) /* Note: always in signed byte range */ vector=vector+1 jmp common_interrupt - CFI_ADJUST_CFA_OFFSET -8 .align 8 .endr - CFI_ENDPROC END(irq_entries_start) /* @@ -684,10 +567,10 @@ END(irq_entries_start) /* this goes to 0(%rsp) for unwinder, not for saving the value: */ SAVE_EXTRA_REGS_RBP -RBP - leaq -RBP(%rsp),%rdi /* arg1 for \func (pointer to pt_regs) */ + leaq -RBP(%rsp), %rdi /* arg1 for \func (pointer to pt_regs) */ - testl $3, CS-RBP(%rsp) - je 1f + testb $3, CS-RBP(%rsp) + jz 1f SWAPGS 1: /* @@ -697,24 +580,14 @@ END(irq_entries_start) * a little cheaper to use a separate counter in the PDA (short of * moving irq_enter into assembly, which would be too much work) */ - movq %rsp, %rsi - incl PER_CPU_VAR(irq_count) - cmovzq PER_CPU_VAR(irq_stack_ptr),%rsp - CFI_DEF_CFA_REGISTER rsi - pushq %rsi - /* - * For debugger: - * "CFA (Current Frame Address) is the value on stack + offset" - */ - CFI_ESCAPE 0x0f /* DW_CFA_def_cfa_expression */, 6, \ - 0x77 /* DW_OP_breg7 (rsp) */, 0, \ - 0x06 /* DW_OP_deref */, \ - 0x08 /* DW_OP_const1u */, SIZEOF_PTREGS-RBP, \ - 0x22 /* DW_OP_plus */ + movq %rsp, %rsi + incl PER_CPU_VAR(irq_count) + cmovzq PER_CPU_VAR(irq_stack_ptr), %rsp + pushq %rsi /* We entered an interrupt context - irqs are off: */ TRACE_IRQS_OFF - call \func + call \func .endm /* @@ -723,42 +596,36 @@ END(irq_entries_start) */ .p2align CONFIG_X86_L1_CACHE_SHIFT common_interrupt: - XCPT_FRAME ASM_CLAC - addq $-0x80,(%rsp) /* Adjust vector to [-256,-1] range */ + addq $-0x80, (%rsp) /* Adjust vector to [-256, -1] range */ interrupt do_IRQ /* 0(%rsp): old RSP */ ret_from_intr: DISABLE_INTERRUPTS(CLBR_NONE) TRACE_IRQS_OFF - decl PER_CPU_VAR(irq_count) + decl PER_CPU_VAR(irq_count) /* Restore saved previous stack */ - popq %rsi - CFI_DEF_CFA rsi,SIZEOF_PTREGS-RBP /* reg/off reset after def_cfa_expr */ + popq %rsi /* return code expects complete pt_regs - adjust rsp accordingly: */ - leaq -RBP(%rsi),%rsp - CFI_DEF_CFA_REGISTER rsp - CFI_ADJUST_CFA_OFFSET RBP + leaq -RBP(%rsi), %rsp - testl $3,CS(%rsp) - je retint_kernel + testb $3, CS(%rsp) + jz retint_kernel /* Interrupt came from user space */ - +retint_user: GET_THREAD_INFO(%rcx) - /* - * %rcx: thread info. Interrupts off. - */ + + /* %rcx: thread info. Interrupts are off. */ retint_with_reschedule: - movl $_TIF_WORK_MASK,%edi + movl $_TIF_WORK_MASK, %edi retint_check: LOCKDEP_SYS_EXIT_IRQ - movl TI_flags(%rcx),%edx - andl %edi,%edx - CFI_REMEMBER_STATE - jnz retint_careful + movl TI_flags(%rcx), %edx + andl %edi, %edx + jnz retint_careful -retint_swapgs: /* return to user-space */ +retint_swapgs: /* return to user-space */ /* * The iretq could re-enable interrupts: */ @@ -773,9 +640,9 @@ retint_kernel: #ifdef CONFIG_PREEMPT /* Interrupts are off */ /* Check if we need preemption */ - bt $9,EFLAGS(%rsp) /* interrupts were off? */ + bt $9, EFLAGS(%rsp) /* were interrupts off? */ jnc 1f -0: cmpl $0,PER_CPU_VAR(__preempt_count) +0: cmpl $0, PER_CPU_VAR(__preempt_count) jnz 1f call preempt_schedule_irq jmp 0b @@ -793,8 +660,6 @@ retint_kernel: restore_c_regs_and_iret: RESTORE_C_REGS REMOVE_PT_GPREGS_FROM_STACK 8 - -irq_return: INTERRUPT_RETURN ENTRY(native_iret) @@ -803,8 +668,8 @@ ENTRY(native_iret) * 64-bit mode SS:RSP on the exception stack is always valid. */ #ifdef CONFIG_X86_ESPFIX64 - testb $4,(SS-RIP)(%rsp) - jnz native_irq_return_ldt + testb $4, (SS-RIP)(%rsp) + jnz native_irq_return_ldt #endif .global native_irq_return_iret @@ -819,62 +684,60 @@ native_irq_return_iret: #ifdef CONFIG_X86_ESPFIX64 native_irq_return_ldt: - pushq_cfi %rax - pushq_cfi %rdi + pushq %rax + pushq %rdi SWAPGS - movq PER_CPU_VAR(espfix_waddr),%rdi - movq %rax,(0*8)(%rdi) /* RAX */ - movq (2*8)(%rsp),%rax /* RIP */ - movq %rax,(1*8)(%rdi) - movq (3*8)(%rsp),%rax /* CS */ - movq %rax,(2*8)(%rdi) - movq (4*8)(%rsp),%rax /* RFLAGS */ - movq %rax,(3*8)(%rdi) - movq (6*8)(%rsp),%rax /* SS */ - movq %rax,(5*8)(%rdi) - movq (5*8)(%rsp),%rax /* RSP */ - movq %rax,(4*8)(%rdi) - andl $0xffff0000,%eax - popq_cfi %rdi - orq PER_CPU_VAR(espfix_stack),%rax + movq PER_CPU_VAR(espfix_waddr), %rdi + movq %rax, (0*8)(%rdi) /* RAX */ + movq (2*8)(%rsp), %rax /* RIP */ + movq %rax, (1*8)(%rdi) + movq (3*8)(%rsp), %rax /* CS */ + movq %rax, (2*8)(%rdi) + movq (4*8)(%rsp), %rax /* RFLAGS */ + movq %rax, (3*8)(%rdi) + movq (6*8)(%rsp), %rax /* SS */ + movq %rax, (5*8)(%rdi) + movq (5*8)(%rsp), %rax /* RSP */ + movq %rax, (4*8)(%rdi) + andl $0xffff0000, %eax + popq %rdi + orq PER_CPU_VAR(espfix_stack), %rax SWAPGS - movq %rax,%rsp - popq_cfi %rax - jmp native_irq_return_iret + movq %rax, %rsp + popq %rax + jmp native_irq_return_iret #endif /* edi: workmask, edx: work */ retint_careful: - CFI_RESTORE_STATE - bt $TIF_NEED_RESCHED,%edx - jnc retint_signal + bt $TIF_NEED_RESCHED, %edx + jnc retint_signal TRACE_IRQS_ON ENABLE_INTERRUPTS(CLBR_NONE) - pushq_cfi %rdi + pushq %rdi SCHEDULE_USER - popq_cfi %rdi + popq %rdi GET_THREAD_INFO(%rcx) DISABLE_INTERRUPTS(CLBR_NONE) TRACE_IRQS_OFF - jmp retint_check + jmp retint_check retint_signal: - testl $_TIF_DO_NOTIFY_MASK,%edx - jz retint_swapgs + testl $_TIF_DO_NOTIFY_MASK, %edx + jz retint_swapgs TRACE_IRQS_ON ENABLE_INTERRUPTS(CLBR_NONE) SAVE_EXTRA_REGS - movq $-1,ORIG_RAX(%rsp) - xorl %esi,%esi # oldset - movq %rsp,%rdi # &pt_regs - call do_notify_resume + movq $-1, ORIG_RAX(%rsp) + xorl %esi, %esi /* oldset */ + movq %rsp, %rdi /* &pt_regs */ + call do_notify_resume RESTORE_EXTRA_REGS DISABLE_INTERRUPTS(CLBR_NONE) TRACE_IRQS_OFF GET_THREAD_INFO(%rcx) - jmp retint_with_reschedule + jmp retint_with_reschedule - CFI_ENDPROC END(common_interrupt) /* @@ -882,13 +745,11 @@ END(common_interrupt) */ .macro apicinterrupt3 num sym do_sym ENTRY(\sym) - INTR_FRAME ASM_CLAC - pushq_cfi $~(\num) + pushq $~(\num) .Lcommon_\sym: interrupt \do_sym - jmp ret_from_intr - CFI_ENDPROC + jmp ret_from_intr END(\sym) .endm @@ -910,53 +771,45 @@ trace_apicinterrupt \num \sym .endm #ifdef CONFIG_SMP -apicinterrupt3 IRQ_MOVE_CLEANUP_VECTOR \ - irq_move_cleanup_interrupt smp_irq_move_cleanup_interrupt -apicinterrupt3 REBOOT_VECTOR \ - reboot_interrupt smp_reboot_interrupt +apicinterrupt3 IRQ_MOVE_CLEANUP_VECTOR irq_move_cleanup_interrupt smp_irq_move_cleanup_interrupt +apicinterrupt3 REBOOT_VECTOR reboot_interrupt smp_reboot_interrupt #endif #ifdef CONFIG_X86_UV -apicinterrupt3 UV_BAU_MESSAGE \ - uv_bau_message_intr1 uv_bau_message_interrupt +apicinterrupt3 UV_BAU_MESSAGE uv_bau_message_intr1 uv_bau_message_interrupt #endif -apicinterrupt LOCAL_TIMER_VECTOR \ - apic_timer_interrupt smp_apic_timer_interrupt -apicinterrupt X86_PLATFORM_IPI_VECTOR \ - x86_platform_ipi smp_x86_platform_ipi + +apicinterrupt LOCAL_TIMER_VECTOR apic_timer_interrupt smp_apic_timer_interrupt +apicinterrupt X86_PLATFORM_IPI_VECTOR x86_platform_ipi smp_x86_platform_ipi #ifdef CONFIG_HAVE_KVM -apicinterrupt3 POSTED_INTR_VECTOR \ - kvm_posted_intr_ipi smp_kvm_posted_intr_ipi +apicinterrupt3 POSTED_INTR_VECTOR kvm_posted_intr_ipi smp_kvm_posted_intr_ipi +apicinterrupt3 POSTED_INTR_WAKEUP_VECTOR kvm_posted_intr_wakeup_ipi smp_kvm_posted_intr_wakeup_ipi #endif #ifdef CONFIG_X86_MCE_THRESHOLD -apicinterrupt THRESHOLD_APIC_VECTOR \ - threshold_interrupt smp_threshold_interrupt +apicinterrupt THRESHOLD_APIC_VECTOR threshold_interrupt smp_threshold_interrupt +#endif + +#ifdef CONFIG_X86_MCE_AMD +apicinterrupt DEFERRED_ERROR_VECTOR deferred_error_interrupt smp_deferred_error_interrupt #endif #ifdef CONFIG_X86_THERMAL_VECTOR -apicinterrupt THERMAL_APIC_VECTOR \ - thermal_interrupt smp_thermal_interrupt +apicinterrupt THERMAL_APIC_VECTOR thermal_interrupt smp_thermal_interrupt #endif #ifdef CONFIG_SMP -apicinterrupt CALL_FUNCTION_SINGLE_VECTOR \ - call_function_single_interrupt smp_call_function_single_interrupt -apicinterrupt CALL_FUNCTION_VECTOR \ - call_function_interrupt smp_call_function_interrupt -apicinterrupt RESCHEDULE_VECTOR \ - reschedule_interrupt smp_reschedule_interrupt +apicinterrupt CALL_FUNCTION_SINGLE_VECTOR call_function_single_interrupt smp_call_function_single_interrupt +apicinterrupt CALL_FUNCTION_VECTOR call_function_interrupt smp_call_function_interrupt +apicinterrupt RESCHEDULE_VECTOR reschedule_interrupt smp_reschedule_interrupt #endif -apicinterrupt ERROR_APIC_VECTOR \ - error_interrupt smp_error_interrupt -apicinterrupt SPURIOUS_APIC_VECTOR \ - spurious_interrupt smp_spurious_interrupt +apicinterrupt ERROR_APIC_VECTOR error_interrupt smp_error_interrupt +apicinterrupt SPURIOUS_APIC_VECTOR spurious_interrupt smp_spurious_interrupt #ifdef CONFIG_IRQ_WORK -apicinterrupt IRQ_WORK_VECTOR \ - irq_work_interrupt smp_irq_work_interrupt +apicinterrupt IRQ_WORK_VECTOR irq_work_interrupt smp_irq_work_interrupt #endif /* @@ -971,100 +824,87 @@ ENTRY(\sym) .error "using shift_ist requires paranoid=1" .endif - .if \has_error_code - XCPT_FRAME - .else - INTR_FRAME - .endif - ASM_CLAC PARAVIRT_ADJUST_EXCEPTION_FRAME .ifeq \has_error_code - pushq_cfi $-1 /* ORIG_RAX: no syscall to restart */ + pushq $-1 /* ORIG_RAX: no syscall to restart */ .endif ALLOC_PT_GPREGS_ON_STACK .if \paranoid .if \paranoid == 1 - CFI_REMEMBER_STATE - testl $3, CS(%rsp) /* If coming from userspace, switch */ - jnz 1f /* stacks. */ + testb $3, CS(%rsp) /* If coming from userspace, switch stacks */ + jnz 1f .endif - call paranoid_entry + call paranoid_entry .else - call error_entry + call error_entry .endif /* returned flag: ebx=0: need swapgs on exit, ebx=1: don't need it */ - DEFAULT_FRAME 0 - .if \paranoid .if \shift_ist != -1 - TRACE_IRQS_OFF_DEBUG /* reload IDT in case of recursion */ + TRACE_IRQS_OFF_DEBUG /* reload IDT in case of recursion */ .else TRACE_IRQS_OFF .endif .endif - movq %rsp,%rdi /* pt_regs pointer */ + movq %rsp, %rdi /* pt_regs pointer */ .if \has_error_code - movq ORIG_RAX(%rsp),%rsi /* get error code */ - movq $-1,ORIG_RAX(%rsp) /* no syscall to restart */ + movq ORIG_RAX(%rsp), %rsi /* get error code */ + movq $-1, ORIG_RAX(%rsp) /* no syscall to restart */ .else - xorl %esi,%esi /* no error code */ + xorl %esi, %esi /* no error code */ .endif .if \shift_ist != -1 - subq $EXCEPTION_STKSZ, CPU_TSS_IST(\shift_ist) + subq $EXCEPTION_STKSZ, CPU_TSS_IST(\shift_ist) .endif - call \do_sym + call \do_sym .if \shift_ist != -1 - addq $EXCEPTION_STKSZ, CPU_TSS_IST(\shift_ist) + addq $EXCEPTION_STKSZ, CPU_TSS_IST(\shift_ist) .endif /* these procedures expect "no swapgs" flag in ebx */ .if \paranoid - jmp paranoid_exit + jmp paranoid_exit .else - jmp error_exit + jmp error_exit .endif .if \paranoid == 1 - CFI_RESTORE_STATE /* * Paranoid entry from userspace. Switch stacks and treat it * as a normal entry. This means that paranoid handlers * run in real process context if user_mode(regs). */ 1: - call error_entry + call error_entry - DEFAULT_FRAME 0 - movq %rsp,%rdi /* pt_regs pointer */ - call sync_regs - movq %rax,%rsp /* switch stack */ + movq %rsp, %rdi /* pt_regs pointer */ + call sync_regs + movq %rax, %rsp /* switch stack */ - movq %rsp,%rdi /* pt_regs pointer */ + movq %rsp, %rdi /* pt_regs pointer */ .if \has_error_code - movq ORIG_RAX(%rsp),%rsi /* get error code */ - movq $-1,ORIG_RAX(%rsp) /* no syscall to restart */ + movq ORIG_RAX(%rsp), %rsi /* get error code */ + movq $-1, ORIG_RAX(%rsp) /* no syscall to restart */ .else - xorl %esi,%esi /* no error code */ + xorl %esi, %esi /* no error code */ .endif - call \do_sym + call \do_sym - jmp error_exit /* %ebx: no swapgs flag */ + jmp error_exit /* %ebx: no swapgs flag */ .endif - - CFI_ENDPROC END(\sym) .endm @@ -1079,65 +919,58 @@ idtentry \sym \do_sym has_error_code=\has_error_code .endm #endif -idtentry divide_error do_divide_error has_error_code=0 -idtentry overflow do_overflow has_error_code=0 -idtentry bounds do_bounds has_error_code=0 -idtentry invalid_op do_invalid_op has_error_code=0 -idtentry device_not_available do_device_not_available has_error_code=0 -idtentry double_fault do_double_fault has_error_code=1 paranoid=2 -idtentry coprocessor_segment_overrun do_coprocessor_segment_overrun has_error_code=0 -idtentry invalid_TSS do_invalid_TSS has_error_code=1 -idtentry segment_not_present do_segment_not_present has_error_code=1 -idtentry spurious_interrupt_bug do_spurious_interrupt_bug has_error_code=0 -idtentry coprocessor_error do_coprocessor_error has_error_code=0 -idtentry alignment_check do_alignment_check has_error_code=1 -idtentry simd_coprocessor_error do_simd_coprocessor_error has_error_code=0 - - - /* Reload gs selector with exception handling */ - /* edi: new selector */ +idtentry divide_error do_divide_error has_error_code=0 +idtentry overflow do_overflow has_error_code=0 +idtentry bounds do_bounds has_error_code=0 +idtentry invalid_op do_invalid_op has_error_code=0 +idtentry device_not_available do_device_not_available has_error_code=0 +idtentry double_fault do_double_fault has_error_code=1 paranoid=2 +idtentry coprocessor_segment_overrun do_coprocessor_segment_overrun has_error_code=0 +idtentry invalid_TSS do_invalid_TSS has_error_code=1 +idtentry segment_not_present do_segment_not_present has_error_code=1 +idtentry spurious_interrupt_bug do_spurious_interrupt_bug has_error_code=0 +idtentry coprocessor_error do_coprocessor_error has_error_code=0 +idtentry alignment_check do_alignment_check has_error_code=1 +idtentry simd_coprocessor_error do_simd_coprocessor_error has_error_code=0 + + + /* + * Reload gs selector with exception handling + * edi: new selector + */ ENTRY(native_load_gs_index) - CFI_STARTPROC - pushfq_cfi + pushfq DISABLE_INTERRUPTS(CLBR_ANY & ~CLBR_RDI) SWAPGS gs_change: - movl %edi,%gs -2: mfence /* workaround */ + movl %edi, %gs +2: mfence /* workaround */ SWAPGS - popfq_cfi + popfq ret - CFI_ENDPROC END(native_load_gs_index) - _ASM_EXTABLE(gs_change,bad_gs) - .section .fixup,"ax" + _ASM_EXTABLE(gs_change, bad_gs) + .section .fixup, "ax" /* running with kernelgs */ bad_gs: - SWAPGS /* switch back to user gs */ - xorl %eax,%eax - movl %eax,%gs - jmp 2b + SWAPGS /* switch back to user gs */ + xorl %eax, %eax + movl %eax, %gs + jmp 2b .previous /* Call softirq on interrupt stack. Interrupts are off. */ ENTRY(do_softirq_own_stack) - CFI_STARTPROC - pushq_cfi %rbp - CFI_REL_OFFSET rbp,0 - mov %rsp,%rbp - CFI_DEF_CFA_REGISTER rbp - incl PER_CPU_VAR(irq_count) - cmove PER_CPU_VAR(irq_stack_ptr),%rsp - push %rbp # backlink for old unwinder - call __do_softirq + pushq %rbp + mov %rsp, %rbp + incl PER_CPU_VAR(irq_count) + cmove PER_CPU_VAR(irq_stack_ptr), %rsp + push %rbp /* frame pointer backlink */ + call __do_softirq leaveq - CFI_RESTORE rbp - CFI_DEF_CFA_REGISTER rsp - CFI_ADJUST_CFA_OFFSET -8 - decl PER_CPU_VAR(irq_count) + decl PER_CPU_VAR(irq_count) ret - CFI_ENDPROC END(do_softirq_own_stack) #ifdef CONFIG_XEN @@ -1156,29 +989,24 @@ idtentry xen_hypervisor_callback xen_do_hypervisor_callback has_error_code=0 * existing activation in its critical region -- if so, we pop the current * activation and restart the handler using the previous one. */ -ENTRY(xen_do_hypervisor_callback) # do_hypervisor_callback(struct *pt_regs) - CFI_STARTPROC +ENTRY(xen_do_hypervisor_callback) /* do_hypervisor_callback(struct *pt_regs) */ + /* * Since we don't modify %rdi, evtchn_do_upall(struct *pt_regs) will * see the correct pointer to the pt_regs */ - movq %rdi, %rsp # we don't return, adjust the stack frame - CFI_ENDPROC - DEFAULT_FRAME -11: incl PER_CPU_VAR(irq_count) - movq %rsp,%rbp - CFI_DEF_CFA_REGISTER rbp - cmovzq PER_CPU_VAR(irq_stack_ptr),%rsp - pushq %rbp # backlink for old unwinder - call xen_evtchn_do_upcall - popq %rsp - CFI_DEF_CFA_REGISTER rsp - decl PER_CPU_VAR(irq_count) + movq %rdi, %rsp /* we don't return, adjust the stack frame */ +11: incl PER_CPU_VAR(irq_count) + movq %rsp, %rbp + cmovzq PER_CPU_VAR(irq_stack_ptr), %rsp + pushq %rbp /* frame pointer backlink */ + call xen_evtchn_do_upcall + popq %rsp + decl PER_CPU_VAR(irq_count) #ifndef CONFIG_PREEMPT - call xen_maybe_preempt_hcall + call xen_maybe_preempt_hcall #endif - jmp error_exit - CFI_ENDPROC + jmp error_exit END(xen_do_hypervisor_callback) /* @@ -1195,51 +1023,35 @@ END(xen_do_hypervisor_callback) * with its current contents: any discrepancy means we in category 1. */ ENTRY(xen_failsafe_callback) - INTR_FRAME 1 (6*8) - /*CFI_REL_OFFSET gs,GS*/ - /*CFI_REL_OFFSET fs,FS*/ - /*CFI_REL_OFFSET es,ES*/ - /*CFI_REL_OFFSET ds,DS*/ - CFI_REL_OFFSET r11,8 - CFI_REL_OFFSET rcx,0 - movw %ds,%cx - cmpw %cx,0x10(%rsp) - CFI_REMEMBER_STATE - jne 1f - movw %es,%cx - cmpw %cx,0x18(%rsp) - jne 1f - movw %fs,%cx - cmpw %cx,0x20(%rsp) - jne 1f - movw %gs,%cx - cmpw %cx,0x28(%rsp) - jne 1f + movl %ds, %ecx + cmpw %cx, 0x10(%rsp) + jne 1f + movl %es, %ecx + cmpw %cx, 0x18(%rsp) + jne 1f + movl %fs, %ecx + cmpw %cx, 0x20(%rsp) + jne 1f + movl %gs, %ecx + cmpw %cx, 0x28(%rsp) + jne 1f /* All segments match their saved values => Category 2 (Bad IRET). */ - movq (%rsp),%rcx - CFI_RESTORE rcx - movq 8(%rsp),%r11 - CFI_RESTORE r11 - addq $0x30,%rsp - CFI_ADJUST_CFA_OFFSET -0x30 - pushq_cfi $0 /* RIP */ - pushq_cfi %r11 - pushq_cfi %rcx - jmp general_protection - CFI_RESTORE_STATE + movq (%rsp), %rcx + movq 8(%rsp), %r11 + addq $0x30, %rsp + pushq $0 /* RIP */ + pushq %r11 + pushq %rcx + jmp general_protection 1: /* Segment mismatch => Category 1 (Bad segment). Retry the IRET. */ - movq (%rsp),%rcx - CFI_RESTORE rcx - movq 8(%rsp),%r11 - CFI_RESTORE r11 - addq $0x30,%rsp - CFI_ADJUST_CFA_OFFSET -0x30 - pushq_cfi $-1 /* orig_ax = -1 => not a system call */ + movq (%rsp), %rcx + movq 8(%rsp), %r11 + addq $0x30, %rsp + pushq $-1 /* orig_ax = -1 => not a system call */ ALLOC_PT_GPREGS_ON_STACK SAVE_C_REGS SAVE_EXTRA_REGS - jmp error_exit - CFI_ENDPROC + jmp error_exit END(xen_failsafe_callback) apicinterrupt3 HYPERVISOR_CALLBACK_VECTOR \ @@ -1252,21 +1064,25 @@ apicinterrupt3 HYPERVISOR_CALLBACK_VECTOR \ hyperv_callback_vector hyperv_vector_handler #endif /* CONFIG_HYPERV */ -idtentry debug do_debug has_error_code=0 paranoid=1 shift_ist=DEBUG_STACK -idtentry int3 do_int3 has_error_code=0 paranoid=1 shift_ist=DEBUG_STACK -idtentry stack_segment do_stack_segment has_error_code=1 +idtentry debug do_debug has_error_code=0 paranoid=1 shift_ist=DEBUG_STACK +idtentry int3 do_int3 has_error_code=0 paranoid=1 shift_ist=DEBUG_STACK +idtentry stack_segment do_stack_segment has_error_code=1 + #ifdef CONFIG_XEN -idtentry xen_debug do_debug has_error_code=0 -idtentry xen_int3 do_int3 has_error_code=0 -idtentry xen_stack_segment do_stack_segment has_error_code=1 +idtentry xen_debug do_debug has_error_code=0 +idtentry xen_int3 do_int3 has_error_code=0 +idtentry xen_stack_segment do_stack_segment has_error_code=1 #endif -idtentry general_protection do_general_protection has_error_code=1 -trace_idtentry page_fault do_page_fault has_error_code=1 + +idtentry general_protection do_general_protection has_error_code=1 +trace_idtentry page_fault do_page_fault has_error_code=1 + #ifdef CONFIG_KVM_GUEST -idtentry async_page_fault do_async_page_fault has_error_code=1 +idtentry async_page_fault do_async_page_fault has_error_code=1 #endif + #ifdef CONFIG_X86_MCE -idtentry machine_check has_error_code=0 paranoid=1 do_sym=*machine_check_vector(%rip) +idtentry machine_check has_error_code=0 paranoid=1 do_sym=*machine_check_vector(%rip) #endif /* @@ -1275,19 +1091,17 @@ idtentry machine_check has_error_code=0 paranoid=1 do_sym=*machine_check_vector( * Return: ebx=0: need swapgs on exit, ebx=1: otherwise */ ENTRY(paranoid_entry) - XCPT_FRAME 1 15*8 cld SAVE_C_REGS 8 SAVE_EXTRA_REGS 8 - movl $1,%ebx - movl $MSR_GS_BASE,%ecx + movl $1, %ebx + movl $MSR_GS_BASE, %ecx rdmsr - testl %edx,%edx - js 1f /* negative -> in kernel */ + testl %edx, %edx + js 1f /* negative -> in kernel */ SWAPGS - xorl %ebx,%ebx + xorl %ebx, %ebx 1: ret - CFI_ENDPROC END(paranoid_entry) /* @@ -1299,17 +1113,17 @@ END(paranoid_entry) * in syscall entry), so checking for preemption here would * be complicated. Fortunately, we there's no good reason * to try to handle preemption here. + * + * On entry, ebx is "no swapgs" flag (1: don't need swapgs, 0: need it) */ -/* On entry, ebx is "no swapgs" flag (1: don't need swapgs, 0: need it) */ ENTRY(paranoid_exit) - DEFAULT_FRAME DISABLE_INTERRUPTS(CLBR_NONE) TRACE_IRQS_OFF_DEBUG - testl %ebx,%ebx /* swapgs needed? */ - jnz paranoid_exit_no_swapgs + testl %ebx, %ebx /* swapgs needed? */ + jnz paranoid_exit_no_swapgs TRACE_IRQS_IRETQ SWAPGS_UNSAFE_STACK - jmp paranoid_exit_restore + jmp paranoid_exit_restore paranoid_exit_no_swapgs: TRACE_IRQS_IRETQ_DEBUG paranoid_exit_restore: @@ -1317,24 +1131,24 @@ paranoid_exit_restore: RESTORE_C_REGS REMOVE_PT_GPREGS_FROM_STACK 8 INTERRUPT_RETURN - CFI_ENDPROC END(paranoid_exit) /* * Save all registers in pt_regs, and switch gs if needed. - * Return: ebx=0: need swapgs on exit, ebx=1: otherwise + * Return: EBX=0: came from user mode; EBX=1: otherwise */ ENTRY(error_entry) - XCPT_FRAME 1 15*8 cld SAVE_C_REGS 8 SAVE_EXTRA_REGS 8 - xorl %ebx,%ebx - testl $3,CS+8(%rsp) - je error_kernelspace -error_swapgs: + xorl %ebx, %ebx + testb $3, CS+8(%rsp) + jz error_kernelspace + + /* We entered from user mode */ SWAPGS -error_sti: + +error_entry_done: TRACE_IRQS_OFF ret @@ -1345,56 +1159,66 @@ error_sti: * for these here too. */ error_kernelspace: - CFI_REL_OFFSET rcx, RCX+8 - incl %ebx - leaq native_irq_return_iret(%rip),%rcx - cmpq %rcx,RIP+8(%rsp) - je error_bad_iret - movl %ecx,%eax /* zero extend */ - cmpq %rax,RIP+8(%rsp) - je bstep_iret - cmpq $gs_change,RIP+8(%rsp) - je error_swapgs - jmp error_sti + incl %ebx + leaq native_irq_return_iret(%rip), %rcx + cmpq %rcx, RIP+8(%rsp) + je error_bad_iret + movl %ecx, %eax /* zero extend */ + cmpq %rax, RIP+8(%rsp) + je bstep_iret + cmpq $gs_change, RIP+8(%rsp) + jne error_entry_done + + /* + * hack: gs_change can fail with user gsbase. If this happens, fix up + * gsbase and proceed. We'll fix up the exception and land in + * gs_change's error handler with kernel gsbase. + */ + SWAPGS + jmp error_entry_done bstep_iret: /* Fix truncated RIP */ - movq %rcx,RIP+8(%rsp) + movq %rcx, RIP+8(%rsp) /* fall through */ error_bad_iret: + /* + * We came from an IRET to user mode, so we have user gsbase. + * Switch to kernel gsbase: + */ SWAPGS - mov %rsp,%rdi - call fixup_bad_iret - mov %rax,%rsp - decl %ebx /* Return to usergs */ - jmp error_sti - CFI_ENDPROC + + /* + * Pretend that the exception came from user mode: set up pt_regs + * as if we faulted immediately after IRET and clear EBX so that + * error_exit knows that we will be returning to user mode. + */ + mov %rsp, %rdi + call fixup_bad_iret + mov %rax, %rsp + decl %ebx + jmp error_entry_done END(error_entry) -/* On entry, ebx is "no swapgs" flag (1: don't need swapgs, 0: need it) */ +/* + * On entry, EBS is a "return to kernel mode" flag: + * 1: already in kernel mode, don't need SWAPGS + * 0: user gsbase is loaded, we need SWAPGS and standard preparation for return to usermode + */ ENTRY(error_exit) - DEFAULT_FRAME - movl %ebx,%eax + movl %ebx, %eax RESTORE_EXTRA_REGS DISABLE_INTERRUPTS(CLBR_NONE) TRACE_IRQS_OFF - GET_THREAD_INFO(%rcx) - testl %eax,%eax - jne retint_kernel - LOCKDEP_SYS_EXIT_IRQ - movl TI_flags(%rcx),%edx - movl $_TIF_WORK_MASK,%edi - andl %edi,%edx - jnz retint_careful - jmp retint_swapgs - CFI_ENDPROC + testl %eax, %eax + jnz retint_kernel + jmp retint_user END(error_exit) /* Runs on exception stack */ ENTRY(nmi) - INTR_FRAME PARAVIRT_ADJUST_EXCEPTION_FRAME /* * We allow breakpoints in NMIs. If a breakpoint occurs, then @@ -1429,22 +1253,21 @@ ENTRY(nmi) */ /* Use %rdx as our temp variable throughout */ - pushq_cfi %rdx - CFI_REL_OFFSET rdx, 0 + pushq %rdx /* * If %cs was not the kernel segment, then the NMI triggered in user * space, which means it is definitely not nested. */ - cmpl $__KERNEL_CS, 16(%rsp) - jne first_nmi + cmpl $__KERNEL_CS, 16(%rsp) + jne first_nmi /* * Check the special variable on the stack to see if NMIs are * executing. */ - cmpl $1, -8(%rsp) - je nested_nmi + cmpl $1, -8(%rsp) + je nested_nmi /* * Now test if the previous stack was an NMI stack. @@ -1458,51 +1281,46 @@ ENTRY(nmi) cmpq %rdx, 4*8(%rsp) /* If the stack pointer is above the NMI stack, this is a normal NMI */ ja first_nmi + subq $EXCEPTION_STKSZ, %rdx cmpq %rdx, 4*8(%rsp) /* If it is below the NMI stack, it is a normal NMI */ jb first_nmi /* Ah, it is within the NMI stack, treat it as nested */ - CFI_REMEMBER_STATE - nested_nmi: /* * Do nothing if we interrupted the fixup in repeat_nmi. * It's about to repeat the NMI handler, so we are fine * with ignoring this one. */ - movq $repeat_nmi, %rdx - cmpq 8(%rsp), %rdx - ja 1f - movq $end_repeat_nmi, %rdx - cmpq 8(%rsp), %rdx - ja nested_nmi_out + movq $repeat_nmi, %rdx + cmpq 8(%rsp), %rdx + ja 1f + movq $end_repeat_nmi, %rdx + cmpq 8(%rsp), %rdx + ja nested_nmi_out 1: /* Set up the interrupted NMIs stack to jump to repeat_nmi */ - leaq -1*8(%rsp), %rdx - movq %rdx, %rsp - CFI_ADJUST_CFA_OFFSET 1*8 - leaq -10*8(%rsp), %rdx - pushq_cfi $__KERNEL_DS - pushq_cfi %rdx - pushfq_cfi - pushq_cfi $__KERNEL_CS - pushq_cfi $repeat_nmi + leaq -1*8(%rsp), %rdx + movq %rdx, %rsp + leaq -10*8(%rsp), %rdx + pushq $__KERNEL_DS + pushq %rdx + pushfq + pushq $__KERNEL_CS + pushq $repeat_nmi /* Put stack back */ - addq $(6*8), %rsp - CFI_ADJUST_CFA_OFFSET -6*8 + addq $(6*8), %rsp nested_nmi_out: - popq_cfi %rdx - CFI_RESTORE rdx + popq %rdx /* No need to check faults here */ INTERRUPT_RETURN - CFI_RESTORE_STATE first_nmi: /* * Because nested NMIs will use the pushed location that we @@ -1540,23 +1358,18 @@ first_nmi: * is also used by nested NMIs and can not be trusted on exit. */ /* Do not pop rdx, nested NMIs will corrupt that part of the stack */ - movq (%rsp), %rdx - CFI_RESTORE rdx + movq (%rsp), %rdx /* Set the NMI executing variable on the stack. */ - pushq_cfi $1 + pushq $1 - /* - * Leave room for the "copied" frame - */ - subq $(5*8), %rsp - CFI_ADJUST_CFA_OFFSET 5*8 + /* Leave room for the "copied" frame */ + subq $(5*8), %rsp /* Copy the stack frame to the Saved frame */ .rept 5 - pushq_cfi 11*8(%rsp) + pushq 11*8(%rsp) .endr - CFI_DEF_CFA_OFFSET 5*8 /* Everything up to here is safe from nested NMIs */ @@ -1575,16 +1388,14 @@ repeat_nmi: * is benign for the non-repeat case, where 1 was pushed just above * to this very stack slot). */ - movq $1, 10*8(%rsp) + movq $1, 10*8(%rsp) /* Make another copy, this one may be modified by nested NMIs */ - addq $(10*8), %rsp - CFI_ADJUST_CFA_OFFSET -10*8 + addq $(10*8), %rsp .rept 5 - pushq_cfi -6*8(%rsp) + pushq -6*8(%rsp) .endr - subq $(5*8), %rsp - CFI_DEF_CFA_OFFSET 5*8 + subq $(5*8), %rsp end_repeat_nmi: /* @@ -1592,7 +1403,7 @@ end_repeat_nmi: * NMI if the first NMI took an exception and reset our iret stack * so that we repeat another NMI. */ - pushq_cfi $-1 /* ORIG_RAX: no syscall to restart */ + pushq $-1 /* ORIG_RAX: no syscall to restart */ ALLOC_PT_GPREGS_ON_STACK /* @@ -1602,8 +1413,7 @@ end_repeat_nmi: * setting NEED_RESCHED or anything that normal interrupts and * exceptions might do. */ - call paranoid_entry - DEFAULT_FRAME 0 + call paranoid_entry /* * Save off the CR2 register. If we take a page fault in the NMI then @@ -1614,22 +1424,21 @@ end_repeat_nmi: * origin fault. Save it off and restore it if it changes. * Use the r12 callee-saved register. */ - movq %cr2, %r12 + movq %cr2, %r12 /* paranoidentry do_nmi, 0; without TRACE_IRQS_OFF */ - movq %rsp,%rdi - movq $-1,%rsi - call do_nmi + movq %rsp, %rdi + movq $-1, %rsi + call do_nmi /* Did the NMI take a page fault? Restore cr2 if it did */ - movq %cr2, %rcx - cmpq %rcx, %r12 - je 1f - movq %r12, %cr2 + movq %cr2, %rcx + cmpq %rcx, %r12 + je 1f + movq %r12, %cr2 1: - - testl %ebx,%ebx /* swapgs needed? */ - jnz nmi_restore + testl %ebx, %ebx /* swapgs needed? */ + jnz nmi_restore nmi_swapgs: SWAPGS_UNSAFE_STACK nmi_restore: @@ -1639,15 +1448,11 @@ nmi_restore: REMOVE_PT_GPREGS_FROM_STACK 6*8 /* Clear the NMI executing stack variable */ - movq $0, 5*8(%rsp) - jmp irq_return - CFI_ENDPROC + movq $0, 5*8(%rsp) + INTERRUPT_RETURN END(nmi) ENTRY(ignore_sysret) - CFI_STARTPROC - mov $-ENOSYS,%eax + mov $-ENOSYS, %eax sysret - CFI_ENDPROC END(ignore_sysret) - diff --git a/arch/x86/entry/entry_64_compat.S b/arch/x86/entry/entry_64_compat.S new file mode 100644 index 0000000..bb187a6 --- /dev/null +++ b/arch/x86/entry/entry_64_compat.S @@ -0,0 +1,556 @@ +/* + * Compatibility mode system call entry point for x86-64. + * + * Copyright 2000-2002 Andi Kleen, SuSE Labs. + */ +#include "calling.h" +#include <asm/asm-offsets.h> +#include <asm/current.h> +#include <asm/errno.h> +#include <asm/ia32_unistd.h> +#include <asm/thread_info.h> +#include <asm/segment.h> +#include <asm/irqflags.h> +#include <asm/asm.h> +#include <asm/smap.h> +#include <linux/linkage.h> +#include <linux/err.h> + +/* Avoid __ASSEMBLER__'ifying <linux/audit.h> just for this. */ +#include <linux/elf-em.h> +#define AUDIT_ARCH_I386 (EM_386|__AUDIT_ARCH_LE) +#define __AUDIT_ARCH_LE 0x40000000 + +#ifndef CONFIG_AUDITSYSCALL +# define sysexit_audit ia32_ret_from_sys_call +# define sysretl_audit ia32_ret_from_sys_call +#endif + + .section .entry.text, "ax" + +#ifdef CONFIG_PARAVIRT +ENTRY(native_usergs_sysret32) + swapgs + sysretl +ENDPROC(native_usergs_sysret32) +#endif + +/* + * 32-bit SYSENTER instruction entry. + * + * SYSENTER loads ss, rsp, cs, and rip from previously programmed MSRs. + * IF and VM in rflags are cleared (IOW: interrupts are off). + * SYSENTER does not save anything on the stack, + * and does not save old rip (!!!) and rflags. + * + * Arguments: + * eax system call number + * ebx arg1 + * ecx arg2 + * edx arg3 + * esi arg4 + * edi arg5 + * ebp user stack + * 0(%ebp) arg6 + * + * This is purely a fast path. For anything complicated we use the int 0x80 + * path below. We set up a complete hardware stack frame to share code + * with the int 0x80 path. + */ +ENTRY(entry_SYSENTER_compat) + /* + * Interrupts are off on entry. + * We do not frame this tiny irq-off block with TRACE_IRQS_OFF/ON, + * it is too small to ever cause noticeable irq latency. + */ + SWAPGS_UNSAFE_STACK + movq PER_CPU_VAR(cpu_current_top_of_stack), %rsp + ENABLE_INTERRUPTS(CLBR_NONE) + + /* Zero-extending 32-bit regs, do not remove */ + movl %ebp, %ebp + movl %eax, %eax + + movl ASM_THREAD_INFO(TI_sysenter_return, %rsp, 0), %r10d + + /* Construct struct pt_regs on stack */ + pushq $__USER32_DS /* pt_regs->ss */ + pushq %rbp /* pt_regs->sp */ + pushfq /* pt_regs->flags */ + pushq $__USER32_CS /* pt_regs->cs */ + pushq %r10 /* pt_regs->ip = thread_info->sysenter_return */ + pushq %rax /* pt_regs->orig_ax */ + pushq %rdi /* pt_regs->di */ + pushq %rsi /* pt_regs->si */ + pushq %rdx /* pt_regs->dx */ + pushq %rcx /* pt_regs->cx */ + pushq $-ENOSYS /* pt_regs->ax */ + cld + sub $(10*8), %rsp /* pt_regs->r8-11, bp, bx, r12-15 not saved */ + + /* + * no need to do an access_ok check here because rbp has been + * 32-bit zero extended + */ + ASM_STAC +1: movl (%rbp), %ebp + _ASM_EXTABLE(1b, ia32_badarg) + ASM_CLAC + + /* + * Sysenter doesn't filter flags, so we need to clear NT + * ourselves. To save a few cycles, we can check whether + * NT was set instead of doing an unconditional popfq. + */ + testl $X86_EFLAGS_NT, EFLAGS(%rsp) + jnz sysenter_fix_flags +sysenter_flags_fixed: + + orl $TS_COMPAT, ASM_THREAD_INFO(TI_status, %rsp, SIZEOF_PTREGS) + testl $_TIF_WORK_SYSCALL_ENTRY, ASM_THREAD_INFO(TI_flags, %rsp, SIZEOF_PTREGS) + jnz sysenter_tracesys + +sysenter_do_call: + /* 32-bit syscall -> 64-bit C ABI argument conversion */ + movl %edi, %r8d /* arg5 */ + movl %ebp, %r9d /* arg6 */ + xchg %ecx, %esi /* rsi:arg2, rcx:arg4 */ + movl %ebx, %edi /* arg1 */ + movl %edx, %edx /* arg3 (zero extension) */ +sysenter_dispatch: + cmpq $(IA32_NR_syscalls-1), %rax + ja 1f + call *ia32_sys_call_table(, %rax, 8) + movq %rax, RAX(%rsp) +1: + DISABLE_INTERRUPTS(CLBR_NONE) + TRACE_IRQS_OFF + testl $_TIF_ALLWORK_MASK, ASM_THREAD_INFO(TI_flags, %rsp, SIZEOF_PTREGS) + jnz sysexit_audit +sysexit_from_sys_call: + /* + * NB: SYSEXIT is not obviously safe for 64-bit kernels -- an + * NMI between STI and SYSEXIT has poorly specified behavior, + * and and NMI followed by an IRQ with usergs is fatal. So + * we just pretend we're using SYSEXIT but we really use + * SYSRETL instead. + * + * This code path is still called 'sysexit' because it pairs + * with 'sysenter' and it uses the SYSENTER calling convention. + */ + andl $~TS_COMPAT, ASM_THREAD_INFO(TI_status, %rsp, SIZEOF_PTREGS) + movl RIP(%rsp), %ecx /* User %eip */ + RESTORE_RSI_RDI + xorl %edx, %edx /* Do not leak kernel information */ + xorq %r8, %r8 + xorq %r9, %r9 + xorq %r10, %r10 + movl EFLAGS(%rsp), %r11d /* User eflags */ + TRACE_IRQS_ON + + /* + * SYSRETL works even on Intel CPUs. Use it in preference to SYSEXIT, + * since it avoids a dicey window with interrupts enabled. + */ + movl RSP(%rsp), %esp + + /* + * USERGS_SYSRET32 does: + * gsbase = user's gs base + * eip = ecx + * rflags = r11 + * cs = __USER32_CS + * ss = __USER_DS + * + * The prologue set RIP(%rsp) to VDSO32_SYSENTER_RETURN, which does: + * + * pop %ebp + * pop %edx + * pop %ecx + * + * Therefore, we invoke SYSRETL with EDX and R8-R10 zeroed to + * avoid info leaks. R11 ends up with VDSO32_SYSENTER_RETURN's + * address (already known to user code), and R12-R15 are + * callee-saved and therefore don't contain any interesting + * kernel data. + */ + USERGS_SYSRET32 + +#ifdef CONFIG_AUDITSYSCALL + .macro auditsys_entry_common + /* + * At this point, registers hold syscall args in the 32-bit syscall ABI: + * EAX is syscall number, the 6 args are in EBX,ECX,EDX,ESI,EDI,EBP. + * + * We want to pass them to __audit_syscall_entry(), which is a 64-bit + * C function with 5 parameters, so shuffle them to match what + * the function expects: RDI,RSI,RDX,RCX,R8. + */ + movl %esi, %r8d /* arg5 (R8 ) <= 4th syscall arg (ESI) */ + xchg %ecx, %edx /* arg4 (RCX) <= 3rd syscall arg (EDX) */ + /* arg3 (RDX) <= 2nd syscall arg (ECX) */ + movl %ebx, %esi /* arg2 (RSI) <= 1st syscall arg (EBX) */ + movl %eax, %edi /* arg1 (RDI) <= syscall number (EAX) */ + call __audit_syscall_entry + + /* + * We are going to jump back to the syscall dispatch code. + * Prepare syscall args as required by the 64-bit C ABI. + * Registers clobbered by __audit_syscall_entry() are + * loaded from pt_regs on stack: + */ + movl ORIG_RAX(%rsp), %eax /* syscall number */ + movl %ebx, %edi /* arg1 */ + movl RCX(%rsp), %esi /* arg2 */ + movl RDX(%rsp), %edx /* arg3 */ + movl RSI(%rsp), %ecx /* arg4 */ + movl RDI(%rsp), %r8d /* arg5 */ + movl %ebp, %r9d /* arg6 */ + .endm + + .macro auditsys_exit exit + testl $(_TIF_ALLWORK_MASK & ~_TIF_SYSCALL_AUDIT), ASM_THREAD_INFO(TI_flags, %rsp, SIZEOF_PTREGS) + jnz ia32_ret_from_sys_call + TRACE_IRQS_ON + ENABLE_INTERRUPTS(CLBR_NONE) + movl %eax, %esi /* second arg, syscall return value */ + cmpl $-MAX_ERRNO, %eax /* is it an error ? */ + jbe 1f + movslq %eax, %rsi /* if error sign extend to 64 bits */ +1: setbe %al /* 1 if error, 0 if not */ + movzbl %al, %edi /* zero-extend that into %edi */ + call __audit_syscall_exit + movq RAX(%rsp), %rax /* reload syscall return value */ + movl $(_TIF_ALLWORK_MASK & ~_TIF_SYSCALL_AUDIT), %edi + DISABLE_INTERRUPTS(CLBR_NONE) + TRACE_IRQS_OFF + testl %edi, ASM_THREAD_INFO(TI_flags, %rsp, SIZEOF_PTREGS) + jz \exit + xorl %eax, %eax /* Do not leak kernel information */ + movq %rax, R11(%rsp) + movq %rax, R10(%rsp) + movq %rax, R9(%rsp) + movq %rax, R8(%rsp) + jmp int_with_check + .endm + +sysenter_auditsys: + auditsys_entry_common + jmp sysenter_dispatch + +sysexit_audit: + auditsys_exit sysexit_from_sys_call +#endif + +sysenter_fix_flags: + pushq $(X86_EFLAGS_IF|X86_EFLAGS_FIXED) + popfq + jmp sysenter_flags_fixed + +sysenter_tracesys: +#ifdef CONFIG_AUDITSYSCALL + testl $(_TIF_WORK_SYSCALL_ENTRY & ~_TIF_SYSCALL_AUDIT), ASM_THREAD_INFO(TI_flags, %rsp, SIZEOF_PTREGS) + jz sysenter_auditsys +#endif + SAVE_EXTRA_REGS + xorl %eax, %eax /* Do not leak kernel information */ + movq %rax, R11(%rsp) + movq %rax, R10(%rsp) + movq %rax, R9(%rsp) + movq %rax, R8(%rsp) + movq %rsp, %rdi /* &pt_regs -> arg1 */ + call syscall_trace_enter + + /* Reload arg registers from stack. (see sysenter_tracesys) */ + movl RCX(%rsp), %ecx + movl RDX(%rsp), %edx + movl RSI(%rsp), %esi + movl RDI(%rsp), %edi + movl %eax, %eax /* zero extension */ + + RESTORE_EXTRA_REGS + jmp sysenter_do_call +ENDPROC(entry_SYSENTER_compat) + +/* + * 32-bit SYSCALL instruction entry. + * + * 32-bit SYSCALL saves rip to rcx, clears rflags.RF, then saves rflags to r11, + * then loads new ss, cs, and rip from previously programmed MSRs. + * rflags gets masked by a value from another MSR (so CLD and CLAC + * are not needed). SYSCALL does not save anything on the stack + * and does not change rsp. + * + * Note: rflags saving+masking-with-MSR happens only in Long mode + * (in legacy 32-bit mode, IF, RF and VM bits are cleared and that's it). + * Don't get confused: rflags saving+masking depends on Long Mode Active bit + * (EFER.LMA=1), NOT on bitness of userspace where SYSCALL executes + * or target CS descriptor's L bit (SYSCALL does not read segment descriptors). + * + * Arguments: + * eax system call number + * ecx return address + * ebx arg1 + * ebp arg2 (note: not saved in the stack frame, should not be touched) + * edx arg3 + * esi arg4 + * edi arg5 + * esp user stack + * 0(%esp) arg6 + * + * This is purely a fast path. For anything complicated we use the int 0x80 + * path below. We set up a complete hardware stack frame to share code + * with the int 0x80 path. + */ +ENTRY(entry_SYSCALL_compat) + /* + * Interrupts are off on entry. + * We do not frame this tiny irq-off block with TRACE_IRQS_OFF/ON, + * it is too small to ever cause noticeable irq latency. + */ + SWAPGS_UNSAFE_STACK + movl %esp, %r8d + movq PER_CPU_VAR(cpu_current_top_of_stack), %rsp + ENABLE_INTERRUPTS(CLBR_NONE) + + /* Zero-extending 32-bit regs, do not remove */ + movl %eax, %eax + + /* Construct struct pt_regs on stack */ + pushq $__USER32_DS /* pt_regs->ss */ + pushq %r8 /* pt_regs->sp */ + pushq %r11 /* pt_regs->flags */ + pushq $__USER32_CS /* pt_regs->cs */ + pushq %rcx /* pt_regs->ip */ + pushq %rax /* pt_regs->orig_ax */ + pushq %rdi /* pt_regs->di */ + pushq %rsi /* pt_regs->si */ + pushq %rdx /* pt_regs->dx */ + pushq %rbp /* pt_regs->cx */ + movl %ebp, %ecx + pushq $-ENOSYS /* pt_regs->ax */ + sub $(10*8), %rsp /* pt_regs->r8-11, bp, bx, r12-15 not saved */ + + /* + * No need to do an access_ok check here because r8 has been + * 32-bit zero extended: + */ + ASM_STAC +1: movl (%r8), %ebp + _ASM_EXTABLE(1b, ia32_badarg) + ASM_CLAC + orl $TS_COMPAT, ASM_THREAD_INFO(TI_status, %rsp, SIZEOF_PTREGS) + testl $_TIF_WORK_SYSCALL_ENTRY, ASM_THREAD_INFO(TI_flags, %rsp, SIZEOF_PTREGS) + jnz cstar_tracesys + +cstar_do_call: + /* 32-bit syscall -> 64-bit C ABI argument conversion */ + movl %edi, %r8d /* arg5 */ + movl %ebp, %r9d /* arg6 */ + xchg %ecx, %esi /* rsi:arg2, rcx:arg4 */ + movl %ebx, %edi /* arg1 */ + movl %edx, %edx /* arg3 (zero extension) */ + +cstar_dispatch: + cmpq $(IA32_NR_syscalls-1), %rax + ja 1f + + call *ia32_sys_call_table(, %rax, 8) + movq %rax, RAX(%rsp) +1: + movl RCX(%rsp), %ebp + DISABLE_INTERRUPTS(CLBR_NONE) + TRACE_IRQS_OFF + testl $_TIF_ALLWORK_MASK, ASM_THREAD_INFO(TI_flags, %rsp, SIZEOF_PTREGS) + jnz sysretl_audit + +sysretl_from_sys_call: + andl $~TS_COMPAT, ASM_THREAD_INFO(TI_status, %rsp, SIZEOF_PTREGS) + RESTORE_RSI_RDI_RDX + movl RIP(%rsp), %ecx + movl EFLAGS(%rsp), %r11d + xorq %r10, %r10 + xorq %r9, %r9 + xorq %r8, %r8 + TRACE_IRQS_ON + movl RSP(%rsp), %esp + /* + * 64-bit->32-bit SYSRET restores eip from ecx, + * eflags from r11 (but RF and VM bits are forced to 0), + * cs and ss are loaded from MSRs. + * (Note: 32-bit->32-bit SYSRET is different: since r11 + * does not exist, it merely sets eflags.IF=1). + * + * NB: On AMD CPUs with the X86_BUG_SYSRET_SS_ATTRS bug, the ss + * descriptor is not reinitialized. This means that we must + * avoid SYSRET with SS == NULL, which could happen if we schedule, + * exit the kernel, and re-enter using an interrupt vector. (All + * interrupt entries on x86_64 set SS to NULL.) We prevent that + * from happening by reloading SS in __switch_to. + */ + USERGS_SYSRET32 + +#ifdef CONFIG_AUDITSYSCALL +cstar_auditsys: + auditsys_entry_common + jmp cstar_dispatch + +sysretl_audit: + auditsys_exit sysretl_from_sys_call +#endif + +cstar_tracesys: +#ifdef CONFIG_AUDITSYSCALL + testl $(_TIF_WORK_SYSCALL_ENTRY & ~_TIF_SYSCALL_AUDIT), ASM_THREAD_INFO(TI_flags, %rsp, SIZEOF_PTREGS) + jz cstar_auditsys +#endif + SAVE_EXTRA_REGS + xorl %eax, %eax /* Do not leak kernel information */ + movq %rax, R11(%rsp) + movq %rax, R10(%rsp) + movq %rax, R9(%rsp) + movq %rax, R8(%rsp) + movq %rsp, %rdi /* &pt_regs -> arg1 */ + call syscall_trace_enter + + /* Reload arg registers from stack. (see sysenter_tracesys) */ + movl RCX(%rsp), %ecx + movl RDX(%rsp), %edx + movl RSI(%rsp), %esi + movl RDI(%rsp), %edi + movl %eax, %eax /* zero extension */ + + RESTORE_EXTRA_REGS + jmp cstar_do_call +END(entry_SYSCALL_compat) + +ia32_badarg: + ASM_CLAC + movq $-EFAULT, RAX(%rsp) +ia32_ret_from_sys_call: + xorl %eax, %eax /* Do not leak kernel information */ + movq %rax, R11(%rsp) + movq %rax, R10(%rsp) + movq %rax, R9(%rsp) + movq %rax, R8(%rsp) + jmp int_ret_from_sys_call + +/* + * Emulated IA32 system calls via int 0x80. + * + * Arguments: + * eax system call number + * ebx arg1 + * ecx arg2 + * edx arg3 + * esi arg4 + * edi arg5 + * ebp arg6 (note: not saved in the stack frame, should not be touched) + * + * Notes: + * Uses the same stack frame as the x86-64 version. + * All registers except eax must be saved (but ptrace may violate that). + * Arguments are zero extended. For system calls that want sign extension and + * take long arguments a wrapper is needed. Most calls can just be called + * directly. + * Assumes it is only called from user space and entered with interrupts off. + */ + +ENTRY(entry_INT80_compat) + /* + * Interrupts are off on entry. + * We do not frame this tiny irq-off block with TRACE_IRQS_OFF/ON, + * it is too small to ever cause noticeable irq latency. + */ + PARAVIRT_ADJUST_EXCEPTION_FRAME + SWAPGS + ENABLE_INTERRUPTS(CLBR_NONE) + + /* Zero-extending 32-bit regs, do not remove */ + movl %eax, %eax + + /* Construct struct pt_regs on stack (iret frame is already on stack) */ + pushq %rax /* pt_regs->orig_ax */ + pushq %rdi /* pt_regs->di */ + pushq %rsi /* pt_regs->si */ + pushq %rdx /* pt_regs->dx */ + pushq %rcx /* pt_regs->cx */ + pushq $-ENOSYS /* pt_regs->ax */ + pushq $0 /* pt_regs->r8 */ + pushq $0 /* pt_regs->r9 */ + pushq $0 /* pt_regs->r10 */ + pushq $0 /* pt_regs->r11 */ + cld + sub $(6*8), %rsp /* pt_regs->bp, bx, r12-15 not saved */ + + orl $TS_COMPAT, ASM_THREAD_INFO(TI_status, %rsp, SIZEOF_PTREGS) + testl $_TIF_WORK_SYSCALL_ENTRY, ASM_THREAD_INFO(TI_flags, %rsp, SIZEOF_PTREGS) + jnz ia32_tracesys + +ia32_do_call: + /* 32-bit syscall -> 64-bit C ABI argument conversion */ + movl %edi, %r8d /* arg5 */ + movl %ebp, %r9d /* arg6 */ + xchg %ecx, %esi /* rsi:arg2, rcx:arg4 */ + movl %ebx, %edi /* arg1 */ + movl %edx, %edx /* arg3 (zero extension) */ + cmpq $(IA32_NR_syscalls-1), %rax + ja 1f + + call *ia32_sys_call_table(, %rax, 8) + movq %rax, RAX(%rsp) +1: + jmp int_ret_from_sys_call + +ia32_tracesys: + SAVE_EXTRA_REGS + movq %rsp, %rdi /* &pt_regs -> arg1 */ + call syscall_trace_enter + /* + * Reload arg registers from stack in case ptrace changed them. + * Don't reload %eax because syscall_trace_enter() returned + * the %rax value we should see. But do truncate it to 32 bits. + * If it's -1 to make us punt the syscall, then (u32)-1 is still + * an appropriately invalid value. + */ + movl RCX(%rsp), %ecx + movl RDX(%rsp), %edx + movl RSI(%rsp), %esi + movl RDI(%rsp), %edi + movl %eax, %eax /* zero extension */ + RESTORE_EXTRA_REGS + jmp ia32_do_call +END(entry_INT80_compat) + + .macro PTREGSCALL label, func + ALIGN +GLOBAL(\label) + leaq \func(%rip), %rax + jmp ia32_ptregs_common + .endm + + PTREGSCALL stub32_rt_sigreturn, sys32_rt_sigreturn + PTREGSCALL stub32_sigreturn, sys32_sigreturn + PTREGSCALL stub32_fork, sys_fork + PTREGSCALL stub32_vfork, sys_vfork + + ALIGN +GLOBAL(stub32_clone) + leaq sys_clone(%rip), %rax + /* + * The 32-bit clone ABI is: clone(..., int tls_val, int *child_tidptr). + * The 64-bit clone ABI is: clone(..., int *child_tidptr, int tls_val). + * + * The native 64-bit kernel's sys_clone() implements the latter, + * so we need to swap arguments here before calling it: + */ + xchg %r8, %rcx + jmp ia32_ptregs_common + + ALIGN +ia32_ptregs_common: + SAVE_EXTRA_REGS 8 + call *%rax + RESTORE_EXTRA_REGS 8 + ret +END(ia32_ptregs_common) diff --git a/arch/x86/kernel/syscall_32.c b/arch/x86/entry/syscall_32.c index 3777189..8ea34f9 100644 --- a/arch/x86/kernel/syscall_32.c +++ b/arch/x86/entry/syscall_32.c @@ -10,7 +10,7 @@ #else #define SYM(sym, compat) sym #define ia32_sys_call_table sys_call_table -#define __NR_ia32_syscall_max __NR_syscall_max +#define __NR_syscall_compat_max __NR_syscall_max #endif #define __SYSCALL_I386(nr, sym, compat) extern asmlinkage void SYM(sym, compat)(void) ; @@ -23,11 +23,11 @@ typedef asmlinkage void (*sys_call_ptr_t)(void); extern asmlinkage void sys_ni_syscall(void); -__visible const sys_call_ptr_t ia32_sys_call_table[__NR_ia32_syscall_max+1] = { +__visible const sys_call_ptr_t ia32_sys_call_table[__NR_syscall_compat_max+1] = { /* * Smells like a compiler bug -- it doesn't work * when the & below is removed. */ - [0 ... __NR_ia32_syscall_max] = &sys_ni_syscall, + [0 ... __NR_syscall_compat_max] = &sys_ni_syscall, #include <asm/syscalls_32.h> }; diff --git a/arch/x86/kernel/syscall_64.c b/arch/x86/entry/syscall_64.c index 4ac730b..4ac730b 100644 --- a/arch/x86/kernel/syscall_64.c +++ b/arch/x86/entry/syscall_64.c diff --git a/arch/x86/syscalls/Makefile b/arch/x86/entry/syscalls/Makefile index a55abb9..57aa59f 100644 --- a/arch/x86/syscalls/Makefile +++ b/arch/x86/entry/syscalls/Makefile @@ -1,5 +1,5 @@ -out := $(obj)/../include/generated/asm -uapi := $(obj)/../include/generated/uapi/asm +out := $(obj)/../../include/generated/asm +uapi := $(obj)/../../include/generated/uapi/asm # Create output directory if not already present _dummy := $(shell [ -d '$(out)' ] || mkdir -p '$(out)') \ diff --git a/arch/x86/syscalls/syscall_32.tbl b/arch/x86/entry/syscalls/syscall_32.tbl index ef8187f..ef8187f 100644 --- a/arch/x86/syscalls/syscall_32.tbl +++ b/arch/x86/entry/syscalls/syscall_32.tbl diff --git a/arch/x86/syscalls/syscall_64.tbl b/arch/x86/entry/syscalls/syscall_64.tbl index 9ef32d5..9ef32d5 100644 --- a/arch/x86/syscalls/syscall_64.tbl +++ b/arch/x86/entry/syscalls/syscall_64.tbl diff --git a/arch/x86/syscalls/syscallhdr.sh b/arch/x86/entry/syscalls/syscallhdr.sh index 31fd5f1..31fd5f1 100644 --- a/arch/x86/syscalls/syscallhdr.sh +++ b/arch/x86/entry/syscalls/syscallhdr.sh diff --git a/arch/x86/syscalls/syscalltbl.sh b/arch/x86/entry/syscalls/syscalltbl.sh index 0e7f8ec..0e7f8ec 100644 --- a/arch/x86/syscalls/syscalltbl.sh +++ b/arch/x86/entry/syscalls/syscalltbl.sh diff --git a/arch/x86/lib/thunk_32.S b/arch/x86/entry/thunk_32.S index e407941..e5a1711 100644 --- a/arch/x86/lib/thunk_32.S +++ b/arch/x86/entry/thunk_32.S @@ -6,16 +6,14 @@ */ #include <linux/linkage.h> #include <asm/asm.h> - #include <asm/dwarf2.h> /* put return address in eax (arg1) */ .macro THUNK name, func, put_ret_addr_in_eax=0 .globl \name \name: - CFI_STARTPROC - pushl_cfi_reg eax - pushl_cfi_reg ecx - pushl_cfi_reg edx + pushl %eax + pushl %ecx + pushl %edx .if \put_ret_addr_in_eax /* Place EIP in the arg1 */ @@ -23,11 +21,10 @@ .endif call \func - popl_cfi_reg edx - popl_cfi_reg ecx - popl_cfi_reg eax + popl %edx + popl %ecx + popl %eax ret - CFI_ENDPROC _ASM_NOKPROBE(\name) .endm diff --git a/arch/x86/lib/thunk_64.S b/arch/x86/entry/thunk_64.S index 2198902..efb2b93 100644 --- a/arch/x86/lib/thunk_64.S +++ b/arch/x86/entry/thunk_64.S @@ -6,35 +6,32 @@ * Subject to the GNU public license, v.2. No warranty of any kind. */ #include <linux/linkage.h> -#include <asm/dwarf2.h> -#include <asm/calling.h> +#include "calling.h" #include <asm/asm.h> /* rdi: arg1 ... normal C conventions. rax is saved/restored. */ .macro THUNK name, func, put_ret_addr_in_rdi=0 .globl \name \name: - CFI_STARTPROC /* this one pushes 9 elems, the next one would be %rIP */ - pushq_cfi_reg rdi - pushq_cfi_reg rsi - pushq_cfi_reg rdx - pushq_cfi_reg rcx - pushq_cfi_reg rax - pushq_cfi_reg r8 - pushq_cfi_reg r9 - pushq_cfi_reg r10 - pushq_cfi_reg r11 + pushq %rdi + pushq %rsi + pushq %rdx + pushq %rcx + pushq %rax + pushq %r8 + pushq %r9 + pushq %r10 + pushq %r11 .if \put_ret_addr_in_rdi /* 9*8(%rsp) is return addr on stack */ - movq_cfi_restore 9*8, rdi + movq 9*8(%rsp), %rdi .endif call \func jmp restore - CFI_ENDPROC _ASM_NOKPROBE(\name) .endm @@ -55,19 +52,16 @@ #if defined(CONFIG_TRACE_IRQFLAGS) \ || defined(CONFIG_DEBUG_LOCK_ALLOC) \ || defined(CONFIG_PREEMPT) - CFI_STARTPROC - CFI_ADJUST_CFA_OFFSET 9*8 restore: - popq_cfi_reg r11 - popq_cfi_reg r10 - popq_cfi_reg r9 - popq_cfi_reg r8 - popq_cfi_reg rax - popq_cfi_reg rcx - popq_cfi_reg rdx - popq_cfi_reg rsi - popq_cfi_reg rdi + popq %r11 + popq %r10 + popq %r9 + popq %r8 + popq %rax + popq %rcx + popq %rdx + popq %rsi + popq %rdi ret - CFI_ENDPROC _ASM_NOKPROBE(restore) #endif diff --git a/arch/x86/vdso/.gitignore b/arch/x86/entry/vdso/.gitignore index aae8ffd..aae8ffd 100644 --- a/arch/x86/vdso/.gitignore +++ b/arch/x86/entry/vdso/.gitignore diff --git a/arch/x86/vdso/Makefile b/arch/x86/entry/vdso/Makefile index e970320..e970320 100644 --- a/arch/x86/vdso/Makefile +++ b/arch/x86/entry/vdso/Makefile diff --git a/arch/x86/vdso/checkundef.sh b/arch/x86/entry/vdso/checkundef.sh index 7ee90a9..7ee90a9 100755 --- a/arch/x86/vdso/checkundef.sh +++ b/arch/x86/entry/vdso/checkundef.sh diff --git a/arch/x86/vdso/vclock_gettime.c b/arch/x86/entry/vdso/vclock_gettime.c index 9793322..9793322 100644 --- a/arch/x86/vdso/vclock_gettime.c +++ b/arch/x86/entry/vdso/vclock_gettime.c diff --git a/arch/x86/vdso/vdso-layout.lds.S b/arch/x86/entry/vdso/vdso-layout.lds.S index de2c921..de2c921 100644 --- a/arch/x86/vdso/vdso-layout.lds.S +++ b/arch/x86/entry/vdso/vdso-layout.lds.S diff --git a/arch/x86/vdso/vdso-note.S b/arch/x86/entry/vdso/vdso-note.S index 79a071e..79a071e 100644 --- a/arch/x86/vdso/vdso-note.S +++ b/arch/x86/entry/vdso/vdso-note.S diff --git a/arch/x86/vdso/vdso.lds.S b/arch/x86/entry/vdso/vdso.lds.S index 6807932..6807932 100644 --- a/arch/x86/vdso/vdso.lds.S +++ b/arch/x86/entry/vdso/vdso.lds.S diff --git a/arch/x86/vdso/vdso2c.c b/arch/x86/entry/vdso/vdso2c.c index 8627db2..8627db2 100644 --- a/arch/x86/vdso/vdso2c.c +++ b/arch/x86/entry/vdso/vdso2c.c diff --git a/arch/x86/vdso/vdso2c.h b/arch/x86/entry/vdso/vdso2c.h index 0224987..0224987 100644 --- a/arch/x86/vdso/vdso2c.h +++ b/arch/x86/entry/vdso/vdso2c.h diff --git a/arch/x86/vdso/vdso32-setup.c b/arch/x86/entry/vdso/vdso32-setup.c index e904c27..e904c27 100644 --- a/arch/x86/vdso/vdso32-setup.c +++ b/arch/x86/entry/vdso/vdso32-setup.c diff --git a/arch/x86/vdso/vdso32/.gitignore b/arch/x86/entry/vdso/vdso32/.gitignore index e45fba9..e45fba9 100644 --- a/arch/x86/vdso/vdso32/.gitignore +++ b/arch/x86/entry/vdso/vdso32/.gitignore diff --git a/arch/x86/vdso/vdso32/int80.S b/arch/x86/entry/vdso/vdso32/int80.S index b15b7c0..b15b7c0 100644 --- a/arch/x86/vdso/vdso32/int80.S +++ b/arch/x86/entry/vdso/vdso32/int80.S diff --git a/arch/x86/vdso/vdso32/note.S b/arch/x86/entry/vdso/vdso32/note.S index c83f257..c83f257 100644 --- a/arch/x86/vdso/vdso32/note.S +++ b/arch/x86/entry/vdso/vdso32/note.S diff --git a/arch/x86/vdso/vdso32/sigreturn.S b/arch/x86/entry/vdso/vdso32/sigreturn.S index d7ec4e2..d7ec4e2 100644 --- a/arch/x86/vdso/vdso32/sigreturn.S +++ b/arch/x86/entry/vdso/vdso32/sigreturn.S diff --git a/arch/x86/vdso/vdso32/syscall.S b/arch/x86/entry/vdso/vdso32/syscall.S index 6b286bb..6b286bb 100644 --- a/arch/x86/vdso/vdso32/syscall.S +++ b/arch/x86/entry/vdso/vdso32/syscall.S diff --git a/arch/x86/vdso/vdso32/sysenter.S b/arch/x86/entry/vdso/vdso32/sysenter.S index e354bce..e354bce 100644 --- a/arch/x86/vdso/vdso32/sysenter.S +++ b/arch/x86/entry/vdso/vdso32/sysenter.S diff --git a/arch/x86/vdso/vdso32/vclock_gettime.c b/arch/x86/entry/vdso/vdso32/vclock_gettime.c index 175cc72..175cc72 100644 --- a/arch/x86/vdso/vdso32/vclock_gettime.c +++ b/arch/x86/entry/vdso/vdso32/vclock_gettime.c diff --git a/arch/x86/vdso/vdso32/vdso-fakesections.c b/arch/x86/entry/vdso/vdso32/vdso-fakesections.c index 541468e..541468e 100644 --- a/arch/x86/vdso/vdso32/vdso-fakesections.c +++ b/arch/x86/entry/vdso/vdso32/vdso-fakesections.c diff --git a/arch/x86/vdso/vdso32/vdso32.lds.S b/arch/x86/entry/vdso/vdso32/vdso32.lds.S index 31056cf..31056cf 100644 --- a/arch/x86/vdso/vdso32/vdso32.lds.S +++ b/arch/x86/entry/vdso/vdso32/vdso32.lds.S diff --git a/arch/x86/vdso/vdsox32.lds.S b/arch/x86/entry/vdso/vdsox32.lds.S index 697c11e..697c11e 100644 --- a/arch/x86/vdso/vdsox32.lds.S +++ b/arch/x86/entry/vdso/vdsox32.lds.S diff --git a/arch/x86/vdso/vgetcpu.c b/arch/x86/entry/vdso/vgetcpu.c index 8ec3d1f..8ec3d1f 100644 --- a/arch/x86/vdso/vgetcpu.c +++ b/arch/x86/entry/vdso/vgetcpu.c diff --git a/arch/x86/vdso/vma.c b/arch/x86/entry/vdso/vma.c index 1c9f750..1c9f750 100644 --- a/arch/x86/vdso/vma.c +++ b/arch/x86/entry/vdso/vma.c diff --git a/arch/x86/entry/vsyscall/Makefile b/arch/x86/entry/vsyscall/Makefile new file mode 100644 index 0000000..a9f4856 --- /dev/null +++ b/arch/x86/entry/vsyscall/Makefile @@ -0,0 +1,7 @@ +# +# Makefile for the x86 low level vsyscall code +# +obj-y := vsyscall_gtod.o + +obj-$(CONFIG_X86_VSYSCALL_EMULATION) += vsyscall_64.o vsyscall_emu_64.o + diff --git a/arch/x86/kernel/vsyscall_64.c b/arch/x86/entry/vsyscall/vsyscall_64.c index 2dcc6ff..2dcc6ff 100644 --- a/arch/x86/kernel/vsyscall_64.c +++ b/arch/x86/entry/vsyscall/vsyscall_64.c diff --git a/arch/x86/kernel/vsyscall_emu_64.S b/arch/x86/entry/vsyscall/vsyscall_emu_64.S index c9596a9..c9596a9 100644 --- a/arch/x86/kernel/vsyscall_emu_64.S +++ b/arch/x86/entry/vsyscall/vsyscall_emu_64.S diff --git a/arch/x86/kernel/vsyscall_gtod.c b/arch/x86/entry/vsyscall/vsyscall_gtod.c index 51e3304..51e3304 100644 --- a/arch/x86/kernel/vsyscall_gtod.c +++ b/arch/x86/entry/vsyscall/vsyscall_gtod.c diff --git a/arch/x86/kernel/vsyscall_trace.h b/arch/x86/entry/vsyscall/vsyscall_trace.h index a8b2ede..9dd7359 100644 --- a/arch/x86/kernel/vsyscall_trace.h +++ b/arch/x86/entry/vsyscall/vsyscall_trace.h @@ -24,6 +24,6 @@ TRACE_EVENT(emulate_vsyscall, #endif #undef TRACE_INCLUDE_PATH -#define TRACE_INCLUDE_PATH ../../arch/x86/kernel +#define TRACE_INCLUDE_PATH ../../arch/x86/entry/vsyscall/ #define TRACE_INCLUDE_FILE vsyscall_trace #include <trace/define_trace.h> diff --git a/arch/x86/ia32/Makefile b/arch/x86/ia32/Makefile index bb635c6..cd4339b 100644 --- a/arch/x86/ia32/Makefile +++ b/arch/x86/ia32/Makefile @@ -2,7 +2,7 @@ # Makefile for the ia32 kernel emulation subsystem. # -obj-$(CONFIG_IA32_EMULATION) := ia32entry.o sys_ia32.o ia32_signal.o +obj-$(CONFIG_IA32_EMULATION) := sys_ia32.o ia32_signal.o obj-$(CONFIG_IA32_AOUT) += ia32_aout.o diff --git a/arch/x86/ia32/ia32entry.S b/arch/x86/ia32/ia32entry.S deleted file mode 100644 index 72bf268..0000000 --- a/arch/x86/ia32/ia32entry.S +++ /dev/null @@ -1,611 +0,0 @@ -/* - * Compatibility mode system call entry point for x86-64. - * - * Copyright 2000-2002 Andi Kleen, SuSE Labs. - */ - -#include <asm/dwarf2.h> -#include <asm/calling.h> -#include <asm/asm-offsets.h> -#include <asm/current.h> -#include <asm/errno.h> -#include <asm/ia32_unistd.h> -#include <asm/thread_info.h> -#include <asm/segment.h> -#include <asm/irqflags.h> -#include <asm/asm.h> -#include <asm/smap.h> -#include <linux/linkage.h> -#include <linux/err.h> - -/* Avoid __ASSEMBLER__'ifying <linux/audit.h> just for this. */ -#include <linux/elf-em.h> -#define AUDIT_ARCH_I386 (EM_386|__AUDIT_ARCH_LE) -#define __AUDIT_ARCH_LE 0x40000000 - -#ifndef CONFIG_AUDITSYSCALL -#define sysexit_audit ia32_ret_from_sys_call -#define sysretl_audit ia32_ret_from_sys_call -#endif - - .section .entry.text, "ax" - - /* clobbers %rax */ - .macro CLEAR_RREGS _r9=rax - xorl %eax,%eax - movq %rax,R11(%rsp) - movq %rax,R10(%rsp) - movq %\_r9,R9(%rsp) - movq %rax,R8(%rsp) - .endm - - /* - * Reload arg registers from stack in case ptrace changed them. - * We don't reload %eax because syscall_trace_enter() returned - * the %rax value we should see. Instead, we just truncate that - * value to 32 bits again as we did on entry from user mode. - * If it's a new value set by user_regset during entry tracing, - * this matches the normal truncation of the user-mode value. - * If it's -1 to make us punt the syscall, then (u32)-1 is still - * an appropriately invalid value. - */ - .macro LOAD_ARGS32 _r9=0 - .if \_r9 - movl R9(%rsp),%r9d - .endif - movl RCX(%rsp),%ecx - movl RDX(%rsp),%edx - movl RSI(%rsp),%esi - movl RDI(%rsp),%edi - movl %eax,%eax /* zero extension */ - .endm - - .macro CFI_STARTPROC32 simple - CFI_STARTPROC \simple - CFI_UNDEFINED r8 - CFI_UNDEFINED r9 - CFI_UNDEFINED r10 - CFI_UNDEFINED r11 - CFI_UNDEFINED r12 - CFI_UNDEFINED r13 - CFI_UNDEFINED r14 - CFI_UNDEFINED r15 - .endm - -#ifdef CONFIG_PARAVIRT -ENTRY(native_usergs_sysret32) - swapgs - sysretl -ENDPROC(native_usergs_sysret32) - -ENTRY(native_irq_enable_sysexit) - swapgs - sti - sysexit -ENDPROC(native_irq_enable_sysexit) -#endif - -/* - * 32bit SYSENTER instruction entry. - * - * SYSENTER loads ss, rsp, cs, and rip from previously programmed MSRs. - * IF and VM in rflags are cleared (IOW: interrupts are off). - * SYSENTER does not save anything on the stack, - * and does not save old rip (!!!) and rflags. - * - * Arguments: - * eax system call number - * ebx arg1 - * ecx arg2 - * edx arg3 - * esi arg4 - * edi arg5 - * ebp user stack - * 0(%ebp) arg6 - * - * This is purely a fast path. For anything complicated we use the int 0x80 - * path below. We set up a complete hardware stack frame to share code - * with the int 0x80 path. - */ -ENTRY(ia32_sysenter_target) - CFI_STARTPROC32 simple - CFI_SIGNAL_FRAME - CFI_DEF_CFA rsp,0 - CFI_REGISTER rsp,rbp - - /* - * Interrupts are off on entry. - * We do not frame this tiny irq-off block with TRACE_IRQS_OFF/ON, - * it is too small to ever cause noticeable irq latency. - */ - SWAPGS_UNSAFE_STACK - movq PER_CPU_VAR(cpu_tss + TSS_sp0), %rsp - ENABLE_INTERRUPTS(CLBR_NONE) - - /* Zero-extending 32-bit regs, do not remove */ - movl %ebp, %ebp - movl %eax, %eax - - movl ASM_THREAD_INFO(TI_sysenter_return, %rsp, 0), %r10d - CFI_REGISTER rip,r10 - - /* Construct struct pt_regs on stack */ - pushq_cfi $__USER32_DS /* pt_regs->ss */ - pushq_cfi %rbp /* pt_regs->sp */ - CFI_REL_OFFSET rsp,0 - pushfq_cfi /* pt_regs->flags */ - pushq_cfi $__USER32_CS /* pt_regs->cs */ - pushq_cfi %r10 /* pt_regs->ip = thread_info->sysenter_return */ - CFI_REL_OFFSET rip,0 - pushq_cfi_reg rax /* pt_regs->orig_ax */ - pushq_cfi_reg rdi /* pt_regs->di */ - pushq_cfi_reg rsi /* pt_regs->si */ - pushq_cfi_reg rdx /* pt_regs->dx */ - pushq_cfi_reg rcx /* pt_regs->cx */ - pushq_cfi_reg rax /* pt_regs->ax */ - cld - sub $(10*8),%rsp /* pt_regs->r8-11,bp,bx,r12-15 not saved */ - CFI_ADJUST_CFA_OFFSET 10*8 - - /* - * no need to do an access_ok check here because rbp has been - * 32bit zero extended - */ - ASM_STAC -1: movl (%rbp),%ebp - _ASM_EXTABLE(1b,ia32_badarg) - ASM_CLAC - - /* - * Sysenter doesn't filter flags, so we need to clear NT - * ourselves. To save a few cycles, we can check whether - * NT was set instead of doing an unconditional popfq. - */ - testl $X86_EFLAGS_NT,EFLAGS(%rsp) - jnz sysenter_fix_flags -sysenter_flags_fixed: - - orl $TS_COMPAT, ASM_THREAD_INFO(TI_status, %rsp, SIZEOF_PTREGS) - testl $_TIF_WORK_SYSCALL_ENTRY, ASM_THREAD_INFO(TI_flags, %rsp, SIZEOF_PTREGS) - CFI_REMEMBER_STATE - jnz sysenter_tracesys - cmpq $(IA32_NR_syscalls-1),%rax - ja ia32_badsys -sysenter_do_call: - /* 32bit syscall -> 64bit C ABI argument conversion */ - movl %edi,%r8d /* arg5 */ - movl %ebp,%r9d /* arg6 */ - xchg %ecx,%esi /* rsi:arg2, rcx:arg4 */ - movl %ebx,%edi /* arg1 */ - movl %edx,%edx /* arg3 (zero extension) */ -sysenter_dispatch: - call *ia32_sys_call_table(,%rax,8) - movq %rax,RAX(%rsp) - DISABLE_INTERRUPTS(CLBR_NONE) - TRACE_IRQS_OFF - testl $_TIF_ALLWORK_MASK, ASM_THREAD_INFO(TI_flags, %rsp, SIZEOF_PTREGS) - jnz sysexit_audit -sysexit_from_sys_call: - /* - * NB: SYSEXIT is not obviously safe for 64-bit kernels -- an - * NMI between STI and SYSEXIT has poorly specified behavior, - * and and NMI followed by an IRQ with usergs is fatal. So - * we just pretend we're using SYSEXIT but we really use - * SYSRETL instead. - * - * This code path is still called 'sysexit' because it pairs - * with 'sysenter' and it uses the SYSENTER calling convention. - */ - andl $~TS_COMPAT,ASM_THREAD_INFO(TI_status, %rsp, SIZEOF_PTREGS) - movl RIP(%rsp),%ecx /* User %eip */ - CFI_REGISTER rip,rcx - RESTORE_RSI_RDI - xorl %edx,%edx /* avoid info leaks */ - xorq %r8,%r8 - xorq %r9,%r9 - xorq %r10,%r10 - movl EFLAGS(%rsp),%r11d /* User eflags */ - /*CFI_RESTORE rflags*/ - TRACE_IRQS_ON - - /* - * SYSRETL works even on Intel CPUs. Use it in preference to SYSEXIT, - * since it avoids a dicey window with interrupts enabled. - */ - movl RSP(%rsp),%esp - - /* - * USERGS_SYSRET32 does: - * gsbase = user's gs base - * eip = ecx - * rflags = r11 - * cs = __USER32_CS - * ss = __USER_DS - * - * The prologue set RIP(%rsp) to VDSO32_SYSENTER_RETURN, which does: - * - * pop %ebp - * pop %edx - * pop %ecx - * - * Therefore, we invoke SYSRETL with EDX and R8-R10 zeroed to - * avoid info leaks. R11 ends up with VDSO32_SYSENTER_RETURN's - * address (already known to user code), and R12-R15 are - * callee-saved and therefore don't contain any interesting - * kernel data. - */ - USERGS_SYSRET32 - - CFI_RESTORE_STATE - -#ifdef CONFIG_AUDITSYSCALL - .macro auditsys_entry_common - movl %esi,%r8d /* 5th arg: 4th syscall arg */ - movl %ecx,%r9d /*swap with edx*/ - movl %edx,%ecx /* 4th arg: 3rd syscall arg */ - movl %r9d,%edx /* 3rd arg: 2nd syscall arg */ - movl %ebx,%esi /* 2nd arg: 1st syscall arg */ - movl %eax,%edi /* 1st arg: syscall number */ - call __audit_syscall_entry - movl RAX(%rsp),%eax /* reload syscall number */ - cmpq $(IA32_NR_syscalls-1),%rax - ja ia32_badsys - movl %ebx,%edi /* reload 1st syscall arg */ - movl RCX(%rsp),%esi /* reload 2nd syscall arg */ - movl RDX(%rsp),%edx /* reload 3rd syscall arg */ - movl RSI(%rsp),%ecx /* reload 4th syscall arg */ - movl RDI(%rsp),%r8d /* reload 5th syscall arg */ - .endm - - .macro auditsys_exit exit - testl $(_TIF_ALLWORK_MASK & ~_TIF_SYSCALL_AUDIT), ASM_THREAD_INFO(TI_flags, %rsp, SIZEOF_PTREGS) - jnz ia32_ret_from_sys_call - TRACE_IRQS_ON - ENABLE_INTERRUPTS(CLBR_NONE) - movl %eax,%esi /* second arg, syscall return value */ - cmpl $-MAX_ERRNO,%eax /* is it an error ? */ - jbe 1f - movslq %eax, %rsi /* if error sign extend to 64 bits */ -1: setbe %al /* 1 if error, 0 if not */ - movzbl %al,%edi /* zero-extend that into %edi */ - call __audit_syscall_exit - movq RAX(%rsp),%rax /* reload syscall return value */ - movl $(_TIF_ALLWORK_MASK & ~_TIF_SYSCALL_AUDIT),%edi - DISABLE_INTERRUPTS(CLBR_NONE) - TRACE_IRQS_OFF - testl %edi, ASM_THREAD_INFO(TI_flags, %rsp, SIZEOF_PTREGS) - jz \exit - CLEAR_RREGS - jmp int_with_check - .endm - -sysenter_auditsys: - auditsys_entry_common - movl %ebp,%r9d /* reload 6th syscall arg */ - jmp sysenter_dispatch - -sysexit_audit: - auditsys_exit sysexit_from_sys_call -#endif - -sysenter_fix_flags: - pushq_cfi $(X86_EFLAGS_IF|X86_EFLAGS_FIXED) - popfq_cfi - jmp sysenter_flags_fixed - -sysenter_tracesys: -#ifdef CONFIG_AUDITSYSCALL - testl $(_TIF_WORK_SYSCALL_ENTRY & ~_TIF_SYSCALL_AUDIT), ASM_THREAD_INFO(TI_flags, %rsp, SIZEOF_PTREGS) - jz sysenter_auditsys -#endif - SAVE_EXTRA_REGS - CLEAR_RREGS - movq $-ENOSYS,RAX(%rsp)/* ptrace can change this for a bad syscall */ - movq %rsp,%rdi /* &pt_regs -> arg1 */ - call syscall_trace_enter - LOAD_ARGS32 /* reload args from stack in case ptrace changed it */ - RESTORE_EXTRA_REGS - cmpq $(IA32_NR_syscalls-1),%rax - ja int_ret_from_sys_call /* sysenter_tracesys has set RAX(%rsp) */ - jmp sysenter_do_call - CFI_ENDPROC -ENDPROC(ia32_sysenter_target) - -/* - * 32bit SYSCALL instruction entry. - * - * 32bit SYSCALL saves rip to rcx, clears rflags.RF, then saves rflags to r11, - * then loads new ss, cs, and rip from previously programmed MSRs. - * rflags gets masked by a value from another MSR (so CLD and CLAC - * are not needed). SYSCALL does not save anything on the stack - * and does not change rsp. - * - * Note: rflags saving+masking-with-MSR happens only in Long mode - * (in legacy 32bit mode, IF, RF and VM bits are cleared and that's it). - * Don't get confused: rflags saving+masking depends on Long Mode Active bit - * (EFER.LMA=1), NOT on bitness of userspace where SYSCALL executes - * or target CS descriptor's L bit (SYSCALL does not read segment descriptors). - * - * Arguments: - * eax system call number - * ecx return address - * ebx arg1 - * ebp arg2 (note: not saved in the stack frame, should not be touched) - * edx arg3 - * esi arg4 - * edi arg5 - * esp user stack - * 0(%esp) arg6 - * - * This is purely a fast path. For anything complicated we use the int 0x80 - * path below. We set up a complete hardware stack frame to share code - * with the int 0x80 path. - */ -ENTRY(ia32_cstar_target) - CFI_STARTPROC32 simple - CFI_SIGNAL_FRAME - CFI_DEF_CFA rsp,0 - CFI_REGISTER rip,rcx - /*CFI_REGISTER rflags,r11*/ - - /* - * Interrupts are off on entry. - * We do not frame this tiny irq-off block with TRACE_IRQS_OFF/ON, - * it is too small to ever cause noticeable irq latency. - */ - SWAPGS_UNSAFE_STACK - movl %esp,%r8d - CFI_REGISTER rsp,r8 - movq PER_CPU_VAR(kernel_stack),%rsp - ENABLE_INTERRUPTS(CLBR_NONE) - - /* Zero-extending 32-bit regs, do not remove */ - movl %eax,%eax - - /* Construct struct pt_regs on stack */ - pushq_cfi $__USER32_DS /* pt_regs->ss */ - pushq_cfi %r8 /* pt_regs->sp */ - CFI_REL_OFFSET rsp,0 - pushq_cfi %r11 /* pt_regs->flags */ - pushq_cfi $__USER32_CS /* pt_regs->cs */ - pushq_cfi %rcx /* pt_regs->ip */ - CFI_REL_OFFSET rip,0 - pushq_cfi_reg rax /* pt_regs->orig_ax */ - pushq_cfi_reg rdi /* pt_regs->di */ - pushq_cfi_reg rsi /* pt_regs->si */ - pushq_cfi_reg rdx /* pt_regs->dx */ - pushq_cfi_reg rbp /* pt_regs->cx */ - movl %ebp,%ecx - pushq_cfi_reg rax /* pt_regs->ax */ - sub $(10*8),%rsp /* pt_regs->r8-11,bp,bx,r12-15 not saved */ - CFI_ADJUST_CFA_OFFSET 10*8 - - /* - * no need to do an access_ok check here because r8 has been - * 32bit zero extended - */ - ASM_STAC -1: movl (%r8),%r9d - _ASM_EXTABLE(1b,ia32_badarg) - ASM_CLAC - orl $TS_COMPAT, ASM_THREAD_INFO(TI_status, %rsp, SIZEOF_PTREGS) - testl $_TIF_WORK_SYSCALL_ENTRY, ASM_THREAD_INFO(TI_flags, %rsp, SIZEOF_PTREGS) - CFI_REMEMBER_STATE - jnz cstar_tracesys - cmpq $IA32_NR_syscalls-1,%rax - ja ia32_badsys -cstar_do_call: - /* 32bit syscall -> 64bit C ABI argument conversion */ - movl %edi,%r8d /* arg5 */ - /* r9 already loaded */ /* arg6 */ - xchg %ecx,%esi /* rsi:arg2, rcx:arg4 */ - movl %ebx,%edi /* arg1 */ - movl %edx,%edx /* arg3 (zero extension) */ -cstar_dispatch: - call *ia32_sys_call_table(,%rax,8) - movq %rax,RAX(%rsp) - DISABLE_INTERRUPTS(CLBR_NONE) - TRACE_IRQS_OFF - testl $_TIF_ALLWORK_MASK, ASM_THREAD_INFO(TI_flags, %rsp, SIZEOF_PTREGS) - jnz sysretl_audit -sysretl_from_sys_call: - andl $~TS_COMPAT, ASM_THREAD_INFO(TI_status, %rsp, SIZEOF_PTREGS) - RESTORE_RSI_RDI_RDX - movl RIP(%rsp),%ecx - CFI_REGISTER rip,rcx - movl EFLAGS(%rsp),%r11d - /*CFI_REGISTER rflags,r11*/ - xorq %r10,%r10 - xorq %r9,%r9 - xorq %r8,%r8 - TRACE_IRQS_ON - movl RSP(%rsp),%esp - CFI_RESTORE rsp - /* - * 64bit->32bit SYSRET restores eip from ecx, - * eflags from r11 (but RF and VM bits are forced to 0), - * cs and ss are loaded from MSRs. - * (Note: 32bit->32bit SYSRET is different: since r11 - * does not exist, it merely sets eflags.IF=1). - * - * NB: On AMD CPUs with the X86_BUG_SYSRET_SS_ATTRS bug, the ss - * descriptor is not reinitialized. This means that we must - * avoid SYSRET with SS == NULL, which could happen if we schedule, - * exit the kernel, and re-enter using an interrupt vector. (All - * interrupt entries on x86_64 set SS to NULL.) We prevent that - * from happening by reloading SS in __switch_to. - */ - USERGS_SYSRET32 - -#ifdef CONFIG_AUDITSYSCALL -cstar_auditsys: - CFI_RESTORE_STATE - movl %r9d,R9(%rsp) /* register to be clobbered by call */ - auditsys_entry_common - movl R9(%rsp),%r9d /* reload 6th syscall arg */ - jmp cstar_dispatch - -sysretl_audit: - auditsys_exit sysretl_from_sys_call -#endif - -cstar_tracesys: -#ifdef CONFIG_AUDITSYSCALL - testl $(_TIF_WORK_SYSCALL_ENTRY & ~_TIF_SYSCALL_AUDIT), ASM_THREAD_INFO(TI_flags, %rsp, SIZEOF_PTREGS) - jz cstar_auditsys -#endif - xchgl %r9d,%ebp - SAVE_EXTRA_REGS - CLEAR_RREGS r9 - movq $-ENOSYS,RAX(%rsp) /* ptrace can change this for a bad syscall */ - movq %rsp,%rdi /* &pt_regs -> arg1 */ - call syscall_trace_enter - LOAD_ARGS32 1 /* reload args from stack in case ptrace changed it */ - RESTORE_EXTRA_REGS - xchgl %ebp,%r9d - cmpq $(IA32_NR_syscalls-1),%rax - ja int_ret_from_sys_call /* cstar_tracesys has set RAX(%rsp) */ - jmp cstar_do_call -END(ia32_cstar_target) - -ia32_badarg: - ASM_CLAC - movq $-EFAULT,%rax - jmp ia32_sysret - CFI_ENDPROC - -/* - * Emulated IA32 system calls via int 0x80. - * - * Arguments: - * eax system call number - * ebx arg1 - * ecx arg2 - * edx arg3 - * esi arg4 - * edi arg5 - * ebp arg6 (note: not saved in the stack frame, should not be touched) - * - * Notes: - * Uses the same stack frame as the x86-64 version. - * All registers except eax must be saved (but ptrace may violate that). - * Arguments are zero extended. For system calls that want sign extension and - * take long arguments a wrapper is needed. Most calls can just be called - * directly. - * Assumes it is only called from user space and entered with interrupts off. - */ - -ENTRY(ia32_syscall) - CFI_STARTPROC32 simple - CFI_SIGNAL_FRAME - CFI_DEF_CFA rsp,5*8 - /*CFI_REL_OFFSET ss,4*8 */ - CFI_REL_OFFSET rsp,3*8 - /*CFI_REL_OFFSET rflags,2*8 */ - /*CFI_REL_OFFSET cs,1*8 */ - CFI_REL_OFFSET rip,0*8 - - /* - * Interrupts are off on entry. - * We do not frame this tiny irq-off block with TRACE_IRQS_OFF/ON, - * it is too small to ever cause noticeable irq latency. - */ - PARAVIRT_ADJUST_EXCEPTION_FRAME - SWAPGS - ENABLE_INTERRUPTS(CLBR_NONE) - - /* Zero-extending 32-bit regs, do not remove */ - movl %eax,%eax - - /* Construct struct pt_regs on stack (iret frame is already on stack) */ - pushq_cfi_reg rax /* pt_regs->orig_ax */ - pushq_cfi_reg rdi /* pt_regs->di */ - pushq_cfi_reg rsi /* pt_regs->si */ - pushq_cfi_reg rdx /* pt_regs->dx */ - pushq_cfi_reg rcx /* pt_regs->cx */ - pushq_cfi_reg rax /* pt_regs->ax */ - cld - sub $(10*8),%rsp /* pt_regs->r8-11,bp,bx,r12-15 not saved */ - CFI_ADJUST_CFA_OFFSET 10*8 - - orl $TS_COMPAT, ASM_THREAD_INFO(TI_status, %rsp, SIZEOF_PTREGS) - testl $_TIF_WORK_SYSCALL_ENTRY, ASM_THREAD_INFO(TI_flags, %rsp, SIZEOF_PTREGS) - jnz ia32_tracesys - cmpq $(IA32_NR_syscalls-1),%rax - ja ia32_badsys -ia32_do_call: - /* 32bit syscall -> 64bit C ABI argument conversion */ - movl %edi,%r8d /* arg5 */ - movl %ebp,%r9d /* arg6 */ - xchg %ecx,%esi /* rsi:arg2, rcx:arg4 */ - movl %ebx,%edi /* arg1 */ - movl %edx,%edx /* arg3 (zero extension) */ - call *ia32_sys_call_table(,%rax,8) # xxx: rip relative -ia32_sysret: - movq %rax,RAX(%rsp) -ia32_ret_from_sys_call: - CLEAR_RREGS - jmp int_ret_from_sys_call - -ia32_tracesys: - SAVE_EXTRA_REGS - CLEAR_RREGS - movq $-ENOSYS,RAX(%rsp) /* ptrace can change this for a bad syscall */ - movq %rsp,%rdi /* &pt_regs -> arg1 */ - call syscall_trace_enter - LOAD_ARGS32 /* reload args from stack in case ptrace changed it */ - RESTORE_EXTRA_REGS - cmpq $(IA32_NR_syscalls-1),%rax - ja int_ret_from_sys_call /* ia32_tracesys has set RAX(%rsp) */ - jmp ia32_do_call -END(ia32_syscall) - -ia32_badsys: - movq $0,ORIG_RAX(%rsp) - movq $-ENOSYS,%rax - jmp ia32_sysret - - CFI_ENDPROC - - .macro PTREGSCALL label, func - ALIGN -GLOBAL(\label) - leaq \func(%rip),%rax - jmp ia32_ptregs_common - .endm - - CFI_STARTPROC32 - - PTREGSCALL stub32_rt_sigreturn, sys32_rt_sigreturn - PTREGSCALL stub32_sigreturn, sys32_sigreturn - PTREGSCALL stub32_fork, sys_fork - PTREGSCALL stub32_vfork, sys_vfork - - ALIGN -GLOBAL(stub32_clone) - leaq sys_clone(%rip),%rax - mov %r8, %rcx - jmp ia32_ptregs_common - - ALIGN -ia32_ptregs_common: - CFI_ENDPROC - CFI_STARTPROC32 simple - CFI_SIGNAL_FRAME - CFI_DEF_CFA rsp,SIZEOF_PTREGS - CFI_REL_OFFSET rax,RAX - CFI_REL_OFFSET rcx,RCX - CFI_REL_OFFSET rdx,RDX - CFI_REL_OFFSET rsi,RSI - CFI_REL_OFFSET rdi,RDI - CFI_REL_OFFSET rip,RIP -/* CFI_REL_OFFSET cs,CS*/ -/* CFI_REL_OFFSET rflags,EFLAGS*/ - CFI_REL_OFFSET rsp,RSP -/* CFI_REL_OFFSET ss,SS*/ - SAVE_EXTRA_REGS 8 - call *%rax - RESTORE_EXTRA_REGS 8 - ret - CFI_ENDPROC -END(ia32_ptregs_common) diff --git a/arch/x86/include/asm/alternative-asm.h b/arch/x86/include/asm/alternative-asm.h index bdf02ee..e7636ba 100644 --- a/arch/x86/include/asm/alternative-asm.h +++ b/arch/x86/include/asm/alternative-asm.h @@ -18,6 +18,12 @@ .endm #endif +/* + * Issue one struct alt_instr descriptor entry (need to put it into + * the section .altinstructions, see below). This entry contains + * enough information for the alternatives patching code to patch an + * instruction. See apply_alternatives(). + */ .macro altinstruction_entry orig alt feature orig_len alt_len pad_len .long \orig - . .long \alt - . @@ -27,6 +33,12 @@ .byte \pad_len .endm +/* + * Define an alternative between two instructions. If @feature is + * present, early code in apply_alternatives() replaces @oldinstr with + * @newinstr. ".skip" directive takes care of proper instruction padding + * in case @newinstr is longer than @oldinstr. + */ .macro ALTERNATIVE oldinstr, newinstr, feature 140: \oldinstr @@ -55,6 +67,12 @@ */ #define alt_max_short(a, b) ((a) ^ (((a) ^ (b)) & -(-((a) < (b))))) + +/* + * Same as ALTERNATIVE macro above but for two alternatives. If CPU + * has @feature1, it replaces @oldinstr with @newinstr1. If CPU has + * @feature2, it replaces @oldinstr with @feature2. + */ .macro ALTERNATIVE_2 oldinstr, newinstr1, feature1, newinstr2, feature2 140: \oldinstr diff --git a/arch/x86/include/asm/apic.h b/arch/x86/include/asm/apic.h index 976b86a..c839363 100644 --- a/arch/x86/include/asm/apic.h +++ b/arch/x86/include/asm/apic.h @@ -644,6 +644,12 @@ static inline void entering_ack_irq(void) entering_irq(); } +static inline void ipi_entering_ack_irq(void) +{ + ack_APIC_irq(); + irq_enter(); +} + static inline void exiting_irq(void) { irq_exit(); diff --git a/arch/x86/include/asm/asm.h b/arch/x86/include/asm/asm.h index 7730c1c..189679a 100644 --- a/arch/x86/include/asm/asm.h +++ b/arch/x86/include/asm/asm.h @@ -63,6 +63,31 @@ _ASM_ALIGN ; \ _ASM_PTR (entry); \ .popsection + +.macro ALIGN_DESTINATION + /* check for bad alignment of destination */ + movl %edi,%ecx + andl $7,%ecx + jz 102f /* already aligned */ + subl $8,%ecx + negl %ecx + subl %ecx,%edx +100: movb (%rsi),%al +101: movb %al,(%rdi) + incq %rsi + incq %rdi + decl %ecx + jnz 100b +102: + .section .fixup,"ax" +103: addl %ecx,%edx /* ecx is zerorest also */ + jmp copy_user_handle_tail + .previous + + _ASM_EXTABLE(100b,103b) + _ASM_EXTABLE(101b,103b) + .endm + #else # define _ASM_EXTABLE(from,to) \ " .pushsection \"__ex_table\",\"a\"\n" \ diff --git a/arch/x86/include/asm/atomic.h b/arch/x86/include/asm/atomic.h index 5e5cd12..e916895 100644 --- a/arch/x86/include/asm/atomic.h +++ b/arch/x86/include/asm/atomic.h @@ -22,7 +22,7 @@ * * Atomically reads the value of @v. */ -static inline int atomic_read(const atomic_t *v) +static __always_inline int atomic_read(const atomic_t *v) { return ACCESS_ONCE((v)->counter); } @@ -34,7 +34,7 @@ static inline int atomic_read(const atomic_t *v) * * Atomically sets the value of @v to @i. */ -static inline void atomic_set(atomic_t *v, int i) +static __always_inline void atomic_set(atomic_t *v, int i) { v->counter = i; } @@ -46,7 +46,7 @@ static inline void atomic_set(atomic_t *v, int i) * * Atomically adds @i to @v. */ -static inline void atomic_add(int i, atomic_t *v) +static __always_inline void atomic_add(int i, atomic_t *v) { asm volatile(LOCK_PREFIX "addl %1,%0" : "+m" (v->counter) @@ -60,7 +60,7 @@ static inline void atomic_add(int i, atomic_t *v) * * Atomically subtracts @i from @v. */ -static inline void atomic_sub(int i, atomic_t *v) +static __always_inline void atomic_sub(int i, atomic_t *v) { asm volatile(LOCK_PREFIX "subl %1,%0" : "+m" (v->counter) @@ -76,7 +76,7 @@ static inline void atomic_sub(int i, atomic_t *v) * true if the result is zero, or false for all * other cases. */ -static inline int atomic_sub_and_test(int i, atomic_t *v) +static __always_inline int atomic_sub_and_test(int i, atomic_t *v) { GEN_BINARY_RMWcc(LOCK_PREFIX "subl", v->counter, "er", i, "%0", "e"); } @@ -87,7 +87,7 @@ static inline int atomic_sub_and_test(int i, atomic_t *v) * * Atomically increments @v by 1. */ -static inline void atomic_inc(atomic_t *v) +static __always_inline void atomic_inc(atomic_t *v) { asm volatile(LOCK_PREFIX "incl %0" : "+m" (v->counter)); @@ -99,7 +99,7 @@ static inline void atomic_inc(atomic_t *v) * * Atomically decrements @v by 1. */ -static inline void atomic_dec(atomic_t *v) +static __always_inline void atomic_dec(atomic_t *v) { asm volatile(LOCK_PREFIX "decl %0" : "+m" (v->counter)); @@ -113,7 +113,7 @@ static inline void atomic_dec(atomic_t *v) * returns true if the result is 0, or false for all other * cases. */ -static inline int atomic_dec_and_test(atomic_t *v) +static __always_inline int atomic_dec_and_test(atomic_t *v) { GEN_UNARY_RMWcc(LOCK_PREFIX "decl", v->counter, "%0", "e"); } @@ -126,7 +126,7 @@ static inline int atomic_dec_and_test(atomic_t *v) * and returns true if the result is zero, or false for all * other cases. */ -static inline int atomic_inc_and_test(atomic_t *v) +static __always_inline int atomic_inc_and_test(atomic_t *v) { GEN_UNARY_RMWcc(LOCK_PREFIX "incl", v->counter, "%0", "e"); } @@ -140,7 +140,7 @@ static inline int atomic_inc_and_test(atomic_t *v) * if the result is negative, or false when * result is greater than or equal to zero. */ -static inline int atomic_add_negative(int i, atomic_t *v) +static __always_inline int atomic_add_negative(int i, atomic_t *v) { GEN_BINARY_RMWcc(LOCK_PREFIX "addl", v->counter, "er", i, "%0", "s"); } @@ -152,7 +152,7 @@ static inline int atomic_add_negative(int i, atomic_t *v) * * Atomically adds @i to @v and returns @i + @v */ -static inline int atomic_add_return(int i, atomic_t *v) +static __always_inline int atomic_add_return(int i, atomic_t *v) { return i + xadd(&v->counter, i); } @@ -164,7 +164,7 @@ static inline int atomic_add_return(int i, atomic_t *v) * * Atomically subtracts @i from @v and returns @v - @i */ -static inline int atomic_sub_return(int i, atomic_t *v) +static __always_inline int atomic_sub_return(int i, atomic_t *v) { return atomic_add_return(-i, v); } @@ -172,7 +172,7 @@ static inline int atomic_sub_return(int i, atomic_t *v) #define atomic_inc_return(v) (atomic_add_return(1, v)) #define atomic_dec_return(v) (atomic_sub_return(1, v)) -static inline int atomic_cmpxchg(atomic_t *v, int old, int new) +static __always_inline int atomic_cmpxchg(atomic_t *v, int old, int new) { return cmpxchg(&v->counter, old, new); } @@ -191,7 +191,7 @@ static inline int atomic_xchg(atomic_t *v, int new) * Atomically adds @a to @v, so long as @v was not already @u. * Returns the old value of @v. */ -static inline int __atomic_add_unless(atomic_t *v, int a, int u) +static __always_inline int __atomic_add_unless(atomic_t *v, int a, int u) { int c, old; c = atomic_read(v); @@ -213,7 +213,7 @@ static inline int __atomic_add_unless(atomic_t *v, int a, int u) * Atomically adds 1 to @v * Returns the new value of @u */ -static inline short int atomic_inc_short(short int *v) +static __always_inline short int atomic_inc_short(short int *v) { asm(LOCK_PREFIX "addw $1, %0" : "+m" (*v)); return *v; diff --git a/arch/x86/include/asm/atomic64_64.h b/arch/x86/include/asm/atomic64_64.h index f8d273e..b965f9e 100644 --- a/arch/x86/include/asm/atomic64_64.h +++ b/arch/x86/include/asm/atomic64_64.h @@ -40,7 +40,7 @@ static inline void atomic64_set(atomic64_t *v, long i) * * Atomically adds @i to @v. */ -static inline void atomic64_add(long i, atomic64_t *v) +static __always_inline void atomic64_add(long i, atomic64_t *v) { asm volatile(LOCK_PREFIX "addq %1,%0" : "=m" (v->counter) @@ -81,7 +81,7 @@ static inline int atomic64_sub_and_test(long i, atomic64_t *v) * * Atomically increments @v by 1. */ -static inline void atomic64_inc(atomic64_t *v) +static __always_inline void atomic64_inc(atomic64_t *v) { asm volatile(LOCK_PREFIX "incq %0" : "=m" (v->counter) @@ -94,7 +94,7 @@ static inline void atomic64_inc(atomic64_t *v) * * Atomically decrements @v by 1. */ -static inline void atomic64_dec(atomic64_t *v) +static __always_inline void atomic64_dec(atomic64_t *v) { asm volatile(LOCK_PREFIX "decq %0" : "=m" (v->counter) @@ -148,7 +148,7 @@ static inline int atomic64_add_negative(long i, atomic64_t *v) * * Atomically adds @i to @v and returns @i + @v */ -static inline long atomic64_add_return(long i, atomic64_t *v) +static __always_inline long atomic64_add_return(long i, atomic64_t *v) { return i + xadd(&v->counter, i); } diff --git a/arch/x86/include/asm/cacheflush.h b/arch/x86/include/asm/cacheflush.h index 47c8e32..b6f7457 100644 --- a/arch/x86/include/asm/cacheflush.h +++ b/arch/x86/include/asm/cacheflush.h @@ -8,7 +8,7 @@ /* * The set_memory_* API can be used to change various attributes of a virtual * address range. The attributes include: - * Cachability : UnCached, WriteCombining, WriteBack + * Cachability : UnCached, WriteCombining, WriteThrough, WriteBack * Executability : eXeutable, NoteXecutable * Read/Write : ReadOnly, ReadWrite * Presence : NotPresent @@ -35,9 +35,11 @@ int _set_memory_uc(unsigned long addr, int numpages); int _set_memory_wc(unsigned long addr, int numpages); +int _set_memory_wt(unsigned long addr, int numpages); int _set_memory_wb(unsigned long addr, int numpages); int set_memory_uc(unsigned long addr, int numpages); int set_memory_wc(unsigned long addr, int numpages); +int set_memory_wt(unsigned long addr, int numpages); int set_memory_wb(unsigned long addr, int numpages); int set_memory_x(unsigned long addr, int numpages); int set_memory_nx(unsigned long addr, int numpages); @@ -48,10 +50,12 @@ int set_memory_4k(unsigned long addr, int numpages); int set_memory_array_uc(unsigned long *addr, int addrinarray); int set_memory_array_wc(unsigned long *addr, int addrinarray); +int set_memory_array_wt(unsigned long *addr, int addrinarray); int set_memory_array_wb(unsigned long *addr, int addrinarray); int set_pages_array_uc(struct page **pages, int addrinarray); int set_pages_array_wc(struct page **pages, int addrinarray); +int set_pages_array_wt(struct page **pages, int addrinarray); int set_pages_array_wb(struct page **pages, int addrinarray); /* diff --git a/arch/x86/include/asm/dwarf2.h b/arch/x86/include/asm/dwarf2.h deleted file mode 100644 index de1cdaf..0000000 --- a/arch/x86/include/asm/dwarf2.h +++ /dev/null @@ -1,170 +0,0 @@ -#ifndef _ASM_X86_DWARF2_H -#define _ASM_X86_DWARF2_H - -#ifndef __ASSEMBLY__ -#warning "asm/dwarf2.h should be only included in pure assembly files" -#endif - -/* - * Macros for dwarf2 CFI unwind table entries. - * See "as.info" for details on these pseudo ops. Unfortunately - * they are only supported in very new binutils, so define them - * away for older version. - */ - -#ifdef CONFIG_AS_CFI - -#define CFI_STARTPROC .cfi_startproc -#define CFI_ENDPROC .cfi_endproc -#define CFI_DEF_CFA .cfi_def_cfa -#define CFI_DEF_CFA_REGISTER .cfi_def_cfa_register -#define CFI_DEF_CFA_OFFSET .cfi_def_cfa_offset -#define CFI_ADJUST_CFA_OFFSET .cfi_adjust_cfa_offset -#define CFI_OFFSET .cfi_offset -#define CFI_REL_OFFSET .cfi_rel_offset -#define CFI_REGISTER .cfi_register -#define CFI_RESTORE .cfi_restore -#define CFI_REMEMBER_STATE .cfi_remember_state -#define CFI_RESTORE_STATE .cfi_restore_state -#define CFI_UNDEFINED .cfi_undefined -#define CFI_ESCAPE .cfi_escape - -#ifdef CONFIG_AS_CFI_SIGNAL_FRAME -#define CFI_SIGNAL_FRAME .cfi_signal_frame -#else -#define CFI_SIGNAL_FRAME -#endif - -#if defined(CONFIG_AS_CFI_SECTIONS) && defined(__ASSEMBLY__) - /* - * Emit CFI data in .debug_frame sections, not .eh_frame sections. - * The latter we currently just discard since we don't do DWARF - * unwinding at runtime. So only the offline DWARF information is - * useful to anyone. Note we should not use this directive if this - * file is used in the vDSO assembly, or if vmlinux.lds.S gets - * changed so it doesn't discard .eh_frame. - */ - .cfi_sections .debug_frame -#endif - -#else - -/* - * Due to the structure of pre-exisiting code, don't use assembler line - * comment character # to ignore the arguments. Instead, use a dummy macro. - */ -.macro cfi_ignore a=0, b=0, c=0, d=0 -.endm - -#define CFI_STARTPROC cfi_ignore -#define CFI_ENDPROC cfi_ignore -#define CFI_DEF_CFA cfi_ignore -#define CFI_DEF_CFA_REGISTER cfi_ignore -#define CFI_DEF_CFA_OFFSET cfi_ignore -#define CFI_ADJUST_CFA_OFFSET cfi_ignore -#define CFI_OFFSET cfi_ignore -#define CFI_REL_OFFSET cfi_ignore -#define CFI_REGISTER cfi_ignore -#define CFI_RESTORE cfi_ignore -#define CFI_REMEMBER_STATE cfi_ignore -#define CFI_RESTORE_STATE cfi_ignore -#define CFI_UNDEFINED cfi_ignore -#define CFI_ESCAPE cfi_ignore -#define CFI_SIGNAL_FRAME cfi_ignore - -#endif - -/* - * An attempt to make CFI annotations more or less - * correct and shorter. It is implied that you know - * what you're doing if you use them. - */ -#ifdef __ASSEMBLY__ -#ifdef CONFIG_X86_64 - .macro pushq_cfi reg - pushq \reg - CFI_ADJUST_CFA_OFFSET 8 - .endm - - .macro pushq_cfi_reg reg - pushq %\reg - CFI_ADJUST_CFA_OFFSET 8 - CFI_REL_OFFSET \reg, 0 - .endm - - .macro popq_cfi reg - popq \reg - CFI_ADJUST_CFA_OFFSET -8 - .endm - - .macro popq_cfi_reg reg - popq %\reg - CFI_ADJUST_CFA_OFFSET -8 - CFI_RESTORE \reg - .endm - - .macro pushfq_cfi - pushfq - CFI_ADJUST_CFA_OFFSET 8 - .endm - - .macro popfq_cfi - popfq - CFI_ADJUST_CFA_OFFSET -8 - .endm - - .macro movq_cfi reg offset=0 - movq %\reg, \offset(%rsp) - CFI_REL_OFFSET \reg, \offset - .endm - - .macro movq_cfi_restore offset reg - movq \offset(%rsp), %\reg - CFI_RESTORE \reg - .endm -#else /*!CONFIG_X86_64*/ - .macro pushl_cfi reg - pushl \reg - CFI_ADJUST_CFA_OFFSET 4 - .endm - - .macro pushl_cfi_reg reg - pushl %\reg - CFI_ADJUST_CFA_OFFSET 4 - CFI_REL_OFFSET \reg, 0 - .endm - - .macro popl_cfi reg - popl \reg - CFI_ADJUST_CFA_OFFSET -4 - .endm - - .macro popl_cfi_reg reg - popl %\reg - CFI_ADJUST_CFA_OFFSET -4 - CFI_RESTORE \reg - .endm - - .macro pushfl_cfi - pushfl - CFI_ADJUST_CFA_OFFSET 4 - .endm - - .macro popfl_cfi - popfl - CFI_ADJUST_CFA_OFFSET -4 - .endm - - .macro movl_cfi reg offset=0 - movl %\reg, \offset(%esp) - CFI_REL_OFFSET \reg, \offset - .endm - - .macro movl_cfi_restore offset reg - movl \offset(%esp), %\reg - CFI_RESTORE \reg - .endm -#endif /*!CONFIG_X86_64*/ -#endif /*__ASSEMBLY__*/ - -#endif /* _ASM_X86_DWARF2_H */ diff --git a/arch/x86/include/asm/entry_arch.h b/arch/x86/include/asm/entry_arch.h index dc5fa66..df00299 100644 --- a/arch/x86/include/asm/entry_arch.h +++ b/arch/x86/include/asm/entry_arch.h @@ -23,6 +23,8 @@ BUILD_INTERRUPT(x86_platform_ipi, X86_PLATFORM_IPI_VECTOR) #ifdef CONFIG_HAVE_KVM BUILD_INTERRUPT3(kvm_posted_intr_ipi, POSTED_INTR_VECTOR, smp_kvm_posted_intr_ipi) +BUILD_INTERRUPT3(kvm_posted_intr_wakeup_ipi, POSTED_INTR_WAKEUP_VECTOR, + smp_kvm_posted_intr_wakeup_ipi) #endif /* @@ -50,4 +52,7 @@ BUILD_INTERRUPT(thermal_interrupt,THERMAL_APIC_VECTOR) BUILD_INTERRUPT(threshold_interrupt,THRESHOLD_APIC_VECTOR) #endif +#ifdef CONFIG_X86_MCE_AMD +BUILD_INTERRUPT(deferred_error_interrupt, DEFERRED_ERROR_VECTOR) +#endif #endif diff --git a/arch/x86/include/asm/frame.h b/arch/x86/include/asm/frame.h index 3b629f4..793179c 100644 --- a/arch/x86/include/asm/frame.h +++ b/arch/x86/include/asm/frame.h @@ -1,20 +1,17 @@ #ifdef __ASSEMBLY__ #include <asm/asm.h> -#include <asm/dwarf2.h> /* The annotation hides the frame from the unwinder and makes it look like a ordinary ebp save/restore. This avoids some special cases for frame pointer later */ #ifdef CONFIG_FRAME_POINTER .macro FRAME - __ASM_SIZE(push,_cfi) %__ASM_REG(bp) - CFI_REL_OFFSET __ASM_REG(bp), 0 + __ASM_SIZE(push,) %__ASM_REG(bp) __ASM_SIZE(mov) %__ASM_REG(sp), %__ASM_REG(bp) .endm .macro ENDFRAME - __ASM_SIZE(pop,_cfi) %__ASM_REG(bp) - CFI_RESTORE __ASM_REG(bp) + __ASM_SIZE(pop,) %__ASM_REG(bp) .endm #else .macro FRAME diff --git a/arch/x86/include/asm/hardirq.h b/arch/x86/include/asm/hardirq.h index 0f5fb6b..7178043 100644 --- a/arch/x86/include/asm/hardirq.h +++ b/arch/x86/include/asm/hardirq.h @@ -14,6 +14,7 @@ typedef struct { #endif #ifdef CONFIG_HAVE_KVM unsigned int kvm_posted_intr_ipis; + unsigned int kvm_posted_intr_wakeup_ipis; #endif unsigned int x86_platform_ipis; /* arch dependent */ unsigned int apic_perf_irqs; @@ -33,6 +34,9 @@ typedef struct { #ifdef CONFIG_X86_MCE_THRESHOLD unsigned int irq_threshold_count; #endif +#ifdef CONFIG_X86_MCE_AMD + unsigned int irq_deferred_error_count; +#endif #if IS_ENABLED(CONFIG_HYPERV) || defined(CONFIG_XEN) unsigned int irq_hv_callback_count; #endif diff --git a/arch/x86/include/asm/hpet.h b/arch/x86/include/asm/hpet.h index 36f7125..5fa9fb0 100644 --- a/arch/x86/include/asm/hpet.h +++ b/arch/x86/include/asm/hpet.h @@ -74,20 +74,16 @@ extern unsigned int hpet_readl(unsigned int a); extern void force_hpet_resume(void); struct irq_data; +struct hpet_dev; +struct irq_domain; + extern void hpet_msi_unmask(struct irq_data *data); extern void hpet_msi_mask(struct irq_data *data); -struct hpet_dev; extern void hpet_msi_write(struct hpet_dev *hdev, struct msi_msg *msg); extern void hpet_msi_read(struct hpet_dev *hdev, struct msi_msg *msg); - -#ifdef CONFIG_PCI_MSI -extern int default_setup_hpet_msi(unsigned int irq, unsigned int id); -#else -static inline int default_setup_hpet_msi(unsigned int irq, unsigned int id) -{ - return -EINVAL; -} -#endif +extern struct irq_domain *hpet_create_irq_domain(int hpet_id); +extern int hpet_assign_irq(struct irq_domain *domain, + struct hpet_dev *dev, int dev_num); #ifdef CONFIG_HPET_EMULATE_RTC diff --git a/arch/x86/include/asm/hw_irq.h b/arch/x86/include/asm/hw_irq.h index e9571dd..6615032 100644 --- a/arch/x86/include/asm/hw_irq.h +++ b/arch/x86/include/asm/hw_irq.h @@ -29,6 +29,7 @@ extern asmlinkage void apic_timer_interrupt(void); extern asmlinkage void x86_platform_ipi(void); extern asmlinkage void kvm_posted_intr_ipi(void); +extern asmlinkage void kvm_posted_intr_wakeup_ipi(void); extern asmlinkage void error_interrupt(void); extern asmlinkage void irq_work_interrupt(void); @@ -36,43 +37,10 @@ extern asmlinkage void spurious_interrupt(void); extern asmlinkage void thermal_interrupt(void); extern asmlinkage void reschedule_interrupt(void); -extern asmlinkage void invalidate_interrupt(void); -extern asmlinkage void invalidate_interrupt0(void); -extern asmlinkage void invalidate_interrupt1(void); -extern asmlinkage void invalidate_interrupt2(void); -extern asmlinkage void invalidate_interrupt3(void); -extern asmlinkage void invalidate_interrupt4(void); -extern asmlinkage void invalidate_interrupt5(void); -extern asmlinkage void invalidate_interrupt6(void); -extern asmlinkage void invalidate_interrupt7(void); -extern asmlinkage void invalidate_interrupt8(void); -extern asmlinkage void invalidate_interrupt9(void); -extern asmlinkage void invalidate_interrupt10(void); -extern asmlinkage void invalidate_interrupt11(void); -extern asmlinkage void invalidate_interrupt12(void); -extern asmlinkage void invalidate_interrupt13(void); -extern asmlinkage void invalidate_interrupt14(void); -extern asmlinkage void invalidate_interrupt15(void); -extern asmlinkage void invalidate_interrupt16(void); -extern asmlinkage void invalidate_interrupt17(void); -extern asmlinkage void invalidate_interrupt18(void); -extern asmlinkage void invalidate_interrupt19(void); -extern asmlinkage void invalidate_interrupt20(void); -extern asmlinkage void invalidate_interrupt21(void); -extern asmlinkage void invalidate_interrupt22(void); -extern asmlinkage void invalidate_interrupt23(void); -extern asmlinkage void invalidate_interrupt24(void); -extern asmlinkage void invalidate_interrupt25(void); -extern asmlinkage void invalidate_interrupt26(void); -extern asmlinkage void invalidate_interrupt27(void); -extern asmlinkage void invalidate_interrupt28(void); -extern asmlinkage void invalidate_interrupt29(void); -extern asmlinkage void invalidate_interrupt30(void); -extern asmlinkage void invalidate_interrupt31(void); - extern asmlinkage void irq_move_cleanup_interrupt(void); extern asmlinkage void reboot_interrupt(void); extern asmlinkage void threshold_interrupt(void); +extern asmlinkage void deferred_error_interrupt(void); extern asmlinkage void call_function_interrupt(void); extern asmlinkage void call_function_single_interrupt(void); @@ -87,60 +55,93 @@ extern void trace_spurious_interrupt(void); extern void trace_thermal_interrupt(void); extern void trace_reschedule_interrupt(void); extern void trace_threshold_interrupt(void); +extern void trace_deferred_error_interrupt(void); extern void trace_call_function_interrupt(void); extern void trace_call_function_single_interrupt(void); #define trace_irq_move_cleanup_interrupt irq_move_cleanup_interrupt #define trace_reboot_interrupt reboot_interrupt #define trace_kvm_posted_intr_ipi kvm_posted_intr_ipi +#define trace_kvm_posted_intr_wakeup_ipi kvm_posted_intr_wakeup_ipi #endif /* CONFIG_TRACING */ -#ifdef CONFIG_IRQ_REMAP -/* Intel specific interrupt remapping information */ -struct irq_2_iommu { - struct intel_iommu *iommu; - u16 irte_index; - u16 sub_handle; - u8 irte_mask; -}; - -/* AMD specific interrupt remapping information */ -struct irq_2_irte { - u16 devid; /* Device ID for IRTE table */ - u16 index; /* Index into IRTE table*/ -}; -#endif /* CONFIG_IRQ_REMAP */ - #ifdef CONFIG_X86_LOCAL_APIC struct irq_data; +struct pci_dev; +struct msi_desc; + +enum irq_alloc_type { + X86_IRQ_ALLOC_TYPE_IOAPIC = 1, + X86_IRQ_ALLOC_TYPE_HPET, + X86_IRQ_ALLOC_TYPE_MSI, + X86_IRQ_ALLOC_TYPE_MSIX, + X86_IRQ_ALLOC_TYPE_DMAR, + X86_IRQ_ALLOC_TYPE_UV, +}; -struct irq_cfg { - cpumask_var_t domain; - cpumask_var_t old_domain; - u8 vector; - u8 move_in_progress : 1; -#ifdef CONFIG_IRQ_REMAP - u8 remapped : 1; +struct irq_alloc_info { + enum irq_alloc_type type; + u32 flags; + const struct cpumask *mask; /* CPU mask for vector allocation */ union { - struct irq_2_iommu irq_2_iommu; - struct irq_2_irte irq_2_irte; - }; + int unused; +#ifdef CONFIG_HPET_TIMER + struct { + int hpet_id; + int hpet_index; + void *hpet_data; + }; #endif - union { -#ifdef CONFIG_X86_IO_APIC +#ifdef CONFIG_PCI_MSI struct { - struct list_head irq_2_pin; + struct pci_dev *msi_dev; + irq_hw_number_t msi_hwirq; + }; +#endif +#ifdef CONFIG_X86_IO_APIC + struct { + int ioapic_id; + int ioapic_pin; + int ioapic_node; + u32 ioapic_trigger : 1; + u32 ioapic_polarity : 1; + u32 ioapic_valid : 1; + struct IO_APIC_route_entry *ioapic_entry; + }; +#endif +#ifdef CONFIG_DMAR_TABLE + struct { + int dmar_id; + void *dmar_data; + }; +#endif +#ifdef CONFIG_HT_IRQ + struct { + int ht_pos; + int ht_idx; + struct pci_dev *ht_dev; + void *ht_update; + }; +#endif +#ifdef CONFIG_X86_UV + struct { + int uv_limit; + int uv_blade; + unsigned long uv_offset; + char *uv_name; }; #endif }; }; +struct irq_cfg { + unsigned int dest_apicid; + u8 vector; +}; + extern struct irq_cfg *irq_cfg(unsigned int irq); extern struct irq_cfg *irqd_cfg(struct irq_data *irq_data); -extern struct irq_cfg *alloc_irq_and_cfg_at(unsigned int at, int node); extern void lock_vector_lock(void); extern void unlock_vector_lock(void); -extern int assign_irq_vector(int, struct irq_cfg *, const struct cpumask *); -extern void clear_irq_vector(int irq, struct irq_cfg *cfg); extern void setup_vector_irq(int cpu); #ifdef CONFIG_SMP extern void send_cleanup_vector(struct irq_cfg *); @@ -150,10 +151,7 @@ static inline void send_cleanup_vector(struct irq_cfg *c) { } static inline void irq_complete_move(struct irq_cfg *c) { } #endif -extern int apic_retrigger_irq(struct irq_data *data); extern void apic_ack_edge(struct irq_data *data); -extern int apic_set_affinity(struct irq_data *data, const struct cpumask *mask, - unsigned int *dest_id); #else /* CONFIG_X86_LOCAL_APIC */ static inline void lock_vector_lock(void) {} static inline void unlock_vector_lock(void) {} @@ -163,8 +161,7 @@ static inline void unlock_vector_lock(void) {} extern atomic_t irq_err_count; extern atomic_t irq_mis_count; -/* EISA */ -extern void eisa_set_level_irq(unsigned int irq); +extern void elcr_set_level_irq(unsigned int irq); /* SMP */ extern __visible void smp_apic_timer_interrupt(struct pt_regs *); @@ -178,7 +175,6 @@ extern asmlinkage void smp_irq_move_cleanup_interrupt(void); extern __visible void smp_reschedule_interrupt(struct pt_regs *); extern __visible void smp_call_function_interrupt(struct pt_regs *); extern __visible void smp_call_function_single_interrupt(struct pt_regs *); -extern __visible void smp_invalidate_interrupt(struct pt_regs *); #endif extern char irq_entries_start[]; diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h index 34a5b93..83ec9b1 100644 --- a/arch/x86/include/asm/io.h +++ b/arch/x86/include/asm/io.h @@ -35,11 +35,13 @@ */ #define ARCH_HAS_IOREMAP_WC +#define ARCH_HAS_IOREMAP_WT #include <linux/string.h> #include <linux/compiler.h> #include <asm/page.h> #include <asm/early_ioremap.h> +#include <asm/pgtable_types.h> #define build_mmio_read(name, size, type, reg, barrier) \ static inline type name(const volatile void __iomem *addr) \ @@ -177,6 +179,7 @@ static inline unsigned int isa_virt_to_bus(volatile void *address) * look at pci_iomap(). */ extern void __iomem *ioremap_nocache(resource_size_t offset, unsigned long size); +extern void __iomem *ioremap_uc(resource_size_t offset, unsigned long size); extern void __iomem *ioremap_cache(resource_size_t offset, unsigned long size); extern void __iomem *ioremap_prot(resource_size_t offset, unsigned long size, unsigned long prot_val); @@ -197,8 +200,6 @@ extern void set_iounmap_nonlazy(void); #include <asm-generic/iomap.h> -#include <linux/vmalloc.h> - /* * Convert a virtual cached pointer to an uncached pointer */ @@ -320,6 +321,7 @@ extern void unxlate_dev_mem_ptr(phys_addr_t phys, void *addr); extern int ioremap_change_attr(unsigned long vaddr, unsigned long size, enum page_cache_mode pcm); extern void __iomem *ioremap_wc(resource_size_t offset, unsigned long size); +extern void __iomem *ioremap_wt(resource_size_t offset, unsigned long size); extern bool is_early_ioremap_ptep(pte_t *ptep); @@ -338,6 +340,9 @@ extern bool xen_biovec_phys_mergeable(const struct bio_vec *vec1, #define IO_SPACE_LIMIT 0xffff #ifdef CONFIG_MTRR +extern int __must_check arch_phys_wc_index(int handle); +#define arch_phys_wc_index arch_phys_wc_index + extern int __must_check arch_phys_wc_add(unsigned long base, unsigned long size); extern void arch_phys_wc_del(int handle); diff --git a/arch/x86/include/asm/io_apic.h b/arch/x86/include/asm/io_apic.h index 2f91685..6cbf2cf 100644 --- a/arch/x86/include/asm/io_apic.h +++ b/arch/x86/include/asm/io_apic.h @@ -95,9 +95,22 @@ struct IR_IO_APIC_route_entry { index : 15; } __attribute__ ((packed)); -#define IOAPIC_AUTO -1 -#define IOAPIC_EDGE 0 -#define IOAPIC_LEVEL 1 +struct irq_alloc_info; +struct ioapic_domain_cfg; + +#define IOAPIC_AUTO -1 +#define IOAPIC_EDGE 0 +#define IOAPIC_LEVEL 1 + +#define IOAPIC_MASKED 1 +#define IOAPIC_UNMASKED 0 + +#define IOAPIC_POL_HIGH 0 +#define IOAPIC_POL_LOW 1 + +#define IOAPIC_DEST_MODE_PHYSICAL 0 +#define IOAPIC_DEST_MODE_LOGICAL 1 + #define IOAPIC_MAP_ALLOC 0x1 #define IOAPIC_MAP_CHECK 0x2 @@ -110,9 +123,6 @@ extern int nr_ioapics; extern int mpc_ioapic_id(int ioapic); extern unsigned int mpc_ioapic_addr(int ioapic); -extern struct mp_ioapic_gsi *mp_ioapic_gsi_routing(int ioapic); - -#define MP_MAX_IOAPIC_PIN 127 /* # of MP IRQ source entries */ extern int mp_irq_entries; @@ -120,9 +130,6 @@ extern int mp_irq_entries; /* MP IRQ source entries */ extern struct mpc_intsrc mp_irqs[MAX_IRQ_SOURCES]; -/* Older SiS APIC requires we rewrite the index register */ -extern int sis_apic_bug; - /* 1 if "noapic" boot option passed */ extern int skip_ioapic_setup; @@ -132,6 +139,8 @@ extern int noioapicquirk; /* -1 if "noapic" boot option passed */ extern int noioapicreroute; +extern u32 gsi_top; + extern unsigned long io_apic_irqs; #define IO_APIC_IRQ(x) (((x) >= NR_IRQS_LEGACY) || ((1 << (x)) & io_apic_irqs)) @@ -147,13 +156,6 @@ struct irq_cfg; extern void ioapic_insert_resources(void); extern int arch_early_ioapic_init(void); -extern int native_setup_ioapic_entry(int, struct IO_APIC_route_entry *, - unsigned int, int, - struct io_apic_irq_attr *); -extern void eoi_ioapic_irq(unsigned int irq, struct irq_cfg *cfg); - -extern void native_eoi_ioapic_pin(int apic, int pin, int vector); - extern int save_ioapic_entries(void); extern void mask_ioapic_entries(void); extern int restore_ioapic_entries(void); @@ -161,82 +163,32 @@ extern int restore_ioapic_entries(void); extern void setup_ioapic_ids_from_mpc(void); extern void setup_ioapic_ids_from_mpc_nocheck(void); -struct io_apic_irq_attr { - int ioapic; - int ioapic_pin; - int trigger; - int polarity; -}; - -enum ioapic_domain_type { - IOAPIC_DOMAIN_INVALID, - IOAPIC_DOMAIN_LEGACY, - IOAPIC_DOMAIN_STRICT, - IOAPIC_DOMAIN_DYNAMIC, -}; - -struct device_node; -struct irq_domain; -struct irq_domain_ops; - -struct ioapic_domain_cfg { - enum ioapic_domain_type type; - const struct irq_domain_ops *ops; - struct device_node *dev; -}; - -struct mp_ioapic_gsi{ - u32 gsi_base; - u32 gsi_end; -}; -extern u32 gsi_top; - extern int mp_find_ioapic(u32 gsi); extern int mp_find_ioapic_pin(int ioapic, u32 gsi); -extern u32 mp_pin_to_gsi(int ioapic, int pin); -extern int mp_map_gsi_to_irq(u32 gsi, unsigned int flags); +extern int mp_map_gsi_to_irq(u32 gsi, unsigned int flags, + struct irq_alloc_info *info); extern void mp_unmap_irq(int irq); extern int mp_register_ioapic(int id, u32 address, u32 gsi_base, struct ioapic_domain_cfg *cfg); extern int mp_unregister_ioapic(u32 gsi_base); extern int mp_ioapic_registered(u32 gsi_base); -extern int mp_irqdomain_map(struct irq_domain *domain, unsigned int virq, - irq_hw_number_t hwirq); -extern void mp_irqdomain_unmap(struct irq_domain *domain, unsigned int virq); -extern int mp_set_gsi_attr(u32 gsi, int trigger, int polarity, int node); -extern void __init pre_init_apic_IRQ0(void); + +extern void ioapic_set_alloc_attr(struct irq_alloc_info *info, + int node, int trigger, int polarity); extern void mp_save_irq(struct mpc_intsrc *m); extern void disable_ioapic_support(void); -extern void __init native_io_apic_init_mappings(void); +extern void __init io_apic_init_mappings(void); extern unsigned int native_io_apic_read(unsigned int apic, unsigned int reg); -extern void native_io_apic_write(unsigned int apic, unsigned int reg, unsigned int val); -extern void native_io_apic_modify(unsigned int apic, unsigned int reg, unsigned int val); extern void native_disable_io_apic(void); -extern void native_io_apic_print_entries(unsigned int apic, unsigned int nr_entries); -extern void intel_ir_io_apic_print_entries(unsigned int apic, unsigned int nr_entries); -extern int native_ioapic_set_affinity(struct irq_data *, - const struct cpumask *, - bool); static inline unsigned int io_apic_read(unsigned int apic, unsigned int reg) { return x86_io_apic_ops.read(apic, reg); } -static inline void io_apic_write(unsigned int apic, unsigned int reg, unsigned int value) -{ - x86_io_apic_ops.write(apic, reg, value); -} -static inline void io_apic_modify(unsigned int apic, unsigned int reg, unsigned int value) -{ - x86_io_apic_ops.modify(apic, reg, value); -} - -extern void io_apic_eoi(unsigned int apic, unsigned int vector); - extern void setup_IO_APIC(void); extern void enable_IO_APIC(void); extern void disable_IO_APIC(void); @@ -253,8 +205,12 @@ static inline int arch_early_ioapic_init(void) { return 0; } static inline void print_IO_APICs(void) {} #define gsi_top (NR_IRQS_LEGACY) static inline int mp_find_ioapic(u32 gsi) { return 0; } -static inline u32 mp_pin_to_gsi(int ioapic, int pin) { return UINT_MAX; } -static inline int mp_map_gsi_to_irq(u32 gsi, unsigned int flags) { return gsi; } +static inline int mp_map_gsi_to_irq(u32 gsi, unsigned int flags, + struct irq_alloc_info *info) +{ + return gsi; +} + static inline void mp_unmap_irq(int irq) { } static inline int save_ioapic_entries(void) @@ -268,17 +224,11 @@ static inline int restore_ioapic_entries(void) return -ENOMEM; } -static inline void mp_save_irq(struct mpc_intsrc *m) { }; +static inline void mp_save_irq(struct mpc_intsrc *m) { } static inline void disable_ioapic_support(void) { } -#define native_io_apic_init_mappings NULL +static inline void io_apic_init_mappings(void) { } #define native_io_apic_read NULL -#define native_io_apic_write NULL -#define native_io_apic_modify NULL #define native_disable_io_apic NULL -#define native_io_apic_print_entries NULL -#define native_ioapic_set_affinity NULL -#define native_setup_ioapic_entry NULL -#define native_eoi_ioapic_pin NULL static inline void setup_IO_APIC(void) { } static inline void enable_IO_APIC(void) { } diff --git a/arch/x86/include/asm/irq.h b/arch/x86/include/asm/irq.h index a80cbb8..8008d06 100644 --- a/arch/x86/include/asm/irq.h +++ b/arch/x86/include/asm/irq.h @@ -30,6 +30,10 @@ extern void fixup_irqs(void); extern void irq_force_complete_move(int); #endif +#ifdef CONFIG_HAVE_KVM +extern void kvm_set_posted_intr_wakeup_handler(void (*handler)(void)); +#endif + extern void (*x86_platform_ipi_callback)(void); extern void native_init_IRQ(void); extern bool handle_irq(unsigned irq, struct pt_regs *regs); diff --git a/arch/x86/include/asm/irq_remapping.h b/arch/x86/include/asm/irq_remapping.h index 6224d31..046c7fb 100644 --- a/arch/x86/include/asm/irq_remapping.h +++ b/arch/x86/include/asm/irq_remapping.h @@ -22,84 +22,72 @@ #ifndef __X86_IRQ_REMAPPING_H #define __X86_IRQ_REMAPPING_H +#include <asm/irqdomain.h> +#include <asm/hw_irq.h> #include <asm/io_apic.h> -struct IO_APIC_route_entry; -struct io_apic_irq_attr; -struct irq_chip; struct msi_msg; -struct pci_dev; -struct irq_cfg; +struct irq_alloc_info; + +enum irq_remap_cap { + IRQ_POSTING_CAP = 0, +}; #ifdef CONFIG_IRQ_REMAP +extern bool irq_remapping_cap(enum irq_remap_cap cap); extern void set_irq_remapping_broken(void); extern int irq_remapping_prepare(void); extern int irq_remapping_enable(void); extern void irq_remapping_disable(void); extern int irq_remapping_reenable(int); extern int irq_remap_enable_fault_handling(void); -extern int setup_ioapic_remapped_entry(int irq, - struct IO_APIC_route_entry *entry, - unsigned int destination, - int vector, - struct io_apic_irq_attr *attr); -extern void free_remapped_irq(int irq); -extern void compose_remapped_msi_msg(struct pci_dev *pdev, - unsigned int irq, unsigned int dest, - struct msi_msg *msg, u8 hpet_id); -extern int setup_hpet_msi_remapped(unsigned int irq, unsigned int id); extern void panic_if_irq_remap(const char *msg); -extern bool setup_remapped_irq(int irq, - struct irq_cfg *cfg, - struct irq_chip *chip); -void irq_remap_modify_chip_defaults(struct irq_chip *chip); +extern struct irq_domain * +irq_remapping_get_ir_irq_domain(struct irq_alloc_info *info); +extern struct irq_domain * +irq_remapping_get_irq_domain(struct irq_alloc_info *info); + +/* Create PCI MSI/MSIx irqdomain, use @parent as the parent irqdomain. */ +extern struct irq_domain *arch_create_msi_irq_domain(struct irq_domain *parent); + +/* Get parent irqdomain for interrupt remapping irqdomain */ +static inline struct irq_domain *arch_get_ir_parent_domain(void) +{ + return x86_vector_domain; +} + +struct vcpu_data { + u64 pi_desc_addr; /* Physical address of PI Descriptor */ + u32 vector; /* Guest vector of the interrupt */ +}; #else /* CONFIG_IRQ_REMAP */ +static inline bool irq_remapping_cap(enum irq_remap_cap cap) { return 0; } static inline void set_irq_remapping_broken(void) { } static inline int irq_remapping_prepare(void) { return -ENODEV; } static inline int irq_remapping_enable(void) { return -ENODEV; } static inline void irq_remapping_disable(void) { } static inline int irq_remapping_reenable(int eim) { return -ENODEV; } static inline int irq_remap_enable_fault_handling(void) { return -ENODEV; } -static inline int setup_ioapic_remapped_entry(int irq, - struct IO_APIC_route_entry *entry, - unsigned int destination, - int vector, - struct io_apic_irq_attr *attr) -{ - return -ENODEV; -} -static inline void free_remapped_irq(int irq) { } -static inline void compose_remapped_msi_msg(struct pci_dev *pdev, - unsigned int irq, unsigned int dest, - struct msi_msg *msg, u8 hpet_id) -{ -} -static inline int setup_hpet_msi_remapped(unsigned int irq, unsigned int id) -{ - return -ENODEV; -} static inline void panic_if_irq_remap(const char *msg) { } -static inline void irq_remap_modify_chip_defaults(struct irq_chip *chip) +static inline struct irq_domain * +irq_remapping_get_ir_irq_domain(struct irq_alloc_info *info) { + return NULL; } -static inline bool setup_remapped_irq(int irq, - struct irq_cfg *cfg, - struct irq_chip *chip) +static inline struct irq_domain * +irq_remapping_get_irq_domain(struct irq_alloc_info *info) { - return false; + return NULL; } -#endif /* CONFIG_IRQ_REMAP */ - -#define dmar_alloc_hwirq() irq_alloc_hwirq(-1) -#define dmar_free_hwirq irq_free_hwirq +#endif /* CONFIG_IRQ_REMAP */ #endif /* __X86_IRQ_REMAPPING_H */ diff --git a/arch/x86/include/asm/irq_vectors.h b/arch/x86/include/asm/irq_vectors.h index 666c89e..4c2d2eb 100644 --- a/arch/x86/include/asm/irq_vectors.h +++ b/arch/x86/include/asm/irq_vectors.h @@ -47,31 +47,12 @@ #define IRQ_MOVE_CLEANUP_VECTOR FIRST_EXTERNAL_VECTOR #define IA32_SYSCALL_VECTOR 0x80 -#ifdef CONFIG_X86_32 -# define SYSCALL_VECTOR 0x80 -#endif /* * Vectors 0x30-0x3f are used for ISA interrupts. * round up to the next 16-vector boundary */ -#define IRQ0_VECTOR ((FIRST_EXTERNAL_VECTOR + 16) & ~15) - -#define IRQ1_VECTOR (IRQ0_VECTOR + 1) -#define IRQ2_VECTOR (IRQ0_VECTOR + 2) -#define IRQ3_VECTOR (IRQ0_VECTOR + 3) -#define IRQ4_VECTOR (IRQ0_VECTOR + 4) -#define IRQ5_VECTOR (IRQ0_VECTOR + 5) -#define IRQ6_VECTOR (IRQ0_VECTOR + 6) -#define IRQ7_VECTOR (IRQ0_VECTOR + 7) -#define IRQ8_VECTOR (IRQ0_VECTOR + 8) -#define IRQ9_VECTOR (IRQ0_VECTOR + 9) -#define IRQ10_VECTOR (IRQ0_VECTOR + 10) -#define IRQ11_VECTOR (IRQ0_VECTOR + 11) -#define IRQ12_VECTOR (IRQ0_VECTOR + 12) -#define IRQ13_VECTOR (IRQ0_VECTOR + 13) -#define IRQ14_VECTOR (IRQ0_VECTOR + 14) -#define IRQ15_VECTOR (IRQ0_VECTOR + 15) +#define ISA_IRQ_VECTOR(irq) (((FIRST_EXTERNAL_VECTOR + 16) & ~15) + irq) /* * Special IRQ vectors used by the SMP architecture, 0xf0-0xff @@ -102,21 +83,23 @@ */ #define X86_PLATFORM_IPI_VECTOR 0xf7 -/* Vector for KVM to deliver posted interrupt IPI */ -#ifdef CONFIG_HAVE_KVM -#define POSTED_INTR_VECTOR 0xf2 -#endif - +#define POSTED_INTR_WAKEUP_VECTOR 0xf1 /* * IRQ work vector: */ #define IRQ_WORK_VECTOR 0xf6 #define UV_BAU_MESSAGE 0xf5 +#define DEFERRED_ERROR_VECTOR 0xf4 /* Vector on which hypervisor callbacks will be delivered */ #define HYPERVISOR_CALLBACK_VECTOR 0xf3 +/* Vector for KVM to deliver posted interrupt IPI */ +#ifdef CONFIG_HAVE_KVM +#define POSTED_INTR_VECTOR 0xf2 +#endif + /* * Local APIC timer IRQ vector is on a different priority level, * to work around the 'lost local interrupt if more than 2 IRQ @@ -155,18 +138,22 @@ static inline int invalid_vm86_irq(int irq) * static arrays. */ -#define NR_IRQS_LEGACY 16 +#define NR_IRQS_LEGACY 16 -#define IO_APIC_VECTOR_LIMIT ( 32 * MAX_IO_APICS ) +#define CPU_VECTOR_LIMIT (64 * NR_CPUS) +#define IO_APIC_VECTOR_LIMIT (32 * MAX_IO_APICS) -#ifdef CONFIG_X86_IO_APIC -# define CPU_VECTOR_LIMIT (64 * NR_CPUS) -# define NR_IRQS \ +#if defined(CONFIG_X86_IO_APIC) && defined(CONFIG_PCI_MSI) +#define NR_IRQS \ (CPU_VECTOR_LIMIT > IO_APIC_VECTOR_LIMIT ? \ (NR_VECTORS + CPU_VECTOR_LIMIT) : \ (NR_VECTORS + IO_APIC_VECTOR_LIMIT)) -#else /* !CONFIG_X86_IO_APIC: */ -# define NR_IRQS NR_IRQS_LEGACY +#elif defined(CONFIG_X86_IO_APIC) +#define NR_IRQS (NR_VECTORS + IO_APIC_VECTOR_LIMIT) +#elif defined(CONFIG_PCI_MSI) +#define NR_IRQS (NR_VECTORS + CPU_VECTOR_LIMIT) +#else +#define NR_IRQS NR_IRQS_LEGACY #endif #endif /* _ASM_X86_IRQ_VECTORS_H */ diff --git a/arch/x86/include/asm/irqdomain.h b/arch/x86/include/asm/irqdomain.h new file mode 100644 index 0000000..d26075b --- /dev/null +++ b/arch/x86/include/asm/irqdomain.h @@ -0,0 +1,63 @@ +#ifndef _ASM_IRQDOMAIN_H +#define _ASM_IRQDOMAIN_H + +#include <linux/irqdomain.h> +#include <asm/hw_irq.h> + +#ifdef CONFIG_X86_LOCAL_APIC +enum { + /* Allocate contiguous CPU vectors */ + X86_IRQ_ALLOC_CONTIGUOUS_VECTORS = 0x1, +}; + +extern struct irq_domain *x86_vector_domain; + +extern void init_irq_alloc_info(struct irq_alloc_info *info, + const struct cpumask *mask); +extern void copy_irq_alloc_info(struct irq_alloc_info *dst, + struct irq_alloc_info *src); +#endif /* CONFIG_X86_LOCAL_APIC */ + +#ifdef CONFIG_X86_IO_APIC +struct device_node; +struct irq_data; + +enum ioapic_domain_type { + IOAPIC_DOMAIN_INVALID, + IOAPIC_DOMAIN_LEGACY, + IOAPIC_DOMAIN_STRICT, + IOAPIC_DOMAIN_DYNAMIC, +}; + +struct ioapic_domain_cfg { + enum ioapic_domain_type type; + const struct irq_domain_ops *ops; + struct device_node *dev; +}; + +extern const struct irq_domain_ops mp_ioapic_irqdomain_ops; + +extern int mp_irqdomain_alloc(struct irq_domain *domain, unsigned int virq, + unsigned int nr_irqs, void *arg); +extern void mp_irqdomain_free(struct irq_domain *domain, unsigned int virq, + unsigned int nr_irqs); +extern void mp_irqdomain_activate(struct irq_domain *domain, + struct irq_data *irq_data); +extern void mp_irqdomain_deactivate(struct irq_domain *domain, + struct irq_data *irq_data); +extern int mp_irqdomain_ioapic_idx(struct irq_domain *domain); +#endif /* CONFIG_X86_IO_APIC */ + +#ifdef CONFIG_PCI_MSI +extern void arch_init_msi_domain(struct irq_domain *domain); +#else +static inline void arch_init_msi_domain(struct irq_domain *domain) { } +#endif + +#ifdef CONFIG_HT_IRQ +extern void arch_init_htirq_domain(struct irq_domain *domain); +#else +static inline void arch_init_htirq_domain(struct irq_domain *domain) { } +#endif + +#endif diff --git a/arch/x86/include/asm/mce.h b/arch/x86/include/asm/mce.h index 1f5a86d..982dfc3 100644 --- a/arch/x86/include/asm/mce.h +++ b/arch/x86/include/asm/mce.h @@ -17,11 +17,16 @@ #define MCG_EXT_CNT(c) (((c) & MCG_EXT_CNT_MASK) >> MCG_EXT_CNT_SHIFT) #define MCG_SER_P (1ULL<<24) /* MCA recovery/new status bits */ #define MCG_ELOG_P (1ULL<<26) /* Extended error log supported */ +#define MCG_LMCE_P (1ULL<<27) /* Local machine check supported */ /* MCG_STATUS register defines */ #define MCG_STATUS_RIPV (1ULL<<0) /* restart ip valid */ #define MCG_STATUS_EIPV (1ULL<<1) /* ip points to correct instruction */ #define MCG_STATUS_MCIP (1ULL<<2) /* machine check in progress */ +#define MCG_STATUS_LMCES (1ULL<<3) /* LMCE signaled */ + +/* MCG_EXT_CTL register defines */ +#define MCG_EXT_CTL_LMCE_EN (1ULL<<0) /* Enable LMCE */ /* MCi_STATUS register defines */ #define MCI_STATUS_VAL (1ULL<<63) /* valid error */ @@ -104,6 +109,7 @@ struct mce_log { struct mca_config { bool dont_log_ce; bool cmci_disabled; + bool lmce_disabled; bool ignore_ce; bool disabled; bool ser; @@ -117,8 +123,19 @@ struct mca_config { }; struct mce_vendor_flags { - __u64 overflow_recov : 1, /* cpuid_ebx(80000007) */ - __reserved_0 : 63; + /* + * overflow recovery cpuid bit indicates that overflow + * conditions are not fatal + */ + __u64 overflow_recov : 1, + + /* + * SUCCOR stands for S/W UnCorrectable error COntainment + * and Recovery. It indicates support for data poisoning + * in HW and deferred error interrupts. + */ + succor : 1, + __reserved_0 : 62; }; extern struct mce_vendor_flags mce_flags; @@ -168,12 +185,16 @@ void cmci_clear(void); void cmci_reenable(void); void cmci_rediscover(void); void cmci_recheck(void); +void lmce_clear(void); +void lmce_enable(void); #else static inline void mce_intel_feature_init(struct cpuinfo_x86 *c) { } static inline void cmci_clear(void) {} static inline void cmci_reenable(void) {} static inline void cmci_rediscover(void) {} static inline void cmci_recheck(void) {} +static inline void lmce_clear(void) {} +static inline void lmce_enable(void) {} #endif #ifdef CONFIG_X86_MCE_AMD @@ -223,6 +244,9 @@ void do_machine_check(struct pt_regs *, long); extern void (*mce_threshold_vector)(void); extern void (*threshold_cpu_callback)(unsigned long action, unsigned int cpu); +/* Deferred error interrupt handler */ +extern void (*deferred_error_int_vector)(void); + /* * Thermal handler */ diff --git a/arch/x86/include/asm/msi.h b/arch/x86/include/asm/msi.h new file mode 100644 index 0000000..93724cc --- /dev/null +++ b/arch/x86/include/asm/msi.h @@ -0,0 +1,7 @@ +#ifndef _ASM_X86_MSI_H +#define _ASM_X86_MSI_H +#include <asm/hw_irq.h> + +typedef struct irq_alloc_info msi_alloc_info_t; + +#endif /* _ASM_X86_MSI_H */ diff --git a/arch/x86/include/uapi/asm/msr-index.h b/arch/x86/include/asm/msr-index.h index 3c6bb34..9ebc3d0 100644 --- a/arch/x86/include/uapi/asm/msr-index.h +++ b/arch/x86/include/asm/msr-index.h @@ -56,6 +56,7 @@ #define MSR_IA32_MCG_CAP 0x00000179 #define MSR_IA32_MCG_STATUS 0x0000017a #define MSR_IA32_MCG_CTL 0x0000017b +#define MSR_IA32_MCG_EXT_CTL 0x000004d0 #define MSR_OFFCORE_RSP_0 0x000001a6 #define MSR_OFFCORE_RSP_1 0x000001a7 @@ -380,6 +381,7 @@ #define FEATURE_CONTROL_LOCKED (1<<0) #define FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX (1<<1) #define FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX (1<<2) +#define FEATURE_CONTROL_LMCE (1<<20) #define MSR_IA32_APICBASE 0x0000001b #define MSR_IA32_APICBASE_BSP (1<<8) diff --git a/arch/x86/include/asm/msr.h b/arch/x86/include/asm/msr.h index de36f22..e6a707e 100644 --- a/arch/x86/include/asm/msr.h +++ b/arch/x86/include/asm/msr.h @@ -1,13 +1,14 @@ #ifndef _ASM_X86_MSR_H #define _ASM_X86_MSR_H -#include <uapi/asm/msr.h> +#include "msr-index.h" #ifndef __ASSEMBLY__ #include <asm/asm.h> #include <asm/errno.h> #include <asm/cpumask.h> +#include <uapi/asm/msr.h> struct msr { union { @@ -205,8 +206,13 @@ do { \ #endif /* !CONFIG_PARAVIRT */ -#define wrmsrl_safe(msr, val) wrmsr_safe((msr), (u32)(val), \ - (u32)((val) >> 32)) +/* + * 64-bit version of wrmsr_safe(): + */ +static inline int wrmsrl_safe(u32 msr, u64 val) +{ + return wrmsr_safe(msr, (u32)val, (u32)(val >> 32)); +} #define write_tsc(low, high) wrmsr(MSR_IA32_TSC, (low), (high)) diff --git a/arch/x86/include/asm/mtrr.h b/arch/x86/include/asm/mtrr.h index f768f62..b94f6f6 100644 --- a/arch/x86/include/asm/mtrr.h +++ b/arch/x86/include/asm/mtrr.h @@ -31,7 +31,7 @@ * arch_phys_wc_add and arch_phys_wc_del. */ # ifdef CONFIG_MTRR -extern u8 mtrr_type_lookup(u64 addr, u64 end); +extern u8 mtrr_type_lookup(u64 addr, u64 end, u8 *uniform); extern void mtrr_save_fixed_ranges(void *); extern void mtrr_save_state(void); extern int mtrr_add(unsigned long base, unsigned long size, @@ -48,14 +48,13 @@ extern void mtrr_aps_init(void); extern void mtrr_bp_restore(void); extern int mtrr_trim_uncached_memory(unsigned long end_pfn); extern int amd_special_default_mtrr(void); -extern int phys_wc_to_mtrr_index(int handle); # else -static inline u8 mtrr_type_lookup(u64 addr, u64 end) +static inline u8 mtrr_type_lookup(u64 addr, u64 end, u8 *uniform) { /* * Return no-MTRRs: */ - return 0xff; + return MTRR_TYPE_INVALID; } #define mtrr_save_fixed_ranges(arg) do {} while (0) #define mtrr_save_state() do {} while (0) @@ -84,10 +83,6 @@ static inline int mtrr_trim_uncached_memory(unsigned long end_pfn) static inline void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi) { } -static inline int phys_wc_to_mtrr_index(int handle) -{ - return -1; -} #define mtrr_ap_init() do {} while (0) #define mtrr_bp_init() do {} while (0) @@ -127,4 +122,8 @@ struct mtrr_gentry32 { _IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry32) #endif /* CONFIG_COMPAT */ +/* Bit fields for enabled in struct mtrr_state_type */ +#define MTRR_STATE_MTRR_FIXED_ENABLED 0x01 +#define MTRR_STATE_MTRR_ENABLED 0x02 + #endif /* _ASM_X86_MTRR_H */ diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h index 8766c7c..a6b8f9f 100644 --- a/arch/x86/include/asm/paravirt_types.h +++ b/arch/x86/include/asm/paravirt_types.h @@ -160,13 +160,14 @@ struct pv_cpu_ops { u64 (*read_pmc)(int counter); unsigned long long (*read_tscp)(unsigned int *aux); +#ifdef CONFIG_X86_32 /* * Atomically enable interrupts and return to userspace. This - * is only ever used to return to 32-bit processes; in a - * 64-bit kernel, it's used for 32-on-64 compat processes, but - * never native 64-bit processes. (Jump, not call.) + * is only used in 32-bit kernels. 64-bit kernels use + * usergs_sysret32 instead. */ void (*irq_enable_sysexit)(void); +#endif /* * Switch to usermode gs and return to 64-bit usermode using diff --git a/arch/x86/include/asm/pat.h b/arch/x86/include/asm/pat.h index 91bc4ba..ca6c228 100644 --- a/arch/x86/include/asm/pat.h +++ b/arch/x86/include/asm/pat.h @@ -4,14 +4,9 @@ #include <linux/types.h> #include <asm/pgtable_types.h> -#ifdef CONFIG_X86_PAT -extern int pat_enabled; -#else -static const int pat_enabled; -#endif - +bool pat_enabled(void); extern void pat_init(void); -void pat_init_cache_modes(void); +void pat_init_cache_modes(u64); extern int reserve_memtype(u64 start, u64 end, enum page_cache_mode req_pcm, enum page_cache_mode *ret_pcm); diff --git a/arch/x86/include/asm/pci.h b/arch/x86/include/asm/pci.h index 4e370a5..d8c80ff 100644 --- a/arch/x86/include/asm/pci.h +++ b/arch/x86/include/asm/pci.h @@ -96,15 +96,10 @@ extern void pci_iommu_alloc(void); #ifdef CONFIG_PCI_MSI /* implemented in arch/x86/kernel/apic/io_apic. */ struct msi_desc; -void native_compose_msi_msg(struct pci_dev *pdev, unsigned int irq, - unsigned int dest, struct msi_msg *msg, u8 hpet_id); int native_setup_msi_irqs(struct pci_dev *dev, int nvec, int type); void native_teardown_msi_irq(unsigned int irq); void native_restore_msi_irqs(struct pci_dev *dev); -int setup_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc, - unsigned int irq_base, unsigned int irq_offset); #else -#define native_compose_msi_msg NULL #define native_setup_msi_irqs NULL #define native_teardown_msi_irq NULL #endif diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h index fe57e7a..2562e30 100644 --- a/arch/x86/include/asm/pgtable.h +++ b/arch/x86/include/asm/pgtable.h @@ -398,11 +398,17 @@ static inline int is_new_memtype_allowed(u64 paddr, unsigned long size, * requested memtype: * - request is uncached, return cannot be write-back * - request is write-combine, return cannot be write-back + * - request is write-through, return cannot be write-back + * - request is write-through, return cannot be write-combine */ if ((pcm == _PAGE_CACHE_MODE_UC_MINUS && new_pcm == _PAGE_CACHE_MODE_WB) || (pcm == _PAGE_CACHE_MODE_WC && - new_pcm == _PAGE_CACHE_MODE_WB)) { + new_pcm == _PAGE_CACHE_MODE_WB) || + (pcm == _PAGE_CACHE_MODE_WT && + new_pcm == _PAGE_CACHE_MODE_WB) || + (pcm == _PAGE_CACHE_MODE_WT && + new_pcm == _PAGE_CACHE_MODE_WC)) { return 0; } diff --git a/arch/x86/include/asm/pgtable_types.h b/arch/x86/include/asm/pgtable_types.h index 78f0c8c..13f310b 100644 --- a/arch/x86/include/asm/pgtable_types.h +++ b/arch/x86/include/asm/pgtable_types.h @@ -367,6 +367,9 @@ extern int nx_enabled; #define pgprot_writecombine pgprot_writecombine extern pgprot_t pgprot_writecombine(pgprot_t prot); +#define pgprot_writethrough pgprot_writethrough +extern pgprot_t pgprot_writethrough(pgprot_t prot); + /* Indicate that x86 has its own track and untrack pfn vma functions */ #define __HAVE_PFNMAP_TRACKING diff --git a/arch/x86/include/asm/proto.h b/arch/x86/include/asm/proto.h index a90f897..a4a7728 100644 --- a/arch/x86/include/asm/proto.h +++ b/arch/x86/include/asm/proto.h @@ -5,12 +5,14 @@ /* misc architecture specific prototypes */ -void system_call(void); void syscall_init(void); -void ia32_syscall(void); -void ia32_cstar_target(void); -void ia32_sysenter_target(void); +void entry_SYSCALL_64(void); +void entry_SYSCALL_compat(void); +void entry_INT80_32(void); +void entry_INT80_compat(void); +void entry_SYSENTER_32(void); +void entry_SYSENTER_compat(void); void x86_configure_nx(void); void x86_report_nx(void); diff --git a/arch/x86/include/asm/special_insns.h b/arch/x86/include/asm/special_insns.h index aeb4666e..2270e41 100644 --- a/arch/x86/include/asm/special_insns.h +++ b/arch/x86/include/asm/special_insns.h @@ -215,6 +215,44 @@ static inline void clwb(volatile void *__p) : [pax] "a" (p)); } +/** + * pcommit_sfence() - persistent commit and fence + * + * The PCOMMIT instruction ensures that data that has been flushed from the + * processor's cache hierarchy with CLWB, CLFLUSHOPT or CLFLUSH is accepted to + * memory and is durable on the DIMM. The primary use case for this is + * persistent memory. + * + * This function shows how to properly use CLWB/CLFLUSHOPT/CLFLUSH and PCOMMIT + * with appropriate fencing. + * + * Example: + * void flush_and_commit_buffer(void *vaddr, unsigned int size) + * { + * unsigned long clflush_mask = boot_cpu_data.x86_clflush_size - 1; + * void *vend = vaddr + size; + * void *p; + * + * for (p = (void *)((unsigned long)vaddr & ~clflush_mask); + * p < vend; p += boot_cpu_data.x86_clflush_size) + * clwb(p); + * + * // SFENCE to order CLWB/CLFLUSHOPT/CLFLUSH cache flushes + * // MFENCE via mb() also works + * wmb(); + * + * // PCOMMIT and the required SFENCE for ordering + * pcommit_sfence(); + * } + * + * After this function completes the data pointed to by 'vaddr' has been + * accepted to memory and will be durable if the 'vaddr' points to persistent + * memory. + * + * PCOMMIT must always be ordered by an MFENCE or SFENCE, so to help simplify + * things we include both the PCOMMIT and the required SFENCE in the + * alternatives generated by pcommit_sfence(). + */ static inline void pcommit_sfence(void) { alternative(ASM_NOP7, diff --git a/arch/x86/include/asm/thread_info.h b/arch/x86/include/asm/thread_info.h index b4bdec3..225ee54 100644 --- a/arch/x86/include/asm/thread_info.h +++ b/arch/x86/include/asm/thread_info.h @@ -177,8 +177,6 @@ struct thread_info { */ #ifndef __ASSEMBLY__ -DECLARE_PER_CPU(unsigned long, kernel_stack); - static inline struct thread_info *current_thread_info(void) { return (struct thread_info *)(current_top_of_stack() - THREAD_SIZE); @@ -197,9 +195,13 @@ static inline unsigned long current_stack_pointer(void) #else /* !__ASSEMBLY__ */ +#ifdef CONFIG_X86_64 +# define cpu_current_top_of_stack (cpu_tss + TSS_sp0) +#endif + /* Load thread_info address into "reg" */ #define GET_THREAD_INFO(reg) \ - _ASM_MOV PER_CPU_VAR(kernel_stack),reg ; \ + _ASM_MOV PER_CPU_VAR(cpu_current_top_of_stack),reg ; \ _ASM_SUB $(THREAD_SIZE),reg ; /* diff --git a/arch/x86/include/asm/topology.h b/arch/x86/include/asm/topology.h index 5a77593f..0fb4648 100644 --- a/arch/x86/include/asm/topology.h +++ b/arch/x86/include/asm/topology.h @@ -26,7 +26,7 @@ #define _ASM_X86_TOPOLOGY_H #ifdef CONFIG_X86_32 -# ifdef CONFIG_X86_HT +# ifdef CONFIG_SMP # define ENABLE_TOPO_DEFINES # endif #else diff --git a/arch/x86/include/asm/trace/irq_vectors.h b/arch/x86/include/asm/trace/irq_vectors.h index 4cab890..38a09a1 100644 --- a/arch/x86/include/asm/trace/irq_vectors.h +++ b/arch/x86/include/asm/trace/irq_vectors.h @@ -101,6 +101,12 @@ DEFINE_IRQ_VECTOR_EVENT(call_function_single); DEFINE_IRQ_VECTOR_EVENT(threshold_apic); /* + * deferred_error_apic - called when entering/exiting a deferred apic interrupt + * vector handler + */ +DEFINE_IRQ_VECTOR_EVENT(deferred_error_apic); + +/* * thermal_apic - called when entering/exiting a thermal apic interrupt * vector handler */ diff --git a/arch/x86/include/asm/traps.h b/arch/x86/include/asm/traps.h index 4e49d7d..c5380be 100644 --- a/arch/x86/include/asm/traps.h +++ b/arch/x86/include/asm/traps.h @@ -108,7 +108,8 @@ extern int panic_on_unrecovered_nmi; void math_emulate(struct math_emu_info *); #ifndef CONFIG_X86_32 asmlinkage void smp_thermal_interrupt(void); -asmlinkage void mce_threshold_interrupt(void); +asmlinkage void smp_threshold_interrupt(void); +asmlinkage void smp_deferred_error_interrupt(void); #endif extern enum ctx_state ist_enter(struct pt_regs *regs); diff --git a/arch/x86/include/asm/uaccess_32.h b/arch/x86/include/asm/uaccess_32.h index 7c8ad34..f5dcb52 100644 --- a/arch/x86/include/asm/uaccess_32.h +++ b/arch/x86/include/asm/uaccess_32.h @@ -59,6 +59,10 @@ __copy_to_user_inatomic(void __user *to, const void *from, unsigned long n) __put_user_size(*(u32 *)from, (u32 __user *)to, 4, ret, 4); return ret; + case 8: + __put_user_size(*(u64 *)from, (u64 __user *)to, + 8, ret, 8); + return ret; } } return __copy_to_user_ll(to, from, n); diff --git a/arch/x86/include/asm/x86_init.h b/arch/x86/include/asm/x86_init.h index f58a9c7..48d34d2 100644 --- a/arch/x86/include/asm/x86_init.h +++ b/arch/x86/include/asm/x86_init.h @@ -171,38 +171,17 @@ struct x86_platform_ops { }; struct pci_dev; -struct msi_msg; struct x86_msi_ops { int (*setup_msi_irqs)(struct pci_dev *dev, int nvec, int type); - void (*compose_msi_msg)(struct pci_dev *dev, unsigned int irq, - unsigned int dest, struct msi_msg *msg, - u8 hpet_id); void (*teardown_msi_irq)(unsigned int irq); void (*teardown_msi_irqs)(struct pci_dev *dev); void (*restore_msi_irqs)(struct pci_dev *dev); - int (*setup_hpet_msi)(unsigned int irq, unsigned int id); }; -struct IO_APIC_route_entry; -struct io_apic_irq_attr; -struct irq_data; -struct cpumask; - struct x86_io_apic_ops { - void (*init) (void); unsigned int (*read) (unsigned int apic, unsigned int reg); - void (*write) (unsigned int apic, unsigned int reg, unsigned int value); - void (*modify) (unsigned int apic, unsigned int reg, unsigned int value); void (*disable)(void); - void (*print_entries)(unsigned int apic, unsigned int nr_entries); - int (*set_affinity)(struct irq_data *data, - const struct cpumask *mask, - bool force); - int (*setup_entry)(int irq, struct IO_APIC_route_entry *entry, - unsigned int destination, int vector, - struct io_apic_irq_attr *attr); - void (*eoi_ioapic_pin)(int apic, int pin, int vector); }; extern struct x86_init_ops x86_init; diff --git a/arch/x86/include/uapi/asm/msr.h b/arch/x86/include/uapi/asm/msr.h index 155e510..c41f4fe 100644 --- a/arch/x86/include/uapi/asm/msr.h +++ b/arch/x86/include/uapi/asm/msr.h @@ -1,8 +1,6 @@ #ifndef _UAPI_ASM_X86_MSR_H #define _UAPI_ASM_X86_MSR_H -#include <asm/msr-index.h> - #ifndef __ASSEMBLY__ #include <linux/types.h> diff --git a/arch/x86/include/uapi/asm/mtrr.h b/arch/x86/include/uapi/asm/mtrr.h index d0acb65..7528dcf 100644 --- a/arch/x86/include/uapi/asm/mtrr.h +++ b/arch/x86/include/uapi/asm/mtrr.h @@ -103,7 +103,7 @@ struct mtrr_state_type { #define MTRRIOC_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry) #define MTRRIOC_KILL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry) -/* These are the region types */ +/* MTRR memory types, which are defined in SDM */ #define MTRR_TYPE_UNCACHABLE 0 #define MTRR_TYPE_WRCOMB 1 /*#define MTRR_TYPE_ 2*/ @@ -113,5 +113,11 @@ struct mtrr_state_type { #define MTRR_TYPE_WRBACK 6 #define MTRR_NUM_TYPES 7 +/* + * Invalid MTRR memory type. mtrr_type_lookup() returns this value when + * MTRRs are disabled. Note, this value is allocated from the reserved + * values (0x7-0xff) of the MTRR memory types. + */ +#define MTRR_TYPE_INVALID 0xff #endif /* _UAPI_ASM_X86_MTRR_H */ diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile index febaf18..0f15af4 100644 --- a/arch/x86/kernel/Makefile +++ b/arch/x86/kernel/Makefile @@ -22,7 +22,7 @@ KASAN_SANITIZE_dumpstack_$(BITS).o := n CFLAGS_irq.o := -I$(src)/../include/asm/trace -obj-y := process_$(BITS).o signal.o entry_$(BITS).o +obj-y := process_$(BITS).o signal.o obj-y += traps.o irq.o irq_$(BITS).o dumpstack_$(BITS).o obj-y += time.o ioport.o ldt.o dumpstack.o nmi.o obj-y += setup.o x86_init.o i8259.o irqinit.o jump_label.o @@ -31,9 +31,6 @@ obj-y += probe_roms.o obj-$(CONFIG_X86_32) += i386_ksyms_32.o obj-$(CONFIG_X86_64) += sys_x86_64.o x8664_ksyms_64.o obj-$(CONFIG_X86_64) += mcount_64.o -obj-y += syscall_$(BITS).o vsyscall_gtod.o -obj-$(CONFIG_IA32_EMULATION) += syscall_32.o -obj-$(CONFIG_X86_VSYSCALL_EMULATION) += vsyscall_64.o vsyscall_emu_64.o obj-$(CONFIG_X86_ESPFIX64) += espfix_64.o obj-$(CONFIG_SYSFS) += ksysfs.o obj-y += bootflag.o e820.o diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c index dbe76a1..e49ee24 100644 --- a/arch/x86/kernel/acpi/boot.c +++ b/arch/x86/kernel/acpi/boot.c @@ -31,12 +31,12 @@ #include <linux/module.h> #include <linux/dmi.h> #include <linux/irq.h> -#include <linux/irqdomain.h> #include <linux/slab.h> #include <linux/bootmem.h> #include <linux/ioport.h> #include <linux/pci.h> +#include <asm/irqdomain.h> #include <asm/pci_x86.h> #include <asm/pgtable.h> #include <asm/io_apic.h> @@ -400,57 +400,13 @@ static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger, return 0; } -static int mp_register_gsi(struct device *dev, u32 gsi, int trigger, - int polarity) -{ - int irq, node; - - if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC) - return gsi; - - trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1; - polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1; - node = dev ? dev_to_node(dev) : NUMA_NO_NODE; - if (mp_set_gsi_attr(gsi, trigger, polarity, node)) { - pr_warn("Failed to set pin attr for GSI%d\n", gsi); - return -1; - } - - irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC); - if (irq < 0) - return irq; - - /* Don't set up the ACPI SCI because it's already set up */ - if (enable_update_mptable && acpi_gbl_FADT.sci_interrupt != gsi) - mp_config_acpi_gsi(dev, gsi, trigger, polarity); - - return irq; -} - -static void mp_unregister_gsi(u32 gsi) -{ - int irq; - - if (acpi_irq_model != ACPI_IRQ_MODEL_IOAPIC) - return; - - irq = mp_map_gsi_to_irq(gsi, 0); - if (irq > 0) - mp_unmap_irq(irq); -} - -static struct irq_domain_ops acpi_irqdomain_ops = { - .map = mp_irqdomain_map, - .unmap = mp_irqdomain_unmap, -}; - static int __init acpi_parse_ioapic(struct acpi_subtable_header * header, const unsigned long end) { struct acpi_madt_io_apic *ioapic = NULL; struct ioapic_domain_cfg cfg = { .type = IOAPIC_DOMAIN_DYNAMIC, - .ops = &acpi_irqdomain_ops, + .ops = &mp_ioapic_irqdomain_ops, }; ioapic = (struct acpi_madt_io_apic *)header; @@ -652,7 +608,7 @@ static int acpi_register_gsi_pic(struct device *dev, u32 gsi, * Make sure all (legacy) PCI IRQs are set as level-triggered. */ if (trigger == ACPI_LEVEL_SENSITIVE) - eisa_set_level_irq(gsi); + elcr_set_level_irq(gsi); #endif return gsi; @@ -663,10 +619,21 @@ static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, int trigger, int polarity) { int irq = gsi; - #ifdef CONFIG_X86_IO_APIC + int node; + struct irq_alloc_info info; + + node = dev ? dev_to_node(dev) : NUMA_NO_NODE; + trigger = trigger == ACPI_EDGE_SENSITIVE ? 0 : 1; + polarity = polarity == ACPI_ACTIVE_HIGH ? 0 : 1; + ioapic_set_alloc_attr(&info, node, trigger, polarity); + mutex_lock(&acpi_ioapic_lock); - irq = mp_register_gsi(dev, gsi, trigger, polarity); + irq = mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info); + /* Don't set up the ACPI SCI because it's already set up */ + if (irq >= 0 && enable_update_mptable && + acpi_gbl_FADT.sci_interrupt != gsi) + mp_config_acpi_gsi(dev, gsi, trigger, polarity); mutex_unlock(&acpi_ioapic_lock); #endif @@ -676,8 +643,12 @@ static int acpi_register_gsi_ioapic(struct device *dev, u32 gsi, static void acpi_unregister_gsi_ioapic(u32 gsi) { #ifdef CONFIG_X86_IO_APIC + int irq; + mutex_lock(&acpi_ioapic_lock); - mp_unregister_gsi(gsi); + irq = mp_map_gsi_to_irq(gsi, 0, NULL); + if (irq > 0) + mp_unmap_irq(irq); mutex_unlock(&acpi_ioapic_lock); #endif } @@ -786,7 +757,7 @@ int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base) u64 addr; struct ioapic_domain_cfg cfg = { .type = IOAPIC_DOMAIN_DYNAMIC, - .ops = &acpi_irqdomain_ops, + .ops = &mp_ioapic_irqdomain_ops, }; ioapic_id = acpi_get_ioapic_id(handle, gsi_base, &addr); diff --git a/arch/x86/kernel/acpi/wakeup_64.S b/arch/x86/kernel/acpi/wakeup_64.S index ae693b5..8c35df4 100644 --- a/arch/x86/kernel/acpi/wakeup_64.S +++ b/arch/x86/kernel/acpi/wakeup_64.S @@ -62,7 +62,7 @@ ENTRY(do_suspend_lowlevel) pushfq popq pt_regs_flags(%rax) - movq $resume_point, saved_rip(%rip) + movq $.Lresume_point, saved_rip(%rip) movq %rsp, saved_rsp movq %rbp, saved_rbp @@ -75,10 +75,10 @@ ENTRY(do_suspend_lowlevel) xorl %eax, %eax call x86_acpi_enter_sleep_state /* in case something went wrong, restore the machine status and go on */ - jmp resume_point + jmp .Lresume_point .align 4 -resume_point: +.Lresume_point: /* We don't restore %rax, it must be 0 anyway */ movq $saved_context, %rax movq saved_context_cr4(%rax), %rbx diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c index 7fe0972..c42827e 100644 --- a/arch/x86/kernel/alternative.c +++ b/arch/x86/kernel/alternative.c @@ -231,6 +231,15 @@ void __init arch_init_ideal_nops(void) #endif } break; + + case X86_VENDOR_AMD: + if (boot_cpu_data.x86 > 0xf) { + ideal_nops = p6_nops; + return; + } + + /* fall through */ + default: #ifdef CONFIG_X86_64 ideal_nops = k8_nops; diff --git a/arch/x86/kernel/apb_timer.c b/arch/x86/kernel/apb_timer.c index 6a7c23f..ede92c3 100644 --- a/arch/x86/kernel/apb_timer.c +++ b/arch/x86/kernel/apb_timer.c @@ -171,10 +171,6 @@ static int __init apbt_clockevent_register(void) static void apbt_setup_irq(struct apbt_dev *adev) { - /* timer0 irq has been setup early */ - if (adev->irq == 0) - return; - irq_modify_status(adev->irq, 0, IRQ_MOVE_PCNTXT); irq_set_affinity(adev->irq, cpumask_of(adev->cpu)); } diff --git a/arch/x86/kernel/apic/htirq.c b/arch/x86/kernel/apic/htirq.c index 816f36e..ae50d34 100644 --- a/arch/x86/kernel/apic/htirq.c +++ b/arch/x86/kernel/apic/htirq.c @@ -3,6 +3,8 @@ * * Copyright (C) 1997, 1998, 1999, 2000, 2009 Ingo Molnar, Hajnalka Szabo * Moved from arch/x86/kernel/apic/io_apic.c. + * Jiang Liu <jiang.liu@linux.intel.com> + * Add support of hierarchical irqdomain * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as @@ -14,78 +16,112 @@ #include <linux/device.h> #include <linux/pci.h> #include <linux/htirq.h> +#include <asm/irqdomain.h> #include <asm/hw_irq.h> #include <asm/apic.h> #include <asm/hypertransport.h> +static struct irq_domain *htirq_domain; + /* * Hypertransport interrupt support */ -static void target_ht_irq(unsigned int irq, unsigned int dest, u8 vector) -{ - struct ht_irq_msg msg; - - fetch_ht_irq_msg(irq, &msg); - - msg.address_lo &= ~(HT_IRQ_LOW_VECTOR_MASK | HT_IRQ_LOW_DEST_ID_MASK); - msg.address_hi &= ~(HT_IRQ_HIGH_DEST_ID_MASK); - - msg.address_lo |= HT_IRQ_LOW_VECTOR(vector) | HT_IRQ_LOW_DEST_ID(dest); - msg.address_hi |= HT_IRQ_HIGH_DEST_ID(dest); - - write_ht_irq_msg(irq, &msg); -} - static int ht_set_affinity(struct irq_data *data, const struct cpumask *mask, bool force) { - struct irq_cfg *cfg = irqd_cfg(data); - unsigned int dest; + struct irq_data *parent = data->parent_data; int ret; - ret = apic_set_affinity(data, mask, &dest); - if (ret) - return ret; - - target_ht_irq(data->irq, dest, cfg->vector); - return IRQ_SET_MASK_OK_NOCOPY; + ret = parent->chip->irq_set_affinity(parent, mask, force); + if (ret >= 0) { + struct ht_irq_msg msg; + struct irq_cfg *cfg = irqd_cfg(data); + + fetch_ht_irq_msg(data->irq, &msg); + msg.address_lo &= ~(HT_IRQ_LOW_VECTOR_MASK | + HT_IRQ_LOW_DEST_ID_MASK); + msg.address_lo |= HT_IRQ_LOW_VECTOR(cfg->vector) | + HT_IRQ_LOW_DEST_ID(cfg->dest_apicid); + msg.address_hi &= ~(HT_IRQ_HIGH_DEST_ID_MASK); + msg.address_hi |= HT_IRQ_HIGH_DEST_ID(cfg->dest_apicid); + write_ht_irq_msg(data->irq, &msg); + } + + return ret; } static struct irq_chip ht_irq_chip = { .name = "PCI-HT", .irq_mask = mask_ht_irq, .irq_unmask = unmask_ht_irq, - .irq_ack = apic_ack_edge, + .irq_ack = irq_chip_ack_parent, .irq_set_affinity = ht_set_affinity, - .irq_retrigger = apic_retrigger_irq, + .irq_retrigger = irq_chip_retrigger_hierarchy, .flags = IRQCHIP_SKIP_SET_WAKE, }; -int arch_setup_ht_irq(unsigned int irq, struct pci_dev *dev) +static int htirq_domain_alloc(struct irq_domain *domain, unsigned int virq, + unsigned int nr_irqs, void *arg) { - struct irq_cfg *cfg; - struct ht_irq_msg msg; - unsigned dest; - int err; + struct ht_irq_cfg *ht_cfg; + struct irq_alloc_info *info = arg; + struct pci_dev *dev; + irq_hw_number_t hwirq; + int ret; - if (disable_apic) - return -ENXIO; + if (nr_irqs > 1 || !info) + return -EINVAL; - cfg = irq_cfg(irq); - err = assign_irq_vector(irq, cfg, apic->target_cpus()); - if (err) - return err; + dev = info->ht_dev; + hwirq = (info->ht_idx & 0xFF) | + PCI_DEVID(dev->bus->number, dev->devfn) << 8 | + (pci_domain_nr(dev->bus) & 0xFFFFFFFF) << 24; + if (irq_find_mapping(domain, hwirq) > 0) + return -EEXIST; - err = apic->cpu_mask_to_apicid_and(cfg->domain, - apic->target_cpus(), &dest); - if (err) - return err; + ht_cfg = kmalloc(sizeof(*ht_cfg), GFP_KERNEL); + if (!ht_cfg) + return -ENOMEM; - msg.address_hi = HT_IRQ_HIGH_DEST_ID(dest); + ret = irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, info); + if (ret < 0) { + kfree(ht_cfg); + return ret; + } + + /* Initialize msg to a value that will never match the first write. */ + ht_cfg->msg.address_lo = 0xffffffff; + ht_cfg->msg.address_hi = 0xffffffff; + ht_cfg->dev = info->ht_dev; + ht_cfg->update = info->ht_update; + ht_cfg->pos = info->ht_pos; + ht_cfg->idx = 0x10 + (info->ht_idx * 2); + irq_domain_set_info(domain, virq, hwirq, &ht_irq_chip, ht_cfg, + handle_edge_irq, ht_cfg, "edge"); + + return 0; +} + +static void htirq_domain_free(struct irq_domain *domain, unsigned int virq, + unsigned int nr_irqs) +{ + struct irq_data *irq_data = irq_domain_get_irq_data(domain, virq); + + BUG_ON(nr_irqs != 1); + kfree(irq_data->chip_data); + irq_domain_free_irqs_top(domain, virq, nr_irqs); +} +static void htirq_domain_activate(struct irq_domain *domain, + struct irq_data *irq_data) +{ + struct ht_irq_msg msg; + struct irq_cfg *cfg = irqd_cfg(irq_data); + + msg.address_hi = HT_IRQ_HIGH_DEST_ID(cfg->dest_apicid); msg.address_lo = HT_IRQ_LOW_BASE | - HT_IRQ_LOW_DEST_ID(dest) | + HT_IRQ_LOW_DEST_ID(cfg->dest_apicid) | HT_IRQ_LOW_VECTOR(cfg->vector) | ((apic->irq_dest_mode == 0) ? HT_IRQ_LOW_DM_PHYSICAL : @@ -95,13 +131,56 @@ int arch_setup_ht_irq(unsigned int irq, struct pci_dev *dev) HT_IRQ_LOW_MT_FIXED : HT_IRQ_LOW_MT_ARBITRATED) | HT_IRQ_LOW_IRQ_MASKED; + write_ht_irq_msg(irq_data->irq, &msg); +} - write_ht_irq_msg(irq, &msg); +static void htirq_domain_deactivate(struct irq_domain *domain, + struct irq_data *irq_data) +{ + struct ht_irq_msg msg; - irq_set_chip_and_handler_name(irq, &ht_irq_chip, - handle_edge_irq, "edge"); + memset(&msg, 0, sizeof(msg)); + write_ht_irq_msg(irq_data->irq, &msg); +} - dev_dbg(&dev->dev, "irq %d for HT\n", irq); +static const struct irq_domain_ops htirq_domain_ops = { + .alloc = htirq_domain_alloc, + .free = htirq_domain_free, + .activate = htirq_domain_activate, + .deactivate = htirq_domain_deactivate, +}; - return 0; +void arch_init_htirq_domain(struct irq_domain *parent) +{ + if (disable_apic) + return; + + htirq_domain = irq_domain_add_tree(NULL, &htirq_domain_ops, NULL); + if (!htirq_domain) + pr_warn("failed to initialize irqdomain for HTIRQ.\n"); + else + htirq_domain->parent = parent; +} + +int arch_setup_ht_irq(int idx, int pos, struct pci_dev *dev, + ht_irq_update_t *update) +{ + struct irq_alloc_info info; + + if (!htirq_domain) + return -ENOSYS; + + init_irq_alloc_info(&info, NULL); + info.ht_idx = idx; + info.ht_pos = pos; + info.ht_dev = dev; + info.ht_update = update; + + return irq_domain_alloc_irqs(htirq_domain, 1, dev_to_node(&dev->dev), + &info); +} + +void arch_teardown_ht_irq(unsigned int irq) +{ + irq_domain_free_irqs(irq, 1); } diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index f4dc246..845dc0d 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -18,6 +18,16 @@ * and Rolf G. Tews * for testing these extensively * Paul Diefenbaugh : Added full ACPI support + * + * Historical information which is worth to be preserved: + * + * - SiS APIC rmw bug: + * + * We used to have a workaround for a bug in SiS chips which + * required to rewrite the index register for a read-modify-write + * operation as the chip lost the index information which was + * setup for the read already. We cache the data now, so that + * workaround has been removed. */ #include <linux/mm.h> @@ -31,13 +41,13 @@ #include <linux/acpi.h> #include <linux/module.h> #include <linux/syscore_ops.h> -#include <linux/irqdomain.h> #include <linux/freezer.h> #include <linux/kthread.h> #include <linux/jiffies.h> /* time_after() */ #include <linux/slab.h> #include <linux/bootmem.h> +#include <asm/irqdomain.h> #include <asm/idle.h> #include <asm/io.h> #include <asm/smp.h> @@ -63,27 +73,31 @@ #define for_each_ioapic_pin(idx, pin) \ for_each_ioapic((idx)) \ for_each_pin((idx), (pin)) - #define for_each_irq_pin(entry, head) \ list_for_each_entry(entry, &head, list) -/* - * Is the SiS APIC rmw bug present ? - * -1 = don't know, 0 = no, 1 = yes - */ -int sis_apic_bug = -1; - static DEFINE_RAW_SPINLOCK(ioapic_lock); static DEFINE_MUTEX(ioapic_mutex); static unsigned int ioapic_dynirq_base; static int ioapic_initialized; -struct mp_pin_info { +struct irq_pin_list { + struct list_head list; + int apic, pin; +}; + +struct mp_chip_data { + struct list_head irq_2_pin; + struct IO_APIC_route_entry entry; int trigger; int polarity; - int node; - int set; u32 count; + bool isa_irq; +}; + +struct mp_ioapic_gsi { + u32 gsi_base; + u32 gsi_end; }; static struct ioapic { @@ -101,7 +115,6 @@ static struct ioapic { struct mp_ioapic_gsi gsi_config; struct ioapic_domain_cfg irqdomain_cfg; struct irq_domain *irqdomain; - struct mp_pin_info *pin_info; struct resource *iomem_res; } ioapics[MAX_IO_APICS]; @@ -117,7 +130,7 @@ unsigned int mpc_ioapic_addr(int ioapic_idx) return ioapics[ioapic_idx].mp_config.apicaddr; } -struct mp_ioapic_gsi *mp_ioapic_gsi_routing(int ioapic_idx) +static inline struct mp_ioapic_gsi *mp_ioapic_gsi_routing(int ioapic_idx) { return &ioapics[ioapic_idx].gsi_config; } @@ -129,11 +142,16 @@ static inline int mp_ioapic_pin_count(int ioapic) return gsi_cfg->gsi_end - gsi_cfg->gsi_base + 1; } -u32 mp_pin_to_gsi(int ioapic, int pin) +static inline u32 mp_pin_to_gsi(int ioapic, int pin) { return mp_ioapic_gsi_routing(ioapic)->gsi_base + pin; } +static inline bool mp_is_legacy_irq(int irq) +{ + return irq >= 0 && irq < nr_legacy_irqs(); +} + /* * Initialize all legacy IRQs and all pins on the first IOAPIC * if we have legacy interrupt controller. Kernel boot option "pirq=" @@ -144,12 +162,7 @@ static inline int mp_init_irq_at_boot(int ioapic, int irq) if (!nr_legacy_irqs()) return 0; - return ioapic == 0 || (irq >= 0 && irq < nr_legacy_irqs()); -} - -static inline struct mp_pin_info *mp_pin_info(int ioapic_idx, int pin) -{ - return ioapics[ioapic_idx].pin_info + pin; + return ioapic == 0 || mp_is_legacy_irq(irq); } static inline struct irq_domain *mp_ioapic_irqdomain(int ioapic) @@ -216,16 +229,6 @@ void mp_save_irq(struct mpc_intsrc *m) panic("Max # of irq sources exceeded!!\n"); } -struct irq_pin_list { - struct list_head list; - int apic, pin; -}; - -static struct irq_pin_list *alloc_irq_pin_list(int node) -{ - return kzalloc_node(sizeof(struct irq_pin_list), GFP_KERNEL, node); -} - static void alloc_ioapic_saved_registers(int idx) { size_t size; @@ -247,8 +250,7 @@ static void free_ioapic_saved_registers(int idx) int __init arch_early_ioapic_init(void) { - struct irq_cfg *cfg; - int i, node = cpu_to_node(0); + int i; if (!nr_legacy_irqs()) io_apic_irqs = ~0UL; @@ -256,16 +258,6 @@ int __init arch_early_ioapic_init(void) for_each_ioapic(i) alloc_ioapic_saved_registers(i); - /* - * For legacy IRQ's, start with assigning irq0 to irq15 to - * IRQ0_VECTOR to IRQ15_VECTOR for all cpu's. - */ - for (i = 0; i < nr_legacy_irqs(); i++) { - cfg = alloc_irq_and_cfg_at(i, node); - cfg->vector = IRQ0_VECTOR + i; - cpumask_setall(cfg->domain); - } - return 0; } @@ -283,7 +275,7 @@ static __attribute_const__ struct io_apic __iomem *io_apic_base(int idx) + (mpc_ioapic_addr(idx) & ~PAGE_MASK); } -void io_apic_eoi(unsigned int apic, unsigned int vector) +static inline void io_apic_eoi(unsigned int apic, unsigned int vector) { struct io_apic __iomem *io_apic = io_apic_base(apic); writel(vector, &io_apic->eoi); @@ -296,7 +288,8 @@ unsigned int native_io_apic_read(unsigned int apic, unsigned int reg) return readl(&io_apic->data); } -void native_io_apic_write(unsigned int apic, unsigned int reg, unsigned int value) +static void io_apic_write(unsigned int apic, unsigned int reg, + unsigned int value) { struct io_apic __iomem *io_apic = io_apic_base(apic); @@ -304,21 +297,6 @@ void native_io_apic_write(unsigned int apic, unsigned int reg, unsigned int valu writel(value, &io_apic->data); } -/* - * Re-write a value: to be used for read-modify-write - * cycles where the read already set up the index register. - * - * Older SiS APIC requires we rewrite the index register - */ -void native_io_apic_modify(unsigned int apic, unsigned int reg, unsigned int value) -{ - struct io_apic __iomem *io_apic = io_apic_base(apic); - - if (sis_apic_bug) - writel(reg, &io_apic->index); - writel(value, &io_apic->data); -} - union entry_union { struct { u32 w1, w2; }; struct IO_APIC_route_entry entry; @@ -378,7 +356,7 @@ static void ioapic_write_entry(int apic, int pin, struct IO_APIC_route_entry e) static void ioapic_mask_entry(int apic, int pin) { unsigned long flags; - union entry_union eu = { .entry.mask = 1 }; + union entry_union eu = { .entry.mask = IOAPIC_MASKED }; raw_spin_lock_irqsave(&ioapic_lock, flags); io_apic_write(apic, 0x10 + 2*pin, eu.w1); @@ -391,16 +369,17 @@ static void ioapic_mask_entry(int apic, int pin) * shared ISA-space IRQs, so we have to support them. We are super * fast in the common case, and fast for shared ISA-space IRQs. */ -static int __add_pin_to_irq_node(struct irq_cfg *cfg, int node, int apic, int pin) +static int __add_pin_to_irq_node(struct mp_chip_data *data, + int node, int apic, int pin) { struct irq_pin_list *entry; /* don't allow duplicates */ - for_each_irq_pin(entry, cfg->irq_2_pin) + for_each_irq_pin(entry, data->irq_2_pin) if (entry->apic == apic && entry->pin == pin) return 0; - entry = alloc_irq_pin_list(node); + entry = kzalloc_node(sizeof(struct irq_pin_list), GFP_ATOMIC, node); if (!entry) { pr_err("can not alloc irq_pin_list (%d,%d,%d)\n", node, apic, pin); @@ -408,16 +387,16 @@ static int __add_pin_to_irq_node(struct irq_cfg *cfg, int node, int apic, int pi } entry->apic = apic; entry->pin = pin; + list_add_tail(&entry->list, &data->irq_2_pin); - list_add_tail(&entry->list, &cfg->irq_2_pin); return 0; } -static void __remove_pin_from_irq(struct irq_cfg *cfg, int apic, int pin) +static void __remove_pin_from_irq(struct mp_chip_data *data, int apic, int pin) { struct irq_pin_list *tmp, *entry; - list_for_each_entry_safe(entry, tmp, &cfg->irq_2_pin, list) + list_for_each_entry_safe(entry, tmp, &data->irq_2_pin, list) if (entry->apic == apic && entry->pin == pin) { list_del(&entry->list); kfree(entry); @@ -425,22 +404,23 @@ static void __remove_pin_from_irq(struct irq_cfg *cfg, int apic, int pin) } } -static void add_pin_to_irq_node(struct irq_cfg *cfg, int node, int apic, int pin) +static void add_pin_to_irq_node(struct mp_chip_data *data, + int node, int apic, int pin) { - if (__add_pin_to_irq_node(cfg, node, apic, pin)) + if (__add_pin_to_irq_node(data, node, apic, pin)) panic("IO-APIC: failed to add irq-pin. Can not proceed\n"); } /* * Reroute an IRQ to a different pin. */ -static void __init replace_pin_at_irq_node(struct irq_cfg *cfg, int node, +static void __init replace_pin_at_irq_node(struct mp_chip_data *data, int node, int oldapic, int oldpin, int newapic, int newpin) { struct irq_pin_list *entry; - for_each_irq_pin(entry, cfg->irq_2_pin) { + for_each_irq_pin(entry, data->irq_2_pin) { if (entry->apic == oldapic && entry->pin == oldpin) { entry->apic = newapic; entry->pin = newpin; @@ -450,32 +430,26 @@ static void __init replace_pin_at_irq_node(struct irq_cfg *cfg, int node, } /* old apic/pin didn't exist, so just add new ones */ - add_pin_to_irq_node(cfg, node, newapic, newpin); -} - -static void __io_apic_modify_irq(struct irq_pin_list *entry, - int mask_and, int mask_or, - void (*final)(struct irq_pin_list *entry)) -{ - unsigned int reg, pin; - - pin = entry->pin; - reg = io_apic_read(entry->apic, 0x10 + pin * 2); - reg &= mask_and; - reg |= mask_or; - io_apic_modify(entry->apic, 0x10 + pin * 2, reg); - if (final) - final(entry); + add_pin_to_irq_node(data, node, newapic, newpin); } -static void io_apic_modify_irq(struct irq_cfg *cfg, +static void io_apic_modify_irq(struct mp_chip_data *data, int mask_and, int mask_or, void (*final)(struct irq_pin_list *entry)) { + union entry_union eu; struct irq_pin_list *entry; - for_each_irq_pin(entry, cfg->irq_2_pin) - __io_apic_modify_irq(entry, mask_and, mask_or, final); + eu.entry = data->entry; + eu.w1 &= mask_and; + eu.w1 |= mask_or; + data->entry = eu.entry; + + for_each_irq_pin(entry, data->irq_2_pin) { + io_apic_write(entry->apic, 0x10 + 2 * entry->pin, eu.w1); + if (final) + final(entry); + } } static void io_apic_sync(struct irq_pin_list *entry) @@ -490,39 +464,31 @@ static void io_apic_sync(struct irq_pin_list *entry) readl(&io_apic->data); } -static void mask_ioapic(struct irq_cfg *cfg) +static void mask_ioapic_irq(struct irq_data *irq_data) { + struct mp_chip_data *data = irq_data->chip_data; unsigned long flags; raw_spin_lock_irqsave(&ioapic_lock, flags); - io_apic_modify_irq(cfg, ~0, IO_APIC_REDIR_MASKED, &io_apic_sync); + io_apic_modify_irq(data, ~0, IO_APIC_REDIR_MASKED, &io_apic_sync); raw_spin_unlock_irqrestore(&ioapic_lock, flags); } -static void mask_ioapic_irq(struct irq_data *data) +static void __unmask_ioapic(struct mp_chip_data *data) { - mask_ioapic(irqd_cfg(data)); + io_apic_modify_irq(data, ~IO_APIC_REDIR_MASKED, 0, NULL); } -static void __unmask_ioapic(struct irq_cfg *cfg) -{ - io_apic_modify_irq(cfg, ~IO_APIC_REDIR_MASKED, 0, NULL); -} - -static void unmask_ioapic(struct irq_cfg *cfg) +static void unmask_ioapic_irq(struct irq_data *irq_data) { + struct mp_chip_data *data = irq_data->chip_data; unsigned long flags; raw_spin_lock_irqsave(&ioapic_lock, flags); - __unmask_ioapic(cfg); + __unmask_ioapic(data); raw_spin_unlock_irqrestore(&ioapic_lock, flags); } -static void unmask_ioapic_irq(struct irq_data *data) -{ - unmask_ioapic(irqd_cfg(data)); -} - /* * IO-APIC versions below 0x20 don't support EOI register. * For the record, here is the information about various versions: @@ -539,7 +505,7 @@ static void unmask_ioapic_irq(struct irq_data *data) * Otherwise, we simulate the EOI message manually by changing the trigger * mode to edge and then back to level, with RTE being masked during this. */ -void native_eoi_ioapic_pin(int apic, int pin, int vector) +static void __eoi_ioapic_pin(int apic, int pin, int vector) { if (mpc_ioapic_ver(apic) >= 0x20) { io_apic_eoi(apic, vector); @@ -551,7 +517,7 @@ void native_eoi_ioapic_pin(int apic, int pin, int vector) /* * Mask the entry and change the trigger mode to edge. */ - entry1.mask = 1; + entry1.mask = IOAPIC_MASKED; entry1.trigger = IOAPIC_EDGE; __ioapic_write_entry(apic, pin, entry1); @@ -563,15 +529,14 @@ void native_eoi_ioapic_pin(int apic, int pin, int vector) } } -void eoi_ioapic_irq(unsigned int irq, struct irq_cfg *cfg) +void eoi_ioapic_pin(int vector, struct mp_chip_data *data) { - struct irq_pin_list *entry; unsigned long flags; + struct irq_pin_list *entry; raw_spin_lock_irqsave(&ioapic_lock, flags); - for_each_irq_pin(entry, cfg->irq_2_pin) - x86_io_apic_ops.eoi_ioapic_pin(entry->apic, entry->pin, - cfg->vector); + for_each_irq_pin(entry, data->irq_2_pin) + __eoi_ioapic_pin(entry->apic, entry->pin, vector); raw_spin_unlock_irqrestore(&ioapic_lock, flags); } @@ -588,8 +553,8 @@ static void clear_IO_APIC_pin(unsigned int apic, unsigned int pin) * Make sure the entry is masked and re-read the contents to check * if it is a level triggered pin and if the remote-IRR is set. */ - if (!entry.mask) { - entry.mask = 1; + if (entry.mask == IOAPIC_UNMASKED) { + entry.mask = IOAPIC_MASKED; ioapic_write_entry(apic, pin, entry); entry = ioapic_read_entry(apic, pin); } @@ -602,13 +567,12 @@ static void clear_IO_APIC_pin(unsigned int apic, unsigned int pin) * doesn't clear the remote-IRR if the trigger mode is not * set to level. */ - if (!entry.trigger) { + if (entry.trigger == IOAPIC_EDGE) { entry.trigger = IOAPIC_LEVEL; ioapic_write_entry(apic, pin, entry); } - raw_spin_lock_irqsave(&ioapic_lock, flags); - x86_io_apic_ops.eoi_ioapic_pin(apic, pin, entry.vector); + __eoi_ioapic_pin(apic, pin, entry.vector); raw_spin_unlock_irqrestore(&ioapic_lock, flags); } @@ -706,8 +670,8 @@ void mask_ioapic_entries(void) struct IO_APIC_route_entry entry; entry = ioapics[apic].saved_registers[pin]; - if (!entry.mask) { - entry.mask = 1; + if (entry.mask == IOAPIC_UNMASKED) { + entry.mask = IOAPIC_MASKED; ioapic_write_entry(apic, pin, entry); } } @@ -809,11 +773,11 @@ static int EISA_ELCR(unsigned int irq) #endif -/* ISA interrupts are always polarity zero edge triggered, +/* ISA interrupts are always active high edge triggered, * when listed as conforming in the MP table. */ -#define default_ISA_trigger(idx) (0) -#define default_ISA_polarity(idx) (0) +#define default_ISA_trigger(idx) (IOAPIC_EDGE) +#define default_ISA_polarity(idx) (IOAPIC_POL_HIGH) /* EISA interrupts are always polarity zero and can be edge or level * trigger depending on the ELCR value. If an interrupt is listed as @@ -823,53 +787,55 @@ static int EISA_ELCR(unsigned int irq) #define default_EISA_trigger(idx) (EISA_ELCR(mp_irqs[idx].srcbusirq)) #define default_EISA_polarity(idx) default_ISA_polarity(idx) -/* PCI interrupts are always polarity one level triggered, +/* PCI interrupts are always active low level triggered, * when listed as conforming in the MP table. */ -#define default_PCI_trigger(idx) (1) -#define default_PCI_polarity(idx) (1) +#define default_PCI_trigger(idx) (IOAPIC_LEVEL) +#define default_PCI_polarity(idx) (IOAPIC_POL_LOW) static int irq_polarity(int idx) { int bus = mp_irqs[idx].srcbus; - int polarity; /* * Determine IRQ line polarity (high active or low active): */ - switch (mp_irqs[idx].irqflag & 3) - { - case 0: /* conforms, ie. bus-type dependent polarity */ - if (test_bit(bus, mp_bus_not_pci)) - polarity = default_ISA_polarity(idx); - else - polarity = default_PCI_polarity(idx); - break; - case 1: /* high active */ - { - polarity = 0; - break; - } - case 2: /* reserved */ - { - pr_warn("broken BIOS!!\n"); - polarity = 1; - break; - } - case 3: /* low active */ - { - polarity = 1; - break; - } - default: /* invalid */ - { - pr_warn("broken BIOS!!\n"); - polarity = 1; - break; - } + switch (mp_irqs[idx].irqflag & 0x03) { + case 0: + /* conforms to spec, ie. bus-type dependent polarity */ + if (test_bit(bus, mp_bus_not_pci)) + return default_ISA_polarity(idx); + else + return default_PCI_polarity(idx); + case 1: + return IOAPIC_POL_HIGH; + case 2: + pr_warn("IOAPIC: Invalid polarity: 2, defaulting to low\n"); + case 3: + default: /* Pointless default required due to do gcc stupidity */ + return IOAPIC_POL_LOW; + } +} + +#ifdef CONFIG_EISA +static int eisa_irq_trigger(int idx, int bus, int trigger) +{ + switch (mp_bus_id_to_type[bus]) { + case MP_BUS_PCI: + case MP_BUS_ISA: + return trigger; + case MP_BUS_EISA: + return default_EISA_trigger(idx); } - return polarity; + pr_warn("IOAPIC: Invalid srcbus: %d defaulting to level\n", bus); + return IOAPIC_LEVEL; } +#else +static inline int eisa_irq_trigger(int idx, int bus, int trigger) +{ + return trigger; +} +#endif static int irq_trigger(int idx) { @@ -879,153 +845,227 @@ static int irq_trigger(int idx) /* * Determine IRQ trigger mode (edge or level sensitive): */ - switch ((mp_irqs[idx].irqflag>>2) & 3) - { - case 0: /* conforms, ie. bus-type dependent */ - if (test_bit(bus, mp_bus_not_pci)) - trigger = default_ISA_trigger(idx); - else - trigger = default_PCI_trigger(idx); -#ifdef CONFIG_EISA - switch (mp_bus_id_to_type[bus]) { - case MP_BUS_ISA: /* ISA pin */ - { - /* set before the switch */ - break; - } - case MP_BUS_EISA: /* EISA pin */ - { - trigger = default_EISA_trigger(idx); - break; - } - case MP_BUS_PCI: /* PCI pin */ - { - /* set before the switch */ - break; - } - default: - { - pr_warn("broken BIOS!!\n"); - trigger = 1; - break; - } - } + switch ((mp_irqs[idx].irqflag >> 2) & 0x03) { + case 0: + /* conforms to spec, ie. bus-type dependent trigger mode */ + if (test_bit(bus, mp_bus_not_pci)) + trigger = default_ISA_trigger(idx); + else + trigger = default_PCI_trigger(idx); + /* Take EISA into account */ + return eisa_irq_trigger(idx, bus, trigger); + case 1: + return IOAPIC_EDGE; + case 2: + pr_warn("IOAPIC: Invalid trigger mode 2 defaulting to level\n"); + case 3: + default: /* Pointless default required due to do gcc stupidity */ + return IOAPIC_LEVEL; + } +} + +void ioapic_set_alloc_attr(struct irq_alloc_info *info, int node, + int trigger, int polarity) +{ + init_irq_alloc_info(info, NULL); + info->type = X86_IRQ_ALLOC_TYPE_IOAPIC; + info->ioapic_node = node; + info->ioapic_trigger = trigger; + info->ioapic_polarity = polarity; + info->ioapic_valid = 1; +} + +#ifndef CONFIG_ACPI +int acpi_get_override_irq(u32 gsi, int *trigger, int *polarity); #endif - break; - case 1: /* edge */ - { - trigger = 0; - break; - } - case 2: /* reserved */ - { - pr_warn("broken BIOS!!\n"); - trigger = 1; - break; - } - case 3: /* level */ - { - trigger = 1; - break; - } - default: /* invalid */ - { - pr_warn("broken BIOS!!\n"); - trigger = 0; - break; + +static void ioapic_copy_alloc_attr(struct irq_alloc_info *dst, + struct irq_alloc_info *src, + u32 gsi, int ioapic_idx, int pin) +{ + int trigger, polarity; + + copy_irq_alloc_info(dst, src); + dst->type = X86_IRQ_ALLOC_TYPE_IOAPIC; + dst->ioapic_id = mpc_ioapic_id(ioapic_idx); + dst->ioapic_pin = pin; + dst->ioapic_valid = 1; + if (src && src->ioapic_valid) { + dst->ioapic_node = src->ioapic_node; + dst->ioapic_trigger = src->ioapic_trigger; + dst->ioapic_polarity = src->ioapic_polarity; + } else { + dst->ioapic_node = NUMA_NO_NODE; + if (acpi_get_override_irq(gsi, &trigger, &polarity) >= 0) { + dst->ioapic_trigger = trigger; + dst->ioapic_polarity = polarity; + } else { + /* + * PCI interrupts are always active low level + * triggered. + */ + dst->ioapic_trigger = IOAPIC_LEVEL; + dst->ioapic_polarity = IOAPIC_POL_LOW; } } - return trigger; } -static int alloc_irq_from_domain(struct irq_domain *domain, u32 gsi, int pin) +static int ioapic_alloc_attr_node(struct irq_alloc_info *info) +{ + return (info && info->ioapic_valid) ? info->ioapic_node : NUMA_NO_NODE; +} + +static void mp_register_handler(unsigned int irq, unsigned long trigger) +{ + irq_flow_handler_t hdl; + bool fasteoi; + + if (trigger) { + irq_set_status_flags(irq, IRQ_LEVEL); + fasteoi = true; + } else { + irq_clear_status_flags(irq, IRQ_LEVEL); + fasteoi = false; + } + + hdl = fasteoi ? handle_fasteoi_irq : handle_edge_irq; + __irq_set_handler(irq, hdl, 0, fasteoi ? "fasteoi" : "edge"); +} + +static bool mp_check_pin_attr(int irq, struct irq_alloc_info *info) { + struct mp_chip_data *data = irq_get_chip_data(irq); + + /* + * setup_IO_APIC_irqs() programs all legacy IRQs with default trigger + * and polarity attirbutes. So allow the first user to reprogram the + * pin with real trigger and polarity attributes. + */ + if (irq < nr_legacy_irqs() && data->count == 1) { + if (info->ioapic_trigger != data->trigger) + mp_register_handler(irq, data->trigger); + data->entry.trigger = data->trigger = info->ioapic_trigger; + data->entry.polarity = data->polarity = info->ioapic_polarity; + } + + return data->trigger == info->ioapic_trigger && + data->polarity == info->ioapic_polarity; +} + +static int alloc_irq_from_domain(struct irq_domain *domain, int ioapic, u32 gsi, + struct irq_alloc_info *info) +{ + bool legacy = false; int irq = -1; - int ioapic = (int)(long)domain->host_data; int type = ioapics[ioapic].irqdomain_cfg.type; switch (type) { case IOAPIC_DOMAIN_LEGACY: /* - * Dynamically allocate IRQ number for non-ISA IRQs in the first 16 - * GSIs on some weird platforms. + * Dynamically allocate IRQ number for non-ISA IRQs in the first + * 16 GSIs on some weird platforms. */ - if (gsi < nr_legacy_irqs()) - irq = irq_create_mapping(domain, pin); - else if (irq_create_strict_mappings(domain, gsi, pin, 1) == 0) + if (!ioapic_initialized || gsi >= nr_legacy_irqs()) irq = gsi; + legacy = mp_is_legacy_irq(irq); break; case IOAPIC_DOMAIN_STRICT: - if (irq_create_strict_mappings(domain, gsi, pin, 1) == 0) - irq = gsi; + irq = gsi; break; case IOAPIC_DOMAIN_DYNAMIC: - irq = irq_create_mapping(domain, pin); break; default: WARN(1, "ioapic: unknown irqdomain type %d\n", type); - break; + return -1; + } + + return __irq_domain_alloc_irqs(domain, irq, 1, + ioapic_alloc_attr_node(info), + info, legacy); +} + +/* + * Need special handling for ISA IRQs because there may be multiple IOAPIC pins + * sharing the same ISA IRQ number and irqdomain only supports 1:1 mapping + * between IOAPIC pin and IRQ number. A typical IOAPIC has 24 pins, pin 0-15 are + * used for legacy IRQs and pin 16-23 are used for PCI IRQs (PIRQ A-H). + * When ACPI is disabled, only legacy IRQ numbers (IRQ0-15) are available, and + * some BIOSes may use MP Interrupt Source records to override IRQ numbers for + * PIRQs instead of reprogramming the interrupt routing logic. Thus there may be + * multiple pins sharing the same legacy IRQ number when ACPI is disabled. + */ +static int alloc_isa_irq_from_domain(struct irq_domain *domain, + int irq, int ioapic, int pin, + struct irq_alloc_info *info) +{ + struct mp_chip_data *data; + struct irq_data *irq_data = irq_get_irq_data(irq); + int node = ioapic_alloc_attr_node(info); + + /* + * Legacy ISA IRQ has already been allocated, just add pin to + * the pin list assoicated with this IRQ and program the IOAPIC + * entry. The IOAPIC entry + */ + if (irq_data && irq_data->parent_data) { + if (!mp_check_pin_attr(irq, info)) + return -EBUSY; + if (__add_pin_to_irq_node(irq_data->chip_data, node, ioapic, + info->ioapic_pin)) + return -ENOMEM; + } else { + irq = __irq_domain_alloc_irqs(domain, irq, 1, node, info, true); + if (irq >= 0) { + irq_data = irq_domain_get_irq_data(domain, irq); + data = irq_data->chip_data; + data->isa_irq = true; + } } - return irq > 0 ? irq : -1; + return irq; } static int mp_map_pin_to_irq(u32 gsi, int idx, int ioapic, int pin, - unsigned int flags) + unsigned int flags, struct irq_alloc_info *info) { int irq; + bool legacy = false; + struct irq_alloc_info tmp; + struct mp_chip_data *data; struct irq_domain *domain = mp_ioapic_irqdomain(ioapic); - struct mp_pin_info *info = mp_pin_info(ioapic, pin); if (!domain) - return -1; + return -ENOSYS; - mutex_lock(&ioapic_mutex); - - /* - * Don't use irqdomain to manage ISA IRQs because there may be - * multiple IOAPIC pins sharing the same ISA IRQ number and - * irqdomain only supports 1:1 mapping between IOAPIC pin and - * IRQ number. A typical IOAPIC has 24 pins, pin 0-15 are used - * for legacy IRQs and pin 16-23 are used for PCI IRQs (PIRQ A-H). - * When ACPI is disabled, only legacy IRQ numbers (IRQ0-15) are - * available, and some BIOSes may use MP Interrupt Source records - * to override IRQ numbers for PIRQs instead of reprogramming - * the interrupt routing logic. Thus there may be multiple pins - * sharing the same legacy IRQ number when ACPI is disabled. - */ if (idx >= 0 && test_bit(mp_irqs[idx].srcbus, mp_bus_not_pci)) { irq = mp_irqs[idx].srcbusirq; - if (flags & IOAPIC_MAP_ALLOC) { - if (info->count == 0 && - mp_irqdomain_map(domain, irq, pin) != 0) - irq = -1; + legacy = mp_is_legacy_irq(irq); + } - /* special handling for timer IRQ0 */ + mutex_lock(&ioapic_mutex); + if (!(flags & IOAPIC_MAP_ALLOC)) { + if (!legacy) { + irq = irq_find_mapping(domain, pin); if (irq == 0) - info->count++; + irq = -ENOENT; } } else { - irq = irq_find_mapping(domain, pin); - if (irq <= 0 && (flags & IOAPIC_MAP_ALLOC)) - irq = alloc_irq_from_domain(domain, gsi, pin); - } - - if (flags & IOAPIC_MAP_ALLOC) { - /* special handling for legacy IRQs */ - if (irq < nr_legacy_irqs() && info->count == 1 && - mp_irqdomain_map(domain, irq, pin) != 0) - irq = -1; - - if (irq > 0) - info->count++; - else if (info->count == 0) - info->set = 0; + ioapic_copy_alloc_attr(&tmp, info, gsi, ioapic, pin); + if (legacy) + irq = alloc_isa_irq_from_domain(domain, irq, + ioapic, pin, &tmp); + else if ((irq = irq_find_mapping(domain, pin)) == 0) + irq = alloc_irq_from_domain(domain, ioapic, gsi, &tmp); + else if (!mp_check_pin_attr(irq, &tmp)) + irq = -EBUSY; + if (irq >= 0) { + data = irq_get_chip_data(irq); + data->count++; + } } - mutex_unlock(&ioapic_mutex); - return irq > 0 ? irq : -1; + return irq; } static int pin_2_irq(int idx, int ioapic, int pin, unsigned int flags) @@ -1058,10 +1098,10 @@ static int pin_2_irq(int idx, int ioapic, int pin, unsigned int flags) } #endif - return mp_map_pin_to_irq(gsi, idx, ioapic, pin, flags); + return mp_map_pin_to_irq(gsi, idx, ioapic, pin, flags, NULL); } -int mp_map_gsi_to_irq(u32 gsi, unsigned int flags) +int mp_map_gsi_to_irq(u32 gsi, unsigned int flags, struct irq_alloc_info *info) { int ioapic, pin, idx; @@ -1074,31 +1114,24 @@ int mp_map_gsi_to_irq(u32 gsi, unsigned int flags) if ((flags & IOAPIC_MAP_CHECK) && idx < 0) return -1; - return mp_map_pin_to_irq(gsi, idx, ioapic, pin, flags); + return mp_map_pin_to_irq(gsi, idx, ioapic, pin, flags, info); } void mp_unmap_irq(int irq) { - struct irq_data *data = irq_get_irq_data(irq); - struct mp_pin_info *info; - int ioapic, pin; + struct irq_data *irq_data = irq_get_irq_data(irq); + struct mp_chip_data *data; - if (!data || !data->domain) + if (!irq_data || !irq_data->domain) return; - ioapic = (int)(long)data->domain->host_data; - pin = (int)data->hwirq; - info = mp_pin_info(ioapic, pin); + data = irq_data->chip_data; + if (!data || data->isa_irq) + return; mutex_lock(&ioapic_mutex); - if (--info->count == 0) { - info->set = 0; - if (irq < nr_legacy_irqs() && - ioapics[ioapic].irqdomain_cfg.type == IOAPIC_DOMAIN_LEGACY) - mp_irqdomain_unmap(data->domain, irq); - else - irq_dispose_mapping(irq); - } + if (--data->count == 0) + irq_domain_free_irqs(irq, 1); mutex_unlock(&ioapic_mutex); } @@ -1165,7 +1198,7 @@ out: } EXPORT_SYMBOL(IO_APIC_get_PCI_irq_vector); -static struct irq_chip ioapic_chip; +static struct irq_chip ioapic_chip, ioapic_ir_chip; #ifdef CONFIG_X86_32 static inline int IO_APIC_irq_trigger(int irq) @@ -1189,96 +1222,6 @@ static inline int IO_APIC_irq_trigger(int irq) } #endif -static void ioapic_register_intr(unsigned int irq, struct irq_cfg *cfg, - unsigned long trigger) -{ - struct irq_chip *chip = &ioapic_chip; - irq_flow_handler_t hdl; - bool fasteoi; - - if ((trigger == IOAPIC_AUTO && IO_APIC_irq_trigger(irq)) || - trigger == IOAPIC_LEVEL) { - irq_set_status_flags(irq, IRQ_LEVEL); - fasteoi = true; - } else { - irq_clear_status_flags(irq, IRQ_LEVEL); - fasteoi = false; - } - - if (setup_remapped_irq(irq, cfg, chip)) - fasteoi = trigger != 0; - - hdl = fasteoi ? handle_fasteoi_irq : handle_edge_irq; - irq_set_chip_and_handler_name(irq, chip, hdl, - fasteoi ? "fasteoi" : "edge"); -} - -int native_setup_ioapic_entry(int irq, struct IO_APIC_route_entry *entry, - unsigned int destination, int vector, - struct io_apic_irq_attr *attr) -{ - memset(entry, 0, sizeof(*entry)); - - entry->delivery_mode = apic->irq_delivery_mode; - entry->dest_mode = apic->irq_dest_mode; - entry->dest = destination; - entry->vector = vector; - entry->mask = 0; /* enable IRQ */ - entry->trigger = attr->trigger; - entry->polarity = attr->polarity; - - /* - * Mask level triggered irqs. - * Use IRQ_DELAYED_DISABLE for edge triggered irqs. - */ - if (attr->trigger) - entry->mask = 1; - - return 0; -} - -static void setup_ioapic_irq(unsigned int irq, struct irq_cfg *cfg, - struct io_apic_irq_attr *attr) -{ - struct IO_APIC_route_entry entry; - unsigned int dest; - - if (!IO_APIC_IRQ(irq)) - return; - - if (assign_irq_vector(irq, cfg, apic->target_cpus())) - return; - - if (apic->cpu_mask_to_apicid_and(cfg->domain, apic->target_cpus(), - &dest)) { - pr_warn("Failed to obtain apicid for ioapic %d, pin %d\n", - mpc_ioapic_id(attr->ioapic), attr->ioapic_pin); - clear_irq_vector(irq, cfg); - - return; - } - - apic_printk(APIC_VERBOSE,KERN_DEBUG - "IOAPIC[%d]: Set routing entry (%d-%d -> 0x%x -> " - "IRQ %d Mode:%i Active:%i Dest:%d)\n", - attr->ioapic, mpc_ioapic_id(attr->ioapic), attr->ioapic_pin, - cfg->vector, irq, attr->trigger, attr->polarity, dest); - - if (x86_io_apic_ops.setup_entry(irq, &entry, dest, cfg->vector, attr)) { - pr_warn("Failed to setup ioapic entry for ioapic %d, pin %d\n", - mpc_ioapic_id(attr->ioapic), attr->ioapic_pin); - clear_irq_vector(irq, cfg); - - return; - } - - ioapic_register_intr(irq, cfg, attr->trigger); - if (irq < nr_legacy_irqs()) - legacy_pic->mask(irq); - - ioapic_write_entry(attr->ioapic, attr->ioapic_pin, entry); -} - static void __init setup_IO_APIC_irqs(void) { unsigned int ioapic, pin; @@ -1298,106 +1241,41 @@ static void __init setup_IO_APIC_irqs(void) } } -/* - * Set up the timer pin, possibly with the 8259A-master behind. - */ -static void __init setup_timer_IRQ0_pin(unsigned int ioapic_idx, - unsigned int pin, int vector) -{ - struct IO_APIC_route_entry entry; - unsigned int dest; - - memset(&entry, 0, sizeof(entry)); - - /* - * We use logical delivery to get the timer IRQ - * to the first CPU. - */ - if (unlikely(apic->cpu_mask_to_apicid_and(apic->target_cpus(), - apic->target_cpus(), &dest))) - dest = BAD_APICID; - - entry.dest_mode = apic->irq_dest_mode; - entry.mask = 0; /* don't mask IRQ for edge */ - entry.dest = dest; - entry.delivery_mode = apic->irq_delivery_mode; - entry.polarity = 0; - entry.trigger = 0; - entry.vector = vector; - - /* - * The timer IRQ doesn't have to know that behind the - * scene we may have a 8259A-master in AEOI mode ... - */ - irq_set_chip_and_handler_name(0, &ioapic_chip, handle_edge_irq, - "edge"); - - /* - * Add it to the IO-APIC irq-routing table: - */ - ioapic_write_entry(ioapic_idx, pin, entry); -} - -void native_io_apic_print_entries(unsigned int apic, unsigned int nr_entries) +void ioapic_zap_locks(void) { - int i; - - pr_debug(" NR Dst Mask Trig IRR Pol Stat Dmod Deli Vect:\n"); - - for (i = 0; i <= nr_entries; i++) { - struct IO_APIC_route_entry entry; - - entry = ioapic_read_entry(apic, i); - - pr_debug(" %02x %02X ", i, entry.dest); - pr_cont("%1d %1d %1d %1d %1d " - "%1d %1d %02X\n", - entry.mask, - entry.trigger, - entry.irr, - entry.polarity, - entry.delivery_status, - entry.dest_mode, - entry.delivery_mode, - entry.vector); - } + raw_spin_lock_init(&ioapic_lock); } -void intel_ir_io_apic_print_entries(unsigned int apic, - unsigned int nr_entries) +static void io_apic_print_entries(unsigned int apic, unsigned int nr_entries) { int i; + char buf[256]; + struct IO_APIC_route_entry entry; + struct IR_IO_APIC_route_entry *ir_entry = (void *)&entry; - pr_debug(" NR Indx Fmt Mask Trig IRR Pol Stat Indx2 Zero Vect:\n"); - + printk(KERN_DEBUG "IOAPIC %d:\n", apic); for (i = 0; i <= nr_entries; i++) { - struct IR_IO_APIC_route_entry *ir_entry; - struct IO_APIC_route_entry entry; - entry = ioapic_read_entry(apic, i); - - ir_entry = (struct IR_IO_APIC_route_entry *)&entry; - - pr_debug(" %02x %04X ", i, ir_entry->index); - pr_cont("%1d %1d %1d %1d %1d " - "%1d %1d %X %02X\n", - ir_entry->format, - ir_entry->mask, - ir_entry->trigger, - ir_entry->irr, - ir_entry->polarity, - ir_entry->delivery_status, - ir_entry->index2, - ir_entry->zero, - ir_entry->vector); + snprintf(buf, sizeof(buf), + " pin%02x, %s, %s, %s, V(%02X), IRR(%1d), S(%1d)", + i, + entry.mask == IOAPIC_MASKED ? "disabled" : "enabled ", + entry.trigger == IOAPIC_LEVEL ? "level" : "edge ", + entry.polarity == IOAPIC_POL_LOW ? "low " : "high", + entry.vector, entry.irr, entry.delivery_status); + if (ir_entry->format) + printk(KERN_DEBUG "%s, remapped, I(%04X), Z(%X)\n", + buf, (ir_entry->index << 15) | ir_entry->index, + ir_entry->zero); + else + printk(KERN_DEBUG "%s, %s, D(%02X), M(%1d)\n", + buf, + entry.dest_mode == IOAPIC_DEST_MODE_LOGICAL ? + "logical " : "physical", + entry.dest, entry.delivery_mode); } } -void ioapic_zap_locks(void) -{ - raw_spin_lock_init(&ioapic_lock); -} - static void __init print_IO_APIC(int ioapic_idx) { union IO_APIC_reg_00 reg_00; @@ -1451,16 +1329,13 @@ static void __init print_IO_APIC(int ioapic_idx) } printk(KERN_DEBUG ".... IRQ redirection table:\n"); - - x86_io_apic_ops.print_entries(ioapic_idx, reg_01.bits.entries); + io_apic_print_entries(ioapic_idx, reg_01.bits.entries); } void __init print_IO_APICs(void) { int ioapic_idx; - struct irq_cfg *cfg; unsigned int irq; - struct irq_chip *chip; printk(KERN_DEBUG "number of MP IRQ sources: %d.\n", mp_irq_entries); for_each_ioapic(ioapic_idx) @@ -1480,18 +1355,20 @@ void __init print_IO_APICs(void) printk(KERN_DEBUG "IRQ to pin mappings:\n"); for_each_active_irq(irq) { struct irq_pin_list *entry; + struct irq_chip *chip; + struct mp_chip_data *data; chip = irq_get_chip(irq); - if (chip != &ioapic_chip) + if (chip != &ioapic_chip && chip != &ioapic_ir_chip) continue; - - cfg = irq_cfg(irq); - if (!cfg) + data = irq_get_chip_data(irq); + if (!data) continue; - if (list_empty(&cfg->irq_2_pin)) + if (list_empty(&data->irq_2_pin)) continue; + printk(KERN_DEBUG "IRQ%d ", irq); - for_each_irq_pin(entry, cfg->irq_2_pin) + for_each_irq_pin(entry, data->irq_2_pin) pr_cont("-> %d:%d", entry->apic, entry->pin); pr_cont("\n"); } @@ -1564,15 +1441,12 @@ void native_disable_io_apic(void) struct IO_APIC_route_entry entry; memset(&entry, 0, sizeof(entry)); - entry.mask = 0; /* Enabled */ - entry.trigger = 0; /* Edge */ - entry.irr = 0; - entry.polarity = 0; /* High */ - entry.delivery_status = 0; - entry.dest_mode = 0; /* Physical */ - entry.delivery_mode = dest_ExtINT; /* ExtInt */ - entry.vector = 0; - entry.dest = read_apic_id(); + entry.mask = IOAPIC_UNMASKED; + entry.trigger = IOAPIC_EDGE; + entry.polarity = IOAPIC_POL_HIGH; + entry.dest_mode = IOAPIC_DEST_MODE_PHYSICAL; + entry.delivery_mode = dest_ExtINT; + entry.dest = read_apic_id(); /* * Add it to the IO-APIC irq-routing table: @@ -1582,7 +1456,6 @@ void native_disable_io_apic(void) if (cpu_has_apic || apic_from_smp_config()) disconnect_bsp_APIC(ioapic_i8259.pin != -1); - } /* @@ -1792,7 +1665,6 @@ static int __init timer_irq_works(void) * This is not complete - we should be able to fake * an edge even if it isn't on the 8259A... */ - static unsigned int startup_ioapic_irq(struct irq_data *data) { int was_pending = 0, irq = data->irq; @@ -1804,74 +1676,22 @@ static unsigned int startup_ioapic_irq(struct irq_data *data) if (legacy_pic->irq_pending(irq)) was_pending = 1; } - __unmask_ioapic(irqd_cfg(data)); + __unmask_ioapic(data->chip_data); raw_spin_unlock_irqrestore(&ioapic_lock, flags); return was_pending; } -/* - * Level and edge triggered IO-APIC interrupts need different handling, - * so we use two separate IRQ descriptors. Edge triggered IRQs can be - * handled with the level-triggered descriptor, but that one has slightly - * more overhead. Level-triggered interrupts cannot be handled with the - * edge-triggered handler, without risking IRQ storms and other ugly - * races. - */ - -static void __target_IO_APIC_irq(unsigned int irq, unsigned int dest, struct irq_cfg *cfg) -{ - int apic, pin; - struct irq_pin_list *entry; - u8 vector = cfg->vector; - - for_each_irq_pin(entry, cfg->irq_2_pin) { - unsigned int reg; - - apic = entry->apic; - pin = entry->pin; - - io_apic_write(apic, 0x11 + pin*2, dest); - reg = io_apic_read(apic, 0x10 + pin*2); - reg &= ~IO_APIC_REDIR_VECTOR_MASK; - reg |= vector; - io_apic_modify(apic, 0x10 + pin*2, reg); - } -} - -int native_ioapic_set_affinity(struct irq_data *data, - const struct cpumask *mask, - bool force) -{ - unsigned int dest, irq = data->irq; - unsigned long flags; - int ret; - - if (!config_enabled(CONFIG_SMP)) - return -EPERM; - - raw_spin_lock_irqsave(&ioapic_lock, flags); - ret = apic_set_affinity(data, mask, &dest); - if (!ret) { - /* Only the high 8 bits are valid. */ - dest = SET_APIC_LOGICAL_ID(dest); - __target_IO_APIC_irq(irq, dest, irqd_cfg(data)); - ret = IRQ_SET_MASK_OK_NOCOPY; - } - raw_spin_unlock_irqrestore(&ioapic_lock, flags); - return ret; -} - atomic_t irq_mis_count; #ifdef CONFIG_GENERIC_PENDING_IRQ -static bool io_apic_level_ack_pending(struct irq_cfg *cfg) +static bool io_apic_level_ack_pending(struct mp_chip_data *data) { struct irq_pin_list *entry; unsigned long flags; raw_spin_lock_irqsave(&ioapic_lock, flags); - for_each_irq_pin(entry, cfg->irq_2_pin) { + for_each_irq_pin(entry, data->irq_2_pin) { unsigned int reg; int pin; @@ -1888,18 +1708,17 @@ static bool io_apic_level_ack_pending(struct irq_cfg *cfg) return false; } -static inline bool ioapic_irqd_mask(struct irq_data *data, struct irq_cfg *cfg) +static inline bool ioapic_irqd_mask(struct irq_data *data) { /* If we are moving the irq we need to mask it */ if (unlikely(irqd_is_setaffinity_pending(data))) { - mask_ioapic(cfg); + mask_ioapic_irq(data); return true; } return false; } -static inline void ioapic_irqd_unmask(struct irq_data *data, - struct irq_cfg *cfg, bool masked) +static inline void ioapic_irqd_unmask(struct irq_data *data, bool masked) { if (unlikely(masked)) { /* Only migrate the irq if the ack has been received. @@ -1928,31 +1747,30 @@ static inline void ioapic_irqd_unmask(struct irq_data *data, * accurate and is causing problems then it is a hardware bug * and you can go talk to the chipset vendor about it. */ - if (!io_apic_level_ack_pending(cfg)) + if (!io_apic_level_ack_pending(data->chip_data)) irq_move_masked_irq(data); - unmask_ioapic(cfg); + unmask_ioapic_irq(data); } } #else -static inline bool ioapic_irqd_mask(struct irq_data *data, struct irq_cfg *cfg) +static inline bool ioapic_irqd_mask(struct irq_data *data) { return false; } -static inline void ioapic_irqd_unmask(struct irq_data *data, - struct irq_cfg *cfg, bool masked) +static inline void ioapic_irqd_unmask(struct irq_data *data, bool masked) { } #endif -static void ack_ioapic_level(struct irq_data *data) +static void ioapic_ack_level(struct irq_data *irq_data) { - struct irq_cfg *cfg = irqd_cfg(data); - int i, irq = data->irq; + struct irq_cfg *cfg = irqd_cfg(irq_data); unsigned long v; bool masked; + int i; irq_complete_move(cfg); - masked = ioapic_irqd_mask(data, cfg); + masked = ioapic_irqd_mask(irq_data); /* * It appears there is an erratum which affects at least version 0x11 @@ -2004,11 +1822,49 @@ static void ack_ioapic_level(struct irq_data *data) */ if (!(v & (1 << (i & 0x1f)))) { atomic_inc(&irq_mis_count); + eoi_ioapic_pin(cfg->vector, irq_data->chip_data); + } + + ioapic_irqd_unmask(irq_data, masked); +} + +static void ioapic_ir_ack_level(struct irq_data *irq_data) +{ + struct mp_chip_data *data = irq_data->chip_data; + + /* + * Intr-remapping uses pin number as the virtual vector + * in the RTE. Actual vector is programmed in + * intr-remapping table entry. Hence for the io-apic + * EOI we use the pin number. + */ + ack_APIC_irq(); + eoi_ioapic_pin(data->entry.vector, data); +} - eoi_ioapic_irq(irq, cfg); +static int ioapic_set_affinity(struct irq_data *irq_data, + const struct cpumask *mask, bool force) +{ + struct irq_data *parent = irq_data->parent_data; + struct mp_chip_data *data = irq_data->chip_data; + struct irq_pin_list *entry; + struct irq_cfg *cfg; + unsigned long flags; + int ret; + + ret = parent->chip->irq_set_affinity(parent, mask, force); + raw_spin_lock_irqsave(&ioapic_lock, flags); + if (ret >= 0 && ret != IRQ_SET_MASK_OK_DONE) { + cfg = irqd_cfg(irq_data); + data->entry.dest = cfg->dest_apicid; + data->entry.vector = cfg->vector; + for_each_irq_pin(entry, data->irq_2_pin) + __ioapic_write_entry(entry->apic, entry->pin, + data->entry); } + raw_spin_unlock_irqrestore(&ioapic_lock, flags); - ioapic_irqd_unmask(data, cfg, masked); + return ret; } static struct irq_chip ioapic_chip __read_mostly = { @@ -2016,10 +1872,20 @@ static struct irq_chip ioapic_chip __read_mostly = { .irq_startup = startup_ioapic_irq, .irq_mask = mask_ioapic_irq, .irq_unmask = unmask_ioapic_irq, - .irq_ack = apic_ack_edge, - .irq_eoi = ack_ioapic_level, - .irq_set_affinity = native_ioapic_set_affinity, - .irq_retrigger = apic_retrigger_irq, + .irq_ack = irq_chip_ack_parent, + .irq_eoi = ioapic_ack_level, + .irq_set_affinity = ioapic_set_affinity, + .flags = IRQCHIP_SKIP_SET_WAKE, +}; + +static struct irq_chip ioapic_ir_chip __read_mostly = { + .name = "IR-IO-APIC", + .irq_startup = startup_ioapic_irq, + .irq_mask = mask_ioapic_irq, + .irq_unmask = unmask_ioapic_irq, + .irq_ack = irq_chip_ack_parent, + .irq_eoi = ioapic_ir_ack_level, + .irq_set_affinity = ioapic_set_affinity, .flags = IRQCHIP_SKIP_SET_WAKE, }; @@ -2113,12 +1979,12 @@ static inline void __init unlock_ExtINT_logic(void) memset(&entry1, 0, sizeof(entry1)); - entry1.dest_mode = 0; /* physical delivery */ - entry1.mask = 0; /* unmask IRQ now */ + entry1.dest_mode = IOAPIC_DEST_MODE_PHYSICAL; + entry1.mask = IOAPIC_UNMASKED; entry1.dest = hard_smp_processor_id(); entry1.delivery_mode = dest_ExtINT; entry1.polarity = entry0.polarity; - entry1.trigger = 0; + entry1.trigger = IOAPIC_EDGE; entry1.vector = 0; ioapic_write_entry(apic, pin, entry1); @@ -2152,6 +2018,25 @@ static int __init disable_timer_pin_setup(char *arg) } early_param("disable_timer_pin_1", disable_timer_pin_setup); +static int mp_alloc_timer_irq(int ioapic, int pin) +{ + int irq = -1; + struct irq_domain *domain = mp_ioapic_irqdomain(ioapic); + + if (domain) { + struct irq_alloc_info info; + + ioapic_set_alloc_attr(&info, NUMA_NO_NODE, 0, 0); + info.ioapic_id = mpc_ioapic_id(ioapic); + info.ioapic_pin = pin; + mutex_lock(&ioapic_mutex); + irq = alloc_isa_irq_from_domain(domain, 0, ioapic, pin, &info); + mutex_unlock(&ioapic_mutex); + } + + return irq; +} + /* * This code may look a bit paranoid, but it's supposed to cooperate with * a wide range of boards and BIOS bugs. Fortunately only the timer IRQ @@ -2162,7 +2047,9 @@ early_param("disable_timer_pin_1", disable_timer_pin_setup); */ static inline void __init check_timer(void) { - struct irq_cfg *cfg = irq_cfg(0); + struct irq_data *irq_data = irq_get_irq_data(0); + struct mp_chip_data *data = irq_data->chip_data; + struct irq_cfg *cfg = irqd_cfg(irq_data); int node = cpu_to_node(0); int apic1, pin1, apic2, pin2; unsigned long flags; @@ -2174,7 +2061,6 @@ static inline void __init check_timer(void) * get/set the timer IRQ vector: */ legacy_pic->mask(0); - assign_irq_vector(0, cfg, apic->target_cpus()); /* * As IRQ0 is to be enabled in the 8259A, the virtual @@ -2215,23 +2101,21 @@ static inline void __init check_timer(void) } if (pin1 != -1) { - /* - * Ok, does IRQ0 through the IOAPIC work? - */ + /* Ok, does IRQ0 through the IOAPIC work? */ if (no_pin1) { - add_pin_to_irq_node(cfg, node, apic1, pin1); - setup_timer_IRQ0_pin(apic1, pin1, cfg->vector); + mp_alloc_timer_irq(apic1, pin1); } else { - /* for edge trigger, setup_ioapic_irq already - * leave it unmasked. + /* + * for edge trigger, it's already unmasked, * so only need to unmask if it is level-trigger * do we really have level trigger timer? */ int idx; idx = find_irq_entry(apic1, pin1, mp_INT); if (idx != -1 && irq_trigger(idx)) - unmask_ioapic(cfg); + unmask_ioapic_irq(irq_get_chip_data(0)); } + irq_domain_activate_irq(irq_data); if (timer_irq_works()) { if (disable_timer_pin_1 > 0) clear_IO_APIC_pin(0, pin1); @@ -2251,8 +2135,8 @@ static inline void __init check_timer(void) /* * legacy devices should be connected to IO APIC #0 */ - replace_pin_at_irq_node(cfg, node, apic1, pin1, apic2, pin2); - setup_timer_IRQ0_pin(apic2, pin2, cfg->vector); + replace_pin_at_irq_node(data, node, apic1, pin1, apic2, pin2); + irq_domain_activate_irq(irq_data); legacy_pic->unmask(0); if (timer_irq_works()) { apic_printk(APIC_QUIET, KERN_INFO "....... works.\n"); @@ -2329,36 +2213,35 @@ out: static int mp_irqdomain_create(int ioapic) { - size_t size; + struct irq_alloc_info info; + struct irq_domain *parent; int hwirqs = mp_ioapic_pin_count(ioapic); struct ioapic *ip = &ioapics[ioapic]; struct ioapic_domain_cfg *cfg = &ip->irqdomain_cfg; struct mp_ioapic_gsi *gsi_cfg = mp_ioapic_gsi_routing(ioapic); - size = sizeof(struct mp_pin_info) * mp_ioapic_pin_count(ioapic); - ip->pin_info = kzalloc(size, GFP_KERNEL); - if (!ip->pin_info) - return -ENOMEM; - if (cfg->type == IOAPIC_DOMAIN_INVALID) return 0; + init_irq_alloc_info(&info, NULL); + info.type = X86_IRQ_ALLOC_TYPE_IOAPIC; + info.ioapic_id = mpc_ioapic_id(ioapic); + parent = irq_remapping_get_ir_irq_domain(&info); + if (!parent) + parent = x86_vector_domain; + ip->irqdomain = irq_domain_add_linear(cfg->dev, hwirqs, cfg->ops, (void *)(long)ioapic); - if(!ip->irqdomain) { - kfree(ip->pin_info); - ip->pin_info = NULL; + if (!ip->irqdomain) return -ENOMEM; - } + + ip->irqdomain->parent = parent; if (cfg->type == IOAPIC_DOMAIN_LEGACY || cfg->type == IOAPIC_DOMAIN_STRICT) ioapic_dynirq_base = max(ioapic_dynirq_base, gsi_cfg->gsi_end + 1); - if (gsi_cfg->gsi_base == 0) - irq_set_default_host(ip->irqdomain); - return 0; } @@ -2368,8 +2251,6 @@ static void ioapic_destroy_irqdomain(int idx) irq_domain_remove(ioapics[idx].irqdomain); ioapics[idx].irqdomain = NULL; } - kfree(ioapics[idx].pin_info); - ioapics[idx].pin_info = NULL; } void __init setup_IO_APIC(void) @@ -2399,20 +2280,6 @@ void __init setup_IO_APIC(void) ioapic_initialized = 1; } -/* - * Called after all the initialization is done. If we didn't find any - * APIC bugs then we can allow the modify fast path - */ - -static int __init io_apic_bug_finalize(void) -{ - if (sis_apic_bug == -1) - sis_apic_bug = 0; - return 0; -} - -late_initcall(io_apic_bug_finalize); - static void resume_ioapic_id(int ioapic_idx) { unsigned long flags; @@ -2451,20 +2318,6 @@ static int __init ioapic_init_ops(void) device_initcall(ioapic_init_ops); -static int -io_apic_setup_irq_pin(unsigned int irq, int node, struct io_apic_irq_attr *attr) -{ - struct irq_cfg *cfg = alloc_irq_and_cfg_at(irq, node); - int ret; - - if (!cfg) - return -EINVAL; - ret = __add_pin_to_irq_node(cfg, node, attr->ioapic, attr->ioapic_pin); - if (!ret) - setup_ioapic_irq(irq, cfg, attr); - return ret; -} - static int io_apic_get_redir_entries(int ioapic) { union IO_APIC_reg_01 reg_01; @@ -2692,7 +2545,7 @@ void __init setup_ioapic_dest(void) else mask = apic->target_cpus(); - x86_io_apic_ops.set_affinity(idata, mask, false); + irq_set_affinity(irq, mask); } } @@ -2737,7 +2590,7 @@ static struct resource * __init ioapic_setup_resources(void) return res; } -void __init native_io_apic_init_mappings(void) +void __init io_apic_init_mappings(void) { unsigned long ioapic_phys, idx = FIX_IO_APIC_BASE_0; struct resource *ioapic_res; @@ -2962,7 +2815,6 @@ int mp_unregister_ioapic(u32 gsi_base) { int ioapic, pin; int found = 0; - struct mp_pin_info *pin_info; for_each_ioapic(ioapic) if (ioapics[ioapic].gsi_config.gsi_base == gsi_base) { @@ -2975,11 +2827,17 @@ int mp_unregister_ioapic(u32 gsi_base) } for_each_pin(ioapic, pin) { - pin_info = mp_pin_info(ioapic, pin); - if (pin_info->count) { - pr_warn("pin%d on IOAPIC%d is still in use.\n", - pin, ioapic); - return -EBUSY; + u32 gsi = mp_pin_to_gsi(ioapic, pin); + int irq = mp_map_gsi_to_irq(gsi, 0, NULL); + struct mp_chip_data *data; + + if (irq >= 0) { + data = irq_get_chip_data(irq); + if (data && data->count) { + pr_warn("pin%d on IOAPIC%d is still in use.\n", + pin, ioapic); + return -EBUSY; + } } } @@ -3006,108 +2864,141 @@ int mp_ioapic_registered(u32 gsi_base) return 0; } -static inline void set_io_apic_irq_attr(struct io_apic_irq_attr *irq_attr, - int ioapic, int ioapic_pin, - int trigger, int polarity) +static void mp_irqdomain_get_attr(u32 gsi, struct mp_chip_data *data, + struct irq_alloc_info *info) { - irq_attr->ioapic = ioapic; - irq_attr->ioapic_pin = ioapic_pin; - irq_attr->trigger = trigger; - irq_attr->polarity = polarity; + if (info && info->ioapic_valid) { + data->trigger = info->ioapic_trigger; + data->polarity = info->ioapic_polarity; + } else if (acpi_get_override_irq(gsi, &data->trigger, + &data->polarity) < 0) { + /* PCI interrupts are always active low level triggered. */ + data->trigger = IOAPIC_LEVEL; + data->polarity = IOAPIC_POL_LOW; + } } -int mp_irqdomain_map(struct irq_domain *domain, unsigned int virq, - irq_hw_number_t hwirq) +static void mp_setup_entry(struct irq_cfg *cfg, struct mp_chip_data *data, + struct IO_APIC_route_entry *entry) { - int ioapic = (int)(long)domain->host_data; - struct mp_pin_info *info = mp_pin_info(ioapic, hwirq); - struct io_apic_irq_attr attr; + memset(entry, 0, sizeof(*entry)); + entry->delivery_mode = apic->irq_delivery_mode; + entry->dest_mode = apic->irq_dest_mode; + entry->dest = cfg->dest_apicid; + entry->vector = cfg->vector; + entry->trigger = data->trigger; + entry->polarity = data->polarity; + /* + * Mask level triggered irqs. Edge triggered irqs are masked + * by the irq core code in case they fire. + */ + if (data->trigger == IOAPIC_LEVEL) + entry->mask = IOAPIC_MASKED; + else + entry->mask = IOAPIC_UNMASKED; +} - /* Get default attribute if not set by caller yet */ - if (!info->set) { - u32 gsi = mp_pin_to_gsi(ioapic, hwirq); +int mp_irqdomain_alloc(struct irq_domain *domain, unsigned int virq, + unsigned int nr_irqs, void *arg) +{ + int ret, ioapic, pin; + struct irq_cfg *cfg; + struct irq_data *irq_data; + struct mp_chip_data *data; + struct irq_alloc_info *info = arg; - if (acpi_get_override_irq(gsi, &info->trigger, - &info->polarity) < 0) { - /* - * PCI interrupts are always polarity one level - * triggered. - */ - info->trigger = 1; - info->polarity = 1; - } - info->node = NUMA_NO_NODE; + if (!info || nr_irqs > 1) + return -EINVAL; + irq_data = irq_domain_get_irq_data(domain, virq); + if (!irq_data) + return -EINVAL; - /* - * setup_IO_APIC_irqs() programs all legacy IRQs with default - * trigger and polarity attributes. Don't set the flag for that - * case so the first legacy IRQ user could reprogram the pin - * with real trigger and polarity attributes. - */ - if (virq >= nr_legacy_irqs() || info->count) - info->set = 1; - } - set_io_apic_irq_attr(&attr, ioapic, hwirq, info->trigger, - info->polarity); + ioapic = mp_irqdomain_ioapic_idx(domain); + pin = info->ioapic_pin; + if (irq_find_mapping(domain, (irq_hw_number_t)pin) > 0) + return -EEXIST; - return io_apic_setup_irq_pin(virq, info->node, &attr); -} + data = kzalloc(sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; -void mp_irqdomain_unmap(struct irq_domain *domain, unsigned int virq) -{ - struct irq_data *data = irq_get_irq_data(virq); - struct irq_cfg *cfg = irq_cfg(virq); - int ioapic = (int)(long)domain->host_data; - int pin = (int)data->hwirq; + info->ioapic_entry = &data->entry; + ret = irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, info); + if (ret < 0) { + kfree(data); + return ret; + } + + INIT_LIST_HEAD(&data->irq_2_pin); + irq_data->hwirq = info->ioapic_pin; + irq_data->chip = (domain->parent == x86_vector_domain) ? + &ioapic_chip : &ioapic_ir_chip; + irq_data->chip_data = data; + mp_irqdomain_get_attr(mp_pin_to_gsi(ioapic, pin), data, info); + + cfg = irqd_cfg(irq_data); + add_pin_to_irq_node(data, ioapic_alloc_attr_node(info), ioapic, pin); + if (info->ioapic_entry) + mp_setup_entry(cfg, data, info->ioapic_entry); + mp_register_handler(virq, data->trigger); + if (virq < nr_legacy_irqs()) + legacy_pic->mask(virq); + + apic_printk(APIC_VERBOSE, KERN_DEBUG + "IOAPIC[%d]: Set routing entry (%d-%d -> 0x%x -> IRQ %d Mode:%i Active:%i Dest:%d)\n", + ioapic, mpc_ioapic_id(ioapic), pin, cfg->vector, + virq, data->trigger, data->polarity, cfg->dest_apicid); - ioapic_mask_entry(ioapic, pin); - __remove_pin_from_irq(cfg, ioapic, pin); - WARN_ON(!list_empty(&cfg->irq_2_pin)); - arch_teardown_hwirq(virq); + return 0; } -int mp_set_gsi_attr(u32 gsi, int trigger, int polarity, int node) +void mp_irqdomain_free(struct irq_domain *domain, unsigned int virq, + unsigned int nr_irqs) { - int ret = 0; - int ioapic, pin; - struct mp_pin_info *info; + struct irq_data *irq_data; + struct mp_chip_data *data; - ioapic = mp_find_ioapic(gsi); - if (ioapic < 0) - return -ENODEV; - - pin = mp_find_ioapic_pin(ioapic, gsi); - info = mp_pin_info(ioapic, pin); - trigger = trigger ? 1 : 0; - polarity = polarity ? 1 : 0; - - mutex_lock(&ioapic_mutex); - if (!info->set) { - info->trigger = trigger; - info->polarity = polarity; - info->node = node; - info->set = 1; - } else if (info->trigger != trigger || info->polarity != polarity) { - ret = -EBUSY; + BUG_ON(nr_irqs != 1); + irq_data = irq_domain_get_irq_data(domain, virq); + if (irq_data && irq_data->chip_data) { + data = irq_data->chip_data; + __remove_pin_from_irq(data, mp_irqdomain_ioapic_idx(domain), + (int)irq_data->hwirq); + WARN_ON(!list_empty(&data->irq_2_pin)); + kfree(irq_data->chip_data); } - mutex_unlock(&ioapic_mutex); - - return ret; + irq_domain_free_irqs_top(domain, virq, nr_irqs); } -/* Enable IOAPIC early just for system timer */ -void __init pre_init_apic_IRQ0(void) +void mp_irqdomain_activate(struct irq_domain *domain, + struct irq_data *irq_data) { - struct io_apic_irq_attr attr = { 0, 0, 0, 0 }; + unsigned long flags; + struct irq_pin_list *entry; + struct mp_chip_data *data = irq_data->chip_data; - printk(KERN_INFO "Early APIC setup for system timer0\n"); -#ifndef CONFIG_SMP - physid_set_mask_of_physid(boot_cpu_physical_apicid, - &phys_cpu_present_map); -#endif - setup_local_APIC(); + raw_spin_lock_irqsave(&ioapic_lock, flags); + for_each_irq_pin(entry, data->irq_2_pin) + __ioapic_write_entry(entry->apic, entry->pin, data->entry); + raw_spin_unlock_irqrestore(&ioapic_lock, flags); +} - io_apic_setup_irq_pin(0, 0, &attr); - irq_set_chip_and_handler_name(0, &ioapic_chip, handle_edge_irq, - "edge"); +void mp_irqdomain_deactivate(struct irq_domain *domain, + struct irq_data *irq_data) +{ + /* It won't be called for IRQ with multiple IOAPIC pins associated */ + ioapic_mask_entry(mp_irqdomain_ioapic_idx(domain), + (int)irq_data->hwirq); +} + +int mp_irqdomain_ioapic_idx(struct irq_domain *domain) +{ + return (int)(long)domain->host_data; } + +const struct irq_domain_ops mp_ioapic_irqdomain_ops = { + .alloc = mp_irqdomain_alloc, + .free = mp_irqdomain_free, + .activate = mp_irqdomain_activate, + .deactivate = mp_irqdomain_deactivate, +}; diff --git a/arch/x86/kernel/apic/msi.c b/arch/x86/kernel/apic/msi.c index d6ba2d6..1a9d735 100644 --- a/arch/x86/kernel/apic/msi.c +++ b/arch/x86/kernel/apic/msi.c @@ -3,6 +3,8 @@ * * Copyright (C) 1997, 1998, 1999, 2000, 2009 Ingo Molnar, Hajnalka Szabo * Moved from arch/x86/kernel/apic/io_apic.c. + * Jiang Liu <jiang.liu@linux.intel.com> + * Convert to hierarchical irqdomain * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as @@ -14,22 +16,23 @@ #include <linux/dmar.h> #include <linux/hpet.h> #include <linux/msi.h> +#include <asm/irqdomain.h> #include <asm/msidef.h> #include <asm/hpet.h> #include <asm/hw_irq.h> #include <asm/apic.h> #include <asm/irq_remapping.h> -void native_compose_msi_msg(struct pci_dev *pdev, - unsigned int irq, unsigned int dest, - struct msi_msg *msg, u8 hpet_id) +static struct irq_domain *msi_default_domain; + +static void irq_msi_compose_msg(struct irq_data *data, struct msi_msg *msg) { - struct irq_cfg *cfg = irq_cfg(irq); + struct irq_cfg *cfg = irqd_cfg(data); msg->address_hi = MSI_ADDR_BASE_HI; if (x2apic_enabled()) - msg->address_hi |= MSI_ADDR_EXT_DEST_ID(dest); + msg->address_hi |= MSI_ADDR_EXT_DEST_ID(cfg->dest_apicid); msg->address_lo = MSI_ADDR_BASE_LO | @@ -39,7 +42,7 @@ void native_compose_msi_msg(struct pci_dev *pdev, ((apic->irq_delivery_mode != dest_LowestPrio) ? MSI_ADDR_REDIRECTION_CPU : MSI_ADDR_REDIRECTION_LOWPRI) | - MSI_ADDR_DEST_ID(dest); + MSI_ADDR_DEST_ID(cfg->dest_apicid); msg->data = MSI_DATA_TRIGGER_EDGE | @@ -50,180 +53,201 @@ void native_compose_msi_msg(struct pci_dev *pdev, MSI_DATA_VECTOR(cfg->vector); } -static int msi_compose_msg(struct pci_dev *pdev, unsigned int irq, - struct msi_msg *msg, u8 hpet_id) +/* + * IRQ Chip for MSI PCI/PCI-X/PCI-Express Devices, + * which implement the MSI or MSI-X Capability Structure. + */ +static struct irq_chip pci_msi_controller = { + .name = "PCI-MSI", + .irq_unmask = pci_msi_unmask_irq, + .irq_mask = pci_msi_mask_irq, + .irq_ack = irq_chip_ack_parent, + .irq_retrigger = irq_chip_retrigger_hierarchy, + .irq_compose_msi_msg = irq_msi_compose_msg, + .flags = IRQCHIP_SKIP_SET_WAKE, +}; + +int native_setup_msi_irqs(struct pci_dev *dev, int nvec, int type) { - struct irq_cfg *cfg; - int err; - unsigned dest; + struct irq_domain *domain; + struct irq_alloc_info info; - if (disable_apic) - return -ENXIO; + init_irq_alloc_info(&info, NULL); + info.type = X86_IRQ_ALLOC_TYPE_MSI; + info.msi_dev = dev; - cfg = irq_cfg(irq); - err = assign_irq_vector(irq, cfg, apic->target_cpus()); - if (err) - return err; + domain = irq_remapping_get_irq_domain(&info); + if (domain == NULL) + domain = msi_default_domain; + if (domain == NULL) + return -ENOSYS; - err = apic->cpu_mask_to_apicid_and(cfg->domain, - apic->target_cpus(), &dest); - if (err) - return err; + return pci_msi_domain_alloc_irqs(domain, dev, nvec, type); +} - x86_msi.compose_msi_msg(pdev, irq, dest, msg, hpet_id); +void native_teardown_msi_irq(unsigned int irq) +{ + irq_domain_free_irqs(irq, 1); +} - return 0; +static irq_hw_number_t pci_msi_get_hwirq(struct msi_domain_info *info, + msi_alloc_info_t *arg) +{ + return arg->msi_hwirq; } -static int -msi_set_affinity(struct irq_data *data, const struct cpumask *mask, bool force) +static int pci_msi_prepare(struct irq_domain *domain, struct device *dev, + int nvec, msi_alloc_info_t *arg) { - struct irq_cfg *cfg = irqd_cfg(data); - struct msi_msg msg; - unsigned int dest; - int ret; + struct pci_dev *pdev = to_pci_dev(dev); + struct msi_desc *desc = first_pci_msi_entry(pdev); + + init_irq_alloc_info(arg, NULL); + arg->msi_dev = pdev; + if (desc->msi_attrib.is_msix) { + arg->type = X86_IRQ_ALLOC_TYPE_MSIX; + } else { + arg->type = X86_IRQ_ALLOC_TYPE_MSI; + arg->flags |= X86_IRQ_ALLOC_CONTIGUOUS_VECTORS; + } - ret = apic_set_affinity(data, mask, &dest); - if (ret) - return ret; + return 0; +} - __get_cached_msi_msg(data->msi_desc, &msg); +static void pci_msi_set_desc(msi_alloc_info_t *arg, struct msi_desc *desc) +{ + arg->msi_hwirq = pci_msi_domain_calc_hwirq(arg->msi_dev, desc); +} + +static struct msi_domain_ops pci_msi_domain_ops = { + .get_hwirq = pci_msi_get_hwirq, + .msi_prepare = pci_msi_prepare, + .set_desc = pci_msi_set_desc, +}; - msg.data &= ~MSI_DATA_VECTOR_MASK; - msg.data |= MSI_DATA_VECTOR(cfg->vector); - msg.address_lo &= ~MSI_ADDR_DEST_ID_MASK; - msg.address_lo |= MSI_ADDR_DEST_ID(dest); +static struct msi_domain_info pci_msi_domain_info = { + .flags = MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS | + MSI_FLAG_PCI_MSIX, + .ops = &pci_msi_domain_ops, + .chip = &pci_msi_controller, + .handler = handle_edge_irq, + .handler_name = "edge", +}; - __pci_write_msi_msg(data->msi_desc, &msg); +void arch_init_msi_domain(struct irq_domain *parent) +{ + if (disable_apic) + return; - return IRQ_SET_MASK_OK_NOCOPY; + msi_default_domain = pci_msi_create_irq_domain(NULL, + &pci_msi_domain_info, parent); + if (!msi_default_domain) + pr_warn("failed to initialize irqdomain for MSI/MSI-x.\n"); } -/* - * IRQ Chip for MSI PCI/PCI-X/PCI-Express Devices, - * which implement the MSI or MSI-X Capability Structure. - */ -static struct irq_chip msi_chip = { - .name = "PCI-MSI", +#ifdef CONFIG_IRQ_REMAP +static struct irq_chip pci_msi_ir_controller = { + .name = "IR-PCI-MSI", .irq_unmask = pci_msi_unmask_irq, .irq_mask = pci_msi_mask_irq, - .irq_ack = apic_ack_edge, - .irq_set_affinity = msi_set_affinity, - .irq_retrigger = apic_retrigger_irq, + .irq_ack = irq_chip_ack_parent, + .irq_retrigger = irq_chip_retrigger_hierarchy, + .irq_set_vcpu_affinity = irq_chip_set_vcpu_affinity_parent, .flags = IRQCHIP_SKIP_SET_WAKE, }; -int setup_msi_irq(struct pci_dev *dev, struct msi_desc *msidesc, - unsigned int irq_base, unsigned int irq_offset) -{ - struct irq_chip *chip = &msi_chip; - struct msi_msg msg; - unsigned int irq = irq_base + irq_offset; - int ret; - - ret = msi_compose_msg(dev, irq, &msg, -1); - if (ret < 0) - return ret; - - irq_set_msi_desc_off(irq_base, irq_offset, msidesc); - - /* - * MSI-X message is written per-IRQ, the offset is always 0. - * MSI message denotes a contiguous group of IRQs, written for 0th IRQ. - */ - if (!irq_offset) - pci_write_msi_msg(irq, &msg); +static struct msi_domain_info pci_msi_ir_domain_info = { + .flags = MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS | + MSI_FLAG_MULTI_PCI_MSI | MSI_FLAG_PCI_MSIX, + .ops = &pci_msi_domain_ops, + .chip = &pci_msi_ir_controller, + .handler = handle_edge_irq, + .handler_name = "edge", +}; - setup_remapped_irq(irq, irq_cfg(irq), chip); +struct irq_domain *arch_create_msi_irq_domain(struct irq_domain *parent) +{ + return pci_msi_create_irq_domain(NULL, &pci_msi_ir_domain_info, parent); +} +#endif - irq_set_chip_and_handler_name(irq, chip, handle_edge_irq, "edge"); +#ifdef CONFIG_DMAR_TABLE +static void dmar_msi_write_msg(struct irq_data *data, struct msi_msg *msg) +{ + dmar_msi_write(data->irq, msg); +} - dev_dbg(&dev->dev, "irq %d for MSI/MSI-X\n", irq); +static struct irq_chip dmar_msi_controller = { + .name = "DMAR-MSI", + .irq_unmask = dmar_msi_unmask, + .irq_mask = dmar_msi_mask, + .irq_ack = irq_chip_ack_parent, + .irq_set_affinity = msi_domain_set_affinity, + .irq_retrigger = irq_chip_retrigger_hierarchy, + .irq_compose_msi_msg = irq_msi_compose_msg, + .irq_write_msi_msg = dmar_msi_write_msg, + .flags = IRQCHIP_SKIP_SET_WAKE, +}; - return 0; +static irq_hw_number_t dmar_msi_get_hwirq(struct msi_domain_info *info, + msi_alloc_info_t *arg) +{ + return arg->dmar_id; } -int native_setup_msi_irqs(struct pci_dev *dev, int nvec, int type) +static int dmar_msi_init(struct irq_domain *domain, + struct msi_domain_info *info, unsigned int virq, + irq_hw_number_t hwirq, msi_alloc_info_t *arg) { - struct msi_desc *msidesc; - unsigned int irq; - int node, ret; + irq_domain_set_info(domain, virq, arg->dmar_id, info->chip, NULL, + handle_edge_irq, arg->dmar_data, "edge"); - /* Multiple MSI vectors only supported with interrupt remapping */ - if (type == PCI_CAP_ID_MSI && nvec > 1) - return 1; + return 0; +} - node = dev_to_node(&dev->dev); +static struct msi_domain_ops dmar_msi_domain_ops = { + .get_hwirq = dmar_msi_get_hwirq, + .msi_init = dmar_msi_init, +}; - list_for_each_entry(msidesc, &dev->msi_list, list) { - irq = irq_alloc_hwirq(node); - if (!irq) - return -ENOSPC; +static struct msi_domain_info dmar_msi_domain_info = { + .ops = &dmar_msi_domain_ops, + .chip = &dmar_msi_controller, +}; - ret = setup_msi_irq(dev, msidesc, irq, 0); - if (ret < 0) { - irq_free_hwirq(irq); - return ret; - } +static struct irq_domain *dmar_get_irq_domain(void) +{ + static struct irq_domain *dmar_domain; + static DEFINE_MUTEX(dmar_lock); - } - return 0; -} + mutex_lock(&dmar_lock); + if (dmar_domain == NULL) + dmar_domain = msi_create_irq_domain(NULL, &dmar_msi_domain_info, + x86_vector_domain); + mutex_unlock(&dmar_lock); -void native_teardown_msi_irq(unsigned int irq) -{ - irq_free_hwirq(irq); + return dmar_domain; } -#ifdef CONFIG_DMAR_TABLE -static int -dmar_msi_set_affinity(struct irq_data *data, const struct cpumask *mask, - bool force) +int dmar_alloc_hwirq(int id, int node, void *arg) { - struct irq_cfg *cfg = irqd_cfg(data); - unsigned int dest, irq = data->irq; - struct msi_msg msg; - int ret; - - ret = apic_set_affinity(data, mask, &dest); - if (ret) - return ret; + struct irq_domain *domain = dmar_get_irq_domain(); + struct irq_alloc_info info; - dmar_msi_read(irq, &msg); + if (!domain) + return -1; - msg.data &= ~MSI_DATA_VECTOR_MASK; - msg.data |= MSI_DATA_VECTOR(cfg->vector); - msg.address_lo &= ~MSI_ADDR_DEST_ID_MASK; - msg.address_lo |= MSI_ADDR_DEST_ID(dest); - msg.address_hi = MSI_ADDR_BASE_HI | MSI_ADDR_EXT_DEST_ID(dest); + init_irq_alloc_info(&info, NULL); + info.type = X86_IRQ_ALLOC_TYPE_DMAR; + info.dmar_id = id; + info.dmar_data = arg; - dmar_msi_write(irq, &msg); - - return IRQ_SET_MASK_OK_NOCOPY; + return irq_domain_alloc_irqs(domain, 1, node, &info); } -static struct irq_chip dmar_msi_type = { - .name = "DMAR_MSI", - .irq_unmask = dmar_msi_unmask, - .irq_mask = dmar_msi_mask, - .irq_ack = apic_ack_edge, - .irq_set_affinity = dmar_msi_set_affinity, - .irq_retrigger = apic_retrigger_irq, - .flags = IRQCHIP_SKIP_SET_WAKE, -}; - -int arch_setup_dmar_msi(unsigned int irq) +void dmar_free_hwirq(int irq) { - int ret; - struct msi_msg msg; - - ret = msi_compose_msg(NULL, irq, &msg, -1); - if (ret < 0) - return ret; - dmar_msi_write(irq, &msg); - irq_set_chip_and_handler_name(irq, &dmar_msi_type, handle_edge_irq, - "edge"); - return 0; + irq_domain_free_irqs(irq, 1); } #endif @@ -231,56 +255,103 @@ int arch_setup_dmar_msi(unsigned int irq) * MSI message composition */ #ifdef CONFIG_HPET_TIMER +static inline int hpet_dev_id(struct irq_domain *domain) +{ + struct msi_domain_info *info = msi_get_domain_info(domain); + + return (int)(long)info->data; +} -static int hpet_msi_set_affinity(struct irq_data *data, - const struct cpumask *mask, bool force) +static void hpet_msi_write_msg(struct irq_data *data, struct msi_msg *msg) { - struct irq_cfg *cfg = irqd_cfg(data); - struct msi_msg msg; - unsigned int dest; - int ret; + hpet_msi_write(data->handler_data, msg); +} - ret = apic_set_affinity(data, mask, &dest); - if (ret) - return ret; +static struct irq_chip hpet_msi_controller = { + .name = "HPET-MSI", + .irq_unmask = hpet_msi_unmask, + .irq_mask = hpet_msi_mask, + .irq_ack = irq_chip_ack_parent, + .irq_set_affinity = msi_domain_set_affinity, + .irq_retrigger = irq_chip_retrigger_hierarchy, + .irq_compose_msi_msg = irq_msi_compose_msg, + .irq_write_msi_msg = hpet_msi_write_msg, + .flags = IRQCHIP_SKIP_SET_WAKE, +}; - hpet_msi_read(data->handler_data, &msg); +static irq_hw_number_t hpet_msi_get_hwirq(struct msi_domain_info *info, + msi_alloc_info_t *arg) +{ + return arg->hpet_index; +} - msg.data &= ~MSI_DATA_VECTOR_MASK; - msg.data |= MSI_DATA_VECTOR(cfg->vector); - msg.address_lo &= ~MSI_ADDR_DEST_ID_MASK; - msg.address_lo |= MSI_ADDR_DEST_ID(dest); +static int hpet_msi_init(struct irq_domain *domain, + struct msi_domain_info *info, unsigned int virq, + irq_hw_number_t hwirq, msi_alloc_info_t *arg) +{ + irq_set_status_flags(virq, IRQ_MOVE_PCNTXT); + irq_domain_set_info(domain, virq, arg->hpet_index, info->chip, NULL, + handle_edge_irq, arg->hpet_data, "edge"); - hpet_msi_write(data->handler_data, &msg); + return 0; +} - return IRQ_SET_MASK_OK_NOCOPY; +static void hpet_msi_free(struct irq_domain *domain, + struct msi_domain_info *info, unsigned int virq) +{ + irq_clear_status_flags(virq, IRQ_MOVE_PCNTXT); } -static struct irq_chip hpet_msi_type = { - .name = "HPET_MSI", - .irq_unmask = hpet_msi_unmask, - .irq_mask = hpet_msi_mask, - .irq_ack = apic_ack_edge, - .irq_set_affinity = hpet_msi_set_affinity, - .irq_retrigger = apic_retrigger_irq, - .flags = IRQCHIP_SKIP_SET_WAKE, +static struct msi_domain_ops hpet_msi_domain_ops = { + .get_hwirq = hpet_msi_get_hwirq, + .msi_init = hpet_msi_init, + .msi_free = hpet_msi_free, +}; + +static struct msi_domain_info hpet_msi_domain_info = { + .ops = &hpet_msi_domain_ops, + .chip = &hpet_msi_controller, }; -int default_setup_hpet_msi(unsigned int irq, unsigned int id) +struct irq_domain *hpet_create_irq_domain(int hpet_id) { - struct irq_chip *chip = &hpet_msi_type; - struct msi_msg msg; - int ret; + struct irq_domain *parent; + struct irq_alloc_info info; + struct msi_domain_info *domain_info; + + if (x86_vector_domain == NULL) + return NULL; + + domain_info = kzalloc(sizeof(*domain_info), GFP_KERNEL); + if (!domain_info) + return NULL; + + *domain_info = hpet_msi_domain_info; + domain_info->data = (void *)(long)hpet_id; + + init_irq_alloc_info(&info, NULL); + info.type = X86_IRQ_ALLOC_TYPE_HPET; + info.hpet_id = hpet_id; + parent = irq_remapping_get_ir_irq_domain(&info); + if (parent == NULL) + parent = x86_vector_domain; + else + hpet_msi_controller.name = "IR-HPET-MSI"; + + return msi_create_irq_domain(NULL, domain_info, parent); +} - ret = msi_compose_msg(NULL, irq, &msg, id); - if (ret < 0) - return ret; +int hpet_assign_irq(struct irq_domain *domain, struct hpet_dev *dev, + int dev_num) +{ + struct irq_alloc_info info; - hpet_msi_write(irq_get_handler_data(irq), &msg); - irq_set_status_flags(irq, IRQ_MOVE_PCNTXT); - setup_remapped_irq(irq, irq_cfg(irq), chip); + init_irq_alloc_info(&info, NULL); + info.type = X86_IRQ_ALLOC_TYPE_HPET; + info.hpet_data = dev; + info.hpet_id = hpet_dev_id(domain); + info.hpet_index = dev_num; - irq_set_chip_and_handler_name(irq, chip, handle_edge_irq, "edge"); - return 0; + return irq_domain_alloc_irqs(domain, 1, NUMA_NO_NODE, &info); } #endif diff --git a/arch/x86/kernel/apic/vector.c b/arch/x86/kernel/apic/vector.c index 6cedd79..28eba2d 100644 --- a/arch/x86/kernel/apic/vector.c +++ b/arch/x86/kernel/apic/vector.c @@ -3,6 +3,8 @@ * * Copyright (C) 1997, 1998, 1999, 2000, 2009 Ingo Molnar, Hajnalka Szabo * Moved from arch/x86/kernel/apic/io_apic.c. + * Jiang Liu <jiang.liu@linux.intel.com> + * Enable support of hierarchical irqdomains * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as @@ -11,15 +13,28 @@ #include <linux/interrupt.h> #include <linux/init.h> #include <linux/compiler.h> -#include <linux/irqdomain.h> #include <linux/slab.h> +#include <asm/irqdomain.h> #include <asm/hw_irq.h> #include <asm/apic.h> #include <asm/i8259.h> #include <asm/desc.h> #include <asm/irq_remapping.h> +struct apic_chip_data { + struct irq_cfg cfg; + cpumask_var_t domain; + cpumask_var_t old_domain; + u8 move_in_progress : 1; +}; + +struct irq_domain *x86_vector_domain; static DEFINE_RAW_SPINLOCK(vector_lock); +static cpumask_var_t vector_cpumask; +static struct irq_chip lapic_controller; +#ifdef CONFIG_X86_IO_APIC +static struct apic_chip_data *legacy_irq_data[NR_IRQS_LEGACY]; +#endif void lock_vector_lock(void) { @@ -34,71 +49,59 @@ void unlock_vector_lock(void) raw_spin_unlock(&vector_lock); } -struct irq_cfg *irq_cfg(unsigned int irq) +static struct apic_chip_data *apic_chip_data(struct irq_data *irq_data) { - return irq_get_chip_data(irq); + if (!irq_data) + return NULL; + + while (irq_data->parent_data) + irq_data = irq_data->parent_data; + + return irq_data->chip_data; } struct irq_cfg *irqd_cfg(struct irq_data *irq_data) { - return irq_data->chip_data; + struct apic_chip_data *data = apic_chip_data(irq_data); + + return data ? &data->cfg : NULL; } -static struct irq_cfg *alloc_irq_cfg(unsigned int irq, int node) +struct irq_cfg *irq_cfg(unsigned int irq) { - struct irq_cfg *cfg; + return irqd_cfg(irq_get_irq_data(irq)); +} - cfg = kzalloc_node(sizeof(*cfg), GFP_KERNEL, node); - if (!cfg) +static struct apic_chip_data *alloc_apic_chip_data(int node) +{ + struct apic_chip_data *data; + + data = kzalloc_node(sizeof(*data), GFP_KERNEL, node); + if (!data) return NULL; - if (!zalloc_cpumask_var_node(&cfg->domain, GFP_KERNEL, node)) - goto out_cfg; - if (!zalloc_cpumask_var_node(&cfg->old_domain, GFP_KERNEL, node)) + if (!zalloc_cpumask_var_node(&data->domain, GFP_KERNEL, node)) + goto out_data; + if (!zalloc_cpumask_var_node(&data->old_domain, GFP_KERNEL, node)) goto out_domain; -#ifdef CONFIG_X86_IO_APIC - INIT_LIST_HEAD(&cfg->irq_2_pin); -#endif - return cfg; + return data; out_domain: - free_cpumask_var(cfg->domain); -out_cfg: - kfree(cfg); + free_cpumask_var(data->domain); +out_data: + kfree(data); return NULL; } -struct irq_cfg *alloc_irq_and_cfg_at(unsigned int at, int node) +static void free_apic_chip_data(struct apic_chip_data *data) { - int res = irq_alloc_desc_at(at, node); - struct irq_cfg *cfg; - - if (res < 0) { - if (res != -EEXIST) - return NULL; - cfg = irq_cfg(at); - if (cfg) - return cfg; + if (data) { + free_cpumask_var(data->domain); + free_cpumask_var(data->old_domain); + kfree(data); } - - cfg = alloc_irq_cfg(at, node); - if (cfg) - irq_set_chip_data(at, cfg); - else - irq_free_desc(at); - return cfg; -} - -static void free_irq_cfg(unsigned int at, struct irq_cfg *cfg) -{ - if (!cfg) - return; - irq_set_chip_data(at, NULL); - free_cpumask_var(cfg->domain); - free_cpumask_var(cfg->old_domain); - kfree(cfg); } -static int -__assign_irq_vector(int irq, struct irq_cfg *cfg, const struct cpumask *mask) +static int __assign_irq_vector(int irq, struct apic_chip_data *d, + const struct cpumask *mask) { /* * NOTE! The local APIC isn't very good at handling @@ -114,36 +117,33 @@ __assign_irq_vector(int irq, struct irq_cfg *cfg, const struct cpumask *mask) static int current_vector = FIRST_EXTERNAL_VECTOR + VECTOR_OFFSET_START; static int current_offset = VECTOR_OFFSET_START % 16; int cpu, err; - cpumask_var_t tmp_mask; - if (cfg->move_in_progress) + if (d->move_in_progress) return -EBUSY; - if (!alloc_cpumask_var(&tmp_mask, GFP_ATOMIC)) - return -ENOMEM; - /* Only try and allocate irqs on cpus that are present */ err = -ENOSPC; - cpumask_clear(cfg->old_domain); + cpumask_clear(d->old_domain); cpu = cpumask_first_and(mask, cpu_online_mask); while (cpu < nr_cpu_ids) { int new_cpu, vector, offset; - apic->vector_allocation_domain(cpu, tmp_mask, mask); + apic->vector_allocation_domain(cpu, vector_cpumask, mask); - if (cpumask_subset(tmp_mask, cfg->domain)) { + if (cpumask_subset(vector_cpumask, d->domain)) { err = 0; - if (cpumask_equal(tmp_mask, cfg->domain)) + if (cpumask_equal(vector_cpumask, d->domain)) break; /* * New cpumask using the vector is a proper subset of * the current in use mask. So cleanup the vector * allocation for the members that are not used anymore. */ - cpumask_andnot(cfg->old_domain, cfg->domain, tmp_mask); - cfg->move_in_progress = - cpumask_intersects(cfg->old_domain, cpu_online_mask); - cpumask_and(cfg->domain, cfg->domain, tmp_mask); + cpumask_andnot(d->old_domain, d->domain, + vector_cpumask); + d->move_in_progress = + cpumask_intersects(d->old_domain, cpu_online_mask); + cpumask_and(d->domain, d->domain, vector_cpumask); break; } @@ -157,16 +157,18 @@ next: } if (unlikely(current_vector == vector)) { - cpumask_or(cfg->old_domain, cfg->old_domain, tmp_mask); - cpumask_andnot(tmp_mask, mask, cfg->old_domain); - cpu = cpumask_first_and(tmp_mask, cpu_online_mask); + cpumask_or(d->old_domain, d->old_domain, + vector_cpumask); + cpumask_andnot(vector_cpumask, mask, d->old_domain); + cpu = cpumask_first_and(vector_cpumask, + cpu_online_mask); continue; } if (test_bit(vector, used_vectors)) goto next; - for_each_cpu_and(new_cpu, tmp_mask, cpu_online_mask) { + for_each_cpu_and(new_cpu, vector_cpumask, cpu_online_mask) { if (per_cpu(vector_irq, new_cpu)[vector] > VECTOR_UNDEFINED) goto next; @@ -174,55 +176,73 @@ next: /* Found one! */ current_vector = vector; current_offset = offset; - if (cfg->vector) { - cpumask_copy(cfg->old_domain, cfg->domain); - cfg->move_in_progress = - cpumask_intersects(cfg->old_domain, cpu_online_mask); + if (d->cfg.vector) { + cpumask_copy(d->old_domain, d->domain); + d->move_in_progress = + cpumask_intersects(d->old_domain, cpu_online_mask); } - for_each_cpu_and(new_cpu, tmp_mask, cpu_online_mask) + for_each_cpu_and(new_cpu, vector_cpumask, cpu_online_mask) per_cpu(vector_irq, new_cpu)[vector] = irq; - cfg->vector = vector; - cpumask_copy(cfg->domain, tmp_mask); + d->cfg.vector = vector; + cpumask_copy(d->domain, vector_cpumask); err = 0; break; } - free_cpumask_var(tmp_mask); + + if (!err) { + /* cache destination APIC IDs into cfg->dest_apicid */ + err = apic->cpu_mask_to_apicid_and(mask, d->domain, + &d->cfg.dest_apicid); + } return err; } -int assign_irq_vector(int irq, struct irq_cfg *cfg, const struct cpumask *mask) +static int assign_irq_vector(int irq, struct apic_chip_data *data, + const struct cpumask *mask) { int err; unsigned long flags; raw_spin_lock_irqsave(&vector_lock, flags); - err = __assign_irq_vector(irq, cfg, mask); + err = __assign_irq_vector(irq, data, mask); raw_spin_unlock_irqrestore(&vector_lock, flags); return err; } -void clear_irq_vector(int irq, struct irq_cfg *cfg) +static int assign_irq_vector_policy(int irq, int node, + struct apic_chip_data *data, + struct irq_alloc_info *info) +{ + if (info && info->mask) + return assign_irq_vector(irq, data, info->mask); + if (node != NUMA_NO_NODE && + assign_irq_vector(irq, data, cpumask_of_node(node)) == 0) + return 0; + return assign_irq_vector(irq, data, apic->target_cpus()); +} + +static void clear_irq_vector(int irq, struct apic_chip_data *data) { int cpu, vector; unsigned long flags; raw_spin_lock_irqsave(&vector_lock, flags); - BUG_ON(!cfg->vector); + BUG_ON(!data->cfg.vector); - vector = cfg->vector; - for_each_cpu_and(cpu, cfg->domain, cpu_online_mask) + vector = data->cfg.vector; + for_each_cpu_and(cpu, data->domain, cpu_online_mask) per_cpu(vector_irq, cpu)[vector] = VECTOR_UNDEFINED; - cfg->vector = 0; - cpumask_clear(cfg->domain); + data->cfg.vector = 0; + cpumask_clear(data->domain); - if (likely(!cfg->move_in_progress)) { + if (likely(!data->move_in_progress)) { raw_spin_unlock_irqrestore(&vector_lock, flags); return; } - for_each_cpu_and(cpu, cfg->old_domain, cpu_online_mask) { + for_each_cpu_and(cpu, data->old_domain, cpu_online_mask) { for (vector = FIRST_EXTERNAL_VECTOR; vector < NR_VECTORS; vector++) { if (per_cpu(vector_irq, cpu)[vector] != irq) @@ -231,10 +251,95 @@ void clear_irq_vector(int irq, struct irq_cfg *cfg) break; } } - cfg->move_in_progress = 0; + data->move_in_progress = 0; raw_spin_unlock_irqrestore(&vector_lock, flags); } +void init_irq_alloc_info(struct irq_alloc_info *info, + const struct cpumask *mask) +{ + memset(info, 0, sizeof(*info)); + info->mask = mask; +} + +void copy_irq_alloc_info(struct irq_alloc_info *dst, struct irq_alloc_info *src) +{ + if (src) + *dst = *src; + else + memset(dst, 0, sizeof(*dst)); +} + +static void x86_vector_free_irqs(struct irq_domain *domain, + unsigned int virq, unsigned int nr_irqs) +{ + struct irq_data *irq_data; + int i; + + for (i = 0; i < nr_irqs; i++) { + irq_data = irq_domain_get_irq_data(x86_vector_domain, virq + i); + if (irq_data && irq_data->chip_data) { + clear_irq_vector(virq + i, irq_data->chip_data); + free_apic_chip_data(irq_data->chip_data); +#ifdef CONFIG_X86_IO_APIC + if (virq + i < nr_legacy_irqs()) + legacy_irq_data[virq + i] = NULL; +#endif + irq_domain_reset_irq_data(irq_data); + } + } +} + +static int x86_vector_alloc_irqs(struct irq_domain *domain, unsigned int virq, + unsigned int nr_irqs, void *arg) +{ + struct irq_alloc_info *info = arg; + struct apic_chip_data *data; + struct irq_data *irq_data; + int i, err; + + if (disable_apic) + return -ENXIO; + + /* Currently vector allocator can't guarantee contiguous allocations */ + if ((info->flags & X86_IRQ_ALLOC_CONTIGUOUS_VECTORS) && nr_irqs > 1) + return -ENOSYS; + + for (i = 0; i < nr_irqs; i++) { + irq_data = irq_domain_get_irq_data(domain, virq + i); + BUG_ON(!irq_data); +#ifdef CONFIG_X86_IO_APIC + if (virq + i < nr_legacy_irqs() && legacy_irq_data[virq + i]) + data = legacy_irq_data[virq + i]; + else +#endif + data = alloc_apic_chip_data(irq_data->node); + if (!data) { + err = -ENOMEM; + goto error; + } + + irq_data->chip = &lapic_controller; + irq_data->chip_data = data; + irq_data->hwirq = virq + i; + err = assign_irq_vector_policy(virq, irq_data->node, data, + info); + if (err) + goto error; + } + + return 0; + +error: + x86_vector_free_irqs(domain, virq, i + 1); + return err; +} + +static const struct irq_domain_ops x86_vector_domain_ops = { + .alloc = x86_vector_alloc_irqs, + .free = x86_vector_free_irqs, +}; + int __init arch_probe_nr_irqs(void) { int nr; @@ -258,8 +363,43 @@ int __init arch_probe_nr_irqs(void) return nr_legacy_irqs(); } +#ifdef CONFIG_X86_IO_APIC +static void init_legacy_irqs(void) +{ + int i, node = cpu_to_node(0); + struct apic_chip_data *data; + + /* + * For legacy IRQ's, start with assigning irq0 to irq15 to + * ISA_IRQ_VECTOR(i) for all cpu's. + */ + for (i = 0; i < nr_legacy_irqs(); i++) { + data = legacy_irq_data[i] = alloc_apic_chip_data(node); + BUG_ON(!data); + + data->cfg.vector = ISA_IRQ_VECTOR(i); + cpumask_setall(data->domain); + irq_set_chip_data(i, data); + } +} +#else +static void init_legacy_irqs(void) { } +#endif + int __init arch_early_irq_init(void) { + init_legacy_irqs(); + + x86_vector_domain = irq_domain_add_tree(NULL, &x86_vector_domain_ops, + NULL); + BUG_ON(x86_vector_domain == NULL); + irq_set_default_host(x86_vector_domain); + + arch_init_msi_domain(x86_vector_domain); + arch_init_htirq_domain(x86_vector_domain); + + BUG_ON(!alloc_cpumask_var(&vector_cpumask, GFP_KERNEL)); + return arch_early_ioapic_init(); } @@ -267,7 +407,7 @@ static void __setup_vector_irq(int cpu) { /* Initialize vector_irq on a new cpu */ int irq, vector; - struct irq_cfg *cfg; + struct apic_chip_data *data; /* * vector_lock will make sure that we don't run into irq vector @@ -277,13 +417,13 @@ static void __setup_vector_irq(int cpu) raw_spin_lock(&vector_lock); /* Mark the inuse vectors */ for_each_active_irq(irq) { - cfg = irq_cfg(irq); - if (!cfg) + data = apic_chip_data(irq_get_irq_data(irq)); + if (!data) continue; - if (!cpumask_test_cpu(cpu, cfg->domain)) + if (!cpumask_test_cpu(cpu, data->domain)) continue; - vector = cfg->vector; + vector = data->cfg.vector; per_cpu(vector_irq, cpu)[vector] = irq; } /* Mark the free vectors */ @@ -292,8 +432,8 @@ static void __setup_vector_irq(int cpu) if (irq <= VECTOR_UNDEFINED) continue; - cfg = irq_cfg(irq); - if (!cpumask_test_cpu(cpu, cfg->domain)) + data = apic_chip_data(irq_get_irq_data(irq)); + if (!cpumask_test_cpu(cpu, data->domain)) per_cpu(vector_irq, cpu)[vector] = VECTOR_UNDEFINED; } raw_spin_unlock(&vector_lock); @@ -314,20 +454,20 @@ void setup_vector_irq(int cpu) * legacy vector to irq mapping: */ for (irq = 0; irq < nr_legacy_irqs(); irq++) - per_cpu(vector_irq, cpu)[IRQ0_VECTOR + irq] = irq; + per_cpu(vector_irq, cpu)[ISA_IRQ_VECTOR(irq)] = irq; __setup_vector_irq(cpu); } -int apic_retrigger_irq(struct irq_data *data) +static int apic_retrigger_irq(struct irq_data *irq_data) { - struct irq_cfg *cfg = irqd_cfg(data); + struct apic_chip_data *data = apic_chip_data(irq_data); unsigned long flags; int cpu; raw_spin_lock_irqsave(&vector_lock, flags); - cpu = cpumask_first_and(cfg->domain, cpu_online_mask); - apic->send_IPI_mask(cpumask_of(cpu), cfg->vector); + cpu = cpumask_first_and(data->domain, cpu_online_mask); + apic->send_IPI_mask(cpumask_of(cpu), data->cfg.vector); raw_spin_unlock_irqrestore(&vector_lock, flags); return 1; @@ -340,73 +480,76 @@ void apic_ack_edge(struct irq_data *data) ack_APIC_irq(); } -/* - * Either sets data->affinity to a valid value, and returns - * ->cpu_mask_to_apicid of that in dest_id, or returns -1 and - * leaves data->affinity untouched. - */ -int apic_set_affinity(struct irq_data *data, const struct cpumask *mask, - unsigned int *dest_id) +static int apic_set_affinity(struct irq_data *irq_data, + const struct cpumask *dest, bool force) { - struct irq_cfg *cfg = irqd_cfg(data); - unsigned int irq = data->irq; - int err; + struct apic_chip_data *data = irq_data->chip_data; + int err, irq = irq_data->irq; if (!config_enabled(CONFIG_SMP)) return -EPERM; - if (!cpumask_intersects(mask, cpu_online_mask)) + if (!cpumask_intersects(dest, cpu_online_mask)) return -EINVAL; - err = assign_irq_vector(irq, cfg, mask); - if (err) - return err; - - err = apic->cpu_mask_to_apicid_and(mask, cfg->domain, dest_id); + err = assign_irq_vector(irq, data, dest); if (err) { - if (assign_irq_vector(irq, cfg, data->affinity)) + struct irq_data *top = irq_get_irq_data(irq); + + if (assign_irq_vector(irq, data, top->affinity)) pr_err("Failed to recover vector for irq %d\n", irq); return err; } - cpumask_copy(data->affinity, mask); - - return 0; + return IRQ_SET_MASK_OK; } +static struct irq_chip lapic_controller = { + .irq_ack = apic_ack_edge, + .irq_set_affinity = apic_set_affinity, + .irq_retrigger = apic_retrigger_irq, +}; + #ifdef CONFIG_SMP -void send_cleanup_vector(struct irq_cfg *cfg) +static void __send_cleanup_vector(struct apic_chip_data *data) { cpumask_var_t cleanup_mask; if (unlikely(!alloc_cpumask_var(&cleanup_mask, GFP_ATOMIC))) { unsigned int i; - for_each_cpu_and(i, cfg->old_domain, cpu_online_mask) + for_each_cpu_and(i, data->old_domain, cpu_online_mask) apic->send_IPI_mask(cpumask_of(i), IRQ_MOVE_CLEANUP_VECTOR); } else { - cpumask_and(cleanup_mask, cfg->old_domain, cpu_online_mask); + cpumask_and(cleanup_mask, data->old_domain, cpu_online_mask); apic->send_IPI_mask(cleanup_mask, IRQ_MOVE_CLEANUP_VECTOR); free_cpumask_var(cleanup_mask); } - cfg->move_in_progress = 0; + data->move_in_progress = 0; +} + +void send_cleanup_vector(struct irq_cfg *cfg) +{ + struct apic_chip_data *data; + + data = container_of(cfg, struct apic_chip_data, cfg); + if (data->move_in_progress) + __send_cleanup_vector(data); } asmlinkage __visible void smp_irq_move_cleanup_interrupt(void) { unsigned vector, me; - ack_APIC_irq(); - irq_enter(); - exit_idle(); + entering_ack_irq(); me = smp_processor_id(); for (vector = FIRST_EXTERNAL_VECTOR; vector < NR_VECTORS; vector++) { int irq; unsigned int irr; struct irq_desc *desc; - struct irq_cfg *cfg; + struct apic_chip_data *data; irq = __this_cpu_read(vector_irq[vector]); @@ -417,8 +560,8 @@ asmlinkage __visible void smp_irq_move_cleanup_interrupt(void) if (!desc) continue; - cfg = irq_cfg(irq); - if (!cfg) + data = apic_chip_data(&desc->irq_data); + if (!data) continue; raw_spin_lock(&desc->lock); @@ -427,10 +570,11 @@ asmlinkage __visible void smp_irq_move_cleanup_interrupt(void) * Check if the irq migration is in progress. If so, we * haven't received the cleanup request yet for this irq. */ - if (cfg->move_in_progress) + if (data->move_in_progress) goto unlock; - if (vector == cfg->vector && cpumask_test_cpu(me, cfg->domain)) + if (vector == data->cfg.vector && + cpumask_test_cpu(me, data->domain)) goto unlock; irr = apic_read(APIC_IRR + (vector / 32 * 0x10)); @@ -450,20 +594,21 @@ unlock: raw_spin_unlock(&desc->lock); } - irq_exit(); + exiting_irq(); } static void __irq_complete_move(struct irq_cfg *cfg, unsigned vector) { unsigned me; + struct apic_chip_data *data; - if (likely(!cfg->move_in_progress)) + data = container_of(cfg, struct apic_chip_data, cfg); + if (likely(!data->move_in_progress)) return; me = smp_processor_id(); - - if (vector == cfg->vector && cpumask_test_cpu(me, cfg->domain)) - send_cleanup_vector(cfg); + if (vector == data->cfg.vector && cpumask_test_cpu(me, data->domain)) + __send_cleanup_vector(data); } void irq_complete_move(struct irq_cfg *cfg) @@ -475,46 +620,11 @@ void irq_force_complete_move(int irq) { struct irq_cfg *cfg = irq_cfg(irq); - if (!cfg) - return; - - __irq_complete_move(cfg, cfg->vector); + if (cfg) + __irq_complete_move(cfg, cfg->vector); } #endif -/* - * Dynamic irq allocate and deallocation. Should be replaced by irq domains! - */ -int arch_setup_hwirq(unsigned int irq, int node) -{ - struct irq_cfg *cfg; - unsigned long flags; - int ret; - - cfg = alloc_irq_cfg(irq, node); - if (!cfg) - return -ENOMEM; - - raw_spin_lock_irqsave(&vector_lock, flags); - ret = __assign_irq_vector(irq, cfg, apic->target_cpus()); - raw_spin_unlock_irqrestore(&vector_lock, flags); - - if (!ret) - irq_set_chip_data(irq, cfg); - else - free_irq_cfg(irq, cfg); - return ret; -} - -void arch_teardown_hwirq(unsigned int irq) -{ - struct irq_cfg *cfg = irq_cfg(irq); - - free_remapped_irq(irq); - clear_irq_vector(irq, cfg); - free_irq_cfg(irq, cfg); -} - static void __init print_APIC_field(int base) { int i; diff --git a/arch/x86/kernel/apic/x2apic_phys.c b/arch/x86/kernel/apic/x2apic_phys.c index 6fae733..3ffd925 100644 --- a/arch/x86/kernel/apic/x2apic_phys.c +++ b/arch/x86/kernel/apic/x2apic_phys.c @@ -21,11 +21,13 @@ early_param("x2apic_phys", set_x2apic_phys_mode); static bool x2apic_fadt_phys(void) { +#ifdef CONFIG_ACPI if ((acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) && (acpi_gbl_FADT.flags & ACPI_FADT_APIC_PHYSICAL)) { printk(KERN_DEBUG "System requires x2apic physical mode\n"); return true; } +#endif return false; } diff --git a/arch/x86/kernel/asm-offsets.c b/arch/x86/kernel/asm-offsets.c index b27f6ec..8e3d22a1 100644 --- a/arch/x86/kernel/asm-offsets.c +++ b/arch/x86/kernel/asm-offsets.c @@ -68,7 +68,9 @@ void common(void) { OFFSET(PV_IRQ_irq_disable, pv_irq_ops, irq_disable); OFFSET(PV_IRQ_irq_enable, pv_irq_ops, irq_enable); OFFSET(PV_CPU_iret, pv_cpu_ops, iret); +#ifdef CONFIG_X86_32 OFFSET(PV_CPU_irq_enable_sysexit, pv_cpu_ops, irq_enable_sysexit); +#endif OFFSET(PV_CPU_read_cr0, pv_cpu_ops, read_cr0); OFFSET(PV_MMU_read_cr2, pv_mmu_ops, read_cr2); #endif diff --git a/arch/x86/kernel/asm-offsets_64.c b/arch/x86/kernel/asm-offsets_64.c index dcaab87..d8f42f9 100644 --- a/arch/x86/kernel/asm-offsets_64.c +++ b/arch/x86/kernel/asm-offsets_64.c @@ -66,7 +66,7 @@ int main(void) DEFINE(__NR_syscall_max, sizeof(syscalls_64) - 1); DEFINE(NR_syscalls, sizeof(syscalls_64)); - DEFINE(__NR_ia32_syscall_max, sizeof(syscalls_ia32) - 1); + DEFINE(__NR_syscall_compat_max, sizeof(syscalls_ia32) - 1); DEFINE(IA32_NR_syscalls, sizeof(syscalls_ia32)); return 0; diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c index 56cae19..dd3a4ba 100644 --- a/arch/x86/kernel/cpu/amd.c +++ b/arch/x86/kernel/cpu/amd.c @@ -295,7 +295,7 @@ static int nearby_node(int apicid) * Assumption: Number of cores in each internal node is the same. * (2) AMD processors supporting compute units */ -#ifdef CONFIG_X86_HT +#ifdef CONFIG_SMP static void amd_get_topology(struct cpuinfo_x86 *c) { u32 cores_per_cu = 1; @@ -348,7 +348,7 @@ static void amd_get_topology(struct cpuinfo_x86 *c) */ static void amd_detect_cmp(struct cpuinfo_x86 *c) { -#ifdef CONFIG_X86_HT +#ifdef CONFIG_SMP unsigned bits; int cpu = smp_processor_id(); @@ -433,7 +433,7 @@ static void srat_detect_node(struct cpuinfo_x86 *c) static void early_init_amd_mc(struct cpuinfo_x86 *c) { -#ifdef CONFIG_X86_HT +#ifdef CONFIG_SMP unsigned bits, ecx; /* Multi core CPU? */ diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c index b28e526..9fc5e3d 100644 --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -491,7 +491,7 @@ static void cpu_detect_tlb(struct cpuinfo_x86 *c) void detect_ht(struct cpuinfo_x86 *c) { -#ifdef CONFIG_X86_HT +#ifdef CONFIG_SMP u32 eax, ebx, ecx, edx; int index_msb, core_bits; static bool printed; @@ -827,7 +827,7 @@ static void generic_identify(struct cpuinfo_x86 *c) if (c->cpuid_level >= 0x00000001) { c->initial_apicid = (cpuid_ebx(1) >> 24) & 0xFF; #ifdef CONFIG_X86_32 -# ifdef CONFIG_X86_HT +# ifdef CONFIG_SMP c->apicid = apic->phys_pkg_id(c->initial_apicid, 0); # else c->apicid = c->initial_apicid; @@ -1009,7 +1009,7 @@ void enable_sep_cpu(void) (unsigned long)tss + offsetofend(struct tss_struct, SYSENTER_stack), 0); - wrmsr(MSR_IA32_SYSENTER_EIP, (unsigned long)ia32_sysenter_target, 0); + wrmsr(MSR_IA32_SYSENTER_EIP, (unsigned long)entry_SYSENTER_32, 0); out: put_cpu(); @@ -1138,10 +1138,6 @@ static __init int setup_disablecpuid(char *arg) } __setup("clearcpuid=", setup_disablecpuid); -DEFINE_PER_CPU(unsigned long, kernel_stack) = - (unsigned long)&init_thread_union + THREAD_SIZE; -EXPORT_PER_CPU_SYMBOL(kernel_stack); - #ifdef CONFIG_X86_64 struct desc_ptr idt_descr = { NR_VECTORS * 16 - 1, (unsigned long) idt_table }; struct desc_ptr debug_idt_descr = { NR_VECTORS * 16 - 1, @@ -1189,10 +1185,10 @@ void syscall_init(void) * set CS/DS but only a 32bit target. LSTAR sets the 64bit rip. */ wrmsrl(MSR_STAR, ((u64)__USER32_CS)<<48 | ((u64)__KERNEL_CS)<<32); - wrmsrl(MSR_LSTAR, system_call); + wrmsrl(MSR_LSTAR, entry_SYSCALL_64); #ifdef CONFIG_IA32_EMULATION - wrmsrl(MSR_CSTAR, ia32_cstar_target); + wrmsrl(MSR_CSTAR, entry_SYSCALL_compat); /* * This only works on Intel CPUs. * On AMD CPUs these MSRs are 32-bit, CPU truncates MSR_IA32_SYSENTER_EIP. @@ -1201,7 +1197,7 @@ void syscall_init(void) */ wrmsrl_safe(MSR_IA32_SYSENTER_CS, (u64)__KERNEL_CS); wrmsrl_safe(MSR_IA32_SYSENTER_ESP, 0ULL); - wrmsrl_safe(MSR_IA32_SYSENTER_EIP, (u64)ia32_sysenter_target); + wrmsrl_safe(MSR_IA32_SYSENTER_EIP, (u64)entry_SYSENTER_compat); #else wrmsrl(MSR_CSTAR, ignore_sysret); wrmsrl_safe(MSR_IA32_SYSENTER_CS, (u64)GDT_ENTRY_INVALID_SEG); diff --git a/arch/x86/kernel/cpu/intel_cacheinfo.c b/arch/x86/kernel/cpu/intel_cacheinfo.c index edcb0e2..be4febc 100644 --- a/arch/x86/kernel/cpu/intel_cacheinfo.c +++ b/arch/x86/kernel/cpu/intel_cacheinfo.c @@ -654,7 +654,7 @@ unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c) unsigned int new_l1d = 0, new_l1i = 0; /* Cache sizes from cpuid(4) */ unsigned int new_l2 = 0, new_l3 = 0, i; /* Cache sizes from cpuid(4) */ unsigned int l2_id = 0, l3_id = 0, num_threads_sharing, index_msb; -#ifdef CONFIG_X86_HT +#ifdef CONFIG_SMP unsigned int cpu = c->cpu_index; #endif @@ -773,19 +773,19 @@ unsigned int init_intel_cacheinfo(struct cpuinfo_x86 *c) if (new_l2) { l2 = new_l2; -#ifdef CONFIG_X86_HT +#ifdef CONFIG_SMP per_cpu(cpu_llc_id, cpu) = l2_id; #endif } if (new_l3) { l3 = new_l3; -#ifdef CONFIG_X86_HT +#ifdef CONFIG_SMP per_cpu(cpu_llc_id, cpu) = l3_id; #endif } -#ifdef CONFIG_X86_HT +#ifdef CONFIG_SMP /* * If cpu_llc_id is not yet set, this means cpuid_level < 4 which in * turns means that the only possibility is SMT (as indicated in diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c index 95cf78d..df919ff 100644 --- a/arch/x86/kernel/cpu/mcheck/mce.c +++ b/arch/x86/kernel/cpu/mcheck/mce.c @@ -1053,6 +1053,7 @@ void do_machine_check(struct pt_regs *regs, long error_code) char *msg = "Unknown"; u64 recover_paddr = ~0ull; int flags = MF_ACTION_REQUIRED; + int lmce = 0; prev_state = ist_enter(regs); @@ -1080,11 +1081,20 @@ void do_machine_check(struct pt_regs *regs, long error_code) kill_it = 1; /* - * Go through all the banks in exclusion of the other CPUs. - * This way we don't report duplicated events on shared banks - * because the first one to see it will clear it. + * Check if this MCE is signaled to only this logical processor */ - order = mce_start(&no_way_out); + if (m.mcgstatus & MCG_STATUS_LMCES) + lmce = 1; + else { + /* + * Go through all the banks in exclusion of the other CPUs. + * This way we don't report duplicated events on shared banks + * because the first one to see it will clear it. + * If this is a Local MCE, then no need to perform rendezvous. + */ + order = mce_start(&no_way_out); + } + for (i = 0; i < cfg->banks; i++) { __clear_bit(i, toclear); if (!test_bit(i, valid_banks)) @@ -1161,8 +1171,18 @@ void do_machine_check(struct pt_regs *regs, long error_code) * Do most of the synchronization with other CPUs. * When there's any problem use only local no_way_out state. */ - if (mce_end(order) < 0) - no_way_out = worst >= MCE_PANIC_SEVERITY; + if (!lmce) { + if (mce_end(order) < 0) + no_way_out = worst >= MCE_PANIC_SEVERITY; + } else { + /* + * Local MCE skipped calling mce_reign() + * If we found a fatal error, we need to panic here. + */ + if (worst >= MCE_PANIC_SEVERITY && mca_cfg.tolerant < 3) + mce_panic("Machine check from unknown source", + NULL, NULL); + } /* * At insane "tolerant" levels we take no action. Otherwise @@ -1643,10 +1663,16 @@ static void __mcheck_cpu_init_vendor(struct cpuinfo_x86 *c) mce_intel_feature_init(c); mce_adjust_timer = cmci_intel_adjust_timer; break; - case X86_VENDOR_AMD: + + case X86_VENDOR_AMD: { + u32 ebx = cpuid_ebx(0x80000007); + mce_amd_feature_init(c); - mce_flags.overflow_recov = cpuid_ebx(0x80000007) & 0x1; + mce_flags.overflow_recov = !!(ebx & BIT(0)); + mce_flags.succor = !!(ebx & BIT(1)); break; + } + default: break; } @@ -1982,6 +2008,7 @@ void mce_disable_bank(int bank) /* * mce=off Disables machine check * mce=no_cmci Disables CMCI + * mce=no_lmce Disables LMCE * mce=dont_log_ce Clears corrected events silently, no log created for CEs. * mce=ignore_ce Disables polling and CMCI, corrected events are not cleared. * mce=TOLERANCELEVEL[,monarchtimeout] (number, see above) @@ -2005,6 +2032,8 @@ static int __init mcheck_enable(char *str) cfg->disabled = true; else if (!strcmp(str, "no_cmci")) cfg->cmci_disabled = true; + else if (!strcmp(str, "no_lmce")) + cfg->lmce_disabled = true; else if (!strcmp(str, "dont_log_ce")) cfg->dont_log_ce = true; else if (!strcmp(str, "ignore_ce")) @@ -2014,11 +2043,8 @@ static int __init mcheck_enable(char *str) else if (!strcmp(str, "bios_cmci_threshold")) cfg->bios_cmci_threshold = true; else if (isdigit(str[0])) { - get_option(&str, &(cfg->tolerant)); - if (*str == ',') { - ++str; + if (get_option(&str, &cfg->tolerant) == 2) get_option(&str, &(cfg->monarch_timeout)); - } } else { pr_info("mce argument %s ignored. Please use /sys\n", str); return 0; diff --git a/arch/x86/kernel/cpu/mcheck/mce_amd.c b/arch/x86/kernel/cpu/mcheck/mce_amd.c index 55ad9b3..e99b150 100644 --- a/arch/x86/kernel/cpu/mcheck/mce_amd.c +++ b/arch/x86/kernel/cpu/mcheck/mce_amd.c @@ -1,19 +1,13 @@ /* - * (c) 2005-2012 Advanced Micro Devices, Inc. + * (c) 2005-2015 Advanced Micro Devices, Inc. * Your use of this code is subject to the terms and conditions of the * GNU general public license version 2. See "COPYING" or * http://www.gnu.org/licenses/gpl.html * * Written by Jacob Shin - AMD, Inc. - * * Maintained by: Borislav Petkov <bp@alien8.de> * - * April 2006 - * - added support for AMD Family 0x10 processors - * May 2012 - * - major scrubbing - * - * All MC4_MISCi registers are shared between multi-cores + * All MC4_MISCi registers are shared between cores on a node. */ #include <linux/interrupt.h> #include <linux/notifier.h> @@ -32,6 +26,7 @@ #include <asm/idle.h> #include <asm/mce.h> #include <asm/msr.h> +#include <asm/trace/irq_vectors.h> #define NR_BLOCKS 9 #define THRESHOLD_MAX 0xFFF @@ -47,6 +42,13 @@ #define MASK_BLKPTR_LO 0xFF000000 #define MCG_XBLK_ADDR 0xC0000400 +/* Deferred error settings */ +#define MSR_CU_DEF_ERR 0xC0000410 +#define MASK_DEF_LVTOFF 0x000000F0 +#define MASK_DEF_INT_TYPE 0x00000006 +#define DEF_LVT_OFF 0x2 +#define DEF_INT_TYPE_APIC 0x2 + static const char * const th_names[] = { "load_store", "insn_fetch", @@ -60,6 +62,13 @@ static DEFINE_PER_CPU(struct threshold_bank **, threshold_banks); static DEFINE_PER_CPU(unsigned char, bank_map); /* see which banks are on */ static void amd_threshold_interrupt(void); +static void amd_deferred_error_interrupt(void); + +static void default_deferred_error_interrupt(void) +{ + pr_err("Unexpected deferred interrupt at vector %x\n", DEFERRED_ERROR_VECTOR); +} +void (*deferred_error_int_vector)(void) = default_deferred_error_interrupt; /* * CPU Initialization @@ -196,7 +205,7 @@ static void mce_threshold_block_init(struct threshold_block *b, int offset) threshold_restart_bank(&tr); }; -static int setup_APIC_mce(int reserved, int new) +static int setup_APIC_mce_threshold(int reserved, int new) { if (reserved < 0 && !setup_APIC_eilvt(new, THRESHOLD_APIC_VECTOR, APIC_EILVT_MSG_FIX, 0)) @@ -205,6 +214,39 @@ static int setup_APIC_mce(int reserved, int new) return reserved; } +static int setup_APIC_deferred_error(int reserved, int new) +{ + if (reserved < 0 && !setup_APIC_eilvt(new, DEFERRED_ERROR_VECTOR, + APIC_EILVT_MSG_FIX, 0)) + return new; + + return reserved; +} + +static void deferred_error_interrupt_enable(struct cpuinfo_x86 *c) +{ + u32 low = 0, high = 0; + int def_offset = -1, def_new; + + if (rdmsr_safe(MSR_CU_DEF_ERR, &low, &high)) + return; + + def_new = (low & MASK_DEF_LVTOFF) >> 4; + if (!(low & MASK_DEF_LVTOFF)) { + pr_err(FW_BUG "Your BIOS is not setting up LVT offset 0x2 for deferred error IRQs correctly.\n"); + def_new = DEF_LVT_OFF; + low = (low & ~MASK_DEF_LVTOFF) | (DEF_LVT_OFF << 4); + } + + def_offset = setup_APIC_deferred_error(def_offset, def_new); + if ((def_offset == def_new) && + (deferred_error_int_vector != amd_deferred_error_interrupt)) + deferred_error_int_vector = amd_deferred_error_interrupt; + + low = (low & ~MASK_DEF_INT_TYPE) | DEF_INT_TYPE_APIC; + wrmsr(MSR_CU_DEF_ERR, low, high); +} + /* cpu init entry point, called from mce.c with preempt off */ void mce_amd_feature_init(struct cpuinfo_x86 *c) { @@ -252,7 +294,7 @@ void mce_amd_feature_init(struct cpuinfo_x86 *c) b.interrupt_enable = 1; new = (high & MASK_LVTOFF_HI) >> 20; - offset = setup_APIC_mce(offset, new); + offset = setup_APIC_mce_threshold(offset, new); if ((offset == new) && (mce_threshold_vector != amd_threshold_interrupt)) @@ -262,6 +304,73 @@ init: mce_threshold_block_init(&b, offset); } } + + if (mce_flags.succor) + deferred_error_interrupt_enable(c); +} + +static void __log_error(unsigned int bank, bool threshold_err, u64 misc) +{ + struct mce m; + u64 status; + + rdmsrl(MSR_IA32_MCx_STATUS(bank), status); + if (!(status & MCI_STATUS_VAL)) + return; + + mce_setup(&m); + + m.status = status; + m.bank = bank; + + if (threshold_err) + m.misc = misc; + + if (m.status & MCI_STATUS_ADDRV) + rdmsrl(MSR_IA32_MCx_ADDR(bank), m.addr); + + mce_log(&m); + wrmsrl(MSR_IA32_MCx_STATUS(bank), 0); +} + +static inline void __smp_deferred_error_interrupt(void) +{ + inc_irq_stat(irq_deferred_error_count); + deferred_error_int_vector(); +} + +asmlinkage __visible void smp_deferred_error_interrupt(void) +{ + entering_irq(); + __smp_deferred_error_interrupt(); + exiting_ack_irq(); +} + +asmlinkage __visible void smp_trace_deferred_error_interrupt(void) +{ + entering_irq(); + trace_deferred_error_apic_entry(DEFERRED_ERROR_VECTOR); + __smp_deferred_error_interrupt(); + trace_deferred_error_apic_exit(DEFERRED_ERROR_VECTOR); + exiting_ack_irq(); +} + +/* APIC interrupt handler for deferred errors */ +static void amd_deferred_error_interrupt(void) +{ + u64 status; + unsigned int bank; + + for (bank = 0; bank < mca_cfg.banks; ++bank) { + rdmsrl(MSR_IA32_MCx_STATUS(bank), status); + + if (!(status & MCI_STATUS_VAL) || + !(status & MCI_STATUS_DEFERRED)) + continue; + + __log_error(bank, false, 0); + break; + } } /* @@ -273,12 +382,12 @@ init: * the interrupt goes off when error_count reaches threshold_limit. * the handler will simply log mcelog w/ software defined bank number. */ + static void amd_threshold_interrupt(void) { u32 low = 0, high = 0, address = 0; int cpu = smp_processor_id(); unsigned int bank, block; - struct mce m; /* assume first bank caused it */ for (bank = 0; bank < mca_cfg.banks; ++bank) { @@ -321,15 +430,7 @@ static void amd_threshold_interrupt(void) return; log: - mce_setup(&m); - rdmsrl(MSR_IA32_MCx_STATUS(bank), m.status); - if (!(m.status & MCI_STATUS_VAL)) - return; - m.misc = ((u64)high << 32) | low; - m.bank = bank; - mce_log(&m); - - wrmsrl(MSR_IA32_MCx_STATUS(bank), 0); + __log_error(bank, true, ((u64)high << 32) | low); } /* diff --git a/arch/x86/kernel/cpu/mcheck/mce_intel.c b/arch/x86/kernel/cpu/mcheck/mce_intel.c index b4a41cf..844f56c 100644 --- a/arch/x86/kernel/cpu/mcheck/mce_intel.c +++ b/arch/x86/kernel/cpu/mcheck/mce_intel.c @@ -91,6 +91,36 @@ static int cmci_supported(int *banks) return !!(cap & MCG_CMCI_P); } +static bool lmce_supported(void) +{ + u64 tmp; + + if (mca_cfg.lmce_disabled) + return false; + + rdmsrl(MSR_IA32_MCG_CAP, tmp); + + /* + * LMCE depends on recovery support in the processor. Hence both + * MCG_SER_P and MCG_LMCE_P should be present in MCG_CAP. + */ + if ((tmp & (MCG_SER_P | MCG_LMCE_P)) != + (MCG_SER_P | MCG_LMCE_P)) + return false; + + /* + * BIOS should indicate support for LMCE by setting bit 20 in + * IA32_FEATURE_CONTROL without which touching MCG_EXT_CTL will + * generate a #GP fault. + */ + rdmsrl(MSR_IA32_FEATURE_CONTROL, tmp); + if ((tmp & (FEATURE_CONTROL_LOCKED | FEATURE_CONTROL_LMCE)) == + (FEATURE_CONTROL_LOCKED | FEATURE_CONTROL_LMCE)) + return true; + + return false; +} + bool mce_intel_cmci_poll(void) { if (__this_cpu_read(cmci_storm_state) == CMCI_STORM_NONE) @@ -405,8 +435,22 @@ static void intel_init_cmci(void) cmci_recheck(); } +void intel_init_lmce(void) +{ + u64 val; + + if (!lmce_supported()) + return; + + rdmsrl(MSR_IA32_MCG_EXT_CTL, val); + + if (!(val & MCG_EXT_CTL_LMCE_EN)) + wrmsrl(MSR_IA32_MCG_EXT_CTL, val | MCG_EXT_CTL_LMCE_EN); +} + void mce_intel_feature_init(struct cpuinfo_x86 *c) { intel_init_thermal(c); intel_init_cmci(); + intel_init_lmce(); } diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c index 939155f..aad4bd8 100644 --- a/arch/x86/kernel/cpu/mshyperv.c +++ b/arch/x86/kernel/cpu/mshyperv.c @@ -39,14 +39,12 @@ void hyperv_vector_handler(struct pt_regs *regs) { struct pt_regs *old_regs = set_irq_regs(regs); - irq_enter(); - exit_idle(); - + entering_irq(); inc_irq_stat(irq_hv_callback_count); if (vmbus_handler) vmbus_handler(); - irq_exit(); + exiting_irq(); set_irq_regs(old_regs); } diff --git a/arch/x86/kernel/cpu/mtrr/cleanup.c b/arch/x86/kernel/cpu/mtrr/cleanup.c index 5f90b85..70d7c93 100644 --- a/arch/x86/kernel/cpu/mtrr/cleanup.c +++ b/arch/x86/kernel/cpu/mtrr/cleanup.c @@ -98,7 +98,8 @@ x86_get_mtrr_mem_range(struct range *range, int nr_range, continue; base = range_state[i].base_pfn; if (base < (1<<(20-PAGE_SHIFT)) && mtrr_state.have_fixed && - (mtrr_state.enabled & 1)) { + (mtrr_state.enabled & MTRR_STATE_MTRR_ENABLED) && + (mtrr_state.enabled & MTRR_STATE_MTRR_FIXED_ENABLED)) { /* Var MTRR contains UC entry below 1M? Skip it: */ printk(BIOS_BUG_MSG, i); if (base + size <= (1<<(20-PAGE_SHIFT))) diff --git a/arch/x86/kernel/cpu/mtrr/generic.c b/arch/x86/kernel/cpu/mtrr/generic.c index 7d74f7b..3b533cf 100644 --- a/arch/x86/kernel/cpu/mtrr/generic.c +++ b/arch/x86/kernel/cpu/mtrr/generic.c @@ -102,59 +102,76 @@ static int check_type_overlap(u8 *prev, u8 *curr) return 0; } -/* - * Error/Semi-error returns: - * 0xFF - when MTRR is not enabled - * *repeat == 1 implies [start:end] spanned across MTRR range and type returned - * corresponds only to [start:*partial_end]. - * Caller has to lookup again for [*partial_end:end]. +/** + * mtrr_type_lookup_fixed - look up memory type in MTRR fixed entries + * + * Return the MTRR fixed memory type of 'start'. + * + * MTRR fixed entries are divided into the following ways: + * 0x00000 - 0x7FFFF : This range is divided into eight 64KB sub-ranges + * 0x80000 - 0xBFFFF : This range is divided into sixteen 16KB sub-ranges + * 0xC0000 - 0xFFFFF : This range is divided into sixty-four 4KB sub-ranges + * + * Return Values: + * MTRR_TYPE_(type) - Matched memory type + * MTRR_TYPE_INVALID - Unmatched + */ +static u8 mtrr_type_lookup_fixed(u64 start, u64 end) +{ + int idx; + + if (start >= 0x100000) + return MTRR_TYPE_INVALID; + + /* 0x0 - 0x7FFFF */ + if (start < 0x80000) { + idx = 0; + idx += (start >> 16); + return mtrr_state.fixed_ranges[idx]; + /* 0x80000 - 0xBFFFF */ + } else if (start < 0xC0000) { + idx = 1 * 8; + idx += ((start - 0x80000) >> 14); + return mtrr_state.fixed_ranges[idx]; + } + + /* 0xC0000 - 0xFFFFF */ + idx = 3 * 8; + idx += ((start - 0xC0000) >> 12); + return mtrr_state.fixed_ranges[idx]; +} + +/** + * mtrr_type_lookup_variable - look up memory type in MTRR variable entries + * + * Return Value: + * MTRR_TYPE_(type) - Matched memory type or default memory type (unmatched) + * + * Output Arguments: + * repeat - Set to 1 when [start:end] spanned across MTRR range and type + * returned corresponds only to [start:*partial_end]. Caller has + * to lookup again for [*partial_end:end]. + * + * uniform - Set to 1 when an MTRR covers the region uniformly, i.e. the + * region is fully covered by a single MTRR entry or the default + * type. */ -static u8 __mtrr_type_lookup(u64 start, u64 end, u64 *partial_end, int *repeat) +static u8 mtrr_type_lookup_variable(u64 start, u64 end, u64 *partial_end, + int *repeat, u8 *uniform) { int i; u64 base, mask; u8 prev_match, curr_match; *repeat = 0; - if (!mtrr_state_set) - return 0xFF; - - if (!mtrr_state.enabled) - return 0xFF; + *uniform = 1; - /* Make end inclusive end, instead of exclusive */ + /* Make end inclusive instead of exclusive */ end--; - /* Look in fixed ranges. Just return the type as per start */ - if (mtrr_state.have_fixed && (start < 0x100000)) { - int idx; - - if (start < 0x80000) { - idx = 0; - idx += (start >> 16); - return mtrr_state.fixed_ranges[idx]; - } else if (start < 0xC0000) { - idx = 1 * 8; - idx += ((start - 0x80000) >> 14); - return mtrr_state.fixed_ranges[idx]; - } else if (start < 0x1000000) { - idx = 3 * 8; - idx += ((start - 0xC0000) >> 12); - return mtrr_state.fixed_ranges[idx]; - } - } - - /* - * Look in variable ranges - * Look of multiple ranges matching this address and pick type - * as per MTRR precedence - */ - if (!(mtrr_state.enabled & 2)) - return mtrr_state.def_type; - - prev_match = 0xFF; + prev_match = MTRR_TYPE_INVALID; for (i = 0; i < num_var_ranges; ++i) { - unsigned short start_state, end_state; + unsigned short start_state, end_state, inclusive; if (!(mtrr_state.var_ranges[i].mask_lo & (1 << 11))) continue; @@ -166,20 +183,29 @@ static u8 __mtrr_type_lookup(u64 start, u64 end, u64 *partial_end, int *repeat) start_state = ((start & mask) == (base & mask)); end_state = ((end & mask) == (base & mask)); + inclusive = ((start < base) && (end > base)); - if (start_state != end_state) { + if ((start_state != end_state) || inclusive) { /* * We have start:end spanning across an MTRR. - * We split the region into - * either - * (start:mtrr_end) (mtrr_end:end) - * or - * (start:mtrr_start) (mtrr_start:end) + * We split the region into either + * + * - start_state:1 + * (start:mtrr_end)(mtrr_end:end) + * - end_state:1 + * (start:mtrr_start)(mtrr_start:end) + * - inclusive:1 + * (start:mtrr_start)(mtrr_start:mtrr_end)(mtrr_end:end) + * * depending on kind of overlap. - * Return the type for first region and a pointer to - * the start of second region so that caller will - * lookup again on the second region. - * Note: This way we handle multiple overlaps as well. + * + * Return the type of the first region and a pointer + * to the start of next region so that caller will be + * advised to lookup again after having adjusted start + * and end. + * + * Note: This way we handle overlaps with multiple + * entries and the default type properly. */ if (start_state) *partial_end = base + get_mtrr_size(mask); @@ -193,59 +219,94 @@ static u8 __mtrr_type_lookup(u64 start, u64 end, u64 *partial_end, int *repeat) end = *partial_end - 1; /* end is inclusive */ *repeat = 1; + *uniform = 0; } if ((start & mask) != (base & mask)) continue; curr_match = mtrr_state.var_ranges[i].base_lo & 0xff; - if (prev_match == 0xFF) { + if (prev_match == MTRR_TYPE_INVALID) { prev_match = curr_match; continue; } + *uniform = 0; if (check_type_overlap(&prev_match, &curr_match)) return curr_match; } - if (mtrr_tom2) { - if (start >= (1ULL<<32) && (end < mtrr_tom2)) - return MTRR_TYPE_WRBACK; - } - - if (prev_match != 0xFF) + if (prev_match != MTRR_TYPE_INVALID) return prev_match; return mtrr_state.def_type; } -/* - * Returns the effective MTRR type for the region - * Error return: - * 0xFF - when MTRR is not enabled +/** + * mtrr_type_lookup - look up memory type in MTRR + * + * Return Values: + * MTRR_TYPE_(type) - The effective MTRR type for the region + * MTRR_TYPE_INVALID - MTRR is disabled + * + * Output Argument: + * uniform - Set to 1 when an MTRR covers the region uniformly, i.e. the + * region is fully covered by a single MTRR entry or the default + * type. */ -u8 mtrr_type_lookup(u64 start, u64 end) +u8 mtrr_type_lookup(u64 start, u64 end, u8 *uniform) { - u8 type, prev_type; + u8 type, prev_type, is_uniform = 1, dummy; int repeat; u64 partial_end; - type = __mtrr_type_lookup(start, end, &partial_end, &repeat); + if (!mtrr_state_set) + return MTRR_TYPE_INVALID; + + if (!(mtrr_state.enabled & MTRR_STATE_MTRR_ENABLED)) + return MTRR_TYPE_INVALID; + + /* + * Look up the fixed ranges first, which take priority over + * the variable ranges. + */ + if ((start < 0x100000) && + (mtrr_state.have_fixed) && + (mtrr_state.enabled & MTRR_STATE_MTRR_FIXED_ENABLED)) { + is_uniform = 0; + type = mtrr_type_lookup_fixed(start, end); + goto out; + } + + /* + * Look up the variable ranges. Look of multiple ranges matching + * this address and pick type as per MTRR precedence. + */ + type = mtrr_type_lookup_variable(start, end, &partial_end, + &repeat, &is_uniform); /* * Common path is with repeat = 0. * However, we can have cases where [start:end] spans across some - * MTRR range. Do repeated lookups for that case here. + * MTRR ranges and/or the default type. Do repeated lookups for + * that case here. */ while (repeat) { prev_type = type; start = partial_end; - type = __mtrr_type_lookup(start, end, &partial_end, &repeat); + is_uniform = 0; + type = mtrr_type_lookup_variable(start, end, &partial_end, + &repeat, &dummy); if (check_type_overlap(&prev_type, &type)) - return type; + goto out; } + if (mtrr_tom2 && (start >= (1ULL<<32)) && (end < mtrr_tom2)) + type = MTRR_TYPE_WRBACK; + +out: + *uniform = is_uniform; return type; } @@ -347,7 +408,9 @@ static void __init print_mtrr_state(void) mtrr_attrib_to_str(mtrr_state.def_type)); if (mtrr_state.have_fixed) { pr_debug("MTRR fixed ranges %sabled:\n", - mtrr_state.enabled & 1 ? "en" : "dis"); + ((mtrr_state.enabled & MTRR_STATE_MTRR_ENABLED) && + (mtrr_state.enabled & MTRR_STATE_MTRR_FIXED_ENABLED)) ? + "en" : "dis"); print_fixed(0x00000, 0x10000, mtrr_state.fixed_ranges + 0); for (i = 0; i < 2; ++i) print_fixed(0x80000 + i * 0x20000, 0x04000, @@ -360,7 +423,7 @@ static void __init print_mtrr_state(void) print_fixed_last(); } pr_debug("MTRR variable ranges %sabled:\n", - mtrr_state.enabled & 2 ? "en" : "dis"); + mtrr_state.enabled & MTRR_STATE_MTRR_ENABLED ? "en" : "dis"); high_width = (__ffs64(size_or_mask) - (32 - PAGE_SHIFT) + 3) / 4; for (i = 0; i < num_var_ranges; ++i) { @@ -382,7 +445,7 @@ static void __init print_mtrr_state(void) } /* Grab all of the MTRR state for this CPU into *state */ -void __init get_mtrr_state(void) +bool __init get_mtrr_state(void) { struct mtrr_var_range *vrs; unsigned long flags; @@ -426,6 +489,8 @@ void __init get_mtrr_state(void) post_set(); local_irq_restore(flags); + + return !!(mtrr_state.enabled & MTRR_STATE_MTRR_ENABLED); } /* Some BIOS's are messed up and don't set all MTRRs the same! */ diff --git a/arch/x86/kernel/cpu/mtrr/main.c b/arch/x86/kernel/cpu/mtrr/main.c index ea5f363..e7ed0d8 100644 --- a/arch/x86/kernel/cpu/mtrr/main.c +++ b/arch/x86/kernel/cpu/mtrr/main.c @@ -59,6 +59,12 @@ #define MTRR_TO_PHYS_WC_OFFSET 1000 u32 num_var_ranges; +static bool __mtrr_enabled; + +static bool mtrr_enabled(void) +{ + return __mtrr_enabled; +} unsigned int mtrr_usage_table[MTRR_MAX_VAR_RANGES]; static DEFINE_MUTEX(mtrr_mutex); @@ -286,7 +292,7 @@ int mtrr_add_page(unsigned long base, unsigned long size, int i, replace, error; mtrr_type ltype; - if (!mtrr_if) + if (!mtrr_enabled()) return -ENXIO; error = mtrr_if->validate_add_page(base, size, type); @@ -435,6 +441,8 @@ static int mtrr_check(unsigned long base, unsigned long size) int mtrr_add(unsigned long base, unsigned long size, unsigned int type, bool increment) { + if (!mtrr_enabled()) + return -ENODEV; if (mtrr_check(base, size)) return -EINVAL; return mtrr_add_page(base >> PAGE_SHIFT, size >> PAGE_SHIFT, type, @@ -463,8 +471,8 @@ int mtrr_del_page(int reg, unsigned long base, unsigned long size) unsigned long lbase, lsize; int error = -EINVAL; - if (!mtrr_if) - return -ENXIO; + if (!mtrr_enabled()) + return -ENODEV; max = num_var_ranges; /* No CPU hotplug when we change MTRR entries */ @@ -523,6 +531,8 @@ int mtrr_del_page(int reg, unsigned long base, unsigned long size) */ int mtrr_del(int reg, unsigned long base, unsigned long size) { + if (!mtrr_enabled()) + return -ENODEV; if (mtrr_check(base, size)) return -EINVAL; return mtrr_del_page(reg, base >> PAGE_SHIFT, size >> PAGE_SHIFT); @@ -538,6 +548,9 @@ EXPORT_SYMBOL(mtrr_del); * attempts to add a WC MTRR covering size bytes starting at base and * logs an error if this fails. * + * The called should provide a power of two size on an equivalent + * power of two boundary. + * * Drivers must store the return value to pass to mtrr_del_wc_if_needed, * but drivers should not try to interpret that return value. */ @@ -545,7 +558,7 @@ int arch_phys_wc_add(unsigned long base, unsigned long size) { int ret; - if (pat_enabled) + if (pat_enabled() || !mtrr_enabled()) return 0; /* Success! (We don't need to do anything.) */ ret = mtrr_add(base, size, MTRR_TYPE_WRCOMB, true); @@ -577,7 +590,7 @@ void arch_phys_wc_del(int handle) EXPORT_SYMBOL(arch_phys_wc_del); /* - * phys_wc_to_mtrr_index - translates arch_phys_wc_add's return value + * arch_phys_wc_index - translates arch_phys_wc_add's return value * @handle: Return value from arch_phys_wc_add * * This will turn the return value from arch_phys_wc_add into an mtrr @@ -587,14 +600,14 @@ EXPORT_SYMBOL(arch_phys_wc_del); * in printk line. Alas there is an illegitimate use in some ancient * drm ioctls. */ -int phys_wc_to_mtrr_index(int handle) +int arch_phys_wc_index(int handle) { if (handle < MTRR_TO_PHYS_WC_OFFSET) return -1; else return handle - MTRR_TO_PHYS_WC_OFFSET; } -EXPORT_SYMBOL_GPL(phys_wc_to_mtrr_index); +EXPORT_SYMBOL_GPL(arch_phys_wc_index); /* * HACK ALERT! @@ -734,10 +747,12 @@ void __init mtrr_bp_init(void) } if (mtrr_if) { + __mtrr_enabled = true; set_num_var_ranges(); init_table(); if (use_intel()) { - get_mtrr_state(); + /* BIOS may override */ + __mtrr_enabled = get_mtrr_state(); if (mtrr_cleanup(phys_addr)) { changed_by_mtrr_cleanup = 1; @@ -745,10 +760,16 @@ void __init mtrr_bp_init(void) } } } + + if (!mtrr_enabled()) + pr_info("MTRR: Disabled\n"); } void mtrr_ap_init(void) { + if (!mtrr_enabled()) + return; + if (!use_intel() || mtrr_aps_delayed_init) return; /* @@ -774,6 +795,9 @@ void mtrr_save_state(void) { int first_cpu; + if (!mtrr_enabled()) + return; + get_online_cpus(); first_cpu = cpumask_first(cpu_online_mask); smp_call_function_single(first_cpu, mtrr_save_fixed_ranges, NULL, 1); @@ -782,6 +806,8 @@ void mtrr_save_state(void) void set_mtrr_aps_delayed_init(void) { + if (!mtrr_enabled()) + return; if (!use_intel()) return; @@ -793,7 +819,7 @@ void set_mtrr_aps_delayed_init(void) */ void mtrr_aps_init(void) { - if (!use_intel()) + if (!use_intel() || !mtrr_enabled()) return; /* @@ -810,7 +836,7 @@ void mtrr_aps_init(void) void mtrr_bp_restore(void) { - if (!use_intel()) + if (!use_intel() || !mtrr_enabled()) return; mtrr_if->set_all(); @@ -818,7 +844,7 @@ void mtrr_bp_restore(void) static int __init mtrr_init_finialize(void) { - if (!mtrr_if) + if (!mtrr_enabled()) return 0; if (use_intel()) { diff --git a/arch/x86/kernel/cpu/mtrr/mtrr.h b/arch/x86/kernel/cpu/mtrr/mtrr.h index df5e41f..951884d 100644 --- a/arch/x86/kernel/cpu/mtrr/mtrr.h +++ b/arch/x86/kernel/cpu/mtrr/mtrr.h @@ -51,7 +51,7 @@ void set_mtrr_prepare_save(struct set_mtrr_context *ctxt); void fill_mtrr_var_range(unsigned int index, u32 base_lo, u32 base_hi, u32 mask_lo, u32 mask_hi); -void get_mtrr_state(void); +bool get_mtrr_state(void); extern void set_mtrr_ops(const struct mtrr_ops *ops); diff --git a/arch/x86/kernel/crash.c b/arch/x86/kernel/crash.c index c76d3e3..e068d66 100644 --- a/arch/x86/kernel/crash.c +++ b/arch/x86/kernel/crash.c @@ -22,6 +22,7 @@ #include <linux/elfcore.h> #include <linux/module.h> #include <linux/slab.h> +#include <linux/vmalloc.h> #include <asm/processor.h> #include <asm/hardirq.h> diff --git a/arch/x86/kernel/devicetree.c b/arch/x86/kernel/devicetree.c index 6367a78..5ee7718 100644 --- a/arch/x86/kernel/devicetree.c +++ b/arch/x86/kernel/devicetree.c @@ -4,7 +4,6 @@ #include <linux/bootmem.h> #include <linux/export.h> #include <linux/io.h> -#include <linux/irqdomain.h> #include <linux/interrupt.h> #include <linux/list.h> #include <linux/of.h> @@ -17,6 +16,7 @@ #include <linux/of_pci.h> #include <linux/initrd.h> +#include <asm/irqdomain.h> #include <asm/hpet.h> #include <asm/apic.h> #include <asm/pci_x86.h> @@ -196,38 +196,31 @@ static struct of_ioapic_type of_ioapic_type[] = }, }; -static int ioapic_xlate(struct irq_domain *domain, - struct device_node *controller, - const u32 *intspec, u32 intsize, - irq_hw_number_t *out_hwirq, u32 *out_type) +static int dt_irqdomain_alloc(struct irq_domain *domain, unsigned int virq, + unsigned int nr_irqs, void *arg) { + struct of_phandle_args *irq_data = (void *)arg; struct of_ioapic_type *it; - u32 line, idx, gsi; + struct irq_alloc_info tmp; - if (WARN_ON(intsize < 2)) + if (WARN_ON(irq_data->args_count < 2)) return -EINVAL; - - line = intspec[0]; - - if (intspec[1] >= ARRAY_SIZE(of_ioapic_type)) + if (irq_data->args[1] >= ARRAY_SIZE(of_ioapic_type)) return -EINVAL; - it = &of_ioapic_type[intspec[1]]; + it = &of_ioapic_type[irq_data->args[1]]; + ioapic_set_alloc_attr(&tmp, NUMA_NO_NODE, it->trigger, it->polarity); + tmp.ioapic_id = mpc_ioapic_id(mp_irqdomain_ioapic_idx(domain)); + tmp.ioapic_pin = irq_data->args[0]; - idx = (u32)(long)domain->host_data; - gsi = mp_pin_to_gsi(idx, line); - if (mp_set_gsi_attr(gsi, it->trigger, it->polarity, cpu_to_node(0))) - return -EBUSY; - - *out_hwirq = line; - *out_type = it->out_type; - return 0; + return mp_irqdomain_alloc(domain, virq, nr_irqs, &tmp); } -const struct irq_domain_ops ioapic_irq_domain_ops = { - .map = mp_irqdomain_map, - .unmap = mp_irqdomain_unmap, - .xlate = ioapic_xlate, +static const struct irq_domain_ops ioapic_irq_domain_ops = { + .alloc = dt_irqdomain_alloc, + .free = mp_irqdomain_free, + .activate = mp_irqdomain_activate, + .deactivate = mp_irqdomain_deactivate, }; static void __init dtb_add_ioapic(struct device_node *dn) diff --git a/arch/x86/kernel/early-quirks.c b/arch/x86/kernel/early-quirks.c index fe9f0b7..5cb9a4d 100644 --- a/arch/x86/kernel/early-quirks.c +++ b/arch/x86/kernel/early-quirks.c @@ -627,8 +627,12 @@ static struct chipset early_qrk[] __initdata = { { PCI_VENDOR_ID_INTEL, PCI_ANY_ID, PCI_CLASS_DISPLAY_VGA, PCI_ANY_ID, QFLAG_APPLY_ONCE, intel_graphics_stolen }, /* - * HPET on current version of Baytrail platform has accuracy - * problems, disable it for now: + * HPET on the current version of the Baytrail platform has accuracy + * problems: it will halt in deep idle state - so we disable it. + * + * More details can be found in section 18.10.1.3 of the datasheet: + * + * http://www.intel.com/content/dam/www/public/us/en/documents/datasheets/atom-z8000-datasheet-vol-1.pdf */ { PCI_VENDOR_ID_INTEL, 0x0f00, PCI_CLASS_BRIDGE_HOST, PCI_ANY_ID, 0, force_disable_hpet}, diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S deleted file mode 100644 index 1c30976..0000000 --- a/arch/x86/kernel/entry_32.S +++ /dev/null @@ -1,1401 +0,0 @@ -/* - * - * Copyright (C) 1991, 1992 Linus Torvalds - */ - -/* - * entry.S contains the system-call and fault low-level handling routines. - * This also contains the timer-interrupt handler, as well as all interrupts - * and faults that can result in a task-switch. - * - * NOTE: This code handles signal-recognition, which happens every time - * after a timer-interrupt and after each system call. - * - * I changed all the .align's to 4 (16 byte alignment), as that's faster - * on a 486. - * - * Stack layout in 'syscall_exit': - * ptrace needs to have all regs on the stack. - * if the order here is changed, it needs to be - * updated in fork.c:copy_process, signal.c:do_signal, - * ptrace.c and ptrace.h - * - * 0(%esp) - %ebx - * 4(%esp) - %ecx - * 8(%esp) - %edx - * C(%esp) - %esi - * 10(%esp) - %edi - * 14(%esp) - %ebp - * 18(%esp) - %eax - * 1C(%esp) - %ds - * 20(%esp) - %es - * 24(%esp) - %fs - * 28(%esp) - %gs saved iff !CONFIG_X86_32_LAZY_GS - * 2C(%esp) - orig_eax - * 30(%esp) - %eip - * 34(%esp) - %cs - * 38(%esp) - %eflags - * 3C(%esp) - %oldesp - * 40(%esp) - %oldss - * - * "current" is in register %ebx during any slow entries. - */ - -#include <linux/linkage.h> -#include <linux/err.h> -#include <asm/thread_info.h> -#include <asm/irqflags.h> -#include <asm/errno.h> -#include <asm/segment.h> -#include <asm/smp.h> -#include <asm/page_types.h> -#include <asm/percpu.h> -#include <asm/dwarf2.h> -#include <asm/processor-flags.h> -#include <asm/ftrace.h> -#include <asm/irq_vectors.h> -#include <asm/cpufeature.h> -#include <asm/alternative-asm.h> -#include <asm/asm.h> -#include <asm/smap.h> - -/* Avoid __ASSEMBLER__'ifying <linux/audit.h> just for this. */ -#include <linux/elf-em.h> -#define AUDIT_ARCH_I386 (EM_386|__AUDIT_ARCH_LE) -#define __AUDIT_ARCH_LE 0x40000000 - -#ifndef CONFIG_AUDITSYSCALL -#define sysenter_audit syscall_trace_entry -#define sysexit_audit syscall_exit_work -#endif - - .section .entry.text, "ax" - -/* - * We use macros for low-level operations which need to be overridden - * for paravirtualization. The following will never clobber any registers: - * INTERRUPT_RETURN (aka. "iret") - * GET_CR0_INTO_EAX (aka. "movl %cr0, %eax") - * ENABLE_INTERRUPTS_SYSEXIT (aka "sti; sysexit"). - * - * For DISABLE_INTERRUPTS/ENABLE_INTERRUPTS (aka "cli"/"sti"), you must - * specify what registers can be overwritten (CLBR_NONE, CLBR_EAX/EDX/ECX/ANY). - * Allowing a register to be clobbered can shrink the paravirt replacement - * enough to patch inline, increasing performance. - */ - -#ifdef CONFIG_PREEMPT -#define preempt_stop(clobbers) DISABLE_INTERRUPTS(clobbers); TRACE_IRQS_OFF -#else -#define preempt_stop(clobbers) -#define resume_kernel restore_all -#endif - -.macro TRACE_IRQS_IRET -#ifdef CONFIG_TRACE_IRQFLAGS - testl $X86_EFLAGS_IF,PT_EFLAGS(%esp) # interrupts off? - jz 1f - TRACE_IRQS_ON -1: -#endif -.endm - -/* - * User gs save/restore - * - * %gs is used for userland TLS and kernel only uses it for stack - * canary which is required to be at %gs:20 by gcc. Read the comment - * at the top of stackprotector.h for more info. - * - * Local labels 98 and 99 are used. - */ -#ifdef CONFIG_X86_32_LAZY_GS - - /* unfortunately push/pop can't be no-op */ -.macro PUSH_GS - pushl_cfi $0 -.endm -.macro POP_GS pop=0 - addl $(4 + \pop), %esp - CFI_ADJUST_CFA_OFFSET -(4 + \pop) -.endm -.macro POP_GS_EX -.endm - - /* all the rest are no-op */ -.macro PTGS_TO_GS -.endm -.macro PTGS_TO_GS_EX -.endm -.macro GS_TO_REG reg -.endm -.macro REG_TO_PTGS reg -.endm -.macro SET_KERNEL_GS reg -.endm - -#else /* CONFIG_X86_32_LAZY_GS */ - -.macro PUSH_GS - pushl_cfi %gs - /*CFI_REL_OFFSET gs, 0*/ -.endm - -.macro POP_GS pop=0 -98: popl_cfi %gs - /*CFI_RESTORE gs*/ - .if \pop <> 0 - add $\pop, %esp - CFI_ADJUST_CFA_OFFSET -\pop - .endif -.endm -.macro POP_GS_EX -.pushsection .fixup, "ax" -99: movl $0, (%esp) - jmp 98b -.popsection - _ASM_EXTABLE(98b,99b) -.endm - -.macro PTGS_TO_GS -98: mov PT_GS(%esp), %gs -.endm -.macro PTGS_TO_GS_EX -.pushsection .fixup, "ax" -99: movl $0, PT_GS(%esp) - jmp 98b -.popsection - _ASM_EXTABLE(98b,99b) -.endm - -.macro GS_TO_REG reg - movl %gs, \reg - /*CFI_REGISTER gs, \reg*/ -.endm -.macro REG_TO_PTGS reg - movl \reg, PT_GS(%esp) - /*CFI_REL_OFFSET gs, PT_GS*/ -.endm -.macro SET_KERNEL_GS reg - movl $(__KERNEL_STACK_CANARY), \reg - movl \reg, %gs -.endm - -#endif /* CONFIG_X86_32_LAZY_GS */ - -.macro SAVE_ALL - cld - PUSH_GS - pushl_cfi %fs - /*CFI_REL_OFFSET fs, 0;*/ - pushl_cfi %es - /*CFI_REL_OFFSET es, 0;*/ - pushl_cfi %ds - /*CFI_REL_OFFSET ds, 0;*/ - pushl_cfi %eax - CFI_REL_OFFSET eax, 0 - pushl_cfi %ebp - CFI_REL_OFFSET ebp, 0 - pushl_cfi %edi - CFI_REL_OFFSET edi, 0 - pushl_cfi %esi - CFI_REL_OFFSET esi, 0 - pushl_cfi %edx - CFI_REL_OFFSET edx, 0 - pushl_cfi %ecx - CFI_REL_OFFSET ecx, 0 - pushl_cfi %ebx - CFI_REL_OFFSET ebx, 0 - movl $(__USER_DS), %edx - movl %edx, %ds - movl %edx, %es - movl $(__KERNEL_PERCPU), %edx - movl %edx, %fs - SET_KERNEL_GS %edx -.endm - -.macro RESTORE_INT_REGS - popl_cfi %ebx - CFI_RESTORE ebx - popl_cfi %ecx - CFI_RESTORE ecx - popl_cfi %edx - CFI_RESTORE edx - popl_cfi %esi - CFI_RESTORE esi - popl_cfi %edi - CFI_RESTORE edi - popl_cfi %ebp - CFI_RESTORE ebp - popl_cfi %eax - CFI_RESTORE eax -.endm - -.macro RESTORE_REGS pop=0 - RESTORE_INT_REGS -1: popl_cfi %ds - /*CFI_RESTORE ds;*/ -2: popl_cfi %es - /*CFI_RESTORE es;*/ -3: popl_cfi %fs - /*CFI_RESTORE fs;*/ - POP_GS \pop -.pushsection .fixup, "ax" -4: movl $0, (%esp) - jmp 1b -5: movl $0, (%esp) - jmp 2b -6: movl $0, (%esp) - jmp 3b -.popsection - _ASM_EXTABLE(1b,4b) - _ASM_EXTABLE(2b,5b) - _ASM_EXTABLE(3b,6b) - POP_GS_EX -.endm - -.macro RING0_INT_FRAME - CFI_STARTPROC simple - CFI_SIGNAL_FRAME - CFI_DEF_CFA esp, 3*4 - /*CFI_OFFSET cs, -2*4;*/ - CFI_OFFSET eip, -3*4 -.endm - -.macro RING0_EC_FRAME - CFI_STARTPROC simple - CFI_SIGNAL_FRAME - CFI_DEF_CFA esp, 4*4 - /*CFI_OFFSET cs, -2*4;*/ - CFI_OFFSET eip, -3*4 -.endm - -.macro RING0_PTREGS_FRAME - CFI_STARTPROC simple - CFI_SIGNAL_FRAME - CFI_DEF_CFA esp, PT_OLDESP-PT_EBX - /*CFI_OFFSET cs, PT_CS-PT_OLDESP;*/ - CFI_OFFSET eip, PT_EIP-PT_OLDESP - /*CFI_OFFSET es, PT_ES-PT_OLDESP;*/ - /*CFI_OFFSET ds, PT_DS-PT_OLDESP;*/ - CFI_OFFSET eax, PT_EAX-PT_OLDESP - CFI_OFFSET ebp, PT_EBP-PT_OLDESP - CFI_OFFSET edi, PT_EDI-PT_OLDESP - CFI_OFFSET esi, PT_ESI-PT_OLDESP - CFI_OFFSET edx, PT_EDX-PT_OLDESP - CFI_OFFSET ecx, PT_ECX-PT_OLDESP - CFI_OFFSET ebx, PT_EBX-PT_OLDESP -.endm - -ENTRY(ret_from_fork) - CFI_STARTPROC - pushl_cfi %eax - call schedule_tail - GET_THREAD_INFO(%ebp) - popl_cfi %eax - pushl_cfi $0x0202 # Reset kernel eflags - popfl_cfi - jmp syscall_exit - CFI_ENDPROC -END(ret_from_fork) - -ENTRY(ret_from_kernel_thread) - CFI_STARTPROC - pushl_cfi %eax - call schedule_tail - GET_THREAD_INFO(%ebp) - popl_cfi %eax - pushl_cfi $0x0202 # Reset kernel eflags - popfl_cfi - movl PT_EBP(%esp),%eax - call *PT_EBX(%esp) - movl $0,PT_EAX(%esp) - jmp syscall_exit - CFI_ENDPROC -ENDPROC(ret_from_kernel_thread) - -/* - * Return to user mode is not as complex as all this looks, - * but we want the default path for a system call return to - * go as quickly as possible which is why some of this is - * less clear than it otherwise should be. - */ - - # userspace resumption stub bypassing syscall exit tracing - ALIGN - RING0_PTREGS_FRAME -ret_from_exception: - preempt_stop(CLBR_ANY) -ret_from_intr: - GET_THREAD_INFO(%ebp) -#ifdef CONFIG_VM86 - movl PT_EFLAGS(%esp), %eax # mix EFLAGS and CS - movb PT_CS(%esp), %al - andl $(X86_EFLAGS_VM | SEGMENT_RPL_MASK), %eax -#else - /* - * We can be coming here from child spawned by kernel_thread(). - */ - movl PT_CS(%esp), %eax - andl $SEGMENT_RPL_MASK, %eax -#endif - cmpl $USER_RPL, %eax - jb resume_kernel # not returning to v8086 or userspace - -ENTRY(resume_userspace) - LOCKDEP_SYS_EXIT - DISABLE_INTERRUPTS(CLBR_ANY) # make sure we don't miss an interrupt - # setting need_resched or sigpending - # between sampling and the iret - TRACE_IRQS_OFF - movl TI_flags(%ebp), %ecx - andl $_TIF_WORK_MASK, %ecx # is there any work to be done on - # int/exception return? - jne work_pending - jmp restore_all -END(ret_from_exception) - -#ifdef CONFIG_PREEMPT -ENTRY(resume_kernel) - DISABLE_INTERRUPTS(CLBR_ANY) -need_resched: - cmpl $0,PER_CPU_VAR(__preempt_count) - jnz restore_all - testl $X86_EFLAGS_IF,PT_EFLAGS(%esp) # interrupts off (exception path) ? - jz restore_all - call preempt_schedule_irq - jmp need_resched -END(resume_kernel) -#endif - CFI_ENDPROC - -/* SYSENTER_RETURN points to after the "sysenter" instruction in - the vsyscall page. See vsyscall-sysentry.S, which defines the symbol. */ - - # sysenter call handler stub -ENTRY(ia32_sysenter_target) - CFI_STARTPROC simple - CFI_SIGNAL_FRAME - CFI_DEF_CFA esp, 0 - CFI_REGISTER esp, ebp - movl TSS_sysenter_sp0(%esp),%esp -sysenter_past_esp: - /* - * Interrupts are disabled here, but we can't trace it until - * enough kernel state to call TRACE_IRQS_OFF can be called - but - * we immediately enable interrupts at that point anyway. - */ - pushl_cfi $__USER_DS - /*CFI_REL_OFFSET ss, 0*/ - pushl_cfi %ebp - CFI_REL_OFFSET esp, 0 - pushfl_cfi - orl $X86_EFLAGS_IF, (%esp) - pushl_cfi $__USER_CS - /*CFI_REL_OFFSET cs, 0*/ - /* - * Push current_thread_info()->sysenter_return to the stack. - * A tiny bit of offset fixup is necessary: TI_sysenter_return - * is relative to thread_info, which is at the bottom of the - * kernel stack page. 4*4 means the 4 words pushed above; - * TOP_OF_KERNEL_STACK_PADDING takes us to the top of the stack; - * and THREAD_SIZE takes us to the bottom. - */ - pushl_cfi ((TI_sysenter_return) - THREAD_SIZE + TOP_OF_KERNEL_STACK_PADDING + 4*4)(%esp) - CFI_REL_OFFSET eip, 0 - - pushl_cfi %eax - SAVE_ALL - ENABLE_INTERRUPTS(CLBR_NONE) - -/* - * Load the potential sixth argument from user stack. - * Careful about security. - */ - cmpl $__PAGE_OFFSET-3,%ebp - jae syscall_fault - ASM_STAC -1: movl (%ebp),%ebp - ASM_CLAC - movl %ebp,PT_EBP(%esp) - _ASM_EXTABLE(1b,syscall_fault) - - GET_THREAD_INFO(%ebp) - - testl $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%ebp) - jnz sysenter_audit -sysenter_do_call: - cmpl $(NR_syscalls), %eax - jae sysenter_badsys - call *sys_call_table(,%eax,4) -sysenter_after_call: - movl %eax,PT_EAX(%esp) - LOCKDEP_SYS_EXIT - DISABLE_INTERRUPTS(CLBR_ANY) - TRACE_IRQS_OFF - movl TI_flags(%ebp), %ecx - testl $_TIF_ALLWORK_MASK, %ecx - jnz sysexit_audit -sysenter_exit: -/* if something modifies registers it must also disable sysexit */ - movl PT_EIP(%esp), %edx - movl PT_OLDESP(%esp), %ecx - xorl %ebp,%ebp - TRACE_IRQS_ON -1: mov PT_FS(%esp), %fs - PTGS_TO_GS - ENABLE_INTERRUPTS_SYSEXIT - -#ifdef CONFIG_AUDITSYSCALL -sysenter_audit: - testl $(_TIF_WORK_SYSCALL_ENTRY & ~_TIF_SYSCALL_AUDIT),TI_flags(%ebp) - jnz syscall_trace_entry - /* movl PT_EAX(%esp), %eax already set, syscall number: 1st arg to audit */ - movl PT_EBX(%esp), %edx /* ebx/a0: 2nd arg to audit */ - /* movl PT_ECX(%esp), %ecx already set, a1: 3nd arg to audit */ - pushl_cfi PT_ESI(%esp) /* a3: 5th arg */ - pushl_cfi PT_EDX+4(%esp) /* a2: 4th arg */ - call __audit_syscall_entry - popl_cfi %ecx /* get that remapped edx off the stack */ - popl_cfi %ecx /* get that remapped esi off the stack */ - movl PT_EAX(%esp),%eax /* reload syscall number */ - jmp sysenter_do_call - -sysexit_audit: - testl $(_TIF_ALLWORK_MASK & ~_TIF_SYSCALL_AUDIT), %ecx - jnz syscall_exit_work - TRACE_IRQS_ON - ENABLE_INTERRUPTS(CLBR_ANY) - movl %eax,%edx /* second arg, syscall return value */ - cmpl $-MAX_ERRNO,%eax /* is it an error ? */ - setbe %al /* 1 if so, 0 if not */ - movzbl %al,%eax /* zero-extend that */ - call __audit_syscall_exit - DISABLE_INTERRUPTS(CLBR_ANY) - TRACE_IRQS_OFF - movl TI_flags(%ebp), %ecx - testl $(_TIF_ALLWORK_MASK & ~_TIF_SYSCALL_AUDIT), %ecx - jnz syscall_exit_work - movl PT_EAX(%esp),%eax /* reload syscall return value */ - jmp sysenter_exit -#endif - - CFI_ENDPROC -.pushsection .fixup,"ax" -2: movl $0,PT_FS(%esp) - jmp 1b -.popsection - _ASM_EXTABLE(1b,2b) - PTGS_TO_GS_EX -ENDPROC(ia32_sysenter_target) - - # system call handler stub -ENTRY(system_call) - RING0_INT_FRAME # can't unwind into user space anyway - ASM_CLAC - pushl_cfi %eax # save orig_eax - SAVE_ALL - GET_THREAD_INFO(%ebp) - # system call tracing in operation / emulation - testl $_TIF_WORK_SYSCALL_ENTRY,TI_flags(%ebp) - jnz syscall_trace_entry - cmpl $(NR_syscalls), %eax - jae syscall_badsys -syscall_call: - call *sys_call_table(,%eax,4) -syscall_after_call: - movl %eax,PT_EAX(%esp) # store the return value -syscall_exit: - LOCKDEP_SYS_EXIT - DISABLE_INTERRUPTS(CLBR_ANY) # make sure we don't miss an interrupt - # setting need_resched or sigpending - # between sampling and the iret - TRACE_IRQS_OFF - movl TI_flags(%ebp), %ecx - testl $_TIF_ALLWORK_MASK, %ecx # current->work - jnz syscall_exit_work - -restore_all: - TRACE_IRQS_IRET -restore_all_notrace: -#ifdef CONFIG_X86_ESPFIX32 - movl PT_EFLAGS(%esp), %eax # mix EFLAGS, SS and CS - # Warning: PT_OLDSS(%esp) contains the wrong/random values if we - # are returning to the kernel. - # See comments in process.c:copy_thread() for details. - movb PT_OLDSS(%esp), %ah - movb PT_CS(%esp), %al - andl $(X86_EFLAGS_VM | (SEGMENT_TI_MASK << 8) | SEGMENT_RPL_MASK), %eax - cmpl $((SEGMENT_LDT << 8) | USER_RPL), %eax - CFI_REMEMBER_STATE - je ldt_ss # returning to user-space with LDT SS -#endif -restore_nocheck: - RESTORE_REGS 4 # skip orig_eax/error_code -irq_return: - INTERRUPT_RETURN -.section .fixup,"ax" -ENTRY(iret_exc) - pushl $0 # no error code - pushl $do_iret_error - jmp error_code -.previous - _ASM_EXTABLE(irq_return,iret_exc) - -#ifdef CONFIG_X86_ESPFIX32 - CFI_RESTORE_STATE -ldt_ss: -#ifdef CONFIG_PARAVIRT - /* - * The kernel can't run on a non-flat stack if paravirt mode - * is active. Rather than try to fixup the high bits of - * ESP, bypass this code entirely. This may break DOSemu - * and/or Wine support in a paravirt VM, although the option - * is still available to implement the setting of the high - * 16-bits in the INTERRUPT_RETURN paravirt-op. - */ - cmpl $0, pv_info+PARAVIRT_enabled - jne restore_nocheck -#endif - -/* - * Setup and switch to ESPFIX stack - * - * We're returning to userspace with a 16 bit stack. The CPU will not - * restore the high word of ESP for us on executing iret... This is an - * "official" bug of all the x86-compatible CPUs, which we can work - * around to make dosemu and wine happy. We do this by preloading the - * high word of ESP with the high word of the userspace ESP while - * compensating for the offset by changing to the ESPFIX segment with - * a base address that matches for the difference. - */ -#define GDT_ESPFIX_SS PER_CPU_VAR(gdt_page) + (GDT_ENTRY_ESPFIX_SS * 8) - mov %esp, %edx /* load kernel esp */ - mov PT_OLDESP(%esp), %eax /* load userspace esp */ - mov %dx, %ax /* eax: new kernel esp */ - sub %eax, %edx /* offset (low word is 0) */ - shr $16, %edx - mov %dl, GDT_ESPFIX_SS + 4 /* bits 16..23 */ - mov %dh, GDT_ESPFIX_SS + 7 /* bits 24..31 */ - pushl_cfi $__ESPFIX_SS - pushl_cfi %eax /* new kernel esp */ - /* Disable interrupts, but do not irqtrace this section: we - * will soon execute iret and the tracer was already set to - * the irqstate after the iret */ - DISABLE_INTERRUPTS(CLBR_EAX) - lss (%esp), %esp /* switch to espfix segment */ - CFI_ADJUST_CFA_OFFSET -8 - jmp restore_nocheck -#endif - CFI_ENDPROC -ENDPROC(system_call) - - # perform work that needs to be done immediately before resumption - ALIGN - RING0_PTREGS_FRAME # can't unwind into user space anyway -work_pending: - testb $_TIF_NEED_RESCHED, %cl - jz work_notifysig -work_resched: - call schedule - LOCKDEP_SYS_EXIT - DISABLE_INTERRUPTS(CLBR_ANY) # make sure we don't miss an interrupt - # setting need_resched or sigpending - # between sampling and the iret - TRACE_IRQS_OFF - movl TI_flags(%ebp), %ecx - andl $_TIF_WORK_MASK, %ecx # is there any work to be done other - # than syscall tracing? - jz restore_all - testb $_TIF_NEED_RESCHED, %cl - jnz work_resched - -work_notifysig: # deal with pending signals and - # notify-resume requests -#ifdef CONFIG_VM86 - testl $X86_EFLAGS_VM, PT_EFLAGS(%esp) - movl %esp, %eax - jnz work_notifysig_v86 # returning to kernel-space or - # vm86-space -1: -#else - movl %esp, %eax -#endif - TRACE_IRQS_ON - ENABLE_INTERRUPTS(CLBR_NONE) - movb PT_CS(%esp), %bl - andb $SEGMENT_RPL_MASK, %bl - cmpb $USER_RPL, %bl - jb resume_kernel - xorl %edx, %edx - call do_notify_resume - jmp resume_userspace - -#ifdef CONFIG_VM86 - ALIGN -work_notifysig_v86: - pushl_cfi %ecx # save ti_flags for do_notify_resume - call save_v86_state # %eax contains pt_regs pointer - popl_cfi %ecx - movl %eax, %esp - jmp 1b -#endif -END(work_pending) - - # perform syscall exit tracing - ALIGN -syscall_trace_entry: - movl $-ENOSYS,PT_EAX(%esp) - movl %esp, %eax - call syscall_trace_enter - /* What it returned is what we'll actually use. */ - cmpl $(NR_syscalls), %eax - jnae syscall_call - jmp syscall_exit -END(syscall_trace_entry) - - # perform syscall exit tracing - ALIGN -syscall_exit_work: - testl $_TIF_WORK_SYSCALL_EXIT, %ecx - jz work_pending - TRACE_IRQS_ON - ENABLE_INTERRUPTS(CLBR_ANY) # could let syscall_trace_leave() call - # schedule() instead - movl %esp, %eax - call syscall_trace_leave - jmp resume_userspace -END(syscall_exit_work) - CFI_ENDPROC - - RING0_INT_FRAME # can't unwind into user space anyway -syscall_fault: - ASM_CLAC - GET_THREAD_INFO(%ebp) - movl $-EFAULT,PT_EAX(%esp) - jmp resume_userspace -END(syscall_fault) - -syscall_badsys: - movl $-ENOSYS,%eax - jmp syscall_after_call -END(syscall_badsys) - -sysenter_badsys: - movl $-ENOSYS,%eax - jmp sysenter_after_call -END(sysenter_badsys) - CFI_ENDPROC - -.macro FIXUP_ESPFIX_STACK -/* - * Switch back for ESPFIX stack to the normal zerobased stack - * - * We can't call C functions using the ESPFIX stack. This code reads - * the high word of the segment base from the GDT and swiches to the - * normal stack and adjusts ESP with the matching offset. - */ -#ifdef CONFIG_X86_ESPFIX32 - /* fixup the stack */ - mov GDT_ESPFIX_SS + 4, %al /* bits 16..23 */ - mov GDT_ESPFIX_SS + 7, %ah /* bits 24..31 */ - shl $16, %eax - addl %esp, %eax /* the adjusted stack pointer */ - pushl_cfi $__KERNEL_DS - pushl_cfi %eax - lss (%esp), %esp /* switch to the normal stack segment */ - CFI_ADJUST_CFA_OFFSET -8 -#endif -.endm -.macro UNWIND_ESPFIX_STACK -#ifdef CONFIG_X86_ESPFIX32 - movl %ss, %eax - /* see if on espfix stack */ - cmpw $__ESPFIX_SS, %ax - jne 27f - movl $__KERNEL_DS, %eax - movl %eax, %ds - movl %eax, %es - /* switch to normal stack */ - FIXUP_ESPFIX_STACK -27: -#endif -.endm - -/* - * Build the entry stubs with some assembler magic. - * We pack 1 stub into every 8-byte block. - */ - .align 8 -ENTRY(irq_entries_start) - RING0_INT_FRAME - vector=FIRST_EXTERNAL_VECTOR - .rept (FIRST_SYSTEM_VECTOR - FIRST_EXTERNAL_VECTOR) - pushl_cfi $(~vector+0x80) /* Note: always in signed byte range */ - vector=vector+1 - jmp common_interrupt - CFI_ADJUST_CFA_OFFSET -4 - .align 8 - .endr -END(irq_entries_start) - -/* - * the CPU automatically disables interrupts when executing an IRQ vector, - * so IRQ-flags tracing has to follow that: - */ - .p2align CONFIG_X86_L1_CACHE_SHIFT -common_interrupt: - ASM_CLAC - addl $-0x80,(%esp) /* Adjust vector into the [-256,-1] range */ - SAVE_ALL - TRACE_IRQS_OFF - movl %esp,%eax - call do_IRQ - jmp ret_from_intr -ENDPROC(common_interrupt) - CFI_ENDPROC - -#define BUILD_INTERRUPT3(name, nr, fn) \ -ENTRY(name) \ - RING0_INT_FRAME; \ - ASM_CLAC; \ - pushl_cfi $~(nr); \ - SAVE_ALL; \ - TRACE_IRQS_OFF \ - movl %esp,%eax; \ - call fn; \ - jmp ret_from_intr; \ - CFI_ENDPROC; \ -ENDPROC(name) - - -#ifdef CONFIG_TRACING -#define TRACE_BUILD_INTERRUPT(name, nr) \ - BUILD_INTERRUPT3(trace_##name, nr, smp_trace_##name) -#else -#define TRACE_BUILD_INTERRUPT(name, nr) -#endif - -#define BUILD_INTERRUPT(name, nr) \ - BUILD_INTERRUPT3(name, nr, smp_##name); \ - TRACE_BUILD_INTERRUPT(name, nr) - -/* The include is where all of the SMP etc. interrupts come from */ -#include <asm/entry_arch.h> - -ENTRY(coprocessor_error) - RING0_INT_FRAME - ASM_CLAC - pushl_cfi $0 - pushl_cfi $do_coprocessor_error - jmp error_code - CFI_ENDPROC -END(coprocessor_error) - -ENTRY(simd_coprocessor_error) - RING0_INT_FRAME - ASM_CLAC - pushl_cfi $0 -#ifdef CONFIG_X86_INVD_BUG - /* AMD 486 bug: invd from userspace calls exception 19 instead of #GP */ - ALTERNATIVE "pushl_cfi $do_general_protection", \ - "pushl $do_simd_coprocessor_error", \ - X86_FEATURE_XMM -#else - pushl_cfi $do_simd_coprocessor_error -#endif - jmp error_code - CFI_ENDPROC -END(simd_coprocessor_error) - -ENTRY(device_not_available) - RING0_INT_FRAME - ASM_CLAC - pushl_cfi $-1 # mark this as an int - pushl_cfi $do_device_not_available - jmp error_code - CFI_ENDPROC -END(device_not_available) - -#ifdef CONFIG_PARAVIRT -ENTRY(native_iret) - iret - _ASM_EXTABLE(native_iret, iret_exc) -END(native_iret) - -ENTRY(native_irq_enable_sysexit) - sti - sysexit -END(native_irq_enable_sysexit) -#endif - -ENTRY(overflow) - RING0_INT_FRAME - ASM_CLAC - pushl_cfi $0 - pushl_cfi $do_overflow - jmp error_code - CFI_ENDPROC -END(overflow) - -ENTRY(bounds) - RING0_INT_FRAME - ASM_CLAC - pushl_cfi $0 - pushl_cfi $do_bounds - jmp error_code - CFI_ENDPROC -END(bounds) - -ENTRY(invalid_op) - RING0_INT_FRAME - ASM_CLAC - pushl_cfi $0 - pushl_cfi $do_invalid_op - jmp error_code - CFI_ENDPROC -END(invalid_op) - -ENTRY(coprocessor_segment_overrun) - RING0_INT_FRAME - ASM_CLAC - pushl_cfi $0 - pushl_cfi $do_coprocessor_segment_overrun - jmp error_code - CFI_ENDPROC -END(coprocessor_segment_overrun) - -ENTRY(invalid_TSS) - RING0_EC_FRAME - ASM_CLAC - pushl_cfi $do_invalid_TSS - jmp error_code - CFI_ENDPROC -END(invalid_TSS) - -ENTRY(segment_not_present) - RING0_EC_FRAME - ASM_CLAC - pushl_cfi $do_segment_not_present - jmp error_code - CFI_ENDPROC -END(segment_not_present) - -ENTRY(stack_segment) - RING0_EC_FRAME - ASM_CLAC - pushl_cfi $do_stack_segment - jmp error_code - CFI_ENDPROC -END(stack_segment) - -ENTRY(alignment_check) - RING0_EC_FRAME - ASM_CLAC - pushl_cfi $do_alignment_check - jmp error_code - CFI_ENDPROC -END(alignment_check) - -ENTRY(divide_error) - RING0_INT_FRAME - ASM_CLAC - pushl_cfi $0 # no error code - pushl_cfi $do_divide_error - jmp error_code - CFI_ENDPROC -END(divide_error) - -#ifdef CONFIG_X86_MCE -ENTRY(machine_check) - RING0_INT_FRAME - ASM_CLAC - pushl_cfi $0 - pushl_cfi machine_check_vector - jmp error_code - CFI_ENDPROC -END(machine_check) -#endif - -ENTRY(spurious_interrupt_bug) - RING0_INT_FRAME - ASM_CLAC - pushl_cfi $0 - pushl_cfi $do_spurious_interrupt_bug - jmp error_code - CFI_ENDPROC -END(spurious_interrupt_bug) - -#ifdef CONFIG_XEN -/* Xen doesn't set %esp to be precisely what the normal sysenter - entrypoint expects, so fix it up before using the normal path. */ -ENTRY(xen_sysenter_target) - RING0_INT_FRAME - addl $5*4, %esp /* remove xen-provided frame */ - CFI_ADJUST_CFA_OFFSET -5*4 - jmp sysenter_past_esp - CFI_ENDPROC - -ENTRY(xen_hypervisor_callback) - CFI_STARTPROC - pushl_cfi $-1 /* orig_ax = -1 => not a system call */ - SAVE_ALL - TRACE_IRQS_OFF - - /* Check to see if we got the event in the critical - region in xen_iret_direct, after we've reenabled - events and checked for pending events. This simulates - iret instruction's behaviour where it delivers a - pending interrupt when enabling interrupts. */ - movl PT_EIP(%esp),%eax - cmpl $xen_iret_start_crit,%eax - jb 1f - cmpl $xen_iret_end_crit,%eax - jae 1f - - jmp xen_iret_crit_fixup - -ENTRY(xen_do_upcall) -1: mov %esp, %eax - call xen_evtchn_do_upcall -#ifndef CONFIG_PREEMPT - call xen_maybe_preempt_hcall -#endif - jmp ret_from_intr - CFI_ENDPROC -ENDPROC(xen_hypervisor_callback) - -# Hypervisor uses this for application faults while it executes. -# We get here for two reasons: -# 1. Fault while reloading DS, ES, FS or GS -# 2. Fault while executing IRET -# Category 1 we fix up by reattempting the load, and zeroing the segment -# register if the load fails. -# Category 2 we fix up by jumping to do_iret_error. We cannot use the -# normal Linux return path in this case because if we use the IRET hypercall -# to pop the stack frame we end up in an infinite loop of failsafe callbacks. -# We distinguish between categories by maintaining a status value in EAX. -ENTRY(xen_failsafe_callback) - CFI_STARTPROC - pushl_cfi %eax - movl $1,%eax -1: mov 4(%esp),%ds -2: mov 8(%esp),%es -3: mov 12(%esp),%fs -4: mov 16(%esp),%gs - /* EAX == 0 => Category 1 (Bad segment) - EAX != 0 => Category 2 (Bad IRET) */ - testl %eax,%eax - popl_cfi %eax - lea 16(%esp),%esp - CFI_ADJUST_CFA_OFFSET -16 - jz 5f - jmp iret_exc -5: pushl_cfi $-1 /* orig_ax = -1 => not a system call */ - SAVE_ALL - jmp ret_from_exception - CFI_ENDPROC - -.section .fixup,"ax" -6: xorl %eax,%eax - movl %eax,4(%esp) - jmp 1b -7: xorl %eax,%eax - movl %eax,8(%esp) - jmp 2b -8: xorl %eax,%eax - movl %eax,12(%esp) - jmp 3b -9: xorl %eax,%eax - movl %eax,16(%esp) - jmp 4b -.previous - _ASM_EXTABLE(1b,6b) - _ASM_EXTABLE(2b,7b) - _ASM_EXTABLE(3b,8b) - _ASM_EXTABLE(4b,9b) -ENDPROC(xen_failsafe_callback) - -BUILD_INTERRUPT3(xen_hvm_callback_vector, HYPERVISOR_CALLBACK_VECTOR, - xen_evtchn_do_upcall) - -#endif /* CONFIG_XEN */ - -#if IS_ENABLED(CONFIG_HYPERV) - -BUILD_INTERRUPT3(hyperv_callback_vector, HYPERVISOR_CALLBACK_VECTOR, - hyperv_vector_handler) - -#endif /* CONFIG_HYPERV */ - -#ifdef CONFIG_FUNCTION_TRACER -#ifdef CONFIG_DYNAMIC_FTRACE - -ENTRY(mcount) - ret -END(mcount) - -ENTRY(ftrace_caller) - pushl %eax - pushl %ecx - pushl %edx - pushl $0 /* Pass NULL as regs pointer */ - movl 4*4(%esp), %eax - movl 0x4(%ebp), %edx - movl function_trace_op, %ecx - subl $MCOUNT_INSN_SIZE, %eax - -.globl ftrace_call -ftrace_call: - call ftrace_stub - - addl $4,%esp /* skip NULL pointer */ - popl %edx - popl %ecx - popl %eax -ftrace_ret: -#ifdef CONFIG_FUNCTION_GRAPH_TRACER -.globl ftrace_graph_call -ftrace_graph_call: - jmp ftrace_stub -#endif - -.globl ftrace_stub -ftrace_stub: - ret -END(ftrace_caller) - -ENTRY(ftrace_regs_caller) - pushf /* push flags before compare (in cs location) */ - - /* - * i386 does not save SS and ESP when coming from kernel. - * Instead, to get sp, ®s->sp is used (see ptrace.h). - * Unfortunately, that means eflags must be at the same location - * as the current return ip is. We move the return ip into the - * ip location, and move flags into the return ip location. - */ - pushl 4(%esp) /* save return ip into ip slot */ - - pushl $0 /* Load 0 into orig_ax */ - pushl %gs - pushl %fs - pushl %es - pushl %ds - pushl %eax - pushl %ebp - pushl %edi - pushl %esi - pushl %edx - pushl %ecx - pushl %ebx - - movl 13*4(%esp), %eax /* Get the saved flags */ - movl %eax, 14*4(%esp) /* Move saved flags into regs->flags location */ - /* clobbering return ip */ - movl $__KERNEL_CS,13*4(%esp) - - movl 12*4(%esp), %eax /* Load ip (1st parameter) */ - subl $MCOUNT_INSN_SIZE, %eax /* Adjust ip */ - movl 0x4(%ebp), %edx /* Load parent ip (2nd parameter) */ - movl function_trace_op, %ecx /* Save ftrace_pos in 3rd parameter */ - pushl %esp /* Save pt_regs as 4th parameter */ - -GLOBAL(ftrace_regs_call) - call ftrace_stub - - addl $4, %esp /* Skip pt_regs */ - movl 14*4(%esp), %eax /* Move flags back into cs */ - movl %eax, 13*4(%esp) /* Needed to keep addl from modifying flags */ - movl 12*4(%esp), %eax /* Get return ip from regs->ip */ - movl %eax, 14*4(%esp) /* Put return ip back for ret */ - - popl %ebx - popl %ecx - popl %edx - popl %esi - popl %edi - popl %ebp - popl %eax - popl %ds - popl %es - popl %fs - popl %gs - addl $8, %esp /* Skip orig_ax and ip */ - popf /* Pop flags at end (no addl to corrupt flags) */ - jmp ftrace_ret - - popf - jmp ftrace_stub -#else /* ! CONFIG_DYNAMIC_FTRACE */ - -ENTRY(mcount) - cmpl $__PAGE_OFFSET, %esp - jb ftrace_stub /* Paging not enabled yet? */ - - cmpl $ftrace_stub, ftrace_trace_function - jnz trace -#ifdef CONFIG_FUNCTION_GRAPH_TRACER - cmpl $ftrace_stub, ftrace_graph_return - jnz ftrace_graph_caller - - cmpl $ftrace_graph_entry_stub, ftrace_graph_entry - jnz ftrace_graph_caller -#endif -.globl ftrace_stub -ftrace_stub: - ret - - /* taken from glibc */ -trace: - pushl %eax - pushl %ecx - pushl %edx - movl 0xc(%esp), %eax - movl 0x4(%ebp), %edx - subl $MCOUNT_INSN_SIZE, %eax - - call *ftrace_trace_function - - popl %edx - popl %ecx - popl %eax - jmp ftrace_stub -END(mcount) -#endif /* CONFIG_DYNAMIC_FTRACE */ -#endif /* CONFIG_FUNCTION_TRACER */ - -#ifdef CONFIG_FUNCTION_GRAPH_TRACER -ENTRY(ftrace_graph_caller) - pushl %eax - pushl %ecx - pushl %edx - movl 0xc(%esp), %eax - lea 0x4(%ebp), %edx - movl (%ebp), %ecx - subl $MCOUNT_INSN_SIZE, %eax - call prepare_ftrace_return - popl %edx - popl %ecx - popl %eax - ret -END(ftrace_graph_caller) - -.globl return_to_handler -return_to_handler: - pushl %eax - pushl %edx - movl %ebp, %eax - call ftrace_return_to_handler - movl %eax, %ecx - popl %edx - popl %eax - jmp *%ecx -#endif - -#ifdef CONFIG_TRACING -ENTRY(trace_page_fault) - RING0_EC_FRAME - ASM_CLAC - pushl_cfi $trace_do_page_fault - jmp error_code - CFI_ENDPROC -END(trace_page_fault) -#endif - -ENTRY(page_fault) - RING0_EC_FRAME - ASM_CLAC - pushl_cfi $do_page_fault - ALIGN -error_code: - /* the function address is in %gs's slot on the stack */ - pushl_cfi %fs - /*CFI_REL_OFFSET fs, 0*/ - pushl_cfi %es - /*CFI_REL_OFFSET es, 0*/ - pushl_cfi %ds - /*CFI_REL_OFFSET ds, 0*/ - pushl_cfi_reg eax - pushl_cfi_reg ebp - pushl_cfi_reg edi - pushl_cfi_reg esi - pushl_cfi_reg edx - pushl_cfi_reg ecx - pushl_cfi_reg ebx - cld - movl $(__KERNEL_PERCPU), %ecx - movl %ecx, %fs - UNWIND_ESPFIX_STACK - GS_TO_REG %ecx - movl PT_GS(%esp), %edi # get the function address - movl PT_ORIG_EAX(%esp), %edx # get the error code - movl $-1, PT_ORIG_EAX(%esp) # no syscall to restart - REG_TO_PTGS %ecx - SET_KERNEL_GS %ecx - movl $(__USER_DS), %ecx - movl %ecx, %ds - movl %ecx, %es - TRACE_IRQS_OFF - movl %esp,%eax # pt_regs pointer - call *%edi - jmp ret_from_exception - CFI_ENDPROC -END(page_fault) - -/* - * Debug traps and NMI can happen at the one SYSENTER instruction - * that sets up the real kernel stack. Check here, since we can't - * allow the wrong stack to be used. - * - * "TSS_sysenter_sp0+12" is because the NMI/debug handler will have - * already pushed 3 words if it hits on the sysenter instruction: - * eflags, cs and eip. - * - * We just load the right stack, and push the three (known) values - * by hand onto the new stack - while updating the return eip past - * the instruction that would have done it for sysenter. - */ -.macro FIX_STACK offset ok label - cmpw $__KERNEL_CS, 4(%esp) - jne \ok -\label: - movl TSS_sysenter_sp0 + \offset(%esp), %esp - CFI_DEF_CFA esp, 0 - CFI_UNDEFINED eip - pushfl_cfi - pushl_cfi $__KERNEL_CS - pushl_cfi $sysenter_past_esp - CFI_REL_OFFSET eip, 0 -.endm - -ENTRY(debug) - RING0_INT_FRAME - ASM_CLAC - cmpl $ia32_sysenter_target,(%esp) - jne debug_stack_correct - FIX_STACK 12, debug_stack_correct, debug_esp_fix_insn -debug_stack_correct: - pushl_cfi $-1 # mark this as an int - SAVE_ALL - TRACE_IRQS_OFF - xorl %edx,%edx # error code 0 - movl %esp,%eax # pt_regs pointer - call do_debug - jmp ret_from_exception - CFI_ENDPROC -END(debug) - -/* - * NMI is doubly nasty. It can happen _while_ we're handling - * a debug fault, and the debug fault hasn't yet been able to - * clear up the stack. So we first check whether we got an - * NMI on the sysenter entry path, but after that we need to - * check whether we got an NMI on the debug path where the debug - * fault happened on the sysenter path. - */ -ENTRY(nmi) - RING0_INT_FRAME - ASM_CLAC -#ifdef CONFIG_X86_ESPFIX32 - pushl_cfi %eax - movl %ss, %eax - cmpw $__ESPFIX_SS, %ax - popl_cfi %eax - je nmi_espfix_stack -#endif - cmpl $ia32_sysenter_target,(%esp) - je nmi_stack_fixup - pushl_cfi %eax - movl %esp,%eax - /* Do not access memory above the end of our stack page, - * it might not exist. - */ - andl $(THREAD_SIZE-1),%eax - cmpl $(THREAD_SIZE-20),%eax - popl_cfi %eax - jae nmi_stack_correct - cmpl $ia32_sysenter_target,12(%esp) - je nmi_debug_stack_check -nmi_stack_correct: - /* We have a RING0_INT_FRAME here */ - pushl_cfi %eax - SAVE_ALL - xorl %edx,%edx # zero error code - movl %esp,%eax # pt_regs pointer - call do_nmi - jmp restore_all_notrace - CFI_ENDPROC - -nmi_stack_fixup: - RING0_INT_FRAME - FIX_STACK 12, nmi_stack_correct, 1 - jmp nmi_stack_correct - -nmi_debug_stack_check: - /* We have a RING0_INT_FRAME here */ - cmpw $__KERNEL_CS,16(%esp) - jne nmi_stack_correct - cmpl $debug,(%esp) - jb nmi_stack_correct - cmpl $debug_esp_fix_insn,(%esp) - ja nmi_stack_correct - FIX_STACK 24, nmi_stack_correct, 1 - jmp nmi_stack_correct - -#ifdef CONFIG_X86_ESPFIX32 -nmi_espfix_stack: - /* We have a RING0_INT_FRAME here. - * - * create the pointer to lss back - */ - pushl_cfi %ss - pushl_cfi %esp - addl $4, (%esp) - /* copy the iret frame of 12 bytes */ - .rept 3 - pushl_cfi 16(%esp) - .endr - pushl_cfi %eax - SAVE_ALL - FIXUP_ESPFIX_STACK # %eax == %esp - xorl %edx,%edx # zero error code - call do_nmi - RESTORE_REGS - lss 12+4(%esp), %esp # back to espfix stack - CFI_ADJUST_CFA_OFFSET -24 - jmp irq_return -#endif - CFI_ENDPROC -END(nmi) - -ENTRY(int3) - RING0_INT_FRAME - ASM_CLAC - pushl_cfi $-1 # mark this as an int - SAVE_ALL - TRACE_IRQS_OFF - xorl %edx,%edx # zero error code - movl %esp,%eax # pt_regs pointer - call do_int3 - jmp ret_from_exception - CFI_ENDPROC -END(int3) - -ENTRY(general_protection) - RING0_EC_FRAME - pushl_cfi $do_general_protection - jmp error_code - CFI_ENDPROC -END(general_protection) - -#ifdef CONFIG_KVM_GUEST -ENTRY(async_page_fault) - RING0_EC_FRAME - ASM_CLAC - pushl_cfi $do_async_page_fault - jmp error_code - CFI_ENDPROC -END(async_page_fault) -#endif - diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S index 7e429c9..0e2d96f 100644 --- a/arch/x86/kernel/head_32.S +++ b/arch/x86/kernel/head_32.S @@ -557,7 +557,7 @@ early_idt_handler_common: cld cmpl $2,(%esp) # X86_TRAP_NMI - je is_nmi # Ignore NMI + je .Lis_nmi # Ignore NMI cmpl $2,%ss:early_recursion_flag je hlt_loop @@ -610,7 +610,7 @@ ex_entry: pop %ecx pop %eax decl %ss:early_recursion_flag -is_nmi: +.Lis_nmi: addl $8,%esp /* drop vector number and error code */ iret ENDPROC(early_idt_handler_common) diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S index df7e780..e5c27f7 100644 --- a/arch/x86/kernel/head_64.S +++ b/arch/x86/kernel/head_64.S @@ -346,7 +346,7 @@ early_idt_handler_common: cld cmpl $2,(%rsp) # X86_TRAP_NMI - je is_nmi # Ignore NMI + je .Lis_nmi # Ignore NMI cmpl $2,early_recursion_flag(%rip) jz 1f @@ -411,7 +411,7 @@ early_idt_handler_common: popq %rcx popq %rax decl early_recursion_flag(%rip) -is_nmi: +.Lis_nmi: addq $16,%rsp # drop vector number and error code INTERRUPT_RETURN ENDPROC(early_idt_handler_common) diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c index 3acbff4..10757d0 100644 --- a/arch/x86/kernel/hpet.c +++ b/arch/x86/kernel/hpet.c @@ -12,6 +12,7 @@ #include <linux/pm.h> #include <linux/io.h> +#include <asm/irqdomain.h> #include <asm/fixmap.h> #include <asm/hpet.h> #include <asm/time.h> @@ -305,8 +306,6 @@ static void hpet_legacy_clockevent_register(void) printk(KERN_DEBUG "hpet clockevent registered\n"); } -static int hpet_setup_msi_irq(unsigned int irq); - static void hpet_set_mode(enum clock_event_mode mode, struct clock_event_device *evt, int timer) { @@ -357,7 +356,7 @@ static void hpet_set_mode(enum clock_event_mode mode, hpet_enable_legacy_int(); } else { struct hpet_dev *hdev = EVT_TO_HPET_DEV(evt); - hpet_setup_msi_irq(hdev->irq); + irq_domain_activate_irq(irq_get_irq_data(hdev->irq)); disable_irq(hdev->irq); irq_set_affinity(hdev->irq, cpumask_of(hdev->cpu)); enable_irq(hdev->irq); @@ -423,6 +422,7 @@ static int hpet_legacy_next_event(unsigned long delta, static DEFINE_PER_CPU(struct hpet_dev *, cpu_hpet_dev); static struct hpet_dev *hpet_devs; +static struct irq_domain *hpet_domain; void hpet_msi_unmask(struct irq_data *data) { @@ -473,31 +473,6 @@ static int hpet_msi_next_event(unsigned long delta, return hpet_next_event(delta, evt, hdev->num); } -static int hpet_setup_msi_irq(unsigned int irq) -{ - if (x86_msi.setup_hpet_msi(irq, hpet_blockid)) { - irq_free_hwirq(irq); - return -EINVAL; - } - return 0; -} - -static int hpet_assign_irq(struct hpet_dev *dev) -{ - unsigned int irq = irq_alloc_hwirq(-1); - - if (!irq) - return -EINVAL; - - irq_set_handler_data(irq, dev); - - if (hpet_setup_msi_irq(irq)) - return -EINVAL; - - dev->irq = irq; - return 0; -} - static irqreturn_t hpet_interrupt_handler(int irq, void *data) { struct hpet_dev *dev = (struct hpet_dev *)data; @@ -540,9 +515,6 @@ static void init_one_hpet_msi_clockevent(struct hpet_dev *hdev, int cpu) if (!(hdev->flags & HPET_DEV_VALID)) return; - if (hpet_setup_msi_irq(hdev->irq)) - return; - hdev->cpu = cpu; per_cpu(cpu_hpet_dev, cpu) = hdev; evt->name = hdev->name; @@ -574,7 +546,7 @@ static void hpet_msi_capability_lookup(unsigned int start_timer) unsigned int id; unsigned int num_timers; unsigned int num_timers_used = 0; - int i; + int i, irq; if (hpet_msi_disable) return; @@ -587,6 +559,10 @@ static void hpet_msi_capability_lookup(unsigned int start_timer) num_timers++; /* Value read out starts from 0 */ hpet_print_config(); + hpet_domain = hpet_create_irq_domain(hpet_blockid); + if (!hpet_domain) + return; + hpet_devs = kzalloc(sizeof(struct hpet_dev) * num_timers, GFP_KERNEL); if (!hpet_devs) return; @@ -604,12 +580,14 @@ static void hpet_msi_capability_lookup(unsigned int start_timer) hdev->flags = 0; if (cfg & HPET_TN_PERIODIC_CAP) hdev->flags |= HPET_DEV_PERI_CAP; + sprintf(hdev->name, "hpet%d", i); hdev->num = i; - sprintf(hdev->name, "hpet%d", i); - if (hpet_assign_irq(hdev)) + irq = hpet_assign_irq(hpet_domain, hdev, hdev->num); + if (irq <= 0) continue; + hdev->irq = irq; hdev->flags |= HPET_DEV_FSB_CAP; hdev->flags |= HPET_DEV_VALID; num_timers_used++; @@ -709,10 +687,6 @@ static int hpet_cpuhp_notify(struct notifier_block *n, } #else -static int hpet_setup_msi_irq(unsigned int irq) -{ - return 0; -} static void hpet_msi_capability_lookup(unsigned int start_timer) { return; diff --git a/arch/x86/kernel/i8259.c b/arch/x86/kernel/i8259.c index e7cc537..16cb827 100644 --- a/arch/x86/kernel/i8259.c +++ b/arch/x86/kernel/i8259.c @@ -329,8 +329,8 @@ static void init_8259A(int auto_eoi) */ outb_pic(0x11, PIC_MASTER_CMD); /* ICW1: select 8259A-1 init */ - /* ICW2: 8259A-1 IR0-7 mapped to 0x30-0x37 */ - outb_pic(IRQ0_VECTOR, PIC_MASTER_IMR); + /* ICW2: 8259A-1 IR0-7 mapped to ISA_IRQ_VECTOR(0) */ + outb_pic(ISA_IRQ_VECTOR(0), PIC_MASTER_IMR); /* 8259A-1 (the master) has a slave on IR2 */ outb_pic(1U << PIC_CASCADE_IR, PIC_MASTER_IMR); @@ -342,8 +342,8 @@ static void init_8259A(int auto_eoi) outb_pic(0x11, PIC_SLAVE_CMD); /* ICW1: select 8259A-2 init */ - /* ICW2: 8259A-2 IR0-7 mapped to IRQ8_VECTOR */ - outb_pic(IRQ8_VECTOR, PIC_SLAVE_IMR); + /* ICW2: 8259A-2 IR0-7 mapped to ISA_IRQ_VECTOR(8) */ + outb_pic(ISA_IRQ_VECTOR(8), PIC_SLAVE_IMR); /* 8259A-2 is a slave on master's IR2 */ outb_pic(PIC_CASCADE_IR, PIC_SLAVE_IMR); /* (slave's support for AEOI in flat mode is to be investigated) */ diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c index e5952c2..88b36648 100644 --- a/arch/x86/kernel/irq.c +++ b/arch/x86/kernel/irq.c @@ -22,6 +22,12 @@ #define CREATE_TRACE_POINTS #include <asm/trace/irq_vectors.h> +DEFINE_PER_CPU_SHARED_ALIGNED(irq_cpustat_t, irq_stat); +EXPORT_PER_CPU_SYMBOL(irq_stat); + +DEFINE_PER_CPU(struct pt_regs *, irq_regs); +EXPORT_PER_CPU_SYMBOL(irq_regs); + atomic_t irq_err_count; /* Function pointer for generic interrupt vector handling */ @@ -116,6 +122,12 @@ int arch_show_interrupts(struct seq_file *p, int prec) seq_printf(p, "%10u ", irq_stats(j)->irq_threshold_count); seq_puts(p, " Threshold APIC interrupts\n"); #endif +#ifdef CONFIG_X86_MCE_AMD + seq_printf(p, "%*s: ", prec, "DFR"); + for_each_online_cpu(j) + seq_printf(p, "%10u ", irq_stats(j)->irq_deferred_error_count); + seq_puts(p, " Deferred Error APIC interrupts\n"); +#endif #ifdef CONFIG_X86_MCE seq_printf(p, "%*s: ", prec, "MCE"); for_each_online_cpu(j) @@ -136,6 +148,18 @@ int arch_show_interrupts(struct seq_file *p, int prec) #if defined(CONFIG_X86_IO_APIC) seq_printf(p, "%*s: %10u\n", prec, "MIS", atomic_read(&irq_mis_count)); #endif +#ifdef CONFIG_HAVE_KVM + seq_printf(p, "%*s: ", prec, "PIN"); + for_each_online_cpu(j) + seq_printf(p, "%10u ", irq_stats(j)->kvm_posted_intr_ipis); + seq_puts(p, " Posted-interrupt notification event\n"); + + seq_printf(p, "%*s: ", prec, "PIW"); + for_each_online_cpu(j) + seq_printf(p, "%10u ", + irq_stats(j)->kvm_posted_intr_wakeup_ipis); + seq_puts(p, " Posted-interrupt wakeup event\n"); +#endif return 0; } @@ -192,8 +216,7 @@ __visible unsigned int __irq_entry do_IRQ(struct pt_regs *regs) unsigned vector = ~regs->orig_ax; unsigned irq; - irq_enter(); - exit_idle(); + entering_irq(); irq = __this_cpu_read(vector_irq[vector]); @@ -209,7 +232,7 @@ __visible unsigned int __irq_entry do_IRQ(struct pt_regs *regs) } } - irq_exit(); + exiting_irq(); set_irq_regs(old_regs); return 1; @@ -237,6 +260,18 @@ __visible void smp_x86_platform_ipi(struct pt_regs *regs) } #ifdef CONFIG_HAVE_KVM +static void dummy_handler(void) {} +static void (*kvm_posted_intr_wakeup_handler)(void) = dummy_handler; + +void kvm_set_posted_intr_wakeup_handler(void (*handler)(void)) +{ + if (handler) + kvm_posted_intr_wakeup_handler = handler; + else + kvm_posted_intr_wakeup_handler = dummy_handler; +} +EXPORT_SYMBOL_GPL(kvm_set_posted_intr_wakeup_handler); + /* * Handler for POSTED_INTERRUPT_VECTOR. */ @@ -244,16 +279,23 @@ __visible void smp_kvm_posted_intr_ipi(struct pt_regs *regs) { struct pt_regs *old_regs = set_irq_regs(regs); - ack_APIC_irq(); - - irq_enter(); - - exit_idle(); - + entering_ack_irq(); inc_irq_stat(kvm_posted_intr_ipis); + exiting_irq(); + set_irq_regs(old_regs); +} - irq_exit(); +/* + * Handler for POSTED_INTERRUPT_WAKEUP_VECTOR. + */ +__visible void smp_kvm_posted_intr_wakeup_ipi(struct pt_regs *regs) +{ + struct pt_regs *old_regs = set_irq_regs(regs); + entering_ack_irq(); + inc_irq_stat(kvm_posted_intr_wakeup_ipis); + kvm_posted_intr_wakeup_handler(); + exiting_irq(); set_irq_regs(old_regs); } #endif diff --git a/arch/x86/kernel/irq_32.c b/arch/x86/kernel/irq_32.c index f9fd86a..cd74f59 100644 --- a/arch/x86/kernel/irq_32.c +++ b/arch/x86/kernel/irq_32.c @@ -21,12 +21,6 @@ #include <asm/apic.h> -DEFINE_PER_CPU_SHARED_ALIGNED(irq_cpustat_t, irq_stat); -EXPORT_PER_CPU_SYMBOL(irq_stat); - -DEFINE_PER_CPU(struct pt_regs *, irq_regs); -EXPORT_PER_CPU_SYMBOL(irq_regs); - #ifdef CONFIG_DEBUG_STACKOVERFLOW int sysctl_panic_on_stackoverflow __read_mostly; diff --git a/arch/x86/kernel/irq_64.c b/arch/x86/kernel/irq_64.c index 394e643..bc4604e 100644 --- a/arch/x86/kernel/irq_64.c +++ b/arch/x86/kernel/irq_64.c @@ -20,12 +20,6 @@ #include <asm/idle.h> #include <asm/apic.h> -DEFINE_PER_CPU_SHARED_ALIGNED(irq_cpustat_t, irq_stat); -EXPORT_PER_CPU_SYMBOL(irq_stat); - -DEFINE_PER_CPU(struct pt_regs *, irq_regs); -EXPORT_PER_CPU_SYMBOL(irq_regs); - int sysctl_panic_on_stackoverflow; /* diff --git a/arch/x86/kernel/irq_work.c b/arch/x86/kernel/irq_work.c index 15d741d..dc5fa6a 100644 --- a/arch/x86/kernel/irq_work.c +++ b/arch/x86/kernel/irq_work.c @@ -10,12 +10,6 @@ #include <asm/apic.h> #include <asm/trace/irq_vectors.h> -static inline void irq_work_entering_irq(void) -{ - irq_enter(); - ack_APIC_irq(); -} - static inline void __smp_irq_work_interrupt(void) { inc_irq_stat(apic_irq_work_irqs); @@ -24,14 +18,14 @@ static inline void __smp_irq_work_interrupt(void) __visible void smp_irq_work_interrupt(struct pt_regs *regs) { - irq_work_entering_irq(); + ipi_entering_ack_irq(); __smp_irq_work_interrupt(); exiting_irq(); } __visible void smp_trace_irq_work_interrupt(struct pt_regs *regs) { - irq_work_entering_irq(); + ipi_entering_ack_irq(); trace_irq_work_entry(IRQ_WORK_VECTOR); __smp_irq_work_interrupt(); trace_irq_work_exit(IRQ_WORK_VECTOR); diff --git a/arch/x86/kernel/irqinit.c b/arch/x86/kernel/irqinit.c index cd10a64..a3a5e15 100644 --- a/arch/x86/kernel/irqinit.c +++ b/arch/x86/kernel/irqinit.c @@ -86,7 +86,7 @@ void __init init_IRQ(void) int i; /* - * On cpu 0, Assign IRQ0_VECTOR..IRQ15_VECTOR's to IRQ 0..15. + * On cpu 0, Assign ISA_IRQ_VECTOR(irq) to IRQ 0..15. * If these IRQ's are handled by legacy interrupt-controllers like PIC, * then this configuration will likely be static after the boot. If * these IRQ's are handled by more mordern controllers like IO-APIC, @@ -94,7 +94,7 @@ void __init init_IRQ(void) * irq's migrate etc. */ for (i = 0; i < nr_legacy_irqs(); i++) - per_cpu(vector_irq, 0)[IRQ0_VECTOR + i] = i; + per_cpu(vector_irq, 0)[ISA_IRQ_VECTOR(i)] = i; x86_init.irqs.intr_init(); } @@ -135,6 +135,10 @@ static void __init apic_intr_init(void) alloc_intr_gate(THRESHOLD_APIC_VECTOR, threshold_interrupt); #endif +#ifdef CONFIG_X86_MCE_AMD + alloc_intr_gate(DEFERRED_ERROR_VECTOR, deferred_error_interrupt); +#endif + #ifdef CONFIG_X86_LOCAL_APIC /* self generated IPI for local APIC timer */ alloc_intr_gate(LOCAL_TIMER_VECTOR, apic_timer_interrupt); @@ -144,6 +148,8 @@ static void __init apic_intr_init(void) #ifdef CONFIG_HAVE_KVM /* IPI for KVM to deliver posted interrupt */ alloc_intr_gate(POSTED_INTR_VECTOR, kvm_posted_intr_ipi); + /* IPI for KVM to deliver interrupt to wake up tasks */ + alloc_intr_gate(POSTED_INTR_WAKEUP_VECTOR, kvm_posted_intr_wakeup_ipi); #endif /* IPI vectors for APIC spurious and error interrupts */ diff --git a/arch/x86/kernel/machine_kexec_64.c b/arch/x86/kernel/machine_kexec_64.c index 415480d..11546b4 100644 --- a/arch/x86/kernel/machine_kexec_64.c +++ b/arch/x86/kernel/machine_kexec_64.c @@ -17,6 +17,7 @@ #include <linux/ftrace.h> #include <linux/io.h> #include <linux/suspend.h> +#include <linux/vmalloc.h> #include <asm/init.h> #include <asm/pgtable.h> diff --git a/arch/x86/kernel/mpparse.c b/arch/x86/kernel/mpparse.c index 2d2a237..30ca760 100644 --- a/arch/x86/kernel/mpparse.c +++ b/arch/x86/kernel/mpparse.c @@ -19,8 +19,8 @@ #include <linux/module.h> #include <linux/smp.h> #include <linux/pci.h> -#include <linux/irqdomain.h> +#include <asm/irqdomain.h> #include <asm/mtrr.h> #include <asm/mpspec.h> #include <asm/pgalloc.h> @@ -113,11 +113,6 @@ static void __init MP_bus_info(struct mpc_bus *m) pr_warn("Unknown bustype %s - ignoring\n", str); } -static struct irq_domain_ops mp_ioapic_irqdomain_ops = { - .map = mp_irqdomain_map, - .unmap = mp_irqdomain_unmap, -}; - static void __init MP_ioapic_info(struct mpc_ioapic *m) { struct ioapic_domain_cfg cfg = { diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c index c614dd4..58bcfb6 100644 --- a/arch/x86/kernel/paravirt.c +++ b/arch/x86/kernel/paravirt.c @@ -154,7 +154,9 @@ unsigned paravirt_patch_default(u8 type, u16 clobbers, void *insnbuf, ret = paravirt_patch_ident_64(insnbuf, len); else if (type == PARAVIRT_PATCH(pv_cpu_ops.iret) || +#ifdef CONFIG_X86_32 type == PARAVIRT_PATCH(pv_cpu_ops.irq_enable_sysexit) || +#endif type == PARAVIRT_PATCH(pv_cpu_ops.usergs_sysret32) || type == PARAVIRT_PATCH(pv_cpu_ops.usergs_sysret64)) /* If operation requires a jmp, then jmp */ @@ -371,7 +373,7 @@ __visible struct pv_cpu_ops pv_cpu_ops = { .load_sp0 = native_load_sp0, -#if defined(CONFIG_X86_32) || defined(CONFIG_IA32_EMULATION) +#if defined(CONFIG_X86_32) .irq_enable_sysexit = native_irq_enable_sysexit, #endif #ifdef CONFIG_X86_64 diff --git a/arch/x86/kernel/paravirt_patch_64.c b/arch/x86/kernel/paravirt_patch_64.c index a1fa867..8aa0558 100644 --- a/arch/x86/kernel/paravirt_patch_64.c +++ b/arch/x86/kernel/paravirt_patch_64.c @@ -55,7 +55,6 @@ unsigned native_patch(u8 type, u16 clobbers, void *ibuf, PATCH_SITE(pv_irq_ops, save_fl); PATCH_SITE(pv_irq_ops, irq_enable); PATCH_SITE(pv_irq_ops, irq_disable); - PATCH_SITE(pv_cpu_ops, irq_enable_sysexit); PATCH_SITE(pv_cpu_ops, usergs_sysret32); PATCH_SITE(pv_cpu_ops, usergs_sysret64); PATCH_SITE(pv_cpu_ops, swapgs); diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c index deff6518..c09c99c 100644 --- a/arch/x86/kernel/process_32.c +++ b/arch/x86/kernel/process_32.c @@ -303,13 +303,10 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p) arch_end_context_switch(next_p); /* - * Reload esp0, kernel_stack, and current_top_of_stack. This changes + * Reload esp0 and cpu_current_top_of_stack. This changes * current_thread_info(). */ load_sp0(tss, next); - this_cpu_write(kernel_stack, - (unsigned long)task_stack_page(next_p) + - THREAD_SIZE); this_cpu_write(cpu_current_top_of_stack, (unsigned long)task_stack_page(next_p) + THREAD_SIZE); diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c index c50e013..843f92e 100644 --- a/arch/x86/kernel/process_64.c +++ b/arch/x86/kernel/process_64.c @@ -410,9 +410,6 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p) /* Reload esp0 and ss1. This changes current_thread_info(). */ load_sp0(tss, next); - this_cpu_write(kernel_stack, - (unsigned long)task_stack_page(next_p) + THREAD_SIZE); - /* * Now maybe reload the debug registers and handle I/O bitmaps */ diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index cba8288..265a6fd 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -1224,8 +1224,7 @@ void __init setup_arch(char **cmdline_p) init_cpu_to_node(); init_apic_mappings(); - if (x86_io_apic_ops.init) - x86_io_apic_ops.init(); + io_apic_init_mappings(); kvm_guest_init(); diff --git a/arch/x86/kernel/smp.c b/arch/x86/kernel/smp.c index be8e1bd..15aaa69 100644 --- a/arch/x86/kernel/smp.c +++ b/arch/x86/kernel/smp.c @@ -170,8 +170,7 @@ static int smp_stop_nmi_callback(unsigned int val, struct pt_regs *regs) asmlinkage __visible void smp_reboot_interrupt(void) { - ack_APIC_irq(); - irq_enter(); + ipi_entering_ack_irq(); stop_this_cpu(NULL); irq_exit(); } @@ -265,12 +264,6 @@ __visible void smp_reschedule_interrupt(struct pt_regs *regs) */ } -static inline void smp_entering_irq(void) -{ - ack_APIC_irq(); - irq_enter(); -} - __visible void smp_trace_reschedule_interrupt(struct pt_regs *regs) { /* @@ -279,7 +272,7 @@ __visible void smp_trace_reschedule_interrupt(struct pt_regs *regs) * scheduler_ipi(). This is OK, since those functions are allowed * to nest. */ - smp_entering_irq(); + ipi_entering_ack_irq(); trace_reschedule_entry(RESCHEDULE_VECTOR); __smp_reschedule_interrupt(); trace_reschedule_exit(RESCHEDULE_VECTOR); @@ -297,14 +290,14 @@ static inline void __smp_call_function_interrupt(void) __visible void smp_call_function_interrupt(struct pt_regs *regs) { - smp_entering_irq(); + ipi_entering_ack_irq(); __smp_call_function_interrupt(); exiting_irq(); } __visible void smp_trace_call_function_interrupt(struct pt_regs *regs) { - smp_entering_irq(); + ipi_entering_ack_irq(); trace_call_function_entry(CALL_FUNCTION_VECTOR); __smp_call_function_interrupt(); trace_call_function_exit(CALL_FUNCTION_VECTOR); @@ -319,14 +312,14 @@ static inline void __smp_call_function_single_interrupt(void) __visible void smp_call_function_single_interrupt(struct pt_regs *regs) { - smp_entering_irq(); + ipi_entering_ack_irq(); __smp_call_function_single_interrupt(); exiting_irq(); } __visible void smp_trace_call_function_single_interrupt(struct pt_regs *regs) { - smp_entering_irq(); + ipi_entering_ack_irq(); trace_call_function_single_entry(CALL_FUNCTION_SINGLE_VECTOR); __smp_call_function_single_interrupt(); trace_call_function_single_exit(CALL_FUNCTION_SINGLE_VECTOR); diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index 6d4bfea..8add66b 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -515,6 +515,40 @@ void __inquire_remote_apic(int apicid) } /* + * The Multiprocessor Specification 1.4 (1997) example code suggests + * that there should be a 10ms delay between the BSP asserting INIT + * and de-asserting INIT, when starting a remote processor. + * But that slows boot and resume on modern processors, which include + * many cores and don't require that delay. + * + * Cmdline "init_cpu_udelay=" is available to over-ride this delay. + * Modern processor families are quirked to remove the delay entirely. + */ +#define UDELAY_10MS_DEFAULT 10000 + +static unsigned int init_udelay = UDELAY_10MS_DEFAULT; + +static int __init cpu_init_udelay(char *str) +{ + get_option(&str, &init_udelay); + + return 0; +} +early_param("cpu_init_udelay", cpu_init_udelay); + +static void __init smp_quirk_init_udelay(void) +{ + /* if cmdline changed it from default, leave it alone */ + if (init_udelay != UDELAY_10MS_DEFAULT) + return; + + /* if modern processor, use no delay */ + if (((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) && (boot_cpu_data.x86 == 6)) || + ((boot_cpu_data.x86_vendor == X86_VENDOR_AMD) && (boot_cpu_data.x86 >= 0xF))) + init_udelay = 0; +} + +/* * Poke the other CPU in the eye via NMI to wake it up. Remember that the normal * INIT, INIT, STARTUP sequence will reset the chip hard for us, and this * won't ... remember to clear down the APIC, etc later. @@ -556,7 +590,7 @@ wakeup_secondary_cpu_via_nmi(int apicid, unsigned long start_eip) static int wakeup_secondary_cpu_via_init(int phys_apicid, unsigned long start_eip) { - unsigned long send_status, accept_status = 0; + unsigned long send_status = 0, accept_status = 0; int maxlvt, num_starts, j; maxlvt = lapic_get_maxlvt(); @@ -584,7 +618,7 @@ wakeup_secondary_cpu_via_init(int phys_apicid, unsigned long start_eip) pr_debug("Waiting for send to finish...\n"); send_status = safe_apic_wait_icr_idle(); - mdelay(10); + udelay(init_udelay); pr_debug("Deasserting INIT\n"); @@ -652,6 +686,7 @@ wakeup_secondary_cpu_via_init(int phys_apicid, unsigned long start_eip) * Give the other CPU some time to accept the IPI. */ udelay(200); + if (maxlvt > 3) /* Due to the Pentium erratum 3AP. */ apic_write(APIC_ESR, 0); accept_status = (apic_read(APIC_ESR) & 0xEF); @@ -793,8 +828,6 @@ void common_cpu_up(unsigned int cpu, struct task_struct *idle) clear_tsk_thread_flag(idle, TIF_FORK); initial_gs = per_cpu_offset(cpu); #endif - per_cpu(kernel_stack, cpu) = - (unsigned long)task_stack_page(idle) + THREAD_SIZE; } /* @@ -1177,6 +1210,8 @@ void __init native_smp_prepare_cpus(unsigned int max_cpus) uv_system_init(); set_mtrr_aps_delayed_init(); + + smp_quirk_init_udelay(); } void arch_enable_nonboot_cpus_begin(void) diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index 36cb15b..f579192 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -73,8 +73,7 @@ gate_desc debug_idt_table[NR_VECTORS] __page_aligned_bss; #else #include <asm/processor-flags.h> #include <asm/setup.h> - -asmlinkage int system_call(void); +#include <asm/proto.h> #endif /* Must be page-aligned because the real IDT is used in a fixmap. */ @@ -769,18 +768,6 @@ dotraplinkage void do_spurious_interrupt_bug(struct pt_regs *regs, long error_code) { conditional_sti(regs); -#if 0 - /* No need to warn about this any longer. */ - pr_info("Ignoring P6 Local APIC Spurious Interrupt Bug...\n"); -#endif -} - -asmlinkage __visible void __attribute__((weak)) smp_thermal_interrupt(void) -{ -} - -asmlinkage __visible void __attribute__((weak)) smp_threshold_interrupt(void) -{ } dotraplinkage void @@ -906,13 +893,13 @@ void __init trap_init(void) set_bit(i, used_vectors); #ifdef CONFIG_IA32_EMULATION - set_system_intr_gate(IA32_SYSCALL_VECTOR, ia32_syscall); + set_system_intr_gate(IA32_SYSCALL_VECTOR, entry_INT80_compat); set_bit(IA32_SYSCALL_VECTOR, used_vectors); #endif #ifdef CONFIG_X86_32 - set_system_trap_gate(SYSCALL_VECTOR, &system_call); - set_bit(SYSCALL_VECTOR, used_vectors); + set_system_trap_gate(IA32_SYSCALL_VECTOR, entry_INT80_32); + set_bit(IA32_SYSCALL_VECTOR, used_vectors); #endif /* diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c index 234b072..3cee10a 100644 --- a/arch/x86/kernel/x86_init.c +++ b/arch/x86/kernel/x86_init.c @@ -111,11 +111,9 @@ EXPORT_SYMBOL_GPL(x86_platform); #if defined(CONFIG_PCI_MSI) struct x86_msi_ops x86_msi = { .setup_msi_irqs = native_setup_msi_irqs, - .compose_msi_msg = native_compose_msi_msg, .teardown_msi_irq = native_teardown_msi_irq, .teardown_msi_irqs = default_teardown_msi_irqs, .restore_msi_irqs = default_restore_msi_irqs, - .setup_hpet_msi = default_setup_hpet_msi, }; /* MSI arch specific hooks */ @@ -141,13 +139,6 @@ void arch_restore_msi_irqs(struct pci_dev *dev) #endif struct x86_io_apic_ops x86_io_apic_ops = { - .init = native_io_apic_init_mappings, .read = native_io_apic_read, - .write = native_io_apic_write, - .modify = native_io_apic_modify, .disable = native_disable_io_apic, - .print_entries = native_io_apic_print_entries, - .set_affinity = native_ioapic_set_affinity, - .setup_entry = native_setup_ioapic_entry, - .eoi_ioapic_pin = native_eoi_ioapic_pin, }; diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c index 27f8eea..f2dc08c 100644 --- a/arch/x86/lguest/boot.c +++ b/arch/x86/lguest/boot.c @@ -90,7 +90,7 @@ struct lguest_data lguest_data = { .noirq_iret = (u32)lguest_noirq_iret, .kernel_address = PAGE_OFFSET, .blocked_interrupts = { 1 }, /* Block timer interrupts */ - .syscall_vec = SYSCALL_VECTOR, + .syscall_vec = IA32_SYSCALL_VECTOR, }; /*G:037 @@ -866,7 +866,7 @@ static void __init lguest_init_IRQ(void) for (i = FIRST_EXTERNAL_VECTOR; i < FIRST_SYSTEM_VECTOR; i++) { /* Some systems map "vectors" to interrupts weirdly. Not us! */ __this_cpu_write(vector_irq[i], i - FIRST_EXTERNAL_VECTOR); - if (i != SYSCALL_VECTOR) + if (i != IA32_SYSCALL_VECTOR) set_intr_gate(i, irq_entries_start + 8 * (i - FIRST_EXTERNAL_VECTOR)); } diff --git a/arch/x86/lib/Makefile b/arch/x86/lib/Makefile index 1530afb..f258788 100644 --- a/arch/x86/lib/Makefile +++ b/arch/x86/lib/Makefile @@ -17,7 +17,6 @@ clean-files := inat-tables.c obj-$(CONFIG_SMP) += msr-smp.o cache-smp.o lib-y := delay.o misc.o cmdline.o -lib-y += thunk_$(BITS).o lib-y += usercopy_$(BITS).o usercopy.o getuser.o putuser.o lib-y += memcpy_$(BITS).o lib-$(CONFIG_RWSEM_XCHGADD_ALGORITHM) += rwsem.o @@ -40,6 +39,6 @@ else lib-y += csum-partial_64.o csum-copy_64.o csum-wrappers_64.o lib-y += clear_page_64.o copy_page_64.o lib-y += memmove_64.o memset_64.o - lib-y += copy_user_64.o copy_user_nocache_64.o + lib-y += copy_user_64.o lib-y += cmpxchg16b_emu.o endif diff --git a/arch/x86/lib/atomic64_386_32.S b/arch/x86/lib/atomic64_386_32.S index 00933d5..9b0ca8f 100644 --- a/arch/x86/lib/atomic64_386_32.S +++ b/arch/x86/lib/atomic64_386_32.S @@ -11,26 +11,23 @@ #include <linux/linkage.h> #include <asm/alternative-asm.h> -#include <asm/dwarf2.h> /* if you want SMP support, implement these with real spinlocks */ .macro LOCK reg - pushfl_cfi + pushfl cli .endm .macro UNLOCK reg - popfl_cfi + popfl .endm #define BEGIN(op) \ .macro endp; \ - CFI_ENDPROC; \ ENDPROC(atomic64_##op##_386); \ .purgem endp; \ .endm; \ ENTRY(atomic64_##op##_386); \ - CFI_STARTPROC; \ LOCK v; #define ENDP endp diff --git a/arch/x86/lib/atomic64_cx8_32.S b/arch/x86/lib/atomic64_cx8_32.S index 082a851..db3ae854 100644 --- a/arch/x86/lib/atomic64_cx8_32.S +++ b/arch/x86/lib/atomic64_cx8_32.S @@ -11,7 +11,6 @@ #include <linux/linkage.h> #include <asm/alternative-asm.h> -#include <asm/dwarf2.h> .macro read64 reg movl %ebx, %eax @@ -22,16 +21,11 @@ .endm ENTRY(atomic64_read_cx8) - CFI_STARTPROC - read64 %ecx ret - CFI_ENDPROC ENDPROC(atomic64_read_cx8) ENTRY(atomic64_set_cx8) - CFI_STARTPROC - 1: /* we don't need LOCK_PREFIX since aligned 64-bit writes * are atomic on 586 and newer */ @@ -39,28 +33,23 @@ ENTRY(atomic64_set_cx8) jne 1b ret - CFI_ENDPROC ENDPROC(atomic64_set_cx8) ENTRY(atomic64_xchg_cx8) - CFI_STARTPROC - 1: LOCK_PREFIX cmpxchg8b (%esi) jne 1b ret - CFI_ENDPROC ENDPROC(atomic64_xchg_cx8) .macro addsub_return func ins insc ENTRY(atomic64_\func\()_return_cx8) - CFI_STARTPROC - pushl_cfi_reg ebp - pushl_cfi_reg ebx - pushl_cfi_reg esi - pushl_cfi_reg edi + pushl %ebp + pushl %ebx + pushl %esi + pushl %edi movl %eax, %esi movl %edx, %edi @@ -79,12 +68,11 @@ ENTRY(atomic64_\func\()_return_cx8) 10: movl %ebx, %eax movl %ecx, %edx - popl_cfi_reg edi - popl_cfi_reg esi - popl_cfi_reg ebx - popl_cfi_reg ebp + popl %edi + popl %esi + popl %ebx + popl %ebp ret - CFI_ENDPROC ENDPROC(atomic64_\func\()_return_cx8) .endm @@ -93,8 +81,7 @@ addsub_return sub sub sbb .macro incdec_return func ins insc ENTRY(atomic64_\func\()_return_cx8) - CFI_STARTPROC - pushl_cfi_reg ebx + pushl %ebx read64 %esi 1: @@ -109,9 +96,8 @@ ENTRY(atomic64_\func\()_return_cx8) 10: movl %ebx, %eax movl %ecx, %edx - popl_cfi_reg ebx + popl %ebx ret - CFI_ENDPROC ENDPROC(atomic64_\func\()_return_cx8) .endm @@ -119,8 +105,7 @@ incdec_return inc add adc incdec_return dec sub sbb ENTRY(atomic64_dec_if_positive_cx8) - CFI_STARTPROC - pushl_cfi_reg ebx + pushl %ebx read64 %esi 1: @@ -136,18 +121,16 @@ ENTRY(atomic64_dec_if_positive_cx8) 2: movl %ebx, %eax movl %ecx, %edx - popl_cfi_reg ebx + popl %ebx ret - CFI_ENDPROC ENDPROC(atomic64_dec_if_positive_cx8) ENTRY(atomic64_add_unless_cx8) - CFI_STARTPROC - pushl_cfi_reg ebp - pushl_cfi_reg ebx + pushl %ebp + pushl %ebx /* these just push these two parameters on the stack */ - pushl_cfi_reg edi - pushl_cfi_reg ecx + pushl %edi + pushl %ecx movl %eax, %ebp movl %edx, %edi @@ -168,21 +151,18 @@ ENTRY(atomic64_add_unless_cx8) movl $1, %eax 3: addl $8, %esp - CFI_ADJUST_CFA_OFFSET -8 - popl_cfi_reg ebx - popl_cfi_reg ebp + popl %ebx + popl %ebp ret 4: cmpl %edx, 4(%esp) jne 2b xorl %eax, %eax jmp 3b - CFI_ENDPROC ENDPROC(atomic64_add_unless_cx8) ENTRY(atomic64_inc_not_zero_cx8) - CFI_STARTPROC - pushl_cfi_reg ebx + pushl %ebx read64 %esi 1: @@ -199,7 +179,6 @@ ENTRY(atomic64_inc_not_zero_cx8) movl $1, %eax 3: - popl_cfi_reg ebx + popl %ebx ret - CFI_ENDPROC ENDPROC(atomic64_inc_not_zero_cx8) diff --git a/arch/x86/lib/checksum_32.S b/arch/x86/lib/checksum_32.S index 9bc944a..c1e6232 100644 --- a/arch/x86/lib/checksum_32.S +++ b/arch/x86/lib/checksum_32.S @@ -26,7 +26,6 @@ */ #include <linux/linkage.h> -#include <asm/dwarf2.h> #include <asm/errno.h> #include <asm/asm.h> @@ -50,9 +49,8 @@ unsigned int csum_partial(const unsigned char * buff, int len, unsigned int sum) * alignment for the unrolled loop. */ ENTRY(csum_partial) - CFI_STARTPROC - pushl_cfi_reg esi - pushl_cfi_reg ebx + pushl %esi + pushl %ebx movl 20(%esp),%eax # Function arg: unsigned int sum movl 16(%esp),%ecx # Function arg: int len movl 12(%esp),%esi # Function arg: unsigned char *buff @@ -129,10 +127,9 @@ ENTRY(csum_partial) jz 8f roll $8, %eax 8: - popl_cfi_reg ebx - popl_cfi_reg esi + popl %ebx + popl %esi ret - CFI_ENDPROC ENDPROC(csum_partial) #else @@ -140,9 +137,8 @@ ENDPROC(csum_partial) /* Version for PentiumII/PPro */ ENTRY(csum_partial) - CFI_STARTPROC - pushl_cfi_reg esi - pushl_cfi_reg ebx + pushl %esi + pushl %ebx movl 20(%esp),%eax # Function arg: unsigned int sum movl 16(%esp),%ecx # Function arg: int len movl 12(%esp),%esi # Function arg: const unsigned char *buf @@ -249,10 +245,9 @@ ENTRY(csum_partial) jz 90f roll $8, %eax 90: - popl_cfi_reg ebx - popl_cfi_reg esi + popl %ebx + popl %esi ret - CFI_ENDPROC ENDPROC(csum_partial) #endif @@ -287,12 +282,10 @@ unsigned int csum_partial_copy_generic (const char *src, char *dst, #define FP 12 ENTRY(csum_partial_copy_generic) - CFI_STARTPROC subl $4,%esp - CFI_ADJUST_CFA_OFFSET 4 - pushl_cfi_reg edi - pushl_cfi_reg esi - pushl_cfi_reg ebx + pushl %edi + pushl %esi + pushl %ebx movl ARGBASE+16(%esp),%eax # sum movl ARGBASE+12(%esp),%ecx # len movl ARGBASE+4(%esp),%esi # src @@ -401,12 +394,11 @@ DST( movb %cl, (%edi) ) .previous - popl_cfi_reg ebx - popl_cfi_reg esi - popl_cfi_reg edi - popl_cfi %ecx # equivalent to addl $4,%esp + popl %ebx + popl %esi + popl %edi + popl %ecx # equivalent to addl $4,%esp ret - CFI_ENDPROC ENDPROC(csum_partial_copy_generic) #else @@ -426,10 +418,9 @@ ENDPROC(csum_partial_copy_generic) #define ARGBASE 12 ENTRY(csum_partial_copy_generic) - CFI_STARTPROC - pushl_cfi_reg ebx - pushl_cfi_reg edi - pushl_cfi_reg esi + pushl %ebx + pushl %edi + pushl %esi movl ARGBASE+4(%esp),%esi #src movl ARGBASE+8(%esp),%edi #dst movl ARGBASE+12(%esp),%ecx #len @@ -489,11 +480,10 @@ DST( movb %dl, (%edi) ) jmp 7b .previous - popl_cfi_reg esi - popl_cfi_reg edi - popl_cfi_reg ebx + popl %esi + popl %edi + popl %ebx ret - CFI_ENDPROC ENDPROC(csum_partial_copy_generic) #undef ROUND diff --git a/arch/x86/lib/clear_page_64.S b/arch/x86/lib/clear_page_64.S index e67e579..a2fe51b 100644 --- a/arch/x86/lib/clear_page_64.S +++ b/arch/x86/lib/clear_page_64.S @@ -1,5 +1,4 @@ #include <linux/linkage.h> -#include <asm/dwarf2.h> #include <asm/cpufeature.h> #include <asm/alternative-asm.h> @@ -15,7 +14,6 @@ * %rdi - page */ ENTRY(clear_page) - CFI_STARTPROC ALTERNATIVE_2 "jmp clear_page_orig", "", X86_FEATURE_REP_GOOD, \ "jmp clear_page_c_e", X86_FEATURE_ERMS @@ -24,11 +22,9 @@ ENTRY(clear_page) xorl %eax,%eax rep stosq ret - CFI_ENDPROC ENDPROC(clear_page) ENTRY(clear_page_orig) - CFI_STARTPROC xorl %eax,%eax movl $4096/64,%ecx @@ -48,14 +44,11 @@ ENTRY(clear_page_orig) jnz .Lloop nop ret - CFI_ENDPROC ENDPROC(clear_page_orig) ENTRY(clear_page_c_e) - CFI_STARTPROC movl $4096,%ecx xorl %eax,%eax rep stosb ret - CFI_ENDPROC ENDPROC(clear_page_c_e) diff --git a/arch/x86/lib/cmpxchg16b_emu.S b/arch/x86/lib/cmpxchg16b_emu.S index 40a1725..9b33024 100644 --- a/arch/x86/lib/cmpxchg16b_emu.S +++ b/arch/x86/lib/cmpxchg16b_emu.S @@ -6,7 +6,6 @@ * */ #include <linux/linkage.h> -#include <asm/dwarf2.h> #include <asm/percpu.h> .text @@ -21,7 +20,6 @@ * %al : Operation successful */ ENTRY(this_cpu_cmpxchg16b_emu) -CFI_STARTPROC # # Emulate 'cmpxchg16b %gs:(%rsi)' except we return the result in %al not @@ -32,7 +30,7 @@ CFI_STARTPROC # *atomic* on a single cpu (as provided by the this_cpu_xx class of # macros). # - pushfq_cfi + pushfq cli cmpq PER_CPU_VAR((%rsi)), %rax @@ -43,17 +41,13 @@ CFI_STARTPROC movq %rbx, PER_CPU_VAR((%rsi)) movq %rcx, PER_CPU_VAR(8(%rsi)) - CFI_REMEMBER_STATE - popfq_cfi + popfq mov $1, %al ret - CFI_RESTORE_STATE .Lnot_same: - popfq_cfi + popfq xor %al,%al ret -CFI_ENDPROC - ENDPROC(this_cpu_cmpxchg16b_emu) diff --git a/arch/x86/lib/cmpxchg8b_emu.S b/arch/x86/lib/cmpxchg8b_emu.S index b4807fce..ad53497 100644 --- a/arch/x86/lib/cmpxchg8b_emu.S +++ b/arch/x86/lib/cmpxchg8b_emu.S @@ -7,7 +7,6 @@ */ #include <linux/linkage.h> -#include <asm/dwarf2.h> .text @@ -20,14 +19,13 @@ * %ecx : high 32 bits of new value */ ENTRY(cmpxchg8b_emu) -CFI_STARTPROC # # Emulate 'cmpxchg8b (%esi)' on UP except we don't # set the whole ZF thing (caller will just compare # eax:edx with the expected value) # - pushfl_cfi + pushfl cli cmpl (%esi), %eax @@ -38,18 +36,15 @@ CFI_STARTPROC movl %ebx, (%esi) movl %ecx, 4(%esi) - CFI_REMEMBER_STATE - popfl_cfi + popfl ret - CFI_RESTORE_STATE .Lnot_same: movl (%esi), %eax .Lhalf_same: movl 4(%esi), %edx - popfl_cfi + popfl ret -CFI_ENDPROC ENDPROC(cmpxchg8b_emu) diff --git a/arch/x86/lib/copy_page_64.S b/arch/x86/lib/copy_page_64.S index 8239dbc..009f982 100644 --- a/arch/x86/lib/copy_page_64.S +++ b/arch/x86/lib/copy_page_64.S @@ -1,7 +1,6 @@ /* Written 2003 by Andi Kleen, based on a kernel by Evandro Menezes */ #include <linux/linkage.h> -#include <asm/dwarf2.h> #include <asm/cpufeature.h> #include <asm/alternative-asm.h> @@ -13,22 +12,16 @@ */ ALIGN ENTRY(copy_page) - CFI_STARTPROC ALTERNATIVE "jmp copy_page_regs", "", X86_FEATURE_REP_GOOD movl $4096/8, %ecx rep movsq ret - CFI_ENDPROC ENDPROC(copy_page) ENTRY(copy_page_regs) - CFI_STARTPROC subq $2*8, %rsp - CFI_ADJUST_CFA_OFFSET 2*8 movq %rbx, (%rsp) - CFI_REL_OFFSET rbx, 0 movq %r12, 1*8(%rsp) - CFI_REL_OFFSET r12, 1*8 movl $(4096/64)-5, %ecx .p2align 4 @@ -87,11 +80,7 @@ ENTRY(copy_page_regs) jnz .Loop2 movq (%rsp), %rbx - CFI_RESTORE rbx movq 1*8(%rsp), %r12 - CFI_RESTORE r12 addq $2*8, %rsp - CFI_ADJUST_CFA_OFFSET -2*8 ret - CFI_ENDPROC ENDPROC(copy_page_regs) diff --git a/arch/x86/lib/copy_user_64.S b/arch/x86/lib/copy_user_64.S index fa997df..982ce34 100644 --- a/arch/x86/lib/copy_user_64.S +++ b/arch/x86/lib/copy_user_64.S @@ -7,7 +7,6 @@ */ #include <linux/linkage.h> -#include <asm/dwarf2.h> #include <asm/current.h> #include <asm/asm-offsets.h> #include <asm/thread_info.h> @@ -16,33 +15,8 @@ #include <asm/asm.h> #include <asm/smap.h> - .macro ALIGN_DESTINATION - /* check for bad alignment of destination */ - movl %edi,%ecx - andl $7,%ecx - jz 102f /* already aligned */ - subl $8,%ecx - negl %ecx - subl %ecx,%edx -100: movb (%rsi),%al -101: movb %al,(%rdi) - incq %rsi - incq %rdi - decl %ecx - jnz 100b -102: - .section .fixup,"ax" -103: addl %ecx,%edx /* ecx is zerorest also */ - jmp copy_user_handle_tail - .previous - - _ASM_EXTABLE(100b,103b) - _ASM_EXTABLE(101b,103b) - .endm - /* Standard copy_to_user with segment limit checking */ ENTRY(_copy_to_user) - CFI_STARTPROC GET_THREAD_INFO(%rax) movq %rdi,%rcx addq %rdx,%rcx @@ -54,12 +28,10 @@ ENTRY(_copy_to_user) X86_FEATURE_REP_GOOD, \ "jmp copy_user_enhanced_fast_string", \ X86_FEATURE_ERMS - CFI_ENDPROC ENDPROC(_copy_to_user) /* Standard copy_from_user with segment limit checking */ ENTRY(_copy_from_user) - CFI_STARTPROC GET_THREAD_INFO(%rax) movq %rsi,%rcx addq %rdx,%rcx @@ -71,14 +43,12 @@ ENTRY(_copy_from_user) X86_FEATURE_REP_GOOD, \ "jmp copy_user_enhanced_fast_string", \ X86_FEATURE_ERMS - CFI_ENDPROC ENDPROC(_copy_from_user) .section .fixup,"ax" /* must zero dest */ ENTRY(bad_from_user) bad_from_user: - CFI_STARTPROC movl %edx,%ecx xorl %eax,%eax rep @@ -86,7 +56,6 @@ bad_from_user: bad_to_user: movl %edx,%eax ret - CFI_ENDPROC ENDPROC(bad_from_user) .previous @@ -104,7 +73,6 @@ ENDPROC(bad_from_user) * eax uncopied bytes or 0 if successful. */ ENTRY(copy_user_generic_unrolled) - CFI_STARTPROC ASM_STAC cmpl $8,%edx jb 20f /* less then 8 bytes, go to byte copy loop */ @@ -186,7 +154,6 @@ ENTRY(copy_user_generic_unrolled) _ASM_EXTABLE(19b,40b) _ASM_EXTABLE(21b,50b) _ASM_EXTABLE(22b,50b) - CFI_ENDPROC ENDPROC(copy_user_generic_unrolled) /* Some CPUs run faster using the string copy instructions. @@ -208,7 +175,6 @@ ENDPROC(copy_user_generic_unrolled) * eax uncopied bytes or 0 if successful. */ ENTRY(copy_user_generic_string) - CFI_STARTPROC ASM_STAC cmpl $8,%edx jb 2f /* less than 8 bytes, go to byte copy loop */ @@ -233,7 +199,6 @@ ENTRY(copy_user_generic_string) _ASM_EXTABLE(1b,11b) _ASM_EXTABLE(3b,12b) - CFI_ENDPROC ENDPROC(copy_user_generic_string) /* @@ -249,7 +214,6 @@ ENDPROC(copy_user_generic_string) * eax uncopied bytes or 0 if successful. */ ENTRY(copy_user_enhanced_fast_string) - CFI_STARTPROC ASM_STAC movl %edx,%ecx 1: rep @@ -264,5 +228,94 @@ ENTRY(copy_user_enhanced_fast_string) .previous _ASM_EXTABLE(1b,12b) - CFI_ENDPROC ENDPROC(copy_user_enhanced_fast_string) + +/* + * copy_user_nocache - Uncached memory copy with exception handling + * This will force destination/source out of cache for more performance. + */ +ENTRY(__copy_user_nocache) + ASM_STAC + cmpl $8,%edx + jb 20f /* less then 8 bytes, go to byte copy loop */ + ALIGN_DESTINATION + movl %edx,%ecx + andl $63,%edx + shrl $6,%ecx + jz 17f +1: movq (%rsi),%r8 +2: movq 1*8(%rsi),%r9 +3: movq 2*8(%rsi),%r10 +4: movq 3*8(%rsi),%r11 +5: movnti %r8,(%rdi) +6: movnti %r9,1*8(%rdi) +7: movnti %r10,2*8(%rdi) +8: movnti %r11,3*8(%rdi) +9: movq 4*8(%rsi),%r8 +10: movq 5*8(%rsi),%r9 +11: movq 6*8(%rsi),%r10 +12: movq 7*8(%rsi),%r11 +13: movnti %r8,4*8(%rdi) +14: movnti %r9,5*8(%rdi) +15: movnti %r10,6*8(%rdi) +16: movnti %r11,7*8(%rdi) + leaq 64(%rsi),%rsi + leaq 64(%rdi),%rdi + decl %ecx + jnz 1b +17: movl %edx,%ecx + andl $7,%edx + shrl $3,%ecx + jz 20f +18: movq (%rsi),%r8 +19: movnti %r8,(%rdi) + leaq 8(%rsi),%rsi + leaq 8(%rdi),%rdi + decl %ecx + jnz 18b +20: andl %edx,%edx + jz 23f + movl %edx,%ecx +21: movb (%rsi),%al +22: movb %al,(%rdi) + incq %rsi + incq %rdi + decl %ecx + jnz 21b +23: xorl %eax,%eax + ASM_CLAC + sfence + ret + + .section .fixup,"ax" +30: shll $6,%ecx + addl %ecx,%edx + jmp 60f +40: lea (%rdx,%rcx,8),%rdx + jmp 60f +50: movl %ecx,%edx +60: sfence + jmp copy_user_handle_tail + .previous + + _ASM_EXTABLE(1b,30b) + _ASM_EXTABLE(2b,30b) + _ASM_EXTABLE(3b,30b) + _ASM_EXTABLE(4b,30b) + _ASM_EXTABLE(5b,30b) + _ASM_EXTABLE(6b,30b) + _ASM_EXTABLE(7b,30b) + _ASM_EXTABLE(8b,30b) + _ASM_EXTABLE(9b,30b) + _ASM_EXTABLE(10b,30b) + _ASM_EXTABLE(11b,30b) + _ASM_EXTABLE(12b,30b) + _ASM_EXTABLE(13b,30b) + _ASM_EXTABLE(14b,30b) + _ASM_EXTABLE(15b,30b) + _ASM_EXTABLE(16b,30b) + _ASM_EXTABLE(18b,40b) + _ASM_EXTABLE(19b,40b) + _ASM_EXTABLE(21b,50b) + _ASM_EXTABLE(22b,50b) +ENDPROC(__copy_user_nocache) diff --git a/arch/x86/lib/copy_user_nocache_64.S b/arch/x86/lib/copy_user_nocache_64.S deleted file mode 100644 index 6a4f43c..0000000 --- a/arch/x86/lib/copy_user_nocache_64.S +++ /dev/null @@ -1,136 +0,0 @@ -/* - * Copyright 2008 Vitaly Mayatskikh <vmayatsk@redhat.com> - * Copyright 2002 Andi Kleen, SuSE Labs. - * Subject to the GNU Public License v2. - * - * Functions to copy from and to user space. - */ - -#include <linux/linkage.h> -#include <asm/dwarf2.h> - -#define FIX_ALIGNMENT 1 - -#include <asm/current.h> -#include <asm/asm-offsets.h> -#include <asm/thread_info.h> -#include <asm/asm.h> -#include <asm/smap.h> - - .macro ALIGN_DESTINATION -#ifdef FIX_ALIGNMENT - /* check for bad alignment of destination */ - movl %edi,%ecx - andl $7,%ecx - jz 102f /* already aligned */ - subl $8,%ecx - negl %ecx - subl %ecx,%edx -100: movb (%rsi),%al -101: movb %al,(%rdi) - incq %rsi - incq %rdi - decl %ecx - jnz 100b -102: - .section .fixup,"ax" -103: addl %ecx,%edx /* ecx is zerorest also */ - jmp copy_user_handle_tail - .previous - - _ASM_EXTABLE(100b,103b) - _ASM_EXTABLE(101b,103b) -#endif - .endm - -/* - * copy_user_nocache - Uncached memory copy with exception handling - * This will force destination/source out of cache for more performance. - */ -ENTRY(__copy_user_nocache) - CFI_STARTPROC - ASM_STAC - cmpl $8,%edx - jb 20f /* less then 8 bytes, go to byte copy loop */ - ALIGN_DESTINATION - movl %edx,%ecx - andl $63,%edx - shrl $6,%ecx - jz 17f -1: movq (%rsi),%r8 -2: movq 1*8(%rsi),%r9 -3: movq 2*8(%rsi),%r10 -4: movq 3*8(%rsi),%r11 -5: movnti %r8,(%rdi) -6: movnti %r9,1*8(%rdi) -7: movnti %r10,2*8(%rdi) -8: movnti %r11,3*8(%rdi) -9: movq 4*8(%rsi),%r8 -10: movq 5*8(%rsi),%r9 -11: movq 6*8(%rsi),%r10 -12: movq 7*8(%rsi),%r11 -13: movnti %r8,4*8(%rdi) -14: movnti %r9,5*8(%rdi) -15: movnti %r10,6*8(%rdi) -16: movnti %r11,7*8(%rdi) - leaq 64(%rsi),%rsi - leaq 64(%rdi),%rdi - decl %ecx - jnz 1b -17: movl %edx,%ecx - andl $7,%edx - shrl $3,%ecx - jz 20f -18: movq (%rsi),%r8 -19: movnti %r8,(%rdi) - leaq 8(%rsi),%rsi - leaq 8(%rdi),%rdi - decl %ecx - jnz 18b -20: andl %edx,%edx - jz 23f - movl %edx,%ecx -21: movb (%rsi),%al -22: movb %al,(%rdi) - incq %rsi - incq %rdi - decl %ecx - jnz 21b -23: xorl %eax,%eax - ASM_CLAC - sfence - ret - - .section .fixup,"ax" -30: shll $6,%ecx - addl %ecx,%edx - jmp 60f -40: lea (%rdx,%rcx,8),%rdx - jmp 60f -50: movl %ecx,%edx -60: sfence - jmp copy_user_handle_tail - .previous - - _ASM_EXTABLE(1b,30b) - _ASM_EXTABLE(2b,30b) - _ASM_EXTABLE(3b,30b) - _ASM_EXTABLE(4b,30b) - _ASM_EXTABLE(5b,30b) - _ASM_EXTABLE(6b,30b) - _ASM_EXTABLE(7b,30b) - _ASM_EXTABLE(8b,30b) - _ASM_EXTABLE(9b,30b) - _ASM_EXTABLE(10b,30b) - _ASM_EXTABLE(11b,30b) - _ASM_EXTABLE(12b,30b) - _ASM_EXTABLE(13b,30b) - _ASM_EXTABLE(14b,30b) - _ASM_EXTABLE(15b,30b) - _ASM_EXTABLE(16b,30b) - _ASM_EXTABLE(18b,40b) - _ASM_EXTABLE(19b,40b) - _ASM_EXTABLE(21b,50b) - _ASM_EXTABLE(22b,50b) - CFI_ENDPROC -ENDPROC(__copy_user_nocache) diff --git a/arch/x86/lib/csum-copy_64.S b/arch/x86/lib/csum-copy_64.S index 9734182..7e48807 100644 --- a/arch/x86/lib/csum-copy_64.S +++ b/arch/x86/lib/csum-copy_64.S @@ -6,7 +6,6 @@ * for more details. No warranty for anything given at all. */ #include <linux/linkage.h> -#include <asm/dwarf2.h> #include <asm/errno.h> #include <asm/asm.h> @@ -47,23 +46,16 @@ ENTRY(csum_partial_copy_generic) - CFI_STARTPROC cmpl $3*64, %edx jle .Lignore .Lignore: subq $7*8, %rsp - CFI_ADJUST_CFA_OFFSET 7*8 movq %rbx, 2*8(%rsp) - CFI_REL_OFFSET rbx, 2*8 movq %r12, 3*8(%rsp) - CFI_REL_OFFSET r12, 3*8 movq %r14, 4*8(%rsp) - CFI_REL_OFFSET r14, 4*8 movq %r13, 5*8(%rsp) - CFI_REL_OFFSET r13, 5*8 movq %rbp, 6*8(%rsp) - CFI_REL_OFFSET rbp, 6*8 movq %r8, (%rsp) movq %r9, 1*8(%rsp) @@ -206,22 +198,14 @@ ENTRY(csum_partial_copy_generic) addl %ebx, %eax adcl %r9d, %eax /* carry */ - CFI_REMEMBER_STATE .Lende: movq 2*8(%rsp), %rbx - CFI_RESTORE rbx movq 3*8(%rsp), %r12 - CFI_RESTORE r12 movq 4*8(%rsp), %r14 - CFI_RESTORE r14 movq 5*8(%rsp), %r13 - CFI_RESTORE r13 movq 6*8(%rsp), %rbp - CFI_RESTORE rbp addq $7*8, %rsp - CFI_ADJUST_CFA_OFFSET -7*8 ret - CFI_RESTORE_STATE /* Exception handlers. Very simple, zeroing is done in the wrappers */ .Lbad_source: @@ -237,5 +221,4 @@ ENTRY(csum_partial_copy_generic) jz .Lende movl $-EFAULT, (%rax) jmp .Lende - CFI_ENDPROC ENDPROC(csum_partial_copy_generic) diff --git a/arch/x86/lib/getuser.S b/arch/x86/lib/getuser.S index a451235..46668cd 100644 --- a/arch/x86/lib/getuser.S +++ b/arch/x86/lib/getuser.S @@ -26,7 +26,6 @@ */ #include <linux/linkage.h> -#include <asm/dwarf2.h> #include <asm/page_types.h> #include <asm/errno.h> #include <asm/asm-offsets.h> @@ -36,7 +35,6 @@ .text ENTRY(__get_user_1) - CFI_STARTPROC GET_THREAD_INFO(%_ASM_DX) cmp TI_addr_limit(%_ASM_DX),%_ASM_AX jae bad_get_user @@ -45,11 +43,9 @@ ENTRY(__get_user_1) xor %eax,%eax ASM_CLAC ret - CFI_ENDPROC ENDPROC(__get_user_1) ENTRY(__get_user_2) - CFI_STARTPROC add $1,%_ASM_AX jc bad_get_user GET_THREAD_INFO(%_ASM_DX) @@ -60,11 +56,9 @@ ENTRY(__get_user_2) xor %eax,%eax ASM_CLAC ret - CFI_ENDPROC ENDPROC(__get_user_2) ENTRY(__get_user_4) - CFI_STARTPROC add $3,%_ASM_AX jc bad_get_user GET_THREAD_INFO(%_ASM_DX) @@ -75,11 +69,9 @@ ENTRY(__get_user_4) xor %eax,%eax ASM_CLAC ret - CFI_ENDPROC ENDPROC(__get_user_4) ENTRY(__get_user_8) - CFI_STARTPROC #ifdef CONFIG_X86_64 add $7,%_ASM_AX jc bad_get_user @@ -104,28 +96,23 @@ ENTRY(__get_user_8) ASM_CLAC ret #endif - CFI_ENDPROC ENDPROC(__get_user_8) bad_get_user: - CFI_STARTPROC xor %edx,%edx mov $(-EFAULT),%_ASM_AX ASM_CLAC ret - CFI_ENDPROC END(bad_get_user) #ifdef CONFIG_X86_32 bad_get_user_8: - CFI_STARTPROC xor %edx,%edx xor %ecx,%ecx mov $(-EFAULT),%_ASM_AX ASM_CLAC ret - CFI_ENDPROC END(bad_get_user_8) #endif diff --git a/arch/x86/lib/iomap_copy_64.S b/arch/x86/lib/iomap_copy_64.S index 05a95e7..33147fe 100644 --- a/arch/x86/lib/iomap_copy_64.S +++ b/arch/x86/lib/iomap_copy_64.S @@ -16,15 +16,12 @@ */ #include <linux/linkage.h> -#include <asm/dwarf2.h> /* * override generic version in lib/iomap_copy.c */ ENTRY(__iowrite32_copy) - CFI_STARTPROC movl %edx,%ecx rep movsd ret - CFI_ENDPROC ENDPROC(__iowrite32_copy) diff --git a/arch/x86/lib/memcpy_64.S b/arch/x86/lib/memcpy_64.S index b046664..16698bb 100644 --- a/arch/x86/lib/memcpy_64.S +++ b/arch/x86/lib/memcpy_64.S @@ -2,7 +2,6 @@ #include <linux/linkage.h> #include <asm/cpufeature.h> -#include <asm/dwarf2.h> #include <asm/alternative-asm.h> /* @@ -53,7 +52,6 @@ ENTRY(memcpy_erms) ENDPROC(memcpy_erms) ENTRY(memcpy_orig) - CFI_STARTPROC movq %rdi, %rax cmpq $0x20, %rdx @@ -178,5 +176,4 @@ ENTRY(memcpy_orig) .Lend: retq - CFI_ENDPROC ENDPROC(memcpy_orig) diff --git a/arch/x86/lib/memmove_64.S b/arch/x86/lib/memmove_64.S index 0f8a0d0..ca2afdd 100644 --- a/arch/x86/lib/memmove_64.S +++ b/arch/x86/lib/memmove_64.S @@ -6,7 +6,6 @@ * - Copyright 2011 Fenghua Yu <fenghua.yu@intel.com> */ #include <linux/linkage.h> -#include <asm/dwarf2.h> #include <asm/cpufeature.h> #include <asm/alternative-asm.h> @@ -27,7 +26,6 @@ ENTRY(memmove) ENTRY(__memmove) - CFI_STARTPROC /* Handle more 32 bytes in loop */ mov %rdi, %rax @@ -207,6 +205,5 @@ ENTRY(__memmove) movb %r11b, (%rdi) 13: retq - CFI_ENDPROC ENDPROC(__memmove) ENDPROC(memmove) diff --git a/arch/x86/lib/memset_64.S b/arch/x86/lib/memset_64.S index 93118fb..2661fad 100644 --- a/arch/x86/lib/memset_64.S +++ b/arch/x86/lib/memset_64.S @@ -1,7 +1,6 @@ /* Copyright 2002 Andi Kleen, SuSE Labs */ #include <linux/linkage.h> -#include <asm/dwarf2.h> #include <asm/cpufeature.h> #include <asm/alternative-asm.h> @@ -66,7 +65,6 @@ ENTRY(memset_erms) ENDPROC(memset_erms) ENTRY(memset_orig) - CFI_STARTPROC movq %rdi,%r10 /* expand byte value */ @@ -78,7 +76,6 @@ ENTRY(memset_orig) movl %edi,%r9d andl $7,%r9d jnz .Lbad_alignment - CFI_REMEMBER_STATE .Lafter_bad_alignment: movq %rdx,%rcx @@ -128,7 +125,6 @@ ENTRY(memset_orig) movq %r10,%rax ret - CFI_RESTORE_STATE .Lbad_alignment: cmpq $7,%rdx jbe .Lhandle_7 @@ -139,5 +135,4 @@ ENTRY(memset_orig) subq %r8,%rdx jmp .Lafter_bad_alignment .Lfinal: - CFI_ENDPROC ENDPROC(memset_orig) diff --git a/arch/x86/lib/msr-reg.S b/arch/x86/lib/msr-reg.S index 3ca5218..c815564 100644 --- a/arch/x86/lib/msr-reg.S +++ b/arch/x86/lib/msr-reg.S @@ -1,6 +1,5 @@ #include <linux/linkage.h> #include <linux/errno.h> -#include <asm/dwarf2.h> #include <asm/asm.h> #include <asm/msr.h> @@ -13,9 +12,8 @@ */ .macro op_safe_regs op ENTRY(\op\()_safe_regs) - CFI_STARTPROC - pushq_cfi_reg rbx - pushq_cfi_reg rbp + pushq %rbx + pushq %rbp movq %rdi, %r10 /* Save pointer */ xorl %r11d, %r11d /* Return value */ movl (%rdi), %eax @@ -25,7 +23,6 @@ ENTRY(\op\()_safe_regs) movl 20(%rdi), %ebp movl 24(%rdi), %esi movl 28(%rdi), %edi - CFI_REMEMBER_STATE 1: \op 2: movl %eax, (%r10) movl %r11d, %eax /* Return value */ @@ -35,16 +32,14 @@ ENTRY(\op\()_safe_regs) movl %ebp, 20(%r10) movl %esi, 24(%r10) movl %edi, 28(%r10) - popq_cfi_reg rbp - popq_cfi_reg rbx + popq %rbp + popq %rbx ret 3: - CFI_RESTORE_STATE movl $-EIO, %r11d jmp 2b _ASM_EXTABLE(1b, 3b) - CFI_ENDPROC ENDPROC(\op\()_safe_regs) .endm @@ -52,13 +47,12 @@ ENDPROC(\op\()_safe_regs) .macro op_safe_regs op ENTRY(\op\()_safe_regs) - CFI_STARTPROC - pushl_cfi_reg ebx - pushl_cfi_reg ebp - pushl_cfi_reg esi - pushl_cfi_reg edi - pushl_cfi $0 /* Return value */ - pushl_cfi %eax + pushl %ebx + pushl %ebp + pushl %esi + pushl %edi + pushl $0 /* Return value */ + pushl %eax movl 4(%eax), %ecx movl 8(%eax), %edx movl 12(%eax), %ebx @@ -66,32 +60,28 @@ ENTRY(\op\()_safe_regs) movl 24(%eax), %esi movl 28(%eax), %edi movl (%eax), %eax - CFI_REMEMBER_STATE 1: \op -2: pushl_cfi %eax +2: pushl %eax movl 4(%esp), %eax - popl_cfi (%eax) + popl (%eax) addl $4, %esp - CFI_ADJUST_CFA_OFFSET -4 movl %ecx, 4(%eax) movl %edx, 8(%eax) movl %ebx, 12(%eax) movl %ebp, 20(%eax) movl %esi, 24(%eax) movl %edi, 28(%eax) - popl_cfi %eax - popl_cfi_reg edi - popl_cfi_reg esi - popl_cfi_reg ebp - popl_cfi_reg ebx + popl %eax + popl %edi + popl %esi + popl %ebp + popl %ebx ret 3: - CFI_RESTORE_STATE movl $-EIO, 4(%esp) jmp 2b _ASM_EXTABLE(1b, 3b) - CFI_ENDPROC ENDPROC(\op\()_safe_regs) .endm diff --git a/arch/x86/lib/putuser.S b/arch/x86/lib/putuser.S index fc6ba17..e0817a1 100644 --- a/arch/x86/lib/putuser.S +++ b/arch/x86/lib/putuser.S @@ -11,7 +11,6 @@ * return value. */ #include <linux/linkage.h> -#include <asm/dwarf2.h> #include <asm/thread_info.h> #include <asm/errno.h> #include <asm/asm.h> @@ -30,11 +29,9 @@ * as they get called from within inline assembly. */ -#define ENTER CFI_STARTPROC ; \ - GET_THREAD_INFO(%_ASM_BX) +#define ENTER GET_THREAD_INFO(%_ASM_BX) #define EXIT ASM_CLAC ; \ - ret ; \ - CFI_ENDPROC + ret .text ENTRY(__put_user_1) @@ -87,7 +84,6 @@ ENTRY(__put_user_8) ENDPROC(__put_user_8) bad_put_user: - CFI_STARTPROC movl $-EFAULT,%eax EXIT END(bad_put_user) diff --git a/arch/x86/lib/rwsem.S b/arch/x86/lib/rwsem.S index 2322abe..40027db 100644 --- a/arch/x86/lib/rwsem.S +++ b/arch/x86/lib/rwsem.S @@ -15,7 +15,6 @@ #include <linux/linkage.h> #include <asm/alternative-asm.h> -#include <asm/dwarf2.h> #define __ASM_HALF_REG(reg) __ASM_SEL(reg, e##reg) #define __ASM_HALF_SIZE(inst) __ASM_SEL(inst##w, inst##l) @@ -34,10 +33,10 @@ */ #define save_common_regs \ - pushl_cfi_reg ecx + pushl %ecx #define restore_common_regs \ - popl_cfi_reg ecx + popl %ecx /* Avoid uglifying the argument copying x86-64 needs to do. */ .macro movq src, dst @@ -64,50 +63,45 @@ */ #define save_common_regs \ - pushq_cfi_reg rdi; \ - pushq_cfi_reg rsi; \ - pushq_cfi_reg rcx; \ - pushq_cfi_reg r8; \ - pushq_cfi_reg r9; \ - pushq_cfi_reg r10; \ - pushq_cfi_reg r11 + pushq %rdi; \ + pushq %rsi; \ + pushq %rcx; \ + pushq %r8; \ + pushq %r9; \ + pushq %r10; \ + pushq %r11 #define restore_common_regs \ - popq_cfi_reg r11; \ - popq_cfi_reg r10; \ - popq_cfi_reg r9; \ - popq_cfi_reg r8; \ - popq_cfi_reg rcx; \ - popq_cfi_reg rsi; \ - popq_cfi_reg rdi + popq %r11; \ + popq %r10; \ + popq %r9; \ + popq %r8; \ + popq %rcx; \ + popq %rsi; \ + popq %rdi #endif /* Fix up special calling conventions */ ENTRY(call_rwsem_down_read_failed) - CFI_STARTPROC save_common_regs - __ASM_SIZE(push,_cfi_reg) __ASM_REG(dx) + __ASM_SIZE(push,) %__ASM_REG(dx) movq %rax,%rdi call rwsem_down_read_failed - __ASM_SIZE(pop,_cfi_reg) __ASM_REG(dx) + __ASM_SIZE(pop,) %__ASM_REG(dx) restore_common_regs ret - CFI_ENDPROC ENDPROC(call_rwsem_down_read_failed) ENTRY(call_rwsem_down_write_failed) - CFI_STARTPROC save_common_regs movq %rax,%rdi call rwsem_down_write_failed restore_common_regs ret - CFI_ENDPROC ENDPROC(call_rwsem_down_write_failed) ENTRY(call_rwsem_wake) - CFI_STARTPROC /* do nothing if still outstanding active readers */ __ASM_HALF_SIZE(dec) %__ASM_HALF_REG(dx) jnz 1f @@ -116,17 +110,14 @@ ENTRY(call_rwsem_wake) call rwsem_wake restore_common_regs 1: ret - CFI_ENDPROC ENDPROC(call_rwsem_wake) ENTRY(call_rwsem_downgrade_wake) - CFI_STARTPROC save_common_regs - __ASM_SIZE(push,_cfi_reg) __ASM_REG(dx) + __ASM_SIZE(push,) %__ASM_REG(dx) movq %rax,%rdi call rwsem_downgrade_wake - __ASM_SIZE(pop,_cfi_reg) __ASM_REG(dx) + __ASM_SIZE(pop,) %__ASM_REG(dx) restore_common_regs ret - CFI_ENDPROC ENDPROC(call_rwsem_downgrade_wake) diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c index 1d55318..8533b46 100644 --- a/arch/x86/mm/init.c +++ b/arch/x86/mm/init.c @@ -40,7 +40,7 @@ */ uint16_t __cachemode2pte_tbl[_PAGE_CACHE_MODE_NUM] = { [_PAGE_CACHE_MODE_WB ] = 0 | 0 , - [_PAGE_CACHE_MODE_WC ] = _PAGE_PWT | 0 , + [_PAGE_CACHE_MODE_WC ] = 0 | _PAGE_PCD, [_PAGE_CACHE_MODE_UC_MINUS] = 0 | _PAGE_PCD, [_PAGE_CACHE_MODE_UC ] = _PAGE_PWT | _PAGE_PCD, [_PAGE_CACHE_MODE_WT ] = 0 | _PAGE_PCD, @@ -50,11 +50,11 @@ EXPORT_SYMBOL(__cachemode2pte_tbl); uint8_t __pte2cachemode_tbl[8] = { [__pte2cm_idx( 0 | 0 | 0 )] = _PAGE_CACHE_MODE_WB, - [__pte2cm_idx(_PAGE_PWT | 0 | 0 )] = _PAGE_CACHE_MODE_WC, + [__pte2cm_idx(_PAGE_PWT | 0 | 0 )] = _PAGE_CACHE_MODE_UC_MINUS, [__pte2cm_idx( 0 | _PAGE_PCD | 0 )] = _PAGE_CACHE_MODE_UC_MINUS, [__pte2cm_idx(_PAGE_PWT | _PAGE_PCD | 0 )] = _PAGE_CACHE_MODE_UC, [__pte2cm_idx( 0 | 0 | _PAGE_PAT)] = _PAGE_CACHE_MODE_WB, - [__pte2cm_idx(_PAGE_PWT | 0 | _PAGE_PAT)] = _PAGE_CACHE_MODE_WC, + [__pte2cm_idx(_PAGE_PWT | 0 | _PAGE_PAT)] = _PAGE_CACHE_MODE_UC_MINUS, [__pte2cm_idx(0 | _PAGE_PCD | _PAGE_PAT)] = _PAGE_CACHE_MODE_UC_MINUS, [__pte2cm_idx(_PAGE_PWT | _PAGE_PCD | _PAGE_PAT)] = _PAGE_CACHE_MODE_UC, }; diff --git a/arch/x86/mm/iomap_32.c b/arch/x86/mm/iomap_32.c index 2b7ece0..9c0ff04 100644 --- a/arch/x86/mm/iomap_32.c +++ b/arch/x86/mm/iomap_32.c @@ -78,13 +78,13 @@ void __iomem * iomap_atomic_prot_pfn(unsigned long pfn, pgprot_t prot) { /* - * For non-PAT systems, promote PAGE_KERNEL_WC to PAGE_KERNEL_UC_MINUS. - * PAGE_KERNEL_WC maps to PWT, which translates to uncached if the - * MTRR is UC or WC. UC_MINUS gets the real intention, of the - * user, which is "WC if the MTRR is WC, UC if you can't do that." + * For non-PAT systems, translate non-WB request to UC- just in + * case the caller set the PWT bit to prot directly without using + * pgprot_writecombine(). UC- translates to uncached if the MTRR + * is UC or WC. UC- gets the real intention, of the user, which is + * "WC if the MTRR is WC, UC if you can't do that." */ - if (!pat_enabled && pgprot_val(prot) == - (__PAGE_KERNEL | cachemode2protval(_PAGE_CACHE_MODE_WC))) + if (!pat_enabled() && pgprot2cachemode(prot) != _PAGE_CACHE_MODE_WB) prot = __pgprot(__PAGE_KERNEL | cachemode2protval(_PAGE_CACHE_MODE_UC_MINUS)); diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c index 27ff212..cc5ccc4 100644 --- a/arch/x86/mm/ioremap.c +++ b/arch/x86/mm/ioremap.c @@ -42,6 +42,9 @@ int ioremap_change_attr(unsigned long vaddr, unsigned long size, case _PAGE_CACHE_MODE_WC: err = _set_memory_wc(vaddr, nrpages); break; + case _PAGE_CACHE_MODE_WT: + err = _set_memory_wt(vaddr, nrpages); + break; case _PAGE_CACHE_MODE_WB: err = _set_memory_wb(vaddr, nrpages); break; @@ -172,6 +175,10 @@ static void __iomem *__ioremap_caller(resource_size_t phys_addr, prot = __pgprot(pgprot_val(prot) | cachemode2protval(_PAGE_CACHE_MODE_WC)); break; + case _PAGE_CACHE_MODE_WT: + prot = __pgprot(pgprot_val(prot) | + cachemode2protval(_PAGE_CACHE_MODE_WT)); + break; case _PAGE_CACHE_MODE_WB: break; } @@ -234,10 +241,11 @@ void __iomem *ioremap_nocache(resource_size_t phys_addr, unsigned long size) { /* * Ideally, this should be: - * pat_enabled ? _PAGE_CACHE_MODE_UC : _PAGE_CACHE_MODE_UC_MINUS; + * pat_enabled() ? _PAGE_CACHE_MODE_UC : _PAGE_CACHE_MODE_UC_MINUS; * * Till we fix all X drivers to use ioremap_wc(), we will use - * UC MINUS. + * UC MINUS. Drivers that are certain they need or can already + * be converted over to strong UC can use ioremap_uc(). */ enum page_cache_mode pcm = _PAGE_CACHE_MODE_UC_MINUS; @@ -247,6 +255,39 @@ void __iomem *ioremap_nocache(resource_size_t phys_addr, unsigned long size) EXPORT_SYMBOL(ioremap_nocache); /** + * ioremap_uc - map bus memory into CPU space as strongly uncachable + * @phys_addr: bus address of the memory + * @size: size of the resource to map + * + * ioremap_uc performs a platform specific sequence of operations to + * make bus memory CPU accessible via the readb/readw/readl/writeb/ + * writew/writel functions and the other mmio helpers. The returned + * address is not guaranteed to be usable directly as a virtual + * address. + * + * This version of ioremap ensures that the memory is marked with a strong + * preference as completely uncachable on the CPU when possible. For non-PAT + * systems this ends up setting page-attribute flags PCD=1, PWT=1. For PAT + * systems this will set the PAT entry for the pages as strong UC. This call + * will honor existing caching rules from things like the PCI bus. Note that + * there are other caches and buffers on many busses. In particular driver + * authors should read up on PCI writes. + * + * It's useful if some control registers are in such an area and + * write combining or read caching is not desirable: + * + * Must be freed with iounmap. + */ +void __iomem *ioremap_uc(resource_size_t phys_addr, unsigned long size) +{ + enum page_cache_mode pcm = _PAGE_CACHE_MODE_UC; + + return __ioremap_caller(phys_addr, size, pcm, + __builtin_return_address(0)); +} +EXPORT_SYMBOL_GPL(ioremap_uc); + +/** * ioremap_wc - map memory into CPU space write combined * @phys_addr: bus address of the memory * @size: size of the resource to map @@ -258,14 +299,28 @@ EXPORT_SYMBOL(ioremap_nocache); */ void __iomem *ioremap_wc(resource_size_t phys_addr, unsigned long size) { - if (pat_enabled) - return __ioremap_caller(phys_addr, size, _PAGE_CACHE_MODE_WC, + return __ioremap_caller(phys_addr, size, _PAGE_CACHE_MODE_WC, __builtin_return_address(0)); - else - return ioremap_nocache(phys_addr, size); } EXPORT_SYMBOL(ioremap_wc); +/** + * ioremap_wt - map memory into CPU space write through + * @phys_addr: bus address of the memory + * @size: size of the resource to map + * + * This version of ioremap ensures that the memory is marked write through. + * Write through stores data into memory while keeping the cache up-to-date. + * + * Must be freed with iounmap. + */ +void __iomem *ioremap_wt(resource_size_t phys_addr, unsigned long size) +{ + return __ioremap_caller(phys_addr, size, _PAGE_CACHE_MODE_WT, + __builtin_return_address(0)); +} +EXPORT_SYMBOL(ioremap_wt); + void __iomem *ioremap_cache(resource_size_t phys_addr, unsigned long size) { return __ioremap_caller(phys_addr, size, _PAGE_CACHE_MODE_WB, @@ -331,7 +386,7 @@ void iounmap(volatile void __iomem *addr) } EXPORT_SYMBOL(iounmap); -int arch_ioremap_pud_supported(void) +int __init arch_ioremap_pud_supported(void) { #ifdef CONFIG_X86_64 return cpu_has_gbpages; @@ -340,7 +395,7 @@ int arch_ioremap_pud_supported(void) #endif } -int arch_ioremap_pmd_supported(void) +int __init arch_ioremap_pmd_supported(void) { return cpu_has_pse; } diff --git a/arch/x86/mm/pageattr-test.c b/arch/x86/mm/pageattr-test.c index 6629f39..8ff686a 100644 --- a/arch/x86/mm/pageattr-test.c +++ b/arch/x86/mm/pageattr-test.c @@ -9,6 +9,7 @@ #include <linux/random.h> #include <linux/kernel.h> #include <linux/mm.h> +#include <linux/vmalloc.h> #include <asm/cacheflush.h> #include <asm/pgtable.h> diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c index 89af288..727158c 100644 --- a/arch/x86/mm/pageattr.c +++ b/arch/x86/mm/pageattr.c @@ -14,6 +14,7 @@ #include <linux/percpu.h> #include <linux/gfp.h> #include <linux/pci.h> +#include <linux/vmalloc.h> #include <asm/e820.h> #include <asm/processor.h> @@ -129,16 +130,15 @@ within(unsigned long addr, unsigned long start, unsigned long end) */ void clflush_cache_range(void *vaddr, unsigned int size) { - void *vend = vaddr + size - 1; + unsigned long clflush_mask = boot_cpu_data.x86_clflush_size - 1; + void *vend = vaddr + size; + void *p; mb(); - for (; vaddr < vend; vaddr += boot_cpu_data.x86_clflush_size) - clflushopt(vaddr); - /* - * Flush any possible final partial cacheline: - */ - clflushopt(vend); + for (p = (void *)((unsigned long)vaddr & ~clflush_mask); + p < vend; p += boot_cpu_data.x86_clflush_size) + clflushopt(p); mb(); } @@ -418,13 +418,11 @@ phys_addr_t slow_virt_to_phys(void *__virt_addr) phys_addr_t phys_addr; unsigned long offset; enum pg_level level; - unsigned long psize; unsigned long pmask; pte_t *pte; pte = lookup_address(virt_addr, &level); BUG_ON(!pte); - psize = page_level_size(level); pmask = page_level_mask(level); offset = virt_addr & ~pmask; phys_addr = (phys_addr_t)pte_pfn(*pte) << PAGE_SHIFT; @@ -1468,6 +1466,9 @@ int _set_memory_uc(unsigned long addr, int numpages) { /* * for now UC MINUS. see comments in ioremap_nocache() + * If you really need strong UC use ioremap_uc(), but note + * that you cannot override IO areas with set_memory_*() as + * these helpers cannot work with IO memory. */ return change_page_attr_set(&addr, numpages, cachemode2pgprot(_PAGE_CACHE_MODE_UC_MINUS), @@ -1502,12 +1503,10 @@ EXPORT_SYMBOL(set_memory_uc); static int _set_memory_array(unsigned long *addr, int addrinarray, enum page_cache_mode new_type) { + enum page_cache_mode set_type; int i, j; int ret; - /* - * for now UC MINUS. see comments in ioremap_nocache() - */ for (i = 0; i < addrinarray; i++) { ret = reserve_memtype(__pa(addr[i]), __pa(addr[i]) + PAGE_SIZE, new_type, NULL); @@ -1515,9 +1514,12 @@ static int _set_memory_array(unsigned long *addr, int addrinarray, goto out_free; } + /* If WC, set to UC- first and then WC */ + set_type = (new_type == _PAGE_CACHE_MODE_WC) ? + _PAGE_CACHE_MODE_UC_MINUS : new_type; + ret = change_page_attr_set(addr, addrinarray, - cachemode2pgprot(_PAGE_CACHE_MODE_UC_MINUS), - 1); + cachemode2pgprot(set_type), 1); if (!ret && new_type == _PAGE_CACHE_MODE_WC) ret = change_page_attr_set_clr(addr, addrinarray, @@ -1549,6 +1551,12 @@ int set_memory_array_wc(unsigned long *addr, int addrinarray) } EXPORT_SYMBOL(set_memory_array_wc); +int set_memory_array_wt(unsigned long *addr, int addrinarray) +{ + return _set_memory_array(addr, addrinarray, _PAGE_CACHE_MODE_WT); +} +EXPORT_SYMBOL_GPL(set_memory_array_wt); + int _set_memory_wc(unsigned long addr, int numpages) { int ret; @@ -1571,27 +1579,42 @@ int set_memory_wc(unsigned long addr, int numpages) { int ret; - if (!pat_enabled) - return set_memory_uc(addr, numpages); - ret = reserve_memtype(__pa(addr), __pa(addr) + numpages * PAGE_SIZE, _PAGE_CACHE_MODE_WC, NULL); if (ret) - goto out_err; + return ret; ret = _set_memory_wc(addr, numpages); if (ret) - goto out_free; - - return 0; + free_memtype(__pa(addr), __pa(addr) + numpages * PAGE_SIZE); -out_free: - free_memtype(__pa(addr), __pa(addr) + numpages * PAGE_SIZE); -out_err: return ret; } EXPORT_SYMBOL(set_memory_wc); +int _set_memory_wt(unsigned long addr, int numpages) +{ + return change_page_attr_set(&addr, numpages, + cachemode2pgprot(_PAGE_CACHE_MODE_WT), 0); +} + +int set_memory_wt(unsigned long addr, int numpages) +{ + int ret; + + ret = reserve_memtype(__pa(addr), __pa(addr) + numpages * PAGE_SIZE, + _PAGE_CACHE_MODE_WT, NULL); + if (ret) + return ret; + + ret = _set_memory_wt(addr, numpages); + if (ret) + free_memtype(__pa(addr), __pa(addr) + numpages * PAGE_SIZE); + + return ret; +} +EXPORT_SYMBOL_GPL(set_memory_wt); + int _set_memory_wb(unsigned long addr, int numpages) { /* WB cache mode is hard wired to all cache attribute bits being 0 */ @@ -1682,6 +1705,7 @@ static int _set_pages_array(struct page **pages, int addrinarray, { unsigned long start; unsigned long end; + enum page_cache_mode set_type; int i; int free_idx; int ret; @@ -1695,8 +1719,12 @@ static int _set_pages_array(struct page **pages, int addrinarray, goto err_out; } + /* If WC, set to UC- first and then WC */ + set_type = (new_type == _PAGE_CACHE_MODE_WC) ? + _PAGE_CACHE_MODE_UC_MINUS : new_type; + ret = cpa_set_pages_array(pages, addrinarray, - cachemode2pgprot(_PAGE_CACHE_MODE_UC_MINUS)); + cachemode2pgprot(set_type)); if (!ret && new_type == _PAGE_CACHE_MODE_WC) ret = change_page_attr_set_clr(NULL, addrinarray, cachemode2pgprot( @@ -1730,6 +1758,12 @@ int set_pages_array_wc(struct page **pages, int addrinarray) } EXPORT_SYMBOL(set_pages_array_wc); +int set_pages_array_wt(struct page **pages, int addrinarray) +{ + return _set_pages_array(pages, addrinarray, _PAGE_CACHE_MODE_WT); +} +EXPORT_SYMBOL_GPL(set_pages_array_wt); + int set_pages_wb(struct page *page, int numpages) { unsigned long addr = (unsigned long)page_address(page); diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c index 35af677..188e3e0 100644 --- a/arch/x86/mm/pat.c +++ b/arch/x86/mm/pat.c @@ -33,13 +33,17 @@ #include "pat_internal.h" #include "mm_internal.h" -#ifdef CONFIG_X86_PAT -int __read_mostly pat_enabled = 1; +#undef pr_fmt +#define pr_fmt(fmt) "" fmt + +static bool boot_cpu_done; + +static int __read_mostly __pat_enabled = IS_ENABLED(CONFIG_X86_PAT); static inline void pat_disable(const char *reason) { - pat_enabled = 0; - printk(KERN_INFO "%s\n", reason); + __pat_enabled = 0; + pr_info("x86/PAT: %s\n", reason); } static int __init nopat(char *str) @@ -48,13 +52,12 @@ static int __init nopat(char *str) return 0; } early_param("nopat", nopat); -#else -static inline void pat_disable(const char *reason) + +bool pat_enabled(void) { - (void)reason; + return !!__pat_enabled; } -#endif - +EXPORT_SYMBOL_GPL(pat_enabled); int pat_debug_enable; @@ -65,22 +68,24 @@ static int __init pat_debug_setup(char *str) } __setup("debugpat", pat_debug_setup); -static u64 __read_mostly boot_pat_state; - #ifdef CONFIG_X86_PAT /* - * X86 PAT uses page flags WC and Uncached together to keep track of - * memory type of pages that have backing page struct. X86 PAT supports 3 - * different memory types, _PAGE_CACHE_MODE_WB, _PAGE_CACHE_MODE_WC and - * _PAGE_CACHE_MODE_UC_MINUS and fourth state where page's memory type has not - * been changed from its default (value of -1 used to denote this). - * Note we do not support _PAGE_CACHE_MODE_UC here. + * X86 PAT uses page flags arch_1 and uncached together to keep track of + * memory type of pages that have backing page struct. + * + * X86 PAT supports 4 different memory types: + * - _PAGE_CACHE_MODE_WB + * - _PAGE_CACHE_MODE_WC + * - _PAGE_CACHE_MODE_UC_MINUS + * - _PAGE_CACHE_MODE_WT + * + * _PAGE_CACHE_MODE_WB is the default type. */ -#define _PGMT_DEFAULT 0 +#define _PGMT_WB 0 #define _PGMT_WC (1UL << PG_arch_1) #define _PGMT_UC_MINUS (1UL << PG_uncached) -#define _PGMT_WB (1UL << PG_uncached | 1UL << PG_arch_1) +#define _PGMT_WT (1UL << PG_uncached | 1UL << PG_arch_1) #define _PGMT_MASK (1UL << PG_uncached | 1UL << PG_arch_1) #define _PGMT_CLEAR_MASK (~_PGMT_MASK) @@ -88,14 +93,14 @@ static inline enum page_cache_mode get_page_memtype(struct page *pg) { unsigned long pg_flags = pg->flags & _PGMT_MASK; - if (pg_flags == _PGMT_DEFAULT) - return -1; + if (pg_flags == _PGMT_WB) + return _PAGE_CACHE_MODE_WB; else if (pg_flags == _PGMT_WC) return _PAGE_CACHE_MODE_WC; else if (pg_flags == _PGMT_UC_MINUS) return _PAGE_CACHE_MODE_UC_MINUS; else - return _PAGE_CACHE_MODE_WB; + return _PAGE_CACHE_MODE_WT; } static inline void set_page_memtype(struct page *pg, @@ -112,11 +117,12 @@ static inline void set_page_memtype(struct page *pg, case _PAGE_CACHE_MODE_UC_MINUS: memtype_flags = _PGMT_UC_MINUS; break; - case _PAGE_CACHE_MODE_WB: - memtype_flags = _PGMT_WB; + case _PAGE_CACHE_MODE_WT: + memtype_flags = _PGMT_WT; break; + case _PAGE_CACHE_MODE_WB: default: - memtype_flags = _PGMT_DEFAULT; + memtype_flags = _PGMT_WB; break; } @@ -174,78 +180,154 @@ static enum page_cache_mode pat_get_cache_mode(unsigned pat_val, char *msg) * configuration. * Using lower indices is preferred, so we start with highest index. */ -void pat_init_cache_modes(void) +void pat_init_cache_modes(u64 pat) { - int i; enum page_cache_mode cache; char pat_msg[33]; - u64 pat; + int i; - rdmsrl(MSR_IA32_CR_PAT, pat); pat_msg[32] = 0; for (i = 7; i >= 0; i--) { cache = pat_get_cache_mode((pat >> (i * 8)) & 7, pat_msg + 4 * i); update_cache_mode_entry(i, cache); } - pr_info("PAT configuration [0-7]: %s\n", pat_msg); + pr_info("x86/PAT: Configuration [0-7]: %s\n", pat_msg); } #define PAT(x, y) ((u64)PAT_ ## y << ((x)*8)) -void pat_init(void) +static void pat_bsp_init(u64 pat) { - u64 pat; - bool boot_cpu = !boot_pat_state; + u64 tmp_pat; - if (!pat_enabled) + if (!cpu_has_pat) { + pat_disable("PAT not supported by CPU."); return; + } - if (!cpu_has_pat) { - if (!boot_pat_state) { - pat_disable("PAT not supported by CPU."); - return; - } else { - /* - * If this happens we are on a secondary CPU, but - * switched to PAT on the boot CPU. We have no way to - * undo PAT. - */ - printk(KERN_ERR "PAT enabled, " - "but not supported by secondary CPU\n"); - BUG(); - } + if (!pat_enabled()) + goto done; + + rdmsrl(MSR_IA32_CR_PAT, tmp_pat); + if (!tmp_pat) { + pat_disable("PAT MSR is 0, disabled."); + return; } - /* Set PWT to Write-Combining. All other bits stay the same */ - /* - * PTE encoding used in Linux: - * PAT - * |PCD - * ||PWT - * ||| - * 000 WB _PAGE_CACHE_WB - * 001 WC _PAGE_CACHE_WC - * 010 UC- _PAGE_CACHE_UC_MINUS - * 011 UC _PAGE_CACHE_UC - * PAT bit unused - */ - pat = PAT(0, WB) | PAT(1, WC) | PAT(2, UC_MINUS) | PAT(3, UC) | - PAT(4, WB) | PAT(5, WC) | PAT(6, UC_MINUS) | PAT(7, UC); - - /* Boot CPU check */ - if (!boot_pat_state) { - rdmsrl(MSR_IA32_CR_PAT, boot_pat_state); - if (!boot_pat_state) { - pat_disable("PAT read returns always zero, disabled."); - return; - } + wrmsrl(MSR_IA32_CR_PAT, pat); + +done: + pat_init_cache_modes(pat); +} + +static void pat_ap_init(u64 pat) +{ + if (!pat_enabled()) + return; + + if (!cpu_has_pat) { + /* + * If this happens we are on a secondary CPU, but switched to + * PAT on the boot CPU. We have no way to undo PAT. + */ + panic("x86/PAT: PAT enabled, but not supported by secondary CPU\n"); } wrmsrl(MSR_IA32_CR_PAT, pat); +} + +void pat_init(void) +{ + u64 pat; + struct cpuinfo_x86 *c = &boot_cpu_data; + + if (!pat_enabled()) { + /* + * No PAT. Emulate the PAT table that corresponds to the two + * cache bits, PWT (Write Through) and PCD (Cache Disable). This + * setup is the same as the BIOS default setup when the system + * has PAT but the "nopat" boot option has been specified. This + * emulated PAT table is used when MSR_IA32_CR_PAT returns 0. + * + * PTE encoding: + * + * PCD + * |PWT PAT + * || slot + * 00 0 WB : _PAGE_CACHE_MODE_WB + * 01 1 WT : _PAGE_CACHE_MODE_WT + * 10 2 UC-: _PAGE_CACHE_MODE_UC_MINUS + * 11 3 UC : _PAGE_CACHE_MODE_UC + * + * NOTE: When WC or WP is used, it is redirected to UC- per + * the default setup in __cachemode2pte_tbl[]. + */ + pat = PAT(0, WB) | PAT(1, WT) | PAT(2, UC_MINUS) | PAT(3, UC) | + PAT(4, WB) | PAT(5, WT) | PAT(6, UC_MINUS) | PAT(7, UC); - if (boot_cpu) - pat_init_cache_modes(); + } else if ((c->x86_vendor == X86_VENDOR_INTEL) && + (((c->x86 == 0x6) && (c->x86_model <= 0xd)) || + ((c->x86 == 0xf) && (c->x86_model <= 0x6)))) { + /* + * PAT support with the lower four entries. Intel Pentium 2, + * 3, M, and 4 are affected by PAT errata, which makes the + * upper four entries unusable. To be on the safe side, we don't + * use those. + * + * PTE encoding: + * PAT + * |PCD + * ||PWT PAT + * ||| slot + * 000 0 WB : _PAGE_CACHE_MODE_WB + * 001 1 WC : _PAGE_CACHE_MODE_WC + * 010 2 UC-: _PAGE_CACHE_MODE_UC_MINUS + * 011 3 UC : _PAGE_CACHE_MODE_UC + * PAT bit unused + * + * NOTE: When WT or WP is used, it is redirected to UC- per + * the default setup in __cachemode2pte_tbl[]. + */ + pat = PAT(0, WB) | PAT(1, WC) | PAT(2, UC_MINUS) | PAT(3, UC) | + PAT(4, WB) | PAT(5, WC) | PAT(6, UC_MINUS) | PAT(7, UC); + } else { + /* + * Full PAT support. We put WT in slot 7 to improve + * robustness in the presence of errata that might cause + * the high PAT bit to be ignored. This way, a buggy slot 7 + * access will hit slot 3, and slot 3 is UC, so at worst + * we lose performance without causing a correctness issue. + * Pentium 4 erratum N46 is an example for such an erratum, + * although we try not to use PAT at all on affected CPUs. + * + * PTE encoding: + * PAT + * |PCD + * ||PWT PAT + * ||| slot + * 000 0 WB : _PAGE_CACHE_MODE_WB + * 001 1 WC : _PAGE_CACHE_MODE_WC + * 010 2 UC-: _PAGE_CACHE_MODE_UC_MINUS + * 011 3 UC : _PAGE_CACHE_MODE_UC + * 100 4 WB : Reserved + * 101 5 WC : Reserved + * 110 6 UC-: Reserved + * 111 7 WT : _PAGE_CACHE_MODE_WT + * + * The reserved slots are unused, but mapped to their + * corresponding types in the presence of PAT errata. + */ + pat = PAT(0, WB) | PAT(1, WC) | PAT(2, UC_MINUS) | PAT(3, UC) | + PAT(4, WB) | PAT(5, WC) | PAT(6, UC_MINUS) | PAT(7, WT); + } + + if (!boot_cpu_done) { + pat_bsp_init(pat); + boot_cpu_done = true; + } else { + pat_ap_init(pat); + } } #undef PAT @@ -267,9 +349,9 @@ static unsigned long pat_x_mtrr_type(u64 start, u64 end, * request is for WB. */ if (req_type == _PAGE_CACHE_MODE_WB) { - u8 mtrr_type; + u8 mtrr_type, uniform; - mtrr_type = mtrr_type_lookup(start, end); + mtrr_type = mtrr_type_lookup(start, end, &uniform); if (mtrr_type != MTRR_TYPE_WRBACK) return _PAGE_CACHE_MODE_UC_MINUS; @@ -324,9 +406,14 @@ static int pat_pagerange_is_ram(resource_size_t start, resource_size_t end) /* * For RAM pages, we use page flags to mark the pages with appropriate type. - * Here we do two pass: - * - Find the memtype of all the pages in the range, look for any conflicts - * - In case of no conflicts, set the new memtype for pages in the range + * The page flags are limited to four types, WB (default), WC, WT and UC-. + * WP request fails with -EINVAL, and UC gets redirected to UC-. Setting + * a new memory type is only allowed for a page mapped with the default WB + * type. + * + * Here we do two passes: + * - Find the memtype of all the pages in the range, look for any conflicts. + * - In case of no conflicts, set the new memtype for pages in the range. */ static int reserve_ram_pages_type(u64 start, u64 end, enum page_cache_mode req_type, @@ -335,6 +422,12 @@ static int reserve_ram_pages_type(u64 start, u64 end, struct page *page; u64 pfn; + if (req_type == _PAGE_CACHE_MODE_WP) { + if (new_type) + *new_type = _PAGE_CACHE_MODE_UC_MINUS; + return -EINVAL; + } + if (req_type == _PAGE_CACHE_MODE_UC) { /* We do not support strong UC */ WARN_ON_ONCE(1); @@ -346,8 +439,8 @@ static int reserve_ram_pages_type(u64 start, u64 end, page = pfn_to_page(pfn); type = get_page_memtype(page); - if (type != -1) { - pr_info("reserve_ram_pages_type failed [mem %#010Lx-%#010Lx], track 0x%x, req 0x%x\n", + if (type != _PAGE_CACHE_MODE_WB) { + pr_info("x86/PAT: reserve_ram_pages_type failed [mem %#010Lx-%#010Lx], track 0x%x, req 0x%x\n", start, end - 1, type, req_type); if (new_type) *new_type = type; @@ -373,7 +466,7 @@ static int free_ram_pages_type(u64 start, u64 end) for (pfn = (start >> PAGE_SHIFT); pfn < (end >> PAGE_SHIFT); ++pfn) { page = pfn_to_page(pfn); - set_page_memtype(page, -1); + set_page_memtype(page, _PAGE_CACHE_MODE_WB); } return 0; } @@ -384,6 +477,7 @@ static int free_ram_pages_type(u64 start, u64 end) * - _PAGE_CACHE_MODE_WC * - _PAGE_CACHE_MODE_UC_MINUS * - _PAGE_CACHE_MODE_UC + * - _PAGE_CACHE_MODE_WT * * If new_type is NULL, function will return an error if it cannot reserve the * region with req_type. If new_type is non-NULL, function will return @@ -400,14 +494,10 @@ int reserve_memtype(u64 start, u64 end, enum page_cache_mode req_type, BUG_ON(start >= end); /* end is exclusive */ - if (!pat_enabled) { + if (!pat_enabled()) { /* This is identical to page table setting without PAT */ - if (new_type) { - if (req_type == _PAGE_CACHE_MODE_WC) - *new_type = _PAGE_CACHE_MODE_UC_MINUS; - else - *new_type = req_type; - } + if (new_type) + *new_type = req_type; return 0; } @@ -451,9 +541,9 @@ int reserve_memtype(u64 start, u64 end, enum page_cache_mode req_type, err = rbt_memtype_check_insert(new, new_type); if (err) { - printk(KERN_INFO "reserve_memtype failed [mem %#010Lx-%#010Lx], track %s, req %s\n", - start, end - 1, - cattr_name(new->type), cattr_name(req_type)); + pr_info("x86/PAT: reserve_memtype failed [mem %#010Lx-%#010Lx], track %s, req %s\n", + start, end - 1, + cattr_name(new->type), cattr_name(req_type)); kfree(new); spin_unlock(&memtype_lock); @@ -475,7 +565,7 @@ int free_memtype(u64 start, u64 end) int is_range_ram; struct memtype *entry; - if (!pat_enabled) + if (!pat_enabled()) return 0; /* Low ISA region is always mapped WB. No need to track */ @@ -497,8 +587,8 @@ int free_memtype(u64 start, u64 end) spin_unlock(&memtype_lock); if (!entry) { - printk(KERN_INFO "%s:%d freeing invalid memtype [mem %#010Lx-%#010Lx]\n", - current->comm, current->pid, start, end - 1); + pr_info("x86/PAT: %s:%d freeing invalid memtype [mem %#010Lx-%#010Lx]\n", + current->comm, current->pid, start, end - 1); return -EINVAL; } @@ -517,7 +607,7 @@ int free_memtype(u64 start, u64 end) * Only to be called when PAT is enabled * * Returns _PAGE_CACHE_MODE_WB, _PAGE_CACHE_MODE_WC, _PAGE_CACHE_MODE_UC_MINUS - * or _PAGE_CACHE_MODE_UC + * or _PAGE_CACHE_MODE_WT. */ static enum page_cache_mode lookup_memtype(u64 paddr) { @@ -529,16 +619,9 @@ static enum page_cache_mode lookup_memtype(u64 paddr) if (pat_pagerange_is_ram(paddr, paddr + PAGE_SIZE)) { struct page *page; - page = pfn_to_page(paddr >> PAGE_SHIFT); - rettype = get_page_memtype(page); - /* - * -1 from get_page_memtype() implies RAM page is in its - * default state and not reserved, and hence of type WB - */ - if (rettype == -1) - rettype = _PAGE_CACHE_MODE_WB; - return rettype; + page = pfn_to_page(paddr >> PAGE_SHIFT); + return get_page_memtype(page); } spin_lock(&memtype_lock); @@ -623,13 +706,13 @@ static inline int range_is_allowed(unsigned long pfn, unsigned long size) u64 to = from + size; u64 cursor = from; - if (!pat_enabled) + if (!pat_enabled()) return 1; while (cursor < to) { if (!devmem_is_allowed(pfn)) { - printk(KERN_INFO "Program %s tried to access /dev/mem between [mem %#010Lx-%#010Lx], PAT prevents it\n", - current->comm, from, to - 1); + pr_info("x86/PAT: Program %s tried to access /dev/mem between [mem %#010Lx-%#010Lx], PAT prevents it\n", + current->comm, from, to - 1); return 0; } cursor += PAGE_SIZE; @@ -659,7 +742,7 @@ int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn, * caching for the high addresses through the KEN pin, but * we maintain the tradition of paranoia in this code. */ - if (!pat_enabled && + if (!pat_enabled() && !(boot_cpu_has(X86_FEATURE_MTRR) || boot_cpu_has(X86_FEATURE_K6_MTRR) || boot_cpu_has(X86_FEATURE_CYRIX_ARR) || @@ -698,8 +781,7 @@ int kernel_map_sync_memtype(u64 base, unsigned long size, size; if (ioremap_change_attr((unsigned long)__va(base), id_sz, pcm) < 0) { - printk(KERN_INFO "%s:%d ioremap_change_attr failed %s " - "for [mem %#010Lx-%#010Lx]\n", + pr_info("x86/PAT: %s:%d ioremap_change_attr failed %s for [mem %#010Lx-%#010Lx]\n", current->comm, current->pid, cattr_name(pcm), base, (unsigned long long)(base + size-1)); @@ -729,12 +811,12 @@ static int reserve_pfn_range(u64 paddr, unsigned long size, pgprot_t *vma_prot, * the type requested matches the type of first page in the range. */ if (is_ram) { - if (!pat_enabled) + if (!pat_enabled()) return 0; pcm = lookup_memtype(paddr); if (want_pcm != pcm) { - printk(KERN_WARNING "%s:%d map pfn RAM range req %s for [mem %#010Lx-%#010Lx], got %s\n", + pr_warn("x86/PAT: %s:%d map pfn RAM range req %s for [mem %#010Lx-%#010Lx], got %s\n", current->comm, current->pid, cattr_name(want_pcm), (unsigned long long)paddr, @@ -755,13 +837,12 @@ static int reserve_pfn_range(u64 paddr, unsigned long size, pgprot_t *vma_prot, if (strict_prot || !is_new_memtype_allowed(paddr, size, want_pcm, pcm)) { free_memtype(paddr, paddr + size); - printk(KERN_ERR "%s:%d map pfn expected mapping type %s" - " for [mem %#010Lx-%#010Lx], got %s\n", - current->comm, current->pid, - cattr_name(want_pcm), - (unsigned long long)paddr, - (unsigned long long)(paddr + size - 1), - cattr_name(pcm)); + pr_err("x86/PAT: %s:%d map pfn expected mapping type %s for [mem %#010Lx-%#010Lx], got %s\n", + current->comm, current->pid, + cattr_name(want_pcm), + (unsigned long long)paddr, + (unsigned long long)(paddr + size - 1), + cattr_name(pcm)); return -EINVAL; } /* @@ -844,7 +925,7 @@ int track_pfn_remap(struct vm_area_struct *vma, pgprot_t *prot, return ret; } - if (!pat_enabled) + if (!pat_enabled()) return 0; /* @@ -872,7 +953,7 @@ int track_pfn_insert(struct vm_area_struct *vma, pgprot_t *prot, { enum page_cache_mode pcm; - if (!pat_enabled) + if (!pat_enabled()) return 0; /* Set prot based on lookup */ @@ -913,14 +994,18 @@ void untrack_pfn(struct vm_area_struct *vma, unsigned long pfn, pgprot_t pgprot_writecombine(pgprot_t prot) { - if (pat_enabled) - return __pgprot(pgprot_val(prot) | + return __pgprot(pgprot_val(prot) | cachemode2protval(_PAGE_CACHE_MODE_WC)); - else - return pgprot_noncached(prot); } EXPORT_SYMBOL_GPL(pgprot_writecombine); +pgprot_t pgprot_writethrough(pgprot_t prot) +{ + return __pgprot(pgprot_val(prot) | + cachemode2protval(_PAGE_CACHE_MODE_WT)); +} +EXPORT_SYMBOL_GPL(pgprot_writethrough); + #if defined(CONFIG_DEBUG_FS) && defined(CONFIG_X86_PAT) static struct memtype *memtype_get_idx(loff_t pos) @@ -996,7 +1081,7 @@ static const struct file_operations memtype_fops = { static int __init pat_memtype_list_init(void) { - if (pat_enabled) { + if (pat_enabled()) { debugfs_create_file("pat_memtype_list", S_IRUSR, arch_debugfs_dir, NULL, &memtype_fops); } diff --git a/arch/x86/mm/pat_internal.h b/arch/x86/mm/pat_internal.h index f641162..a739bfc 100644 --- a/arch/x86/mm/pat_internal.h +++ b/arch/x86/mm/pat_internal.h @@ -4,7 +4,7 @@ extern int pat_debug_enable; #define dprintk(fmt, arg...) \ - do { if (pat_debug_enable) printk(KERN_INFO fmt, ##arg); } while (0) + do { if (pat_debug_enable) pr_info("x86/PAT: " fmt, ##arg); } while (0) struct memtype { u64 start; diff --git a/arch/x86/mm/pat_rbtree.c b/arch/x86/mm/pat_rbtree.c index 6582adc..6393108 100644 --- a/arch/x86/mm/pat_rbtree.c +++ b/arch/x86/mm/pat_rbtree.c @@ -160,9 +160,9 @@ success: return 0; failure: - printk(KERN_INFO "%s:%d conflicting memory types " - "%Lx-%Lx %s<->%s\n", current->comm, current->pid, start, - end, cattr_name(found_type), cattr_name(match->type)); + pr_info("x86/PAT: %s:%d conflicting memory types %Lx-%Lx %s<->%s\n", + current->comm, current->pid, start, end, + cattr_name(found_type), cattr_name(match->type)); return -EBUSY; } diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c index 0b97d2c..fb0a9dd 100644 --- a/arch/x86/mm/pgtable.c +++ b/arch/x86/mm/pgtable.c @@ -563,16 +563,31 @@ void native_set_fixmap(enum fixed_addresses idx, phys_addr_t phys, } #ifdef CONFIG_HAVE_ARCH_HUGE_VMAP +/** + * pud_set_huge - setup kernel PUD mapping + * + * MTRRs can override PAT memory types with 4KiB granularity. Therefore, this + * function sets up a huge page only if any of the following conditions are met: + * + * - MTRRs are disabled, or + * + * - MTRRs are enabled and the range is completely covered by a single MTRR, or + * + * - MTRRs are enabled and the corresponding MTRR memory type is WB, which + * has no effect on the requested PAT memory type. + * + * Callers should try to decrease page size (1GB -> 2MB -> 4K) if the bigger + * page mapping attempt fails. + * + * Returns 1 on success and 0 on failure. + */ int pud_set_huge(pud_t *pud, phys_addr_t addr, pgprot_t prot) { - u8 mtrr; + u8 mtrr, uniform; - /* - * Do not use a huge page when the range is covered by non-WB type - * of MTRRs. - */ - mtrr = mtrr_type_lookup(addr, addr + PUD_SIZE); - if ((mtrr != MTRR_TYPE_WRBACK) && (mtrr != 0xFF)) + mtrr = mtrr_type_lookup(addr, addr + PUD_SIZE, &uniform); + if ((mtrr != MTRR_TYPE_INVALID) && (!uniform) && + (mtrr != MTRR_TYPE_WRBACK)) return 0; prot = pgprot_4k_2_large(prot); @@ -584,17 +599,24 @@ int pud_set_huge(pud_t *pud, phys_addr_t addr, pgprot_t prot) return 1; } +/** + * pmd_set_huge - setup kernel PMD mapping + * + * See text over pud_set_huge() above. + * + * Returns 1 on success and 0 on failure. + */ int pmd_set_huge(pmd_t *pmd, phys_addr_t addr, pgprot_t prot) { - u8 mtrr; + u8 mtrr, uniform; - /* - * Do not use a huge page when the range is covered by non-WB type - * of MTRRs. - */ - mtrr = mtrr_type_lookup(addr, addr + PMD_SIZE); - if ((mtrr != MTRR_TYPE_WRBACK) && (mtrr != 0xFF)) + mtrr = mtrr_type_lookup(addr, addr + PMD_SIZE, &uniform); + if ((mtrr != MTRR_TYPE_INVALID) && (!uniform) && + (mtrr != MTRR_TYPE_WRBACK)) { + pr_warn_once("%s: Cannot satisfy [mem %#010llx-%#010llx] with a huge-page mapping due to MTRR override.\n", + __func__, addr, addr + PMD_SIZE); return 0; + } prot = pgprot_4k_2_large(prot); @@ -605,6 +627,11 @@ int pmd_set_huge(pmd_t *pmd, phys_addr_t addr, pgprot_t prot) return 1; } +/** + * pud_clear_huge - clear kernel PUD mapping when it is set + * + * Returns 1 on success and 0 on failure (no PUD map is found). + */ int pud_clear_huge(pud_t *pud) { if (pud_large(*pud)) { @@ -615,6 +642,11 @@ int pud_clear_huge(pud_t *pud) return 0; } +/** + * pmd_clear_huge - clear kernel PMD mapping when it is set + * + * Returns 1 on success and 0 on failure (no PMD map is found). + */ int pmd_clear_huge(pmd_t *pmd) { if (pmd_large(*pmd)) { diff --git a/arch/x86/net/bpf_jit.S b/arch/x86/net/bpf_jit.S index 6440221..4093216 100644 --- a/arch/x86/net/bpf_jit.S +++ b/arch/x86/net/bpf_jit.S @@ -8,7 +8,6 @@ * of the License. */ #include <linux/linkage.h> -#include <asm/dwarf2.h> /* * Calling convention : diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c index 349c0d3..0a9f2ca 100644 --- a/arch/x86/pci/i386.c +++ b/arch/x86/pci/i386.c @@ -429,12 +429,12 @@ int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma, * Caller can followup with UC MINUS request and add a WC mtrr if there * is a free mtrr slot. */ - if (!pat_enabled && write_combine) + if (!pat_enabled() && write_combine) return -EINVAL; - if (pat_enabled && write_combine) + if (pat_enabled() && write_combine) prot |= cachemode2protval(_PAGE_CACHE_MODE_WC); - else if (pat_enabled || boot_cpu_data.x86 > 3) + else if (pat_enabled() || boot_cpu_data.x86 > 3) /* * ioremap() and ioremap_nocache() defaults to UC MINUS for now. * To avoid attribute conflicts, request UC MINUS here diff --git a/arch/x86/pci/intel_mid_pci.c b/arch/x86/pci/intel_mid_pci.c index 852aa4c..2706230 100644 --- a/arch/x86/pci/intel_mid_pci.c +++ b/arch/x86/pci/intel_mid_pci.c @@ -208,6 +208,7 @@ static int pci_write(struct pci_bus *bus, unsigned int devfn, int where, static int intel_mid_pci_irq_enable(struct pci_dev *dev) { + struct irq_alloc_info info; int polarity; if (dev->irq_managed && dev->irq > 0) @@ -217,14 +218,13 @@ static int intel_mid_pci_irq_enable(struct pci_dev *dev) polarity = 0; /* active high */ else polarity = 1; /* active low */ + ioapic_set_alloc_attr(&info, dev_to_node(&dev->dev), 1, polarity); /* * MRST only have IOAPIC, the PCI irq lines are 1:1 mapped to * IOAPIC RTE entries, so we just enable RTE for the device. */ - if (mp_set_gsi_attr(dev->irq, 1, polarity, dev_to_node(&dev->dev))) - return -EBUSY; - if (mp_map_gsi_to_irq(dev->irq, IOAPIC_MAP_ALLOC) < 0) + if (mp_map_gsi_to_irq(dev->irq, IOAPIC_MAP_ALLOC, &info) < 0) return -EBUSY; dev->irq_managed = 1; diff --git a/arch/x86/pci/irq.c b/arch/x86/pci/irq.c index 5dc6ca5..9bd1154 100644 --- a/arch/x86/pci/irq.c +++ b/arch/x86/pci/irq.c @@ -146,19 +146,20 @@ static void __init pirq_peer_trick(void) /* * Code for querying and setting of IRQ routes on various interrupt routers. + * PIC Edge/Level Control Registers (ELCR) 0x4d0 & 0x4d1. */ -void eisa_set_level_irq(unsigned int irq) +void elcr_set_level_irq(unsigned int irq) { unsigned char mask = 1 << (irq & 7); unsigned int port = 0x4d0 + (irq >> 3); unsigned char val; - static u16 eisa_irq_mask; + static u16 elcr_irq_mask; - if (irq >= 16 || (1 << irq) & eisa_irq_mask) + if (irq >= 16 || (1 << irq) & elcr_irq_mask) return; - eisa_irq_mask |= (1 << irq); + elcr_irq_mask |= (1 << irq); printk(KERN_DEBUG "PCI: setting IRQ %u as level-triggered\n", irq); val = inb(port); if (!(val & mask)) { @@ -965,11 +966,11 @@ static int pcibios_lookup_irq(struct pci_dev *dev, int assign) } else if (r->get && (irq = r->get(pirq_router_dev, dev, pirq)) && \ ((!(pci_probe & PCI_USE_PIRQ_MASK)) || ((1 << irq) & mask))) { msg = "found"; - eisa_set_level_irq(irq); + elcr_set_level_irq(irq); } else if (newirq && r->set && (dev->class >> 8) != PCI_CLASS_DISPLAY_VGA) { if (r->set(pirq_router_dev, dev, pirq, newirq)) { - eisa_set_level_irq(newirq); + elcr_set_level_irq(newirq); msg = "assigned"; irq = newirq; } diff --git a/arch/x86/platform/Makefile b/arch/x86/platform/Makefile index a62e0be..f1a6c8e 100644 --- a/arch/x86/platform/Makefile +++ b/arch/x86/platform/Makefile @@ -1,4 +1,5 @@ # Platform specific code goes here +obj-y += atom/ obj-y += ce4100/ obj-y += efi/ obj-y += geode/ diff --git a/arch/x86/platform/atom/Makefile b/arch/x86/platform/atom/Makefile new file mode 100644 index 0000000..0a3a40c --- /dev/null +++ b/arch/x86/platform/atom/Makefile @@ -0,0 +1 @@ +obj-$(CONFIG_PUNIT_ATOM_DEBUG) += punit_atom_debug.o diff --git a/arch/x86/platform/atom/punit_atom_debug.c b/arch/x86/platform/atom/punit_atom_debug.c new file mode 100644 index 0000000..5ca8ead --- /dev/null +++ b/arch/x86/platform/atom/punit_atom_debug.c @@ -0,0 +1,183 @@ +/* + * Intel SOC Punit device state debug driver + * Punit controls power management for North Complex devices (Graphics + * blocks, Image Signal Processing, video processing, display, DSP etc.) + * + * Copyright (c) 2015, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/device.h> +#include <linux/debugfs.h> +#include <linux/seq_file.h> +#include <linux/io.h> +#include <asm/cpu_device_id.h> +#include <asm/iosf_mbi.h> + +/* Side band Interface port */ +#define PUNIT_PORT 0x04 +/* Power gate status reg */ +#define PWRGT_STATUS 0x61 +/* Subsystem config/status Video processor */ +#define VED_SS_PM0 0x32 +/* Subsystem config/status ISP (Image Signal Processor) */ +#define ISP_SS_PM0 0x39 +/* Subsystem config/status Input/output controller */ +#define MIO_SS_PM 0x3B +/* Shift bits for getting status for video, isp and i/o */ +#define SSS_SHIFT 24 +/* Shift bits for getting status for graphics rendering */ +#define RENDER_POS 0 +/* Shift bits for getting status for media control */ +#define MEDIA_POS 2 +/* Shift bits for getting status for Valley View/Baytrail display */ +#define VLV_DISPLAY_POS 6 +/* Subsystem config/status display for Cherry Trail SOC */ +#define CHT_DSP_SSS 0x36 +/* Shift bits for getting status for display */ +#define CHT_DSP_SSS_POS 16 + +struct punit_device { + char *name; + int reg; + int sss_pos; +}; + +static const struct punit_device punit_device_byt[] = { + { "GFX RENDER", PWRGT_STATUS, RENDER_POS }, + { "GFX MEDIA", PWRGT_STATUS, MEDIA_POS }, + { "DISPLAY", PWRGT_STATUS, VLV_DISPLAY_POS }, + { "VED", VED_SS_PM0, SSS_SHIFT }, + { "ISP", ISP_SS_PM0, SSS_SHIFT }, + { "MIO", MIO_SS_PM, SSS_SHIFT }, + { NULL } +}; + +static const struct punit_device punit_device_cht[] = { + { "GFX RENDER", PWRGT_STATUS, RENDER_POS }, + { "GFX MEDIA", PWRGT_STATUS, MEDIA_POS }, + { "DISPLAY", CHT_DSP_SSS, CHT_DSP_SSS_POS }, + { "VED", VED_SS_PM0, SSS_SHIFT }, + { "ISP", ISP_SS_PM0, SSS_SHIFT }, + { "MIO", MIO_SS_PM, SSS_SHIFT }, + { NULL } +}; + +static const char * const dstates[] = {"D0", "D0i1", "D0i2", "D0i3"}; + +static int punit_dev_state_show(struct seq_file *seq_file, void *unused) +{ + u32 punit_pwr_status; + struct punit_device *punit_devp = seq_file->private; + int index; + int status; + + seq_puts(seq_file, "\n\nPUNIT NORTH COMPLEX DEVICES :\n"); + while (punit_devp->name) { + status = iosf_mbi_read(PUNIT_PORT, BT_MBI_PMC_READ, + punit_devp->reg, + &punit_pwr_status); + if (status) { + seq_printf(seq_file, "%9s : Read Failed\n", + punit_devp->name); + } else { + index = (punit_pwr_status >> punit_devp->sss_pos) & 3; + seq_printf(seq_file, "%9s : %s\n", punit_devp->name, + dstates[index]); + } + punit_devp++; + } + + return 0; +} + +static int punit_dev_state_open(struct inode *inode, struct file *file) +{ + return single_open(file, punit_dev_state_show, inode->i_private); +} + +static const struct file_operations punit_dev_state_ops = { + .open = punit_dev_state_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static struct dentry *punit_dbg_file; + +static int punit_dbgfs_register(struct punit_device *punit_device) +{ + static struct dentry *dev_state; + + punit_dbg_file = debugfs_create_dir("punit_atom", NULL); + if (!punit_dbg_file) + return -ENXIO; + + dev_state = debugfs_create_file("dev_power_state", S_IFREG | S_IRUGO, + punit_dbg_file, punit_device, + &punit_dev_state_ops); + if (!dev_state) { + pr_err("punit_dev_state register failed\n"); + debugfs_remove(punit_dbg_file); + return -ENXIO; + } + + return 0; +} + +static void punit_dbgfs_unregister(void) +{ + debugfs_remove_recursive(punit_dbg_file); +} + +#define ICPU(model, drv_data) \ + { X86_VENDOR_INTEL, 6, model, X86_FEATURE_MWAIT,\ + (kernel_ulong_t)&drv_data } + +static const struct x86_cpu_id intel_punit_cpu_ids[] = { + ICPU(55, punit_device_byt), /* Valleyview, Bay Trail */ + ICPU(76, punit_device_cht), /* Braswell, Cherry Trail */ + {} +}; + +MODULE_DEVICE_TABLE(x86cpu, intel_punit_cpu_ids); + +static int __init punit_atom_debug_init(void) +{ + const struct x86_cpu_id *id; + int ret; + + id = x86_match_cpu(intel_punit_cpu_ids); + if (!id) + return -ENODEV; + + ret = punit_dbgfs_register((struct punit_device *)id->driver_data); + if (ret < 0) + return ret; + + return 0; +} + +static void __exit punit_atom_debug_exit(void) +{ + punit_dbgfs_unregister(); +} + +module_init(punit_atom_debug_init); +module_exit(punit_atom_debug_exit); + +MODULE_AUTHOR("Kumar P, Mahesh <mahesh.kumar.p@intel.com>"); +MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>"); +MODULE_DESCRIPTION("Driver for Punit devices states debugging"); +MODULE_LICENSE("GPL v2"); diff --git a/arch/x86/platform/intel-mid/device_libs/platform_wdt.c b/arch/x86/platform/intel-mid/device_libs/platform_wdt.c index 0b283d4..de73413 100644 --- a/arch/x86/platform/intel-mid/device_libs/platform_wdt.c +++ b/arch/x86/platform/intel-mid/device_libs/platform_wdt.c @@ -27,6 +27,7 @@ static struct platform_device wdt_dev = { static int tangier_probe(struct platform_device *pdev) { int gsi; + struct irq_alloc_info info; struct intel_mid_wdt_pdata *pdata = pdev->dev.platform_data; if (!pdata) @@ -34,8 +35,8 @@ static int tangier_probe(struct platform_device *pdev) /* IOAPIC builds identity mapping between GSI and IRQ on MID */ gsi = pdata->irq; - if (mp_set_gsi_attr(gsi, 1, 0, cpu_to_node(0)) || - mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC) <= 0) { + ioapic_set_alloc_attr(&info, cpu_to_node(0), 1, 0); + if (mp_map_gsi_to_irq(gsi, IOAPIC_MAP_ALLOC, &info) <= 0) { dev_warn(&pdev->dev, "cannot find interrupt %d in ioapic\n", gsi); return -EINVAL; diff --git a/arch/x86/platform/intel-mid/intel-mid.c b/arch/x86/platform/intel-mid/intel-mid.c index 3005f0c..01d54ea 100644 --- a/arch/x86/platform/intel-mid/intel-mid.c +++ b/arch/x86/platform/intel-mid/intel-mid.c @@ -81,26 +81,34 @@ static unsigned long __init intel_mid_calibrate_tsc(void) return 0; } +static void __init intel_mid_setup_bp_timer(void) +{ + apbt_time_init(); + setup_boot_APIC_clock(); +} + static void __init intel_mid_time_init(void) { sfi_table_parse(SFI_SIG_MTMR, NULL, NULL, sfi_parse_mtmr); + switch (intel_mid_timer_options) { case INTEL_MID_TIMER_APBT_ONLY: break; case INTEL_MID_TIMER_LAPIC_APBT: - x86_init.timers.setup_percpu_clockev = setup_boot_APIC_clock; + /* Use apbt and local apic */ + x86_init.timers.setup_percpu_clockev = intel_mid_setup_bp_timer; x86_cpuinit.setup_percpu_clockev = setup_secondary_APIC_clock; - break; + return; default: if (!boot_cpu_has(X86_FEATURE_ARAT)) break; + /* Lapic only, no apbt */ x86_init.timers.setup_percpu_clockev = setup_boot_APIC_clock; x86_cpuinit.setup_percpu_clockev = setup_secondary_APIC_clock; return; } - /* we need at least one APB timer */ - pre_init_apic_IRQ0(); - apbt_time_init(); + + x86_init.timers.setup_percpu_clockev = apbt_time_init; } static void intel_mid_arch_setup(void) diff --git a/arch/x86/platform/intel-mid/sfi.c b/arch/x86/platform/intel-mid/sfi.c index c14ad34..ce992e8 100644 --- a/arch/x86/platform/intel-mid/sfi.c +++ b/arch/x86/platform/intel-mid/sfi.c @@ -95,18 +95,16 @@ int __init sfi_parse_mtmr(struct sfi_table_header *table) pr_debug("timer[%d]: paddr = 0x%08x, freq = %dHz, irq = %d\n", totallen, (u32)pentry->phys_addr, pentry->freq_hz, pentry->irq); - if (!pentry->irq) - continue; - mp_irq.type = MP_INTSRC; - mp_irq.irqtype = mp_INT; -/* triggering mode edge bit 2-3, active high polarity bit 0-1 */ - mp_irq.irqflag = 5; - mp_irq.srcbus = MP_BUS_ISA; - mp_irq.srcbusirq = pentry->irq; /* IRQ */ - mp_irq.dstapic = MP_APIC_ALL; - mp_irq.dstirq = pentry->irq; - mp_save_irq(&mp_irq); - mp_map_gsi_to_irq(pentry->irq, IOAPIC_MAP_ALLOC); + mp_irq.type = MP_INTSRC; + mp_irq.irqtype = mp_INT; + /* triggering mode edge bit 2-3, active high polarity bit 0-1 */ + mp_irq.irqflag = 5; + mp_irq.srcbus = MP_BUS_ISA; + mp_irq.srcbusirq = pentry->irq; /* IRQ */ + mp_irq.dstapic = MP_APIC_ALL; + mp_irq.dstirq = pentry->irq; + mp_save_irq(&mp_irq); + mp_map_gsi_to_irq(pentry->irq, IOAPIC_MAP_ALLOC, NULL); } return 0; @@ -177,7 +175,7 @@ int __init sfi_parse_mrtc(struct sfi_table_header *table) mp_irq.dstapic = MP_APIC_ALL; mp_irq.dstirq = pentry->irq; mp_save_irq(&mp_irq); - mp_map_gsi_to_irq(pentry->irq, IOAPIC_MAP_ALLOC); + mp_map_gsi_to_irq(pentry->irq, IOAPIC_MAP_ALLOC, NULL); } return 0; } @@ -436,6 +434,7 @@ static int __init sfi_parse_devs(struct sfi_table_header *table) struct devs_id *dev = NULL; int num, i, ret; int polarity; + struct irq_alloc_info info; sb = (struct sfi_table_simple *)table; num = SFI_GET_NUM_ENTRIES(sb, struct sfi_device_table_entry); @@ -469,9 +468,8 @@ static int __init sfi_parse_devs(struct sfi_table_header *table) polarity = 1; } - ret = mp_set_gsi_attr(irq, 1, polarity, NUMA_NO_NODE); - if (ret == 0) - ret = mp_map_gsi_to_irq(irq, IOAPIC_MAP_ALLOC); + ioapic_set_alloc_attr(&info, NUMA_NO_NODE, 1, polarity); + ret = mp_map_gsi_to_irq(irq, IOAPIC_MAP_ALLOC, &info); WARN_ON(ret < 0); } diff --git a/arch/x86/platform/sfi/sfi.c b/arch/x86/platform/sfi/sfi.c index 2a8a74f..6c7111b 100644 --- a/arch/x86/platform/sfi/sfi.c +++ b/arch/x86/platform/sfi/sfi.c @@ -25,8 +25,8 @@ #include <linux/init.h> #include <linux/sfi.h> #include <linux/io.h> -#include <linux/irqdomain.h> +#include <asm/irqdomain.h> #include <asm/io_apic.h> #include <asm/mpspec.h> #include <asm/setup.h> @@ -71,9 +71,6 @@ static int __init sfi_parse_cpus(struct sfi_table_header *table) #endif /* CONFIG_X86_LOCAL_APIC */ #ifdef CONFIG_X86_IO_APIC -static struct irq_domain_ops sfi_ioapic_irqdomain_ops = { - .map = mp_irqdomain_map, -}; static int __init sfi_parse_ioapic(struct sfi_table_header *table) { @@ -82,7 +79,7 @@ static int __init sfi_parse_ioapic(struct sfi_table_header *table) int i, num; struct ioapic_domain_cfg cfg = { .type = IOAPIC_DOMAIN_STRICT, - .ops = &sfi_ioapic_irqdomain_ops, + .ops = &mp_ioapic_irqdomain_ops, }; sb = (struct sfi_table_simple *)table; diff --git a/arch/x86/platform/uv/uv_irq.c b/arch/x86/platform/uv/uv_irq.c index 0ce6736..8570abe 100644 --- a/arch/x86/platform/uv/uv_irq.c +++ b/arch/x86/platform/uv/uv_irq.c @@ -13,22 +13,37 @@ #include <linux/slab.h> #include <linux/irq.h> +#include <asm/irqdomain.h> #include <asm/apic.h> #include <asm/uv/uv_irq.h> #include <asm/uv/uv_hub.h> /* MMR offset and pnode of hub sourcing interrupts for a given irq */ -struct uv_irq_2_mmr_pnode{ - struct rb_node list; +struct uv_irq_2_mmr_pnode { unsigned long offset; int pnode; - int irq; }; -static DEFINE_SPINLOCK(uv_irq_lock); -static struct rb_root uv_irq_root; +static void uv_program_mmr(struct irq_cfg *cfg, struct uv_irq_2_mmr_pnode *info) +{ + unsigned long mmr_value; + struct uv_IO_APIC_route_entry *entry; + + BUILD_BUG_ON(sizeof(struct uv_IO_APIC_route_entry) != + sizeof(unsigned long)); + + mmr_value = 0; + entry = (struct uv_IO_APIC_route_entry *)&mmr_value; + entry->vector = cfg->vector; + entry->delivery_mode = apic->irq_delivery_mode; + entry->dest_mode = apic->irq_dest_mode; + entry->polarity = 0; + entry->trigger = 0; + entry->mask = 0; + entry->dest = cfg->dest_apicid; -static int uv_set_irq_affinity(struct irq_data *, const struct cpumask *, bool); + uv_write_global_mmr64(info->pnode, info->offset, mmr_value); +} static void uv_noop(struct irq_data *data) { } @@ -37,6 +52,23 @@ static void uv_ack_apic(struct irq_data *data) ack_APIC_irq(); } +static int +uv_set_irq_affinity(struct irq_data *data, const struct cpumask *mask, + bool force) +{ + struct irq_data *parent = data->parent_data; + struct irq_cfg *cfg = irqd_cfg(data); + int ret; + + ret = parent->chip->irq_set_affinity(parent, mask, force); + if (ret >= 0) { + uv_program_mmr(cfg, data->chip_data); + send_cleanup_vector(cfg); + } + + return ret; +} + static struct irq_chip uv_irq_chip = { .name = "UV-CORE", .irq_mask = uv_noop, @@ -45,189 +77,99 @@ static struct irq_chip uv_irq_chip = { .irq_set_affinity = uv_set_irq_affinity, }; -/* - * Add offset and pnode information of the hub sourcing interrupts to the - * rb tree for a specific irq. - */ -static int uv_set_irq_2_mmr_info(int irq, unsigned long offset, unsigned blade) +static int uv_domain_alloc(struct irq_domain *domain, unsigned int virq, + unsigned int nr_irqs, void *arg) { - struct rb_node **link = &uv_irq_root.rb_node; - struct rb_node *parent = NULL; - struct uv_irq_2_mmr_pnode *n; - struct uv_irq_2_mmr_pnode *e; - unsigned long irqflags; - - n = kmalloc_node(sizeof(struct uv_irq_2_mmr_pnode), GFP_KERNEL, - uv_blade_to_memory_nid(blade)); - if (!n) + struct uv_irq_2_mmr_pnode *chip_data; + struct irq_alloc_info *info = arg; + struct irq_data *irq_data = irq_domain_get_irq_data(domain, virq); + int ret; + + if (nr_irqs > 1 || !info || info->type != X86_IRQ_ALLOC_TYPE_UV) + return -EINVAL; + + chip_data = kmalloc_node(sizeof(*chip_data), GFP_KERNEL, + irq_data->node); + if (!chip_data) return -ENOMEM; - n->irq = irq; - n->offset = offset; - n->pnode = uv_blade_to_pnode(blade); - spin_lock_irqsave(&uv_irq_lock, irqflags); - /* Find the right place in the rbtree: */ - while (*link) { - parent = *link; - e = rb_entry(parent, struct uv_irq_2_mmr_pnode, list); - - if (unlikely(irq == e->irq)) { - /* irq entry exists */ - e->pnode = uv_blade_to_pnode(blade); - e->offset = offset; - spin_unlock_irqrestore(&uv_irq_lock, irqflags); - kfree(n); - return 0; - } - - if (irq < e->irq) - link = &(*link)->rb_left; + ret = irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, arg); + if (ret >= 0) { + if (info->uv_limit == UV_AFFINITY_CPU) + irq_set_status_flags(virq, IRQ_NO_BALANCING); else - link = &(*link)->rb_right; + irq_set_status_flags(virq, IRQ_MOVE_PCNTXT); + + chip_data->pnode = uv_blade_to_pnode(info->uv_blade); + chip_data->offset = info->uv_offset; + irq_domain_set_info(domain, virq, virq, &uv_irq_chip, chip_data, + handle_percpu_irq, NULL, info->uv_name); + } else { + kfree(chip_data); } - /* Insert the node into the rbtree. */ - rb_link_node(&n->list, parent, link); - rb_insert_color(&n->list, &uv_irq_root); - - spin_unlock_irqrestore(&uv_irq_lock, irqflags); - return 0; + return ret; } -/* Retrieve offset and pnode information from the rb tree for a specific irq */ -int uv_irq_2_mmr_info(int irq, unsigned long *offset, int *pnode) +static void uv_domain_free(struct irq_domain *domain, unsigned int virq, + unsigned int nr_irqs) { - struct uv_irq_2_mmr_pnode *e; - struct rb_node *n; - unsigned long irqflags; - - spin_lock_irqsave(&uv_irq_lock, irqflags); - n = uv_irq_root.rb_node; - while (n) { - e = rb_entry(n, struct uv_irq_2_mmr_pnode, list); - - if (e->irq == irq) { - *offset = e->offset; - *pnode = e->pnode; - spin_unlock_irqrestore(&uv_irq_lock, irqflags); - return 0; - } - - if (irq < e->irq) - n = n->rb_left; - else - n = n->rb_right; - } - spin_unlock_irqrestore(&uv_irq_lock, irqflags); - return -1; + struct irq_data *irq_data = irq_domain_get_irq_data(domain, virq); + + BUG_ON(nr_irqs != 1); + kfree(irq_data->chip_data); + irq_clear_status_flags(virq, IRQ_MOVE_PCNTXT); + irq_clear_status_flags(virq, IRQ_NO_BALANCING); + irq_domain_free_irqs_top(domain, virq, nr_irqs); } /* * Re-target the irq to the specified CPU and enable the specified MMR located * on the specified blade to allow the sending of MSIs to the specified CPU. */ -static int -arch_enable_uv_irq(char *irq_name, unsigned int irq, int cpu, int mmr_blade, - unsigned long mmr_offset, int limit) +static void uv_domain_activate(struct irq_domain *domain, + struct irq_data *irq_data) { - const struct cpumask *eligible_cpu = cpumask_of(cpu); - struct irq_cfg *cfg = irq_cfg(irq); - unsigned long mmr_value; - struct uv_IO_APIC_route_entry *entry; - int mmr_pnode, err; - unsigned int dest; - - BUILD_BUG_ON(sizeof(struct uv_IO_APIC_route_entry) != - sizeof(unsigned long)); - - err = assign_irq_vector(irq, cfg, eligible_cpu); - if (err != 0) - return err; - - err = apic->cpu_mask_to_apicid_and(eligible_cpu, eligible_cpu, &dest); - if (err != 0) - return err; - - if (limit == UV_AFFINITY_CPU) - irq_set_status_flags(irq, IRQ_NO_BALANCING); - else - irq_set_status_flags(irq, IRQ_MOVE_PCNTXT); - - irq_set_chip_and_handler_name(irq, &uv_irq_chip, handle_percpu_irq, - irq_name); - - mmr_value = 0; - entry = (struct uv_IO_APIC_route_entry *)&mmr_value; - entry->vector = cfg->vector; - entry->delivery_mode = apic->irq_delivery_mode; - entry->dest_mode = apic->irq_dest_mode; - entry->polarity = 0; - entry->trigger = 0; - entry->mask = 0; - entry->dest = dest; - - mmr_pnode = uv_blade_to_pnode(mmr_blade); - uv_write_global_mmr64(mmr_pnode, mmr_offset, mmr_value); - - if (cfg->move_in_progress) - send_cleanup_vector(cfg); - - return irq; + uv_program_mmr(irqd_cfg(irq_data), irq_data->chip_data); } /* * Disable the specified MMR located on the specified blade so that MSIs are * longer allowed to be sent. */ -static void arch_disable_uv_irq(int mmr_pnode, unsigned long mmr_offset) +static void uv_domain_deactivate(struct irq_domain *domain, + struct irq_data *irq_data) { unsigned long mmr_value; struct uv_IO_APIC_route_entry *entry; - BUILD_BUG_ON(sizeof(struct uv_IO_APIC_route_entry) != - sizeof(unsigned long)); - mmr_value = 0; entry = (struct uv_IO_APIC_route_entry *)&mmr_value; entry->mask = 1; - - uv_write_global_mmr64(mmr_pnode, mmr_offset, mmr_value); + uv_program_mmr(irqd_cfg(irq_data), irq_data->chip_data); } -static int -uv_set_irq_affinity(struct irq_data *data, const struct cpumask *mask, - bool force) -{ - struct irq_cfg *cfg = irqd_cfg(data); - unsigned int dest; - unsigned long mmr_value, mmr_offset; - struct uv_IO_APIC_route_entry *entry; - int mmr_pnode; - - if (apic_set_affinity(data, mask, &dest)) - return -1; - - mmr_value = 0; - entry = (struct uv_IO_APIC_route_entry *)&mmr_value; - - entry->vector = cfg->vector; - entry->delivery_mode = apic->irq_delivery_mode; - entry->dest_mode = apic->irq_dest_mode; - entry->polarity = 0; - entry->trigger = 0; - entry->mask = 0; - entry->dest = dest; - - /* Get previously stored MMR and pnode of hub sourcing interrupts */ - if (uv_irq_2_mmr_info(data->irq, &mmr_offset, &mmr_pnode)) - return -1; - - uv_write_global_mmr64(mmr_pnode, mmr_offset, mmr_value); +static const struct irq_domain_ops uv_domain_ops = { + .alloc = uv_domain_alloc, + .free = uv_domain_free, + .activate = uv_domain_activate, + .deactivate = uv_domain_deactivate, +}; - if (cfg->move_in_progress) - send_cleanup_vector(cfg); +static struct irq_domain *uv_get_irq_domain(void) +{ + static struct irq_domain *uv_domain; + static DEFINE_MUTEX(uv_lock); + + mutex_lock(&uv_lock); + if (uv_domain == NULL) { + uv_domain = irq_domain_add_tree(NULL, &uv_domain_ops, NULL); + if (uv_domain) + uv_domain->parent = x86_vector_domain; + } + mutex_unlock(&uv_lock); - return IRQ_SET_MASK_OK_NOCOPY; + return uv_domain; } /* @@ -238,19 +180,21 @@ uv_set_irq_affinity(struct irq_data *data, const struct cpumask *mask, int uv_setup_irq(char *irq_name, int cpu, int mmr_blade, unsigned long mmr_offset, int limit) { - int ret, irq = irq_alloc_hwirq(uv_blade_to_memory_nid(mmr_blade)); + struct irq_alloc_info info; + struct irq_domain *domain = uv_get_irq_domain(); - if (!irq) - return -EBUSY; + if (!domain) + return -ENOMEM; - ret = arch_enable_uv_irq(irq_name, irq, cpu, mmr_blade, mmr_offset, - limit); - if (ret == irq) - uv_set_irq_2_mmr_info(irq, mmr_offset, mmr_blade); - else - irq_free_hwirq(irq); + init_irq_alloc_info(&info, cpumask_of(cpu)); + info.type = X86_IRQ_ALLOC_TYPE_UV; + info.uv_limit = limit; + info.uv_blade = mmr_blade; + info.uv_offset = mmr_offset; + info.uv_name = irq_name; - return ret; + return irq_domain_alloc_irqs(domain, 1, + uv_blade_to_memory_nid(mmr_blade), &info); } EXPORT_SYMBOL_GPL(uv_setup_irq); @@ -263,26 +207,6 @@ EXPORT_SYMBOL_GPL(uv_setup_irq); */ void uv_teardown_irq(unsigned int irq) { - struct uv_irq_2_mmr_pnode *e; - struct rb_node *n; - unsigned long irqflags; - - spin_lock_irqsave(&uv_irq_lock, irqflags); - n = uv_irq_root.rb_node; - while (n) { - e = rb_entry(n, struct uv_irq_2_mmr_pnode, list); - if (e->irq == irq) { - arch_disable_uv_irq(e->pnode, e->offset); - rb_erase(n, &uv_irq_root); - kfree(e); - break; - } - if (irq < e->irq) - n = n->rb_left; - else - n = n->rb_right; - } - spin_unlock_irqrestore(&uv_irq_lock, irqflags); - irq_free_hwirq(irq); + irq_domain_free_irqs(irq, 1); } EXPORT_SYMBOL_GPL(uv_teardown_irq); diff --git a/arch/x86/power/hibernate_asm_64.S b/arch/x86/power/hibernate_asm_64.S index 3c4469a..e2386cb 100644 --- a/arch/x86/power/hibernate_asm_64.S +++ b/arch/x86/power/hibernate_asm_64.S @@ -78,9 +78,9 @@ ENTRY(restore_image) /* code below has been relocated to a safe page */ ENTRY(core_restore_code) -loop: +.Lloop: testq %rdx, %rdx - jz done + jz .Ldone /* get addresses from the pbe and copy the page */ movq pbe_address(%rdx), %rsi @@ -91,8 +91,8 @@ loop: /* progress to the next pbe */ movq pbe_next(%rdx), %rdx - jmp loop -done: + jmp .Lloop +.Ldone: /* jump to the restore_registers address from the image header */ jmpq *%rax /* diff --git a/arch/x86/um/Makefile b/arch/x86/um/Makefile index acb384d..a8fecc2 100644 --- a/arch/x86/um/Makefile +++ b/arch/x86/um/Makefile @@ -26,7 +26,7 @@ else obj-y += syscalls_64.o vdso/ -subarch-y = ../lib/csum-partial_64.o ../lib/memcpy_64.o ../lib/thunk_64.o \ +subarch-y = ../lib/csum-partial_64.o ../lib/memcpy_64.o ../entry/thunk_64.o \ ../lib/rwsem.o endif diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c index 98088bf..0b95c9b 100644 --- a/arch/x86/xen/enlighten.c +++ b/arch/x86/xen/enlighten.c @@ -1181,10 +1181,11 @@ static const struct pv_cpu_ops xen_cpu_ops __initconst = { .read_tscp = native_read_tscp, .iret = xen_iret, - .irq_enable_sysexit = xen_sysexit, #ifdef CONFIG_X86_64 .usergs_sysret32 = xen_sysret32, .usergs_sysret64 = xen_sysret64, +#else + .irq_enable_sysexit = xen_sysexit, #endif .load_tr_desc = paravirt_nop, @@ -1467,6 +1468,7 @@ asmlinkage __visible void __init xen_start_kernel(void) { struct physdev_set_iopl set_iopl; unsigned long initrd_start = 0; + u64 pat; int rc; if (!xen_start_info) @@ -1574,8 +1576,8 @@ asmlinkage __visible void __init xen_start_kernel(void) * Modify the cache mode translation tables to match Xen's PAT * configuration. */ - - pat_init_cache_modes(); + rdmsrl(MSR_IA32_CR_PAT, pat); + pat_init_cache_modes(pat); /* keep using Xen gdt for now; no urgent need to change it */ diff --git a/arch/x86/xen/p2m.c b/arch/x86/xen/p2m.c index b47124d..8b7f18e 100644 --- a/arch/x86/xen/p2m.c +++ b/arch/x86/xen/p2m.c @@ -67,6 +67,7 @@ #include <linux/seq_file.h> #include <linux/bootmem.h> #include <linux/slab.h> +#include <linux/vmalloc.h> #include <asm/cache.h> #include <asm/setup.h> diff --git a/arch/x86/xen/xen-asm_64.S b/arch/x86/xen/xen-asm_64.S index 985fc3e..f22667a 100644 --- a/arch/x86/xen/xen-asm_64.S +++ b/arch/x86/xen/xen-asm_64.S @@ -15,6 +15,8 @@ #include <asm/percpu.h> #include <asm/processor-flags.h> #include <asm/segment.h> +#include <asm/asm-offsets.h> +#include <asm/thread_info.h> #include <xen/interface/xen.h> @@ -47,29 +49,13 @@ ENTRY(xen_iret) ENDPATCH(xen_iret) RELOC(xen_iret, 1b+1) -/* - * sysexit is not used for 64-bit processes, so it's only ever used to - * return to 32-bit compat userspace. - */ -ENTRY(xen_sysexit) - pushq $__USER32_DS - pushq %rcx - pushq $X86_EFLAGS_IF - pushq $__USER32_CS - pushq %rdx - - pushq $0 -1: jmp hypercall_iret -ENDPATCH(xen_sysexit) -RELOC(xen_sysexit, 1b+1) - ENTRY(xen_sysret64) /* * We're already on the usermode stack at this point, but * still with the kernel gs, so we can easily switch back */ movq %rsp, PER_CPU_VAR(rsp_scratch) - movq PER_CPU_VAR(kernel_stack), %rsp + movq PER_CPU_VAR(cpu_current_top_of_stack), %rsp pushq $__USER_DS pushq PER_CPU_VAR(rsp_scratch) @@ -88,7 +74,7 @@ ENTRY(xen_sysret32) * still with the kernel gs, so we can easily switch back */ movq %rsp, PER_CPU_VAR(rsp_scratch) - movq PER_CPU_VAR(kernel_stack), %rsp + movq PER_CPU_VAR(cpu_current_top_of_stack), %rsp pushq $__USER32_DS pushq PER_CPU_VAR(rsp_scratch) @@ -128,7 +114,7 @@ RELOC(xen_sysret32, 1b+1) /* Normal 64-bit system call target */ ENTRY(xen_syscall_target) undo_xen_syscall - jmp system_call_after_swapgs + jmp entry_SYSCALL_64_after_swapgs ENDPROC(xen_syscall_target) #ifdef CONFIG_IA32_EMULATION @@ -136,13 +122,13 @@ ENDPROC(xen_syscall_target) /* 32-bit compat syscall target */ ENTRY(xen_syscall32_target) undo_xen_syscall - jmp ia32_cstar_target + jmp entry_SYSCALL_compat ENDPROC(xen_syscall32_target) /* 32-bit compat sysenter target */ ENTRY(xen_sysenter_target) undo_xen_syscall - jmp ia32_sysenter_target + jmp entry_SYSENTER_compat ENDPROC(xen_sysenter_target) #else /* !CONFIG_IA32_EMULATION */ diff --git a/arch/x86/xen/xen-ops.h b/arch/x86/xen/xen-ops.h index 9e195c6..c20fe29 100644 --- a/arch/x86/xen/xen-ops.h +++ b/arch/x86/xen/xen-ops.h @@ -134,7 +134,9 @@ DECL_ASM(void, xen_restore_fl_direct, unsigned long); /* These are not functions, and cannot be called normally */ __visible void xen_iret(void); +#ifdef CONFIG_X86_32 __visible void xen_sysexit(void); +#endif __visible void xen_sysret32(void); __visible void xen_sysret64(void); __visible void xen_adjust_exception_frame(void); diff --git a/arch/xtensa/include/asm/io.h b/arch/xtensa/include/asm/io.h index fe1600a..c39bb6e 100644 --- a/arch/xtensa/include/asm/io.h +++ b/arch/xtensa/include/asm/io.h @@ -59,6 +59,7 @@ static inline void __iomem *ioremap_cache(unsigned long offset, } #define ioremap_wc ioremap_nocache +#define ioremap_wt ioremap_nocache static inline void __iomem *ioremap(unsigned long offset, unsigned long size) { |
