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* arm64: move FP-SIMD save/restore code to a macroMarc Zyngier2012-12-051-40/+3
| | | | | | | | In order to be able to reuse the save-restore code in KVM, move it to a pair of macros, similar to what the 32bit code does. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* arm64: hyp: initialize vttbr_el2 to zeroMarc Zyngier2012-12-051-0/+3
| | | | | | | | The architecture doesn't mandate any reset value for vttbr_el2. Better set it to a known value before some HYP code gets confused. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* arm64: add hypervisor stubMarc Zyngier2012-12-053-1/+115
| | | | | | | | | | | | If booted in EL2, install an dummy hypervisor whose only purpose is to be replaced by a full fledged one. A minimal API allows to: - obtain the current HYP vectors (__hyp_get_vectors) - set new HYP vectors (__hyp_set_vectors) Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* arm64: record boot mode when entering the kernelMarc Zyngier2012-12-051-3/+22
| | | | | | | | | | | To be able to signal the availability of EL2 to other parts of the kernel, record the boot mode. Once booted, two predicates indicate if HYP mode is available, and if not, whether this is due to a boot mode mismatch or not. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* arm64: move vector entry macro to assembler.hMarc Zyngier2012-12-051-4/+0
| | | | | | | | | | This macro is also useful to other bits defining vectors (hypervisor stub, KVM...). Move it to a common location. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* arm64: generic timer: use virtual counter instead of physical at EL0Will Deacon2012-12-052-2/+3
| | | | | | | | | | | | | | We want to use the virtual counter at EL0, as the physical counter may not track the current clocksource for guests running under a hypervisor. This patch updates the vdso and generic timer driver to use the virtual counter. The kernel EL2 entry code is also updated to ensure that the virtual offset is initialised to zero. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* arm64: vdso: defer shifting of nanosecond component of timespecWill Deacon2012-12-052-3/+7
| | | | | | | | | | | | | Shifting the nanosecond component of the computed timespec early can lead to sub-ns inaccuracies when using the truncated value as input to further arithmetic for things like conversions to monotonic time. This patch defers the timespec shifting until after the final value has been computed. Reported-by: John Stultz <john.stultz@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* arm64: vdso: rework __do_get_tspec register allocation and return shiftWill Deacon2012-12-051-44/+44
| | | | | | | | | In preparation for sub-ns precision in the vdso timespec maths, change the __do_get_tspec register allocation so that we return the clocksource shift value instead of the unused xtime tspec. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* arm64: vdso: check sequence counter even for coarse realtime operationsWill Deacon2012-12-051-3/+3
| | | | | | | | | | | | | | | | When returning coarse realtime values from clock_gettime, we must still check the sequence counter to ensure that the kernel does not update the vdso datapage whilst we are loading the coarse timespec as this could potentially result in time appearing to go backwards. This patch delays the coarse realtime check until after we have loaded successfully from the vdso datapage. This does mean that we always load the wtm timespec, but conditionalising the load and adding an extra sequence test is unlikely to buy us anything other than messy code, particularly as the sequence test implies a read barrier. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* arm64: vdso: fix clocksource mask when extracting bottom 56 bitsWill Deacon2012-12-051-1/+1
| | | | | | | | | | | | | The generic timer clocksource has 56 bits of precision and as such must be masked appropriately after we have read it. The current mask generated by a movn instruction is off by 4 bits, so we accidentally include the top 4 bits in the final value. This patch fixes the broken mask. Acked-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* arm64: signal: let the compiler inline compat_get_sigframeWill Deacon2012-11-231-3/+3
| | | | | | | | There's no reason to mark compat_get_sigframe inline explicitly, so remove the annotation and let the compiler decide what's best. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* arm64: signal: return struct rt_sigframe from get_sigframeWill Deacon2012-11-231-6/+6
| | | | | | | | | We only have one type of frame (rt_sigframe) for arm64, so just return that type directly and dispense with the framesize argument, which is presumably a hangover from code copied from arch/arm/. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* arm64: signal: align return types for compat and native setup_returnWill Deacon2012-11-231-9/+5
| | | | | | | | setup_return is a void function, so make compat_setup_return look the same rather then unconditionally return 0. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* arm64: signal: push the unwinding prologue on the signal stackWill Deacon2012-11-231-21/+16
| | | | | | | | | | | | | | | | | | | | | | | To allow debuggers to unwind through signal frames, we create a fake stack unwinding prologue containing the link register and frame pointer of the interrupted context. The signal frame is then offset by 16 bytes to make room for the two saved registers which are pushed onto the frame of the *interrupted* context, rather than placed directly above the signal stack. This doesn't work when an alternative signal stack is set up for a SEGV handler, which is raised in response to RLIMIT_STACK being reached. In this case, we try to push the unwinding prologue onto the full stack and subsequently take a fault which we fail to resolve, causing setup_return to return -EFAULT and handle_signal to force_sigsegv on the current task. This patch fixes the problem by including the unwinding prologue as part of the rt_sigframe definition, which is populated during setup_sigframe, ensuring that it always ends up on the signal stack. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Cc: <stable@vger.kernel.org>
* Merge remote-tracking branch 'viro/arch-arm64' into execveCatalin Marinas2012-11-195-44/+16
|\ | | | | | | | | * viro/arch-arm64: arm64: get rid of fork/vfork/clone wrappers
| * Merge commit '6ba1bc826d160fe4f32bcb188687dcca4bdfaf3d' into arch-arm64Al Viro2012-11-166-59/+75
| |\ | | | | | | | | | | | | | | | | | | | | | Backmerge from mainline commit that introduced a trivial conflict in arch/arm64/kernel/process.c - a bunch of functions removed next to the place where kernel_thread() used to be. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * | arm64: get rid of fork/vfork/clone wrappersAl Viro2012-10-225-44/+16
| | | | | | | | | | | | | | | | | | | | | | | | [fixes from Catalin Marinas folded] Acked-by: Catalin Marinas <catalin.marinas@arm.com> Tested-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | | Merge tag 'v3.7-rc5' into execveCatalin Marinas2012-11-136-61/+76
|\ \ \ | |/ / |/| | | | | | | | | | | | | | Linux 3.7-rc5 Conflicts: arch/arm64/kernel/process.c
| * | arm64: smp: add missing completion for secondary bootWill Deacon2012-11-081-2/+1
| |/ | | | | | | | | | | | | | | | | | | | | Commit 149c24151e85 ("ARM: SMP: use a timing out completion for cpu hotplug") modified arm's CPU up path to use completions. It seems that we only got half of this patch for arm64, so add the missing call to complete. Reported-by: Jon Brawn <jon.brawn@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
| * arm64: elf: fix core dumping definitions for GP and FP registersWill Deacon2012-11-081-18/+0
| | | | | | | | | | | | | | | | | | | | struct user_fp does not exist for arm64, so use struct user_fpsimd_state instead for the ELF core dumping definitions. Furthermore, since we use regset-based core dumping, we do not need definitions for dump_task_regs and dump_fpu. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
| * arm64: perf: use architected event for CPU cycle counterWill Deacon2012-11-081-8/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We currently use a fake event encoding (0xFF) to indicate CPU cycles so that we don't waste an event counter and can target the hardware cycle counter instead. The problem with this approach is that the event space defined by the architecture permits an implementation to allocate 0xFF for some other event. This patch uses the architected cycle counter encoding (0x11) so that we avoid potentially clashing with event encodings on future CPU implementations. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
| * arm64: ptrace: use HW_BREAKPOINT_EMPTY type for disabled breakpointsWill Deacon2012-10-181-16/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | If a debugger tries to zero a hardware debug control register, the kernel will try to infer both the type and length of the breakpoint in order to sanity-check against the requested regset type. This will fail because the encoding will appear as a zero-length breakpoint. This patch changes the control register setting so that disabled breakpoints are treated as HW_BREAKPOINT_EMPTY and no further sanity-checking is required. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
| * arm64: ptrace: make structure padding explicit for debug registersWill Deacon2012-10-181-6/+30
| | | | | | | | | | | | | | | | | | | | | | | | The user_hwdebug_state structure contains implicit padding to conform to the alignment requirements of the AArch64 ABI (namely that aggregates must be aligned to their most aligned member). This patch fixes the ptrace functions operating on struct user_hwdebug_state so that the padding is handled correctly. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
| * arm64: Ignore memory blocks below PHYS_OFFSETCatalin Marinas2012-10-181-0/+12
| | | | | | | | | | | | | | | | | | | | According to Documentation/arm64/booting.txt, the kernel image must be loaded at a pre-defined offset from the start of RAM so that the kernel can calculate PHYS_OFFSET based on this address. If the DT contains memory blocks below this PHYS_OFFSET, report them and ignore the corresponding memory range. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
| * arm64: Fix the update_vsyscall() prototypeCatalin Marinas2012-10-181-10/+10
| | | | | | | | | | | | | | | | | | | | With commit 576094b7 (time: Introduce new GENERIC_TIME_VSYSCALL) the old update_vsyscall() prototype is no longer available. This patch updates the arm64 port. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Will Deacon <will.deacon@arm.com> Cc: John Stultz <john.stultz@linaro.org>
| * arm64: Remove duplicate inclusion of mmu_context.h in smp.cSachin Kamat2012-10-161-1/+0
| | | | | | | | | | | | | | asm/mmu_context.h was included twice. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* | arm64: Use generic sys_execve() implementationCatalin Marinas2012-10-174-50/+0
| | | | | | | | | | | | | | | | This patch converts the arm64 port to use the generic sys_execve() implementation removing the arm64-specific (compat_)sys_execve_wrapper() functions. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* | arm64: Use generic kernel_execve() implementationCatalin Marinas2012-10-172-44/+1
| | | | | | | | | | | | | | This patch enables CONFIG_GENERIC_KERNEL_EXECVE on arm64 and removes the arm64-specific implementation of kernel_execve(). Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* | arm64: Use generic kernel_thread() implementationCatalin Marinas2012-10-172-54/+28
|/ | | | | | | | | This patch enables CONFIG_GENERIC_KERNEL_THREAD on arm64, changes copy_threads to cope with kernel threads creation and adapts ret_from_fork accordingly. The arm64-specific kernel_thread implementation is no longer needed. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* Merge tag 'arm64-uapi' of ↵Linus Torvalds2012-10-135-143/+16
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64 Pull arm64 uapi disintegration from Catalin Marinas: "UAPI headers for arm64 together with some clean-up to make it possible: - Do not export the COMPAT_* definitions to user - Simplify the compat unistd32.h definitions and remove the __SYSCALL_COMPAT guard - Disintegrate the arch/arm64/include/asm/* headers" * tag 'arm64-uapi' of git://git.kernel.org/pub/scm/linux/kernel/git/cmarinas/linux-aarch64: UAPI: (Scripted) Disintegrate arch/arm64/include/asm arm64: Do not export the compat-specific definitions to the user arm64: Do not include asm/unistd32.h in asm/unistd.h arm64: Remove unused definitions from asm/unistd32.h
| * arm64: Do not export the compat-specific definitions to the userCatalin Marinas2012-10-111-3/+3
| | | | | | | | | | | | | | | | | | This patch adds #ifdef __KERNEL__ guards around the COMPAT_* definitions to avoid exporting them to user. AArch32 user requiring the kernel headers must use those generated with ARCH=arm. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Will Deacon <will.deacon@arm.com>
| * arm64: Do not include asm/unistd32.h in asm/unistd.hCatalin Marinas2012-10-114-8/+4
| | | | | | | | | | | | | | | | | | This patch only includes asm/unistd32.h where necessary and removes its inclusion in the asm/unistd.h file. The __SYSCALL_COMPAT guard is dropped. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Will Deacon <will.deacon@arm.com>
| * arm64: Remove unused definitions from asm/unistd32.hCatalin Marinas2012-10-112-132/+9
| | | | | | | | | | | | | | | | | | | | | | This patch removes the compat __NR_* definitions from the unistd32.h file and only keeps those that are used by the AArch64 kernel with a new __NR_compat_* prefix. The additional wrapper definitions in arch/arm64/kernel/sys32.S have been removed and the actual wrapper names included in the asm/unistd32.h file. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Will Deacon <will.deacon@arm.com>
* | vfs: define struct filename and have getname() return itJeff Layton2012-10-122-5/+5
|/ | | | | | | | | | | | | | | | | | | | | | getname() is intended to copy pathname strings from userspace into a kernel buffer. The result is just a string in kernel space. It would however be quite helpful to be able to attach some ancillary info to the string. For instance, we could attach some audit-related info to reduce the amount of audit-related processing needed. When auditing is enabled, we could also call getname() on the string more than once and not need to recopy it from userspace. This patchset converts the getname()/putname() interfaces to return a struct instead of a string. For now, the struct just tracks the string in kernel space and the original userland pointer for it. Later, we'll add other information to the struct as it becomes convenient. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* arm64: Enable interrupts before calling do_notify_resume()Catalin Marinas2012-10-081-0/+1
| | | | | | | | | | task_work_run() implementation had the side effect of enabling interrupts. With commit ac3d0da8 (task_work: Make task_work_add() lockless), interrupts are no longer enabled revealing the bug in the arch code. This patch enables the interrupt explicitly before calling do_notify_resume(). Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* arm64: Use the generic compat_sys_sendfile() implementationCatalin Marinas2012-10-081-20/+0
| | | | | | | | The generic implementation of compat_sys_sendfile() has been introduced by commit 8f9c0119. This patch removes the arm64 implementation in favour of the generic one. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* compat: move compat_siginfo_t definition to asm/compat.hDenys Vlasenko2012-10-061-53/+0
| | | | | | | | | | | | | | | | | | | | | | | | | This is a preparatory patch for the introduction of NT_SIGINFO elf note. Make the location of compat_siginfo_t uniform across eight architectures which have it. Now it can be pulled in by including asm/compat.h or linux/compat.h. Most of the copies are verbatim. compat_uid[32]_t had to be replaced by __compat_uid[32]_t. compat_uptr_t had to be moved up before compat_siginfo_t in asm/compat.h on a several architectures (tile already had it moved up). compat_sigval_t had to be relocated from linux/compat.h to asm/compat.h. Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Amerigo Wang <amwang@redhat.com> Cc: "Jonathan M. Foote" <jmfoote@cert.org> Cc: Roland McGrath <roland@hack.frob.com> Cc: Pedro Alves <palves@redhat.com> Cc: Fengguang Wu <fengguang.wu@intel.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* arm64: ptrace: remove obsolete ptrace request numbers from user headersWill Deacon2012-09-271-6/+6
| | | | | | | | The use of regsets has removed the need for many private ptrace requests, so remove the corresponding definitions from the user-visible ptrace.h Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* arm64: Build infrastructureCatalin Marinas2012-09-173-0/+154
| | | | | | | | | | | | | This patch adds Makefile and Kconfig files required for building an AArch64 kernel. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Nicolas Pitre <nico@linaro.org> Acked-by: Olof Johansson <olof@lixom.net> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
* arm64: Generic timers supportMarc Zyngier2012-09-171-0/+65
| | | | | | | | | | | | | | | | | | | This patch adds support for the ARM generic timers with A64 instructions for accessing the timer registers. It uses the physical counter as the clock source and the virtual counter as sched_clock. The timer frequency can be specified via DT or read from the CNTFRQ_EL0 register. The physical counter is also accessible from user space allowing fast gettimeofday() implementation. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Nicolas Pitre <nico@linaro.org> Acked-by: Olof Johansson <olof@lixom.net> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
* arm64: Loadable modulesWill Deacon2012-09-171-0/+456
| | | | | | | | | | | | | | This patch adds support for loadable modules. Loadable modules are loaded 64MB below the kernel image due to branch relocation restrictions (see Documentation/arm64/memory.txt). Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Nicolas Pitre <nico@linaro.org> Acked-by: Olof Johansson <olof@lixom.net> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
* arm64: Miscellaneous library functionsMarc Zyngier2012-09-171-0/+46
| | | | | | | | | | | | | This patch adds udelay, memory and bit operations together with the ksyms exports. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Nicolas Pitre <nico@linaro.org> Acked-by: Olof Johansson <olof@lixom.net> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
* arm64: Performance counters supportWill Deacon2012-09-171-0/+1368
| | | | | | | | | | | This patch adds support for the AArch64 performance counters. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Nicolas Pitre <nico@linaro.org> Acked-by: Olof Johansson <olof@lixom.net> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
* arm64: Debugging supportWill Deacon2012-09-173-0/+2294
| | | | | | | | | | | | This patch adds ptrace, debug monitors and hardware breakpoints support. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Nicolas Pitre <nico@linaro.org> Acked-by: Olof Johansson <olof@lixom.net> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
* arm64: Floating point and SIMDCatalin Marinas2012-09-172-0/+186
| | | | | | | | | | | | | | | | This patch adds support for FP/ASIMD register bank saving and restoring during context switch and FP exception handling to generate SIGFPE. There are 32 128-bit registers and the context switching is currently done non-lazily. Benchmarks on real hardware are required before implementing lazy FP state saving/restoring. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Nicolas Pitre <nico@linaro.org> Acked-by: Olof Johansson <olof@lixom.net> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
* arm64: 32-bit (compat) applications supportWill Deacon2012-09-174-0/+1399
| | | | | | | | | | | | | | | | | | | This patch adds support for 32-bit applications. The vectors page is a binary blob mapped into the application user space at 0xffff0000 (the AArch64 toolchain does not support compilation of AArch32 code). Full compatibility with ARMv7 user space is supported. The use of deprecated ARMv7 functionality (SWP, CP15 barriers) has been disabled by default on AArch64 kernels and unaligned LDM/STM is not supported. Please note that only the ARM 32-bit EABI is supported, so no OABI compatibility. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Nicolas Pitre <nico@linaro.org> Acked-by: Olof Johansson <olof@lixom.net> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
* arm64: Signal handling supportCatalin Marinas2012-09-171-0/+437
| | | | | | | | | | | | | | This patch adds support for signal handling. The sigreturn is done via VDSO, introduced by a previous patch. The SA_RESTORER is still defined as it is required for 32-bit (compat) support but it is not to be used for 64-bit applications. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Nicolas Pitre <nico@linaro.org> Acked-by: Olof Johansson <olof@lixom.net> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
* arm64: VDSO supportWill Deacon2012-09-179-0/+781
| | | | | | | | | | | | | | This patch adds VDSO support for 64-bit applications. The VDSO code is currently used for sys_rt_sigreturn() and optimised gettimeofday() (using the user-accessible generic counter). Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Nicolas Pitre <nico@linaro.org> Acked-by: Olof Johansson <olof@lixom.net> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
* arm64: System calls handlingCatalin Marinas2012-09-171-0/+138
| | | | | | | | | | | | | | | | | | | This patch adds support for system calls coming from 64-bit applications. It uses the asm-generic/unistd.h definitions with the canonical set of system calls. The private system calls are only used for 32-bit (compat) applications as 64-bit ones can set the TLS and flush the caches entirely from user space. The sys_call_table is just an array defined in a C file and it contains pointers to the syscall functions. The array is 4KB aligned to allow the use of the ADRP instruction (longer range ADR) in entry.S. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Nicolas Pitre <nico@linaro.org> Acked-by: Olof Johansson <olof@lixom.net> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
* arm64: SMP supportCatalin Marinas2012-09-171-0/+469
| | | | | | | | | | | | | | | | | | | | | | | This patch adds SMP initialisation and spinlocks implementation for AArch64. The spinlock support uses the new load-acquire/store-release instructions to avoid explicit barriers. The architecture also specifies that an event is automatically generated when clearing the exclusive monitor state to wake up processors in WFE, so there is no need for an explicit DSB/SEV instruction sequence. The SEVL instruction is used to set the exclusive monitor locally as there is no conditional WFE and a branch is more expensive. For the SMP booting protocol, see Documentation/arm64/booting.txt. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Nicolas Pitre <nico@linaro.org> Acked-by: Olof Johansson <olof@lixom.net> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
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