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authorDavid S. Miller <davem@davemloft.net>2012-04-12 19:41:23 -0400
committerDavid S. Miller <davem@davemloft.net>2012-04-12 19:41:23 -0400
commit011e3c63251be832d23df9f0697626ab7b354d02 (patch)
tree2cad5b58c274c93ae49d9b58fb15d784d4dfd78f /arch
parentc1412fce7eccae62b4de22494f6ab3ff8a90c0c6 (diff)
parentecca5c3acc0d0933d89abc44e60afb0cc8170e35 (diff)
downloadop-kernel-dev-011e3c63251be832d23df9f0697626ab7b354d02.zip
op-kernel-dev-011e3c63251be832d23df9f0697626ab7b354d02.tar.gz
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Diffstat (limited to 'arch')
-rw-r--r--arch/c6x/include/asm/irq.h4
-rw-r--r--arch/c6x/kernel/irq.c13
-rw-r--r--arch/powerpc/include/asm/irq.h2
-rw-r--r--arch/powerpc/kernel/entry_32.S39
-rw-r--r--arch/powerpc/kernel/irq.c6
-rw-r--r--arch/powerpc/kernel/process.c4
-rw-r--r--arch/powerpc/kvm/book3s_hv_builtin.c9
-rw-r--r--arch/powerpc/kvm/book3s_hv_interrupts.S8
-rw-r--r--arch/powerpc/kvm/book3s_interrupts.S7
-rw-r--r--arch/powerpc/kvm/book3s_pr.c9
-rw-r--r--arch/powerpc/kvm/booke_interrupts.S7
-rw-r--r--arch/powerpc/platforms/cell/axon_msi.c2
-rw-r--r--arch/powerpc/platforms/cell/beat_interrupt.c2
-rw-r--r--arch/powerpc/platforms/powermac/smp.c2
-rw-r--r--arch/powerpc/platforms/ps3/interrupt.c3
-rw-r--r--arch/sh/Kconfig.debug1
-rw-r--r--arch/sh/boards/board-sh7785lcr.c1
-rw-r--r--arch/sh/boards/mach-hp6xx/pm.c1
-rw-r--r--arch/sh/drivers/dma/dma-sysfs.c2
-rw-r--r--arch/sh/kernel/cpu/fpu.c1
-rw-r--r--arch/sh/kernel/cpu/sh2a/fpu.c1
-rw-r--r--arch/sh/kernel/cpu/sh4/fpu.c1
-rw-r--r--arch/sh/kernel/cpu/sh4a/clock-sh7757.c2
-rw-r--r--arch/sh/kernel/cpu/shmobile/pm.c1
-rw-r--r--arch/sh/kernel/idle.c2
-rw-r--r--arch/sh/kernel/kgdb.c1
-rw-r--r--arch/sh/kernel/process_32.c1
-rw-r--r--arch/sh/kernel/smp.c1
-rw-r--r--arch/sh/kernel/vsyscall/vsyscall-sigreturn.S35
-rw-r--r--arch/sh/kernel/vsyscall/vsyscall-trapa.S23
-rw-r--r--arch/sh/mm/cache-sh4.c1
-rw-r--r--arch/sh/mm/flush-sh4.c1
-rw-r--r--arch/sh/mm/sram.c1
-rw-r--r--arch/sparc/kernel/leon_pci.c13
-rw-r--r--arch/sparc/mm/fault_32.c37
-rw-r--r--arch/sparc/mm/fault_64.c37
-rw-r--r--arch/tile/Kconfig8
-rw-r--r--arch/tile/Makefile5
-rw-r--r--arch/tile/include/arch/spr_def.h4
-rw-r--r--arch/tile/include/asm/atomic.h50
-rw-r--r--arch/tile/include/asm/atomic_32.h2
-rw-r--r--arch/tile/include/asm/bitops_64.h8
-rw-r--r--arch/tile/include/asm/cmpxchg.h73
-rw-r--r--arch/tile/include/asm/irq.h2
-rw-r--r--arch/tile/include/asm/spinlock_64.h2
-rw-r--r--arch/tile/include/asm/stack.h1
-rw-r--r--arch/tile/include/asm/traps.h6
-rw-r--r--arch/tile/kernel/entry.S2
-rw-r--r--arch/tile/kernel/intvec_32.S24
-rw-r--r--arch/tile/kernel/intvec_64.S52
-rw-r--r--arch/tile/kernel/module.c2
-rw-r--r--arch/tile/kernel/proc.c4
-rw-r--r--arch/tile/kernel/process.c3
-rw-r--r--arch/tile/kernel/setup.c28
-rw-r--r--arch/tile/kernel/single_step.c31
-rw-r--r--arch/tile/kernel/smp.c8
-rw-r--r--arch/tile/kernel/smpboot.c2
-rw-r--r--arch/tile/kernel/stack.c232
-rw-r--r--arch/tile/kernel/traps.c15
-rw-r--r--arch/tile/lib/Makefile1
-rw-r--r--arch/tile/lib/cacheflush.c30
-rw-r--r--arch/tile/lib/memcpy_user_64.c8
-rw-r--r--arch/tile/lib/spinlock_common.h2
-rw-r--r--arch/tile/mm/fault.c22
-rw-r--r--arch/tile/mm/homecache.c1
-rw-r--r--arch/tile/mm/init.c26
-rw-r--r--arch/tile/mm/pgtable.c38
-rw-r--r--arch/um/drivers/cow.h35
-rw-r--r--arch/um/drivers/cow_user.c43
-rw-r--r--arch/um/drivers/mconsole_kern.c1
-rw-r--r--arch/um/include/asm/Kbuild3
-rw-r--r--arch/um/kernel/Makefile7
-rw-r--r--arch/um/kernel/process.c6
-rw-r--r--arch/um/kernel/skas/mmu.c1
-rw-r--r--arch/x86/Makefile.um3
-rw-r--r--arch/x86/include/asm/uaccess.h2
-rw-r--r--arch/x86/include/asm/uaccess_32.h5
-rw-r--r--arch/x86/include/asm/uaccess_64.h4
-rw-r--r--arch/x86/kernel/kvm.c4
-rw-r--r--arch/x86/kvm/pmu.c2
-rw-r--r--arch/x86/kvm/vmx.c2
-rw-r--r--arch/x86/lib/usercopy.c103
-rw-r--r--arch/x86/lib/usercopy_32.c87
-rw-r--r--arch/x86/lib/usercopy_64.c49
-rw-r--r--arch/x86/um/asm/barrier.h75
-rw-r--r--arch/x86/um/asm/system.h135
-rw-r--r--arch/x86/xen/mmu.c4
-rw-r--r--arch/x86/xen/smp.c2
88 files changed, 832 insertions, 714 deletions
diff --git a/arch/c6x/include/asm/irq.h b/arch/c6x/include/asm/irq.h
index f13b78d..ab4577f 100644
--- a/arch/c6x/include/asm/irq.h
+++ b/arch/c6x/include/asm/irq.h
@@ -42,10 +42,6 @@
/* This number is used when no interrupt has been assigned */
#define NO_IRQ 0
-struct irq_data;
-extern irq_hw_number_t irqd_to_hwirq(struct irq_data *d);
-extern irq_hw_number_t virq_to_hw(unsigned int virq);
-
extern void __init init_pic_c64xplus(void);
extern void init_IRQ(void);
diff --git a/arch/c6x/kernel/irq.c b/arch/c6x/kernel/irq.c
index 65b8ddf..c90fb5e 100644
--- a/arch/c6x/kernel/irq.c
+++ b/arch/c6x/kernel/irq.c
@@ -130,16 +130,3 @@ int arch_show_interrupts(struct seq_file *p, int prec)
seq_printf(p, "%*s: %10lu\n", prec, "Err", irq_err_count);
return 0;
}
-
-irq_hw_number_t irqd_to_hwirq(struct irq_data *d)
-{
- return d->hwirq;
-}
-EXPORT_SYMBOL_GPL(irqd_to_hwirq);
-
-irq_hw_number_t virq_to_hw(unsigned int virq)
-{
- struct irq_data *irq_data = irq_get_irq_data(virq);
- return WARN_ON(!irq_data) ? 0 : irq_data->hwirq;
-}
-EXPORT_SYMBOL_GPL(virq_to_hw);
diff --git a/arch/powerpc/include/asm/irq.h b/arch/powerpc/include/asm/irq.h
index cf417e51..e648af9 100644
--- a/arch/powerpc/include/asm/irq.h
+++ b/arch/powerpc/include/asm/irq.h
@@ -33,8 +33,6 @@ extern atomic_t ppc_n_lost_interrupts;
/* Same thing, used by the generic IRQ code */
#define NR_IRQS_LEGACY NUM_ISA_INTERRUPTS
-struct irq_data;
-extern irq_hw_number_t irqd_to_hwirq(struct irq_data *d);
extern irq_hw_number_t virq_to_hw(unsigned int virq);
/**
diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S
index 3e57a00..ba3aeb4 100644
--- a/arch/powerpc/kernel/entry_32.S
+++ b/arch/powerpc/kernel/entry_32.S
@@ -206,40 +206,43 @@ reenable_mmu: /* re-enable mmu so we can */
andi. r10,r10,MSR_EE /* Did EE change? */
beq 1f
- /* Save handler and return address into the 2 unused words
- * of the STACK_FRAME_OVERHEAD (sneak sneak sneak). Everything
- * else can be recovered from the pt_regs except r3 which for
- * normal interrupts has been set to pt_regs and for syscalls
- * is an argument, so we temporarily use ORIG_GPR3 to save it
- */
- stw r9,8(r1)
- stw r11,12(r1)
- stw r3,ORIG_GPR3(r1)
/*
* The trace_hardirqs_off will use CALLER_ADDR0 and CALLER_ADDR1.
* If from user mode there is only one stack frame on the stack, and
* accessing CALLER_ADDR1 will cause oops. So we need create a dummy
* stack frame to make trace_hardirqs_off happy.
+ *
+ * This is handy because we also need to save a bunch of GPRs,
+ * r3 can be different from GPR3(r1) at this point, r9 and r11
+ * contains the old MSR and handler address respectively,
+ * r4 & r5 can contain page fault arguments that need to be passed
+ * along as well. r12, CCR, CTR, XER etc... are left clobbered as
+ * they aren't useful past this point (aren't syscall arguments),
+ * the rest is restored from the exception frame.
*/
+ stwu r1,-32(r1)
+ stw r9,8(r1)
+ stw r11,12(r1)
+ stw r3,16(r1)
+ stw r4,20(r1)
+ stw r5,24(r1)
andi. r12,r12,MSR_PR
- beq 11f
- stwu r1,-16(r1)
+ b 11f
bl trace_hardirqs_off
- addi r1,r1,16
b 12f
-
11:
bl trace_hardirqs_off
12:
+ lwz r5,24(r1)
+ lwz r4,20(r1)
+ lwz r3,16(r1)
+ lwz r11,12(r1)
+ lwz r9,8(r1)
+ addi r1,r1,32
lwz r0,GPR0(r1)
- lwz r3,ORIG_GPR3(r1)
- lwz r4,GPR4(r1)
- lwz r5,GPR5(r1)
lwz r6,GPR6(r1)
lwz r7,GPR7(r1)
lwz r8,GPR8(r1)
- lwz r9,8(r1)
- lwz r11,12(r1)
1: mtctr r11
mtlr r9
bctr /* jump to handler */
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 243dbab..5ec1b23 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -560,12 +560,6 @@ void do_softirq(void)
local_irq_restore(flags);
}
-irq_hw_number_t irqd_to_hwirq(struct irq_data *d)
-{
- return d->hwirq;
-}
-EXPORT_SYMBOL_GPL(irqd_to_hwirq);
-
irq_hw_number_t virq_to_hw(unsigned int virq)
{
struct irq_data *irq_data = irq_get_irq_data(virq);
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index f88698c..4937c96 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -1235,7 +1235,7 @@ void __ppc64_runlatch_on(void)
ctrl |= CTRL_RUNLATCH;
mtspr(SPRN_CTRLT, ctrl);
- ti->local_flags |= TLF_RUNLATCH;
+ ti->local_flags |= _TLF_RUNLATCH;
}
/* Called with hard IRQs off */
@@ -1244,7 +1244,7 @@ void __ppc64_runlatch_off(void)
struct thread_info *ti = current_thread_info();
unsigned long ctrl;
- ti->local_flags &= ~TLF_RUNLATCH;
+ ti->local_flags &= ~_TLF_RUNLATCH;
ctrl = mfspr(SPRN_CTRLF);
ctrl &= ~CTRL_RUNLATCH;
diff --git a/arch/powerpc/kvm/book3s_hv_builtin.c b/arch/powerpc/kvm/book3s_hv_builtin.c
index bed1279..e1b60f5 100644
--- a/arch/powerpc/kvm/book3s_hv_builtin.c
+++ b/arch/powerpc/kvm/book3s_hv_builtin.c
@@ -173,9 +173,9 @@ static void __init kvm_linear_init_one(ulong size, int count, int type)
static struct kvmppc_linear_info *kvm_alloc_linear(int type)
{
- struct kvmppc_linear_info *ri;
+ struct kvmppc_linear_info *ri, *ret;
- ri = NULL;
+ ret = NULL;
spin_lock(&linear_lock);
list_for_each_entry(ri, &free_linears, list) {
if (ri->type != type)
@@ -183,11 +183,12 @@ static struct kvmppc_linear_info *kvm_alloc_linear(int type)
list_del(&ri->list);
atomic_inc(&ri->use_count);
+ memset(ri->base_virt, 0, ri->npages << PAGE_SHIFT);
+ ret = ri;
break;
}
spin_unlock(&linear_lock);
- memset(ri->base_virt, 0, ri->npages << PAGE_SHIFT);
- return ri;
+ return ret;
}
static void kvm_release_linear(struct kvmppc_linear_info *ri)
diff --git a/arch/powerpc/kvm/book3s_hv_interrupts.S b/arch/powerpc/kvm/book3s_hv_interrupts.S
index 3f7b674..d3fb4df 100644
--- a/arch/powerpc/kvm/book3s_hv_interrupts.S
+++ b/arch/powerpc/kvm/book3s_hv_interrupts.S
@@ -46,8 +46,10 @@ _GLOBAL(__kvmppc_vcore_entry)
/* Save host state to the stack */
stdu r1, -SWITCH_FRAME_SIZE(r1)
- /* Save non-volatile registers (r14 - r31) */
+ /* Save non-volatile registers (r14 - r31) and CR */
SAVE_NVGPRS(r1)
+ mfcr r3
+ std r3, _CCR(r1)
/* Save host DSCR */
BEGIN_FTR_SECTION
@@ -157,8 +159,10 @@ kvmppc_handler_highmem:
* R13 = PACA
*/
- /* Restore non-volatile host registers (r14 - r31) */
+ /* Restore non-volatile host registers (r14 - r31) and CR */
REST_NVGPRS(r1)
+ ld r4, _CCR(r1)
+ mtcr r4
addi r1, r1, SWITCH_FRAME_SIZE
ld r0, PPC_LR_STKOFF(r1)
diff --git a/arch/powerpc/kvm/book3s_interrupts.S b/arch/powerpc/kvm/book3s_interrupts.S
index 0a8515a..3e35383 100644
--- a/arch/powerpc/kvm/book3s_interrupts.S
+++ b/arch/powerpc/kvm/book3s_interrupts.S
@@ -84,6 +84,10 @@ kvm_start_entry:
/* Save non-volatile registers (r14 - r31) */
SAVE_NVGPRS(r1)
+ /* Save CR */
+ mfcr r14
+ stw r14, _CCR(r1)
+
/* Save LR */
PPC_STL r0, _LINK(r1)
@@ -165,6 +169,9 @@ kvm_exit_loop:
PPC_LL r4, _LINK(r1)
mtlr r4
+ lwz r14, _CCR(r1)
+ mtcr r14
+
/* Restore non-volatile host registers (r14 - r31) */
REST_NVGPRS(r1)
diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c
index 642d885..7759053 100644
--- a/arch/powerpc/kvm/book3s_pr.c
+++ b/arch/powerpc/kvm/book3s_pr.c
@@ -777,6 +777,7 @@ program_interrupt:
}
}
+ preempt_disable();
if (!(r & RESUME_HOST)) {
/* To avoid clobbering exit_reason, only check for signals if
* we aren't already exiting to userspace for some other
@@ -798,8 +799,6 @@ program_interrupt:
run->exit_reason = KVM_EXIT_INTR;
r = -EINTR;
} else {
- preempt_disable();
-
/* In case an interrupt came in that was triggered
* from userspace (like DEC), we need to check what
* to inject now! */
@@ -881,7 +880,8 @@ int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
switch (reg->id) {
case KVM_REG_PPC_HIOR:
- r = put_user(to_book3s(vcpu)->hior, (u64 __user *)reg->addr);
+ r = copy_to_user((u64 __user *)(long)reg->addr,
+ &to_book3s(vcpu)->hior, sizeof(u64));
break;
default:
break;
@@ -896,7 +896,8 @@ int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
switch (reg->id) {
case KVM_REG_PPC_HIOR:
- r = get_user(to_book3s(vcpu)->hior, (u64 __user *)reg->addr);
+ r = copy_from_user(&to_book3s(vcpu)->hior,
+ (u64 __user *)(long)reg->addr, sizeof(u64));
if (!r)
to_book3s(vcpu)->hior_explicit = true;
break;
diff --git a/arch/powerpc/kvm/booke_interrupts.S b/arch/powerpc/kvm/booke_interrupts.S
index 10d8ef6..c8c4b87 100644
--- a/arch/powerpc/kvm/booke_interrupts.S
+++ b/arch/powerpc/kvm/booke_interrupts.S
@@ -34,7 +34,8 @@
/* r2 is special: it holds 'current', and it made nonvolatile in the
* kernel with the -ffixed-r2 gcc option. */
#define HOST_R2 12
-#define HOST_NV_GPRS 16
+#define HOST_CR 16
+#define HOST_NV_GPRS 20
#define HOST_NV_GPR(n) (HOST_NV_GPRS + ((n - 14) * 4))
#define HOST_MIN_STACK_SIZE (HOST_NV_GPR(31) + 4)
#define HOST_STACK_SIZE (((HOST_MIN_STACK_SIZE + 15) / 16) * 16) /* Align. */
@@ -296,8 +297,10 @@ heavyweight_exit:
/* Return to kvm_vcpu_run(). */
lwz r4, HOST_STACK_LR(r1)
+ lwz r5, HOST_CR(r1)
addi r1, r1, HOST_STACK_SIZE
mtlr r4
+ mtcr r5
/* r3 still contains the return code from kvmppc_handle_exit(). */
blr
@@ -314,6 +317,8 @@ _GLOBAL(__kvmppc_vcpu_run)
stw r3, HOST_RUN(r1)
mflr r3
stw r3, HOST_STACK_LR(r1)
+ mfcr r5
+ stw r5, HOST_CR(r1)
/* Save host non-volatile register state to stack. */
stw r14, HOST_NV_GPR(r14)(r1)
diff --git a/arch/powerpc/platforms/cell/axon_msi.c b/arch/powerpc/platforms/cell/axon_msi.c
index db360fc..d09f3e8 100644
--- a/arch/powerpc/platforms/cell/axon_msi.c
+++ b/arch/powerpc/platforms/cell/axon_msi.c
@@ -392,7 +392,7 @@ static int axon_msi_probe(struct platform_device *device)
}
memset(msic->fifo_virt, 0xff, MSIC_FIFO_SIZE_BYTES);
- msic->irq_domain = irq_domain_add_nomap(dn, &msic_host_ops, msic);
+ msic->irq_domain = irq_domain_add_nomap(dn, 0, &msic_host_ops, msic);
if (!msic->irq_domain) {
printk(KERN_ERR "axon_msi: couldn't allocate irq_domain for %s\n",
dn->full_name);
diff --git a/arch/powerpc/platforms/cell/beat_interrupt.c b/arch/powerpc/platforms/cell/beat_interrupt.c
index e5c3a2c..f9a48af 100644
--- a/arch/powerpc/platforms/cell/beat_interrupt.c
+++ b/arch/powerpc/platforms/cell/beat_interrupt.c
@@ -239,7 +239,7 @@ void __init beatic_init_IRQ(void)
ppc_md.get_irq = beatic_get_irq;
/* Allocate an irq host */
- beatic_host = irq_domain_add_nomap(NULL, &beatic_pic_host_ops, NULL);
+ beatic_host = irq_domain_add_nomap(NULL, 0, &beatic_pic_host_ops, NULL);
BUG_ON(beatic_host == NULL);
irq_set_default_host(beatic_host);
}
diff --git a/arch/powerpc/platforms/powermac/smp.c b/arch/powerpc/platforms/powermac/smp.c
index a81e5a8..b4ddaa3 100644
--- a/arch/powerpc/platforms/powermac/smp.c
+++ b/arch/powerpc/platforms/powermac/smp.c
@@ -192,7 +192,7 @@ static int psurge_secondary_ipi_init(void)
{
int rc = -ENOMEM;
- psurge_host = irq_domain_add_nomap(NULL, &psurge_host_ops, NULL);
+ psurge_host = irq_domain_add_nomap(NULL, 0, &psurge_host_ops, NULL);
if (psurge_host)
psurge_secondary_virq = irq_create_direct_mapping(psurge_host);
diff --git a/arch/powerpc/platforms/ps3/interrupt.c b/arch/powerpc/platforms/ps3/interrupt.c
index 2a4ff86..5f3b232 100644
--- a/arch/powerpc/platforms/ps3/interrupt.c
+++ b/arch/powerpc/platforms/ps3/interrupt.c
@@ -753,9 +753,8 @@ void __init ps3_init_IRQ(void)
unsigned cpu;
struct irq_domain *host;
- host = irq_domain_add_nomap(NULL, &ps3_host_ops, NULL);
+ host = irq_domain_add_nomap(NULL, PS3_PLUG_MAX + 1, &ps3_host_ops, NULL);
irq_set_default_host(host);
- irq_set_virq_count(PS3_PLUG_MAX + 1);
for_each_possible_cpu(cpu) {
struct ps3_private *pd = &per_cpu(ps3_private, cpu);
diff --git a/arch/sh/Kconfig.debug b/arch/sh/Kconfig.debug
index c1d5a82..5f2bb42 100644
--- a/arch/sh/Kconfig.debug
+++ b/arch/sh/Kconfig.debug
@@ -61,6 +61,7 @@ config DUMP_CODE
config DWARF_UNWINDER
bool "Enable the DWARF unwinder for stacktraces"
select FRAME_POINTER
+ depends on SUPERH32
default n
help
Enabling this option will make stacktraces more accurate, at
diff --git a/arch/sh/boards/board-sh7785lcr.c b/arch/sh/boards/board-sh7785lcr.c
index d879848..d0d6221 100644
--- a/arch/sh/boards/board-sh7785lcr.c
+++ b/arch/sh/boards/board-sh7785lcr.c
@@ -28,6 +28,7 @@
#include <cpu/sh7785.h>
#include <asm/heartbeat.h>
#include <asm/clock.h>
+#include <asm/bl_bit.h>
/*
* NOTE: This board has 2 physical memory maps.
diff --git a/arch/sh/boards/mach-hp6xx/pm.c b/arch/sh/boards/mach-hp6xx/pm.c
index adc9b4b..8b50cf7 100644
--- a/arch/sh/boards/mach-hp6xx/pm.c
+++ b/arch/sh/boards/mach-hp6xx/pm.c
@@ -14,6 +14,7 @@
#include <linux/gfp.h>
#include <asm/io.h>
#include <asm/hd64461.h>
+#include <asm/bl_bit.h>
#include <mach/hp6xx.h>
#include <cpu/dac.h>
#include <asm/freq.h>
diff --git a/arch/sh/drivers/dma/dma-sysfs.c b/arch/sh/drivers/dma/dma-sysfs.c
index b1cb271..67ee956 100644
--- a/arch/sh/drivers/dma/dma-sysfs.c
+++ b/arch/sh/drivers/dma/dma-sysfs.c
@@ -54,7 +54,7 @@ static int __init dma_subsys_init(void)
if (unlikely(ret))
return ret;
- return device_create_file(dma_subsys.dev_root, &dev_attr_devices.attr);
+ return device_create_file(dma_subsys.dev_root, &dev_attr_devices);
}
postcore_initcall(dma_subsys_init);
diff --git a/arch/sh/kernel/cpu/fpu.c b/arch/sh/kernel/cpu/fpu.c
index 7f1b70c..f8f7af5 100644
--- a/arch/sh/kernel/cpu/fpu.c
+++ b/arch/sh/kernel/cpu/fpu.c
@@ -2,6 +2,7 @@
#include <linux/slab.h>
#include <asm/processor.h>
#include <asm/fpu.h>
+#include <asm/traps.h>
int init_fpu(struct task_struct *tsk)
{
diff --git a/arch/sh/kernel/cpu/sh2a/fpu.c b/arch/sh/kernel/cpu/sh2a/fpu.c
index 488d24e..98bbaa4 100644
--- a/arch/sh/kernel/cpu/sh2a/fpu.c
+++ b/arch/sh/kernel/cpu/sh2a/fpu.c
@@ -14,6 +14,7 @@
#include <asm/processor.h>
#include <asm/io.h>
#include <asm/fpu.h>
+#include <asm/traps.h>
/* The PR (precision) bit in the FP Status Register must be clear when
* an frchg instruction is executed, otherwise the instruction is undefined.
diff --git a/arch/sh/kernel/cpu/sh4/fpu.c b/arch/sh/kernel/cpu/sh4/fpu.c
index e74cd6c..69ab4d3 100644
--- a/arch/sh/kernel/cpu/sh4/fpu.c
+++ b/arch/sh/kernel/cpu/sh4/fpu.c
@@ -16,6 +16,7 @@
#include <cpu/fpu.h>
#include <asm/processor.h>
#include <asm/fpu.h>
+#include <asm/traps.h>
/* The PR (precision) bit in the FP Status Register must be clear when
* an frchg instruction is executed, otherwise the instruction is undefined.
diff --git a/arch/sh/kernel/cpu/sh4a/clock-sh7757.c b/arch/sh/kernel/cpu/sh4a/clock-sh7757.c
index 5853989..04ab5ae 100644
--- a/arch/sh/kernel/cpu/sh4a/clock-sh7757.c
+++ b/arch/sh/kernel/cpu/sh4a/clock-sh7757.c
@@ -113,7 +113,7 @@ static struct clk_lookup lookups[] = {
CLKDEV_CON_ID("cpu_clk", &div4_clks[DIV4_I]),
/* MSTP32 clocks */
- CLKDEV_CON_ID("sdhi0", &mstp_clks[MSTP004]),
+ CLKDEV_DEV_ID("sh_mobile_sdhi.0", &mstp_clks[MSTP004]),
CLKDEV_CON_ID("riic0", &mstp_clks[MSTP000]),
CLKDEV_CON_ID("riic1", &mstp_clks[MSTP000]),
CLKDEV_CON_ID("riic2", &mstp_clks[MSTP000]),
diff --git a/arch/sh/kernel/cpu/shmobile/pm.c b/arch/sh/kernel/cpu/shmobile/pm.c
index a6f95ae..08d27fa 100644
--- a/arch/sh/kernel/cpu/shmobile/pm.c
+++ b/arch/sh/kernel/cpu/shmobile/pm.c
@@ -16,6 +16,7 @@
#include <asm/suspend.h>
#include <asm/uaccess.h>
#include <asm/cacheflush.h>
+#include <asm/bl_bit.h>
/*
* Notifier lists for pre/post sleep notification
diff --git a/arch/sh/kernel/idle.c b/arch/sh/kernel/idle.c
index 64852ec..ee226e2 100644
--- a/arch/sh/kernel/idle.c
+++ b/arch/sh/kernel/idle.c
@@ -17,8 +17,8 @@
#include <linux/irqflags.h>
#include <linux/smp.h>
#include <linux/cpuidle.h>
-#include <asm/pgalloc.h>
#include <linux/atomic.h>
+#include <asm/pgalloc.h>
#include <asm/smp.h>
#include <asm/bl_bit.h>
diff --git a/arch/sh/kernel/kgdb.c b/arch/sh/kernel/kgdb.c
index efb6d39..b117781 100644
--- a/arch/sh/kernel/kgdb.c
+++ b/arch/sh/kernel/kgdb.c
@@ -14,6 +14,7 @@
#include <linux/irq.h>
#include <linux/io.h>
#include <asm/cacheflush.h>
+#include <asm/traps.h>
/* Macros for single step instruction identification */
#define OPCODE_BT(op) (((op) & 0xff00) == 0x8900)
diff --git a/arch/sh/kernel/process_32.c b/arch/sh/kernel/process_32.c
index f72e3a9..94273aa 100644
--- a/arch/sh/kernel/process_32.c
+++ b/arch/sh/kernel/process_32.c
@@ -26,6 +26,7 @@
#include <asm/mmu_context.h>
#include <asm/fpu.h>
#include <asm/syscalls.h>
+#include <asm/switch_to.h>
void show_regs(struct pt_regs * regs)
{
diff --git a/arch/sh/kernel/smp.c b/arch/sh/kernel/smp.c
index a17a14d..eaebdf6 100644
--- a/arch/sh/kernel/smp.c
+++ b/arch/sh/kernel/smp.c
@@ -27,6 +27,7 @@
#include <asm/smp.h>
#include <asm/cacheflush.h>
#include <asm/sections.h>
+#include <asm/setup.h>
int __cpu_number_map[NR_CPUS]; /* Map physical to logical */
int __cpu_logical_map[NR_CPUS]; /* Map logical to physical */
diff --git a/arch/sh/kernel/vsyscall/vsyscall-sigreturn.S b/arch/sh/kernel/vsyscall/vsyscall-sigreturn.S
index 555a64f..23af175 100644
--- a/arch/sh/kernel/vsyscall/vsyscall-sigreturn.S
+++ b/arch/sh/kernel/vsyscall/vsyscall-sigreturn.S
@@ -34,6 +34,41 @@ __kernel_rt_sigreturn:
1: .short __NR_rt_sigreturn
.LEND_rt_sigreturn:
.size __kernel_rt_sigreturn,.-.LSTART_rt_sigreturn
+ .previous
.section .eh_frame,"a",@progbits
+.LCIE1:
+ .ualong .LCIE1_end - .LCIE1_start
+.LCIE1_start:
+ .ualong 0 /* CIE ID */
+ .byte 0x1 /* Version number */
+ .string "zRS" /* NUL-terminated augmentation string */
+ .uleb128 0x1 /* Code alignment factor */
+ .sleb128 -4 /* Data alignment factor */
+ .byte 0x11 /* Return address register column */
+ .uleb128 0x1 /* Augmentation length and data */
+ .byte 0x1b /* DW_EH_PE_pcrel | DW_EH_PE_sdata4. */
+ .byte 0xc, 0xf, 0x0 /* DW_CFA_def_cfa: r15 ofs 0 */
+
+ .align 2
+.LCIE1_end:
+
+ .ualong .LFDE0_end-.LFDE0_start /* Length FDE0 */
+.LFDE0_start:
+ .ualong .LFDE0_start-.LCIE1 /* CIE pointer */
+ .ualong .LSTART_sigreturn-. /* PC-relative start address */
+ .ualong .LEND_sigreturn-.LSTART_sigreturn
+ .uleb128 0 /* Augmentation */
+ .align 2
+.LFDE0_end:
+
+ .ualong .LFDE1_end-.LFDE1_start /* Length FDE1 */
+.LFDE1_start:
+ .ualong .LFDE1_start-.LCIE1 /* CIE pointer */
+ .ualong .LSTART_rt_sigreturn-. /* PC-relative start address */
+ .ualong .LEND_rt_sigreturn-.LSTART_rt_sigreturn
+ .uleb128 0 /* Augmentation */
+ .align 2
+.LFDE1_end:
+
.previous
diff --git a/arch/sh/kernel/vsyscall/vsyscall-trapa.S b/arch/sh/kernel/vsyscall/vsyscall-trapa.S
index 3e70f85..0eb74d0 100644
--- a/arch/sh/kernel/vsyscall/vsyscall-trapa.S
+++ b/arch/sh/kernel/vsyscall/vsyscall-trapa.S
@@ -3,37 +3,34 @@
.type __kernel_vsyscall,@function
__kernel_vsyscall:
.LSTART_vsyscall:
- /* XXX: We'll have to do something here once we opt to use the vDSO
- * page for something other than the signal trampoline.. as well as
- * fill out .eh_frame -- PFM. */
+ trapa #0x10
+ nop
.LEND_vsyscall:
.size __kernel_vsyscall,.-.LSTART_vsyscall
+ .previous
.section .eh_frame,"a",@progbits
- .previous
.LCIE:
.ualong .LCIE_end - .LCIE_start
.LCIE_start:
.ualong 0 /* CIE ID */
.byte 0x1 /* Version number */
- .string "zRS" /* NUL-terminated augmentation string */
+ .string "zR" /* NUL-terminated augmentation string */
.uleb128 0x1 /* Code alignment factor */
.sleb128 -4 /* Data alignment factor */
.byte 0x11 /* Return address register column */
- /* Augmentation length and data (none) */
- .byte 0xc /* DW_CFA_def_cfa */
- .uleb128 0xf /* r15 */
- .uleb128 0x0 /* offset 0 */
-
+ .uleb128 0x1 /* Augmentation length and data */
+ .byte 0x1b /* DW_EH_PE_pcrel | DW_EH_PE_sdata4. */
+ .byte 0xc,0xf,0x0 /* DW_CFA_def_cfa: r15 ofs 0 */
.align 2
.LCIE_end:
.ualong .LFDE_end-.LFDE_start /* Length FDE */
.LFDE_start:
- .ualong .LCIE /* CIE pointer */
- .ualong .LSTART_vsyscall-. /* start address */
+ .ualong .LFDE_start-.LCIE /* CIE pointer */
+ .ualong .LSTART_vsyscall-. /* PC-relative start address */
.ualong .LEND_vsyscall-.LSTART_vsyscall
- .uleb128 0
+ .uleb128 0 /* Augmentation */
.align 2
.LFDE_end:
.previous
diff --git a/arch/sh/mm/cache-sh4.c b/arch/sh/mm/cache-sh4.c
index 112fea1..0e52928 100644
--- a/arch/sh/mm/cache-sh4.c
+++ b/arch/sh/mm/cache-sh4.c
@@ -18,6 +18,7 @@
#include <linux/highmem.h>
#include <asm/pgtable.h>
#include <asm/mmu_context.h>
+#include <asm/cache_insns.h>
#include <asm/cacheflush.h>
/*
diff --git a/arch/sh/mm/flush-sh4.c b/arch/sh/mm/flush-sh4.c
index 75a17f5..0b85dd9 100644
--- a/arch/sh/mm/flush-sh4.c
+++ b/arch/sh/mm/flush-sh4.c
@@ -1,5 +1,6 @@
#include <linux/mm.h>
#include <asm/mmu_context.h>
+#include <asm/cache_insns.h>
#include <asm/cacheflush.h>
#include <asm/traps.h>
diff --git a/arch/sh/mm/sram.c b/arch/sh/mm/sram.c
index bc156ec..2d8fa71 100644
--- a/arch/sh/mm/sram.c
+++ b/arch/sh/mm/sram.c
@@ -9,6 +9,7 @@
*/
#include <linux/init.h>
#include <linux/kernel.h>
+#include <linux/errno.h>
#include <asm/sram.h>
/*
diff --git a/arch/sparc/kernel/leon_pci.c b/arch/sparc/kernel/leon_pci.c
index aba6b95..19f5605 100644
--- a/arch/sparc/kernel/leon_pci.c
+++ b/arch/sparc/kernel/leon_pci.c
@@ -45,7 +45,6 @@ void leon_pci_init(struct platform_device *ofdev, struct leon_pci_info *info)
void __devinit pcibios_fixup_bus(struct pci_bus *pbus)
{
- struct leon_pci_info *info = pbus->sysdata;
struct pci_dev *dev;
int i, has_io, has_mem;
u16 cmd;
@@ -111,18 +110,6 @@ int pcibios_enable_device(struct pci_dev *dev, int mask)
return pci_enable_resources(dev, mask);
}
-struct device_node *pci_device_to_OF_node(struct pci_dev *pdev)
-{
- /*
- * Currently the OpenBoot nodes are not connected with the PCI device,
- * this is because the LEON PROM does not create PCI nodes. Eventually
- * this will change and the same approach as pcic.c can be used to
- * match PROM nodes with pci devices.
- */
- return NULL;
-}
-EXPORT_SYMBOL(pci_device_to_OF_node);
-
void __devinit pcibios_update_irq(struct pci_dev *dev, int irq)
{
#ifdef CONFIG_PCI_DEBUG
diff --git a/arch/sparc/mm/fault_32.c b/arch/sparc/mm/fault_32.c
index 7705c67..df3155a 100644
--- a/arch/sparc/mm/fault_32.c
+++ b/arch/sparc/mm/fault_32.c
@@ -225,6 +225,8 @@ asmlinkage void do_sparc_fault(struct pt_regs *regs, int text_fault, int write,
unsigned long g2;
int from_user = !(regs->psr & PSR_PS);
int fault, code;
+ unsigned int flags = (FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE |
+ (write ? FAULT_FLAG_WRITE : 0));
if(text_fault)
address = regs->pc;
@@ -251,6 +253,7 @@ asmlinkage void do_sparc_fault(struct pt_regs *regs, int text_fault, int write,
perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address);
+retry:
down_read(&mm->mmap_sem);
/*
@@ -289,7 +292,11 @@ good_area:
* make sure we exit gracefully rather than endlessly redo
* the fault.
*/
- fault = handle_mm_fault(mm, vma, address, write ? FAULT_FLAG_WRITE : 0);
+ fault = handle_mm_fault(mm, vma, address, flags);
+
+ if ((fault & VM_FAULT_RETRY) && fatal_signal_pending(current))
+ return;
+
if (unlikely(fault & VM_FAULT_ERROR)) {
if (fault & VM_FAULT_OOM)
goto out_of_memory;
@@ -297,13 +304,29 @@ good_area:
goto do_sigbus;
BUG();
}
- if (fault & VM_FAULT_MAJOR) {
- current->maj_flt++;
- perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MAJ, 1, regs, address);
- } else {
- current->min_flt++;
- perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MIN, 1, regs, address);
+
+ if (flags & FAULT_FLAG_ALLOW_RETRY) {
+ if (fault & VM_FAULT_MAJOR) {
+ current->maj_flt++;
+ perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MAJ,
+ 1, regs, address);
+ } else {
+ current->min_flt++;
+ perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MIN,
+ 1, regs, address);
+ }
+ if (fault & VM_FAULT_RETRY) {
+ flags &= ~FAULT_FLAG_ALLOW_RETRY;
+
+ /* No need to up_read(&mm->mmap_sem) as we would
+ * have already released it in __lock_page_or_retry
+ * in mm/filemap.c.
+ */
+
+ goto retry;
+ }
}
+
up_read(&mm->mmap_sem);
return;
diff --git a/arch/sparc/mm/fault_64.c b/arch/sparc/mm/fault_64.c
index 504c062..1fe0429 100644
--- a/arch/sparc/mm/fault_64.c
+++ b/arch/sparc/mm/fault_64.c
@@ -279,6 +279,7 @@ asmlinkage void __kprobes do_sparc64_fault(struct pt_regs *regs)
unsigned int insn = 0;
int si_code, fault_code, fault;
unsigned long address, mm_rss;
+ unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;
fault_code = get_thread_fault_code();
@@ -333,6 +334,8 @@ asmlinkage void __kprobes do_sparc64_fault(struct pt_regs *regs)
insn = get_fault_insn(regs, insn);
goto handle_kernel_fault;
}
+
+retry:
down_read(&mm->mmap_sem);
}
@@ -423,7 +426,12 @@ good_area:
goto bad_area;
}
- fault = handle_mm_fault(mm, vma, address, (fault_code & FAULT_CODE_WRITE) ? FAULT_FLAG_WRITE : 0);
+ flags |= ((fault_code & FAULT_CODE_WRITE) ? FAULT_FLAG_WRITE : 0);
+ fault = handle_mm_fault(mm, vma, address, flags);
+
+ if ((fault & VM_FAULT_RETRY) && fatal_signal_pending(current))
+ return;
+
if (unlikely(fault & VM_FAULT_ERROR)) {
if (fault & VM_FAULT_OOM)
goto out_of_memory;
@@ -431,12 +439,27 @@ good_area:
goto do_sigbus;
BUG();
}
- if (fault & VM_FAULT_MAJOR) {
- current->maj_flt++;
- perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MAJ, 1, regs, address);
- } else {
- current->min_flt++;
- perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MIN, 1, regs, address);
+
+ if (flags & FAULT_FLAG_ALLOW_RETRY) {
+ if (fault & VM_FAULT_MAJOR) {
+ current->maj_flt++;
+ perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MAJ,
+ 1, regs, address);
+ } else {
+ current->min_flt++;
+ perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MIN,
+ 1, regs, address);
+ }
+ if (fault & VM_FAULT_RETRY) {
+ flags &= ~FAULT_FLAG_ALLOW_RETRY;
+
+ /* No need to up_read(&mm->mmap_sem) as we would
+ * have already released it in __lock_page_or_retry
+ * in mm/filemap.c.
+ */
+
+ goto retry;
+ }
}
up_read(&mm->mmap_sem);
diff --git a/arch/tile/Kconfig b/arch/tile/Kconfig
index 11270ca..96033e2 100644
--- a/arch/tile/Kconfig
+++ b/arch/tile/Kconfig
@@ -12,7 +12,7 @@ config TILE
select GENERIC_PENDING_IRQ if SMP
select GENERIC_IRQ_SHOW
select SYS_HYPERVISOR
- select ARCH_HAVE_NMI_SAFE_CMPXCHG if !M386
+ select ARCH_HAVE_NMI_SAFE_CMPXCHG
# FIXME: investigate whether we need/want these options.
# select HAVE_IOREMAP_PROT
@@ -69,6 +69,9 @@ config ARCH_PHYS_ADDR_T_64BIT
config ARCH_DMA_ADDR_T_64BIT
def_bool y
+config NEED_DMA_MAP_STATE
+ def_bool y
+
config LOCKDEP_SUPPORT
def_bool y
@@ -118,7 +121,7 @@ config 64BIT
config ARCH_DEFCONFIG
string
- default "arch/tile/configs/tile_defconfig" if !TILEGX
+ default "arch/tile/configs/tilepro_defconfig" if !TILEGX
default "arch/tile/configs/tilegx_defconfig" if TILEGX
source "init/Kconfig"
@@ -240,6 +243,7 @@ endchoice
config PAGE_OFFSET
hex
+ depends on !64BIT
default 0xF0000000 if VMSPLIT_3_75G
default 0xE0000000 if VMSPLIT_3_5G
default 0xB0000000 if VMSPLIT_2_75G
diff --git a/arch/tile/Makefile b/arch/tile/Makefile
index 17acce7..9520bc5 100644
--- a/arch/tile/Makefile
+++ b/arch/tile/Makefile
@@ -30,7 +30,8 @@ ifneq ($(CONFIG_DEBUG_EXTRA_FLAGS),"")
KBUILD_CFLAGS += $(CONFIG_DEBUG_EXTRA_FLAGS)
endif
-LIBGCC_PATH := $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)
+LIBGCC_PATH := \
+ $(shell $(CC) $(KBUILD_CFLAGS) $(KCFLAGS) -print-libgcc-file-name)
# Provide the path to use for "make defconfig".
KBUILD_DEFCONFIG := $(ARCH)_defconfig
@@ -53,8 +54,6 @@ libs-y += $(LIBGCC_PATH)
# See arch/tile/Kbuild for content of core part of the kernel
core-y += arch/tile/
-core-$(CONFIG_KVM) += arch/tile/kvm/
-
ifdef TILERA_ROOT
INSTALL_PATH ?= $(TILERA_ROOT)/tile/boot
endif
diff --git a/arch/tile/include/arch/spr_def.h b/arch/tile/include/arch/spr_def.h
index f548efe..d6ba449 100644
--- a/arch/tile/include/arch/spr_def.h
+++ b/arch/tile/include/arch/spr_def.h
@@ -60,8 +60,8 @@
_concat4(SPR_IPI_EVENT_, CONFIG_KERNEL_PL,,)
#define SPR_IPI_EVENT_RESET_K \
_concat4(SPR_IPI_EVENT_RESET_, CONFIG_KERNEL_PL,,)
-#define SPR_IPI_MASK_SET_K \
- _concat4(SPR_IPI_MASK_SET_, CONFIG_KERNEL_PL,,)
+#define SPR_IPI_EVENT_SET_K \
+ _concat4(SPR_IPI_EVENT_SET_, CONFIG_KERNEL_PL,,)
#define INT_IPI_K \
_concat4(INT_IPI_, CONFIG_KERNEL_PL,,)
diff --git a/arch/tile/include/asm/atomic.h b/arch/tile/include/asm/atomic.h
index bb696da..f246142 100644
--- a/arch/tile/include/asm/atomic.h
+++ b/arch/tile/include/asm/atomic.h
@@ -17,6 +17,8 @@
#ifndef _ASM_TILE_ATOMIC_H
#define _ASM_TILE_ATOMIC_H
+#include <asm/cmpxchg.h>
+
#ifndef __ASSEMBLY__
#include <linux/compiler.h>
@@ -121,54 +123,6 @@ static inline int atomic_read(const atomic_t *v)
*/
#define atomic_add_negative(i, v) (atomic_add_return((i), (v)) < 0)
-/* Nonexistent functions intended to cause link errors. */
-extern unsigned long __xchg_called_with_bad_pointer(void);
-extern unsigned long __cmpxchg_called_with_bad_pointer(void);
-
-#define xchg(ptr, x) \
- ({ \
- typeof(*(ptr)) __x; \
- switch (sizeof(*(ptr))) { \
- case 4: \
- __x = (typeof(__x))(typeof(__x-__x))atomic_xchg( \
- (atomic_t *)(ptr), \
- (u32)(typeof((x)-(x)))(x)); \
- break; \
- case 8: \
- __x = (typeof(__x))(typeof(__x-__x))atomic64_xchg( \
- (atomic64_t *)(ptr), \
- (u64)(typeof((x)-(x)))(x)); \
- break; \
- default: \
- __xchg_called_with_bad_pointer(); \
- } \
- __x; \
- })
-
-#define cmpxchg(ptr, o, n) \
- ({ \
- typeof(*(ptr)) __x; \
- switch (sizeof(*(ptr))) { \
- case 4: \
- __x = (typeof(__x))(typeof(__x-__x))atomic_cmpxchg( \
- (atomic_t *)(ptr), \
- (u32)(typeof((o)-(o)))(o), \
- (u32)(typeof((n)-(n)))(n)); \
- break; \
- case 8: \
- __x = (typeof(__x))(typeof(__x-__x))atomic64_cmpxchg( \
- (atomic64_t *)(ptr), \
- (u64)(typeof((o)-(o)))(o), \
- (u64)(typeof((n)-(n)))(n)); \
- break; \
- default: \
- __cmpxchg_called_with_bad_pointer(); \
- } \
- __x; \
- })
-
-#define tas(ptr) (xchg((ptr), 1))
-
#endif /* __ASSEMBLY__ */
#ifndef __tilegx__
diff --git a/arch/tile/include/asm/atomic_32.h b/arch/tile/include/asm/atomic_32.h
index 466dc4a..54d1da8 100644
--- a/arch/tile/include/asm/atomic_32.h
+++ b/arch/tile/include/asm/atomic_32.h
@@ -200,7 +200,7 @@ static inline u64 atomic64_add_return(u64 i, atomic64_t *v)
* @u: ...unless v is equal to u.
*
* Atomically adds @a to @v, so long as @v was not already @u.
- * Returns the old value of @v.
+ * Returns non-zero if @v was not @u, and zero otherwise.
*/
static inline u64 atomic64_add_unless(atomic64_t *v, u64 a, u64 u)
{
diff --git a/arch/tile/include/asm/bitops_64.h b/arch/tile/include/asm/bitops_64.h
index 58d021a..60b87ee 100644
--- a/arch/tile/include/asm/bitops_64.h
+++ b/arch/tile/include/asm/bitops_64.h
@@ -38,10 +38,10 @@ static inline void clear_bit(unsigned nr, volatile unsigned long *addr)
static inline void change_bit(unsigned nr, volatile unsigned long *addr)
{
- unsigned long old, mask = (1UL << (nr % BITS_PER_LONG));
- long guess, oldval;
+ unsigned long mask = (1UL << (nr % BITS_PER_LONG));
+ unsigned long guess, oldval;
addr += nr / BITS_PER_LONG;
- old = *addr;
+ oldval = *addr;
do {
guess = oldval;
oldval = atomic64_cmpxchg((atomic64_t *)addr,
@@ -85,7 +85,7 @@ static inline int test_and_change_bit(unsigned nr,
volatile unsigned long *addr)
{
unsigned long mask = (1UL << (nr % BITS_PER_LONG));
- long guess, oldval = *addr;
+ unsigned long guess, oldval;
addr += nr / BITS_PER_LONG;
oldval = *addr;
do {
diff --git a/arch/tile/include/asm/cmpxchg.h b/arch/tile/include/asm/cmpxchg.h
new file mode 100644
index 0000000..276f067
--- /dev/null
+++ b/arch/tile/include/asm/cmpxchg.h
@@ -0,0 +1,73 @@
+/*
+ * cmpxchg.h -- forked from asm/atomic.h with this copyright:
+ *
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, version 2.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for
+ * more details.
+ *
+ */
+
+#ifndef _ASM_TILE_CMPXCHG_H
+#define _ASM_TILE_CMPXCHG_H
+
+#ifndef __ASSEMBLY__
+
+/* Nonexistent functions intended to cause link errors. */
+extern unsigned long __xchg_called_with_bad_pointer(void);
+extern unsigned long __cmpxchg_called_with_bad_pointer(void);
+
+#define xchg(ptr, x) \
+ ({ \
+ typeof(*(ptr)) __x; \
+ switch (sizeof(*(ptr))) { \
+ case 4: \
+ __x = (typeof(__x))(typeof(__x-__x))atomic_xchg( \
+ (atomic_t *)(ptr), \
+ (u32)(typeof((x)-(x)))(x)); \
+ break; \
+ case 8: \
+ __x = (typeof(__x))(typeof(__x-__x))atomic64_xchg( \
+ (atomic64_t *)(ptr), \
+ (u64)(typeof((x)-(x)))(x)); \
+ break; \
+ default: \
+ __xchg_called_with_bad_pointer(); \
+ } \
+ __x; \
+ })
+
+#define cmpxchg(ptr, o, n) \
+ ({ \
+ typeof(*(ptr)) __x; \
+ switch (sizeof(*(ptr))) { \
+ case 4: \
+ __x = (typeof(__x))(typeof(__x-__x))atomic_cmpxchg( \
+ (atomic_t *)(ptr), \
+ (u32)(typeof((o)-(o)))(o), \
+ (u32)(typeof((n)-(n)))(n)); \
+ break; \
+ case 8: \
+ __x = (typeof(__x))(typeof(__x-__x))atomic64_cmpxchg( \
+ (atomic64_t *)(ptr), \
+ (u64)(typeof((o)-(o)))(o), \
+ (u64)(typeof((n)-(n)))(n)); \
+ break; \
+ default: \
+ __cmpxchg_called_with_bad_pointer(); \
+ } \
+ __x; \
+ })
+
+#define tas(ptr) (xchg((ptr), 1))
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* _ASM_TILE_CMPXCHG_H */
diff --git a/arch/tile/include/asm/irq.h b/arch/tile/include/asm/irq.h
index f80f8ce..33cff9a 100644
--- a/arch/tile/include/asm/irq.h
+++ b/arch/tile/include/asm/irq.h
@@ -21,7 +21,7 @@
#define NR_IRQS 32
/* IRQ numbers used for linux IPIs. */
-#define IRQ_RESCHEDULE 1
+#define IRQ_RESCHEDULE 0
#define irq_canonicalize(irq) (irq)
diff --git a/arch/tile/include/asm/spinlock_64.h b/arch/tile/include/asm/spinlock_64.h
index 72be590..5f8b6a0 100644
--- a/arch/tile/include/asm/spinlock_64.h
+++ b/arch/tile/include/asm/spinlock_64.h
@@ -137,7 +137,7 @@ static inline void arch_read_unlock(arch_rwlock_t *rw)
static inline void arch_write_unlock(arch_rwlock_t *rw)
{
__insn_mf();
- rw->lock = 0;
+ __insn_exch4(&rw->lock, 0); /* Avoid waiting in the write buffer. */
}
static inline int arch_read_trylock(arch_rwlock_t *rw)
diff --git a/arch/tile/include/asm/stack.h b/arch/tile/include/asm/stack.h
index 4d97a2d..0e9d382a 100644
--- a/arch/tile/include/asm/stack.h
+++ b/arch/tile/include/asm/stack.h
@@ -25,7 +25,6 @@
struct KBacktraceIterator {
BacktraceIterator it;
struct task_struct *task; /* task we are backtracing */
- pte_t *pgtable; /* page table for user space access */
int end; /* iteration complete. */
int new_context; /* new context is starting */
int profile; /* profiling, so stop on async intrpt */
diff --git a/arch/tile/include/asm/traps.h b/arch/tile/include/asm/traps.h
index 5f20f92..e28c3df4 100644
--- a/arch/tile/include/asm/traps.h
+++ b/arch/tile/include/asm/traps.h
@@ -64,7 +64,11 @@ void do_breakpoint(struct pt_regs *, int fault_num);
#ifdef __tilegx__
+/* kernel/single_step.c */
void gx_singlestep_handle(struct pt_regs *, int fault_num);
+
+/* kernel/intvec_64.S */
+void fill_ra_stack(void);
#endif
-#endif /* _ASM_TILE_SYSCALLS_H */
+#endif /* _ASM_TILE_TRAPS_H */
diff --git a/arch/tile/kernel/entry.S b/arch/tile/kernel/entry.S
index 431e9ae6..ec91568 100644
--- a/arch/tile/kernel/entry.S
+++ b/arch/tile/kernel/entry.S
@@ -85,6 +85,7 @@ STD_ENTRY(cpu_idle_on_new_stack)
/* Loop forever on a nap during SMP boot. */
STD_ENTRY(smp_nap)
nap
+ nop /* avoid provoking the icache prefetch with a jump */
j smp_nap /* we are not architecturally guaranteed not to exit nap */
jrp lr /* clue in the backtracer */
STD_ENDPROC(smp_nap)
@@ -105,5 +106,6 @@ STD_ENTRY(_cpu_idle)
.global _cpu_idle_nap
_cpu_idle_nap:
nap
+ nop /* avoid provoking the icache prefetch with a jump */
jrp lr
STD_ENDPROC(_cpu_idle)
diff --git a/arch/tile/kernel/intvec_32.S b/arch/tile/kernel/intvec_32.S
index aecc8ed..5d56a1e 100644
--- a/arch/tile/kernel/intvec_32.S
+++ b/arch/tile/kernel/intvec_32.S
@@ -799,6 +799,10 @@ handle_interrupt:
* This routine takes a boolean in r30 indicating if this is an NMI.
* If so, we also expect a boolean in r31 indicating whether to
* re-enable the oprofile interrupts.
+ *
+ * Note that .Lresume_userspace is jumped to directly in several
+ * places, and we need to make sure r30 is set correctly in those
+ * callers as well.
*/
STD_ENTRY(interrupt_return)
/* If we're resuming to kernel space, don't check thread flags. */
@@ -1237,7 +1241,10 @@ handle_syscall:
bzt r30, 1f
jal do_syscall_trace
FEEDBACK_REENTER(handle_syscall)
-1: j .Lresume_userspace /* jump into middle of interrupt_return */
+1: {
+ movei r30, 0 /* not an NMI */
+ j .Lresume_userspace /* jump into middle of interrupt_return */
+ }
.Linvalid_syscall:
/* Report an invalid syscall back to the user program */
@@ -1246,7 +1253,10 @@ handle_syscall:
movei r28, -ENOSYS
}
sw r29, r28
- j .Lresume_userspace /* jump into middle of interrupt_return */
+ {
+ movei r30, 0 /* not an NMI */
+ j .Lresume_userspace /* jump into middle of interrupt_return */
+ }
STD_ENDPROC(handle_syscall)
/* Return the address for oprofile to suppress in backtraces. */
@@ -1262,7 +1272,10 @@ STD_ENTRY(ret_from_fork)
jal sim_notify_fork
jal schedule_tail
FEEDBACK_REENTER(ret_from_fork)
- j .Lresume_userspace /* jump into middle of interrupt_return */
+ {
+ movei r30, 0 /* not an NMI */
+ j .Lresume_userspace /* jump into middle of interrupt_return */
+ }
STD_ENDPROC(ret_from_fork)
/*
@@ -1376,7 +1389,10 @@ handle_ill:
jal send_sigtrap /* issue a SIGTRAP */
FEEDBACK_REENTER(handle_ill)
- j .Lresume_userspace /* jump into middle of interrupt_return */
+ {
+ movei r30, 0 /* not an NMI */
+ j .Lresume_userspace /* jump into middle of interrupt_return */
+ }
.Ldispatch_normal_ill:
{
diff --git a/arch/tile/kernel/intvec_64.S b/arch/tile/kernel/intvec_64.S
index 79c93e1..49d9d66 100644
--- a/arch/tile/kernel/intvec_64.S
+++ b/arch/tile/kernel/intvec_64.S
@@ -22,6 +22,7 @@
#include <asm/irqflags.h>
#include <asm/asm-offsets.h>
#include <asm/types.h>
+#include <asm/signal.h>
#include <hv/hypervisor.h>
#include <arch/abi.h>
#include <arch/interrupts.h>
@@ -605,6 +606,10 @@ handle_interrupt:
* This routine takes a boolean in r30 indicating if this is an NMI.
* If so, we also expect a boolean in r31 indicating whether to
* re-enable the oprofile interrupts.
+ *
+ * Note that .Lresume_userspace is jumped to directly in several
+ * places, and we need to make sure r30 is set correctly in those
+ * callers as well.
*/
STD_ENTRY(interrupt_return)
/* If we're resuming to kernel space, don't check thread flags. */
@@ -1039,11 +1044,28 @@ handle_syscall:
/* Do syscall trace again, if requested. */
ld r30, r31
- andi r30, r30, _TIF_SYSCALL_TRACE
- beqzt r30, 1f
+ andi r0, r30, _TIF_SYSCALL_TRACE
+ {
+ andi r0, r30, _TIF_SINGLESTEP
+ beqzt r0, 1f
+ }
jal do_syscall_trace
FEEDBACK_REENTER(handle_syscall)
-1: j .Lresume_userspace /* jump into middle of interrupt_return */
+ andi r0, r30, _TIF_SINGLESTEP
+
+1: beqzt r0, 2f
+
+ /* Single stepping -- notify ptrace. */
+ {
+ movei r0, SIGTRAP
+ jal ptrace_notify
+ }
+ FEEDBACK_REENTER(handle_syscall)
+
+2: {
+ movei r30, 0 /* not an NMI */
+ j .Lresume_userspace /* jump into middle of interrupt_return */
+ }
.Lcompat_syscall:
/*
@@ -1077,7 +1099,10 @@ handle_syscall:
movei r28, -ENOSYS
}
st r29, r28
- j .Lresume_userspace /* jump into middle of interrupt_return */
+ {
+ movei r30, 0 /* not an NMI */
+ j .Lresume_userspace /* jump into middle of interrupt_return */
+ }
STD_ENDPROC(handle_syscall)
/* Return the address for oprofile to suppress in backtraces. */
@@ -1093,7 +1118,10 @@ STD_ENTRY(ret_from_fork)
jal sim_notify_fork
jal schedule_tail
FEEDBACK_REENTER(ret_from_fork)
- j .Lresume_userspace
+ {
+ movei r30, 0 /* not an NMI */
+ j .Lresume_userspace /* jump into middle of interrupt_return */
+ }
STD_ENDPROC(ret_from_fork)
/* Various stub interrupt handlers and syscall handlers */
@@ -1156,6 +1184,18 @@ int_unalign:
push_extra_callee_saves r0
j do_trap
+/* Fill the return address stack with nonzero entries. */
+STD_ENTRY(fill_ra_stack)
+ {
+ move r0, lr
+ jal 1f
+ }
+1: jal 2f
+2: jal 3f
+3: jal 4f
+4: jrp r0
+ STD_ENDPROC(fill_ra_stack)
+
/* Include .intrpt1 array of interrupt vectors */
.section ".intrpt1", "ax"
@@ -1166,7 +1206,7 @@ int_unalign:
#define do_hardwall_trap bad_intr
#endif
- int_hand INT_MEM_ERROR, MEM_ERROR, bad_intr
+ int_hand INT_MEM_ERROR, MEM_ERROR, do_trap
int_hand INT_SINGLE_STEP_3, SINGLE_STEP_3, bad_intr
#if CONFIG_KERNEL_PL == 2
int_hand INT_SINGLE_STEP_2, SINGLE_STEP_2, gx_singlestep_handle
diff --git a/arch/tile/kernel/module.c b/arch/tile/kernel/module.c
index b90ab99..98d4769 100644
--- a/arch/tile/kernel/module.c
+++ b/arch/tile/kernel/module.c
@@ -67,6 +67,8 @@ void *module_alloc(unsigned long size)
area = __get_vm_area(size, VM_ALLOC, MEM_MODULE_START, MEM_MODULE_END);
if (!area)
goto error;
+ area->nr_pages = npages;
+ area->pages = pages;
if (map_vm_area(area, prot_rwx, &pages)) {
vunmap(area->addr);
diff --git a/arch/tile/kernel/proc.c b/arch/tile/kernel/proc.c
index 7a93270..446a7f5 100644
--- a/arch/tile/kernel/proc.c
+++ b/arch/tile/kernel/proc.c
@@ -146,7 +146,6 @@ static ctl_table unaligned_table[] = {
},
{}
};
-#endif
static struct ctl_path tile_path[] = {
{ .procname = "tile" },
@@ -155,10 +154,9 @@ static struct ctl_path tile_path[] = {
static int __init proc_sys_tile_init(void)
{
-#ifndef __tilegx__ /* FIXME: GX: no support for unaligned access yet */
register_sysctl_paths(tile_path, unaligned_table);
-#endif
return 0;
}
arch_initcall(proc_sys_tile_init);
+#endif
diff --git a/arch/tile/kernel/process.c b/arch/tile/kernel/process.c
index 30caeca..2d5ef61 100644
--- a/arch/tile/kernel/process.c
+++ b/arch/tile/kernel/process.c
@@ -28,6 +28,7 @@
#include <linux/tracehook.h>
#include <linux/signal.h>
#include <asm/stack.h>
+#include <asm/switch_to.h>
#include <asm/homecache.h>
#include <asm/syscalls.h>
#include <asm/traps.h>
@@ -285,7 +286,7 @@ struct task_struct *validate_current(void)
static struct task_struct corrupt = { .comm = "<corrupt>" };
struct task_struct *tsk = current;
if (unlikely((unsigned long)tsk < PAGE_OFFSET ||
- (void *)tsk > high_memory ||
+ (high_memory && (void *)tsk > high_memory) ||
((unsigned long)tsk & (__alignof__(*tsk) - 1)) != 0)) {
pr_err("Corrupt 'current' %p (sp %#lx)\n", tsk, stack_pointer);
tsk = &corrupt;
diff --git a/arch/tile/kernel/setup.c b/arch/tile/kernel/setup.c
index 92a94f4..bff23f4 100644
--- a/arch/tile/kernel/setup.c
+++ b/arch/tile/kernel/setup.c
@@ -103,13 +103,11 @@ unsigned long __initdata pci_reserve_end_pfn = -1U;
static int __init setup_maxmem(char *str)
{
- long maxmem_mb;
- if (str == NULL || strict_strtol(str, 0, &maxmem_mb) != 0 ||
- maxmem_mb == 0)
+ unsigned long long maxmem;
+ if (str == NULL || (maxmem = memparse(str, NULL)) == 0)
return -EINVAL;
- maxmem_pfn = (maxmem_mb >> (HPAGE_SHIFT - 20)) <<
- (HPAGE_SHIFT - PAGE_SHIFT);
+ maxmem_pfn = (maxmem >> HPAGE_SHIFT) << (HPAGE_SHIFT - PAGE_SHIFT);
pr_info("Forcing RAM used to no more than %dMB\n",
maxmem_pfn >> (20 - PAGE_SHIFT));
return 0;
@@ -119,14 +117,15 @@ early_param("maxmem", setup_maxmem);
static int __init setup_maxnodemem(char *str)
{
char *endp;
- long maxnodemem_mb, node;
+ unsigned long long maxnodemem;
+ long node;
node = str ? simple_strtoul(str, &endp, 0) : INT_MAX;
- if (node >= MAX_NUMNODES || *endp != ':' ||
- strict_strtol(endp+1, 0, &maxnodemem_mb) != 0)
+ if (node >= MAX_NUMNODES || *endp != ':')
return -EINVAL;
- maxnodemem_pfn[node] = (maxnodemem_mb >> (HPAGE_SHIFT - 20)) <<
+ maxnodemem = memparse(endp+1, NULL);
+ maxnodemem_pfn[node] = (maxnodemem >> HPAGE_SHIFT) <<
(HPAGE_SHIFT - PAGE_SHIFT);
pr_info("Forcing RAM used on node %ld to no more than %dMB\n",
node, maxnodemem_pfn[node] >> (20 - PAGE_SHIFT));
@@ -913,6 +912,13 @@ void __cpuinit setup_cpu(int boot)
#ifdef CONFIG_BLK_DEV_INITRD
+/*
+ * Note that the kernel can potentially support other compression
+ * techniques than gz, though we don't do so by default. If we ever
+ * decide to do so we can either look for other filename extensions,
+ * or just allow a file with this name to be compressed with an
+ * arbitrary compressor (somewhat counterintuitively).
+ */
static int __initdata set_initramfs_file;
static char __initdata initramfs_file[128] = "initramfs.cpio.gz";
@@ -928,9 +934,9 @@ static int __init setup_initramfs_file(char *str)
early_param("initramfs_file", setup_initramfs_file);
/*
- * We look for an additional "initramfs.cpio.gz" file in the hvfs.
+ * We look for an "initramfs.cpio.gz" file in the hvfs.
* If there is one, we allocate some memory for it and it will be
- * unpacked to the initramfs after any built-in initramfs_data.
+ * unpacked to the initramfs.
*/
static void __init load_hv_initrd(void)
{
diff --git a/arch/tile/kernel/single_step.c b/arch/tile/kernel/single_step.c
index bc1eb58..9efbc13 100644
--- a/arch/tile/kernel/single_step.c
+++ b/arch/tile/kernel/single_step.c
@@ -153,6 +153,25 @@ static tile_bundle_bits rewrite_load_store_unaligned(
if (((unsigned long)addr % size) == 0)
return bundle;
+ /*
+ * Return SIGBUS with the unaligned address, if requested.
+ * Note that we return SIGBUS even for completely invalid addresses
+ * as long as they are in fact unaligned; this matches what the
+ * tilepro hardware would be doing, if it could provide us with the
+ * actual bad address in an SPR, which it doesn't.
+ */
+ if (unaligned_fixup == 0) {
+ siginfo_t info = {
+ .si_signo = SIGBUS,
+ .si_code = BUS_ADRALN,
+ .si_addr = addr
+ };
+ trace_unhandled_signal("unaligned trap", regs,
+ (unsigned long)addr, SIGBUS);
+ force_sig_info(info.si_signo, &info, current);
+ return (tilepro_bundle_bits) 0;
+ }
+
#ifndef __LITTLE_ENDIAN
# error We assume little-endian representation with copy_xx_user size 2 here
#endif
@@ -192,18 +211,6 @@ static tile_bundle_bits rewrite_load_store_unaligned(
return (tile_bundle_bits) 0;
}
- if (unaligned_fixup == 0) {
- siginfo_t info = {
- .si_signo = SIGBUS,
- .si_code = BUS_ADRALN,
- .si_addr = addr
- };
- trace_unhandled_signal("unaligned trap", regs,
- (unsigned long)addr, SIGBUS);
- force_sig_info(info.si_signo, &info, current);
- return (tile_bundle_bits) 0;
- }
-
if (unaligned_printk || unaligned_fixup_count == 0) {
pr_info("Process %d/%s: PC %#lx: Fixup of"
" unaligned %s at %#lx.\n",
diff --git a/arch/tile/kernel/smp.c b/arch/tile/kernel/smp.c
index a44e103..91da0f7 100644
--- a/arch/tile/kernel/smp.c
+++ b/arch/tile/kernel/smp.c
@@ -103,7 +103,7 @@ static void smp_stop_cpu_interrupt(void)
set_cpu_online(smp_processor_id(), 0);
arch_local_irq_disable_all();
for (;;)
- asm("nap");
+ asm("nap; nop");
}
/* This function calls the 'stop' function on all other CPUs in the system. */
@@ -113,6 +113,12 @@ void smp_send_stop(void)
send_IPI_allbutself(MSG_TAG_STOP_CPU);
}
+/* On panic, just wait; we may get an smp_send_stop() later on. */
+void panic_smp_self_stop(void)
+{
+ while (1)
+ asm("nap; nop");
+}
/*
* Dispatch code called from hv_message_intr() for HV_MSG_TILE hv messages.
diff --git a/arch/tile/kernel/smpboot.c b/arch/tile/kernel/smpboot.c
index b949edc..172aef7 100644
--- a/arch/tile/kernel/smpboot.c
+++ b/arch/tile/kernel/smpboot.c
@@ -196,6 +196,8 @@ void __cpuinit online_secondary(void)
/* This must be done before setting cpu_online_mask */
wmb();
+ notify_cpu_starting(smp_processor_id());
+
/*
* We need to hold call_lock, so there is no inconsistency
* between the time smp_call_function() determines number of
diff --git a/arch/tile/kernel/stack.c b/arch/tile/kernel/stack.c
index 37ee4d0..b2f44c2 100644
--- a/arch/tile/kernel/stack.c
+++ b/arch/tile/kernel/stack.c
@@ -21,10 +21,12 @@
#include <linux/stacktrace.h>
#include <linux/uaccess.h>
#include <linux/mmzone.h>
+#include <linux/dcache.h>
+#include <linux/fs.h>
#include <asm/backtrace.h>
#include <asm/page.h>
-#include <asm/tlbflush.h>
#include <asm/ucontext.h>
+#include <asm/switch_to.h>
#include <asm/sigframe.h>
#include <asm/stack.h>
#include <arch/abi.h>
@@ -44,72 +46,23 @@ static int in_kernel_stack(struct KBacktraceIterator *kbt, unsigned long sp)
return sp >= kstack_base && sp < kstack_base + THREAD_SIZE;
}
-/* Is address valid for reading? */
-static int valid_address(struct KBacktraceIterator *kbt, unsigned long address)
-{
- HV_PTE *l1_pgtable = kbt->pgtable;
- HV_PTE *l2_pgtable;
- unsigned long pfn;
- HV_PTE pte;
- struct page *page;
-
- if (l1_pgtable == NULL)
- return 0; /* can't read user space in other tasks */
-
-#ifdef CONFIG_64BIT
- /* Find the real l1_pgtable by looking in the l0_pgtable. */
- pte = l1_pgtable[HV_L0_INDEX(address)];
- if (!hv_pte_get_present(pte))
- return 0;
- pfn = hv_pte_get_pfn(pte);
- if (pte_huge(pte)) {
- if (!pfn_valid(pfn)) {
- pr_err("L0 huge page has bad pfn %#lx\n", pfn);
- return 0;
- }
- return hv_pte_get_present(pte) && hv_pte_get_readable(pte);
- }
- page = pfn_to_page(pfn);
- BUG_ON(PageHighMem(page)); /* No HIGHMEM on 64-bit. */
- l1_pgtable = (HV_PTE *)pfn_to_kaddr(pfn);
-#endif
- pte = l1_pgtable[HV_L1_INDEX(address)];
- if (!hv_pte_get_present(pte))
- return 0;
- pfn = hv_pte_get_pfn(pte);
- if (pte_huge(pte)) {
- if (!pfn_valid(pfn)) {
- pr_err("huge page has bad pfn %#lx\n", pfn);
- return 0;
- }
- return hv_pte_get_present(pte) && hv_pte_get_readable(pte);
- }
-
- page = pfn_to_page(pfn);
- if (PageHighMem(page)) {
- pr_err("L2 page table not in LOWMEM (%#llx)\n",
- HV_PFN_TO_CPA(pfn));
- return 0;
- }
- l2_pgtable = (HV_PTE *)pfn_to_kaddr(pfn);
- pte = l2_pgtable[HV_L2_INDEX(address)];
- return hv_pte_get_present(pte) && hv_pte_get_readable(pte);
-}
-
/* Callback for backtracer; basically a glorified memcpy */
static bool read_memory_func(void *result, unsigned long address,
unsigned int size, void *vkbt)
{
int retval;
struct KBacktraceIterator *kbt = (struct KBacktraceIterator *)vkbt;
+
+ if (address == 0)
+ return 0;
if (__kernel_text_address(address)) {
/* OK to read kernel code. */
} else if (address >= PAGE_OFFSET) {
/* We only tolerate kernel-space reads of this task's stack */
if (!in_kernel_stack(kbt, address))
return 0;
- } else if (!valid_address(kbt, address)) {
- return 0; /* invalid user-space address */
+ } else if (!kbt->is_current) {
+ return 0; /* can't read from other user address spaces */
}
pagefault_disable();
retval = __copy_from_user_inatomic(result,
@@ -127,6 +80,8 @@ static struct pt_regs *valid_fault_handler(struct KBacktraceIterator* kbt)
unsigned long sp = kbt->it.sp;
struct pt_regs *p;
+ if (sp % sizeof(long) != 0)
+ return NULL;
if (!in_kernel_stack(kbt, sp))
return NULL;
if (!in_kernel_stack(kbt, sp + C_ABI_SAVE_AREA_SIZE + PTREGS_SIZE-1))
@@ -169,27 +124,27 @@ static int is_sigreturn(unsigned long pc)
}
/* Return a pt_regs pointer for a valid signal handler frame */
-static struct pt_regs *valid_sigframe(struct KBacktraceIterator* kbt)
+static struct pt_regs *valid_sigframe(struct KBacktraceIterator* kbt,
+ struct rt_sigframe* kframe)
{
BacktraceIterator *b = &kbt->it;
- if (b->pc == VDSO_BASE) {
- struct rt_sigframe *frame;
- unsigned long sigframe_top =
- b->sp + sizeof(struct rt_sigframe) - 1;
- if (!valid_address(kbt, b->sp) ||
- !valid_address(kbt, sigframe_top)) {
- if (kbt->verbose)
- pr_err(" (odd signal: sp %#lx?)\n",
- (unsigned long)(b->sp));
+ if (b->pc == VDSO_BASE && b->sp < PAGE_OFFSET &&
+ b->sp % sizeof(long) == 0) {
+ int retval;
+ pagefault_disable();
+ retval = __copy_from_user_inatomic(
+ kframe, (void __user __force *)b->sp,
+ sizeof(*kframe));
+ pagefault_enable();
+ if (retval != 0 ||
+ (unsigned int)(kframe->info.si_signo) >= _NSIG)
return NULL;
- }
- frame = (struct rt_sigframe *)b->sp;
if (kbt->verbose) {
pr_err(" <received signal %d>\n",
- frame->info.si_signo);
+ kframe->info.si_signo);
}
- return (struct pt_regs *)&frame->uc.uc_mcontext;
+ return (struct pt_regs *)&kframe->uc.uc_mcontext;
}
return NULL;
}
@@ -202,10 +157,11 @@ static int KBacktraceIterator_is_sigreturn(struct KBacktraceIterator *kbt)
static int KBacktraceIterator_restart(struct KBacktraceIterator *kbt)
{
struct pt_regs *p;
+ struct rt_sigframe kframe;
p = valid_fault_handler(kbt);
if (p == NULL)
- p = valid_sigframe(kbt);
+ p = valid_sigframe(kbt, &kframe);
if (p == NULL)
return 0;
backtrace_init(&kbt->it, read_memory_func, kbt,
@@ -265,41 +221,19 @@ void KBacktraceIterator_init(struct KBacktraceIterator *kbt,
/*
* Set up callback information. We grab the kernel stack base
- * so we will allow reads of that address range, and if we're
- * asking about the current process we grab the page table
- * so we can check user accesses before trying to read them.
- * We flush the TLB to avoid any weird skew issues.
+ * so we will allow reads of that address range.
*/
- is_current = (t == NULL);
+ is_current = (t == NULL || t == current);
kbt->is_current = is_current;
if (is_current)
t = validate_current();
kbt->task = t;
- kbt->pgtable = NULL;
kbt->verbose = 0; /* override in caller if desired */
kbt->profile = 0; /* override in caller if desired */
kbt->end = KBT_ONGOING;
- kbt->new_context = 0;
- if (is_current) {
- HV_PhysAddr pgdir_pa = hv_inquire_context().page_table;
- if (pgdir_pa == (unsigned long)swapper_pg_dir - PAGE_OFFSET) {
- /*
- * Not just an optimization: this also allows
- * this to work at all before va/pa mappings
- * are set up.
- */
- kbt->pgtable = swapper_pg_dir;
- } else {
- struct page *page = pfn_to_page(PFN_DOWN(pgdir_pa));
- if (!PageHighMem(page))
- kbt->pgtable = __va(pgdir_pa);
- else
- pr_err("page table not in LOWMEM"
- " (%#llx)\n", pgdir_pa);
- }
- local_flush_tlb_all();
+ kbt->new_context = 1;
+ if (is_current)
validate_stack(regs);
- }
if (regs == NULL) {
if (is_current || t->state == TASK_RUNNING) {
@@ -345,6 +279,78 @@ void KBacktraceIterator_next(struct KBacktraceIterator *kbt)
}
EXPORT_SYMBOL(KBacktraceIterator_next);
+static void describe_addr(struct KBacktraceIterator *kbt,
+ unsigned long address,
+ int have_mmap_sem, char *buf, size_t bufsize)
+{
+ struct vm_area_struct *vma;
+ size_t namelen, remaining;
+ unsigned long size, offset, adjust;
+ char *p, *modname;
+ const char *name;
+ int rc;
+
+ /*
+ * Look one byte back for every caller frame (i.e. those that
+ * aren't a new context) so we look up symbol data for the
+ * call itself, not the following instruction, which may be on
+ * a different line (or in a different function).
+ */
+ adjust = !kbt->new_context;
+ address -= adjust;
+
+ if (address >= PAGE_OFFSET) {
+ /* Handle kernel symbols. */
+ BUG_ON(bufsize < KSYM_NAME_LEN);
+ name = kallsyms_lookup(address, &size, &offset,
+ &modname, buf);
+ if (name == NULL) {
+ buf[0] = '\0';
+ return;
+ }
+ namelen = strlen(buf);
+ remaining = (bufsize - 1) - namelen;
+ p = buf + namelen;
+ rc = snprintf(p, remaining, "+%#lx/%#lx ",
+ offset + adjust, size);
+ if (modname && rc < remaining)
+ snprintf(p + rc, remaining - rc, "[%s] ", modname);
+ buf[bufsize-1] = '\0';
+ return;
+ }
+
+ /* If we don't have the mmap_sem, we can't show any more info. */
+ buf[0] = '\0';
+ if (!have_mmap_sem)
+ return;
+
+ /* Find vma info. */
+ vma = find_vma(kbt->task->mm, address);
+ if (vma == NULL || address < vma->vm_start) {
+ snprintf(buf, bufsize, "[unmapped address] ");
+ return;
+ }
+
+ if (vma->vm_file) {
+ char *s;
+ p = d_path(&vma->vm_file->f_path, buf, bufsize);
+ if (IS_ERR(p))
+ p = "?";
+ s = strrchr(p, '/');
+ if (s)
+ p = s+1;
+ } else {
+ p = "anon";
+ }
+
+ /* Generate a string description of the vma info. */
+ namelen = strlen(p);
+ remaining = (bufsize - 1) - namelen;
+ memmove(buf, p, namelen);
+ snprintf(buf + namelen, remaining, "[%lx+%lx] ",
+ vma->vm_start, vma->vm_end - vma->vm_start);
+}
+
/*
* This method wraps the backtracer's more generic support.
* It is only invoked from the architecture-specific code; show_stack()
@@ -353,6 +359,7 @@ EXPORT_SYMBOL(KBacktraceIterator_next);
void tile_show_stack(struct KBacktraceIterator *kbt, int headers)
{
int i;
+ int have_mmap_sem = 0;
if (headers) {
/*
@@ -369,31 +376,16 @@ void tile_show_stack(struct KBacktraceIterator *kbt, int headers)
kbt->verbose = 1;
i = 0;
for (; !KBacktraceIterator_end(kbt); KBacktraceIterator_next(kbt)) {
- char *modname;
- const char *name;
- unsigned long address = kbt->it.pc;
- unsigned long offset, size;
char namebuf[KSYM_NAME_LEN+100];
+ unsigned long address = kbt->it.pc;
- if (address >= PAGE_OFFSET)
- name = kallsyms_lookup(address, &size, &offset,
- &modname, namebuf);
- else
- name = NULL;
-
- if (!name)
- namebuf[0] = '\0';
- else {
- size_t namelen = strlen(namebuf);
- size_t remaining = (sizeof(namebuf) - 1) - namelen;
- char *p = namebuf + namelen;
- int rc = snprintf(p, remaining, "+%#lx/%#lx ",
- offset, size);
- if (modname && rc < remaining)
- snprintf(p + rc, remaining - rc,
- "[%s] ", modname);
- namebuf[sizeof(namebuf)-1] = '\0';
- }
+ /* Try to acquire the mmap_sem as we pass into userspace. */
+ if (address < PAGE_OFFSET && !have_mmap_sem && kbt->task->mm)
+ have_mmap_sem =
+ down_read_trylock(&kbt->task->mm->mmap_sem);
+
+ describe_addr(kbt, address, have_mmap_sem,
+ namebuf, sizeof(namebuf));
pr_err(" frame %d: 0x%lx %s(sp 0x%lx)\n",
i++, address, namebuf, (unsigned long)(kbt->it.sp));
@@ -408,6 +400,8 @@ void tile_show_stack(struct KBacktraceIterator *kbt, int headers)
pr_err("Stack dump stopped; next frame identical to this one\n");
if (headers)
pr_err("Stack dump complete\n");
+ if (have_mmap_sem)
+ up_read(&kbt->task->mm->mmap_sem);
}
EXPORT_SYMBOL(tile_show_stack);
diff --git a/arch/tile/kernel/traps.c b/arch/tile/kernel/traps.c
index 2bb6602..73cff81 100644
--- a/arch/tile/kernel/traps.c
+++ b/arch/tile/kernel/traps.c
@@ -200,7 +200,7 @@ void __kprobes do_trap(struct pt_regs *regs, int fault_num,
{
siginfo_t info = { 0 };
int signo, code;
- unsigned long address;
+ unsigned long address = 0;
bundle_bits instr;
/* Re-enable interrupts. */
@@ -223,6 +223,10 @@ void __kprobes do_trap(struct pt_regs *regs, int fault_num,
}
switch (fault_num) {
+ case INT_MEM_ERROR:
+ signo = SIGBUS;
+ code = BUS_OBJERR;
+ break;
case INT_ILL:
if (copy_from_user(&instr, (void __user *)regs->pc,
sizeof(instr))) {
@@ -289,7 +293,10 @@ void __kprobes do_trap(struct pt_regs *regs, int fault_num,
address = regs->pc;
break;
#ifdef __tilegx__
- case INT_ILL_TRANS:
+ case INT_ILL_TRANS: {
+ /* Avoid a hardware erratum with the return address stack. */
+ fill_ra_stack();
+
signo = SIGSEGV;
code = SEGV_MAPERR;
if (reason & SPR_ILL_TRANS_REASON__I_STREAM_VA_RMASK)
@@ -297,6 +304,7 @@ void __kprobes do_trap(struct pt_regs *regs, int fault_num,
else
address = 0; /* FIXME: GX: single-step for address */
break;
+ }
#endif
default:
panic("Unexpected do_trap interrupt number %d", fault_num);
@@ -308,7 +316,8 @@ void __kprobes do_trap(struct pt_regs *regs, int fault_num,
info.si_addr = (void __user *)address;
if (signo == SIGILL)
info.si_trapno = fault_num;
- trace_unhandled_signal("trap", regs, address, signo);
+ if (signo != SIGTRAP)
+ trace_unhandled_signal("trap", regs, address, signo);
force_sig_info(signo, &info, current);
}
diff --git a/arch/tile/lib/Makefile b/arch/tile/lib/Makefile
index 0c26086..985f598 100644
--- a/arch/tile/lib/Makefile
+++ b/arch/tile/lib/Makefile
@@ -7,6 +7,7 @@ lib-y = cacheflush.o checksum.o cpumask.o delay.o uaccess.o \
strchr_$(BITS).o strlen_$(BITS).o
ifeq ($(CONFIG_TILEGX),y)
+CFLAGS_REMOVE_memcpy_user_64.o = -fno-omit-frame-pointer
lib-y += memcpy_user_64.o
else
lib-y += atomic_32.o atomic_asm_32.o memcpy_tile64.o
diff --git a/arch/tile/lib/cacheflush.c b/arch/tile/lib/cacheflush.c
index 8928aac..db4fb89 100644
--- a/arch/tile/lib/cacheflush.c
+++ b/arch/tile/lib/cacheflush.c
@@ -39,7 +39,21 @@ void finv_buffer_remote(void *buffer, size_t size, int hfh)
{
char *p, *base;
size_t step_size, load_count;
+
+ /*
+ * On TILEPro the striping granularity is a fixed 8KB; on
+ * TILE-Gx it is configurable, and we rely on the fact that
+ * the hypervisor always configures maximum striping, so that
+ * bits 9 and 10 of the PA are part of the stripe function, so
+ * every 512 bytes we hit a striping boundary.
+ *
+ */
+#ifdef __tilegx__
+ const unsigned long STRIPE_WIDTH = 512;
+#else
const unsigned long STRIPE_WIDTH = 8192;
+#endif
+
#ifdef __tilegx__
/*
* On TILE-Gx, we must disable the dstream prefetcher before doing
@@ -74,7 +88,7 @@ void finv_buffer_remote(void *buffer, size_t size, int hfh)
* memory, that one load would be sufficient, but since we may
* be, we also need to back up to the last load issued to
* another memory controller, which would be the point where
- * we crossed an 8KB boundary (the granularity of striping
+ * we crossed a "striping" boundary (the granularity of striping
* across memory controllers). Keep backing up and doing this
* until we are before the beginning of the buffer, or have
* hit all the controllers.
@@ -88,12 +102,22 @@ void finv_buffer_remote(void *buffer, size_t size, int hfh)
* every cache line on a full memory stripe on each
* controller" that we simply do that, to simplify the logic.
*
- * FIXME: See bug 9535 for some issues with this code.
+ * On TILE-Gx the hash-for-home function is much more complex,
+ * with the upshot being we can't readily guarantee we have
+ * hit both entries in the 128-entry AMT that were hit by any
+ * load in the entire range, so we just re-load them all.
+ * With larger buffers, we may want to consider using a hypervisor
+ * trap to issue loads directly to each hash-for-home tile for
+ * each controller (doing it from Linux would trash the TLB).
*/
if (hfh) {
step_size = L2_CACHE_BYTES;
+#ifdef __tilegx__
+ load_count = (size + L2_CACHE_BYTES - 1) / L2_CACHE_BYTES;
+#else
load_count = (STRIPE_WIDTH / L2_CACHE_BYTES) *
(1 << CHIP_LOG_NUM_MSHIMS());
+#endif
} else {
step_size = STRIPE_WIDTH;
load_count = (1 << CHIP_LOG_NUM_MSHIMS());
@@ -109,7 +133,7 @@ void finv_buffer_remote(void *buffer, size_t size, int hfh)
/* Figure out how far back we need to go. */
base = p - (step_size * (load_count - 2));
- if ((long)base < (long)buffer)
+ if ((unsigned long)base < (unsigned long)buffer)
base = buffer;
/*
diff --git a/arch/tile/lib/memcpy_user_64.c b/arch/tile/lib/memcpy_user_64.c
index 4763b3a..37440ca 100644
--- a/arch/tile/lib/memcpy_user_64.c
+++ b/arch/tile/lib/memcpy_user_64.c
@@ -14,7 +14,13 @@
* Do memcpy(), but trap and return "n" when a load or store faults.
*
* Note: this idiom only works when memcpy() compiles to a leaf function.
- * If "sp" is updated during memcpy, the "jrp lr" will be incorrect.
+ * Here leaf function not only means it does not have calls, but also
+ * requires no stack operations (sp, stack frame pointer) and no
+ * use of callee-saved registers, else "jrp lr" will be incorrect since
+ * unwinding stack frame is bypassed. Since memcpy() is not complex so
+ * these conditions are satisfied here, but we need to be careful when
+ * modifying this file. This is not a clean solution but is the best
+ * one so far.
*
* Also note that we are capturing "n" from the containing scope here.
*/
diff --git a/arch/tile/lib/spinlock_common.h b/arch/tile/lib/spinlock_common.h
index c101098..6ac3750 100644
--- a/arch/tile/lib/spinlock_common.h
+++ b/arch/tile/lib/spinlock_common.h
@@ -60,5 +60,5 @@ static void delay_backoff(int iterations)
loops += __insn_crc32_32(stack_pointer, get_cycles_low()) &
(loops - 1);
- relax(1 << exponent);
+ relax(loops);
}
diff --git a/arch/tile/mm/fault.c b/arch/tile/mm/fault.c
index cba30e9..22e58f5 100644
--- a/arch/tile/mm/fault.c
+++ b/arch/tile/mm/fault.c
@@ -130,7 +130,7 @@ static inline pmd_t *vmalloc_sync_one(pgd_t *pgd, unsigned long address)
}
/*
- * Handle a fault on the vmalloc or module mapping area
+ * Handle a fault on the vmalloc area.
*/
static inline int vmalloc_fault(pgd_t *pgd, unsigned long address)
{
@@ -203,9 +203,14 @@ static pgd_t *get_current_pgd(void)
* interrupt or a critical region, and must do as little as possible.
* Similarly, we can't use atomic ops here, since we may be handling a
* fault caused by an atomic op access.
+ *
+ * If we find a migrating PTE while we're in an NMI context, and we're
+ * at a PC that has a registered exception handler, we don't wait,
+ * since this thread may (e.g.) have been interrupted while migrating
+ * its own stack, which would then cause us to self-deadlock.
*/
static int handle_migrating_pte(pgd_t *pgd, int fault_num,
- unsigned long address,
+ unsigned long address, unsigned long pc,
int is_kernel_mode, int write)
{
pud_t *pud;
@@ -227,6 +232,8 @@ static int handle_migrating_pte(pgd_t *pgd, int fault_num,
pte_offset_kernel(pmd, address);
pteval = *pte;
if (pte_migrating(pteval)) {
+ if (in_nmi() && search_exception_tables(pc))
+ return 0;
wait_for_migration(pte);
return 1;
}
@@ -300,7 +307,7 @@ static int handle_page_fault(struct pt_regs *regs,
* rather than trying to patch up the existing PTE.
*/
pgd = get_current_pgd();
- if (handle_migrating_pte(pgd, fault_num, address,
+ if (handle_migrating_pte(pgd, fault_num, address, regs->pc,
is_kernel_mode, write))
return 1;
@@ -335,9 +342,12 @@ static int handle_page_fault(struct pt_regs *regs,
/*
* If we're trying to touch user-space addresses, we must
* be either at PL0, or else with interrupts enabled in the
- * kernel, so either way we can re-enable interrupts here.
+ * kernel, so either way we can re-enable interrupts here
+ * unless we are doing atomic access to user space with
+ * interrupts disabled.
*/
- local_irq_enable();
+ if (!(regs->flags & PT_FLAGS_DISABLE_IRQ))
+ local_irq_enable();
mm = tsk->mm;
@@ -665,7 +675,7 @@ struct intvec_state do_page_fault_ics(struct pt_regs *regs, int fault_num,
*/
if (fault_num == INT_DTLB_ACCESS)
write = 1;
- if (handle_migrating_pte(pgd, fault_num, address, 1, write))
+ if (handle_migrating_pte(pgd, fault_num, address, pc, 1, write))
return state;
/* Return zero so that we continue on with normal fault handling. */
diff --git a/arch/tile/mm/homecache.c b/arch/tile/mm/homecache.c
index 1cc6ae4..499f737 100644
--- a/arch/tile/mm/homecache.c
+++ b/arch/tile/mm/homecache.c
@@ -394,6 +394,7 @@ int page_home(struct page *page)
return pte_to_home(*virt_to_pte(NULL, kva));
}
}
+EXPORT_SYMBOL(page_home);
void homecache_change_page_home(struct page *page, int order, int home)
{
diff --git a/arch/tile/mm/init.c b/arch/tile/mm/init.c
index 830c490..6a9d20d 100644
--- a/arch/tile/mm/init.c
+++ b/arch/tile/mm/init.c
@@ -254,11 +254,6 @@ static pgprot_t __init init_pgprot(ulong address)
return construct_pgprot(PAGE_KERNEL_RO, PAGE_HOME_IMMUTABLE);
}
- /* As a performance optimization, keep the boot init stack here. */
- if (address >= (ulong)&init_thread_union &&
- address < (ulong)&init_thread_union + THREAD_SIZE)
- return construct_pgprot(PAGE_KERNEL, smp_processor_id());
-
#ifndef __tilegx__
#if !ATOMIC_LOCKS_FOUND_VIA_TABLE()
/* Force the atomic_locks[] array page to be hash-for-home. */
@@ -557,6 +552,7 @@ static void __init kernel_physical_mapping_init(pgd_t *pgd_base)
address = MEM_SV_INTRPT;
pmd = get_pmd(pgtables, address);
+ pfn = 0; /* code starts at PA 0 */
if (ktext_small) {
/* Allocate an L2 PTE for the kernel text */
int cpu = 0;
@@ -579,10 +575,15 @@ static void __init kernel_physical_mapping_init(pgd_t *pgd_base)
}
BUG_ON(address != (unsigned long)_stext);
- pfn = 0; /* code starts at PA 0 */
- pte = alloc_pte();
- for (pte_ofs = 0; address < (unsigned long)_einittext;
- pfn++, pte_ofs++, address += PAGE_SIZE) {
+ pte = NULL;
+ for (; address < (unsigned long)_einittext;
+ pfn++, address += PAGE_SIZE) {
+ pte_ofs = pte_index(address);
+ if (pte_ofs == 0) {
+ if (pte)
+ assign_pte(pmd++, pte);
+ pte = alloc_pte();
+ }
if (!ktext_local) {
prot = set_remote_cache_cpu(prot, cpu);
cpu = cpumask_next(cpu, &ktext_mask);
@@ -591,7 +592,8 @@ static void __init kernel_physical_mapping_init(pgd_t *pgd_base)
}
pte[pte_ofs] = pfn_pte(pfn, prot);
}
- assign_pte(pmd, pte);
+ if (pte)
+ assign_pte(pmd, pte);
} else {
pte_t pteval = pfn_pte(0, PAGE_KERNEL_EXEC);
pteval = pte_mkhuge(pteval);
@@ -614,7 +616,9 @@ static void __init kernel_physical_mapping_init(pgd_t *pgd_base)
else
pteval = hv_pte_set_mode(pteval,
HV_PTE_MODE_CACHE_NO_L3);
- *(pte_t *)pmd = pteval;
+ for (; address < (unsigned long)_einittext;
+ pfn += PFN_DOWN(HPAGE_SIZE), address += HPAGE_SIZE)
+ *(pte_t *)(pmd++) = pfn_pte(pfn, pteval);
}
/* Set swapper_pgprot here so it is flushed to memory right away. */
diff --git a/arch/tile/mm/pgtable.c b/arch/tile/mm/pgtable.c
index 8730369..2410aa8 100644
--- a/arch/tile/mm/pgtable.c
+++ b/arch/tile/mm/pgtable.c
@@ -177,14 +177,10 @@ void shatter_huge_page(unsigned long addr)
if (!pmd_huge_page(*pmd))
return;
- /*
- * Grab the pgd_lock, since we may need it to walk the pgd_list,
- * and since we need some kind of lock here to avoid races.
- */
- spin_lock_irqsave(&pgd_lock, flags);
+ spin_lock_irqsave(&init_mm.page_table_lock, flags);
if (!pmd_huge_page(*pmd)) {
/* Lost the race to convert the huge page. */
- spin_unlock_irqrestore(&pgd_lock, flags);
+ spin_unlock_irqrestore(&init_mm.page_table_lock, flags);
return;
}
@@ -194,6 +190,7 @@ void shatter_huge_page(unsigned long addr)
#ifdef __PAGETABLE_PMD_FOLDED
/* Walk every pgd on the system and update the pmd there. */
+ spin_lock(&pgd_lock);
list_for_each(pos, &pgd_list) {
pmd_t *copy_pmd;
pgd = list_to_pgd(pos) + pgd_index(addr);
@@ -201,6 +198,7 @@ void shatter_huge_page(unsigned long addr)
copy_pmd = pmd_offset(pud, addr);
__set_pmd(copy_pmd, *pmd);
}
+ spin_unlock(&pgd_lock);
#endif
/* Tell every cpu to notice the change. */
@@ -208,7 +206,7 @@ void shatter_huge_page(unsigned long addr)
cpu_possible_mask, NULL, 0);
/* Hold the lock until the TLB flush is finished to avoid races. */
- spin_unlock_irqrestore(&pgd_lock, flags);
+ spin_unlock_irqrestore(&init_mm.page_table_lock, flags);
}
/*
@@ -217,9 +215,13 @@ void shatter_huge_page(unsigned long addr)
* against pageattr.c; it is the unique case in which a valid change
* of kernel pagetables can't be lazily synchronized by vmalloc faults.
* vmalloc faults work because attached pagetables are never freed.
- * The locking scheme was chosen on the basis of manfred's
- * recommendations and having no core impact whatsoever.
- * -- wli
+ *
+ * The lock is always taken with interrupts disabled, unlike on x86
+ * and other platforms, because we need to take the lock in
+ * shatter_huge_page(), which may be called from an interrupt context.
+ * We are not at risk from the tlbflush IPI deadlock that was seen on
+ * x86, since we use the flush_remote() API to have the hypervisor do
+ * the TLB flushes regardless of irq disabling.
*/
DEFINE_SPINLOCK(pgd_lock);
LIST_HEAD(pgd_list);
@@ -469,10 +471,18 @@ void __set_pte(pte_t *ptep, pte_t pte)
void set_pte(pte_t *ptep, pte_t pte)
{
- struct page *page = pfn_to_page(pte_pfn(pte));
-
- /* Update the home of a PTE if necessary */
- pte = pte_set_home(pte, page_home(page));
+ if (pte_present(pte) &&
+ (!CHIP_HAS_MMIO() || hv_pte_get_mode(pte) != HV_PTE_MODE_MMIO)) {
+ /* The PTE actually references physical memory. */
+ unsigned long pfn = pte_pfn(pte);
+ if (pfn_valid(pfn)) {
+ /* Update the home of the PTE from the struct page. */
+ pte = pte_set_home(pte, page_home(pfn_to_page(pfn)));
+ } else if (hv_pte_get_mode(pte) == 0) {
+ /* remap_pfn_range(), etc, must supply PTE mode. */
+ panic("set_pte(): out-of-range PFN and mode 0\n");
+ }
+ }
__set_pte(ptep, pte);
}
diff --git a/arch/um/drivers/cow.h b/arch/um/drivers/cow.h
index dc36b22..6673508 100644
--- a/arch/um/drivers/cow.h
+++ b/arch/um/drivers/cow.h
@@ -3,41 +3,6 @@
#include <asm/types.h>
-#if defined(__KERNEL__)
-
-# include <asm/byteorder.h>
-
-# if defined(__BIG_ENDIAN)
-# define ntohll(x) (x)
-# define htonll(x) (x)
-# elif defined(__LITTLE_ENDIAN)
-# define ntohll(x) be64_to_cpu(x)
-# define htonll(x) cpu_to_be64(x)
-# else
-# error "Could not determine byte order"
-# endif
-
-#else
-/* For the definition of ntohl, htonl and __BYTE_ORDER */
-#include <endian.h>
-#include <netinet/in.h>
-#if defined(__BYTE_ORDER)
-
-# if __BYTE_ORDER == __BIG_ENDIAN
-# define ntohll(x) (x)
-# define htonll(x) (x)
-# elif __BYTE_ORDER == __LITTLE_ENDIAN
-# define ntohll(x) bswap_64(x)
-# define htonll(x) bswap_64(x)
-# else
-# error "Could not determine byte order: __BYTE_ORDER uncorrectly defined"
-# endif
-
-#else /* ! defined(__BYTE_ORDER) */
-# error "Could not determine byte order: __BYTE_ORDER not defined"
-#endif
-#endif /* ! defined(__KERNEL__) */
-
extern int init_cow_file(int fd, char *cow_file, char *backing_file,
int sectorsize, int alignment, int *bitmap_offset_out,
unsigned long *bitmap_len_out, int *data_offset_out);
diff --git a/arch/um/drivers/cow_user.c b/arch/um/drivers/cow_user.c
index 9cbb426..0ee9cc6 100644
--- a/arch/um/drivers/cow_user.c
+++ b/arch/um/drivers/cow_user.c
@@ -8,11 +8,10 @@
* that.
*/
#include <unistd.h>
-#include <byteswap.h>
#include <errno.h>
#include <string.h>
#include <arpa/inet.h>
-#include <asm/types.h>
+#include <endian.h>
#include "cow.h"
#include "cow_sys.h"
@@ -214,8 +213,8 @@ int write_cow_header(char *cow_file, int fd, char *backing_file,
"header\n");
goto out;
}
- header->magic = htonl(COW_MAGIC);
- header->version = htonl(COW_VERSION);
+ header->magic = htobe32(COW_MAGIC);
+ header->version = htobe32(COW_VERSION);
err = -EINVAL;
if (strlen(backing_file) > sizeof(header->backing_file) - 1) {
@@ -246,10 +245,10 @@ int write_cow_header(char *cow_file, int fd, char *backing_file,
goto out_free;
}
- header->mtime = htonl(modtime);
- header->size = htonll(*size);
- header->sectorsize = htonl(sectorsize);
- header->alignment = htonl(alignment);
+ header->mtime = htobe32(modtime);
+ header->size = htobe64(*size);
+ header->sectorsize = htobe32(sectorsize);
+ header->alignment = htobe32(alignment);
header->cow_format = COW_BITMAP;
err = cow_write_file(fd, header, sizeof(*header));
@@ -301,8 +300,8 @@ int read_cow_header(int (*reader)(__u64, char *, int, void *), void *arg,
magic = header->v1.magic;
if (magic == COW_MAGIC)
version = header->v1.version;
- else if (magic == ntohl(COW_MAGIC))
- version = ntohl(header->v1.version);
+ else if (magic == be32toh(COW_MAGIC))
+ version = be32toh(header->v1.version);
/* No error printed because the non-COW case comes through here */
else goto out;
@@ -327,9 +326,9 @@ int read_cow_header(int (*reader)(__u64, char *, int, void *), void *arg,
"header\n");
goto out;
}
- *mtime_out = ntohl(header->v2.mtime);
- *size_out = ntohll(header->v2.size);
- *sectorsize_out = ntohl(header->v2.sectorsize);
+ *mtime_out = be32toh(header->v2.mtime);
+ *size_out = be64toh(header->v2.size);
+ *sectorsize_out = be32toh(header->v2.sectorsize);
*bitmap_offset_out = sizeof(header->v2);
*align_out = *sectorsize_out;
file = header->v2.backing_file;
@@ -341,10 +340,10 @@ int read_cow_header(int (*reader)(__u64, char *, int, void *), void *arg,
"header\n");
goto out;
}
- *mtime_out = ntohl(header->v3.mtime);
- *size_out = ntohll(header->v3.size);
- *sectorsize_out = ntohl(header->v3.sectorsize);
- *align_out = ntohl(header->v3.alignment);
+ *mtime_out = be32toh(header->v3.mtime);
+ *size_out = be64toh(header->v3.size);
+ *sectorsize_out = be32toh(header->v3.sectorsize);
+ *align_out = be32toh(header->v3.alignment);
if (*align_out == 0) {
cow_printf("read_cow_header - invalid COW header, "
"align == 0\n");
@@ -366,16 +365,16 @@ int read_cow_header(int (*reader)(__u64, char *, int, void *), void *arg,
* this was used until Dec2005 - 64bits are needed to represent
* 2038+. I.e. we can safely do this truncating cast.
*
- * Additionally, we must use ntohl() instead of ntohll(), since
+ * Additionally, we must use be32toh() instead of be64toh(), since
* the program used to use the former (tested - I got mtime
* mismatch "0 vs whatever").
*
* Ever heard about bug-to-bug-compatibility ? ;-) */
- *mtime_out = (time32_t) ntohl(header->v3_b.mtime);
+ *mtime_out = (time32_t) be32toh(header->v3_b.mtime);
- *size_out = ntohll(header->v3_b.size);
- *sectorsize_out = ntohl(header->v3_b.sectorsize);
- *align_out = ntohl(header->v3_b.alignment);
+ *size_out = be64toh(header->v3_b.size);
+ *sectorsize_out = be32toh(header->v3_b.sectorsize);
+ *align_out = be32toh(header->v3_b.alignment);
if (*align_out == 0) {
cow_printf("read_cow_header - invalid COW header, "
"align == 0\n");
diff --git a/arch/um/drivers/mconsole_kern.c b/arch/um/drivers/mconsole_kern.c
index e672bd6..43b39d6 100644
--- a/arch/um/drivers/mconsole_kern.c
+++ b/arch/um/drivers/mconsole_kern.c
@@ -22,6 +22,7 @@
#include <linux/workqueue.h>
#include <linux/mutex.h>
#include <asm/uaccess.h>
+#include <asm/switch_to.h>
#include "init.h"
#include "irq_kern.h"
diff --git a/arch/um/include/asm/Kbuild b/arch/um/include/asm/Kbuild
index 8419f5c..fff2435 100644
--- a/arch/um/include/asm/Kbuild
+++ b/arch/um/include/asm/Kbuild
@@ -1,3 +1,4 @@
generic-y += bug.h cputime.h device.h emergency-restart.h futex.h hardirq.h
generic-y += hw_irq.h irq_regs.h kdebug.h percpu.h sections.h topology.h xor.h
-generic-y += ftrace.h pci.h io.h param.h delay.h mutex.h current.h
+generic-y += ftrace.h pci.h io.h param.h delay.h mutex.h current.h exec.h
+generic-y += switch_to.h
diff --git a/arch/um/kernel/Makefile b/arch/um/kernel/Makefile
index 492bc4c..65a1c3d 100644
--- a/arch/um/kernel/Makefile
+++ b/arch/um/kernel/Makefile
@@ -3,9 +3,10 @@
# Licensed under the GPL
#
-CPPFLAGS_vmlinux.lds := -DSTART=$(LDS_START) \
- -DELF_ARCH=$(LDS_ELF_ARCH) \
- -DELF_FORMAT=$(LDS_ELF_FORMAT)
+CPPFLAGS_vmlinux.lds := -DSTART=$(LDS_START) \
+ -DELF_ARCH=$(LDS_ELF_ARCH) \
+ -DELF_FORMAT=$(LDS_ELF_FORMAT) \
+ $(LDS_EXTRA)
extra-y := vmlinux.lds
clean-files :=
diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c
index f386d04..2b73ded 100644
--- a/arch/um/kernel/process.c
+++ b/arch/um/kernel/process.c
@@ -88,11 +88,8 @@ static inline void set_current(struct task_struct *task)
extern void arch_switch_to(struct task_struct *to);
-void *_switch_to(void *prev, void *next, void *last)
+void *__switch_to(struct task_struct *from, struct task_struct *to)
{
- struct task_struct *from = prev;
- struct task_struct *to = next;
-
to->thread.prev_sched = from;
set_current(to);
@@ -111,7 +108,6 @@ void *_switch_to(void *prev, void *next, void *last)
} while (current->thread.saved_task);
return current->thread.prev_sched;
-
}
void interrupt_end(void)
diff --git a/arch/um/kernel/skas/mmu.c b/arch/um/kernel/skas/mmu.c
index 4947b31..0a49ef0 100644
--- a/arch/um/kernel/skas/mmu.c
+++ b/arch/um/kernel/skas/mmu.c
@@ -103,7 +103,6 @@ int init_new_context(struct task_struct *task, struct mm_struct *mm)
void uml_setup_stubs(struct mm_struct *mm)
{
- struct page **pages;
int err, ret;
if (!skas_needs_stub)
diff --git a/arch/x86/Makefile.um b/arch/x86/Makefile.um
index 4be406a..36b62bc 100644
--- a/arch/x86/Makefile.um
+++ b/arch/x86/Makefile.um
@@ -14,6 +14,9 @@ LINK-y += $(call cc-option,-m32)
export LDFLAGS
+LDS_EXTRA := -Ui386
+export LDS_EXTRA
+
# First of all, tune CFLAGS for the specific CPU. This actually sets cflags-y.
include $(srctree)/arch/x86/Makefile_32.cpu
diff --git a/arch/x86/include/asm/uaccess.h b/arch/x86/include/asm/uaccess.h
index 8be5f54..e054459 100644
--- a/arch/x86/include/asm/uaccess.h
+++ b/arch/x86/include/asm/uaccess.h
@@ -557,6 +557,8 @@ struct __large_struct { unsigned long buf[100]; };
extern unsigned long
copy_from_user_nmi(void *to, const void __user *from, unsigned long n);
+extern __must_check long
+strncpy_from_user(char *dst, const char __user *src, long count);
/*
* movsl can be slow when source and dest are not both 8-byte aligned
diff --git a/arch/x86/include/asm/uaccess_32.h b/arch/x86/include/asm/uaccess_32.h
index 566e803..8084bc73 100644
--- a/arch/x86/include/asm/uaccess_32.h
+++ b/arch/x86/include/asm/uaccess_32.h
@@ -213,11 +213,6 @@ static inline unsigned long __must_check copy_from_user(void *to,
return n;
}
-long __must_check strncpy_from_user(char *dst, const char __user *src,
- long count);
-long __must_check __strncpy_from_user(char *dst,
- const char __user *src, long count);
-
/**
* strlen_user: - Get the size of a string in user space.
* @str: The string to measure.
diff --git a/arch/x86/include/asm/uaccess_64.h b/arch/x86/include/asm/uaccess_64.h
index 1c66d30..fcd4b6f 100644
--- a/arch/x86/include/asm/uaccess_64.h
+++ b/arch/x86/include/asm/uaccess_64.h
@@ -208,10 +208,6 @@ int __copy_in_user(void __user *dst, const void __user *src, unsigned size)
}
}
-__must_check long
-strncpy_from_user(char *dst, const char __user *src, long count);
-__must_check long
-__strncpy_from_user(char *dst, const char __user *src, long count);
__must_check long strnlen_user(const char __user *str, long n);
__must_check long __strnlen_user(const char __user *str, long n);
__must_check long strlen_user(const char __user *str);
diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c
index 694d801..b8ba6e4 100644
--- a/arch/x86/kernel/kvm.c
+++ b/arch/x86/kernel/kvm.c
@@ -38,6 +38,7 @@
#include <asm/traps.h>
#include <asm/desc.h>
#include <asm/tlbflush.h>
+#include <asm/idle.h>
static int kvmapf = 1;
@@ -253,7 +254,10 @@ do_async_page_fault(struct pt_regs *regs, unsigned long error_code)
kvm_async_pf_task_wait((u32)read_cr2());
break;
case KVM_PV_REASON_PAGE_READY:
+ rcu_irq_enter();
+ exit_idle();
kvm_async_pf_task_wake((u32)read_cr2());
+ rcu_irq_exit();
break;
}
}
diff --git a/arch/x86/kvm/pmu.c b/arch/x86/kvm/pmu.c
index a73f0c1..173df38 100644
--- a/arch/x86/kvm/pmu.c
+++ b/arch/x86/kvm/pmu.c
@@ -369,7 +369,7 @@ int kvm_pmu_set_msr(struct kvm_vcpu *vcpu, u32 index, u64 data)
case MSR_CORE_PERF_FIXED_CTR_CTRL:
if (pmu->fixed_ctr_ctrl == data)
return 0;
- if (!(data & 0xfffffffffffff444)) {
+ if (!(data & 0xfffffffffffff444ull)) {
reprogram_fixed_counters(pmu, data);
return 0;
}
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 280751c..ad85adf 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -3906,7 +3906,9 @@ static int vmx_vcpu_reset(struct kvm_vcpu *vcpu)
vmcs_write16(VIRTUAL_PROCESSOR_ID, vmx->vpid);
vmx->vcpu.arch.cr0 = X86_CR0_NW | X86_CR0_CD | X86_CR0_ET;
+ vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
vmx_set_cr0(&vmx->vcpu, kvm_read_cr0(vcpu)); /* enter rmode */
+ srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
vmx_set_cr4(&vmx->vcpu, 0);
vmx_set_efer(&vmx->vcpu, 0);
vmx_fpu_activate(&vmx->vcpu);
diff --git a/arch/x86/lib/usercopy.c b/arch/x86/lib/usercopy.c
index 97be9cb..57252c9 100644
--- a/arch/x86/lib/usercopy.c
+++ b/arch/x86/lib/usercopy.c
@@ -7,6 +7,8 @@
#include <linux/highmem.h>
#include <linux/module.h>
+#include <asm/word-at-a-time.h>
+
/*
* best effort, GUP based copy_from_user() that is NMI-safe
*/
@@ -41,3 +43,104 @@ copy_from_user_nmi(void *to, const void __user *from, unsigned long n)
return len;
}
EXPORT_SYMBOL_GPL(copy_from_user_nmi);
+
+static inline unsigned long count_bytes(unsigned long mask)
+{
+ mask = (mask - 1) & ~mask;
+ mask >>= 7;
+ return count_masked_bytes(mask);
+}
+
+/*
+ * Do a strncpy, return length of string without final '\0'.
+ * 'count' is the user-supplied count (return 'count' if we
+ * hit it), 'max' is the address space maximum (and we return
+ * -EFAULT if we hit it).
+ */
+static inline long do_strncpy_from_user(char *dst, const char __user *src, long count, long max)
+{
+ long res = 0;
+
+ /*
+ * Truncate 'max' to the user-specified limit, so that
+ * we only have one limit we need to check in the loop
+ */
+ if (max > count)
+ max = count;
+
+ while (max >= sizeof(unsigned long)) {
+ unsigned long c;
+
+ /* Fall back to byte-at-a-time if we get a page fault */
+ if (unlikely(__get_user(c,(unsigned long __user *)(src+res))))
+ break;
+ /* This can write a few bytes past the NUL character, but that's ok */
+ *(unsigned long *)(dst+res) = c;
+ c = has_zero(c);
+ if (c)
+ return res + count_bytes(c);
+ res += sizeof(unsigned long);
+ max -= sizeof(unsigned long);
+ }
+
+ while (max) {
+ char c;
+
+ if (unlikely(__get_user(c,src+res)))
+ return -EFAULT;
+ dst[res] = c;
+ if (!c)
+ return res;
+ res++;
+ max--;
+ }
+
+ /*
+ * Uhhuh. We hit 'max'. But was that the user-specified maximum
+ * too? If so, that's ok - we got as much as the user asked for.
+ */
+ if (res >= count)
+ return count;
+
+ /*
+ * Nope: we hit the address space limit, and we still had more
+ * characters the caller would have wanted. That's an EFAULT.
+ */
+ return -EFAULT;
+}
+
+/**
+ * strncpy_from_user: - Copy a NUL terminated string from userspace.
+ * @dst: Destination address, in kernel space. This buffer must be at
+ * least @count bytes long.
+ * @src: Source address, in user space.
+ * @count: Maximum number of bytes to copy, including the trailing NUL.
+ *
+ * Copies a NUL-terminated string from userspace to kernel space.
+ *
+ * On success, returns the length of the string (not including the trailing
+ * NUL).
+ *
+ * If access to userspace fails, returns -EFAULT (some data may have been
+ * copied).
+ *
+ * If @count is smaller than the length of the string, copies @count bytes
+ * and returns @count.
+ */
+long
+strncpy_from_user(char *dst, const char __user *src, long count)
+{
+ unsigned long max_addr, src_addr;
+
+ if (unlikely(count <= 0))
+ return 0;
+
+ max_addr = current_thread_info()->addr_limit.seg;
+ src_addr = (unsigned long)src;
+ if (likely(src_addr < max_addr)) {
+ unsigned long max = max_addr - src_addr;
+ return do_strncpy_from_user(dst, src, count, max);
+ }
+ return -EFAULT;
+}
+EXPORT_SYMBOL(strncpy_from_user);
diff --git a/arch/x86/lib/usercopy_32.c b/arch/x86/lib/usercopy_32.c
index d9b094c..ef2a6a5 100644
--- a/arch/x86/lib/usercopy_32.c
+++ b/arch/x86/lib/usercopy_32.c
@@ -33,93 +33,6 @@ static inline int __movsl_is_ok(unsigned long a1, unsigned long a2, unsigned lon
__movsl_is_ok((unsigned long)(a1), (unsigned long)(a2), (n))
/*
- * Copy a null terminated string from userspace.
- */
-
-#define __do_strncpy_from_user(dst, src, count, res) \
-do { \
- int __d0, __d1, __d2; \
- might_fault(); \
- __asm__ __volatile__( \
- " testl %1,%1\n" \
- " jz 2f\n" \
- "0: lodsb\n" \
- " stosb\n" \
- " testb %%al,%%al\n" \
- " jz 1f\n" \
- " decl %1\n" \
- " jnz 0b\n" \
- "1: subl %1,%0\n" \
- "2:\n" \
- ".section .fixup,\"ax\"\n" \
- "3: movl %5,%0\n" \
- " jmp 2b\n" \
- ".previous\n" \
- _ASM_EXTABLE(0b,3b) \
- : "=&d"(res), "=&c"(count), "=&a" (__d0), "=&S" (__d1), \
- "=&D" (__d2) \
- : "i"(-EFAULT), "0"(count), "1"(count), "3"(src), "4"(dst) \
- : "memory"); \
-} while (0)
-
-/**
- * __strncpy_from_user: - Copy a NUL terminated string from userspace, with less checking.
- * @dst: Destination address, in kernel space. This buffer must be at
- * least @count bytes long.
- * @src: Source address, in user space.
- * @count: Maximum number of bytes to copy, including the trailing NUL.
- *
- * Copies a NUL-terminated string from userspace to kernel space.
- * Caller must check the specified block with access_ok() before calling
- * this function.
- *
- * On success, returns the length of the string (not including the trailing
- * NUL).
- *
- * If access to userspace fails, returns -EFAULT (some data may have been
- * copied).
- *
- * If @count is smaller than the length of the string, copies @count bytes
- * and returns @count.
- */
-long
-__strncpy_from_user(char *dst, const char __user *src, long count)
-{
- long res;
- __do_strncpy_from_user(dst, src, count, res);
- return res;
-}
-EXPORT_SYMBOL(__strncpy_from_user);
-
-/**
- * strncpy_from_user: - Copy a NUL terminated string from userspace.
- * @dst: Destination address, in kernel space. This buffer must be at
- * least @count bytes long.
- * @src: Source address, in user space.
- * @count: Maximum number of bytes to copy, including the trailing NUL.
- *
- * Copies a NUL-terminated string from userspace to kernel space.
- *
- * On success, returns the length of the string (not including the trailing
- * NUL).
- *
- * If access to userspace fails, returns -EFAULT (some data may have been
- * copied).
- *
- * If @count is smaller than the length of the string, copies @count bytes
- * and returns @count.
- */
-long
-strncpy_from_user(char *dst, const char __user *src, long count)
-{
- long res = -EFAULT;
- if (access_ok(VERIFY_READ, src, 1))
- __do_strncpy_from_user(dst, src, count, res);
- return res;
-}
-EXPORT_SYMBOL(strncpy_from_user);
-
-/*
* Zero Userspace
*/
diff --git a/arch/x86/lib/usercopy_64.c b/arch/x86/lib/usercopy_64.c
index b7c2849..0d0326f 100644
--- a/arch/x86/lib/usercopy_64.c
+++ b/arch/x86/lib/usercopy_64.c
@@ -9,55 +9,6 @@
#include <asm/uaccess.h>
/*
- * Copy a null terminated string from userspace.
- */
-
-#define __do_strncpy_from_user(dst,src,count,res) \
-do { \
- long __d0, __d1, __d2; \
- might_fault(); \
- __asm__ __volatile__( \
- " testq %1,%1\n" \
- " jz 2f\n" \
- "0: lodsb\n" \
- " stosb\n" \
- " testb %%al,%%al\n" \
- " jz 1f\n" \
- " decq %1\n" \
- " jnz 0b\n" \
- "1: subq %1,%0\n" \
- "2:\n" \
- ".section .fixup,\"ax\"\n" \
- "3: movq %5,%0\n" \
- " jmp 2b\n" \
- ".previous\n" \
- _ASM_EXTABLE(0b,3b) \
- : "=&r"(res), "=&c"(count), "=&a" (__d0), "=&S" (__d1), \
- "=&D" (__d2) \
- : "i"(-EFAULT), "0"(count), "1"(count), "3"(src), "4"(dst) \
- : "memory"); \
-} while (0)
-
-long
-__strncpy_from_user(char *dst, const char __user *src, long count)
-{
- long res;
- __do_strncpy_from_user(dst, src, count, res);
- return res;
-}
-EXPORT_SYMBOL(__strncpy_from_user);
-
-long
-strncpy_from_user(char *dst, const char __user *src, long count)
-{
- long res = -EFAULT;
- if (access_ok(VERIFY_READ, src, 1))
- return __strncpy_from_user(dst, src, count);
- return res;
-}
-EXPORT_SYMBOL(strncpy_from_user);
-
-/*
* Zero Userspace
*/
diff --git a/arch/x86/um/asm/barrier.h b/arch/x86/um/asm/barrier.h
new file mode 100644
index 0000000..7d01b8c
--- /dev/null
+++ b/arch/x86/um/asm/barrier.h
@@ -0,0 +1,75 @@
+#ifndef _ASM_UM_BARRIER_H_
+#define _ASM_UM_BARRIER_H_
+
+#include <asm/asm.h>
+#include <asm/segment.h>
+#include <asm/cpufeature.h>
+#include <asm/cmpxchg.h>
+#include <asm/nops.h>
+
+#include <linux/kernel.h>
+#include <linux/irqflags.h>
+
+/*
+ * Force strict CPU ordering.
+ * And yes, this is required on UP too when we're talking
+ * to devices.
+ */
+#ifdef CONFIG_X86_32
+
+#define mb() alternative("lock; addl $0,0(%%esp)", "mfence", X86_FEATURE_XMM2)
+#define rmb() alternative("lock; addl $0,0(%%esp)", "lfence", X86_FEATURE_XMM2)
+#define wmb() alternative("lock; addl $0,0(%%esp)", "sfence", X86_FEATURE_XMM)
+
+#else /* CONFIG_X86_32 */
+
+#define mb() asm volatile("mfence" : : : "memory")
+#define rmb() asm volatile("lfence" : : : "memory")
+#define wmb() asm volatile("sfence" : : : "memory")
+
+#endif /* CONFIG_X86_32 */
+
+#define read_barrier_depends() do { } while (0)
+
+#ifdef CONFIG_SMP
+
+#define smp_mb() mb()
+#ifdef CONFIG_X86_PPRO_FENCE
+#define smp_rmb() rmb()
+#else /* CONFIG_X86_PPRO_FENCE */
+#define smp_rmb() barrier()
+#endif /* CONFIG_X86_PPRO_FENCE */
+
+#ifdef CONFIG_X86_OOSTORE
+#define smp_wmb() wmb()
+#else /* CONFIG_X86_OOSTORE */
+#define smp_wmb() barrier()
+#endif /* CONFIG_X86_OOSTORE */
+
+#define smp_read_barrier_depends() read_barrier_depends()
+#define set_mb(var, value) do { (void)xchg(&var, value); } while (0)
+
+#else /* CONFIG_SMP */
+
+#define smp_mb() barrier()
+#define smp_rmb() barrier()
+#define smp_wmb() barrier()
+#define smp_read_barrier_depends() do { } while (0)
+#define set_mb(var, value) do { var = value; barrier(); } while (0)
+
+#endif /* CONFIG_SMP */
+
+/*
+ * Stop RDTSC speculation. This is needed when you need to use RDTSC
+ * (or get_cycles or vread that possibly accesses the TSC) in a defined
+ * code region.
+ *
+ * (Could use an alternative three way for this if there was one.)
+ */
+static inline void rdtsc_barrier(void)
+{
+ alternative(ASM_NOP3, "mfence", X86_FEATURE_MFENCE_RDTSC);
+ alternative(ASM_NOP3, "lfence", X86_FEATURE_LFENCE_RDTSC);
+}
+
+#endif
diff --git a/arch/x86/um/asm/system.h b/arch/x86/um/asm/system.h
deleted file mode 100644
index a459fd9..0000000
--- a/arch/x86/um/asm/system.h
+++ /dev/null
@@ -1,135 +0,0 @@
-#ifndef _ASM_X86_SYSTEM_H_
-#define _ASM_X86_SYSTEM_H_
-
-#include <asm/asm.h>
-#include <asm/segment.h>
-#include <asm/cpufeature.h>
-#include <asm/cmpxchg.h>
-#include <asm/nops.h>
-
-#include <linux/kernel.h>
-#include <linux/irqflags.h>
-
-/* entries in ARCH_DLINFO: */
-#ifdef CONFIG_IA32_EMULATION
-# define AT_VECTOR_SIZE_ARCH 2
-#else
-# define AT_VECTOR_SIZE_ARCH 1
-#endif
-
-extern unsigned long arch_align_stack(unsigned long sp);
-
-void default_idle(void);
-
-/*
- * Force strict CPU ordering.
- * And yes, this is required on UP too when we're talking
- * to devices.
- */
-#ifdef CONFIG_X86_32
-/*
- * Some non-Intel clones support out of order store. wmb() ceases to be a
- * nop for these.
- */
-#define mb() alternative("lock; addl $0,0(%%esp)", "mfence", X86_FEATURE_XMM2)
-#define rmb() alternative("lock; addl $0,0(%%esp)", "lfence", X86_FEATURE_XMM2)
-#define wmb() alternative("lock; addl $0,0(%%esp)", "sfence", X86_FEATURE_XMM)
-#else
-#define mb() asm volatile("mfence":::"memory")
-#define rmb() asm volatile("lfence":::"memory")
-#define wmb() asm volatile("sfence" ::: "memory")
-#endif
-
-/**
- * read_barrier_depends - Flush all pending reads that subsequents reads
- * depend on.
- *
- * No data-dependent reads from memory-like regions are ever reordered
- * over this barrier. All reads preceding this primitive are guaranteed
- * to access memory (but not necessarily other CPUs' caches) before any
- * reads following this primitive that depend on the data return by
- * any of the preceding reads. This primitive is much lighter weight than
- * rmb() on most CPUs, and is never heavier weight than is
- * rmb().
- *
- * These ordering constraints are respected by both the local CPU
- * and the compiler.
- *
- * Ordering is not guaranteed by anything other than these primitives,
- * not even by data dependencies. See the documentation for
- * memory_barrier() for examples and URLs to more information.
- *
- * For example, the following code would force ordering (the initial
- * value of "a" is zero, "b" is one, and "p" is "&a"):
- *
- * <programlisting>
- * CPU 0 CPU 1
- *
- * b = 2;
- * memory_barrier();
- * p = &b; q = p;
- * read_barrier_depends();
- * d = *q;
- * </programlisting>
- *
- * because the read of "*q" depends on the read of "p" and these
- * two reads are separated by a read_barrier_depends(). However,
- * the following code, with the same initial values for "a" and "b":
- *
- * <programlisting>
- * CPU 0 CPU 1
- *
- * a = 2;
- * memory_barrier();
- * b = 3; y = b;
- * read_barrier_depends();
- * x = a;
- * </programlisting>
- *
- * does not enforce ordering, since there is no data dependency between
- * the read of "a" and the read of "b". Therefore, on some CPUs, such
- * as Alpha, "y" could be set to 3 and "x" to 0. Use rmb()
- * in cases like this where there are no data dependencies.
- **/
-
-#define read_barrier_depends() do { } while (0)
-
-#ifdef CONFIG_SMP
-#define smp_mb() mb()
-#ifdef CONFIG_X86_PPRO_FENCE
-# define smp_rmb() rmb()
-#else
-# define smp_rmb() barrier()
-#endif
-#ifdef CONFIG_X86_OOSTORE
-# define smp_wmb() wmb()
-#else
-# define smp_wmb() barrier()
-#endif
-#define smp_read_barrier_depends() read_barrier_depends()
-#define set_mb(var, value) do { (void)xchg(&var, value); } while (0)
-#else
-#define smp_mb() barrier()
-#define smp_rmb() barrier()
-#define smp_wmb() barrier()
-#define smp_read_barrier_depends() do { } while (0)
-#define set_mb(var, value) do { var = value; barrier(); } while (0)
-#endif
-
-/*
- * Stop RDTSC speculation. This is needed when you need to use RDTSC
- * (or get_cycles or vread that possibly accesses the TSC) in a defined
- * code region.
- *
- * (Could use an alternative three way for this if there was one.)
- */
-static inline void rdtsc_barrier(void)
-{
- alternative(ASM_NOP3, "mfence", X86_FEATURE_MFENCE_RDTSC);
- alternative(ASM_NOP3, "lfence", X86_FEATURE_LFENCE_RDTSC);
-}
-
-extern void *_switch_to(void *prev, void *next, void *last);
-#define switch_to(prev, next, last) prev = _switch_to(prev, next, last)
-
-#endif
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index 988828b..b8e2794 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -1859,6 +1859,7 @@ pgd_t * __init xen_setup_kernel_pagetable(pgd_t *pgd,
#endif /* CONFIG_X86_64 */
static unsigned char dummy_mapping[PAGE_SIZE] __page_aligned_bss;
+static unsigned char fake_ioapic_mapping[PAGE_SIZE] __page_aligned_bss;
static void xen_set_fixmap(unsigned idx, phys_addr_t phys, pgprot_t prot)
{
@@ -1899,7 +1900,7 @@ static void xen_set_fixmap(unsigned idx, phys_addr_t phys, pgprot_t prot)
* We just don't map the IO APIC - all access is via
* hypercalls. Keep the address in the pte for reference.
*/
- pte = pfn_pte(PFN_DOWN(__pa(dummy_mapping)), PAGE_KERNEL);
+ pte = pfn_pte(PFN_DOWN(__pa(fake_ioapic_mapping)), PAGE_KERNEL);
break;
#endif
@@ -2064,6 +2065,7 @@ void __init xen_init_mmu_ops(void)
pv_mmu_ops = xen_mmu_ops;
memset(dummy_mapping, 0xff, PAGE_SIZE);
+ memset(fake_ioapic_mapping, 0xfd, PAGE_SIZE);
}
/* Protected by xen_reservation_lock. */
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index 02900e8..5fac691 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -59,7 +59,7 @@ static irqreturn_t xen_reschedule_interrupt(int irq, void *dev_id)
static void __cpuinit cpu_bringup(void)
{
- int cpu = smp_processor_id();
+ int cpu;
cpu_init();
touch_softlockup_watchdog();
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