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authorMike Travis <travis@sgi.com>2008-12-31 17:34:16 -0800
committerIngo Molnar <mingo@elte.hu>2009-01-03 18:53:31 +0100
commit7eb19553369c46cc1fa64caf120cbcab1b597f7c (patch)
treeef1a3beae706b9497c845d0a2557ceb4d2754998 /arch/x86/kernel
parent6092848a2a23b660150a38bc06f59d75838d70c8 (diff)
parent8c384cdee3e04d6194a2c2b192b624754f990835 (diff)
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-cpumask into merge-rr-cpumask
Conflicts: arch/x86/kernel/io_apic.c kernel/rcuclassic.c kernel/sched.c kernel/time/tick-sched.c Signed-off-by: Mike Travis <travis@sgi.com> [ mingo@elte.hu: backmerged typo fix for io_apic.c ] Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel')
-rw-r--r--arch/x86/kernel/Makefile8
-rw-r--r--arch/x86/kernel/amd_iommu.c6
-rw-r--r--arch/x86/kernel/amd_iommu_init.c8
-rw-r--r--arch/x86/kernel/aperture_64.c5
-rw-r--r--arch/x86/kernel/apic.c22
-rw-r--r--arch/x86/kernel/asm-offsets_32.c2
-rw-r--r--arch/x86/kernel/asm-offsets_64.c4
-rw-r--r--arch/x86/kernel/bios_uv.c58
-rw-r--r--arch/x86/kernel/check.c161
-rw-r--r--arch/x86/kernel/cpu/Makefile6
-rw-r--r--arch/x86/kernel/cpu/addon_cpuid_features.c8
-rw-r--r--arch/x86/kernel/cpu/amd.c9
-rw-r--r--arch/x86/kernel/cpu/common.c8
-rw-r--r--arch/x86/kernel/cpu/hypervisor.c58
-rw-r--r--arch/x86/kernel/cpu/intel.c22
-rw-r--r--arch/x86/kernel/cpu/intel_cacheinfo.c17
-rw-r--r--arch/x86/kernel/cpu/mcheck/mce_64.c3
-rw-r--r--arch/x86/kernel/cpu/mcheck/mce_amd_64.c2
-rw-r--r--arch/x86/kernel/cpu/mcheck/mce_intel_64.c2
-rw-r--r--arch/x86/kernel/cpu/mtrr/main.c346
-rw-r--r--arch/x86/kernel/cpu/vmware.c112
-rw-r--r--arch/x86/kernel/ds.c899
-rw-r--r--arch/x86/kernel/e820.c16
-rw-r--r--arch/x86/kernel/early-quirks.c1
-rw-r--r--arch/x86/kernel/early_printk.c47
-rw-r--r--arch/x86/kernel/entry_32.S477
-rw-r--r--arch/x86/kernel/entry_64.S1417
-rw-r--r--arch/x86/kernel/genx2apic_uv_x.c111
-rw-r--r--arch/x86/kernel/head.c1
-rw-r--r--arch/x86/kernel/head32.c3
-rw-r--r--arch/x86/kernel/head64.c3
-rw-r--r--arch/x86/kernel/hpet.c11
-rw-r--r--arch/x86/kernel/init_task.c1
-rw-r--r--arch/x86/kernel/io_apic.c5
-rw-r--r--arch/x86/kernel/irq_64.c27
-rw-r--r--arch/x86/kernel/irqinit_32.c2
-rw-r--r--arch/x86/kernel/irqinit_64.c66
-rw-r--r--arch/x86/kernel/microcode_amd.c232
-rw-r--r--arch/x86/kernel/microcode_core.c25
-rw-r--r--arch/x86/kernel/microcode_intel.c8
-rw-r--r--arch/x86/kernel/nmi.c15
-rw-r--r--arch/x86/kernel/pci-dma.c24
-rw-r--r--arch/x86/kernel/pci-gart_64.c4
-rw-r--r--arch/x86/kernel/pci-swiotlb_64.c29
-rw-r--r--arch/x86/kernel/process.c3
-rw-r--r--arch/x86/kernel/process_32.c63
-rw-r--r--arch/x86/kernel/process_64.c54
-rw-r--r--arch/x86/kernel/ptrace.c464
-rw-r--r--arch/x86/kernel/quirks.c2
-rw-r--r--arch/x86/kernel/setup.c162
-rw-r--r--arch/x86/kernel/setup_percpu.c8
-rw-r--r--arch/x86/kernel/sigframe.h42
-rw-r--r--arch/x86/kernel/signal.c (renamed from arch/x86/kernel/signal_32.c)567
-rw-r--r--arch/x86/kernel/signal_64.c516
-rw-r--r--arch/x86/kernel/smp.c18
-rw-r--r--arch/x86/kernel/smpboot.c19
-rw-r--r--arch/x86/kernel/time_32.c2
-rw-r--r--arch/x86/kernel/time_64.c6
-rw-r--r--arch/x86/kernel/tlb_32.c13
-rw-r--r--arch/x86/kernel/tlb_64.c2
-rw-r--r--arch/x86/kernel/tlb_uv.c4
-rw-r--r--arch/x86/kernel/trampoline.c19
-rw-r--r--arch/x86/kernel/traps.c38
-rw-r--r--arch/x86/kernel/tsc.c42
-rw-r--r--arch/x86/kernel/tsc_sync.c8
-rw-r--r--arch/x86/kernel/vmi_32.c119
-rw-r--r--arch/x86/kernel/vmlinux_32.lds.S1
-rw-r--r--arch/x86/kernel/vmlinux_64.lds.S1
-rw-r--r--arch/x86/kernel/vsyscall_64.c9
69 files changed, 3151 insertions, 3322 deletions
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index 1cad9318d21..d364df03c1d 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -12,6 +12,7 @@ CFLAGS_REMOVE_tsc.o = -pg
CFLAGS_REMOVE_rtc.o = -pg
CFLAGS_REMOVE_paravirt-spinlocks.o = -pg
CFLAGS_REMOVE_ftrace.o = -pg
+CFLAGS_REMOVE_early_printk.o = -pg
endif
#
@@ -23,7 +24,7 @@ CFLAGS_vsyscall_64.o := $(PROFILING) -g0 $(nostackp)
CFLAGS_hpet.o := $(nostackp)
CFLAGS_tsc.o := $(nostackp)
-obj-y := process_$(BITS).o signal_$(BITS).o entry_$(BITS).o
+obj-y := process_$(BITS).o signal.o entry_$(BITS).o
obj-y += traps.o irq.o irq_$(BITS).o dumpstack_$(BITS).o
obj-y += time_$(BITS).o ioport.o ldt.o dumpstack.o
obj-y += setup.o i8259.o irqinit_$(BITS).o setup_percpu.o
@@ -106,6 +107,10 @@ microcode-$(CONFIG_MICROCODE_INTEL) += microcode_intel.o
microcode-$(CONFIG_MICROCODE_AMD) += microcode_amd.o
obj-$(CONFIG_MICROCODE) += microcode.o
+obj-$(CONFIG_X86_CHECK_BIOS_CORRUPTION) += check.o
+
+obj-$(CONFIG_SWIOTLB) += pci-swiotlb_64.o # NB rename without _64
+
###
# 64 bit specific files
ifeq ($(CONFIG_X86_64),y)
@@ -119,7 +124,6 @@ ifeq ($(CONFIG_X86_64),y)
obj-$(CONFIG_GART_IOMMU) += pci-gart_64.o aperture_64.o
obj-$(CONFIG_CALGARY_IOMMU) += pci-calgary_64.o tce_64.o
obj-$(CONFIG_AMD_IOMMU) += amd_iommu_init.o amd_iommu.o
- obj-$(CONFIG_SWIOTLB) += pci-swiotlb_64.o
obj-$(CONFIG_PCI_MMCONFIG) += mmconf-fam10h_64.o
endif
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index a7b6dec6fc3..2e2da717b35 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -24,6 +24,7 @@
#include <linux/iommu-helper.h>
#include <asm/proto.h>
#include <asm/iommu.h>
+#include <asm/gart.h>
#include <asm/amd_iommu_types.h>
#include <asm/amd_iommu.h>
@@ -235,8 +236,9 @@ static int iommu_completion_wait(struct amd_iommu *iommu)
status &= ~MMIO_STATUS_COM_WAIT_INT_MASK;
writel(status, iommu->mmio_base + MMIO_STATUS_OFFSET);
- if (unlikely((i == EXIT_LOOP_COUNT) && printk_ratelimit()))
- printk(KERN_WARNING "AMD IOMMU: Completion wait loop failed\n");
+ if (unlikely(i == EXIT_LOOP_COUNT))
+ panic("AMD IOMMU: Completion wait loop failed\n");
+
out:
spin_unlock_irqrestore(&iommu->lock, flags);
diff --git a/arch/x86/kernel/amd_iommu_init.c b/arch/x86/kernel/amd_iommu_init.c
index 30ae2701b3d..c625800c55c 100644
--- a/arch/x86/kernel/amd_iommu_init.c
+++ b/arch/x86/kernel/amd_iommu_init.c
@@ -28,6 +28,7 @@
#include <asm/amd_iommu_types.h>
#include <asm/amd_iommu.h>
#include <asm/iommu.h>
+#include <asm/gart.h>
/*
* definitions for the ACPI scanning code
@@ -427,6 +428,10 @@ static u8 * __init alloc_command_buffer(struct amd_iommu *iommu)
memcpy_toio(iommu->mmio_base + MMIO_CMD_BUF_OFFSET,
&entry, sizeof(entry));
+ /* set head and tail to zero manually */
+ writel(0x00, iommu->mmio_base + MMIO_CMD_HEAD_OFFSET);
+ writel(0x00, iommu->mmio_base + MMIO_CMD_TAIL_OFFSET);
+
iommu_feature_enable(iommu, CONTROL_CMDBUF_EN);
return cmd_buf;
@@ -1074,7 +1079,8 @@ int __init amd_iommu_init(void)
goto free;
/* IOMMU rlookup table - find the IOMMU for a specific device */
- amd_iommu_rlookup_table = (void *)__get_free_pages(GFP_KERNEL,
+ amd_iommu_rlookup_table = (void *)__get_free_pages(
+ GFP_KERNEL | __GFP_ZERO,
get_order(rlookup_table_size));
if (amd_iommu_rlookup_table == NULL)
goto free;
diff --git a/arch/x86/kernel/aperture_64.c b/arch/x86/kernel/aperture_64.c
index 9a32b37ee2e..676debfc170 100644
--- a/arch/x86/kernel/aperture_64.c
+++ b/arch/x86/kernel/aperture_64.c
@@ -1,8 +1,9 @@
/*
* Firmware replacement code.
*
- * Work around broken BIOSes that don't set an aperture or only set the
- * aperture in the AGP bridge.
+ * Work around broken BIOSes that don't set an aperture, only set the
+ * aperture in the AGP bridge, or set too small aperture.
+ *
* If all fails map the aperture over some low memory. This is cheaper than
* doing bounce buffering. The memory is lost. This is done at early boot
* because only the bootmem allocator can allocate 32+MB.
diff --git a/arch/x86/kernel/apic.c b/arch/x86/kernel/apic.c
index b9019271af6..6b7f824db16 100644
--- a/arch/x86/kernel/apic.c
+++ b/arch/x86/kernel/apic.c
@@ -30,6 +30,7 @@
#include <linux/module.h>
#include <linux/dmi.h>
#include <linux/dmar.h>
+#include <linux/ftrace.h>
#include <asm/atomic.h>
#include <asm/smp.h>
@@ -775,11 +776,7 @@ static void local_apic_timer_interrupt(void)
/*
* the NMI deadlock-detector uses this.
*/
-#ifdef CONFIG_X86_64
- add_pda(apic_timer_irqs, 1);
-#else
- per_cpu(irq_stat, cpu).apic_timer_irqs++;
-#endif
+ inc_irq_stat(apic_timer_irqs);
evt->event_handler(evt);
}
@@ -792,7 +789,7 @@ static void local_apic_timer_interrupt(void)
* [ if a single-CPU system runs an SMP kernel then we call the local
* interrupt as well. Thus we cannot inline the local irq ... ]
*/
-void smp_apic_timer_interrupt(struct pt_regs *regs)
+void __irq_entry smp_apic_timer_interrupt(struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);
@@ -806,9 +803,7 @@ void smp_apic_timer_interrupt(struct pt_regs *regs)
* Besides, if we don't timer interrupts ignore the global
* interrupt lock, which is the WrongThing (tm) to do.
*/
-#ifdef CONFIG_X86_64
exit_idle();
-#endif
irq_enter();
local_apic_timer_interrupt();
irq_exit();
@@ -1666,9 +1661,7 @@ void smp_spurious_interrupt(struct pt_regs *regs)
{
u32 v;
-#ifdef CONFIG_X86_64
exit_idle();
-#endif
irq_enter();
/*
* Check if this really is a spurious interrupt and ACK it
@@ -1679,14 +1672,11 @@ void smp_spurious_interrupt(struct pt_regs *regs)
if (v & (1 << (SPURIOUS_APIC_VECTOR & 0x1f)))
ack_APIC_irq();
-#ifdef CONFIG_X86_64
- add_pda(irq_spurious_count, 1);
-#else
+ inc_irq_stat(irq_spurious_count);
+
/* see sw-dev-man vol 3, chapter 7.4.13.5 */
pr_info("spurious APIC interrupt on CPU#%d, "
"should never happen.\n", smp_processor_id());
- __get_cpu_var(irq_stat).irq_spurious_count++;
-#endif
irq_exit();
}
@@ -1697,9 +1687,7 @@ void smp_error_interrupt(struct pt_regs *regs)
{
u32 v, v1;
-#ifdef CONFIG_X86_64
exit_idle();
-#endif
irq_enter();
/* First tickle the hardware, only then report what went on. -- REW */
v = apic_read(APIC_ESR);
diff --git a/arch/x86/kernel/asm-offsets_32.c b/arch/x86/kernel/asm-offsets_32.c
index 6649d09ad88..ee4df08feee 100644
--- a/arch/x86/kernel/asm-offsets_32.c
+++ b/arch/x86/kernel/asm-offsets_32.c
@@ -11,7 +11,7 @@
#include <linux/suspend.h>
#include <linux/kbuild.h>
#include <asm/ucontext.h>
-#include "sigframe.h"
+#include <asm/sigframe.h>
#include <asm/pgtable.h>
#include <asm/fixmap.h>
#include <asm/processor.h>
diff --git a/arch/x86/kernel/asm-offsets_64.c b/arch/x86/kernel/asm-offsets_64.c
index 7fcf63d22f8..1d41d3f1edb 100644
--- a/arch/x86/kernel/asm-offsets_64.c
+++ b/arch/x86/kernel/asm-offsets_64.c
@@ -20,6 +20,8 @@
#include <xen/interface/xen.h>
+#include <asm/sigframe.h>
+
#define __NO_STUBS 1
#undef __SYSCALL
#undef _ASM_X86_UNISTD_64_H
@@ -87,7 +89,7 @@ int main(void)
BLANK();
#undef ENTRY
DEFINE(IA32_RT_SIGFRAME_sigcontext,
- offsetof (struct rt_sigframe32, uc.uc_mcontext));
+ offsetof (struct rt_sigframe_ia32, uc.uc_mcontext));
BLANK();
#endif
DEFINE(pbe_address, offsetof(struct pbe, address));
diff --git a/arch/x86/kernel/bios_uv.c b/arch/x86/kernel/bios_uv.c
index f0dfe6f17e7..2a0a2a3cac2 100644
--- a/arch/x86/kernel/bios_uv.c
+++ b/arch/x86/kernel/bios_uv.c
@@ -69,10 +69,10 @@ s64 uv_bios_call_reentrant(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
long sn_partition_id;
EXPORT_SYMBOL_GPL(sn_partition_id);
-long uv_coherency_id;
-EXPORT_SYMBOL_GPL(uv_coherency_id);
-long uv_region_size;
-EXPORT_SYMBOL_GPL(uv_region_size);
+long sn_coherency_id;
+EXPORT_SYMBOL_GPL(sn_coherency_id);
+long sn_region_size;
+EXPORT_SYMBOL_GPL(sn_region_size);
int uv_type;
@@ -100,6 +100,56 @@ s64 uv_bios_get_sn_info(int fc, int *uvtype, long *partid, long *coher,
return ret;
}
+int
+uv_bios_mq_watchlist_alloc(int blade, unsigned long addr, unsigned int mq_size,
+ unsigned long *intr_mmr_offset)
+{
+ union uv_watchlist_u size_blade;
+ u64 watchlist;
+ s64 ret;
+
+ size_blade.size = mq_size;
+ size_blade.blade = blade;
+
+ /*
+ * bios returns watchlist number or negative error number.
+ */
+ ret = (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_ALLOC, addr,
+ size_blade.val, (u64)intr_mmr_offset,
+ (u64)&watchlist, 0);
+ if (ret < BIOS_STATUS_SUCCESS)
+ return ret;
+
+ return watchlist;
+}
+EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_alloc);
+
+int
+uv_bios_mq_watchlist_free(int blade, int watchlist_num)
+{
+ return (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_FREE,
+ blade, watchlist_num, 0, 0, 0);
+}
+EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_free);
+
+s64
+uv_bios_change_memprotect(u64 paddr, u64 len, enum uv_memprotect perms)
+{
+ return uv_bios_call_irqsave(UV_BIOS_MEMPROTECT, paddr, len,
+ perms, 0, 0);
+}
+EXPORT_SYMBOL_GPL(uv_bios_change_memprotect);
+
+s64
+uv_bios_reserved_page_pa(u64 buf, u64 *cookie, u64 *addr, u64 *len)
+{
+ s64 ret;
+
+ ret = uv_bios_call_irqsave(UV_BIOS_GET_PARTITION_ADDR, (u64)cookie,
+ (u64)addr, buf, (u64)len, 0);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(uv_bios_reserved_page_pa);
s64 uv_bios_freq_base(u64 clock_type, u64 *ticks_per_second)
{
diff --git a/arch/x86/kernel/check.c b/arch/x86/kernel/check.c
new file mode 100644
index 00000000000..2ac0ab71412
--- /dev/null
+++ b/arch/x86/kernel/check.c
@@ -0,0 +1,161 @@
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/kthread.h>
+#include <linux/workqueue.h>
+#include <asm/e820.h>
+#include <asm/proto.h>
+
+/*
+ * Some BIOSes seem to corrupt the low 64k of memory during events
+ * like suspend/resume and unplugging an HDMI cable. Reserve all
+ * remaining free memory in that area and fill it with a distinct
+ * pattern.
+ */
+#define MAX_SCAN_AREAS 8
+
+static int __read_mostly memory_corruption_check = -1;
+
+static unsigned __read_mostly corruption_check_size = 64*1024;
+static unsigned __read_mostly corruption_check_period = 60; /* seconds */
+
+static struct e820entry scan_areas[MAX_SCAN_AREAS];
+static int num_scan_areas;
+
+
+static __init int set_corruption_check(char *arg)
+{
+ char *end;
+
+ memory_corruption_check = simple_strtol(arg, &end, 10);
+
+ return (*end == 0) ? 0 : -EINVAL;
+}
+early_param("memory_corruption_check", set_corruption_check);
+
+static __init int set_corruption_check_period(char *arg)
+{
+ char *end;
+
+ corruption_check_period = simple_strtoul(arg, &end, 10);
+
+ return (*end == 0) ? 0 : -EINVAL;
+}
+early_param("memory_corruption_check_period", set_corruption_check_period);
+
+static __init int set_corruption_check_size(char *arg)
+{
+ char *end;
+ unsigned size;
+
+ size = memparse(arg, &end);
+
+ if (*end == '\0')
+ corruption_check_size = size;
+
+ return (size == corruption_check_size) ? 0 : -EINVAL;
+}
+early_param("memory_corruption_check_size", set_corruption_check_size);
+
+
+void __init setup_bios_corruption_check(void)
+{
+ u64 addr = PAGE_SIZE; /* assume first page is reserved anyway */
+
+ if (memory_corruption_check == -1) {
+ memory_corruption_check =
+#ifdef CONFIG_X86_BOOTPARAM_MEMORY_CORRUPTION_CHECK
+ 1
+#else
+ 0
+#endif
+ ;
+ }
+
+ if (corruption_check_size == 0)
+ memory_corruption_check = 0;
+
+ if (!memory_corruption_check)
+ return;
+
+ corruption_check_size = round_up(corruption_check_size, PAGE_SIZE);
+
+ while (addr < corruption_check_size && num_scan_areas < MAX_SCAN_AREAS) {
+ u64 size;
+ addr = find_e820_area_size(addr, &size, PAGE_SIZE);
+
+ if (addr == 0)
+ break;
+
+ if ((addr + size) > corruption_check_size)
+ size = corruption_check_size - addr;
+
+ if (size == 0)
+ break;
+
+ e820_update_range(addr, size, E820_RAM, E820_RESERVED);
+ scan_areas[num_scan_areas].addr = addr;
+ scan_areas[num_scan_areas].size = size;
+ num_scan_areas++;
+
+ /* Assume we've already mapped this early memory */
+ memset(__va(addr), 0, size);
+
+ addr += size;
+ }
+
+ printk(KERN_INFO "Scanning %d areas for low memory corruption\n",
+ num_scan_areas);
+ update_e820();
+}
+
+
+void check_for_bios_corruption(void)
+{
+ int i;
+ int corruption = 0;
+
+ if (!memory_corruption_check)
+ return;
+
+ for (i = 0; i < num_scan_areas; i++) {
+ unsigned long *addr = __va(scan_areas[i].addr);
+ unsigned long size = scan_areas[i].size;
+
+ for (; size; addr++, size -= sizeof(unsigned long)) {
+ if (!*addr)
+ continue;
+ printk(KERN_ERR "Corrupted low memory at %p (%lx phys) = %08lx\n",
+ addr, __pa(addr), *addr);
+ corruption = 1;
+ *addr = 0;
+ }
+ }
+
+ WARN_ONCE(corruption, KERN_ERR "Memory corruption detected in low memory\n");
+}
+
+static void check_corruption(struct work_struct *dummy);
+static DECLARE_DELAYED_WORK(bios_check_work, check_corruption);
+
+static void check_corruption(struct work_struct *dummy)
+{
+ check_for_bios_corruption();
+ schedule_delayed_work(&bios_check_work,
+ round_jiffies_relative(corruption_check_period*HZ));
+}
+
+static int start_periodic_check_for_corruption(void)
+{
+ if (!memory_corruption_check || corruption_check_period == 0)
+ return 0;
+
+ printk(KERN_INFO "Scanning for low memory corruption every %d seconds\n",
+ corruption_check_period);
+
+ /* First time we run the checks right away */
+ schedule_delayed_work(&bios_check_work, 0);
+ return 0;
+}
+
+module_init(start_periodic_check_for_corruption);
+
diff --git a/arch/x86/kernel/cpu/Makefile b/arch/x86/kernel/cpu/Makefile
index 82ec6075c05..82db7f45e2d 100644
--- a/arch/x86/kernel/cpu/Makefile
+++ b/arch/x86/kernel/cpu/Makefile
@@ -2,8 +2,14 @@
# Makefile for x86-compatible CPU details and quirks
#
+# Don't trace early stages of a secondary CPU boot
+ifdef CONFIG_FUNCTION_TRACER
+CFLAGS_REMOVE_common.o = -pg
+endif
+
obj-y := intel_cacheinfo.o addon_cpuid_features.o
obj-y += proc.o capflags.o powerflags.o common.o
+obj-y += vmware.o hypervisor.o
obj-$(CONFIG_X86_32) += bugs.o cmpxchg.o
obj-$(CONFIG_X86_64) += bugs_64.o
diff --git a/arch/x86/kernel/cpu/addon_cpuid_features.c b/arch/x86/kernel/cpu/addon_cpuid_features.c
index ef8f831af82..2cf23634b6d 100644
--- a/arch/x86/kernel/cpu/addon_cpuid_features.c
+++ b/arch/x86/kernel/cpu/addon_cpuid_features.c
@@ -120,9 +120,17 @@ void __cpuinit detect_extended_topology(struct cpuinfo_x86 *c)
c->cpu_core_id = phys_pkg_id(c->initial_apicid, ht_mask_width)
& core_select_mask;
c->phys_proc_id = phys_pkg_id(c->initial_apicid, core_plus_mask_width);
+ /*
+ * Reinit the apicid, now that we have extended initial_apicid.
+ */
+ c->apicid = phys_pkg_id(c->initial_apicid, 0);
#else
c->cpu_core_id = phys_pkg_id(ht_mask_width) & core_select_mask;
c->phys_proc_id = phys_pkg_id(core_plus_mask_width);
+ /*
+ * Reinit the apicid, now that we have extended initial_apicid.
+ */
+ c->apicid = phys_pkg_id(0);
#endif
c->x86_max_cores = (core_level_siblings / smp_num_siblings);
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index 8f1e31db2ad..7c878f6aa91 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -283,9 +283,14 @@ static void __cpuinit early_init_amd(struct cpuinfo_x86 *c)
{
early_init_amd_mc(c);
- /* c->x86_power is 8000_0007 edx. Bit 8 is constant TSC */
- if (c->x86_power & (1<<8))
+ /*
+ * c->x86_power is 8000_0007 edx. Bit 8 is TSC runs at constant rate
+ * with P/T states and does not stop in deep C-states
+ */
+ if (c->x86_power & (1 << 8)) {
set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
+ set_cpu_cap(c, X86_FEATURE_NONSTOP_TSC);
+ }
#ifdef CONFIG_X86_64
set_cpu_cap(c, X86_FEATURE_SYSCALL32);
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index b9c9ea0217a..42e0853030c 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -36,6 +36,7 @@
#include <asm/proto.h>
#include <asm/sections.h>
#include <asm/setup.h>
+#include <asm/hypervisor.h>
#include "cpu.h"
@@ -703,6 +704,7 @@ static void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
detect_ht(c);
#endif
+ init_hypervisor(c);
/*
* On SMP, boot_cpu_data holds the common feature set between
* all CPUs; so make sure that we indicate which features are
@@ -862,7 +864,7 @@ EXPORT_SYMBOL(_cpu_pda);
struct desc_ptr idt_descr = { 256 * 16 - 1, (unsigned long) idt_table };
-char boot_cpu_stack[IRQSTACKSIZE] __page_aligned_bss;
+static char boot_cpu_stack[IRQSTACKSIZE] __page_aligned_bss;
void __cpuinit pda_init(int cpu)
{
@@ -903,8 +905,8 @@ void __cpuinit pda_init(int cpu)
}
}
-char boot_exception_stacks[(N_EXCEPTION_STACKS - 1) * EXCEPTION_STKSZ +
- DEBUG_STKSZ] __page_aligned_bss;
+static char boot_exception_stacks[(N_EXCEPTION_STACKS - 1) * EXCEPTION_STKSZ +
+ DEBUG_STKSZ] __page_aligned_bss;
extern asmlinkage void ignore_sysret(void);
diff --git a/arch/x86/kernel/cpu/hypervisor.c b/arch/x86/kernel/cpu/hypervisor.c
new file mode 100644
index 00000000000..fb5b86af0b0
--- /dev/null
+++ b/arch/x86/kernel/cpu/hypervisor.c
@@ -0,0 +1,58 @@
+/*
+ * Common hypervisor code
+ *
+ * Copyright (C) 2008, VMware, Inc.
+ * Author : Alok N Kataria <akataria@vmware.com>
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#include <asm/processor.h>
+#include <asm/vmware.h>
+#include <asm/hypervisor.h>
+
+static inline void __cpuinit
+detect_hypervisor_vendor(struct cpuinfo_x86 *c)
+{
+ if (vmware_platform()) {
+ c->x86_hyper_vendor = X86_HYPER_VENDOR_VMWARE;
+ } else {
+ c->x86_hyper_vendor = X86_HYPER_VENDOR_NONE;
+ }
+}
+
+unsigned long get_hypervisor_tsc_freq(void)
+{
+ if (boot_cpu_data.x86_hyper_vendor == X86_HYPER_VENDOR_VMWARE)
+ return vmware_get_tsc_khz();
+ return 0;
+}
+
+static inline void __cpuinit
+hypervisor_set_feature_bits(struct cpuinfo_x86 *c)
+{
+ if (boot_cpu_data.x86_hyper_vendor == X86_HYPER_VENDOR_VMWARE) {
+ vmware_set_feature_bits(c);
+ return;
+ }
+}
+
+void __cpuinit init_hypervisor(struct cpuinfo_x86 *c)
+{
+ detect_hypervisor_vendor(c);
+ hypervisor_set_feature_bits(c);
+}
diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index 816f27f289b..8ea6929e974 100644
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -11,7 +11,6 @@
#include <asm/pgtable.h>
#include <asm/msr.h>
#include <asm/uaccess.h>
-#include <asm/ptrace.h>
#include <asm/ds.h>
#include <asm/bugs.h>
@@ -41,6 +40,16 @@ static void __cpuinit early_init_intel(struct cpuinfo_x86 *c)
if (c->x86 == 15 && c->x86_cache_alignment == 64)
c->x86_cache_alignment = 128;
#endif
+
+ /*
+ * c->x86_power is 8000_0007 edx. Bit 8 is TSC runs at constant rate
+ * with P/T states and does not stop in deep C-states
+ */
+ if (c->x86_power & (1 << 8)) {
+ set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
+ set_cpu_cap(c, X86_FEATURE_NONSTOP_TSC);
+ }
+
}
#ifdef CONFIG_X86_32
@@ -242,6 +251,13 @@ static void __cpuinit init_intel(struct cpuinfo_x86 *c)
intel_workarounds(c);
+ /*
+ * Detect the extended topology information if available. This
+ * will reinitialise the initial_apicid which will be used
+ * in init_intel_cacheinfo()
+ */
+ detect_extended_topology(c);
+
l2 = init_intel_cacheinfo(c);
if (c->cpuid_level > 9) {
unsigned eax = cpuid_eax(10);
@@ -309,10 +325,6 @@ static void __cpuinit init_intel(struct cpuinfo_x86 *c)
set_cpu_cap(c, X86_FEATURE_P3);
#endif
- if (cpu_has_bts)
- ptrace_bts_init_intel(c);
-
- detect_extended_topology(c);
if (!cpu_has(c, X86_FEATURE_XTOPOLOGY)) {
/*
* let's use the legacy cpuid vector 0x1 and 0x4 for topology
diff --git a/arch/x86/kernel/cpu/intel_cacheinfo.c b/arch/x86/kernel/cpu/intel_cacheinfo.c
index 7bd00a56567..48533d77be7 100644
--- a/arch/x86/kernel/cpu/intel_cacheinfo.c
+++ b/arch/x86/kernel/cpu/intel_cacheinfo.c
@@ -641,20 +641,17 @@ static inline ssize_t show_shared_cpu_list(struct _cpuid4_info *leaf, char *buf)
return show_shared_cpu_map_func(leaf, 1, buf);
}
-static ssize_t show_type(struct _cpuid4_info *this_leaf, char *buf) {
- switch(this_leaf->eax.split.type) {
- case CACHE_TYPE_DATA:
+static ssize_t show_type(struct _cpuid4_info *this_leaf, char *buf)
+{
+ switch (this_leaf->eax.split.type) {
+ case CACHE_TYPE_DATA:
return sprintf(buf, "Data\n");
- break;
- case CACHE_TYPE_INST:
+ case CACHE_TYPE_INST:
return sprintf(buf, "Instruction\n");
- break;
- case CACHE_TYPE_UNIFIED:
+ case CACHE_TYPE_UNIFIED:
return sprintf(buf, "Unified\n");
- break;
- default:
+ default:
return sprintf(buf, "Unknown\n");
- break;
}
}
diff --git a/arch/x86/kernel/cpu/mcheck/mce_64.c b/arch/x86/kernel/cpu/mcheck/mce_64.c
index 4b031a4ac85..1c838032fd3 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_64.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_64.c
@@ -510,12 +510,9 @@ static void __cpuinit mce_cpu_features(struct cpuinfo_x86 *c)
*/
void __cpuinit mcheck_init(struct cpuinfo_x86 *c)
{
- static cpumask_t mce_cpus = CPU_MASK_NONE;
-
mce_cpu_quirks(c);
if (mce_dont_init ||
- cpu_test_and_set(smp_processor_id(), mce_cpus) ||
!mce_available(c))
return;
diff --git a/arch/x86/kernel/cpu/mcheck/mce_amd_64.c b/arch/x86/kernel/cpu/mcheck/mce_amd_64.c
index a1de80f368f..a5a5e053037 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_amd_64.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_amd_64.c
@@ -248,7 +248,7 @@ asmlinkage void mce_threshold_interrupt(void)
}
}
out:
- add_pda(irq_threshold_count, 1);
+ inc_irq_stat(irq_threshold_count);
irq_exit();
}
diff --git a/arch/x86/kernel/cpu/mcheck/mce_intel_64.c b/arch/x86/kernel/cpu/mcheck/mce_intel_64.c
index c17eaf5dd6d..4b48f251fd3 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_intel_64.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_intel_64.c
@@ -26,7 +26,7 @@ asmlinkage void smp_thermal_interrupt(void)
if (therm_throt_process(msr_val & 1))
mce_log_therm_throt_event(smp_processor_id(), msr_val);
- add_pda(irq_thermal_count, 1);
+ inc_irq_stat(irq_thermal_count);
irq_exit();
}
diff --git a/arch/x86/kernel/cpu/mtrr/main.c b/arch/x86/kernel/cpu/mtrr/main.c
index c78c04821ea..1159e269e59 100644
--- a/arch/x86/kernel/cpu/mtrr/main.c
+++ b/arch/x86/kernel/cpu/mtrr/main.c
@@ -803,6 +803,7 @@ x86_get_mtrr_mem_range(struct res_range *range, int nr_range,
}
static struct res_range __initdata range[RANGE_NUM];
+static int __initdata nr_range;
#ifdef CONFIG_MTRR_SANITIZER
@@ -1206,39 +1207,43 @@ struct mtrr_cleanup_result {
#define PSHIFT (PAGE_SHIFT - 10)
static struct mtrr_cleanup_result __initdata result[NUM_RESULT];
-static struct res_range __initdata range_new[RANGE_NUM];
static unsigned long __initdata min_loss_pfn[RANGE_NUM];
-static int __init mtrr_cleanup(unsigned address_bits)
+static void __init print_out_mtrr_range_state(void)
{
- unsigned long extra_remove_base, extra_remove_size;
- unsigned long base, size, def, dummy;
- mtrr_type type;
- int nr_range, nr_range_new;
- u64 chunk_size, gran_size;
- unsigned long range_sums, range_sums_new;
- int index_good;
- int num_reg_good;
int i;
+ char start_factor = 'K', size_factor = 'K';
+ unsigned long start_base, size_base;
+ mtrr_type type;
- /* extra one for all 0 */
- int num[MTRR_NUM_TYPES + 1];
+ for (i = 0; i < num_var_ranges; i++) {
- if (!is_cpu(INTEL) || enable_mtrr_cleanup < 1)
- return 0;
- rdmsr(MTRRdefType_MSR, def, dummy);
- def &= 0xff;
- if (def != MTRR_TYPE_UNCACHABLE)
- return 0;
+ size_base = range_state[i].size_pfn << (PAGE_SHIFT - 10);
+ if (!size_base)
+ continue;
- /* get it and store it aside */
- memset(range_state, 0, sizeof(range_state));
- for (i = 0; i < num_var_ranges; i++) {
- mtrr_if->get(i, &base, &size, &type);
- range_state[i].base_pfn = base;
- range_state[i].size_pfn = size;
- range_state[i].type = type;
+ size_base = to_size_factor(size_base, &size_factor),
+ start_base = range_state[i].base_pfn << (PAGE_SHIFT - 10);
+ start_base = to_size_factor(start_base, &start_factor),
+ type = range_state[i].type;
+
+ printk(KERN_DEBUG "reg %d, base: %ld%cB, range: %ld%cB, type %s\n",
+ i, start_base, start_factor,
+ size_base, size_factor,
+ (type == MTRR_TYPE_UNCACHABLE) ? "UC" :
+ ((type == MTRR_TYPE_WRPROT) ? "WP" :
+ ((type == MTRR_TYPE_WRBACK) ? "WB" : "Other"))
+ );
}
+}
+
+static int __init mtrr_need_cleanup(void)
+{
+ int i;
+ mtrr_type type;
+ unsigned long size;
+ /* extra one for all 0 */
+ int num[MTRR_NUM_TYPES + 1];
/* check entries number */
memset(num, 0, sizeof(num));
@@ -1263,29 +1268,133 @@ static int __init mtrr_cleanup(unsigned address_bits)
num_var_ranges - num[MTRR_NUM_TYPES])
return 0;
- /* print original var MTRRs at first, for debugging: */
- printk(KERN_DEBUG "original variable MTRRs\n");
- for (i = 0; i < num_var_ranges; i++) {
- char start_factor = 'K', size_factor = 'K';
- unsigned long start_base, size_base;
+ return 1;
+}
- size_base = range_state[i].size_pfn << (PAGE_SHIFT - 10);
- if (!size_base)
- continue;
+static unsigned long __initdata range_sums;
+static void __init mtrr_calc_range_state(u64 chunk_size, u64 gran_size,
+ unsigned long extra_remove_base,
+ unsigned long extra_remove_size,
+ int i)
+{
+ int num_reg;
+ static struct res_range range_new[RANGE_NUM];
+ static int nr_range_new;
+ unsigned long range_sums_new;
+
+ /* convert ranges to var ranges state */
+ num_reg = x86_setup_var_mtrrs(range, nr_range,
+ chunk_size, gran_size);
+
+ /* we got new setting in range_state, check it */
+ memset(range_new, 0, sizeof(range_new));
+ nr_range_new = x86_get_mtrr_mem_range(range_new, 0,
+ extra_remove_base, extra_remove_size);
+ range_sums_new = sum_ranges(range_new, nr_range_new);
+
+ result[i].chunk_sizek = chunk_size >> 10;
+ result[i].gran_sizek = gran_size >> 10;
+ result[i].num_reg = num_reg;
+ if (range_sums < range_sums_new) {
+ result[i].lose_cover_sizek =
+ (range_sums_new - range_sums) << PSHIFT;
+ result[i].bad = 1;
+ } else
+ result[i].lose_cover_sizek =
+ (range_sums - range_sums_new) << PSHIFT;
- size_base = to_size_factor(size_base, &size_factor),
- start_base = range_state[i].base_pfn << (PAGE_SHIFT - 10);
- start_base = to_size_factor(start_base, &start_factor),
- type = range_state[i].type;
+ /* double check it */
+ if (!result[i].bad && !result[i].lose_cover_sizek) {
+ if (nr_range_new != nr_range ||
+ memcmp(range, range_new, sizeof(range)))
+ result[i].bad = 1;
+ }
- printk(KERN_DEBUG "reg %d, base: %ld%cB, range: %ld%cB, type %s\n",
- i, start_base, start_factor,
- size_base, size_factor,
- (type == MTRR_TYPE_UNCACHABLE) ? "UC" :
- ((type == MTRR_TYPE_WRPROT) ? "WP" :
- ((type == MTRR_TYPE_WRBACK) ? "WB" : "Other"))
- );
+ if (!result[i].bad && (range_sums - range_sums_new <
+ min_loss_pfn[num_reg])) {
+ min_loss_pfn[num_reg] =
+ range_sums - range_sums_new;
}
+}
+
+static void __init mtrr_print_out_one_result(int i)
+{
+ char gran_factor, chunk_factor, lose_factor;
+ unsigned long gran_base, chunk_base, lose_base;
+
+ gran_base = to_size_factor(result[i].gran_sizek, &gran_factor),
+ chunk_base = to_size_factor(result[i].chunk_sizek, &chunk_factor),
+ lose_base = to_size_factor(result[i].lose_cover_sizek, &lose_factor),
+ printk(KERN_INFO "%sgran_size: %ld%c \tchunk_size: %ld%c \t",
+ result[i].bad ? "*BAD*" : " ",
+ gran_base, gran_factor, chunk_base, chunk_factor);
+ printk(KERN_CONT "num_reg: %d \tlose cover RAM: %s%ld%c\n",
+ result[i].num_reg, result[i].bad ? "-" : "",
+ lose_base, lose_factor);
+}
+
+static int __init mtrr_search_optimal_index(void)
+{
+ int i;
+ int num_reg_good;
+ int index_good;
+
+ if (nr_mtrr_spare_reg >= num_var_ranges)
+ nr_mtrr_spare_reg = num_var_ranges - 1;
+ num_reg_good = -1;
+ for (i = num_var_ranges - nr_mtrr_spare_reg; i > 0; i--) {
+ if (!min_loss_pfn[i])
+ num_reg_good = i;
+ }
+
+ index_good = -1;
+ if (num_reg_good != -1) {
+ for (i = 0; i < NUM_RESULT; i++) {
+ if (!result[i].bad &&
+ result[i].num_reg == num_reg_good &&
+ !result[i].lose_cover_sizek) {
+ index_good = i;
+ break;
+ }
+ }
+ }
+
+ return index_good;
+}
+
+
+static int __init mtrr_cleanup(unsigned address_bits)
+{
+ unsigned long extra_remove_base, extra_remove_size;
+ unsigned long base, size, def, dummy;
+ mtrr_type type;
+ u64 chunk_size, gran_size;
+ int index_good;
+ int i;
+
+ if (!is_cpu(INTEL) || enable_mtrr_cleanup < 1)
+ return 0;
+ rdmsr(MTRRdefType_MSR, def, dummy);
+ def &= 0xff;
+ if (def != MTRR_TYPE_UNCACHABLE)
+ return 0;
+
+ /* get it and store it aside */
+ memset(range_state, 0, sizeof(range_state));
+ for (i = 0; i < num_var_ranges; i++) {
+ mtrr_if->get(i, &base, &size, &type);
+ range_state[i].base_pfn = base;
+ range_state[i].size_pfn = size;
+ range_state[i].type = type;
+ }
+
+ /* check if we need handle it and can handle it */
+ if (!mtrr_need_cleanup())
+ return 0;
+
+ /* print original var MTRRs at first, for debugging: */
+ printk(KERN_DEBUG "original variable MTRRs\n");
+ print_out_mtrr_range_state();
memset(range, 0, sizeof(range));
extra_remove_size = 0;
@@ -1309,176 +1418,64 @@ static int __init mtrr_cleanup(unsigned address_bits)
range_sums >> (20 - PAGE_SHIFT));
if (mtrr_chunk_size && mtrr_gran_size) {
- int num_reg;
- char gran_factor, chunk_factor, lose_factor;
- unsigned long gran_base, chunk_base, lose_base;
-
- debug_print++;
- /* convert ranges to var ranges state */
- num_reg = x86_setup_var_mtrrs(range, nr_range, mtrr_chunk_size,
- mtrr_gran_size);
+ i = 0;
+ mtrr_calc_range_state(mtrr_chunk_size, mtrr_gran_size,
+ extra_remove_base, extra_remove_size, i);
- /* we got new setting in range_state, check it */
- memset(range_new, 0, sizeof(range_new));
- nr_range_new = x86_get_mtrr_mem_range(range_new, 0,
- extra_remove_base,
- extra_remove_size);
- range_sums_new = sum_ranges(range_new, nr_range_new);
+ mtrr_print_out_one_result(i);
- i = 0;
- result[i].chunk_sizek = mtrr_chunk_size >> 10;
- result[i].gran_sizek = mtrr_gran_size >> 10;
- result[i].num_reg = num_reg;
- if (range_sums < range_sums_new) {
- result[i].lose_cover_sizek =
- (range_sums_new - range_sums) << PSHIFT;
- result[i].bad = 1;
- } else
- result[i].lose_cover_sizek =
- (range_sums - range_sums_new) << PSHIFT;
-
- gran_base = to_size_factor(result[i].gran_sizek, &gran_factor),
- chunk_base = to_size_factor(result[i].chunk_sizek, &chunk_factor),
- lose_base = to_size_factor(result[i].lose_cover_sizek, &lose_factor),
- printk(KERN_INFO "%sgran_size: %ld%c \tchunk_size: %ld%c \t",
- result[i].bad?"*BAD*":" ",
- gran_base, gran_factor, chunk_base, chunk_factor);
- printk(KERN_CONT "num_reg: %d \tlose cover RAM: %s%ld%c\n",
- result[i].num_reg, result[i].bad?"-":"",
- lose_base, lose_factor);
if (!result[i].bad) {
set_var_mtrr_all(address_bits);
return 1;
}
printk(KERN_INFO "invalid mtrr_gran_size or mtrr_chunk_size, "
"will find optimal one\n");
- debug_print--;
- memset(result, 0, sizeof(result[0]));
}
i = 0;
memset(min_loss_pfn, 0xff, sizeof(min_loss_pfn));
memset(result, 0, sizeof(result));
for (gran_size = (1ULL<<16); gran_size < (1ULL<<32); gran_size <<= 1) {
- char gran_factor;
- unsigned long gran_base;
-
- if (debug_print)
- gran_base = to_size_factor(gran_size >> 10, &gran_factor);
for (chunk_size = gran_size; chunk_size < (1ULL<<32);
chunk_size <<= 1) {
- int num_reg;
- if (debug_print) {
- char chunk_factor;
- unsigned long chunk_base;
-
- chunk_base = to_size_factor(chunk_size>>10, &chunk_factor),
- printk(KERN_INFO "\n");
- printk(KERN_INFO "gran_size: %ld%c chunk_size: %ld%c \n",
- gran_base, gran_factor, chunk_base, chunk_factor);
- }
if (i >= NUM_RESULT)
continue;
- /* convert ranges to var ranges state */
- num_reg = x86_setup_var_mtrrs(range, nr_range,
- chunk_size, gran_size);
-
- /* we got new setting in range_state, check it */
- memset(range_new, 0, sizeof(range_new));
- nr_range_new = x86_get_mtrr_mem_range(range_new, 0,
- extra_remove_base, extra_remove_size);
- range_sums_new = sum_ranges(range_new, nr_range_new);
-
- result[i].chunk_sizek = chunk_size >> 10;
- result[i].gran_sizek = gran_size >> 10;
- result[i].num_reg = num_reg;
- if (range_sums < range_sums_new) {
- result[i].lose_cover_sizek =
- (range_sums_new - range_sums) << PSHIFT;
- result[i].bad = 1;
- } else
- result[i].lose_cover_sizek =
- (range_sums - range_sums_new) << PSHIFT;
-
- /* double check it */
- if (!result[i].bad && !result[i].lose_cover_sizek) {
- if (nr_range_new != nr_range ||
- memcmp(range, range_new, sizeof(range)))
- result[i].bad = 1;
+ mtrr_calc_range_state(chunk_size, gran_size,
+ extra_remove_base, extra_remove_size, i);
+ if (debug_print) {
+ mtrr_print_out_one_result(i);
+ printk(KERN_INFO "\n");
}
- if (!result[i].bad && (range_sums - range_sums_new <
- min_loss_pfn[num_reg])) {
- min_loss_pfn[num_reg] =
- range_sums - range_sums_new;
- }
i++;
}
}
- /* print out all */
- for (i = 0; i < NUM_RESULT; i++) {
- char gran_factor, chunk_factor, lose_factor;
- unsigned long gran_base, chunk_base, lose_base;
-
- gran_base = to_size_factor(result[i].gran_sizek, &gran_factor),
- chunk_base = to_size_factor(result[i].chunk_sizek, &chunk_factor),
- lose_base = to_size_factor(result[i].lose_cover_sizek, &lose_factor),
- printk(KERN_INFO "%sgran_size: %ld%c \tchunk_size: %ld%c \t",
- result[i].bad?"*BAD*":" ",
- gran_base, gran_factor, chunk_base, chunk_factor);
- printk(KERN_CONT "num_reg: %d \tlose cover RAM: %s%ld%c\n",
- result[i].num_reg, result[i].bad?"-":"",
- lose_base, lose_factor);
- }
-
/* try to find the optimal index */
- if (nr_mtrr_spare_reg >= num_var_ranges)
- nr_mtrr_spare_reg = num_var_ranges - 1;
- num_reg_good = -1;
- for (i = num_var_ranges - nr_mtrr_spare_reg; i > 0; i--) {
- if (!min_loss_pfn[i])
- num_reg_good = i;
- }
-
- index_good = -1;
- if (num_reg_good != -1) {
- for (i = 0; i < NUM_RESULT; i++) {
- if (!result[i].bad &&
- result[i].num_reg == num_reg_good &&
- !result[i].lose_cover_sizek) {
- index_good = i;
- break;
- }
- }
- }
+ index_good = mtrr_search_optimal_index();
if (index_good != -1) {
- char gran_factor, chunk_factor, lose_factor;
- unsigned long gran_base, chunk_base, lose_base;
-
printk(KERN_INFO "Found optimal setting for mtrr clean up\n");
i = index_good;
- gran_base = to_size_factor(result[i].gran_sizek, &gran_factor),
- chunk_base = to_size_factor(result[i].chunk_sizek, &chunk_factor),
- lose_base = to_size_factor(result[i].lose_cover_sizek, &lose_factor),
- printk(KERN_INFO "gran_size: %ld%c \tchunk_size: %ld%c \t",
- gran_base, gran_factor, chunk_base, chunk_factor);
- printk(KERN_CONT "num_reg: %d \tlose RAM: %ld%c\n",
- result[i].num_reg, lose_base, lose_factor);
+ mtrr_print_out_one_result(i);
+
/* convert ranges to var ranges state */
chunk_size = result[i].chunk_sizek;
chunk_size <<= 10;
gran_size = result[i].gran_sizek;
gran_size <<= 10;
- debug_print++;
x86_setup_var_mtrrs(range, nr_range, chunk_size, gran_size);
- debug_print--;
set_var_mtrr_all(address_bits);
+ printk(KERN_DEBUG "New variable MTRRs\n");
+ print_out_mtrr_range_state();
return 1;
+ } else {
+ /* print out all */
+ for (i = 0; i < NUM_RESULT; i++)
+ mtrr_print_out_one_result(i);
}
printk(KERN_INFO "mtrr_cleanup: can not find optimal value\n");
@@ -1562,7 +1559,6 @@ int __init mtrr_trim_uncached_memory(unsigned long end_pfn)
{
unsigned long i, base, size, highest_pfn = 0, def, dummy;
mtrr_type type;
- int nr_range;
u64 total_trim_size;
/* extra one for all 0 */
diff --git a/arch/x86/kernel/cpu/vmware.c b/arch/x86/kernel/cpu/vmware.c
new file mode 100644
index 00000000000..284c399e323
--- /dev/null
+++ b/arch/x86/kernel/cpu/vmware.c
@@ -0,0 +1,112 @@
+/*
+ * VMware Detection code.
+ *
+ * Copyright (C) 2008, VMware, Inc.
+ * Author : Alok N Kataria <akataria@vmware.com>
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#include <linux/dmi.h>
+#include <asm/div64.h>
+#include <asm/vmware.h>
+
+#define CPUID_VMWARE_INFO_LEAF 0x40000000
+#define VMWARE_HYPERVISOR_MAGIC 0x564D5868
+#define VMWARE_HYPERVISOR_PORT 0x5658
+
+#define VMWARE_PORT_CMD_GETVERSION 10
+#define VMWARE_PORT_CMD_GETHZ 45
+
+#define VMWARE_PORT(cmd, eax, ebx, ecx, edx) \
+ __asm__("inl (%%dx)" : \
+ "=a"(eax), "=c"(ecx), "=d"(edx), "=b"(ebx) : \
+ "0"(VMWARE_HYPERVISOR_MAGIC), \
+ "1"(VMWARE_PORT_CMD_##cmd), \
+ "2"(VMWARE_HYPERVISOR_PORT), "3"(UINT_MAX) : \
+ "memory");
+
+static inline int __vmware_platform(void)
+{
+ uint32_t eax, ebx, ecx, edx;
+ VMWARE_PORT(GETVERSION, eax, ebx, ecx, edx);
+ return eax != (uint32_t)-1 && ebx == VMWARE_HYPERVISOR_MAGIC;
+}
+
+static unsigned long __vmware_get_tsc_khz(void)
+{
+ uint64_t tsc_hz;
+ uint32_t eax, ebx, ecx, edx;
+
+ VMWARE_PORT(GETHZ, eax, ebx, ecx, edx);
+
+ if (ebx == UINT_MAX)
+ return 0;
+ tsc_hz = eax | (((uint64_t)ebx) << 32);
+ do_div(tsc_hz, 1000);
+ BUG_ON(tsc_hz >> 32);
+ return tsc_hz;
+}
+
+/*
+ * While checking the dmi string infomation, just checking the product
+ * serial key should be enough, as this will always have a VMware
+ * specific string when running under VMware hypervisor.
+ */
+int vmware_platform(void)
+{
+ if (cpu_has_hypervisor) {
+ unsigned int eax, ebx, ecx, edx;
+ char hyper_vendor_id[13];
+
+ cpuid(CPUID_VMWARE_INFO_LEAF, &eax, &ebx, &ecx, &edx);
+ memcpy(hyper_vendor_id + 0, &ebx, 4);
+ memcpy(hyper_vendor_id + 4, &ecx, 4);
+ memcpy(hyper_vendor_id + 8, &edx, 4);
+ hyper_vendor_id[12] = '\0';
+ if (!strcmp(hyper_vendor_id, "VMwareVMware"))
+ return 1;
+ } else if (dmi_available && dmi_name_in_serial("VMware") &&
+ __vmware_platform())
+ return 1;
+
+ return 0;
+}
+
+unsigned long vmware_get_tsc_khz(void)
+{
+ BUG_ON(!vmware_platform());
+ return __vmware_get_tsc_khz();
+}
+
+/*
+ * VMware hypervisor takes care of exporting a reliable TSC to the guest.
+ * Still, due to timing difference when running on virtual cpus, the TSC can
+ * be marked as unstable in some cases. For example, the TSC sync check at
+ * bootup can fail due to a marginal offset between vcpus' TSCs (though the
+ * TSCs do not drift from each other). Also, the ACPI PM timer clocksource
+ * is not suitable as a watchdog when running on a hypervisor because the
+ * kernel may miss a wrap of the counter if the vcpu is descheduled for a
+ * long time. To skip these checks at runtime we set these capability bits,
+ * so that the kernel could just trust the hypervisor with providing a
+ * reliable virtual TSC that is suitable for timekeeping.
+ */
+void __cpuinit vmware_set_feature_bits(struct cpuinfo_x86 *c)
+{
+ set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
+ set_cpu_cap(c, X86_FEATURE_TSC_RELIABLE);
+}
diff --git a/arch/x86/kernel/ds.c b/arch/x86/kernel/ds.c
index 19a8c2c0389..da91701a234 100644
--- a/arch/x86/kernel/ds.c
+++ b/arch/x86/kernel/ds.c
@@ -6,13 +6,13 @@
* precise-event based sampling (PEBS).
*
* It manages:
- * - per-thread and per-cpu allocation of BTS and PEBS
+ * - DS and BTS hardware configuration
* - buffer overflow handling (to be done)
* - buffer access
*
- * It assumes:
- * - get_task_struct on all traced tasks
- * - current is allowed to trace tasks
+ * It does not do:
+ * - security checking (is the caller allowed to trace the task)
+ * - buffer allocation (memory accounting)
*
*
* Copyright (C) 2007-2008 Intel Corporation.
@@ -34,15 +34,30 @@
* The configuration for a particular DS hardware implementation.
*/
struct ds_configuration {
- /* the size of the DS structure in bytes */
- unsigned char sizeof_ds;
- /* the size of one pointer-typed field in the DS structure in bytes;
- this covers the first 8 fields related to buffer management. */
+ /* the name of the configuration */
+ const char *name;
+ /* the size of one pointer-typed field in the DS structure and
+ in the BTS and PEBS buffers in bytes;
+ this covers the first 8 DS fields related to buffer management. */
unsigned char sizeof_field;
/* the size of a BTS/PEBS record in bytes */
unsigned char sizeof_rec[2];
+ /* a series of bit-masks to control various features indexed
+ * by enum ds_feature */
+ unsigned long ctl[dsf_ctl_max];
};
-static struct ds_configuration ds_cfg;
+static DEFINE_PER_CPU(struct ds_configuration, ds_cfg_array);
+
+#define ds_cfg per_cpu(ds_cfg_array, smp_processor_id())
+
+#define MAX_SIZEOF_DS (12 * 8) /* maximal size of a DS configuration */
+#define MAX_SIZEOF_BTS (3 * 8) /* maximal size of a BTS record */
+#define DS_ALIGNMENT (1 << 3) /* BTS and PEBS buffer alignment */
+
+#define BTS_CONTROL \
+ (ds_cfg.ctl[dsf_bts] | ds_cfg.ctl[dsf_bts_kernel] | ds_cfg.ctl[dsf_bts_user] |\
+ ds_cfg.ctl[dsf_bts_overflow])
+
/*
* A BTS or PEBS tracer.
@@ -61,6 +76,8 @@ struct ds_tracer {
struct bts_tracer {
/* the common DS part */
struct ds_tracer ds;
+ /* the trace including the DS configuration */
+ struct bts_trace trace;
/* buffer overflow notification function */
bts_ovfl_callback_t ovfl;
};
@@ -68,6 +85,8 @@ struct bts_tracer {
struct pebs_tracer {
/* the common DS part */
struct ds_tracer ds;
+ /* the trace including the DS configuration */
+ struct pebs_trace trace;
/* buffer overflow notification function */
pebs_ovfl_callback_t ovfl;
};
@@ -134,13 +153,11 @@ static inline void ds_set(unsigned char *base, enum ds_qualifier qual,
(*(unsigned long *)base) = value;
}
-#define DS_ALIGNMENT (1 << 3) /* BTS and PEBS buffer alignment */
-
/*
* Locking is done only for allocating BTS or PEBS resources.
*/
-static spinlock_t ds_lock = __SPIN_LOCK_UNLOCKED(ds_lock);
+static DEFINE_SPINLOCK(ds_lock);
/*
@@ -156,27 +173,32 @@ static spinlock_t ds_lock = __SPIN_LOCK_UNLOCKED(ds_lock);
* >0 number of per-thread tracers
* <0 number of per-cpu tracers
*
- * The below functions to get and put tracers and to check the
- * allocation type require the ds_lock to be held by the caller.
- *
* Tracers essentially gives the number of ds contexts for a certain
* type of allocation.
*/
-static long tracers;
+static atomic_t tracers = ATOMIC_INIT(0);
static inline void get_tracer(struct task_struct *task)
{
- tracers += (task ? 1 : -1);
+ if (task)
+ atomic_inc(&tracers);
+ else
+ atomic_dec(&tracers);
}
static inline void put_tracer(struct task_struct *task)
{
- tracers -= (task ? 1 : -1);
+ if (task)
+ atomic_dec(&tracers);
+ else
+ atomic_inc(&tracers);
}
static inline int check_tracer(struct task_struct *task)
{
- return (task ? (tracers >= 0) : (tracers <= 0));
+ return task ?
+ (atomic_read(&tracers) >= 0) :
+ (atomic_read(&tracers) <= 0);
}
@@ -190,46 +212,66 @@ static inline int check_tracer(struct task_struct *task)
* Contexts are use-counted. They are allocated on first access and
* deallocated when the last user puts the context.
*/
-static DEFINE_PER_CPU(struct ds_context *, system_context);
+struct ds_context {
+ /* pointer to the DS configuration; goes into MSR_IA32_DS_AREA */
+ unsigned char ds[MAX_SIZEOF_DS];
+ /* the owner of the BTS and PEBS configuration, respectively */
+ struct bts_tracer *bts_master;
+ struct pebs_tracer *pebs_master;
+ /* use count */
+ unsigned long count;
+ /* a pointer to the context location inside the thread_struct
+ * or the per_cpu context array */
+ struct ds_context **this;
+ /* a pointer to the task owning this context, or NULL, if the
+ * context is owned by a cpu */
+ struct task_struct *task;
+};
+
+static DEFINE_PER_CPU(struct ds_context *, system_context_array);
+
+#define system_context per_cpu(system_context_array, smp_processor_id())
-#define this_system_context per_cpu(system_context, smp_processor_id())
static inline struct ds_context *ds_get_context(struct task_struct *task)
{
struct ds_context **p_context =
- (task ? &task->thread.ds_ctx : &this_system_context);
- struct ds_context *context = *p_context;
+ (task ? &task->thread.ds_ctx : &system_context);
+ struct ds_context *context = NULL;
+ struct ds_context *new_context = NULL;
unsigned long irq;
- if (!context) {
- context = kzalloc(sizeof(*context), GFP_KERNEL);
- if (!context)
- return NULL;
+ /* Chances are small that we already have a context. */
+ new_context = kzalloc(sizeof(*new_context), GFP_KERNEL);
+ if (!new_context)
+ return NULL;
- spin_lock_irqsave(&ds_lock, irq);
+ spin_lock_irqsave(&ds_lock, irq);
- if (*p_context) {
- kfree(context);
+ context = *p_context;
+ if (!context) {
+ context = new_context;
- context = *p_context;
- } else {
- *p_context = context;
+ context->this = p_context;
+ context->task = task;
+ context->count = 0;
- context->this = p_context;
- context->task = task;
+ if (task)
+ set_tsk_thread_flag(task, TIF_DS_AREA_MSR);
- if (task)
- set_tsk_thread_flag(task, TIF_DS_AREA_MSR);
+ if (!task || (task == current))
+ wrmsrl(MSR_IA32_DS_AREA, (unsigned long)context->ds);
- if (!task || (task == current))
- wrmsrl(MSR_IA32_DS_AREA,
- (unsigned long)context->ds);
- }
- spin_unlock_irqrestore(&ds_lock, irq);
+ *p_context = context;
}
context->count++;
+ spin_unlock_irqrestore(&ds_lock, irq);
+
+ if (context != new_context)
+ kfree(new_context);
+
return context;
}
@@ -242,8 +284,10 @@ static inline void ds_put_context(struct ds_context *context)
spin_lock_irqsave(&ds_lock, irq);
- if (--context->count)
- goto out;
+ if (--context->count) {
+ spin_unlock_irqrestore(&ds_lock, irq);
+ return;
+ }
*(context->this) = NULL;
@@ -253,14 +297,14 @@ static inline void ds_put_context(struct ds_context *context)
if (!context->task || (context->task == current))
wrmsrl(MSR_IA32_DS_AREA, 0);
- kfree(context);
- out:
spin_unlock_irqrestore(&ds_lock, irq);
+
+ kfree(context);
}
/*
- * Handle a buffer overflow
+ * Call the tracer's callback on a buffer overflow.
*
* context: the ds context
* qual: the buffer type
@@ -268,30 +312,247 @@ static inline void ds_put_context(struct ds_context *context)
static void ds_overflow(struct ds_context *context, enum ds_qualifier qual)
{
switch (qual) {
- case ds_bts: {
- struct bts_tracer *tracer =
- container_of(context->owner[qual],
- struct bts_tracer, ds);
- if (tracer->ovfl)
- tracer->ovfl(tracer);
- }
+ case ds_bts:
+ if (context->bts_master &&
+ context->bts_master->ovfl)
+ context->bts_master->ovfl(context->bts_master);
break;
- case ds_pebs: {
- struct pebs_tracer *tracer =
- container_of(context->owner[qual],
- struct pebs_tracer, ds);
- if (tracer->ovfl)
- tracer->ovfl(tracer);
+ case ds_pebs:
+ if (context->pebs_master &&
+ context->pebs_master->ovfl)
+ context->pebs_master->ovfl(context->pebs_master);
+ break;
+ }
+}
+
+
+/*
+ * Write raw data into the BTS or PEBS buffer.
+ *
+ * The remainder of any partially written record is zeroed out.
+ *
+ * context: the DS context
+ * qual: the buffer type
+ * record: the data to write
+ * size: the size of the data
+ */
+static int ds_write(struct ds_context *context, enum ds_qualifier qual,
+ const void *record, size_t size)
+{
+ int bytes_written = 0;
+
+ if (!record)
+ return -EINVAL;
+
+ while (size) {
+ unsigned long base, index, end, write_end, int_th;
+ unsigned long write_size, adj_write_size;
+
+ /*
+ * write as much as possible without producing an
+ * overflow interrupt.
+ *
+ * interrupt_threshold must either be
+ * - bigger than absolute_maximum or
+ * - point to a record between buffer_base and absolute_maximum
+ *
+ * index points to a valid record.
+ */
+ base = ds_get(context->ds, qual, ds_buffer_base);
+ index = ds_get(context->ds, qual, ds_index);
+ end = ds_get(context->ds, qual, ds_absolute_maximum);
+ int_th = ds_get(context->ds, qual, ds_interrupt_threshold);
+
+ write_end = min(end, int_th);
+
+ /* if we are already beyond the interrupt threshold,
+ * we fill the entire buffer */
+ if (write_end <= index)
+ write_end = end;
+
+ if (write_end <= index)
+ break;
+
+ write_size = min((unsigned long) size, write_end - index);
+ memcpy((void *)index, record, write_size);
+
+ record = (const char *)record + write_size;
+ size -= write_size;
+ bytes_written += write_size;
+
+ adj_write_size = write_size / ds_cfg.sizeof_rec[qual];
+ adj_write_size *= ds_cfg.sizeof_rec[qual];
+
+ /* zero out trailing bytes */
+ memset((char *)index + write_size, 0,
+ adj_write_size - write_size);
+ index += adj_write_size;
+
+ if (index >= end)
+ index = base;
+ ds_set(context->ds, qual, ds_index, index);
+
+ if (index >= int_th)
+ ds_overflow(context, qual);
+ }
+
+ return bytes_written;
+}
+
+
+/*
+ * Branch Trace Store (BTS) uses the following format. Different
+ * architectures vary in the size of those fields.
+ * - source linear address
+ * - destination linear address
+ * - flags
+ *
+ * Later architectures use 64bit pointers throughout, whereas earlier
+ * architectures use 32bit pointers in 32bit mode.
+ *
+ * We compute the base address for the first 8 fields based on:
+ * - the field size stored in the DS configuration
+ * - the relative field position
+ *
+ * In order to store additional information in the BTS buffer, we use
+ * a special source address to indicate that the record requires
+ * special interpretation.
+ *
+ * Netburst indicated via a bit in the flags field whether the branch
+ * was predicted; this is ignored.
+ *
+ * We use two levels of abstraction:
+ * - the raw data level defined here
+ * - an arch-independent level defined in ds.h
+ */
+
+enum bts_field {
+ bts_from,
+ bts_to,
+ bts_flags,
+
+ bts_qual = bts_from,
+ bts_jiffies = bts_to,
+ bts_pid = bts_flags,
+
+ bts_qual_mask = (bts_qual_max - 1),
+ bts_escape = ((unsigned long)-1 & ~bts_qual_mask)
+};
+
+static inline unsigned long bts_get(const char *base, enum bts_field field)
+{
+ base += (ds_cfg.sizeof_field * field);
+ return *(unsigned long *)base;
+}
+
+static inline void bts_set(char *base, enum bts_field field, unsigned long val)
+{
+ base += (ds_cfg.sizeof_field * field);;
+ (*(unsigned long *)base) = val;
+}
+
+
+/*
+ * The raw BTS data is architecture dependent.
+ *
+ * For higher-level users, we give an arch-independent view.
+ * - ds.h defines struct bts_struct
+ * - bts_read translates one raw bts record into a bts_struct
+ * - bts_write translates one bts_struct into the raw format and
+ * writes it into the top of the parameter tracer's buffer.
+ *
+ * return: bytes read/written on success; -Eerrno, otherwise
+ */
+static int bts_read(struct bts_tracer *tracer, const void *at,
+ struct bts_struct *out)
+{
+ if (!tracer)
+ return -EINVAL;
+
+ if (at < tracer->trace.ds.begin)
+ return -EINVAL;
+
+ if (tracer->trace.ds.end < (at + tracer->trace.ds.size))
+ return -EINVAL;
+
+ memset(out, 0, sizeof(*out));
+ if ((bts_get(at, bts_qual) & ~bts_qual_mask) == bts_escape) {
+ out->qualifier = (bts_get(at, bts_qual) & bts_qual_mask);
+ out->variant.timestamp.jiffies = bts_get(at, bts_jiffies);
+ out->variant.timestamp.pid = bts_get(at, bts_pid);
+ } else {
+ out->qualifier = bts_branch;
+ out->variant.lbr.from = bts_get(at, bts_from);
+ out->variant.lbr.to = bts_get(at, bts_to);
+
+ if (!out->variant.lbr.from && !out->variant.lbr.to)
+ out->qualifier = bts_invalid;
}
+
+ return ds_cfg.sizeof_rec[ds_bts];
+}
+
+static int bts_write(struct bts_tracer *tracer, const struct bts_struct *in)
+{
+ unsigned char raw[MAX_SIZEOF_BTS];
+
+ if (!tracer)
+ return -EINVAL;
+
+ if (MAX_SIZEOF_BTS < ds_cfg.sizeof_rec[ds_bts])
+ return -EOVERFLOW;
+
+ switch (in->qualifier) {
+ case bts_invalid:
+ bts_set(raw, bts_from, 0);
+ bts_set(raw, bts_to, 0);
+ bts_set(raw, bts_flags, 0);
+ break;
+ case bts_branch:
+ bts_set(raw, bts_from, in->variant.lbr.from);
+ bts_set(raw, bts_to, in->variant.lbr.to);
+ bts_set(raw, bts_flags, 0);
break;
+ case bts_task_arrives:
+ case bts_task_departs:
+ bts_set(raw, bts_qual, (bts_escape | in->qualifier));
+ bts_set(raw, bts_jiffies, in->variant.timestamp.jiffies);
+ bts_set(raw, bts_pid, in->variant.timestamp.pid);
+ break;
+ default:
+ return -EINVAL;
}
+
+ return ds_write(tracer->ds.context, ds_bts, raw,
+ ds_cfg.sizeof_rec[ds_bts]);
}
-static void ds_install_ds_config(struct ds_context *context,
- enum ds_qualifier qual,
- void *base, size_t size, size_t ith)
+static void ds_write_config(struct ds_context *context,
+ struct ds_trace *cfg, enum ds_qualifier qual)
{
+ unsigned char *ds = context->ds;
+
+ ds_set(ds, qual, ds_buffer_base, (unsigned long)cfg->begin);
+ ds_set(ds, qual, ds_index, (unsigned long)cfg->top);
+ ds_set(ds, qual, ds_absolute_maximum, (unsigned long)cfg->end);
+ ds_set(ds, qual, ds_interrupt_threshold, (unsigned long)cfg->ith);
+}
+
+static void ds_read_config(struct ds_context *context,
+ struct ds_trace *cfg, enum ds_qualifier qual)
+{
+ unsigned char *ds = context->ds;
+
+ cfg->begin = (void *)ds_get(ds, qual, ds_buffer_base);
+ cfg->top = (void *)ds_get(ds, qual, ds_index);
+ cfg->end = (void *)ds_get(ds, qual, ds_absolute_maximum);
+ cfg->ith = (void *)ds_get(ds, qual, ds_interrupt_threshold);
+}
+
+static void ds_init_ds_trace(struct ds_trace *trace, enum ds_qualifier qual,
+ void *base, size_t size, size_t ith,
+ unsigned int flags) {
unsigned long buffer, adj;
/* adjust the buffer address and size to meet alignment
@@ -308,32 +569,30 @@ static void ds_install_ds_config(struct ds_context *context,
buffer += adj;
size -= adj;
- size /= ds_cfg.sizeof_rec[qual];
- size *= ds_cfg.sizeof_rec[qual];
+ trace->n = size / ds_cfg.sizeof_rec[qual];
+ trace->size = ds_cfg.sizeof_rec[qual];
- ds_set(context->ds, qual, ds_buffer_base, buffer);
- ds_set(context->ds, qual, ds_index, buffer);
- ds_set(context->ds, qual, ds_absolute_maximum, buffer + size);
+ size = (trace->n * trace->size);
+ trace->begin = (void *)buffer;
+ trace->top = trace->begin;
+ trace->end = (void *)(buffer + size);
/* The value for 'no threshold' is -1, which will set the
* threshold outside of the buffer, just like we want it.
*/
- ds_set(context->ds, qual,
- ds_interrupt_threshold, buffer + size - ith);
+ trace->ith = (void *)(buffer + size - ith);
+
+ trace->flags = flags;
}
-static int ds_request(struct ds_tracer *tracer, enum ds_qualifier qual,
- struct task_struct *task,
- void *base, size_t size, size_t th)
+
+static int ds_request(struct ds_tracer *tracer, struct ds_trace *trace,
+ enum ds_qualifier qual, struct task_struct *task,
+ void *base, size_t size, size_t th, unsigned int flags)
{
struct ds_context *context;
- unsigned long irq;
int error;
- error = -EOPNOTSUPP;
- if (!ds_cfg.sizeof_ds)
- goto out;
-
error = -EINVAL;
if (!base)
goto out;
@@ -360,43 +619,26 @@ static int ds_request(struct ds_tracer *tracer, enum ds_qualifier qual,
goto out;
tracer->context = context;
+ ds_init_ds_trace(trace, qual, base, size, th, flags);
- spin_lock_irqsave(&ds_lock, irq);
-
- error = -EPERM;
- if (!check_tracer(task))
- goto out_unlock;
- get_tracer(task);
-
- error = -EPERM;
- if (context->owner[qual])
- goto out_put_tracer;
- context->owner[qual] = tracer;
-
- spin_unlock_irqrestore(&ds_lock, irq);
-
-
- ds_install_ds_config(context, qual, base, size, th);
-
- return 0;
-
- out_put_tracer:
- put_tracer(task);
- out_unlock:
- spin_unlock_irqrestore(&ds_lock, irq);
- ds_put_context(context);
- tracer->context = NULL;
+ error = 0;
out:
return error;
}
struct bts_tracer *ds_request_bts(struct task_struct *task,
void *base, size_t size,
- bts_ovfl_callback_t ovfl, size_t th)
+ bts_ovfl_callback_t ovfl, size_t th,
+ unsigned int flags)
{
struct bts_tracer *tracer;
+ unsigned long irq;
int error;
+ error = -EOPNOTSUPP;
+ if (!ds_cfg.ctl[dsf_bts])
+ goto out;
+
/* buffer overflow notification is not yet implemented */
error = -EOPNOTSUPP;
if (ovfl)
@@ -408,12 +650,40 @@ struct bts_tracer *ds_request_bts(struct task_struct *task,
goto out;
tracer->ovfl = ovfl;
- error = ds_request(&tracer->ds, ds_bts, task, base, size, th);
+ error = ds_request(&tracer->ds, &tracer->trace.ds,
+ ds_bts, task, base, size, th, flags);
if (error < 0)
goto out_tracer;
+
+ spin_lock_irqsave(&ds_lock, irq);
+
+ error = -EPERM;
+ if (!check_tracer(task))
+ goto out_unlock;
+ get_tracer(task);
+
+ error = -EPERM;
+ if (tracer->ds.context->bts_master)
+ goto out_put_tracer;
+ tracer->ds.context->bts_master = tracer;
+
+ spin_unlock_irqrestore(&ds_lock, irq);
+
+
+ tracer->trace.read = bts_read;
+ tracer->trace.write = bts_write;
+
+ ds_write_config(tracer->ds.context, &tracer->trace.ds, ds_bts);
+ ds_resume_bts(tracer);
+
return tracer;
+ out_put_tracer:
+ put_tracer(task);
+ out_unlock:
+ spin_unlock_irqrestore(&ds_lock, irq);
+ ds_put_context(tracer->ds.context);
out_tracer:
kfree(tracer);
out:
@@ -422,9 +692,11 @@ struct bts_tracer *ds_request_bts(struct task_struct *task,
struct pebs_tracer *ds_request_pebs(struct task_struct *task,
void *base, size_t size,
- pebs_ovfl_callback_t ovfl, size_t th)
+ pebs_ovfl_callback_t ovfl, size_t th,
+ unsigned int flags)
{
struct pebs_tracer *tracer;
+ unsigned long irq;
int error;
/* buffer overflow notification is not yet implemented */
@@ -438,300 +710,171 @@ struct pebs_tracer *ds_request_pebs(struct task_struct *task,
goto out;
tracer->ovfl = ovfl;
- error = ds_request(&tracer->ds, ds_pebs, task, base, size, th);
+ error = ds_request(&tracer->ds, &tracer->trace.ds,
+ ds_pebs, task, base, size, th, flags);
if (error < 0)
goto out_tracer;
+ spin_lock_irqsave(&ds_lock, irq);
+
+ error = -EPERM;
+ if (!check_tracer(task))
+ goto out_unlock;
+ get_tracer(task);
+
+ error = -EPERM;
+ if (tracer->ds.context->pebs_master)
+ goto out_put_tracer;
+ tracer->ds.context->pebs_master = tracer;
+
+ spin_unlock_irqrestore(&ds_lock, irq);
+
+ ds_write_config(tracer->ds.context, &tracer->trace.ds, ds_bts);
+ ds_resume_pebs(tracer);
+
return tracer;
+ out_put_tracer:
+ put_tracer(task);
+ out_unlock:
+ spin_unlock_irqrestore(&ds_lock, irq);
+ ds_put_context(tracer->ds.context);
out_tracer:
kfree(tracer);
out:
return ERR_PTR(error);
}
-static void ds_release(struct ds_tracer *tracer, enum ds_qualifier qual)
-{
- BUG_ON(tracer->context->owner[qual] != tracer);
- tracer->context->owner[qual] = NULL;
-
- put_tracer(tracer->context->task);
- ds_put_context(tracer->context);
-}
-
-int ds_release_bts(struct bts_tracer *tracer)
+void ds_release_bts(struct bts_tracer *tracer)
{
if (!tracer)
- return -EINVAL;
+ return;
- ds_release(&tracer->ds, ds_bts);
- kfree(tracer);
+ ds_suspend_bts(tracer);
- return 0;
-}
+ WARN_ON_ONCE(tracer->ds.context->bts_master != tracer);
+ tracer->ds.context->bts_master = NULL;
-int ds_release_pebs(struct pebs_tracer *tracer)
-{
- if (!tracer)
- return -EINVAL;
+ put_tracer(tracer->ds.context->task);
+ ds_put_context(tracer->ds.context);
- ds_release(&tracer->ds, ds_pebs);
kfree(tracer);
-
- return 0;
}
-static size_t ds_get_index(struct ds_context *context, enum ds_qualifier qual)
+void ds_suspend_bts(struct bts_tracer *tracer)
{
- unsigned long base, index;
-
- base = ds_get(context->ds, qual, ds_buffer_base);
- index = ds_get(context->ds, qual, ds_index);
-
- return (index - base) / ds_cfg.sizeof_rec[qual];
-}
+ struct task_struct *task;
-int ds_get_bts_index(struct bts_tracer *tracer, size_t *pos)
-{
if (!tracer)
- return -EINVAL;
-
- if (!pos)
- return -EINVAL;
-
- *pos = ds_get_index(tracer->ds.context, ds_bts);
-
- return 0;
-}
+ return;
-int ds_get_pebs_index(struct pebs_tracer *tracer, size_t *pos)
-{
- if (!tracer)
- return -EINVAL;
+ task = tracer->ds.context->task;
- if (!pos)
- return -EINVAL;
+ if (!task || (task == current))
+ update_debugctlmsr(get_debugctlmsr() & ~BTS_CONTROL);
- *pos = ds_get_index(tracer->ds.context, ds_pebs);
+ if (task) {
+ task->thread.debugctlmsr &= ~BTS_CONTROL;
- return 0;
+ if (!task->thread.debugctlmsr)
+ clear_tsk_thread_flag(task, TIF_DEBUGCTLMSR);
+ }
}
-static size_t ds_get_end(struct ds_context *context, enum ds_qualifier qual)
+void ds_resume_bts(struct bts_tracer *tracer)
{
- unsigned long base, max;
+ struct task_struct *task;
+ unsigned long control;
- base = ds_get(context->ds, qual, ds_buffer_base);
- max = ds_get(context->ds, qual, ds_absolute_maximum);
-
- return (max - base) / ds_cfg.sizeof_rec[qual];
-}
-
-int ds_get_bts_end(struct bts_tracer *tracer, size_t *pos)
-{
if (!tracer)
- return -EINVAL;
-
- if (!pos)
- return -EINVAL;
-
- *pos = ds_get_end(tracer->ds.context, ds_bts);
-
- return 0;
-}
-
-int ds_get_pebs_end(struct pebs_tracer *tracer, size_t *pos)
-{
- if (!tracer)
- return -EINVAL;
-
- if (!pos)
- return -EINVAL;
-
- *pos = ds_get_end(tracer->ds.context, ds_pebs);
-
- return 0;
-}
-
-static int ds_access(struct ds_context *context, enum ds_qualifier qual,
- size_t index, const void **record)
-{
- unsigned long base, idx;
-
- if (!record)
- return -EINVAL;
-
- base = ds_get(context->ds, qual, ds_buffer_base);
- idx = base + (index * ds_cfg.sizeof_rec[qual]);
-
- if (idx > ds_get(context->ds, qual, ds_absolute_maximum))
- return -EINVAL;
+ return;
- *record = (const void *)idx;
+ task = tracer->ds.context->task;
- return ds_cfg.sizeof_rec[qual];
-}
+ control = ds_cfg.ctl[dsf_bts];
+ if (!(tracer->trace.ds.flags & BTS_KERNEL))
+ control |= ds_cfg.ctl[dsf_bts_kernel];
+ if (!(tracer->trace.ds.flags & BTS_USER))
+ control |= ds_cfg.ctl[dsf_bts_user];
-int ds_access_bts(struct bts_tracer *tracer, size_t index,
- const void **record)
-{
- if (!tracer)
- return -EINVAL;
+ if (task) {
+ task->thread.debugctlmsr |= control;
+ set_tsk_thread_flag(task, TIF_DEBUGCTLMSR);
+ }
- return ds_access(tracer->ds.context, ds_bts, index, record);
+ if (!task || (task == current))
+ update_debugctlmsr(get_debugctlmsr() | control);
}
-int ds_access_pebs(struct pebs_tracer *tracer, size_t index,
- const void **record)
+void ds_release_pebs(struct pebs_tracer *tracer)
{
if (!tracer)
- return -EINVAL;
-
- return ds_access(tracer->ds.context, ds_pebs, index, record);
-}
-
-static int ds_write(struct ds_context *context, enum ds_qualifier qual,
- const void *record, size_t size)
-{
- int bytes_written = 0;
-
- if (!record)
- return -EINVAL;
-
- while (size) {
- unsigned long base, index, end, write_end, int_th;
- unsigned long write_size, adj_write_size;
-
- /*
- * write as much as possible without producing an
- * overflow interrupt.
- *
- * interrupt_threshold must either be
- * - bigger than absolute_maximum or
- * - point to a record between buffer_base and absolute_maximum
- *
- * index points to a valid record.
- */
- base = ds_get(context->ds, qual, ds_buffer_base);
- index = ds_get(context->ds, qual, ds_index);
- end = ds_get(context->ds, qual, ds_absolute_maximum);
- int_th = ds_get(context->ds, qual, ds_interrupt_threshold);
-
- write_end = min(end, int_th);
-
- /* if we are already beyond the interrupt threshold,
- * we fill the entire buffer */
- if (write_end <= index)
- write_end = end;
-
- if (write_end <= index)
- break;
-
- write_size = min((unsigned long) size, write_end - index);
- memcpy((void *)index, record, write_size);
-
- record = (const char *)record + write_size;
- size -= write_size;
- bytes_written += write_size;
-
- adj_write_size = write_size / ds_cfg.sizeof_rec[qual];
- adj_write_size *= ds_cfg.sizeof_rec[qual];
-
- /* zero out trailing bytes */
- memset((char *)index + write_size, 0,
- adj_write_size - write_size);
- index += adj_write_size;
-
- if (index >= end)
- index = base;
- ds_set(context->ds, qual, ds_index, index);
+ return;
- if (index >= int_th)
- ds_overflow(context, qual);
- }
+ ds_suspend_pebs(tracer);
- return bytes_written;
-}
+ WARN_ON_ONCE(tracer->ds.context->pebs_master != tracer);
+ tracer->ds.context->pebs_master = NULL;
-int ds_write_bts(struct bts_tracer *tracer, const void *record, size_t size)
-{
- if (!tracer)
- return -EINVAL;
+ put_tracer(tracer->ds.context->task);
+ ds_put_context(tracer->ds.context);
- return ds_write(tracer->ds.context, ds_bts, record, size);
+ kfree(tracer);
}
-int ds_write_pebs(struct pebs_tracer *tracer, const void *record, size_t size)
+void ds_suspend_pebs(struct pebs_tracer *tracer)
{
- if (!tracer)
- return -EINVAL;
- return ds_write(tracer->ds.context, ds_pebs, record, size);
}
-static void ds_reset_or_clear(struct ds_context *context,
- enum ds_qualifier qual, int clear)
+void ds_resume_pebs(struct pebs_tracer *tracer)
{
- unsigned long base, end;
-
- base = ds_get(context->ds, qual, ds_buffer_base);
- end = ds_get(context->ds, qual, ds_absolute_maximum);
- if (clear)
- memset((void *)base, 0, end - base);
-
- ds_set(context->ds, qual, ds_index, base);
}
-int ds_reset_bts(struct bts_tracer *tracer)
+const struct bts_trace *ds_read_bts(struct bts_tracer *tracer)
{
if (!tracer)
- return -EINVAL;
+ return NULL;
- ds_reset_or_clear(tracer->ds.context, ds_bts, /* clear = */ 0);
-
- return 0;
+ ds_read_config(tracer->ds.context, &tracer->trace.ds, ds_bts);
+ return &tracer->trace;
}
-int ds_reset_pebs(struct pebs_tracer *tracer)
+const struct pebs_trace *ds_read_pebs(struct pebs_tracer *tracer)
{
if (!tracer)
- return -EINVAL;
+ return NULL;
- ds_reset_or_clear(tracer->ds.context, ds_pebs, /* clear = */ 0);
+ ds_read_config(tracer->ds.context, &tracer->trace.ds, ds_pebs);
+ tracer->trace.reset_value =
+ *(u64 *)(tracer->ds.context->ds + (ds_cfg.sizeof_field * 8));
- return 0;
+ return &tracer->trace;
}
-int ds_clear_bts(struct bts_tracer *tracer)
+int ds_reset_bts(struct bts_tracer *tracer)
{
if (!tracer)
return -EINVAL;
- ds_reset_or_clear(tracer->ds.context, ds_bts, /* clear = */ 1);
-
- return 0;
-}
-
-int ds_clear_pebs(struct pebs_tracer *tracer)
-{
- if (!tracer)
- return -EINVAL;
+ tracer->trace.ds.top = tracer->trace.ds.begin;
- ds_reset_or_clear(tracer->ds.context, ds_pebs, /* clear = */ 1);
+ ds_set(tracer->ds.context->ds, ds_bts, ds_index,
+ (unsigned long)tracer->trace.ds.top);
return 0;
}
-int ds_get_pebs_reset(struct pebs_tracer *tracer, u64 *value)
+int ds_reset_pebs(struct pebs_tracer *tracer)
{
if (!tracer)
return -EINVAL;
- if (!value)
- return -EINVAL;
+ tracer->trace.ds.top = tracer->trace.ds.begin;
- *value = *(u64 *)(tracer->ds.context->ds + (ds_cfg.sizeof_field * 8));
+ ds_set(tracer->ds.context->ds, ds_bts, ds_index,
+ (unsigned long)tracer->trace.ds.top);
return 0;
}
@@ -746,35 +889,59 @@ int ds_set_pebs_reset(struct pebs_tracer *tracer, u64 value)
return 0;
}
-static const struct ds_configuration ds_cfg_var = {
- .sizeof_ds = sizeof(long) * 12,
- .sizeof_field = sizeof(long),
- .sizeof_rec[ds_bts] = sizeof(long) * 3,
+static const struct ds_configuration ds_cfg_netburst = {
+ .name = "netburst",
+ .ctl[dsf_bts] = (1 << 2) | (1 << 3),
+ .ctl[dsf_bts_kernel] = (1 << 5),
+ .ctl[dsf_bts_user] = (1 << 6),
+
+ .sizeof_field = sizeof(long),
+ .sizeof_rec[ds_bts] = sizeof(long) * 3,
#ifdef __i386__
- .sizeof_rec[ds_pebs] = sizeof(long) * 10
+ .sizeof_rec[ds_pebs] = sizeof(long) * 10,
#else
- .sizeof_rec[ds_pebs] = sizeof(long) * 18
+ .sizeof_rec[ds_pebs] = sizeof(long) * 18,
#endif
};
-static const struct ds_configuration ds_cfg_64 = {
- .sizeof_ds = 8 * 12,
- .sizeof_field = 8,
- .sizeof_rec[ds_bts] = 8 * 3,
+static const struct ds_configuration ds_cfg_pentium_m = {
+ .name = "pentium m",
+ .ctl[dsf_bts] = (1 << 6) | (1 << 7),
+
+ .sizeof_field = sizeof(long),
+ .sizeof_rec[ds_bts] = sizeof(long) * 3,
#ifdef __i386__
- .sizeof_rec[ds_pebs] = 8 * 10
+ .sizeof_rec[ds_pebs] = sizeof(long) * 10,
#else
- .sizeof_rec[ds_pebs] = 8 * 18
+ .sizeof_rec[ds_pebs] = sizeof(long) * 18,
#endif
};
+static const struct ds_configuration ds_cfg_core2 = {
+ .name = "core 2",
+ .ctl[dsf_bts] = (1 << 6) | (1 << 7),
+ .ctl[dsf_bts_kernel] = (1 << 9),
+ .ctl[dsf_bts_user] = (1 << 10),
+
+ .sizeof_field = 8,
+ .sizeof_rec[ds_bts] = 8 * 3,
+ .sizeof_rec[ds_pebs] = 8 * 18,
+};
-static inline void
+static void
ds_configure(const struct ds_configuration *cfg)
{
+ memset(&ds_cfg, 0, sizeof(ds_cfg));
ds_cfg = *cfg;
- printk(KERN_INFO "DS available\n");
+ printk(KERN_INFO "[ds] using %s configuration\n", ds_cfg.name);
+
+ if (!cpu_has_bts) {
+ ds_cfg.ctl[dsf_bts] = 0;
+ printk(KERN_INFO "[ds] bts not available\n");
+ }
+ if (!cpu_has_pebs)
+ printk(KERN_INFO "[ds] pebs not available\n");
- BUG_ON(MAX_SIZEOF_DS < ds_cfg.sizeof_ds);
+ WARN_ON_ONCE(MAX_SIZEOF_DS < (12 * ds_cfg.sizeof_field));
}
void __cpuinit ds_init_intel(struct cpuinfo_x86 *c)
@@ -787,10 +954,10 @@ void __cpuinit ds_init_intel(struct cpuinfo_x86 *c)
break;
case 0xD:
case 0xE: /* Pentium M */
- ds_configure(&ds_cfg_var);
+ ds_configure(&ds_cfg_pentium_m);
break;
default: /* Core2, Atom, ... */
- ds_configure(&ds_cfg_64);
+ ds_configure(&ds_cfg_core2);
break;
}
break;
@@ -799,7 +966,7 @@ void __cpuinit ds_init_intel(struct cpuinfo_x86 *c)
case 0x0:
case 0x1:
case 0x2: /* Netburst */
- ds_configure(&ds_cfg_var);
+ ds_configure(&ds_cfg_netburst);
break;
default:
/* sorry, don't know about them */
@@ -812,14 +979,52 @@ void __cpuinit ds_init_intel(struct cpuinfo_x86 *c)
}
}
-void ds_free(struct ds_context *context)
+/*
+ * Change the DS configuration from tracing prev to tracing next.
+ */
+void ds_switch_to(struct task_struct *prev, struct task_struct *next)
{
- /* This is called when the task owning the parameter context
- * is dying. There should not be any user of that context left
- * to disturb us, anymore. */
- unsigned long leftovers = context->count;
- while (leftovers--) {
- put_tracer(context->task);
- ds_put_context(context);
+ struct ds_context *prev_ctx = prev->thread.ds_ctx;
+ struct ds_context *next_ctx = next->thread.ds_ctx;
+
+ if (prev_ctx) {
+ update_debugctlmsr(0);
+
+ if (prev_ctx->bts_master &&
+ (prev_ctx->bts_master->trace.ds.flags & BTS_TIMESTAMPS)) {
+ struct bts_struct ts = {
+ .qualifier = bts_task_departs,
+ .variant.timestamp.jiffies = jiffies_64,
+ .variant.timestamp.pid = prev->pid
+ };
+ bts_write(prev_ctx->bts_master, &ts);
+ }
+ }
+
+ if (next_ctx) {
+ if (next_ctx->bts_master &&
+ (next_ctx->bts_master->trace.ds.flags & BTS_TIMESTAMPS)) {
+ struct bts_struct ts = {
+ .qualifier = bts_task_arrives,
+ .variant.timestamp.jiffies = jiffies_64,
+ .variant.timestamp.pid = next->pid
+ };
+ bts_write(next_ctx->bts_master, &ts);
+ }
+
+ wrmsrl(MSR_IA32_DS_AREA, (unsigned long)next_ctx->ds);
}
+
+ update_debugctlmsr(next->thread.debugctlmsr);
+}
+
+void ds_copy_thread(struct task_struct *tsk, struct task_struct *father)
+{
+ clear_tsk_thread_flag(tsk, TIF_DS_AREA_MSR);
+ tsk->thread.ds_ctx = NULL;
+}
+
+void ds_exit_thread(struct task_struct *tsk)
+{
+ WARN_ON(tsk->thread.ds_ctx);
}
diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index 7aafeb5263e..65a13943e09 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -677,22 +677,6 @@ struct early_res {
};
static struct early_res early_res[MAX_EARLY_RES] __initdata = {
{ 0, PAGE_SIZE, "BIOS data page" }, /* BIOS data page */
-#if defined(CONFIG_X86_64) && defined(CONFIG_X86_TRAMPOLINE)
- { TRAMPOLINE_BASE, TRAMPOLINE_BASE + 2 * PAGE_SIZE, "TRAMPOLINE" },
-#endif
-#if defined(CONFIG_X86_32) && defined(CONFIG_SMP)
- /*
- * But first pinch a few for the stack/trampoline stuff
- * FIXME: Don't need the extra page at 4K, but need to fix
- * trampoline before removing it. (see the GDT stuff)
- */
- { PAGE_SIZE, PAGE_SIZE + PAGE_SIZE, "EX TRAMPOLINE" },
- /*
- * Has to be in very low memory so we can execute
- * real-mode AP code.
- */
- { TRAMPOLINE_BASE, TRAMPOLINE_BASE + PAGE_SIZE, "TRAMPOLINE" },
-#endif
{}
};
diff --git a/arch/x86/kernel/early-quirks.c b/arch/x86/kernel/early-quirks.c
index 1b894b72c0f..744aa7fc49d 100644
--- a/arch/x86/kernel/early-quirks.c
+++ b/arch/x86/kernel/early-quirks.c
@@ -17,6 +17,7 @@
#include <asm/io_apic.h>
#include <asm/apic.h>
#include <asm/iommu.h>
+#include <asm/gart.h>
static void __init fix_hypertransport_config(int num, int slot, int func)
{
diff --git a/arch/x86/kernel/early_printk.c b/arch/x86/kernel/early_printk.c
index 34ad997d383..23b138e31e9 100644
--- a/arch/x86/kernel/early_printk.c
+++ b/arch/x86/kernel/early_printk.c
@@ -875,49 +875,6 @@ static struct console early_dbgp_console = {
};
#endif
-/* Console interface to a host file on AMD's SimNow! */
-
-static int simnow_fd;
-
-enum {
- MAGIC1 = 0xBACCD00A,
- MAGIC2 = 0xCA110000,
- XOPEN = 5,
- XWRITE = 4,
-};
-
-static noinline long simnow(long cmd, long a, long b, long c)
-{
- long ret;
-
- asm volatile("cpuid" :
- "=a" (ret) :
- "b" (a), "c" (b), "d" (c), "0" (MAGIC1), "D" (cmd + MAGIC2));
- return ret;
-}
-
-static void __init simnow_init(char *str)
-{
- char *fn = "klog";
-
- if (*str == '=')
- fn = ++str;
- /* error ignored */
- simnow_fd = simnow(XOPEN, (unsigned long)fn, O_WRONLY|O_APPEND|O_CREAT, 0644);
-}
-
-static void simnow_write(struct console *con, const char *s, unsigned n)
-{
- simnow(XWRITE, simnow_fd, (unsigned long)s, n);
-}
-
-static struct console simnow_console = {
- .name = "simnow",
- .write = simnow_write,
- .flags = CON_PRINTBUFFER,
- .index = -1,
-};
-
/* Direct interface for emergencies */
static struct console *early_console = &early_vga_console;
static int __initdata early_console_initialized;
@@ -960,10 +917,6 @@ static int __init setup_early_printk(char *buf)
max_ypos = boot_params.screen_info.orig_video_lines;
current_ypos = boot_params.screen_info.orig_y;
early_console = &early_vga_console;
- } else if (!strncmp(buf, "simnow", 6)) {
- simnow_init(buf + 6);
- early_console = &simnow_console;
- keep_early = 1;
#ifdef CONFIG_EARLY_PRINTK_DBGP
} else if (!strncmp(buf, "dbgp", 4)) {
if (early_dbgp_init(buf+4) < 0)
diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S
index 43ceb3f454b..d6f0490a739 100644
--- a/arch/x86/kernel/entry_32.S
+++ b/arch/x86/kernel/entry_32.S
@@ -619,28 +619,37 @@ END(syscall_badsys)
27:;
/*
- * Build the entry stubs and pointer table with
- * some assembler magic.
+ * Build the entry stubs and pointer table with some assembler magic.
+ * We pack 7 stubs into a single 32-byte chunk, which will fit in a
+ * single cache line on all modern x86 implementations.
*/
-.section .rodata,"a"
+.section .init.rodata,"a"
ENTRY(interrupt)
.text
-
+ .p2align 5
+ .p2align CONFIG_X86_L1_CACHE_SHIFT
ENTRY(irq_entries_start)
RING0_INT_FRAME
-vector=0
-.rept NR_VECTORS
- ALIGN
- .if vector
+vector=FIRST_EXTERNAL_VECTOR
+.rept (NR_VECTORS-FIRST_EXTERNAL_VECTOR+6)/7
+ .balign 32
+ .rept 7
+ .if vector < NR_VECTORS
+ .if vector <> FIRST_EXTERNAL_VECTOR
CFI_ADJUST_CFA_OFFSET -4
- .endif
-1: pushl $~(vector)
+ .endif
+1: pushl $(~vector+0x80) /* Note: always in signed byte range */
CFI_ADJUST_CFA_OFFSET 4
- jmp common_interrupt
- .previous
+ .if ((vector-FIRST_EXTERNAL_VECTOR)%7) <> 6
+ jmp 2f
+ .endif
+ .previous
.long 1b
- .text
+ .text
vector=vector+1
+ .endif
+ .endr
+2: jmp common_interrupt
.endr
END(irq_entries_start)
@@ -652,8 +661,9 @@ END(interrupt)
* the CPU automatically disables interrupts when executing an IRQ vector,
* so IRQ-flags tracing has to follow that:
*/
- ALIGN
+ .p2align CONFIG_X86_L1_CACHE_SHIFT
common_interrupt:
+ addl $-0x80,(%esp) /* Adjust vector into the [-256,-1] range */
SAVE_ALL
TRACE_IRQS_OFF
movl %esp,%eax
@@ -678,65 +688,6 @@ ENDPROC(name)
/* The include is where all of the SMP etc. interrupts come from */
#include "entry_arch.h"
-KPROBE_ENTRY(page_fault)
- RING0_EC_FRAME
- pushl $do_page_fault
- CFI_ADJUST_CFA_OFFSET 4
- ALIGN
-error_code:
- /* the function address is in %fs's slot on the stack */
- pushl %es
- CFI_ADJUST_CFA_OFFSET 4
- /*CFI_REL_OFFSET es, 0*/
- pushl %ds
- CFI_ADJUST_CFA_OFFSET 4
- /*CFI_REL_OFFSET ds, 0*/
- pushl %eax
- CFI_ADJUST_CFA_OFFSET 4
- CFI_REL_OFFSET eax, 0
- pushl %ebp
- CFI_ADJUST_CFA_OFFSET 4
- CFI_REL_OFFSET ebp, 0
- pushl %edi
- CFI_ADJUST_CFA_OFFSET 4
- CFI_REL_OFFSET edi, 0
- pushl %esi
- CFI_ADJUST_CFA_OFFSET 4
- CFI_REL_OFFSET esi, 0
- pushl %edx
- CFI_ADJUST_CFA_OFFSET 4
- CFI_REL_OFFSET edx, 0
- pushl %ecx
- CFI_ADJUST_CFA_OFFSET 4
- CFI_REL_OFFSET ecx, 0
- pushl %ebx
- CFI_ADJUST_CFA_OFFSET 4
- CFI_REL_OFFSET ebx, 0
- cld
- pushl %fs
- CFI_ADJUST_CFA_OFFSET 4
- /*CFI_REL_OFFSET fs, 0*/
- movl $(__KERNEL_PERCPU), %ecx
- movl %ecx, %fs
- UNWIND_ESPFIX_STACK
- popl %ecx
- CFI_ADJUST_CFA_OFFSET -4
- /*CFI_REGISTER es, ecx*/
- movl PT_FS(%esp), %edi # get the function address
- movl PT_ORIG_EAX(%esp), %edx # get the error code
- movl $-1, PT_ORIG_EAX(%esp) # no syscall to restart
- mov %ecx, PT_FS(%esp)
- /*CFI_REL_OFFSET fs, ES*/
- movl $(__USER_DS), %ecx
- movl %ecx, %ds
- movl %ecx, %es
- TRACE_IRQS_OFF
- movl %esp,%eax # pt_regs pointer
- call *%edi
- jmp ret_from_exception
- CFI_ENDPROC
-KPROBE_END(page_fault)
-
ENTRY(coprocessor_error)
RING0_INT_FRAME
pushl $0
@@ -767,140 +718,6 @@ ENTRY(device_not_available)
CFI_ENDPROC
END(device_not_available)
-/*
- * Debug traps and NMI can happen at the one SYSENTER instruction
- * that sets up the real kernel stack. Check here, since we can't
- * allow the wrong stack to be used.
- *
- * "TSS_sysenter_sp0+12" is because the NMI/debug handler will have
- * already pushed 3 words if it hits on the sysenter instruction:
- * eflags, cs and eip.
- *
- * We just load the right stack, and push the three (known) values
- * by hand onto the new stack - while updating the return eip past
- * the instruction that would have done it for sysenter.
- */
-#define FIX_STACK(offset, ok, label) \
- cmpw $__KERNEL_CS,4(%esp); \
- jne ok; \
-label: \
- movl TSS_sysenter_sp0+offset(%esp),%esp; \
- CFI_DEF_CFA esp, 0; \
- CFI_UNDEFINED eip; \
- pushfl; \
- CFI_ADJUST_CFA_OFFSET 4; \
- pushl $__KERNEL_CS; \
- CFI_ADJUST_CFA_OFFSET 4; \
- pushl $sysenter_past_esp; \
- CFI_ADJUST_CFA_OFFSET 4; \
- CFI_REL_OFFSET eip, 0
-
-KPROBE_ENTRY(debug)
- RING0_INT_FRAME
- cmpl $ia32_sysenter_target,(%esp)
- jne debug_stack_correct
- FIX_STACK(12, debug_stack_correct, debug_esp_fix_insn)
-debug_stack_correct:
- pushl $-1 # mark this as an int
- CFI_ADJUST_CFA_OFFSET 4
- SAVE_ALL
- TRACE_IRQS_OFF
- xorl %edx,%edx # error code 0
- movl %esp,%eax # pt_regs pointer
- call do_debug
- jmp ret_from_exception
- CFI_ENDPROC
-KPROBE_END(debug)
-
-/*
- * NMI is doubly nasty. It can happen _while_ we're handling
- * a debug fault, and the debug fault hasn't yet been able to
- * clear up the stack. So we first check whether we got an
- * NMI on the sysenter entry path, but after that we need to
- * check whether we got an NMI on the debug path where the debug
- * fault happened on the sysenter path.
- */
-KPROBE_ENTRY(nmi)
- RING0_INT_FRAME
- pushl %eax
- CFI_ADJUST_CFA_OFFSET 4
- movl %ss, %eax
- cmpw $__ESPFIX_SS, %ax
- popl %eax
- CFI_ADJUST_CFA_OFFSET -4
- je nmi_espfix_stack
- cmpl $ia32_sysenter_target,(%esp)
- je nmi_stack_fixup
- pushl %eax
- CFI_ADJUST_CFA_OFFSET 4
- movl %esp,%eax
- /* Do not access memory above the end of our stack page,
- * it might not exist.
- */
- andl $(THREAD_SIZE-1),%eax
- cmpl $(THREAD_SIZE-20),%eax
- popl %eax
- CFI_ADJUST_CFA_OFFSET -4
- jae nmi_stack_correct
- cmpl $ia32_sysenter_target,12(%esp)
- je nmi_debug_stack_check
-nmi_stack_correct:
- /* We have a RING0_INT_FRAME here */
- pushl %eax
- CFI_ADJUST_CFA_OFFSET 4
- SAVE_ALL
- TRACE_IRQS_OFF
- xorl %edx,%edx # zero error code
- movl %esp,%eax # pt_regs pointer
- call do_nmi
- jmp restore_nocheck_notrace
- CFI_ENDPROC
-
-nmi_stack_fixup:
- RING0_INT_FRAME
- FIX_STACK(12,nmi_stack_correct, 1)
- jmp nmi_stack_correct
-
-nmi_debug_stack_check:
- /* We have a RING0_INT_FRAME here */
- cmpw $__KERNEL_CS,16(%esp)
- jne nmi_stack_correct
- cmpl $debug,(%esp)
- jb nmi_stack_correct
- cmpl $debug_esp_fix_insn,(%esp)
- ja nmi_stack_correct
- FIX_STACK(24,nmi_stack_correct, 1)
- jmp nmi_stack_correct
-
-nmi_espfix_stack:
- /* We have a RING0_INT_FRAME here.
- *
- * create the pointer to lss back
- */
- pushl %ss
- CFI_ADJUST_CFA_OFFSET 4
- pushl %esp
- CFI_ADJUST_CFA_OFFSET 4
- addw $4, (%esp)
- /* copy the iret frame of 12 bytes */
- .rept 3
- pushl 16(%esp)
- CFI_ADJUST_CFA_OFFSET 4
- .endr
- pushl %eax
- CFI_ADJUST_CFA_OFFSET 4
- SAVE_ALL
- TRACE_IRQS_OFF
- FIXUP_ESPFIX_STACK # %eax == %esp
- xorl %edx,%edx # zero error code
- call do_nmi
- RESTORE_REGS
- lss 12+4(%esp), %esp # back to espfix stack
- CFI_ADJUST_CFA_OFFSET -24
- jmp irq_return
- CFI_ENDPROC
-KPROBE_END(nmi)
-
#ifdef CONFIG_PARAVIRT
ENTRY(native_iret)
iret
@@ -916,19 +733,6 @@ ENTRY(native_irq_enable_sysexit)
END(native_irq_enable_sysexit)
#endif
-KPROBE_ENTRY(int3)
- RING0_INT_FRAME
- pushl $-1 # mark this as an int
- CFI_ADJUST_CFA_OFFSET 4
- SAVE_ALL
- TRACE_IRQS_OFF
- xorl %edx,%edx # zero error code
- movl %esp,%eax # pt_regs pointer
- call do_int3
- jmp ret_from_exception
- CFI_ENDPROC
-KPROBE_END(int3)
-
ENTRY(overflow)
RING0_INT_FRAME
pushl $0
@@ -993,14 +797,6 @@ ENTRY(stack_segment)
CFI_ENDPROC
END(stack_segment)
-KPROBE_ENTRY(general_protection)
- RING0_EC_FRAME
- pushl $do_general_protection
- CFI_ADJUST_CFA_OFFSET 4
- jmp error_code
- CFI_ENDPROC
-KPROBE_END(general_protection)
-
ENTRY(alignment_check)
RING0_EC_FRAME
pushl $do_alignment_check
@@ -1051,6 +847,7 @@ ENTRY(kernel_thread_helper)
push %eax
CFI_ADJUST_CFA_OFFSET 4
call do_exit
+ ud2 # padding for call trace
CFI_ENDPROC
ENDPROC(kernel_thread_helper)
@@ -1259,3 +1056,227 @@ return_to_handler:
#include "syscall_table_32.S"
syscall_table_size=(.-sys_call_table)
+
+/*
+ * Some functions should be protected against kprobes
+ */
+ .pushsection .kprobes.text, "ax"
+
+ENTRY(page_fault)
+ RING0_EC_FRAME
+ pushl $do_page_fault
+ CFI_ADJUST_CFA_OFFSET 4
+ ALIGN
+error_code:
+ /* the function address is in %fs's slot on the stack */
+ pushl %es
+ CFI_ADJUST_CFA_OFFSET 4
+ /*CFI_REL_OFFSET es, 0*/
+ pushl %ds
+ CFI_ADJUST_CFA_OFFSET 4
+ /*CFI_REL_OFFSET ds, 0*/
+ pushl %eax
+ CFI_ADJUST_CFA_OFFSET 4
+ CFI_REL_OFFSET eax, 0
+ pushl %ebp
+ CFI_ADJUST_CFA_OFFSET 4
+ CFI_REL_OFFSET ebp, 0
+ pushl %edi
+ CFI_ADJUST_CFA_OFFSET 4
+ CFI_REL_OFFSET edi, 0
+ pushl %esi
+ CFI_ADJUST_CFA_OFFSET 4
+ CFI_REL_OFFSET esi, 0
+ pushl %edx
+ CFI_ADJUST_CFA_OFFSET 4
+ CFI_REL_OFFSET edx, 0
+ pushl %ecx
+ CFI_ADJUST_CFA_OFFSET 4
+ CFI_REL_OFFSET ecx, 0
+ pushl %ebx
+ CFI_ADJUST_CFA_OFFSET 4
+ CFI_REL_OFFSET ebx, 0
+ cld
+ pushl %fs
+ CFI_ADJUST_CFA_OFFSET 4
+ /*CFI_REL_OFFSET fs, 0*/
+ movl $(__KERNEL_PERCPU), %ecx
+ movl %ecx, %fs
+ UNWIND_ESPFIX_STACK
+ popl %ecx
+ CFI_ADJUST_CFA_OFFSET -4
+ /*CFI_REGISTER es, ecx*/
+ movl PT_FS(%esp), %edi # get the function address
+ movl PT_ORIG_EAX(%esp), %edx # get the error code
+ movl $-1, PT_ORIG_EAX(%esp) # no syscall to restart
+ mov %ecx, PT_FS(%esp)
+ /*CFI_REL_OFFSET fs, ES*/
+ movl $(__USER_DS), %ecx
+ movl %ecx, %ds
+ movl %ecx, %es
+ TRACE_IRQS_OFF
+ movl %esp,%eax # pt_regs pointer
+ call *%edi
+ jmp ret_from_exception
+ CFI_ENDPROC
+END(page_fault)
+
+/*
+ * Debug traps and NMI can happen at the one SYSENTER instruction
+ * that sets up the real kernel stack. Check here, since we can't
+ * allow the wrong stack to be used.
+ *
+ * "TSS_sysenter_sp0+12" is because the NMI/debug handler will have
+ * already pushed 3 words if it hits on the sysenter instruction:
+ * eflags, cs and eip.
+ *
+ * We just load the right stack, and push the three (known) values
+ * by hand onto the new stack - while updating the return eip past
+ * the instruction that would have done it for sysenter.
+ */
+#define FIX_STACK(offset, ok, label) \
+ cmpw $__KERNEL_CS,4(%esp); \
+ jne ok; \
+label: \
+ movl TSS_sysenter_sp0+offset(%esp),%esp; \
+ CFI_DEF_CFA esp, 0; \
+ CFI_UNDEFINED eip; \
+ pushfl; \
+ CFI_ADJUST_CFA_OFFSET 4; \
+ pushl $__KERNEL_CS; \
+ CFI_ADJUST_CFA_OFFSET 4; \
+ pushl $sysenter_past_esp; \
+ CFI_ADJUST_CFA_OFFSET 4; \
+ CFI_REL_OFFSET eip, 0
+
+ENTRY(debug)
+ RING0_INT_FRAME
+ cmpl $ia32_sysenter_target,(%esp)
+ jne debug_stack_correct
+ FIX_STACK(12, debug_stack_correct, debug_esp_fix_insn)
+debug_stack_correct:
+ pushl $-1 # mark this as an int
+ CFI_ADJUST_CFA_OFFSET 4
+ SAVE_ALL
+ TRACE_IRQS_OFF
+ xorl %edx,%edx # error code 0
+ movl %esp,%eax # pt_regs pointer
+ call do_debug
+ jmp ret_from_exception
+ CFI_ENDPROC
+END(debug)
+
+/*
+ * NMI is doubly nasty. It can happen _while_ we're handling
+ * a debug fault, and the debug fault hasn't yet been able to
+ * clear up the stack. So we first check whether we got an
+ * NMI on the sysenter entry path, but after that we need to
+ * check whether we got an NMI on the debug path where the debug
+ * fault happened on the sysenter path.
+ */
+ENTRY(nmi)
+ RING0_INT_FRAME
+ pushl %eax
+ CFI_ADJUST_CFA_OFFSET 4
+ movl %ss, %eax
+ cmpw $__ESPFIX_SS, %ax
+ popl %eax
+ CFI_ADJUST_CFA_OFFSET -4
+ je nmi_espfix_stack
+ cmpl $ia32_sysenter_target,(%esp)
+ je nmi_stack_fixup
+ pushl %eax
+ CFI_ADJUST_CFA_OFFSET 4
+ movl %esp,%eax
+ /* Do not access memory above the end of our stack page,
+ * it might not exist.
+ */
+ andl $(THREAD_SIZE-1),%eax
+ cmpl $(THREAD_SIZE-20),%eax
+ popl %eax
+ CFI_ADJUST_CFA_OFFSET -4
+ jae nmi_stack_correct
+ cmpl $ia32_sysenter_target,12(%esp)
+ je nmi_debug_stack_check
+nmi_stack_correct:
+ /* We have a RING0_INT_FRAME here */
+ pushl %eax
+ CFI_ADJUST_CFA_OFFSET 4
+ SAVE_ALL
+ TRACE_IRQS_OFF
+ xorl %edx,%edx # zero error code
+ movl %esp,%eax # pt_regs pointer
+ call do_nmi
+ jmp restore_nocheck_notrace
+ CFI_ENDPROC
+
+nmi_stack_fixup:
+ RING0_INT_FRAME
+ FIX_STACK(12,nmi_stack_correct, 1)
+ jmp nmi_stack_correct
+
+nmi_debug_stack_check:
+ /* We have a RING0_INT_FRAME here */
+ cmpw $__KERNEL_CS,16(%esp)
+ jne nmi_stack_correct
+ cmpl $debug,(%esp)
+ jb nmi_stack_correct
+ cmpl $debug_esp_fix_insn,(%esp)
+ ja nmi_stack_correct
+ FIX_STACK(24,nmi_stack_correct, 1)
+ jmp nmi_stack_correct
+
+nmi_espfix_stack:
+ /* We have a RING0_INT_FRAME here.
+ *
+ * create the pointer to lss back
+ */
+ pushl %ss
+ CFI_ADJUST_CFA_OFFSET 4
+ pushl %esp
+ CFI_ADJUST_CFA_OFFSET 4
+ addw $4, (%esp)
+ /* copy the iret frame of 12 bytes */
+ .rept 3
+ pushl 16(%esp)
+ CFI_ADJUST_CFA_OFFSET 4
+ .endr
+ pushl %eax
+ CFI_ADJUST_CFA_OFFSET 4
+ SAVE_ALL
+ TRACE_IRQS_OFF
+ FIXUP_ESPFIX_STACK # %eax == %esp
+ xorl %edx,%edx # zero error code
+ call do_nmi
+ RESTORE_REGS
+ lss 12+4(%esp), %esp # back to espfix stack
+ CFI_ADJUST_CFA_OFFSET -24
+ jmp irq_return
+ CFI_ENDPROC
+END(nmi)
+
+ENTRY(int3)
+ RING0_INT_FRAME
+ pushl $-1 # mark this as an int
+ CFI_ADJUST_CFA_OFFSET 4
+ SAVE_ALL
+ TRACE_IRQS_OFF
+ xorl %edx,%edx # zero error code
+ movl %esp,%eax # pt_regs pointer
+ call do_int3
+ jmp ret_from_exception
+ CFI_ENDPROC
+END(int3)
+
+ENTRY(general_protection)
+ RING0_EC_FRAME
+ pushl $do_general_protection
+ CFI_ADJUST_CFA_OFFSET 4
+ jmp error_code
+ CFI_ENDPROC
+END(general_protection)
+
+/*
+ * End of kprobes section
+ */
+ .popsection
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index 54e0bbdccb9..e28c7a98779 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -11,15 +11,15 @@
*
* NOTE: This code handles signal-recognition, which happens every time
* after an interrupt and after each system call.
- *
- * Normal syscalls and interrupts don't save a full stack frame, this is
+ *
+ * Normal syscalls and interrupts don't save a full stack frame, this is
* only done for syscall tracing, signals or fork/exec et.al.
- *
- * A note on terminology:
- * - top of stack: Architecture defined interrupt frame from SS to RIP
- * at the top of the kernel process stack.
+ *
+ * A note on terminology:
+ * - top of stack: Architecture defined interrupt frame from SS to RIP
+ * at the top of the kernel process stack.
* - partial stack frame: partially saved registers upto R11.
- * - full stack frame: Like partial stack frame, but all register saved.
+ * - full stack frame: Like partial stack frame, but all register saved.
*
* Some macro usage:
* - CFI macros are used to generate dwarf2 unwind information for better
@@ -60,7 +60,6 @@
#define __AUDIT_ARCH_LE 0x40000000
.code64
-
#ifdef CONFIG_FUNCTION_TRACER
#ifdef CONFIG_DYNAMIC_FTRACE
ENTRY(mcount)
@@ -71,15 +70,7 @@ ENTRY(ftrace_caller)
cmpl $0, function_trace_stop
jne ftrace_stub
- /* taken from glibc */
- subq $0x38, %rsp
- movq %rax, (%rsp)
- movq %rcx, 8(%rsp)
- movq %rdx, 16(%rsp)
- movq %rsi, 24(%rsp)
- movq %rdi, 32(%rsp)
- movq %r8, 40(%rsp)
- movq %r9, 48(%rsp)
+ MCOUNT_SAVE_FRAME
movq 0x38(%rsp), %rdi
movq 8(%rbp), %rsi
@@ -89,14 +80,7 @@ ENTRY(ftrace_caller)
ftrace_call:
call ftrace_stub
- movq 48(%rsp), %r9
- movq 40(%rsp), %r8
- movq 32(%rsp), %rdi
- movq 24(%rsp), %rsi
- movq 16(%rsp), %rdx
- movq 8(%rsp), %rcx
- movq (%rsp), %rax
- addq $0x38, %rsp
+ MCOUNT_RESTORE_FRAME
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
.globl ftrace_graph_call
@@ -130,15 +114,7 @@ ftrace_stub:
retq
trace:
- /* taken from glibc */
- subq $0x38, %rsp
- movq %rax, (%rsp)
- movq %rcx, 8(%rsp)
- movq %rdx, 16(%rsp)
- movq %rsi, 24(%rsp)
- movq %rdi, 32(%rsp)
- movq %r8, 40(%rsp)
- movq %r9, 48(%rsp)
+ MCOUNT_SAVE_FRAME
movq 0x38(%rsp), %rdi
movq 8(%rbp), %rsi
@@ -146,14 +122,7 @@ trace:
call *ftrace_trace_function
- movq 48(%rsp), %r9
- movq 40(%rsp), %r8
- movq 32(%rsp), %rdi
- movq 24(%rsp), %rsi
- movq 16(%rsp), %rdx
- movq 8(%rsp), %rcx
- movq (%rsp), %rax
- addq $0x38, %rsp
+ MCOUNT_RESTORE_FRAME
jmp ftrace_stub
END(mcount)
@@ -165,14 +134,7 @@ ENTRY(ftrace_graph_caller)
cmpl $0, function_trace_stop
jne ftrace_stub
- subq $0x38, %rsp
- movq %rax, (%rsp)
- movq %rcx, 8(%rsp)
- movq %rdx, 16(%rsp)
- movq %rsi, 24(%rsp)
- movq %rdi, 32(%rsp)
- movq %r8, 40(%rsp)
- movq %r9, 48(%rsp)
+ MCOUNT_SAVE_FRAME
leaq 8(%rbp), %rdi
movq 0x38(%rsp), %rsi
@@ -180,14 +142,8 @@ ENTRY(ftrace_graph_caller)
call prepare_ftrace_return
- movq 48(%rsp), %r9
- movq 40(%rsp), %r8
- movq 32(%rsp), %rdi
- movq 24(%rsp), %rsi
- movq 16(%rsp), %rdx
- movq 8(%rsp), %rcx
- movq (%rsp), %rax
- addq $0x38, %rsp
+ MCOUNT_RESTORE_FRAME
+
retq
END(ftrace_graph_caller)
@@ -225,7 +181,7 @@ return_to_handler:
#ifndef CONFIG_PREEMPT
#define retint_kernel retint_restore_args
-#endif
+#endif
#ifdef CONFIG_PARAVIRT
ENTRY(native_usergs_sysret64)
@@ -244,29 +200,29 @@ ENTRY(native_usergs_sysret64)
.endm
/*
- * C code is not supposed to know about undefined top of stack. Every time
- * a C function with an pt_regs argument is called from the SYSCALL based
+ * C code is not supposed to know about undefined top of stack. Every time
+ * a C function with an pt_regs argument is called from the SYSCALL based
* fast path FIXUP_TOP_OF_STACK is needed.
* RESTORE_TOP_OF_STACK syncs the syscall state after any possible ptregs
* manipulation.
- */
-
- /* %rsp:at FRAMEEND */
- .macro FIXUP_TOP_OF_STACK tmp
- movq %gs:pda_oldrsp,\tmp
- movq \tmp,RSP(%rsp)
- movq $__USER_DS,SS(%rsp)
- movq $__USER_CS,CS(%rsp)
- movq $-1,RCX(%rsp)
- movq R11(%rsp),\tmp /* get eflags */
- movq \tmp,EFLAGS(%rsp)
+ */
+
+ /* %rsp:at FRAMEEND */
+ .macro FIXUP_TOP_OF_STACK tmp offset=0
+ movq %gs:pda_oldrsp,\tmp
+ movq \tmp,RSP+\offset(%rsp)
+ movq $__USER_DS,SS+\offset(%rsp)
+ movq $__USER_CS,CS+\offset(%rsp)
+ movq $-1,RCX+\offset(%rsp)
+ movq R11+\offset(%rsp),\tmp /* get eflags */
+ movq \tmp,EFLAGS+\offset(%rsp)
.endm
- .macro RESTORE_TOP_OF_STACK tmp,offset=0
- movq RSP-\offset(%rsp),\tmp
- movq \tmp,%gs:pda_oldrsp
- movq EFLAGS-\offset(%rsp),\tmp
- movq \tmp,R11-\offset(%rsp)
+ .macro RESTORE_TOP_OF_STACK tmp offset=0
+ movq RSP+\offset(%rsp),\tmp
+ movq \tmp,%gs:pda_oldrsp
+ movq EFLAGS+\offset(%rsp),\tmp
+ movq \tmp,R11+\offset(%rsp)
.endm
.macro FAKE_STACK_FRAME child_rip
@@ -278,7 +234,7 @@ ENTRY(native_usergs_sysret64)
pushq %rax /* rsp */
CFI_ADJUST_CFA_OFFSET 8
CFI_REL_OFFSET rsp,0
- pushq $(1<<9) /* eflags - interrupts on */
+ pushq $X86_EFLAGS_IF /* eflags - interrupts on */
CFI_ADJUST_CFA_OFFSET 8
/*CFI_REL_OFFSET rflags,0*/
pushq $__KERNEL_CS /* cs */
@@ -296,62 +252,184 @@ ENTRY(native_usergs_sysret64)
CFI_ADJUST_CFA_OFFSET -(6*8)
.endm
- .macro CFI_DEFAULT_STACK start=1
+/*
+ * initial frame state for interrupts (and exceptions without error code)
+ */
+ .macro EMPTY_FRAME start=1 offset=0
.if \start
- CFI_STARTPROC simple
+ CFI_STARTPROC simple
CFI_SIGNAL_FRAME
- CFI_DEF_CFA rsp,SS+8
+ CFI_DEF_CFA rsp,8+\offset
.else
- CFI_DEF_CFA_OFFSET SS+8
+ CFI_DEF_CFA_OFFSET 8+\offset
.endif
- CFI_REL_OFFSET r15,R15
- CFI_REL_OFFSET r14,R14
- CFI_REL_OFFSET r13,R13
- CFI_REL_OFFSET r12,R12
- CFI_REL_OFFSET rbp,RBP
- CFI_REL_OFFSET rbx,RBX
- CFI_REL_OFFSET r11,R11
- CFI_REL_OFFSET r10,R10
- CFI_REL_OFFSET r9,R9
- CFI_REL_OFFSET r8,R8
- CFI_REL_OFFSET rax,RAX
- CFI_REL_OFFSET rcx,RCX
- CFI_REL_OFFSET rdx,RDX
- CFI_REL_OFFSET rsi,RSI
- CFI_REL_OFFSET rdi,RDI
- CFI_REL_OFFSET rip,RIP
- /*CFI_REL_OFFSET cs,CS*/
- /*CFI_REL_OFFSET rflags,EFLAGS*/
- CFI_REL_OFFSET rsp,RSP
- /*CFI_REL_OFFSET ss,SS*/
.endm
+
/*
- * A newly forked process directly context switches into this.
- */
-/* rdi: prev */
+ * initial frame state for interrupts (and exceptions without error code)
+ */
+ .macro INTR_FRAME start=1 offset=0
+ EMPTY_FRAME \start, SS+8+\offset-RIP
+ /*CFI_REL_OFFSET ss, SS+\offset-RIP*/
+ CFI_REL_OFFSET rsp, RSP+\offset-RIP
+ /*CFI_REL_OFFSET rflags, EFLAGS+\offset-RIP*/
+ /*CFI_REL_OFFSET cs, CS+\offset-RIP*/
+ CFI_REL_OFFSET rip, RIP+\offset-RIP
+ .endm
+
+/*
+ * initial frame state for exceptions with error code (and interrupts
+ * with vector already pushed)
+ */
+ .macro XCPT_FRAME start=1 offset=0
+ INTR_FRAME \start, RIP+\offset-ORIG_RAX
+ /*CFI_REL_OFFSET orig_rax, ORIG_RAX-ORIG_RAX*/
+ .endm
+
+/*
+ * frame that enables calling into C.
+ */
+ .macro PARTIAL_FRAME start=1 offset=0
+ XCPT_FRAME \start, ORIG_RAX+\offset-ARGOFFSET
+ CFI_REL_OFFSET rdi, RDI+\offset-ARGOFFSET
+ CFI_REL_OFFSET rsi, RSI+\offset-ARGOFFSET
+ CFI_REL_OFFSET rdx, RDX+\offset-ARGOFFSET
+ CFI_REL_OFFSET rcx, RCX+\offset-ARGOFFSET
+ CFI_REL_OFFSET rax, RAX+\offset-ARGOFFSET
+ CFI_REL_OFFSET r8, R8+\offset-ARGOFFSET
+ CFI_REL_OFFSET r9, R9+\offset-ARGOFFSET
+ CFI_REL_OFFSET r10, R10+\offset-ARGOFFSET
+ CFI_REL_OFFSET r11, R11+\offset-ARGOFFSET
+ .endm
+
+/*
+ * frame that enables passing a complete pt_regs to a C function.
+ */
+ .macro DEFAULT_FRAME start=1 offset=0
+ PARTIAL_FRAME \start, R11+\offset-R15
+ CFI_REL_OFFSET rbx, RBX+\offset
+ CFI_REL_OFFSET rbp, RBP+\offset
+ CFI_REL_OFFSET r12, R12+\offset
+ CFI_REL_OFFSET r13, R13+\offset
+ CFI_REL_OFFSET r14, R14+\offset
+ CFI_REL_OFFSET r15, R15+\offset
+ .endm
+
+/* save partial stack frame */
+ENTRY(save_args)
+ XCPT_FRAME
+ cld
+ movq_cfi rdi, RDI+16-ARGOFFSET
+ movq_cfi rsi, RSI+16-ARGOFFSET
+ movq_cfi rdx, RDX+16-ARGOFFSET
+ movq_cfi rcx, RCX+16-ARGOFFSET
+ movq_cfi rax, RAX+16-ARGOFFSET
+ movq_cfi r8, R8+16-ARGOFFSET
+ movq_cfi r9, R9+16-ARGOFFSET
+ movq_cfi r10, R10+16-ARGOFFSET
+ movq_cfi r11, R11+16-ARGOFFSET
+
+ leaq -ARGOFFSET+16(%rsp),%rdi /* arg1 for handler */
+ movq_cfi rbp, 8 /* push %rbp */
+ leaq 8(%rsp), %rbp /* mov %rsp, %ebp */
+ testl $3, CS(%rdi)
+ je 1f
+ SWAPGS
+ /*
+ * irqcount is used to check if a CPU is already on an interrupt stack
+ * or not. While this is essentially redundant with preempt_count it is
+ * a little cheaper to use a separate counter in the PDA (short of
+ * moving irq_enter into assembly, which would be too much work)
+ */
+1: incl %gs:pda_irqcount
+ jne 2f
+ popq_cfi %rax /* move return address... */
+ mov %gs:pda_irqstackptr,%rsp
+ EMPTY_FRAME 0
+ pushq_cfi %rax /* ... to the new stack */
+ /*
+ * We entered an interrupt context - irqs are off:
+ */
+2: TRACE_IRQS_OFF
+ ret
+ CFI_ENDPROC
+END(save_args)
+
+ENTRY(save_rest)
+ PARTIAL_FRAME 1 REST_SKIP+8
+ movq 5*8+16(%rsp), %r11 /* save return address */
+ movq_cfi rbx, RBX+16
+ movq_cfi rbp, RBP+16
+ movq_cfi r12, R12+16
+ movq_cfi r13, R13+16
+ movq_cfi r14, R14+16
+ movq_cfi r15, R15+16
+ movq %r11, 8(%rsp) /* return address */
+ FIXUP_TOP_OF_STACK %r11, 16
+ ret
+ CFI_ENDPROC
+END(save_rest)
+
+/* save complete stack frame */
+ENTRY(save_paranoid)
+ XCPT_FRAME 1 RDI+8
+ cld
+ movq_cfi rdi, RDI+8
+ movq_cfi rsi, RSI+8
+ movq_cfi rdx, RDX+8
+ movq_cfi rcx, RCX+8
+ movq_cfi rax, RAX+8
+ movq_cfi r8, R8+8
+ movq_cfi r9, R9+8
+ movq_cfi r10, R10+8
+ movq_cfi r11, R11+8
+ movq_cfi rbx, RBX+8
+ movq_cfi rbp, RBP+8
+ movq_cfi r12, R12+8
+ movq_cfi r13, R13+8
+ movq_cfi r14, R14+8
+ movq_cfi r15, R15+8
+ movl $1,%ebx
+ movl $MSR_GS_BASE,%ecx
+ rdmsr
+ testl %edx,%edx
+ js 1f /* negative -> in kernel */
+ SWAPGS
+ xorl %ebx,%ebx
+1: ret
+ CFI_ENDPROC
+END(save_paranoid)
+
+/*
+ * A newly forked process directly context switches into this address.
+ *
+ * rdi: prev task we switched from
+ */
ENTRY(ret_from_fork)
- CFI_DEFAULT_STACK
+ DEFAULT_FRAME
+
push kernel_eflags(%rip)
CFI_ADJUST_CFA_OFFSET 8
- popf # reset kernel eflags
+ popf # reset kernel eflags
CFI_ADJUST_CFA_OFFSET -8
- call schedule_tail
+
+ call schedule_tail # rdi: 'prev' task parameter
+
GET_THREAD_INFO(%rcx)
- testl $(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT),TI_flags(%rcx)
- jnz rff_trace
-rff_action:
+
+ CFI_REMEMBER_STATE
RESTORE_REST
- testl $3,CS-ARGOFFSET(%rsp) # from kernel_thread?
+
+ testl $3, CS-ARGOFFSET(%rsp) # from kernel_thread?
je int_ret_from_sys_call
- testl $_TIF_IA32,TI_flags(%rcx)
+
+ testl $_TIF_IA32, TI_flags(%rcx) # 32-bit compat task needs IRET
jnz int_ret_from_sys_call
- RESTORE_TOP_OF_STACK %rdi,ARGOFFSET
- jmp ret_from_sys_call
-rff_trace:
- movq %rsp,%rdi
- call syscall_trace_leave
- GET_THREAD_INFO(%rcx)
- jmp rff_action
+
+ RESTORE_TOP_OF_STACK %rdi, -ARGOFFSET
+ jmp ret_from_sys_call # go to the SYSRET fastpath
+
+ CFI_RESTORE_STATE
CFI_ENDPROC
END(ret_from_fork)
@@ -361,20 +439,20 @@ END(ret_from_fork)
* SYSCALL does not save anything on the stack and does not change the
* stack pointer.
*/
-
+
/*
- * Register setup:
+ * Register setup:
* rax system call number
* rdi arg0
- * rcx return address for syscall/sysret, C arg3
+ * rcx return address for syscall/sysret, C arg3
* rsi arg1
- * rdx arg2
+ * rdx arg2
* r10 arg3 (--> moved to rcx for C)
* r8 arg4
* r9 arg5
* r11 eflags for syscall/sysret, temporary for C
- * r12-r15,rbp,rbx saved by C code, not touched.
- *
+ * r12-r15,rbp,rbx saved by C code, not touched.
+ *
* Interrupts are off on entry.
* Only called from user space.
*
@@ -384,7 +462,7 @@ END(ret_from_fork)
* When user can change the frames always force IRET. That is because
* it deals with uncanonical addresses better. SYSRET has trouble
* with them due to bugs in both AMD and Intel CPUs.
- */
+ */
ENTRY(system_call)
CFI_STARTPROC simple
@@ -400,7 +478,7 @@ ENTRY(system_call)
*/
ENTRY(system_call_after_swapgs)
- movq %rsp,%gs:pda_oldrsp
+ movq %rsp,%gs:pda_oldrsp
movq %gs:pda_kernelstack,%rsp
/*
* No need to follow this irqs off/on section - it's straight
@@ -408,7 +486,7 @@ ENTRY(system_call_after_swapgs)
*/
ENABLE_INTERRUPTS(CLBR_NONE)
SAVE_ARGS 8,1
- movq %rax,ORIG_RAX-ARGOFFSET(%rsp)
+ movq %rax,ORIG_RAX-ARGOFFSET(%rsp)
movq %rcx,RIP-ARGOFFSET(%rsp)
CFI_REL_OFFSET rip,RIP-ARGOFFSET
GET_THREAD_INFO(%rcx)
@@ -422,19 +500,19 @@ system_call_fastpath:
movq %rax,RAX-ARGOFFSET(%rsp)
/*
* Syscall return path ending with SYSRET (fast path)
- * Has incomplete stack frame and undefined top of stack.
- */
+ * Has incomplete stack frame and undefined top of stack.
+ */
ret_from_sys_call:
movl $_TIF_ALLWORK_MASK,%edi
/* edi: flagmask */
-sysret_check:
+sysret_check:
LOCKDEP_SYS_EXIT
GET_THREAD_INFO(%rcx)
DISABLE_INTERRUPTS(CLBR_NONE)
TRACE_IRQS_OFF
movl TI_flags(%rcx),%edx
andl %edi,%edx
- jnz sysret_careful
+ jnz sysret_careful
CFI_REMEMBER_STATE
/*
* sysretq will re-enable interrupts:
@@ -449,7 +527,7 @@ sysret_check:
CFI_RESTORE_STATE
/* Handle reschedules */
- /* edx: work, edi: workmask */
+ /* edx: work, edi: workmask */
sysret_careful:
bt $TIF_NEED_RESCHED,%edx
jnc sysret_signal
@@ -462,7 +540,7 @@ sysret_careful:
CFI_ADJUST_CFA_OFFSET -8
jmp sysret_check
- /* Handle a signal */
+ /* Handle a signal */
sysret_signal:
TRACE_IRQS_ON
ENABLE_INTERRUPTS(CLBR_NONE)
@@ -471,17 +549,20 @@ sysret_signal:
jc sysret_audit
#endif
/* edx: work flags (arg3) */
- leaq do_notify_resume(%rip),%rax
leaq -ARGOFFSET(%rsp),%rdi # &pt_regs -> arg1
xorl %esi,%esi # oldset -> arg2
- call ptregscall_common
+ SAVE_REST
+ FIXUP_TOP_OF_STACK %r11
+ call do_notify_resume
+ RESTORE_TOP_OF_STACK %r11
+ RESTORE_REST
movl $_TIF_WORK_MASK,%edi
/* Use IRET because user could have changed frame. This
works because ptregscall_common has called FIXUP_TOP_OF_STACK. */
DISABLE_INTERRUPTS(CLBR_NONE)
TRACE_IRQS_OFF
jmp int_with_check
-
+
badsys:
movq $-ENOSYS,RAX-ARGOFFSET(%rsp)
jmp ret_from_sys_call
@@ -520,7 +601,7 @@ sysret_audit:
#endif /* CONFIG_AUDITSYSCALL */
/* Do syscall tracing */
-tracesys:
+tracesys:
#ifdef CONFIG_AUDITSYSCALL
testl $(_TIF_WORK_SYSCALL_ENTRY & ~_TIF_SYSCALL_AUDIT),TI_flags(%rcx)
jz auditsys
@@ -543,8 +624,8 @@ tracesys:
call *sys_call_table(,%rax,8)
movq %rax,RAX-ARGOFFSET(%rsp)
/* Use IRET because user could have changed frame */
-
-/*
+
+/*
* Syscall return path ending with IRET.
* Has correct top of stack, but partial stack frame.
*/
@@ -588,18 +669,18 @@ int_very_careful:
TRACE_IRQS_ON
ENABLE_INTERRUPTS(CLBR_NONE)
SAVE_REST
- /* Check for syscall exit trace */
+ /* Check for syscall exit trace */
testl $_TIF_WORK_SYSCALL_EXIT,%edx
jz int_signal
pushq %rdi
CFI_ADJUST_CFA_OFFSET 8
- leaq 8(%rsp),%rdi # &ptregs -> arg1
+ leaq 8(%rsp),%rdi # &ptregs -> arg1
call syscall_trace_leave
popq %rdi
CFI_ADJUST_CFA_OFFSET -8
andl $~(_TIF_WORK_SYSCALL_EXIT|_TIF_SYSCALL_EMU),%edi
jmp int_restore_rest
-
+
int_signal:
testl $_TIF_DO_NOTIFY_MASK,%edx
jz 1f
@@ -614,22 +695,24 @@ int_restore_rest:
jmp int_with_check
CFI_ENDPROC
END(system_call)
-
-/*
+
+/*
* Certain special system calls that need to save a complete full stack frame.
- */
-
+ */
.macro PTREGSCALL label,func,arg
- .globl \label
-\label:
- leaq \func(%rip),%rax
- leaq -ARGOFFSET+8(%rsp),\arg /* 8 for return address */
- jmp ptregscall_common
+ENTRY(\label)
+ PARTIAL_FRAME 1 8 /* offset 8: return address */
+ subq $REST_SKIP, %rsp
+ CFI_ADJUST_CFA_OFFSET REST_SKIP
+ call save_rest
+ DEFAULT_FRAME 0 8 /* offset 8: return address */
+ leaq 8(%rsp), \arg /* pt_regs pointer */
+ call \func
+ jmp ptregscall_common
+ CFI_ENDPROC
END(\label)
.endm
- CFI_STARTPROC
-
PTREGSCALL stub_clone, sys_clone, %r8
PTREGSCALL stub_fork, sys_fork, %rdi
PTREGSCALL stub_vfork, sys_vfork, %rdi
@@ -637,25 +720,18 @@ END(\label)
PTREGSCALL stub_iopl, sys_iopl, %rsi
ENTRY(ptregscall_common)
- popq %r11
- CFI_ADJUST_CFA_OFFSET -8
- CFI_REGISTER rip, r11
- SAVE_REST
- movq %r11, %r15
- CFI_REGISTER rip, r15
- FIXUP_TOP_OF_STACK %r11
- call *%rax
- RESTORE_TOP_OF_STACK %r11
- movq %r15, %r11
- CFI_REGISTER rip, r11
- RESTORE_REST
- pushq %r11
- CFI_ADJUST_CFA_OFFSET 8
- CFI_REL_OFFSET rip, 0
- ret
+ DEFAULT_FRAME 1 8 /* offset 8: return address */
+ RESTORE_TOP_OF_STACK %r11, 8
+ movq_cfi_restore R15+8, r15
+ movq_cfi_restore R14+8, r14
+ movq_cfi_restore R13+8, r13
+ movq_cfi_restore R12+8, r12
+ movq_cfi_restore RBP+8, rbp
+ movq_cfi_restore RBX+8, rbx
+ ret $REST_SKIP /* pop extended registers */
CFI_ENDPROC
END(ptregscall_common)
-
+
ENTRY(stub_execve)
CFI_STARTPROC
popq %r11
@@ -671,11 +747,11 @@ ENTRY(stub_execve)
jmp int_ret_from_sys_call
CFI_ENDPROC
END(stub_execve)
-
+
/*
* sigreturn is special because it needs to restore all registers on return.
* This cannot be done with SYSRET, so use the IRET return path instead.
- */
+ */
ENTRY(stub_rt_sigreturn)
CFI_STARTPROC
addq $8, %rsp
@@ -691,70 +767,70 @@ ENTRY(stub_rt_sigreturn)
END(stub_rt_sigreturn)
/*
- * initial frame state for interrupts and exceptions
+ * Build the entry stubs and pointer table with some assembler magic.
+ * We pack 7 stubs into a single 32-byte chunk, which will fit in a
+ * single cache line on all modern x86 implementations.
*/
- .macro _frame ref
- CFI_STARTPROC simple
- CFI_SIGNAL_FRAME
- CFI_DEF_CFA rsp,SS+8-\ref
- /*CFI_REL_OFFSET ss,SS-\ref*/
- CFI_REL_OFFSET rsp,RSP-\ref
- /*CFI_REL_OFFSET rflags,EFLAGS-\ref*/
- /*CFI_REL_OFFSET cs,CS-\ref*/
- CFI_REL_OFFSET rip,RIP-\ref
- .endm
+ .section .init.rodata,"a"
+ENTRY(interrupt)
+ .text
+ .p2align 5
+ .p2align CONFIG_X86_L1_CACHE_SHIFT
+ENTRY(irq_entries_start)
+ INTR_FRAME
+vector=FIRST_EXTERNAL_VECTOR
+.rept (NR_VECTORS-FIRST_EXTERNAL_VECTOR+6)/7
+ .balign 32
+ .rept 7
+ .if vector < NR_VECTORS
+ .if vector <> FIRST_EXTERNAL_VECTOR
+ CFI_ADJUST_CFA_OFFSET -8
+ .endif
+1: pushq $(~vector+0x80) /* Note: always in signed byte range */
+ CFI_ADJUST_CFA_OFFSET 8
+ .if ((vector-FIRST_EXTERNAL_VECTOR)%7) <> 6
+ jmp 2f
+ .endif
+ .previous
+ .quad 1b
+ .text
+vector=vector+1
+ .endif
+ .endr
+2: jmp common_interrupt
+.endr
+ CFI_ENDPROC
+END(irq_entries_start)
-/* initial frame state for interrupts (and exceptions without error code) */
-#define INTR_FRAME _frame RIP
-/* initial frame state for exceptions with error code (and interrupts with
- vector already pushed) */
-#define XCPT_FRAME _frame ORIG_RAX
+.previous
+END(interrupt)
+.previous
-/*
+/*
* Interrupt entry/exit.
*
* Interrupt entry points save only callee clobbered registers in fast path.
- *
- * Entry runs with interrupts off.
- */
+ *
+ * Entry runs with interrupts off.
+ */
-/* 0(%rsp): interrupt number */
+/* 0(%rsp): ~(interrupt number) */
.macro interrupt func
- cld
- SAVE_ARGS
- leaq -ARGOFFSET(%rsp),%rdi # arg1 for handler
- pushq %rbp
- /*
- * Save rbp twice: One is for marking the stack frame, as usual, and the
- * other, to fill pt_regs properly. This is because bx comes right
- * before the last saved register in that structure, and not bp. If the
- * base pointer were in the place bx is today, this would not be needed.
- */
- movq %rbp, -8(%rsp)
- CFI_ADJUST_CFA_OFFSET 8
- CFI_REL_OFFSET rbp, 0
- movq %rsp,%rbp
- CFI_DEF_CFA_REGISTER rbp
- testl $3,CS(%rdi)
- je 1f
- SWAPGS
- /* irqcount is used to check if a CPU is already on an interrupt
- stack or not. While this is essentially redundant with preempt_count
- it is a little cheaper to use a separate counter in the PDA
- (short of moving irq_enter into assembly, which would be too
- much work) */
-1: incl %gs:pda_irqcount
- cmoveq %gs:pda_irqstackptr,%rsp
- push %rbp # backlink for old unwinder
- /*
- * We entered an interrupt context - irqs are off:
- */
- TRACE_IRQS_OFF
+ subq $10*8, %rsp
+ CFI_ADJUST_CFA_OFFSET 10*8
+ call save_args
+ PARTIAL_FRAME 0
call \func
.endm
-ENTRY(common_interrupt)
+ /*
+ * The interrupt stubs push (~vector+0x80) onto the stack and
+ * then jump to common_interrupt.
+ */
+ .p2align CONFIG_X86_L1_CACHE_SHIFT
+common_interrupt:
XCPT_FRAME
+ addq $-0x80,(%rsp) /* Adjust vector to [-256,-1] range */
interrupt do_IRQ
/* 0(%rsp): oldrsp-ARGOFFSET */
ret_from_intr:
@@ -768,12 +844,12 @@ exit_intr:
GET_THREAD_INFO(%rcx)
testl $3,CS-ARGOFFSET(%rsp)
je retint_kernel
-
+
/* Interrupt came from user space */
/*
* Has a correct top of stack, but a partial stack frame
* %rcx: thread info. Interrupts off.
- */
+ */
retint_with_reschedule:
movl $_TIF_WORK_MASK,%edi
retint_check:
@@ -846,20 +922,20 @@ retint_careful:
pushq %rdi
CFI_ADJUST_CFA_OFFSET 8
call schedule
- popq %rdi
+ popq %rdi
CFI_ADJUST_CFA_OFFSET -8
GET_THREAD_INFO(%rcx)
DISABLE_INTERRUPTS(CLBR_NONE)
TRACE_IRQS_OFF
jmp retint_check
-
+
retint_signal:
testl $_TIF_DO_NOTIFY_MASK,%edx
jz retint_swapgs
TRACE_IRQS_ON
ENABLE_INTERRUPTS(CLBR_NONE)
SAVE_REST
- movq $-1,ORIG_RAX(%rsp)
+ movq $-1,ORIG_RAX(%rsp)
xorl %esi,%esi # oldset
movq %rsp,%rdi # &pt_regs
call do_notify_resume
@@ -881,324 +957,211 @@ ENTRY(retint_kernel)
jnc retint_restore_args
call preempt_schedule_irq
jmp exit_intr
-#endif
+#endif
CFI_ENDPROC
END(common_interrupt)
-
+
/*
* APIC interrupts.
- */
- .macro apicinterrupt num,func
+ */
+.macro apicinterrupt num sym do_sym
+ENTRY(\sym)
INTR_FRAME
pushq $~(\num)
CFI_ADJUST_CFA_OFFSET 8
- interrupt \func
+ interrupt \do_sym
jmp ret_from_intr
CFI_ENDPROC
- .endm
-
-ENTRY(thermal_interrupt)
- apicinterrupt THERMAL_APIC_VECTOR,smp_thermal_interrupt
-END(thermal_interrupt)
-
-ENTRY(threshold_interrupt)
- apicinterrupt THRESHOLD_APIC_VECTOR,mce_threshold_interrupt
-END(threshold_interrupt)
-
-#ifdef CONFIG_SMP
-ENTRY(reschedule_interrupt)
- apicinterrupt RESCHEDULE_VECTOR,smp_reschedule_interrupt
-END(reschedule_interrupt)
-
- .macro INVALIDATE_ENTRY num
-ENTRY(invalidate_interrupt\num)
- apicinterrupt INVALIDATE_TLB_VECTOR_START+\num,smp_invalidate_interrupt
-END(invalidate_interrupt\num)
- .endm
+END(\sym)
+.endm
- INVALIDATE_ENTRY 0
- INVALIDATE_ENTRY 1
- INVALIDATE_ENTRY 2
- INVALIDATE_ENTRY 3
- INVALIDATE_ENTRY 4
- INVALIDATE_ENTRY 5
- INVALIDATE_ENTRY 6
- INVALIDATE_ENTRY 7
-
-ENTRY(call_function_interrupt)
- apicinterrupt CALL_FUNCTION_VECTOR,smp_call_function_interrupt
-END(call_function_interrupt)
-ENTRY(call_function_single_interrupt)
- apicinterrupt CALL_FUNCTION_SINGLE_VECTOR,smp_call_function_single_interrupt
-END(call_function_single_interrupt)
-ENTRY(irq_move_cleanup_interrupt)
- apicinterrupt IRQ_MOVE_CLEANUP_VECTOR,smp_irq_move_cleanup_interrupt
-END(irq_move_cleanup_interrupt)
+#ifdef CONFIG_SMP
+apicinterrupt IRQ_MOVE_CLEANUP_VECTOR \
+ irq_move_cleanup_interrupt smp_irq_move_cleanup_interrupt
#endif
-ENTRY(apic_timer_interrupt)
- apicinterrupt LOCAL_TIMER_VECTOR,smp_apic_timer_interrupt
-END(apic_timer_interrupt)
+apicinterrupt UV_BAU_MESSAGE \
+ uv_bau_message_intr1 uv_bau_message_interrupt
+apicinterrupt LOCAL_TIMER_VECTOR \
+ apic_timer_interrupt smp_apic_timer_interrupt
+
+#ifdef CONFIG_SMP
+apicinterrupt INVALIDATE_TLB_VECTOR_START+0 \
+ invalidate_interrupt0 smp_invalidate_interrupt
+apicinterrupt INVALIDATE_TLB_VECTOR_START+1 \
+ invalidate_interrupt1 smp_invalidate_interrupt
+apicinterrupt INVALIDATE_TLB_VECTOR_START+2 \
+ invalidate_interrupt2 smp_invalidate_interrupt
+apicinterrupt INVALIDATE_TLB_VECTOR_START+3 \
+ invalidate_interrupt3 smp_invalidate_interrupt
+apicinterrupt INVALIDATE_TLB_VECTOR_START+4 \
+ invalidate_interrupt4 smp_invalidate_interrupt
+apicinterrupt INVALIDATE_TLB_VECTOR_START+5 \
+ invalidate_interrupt5 smp_invalidate_interrupt
+apicinterrupt INVALIDATE_TLB_VECTOR_START+6 \
+ invalidate_interrupt6 smp_invalidate_interrupt
+apicinterrupt INVALIDATE_TLB_VECTOR_START+7 \
+ invalidate_interrupt7 smp_invalidate_interrupt
+#endif
-ENTRY(uv_bau_message_intr1)
- apicinterrupt 220,uv_bau_message_interrupt
-END(uv_bau_message_intr1)
+apicinterrupt THRESHOLD_APIC_VECTOR \
+ threshold_interrupt mce_threshold_interrupt
+apicinterrupt THERMAL_APIC_VECTOR \
+ thermal_interrupt smp_thermal_interrupt
+
+#ifdef CONFIG_SMP
+apicinterrupt CALL_FUNCTION_SINGLE_VECTOR \
+ call_function_single_interrupt smp_call_function_single_interrupt
+apicinterrupt CALL_FUNCTION_VECTOR \
+ call_function_interrupt smp_call_function_interrupt
+apicinterrupt RESCHEDULE_VECTOR \
+ reschedule_interrupt smp_reschedule_interrupt
+#endif
-ENTRY(error_interrupt)
- apicinterrupt ERROR_APIC_VECTOR,smp_error_interrupt
-END(error_interrupt)
+apicinterrupt ERROR_APIC_VECTOR \
+ error_interrupt smp_error_interrupt
+apicinterrupt SPURIOUS_APIC_VECTOR \
+ spurious_interrupt smp_spurious_interrupt
-ENTRY(spurious_interrupt)
- apicinterrupt SPURIOUS_APIC_VECTOR,smp_spurious_interrupt
-END(spurious_interrupt)
-
/*
* Exception entry points.
- */
- .macro zeroentry sym
+ */
+.macro zeroentry sym do_sym
+ENTRY(\sym)
INTR_FRAME
PARAVIRT_ADJUST_EXCEPTION_FRAME
- pushq $0 /* push error code/oldrax */
- CFI_ADJUST_CFA_OFFSET 8
- pushq %rax /* push real oldrax to the rdi slot */
- CFI_ADJUST_CFA_OFFSET 8
- CFI_REL_OFFSET rax,0
- leaq \sym(%rip),%rax
- jmp error_entry
+ pushq_cfi $-1 /* ORIG_RAX: no syscall to restart */
+ subq $15*8,%rsp
+ CFI_ADJUST_CFA_OFFSET 15*8
+ call error_entry
+ DEFAULT_FRAME 0
+ movq %rsp,%rdi /* pt_regs pointer */
+ xorl %esi,%esi /* no error code */
+ call \do_sym
+ jmp error_exit /* %ebx: no swapgs flag */
CFI_ENDPROC
- .endm
+END(\sym)
+.endm
- .macro errorentry sym
- XCPT_FRAME
+.macro paranoidzeroentry sym do_sym
+ENTRY(\sym)
+ INTR_FRAME
PARAVIRT_ADJUST_EXCEPTION_FRAME
- pushq %rax
+ pushq $-1 /* ORIG_RAX: no syscall to restart */
CFI_ADJUST_CFA_OFFSET 8
- CFI_REL_OFFSET rax,0
- leaq \sym(%rip),%rax
- jmp error_entry
+ subq $15*8, %rsp
+ call save_paranoid
+ TRACE_IRQS_OFF
+ movq %rsp,%rdi /* pt_regs pointer */
+ xorl %esi,%esi /* no error code */
+ call \do_sym
+ jmp paranoid_exit /* %ebx: no swapgs flag */
CFI_ENDPROC
- .endm
+END(\sym)
+.endm
- /* error code is on the stack already */
- /* handle NMI like exceptions that can happen everywhere */
- .macro paranoidentry sym, ist=0, irqtrace=1
- SAVE_ALL
- cld
- movl $1,%ebx
- movl $MSR_GS_BASE,%ecx
- rdmsr
- testl %edx,%edx
- js 1f
- SWAPGS
- xorl %ebx,%ebx
-1:
- .if \ist
- movq %gs:pda_data_offset, %rbp
- .endif
- .if \irqtrace
- TRACE_IRQS_OFF
- .endif
- movq %rsp,%rdi
- movq ORIG_RAX(%rsp),%rsi
- movq $-1,ORIG_RAX(%rsp)
- .if \ist
- subq $EXCEPTION_STKSZ, per_cpu__init_tss + TSS_ist + (\ist - 1) * 8(%rbp)
- .endif
- call \sym
- .if \ist
- addq $EXCEPTION_STKSZ, per_cpu__init_tss + TSS_ist + (\ist - 1) * 8(%rbp)
- .endif
- DISABLE_INTERRUPTS(CLBR_NONE)
- .if \irqtrace
+.macro paranoidzeroentry_ist sym do_sym ist
+ENTRY(\sym)
+ INTR_FRAME
+ PARAVIRT_ADJUST_EXCEPTION_FRAME
+ pushq $-1 /* ORIG_RAX: no syscall to restart */
+ CFI_ADJUST_CFA_OFFSET 8
+ subq $15*8, %rsp
+ call save_paranoid
TRACE_IRQS_OFF
- .endif
- .endm
+ movq %rsp,%rdi /* pt_regs pointer */
+ xorl %esi,%esi /* no error code */
+ movq %gs:pda_data_offset, %rbp
+ subq $EXCEPTION_STKSZ, per_cpu__init_tss + TSS_ist + (\ist - 1) * 8(%rbp)
+ call \do_sym
+ addq $EXCEPTION_STKSZ, per_cpu__init_tss + TSS_ist + (\ist - 1) * 8(%rbp)
+ jmp paranoid_exit /* %ebx: no swapgs flag */
+ CFI_ENDPROC
+END(\sym)
+.endm
- /*
- * "Paranoid" exit path from exception stack.
- * Paranoid because this is used by NMIs and cannot take
- * any kernel state for granted.
- * We don't do kernel preemption checks here, because only
- * NMI should be common and it does not enable IRQs and
- * cannot get reschedule ticks.
- *
- * "trace" is 0 for the NMI handler only, because irq-tracing
- * is fundamentally NMI-unsafe. (we cannot change the soft and
- * hard flags at once, atomically)
- */
- .macro paranoidexit trace=1
- /* ebx: no swapgs flag */
-paranoid_exit\trace:
- testl %ebx,%ebx /* swapgs needed? */
- jnz paranoid_restore\trace
- testl $3,CS(%rsp)
- jnz paranoid_userspace\trace
-paranoid_swapgs\trace:
- .if \trace
- TRACE_IRQS_IRETQ 0
- .endif
- SWAPGS_UNSAFE_STACK
-paranoid_restore\trace:
- RESTORE_ALL 8
- jmp irq_return
-paranoid_userspace\trace:
- GET_THREAD_INFO(%rcx)
- movl TI_flags(%rcx),%ebx
- andl $_TIF_WORK_MASK,%ebx
- jz paranoid_swapgs\trace
- movq %rsp,%rdi /* &pt_regs */
- call sync_regs
- movq %rax,%rsp /* switch stack for scheduling */
- testl $_TIF_NEED_RESCHED,%ebx
- jnz paranoid_schedule\trace
- movl %ebx,%edx /* arg3: thread flags */
- .if \trace
- TRACE_IRQS_ON
- .endif
- ENABLE_INTERRUPTS(CLBR_NONE)
- xorl %esi,%esi /* arg2: oldset */
- movq %rsp,%rdi /* arg1: &pt_regs */
- call do_notify_resume
- DISABLE_INTERRUPTS(CLBR_NONE)
- .if \trace
- TRACE_IRQS_OFF
- .endif
- jmp paranoid_userspace\trace
-paranoid_schedule\trace:
- .if \trace
- TRACE_IRQS_ON
- .endif
- ENABLE_INTERRUPTS(CLBR_ANY)
- call schedule
- DISABLE_INTERRUPTS(CLBR_ANY)
- .if \trace
- TRACE_IRQS_OFF
- .endif
- jmp paranoid_userspace\trace
+.macro errorentry sym do_sym
+ENTRY(\sym)
+ XCPT_FRAME
+ PARAVIRT_ADJUST_EXCEPTION_FRAME
+ subq $15*8,%rsp
+ CFI_ADJUST_CFA_OFFSET 15*8
+ call error_entry
+ DEFAULT_FRAME 0
+ movq %rsp,%rdi /* pt_regs pointer */
+ movq ORIG_RAX(%rsp),%rsi /* get error code */
+ movq $-1,ORIG_RAX(%rsp) /* no syscall to restart */
+ call \do_sym
+ jmp error_exit /* %ebx: no swapgs flag */
CFI_ENDPROC
- .endm
+END(\sym)
+.endm
-/*
- * Exception entry point. This expects an error code/orig_rax on the stack
- * and the exception handler in %rax.
- */
-KPROBE_ENTRY(error_entry)
- _frame RDI
- CFI_REL_OFFSET rax,0
- /* rdi slot contains rax, oldrax contains error code */
- cld
- subq $14*8,%rsp
- CFI_ADJUST_CFA_OFFSET (14*8)
- movq %rsi,13*8(%rsp)
- CFI_REL_OFFSET rsi,RSI
- movq 14*8(%rsp),%rsi /* load rax from rdi slot */
- CFI_REGISTER rax,rsi
- movq %rdx,12*8(%rsp)
- CFI_REL_OFFSET rdx,RDX
- movq %rcx,11*8(%rsp)
- CFI_REL_OFFSET rcx,RCX
- movq %rsi,10*8(%rsp) /* store rax */
- CFI_REL_OFFSET rax,RAX
- movq %r8, 9*8(%rsp)
- CFI_REL_OFFSET r8,R8
- movq %r9, 8*8(%rsp)
- CFI_REL_OFFSET r9,R9
- movq %r10,7*8(%rsp)
- CFI_REL_OFFSET r10,R10
- movq %r11,6*8(%rsp)
- CFI_REL_OFFSET r11,R11
- movq %rbx,5*8(%rsp)
- CFI_REL_OFFSET rbx,RBX
- movq %rbp,4*8(%rsp)
- CFI_REL_OFFSET rbp,RBP
- movq %r12,3*8(%rsp)
- CFI_REL_OFFSET r12,R12
- movq %r13,2*8(%rsp)
- CFI_REL_OFFSET r13,R13
- movq %r14,1*8(%rsp)
- CFI_REL_OFFSET r14,R14
- movq %r15,(%rsp)
- CFI_REL_OFFSET r15,R15
- xorl %ebx,%ebx
- testl $3,CS(%rsp)
- je error_kernelspace
-error_swapgs:
- SWAPGS
-error_sti:
- TRACE_IRQS_OFF
- movq %rdi,RDI(%rsp)
- CFI_REL_OFFSET rdi,RDI
- movq %rsp,%rdi
- movq ORIG_RAX(%rsp),%rsi /* get error code */
- movq $-1,ORIG_RAX(%rsp)
- call *%rax
- /* ebx: no swapgs flag (1: don't need swapgs, 0: need it) */
-error_exit:
- movl %ebx,%eax
- RESTORE_REST
- DISABLE_INTERRUPTS(CLBR_NONE)
+ /* error code is on the stack already */
+.macro paranoiderrorentry sym do_sym
+ENTRY(\sym)
+ XCPT_FRAME
+ PARAVIRT_ADJUST_EXCEPTION_FRAME
+ subq $15*8,%rsp
+ CFI_ADJUST_CFA_OFFSET 15*8
+ call save_paranoid
+ DEFAULT_FRAME 0
TRACE_IRQS_OFF
- GET_THREAD_INFO(%rcx)
- testl %eax,%eax
- jne retint_kernel
- LOCKDEP_SYS_EXIT_IRQ
- movl TI_flags(%rcx),%edx
- movl $_TIF_WORK_MASK,%edi
- andl %edi,%edx
- jnz retint_careful
- jmp retint_swapgs
+ movq %rsp,%rdi /* pt_regs pointer */
+ movq ORIG_RAX(%rsp),%rsi /* get error code */
+ movq $-1,ORIG_RAX(%rsp) /* no syscall to restart */
+ call \do_sym
+ jmp paranoid_exit /* %ebx: no swapgs flag */
CFI_ENDPROC
+END(\sym)
+.endm
-error_kernelspace:
- incl %ebx
- /* There are two places in the kernel that can potentially fault with
- usergs. Handle them here. The exception handlers after
- iret run with kernel gs again, so don't set the user space flag.
- B stepping K8s sometimes report an truncated RIP for IRET
- exceptions returning to compat mode. Check for these here too. */
- leaq irq_return(%rip),%rcx
- cmpq %rcx,RIP(%rsp)
- je error_swapgs
- movl %ecx,%ecx /* zero extend */
- cmpq %rcx,RIP(%rsp)
- je error_swapgs
- cmpq $gs_change,RIP(%rsp)
- je error_swapgs
- jmp error_sti
-KPROBE_END(error_entry)
-
- /* Reload gs selector with exception handling */
- /* edi: new selector */
+zeroentry divide_error do_divide_error
+zeroentry overflow do_overflow
+zeroentry bounds do_bounds
+zeroentry invalid_op do_invalid_op
+zeroentry device_not_available do_device_not_available
+paranoiderrorentry double_fault do_double_fault
+zeroentry coprocessor_segment_overrun do_coprocessor_segment_overrun
+errorentry invalid_TSS do_invalid_TSS
+errorentry segment_not_present do_segment_not_present
+zeroentry spurious_interrupt_bug do_spurious_interrupt_bug
+zeroentry coprocessor_error do_coprocessor_error
+errorentry alignment_check do_alignment_check
+zeroentry simd_coprocessor_error do_simd_coprocessor_error
+
+ /* Reload gs selector with exception handling */
+ /* edi: new selector */
ENTRY(native_load_gs_index)
CFI_STARTPROC
pushf
CFI_ADJUST_CFA_OFFSET 8
DISABLE_INTERRUPTS(CLBR_ANY | ~(CLBR_RDI))
- SWAPGS
-gs_change:
- movl %edi,%gs
+ SWAPGS
+gs_change:
+ movl %edi,%gs
2: mfence /* workaround */
SWAPGS
- popf
+ popf
CFI_ADJUST_CFA_OFFSET -8
- ret
+ ret
CFI_ENDPROC
-ENDPROC(native_load_gs_index)
-
- .section __ex_table,"a"
- .align 8
- .quad gs_change,bad_gs
- .previous
- .section .fixup,"ax"
+END(native_load_gs_index)
+
+ .section __ex_table,"a"
+ .align 8
+ .quad gs_change,bad_gs
+ .previous
+ .section .fixup,"ax"
/* running with kernelgs */
-bad_gs:
+bad_gs:
SWAPGS /* switch back to user gs */
xorl %eax,%eax
- movl %eax,%gs
- jmp 2b
- .previous
-
+ movl %eax,%gs
+ jmp 2b
+ .previous
+
/*
* Create a kernel thread.
*
@@ -1221,7 +1184,7 @@ ENTRY(kernel_thread)
xorl %r8d,%r8d
xorl %r9d,%r9d
-
+
# clone now
call do_fork
movq %rax,RAX(%rsp)
@@ -1232,15 +1195,15 @@ ENTRY(kernel_thread)
* so internally to the x86_64 port you can rely on kernel_thread()
* not to reschedule the child before returning, this avoids the need
* of hacks for example to fork off the per-CPU idle tasks.
- * [Hopefully no generic code relies on the reschedule -AK]
+ * [Hopefully no generic code relies on the reschedule -AK]
*/
RESTORE_ALL
UNFAKE_STACK_FRAME
ret
CFI_ENDPROC
-ENDPROC(kernel_thread)
-
-child_rip:
+END(kernel_thread)
+
+ENTRY(child_rip)
pushq $0 # fake return address
CFI_STARTPROC
/*
@@ -1253,8 +1216,9 @@ child_rip:
# exit
mov %eax, %edi
call do_exit
+ ud2 # padding for call trace
CFI_ENDPROC
-ENDPROC(child_rip)
+END(child_rip)
/*
* execve(). This function needs to use IRET, not SYSRET, to set up all state properly.
@@ -1274,10 +1238,10 @@ ENDPROC(child_rip)
ENTRY(kernel_execve)
CFI_STARTPROC
FAKE_STACK_FRAME $0
- SAVE_ALL
+ SAVE_ALL
movq %rsp,%rcx
call sys_execve
- movq %rax, RAX(%rsp)
+ movq %rax, RAX(%rsp)
RESTORE_REST
testq %rax,%rax
je int_ret_from_sys_call
@@ -1285,129 +1249,7 @@ ENTRY(kernel_execve)
UNFAKE_STACK_FRAME
ret
CFI_ENDPROC
-ENDPROC(kernel_execve)
-
-KPROBE_ENTRY(page_fault)
- errorentry do_page_fault
-KPROBE_END(page_fault)
-
-ENTRY(coprocessor_error)
- zeroentry do_coprocessor_error
-END(coprocessor_error)
-
-ENTRY(simd_coprocessor_error)
- zeroentry do_simd_coprocessor_error
-END(simd_coprocessor_error)
-
-ENTRY(device_not_available)
- zeroentry do_device_not_available
-END(device_not_available)
-
- /* runs on exception stack */
-KPROBE_ENTRY(debug)
- INTR_FRAME
- PARAVIRT_ADJUST_EXCEPTION_FRAME
- pushq $0
- CFI_ADJUST_CFA_OFFSET 8
- paranoidentry do_debug, DEBUG_STACK
- paranoidexit
-KPROBE_END(debug)
-
- /* runs on exception stack */
-KPROBE_ENTRY(nmi)
- INTR_FRAME
- PARAVIRT_ADJUST_EXCEPTION_FRAME
- pushq $-1
- CFI_ADJUST_CFA_OFFSET 8
- paranoidentry do_nmi, 0, 0
-#ifdef CONFIG_TRACE_IRQFLAGS
- paranoidexit 0
-#else
- jmp paranoid_exit1
- CFI_ENDPROC
-#endif
-KPROBE_END(nmi)
-
-KPROBE_ENTRY(int3)
- INTR_FRAME
- PARAVIRT_ADJUST_EXCEPTION_FRAME
- pushq $0
- CFI_ADJUST_CFA_OFFSET 8
- paranoidentry do_int3, DEBUG_STACK
- jmp paranoid_exit1
- CFI_ENDPROC
-KPROBE_END(int3)
-
-ENTRY(overflow)
- zeroentry do_overflow
-END(overflow)
-
-ENTRY(bounds)
- zeroentry do_bounds
-END(bounds)
-
-ENTRY(invalid_op)
- zeroentry do_invalid_op
-END(invalid_op)
-
-ENTRY(coprocessor_segment_overrun)
- zeroentry do_coprocessor_segment_overrun
-END(coprocessor_segment_overrun)
-
- /* runs on exception stack */
-ENTRY(double_fault)
- XCPT_FRAME
- PARAVIRT_ADJUST_EXCEPTION_FRAME
- paranoidentry do_double_fault
- jmp paranoid_exit1
- CFI_ENDPROC
-END(double_fault)
-
-ENTRY(invalid_TSS)
- errorentry do_invalid_TSS
-END(invalid_TSS)
-
-ENTRY(segment_not_present)
- errorentry do_segment_not_present
-END(segment_not_present)
-
- /* runs on exception stack */
-ENTRY(stack_segment)
- XCPT_FRAME
- PARAVIRT_ADJUST_EXCEPTION_FRAME
- paranoidentry do_stack_segment
- jmp paranoid_exit1
- CFI_ENDPROC
-END(stack_segment)
-
-KPROBE_ENTRY(general_protection)
- errorentry do_general_protection
-KPROBE_END(general_protection)
-
-ENTRY(alignment_check)
- errorentry do_alignment_check
-END(alignment_check)
-
-ENTRY(divide_error)
- zeroentry do_divide_error
-END(divide_error)
-
-ENTRY(spurious_interrupt_bug)
- zeroentry do_spurious_interrupt_bug
-END(spurious_interrupt_bug)
-
-#ifdef CONFIG_X86_MCE
- /* runs on exception stack */
-ENTRY(machine_check)
- INTR_FRAME
- PARAVIRT_ADJUST_EXCEPTION_FRAME
- pushq $0
- CFI_ADJUST_CFA_OFFSET 8
- paranoidentry do_machine_check
- jmp paranoid_exit1
- CFI_ENDPROC
-END(machine_check)
-#endif
+END(kernel_execve)
/* Call softirq on interrupt stack. Interrupts are off. */
ENTRY(call_softirq)
@@ -1427,40 +1269,33 @@ ENTRY(call_softirq)
decl %gs:pda_irqcount
ret
CFI_ENDPROC
-ENDPROC(call_softirq)
-
-KPROBE_ENTRY(ignore_sysret)
- CFI_STARTPROC
- mov $-ENOSYS,%eax
- sysret
- CFI_ENDPROC
-ENDPROC(ignore_sysret)
+END(call_softirq)
#ifdef CONFIG_XEN
-ENTRY(xen_hypervisor_callback)
- zeroentry xen_do_hypervisor_callback
-END(xen_hypervisor_callback)
+zeroentry xen_hypervisor_callback xen_do_hypervisor_callback
/*
-# A note on the "critical region" in our callback handler.
-# We want to avoid stacking callback handlers due to events occurring
-# during handling of the last event. To do this, we keep events disabled
-# until we've done all processing. HOWEVER, we must enable events before
-# popping the stack frame (can't be done atomically) and so it would still
-# be possible to get enough handler activations to overflow the stack.
-# Although unlikely, bugs of that kind are hard to track down, so we'd
-# like to avoid the possibility.
-# So, on entry to the handler we detect whether we interrupted an
-# existing activation in its critical region -- if so, we pop the current
-# activation and restart the handler using the previous one.
-*/
+ * A note on the "critical region" in our callback handler.
+ * We want to avoid stacking callback handlers due to events occurring
+ * during handling of the last event. To do this, we keep events disabled
+ * until we've done all processing. HOWEVER, we must enable events before
+ * popping the stack frame (can't be done atomically) and so it would still
+ * be possible to get enough handler activations to overflow the stack.
+ * Although unlikely, bugs of that kind are hard to track down, so we'd
+ * like to avoid the possibility.
+ * So, on entry to the handler we detect whether we interrupted an
+ * existing activation in its critical region -- if so, we pop the current
+ * activation and restart the handler using the previous one.
+ */
ENTRY(xen_do_hypervisor_callback) # do_hypervisor_callback(struct *pt_regs)
CFI_STARTPROC
-/* Since we don't modify %rdi, evtchn_do_upall(struct *pt_regs) will
- see the correct pointer to the pt_regs */
+/*
+ * Since we don't modify %rdi, evtchn_do_upall(struct *pt_regs) will
+ * see the correct pointer to the pt_regs
+ */
movq %rdi, %rsp # we don't return, adjust the stack frame
CFI_ENDPROC
- CFI_DEFAULT_STACK
+ DEFAULT_FRAME
11: incl %gs:pda_irqcount
movq %rsp,%rbp
CFI_DEF_CFA_REGISTER rbp
@@ -1475,23 +1310,26 @@ ENTRY(xen_do_hypervisor_callback) # do_hypervisor_callback(struct *pt_regs)
END(do_hypervisor_callback)
/*
-# Hypervisor uses this for application faults while it executes.
-# We get here for two reasons:
-# 1. Fault while reloading DS, ES, FS or GS
-# 2. Fault while executing IRET
-# Category 1 we do not need to fix up as Xen has already reloaded all segment
-# registers that could be reloaded and zeroed the others.
-# Category 2 we fix up by killing the current process. We cannot use the
-# normal Linux return path in this case because if we use the IRET hypercall
-# to pop the stack frame we end up in an infinite loop of failsafe callbacks.
-# We distinguish between categories by comparing each saved segment register
-# with its current contents: any discrepancy means we in category 1.
-*/
+ * Hypervisor uses this for application faults while it executes.
+ * We get here for two reasons:
+ * 1. Fault while reloading DS, ES, FS or GS
+ * 2. Fault while executing IRET
+ * Category 1 we do not need to fix up as Xen has already reloaded all segment
+ * registers that could be reloaded and zeroed the others.
+ * Category 2 we fix up by killing the current process. We cannot use the
+ * normal Linux return path in this case because if we use the IRET hypercall
+ * to pop the stack frame we end up in an infinite loop of failsafe callbacks.
+ * We distinguish between categories by comparing each saved segment register
+ * with its current contents: any discrepancy means we in category 1.
+ */
ENTRY(xen_failsafe_callback)
- framesz = (RIP-0x30) /* workaround buggy gas */
- _frame framesz
- CFI_REL_OFFSET rcx, 0
- CFI_REL_OFFSET r11, 8
+ INTR_FRAME 1 (6*8)
+ /*CFI_REL_OFFSET gs,GS*/
+ /*CFI_REL_OFFSET fs,FS*/
+ /*CFI_REL_OFFSET es,ES*/
+ /*CFI_REL_OFFSET ds,DS*/
+ CFI_REL_OFFSET r11,8
+ CFI_REL_OFFSET rcx,0
movw %ds,%cx
cmpw %cx,0x10(%rsp)
CFI_REMEMBER_STATE
@@ -1512,12 +1350,9 @@ ENTRY(xen_failsafe_callback)
CFI_RESTORE r11
addq $0x30,%rsp
CFI_ADJUST_CFA_OFFSET -0x30
- pushq $0
- CFI_ADJUST_CFA_OFFSET 8
- pushq %r11
- CFI_ADJUST_CFA_OFFSET 8
- pushq %rcx
- CFI_ADJUST_CFA_OFFSET 8
+ pushq_cfi $0 /* RIP */
+ pushq_cfi %r11
+ pushq_cfi %rcx
jmp general_protection
CFI_RESTORE_STATE
1: /* Segment mismatch => Category 1 (Bad segment). Retry the IRET. */
@@ -1527,11 +1362,223 @@ ENTRY(xen_failsafe_callback)
CFI_RESTORE r11
addq $0x30,%rsp
CFI_ADJUST_CFA_OFFSET -0x30
- pushq $0
- CFI_ADJUST_CFA_OFFSET 8
+ pushq_cfi $0
SAVE_ALL
jmp error_exit
CFI_ENDPROC
END(xen_failsafe_callback)
#endif /* CONFIG_XEN */
+
+/*
+ * Some functions should be protected against kprobes
+ */
+ .pushsection .kprobes.text, "ax"
+
+paranoidzeroentry_ist debug do_debug DEBUG_STACK
+paranoidzeroentry_ist int3 do_int3 DEBUG_STACK
+paranoiderrorentry stack_segment do_stack_segment
+errorentry general_protection do_general_protection
+errorentry page_fault do_page_fault
+#ifdef CONFIG_X86_MCE
+paranoidzeroentry machine_check do_machine_check
+#endif
+
+ /*
+ * "Paranoid" exit path from exception stack.
+ * Paranoid because this is used by NMIs and cannot take
+ * any kernel state for granted.
+ * We don't do kernel preemption checks here, because only
+ * NMI should be common and it does not enable IRQs and
+ * cannot get reschedule ticks.
+ *
+ * "trace" is 0 for the NMI handler only, because irq-tracing
+ * is fundamentally NMI-unsafe. (we cannot change the soft and
+ * hard flags at once, atomically)
+ */
+
+ /* ebx: no swapgs flag */
+ENTRY(paranoid_exit)
+ INTR_FRAME
+ DISABLE_INTERRUPTS(CLBR_NONE)
+ TRACE_IRQS_OFF
+ testl %ebx,%ebx /* swapgs needed? */
+ jnz paranoid_restore
+ testl $3,CS(%rsp)
+ jnz paranoid_userspace
+paranoid_swapgs:
+ TRACE_IRQS_IRETQ 0
+ SWAPGS_UNSAFE_STACK
+paranoid_restore:
+ RESTORE_ALL 8
+ jmp irq_return
+paranoid_userspace:
+ GET_THREAD_INFO(%rcx)
+ movl TI_flags(%rcx),%ebx
+ andl $_TIF_WORK_MASK,%ebx
+ jz paranoid_swapgs
+ movq %rsp,%rdi /* &pt_regs */
+ call sync_regs
+ movq %rax,%rsp /* switch stack for scheduling */
+ testl $_TIF_NEED_RESCHED,%ebx
+ jnz paranoid_schedule
+ movl %ebx,%edx /* arg3: thread flags */
+ TRACE_IRQS_ON
+ ENABLE_INTERRUPTS(CLBR_NONE)
+ xorl %esi,%esi /* arg2: oldset */
+ movq %rsp,%rdi /* arg1: &pt_regs */
+ call do_notify_resume
+ DISABLE_INTERRUPTS(CLBR_NONE)
+ TRACE_IRQS_OFF
+ jmp paranoid_userspace
+paranoid_schedule:
+ TRACE_IRQS_ON
+ ENABLE_INTERRUPTS(CLBR_ANY)
+ call schedule
+ DISABLE_INTERRUPTS(CLBR_ANY)
+ TRACE_IRQS_OFF
+ jmp paranoid_userspace
+ CFI_ENDPROC
+END(paranoid_exit)
+
+/*
+ * Exception entry point. This expects an error code/orig_rax on the stack.
+ * returns in "no swapgs flag" in %ebx.
+ */
+ENTRY(error_entry)
+ XCPT_FRAME
+ CFI_ADJUST_CFA_OFFSET 15*8
+ /* oldrax contains error code */
+ cld
+ movq_cfi rdi, RDI+8
+ movq_cfi rsi, RSI+8
+ movq_cfi rdx, RDX+8
+ movq_cfi rcx, RCX+8
+ movq_cfi rax, RAX+8
+ movq_cfi r8, R8+8
+ movq_cfi r9, R9+8
+ movq_cfi r10, R10+8
+ movq_cfi r11, R11+8
+ movq_cfi rbx, RBX+8
+ movq_cfi rbp, RBP+8
+ movq_cfi r12, R12+8
+ movq_cfi r13, R13+8
+ movq_cfi r14, R14+8
+ movq_cfi r15, R15+8
+ xorl %ebx,%ebx
+ testl $3,CS+8(%rsp)
+ je error_kernelspace
+error_swapgs:
+ SWAPGS
+error_sti:
+ TRACE_IRQS_OFF
+ ret
+ CFI_ENDPROC
+
+/*
+ * There are two places in the kernel that can potentially fault with
+ * usergs. Handle them here. The exception handlers after iret run with
+ * kernel gs again, so don't set the user space flag. B stepping K8s
+ * sometimes report an truncated RIP for IRET exceptions returning to
+ * compat mode. Check for these here too.
+ */
+error_kernelspace:
+ incl %ebx
+ leaq irq_return(%rip),%rcx
+ cmpq %rcx,RIP+8(%rsp)
+ je error_swapgs
+ movl %ecx,%ecx /* zero extend */
+ cmpq %rcx,RIP+8(%rsp)
+ je error_swapgs
+ cmpq $gs_change,RIP+8(%rsp)
+ je error_swapgs
+ jmp error_sti
+END(error_entry)
+
+
+/* ebx: no swapgs flag (1: don't need swapgs, 0: need it) */
+ENTRY(error_exit)
+ DEFAULT_FRAME
+ movl %ebx,%eax
+ RESTORE_REST
+ DISABLE_INTERRUPTS(CLBR_NONE)
+ TRACE_IRQS_OFF
+ GET_THREAD_INFO(%rcx)
+ testl %eax,%eax
+ jne retint_kernel
+ LOCKDEP_SYS_EXIT_IRQ
+ movl TI_flags(%rcx),%edx
+ movl $_TIF_WORK_MASK,%edi
+ andl %edi,%edx
+ jnz retint_careful
+ jmp retint_swapgs
+ CFI_ENDPROC
+END(error_exit)
+
+
+ /* runs on exception stack */
+ENTRY(nmi)
+ INTR_FRAME
+ PARAVIRT_ADJUST_EXCEPTION_FRAME
+ pushq_cfi $-1
+ subq $15*8, %rsp
+ CFI_ADJUST_CFA_OFFSET 15*8
+ call save_paranoid
+ DEFAULT_FRAME 0
+ /* paranoidentry do_nmi, 0; without TRACE_IRQS_OFF */
+ movq %rsp,%rdi
+ movq $-1,%rsi
+ call do_nmi
+#ifdef CONFIG_TRACE_IRQFLAGS
+ /* paranoidexit; without TRACE_IRQS_OFF */
+ /* ebx: no swapgs flag */
+ DISABLE_INTERRUPTS(CLBR_NONE)
+ testl %ebx,%ebx /* swapgs needed? */
+ jnz nmi_restore
+ testl $3,CS(%rsp)
+ jnz nmi_userspace
+nmi_swapgs:
+ SWAPGS_UNSAFE_STACK
+nmi_restore:
+ RESTORE_ALL 8
+ jmp irq_return
+nmi_userspace:
+ GET_THREAD_INFO(%rcx)
+ movl TI_flags(%rcx),%ebx
+ andl $_TIF_WORK_MASK,%ebx
+ jz nmi_swapgs
+ movq %rsp,%rdi /* &pt_regs */
+ call sync_regs
+ movq %rax,%rsp /* switch stack for scheduling */
+ testl $_TIF_NEED_RESCHED,%ebx
+ jnz nmi_schedule
+ movl %ebx,%edx /* arg3: thread flags */
+ ENABLE_INTERRUPTS(CLBR_NONE)
+ xorl %esi,%esi /* arg2: oldset */
+ movq %rsp,%rdi /* arg1: &pt_regs */
+ call do_notify_resume
+ DISABLE_INTERRUPTS(CLBR_NONE)
+ jmp nmi_userspace
+nmi_schedule:
+ ENABLE_INTERRUPTS(CLBR_ANY)
+ call schedule
+ DISABLE_INTERRUPTS(CLBR_ANY)
+ jmp nmi_userspace
+ CFI_ENDPROC
+#else
+ jmp paranoid_exit
+ CFI_ENDPROC
+#endif
+END(nmi)
+
+ENTRY(ignore_sysret)
+ CFI_STARTPROC
+ mov $-ENOSYS,%eax
+ sysret
+ CFI_ENDPROC
+END(ignore_sysret)
+
+/*
+ * End of kprobes section
+ */
+ .popsection
diff --git a/arch/x86/kernel/genx2apic_uv_x.c b/arch/x86/kernel/genx2apic_uv_x.c
index 0e88be11227..b193e082f6c 100644
--- a/arch/x86/kernel/genx2apic_uv_x.c
+++ b/arch/x86/kernel/genx2apic_uv_x.c
@@ -10,6 +10,7 @@
#include <linux/kernel.h>
#include <linux/threads.h>
+#include <linux/cpu.h>
#include <linux/cpumask.h>
#include <linux/string.h>
#include <linux/ctype.h>
@@ -17,6 +18,9 @@
#include <linux/sched.h>
#include <linux/module.h>
#include <linux/hardirq.h>
+#include <linux/timer.h>
+#include <linux/proc_fs.h>
+#include <asm/current.h>
#include <asm/smp.h>
#include <asm/ipi.h>
#include <asm/genapic.h>
@@ -383,6 +387,103 @@ static __init void uv_rtc_init(void)
}
/*
+ * percpu heartbeat timer
+ */
+static void uv_heartbeat(unsigned long ignored)
+{
+ struct timer_list *timer = &uv_hub_info->scir.timer;
+ unsigned char bits = uv_hub_info->scir.state;
+
+ /* flip heartbeat bit */
+ bits ^= SCIR_CPU_HEARTBEAT;
+
+ /* is this cpu idle? */
+ if (idle_cpu(raw_smp_processor_id()))
+ bits &= ~SCIR_CPU_ACTIVITY;
+ else
+ bits |= SCIR_CPU_ACTIVITY;
+
+ /* update system controller interface reg */
+ uv_set_scir_bits(bits);
+
+ /* enable next timer period */
+ mod_timer(timer, jiffies + SCIR_CPU_HB_INTERVAL);
+}
+
+static void __cpuinit uv_heartbeat_enable(int cpu)
+{
+ if (!uv_cpu_hub_info(cpu)->scir.enabled) {
+ struct timer_list *timer = &uv_cpu_hub_info(cpu)->scir.timer;
+
+ uv_set_cpu_scir_bits(cpu, SCIR_CPU_HEARTBEAT|SCIR_CPU_ACTIVITY);
+ setup_timer(timer, uv_heartbeat, cpu);
+ timer->expires = jiffies + SCIR_CPU_HB_INTERVAL;
+ add_timer_on(timer, cpu);
+ uv_cpu_hub_info(cpu)->scir.enabled = 1;
+ }
+
+ /* check boot cpu */
+ if (!uv_cpu_hub_info(0)->scir.enabled)
+ uv_heartbeat_enable(0);
+}
+
+#ifdef CONFIG_HOTPLUG_CPU
+static void __cpuinit uv_heartbeat_disable(int cpu)
+{
+ if (uv_cpu_hub_info(cpu)->scir.enabled) {
+ uv_cpu_hub_info(cpu)->scir.enabled = 0;
+ del_timer(&uv_cpu_hub_info(cpu)->scir.timer);
+ }
+ uv_set_cpu_scir_bits(cpu, 0xff);
+}
+
+/*
+ * cpu hotplug notifier
+ */
+static __cpuinit int uv_scir_cpu_notify(struct notifier_block *self,
+ unsigned long action, void *hcpu)
+{
+ long cpu = (long)hcpu;
+
+ switch (action) {
+ case CPU_ONLINE:
+ uv_heartbeat_enable(cpu);
+ break;
+ case CPU_DOWN_PREPARE:
+ uv_heartbeat_disable(cpu);
+ break;
+ default:
+ break;
+ }
+ return NOTIFY_OK;
+}
+
+static __init void uv_scir_register_cpu_notifier(void)
+{
+ hotcpu_notifier(uv_scir_cpu_notify, 0);
+}
+
+#else /* !CONFIG_HOTPLUG_CPU */
+
+static __init void uv_scir_register_cpu_notifier(void)
+{
+}
+
+static __init int uv_init_heartbeat(void)
+{
+ int cpu;
+
+ if (is_uv_system())
+ for_each_online_cpu(cpu)
+ uv_heartbeat_enable(cpu);
+ return 0;
+}
+
+late_initcall(uv_init_heartbeat);
+
+#endif /* !CONFIG_HOTPLUG_CPU */
+
+/*
* Called on each cpu to initialize the per_cpu UV data area.
* ZZZ hotplug not supported yet
*/
@@ -455,7 +556,7 @@ void __init uv_system_init(void)
uv_bios_init();
uv_bios_get_sn_info(0, &uv_type, &sn_partition_id,
- &uv_coherency_id, &uv_region_size);
+ &sn_coherency_id, &sn_region_size);
uv_rtc_init();
for_each_present_cpu(cpu) {
@@ -466,8 +567,7 @@ void __init uv_system_init(void)
uv_blade_info[blade].nr_possible_cpus++;
uv_cpu_hub_info(cpu)->lowmem_remap_base = lowmem_redir_base;
- uv_cpu_hub_info(cpu)->lowmem_remap_top =
- lowmem_redir_base + lowmem_redir_size;
+ uv_cpu_hub_info(cpu)->lowmem_remap_top = lowmem_redir_size;
uv_cpu_hub_info(cpu)->m_val = m_val;
uv_cpu_hub_info(cpu)->n_val = m_val;
uv_cpu_hub_info(cpu)->numa_blade_id = blade;
@@ -477,7 +577,8 @@ void __init uv_system_init(void)
uv_cpu_hub_info(cpu)->gpa_mask = (1 << (m_val + n_val)) - 1;
uv_cpu_hub_info(cpu)->gnode_upper = gnode_upper;
uv_cpu_hub_info(cpu)->global_mmr_base = mmr_base;
- uv_cpu_hub_info(cpu)->coherency_domain_number = uv_coherency_id;
+ uv_cpu_hub_info(cpu)->coherency_domain_number = sn_coherency_id;
+ uv_cpu_hub_info(cpu)->scir.offset = SCIR_LOCAL_MMR_BASE + lcpu;
uv_node_to_blade[nid] = blade;
uv_cpu_to_blade[cpu] = blade;
max_pnode = max(pnode, max_pnode);
@@ -494,4 +595,6 @@ void __init uv_system_init(void)
map_mmioh_high(max_pnode);
uv_cpu_init();
+ uv_scir_register_cpu_notifier();
+ proc_mkdir("sgi_uv", NULL);
}
diff --git a/arch/x86/kernel/head.c b/arch/x86/kernel/head.c
index 1dcb0f13897..3e66bd364a9 100644
--- a/arch/x86/kernel/head.c
+++ b/arch/x86/kernel/head.c
@@ -35,7 +35,6 @@ void __init reserve_ebda_region(void)
/* start of EBDA area */
ebda_addr = get_bios_ebda();
- printk(KERN_INFO "BIOS EBDA/lowmem at: %08x/%08x\n", ebda_addr, lowmem);
/* Fixup: bios puts an EBDA in the top 64K segment */
/* of conventional memory, but does not adjust lowmem. */
diff --git a/arch/x86/kernel/head32.c b/arch/x86/kernel/head32.c
index fa1d25dd83e..ac108d1fe18 100644
--- a/arch/x86/kernel/head32.c
+++ b/arch/x86/kernel/head32.c
@@ -12,9 +12,12 @@
#include <asm/sections.h>
#include <asm/e820.h>
#include <asm/bios_ebda.h>
+#include <asm/trampoline.h>
void __init i386_start_kernel(void)
{
+ reserve_trampoline_memory();
+
reserve_early(__pa_symbol(&_text), __pa_symbol(&_end), "TEXT DATA BSS");
#ifdef CONFIG_BLK_DEV_INITRD
diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c
index d16084f9064..388e05a5fc1 100644
--- a/arch/x86/kernel/head64.c
+++ b/arch/x86/kernel/head64.c
@@ -24,6 +24,7 @@
#include <asm/kdebug.h>
#include <asm/e820.h>
#include <asm/bios_ebda.h>
+#include <asm/trampoline.h>
/* boot cpu pda */
static struct x8664_pda _boot_cpu_pda __read_mostly;
@@ -120,6 +121,8 @@ void __init x86_64_start_reservations(char *real_mode_data)
{
copy_bootdata(__va(real_mode_data));
+ reserve_trampoline_memory();
+
reserve_early(__pa_symbol(&_text), __pa_symbol(&_end), "TEXT DATA BSS");
#ifdef CONFIG_BLK_DEV_INITRD
diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c
index e76d7e27297..cd759ad9069 100644
--- a/arch/x86/kernel/hpet.c
+++ b/arch/x86/kernel/hpet.c
@@ -33,7 +33,9 @@
* HPET address is set in acpi/boot.c, when an ACPI entry exists
*/
unsigned long hpet_address;
-unsigned long hpet_num_timers;
+#ifdef CONFIG_PCI_MSI
+static unsigned long hpet_num_timers;
+#endif
static void __iomem *hpet_virt_address;
struct hpet_dev {
@@ -811,7 +813,7 @@ int __init hpet_enable(void)
out_nohpet:
hpet_clear_mapping();
- boot_hpet_disable = 1;
+ hpet_address = 0;
return 0;
}
@@ -834,10 +836,11 @@ static __init int hpet_late_init(void)
hpet_address = force_hpet_address;
hpet_enable();
- if (!hpet_virt_address)
- return -ENODEV;
}
+ if (!hpet_virt_address)
+ return -ENODEV;
+
hpet_reserve_platform_timers(hpet_readl(HPET_ID));
for_each_online_cpu(cpu) {
diff --git a/arch/x86/kernel/init_task.c b/arch/x86/kernel/init_task.c
index a4f93b4120c..d39918076bb 100644
--- a/arch/x86/kernel/init_task.c
+++ b/arch/x86/kernel/init_task.c
@@ -14,7 +14,6 @@ static struct fs_struct init_fs = INIT_FS;
static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
struct mm_struct init_mm = INIT_MM(init_mm);
-EXPORT_UNUSED_SYMBOL(init_mm); /* will be removed in 2.6.26 */
/*
* Initial thread structure.
diff --git a/arch/x86/kernel/io_apic.c b/arch/x86/kernel/io_apic.c
index 1cbf7c8d46e..3e070bb961d 100644
--- a/arch/x86/kernel/io_apic.c
+++ b/arch/x86/kernel/io_apic.c
@@ -2472,10 +2472,9 @@ static void set_ir_ioapic_affinity_irq(unsigned int irq,
asmlinkage void smp_irq_move_cleanup_interrupt(void)
{
unsigned vector, me;
+
ack_APIC_irq();
-#ifdef CONFIG_X86_64
exit_idle();
-#endif
irq_enter();
me = smp_processor_id();
@@ -2520,7 +2519,7 @@ static void irq_complete_move(struct irq_desc **descp)
if (likely(!cfg->move_desc_pending))
return;
- /* domain is not change, but affinity is changed */
+ /* domain has not changed, but affinity did */
me = smp_processor_id();
if (cpu_isset(me, desc->affinity)) {
*descp = desc = move_irq_desc(desc, me);
diff --git a/arch/x86/kernel/irq_64.c b/arch/x86/kernel/irq_64.c
index fca2991443f..6383d50f82e 100644
--- a/arch/x86/kernel/irq_64.c
+++ b/arch/x86/kernel/irq_64.c
@@ -13,12 +13,12 @@
#include <linux/seq_file.h>
#include <linux/module.h>
#include <linux/delay.h>
+#include <linux/ftrace.h>
#include <asm/uaccess.h>
#include <asm/io_apic.h>
#include <asm/idle.h>
#include <asm/smp.h>
-#ifdef CONFIG_DEBUG_STACKOVERFLOW
/*
* Probabilistic stack overflow check:
*
@@ -28,26 +28,25 @@
*/
static inline void stack_overflow_check(struct pt_regs *regs)
{
+#ifdef CONFIG_DEBUG_STACKOVERFLOW
u64 curbase = (u64)task_stack_page(current);
- static unsigned long warned = -60*HZ;
-
- if (regs->sp >= curbase && regs->sp <= curbase + THREAD_SIZE &&
- regs->sp < curbase + sizeof(struct thread_info) + 128 &&
- time_after(jiffies, warned + 60*HZ)) {
- printk("do_IRQ: %s near stack overflow (cur:%Lx,sp:%lx)\n",
- current->comm, curbase, regs->sp);
- show_stack(NULL,NULL);
- warned = jiffies;
- }
-}
+
+ WARN_ONCE(regs->sp >= curbase &&
+ regs->sp <= curbase + THREAD_SIZE &&
+ regs->sp < curbase + sizeof(struct thread_info) +
+ sizeof(struct pt_regs) + 128,
+
+ "do_IRQ: %s near stack overflow (cur:%Lx,sp:%lx)\n",
+ current->comm, curbase, regs->sp);
#endif
+}
/*
* do_IRQ handles all normal device IRQ's (the special
* SMP cross-CPU interrupts have their own specific
* handlers).
*/
-asmlinkage unsigned int do_IRQ(struct pt_regs *regs)
+asmlinkage unsigned int __irq_entry do_IRQ(struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);
struct irq_desc *desc;
@@ -60,9 +59,7 @@ asmlinkage unsigned int do_IRQ(struct pt_regs *regs)
irq_enter();
irq = __get_cpu_var(vector_irq)[vector];
-#ifdef CONFIG_DEBUG_STACKOVERFLOW
stack_overflow_check(regs);
-#endif
desc = irq_to_desc(irq);
if (likely(desc))
diff --git a/arch/x86/kernel/irqinit_32.c b/arch/x86/kernel/irqinit_32.c
index 61aa2a1004b..84723295f88 100644
--- a/arch/x86/kernel/irqinit_32.c
+++ b/arch/x86/kernel/irqinit_32.c
@@ -140,7 +140,7 @@ void __init native_init_IRQ(void)
for (i = FIRST_EXTERNAL_VECTOR; i < NR_VECTORS; i++) {
/* SYSCALL_VECTOR was reserved in trap_init. */
if (i != SYSCALL_VECTOR)
- set_intr_gate(i, interrupt[i]);
+ set_intr_gate(i, interrupt[i-FIRST_EXTERNAL_VECTOR]);
}
diff --git a/arch/x86/kernel/irqinit_64.c b/arch/x86/kernel/irqinit_64.c
index 1020919efe1..31ebfe38e96 100644
--- a/arch/x86/kernel/irqinit_64.c
+++ b/arch/x86/kernel/irqinit_64.c
@@ -24,41 +24,6 @@
#include <asm/i8259.h>
/*
- * Common place to define all x86 IRQ vectors
- *
- * This builds up the IRQ handler stubs using some ugly macros in irq.h
- *
- * These macros create the low-level assembly IRQ routines that save
- * register context and call do_IRQ(). do_IRQ() then does all the
- * operations that are needed to keep the AT (or SMP IOAPIC)
- * interrupt-controller happy.
- */
-
-#define IRQ_NAME2(nr) nr##_interrupt(void)
-#define IRQ_NAME(nr) IRQ_NAME2(IRQ##nr)
-
-/*
- * SMP has a few special interrupts for IPI messages
- */
-
-#define BUILD_IRQ(nr) \
- asmlinkage void IRQ_NAME(nr); \
- asm("\n.text\n.p2align\n" \
- "IRQ" #nr "_interrupt:\n\t" \
- "push $~(" #nr ") ; " \
- "jmp common_interrupt\n" \
- ".previous");
-
-#define BI(x,y) \
- BUILD_IRQ(x##y)
-
-#define BUILD_16_IRQS(x) \
- BI(x,0) BI(x,1) BI(x,2) BI(x,3) \
- BI(x,4) BI(x,5) BI(x,6) BI(x,7) \
- BI(x,8) BI(x,9) BI(x,a) BI(x,b) \
- BI(x,c) BI(x,d) BI(x,e) BI(x,f)
-
-/*
* ISA PIC or low IO-APIC triggered (INTA-cycle or APIC) interrupts:
* (these are usually mapped to vectors 0x30-0x3f)
*/
@@ -73,37 +38,6 @@
*
* (these are usually mapped into the 0x30-0xff vector range)
*/
- BUILD_16_IRQS(0x2) BUILD_16_IRQS(0x3)
-BUILD_16_IRQS(0x4) BUILD_16_IRQS(0x5) BUILD_16_IRQS(0x6) BUILD_16_IRQS(0x7)
-BUILD_16_IRQS(0x8) BUILD_16_IRQS(0x9) BUILD_16_IRQS(0xa) BUILD_16_IRQS(0xb)
-BUILD_16_IRQS(0xc) BUILD_16_IRQS(0xd) BUILD_16_IRQS(0xe) BUILD_16_IRQS(0xf)
-
-#undef BUILD_16_IRQS
-#undef BI
-
-
-#define IRQ(x,y) \
- IRQ##x##y##_interrupt
-
-#define IRQLIST_16(x) \
- IRQ(x,0), IRQ(x,1), IRQ(x,2), IRQ(x,3), \
- IRQ(x,4), IRQ(x,5), IRQ(x,6), IRQ(x,7), \
- IRQ(x,8), IRQ(x,9), IRQ(x,a), IRQ(x,b), \
- IRQ(x,c), IRQ(x,d), IRQ(x,e), IRQ(x,f)
-
-/* for the irq vectors */
-static void (*__initdata interrupt[NR_VECTORS - FIRST_EXTERNAL_VECTOR])(void) = {
- IRQLIST_16(0x2), IRQLIST_16(0x3),
- IRQLIST_16(0x4), IRQLIST_16(0x5), IRQLIST_16(0x6), IRQLIST_16(0x7),
- IRQLIST_16(0x8), IRQLIST_16(0x9), IRQLIST_16(0xa), IRQLIST_16(0xb),
- IRQLIST_16(0xc), IRQLIST_16(0xd), IRQLIST_16(0xe), IRQLIST_16(0xf)
-};
-
-#undef IRQ
-#undef IRQLIST_16
-
-
-
/*
* IRQ2 is cascade interrupt to second interrupt controller
diff --git a/arch/x86/kernel/microcode_amd.c b/arch/x86/kernel/microcode_amd.c
index 5f8e5d75a25..c25fdb38229 100644
--- a/arch/x86/kernel/microcode_amd.c
+++ b/arch/x86/kernel/microcode_amd.c
@@ -10,7 +10,7 @@
* This driver allows to upgrade microcode on AMD
* family 0x10 and 0x11 processors.
*
- * Licensed unter the terms of the GNU General Public
+ * Licensed under the terms of the GNU General Public
* License version 2. See file COPYING for details.
*/
@@ -32,9 +32,9 @@
#include <linux/platform_device.h>
#include <linux/pci.h>
#include <linux/pci_ids.h>
+#include <linux/uaccess.h>
#include <asm/msr.h>
-#include <asm/uaccess.h>
#include <asm/processor.h>
#include <asm/microcode.h>
@@ -47,43 +47,38 @@ MODULE_LICENSE("GPL v2");
#define UCODE_UCODE_TYPE 0x00000001
struct equiv_cpu_entry {
- unsigned int installed_cpu;
- unsigned int fixed_errata_mask;
- unsigned int fixed_errata_compare;
- unsigned int equiv_cpu;
-};
+ u32 installed_cpu;
+ u32 fixed_errata_mask;
+ u32 fixed_errata_compare;
+ u16 equiv_cpu;
+ u16 res;
+} __attribute__((packed));
struct microcode_header_amd {
- unsigned int data_code;
- unsigned int patch_id;
- unsigned char mc_patch_data_id[2];
- unsigned char mc_patch_data_len;
- unsigned char init_flag;
- unsigned int mc_patch_data_checksum;
- unsigned int nb_dev_id;
- unsigned int sb_dev_id;
- unsigned char processor_rev_id[2];
- unsigned char nb_rev_id;
- unsigned char sb_rev_id;
- unsigned char bios_api_rev;
- unsigned char reserved1[3];
- unsigned int match_reg[8];
-};
+ u32 data_code;
+ u32 patch_id;
+ u16 mc_patch_data_id;
+ u8 mc_patch_data_len;
+ u8 init_flag;
+ u32 mc_patch_data_checksum;
+ u32 nb_dev_id;
+ u32 sb_dev_id;
+ u16 processor_rev_id;
+ u8 nb_rev_id;
+ u8 sb_rev_id;
+ u8 bios_api_rev;
+ u8 reserved1[3];
+ u32 match_reg[8];
+} __attribute__((packed));
struct microcode_amd {
struct microcode_header_amd hdr;
unsigned int mpb[0];
};
-#define UCODE_MAX_SIZE (2048)
-#define DEFAULT_UCODE_DATASIZE (896)
-#define MC_HEADER_SIZE (sizeof(struct microcode_header_amd))
-#define DEFAULT_UCODE_TOTALSIZE (DEFAULT_UCODE_DATASIZE + MC_HEADER_SIZE)
-#define DWSIZE (sizeof(u32))
-/* For now we support a fixed ucode total size only */
-#define get_totalsize(mc) \
- ((((struct microcode_amd *)mc)->hdr.mc_patch_data_len * 28) \
- + MC_HEADER_SIZE)
+#define UCODE_MAX_SIZE 2048
+#define UCODE_CONTAINER_SECTION_HDR 8
+#define UCODE_CONTAINER_HEADER_SIZE 12
/* serialize access to the physical write */
static DEFINE_SPINLOCK(microcode_update_lock);
@@ -93,31 +88,24 @@ static struct equiv_cpu_entry *equiv_cpu_table;
static int collect_cpu_info_amd(int cpu, struct cpu_signature *csig)
{
struct cpuinfo_x86 *c = &cpu_data(cpu);
+ u32 dummy;
memset(csig, 0, sizeof(*csig));
-
if (c->x86_vendor != X86_VENDOR_AMD || c->x86 < 0x10) {
- printk(KERN_ERR "microcode: CPU%d not a capable AMD processor\n",
- cpu);
+ printk(KERN_WARNING "microcode: CPU%d: AMD CPU family 0x%x not "
+ "supported\n", cpu, c->x86);
return -1;
}
-
- asm volatile("movl %1, %%ecx; rdmsr"
- : "=a" (csig->rev)
- : "i" (0x0000008B) : "ecx");
-
- printk(KERN_INFO "microcode: collect_cpu_info_amd : patch_id=0x%x\n",
- csig->rev);
-
+ rdmsr(MSR_AMD64_PATCH_LEVEL, csig->rev, dummy);
+ printk(KERN_INFO "microcode: CPU%d: patch_level=0x%x\n", cpu, csig->rev);
return 0;
}
static int get_matching_microcode(int cpu, void *mc, int rev)
{
struct microcode_header_amd *mc_header = mc;
- struct pci_dev *nb_pci_dev, *sb_pci_dev;
unsigned int current_cpu_id;
- unsigned int equiv_cpu_id = 0x00;
+ u16 equiv_cpu_id = 0;
unsigned int i = 0;
BUG_ON(equiv_cpu_table == NULL);
@@ -132,57 +120,25 @@ static int get_matching_microcode(int cpu, void *mc, int rev)
}
if (!equiv_cpu_id) {
- printk(KERN_ERR "microcode: CPU%d cpu_id "
- "not found in equivalent cpu table \n", cpu);
+ printk(KERN_WARNING "microcode: CPU%d: cpu revision "
+ "not listed in equivalent cpu table\n", cpu);
return 0;
}
- if ((mc_header->processor_rev_id[0]) != (equiv_cpu_id & 0xff)) {
- printk(KERN_ERR
- "microcode: CPU%d patch does not match "
- "(patch is %x, cpu extended is %x) \n",
- cpu, mc_header->processor_rev_id[0],
- (equiv_cpu_id & 0xff));
+ if (mc_header->processor_rev_id != equiv_cpu_id) {
+ printk(KERN_ERR "microcode: CPU%d: patch mismatch "
+ "(processor_rev_id: %x, equiv_cpu_id: %x)\n",
+ cpu, mc_header->processor_rev_id, equiv_cpu_id);
return 0;
}
- if ((mc_header->processor_rev_id[1]) != ((equiv_cpu_id >> 16) & 0xff)) {
- printk(KERN_ERR "microcode: CPU%d patch does not match "
- "(patch is %x, cpu base id is %x) \n",
- cpu, mc_header->processor_rev_id[1],
- ((equiv_cpu_id >> 16) & 0xff));
-
+ /* ucode might be chipset specific -- currently we don't support this */
+ if (mc_header->nb_dev_id || mc_header->sb_dev_id) {
+ printk(KERN_ERR "microcode: CPU%d: loading of chipset "
+ "specific code not yet supported\n", cpu);
return 0;
}
- /* ucode may be northbridge specific */
- if (mc_header->nb_dev_id) {
- nb_pci_dev = pci_get_device(PCI_VENDOR_ID_AMD,
- (mc_header->nb_dev_id & 0xff),
- NULL);
- if ((!nb_pci_dev) ||
- (mc_header->nb_rev_id != nb_pci_dev->revision)) {
- printk(KERN_ERR "microcode: CPU%d NB mismatch \n", cpu);
- pci_dev_put(nb_pci_dev);
- return 0;
- }
- pci_dev_put(nb_pci_dev);
- }
-
- /* ucode may be southbridge specific */
- if (mc_header->sb_dev_id) {
- sb_pci_dev = pci_get_device(PCI_VENDOR_ID_AMD,
- (mc_header->sb_dev_id & 0xff),
- NULL);
- if ((!sb_pci_dev) ||
- (mc_header->sb_rev_id != sb_pci_dev->revision)) {
- printk(KERN_ERR "microcode: CPU%d SB mismatch \n", cpu);
- pci_dev_put(sb_pci_dev);
- return 0;
- }
- pci_dev_put(sb_pci_dev);
- }
-
if (mc_header->patch_id <= rev)
return 0;
@@ -192,12 +148,10 @@ static int get_matching_microcode(int cpu, void *mc, int rev)
static void apply_microcode_amd(int cpu)
{
unsigned long flags;
- unsigned int eax, edx;
- unsigned int rev;
+ u32 rev, dummy;
int cpu_num = raw_smp_processor_id();
struct ucode_cpu_info *uci = ucode_cpu_info + cpu_num;
struct microcode_amd *mc_amd = uci->mc;
- unsigned long addr;
/* We should bind the task to the CPU */
BUG_ON(cpu_num != cpu);
@@ -206,42 +160,34 @@ static void apply_microcode_amd(int cpu)
return;
spin_lock_irqsave(&microcode_update_lock, flags);
-
- addr = (unsigned long)&mc_amd->hdr.data_code;
- edx = (unsigned int)(((unsigned long)upper_32_bits(addr)));
- eax = (unsigned int)(((unsigned long)lower_32_bits(addr)));
-
- asm volatile("movl %0, %%ecx; wrmsr" :
- : "i" (0xc0010020), "a" (eax), "d" (edx) : "ecx");
-
+ wrmsrl(MSR_AMD64_PATCH_LOADER, (u64)(long)&mc_amd->hdr.data_code);
/* get patch id after patching */
- asm volatile("movl %1, %%ecx; rdmsr"
- : "=a" (rev)
- : "i" (0x0000008B) : "ecx");
-
+ rdmsr(MSR_AMD64_PATCH_LEVEL, rev, dummy);
spin_unlock_irqrestore(&microcode_update_lock, flags);
/* check current patch id and patch's id for match */
if (rev != mc_amd->hdr.patch_id) {
- printk(KERN_ERR "microcode: CPU%d update from revision "
- "0x%x to 0x%x failed\n", cpu_num,
- mc_amd->hdr.patch_id, rev);
+ printk(KERN_ERR "microcode: CPU%d: update failed "
+ "(for patch_level=0x%x)\n", cpu, mc_amd->hdr.patch_id);
return;
}
- printk(KERN_INFO "microcode: CPU%d updated from revision "
- "0x%x to 0x%x \n",
- cpu_num, uci->cpu_sig.rev, mc_amd->hdr.patch_id);
+ printk(KERN_INFO "microcode: CPU%d: updated (new patch_level=0x%x)\n",
+ cpu, rev);
uci->cpu_sig.rev = rev;
}
-static void * get_next_ucode(u8 *buf, unsigned int size,
- int (*get_ucode_data)(void *, const void *, size_t),
- unsigned int *mc_size)
+static int get_ucode_data(void *to, const u8 *from, size_t n)
+{
+ memcpy(to, from, n);
+ return 0;
+}
+
+static void *get_next_ucode(const u8 *buf, unsigned int size,
+ unsigned int *mc_size)
{
unsigned int total_size;
-#define UCODE_CONTAINER_SECTION_HDR 8
u8 section_hdr[UCODE_CONTAINER_SECTION_HDR];
void *mc;
@@ -249,39 +195,37 @@ static void * get_next_ucode(u8 *buf, unsigned int size,
return NULL;
if (section_hdr[0] != UCODE_UCODE_TYPE) {
- printk(KERN_ERR "microcode: error! "
- "Wrong microcode payload type field\n");
+ printk(KERN_ERR "microcode: error: invalid type field in "
+ "container file section header\n");
return NULL;
}
total_size = (unsigned long) (section_hdr[4] + (section_hdr[5] << 8));
- printk(KERN_INFO "microcode: size %u, total_size %u\n",
- size, total_size);
+ printk(KERN_DEBUG "microcode: size %u, total_size %u\n",
+ size, total_size);
if (total_size > size || total_size > UCODE_MAX_SIZE) {
- printk(KERN_ERR "microcode: error! Bad data in microcode data file\n");
+ printk(KERN_ERR "microcode: error: size mismatch\n");
return NULL;
}
mc = vmalloc(UCODE_MAX_SIZE);
if (mc) {
memset(mc, 0, UCODE_MAX_SIZE);
- if (get_ucode_data(mc, buf + UCODE_CONTAINER_SECTION_HDR, total_size)) {
+ if (get_ucode_data(mc, buf + UCODE_CONTAINER_SECTION_HDR,
+ total_size)) {
vfree(mc);
mc = NULL;
} else
*mc_size = total_size + UCODE_CONTAINER_SECTION_HDR;
}
-#undef UCODE_CONTAINER_SECTION_HDR
return mc;
}
-static int install_equiv_cpu_table(u8 *buf,
- int (*get_ucode_data)(void *, const void *, size_t))
+static int install_equiv_cpu_table(const u8 *buf)
{
-#define UCODE_CONTAINER_HEADER_SIZE 12
u8 *container_hdr[UCODE_CONTAINER_HEADER_SIZE];
unsigned int *buf_pos = (unsigned int *)container_hdr;
unsigned long size;
@@ -292,14 +236,15 @@ static int install_equiv_cpu_table(u8 *buf,
size = buf_pos[2];
if (buf_pos[1] != UCODE_EQUIV_CPU_TABLE_TYPE || !size) {
- printk(KERN_ERR "microcode: error! "
- "Wrong microcode equivalnet cpu table\n");
+ printk(KERN_ERR "microcode: error: invalid type field in "
+ "container file section header\n");
return 0;
}
equiv_cpu_table = (struct equiv_cpu_entry *) vmalloc(size);
if (!equiv_cpu_table) {
- printk(KERN_ERR "microcode: error, can't allocate memory for equiv CPU table\n");
+ printk(KERN_ERR "microcode: failed to allocate "
+ "equivalent CPU table\n");
return 0;
}
@@ -310,7 +255,6 @@ static int install_equiv_cpu_table(u8 *buf,
}
return size + UCODE_CONTAINER_HEADER_SIZE; /* add header length */
-#undef UCODE_CONTAINER_HEADER_SIZE
}
static void free_equiv_cpu_table(void)
@@ -321,18 +265,20 @@ static void free_equiv_cpu_table(void)
}
}
-static int generic_load_microcode(int cpu, void *data, size_t size,
- int (*get_ucode_data)(void *, const void *, size_t))
+static int generic_load_microcode(int cpu, const u8 *data, size_t size)
{
struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
- u8 *ucode_ptr = data, *new_mc = NULL, *mc;
+ const u8 *ucode_ptr = data;
+ void *new_mc = NULL;
+ void *mc;
int new_rev = uci->cpu_sig.rev;
unsigned int leftover;
unsigned long offset;
- offset = install_equiv_cpu_table(ucode_ptr, get_ucode_data);
+ offset = install_equiv_cpu_table(ucode_ptr);
if (!offset) {
- printk(KERN_ERR "microcode: installing equivalent cpu table failed\n");
+ printk(KERN_ERR "microcode: failed to create "
+ "equivalent cpu table\n");
return -EINVAL;
}
@@ -343,7 +289,7 @@ static int generic_load_microcode(int cpu, void *data, size_t size,
unsigned int uninitialized_var(mc_size);
struct microcode_header_amd *mc_header;
- mc = get_next_ucode(ucode_ptr, leftover, get_ucode_data, &mc_size);
+ mc = get_next_ucode(ucode_ptr, leftover, &mc_size);
if (!mc)
break;
@@ -353,7 +299,7 @@ static int generic_load_microcode(int cpu, void *data, size_t size,
vfree(new_mc);
new_rev = mc_header->patch_id;
new_mc = mc;
- } else
+ } else
vfree(mc);
ucode_ptr += mc_size;
@@ -365,9 +311,9 @@ static int generic_load_microcode(int cpu, void *data, size_t size,
if (uci->mc)
vfree(uci->mc);
uci->mc = new_mc;
- pr_debug("microcode: CPU%d found a matching microcode update with"
- " version 0x%x (current=0x%x)\n",
- cpu, new_rev, uci->cpu_sig.rev);
+ pr_debug("microcode: CPU%d found a matching microcode "
+ "update with version 0x%x (current=0x%x)\n",
+ cpu, new_rev, uci->cpu_sig.rev);
} else
vfree(new_mc);
}
@@ -377,12 +323,6 @@ static int generic_load_microcode(int cpu, void *data, size_t size,
return (int)leftover;
}
-static int get_ucode_fw(void *to, const void *from, size_t n)
-{
- memcpy(to, from, n);
- return 0;
-}
-
static int request_microcode_fw(int cpu, struct device *device)
{
const char *fw_name = "amd-ucode/microcode_amd.bin";
@@ -394,12 +334,11 @@ static int request_microcode_fw(int cpu, struct device *device)
ret = request_firmware(&firmware, fw_name, device);
if (ret) {
- printk(KERN_ERR "microcode: ucode data file %s load failed\n", fw_name);
+ printk(KERN_ERR "microcode: failed to load file %s\n", fw_name);
return ret;
}
- ret = generic_load_microcode(cpu, (void*)firmware->data, firmware->size,
- &get_ucode_fw);
+ ret = generic_load_microcode(cpu, firmware->data, firmware->size);
release_firmware(firmware);
@@ -408,8 +347,8 @@ static int request_microcode_fw(int cpu, struct device *device)
static int request_microcode_user(int cpu, const void __user *buf, size_t size)
{
- printk(KERN_WARNING "microcode: AMD microcode update via /dev/cpu/microcode"
- "is not supported\n");
+ printk(KERN_INFO "microcode: AMD microcode update via "
+ "/dev/cpu/microcode not supported\n");
return -1;
}
@@ -433,3 +372,4 @@ struct microcode_ops * __init init_amd_microcode(void)
{
return &microcode_amd_ops;
}
+
diff --git a/arch/x86/kernel/microcode_core.c b/arch/x86/kernel/microcode_core.c
index 82fb2809ce3..c9b721ba968 100644
--- a/arch/x86/kernel/microcode_core.c
+++ b/arch/x86/kernel/microcode_core.c
@@ -99,7 +99,7 @@ MODULE_LICENSE("GPL");
#define MICROCODE_VERSION "2.00"
-struct microcode_ops *microcode_ops;
+static struct microcode_ops *microcode_ops;
/* no concurrent ->write()s are allowed on /dev/cpu/microcode */
static DEFINE_MUTEX(microcode_mutex);
@@ -203,7 +203,7 @@ MODULE_ALIAS_MISCDEV(MICROCODE_MINOR);
#endif
/* fake device for request_firmware */
-struct platform_device *microcode_pdev;
+static struct platform_device *microcode_pdev;
static ssize_t reload_store(struct sys_device *dev,
struct sysdev_attribute *attr,
@@ -272,13 +272,18 @@ static struct attribute_group mc_attr_group = {
.name = "microcode",
};
-static void microcode_fini_cpu(int cpu)
+static void __microcode_fini_cpu(int cpu)
{
struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
- mutex_lock(&microcode_mutex);
microcode_ops->microcode_fini_cpu(cpu);
uci->valid = 0;
+}
+
+static void microcode_fini_cpu(int cpu)
+{
+ mutex_lock(&microcode_mutex);
+ __microcode_fini_cpu(cpu);
mutex_unlock(&microcode_mutex);
}
@@ -306,12 +311,16 @@ static int microcode_resume_cpu(int cpu)
* to this cpu (a bit of paranoia):
*/
if (microcode_ops->collect_cpu_info(cpu, &nsig)) {
- microcode_fini_cpu(cpu);
+ __microcode_fini_cpu(cpu);
+ printk(KERN_ERR "failed to collect_cpu_info for resuming cpu #%d\n",
+ cpu);
return -1;
}
- if (memcmp(&nsig, &uci->cpu_sig, sizeof(nsig))) {
- microcode_fini_cpu(cpu);
+ if ((nsig.sig != uci->cpu_sig.sig) || (nsig.pf != uci->cpu_sig.pf)) {
+ __microcode_fini_cpu(cpu);
+ printk(KERN_ERR "cached ucode doesn't match the resuming cpu #%d\n",
+ cpu);
/* Should we look for a new ucode here? */
return 1;
}
@@ -319,7 +328,7 @@ static int microcode_resume_cpu(int cpu)
return 0;
}
-void microcode_update_cpu(int cpu)
+static void microcode_update_cpu(int cpu)
{
struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
int err = 0;
diff --git a/arch/x86/kernel/microcode_intel.c b/arch/x86/kernel/microcode_intel.c
index 622dc4a2178..b7f4c929e61 100644
--- a/arch/x86/kernel/microcode_intel.c
+++ b/arch/x86/kernel/microcode_intel.c
@@ -155,6 +155,7 @@ static DEFINE_SPINLOCK(microcode_update_lock);
static int collect_cpu_info(int cpu_num, struct cpu_signature *csig)
{
struct cpuinfo_x86 *c = &cpu_data(cpu_num);
+ unsigned long flags;
unsigned int val[2];
memset(csig, 0, sizeof(*csig));
@@ -174,11 +175,16 @@ static int collect_cpu_info(int cpu_num, struct cpu_signature *csig)
csig->pf = 1 << ((val[1] >> 18) & 7);
}
+ /* serialize access to the physical write to MSR 0x79 */
+ spin_lock_irqsave(&microcode_update_lock, flags);
+
wrmsr(MSR_IA32_UCODE_REV, 0, 0);
/* see notes above for revision 1.07. Apparent chip bug */
sync_core();
/* get the current revision from MSR 0x8B */
rdmsr(MSR_IA32_UCODE_REV, val[0], csig->rev);
+ spin_unlock_irqrestore(&microcode_update_lock, flags);
+
pr_debug("microcode: collect_cpu_info : sig=0x%x, pf=0x%x, rev=0x%x\n",
csig->sig, csig->pf, csig->rev);
@@ -465,7 +471,7 @@ static void microcode_fini_cpu(int cpu)
uci->mc = NULL;
}
-struct microcode_ops microcode_intel_ops = {
+static struct microcode_ops microcode_intel_ops = {
.request_microcode_user = request_microcode_user,
.request_microcode_fw = request_microcode_fw,
.collect_cpu_info = collect_cpu_info,
diff --git a/arch/x86/kernel/nmi.c b/arch/x86/kernel/nmi.c
index 13316cf57cd..8bd1bf9622a 100644
--- a/arch/x86/kernel/nmi.c
+++ b/arch/x86/kernel/nmi.c
@@ -208,12 +208,17 @@ static int __init setup_nmi_watchdog(char *str)
++str;
}
- get_option(&str, &nmi);
-
- if (nmi >= NMI_INVALID)
- return 0;
+ if (!strncmp(str, "lapic", 5))
+ nmi_watchdog = NMI_LOCAL_APIC;
+ else if (!strncmp(str, "ioapic", 6))
+ nmi_watchdog = NMI_IO_APIC;
+ else {
+ get_option(&str, &nmi);
+ if (nmi >= NMI_INVALID)
+ return 0;
+ nmi_watchdog = nmi;
+ }
- nmi_watchdog = nmi;
return 1;
}
__setup("nmi_watchdog=", setup_nmi_watchdog);
diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c
index 19262482021..19a1044a0cd 100644
--- a/arch/x86/kernel/pci-dma.c
+++ b/arch/x86/kernel/pci-dma.c
@@ -6,6 +6,7 @@
#include <asm/proto.h>
#include <asm/dma.h>
#include <asm/iommu.h>
+#include <asm/gart.h>
#include <asm/calgary.h>
#include <asm/amd_iommu.h>
@@ -30,11 +31,6 @@ int no_iommu __read_mostly;
/* Set this to 1 if there is a HW IOMMU in the system */
int iommu_detected __read_mostly = 0;
-/* This tells the BIO block layer to assume merging. Default to off
- because we cannot guarantee merging later. */
-int iommu_bio_merge __read_mostly = 0;
-EXPORT_SYMBOL(iommu_bio_merge);
-
dma_addr_t bad_dma_address __read_mostly = 0;
EXPORT_SYMBOL(bad_dma_address);
@@ -105,11 +101,15 @@ static void __init dma32_free_bootmem(void)
dma32_bootmem_ptr = NULL;
dma32_bootmem_size = 0;
}
+#endif
void __init pci_iommu_alloc(void)
{
+#ifdef CONFIG_X86_64
/* free the range so iommu could get some range less than 4G */
dma32_free_bootmem();
+#endif
+
/*
* The order of these functions is important for
* fall-back/fail-over reasons
@@ -125,15 +125,6 @@ void __init pci_iommu_alloc(void)
pci_swiotlb_init();
}
-unsigned long iommu_nr_pages(unsigned long addr, unsigned long len)
-{
- unsigned long size = roundup((addr & ~PAGE_MASK) + len, PAGE_SIZE);
-
- return size >> PAGE_SHIFT;
-}
-EXPORT_SYMBOL(iommu_nr_pages);
-#endif
-
void *dma_generic_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_addr, gfp_t flag)
{
@@ -188,7 +179,6 @@ static __init int iommu_setup(char *p)
}
if (!strncmp(p, "biomerge", 8)) {
- iommu_bio_merge = 4096;
iommu_merge = 1;
force_iommu = 1;
}
@@ -300,8 +290,8 @@ fs_initcall(pci_iommu_init);
static __devinit void via_no_dac(struct pci_dev *dev)
{
if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI && forbid_dac == 0) {
- printk(KERN_INFO "PCI: VIA PCI bridge detected."
- "Disabling DAC.\n");
+ printk(KERN_INFO
+ "PCI: VIA PCI bridge detected. Disabling DAC.\n");
forbid_dac = 1;
}
}
diff --git a/arch/x86/kernel/pci-gart_64.c b/arch/x86/kernel/pci-gart_64.c
index ba7ad83e20a..a35eaa379ff 100644
--- a/arch/x86/kernel/pci-gart_64.c
+++ b/arch/x86/kernel/pci-gart_64.c
@@ -745,10 +745,8 @@ void __init gart_iommu_init(void)
unsigned long scratch;
long i;
- if (cache_k8_northbridges() < 0 || num_k8_northbridges == 0) {
- printk(KERN_INFO "PCI-GART: No AMD GART found.\n");
+ if (cache_k8_northbridges() < 0 || num_k8_northbridges == 0)
return;
- }
#ifndef CONFIG_AGP_AMD64
no_agp = 1;
diff --git a/arch/x86/kernel/pci-swiotlb_64.c b/arch/x86/kernel/pci-swiotlb_64.c
index 3c539d111ab..242c3440687 100644
--- a/arch/x86/kernel/pci-swiotlb_64.c
+++ b/arch/x86/kernel/pci-swiotlb_64.c
@@ -3,6 +3,8 @@
#include <linux/pci.h>
#include <linux/cache.h>
#include <linux/module.h>
+#include <linux/swiotlb.h>
+#include <linux/bootmem.h>
#include <linux/dma-mapping.h>
#include <asm/iommu.h>
@@ -11,6 +13,31 @@
int swiotlb __read_mostly;
+void *swiotlb_alloc_boot(size_t size, unsigned long nslabs)
+{
+ return alloc_bootmem_low_pages(size);
+}
+
+void *swiotlb_alloc(unsigned order, unsigned long nslabs)
+{
+ return (void *)__get_free_pages(GFP_DMA | __GFP_NOWARN, order);
+}
+
+dma_addr_t swiotlb_phys_to_bus(phys_addr_t paddr)
+{
+ return paddr;
+}
+
+phys_addr_t swiotlb_bus_to_phys(dma_addr_t baddr)
+{
+ return baddr;
+}
+
+int __weak swiotlb_arch_range_needs_mapping(void *ptr, size_t size)
+{
+ return 0;
+}
+
static dma_addr_t
swiotlb_map_single_phys(struct device *hwdev, phys_addr_t paddr, size_t size,
int direction)
@@ -50,8 +77,10 @@ struct dma_mapping_ops swiotlb_dma_ops = {
void __init pci_swiotlb_init(void)
{
/* don't initialize swiotlb if iommu=off (no_iommu=1) */
+#ifdef CONFIG_X86_64
if (!iommu_detected && !no_iommu && max_pfn > MAX_DMA32_PFN)
swiotlb = 1;
+#endif
if (swiotlb_force)
swiotlb = 1;
if (swiotlb) {
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 95d811a9594..e68bb9e3086 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -1,6 +1,7 @@
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/mm.h>
+#include <asm/idle.h>
#include <linux/smp.h>
#include <linux/slab.h>
#include <linux/sched.h>
@@ -302,7 +303,7 @@ static void c1e_idle(void)
rdmsr(MSR_K8_INT_PENDING_MSG, lo, hi);
if (lo & K8_INTP_C1E_ACTIVE_MASK) {
c1e_detected = 1;
- if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC))
+ if (!boot_cpu_has(X86_FEATURE_NONSTOP_TSC))
mark_tsc_unstable("TSC halt in AMD C1E");
printk(KERN_INFO "System has AMD C1E enabled\n");
set_cpu_cap(&boot_cpu_data, X86_FEATURE_AMDC1E);
diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c
index 24c2276aa45..3ba155d2488 100644
--- a/arch/x86/kernel/process_32.c
+++ b/arch/x86/kernel/process_32.c
@@ -60,6 +60,7 @@
#include <asm/idle.h>
#include <asm/syscalls.h>
#include <asm/smp.h>
+#include <asm/ds.h>
asmlinkage void ret_from_fork(void) __asm__("ret_from_fork");
@@ -251,14 +252,8 @@ void exit_thread(void)
tss->x86_tss.io_bitmap_base = INVALID_IO_BITMAP_OFFSET;
put_cpu();
}
-#ifdef CONFIG_X86_DS
- /* Free any DS contexts that have not been properly released. */
- if (unlikely(current->thread.ds_ctx)) {
- /* we clear debugctl to make sure DS is not used. */
- update_debugctlmsr(0);
- ds_free(current->thread.ds_ctx);
- }
-#endif /* CONFIG_X86_DS */
+
+ ds_exit_thread(current);
}
void flush_thread(void)
@@ -340,6 +335,12 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long sp,
kfree(p->thread.io_bitmap_ptr);
p->thread.io_bitmap_max = 0;
}
+
+ ds_copy_thread(p, current);
+
+ clear_tsk_thread_flag(p, TIF_DEBUGCTLMSR);
+ p->thread.debugctlmsr = 0;
+
return err;
}
@@ -420,48 +421,19 @@ int set_tsc_mode(unsigned int val)
return 0;
}
-#ifdef CONFIG_X86_DS
-static int update_debugctl(struct thread_struct *prev,
- struct thread_struct *next, unsigned long debugctl)
-{
- unsigned long ds_prev = 0;
- unsigned long ds_next = 0;
-
- if (prev->ds_ctx)
- ds_prev = (unsigned long)prev->ds_ctx->ds;
- if (next->ds_ctx)
- ds_next = (unsigned long)next->ds_ctx->ds;
-
- if (ds_next != ds_prev) {
- /* we clear debugctl to make sure DS
- * is not in use when we change it */
- debugctl = 0;
- update_debugctlmsr(0);
- wrmsr(MSR_IA32_DS_AREA, ds_next, 0);
- }
- return debugctl;
-}
-#else
-static int update_debugctl(struct thread_struct *prev,
- struct thread_struct *next, unsigned long debugctl)
-{
- return debugctl;
-}
-#endif /* CONFIG_X86_DS */
-
static noinline void
__switch_to_xtra(struct task_struct *prev_p, struct task_struct *next_p,
struct tss_struct *tss)
{
struct thread_struct *prev, *next;
- unsigned long debugctl;
prev = &prev_p->thread;
next = &next_p->thread;
- debugctl = update_debugctl(prev, next, prev->debugctlmsr);
-
- if (next->debugctlmsr != debugctl)
+ if (test_tsk_thread_flag(next_p, TIF_DS_AREA_MSR) ||
+ test_tsk_thread_flag(prev_p, TIF_DS_AREA_MSR))
+ ds_switch_to(prev_p, next_p);
+ else if (next->debugctlmsr != prev->debugctlmsr)
update_debugctlmsr(next->debugctlmsr);
if (test_tsk_thread_flag(next_p, TIF_DEBUG)) {
@@ -483,15 +455,6 @@ __switch_to_xtra(struct task_struct *prev_p, struct task_struct *next_p,
hard_enable_TSC();
}
-#ifdef CONFIG_X86_PTRACE_BTS
- if (test_tsk_thread_flag(prev_p, TIF_BTS_TRACE_TS))
- ptrace_bts_take_timestamp(prev_p, BTS_TASK_DEPARTS);
-
- if (test_tsk_thread_flag(next_p, TIF_BTS_TRACE_TS))
- ptrace_bts_take_timestamp(next_p, BTS_TASK_ARRIVES);
-#endif /* CONFIG_X86_PTRACE_BTS */
-
-
if (!test_tsk_thread_flag(next_p, TIF_IO_BITMAP)) {
/*
* Disable the bitmap via an invalid offset. We still cache
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index fbb321d53d3..416fb9282f4 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -53,6 +53,7 @@
#include <asm/ia32.h>
#include <asm/idle.h>
#include <asm/syscalls.h>
+#include <asm/ds.h>
asmlinkage extern void ret_from_fork(void);
@@ -236,14 +237,8 @@ void exit_thread(void)
t->io_bitmap_max = 0;
put_cpu();
}
-#ifdef CONFIG_X86_DS
- /* Free any DS contexts that have not been properly released. */
- if (unlikely(t->ds_ctx)) {
- /* we clear debugctl to make sure DS is not used. */
- update_debugctlmsr(0);
- ds_free(t->ds_ctx);
- }
-#endif /* CONFIG_X86_DS */
+
+ ds_exit_thread(current);
}
void flush_thread(void)
@@ -373,6 +368,12 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long sp,
if (err)
goto out;
}
+
+ ds_copy_thread(p, me);
+
+ clear_tsk_thread_flag(p, TIF_DEBUGCTLMSR);
+ p->thread.debugctlmsr = 0;
+
err = 0;
out:
if (err && p->thread.io_bitmap_ptr) {
@@ -471,35 +472,14 @@ static inline void __switch_to_xtra(struct task_struct *prev_p,
struct tss_struct *tss)
{
struct thread_struct *prev, *next;
- unsigned long debugctl;
prev = &prev_p->thread,
next = &next_p->thread;
- debugctl = prev->debugctlmsr;
-
-#ifdef CONFIG_X86_DS
- {
- unsigned long ds_prev = 0, ds_next = 0;
-
- if (prev->ds_ctx)
- ds_prev = (unsigned long)prev->ds_ctx->ds;
- if (next->ds_ctx)
- ds_next = (unsigned long)next->ds_ctx->ds;
-
- if (ds_next != ds_prev) {
- /*
- * We clear debugctl to make sure DS
- * is not in use when we change it:
- */
- debugctl = 0;
- update_debugctlmsr(0);
- wrmsrl(MSR_IA32_DS_AREA, ds_next);
- }
- }
-#endif /* CONFIG_X86_DS */
-
- if (next->debugctlmsr != debugctl)
+ if (test_tsk_thread_flag(next_p, TIF_DS_AREA_MSR) ||
+ test_tsk_thread_flag(prev_p, TIF_DS_AREA_MSR))
+ ds_switch_to(prev_p, next_p);
+ else if (next->debugctlmsr != prev->debugctlmsr)
update_debugctlmsr(next->debugctlmsr);
if (test_tsk_thread_flag(next_p, TIF_DEBUG)) {
@@ -534,14 +514,6 @@ static inline void __switch_to_xtra(struct task_struct *prev_p,
*/
memset(tss->io_bitmap, 0xff, prev->io_bitmap_max);
}
-
-#ifdef CONFIG_X86_PTRACE_BTS
- if (test_tsk_thread_flag(prev_p, TIF_BTS_TRACE_TS))
- ptrace_bts_take_timestamp(prev_p, BTS_TASK_DEPARTS);
-
- if (test_tsk_thread_flag(next_p, TIF_BTS_TRACE_TS))
- ptrace_bts_take_timestamp(next_p, BTS_TASK_ARRIVES);
-#endif /* CONFIG_X86_PTRACE_BTS */
}
/*
diff --git a/arch/x86/kernel/ptrace.c b/arch/x86/kernel/ptrace.c
index 2c8ec1ba75e..0a5df5f82fb 100644
--- a/arch/x86/kernel/ptrace.c
+++ b/arch/x86/kernel/ptrace.c
@@ -581,153 +581,91 @@ static int ioperm_get(struct task_struct *target,
}
#ifdef CONFIG_X86_PTRACE_BTS
-/*
- * The configuration for a particular BTS hardware implementation.
- */
-struct bts_configuration {
- /* the size of a BTS record in bytes; at most BTS_MAX_RECORD_SIZE */
- unsigned char sizeof_bts;
- /* the size of a field in the BTS record in bytes */
- unsigned char sizeof_field;
- /* a bitmask to enable/disable BTS in DEBUGCTL MSR */
- unsigned long debugctl_mask;
-};
-static struct bts_configuration bts_cfg;
-
-#define BTS_MAX_RECORD_SIZE (8 * 3)
-
-
-/*
- * Branch Trace Store (BTS) uses the following format. Different
- * architectures vary in the size of those fields.
- * - source linear address
- * - destination linear address
- * - flags
- *
- * Later architectures use 64bit pointers throughout, whereas earlier
- * architectures use 32bit pointers in 32bit mode.
- *
- * We compute the base address for the first 8 fields based on:
- * - the field size stored in the DS configuration
- * - the relative field position
- *
- * In order to store additional information in the BTS buffer, we use
- * a special source address to indicate that the record requires
- * special interpretation.
- *
- * Netburst indicated via a bit in the flags field whether the branch
- * was predicted; this is ignored.
- */
-
-enum bts_field {
- bts_from = 0,
- bts_to,
- bts_flags,
-
- bts_escape = (unsigned long)-1,
- bts_qual = bts_to,
- bts_jiffies = bts_flags
-};
-
-static inline unsigned long bts_get(const char *base, enum bts_field field)
-{
- base += (bts_cfg.sizeof_field * field);
- return *(unsigned long *)base;
-}
-
-static inline void bts_set(char *base, enum bts_field field, unsigned long val)
-{
- base += (bts_cfg.sizeof_field * field);;
- (*(unsigned long *)base) = val;
-}
-
-/*
- * Translate a BTS record from the raw format into the bts_struct format
- *
- * out (out): bts_struct interpretation
- * raw: raw BTS record
- */
-static void ptrace_bts_translate_record(struct bts_struct *out, const void *raw)
-{
- memset(out, 0, sizeof(*out));
- if (bts_get(raw, bts_from) == bts_escape) {
- out->qualifier = bts_get(raw, bts_qual);
- out->variant.jiffies = bts_get(raw, bts_jiffies);
- } else {
- out->qualifier = BTS_BRANCH;
- out->variant.lbr.from_ip = bts_get(raw, bts_from);
- out->variant.lbr.to_ip = bts_get(raw, bts_to);
- }
-}
-
static int ptrace_bts_read_record(struct task_struct *child, size_t index,
struct bts_struct __user *out)
{
- struct bts_struct ret;
- const void *bts_record;
- size_t bts_index, bts_end;
+ const struct bts_trace *trace;
+ struct bts_struct bts;
+ const unsigned char *at;
int error;
- error = ds_get_bts_end(child->bts, &bts_end);
- if (error < 0)
- return error;
+ trace = ds_read_bts(child->bts);
+ if (!trace)
+ return -EPERM;
- if (bts_end <= index)
- return -EINVAL;
+ at = trace->ds.top - ((index + 1) * trace->ds.size);
+ if ((void *)at < trace->ds.begin)
+ at += (trace->ds.n * trace->ds.size);
- error = ds_get_bts_index(child->bts, &bts_index);
- if (error < 0)
- return error;
-
- /* translate the ptrace bts index into the ds bts index */
- bts_index += bts_end - (index + 1);
- if (bts_end <= bts_index)
- bts_index -= bts_end;
+ if (!trace->read)
+ return -EOPNOTSUPP;
- error = ds_access_bts(child->bts, bts_index, &bts_record);
+ error = trace->read(child->bts, at, &bts);
if (error < 0)
return error;
- ptrace_bts_translate_record(&ret, bts_record);
-
- if (copy_to_user(out, &ret, sizeof(ret)))
+ if (copy_to_user(out, &bts, sizeof(bts)))
return -EFAULT;
- return sizeof(ret);
+ return sizeof(bts);
}
static int ptrace_bts_drain(struct task_struct *child,
long size,
struct bts_struct __user *out)
{
- struct bts_struct ret;
- const unsigned char *raw;
- size_t end, i;
- int error;
+ const struct bts_trace *trace;
+ const unsigned char *at;
+ int error, drained = 0;
- error = ds_get_bts_index(child->bts, &end);
- if (error < 0)
- return error;
+ trace = ds_read_bts(child->bts);
+ if (!trace)
+ return -EPERM;
- if (size < (end * sizeof(struct bts_struct)))
+ if (!trace->read)
+ return -EOPNOTSUPP;
+
+ if (size < (trace->ds.top - trace->ds.begin))
return -EIO;
- error = ds_access_bts(child->bts, 0, (const void **)&raw);
- if (error < 0)
- return error;
+ for (at = trace->ds.begin; (void *)at < trace->ds.top;
+ out++, drained++, at += trace->ds.size) {
+ struct bts_struct bts;
+ int error;
- for (i = 0; i < end; i++, out++, raw += bts_cfg.sizeof_bts) {
- ptrace_bts_translate_record(&ret, raw);
+ error = trace->read(child->bts, at, &bts);
+ if (error < 0)
+ return error;
- if (copy_to_user(out, &ret, sizeof(ret)))
+ if (copy_to_user(out, &bts, sizeof(bts)))
return -EFAULT;
}
- error = ds_clear_bts(child->bts);
+ memset(trace->ds.begin, 0, trace->ds.n * trace->ds.size);
+
+ error = ds_reset_bts(child->bts);
if (error < 0)
return error;
- return end;
+ return drained;
+}
+
+static int ptrace_bts_allocate_buffer(struct task_struct *child, size_t size)
+{
+ child->bts_buffer = alloc_locked_buffer(size);
+ if (!child->bts_buffer)
+ return -ENOMEM;
+
+ child->bts_size = size;
+
+ return 0;
+}
+
+static void ptrace_bts_free_buffer(struct task_struct *child)
+{
+ free_locked_buffer(child->bts_buffer, child->bts_size);
+ child->bts_buffer = NULL;
+ child->bts_size = 0;
}
static int ptrace_bts_config(struct task_struct *child,
@@ -735,136 +673,86 @@ static int ptrace_bts_config(struct task_struct *child,
const struct ptrace_bts_config __user *ucfg)
{
struct ptrace_bts_config cfg;
- int error = 0;
-
- error = -EOPNOTSUPP;
- if (!bts_cfg.sizeof_bts)
- goto errout;
+ unsigned int flags = 0;
- error = -EIO;
if (cfg_size < sizeof(cfg))
- goto errout;
+ return -EIO;
- error = -EFAULT;
if (copy_from_user(&cfg, ucfg, sizeof(cfg)))
- goto errout;
-
- error = -EINVAL;
- if ((cfg.flags & PTRACE_BTS_O_SIGNAL) &&
- !(cfg.flags & PTRACE_BTS_O_ALLOC))
- goto errout;
-
- if (cfg.flags & PTRACE_BTS_O_ALLOC) {
- bts_ovfl_callback_t ovfl = NULL;
- unsigned int sig = 0;
-
- error = -EINVAL;
- if (cfg.size < (10 * bts_cfg.sizeof_bts))
- goto errout;
+ return -EFAULT;
- if (cfg.flags & PTRACE_BTS_O_SIGNAL) {
- if (!cfg.signal)
- goto errout;
+ if (child->bts) {
+ ds_release_bts(child->bts);
+ child->bts = NULL;
+ }
- error = -EOPNOTSUPP;
- goto errout;
+ if (cfg.flags & PTRACE_BTS_O_SIGNAL) {
+ if (!cfg.signal)
+ return -EINVAL;
- sig = cfg.signal;
- }
+ return -EOPNOTSUPP;
- if (child->bts) {
- (void)ds_release_bts(child->bts);
- kfree(child->bts_buffer);
+ child->thread.bts_ovfl_signal = cfg.signal;
+ }
- child->bts = NULL;
- child->bts_buffer = NULL;
- }
+ if ((cfg.flags & PTRACE_BTS_O_ALLOC) &&
+ (cfg.size != child->bts_size)) {
+ int error;
- error = -ENOMEM;
- child->bts_buffer = kzalloc(cfg.size, GFP_KERNEL);
- if (!child->bts_buffer)
- goto errout;
-
- child->bts = ds_request_bts(child, child->bts_buffer, cfg.size,
- ovfl, /* th = */ (size_t)-1);
- if (IS_ERR(child->bts)) {
- error = PTR_ERR(child->bts);
- kfree(child->bts_buffer);
- child->bts = NULL;
- child->bts_buffer = NULL;
- goto errout;
- }
+ ptrace_bts_free_buffer(child);
- child->thread.bts_ovfl_signal = sig;
+ error = ptrace_bts_allocate_buffer(child, cfg.size);
+ if (error < 0)
+ return error;
}
- error = -EINVAL;
- if (!child->thread.ds_ctx && cfg.flags)
- goto errout;
-
if (cfg.flags & PTRACE_BTS_O_TRACE)
- child->thread.debugctlmsr |= bts_cfg.debugctl_mask;
- else
- child->thread.debugctlmsr &= ~bts_cfg.debugctl_mask;
+ flags |= BTS_USER;
if (cfg.flags & PTRACE_BTS_O_SCHED)
- set_tsk_thread_flag(child, TIF_BTS_TRACE_TS);
- else
- clear_tsk_thread_flag(child, TIF_BTS_TRACE_TS);
+ flags |= BTS_TIMESTAMPS;
- error = sizeof(cfg);
+ child->bts = ds_request_bts(child, child->bts_buffer, child->bts_size,
+ /* ovfl = */ NULL, /* th = */ (size_t)-1,
+ flags);
+ if (IS_ERR(child->bts)) {
+ int error = PTR_ERR(child->bts);
-out:
- if (child->thread.debugctlmsr)
- set_tsk_thread_flag(child, TIF_DEBUGCTLMSR);
- else
- clear_tsk_thread_flag(child, TIF_DEBUGCTLMSR);
+ ptrace_bts_free_buffer(child);
+ child->bts = NULL;
- return error;
+ return error;
+ }
-errout:
- child->thread.debugctlmsr &= ~bts_cfg.debugctl_mask;
- clear_tsk_thread_flag(child, TIF_BTS_TRACE_TS);
- goto out;
+ return sizeof(cfg);
}
static int ptrace_bts_status(struct task_struct *child,
long cfg_size,
struct ptrace_bts_config __user *ucfg)
{
+ const struct bts_trace *trace;
struct ptrace_bts_config cfg;
- size_t end;
- const void *base, *max;
- int error;
if (cfg_size < sizeof(cfg))
return -EIO;
- error = ds_get_bts_end(child->bts, &end);
- if (error < 0)
- return error;
-
- error = ds_access_bts(child->bts, /* index = */ 0, &base);
- if (error < 0)
- return error;
-
- error = ds_access_bts(child->bts, /* index = */ end, &max);
- if (error < 0)
- return error;
+ trace = ds_read_bts(child->bts);
+ if (!trace)
+ return -EPERM;
memset(&cfg, 0, sizeof(cfg));
- cfg.size = (max - base);
+ cfg.size = trace->ds.end - trace->ds.begin;
cfg.signal = child->thread.bts_ovfl_signal;
cfg.bts_size = sizeof(struct bts_struct);
if (cfg.signal)
cfg.flags |= PTRACE_BTS_O_SIGNAL;
- if (test_tsk_thread_flag(child, TIF_DEBUGCTLMSR) &&
- child->thread.debugctlmsr & bts_cfg.debugctl_mask)
+ if (trace->ds.flags & BTS_USER)
cfg.flags |= PTRACE_BTS_O_TRACE;
- if (test_tsk_thread_flag(child, TIF_BTS_TRACE_TS))
+ if (trace->ds.flags & BTS_TIMESTAMPS)
cfg.flags |= PTRACE_BTS_O_SCHED;
if (copy_to_user(ucfg, &cfg, sizeof(cfg)))
@@ -873,106 +761,77 @@ static int ptrace_bts_status(struct task_struct *child,
return sizeof(cfg);
}
-static int ptrace_bts_write_record(struct task_struct *child,
- const struct bts_struct *in)
+static int ptrace_bts_clear(struct task_struct *child)
{
- unsigned char bts_record[BTS_MAX_RECORD_SIZE];
+ const struct bts_trace *trace;
- BUG_ON(BTS_MAX_RECORD_SIZE < bts_cfg.sizeof_bts);
+ trace = ds_read_bts(child->bts);
+ if (!trace)
+ return -EPERM;
- memset(bts_record, 0, bts_cfg.sizeof_bts);
- switch (in->qualifier) {
- case BTS_INVALID:
- break;
+ memset(trace->ds.begin, 0, trace->ds.n * trace->ds.size);
- case BTS_BRANCH:
- bts_set(bts_record, bts_from, in->variant.lbr.from_ip);
- bts_set(bts_record, bts_to, in->variant.lbr.to_ip);
- break;
+ return ds_reset_bts(child->bts);
+}
- case BTS_TASK_ARRIVES:
- case BTS_TASK_DEPARTS:
- bts_set(bts_record, bts_from, bts_escape);
- bts_set(bts_record, bts_qual, in->qualifier);
- bts_set(bts_record, bts_jiffies, in->variant.jiffies);
- break;
+static int ptrace_bts_size(struct task_struct *child)
+{
+ const struct bts_trace *trace;
- default:
- return -EINVAL;
- }
+ trace = ds_read_bts(child->bts);
+ if (!trace)
+ return -EPERM;
- return ds_write_bts(child->bts, bts_record, bts_cfg.sizeof_bts);
+ return (trace->ds.top - trace->ds.begin) / trace->ds.size;
}
-void ptrace_bts_take_timestamp(struct task_struct *tsk,
- enum bts_qualifier qualifier)
+static void ptrace_bts_fork(struct task_struct *tsk)
{
- struct bts_struct rec = {
- .qualifier = qualifier,
- .variant.jiffies = jiffies_64
- };
-
- ptrace_bts_write_record(tsk, &rec);
+ tsk->bts = NULL;
+ tsk->bts_buffer = NULL;
+ tsk->bts_size = 0;
+ tsk->thread.bts_ovfl_signal = 0;
}
-static const struct bts_configuration bts_cfg_netburst = {
- .sizeof_bts = sizeof(long) * 3,
- .sizeof_field = sizeof(long),
- .debugctl_mask = (1<<2)|(1<<3)|(1<<5)
-};
+static void ptrace_bts_untrace(struct task_struct *child)
+{
+ if (unlikely(child->bts)) {
+ ds_release_bts(child->bts);
+ child->bts = NULL;
-static const struct bts_configuration bts_cfg_pentium_m = {
- .sizeof_bts = sizeof(long) * 3,
- .sizeof_field = sizeof(long),
- .debugctl_mask = (1<<6)|(1<<7)
-};
+ /* We cannot update total_vm and locked_vm since
+ child's mm is already gone. But we can reclaim the
+ memory. */
+ kfree(child->bts_buffer);
+ child->bts_buffer = NULL;
+ child->bts_size = 0;
+ }
+}
-static const struct bts_configuration bts_cfg_core2 = {
- .sizeof_bts = 8 * 3,
- .sizeof_field = 8,
- .debugctl_mask = (1<<6)|(1<<7)|(1<<9)
-};
+static void ptrace_bts_detach(struct task_struct *child)
+{
+ if (unlikely(child->bts)) {
+ ds_release_bts(child->bts);
+ child->bts = NULL;
-static inline void bts_configure(const struct bts_configuration *cfg)
+ ptrace_bts_free_buffer(child);
+ }
+}
+#else
+static inline void ptrace_bts_fork(struct task_struct *tsk) {}
+static inline void ptrace_bts_detach(struct task_struct *child) {}
+static inline void ptrace_bts_untrace(struct task_struct *child) {}
+#endif /* CONFIG_X86_PTRACE_BTS */
+
+void x86_ptrace_fork(struct task_struct *child, unsigned long clone_flags)
{
- bts_cfg = *cfg;
+ ptrace_bts_fork(child);
}
-void __cpuinit ptrace_bts_init_intel(struct cpuinfo_x86 *c)
+void x86_ptrace_untrace(struct task_struct *child)
{
- switch (c->x86) {
- case 0x6:
- switch (c->x86_model) {
- case 0 ... 0xC:
- /* sorry, don't know about them */
- break;
- case 0xD:
- case 0xE: /* Pentium M */
- bts_configure(&bts_cfg_pentium_m);
- break;
- default: /* Core2, Atom, ... */
- bts_configure(&bts_cfg_core2);
- break;
- }
- break;
- case 0xF:
- switch (c->x86_model) {
- case 0x0:
- case 0x1:
- case 0x2: /* Netburst */
- bts_configure(&bts_cfg_netburst);
- break;
- default:
- /* sorry, don't know about them */
- break;
- }
- break;
- default:
- /* sorry, don't know about them */
- break;
- }
+ ptrace_bts_untrace(child);
}
-#endif /* CONFIG_X86_PTRACE_BTS */
/*
* Called by kernel/ptrace.c when detaching..
@@ -985,19 +844,7 @@ void ptrace_disable(struct task_struct *child)
#ifdef TIF_SYSCALL_EMU
clear_tsk_thread_flag(child, TIF_SYSCALL_EMU);
#endif
-#ifdef CONFIG_X86_PTRACE_BTS
- if (child->bts) {
- (void)ds_release_bts(child->bts);
- kfree(child->bts_buffer);
- child->bts_buffer = NULL;
-
- child->thread.debugctlmsr &= ~bts_cfg.debugctl_mask;
- if (!child->thread.debugctlmsr)
- clear_tsk_thread_flag(child, TIF_DEBUGCTLMSR);
-
- clear_tsk_thread_flag(child, TIF_BTS_TRACE_TS);
- }
-#endif /* CONFIG_X86_PTRACE_BTS */
+ ptrace_bts_detach(child);
}
#if defined CONFIG_X86_32 || defined CONFIG_IA32_EMULATION
@@ -1128,16 +975,9 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
(child, data, (struct ptrace_bts_config __user *)addr);
break;
- case PTRACE_BTS_SIZE: {
- size_t size;
-
- ret = ds_get_bts_index(child->bts, &size);
- if (ret == 0) {
- BUG_ON(size != (int) size);
- ret = (int) size;
- }
+ case PTRACE_BTS_SIZE:
+ ret = ptrace_bts_size(child);
break;
- }
case PTRACE_BTS_GET:
ret = ptrace_bts_read_record
@@ -1145,7 +985,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
break;
case PTRACE_BTS_CLEAR:
- ret = ds_clear_bts(child->bts);
+ ret = ptrace_bts_clear(child);
break;
case PTRACE_BTS_DRAIN:
@@ -1408,6 +1248,14 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
case PTRACE_GET_THREAD_AREA:
case PTRACE_SET_THREAD_AREA:
+#ifdef CONFIG_X86_PTRACE_BTS
+ case PTRACE_BTS_CONFIG:
+ case PTRACE_BTS_STATUS:
+ case PTRACE_BTS_SIZE:
+ case PTRACE_BTS_GET:
+ case PTRACE_BTS_CLEAR:
+ case PTRACE_BTS_DRAIN:
+#endif /* CONFIG_X86_PTRACE_BTS */
return arch_ptrace(child, request, addr, data);
default:
diff --git a/arch/x86/kernel/quirks.c b/arch/x86/kernel/quirks.c
index 67465ed8931..309949e9e1c 100644
--- a/arch/x86/kernel/quirks.c
+++ b/arch/x86/kernel/quirks.c
@@ -168,6 +168,8 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH7_31,
ich_force_enable_hpet);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_1,
ich_force_enable_hpet);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH8_4,
+ ich_force_enable_hpet);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH9_7,
ich_force_enable_hpet);
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index 32fe42f26e7..ae0d8042cf6 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -93,11 +93,13 @@
#include <asm/desc.h>
#include <asm/dma.h>
#include <asm/iommu.h>
+#include <asm/gart.h>
#include <asm/mmu_context.h>
#include <asm/proto.h>
#include <mach_apic.h>
#include <asm/paravirt.h>
+#include <asm/hypervisor.h>
#include <asm/percpu.h>
#include <asm/topology.h>
@@ -448,6 +450,7 @@ static void __init reserve_early_setup_data(void)
* @size: Size of the crashkernel memory to reserve.
* Returns the base address on success, and -1ULL on failure.
*/
+static
unsigned long long __init find_and_reserve_crashkernel(unsigned long long size)
{
const unsigned long long alignment = 16<<20; /* 16M */
@@ -600,157 +603,7 @@ static struct x86_quirks default_x86_quirks __initdata = {
struct x86_quirks *x86_quirks __initdata = &default_x86_quirks;
-/*
- * Some BIOSes seem to corrupt the low 64k of memory during events
- * like suspend/resume and unplugging an HDMI cable. Reserve all
- * remaining free memory in that area and fill it with a distinct
- * pattern.
- */
-#ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION
-#define MAX_SCAN_AREAS 8
-
-static int __read_mostly memory_corruption_check = -1;
-
-static unsigned __read_mostly corruption_check_size = 64*1024;
-static unsigned __read_mostly corruption_check_period = 60; /* seconds */
-
-static struct e820entry scan_areas[MAX_SCAN_AREAS];
-static int num_scan_areas;
-
-
-static int set_corruption_check(char *arg)
-{
- char *end;
-
- memory_corruption_check = simple_strtol(arg, &end, 10);
-
- return (*end == 0) ? 0 : -EINVAL;
-}
-early_param("memory_corruption_check", set_corruption_check);
-
-static int set_corruption_check_period(char *arg)
-{
- char *end;
-
- corruption_check_period = simple_strtoul(arg, &end, 10);
-
- return (*end == 0) ? 0 : -EINVAL;
-}
-early_param("memory_corruption_check_period", set_corruption_check_period);
-
-static int set_corruption_check_size(char *arg)
-{
- char *end;
- unsigned size;
-
- size = memparse(arg, &end);
-
- if (*end == '\0')
- corruption_check_size = size;
-
- return (size == corruption_check_size) ? 0 : -EINVAL;
-}
-early_param("memory_corruption_check_size", set_corruption_check_size);
-
-
-static void __init setup_bios_corruption_check(void)
-{
- u64 addr = PAGE_SIZE; /* assume first page is reserved anyway */
-
- if (memory_corruption_check == -1) {
- memory_corruption_check =
-#ifdef CONFIG_X86_BOOTPARAM_MEMORY_CORRUPTION_CHECK
- 1
-#else
- 0
-#endif
- ;
- }
-
- if (corruption_check_size == 0)
- memory_corruption_check = 0;
-
- if (!memory_corruption_check)
- return;
-
- corruption_check_size = round_up(corruption_check_size, PAGE_SIZE);
-
- while(addr < corruption_check_size && num_scan_areas < MAX_SCAN_AREAS) {
- u64 size;
- addr = find_e820_area_size(addr, &size, PAGE_SIZE);
-
- if (addr == 0)
- break;
-
- if ((addr + size) > corruption_check_size)
- size = corruption_check_size - addr;
-
- if (size == 0)
- break;
-
- e820_update_range(addr, size, E820_RAM, E820_RESERVED);
- scan_areas[num_scan_areas].addr = addr;
- scan_areas[num_scan_areas].size = size;
- num_scan_areas++;
-
- /* Assume we've already mapped this early memory */
- memset(__va(addr), 0, size);
-
- addr += size;
- }
-
- printk(KERN_INFO "Scanning %d areas for low memory corruption\n",
- num_scan_areas);
- update_e820();
-}
-
-static struct timer_list periodic_check_timer;
-
-void check_for_bios_corruption(void)
-{
- int i;
- int corruption = 0;
-
- if (!memory_corruption_check)
- return;
-
- for(i = 0; i < num_scan_areas; i++) {
- unsigned long *addr = __va(scan_areas[i].addr);
- unsigned long size = scan_areas[i].size;
-
- for(; size; addr++, size -= sizeof(unsigned long)) {
- if (!*addr)
- continue;
- printk(KERN_ERR "Corrupted low memory at %p (%lx phys) = %08lx\n",
- addr, __pa(addr), *addr);
- corruption = 1;
- *addr = 0;
- }
- }
-
- WARN(corruption, KERN_ERR "Memory corruption detected in low memory\n");
-}
-
-static void periodic_check_for_corruption(unsigned long data)
-{
- check_for_bios_corruption();
- mod_timer(&periodic_check_timer, round_jiffies(jiffies + corruption_check_period*HZ));
-}
-
-void start_periodic_check_for_corruption(void)
-{
- if (!memory_corruption_check || corruption_check_period == 0)
- return;
-
- printk(KERN_INFO "Scanning for low memory corruption every %d seconds\n",
- corruption_check_period);
-
- init_timer(&periodic_check_timer);
- periodic_check_timer.function = &periodic_check_for_corruption;
- periodic_check_for_corruption(0);
-}
-#endif
-
+#ifdef CONFIG_X86_RESERVE_LOW_64K
static int __init dmi_low_memory_corruption(const struct dmi_system_id *d)
{
printk(KERN_NOTICE
@@ -762,6 +615,7 @@ static int __init dmi_low_memory_corruption(const struct dmi_system_id *d)
return 0;
}
+#endif
/* List of systems that have known low memory corruption BIOS problems */
static struct dmi_system_id __initdata bad_bios_dmi_table[] = {
@@ -920,6 +774,12 @@ void __init setup_arch(char **cmdline_p)
dmi_check_system(bad_bios_dmi_table);
+ /*
+ * VMware detection requires dmi to be available, so this
+ * needs to be done after dmi_scan_machine, for the BP.
+ */
+ init_hypervisor(&boot_cpu_data);
+
#ifdef CONFIG_X86_32
probe_roms();
#endif
diff --git a/arch/x86/kernel/setup_percpu.c b/arch/x86/kernel/setup_percpu.c
index 0b63b08e753..49f3f709ee1 100644
--- a/arch/x86/kernel/setup_percpu.c
+++ b/arch/x86/kernel/setup_percpu.c
@@ -339,25 +339,25 @@ static const cpumask_t cpu_mask_none;
/*
* Returns a pointer to the bitmask of CPUs on Node 'node'.
*/
-const cpumask_t *_node_to_cpumask_ptr(int node)
+const cpumask_t *cpumask_of_node(int node)
{
if (node_to_cpumask_map == NULL) {
printk(KERN_WARNING
- "_node_to_cpumask_ptr(%d): no node_to_cpumask_map!\n",
+ "cpumask_of_node(%d): no node_to_cpumask_map!\n",
node);
dump_stack();
return (const cpumask_t *)&cpu_online_map;
}
if (node >= nr_node_ids) {
printk(KERN_WARNING
- "_node_to_cpumask_ptr(%d): node > nr_node_ids(%d)\n",
+ "cpumask_of_node(%d): node > nr_node_ids(%d)\n",
node, nr_node_ids);
dump_stack();
return &cpu_mask_none;
}
return &node_to_cpumask_map[node];
}
-EXPORT_SYMBOL(_node_to_cpumask_ptr);
+EXPORT_SYMBOL(cpumask_of_node);
/*
* Returns a bitmask of CPUs on Node 'node'.
diff --git a/arch/x86/kernel/sigframe.h b/arch/x86/kernel/sigframe.h
deleted file mode 100644
index cc673aa55ce..00000000000
--- a/arch/x86/kernel/sigframe.h
+++ /dev/null
@@ -1,42 +0,0 @@
-#ifdef CONFIG_X86_32
-struct sigframe {
- char __user *pretcode;
- int sig;
- struct sigcontext sc;
- /*
- * fpstate is unused. fpstate is moved/allocated after
- * retcode[] below. This movement allows to have the FP state and the
- * future state extensions (xsave) stay together.
- * And at the same time retaining the unused fpstate, prevents changing
- * the offset of extramask[] in the sigframe and thus prevent any
- * legacy application accessing/modifying it.
- */
- struct _fpstate fpstate_unused;
- unsigned long extramask[_NSIG_WORDS-1];
- char retcode[8];
- /* fp state follows here */
-};
-
-struct rt_sigframe {
- char __user *pretcode;
- int sig;
- struct siginfo __user *pinfo;
- void __user *puc;
- struct siginfo info;
- struct ucontext uc;
- char retcode[8];
- /* fp state follows here */
-};
-#else
-struct rt_sigframe {
- char __user *pretcode;
- struct ucontext uc;
- struct siginfo info;
- /* fp state follows here */
-};
-
-int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
- sigset_t *set, struct pt_regs *regs);
-int ia32_setup_frame(int sig, struct k_sigaction *ka,
- sigset_t *set, struct pt_regs *regs);
-#endif
diff --git a/arch/x86/kernel/signal_32.c b/arch/x86/kernel/signal.c
index d6dd057d0f2..89bb7668041 100644
--- a/arch/x86/kernel/signal_32.c
+++ b/arch/x86/kernel/signal.c
@@ -1,36 +1,41 @@
/*
* Copyright (C) 1991, 1992 Linus Torvalds
+ * Copyright (C) 2000, 2001, 2002 Andi Kleen SuSE Labs
*
* 1997-11-28 Modified for POSIX.1b signals by Richard Henderson
* 2000-06-20 Pentium III FXSR, SSE support by Gareth Hughes
+ * 2000-2002 x86-64 support by Andi Kleen
*/
-#include <linux/list.h>
-#include <linux/personality.h>
-#include <linux/binfmts.h>
-#include <linux/suspend.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
#include <linux/kernel.h>
-#include <linux/ptrace.h>
#include <linux/signal.h>
-#include <linux/stddef.h>
-#include <linux/unistd.h>
#include <linux/errno.h>
-#include <linux/sched.h>
#include <linux/wait.h>
+#include <linux/ptrace.h>
#include <linux/tracehook.h>
-#include <linux/elf.h>
-#include <linux/smp.h>
-#include <linux/mm.h>
+#include <linux/unistd.h>
+#include <linux/stddef.h>
+#include <linux/personality.h>
+#include <linux/uaccess.h>
#include <asm/processor.h>
#include <asm/ucontext.h>
-#include <asm/uaccess.h>
#include <asm/i387.h>
#include <asm/vdso.h>
+
+#ifdef CONFIG_X86_64
+#include <asm/proto.h>
+#include <asm/ia32_unistd.h>
+#include <asm/mce.h>
+#endif /* CONFIG_X86_64 */
+
#include <asm/syscall.h>
#include <asm/syscalls.h>
-#include "sigframe.h"
+#include <asm/sigframe.h>
#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
@@ -45,74 +50,6 @@
# define FIX_EFLAGS __FIX_EFLAGS
#endif
-/*
- * Atomically swap in the new signal mask, and wait for a signal.
- */
-asmlinkage int
-sys_sigsuspend(int history0, int history1, old_sigset_t mask)
-{
- mask &= _BLOCKABLE;
- spin_lock_irq(&current->sighand->siglock);
- current->saved_sigmask = current->blocked;
- siginitset(&current->blocked, mask);
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
-
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- set_restore_sigmask();
-
- return -ERESTARTNOHAND;
-}
-
-asmlinkage int
-sys_sigaction(int sig, const struct old_sigaction __user *act,
- struct old_sigaction __user *oact)
-{
- struct k_sigaction new_ka, old_ka;
- int ret;
-
- if (act) {
- old_sigset_t mask;
-
- if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
- __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
- __get_user(new_ka.sa.sa_restorer, &act->sa_restorer))
- return -EFAULT;
-
- __get_user(new_ka.sa.sa_flags, &act->sa_flags);
- __get_user(mask, &act->sa_mask);
- siginitset(&new_ka.sa.sa_mask, mask);
- }
-
- ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
-
- if (!ret && oact) {
- if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
- __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
- __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer))
- return -EFAULT;
-
- __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
- __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
- }
-
- return ret;
-}
-
-asmlinkage int sys_sigaltstack(unsigned long bx)
-{
- /*
- * This is needed to make gcc realize it doesn't own the
- * "struct pt_regs"
- */
- struct pt_regs *regs = (struct pt_regs *)&bx;
- const stack_t __user *uss = (const stack_t __user *)bx;
- stack_t __user *uoss = (stack_t __user *)regs->cx;
-
- return do_sigaltstack(uss, uoss, regs->sp);
-}
-
#define COPY(x) { \
err |= __get_user(regs->x, &sc->x); \
}
@@ -123,7 +60,7 @@ asmlinkage int sys_sigaltstack(unsigned long bx)
regs->seg = tmp; \
}
-#define COPY_SEG_STRICT(seg) { \
+#define COPY_SEG_CPL3(seg) { \
unsigned short tmp; \
err |= __get_user(tmp, &sc->seg); \
regs->seg = tmp | 3; \
@@ -135,9 +72,6 @@ asmlinkage int sys_sigaltstack(unsigned long bx)
loadsegment(seg, tmp); \
}
-/*
- * Do a signal return; undo the signal stack.
- */
static int
restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc,
unsigned long *pax)
@@ -149,14 +83,36 @@ restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc,
/* Always make any pending restarted system calls return -EINTR */
current_thread_info()->restart_block.fn = do_no_restart_syscall;
+#ifdef CONFIG_X86_32
GET_SEG(gs);
COPY_SEG(fs);
COPY_SEG(es);
COPY_SEG(ds);
+#endif /* CONFIG_X86_32 */
+
COPY(di); COPY(si); COPY(bp); COPY(sp); COPY(bx);
COPY(dx); COPY(cx); COPY(ip);
- COPY_SEG_STRICT(cs);
- COPY_SEG_STRICT(ss);
+
+#ifdef CONFIG_X86_64
+ COPY(r8);
+ COPY(r9);
+ COPY(r10);
+ COPY(r11);
+ COPY(r12);
+ COPY(r13);
+ COPY(r14);
+ COPY(r15);
+#endif /* CONFIG_X86_64 */
+
+#ifdef CONFIG_X86_32
+ COPY_SEG_CPL3(cs);
+ COPY_SEG_CPL3(ss);
+#else /* !CONFIG_X86_32 */
+ /* Kernel saves and restores only the CS segment register on signals,
+ * which is the bare minimum needed to allow mixed 32/64-bit code.
+ * App's signal handler can save/restore other segments if needed. */
+ COPY_SEG_CPL3(cs);
+#endif /* CONFIG_X86_32 */
err |= __get_user(tmpflags, &sc->flags);
regs->flags = (regs->flags & ~FIX_EFLAGS) | (tmpflags & FIX_EFLAGS);
@@ -169,102 +125,24 @@ restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc,
return err;
}
-asmlinkage unsigned long sys_sigreturn(unsigned long __unused)
-{
- struct sigframe __user *frame;
- struct pt_regs *regs;
- unsigned long ax;
- sigset_t set;
-
- regs = (struct pt_regs *) &__unused;
- frame = (struct sigframe __user *)(regs->sp - 8);
-
- if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
- goto badframe;
- if (__get_user(set.sig[0], &frame->sc.oldmask) || (_NSIG_WORDS > 1
- && __copy_from_user(&set.sig[1], &frame->extramask,
- sizeof(frame->extramask))))
- goto badframe;
-
- sigdelsetmask(&set, ~_BLOCKABLE);
- spin_lock_irq(&current->sighand->siglock);
- current->blocked = set;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
-
- if (restore_sigcontext(regs, &frame->sc, &ax))
- goto badframe;
- return ax;
-
-badframe:
- if (show_unhandled_signals && printk_ratelimit()) {
- printk("%s%s[%d] bad frame in sigreturn frame:"
- "%p ip:%lx sp:%lx oeax:%lx",
- task_pid_nr(current) > 1 ? KERN_INFO : KERN_EMERG,
- current->comm, task_pid_nr(current), frame, regs->ip,
- regs->sp, regs->orig_ax);
- print_vma_addr(" in ", regs->ip);
- printk(KERN_CONT "\n");
- }
-
- force_sig(SIGSEGV, current);
-
- return 0;
-}
-
-static long do_rt_sigreturn(struct pt_regs *regs)
-{
- struct rt_sigframe __user *frame;
- unsigned long ax;
- sigset_t set;
-
- frame = (struct rt_sigframe __user *)(regs->sp - sizeof(long));
- if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
- goto badframe;
- if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
- goto badframe;
-
- sigdelsetmask(&set, ~_BLOCKABLE);
- spin_lock_irq(&current->sighand->siglock);
- current->blocked = set;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
-
- if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &ax))
- goto badframe;
-
- if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->sp) == -EFAULT)
- goto badframe;
-
- return ax;
-
-badframe:
- signal_fault(regs, frame, "rt_sigreturn");
- return 0;
-}
-
-asmlinkage int sys_rt_sigreturn(unsigned long __unused)
-{
- struct pt_regs *regs = (struct pt_regs *)&__unused;
-
- return do_rt_sigreturn(regs);
-}
-
-/*
- * Set up a signal frame.
- */
static int
setup_sigcontext(struct sigcontext __user *sc, void __user *fpstate,
struct pt_regs *regs, unsigned long mask)
{
- int tmp, err = 0;
+ int err = 0;
- err |= __put_user(regs->fs, (unsigned int __user *)&sc->fs);
- savesegment(gs, tmp);
- err |= __put_user(tmp, (unsigned int __user *)&sc->gs);
+#ifdef CONFIG_X86_32
+ {
+ unsigned int tmp;
+ savesegment(gs, tmp);
+ err |= __put_user(tmp, (unsigned int __user *)&sc->gs);
+ }
+ err |= __put_user(regs->fs, (unsigned int __user *)&sc->fs);
err |= __put_user(regs->es, (unsigned int __user *)&sc->es);
err |= __put_user(regs->ds, (unsigned int __user *)&sc->ds);
+#endif /* CONFIG_X86_32 */
+
err |= __put_user(regs->di, &sc->di);
err |= __put_user(regs->si, &sc->si);
err |= __put_user(regs->bp, &sc->bp);
@@ -273,19 +151,33 @@ setup_sigcontext(struct sigcontext __user *sc, void __user *fpstate,
err |= __put_user(regs->dx, &sc->dx);
err |= __put_user(regs->cx, &sc->cx);
err |= __put_user(regs->ax, &sc->ax);
+#ifdef CONFIG_X86_64
+ err |= __put_user(regs->r8, &sc->r8);
+ err |= __put_user(regs->r9, &sc->r9);
+ err |= __put_user(regs->r10, &sc->r10);
+ err |= __put_user(regs->r11, &sc->r11);
+ err |= __put_user(regs->r12, &sc->r12);
+ err |= __put_user(regs->r13, &sc->r13);
+ err |= __put_user(regs->r14, &sc->r14);
+ err |= __put_user(regs->r15, &sc->r15);
+#endif /* CONFIG_X86_64 */
+
err |= __put_user(current->thread.trap_no, &sc->trapno);
err |= __put_user(current->thread.error_code, &sc->err);
err |= __put_user(regs->ip, &sc->ip);
+#ifdef CONFIG_X86_32
err |= __put_user(regs->cs, (unsigned int __user *)&sc->cs);
err |= __put_user(regs->flags, &sc->flags);
err |= __put_user(regs->sp, &sc->sp_at_signal);
err |= __put_user(regs->ss, (unsigned int __user *)&sc->ss);
+#else /* !CONFIG_X86_32 */
+ err |= __put_user(regs->flags, &sc->flags);
+ err |= __put_user(regs->cs, &sc->cs);
+ err |= __put_user(0, &sc->gs);
+ err |= __put_user(0, &sc->fs);
+#endif /* CONFIG_X86_32 */
- tmp = save_i387_xstate(fpstate);
- if (tmp < 0)
- err = 1;
- else
- err |= __put_user(tmp ? fpstate : NULL, &sc->fpstate);
+ err |= __put_user(fpstate, &sc->fpstate);
/* non-iBCS2 extensions.. */
err |= __put_user(mask, &sc->oldmask);
@@ -295,6 +187,32 @@ setup_sigcontext(struct sigcontext __user *sc, void __user *fpstate,
}
/*
+ * Set up a signal frame.
+ */
+#ifdef CONFIG_X86_32
+static const struct {
+ u16 poplmovl;
+ u32 val;
+ u16 int80;
+} __attribute__((packed)) retcode = {
+ 0xb858, /* popl %eax; movl $..., %eax */
+ __NR_sigreturn,
+ 0x80cd, /* int $0x80 */
+};
+
+static const struct {
+ u8 movl;
+ u32 val;
+ u16 int80;
+ u8 pad;
+} __attribute__((packed)) rt_retcode = {
+ 0xb8, /* movl $..., %eax */
+ __NR_rt_sigreturn,
+ 0x80cd, /* int $0x80 */
+ 0
+};
+
+/*
* Determine which stack to use..
*/
static inline void __user *
@@ -328,6 +246,8 @@ get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size,
if (used_math()) {
sp = sp - sig_xstate_size;
*fpstate = (struct _fpstate *) sp;
+ if (save_i387_xstate(*fpstate) < 0)
+ return (void __user *)-1L;
}
sp -= frame_size;
@@ -383,9 +303,7 @@ __setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
* reasons and because gdb uses it as a signature to notice
* signal handler stack frames.
*/
- err |= __put_user(0xb858, (short __user *)(frame->retcode+0));
- err |= __put_user(__NR_sigreturn, (int __user *)(frame->retcode+2));
- err |= __put_user(0x80cd, (short __user *)(frame->retcode+6));
+ err |= __put_user(*((u64 *)&retcode), (u64 *)frame->retcode);
if (err)
return -EFAULT;
@@ -454,9 +372,7 @@ static int __setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
* reasons and because gdb uses it as a signature to notice
* signal handler stack frames.
*/
- err |= __put_user(0xb8, (char __user *)(frame->retcode+0));
- err |= __put_user(__NR_rt_sigreturn, (int __user *)(frame->retcode+1));
- err |= __put_user(0x80cd, (short __user *)(frame->retcode+5));
+ err |= __put_user(*((u64 *)&rt_retcode), (u64 *)frame->retcode);
if (err)
return -EFAULT;
@@ -475,23 +391,293 @@ static int __setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
return 0;
}
+#else /* !CONFIG_X86_32 */
+/*
+ * Determine which stack to use..
+ */
+static void __user *
+get_stack(struct k_sigaction *ka, unsigned long sp, unsigned long size)
+{
+ /* Default to using normal stack - redzone*/
+ sp -= 128;
+
+ /* This is the X/Open sanctioned signal stack switching. */
+ if (ka->sa.sa_flags & SA_ONSTACK) {
+ if (sas_ss_flags(sp) == 0)
+ sp = current->sas_ss_sp + current->sas_ss_size;
+ }
+
+ return (void __user *)round_down(sp - size, 64);
+}
+
+static int __setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
+ sigset_t *set, struct pt_regs *regs)
+{
+ struct rt_sigframe __user *frame;
+ void __user *fp = NULL;
+ int err = 0;
+ struct task_struct *me = current;
+
+ if (used_math()) {
+ fp = get_stack(ka, regs->sp, sig_xstate_size);
+ frame = (void __user *)round_down(
+ (unsigned long)fp - sizeof(struct rt_sigframe), 16) - 8;
+
+ if (save_i387_xstate(fp) < 0)
+ return -EFAULT;
+ } else
+ frame = get_stack(ka, regs->sp, sizeof(struct rt_sigframe)) - 8;
+
+ if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
+ return -EFAULT;
+
+ if (ka->sa.sa_flags & SA_SIGINFO) {
+ if (copy_siginfo_to_user(&frame->info, info))
+ return -EFAULT;
+ }
+
+ /* Create the ucontext. */
+ if (cpu_has_xsave)
+ err |= __put_user(UC_FP_XSTATE, &frame->uc.uc_flags);
+ else
+ err |= __put_user(0, &frame->uc.uc_flags);
+ err |= __put_user(0, &frame->uc.uc_link);
+ err |= __put_user(me->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
+ err |= __put_user(sas_ss_flags(regs->sp),
+ &frame->uc.uc_stack.ss_flags);
+ err |= __put_user(me->sas_ss_size, &frame->uc.uc_stack.ss_size);
+ err |= setup_sigcontext(&frame->uc.uc_mcontext, fp, regs, set->sig[0]);
+ err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
+
+ /* Set up to return from userspace. If provided, use a stub
+ already in userspace. */
+ /* x86-64 should always use SA_RESTORER. */
+ if (ka->sa.sa_flags & SA_RESTORER) {
+ err |= __put_user(ka->sa.sa_restorer, &frame->pretcode);
+ } else {
+ /* could use a vstub here */
+ return -EFAULT;
+ }
+
+ if (err)
+ return -EFAULT;
+
+ /* Set up registers for signal handler */
+ regs->di = sig;
+ /* In case the signal handler was declared without prototypes */
+ regs->ax = 0;
+
+ /* This also works for non SA_SIGINFO handlers because they expect the
+ next argument after the signal number on the stack. */
+ regs->si = (unsigned long)&frame->info;
+ regs->dx = (unsigned long)&frame->uc;
+ regs->ip = (unsigned long) ka->sa.sa_handler;
+
+ regs->sp = (unsigned long)frame;
+
+ /* Set up the CS register to run signal handlers in 64-bit mode,
+ even if the handler happens to be interrupting 32-bit code. */
+ regs->cs = __USER_CS;
+
+ return 0;
+}
+#endif /* CONFIG_X86_32 */
+
+#ifdef CONFIG_X86_32
+/*
+ * Atomically swap in the new signal mask, and wait for a signal.
+ */
+asmlinkage int
+sys_sigsuspend(int history0, int history1, old_sigset_t mask)
+{
+ mask &= _BLOCKABLE;
+ spin_lock_irq(&current->sighand->siglock);
+ current->saved_sigmask = current->blocked;
+ siginitset(&current->blocked, mask);
+ recalc_sigpending();
+ spin_unlock_irq(&current->sighand->siglock);
+
+ current->state = TASK_INTERRUPTIBLE;
+ schedule();
+ set_restore_sigmask();
+
+ return -ERESTARTNOHAND;
+}
+
+asmlinkage int
+sys_sigaction(int sig, const struct old_sigaction __user *act,
+ struct old_sigaction __user *oact)
+{
+ struct k_sigaction new_ka, old_ka;
+ int ret;
+
+ if (act) {
+ old_sigset_t mask;
+
+ if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
+ __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
+ __get_user(new_ka.sa.sa_restorer, &act->sa_restorer))
+ return -EFAULT;
+
+ __get_user(new_ka.sa.sa_flags, &act->sa_flags);
+ __get_user(mask, &act->sa_mask);
+ siginitset(&new_ka.sa.sa_mask, mask);
+ }
+
+ ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
+
+ if (!ret && oact) {
+ if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
+ __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
+ __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer))
+ return -EFAULT;
+
+ __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
+ __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
+ }
+
+ return ret;
+}
+#endif /* CONFIG_X86_32 */
+
+#ifdef CONFIG_X86_32
+asmlinkage int sys_sigaltstack(unsigned long bx)
+{
+ /*
+ * This is needed to make gcc realize it doesn't own the
+ * "struct pt_regs"
+ */
+ struct pt_regs *regs = (struct pt_regs *)&bx;
+ const stack_t __user *uss = (const stack_t __user *)bx;
+ stack_t __user *uoss = (stack_t __user *)regs->cx;
+
+ return do_sigaltstack(uss, uoss, regs->sp);
+}
+#else /* !CONFIG_X86_32 */
+asmlinkage long
+sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
+ struct pt_regs *regs)
+{
+ return do_sigaltstack(uss, uoss, regs->sp);
+}
+#endif /* CONFIG_X86_32 */
+
+/*
+ * Do a signal return; undo the signal stack.
+ */
+#ifdef CONFIG_X86_32
+asmlinkage unsigned long sys_sigreturn(unsigned long __unused)
+{
+ struct sigframe __user *frame;
+ struct pt_regs *regs;
+ unsigned long ax;
+ sigset_t set;
+
+ regs = (struct pt_regs *) &__unused;
+ frame = (struct sigframe __user *)(regs->sp - 8);
+
+ if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
+ goto badframe;
+ if (__get_user(set.sig[0], &frame->sc.oldmask) || (_NSIG_WORDS > 1
+ && __copy_from_user(&set.sig[1], &frame->extramask,
+ sizeof(frame->extramask))))
+ goto badframe;
+
+ sigdelsetmask(&set, ~_BLOCKABLE);
+ spin_lock_irq(&current->sighand->siglock);
+ current->blocked = set;
+ recalc_sigpending();
+ spin_unlock_irq(&current->sighand->siglock);
+
+ if (restore_sigcontext(regs, &frame->sc, &ax))
+ goto badframe;
+ return ax;
+
+badframe:
+ signal_fault(regs, frame, "sigreturn");
+
+ return 0;
+}
+#endif /* CONFIG_X86_32 */
+
+static long do_rt_sigreturn(struct pt_regs *regs)
+{
+ struct rt_sigframe __user *frame;
+ unsigned long ax;
+ sigset_t set;
+
+ frame = (struct rt_sigframe __user *)(regs->sp - sizeof(long));
+ if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
+ goto badframe;
+ if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
+ goto badframe;
+
+ sigdelsetmask(&set, ~_BLOCKABLE);
+ spin_lock_irq(&current->sighand->siglock);
+ current->blocked = set;
+ recalc_sigpending();
+ spin_unlock_irq(&current->sighand->siglock);
+
+ if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &ax))
+ goto badframe;
+
+ if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->sp) == -EFAULT)
+ goto badframe;
+
+ return ax;
+
+badframe:
+ signal_fault(regs, frame, "rt_sigreturn");
+ return 0;
+}
+
+#ifdef CONFIG_X86_32
+asmlinkage int sys_rt_sigreturn(struct pt_regs regs)
+{
+ return do_rt_sigreturn(&regs);
+}
+#else /* !CONFIG_X86_32 */
+asmlinkage long sys_rt_sigreturn(struct pt_regs *regs)
+{
+ return do_rt_sigreturn(regs);
+}
+#endif /* CONFIG_X86_32 */
/*
* OK, we're invoking a handler:
*/
static int signr_convert(int sig)
{
+#ifdef CONFIG_X86_32
struct thread_info *info = current_thread_info();
if (info->exec_domain && info->exec_domain->signal_invmap && sig < 32)
return info->exec_domain->signal_invmap[sig];
+#endif /* CONFIG_X86_32 */
return sig;
}
+#ifdef CONFIG_X86_32
+
#define is_ia32 1
#define ia32_setup_frame __setup_frame
#define ia32_setup_rt_frame __setup_rt_frame
+#else /* !CONFIG_X86_32 */
+
+#ifdef CONFIG_IA32_EMULATION
+#define is_ia32 test_thread_flag(TIF_IA32)
+#else /* !CONFIG_IA32_EMULATION */
+#define is_ia32 0
+#endif /* CONFIG_IA32_EMULATION */
+
+int ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
+ sigset_t *set, struct pt_regs *regs);
+int ia32_setup_frame(int sig, struct k_sigaction *ka,
+ sigset_t *set, struct pt_regs *regs);
+
+#endif /* CONFIG_X86_32 */
+
static int
setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
sigset_t *set, struct pt_regs *regs)
@@ -592,7 +778,13 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
return 0;
}
+#ifdef CONFIG_X86_32
#define NR_restart_syscall __NR_restart_syscall
+#else /* !CONFIG_X86_32 */
+#define NR_restart_syscall \
+ test_thread_flag(TIF_IA32) ? __NR_ia32_restart_syscall : __NR_restart_syscall
+#endif /* CONFIG_X86_32 */
+
/*
* Note that 'init' is a special process: it doesn't get signals it doesn't
* want to handle. Thus you cannot kill init even with a SIGKILL even by
@@ -704,8 +896,9 @@ void signal_fault(struct pt_regs *regs, void __user *frame, char *where)
struct task_struct *me = current;
if (show_unhandled_signals && printk_ratelimit()) {
- printk(KERN_INFO
+ printk("%s"
"%s[%d] bad frame in %s frame:%p ip:%lx sp:%lx orax:%lx",
+ task_pid_nr(current) > 1 ? KERN_INFO : KERN_EMERG,
me->comm, me->pid, where, frame,
regs->ip, regs->sp, regs->orig_ax);
print_vma_addr(" in ", regs->ip);
diff --git a/arch/x86/kernel/signal_64.c b/arch/x86/kernel/signal_64.c
deleted file mode 100644
index a5c9627f4db..00000000000
--- a/arch/x86/kernel/signal_64.c
+++ /dev/null
@@ -1,516 +0,0 @@
-/*
- * Copyright (C) 1991, 1992 Linus Torvalds
- * Copyright (C) 2000, 2001, 2002 Andi Kleen SuSE Labs
- *
- * 1997-11-28 Modified for POSIX.1b signals by Richard Henderson
- * 2000-06-20 Pentium III FXSR, SSE support by Gareth Hughes
- * 2000-2002 x86-64 support by Andi Kleen
- */
-
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
-#include <linux/kernel.h>
-#include <linux/signal.h>
-#include <linux/errno.h>
-#include <linux/wait.h>
-#include <linux/ptrace.h>
-#include <linux/tracehook.h>
-#include <linux/unistd.h>
-#include <linux/stddef.h>
-#include <linux/personality.h>
-#include <linux/compiler.h>
-#include <linux/uaccess.h>
-
-#include <asm/processor.h>
-#include <asm/ucontext.h>
-#include <asm/i387.h>
-#include <asm/proto.h>
-#include <asm/ia32_unistd.h>
-#include <asm/mce.h>
-#include <asm/syscall.h>
-#include <asm/syscalls.h>
-#include "sigframe.h"
-
-#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
-
-#define __FIX_EFLAGS (X86_EFLAGS_AC | X86_EFLAGS_OF | \
- X86_EFLAGS_DF | X86_EFLAGS_TF | X86_EFLAGS_SF | \
- X86_EFLAGS_ZF | X86_EFLAGS_AF | X86_EFLAGS_PF | \
- X86_EFLAGS_CF)
-
-#ifdef CONFIG_X86_32
-# define FIX_EFLAGS (__FIX_EFLAGS | X86_EFLAGS_RF)
-#else
-# define FIX_EFLAGS __FIX_EFLAGS
-#endif
-
-asmlinkage long
-sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
- struct pt_regs *regs)
-{
- return do_sigaltstack(uss, uoss, regs->sp);
-}
-
-#define COPY(x) { \
- err |= __get_user(regs->x, &sc->x); \
-}
-
-#define COPY_SEG_STRICT(seg) { \
- unsigned short tmp; \
- err |= __get_user(tmp, &sc->seg); \
- regs->seg = tmp | 3; \
-}
-
-/*
- * Do a signal return; undo the signal stack.
- */
-static int
-restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc,
- unsigned long *pax)
-{
- void __user *buf;
- unsigned int tmpflags;
- unsigned int err = 0;
-
- /* Always make any pending restarted system calls return -EINTR */
- current_thread_info()->restart_block.fn = do_no_restart_syscall;
-
- COPY(di); COPY(si); COPY(bp); COPY(sp); COPY(bx);
- COPY(dx); COPY(cx); COPY(ip);
- COPY(r8);
- COPY(r9);
- COPY(r10);
- COPY(r11);
- COPY(r12);
- COPY(r13);
- COPY(r14);
- COPY(r15);
-
- /* Kernel saves and restores only the CS segment register on signals,
- * which is the bare minimum needed to allow mixed 32/64-bit code.
- * App's signal handler can save/restore other segments if needed. */
- COPY_SEG_STRICT(cs);
-
- err |= __get_user(tmpflags, &sc->flags);
- regs->flags = (regs->flags & ~FIX_EFLAGS) | (tmpflags & FIX_EFLAGS);
- regs->orig_ax = -1; /* disable syscall checks */
-
- err |= __get_user(buf, &sc->fpstate);
- err |= restore_i387_xstate(buf);
-
- err |= __get_user(*pax, &sc->ax);
- return err;
-}
-
-static long do_rt_sigreturn(struct pt_regs *regs)
-{
- struct rt_sigframe __user *frame;
- unsigned long ax;
- sigset_t set;
-
- frame = (struct rt_sigframe __user *)(regs->sp - sizeof(long));
- if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
- goto badframe;
- if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
- goto badframe;
-
- sigdelsetmask(&set, ~_BLOCKABLE);
- spin_lock_irq(&current->sighand->siglock);
- current->blocked = set;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
-
- if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &ax))
- goto badframe;
-
- if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->sp) == -EFAULT)
- goto badframe;
-
- return ax;
-
-badframe:
- signal_fault(regs, frame, "rt_sigreturn");
- return 0;
-}
-
-asmlinkage long sys_rt_sigreturn(struct pt_regs *regs)
-{
- return do_rt_sigreturn(regs);
-}
-
-/*
- * Set up a signal frame.
- */
-
-static inline int
-setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs,
- unsigned long mask, struct task_struct *me)
-{
- int err = 0;
-
- err |= __put_user(regs->cs, &sc->cs);
- err |= __put_user(0, &sc->gs);
- err |= __put_user(0, &sc->fs);
-
- err |= __put_user(regs->di, &sc->di);
- err |= __put_user(regs->si, &sc->si);
- err |= __put_user(regs->bp, &sc->bp);
- err |= __put_user(regs->sp, &sc->sp);
- err |= __put_user(regs->bx, &sc->bx);
- err |= __put_user(regs->dx, &sc->dx);
- err |= __put_user(regs->cx, &sc->cx);
- err |= __put_user(regs->ax, &sc->ax);
- err |= __put_user(regs->r8, &sc->r8);
- err |= __put_user(regs->r9, &sc->r9);
- err |= __put_user(regs->r10, &sc->r10);
- err |= __put_user(regs->r11, &sc->r11);
- err |= __put_user(regs->r12, &sc->r12);
- err |= __put_user(regs->r13, &sc->r13);
- err |= __put_user(regs->r14, &sc->r14);
- err |= __put_user(regs->r15, &sc->r15);
- err |= __put_user(me->thread.trap_no, &sc->trapno);
- err |= __put_user(me->thread.error_code, &sc->err);
- err |= __put_user(regs->ip, &sc->ip);
- err |= __put_user(regs->flags, &sc->flags);
- err |= __put_user(mask, &sc->oldmask);
- err |= __put_user(me->thread.cr2, &sc->cr2);
-
- return err;
-}
-
-/*
- * Determine which stack to use..
- */
-
-static void __user *
-get_stack(struct k_sigaction *ka, struct pt_regs *regs, unsigned long size)
-{
- unsigned long sp;
-
- /* Default to using normal stack - redzone*/
- sp = regs->sp - 128;
-
- /* This is the X/Open sanctioned signal stack switching. */
- if (ka->sa.sa_flags & SA_ONSTACK) {
- if (sas_ss_flags(sp) == 0)
- sp = current->sas_ss_sp + current->sas_ss_size;
- }
-
- return (void __user *)round_down(sp - size, 64);
-}
-
-static int __setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
- sigset_t *set, struct pt_regs *regs)
-{
- struct rt_sigframe __user *frame;
- void __user *fp = NULL;
- int err = 0;
- struct task_struct *me = current;
-
- if (used_math()) {
- fp = get_stack(ka, regs, sig_xstate_size);
- frame = (void __user *)round_down(
- (unsigned long)fp - sizeof(struct rt_sigframe), 16) - 8;
-
- if (save_i387_xstate(fp) < 0)
- return -EFAULT;
- } else
- frame = get_stack(ka, regs, sizeof(struct rt_sigframe)) - 8;
-
- if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
- return -EFAULT;
-
- if (ka->sa.sa_flags & SA_SIGINFO) {
- if (copy_siginfo_to_user(&frame->info, info))
- return -EFAULT;
- }
-
- /* Create the ucontext. */
- if (cpu_has_xsave)
- err |= __put_user(UC_FP_XSTATE, &frame->uc.uc_flags);
- else
- err |= __put_user(0, &frame->uc.uc_flags);
- err |= __put_user(0, &frame->uc.uc_link);
- err |= __put_user(me->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
- err |= __put_user(sas_ss_flags(regs->sp),
- &frame->uc.uc_stack.ss_flags);
- err |= __put_user(me->sas_ss_size, &frame->uc.uc_stack.ss_size);
- err |= setup_sigcontext(&frame->uc.uc_mcontext, regs, set->sig[0], me);
- err |= __put_user(fp, &frame->uc.uc_mcontext.fpstate);
- if (sizeof(*set) == 16) {
- __put_user(set->sig[0], &frame->uc.uc_sigmask.sig[0]);
- __put_user(set->sig[1], &frame->uc.uc_sigmask.sig[1]);
- } else
- err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
-
- /* Set up to return from userspace. If provided, use a stub
- already in userspace. */
- /* x86-64 should always use SA_RESTORER. */
- if (ka->sa.sa_flags & SA_RESTORER) {
- err |= __put_user(ka->sa.sa_restorer, &frame->pretcode);
- } else {
- /* could use a vstub here */
- return -EFAULT;
- }
-
- if (err)
- return -EFAULT;
-
- /* Set up registers for signal handler */
- regs->di = sig;
- /* In case the signal handler was declared without prototypes */
- regs->ax = 0;
-
- /* This also works for non SA_SIGINFO handlers because they expect the
- next argument after the signal number on the stack. */
- regs->si = (unsigned long)&frame->info;
- regs->dx = (unsigned long)&frame->uc;
- regs->ip = (unsigned long) ka->sa.sa_handler;
-
- regs->sp = (unsigned long)frame;
-
- /* Set up the CS register to run signal handlers in 64-bit mode,
- even if the handler happens to be interrupting 32-bit code. */
- regs->cs = __USER_CS;
-
- return 0;
-}
-
-/*
- * OK, we're invoking a handler
- */
-static int signr_convert(int sig)
-{
- return sig;
-}
-
-#ifdef CONFIG_IA32_EMULATION
-#define is_ia32 test_thread_flag(TIF_IA32)
-#else
-#define is_ia32 0
-#endif
-
-static int
-setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
- sigset_t *set, struct pt_regs *regs)
-{
- int usig = signr_convert(sig);
- int ret;
-
- /* Set up the stack frame */
- if (is_ia32) {
- if (ka->sa.sa_flags & SA_SIGINFO)
- ret = ia32_setup_rt_frame(usig, ka, info, set, regs);
- else
- ret = ia32_setup_frame(usig, ka, set, regs);
- } else
- ret = __setup_rt_frame(sig, ka, info, set, regs);
-
- if (ret) {
- force_sigsegv(sig, current);
- return -EFAULT;
- }
-
- return ret;
-}
-
-static int
-handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
- sigset_t *oldset, struct pt_regs *regs)
-{
- int ret;
-
- /* Are we from a system call? */
- if (syscall_get_nr(current, regs) >= 0) {
- /* If so, check system call restarting.. */
- switch (syscall_get_error(current, regs)) {
- case -ERESTART_RESTARTBLOCK:
- case -ERESTARTNOHAND:
- regs->ax = -EINTR;
- break;
-
- case -ERESTARTSYS:
- if (!(ka->sa.sa_flags & SA_RESTART)) {
- regs->ax = -EINTR;
- break;
- }
- /* fallthrough */
- case -ERESTARTNOINTR:
- regs->ax = regs->orig_ax;
- regs->ip -= 2;
- break;
- }
- }
-
- /*
- * If TF is set due to a debugger (TIF_FORCED_TF), clear the TF
- * flag so that register information in the sigcontext is correct.
- */
- if (unlikely(regs->flags & X86_EFLAGS_TF) &&
- likely(test_and_clear_thread_flag(TIF_FORCED_TF)))
- regs->flags &= ~X86_EFLAGS_TF;
-
- ret = setup_rt_frame(sig, ka, info, oldset, regs);
-
- if (ret)
- return ret;
-
-#ifdef CONFIG_X86_64
- /*
- * This has nothing to do with segment registers,
- * despite the name. This magic affects uaccess.h
- * macros' behavior. Reset it to the normal setting.
- */
- set_fs(USER_DS);
-#endif
-
- /*
- * Clear the direction flag as per the ABI for function entry.
- */
- regs->flags &= ~X86_EFLAGS_DF;
-
- /*
- * Clear TF when entering the signal handler, but
- * notify any tracer that was single-stepping it.
- * The tracer may want to single-step inside the
- * handler too.
- */
- regs->flags &= ~X86_EFLAGS_TF;
-
- spin_lock_irq(&current->sighand->siglock);
- sigorsets(&current->blocked, &current->blocked, &ka->sa.sa_mask);
- if (!(ka->sa.sa_flags & SA_NODEFER))
- sigaddset(&current->blocked, sig);
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
-
- tracehook_signal_handler(sig, info, ka, regs,
- test_thread_flag(TIF_SINGLESTEP));
-
- return 0;
-}
-
-#define NR_restart_syscall \
- test_thread_flag(TIF_IA32) ? __NR_ia32_restart_syscall : __NR_restart_syscall
-/*
- * Note that 'init' is a special process: it doesn't get signals it doesn't
- * want to handle. Thus you cannot kill init even with a SIGKILL even by
- * mistake.
- */
-static void do_signal(struct pt_regs *regs)
-{
- struct k_sigaction ka;
- siginfo_t info;
- int signr;
- sigset_t *oldset;
-
- /*
- * We want the common case to go fast, which is why we may in certain
- * cases get here from kernel mode. Just return without doing anything
- * if so.
- * X86_32: vm86 regs switched out by assembly code before reaching
- * here, so testing against kernel CS suffices.
- */
- if (!user_mode(regs))
- return;
-
- if (current_thread_info()->status & TS_RESTORE_SIGMASK)
- oldset = &current->saved_sigmask;
- else
- oldset = &current->blocked;
-
- signr = get_signal_to_deliver(&info, &ka, regs, NULL);
- if (signr > 0) {
- /*
- * Re-enable any watchpoints before delivering the
- * signal to user space. The processor register will
- * have been cleared if the watchpoint triggered
- * inside the kernel.
- */
- if (current->thread.debugreg7)
- set_debugreg(current->thread.debugreg7, 7);
-
- /* Whee! Actually deliver the signal. */
- if (handle_signal(signr, &info, &ka, oldset, regs) == 0) {
- /*
- * A signal was successfully delivered; the saved
- * sigmask will have been stored in the signal frame,
- * and will be restored by sigreturn, so we can simply
- * clear the TS_RESTORE_SIGMASK flag.
- */
- current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
- }
- return;
- }
-
- /* Did we come from a system call? */
- if (syscall_get_nr(current, regs) >= 0) {
- /* Restart the system call - no handlers present */
- switch (syscall_get_error(current, regs)) {
- case -ERESTARTNOHAND:
- case -ERESTARTSYS:
- case -ERESTARTNOINTR:
- regs->ax = regs->orig_ax;
- regs->ip -= 2;
- break;
-
- case -ERESTART_RESTARTBLOCK:
- regs->ax = NR_restart_syscall;
- regs->ip -= 2;
- break;
- }
- }
-
- /*
- * If there's no signal to deliver, we just put the saved sigmask
- * back.
- */
- if (current_thread_info()->status & TS_RESTORE_SIGMASK) {
- current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
- sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
- }
-}
-
-/*
- * notification of userspace execution resumption
- * - triggered by the TIF_WORK_MASK flags
- */
-void
-do_notify_resume(struct pt_regs *regs, void *unused, __u32 thread_info_flags)
-{
-#if defined(CONFIG_X86_64) && defined(CONFIG_X86_MCE)
- /* notify userspace of pending MCEs */
- if (thread_info_flags & _TIF_MCE_NOTIFY)
- mce_notify_user();
-#endif /* CONFIG_X86_64 && CONFIG_X86_MCE */
-
- /* deal with pending signal delivery */
- if (thread_info_flags & _TIF_SIGPENDING)
- do_signal(regs);
-
- if (thread_info_flags & _TIF_NOTIFY_RESUME) {
- clear_thread_flag(TIF_NOTIFY_RESUME);
- tracehook_notify_resume(regs);
- }
-
-#ifdef CONFIG_X86_32
- clear_thread_flag(TIF_IRET);
-#endif /* CONFIG_X86_32 */
-}
-
-void signal_fault(struct pt_regs *regs, void __user *frame, char *where)
-{
- struct task_struct *me = current;
-
- if (show_unhandled_signals && printk_ratelimit()) {
- printk(KERN_INFO
- "%s[%d] bad frame in %s frame:%p ip:%lx sp:%lx orax:%lx",
- me->comm, me->pid, where, frame,
- regs->ip, regs->sp, regs->orig_ax);
- print_vma_addr(" in ", regs->ip);
- printk(KERN_CONT "\n");
- }
-
- force_sig(SIGSEGV, me);
-}
diff --git a/arch/x86/kernel/smp.c b/arch/x86/kernel/smp.c
index 49ed667b06f..beea2649a24 100644
--- a/arch/x86/kernel/smp.c
+++ b/arch/x86/kernel/smp.c
@@ -165,11 +165,7 @@ static void native_smp_send_stop(void)
void smp_reschedule_interrupt(struct pt_regs *regs)
{
ack_APIC_irq();
-#ifdef CONFIG_X86_32
- __get_cpu_var(irq_stat).irq_resched_count++;
-#else
- add_pda(irq_resched_count, 1);
-#endif
+ inc_irq_stat(irq_resched_count);
}
void smp_call_function_interrupt(struct pt_regs *regs)
@@ -177,11 +173,7 @@ void smp_call_function_interrupt(struct pt_regs *regs)
ack_APIC_irq();
irq_enter();
generic_smp_call_function_interrupt();
-#ifdef CONFIG_X86_32
- __get_cpu_var(irq_stat).irq_call_count++;
-#else
- add_pda(irq_call_count, 1);
-#endif
+ inc_irq_stat(irq_call_count);
irq_exit();
}
@@ -190,11 +182,7 @@ void smp_call_function_single_interrupt(struct pt_regs *regs)
ack_APIC_irq();
irq_enter();
generic_smp_call_function_single_interrupt();
-#ifdef CONFIG_X86_32
- __get_cpu_var(irq_stat).irq_call_count++;
-#else
- add_pda(irq_call_count, 1);
-#endif
+ inc_irq_stat(irq_call_count);
irq_exit();
}
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 1a9941b1115..9e177a4077e 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -282,7 +282,7 @@ static int __cpuinitdata unsafe_smp;
/*
* Activate a secondary processor.
*/
-static void __cpuinit start_secondary(void *unused)
+notrace static void __cpuinit start_secondary(void *unused)
{
/*
* Don't put *anything* before cpu_init(), SMP booting is too
@@ -496,7 +496,7 @@ void __cpuinit set_cpu_sibling_map(int cpu)
}
/* maps the cpu to the sched domain representing multi-core */
-cpumask_t cpu_coregroup_map(int cpu)
+const struct cpumask *cpu_coregroup_mask(int cpu)
{
struct cpuinfo_x86 *c = &cpu_data(cpu);
/*
@@ -504,9 +504,14 @@ cpumask_t cpu_coregroup_map(int cpu)
* And for power savings, we return cpu_core_map
*/
if (sched_mc_power_savings || sched_smt_power_savings)
- return per_cpu(cpu_core_map, cpu);
+ return &per_cpu(cpu_core_map, cpu);
else
- return c->llc_shared_map;
+ return &c->llc_shared_map;
+}
+
+cpumask_t cpu_coregroup_map(int cpu)
+{
+ return *cpu_coregroup_mask(cpu);
}
static void impress_friends(void)
@@ -1075,8 +1080,10 @@ static int __init smp_sanity_check(unsigned max_cpus)
#endif
if (!physid_isset(hard_smp_processor_id(), phys_cpu_present_map)) {
- printk(KERN_WARNING "weird, boot CPU (#%d) not listed"
- "by the BIOS.\n", hard_smp_processor_id());
+ printk(KERN_WARNING
+ "weird, boot CPU (#%d) not listed by the BIOS.\n",
+ hard_smp_processor_id());
+
physid_set(hard_smp_processor_id(), phys_cpu_present_map);
}
diff --git a/arch/x86/kernel/time_32.c b/arch/x86/kernel/time_32.c
index 77b400f06ea..65309e4cb1c 100644
--- a/arch/x86/kernel/time_32.c
+++ b/arch/x86/kernel/time_32.c
@@ -75,7 +75,7 @@ EXPORT_SYMBOL(profile_pc);
irqreturn_t timer_interrupt(int irq, void *dev_id)
{
/* Keep nmi watchdog up to date */
- per_cpu(irq_stat, smp_processor_id()).irq0_irqs++;
+ inc_irq_stat(irq0_irqs);
#ifdef CONFIG_X86_IO_APIC
if (timer_ack) {
diff --git a/arch/x86/kernel/time_64.c b/arch/x86/kernel/time_64.c
index cb19d650c21..891e7a7c433 100644
--- a/arch/x86/kernel/time_64.c
+++ b/arch/x86/kernel/time_64.c
@@ -49,9 +49,9 @@ unsigned long profile_pc(struct pt_regs *regs)
}
EXPORT_SYMBOL(profile_pc);
-irqreturn_t timer_interrupt(int irq, void *dev_id)
+static irqreturn_t timer_interrupt(int irq, void *dev_id)
{
- add_pda(irq0_irqs, 1);
+ inc_irq_stat(irq0_irqs);
global_clock_event->event_handler(global_clock_event);
@@ -80,6 +80,8 @@ unsigned long __init calibrate_cpu(void)
break;
no_ctr_free = (i == 4);
if (no_ctr_free) {
+ WARN(1, KERN_WARNING "Warning: AMD perfctrs busy ... "
+ "cpu_khz value may be incorrect.\n");
i = 3;
rdmsrl(MSR_K7_EVNTSEL3, evntsel3);
wrmsrl(MSR_K7_EVNTSEL3, 0);
diff --git a/arch/x86/kernel/tlb_32.c b/arch/x86/kernel/tlb_32.c
index 174ea90d1cb..ce505464224 100644
--- a/arch/x86/kernel/tlb_32.c
+++ b/arch/x86/kernel/tlb_32.c
@@ -34,9 +34,8 @@ static DEFINE_SPINLOCK(tlbstate_lock);
*/
void leave_mm(int cpu)
{
- if (per_cpu(cpu_tlbstate, cpu).state == TLBSTATE_OK)
- BUG();
- cpu_clear(cpu, per_cpu(cpu_tlbstate, cpu).active_mm->cpu_vm_mask);
+ BUG_ON(x86_read_percpu(cpu_tlbstate.state) == TLBSTATE_OK);
+ cpu_clear(cpu, x86_read_percpu(cpu_tlbstate.active_mm)->cpu_vm_mask);
load_cr3(swapper_pg_dir);
}
EXPORT_SYMBOL_GPL(leave_mm);
@@ -104,8 +103,8 @@ void smp_invalidate_interrupt(struct pt_regs *regs)
* BUG();
*/
- if (flush_mm == per_cpu(cpu_tlbstate, cpu).active_mm) {
- if (per_cpu(cpu_tlbstate, cpu).state == TLBSTATE_OK) {
+ if (flush_mm == x86_read_percpu(cpu_tlbstate.active_mm)) {
+ if (x86_read_percpu(cpu_tlbstate.state) == TLBSTATE_OK) {
if (flush_va == TLB_FLUSH_ALL)
local_flush_tlb();
else
@@ -119,7 +118,7 @@ void smp_invalidate_interrupt(struct pt_regs *regs)
smp_mb__after_clear_bit();
out:
put_cpu_no_resched();
- __get_cpu_var(irq_stat).irq_tlb_count++;
+ inc_irq_stat(irq_tlb_count);
}
void native_flush_tlb_others(const cpumask_t *cpumaskp, struct mm_struct *mm,
@@ -238,7 +237,7 @@ static void do_flush_tlb_all(void *info)
unsigned long cpu = smp_processor_id();
__flush_tlb_all();
- if (per_cpu(cpu_tlbstate, cpu).state == TLBSTATE_LAZY)
+ if (x86_read_percpu(cpu_tlbstate.state) == TLBSTATE_LAZY)
leave_mm(cpu);
}
diff --git a/arch/x86/kernel/tlb_64.c b/arch/x86/kernel/tlb_64.c
index de6f1bda0c5..f8be6f1d2e4 100644
--- a/arch/x86/kernel/tlb_64.c
+++ b/arch/x86/kernel/tlb_64.c
@@ -154,7 +154,7 @@ asmlinkage void smp_invalidate_interrupt(struct pt_regs *regs)
out:
ack_APIC_irq();
cpu_clear(cpu, f->flush_cpumask);
- add_pda(irq_tlb_count, 1);
+ inc_irq_stat(irq_tlb_count);
}
void native_flush_tlb_others(const cpumask_t *cpumaskp, struct mm_struct *mm,
diff --git a/arch/x86/kernel/tlb_uv.c b/arch/x86/kernel/tlb_uv.c
index 04431f34fd1..6a00e5faaa7 100644
--- a/arch/x86/kernel/tlb_uv.c
+++ b/arch/x86/kernel/tlb_uv.c
@@ -566,14 +566,10 @@ static int __init uv_ptc_init(void)
if (!is_uv_system())
return 0;
- if (!proc_mkdir("sgi_uv", NULL))
- return -EINVAL;
-
proc_uv_ptc = create_proc_entry(UV_PTC_BASENAME, 0444, NULL);
if (!proc_uv_ptc) {
printk(KERN_ERR "unable to create %s proc entry\n",
UV_PTC_BASENAME);
- remove_proc_entry("sgi_uv", NULL);
return -EINVAL;
}
proc_uv_ptc->proc_fops = &proc_uv_ptc_operations;
diff --git a/arch/x86/kernel/trampoline.c b/arch/x86/kernel/trampoline.c
index 1106fac6024..808031a5ba1 100644
--- a/arch/x86/kernel/trampoline.c
+++ b/arch/x86/kernel/trampoline.c
@@ -1,10 +1,26 @@
#include <linux/io.h>
#include <asm/trampoline.h>
+#include <asm/e820.h>
/* ready for x86_64 and x86 */
unsigned char *trampoline_base = __va(TRAMPOLINE_BASE);
+void __init reserve_trampoline_memory(void)
+{
+#ifdef CONFIG_X86_32
+ /*
+ * But first pinch a few for the stack/trampoline stuff
+ * FIXME: Don't need the extra page at 4K, but need to fix
+ * trampoline before removing it. (see the GDT stuff)
+ */
+ reserve_early(PAGE_SIZE, PAGE_SIZE + PAGE_SIZE, "EX TRAMPOLINE");
+#endif
+ /* Has to be in very low memory so we can execute real-mode AP code. */
+ reserve_early(TRAMPOLINE_BASE, TRAMPOLINE_BASE + TRAMPOLINE_SIZE,
+ "TRAMPOLINE");
+}
+
/*
* Currently trivial. Write the real->protected mode
* bootstrap into the page concerned. The caller
@@ -12,7 +28,6 @@ unsigned char *trampoline_base = __va(TRAMPOLINE_BASE);
*/
unsigned long setup_trampoline(void)
{
- memcpy(trampoline_base, trampoline_data,
- trampoline_end - trampoline_data);
+ memcpy(trampoline_base, trampoline_data, TRAMPOLINE_SIZE);
return virt_to_phys(trampoline_base);
}
diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
index 4a6dff39a47..2d1f4c7e405 100644
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -481,11 +481,7 @@ do_nmi(struct pt_regs *regs, long error_code)
{
nmi_enter();
-#ifdef CONFIG_X86_32
- { int cpu; cpu = smp_processor_id(); ++nmi_count(cpu); }
-#else
- add_pda(__nmi_count, 1);
-#endif
+ inc_irq_stat(__nmi_count);
if (!ignore_nmis)
default_do_nmi(regs);
@@ -664,7 +660,7 @@ void math_error(void __user *ip)
{
struct task_struct *task;
siginfo_t info;
- unsigned short cwd, swd;
+ unsigned short cwd, swd, err;
/*
* Save the info for the exception handler and clear the error.
@@ -675,7 +671,6 @@ void math_error(void __user *ip)
task->thread.error_code = 0;
info.si_signo = SIGFPE;
info.si_errno = 0;
- info.si_code = __SI_FAULT;
info.si_addr = ip;
/*
* (~cwd & swd) will mask out exceptions that are not set to unmasked
@@ -689,34 +684,31 @@ void math_error(void __user *ip)
*/
cwd = get_fpu_cwd(task);
swd = get_fpu_swd(task);
- switch (swd & ~cwd & 0x3f) {
- case 0x000: /* No unmasked exception */
+
+ err = swd & ~cwd & 0x3f;
+
#ifdef CONFIG_X86_32
+ if (!err)
return;
#endif
- default: /* Multiple exceptions */
- break;
- case 0x001: /* Invalid Op */
+
+ if (err & 0x001) { /* Invalid op */
/*
* swd & 0x240 == 0x040: Stack Underflow
* swd & 0x240 == 0x240: Stack Overflow
* User must clear the SF bit (0x40) if set
*/
info.si_code = FPE_FLTINV;
- break;
- case 0x002: /* Denormalize */
- case 0x010: /* Underflow */
- info.si_code = FPE_FLTUND;
- break;
- case 0x004: /* Zero Divide */
+ } else if (err & 0x004) { /* Divide by Zero */
info.si_code = FPE_FLTDIV;
- break;
- case 0x008: /* Overflow */
+ } else if (err & 0x008) { /* Overflow */
info.si_code = FPE_FLTOVF;
- break;
- case 0x020: /* Precision */
+ } else if (err & 0x012) { /* Denormal, Underflow */
+ info.si_code = FPE_FLTUND;
+ } else if (err & 0x020) { /* Precision */
info.si_code = FPE_FLTRES;
- break;
+ } else {
+ info.si_code = __SI_FAULT|SI_KERNEL; /* WTF? */
}
force_sig_info(SIGFPE, &info, task);
}
diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c
index 424093b157d..599e5816863 100644
--- a/arch/x86/kernel/tsc.c
+++ b/arch/x86/kernel/tsc.c
@@ -15,6 +15,7 @@
#include <asm/vgtod.h>
#include <asm/time.h>
#include <asm/delay.h>
+#include <asm/hypervisor.h>
unsigned int cpu_khz; /* TSC clocks / usec, not used here */
EXPORT_SYMBOL(cpu_khz);
@@ -31,6 +32,7 @@ static int tsc_unstable;
erroneous rdtsc usage on !cpu_has_tsc processors */
static int tsc_disabled = -1;
+static int tsc_clocksource_reliable;
/*
* Scheduler clock - returns current time in nanosec units.
*/
@@ -98,6 +100,15 @@ int __init notsc_setup(char *str)
__setup("notsc", notsc_setup);
+static int __init tsc_setup(char *str)
+{
+ if (!strcmp(str, "reliable"))
+ tsc_clocksource_reliable = 1;
+ return 1;
+}
+
+__setup("tsc=", tsc_setup);
+
#define MAX_RETRIES 5
#define SMI_TRESHOLD 50000
@@ -352,9 +363,15 @@ unsigned long native_calibrate_tsc(void)
{
u64 tsc1, tsc2, delta, ref1, ref2;
unsigned long tsc_pit_min = ULONG_MAX, tsc_ref_min = ULONG_MAX;
- unsigned long flags, latch, ms, fast_calibrate;
+ unsigned long flags, latch, ms, fast_calibrate, tsc_khz;
int hpet = is_hpet_enabled(), i, loopmin;
+ tsc_khz = get_hypervisor_tsc_freq();
+ if (tsc_khz) {
+ printk(KERN_INFO "TSC: Frequency read from the hypervisor\n");
+ return tsc_khz;
+ }
+
local_irq_save(flags);
fast_calibrate = quick_pit_calibrate();
local_irq_restore(flags);
@@ -731,24 +748,21 @@ static struct dmi_system_id __initdata bad_tsc_dmi_table[] = {
{}
};
-/*
- * Geode_LX - the OLPC CPU has a possibly a very reliable TSC
- */
+static void __init check_system_tsc_reliable(void)
+{
#ifdef CONFIG_MGEODE_LX
-/* RTSC counts during suspend */
+ /* RTSC counts during suspend */
#define RTSC_SUSP 0x100
-
-static void __init check_geode_tsc_reliable(void)
-{
unsigned long res_low, res_high;
rdmsr_safe(MSR_GEODE_BUSCONT_CONF0, &res_low, &res_high);
+ /* Geode_LX - the OLPC CPU has a possibly a very reliable TSC */
if (res_low & RTSC_SUSP)
- clocksource_tsc.flags &= ~CLOCK_SOURCE_MUST_VERIFY;
-}
-#else
-static inline void check_geode_tsc_reliable(void) { }
+ tsc_clocksource_reliable = 1;
#endif
+ if (boot_cpu_has(X86_FEATURE_TSC_RELIABLE))
+ tsc_clocksource_reliable = 1;
+}
/*
* Make an educated guess if the TSC is trustworthy and synchronized
@@ -783,6 +797,8 @@ static void __init init_tsc_clocksource(void)
{
clocksource_tsc.mult = clocksource_khz2mult(tsc_khz,
clocksource_tsc.shift);
+ if (tsc_clocksource_reliable)
+ clocksource_tsc.flags &= ~CLOCK_SOURCE_MUST_VERIFY;
/* lower the rating if we already know its unstable: */
if (check_tsc_unstable()) {
clocksource_tsc.rating = 0;
@@ -843,7 +859,7 @@ void __init tsc_init(void)
if (unsynchronized_tsc())
mark_tsc_unstable("TSCs unsynchronized");
- check_geode_tsc_reliable();
+ check_system_tsc_reliable();
init_tsc_clocksource();
}
diff --git a/arch/x86/kernel/tsc_sync.c b/arch/x86/kernel/tsc_sync.c
index 1c0dfbca87c..bf36328f6ef 100644
--- a/arch/x86/kernel/tsc_sync.c
+++ b/arch/x86/kernel/tsc_sync.c
@@ -112,6 +112,12 @@ void __cpuinit check_tsc_sync_source(int cpu)
if (unsynchronized_tsc())
return;
+ if (boot_cpu_has(X86_FEATURE_TSC_RELIABLE)) {
+ printk(KERN_INFO
+ "Skipping synchronization checks as TSC is reliable.\n");
+ return;
+ }
+
printk(KERN_INFO "checking TSC synchronization [CPU#%d -> CPU#%d]:",
smp_processor_id(), cpu);
@@ -165,7 +171,7 @@ void __cpuinit check_tsc_sync_target(void)
{
int cpus = 2;
- if (unsynchronized_tsc())
+ if (unsynchronized_tsc() || boot_cpu_has(X86_FEATURE_TSC_RELIABLE))
return;
/*
diff --git a/arch/x86/kernel/vmi_32.c b/arch/x86/kernel/vmi_32.c
index 22fd6577156..23206ba1687 100644
--- a/arch/x86/kernel/vmi_32.c
+++ b/arch/x86/kernel/vmi_32.c
@@ -266,109 +266,6 @@ static void vmi_nop(void)
{
}
-#ifdef CONFIG_DEBUG_PAGE_TYPE
-
-#ifdef CONFIG_X86_PAE
-#define MAX_BOOT_PTS (2048+4+1)
-#else
-#define MAX_BOOT_PTS (1024+1)
-#endif
-
-/*
- * During boot, mem_map is not yet available in paging_init, so stash
- * all the boot page allocations here.
- */
-static struct {
- u32 pfn;
- int type;
-} boot_page_allocations[MAX_BOOT_PTS];
-static int num_boot_page_allocations;
-static int boot_allocations_applied;
-
-void vmi_apply_boot_page_allocations(void)
-{
- int i;
- BUG_ON(!mem_map);
- for (i = 0; i < num_boot_page_allocations; i++) {
- struct page *page = pfn_to_page(boot_page_allocations[i].pfn);
- page->type = boot_page_allocations[i].type;
- page->type = boot_page_allocations[i].type &
- ~(VMI_PAGE_ZEROED | VMI_PAGE_CLONE);
- }
- boot_allocations_applied = 1;
-}
-
-static void record_page_type(u32 pfn, int type)
-{
- BUG_ON(num_boot_page_allocations >= MAX_BOOT_PTS);
- boot_page_allocations[num_boot_page_allocations].pfn = pfn;
- boot_page_allocations[num_boot_page_allocations].type = type;
- num_boot_page_allocations++;
-}
-
-static void check_zeroed_page(u32 pfn, int type, struct page *page)
-{
- u32 *ptr;
- int i;
- int limit = PAGE_SIZE / sizeof(int);
-
- if (page_address(page))
- ptr = (u32 *)page_address(page);
- else
- ptr = (u32 *)__va(pfn << PAGE_SHIFT);
- /*
- * When cloning the root in non-PAE mode, only the userspace
- * pdes need to be zeroed.
- */
- if (type & VMI_PAGE_CLONE)
- limit = KERNEL_PGD_BOUNDARY;
- for (i = 0; i < limit; i++)
- BUG_ON(ptr[i]);
-}
-
-/*
- * We stash the page type into struct page so we can verify the page
- * types are used properly.
- */
-static void vmi_set_page_type(u32 pfn, int type)
-{
- /* PAE can have multiple roots per page - don't track */
- if (PTRS_PER_PMD > 1 && (type & VMI_PAGE_PDP))
- return;
-
- if (boot_allocations_applied) {
- struct page *page = pfn_to_page(pfn);
- if (type != VMI_PAGE_NORMAL)
- BUG_ON(page->type);
- else
- BUG_ON(page->type == VMI_PAGE_NORMAL);
- page->type = type & ~(VMI_PAGE_ZEROED | VMI_PAGE_CLONE);
- if (type & VMI_PAGE_ZEROED)
- check_zeroed_page(pfn, type, page);
- } else {
- record_page_type(pfn, type);
- }
-}
-
-static void vmi_check_page_type(u32 pfn, int type)
-{
- /* PAE can have multiple roots per page - skip checks */
- if (PTRS_PER_PMD > 1 && (type & VMI_PAGE_PDP))
- return;
-
- type &= ~(VMI_PAGE_ZEROED | VMI_PAGE_CLONE);
- if (boot_allocations_applied) {
- struct page *page = pfn_to_page(pfn);
- BUG_ON((page->type ^ type) & VMI_PAGE_PAE);
- BUG_ON(type == VMI_PAGE_NORMAL && page->type);
- BUG_ON((type & page->type) == 0);
- }
-}
-#else
-#define vmi_set_page_type(p,t) do { } while (0)
-#define vmi_check_page_type(p,t) do { } while (0)
-#endif
-
#ifdef CONFIG_HIGHPTE
static void *vmi_kmap_atomic_pte(struct page *page, enum km_type type)
{
@@ -395,7 +292,6 @@ static void *vmi_kmap_atomic_pte(struct page *page, enum km_type type)
static void vmi_allocate_pte(struct mm_struct *mm, unsigned long pfn)
{
- vmi_set_page_type(pfn, VMI_PAGE_L1);
vmi_ops.allocate_page(pfn, VMI_PAGE_L1, 0, 0, 0);
}
@@ -406,27 +302,22 @@ static void vmi_allocate_pmd(struct mm_struct *mm, unsigned long pfn)
* It is called only for swapper_pg_dir, which already has
* data on it.
*/
- vmi_set_page_type(pfn, VMI_PAGE_L2);
vmi_ops.allocate_page(pfn, VMI_PAGE_L2, 0, 0, 0);
}
static void vmi_allocate_pmd_clone(unsigned long pfn, unsigned long clonepfn, unsigned long start, unsigned long count)
{
- vmi_set_page_type(pfn, VMI_PAGE_L2 | VMI_PAGE_CLONE);
- vmi_check_page_type(clonepfn, VMI_PAGE_L2);
vmi_ops.allocate_page(pfn, VMI_PAGE_L2 | VMI_PAGE_CLONE, clonepfn, start, count);
}
static void vmi_release_pte(unsigned long pfn)
{
vmi_ops.release_page(pfn, VMI_PAGE_L1);
- vmi_set_page_type(pfn, VMI_PAGE_NORMAL);
}
static void vmi_release_pmd(unsigned long pfn)
{
vmi_ops.release_page(pfn, VMI_PAGE_L2);
- vmi_set_page_type(pfn, VMI_PAGE_NORMAL);
}
/*
@@ -450,26 +341,22 @@ static void vmi_release_pmd(unsigned long pfn)
static void vmi_update_pte(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
{
- vmi_check_page_type(__pa(ptep) >> PAGE_SHIFT, VMI_PAGE_PTE);
vmi_ops.update_pte(ptep, vmi_flags_addr(mm, addr, VMI_PAGE_PT, 0));
}
static void vmi_update_pte_defer(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
{
- vmi_check_page_type(__pa(ptep) >> PAGE_SHIFT, VMI_PAGE_PTE);
vmi_ops.update_pte(ptep, vmi_flags_addr_defer(mm, addr, VMI_PAGE_PT, 0));
}
static void vmi_set_pte(pte_t *ptep, pte_t pte)
{
/* XXX because of set_pmd_pte, this can be called on PT or PD layers */
- vmi_check_page_type(__pa(ptep) >> PAGE_SHIFT, VMI_PAGE_PTE | VMI_PAGE_PD);
vmi_ops.set_pte(pte, ptep, VMI_PAGE_PT);
}
static void vmi_set_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte)
{
- vmi_check_page_type(__pa(ptep) >> PAGE_SHIFT, VMI_PAGE_PTE);
vmi_ops.set_pte(pte, ptep, vmi_flags_addr(mm, addr, VMI_PAGE_PT, 0));
}
@@ -477,10 +364,8 @@ static void vmi_set_pmd(pmd_t *pmdp, pmd_t pmdval)
{
#ifdef CONFIG_X86_PAE
const pte_t pte = { .pte = pmdval.pmd };
- vmi_check_page_type(__pa(pmdp) >> PAGE_SHIFT, VMI_PAGE_PMD);
#else
const pte_t pte = { pmdval.pud.pgd.pgd };
- vmi_check_page_type(__pa(pmdp) >> PAGE_SHIFT, VMI_PAGE_PGD);
#endif
vmi_ops.set_pte(pte, (pte_t *)pmdp, VMI_PAGE_PD);
}
@@ -502,7 +387,6 @@ static void vmi_set_pte_atomic(pte_t *ptep, pte_t pteval)
static void vmi_set_pte_present(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte)
{
- vmi_check_page_type(__pa(ptep) >> PAGE_SHIFT, VMI_PAGE_PTE);
vmi_ops.set_pte(pte, ptep, vmi_flags_addr_defer(mm, addr, VMI_PAGE_PT, 1));
}
@@ -510,21 +394,18 @@ static void vmi_set_pud(pud_t *pudp, pud_t pudval)
{
/* Um, eww */
const pte_t pte = { .pte = pudval.pgd.pgd };
- vmi_check_page_type(__pa(pudp) >> PAGE_SHIFT, VMI_PAGE_PGD);
vmi_ops.set_pte(pte, (pte_t *)pudp, VMI_PAGE_PDP);
}
static void vmi_pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
{
const pte_t pte = { .pte = 0 };
- vmi_check_page_type(__pa(ptep) >> PAGE_SHIFT, VMI_PAGE_PTE);
vmi_ops.set_pte(pte, ptep, vmi_flags_addr(mm, addr, VMI_PAGE_PT, 0));
}
static void vmi_pmd_clear(pmd_t *pmd)
{
const pte_t pte = { .pte = 0 };
- vmi_check_page_type(__pa(pmd) >> PAGE_SHIFT, VMI_PAGE_PMD);
vmi_ops.set_pte(pte, (pte_t *)pmd, VMI_PAGE_PD);
}
#endif
diff --git a/arch/x86/kernel/vmlinux_32.lds.S b/arch/x86/kernel/vmlinux_32.lds.S
index a9b8560adbc..82c67559dde 100644
--- a/arch/x86/kernel/vmlinux_32.lds.S
+++ b/arch/x86/kernel/vmlinux_32.lds.S
@@ -44,6 +44,7 @@ SECTIONS
SCHED_TEXT
LOCK_TEXT
KPROBES_TEXT
+ IRQENTRY_TEXT
*(.fixup)
*(.gnu.warning)
_etext = .; /* End of text section */
diff --git a/arch/x86/kernel/vmlinux_64.lds.S b/arch/x86/kernel/vmlinux_64.lds.S
index 46e05447405..1a614c0e6be 100644
--- a/arch/x86/kernel/vmlinux_64.lds.S
+++ b/arch/x86/kernel/vmlinux_64.lds.S
@@ -35,6 +35,7 @@ SECTIONS
SCHED_TEXT
LOCK_TEXT
KPROBES_TEXT
+ IRQENTRY_TEXT
*(.fixup)
*(.gnu.warning)
_etext = .; /* End of text section */
diff --git a/arch/x86/kernel/vsyscall_64.c b/arch/x86/kernel/vsyscall_64.c
index 6f3d3d4cd97..44153afc906 100644
--- a/arch/x86/kernel/vsyscall_64.c
+++ b/arch/x86/kernel/vsyscall_64.c
@@ -131,7 +131,16 @@ static __always_inline void do_vgettimeofday(struct timeval * tv)
gettimeofday(tv,NULL);
return;
}
+
+ /*
+ * Surround the RDTSC by barriers, to make sure it's not
+ * speculated to outside the seqlock critical section and
+ * does not cause time warps:
+ */
+ rdtsc_barrier();
now = vread();
+ rdtsc_barrier();
+
base = __vsyscall_gtod_data.clock.cycle_last;
mask = __vsyscall_gtod_data.clock.mask;
mult = __vsyscall_gtod_data.clock.mult;