24 files changed, 496 insertions, 252 deletions

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index dcb0593b4a66..6f77afa6bca9 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -55,6 +55,7 @@ config X86
         select HAVE_HW_BREAKPOINT
         select HAVE_MIXED_BREAKPOINTS_REGS
         select PERF_EVENTS
+        select HAVE_PERF_EVENTS_NMI
         select ANON_INODES
         select HAVE_ARCH_KMEMCHECK
         select HAVE_USER_RETURN_NOTIFIER
diff --git a/arch/x86/include/asm/hw_breakpoint.h b/arch/x86/include/asm/hw_breakpoint.h
index 942255310e6a..528a11e8d3e3 100644
--- a/arch/x86/include/asm/hw_breakpoint.h
+++ b/arch/x86/include/asm/hw_breakpoint.h
@@ -20,10 +20,10 @@ struct arch_hw_breakpoint {
 #include <linux/list.h>
 
 /* Available HW breakpoint length encodings */
+#define X86_BREAKPOINT_LEN_X            0x00
 #define X86_BREAKPOINT_LEN_1            0x40
 #define X86_BREAKPOINT_LEN_2            0x44
 #define X86_BREAKPOINT_LEN_4            0x4c
-#define X86_BREAKPOINT_LEN_EXECUTE      0x40
 
 #ifdef CONFIG_X86_64
 #define X86_BREAKPOINT_LEN_8            0x48
diff --git a/arch/x86/include/asm/local64.h b/arch/x86/include/asm/local64.h
new file mode 100644
index 000000000000..36c93b5cc239
--- /dev/null
+++ b/arch/x86/include/asm/local64.h
@@ -0,0 +1 @@
+#include <asm-generic/local64.h>
diff --git a/arch/x86/include/asm/nmi.h b/arch/x86/include/asm/nmi.h
index 93da9c3f3341..932f0f86b4b7 100644
--- a/arch/x86/include/asm/nmi.h
+++ b/arch/x86/include/asm/nmi.h
@@ -17,7 +17,9 @@ int do_nmi_callback(struct pt_regs *regs, int cpu);
 
 extern void die_nmi(char *str, struct pt_regs *regs, int do_panic);
 extern int check_nmi_watchdog(void);
+#if !defined(CONFIG_LOCKUP_DETECTOR)
 extern int nmi_watchdog_enabled;
+#endif
 extern int avail_to_resrv_perfctr_nmi_bit(unsigned int);
 extern int reserve_perfctr_nmi(unsigned int);
 extern void release_perfctr_nmi(unsigned int);
diff --git a/arch/x86/include/asm/perf_event.h b/arch/x86/include/asm/perf_event.h
index 254883d0c7e0..6e742cc4251b 100644
--- a/arch/x86/include/asm/perf_event.h
+++ b/arch/x86/include/asm/perf_event.h
@@ -68,8 +68,9 @@ union cpuid10_eax {
 
 union cpuid10_edx {
         struct {
-                unsigned int num_counters_fixed:4;
-                unsigned int reserved:28;
+                unsigned int num_counters_fixed:5;
+                unsigned int bit_width_fixed:8;
+                unsigned int reserved:19;
         } split;
         unsigned int full;
 };
@@ -140,6 +141,19 @@ extern unsigned long perf_instruction_pointer(struct pt_regs *regs);
 extern unsigned long perf_misc_flags(struct pt_regs *regs);
 #define perf_misc_flags(regs)   perf_misc_flags(regs)
 
+#include <asm/stacktrace.h>
+
+/*
+ * We abuse bit 3 from flags to pass exact information, see perf_misc_flags
+ * and the comment with PERF_EFLAGS_EXACT.
+ */
+#define perf_arch_fetch_caller_regs(regs, __ip)         {       \
+        (regs)->ip = (__ip);                                    \
+        (regs)->bp = caller_frame_pointer();                    \
+        (regs)->cs = __KERNEL_CS;                               \
+        regs->flags = 0;                                        \
+}
+
 #else
 static inline void init_hw_perf_events(void)            { }
 static inline void perf_events_lapic_init(void) { }
diff --git a/arch/x86/include/asm/perf_event_p4.h b/arch/x86/include/asm/perf_event_p4.h
index 64a8ebff06fc..def500776b16 100644
--- a/arch/x86/include/asm/perf_event_p4.h
+++ b/arch/x86/include/asm/perf_event_p4.h
@@ -19,7 +19,6 @@
 #define ARCH_P4_RESERVED_ESCR   (2) /* IQ_ESCR(0,1) not always present */
 #define ARCH_P4_MAX_ESCR        (ARCH_P4_TOTAL_ESCR - ARCH_P4_RESERVED_ESCR)
 #define ARCH_P4_MAX_CCCR        (18)
-#define ARCH_P4_MAX_COUNTER     (ARCH_P4_MAX_CCCR / 2)
 
 #define P4_ESCR_EVENT_MASK      0x7e000000U
 #define P4_ESCR_EVENT_SHIFT     25
@@ -71,10 +70,6 @@
 #define P4_CCCR_THRESHOLD(v)            ((v) << P4_CCCR_THRESHOLD_SHIFT)
 #define P4_CCCR_ESEL(v)                 ((v) << P4_CCCR_ESCR_SELECT_SHIFT)
 
-/* Custom bits in reerved CCCR area */
-#define P4_CCCR_CACHE_OPS_MASK          0x0000003fU
-
-
 /* Non HT mask */
 #define P4_CCCR_MASK                            \
         (P4_CCCR_OVF                    |       \
@@ -106,8 +101,7 @@
  * ESCR and CCCR but rather an only packed value should
  * be unpacked and written to a proper addresses
  *
- * the base idea is to pack as much info as
- * possible
+ * the base idea is to pack as much info as possible
  */
 #define p4_config_pack_escr(v)          (((u64)(v)) << 32)
 #define p4_config_pack_cccr(v)          (((u64)(v)) & 0xffffffffULL)
@@ -130,8 +124,6 @@
                 t;                                      \
         })
 
-#define p4_config_unpack_cache_event(v) (((u64)(v)) & P4_CCCR_CACHE_OPS_MASK)
-
 #define P4_CONFIG_HT_SHIFT              63
 #define P4_CONFIG_HT                    (1ULL << P4_CONFIG_HT_SHIFT)
 
@@ -214,6 +206,12 @@ static inline u32 p4_default_escr_conf(int cpu, int exclude_os, int exclude_usr)
         return escr;
 }
 
+/*
+ * This are the events which should be used in "Event Select"
+ * field of ESCR register, they are like unique keys which allow
+ * the kernel to determinate which CCCR and COUNTER should be
+ * used to track an event
+ */
 enum P4_EVENTS {
         P4_EVENT_TC_DELIVER_MODE,
         P4_EVENT_BPU_FETCH_REQUEST,
@@ -561,7 +559,7 @@ enum P4_EVENT_OPCODES {
  * a caller should use P4_ESCR_EMASK_NAME helper to
  * pick the EventMask needed, for example
  *
- *      P4_ESCR_EMASK_NAME(P4_EVENT_TC_DELIVER_MODE, DD)
+ *      P4_ESCR_EMASK_BIT(P4_EVENT_TC_DELIVER_MODE, DD)
  */
 enum P4_ESCR_EMASKS {
         P4_GEN_ESCR_EMASK(P4_EVENT_TC_DELIVER_MODE, DD, 0),
@@ -753,43 +751,50 @@ enum P4_ESCR_EMASKS {
         P4_GEN_ESCR_EMASK(P4_EVENT_INSTR_COMPLETED, BOGUS, 1),
 };
 
-/* P4 PEBS: stale for a while */
-#define P4_PEBS_METRIC_MASK     0x00001fffU
-#define P4_PEBS_UOB_TAG         0x01000000U
-#define P4_PEBS_ENABLE          0x02000000U
-
-/* Replay metrics for MSR_IA32_PEBS_ENABLE and MSR_P4_PEBS_MATRIX_VERT */
-#define P4_PEBS__1stl_cache_load_miss_retired   0x3000001
-#define P4_PEBS__2ndl_cache_load_miss_retired   0x3000002
-#define P4_PEBS__dtlb_load_miss_retired         0x3000004
-#define P4_PEBS__dtlb_store_miss_retired        0x3000004
-#define P4_PEBS__dtlb_all_miss_retired          0x3000004
-#define P4_PEBS__tagged_mispred_branch          0x3018000
-#define P4_PEBS__mob_load_replay_retired        0x3000200
-#define P4_PEBS__split_load_retired             0x3000400
-#define P4_PEBS__split_store_retired            0x3000400
-
-#define P4_VERT__1stl_cache_load_miss_retired   0x0000001
-#define P4_VERT__2ndl_cache_load_miss_retired   0x0000001
-#define P4_VERT__dtlb_load_miss_retired         0x0000001
-#define P4_VERT__dtlb_store_miss_retired        0x0000002
-#define P4_VERT__dtlb_all_miss_retired          0x0000003
-#define P4_VERT__tagged_mispred_branch          0x0000010
-#define P4_VERT__mob_load_replay_retired        0x0000001
-#define P4_VERT__split_load_retired             0x0000001
-#define P4_VERT__split_store_retired            0x0000002
-
-enum P4_CACHE_EVENTS {
-        P4_CACHE__NONE,
-
-        P4_CACHE__1stl_cache_load_miss_retired,
-        P4_CACHE__2ndl_cache_load_miss_retired,
-        P4_CACHE__dtlb_load_miss_retired,
-        P4_CACHE__dtlb_store_miss_retired,
-        P4_CACHE__itlb_reference_hit,
-        P4_CACHE__itlb_reference_miss,
-
-        P4_CACHE__MAX
+/*
+ * P4 PEBS specifics (Replay Event only)
+ *
+ * Format (bits):
+ *   0-6: metric from P4_PEBS_METRIC enum
+ *    7 : reserved
+ *    8 : reserved
+ * 9-11 : reserved
+ *
+ * Note we have UOP and PEBS bits reserved for now
+ * just in case if we will need them once
+ */
+#define P4_PEBS_CONFIG_ENABLE           (1 << 7)
+#define P4_PEBS_CONFIG_UOP_TAG          (1 << 8)
+#define P4_PEBS_CONFIG_METRIC_MASK      0x3f
+#define P4_PEBS_CONFIG_MASK             0xff
+
+/*
+ * mem: Only counters MSR_IQ_COUNTER4 (16) and
+ * MSR_IQ_COUNTER5 (17) are allowed for PEBS sampling
+ */
+#define P4_PEBS_ENABLE                  0x02000000U
+#define P4_PEBS_ENABLE_UOP_TAG          0x01000000U
+
+#define p4_config_unpack_metric(v)      (((u64)(v)) & P4_PEBS_CONFIG_METRIC_MASK)
+#define p4_config_unpack_pebs(v)        (((u64)(v)) & P4_PEBS_CONFIG_MASK)
+
+#define p4_config_pebs_has(v, mask)     (p4_config_unpack_pebs(v) & (mask))
+
+enum P4_PEBS_METRIC {
+        P4_PEBS_METRIC__none,
+
+        P4_PEBS_METRIC__1stl_cache_load_miss_retired,
+        P4_PEBS_METRIC__2ndl_cache_load_miss_retired,
+        P4_PEBS_METRIC__dtlb_load_miss_retired,
+        P4_PEBS_METRIC__dtlb_store_miss_retired,
+        P4_PEBS_METRIC__dtlb_all_miss_retired,
+        P4_PEBS_METRIC__tagged_mispred_branch,
+        P4_PEBS_METRIC__mob_load_replay_retired,
+        P4_PEBS_METRIC__split_load_retired,
+        P4_PEBS_METRIC__split_store_retired,
+
+        P4_PEBS_METRIC__max
 };
 
 #endif /* PERF_EVENT_P4_H */
+
diff --git a/arch/x86/include/asm/stacktrace.h b/arch/x86/include/asm/stacktrace.h
index 4dab78edbad9..2b16a2ad23dc 100644
--- a/arch/x86/include/asm/stacktrace.h
+++ b/arch/x86/include/asm/stacktrace.h
@@ -1,6 +1,13 @@
+/*
+ *  Copyright (C) 1991, 1992  Linus Torvalds
+ *  Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
+ */
+
 #ifndef _ASM_X86_STACKTRACE_H
 #define _ASM_X86_STACKTRACE_H
 
+#include <linux/uaccess.h>
+
 extern int kstack_depth_to_print;
 
 struct thread_info;
@@ -42,4 +49,46 @@ void dump_trace(struct task_struct *tsk, struct pt_regs *regs,
                 unsigned long *stack, unsigned long bp,
                 const struct stacktrace_ops *ops, void *data);
 
+#ifdef CONFIG_X86_32
+#define STACKSLOTS_PER_LINE 8
+#define get_bp(bp) asm("movl %%ebp, %0" : "=r" (bp) :)
+#else
+#define STACKSLOTS_PER_LINE 4
+#define get_bp(bp) asm("movq %%rbp, %0" : "=r" (bp) :)
+#endif
+
+extern void
+show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
+                unsigned long *stack, unsigned long bp, char *log_lvl);
+
+extern void
+show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
+                unsigned long *sp, unsigned long bp, char *log_lvl);
+
+extern unsigned int code_bytes;
+
+/* The form of the top of the frame on the stack */
+struct stack_frame {
+        struct stack_frame *next_frame;
+        unsigned long return_address;
+};
+
+struct stack_frame_ia32 {
+    u32 next_frame;
+    u32 return_address;
+};
+
+static inline unsigned long caller_frame_pointer(void)
+{
+        struct stack_frame *frame;
+
+        get_bp(frame);
+
+#ifdef CONFIG_FRAME_POINTER
+        frame = frame->next_frame;
+#endif
+
+        return (unsigned long)frame;
+}
+
 #endif /* _ASM_X86_STACKTRACE_H */
diff --git a/arch/x86/kernel/apic/Makefile b/arch/x86/kernel/apic/Makefile
index 565c1bfc507d..910f20b457c4 100644
--- a/arch/x86/kernel/apic/Makefile
+++ b/arch/x86/kernel/apic/Makefile
@@ -2,7 +2,12 @@
 # Makefile for local APIC drivers and for the IO-APIC code
 #
 
-obj-$(CONFIG_X86_LOCAL_APIC)    += apic.o apic_noop.o probe_$(BITS).o ipi.o nmi.o
+obj-$(CONFIG_X86_LOCAL_APIC)    += apic.o apic_noop.o probe_$(BITS).o ipi.o
+ifneq ($(CONFIG_HARDLOCKUP_DETECTOR),y)
+obj-$(CONFIG_X86_LOCAL_APIC)    += nmi.o
+endif
+obj-$(CONFIG_HARDLOCKUP_DETECTOR)       += hw_nmi.o
+
 obj-$(CONFIG_X86_IO_APIC)       += io_apic.o
 obj-$(CONFIG_SMP)               += ipi.o
 
diff --git a/arch/x86/kernel/apic/hw_nmi.c b/arch/x86/kernel/apic/hw_nmi.c
new file mode 100644
index 000000000000..cefd6942f0e9
--- /dev/null
+++ b/arch/x86/kernel/apic/hw_nmi.c
@@ -0,0 +1,107 @@
+/*
+ *  HW NMI watchdog support
+ *
+ *  started by Don Zickus, Copyright (C) 2010 Red Hat, Inc.
+ *
+ *  Arch specific calls to support NMI watchdog
+ *
+ *  Bits copied from original nmi.c file
+ *
+ */
+#include <asm/apic.h>
+
+#include <linux/cpumask.h>
+#include <linux/kdebug.h>
+#include <linux/notifier.h>
+#include <linux/kprobes.h>
+#include <linux/nmi.h>
+#include <linux/module.h>
+
+/* For reliability, we're prepared to waste bits here. */
+static DECLARE_BITMAP(backtrace_mask, NR_CPUS) __read_mostly;
+
+u64 hw_nmi_get_sample_period(void)
+{
+        return (u64)(cpu_khz) * 1000 * 60;
+}
+
+#ifdef ARCH_HAS_NMI_WATCHDOG
+void arch_trigger_all_cpu_backtrace(void)
+{
+        int i;
+
+        cpumask_copy(to_cpumask(backtrace_mask), cpu_online_mask);
+
+        printk(KERN_INFO "sending NMI to all CPUs:\n");
+        apic->send_IPI_all(NMI_VECTOR);
+
+        /* Wait for up to 10 seconds for all CPUs to do the backtrace */
+        for (i = 0; i < 10 * 1000; i++) {
+                if (cpumask_empty(to_cpumask(backtrace_mask)))
+                        break;
+                mdelay(1);
+        }
+}
+
+static int __kprobes
+arch_trigger_all_cpu_backtrace_handler(struct notifier_block *self,
+                         unsigned long cmd, void *__args)
+{
+        struct die_args *args = __args;
+        struct pt_regs *regs;
+        int cpu = smp_processor_id();
+
+        switch (cmd) {
+        case DIE_NMI:
+        case DIE_NMI_IPI:
+                break;
+
+        default:
+                return NOTIFY_DONE;
+        }
+
+        regs = args->regs;
+
+        if (cpumask_test_cpu(cpu, to_cpumask(backtrace_mask))) {
+                static arch_spinlock_t lock = __ARCH_SPIN_LOCK_UNLOCKED;
+
+                arch_spin_lock(&lock);
+                printk(KERN_WARNING "NMI backtrace for cpu %d\n", cpu);
+                show_regs(regs);
+                dump_stack();
+                arch_spin_unlock(&lock);
+                cpumask_clear_cpu(cpu, to_cpumask(backtrace_mask));
+                return NOTIFY_STOP;
+        }
+
+        return NOTIFY_DONE;
+}
+
+static __read_mostly struct notifier_block backtrace_notifier = {
+        .notifier_call          = arch_trigger_all_cpu_backtrace_handler,
+        .next                   = NULL,
+        .priority               = 1
+};
+
+static int __init register_trigger_all_cpu_backtrace(void)
+{
+        register_die_notifier(&backtrace_notifier);
+        return 0;
+}
+early_initcall(register_trigger_all_cpu_backtrace);
+#endif
+
+/* STUB calls to mimic old nmi_watchdog behaviour */
+#if defined(CONFIG_X86_LOCAL_APIC)
+unsigned int nmi_watchdog = NMI_NONE;
+EXPORT_SYMBOL(nmi_watchdog);
+void acpi_nmi_enable(void) { return; }
+void acpi_nmi_disable(void) { return; }
+#endif
+atomic_t nmi_active = ATOMIC_INIT(0);           /* oprofile uses this */
+EXPORT_SYMBOL(nmi_active);
+int unknown_nmi_panic;
+void cpu_nmi_set_wd_enabled(void) { return; }
+void stop_apic_nmi_watchdog(void *unused) { return; }
+void setup_apic_nmi_watchdog(void *unused) { return; }
+int __init check_nmi_watchdog(void) { return 0; }
diff --git a/arch/x86/kernel/apic/nmi.c b/arch/x86/kernel/apic/nmi.c
index 1edaf15c0b8e..a43f71cb30f8 100644
--- a/arch/x86/kernel/apic/nmi.c
+++ b/arch/x86/kernel/apic/nmi.c
@@ -401,13 +401,6 @@ nmi_watchdog_tick(struct pt_regs *regs, unsigned reason)
         int cpu = smp_processor_id();
         int rc = 0;
 
-        /* check for other users first */
-        if (notify_die(DIE_NMI, "nmi", regs, reason, 2, SIGINT)
-                        == NOTIFY_STOP) {
-                rc = 1;
-                touched = 1;
-        }
-
         sum = get_timer_irqs(cpu);
 
         if (__get_cpu_var(nmi_touch)) {
diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
index 5db5b7d65a18..f2da20fda02d 100644
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -220,6 +220,7 @@ struct x86_pmu {
                                                  struct perf_event *event);
         struct event_constraint *event_constraints;
         void            (*quirks)(void);
+        int             perfctr_second_write;
 
         int             (*cpu_prepare)(int cpu);
         void            (*cpu_starting)(int cpu);
@@ -295,10 +296,10 @@ x86_perf_event_update(struct perf_event *event)
          * count to the generic event atomically:
          */
 again:
-        prev_raw_count = atomic64_read(&hwc->prev_count);
+        prev_raw_count = local64_read(&hwc->prev_count);
         rdmsrl(hwc->event_base + idx, new_raw_count);
 
-        if (atomic64_cmpxchg(&hwc->prev_count, prev_raw_count,
+        if (local64_cmpxchg(&hwc->prev_count, prev_raw_count,
                                         new_raw_count) != prev_raw_count)
                 goto again;
 
@@ -313,8 +314,8 @@ again:
         delta = (new_raw_count << shift) - (prev_raw_count << shift);
         delta >>= shift;
 
-        atomic64_add(delta, &event->count);
-        atomic64_sub(delta, &hwc->period_left);
+        local64_add(delta, &event->count);
+        local64_sub(delta, &hwc->period_left);
 
         return new_raw_count;
 }
@@ -438,7 +439,7 @@ static int x86_setup_perfctr(struct perf_event *event)
         if (!hwc->sample_period) {
                 hwc->sample_period = x86_pmu.max_period;
                 hwc->last_period = hwc->sample_period;
-                atomic64_set(&hwc->period_left, hwc->sample_period);
+                local64_set(&hwc->period_left, hwc->sample_period);
         } else {
                 /*
                  * If we have a PMU initialized but no APIC
@@ -885,7 +886,7 @@ static int
 x86_perf_event_set_period(struct perf_event *event)
 {
         struct hw_perf_event *hwc = &event->hw;
-        s64 left = atomic64_read(&hwc->period_left);
+        s64 left = local64_read(&hwc->period_left);
         s64 period = hwc->sample_period;
         int ret = 0, idx = hwc->idx;
 
@@ -897,14 +898,14 @@ x86_perf_event_set_period(struct perf_event *event)
          */
         if (unlikely(left <= -period)) {
                 left = period;
-                atomic64_set(&hwc->period_left, left);
+                local64_set(&hwc->period_left, left);
                 hwc->last_period = period;
                 ret = 1;
         }
 
         if (unlikely(left <= 0)) {
                 left += period;
-                atomic64_set(&hwc->period_left, left);
+                local64_set(&hwc->period_left, left);
                 hwc->last_period = period;
                 ret = 1;
         }
@@ -923,10 +924,19 @@ x86_perf_event_set_period(struct perf_event *event)
          * The hw event starts counting from this event offset,
          * mark it to be able to extra future deltas:
          */
-        atomic64_set(&hwc->prev_count, (u64)-left);
+        local64_set(&hwc->prev_count, (u64)-left);
 
-        wrmsrl(hwc->event_base + idx,
+        wrmsrl(hwc->event_base + idx, (u64)(-left) & x86_pmu.cntval_mask);
+
+        /*
+         * Due to erratum on certan cpu we need
+         * a second write to be sure the register
+         * is updated properly
+         */
+        if (x86_pmu.perfctr_second_write) {
+                wrmsrl(hwc->event_base + idx,
                         (u64)(-left) & x86_pmu.cntval_mask);
+        }
 
         perf_event_update_userpage(event);
 
@@ -969,7 +979,7 @@ static int x86_pmu_enable(struct perf_event *event)
          * skip the schedulability test here, it will be peformed
          * at commit time(->commit_txn) as a whole
          */
-        if (cpuc->group_flag & PERF_EVENT_TXN_STARTED)
+        if (cpuc->group_flag & PERF_EVENT_TXN)
                 goto out;
 
         ret = x86_pmu.schedule_events(cpuc, n, assign);
@@ -1096,7 +1106,7 @@ static void x86_pmu_disable(struct perf_event *event)
          * The events never got scheduled and ->cancel_txn will truncate
          * the event_list.
          */
-        if (cpuc->group_flag & PERF_EVENT_TXN_STARTED)
+        if (cpuc->group_flag & PERF_EVENT_TXN)
                 return;
 
         x86_pmu_stop(event);
@@ -1388,7 +1398,7 @@ static void x86_pmu_start_txn(const struct pmu *pmu)
 {
         struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
 
-        cpuc->group_flag |= PERF_EVENT_TXN_STARTED;
+        cpuc->group_flag |= PERF_EVENT_TXN;
         cpuc->n_txn = 0;
 }
 
@@ -1401,7 +1411,7 @@ static void x86_pmu_cancel_txn(const struct pmu *pmu)
 {
         struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events);
 
-        cpuc->group_flag &= ~PERF_EVENT_TXN_STARTED;
+        cpuc->group_flag &= ~PERF_EVENT_TXN;
         /*
          * Truncate the collected events.
          */
@@ -1435,11 +1445,7 @@ static int x86_pmu_commit_txn(const struct pmu *pmu)
          */
         memcpy(cpuc->assign, assign, n*sizeof(int));
 
-        /*
-         * Clear out the txn count so that ->cancel_txn() which gets
-         * run after ->commit_txn() doesn't undo things.
-         */
-        cpuc->n_txn = 0;
+        cpuc->group_flag &= ~PERF_EVENT_TXN;
 
         return 0;
 }
@@ -1607,8 +1613,6 @@ static const struct stacktrace_ops backtrace_ops = {
         .walk_stack             = print_context_stack_bp,
 };
 
-#include "../dumpstack.h"
-
 static void
 perf_callchain_kernel(struct pt_regs *regs, struct perf_callchain_entry *entry)
 {
@@ -1730,22 +1734,6 @@ struct perf_callchain_entry *perf_callchain(struct pt_regs *regs)
         return entry;
 }
 
-void perf_arch_fetch_caller_regs(struct pt_regs *regs, unsigned long ip, int skip)
-{
-        regs->ip = ip;
-        /*
-         * perf_arch_fetch_caller_regs adds another call, we need to increment
-         * the skip level
-         */
-        regs->bp = rewind_frame_pointer(skip + 1);
-        regs->cs = __KERNEL_CS;
-        /*
-         * We abuse bit 3 to pass exact information, see perf_misc_flags
-         * and the comment with PERF_EFLAGS_EXACT.
-         */
-        regs->flags = 0;
-}
-
 unsigned long perf_instruction_pointer(struct pt_regs *regs)
 {
         unsigned long ip;
diff --git a/arch/x86/kernel/cpu/perf_event_p4.c b/arch/x86/kernel/cpu/perf_event_p4.c
index ae85d69644d1..107711bf0ee8 100644
--- a/arch/x86/kernel/cpu/perf_event_p4.c
+++ b/arch/x86/kernel/cpu/perf_event_p4.c
@@ -21,22 +21,36 @@ struct p4_event_bind {
         char cntr[2][P4_CNTR_LIMIT];            /* counter index (offset), -1 on abscence */
 };
 
-struct p4_cache_event_bind {
+struct p4_pebs_bind {
         unsigned int metric_pebs;
         unsigned int metric_vert;
 };
 
-#define P4_GEN_CACHE_EVENT_BIND(name)           \
-        [P4_CACHE__##name] = {                  \
-                .metric_pebs = P4_PEBS__##name, \
-                .metric_vert = P4_VERT__##name, \
+/* it sets P4_PEBS_ENABLE_UOP_TAG as well */
+#define P4_GEN_PEBS_BIND(name, pebs, vert)                      \
+        [P4_PEBS_METRIC__##name] = {                            \
+                .metric_pebs = pebs | P4_PEBS_ENABLE_UOP_TAG,   \
+                .metric_vert = vert,                            \
         }
 
-static struct p4_cache_event_bind p4_cache_event_bind_map[] = {
-        P4_GEN_CACHE_EVENT_BIND(1stl_cache_load_miss_retired),
-        P4_GEN_CACHE_EVENT_BIND(2ndl_cache_load_miss_retired),
-        P4_GEN_CACHE_EVENT_BIND(dtlb_load_miss_retired),
-        P4_GEN_CACHE_EVENT_BIND(dtlb_store_miss_retired),
+/*
+ * note we have P4_PEBS_ENABLE_UOP_TAG always set here
+ *
+ * it's needed for mapping P4_PEBS_CONFIG_METRIC_MASK bits of
+ * event configuration to find out which values are to be
+ * written into MSR_IA32_PEBS_ENABLE and MSR_P4_PEBS_MATRIX_VERT
+ * resgisters
+ */
+static struct p4_pebs_bind p4_pebs_bind_map[] = {
+        P4_GEN_PEBS_BIND(1stl_cache_load_miss_retired,  0x0000001, 0x0000001),
+        P4_GEN_PEBS_BIND(2ndl_cache_load_miss_retired,  0x0000002, 0x0000001),
+        P4_GEN_PEBS_BIND(dtlb_load_miss_retired,        0x0000004, 0x0000001),
+        P4_GEN_PEBS_BIND(dtlb_store_miss_retired,       0x0000004, 0x0000002),
+        P4_GEN_PEBS_BIND(dtlb_all_miss_retired,         0x0000004, 0x0000003),
+        P4_GEN_PEBS_BIND(tagged_mispred_branch,         0x0018000, 0x0000010),
+        P4_GEN_PEBS_BIND(mob_load_replay_retired,       0x0000200, 0x0000001),
+        P4_GEN_PEBS_BIND(split_load_retired,            0x0000400, 0x0000001),
+        P4_GEN_PEBS_BIND(split_store_retired,           0x0000400, 0x0000002),
 };
 
 /*
@@ -281,10 +295,10 @@ static struct p4_event_bind p4_event_bind_map[] = {
         },
 };
 
-#define P4_GEN_CACHE_EVENT(event, bit, cache_event)                       \
+#define P4_GEN_CACHE_EVENT(event, bit, metric)                            \
         p4_config_pack_escr(P4_ESCR_EVENT(event)                        | \
                             P4_ESCR_EMASK_BIT(event, bit))              | \
-        p4_config_pack_cccr(cache_event                                 | \
+        p4_config_pack_cccr(metric                                      | \
                             P4_CCCR_ESEL(P4_OPCODE_ESEL(P4_OPCODE(event))))
 
 static __initconst const u64 p4_hw_cache_event_ids
@@ -296,34 +310,34 @@ static __initconst const u64 p4_hw_cache_event_ids
         [ C(OP_READ) ] = {
                 [ C(RESULT_ACCESS) ] = 0x0,
                 [ C(RESULT_MISS)   ] = P4_GEN_CACHE_EVENT(P4_EVENT_REPLAY_EVENT, NBOGUS,
-                                                P4_CACHE__1stl_cache_load_miss_retired),
+                                                P4_PEBS_METRIC__1stl_cache_load_miss_retired),
         },
  },
  [ C(LL  ) ] = {
         [ C(OP_READ) ] = {
                 [ C(RESULT_ACCESS) ] = 0x0,
                 [ C(RESULT_MISS)   ] = P4_GEN_CACHE_EVENT(P4_EVENT_REPLAY_EVENT, NBOGUS,
-                                                P4_CACHE__2ndl_cache_load_miss_retired),
+                                                P4_PEBS_METRIC__2ndl_cache_load_miss_retired),
         },
 },
  [ C(DTLB) ] = {
         [ C(OP_READ) ] = {
                 [ C(RESULT_ACCESS) ] = 0x0,
                 [ C(RESULT_MISS)   ] = P4_GEN_CACHE_EVENT(P4_EVENT_REPLAY_EVENT, NBOGUS,
-                                                P4_CACHE__dtlb_load_miss_retired),
+                                                P4_PEBS_METRIC__dtlb_load_miss_retired),
         },
         [ C(OP_WRITE) ] = {
                 [ C(RESULT_ACCESS) ] = 0x0,
                 [ C(RESULT_MISS)   ] = P4_GEN_CACHE_EVENT(P4_EVENT_REPLAY_EVENT, NBOGUS,
-                                                P4_CACHE__dtlb_store_miss_retired),
+                                                P4_PEBS_METRIC__dtlb_store_miss_retired),
         },
  },
  [ C(ITLB) ] = {
         [ C(OP_READ) ] = {
                 [ C(RESULT_ACCESS) ] = P4_GEN_CACHE_EVENT(P4_EVENT_ITLB_REFERENCE, HIT,
-                                                P4_CACHE__itlb_reference_hit),
+                                                P4_PEBS_METRIC__none),
                 [ C(RESULT_MISS)   ] = P4_GEN_CACHE_EVENT(P4_EVENT_ITLB_REFERENCE, MISS,
-                                                P4_CACHE__itlb_reference_miss),
+                                                P4_PEBS_METRIC__none),
         },
         [ C(OP_WRITE) ] = {
                 [ C(RESULT_ACCESS) ] = -1,
@@ -414,11 +428,37 @@ static u64 p4_pmu_event_map(int hw_event)
         return config;
 }
 
+static int p4_validate_raw_event(struct perf_event *event)
+{
+        unsigned int v;
+
+        /* user data may have out-of-bound event index */
+        v = p4_config_unpack_event(event->attr.config);
+        if (v >= ARRAY_SIZE(p4_event_bind_map)) {
+                pr_warning("P4 PMU: Unknown event code: %d\n", v);
+                return -EINVAL;
+        }
+
+        /*
+         * it may have some screwed PEBS bits
+         */
+        if (p4_config_pebs_has(event->attr.config, P4_PEBS_CONFIG_ENABLE)) {
+                pr_warning("P4 PMU: PEBS are not supported yet\n");
+                return -EINVAL;
+        }
+        v = p4_config_unpack_metric(event->attr.config);
+        if (v >= ARRAY_SIZE(p4_pebs_bind_map)) {
+                pr_warning("P4 PMU: Unknown metric code: %d\n", v);
+                return -EINVAL;
+        }
+
+        return 0;
+}
+
 static int p4_hw_config(struct perf_event *event)
 {
         int cpu = get_cpu();
         int rc = 0;
-        unsigned int evnt;
         u32 escr, cccr;
 
         /*
@@ -438,12 +478,9 @@ static int p4_hw_config(struct perf_event *event)
 
         if (event->attr.type == PERF_TYPE_RAW) {
 
-                /* user data may have out-of-bound event index */
-                evnt = p4_config_unpack_event(event->attr.config);
-                if (evnt >= ARRAY_SIZE(p4_event_bind_map)) {
-                        rc = -EINVAL;
+                rc = p4_validate_raw_event(event);
+                if (rc)
                         goto out;
-                }
 
                 /*
                  * We don't control raw events so it's up to the caller
@@ -451,12 +488,15 @@ static int p4_hw_config(struct perf_event *event)
                  * on HT machine but allow HT-compatible specifics to be
                  * passed on)
                  *
+                 * Note that for RAW events we allow user to use P4_CCCR_RESERVED
+                 * bits since we keep additional info here (for cache events and etc)
+                 *
                  * XXX: HT wide things should check perf_paranoid_cpu() &&
                  *      CAP_SYS_ADMIN
                  */
                 event->hw.config |= event->attr.config &
                         (p4_config_pack_escr(P4_ESCR_MASK_HT) |
-                         p4_config_pack_cccr(P4_CCCR_MASK_HT));
+                         p4_config_pack_cccr(P4_CCCR_MASK_HT | P4_CCCR_RESERVED));
         }
 
         rc = x86_setup_perfctr(event);
@@ -482,6 +522,29 @@ static inline int p4_pmu_clear_cccr_ovf(struct hw_perf_event *hwc)
         return overflow;
 }
 
+static void p4_pmu_disable_pebs(void)
+{
+        /*
+         * FIXME
+         *
+         * It's still allowed that two threads setup same cache
+         * events so we can't simply clear metrics until we knew
+         * noone is depending on us, so we need kind of counter
+         * for "ReplayEvent" users.
+         *
+         * What is more complex -- RAW events, if user (for some
+         * reason) will pass some cache event metric with improper
+         * event opcode -- it's fine from hardware point of view
+         * but completely nonsence from "meaning" of such action.
+         *
+         * So at moment let leave metrics turned on forever -- it's
+         * ok for now but need to be revisited!
+         *
+         * (void)checking_wrmsrl(MSR_IA32_PEBS_ENABLE, (u64)0);
+         * (void)checking_wrmsrl(MSR_P4_PEBS_MATRIX_VERT, (u64)0);
+         */
+}
+
 static inline void p4_pmu_disable_event(struct perf_event *event)
 {
         struct hw_perf_event *hwc = &event->hw;
@@ -507,6 +570,26 @@ static void p4_pmu_disable_all(void)
                         continue;
                 p4_pmu_disable_event(event);
         }
+
+        p4_pmu_disable_pebs();
+}
+
+/* configuration must be valid */
+static void p4_pmu_enable_pebs(u64 config)
+{
+        struct p4_pebs_bind *bind;
+        unsigned int idx;
+
+        BUILD_BUG_ON(P4_PEBS_METRIC__max > P4_PEBS_CONFIG_METRIC_MASK);
+
+        idx = p4_config_unpack_metric(config);
+        if (idx == P4_PEBS_METRIC__none)
+                return;
+
+        bind = &p4_pebs_bind_map[idx];
+
+        (void)checking_wrmsrl(MSR_IA32_PEBS_ENABLE,     (u64)bind->metric_pebs);
+        (void)checking_wrmsrl(MSR_P4_PEBS_MATRIX_VERT,  (u64)bind->metric_vert);
 }
 
 static void p4_pmu_enable_event(struct perf_event *event)
@@ -515,9 +598,7 @@ static void p4_pmu_enable_event(struct perf_event *event)
         int thread = p4_ht_config_thread(hwc->config);
         u64 escr_conf = p4_config_unpack_escr(p4_clear_ht_bit(hwc->config));
         unsigned int idx = p4_config_unpack_event(hwc->config);
-        unsigned int idx_cache = p4_config_unpack_cache_event(hwc->config);
         struct p4_event_bind *bind;
-        struct p4_cache_event_bind *bind_cache;
         u64 escr_addr, cccr;
 
         bind = &p4_event_bind_map[idx];
@@ -537,16 +618,10 @@ static void p4_pmu_enable_event(struct perf_event *event)
         cccr = p4_config_unpack_cccr(hwc->config);
 
         /*
-         * it could be Cache event so that we need to
-         * set metrics into additional MSRs
+         * it could be Cache event so we need to write metrics
+         * into additional MSRs
          */
-        BUILD_BUG_ON(P4_CACHE__MAX > P4_CCCR_CACHE_OPS_MASK);
-        if (idx_cache > P4_CACHE__NONE &&
-                idx_cache < ARRAY_SIZE(p4_cache_event_bind_map)) {
-                bind_cache = &p4_cache_event_bind_map[idx_cache];
-                (void)checking_wrmsrl(MSR_IA32_PEBS_ENABLE, (u64)bind_cache->metric_pebs);
-                (void)checking_wrmsrl(MSR_P4_PEBS_MATRIX_VERT, (u64)bind_cache->metric_vert);
-        }
+        p4_pmu_enable_pebs(hwc->config);
 
         (void)checking_wrmsrl(escr_addr, escr_conf);
         (void)checking_wrmsrl(hwc->config_base + hwc->idx,
@@ -829,6 +904,15 @@ static __initconst const struct x86_pmu p4_pmu = {
         .max_period             = (1ULL << 39) - 1,
         .hw_config              = p4_hw_config,
         .schedule_events        = p4_pmu_schedule_events,
+        /*
+         * This handles erratum N15 in intel doc 249199-029,
+         * the counter may not be updated correctly on write
+         * so we need a second write operation to do the trick
+         * (the official workaround didn't work)
+         *
+         * the former idea is taken from OProfile code
+         */
+        .perfctr_second_write   = 1,
 };
 
 static __init int p4_pmu_init(void)
diff --git a/arch/x86/kernel/dumpstack.c b/arch/x86/kernel/dumpstack.c
index c89a386930b7..6e8752c1bd52 100644
--- a/arch/x86/kernel/dumpstack.c
+++ b/arch/x86/kernel/dumpstack.c
@@ -18,7 +18,6 @@
 
 #include <asm/stacktrace.h>
 
-#include "dumpstack.h"
 
 int panic_on_unrecovered_nmi;
 int panic_on_io_nmi;
diff --git a/arch/x86/kernel/dumpstack.h b/arch/x86/kernel/dumpstack.h
deleted file mode 100644
index e1a93be4fd44..000000000000
--- a/arch/x86/kernel/dumpstack.h
+++ /dev/null
@@ -1,56 +0,0 @@
-/*
- *  Copyright (C) 1991, 1992  Linus Torvalds
- *  Copyright (C) 2000, 2001, 2002 Andi Kleen, SuSE Labs
- */
-
-#ifndef DUMPSTACK_H
-#define DUMPSTACK_H
-
-#ifdef CONFIG_X86_32
-#define STACKSLOTS_PER_LINE 8
-#define get_bp(bp) asm("movl %%ebp, %0" : "=r" (bp) :)
-#else
-#define STACKSLOTS_PER_LINE 4
-#define get_bp(bp) asm("movq %%rbp, %0" : "=r" (bp) :)
-#endif
-
-#include <linux/uaccess.h>
-
-extern void
-show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
-                unsigned long *stack, unsigned long bp, char *log_lvl);
-
-extern void
-show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
-                unsigned long *sp, unsigned long bp, char *log_lvl);
-
-extern unsigned int code_bytes;
-
-/* The form of the top of the frame on the stack */
-struct stack_frame {
-        struct stack_frame *next_frame;
-        unsigned long return_address;
-};
-
-struct stack_frame_ia32 {
-    u32 next_frame;
-    u32 return_address;
-};
-
-static inline unsigned long rewind_frame_pointer(int n)
-{
-        struct stack_frame *frame;
-
-        get_bp(frame);
-
-#ifdef CONFIG_FRAME_POINTER
-        while (n--) {
-                if (probe_kernel_address(&frame->next_frame, frame))
-                        break;
-        }
-#endif
-
-        return (unsigned long)frame;
-}
-
-#endif /* DUMPSTACK_H */
diff --git a/arch/x86/kernel/dumpstack_32.c b/arch/x86/kernel/dumpstack_32.c
index 11540a189d93..0f6376ffa2d9 100644
--- a/arch/x86/kernel/dumpstack_32.c
+++ b/arch/x86/kernel/dumpstack_32.c
@@ -16,8 +16,6 @@
 
 #include <asm/stacktrace.h>
 
-#include "dumpstack.h"
-
 
 void dump_trace(struct task_struct *task, struct pt_regs *regs,
                 unsigned long *stack, unsigned long bp,
diff --git a/arch/x86/kernel/dumpstack_64.c b/arch/x86/kernel/dumpstack_64.c
index 272c9f1f05f3..57a21f11c791 100644
--- a/arch/x86/kernel/dumpstack_64.c
+++ b/arch/x86/kernel/dumpstack_64.c
@@ -16,7 +16,6 @@
 
 #include <asm/stacktrace.h>
 
-#include "dumpstack.h"
 
 #define N_EXCEPTION_STACKS_END \
                 (N_EXCEPTION_STACKS + DEBUG_STKSZ/EXCEPTION_STKSZ - 2)
diff --git a/arch/x86/kernel/hw_breakpoint.c b/arch/x86/kernel/hw_breakpoint.c
index a8f1b803d2fd..a474ec37c32f 100644
--- a/arch/x86/kernel/hw_breakpoint.c
+++ b/arch/x86/kernel/hw_breakpoint.c
@@ -208,6 +208,9 @@ int arch_bp_generic_fields(int x86_len, int x86_type,
 {
         /* Len */
         switch (x86_len) {
+        case X86_BREAKPOINT_LEN_X:
+                *gen_len = sizeof(long);
+                break;
         case X86_BREAKPOINT_LEN_1:
                 *gen_len = HW_BREAKPOINT_LEN_1;
                 break;
@@ -251,6 +254,29 @@ static int arch_build_bp_info(struct perf_event *bp)
 
         info->address = bp->attr.bp_addr;
 
+        /* Type */
+        switch (bp->attr.bp_type) {
+        case HW_BREAKPOINT_W:
+                info->type = X86_BREAKPOINT_WRITE;
+                break;
+        case HW_BREAKPOINT_W | HW_BREAKPOINT_R:
+                info->type = X86_BREAKPOINT_RW;
+                break;
+        case HW_BREAKPOINT_X:
+                info->type = X86_BREAKPOINT_EXECUTE;
+                /*
+                 * x86 inst breakpoints need to have a specific undefined len.
+                 * But we still need to check userspace is not trying to setup
+                 * an unsupported length, to get a range breakpoint for example.
+                 */
+                if (bp->attr.bp_len == sizeof(long)) {
+                        info->len = X86_BREAKPOINT_LEN_X;
+                        return 0;
+                }
+        default:
+                return -EINVAL;
+        }
+
         /* Len */
         switch (bp->attr.bp_len) {
         case HW_BREAKPOINT_LEN_1:
@@ -271,21 +297,6 @@ static int arch_build_bp_info(struct perf_event *bp)
                 return -EINVAL;
         }
 
-        /* Type */
-        switch (bp->attr.bp_type) {
-        case HW_BREAKPOINT_W:
-                info->type = X86_BREAKPOINT_WRITE;
-                break;
-        case HW_BREAKPOINT_W | HW_BREAKPOINT_R:
-                info->type = X86_BREAKPOINT_RW;
-                break;
-        case HW_BREAKPOINT_X:
-                info->type = X86_BREAKPOINT_EXECUTE;
-                break;
-        default:
-                return -EINVAL;
-        }
-
         return 0;
 }
 /*
@@ -305,6 +316,9 @@ int arch_validate_hwbkpt_settings(struct perf_event *bp)
         ret = -EINVAL;
 
         switch (info->len) {
+        case X86_BREAKPOINT_LEN_X:
+                align = sizeof(long) -1;
+                break;
         case X86_BREAKPOINT_LEN_1:
                 align = 0;
                 break;
@@ -466,6 +480,13 @@ static int __kprobes hw_breakpoint_handler(struct die_args *args)
 
                 perf_bp_event(bp, args->regs);
 
+                /*
+                 * Set up resume flag to avoid breakpoint recursion when
+                 * returning back to origin.
+                 */
+                if (bp->hw.info.type == X86_BREAKPOINT_EXECUTE)
+                        args->regs->flags |= X86_EFLAGS_RF;
+
                 rcu_read_unlock();
         }
         /*
diff --git a/arch/x86/kernel/kprobes.c b/arch/x86/kernel/kprobes.c
index 675879b65ce6..1bfb6cf4dd55 100644
--- a/arch/x86/kernel/kprobes.c
+++ b/arch/x86/kernel/kprobes.c
@@ -126,16 +126,22 @@ static void __kprobes synthesize_reljump(void *from, void *to)
 }
 
 /*
- * Check for the REX prefix which can only exist on X86_64
- * X86_32 always returns 0
+ * Skip the prefixes of the instruction.
  */
-static int __kprobes is_REX_prefix(kprobe_opcode_t *insn)
+static kprobe_opcode_t *__kprobes skip_prefixes(kprobe_opcode_t *insn)
 {
+        insn_attr_t attr;
+
+        attr = inat_get_opcode_attribute((insn_byte_t)*insn);
+        while (inat_is_legacy_prefix(attr)) {
+                insn++;
+                attr = inat_get_opcode_attribute((insn_byte_t)*insn);
+        }
 #ifdef CONFIG_X86_64
-        if ((*insn & 0xf0) == 0x40)
-                return 1;
+        if (inat_is_rex_prefix(attr))
+                insn++;
 #endif
-        return 0;
+        return insn;
 }
 
 /*
@@ -272,6 +278,9 @@ static int __kprobes can_probe(unsigned long paddr)
  */
 static int __kprobes is_IF_modifier(kprobe_opcode_t *insn)
 {
+        /* Skip prefixes */
+        insn = skip_prefixes(insn);
+
         switch (*insn) {
         case 0xfa:              /* cli */
         case 0xfb:              /* sti */
@@ -280,13 +289,6 @@ static int __kprobes is_IF_modifier(kprobe_opcode_t *insn)
                 return 1;
         }
 
-        /*
-         * on X86_64, 0x40-0x4f are REX prefixes so we need to look
-         * at the next byte instead.. but of course not recurse infinitely
-         */
-        if (is_REX_prefix(insn))
-                return is_IF_modifier(++insn);
-
         return 0;
 }
 
@@ -803,9 +805,8 @@ static void __kprobes resume_execution(struct kprobe *p,
         unsigned long orig_ip = (unsigned long)p->addr;
         kprobe_opcode_t *insn = p->ainsn.insn;
 
-        /*skip the REX prefix*/
-        if (is_REX_prefix(insn))
-                insn++;
+        /* Skip prefixes */
+        insn = skip_prefixes(insn);
 
         regs->flags &= ~X86_EFLAGS_TF;
         switch (*insn) {
diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c
index 8d128783af47..96586c3cbbbf 100644
--- a/arch/x86/kernel/process_32.c
+++ b/arch/x86/kernel/process_32.c
@@ -57,6 +57,8 @@
 #include <asm/syscalls.h>
 #include <asm/debugreg.h>
 
+#include <trace/events/power.h>
+
 asmlinkage void ret_from_fork(void) __asm__("ret_from_fork");
 
 /*
@@ -111,6 +113,8 @@ void cpu_idle(void)
                         stop_critical_timings();
                         pm_idle();
                         start_critical_timings();
+
+                        trace_power_end(smp_processor_id());
                 }
                 tick_nohz_restart_sched_tick();
                 preempt_enable_no_resched();
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index 3c2422a99f1f..3d9ea531ddd1 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -51,6 +51,8 @@
 #include <asm/syscalls.h>
 #include <asm/debugreg.h>
 
+#include <trace/events/power.h>
+
 asmlinkage extern void ret_from_fork(void);
 
 DEFINE_PER_CPU(unsigned long, old_rsp);
@@ -138,6 +140,9 @@ void cpu_idle(void)
                         stop_critical_timings();
                         pm_idle();
                         start_critical_timings();
+
+                        trace_power_end(smp_processor_id());
+
                         /* In many cases the interrupt that ended idle
                            has already called exit_idle. But some idle
                            loops can be woken up without interrupt. */
diff --git a/arch/x86/kernel/stacktrace.c b/arch/x86/kernel/stacktrace.c
index 922eefbb3f6c..b53c525368a7 100644
--- a/arch/x86/kernel/stacktrace.c
+++ b/arch/x86/kernel/stacktrace.c
@@ -23,11 +23,16 @@ static int save_stack_stack(void *data, char *name)
         return 0;
 }
 
-static void save_stack_address(void *data, unsigned long addr, int reliable)
+static void
+__save_stack_address(void *data, unsigned long addr, bool reliable, bool nosched)
 {
         struct stack_trace *trace = data;
+#ifdef CONFIG_FRAME_POINTER
         if (!reliable)
                 return;
+#endif
+        if (nosched && in_sched_functions(addr))
+                return;
         if (trace->skip > 0) {
                 trace->skip--;
                 return;
@@ -36,20 +41,15 @@ static void save_stack_address(void *data, unsigned long addr, int reliable)
                 trace->entries[trace->nr_entries++] = addr;
 }
 
+static void save_stack_address(void *data, unsigned long addr, int reliable)
+{
+        return __save_stack_address(data, addr, reliable, false);
+}
+
 static void
 save_stack_address_nosched(void *data, unsigned long addr, int reliable)
 {
-        struct stack_trace *trace = (struct stack_trace *)data;
-        if (!reliable)
-                return;
-        if (in_sched_functions(addr))
-                return;
-        if (trace->skip > 0) {
-                trace->skip--;
-                return;
-        }
-        if (trace->nr_entries < trace->max_entries)
-                trace->entries[trace->nr_entries++] = addr;
+        return __save_stack_address(data, addr, reliable, true);
 }
 
 static const struct stacktrace_ops save_stack_ops = {
@@ -96,12 +96,13 @@ EXPORT_SYMBOL_GPL(save_stack_trace_tsk);
 
 /* Userspace stacktrace - based on kernel/trace/trace_sysprof.c */
 
-struct stack_frame {
+struct stack_frame_user {
         const void __user       *next_fp;
         unsigned long           ret_addr;
 };
 
-static int copy_stack_frame(const void __user *fp, struct stack_frame *frame)
+static int
+copy_stack_frame(const void __user *fp, struct stack_frame_user *frame)
 {
         int ret;
 
@@ -126,7 +127,7 @@ static inline void __save_stack_trace_user(struct stack_trace *trace)
                 trace->entries[trace->nr_entries++] = regs->ip;
 
         while (trace->nr_entries < trace->max_entries) {
-                struct stack_frame frame;
+                struct stack_frame_user frame;
 
                 frame.next_fp = NULL;
                 frame.ret_addr = 0;
diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
index 725ef4d17cd5..60788dee0f8a 100644
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -392,7 +392,13 @@ static notrace __kprobes void default_do_nmi(struct pt_regs *regs)
                 if (notify_die(DIE_NMI_IPI, "nmi_ipi", regs, reason, 2, SIGINT)
                                                                 == NOTIFY_STOP)
                         return;
+
 #ifdef CONFIG_X86_LOCAL_APIC
+                if (notify_die(DIE_NMI, "nmi", regs, reason, 2, SIGINT)
+                                                        == NOTIFY_STOP)
+                        return;
+
+#ifndef CONFIG_LOCKUP_DETECTOR
                 /*
                  * Ok, so this is none of the documented NMI sources,
                  * so it must be the NMI watchdog.
@@ -400,6 +406,7 @@ static notrace __kprobes void default_do_nmi(struct pt_regs *regs)
                 if (nmi_watchdog_tick(regs, reason))
                         return;
                 if (!do_nmi_callback(regs, cpu))
+#endif /* !CONFIG_LOCKUP_DETECTOR */
                         unknown_nmi_error(reason, regs);
 #else
                 unknown_nmi_error(reason, regs);
diff --git a/arch/x86/mm/pf_in.c b/arch/x86/mm/pf_in.c
index 308e32570d84..38e6d174c497 100644
--- a/arch/x86/mm/pf_in.c
+++ b/arch/x86/mm/pf_in.c
@@ -40,16 +40,16 @@ static unsigned char prefix_codes[] = {
 static unsigned int reg_rop[] = {
         0x8A, 0x8B, 0xB60F, 0xB70F, 0xBE0F, 0xBF0F
 };
-static unsigned int reg_wop[] = { 0x88, 0x89 };
+static unsigned int reg_wop[] = { 0x88, 0x89, 0xAA, 0xAB };
 static unsigned int imm_wop[] = { 0xC6, 0xC7 };
 /* IA32 Manual 3, 3-432*/
-static unsigned int rw8[] = { 0x88, 0x8A, 0xC6 };
+static unsigned int rw8[] = { 0x88, 0x8A, 0xC6, 0xAA };
 static unsigned int rw32[] = {
-        0x89, 0x8B, 0xC7, 0xB60F, 0xB70F, 0xBE0F, 0xBF0F
+        0x89, 0x8B, 0xC7, 0xB60F, 0xB70F, 0xBE0F, 0xBF0F, 0xAB
 };
-static unsigned int mw8[] = { 0x88, 0x8A, 0xC6, 0xB60F, 0xBE0F };
+static unsigned int mw8[] = { 0x88, 0x8A, 0xC6, 0xB60F, 0xBE0F, 0xAA };
 static unsigned int mw16[] = { 0xB70F, 0xBF0F };
-static unsigned int mw32[] = { 0x89, 0x8B, 0xC7 };
+static unsigned int mw32[] = { 0x89, 0x8B, 0xC7, 0xAB };
 static unsigned int mw64[] = {};
 #else /* not __i386__ */
 static unsigned char prefix_codes[] = {
@@ -63,20 +63,20 @@ static unsigned char prefix_codes[] = {
 static unsigned int reg_rop[] = {
         0x8A, 0x8B, 0xB60F, 0xB70F, 0xBE0F, 0xBF0F
 };
-static unsigned int reg_wop[] = { 0x88, 0x89 };
+static unsigned int reg_wop[] = { 0x88, 0x89, 0xAA, 0xAB };
 static unsigned int imm_wop[] = { 0xC6, 0xC7 };
-static unsigned int rw8[] = { 0xC6, 0x88, 0x8A };
+static unsigned int rw8[] = { 0xC6, 0x88, 0x8A, 0xAA };
 static unsigned int rw32[] = {
-        0xC7, 0x89, 0x8B, 0xB60F, 0xB70F, 0xBE0F, 0xBF0F
+        0xC7, 0x89, 0x8B, 0xB60F, 0xB70F, 0xBE0F, 0xBF0F, 0xAB
 };
 /* 8 bit only */
-static unsigned int mw8[] = { 0xC6, 0x88, 0x8A, 0xB60F, 0xBE0F };
+static unsigned int mw8[] = { 0xC6, 0x88, 0x8A, 0xB60F, 0xBE0F, 0xAA };
 /* 16 bit only */
 static unsigned int mw16[] = { 0xB70F, 0xBF0F };
 /* 16 or 32 bit */
 static unsigned int mw32[] = { 0xC7 };
 /* 16, 32 or 64 bit */
-static unsigned int mw64[] = { 0x89, 0x8B };
+static unsigned int mw64[] = { 0x89, 0x8B, 0xAB };
 #endif /* not __i386__ */
 
 struct prefix_bits {
@@ -410,7 +410,6 @@ static unsigned long *get_reg_w32(int no, struct pt_regs *regs)
 unsigned long get_ins_reg_val(unsigned long ins_addr, struct pt_regs *regs)
 {
         unsigned int opcode;
-        unsigned char mod_rm;
         int reg;
         unsigned char *p;
         struct prefix_bits prf;
@@ -437,8 +436,13 @@ unsigned long get_ins_reg_val(unsigned long ins_addr, struct pt_regs *regs)
         goto err;
 
 do_work:
-        mod_rm = *p;
-        reg = ((mod_rm >> 3) & 0x7) | (prf.rexr << 3);
+        /* for STOS, source register is fixed */
+        if (opcode == 0xAA || opcode == 0xAB) {
+                reg = arg_AX;
+        } else {
+                unsigned char mod_rm = *p;
+                reg = ((mod_rm >> 3) & 0x7) | (prf.rexr << 3);
+        }
         switch (get_ins_reg_width(ins_addr)) {
         case 1:
                 return *get_reg_w8(reg, prf.rex, regs);
diff --git a/arch/x86/oprofile/nmi_int.c b/arch/x86/oprofile/nmi_int.c
index b28d2f1253bb..1ba67dc8006a 100644
--- a/arch/x86/oprofile/nmi_int.c
+++ b/arch/x86/oprofile/nmi_int.c
@@ -634,6 +634,18 @@ static int __init ppro_init(char **cpu_type)
         if (force_arch_perfmon && cpu_has_arch_perfmon)
                 return 0;
 
+        /*
+         * Documentation on identifying Intel processors by CPU family
+         * and model can be found in the Intel Software Developer's
+         * Manuals (SDM):
+         *
+         *  http://www.intel.com/products/processor/manuals/
+         *
+         * As of May 2010 the documentation for this was in the:
+         * "Intel 64 and IA-32 Architectures Software Developer's
+         * Manual Volume 3B: System Programming Guide", "Table B-1
+         * CPUID Signature Values of DisplayFamily_DisplayModel".
+         */
         switch (cpu_model) {
         case 0 ... 2:
                 *cpu_type = "i386/ppro";
@@ -655,12 +667,12 @@ static int __init ppro_init(char **cpu_type)
         case 15: case 23:
                 *cpu_type = "i386/core_2";
                 break;
+        case 0x1a:
         case 0x2e:
-        case 26:
                 spec = &op_arch_perfmon_spec;
                 *cpu_type = "i386/core_i7";
                 break;
-        case 28:
+        case 0x1c:
                 *cpu_type = "i386/atom";
                 break;
         default: