Merge branch 'perf/mce' into perf/core

Merge reason: It's ready for v2.6.33.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

3 files changed, 93 insertions, 43 deletions

diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index cc25c2b4a567..9053be5d95cd 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -837,10 +837,8 @@ static void __cpuinit identify_cpu(struct cpuinfo_x86 *c)
                         boot_cpu_data.x86_capability[i] &= c->x86_capability[i];
         }
 
-#ifdef CONFIG_X86_MCE
         /* Init Machine Check Exception if available. */
-        mcheck_init(c);
-#endif
+        mcheck_cpu_init(c);
 
         select_idle_routine(c);
 
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 721a77ca8115..0bcaa3875863 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -46,6 +46,9 @@
 
 #include "mce-internal.h"
 
+#define CREATE_TRACE_POINTS
+#include <trace/events/mce.h>
+
 int mce_disabled __read_mostly;
 
 #define MISC_MCELOG_MINOR       227
@@ -85,18 +88,26 @@ static DECLARE_WAIT_QUEUE_HEAD(mce_wait);
 static DEFINE_PER_CPU(struct mce, mces_seen);
 static int                      cpu_missing;
 
-static void default_decode_mce(struct mce *m)
+/*
+ * CPU/chipset specific EDAC code can register a notifier call here to print
+ * MCE errors in a human-readable form.
+ */
+ATOMIC_NOTIFIER_HEAD(x86_mce_decoder_chain);
+EXPORT_SYMBOL_GPL(x86_mce_decoder_chain);
+
+static int default_decode_mce(struct notifier_block *nb, unsigned long val,
+                               void *data)
 {
         pr_emerg("No human readable MCE decoding support on this CPU type.\n");
         pr_emerg("Run the message through 'mcelog --ascii' to decode.\n");
+
+        return NOTIFY_STOP;
 }
 
-/*
- * CPU/chipset specific EDAC code can register a callback here to print
- * MCE errors in a human-readable form:
- */
-void (*x86_mce_decode_callback)(struct mce *m) = default_decode_mce;
-EXPORT_SYMBOL(x86_mce_decode_callback);
+static struct notifier_block mce_dec_nb = {
+        .notifier_call = default_decode_mce,
+        .priority      = -1,
+};
 
 /* MCA banks polled by the period polling timer for corrected events */
 DEFINE_PER_CPU(mce_banks_t, mce_poll_banks) = {
@@ -141,6 +152,9 @@ void mce_log(struct mce *mce)
 {
         unsigned next, entry;
 
+        /* Emit the trace record: */
+        trace_mce_record(mce);
+
         mce->finished = 0;
         wmb();
         for (;;) {
@@ -204,9 +218,9 @@ static void print_mce(struct mce *m)
 
         /*
          * Print out human-readable details about the MCE error,
-         * (if the CPU has an implementation for that):
+         * (if the CPU has an implementation for that)
          */
-        x86_mce_decode_callback(m);
+        atomic_notifier_call_chain(&x86_mce_decoder_chain, 0, m);
 }
 
 static void print_mce_head(void)
@@ -1122,7 +1136,7 @@ static int check_interval = 5 * 60; /* 5 minutes */
 static DEFINE_PER_CPU(int, mce_next_interval); /* in jiffies */
 static DEFINE_PER_CPU(struct timer_list, mce_timer);
 
-static void mcheck_timer(unsigned long data)
+static void mce_start_timer(unsigned long data)
 {
         struct timer_list *t = &per_cpu(mce_timer, data);
         int *n;
@@ -1187,7 +1201,7 @@ int mce_notify_irq(void)
 }
 EXPORT_SYMBOL_GPL(mce_notify_irq);
 
-static int mce_banks_init(void)
+static int __cpuinit __mcheck_cpu_mce_banks_init(void)
 {
         int i;
 
@@ -1206,7 +1220,7 @@ static int mce_banks_init(void)
 /*
  * Initialize Machine Checks for a CPU.
  */
-static int __cpuinit mce_cap_init(void)
+static int __cpuinit __mcheck_cpu_cap_init(void)
 {
         unsigned b;
         u64 cap;
@@ -1228,7 +1242,7 @@ static int __cpuinit mce_cap_init(void)
         WARN_ON(banks != 0 && b != banks);
         banks = b;
         if (!mce_banks) {
-                int err = mce_banks_init();
+                int err = __mcheck_cpu_mce_banks_init();
 
                 if (err)
                         return err;
@@ -1244,7 +1258,7 @@ static int __cpuinit mce_cap_init(void)
         return 0;
 }
 
-static void mce_init(void)
+static void __mcheck_cpu_init_generic(void)
 {
         mce_banks_t all_banks;
         u64 cap;
@@ -1273,7 +1287,7 @@ static void mce_init(void)
 }
 
 /* Add per CPU specific workarounds here */
-static int __cpuinit mce_cpu_quirks(struct cpuinfo_x86 *c)
+static int __cpuinit __mcheck_cpu_apply_quirks(struct cpuinfo_x86 *c)
 {
         if (c->x86_vendor == X86_VENDOR_UNKNOWN) {
                 pr_info("MCE: unknown CPU type - not enabling MCE support.\n");
@@ -1341,7 +1355,7 @@ static int __cpuinit mce_cpu_quirks(struct cpuinfo_x86 *c)
         return 0;
 }
 
-static void __cpuinit mce_ancient_init(struct cpuinfo_x86 *c)
+static void __cpuinit __mcheck_cpu_ancient_init(struct cpuinfo_x86 *c)
 {
         if (c->x86 != 5)
                 return;
@@ -1355,7 +1369,7 @@ static void __cpuinit mce_ancient_init(struct cpuinfo_x86 *c)
         }
 }
 
-static void mce_cpu_features(struct cpuinfo_x86 *c)
+static void __mcheck_cpu_init_vendor(struct cpuinfo_x86 *c)
 {
         switch (c->x86_vendor) {
         case X86_VENDOR_INTEL:
@@ -1369,7 +1383,7 @@ static void mce_cpu_features(struct cpuinfo_x86 *c)
         }
 }
 
-static void mce_init_timer(void)
+static void __mcheck_cpu_init_timer(void)
 {
         struct timer_list *t = &__get_cpu_var(mce_timer);
         int *n = &__get_cpu_var(mce_next_interval);
@@ -1380,7 +1394,7 @@ static void mce_init_timer(void)
         *n = check_interval * HZ;
         if (!*n)
                 return;
-        setup_timer(t, mcheck_timer, smp_processor_id());
+        setup_timer(t, mce_start_timer, smp_processor_id());
         t->expires = round_jiffies(jiffies + *n);
         add_timer_on(t, smp_processor_id());
 }
@@ -1400,27 +1414,28 @@ void (*machine_check_vector)(struct pt_regs *, long error_code) =
  * Called for each booted CPU to set up machine checks.
  * Must be called with preempt off:
  */
-void __cpuinit mcheck_init(struct cpuinfo_x86 *c)
+void __cpuinit mcheck_cpu_init(struct cpuinfo_x86 *c)
 {
         if (mce_disabled)
                 return;
 
-        mce_ancient_init(c);
+        __mcheck_cpu_ancient_init(c);
 
         if (!mce_available(c))
                 return;
 
-        if (mce_cap_init() < 0 || mce_cpu_quirks(c) < 0) {
+        if (__mcheck_cpu_cap_init() < 0 || __mcheck_cpu_apply_quirks(c) < 0) {
                 mce_disabled = 1;
                 return;
         }
 
         machine_check_vector = do_machine_check;
 
-        mce_init();
-        mce_cpu_features(c);
-        mce_init_timer();
+        __mcheck_cpu_init_generic();
+        __mcheck_cpu_init_vendor(c);
+        __mcheck_cpu_init_timer();
         INIT_WORK(&__get_cpu_var(mce_work), mce_process_work);
+
 }
 
 /*
@@ -1640,6 +1655,15 @@ static int __init mcheck_enable(char *str)
 }
 __setup("mce", mcheck_enable);
 
+int __init mcheck_init(void)
+{
+        atomic_notifier_chain_register(&x86_mce_decoder_chain, &mce_dec_nb);
+
+        mcheck_intel_therm_init();
+
+        return 0;
+}
+
 /*
  * Sysfs support
  */
@@ -1648,7 +1672,7 @@ __setup("mce", mcheck_enable);
  * Disable machine checks on suspend and shutdown. We can't really handle
  * them later.
  */
-static int mce_disable(void)
+static int mce_disable_error_reporting(void)
 {
         int i;
 
@@ -1663,12 +1687,12 @@ static int mce_disable(void)
 
 static int mce_suspend(struct sys_device *dev, pm_message_t state)
 {
-        return mce_disable();
+        return mce_disable_error_reporting();
 }
 
 static int mce_shutdown(struct sys_device *dev)
 {
-        return mce_disable();
+        return mce_disable_error_reporting();
 }
 
 /*
@@ -1678,8 +1702,8 @@ static int mce_shutdown(struct sys_device *dev)
  */
 static int mce_resume(struct sys_device *dev)
 {
-        mce_init();
-        mce_cpu_features(&current_cpu_data);
+        __mcheck_cpu_init_generic();
+        __mcheck_cpu_init_vendor(&current_cpu_data);
 
         return 0;
 }
@@ -1689,8 +1713,8 @@ static void mce_cpu_restart(void *data)
         del_timer_sync(&__get_cpu_var(mce_timer));
         if (!mce_available(&current_cpu_data))
                 return;
-        mce_init();
-        mce_init_timer();
+        __mcheck_cpu_init_generic();
+        __mcheck_cpu_init_timer();
 }
 
 /* Reinit MCEs after user configuration changes */
@@ -1716,7 +1740,7 @@ static void mce_enable_ce(void *all)
         cmci_reenable();
         cmci_recheck();
         if (all)
-                mce_init_timer();
+                __mcheck_cpu_init_timer();
 }
 
 static struct sysdev_class mce_sysclass = {
@@ -1929,13 +1953,14 @@ static __cpuinit void mce_remove_device(unsigned int cpu)
 }
 
 /* Make sure there are no machine checks on offlined CPUs. */
-static void mce_disable_cpu(void *h)
+static void __cpuinit mce_disable_cpu(void *h)
 {
         unsigned long action = *(unsigned long *)h;
         int i;
 
         if (!mce_available(&current_cpu_data))
                 return;
+
         if (!(action & CPU_TASKS_FROZEN))
                 cmci_clear();
         for (i = 0; i < banks; i++) {
@@ -1946,7 +1971,7 @@ static void mce_disable_cpu(void *h)
         }
 }
 
-static void mce_reenable_cpu(void *h)
+static void __cpuinit mce_reenable_cpu(void *h)
 {
         unsigned long action = *(unsigned long *)h;
         int i;
@@ -2025,7 +2050,7 @@ static __init void mce_init_banks(void)
         }
 }
 
-static __init int mce_init_device(void)
+static __init int mcheck_init_device(void)
 {
         int err;
         int i = 0;
@@ -2053,7 +2078,7 @@ static __init int mce_init_device(void)
         return err;
 }
 
-device_initcall(mce_init_device);
+device_initcall(mcheck_init_device);
 
 /*
  * Old style boot options parsing. Only for compatibility.
@@ -2101,7 +2126,7 @@ static int fake_panic_set(void *data, u64 val)
 DEFINE_SIMPLE_ATTRIBUTE(fake_panic_fops, fake_panic_get,
                         fake_panic_set, "%llu\n");
 
-static int __init mce_debugfs_init(void)
+static int __init mcheck_debugfs_init(void)
 {
         struct dentry *dmce, *ffake_panic;
 
@@ -2115,5 +2140,5 @@ static int __init mce_debugfs_init(void)
 
         return 0;
 }
-late_initcall(mce_debugfs_init);
+late_initcall(mcheck_debugfs_init);
 #endif
diff --git a/arch/x86/kernel/cpu/mcheck/therm_throt.c b/arch/x86/kernel/cpu/mcheck/therm_throt.c
index b3a1dba75330..4fef985fc221 100644
--- a/arch/x86/kernel/cpu/mcheck/therm_throt.c
+++ b/arch/x86/kernel/cpu/mcheck/therm_throt.c
@@ -49,6 +49,8 @@ static DEFINE_PER_CPU(struct thermal_state, thermal_state);
 
 static atomic_t therm_throt_en  = ATOMIC_INIT(0);
 
+static u32 lvtthmr_init __read_mostly;
+
 #ifdef CONFIG_SYSFS
 #define define_therm_throt_sysdev_one_ro(_name)                         \
         static SYSDEV_ATTR(_name, 0444, therm_throt_sysdev_show_##_name, NULL)
@@ -254,6 +256,18 @@ asmlinkage void smp_thermal_interrupt(struct pt_regs *regs)
         ack_APIC_irq();
 }
 
+void __init mcheck_intel_therm_init(void)
+{
+        /*
+         * This function is only called on boot CPU. Save the init thermal
+         * LVT value on BSP and use that value to restore APs' thermal LVT
+         * entry BIOS programmed later
+         */
+        if (cpu_has(&boot_cpu_data, X86_FEATURE_ACPI) &&
+                cpu_has(&boot_cpu_data, X86_FEATURE_ACC))
+                lvtthmr_init = apic_read(APIC_LVTTHMR);
+}
+
 void intel_init_thermal(struct cpuinfo_x86 *c)
 {
         unsigned int cpu = smp_processor_id();
@@ -270,7 +284,20 @@ void intel_init_thermal(struct cpuinfo_x86 *c)
          * since it might be delivered via SMI already:
          */
         rdmsr(MSR_IA32_MISC_ENABLE, l, h);
-        h = apic_read(APIC_LVTTHMR);
+
+        /*
+         * The initial value of thermal LVT entries on all APs always reads
+         * 0x10000 because APs are woken up by BSP issuing INIT-SIPI-SIPI
+         * sequence to them and LVT registers are reset to 0s except for
+         * the mask bits which are set to 1s when APs receive INIT IPI.
+         * Always restore the value that BIOS has programmed on AP based on
+         * BSP's info we saved since BIOS is always setting the same value
+         * for all threads/cores
+         */
+        apic_write(APIC_LVTTHMR, lvtthmr_init);
+
+        h = lvtthmr_init;
+
         if ((l & MSR_IA32_MISC_ENABLE_TM1) && (h & APIC_DM_SMI)) {
                 printk(KERN_DEBUG
                        "CPU%d: Thermal monitoring handled by SMI\n", cpu);