diff --git a/arch/x86/include/asm/hardirq.h b/arch/x86/include/asm/hardirq.h index 82e3e8f010439c..108eb6fd1ae7f6 100644 --- a/arch/x86/include/asm/hardirq.h +++ b/arch/x86/include/asm/hardirq.h @@ -20,11 +20,11 @@ typedef struct { unsigned int irq_call_count; unsigned int irq_tlb_count; #endif -#ifdef CONFIG_X86_MCE +#ifdef CONFIG_X86_THERMAL_VECTOR unsigned int irq_thermal_count; -# ifdef CONFIG_X86_MCE_THRESHOLD +#endif +#ifdef CONFIG_X86_MCE_THRESHOLD unsigned int irq_threshold_count; -# endif #endif } ____cacheline_aligned irq_cpustat_t; diff --git a/arch/x86/include/asm/mce.h b/arch/x86/include/asm/mce.h index f1363b72364f3e..858baa061cfce3 100644 --- a/arch/x86/include/asm/mce.h +++ b/arch/x86/include/asm/mce.h @@ -108,6 +108,8 @@ struct mce_log { #define K8_MCE_THRESHOLD_BANK_5 (MCE_THRESHOLD_BASE + 5 * 9) #define K8_MCE_THRESHOLD_DRAM_ECC (MCE_THRESHOLD_BANK_4 + 0) +extern struct atomic_notifier_head x86_mce_decoder_chain; + #ifdef __KERNEL__ #include @@ -118,9 +120,11 @@ extern int mce_disabled; extern int mce_p5_enabled; #ifdef CONFIG_X86_MCE -void mcheck_init(struct cpuinfo_x86 *c); +int mcheck_init(void); +void mcheck_cpu_init(struct cpuinfo_x86 *c); #else -static inline void mcheck_init(struct cpuinfo_x86 *c) {} +static inline int mcheck_init(void) { return 0; } +static inline void mcheck_cpu_init(struct cpuinfo_x86 *c) {} #endif #ifdef CONFIG_X86_ANCIENT_MCE @@ -214,5 +218,11 @@ void intel_init_thermal(struct cpuinfo_x86 *c); void mce_log_therm_throt_event(__u64 status); +#ifdef CONFIG_X86_THERMAL_VECTOR +extern void mcheck_intel_therm_init(void); +#else +static inline void mcheck_intel_therm_init(void) { } +#endif + #endif /* __KERNEL__ */ #endif /* _ASM_X86_MCE_H */ diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c index cc25c2b4a567c2..9053be5d95cd4f 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 721a77ca811536..0bcaa3875863aa 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 + 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(¤t_cpu_data); + __mcheck_cpu_init_generic(); + __mcheck_cpu_init_vendor(¤t_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(¤t_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(¤t_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 b3a1dba75330a4..4fef985fc22162 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); diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c index 04bbd52785688c..19212cb0155810 100644 --- a/arch/x86/kernel/irq.c +++ b/arch/x86/kernel/irq.c @@ -92,17 +92,17 @@ static int show_other_interrupts(struct seq_file *p, int prec) seq_printf(p, "%10u ", irq_stats(j)->irq_tlb_count); seq_printf(p, " TLB shootdowns\n"); #endif -#ifdef CONFIG_X86_MCE +#ifdef CONFIG_X86_THERMAL_VECTOR seq_printf(p, "%*s: ", prec, "TRM"); for_each_online_cpu(j) seq_printf(p, "%10u ", irq_stats(j)->irq_thermal_count); seq_printf(p, " Thermal event interrupts\n"); -# ifdef CONFIG_X86_MCE_THRESHOLD +#endif +#ifdef CONFIG_X86_MCE_THRESHOLD seq_printf(p, "%*s: ", prec, "THR"); for_each_online_cpu(j) seq_printf(p, "%10u ", irq_stats(j)->irq_threshold_count); seq_printf(p, " Threshold APIC interrupts\n"); -# endif #endif #ifdef CONFIG_X86_MCE seq_printf(p, "%*s: ", prec, "MCE"); @@ -194,11 +194,11 @@ u64 arch_irq_stat_cpu(unsigned int cpu) sum += irq_stats(cpu)->irq_call_count; sum += irq_stats(cpu)->irq_tlb_count; #endif -#ifdef CONFIG_X86_MCE +#ifdef CONFIG_X86_THERMAL_VECTOR sum += irq_stats(cpu)->irq_thermal_count; -# ifdef CONFIG_X86_MCE_THRESHOLD +#endif +#ifdef CONFIG_X86_MCE_THRESHOLD sum += irq_stats(cpu)->irq_threshold_count; -# endif #endif #ifdef CONFIG_X86_MCE sum += per_cpu(mce_exception_count, cpu); diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index 2a34f9c5be214f..c0ca8f921c91f2 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -109,6 +109,7 @@ #ifdef CONFIG_X86_64 #include #endif +#include /* * end_pfn only includes RAM, while max_pfn_mapped includes all e820 entries. @@ -1031,6 +1032,8 @@ void __init setup_arch(char **cmdline_p) #endif #endif x86_init.oem.banner(); + + mcheck_init(); } #ifdef CONFIG_X86_32 diff --git a/drivers/edac/edac_mce_amd.c b/drivers/edac/edac_mce_amd.c index 713ed7d372475d..689cc6a6214df3 100644 --- a/drivers/edac/edac_mce_amd.c +++ b/drivers/edac/edac_mce_amd.c @@ -3,7 +3,6 @@ static bool report_gart_errors; static void (*nb_bus_decoder)(int node_id, struct err_regs *regs); -static void (*orig_mce_callback)(struct mce *m); void amd_report_gart_errors(bool v) { @@ -363,8 +362,10 @@ static inline void amd_decode_err_code(unsigned int ec) pr_warning("Huh? Unknown MCE error 0x%x\n", ec); } -static void amd_decode_mce(struct mce *m) +static int amd_decode_mce(struct notifier_block *nb, unsigned long val, + void *data) { + struct mce *m = (struct mce *)data; struct err_regs regs; int node, ecc; @@ -420,20 +421,22 @@ static void amd_decode_mce(struct mce *m) } amd_decode_err_code(m->status & 0xffff); + + return NOTIFY_STOP; } +static struct notifier_block amd_mce_dec_nb = { + .notifier_call = amd_decode_mce, +}; + static int __init mce_amd_init(void) { /* * We can decode MCEs for Opteron and later CPUs: */ if ((boot_cpu_data.x86_vendor == X86_VENDOR_AMD) && - (boot_cpu_data.x86 >= 0xf)) { - /* safe the default decode mce callback */ - orig_mce_callback = x86_mce_decode_callback; - - x86_mce_decode_callback = amd_decode_mce; - } + (boot_cpu_data.x86 >= 0xf)) + atomic_notifier_chain_register(&x86_mce_decoder_chain, &amd_mce_dec_nb); return 0; } @@ -442,7 +445,7 @@ early_initcall(mce_amd_init); #ifdef MODULE static void __exit mce_amd_exit(void) { - x86_mce_decode_callback = orig_mce_callback; + atomic_notifier_chain_unregister(&x86_mce_decoder_chain, &amd_mce_dec_nb); } MODULE_DESCRIPTION("AMD MCE decoder"); diff --git a/include/trace/events/mce.h b/include/trace/events/mce.h new file mode 100644 index 00000000000000..7eee77895cb374 --- /dev/null +++ b/include/trace/events/mce.h @@ -0,0 +1,69 @@ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM mce + +#if !defined(_TRACE_MCE_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_MCE_H + +#include +#include +#include + +TRACE_EVENT(mce_record, + + TP_PROTO(struct mce *m), + + TP_ARGS(m), + + TP_STRUCT__entry( + __field( u64, mcgcap ) + __field( u64, mcgstatus ) + __field( u8, bank ) + __field( u64, status ) + __field( u64, addr ) + __field( u64, misc ) + __field( u64, ip ) + __field( u8, cs ) + __field( u64, tsc ) + __field( u64, walltime ) + __field( u32, cpu ) + __field( u32, cpuid ) + __field( u32, apicid ) + __field( u32, socketid ) + __field( u8, cpuvendor ) + ), + + TP_fast_assign( + __entry->mcgcap = m->mcgcap; + __entry->mcgstatus = m->mcgstatus; + __entry->bank = m->bank; + __entry->status = m->status; + __entry->addr = m->addr; + __entry->misc = m->misc; + __entry->ip = m->ip; + __entry->cs = m->cs; + __entry->tsc = m->tsc; + __entry->walltime = m->time; + __entry->cpu = m->extcpu; + __entry->cpuid = m->cpuid; + __entry->apicid = m->apicid; + __entry->socketid = m->socketid; + __entry->cpuvendor = m->cpuvendor; + ), + + TP_printk("CPU: %d, MCGc/s: %llx/%llx, MC%d: %016Lx, ADDR/MISC: %016Lx/%016Lx, RIP: %02x:<%016Lx>, TSC: %llx, PROCESSOR: %u:%x, TIME: %llu, SOCKET: %u, APIC: %x", + __entry->cpu, + __entry->mcgcap, __entry->mcgstatus, + __entry->bank, __entry->status, + __entry->addr, __entry->misc, + __entry->cs, __entry->ip, + __entry->tsc, + __entry->cpuvendor, __entry->cpuid, + __entry->walltime, + __entry->socketid, + __entry->apicid) +); + +#endif /* _TRACE_MCE_H */ + +/* This part must be outside protection */ +#include