diff --git a/arch/x86/include/asm/mce.h b/arch/x86/include/asm/mce.h index 3b9970117a0f..4543cf2eb5e8 100644 --- a/arch/x86/include/asm/mce.h +++ b/arch/x86/include/asm/mce.h @@ -61,6 +61,7 @@ * - TCC bit is present in MCx_STATUS. */ #define MCI_CONFIG_MCAX 0x1 +#define MCI_CONFIG_FRUTEXT BIT_ULL(9) #define MCI_IPID_MCATYPE 0xFFFF0000 #define MCI_IPID_HWID 0xFFF @@ -122,6 +123,9 @@ #define MSR_AMD64_SMCA_MC0_DESTAT 0xc0002008 #define MSR_AMD64_SMCA_MC0_DEADDR 0xc0002009 #define MSR_AMD64_SMCA_MC0_MISC1 0xc000200a +/* Registers MISC2 to MISC4 are at offsets B to D. */ +#define MSR_AMD64_SMCA_MC0_SYND1 0xc000200e +#define MSR_AMD64_SMCA_MC0_SYND2 0xc000200f #define MSR_AMD64_SMCA_MCx_CTL(x) (MSR_AMD64_SMCA_MC0_CTL + 0x10*(x)) #define MSR_AMD64_SMCA_MCx_STATUS(x) (MSR_AMD64_SMCA_MC0_STATUS + 0x10*(x)) #define MSR_AMD64_SMCA_MCx_ADDR(x) (MSR_AMD64_SMCA_MC0_ADDR + 0x10*(x)) @@ -132,6 +136,8 @@ #define MSR_AMD64_SMCA_MCx_DESTAT(x) (MSR_AMD64_SMCA_MC0_DESTAT + 0x10*(x)) #define MSR_AMD64_SMCA_MCx_DEADDR(x) (MSR_AMD64_SMCA_MC0_DEADDR + 0x10*(x)) #define MSR_AMD64_SMCA_MCx_MISCy(x, y) ((MSR_AMD64_SMCA_MC0_MISC1 + y) + (0x10*(x))) +#define MSR_AMD64_SMCA_MCx_SYND1(x) (MSR_AMD64_SMCA_MC0_SYND1 + 0x10*(x)) +#define MSR_AMD64_SMCA_MCx_SYND2(x) (MSR_AMD64_SMCA_MC0_SYND2 + 0x10*(x)) #define XEC(x, mask) (((x) >> 16) & mask) @@ -187,6 +193,32 @@ enum mce_notifier_prios { MCE_PRIO_HIGHEST = MCE_PRIO_CEC }; +/** + * struct mce_hw_err - Hardware Error Record. + * @m: Machine Check record. + * @vendor: Vendor-specific error information. + * + * Vendor-specific fields should not be added to struct mce. Instead, vendors + * should export their vendor-specific data through their structure in the + * vendor union below. + * + * AMD's vendor data is parsed by error decoding tools for supplemental error + * information. Thus, current offsets of existing fields must be maintained. + * Only add new fields at the end of AMD's vendor structure. + */ +struct mce_hw_err { + struct mce m; + + union vendor_info { + struct { + u64 synd1; /* MCA_SYND1 MSR */ + u64 synd2; /* MCA_SYND2 MSR */ + } amd; + } vendor; +}; + +#define to_mce_hw_err(mce) container_of(mce, struct mce_hw_err, m) + struct notifier_block; extern void mce_register_decode_chain(struct notifier_block *nb); extern void mce_unregister_decode_chain(struct notifier_block *nb); @@ -221,8 +253,8 @@ static inline int apei_smca_report_x86_error(struct cper_ia_proc_ctx *ctx_info, u64 lapic_id) { return -EINVAL; } #endif -void mce_prep_record(struct mce *m); -void mce_log(struct mce *m); +void mce_prep_record(struct mce_hw_err *err); +void mce_log(struct mce_hw_err *err); DECLARE_PER_CPU(struct device *, mce_device); /* Maximum number of MCA banks per CPU. */ diff --git a/arch/x86/include/uapi/asm/mce.h b/arch/x86/include/uapi/asm/mce.h index db9adc081c5a..cb6b48a7c22b 100644 --- a/arch/x86/include/uapi/asm/mce.h +++ b/arch/x86/include/uapi/asm/mce.h @@ -8,7 +8,8 @@ /* * Fields are zero when not available. Also, this struct is shared with * userspace mcelog and thus must keep existing fields at current offsets. - * Only add new fields to the end of the structure + * Only add new, shared fields to the end of the structure. + * Do not add vendor-specific fields. */ struct mce { __u64 status; /* Bank's MCi_STATUS MSR */ diff --git a/arch/x86/kernel/cpu/mce/amd.c b/arch/x86/kernel/cpu/mce/amd.c index 14bf8c232e45..6ca80fff1fea 100644 --- a/arch/x86/kernel/cpu/mce/amd.c +++ b/arch/x86/kernel/cpu/mce/amd.c @@ -778,29 +778,33 @@ bool amd_mce_usable_address(struct mce *m) static void __log_error(unsigned int bank, u64 status, u64 addr, u64 misc) { - struct mce m; + struct mce_hw_err err; + struct mce *m = &err.m; - mce_prep_record(&m); + mce_prep_record(&err); - m.status = status; - m.misc = misc; - m.bank = bank; - m.tsc = rdtsc(); + m->status = status; + m->misc = misc; + m->bank = bank; + m->tsc = rdtsc(); - if (m.status & MCI_STATUS_ADDRV) { - m.addr = addr; + if (m->status & MCI_STATUS_ADDRV) { + m->addr = addr; - smca_extract_err_addr(&m); + smca_extract_err_addr(m); } if (mce_flags.smca) { - rdmsrl(MSR_AMD64_SMCA_MCx_IPID(bank), m.ipid); + rdmsrl(MSR_AMD64_SMCA_MCx_IPID(bank), m->ipid); - if (m.status & MCI_STATUS_SYNDV) - rdmsrl(MSR_AMD64_SMCA_MCx_SYND(bank), m.synd); + if (m->status & MCI_STATUS_SYNDV) { + rdmsrl(MSR_AMD64_SMCA_MCx_SYND(bank), m->synd); + rdmsrl(MSR_AMD64_SMCA_MCx_SYND1(bank), err.vendor.amd.synd1); + rdmsrl(MSR_AMD64_SMCA_MCx_SYND2(bank), err.vendor.amd.synd2); + } } - mce_log(&m); + mce_log(&err); } DEFINE_IDTENTRY_SYSVEC(sysvec_deferred_error) diff --git a/arch/x86/kernel/cpu/mce/apei.c b/arch/x86/kernel/cpu/mce/apei.c index 3885fe05f01e..0a89947e47bc 100644 --- a/arch/x86/kernel/cpu/mce/apei.c +++ b/arch/x86/kernel/cpu/mce/apei.c @@ -28,7 +28,8 @@ void apei_mce_report_mem_error(int severity, struct cper_sec_mem_err *mem_err) { - struct mce m; + struct mce_hw_err err; + struct mce *m; int lsb; if (!(mem_err->validation_bits & CPER_MEM_VALID_PA)) @@ -44,31 +45,33 @@ void apei_mce_report_mem_error(int severity, struct cper_sec_mem_err *mem_err) else lsb = PAGE_SHIFT; - mce_prep_record(&m); - m.bank = -1; + mce_prep_record(&err); + m = &err.m; + m->bank = -1; /* Fake a memory read error with unknown channel */ - m.status = MCI_STATUS_VAL | MCI_STATUS_EN | MCI_STATUS_ADDRV | MCI_STATUS_MISCV | 0x9f; - m.misc = (MCI_MISC_ADDR_PHYS << 6) | lsb; + m->status = MCI_STATUS_VAL | MCI_STATUS_EN | MCI_STATUS_ADDRV | MCI_STATUS_MISCV | 0x9f; + m->misc = (MCI_MISC_ADDR_PHYS << 6) | lsb; if (severity >= GHES_SEV_RECOVERABLE) - m.status |= MCI_STATUS_UC; + m->status |= MCI_STATUS_UC; if (severity >= GHES_SEV_PANIC) { - m.status |= MCI_STATUS_PCC; - m.tsc = rdtsc(); + m->status |= MCI_STATUS_PCC; + m->tsc = rdtsc(); } - m.addr = mem_err->physical_addr; - mce_log(&m); + m->addr = mem_err->physical_addr; + mce_log(&err); } EXPORT_SYMBOL_GPL(apei_mce_report_mem_error); int apei_smca_report_x86_error(struct cper_ia_proc_ctx *ctx_info, u64 lapic_id) { const u64 *i_mce = ((const u64 *) (ctx_info + 1)); + unsigned int cpu, num_regs; bool apicid_found = false; - unsigned int cpu; - struct mce m; + struct mce_hw_err err; + struct mce *m; if (!boot_cpu_has(X86_FEATURE_SMCA)) return -EINVAL; @@ -86,16 +89,12 @@ int apei_smca_report_x86_error(struct cper_ia_proc_ctx *ctx_info, u64 lapic_id) return -EINVAL; /* - * The register array size must be large enough to include all the - * SMCA registers which need to be extracted. - * * The number of registers in the register array is determined by * Register Array Size/8 as defined in UEFI spec v2.8, sec N.2.4.2.2. - * The register layout is fixed and currently the raw data in the - * register array includes 6 SMCA registers which the kernel can - * extract. + * Sanity-check registers array size. */ - if (ctx_info->reg_arr_size < 48) + num_regs = ctx_info->reg_arr_size >> 3; + if (!num_regs) return -EINVAL; for_each_possible_cpu(cpu) { @@ -108,18 +107,68 @@ int apei_smca_report_x86_error(struct cper_ia_proc_ctx *ctx_info, u64 lapic_id) if (!apicid_found) return -EINVAL; - mce_prep_record_common(&m); - mce_prep_record_per_cpu(cpu, &m); + m = &err.m; + memset(&err, 0, sizeof(struct mce_hw_err)); + mce_prep_record_common(m); + mce_prep_record_per_cpu(cpu, m); - m.bank = (ctx_info->msr_addr >> 4) & 0xFF; - m.status = *i_mce; - m.addr = *(i_mce + 1); - m.misc = *(i_mce + 2); - /* Skipping MCA_CONFIG */ - m.ipid = *(i_mce + 4); - m.synd = *(i_mce + 5); + m->bank = (ctx_info->msr_addr >> 4) & 0xFF; - mce_log(&m); + /* + * The SMCA register layout is fixed and includes 16 registers. + * The end of the array may be variable, but the beginning is known. + * Cap the number of registers to expected max (15). + */ + if (num_regs > 15) + num_regs = 15; + + switch (num_regs) { + /* MCA_SYND2 */ + case 15: + err.vendor.amd.synd2 = *(i_mce + 14); + fallthrough; + /* MCA_SYND1 */ + case 14: + err.vendor.amd.synd1 = *(i_mce + 13); + fallthrough; + /* MCA_MISC4 */ + case 13: + /* MCA_MISC3 */ + case 12: + /* MCA_MISC2 */ + case 11: + /* MCA_MISC1 */ + case 10: + /* MCA_DEADDR */ + case 9: + /* MCA_DESTAT */ + case 8: + /* reserved */ + case 7: + /* MCA_SYND */ + case 6: + m->synd = *(i_mce + 5); + fallthrough; + /* MCA_IPID */ + case 5: + m->ipid = *(i_mce + 4); + fallthrough; + /* MCA_CONFIG */ + case 4: + /* MCA_MISC0 */ + case 3: + m->misc = *(i_mce + 2); + fallthrough; + /* MCA_ADDR */ + case 2: + m->addr = *(i_mce + 1); + fallthrough; + /* MCA_STATUS */ + case 1: + m->status = *i_mce; + } + + mce_log(&err); return 0; } diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c index 2a938f429c4d..7fb5556a0b53 100644 --- a/arch/x86/kernel/cpu/mce/core.c +++ b/arch/x86/kernel/cpu/mce/core.c @@ -88,7 +88,7 @@ struct mca_config mca_cfg __read_mostly = { .monarch_timeout = -1 }; -static DEFINE_PER_CPU(struct mce, mces_seen); +static DEFINE_PER_CPU(struct mce_hw_err, hw_errs_seen); static unsigned long mce_need_notify; /* @@ -119,8 +119,6 @@ BLOCKING_NOTIFIER_HEAD(x86_mce_decoder_chain); void mce_prep_record_common(struct mce *m) { - memset(m, 0, sizeof(struct mce)); - m->cpuid = cpuid_eax(1); m->cpuvendor = boot_cpu_data.x86_vendor; m->mcgcap = __rdmsr(MSR_IA32_MCG_CAP); @@ -138,9 +136,12 @@ void mce_prep_record_per_cpu(unsigned int cpu, struct mce *m) m->socketid = topology_physical_package_id(cpu); } -/* Do initial initialization of a struct mce */ -void mce_prep_record(struct mce *m) +/* Do initial initialization of struct mce_hw_err */ +void mce_prep_record(struct mce_hw_err *err) { + struct mce *m = &err->m; + + memset(err, 0, sizeof(struct mce_hw_err)); mce_prep_record_common(m); mce_prep_record_per_cpu(smp_processor_id(), m); } @@ -148,9 +149,9 @@ void mce_prep_record(struct mce *m) DEFINE_PER_CPU(struct mce, injectm); EXPORT_PER_CPU_SYMBOL_GPL(injectm); -void mce_log(struct mce *m) +void mce_log(struct mce_hw_err *err) { - if (!mce_gen_pool_add(m)) + if (!mce_gen_pool_add(err)) irq_work_queue(&mce_irq_work); } EXPORT_SYMBOL_GPL(mce_log); @@ -171,8 +172,10 @@ void mce_unregister_decode_chain(struct notifier_block *nb) } EXPORT_SYMBOL_GPL(mce_unregister_decode_chain); -static void __print_mce(struct mce *m) +static void __print_mce(struct mce_hw_err *err) { + struct mce *m = &err->m; + pr_emerg(HW_ERR "CPU %d: Machine Check%s: %Lx Bank %d: %016Lx\n", m->extcpu, (m->mcgstatus & MCG_STATUS_MCIP ? " Exception" : ""), @@ -199,6 +202,10 @@ static void __print_mce(struct mce *m) if (mce_flags.smca) { if (m->synd) pr_cont("SYND %llx ", m->synd); + if (err->vendor.amd.synd1) + pr_cont("SYND1 %llx ", err->vendor.amd.synd1); + if (err->vendor.amd.synd2) + pr_cont("SYND2 %llx ", err->vendor.amd.synd2); if (m->ipid) pr_cont("IPID %llx ", m->ipid); } @@ -214,9 +221,11 @@ static void __print_mce(struct mce *m) m->microcode); } -static void print_mce(struct mce *m) +static void print_mce(struct mce_hw_err *err) { - __print_mce(m); + struct mce *m = &err->m; + + __print_mce(err); if (m->cpuvendor != X86_VENDOR_AMD && m->cpuvendor != X86_VENDOR_HYGON) pr_emerg_ratelimited(HW_ERR "Run the above through 'mcelog --ascii'\n"); @@ -251,7 +260,7 @@ static const char *mce_dump_aux_info(struct mce *m) return NULL; } -static noinstr void mce_panic(const char *msg, struct mce *final, char *exp) +static noinstr void mce_panic(const char *msg, struct mce_hw_err *final, char *exp) { struct llist_node *pending; struct mce_evt_llist *l; @@ -282,20 +291,22 @@ static noinstr void mce_panic(const char *msg, struct mce *final, char *exp) pending = mce_gen_pool_prepare_records(); /* First print corrected ones that are still unlogged */ llist_for_each_entry(l, pending, llnode) { - struct mce *m = &l->mce; + struct mce_hw_err *err = &l->err; + struct mce *m = &err->m; if (!(m->status & MCI_STATUS_UC)) { - print_mce(m); + print_mce(err); if (!apei_err) apei_err = apei_write_mce(m); } } /* Now print uncorrected but with the final one last */ llist_for_each_entry(l, pending, llnode) { - struct mce *m = &l->mce; + struct mce_hw_err *err = &l->err; + struct mce *m = &err->m; if (!(m->status & MCI_STATUS_UC)) continue; - if (!final || mce_cmp(m, final)) { - print_mce(m); + if (!final || mce_cmp(m, &final->m)) { + print_mce(err); if (!apei_err) apei_err = apei_write_mce(m); } @@ -303,12 +314,12 @@ static noinstr void mce_panic(const char *msg, struct mce *final, char *exp) if (final) { print_mce(final); if (!apei_err) - apei_err = apei_write_mce(final); + apei_err = apei_write_mce(&final->m); } if (exp) pr_emerg(HW_ERR "Machine check: %s\n", exp); - memmsg = mce_dump_aux_info(final); + memmsg = mce_dump_aux_info(&final->m); if (memmsg) pr_emerg(HW_ERR "Machine check: %s\n", memmsg); @@ -323,9 +334,9 @@ static noinstr void mce_panic(const char *msg, struct mce *final, char *exp) * panic. */ if (kexec_crash_loaded()) { - if (final && (final->status & MCI_STATUS_ADDRV)) { + if (final && (final->m.status & MCI_STATUS_ADDRV)) { struct page *p; - p = pfn_to_online_page(final->addr >> PAGE_SHIFT); + p = pfn_to_online_page(final->m.addr >> PAGE_SHIFT); if (p) SetPageHWPoison(p); } @@ -445,16 +456,18 @@ static noinstr void mce_wrmsrl(u32 msr, u64 v) * check into our "mce" struct so that we can use it later to assess * the severity of the problem as we read per-bank specific details. */ -static noinstr void mce_gather_info(struct mce *m, struct pt_regs *regs) +static noinstr void mce_gather_info(struct mce_hw_err *err, struct pt_regs *regs) { + struct mce *m; /* * Enable instrumentation around mce_prep_record() which calls external * facilities. */ instrumentation_begin(); - mce_prep_record(m); + mce_prep_record(err); instrumentation_end(); + m = &err->m; m->mcgstatus = mce_rdmsrl(MSR_IA32_MCG_STATUS); if (regs) { /* @@ -574,13 +587,13 @@ EXPORT_SYMBOL_GPL(mce_is_correctable); static int mce_early_notifier(struct notifier_block *nb, unsigned long val, void *data) { - struct mce *m = (struct mce *)data; + struct mce_hw_err *err = to_mce_hw_err(data); - if (!m) + if (!err) return NOTIFY_DONE; /* Emit the trace record: */ - trace_mce_record(m); + trace_mce_record(err); set_bit(0, &mce_need_notify); @@ -624,13 +637,13 @@ static struct notifier_block mce_uc_nb = { static int mce_default_notifier(struct notifier_block *nb, unsigned long val, void *data) { - struct mce *m = (struct mce *)data; + struct mce_hw_err *err = to_mce_hw_err(data); - if (!m) + if (!err) return NOTIFY_DONE; - if (mca_cfg.print_all || !m->kflags) - __print_mce(m); + if (mca_cfg.print_all || !(err->m.kflags)) + __print_mce(err); return NOTIFY_DONE; } @@ -644,8 +657,10 @@ static struct notifier_block mce_default_nb = { /* * Read ADDR and MISC registers. */ -static noinstr void mce_read_aux(struct mce *m, int i) +static noinstr void mce_read_aux(struct mce_hw_err *err, int i) { + struct mce *m = &err->m; + if (m->status & MCI_STATUS_MISCV) m->misc = mce_rdmsrl(mca_msr_reg(i, MCA_MISC)); @@ -667,8 +682,11 @@ static noinstr void mce_read_aux(struct mce *m, int i) if (mce_flags.smca) { m->ipid = mce_rdmsrl(MSR_AMD64_SMCA_MCx_IPID(i)); - if (m->status & MCI_STATUS_SYNDV) + if (m->status & MCI_STATUS_SYNDV) { m->synd = mce_rdmsrl(MSR_AMD64_SMCA_MCx_SYND(i)); + err->vendor.amd.synd1 = mce_rdmsrl(MSR_AMD64_SMCA_MCx_SYND1(i)); + err->vendor.amd.synd2 = mce_rdmsrl(MSR_AMD64_SMCA_MCx_SYND2(i)); + } } } @@ -692,26 +710,28 @@ DEFINE_PER_CPU(unsigned, mce_poll_count); void machine_check_poll(enum mcp_flags flags, mce_banks_t *b) { struct mce_bank *mce_banks = this_cpu_ptr(mce_banks_array); - struct mce m; + struct mce_hw_err err; + struct mce *m; int i; this_cpu_inc(mce_poll_count); - mce_gather_info(&m, NULL); + mce_gather_info(&err, NULL); + m = &err.m; if (flags & MCP_TIMESTAMP) - m.tsc = rdtsc(); + m->tsc = rdtsc(); for (i = 0; i < this_cpu_read(mce_num_banks); i++) { if (!mce_banks[i].ctl || !test_bit(i, *b)) continue; - m.misc = 0; - m.addr = 0; - m.bank = i; + m->misc = 0; + m->addr = 0; + m->bank = i; barrier(); - m.status = mce_rdmsrl(mca_msr_reg(i, MCA_STATUS)); + m->status = mce_rdmsrl(mca_msr_reg(i, MCA_STATUS)); /* * Update storm tracking here, before checking for the @@ -721,17 +741,17 @@ void machine_check_poll(enum mcp_flags flags, mce_banks_t *b) * storm status. */ if (!mca_cfg.cmci_disabled) - mce_track_storm(&m); + mce_track_storm(m); /* If this entry is not valid, ignore it */ - if (!(m.status & MCI_STATUS_VAL)) + if (!(m->status & MCI_STATUS_VAL)) continue; /* * If we are logging everything (at CPU online) or this * is a corrected error, then we must log it. */ - if ((flags & MCP_UC) || !(m.status & MCI_STATUS_UC)) + if ((flags & MCP_UC) || !(m->status & MCI_STATUS_UC)) goto log_it; /* @@ -741,20 +761,20 @@ void machine_check_poll(enum mcp_flags flags, mce_banks_t *b) * everything else. */ if (!mca_cfg.ser) { - if (m.status & MCI_STATUS_UC) + if (m->status & MCI_STATUS_UC) continue; goto log_it; } /* Log "not enabled" (speculative) errors */ - if (!(m.status & MCI_STATUS_EN)) + if (!(m->status & MCI_STATUS_EN)) goto log_it; /* * Log UCNA (SDM: 15.6.3 "UCR Error Classification") * UC == 1 && PCC == 0 && S == 0 */ - if (!(m.status & MCI_STATUS_PCC) && !(m.status & MCI_STATUS_S)) + if (!(m->status & MCI_STATUS_PCC) && !(m->status & MCI_STATUS_S)) goto log_it; /* @@ -768,20 +788,20 @@ log_it: if (flags & MCP_DONTLOG) goto clear_it; - mce_read_aux(&m, i); - m.severity = mce_severity(&m, NULL, NULL, false); + mce_read_aux(&err, i); + m->severity = mce_severity(m, NULL, NULL, false); /* * Don't get the IP here because it's unlikely to * have anything to do with the actual error location. */ - if (mca_cfg.dont_log_ce && !mce_usable_address(&m)) + if (mca_cfg.dont_log_ce && !mce_usable_address(m)) goto clear_it; if (flags & MCP_QUEUE_LOG) - mce_gen_pool_add(&m); + mce_gen_pool_add(&err); else - mce_log(&m); + mce_log(&err); clear_it: /* @@ -905,9 +925,10 @@ static __always_inline void quirk_zen_ifu(int bank, struct mce *m, struct pt_reg * Do a quick check if any of the events requires a panic. * This decides if we keep the events around or clear them. */ -static __always_inline int mce_no_way_out(struct mce *m, char **msg, unsigned long *validp, +static __always_inline int mce_no_way_out(struct mce_hw_err *err, char **msg, unsigned long *validp, struct pt_regs *regs) { + struct mce *m = &err->m; char *tmp = *msg; int i; @@ -925,7 +946,7 @@ static __always_inline int mce_no_way_out(struct mce *m, char **msg, unsigned lo m->bank = i; if (mce_severity(m, regs, &tmp, true) >= MCE_PANIC_SEVERITY) { - mce_read_aux(m, i); + mce_read_aux(err, i); *msg = tmp; return 1; } @@ -1016,10 +1037,11 @@ out: */ static void mce_reign(void) { - int cpu; + struct mce_hw_err *err = NULL; struct mce *m = NULL; int global_worst = 0; char *msg = NULL; + int cpu; /* * This CPU is the Monarch and the other CPUs have run @@ -1027,11 +1049,13 @@ static void mce_reign(void) * Grade the severity of the errors of all the CPUs. */ for_each_possible_cpu(cpu) { - struct mce *mtmp = &per_cpu(mces_seen, cpu); + struct mce_hw_err *etmp = &per_cpu(hw_errs_seen, cpu); + struct mce *mtmp = &etmp->m; if (mtmp->severity > global_worst) { global_worst = mtmp->severity; - m = &per_cpu(mces_seen, cpu); + err = &per_cpu(hw_errs_seen, cpu); + m = &err->m; } } @@ -1043,7 +1067,7 @@ static void mce_reign(void) if (m && global_worst >= MCE_PANIC_SEVERITY) { /* call mce_severity() to get "msg" for panic */ mce_severity(m, NULL, &msg, true); - mce_panic("Fatal machine check", m, msg); + mce_panic("Fatal machine check", err, msg); } /* @@ -1060,11 +1084,11 @@ static void mce_reign(void) mce_panic("Fatal machine check from unknown source", NULL, NULL); /* - * Now clear all the mces_seen so that they don't reappear on + * Now clear all the hw_errs_seen so that they don't reappear on * the next mce. */ for_each_possible_cpu(cpu) - memset(&per_cpu(mces_seen, cpu), 0, sizeof(struct mce)); + memset(&per_cpu(hw_errs_seen, cpu), 0, sizeof(struct mce_hw_err)); } static atomic_t global_nwo; @@ -1268,13 +1292,14 @@ static noinstr bool mce_check_crashing_cpu(void) } static __always_inline int -__mc_scan_banks(struct mce *m, struct pt_regs *regs, struct mce *final, - unsigned long *toclear, unsigned long *valid_banks, int no_way_out, - int *worst) +__mc_scan_banks(struct mce_hw_err *err, struct pt_regs *regs, + struct mce_hw_err *final, unsigned long *toclear, + unsigned long *valid_banks, int no_way_out, int *worst) { struct mce_bank *mce_banks = this_cpu_ptr(mce_banks_array); struct mca_config *cfg = &mca_cfg; int severity, i, taint = 0; + struct mce *m = &err->m; for (i = 0; i < this_cpu_read(mce_num_banks); i++) { arch___clear_bit(i, toclear); @@ -1319,7 +1344,7 @@ __mc_scan_banks(struct mce *m, struct pt_regs *regs, struct mce *final, if (severity == MCE_NO_SEVERITY) continue; - mce_read_aux(m, i); + mce_read_aux(err, i); /* assuming valid severity level != 0 */ m->severity = severity; @@ -1329,17 +1354,17 @@ __mc_scan_banks(struct mce *m, struct pt_regs *regs, struct mce *final, * done in #MC context, where instrumentation is disabled. */ instrumentation_begin(); - mce_log(m); + mce_log(err); instrumentation_end(); if (severity > *worst) { - *final = *m; + *final = *err; *worst = severity; } } /* mce_clear_state will clear *final, save locally for use later */ - *m = *final; + *err = *final; return taint; } @@ -1399,9 +1424,10 @@ static void kill_me_never(struct callback_head *cb) set_mce_nospec(pfn); } -static void queue_task_work(struct mce *m, char *msg, void (*func)(struct callback_head *)) +static void queue_task_work(struct mce_hw_err *err, char *msg, void (*func)(struct callback_head *)) { int count = ++current->mce_count; + struct mce *m = &err->m; /* First call, save all the details */ if (count == 1) { @@ -1414,11 +1440,12 @@ static void queue_task_work(struct mce *m, char *msg, void (*func)(struct callba /* Ten is likely overkill. Don't expect more than two faults before task_work() */ if (count > 10) - mce_panic("Too many consecutive machine checks while accessing user data", m, msg); + mce_panic("Too many consecutive machine checks while accessing user data", + err, msg); /* Second or later call, make sure page address matches the one from first call */ if (count > 1 && (current->mce_addr >> PAGE_SHIFT) != (m->addr >> PAGE_SHIFT)) - mce_panic("Consecutive machine checks to different user pages", m, msg); + mce_panic("Consecutive machine checks to different user pages", err, msg); /* Do not call task_work_add() more than once */ if (count > 1) @@ -1467,8 +1494,10 @@ noinstr void do_machine_check(struct pt_regs *regs) int worst = 0, order, no_way_out, kill_current_task, lmce, taint = 0; DECLARE_BITMAP(valid_banks, MAX_NR_BANKS) = { 0 }; DECLARE_BITMAP(toclear, MAX_NR_BANKS) = { 0 }; - struct mce m, *final; + struct mce_hw_err *final; + struct mce_hw_err err; char *msg = NULL; + struct mce *m; if (unlikely(mce_flags.p5)) return pentium_machine_check(regs); @@ -1506,13 +1535,14 @@ noinstr void do_machine_check(struct pt_regs *regs) this_cpu_inc(mce_exception_count); - mce_gather_info(&m, regs); - m.tsc = rdtsc(); + mce_gather_info(&err, regs); + m = &err.m; + m->tsc = rdtsc(); - final = this_cpu_ptr(&mces_seen); - *final = m; + final = this_cpu_ptr(&hw_errs_seen); + *final = err; - no_way_out = mce_no_way_out(&m, &msg, valid_banks, regs); + no_way_out = mce_no_way_out(&err, &msg, valid_banks, regs); barrier(); @@ -1521,15 +1551,15 @@ noinstr void do_machine_check(struct pt_regs *regs) * Assume the worst for now, but if we find the * severity is MCE_AR_SEVERITY we have other options. */ - if (!(m.mcgstatus & MCG_STATUS_RIPV)) + if (!(m->mcgstatus & MCG_STATUS_RIPV)) kill_current_task = 1; /* * Check if this MCE is signaled to only this logical processor, * on Intel, Zhaoxin only. */ - if (m.cpuvendor == X86_VENDOR_INTEL || - m.cpuvendor == X86_VENDOR_ZHAOXIN) - lmce = m.mcgstatus & MCG_STATUS_LMCES; + if (m->cpuvendor == X86_VENDOR_INTEL || + m->cpuvendor == X86_VENDOR_ZHAOXIN) + lmce = m->mcgstatus & MCG_STATUS_LMCES; /* * Local machine check may already know that we have to panic. @@ -1540,12 +1570,12 @@ noinstr void do_machine_check(struct pt_regs *regs) */ if (lmce) { if (no_way_out) - mce_panic("Fatal local machine check", &m, msg); + mce_panic("Fatal local machine check", &err, msg); } else { order = mce_start(&no_way_out); } - taint = __mc_scan_banks(&m, regs, final, toclear, valid_banks, no_way_out, &worst); + taint = __mc_scan_banks(&err, regs, final, toclear, valid_banks, no_way_out, &worst); if (!no_way_out) mce_clear_state(toclear); @@ -1560,7 +1590,7 @@ noinstr void do_machine_check(struct pt_regs *regs) no_way_out = worst >= MCE_PANIC_SEVERITY; if (no_way_out) - mce_panic("Fatal machine check on current CPU", &m, msg); + mce_panic("Fatal machine check on current CPU", &err, msg); } } else { /* @@ -1572,8 +1602,8 @@ noinstr void do_machine_check(struct pt_regs *regs) * make sure we have the right "msg". */ if (worst >= MCE_PANIC_SEVERITY) { - mce_severity(&m, regs, &msg, true); - mce_panic("Local fatal machine check!", &m, msg); + mce_severity(m, regs, &msg, true); + mce_panic("Local fatal machine check!", &err, msg); } } @@ -1591,16 +1621,16 @@ noinstr void do_machine_check(struct pt_regs *regs) goto out; /* Fault was in user mode and we need to take some action */ - if ((m.cs & 3) == 3) { + if ((m->cs & 3) == 3) { /* If this triggers there is no way to recover. Die hard. */ BUG_ON(!on_thread_stack() || !user_mode(regs)); - if (!mce_usable_address(&m)) - queue_task_work(&m, msg, kill_me_now); + if (!mce_usable_address(m)) + queue_task_work(&err, msg, kill_me_now); else - queue_task_work(&m, msg, kill_me_maybe); + queue_task_work(&err, msg, kill_me_maybe); - } else if (m.mcgstatus & MCG_STATUS_SEAM_NR) { + } else if (m->mcgstatus & MCG_STATUS_SEAM_NR) { /* * Saved RIP on stack makes it look like the machine check * was taken in the kernel on the instruction following @@ -1612,8 +1642,8 @@ noinstr void do_machine_check(struct pt_regs *regs) * not occur there. Mark the page as poisoned so it won't * be added to free list when the guest is terminated. */ - if (mce_usable_address(&m)) { - struct page *p = pfn_to_online_page(m.addr >> PAGE_SHIFT); + if (mce_usable_address(m)) { + struct page *p = pfn_to_online_page(m->addr >> PAGE_SHIFT); if (p) SetPageHWPoison(p); @@ -1628,13 +1658,13 @@ noinstr void do_machine_check(struct pt_regs *regs) * corresponding exception handler which would do that is the * proper one. */ - if (m.kflags & MCE_IN_KERNEL_RECOV) { + if (m->kflags & MCE_IN_KERNEL_RECOV) { if (!fixup_exception(regs, X86_TRAP_MC, 0, 0)) - mce_panic("Failed kernel mode recovery", &m, msg); + mce_panic("Failed kernel mode recovery", &err, msg); } - if (m.kflags & MCE_IN_KERNEL_COPYIN) - queue_task_work(&m, msg, kill_me_never); + if (m->kflags & MCE_IN_KERNEL_COPYIN) + queue_task_work(&err, msg, kill_me_never); } out: diff --git a/arch/x86/kernel/cpu/mce/dev-mcelog.c b/arch/x86/kernel/cpu/mce/dev-mcelog.c index af44fd5dbd7c..8d023239ce18 100644 --- a/arch/x86/kernel/cpu/mce/dev-mcelog.c +++ b/arch/x86/kernel/cpu/mce/dev-mcelog.c @@ -264,15 +264,8 @@ static long mce_chrdev_ioctl(struct file *f, unsigned int cmd, return put_user(sizeof(struct mce), p); case MCE_GET_LOG_LEN: return put_user(mcelog->len, p); - case MCE_GETCLEAR_FLAGS: { - unsigned flags; - - do { - flags = mcelog->flags; - } while (cmpxchg(&mcelog->flags, flags, 0) != flags); - - return put_user(flags, p); - } + case MCE_GETCLEAR_FLAGS: + return put_user(xchg(&mcelog->flags, 0), p); default: return -ENOTTY; } diff --git a/arch/x86/kernel/cpu/mce/genpool.c b/arch/x86/kernel/cpu/mce/genpool.c index 4284749ec803..d0be6dda0c14 100644 --- a/arch/x86/kernel/cpu/mce/genpool.c +++ b/arch/x86/kernel/cpu/mce/genpool.c @@ -31,15 +31,15 @@ static LLIST_HEAD(mce_event_llist); */ static bool is_duplicate_mce_record(struct mce_evt_llist *t, struct mce_evt_llist *l) { + struct mce_hw_err *err1, *err2; struct mce_evt_llist *node; - struct mce *m1, *m2; - m1 = &t->mce; + err1 = &t->err; llist_for_each_entry(node, &l->llnode, llnode) { - m2 = &node->mce; + err2 = &node->err; - if (!mce_cmp(m1, m2)) + if (!mce_cmp(&err1->m, &err2->m)) return true; } return false; @@ -73,8 +73,8 @@ struct llist_node *mce_gen_pool_prepare_records(void) void mce_gen_pool_process(struct work_struct *__unused) { - struct llist_node *head; struct mce_evt_llist *node, *tmp; + struct llist_node *head; struct mce *mce; head = llist_del_all(&mce_event_llist); @@ -83,7 +83,7 @@ void mce_gen_pool_process(struct work_struct *__unused) head = llist_reverse_order(head); llist_for_each_entry_safe(node, tmp, head, llnode) { - mce = &node->mce; + mce = &node->err.m; blocking_notifier_call_chain(&x86_mce_decoder_chain, 0, mce); gen_pool_free(mce_evt_pool, (unsigned long)node, sizeof(*node)); } @@ -94,11 +94,11 @@ bool mce_gen_pool_empty(void) return llist_empty(&mce_event_llist); } -int mce_gen_pool_add(struct mce *mce) +int mce_gen_pool_add(struct mce_hw_err *err) { struct mce_evt_llist *node; - if (filter_mce(mce)) + if (filter_mce(&err->m)) return -EINVAL; if (!mce_evt_pool) @@ -110,7 +110,7 @@ int mce_gen_pool_add(struct mce *mce) return -ENOMEM; } - memcpy(&node->mce, mce, sizeof(*mce)); + memcpy(&node->err, err, sizeof(*err)); llist_add(&node->llnode, &mce_event_llist); return 0; diff --git a/arch/x86/kernel/cpu/mce/inject.c b/arch/x86/kernel/cpu/mce/inject.c index 49ed3428785d..313fe682db33 100644 --- a/arch/x86/kernel/cpu/mce/inject.c +++ b/arch/x86/kernel/cpu/mce/inject.c @@ -502,8 +502,9 @@ static void prepare_msrs(void *info) static void do_inject(void) { - u64 mcg_status = 0; unsigned int cpu = i_mce.extcpu; + struct mce_hw_err err; + u64 mcg_status = 0; u8 b = i_mce.bank; i_mce.tsc = rdtsc_ordered(); @@ -517,7 +518,8 @@ static void do_inject(void) i_mce.status |= MCI_STATUS_SYNDV; if (inj_type == SW_INJ) { - mce_log(&i_mce); + err.m = i_mce; + mce_log(&err); return; } diff --git a/arch/x86/kernel/cpu/mce/intel.c b/arch/x86/kernel/cpu/mce/intel.c index f6103e6bf69a..b3cd2c61b11d 100644 --- a/arch/x86/kernel/cpu/mce/intel.c +++ b/arch/x86/kernel/cpu/mce/intel.c @@ -94,7 +94,7 @@ static int cmci_supported(int *banks) if (!boot_cpu_has(X86_FEATURE_APIC) || lapic_get_maxlvt() < 6) return 0; rdmsrl(MSR_IA32_MCG_CAP, cap); - *banks = min_t(unsigned, MAX_NR_BANKS, cap & 0xff); + *banks = min_t(unsigned, MAX_NR_BANKS, cap & MCG_BANKCNT_MASK); return !!(cap & MCG_CMCI_P); } diff --git a/arch/x86/kernel/cpu/mce/internal.h b/arch/x86/kernel/cpu/mce/internal.h index 43c7f3b71df5..84f810598231 100644 --- a/arch/x86/kernel/cpu/mce/internal.h +++ b/arch/x86/kernel/cpu/mce/internal.h @@ -26,12 +26,12 @@ extern struct blocking_notifier_head x86_mce_decoder_chain; struct mce_evt_llist { struct llist_node llnode; - struct mce mce; + struct mce_hw_err err; }; void mce_gen_pool_process(struct work_struct *__unused); bool mce_gen_pool_empty(void); -int mce_gen_pool_add(struct mce *mce); +int mce_gen_pool_add(struct mce_hw_err *err); int mce_gen_pool_init(void); struct llist_node *mce_gen_pool_prepare_records(void); diff --git a/drivers/edac/mce_amd.c b/drivers/edac/mce_amd.c index 8130c3dc64da..50d74d3bf0f5 100644 --- a/drivers/edac/mce_amd.c +++ b/drivers/edac/mce_amd.c @@ -793,7 +793,9 @@ static int amd_decode_mce(struct notifier_block *nb, unsigned long val, void *data) { struct mce *m = (struct mce *)data; + struct mce_hw_err *err = to_mce_hw_err(m); unsigned int fam = x86_family(m->cpuid); + u32 mca_config_lo = 0, dummy; int ecc; if (m->kflags & MCE_HANDLED_CEC) @@ -813,11 +815,9 @@ amd_decode_mce(struct notifier_block *nb, unsigned long val, void *data) ((m->status & MCI_STATUS_PCC) ? "PCC" : "-")); if (boot_cpu_has(X86_FEATURE_SMCA)) { - u32 low, high; - u32 addr = MSR_AMD64_SMCA_MCx_CONFIG(m->bank); + rdmsr_safe(MSR_AMD64_SMCA_MCx_CONFIG(m->bank), &mca_config_lo, &dummy); - if (!rdmsr_safe(addr, &low, &high) && - (low & MCI_CONFIG_MCAX)) + if (mca_config_lo & MCI_CONFIG_MCAX) pr_cont("|%s", ((m->status & MCI_STATUS_TCC) ? "TCC" : "-")); pr_cont("|%s", ((m->status & MCI_STATUS_SYNDV) ? "SyndV" : "-")); @@ -850,8 +850,18 @@ amd_decode_mce(struct notifier_block *nb, unsigned long val, void *data) if (boot_cpu_has(X86_FEATURE_SMCA)) { pr_emerg(HW_ERR "IPID: 0x%016llx", m->ipid); - if (m->status & MCI_STATUS_SYNDV) - pr_cont(", Syndrome: 0x%016llx", m->synd); + if (m->status & MCI_STATUS_SYNDV) { + pr_cont(", Syndrome: 0x%016llx\n", m->synd); + if (mca_config_lo & MCI_CONFIG_FRUTEXT) { + char frutext[17]; + + frutext[16] = '\0'; + memcpy(&frutext[0], &err->vendor.amd.synd1, 8); + memcpy(&frutext[8], &err->vendor.amd.synd2, 8); + + pr_emerg(HW_ERR "FRU Text: %s", frutext); + } + } pr_cont("\n"); diff --git a/include/trace/events/mce.h b/include/trace/events/mce.h index f0f7b3cb2041..c1c50df9ecfd 100644 --- a/include/trace/events/mce.h +++ b/include/trace/events/mce.h @@ -19,9 +19,9 @@ TRACE_EVENT(mce_record, - TP_PROTO(struct mce *m), + TP_PROTO(struct mce_hw_err *err), - TP_ARGS(m), + TP_ARGS(err), TP_STRUCT__entry( __field( u64, mcgcap ) @@ -43,31 +43,33 @@ TRACE_EVENT(mce_record, __field( u8, bank ) __field( u8, cpuvendor ) __field( u32, microcode ) + __dynamic_array(u8, v_data, sizeof(err->vendor)) ), TP_fast_assign( - __entry->mcgcap = m->mcgcap; - __entry->mcgstatus = m->mcgstatus; - __entry->status = m->status; - __entry->addr = m->addr; - __entry->misc = m->misc; - __entry->synd = m->synd; - __entry->ipid = m->ipid; - __entry->ip = m->ip; - __entry->tsc = m->tsc; - __entry->ppin = m->ppin; - __entry->walltime = m->time; - __entry->cpu = m->extcpu; - __entry->cpuid = m->cpuid; - __entry->apicid = m->apicid; - __entry->socketid = m->socketid; - __entry->cs = m->cs; - __entry->bank = m->bank; - __entry->cpuvendor = m->cpuvendor; - __entry->microcode = m->microcode; + __entry->mcgcap = err->m.mcgcap; + __entry->mcgstatus = err->m.mcgstatus; + __entry->status = err->m.status; + __entry->addr = err->m.addr; + __entry->misc = err->m.misc; + __entry->synd = err->m.synd; + __entry->ipid = err->m.ipid; + __entry->ip = err->m.ip; + __entry->tsc = err->m.tsc; + __entry->ppin = err->m.ppin; + __entry->walltime = err->m.time; + __entry->cpu = err->m.extcpu; + __entry->cpuid = err->m.cpuid; + __entry->apicid = err->m.apicid; + __entry->socketid = err->m.socketid; + __entry->cs = err->m.cs; + __entry->bank = err->m.bank; + __entry->cpuvendor = err->m.cpuvendor; + __entry->microcode = err->m.microcode; + memcpy(__get_dynamic_array(v_data), &err->vendor, sizeof(err->vendor)); ), - TP_printk("CPU: %d, MCGc/s: %llx/%llx, MC%d: %016Lx, IPID: %016Lx, ADDR: %016Lx, MISC: %016Lx, SYND: %016Lx, RIP: %02x:<%016Lx>, TSC: %llx, PPIN: %llx, vendor: %u, CPUID: %x, time: %llu, socket: %u, APIC: %x, microcode: %x", + TP_printk("CPU: %d, MCGc/s: %llx/%llx, MC%d: %016llx, IPID: %016llx, ADDR: %016llx, MISC: %016llx, SYND: %016llx, RIP: %02x:<%016llx>, TSC: %llx, PPIN: %llx, vendor: %u, CPUID: %x, time: %llu, socket: %u, APIC: %x, microcode: %x, vendor data: %s", __entry->cpu, __entry->mcgcap, __entry->mcgstatus, __entry->bank, __entry->status, @@ -83,7 +85,8 @@ TRACE_EVENT(mce_record, __entry->walltime, __entry->socketid, __entry->apicid, - __entry->microcode) + __entry->microcode, + __print_dynamic_array(v_data, sizeof(u8))) ); #endif /* _TRACE_MCE_H */ diff --git a/include/trace/stages/stage3_trace_output.h b/include/trace/stages/stage3_trace_output.h index c1fb1355d309..1e7b0bef95f5 100644 --- a/include/trace/stages/stage3_trace_output.h +++ b/include/trace/stages/stage3_trace_output.h @@ -119,6 +119,14 @@ trace_print_array_seq(p, array, count, el_size); \ }) +#undef __print_dynamic_array +#define __print_dynamic_array(array, el_size) \ + ({ \ + __print_array(__get_dynamic_array(array), \ + __get_dynamic_array_len(array) / (el_size), \ + (el_size)); \ + }) + #undef __print_hex_dump #define __print_hex_dump(prefix_str, prefix_type, \ rowsize, groupsize, buf, len, ascii) \ diff --git a/include/trace/stages/stage7_class_define.h b/include/trace/stages/stage7_class_define.h index bcb960d16fc0..fcd564a590f4 100644 --- a/include/trace/stages/stage7_class_define.h +++ b/include/trace/stages/stage7_class_define.h @@ -22,6 +22,7 @@ #undef __get_rel_cpumask #undef __get_rel_sockaddr #undef __print_array +#undef __print_dynamic_array #undef __print_hex_dump #undef __get_buf diff --git a/samples/trace_events/trace-events-sample.h b/samples/trace_events/trace-events-sample.h index 55f9a3da92d5..999f78d380ae 100644 --- a/samples/trace_events/trace-events-sample.h +++ b/samples/trace_events/trace-events-sample.h @@ -319,7 +319,7 @@ TRACE_EVENT(foo_bar, __assign_cpumask(cpum, cpumask_bits(mask)); ), - TP_printk("foo %s %d %s %s %s %s %s (%s) (%s) %s", __entry->foo, __entry->bar, + TP_printk("foo %s %d %s %s %s %s %s %s (%s) (%s) %s", __entry->foo, __entry->bar, /* * Notice here the use of some helper functions. This includes: @@ -363,6 +363,11 @@ TRACE_EVENT(foo_bar, __print_array(__get_dynamic_array(list), __get_dynamic_array_len(list) / sizeof(int), sizeof(int)), + +/* A shortcut is to use __print_dynamic_array for dynamic arrays */ + + __print_dynamic_array(list, sizeof(int)), + __get_str(str), __get_str(lstr), __get_bitmask(cpus), __get_cpumask(cpum), __get_str(vstr))