/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_X86_MCE_H #define _ASM_X86_MCE_H #include /* * Machine Check support for x86 */ /* MCG_CAP register defines */ #define MCG_BANKCNT_MASK 0xff /* Number of Banks */ #define MCG_CTL_P BIT_ULL(8) /* MCG_CTL register available */ #define MCG_EXT_P BIT_ULL(9) /* Extended registers available */ #define MCG_CMCI_P BIT_ULL(10) /* CMCI supported */ #define MCG_SEAM_NR BIT_ULL(12) /* MCG_STATUS_SEAM_NR supported */ #define MCG_EXT_CNT_MASK 0xff0000 /* Number of Extended registers */ #define MCG_EXT_CNT_SHIFT 16 #define MCG_EXT_CNT(c) (((c) & MCG_EXT_CNT_MASK) >> MCG_EXT_CNT_SHIFT) #define MCG_SER_P BIT_ULL(24) /* MCA recovery/new status bits */ #define MCG_ELOG_P BIT_ULL(26) /* Extended error log supported */ #define MCG_LMCE_P BIT_ULL(27) /* Local machine check supported */ /* MCG_STATUS register defines */ #define MCG_STATUS_RIPV BIT_ULL(0) /* restart ip valid */ #define MCG_STATUS_EIPV BIT_ULL(1) /* ip points to correct instruction */ #define MCG_STATUS_MCIP BIT_ULL(2) /* machine check in progress */ #define MCG_STATUS_LMCES BIT_ULL(3) /* LMCE signaled */ #define MCG_STATUS_SEAM_NR BIT_ULL(12) /* Machine check inside SEAM non-root mode */ /* MCG_EXT_CTL register defines */ #define MCG_EXT_CTL_LMCE_EN BIT_ULL(0) /* Enable LMCE */ /* MCi_STATUS register defines */ #define MCI_STATUS_VAL BIT_ULL(63) /* valid error */ #define MCI_STATUS_OVER BIT_ULL(62) /* previous errors lost */ #define MCI_STATUS_UC BIT_ULL(61) /* uncorrected error */ #define MCI_STATUS_EN BIT_ULL(60) /* error enabled */ #define MCI_STATUS_MISCV BIT_ULL(59) /* misc error reg. valid */ #define MCI_STATUS_ADDRV BIT_ULL(58) /* addr reg. valid */ #define MCI_STATUS_PCC BIT_ULL(57) /* processor context corrupt */ #define MCI_STATUS_S BIT_ULL(56) /* Signaled machine check */ #define MCI_STATUS_AR BIT_ULL(55) /* Action required */ #define MCI_STATUS_CEC_SHIFT 38 /* Corrected Error Count */ #define MCI_STATUS_CEC_MASK GENMASK_ULL(52,38) #define MCI_STATUS_CEC(c) (((c) & MCI_STATUS_CEC_MASK) >> MCI_STATUS_CEC_SHIFT) #define MCI_STATUS_MSCOD(m) (((m) >> 16) & 0xffff) /* AMD-specific bits */ #define MCI_STATUS_TCC BIT_ULL(55) /* Task context corrupt */ #define MCI_STATUS_SYNDV BIT_ULL(53) /* synd reg. valid */ #define MCI_STATUS_DEFERRED BIT_ULL(44) /* uncorrected error, deferred exception */ #define MCI_STATUS_POISON BIT_ULL(43) /* access poisonous data */ #define MCI_STATUS_SCRUB BIT_ULL(40) /* Error detected during scrub operation */ /* * McaX field if set indicates a given bank supports MCA extensions: * - Deferred error interrupt type is specifiable by bank. * - MCx_MISC0[BlkPtr] field indicates presence of extended MISC registers, * But should not be used to determine MSR numbers. * - TCC bit is present in MCx_STATUS. */ #define MCI_CONFIG_MCAX 0x1 #define MCI_IPID_MCATYPE 0xFFFF0000 #define MCI_IPID_HWID 0xFFF /* * Note that the full MCACOD field of IA32_MCi_STATUS MSR is * bits 15:0. But bit 12 is the 'F' bit, defined for corrected * errors to indicate that errors are being filtered by hardware. * We should mask out bit 12 when looking for specific signatures * of uncorrected errors - so the F bit is deliberately skipped * in this #define. */ #define MCACOD 0xefff /* MCA Error Code */ /* Architecturally defined codes from SDM Vol. 3B Chapter 15 */ #define MCACOD_SCRUB 0x00C0 /* 0xC0-0xCF Memory Scrubbing */ #define MCACOD_SCRUBMSK 0xeff0 /* Skip bit 12 ('F' bit) */ #define MCACOD_L3WB 0x017A /* L3 Explicit Writeback */ #define MCACOD_DATA 0x0134 /* Data Load */ #define MCACOD_INSTR 0x0150 /* Instruction Fetch */ /* MCi_MISC register defines */ #define MCI_MISC_ADDR_LSB(m) ((m) & 0x3f) #define MCI_MISC_ADDR_MODE(m) (((m) >> 6) & 7) #define MCI_MISC_ADDR_SEGOFF 0 /* segment offset */ #define MCI_MISC_ADDR_LINEAR 1 /* linear address */ #define MCI_MISC_ADDR_PHYS 2 /* physical address */ #define MCI_MISC_ADDR_MEM 3 /* memory address */ #define MCI_MISC_ADDR_GENERIC 7 /* generic */ /* MCi_ADDR register defines */ #define MCI_ADDR_PHYSADDR GENMASK_ULL(boot_cpu_data.x86_phys_bits - 1, 0) /* CTL2 register defines */ #define MCI_CTL2_CMCI_EN BIT_ULL(30) #define MCI_CTL2_CMCI_THRESHOLD_MASK 0x7fffULL #define MCJ_CTX_MASK 3 #define MCJ_CTX(flags) ((flags) & MCJ_CTX_MASK) #define MCJ_CTX_RANDOM 0 /* inject context: random */ #define MCJ_CTX_PROCESS 0x1 /* inject context: process */ #define MCJ_CTX_IRQ 0x2 /* inject context: IRQ */ #define MCJ_NMI_BROADCAST 0x4 /* do NMI broadcasting */ #define MCJ_EXCEPTION 0x8 /* raise as exception */ #define MCJ_IRQ_BROADCAST 0x10 /* do IRQ broadcasting */ #define MCE_OVERFLOW 0 /* bit 0 in flags means overflow */ #define MCE_LOG_MIN_LEN 32U #define MCE_LOG_SIGNATURE "MACHINECHECK" /* AMD Scalable MCA */ #define MSR_AMD64_SMCA_MC0_CTL 0xc0002000 #define MSR_AMD64_SMCA_MC0_STATUS 0xc0002001 #define MSR_AMD64_SMCA_MC0_ADDR 0xc0002002 #define MSR_AMD64_SMCA_MC0_MISC0 0xc0002003 #define MSR_AMD64_SMCA_MC0_CONFIG 0xc0002004 #define MSR_AMD64_SMCA_MC0_IPID 0xc0002005 #define MSR_AMD64_SMCA_MC0_SYND 0xc0002006 #define MSR_AMD64_SMCA_MC0_DESTAT 0xc0002008 #define MSR_AMD64_SMCA_MC0_DEADDR 0xc0002009 #define MSR_AMD64_SMCA_MC0_MISC1 0xc000200a #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)) #define MSR_AMD64_SMCA_MCx_MISC(x) (MSR_AMD64_SMCA_MC0_MISC0 + 0x10*(x)) #define MSR_AMD64_SMCA_MCx_CONFIG(x) (MSR_AMD64_SMCA_MC0_CONFIG + 0x10*(x)) #define MSR_AMD64_SMCA_MCx_IPID(x) (MSR_AMD64_SMCA_MC0_IPID + 0x10*(x)) #define MSR_AMD64_SMCA_MCx_SYND(x) (MSR_AMD64_SMCA_MC0_SYND + 0x10*(x)) #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 XEC(x, mask) (((x) >> 16) & mask) /* mce.kflags flag bits for logging etc. */ #define MCE_HANDLED_CEC BIT_ULL(0) #define MCE_HANDLED_UC BIT_ULL(1) #define MCE_HANDLED_EXTLOG BIT_ULL(2) #define MCE_HANDLED_NFIT BIT_ULL(3) #define MCE_HANDLED_EDAC BIT_ULL(4) #define MCE_HANDLED_MCELOG BIT_ULL(5) /* * Indicates an MCE which has happened in kernel space but from * which the kernel can recover simply by executing fixup_exception() * so that an error is returned to the caller of the function that * hit the machine check. */ #define MCE_IN_KERNEL_RECOV BIT_ULL(6) /* * Indicates an MCE that happened in kernel space while copying data * from user. In this case fixup_exception() gets the kernel to the * error exit for the copy function. Machine check handler can then * treat it like a fault taken in user mode. */ #define MCE_IN_KERNEL_COPYIN BIT_ULL(7) /* * This structure contains all data related to the MCE log. Also * carries a signature to make it easier to find from external * debugging tools. Each entry is only valid when its finished flag * is set. */ struct mce_log_buffer { char signature[12]; /* "MACHINECHECK" */ unsigned len; /* = elements in .mce_entry[] */ unsigned next; unsigned flags; unsigned recordlen; /* length of struct mce */ struct mce entry[]; }; /* Highest last */ enum mce_notifier_prios { MCE_PRIO_LOWEST, MCE_PRIO_MCELOG, MCE_PRIO_EDAC, MCE_PRIO_NFIT, MCE_PRIO_EXTLOG, MCE_PRIO_UC, MCE_PRIO_EARLY, MCE_PRIO_CEC, MCE_PRIO_HIGHEST = MCE_PRIO_CEC }; struct notifier_block; extern void mce_register_decode_chain(struct notifier_block *nb); extern void mce_unregister_decode_chain(struct notifier_block *nb); #include #include extern int mce_p5_enabled; #ifdef CONFIG_ARCH_HAS_COPY_MC extern void enable_copy_mc_fragile(void); unsigned long __must_check copy_mc_fragile(void *dst, const void *src, unsigned cnt); #else static inline void enable_copy_mc_fragile(void) { } #endif struct cper_ia_proc_ctx; #ifdef CONFIG_X86_MCE int mcheck_init(void); void mcheck_cpu_init(struct cpuinfo_x86 *c); void mcheck_cpu_clear(struct cpuinfo_x86 *c); int apei_smca_report_x86_error(struct cper_ia_proc_ctx *ctx_info, u64 lapic_id); #else static inline int mcheck_init(void) { return 0; } static inline void mcheck_cpu_init(struct cpuinfo_x86 *c) {} static inline void mcheck_cpu_clear(struct cpuinfo_x86 *c) {} 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); DECLARE_PER_CPU(struct device *, mce_device); /* Maximum number of MCA banks per CPU. */ #define MAX_NR_BANKS 64 #ifdef CONFIG_X86_MCE_INTEL void mce_intel_feature_init(struct cpuinfo_x86 *c); void mce_intel_feature_clear(struct cpuinfo_x86 *c); void cmci_clear(void); void cmci_reenable(void); void cmci_rediscover(void); void cmci_recheck(void); #else static inline void mce_intel_feature_init(struct cpuinfo_x86 *c) { } static inline void mce_intel_feature_clear(struct cpuinfo_x86 *c) { } static inline void cmci_clear(void) {} static inline void cmci_reenable(void) {} static inline void cmci_rediscover(void) {} static inline void cmci_recheck(void) {} #endif int mce_available(struct cpuinfo_x86 *c); bool mce_is_memory_error(struct mce *m); bool mce_is_correctable(struct mce *m); bool mce_usable_address(struct mce *m); DECLARE_PER_CPU(unsigned, mce_exception_count); DECLARE_PER_CPU(unsigned, mce_poll_count); typedef DECLARE_BITMAP(mce_banks_t, MAX_NR_BANKS); DECLARE_PER_CPU(mce_banks_t, mce_poll_banks); enum mcp_flags { MCP_TIMESTAMP = BIT(0), /* log time stamp */ MCP_UC = BIT(1), /* log uncorrected errors */ MCP_DONTLOG = BIT(2), /* only clear, don't log */ MCP_QUEUE_LOG = BIT(3), /* only queue to genpool */ }; void machine_check_poll(enum mcp_flags flags, mce_banks_t *b); int mce_notify_irq(void); DECLARE_PER_CPU(struct mce, injectm); /* Disable CMCI/polling for MCA bank claimed by firmware */ extern void mce_disable_bank(int bank); /* * Exception handler */ void do_machine_check(struct pt_regs *pt_regs); /* * Threshold handler */ extern void (*mce_threshold_vector)(void); /* Deferred error interrupt handler */ extern void (*deferred_error_int_vector)(void); /* * Used by APEI to report memory error via /dev/mcelog */ struct cper_sec_mem_err; extern void apei_mce_report_mem_error(int corrected, struct cper_sec_mem_err *mem_err); /* * Enumerate new IP types and HWID values in AMD processors which support * Scalable MCA. */ #ifdef CONFIG_X86_MCE_AMD /* These may be used by multiple smca_hwid_mcatypes */ enum smca_bank_types { SMCA_LS = 0, /* Load Store */ SMCA_LS_V2, SMCA_IF, /* Instruction Fetch */ SMCA_L2_CACHE, /* L2 Cache */ SMCA_DE, /* Decoder Unit */ SMCA_RESERVED, /* Reserved */ SMCA_EX, /* Execution Unit */ SMCA_FP, /* Floating Point */ SMCA_L3_CACHE, /* L3 Cache */ SMCA_CS, /* Coherent Slave */ SMCA_CS_V2, SMCA_PIE, /* Power, Interrupts, etc. */ SMCA_UMC, /* Unified Memory Controller */ SMCA_UMC_V2, SMCA_MA_LLC, /* Memory Attached Last Level Cache */ SMCA_PB, /* Parameter Block */ SMCA_PSP, /* Platform Security Processor */ SMCA_PSP_V2, SMCA_SMU, /* System Management Unit */ SMCA_SMU_V2, SMCA_MP5, /* Microprocessor 5 Unit */ SMCA_MPDMA, /* MPDMA Unit */ SMCA_NBIO, /* Northbridge IO Unit */ SMCA_PCIE, /* PCI Express Unit */ SMCA_PCIE_V2, SMCA_XGMI_PCS, /* xGMI PCS Unit */ SMCA_NBIF, /* NBIF Unit */ SMCA_SHUB, /* System HUB Unit */ SMCA_SATA, /* SATA Unit */ SMCA_USB, /* USB Unit */ SMCA_USR_DP, /* Ultra Short Reach Data Plane Controller */ SMCA_USR_CP, /* Ultra Short Reach Control Plane Controller */ SMCA_GMI_PCS, /* GMI PCS Unit */ SMCA_XGMI_PHY, /* xGMI PHY Unit */ SMCA_WAFL_PHY, /* WAFL PHY Unit */ SMCA_GMI_PHY, /* GMI PHY Unit */ N_SMCA_BANK_TYPES }; extern bool amd_mce_is_memory_error(struct mce *m); extern int mce_threshold_create_device(unsigned int cpu); extern int mce_threshold_remove_device(unsigned int cpu); void mce_amd_feature_init(struct cpuinfo_x86 *c); enum smca_bank_types smca_get_bank_type(unsigned int cpu, unsigned int bank); #else static inline int mce_threshold_create_device(unsigned int cpu) { return 0; }; static inline int mce_threshold_remove_device(unsigned int cpu) { return 0; }; static inline bool amd_mce_is_memory_error(struct mce *m) { return false; }; static inline void mce_amd_feature_init(struct cpuinfo_x86 *c) { } #endif static inline void mce_hygon_feature_init(struct cpuinfo_x86 *c) { return mce_amd_feature_init(c); } unsigned long copy_mc_fragile_handle_tail(char *to, char *from, unsigned len); #endif /* _ASM_X86_MCE_H */