From 5896820e0aa32572ad03b30563c539655b6c6375 Mon Sep 17 00:00:00 2001 From: Yazen Ghannam Date: Mon, 12 Sep 2016 09:59:34 +0200 Subject: [PATCH] x86/mce/AMD, EDAC/mce_amd: Define and use tables for known SMCA IP types Scalable MCA defines a number of IP types. An MCA bank on an SMCA system is defined as one of these IP types. A bank's type is uniquely identified by the combination of the HWID and MCATYPE values read from its MCA_IPID register. Add the required tables in order to be able to lookup error descriptions based on a bank's type and the error's extended error code. [ bp: Align comments, simplify a bit. ] Signed-off-by: Yazen Ghannam Signed-off-by: Borislav Petkov Link: http://lkml.kernel.org/r/1472741832-1690-1-git-send-email-Yazen.Ghannam@amd.com Signed-off-by: Thomas Gleixner --- arch/x86/include/asm/mce.h | 61 +++++------ arch/x86/kernel/cpu/mcheck/mce_amd.c | 104 ++++++++++++++----- drivers/edac/mce_amd.c | 194 +++++++---------------------------- 3 files changed, 147 insertions(+), 212 deletions(-) diff --git a/arch/x86/include/asm/mce.h b/arch/x86/include/asm/mce.h index 21bc5a3..9bd7ff5 100644 --- a/arch/x86/include/asm/mce.h +++ b/arch/x86/include/asm/mce.h @@ -337,44 +337,47 @@ extern void apei_mce_report_mem_error(int corrected, * Scalable MCA. */ #ifdef CONFIG_X86_MCE_AMD -enum amd_ip_types { - SMCA_F17H_CORE = 0, /* Core errors */ - SMCA_DF, /* Data Fabric */ - SMCA_UMC, /* Unified Memory Controller */ - SMCA_PB, /* Parameter Block */ - SMCA_PSP, /* Platform Security Processor */ - SMCA_SMU, /* System Management Unit */ - N_AMD_IP_TYPES -}; - -struct amd_hwid { - const char *name; - unsigned int hwid; -}; -extern struct amd_hwid amd_hwids[N_AMD_IP_TYPES]; - -enum amd_core_mca_blocks { +/* These may be used by multiple smca_hwid_mcatypes */ +enum smca_bank_types { SMCA_LS = 0, /* Load Store */ SMCA_IF, /* Instruction Fetch */ - SMCA_L2_CACHE, /* L2 cache */ - SMCA_DE, /* Decoder unit */ - RES, /* Reserved */ - SMCA_EX, /* Execution unit */ + SMCA_L2_CACHE, /* L2 Cache */ + SMCA_DE, /* Decoder Unit */ + SMCA_EX, /* Execution Unit */ SMCA_FP, /* Floating Point */ - SMCA_L3_CACHE, /* L3 cache */ - N_CORE_MCA_BLOCKS + SMCA_L3_CACHE, /* L3 Cache */ + SMCA_CS, /* Coherent Slave */ + SMCA_PIE, /* Power, Interrupts, etc. */ + SMCA_UMC, /* Unified Memory Controller */ + SMCA_PB, /* Parameter Block */ + SMCA_PSP, /* Platform Security Processor */ + SMCA_SMU, /* System Management Unit */ + N_SMCA_BANK_TYPES +}; + +struct smca_bank_name { + const char *name; /* Short name for sysfs */ + const char *long_name; /* Long name for pretty-printing */ }; -extern const char * const amd_core_mcablock_names[N_CORE_MCA_BLOCKS]; +extern struct smca_bank_name smca_bank_names[N_SMCA_BANK_TYPES]; + +#define HWID_MCATYPE(hwid, mcatype) ((hwid << 16) | mcatype) -enum amd_df_mca_blocks { - SMCA_CS = 0, /* Coherent Slave */ - SMCA_PIE, /* Power management, Interrupts, etc */ - N_DF_BLOCKS +struct smca_hwid_mcatype { + unsigned int bank_type; /* Use with smca_bank_types for easy indexing. */ + u32 hwid_mcatype; /* (hwid,mcatype) tuple */ + u32 xec_bitmap; /* Bitmap of valid ExtErrorCodes; current max is 21. */ }; -extern const char * const amd_df_mcablock_names[N_DF_BLOCKS]; +struct smca_bank_info { + struct smca_hwid_mcatype *type; + u32 type_instance; +}; + +extern struct smca_bank_info smca_banks[MAX_NR_BANKS]; + #endif #endif /* _ASM_X86_MCE_H */ diff --git a/arch/x86/kernel/cpu/mcheck/mce_amd.c b/arch/x86/kernel/cpu/mcheck/mce_amd.c index 9da92fb..3b74b62 100644 --- a/arch/x86/kernel/cpu/mcheck/mce_amd.c +++ b/arch/x86/kernel/cpu/mcheck/mce_amd.c @@ -63,34 +63,55 @@ static const char * const th_names[] = { "execution_unit", }; -/* Define HWID to IP type mappings for Scalable MCA */ -struct amd_hwid amd_hwids[] = { - [SMCA_F17H_CORE] = { "f17h_core", 0xB0 }, - [SMCA_DF] = { "data_fabric", 0x2E }, - [SMCA_UMC] = { "umc", 0x96 }, - [SMCA_PB] = { "param_block", 0x5 }, - [SMCA_PSP] = { "psp", 0xFF }, - [SMCA_SMU] = { "smu", 0x1 }, +struct smca_bank_name smca_bank_names[] = { + [SMCA_LS] = { "load_store", "Load Store Unit" }, + [SMCA_IF] = { "insn_fetch", "Instruction Fetch Unit" }, + [SMCA_L2_CACHE] = { "l2_cache", "L2 Cache" }, + [SMCA_DE] = { "decode_unit", "Decode Unit" }, + [SMCA_EX] = { "execution_unit", "Execution Unit" }, + [SMCA_FP] = { "floating_point", "Floating Point Unit" }, + [SMCA_L3_CACHE] = { "l3_cache", "L3 Cache" }, + [SMCA_CS] = { "coherent_slave", "Coherent Slave" }, + [SMCA_PIE] = { "pie", "Power, Interrupts, etc." }, + [SMCA_UMC] = { "umc", "Unified Memory Controller" }, + [SMCA_PB] = { "param_block", "Parameter Block" }, + [SMCA_PSP] = { "psp", "Platform Security Processor" }, + [SMCA_SMU] = { "smu", "System Management Unit" }, }; -EXPORT_SYMBOL_GPL(amd_hwids); - -const char * const amd_core_mcablock_names[] = { - [SMCA_LS] = "load_store", - [SMCA_IF] = "insn_fetch", - [SMCA_L2_CACHE] = "l2_cache", - [SMCA_DE] = "decode_unit", - [RES] = "", - [SMCA_EX] = "execution_unit", - [SMCA_FP] = "floating_point", - [SMCA_L3_CACHE] = "l3_cache", -}; -EXPORT_SYMBOL_GPL(amd_core_mcablock_names); +EXPORT_SYMBOL_GPL(smca_bank_names); + +static struct smca_hwid_mcatype smca_hwid_mcatypes[] = { + /* { bank_type, hwid_mcatype, xec_bitmap } */ + + /* ZN Core (HWID=0xB0) MCA types */ + { SMCA_LS, HWID_MCATYPE(0xB0, 0x0), 0x1FFFEF }, + { SMCA_IF, HWID_MCATYPE(0xB0, 0x1), 0x3FFF }, + { SMCA_L2_CACHE, HWID_MCATYPE(0xB0, 0x2), 0xF }, + { SMCA_DE, HWID_MCATYPE(0xB0, 0x3), 0x1FF }, + /* HWID 0xB0 MCATYPE 0x4 is Reserved */ + { SMCA_EX, HWID_MCATYPE(0xB0, 0x5), 0x7FF }, + { SMCA_FP, HWID_MCATYPE(0xB0, 0x6), 0x7F }, + { SMCA_L3_CACHE, HWID_MCATYPE(0xB0, 0x7), 0xFF }, + + /* Data Fabric MCA types */ + { SMCA_CS, HWID_MCATYPE(0x2E, 0x0), 0x1FF }, + { SMCA_PIE, HWID_MCATYPE(0x2E, 0x1), 0xF }, + + /* Unified Memory Controller MCA type */ + { SMCA_UMC, HWID_MCATYPE(0x96, 0x0), 0x3F }, + + /* Parameter Block MCA type */ + { SMCA_PB, HWID_MCATYPE(0x05, 0x0), 0x1 }, -const char * const amd_df_mcablock_names[] = { - [SMCA_CS] = "coherent_slave", - [SMCA_PIE] = "pie", + /* Platform Security Processor MCA type */ + { SMCA_PSP, HWID_MCATYPE(0xFF, 0x0), 0x1 }, + + /* System Management Unit MCA type */ + { SMCA_SMU, HWID_MCATYPE(0x01, 0x0), 0x1 }, }; -EXPORT_SYMBOL_GPL(amd_df_mcablock_names); + +struct smca_bank_info smca_banks[MAX_NR_BANKS]; +EXPORT_SYMBOL_GPL(smca_banks); static DEFINE_PER_CPU(struct threshold_bank **, threshold_banks); static DEFINE_PER_CPU(unsigned int, bank_map); /* see which banks are on */ @@ -108,6 +129,36 @@ void (*deferred_error_int_vector)(void) = default_deferred_error_interrupt; * CPU Initialization */ +static void get_smca_bank_info(unsigned int bank) +{ + unsigned int i, hwid_mcatype, cpu = smp_processor_id(); + struct smca_hwid_mcatype *type; + u32 high, instanceId; + u16 hwid, mcatype; + + /* Collect bank_info using CPU 0 for now. */ + if (cpu) + return; + + if (rdmsr_safe_on_cpu(cpu, MSR_AMD64_SMCA_MCx_IPID(bank), &instanceId, &high)) { + pr_warn("Failed to read MCA_IPID for bank %d\n", bank); + return; + } + + hwid = high & MCI_IPID_HWID; + mcatype = (high & MCI_IPID_MCATYPE) >> 16; + hwid_mcatype = HWID_MCATYPE(hwid, mcatype); + + for (i = 0; i < ARRAY_SIZE(smca_hwid_mcatypes); i++) { + type = &smca_hwid_mcatypes[i]; + if (hwid_mcatype == type->hwid_mcatype) { + smca_banks[bank].type = type; + smca_banks[bank].type_instance = instanceId; + break; + } + } +} + struct thresh_restart { struct threshold_block *b; int reset; @@ -425,6 +476,9 @@ void mce_amd_feature_init(struct cpuinfo_x86 *c) int offset = -1; for (bank = 0; bank < mca_cfg.banks; ++bank) { + if (mce_flags.smca) + get_smca_bank_info(bank); + for (block = 0; block < NR_BLOCKS; ++block) { address = get_block_address(cpu, address, low, high, bank, block); if (!address) diff --git a/drivers/edac/mce_amd.c b/drivers/edac/mce_amd.c index ea549a9..99b3bf3 100644 --- a/drivers/edac/mce_amd.c +++ b/drivers/edac/mce_amd.c @@ -283,6 +283,27 @@ static const char * const smca_smu_mce_desc[] = { "SMU RAM ECC or parity error", }; +struct smca_mce_desc { + const char * const *descs; + unsigned int num_descs; +}; + +static struct smca_mce_desc smca_mce_descs[] = { + [SMCA_LS] = { smca_ls_mce_desc, ARRAY_SIZE(smca_ls_mce_desc) }, + [SMCA_IF] = { smca_if_mce_desc, ARRAY_SIZE(smca_if_mce_desc) }, + [SMCA_L2_CACHE] = { smca_l2_mce_desc, ARRAY_SIZE(smca_l2_mce_desc) }, + [SMCA_DE] = { smca_de_mce_desc, ARRAY_SIZE(smca_de_mce_desc) }, + [SMCA_EX] = { smca_ex_mce_desc, ARRAY_SIZE(smca_ex_mce_desc) }, + [SMCA_FP] = { smca_fp_mce_desc, ARRAY_SIZE(smca_fp_mce_desc) }, + [SMCA_L3_CACHE] = { smca_l3_mce_desc, ARRAY_SIZE(smca_l3_mce_desc) }, + [SMCA_CS] = { smca_cs_mce_desc, ARRAY_SIZE(smca_cs_mce_desc) }, + [SMCA_PIE] = { smca_pie_mce_desc, ARRAY_SIZE(smca_pie_mce_desc) }, + [SMCA_UMC] = { smca_umc_mce_desc, ARRAY_SIZE(smca_umc_mce_desc) }, + [SMCA_PB] = { smca_pb_mce_desc, ARRAY_SIZE(smca_pb_mce_desc) }, + [SMCA_PSP] = { smca_psp_mce_desc, ARRAY_SIZE(smca_psp_mce_desc) }, + [SMCA_SMU] = { smca_smu_mce_desc, ARRAY_SIZE(smca_smu_mce_desc) }, +}; + static bool f12h_mc0_mce(u16 ec, u8 xec) { bool ret = false; @@ -827,175 +848,32 @@ static void decode_mc6_mce(struct mce *m) pr_emerg(HW_ERR "Corrupted MC6 MCE info?\n"); } -static void decode_f17h_core_errors(const char *ip_name, u8 xec, - unsigned int mca_type) -{ - const char * const *error_desc_array; - size_t len; - - pr_emerg(HW_ERR "%s Error: ", ip_name); - - switch (mca_type) { - case SMCA_LS: - error_desc_array = smca_ls_mce_desc; - len = ARRAY_SIZE(smca_ls_mce_desc) - 1; - - if (xec == 0x4) { - pr_cont("Unrecognized LS MCA error code.\n"); - return; - } - break; - - case SMCA_IF: - error_desc_array = smca_if_mce_desc; - len = ARRAY_SIZE(smca_if_mce_desc) - 1; - break; - - case SMCA_L2_CACHE: - error_desc_array = smca_l2_mce_desc; - len = ARRAY_SIZE(smca_l2_mce_desc) - 1; - break; - - case SMCA_DE: - error_desc_array = smca_de_mce_desc; - len = ARRAY_SIZE(smca_de_mce_desc) - 1; - break; - - case SMCA_EX: - error_desc_array = smca_ex_mce_desc; - len = ARRAY_SIZE(smca_ex_mce_desc) - 1; - break; - - case SMCA_FP: - error_desc_array = smca_fp_mce_desc; - len = ARRAY_SIZE(smca_fp_mce_desc) - 1; - break; - - case SMCA_L3_CACHE: - error_desc_array = smca_l3_mce_desc; - len = ARRAY_SIZE(smca_l3_mce_desc) - 1; - break; - - default: - pr_cont("Corrupted MCA core error info.\n"); - return; - } - - if (xec > len) { - pr_cont("Unrecognized %s MCA bank error code.\n", - amd_core_mcablock_names[mca_type]); - return; - } - - pr_cont("%s.\n", error_desc_array[xec]); -} - -static void decode_df_errors(u8 xec, unsigned int mca_type) -{ - const char * const *error_desc_array; - size_t len; - - pr_emerg(HW_ERR "Data Fabric Error: "); - - switch (mca_type) { - case SMCA_CS: - error_desc_array = smca_cs_mce_desc; - len = ARRAY_SIZE(smca_cs_mce_desc) - 1; - break; - - case SMCA_PIE: - error_desc_array = smca_pie_mce_desc; - len = ARRAY_SIZE(smca_pie_mce_desc) - 1; - break; - - default: - pr_cont("Corrupted MCA Data Fabric info.\n"); - return; - } - - if (xec > len) { - pr_cont("Unrecognized %s MCA bank error code.\n", - amd_df_mcablock_names[mca_type]); - return; - } - - pr_cont("%s.\n", error_desc_array[xec]); -} - /* Decode errors according to Scalable MCA specification */ static void decode_smca_errors(struct mce *m) { - u32 addr = MSR_AMD64_SMCA_MCx_IPID(m->bank); - unsigned int hwid, mca_type, i; - u8 xec = XEC(m->status, xec_mask); - const char * const *error_desc_array; + struct smca_hwid_mcatype *type; + unsigned int bank_type; const char *ip_name; - u32 low, high; - size_t len; + u8 xec = XEC(m->status, xec_mask); - if (rdmsr_safe(addr, &low, &high)) { - pr_emerg(HW_ERR "Invalid IP block specified.\n"); + if (m->bank >= ARRAY_SIZE(smca_banks)) return; - } - - hwid = high & MCI_IPID_HWID; - mca_type = (high & MCI_IPID_MCATYPE) >> 16; - pr_emerg(HW_ERR "MC%d IPID value: 0x%08x%08x\n", m->bank, high, low); - - /* - * Based on hwid and mca_type values, decode errors from respective IPs. - * Note: mca_type values make sense only in the context of an hwid. - */ - for (i = 0; i < ARRAY_SIZE(amd_hwids); i++) - if (amd_hwids[i].hwid == hwid) - break; - - switch (i) { - case SMCA_F17H_CORE: - ip_name = (mca_type == SMCA_L3_CACHE) ? - "L3 Cache" : "F17h Core"; - return decode_f17h_core_errors(ip_name, xec, mca_type); - break; - - case SMCA_DF: - return decode_df_errors(xec, mca_type); - break; - - case SMCA_UMC: - error_desc_array = smca_umc_mce_desc; - len = ARRAY_SIZE(smca_umc_mce_desc) - 1; - break; - - case SMCA_PB: - error_desc_array = smca_pb_mce_desc; - len = ARRAY_SIZE(smca_pb_mce_desc) - 1; - break; - - case SMCA_PSP: - error_desc_array = smca_psp_mce_desc; - len = ARRAY_SIZE(smca_psp_mce_desc) - 1; - break; - - case SMCA_SMU: - error_desc_array = smca_smu_mce_desc; - len = ARRAY_SIZE(smca_smu_mce_desc) - 1; - break; - - default: - pr_emerg(HW_ERR "HWID:%d does not match any existing IPs.\n", hwid); + type = smca_banks[m->bank].type; + if (!type) return; - } - ip_name = amd_hwids[i].name; - pr_emerg(HW_ERR "%s Error: ", ip_name); + bank_type = type->bank_type; + ip_name = smca_bank_names[bank_type].long_name; - if (xec > len) { - pr_cont("Unrecognized %s MCA bank error code.\n", ip_name); - return; - } + pr_emerg(HW_ERR "%s Extended Error Code: %d\n", ip_name, xec); - pr_cont("%s.\n", error_desc_array[xec]); + /* Only print the decode of valid error codes */ + if (xec < smca_mce_descs[bank_type].num_descs && + (type->xec_bitmap & BIT_ULL(xec))) { + pr_emerg(HW_ERR "%s Error: ", ip_name); + pr_cont("%s.\n", smca_mce_descs[bank_type].descs[xec]); + } } static inline void amd_decode_err_code(u16 ec) -- 2.7.4