/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2009 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "gcpu.h" extern int x86gentopo_legacy; /* x86 generic topology support */ /* * Clear to log telemetry found at initialization. While processor docs * say you should process this telemetry on all but Intel family 0x6 * there are way too many exceptions and we want to avoid bogus * diagnoses. */ int gcpu_suppress_log_on_init = 1; /* * gcpu_mca_stack_flag is a debug assist option to capture a stack trace at * error logout time. The stack will be included in the ereport if the * error type selects stack inclusion, or in all cases if * gcpu_mca_stack_ereport_include is nonzero. */ int gcpu_mca_stack_flag = 0; int gcpu_mca_stack_ereport_include = 0; /* * The number of times to re-read MCA telemetry to try to obtain a * consistent snapshot if we find it to be changing under our feet. */ int gcpu_mca_telemetry_retries = 5; #ifndef __xpv int gcpu_mca_cmci_throttling_threshold = 10; int gcpu_mca_cmci_reenable_threshold = 1000; #endif static gcpu_error_disp_t gcpu_errtypes[] = { /* * Unclassified */ { FM_EREPORT_CPU_GENERIC_UNCLASSIFIED, NULL, FM_EREPORT_PAYLOAD_FLAGS_COMMON, MCAX86_SIMPLE_UNCLASSIFIED_MASKON, MCAX86_SIMPLE_UNCLASSIFIED_MASKOFF }, /* * Microcode ROM Parity Error */ { FM_EREPORT_CPU_GENERIC_MC_CODE_PARITY, NULL, FM_EREPORT_PAYLOAD_FLAGS_COMMON, MCAX86_SIMPLE_MC_CODE_PARITY_MASKON, MCAX86_SIMPLE_MC_CODE_PARITY_MASKOFF }, /* * External - BINIT# from another processor during power-on config */ { FM_EREPORT_CPU_GENERIC_EXTERNAL, NULL, FM_EREPORT_PAYLOAD_FLAGS_COMMON, MCAX86_SIMPLE_EXTERNAL_MASKON, MCAX86_SIMPLE_EXTERNAL_MASKOFF }, /* * Functional redundancy check master/slave error */ { FM_EREPORT_CPU_GENERIC_FRC, NULL, FM_EREPORT_PAYLOAD_FLAGS_COMMON, MCAX86_SIMPLE_FRC_MASKON, MCAX86_SIMPLE_FRC_MASKOFF }, /* * Internal parity error */ { FM_EREPORT_CPU_GENERIC_INTERNAL_PARITY, NULL, FM_EREPORT_PAYLOAD_FLAGS_COMMON, MCAX86_SIMPLE_INTERNAL_PARITY_MASKON, MCAX86_SIMPLE_INTERNAL_PARITY_MASKOFF }, /* * Internal timer error */ { FM_EREPORT_CPU_GENERIC_INTERNAL_TIMER, NULL, FM_EREPORT_PAYLOAD_FLAGS_COMMON, MCAX86_SIMPLE_INTERNAL_TIMER_MASKON, MCAX86_SIMPLE_INTERNAL_TIMER_MASKOFF }, /* * Internal unclassified */ { FM_EREPORT_CPU_GENERIC_INTERNAL_UNCLASS, NULL, FM_EREPORT_PAYLOAD_FLAGS_COMMON, MCAX86_SIMPLE_INTERNAL_UNCLASS_MASK_MASKON, MCAX86_SIMPLE_INTERNAL_UNCLASS_MASK_MASKOFF }, /* * Compound error codes - generic memory hierarchy */ { FM_EREPORT_CPU_GENERIC_GENMEMHIER, NULL, FM_EREPORT_PAYLOAD_FLAGS_COMMON, /* yes, no compound name */ MCAX86_COMPOUND_GENERIC_MEMHIER_MASKON, MCAX86_COMPOUND_GENERIC_MEMHIER_MASKOFF }, /* * Compound error codes - TLB errors */ { FM_EREPORT_CPU_GENERIC_TLB, "%1$s" "TLB" "%2$s" "_ERR", FM_EREPORT_PAYLOAD_FLAGS_COMPOUND_ERR, MCAX86_COMPOUND_TLB_MASKON, MCAX86_COMPOUND_TLB_MASKOFF }, /* * Compound error codes - memory hierarchy */ { FM_EREPORT_CPU_GENERIC_MEMHIER, "%1$s" "CACHE" "%2$s" "_" "%3$s" "_ERR", FM_EREPORT_PAYLOAD_FLAGS_COMPOUND_ERR, MCAX86_COMPOUND_MEMHIER_MASKON, MCAX86_COMPOUND_MEMHIER_MASKOFF }, /* * Compound error codes - bus and interconnect errors */ { FM_EREPORT_CPU_GENERIC_BUS_INTERCONNECT, "BUS" "%2$s" "_" "%4$s" "_" "%3$s" "_" "%5$s" "_" "%6$s" "_ERR", FM_EREPORT_PAYLOAD_FLAGS_COMPOUND_ERR, MCAX86_COMPOUND_BUS_INTERCONNECT_MASKON, MCAX86_COMPOUND_BUS_INTERCONNECT_MASKOFF }, /* * Compound error codes - memory controller errors */ { FM_EREPORT_CPU_GENERIC_MEMORY_CONTROLLER, "MC" "_" "%8$s" "_" "%9$s" "_ERR", FM_EREPORT_PAYLOAD_FLAGS_COMPOUND_ERR, MCAX86_COMPOUND_MEMORY_CONTROLLER_MASKON, MCAX86_COMPOUND_MEMORY_CONTROLLER_MASKOFF }, }; static gcpu_error_disp_t gcpu_unknown = { FM_EREPORT_CPU_GENERIC_UNKNOWN, "UNKNOWN", FM_EREPORT_PAYLOAD_FLAGS_COMMON, 0, 0 }; static errorq_t *gcpu_mca_queue; static kmutex_t gcpu_mca_queue_lock; #ifdef __xpv static int isxpv = 1; #else static int isxpv = 0; #endif static const gcpu_error_disp_t * gcpu_disp_match(uint16_t code) { const gcpu_error_disp_t *ged = gcpu_errtypes; int i; for (i = 0; i < sizeof (gcpu_errtypes) / sizeof (gcpu_error_disp_t); i++, ged++) { uint16_t on = ged->ged_errcode_mask_on; uint16_t off = ged->ged_errcode_mask_off; if ((code & on) == on && (code & off) == 0) return (ged); } return (NULL); } static uint8_t bit_strip(uint16_t code, uint16_t mask, uint16_t shift) { return ((uint8_t)(code & mask) >> shift); } #define BIT_STRIP(code, name) \ bit_strip(code, MCAX86_ERRCODE_##name##_MASK, \ MCAX86_ERRCODE_##name##_SHIFT) #define GCPU_MNEMONIC_UNDEF "undefined" #define GCPU_MNEMONIC_RESVD "reserved" /* * Mappings of TT, LL, RRRR, PP, II and T values to compound error name * mnemonics and to ereport class name components. */ struct gcpu_mnexp { const char *mne_compound; /* used in expanding compound errname */ const char *mne_ereport; /* used in expanding ereport class */ }; static struct gcpu_mnexp gcpu_TT_mnemonics[] = { /* MCAX86_ERRCODE_TT_* */ { "I", FM_EREPORT_CPU_GENERIC_TT_INSTR }, /* INSTR */ { "D", FM_EREPORT_CPU_GENERIC_TT_DATA }, /* DATA */ { "G", FM_EREPORT_CPU_GENERIC_TT_GEN }, /* GEN */ { GCPU_MNEMONIC_UNDEF, "" } }; static struct gcpu_mnexp gcpu_LL_mnemonics[] = { /* MCAX86_ERRCODE_LL_* */ { "LO", FM_EREPORT_CPU_GENERIC_LL_L0 }, /* L0 */ { "L1", FM_EREPORT_CPU_GENERIC_LL_L1 }, /* L1 */ { "L2", FM_EREPORT_CPU_GENERIC_LL_L2 }, /* L2 */ { "LG", FM_EREPORT_CPU_GENERIC_LL_LG } /* LG */ }; static struct gcpu_mnexp gcpu_RRRR_mnemonics[] = { /* MCAX86_ERRCODE_RRRR_* */ { "ERR", FM_EREPORT_CPU_GENERIC_RRRR_ERR }, /* ERR */ { "RD", FM_EREPORT_CPU_GENERIC_RRRR_RD }, /* RD */ { "WR", FM_EREPORT_CPU_GENERIC_RRRR_WR }, /* WR */ { "DRD", FM_EREPORT_CPU_GENERIC_RRRR_DRD }, /* DRD */ { "DWR", FM_EREPORT_CPU_GENERIC_RRRR_DWR }, /* DWR */ { "IRD", FM_EREPORT_CPU_GENERIC_RRRR_IRD }, /* IRD */ { "PREFETCH", FM_EREPORT_CPU_GENERIC_RRRR_PREFETCH }, /* PREFETCH */ { "EVICT", FM_EREPORT_CPU_GENERIC_RRRR_EVICT }, /* EVICT */ { "SNOOP", FM_EREPORT_CPU_GENERIC_RRRR_SNOOP }, /* SNOOP */ }; static struct gcpu_mnexp gcpu_PP_mnemonics[] = { /* MCAX86_ERRCODE_PP_* */ { "SRC", FM_EREPORT_CPU_GENERIC_PP_SRC }, /* SRC */ { "RES", FM_EREPORT_CPU_GENERIC_PP_RES }, /* RES */ { "OBS", FM_EREPORT_CPU_GENERIC_PP_OBS }, /* OBS */ { "", FM_EREPORT_CPU_GENERIC_PP_GEN } /* GEN */ }; static struct gcpu_mnexp gcpu_II_mnemonics[] = { /* MCAX86_ERRCODE_II_* */ { "M", FM_EREPORT_CPU_GENERIC_II_MEM }, /* MEM */ { GCPU_MNEMONIC_RESVD, "" }, { "IO", FM_EREPORT_CPU_GENERIC_II_IO }, /* IO */ { "", FM_EREPORT_CPU_GENERIC_II_GEN } /* GEN */ }; static struct gcpu_mnexp gcpu_T_mnemonics[] = { /* MCAX86_ERRCODE_T_* */ { "NOTIMEOUT", FM_EREPORT_CPU_GENERIC_T_NOTIMEOUT }, /* NONE */ { "TIMEOUT", FM_EREPORT_CPU_GENERIC_T_TIMEOUT } /* TIMEOUT */ }; static struct gcpu_mnexp gcpu_CCCC_mnemonics[] = { /* MCAX86_ERRCODE_CCCC_* */ { "CH0", FM_EREPORT_CPU_GENERIC_CCCC }, /* CH0 */ { "CH1", FM_EREPORT_CPU_GENERIC_CCCC }, /* CH1 */ { "CH2", FM_EREPORT_CPU_GENERIC_CCCC }, /* CH2 */ { "CH3", FM_EREPORT_CPU_GENERIC_CCCC }, /* CH3 */ { "CH4", FM_EREPORT_CPU_GENERIC_CCCC }, /* CH4 */ { "CH5", FM_EREPORT_CPU_GENERIC_CCCC }, /* CH5 */ { "CH6", FM_EREPORT_CPU_GENERIC_CCCC }, /* CH6 */ { "CH7", FM_EREPORT_CPU_GENERIC_CCCC }, /* CH7 */ { "CH8", FM_EREPORT_CPU_GENERIC_CCCC }, /* CH8 */ { "CH9", FM_EREPORT_CPU_GENERIC_CCCC }, /* CH9 */ { "CH10", FM_EREPORT_CPU_GENERIC_CCCC }, /* CH10 */ { "CH11", FM_EREPORT_CPU_GENERIC_CCCC }, /* CH11 */ { "CH12", FM_EREPORT_CPU_GENERIC_CCCC }, /* CH12 */ { "CH13", FM_EREPORT_CPU_GENERIC_CCCC }, /* CH13 */ { "CH14", FM_EREPORT_CPU_GENERIC_CCCC }, /* CH14 */ { "CH", FM_EREPORT_CPU_GENERIC_CCCC } /* GEN */ }; static struct gcpu_mnexp gcpu_MMM_mnemonics[] = { /* MCAX86_ERRCODE_MMM_* */ { "GEN", FM_EREPORT_CPU_GENERIC_MMM_ERR }, /* GEN ERR */ { "RD", FM_EREPORT_CPU_GENERIC_MMM_RD }, /* READ */ { "WR", FM_EREPORT_CPU_GENERIC_MMM_WR }, /* WRITE */ { "ADDR_CMD", FM_EREPORT_CPU_GENERIC_MMM_ADRCMD }, /* ADDR, CMD */ { "SCRUB", FM_EREPORT_CPU_GENERIC_MMM_SCRUB }, { GCPU_MNEMONIC_RESVD, ""}, /* RESERVED */ { GCPU_MNEMONIC_RESVD, ""}, /* RESERVED */ { GCPU_MNEMONIC_RESVD, ""} /* RESERVED */ }; enum gcpu_mn_namespace { GCPU_MN_NAMESPACE_COMPOUND, GCPU_MN_NAMESPACE_EREPORT }; static const char * gcpu_mnemonic(const struct gcpu_mnexp *tbl, size_t tbl_sz, uint8_t val, enum gcpu_mn_namespace nspace) { if (val >= tbl_sz) return (GCPU_MNEMONIC_UNDEF); /* for all namespaces */ switch (nspace) { case GCPU_MN_NAMESPACE_COMPOUND: return (tbl[val].mne_compound); /*NOTREACHED*/ case GCPU_MN_NAMESPACE_EREPORT: return (tbl[val].mne_ereport); /*NOTREACHED*/ default: return (GCPU_MNEMONIC_UNDEF); /*NOTREACHED*/ } } /* * The ereport class leaf component is either a simple string with no * format specifiers, or a string with one or more embedded %n$s specifiers - * positional selection for string arguments. The kernel snprintf does * not support %n$ (and teaching it to do so is too big a headache) so * we will expand this restricted format string ourselves. */ #define GCPU_CLASS_VARCOMPS 9 #define GCPU_MNEMONIC(code, name, nspace) \ gcpu_mnemonic(gcpu_##name##_mnemonics, \ sizeof (gcpu_##name##_mnemonics) / sizeof (struct gcpu_mnexp), \ BIT_STRIP(code, name), nspace) static void gcpu_mn_fmt(const char *fmt, char *buf, size_t buflen, uint64_t status, enum gcpu_mn_namespace nspace) { uint16_t code = MCAX86_ERRCODE(status); const char *mn[GCPU_CLASS_VARCOMPS]; char *p = buf; /* current position in buf */ char *q = buf + buflen; /* pointer past last char in buf */ int which, expfmtchar, error; char c; mn[0] = GCPU_MNEMONIC(code, TT, nspace); mn[1] = GCPU_MNEMONIC(code, LL, nspace); mn[2] = GCPU_MNEMONIC(code, RRRR, nspace); mn[3] = GCPU_MNEMONIC(code, PP, nspace); mn[4] = GCPU_MNEMONIC(code, II, nspace); mn[5] = GCPU_MNEMONIC(code, T, nspace); mn[6] = (status & MSR_MC_STATUS_UC) ? "_uc" : ""; mn[7] = GCPU_MNEMONIC(code, CCCC, nspace); mn[8] = GCPU_MNEMONIC(code, MMM, nspace); while (p < q - 1 && (c = *fmt++) != '\0') { if (c != '%') { /* not the beginning of a format specifier - copy */ *p++ = c; continue; } error = 0; which = -1; expfmtchar = -1; nextfmt: if ((c = *fmt++) == '\0') break; /* early termination of fmt specifier */ switch (c) { case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': if (which != -1) { /* allow only one positional digit */ error++; break; } which = c - '1'; goto nextfmt; /*NOTREACHED*/ case '$': if (which == -1) { /* no position specified */ error++; break; } expfmtchar = 's'; goto nextfmt; /*NOTREACHED*/ case 's': if (expfmtchar != 's') { error++; break; } (void) snprintf(p, (uintptr_t)q - (uintptr_t)p, "%s", mn[which]); p += strlen(p); break; default: error++; break; } if (error) break; } *p = '\0'; /* NUL termination */ } static void gcpu_erpt_clsfmt(const char *fmt, char *buf, size_t buflen, uint64_t status, const char *cpuclass, const char *leafclass) { char *p = buf; /* current position in buf */ char *q = buf + buflen; /* pointer past last char in buf */ (void) snprintf(buf, (uintptr_t)q - (uintptr_t)p, "%s.%s.", FM_ERROR_CPU, cpuclass ? cpuclass : FM_EREPORT_CPU_GENERIC); p += strlen(p); if (p >= q) return; if (leafclass == NULL) { gcpu_mn_fmt(fmt, p, (uintptr_t)q - (uintptr_t)p, status, GCPU_MN_NAMESPACE_EREPORT); } else { (void) snprintf(p, (uintptr_t)q - (uintptr_t)p, "%s", leafclass); } } /* * Create an "hc" scheme FMRI identifying the given cpu with * motherboard/chip/core/strand instance numbers. */ static nvlist_t * gcpu_fmri_create(cmi_hdl_t hdl, nv_alloc_t *nva) { nvlist_t *nvl, *fmri; if ((nvl = fm_nvlist_create(nva)) == NULL) return (NULL); if (!x86gentopo_legacy) { fmri = cmi_hdl_smb_bboard(hdl); if (fmri == NULL) return (NULL); fm_fmri_hc_create(nvl, FM_HC_SCHEME_VERSION, NULL, NULL, fmri, 3, "chip", cmi_hdl_smb_chipid(hdl), "core", cmi_hdl_coreid(hdl), "strand", cmi_hdl_strandid(hdl)); } else { fm_fmri_hc_set(nvl, FM_HC_SCHEME_VERSION, NULL, NULL, 4, "motherboard", 0, "chip", cmi_hdl_chipid(hdl), "core", cmi_hdl_coreid(hdl), "strand", cmi_hdl_strandid(hdl)); } return (nvl); } int gcpu_bleat_count_thresh = 5; hrtime_t gcpu_bleat_min_interval = 10 * 1000000000ULL; /* * Called when we are unable to propogate a logout structure onto an * errorq for subsequent ereport preparation and logging etc. The caller * should usually only decide to call this for severe errors - those we * suspect we may need to panic for. */ static void gcpu_bleat(cmi_hdl_t hdl, gcpu_logout_t *gcl) { hrtime_t now = gethrtime_waitfree(); static hrtime_t gcpu_last_bleat; gcpu_bank_logout_t *gbl; static int bleatcount; int i; /* * Throttle spamming of the console. The first gcpu_bleat_count_thresh * can come as fast as we like, but once we've spammed that many * to the console we require a minimum interval to pass before * any more complaints. */ if (++bleatcount > gcpu_bleat_count_thresh) { if (now - gcpu_last_bleat < gcpu_bleat_min_interval) return; else bleatcount = 0; } gcpu_last_bleat = now; cmn_err(CE_WARN, "Machine-Check Errors unlogged on chip %d core %d strand %d, " "raw dump follows", cmi_hdl_chipid(hdl), cmi_hdl_coreid(hdl), cmi_hdl_strandid(hdl)); cmn_err(CE_WARN, "MCG_STATUS 0x%016llx", (u_longlong_t)gcl->gcl_mcg_status); for (i = 0, gbl = &gcl->gcl_data[0]; i < gcl->gcl_nbanks; i++, gbl++) { uint64_t status = gbl->gbl_status; if (!(status & MSR_MC_STATUS_VAL)) continue; switch (status & (MSR_MC_STATUS_ADDRV | MSR_MC_STATUS_MISCV)) { case MSR_MC_STATUS_ADDRV | MSR_MC_STATUS_MISCV: cmn_err(CE_WARN, "Bank %d (offset 0x%llx) " "STAT 0x%016llx ADDR 0x%016llx MISC 0x%016llx", i, IA32_MSR_MC(i, STATUS), (u_longlong_t)status, (u_longlong_t)gbl->gbl_addr, (u_longlong_t)gbl->gbl_misc); break; case MSR_MC_STATUS_ADDRV: cmn_err(CE_WARN, "Bank %d (offset 0x%llx) " "STAT 0x%016llx ADDR 0x%016llx", i, IA32_MSR_MC(i, STATUS), (u_longlong_t)status, (u_longlong_t)gbl->gbl_addr); break; case MSR_MC_STATUS_MISCV: cmn_err(CE_WARN, "Bank %d (offset 0x%llx) " "STAT 0x%016llx MISC 0x%016llx", i, IA32_MSR_MC(i, STATUS), (u_longlong_t)status, (u_longlong_t)gbl->gbl_misc); break; default: cmn_err(CE_WARN, "Bank %d (offset 0x%llx) " "STAT 0x%016llx", i, IA32_MSR_MC(i, STATUS), (u_longlong_t)status); break; } } } #define _GCPU_BSTATUS(status, what) \ FM_EREPORT_PAYLOAD_NAME_MC_STATUS_##what, DATA_TYPE_BOOLEAN_VALUE, \ (status) & MSR_MC_STATUS_##what ? B_TRUE : B_FALSE static void gcpu_ereport_add_logout(nvlist_t *ereport, const gcpu_logout_t *gcl, uint_t bankno, const gcpu_error_disp_t *ged, uint16_t code) { uint64_t members = ged ? ged->ged_ereport_members : FM_EREPORT_PAYLOAD_FLAGS_COMMON; uint64_t mcg = gcl->gcl_mcg_status; int mcip = mcg & MCG_STATUS_MCIP; const gcpu_bank_logout_t *gbl = &gcl->gcl_data[bankno]; uint64_t bstat = gbl->gbl_status; /* * Include the compound error name if requested and if this * is a compound error type. */ if (members & FM_EREPORT_PAYLOAD_FLAG_COMPOUND_ERR && ged && ged->ged_compound_fmt != NULL) { char buf[FM_MAX_CLASS]; gcpu_mn_fmt(ged->ged_compound_fmt, buf, sizeof (buf), code, GCPU_MN_NAMESPACE_COMPOUND); fm_payload_set(ereport, FM_EREPORT_PAYLOAD_NAME_COMPOUND_ERR, DATA_TYPE_STRING, buf, NULL); } /* * Include disposition information for this error */ if (members & FM_EREPORT_PAYLOAD_FLAG_DISP && gbl->gbl_disp != 0) { int i, empty = 1; char buf[128]; char *p = buf, *q = buf + 128; static struct _gcpu_disp_name { uint64_t dv; const char *dn; } disp_names[] = { { CMI_ERRDISP_CURCTXBAD, "processor_context_corrupt" }, { CMI_ERRDISP_RIPV_INVALID, "return_ip_invalid" }, { CMI_ERRDISP_UC_UNCONSTRAINED, "unconstrained" }, { CMI_ERRDISP_FORCEFATAL, "forcefatal" }, { CMI_ERRDISP_IGNORED, "ignored" }, { CMI_ERRDISP_PCC_CLEARED, "corrupt_context_cleared" }, { CMI_ERRDISP_UC_CLEARED, "uncorrected_data_cleared" }, { CMI_ERRDISP_POISONED, "poisoned" }, { CMI_ERRDISP_INCONSISTENT, "telemetry_unstable" }, }; for (i = 0; i < sizeof (disp_names) / sizeof (struct _gcpu_disp_name); i++) { if ((gbl->gbl_disp & disp_names[i].dv) == 0) continue; (void) snprintf(p, (uintptr_t)q - (uintptr_t)p, "%s%s", empty ? "" : ",", disp_names[i].dn); p += strlen(p); empty = 0; } if (p != buf) fm_payload_set(ereport, FM_EREPORT_PAYLOAD_NAME_DISP, DATA_TYPE_STRING, buf, NULL); } /* * If MCG_STATUS is included add that and an indication of whether * this ereport was the result of a machine check or poll. */ if (members & FM_EREPORT_PAYLOAD_FLAG_MCG_STATUS) { fm_payload_set(ereport, FM_EREPORT_PAYLOAD_NAME_MCG_STATUS, DATA_TYPE_UINT64, mcg, NULL); fm_payload_set(ereport, FM_EREPORT_PAYLOAD_NAME_MCG_STATUS_MCIP, DATA_TYPE_BOOLEAN_VALUE, mcip ? B_TRUE : B_FALSE, NULL); } /* * If an instruction pointer is to be included add one provided * MCG_STATUS indicated it is valid; meaningless for polled events. */ if (mcip && members & FM_EREPORT_PAYLOAD_FLAG_IP && mcg & MCG_STATUS_EIPV) { fm_payload_set(ereport, FM_EREPORT_PAYLOAD_NAME_IP, DATA_TYPE_UINT64, gcl->gcl_ip, NULL); } /* * Add an indication of whether the trap occured during privileged code. */ if (mcip && members & FM_EREPORT_PAYLOAD_FLAG_PRIV) { fm_payload_set(ereport, FM_EREPORT_PAYLOAD_NAME_PRIV, DATA_TYPE_BOOLEAN_VALUE, gcl->gcl_flags & GCPU_GCL_F_PRIV ? B_TRUE : B_FALSE, NULL); } /* * If requested, add the index of the MCA bank. This indicates the * n'th bank of 4 MCA registers, and does not necessarily correspond * to MCi_* - use the bank offset to correlate */ if (members & FM_EREPORT_PAYLOAD_FLAG_BANK_NUM) { fm_payload_set(ereport, /* Bank number */ FM_EREPORT_PAYLOAD_NAME_BANK_NUM, DATA_TYPE_UINT8, bankno, /* Offset of MCi_CTL */ FM_EREPORT_PAYLOAD_NAME_BANK_MSR_OFFSET, DATA_TYPE_UINT64, IA32_MSR_MC(bankno, CTL), NULL); } /* * Add MCi_STATUS if requested, and decode it. */ if (members & FM_EREPORT_PAYLOAD_FLAG_MC_STATUS) { const char *tbes[] = { "No tracking", /* 00 */ "Green - below threshold", /* 01 */ "Yellow - above threshold", /* 10 */ "Reserved" /* 11 */ }; fm_payload_set(ereport, /* Bank MCi_STATUS */ FM_EREPORT_PAYLOAD_NAME_MC_STATUS, DATA_TYPE_UINT64, bstat, /* Overflow? */ _GCPU_BSTATUS(bstat, OVER), /* Uncorrected? */ _GCPU_BSTATUS(bstat, UC), /* Enabled? */ _GCPU_BSTATUS(bstat, EN), /* Processor context corrupt? */ _GCPU_BSTATUS(bstat, PCC), /* Error code */ FM_EREPORT_PAYLOAD_NAME_MC_STATUS_ERRCODE, DATA_TYPE_UINT16, MCAX86_ERRCODE(bstat), /* Model-specific error code */ FM_EREPORT_PAYLOAD_NAME_MC_STATUS_EXTERRCODE, DATA_TYPE_UINT16, MCAX86_MSERRCODE(bstat), NULL); /* * If MCG_CAP.TES_P indicates that that thresholding info * is present in the architural component of the bank status * then include threshold information for this bank. */ if (gcl->gcl_flags & GCPU_GCL_F_TES_P) { fm_payload_set(ereport, FM_EREPORT_PAYLOAD_NAME_MC_STATUS_TES, DATA_TYPE_STRING, tbes[MCAX86_TBES_VALUE(bstat)], NULL); } } /* * MCi_ADDR info if requested and valid. */ if (members & FM_EREPORT_PAYLOAD_FLAG_MC_ADDR && bstat & MSR_MC_STATUS_ADDRV) { fm_payload_set(ereport, FM_EREPORT_PAYLOAD_NAME_MC_ADDR, DATA_TYPE_UINT64, gbl->gbl_addr, NULL); } /* * MCi_MISC if requested and MCi_STATUS.MISCV). */ if (members & FM_EREPORT_PAYLOAD_FLAG_MC_MISC && bstat & MSR_MC_STATUS_MISCV) { fm_payload_set(ereport, FM_EREPORT_PAYLOAD_NAME_MC_MISC, DATA_TYPE_UINT64, gbl->gbl_misc, NULL); } } /* * Construct and post an ereport based on the logout information from a * single MCA bank. We are not necessarily running on the cpu that * detected the error. */ static void gcpu_ereport_post(const gcpu_logout_t *gcl, int bankidx, const gcpu_error_disp_t *ged, cms_cookie_t mscookie, uint64_t status) { gcpu_data_t *gcpu = gcl->gcl_gcpu; cmi_hdl_t hdl = gcpu->gcpu_hdl; const gcpu_bank_logout_t *gbl = &gcl->gcl_data[bankidx]; const char *cpuclass = NULL, *leafclass = NULL; uint16_t code = MCAX86_ERRCODE(status); errorq_elem_t *eqep, *scr_eqep; nvlist_t *ereport, *detector; char buf[FM_MAX_CLASS]; const char *classfmt; nv_alloc_t *nva; if (panicstr) { if ((eqep = errorq_reserve(ereport_errorq)) == NULL) return; ereport = errorq_elem_nvl(ereport_errorq, eqep); /* * Allocate another element for scratch space, but fallback * to the one we have if that fails. We'd like to use the * additional scratch space for nvlist construction. */ if ((scr_eqep = errorq_reserve(ereport_errorq)) != NULL) nva = errorq_elem_nva(ereport_errorq, scr_eqep); else nva = errorq_elem_nva(ereport_errorq, eqep); } else { ereport = fm_nvlist_create(NULL); nva = NULL; } if (ereport == NULL) return; /* * Common payload data required by the protocol: * - ereport class * - detector * - ENA */ /* * Ereport class - call into model-specific support to allow it to * provide a cpu class or leaf class, otherwise calculate our own. */ cms_ereport_class(hdl, mscookie, &cpuclass, &leafclass); classfmt = ged ? ged->ged_class_fmt : FM_EREPORT_CPU_GENERIC_UNKNOWN; gcpu_erpt_clsfmt(classfmt, buf, sizeof (buf), status, cpuclass, leafclass); /* * The detector FMRI. */ if ((detector = cms_ereport_detector(hdl, bankidx, mscookie, nva)) == NULL) detector = gcpu_fmri_create(hdl, nva); /* * Should we define a new ENA format 3?? for chip/core/strand? * It will be better when virtualized. */ fm_ereport_set(ereport, FM_EREPORT_VERSION, buf, fm_ena_generate_cpu(gcl->gcl_timestamp, cmi_hdl_chipid(hdl) << 6 | cmi_hdl_coreid(hdl) << 3 | cmi_hdl_strandid(hdl), FM_ENA_FMT1), detector, NULL); if (panicstr) { fm_nvlist_destroy(detector, FM_NVA_RETAIN); nv_alloc_reset(nva); } else { fm_nvlist_destroy(detector, FM_NVA_FREE); } /* * Add the architectural ereport class-specific payload data. */ gcpu_ereport_add_logout(ereport, gcl, bankidx, ged, code); /* * Allow model-specific code to add ereport members. */ cms_ereport_add_logout(hdl, ereport, nva, bankidx, gbl->gbl_status, gbl->gbl_addr, gbl->gbl_misc, gcl->gcl_ms_logout, mscookie); /* * Include stack if options is turned on and either selected in * the payload member bitmask or inclusion is forced. */ if (gcpu_mca_stack_flag && (cms_ereport_includestack(hdl, mscookie) == B_TRUE || gcpu_mca_stack_ereport_include)) { fm_payload_stack_add(ereport, gcl->gcl_stack, gcl->gcl_stackdepth); } /* * If injection has taken place anytime in the past then note this * on the ereport. */ if (cmi_inj_tainted() == B_TRUE) { fm_payload_set(ereport, "__injected", DATA_TYPE_BOOLEAN_VALUE, B_TRUE, NULL); } /* * Post ereport. */ if (panicstr) { errorq_commit(ereport_errorq, eqep, ERRORQ_SYNC); if (scr_eqep) errorq_cancel(ereport_errorq, scr_eqep); } else { (void) fm_ereport_post(ereport, EVCH_TRYHARD); fm_nvlist_destroy(ereport, FM_NVA_FREE); } } /*ARGSUSED*/ void gcpu_mca_drain(void *ignored, const void *data, const errorq_elem_t *eqe) { const gcpu_logout_t *gcl = data; const gcpu_bank_logout_t *gbl; int i; for (i = 0, gbl = &gcl->gcl_data[0]; i < gcl->gcl_nbanks; i++, gbl++) { const gcpu_error_disp_t *gened; cms_cookie_t mscookie; if (gbl->gbl_status & MSR_MC_STATUS_VAL && !(gbl->gbl_disp & CMI_ERRDISP_INCONSISTENT)) { uint16_t code = MCAX86_ERRCODE(gbl->gbl_status); /* * Perform a match based on IA32 MCA architectural * components alone. */ gened = gcpu_disp_match(code); /* may be NULL */ /* * Now see if an model-specific match can be made. */ mscookie = cms_disp_match(gcl->gcl_gcpu->gcpu_hdl, i, gbl->gbl_status, gbl->gbl_addr, gbl->gbl_misc, gcl->gcl_ms_logout); /* * Prepare and dispatch an ereport for logging and * diagnosis. */ gcpu_ereport_post(gcl, i, gened, mscookie, gbl->gbl_status); } else if (gbl->gbl_status & MSR_MC_STATUS_VAL && (gbl->gbl_disp & CMI_ERRDISP_INCONSISTENT)) { /* * Telemetry kept changing as we tried to read * it. Force an unknown ereport leafclass but * keep the telemetry unchanged for logging. */ gcpu_ereport_post(gcl, i, &gcpu_unknown, NULL, gbl->gbl_status); } } } static size_t gcpu_mca_queue_datasz = 0; /* * The following code is ready to make a weak attempt at growing the * errorq structure size. Since it is not foolproof (we don't know * who may already be producing to the outgoing errorq) our caller * instead assures that we'll always be called with no greater data * size than on our first call. */ static void gcpu_errorq_init(size_t datasz) { int slots; mutex_enter(&gcpu_mca_queue_lock); if (gcpu_mca_queue_datasz >= datasz) { mutex_exit(&gcpu_mca_queue_lock); return; } membar_producer(); if (gcpu_mca_queue) { gcpu_mca_queue_datasz = 0; errorq_destroy(gcpu_mca_queue); } slots = MAX(GCPU_MCA_ERRS_PERCPU * max_ncpus, GCPU_MCA_MIN_ERRORS); slots = MIN(slots, GCPU_MCA_MAX_ERRORS); gcpu_mca_queue = errorq_create("gcpu_mca_queue", gcpu_mca_drain, NULL, slots, datasz, 1, ERRORQ_VITAL); if (gcpu_mca_queue != NULL) gcpu_mca_queue_datasz = datasz; mutex_exit(&gcpu_mca_queue_lock); } /* * Perform MCA initialization as described in section 14.6 of Intel 64 * and IA-32 Architectures Software Developer's Manual Volume 3A. */ static uint_t global_nbanks; void gcpu_mca_init(cmi_hdl_t hdl) { gcpu_data_t *gcpu = cmi_hdl_getcmidata(hdl); uint64_t cap; uint_t vendor = cmi_hdl_vendor(hdl); uint_t family = cmi_hdl_family(hdl); gcpu_mca_t *mca = &gcpu->gcpu_mca; int mcg_ctl_present; uint_t nbanks; uint32_t ctl_skip_mask = 0; uint32_t status_skip_mask = 0; size_t mslsz; int i; #ifndef __xpv int mcg_ctl2_present; uint32_t cmci_capable = 0; #endif if (gcpu == NULL) return; /* * Protect from some silly /etc/system settings. */ if (gcpu_mca_telemetry_retries < 0 || gcpu_mca_telemetry_retries > 100) gcpu_mca_telemetry_retries = 5; if (cmi_hdl_rdmsr(hdl, IA32_MSR_MCG_CAP, &cap) != CMI_SUCCESS) return; /* * CPU startup code only calls cmi_mca_init if x86_feature indicates * both MCA and MCE support (i.e., X86_MCA). P5, K6, and earlier * processors, which have their own * more primitive way of doing * machine checks, will not have cmi_mca_init called since their * CPUID information will not indicate both MCA and MCE features. */ ASSERT(x86_feature & X86_MCA); /* * Determine whether the IA32_MCG_CTL register is present. If it * is we will enable all features by writing -1 to it towards * the end of this initialization; if it is absent then volume 3A * says we must nonetheless continue to initialize the individual * banks. */ mcg_ctl_present = cap & MCG_CAP_CTL_P; #ifndef __xpv mcg_ctl2_present = cap & MCG_CAP_CTL2_P; #endif /* * We squirell values away for inspection/debugging. */ mca->gcpu_mca_bioscfg.bios_mcg_cap = cap; if (mcg_ctl_present) (void) cmi_hdl_rdmsr(hdl, IA32_MSR_MCG_CTL, &mca->gcpu_mca_bioscfg.bios_mcg_ctl); /* * Determine the number of error-reporting banks implemented. */ mca->gcpu_mca_nbanks = nbanks = cap & MCG_CAP_COUNT_MASK; if (nbanks != 0 && global_nbanks == 0) global_nbanks = nbanks; /* no race - BSP will get here first */ /* * If someone is hiding the number of banks (perhaps we are fully * virtualized?) or if this processor has more banks than the * first to set global_nbanks then bail. The latter requirement * is because we need to size our errorq data structure and we * don't want to have to grow the errorq (destroy and recreate) * which may just lose some telemetry. */ if (nbanks == 0 || nbanks > global_nbanks) return; mca->gcpu_mca_bioscfg.bios_bankcfg = kmem_zalloc(nbanks * sizeof (struct gcpu_bios_bankcfg), KM_SLEEP); /* * Calculate the size we need to allocate for a gcpu_logout_t * with a gcl_data array big enough for all banks of this cpu. * Add any space requested by the model-specific logout support. */ mslsz = cms_logout_size(hdl); mca->gcpu_mca_lgsz = sizeof (gcpu_logout_t) + (nbanks - 1) * sizeof (gcpu_bank_logout_t) + mslsz; for (i = 0; i < GCPU_MCA_LOGOUT_NUM; i++) { gcpu_logout_t *gcl; mca->gcpu_mca_logout[i] = gcl = kmem_zalloc(mca->gcpu_mca_lgsz, KM_SLEEP); gcl->gcl_gcpu = gcpu; gcl->gcl_nbanks = nbanks; gcl->gcl_ms_logout = (mslsz == 0) ? NULL : (char *)(&gcl->gcl_data[0]) + nbanks * sizeof (gcpu_bank_logout_t); } #ifdef __xpv gcpu_xpv_mca_init(nbanks); #endif mca->gcpu_mca_nextpoll_idx = GCPU_MCA_LOGOUT_POLLER_1; #ifndef __xpv mca->gcpu_bank_cmci = kmem_zalloc(sizeof (gcpu_mca_cmci_t) * nbanks, KM_SLEEP); #endif /* * Create our errorq to transport the logout structures. This * can fail so users of gcpu_mca_queue must be prepared for NULL. */ gcpu_errorq_init(mca->gcpu_mca_lgsz); /* * Not knowing which, if any, banks are shared between cores we * assure serialization of MCA bank initialization by each cpu * on the chip. On chip architectures in which some banks are * shared this will mean the shared resource is initialized more * than once - we're simply aiming to avoid simultaneous MSR writes * to the shared resource. * * Even with these precautions, some platforms may yield a GP fault * if a core other than a designated master tries to write anything * but all 0's to MCi_{STATUS,ADDR,CTL}. So we will perform * those writes under on_trap protection. */ mutex_enter(&gcpu->gcpu_shared->gcpus_cfglock); /* * Initialize poller data, but don't start polling yet. */ gcpu_mca_poll_init(hdl); /* * Work out which MCA banks we will initialize. In MCA logout * code we will only read those banks which we initialize here. */ for (i = 0; i < nbanks; i++) { boolean_t skipctl = cms_bankctl_skipinit(hdl, i); boolean_t skipstatus = cms_bankstatus_skipinit(hdl, i); if (!cms_present(hdl)) { /* * Model-specific support is not present, try to use * sane defaults. * * On AMD family 6 processors, reports about spurious * machine checks indicate that bank 0 should be * skipped. * * On Intel family 6 processors, the documentation tells * us not to write to MC0_CTL. * */ if (i == 0 && family == 6) { switch (vendor) { case X86_VENDOR_AMD: skipstatus = B_TRUE; /*FALLTHRU*/ case X86_VENDOR_Intel: skipctl = B_TRUE; break; } } } ctl_skip_mask |= skipctl << i; status_skip_mask |= skipstatus << i; if (skipctl && skipstatus) continue; /* * Record which MCA banks were enabled, from the point of view * of the whole chip (if some cores share a bank we must be * sure either can logout from it). */ atomic_or_32(&gcpu->gcpu_shared->gcpus_actv_banks, 1 << i); #ifndef __xpv /* * check CMCI capability */ if (mcg_ctl2_present) { uint64_t ctl2; uint32_t cap = 0; (void) cmi_hdl_rdmsr(hdl, IA32_MSR_MC_CTL2(i), &ctl2); if (ctl2 & MSR_MC_CTL2_EN) continue; ctl2 |= MSR_MC_CTL2_EN; (void) cmi_hdl_wrmsr(hdl, IA32_MSR_MC_CTL2(i), ctl2); (void) cmi_hdl_rdmsr(hdl, IA32_MSR_MC_CTL2(i), &ctl2); mca->gcpu_bank_cmci[i].cmci_cap = cap = (ctl2 & MSR_MC_CTL2_EN) ? 1 : 0; if (cap) cmci_capable ++; /* * Set threshold to 1 while unset the en field, to avoid * CMCI trigged before APIC LVT entry init. */ ctl2 = ctl2 & (~MSR_MC_CTL2_EN) | 1; (void) cmi_hdl_wrmsr(hdl, IA32_MSR_MC_CTL2(i), ctl2); /* * init cmci related count */ mca->gcpu_bank_cmci[i].cmci_enabled = 0; mca->gcpu_bank_cmci[i].drtcmci = 0; mca->gcpu_bank_cmci[i].ncmci = 0; } #endif } #ifndef __xpv if (cmci_capable) cmi_enable_cmci = 1; #endif #ifndef __xpv /* * Log any valid telemetry lurking in the MCA banks, but do not * clear the status registers. Ignore the disposition returned - * we have already paniced or reset for any nasty errors found here. * * Intel vol 3A says that we should not do this on family 0x6, * and that for any extended family the BIOS clears things * on power-on reset so you'll only potentially find valid telemetry * on warm reset (we do it for both - on power-on reset we should * just see zeroes). * * AMD docs since K7 say we should process anything we find here. */ if (!gcpu_suppress_log_on_init && (vendor == X86_VENDOR_Intel && family >= 0xf || vendor == X86_VENDOR_AMD)) gcpu_mca_logout(hdl, NULL, -1ULL, NULL, B_FALSE, GCPU_MPT_WHAT_POKE_ERR); /* * Initialize all MCi_CTL and clear all MCi_STATUS, allowing the * model-specific module the power of veto. */ for (i = 0; i < nbanks; i++) { struct gcpu_bios_bankcfg *bcfgp = mca->gcpu_mca_bioscfg.bios_bankcfg + i; /* * Stash inherited bank MCA state, even for banks we will * not initialize ourselves. Do not read the MISC register * unconditionally - on some processors that will #GP on * banks that do not implement the MISC register (would be * caught by on_trap, anyway). */ (void) cmi_hdl_rdmsr(hdl, IA32_MSR_MC(i, CTL), &bcfgp->bios_bank_ctl); (void) cmi_hdl_rdmsr(hdl, IA32_MSR_MC(i, STATUS), &bcfgp->bios_bank_status); if (bcfgp->bios_bank_status & MSR_MC_STATUS_ADDRV) (void) cmi_hdl_rdmsr(hdl, IA32_MSR_MC(i, ADDR), &bcfgp->bios_bank_addr); /* * In some old BIOS the status value after boot can indicate * MISCV when there is actually no MISC register for * that bank. The following read could therefore * aggravate a general protection fault. This should be * caught by on_trap, but the #GP fault handler is busted * and can suffer a double fault even before we get to * trap() to check for on_trap protection. Until that * issue is fixed we remove the one access that we know * can cause a #GP. * * if (bcfgp->bios_bank_status & MSR_MC_STATUS_MISCV) * (void) cmi_hdl_rdmsr(hdl, IA32_MSR_MC(i, MISC), * &bcfgp->bios_bank_misc); */ bcfgp->bios_bank_misc = 0; if (!(ctl_skip_mask & (1 << i))) { (void) cmi_hdl_wrmsr(hdl, IA32_MSR_MC(i, CTL), cms_bankctl_val(hdl, i, -1ULL)); } if (!(status_skip_mask & (1 << i))) { (void) cmi_hdl_wrmsr(hdl, IA32_MSR_MC(i, STATUS), cms_bankstatus_val(hdl, i, 0ULL)); } } #endif /* * Now let the model-specific support perform further initialization * of non-architectural features. */ cms_mca_init(hdl, nbanks); #ifndef __xpv (void) cmi_hdl_wrmsr(hdl, IA32_MSR_MCG_STATUS, 0ULL); membar_producer(); /* enable all machine-check features */ if (mcg_ctl_present) (void) cmi_hdl_wrmsr(hdl, IA32_MSR_MCG_CTL, cms_mcgctl_val(hdl, nbanks, -1ULL)); #endif mutex_exit(&gcpu->gcpu_shared->gcpus_cfglock); #ifndef __xpv /* enable machine-check exception in CR4 */ cmi_hdl_enable_mce(hdl); #endif } static uint64_t gcpu_mca_process(cmi_hdl_t hdl, struct regs *rp, int nerr, gcpu_data_t *gcpu, gcpu_logout_t *gcl, int ismc, gcpu_mce_status_t *mcesp) { int curctxbad = 0, unconstrained = 0, forcefatal = 0; gcpu_mca_t *mca = &gcpu->gcpu_mca; int nbanks = mca->gcpu_mca_nbanks; gcpu_mce_status_t mce; gcpu_bank_logout_t *gbl; uint64_t disp = 0; int i; if (mcesp == NULL) mcesp = &mce; mcesp->mce_nerr = nerr; mcesp->mce_npcc = mcesp->mce_npcc_ok = mcesp->mce_nuc = mcesp->mce_nuc_ok = mcesp->mce_nuc_poisoned = mcesp->mce_forcefatal = mcesp->mce_ignored = 0; /* * If this a machine check then if the return instruction pointer * is not valid the current context is lost. */ if (ismc && !(gcl->gcl_mcg_status & MCG_STATUS_RIPV)) disp |= CMI_ERRDISP_RIPV_INVALID; for (i = 0, gbl = &gcl->gcl_data[0]; i < nbanks; i++, gbl++) { uint64_t mcistatus = gbl->gbl_status; uint32_t ms_scope; int pcc, uc; int poisoned; if (!(mcistatus & MSR_MC_STATUS_VAL)) continue; if (gbl->gbl_disp & CMI_ERRDISP_INCONSISTENT) continue; pcc = (mcistatus & MSR_MC_STATUS_PCC) != 0; uc = (mcistatus & MSR_MC_STATUS_UC) != 0; mcesp->mce_npcc += pcc; mcesp->mce_nuc += uc; ms_scope = cms_error_action(hdl, ismc, i, mcistatus, gbl->gbl_addr, gbl->gbl_misc, gcl->gcl_ms_logout); if (pcc && ms_scope & CMS_ERRSCOPE_CURCONTEXT_OK) { pcc = 0; mcesp->mce_npcc_ok++; gbl->gbl_disp |= CMI_ERRDISP_PCC_CLEARED; } if (uc && ms_scope & CMS_ERRSCOPE_CLEARED_UC) { uc = 0; mcesp->mce_nuc_ok++; gbl->gbl_disp |= CMI_ERRDISP_UC_CLEARED; } if (uc) { poisoned = (ms_scope & CMS_ERRSCOPE_POISONED) != 0; if (poisoned) { mcesp->mce_nuc_poisoned++; gbl->gbl_disp |= CMI_ERRDISP_POISONED; } } if ((ms_scope & CMS_ERRSCOPE_IGNORE_ERR) == 0) { /* * We're not being instructed to ignore the error, * so apply our standard disposition logic to it. */ if (uc && !poisoned) { unconstrained++; gbl->gbl_disp |= disp | CMI_ERRDISP_UC_UNCONSTRAINED; } if (pcc && ismc) { curctxbad++; gbl->gbl_disp |= disp | CMI_ERRDISP_CURCTXBAD; } /* * Even if the above may not indicate that the error * is terminal, model-specific support may insist * that we treat it as such. Such errors wil be * fatal even if discovered via poll. */ if (ms_scope & CMS_ERRSCOPE_FORCE_FATAL) { forcefatal++; mcesp->mce_forcefatal++; gbl->gbl_disp |= disp | CMI_ERRDISP_FORCEFATAL; } } else { mcesp->mce_ignored++; gbl->gbl_disp |= disp | CMI_ERRDISP_IGNORED; } } if (unconstrained > 0) disp |= CMI_ERRDISP_UC_UNCONSTRAINED; if (curctxbad > 0) disp |= CMI_ERRDISP_CURCTXBAD; if (forcefatal > 0) disp |= CMI_ERRDISP_FORCEFATAL; if (gcpu_mca_queue != NULL) { int how; if (ismc) { how = cmi_mce_response(rp, disp) ? ERRORQ_ASYNC : /* no panic, so arrange drain */ ERRORQ_SYNC; /* panic flow will drain */ } else { how = (disp & CMI_ERRDISP_FORCEFATAL && cmi_panic_on_ue()) ? ERRORQ_SYNC : /* poller will panic */ ERRORQ_ASYNC; /* no panic */ } errorq_dispatch(gcpu_mca_queue, gcl, mca->gcpu_mca_lgsz, how); } else if (disp != 0) { gcpu_bleat(hdl, gcl); } mcesp->mce_disp = disp; return (disp); } /* * Gather error telemetry from our source, and then submit it for * processing. */ #define IS_MCE_CANDIDATE(status) (((status) & MSR_MC_STATUS_EN) != 0 && \ ((status) & (MSR_MC_STATUS_UC | MSR_MC_STATUS_PCC)) != 0) #define STATUS_EQV(s1, s2) \ (((s1) & ~MSR_MC_STATUS_OVER) == ((s2) & ~MSR_MC_STATUS_OVER)) static uint32_t gcpu_deferrred_polled_clears; #ifndef __xpv static void gcpu_cmci_logout(cmi_hdl_t hdl, int bank, gcpu_mca_cmci_t *bank_cmci_p, uint64_t status, int what) { uint64_t ctl2; if (bank_cmci_p->cmci_cap && (what == GCPU_MPT_WHAT_CYC_ERR) && (!(status & MSR_MC_STATUS_VAL) || ((status & MSR_MC_STATUS_VAL) && !(status & MSR_MC_STATUS_CEC_MASK)))) { if (!(bank_cmci_p->cmci_enabled)) { /* * when cmci is disabled, and the bank has no error or * no corrected error for * gcpu_mca_cmci_reenable_threshold consecutive polls, * turn on this bank's cmci. */ bank_cmci_p->drtcmci ++; if (bank_cmci_p->drtcmci >= gcpu_mca_cmci_reenable_threshold) { /* turn on cmci */ (void) cmi_hdl_rdmsr(hdl, IA32_MSR_MC_CTL2(bank), &ctl2); ctl2 |= MSR_MC_CTL2_EN; (void) cmi_hdl_wrmsr(hdl, IA32_MSR_MC_CTL2(bank), ctl2); /* reset counter and set flag */ bank_cmci_p->drtcmci = 0; bank_cmci_p->cmci_enabled = 1; } } else { /* * when cmci is enabled,if is in cyclic poll and the * bank has no error or no corrected error, reset ncmci * counter */ bank_cmci_p->ncmci = 0; } } } static void gcpu_cmci_throttle(cmi_hdl_t hdl, int bank, gcpu_mca_cmci_t *bank_cmci_p, int what) { uint64_t ctl2 = 0; /* * if cmci of this bank occurred beyond * gcpu_mca_cmci_throttling_threshold between 2 polls, * turn off this bank's CMCI; */ if (bank_cmci_p->cmci_enabled && what == GCPU_MPT_WHAT_CMCI_ERR) { /* if it is cmci trap, increase the count */ bank_cmci_p->ncmci++; if (bank_cmci_p->ncmci >= gcpu_mca_cmci_throttling_threshold) { /* turn off cmci */ (void) cmi_hdl_rdmsr(hdl, IA32_MSR_MC_CTL2(bank), &ctl2); ctl2 &= ~MSR_MC_CTL2_EN; (void) cmi_hdl_wrmsr(hdl, IA32_MSR_MC_CTL2(bank), ctl2); /* clear the flag and count */ bank_cmci_p->cmci_enabled = 0; bank_cmci_p->ncmci = 0; } } } #endif static void clear_mc(int first, int last, int ismc, boolean_t clrstatus, cmi_hdl_t hdl, gcpu_logout_t *gcl, gcpu_logout_t *pgcl) { int i; gcpu_bank_logout_t *gbl, *pgbl; uint64_t status; if (first < 0 || last < 0) return; for (i = first, gbl = &gcl->gcl_data[first]; i <= last; i++, gbl++) { status = gbl->gbl_status; if (status == 0) continue; if (clrstatus == B_FALSE) goto serialize; /* * For i86xpv we always clear status in order to invalidate * the interposed telemetry. * * For native machine checks we always clear status here. For * native polls we must be a little more cautious since there * is an outside chance that we may clear telemetry from a * shared MCA bank on which a sibling core is machine checking. * * For polled observations of errors that look like they may * produce a machine check (UC/PCC and ENabled, although these * do not guarantee a machine check on error occurence) * we will not clear the status at this wakeup unless * we saw the same status at the previous poll. We will * always process and log the current observations - it * is only the clearing of MCi_STATUS which may be * deferred until the next wakeup. */ if (isxpv || ismc || !IS_MCE_CANDIDATE(status)) { (void) cmi_hdl_wrmsr(hdl, IA32_MSR_MC(i, STATUS), 0ULL); goto serialize; } /* * We have a polled observation of a machine check * candidate. If we saw essentially the same status at the * last poll then clear the status now since this appears * not to be a #MC candidate after all. If we see quite * different status now then do not clear, but reconsider at * the next poll. In no actual machine check clears * the status in the interim then the status should not * keep changing forever (meaning we'd never clear it) * since before long we'll simply have latched the highest- * priority error and set the OVerflow bit. Nonetheless * we count how many times we defer clearing and after * a while insist on clearing the status. */ pgbl = &pgcl->gcl_data[i]; if (pgbl->gbl_clrdefcnt != 0) { /* We deferred clear on this bank at last wakeup */ if (STATUS_EQV(status, pgcl->gcl_data[i].gbl_status) || pgbl->gbl_clrdefcnt > 5) { /* * Status is unchanged so clear it now and, * since we have already logged this info, * avoid logging it again. */ gbl->gbl_status = 0; (void) cmi_hdl_wrmsr(hdl, IA32_MSR_MC(i, STATUS), 0ULL); } else { /* Record deferral for next wakeup */ gbl->gbl_clrdefcnt = pgbl->gbl_clrdefcnt + 1; } } else { /* Record initial deferral for next wakeup */ gbl->gbl_clrdefcnt = 1; gcpu_deferrred_polled_clears++; } serialize: { #ifdef __xpv ; #else /* * Intel Vol 3A says to execute a serializing * instruction here, ie CPUID. Well WRMSR is also * defined to be serializing, so the status clear above * should suffice. To be a good citizen, and since * some clears are deferred, we'll execute a CPUID * instruction here. */ struct cpuid_regs tmp; (void) __cpuid_insn(&tmp); #endif } } } /*ARGSUSED5*/ void gcpu_mca_logout(cmi_hdl_t hdl, struct regs *rp, uint64_t bankmask, gcpu_mce_status_t *mcesp, boolean_t clrstatus, int what) { gcpu_data_t *gcpu = cmi_hdl_getcmidata(hdl); gcpu_mca_t *mca = &gcpu->gcpu_mca; int nbanks = mca->gcpu_mca_nbanks; gcpu_bank_logout_t *gbl, *pgbl; gcpu_logout_t *gcl, *pgcl; int ismc = (rp != NULL); int ispoll = !ismc; int i, nerr = 0; cmi_errno_t err; uint64_t mcg_status; uint64_t disp; uint64_t cap; int first = -1; int last = -1; int willpanic = 0; if (cmi_hdl_rdmsr(hdl, IA32_MSR_MCG_STATUS, &mcg_status) != CMI_SUCCESS || cmi_hdl_rdmsr(hdl, IA32_MSR_MCG_CAP, &cap) != CMI_SUCCESS) { if (mcesp != NULL) mcesp->mce_nerr = mcesp->mce_disp = 0; return; } if (ismc) { gcl = mca->gcpu_mca_logout[GCPU_MCA_LOGOUT_EXCEPTION]; } else { int pidx = mca->gcpu_mca_nextpoll_idx; int ppidx = (pidx == GCPU_MCA_LOGOUT_POLLER_1) ? GCPU_MCA_LOGOUT_POLLER_2 : GCPU_MCA_LOGOUT_POLLER_1; gcl = mca->gcpu_mca_logout[pidx]; /* current logout */ pgcl = mca->gcpu_mca_logout[ppidx]; /* previous logout */ mca->gcpu_mca_nextpoll_idx = ppidx; /* switch next time */ } gcl->gcl_timestamp = gethrtime_waitfree(); gcl->gcl_mcg_status = mcg_status; gcl->gcl_ip = rp ? rp->r_pc : 0; gcl->gcl_flags = (rp && USERMODE(rp->r_cs)) ? GCPU_GCL_F_PRIV : 0; if (cap & MCG_CAP_TES_P) gcl->gcl_flags |= GCPU_GCL_F_TES_P; for (i = 0, gbl = &gcl->gcl_data[0]; i < nbanks; i++, gbl++) { uint64_t status, status2, addr, misc; int retries = gcpu_mca_telemetry_retries; gbl->gbl_status = 0; gbl->gbl_disp = 0; gbl->gbl_clrdefcnt = 0; /* * Only logout from MCA banks we have initialized from at * least one core. If a core shares an MCA bank with another * but perhaps lost the race to initialize it, then it must * still be allowed to logout from the shared bank. */ if (!(gcpu->gcpu_shared->gcpus_actv_banks & 1 << i)) continue; /* * On a poll look only at the banks we've been asked to check. */ if (rp == NULL && !(bankmask & 1 << i)) continue; if (cmi_hdl_rdmsr(hdl, IA32_MSR_MC(i, STATUS), &status) != CMI_SUCCESS) continue; #ifndef __xpv gcpu_cmci_logout(hdl, i, &mca->gcpu_bank_cmci[i], status, what); #endif retry: if (!(status & MSR_MC_STATUS_VAL)) continue; /* First and last bank that have valid status */ if (first < 0) first = i; last = i; addr = -1; misc = 0; if (status & MSR_MC_STATUS_ADDRV) (void) cmi_hdl_rdmsr(hdl, IA32_MSR_MC(i, ADDR), &addr); if (status & MSR_MC_STATUS_MISCV) (void) cmi_hdl_rdmsr(hdl, IA32_MSR_MC(i, MISC), &misc); #ifndef __xpv gcpu_cmci_throttle(hdl, i, &mca->gcpu_bank_cmci[i], what); #endif /* * Allow the model-specific code to extract bank telemetry. */ cms_bank_logout(hdl, i, status, addr, misc, gcl->gcl_ms_logout); /* * Not all cpu models assure us that the status/address/misc * data will not change during the above sequence of MSR reads, * or that it can only change by the addition of the OVerflow * bit to the status register. If the status has changed * other than in the overflow bit then we attempt to reread * for a consistent snapshot, but eventually give up and * go with what we've got. We only perform this check * for a poll - a further #MC during a #MC will reset, and * polled errors should not overwrite higher-priority * trapping errors (but could set the overflow bit). */ if (ispoll && (err = cmi_hdl_rdmsr(hdl, IA32_MSR_MC(i, STATUS), &status2)) == CMI_SUCCESS) { if (!STATUS_EQV(status, status2)) { if (retries-- > 0) { status = status2; goto retry; } else { gbl->gbl_disp |= CMI_ERRDISP_INCONSISTENT; } } } else if (ispoll && err != CMI_SUCCESS) { gbl->gbl_disp |= CMI_ERRDISP_INCONSISTENT; } nerr++; gbl->gbl_status = status; gbl->gbl_addr = addr; gbl->gbl_misc = misc; /* * For polled observation, if the count of deferred status * clears updated in the clear_mc() is nonzero and the * MCi_STATUS has not changed, the last wakeup has produced * the ereport of the error. Therefore, clear the status in * this wakeup to avoid duplicate ereport. */ pgbl = &pgcl->gcl_data[i]; if (!isxpv && ispoll && IS_MCE_CANDIDATE(status) && pgbl->gbl_clrdefcnt != 0) { if (STATUS_EQV(status, pgcl->gcl_data[i].gbl_status)) { gbl->gbl_status = 0; (void) cmi_hdl_wrmsr(hdl, IA32_MSR_MC(i, STATUS), 0ULL); } } } if (gcpu_mca_stack_flag) gcl->gcl_stackdepth = getpcstack(gcl->gcl_stack, FM_STK_DEPTH); else gcl->gcl_stackdepth = 0; /* * Decide our disposition for this error or errors, and submit for * logging and subsequent diagnosis. */ if (nerr != 0) { disp = gcpu_mca_process(hdl, rp, nerr, gcpu, gcl, ismc, mcesp); willpanic = (ismc && cmi_mce_response(rp, disp) == 0); if (!willpanic) clear_mc(first, last, ismc, clrstatus, hdl, gcl, pgcl); } else { disp = 0; if (mcesp) { mcesp->mce_nerr = mcesp->mce_disp = 0; } } /* * Clear MCG_STATUS if MCIP is set (machine check in progress). * If a second #MC had occured before now the system would have * reset. We can only do thise once gcpu_mca_process has copied * the logout structure. */ if (ismc && mcg_status & MCG_STATUS_MCIP) (void) cmi_hdl_wrmsr(hdl, IA32_MSR_MCG_STATUS, 0); /* * At this point we have read and logged all telemetry that is visible * under the MCA. On architectures for which the NorthBridge is * on-chip this may include NB-observed errors, but where the NB * is off chip it may have been the source of the #MC request and * so we must call into the memory-controller driver to give it * a chance to log errors. */ if (ismc) { cmi_mc_logout(hdl, 1, willpanic); } } #ifndef __xpv int gcpu_mca_trap_vomit_summary = 0; /* * On a native machine check exception we come here from mcetrap via * cmi_mca_trap. A machine check on one cpu of a chip does not trap others * cpus of the chip, so it is possible that another cpu on this chip could * initiate a poll while we're in the #mc handler; it is also possible that * this trap has occured during a poll on this cpu. So we must acquire * the chip-wide poll lock, but be careful to avoid deadlock. * * The 'data' pointer cannot be NULL due to init order. */ uint64_t gcpu_mca_trap(cmi_hdl_t hdl, struct regs *rp) { gcpu_data_t *gcpu = cmi_hdl_getcmidata(hdl); kmutex_t *poll_lock = NULL; gcpu_mce_status_t mce; uint64_t mcg_status; int tooklock = 0; if (cmi_hdl_rdmsr(hdl, IA32_MSR_MCG_STATUS, &mcg_status) != CMI_SUCCESS || !(mcg_status & MCG_STATUS_MCIP)) return (0); /* * Synchronize with any poller from another core that may happen * to share access to one or more of the MCA banks. */ if (gcpu->gcpu_shared != NULL) poll_lock = &gcpu->gcpu_shared->gcpus_poll_lock; if (poll_lock != NULL && !mutex_owned(poll_lock)) { /* * The lock is not owned by the thread we have * interrupted. Spin for this adaptive lock. */ while (!mutex_tryenter(poll_lock)) { while (mutex_owner(poll_lock) != NULL) ; } tooklock = 1; } gcpu_mca_logout(hdl, rp, 0, &mce, B_TRUE, GCPU_MPT_WHAT_MC_ERR); if (tooklock) mutex_exit(poll_lock); /* * gcpu_mca_trap_vomit_summary may be set for debug assistance. */ if (mce.mce_nerr != 0 && gcpu_mca_trap_vomit_summary) { cmn_err(CE_WARN, "MCE: %u errors, disp=0x%llx, " "%u PCC (%u ok), " "%u UC (%d ok, %u poisoned), " "%u forcefatal, %u ignored", mce.mce_nerr, (u_longlong_t)mce.mce_disp, mce.mce_npcc, mce.mce_npcc_ok, mce.mce_nuc, mce.mce_nuc_ok, mce.mce_nuc_poisoned, mce.mce_forcefatal, mce.mce_ignored); } return (mce.mce_disp); } #endif /*ARGSUSED*/ void gcpu_faulted_enter(cmi_hdl_t hdl) { /* Nothing to do here */ } /*ARGSUSED*/ void gcpu_faulted_exit(cmi_hdl_t hdl) { gcpu_data_t *gcpu = cmi_hdl_getcmidata(hdl); gcpu->gcpu_mca.gcpu_mca_flags |= GCPU_MCA_F_UNFAULTING; } /* * Write the requested values to the indicated MSRs. Having no knowledge * of the model-specific requirements for writing to these model-specific * registers, we will only blindly write to those MSRs if the 'force' * argument is nonzero. That option should only be used in prototyping * and debugging. */ /*ARGSUSED*/ cmi_errno_t gcpu_msrinject(cmi_hdl_t hdl, cmi_mca_regs_t *regs, uint_t nregs, int force) { int i, errs = 0; for (i = 0; i < nregs; i++) { uint_t msr = regs[i].cmr_msrnum; uint64_t val = regs[i].cmr_msrval; if (cms_present(hdl)) { if (cms_msrinject(hdl, msr, val) != CMS_SUCCESS) errs++; } else if (force) { errs += (cmi_hdl_wrmsr(hdl, msr, val) != CMI_SUCCESS); } else { errs++; } } return (errs == 0 ? CMI_SUCCESS : CMIERR_UNKNOWN); }