| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Chen Gong | 378 | 91.53% | 4 | 19.05% |
| Tony Luck | 5 | 1.21% | 3 | 14.29% |
| Lv Zheng | 4 | 0.97% | 1 | 4.76% |
| guoweikang | 4 | 0.97% | 1 | 4.76% |
| Linus Torvalds (pre-git) | 3 | 0.73% | 2 | 9.52% |
| Dominik Brodowski | 3 | 0.73% | 1 | 4.76% |
| Harvey Harrison | 3 | 0.73% | 1 | 4.76% |
| Mauro Carvalho Chehab | 3 | 0.73% | 1 | 4.76% |
| Andy Shevchenko | 2 | 0.48% | 1 | 4.76% |
| Borislav Petkov | 2 | 0.48% | 1 | 4.76% |
| Thomas Gleixner | 2 | 0.48% | 1 | 4.76% |
| Jiang Liu | 1 | 0.24% | 1 | 4.76% |
| Xiaochun Lee | 1 | 0.24% | 1 | 4.76% |
| Prarit Bhargava | 1 | 0.24% | 1 | 4.76% |
| Ingo Molnar | 1 | 0.24% | 1 | 4.76% |
| Total | 413 | 21 |
// SPDX-License-Identifier: GPL-2.0-only /* * Extended Error Log driver * * Copyright (C) 2013 Intel Corp. * Author: Chen, Gong <gong.chen@intel.com> */ #include <linux/module.h> #include <linux/acpi.h> #include <linux/cper.h> #include <linux/ratelimit.h> #include <linux/edac.h> #include <linux/ras.h> #include <acpi/ghes.h> #include <asm/cpu.h> #include <asm/mce.h> #include <asm/msr.h> #include "apei/apei-internal.h" #include <ras/ras_event.h> #define EXT_ELOG_ENTRY_MASK GENMASK_ULL(51, 0) /* elog entry address mask */ #define EXTLOG_DSM_REV 0x0 #define EXTLOG_FN_ADDR 0x1 #define FLAG_OS_OPTIN BIT(0) #define ELOG_ENTRY_VALID (1ULL<<63) #define ELOG_ENTRY_LEN 0x1000 #define EMCA_BUG \ "Can not request iomem region <0x%016llx-0x%016llx> - eMCA disabled\n" struct extlog_l1_head { u32 ver; /* Header Version */ u32 hdr_len; /* Header Length */ u64 total_len; /* entire L1 Directory length including this header */ u64 elog_base; /* MCA Error Log Directory base address */ u64 elog_len; /* MCA Error Log Directory length */ u32 flags; /* bit 0 - OS/VMM Opt-in */ u8 rev0[12]; u32 entries; /* Valid L1 Directory entries per logical processor */ u8 rev1[12]; }; static u8 extlog_dsm_uuid[] __initdata = "663E35AF-CC10-41A4-88EA-5470AF055295"; /* L1 table related physical address */ static u64 elog_base; static size_t elog_size; static u64 l1_dirbase; static size_t l1_size; /* L1 table related virtual address */ static void __iomem *extlog_l1_addr; static void __iomem *elog_addr; static void *elog_buf; static u64 *l1_entry_base; static u32 l1_percpu_entry; #define ELOG_IDX(cpu, bank) \ (cpu_physical_id(cpu) * l1_percpu_entry + (bank)) #define ELOG_ENTRY_DATA(idx) \ (*(l1_entry_base + (idx))) #define ELOG_ENTRY_ADDR(phyaddr) \ (phyaddr - elog_base + (u8 *)elog_addr) static struct acpi_hest_generic_status *extlog_elog_entry_check(int cpu, int bank) { int idx; u64 data; struct acpi_hest_generic_status *estatus; WARN_ON(cpu < 0); idx = ELOG_IDX(cpu, bank); data = ELOG_ENTRY_DATA(idx); if ((data & ELOG_ENTRY_VALID) == 0) return NULL; data &= EXT_ELOG_ENTRY_MASK; estatus = (struct acpi_hest_generic_status *)ELOG_ENTRY_ADDR(data); /* if no valid data in elog entry, just return */ if (estatus->block_status == 0) return NULL; return estatus; } static void __print_extlog_rcd(const char *pfx, struct acpi_hest_generic_status *estatus, int cpu) { static atomic_t seqno; unsigned int curr_seqno; char pfx_seq[64]; if (!pfx) { if (estatus->error_severity <= CPER_SEV_CORRECTED) pfx = KERN_INFO; else pfx = KERN_ERR; } curr_seqno = atomic_inc_return(&seqno); snprintf(pfx_seq, sizeof(pfx_seq), "%s{%u}", pfx, curr_seqno); printk("%s""Hardware error detected on CPU%d\n", pfx_seq, cpu); cper_estatus_print(pfx_seq, estatus); } static int print_extlog_rcd(const char *pfx, struct acpi_hest_generic_status *estatus, int cpu) { /* Not more than 2 messages every 5 seconds */ static DEFINE_RATELIMIT_STATE(ratelimit_corrected, 5*HZ, 2); static DEFINE_RATELIMIT_STATE(ratelimit_uncorrected, 5*HZ, 2); struct ratelimit_state *ratelimit; if (estatus->error_severity == CPER_SEV_CORRECTED || (estatus->error_severity == CPER_SEV_INFORMATIONAL)) ratelimit = &ratelimit_corrected; else ratelimit = &ratelimit_uncorrected; if (__ratelimit(ratelimit)) { __print_extlog_rcd(pfx, estatus, cpu); return 0; } return 1; } static int extlog_print(struct notifier_block *nb, unsigned long val, void *data) { struct mce *mce = (struct mce *)data; int bank = mce->bank; int cpu = mce->extcpu; struct acpi_hest_generic_status *estatus, *tmp; struct acpi_hest_generic_data *gdata; const guid_t *fru_id; char *fru_text; guid_t *sec_type; static u32 err_seq; estatus = extlog_elog_entry_check(cpu, bank); if (!estatus) return NOTIFY_DONE; if (mce->kflags & MCE_HANDLED_CEC) { estatus->block_status = 0; return NOTIFY_DONE; } memcpy(elog_buf, (void *)estatus, ELOG_ENTRY_LEN); /* clear record status to enable BIOS to update it again */ estatus->block_status = 0; tmp = (struct acpi_hest_generic_status *)elog_buf; if (!ras_userspace_consumers()) { print_extlog_rcd(NULL, tmp, cpu); goto out; } /* log event via trace */ err_seq++; apei_estatus_for_each_section(tmp, gdata) { if (gdata->validation_bits & CPER_SEC_VALID_FRU_ID) fru_id = (guid_t *)gdata->fru_id; else fru_id = &guid_null; if (gdata->validation_bits & CPER_SEC_VALID_FRU_TEXT) fru_text = gdata->fru_text; else fru_text = ""; sec_type = (guid_t *)gdata->section_type; if (guid_equal(sec_type, &CPER_SEC_PLATFORM_MEM)) { struct cper_sec_mem_err *mem = acpi_hest_get_payload(gdata); if (gdata->error_data_length >= sizeof(*mem)) trace_extlog_mem_event(mem, err_seq, fru_id, fru_text, (u8)gdata->error_severity); } } out: mce->kflags |= MCE_HANDLED_EXTLOG; return NOTIFY_OK; } static bool __init extlog_get_l1addr(void) { guid_t guid; acpi_handle handle; union acpi_object *obj; if (guid_parse(extlog_dsm_uuid, &guid)) return false; if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle))) return false; if (!acpi_check_dsm(handle, &guid, EXTLOG_DSM_REV, 1 << EXTLOG_FN_ADDR)) return false; obj = acpi_evaluate_dsm_typed(handle, &guid, EXTLOG_DSM_REV, EXTLOG_FN_ADDR, NULL, ACPI_TYPE_INTEGER); if (!obj) { return false; } else { l1_dirbase = obj->integer.value; ACPI_FREE(obj); } /* Spec says L1 directory must be 4K aligned, bail out if it isn't */ if (l1_dirbase & ((1 << 12) - 1)) { pr_warn(FW_BUG "L1 Directory is invalid at physical %llx\n", l1_dirbase); return false; } return true; } static struct notifier_block extlog_mce_dec = { .notifier_call = extlog_print, .priority = MCE_PRIO_EXTLOG, }; static int __init extlog_init(void) { struct extlog_l1_head *l1_head; void __iomem *extlog_l1_hdr; size_t l1_hdr_size; struct resource *r; u64 cap; int rc; if (rdmsrq_safe(MSR_IA32_MCG_CAP, &cap) || !(cap & MCG_ELOG_P) || !extlog_get_l1addr()) return -ENODEV; rc = -EINVAL; /* get L1 header to fetch necessary information */ l1_hdr_size = sizeof(struct extlog_l1_head); r = request_mem_region(l1_dirbase, l1_hdr_size, "L1 DIR HDR"); if (!r) { pr_warn(FW_BUG EMCA_BUG, (unsigned long long)l1_dirbase, (unsigned long long)l1_dirbase + l1_hdr_size); goto err; } extlog_l1_hdr = acpi_os_map_iomem(l1_dirbase, l1_hdr_size); if (!extlog_l1_hdr) { rc = -ENOMEM; goto err_release_l1_hdr; } l1_head = (struct extlog_l1_head *)extlog_l1_hdr; l1_size = l1_head->total_len; l1_percpu_entry = l1_head->entries; elog_base = l1_head->elog_base; elog_size = l1_head->elog_len; acpi_os_unmap_iomem(extlog_l1_hdr, l1_hdr_size); release_mem_region(l1_dirbase, l1_hdr_size); /* remap L1 header again based on completed information */ r = request_mem_region(l1_dirbase, l1_size, "L1 Table"); if (!r) { pr_warn(FW_BUG EMCA_BUG, (unsigned long long)l1_dirbase, (unsigned long long)l1_dirbase + l1_size); goto err; } extlog_l1_addr = acpi_os_map_iomem(l1_dirbase, l1_size); if (!extlog_l1_addr) { rc = -ENOMEM; goto err_release_l1_dir; } l1_entry_base = (u64 *)((u8 *)extlog_l1_addr + l1_hdr_size); /* remap elog table */ r = request_mem_region(elog_base, elog_size, "Elog Table"); if (!r) { pr_warn(FW_BUG EMCA_BUG, (unsigned long long)elog_base, (unsigned long long)elog_base + elog_size); goto err_release_l1_dir; } elog_addr = acpi_os_map_iomem(elog_base, elog_size); if (!elog_addr) { rc = -ENOMEM; goto err_release_elog; } rc = -ENOMEM; /* allocate buffer to save elog record */ elog_buf = kmalloc(ELOG_ENTRY_LEN, GFP_KERNEL); if (elog_buf == NULL) goto err_release_elog; mce_register_decode_chain(&extlog_mce_dec); /* enable OS to be involved to take over management from BIOS */ ((struct extlog_l1_head *)extlog_l1_addr)->flags |= FLAG_OS_OPTIN; return 0; err_release_elog: if (elog_addr) acpi_os_unmap_iomem(elog_addr, elog_size); release_mem_region(elog_base, elog_size); err_release_l1_dir: if (extlog_l1_addr) acpi_os_unmap_iomem(extlog_l1_addr, l1_size); release_mem_region(l1_dirbase, l1_size); err_release_l1_hdr: release_mem_region(l1_dirbase, l1_hdr_size); err: pr_warn(FW_BUG "Extended error log disabled because of problems parsing f/w tables\n"); return rc; } static void __exit extlog_exit(void) { mce_unregister_decode_chain(&extlog_mce_dec); if (extlog_l1_addr) { ((struct extlog_l1_head *)extlog_l1_addr)->flags &= ~FLAG_OS_OPTIN; acpi_os_unmap_iomem(extlog_l1_addr, l1_size); } if (elog_addr) acpi_os_unmap_iomem(elog_addr, elog_size); release_mem_region(elog_base, elog_size); release_mem_region(l1_dirbase, l1_size); kfree(elog_buf); } module_init(extlog_init); module_exit(extlog_exit); MODULE_AUTHOR("Chen, Gong <gong.chen@intel.com>"); MODULE_DESCRIPTION("Extended MCA Error Log Driver"); MODULE_LICENSE("GPL");