^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Extended Error Log driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2013 Intel Corp.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Author: Chen, Gong <gong.chen@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/cper.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/ratelimit.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/edac.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/ras.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <asm/cpu.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <asm/mce.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include "apei/apei-internal.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <ras/ras_event.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define EXT_ELOG_ENTRY_MASK GENMASK_ULL(51, 0) /* elog entry address mask */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define EXTLOG_DSM_REV 0x0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #define EXTLOG_FN_ADDR 0x1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define FLAG_OS_OPTIN BIT(0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define ELOG_ENTRY_VALID (1ULL<<63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define ELOG_ENTRY_LEN 0x1000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #define EMCA_BUG \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) "Can not request iomem region <0x%016llx-0x%016llx> - eMCA disabled\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) struct extlog_l1_head {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) u32 ver; /* Header Version */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) u32 hdr_len; /* Header Length */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) u64 total_len; /* entire L1 Directory length including this header */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) u64 elog_base; /* MCA Error Log Directory base address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) u64 elog_len; /* MCA Error Log Directory length */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) u32 flags; /* bit 0 - OS/VMM Opt-in */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) u8 rev0[12];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) u32 entries; /* Valid L1 Directory entries per logical processor */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) u8 rev1[12];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) static u8 extlog_dsm_uuid[] __initdata = "663E35AF-CC10-41A4-88EA-5470AF055295";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) /* L1 table related physical address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) static u64 elog_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) static size_t elog_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) static u64 l1_dirbase;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) static size_t l1_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) /* L1 table related virtual address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) static void __iomem *extlog_l1_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) static void __iomem *elog_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) static void *elog_buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) static u64 *l1_entry_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static u32 l1_percpu_entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) #define ELOG_IDX(cpu, bank) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) (cpu_physical_id(cpu) * l1_percpu_entry + (bank))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) #define ELOG_ENTRY_DATA(idx) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) (*(l1_entry_base + (idx)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) #define ELOG_ENTRY_ADDR(phyaddr) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) (phyaddr - elog_base + (u8 *)elog_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) static struct acpi_hest_generic_status *extlog_elog_entry_check(int cpu, int bank)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) int idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) u64 data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) struct acpi_hest_generic_status *estatus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) WARN_ON(cpu < 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) idx = ELOG_IDX(cpu, bank);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) data = ELOG_ENTRY_DATA(idx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) if ((data & ELOG_ENTRY_VALID) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) data &= EXT_ELOG_ENTRY_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) estatus = (struct acpi_hest_generic_status *)ELOG_ENTRY_ADDR(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) /* if no valid data in elog entry, just return */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) if (estatus->block_status == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) return estatus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) static void __print_extlog_rcd(const char *pfx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) struct acpi_hest_generic_status *estatus, int cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) static atomic_t seqno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) unsigned int curr_seqno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) char pfx_seq[64];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) if (!pfx) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) if (estatus->error_severity <= CPER_SEV_CORRECTED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) pfx = KERN_INFO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) pfx = KERN_ERR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) curr_seqno = atomic_inc_return(&seqno);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) snprintf(pfx_seq, sizeof(pfx_seq), "%s{%u}", pfx, curr_seqno);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) printk("%s""Hardware error detected on CPU%d\n", pfx_seq, cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) cper_estatus_print(pfx_seq, estatus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) static int print_extlog_rcd(const char *pfx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) struct acpi_hest_generic_status *estatus, int cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) /* Not more than 2 messages every 5 seconds */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) static DEFINE_RATELIMIT_STATE(ratelimit_corrected, 5*HZ, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) static DEFINE_RATELIMIT_STATE(ratelimit_uncorrected, 5*HZ, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) struct ratelimit_state *ratelimit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) if (estatus->error_severity == CPER_SEV_CORRECTED ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) (estatus->error_severity == CPER_SEV_INFORMATIONAL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) ratelimit = &ratelimit_corrected;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) ratelimit = &ratelimit_uncorrected;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) if (__ratelimit(ratelimit)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) __print_extlog_rcd(pfx, estatus, cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) static int extlog_print(struct notifier_block *nb, unsigned long val,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) struct mce *mce = (struct mce *)data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) int bank = mce->bank;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) int cpu = mce->extcpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) struct acpi_hest_generic_status *estatus, *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) struct acpi_hest_generic_data *gdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) const guid_t *fru_id = &guid_null;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) char *fru_text = "";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) guid_t *sec_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) static u32 err_seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) estatus = extlog_elog_entry_check(cpu, bank);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) if (estatus == NULL || (mce->kflags & MCE_HANDLED_CEC))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) return NOTIFY_DONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) memcpy(elog_buf, (void *)estatus, ELOG_ENTRY_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) /* clear record status to enable BIOS to update it again */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) estatus->block_status = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) tmp = (struct acpi_hest_generic_status *)elog_buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) if (!ras_userspace_consumers()) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) print_extlog_rcd(NULL, tmp, cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) /* log event via trace */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) err_seq++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) gdata = (struct acpi_hest_generic_data *)(tmp + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) if (gdata->validation_bits & CPER_SEC_VALID_FRU_ID)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) fru_id = (guid_t *)gdata->fru_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) if (gdata->validation_bits & CPER_SEC_VALID_FRU_TEXT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) fru_text = gdata->fru_text;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) sec_type = (guid_t *)gdata->section_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) if (guid_equal(sec_type, &CPER_SEC_PLATFORM_MEM)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) struct cper_sec_mem_err *mem = (void *)(gdata + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) if (gdata->error_data_length >= sizeof(*mem))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) trace_extlog_mem_event(mem, err_seq, fru_id, fru_text,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) (u8)gdata->error_severity);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) mce->kflags |= MCE_HANDLED_EXTLOG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) return NOTIFY_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) static bool __init extlog_get_l1addr(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) guid_t guid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) acpi_handle handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) union acpi_object *obj;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) if (guid_parse(extlog_dsm_uuid, &guid))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) if (!acpi_check_dsm(handle, &guid, EXTLOG_DSM_REV, 1 << EXTLOG_FN_ADDR))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) obj = acpi_evaluate_dsm_typed(handle, &guid, EXTLOG_DSM_REV,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) EXTLOG_FN_ADDR, NULL, ACPI_TYPE_INTEGER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) if (!obj) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) l1_dirbase = obj->integer.value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) ACPI_FREE(obj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) /* Spec says L1 directory must be 4K aligned, bail out if it isn't */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) if (l1_dirbase & ((1 << 12) - 1)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) pr_warn(FW_BUG "L1 Directory is invalid at physical %llx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) l1_dirbase);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) static struct notifier_block extlog_mce_dec = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) .notifier_call = extlog_print,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) .priority = MCE_PRIO_EXTLOG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) static int __init extlog_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) struct extlog_l1_head *l1_head;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) void __iomem *extlog_l1_hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) size_t l1_hdr_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) struct resource *r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) u64 cap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) if (rdmsrl_safe(MSR_IA32_MCG_CAP, &cap) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) !(cap & MCG_ELOG_P) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) !extlog_get_l1addr())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) rc = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) /* get L1 header to fetch necessary information */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) l1_hdr_size = sizeof(struct extlog_l1_head);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) r = request_mem_region(l1_dirbase, l1_hdr_size, "L1 DIR HDR");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) if (!r) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) pr_warn(FW_BUG EMCA_BUG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) (unsigned long long)l1_dirbase,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) (unsigned long long)l1_dirbase + l1_hdr_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) extlog_l1_hdr = acpi_os_map_iomem(l1_dirbase, l1_hdr_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) l1_head = (struct extlog_l1_head *)extlog_l1_hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) l1_size = l1_head->total_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) l1_percpu_entry = l1_head->entries;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) elog_base = l1_head->elog_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) elog_size = l1_head->elog_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) acpi_os_unmap_iomem(extlog_l1_hdr, l1_hdr_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) release_mem_region(l1_dirbase, l1_hdr_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) /* remap L1 header again based on completed information */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) r = request_mem_region(l1_dirbase, l1_size, "L1 Table");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) if (!r) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) pr_warn(FW_BUG EMCA_BUG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) (unsigned long long)l1_dirbase,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) (unsigned long long)l1_dirbase + l1_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) extlog_l1_addr = acpi_os_map_iomem(l1_dirbase, l1_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) l1_entry_base = (u64 *)((u8 *)extlog_l1_addr + l1_hdr_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) /* remap elog table */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) r = request_mem_region(elog_base, elog_size, "Elog Table");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) if (!r) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) pr_warn(FW_BUG EMCA_BUG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) (unsigned long long)elog_base,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) (unsigned long long)elog_base + elog_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) goto err_release_l1_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) elog_addr = acpi_os_map_iomem(elog_base, elog_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) rc = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) /* allocate buffer to save elog record */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) elog_buf = kmalloc(ELOG_ENTRY_LEN, GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) if (elog_buf == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) goto err_release_elog;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) mce_register_decode_chain(&extlog_mce_dec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) /* enable OS to be involved to take over management from BIOS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) ((struct extlog_l1_head *)extlog_l1_addr)->flags |= FLAG_OS_OPTIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) err_release_elog:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) if (elog_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) acpi_os_unmap_iomem(elog_addr, elog_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) release_mem_region(elog_base, elog_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) err_release_l1_dir:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) if (extlog_l1_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) acpi_os_unmap_iomem(extlog_l1_addr, l1_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) release_mem_region(l1_dirbase, l1_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) pr_warn(FW_BUG "Extended error log disabled because of problems parsing f/w tables\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) static void __exit extlog_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) mce_unregister_decode_chain(&extlog_mce_dec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) ((struct extlog_l1_head *)extlog_l1_addr)->flags &= ~FLAG_OS_OPTIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) if (extlog_l1_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) acpi_os_unmap_iomem(extlog_l1_addr, l1_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) if (elog_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) acpi_os_unmap_iomem(elog_addr, elog_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) release_mem_region(elog_base, elog_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) release_mem_region(l1_dirbase, l1_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) kfree(elog_buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) module_init(extlog_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) module_exit(extlog_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) MODULE_AUTHOR("Chen, Gong <gong.chen@intel.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) MODULE_DESCRIPTION("Extended MCA Error Log Driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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