linux/arch/x86/kernel/cpu/mce/apei.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Bridge between MCE and APEI
 *
 * On some machine, corrected memory errors are reported via APEI
 * generic hardware error source (GHES) instead of corrected Machine
 * Check. These corrected memory errors can be reported to user space
 * through /dev/mcelog via faking a corrected Machine Check, so that
 * the error memory page can be offlined by /sbin/mcelog if the error
 * count for one page is beyond the threshold.
 *
 * For fatal MCE, save MCE record into persistent storage via ERST, so
 * that the MCE record can be logged after reboot via ERST.
 *
 * Copyright 2010 Intel Corp.
 *   Author: Huang Ying <[email protected]>
 */

#include <linux/export.h>
#include <linux/kernel.h>
#include <linux/acpi.h>
#include <linux/cper.h>
#include <acpi/apei.h>
#include <acpi/ghes.h>
#include <asm/mce.h>

#include "internal.h"

void apei_mce_report_mem_error(int severity, struct cper_sec_mem_err *mem_err)
{ … }
EXPORT_SYMBOL_GPL(…);

int apei_smca_report_x86_error(struct cper_ia_proc_ctx *ctx_info, u64 lapic_id)
{ … }

#define CPER_CREATOR_MCE …
#define CPER_SECTION_TYPE_MCE …

/*
 * CPER specification (in UEFI specification 2.3 appendix N) requires
 * byte-packed.
 */
struct cper_mce_record { … } __packed;

int apei_write_mce(struct mce *m)
{ … }

ssize_t apei_read_mce(struct mce *m, u64 *record_id)
{ … }

/* Check whether there is record in ERST */
int apei_check_mce(void)
{ … }

int apei_clear_mce(u64 record_id)
{ … }