// SPDX-License-Identifier: GPL-2.0-only /* * APEI Boot Error Record Table (BERT) support * * Copyright 2011 Intel Corp. * Author: Huang Ying <[email protected]> * * Under normal circumstances, when a hardware error occurs, the error * handler receives control and processes the error. This gives OSPM a * chance to process the error condition, report it, and optionally attempt * recovery. In some cases, the system is unable to process an error. * For example, system firmware or a management controller may choose to * reset the system or the system might experience an uncontrolled crash * or reset.The boot error source is used to report unhandled errors that * occurred in a previous boot. This mechanism is described in the BERT * table. * * For more information about BERT, please refer to ACPI Specification * version 4.0, section 17.3.1 */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> #include <linux/acpi.h> #include <linux/cper.h> #include <linux/io.h> #include "apei-internal.h" #undef pr_fmt #define pr_fmt(fmt) … #define ACPI_BERT_PRINT_MAX_RECORDS … #define ACPI_BERT_PRINT_MAX_LEN … static int bert_disable __initdata; /* * Print "all" the error records in the BERT table, but avoid huge spam to * the console if the BIOS included oversize records, or too many records. * Skipping some records here does not lose anything because the full * data is available to user tools in: * /sys/firmware/acpi/tables/data/BERT */ static void __init bert_print_all(struct acpi_bert_region *region, unsigned int region_len) { … } static int __init setup_bert_disable(char *str) { … } __setup(…); static int __init bert_check_table(struct acpi_table_bert *bert_tab) { … } static int __init bert_init(void) { … } late_initcall(bert_init);
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