mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-02 16:44:10 +08:00
82664963ee
Based on 1 normalized pattern(s): this file is licensed under gplv2 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 22 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Armijn Hemel <armijn@tjaldur.nl> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190531190115.129548190@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
150 lines
3.7 KiB
C
150 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* APEI Boot Error Record Table (BERT) support
|
|
*
|
|
* Copyright 2011 Intel Corp.
|
|
* Author: Huang Ying <ying.huang@intel.com>
|
|
*
|
|
* 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/io.h>
|
|
|
|
#include "apei-internal.h"
|
|
|
|
#undef pr_fmt
|
|
#define pr_fmt(fmt) "BERT: " fmt
|
|
|
|
static int bert_disable;
|
|
|
|
static void __init bert_print_all(struct acpi_bert_region *region,
|
|
unsigned int region_len)
|
|
{
|
|
struct acpi_hest_generic_status *estatus =
|
|
(struct acpi_hest_generic_status *)region;
|
|
int remain = region_len;
|
|
u32 estatus_len;
|
|
|
|
while (remain >= sizeof(struct acpi_bert_region)) {
|
|
estatus_len = cper_estatus_len(estatus);
|
|
if (remain < estatus_len) {
|
|
pr_err(FW_BUG "Truncated status block (length: %u).\n",
|
|
estatus_len);
|
|
return;
|
|
}
|
|
|
|
/* No more error records. */
|
|
if (!estatus->block_status)
|
|
return;
|
|
|
|
if (cper_estatus_check(estatus)) {
|
|
pr_err(FW_BUG "Invalid error record.\n");
|
|
return;
|
|
}
|
|
|
|
pr_info_once("Error records from previous boot:\n");
|
|
|
|
cper_estatus_print(KERN_INFO HW_ERR, estatus);
|
|
|
|
/*
|
|
* Because the boot error source is "one-time polled" type,
|
|
* clear Block Status of current Generic Error Status Block,
|
|
* once it's printed.
|
|
*/
|
|
estatus->block_status = 0;
|
|
|
|
estatus = (void *)estatus + estatus_len;
|
|
remain -= estatus_len;
|
|
}
|
|
}
|
|
|
|
static int __init setup_bert_disable(char *str)
|
|
{
|
|
bert_disable = 1;
|
|
|
|
return 0;
|
|
}
|
|
__setup("bert_disable", setup_bert_disable);
|
|
|
|
static int __init bert_check_table(struct acpi_table_bert *bert_tab)
|
|
{
|
|
if (bert_tab->header.length < sizeof(struct acpi_table_bert) ||
|
|
bert_tab->region_length < sizeof(struct acpi_bert_region))
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __init bert_init(void)
|
|
{
|
|
struct apei_resources bert_resources;
|
|
struct acpi_bert_region *boot_error_region;
|
|
struct acpi_table_bert *bert_tab;
|
|
unsigned int region_len;
|
|
acpi_status status;
|
|
int rc = 0;
|
|
|
|
if (acpi_disabled)
|
|
return 0;
|
|
|
|
if (bert_disable) {
|
|
pr_info("Boot Error Record Table support is disabled.\n");
|
|
return 0;
|
|
}
|
|
|
|
status = acpi_get_table(ACPI_SIG_BERT, 0, (struct acpi_table_header **)&bert_tab);
|
|
if (status == AE_NOT_FOUND)
|
|
return 0;
|
|
|
|
if (ACPI_FAILURE(status)) {
|
|
pr_err("get table failed, %s.\n", acpi_format_exception(status));
|
|
return -EINVAL;
|
|
}
|
|
|
|
rc = bert_check_table(bert_tab);
|
|
if (rc) {
|
|
pr_err(FW_BUG "table invalid.\n");
|
|
return rc;
|
|
}
|
|
|
|
region_len = bert_tab->region_length;
|
|
apei_resources_init(&bert_resources);
|
|
rc = apei_resources_add(&bert_resources, bert_tab->address,
|
|
region_len, true);
|
|
if (rc)
|
|
return rc;
|
|
rc = apei_resources_request(&bert_resources, "APEI BERT");
|
|
if (rc)
|
|
goto out_fini;
|
|
boot_error_region = ioremap_cache(bert_tab->address, region_len);
|
|
if (boot_error_region) {
|
|
bert_print_all(boot_error_region, region_len);
|
|
iounmap(boot_error_region);
|
|
} else {
|
|
rc = -ENOMEM;
|
|
}
|
|
|
|
apei_resources_release(&bert_resources);
|
|
out_fini:
|
|
apei_resources_fini(&bert_resources);
|
|
|
|
return rc;
|
|
}
|
|
|
|
late_initcall(bert_init);
|