^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) * APEI Boot Error Record Table (BERT) support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright 2011 Intel Corp.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Author: Huang Ying <ying.huang@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Under normal circumstances, when a hardware error occurs, the error
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * handler receives control and processes the error. This gives OSPM a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * chance to process the error condition, report it, and optionally attempt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * recovery. In some cases, the system is unable to process an error.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * For example, system firmware or a management controller may choose to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * reset the system or the system might experience an uncontrolled crash
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * or reset.The boot error source is used to report unhandled errors that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * occurred in a previous boot. This mechanism is described in the BERT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * table.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * For more information about BERT, please refer to ACPI Specification
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * version 4.0, section 17.3.1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #include "apei-internal.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #undef pr_fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define pr_fmt(fmt) "BERT: " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #define ACPI_BERT_PRINT_MAX_LEN 1024
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) static int bert_disable;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) static void __init bert_print_all(struct acpi_bert_region *region,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) unsigned int region_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) struct acpi_hest_generic_status *estatus =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) (struct acpi_hest_generic_status *)region;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) int remain = region_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) u32 estatus_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) while (remain >= sizeof(struct acpi_bert_region)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) estatus_len = cper_estatus_len(estatus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) if (remain < estatus_len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) pr_err(FW_BUG "Truncated status block (length: %u).\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) estatus_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) /* No more error records. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) if (!estatus->block_status)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) if (cper_estatus_check(estatus)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) pr_err(FW_BUG "Invalid error record.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) pr_info_once("Error records from previous boot:\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) if (region_len < ACPI_BERT_PRINT_MAX_LEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) cper_estatus_print(KERN_INFO HW_ERR, estatus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) pr_info_once("Max print length exceeded, table data is available at:\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) "/sys/firmware/acpi/tables/data/BERT");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) * Because the boot error source is "one-time polled" type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) * clear Block Status of current Generic Error Status Block,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) * once it's printed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) estatus->block_status = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) estatus = (void *)estatus + estatus_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) remain -= estatus_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) static int __init setup_bert_disable(char *str)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) bert_disable = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) __setup("bert_disable", setup_bert_disable);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) static int __init bert_check_table(struct acpi_table_bert *bert_tab)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) if (bert_tab->header.length < sizeof(struct acpi_table_bert) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) bert_tab->region_length < sizeof(struct acpi_bert_region))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) static int __init bert_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) struct apei_resources bert_resources;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) struct acpi_bert_region *boot_error_region;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) struct acpi_table_bert *bert_tab;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) unsigned int region_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) acpi_status status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) int rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) if (acpi_disabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) if (bert_disable) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) pr_info("Boot Error Record Table support is disabled.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) status = acpi_get_table(ACPI_SIG_BERT, 0, (struct acpi_table_header **)&bert_tab);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) if (status == AE_NOT_FOUND)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) if (ACPI_FAILURE(status)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) pr_err("get table failed, %s.\n", acpi_format_exception(status));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) rc = bert_check_table(bert_tab);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) if (rc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) pr_err(FW_BUG "table invalid.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) goto out_put_bert_tab;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) region_len = bert_tab->region_length;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) apei_resources_init(&bert_resources);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) rc = apei_resources_add(&bert_resources, bert_tab->address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) region_len, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) goto out_put_bert_tab;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) rc = apei_resources_request(&bert_resources, "APEI BERT");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) if (rc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) goto out_fini;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) boot_error_region = ioremap_cache(bert_tab->address, region_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) if (boot_error_region) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) bert_print_all(boot_error_region, region_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) iounmap(boot_error_region);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) rc = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) apei_resources_release(&bert_resources);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) out_fini:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) apei_resources_fini(&bert_resources);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) out_put_bert_tab:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) acpi_put_table((struct acpi_table_header *)bert_tab);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) late_initcall(bert_init);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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