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Merge branches 'acpi-processor', 'acpi-cppc', 'acpi-apei' and 'acpi-s…
…leep'
* acpi-processor:
ACPI: enable ACPI_PROCESSOR_IDLE on ARM64
arm64: add support for ACPI Low Power Idle(LPI)
drivers: firmware: psci: initialise idle states using ACPI LPI
cpuidle: introduce CPU_PM_CPU_IDLE_ENTER macro for ARM{32, 64}
arm64: cpuidle: drop __init section marker to arm_cpuidle_init
ACPI / processor_idle: Add support for Low Power Idle(LPI) states
ACPI / processor_idle: introduce ACPI_PROCESSOR_CSTATE
* acpi-cppc:
mailbox: pcc: Add PCC request and free channel declarations
ACPI / CPPC: Prevent cpc_desc_ptr points to the invalid data
ACPI: CPPC: Return error if _CPC is invalid on a CPU
* acpi-apei:
ACPI / APEI: Add Boot Error Record Table (BERT) support
ACPI / einj: Make error paths more talkative
ACPI / einj: Convert EINJ_PFX to proper pr_fmt
* acpi-sleep:
ACPI: Execute _PTS before system reboot- Loading branch information
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,150 @@ | ||
| /* | ||
| * 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 | ||
| * | ||
| * This file is licensed under GPLv2. | ||
| * | ||
| */ | ||
|
|
||
| #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; | ||
|
|
||
| if (!estatus->block_status) | ||
| return; | ||
|
|
||
| while (remain > sizeof(struct acpi_bert_region)) { | ||
| if (cper_estatus_check(estatus)) { | ||
| pr_err(FW_BUG "Invalid error record.\n"); | ||
| return; | ||
| } | ||
|
|
||
| estatus_len = cper_estatus_len(estatus); | ||
| if (remain < estatus_len) { | ||
| pr_err(FW_BUG "Truncated status block (length: %u).\n", | ||
| estatus_len); | ||
| 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; | ||
| /* No more error records. */ | ||
| if (!estatus->block_status) | ||
| return; | ||
|
|
||
| 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 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; | ||
| if (!request_mem_region(bert_tab->address, region_len, "APEI BERT")) { | ||
| pr_err("Can't request iomem region <%016llx-%016llx>.\n", | ||
| (unsigned long long)bert_tab->address, | ||
| (unsigned long long)bert_tab->address + region_len - 1); | ||
| return -EIO; | ||
| } | ||
|
|
||
| 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; | ||
| } | ||
|
|
||
| release_mem_region(bert_tab->address, region_len); | ||
|
|
||
| return rc; | ||
| } | ||
|
|
||
| late_initcall(bert_init); |
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