| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* This file is part of the coreboot project. */ |
| |
| #include <bootstate.h> |
| #include <cbmem.h> |
| #include <console/console.h> |
| #include <cpu/x86/name.h> |
| #include <cpu/x86/msr.h> |
| #include <cpu/x86/lapic.h> |
| #include <acpi/acpi.h> |
| #include <arch/bert_storage.h> |
| #include <string.h> |
| |
| /* BERT region management: Allow the chipset to determine the specific |
| * location of the BERT region. We find that base and size, then manage |
| * the allocation of error information within it. |
| * |
| * Use simple static variables for managing the BERT region. This is a thin |
| * implementation; it is only created and consumed by coreboot, and only in |
| * a single stage, and we don't want its information to survive reboot or |
| * resume cycles. If the requirements change, consider using IMD to help |
| * manage the space. |
| */ |
| static int bert_region_broken; |
| static void *bert_region_base; |
| static size_t bert_region_size; |
| static size_t bert_region_used; |
| |
| /* Calculate the remaining space in the BERT region. This knowledge may help |
| * the caller prioritize the information to store. |
| */ |
| size_t bert_storage_remaining(void) |
| { |
| return bert_region_broken ? 0 : bert_region_size - bert_region_used; |
| } |
| |
| int bert_errors_present(void) |
| { |
| return bert_region_broken ? 0 : !!bert_region_used; |
| } |
| |
| void bert_errors_region(void **start, size_t *size) |
| { |
| if (bert_region_broken) { |
| *start = NULL; |
| *size = 0; |
| return; |
| } |
| |
| /* No metadata, etc. with our region, so this is easy */ |
| *start = bert_region_base; |
| *size = bert_region_used; |
| } |
| |
| static void *bert_allocate_storage(size_t size) |
| { |
| size_t alloc; |
| |
| if (bert_region_broken) |
| return NULL; |
| if (bert_region_used + size > bert_region_size) |
| return NULL; |
| |
| alloc = bert_region_used; |
| bert_region_used += size; |
| |
| return (void *)((u8 *)bert_region_base + alloc); |
| } |
| |
| /* Generic Error Status: Each Status represents a unique error event within |
| * the BERT errors region. Each event may have multiple errors associated |
| * with it. |
| */ |
| |
| /* Find the nth (1-based) Generic Data Structure attached to an Error Status */ |
| static void *acpi_hest_generic_data_nth( |
| acpi_generic_error_status_t *status, int num) |
| { |
| acpi_hest_generic_data_v300_t *ptr; |
| size_t struct_size; |
| |
| if (!num || num > bert_entry_count(status)) |
| return NULL; |
| |
| ptr = (acpi_hest_generic_data_v300_t *)(status + 1); |
| while (--num) { |
| if (ptr->revision == HEST_GENERIC_ENTRY_V300) |
| struct_size = sizeof(acpi_hest_generic_data_v300_t); |
| else |
| struct_size = sizeof(acpi_hest_generic_data_t); |
| ptr = (acpi_hest_generic_data_v300_t *)( |
| (u8 *)ptr |
| + ptr->data_length |
| + struct_size); |
| } |
| return ptr; |
| } |
| |
| /* Update data_length for this Error Status, and final Data Entry it contains */ |
| static void revise_error_sizes(acpi_generic_error_status_t *status, size_t size) |
| { |
| acpi_hest_generic_data_v300_t *entry; |
| int entries; |
| |
| if (!status) |
| return; |
| |
| entries = bert_entry_count(status); |
| entry = acpi_hest_generic_data_nth(status, entries); |
| status->data_length += size; |
| if (entry) |
| entry->data_length += size; |
| } |
| |
| /* Create space for a new BERT Generic Error Status Block, by finding the next |
| * available slot and moving the ending location. There is nothing to designate |
| * this as another Generic Error Status Block (e.g. no signature); only that it |
| * is within the BERT region. |
| * |
| * It is up to the caller to correctly fill the information, including status |
| * and error severity, and to update/maintain data offsets and lengths as |
| * entries are added. |
| */ |
| static acpi_generic_error_status_t *new_bert_status(void) |
| { |
| acpi_generic_error_status_t *status; |
| |
| status = bert_allocate_storage(sizeof(*status)); |
| |
| if (!status) { |
| printk(BIOS_ERR, "Error: New BERT error entry would exceed available region\n"); |
| return NULL; |
| } |
| |
| status->error_severity = ACPI_GENERROR_SEV_NONE; |
| return status; |
| } |
| |
| /* Generic Error Data: Each Generic Error Status may contain zero or more |
| * Generic Error Data structures. The data structures describe particular |
| * error(s) associated with an event. The definition for the structure is |
| * found in the ACPI spec, however the data types and any accompanying data |
| * definitions are in the Common Platform Error Record appendix of the UEFI |
| * spec. |
| */ |
| |
| /* Create space for a new BERT Generic Data Entry. Update the count and |
| * data length in the parent Generic Error Status Block. Version 0x300 of |
| * the structure is used, and the timestamp is filled and marked precise |
| * (i.e. assumed close enough for reporting). |
| * |
| * It is up to the caller to fill the Section Type field and add the Common |
| * Platform Error Record type data as appropriate. In addition, the caller |
| * should update the error severity, and may optionally add FRU information |
| * or override any existing information. |
| */ |
| static acpi_hest_generic_data_v300_t *new_generic_error_entry( |
| acpi_generic_error_status_t *status) |
| { |
| acpi_hest_generic_data_v300_t *entry; |
| |
| if (bert_entry_count(status) == GENERIC_ERR_STS_ENTRY_COUNT_MAX) { |
| printk(BIOS_ERR, "Error: New BERT error would exceed maximum entries\n"); |
| return NULL; |
| } |
| |
| entry = bert_allocate_storage(sizeof(*entry)); |
| if (!entry) { |
| printk(BIOS_ERR, "Error: New BERT error entry would exceed available region\n"); |
| return NULL; |
| } |
| |
| entry->revision = HEST_GENERIC_ENTRY_V300; |
| |
| entry->timestamp = cper_timestamp(CPER_TIMESTAMP_PRECISE); |
| entry->validation_bits |= ACPI_GENERROR_VALID_TIMESTAMP; |
| |
| status->data_length += sizeof(*entry); |
| bert_bump_entry_count(status); |
| |
| return entry; |
| } |
| |
| /* Find the size of a CPER error section w/o any add-ons */ |
| static size_t sizeof_error_section(guid_t *guid) |
| { |
| if (!guidcmp(guid, &CPER_SEC_PROC_GENERIC_GUID)) |
| return sizeof(cper_proc_generic_error_section_t); |
| else if (!guidcmp(guid, &CPER_SEC_PROC_IA32X64_GUID)) |
| return sizeof(cper_ia32x64_proc_error_section_t); |
| /* else if ... sizeof(structures not yet defined) */ |
| |
| printk(BIOS_ERR, "Error: Requested size of unrecognized CPER GUID\n"); |
| return 0; |
| } |
| |
| /* Append a new ACPI Generic Error Data Entry plus CPER Error Section to an |
| * existing ACPI Generic Error Status Block. The caller is responsible for |
| * the setting the status and entry severity, as well as populating all fields |
| * of the error section. |
| */ |
| acpi_hest_generic_data_v300_t *bert_append_error_datasection( |
| acpi_generic_error_status_t *status, guid_t *guid) |
| { |
| acpi_hest_generic_data_v300_t *entry; |
| void *sect; |
| size_t sect_size; |
| |
| sect_size = sizeof_error_section(guid); |
| if (!sect_size) |
| return NULL; /* Don't allocate structure if bad GUID passed */ |
| |
| if (sizeof(*entry) + sect_size > bert_storage_remaining()) |
| return NULL; |
| |
| entry = new_generic_error_entry(status); |
| if (!entry) |
| return NULL; |
| |
| /* error section immediately follows the Generic Error Data Entry */ |
| sect = bert_allocate_storage(sect_size); |
| if (!sect) |
| return NULL; |
| |
| revise_error_sizes(status, sect_size); |
| |
| guidcpy(&entry->section_type, guid); |
| return entry; |
| } |
| |
| /* Helper to append an ACPI Generic Error Data Entry plus a CPER Processor |
| * Generic Error Section. As many fields are populated as possible for the |
| * caller. |
| */ |
| acpi_hest_generic_data_v300_t *bert_append_genproc( |
| acpi_generic_error_status_t *status) |
| { |
| acpi_hest_generic_data_v300_t *entry; |
| cper_proc_generic_error_section_t *ges; |
| |
| entry = bert_append_error_datasection(status, |
| &CPER_SEC_PROC_GENERIC_GUID); |
| if (!entry) |
| return NULL; |
| |
| status->block_status |= GENERIC_ERR_STS_UNCORRECTABLE_VALID; |
| status->error_severity = ACPI_GENERROR_SEV_FATAL; |
| |
| entry->error_severity = ACPI_GENERROR_SEV_FATAL; |
| |
| ges = section_of_acpientry(ges, entry); |
| |
| ges->proc_type = GENPROC_PROCTYPE_IA32X64; |
| ges->validation |= GENPROC_VALID_PROC_TYPE; |
| |
| ges->cpu_version = cpuid_eax(1); |
| ges->validation |= GENPROC_VALID_CPU_VERSION; |
| |
| fill_processor_name(ges->cpu_brand_string); |
| ges->validation |= GENPROC_VALID_CPU_BRAND; |
| |
| ges->proc_id = lapicid(); |
| ges->validation |= GENPROC_VALID_CPU_ID; |
| |
| return entry; |
| } |
| |
| /* Add a new IA32/X64 Processor Context Structure (Table 261), following any |
| * other contexts, to an existing Processor Error Section (Table 255). Contexts |
| * may only be added after the entire Processor Error Info array has been |
| * created. |
| * |
| * This function fills only the minimal amount of information required to parse |
| * or step through the contexts. The type is filled and PROC_CONTEXT_INFO_NUM |
| * is updated. |
| * |
| * type is one of: |
| * CPER_IA32X64_CTX_UNCL |
| * CPER_IA32X64_CTX_MSR |
| * CPER_IA32X64_CTX_32BIT_EX |
| * CPER_IA32X64_CTX_64BIT_EX |
| * CPER_IA32X64_CTX_FXSAVE |
| * CPER_IA32X64_CTX_32BIT_DBG |
| * CPER_IA32X64_CTX_64BIT_DBG |
| * CPER_IA32X64_CTX_MEMMAPPED |
| * num is the number of bytes eventually used to fill the context's register |
| * array, e.g. 4 MSRs * sizeof(msr_t) |
| * |
| * status and entry data_length values are updated. |
| */ |
| cper_ia32x64_context_t *new_cper_ia32x64_ctx( |
| acpi_generic_error_status_t *status, |
| cper_ia32x64_proc_error_section_t *x86err, int type, int num) |
| { |
| size_t size; |
| cper_ia32x64_context_t *ctx; |
| static const char * const ctx_names[] = { |
| "Unclassified Data", |
| "MSR Registers", |
| "32-bit Mode Execution", |
| "64-bit Mode Execution", |
| "FXSAVE", |
| "32-bit Mode Debug", |
| "64-bit Mode Debug", |
| "Memory Mapped" |
| }; |
| |
| if (type > CPER_IA32X64_CTX_MEMMAPPED) |
| return NULL; |
| |
| if (cper_ia32x64_proc_num_ctxs(x86err) == I32X64SEC_VALID_CTXNUM_MAX) { |
| printk(BIOS_ERR, "Error: New IA32X64 %s context entry would exceed max allowable contexts\n", |
| ctx_names[type]); |
| return NULL; |
| } |
| |
| size = cper_ia32x64_ctx_sz_bytype(type, num); |
| ctx = bert_allocate_storage(size); |
| if (!ctx) { |
| printk(BIOS_ERR, "Error: New IA32X64 %s context entry would exceed available region\n", |
| ctx_names[type]); |
| return NULL; |
| } |
| |
| revise_error_sizes(status, size); |
| |
| ctx->type = type; |
| ctx->array_size = num; |
| cper_bump_ia32x64_ctx_count(x86err); |
| |
| return ctx; |
| } |
| |
| /* Add a new IA32/X64 Processor Error Information Structure (Table 256), |
| * following any other errors, to an existing Processor Error Section |
| * (Table 255). All error structures must be added before any contexts are |
| * added. |
| * |
| * This function fills only the minimal amount of information required to parse |
| * or step through the errors. The type is filled and PROC_ERR_INFO_NUM is |
| * updated. |
| */ |
| cper_ia32x64_proc_error_info_t *new_cper_ia32x64_check( |
| acpi_generic_error_status_t *status, |
| cper_ia32x64_proc_error_section_t *x86err, |
| enum cper_x86_check_type type) |
| { |
| cper_ia32x64_proc_error_info_t *check; |
| static const char * const check_names[] = { |
| "cache", |
| "TLB", |
| "bus", |
| "MS" |
| }; |
| const guid_t check_guids[] = { |
| X86_PROCESSOR_CACHE_CHK_ERROR_GUID, |
| X86_PROCESSOR_TLB_CHK_ERROR_GUID, |
| X86_PROCESSOR_BUS_CHK_ERROR_GUID, |
| X86_PROCESSOR_MS_CHK_ERROR_GUID |
| }; |
| |
| if (type > X86_PROCESSOR_CHK_MAX) |
| return NULL; |
| |
| if (cper_ia32x64_proc_num_chks(x86err) == I32X64SEC_VALID_ERRNUM_MAX) { |
| printk(BIOS_ERR, "Error: New IA32X64 %s check entry would exceed max allowable errors\n", |
| check_names[type]); |
| return NULL; |
| } |
| |
| check = bert_allocate_storage(sizeof(*check)); |
| if (!check) { |
| printk(BIOS_ERR, "Error: New IA32X64 %s check entry would exceed available region\n", |
| check_names[type]); |
| return NULL; |
| } |
| |
| revise_error_sizes(status, sizeof(*check)); |
| |
| guidcpy(&check->type, &check_guids[type]); |
| cper_bump_ia32x64_chk_count(x86err); |
| |
| return check; |
| } |
| |
| /* Helper to append an ACPI Generic Error Data Entry plus a CPER IA32/X64 |
| * Processor Error Section. As many fields are populated as possible for the |
| * caller. |
| */ |
| acpi_hest_generic_data_v300_t *bert_append_ia32x64( |
| acpi_generic_error_status_t *status) |
| { |
| acpi_hest_generic_data_v300_t *entry; |
| cper_ia32x64_proc_error_section_t *ipe; |
| struct cpuid_result id; |
| |
| entry = bert_append_error_datasection(status, |
| &CPER_SEC_PROC_IA32X64_GUID); |
| if (!entry) |
| return NULL; |
| |
| status->block_status |= GENERIC_ERR_STS_UNCORRECTABLE_VALID; |
| status->error_severity = ACPI_GENERROR_SEV_FATAL; |
| |
| entry->error_severity = ACPI_GENERROR_SEV_FATAL; |
| |
| ipe = section_of_acpientry(ipe, entry); |
| |
| ipe->apicid = lapicid(); |
| ipe->validation |= I32X64SEC_VALID_LAPIC; |
| |
| id = cpuid(1); |
| ipe->cpuid[0] = id.eax; |
| ipe->cpuid[1] = id.ebx; |
| ipe->cpuid[2] = id.ecx; |
| ipe->cpuid[3] = id.edx; |
| ipe->validation |= I32X64SEC_VALID_CPUID; |
| |
| return entry; |
| } |
| |
| static const char * const generic_error_types[] = { |
| "PROCESSOR_GENERIC", |
| "PROCESSOR_SPECIFIC_X86", |
| "PROCESSOR_SPECIFIC_ARM", |
| "PLATFORM_MEMORY", |
| "PLATFORM_MEMORY2", |
| "PCIE", |
| "FW_ERROR_RECORD", |
| "PCI_PCIX_BUS", |
| "PCI_DEVICE", |
| "DMAR_GENERIC", |
| "DIRECTED_IO_DMAR", |
| "IOMMU_DMAR", |
| "UNRECOGNIZED" |
| }; |
| |
| static const char *generic_error_name(guid_t *guid) |
| { |
| if (!guidcmp(guid, &CPER_SEC_PROC_GENERIC_GUID)) |
| return generic_error_types[0]; |
| if (!guidcmp(guid, &CPER_SEC_PROC_IA32X64_GUID)) |
| return generic_error_types[1]; |
| if (!guidcmp(guid, &CPER_SEC_PROC_ARM_GUID)) |
| return generic_error_types[2]; |
| if (!guidcmp(guid, &CPER_SEC_PLATFORM_MEM_GUID)) |
| return generic_error_types[3]; |
| if (!guidcmp(guid, &CPER_SEC_PLATFORM_MEM2_GUID)) |
| return generic_error_types[4]; |
| if (!guidcmp(guid, &CPER_SEC_PCIE_GUID)) |
| return generic_error_types[5]; |
| if (!guidcmp(guid, &CPER_SEC_FW_ERR_REC_REF_GUID)) |
| return generic_error_types[6]; |
| if (!guidcmp(guid, &CPER_SEC_PCI_X_BUS_GUID)) |
| return generic_error_types[7]; |
| if (!guidcmp(guid, &CPER_SEC_PCI_DEV_GUID)) |
| return generic_error_types[8]; |
| if (!guidcmp(guid, &CPER_SEC_DMAR_GENERIC_GUID)) |
| return generic_error_types[9]; |
| if (!guidcmp(guid, &CPER_SEC_DMAR_VT_GUID)) |
| return generic_error_types[10]; |
| if (!guidcmp(guid, &CPER_SEC_DMAR_IOMMU_GUID)) |
| return generic_error_types[11]; |
| return generic_error_types[12]; |
| } |
| |
| /* Add a new event to the BERT region. An event consists of an ACPI Error |
| * Status Block, a Generic Error Data Entry, and an associated CPER Error |
| * Section. |
| */ |
| acpi_generic_error_status_t *bert_new_event(guid_t *guid) |
| { |
| size_t size; |
| acpi_generic_error_status_t *status; |
| acpi_hest_generic_data_v300_t *entry, *r; |
| |
| size = sizeof(*status); |
| size += sizeof(*entry); |
| size += sizeof_error_section(guid); |
| |
| if (size > bert_storage_remaining()) { |
| printk(BIOS_ERR, "Error: Not enough BERT region space to add event for type %s\n", |
| generic_error_name(guid)); |
| return NULL; |
| } |
| |
| status = new_bert_status(); |
| if (!status) |
| return NULL; |
| |
| if (!guidcmp(guid, &CPER_SEC_PROC_GENERIC_GUID)) |
| r = bert_append_genproc(status); |
| else if (!guidcmp(guid, &CPER_SEC_PROC_GENERIC_GUID)) |
| r = bert_append_ia32x64(status); |
| /* else if other types not implemented */ |
| else |
| r = NULL; |
| |
| if (r) |
| return status; |
| return NULL; |
| } |
| |
| /* Helper to add an MSR context to an existing IA32/X64-type error entry */ |
| cper_ia32x64_context_t *cper_new_ia32x64_context_msr( |
| acpi_generic_error_status_t *status, |
| cper_ia32x64_proc_error_section_t *x86err, u32 addr, int num) |
| { |
| cper_ia32x64_context_t *ctx; |
| int i; |
| msr_t *dest; |
| |
| ctx = new_cper_ia32x64_ctx(status, x86err, CPER_IA32X64_CTX_MSR, num); |
| if (!ctx) |
| return NULL; |
| |
| /* already filled ctx->type = CPER_IA32X64_CTX_MSR; */ |
| ctx->msr_addr = addr; |
| ctx->array_size = num * sizeof(msr_t); |
| |
| dest = (msr_t *)((u8 *)(ctx + 1)); /* point to the Register Array */ |
| |
| for (i = 0 ; i < num ; i++) |
| *(dest + i) = rdmsr(addr + i); |
| return ctx; |
| } |
| |
| /* The region must be in memory marked as reserved. If not implemented, |
| * skip generating the information in the region. |
| */ |
| __weak void bert_reserved_region(void **start, size_t *size) |
| { |
| printk(BIOS_ERR, "Error: %s not implemented. BERT region generation disabled\n", |
| __func__); |
| *start = NULL; |
| *size = 0; |
| } |
| |
| static void bert_storage_setup(int unused) |
| { |
| /* Always start with a blank bert region. Make sure nothing is |
| * maintained across reboots or resumes. |
| */ |
| bert_region_broken = 0; |
| bert_region_used = 0; |
| |
| bert_reserved_region(&bert_region_base, &bert_region_size); |
| |
| if (!bert_region_base || !bert_region_size) { |
| printk(BIOS_ERR, "Bug: Can't find/add BERT storage area\n"); |
| bert_region_broken = 1; |
| return; |
| } |
| |
| memset(bert_region_base, 0, bert_region_size); |
| } |
| |
| RAMSTAGE_CBMEM_INIT_HOOK(bert_storage_setup) |