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* UEFI Common Platform Error Record (CPER) support
* Copyright (C) 2010, Intel Corp.
* Author: Huang Ying <>
* CPER is the format used to describe platform hardware error by
* various APEI tables, such as ERST, BERT and HEST etc.
* For more information about CPER, please refer to Appendix N of UEFI
* Specification version 2.3.
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 as published by the Free Software Foundation.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/time.h>
#include <linux/cper.h>
#include <linux/acpi.h>
#include <linux/pci.h>
#include <linux/aer.h>
* CPER record ID need to be unique even after reboot, because record
* ID is used as index for ERST storage, while CPER records from
* multiple boot may co-exist in ERST.
u64 cper_next_record_id(void)
static atomic64_t seq;
if (!atomic64_read(&seq))
atomic64_set(&seq, ((u64)get_seconds()) << 32);
return atomic64_inc_return(&seq);
static const char *cper_severity_strs[] = {
static const char *cper_severity_str(unsigned int severity)
return severity < ARRAY_SIZE(cper_severity_strs) ?
cper_severity_strs[severity] : "unknown";
* cper_print_bits - print strings for set bits
* @pfx: prefix for each line, including log level and prefix string
* @bits: bit mask
* @strs: string array, indexed by bit position
* @strs_size: size of the string array: @strs
* For each set bit in @bits, print the corresponding string in @strs.
* If the output length is longer than 80, multiple line will be
* printed, with @pfx is printed at the beginning of each line.
void cper_print_bits(const char *pfx, unsigned int bits,
const char *strs[], unsigned int strs_size)
int i, len = 0;
const char *str;
char buf[84];
for (i = 0; i < strs_size; i++) {
if (!(bits & (1U << i)))
str = strs[i];
if (!str)
if (len && len + strlen(str) + 2 > 80) {
printk("%s\n", buf);
len = 0;
if (!len)
len = snprintf(buf, sizeof(buf), "%s%s", pfx, str);
len += snprintf(buf+len, sizeof(buf)-len, ", %s", str);
if (len)
printk("%s\n", buf);
static const char *cper_proc_type_strs[] = {
static const char *cper_proc_isa_strs[] = {
static const char *cper_proc_error_type_strs[] = {
"cache error",
"TLB error",
"bus error",
"micro-architectural error",
static const char *cper_proc_op_strs[] = {
"unknown or generic",
"data read",
"data write",
"instruction execution",
static const char *cper_proc_flag_strs[] = {
"precise IP",
static void cper_print_proc_generic(const char *pfx,
const struct cper_sec_proc_generic *proc)
if (proc->validation_bits & CPER_PROC_VALID_TYPE)
printk("%s""processor_type: %d, %s\n", pfx, proc->proc_type,
proc->proc_type < ARRAY_SIZE(cper_proc_type_strs) ?
cper_proc_type_strs[proc->proc_type] : "unknown");
if (proc->validation_bits & CPER_PROC_VALID_ISA)
printk("%s""processor_isa: %d, %s\n", pfx, proc->proc_isa,
proc->proc_isa < ARRAY_SIZE(cper_proc_isa_strs) ?
cper_proc_isa_strs[proc->proc_isa] : "unknown");
if (proc->validation_bits & CPER_PROC_VALID_ERROR_TYPE) {
printk("%s""error_type: 0x%02x\n", pfx, proc->proc_error_type);
cper_print_bits(pfx, proc->proc_error_type,
if (proc->validation_bits & CPER_PROC_VALID_OPERATION)
printk("%s""operation: %d, %s\n", pfx, proc->operation,
proc->operation < ARRAY_SIZE(cper_proc_op_strs) ?
cper_proc_op_strs[proc->operation] : "unknown");
if (proc->validation_bits & CPER_PROC_VALID_FLAGS) {
printk("%s""flags: 0x%02x\n", pfx, proc->flags);
cper_print_bits(pfx, proc->flags, cper_proc_flag_strs,
if (proc->validation_bits & CPER_PROC_VALID_LEVEL)
printk("%s""level: %d\n", pfx, proc->level);
if (proc->validation_bits & CPER_PROC_VALID_VERSION)
printk("%s""version_info: 0x%016llx\n", pfx, proc->cpu_version);
if (proc->validation_bits & CPER_PROC_VALID_ID)
printk("%s""processor_id: 0x%016llx\n", pfx, proc->proc_id);
if (proc->validation_bits & CPER_PROC_VALID_TARGET_ADDRESS)
printk("%s""target_address: 0x%016llx\n",
pfx, proc->target_addr);
if (proc->validation_bits & CPER_PROC_VALID_REQUESTOR_ID)
printk("%s""requestor_id: 0x%016llx\n",
pfx, proc->requestor_id);
if (proc->validation_bits & CPER_PROC_VALID_RESPONDER_ID)
printk("%s""responder_id: 0x%016llx\n",
pfx, proc->responder_id);
if (proc->validation_bits & CPER_PROC_VALID_IP)
printk("%s""IP: 0x%016llx\n", pfx, proc->ip);
static const char *cper_mem_err_type_strs[] = {
"no error",
"single-bit ECC",
"multi-bit ECC",
"single-symbol chipkill ECC",
"multi-symbol chipkill ECC",
"master abort",
"target abort",
"parity error",
"watchdog timeout",
"invalid address",
"mirror Broken",
"memory sparing",
"scrub corrected error",
"scrub uncorrected error",
static void cper_print_mem(const char *pfx, const struct cper_sec_mem_err *mem)
if (mem->validation_bits & CPER_MEM_VALID_ERROR_STATUS)
printk("%s""error_status: 0x%016llx\n", pfx, mem->error_status);
if (mem->validation_bits & CPER_MEM_VALID_PHYSICAL_ADDRESS)
printk("%s""physical_address: 0x%016llx\n",
pfx, mem->physical_addr);
if (mem->validation_bits & CPER_MEM_VALID_PHYSICAL_ADDRESS_MASK)
printk("%s""physical_address_mask: 0x%016llx\n",
pfx, mem->physical_addr_mask);
if (mem->validation_bits & CPER_MEM_VALID_NODE)
printk("%s""node: %d\n", pfx, mem->node);
if (mem->validation_bits & CPER_MEM_VALID_CARD)
printk("%s""card: %d\n", pfx, mem->card);
if (mem->validation_bits & CPER_MEM_VALID_MODULE)
printk("%s""module: %d\n", pfx, mem->module);
if (mem->validation_bits & CPER_MEM_VALID_BANK)
printk("%s""bank: %d\n", pfx, mem->bank);
if (mem->validation_bits & CPER_MEM_VALID_DEVICE)
printk("%s""device: %d\n", pfx, mem->device);
if (mem->validation_bits & CPER_MEM_VALID_ROW)
printk("%s""row: %d\n", pfx, mem->row);
if (mem->validation_bits & CPER_MEM_VALID_COLUMN)
printk("%s""column: %d\n", pfx, mem->column);
if (mem->validation_bits & CPER_MEM_VALID_BIT_POSITION)
printk("%s""bit_position: %d\n", pfx, mem->bit_pos);
if (mem->validation_bits & CPER_MEM_VALID_REQUESTOR_ID)
printk("%s""requestor_id: 0x%016llx\n", pfx, mem->requestor_id);
if (mem->validation_bits & CPER_MEM_VALID_RESPONDER_ID)
printk("%s""responder_id: 0x%016llx\n", pfx, mem->responder_id);
if (mem->validation_bits & CPER_MEM_VALID_TARGET_ID)
printk("%s""target_id: 0x%016llx\n", pfx, mem->target_id);
if (mem->validation_bits & CPER_MEM_VALID_ERROR_TYPE) {
u8 etype = mem->error_type;
printk("%s""error_type: %d, %s\n", pfx, etype,
etype < ARRAY_SIZE(cper_mem_err_type_strs) ?
cper_mem_err_type_strs[etype] : "unknown");
static const char *cper_pcie_port_type_strs[] = {
"PCIe end point",
"legacy PCI end point",
"root port",
"upstream switch port",
"downstream switch port",
"PCIe to PCI/PCI-X bridge",
"PCI/PCI-X to PCIe bridge",
"root complex integrated endpoint device",
"root complex event collector",
static void cper_print_pcie(const char *pfx, const struct cper_sec_pcie *pcie,
const struct acpi_hest_generic_data *gdata)
struct pci_dev *dev;
if (pcie->validation_bits & CPER_PCIE_VALID_PORT_TYPE)
printk("%s""port_type: %d, %s\n", pfx, pcie->port_type,
pcie->port_type < ARRAY_SIZE(cper_pcie_port_type_strs) ?
cper_pcie_port_type_strs[pcie->port_type] : "unknown");
if (pcie->validation_bits & CPER_PCIE_VALID_VERSION)
printk("%s""version: %d.%d\n", pfx,
pcie->version.major, pcie->version.minor);
if (pcie->validation_bits & CPER_PCIE_VALID_COMMAND_STATUS)
printk("%s""command: 0x%04x, status: 0x%04x\n", pfx,
pcie->command, pcie->status);
if (pcie->validation_bits & CPER_PCIE_VALID_DEVICE_ID) {
const __u8 *p;
printk("%s""device_id: %04x:%02x:%02x.%x\n", pfx,
pcie->device_id.segment, pcie->device_id.bus,
pcie->device_id.device, pcie->device_id.function);
printk("%s""slot: %d\n", pfx,
pcie->device_id.slot >> CPER_PCIE_SLOT_SHIFT);
printk("%s""secondary_bus: 0x%02x\n", pfx,
printk("%s""vendor_id: 0x%04x, device_id: 0x%04x\n", pfx,
pcie->device_id.vendor_id, pcie->device_id.device_id);
p = pcie->device_id.class_code;
printk("%s""class_code: %02x%02x%02x\n", pfx, p[0], p[1], p[2]);
if (pcie->validation_bits & CPER_PCIE_VALID_SERIAL_NUMBER)
printk("%s""serial number: 0x%04x, 0x%04x\n", pfx,
pcie->serial_number.lower, pcie->serial_number.upper);
if (pcie->validation_bits & CPER_PCIE_VALID_BRIDGE_CONTROL_STATUS)
"%s""bridge: secondary_status: 0x%04x, control: 0x%04x\n",
pfx, pcie->bridge.secondary_status, pcie->bridge.control);
dev = pci_get_domain_bus_and_slot(pcie->device_id.segment,
pcie->device_id.bus, pcie->device_id.function);
if (!dev) {
pr_err("PCI AER Cannot get PCI device %04x:%02x:%02x.%d\n",
pcie->device_id.segment, pcie->device_id.bus,
pcie->device_id.slot, pcie->device_id.function);
if (pcie->validation_bits & CPER_PCIE_VALID_AER_INFO)
cper_print_aer(pfx, dev, gdata->error_severity,
(struct aer_capability_regs *) pcie->aer_info);
static const char *apei_estatus_section_flag_strs[] = {
"containment warning",
"threshold exceeded",
"resource not accessible",
"latent error",
static void apei_estatus_print_section(
const char *pfx, const struct acpi_hest_generic_data *gdata, int sec_no)
uuid_le *sec_type = (uuid_le *)gdata->section_type;
__u16 severity;
severity = gdata->error_severity;
printk("%s""section: %d, severity: %d, %s\n", pfx, sec_no, severity,
printk("%s""flags: 0x%02x\n", pfx, gdata->flags);
cper_print_bits(pfx, gdata->flags, apei_estatus_section_flag_strs,
if (gdata->validation_bits & CPER_SEC_VALID_FRU_ID)
printk("%s""fru_id: %pUl\n", pfx, (uuid_le *)gdata->fru_id);
if (gdata->validation_bits & CPER_SEC_VALID_FRU_TEXT)
printk("%s""fru_text: %.20s\n", pfx, gdata->fru_text);
if (!uuid_le_cmp(*sec_type, CPER_SEC_PROC_GENERIC)) {
struct cper_sec_proc_generic *proc_err = (void *)(gdata + 1);
printk("%s""section_type: general processor error\n", pfx);
if (gdata->error_data_length >= sizeof(*proc_err))
cper_print_proc_generic(pfx, proc_err);
goto err_section_too_small;
} else if (!uuid_le_cmp(*sec_type, CPER_SEC_PLATFORM_MEM)) {
struct cper_sec_mem_err *mem_err = (void *)(gdata + 1);
printk("%s""section_type: memory error\n", pfx);
if (gdata->error_data_length >= sizeof(*mem_err))
cper_print_mem(pfx, mem_err);
goto err_section_too_small;
} else if (!uuid_le_cmp(*sec_type, CPER_SEC_PCIE)) {
struct cper_sec_pcie *pcie = (void *)(gdata + 1);
printk("%s""section_type: PCIe error\n", pfx);
if (gdata->error_data_length >= sizeof(*pcie))
cper_print_pcie(pfx, pcie, gdata);
goto err_section_too_small;
} else
printk("%s""section type: unknown, %pUl\n", pfx, sec_type);
pr_err(FW_WARN "error section length is too small\n");
void apei_estatus_print(const char *pfx,
const struct acpi_hest_generic_status *estatus)
struct acpi_hest_generic_data *gdata;
unsigned int data_len, gedata_len;
int sec_no = 0;
__u16 severity;
printk("%s""APEI generic hardware error status\n", pfx);
severity = estatus->error_severity;
printk("%s""severity: %d, %s\n", pfx, severity,
data_len = estatus->data_length;
gdata = (struct acpi_hest_generic_data *)(estatus + 1);
while (data_len > sizeof(*gdata)) {
gedata_len = gdata->error_data_length;
apei_estatus_print_section(pfx, gdata, sec_no);
data_len -= gedata_len + sizeof(*gdata);
gdata = (void *)(gdata + 1) + gedata_len;
int apei_estatus_check_header(const struct acpi_hest_generic_status *estatus)
if (estatus->data_length &&
estatus->data_length < sizeof(struct acpi_hest_generic_data))
return -EINVAL;
if (estatus->raw_data_length &&
estatus->raw_data_offset < sizeof(*estatus) + estatus->data_length)
return -EINVAL;
return 0;
int apei_estatus_check(const struct acpi_hest_generic_status *estatus)
struct acpi_hest_generic_data *gdata;
unsigned int data_len, gedata_len;
int rc;
rc = apei_estatus_check_header(estatus);
if (rc)
return rc;
data_len = estatus->data_length;
gdata = (struct acpi_hest_generic_data *)(estatus + 1);
while (data_len >= sizeof(*gdata)) {
gedata_len = gdata->error_data_length;
if (gedata_len > data_len - sizeof(*gdata))
return -EINVAL;
data_len -= gedata_len + sizeof(*gdata);
gdata = (void *)(gdata + 1) + gedata_len;
if (data_len)
return -EINVAL;
return 0;