v4.19.13 snapshot.
diff --git a/drivers/firmware/efi/cper.c b/drivers/firmware/efi/cper.c
new file mode 100644
index 0000000..a7902fc
--- /dev/null
+++ b/drivers/firmware/efi/cper.c
@@ -0,0 +1,568 @@
+/*
+ * UEFI Common Platform Error Record (CPER) support
+ *
+ * Copyright (C) 2010, Intel Corp.
+ * Author: Huang Ying <ying.huang@intel.com>
+ *
+ * CPER is the format used to describe platform hardware error by
+ * various tables, such as ERST, BERT and HEST etc.
+ *
+ * For more information about CPER, please refer to Appendix N of UEFI
+ * Specification version 2.4.
+ *
+ * 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
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * 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/dmi.h>
+#include <linux/acpi.h>
+#include <linux/pci.h>
+#include <linux/aer.h>
+#include <linux/printk.h>
+#include <linux/bcd.h>
+#include <acpi/ghes.h>
+#include <ras/ras_event.h>
+
+static char rcd_decode_str[CPER_REC_LEN];
+
+/*
+ * 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)) {
+ time64_t time = ktime_get_real_seconds();
+
+ /*
+ * This code is unlikely to still be needed in year 2106,
+ * but just in case, let's use a few more bits for timestamps
+ * after y2038 to be sure they keep increasing monotonically
+ * for the next few hundred years...
+ */
+ if (time < 0x80000000)
+ atomic64_set(&seq, (ktime_get_real_seconds()) << 32);
+ else
+ atomic64_set(&seq, 0x8000000000000000ull |
+ ktime_get_real_seconds() << 24);
+ }
+
+ return atomic64_inc_return(&seq);
+}
+EXPORT_SYMBOL_GPL(cper_next_record_id);
+
+static const char * const severity_strs[] = {
+ "recoverable",
+ "fatal",
+ "corrected",
+ "info",
+};
+
+const char *cper_severity_str(unsigned int severity)
+{
+ return severity < ARRAY_SIZE(severity_strs) ?
+ severity_strs[severity] : "unknown";
+}
+EXPORT_SYMBOL_GPL(cper_severity_str);
+
+/*
+ * 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 * const 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)))
+ continue;
+ str = strs[i];
+ if (!str)
+ continue;
+ if (len && len + strlen(str) + 2 > 80) {
+ printk("%s\n", buf);
+ len = 0;
+ }
+ if (!len)
+ len = snprintf(buf, sizeof(buf), "%s%s", pfx, str);
+ else
+ len += snprintf(buf+len, sizeof(buf)-len, ", %s", str);
+ }
+ if (len)
+ printk("%s\n", buf);
+}
+
+static const char * const proc_type_strs[] = {
+ "IA32/X64",
+ "IA64",
+ "ARM",
+};
+
+static const char * const proc_isa_strs[] = {
+ "IA32",
+ "IA64",
+ "X64",
+ "ARM A32/T32",
+ "ARM A64",
+};
+
+const char * const cper_proc_error_type_strs[] = {
+ "cache error",
+ "TLB error",
+ "bus error",
+ "micro-architectural error",
+};
+
+static const char * const proc_op_strs[] = {
+ "unknown or generic",
+ "data read",
+ "data write",
+ "instruction execution",
+};
+
+static const char * const proc_flag_strs[] = {
+ "restartable",
+ "precise IP",
+ "overflow",
+ "corrected",
+};
+
+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(proc_type_strs) ?
+ 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(proc_isa_strs) ?
+ 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,
+ cper_proc_error_type_strs,
+ ARRAY_SIZE(cper_proc_error_type_strs));
+ }
+ if (proc->validation_bits & CPER_PROC_VALID_OPERATION)
+ printk("%s""operation: %d, %s\n", pfx, proc->operation,
+ proc->operation < ARRAY_SIZE(proc_op_strs) ?
+ 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, proc_flag_strs,
+ ARRAY_SIZE(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 * const mem_err_type_strs[] = {
+ "unknown",
+ "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",
+ "physical memory map-out event",
+};
+
+const char *cper_mem_err_type_str(unsigned int etype)
+{
+ return etype < ARRAY_SIZE(mem_err_type_strs) ?
+ mem_err_type_strs[etype] : "unknown";
+}
+EXPORT_SYMBOL_GPL(cper_mem_err_type_str);
+
+static int cper_mem_err_location(struct cper_mem_err_compact *mem, char *msg)
+{
+ u32 len, n;
+
+ if (!msg)
+ return 0;
+
+ n = 0;
+ len = CPER_REC_LEN - 1;
+ if (mem->validation_bits & CPER_MEM_VALID_NODE)
+ n += scnprintf(msg + n, len - n, "node: %d ", mem->node);
+ if (mem->validation_bits & CPER_MEM_VALID_CARD)
+ n += scnprintf(msg + n, len - n, "card: %d ", mem->card);
+ if (mem->validation_bits & CPER_MEM_VALID_MODULE)
+ n += scnprintf(msg + n, len - n, "module: %d ", mem->module);
+ if (mem->validation_bits & CPER_MEM_VALID_RANK_NUMBER)
+ n += scnprintf(msg + n, len - n, "rank: %d ", mem->rank);
+ if (mem->validation_bits & CPER_MEM_VALID_BANK)
+ n += scnprintf(msg + n, len - n, "bank: %d ", mem->bank);
+ if (mem->validation_bits & CPER_MEM_VALID_DEVICE)
+ n += scnprintf(msg + n, len - n, "device: %d ", mem->device);
+ if (mem->validation_bits & CPER_MEM_VALID_ROW)
+ n += scnprintf(msg + n, len - n, "row: %d ", mem->row);
+ if (mem->validation_bits & CPER_MEM_VALID_COLUMN)
+ n += scnprintf(msg + n, len - n, "column: %d ", mem->column);
+ if (mem->validation_bits & CPER_MEM_VALID_BIT_POSITION)
+ n += scnprintf(msg + n, len - n, "bit_position: %d ",
+ mem->bit_pos);
+ if (mem->validation_bits & CPER_MEM_VALID_REQUESTOR_ID)
+ n += scnprintf(msg + n, len - n, "requestor_id: 0x%016llx ",
+ mem->requestor_id);
+ if (mem->validation_bits & CPER_MEM_VALID_RESPONDER_ID)
+ n += scnprintf(msg + n, len - n, "responder_id: 0x%016llx ",
+ mem->responder_id);
+ if (mem->validation_bits & CPER_MEM_VALID_TARGET_ID)
+ scnprintf(msg + n, len - n, "target_id: 0x%016llx ",
+ mem->target_id);
+
+ msg[n] = '\0';
+ return n;
+}
+
+static int cper_dimm_err_location(struct cper_mem_err_compact *mem, char *msg)
+{
+ u32 len, n;
+ const char *bank = NULL, *device = NULL;
+
+ if (!msg || !(mem->validation_bits & CPER_MEM_VALID_MODULE_HANDLE))
+ return 0;
+
+ n = 0;
+ len = CPER_REC_LEN - 1;
+ dmi_memdev_name(mem->mem_dev_handle, &bank, &device);
+ if (bank && device)
+ n = snprintf(msg, len, "DIMM location: %s %s ", bank, device);
+ else
+ n = snprintf(msg, len,
+ "DIMM location: not present. DMI handle: 0x%.4x ",
+ mem->mem_dev_handle);
+
+ msg[n] = '\0';
+ return n;
+}
+
+void cper_mem_err_pack(const struct cper_sec_mem_err *mem,
+ struct cper_mem_err_compact *cmem)
+{
+ cmem->validation_bits = mem->validation_bits;
+ cmem->node = mem->node;
+ cmem->card = mem->card;
+ cmem->module = mem->module;
+ cmem->bank = mem->bank;
+ cmem->device = mem->device;
+ cmem->row = mem->row;
+ cmem->column = mem->column;
+ cmem->bit_pos = mem->bit_pos;
+ cmem->requestor_id = mem->requestor_id;
+ cmem->responder_id = mem->responder_id;
+ cmem->target_id = mem->target_id;
+ cmem->rank = mem->rank;
+ cmem->mem_array_handle = mem->mem_array_handle;
+ cmem->mem_dev_handle = mem->mem_dev_handle;
+}
+
+const char *cper_mem_err_unpack(struct trace_seq *p,
+ struct cper_mem_err_compact *cmem)
+{
+ const char *ret = trace_seq_buffer_ptr(p);
+
+ if (cper_mem_err_location(cmem, rcd_decode_str))
+ trace_seq_printf(p, "%s", rcd_decode_str);
+ if (cper_dimm_err_location(cmem, rcd_decode_str))
+ trace_seq_printf(p, "%s", rcd_decode_str);
+ trace_seq_putc(p, '\0');
+
+ return ret;
+}
+
+static void cper_print_mem(const char *pfx, const struct cper_sec_mem_err *mem,
+ int len)
+{
+ struct cper_mem_err_compact cmem;
+
+ /* Don't trust UEFI 2.1/2.2 structure with bad validation bits */
+ if (len == sizeof(struct cper_sec_mem_err_old) &&
+ (mem->validation_bits & ~(CPER_MEM_VALID_RANK_NUMBER - 1))) {
+ pr_err(FW_WARN "valid bits set for fields beyond structure\n");
+ return;
+ }
+ 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_PA)
+ printk("%s""physical_address: 0x%016llx\n",
+ pfx, mem->physical_addr);
+ if (mem->validation_bits & CPER_MEM_VALID_PA_MASK)
+ printk("%s""physical_address_mask: 0x%016llx\n",
+ pfx, mem->physical_addr_mask);
+ cper_mem_err_pack(mem, &cmem);
+ if (cper_mem_err_location(&cmem, rcd_decode_str))
+ printk("%s%s\n", pfx, rcd_decode_str);
+ if (mem->validation_bits & CPER_MEM_VALID_ERROR_TYPE) {
+ u8 etype = mem->error_type;
+ printk("%s""error_type: %d, %s\n", pfx, etype,
+ cper_mem_err_type_str(etype));
+ }
+ if (cper_dimm_err_location(&cmem, rcd_decode_str))
+ printk("%s%s\n", pfx, rcd_decode_str);
+}
+
+static const char * const pcie_port_type_strs[] = {
+ "PCIe end point",
+ "legacy PCI end point",
+ "unknown",
+ "unknown",
+ "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)
+{
+ 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(pcie_port_type_strs) ?
+ 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,
+ pcie->device_id.secondary_bus);
+ 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)
+ printk(
+ "%s""bridge: secondary_status: 0x%04x, control: 0x%04x\n",
+ pfx, pcie->bridge.secondary_status, pcie->bridge.control);
+}
+
+static void cper_print_tstamp(const char *pfx,
+ struct acpi_hest_generic_data_v300 *gdata)
+{
+ __u8 hour, min, sec, day, mon, year, century, *timestamp;
+
+ if (gdata->validation_bits & ACPI_HEST_GEN_VALID_TIMESTAMP) {
+ timestamp = (__u8 *)&(gdata->time_stamp);
+ sec = bcd2bin(timestamp[0]);
+ min = bcd2bin(timestamp[1]);
+ hour = bcd2bin(timestamp[2]);
+ day = bcd2bin(timestamp[4]);
+ mon = bcd2bin(timestamp[5]);
+ year = bcd2bin(timestamp[6]);
+ century = bcd2bin(timestamp[7]);
+
+ printk("%s%ststamp: %02d%02d-%02d-%02d %02d:%02d:%02d\n", pfx,
+ (timestamp[3] & 0x1 ? "precise " : "imprecise "),
+ century, year, mon, day, hour, min, sec);
+ }
+}
+
+static void
+cper_estatus_print_section(const char *pfx, struct acpi_hest_generic_data *gdata,
+ int sec_no)
+{
+ guid_t *sec_type = (guid_t *)gdata->section_type;
+ __u16 severity;
+ char newpfx[64];
+
+ if (acpi_hest_get_version(gdata) >= 3)
+ cper_print_tstamp(pfx, (struct acpi_hest_generic_data_v300 *)gdata);
+
+ severity = gdata->error_severity;
+ printk("%s""Error %d, type: %s\n", pfx, sec_no,
+ cper_severity_str(severity));
+ if (gdata->validation_bits & CPER_SEC_VALID_FRU_ID)
+ printk("%s""fru_id: %pUl\n", pfx, gdata->fru_id);
+ if (gdata->validation_bits & CPER_SEC_VALID_FRU_TEXT)
+ printk("%s""fru_text: %.20s\n", pfx, gdata->fru_text);
+
+ snprintf(newpfx, sizeof(newpfx), "%s ", pfx);
+ if (guid_equal(sec_type, &CPER_SEC_PROC_GENERIC)) {
+ struct cper_sec_proc_generic *proc_err = acpi_hest_get_payload(gdata);
+
+ printk("%s""section_type: general processor error\n", newpfx);
+ if (gdata->error_data_length >= sizeof(*proc_err))
+ cper_print_proc_generic(newpfx, proc_err);
+ else
+ goto err_section_too_small;
+ } else if (guid_equal(sec_type, &CPER_SEC_PLATFORM_MEM)) {
+ struct cper_sec_mem_err *mem_err = acpi_hest_get_payload(gdata);
+
+ printk("%s""section_type: memory error\n", newpfx);
+ if (gdata->error_data_length >=
+ sizeof(struct cper_sec_mem_err_old))
+ cper_print_mem(newpfx, mem_err,
+ gdata->error_data_length);
+ else
+ goto err_section_too_small;
+ } else if (guid_equal(sec_type, &CPER_SEC_PCIE)) {
+ struct cper_sec_pcie *pcie = acpi_hest_get_payload(gdata);
+
+ printk("%s""section_type: PCIe error\n", newpfx);
+ if (gdata->error_data_length >= sizeof(*pcie))
+ cper_print_pcie(newpfx, pcie, gdata);
+ else
+ goto err_section_too_small;
+#if defined(CONFIG_ARM64) || defined(CONFIG_ARM)
+ } else if (guid_equal(sec_type, &CPER_SEC_PROC_ARM)) {
+ struct cper_sec_proc_arm *arm_err = acpi_hest_get_payload(gdata);
+
+ printk("%ssection_type: ARM processor error\n", newpfx);
+ if (gdata->error_data_length >= sizeof(*arm_err))
+ cper_print_proc_arm(newpfx, arm_err);
+ else
+ goto err_section_too_small;
+#endif
+#if defined(CONFIG_UEFI_CPER_X86)
+ } else if (guid_equal(sec_type, &CPER_SEC_PROC_IA)) {
+ struct cper_sec_proc_ia *ia_err = acpi_hest_get_payload(gdata);
+
+ printk("%ssection_type: IA32/X64 processor error\n", newpfx);
+ if (gdata->error_data_length >= sizeof(*ia_err))
+ cper_print_proc_ia(newpfx, ia_err);
+ else
+ goto err_section_too_small;
+#endif
+ } else {
+ const void *err = acpi_hest_get_payload(gdata);
+
+ printk("%ssection type: unknown, %pUl\n", newpfx, sec_type);
+ printk("%ssection length: %#x\n", newpfx,
+ gdata->error_data_length);
+ print_hex_dump(newpfx, "", DUMP_PREFIX_OFFSET, 16, 4, err,
+ gdata->error_data_length, true);
+ }
+
+ return;
+
+err_section_too_small:
+ pr_err(FW_WARN "error section length is too small\n");
+}
+
+void cper_estatus_print(const char *pfx,
+ const struct acpi_hest_generic_status *estatus)
+{
+ struct acpi_hest_generic_data *gdata;
+ int sec_no = 0;
+ char newpfx[64];
+ __u16 severity;
+
+ severity = estatus->error_severity;
+ if (severity == CPER_SEV_CORRECTED)
+ printk("%s%s\n", pfx,
+ "It has been corrected by h/w "
+ "and requires no further action");
+ printk("%s""event severity: %s\n", pfx, cper_severity_str(severity));
+ snprintf(newpfx, sizeof(newpfx), "%s ", pfx);
+
+ apei_estatus_for_each_section(estatus, gdata) {
+ cper_estatus_print_section(newpfx, gdata, sec_no);
+ sec_no++;
+ }
+}
+EXPORT_SYMBOL_GPL(cper_estatus_print);
+
+int cper_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;
+}
+EXPORT_SYMBOL_GPL(cper_estatus_check_header);
+
+int cper_estatus_check(const struct acpi_hest_generic_status *estatus)
+{
+ struct acpi_hest_generic_data *gdata;
+ unsigned int data_len, gedata_len;
+ int rc;
+
+ rc = cper_estatus_check_header(estatus);
+ if (rc)
+ return rc;
+ data_len = estatus->data_length;
+
+ apei_estatus_for_each_section(estatus, gdata) {
+ gedata_len = acpi_hest_get_error_length(gdata);
+ if (gedata_len > data_len - acpi_hest_get_size(gdata))
+ return -EINVAL;
+ data_len -= acpi_hest_get_record_size(gdata);
+ }
+ if (data_len)
+ return -EINVAL;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(cper_estatus_check);