1// SPDX-License-Identifier: GPL-2.0 2/* 3 * UEFI Common Platform Error Record (CPER) support 4 * 5 * Copyright (C) 2010, Intel Corp. 6 * Author: Huang Ying <ying.huang@intel.com> 7 * 8 * CPER is the format used to describe platform hardware error by 9 * various tables, such as ERST, BERT and HEST etc. 10 * 11 * For more information about CPER, please refer to Appendix N of UEFI 12 * Specification version 2.4. 13 */ 14 15#include <linux/kernel.h> 16#include <linux/module.h> 17#include <linux/time.h> 18#include <linux/cper.h> 19#include <linux/dmi.h> 20#include <linux/acpi.h> 21#include <linux/pci.h> 22#include <linux/aer.h> 23#include <linux/printk.h> 24#include <linux/bcd.h> 25#include <acpi/ghes.h> 26#include <ras/ras_event.h> 27 28/* 29 * CPER record ID need to be unique even after reboot, because record 30 * ID is used as index for ERST storage, while CPER records from 31 * multiple boot may co-exist in ERST. 32 */ 33u64 cper_next_record_id(void) 34{ 35 static atomic64_t seq; 36 37 if (!atomic64_read(&seq)) { 38 time64_t time = ktime_get_real_seconds(); 39 40 /* 41 * This code is unlikely to still be needed in year 2106, 42 * but just in case, let's use a few more bits for timestamps 43 * after y2038 to be sure they keep increasing monotonically 44 * for the next few hundred years... 45 */ 46 if (time < 0x80000000) 47 atomic64_set(&seq, (ktime_get_real_seconds()) << 32); 48 else 49 atomic64_set(&seq, 0x8000000000000000ull | 50 ktime_get_real_seconds() << 24); 51 } 52 53 return atomic64_inc_return(&seq); 54} 55EXPORT_SYMBOL_GPL(cper_next_record_id); 56 57static const char * const severity_strs[] = { 58 "recoverable", 59 "fatal", 60 "corrected", 61 "info", 62}; 63 64const char *cper_severity_str(unsigned int severity) 65{ 66 return severity < ARRAY_SIZE(severity_strs) ? 67 severity_strs[severity] : "unknown"; 68} 69EXPORT_SYMBOL_GPL(cper_severity_str); 70 71/* 72 * cper_print_bits - print strings for set bits 73 * @pfx: prefix for each line, including log level and prefix string 74 * @bits: bit mask 75 * @strs: string array, indexed by bit position 76 * @strs_size: size of the string array: @strs 77 * 78 * For each set bit in @bits, print the corresponding string in @strs. 79 * If the output length is longer than 80, multiple line will be 80 * printed, with @pfx is printed at the beginning of each line. 81 */ 82void cper_print_bits(const char *pfx, unsigned int bits, 83 const char * const strs[], unsigned int strs_size) 84{ 85 int i, len = 0; 86 const char *str; 87 char buf[84]; 88 89 for (i = 0; i < strs_size; i++) { 90 if (!(bits & (1U << i))) 91 continue; 92 str = strs[i]; 93 if (!str) 94 continue; 95 if (len && len + strlen(str) + 2 > 80) { 96 printk("%s\n", buf); 97 len = 0; 98 } 99 if (!len) 100 len = snprintf(buf, sizeof(buf), "%s%s", pfx, str); 101 else 102 len += scnprintf(buf+len, sizeof(buf)-len, ", %s", str); 103 } 104 if (len) 105 printk("%s\n", buf); 106} 107 108static const char * const proc_type_strs[] = { 109 "IA32/X64", 110 "IA64", 111 "ARM", 112}; 113 114static const char * const proc_isa_strs[] = { 115 "IA32", 116 "IA64", 117 "X64", 118 "ARM A32/T32", 119 "ARM A64", 120}; 121 122const char * const cper_proc_error_type_strs[] = { 123 "cache error", 124 "TLB error", 125 "bus error", 126 "micro-architectural error", 127}; 128 129static const char * const proc_op_strs[] = { 130 "unknown or generic", 131 "data read", 132 "data write", 133 "instruction execution", 134}; 135 136static const char * const proc_flag_strs[] = { 137 "restartable", 138 "precise IP", 139 "overflow", 140 "corrected", 141}; 142 143static void cper_print_proc_generic(const char *pfx, 144 const struct cper_sec_proc_generic *proc) 145{ 146 if (proc->validation_bits & CPER_PROC_VALID_TYPE) 147 printk("%s""processor_type: %d, %s\n", pfx, proc->proc_type, 148 proc->proc_type < ARRAY_SIZE(proc_type_strs) ? 149 proc_type_strs[proc->proc_type] : "unknown"); 150 if (proc->validation_bits & CPER_PROC_VALID_ISA) 151 printk("%s""processor_isa: %d, %s\n", pfx, proc->proc_isa, 152 proc->proc_isa < ARRAY_SIZE(proc_isa_strs) ? 153 proc_isa_strs[proc->proc_isa] : "unknown"); 154 if (proc->validation_bits & CPER_PROC_VALID_ERROR_TYPE) { 155 printk("%s""error_type: 0x%02x\n", pfx, proc->proc_error_type); 156 cper_print_bits(pfx, proc->proc_error_type, 157 cper_proc_error_type_strs, 158 ARRAY_SIZE(cper_proc_error_type_strs)); 159 } 160 if (proc->validation_bits & CPER_PROC_VALID_OPERATION) 161 printk("%s""operation: %d, %s\n", pfx, proc->operation, 162 proc->operation < ARRAY_SIZE(proc_op_strs) ? 163 proc_op_strs[proc->operation] : "unknown"); 164 if (proc->validation_bits & CPER_PROC_VALID_FLAGS) { 165 printk("%s""flags: 0x%02x\n", pfx, proc->flags); 166 cper_print_bits(pfx, proc->flags, proc_flag_strs, 167 ARRAY_SIZE(proc_flag_strs)); 168 } 169 if (proc->validation_bits & CPER_PROC_VALID_LEVEL) 170 printk("%s""level: %d\n", pfx, proc->level); 171 if (proc->validation_bits & CPER_PROC_VALID_VERSION) 172 printk("%s""version_info: 0x%016llx\n", pfx, proc->cpu_version); 173 if (proc->validation_bits & CPER_PROC_VALID_ID) 174 printk("%s""processor_id: 0x%016llx\n", pfx, proc->proc_id); 175 if (proc->validation_bits & CPER_PROC_VALID_TARGET_ADDRESS) 176 printk("%s""target_address: 0x%016llx\n", 177 pfx, proc->target_addr); 178 if (proc->validation_bits & CPER_PROC_VALID_REQUESTOR_ID) 179 printk("%s""requestor_id: 0x%016llx\n", 180 pfx, proc->requestor_id); 181 if (proc->validation_bits & CPER_PROC_VALID_RESPONDER_ID) 182 printk("%s""responder_id: 0x%016llx\n", 183 pfx, proc->responder_id); 184 if (proc->validation_bits & CPER_PROC_VALID_IP) 185 printk("%s""IP: 0x%016llx\n", pfx, proc->ip); 186} 187 188static const char * const mem_err_type_strs[] = { 189 "unknown", 190 "no error", 191 "single-bit ECC", 192 "multi-bit ECC", 193 "single-symbol chipkill ECC", 194 "multi-symbol chipkill ECC", 195 "master abort", 196 "target abort", 197 "parity error", 198 "watchdog timeout", 199 "invalid address", 200 "mirror Broken", 201 "memory sparing", 202 "scrub corrected error", 203 "scrub uncorrected error", 204 "physical memory map-out event", 205}; 206 207const char *cper_mem_err_type_str(unsigned int etype) 208{ 209 return etype < ARRAY_SIZE(mem_err_type_strs) ? 210 mem_err_type_strs[etype] : "unknown"; 211} 212EXPORT_SYMBOL_GPL(cper_mem_err_type_str); 213 214static int cper_mem_err_location(struct cper_mem_err_compact *mem, char *msg) 215{ 216 u32 len, n; 217 218 if (!msg) 219 return 0; 220 221 n = 0; 222 len = CPER_REC_LEN - 1; 223 if (mem->validation_bits & CPER_MEM_VALID_NODE) 224 n += scnprintf(msg + n, len - n, "node: %d ", mem->node); 225 if (mem->validation_bits & CPER_MEM_VALID_CARD) 226 n += scnprintf(msg + n, len - n, "card: %d ", mem->card); 227 if (mem->validation_bits & CPER_MEM_VALID_MODULE) 228 n += scnprintf(msg + n, len - n, "module: %d ", mem->module); 229 if (mem->validation_bits & CPER_MEM_VALID_RANK_NUMBER) 230 n += scnprintf(msg + n, len - n, "rank: %d ", mem->rank); 231 if (mem->validation_bits & CPER_MEM_VALID_BANK) 232 n += scnprintf(msg + n, len - n, "bank: %d ", mem->bank); 233 if (mem->validation_bits & CPER_MEM_VALID_BANK_GROUP) 234 n += scnprintf(msg + n, len - n, "bank_group: %d ", 235 mem->bank >> CPER_MEM_BANK_GROUP_SHIFT); 236 if (mem->validation_bits & CPER_MEM_VALID_BANK_ADDRESS) 237 n += scnprintf(msg + n, len - n, "bank_address: %d ", 238 mem->bank & CPER_MEM_BANK_ADDRESS_MASK); 239 if (mem->validation_bits & CPER_MEM_VALID_DEVICE) 240 n += scnprintf(msg + n, len - n, "device: %d ", mem->device); 241 if (mem->validation_bits & (CPER_MEM_VALID_ROW | CPER_MEM_VALID_ROW_EXT)) { 242 u32 row = mem->row; 243 244 row |= cper_get_mem_extension(mem->validation_bits, mem->extended); 245 n += scnprintf(msg + n, len - n, "row: %d ", row); 246 } 247 if (mem->validation_bits & CPER_MEM_VALID_COLUMN) 248 n += scnprintf(msg + n, len - n, "column: %d ", mem->column); 249 if (mem->validation_bits & CPER_MEM_VALID_BIT_POSITION) 250 n += scnprintf(msg + n, len - n, "bit_position: %d ", 251 mem->bit_pos); 252 if (mem->validation_bits & CPER_MEM_VALID_REQUESTOR_ID) 253 n += scnprintf(msg + n, len - n, "requestor_id: 0x%016llx ", 254 mem->requestor_id); 255 if (mem->validation_bits & CPER_MEM_VALID_RESPONDER_ID) 256 n += scnprintf(msg + n, len - n, "responder_id: 0x%016llx ", 257 mem->responder_id); 258 if (mem->validation_bits & CPER_MEM_VALID_TARGET_ID) 259 scnprintf(msg + n, len - n, "target_id: 0x%016llx ", 260 mem->target_id); 261 if (mem->validation_bits & CPER_MEM_VALID_CHIP_ID) 262 scnprintf(msg + n, len - n, "chip_id: %d ", 263 mem->extended >> CPER_MEM_CHIP_ID_SHIFT); 264 265 msg[n] = '\0'; 266 return n; 267} 268 269static int cper_dimm_err_location(struct cper_mem_err_compact *mem, char *msg) 270{ 271 u32 len, n; 272 const char *bank = NULL, *device = NULL; 273 274 if (!msg || !(mem->validation_bits & CPER_MEM_VALID_MODULE_HANDLE)) 275 return 0; 276 277 len = CPER_REC_LEN; 278 dmi_memdev_name(mem->mem_dev_handle, &bank, &device); 279 if (bank && device) 280 n = snprintf(msg, len, "DIMM location: %s %s ", bank, device); 281 else 282 n = snprintf(msg, len, 283 "DIMM location: not present. DMI handle: 0x%.4x ", 284 mem->mem_dev_handle); 285 286 return n; 287} 288 289void cper_mem_err_pack(const struct cper_sec_mem_err *mem, 290 struct cper_mem_err_compact *cmem) 291{ 292 cmem->validation_bits = mem->validation_bits; 293 cmem->node = mem->node; 294 cmem->card = mem->card; 295 cmem->module = mem->module; 296 cmem->bank = mem->bank; 297 cmem->device = mem->device; 298 cmem->row = mem->row; 299 cmem->column = mem->column; 300 cmem->bit_pos = mem->bit_pos; 301 cmem->requestor_id = mem->requestor_id; 302 cmem->responder_id = mem->responder_id; 303 cmem->target_id = mem->target_id; 304 cmem->extended = mem->extended; 305 cmem->rank = mem->rank; 306 cmem->mem_array_handle = mem->mem_array_handle; 307 cmem->mem_dev_handle = mem->mem_dev_handle; 308} 309 310const char *cper_mem_err_unpack(struct trace_seq *p, 311 struct cper_mem_err_compact *cmem) 312{ 313 const char *ret = trace_seq_buffer_ptr(p); 314 char rcd_decode_str[CPER_REC_LEN]; 315 316 if (cper_mem_err_location(cmem, rcd_decode_str)) 317 trace_seq_printf(p, "%s", rcd_decode_str); 318 if (cper_dimm_err_location(cmem, rcd_decode_str)) 319 trace_seq_printf(p, "%s", rcd_decode_str); 320 trace_seq_putc(p, '\0'); 321 322 return ret; 323} 324 325static void cper_print_mem(const char *pfx, const struct cper_sec_mem_err *mem, 326 int len) 327{ 328 struct cper_mem_err_compact cmem; 329 char rcd_decode_str[CPER_REC_LEN]; 330 331 /* Don't trust UEFI 2.1/2.2 structure with bad validation bits */ 332 if (len == sizeof(struct cper_sec_mem_err_old) && 333 (mem->validation_bits & ~(CPER_MEM_VALID_RANK_NUMBER - 1))) { 334 pr_err(FW_WARN "valid bits set for fields beyond structure\n"); 335 return; 336 } 337 if (mem->validation_bits & CPER_MEM_VALID_ERROR_STATUS) 338 printk("%s""error_status: 0x%016llx\n", pfx, mem->error_status); 339 if (mem->validation_bits & CPER_MEM_VALID_PA) 340 printk("%s""physical_address: 0x%016llx\n", 341 pfx, mem->physical_addr); 342 if (mem->validation_bits & CPER_MEM_VALID_PA_MASK) 343 printk("%s""physical_address_mask: 0x%016llx\n", 344 pfx, mem->physical_addr_mask); 345 cper_mem_err_pack(mem, &cmem); 346 if (cper_mem_err_location(&cmem, rcd_decode_str)) 347 printk("%s%s\n", pfx, rcd_decode_str); 348 if (mem->validation_bits & CPER_MEM_VALID_ERROR_TYPE) { 349 u8 etype = mem->error_type; 350 printk("%s""error_type: %d, %s\n", pfx, etype, 351 cper_mem_err_type_str(etype)); 352 } 353 if (cper_dimm_err_location(&cmem, rcd_decode_str)) 354 printk("%s%s\n", pfx, rcd_decode_str); 355} 356 357static const char * const pcie_port_type_strs[] = { 358 "PCIe end point", 359 "legacy PCI end point", 360 "unknown", 361 "unknown", 362 "root port", 363 "upstream switch port", 364 "downstream switch port", 365 "PCIe to PCI/PCI-X bridge", 366 "PCI/PCI-X to PCIe bridge", 367 "root complex integrated endpoint device", 368 "root complex event collector", 369}; 370 371static void cper_print_pcie(const char *pfx, const struct cper_sec_pcie *pcie, 372 const struct acpi_hest_generic_data *gdata) 373{ 374 if (pcie->validation_bits & CPER_PCIE_VALID_PORT_TYPE) 375 printk("%s""port_type: %d, %s\n", pfx, pcie->port_type, 376 pcie->port_type < ARRAY_SIZE(pcie_port_type_strs) ? 377 pcie_port_type_strs[pcie->port_type] : "unknown"); 378 if (pcie->validation_bits & CPER_PCIE_VALID_VERSION) 379 printk("%s""version: %d.%d\n", pfx, 380 pcie->version.major, pcie->version.minor); 381 if (pcie->validation_bits & CPER_PCIE_VALID_COMMAND_STATUS) 382 printk("%s""command: 0x%04x, status: 0x%04x\n", pfx, 383 pcie->command, pcie->status); 384 if (pcie->validation_bits & CPER_PCIE_VALID_DEVICE_ID) { 385 const __u8 *p; 386 printk("%s""device_id: %04x:%02x:%02x.%x\n", pfx, 387 pcie->device_id.segment, pcie->device_id.bus, 388 pcie->device_id.device, pcie->device_id.function); 389 printk("%s""slot: %d\n", pfx, 390 pcie->device_id.slot >> CPER_PCIE_SLOT_SHIFT); 391 printk("%s""secondary_bus: 0x%02x\n", pfx, 392 pcie->device_id.secondary_bus); 393 printk("%s""vendor_id: 0x%04x, device_id: 0x%04x\n", pfx, 394 pcie->device_id.vendor_id, pcie->device_id.device_id); 395 p = pcie->device_id.class_code; 396 printk("%s""class_code: %02x%02x%02x\n", pfx, p[2], p[1], p[0]); 397 } 398 if (pcie->validation_bits & CPER_PCIE_VALID_SERIAL_NUMBER) 399 printk("%s""serial number: 0x%04x, 0x%04x\n", pfx, 400 pcie->serial_number.lower, pcie->serial_number.upper); 401 if (pcie->validation_bits & CPER_PCIE_VALID_BRIDGE_CONTROL_STATUS) 402 printk( 403 "%s""bridge: secondary_status: 0x%04x, control: 0x%04x\n", 404 pfx, pcie->bridge.secondary_status, pcie->bridge.control); 405 406 /* Fatal errors call __ghes_panic() before AER handler prints this */ 407 if ((pcie->validation_bits & CPER_PCIE_VALID_AER_INFO) && 408 (gdata->error_severity & CPER_SEV_FATAL)) { 409 struct aer_capability_regs *aer; 410 411 aer = (struct aer_capability_regs *)pcie->aer_info; 412 printk("%saer_uncor_status: 0x%08x, aer_uncor_mask: 0x%08x\n", 413 pfx, aer->uncor_status, aer->uncor_mask); 414 printk("%saer_uncor_severity: 0x%08x\n", 415 pfx, aer->uncor_severity); 416 printk("%sTLP Header: %08x %08x %08x %08x\n", pfx, 417 aer->header_log.dw0, aer->header_log.dw1, 418 aer->header_log.dw2, aer->header_log.dw3); 419 } 420} 421 422static const char * const fw_err_rec_type_strs[] = { 423 "IPF SAL Error Record", 424 "SOC Firmware Error Record Type1 (Legacy CrashLog Support)", 425 "SOC Firmware Error Record Type2", 426}; 427 428static void cper_print_fw_err(const char *pfx, 429 struct acpi_hest_generic_data *gdata, 430 const struct cper_sec_fw_err_rec_ref *fw_err) 431{ 432 void *buf = acpi_hest_get_payload(gdata); 433 u32 offset, length = gdata->error_data_length; 434 435 printk("%s""Firmware Error Record Type: %s\n", pfx, 436 fw_err->record_type < ARRAY_SIZE(fw_err_rec_type_strs) ? 437 fw_err_rec_type_strs[fw_err->record_type] : "unknown"); 438 printk("%s""Revision: %d\n", pfx, fw_err->revision); 439 440 /* Record Type based on UEFI 2.7 */ 441 if (fw_err->revision == 0) { 442 printk("%s""Record Identifier: %08llx\n", pfx, 443 fw_err->record_identifier); 444 } else if (fw_err->revision == 2) { 445 printk("%s""Record Identifier: %pUl\n", pfx, 446 &fw_err->record_identifier_guid); 447 } 448 449 /* 450 * The FW error record may contain trailing data beyond the 451 * structure defined by the specification. As the fields 452 * defined (and hence the offset of any trailing data) vary 453 * with the revision, set the offset to account for this 454 * variation. 455 */ 456 if (fw_err->revision == 0) { 457 /* record_identifier_guid not defined */ 458 offset = offsetof(struct cper_sec_fw_err_rec_ref, 459 record_identifier_guid); 460 } else if (fw_err->revision == 1) { 461 /* record_identifier not defined */ 462 offset = offsetof(struct cper_sec_fw_err_rec_ref, 463 record_identifier); 464 } else { 465 offset = sizeof(*fw_err); 466 } 467 468 buf += offset; 469 length -= offset; 470 471 print_hex_dump(pfx, "", DUMP_PREFIX_OFFSET, 16, 4, buf, length, true); 472} 473 474static void cper_print_tstamp(const char *pfx, 475 struct acpi_hest_generic_data_v300 *gdata) 476{ 477 __u8 hour, min, sec, day, mon, year, century, *timestamp; 478 479 if (gdata->validation_bits & ACPI_HEST_GEN_VALID_TIMESTAMP) { 480 timestamp = (__u8 *)&(gdata->time_stamp); 481 sec = bcd2bin(timestamp[0]); 482 min = bcd2bin(timestamp[1]); 483 hour = bcd2bin(timestamp[2]); 484 day = bcd2bin(timestamp[4]); 485 mon = bcd2bin(timestamp[5]); 486 year = bcd2bin(timestamp[6]); 487 century = bcd2bin(timestamp[7]); 488 489 printk("%s%ststamp: %02d%02d-%02d-%02d %02d:%02d:%02d\n", pfx, 490 (timestamp[3] & 0x1 ? "precise " : "imprecise "), 491 century, year, mon, day, hour, min, sec); 492 } 493} 494 495static void 496cper_estatus_print_section(const char *pfx, struct acpi_hest_generic_data *gdata, 497 int sec_no) 498{ 499 guid_t *sec_type = (guid_t *)gdata->section_type; 500 __u16 severity; 501 char newpfx[64]; 502 503 if (acpi_hest_get_version(gdata) >= 3) 504 cper_print_tstamp(pfx, (struct acpi_hest_generic_data_v300 *)gdata); 505 506 severity = gdata->error_severity; 507 printk("%s""Error %d, type: %s\n", pfx, sec_no, 508 cper_severity_str(severity)); 509 if (gdata->validation_bits & CPER_SEC_VALID_FRU_ID) 510 printk("%s""fru_id: %pUl\n", pfx, gdata->fru_id); 511 if (gdata->validation_bits & CPER_SEC_VALID_FRU_TEXT) 512 printk("%s""fru_text: %.20s\n", pfx, gdata->fru_text); 513 514 snprintf(newpfx, sizeof(newpfx), "%s ", pfx); 515 if (guid_equal(sec_type, &CPER_SEC_PROC_GENERIC)) { 516 struct cper_sec_proc_generic *proc_err = acpi_hest_get_payload(gdata); 517 518 printk("%s""section_type: general processor error\n", newpfx); 519 if (gdata->error_data_length >= sizeof(*proc_err)) 520 cper_print_proc_generic(newpfx, proc_err); 521 else 522 goto err_section_too_small; 523 } else if (guid_equal(sec_type, &CPER_SEC_PLATFORM_MEM)) { 524 struct cper_sec_mem_err *mem_err = acpi_hest_get_payload(gdata); 525 526 printk("%s""section_type: memory error\n", newpfx); 527 if (gdata->error_data_length >= 528 sizeof(struct cper_sec_mem_err_old)) 529 cper_print_mem(newpfx, mem_err, 530 gdata->error_data_length); 531 else 532 goto err_section_too_small; 533 } else if (guid_equal(sec_type, &CPER_SEC_PCIE)) { 534 struct cper_sec_pcie *pcie = acpi_hest_get_payload(gdata); 535 536 printk("%s""section_type: PCIe error\n", newpfx); 537 if (gdata->error_data_length >= sizeof(*pcie)) 538 cper_print_pcie(newpfx, pcie, gdata); 539 else 540 goto err_section_too_small; 541#if defined(CONFIG_ARM64) || defined(CONFIG_ARM) 542 } else if (guid_equal(sec_type, &CPER_SEC_PROC_ARM)) { 543 struct cper_sec_proc_arm *arm_err = acpi_hest_get_payload(gdata); 544 545 printk("%ssection_type: ARM processor error\n", newpfx); 546 if (gdata->error_data_length >= sizeof(*arm_err)) 547 cper_print_proc_arm(newpfx, arm_err); 548 else 549 goto err_section_too_small; 550#endif 551#if defined(CONFIG_UEFI_CPER_X86) 552 } else if (guid_equal(sec_type, &CPER_SEC_PROC_IA)) { 553 struct cper_sec_proc_ia *ia_err = acpi_hest_get_payload(gdata); 554 555 printk("%ssection_type: IA32/X64 processor error\n", newpfx); 556 if (gdata->error_data_length >= sizeof(*ia_err)) 557 cper_print_proc_ia(newpfx, ia_err); 558 else 559 goto err_section_too_small; 560#endif 561 } else if (guid_equal(sec_type, &CPER_SEC_FW_ERR_REC_REF)) { 562 struct cper_sec_fw_err_rec_ref *fw_err = acpi_hest_get_payload(gdata); 563 564 printk("%ssection_type: Firmware Error Record Reference\n", 565 newpfx); 566 /* The minimal FW Error Record contains 16 bytes */ 567 if (gdata->error_data_length >= SZ_16) 568 cper_print_fw_err(newpfx, gdata, fw_err); 569 else 570 goto err_section_too_small; 571 } else { 572 const void *err = acpi_hest_get_payload(gdata); 573 574 printk("%ssection type: unknown, %pUl\n", newpfx, sec_type); 575 printk("%ssection length: %#x\n", newpfx, 576 gdata->error_data_length); 577 print_hex_dump(newpfx, "", DUMP_PREFIX_OFFSET, 16, 4, err, 578 gdata->error_data_length, true); 579 } 580 581 return; 582 583err_section_too_small: 584 pr_err(FW_WARN "error section length is too small\n"); 585} 586 587void cper_estatus_print(const char *pfx, 588 const struct acpi_hest_generic_status *estatus) 589{ 590 struct acpi_hest_generic_data *gdata; 591 int sec_no = 0; 592 char newpfx[64]; 593 __u16 severity; 594 595 severity = estatus->error_severity; 596 if (severity == CPER_SEV_CORRECTED) 597 printk("%s%s\n", pfx, 598 "It has been corrected by h/w " 599 "and requires no further action"); 600 printk("%s""event severity: %s\n", pfx, cper_severity_str(severity)); 601 snprintf(newpfx, sizeof(newpfx), "%s ", pfx); 602 603 apei_estatus_for_each_section(estatus, gdata) { 604 cper_estatus_print_section(newpfx, gdata, sec_no); 605 sec_no++; 606 } 607} 608EXPORT_SYMBOL_GPL(cper_estatus_print); 609 610int cper_estatus_check_header(const struct acpi_hest_generic_status *estatus) 611{ 612 if (estatus->data_length && 613 estatus->data_length < sizeof(struct acpi_hest_generic_data)) 614 return -EINVAL; 615 if (estatus->raw_data_length && 616 estatus->raw_data_offset < sizeof(*estatus) + estatus->data_length) 617 return -EINVAL; 618 619 return 0; 620} 621EXPORT_SYMBOL_GPL(cper_estatus_check_header); 622 623int cper_estatus_check(const struct acpi_hest_generic_status *estatus) 624{ 625 struct acpi_hest_generic_data *gdata; 626 unsigned int data_len, record_size; 627 int rc; 628 629 rc = cper_estatus_check_header(estatus); 630 if (rc) 631 return rc; 632 633 data_len = estatus->data_length; 634 635 apei_estatus_for_each_section(estatus, gdata) { 636 if (sizeof(struct acpi_hest_generic_data) > data_len) 637 return -EINVAL; 638 639 record_size = acpi_hest_get_record_size(gdata); 640 if (record_size > data_len) 641 return -EINVAL; 642 643 data_len -= record_size; 644 } 645 if (data_len) 646 return -EINVAL; 647 648 return 0; 649} 650EXPORT_SYMBOL_GPL(cper_estatus_check); 651