140b0b3f8SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 2692f66f2SHari Bathini /* 3692f66f2SHari Bathini * crash.c - kernel crash support code. 4692f66f2SHari Bathini * Copyright (C) 2002-2004 Eric Biederman <ebiederm@xmission.com> 5692f66f2SHari Bathini */ 6692f66f2SHari Bathini 7692f66f2SHari Bathini #include <linux/crash_core.h> 8692f66f2SHari Bathini #include <linux/utsname.h> 9692f66f2SHari Bathini #include <linux/vmalloc.h> 10692f66f2SHari Bathini 11692f66f2SHari Bathini #include <asm/page.h> 12692f66f2SHari Bathini #include <asm/sections.h> 13692f66f2SHari Bathini 14a24d22b2SEric Biggers #include <crypto/sha1.h> 150935288cSVijay Balakrishna 16692f66f2SHari Bathini /* vmcoreinfo stuff */ 1723c85094SOmar Sandoval unsigned char *vmcoreinfo_data; 1823c85094SOmar Sandoval size_t vmcoreinfo_size; 19203e9e41SXunlei Pang u32 *vmcoreinfo_note; 20692f66f2SHari Bathini 211229384fSXunlei Pang /* trusted vmcoreinfo, e.g. we can make a copy in the crash memory */ 221229384fSXunlei Pang static unsigned char *vmcoreinfo_data_safecopy; 231229384fSXunlei Pang 24692f66f2SHari Bathini /* 25692f66f2SHari Bathini * parsing the "crashkernel" commandline 26692f66f2SHari Bathini * 27692f66f2SHari Bathini * this code is intended to be called from architecture specific code 28692f66f2SHari Bathini */ 29692f66f2SHari Bathini 30692f66f2SHari Bathini 31692f66f2SHari Bathini /* 32692f66f2SHari Bathini * This function parses command lines in the format 33692f66f2SHari Bathini * 34692f66f2SHari Bathini * crashkernel=ramsize-range:size[,...][@offset] 35692f66f2SHari Bathini * 36692f66f2SHari Bathini * The function returns 0 on success and -EINVAL on failure. 37692f66f2SHari Bathini */ 38692f66f2SHari Bathini static int __init parse_crashkernel_mem(char *cmdline, 39692f66f2SHari Bathini unsigned long long system_ram, 40692f66f2SHari Bathini unsigned long long *crash_size, 41692f66f2SHari Bathini unsigned long long *crash_base) 42692f66f2SHari Bathini { 43692f66f2SHari Bathini char *cur = cmdline, *tmp; 44692f66f2SHari Bathini 45692f66f2SHari Bathini /* for each entry of the comma-separated list */ 46692f66f2SHari Bathini do { 47692f66f2SHari Bathini unsigned long long start, end = ULLONG_MAX, size; 48692f66f2SHari Bathini 49692f66f2SHari Bathini /* get the start of the range */ 50692f66f2SHari Bathini start = memparse(cur, &tmp); 51692f66f2SHari Bathini if (cur == tmp) { 52692f66f2SHari Bathini pr_warn("crashkernel: Memory value expected\n"); 53692f66f2SHari Bathini return -EINVAL; 54692f66f2SHari Bathini } 55692f66f2SHari Bathini cur = tmp; 56692f66f2SHari Bathini if (*cur != '-') { 57692f66f2SHari Bathini pr_warn("crashkernel: '-' expected\n"); 58692f66f2SHari Bathini return -EINVAL; 59692f66f2SHari Bathini } 60692f66f2SHari Bathini cur++; 61692f66f2SHari Bathini 62692f66f2SHari Bathini /* if no ':' is here, than we read the end */ 63692f66f2SHari Bathini if (*cur != ':') { 64692f66f2SHari Bathini end = memparse(cur, &tmp); 65692f66f2SHari Bathini if (cur == tmp) { 66692f66f2SHari Bathini pr_warn("crashkernel: Memory value expected\n"); 67692f66f2SHari Bathini return -EINVAL; 68692f66f2SHari Bathini } 69692f66f2SHari Bathini cur = tmp; 70692f66f2SHari Bathini if (end <= start) { 71692f66f2SHari Bathini pr_warn("crashkernel: end <= start\n"); 72692f66f2SHari Bathini return -EINVAL; 73692f66f2SHari Bathini } 74692f66f2SHari Bathini } 75692f66f2SHari Bathini 76692f66f2SHari Bathini if (*cur != ':') { 77692f66f2SHari Bathini pr_warn("crashkernel: ':' expected\n"); 78692f66f2SHari Bathini return -EINVAL; 79692f66f2SHari Bathini } 80692f66f2SHari Bathini cur++; 81692f66f2SHari Bathini 82692f66f2SHari Bathini size = memparse(cur, &tmp); 83692f66f2SHari Bathini if (cur == tmp) { 84692f66f2SHari Bathini pr_warn("Memory value expected\n"); 85692f66f2SHari Bathini return -EINVAL; 86692f66f2SHari Bathini } 87692f66f2SHari Bathini cur = tmp; 88692f66f2SHari Bathini if (size >= system_ram) { 89692f66f2SHari Bathini pr_warn("crashkernel: invalid size\n"); 90692f66f2SHari Bathini return -EINVAL; 91692f66f2SHari Bathini } 92692f66f2SHari Bathini 93692f66f2SHari Bathini /* match ? */ 94692f66f2SHari Bathini if (system_ram >= start && system_ram < end) { 95692f66f2SHari Bathini *crash_size = size; 96692f66f2SHari Bathini break; 97692f66f2SHari Bathini } 98692f66f2SHari Bathini } while (*cur++ == ','); 99692f66f2SHari Bathini 100692f66f2SHari Bathini if (*crash_size > 0) { 101692f66f2SHari Bathini while (*cur && *cur != ' ' && *cur != '@') 102692f66f2SHari Bathini cur++; 103692f66f2SHari Bathini if (*cur == '@') { 104692f66f2SHari Bathini cur++; 105692f66f2SHari Bathini *crash_base = memparse(cur, &tmp); 106692f66f2SHari Bathini if (cur == tmp) { 107692f66f2SHari Bathini pr_warn("Memory value expected after '@'\n"); 108692f66f2SHari Bathini return -EINVAL; 109692f66f2SHari Bathini } 110692f66f2SHari Bathini } 111de40ccefSDave Young } else 112de40ccefSDave Young pr_info("crashkernel size resulted in zero bytes\n"); 113692f66f2SHari Bathini 114692f66f2SHari Bathini return 0; 115692f66f2SHari Bathini } 116692f66f2SHari Bathini 117692f66f2SHari Bathini /* 118692f66f2SHari Bathini * That function parses "simple" (old) crashkernel command lines like 119692f66f2SHari Bathini * 120692f66f2SHari Bathini * crashkernel=size[@offset] 121692f66f2SHari Bathini * 122692f66f2SHari Bathini * It returns 0 on success and -EINVAL on failure. 123692f66f2SHari Bathini */ 124692f66f2SHari Bathini static int __init parse_crashkernel_simple(char *cmdline, 125692f66f2SHari Bathini unsigned long long *crash_size, 126692f66f2SHari Bathini unsigned long long *crash_base) 127692f66f2SHari Bathini { 128692f66f2SHari Bathini char *cur = cmdline; 129692f66f2SHari Bathini 130692f66f2SHari Bathini *crash_size = memparse(cmdline, &cur); 131692f66f2SHari Bathini if (cmdline == cur) { 132692f66f2SHari Bathini pr_warn("crashkernel: memory value expected\n"); 133692f66f2SHari Bathini return -EINVAL; 134692f66f2SHari Bathini } 135692f66f2SHari Bathini 136692f66f2SHari Bathini if (*cur == '@') 137692f66f2SHari Bathini *crash_base = memparse(cur+1, &cur); 138692f66f2SHari Bathini else if (*cur != ' ' && *cur != '\0') { 139692f66f2SHari Bathini pr_warn("crashkernel: unrecognized char: %c\n", *cur); 140692f66f2SHari Bathini return -EINVAL; 141692f66f2SHari Bathini } 142692f66f2SHari Bathini 143692f66f2SHari Bathini return 0; 144692f66f2SHari Bathini } 145692f66f2SHari Bathini 146692f66f2SHari Bathini #define SUFFIX_HIGH 0 147692f66f2SHari Bathini #define SUFFIX_LOW 1 148692f66f2SHari Bathini #define SUFFIX_NULL 2 149692f66f2SHari Bathini static __initdata char *suffix_tbl[] = { 150692f66f2SHari Bathini [SUFFIX_HIGH] = ",high", 151692f66f2SHari Bathini [SUFFIX_LOW] = ",low", 152692f66f2SHari Bathini [SUFFIX_NULL] = NULL, 153692f66f2SHari Bathini }; 154692f66f2SHari Bathini 155692f66f2SHari Bathini /* 156692f66f2SHari Bathini * That function parses "suffix" crashkernel command lines like 157692f66f2SHari Bathini * 158692f66f2SHari Bathini * crashkernel=size,[high|low] 159692f66f2SHari Bathini * 160692f66f2SHari Bathini * It returns 0 on success and -EINVAL on failure. 161692f66f2SHari Bathini */ 162692f66f2SHari Bathini static int __init parse_crashkernel_suffix(char *cmdline, 163692f66f2SHari Bathini unsigned long long *crash_size, 164692f66f2SHari Bathini const char *suffix) 165692f66f2SHari Bathini { 166692f66f2SHari Bathini char *cur = cmdline; 167692f66f2SHari Bathini 168692f66f2SHari Bathini *crash_size = memparse(cmdline, &cur); 169692f66f2SHari Bathini if (cmdline == cur) { 170692f66f2SHari Bathini pr_warn("crashkernel: memory value expected\n"); 171692f66f2SHari Bathini return -EINVAL; 172692f66f2SHari Bathini } 173692f66f2SHari Bathini 174692f66f2SHari Bathini /* check with suffix */ 175692f66f2SHari Bathini if (strncmp(cur, suffix, strlen(suffix))) { 176692f66f2SHari Bathini pr_warn("crashkernel: unrecognized char: %c\n", *cur); 177692f66f2SHari Bathini return -EINVAL; 178692f66f2SHari Bathini } 179692f66f2SHari Bathini cur += strlen(suffix); 180692f66f2SHari Bathini if (*cur != ' ' && *cur != '\0') { 181692f66f2SHari Bathini pr_warn("crashkernel: unrecognized char: %c\n", *cur); 182692f66f2SHari Bathini return -EINVAL; 183692f66f2SHari Bathini } 184692f66f2SHari Bathini 185692f66f2SHari Bathini return 0; 186692f66f2SHari Bathini } 187692f66f2SHari Bathini 188692f66f2SHari Bathini static __init char *get_last_crashkernel(char *cmdline, 189692f66f2SHari Bathini const char *name, 190692f66f2SHari Bathini const char *suffix) 191692f66f2SHari Bathini { 192692f66f2SHari Bathini char *p = cmdline, *ck_cmdline = NULL; 193692f66f2SHari Bathini 194692f66f2SHari Bathini /* find crashkernel and use the last one if there are more */ 195692f66f2SHari Bathini p = strstr(p, name); 196692f66f2SHari Bathini while (p) { 197692f66f2SHari Bathini char *end_p = strchr(p, ' '); 198692f66f2SHari Bathini char *q; 199692f66f2SHari Bathini 200692f66f2SHari Bathini if (!end_p) 201692f66f2SHari Bathini end_p = p + strlen(p); 202692f66f2SHari Bathini 203692f66f2SHari Bathini if (!suffix) { 204692f66f2SHari Bathini int i; 205692f66f2SHari Bathini 206692f66f2SHari Bathini /* skip the one with any known suffix */ 207692f66f2SHari Bathini for (i = 0; suffix_tbl[i]; i++) { 208692f66f2SHari Bathini q = end_p - strlen(suffix_tbl[i]); 209692f66f2SHari Bathini if (!strncmp(q, suffix_tbl[i], 210692f66f2SHari Bathini strlen(suffix_tbl[i]))) 211692f66f2SHari Bathini goto next; 212692f66f2SHari Bathini } 213692f66f2SHari Bathini ck_cmdline = p; 214692f66f2SHari Bathini } else { 215692f66f2SHari Bathini q = end_p - strlen(suffix); 216692f66f2SHari Bathini if (!strncmp(q, suffix, strlen(suffix))) 217692f66f2SHari Bathini ck_cmdline = p; 218692f66f2SHari Bathini } 219692f66f2SHari Bathini next: 220692f66f2SHari Bathini p = strstr(p+1, name); 221692f66f2SHari Bathini } 222692f66f2SHari Bathini 223692f66f2SHari Bathini if (!ck_cmdline) 224692f66f2SHari Bathini return NULL; 225692f66f2SHari Bathini 226692f66f2SHari Bathini return ck_cmdline; 227692f66f2SHari Bathini } 228692f66f2SHari Bathini 229692f66f2SHari Bathini static int __init __parse_crashkernel(char *cmdline, 230692f66f2SHari Bathini unsigned long long system_ram, 231692f66f2SHari Bathini unsigned long long *crash_size, 232692f66f2SHari Bathini unsigned long long *crash_base, 233692f66f2SHari Bathini const char *name, 234692f66f2SHari Bathini const char *suffix) 235692f66f2SHari Bathini { 236692f66f2SHari Bathini char *first_colon, *first_space; 237692f66f2SHari Bathini char *ck_cmdline; 238692f66f2SHari Bathini 239692f66f2SHari Bathini BUG_ON(!crash_size || !crash_base); 240692f66f2SHari Bathini *crash_size = 0; 241692f66f2SHari Bathini *crash_base = 0; 242692f66f2SHari Bathini 243692f66f2SHari Bathini ck_cmdline = get_last_crashkernel(cmdline, name, suffix); 244692f66f2SHari Bathini 245692f66f2SHari Bathini if (!ck_cmdline) 246692f66f2SHari Bathini return -EINVAL; 247692f66f2SHari Bathini 248692f66f2SHari Bathini ck_cmdline += strlen(name); 249692f66f2SHari Bathini 250692f66f2SHari Bathini if (suffix) 251692f66f2SHari Bathini return parse_crashkernel_suffix(ck_cmdline, crash_size, 252692f66f2SHari Bathini suffix); 253692f66f2SHari Bathini /* 254692f66f2SHari Bathini * if the commandline contains a ':', then that's the extended 255692f66f2SHari Bathini * syntax -- if not, it must be the classic syntax 256692f66f2SHari Bathini */ 257692f66f2SHari Bathini first_colon = strchr(ck_cmdline, ':'); 258692f66f2SHari Bathini first_space = strchr(ck_cmdline, ' '); 259692f66f2SHari Bathini if (first_colon && (!first_space || first_colon < first_space)) 260692f66f2SHari Bathini return parse_crashkernel_mem(ck_cmdline, system_ram, 261692f66f2SHari Bathini crash_size, crash_base); 262692f66f2SHari Bathini 263692f66f2SHari Bathini return parse_crashkernel_simple(ck_cmdline, crash_size, crash_base); 264692f66f2SHari Bathini } 265692f66f2SHari Bathini 266692f66f2SHari Bathini /* 267692f66f2SHari Bathini * That function is the entry point for command line parsing and should be 268692f66f2SHari Bathini * called from the arch-specific code. 269692f66f2SHari Bathini */ 270692f66f2SHari Bathini int __init parse_crashkernel(char *cmdline, 271692f66f2SHari Bathini unsigned long long system_ram, 272692f66f2SHari Bathini unsigned long long *crash_size, 273692f66f2SHari Bathini unsigned long long *crash_base) 274692f66f2SHari Bathini { 275692f66f2SHari Bathini return __parse_crashkernel(cmdline, system_ram, crash_size, crash_base, 276692f66f2SHari Bathini "crashkernel=", NULL); 277692f66f2SHari Bathini } 278692f66f2SHari Bathini 279692f66f2SHari Bathini int __init parse_crashkernel_high(char *cmdline, 280692f66f2SHari Bathini unsigned long long system_ram, 281692f66f2SHari Bathini unsigned long long *crash_size, 282692f66f2SHari Bathini unsigned long long *crash_base) 283692f66f2SHari Bathini { 284692f66f2SHari Bathini return __parse_crashkernel(cmdline, system_ram, crash_size, crash_base, 285692f66f2SHari Bathini "crashkernel=", suffix_tbl[SUFFIX_HIGH]); 286692f66f2SHari Bathini } 287692f66f2SHari Bathini 288692f66f2SHari Bathini int __init parse_crashkernel_low(char *cmdline, 289692f66f2SHari Bathini unsigned long long system_ram, 290692f66f2SHari Bathini unsigned long long *crash_size, 291692f66f2SHari Bathini unsigned long long *crash_base) 292692f66f2SHari Bathini { 293692f66f2SHari Bathini return __parse_crashkernel(cmdline, system_ram, crash_size, crash_base, 294692f66f2SHari Bathini "crashkernel=", suffix_tbl[SUFFIX_LOW]); 295692f66f2SHari Bathini } 296692f66f2SHari Bathini 29751dbd925SHari Bathini Elf_Word *append_elf_note(Elf_Word *buf, char *name, unsigned int type, 298692f66f2SHari Bathini void *data, size_t data_len) 299692f66f2SHari Bathini { 30051dbd925SHari Bathini struct elf_note *note = (struct elf_note *)buf; 301692f66f2SHari Bathini 30251dbd925SHari Bathini note->n_namesz = strlen(name) + 1; 30351dbd925SHari Bathini note->n_descsz = data_len; 30451dbd925SHari Bathini note->n_type = type; 30551dbd925SHari Bathini buf += DIV_ROUND_UP(sizeof(*note), sizeof(Elf_Word)); 30651dbd925SHari Bathini memcpy(buf, name, note->n_namesz); 30751dbd925SHari Bathini buf += DIV_ROUND_UP(note->n_namesz, sizeof(Elf_Word)); 30851dbd925SHari Bathini memcpy(buf, data, data_len); 30951dbd925SHari Bathini buf += DIV_ROUND_UP(data_len, sizeof(Elf_Word)); 310692f66f2SHari Bathini 311692f66f2SHari Bathini return buf; 312692f66f2SHari Bathini } 313692f66f2SHari Bathini 31451dbd925SHari Bathini void final_note(Elf_Word *buf) 315692f66f2SHari Bathini { 31651dbd925SHari Bathini memset(buf, 0, sizeof(struct elf_note)); 317692f66f2SHari Bathini } 318692f66f2SHari Bathini 319692f66f2SHari Bathini static void update_vmcoreinfo_note(void) 320692f66f2SHari Bathini { 321692f66f2SHari Bathini u32 *buf = vmcoreinfo_note; 322692f66f2SHari Bathini 323692f66f2SHari Bathini if (!vmcoreinfo_size) 324692f66f2SHari Bathini return; 325692f66f2SHari Bathini buf = append_elf_note(buf, VMCOREINFO_NOTE_NAME, 0, vmcoreinfo_data, 326692f66f2SHari Bathini vmcoreinfo_size); 327692f66f2SHari Bathini final_note(buf); 328692f66f2SHari Bathini } 329692f66f2SHari Bathini 3301229384fSXunlei Pang void crash_update_vmcoreinfo_safecopy(void *ptr) 3311229384fSXunlei Pang { 3321229384fSXunlei Pang if (ptr) 3331229384fSXunlei Pang memcpy(ptr, vmcoreinfo_data, vmcoreinfo_size); 3341229384fSXunlei Pang 3351229384fSXunlei Pang vmcoreinfo_data_safecopy = ptr; 3361229384fSXunlei Pang } 3371229384fSXunlei Pang 338692f66f2SHari Bathini void crash_save_vmcoreinfo(void) 339692f66f2SHari Bathini { 340203e9e41SXunlei Pang if (!vmcoreinfo_note) 341203e9e41SXunlei Pang return; 342203e9e41SXunlei Pang 3431229384fSXunlei Pang /* Use the safe copy to generate vmcoreinfo note if have */ 3441229384fSXunlei Pang if (vmcoreinfo_data_safecopy) 3451229384fSXunlei Pang vmcoreinfo_data = vmcoreinfo_data_safecopy; 3461229384fSXunlei Pang 34791bc9aafSArnd Bergmann vmcoreinfo_append_str("CRASHTIME=%lld\n", ktime_get_real_seconds()); 348692f66f2SHari Bathini update_vmcoreinfo_note(); 349692f66f2SHari Bathini } 350692f66f2SHari Bathini 351692f66f2SHari Bathini void vmcoreinfo_append_str(const char *fmt, ...) 352692f66f2SHari Bathini { 353692f66f2SHari Bathini va_list args; 354692f66f2SHari Bathini char buf[0x50]; 355692f66f2SHari Bathini size_t r; 356692f66f2SHari Bathini 357692f66f2SHari Bathini va_start(args, fmt); 358692f66f2SHari Bathini r = vscnprintf(buf, sizeof(buf), fmt, args); 359692f66f2SHari Bathini va_end(args); 360692f66f2SHari Bathini 3615203f499SXunlei Pang r = min(r, (size_t)VMCOREINFO_BYTES - vmcoreinfo_size); 362692f66f2SHari Bathini 363692f66f2SHari Bathini memcpy(&vmcoreinfo_data[vmcoreinfo_size], buf, r); 364692f66f2SHari Bathini 365692f66f2SHari Bathini vmcoreinfo_size += r; 366692f66f2SHari Bathini } 367692f66f2SHari Bathini 368692f66f2SHari Bathini /* 369692f66f2SHari Bathini * provide an empty default implementation here -- architecture 370692f66f2SHari Bathini * code may override this 371692f66f2SHari Bathini */ 372692f66f2SHari Bathini void __weak arch_crash_save_vmcoreinfo(void) 373692f66f2SHari Bathini {} 374692f66f2SHari Bathini 375692f66f2SHari Bathini phys_addr_t __weak paddr_vmcoreinfo_note(void) 376692f66f2SHari Bathini { 377203e9e41SXunlei Pang return __pa(vmcoreinfo_note); 378692f66f2SHari Bathini } 37943d4cb47SMarc-André Lureau EXPORT_SYMBOL(paddr_vmcoreinfo_note); 380692f66f2SHari Bathini 3810935288cSVijay Balakrishna #define NOTES_SIZE (&__stop_notes - &__start_notes) 3820935288cSVijay Balakrishna #define BUILD_ID_MAX SHA1_DIGEST_SIZE 3830935288cSVijay Balakrishna #define NT_GNU_BUILD_ID 3 3840935288cSVijay Balakrishna 3850935288cSVijay Balakrishna struct elf_note_section { 3860935288cSVijay Balakrishna struct elf_note n_hdr; 3870935288cSVijay Balakrishna u8 n_data[]; 3880935288cSVijay Balakrishna }; 3890935288cSVijay Balakrishna 3900935288cSVijay Balakrishna /* 3910935288cSVijay Balakrishna * Add build ID from .notes section as generated by the GNU ld(1) 3920935288cSVijay Balakrishna * or LLVM lld(1) --build-id option. 3930935288cSVijay Balakrishna */ 3940935288cSVijay Balakrishna static void add_build_id_vmcoreinfo(void) 3950935288cSVijay Balakrishna { 3960935288cSVijay Balakrishna char build_id[BUILD_ID_MAX * 2 + 1]; 3970935288cSVijay Balakrishna int n_remain = NOTES_SIZE; 3980935288cSVijay Balakrishna 3990935288cSVijay Balakrishna while (n_remain >= sizeof(struct elf_note)) { 4000935288cSVijay Balakrishna const struct elf_note_section *note_sec = 4010935288cSVijay Balakrishna &__start_notes + NOTES_SIZE - n_remain; 4020935288cSVijay Balakrishna const u32 n_namesz = note_sec->n_hdr.n_namesz; 4030935288cSVijay Balakrishna 4040935288cSVijay Balakrishna if (note_sec->n_hdr.n_type == NT_GNU_BUILD_ID && 4050935288cSVijay Balakrishna n_namesz != 0 && 4060935288cSVijay Balakrishna !strcmp((char *)¬e_sec->n_data[0], "GNU")) { 4070935288cSVijay Balakrishna if (note_sec->n_hdr.n_descsz <= BUILD_ID_MAX) { 4080935288cSVijay Balakrishna const u32 n_descsz = note_sec->n_hdr.n_descsz; 4090935288cSVijay Balakrishna const u8 *s = ¬e_sec->n_data[n_namesz]; 4100935288cSVijay Balakrishna 4110935288cSVijay Balakrishna s = PTR_ALIGN(s, 4); 4120935288cSVijay Balakrishna bin2hex(build_id, s, n_descsz); 4130935288cSVijay Balakrishna build_id[2 * n_descsz] = '\0'; 4140935288cSVijay Balakrishna VMCOREINFO_BUILD_ID(build_id); 4150935288cSVijay Balakrishna return; 4160935288cSVijay Balakrishna } 4170935288cSVijay Balakrishna pr_warn("Build ID is too large to include in vmcoreinfo: %u > %u\n", 4180935288cSVijay Balakrishna note_sec->n_hdr.n_descsz, 4190935288cSVijay Balakrishna BUILD_ID_MAX); 4200935288cSVijay Balakrishna return; 4210935288cSVijay Balakrishna } 4220935288cSVijay Balakrishna n_remain -= sizeof(struct elf_note) + 4230935288cSVijay Balakrishna ALIGN(note_sec->n_hdr.n_namesz, 4) + 4240935288cSVijay Balakrishna ALIGN(note_sec->n_hdr.n_descsz, 4); 4250935288cSVijay Balakrishna } 4260935288cSVijay Balakrishna } 4270935288cSVijay Balakrishna 428692f66f2SHari Bathini static int __init crash_save_vmcoreinfo_init(void) 429692f66f2SHari Bathini { 430203e9e41SXunlei Pang vmcoreinfo_data = (unsigned char *)get_zeroed_page(GFP_KERNEL); 431203e9e41SXunlei Pang if (!vmcoreinfo_data) { 432203e9e41SXunlei Pang pr_warn("Memory allocation for vmcoreinfo_data failed\n"); 433203e9e41SXunlei Pang return -ENOMEM; 434203e9e41SXunlei Pang } 435203e9e41SXunlei Pang 436203e9e41SXunlei Pang vmcoreinfo_note = alloc_pages_exact(VMCOREINFO_NOTE_SIZE, 437203e9e41SXunlei Pang GFP_KERNEL | __GFP_ZERO); 438203e9e41SXunlei Pang if (!vmcoreinfo_note) { 439203e9e41SXunlei Pang free_page((unsigned long)vmcoreinfo_data); 440203e9e41SXunlei Pang vmcoreinfo_data = NULL; 441203e9e41SXunlei Pang pr_warn("Memory allocation for vmcoreinfo_note failed\n"); 442203e9e41SXunlei Pang return -ENOMEM; 443203e9e41SXunlei Pang } 444203e9e41SXunlei Pang 445692f66f2SHari Bathini VMCOREINFO_OSRELEASE(init_uts_ns.name.release); 4460935288cSVijay Balakrishna add_build_id_vmcoreinfo(); 447692f66f2SHari Bathini VMCOREINFO_PAGESIZE(PAGE_SIZE); 448692f66f2SHari Bathini 449692f66f2SHari Bathini VMCOREINFO_SYMBOL(init_uts_ns); 450ca4a9241SAlexander Egorenkov VMCOREINFO_OFFSET(uts_namespace, name); 451692f66f2SHari Bathini VMCOREINFO_SYMBOL(node_online_map); 452692f66f2SHari Bathini #ifdef CONFIG_MMU 453eff4345eSOmar Sandoval VMCOREINFO_SYMBOL_ARRAY(swapper_pg_dir); 454692f66f2SHari Bathini #endif 455692f66f2SHari Bathini VMCOREINFO_SYMBOL(_stext); 456692f66f2SHari Bathini VMCOREINFO_SYMBOL(vmap_area_list); 457692f66f2SHari Bathini 458*a9ee6cf5SMike Rapoport #ifndef CONFIG_NUMA 459692f66f2SHari Bathini VMCOREINFO_SYMBOL(mem_map); 460692f66f2SHari Bathini VMCOREINFO_SYMBOL(contig_page_data); 461692f66f2SHari Bathini #endif 462692f66f2SHari Bathini #ifdef CONFIG_SPARSEMEM 463a0b12803SKirill A. Shutemov VMCOREINFO_SYMBOL_ARRAY(mem_section); 464692f66f2SHari Bathini VMCOREINFO_LENGTH(mem_section, NR_SECTION_ROOTS); 465692f66f2SHari Bathini VMCOREINFO_STRUCT_SIZE(mem_section); 466692f66f2SHari Bathini VMCOREINFO_OFFSET(mem_section, section_mem_map); 4674f5aecdfSPingfan Liu VMCOREINFO_NUMBER(SECTION_SIZE_BITS); 4681d50e5d0SBhupesh Sharma VMCOREINFO_NUMBER(MAX_PHYSMEM_BITS); 469692f66f2SHari Bathini #endif 470692f66f2SHari Bathini VMCOREINFO_STRUCT_SIZE(page); 471692f66f2SHari Bathini VMCOREINFO_STRUCT_SIZE(pglist_data); 472692f66f2SHari Bathini VMCOREINFO_STRUCT_SIZE(zone); 473692f66f2SHari Bathini VMCOREINFO_STRUCT_SIZE(free_area); 474692f66f2SHari Bathini VMCOREINFO_STRUCT_SIZE(list_head); 475692f66f2SHari Bathini VMCOREINFO_SIZE(nodemask_t); 476692f66f2SHari Bathini VMCOREINFO_OFFSET(page, flags); 477692f66f2SHari Bathini VMCOREINFO_OFFSET(page, _refcount); 478692f66f2SHari Bathini VMCOREINFO_OFFSET(page, mapping); 479692f66f2SHari Bathini VMCOREINFO_OFFSET(page, lru); 480692f66f2SHari Bathini VMCOREINFO_OFFSET(page, _mapcount); 481692f66f2SHari Bathini VMCOREINFO_OFFSET(page, private); 482692f66f2SHari Bathini VMCOREINFO_OFFSET(page, compound_dtor); 483692f66f2SHari Bathini VMCOREINFO_OFFSET(page, compound_order); 484692f66f2SHari Bathini VMCOREINFO_OFFSET(page, compound_head); 485692f66f2SHari Bathini VMCOREINFO_OFFSET(pglist_data, node_zones); 486692f66f2SHari Bathini VMCOREINFO_OFFSET(pglist_data, nr_zones); 487692f66f2SHari Bathini #ifdef CONFIG_FLAT_NODE_MEM_MAP 488692f66f2SHari Bathini VMCOREINFO_OFFSET(pglist_data, node_mem_map); 489692f66f2SHari Bathini #endif 490692f66f2SHari Bathini VMCOREINFO_OFFSET(pglist_data, node_start_pfn); 491692f66f2SHari Bathini VMCOREINFO_OFFSET(pglist_data, node_spanned_pages); 492692f66f2SHari Bathini VMCOREINFO_OFFSET(pglist_data, node_id); 493692f66f2SHari Bathini VMCOREINFO_OFFSET(zone, free_area); 494692f66f2SHari Bathini VMCOREINFO_OFFSET(zone, vm_stat); 495692f66f2SHari Bathini VMCOREINFO_OFFSET(zone, spanned_pages); 496692f66f2SHari Bathini VMCOREINFO_OFFSET(free_area, free_list); 497692f66f2SHari Bathini VMCOREINFO_OFFSET(list_head, next); 498692f66f2SHari Bathini VMCOREINFO_OFFSET(list_head, prev); 499692f66f2SHari Bathini VMCOREINFO_OFFSET(vmap_area, va_start); 500692f66f2SHari Bathini VMCOREINFO_OFFSET(vmap_area, list); 501692f66f2SHari Bathini VMCOREINFO_LENGTH(zone.free_area, MAX_ORDER); 502692f66f2SHari Bathini log_buf_vmcoreinfo_setup(); 503692f66f2SHari Bathini VMCOREINFO_LENGTH(free_area.free_list, MIGRATE_TYPES); 504692f66f2SHari Bathini VMCOREINFO_NUMBER(NR_FREE_PAGES); 505692f66f2SHari Bathini VMCOREINFO_NUMBER(PG_lru); 506692f66f2SHari Bathini VMCOREINFO_NUMBER(PG_private); 507692f66f2SHari Bathini VMCOREINFO_NUMBER(PG_swapcache); 5081cbf29daSPetr Tesarik VMCOREINFO_NUMBER(PG_swapbacked); 509692f66f2SHari Bathini VMCOREINFO_NUMBER(PG_slab); 510692f66f2SHari Bathini #ifdef CONFIG_MEMORY_FAILURE 511692f66f2SHari Bathini VMCOREINFO_NUMBER(PG_hwpoison); 512692f66f2SHari Bathini #endif 513692f66f2SHari Bathini VMCOREINFO_NUMBER(PG_head_mask); 5146e292b9bSMatthew Wilcox #define PAGE_BUDDY_MAPCOUNT_VALUE (~PG_buddy) 515692f66f2SHari Bathini VMCOREINFO_NUMBER(PAGE_BUDDY_MAPCOUNT_VALUE); 516692f66f2SHari Bathini #ifdef CONFIG_HUGETLB_PAGE 517692f66f2SHari Bathini VMCOREINFO_NUMBER(HUGETLB_PAGE_DTOR); 518e04b742fSDavid Hildenbrand #define PAGE_OFFLINE_MAPCOUNT_VALUE (~PG_offline) 519e04b742fSDavid Hildenbrand VMCOREINFO_NUMBER(PAGE_OFFLINE_MAPCOUNT_VALUE); 520692f66f2SHari Bathini #endif 521692f66f2SHari Bathini 522692f66f2SHari Bathini arch_crash_save_vmcoreinfo(); 523692f66f2SHari Bathini update_vmcoreinfo_note(); 524692f66f2SHari Bathini 525692f66f2SHari Bathini return 0; 526692f66f2SHari Bathini } 527692f66f2SHari Bathini 528692f66f2SHari Bathini subsys_initcall(crash_save_vmcoreinfo_init); 529