1 // SPDX-License-Identifier: GPL-2.0-only 1 // SPDX-License-Identifier: GPL-2.0-only
2 /* 2 /*
3 * crash.c - kernel crash support code. 3 * crash.c - kernel crash support code.
4 * Copyright (C) 2002-2004 Eric Biederman <eb 4 * Copyright (C) 2002-2004 Eric Biederman <ebiederm@xmission.com>
5 */ 5 */
6 6
7 #include <linux/buildid.h> 7 #include <linux/buildid.h>
8 #include <linux/init.h> 8 #include <linux/init.h>
9 #include <linux/utsname.h> 9 #include <linux/utsname.h>
10 #include <linux/vmalloc.h> 10 #include <linux/vmalloc.h>
11 #include <linux/sizes.h> 11 #include <linux/sizes.h>
12 #include <linux/kexec.h> 12 #include <linux/kexec.h>
13 #include <linux/memory.h> 13 #include <linux/memory.h>
14 #include <linux/cpuhotplug.h> 14 #include <linux/cpuhotplug.h>
15 #include <linux/memblock.h> 15 #include <linux/memblock.h>
16 #include <linux/kmemleak.h> 16 #include <linux/kmemleak.h>
17 17
18 #include <asm/page.h> 18 #include <asm/page.h>
19 #include <asm/sections.h> 19 #include <asm/sections.h>
20 20
21 #include <crypto/sha1.h> 21 #include <crypto/sha1.h>
22 22
23 #include "kallsyms_internal.h" 23 #include "kallsyms_internal.h"
24 #include "kexec_internal.h" 24 #include "kexec_internal.h"
25 25
26 /* Location of the reserved area for the crash 26 /* Location of the reserved area for the crash kernel */
27 struct resource crashk_res = { 27 struct resource crashk_res = {
28 .name = "Crash kernel", 28 .name = "Crash kernel",
29 .start = 0, 29 .start = 0,
30 .end = 0, 30 .end = 0,
31 .flags = IORESOURCE_BUSY | IORESOURCE_ 31 .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM,
32 .desc = IORES_DESC_CRASH_KERNEL 32 .desc = IORES_DESC_CRASH_KERNEL
33 }; 33 };
34 struct resource crashk_low_res = { 34 struct resource crashk_low_res = {
35 .name = "Crash kernel", 35 .name = "Crash kernel",
36 .start = 0, 36 .start = 0,
37 .end = 0, 37 .end = 0,
38 .flags = IORESOURCE_BUSY | IORESOURCE_ 38 .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM,
39 .desc = IORES_DESC_CRASH_KERNEL 39 .desc = IORES_DESC_CRASH_KERNEL
40 }; 40 };
41 41
42 /* 42 /*
43 * parsing the "crashkernel" commandline 43 * parsing the "crashkernel" commandline
44 * 44 *
45 * this code is intended to be called from arc 45 * this code is intended to be called from architecture specific code
46 */ 46 */
47 47
48 48
49 /* 49 /*
50 * This function parses command lines in the f 50 * This function parses command lines in the format
51 * 51 *
52 * crashkernel=ramsize-range:size[,...][@off 52 * crashkernel=ramsize-range:size[,...][@offset]
53 * 53 *
54 * The function returns 0 on success and -EINV 54 * The function returns 0 on success and -EINVAL on failure.
55 */ 55 */
56 static int __init parse_crashkernel_mem(char * 56 static int __init parse_crashkernel_mem(char *cmdline,
57 unsign 57 unsigned long long system_ram,
58 unsign 58 unsigned long long *crash_size,
59 unsign 59 unsigned long long *crash_base)
60 { 60 {
61 char *cur = cmdline, *tmp; 61 char *cur = cmdline, *tmp;
62 unsigned long long total_mem = system_ 62 unsigned long long total_mem = system_ram;
63 63
64 /* 64 /*
65 * Firmware sometimes reserves some me 65 * Firmware sometimes reserves some memory regions for its own use,
66 * so the system memory size is less t 66 * so the system memory size is less than the actual physical memory
67 * size. Work around this by rounding 67 * size. Work around this by rounding up the total size to 128M,
68 * which is enough for most test cases 68 * which is enough for most test cases.
69 */ 69 */
70 total_mem = roundup(total_mem, SZ_128M 70 total_mem = roundup(total_mem, SZ_128M);
71 71
72 /* for each entry of the comma-separat 72 /* for each entry of the comma-separated list */
73 do { 73 do {
74 unsigned long long start, end 74 unsigned long long start, end = ULLONG_MAX, size;
75 75
76 /* get the start of the range 76 /* get the start of the range */
77 start = memparse(cur, &tmp); 77 start = memparse(cur, &tmp);
78 if (cur == tmp) { 78 if (cur == tmp) {
79 pr_warn("crashkernel: 79 pr_warn("crashkernel: Memory value expected\n");
80 return -EINVAL; 80 return -EINVAL;
81 } 81 }
82 cur = tmp; 82 cur = tmp;
83 if (*cur != '-') { 83 if (*cur != '-') {
84 pr_warn("crashkernel: 84 pr_warn("crashkernel: '-' expected\n");
85 return -EINVAL; 85 return -EINVAL;
86 } 86 }
87 cur++; 87 cur++;
88 88
89 /* if no ':' is here, than we 89 /* if no ':' is here, than we read the end */
90 if (*cur != ':') { 90 if (*cur != ':') {
91 end = memparse(cur, &t 91 end = memparse(cur, &tmp);
92 if (cur == tmp) { 92 if (cur == tmp) {
93 pr_warn("crash 93 pr_warn("crashkernel: Memory value expected\n");
94 return -EINVAL 94 return -EINVAL;
95 } 95 }
96 cur = tmp; 96 cur = tmp;
97 if (end <= start) { 97 if (end <= start) {
98 pr_warn("crash 98 pr_warn("crashkernel: end <= start\n");
99 return -EINVAL 99 return -EINVAL;
100 } 100 }
101 } 101 }
102 102
103 if (*cur != ':') { 103 if (*cur != ':') {
104 pr_warn("crashkernel: 104 pr_warn("crashkernel: ':' expected\n");
105 return -EINVAL; 105 return -EINVAL;
106 } 106 }
107 cur++; 107 cur++;
108 108
109 size = memparse(cur, &tmp); 109 size = memparse(cur, &tmp);
110 if (cur == tmp) { 110 if (cur == tmp) {
111 pr_warn("crashkernel: 111 pr_warn("crashkernel: Memory value expected\n");
112 return -EINVAL; 112 return -EINVAL;
113 } 113 }
114 cur = tmp; 114 cur = tmp;
115 if (size >= total_mem) { 115 if (size >= total_mem) {
116 pr_warn("crashkernel: 116 pr_warn("crashkernel: invalid size\n");
117 return -EINVAL; 117 return -EINVAL;
118 } 118 }
119 119
120 /* match ? */ 120 /* match ? */
121 if (total_mem >= start && tota 121 if (total_mem >= start && total_mem < end) {
122 *crash_size = size; 122 *crash_size = size;
123 break; 123 break;
124 } 124 }
125 } while (*cur++ == ','); 125 } while (*cur++ == ',');
126 126
127 if (*crash_size > 0) { 127 if (*crash_size > 0) {
128 while (*cur && *cur != ' ' && 128 while (*cur && *cur != ' ' && *cur != '@')
129 cur++; 129 cur++;
130 if (*cur == '@') { 130 if (*cur == '@') {
131 cur++; 131 cur++;
132 *crash_base = memparse 132 *crash_base = memparse(cur, &tmp);
133 if (cur == tmp) { 133 if (cur == tmp) {
134 pr_warn("crahs 134 pr_warn("crahskernel: Memory value expected after '@'\n");
135 return -EINVAL 135 return -EINVAL;
136 } 136 }
137 } 137 }
138 } else 138 } else
139 pr_info("crashkernel size resu 139 pr_info("crashkernel size resulted in zero bytes\n");
140 140
141 return 0; 141 return 0;
142 } 142 }
143 143
144 /* 144 /*
145 * That function parses "simple" (old) crashke 145 * That function parses "simple" (old) crashkernel command lines like
146 * 146 *
147 * crashkernel=size[@offset] 147 * crashkernel=size[@offset]
148 * 148 *
149 * It returns 0 on success and -EINVAL on fail 149 * It returns 0 on success and -EINVAL on failure.
150 */ 150 */
151 static int __init parse_crashkernel_simple(cha 151 static int __init parse_crashkernel_simple(char *cmdline,
152 uns 152 unsigned long long *crash_size,
153 uns 153 unsigned long long *crash_base)
154 { 154 {
155 char *cur = cmdline; 155 char *cur = cmdline;
156 156
157 *crash_size = memparse(cmdline, &cur); 157 *crash_size = memparse(cmdline, &cur);
158 if (cmdline == cur) { 158 if (cmdline == cur) {
159 pr_warn("crashkernel: memory v 159 pr_warn("crashkernel: memory value expected\n");
160 return -EINVAL; 160 return -EINVAL;
161 } 161 }
162 162
163 if (*cur == '@') 163 if (*cur == '@')
164 *crash_base = memparse(cur+1, 164 *crash_base = memparse(cur+1, &cur);
165 else if (*cur != ' ' && *cur != '\0') 165 else if (*cur != ' ' && *cur != '\0') {
166 pr_warn("crashkernel: unrecogn 166 pr_warn("crashkernel: unrecognized char: %c\n", *cur);
167 return -EINVAL; 167 return -EINVAL;
168 } 168 }
169 169
170 return 0; 170 return 0;
171 } 171 }
172 172
173 #define SUFFIX_HIGH 0 173 #define SUFFIX_HIGH 0
174 #define SUFFIX_LOW 1 174 #define SUFFIX_LOW 1
175 #define SUFFIX_NULL 2 175 #define SUFFIX_NULL 2
176 static __initdata char *suffix_tbl[] = { 176 static __initdata char *suffix_tbl[] = {
177 [SUFFIX_HIGH] = ",high", 177 [SUFFIX_HIGH] = ",high",
178 [SUFFIX_LOW] = ",low", 178 [SUFFIX_LOW] = ",low",
179 [SUFFIX_NULL] = NULL, 179 [SUFFIX_NULL] = NULL,
180 }; 180 };
181 181
182 /* 182 /*
183 * That function parses "suffix" crashkernel 183 * That function parses "suffix" crashkernel command lines like
184 * 184 *
185 * crashkernel=size,[high|low] 185 * crashkernel=size,[high|low]
186 * 186 *
187 * It returns 0 on success and -EINVAL on fail 187 * It returns 0 on success and -EINVAL on failure.
188 */ 188 */
189 static int __init parse_crashkernel_suffix(cha 189 static int __init parse_crashkernel_suffix(char *cmdline,
190 uns 190 unsigned long long *crash_size,
191 con 191 const char *suffix)
192 { 192 {
193 char *cur = cmdline; 193 char *cur = cmdline;
194 194
195 *crash_size = memparse(cmdline, &cur); 195 *crash_size = memparse(cmdline, &cur);
196 if (cmdline == cur) { 196 if (cmdline == cur) {
197 pr_warn("crashkernel: memory v 197 pr_warn("crashkernel: memory value expected\n");
198 return -EINVAL; 198 return -EINVAL;
199 } 199 }
200 200
201 /* check with suffix */ 201 /* check with suffix */
202 if (strncmp(cur, suffix, strlen(suffix 202 if (strncmp(cur, suffix, strlen(suffix))) {
203 pr_warn("crashkernel: unrecogn 203 pr_warn("crashkernel: unrecognized char: %c\n", *cur);
204 return -EINVAL; 204 return -EINVAL;
205 } 205 }
206 cur += strlen(suffix); 206 cur += strlen(suffix);
207 if (*cur != ' ' && *cur != '\0') { 207 if (*cur != ' ' && *cur != '\0') {
208 pr_warn("crashkernel: unrecogn 208 pr_warn("crashkernel: unrecognized char: %c\n", *cur);
209 return -EINVAL; 209 return -EINVAL;
210 } 210 }
211 211
212 return 0; 212 return 0;
213 } 213 }
214 214
215 static __init char *get_last_crashkernel(char 215 static __init char *get_last_crashkernel(char *cmdline,
216 const char *name, 216 const char *name,
217 const char *suffi 217 const char *suffix)
218 { 218 {
219 char *p = cmdline, *ck_cmdline = NULL; 219 char *p = cmdline, *ck_cmdline = NULL;
220 220
221 /* find crashkernel and use the last o 221 /* find crashkernel and use the last one if there are more */
222 p = strstr(p, name); 222 p = strstr(p, name);
223 while (p) { 223 while (p) {
224 char *end_p = strchr(p, ' '); 224 char *end_p = strchr(p, ' ');
225 char *q; 225 char *q;
226 226
227 if (!end_p) 227 if (!end_p)
228 end_p = p + strlen(p); 228 end_p = p + strlen(p);
229 229
230 if (!suffix) { 230 if (!suffix) {
231 int i; 231 int i;
232 232
233 /* skip the one with a 233 /* skip the one with any known suffix */
234 for (i = 0; suffix_tbl 234 for (i = 0; suffix_tbl[i]; i++) {
235 q = end_p - st 235 q = end_p - strlen(suffix_tbl[i]);
236 if (!strncmp(q 236 if (!strncmp(q, suffix_tbl[i],
237 s 237 strlen(suffix_tbl[i])))
238 goto n 238 goto next;
239 } 239 }
240 ck_cmdline = p; 240 ck_cmdline = p;
241 } else { 241 } else {
242 q = end_p - strlen(suf 242 q = end_p - strlen(suffix);
243 if (!strncmp(q, suffix 243 if (!strncmp(q, suffix, strlen(suffix)))
244 ck_cmdline = p 244 ck_cmdline = p;
245 } 245 }
246 next: 246 next:
247 p = strstr(p+1, name); 247 p = strstr(p+1, name);
248 } 248 }
249 249
250 return ck_cmdline; 250 return ck_cmdline;
251 } 251 }
252 252
253 static int __init __parse_crashkernel(char *cm 253 static int __init __parse_crashkernel(char *cmdline,
254 unsigned long lon 254 unsigned long long system_ram,
255 unsigned long lon 255 unsigned long long *crash_size,
256 unsigned long lon 256 unsigned long long *crash_base,
257 const char *suffi 257 const char *suffix)
258 { 258 {
259 char *first_colon, *first_space; 259 char *first_colon, *first_space;
260 char *ck_cmdline; 260 char *ck_cmdline;
261 char *name = "crashkernel="; 261 char *name = "crashkernel=";
262 262
263 BUG_ON(!crash_size || !crash_base); 263 BUG_ON(!crash_size || !crash_base);
264 *crash_size = 0; 264 *crash_size = 0;
265 *crash_base = 0; 265 *crash_base = 0;
266 266
267 ck_cmdline = get_last_crashkernel(cmdl 267 ck_cmdline = get_last_crashkernel(cmdline, name, suffix);
268 if (!ck_cmdline) 268 if (!ck_cmdline)
269 return -ENOENT; 269 return -ENOENT;
270 270
271 ck_cmdline += strlen(name); 271 ck_cmdline += strlen(name);
272 272
273 if (suffix) 273 if (suffix)
274 return parse_crashkernel_suffi 274 return parse_crashkernel_suffix(ck_cmdline, crash_size,
275 suffix); 275 suffix);
276 /* 276 /*
277 * if the commandline contains a ':', 277 * if the commandline contains a ':', then that's the extended
278 * syntax -- if not, it must be the cl 278 * syntax -- if not, it must be the classic syntax
279 */ 279 */
280 first_colon = strchr(ck_cmdline, ':'); 280 first_colon = strchr(ck_cmdline, ':');
281 first_space = strchr(ck_cmdline, ' '); 281 first_space = strchr(ck_cmdline, ' ');
282 if (first_colon && (!first_space || fi 282 if (first_colon && (!first_space || first_colon < first_space))
283 return parse_crashkernel_mem(c 283 return parse_crashkernel_mem(ck_cmdline, system_ram,
284 crash_size, cr 284 crash_size, crash_base);
285 285
286 return parse_crashkernel_simple(ck_cmd 286 return parse_crashkernel_simple(ck_cmdline, crash_size, crash_base);
287 } 287 }
288 288
289 /* 289 /*
290 * That function is the entry point for comman 290 * That function is the entry point for command line parsing and should be
291 * called from the arch-specific code. 291 * called from the arch-specific code.
292 * 292 *
293 * If crashkernel=,high|low is supported on ar 293 * If crashkernel=,high|low is supported on architecture, non-NULL values
294 * should be passed to parameters 'low_size' a 294 * should be passed to parameters 'low_size' and 'high'.
295 */ 295 */
296 int __init parse_crashkernel(char *cmdline, 296 int __init parse_crashkernel(char *cmdline,
297 unsigned long lon 297 unsigned long long system_ram,
298 unsigned long lon 298 unsigned long long *crash_size,
299 unsigned long lon 299 unsigned long long *crash_base,
300 unsigned long lon 300 unsigned long long *low_size,
301 bool *high) 301 bool *high)
302 { 302 {
303 int ret; 303 int ret;
304 304
305 /* crashkernel=X[@offset] */ 305 /* crashkernel=X[@offset] */
306 ret = __parse_crashkernel(cmdline, sys 306 ret = __parse_crashkernel(cmdline, system_ram, crash_size,
307 crash_base, NU 307 crash_base, NULL);
308 #ifdef CONFIG_ARCH_HAS_GENERIC_CRASHKERNEL_RES 308 #ifdef CONFIG_ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATION
309 /* 309 /*
310 * If non-NULL 'high' passed in and no 310 * If non-NULL 'high' passed in and no normal crashkernel
311 * setting detected, try parsing crash 311 * setting detected, try parsing crashkernel=,high|low.
312 */ 312 */
313 if (high && ret == -ENOENT) { 313 if (high && ret == -ENOENT) {
314 ret = __parse_crashkernel(cmdl 314 ret = __parse_crashkernel(cmdline, 0, crash_size,
315 crash_base, su 315 crash_base, suffix_tbl[SUFFIX_HIGH]);
316 if (ret || !*crash_size) 316 if (ret || !*crash_size)
317 return -EINVAL; 317 return -EINVAL;
318 318
319 /* 319 /*
320 * crashkernel=Y,low can be sp 320 * crashkernel=Y,low can be specified or not, but invalid value
321 * is not allowed. 321 * is not allowed.
322 */ 322 */
323 ret = __parse_crashkernel(cmdl 323 ret = __parse_crashkernel(cmdline, 0, low_size,
324 crash_base, su 324 crash_base, suffix_tbl[SUFFIX_LOW]);
325 if (ret == -ENOENT) { 325 if (ret == -ENOENT) {
326 *low_size = DEFAULT_CR 326 *low_size = DEFAULT_CRASH_KERNEL_LOW_SIZE;
327 ret = 0; 327 ret = 0;
328 } else if (ret) { 328 } else if (ret) {
329 return ret; 329 return ret;
330 } 330 }
331 331
332 *high = true; 332 *high = true;
333 } 333 }
334 #endif 334 #endif
335 if (!*crash_size) 335 if (!*crash_size)
336 ret = -EINVAL; 336 ret = -EINVAL;
337 337
338 if (*crash_size >= system_ram) 338 if (*crash_size >= system_ram)
339 ret = -EINVAL; 339 ret = -EINVAL;
340 340
341 return ret; 341 return ret;
342 } 342 }
343 343
344 /* 344 /*
345 * Add a dummy early_param handler to mark cra 345 * Add a dummy early_param handler to mark crashkernel= as a known command line
346 * parameter and suppress incorrect warnings i 346 * parameter and suppress incorrect warnings in init/main.c.
347 */ 347 */
348 static int __init parse_crashkernel_dummy(char 348 static int __init parse_crashkernel_dummy(char *arg)
349 { 349 {
350 return 0; 350 return 0;
351 } 351 }
352 early_param("crashkernel", parse_crashkernel_d 352 early_param("crashkernel", parse_crashkernel_dummy);
353 353
354 #ifdef CONFIG_ARCH_HAS_GENERIC_CRASHKERNEL_RES 354 #ifdef CONFIG_ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATION
355 static int __init reserve_crashkernel_low(unsi 355 static int __init reserve_crashkernel_low(unsigned long long low_size)
356 { 356 {
357 #ifdef CONFIG_64BIT 357 #ifdef CONFIG_64BIT
358 unsigned long long low_base; 358 unsigned long long low_base;
359 359
360 low_base = memblock_phys_alloc_range(l 360 low_base = memblock_phys_alloc_range(low_size, CRASH_ALIGN, 0, CRASH_ADDR_LOW_MAX);
361 if (!low_base) { 361 if (!low_base) {
362 pr_err("cannot allocate crashk 362 pr_err("cannot allocate crashkernel low memory (size:0x%llx).\n", low_size);
363 return -ENOMEM; 363 return -ENOMEM;
364 } 364 }
365 365
366 pr_info("crashkernel low memory reserv 366 pr_info("crashkernel low memory reserved: 0x%08llx - 0x%08llx (%lld MB)\n",
367 low_base, low_base + low_size, 367 low_base, low_base + low_size, low_size >> 20);
368 368
369 crashk_low_res.start = low_base; 369 crashk_low_res.start = low_base;
370 crashk_low_res.end = low_base + low_ 370 crashk_low_res.end = low_base + low_size - 1;
371 #ifdef HAVE_ARCH_ADD_CRASH_RES_TO_IOMEM_EARLY 371 #ifdef HAVE_ARCH_ADD_CRASH_RES_TO_IOMEM_EARLY
372 insert_resource(&iomem_resource, &cras 372 insert_resource(&iomem_resource, &crashk_low_res);
373 #endif 373 #endif
374 #endif 374 #endif
375 return 0; 375 return 0;
376 } 376 }
377 377
378 void __init reserve_crashkernel_generic(char * 378 void __init reserve_crashkernel_generic(char *cmdline,
379 unsigned long lon 379 unsigned long long crash_size,
380 unsigned long lon 380 unsigned long long crash_base,
381 unsigned long lon 381 unsigned long long crash_low_size,
382 bool high) 382 bool high)
383 { 383 {
384 unsigned long long search_end = CRASH_ 384 unsigned long long search_end = CRASH_ADDR_LOW_MAX, search_base = 0;
385 bool fixed_base = false; 385 bool fixed_base = false;
386 386
387 /* User specifies base address explici 387 /* User specifies base address explicitly. */
388 if (crash_base) { 388 if (crash_base) {
389 fixed_base = true; 389 fixed_base = true;
390 search_base = crash_base; 390 search_base = crash_base;
391 search_end = crash_base + cras 391 search_end = crash_base + crash_size;
392 } else if (high) { 392 } else if (high) {
393 search_base = CRASH_ADDR_LOW_M 393 search_base = CRASH_ADDR_LOW_MAX;
394 search_end = CRASH_ADDR_HIGH_M 394 search_end = CRASH_ADDR_HIGH_MAX;
395 } 395 }
396 396
397 retry: 397 retry:
398 crash_base = memblock_phys_alloc_range 398 crash_base = memblock_phys_alloc_range(crash_size, CRASH_ALIGN,
399 399 search_base, search_end);
400 if (!crash_base) { 400 if (!crash_base) {
401 /* 401 /*
402 * For crashkernel=size[KMG]@o 402 * For crashkernel=size[KMG]@offset[KMG], print out failure
403 * message if can't reserve th 403 * message if can't reserve the specified region.
404 */ 404 */
405 if (fixed_base) { 405 if (fixed_base) {
406 pr_warn("crashkernel r 406 pr_warn("crashkernel reservation failed - memory is in use.\n");
407 return; 407 return;
408 } 408 }
409 409
410 /* 410 /*
411 * For crashkernel=size[KMG], 411 * For crashkernel=size[KMG], if the first attempt was for
412 * low memory, fall back to hi 412 * low memory, fall back to high memory, the minimum required
413 * low memory will be reserved 413 * low memory will be reserved later.
414 */ 414 */
415 if (!high && search_end == CRA 415 if (!high && search_end == CRASH_ADDR_LOW_MAX) {
416 search_end = CRASH_ADD 416 search_end = CRASH_ADDR_HIGH_MAX;
417 search_base = CRASH_AD 417 search_base = CRASH_ADDR_LOW_MAX;
418 crash_low_size = DEFAU 418 crash_low_size = DEFAULT_CRASH_KERNEL_LOW_SIZE;
419 goto retry; 419 goto retry;
420 } 420 }
421 421
422 /* 422 /*
423 * For crashkernel=size[KMG],h 423 * For crashkernel=size[KMG],high, if the first attempt was
424 * for high memory, fall back 424 * for high memory, fall back to low memory.
425 */ 425 */
426 if (high && search_end == CRAS 426 if (high && search_end == CRASH_ADDR_HIGH_MAX) {
427 search_end = CRASH_ADD 427 search_end = CRASH_ADDR_LOW_MAX;
428 search_base = 0; 428 search_base = 0;
429 if (search_end != CRAS 429 if (search_end != CRASH_ADDR_HIGH_MAX)
430 goto retry; 430 goto retry;
431 } 431 }
432 pr_warn("cannot allocate crash 432 pr_warn("cannot allocate crashkernel (size:0x%llx)\n",
433 crash_size); 433 crash_size);
434 return; 434 return;
435 } 435 }
436 436
437 if ((crash_base >= CRASH_ADDR_LOW_MAX) 437 if ((crash_base >= CRASH_ADDR_LOW_MAX) &&
438 crash_low_size && reserve_crashke 438 crash_low_size && reserve_crashkernel_low(crash_low_size)) {
439 memblock_phys_free(crash_base, 439 memblock_phys_free(crash_base, crash_size);
440 return; 440 return;
441 } 441 }
442 442
443 pr_info("crashkernel reserved: 0x%016l 443 pr_info("crashkernel reserved: 0x%016llx - 0x%016llx (%lld MB)\n",
444 crash_base, crash_base + crash 444 crash_base, crash_base + crash_size, crash_size >> 20);
445 445
446 /* 446 /*
447 * The crashkernel memory will be remo 447 * The crashkernel memory will be removed from the kernel linear
448 * map. Inform kmemleak so that it won 448 * map. Inform kmemleak so that it won't try to access it.
449 */ 449 */
450 kmemleak_ignore_phys(crash_base); 450 kmemleak_ignore_phys(crash_base);
451 if (crashk_low_res.end) 451 if (crashk_low_res.end)
452 kmemleak_ignore_phys(crashk_lo 452 kmemleak_ignore_phys(crashk_low_res.start);
453 453
454 crashk_res.start = crash_base; 454 crashk_res.start = crash_base;
455 crashk_res.end = crash_base + crash_si 455 crashk_res.end = crash_base + crash_size - 1;
456 #ifdef HAVE_ARCH_ADD_CRASH_RES_TO_IOMEM_EARLY 456 #ifdef HAVE_ARCH_ADD_CRASH_RES_TO_IOMEM_EARLY
457 insert_resource(&iomem_resource, &cras 457 insert_resource(&iomem_resource, &crashk_res);
458 #endif 458 #endif
459 } 459 }
460 460
461 #ifndef HAVE_ARCH_ADD_CRASH_RES_TO_IOMEM_EARLY 461 #ifndef HAVE_ARCH_ADD_CRASH_RES_TO_IOMEM_EARLY
462 static __init int insert_crashkernel_resources 462 static __init int insert_crashkernel_resources(void)
463 { 463 {
464 if (crashk_res.start < crashk_res.end) 464 if (crashk_res.start < crashk_res.end)
465 insert_resource(&iomem_resourc 465 insert_resource(&iomem_resource, &crashk_res);
466 466
467 if (crashk_low_res.start < crashk_low_ 467 if (crashk_low_res.start < crashk_low_res.end)
468 insert_resource(&iomem_resourc 468 insert_resource(&iomem_resource, &crashk_low_res);
469 469
470 return 0; 470 return 0;
471 } 471 }
472 early_initcall(insert_crashkernel_resources); 472 early_initcall(insert_crashkernel_resources);
473 #endif 473 #endif
474 #endif 474 #endif
475 475
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