1 /* 2 * zcore module to export memory content and register sets for creating system 3 * dumps on SCSI disks (zfcpdump). The "zcore/mem" debugfs file shows the same 4 * dump format as s390 standalone dumps. 5 * 6 * For more information please refer to Documentation/s390/zfcpdump.txt 7 * 8 * Copyright IBM Corp. 2003, 2008 9 * Author(s): Michael Holzheu 10 */ 11 12 #define KMSG_COMPONENT "zdump" 13 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt 14 15 #include <linux/init.h> 16 #include <linux/slab.h> 17 #include <linux/miscdevice.h> 18 #include <linux/debugfs.h> 19 #include <linux/module.h> 20 #include <asm/asm-offsets.h> 21 #include <asm/ipl.h> 22 #include <asm/sclp.h> 23 #include <asm/setup.h> 24 #include <asm/uaccess.h> 25 #include <asm/debug.h> 26 #include <asm/processor.h> 27 #include <asm/irqflags.h> 28 #include <asm/checksum.h> 29 #include "sclp.h" 30 31 #define TRACE(x...) debug_sprintf_event(zcore_dbf, 1, x) 32 33 #define TO_USER 1 34 #define TO_KERNEL 0 35 #define CHUNK_INFO_SIZE 34 /* 2 16-byte char, each followed by blank */ 36 37 enum arch_id { 38 ARCH_S390 = 0, 39 ARCH_S390X = 1, 40 }; 41 42 /* dump system info */ 43 44 struct sys_info { 45 enum arch_id arch; 46 unsigned long sa_base; 47 u32 sa_size; 48 int cpu_map[NR_CPUS]; 49 unsigned long mem_size; 50 struct save_area lc_mask; 51 }; 52 53 struct ipib_info { 54 unsigned long ipib; 55 u32 checksum; 56 } __attribute__((packed)); 57 58 static struct sys_info sys_info; 59 static struct debug_info *zcore_dbf; 60 static int hsa_available; 61 static struct dentry *zcore_dir; 62 static struct dentry *zcore_file; 63 static struct dentry *zcore_memmap_file; 64 static struct dentry *zcore_reipl_file; 65 static struct dentry *zcore_hsa_file; 66 static struct ipl_parameter_block *ipl_block; 67 68 /* 69 * Copy memory from HSA to kernel or user memory (not reentrant): 70 * 71 * @dest: Kernel or user buffer where memory should be copied to 72 * @src: Start address within HSA where data should be copied 73 * @count: Size of buffer, which should be copied 74 * @mode: Either TO_KERNEL or TO_USER 75 */ 76 int memcpy_hsa(void *dest, unsigned long src, size_t count, int mode) 77 { 78 int offs, blk_num; 79 static char buf[PAGE_SIZE] __attribute__((__aligned__(PAGE_SIZE))); 80 81 if (!hsa_available) 82 return -ENODATA; 83 if (count == 0) 84 return 0; 85 86 /* copy first block */ 87 offs = 0; 88 if ((src % PAGE_SIZE) != 0) { 89 blk_num = src / PAGE_SIZE + 2; 90 if (sclp_sdias_copy(buf, blk_num, 1)) { 91 TRACE("sclp_sdias_copy() failed\n"); 92 return -EIO; 93 } 94 offs = min((PAGE_SIZE - (src % PAGE_SIZE)), count); 95 if (mode == TO_USER) { 96 if (copy_to_user((__force __user void*) dest, 97 buf + (src % PAGE_SIZE), offs)) 98 return -EFAULT; 99 } else 100 memcpy(dest, buf + (src % PAGE_SIZE), offs); 101 } 102 if (offs == count) 103 goto out; 104 105 /* copy middle */ 106 for (; (offs + PAGE_SIZE) <= count; offs += PAGE_SIZE) { 107 blk_num = (src + offs) / PAGE_SIZE + 2; 108 if (sclp_sdias_copy(buf, blk_num, 1)) { 109 TRACE("sclp_sdias_copy() failed\n"); 110 return -EIO; 111 } 112 if (mode == TO_USER) { 113 if (copy_to_user((__force __user void*) dest + offs, 114 buf, PAGE_SIZE)) 115 return -EFAULT; 116 } else 117 memcpy(dest + offs, buf, PAGE_SIZE); 118 } 119 if (offs == count) 120 goto out; 121 122 /* copy last block */ 123 blk_num = (src + offs) / PAGE_SIZE + 2; 124 if (sclp_sdias_copy(buf, blk_num, 1)) { 125 TRACE("sclp_sdias_copy() failed\n"); 126 return -EIO; 127 } 128 if (mode == TO_USER) { 129 if (copy_to_user((__force __user void*) dest + offs, buf, 130 count - offs)) 131 return -EFAULT; 132 } else 133 memcpy(dest + offs, buf, count - offs); 134 out: 135 return 0; 136 } 137 138 static int memcpy_hsa_user(void __user *dest, unsigned long src, size_t count) 139 { 140 return memcpy_hsa((void __force *) dest, src, count, TO_USER); 141 } 142 143 static int memcpy_hsa_kernel(void *dest, unsigned long src, size_t count) 144 { 145 return memcpy_hsa(dest, src, count, TO_KERNEL); 146 } 147 148 static int __init init_cpu_info(enum arch_id arch) 149 { 150 struct save_area *sa; 151 152 /* get info for boot cpu from lowcore, stored in the HSA */ 153 154 sa = kmalloc(sizeof(*sa), GFP_KERNEL); 155 if (!sa) 156 return -ENOMEM; 157 if (memcpy_hsa_kernel(sa, sys_info.sa_base, sys_info.sa_size) < 0) { 158 TRACE("could not copy from HSA\n"); 159 kfree(sa); 160 return -EIO; 161 } 162 zfcpdump_save_areas[0] = sa; 163 return 0; 164 } 165 166 static DEFINE_MUTEX(zcore_mutex); 167 168 #define DUMP_VERSION 0x5 169 #define DUMP_MAGIC 0xa8190173618f23fdULL 170 #define DUMP_ARCH_S390X 2 171 #define DUMP_ARCH_S390 1 172 #define HEADER_SIZE 4096 173 174 /* dump header dumped according to s390 crash dump format */ 175 176 struct zcore_header { 177 u64 magic; 178 u32 version; 179 u32 header_size; 180 u32 dump_level; 181 u32 page_size; 182 u64 mem_size; 183 u64 mem_start; 184 u64 mem_end; 185 u32 num_pages; 186 u32 pad1; 187 u64 tod; 188 struct cpuid cpu_id; 189 u32 arch_id; 190 u32 volnr; 191 u32 build_arch; 192 u64 rmem_size; 193 u8 mvdump; 194 u16 cpu_cnt; 195 u16 real_cpu_cnt; 196 u8 end_pad1[0x200-0x061]; 197 u64 mvdump_sign; 198 u64 mvdump_zipl_time; 199 u8 end_pad2[0x800-0x210]; 200 u32 lc_vec[512]; 201 } __attribute__((packed,__aligned__(16))); 202 203 static struct zcore_header zcore_header = { 204 .magic = DUMP_MAGIC, 205 .version = DUMP_VERSION, 206 .header_size = 4096, 207 .dump_level = 0, 208 .page_size = PAGE_SIZE, 209 .mem_start = 0, 210 #ifdef CONFIG_64BIT 211 .build_arch = DUMP_ARCH_S390X, 212 #else 213 .build_arch = DUMP_ARCH_S390, 214 #endif 215 }; 216 217 /* 218 * Copy lowcore info to buffer. Use map in order to copy only register parts. 219 * 220 * @buf: User buffer 221 * @sa: Pointer to save area 222 * @sa_off: Offset in save area to copy 223 * @len: Number of bytes to copy 224 */ 225 static int copy_lc(void __user *buf, void *sa, int sa_off, int len) 226 { 227 int i; 228 char *lc_mask = (char*)&sys_info.lc_mask; 229 230 for (i = 0; i < len; i++) { 231 if (!lc_mask[i + sa_off]) 232 continue; 233 if (copy_to_user(buf + i, sa + sa_off + i, 1)) 234 return -EFAULT; 235 } 236 return 0; 237 } 238 239 /* 240 * Copy lowcores info to memory, if necessary 241 * 242 * @buf: User buffer 243 * @addr: Start address of buffer in dump memory 244 * @count: Size of buffer 245 */ 246 static int zcore_add_lc(char __user *buf, unsigned long start, size_t count) 247 { 248 unsigned long end; 249 int i = 0; 250 251 if (count == 0) 252 return 0; 253 254 end = start + count; 255 while (zfcpdump_save_areas[i]) { 256 unsigned long cp_start, cp_end; /* copy range */ 257 unsigned long sa_start, sa_end; /* save area range */ 258 unsigned long prefix; 259 unsigned long sa_off, len, buf_off; 260 261 prefix = zfcpdump_save_areas[i]->pref_reg; 262 sa_start = prefix + sys_info.sa_base; 263 sa_end = prefix + sys_info.sa_base + sys_info.sa_size; 264 265 if ((end < sa_start) || (start > sa_end)) 266 goto next; 267 cp_start = max(start, sa_start); 268 cp_end = min(end, sa_end); 269 270 buf_off = cp_start - start; 271 sa_off = cp_start - sa_start; 272 len = cp_end - cp_start; 273 274 TRACE("copy_lc for: %lx\n", start); 275 if (copy_lc(buf + buf_off, zfcpdump_save_areas[i], sa_off, len)) 276 return -EFAULT; 277 next: 278 i++; 279 } 280 return 0; 281 } 282 283 /* 284 * Release the HSA 285 */ 286 static void release_hsa(void) 287 { 288 diag308(DIAG308_REL_HSA, NULL); 289 hsa_available = 0; 290 } 291 292 /* 293 * Read routine for zcore character device 294 * First 4K are dump header 295 * Next 32MB are HSA Memory 296 * Rest is read from absolute Memory 297 */ 298 static ssize_t zcore_read(struct file *file, char __user *buf, size_t count, 299 loff_t *ppos) 300 { 301 unsigned long mem_start; /* Start address in memory */ 302 size_t mem_offs; /* Offset in dump memory */ 303 size_t hdr_count; /* Size of header part of output buffer */ 304 size_t size; 305 int rc; 306 307 mutex_lock(&zcore_mutex); 308 309 if (*ppos > (sys_info.mem_size + HEADER_SIZE)) { 310 rc = -EINVAL; 311 goto fail; 312 } 313 314 count = min(count, (size_t) (sys_info.mem_size + HEADER_SIZE - *ppos)); 315 316 /* Copy dump header */ 317 if (*ppos < HEADER_SIZE) { 318 size = min(count, (size_t) (HEADER_SIZE - *ppos)); 319 if (copy_to_user(buf, &zcore_header + *ppos, size)) { 320 rc = -EFAULT; 321 goto fail; 322 } 323 hdr_count = size; 324 mem_start = 0; 325 } else { 326 hdr_count = 0; 327 mem_start = *ppos - HEADER_SIZE; 328 } 329 330 mem_offs = 0; 331 332 /* Copy from HSA data */ 333 if (*ppos < (ZFCPDUMP_HSA_SIZE + HEADER_SIZE)) { 334 size = min((count - hdr_count), (size_t) (ZFCPDUMP_HSA_SIZE 335 - mem_start)); 336 rc = memcpy_hsa_user(buf + hdr_count, mem_start, size); 337 if (rc) 338 goto fail; 339 340 mem_offs += size; 341 } 342 343 /* Copy from real mem */ 344 size = count - mem_offs - hdr_count; 345 rc = copy_to_user_real(buf + hdr_count + mem_offs, 346 (void *) mem_start + mem_offs, size); 347 if (rc) 348 goto fail; 349 350 /* 351 * Since s390 dump analysis tools like lcrash or crash 352 * expect register sets in the prefix pages of the cpus, 353 * we copy them into the read buffer, if necessary. 354 * buf + hdr_count: Start of memory part of output buffer 355 * mem_start: Start memory address to copy from 356 * count - hdr_count: Size of memory area to copy 357 */ 358 if (zcore_add_lc(buf + hdr_count, mem_start, count - hdr_count)) { 359 rc = -EFAULT; 360 goto fail; 361 } 362 *ppos += count; 363 fail: 364 mutex_unlock(&zcore_mutex); 365 return (rc < 0) ? rc : count; 366 } 367 368 static int zcore_open(struct inode *inode, struct file *filp) 369 { 370 if (!hsa_available) 371 return -ENODATA; 372 else 373 return capable(CAP_SYS_RAWIO) ? 0 : -EPERM; 374 } 375 376 static int zcore_release(struct inode *inode, struct file *filep) 377 { 378 if (hsa_available) 379 release_hsa(); 380 return 0; 381 } 382 383 static loff_t zcore_lseek(struct file *file, loff_t offset, int orig) 384 { 385 loff_t rc; 386 387 mutex_lock(&zcore_mutex); 388 switch (orig) { 389 case 0: 390 file->f_pos = offset; 391 rc = file->f_pos; 392 break; 393 case 1: 394 file->f_pos += offset; 395 rc = file->f_pos; 396 break; 397 default: 398 rc = -EINVAL; 399 } 400 mutex_unlock(&zcore_mutex); 401 return rc; 402 } 403 404 static const struct file_operations zcore_fops = { 405 .owner = THIS_MODULE, 406 .llseek = zcore_lseek, 407 .read = zcore_read, 408 .open = zcore_open, 409 .release = zcore_release, 410 }; 411 412 static ssize_t zcore_memmap_read(struct file *filp, char __user *buf, 413 size_t count, loff_t *ppos) 414 { 415 return simple_read_from_buffer(buf, count, ppos, filp->private_data, 416 MEMORY_CHUNKS * CHUNK_INFO_SIZE); 417 } 418 419 static int zcore_memmap_open(struct inode *inode, struct file *filp) 420 { 421 int i; 422 char *buf; 423 struct mem_chunk *chunk_array; 424 425 chunk_array = kzalloc(MEMORY_CHUNKS * sizeof(struct mem_chunk), 426 GFP_KERNEL); 427 if (!chunk_array) 428 return -ENOMEM; 429 detect_memory_layout(chunk_array, 0); 430 buf = kzalloc(MEMORY_CHUNKS * CHUNK_INFO_SIZE, GFP_KERNEL); 431 if (!buf) { 432 kfree(chunk_array); 433 return -ENOMEM; 434 } 435 for (i = 0; i < MEMORY_CHUNKS; i++) { 436 sprintf(buf + (i * CHUNK_INFO_SIZE), "%016llx %016llx ", 437 (unsigned long long) chunk_array[i].addr, 438 (unsigned long long) chunk_array[i].size); 439 if (chunk_array[i].size == 0) 440 break; 441 } 442 kfree(chunk_array); 443 filp->private_data = buf; 444 return nonseekable_open(inode, filp); 445 } 446 447 static int zcore_memmap_release(struct inode *inode, struct file *filp) 448 { 449 kfree(filp->private_data); 450 return 0; 451 } 452 453 static const struct file_operations zcore_memmap_fops = { 454 .owner = THIS_MODULE, 455 .read = zcore_memmap_read, 456 .open = zcore_memmap_open, 457 .release = zcore_memmap_release, 458 .llseek = no_llseek, 459 }; 460 461 static ssize_t zcore_reipl_write(struct file *filp, const char __user *buf, 462 size_t count, loff_t *ppos) 463 { 464 if (ipl_block) { 465 diag308(DIAG308_SET, ipl_block); 466 diag308(DIAG308_IPL, NULL); 467 } 468 return count; 469 } 470 471 static int zcore_reipl_open(struct inode *inode, struct file *filp) 472 { 473 return nonseekable_open(inode, filp); 474 } 475 476 static int zcore_reipl_release(struct inode *inode, struct file *filp) 477 { 478 return 0; 479 } 480 481 static const struct file_operations zcore_reipl_fops = { 482 .owner = THIS_MODULE, 483 .write = zcore_reipl_write, 484 .open = zcore_reipl_open, 485 .release = zcore_reipl_release, 486 .llseek = no_llseek, 487 }; 488 489 static ssize_t zcore_hsa_read(struct file *filp, char __user *buf, 490 size_t count, loff_t *ppos) 491 { 492 static char str[18]; 493 494 if (hsa_available) 495 snprintf(str, sizeof(str), "%lx\n", ZFCPDUMP_HSA_SIZE); 496 else 497 snprintf(str, sizeof(str), "0\n"); 498 return simple_read_from_buffer(buf, count, ppos, str, strlen(str)); 499 } 500 501 static ssize_t zcore_hsa_write(struct file *filp, const char __user *buf, 502 size_t count, loff_t *ppos) 503 { 504 char value; 505 506 if (*ppos != 0) 507 return -EPIPE; 508 if (copy_from_user(&value, buf, 1)) 509 return -EFAULT; 510 if (value != '0') 511 return -EINVAL; 512 release_hsa(); 513 return count; 514 } 515 516 static const struct file_operations zcore_hsa_fops = { 517 .owner = THIS_MODULE, 518 .write = zcore_hsa_write, 519 .read = zcore_hsa_read, 520 .open = nonseekable_open, 521 .llseek = no_llseek, 522 }; 523 524 #ifdef CONFIG_32BIT 525 526 static void __init set_lc_mask(struct save_area *map) 527 { 528 memset(&map->ext_save, 0xff, sizeof(map->ext_save)); 529 memset(&map->timer, 0xff, sizeof(map->timer)); 530 memset(&map->clk_cmp, 0xff, sizeof(map->clk_cmp)); 531 memset(&map->psw, 0xff, sizeof(map->psw)); 532 memset(&map->pref_reg, 0xff, sizeof(map->pref_reg)); 533 memset(&map->acc_regs, 0xff, sizeof(map->acc_regs)); 534 memset(&map->fp_regs, 0xff, sizeof(map->fp_regs)); 535 memset(&map->gp_regs, 0xff, sizeof(map->gp_regs)); 536 memset(&map->ctrl_regs, 0xff, sizeof(map->ctrl_regs)); 537 } 538 539 #else /* CONFIG_32BIT */ 540 541 static void __init set_lc_mask(struct save_area *map) 542 { 543 memset(&map->fp_regs, 0xff, sizeof(map->fp_regs)); 544 memset(&map->gp_regs, 0xff, sizeof(map->gp_regs)); 545 memset(&map->psw, 0xff, sizeof(map->psw)); 546 memset(&map->pref_reg, 0xff, sizeof(map->pref_reg)); 547 memset(&map->fp_ctrl_reg, 0xff, sizeof(map->fp_ctrl_reg)); 548 memset(&map->tod_reg, 0xff, sizeof(map->tod_reg)); 549 memset(&map->timer, 0xff, sizeof(map->timer)); 550 memset(&map->clk_cmp, 0xff, sizeof(map->clk_cmp)); 551 memset(&map->acc_regs, 0xff, sizeof(map->acc_regs)); 552 memset(&map->ctrl_regs, 0xff, sizeof(map->ctrl_regs)); 553 } 554 555 #endif /* CONFIG_32BIT */ 556 557 /* 558 * Initialize dump globals for a given architecture 559 */ 560 static int __init sys_info_init(enum arch_id arch, unsigned long mem_end) 561 { 562 int rc; 563 564 switch (arch) { 565 case ARCH_S390X: 566 pr_alert("DETECTED 'S390X (64 bit) OS'\n"); 567 break; 568 case ARCH_S390: 569 pr_alert("DETECTED 'S390 (32 bit) OS'\n"); 570 break; 571 default: 572 pr_alert("0x%x is an unknown architecture.\n",arch); 573 return -EINVAL; 574 } 575 sys_info.sa_base = SAVE_AREA_BASE; 576 sys_info.sa_size = sizeof(struct save_area); 577 sys_info.arch = arch; 578 set_lc_mask(&sys_info.lc_mask); 579 rc = init_cpu_info(arch); 580 if (rc) 581 return rc; 582 sys_info.mem_size = mem_end; 583 584 return 0; 585 } 586 587 static int __init check_sdias(void) 588 { 589 int rc, act_hsa_size; 590 591 rc = sclp_sdias_blk_count(); 592 if (rc < 0) { 593 TRACE("Could not determine HSA size\n"); 594 return rc; 595 } 596 act_hsa_size = (rc - 1) * PAGE_SIZE; 597 if (act_hsa_size < ZFCPDUMP_HSA_SIZE) { 598 TRACE("HSA size too small: %i\n", act_hsa_size); 599 return -EINVAL; 600 } 601 return 0; 602 } 603 604 static int __init get_mem_info(unsigned long *mem, unsigned long *end) 605 { 606 int i; 607 struct mem_chunk *chunk_array; 608 609 chunk_array = kzalloc(MEMORY_CHUNKS * sizeof(struct mem_chunk), 610 GFP_KERNEL); 611 if (!chunk_array) 612 return -ENOMEM; 613 detect_memory_layout(chunk_array, 0); 614 for (i = 0; i < MEMORY_CHUNKS; i++) { 615 if (chunk_array[i].size == 0) 616 break; 617 *mem += chunk_array[i].size; 618 *end = max(*end, chunk_array[i].addr + chunk_array[i].size); 619 } 620 kfree(chunk_array); 621 return 0; 622 } 623 624 static void __init zcore_header_init(int arch, struct zcore_header *hdr, 625 unsigned long mem_size) 626 { 627 u32 prefix; 628 int i; 629 630 if (arch == ARCH_S390X) 631 hdr->arch_id = DUMP_ARCH_S390X; 632 else 633 hdr->arch_id = DUMP_ARCH_S390; 634 hdr->mem_size = mem_size; 635 hdr->rmem_size = mem_size; 636 hdr->mem_end = sys_info.mem_size; 637 hdr->num_pages = mem_size / PAGE_SIZE; 638 hdr->tod = get_tod_clock(); 639 get_cpu_id(&hdr->cpu_id); 640 for (i = 0; zfcpdump_save_areas[i]; i++) { 641 prefix = zfcpdump_save_areas[i]->pref_reg; 642 hdr->real_cpu_cnt++; 643 if (!prefix) 644 continue; 645 hdr->lc_vec[hdr->cpu_cnt] = prefix; 646 hdr->cpu_cnt++; 647 } 648 } 649 650 /* 651 * Provide IPL parameter information block from either HSA or memory 652 * for future reipl 653 */ 654 static int __init zcore_reipl_init(void) 655 { 656 struct ipib_info ipib_info; 657 int rc; 658 659 rc = memcpy_hsa_kernel(&ipib_info, __LC_DUMP_REIPL, sizeof(ipib_info)); 660 if (rc) 661 return rc; 662 if (ipib_info.ipib == 0) 663 return 0; 664 ipl_block = (void *) __get_free_page(GFP_KERNEL); 665 if (!ipl_block) 666 return -ENOMEM; 667 if (ipib_info.ipib < ZFCPDUMP_HSA_SIZE) 668 rc = memcpy_hsa_kernel(ipl_block, ipib_info.ipib, PAGE_SIZE); 669 else 670 rc = memcpy_real(ipl_block, (void *) ipib_info.ipib, PAGE_SIZE); 671 if (rc || csum_partial(ipl_block, ipl_block->hdr.len, 0) != 672 ipib_info.checksum) { 673 TRACE("Checksum does not match\n"); 674 free_page((unsigned long) ipl_block); 675 ipl_block = NULL; 676 } 677 return 0; 678 } 679 680 static int __init zcore_init(void) 681 { 682 unsigned long mem_size, mem_end; 683 unsigned char arch; 684 int rc; 685 686 mem_size = mem_end = 0; 687 if (ipl_info.type != IPL_TYPE_FCP_DUMP) 688 return -ENODATA; 689 if (OLDMEM_BASE) 690 return -ENODATA; 691 692 zcore_dbf = debug_register("zcore", 4, 1, 4 * sizeof(long)); 693 debug_register_view(zcore_dbf, &debug_sprintf_view); 694 debug_set_level(zcore_dbf, 6); 695 696 TRACE("devno: %x\n", ipl_info.data.fcp.dev_id.devno); 697 TRACE("wwpn: %llx\n", (unsigned long long) ipl_info.data.fcp.wwpn); 698 TRACE("lun: %llx\n", (unsigned long long) ipl_info.data.fcp.lun); 699 700 rc = sclp_sdias_init(); 701 if (rc) 702 goto fail; 703 704 rc = check_sdias(); 705 if (rc) 706 goto fail; 707 hsa_available = 1; 708 709 rc = memcpy_hsa_kernel(&arch, __LC_AR_MODE_ID, 1); 710 if (rc) 711 goto fail; 712 713 #ifdef CONFIG_64BIT 714 if (arch == ARCH_S390) { 715 pr_alert("The 64-bit dump tool cannot be used for a " 716 "32-bit system\n"); 717 rc = -EINVAL; 718 goto fail; 719 } 720 #else /* CONFIG_64BIT */ 721 if (arch == ARCH_S390X) { 722 pr_alert("The 32-bit dump tool cannot be used for a " 723 "64-bit system\n"); 724 rc = -EINVAL; 725 goto fail; 726 } 727 #endif /* CONFIG_64BIT */ 728 729 rc = get_mem_info(&mem_size, &mem_end); 730 if (rc) 731 goto fail; 732 733 rc = sys_info_init(arch, mem_end); 734 if (rc) 735 goto fail; 736 zcore_header_init(arch, &zcore_header, mem_size); 737 738 rc = zcore_reipl_init(); 739 if (rc) 740 goto fail; 741 742 zcore_dir = debugfs_create_dir("zcore" , NULL); 743 if (!zcore_dir) { 744 rc = -ENOMEM; 745 goto fail; 746 } 747 zcore_file = debugfs_create_file("mem", S_IRUSR, zcore_dir, NULL, 748 &zcore_fops); 749 if (!zcore_file) { 750 rc = -ENOMEM; 751 goto fail_dir; 752 } 753 zcore_memmap_file = debugfs_create_file("memmap", S_IRUSR, zcore_dir, 754 NULL, &zcore_memmap_fops); 755 if (!zcore_memmap_file) { 756 rc = -ENOMEM; 757 goto fail_file; 758 } 759 zcore_reipl_file = debugfs_create_file("reipl", S_IRUSR, zcore_dir, 760 NULL, &zcore_reipl_fops); 761 if (!zcore_reipl_file) { 762 rc = -ENOMEM; 763 goto fail_memmap_file; 764 } 765 zcore_hsa_file = debugfs_create_file("hsa", S_IRUSR|S_IWUSR, zcore_dir, 766 NULL, &zcore_hsa_fops); 767 if (!zcore_hsa_file) { 768 rc = -ENOMEM; 769 goto fail_reipl_file; 770 } 771 return 0; 772 773 fail_reipl_file: 774 debugfs_remove(zcore_reipl_file); 775 fail_memmap_file: 776 debugfs_remove(zcore_memmap_file); 777 fail_file: 778 debugfs_remove(zcore_file); 779 fail_dir: 780 debugfs_remove(zcore_dir); 781 fail: 782 diag308(DIAG308_REL_HSA, NULL); 783 return rc; 784 } 785 786 static void __exit zcore_exit(void) 787 { 788 debug_unregister(zcore_dbf); 789 sclp_sdias_exit(); 790 free_page((unsigned long) ipl_block); 791 debugfs_remove(zcore_hsa_file); 792 debugfs_remove(zcore_reipl_file); 793 debugfs_remove(zcore_memmap_file); 794 debugfs_remove(zcore_file); 795 debugfs_remove(zcore_dir); 796 diag308(DIAG308_REL_HSA, NULL); 797 } 798 799 MODULE_AUTHOR("Copyright IBM Corp. 2003,2008"); 800 MODULE_DESCRIPTION("zcore module for zfcpdump support"); 801 MODULE_LICENSE("GPL"); 802 803 subsys_initcall(zcore_init); 804 module_exit(zcore_exit); 805