1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * ipl/reipl/dump support for Linux on s390. 4 * 5 * Copyright IBM Corp. 2005, 2012 6 * Author(s): Michael Holzheu <holzheu@de.ibm.com> 7 * Volker Sameske <sameske@de.ibm.com> 8 */ 9 10 #include <linux/types.h> 11 #include <linux/export.h> 12 #include <linux/init.h> 13 #include <linux/device.h> 14 #include <linux/delay.h> 15 #include <linux/kstrtox.h> 16 #include <linux/panic_notifier.h> 17 #include <linux/reboot.h> 18 #include <linux/ctype.h> 19 #include <linux/fs.h> 20 #include <linux/gfp.h> 21 #include <linux/crash_dump.h> 22 #include <linux/debug_locks.h> 23 #include <asm/asm-extable.h> 24 #include <asm/diag.h> 25 #include <asm/ipl.h> 26 #include <asm/smp.h> 27 #include <asm/setup.h> 28 #include <asm/cpcmd.h> 29 #include <asm/ebcdic.h> 30 #include <asm/sclp.h> 31 #include <asm/checksum.h> 32 #include <asm/debug.h> 33 #include <asm/abs_lowcore.h> 34 #include <asm/os_info.h> 35 #include <asm/sections.h> 36 #include <asm/boot_data.h> 37 #include "entry.h" 38 39 #define IPL_PARM_BLOCK_VERSION 0 40 41 #define IPL_UNKNOWN_STR "unknown" 42 #define IPL_CCW_STR "ccw" 43 #define IPL_ECKD_STR "eckd" 44 #define IPL_ECKD_DUMP_STR "eckd_dump" 45 #define IPL_FCP_STR "fcp" 46 #define IPL_FCP_DUMP_STR "fcp_dump" 47 #define IPL_NVME_STR "nvme" 48 #define IPL_NVME_DUMP_STR "nvme_dump" 49 #define IPL_NSS_STR "nss" 50 51 #define DUMP_CCW_STR "ccw" 52 #define DUMP_ECKD_STR "eckd" 53 #define DUMP_FCP_STR "fcp" 54 #define DUMP_NVME_STR "nvme" 55 #define DUMP_NONE_STR "none" 56 57 /* 58 * Four shutdown trigger types are supported: 59 * - panic 60 * - halt 61 * - power off 62 * - reipl 63 * - restart 64 */ 65 #define ON_PANIC_STR "on_panic" 66 #define ON_HALT_STR "on_halt" 67 #define ON_POFF_STR "on_poff" 68 #define ON_REIPL_STR "on_reboot" 69 #define ON_RESTART_STR "on_restart" 70 71 struct shutdown_action; 72 struct shutdown_trigger { 73 char *name; 74 struct shutdown_action *action; 75 }; 76 77 /* 78 * The following shutdown action types are supported: 79 */ 80 #define SHUTDOWN_ACTION_IPL_STR "ipl" 81 #define SHUTDOWN_ACTION_REIPL_STR "reipl" 82 #define SHUTDOWN_ACTION_DUMP_STR "dump" 83 #define SHUTDOWN_ACTION_VMCMD_STR "vmcmd" 84 #define SHUTDOWN_ACTION_STOP_STR "stop" 85 #define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl" 86 87 struct shutdown_action { 88 char *name; 89 void (*fn) (struct shutdown_trigger *trigger); 90 int (*init) (void); 91 int init_rc; 92 }; 93 94 static char *ipl_type_str(enum ipl_type type) 95 { 96 switch (type) { 97 case IPL_TYPE_CCW: 98 return IPL_CCW_STR; 99 case IPL_TYPE_ECKD: 100 return IPL_ECKD_STR; 101 case IPL_TYPE_ECKD_DUMP: 102 return IPL_ECKD_DUMP_STR; 103 case IPL_TYPE_FCP: 104 return IPL_FCP_STR; 105 case IPL_TYPE_FCP_DUMP: 106 return IPL_FCP_DUMP_STR; 107 case IPL_TYPE_NSS: 108 return IPL_NSS_STR; 109 case IPL_TYPE_NVME: 110 return IPL_NVME_STR; 111 case IPL_TYPE_NVME_DUMP: 112 return IPL_NVME_DUMP_STR; 113 case IPL_TYPE_UNKNOWN: 114 default: 115 return IPL_UNKNOWN_STR; 116 } 117 } 118 119 enum dump_type { 120 DUMP_TYPE_NONE = 1, 121 DUMP_TYPE_CCW = 2, 122 DUMP_TYPE_FCP = 4, 123 DUMP_TYPE_NVME = 8, 124 DUMP_TYPE_ECKD = 16, 125 }; 126 127 static char *dump_type_str(enum dump_type type) 128 { 129 switch (type) { 130 case DUMP_TYPE_NONE: 131 return DUMP_NONE_STR; 132 case DUMP_TYPE_CCW: 133 return DUMP_CCW_STR; 134 case DUMP_TYPE_ECKD: 135 return DUMP_ECKD_STR; 136 case DUMP_TYPE_FCP: 137 return DUMP_FCP_STR; 138 case DUMP_TYPE_NVME: 139 return DUMP_NVME_STR; 140 default: 141 return NULL; 142 } 143 } 144 145 int __bootdata_preserved(ipl_block_valid); 146 struct ipl_parameter_block __bootdata_preserved(ipl_block); 147 int __bootdata_preserved(ipl_secure_flag); 148 149 unsigned long __bootdata_preserved(ipl_cert_list_addr); 150 unsigned long __bootdata_preserved(ipl_cert_list_size); 151 152 unsigned long __bootdata(early_ipl_comp_list_addr); 153 unsigned long __bootdata(early_ipl_comp_list_size); 154 155 static int reipl_capabilities = IPL_TYPE_UNKNOWN; 156 157 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN; 158 static struct ipl_parameter_block *reipl_block_fcp; 159 static struct ipl_parameter_block *reipl_block_nvme; 160 static struct ipl_parameter_block *reipl_block_ccw; 161 static struct ipl_parameter_block *reipl_block_eckd; 162 static struct ipl_parameter_block *reipl_block_nss; 163 static struct ipl_parameter_block *reipl_block_actual; 164 165 static int dump_capabilities = DUMP_TYPE_NONE; 166 static enum dump_type dump_type = DUMP_TYPE_NONE; 167 static struct ipl_parameter_block *dump_block_fcp; 168 static struct ipl_parameter_block *dump_block_nvme; 169 static struct ipl_parameter_block *dump_block_ccw; 170 static struct ipl_parameter_block *dump_block_eckd; 171 172 static struct sclp_ipl_info sclp_ipl_info; 173 174 static bool reipl_nvme_clear; 175 static bool reipl_fcp_clear; 176 static bool reipl_ccw_clear; 177 static bool reipl_eckd_clear; 178 179 static unsigned long os_info_flags; 180 181 static inline int __diag308(unsigned long subcode, unsigned long addr) 182 { 183 union register_pair r1; 184 185 r1.even = addr; 186 r1.odd = 0; 187 asm volatile( 188 " diag %[r1],%[subcode],0x308\n" 189 "0: nopr %%r7\n" 190 EX_TABLE(0b,0b) 191 : [r1] "+&d" (r1.pair) 192 : [subcode] "d" (subcode) 193 : "cc", "memory"); 194 return r1.odd; 195 } 196 197 int diag308(unsigned long subcode, void *addr) 198 { 199 diag_stat_inc(DIAG_STAT_X308); 200 return __diag308(subcode, addr ? virt_to_phys(addr) : 0); 201 } 202 EXPORT_SYMBOL_GPL(diag308); 203 204 /* SYSFS */ 205 206 #define IPL_ATTR_SHOW_FN(_prefix, _name, _format, args...) \ 207 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \ 208 struct kobj_attribute *attr, \ 209 char *page) \ 210 { \ 211 return scnprintf(page, PAGE_SIZE, _format, ##args); \ 212 } 213 214 #define IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk) \ 215 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \ 216 struct kobj_attribute *attr, \ 217 const char *buf, size_t len) \ 218 { \ 219 unsigned long long ssid, devno; \ 220 \ 221 if (sscanf(buf, "0.%llx.%llx\n", &ssid, &devno) != 2) \ 222 return -EINVAL; \ 223 \ 224 if (ssid > __MAX_SSID || devno > __MAX_SUBCHANNEL) \ 225 return -EINVAL; \ 226 \ 227 _ipl_blk.ssid = ssid; \ 228 _ipl_blk.devno = devno; \ 229 return len; \ 230 } 231 232 #define DEFINE_IPL_CCW_ATTR_RW(_prefix, _name, _ipl_blk) \ 233 IPL_ATTR_SHOW_FN(_prefix, _name, "0.%x.%04x\n", \ 234 _ipl_blk.ssid, _ipl_blk.devno); \ 235 IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk); \ 236 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ 237 __ATTR(_name, 0644, \ 238 sys_##_prefix##_##_name##_show, \ 239 sys_##_prefix##_##_name##_store) \ 240 241 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \ 242 IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value) \ 243 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ 244 __ATTR(_name, 0444, sys_##_prefix##_##_name##_show, NULL) 245 246 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \ 247 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value) \ 248 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \ 249 struct kobj_attribute *attr, \ 250 const char *buf, size_t len) \ 251 { \ 252 unsigned long long value; \ 253 if (sscanf(buf, _fmt_in, &value) != 1) \ 254 return -EINVAL; \ 255 _value = value; \ 256 return len; \ 257 } \ 258 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ 259 __ATTR(_name, 0644, \ 260 sys_##_prefix##_##_name##_show, \ 261 sys_##_prefix##_##_name##_store) 262 263 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\ 264 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, _value) \ 265 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \ 266 struct kobj_attribute *attr, \ 267 const char *buf, size_t len) \ 268 { \ 269 strncpy(_value, buf, sizeof(_value) - 1); \ 270 strim(_value); \ 271 return len; \ 272 } \ 273 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ 274 __ATTR(_name, 0644, \ 275 sys_##_prefix##_##_name##_show, \ 276 sys_##_prefix##_##_name##_store) 277 278 /* 279 * ipl section 280 */ 281 282 static __init enum ipl_type get_ipl_type(void) 283 { 284 if (!ipl_block_valid) 285 return IPL_TYPE_UNKNOWN; 286 287 switch (ipl_block.pb0_hdr.pbt) { 288 case IPL_PBT_CCW: 289 return IPL_TYPE_CCW; 290 case IPL_PBT_FCP: 291 if (ipl_block.fcp.opt == IPL_PB0_FCP_OPT_DUMP) 292 return IPL_TYPE_FCP_DUMP; 293 else 294 return IPL_TYPE_FCP; 295 case IPL_PBT_NVME: 296 if (ipl_block.nvme.opt == IPL_PB0_NVME_OPT_DUMP) 297 return IPL_TYPE_NVME_DUMP; 298 else 299 return IPL_TYPE_NVME; 300 case IPL_PBT_ECKD: 301 if (ipl_block.eckd.opt == IPL_PB0_ECKD_OPT_DUMP) 302 return IPL_TYPE_ECKD_DUMP; 303 else 304 return IPL_TYPE_ECKD; 305 } 306 return IPL_TYPE_UNKNOWN; 307 } 308 309 struct ipl_info ipl_info; 310 EXPORT_SYMBOL_GPL(ipl_info); 311 312 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr, 313 char *page) 314 { 315 return sprintf(page, "%s\n", ipl_type_str(ipl_info.type)); 316 } 317 318 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type); 319 320 static ssize_t ipl_secure_show(struct kobject *kobj, 321 struct kobj_attribute *attr, char *page) 322 { 323 return sprintf(page, "%i\n", !!ipl_secure_flag); 324 } 325 326 static struct kobj_attribute sys_ipl_secure_attr = 327 __ATTR(secure, 0444, ipl_secure_show, NULL); 328 329 static ssize_t ipl_has_secure_show(struct kobject *kobj, 330 struct kobj_attribute *attr, char *page) 331 { 332 return sprintf(page, "%i\n", !!sclp.has_sipl); 333 } 334 335 static struct kobj_attribute sys_ipl_has_secure_attr = 336 __ATTR(has_secure, 0444, ipl_has_secure_show, NULL); 337 338 static ssize_t ipl_vm_parm_show(struct kobject *kobj, 339 struct kobj_attribute *attr, char *page) 340 { 341 char parm[DIAG308_VMPARM_SIZE + 1] = {}; 342 343 if (ipl_block_valid && (ipl_block.pb0_hdr.pbt == IPL_PBT_CCW)) 344 ipl_block_get_ascii_vmparm(parm, sizeof(parm), &ipl_block); 345 return sprintf(page, "%s\n", parm); 346 } 347 348 static struct kobj_attribute sys_ipl_vm_parm_attr = 349 __ATTR(parm, 0444, ipl_vm_parm_show, NULL); 350 351 static ssize_t sys_ipl_device_show(struct kobject *kobj, 352 struct kobj_attribute *attr, char *page) 353 { 354 switch (ipl_info.type) { 355 case IPL_TYPE_CCW: 356 return sprintf(page, "0.%x.%04x\n", ipl_block.ccw.ssid, 357 ipl_block.ccw.devno); 358 case IPL_TYPE_ECKD: 359 case IPL_TYPE_ECKD_DUMP: 360 return sprintf(page, "0.%x.%04x\n", ipl_block.eckd.ssid, 361 ipl_block.eckd.devno); 362 case IPL_TYPE_FCP: 363 case IPL_TYPE_FCP_DUMP: 364 return sprintf(page, "0.0.%04x\n", ipl_block.fcp.devno); 365 case IPL_TYPE_NVME: 366 case IPL_TYPE_NVME_DUMP: 367 return sprintf(page, "%08ux\n", ipl_block.nvme.fid); 368 default: 369 return 0; 370 } 371 } 372 373 static struct kobj_attribute sys_ipl_device_attr = 374 __ATTR(device, 0444, sys_ipl_device_show, NULL); 375 376 static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj, 377 struct bin_attribute *attr, char *buf, 378 loff_t off, size_t count) 379 { 380 return memory_read_from_buffer(buf, count, &off, &ipl_block, 381 ipl_block.hdr.len); 382 } 383 static struct bin_attribute ipl_parameter_attr = 384 __BIN_ATTR(binary_parameter, 0444, ipl_parameter_read, NULL, 385 PAGE_SIZE); 386 387 static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj, 388 struct bin_attribute *attr, char *buf, 389 loff_t off, size_t count) 390 { 391 unsigned int size = ipl_block.fcp.scp_data_len; 392 void *scp_data = &ipl_block.fcp.scp_data; 393 394 return memory_read_from_buffer(buf, count, &off, scp_data, size); 395 } 396 397 static ssize_t ipl_nvme_scp_data_read(struct file *filp, struct kobject *kobj, 398 struct bin_attribute *attr, char *buf, 399 loff_t off, size_t count) 400 { 401 unsigned int size = ipl_block.nvme.scp_data_len; 402 void *scp_data = &ipl_block.nvme.scp_data; 403 404 return memory_read_from_buffer(buf, count, &off, scp_data, size); 405 } 406 407 static ssize_t ipl_eckd_scp_data_read(struct file *filp, struct kobject *kobj, 408 struct bin_attribute *attr, char *buf, 409 loff_t off, size_t count) 410 { 411 unsigned int size = ipl_block.eckd.scp_data_len; 412 void *scp_data = &ipl_block.eckd.scp_data; 413 414 return memory_read_from_buffer(buf, count, &off, scp_data, size); 415 } 416 417 static struct bin_attribute ipl_scp_data_attr = 418 __BIN_ATTR(scp_data, 0444, ipl_scp_data_read, NULL, PAGE_SIZE); 419 420 static struct bin_attribute ipl_nvme_scp_data_attr = 421 __BIN_ATTR(scp_data, 0444, ipl_nvme_scp_data_read, NULL, PAGE_SIZE); 422 423 static struct bin_attribute ipl_eckd_scp_data_attr = 424 __BIN_ATTR(scp_data, 0444, ipl_eckd_scp_data_read, NULL, PAGE_SIZE); 425 426 static struct bin_attribute *ipl_fcp_bin_attrs[] = { 427 &ipl_parameter_attr, 428 &ipl_scp_data_attr, 429 NULL, 430 }; 431 432 static struct bin_attribute *ipl_nvme_bin_attrs[] = { 433 &ipl_parameter_attr, 434 &ipl_nvme_scp_data_attr, 435 NULL, 436 }; 437 438 static struct bin_attribute *ipl_eckd_bin_attrs[] = { 439 &ipl_parameter_attr, 440 &ipl_eckd_scp_data_attr, 441 NULL, 442 }; 443 444 /* FCP ipl device attributes */ 445 446 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", 447 (unsigned long long)ipl_block.fcp.wwpn); 448 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", 449 (unsigned long long)ipl_block.fcp.lun); 450 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", 451 (unsigned long long)ipl_block.fcp.bootprog); 452 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", 453 (unsigned long long)ipl_block.fcp.br_lba); 454 455 /* NVMe ipl device attributes */ 456 DEFINE_IPL_ATTR_RO(ipl_nvme, fid, "0x%08llx\n", 457 (unsigned long long)ipl_block.nvme.fid); 458 DEFINE_IPL_ATTR_RO(ipl_nvme, nsid, "0x%08llx\n", 459 (unsigned long long)ipl_block.nvme.nsid); 460 DEFINE_IPL_ATTR_RO(ipl_nvme, bootprog, "%lld\n", 461 (unsigned long long)ipl_block.nvme.bootprog); 462 DEFINE_IPL_ATTR_RO(ipl_nvme, br_lba, "%lld\n", 463 (unsigned long long)ipl_block.nvme.br_lba); 464 465 /* ECKD ipl device attributes */ 466 DEFINE_IPL_ATTR_RO(ipl_eckd, bootprog, "%lld\n", 467 (unsigned long long)ipl_block.eckd.bootprog); 468 469 #define IPL_ATTR_BR_CHR_SHOW_FN(_name, _ipb) \ 470 static ssize_t eckd_##_name##_br_chr_show(struct kobject *kobj, \ 471 struct kobj_attribute *attr, \ 472 char *buf) \ 473 { \ 474 struct ipl_pb0_eckd *ipb = &(_ipb); \ 475 \ 476 if (!ipb->br_chr.cyl && \ 477 !ipb->br_chr.head && \ 478 !ipb->br_chr.record) \ 479 return sprintf(buf, "auto\n"); \ 480 \ 481 return sprintf(buf, "0x%x,0x%x,0x%x\n", \ 482 ipb->br_chr.cyl, \ 483 ipb->br_chr.head, \ 484 ipb->br_chr.record); \ 485 } 486 487 #define IPL_ATTR_BR_CHR_STORE_FN(_name, _ipb) \ 488 static ssize_t eckd_##_name##_br_chr_store(struct kobject *kobj, \ 489 struct kobj_attribute *attr, \ 490 const char *buf, size_t len) \ 491 { \ 492 struct ipl_pb0_eckd *ipb = &(_ipb); \ 493 unsigned long args[3] = { 0 }; \ 494 char *p, *p1, *tmp = NULL; \ 495 int i, rc; \ 496 \ 497 if (!strncmp(buf, "auto", 4)) \ 498 goto out; \ 499 \ 500 tmp = kstrdup(buf, GFP_KERNEL); \ 501 p = tmp; \ 502 for (i = 0; i < 3; i++) { \ 503 p1 = strsep(&p, ", "); \ 504 if (!p1) { \ 505 rc = -EINVAL; \ 506 goto err; \ 507 } \ 508 rc = kstrtoul(p1, 0, args + i); \ 509 if (rc) \ 510 goto err; \ 511 } \ 512 \ 513 rc = -EINVAL; \ 514 if (i != 3) \ 515 goto err; \ 516 \ 517 if ((args[0] || args[1]) && !args[2]) \ 518 goto err; \ 519 \ 520 if (args[0] > UINT_MAX || args[1] > 255 || args[2] > 255) \ 521 goto err; \ 522 \ 523 out: \ 524 ipb->br_chr.cyl = args[0]; \ 525 ipb->br_chr.head = args[1]; \ 526 ipb->br_chr.record = args[2]; \ 527 rc = len; \ 528 err: \ 529 kfree(tmp); \ 530 return rc; \ 531 } 532 533 IPL_ATTR_BR_CHR_SHOW_FN(ipl, ipl_block.eckd); 534 static struct kobj_attribute sys_ipl_eckd_br_chr_attr = 535 __ATTR(br_chr, 0644, eckd_ipl_br_chr_show, NULL); 536 537 IPL_ATTR_BR_CHR_SHOW_FN(reipl, reipl_block_eckd->eckd); 538 IPL_ATTR_BR_CHR_STORE_FN(reipl, reipl_block_eckd->eckd); 539 540 static struct kobj_attribute sys_reipl_eckd_br_chr_attr = 541 __ATTR(br_chr, 0644, eckd_reipl_br_chr_show, eckd_reipl_br_chr_store); 542 543 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj, 544 struct kobj_attribute *attr, char *page) 545 { 546 char loadparm[LOADPARM_LEN + 1] = {}; 547 548 if (!sclp_ipl_info.is_valid) 549 return sprintf(page, "#unknown#\n"); 550 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN); 551 EBCASC(loadparm, LOADPARM_LEN); 552 strim(loadparm); 553 return sprintf(page, "%s\n", loadparm); 554 } 555 556 static struct kobj_attribute sys_ipl_ccw_loadparm_attr = 557 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL); 558 559 static struct attribute *ipl_fcp_attrs[] = { 560 &sys_ipl_type_attr.attr, 561 &sys_ipl_device_attr.attr, 562 &sys_ipl_fcp_wwpn_attr.attr, 563 &sys_ipl_fcp_lun_attr.attr, 564 &sys_ipl_fcp_bootprog_attr.attr, 565 &sys_ipl_fcp_br_lba_attr.attr, 566 &sys_ipl_ccw_loadparm_attr.attr, 567 &sys_ipl_secure_attr.attr, 568 &sys_ipl_has_secure_attr.attr, 569 NULL, 570 }; 571 572 static struct attribute_group ipl_fcp_attr_group = { 573 .attrs = ipl_fcp_attrs, 574 .bin_attrs = ipl_fcp_bin_attrs, 575 }; 576 577 static struct attribute *ipl_nvme_attrs[] = { 578 &sys_ipl_type_attr.attr, 579 &sys_ipl_nvme_fid_attr.attr, 580 &sys_ipl_nvme_nsid_attr.attr, 581 &sys_ipl_nvme_bootprog_attr.attr, 582 &sys_ipl_nvme_br_lba_attr.attr, 583 &sys_ipl_ccw_loadparm_attr.attr, 584 &sys_ipl_secure_attr.attr, 585 &sys_ipl_has_secure_attr.attr, 586 NULL, 587 }; 588 589 static struct attribute_group ipl_nvme_attr_group = { 590 .attrs = ipl_nvme_attrs, 591 .bin_attrs = ipl_nvme_bin_attrs, 592 }; 593 594 static struct attribute *ipl_eckd_attrs[] = { 595 &sys_ipl_type_attr.attr, 596 &sys_ipl_eckd_bootprog_attr.attr, 597 &sys_ipl_eckd_br_chr_attr.attr, 598 &sys_ipl_ccw_loadparm_attr.attr, 599 &sys_ipl_device_attr.attr, 600 &sys_ipl_secure_attr.attr, 601 &sys_ipl_has_secure_attr.attr, 602 NULL, 603 }; 604 605 static struct attribute_group ipl_eckd_attr_group = { 606 .attrs = ipl_eckd_attrs, 607 .bin_attrs = ipl_eckd_bin_attrs, 608 }; 609 610 /* CCW ipl device attributes */ 611 612 static struct attribute *ipl_ccw_attrs_vm[] = { 613 &sys_ipl_type_attr.attr, 614 &sys_ipl_device_attr.attr, 615 &sys_ipl_ccw_loadparm_attr.attr, 616 &sys_ipl_vm_parm_attr.attr, 617 &sys_ipl_secure_attr.attr, 618 &sys_ipl_has_secure_attr.attr, 619 NULL, 620 }; 621 622 static struct attribute *ipl_ccw_attrs_lpar[] = { 623 &sys_ipl_type_attr.attr, 624 &sys_ipl_device_attr.attr, 625 &sys_ipl_ccw_loadparm_attr.attr, 626 &sys_ipl_secure_attr.attr, 627 &sys_ipl_has_secure_attr.attr, 628 NULL, 629 }; 630 631 static struct attribute_group ipl_ccw_attr_group_vm = { 632 .attrs = ipl_ccw_attrs_vm, 633 }; 634 635 static struct attribute_group ipl_ccw_attr_group_lpar = { 636 .attrs = ipl_ccw_attrs_lpar 637 }; 638 639 /* UNKNOWN ipl device attributes */ 640 641 static struct attribute *ipl_unknown_attrs[] = { 642 &sys_ipl_type_attr.attr, 643 NULL, 644 }; 645 646 static struct attribute_group ipl_unknown_attr_group = { 647 .attrs = ipl_unknown_attrs, 648 }; 649 650 static struct kset *ipl_kset; 651 652 static void __ipl_run(void *unused) 653 { 654 diag308(DIAG308_LOAD_CLEAR, NULL); 655 } 656 657 static void ipl_run(struct shutdown_trigger *trigger) 658 { 659 smp_call_ipl_cpu(__ipl_run, NULL); 660 } 661 662 static int __init ipl_init(void) 663 { 664 int rc; 665 666 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj); 667 if (!ipl_kset) { 668 rc = -ENOMEM; 669 goto out; 670 } 671 switch (ipl_info.type) { 672 case IPL_TYPE_CCW: 673 if (MACHINE_IS_VM) 674 rc = sysfs_create_group(&ipl_kset->kobj, 675 &ipl_ccw_attr_group_vm); 676 else 677 rc = sysfs_create_group(&ipl_kset->kobj, 678 &ipl_ccw_attr_group_lpar); 679 break; 680 case IPL_TYPE_ECKD: 681 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_eckd_attr_group); 682 break; 683 case IPL_TYPE_FCP: 684 case IPL_TYPE_FCP_DUMP: 685 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group); 686 break; 687 case IPL_TYPE_NVME: 688 case IPL_TYPE_NVME_DUMP: 689 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nvme_attr_group); 690 break; 691 default: 692 rc = sysfs_create_group(&ipl_kset->kobj, 693 &ipl_unknown_attr_group); 694 break; 695 } 696 out: 697 if (rc) 698 panic("ipl_init failed: rc = %i\n", rc); 699 700 return 0; 701 } 702 703 static struct shutdown_action __refdata ipl_action = { 704 .name = SHUTDOWN_ACTION_IPL_STR, 705 .fn = ipl_run, 706 .init = ipl_init, 707 }; 708 709 /* 710 * reipl shutdown action: Reboot Linux on shutdown. 711 */ 712 713 /* VM IPL PARM attributes */ 714 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb, 715 char *page) 716 { 717 char vmparm[DIAG308_VMPARM_SIZE + 1] = {}; 718 719 ipl_block_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb); 720 return sprintf(page, "%s\n", vmparm); 721 } 722 723 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb, 724 size_t vmparm_max, 725 const char *buf, size_t len) 726 { 727 int i, ip_len; 728 729 /* ignore trailing newline */ 730 ip_len = len; 731 if ((len > 0) && (buf[len - 1] == '\n')) 732 ip_len--; 733 734 if (ip_len > vmparm_max) 735 return -EINVAL; 736 737 /* parm is used to store kernel options, check for common chars */ 738 for (i = 0; i < ip_len; i++) 739 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i]))) 740 return -EINVAL; 741 742 memset(ipb->ccw.vm_parm, 0, DIAG308_VMPARM_SIZE); 743 ipb->ccw.vm_parm_len = ip_len; 744 if (ip_len > 0) { 745 ipb->ccw.vm_flags |= IPL_PB0_CCW_VM_FLAG_VP; 746 memcpy(ipb->ccw.vm_parm, buf, ip_len); 747 ASCEBC(ipb->ccw.vm_parm, ip_len); 748 } else { 749 ipb->ccw.vm_flags &= ~IPL_PB0_CCW_VM_FLAG_VP; 750 } 751 752 return len; 753 } 754 755 /* NSS wrapper */ 756 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj, 757 struct kobj_attribute *attr, char *page) 758 { 759 return reipl_generic_vmparm_show(reipl_block_nss, page); 760 } 761 762 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj, 763 struct kobj_attribute *attr, 764 const char *buf, size_t len) 765 { 766 return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len); 767 } 768 769 /* CCW wrapper */ 770 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj, 771 struct kobj_attribute *attr, char *page) 772 { 773 return reipl_generic_vmparm_show(reipl_block_ccw, page); 774 } 775 776 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj, 777 struct kobj_attribute *attr, 778 const char *buf, size_t len) 779 { 780 return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len); 781 } 782 783 static struct kobj_attribute sys_reipl_nss_vmparm_attr = 784 __ATTR(parm, 0644, reipl_nss_vmparm_show, 785 reipl_nss_vmparm_store); 786 static struct kobj_attribute sys_reipl_ccw_vmparm_attr = 787 __ATTR(parm, 0644, reipl_ccw_vmparm_show, 788 reipl_ccw_vmparm_store); 789 790 /* FCP reipl device attributes */ 791 792 static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj, 793 struct bin_attribute *attr, 794 char *buf, loff_t off, size_t count) 795 { 796 size_t size = reipl_block_fcp->fcp.scp_data_len; 797 void *scp_data = reipl_block_fcp->fcp.scp_data; 798 799 return memory_read_from_buffer(buf, count, &off, scp_data, size); 800 } 801 802 static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj, 803 struct bin_attribute *attr, 804 char *buf, loff_t off, size_t count) 805 { 806 size_t scpdata_len = count; 807 size_t padding; 808 809 810 if (off) 811 return -EINVAL; 812 813 memcpy(reipl_block_fcp->fcp.scp_data, buf, count); 814 if (scpdata_len % 8) { 815 padding = 8 - (scpdata_len % 8); 816 memset(reipl_block_fcp->fcp.scp_data + scpdata_len, 817 0, padding); 818 scpdata_len += padding; 819 } 820 821 reipl_block_fcp->hdr.len = IPL_BP_FCP_LEN + scpdata_len; 822 reipl_block_fcp->fcp.len = IPL_BP0_FCP_LEN + scpdata_len; 823 reipl_block_fcp->fcp.scp_data_len = scpdata_len; 824 825 return count; 826 } 827 static struct bin_attribute sys_reipl_fcp_scp_data_attr = 828 __BIN_ATTR(scp_data, 0644, reipl_fcp_scpdata_read, 829 reipl_fcp_scpdata_write, DIAG308_SCPDATA_SIZE); 830 831 static struct bin_attribute *reipl_fcp_bin_attrs[] = { 832 &sys_reipl_fcp_scp_data_attr, 833 NULL, 834 }; 835 836 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n", 837 reipl_block_fcp->fcp.wwpn); 838 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n", 839 reipl_block_fcp->fcp.lun); 840 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n", 841 reipl_block_fcp->fcp.bootprog); 842 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n", 843 reipl_block_fcp->fcp.br_lba); 844 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n", 845 reipl_block_fcp->fcp.devno); 846 847 static void reipl_get_ascii_loadparm(char *loadparm, 848 struct ipl_parameter_block *ibp) 849 { 850 memcpy(loadparm, ibp->common.loadparm, LOADPARM_LEN); 851 EBCASC(loadparm, LOADPARM_LEN); 852 loadparm[LOADPARM_LEN] = 0; 853 strim(loadparm); 854 } 855 856 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb, 857 char *page) 858 { 859 char buf[LOADPARM_LEN + 1]; 860 861 reipl_get_ascii_loadparm(buf, ipb); 862 return sprintf(page, "%s\n", buf); 863 } 864 865 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb, 866 const char *buf, size_t len) 867 { 868 int i, lp_len; 869 870 /* ignore trailing newline */ 871 lp_len = len; 872 if ((len > 0) && (buf[len - 1] == '\n')) 873 lp_len--; 874 /* loadparm can have max 8 characters and must not start with a blank */ 875 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' '))) 876 return -EINVAL; 877 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */ 878 for (i = 0; i < lp_len; i++) { 879 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') || 880 (buf[i] == '.')) 881 continue; 882 return -EINVAL; 883 } 884 /* initialize loadparm with blanks */ 885 memset(ipb->common.loadparm, ' ', LOADPARM_LEN); 886 /* copy and convert to ebcdic */ 887 memcpy(ipb->common.loadparm, buf, lp_len); 888 ASCEBC(ipb->common.loadparm, LOADPARM_LEN); 889 ipb->common.flags |= IPL_PB0_FLAG_LOADPARM; 890 return len; 891 } 892 893 #define DEFINE_GENERIC_LOADPARM(name) \ 894 static ssize_t reipl_##name##_loadparm_show(struct kobject *kobj, \ 895 struct kobj_attribute *attr, char *page) \ 896 { \ 897 return reipl_generic_loadparm_show(reipl_block_##name, page); \ 898 } \ 899 static ssize_t reipl_##name##_loadparm_store(struct kobject *kobj, \ 900 struct kobj_attribute *attr, \ 901 const char *buf, size_t len) \ 902 { \ 903 return reipl_generic_loadparm_store(reipl_block_##name, buf, len); \ 904 } \ 905 static struct kobj_attribute sys_reipl_##name##_loadparm_attr = \ 906 __ATTR(loadparm, 0644, reipl_##name##_loadparm_show, \ 907 reipl_##name##_loadparm_store) 908 909 DEFINE_GENERIC_LOADPARM(fcp); 910 DEFINE_GENERIC_LOADPARM(nvme); 911 DEFINE_GENERIC_LOADPARM(ccw); 912 DEFINE_GENERIC_LOADPARM(nss); 913 DEFINE_GENERIC_LOADPARM(eckd); 914 915 static ssize_t reipl_fcp_clear_show(struct kobject *kobj, 916 struct kobj_attribute *attr, char *page) 917 { 918 return sprintf(page, "%u\n", reipl_fcp_clear); 919 } 920 921 static ssize_t reipl_fcp_clear_store(struct kobject *kobj, 922 struct kobj_attribute *attr, 923 const char *buf, size_t len) 924 { 925 if (kstrtobool(buf, &reipl_fcp_clear) < 0) 926 return -EINVAL; 927 return len; 928 } 929 930 static struct attribute *reipl_fcp_attrs[] = { 931 &sys_reipl_fcp_device_attr.attr, 932 &sys_reipl_fcp_wwpn_attr.attr, 933 &sys_reipl_fcp_lun_attr.attr, 934 &sys_reipl_fcp_bootprog_attr.attr, 935 &sys_reipl_fcp_br_lba_attr.attr, 936 &sys_reipl_fcp_loadparm_attr.attr, 937 NULL, 938 }; 939 940 static struct attribute_group reipl_fcp_attr_group = { 941 .attrs = reipl_fcp_attrs, 942 .bin_attrs = reipl_fcp_bin_attrs, 943 }; 944 945 static struct kobj_attribute sys_reipl_fcp_clear_attr = 946 __ATTR(clear, 0644, reipl_fcp_clear_show, reipl_fcp_clear_store); 947 948 /* NVME reipl device attributes */ 949 950 static ssize_t reipl_nvme_scpdata_read(struct file *filp, struct kobject *kobj, 951 struct bin_attribute *attr, 952 char *buf, loff_t off, size_t count) 953 { 954 size_t size = reipl_block_nvme->nvme.scp_data_len; 955 void *scp_data = reipl_block_nvme->nvme.scp_data; 956 957 return memory_read_from_buffer(buf, count, &off, scp_data, size); 958 } 959 960 static ssize_t reipl_nvme_scpdata_write(struct file *filp, struct kobject *kobj, 961 struct bin_attribute *attr, 962 char *buf, loff_t off, size_t count) 963 { 964 size_t scpdata_len = count; 965 size_t padding; 966 967 if (off) 968 return -EINVAL; 969 970 memcpy(reipl_block_nvme->nvme.scp_data, buf, count); 971 if (scpdata_len % 8) { 972 padding = 8 - (scpdata_len % 8); 973 memset(reipl_block_nvme->nvme.scp_data + scpdata_len, 974 0, padding); 975 scpdata_len += padding; 976 } 977 978 reipl_block_nvme->hdr.len = IPL_BP_FCP_LEN + scpdata_len; 979 reipl_block_nvme->nvme.len = IPL_BP0_FCP_LEN + scpdata_len; 980 reipl_block_nvme->nvme.scp_data_len = scpdata_len; 981 982 return count; 983 } 984 985 static struct bin_attribute sys_reipl_nvme_scp_data_attr = 986 __BIN_ATTR(scp_data, 0644, reipl_nvme_scpdata_read, 987 reipl_nvme_scpdata_write, DIAG308_SCPDATA_SIZE); 988 989 static struct bin_attribute *reipl_nvme_bin_attrs[] = { 990 &sys_reipl_nvme_scp_data_attr, 991 NULL, 992 }; 993 994 DEFINE_IPL_ATTR_RW(reipl_nvme, fid, "0x%08llx\n", "%llx\n", 995 reipl_block_nvme->nvme.fid); 996 DEFINE_IPL_ATTR_RW(reipl_nvme, nsid, "0x%08llx\n", "%llx\n", 997 reipl_block_nvme->nvme.nsid); 998 DEFINE_IPL_ATTR_RW(reipl_nvme, bootprog, "%lld\n", "%lld\n", 999 reipl_block_nvme->nvme.bootprog); 1000 DEFINE_IPL_ATTR_RW(reipl_nvme, br_lba, "%lld\n", "%lld\n", 1001 reipl_block_nvme->nvme.br_lba); 1002 1003 static struct attribute *reipl_nvme_attrs[] = { 1004 &sys_reipl_nvme_fid_attr.attr, 1005 &sys_reipl_nvme_nsid_attr.attr, 1006 &sys_reipl_nvme_bootprog_attr.attr, 1007 &sys_reipl_nvme_br_lba_attr.attr, 1008 &sys_reipl_nvme_loadparm_attr.attr, 1009 NULL, 1010 }; 1011 1012 static struct attribute_group reipl_nvme_attr_group = { 1013 .attrs = reipl_nvme_attrs, 1014 .bin_attrs = reipl_nvme_bin_attrs 1015 }; 1016 1017 static ssize_t reipl_nvme_clear_show(struct kobject *kobj, 1018 struct kobj_attribute *attr, char *page) 1019 { 1020 return sprintf(page, "%u\n", reipl_nvme_clear); 1021 } 1022 1023 static ssize_t reipl_nvme_clear_store(struct kobject *kobj, 1024 struct kobj_attribute *attr, 1025 const char *buf, size_t len) 1026 { 1027 if (kstrtobool(buf, &reipl_nvme_clear) < 0) 1028 return -EINVAL; 1029 return len; 1030 } 1031 1032 static struct kobj_attribute sys_reipl_nvme_clear_attr = 1033 __ATTR(clear, 0644, reipl_nvme_clear_show, reipl_nvme_clear_store); 1034 1035 /* CCW reipl device attributes */ 1036 DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ccw); 1037 1038 static ssize_t reipl_ccw_clear_show(struct kobject *kobj, 1039 struct kobj_attribute *attr, char *page) 1040 { 1041 return sprintf(page, "%u\n", reipl_ccw_clear); 1042 } 1043 1044 static ssize_t reipl_ccw_clear_store(struct kobject *kobj, 1045 struct kobj_attribute *attr, 1046 const char *buf, size_t len) 1047 { 1048 if (kstrtobool(buf, &reipl_ccw_clear) < 0) 1049 return -EINVAL; 1050 return len; 1051 } 1052 1053 static struct kobj_attribute sys_reipl_ccw_clear_attr = 1054 __ATTR(clear, 0644, reipl_ccw_clear_show, reipl_ccw_clear_store); 1055 1056 static struct attribute *reipl_ccw_attrs_vm[] = { 1057 &sys_reipl_ccw_device_attr.attr, 1058 &sys_reipl_ccw_loadparm_attr.attr, 1059 &sys_reipl_ccw_vmparm_attr.attr, 1060 &sys_reipl_ccw_clear_attr.attr, 1061 NULL, 1062 }; 1063 1064 static struct attribute *reipl_ccw_attrs_lpar[] = { 1065 &sys_reipl_ccw_device_attr.attr, 1066 &sys_reipl_ccw_loadparm_attr.attr, 1067 &sys_reipl_ccw_clear_attr.attr, 1068 NULL, 1069 }; 1070 1071 static struct attribute_group reipl_ccw_attr_group_vm = { 1072 .name = IPL_CCW_STR, 1073 .attrs = reipl_ccw_attrs_vm, 1074 }; 1075 1076 static struct attribute_group reipl_ccw_attr_group_lpar = { 1077 .name = IPL_CCW_STR, 1078 .attrs = reipl_ccw_attrs_lpar, 1079 }; 1080 1081 /* ECKD reipl device attributes */ 1082 1083 static ssize_t reipl_eckd_scpdata_read(struct file *filp, struct kobject *kobj, 1084 struct bin_attribute *attr, 1085 char *buf, loff_t off, size_t count) 1086 { 1087 size_t size = reipl_block_eckd->eckd.scp_data_len; 1088 void *scp_data = reipl_block_eckd->eckd.scp_data; 1089 1090 return memory_read_from_buffer(buf, count, &off, scp_data, size); 1091 } 1092 1093 static ssize_t reipl_eckd_scpdata_write(struct file *filp, struct kobject *kobj, 1094 struct bin_attribute *attr, 1095 char *buf, loff_t off, size_t count) 1096 { 1097 size_t scpdata_len = count; 1098 size_t padding; 1099 1100 if (off) 1101 return -EINVAL; 1102 1103 memcpy(reipl_block_eckd->eckd.scp_data, buf, count); 1104 if (scpdata_len % 8) { 1105 padding = 8 - (scpdata_len % 8); 1106 memset(reipl_block_eckd->eckd.scp_data + scpdata_len, 1107 0, padding); 1108 scpdata_len += padding; 1109 } 1110 1111 reipl_block_eckd->hdr.len = IPL_BP_ECKD_LEN + scpdata_len; 1112 reipl_block_eckd->eckd.len = IPL_BP0_ECKD_LEN + scpdata_len; 1113 reipl_block_eckd->eckd.scp_data_len = scpdata_len; 1114 1115 return count; 1116 } 1117 1118 static struct bin_attribute sys_reipl_eckd_scp_data_attr = 1119 __BIN_ATTR(scp_data, 0644, reipl_eckd_scpdata_read, 1120 reipl_eckd_scpdata_write, DIAG308_SCPDATA_SIZE); 1121 1122 static struct bin_attribute *reipl_eckd_bin_attrs[] = { 1123 &sys_reipl_eckd_scp_data_attr, 1124 NULL, 1125 }; 1126 1127 DEFINE_IPL_CCW_ATTR_RW(reipl_eckd, device, reipl_block_eckd->eckd); 1128 DEFINE_IPL_ATTR_RW(reipl_eckd, bootprog, "%lld\n", "%lld\n", 1129 reipl_block_eckd->eckd.bootprog); 1130 1131 static struct attribute *reipl_eckd_attrs[] = { 1132 &sys_reipl_eckd_device_attr.attr, 1133 &sys_reipl_eckd_bootprog_attr.attr, 1134 &sys_reipl_eckd_br_chr_attr.attr, 1135 &sys_reipl_eckd_loadparm_attr.attr, 1136 NULL, 1137 }; 1138 1139 static struct attribute_group reipl_eckd_attr_group = { 1140 .attrs = reipl_eckd_attrs, 1141 .bin_attrs = reipl_eckd_bin_attrs 1142 }; 1143 1144 static ssize_t reipl_eckd_clear_show(struct kobject *kobj, 1145 struct kobj_attribute *attr, char *page) 1146 { 1147 return sprintf(page, "%u\n", reipl_eckd_clear); 1148 } 1149 1150 static ssize_t reipl_eckd_clear_store(struct kobject *kobj, 1151 struct kobj_attribute *attr, 1152 const char *buf, size_t len) 1153 { 1154 if (kstrtobool(buf, &reipl_eckd_clear) < 0) 1155 return -EINVAL; 1156 return len; 1157 } 1158 1159 static struct kobj_attribute sys_reipl_eckd_clear_attr = 1160 __ATTR(clear, 0644, reipl_eckd_clear_show, reipl_eckd_clear_store); 1161 1162 /* NSS reipl device attributes */ 1163 static void reipl_get_ascii_nss_name(char *dst, 1164 struct ipl_parameter_block *ipb) 1165 { 1166 memcpy(dst, ipb->ccw.nss_name, NSS_NAME_SIZE); 1167 EBCASC(dst, NSS_NAME_SIZE); 1168 dst[NSS_NAME_SIZE] = 0; 1169 } 1170 1171 static ssize_t reipl_nss_name_show(struct kobject *kobj, 1172 struct kobj_attribute *attr, char *page) 1173 { 1174 char nss_name[NSS_NAME_SIZE + 1] = {}; 1175 1176 reipl_get_ascii_nss_name(nss_name, reipl_block_nss); 1177 return sprintf(page, "%s\n", nss_name); 1178 } 1179 1180 static ssize_t reipl_nss_name_store(struct kobject *kobj, 1181 struct kobj_attribute *attr, 1182 const char *buf, size_t len) 1183 { 1184 int nss_len; 1185 1186 /* ignore trailing newline */ 1187 nss_len = len; 1188 if ((len > 0) && (buf[len - 1] == '\n')) 1189 nss_len--; 1190 1191 if (nss_len > NSS_NAME_SIZE) 1192 return -EINVAL; 1193 1194 memset(reipl_block_nss->ccw.nss_name, 0x40, NSS_NAME_SIZE); 1195 if (nss_len > 0) { 1196 reipl_block_nss->ccw.vm_flags |= IPL_PB0_CCW_VM_FLAG_NSS; 1197 memcpy(reipl_block_nss->ccw.nss_name, buf, nss_len); 1198 ASCEBC(reipl_block_nss->ccw.nss_name, nss_len); 1199 EBC_TOUPPER(reipl_block_nss->ccw.nss_name, nss_len); 1200 } else { 1201 reipl_block_nss->ccw.vm_flags &= ~IPL_PB0_CCW_VM_FLAG_NSS; 1202 } 1203 1204 return len; 1205 } 1206 1207 static struct kobj_attribute sys_reipl_nss_name_attr = 1208 __ATTR(name, 0644, reipl_nss_name_show, 1209 reipl_nss_name_store); 1210 1211 static struct attribute *reipl_nss_attrs[] = { 1212 &sys_reipl_nss_name_attr.attr, 1213 &sys_reipl_nss_loadparm_attr.attr, 1214 &sys_reipl_nss_vmparm_attr.attr, 1215 NULL, 1216 }; 1217 1218 static struct attribute_group reipl_nss_attr_group = { 1219 .name = IPL_NSS_STR, 1220 .attrs = reipl_nss_attrs, 1221 }; 1222 1223 void set_os_info_reipl_block(void) 1224 { 1225 os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual, 1226 reipl_block_actual->hdr.len); 1227 } 1228 1229 /* reipl type */ 1230 1231 static int reipl_set_type(enum ipl_type type) 1232 { 1233 if (!(reipl_capabilities & type)) 1234 return -EINVAL; 1235 1236 switch(type) { 1237 case IPL_TYPE_CCW: 1238 reipl_block_actual = reipl_block_ccw; 1239 break; 1240 case IPL_TYPE_ECKD: 1241 reipl_block_actual = reipl_block_eckd; 1242 break; 1243 case IPL_TYPE_FCP: 1244 reipl_block_actual = reipl_block_fcp; 1245 break; 1246 case IPL_TYPE_NVME: 1247 reipl_block_actual = reipl_block_nvme; 1248 break; 1249 case IPL_TYPE_NSS: 1250 reipl_block_actual = reipl_block_nss; 1251 break; 1252 default: 1253 break; 1254 } 1255 reipl_type = type; 1256 return 0; 1257 } 1258 1259 static ssize_t reipl_type_show(struct kobject *kobj, 1260 struct kobj_attribute *attr, char *page) 1261 { 1262 return sprintf(page, "%s\n", ipl_type_str(reipl_type)); 1263 } 1264 1265 static ssize_t reipl_type_store(struct kobject *kobj, 1266 struct kobj_attribute *attr, 1267 const char *buf, size_t len) 1268 { 1269 int rc = -EINVAL; 1270 1271 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0) 1272 rc = reipl_set_type(IPL_TYPE_CCW); 1273 else if (strncmp(buf, IPL_ECKD_STR, strlen(IPL_ECKD_STR)) == 0) 1274 rc = reipl_set_type(IPL_TYPE_ECKD); 1275 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0) 1276 rc = reipl_set_type(IPL_TYPE_FCP); 1277 else if (strncmp(buf, IPL_NVME_STR, strlen(IPL_NVME_STR)) == 0) 1278 rc = reipl_set_type(IPL_TYPE_NVME); 1279 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0) 1280 rc = reipl_set_type(IPL_TYPE_NSS); 1281 return (rc != 0) ? rc : len; 1282 } 1283 1284 static struct kobj_attribute reipl_type_attr = 1285 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store); 1286 1287 static struct kset *reipl_kset; 1288 static struct kset *reipl_fcp_kset; 1289 static struct kset *reipl_nvme_kset; 1290 static struct kset *reipl_eckd_kset; 1291 1292 static void __reipl_run(void *unused) 1293 { 1294 switch (reipl_type) { 1295 case IPL_TYPE_CCW: 1296 diag308(DIAG308_SET, reipl_block_ccw); 1297 if (reipl_ccw_clear) 1298 diag308(DIAG308_LOAD_CLEAR, NULL); 1299 else 1300 diag308(DIAG308_LOAD_NORMAL_DUMP, NULL); 1301 break; 1302 case IPL_TYPE_ECKD: 1303 diag308(DIAG308_SET, reipl_block_eckd); 1304 if (reipl_eckd_clear) 1305 diag308(DIAG308_LOAD_CLEAR, NULL); 1306 else 1307 diag308(DIAG308_LOAD_NORMAL, NULL); 1308 break; 1309 case IPL_TYPE_FCP: 1310 diag308(DIAG308_SET, reipl_block_fcp); 1311 if (reipl_fcp_clear) 1312 diag308(DIAG308_LOAD_CLEAR, NULL); 1313 else 1314 diag308(DIAG308_LOAD_NORMAL, NULL); 1315 break; 1316 case IPL_TYPE_NVME: 1317 diag308(DIAG308_SET, reipl_block_nvme); 1318 if (reipl_nvme_clear) 1319 diag308(DIAG308_LOAD_CLEAR, NULL); 1320 else 1321 diag308(DIAG308_LOAD_NORMAL, NULL); 1322 break; 1323 case IPL_TYPE_NSS: 1324 diag308(DIAG308_SET, reipl_block_nss); 1325 diag308(DIAG308_LOAD_CLEAR, NULL); 1326 break; 1327 case IPL_TYPE_UNKNOWN: 1328 diag308(DIAG308_LOAD_CLEAR, NULL); 1329 break; 1330 case IPL_TYPE_FCP_DUMP: 1331 case IPL_TYPE_NVME_DUMP: 1332 case IPL_TYPE_ECKD_DUMP: 1333 break; 1334 } 1335 disabled_wait(); 1336 } 1337 1338 static void reipl_run(struct shutdown_trigger *trigger) 1339 { 1340 smp_call_ipl_cpu(__reipl_run, NULL); 1341 } 1342 1343 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb) 1344 { 1345 ipb->hdr.len = IPL_BP_CCW_LEN; 1346 ipb->hdr.version = IPL_PARM_BLOCK_VERSION; 1347 ipb->pb0_hdr.len = IPL_BP0_CCW_LEN; 1348 ipb->pb0_hdr.pbt = IPL_PBT_CCW; 1349 } 1350 1351 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb) 1352 { 1353 /* LOADPARM */ 1354 /* check if read scp info worked and set loadparm */ 1355 if (sclp_ipl_info.is_valid) 1356 memcpy(ipb->ccw.loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN); 1357 else 1358 /* read scp info failed: set empty loadparm (EBCDIC blanks) */ 1359 memset(ipb->ccw.loadparm, 0x40, LOADPARM_LEN); 1360 ipb->ccw.flags = IPL_PB0_FLAG_LOADPARM; 1361 1362 /* VM PARM */ 1363 if (MACHINE_IS_VM && ipl_block_valid && 1364 (ipl_block.ccw.vm_flags & IPL_PB0_CCW_VM_FLAG_VP)) { 1365 1366 ipb->ccw.vm_flags |= IPL_PB0_CCW_VM_FLAG_VP; 1367 ipb->ccw.vm_parm_len = ipl_block.ccw.vm_parm_len; 1368 memcpy(ipb->ccw.vm_parm, 1369 ipl_block.ccw.vm_parm, DIAG308_VMPARM_SIZE); 1370 } 1371 } 1372 1373 static int __init reipl_nss_init(void) 1374 { 1375 int rc; 1376 1377 if (!MACHINE_IS_VM) 1378 return 0; 1379 1380 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL); 1381 if (!reipl_block_nss) 1382 return -ENOMEM; 1383 1384 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group); 1385 if (rc) 1386 return rc; 1387 1388 reipl_block_ccw_init(reipl_block_nss); 1389 reipl_capabilities |= IPL_TYPE_NSS; 1390 return 0; 1391 } 1392 1393 static int __init reipl_ccw_init(void) 1394 { 1395 int rc; 1396 1397 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL); 1398 if (!reipl_block_ccw) 1399 return -ENOMEM; 1400 1401 rc = sysfs_create_group(&reipl_kset->kobj, 1402 MACHINE_IS_VM ? &reipl_ccw_attr_group_vm 1403 : &reipl_ccw_attr_group_lpar); 1404 if (rc) 1405 return rc; 1406 1407 reipl_block_ccw_init(reipl_block_ccw); 1408 if (ipl_info.type == IPL_TYPE_CCW) { 1409 reipl_block_ccw->ccw.ssid = ipl_block.ccw.ssid; 1410 reipl_block_ccw->ccw.devno = ipl_block.ccw.devno; 1411 reipl_block_ccw_fill_parms(reipl_block_ccw); 1412 } 1413 1414 reipl_capabilities |= IPL_TYPE_CCW; 1415 return 0; 1416 } 1417 1418 static int __init reipl_fcp_init(void) 1419 { 1420 int rc; 1421 1422 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL); 1423 if (!reipl_block_fcp) 1424 return -ENOMEM; 1425 1426 /* sysfs: create fcp kset for mixing attr group and bin attrs */ 1427 reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL, 1428 &reipl_kset->kobj); 1429 if (!reipl_fcp_kset) { 1430 free_page((unsigned long) reipl_block_fcp); 1431 return -ENOMEM; 1432 } 1433 1434 rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group); 1435 if (rc) 1436 goto out1; 1437 1438 if (test_facility(141)) { 1439 rc = sysfs_create_file(&reipl_fcp_kset->kobj, 1440 &sys_reipl_fcp_clear_attr.attr); 1441 if (rc) 1442 goto out2; 1443 } else { 1444 reipl_fcp_clear = true; 1445 } 1446 1447 if (ipl_info.type == IPL_TYPE_FCP) { 1448 memcpy(reipl_block_fcp, &ipl_block, sizeof(ipl_block)); 1449 /* 1450 * Fix loadparm: There are systems where the (SCSI) LOADPARM 1451 * is invalid in the SCSI IPL parameter block, so take it 1452 * always from sclp_ipl_info. 1453 */ 1454 memcpy(reipl_block_fcp->fcp.loadparm, sclp_ipl_info.loadparm, 1455 LOADPARM_LEN); 1456 } else { 1457 reipl_block_fcp->hdr.len = IPL_BP_FCP_LEN; 1458 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION; 1459 reipl_block_fcp->fcp.len = IPL_BP0_FCP_LEN; 1460 reipl_block_fcp->fcp.pbt = IPL_PBT_FCP; 1461 reipl_block_fcp->fcp.opt = IPL_PB0_FCP_OPT_IPL; 1462 } 1463 reipl_capabilities |= IPL_TYPE_FCP; 1464 return 0; 1465 1466 out2: 1467 sysfs_remove_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group); 1468 out1: 1469 kset_unregister(reipl_fcp_kset); 1470 free_page((unsigned long) reipl_block_fcp); 1471 return rc; 1472 } 1473 1474 static int __init reipl_nvme_init(void) 1475 { 1476 int rc; 1477 1478 reipl_block_nvme = (void *) get_zeroed_page(GFP_KERNEL); 1479 if (!reipl_block_nvme) 1480 return -ENOMEM; 1481 1482 /* sysfs: create kset for mixing attr group and bin attrs */ 1483 reipl_nvme_kset = kset_create_and_add(IPL_NVME_STR, NULL, 1484 &reipl_kset->kobj); 1485 if (!reipl_nvme_kset) { 1486 free_page((unsigned long) reipl_block_nvme); 1487 return -ENOMEM; 1488 } 1489 1490 rc = sysfs_create_group(&reipl_nvme_kset->kobj, &reipl_nvme_attr_group); 1491 if (rc) 1492 goto out1; 1493 1494 if (test_facility(141)) { 1495 rc = sysfs_create_file(&reipl_nvme_kset->kobj, 1496 &sys_reipl_nvme_clear_attr.attr); 1497 if (rc) 1498 goto out2; 1499 } else { 1500 reipl_nvme_clear = true; 1501 } 1502 1503 if (ipl_info.type == IPL_TYPE_NVME) { 1504 memcpy(reipl_block_nvme, &ipl_block, sizeof(ipl_block)); 1505 /* 1506 * Fix loadparm: There are systems where the (SCSI) LOADPARM 1507 * is invalid in the IPL parameter block, so take it 1508 * always from sclp_ipl_info. 1509 */ 1510 memcpy(reipl_block_nvme->nvme.loadparm, sclp_ipl_info.loadparm, 1511 LOADPARM_LEN); 1512 } else { 1513 reipl_block_nvme->hdr.len = IPL_BP_NVME_LEN; 1514 reipl_block_nvme->hdr.version = IPL_PARM_BLOCK_VERSION; 1515 reipl_block_nvme->nvme.len = IPL_BP0_NVME_LEN; 1516 reipl_block_nvme->nvme.pbt = IPL_PBT_NVME; 1517 reipl_block_nvme->nvme.opt = IPL_PB0_NVME_OPT_IPL; 1518 } 1519 reipl_capabilities |= IPL_TYPE_NVME; 1520 return 0; 1521 1522 out2: 1523 sysfs_remove_group(&reipl_nvme_kset->kobj, &reipl_nvme_attr_group); 1524 out1: 1525 kset_unregister(reipl_nvme_kset); 1526 free_page((unsigned long) reipl_block_nvme); 1527 return rc; 1528 } 1529 1530 static int __init reipl_eckd_init(void) 1531 { 1532 int rc; 1533 1534 if (!sclp.has_sipl_eckd) 1535 return 0; 1536 1537 reipl_block_eckd = (void *)get_zeroed_page(GFP_KERNEL); 1538 if (!reipl_block_eckd) 1539 return -ENOMEM; 1540 1541 /* sysfs: create kset for mixing attr group and bin attrs */ 1542 reipl_eckd_kset = kset_create_and_add(IPL_ECKD_STR, NULL, 1543 &reipl_kset->kobj); 1544 if (!reipl_eckd_kset) { 1545 free_page((unsigned long)reipl_block_eckd); 1546 return -ENOMEM; 1547 } 1548 1549 rc = sysfs_create_group(&reipl_eckd_kset->kobj, &reipl_eckd_attr_group); 1550 if (rc) 1551 goto out1; 1552 1553 if (test_facility(141)) { 1554 rc = sysfs_create_file(&reipl_eckd_kset->kobj, 1555 &sys_reipl_eckd_clear_attr.attr); 1556 if (rc) 1557 goto out2; 1558 } else { 1559 reipl_eckd_clear = true; 1560 } 1561 1562 if (ipl_info.type == IPL_TYPE_ECKD) { 1563 memcpy(reipl_block_eckd, &ipl_block, sizeof(ipl_block)); 1564 } else { 1565 reipl_block_eckd->hdr.len = IPL_BP_ECKD_LEN; 1566 reipl_block_eckd->hdr.version = IPL_PARM_BLOCK_VERSION; 1567 reipl_block_eckd->eckd.len = IPL_BP0_ECKD_LEN; 1568 reipl_block_eckd->eckd.pbt = IPL_PBT_ECKD; 1569 reipl_block_eckd->eckd.opt = IPL_PB0_ECKD_OPT_IPL; 1570 } 1571 reipl_capabilities |= IPL_TYPE_ECKD; 1572 return 0; 1573 1574 out2: 1575 sysfs_remove_group(&reipl_eckd_kset->kobj, &reipl_eckd_attr_group); 1576 out1: 1577 kset_unregister(reipl_eckd_kset); 1578 free_page((unsigned long)reipl_block_eckd); 1579 return rc; 1580 } 1581 1582 static int __init reipl_type_init(void) 1583 { 1584 enum ipl_type reipl_type = ipl_info.type; 1585 struct ipl_parameter_block *reipl_block; 1586 unsigned long size; 1587 1588 reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size); 1589 if (!reipl_block) 1590 goto out; 1591 /* 1592 * If we have an OS info reipl block, this will be used 1593 */ 1594 if (reipl_block->pb0_hdr.pbt == IPL_PBT_FCP) { 1595 memcpy(reipl_block_fcp, reipl_block, size); 1596 reipl_type = IPL_TYPE_FCP; 1597 } else if (reipl_block->pb0_hdr.pbt == IPL_PBT_NVME) { 1598 memcpy(reipl_block_nvme, reipl_block, size); 1599 reipl_type = IPL_TYPE_NVME; 1600 } else if (reipl_block->pb0_hdr.pbt == IPL_PBT_CCW) { 1601 memcpy(reipl_block_ccw, reipl_block, size); 1602 reipl_type = IPL_TYPE_CCW; 1603 } else if (reipl_block->pb0_hdr.pbt == IPL_PBT_ECKD) { 1604 memcpy(reipl_block_eckd, reipl_block, size); 1605 reipl_type = IPL_TYPE_ECKD; 1606 } 1607 out: 1608 return reipl_set_type(reipl_type); 1609 } 1610 1611 static int __init reipl_init(void) 1612 { 1613 int rc; 1614 1615 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj); 1616 if (!reipl_kset) 1617 return -ENOMEM; 1618 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr); 1619 if (rc) { 1620 kset_unregister(reipl_kset); 1621 return rc; 1622 } 1623 rc = reipl_ccw_init(); 1624 if (rc) 1625 return rc; 1626 rc = reipl_eckd_init(); 1627 if (rc) 1628 return rc; 1629 rc = reipl_fcp_init(); 1630 if (rc) 1631 return rc; 1632 rc = reipl_nvme_init(); 1633 if (rc) 1634 return rc; 1635 rc = reipl_nss_init(); 1636 if (rc) 1637 return rc; 1638 return reipl_type_init(); 1639 } 1640 1641 static struct shutdown_action __refdata reipl_action = { 1642 .name = SHUTDOWN_ACTION_REIPL_STR, 1643 .fn = reipl_run, 1644 .init = reipl_init, 1645 }; 1646 1647 /* 1648 * dump shutdown action: Dump Linux on shutdown. 1649 */ 1650 1651 /* FCP dump device attributes */ 1652 1653 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n", 1654 dump_block_fcp->fcp.wwpn); 1655 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n", 1656 dump_block_fcp->fcp.lun); 1657 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n", 1658 dump_block_fcp->fcp.bootprog); 1659 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n", 1660 dump_block_fcp->fcp.br_lba); 1661 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n", 1662 dump_block_fcp->fcp.devno); 1663 1664 static struct attribute *dump_fcp_attrs[] = { 1665 &sys_dump_fcp_device_attr.attr, 1666 &sys_dump_fcp_wwpn_attr.attr, 1667 &sys_dump_fcp_lun_attr.attr, 1668 &sys_dump_fcp_bootprog_attr.attr, 1669 &sys_dump_fcp_br_lba_attr.attr, 1670 NULL, 1671 }; 1672 1673 static struct attribute_group dump_fcp_attr_group = { 1674 .name = IPL_FCP_STR, 1675 .attrs = dump_fcp_attrs, 1676 }; 1677 1678 /* NVME dump device attributes */ 1679 DEFINE_IPL_ATTR_RW(dump_nvme, fid, "0x%08llx\n", "%llx\n", 1680 dump_block_nvme->nvme.fid); 1681 DEFINE_IPL_ATTR_RW(dump_nvme, nsid, "0x%08llx\n", "%llx\n", 1682 dump_block_nvme->nvme.nsid); 1683 DEFINE_IPL_ATTR_RW(dump_nvme, bootprog, "%lld\n", "%llx\n", 1684 dump_block_nvme->nvme.bootprog); 1685 DEFINE_IPL_ATTR_RW(dump_nvme, br_lba, "%lld\n", "%llx\n", 1686 dump_block_nvme->nvme.br_lba); 1687 1688 static struct attribute *dump_nvme_attrs[] = { 1689 &sys_dump_nvme_fid_attr.attr, 1690 &sys_dump_nvme_nsid_attr.attr, 1691 &sys_dump_nvme_bootprog_attr.attr, 1692 &sys_dump_nvme_br_lba_attr.attr, 1693 NULL, 1694 }; 1695 1696 static struct attribute_group dump_nvme_attr_group = { 1697 .name = IPL_NVME_STR, 1698 .attrs = dump_nvme_attrs, 1699 }; 1700 1701 /* ECKD dump device attributes */ 1702 DEFINE_IPL_CCW_ATTR_RW(dump_eckd, device, dump_block_eckd->eckd); 1703 DEFINE_IPL_ATTR_RW(dump_eckd, bootprog, "%lld\n", "%llx\n", 1704 dump_block_eckd->eckd.bootprog); 1705 1706 IPL_ATTR_BR_CHR_SHOW_FN(dump, dump_block_eckd->eckd); 1707 IPL_ATTR_BR_CHR_STORE_FN(dump, dump_block_eckd->eckd); 1708 1709 static struct kobj_attribute sys_dump_eckd_br_chr_attr = 1710 __ATTR(br_chr, 0644, eckd_dump_br_chr_show, eckd_dump_br_chr_store); 1711 1712 static struct attribute *dump_eckd_attrs[] = { 1713 &sys_dump_eckd_device_attr.attr, 1714 &sys_dump_eckd_bootprog_attr.attr, 1715 &sys_dump_eckd_br_chr_attr.attr, 1716 NULL, 1717 }; 1718 1719 static struct attribute_group dump_eckd_attr_group = { 1720 .name = IPL_ECKD_STR, 1721 .attrs = dump_eckd_attrs, 1722 }; 1723 1724 /* CCW dump device attributes */ 1725 DEFINE_IPL_CCW_ATTR_RW(dump_ccw, device, dump_block_ccw->ccw); 1726 1727 static struct attribute *dump_ccw_attrs[] = { 1728 &sys_dump_ccw_device_attr.attr, 1729 NULL, 1730 }; 1731 1732 static struct attribute_group dump_ccw_attr_group = { 1733 .name = IPL_CCW_STR, 1734 .attrs = dump_ccw_attrs, 1735 }; 1736 1737 /* dump type */ 1738 1739 static int dump_set_type(enum dump_type type) 1740 { 1741 if (!(dump_capabilities & type)) 1742 return -EINVAL; 1743 dump_type = type; 1744 return 0; 1745 } 1746 1747 static ssize_t dump_type_show(struct kobject *kobj, 1748 struct kobj_attribute *attr, char *page) 1749 { 1750 return sprintf(page, "%s\n", dump_type_str(dump_type)); 1751 } 1752 1753 static ssize_t dump_type_store(struct kobject *kobj, 1754 struct kobj_attribute *attr, 1755 const char *buf, size_t len) 1756 { 1757 int rc = -EINVAL; 1758 1759 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0) 1760 rc = dump_set_type(DUMP_TYPE_NONE); 1761 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0) 1762 rc = dump_set_type(DUMP_TYPE_CCW); 1763 else if (strncmp(buf, DUMP_ECKD_STR, strlen(DUMP_ECKD_STR)) == 0) 1764 rc = dump_set_type(DUMP_TYPE_ECKD); 1765 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0) 1766 rc = dump_set_type(DUMP_TYPE_FCP); 1767 else if (strncmp(buf, DUMP_NVME_STR, strlen(DUMP_NVME_STR)) == 0) 1768 rc = dump_set_type(DUMP_TYPE_NVME); 1769 return (rc != 0) ? rc : len; 1770 } 1771 1772 static struct kobj_attribute dump_type_attr = 1773 __ATTR(dump_type, 0644, dump_type_show, dump_type_store); 1774 1775 static struct kset *dump_kset; 1776 1777 static void diag308_dump(void *dump_block) 1778 { 1779 diag308(DIAG308_SET, dump_block); 1780 while (1) { 1781 if (diag308(DIAG308_LOAD_NORMAL_DUMP, NULL) != 0x302) 1782 break; 1783 udelay(USEC_PER_SEC); 1784 } 1785 } 1786 1787 static void __dump_run(void *unused) 1788 { 1789 switch (dump_type) { 1790 case DUMP_TYPE_CCW: 1791 diag308_dump(dump_block_ccw); 1792 break; 1793 case DUMP_TYPE_ECKD: 1794 diag308_dump(dump_block_eckd); 1795 break; 1796 case DUMP_TYPE_FCP: 1797 diag308_dump(dump_block_fcp); 1798 break; 1799 case DUMP_TYPE_NVME: 1800 diag308_dump(dump_block_nvme); 1801 break; 1802 default: 1803 break; 1804 } 1805 } 1806 1807 static void dump_run(struct shutdown_trigger *trigger) 1808 { 1809 if (dump_type == DUMP_TYPE_NONE) 1810 return; 1811 smp_send_stop(); 1812 smp_call_ipl_cpu(__dump_run, NULL); 1813 } 1814 1815 static int __init dump_ccw_init(void) 1816 { 1817 int rc; 1818 1819 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL); 1820 if (!dump_block_ccw) 1821 return -ENOMEM; 1822 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group); 1823 if (rc) { 1824 free_page((unsigned long)dump_block_ccw); 1825 return rc; 1826 } 1827 dump_block_ccw->hdr.len = IPL_BP_CCW_LEN; 1828 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION; 1829 dump_block_ccw->ccw.len = IPL_BP0_CCW_LEN; 1830 dump_block_ccw->ccw.pbt = IPL_PBT_CCW; 1831 dump_capabilities |= DUMP_TYPE_CCW; 1832 return 0; 1833 } 1834 1835 static int __init dump_fcp_init(void) 1836 { 1837 int rc; 1838 1839 if (!sclp_ipl_info.has_dump) 1840 return 0; /* LDIPL DUMP is not installed */ 1841 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL); 1842 if (!dump_block_fcp) 1843 return -ENOMEM; 1844 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group); 1845 if (rc) { 1846 free_page((unsigned long)dump_block_fcp); 1847 return rc; 1848 } 1849 dump_block_fcp->hdr.len = IPL_BP_FCP_LEN; 1850 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION; 1851 dump_block_fcp->fcp.len = IPL_BP0_FCP_LEN; 1852 dump_block_fcp->fcp.pbt = IPL_PBT_FCP; 1853 dump_block_fcp->fcp.opt = IPL_PB0_FCP_OPT_DUMP; 1854 dump_capabilities |= DUMP_TYPE_FCP; 1855 return 0; 1856 } 1857 1858 static int __init dump_nvme_init(void) 1859 { 1860 int rc; 1861 1862 if (!sclp_ipl_info.has_dump) 1863 return 0; /* LDIPL DUMP is not installed */ 1864 dump_block_nvme = (void *) get_zeroed_page(GFP_KERNEL); 1865 if (!dump_block_nvme) 1866 return -ENOMEM; 1867 rc = sysfs_create_group(&dump_kset->kobj, &dump_nvme_attr_group); 1868 if (rc) { 1869 free_page((unsigned long)dump_block_nvme); 1870 return rc; 1871 } 1872 dump_block_nvme->hdr.len = IPL_BP_NVME_LEN; 1873 dump_block_nvme->hdr.version = IPL_PARM_BLOCK_VERSION; 1874 dump_block_nvme->fcp.len = IPL_BP0_NVME_LEN; 1875 dump_block_nvme->fcp.pbt = IPL_PBT_NVME; 1876 dump_block_nvme->fcp.opt = IPL_PB0_NVME_OPT_DUMP; 1877 dump_capabilities |= DUMP_TYPE_NVME; 1878 return 0; 1879 } 1880 1881 static int __init dump_eckd_init(void) 1882 { 1883 int rc; 1884 1885 if (!sclp_ipl_info.has_dump || !sclp.has_sipl_eckd) 1886 return 0; /* LDIPL DUMP is not installed */ 1887 dump_block_eckd = (void *)get_zeroed_page(GFP_KERNEL); 1888 if (!dump_block_eckd) 1889 return -ENOMEM; 1890 rc = sysfs_create_group(&dump_kset->kobj, &dump_eckd_attr_group); 1891 if (rc) { 1892 free_page((unsigned long)dump_block_eckd); 1893 return rc; 1894 } 1895 dump_block_eckd->hdr.len = IPL_BP_ECKD_LEN; 1896 dump_block_eckd->hdr.version = IPL_PARM_BLOCK_VERSION; 1897 dump_block_eckd->eckd.len = IPL_BP0_ECKD_LEN; 1898 dump_block_eckd->eckd.pbt = IPL_PBT_ECKD; 1899 dump_block_eckd->eckd.opt = IPL_PB0_ECKD_OPT_DUMP; 1900 dump_capabilities |= DUMP_TYPE_ECKD; 1901 return 0; 1902 } 1903 1904 static int __init dump_init(void) 1905 { 1906 int rc; 1907 1908 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj); 1909 if (!dump_kset) 1910 return -ENOMEM; 1911 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr); 1912 if (rc) { 1913 kset_unregister(dump_kset); 1914 return rc; 1915 } 1916 rc = dump_ccw_init(); 1917 if (rc) 1918 return rc; 1919 rc = dump_eckd_init(); 1920 if (rc) 1921 return rc; 1922 rc = dump_fcp_init(); 1923 if (rc) 1924 return rc; 1925 rc = dump_nvme_init(); 1926 if (rc) 1927 return rc; 1928 dump_set_type(DUMP_TYPE_NONE); 1929 return 0; 1930 } 1931 1932 static struct shutdown_action __refdata dump_action = { 1933 .name = SHUTDOWN_ACTION_DUMP_STR, 1934 .fn = dump_run, 1935 .init = dump_init, 1936 }; 1937 1938 static void dump_reipl_run(struct shutdown_trigger *trigger) 1939 { 1940 struct lowcore *abs_lc; 1941 unsigned int csum; 1942 1943 /* 1944 * Set REIPL_CLEAR flag in os_info flags entry indicating 1945 * 'clear' sysfs attribute has been set on the panicked system 1946 * for specified reipl type. 1947 * Always set for IPL_TYPE_NSS and IPL_TYPE_UNKNOWN. 1948 */ 1949 if ((reipl_type == IPL_TYPE_CCW && reipl_ccw_clear) || 1950 (reipl_type == IPL_TYPE_ECKD && reipl_eckd_clear) || 1951 (reipl_type == IPL_TYPE_FCP && reipl_fcp_clear) || 1952 (reipl_type == IPL_TYPE_NVME && reipl_nvme_clear) || 1953 reipl_type == IPL_TYPE_NSS || 1954 reipl_type == IPL_TYPE_UNKNOWN) 1955 os_info_flags |= OS_INFO_FLAG_REIPL_CLEAR; 1956 os_info_entry_add(OS_INFO_FLAGS_ENTRY, &os_info_flags, sizeof(os_info_flags)); 1957 csum = (__force unsigned int) 1958 csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0); 1959 abs_lc = get_abs_lowcore(); 1960 abs_lc->ipib = __pa(reipl_block_actual); 1961 abs_lc->ipib_checksum = csum; 1962 put_abs_lowcore(abs_lc); 1963 dump_run(trigger); 1964 } 1965 1966 static struct shutdown_action __refdata dump_reipl_action = { 1967 .name = SHUTDOWN_ACTION_DUMP_REIPL_STR, 1968 .fn = dump_reipl_run, 1969 }; 1970 1971 /* 1972 * vmcmd shutdown action: Trigger vm command on shutdown. 1973 */ 1974 1975 static char vmcmd_on_reboot[128]; 1976 static char vmcmd_on_panic[128]; 1977 static char vmcmd_on_halt[128]; 1978 static char vmcmd_on_poff[128]; 1979 static char vmcmd_on_restart[128]; 1980 1981 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot); 1982 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic); 1983 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt); 1984 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff); 1985 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart); 1986 1987 static struct attribute *vmcmd_attrs[] = { 1988 &sys_vmcmd_on_reboot_attr.attr, 1989 &sys_vmcmd_on_panic_attr.attr, 1990 &sys_vmcmd_on_halt_attr.attr, 1991 &sys_vmcmd_on_poff_attr.attr, 1992 &sys_vmcmd_on_restart_attr.attr, 1993 NULL, 1994 }; 1995 1996 static struct attribute_group vmcmd_attr_group = { 1997 .attrs = vmcmd_attrs, 1998 }; 1999 2000 static struct kset *vmcmd_kset; 2001 2002 static void vmcmd_run(struct shutdown_trigger *trigger) 2003 { 2004 char *cmd; 2005 2006 if (strcmp(trigger->name, ON_REIPL_STR) == 0) 2007 cmd = vmcmd_on_reboot; 2008 else if (strcmp(trigger->name, ON_PANIC_STR) == 0) 2009 cmd = vmcmd_on_panic; 2010 else if (strcmp(trigger->name, ON_HALT_STR) == 0) 2011 cmd = vmcmd_on_halt; 2012 else if (strcmp(trigger->name, ON_POFF_STR) == 0) 2013 cmd = vmcmd_on_poff; 2014 else if (strcmp(trigger->name, ON_RESTART_STR) == 0) 2015 cmd = vmcmd_on_restart; 2016 else 2017 return; 2018 2019 if (strlen(cmd) == 0) 2020 return; 2021 __cpcmd(cmd, NULL, 0, NULL); 2022 } 2023 2024 static int vmcmd_init(void) 2025 { 2026 if (!MACHINE_IS_VM) 2027 return -EOPNOTSUPP; 2028 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj); 2029 if (!vmcmd_kset) 2030 return -ENOMEM; 2031 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group); 2032 } 2033 2034 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR, 2035 vmcmd_run, vmcmd_init}; 2036 2037 /* 2038 * stop shutdown action: Stop Linux on shutdown. 2039 */ 2040 2041 static void stop_run(struct shutdown_trigger *trigger) 2042 { 2043 if (strcmp(trigger->name, ON_PANIC_STR) == 0 || 2044 strcmp(trigger->name, ON_RESTART_STR) == 0) 2045 disabled_wait(); 2046 smp_stop_cpu(); 2047 } 2048 2049 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR, 2050 stop_run, NULL}; 2051 2052 /* action list */ 2053 2054 static struct shutdown_action *shutdown_actions_list[] = { 2055 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action, 2056 &vmcmd_action, &stop_action}; 2057 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *)) 2058 2059 /* 2060 * Trigger section 2061 */ 2062 2063 static struct kset *shutdown_actions_kset; 2064 2065 static int set_trigger(const char *buf, struct shutdown_trigger *trigger, 2066 size_t len) 2067 { 2068 int i; 2069 2070 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) { 2071 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) { 2072 if (shutdown_actions_list[i]->init_rc) { 2073 return shutdown_actions_list[i]->init_rc; 2074 } else { 2075 trigger->action = shutdown_actions_list[i]; 2076 return len; 2077 } 2078 } 2079 } 2080 return -EINVAL; 2081 } 2082 2083 /* on reipl */ 2084 2085 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR, 2086 &reipl_action}; 2087 2088 static ssize_t on_reboot_show(struct kobject *kobj, 2089 struct kobj_attribute *attr, char *page) 2090 { 2091 return sprintf(page, "%s\n", on_reboot_trigger.action->name); 2092 } 2093 2094 static ssize_t on_reboot_store(struct kobject *kobj, 2095 struct kobj_attribute *attr, 2096 const char *buf, size_t len) 2097 { 2098 return set_trigger(buf, &on_reboot_trigger, len); 2099 } 2100 static struct kobj_attribute on_reboot_attr = __ATTR_RW(on_reboot); 2101 2102 static void do_machine_restart(char *__unused) 2103 { 2104 smp_send_stop(); 2105 on_reboot_trigger.action->fn(&on_reboot_trigger); 2106 reipl_run(NULL); 2107 } 2108 void (*_machine_restart)(char *command) = do_machine_restart; 2109 2110 /* on panic */ 2111 2112 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action}; 2113 2114 static ssize_t on_panic_show(struct kobject *kobj, 2115 struct kobj_attribute *attr, char *page) 2116 { 2117 return sprintf(page, "%s\n", on_panic_trigger.action->name); 2118 } 2119 2120 static ssize_t on_panic_store(struct kobject *kobj, 2121 struct kobj_attribute *attr, 2122 const char *buf, size_t len) 2123 { 2124 return set_trigger(buf, &on_panic_trigger, len); 2125 } 2126 static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic); 2127 2128 static void do_panic(void) 2129 { 2130 lgr_info_log(); 2131 on_panic_trigger.action->fn(&on_panic_trigger); 2132 stop_run(&on_panic_trigger); 2133 } 2134 2135 /* on restart */ 2136 2137 static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR, 2138 &stop_action}; 2139 2140 static ssize_t on_restart_show(struct kobject *kobj, 2141 struct kobj_attribute *attr, char *page) 2142 { 2143 return sprintf(page, "%s\n", on_restart_trigger.action->name); 2144 } 2145 2146 static ssize_t on_restart_store(struct kobject *kobj, 2147 struct kobj_attribute *attr, 2148 const char *buf, size_t len) 2149 { 2150 return set_trigger(buf, &on_restart_trigger, len); 2151 } 2152 static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart); 2153 2154 static void __do_restart(void *ignore) 2155 { 2156 smp_send_stop(); 2157 #ifdef CONFIG_CRASH_DUMP 2158 crash_kexec(NULL); 2159 #endif 2160 on_restart_trigger.action->fn(&on_restart_trigger); 2161 stop_run(&on_restart_trigger); 2162 } 2163 2164 void do_restart(void *arg) 2165 { 2166 tracing_off(); 2167 debug_locks_off(); 2168 lgr_info_log(); 2169 smp_call_online_cpu(__do_restart, arg); 2170 } 2171 2172 /* on halt */ 2173 2174 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action}; 2175 2176 static ssize_t on_halt_show(struct kobject *kobj, 2177 struct kobj_attribute *attr, char *page) 2178 { 2179 return sprintf(page, "%s\n", on_halt_trigger.action->name); 2180 } 2181 2182 static ssize_t on_halt_store(struct kobject *kobj, 2183 struct kobj_attribute *attr, 2184 const char *buf, size_t len) 2185 { 2186 return set_trigger(buf, &on_halt_trigger, len); 2187 } 2188 static struct kobj_attribute on_halt_attr = __ATTR_RW(on_halt); 2189 2190 static void do_machine_halt(void) 2191 { 2192 smp_send_stop(); 2193 on_halt_trigger.action->fn(&on_halt_trigger); 2194 stop_run(&on_halt_trigger); 2195 } 2196 void (*_machine_halt)(void) = do_machine_halt; 2197 2198 /* on power off */ 2199 2200 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action}; 2201 2202 static ssize_t on_poff_show(struct kobject *kobj, 2203 struct kobj_attribute *attr, char *page) 2204 { 2205 return sprintf(page, "%s\n", on_poff_trigger.action->name); 2206 } 2207 2208 static ssize_t on_poff_store(struct kobject *kobj, 2209 struct kobj_attribute *attr, 2210 const char *buf, size_t len) 2211 { 2212 return set_trigger(buf, &on_poff_trigger, len); 2213 } 2214 static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff); 2215 2216 static void do_machine_power_off(void) 2217 { 2218 smp_send_stop(); 2219 on_poff_trigger.action->fn(&on_poff_trigger); 2220 stop_run(&on_poff_trigger); 2221 } 2222 void (*_machine_power_off)(void) = do_machine_power_off; 2223 2224 static struct attribute *shutdown_action_attrs[] = { 2225 &on_restart_attr.attr, 2226 &on_reboot_attr.attr, 2227 &on_panic_attr.attr, 2228 &on_halt_attr.attr, 2229 &on_poff_attr.attr, 2230 NULL, 2231 }; 2232 2233 static struct attribute_group shutdown_action_attr_group = { 2234 .attrs = shutdown_action_attrs, 2235 }; 2236 2237 static void __init shutdown_triggers_init(void) 2238 { 2239 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL, 2240 firmware_kobj); 2241 if (!shutdown_actions_kset) 2242 goto fail; 2243 if (sysfs_create_group(&shutdown_actions_kset->kobj, 2244 &shutdown_action_attr_group)) 2245 goto fail; 2246 return; 2247 fail: 2248 panic("shutdown_triggers_init failed\n"); 2249 } 2250 2251 static void __init shutdown_actions_init(void) 2252 { 2253 int i; 2254 2255 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) { 2256 if (!shutdown_actions_list[i]->init) 2257 continue; 2258 shutdown_actions_list[i]->init_rc = 2259 shutdown_actions_list[i]->init(); 2260 } 2261 } 2262 2263 static int __init s390_ipl_init(void) 2264 { 2265 char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40}; 2266 2267 sclp_early_get_ipl_info(&sclp_ipl_info); 2268 /* 2269 * Fix loadparm: There are systems where the (SCSI) LOADPARM 2270 * returned by read SCP info is invalid (contains EBCDIC blanks) 2271 * when the system has been booted via diag308. In that case we use 2272 * the value from diag308, if available. 2273 * 2274 * There are also systems where diag308 store does not work in 2275 * case the system is booted from HMC. Fortunately in this case 2276 * READ SCP info provides the correct value. 2277 */ 2278 if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 && ipl_block_valid) 2279 memcpy(sclp_ipl_info.loadparm, ipl_block.ccw.loadparm, LOADPARM_LEN); 2280 shutdown_actions_init(); 2281 shutdown_triggers_init(); 2282 return 0; 2283 } 2284 2285 __initcall(s390_ipl_init); 2286 2287 static void __init strncpy_skip_quote(char *dst, char *src, int n) 2288 { 2289 int sx, dx; 2290 2291 dx = 0; 2292 for (sx = 0; src[sx] != 0; sx++) { 2293 if (src[sx] == '"') 2294 continue; 2295 dst[dx++] = src[sx]; 2296 if (dx >= n) 2297 break; 2298 } 2299 } 2300 2301 static int __init vmcmd_on_reboot_setup(char *str) 2302 { 2303 if (!MACHINE_IS_VM) 2304 return 1; 2305 strncpy_skip_quote(vmcmd_on_reboot, str, 127); 2306 vmcmd_on_reboot[127] = 0; 2307 on_reboot_trigger.action = &vmcmd_action; 2308 return 1; 2309 } 2310 __setup("vmreboot=", vmcmd_on_reboot_setup); 2311 2312 static int __init vmcmd_on_panic_setup(char *str) 2313 { 2314 if (!MACHINE_IS_VM) 2315 return 1; 2316 strncpy_skip_quote(vmcmd_on_panic, str, 127); 2317 vmcmd_on_panic[127] = 0; 2318 on_panic_trigger.action = &vmcmd_action; 2319 return 1; 2320 } 2321 __setup("vmpanic=", vmcmd_on_panic_setup); 2322 2323 static int __init vmcmd_on_halt_setup(char *str) 2324 { 2325 if (!MACHINE_IS_VM) 2326 return 1; 2327 strncpy_skip_quote(vmcmd_on_halt, str, 127); 2328 vmcmd_on_halt[127] = 0; 2329 on_halt_trigger.action = &vmcmd_action; 2330 return 1; 2331 } 2332 __setup("vmhalt=", vmcmd_on_halt_setup); 2333 2334 static int __init vmcmd_on_poff_setup(char *str) 2335 { 2336 if (!MACHINE_IS_VM) 2337 return 1; 2338 strncpy_skip_quote(vmcmd_on_poff, str, 127); 2339 vmcmd_on_poff[127] = 0; 2340 on_poff_trigger.action = &vmcmd_action; 2341 return 1; 2342 } 2343 __setup("vmpoff=", vmcmd_on_poff_setup); 2344 2345 static int on_panic_notify(struct notifier_block *self, 2346 unsigned long event, void *data) 2347 { 2348 do_panic(); 2349 return NOTIFY_OK; 2350 } 2351 2352 static struct notifier_block on_panic_nb = { 2353 .notifier_call = on_panic_notify, 2354 .priority = INT_MIN, 2355 }; 2356 2357 void __init setup_ipl(void) 2358 { 2359 BUILD_BUG_ON(sizeof(struct ipl_parameter_block) != PAGE_SIZE); 2360 2361 ipl_info.type = get_ipl_type(); 2362 switch (ipl_info.type) { 2363 case IPL_TYPE_CCW: 2364 ipl_info.data.ccw.dev_id.ssid = ipl_block.ccw.ssid; 2365 ipl_info.data.ccw.dev_id.devno = ipl_block.ccw.devno; 2366 break; 2367 case IPL_TYPE_ECKD: 2368 case IPL_TYPE_ECKD_DUMP: 2369 ipl_info.data.eckd.dev_id.ssid = ipl_block.eckd.ssid; 2370 ipl_info.data.eckd.dev_id.devno = ipl_block.eckd.devno; 2371 break; 2372 case IPL_TYPE_FCP: 2373 case IPL_TYPE_FCP_DUMP: 2374 ipl_info.data.fcp.dev_id.ssid = 0; 2375 ipl_info.data.fcp.dev_id.devno = ipl_block.fcp.devno; 2376 ipl_info.data.fcp.wwpn = ipl_block.fcp.wwpn; 2377 ipl_info.data.fcp.lun = ipl_block.fcp.lun; 2378 break; 2379 case IPL_TYPE_NVME: 2380 case IPL_TYPE_NVME_DUMP: 2381 ipl_info.data.nvme.fid = ipl_block.nvme.fid; 2382 ipl_info.data.nvme.nsid = ipl_block.nvme.nsid; 2383 break; 2384 case IPL_TYPE_NSS: 2385 case IPL_TYPE_UNKNOWN: 2386 /* We have no info to copy */ 2387 break; 2388 } 2389 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb); 2390 } 2391 2392 void s390_reset_system(void) 2393 { 2394 /* Disable prefixing */ 2395 set_prefix(0); 2396 2397 /* Disable lowcore protection */ 2398 __ctl_clear_bit(0, 28); 2399 diag_amode31_ops.diag308_reset(); 2400 } 2401 2402 #ifdef CONFIG_KEXEC_FILE 2403 2404 int ipl_report_add_component(struct ipl_report *report, struct kexec_buf *kbuf, 2405 unsigned char flags, unsigned short cert) 2406 { 2407 struct ipl_report_component *comp; 2408 2409 comp = vzalloc(sizeof(*comp)); 2410 if (!comp) 2411 return -ENOMEM; 2412 list_add_tail(&comp->list, &report->components); 2413 2414 comp->entry.addr = kbuf->mem; 2415 comp->entry.len = kbuf->memsz; 2416 comp->entry.flags = flags; 2417 comp->entry.certificate_index = cert; 2418 2419 report->size += sizeof(comp->entry); 2420 2421 return 0; 2422 } 2423 2424 int ipl_report_add_certificate(struct ipl_report *report, void *key, 2425 unsigned long addr, unsigned long len) 2426 { 2427 struct ipl_report_certificate *cert; 2428 2429 cert = vzalloc(sizeof(*cert)); 2430 if (!cert) 2431 return -ENOMEM; 2432 list_add_tail(&cert->list, &report->certificates); 2433 2434 cert->entry.addr = addr; 2435 cert->entry.len = len; 2436 cert->key = key; 2437 2438 report->size += sizeof(cert->entry); 2439 report->size += cert->entry.len; 2440 2441 return 0; 2442 } 2443 2444 struct ipl_report *ipl_report_init(struct ipl_parameter_block *ipib) 2445 { 2446 struct ipl_report *report; 2447 2448 report = vzalloc(sizeof(*report)); 2449 if (!report) 2450 return ERR_PTR(-ENOMEM); 2451 2452 report->ipib = ipib; 2453 INIT_LIST_HEAD(&report->components); 2454 INIT_LIST_HEAD(&report->certificates); 2455 2456 report->size = ALIGN(ipib->hdr.len, 8); 2457 report->size += sizeof(struct ipl_rl_hdr); 2458 report->size += sizeof(struct ipl_rb_components); 2459 report->size += sizeof(struct ipl_rb_certificates); 2460 2461 return report; 2462 } 2463 2464 void *ipl_report_finish(struct ipl_report *report) 2465 { 2466 struct ipl_report_certificate *cert; 2467 struct ipl_report_component *comp; 2468 struct ipl_rb_certificates *certs; 2469 struct ipl_parameter_block *ipib; 2470 struct ipl_rb_components *comps; 2471 struct ipl_rl_hdr *rl_hdr; 2472 void *buf, *ptr; 2473 2474 buf = vzalloc(report->size); 2475 if (!buf) 2476 goto out; 2477 ptr = buf; 2478 2479 memcpy(ptr, report->ipib, report->ipib->hdr.len); 2480 ipib = ptr; 2481 if (ipl_secure_flag) 2482 ipib->hdr.flags |= IPL_PL_FLAG_SIPL; 2483 ipib->hdr.flags |= IPL_PL_FLAG_IPLSR; 2484 ptr += report->ipib->hdr.len; 2485 ptr = PTR_ALIGN(ptr, 8); 2486 2487 rl_hdr = ptr; 2488 ptr += sizeof(*rl_hdr); 2489 2490 comps = ptr; 2491 comps->rbt = IPL_RBT_COMPONENTS; 2492 ptr += sizeof(*comps); 2493 list_for_each_entry(comp, &report->components, list) { 2494 memcpy(ptr, &comp->entry, sizeof(comp->entry)); 2495 ptr += sizeof(comp->entry); 2496 } 2497 comps->len = ptr - (void *)comps; 2498 2499 certs = ptr; 2500 certs->rbt = IPL_RBT_CERTIFICATES; 2501 ptr += sizeof(*certs); 2502 list_for_each_entry(cert, &report->certificates, list) { 2503 memcpy(ptr, &cert->entry, sizeof(cert->entry)); 2504 ptr += sizeof(cert->entry); 2505 } 2506 certs->len = ptr - (void *)certs; 2507 rl_hdr->len = ptr - (void *)rl_hdr; 2508 2509 list_for_each_entry(cert, &report->certificates, list) { 2510 memcpy(ptr, cert->key, cert->entry.len); 2511 ptr += cert->entry.len; 2512 } 2513 2514 BUG_ON(ptr > buf + report->size); 2515 out: 2516 return buf; 2517 } 2518 2519 int ipl_report_free(struct ipl_report *report) 2520 { 2521 struct ipl_report_component *comp, *ncomp; 2522 struct ipl_report_certificate *cert, *ncert; 2523 2524 list_for_each_entry_safe(comp, ncomp, &report->components, list) 2525 vfree(comp); 2526 2527 list_for_each_entry_safe(cert, ncert, &report->certificates, list) 2528 vfree(cert); 2529 2530 vfree(report); 2531 2532 return 0; 2533 } 2534 2535 #endif 2536