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 <linux/vmalloc.h> 24 #include <asm/asm-extable.h> 25 #include <asm/machine.h> 26 #include <asm/diag.h> 27 #include <asm/ipl.h> 28 #include <asm/smp.h> 29 #include <asm/setup.h> 30 #include <asm/cpcmd.h> 31 #include <asm/ebcdic.h> 32 #include <asm/sclp.h> 33 #include <asm/checksum.h> 34 #include <asm/debug.h> 35 #include <asm/abs_lowcore.h> 36 #include <asm/os_info.h> 37 #include <asm/sections.h> 38 #include <asm/boot_data.h> 39 #include "entry.h" 40 41 #define IPL_PARM_BLOCK_VERSION 0 42 43 #define IPL_UNKNOWN_STR "unknown" 44 #define IPL_CCW_STR "ccw" 45 #define IPL_ECKD_STR "eckd" 46 #define IPL_ECKD_DUMP_STR "eckd_dump" 47 #define IPL_FCP_STR "fcp" 48 #define IPL_FCP_DUMP_STR "fcp_dump" 49 #define IPL_NVME_STR "nvme" 50 #define IPL_NVME_DUMP_STR "nvme_dump" 51 #define IPL_NSS_STR "nss" 52 53 #define DUMP_CCW_STR "ccw" 54 #define DUMP_ECKD_STR "eckd" 55 #define DUMP_FCP_STR "fcp" 56 #define DUMP_NVME_STR "nvme" 57 #define DUMP_NONE_STR "none" 58 59 /* 60 * Four shutdown trigger types are supported: 61 * - panic 62 * - halt 63 * - power off 64 * - reipl 65 * - restart 66 */ 67 #define ON_PANIC_STR "on_panic" 68 #define ON_HALT_STR "on_halt" 69 #define ON_POFF_STR "on_poff" 70 #define ON_REIPL_STR "on_reboot" 71 #define ON_RESTART_STR "on_restart" 72 73 struct shutdown_action; 74 struct shutdown_trigger { 75 char *name; 76 struct shutdown_action *action; 77 }; 78 79 /* 80 * The following shutdown action types are supported: 81 */ 82 #define SHUTDOWN_ACTION_IPL_STR "ipl" 83 #define SHUTDOWN_ACTION_REIPL_STR "reipl" 84 #define SHUTDOWN_ACTION_DUMP_STR "dump" 85 #define SHUTDOWN_ACTION_VMCMD_STR "vmcmd" 86 #define SHUTDOWN_ACTION_STOP_STR "stop" 87 #define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl" 88 89 struct shutdown_action { 90 char *name; 91 void (*fn) (struct shutdown_trigger *trigger); 92 int (*init) (void); 93 int init_rc; 94 }; 95 96 static char *ipl_type_str(enum ipl_type type) 97 { 98 switch (type) { 99 case IPL_TYPE_CCW: 100 return IPL_CCW_STR; 101 case IPL_TYPE_ECKD: 102 return IPL_ECKD_STR; 103 case IPL_TYPE_ECKD_DUMP: 104 return IPL_ECKD_DUMP_STR; 105 case IPL_TYPE_FCP: 106 return IPL_FCP_STR; 107 case IPL_TYPE_FCP_DUMP: 108 return IPL_FCP_DUMP_STR; 109 case IPL_TYPE_NSS: 110 return IPL_NSS_STR; 111 case IPL_TYPE_NVME: 112 return IPL_NVME_STR; 113 case IPL_TYPE_NVME_DUMP: 114 return IPL_NVME_DUMP_STR; 115 case IPL_TYPE_UNKNOWN: 116 default: 117 return IPL_UNKNOWN_STR; 118 } 119 } 120 121 enum dump_type { 122 DUMP_TYPE_NONE = 1, 123 DUMP_TYPE_CCW = 2, 124 DUMP_TYPE_FCP = 4, 125 DUMP_TYPE_NVME = 8, 126 DUMP_TYPE_ECKD = 16, 127 }; 128 129 static char *dump_type_str(enum dump_type type) 130 { 131 switch (type) { 132 case DUMP_TYPE_NONE: 133 return DUMP_NONE_STR; 134 case DUMP_TYPE_CCW: 135 return DUMP_CCW_STR; 136 case DUMP_TYPE_ECKD: 137 return DUMP_ECKD_STR; 138 case DUMP_TYPE_FCP: 139 return DUMP_FCP_STR; 140 case DUMP_TYPE_NVME: 141 return DUMP_NVME_STR; 142 default: 143 return NULL; 144 } 145 } 146 147 int __bootdata_preserved(ipl_block_valid); 148 struct ipl_parameter_block __bootdata_preserved(ipl_block); 149 int __bootdata_preserved(ipl_secure_flag); 150 151 unsigned long __bootdata_preserved(ipl_cert_list_addr); 152 unsigned long __bootdata_preserved(ipl_cert_list_size); 153 154 unsigned long __bootdata(early_ipl_comp_list_addr); 155 unsigned long __bootdata(early_ipl_comp_list_size); 156 157 static int reipl_capabilities = IPL_TYPE_UNKNOWN; 158 159 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN; 160 static struct ipl_parameter_block *reipl_block_fcp; 161 static struct ipl_parameter_block *reipl_block_nvme; 162 static struct ipl_parameter_block *reipl_block_ccw; 163 static struct ipl_parameter_block *reipl_block_eckd; 164 static struct ipl_parameter_block *reipl_block_nss; 165 static struct ipl_parameter_block *reipl_block_actual; 166 167 static int dump_capabilities = DUMP_TYPE_NONE; 168 static enum dump_type dump_type = DUMP_TYPE_NONE; 169 static struct ipl_parameter_block *dump_block_fcp; 170 static struct ipl_parameter_block *dump_block_nvme; 171 static struct ipl_parameter_block *dump_block_ccw; 172 static struct ipl_parameter_block *dump_block_eckd; 173 174 static struct sclp_ipl_info sclp_ipl_info; 175 176 static bool reipl_nvme_clear; 177 static bool reipl_fcp_clear; 178 static bool reipl_ccw_clear; 179 static bool reipl_eckd_clear; 180 181 static unsigned long os_info_flags; 182 183 static inline int __diag308(unsigned long subcode, unsigned long addr) 184 { 185 union register_pair r1; 186 187 r1.even = addr; 188 r1.odd = 0; 189 asm_inline volatile( 190 " diag %[r1],%[subcode],0x308\n" 191 "0: nopr %%r7\n" 192 EX_TABLE(0b,0b) 193 : [r1] "+&d" (r1.pair) 194 : [subcode] "d" (subcode) 195 : "cc", "memory"); 196 return r1.odd; 197 } 198 199 int diag308(unsigned long subcode, void *addr) 200 { 201 diag_stat_inc(DIAG_STAT_X308); 202 return __diag308(subcode, addr ? virt_to_phys(addr) : 0); 203 } 204 EXPORT_SYMBOL_GPL(diag308); 205 206 /* SYSFS */ 207 208 #define IPL_ATTR_SHOW_FN(_prefix, _name, _format, args...) \ 209 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \ 210 struct kobj_attribute *attr, \ 211 char *page) \ 212 { \ 213 return sysfs_emit(page, _format, ##args); \ 214 } 215 216 #define IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk) \ 217 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \ 218 struct kobj_attribute *attr, \ 219 const char *buf, size_t len) \ 220 { \ 221 unsigned long long ssid, devno; \ 222 \ 223 if (sscanf(buf, "0.%llx.%llx\n", &ssid, &devno) != 2) \ 224 return -EINVAL; \ 225 \ 226 if (ssid > __MAX_SSID || devno > __MAX_SUBCHANNEL) \ 227 return -EINVAL; \ 228 \ 229 _ipl_blk.ssid = ssid; \ 230 _ipl_blk.devno = devno; \ 231 return len; \ 232 } 233 234 #define DEFINE_IPL_CCW_ATTR_RW(_prefix, _name, _ipl_blk) \ 235 IPL_ATTR_SHOW_FN(_prefix, _name, "0.%x.%04x\n", \ 236 _ipl_blk.ssid, _ipl_blk.devno); \ 237 IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk); \ 238 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ 239 __ATTR(_name, 0644, \ 240 sys_##_prefix##_##_name##_show, \ 241 sys_##_prefix##_##_name##_store) \ 242 243 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \ 244 IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value) \ 245 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ 246 __ATTR(_name, 0444, sys_##_prefix##_##_name##_show, NULL) 247 248 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \ 249 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value) \ 250 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \ 251 struct kobj_attribute *attr, \ 252 const char *buf, size_t len) \ 253 { \ 254 unsigned long long value; \ 255 if (sscanf(buf, _fmt_in, &value) != 1) \ 256 return -EINVAL; \ 257 _value = value; \ 258 return len; \ 259 } \ 260 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ 261 __ATTR(_name, 0644, \ 262 sys_##_prefix##_##_name##_show, \ 263 sys_##_prefix##_##_name##_store) 264 265 #define DEFINE_IPL_ATTR_BOOTPROG_RW(_prefix, _name, _fmt_out, _fmt_in, _hdr, _value) \ 266 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value) \ 267 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \ 268 struct kobj_attribute *attr, \ 269 const char *buf, size_t len) \ 270 { \ 271 unsigned long long value; \ 272 if (sscanf(buf, _fmt_in, &value) != 1) \ 273 return -EINVAL; \ 274 (_value) = value; \ 275 (_hdr).flags &= ~IPL_PL_FLAG_SBP; \ 276 return len; \ 277 } \ 278 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ 279 __ATTR(_name, 0644, \ 280 sys_##_prefix##_##_name##_show, \ 281 sys_##_prefix##_##_name##_store) 282 283 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\ 284 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, _value) \ 285 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \ 286 struct kobj_attribute *attr, \ 287 const char *buf, size_t len) \ 288 { \ 289 if (len >= sizeof(_value)) \ 290 return -E2BIG; \ 291 len = strscpy(_value, buf); \ 292 if ((ssize_t)len < 0) \ 293 return len; \ 294 strim(_value); \ 295 return len; \ 296 } \ 297 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ 298 __ATTR(_name, 0644, \ 299 sys_##_prefix##_##_name##_show, \ 300 sys_##_prefix##_##_name##_store) 301 302 #define IPL_ATTR_SCP_DATA_SHOW_FN(_prefix, _ipl_block) \ 303 static ssize_t sys_##_prefix##_scp_data_show(struct file *filp, \ 304 struct kobject *kobj, \ 305 const struct bin_attribute *attr, \ 306 char *buf, loff_t off, \ 307 size_t count) \ 308 { \ 309 size_t size = _ipl_block.scp_data_len; \ 310 void *scp_data = _ipl_block.scp_data; \ 311 \ 312 return memory_read_from_buffer(buf, count, &off, \ 313 scp_data, size); \ 314 } 315 316 #define IPL_ATTR_SCP_DATA_STORE_FN(_prefix, _ipl_block_hdr, _ipl_block, _ipl_bp_len, _ipl_bp0_len)\ 317 static ssize_t sys_##_prefix##_scp_data_store(struct file *filp, \ 318 struct kobject *kobj, \ 319 const struct bin_attribute *attr, \ 320 char *buf, loff_t off, \ 321 size_t count) \ 322 { \ 323 size_t scpdata_len = count; \ 324 size_t padding; \ 325 \ 326 if (off) \ 327 return -EINVAL; \ 328 \ 329 memcpy(_ipl_block.scp_data, buf, count); \ 330 if (scpdata_len % 8) { \ 331 padding = 8 - (scpdata_len % 8); \ 332 memset(_ipl_block.scp_data + scpdata_len, \ 333 0, padding); \ 334 scpdata_len += padding; \ 335 } \ 336 \ 337 _ipl_block_hdr.len = _ipl_bp_len + scpdata_len; \ 338 _ipl_block.len = _ipl_bp0_len + scpdata_len; \ 339 _ipl_block.scp_data_len = scpdata_len; \ 340 \ 341 return count; \ 342 } 343 344 #define DEFINE_IPL_ATTR_SCP_DATA_RO(_prefix, _ipl_block, _size) \ 345 IPL_ATTR_SCP_DATA_SHOW_FN(_prefix, _ipl_block) \ 346 static const struct bin_attribute sys_##_prefix##_scp_data_attr = \ 347 __BIN_ATTR(scp_data, 0444, sys_##_prefix##_scp_data_show, \ 348 NULL, _size) 349 350 #define DEFINE_IPL_ATTR_SCP_DATA_RW(_prefix, _ipl_block_hdr, _ipl_block, _ipl_bp_len, _ipl_bp0_len, _size)\ 351 IPL_ATTR_SCP_DATA_SHOW_FN(_prefix, _ipl_block) \ 352 IPL_ATTR_SCP_DATA_STORE_FN(_prefix, _ipl_block_hdr, _ipl_block, _ipl_bp_len, _ipl_bp0_len)\ 353 static const struct bin_attribute sys_##_prefix##_scp_data_attr = \ 354 __BIN_ATTR(scp_data, 0644, sys_##_prefix##_scp_data_show, \ 355 sys_##_prefix##_scp_data_store, _size) 356 357 /* 358 * ipl section 359 */ 360 361 static __init enum ipl_type get_ipl_type(void) 362 { 363 if (!ipl_block_valid) 364 return IPL_TYPE_UNKNOWN; 365 366 switch (ipl_block.pb0_hdr.pbt) { 367 case IPL_PBT_CCW: 368 return IPL_TYPE_CCW; 369 case IPL_PBT_FCP: 370 if (ipl_block.fcp.opt == IPL_PB0_FCP_OPT_DUMP) 371 return IPL_TYPE_FCP_DUMP; 372 else 373 return IPL_TYPE_FCP; 374 case IPL_PBT_NVME: 375 if (ipl_block.nvme.opt == IPL_PB0_NVME_OPT_DUMP) 376 return IPL_TYPE_NVME_DUMP; 377 else 378 return IPL_TYPE_NVME; 379 case IPL_PBT_ECKD: 380 if (ipl_block.eckd.opt == IPL_PB0_ECKD_OPT_DUMP) 381 return IPL_TYPE_ECKD_DUMP; 382 else 383 return IPL_TYPE_ECKD; 384 } 385 return IPL_TYPE_UNKNOWN; 386 } 387 388 struct ipl_info ipl_info; 389 EXPORT_SYMBOL_GPL(ipl_info); 390 391 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr, 392 char *page) 393 { 394 return sysfs_emit(page, "%s\n", ipl_type_str(ipl_info.type)); 395 } 396 397 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type); 398 399 static ssize_t ipl_secure_show(struct kobject *kobj, 400 struct kobj_attribute *attr, char *page) 401 { 402 return sysfs_emit(page, "%i\n", !!ipl_secure_flag); 403 } 404 405 static struct kobj_attribute sys_ipl_secure_attr = 406 __ATTR(secure, 0444, ipl_secure_show, NULL); 407 408 static ssize_t ipl_has_secure_show(struct kobject *kobj, 409 struct kobj_attribute *attr, char *page) 410 { 411 return sysfs_emit(page, "%i\n", !!sclp.has_sipl); 412 } 413 414 static struct kobj_attribute sys_ipl_has_secure_attr = 415 __ATTR(has_secure, 0444, ipl_has_secure_show, NULL); 416 417 static ssize_t ipl_vm_parm_show(struct kobject *kobj, 418 struct kobj_attribute *attr, char *page) 419 { 420 char parm[DIAG308_VMPARM_SIZE + 1] = {}; 421 422 if (ipl_block_valid && (ipl_block.pb0_hdr.pbt == IPL_PBT_CCW)) 423 ipl_block_get_ascii_vmparm(parm, sizeof(parm), &ipl_block); 424 return sysfs_emit(page, "%s\n", parm); 425 } 426 427 static struct kobj_attribute sys_ipl_vm_parm_attr = 428 __ATTR(parm, 0444, ipl_vm_parm_show, NULL); 429 430 static ssize_t sys_ipl_device_show(struct kobject *kobj, 431 struct kobj_attribute *attr, char *page) 432 { 433 switch (ipl_info.type) { 434 case IPL_TYPE_CCW: 435 return sysfs_emit(page, "0.%x.%04x\n", ipl_block.ccw.ssid, 436 ipl_block.ccw.devno); 437 case IPL_TYPE_ECKD: 438 case IPL_TYPE_ECKD_DUMP: 439 return sysfs_emit(page, "0.%x.%04x\n", ipl_block.eckd.ssid, 440 ipl_block.eckd.devno); 441 case IPL_TYPE_FCP: 442 case IPL_TYPE_FCP_DUMP: 443 return sysfs_emit(page, "0.0.%04x\n", ipl_block.fcp.devno); 444 case IPL_TYPE_NVME: 445 case IPL_TYPE_NVME_DUMP: 446 return sysfs_emit(page, "%08ux\n", ipl_block.nvme.fid); 447 default: 448 return 0; 449 } 450 } 451 452 static struct kobj_attribute sys_ipl_device_attr = 453 __ATTR(device, 0444, sys_ipl_device_show, NULL); 454 455 static ssize_t sys_ipl_parameter_read(struct file *filp, struct kobject *kobj, 456 const struct bin_attribute *attr, char *buf, 457 loff_t off, size_t count) 458 { 459 return memory_read_from_buffer(buf, count, &off, &ipl_block, 460 ipl_block.hdr.len); 461 } 462 static const struct bin_attribute sys_ipl_parameter_attr = 463 __BIN_ATTR(binary_parameter, 0444, sys_ipl_parameter_read, NULL, 464 PAGE_SIZE); 465 466 DEFINE_IPL_ATTR_SCP_DATA_RO(ipl_fcp, ipl_block.fcp, PAGE_SIZE); 467 468 static const struct bin_attribute *const ipl_fcp_bin_attrs[] = { 469 &sys_ipl_parameter_attr, 470 &sys_ipl_fcp_scp_data_attr, 471 NULL, 472 }; 473 474 DEFINE_IPL_ATTR_SCP_DATA_RO(ipl_nvme, ipl_block.nvme, PAGE_SIZE); 475 476 static const struct bin_attribute *const ipl_nvme_bin_attrs[] = { 477 &sys_ipl_parameter_attr, 478 &sys_ipl_nvme_scp_data_attr, 479 NULL, 480 }; 481 482 DEFINE_IPL_ATTR_SCP_DATA_RO(ipl_eckd, ipl_block.eckd, PAGE_SIZE); 483 484 static const struct bin_attribute *const ipl_eckd_bin_attrs[] = { 485 &sys_ipl_parameter_attr, 486 &sys_ipl_eckd_scp_data_attr, 487 NULL, 488 }; 489 490 /* FCP ipl device attributes */ 491 492 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", 493 (unsigned long long)ipl_block.fcp.wwpn); 494 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", 495 (unsigned long long)ipl_block.fcp.lun); 496 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", 497 (unsigned long long)ipl_block.fcp.bootprog); 498 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", 499 (unsigned long long)ipl_block.fcp.br_lba); 500 501 /* NVMe ipl device attributes */ 502 DEFINE_IPL_ATTR_RO(ipl_nvme, fid, "0x%08llx\n", 503 (unsigned long long)ipl_block.nvme.fid); 504 DEFINE_IPL_ATTR_RO(ipl_nvme, nsid, "0x%08llx\n", 505 (unsigned long long)ipl_block.nvme.nsid); 506 DEFINE_IPL_ATTR_RO(ipl_nvme, bootprog, "%lld\n", 507 (unsigned long long)ipl_block.nvme.bootprog); 508 DEFINE_IPL_ATTR_RO(ipl_nvme, br_lba, "%lld\n", 509 (unsigned long long)ipl_block.nvme.br_lba); 510 511 /* ECKD ipl device attributes */ 512 DEFINE_IPL_ATTR_RO(ipl_eckd, bootprog, "%lld\n", 513 (unsigned long long)ipl_block.eckd.bootprog); 514 515 #define IPL_ATTR_BR_CHR_SHOW_FN(_name, _ipb) \ 516 static ssize_t eckd_##_name##_br_chr_show(struct kobject *kobj, \ 517 struct kobj_attribute *attr, \ 518 char *buf) \ 519 { \ 520 struct ipl_pb0_eckd *ipb = &(_ipb); \ 521 \ 522 if (!ipb->br_chr.cyl && \ 523 !ipb->br_chr.head && \ 524 !ipb->br_chr.record) \ 525 return sysfs_emit(buf, "auto\n"); \ 526 \ 527 return sysfs_emit(buf, "0x%x,0x%x,0x%x\n", \ 528 ipb->br_chr.cyl, \ 529 ipb->br_chr.head, \ 530 ipb->br_chr.record); \ 531 } 532 533 #define IPL_ATTR_BR_CHR_STORE_FN(_name, _ipb) \ 534 static ssize_t eckd_##_name##_br_chr_store(struct kobject *kobj, \ 535 struct kobj_attribute *attr, \ 536 const char *buf, size_t len) \ 537 { \ 538 struct ipl_pb0_eckd *ipb = &(_ipb); \ 539 unsigned long args[3] = { 0 }; \ 540 char *p, *p1, *tmp = NULL; \ 541 int i, rc; \ 542 \ 543 if (!strncmp(buf, "auto", 4)) \ 544 goto out; \ 545 \ 546 tmp = kstrdup(buf, GFP_KERNEL); \ 547 p = tmp; \ 548 for (i = 0; i < 3; i++) { \ 549 p1 = strsep(&p, ", "); \ 550 if (!p1) { \ 551 rc = -EINVAL; \ 552 goto err; \ 553 } \ 554 rc = kstrtoul(p1, 0, args + i); \ 555 if (rc) \ 556 goto err; \ 557 } \ 558 \ 559 rc = -EINVAL; \ 560 if (i != 3) \ 561 goto err; \ 562 \ 563 if ((args[0] || args[1]) && !args[2]) \ 564 goto err; \ 565 \ 566 if (args[0] > UINT_MAX || args[1] > 255 || args[2] > 255) \ 567 goto err; \ 568 \ 569 out: \ 570 ipb->br_chr.cyl = args[0]; \ 571 ipb->br_chr.head = args[1]; \ 572 ipb->br_chr.record = args[2]; \ 573 rc = len; \ 574 err: \ 575 kfree(tmp); \ 576 return rc; \ 577 } 578 579 IPL_ATTR_BR_CHR_SHOW_FN(ipl, ipl_block.eckd); 580 static struct kobj_attribute sys_ipl_eckd_br_chr_attr = 581 __ATTR(br_chr, 0644, eckd_ipl_br_chr_show, NULL); 582 583 IPL_ATTR_BR_CHR_SHOW_FN(reipl, reipl_block_eckd->eckd); 584 IPL_ATTR_BR_CHR_STORE_FN(reipl, reipl_block_eckd->eckd); 585 586 static struct kobj_attribute sys_reipl_eckd_br_chr_attr = 587 __ATTR(br_chr, 0644, eckd_reipl_br_chr_show, eckd_reipl_br_chr_store); 588 589 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj, 590 struct kobj_attribute *attr, char *page) 591 { 592 char loadparm[LOADPARM_LEN + 1] = {}; 593 594 if (!sclp_ipl_info.is_valid) 595 return sysfs_emit(page, "#unknown#\n"); 596 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN); 597 EBCASC(loadparm, LOADPARM_LEN); 598 strim(loadparm); 599 return sysfs_emit(page, "%s\n", loadparm); 600 } 601 602 static struct kobj_attribute sys_ipl_ccw_loadparm_attr = 603 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL); 604 605 static struct attribute *ipl_fcp_attrs[] = { 606 &sys_ipl_device_attr.attr, 607 &sys_ipl_fcp_wwpn_attr.attr, 608 &sys_ipl_fcp_lun_attr.attr, 609 &sys_ipl_fcp_bootprog_attr.attr, 610 &sys_ipl_fcp_br_lba_attr.attr, 611 &sys_ipl_ccw_loadparm_attr.attr, 612 NULL, 613 }; 614 615 static const struct attribute_group ipl_fcp_attr_group = { 616 .attrs = ipl_fcp_attrs, 617 .bin_attrs = ipl_fcp_bin_attrs, 618 }; 619 620 static struct attribute *ipl_nvme_attrs[] = { 621 &sys_ipl_nvme_fid_attr.attr, 622 &sys_ipl_nvme_nsid_attr.attr, 623 &sys_ipl_nvme_bootprog_attr.attr, 624 &sys_ipl_nvme_br_lba_attr.attr, 625 &sys_ipl_ccw_loadparm_attr.attr, 626 NULL, 627 }; 628 629 static const struct attribute_group ipl_nvme_attr_group = { 630 .attrs = ipl_nvme_attrs, 631 .bin_attrs = ipl_nvme_bin_attrs, 632 }; 633 634 static struct attribute *ipl_eckd_attrs[] = { 635 &sys_ipl_eckd_bootprog_attr.attr, 636 &sys_ipl_eckd_br_chr_attr.attr, 637 &sys_ipl_ccw_loadparm_attr.attr, 638 &sys_ipl_device_attr.attr, 639 NULL, 640 }; 641 642 static const struct attribute_group ipl_eckd_attr_group = { 643 .attrs = ipl_eckd_attrs, 644 .bin_attrs = ipl_eckd_bin_attrs, 645 }; 646 647 /* CCW ipl device attributes */ 648 649 static struct attribute *ipl_ccw_attrs_vm[] = { 650 &sys_ipl_device_attr.attr, 651 &sys_ipl_ccw_loadparm_attr.attr, 652 &sys_ipl_vm_parm_attr.attr, 653 NULL, 654 }; 655 656 static struct attribute *ipl_ccw_attrs_lpar[] = { 657 &sys_ipl_device_attr.attr, 658 &sys_ipl_ccw_loadparm_attr.attr, 659 NULL, 660 }; 661 662 static const struct attribute_group ipl_ccw_attr_group_vm = { 663 .attrs = ipl_ccw_attrs_vm, 664 }; 665 666 static const struct attribute_group ipl_ccw_attr_group_lpar = { 667 .attrs = ipl_ccw_attrs_lpar 668 }; 669 670 static struct attribute *ipl_common_attrs[] = { 671 &sys_ipl_type_attr.attr, 672 &sys_ipl_secure_attr.attr, 673 &sys_ipl_has_secure_attr.attr, 674 NULL, 675 }; 676 677 static const struct attribute_group ipl_common_attr_group = { 678 .attrs = ipl_common_attrs, 679 }; 680 681 static struct kset *ipl_kset; 682 683 static void __ipl_run(void *unused) 684 { 685 diag308(DIAG308_LOAD_CLEAR, NULL); 686 } 687 688 static void ipl_run(struct shutdown_trigger *trigger) 689 { 690 smp_call_ipl_cpu(__ipl_run, NULL); 691 } 692 693 static int __init ipl_init(void) 694 { 695 int rc; 696 697 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj); 698 if (!ipl_kset) { 699 rc = -ENOMEM; 700 goto out; 701 } 702 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_common_attr_group); 703 if (rc) 704 goto out; 705 switch (ipl_info.type) { 706 case IPL_TYPE_CCW: 707 if (machine_is_vm()) 708 rc = sysfs_create_group(&ipl_kset->kobj, 709 &ipl_ccw_attr_group_vm); 710 else 711 rc = sysfs_create_group(&ipl_kset->kobj, 712 &ipl_ccw_attr_group_lpar); 713 break; 714 case IPL_TYPE_ECKD: 715 case IPL_TYPE_ECKD_DUMP: 716 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_eckd_attr_group); 717 break; 718 case IPL_TYPE_FCP: 719 case IPL_TYPE_FCP_DUMP: 720 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group); 721 break; 722 case IPL_TYPE_NVME: 723 case IPL_TYPE_NVME_DUMP: 724 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nvme_attr_group); 725 break; 726 default: 727 break; 728 } 729 out: 730 if (rc) 731 panic("ipl_init failed: rc = %i\n", rc); 732 733 return 0; 734 } 735 736 static struct shutdown_action __refdata ipl_action = { 737 .name = SHUTDOWN_ACTION_IPL_STR, 738 .fn = ipl_run, 739 .init = ipl_init, 740 }; 741 742 /* 743 * reipl shutdown action: Reboot Linux on shutdown. 744 */ 745 746 /* VM IPL PARM attributes */ 747 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb, 748 char *page) 749 { 750 char vmparm[DIAG308_VMPARM_SIZE + 1] = {}; 751 752 ipl_block_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb); 753 return sysfs_emit(page, "%s\n", vmparm); 754 } 755 756 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb, 757 size_t vmparm_max, 758 const char *buf, size_t len) 759 { 760 int i, ip_len; 761 762 /* ignore trailing newline */ 763 ip_len = len; 764 if ((len > 0) && (buf[len - 1] == '\n')) 765 ip_len--; 766 767 if (ip_len > vmparm_max) 768 return -EINVAL; 769 770 /* parm is used to store kernel options, check for common chars */ 771 for (i = 0; i < ip_len; i++) 772 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i]))) 773 return -EINVAL; 774 775 memset(ipb->ccw.vm_parm, 0, DIAG308_VMPARM_SIZE); 776 ipb->ccw.vm_parm_len = ip_len; 777 if (ip_len > 0) { 778 ipb->ccw.vm_flags |= IPL_PB0_CCW_VM_FLAG_VP; 779 memcpy(ipb->ccw.vm_parm, buf, ip_len); 780 ASCEBC(ipb->ccw.vm_parm, ip_len); 781 } else { 782 ipb->ccw.vm_flags &= ~IPL_PB0_CCW_VM_FLAG_VP; 783 } 784 785 return len; 786 } 787 788 /* NSS wrapper */ 789 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj, 790 struct kobj_attribute *attr, char *page) 791 { 792 return reipl_generic_vmparm_show(reipl_block_nss, page); 793 } 794 795 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj, 796 struct kobj_attribute *attr, 797 const char *buf, size_t len) 798 { 799 return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len); 800 } 801 802 /* CCW wrapper */ 803 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj, 804 struct kobj_attribute *attr, char *page) 805 { 806 return reipl_generic_vmparm_show(reipl_block_ccw, page); 807 } 808 809 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj, 810 struct kobj_attribute *attr, 811 const char *buf, size_t len) 812 { 813 return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len); 814 } 815 816 static struct kobj_attribute sys_reipl_nss_vmparm_attr = 817 __ATTR(parm, 0644, reipl_nss_vmparm_show, 818 reipl_nss_vmparm_store); 819 static struct kobj_attribute sys_reipl_ccw_vmparm_attr = 820 __ATTR(parm, 0644, reipl_ccw_vmparm_show, 821 reipl_ccw_vmparm_store); 822 823 /* FCP reipl device attributes */ 824 825 DEFINE_IPL_ATTR_SCP_DATA_RW(reipl_fcp, reipl_block_fcp->hdr, 826 reipl_block_fcp->fcp, 827 IPL_BP_FCP_LEN, IPL_BP0_FCP_LEN, 828 DIAG308_SCPDATA_SIZE); 829 830 static const struct bin_attribute *const reipl_fcp_bin_attrs[] = { 831 &sys_reipl_fcp_scp_data_attr, 832 NULL, 833 }; 834 835 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n", 836 reipl_block_fcp->fcp.wwpn); 837 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n", 838 reipl_block_fcp->fcp.lun); 839 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n", 840 reipl_block_fcp->fcp.br_lba); 841 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n", 842 reipl_block_fcp->fcp.devno); 843 DEFINE_IPL_ATTR_BOOTPROG_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n", 844 reipl_block_fcp->hdr, 845 reipl_block_fcp->fcp.bootprog); 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 sysfs_emit(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 sysfs_emit(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 const 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 DEFINE_IPL_ATTR_SCP_DATA_RW(reipl_nvme, reipl_block_nvme->hdr, 951 reipl_block_nvme->nvme, 952 IPL_BP_NVME_LEN, IPL_BP0_NVME_LEN, 953 DIAG308_SCPDATA_SIZE); 954 955 static const struct bin_attribute *const reipl_nvme_bin_attrs[] = { 956 &sys_reipl_nvme_scp_data_attr, 957 NULL, 958 }; 959 960 DEFINE_IPL_ATTR_RW(reipl_nvme, fid, "0x%08llx\n", "%llx\n", 961 reipl_block_nvme->nvme.fid); 962 DEFINE_IPL_ATTR_RW(reipl_nvme, nsid, "0x%08llx\n", "%llx\n", 963 reipl_block_nvme->nvme.nsid); 964 DEFINE_IPL_ATTR_RW(reipl_nvme, br_lba, "%lld\n", "%lld\n", 965 reipl_block_nvme->nvme.br_lba); 966 DEFINE_IPL_ATTR_BOOTPROG_RW(reipl_nvme, bootprog, "%lld\n", "%lld\n", 967 reipl_block_nvme->hdr, 968 reipl_block_nvme->nvme.bootprog); 969 970 static struct attribute *reipl_nvme_attrs[] = { 971 &sys_reipl_nvme_fid_attr.attr, 972 &sys_reipl_nvme_nsid_attr.attr, 973 &sys_reipl_nvme_bootprog_attr.attr, 974 &sys_reipl_nvme_br_lba_attr.attr, 975 &sys_reipl_nvme_loadparm_attr.attr, 976 NULL, 977 }; 978 979 static const struct attribute_group reipl_nvme_attr_group = { 980 .attrs = reipl_nvme_attrs, 981 .bin_attrs = reipl_nvme_bin_attrs 982 }; 983 984 static ssize_t reipl_nvme_clear_show(struct kobject *kobj, 985 struct kobj_attribute *attr, char *page) 986 { 987 return sysfs_emit(page, "%u\n", reipl_nvme_clear); 988 } 989 990 static ssize_t reipl_nvme_clear_store(struct kobject *kobj, 991 struct kobj_attribute *attr, 992 const char *buf, size_t len) 993 { 994 if (kstrtobool(buf, &reipl_nvme_clear) < 0) 995 return -EINVAL; 996 return len; 997 } 998 999 static struct kobj_attribute sys_reipl_nvme_clear_attr = 1000 __ATTR(clear, 0644, reipl_nvme_clear_show, reipl_nvme_clear_store); 1001 1002 /* CCW reipl device attributes */ 1003 DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ccw); 1004 1005 static ssize_t reipl_ccw_clear_show(struct kobject *kobj, 1006 struct kobj_attribute *attr, char *page) 1007 { 1008 return sysfs_emit(page, "%u\n", reipl_ccw_clear); 1009 } 1010 1011 static ssize_t reipl_ccw_clear_store(struct kobject *kobj, 1012 struct kobj_attribute *attr, 1013 const char *buf, size_t len) 1014 { 1015 if (kstrtobool(buf, &reipl_ccw_clear) < 0) 1016 return -EINVAL; 1017 return len; 1018 } 1019 1020 static struct kobj_attribute sys_reipl_ccw_clear_attr = 1021 __ATTR(clear, 0644, reipl_ccw_clear_show, reipl_ccw_clear_store); 1022 1023 static struct attribute *reipl_ccw_attrs_vm[] = { 1024 &sys_reipl_ccw_device_attr.attr, 1025 &sys_reipl_ccw_loadparm_attr.attr, 1026 &sys_reipl_ccw_vmparm_attr.attr, 1027 &sys_reipl_ccw_clear_attr.attr, 1028 NULL, 1029 }; 1030 1031 static struct attribute *reipl_ccw_attrs_lpar[] = { 1032 &sys_reipl_ccw_device_attr.attr, 1033 &sys_reipl_ccw_loadparm_attr.attr, 1034 &sys_reipl_ccw_clear_attr.attr, 1035 NULL, 1036 }; 1037 1038 static struct attribute_group reipl_ccw_attr_group_vm = { 1039 .name = IPL_CCW_STR, 1040 .attrs = reipl_ccw_attrs_vm, 1041 }; 1042 1043 static struct attribute_group reipl_ccw_attr_group_lpar = { 1044 .name = IPL_CCW_STR, 1045 .attrs = reipl_ccw_attrs_lpar, 1046 }; 1047 1048 /* ECKD reipl device attributes */ 1049 1050 DEFINE_IPL_ATTR_SCP_DATA_RW(reipl_eckd, reipl_block_eckd->hdr, 1051 reipl_block_eckd->eckd, 1052 IPL_BP_ECKD_LEN, IPL_BP0_ECKD_LEN, 1053 DIAG308_SCPDATA_SIZE); 1054 1055 static const struct bin_attribute *const reipl_eckd_bin_attrs[] = { 1056 &sys_reipl_eckd_scp_data_attr, 1057 NULL, 1058 }; 1059 1060 DEFINE_IPL_CCW_ATTR_RW(reipl_eckd, device, reipl_block_eckd->eckd); 1061 DEFINE_IPL_ATTR_BOOTPROG_RW(reipl_eckd, bootprog, "%lld\n", "%lld\n", 1062 reipl_block_eckd->hdr, 1063 reipl_block_eckd->eckd.bootprog); 1064 1065 static struct attribute *reipl_eckd_attrs[] = { 1066 &sys_reipl_eckd_device_attr.attr, 1067 &sys_reipl_eckd_bootprog_attr.attr, 1068 &sys_reipl_eckd_br_chr_attr.attr, 1069 &sys_reipl_eckd_loadparm_attr.attr, 1070 NULL, 1071 }; 1072 1073 static const struct attribute_group reipl_eckd_attr_group = { 1074 .attrs = reipl_eckd_attrs, 1075 .bin_attrs = reipl_eckd_bin_attrs 1076 }; 1077 1078 static ssize_t reipl_eckd_clear_show(struct kobject *kobj, 1079 struct kobj_attribute *attr, char *page) 1080 { 1081 return sysfs_emit(page, "%u\n", reipl_eckd_clear); 1082 } 1083 1084 static ssize_t reipl_eckd_clear_store(struct kobject *kobj, 1085 struct kobj_attribute *attr, 1086 const char *buf, size_t len) 1087 { 1088 if (kstrtobool(buf, &reipl_eckd_clear) < 0) 1089 return -EINVAL; 1090 return len; 1091 } 1092 1093 static struct kobj_attribute sys_reipl_eckd_clear_attr = 1094 __ATTR(clear, 0644, reipl_eckd_clear_show, reipl_eckd_clear_store); 1095 1096 /* NSS reipl device attributes */ 1097 static void reipl_get_ascii_nss_name(char *dst, 1098 struct ipl_parameter_block *ipb) 1099 { 1100 memcpy(dst, ipb->ccw.nss_name, NSS_NAME_SIZE); 1101 EBCASC(dst, NSS_NAME_SIZE); 1102 dst[NSS_NAME_SIZE] = 0; 1103 } 1104 1105 static ssize_t reipl_nss_name_show(struct kobject *kobj, 1106 struct kobj_attribute *attr, char *page) 1107 { 1108 char nss_name[NSS_NAME_SIZE + 1] = {}; 1109 1110 reipl_get_ascii_nss_name(nss_name, reipl_block_nss); 1111 return sysfs_emit(page, "%s\n", nss_name); 1112 } 1113 1114 static ssize_t reipl_nss_name_store(struct kobject *kobj, 1115 struct kobj_attribute *attr, 1116 const char *buf, size_t len) 1117 { 1118 int nss_len; 1119 1120 /* ignore trailing newline */ 1121 nss_len = len; 1122 if ((len > 0) && (buf[len - 1] == '\n')) 1123 nss_len--; 1124 1125 if (nss_len > NSS_NAME_SIZE) 1126 return -EINVAL; 1127 1128 memset(reipl_block_nss->ccw.nss_name, 0x40, NSS_NAME_SIZE); 1129 if (nss_len > 0) { 1130 reipl_block_nss->ccw.vm_flags |= IPL_PB0_CCW_VM_FLAG_NSS; 1131 memcpy(reipl_block_nss->ccw.nss_name, buf, nss_len); 1132 ASCEBC(reipl_block_nss->ccw.nss_name, nss_len); 1133 EBC_TOUPPER(reipl_block_nss->ccw.nss_name, nss_len); 1134 } else { 1135 reipl_block_nss->ccw.vm_flags &= ~IPL_PB0_CCW_VM_FLAG_NSS; 1136 } 1137 1138 return len; 1139 } 1140 1141 static struct kobj_attribute sys_reipl_nss_name_attr = 1142 __ATTR(name, 0644, reipl_nss_name_show, 1143 reipl_nss_name_store); 1144 1145 static struct attribute *reipl_nss_attrs[] = { 1146 &sys_reipl_nss_name_attr.attr, 1147 &sys_reipl_nss_loadparm_attr.attr, 1148 &sys_reipl_nss_vmparm_attr.attr, 1149 NULL, 1150 }; 1151 1152 static struct attribute_group reipl_nss_attr_group = { 1153 .name = IPL_NSS_STR, 1154 .attrs = reipl_nss_attrs, 1155 }; 1156 1157 void set_os_info_reipl_block(void) 1158 { 1159 os_info_entry_add_data(OS_INFO_REIPL_BLOCK, reipl_block_actual, 1160 reipl_block_actual->hdr.len); 1161 } 1162 1163 /* reipl type */ 1164 1165 static int reipl_set_type(enum ipl_type type) 1166 { 1167 if (!(reipl_capabilities & type)) 1168 return -EINVAL; 1169 1170 switch(type) { 1171 case IPL_TYPE_CCW: 1172 reipl_block_actual = reipl_block_ccw; 1173 break; 1174 case IPL_TYPE_ECKD: 1175 reipl_block_actual = reipl_block_eckd; 1176 break; 1177 case IPL_TYPE_FCP: 1178 reipl_block_actual = reipl_block_fcp; 1179 break; 1180 case IPL_TYPE_NVME: 1181 reipl_block_actual = reipl_block_nvme; 1182 break; 1183 case IPL_TYPE_NSS: 1184 reipl_block_actual = reipl_block_nss; 1185 break; 1186 default: 1187 break; 1188 } 1189 reipl_type = type; 1190 return 0; 1191 } 1192 1193 static ssize_t reipl_type_show(struct kobject *kobj, 1194 struct kobj_attribute *attr, char *page) 1195 { 1196 return sysfs_emit(page, "%s\n", ipl_type_str(reipl_type)); 1197 } 1198 1199 static ssize_t reipl_type_store(struct kobject *kobj, 1200 struct kobj_attribute *attr, 1201 const char *buf, size_t len) 1202 { 1203 int rc = -EINVAL; 1204 1205 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0) 1206 rc = reipl_set_type(IPL_TYPE_CCW); 1207 else if (strncmp(buf, IPL_ECKD_STR, strlen(IPL_ECKD_STR)) == 0) 1208 rc = reipl_set_type(IPL_TYPE_ECKD); 1209 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0) 1210 rc = reipl_set_type(IPL_TYPE_FCP); 1211 else if (strncmp(buf, IPL_NVME_STR, strlen(IPL_NVME_STR)) == 0) 1212 rc = reipl_set_type(IPL_TYPE_NVME); 1213 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0) 1214 rc = reipl_set_type(IPL_TYPE_NSS); 1215 return (rc != 0) ? rc : len; 1216 } 1217 1218 static struct kobj_attribute reipl_type_attr = 1219 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store); 1220 1221 static struct kset *reipl_kset; 1222 static struct kset *reipl_fcp_kset; 1223 static struct kset *reipl_nvme_kset; 1224 static struct kset *reipl_eckd_kset; 1225 1226 static void __reipl_run(void *unused) 1227 { 1228 switch (reipl_type) { 1229 case IPL_TYPE_CCW: 1230 diag308(DIAG308_SET, reipl_block_ccw); 1231 if (reipl_ccw_clear) 1232 diag308(DIAG308_LOAD_CLEAR, NULL); 1233 else 1234 diag308(DIAG308_LOAD_NORMAL_DUMP, NULL); 1235 break; 1236 case IPL_TYPE_ECKD: 1237 diag308(DIAG308_SET, reipl_block_eckd); 1238 if (reipl_eckd_clear) 1239 diag308(DIAG308_LOAD_CLEAR, NULL); 1240 else 1241 diag308(DIAG308_LOAD_NORMAL, NULL); 1242 break; 1243 case IPL_TYPE_FCP: 1244 diag308(DIAG308_SET, reipl_block_fcp); 1245 if (reipl_fcp_clear) 1246 diag308(DIAG308_LOAD_CLEAR, NULL); 1247 else 1248 diag308(DIAG308_LOAD_NORMAL, NULL); 1249 break; 1250 case IPL_TYPE_NVME: 1251 diag308(DIAG308_SET, reipl_block_nvme); 1252 if (reipl_nvme_clear) 1253 diag308(DIAG308_LOAD_CLEAR, NULL); 1254 else 1255 diag308(DIAG308_LOAD_NORMAL, NULL); 1256 break; 1257 case IPL_TYPE_NSS: 1258 diag308(DIAG308_SET, reipl_block_nss); 1259 diag308(DIAG308_LOAD_CLEAR, NULL); 1260 break; 1261 case IPL_TYPE_UNKNOWN: 1262 diag308(DIAG308_LOAD_CLEAR, NULL); 1263 break; 1264 case IPL_TYPE_FCP_DUMP: 1265 case IPL_TYPE_NVME_DUMP: 1266 case IPL_TYPE_ECKD_DUMP: 1267 break; 1268 } 1269 disabled_wait(); 1270 } 1271 1272 static void reipl_run(struct shutdown_trigger *trigger) 1273 { 1274 smp_call_ipl_cpu(__reipl_run, NULL); 1275 } 1276 1277 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb) 1278 { 1279 ipb->hdr.len = IPL_BP_CCW_LEN; 1280 ipb->hdr.version = IPL_PARM_BLOCK_VERSION; 1281 ipb->pb0_hdr.len = IPL_BP0_CCW_LEN; 1282 ipb->pb0_hdr.pbt = IPL_PBT_CCW; 1283 } 1284 1285 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb) 1286 { 1287 /* LOADPARM */ 1288 /* check if read scp info worked and set loadparm */ 1289 if (sclp_ipl_info.is_valid) 1290 memcpy(ipb->ccw.loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN); 1291 else 1292 /* read scp info failed: set empty loadparm (EBCDIC blanks) */ 1293 memset(ipb->ccw.loadparm, 0x40, LOADPARM_LEN); 1294 ipb->ccw.flags = IPL_PB0_FLAG_LOADPARM; 1295 1296 /* VM PARM */ 1297 if (machine_is_vm() && ipl_block_valid && 1298 (ipl_block.ccw.vm_flags & IPL_PB0_CCW_VM_FLAG_VP)) { 1299 1300 ipb->ccw.vm_flags |= IPL_PB0_CCW_VM_FLAG_VP; 1301 ipb->ccw.vm_parm_len = ipl_block.ccw.vm_parm_len; 1302 memcpy(ipb->ccw.vm_parm, 1303 ipl_block.ccw.vm_parm, DIAG308_VMPARM_SIZE); 1304 } 1305 } 1306 1307 static int __init reipl_nss_init(void) 1308 { 1309 int rc; 1310 1311 if (!machine_is_vm()) 1312 return 0; 1313 1314 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL); 1315 if (!reipl_block_nss) 1316 return -ENOMEM; 1317 1318 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group); 1319 if (rc) 1320 return rc; 1321 1322 reipl_block_ccw_init(reipl_block_nss); 1323 reipl_capabilities |= IPL_TYPE_NSS; 1324 return 0; 1325 } 1326 1327 static int __init reipl_ccw_init(void) 1328 { 1329 int rc; 1330 1331 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL); 1332 if (!reipl_block_ccw) 1333 return -ENOMEM; 1334 1335 rc = sysfs_create_group(&reipl_kset->kobj, 1336 machine_is_vm() ? &reipl_ccw_attr_group_vm 1337 : &reipl_ccw_attr_group_lpar); 1338 if (rc) 1339 return rc; 1340 1341 reipl_block_ccw_init(reipl_block_ccw); 1342 if (ipl_info.type == IPL_TYPE_CCW) { 1343 reipl_block_ccw->ccw.ssid = ipl_block.ccw.ssid; 1344 reipl_block_ccw->ccw.devno = ipl_block.ccw.devno; 1345 reipl_block_ccw_fill_parms(reipl_block_ccw); 1346 } 1347 1348 reipl_capabilities |= IPL_TYPE_CCW; 1349 return 0; 1350 } 1351 1352 static int __init reipl_fcp_init(void) 1353 { 1354 int rc; 1355 1356 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL); 1357 if (!reipl_block_fcp) 1358 return -ENOMEM; 1359 1360 /* sysfs: create fcp kset for mixing attr group and bin attrs */ 1361 reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL, 1362 &reipl_kset->kobj); 1363 if (!reipl_fcp_kset) { 1364 free_page((unsigned long) reipl_block_fcp); 1365 return -ENOMEM; 1366 } 1367 1368 rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group); 1369 if (rc) 1370 goto out1; 1371 1372 if (test_facility(141)) { 1373 rc = sysfs_create_file(&reipl_fcp_kset->kobj, 1374 &sys_reipl_fcp_clear_attr.attr); 1375 if (rc) 1376 goto out2; 1377 } else { 1378 reipl_fcp_clear = true; 1379 } 1380 1381 if (ipl_info.type == IPL_TYPE_FCP) { 1382 memcpy(reipl_block_fcp, &ipl_block, sizeof(ipl_block)); 1383 /* 1384 * Fix loadparm: There are systems where the (SCSI) LOADPARM 1385 * is invalid in the SCSI IPL parameter block, so take it 1386 * always from sclp_ipl_info. 1387 */ 1388 memcpy(reipl_block_fcp->fcp.loadparm, sclp_ipl_info.loadparm, 1389 LOADPARM_LEN); 1390 } else { 1391 reipl_block_fcp->hdr.len = IPL_BP_FCP_LEN; 1392 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION; 1393 reipl_block_fcp->fcp.len = IPL_BP0_FCP_LEN; 1394 reipl_block_fcp->fcp.pbt = IPL_PBT_FCP; 1395 reipl_block_fcp->fcp.opt = IPL_PB0_FCP_OPT_IPL; 1396 } 1397 reipl_capabilities |= IPL_TYPE_FCP; 1398 return 0; 1399 1400 out2: 1401 sysfs_remove_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group); 1402 out1: 1403 kset_unregister(reipl_fcp_kset); 1404 free_page((unsigned long) reipl_block_fcp); 1405 return rc; 1406 } 1407 1408 static int __init reipl_nvme_init(void) 1409 { 1410 int rc; 1411 1412 reipl_block_nvme = (void *) get_zeroed_page(GFP_KERNEL); 1413 if (!reipl_block_nvme) 1414 return -ENOMEM; 1415 1416 /* sysfs: create kset for mixing attr group and bin attrs */ 1417 reipl_nvme_kset = kset_create_and_add(IPL_NVME_STR, NULL, 1418 &reipl_kset->kobj); 1419 if (!reipl_nvme_kset) { 1420 free_page((unsigned long) reipl_block_nvme); 1421 return -ENOMEM; 1422 } 1423 1424 rc = sysfs_create_group(&reipl_nvme_kset->kobj, &reipl_nvme_attr_group); 1425 if (rc) 1426 goto out1; 1427 1428 if (test_facility(141)) { 1429 rc = sysfs_create_file(&reipl_nvme_kset->kobj, 1430 &sys_reipl_nvme_clear_attr.attr); 1431 if (rc) 1432 goto out2; 1433 } else { 1434 reipl_nvme_clear = true; 1435 } 1436 1437 if (ipl_info.type == IPL_TYPE_NVME) { 1438 memcpy(reipl_block_nvme, &ipl_block, sizeof(ipl_block)); 1439 /* 1440 * Fix loadparm: There are systems where the (SCSI) LOADPARM 1441 * is invalid in the IPL parameter block, so take it 1442 * always from sclp_ipl_info. 1443 */ 1444 memcpy(reipl_block_nvme->nvme.loadparm, sclp_ipl_info.loadparm, 1445 LOADPARM_LEN); 1446 } else { 1447 reipl_block_nvme->hdr.len = IPL_BP_NVME_LEN; 1448 reipl_block_nvme->hdr.version = IPL_PARM_BLOCK_VERSION; 1449 reipl_block_nvme->nvme.len = IPL_BP0_NVME_LEN; 1450 reipl_block_nvme->nvme.pbt = IPL_PBT_NVME; 1451 reipl_block_nvme->nvme.opt = IPL_PB0_NVME_OPT_IPL; 1452 } 1453 reipl_capabilities |= IPL_TYPE_NVME; 1454 return 0; 1455 1456 out2: 1457 sysfs_remove_group(&reipl_nvme_kset->kobj, &reipl_nvme_attr_group); 1458 out1: 1459 kset_unregister(reipl_nvme_kset); 1460 free_page((unsigned long) reipl_block_nvme); 1461 return rc; 1462 } 1463 1464 static int __init reipl_eckd_init(void) 1465 { 1466 int rc; 1467 1468 if (!sclp.has_sipl_eckd) 1469 return 0; 1470 1471 reipl_block_eckd = (void *)get_zeroed_page(GFP_KERNEL); 1472 if (!reipl_block_eckd) 1473 return -ENOMEM; 1474 1475 /* sysfs: create kset for mixing attr group and bin attrs */ 1476 reipl_eckd_kset = kset_create_and_add(IPL_ECKD_STR, NULL, 1477 &reipl_kset->kobj); 1478 if (!reipl_eckd_kset) { 1479 free_page((unsigned long)reipl_block_eckd); 1480 return -ENOMEM; 1481 } 1482 1483 rc = sysfs_create_group(&reipl_eckd_kset->kobj, &reipl_eckd_attr_group); 1484 if (rc) 1485 goto out1; 1486 1487 if (test_facility(141)) { 1488 rc = sysfs_create_file(&reipl_eckd_kset->kobj, 1489 &sys_reipl_eckd_clear_attr.attr); 1490 if (rc) 1491 goto out2; 1492 } else { 1493 reipl_eckd_clear = true; 1494 } 1495 1496 if (ipl_info.type == IPL_TYPE_ECKD) { 1497 memcpy(reipl_block_eckd, &ipl_block, sizeof(ipl_block)); 1498 } else { 1499 reipl_block_eckd->hdr.len = IPL_BP_ECKD_LEN; 1500 reipl_block_eckd->hdr.version = IPL_PARM_BLOCK_VERSION; 1501 reipl_block_eckd->eckd.len = IPL_BP0_ECKD_LEN; 1502 reipl_block_eckd->eckd.pbt = IPL_PBT_ECKD; 1503 reipl_block_eckd->eckd.opt = IPL_PB0_ECKD_OPT_IPL; 1504 } 1505 reipl_capabilities |= IPL_TYPE_ECKD; 1506 return 0; 1507 1508 out2: 1509 sysfs_remove_group(&reipl_eckd_kset->kobj, &reipl_eckd_attr_group); 1510 out1: 1511 kset_unregister(reipl_eckd_kset); 1512 free_page((unsigned long)reipl_block_eckd); 1513 return rc; 1514 } 1515 1516 static int __init reipl_type_init(void) 1517 { 1518 enum ipl_type reipl_type = ipl_info.type; 1519 struct ipl_parameter_block *reipl_block; 1520 unsigned long size; 1521 1522 reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size); 1523 if (!reipl_block) 1524 goto out; 1525 /* 1526 * If we have an OS info reipl block, this will be used 1527 */ 1528 if (reipl_block->pb0_hdr.pbt == IPL_PBT_FCP) { 1529 memcpy(reipl_block_fcp, reipl_block, size); 1530 reipl_type = IPL_TYPE_FCP; 1531 } else if (reipl_block->pb0_hdr.pbt == IPL_PBT_NVME) { 1532 memcpy(reipl_block_nvme, reipl_block, size); 1533 reipl_type = IPL_TYPE_NVME; 1534 } else if (reipl_block->pb0_hdr.pbt == IPL_PBT_CCW) { 1535 memcpy(reipl_block_ccw, reipl_block, size); 1536 reipl_type = IPL_TYPE_CCW; 1537 } else if (reipl_block->pb0_hdr.pbt == IPL_PBT_ECKD) { 1538 memcpy(reipl_block_eckd, reipl_block, size); 1539 reipl_type = IPL_TYPE_ECKD; 1540 } 1541 out: 1542 return reipl_set_type(reipl_type); 1543 } 1544 1545 static int __init reipl_init(void) 1546 { 1547 int rc; 1548 1549 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj); 1550 if (!reipl_kset) 1551 return -ENOMEM; 1552 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr); 1553 if (rc) { 1554 kset_unregister(reipl_kset); 1555 return rc; 1556 } 1557 rc = reipl_ccw_init(); 1558 if (rc) 1559 return rc; 1560 rc = reipl_eckd_init(); 1561 if (rc) 1562 return rc; 1563 rc = reipl_fcp_init(); 1564 if (rc) 1565 return rc; 1566 rc = reipl_nvme_init(); 1567 if (rc) 1568 return rc; 1569 rc = reipl_nss_init(); 1570 if (rc) 1571 return rc; 1572 return reipl_type_init(); 1573 } 1574 1575 static struct shutdown_action __refdata reipl_action = { 1576 .name = SHUTDOWN_ACTION_REIPL_STR, 1577 .fn = reipl_run, 1578 .init = reipl_init, 1579 }; 1580 1581 /* 1582 * dump shutdown action: Dump Linux on shutdown. 1583 */ 1584 1585 /* FCP dump device attributes */ 1586 1587 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n", 1588 dump_block_fcp->fcp.wwpn); 1589 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n", 1590 dump_block_fcp->fcp.lun); 1591 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n", 1592 dump_block_fcp->fcp.br_lba); 1593 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n", 1594 dump_block_fcp->fcp.devno); 1595 DEFINE_IPL_ATTR_BOOTPROG_RW(dump_fcp, bootprog, "%lld\n", "%lld\n", 1596 dump_block_fcp->hdr, 1597 dump_block_fcp->fcp.bootprog); 1598 1599 DEFINE_IPL_ATTR_SCP_DATA_RW(dump_fcp, dump_block_fcp->hdr, 1600 dump_block_fcp->fcp, 1601 IPL_BP_FCP_LEN, IPL_BP0_FCP_LEN, 1602 DIAG308_SCPDATA_SIZE); 1603 1604 static struct attribute *dump_fcp_attrs[] = { 1605 &sys_dump_fcp_device_attr.attr, 1606 &sys_dump_fcp_wwpn_attr.attr, 1607 &sys_dump_fcp_lun_attr.attr, 1608 &sys_dump_fcp_bootprog_attr.attr, 1609 &sys_dump_fcp_br_lba_attr.attr, 1610 NULL, 1611 }; 1612 1613 static const struct bin_attribute *const dump_fcp_bin_attrs[] = { 1614 &sys_dump_fcp_scp_data_attr, 1615 NULL, 1616 }; 1617 1618 static const struct attribute_group dump_fcp_attr_group = { 1619 .name = IPL_FCP_STR, 1620 .attrs = dump_fcp_attrs, 1621 .bin_attrs = dump_fcp_bin_attrs, 1622 }; 1623 1624 /* NVME dump device attributes */ 1625 DEFINE_IPL_ATTR_RW(dump_nvme, fid, "0x%08llx\n", "%llx\n", 1626 dump_block_nvme->nvme.fid); 1627 DEFINE_IPL_ATTR_RW(dump_nvme, nsid, "0x%08llx\n", "%llx\n", 1628 dump_block_nvme->nvme.nsid); 1629 DEFINE_IPL_ATTR_RW(dump_nvme, br_lba, "%lld\n", "%llx\n", 1630 dump_block_nvme->nvme.br_lba); 1631 DEFINE_IPL_ATTR_BOOTPROG_RW(dump_nvme, bootprog, "%lld\n", "%llx\n", 1632 dump_block_nvme->hdr, 1633 dump_block_nvme->nvme.bootprog); 1634 1635 DEFINE_IPL_ATTR_SCP_DATA_RW(dump_nvme, dump_block_nvme->hdr, 1636 dump_block_nvme->nvme, 1637 IPL_BP_NVME_LEN, IPL_BP0_NVME_LEN, 1638 DIAG308_SCPDATA_SIZE); 1639 1640 static struct attribute *dump_nvme_attrs[] = { 1641 &sys_dump_nvme_fid_attr.attr, 1642 &sys_dump_nvme_nsid_attr.attr, 1643 &sys_dump_nvme_bootprog_attr.attr, 1644 &sys_dump_nvme_br_lba_attr.attr, 1645 NULL, 1646 }; 1647 1648 static const struct bin_attribute *const dump_nvme_bin_attrs[] = { 1649 &sys_dump_nvme_scp_data_attr, 1650 NULL, 1651 }; 1652 1653 static const struct attribute_group dump_nvme_attr_group = { 1654 .name = IPL_NVME_STR, 1655 .attrs = dump_nvme_attrs, 1656 .bin_attrs = dump_nvme_bin_attrs, 1657 }; 1658 1659 /* ECKD dump device attributes */ 1660 DEFINE_IPL_CCW_ATTR_RW(dump_eckd, device, dump_block_eckd->eckd); 1661 DEFINE_IPL_ATTR_BOOTPROG_RW(dump_eckd, bootprog, "%lld\n", "%llx\n", 1662 dump_block_eckd->hdr, 1663 dump_block_eckd->eckd.bootprog); 1664 1665 IPL_ATTR_BR_CHR_SHOW_FN(dump, dump_block_eckd->eckd); 1666 IPL_ATTR_BR_CHR_STORE_FN(dump, dump_block_eckd->eckd); 1667 1668 static struct kobj_attribute sys_dump_eckd_br_chr_attr = 1669 __ATTR(br_chr, 0644, eckd_dump_br_chr_show, eckd_dump_br_chr_store); 1670 1671 DEFINE_IPL_ATTR_SCP_DATA_RW(dump_eckd, dump_block_eckd->hdr, 1672 dump_block_eckd->eckd, 1673 IPL_BP_ECKD_LEN, IPL_BP0_ECKD_LEN, 1674 DIAG308_SCPDATA_SIZE); 1675 1676 static struct attribute *dump_eckd_attrs[] = { 1677 &sys_dump_eckd_device_attr.attr, 1678 &sys_dump_eckd_bootprog_attr.attr, 1679 &sys_dump_eckd_br_chr_attr.attr, 1680 NULL, 1681 }; 1682 1683 static const struct bin_attribute *const dump_eckd_bin_attrs[] = { 1684 &sys_dump_eckd_scp_data_attr, 1685 NULL, 1686 }; 1687 1688 static const struct attribute_group dump_eckd_attr_group = { 1689 .name = IPL_ECKD_STR, 1690 .attrs = dump_eckd_attrs, 1691 .bin_attrs = dump_eckd_bin_attrs, 1692 }; 1693 1694 /* CCW dump device attributes */ 1695 DEFINE_IPL_CCW_ATTR_RW(dump_ccw, device, dump_block_ccw->ccw); 1696 1697 static struct attribute *dump_ccw_attrs[] = { 1698 &sys_dump_ccw_device_attr.attr, 1699 NULL, 1700 }; 1701 1702 static struct attribute_group dump_ccw_attr_group = { 1703 .name = IPL_CCW_STR, 1704 .attrs = dump_ccw_attrs, 1705 }; 1706 1707 /* dump type */ 1708 1709 static int dump_set_type(enum dump_type type) 1710 { 1711 if (!(dump_capabilities & type)) 1712 return -EINVAL; 1713 dump_type = type; 1714 return 0; 1715 } 1716 1717 static ssize_t dump_type_show(struct kobject *kobj, 1718 struct kobj_attribute *attr, char *page) 1719 { 1720 return sysfs_emit(page, "%s\n", dump_type_str(dump_type)); 1721 } 1722 1723 static ssize_t dump_type_store(struct kobject *kobj, 1724 struct kobj_attribute *attr, 1725 const char *buf, size_t len) 1726 { 1727 int rc = -EINVAL; 1728 1729 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0) 1730 rc = dump_set_type(DUMP_TYPE_NONE); 1731 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0) 1732 rc = dump_set_type(DUMP_TYPE_CCW); 1733 else if (strncmp(buf, DUMP_ECKD_STR, strlen(DUMP_ECKD_STR)) == 0) 1734 rc = dump_set_type(DUMP_TYPE_ECKD); 1735 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0) 1736 rc = dump_set_type(DUMP_TYPE_FCP); 1737 else if (strncmp(buf, DUMP_NVME_STR, strlen(DUMP_NVME_STR)) == 0) 1738 rc = dump_set_type(DUMP_TYPE_NVME); 1739 return (rc != 0) ? rc : len; 1740 } 1741 1742 static struct kobj_attribute dump_type_attr = 1743 __ATTR(dump_type, 0644, dump_type_show, dump_type_store); 1744 1745 static ssize_t dump_area_size_show(struct kobject *kobj, 1746 struct kobj_attribute *attr, char *page) 1747 { 1748 return sysfs_emit(page, "%lu\n", sclp.hsa_size); 1749 } 1750 1751 static struct kobj_attribute dump_area_size_attr = __ATTR_RO(dump_area_size); 1752 1753 static struct attribute *dump_attrs[] = { 1754 &dump_type_attr.attr, 1755 &dump_area_size_attr.attr, 1756 NULL, 1757 }; 1758 1759 static struct attribute_group dump_attr_group = { 1760 .attrs = dump_attrs, 1761 }; 1762 1763 static struct kset *dump_kset; 1764 1765 static void diag308_dump(void *dump_block) 1766 { 1767 diag308(DIAG308_SET, dump_block); 1768 while (1) { 1769 if (diag308(DIAG308_LOAD_NORMAL_DUMP, NULL) != 0x302) 1770 break; 1771 udelay(USEC_PER_SEC); 1772 } 1773 } 1774 1775 static void __dump_run(void *unused) 1776 { 1777 switch (dump_type) { 1778 case DUMP_TYPE_CCW: 1779 diag308_dump(dump_block_ccw); 1780 break; 1781 case DUMP_TYPE_ECKD: 1782 diag308_dump(dump_block_eckd); 1783 break; 1784 case DUMP_TYPE_FCP: 1785 diag308_dump(dump_block_fcp); 1786 break; 1787 case DUMP_TYPE_NVME: 1788 diag308_dump(dump_block_nvme); 1789 break; 1790 default: 1791 break; 1792 } 1793 } 1794 1795 static void dump_run(struct shutdown_trigger *trigger) 1796 { 1797 if (dump_type == DUMP_TYPE_NONE) 1798 return; 1799 smp_send_stop(); 1800 smp_call_ipl_cpu(__dump_run, NULL); 1801 } 1802 1803 static int __init dump_ccw_init(void) 1804 { 1805 int rc; 1806 1807 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL); 1808 if (!dump_block_ccw) 1809 return -ENOMEM; 1810 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group); 1811 if (rc) { 1812 free_page((unsigned long)dump_block_ccw); 1813 return rc; 1814 } 1815 dump_block_ccw->hdr.len = IPL_BP_CCW_LEN; 1816 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION; 1817 dump_block_ccw->ccw.len = IPL_BP0_CCW_LEN; 1818 dump_block_ccw->ccw.pbt = IPL_PBT_CCW; 1819 dump_capabilities |= DUMP_TYPE_CCW; 1820 return 0; 1821 } 1822 1823 static int __init dump_fcp_init(void) 1824 { 1825 int rc; 1826 1827 if (!sclp_ipl_info.has_dump) 1828 return 0; /* LDIPL DUMP is not installed */ 1829 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL); 1830 if (!dump_block_fcp) 1831 return -ENOMEM; 1832 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group); 1833 if (rc) { 1834 free_page((unsigned long)dump_block_fcp); 1835 return rc; 1836 } 1837 dump_block_fcp->hdr.len = IPL_BP_FCP_LEN; 1838 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION; 1839 dump_block_fcp->fcp.len = IPL_BP0_FCP_LEN; 1840 dump_block_fcp->fcp.pbt = IPL_PBT_FCP; 1841 dump_block_fcp->fcp.opt = IPL_PB0_FCP_OPT_DUMP; 1842 dump_capabilities |= DUMP_TYPE_FCP; 1843 return 0; 1844 } 1845 1846 static int __init dump_nvme_init(void) 1847 { 1848 int rc; 1849 1850 if (!sclp_ipl_info.has_dump) 1851 return 0; /* LDIPL DUMP is not installed */ 1852 dump_block_nvme = (void *) get_zeroed_page(GFP_KERNEL); 1853 if (!dump_block_nvme) 1854 return -ENOMEM; 1855 rc = sysfs_create_group(&dump_kset->kobj, &dump_nvme_attr_group); 1856 if (rc) { 1857 free_page((unsigned long)dump_block_nvme); 1858 return rc; 1859 } 1860 dump_block_nvme->hdr.len = IPL_BP_NVME_LEN; 1861 dump_block_nvme->hdr.version = IPL_PARM_BLOCK_VERSION; 1862 dump_block_nvme->nvme.len = IPL_BP0_NVME_LEN; 1863 dump_block_nvme->nvme.pbt = IPL_PBT_NVME; 1864 dump_block_nvme->nvme.opt = IPL_PB0_NVME_OPT_DUMP; 1865 dump_capabilities |= DUMP_TYPE_NVME; 1866 return 0; 1867 } 1868 1869 static int __init dump_eckd_init(void) 1870 { 1871 int rc; 1872 1873 if (!sclp_ipl_info.has_dump || !sclp.has_sipl_eckd) 1874 return 0; /* LDIPL DUMP is not installed */ 1875 dump_block_eckd = (void *)get_zeroed_page(GFP_KERNEL); 1876 if (!dump_block_eckd) 1877 return -ENOMEM; 1878 rc = sysfs_create_group(&dump_kset->kobj, &dump_eckd_attr_group); 1879 if (rc) { 1880 free_page((unsigned long)dump_block_eckd); 1881 return rc; 1882 } 1883 dump_block_eckd->hdr.len = IPL_BP_ECKD_LEN; 1884 dump_block_eckd->hdr.version = IPL_PARM_BLOCK_VERSION; 1885 dump_block_eckd->eckd.len = IPL_BP0_ECKD_LEN; 1886 dump_block_eckd->eckd.pbt = IPL_PBT_ECKD; 1887 dump_block_eckd->eckd.opt = IPL_PB0_ECKD_OPT_DUMP; 1888 dump_capabilities |= DUMP_TYPE_ECKD; 1889 return 0; 1890 } 1891 1892 static int __init dump_init(void) 1893 { 1894 int rc; 1895 1896 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj); 1897 if (!dump_kset) 1898 return -ENOMEM; 1899 rc = sysfs_create_group(&dump_kset->kobj, &dump_attr_group); 1900 if (rc) { 1901 kset_unregister(dump_kset); 1902 return rc; 1903 } 1904 rc = dump_ccw_init(); 1905 if (rc) 1906 return rc; 1907 rc = dump_eckd_init(); 1908 if (rc) 1909 return rc; 1910 rc = dump_fcp_init(); 1911 if (rc) 1912 return rc; 1913 rc = dump_nvme_init(); 1914 if (rc) 1915 return rc; 1916 dump_set_type(DUMP_TYPE_NONE); 1917 return 0; 1918 } 1919 1920 static struct shutdown_action __refdata dump_action = { 1921 .name = SHUTDOWN_ACTION_DUMP_STR, 1922 .fn = dump_run, 1923 .init = dump_init, 1924 }; 1925 1926 static void dump_reipl_run(struct shutdown_trigger *trigger) 1927 { 1928 struct lowcore *abs_lc; 1929 unsigned int csum; 1930 1931 /* 1932 * Set REIPL_CLEAR flag in os_info flags entry indicating 1933 * 'clear' sysfs attribute has been set on the panicked system 1934 * for specified reipl type. 1935 * Always set for IPL_TYPE_NSS and IPL_TYPE_UNKNOWN. 1936 */ 1937 if ((reipl_type == IPL_TYPE_CCW && reipl_ccw_clear) || 1938 (reipl_type == IPL_TYPE_ECKD && reipl_eckd_clear) || 1939 (reipl_type == IPL_TYPE_FCP && reipl_fcp_clear) || 1940 (reipl_type == IPL_TYPE_NVME && reipl_nvme_clear) || 1941 reipl_type == IPL_TYPE_NSS || 1942 reipl_type == IPL_TYPE_UNKNOWN) 1943 os_info_flags |= OS_INFO_FLAG_REIPL_CLEAR; 1944 os_info_entry_add_data(OS_INFO_FLAGS_ENTRY, &os_info_flags, sizeof(os_info_flags)); 1945 csum = (__force unsigned int)cksm(reipl_block_actual, reipl_block_actual->hdr.len, 0); 1946 abs_lc = get_abs_lowcore(); 1947 abs_lc->ipib = __pa(reipl_block_actual); 1948 abs_lc->ipib_checksum = csum; 1949 put_abs_lowcore(abs_lc); 1950 dump_run(trigger); 1951 } 1952 1953 static struct shutdown_action __refdata dump_reipl_action = { 1954 .name = SHUTDOWN_ACTION_DUMP_REIPL_STR, 1955 .fn = dump_reipl_run, 1956 }; 1957 1958 /* 1959 * vmcmd shutdown action: Trigger vm command on shutdown. 1960 */ 1961 1962 #define VMCMD_MAX_SIZE 240 1963 1964 static char vmcmd_on_reboot[VMCMD_MAX_SIZE + 1]; 1965 static char vmcmd_on_panic[VMCMD_MAX_SIZE + 1]; 1966 static char vmcmd_on_halt[VMCMD_MAX_SIZE + 1]; 1967 static char vmcmd_on_poff[VMCMD_MAX_SIZE + 1]; 1968 static char vmcmd_on_restart[VMCMD_MAX_SIZE + 1]; 1969 1970 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot); 1971 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic); 1972 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt); 1973 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff); 1974 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart); 1975 1976 static struct attribute *vmcmd_attrs[] = { 1977 &sys_vmcmd_on_reboot_attr.attr, 1978 &sys_vmcmd_on_panic_attr.attr, 1979 &sys_vmcmd_on_halt_attr.attr, 1980 &sys_vmcmd_on_poff_attr.attr, 1981 &sys_vmcmd_on_restart_attr.attr, 1982 NULL, 1983 }; 1984 1985 static struct attribute_group vmcmd_attr_group = { 1986 .attrs = vmcmd_attrs, 1987 }; 1988 1989 static struct kset *vmcmd_kset; 1990 1991 static void vmcmd_run(struct shutdown_trigger *trigger) 1992 { 1993 char *cmd; 1994 1995 if (strcmp(trigger->name, ON_REIPL_STR) == 0) 1996 cmd = vmcmd_on_reboot; 1997 else if (strcmp(trigger->name, ON_PANIC_STR) == 0) 1998 cmd = vmcmd_on_panic; 1999 else if (strcmp(trigger->name, ON_HALT_STR) == 0) 2000 cmd = vmcmd_on_halt; 2001 else if (strcmp(trigger->name, ON_POFF_STR) == 0) 2002 cmd = vmcmd_on_poff; 2003 else if (strcmp(trigger->name, ON_RESTART_STR) == 0) 2004 cmd = vmcmd_on_restart; 2005 else 2006 return; 2007 2008 if (strlen(cmd) == 0) 2009 return; 2010 __cpcmd(cmd, NULL, 0, NULL); 2011 } 2012 2013 static int vmcmd_init(void) 2014 { 2015 if (!machine_is_vm()) 2016 return -EOPNOTSUPP; 2017 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj); 2018 if (!vmcmd_kset) 2019 return -ENOMEM; 2020 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group); 2021 } 2022 2023 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR, 2024 vmcmd_run, vmcmd_init}; 2025 2026 /* 2027 * stop shutdown action: Stop Linux on shutdown. 2028 */ 2029 2030 static void stop_run(struct shutdown_trigger *trigger) 2031 { 2032 if (strcmp(trigger->name, ON_PANIC_STR) == 0 || 2033 strcmp(trigger->name, ON_RESTART_STR) == 0) 2034 disabled_wait(); 2035 smp_stop_cpu(); 2036 } 2037 2038 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR, 2039 stop_run, NULL}; 2040 2041 /* action list */ 2042 2043 static struct shutdown_action *shutdown_actions_list[] = { 2044 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action, 2045 &vmcmd_action, &stop_action}; 2046 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *)) 2047 2048 /* 2049 * Trigger section 2050 */ 2051 2052 static struct kset *shutdown_actions_kset; 2053 2054 static int set_trigger(const char *buf, struct shutdown_trigger *trigger, 2055 size_t len) 2056 { 2057 int i; 2058 2059 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) { 2060 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) { 2061 if (shutdown_actions_list[i]->init_rc) { 2062 return shutdown_actions_list[i]->init_rc; 2063 } else { 2064 trigger->action = shutdown_actions_list[i]; 2065 return len; 2066 } 2067 } 2068 } 2069 return -EINVAL; 2070 } 2071 2072 /* on reipl */ 2073 2074 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR, 2075 &reipl_action}; 2076 2077 static ssize_t on_reboot_show(struct kobject *kobj, 2078 struct kobj_attribute *attr, char *page) 2079 { 2080 return sysfs_emit(page, "%s\n", on_reboot_trigger.action->name); 2081 } 2082 2083 static ssize_t on_reboot_store(struct kobject *kobj, 2084 struct kobj_attribute *attr, 2085 const char *buf, size_t len) 2086 { 2087 return set_trigger(buf, &on_reboot_trigger, len); 2088 } 2089 static struct kobj_attribute on_reboot_attr = __ATTR_RW(on_reboot); 2090 2091 static void do_machine_restart(char *__unused) 2092 { 2093 smp_send_stop(); 2094 on_reboot_trigger.action->fn(&on_reboot_trigger); 2095 reipl_run(NULL); 2096 } 2097 void (*_machine_restart)(char *command) = do_machine_restart; 2098 2099 /* on panic */ 2100 2101 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action}; 2102 2103 static ssize_t on_panic_show(struct kobject *kobj, 2104 struct kobj_attribute *attr, char *page) 2105 { 2106 return sysfs_emit(page, "%s\n", on_panic_trigger.action->name); 2107 } 2108 2109 static ssize_t on_panic_store(struct kobject *kobj, 2110 struct kobj_attribute *attr, 2111 const char *buf, size_t len) 2112 { 2113 return set_trigger(buf, &on_panic_trigger, len); 2114 } 2115 static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic); 2116 2117 static void do_panic(void) 2118 { 2119 lgr_info_log(); 2120 on_panic_trigger.action->fn(&on_panic_trigger); 2121 stop_run(&on_panic_trigger); 2122 } 2123 2124 /* on restart */ 2125 2126 static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR, 2127 &stop_action}; 2128 2129 static ssize_t on_restart_show(struct kobject *kobj, 2130 struct kobj_attribute *attr, char *page) 2131 { 2132 return sysfs_emit(page, "%s\n", on_restart_trigger.action->name); 2133 } 2134 2135 static ssize_t on_restart_store(struct kobject *kobj, 2136 struct kobj_attribute *attr, 2137 const char *buf, size_t len) 2138 { 2139 return set_trigger(buf, &on_restart_trigger, len); 2140 } 2141 static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart); 2142 2143 static void __do_restart(void *ignore) 2144 { 2145 smp_send_stop(); 2146 #ifdef CONFIG_CRASH_DUMP 2147 crash_kexec(NULL); 2148 #endif 2149 on_restart_trigger.action->fn(&on_restart_trigger); 2150 stop_run(&on_restart_trigger); 2151 } 2152 2153 void do_restart(void *arg) 2154 { 2155 tracing_off(); 2156 debug_locks_off(); 2157 lgr_info_log(); 2158 smp_call_ipl_cpu(__do_restart, arg); 2159 } 2160 2161 /* on halt */ 2162 2163 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action}; 2164 2165 static ssize_t on_halt_show(struct kobject *kobj, 2166 struct kobj_attribute *attr, char *page) 2167 { 2168 return sysfs_emit(page, "%s\n", on_halt_trigger.action->name); 2169 } 2170 2171 static ssize_t on_halt_store(struct kobject *kobj, 2172 struct kobj_attribute *attr, 2173 const char *buf, size_t len) 2174 { 2175 return set_trigger(buf, &on_halt_trigger, len); 2176 } 2177 static struct kobj_attribute on_halt_attr = __ATTR_RW(on_halt); 2178 2179 static void do_machine_halt(void) 2180 { 2181 smp_send_stop(); 2182 on_halt_trigger.action->fn(&on_halt_trigger); 2183 stop_run(&on_halt_trigger); 2184 } 2185 void (*_machine_halt)(void) = do_machine_halt; 2186 2187 /* on power off */ 2188 2189 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action}; 2190 2191 static ssize_t on_poff_show(struct kobject *kobj, 2192 struct kobj_attribute *attr, char *page) 2193 { 2194 return sysfs_emit(page, "%s\n", on_poff_trigger.action->name); 2195 } 2196 2197 static ssize_t on_poff_store(struct kobject *kobj, 2198 struct kobj_attribute *attr, 2199 const char *buf, size_t len) 2200 { 2201 return set_trigger(buf, &on_poff_trigger, len); 2202 } 2203 static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff); 2204 2205 static void do_machine_power_off(void) 2206 { 2207 smp_send_stop(); 2208 on_poff_trigger.action->fn(&on_poff_trigger); 2209 stop_run(&on_poff_trigger); 2210 } 2211 void (*_machine_power_off)(void) = do_machine_power_off; 2212 2213 static struct attribute *shutdown_action_attrs[] = { 2214 &on_restart_attr.attr, 2215 &on_reboot_attr.attr, 2216 &on_panic_attr.attr, 2217 &on_halt_attr.attr, 2218 &on_poff_attr.attr, 2219 NULL, 2220 }; 2221 2222 static struct attribute_group shutdown_action_attr_group = { 2223 .attrs = shutdown_action_attrs, 2224 }; 2225 2226 static void __init shutdown_triggers_init(void) 2227 { 2228 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL, 2229 firmware_kobj); 2230 if (!shutdown_actions_kset) 2231 goto fail; 2232 if (sysfs_create_group(&shutdown_actions_kset->kobj, 2233 &shutdown_action_attr_group)) 2234 goto fail; 2235 return; 2236 fail: 2237 panic("shutdown_triggers_init failed\n"); 2238 } 2239 2240 static void __init shutdown_actions_init(void) 2241 { 2242 int i; 2243 2244 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) { 2245 if (!shutdown_actions_list[i]->init) 2246 continue; 2247 shutdown_actions_list[i]->init_rc = 2248 shutdown_actions_list[i]->init(); 2249 } 2250 } 2251 2252 static int __init s390_ipl_init(void) 2253 { 2254 char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40}; 2255 2256 sclp_early_get_ipl_info(&sclp_ipl_info); 2257 /* 2258 * Fix loadparm: There are systems where the (SCSI) LOADPARM 2259 * returned by read SCP info is invalid (contains EBCDIC blanks) 2260 * when the system has been booted via diag308. In that case we use 2261 * the value from diag308, if available. 2262 * 2263 * There are also systems where diag308 store does not work in 2264 * case the system is booted from HMC. Fortunately in this case 2265 * READ SCP info provides the correct value. 2266 */ 2267 if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 && ipl_block_valid) 2268 memcpy(sclp_ipl_info.loadparm, ipl_block.ccw.loadparm, LOADPARM_LEN); 2269 shutdown_actions_init(); 2270 shutdown_triggers_init(); 2271 return 0; 2272 } 2273 2274 __initcall(s390_ipl_init); 2275 2276 static void __init strscpy_skip_quote(char *dst, char *src, int n) 2277 { 2278 int sx, dx; 2279 2280 if (!n) 2281 return; 2282 for (sx = 0, dx = 0; src[sx]; sx++) { 2283 if (src[sx] == '"') 2284 continue; 2285 dst[dx] = src[sx]; 2286 if (dx + 1 == n) 2287 break; 2288 dx++; 2289 } 2290 dst[dx] = '\0'; 2291 } 2292 2293 static int __init vmcmd_on_reboot_setup(char *str) 2294 { 2295 if (!machine_is_vm()) 2296 return 1; 2297 strscpy_skip_quote(vmcmd_on_reboot, str, sizeof(vmcmd_on_reboot)); 2298 on_reboot_trigger.action = &vmcmd_action; 2299 return 1; 2300 } 2301 __setup("vmreboot=", vmcmd_on_reboot_setup); 2302 2303 static int __init vmcmd_on_panic_setup(char *str) 2304 { 2305 if (!machine_is_vm()) 2306 return 1; 2307 strscpy_skip_quote(vmcmd_on_panic, str, sizeof(vmcmd_on_panic)); 2308 on_panic_trigger.action = &vmcmd_action; 2309 return 1; 2310 } 2311 __setup("vmpanic=", vmcmd_on_panic_setup); 2312 2313 static int __init vmcmd_on_halt_setup(char *str) 2314 { 2315 if (!machine_is_vm()) 2316 return 1; 2317 strscpy_skip_quote(vmcmd_on_halt, str, sizeof(vmcmd_on_halt)); 2318 on_halt_trigger.action = &vmcmd_action; 2319 return 1; 2320 } 2321 __setup("vmhalt=", vmcmd_on_halt_setup); 2322 2323 static int __init vmcmd_on_poff_setup(char *str) 2324 { 2325 if (!machine_is_vm()) 2326 return 1; 2327 strscpy_skip_quote(vmcmd_on_poff, str, sizeof(vmcmd_on_poff)); 2328 on_poff_trigger.action = &vmcmd_action; 2329 return 1; 2330 } 2331 __setup("vmpoff=", vmcmd_on_poff_setup); 2332 2333 static int on_panic_notify(struct notifier_block *self, 2334 unsigned long event, void *data) 2335 { 2336 do_panic(); 2337 return NOTIFY_OK; 2338 } 2339 2340 static struct notifier_block on_panic_nb = { 2341 .notifier_call = on_panic_notify, 2342 .priority = INT_MIN, 2343 }; 2344 2345 void __init setup_ipl(void) 2346 { 2347 BUILD_BUG_ON(sizeof(struct ipl_parameter_block) != PAGE_SIZE); 2348 2349 ipl_info.type = get_ipl_type(); 2350 switch (ipl_info.type) { 2351 case IPL_TYPE_CCW: 2352 ipl_info.data.ccw.dev_id.ssid = ipl_block.ccw.ssid; 2353 ipl_info.data.ccw.dev_id.devno = ipl_block.ccw.devno; 2354 break; 2355 case IPL_TYPE_ECKD: 2356 case IPL_TYPE_ECKD_DUMP: 2357 ipl_info.data.eckd.dev_id.ssid = ipl_block.eckd.ssid; 2358 ipl_info.data.eckd.dev_id.devno = ipl_block.eckd.devno; 2359 break; 2360 case IPL_TYPE_FCP: 2361 case IPL_TYPE_FCP_DUMP: 2362 ipl_info.data.fcp.dev_id.ssid = 0; 2363 ipl_info.data.fcp.dev_id.devno = ipl_block.fcp.devno; 2364 ipl_info.data.fcp.wwpn = ipl_block.fcp.wwpn; 2365 ipl_info.data.fcp.lun = ipl_block.fcp.lun; 2366 break; 2367 case IPL_TYPE_NVME: 2368 case IPL_TYPE_NVME_DUMP: 2369 ipl_info.data.nvme.fid = ipl_block.nvme.fid; 2370 ipl_info.data.nvme.nsid = ipl_block.nvme.nsid; 2371 break; 2372 case IPL_TYPE_NSS: 2373 case IPL_TYPE_UNKNOWN: 2374 /* We have no info to copy */ 2375 break; 2376 } 2377 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb); 2378 } 2379 2380 void s390_reset_system(void) 2381 { 2382 /* Disable prefixing */ 2383 set_prefix(0); 2384 2385 /* Disable lowcore protection */ 2386 local_ctl_clear_bit(0, CR0_LOW_ADDRESS_PROTECTION_BIT); 2387 diag_amode31_ops.diag308_reset(); 2388 } 2389 2390 #ifdef CONFIG_KEXEC_FILE 2391 2392 int ipl_report_add_component(struct ipl_report *report, struct kexec_buf *kbuf, 2393 unsigned char flags, unsigned short cert) 2394 { 2395 struct ipl_report_component *comp; 2396 2397 comp = vzalloc(sizeof(*comp)); 2398 if (!comp) 2399 return -ENOMEM; 2400 list_add_tail(&comp->list, &report->components); 2401 2402 comp->entry.addr = kbuf->mem; 2403 comp->entry.len = kbuf->memsz; 2404 comp->entry.flags = flags; 2405 comp->entry.certificate_index = cert; 2406 2407 report->size += sizeof(comp->entry); 2408 2409 return 0; 2410 } 2411 2412 int ipl_report_add_certificate(struct ipl_report *report, void *key, 2413 unsigned long addr, unsigned long len) 2414 { 2415 struct ipl_report_certificate *cert; 2416 2417 cert = vzalloc(sizeof(*cert)); 2418 if (!cert) 2419 return -ENOMEM; 2420 list_add_tail(&cert->list, &report->certificates); 2421 2422 cert->entry.addr = addr; 2423 cert->entry.len = len; 2424 cert->key = key; 2425 2426 report->size += sizeof(cert->entry); 2427 report->size += cert->entry.len; 2428 2429 return 0; 2430 } 2431 2432 struct ipl_report *ipl_report_init(struct ipl_parameter_block *ipib) 2433 { 2434 struct ipl_report *report; 2435 2436 report = vzalloc(sizeof(*report)); 2437 if (!report) 2438 return ERR_PTR(-ENOMEM); 2439 2440 report->ipib = ipib; 2441 INIT_LIST_HEAD(&report->components); 2442 INIT_LIST_HEAD(&report->certificates); 2443 2444 report->size = ALIGN(ipib->hdr.len, 8); 2445 report->size += sizeof(struct ipl_rl_hdr); 2446 report->size += sizeof(struct ipl_rb_components); 2447 report->size += sizeof(struct ipl_rb_certificates); 2448 2449 return report; 2450 } 2451 2452 void *ipl_report_finish(struct ipl_report *report) 2453 { 2454 struct ipl_report_certificate *cert; 2455 struct ipl_report_component *comp; 2456 struct ipl_rb_certificates *certs; 2457 struct ipl_parameter_block *ipib; 2458 struct ipl_rb_components *comps; 2459 struct ipl_rl_hdr *rl_hdr; 2460 void *buf, *ptr; 2461 2462 buf = vzalloc(report->size); 2463 if (!buf) 2464 goto out; 2465 ptr = buf; 2466 2467 memcpy(ptr, report->ipib, report->ipib->hdr.len); 2468 ipib = ptr; 2469 if (ipl_secure_flag) 2470 ipib->hdr.flags |= IPL_PL_FLAG_SIPL; 2471 ipib->hdr.flags |= IPL_PL_FLAG_IPLSR; 2472 ptr += report->ipib->hdr.len; 2473 ptr = PTR_ALIGN(ptr, 8); 2474 2475 rl_hdr = ptr; 2476 ptr += sizeof(*rl_hdr); 2477 2478 comps = ptr; 2479 comps->rbt = IPL_RBT_COMPONENTS; 2480 ptr += sizeof(*comps); 2481 list_for_each_entry(comp, &report->components, list) { 2482 memcpy(ptr, &comp->entry, sizeof(comp->entry)); 2483 ptr += sizeof(comp->entry); 2484 } 2485 comps->len = ptr - (void *)comps; 2486 2487 certs = ptr; 2488 certs->rbt = IPL_RBT_CERTIFICATES; 2489 ptr += sizeof(*certs); 2490 list_for_each_entry(cert, &report->certificates, list) { 2491 memcpy(ptr, &cert->entry, sizeof(cert->entry)); 2492 ptr += sizeof(cert->entry); 2493 } 2494 certs->len = ptr - (void *)certs; 2495 rl_hdr->len = ptr - (void *)rl_hdr; 2496 2497 list_for_each_entry(cert, &report->certificates, list) { 2498 memcpy(ptr, cert->key, cert->entry.len); 2499 ptr += cert->entry.len; 2500 } 2501 2502 BUG_ON(ptr > buf + report->size); 2503 out: 2504 return buf; 2505 } 2506 2507 int ipl_report_free(struct ipl_report *report) 2508 { 2509 struct ipl_report_component *comp, *ncomp; 2510 struct ipl_report_certificate *cert, *ncert; 2511 2512 list_for_each_entry_safe(comp, ncomp, &report->components, list) 2513 vfree(comp); 2514 2515 list_for_each_entry_safe(cert, ncert, &report->certificates, list) 2516 vfree(cert); 2517 2518 vfree(report); 2519 2520 return 0; 2521 } 2522 2523 #endif 2524