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 * Heiko Carstens <heiko.carstens@de.ibm.com> 8 * Volker Sameske <sameske@de.ibm.com> 9 */ 10 11 #include <linux/types.h> 12 #include <linux/export.h> 13 #include <linux/init.h> 14 #include <linux/device.h> 15 #include <linux/delay.h> 16 #include <linux/reboot.h> 17 #include <linux/ctype.h> 18 #include <linux/fs.h> 19 #include <linux/gfp.h> 20 #include <linux/crash_dump.h> 21 #include <linux/debug_locks.h> 22 #include <asm/diag.h> 23 #include <asm/ipl.h> 24 #include <asm/smp.h> 25 #include <asm/setup.h> 26 #include <asm/cpcmd.h> 27 #include <asm/ebcdic.h> 28 #include <asm/sclp.h> 29 #include <asm/checksum.h> 30 #include <asm/debug.h> 31 #include <asm/os_info.h> 32 #include <asm/sections.h> 33 #include <asm/boot_data.h> 34 #include "entry.h" 35 36 #define IPL_PARM_BLOCK_VERSION 0 37 38 #define IPL_UNKNOWN_STR "unknown" 39 #define IPL_CCW_STR "ccw" 40 #define IPL_FCP_STR "fcp" 41 #define IPL_FCP_DUMP_STR "fcp_dump" 42 #define IPL_NVME_STR "nvme" 43 #define IPL_NVME_DUMP_STR "nvme_dump" 44 #define IPL_NSS_STR "nss" 45 46 #define DUMP_CCW_STR "ccw" 47 #define DUMP_FCP_STR "fcp" 48 #define DUMP_NVME_STR "nvme" 49 #define DUMP_NONE_STR "none" 50 51 /* 52 * Four shutdown trigger types are supported: 53 * - panic 54 * - halt 55 * - power off 56 * - reipl 57 * - restart 58 */ 59 #define ON_PANIC_STR "on_panic" 60 #define ON_HALT_STR "on_halt" 61 #define ON_POFF_STR "on_poff" 62 #define ON_REIPL_STR "on_reboot" 63 #define ON_RESTART_STR "on_restart" 64 65 struct shutdown_action; 66 struct shutdown_trigger { 67 char *name; 68 struct shutdown_action *action; 69 }; 70 71 /* 72 * The following shutdown action types are supported: 73 */ 74 #define SHUTDOWN_ACTION_IPL_STR "ipl" 75 #define SHUTDOWN_ACTION_REIPL_STR "reipl" 76 #define SHUTDOWN_ACTION_DUMP_STR "dump" 77 #define SHUTDOWN_ACTION_VMCMD_STR "vmcmd" 78 #define SHUTDOWN_ACTION_STOP_STR "stop" 79 #define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl" 80 81 struct shutdown_action { 82 char *name; 83 void (*fn) (struct shutdown_trigger *trigger); 84 int (*init) (void); 85 int init_rc; 86 }; 87 88 static char *ipl_type_str(enum ipl_type type) 89 { 90 switch (type) { 91 case IPL_TYPE_CCW: 92 return IPL_CCW_STR; 93 case IPL_TYPE_FCP: 94 return IPL_FCP_STR; 95 case IPL_TYPE_FCP_DUMP: 96 return IPL_FCP_DUMP_STR; 97 case IPL_TYPE_NSS: 98 return IPL_NSS_STR; 99 case IPL_TYPE_NVME: 100 return IPL_NVME_STR; 101 case IPL_TYPE_NVME_DUMP: 102 return IPL_NVME_DUMP_STR; 103 case IPL_TYPE_UNKNOWN: 104 default: 105 return IPL_UNKNOWN_STR; 106 } 107 } 108 109 enum dump_type { 110 DUMP_TYPE_NONE = 1, 111 DUMP_TYPE_CCW = 2, 112 DUMP_TYPE_FCP = 4, 113 DUMP_TYPE_NVME = 8, 114 }; 115 116 static char *dump_type_str(enum dump_type type) 117 { 118 switch (type) { 119 case DUMP_TYPE_NONE: 120 return DUMP_NONE_STR; 121 case DUMP_TYPE_CCW: 122 return DUMP_CCW_STR; 123 case DUMP_TYPE_FCP: 124 return DUMP_FCP_STR; 125 case DUMP_TYPE_NVME: 126 return DUMP_NVME_STR; 127 default: 128 return NULL; 129 } 130 } 131 132 int __bootdata_preserved(ipl_block_valid); 133 struct ipl_parameter_block __bootdata_preserved(ipl_block); 134 int __bootdata_preserved(ipl_secure_flag); 135 136 unsigned long __bootdata_preserved(ipl_cert_list_addr); 137 unsigned long __bootdata_preserved(ipl_cert_list_size); 138 139 unsigned long __bootdata(early_ipl_comp_list_addr); 140 unsigned long __bootdata(early_ipl_comp_list_size); 141 142 static int reipl_capabilities = IPL_TYPE_UNKNOWN; 143 144 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN; 145 static struct ipl_parameter_block *reipl_block_fcp; 146 static struct ipl_parameter_block *reipl_block_nvme; 147 static struct ipl_parameter_block *reipl_block_ccw; 148 static struct ipl_parameter_block *reipl_block_nss; 149 static struct ipl_parameter_block *reipl_block_actual; 150 151 static int dump_capabilities = DUMP_TYPE_NONE; 152 static enum dump_type dump_type = DUMP_TYPE_NONE; 153 static struct ipl_parameter_block *dump_block_fcp; 154 static struct ipl_parameter_block *dump_block_nvme; 155 static struct ipl_parameter_block *dump_block_ccw; 156 157 static struct sclp_ipl_info sclp_ipl_info; 158 159 static bool reipl_nvme_clear; 160 static bool reipl_fcp_clear; 161 static bool reipl_ccw_clear; 162 163 static inline int __diag308(unsigned long subcode, void *addr) 164 { 165 union register_pair r1; 166 167 r1.even = (unsigned long) addr; 168 r1.odd = 0; 169 asm volatile( 170 " diag %[r1],%[subcode],0x308\n" 171 "0: nopr %%r7\n" 172 EX_TABLE(0b,0b) 173 : [r1] "+&d" (r1.pair) 174 : [subcode] "d" (subcode) 175 : "cc", "memory"); 176 return r1.odd; 177 } 178 179 int diag308(unsigned long subcode, void *addr) 180 { 181 if (IS_ENABLED(CONFIG_KASAN)) 182 __arch_local_irq_stosm(0x04); /* enable DAT */ 183 diag_stat_inc(DIAG_STAT_X308); 184 return __diag308(subcode, addr); 185 } 186 EXPORT_SYMBOL_GPL(diag308); 187 188 /* SYSFS */ 189 190 #define IPL_ATTR_SHOW_FN(_prefix, _name, _format, args...) \ 191 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \ 192 struct kobj_attribute *attr, \ 193 char *page) \ 194 { \ 195 return scnprintf(page, PAGE_SIZE, _format, ##args); \ 196 } 197 198 #define IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk) \ 199 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \ 200 struct kobj_attribute *attr, \ 201 const char *buf, size_t len) \ 202 { \ 203 unsigned long long ssid, devno; \ 204 \ 205 if (sscanf(buf, "0.%llx.%llx\n", &ssid, &devno) != 2) \ 206 return -EINVAL; \ 207 \ 208 if (ssid > __MAX_SSID || devno > __MAX_SUBCHANNEL) \ 209 return -EINVAL; \ 210 \ 211 _ipl_blk.ssid = ssid; \ 212 _ipl_blk.devno = devno; \ 213 return len; \ 214 } 215 216 #define DEFINE_IPL_CCW_ATTR_RW(_prefix, _name, _ipl_blk) \ 217 IPL_ATTR_SHOW_FN(_prefix, _name, "0.%x.%04x\n", \ 218 _ipl_blk.ssid, _ipl_blk.devno); \ 219 IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk); \ 220 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ 221 __ATTR(_name, (S_IRUGO | S_IWUSR), \ 222 sys_##_prefix##_##_name##_show, \ 223 sys_##_prefix##_##_name##_store) \ 224 225 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \ 226 IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value) \ 227 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ 228 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL) 229 230 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \ 231 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value) \ 232 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \ 233 struct kobj_attribute *attr, \ 234 const char *buf, size_t len) \ 235 { \ 236 unsigned long long value; \ 237 if (sscanf(buf, _fmt_in, &value) != 1) \ 238 return -EINVAL; \ 239 _value = value; \ 240 return len; \ 241 } \ 242 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ 243 __ATTR(_name,(S_IRUGO | S_IWUSR), \ 244 sys_##_prefix##_##_name##_show, \ 245 sys_##_prefix##_##_name##_store) 246 247 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\ 248 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, _value) \ 249 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \ 250 struct kobj_attribute *attr, \ 251 const char *buf, size_t len) \ 252 { \ 253 strncpy(_value, buf, sizeof(_value) - 1); \ 254 strim(_value); \ 255 return len; \ 256 } \ 257 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ 258 __ATTR(_name,(S_IRUGO | S_IWUSR), \ 259 sys_##_prefix##_##_name##_show, \ 260 sys_##_prefix##_##_name##_store) 261 262 /* 263 * ipl section 264 */ 265 266 static __init enum ipl_type get_ipl_type(void) 267 { 268 if (!ipl_block_valid) 269 return IPL_TYPE_UNKNOWN; 270 271 switch (ipl_block.pb0_hdr.pbt) { 272 case IPL_PBT_CCW: 273 return IPL_TYPE_CCW; 274 case IPL_PBT_FCP: 275 if (ipl_block.fcp.opt == IPL_PB0_FCP_OPT_DUMP) 276 return IPL_TYPE_FCP_DUMP; 277 else 278 return IPL_TYPE_FCP; 279 case IPL_PBT_NVME: 280 if (ipl_block.nvme.opt == IPL_PB0_NVME_OPT_DUMP) 281 return IPL_TYPE_NVME_DUMP; 282 else 283 return IPL_TYPE_NVME; 284 } 285 return IPL_TYPE_UNKNOWN; 286 } 287 288 struct ipl_info ipl_info; 289 EXPORT_SYMBOL_GPL(ipl_info); 290 291 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr, 292 char *page) 293 { 294 return sprintf(page, "%s\n", ipl_type_str(ipl_info.type)); 295 } 296 297 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type); 298 299 static ssize_t ipl_secure_show(struct kobject *kobj, 300 struct kobj_attribute *attr, char *page) 301 { 302 return sprintf(page, "%i\n", !!ipl_secure_flag); 303 } 304 305 static struct kobj_attribute sys_ipl_secure_attr = 306 __ATTR(secure, 0444, ipl_secure_show, NULL); 307 308 static ssize_t ipl_has_secure_show(struct kobject *kobj, 309 struct kobj_attribute *attr, char *page) 310 { 311 return sprintf(page, "%i\n", !!sclp.has_sipl); 312 } 313 314 static struct kobj_attribute sys_ipl_has_secure_attr = 315 __ATTR(has_secure, 0444, ipl_has_secure_show, NULL); 316 317 static ssize_t ipl_vm_parm_show(struct kobject *kobj, 318 struct kobj_attribute *attr, char *page) 319 { 320 char parm[DIAG308_VMPARM_SIZE + 1] = {}; 321 322 if (ipl_block_valid && (ipl_block.pb0_hdr.pbt == IPL_PBT_CCW)) 323 ipl_block_get_ascii_vmparm(parm, sizeof(parm), &ipl_block); 324 return sprintf(page, "%s\n", parm); 325 } 326 327 static struct kobj_attribute sys_ipl_vm_parm_attr = 328 __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL); 329 330 static ssize_t sys_ipl_device_show(struct kobject *kobj, 331 struct kobj_attribute *attr, char *page) 332 { 333 switch (ipl_info.type) { 334 case IPL_TYPE_CCW: 335 return sprintf(page, "0.%x.%04x\n", ipl_block.ccw.ssid, 336 ipl_block.ccw.devno); 337 case IPL_TYPE_FCP: 338 case IPL_TYPE_FCP_DUMP: 339 return sprintf(page, "0.0.%04x\n", ipl_block.fcp.devno); 340 case IPL_TYPE_NVME: 341 case IPL_TYPE_NVME_DUMP: 342 return sprintf(page, "%08ux\n", ipl_block.nvme.fid); 343 default: 344 return 0; 345 } 346 } 347 348 static struct kobj_attribute sys_ipl_device_attr = 349 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL); 350 351 static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj, 352 struct bin_attribute *attr, char *buf, 353 loff_t off, size_t count) 354 { 355 return memory_read_from_buffer(buf, count, &off, &ipl_block, 356 ipl_block.hdr.len); 357 } 358 static struct bin_attribute ipl_parameter_attr = 359 __BIN_ATTR(binary_parameter, S_IRUGO, ipl_parameter_read, NULL, 360 PAGE_SIZE); 361 362 static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj, 363 struct bin_attribute *attr, char *buf, 364 loff_t off, size_t count) 365 { 366 unsigned int size = ipl_block.fcp.scp_data_len; 367 void *scp_data = &ipl_block.fcp.scp_data; 368 369 return memory_read_from_buffer(buf, count, &off, scp_data, size); 370 } 371 372 static ssize_t ipl_nvme_scp_data_read(struct file *filp, struct kobject *kobj, 373 struct bin_attribute *attr, char *buf, 374 loff_t off, size_t count) 375 { 376 unsigned int size = ipl_block.nvme.scp_data_len; 377 void *scp_data = &ipl_block.nvme.scp_data; 378 379 return memory_read_from_buffer(buf, count, &off, scp_data, size); 380 } 381 382 static struct bin_attribute ipl_scp_data_attr = 383 __BIN_ATTR(scp_data, S_IRUGO, ipl_scp_data_read, NULL, PAGE_SIZE); 384 385 static struct bin_attribute ipl_nvme_scp_data_attr = 386 __BIN_ATTR(scp_data, S_IRUGO, ipl_nvme_scp_data_read, NULL, PAGE_SIZE); 387 388 static struct bin_attribute *ipl_fcp_bin_attrs[] = { 389 &ipl_parameter_attr, 390 &ipl_scp_data_attr, 391 NULL, 392 }; 393 394 static struct bin_attribute *ipl_nvme_bin_attrs[] = { 395 &ipl_parameter_attr, 396 &ipl_nvme_scp_data_attr, 397 NULL, 398 }; 399 400 /* FCP ipl device attributes */ 401 402 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", 403 (unsigned long long)ipl_block.fcp.wwpn); 404 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", 405 (unsigned long long)ipl_block.fcp.lun); 406 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", 407 (unsigned long long)ipl_block.fcp.bootprog); 408 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", 409 (unsigned long long)ipl_block.fcp.br_lba); 410 411 /* NVMe ipl device attributes */ 412 DEFINE_IPL_ATTR_RO(ipl_nvme, fid, "0x%08llx\n", 413 (unsigned long long)ipl_block.nvme.fid); 414 DEFINE_IPL_ATTR_RO(ipl_nvme, nsid, "0x%08llx\n", 415 (unsigned long long)ipl_block.nvme.nsid); 416 DEFINE_IPL_ATTR_RO(ipl_nvme, bootprog, "%lld\n", 417 (unsigned long long)ipl_block.nvme.bootprog); 418 DEFINE_IPL_ATTR_RO(ipl_nvme, br_lba, "%lld\n", 419 (unsigned long long)ipl_block.nvme.br_lba); 420 421 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj, 422 struct kobj_attribute *attr, char *page) 423 { 424 char loadparm[LOADPARM_LEN + 1] = {}; 425 426 if (!sclp_ipl_info.is_valid) 427 return sprintf(page, "#unknown#\n"); 428 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN); 429 EBCASC(loadparm, LOADPARM_LEN); 430 strim(loadparm); 431 return sprintf(page, "%s\n", loadparm); 432 } 433 434 static struct kobj_attribute sys_ipl_ccw_loadparm_attr = 435 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL); 436 437 static struct attribute *ipl_fcp_attrs[] = { 438 &sys_ipl_type_attr.attr, 439 &sys_ipl_device_attr.attr, 440 &sys_ipl_fcp_wwpn_attr.attr, 441 &sys_ipl_fcp_lun_attr.attr, 442 &sys_ipl_fcp_bootprog_attr.attr, 443 &sys_ipl_fcp_br_lba_attr.attr, 444 &sys_ipl_ccw_loadparm_attr.attr, 445 &sys_ipl_secure_attr.attr, 446 &sys_ipl_has_secure_attr.attr, 447 NULL, 448 }; 449 450 static struct attribute_group ipl_fcp_attr_group = { 451 .attrs = ipl_fcp_attrs, 452 .bin_attrs = ipl_fcp_bin_attrs, 453 }; 454 455 static struct attribute *ipl_nvme_attrs[] = { 456 &sys_ipl_type_attr.attr, 457 &sys_ipl_nvme_fid_attr.attr, 458 &sys_ipl_nvme_nsid_attr.attr, 459 &sys_ipl_nvme_bootprog_attr.attr, 460 &sys_ipl_nvme_br_lba_attr.attr, 461 &sys_ipl_ccw_loadparm_attr.attr, 462 &sys_ipl_secure_attr.attr, 463 &sys_ipl_has_secure_attr.attr, 464 NULL, 465 }; 466 467 static struct attribute_group ipl_nvme_attr_group = { 468 .attrs = ipl_nvme_attrs, 469 .bin_attrs = ipl_nvme_bin_attrs, 470 }; 471 472 473 /* CCW ipl device attributes */ 474 475 static struct attribute *ipl_ccw_attrs_vm[] = { 476 &sys_ipl_type_attr.attr, 477 &sys_ipl_device_attr.attr, 478 &sys_ipl_ccw_loadparm_attr.attr, 479 &sys_ipl_vm_parm_attr.attr, 480 &sys_ipl_secure_attr.attr, 481 &sys_ipl_has_secure_attr.attr, 482 NULL, 483 }; 484 485 static struct attribute *ipl_ccw_attrs_lpar[] = { 486 &sys_ipl_type_attr.attr, 487 &sys_ipl_device_attr.attr, 488 &sys_ipl_ccw_loadparm_attr.attr, 489 &sys_ipl_secure_attr.attr, 490 &sys_ipl_has_secure_attr.attr, 491 NULL, 492 }; 493 494 static struct attribute_group ipl_ccw_attr_group_vm = { 495 .attrs = ipl_ccw_attrs_vm, 496 }; 497 498 static struct attribute_group ipl_ccw_attr_group_lpar = { 499 .attrs = ipl_ccw_attrs_lpar 500 }; 501 502 /* UNKNOWN ipl device attributes */ 503 504 static struct attribute *ipl_unknown_attrs[] = { 505 &sys_ipl_type_attr.attr, 506 NULL, 507 }; 508 509 static struct attribute_group ipl_unknown_attr_group = { 510 .attrs = ipl_unknown_attrs, 511 }; 512 513 static struct kset *ipl_kset; 514 515 static void __ipl_run(void *unused) 516 { 517 __bpon(); 518 diag308(DIAG308_LOAD_CLEAR, NULL); 519 } 520 521 static void ipl_run(struct shutdown_trigger *trigger) 522 { 523 smp_call_ipl_cpu(__ipl_run, NULL); 524 } 525 526 static int __init ipl_init(void) 527 { 528 int rc; 529 530 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj); 531 if (!ipl_kset) { 532 rc = -ENOMEM; 533 goto out; 534 } 535 switch (ipl_info.type) { 536 case IPL_TYPE_CCW: 537 if (MACHINE_IS_VM) 538 rc = sysfs_create_group(&ipl_kset->kobj, 539 &ipl_ccw_attr_group_vm); 540 else 541 rc = sysfs_create_group(&ipl_kset->kobj, 542 &ipl_ccw_attr_group_lpar); 543 break; 544 case IPL_TYPE_FCP: 545 case IPL_TYPE_FCP_DUMP: 546 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group); 547 break; 548 case IPL_TYPE_NVME: 549 case IPL_TYPE_NVME_DUMP: 550 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nvme_attr_group); 551 break; 552 default: 553 rc = sysfs_create_group(&ipl_kset->kobj, 554 &ipl_unknown_attr_group); 555 break; 556 } 557 out: 558 if (rc) 559 panic("ipl_init failed: rc = %i\n", rc); 560 561 return 0; 562 } 563 564 static struct shutdown_action __refdata ipl_action = { 565 .name = SHUTDOWN_ACTION_IPL_STR, 566 .fn = ipl_run, 567 .init = ipl_init, 568 }; 569 570 /* 571 * reipl shutdown action: Reboot Linux on shutdown. 572 */ 573 574 /* VM IPL PARM attributes */ 575 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb, 576 char *page) 577 { 578 char vmparm[DIAG308_VMPARM_SIZE + 1] = {}; 579 580 ipl_block_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb); 581 return sprintf(page, "%s\n", vmparm); 582 } 583 584 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb, 585 size_t vmparm_max, 586 const char *buf, size_t len) 587 { 588 int i, ip_len; 589 590 /* ignore trailing newline */ 591 ip_len = len; 592 if ((len > 0) && (buf[len - 1] == '\n')) 593 ip_len--; 594 595 if (ip_len > vmparm_max) 596 return -EINVAL; 597 598 /* parm is used to store kernel options, check for common chars */ 599 for (i = 0; i < ip_len; i++) 600 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i]))) 601 return -EINVAL; 602 603 memset(ipb->ccw.vm_parm, 0, DIAG308_VMPARM_SIZE); 604 ipb->ccw.vm_parm_len = ip_len; 605 if (ip_len > 0) { 606 ipb->ccw.vm_flags |= IPL_PB0_CCW_VM_FLAG_VP; 607 memcpy(ipb->ccw.vm_parm, buf, ip_len); 608 ASCEBC(ipb->ccw.vm_parm, ip_len); 609 } else { 610 ipb->ccw.vm_flags &= ~IPL_PB0_CCW_VM_FLAG_VP; 611 } 612 613 return len; 614 } 615 616 /* NSS wrapper */ 617 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj, 618 struct kobj_attribute *attr, char *page) 619 { 620 return reipl_generic_vmparm_show(reipl_block_nss, page); 621 } 622 623 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj, 624 struct kobj_attribute *attr, 625 const char *buf, size_t len) 626 { 627 return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len); 628 } 629 630 /* CCW wrapper */ 631 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj, 632 struct kobj_attribute *attr, char *page) 633 { 634 return reipl_generic_vmparm_show(reipl_block_ccw, page); 635 } 636 637 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj, 638 struct kobj_attribute *attr, 639 const char *buf, size_t len) 640 { 641 return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len); 642 } 643 644 static struct kobj_attribute sys_reipl_nss_vmparm_attr = 645 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show, 646 reipl_nss_vmparm_store); 647 static struct kobj_attribute sys_reipl_ccw_vmparm_attr = 648 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show, 649 reipl_ccw_vmparm_store); 650 651 /* FCP reipl device attributes */ 652 653 static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj, 654 struct bin_attribute *attr, 655 char *buf, loff_t off, size_t count) 656 { 657 size_t size = reipl_block_fcp->fcp.scp_data_len; 658 void *scp_data = reipl_block_fcp->fcp.scp_data; 659 660 return memory_read_from_buffer(buf, count, &off, scp_data, size); 661 } 662 663 static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj, 664 struct bin_attribute *attr, 665 char *buf, loff_t off, size_t count) 666 { 667 size_t scpdata_len = count; 668 size_t padding; 669 670 671 if (off) 672 return -EINVAL; 673 674 memcpy(reipl_block_fcp->fcp.scp_data, buf, count); 675 if (scpdata_len % 8) { 676 padding = 8 - (scpdata_len % 8); 677 memset(reipl_block_fcp->fcp.scp_data + scpdata_len, 678 0, padding); 679 scpdata_len += padding; 680 } 681 682 reipl_block_fcp->hdr.len = IPL_BP_FCP_LEN + scpdata_len; 683 reipl_block_fcp->fcp.len = IPL_BP0_FCP_LEN + scpdata_len; 684 reipl_block_fcp->fcp.scp_data_len = scpdata_len; 685 686 return count; 687 } 688 static struct bin_attribute sys_reipl_fcp_scp_data_attr = 689 __BIN_ATTR(scp_data, (S_IRUGO | S_IWUSR), reipl_fcp_scpdata_read, 690 reipl_fcp_scpdata_write, DIAG308_SCPDATA_SIZE); 691 692 static struct bin_attribute *reipl_fcp_bin_attrs[] = { 693 &sys_reipl_fcp_scp_data_attr, 694 NULL, 695 }; 696 697 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n", 698 reipl_block_fcp->fcp.wwpn); 699 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n", 700 reipl_block_fcp->fcp.lun); 701 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n", 702 reipl_block_fcp->fcp.bootprog); 703 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n", 704 reipl_block_fcp->fcp.br_lba); 705 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n", 706 reipl_block_fcp->fcp.devno); 707 708 static void reipl_get_ascii_loadparm(char *loadparm, 709 struct ipl_parameter_block *ibp) 710 { 711 memcpy(loadparm, ibp->common.loadparm, LOADPARM_LEN); 712 EBCASC(loadparm, LOADPARM_LEN); 713 loadparm[LOADPARM_LEN] = 0; 714 strim(loadparm); 715 } 716 717 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb, 718 char *page) 719 { 720 char buf[LOADPARM_LEN + 1]; 721 722 reipl_get_ascii_loadparm(buf, ipb); 723 return sprintf(page, "%s\n", buf); 724 } 725 726 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb, 727 const char *buf, size_t len) 728 { 729 int i, lp_len; 730 731 /* ignore trailing newline */ 732 lp_len = len; 733 if ((len > 0) && (buf[len - 1] == '\n')) 734 lp_len--; 735 /* loadparm can have max 8 characters and must not start with a blank */ 736 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' '))) 737 return -EINVAL; 738 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */ 739 for (i = 0; i < lp_len; i++) { 740 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') || 741 (buf[i] == '.')) 742 continue; 743 return -EINVAL; 744 } 745 /* initialize loadparm with blanks */ 746 memset(ipb->common.loadparm, ' ', LOADPARM_LEN); 747 /* copy and convert to ebcdic */ 748 memcpy(ipb->common.loadparm, buf, lp_len); 749 ASCEBC(ipb->common.loadparm, LOADPARM_LEN); 750 ipb->common.flags |= IPL_PB0_FLAG_LOADPARM; 751 return len; 752 } 753 754 /* FCP wrapper */ 755 static ssize_t reipl_fcp_loadparm_show(struct kobject *kobj, 756 struct kobj_attribute *attr, char *page) 757 { 758 return reipl_generic_loadparm_show(reipl_block_fcp, page); 759 } 760 761 static ssize_t reipl_fcp_loadparm_store(struct kobject *kobj, 762 struct kobj_attribute *attr, 763 const char *buf, size_t len) 764 { 765 return reipl_generic_loadparm_store(reipl_block_fcp, buf, len); 766 } 767 768 static struct kobj_attribute sys_reipl_fcp_loadparm_attr = 769 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_fcp_loadparm_show, 770 reipl_fcp_loadparm_store); 771 772 static ssize_t reipl_fcp_clear_show(struct kobject *kobj, 773 struct kobj_attribute *attr, char *page) 774 { 775 return sprintf(page, "%u\n", reipl_fcp_clear); 776 } 777 778 static ssize_t reipl_fcp_clear_store(struct kobject *kobj, 779 struct kobj_attribute *attr, 780 const char *buf, size_t len) 781 { 782 if (strtobool(buf, &reipl_fcp_clear) < 0) 783 return -EINVAL; 784 return len; 785 } 786 787 static struct attribute *reipl_fcp_attrs[] = { 788 &sys_reipl_fcp_device_attr.attr, 789 &sys_reipl_fcp_wwpn_attr.attr, 790 &sys_reipl_fcp_lun_attr.attr, 791 &sys_reipl_fcp_bootprog_attr.attr, 792 &sys_reipl_fcp_br_lba_attr.attr, 793 &sys_reipl_fcp_loadparm_attr.attr, 794 NULL, 795 }; 796 797 static struct attribute_group reipl_fcp_attr_group = { 798 .attrs = reipl_fcp_attrs, 799 .bin_attrs = reipl_fcp_bin_attrs, 800 }; 801 802 static struct kobj_attribute sys_reipl_fcp_clear_attr = 803 __ATTR(clear, 0644, reipl_fcp_clear_show, reipl_fcp_clear_store); 804 805 /* NVME reipl device attributes */ 806 807 static ssize_t reipl_nvme_scpdata_read(struct file *filp, struct kobject *kobj, 808 struct bin_attribute *attr, 809 char *buf, loff_t off, size_t count) 810 { 811 size_t size = reipl_block_nvme->nvme.scp_data_len; 812 void *scp_data = reipl_block_nvme->nvme.scp_data; 813 814 return memory_read_from_buffer(buf, count, &off, scp_data, size); 815 } 816 817 static ssize_t reipl_nvme_scpdata_write(struct file *filp, struct kobject *kobj, 818 struct bin_attribute *attr, 819 char *buf, loff_t off, size_t count) 820 { 821 size_t scpdata_len = count; 822 size_t padding; 823 824 if (off) 825 return -EINVAL; 826 827 memcpy(reipl_block_nvme->nvme.scp_data, buf, count); 828 if (scpdata_len % 8) { 829 padding = 8 - (scpdata_len % 8); 830 memset(reipl_block_nvme->nvme.scp_data + scpdata_len, 831 0, padding); 832 scpdata_len += padding; 833 } 834 835 reipl_block_nvme->hdr.len = IPL_BP_FCP_LEN + scpdata_len; 836 reipl_block_nvme->nvme.len = IPL_BP0_FCP_LEN + scpdata_len; 837 reipl_block_nvme->nvme.scp_data_len = scpdata_len; 838 839 return count; 840 } 841 842 static struct bin_attribute sys_reipl_nvme_scp_data_attr = 843 __BIN_ATTR(scp_data, (S_IRUGO | S_IWUSR), reipl_nvme_scpdata_read, 844 reipl_nvme_scpdata_write, DIAG308_SCPDATA_SIZE); 845 846 static struct bin_attribute *reipl_nvme_bin_attrs[] = { 847 &sys_reipl_nvme_scp_data_attr, 848 NULL, 849 }; 850 851 DEFINE_IPL_ATTR_RW(reipl_nvme, fid, "0x%08llx\n", "%llx\n", 852 reipl_block_nvme->nvme.fid); 853 DEFINE_IPL_ATTR_RW(reipl_nvme, nsid, "0x%08llx\n", "%llx\n", 854 reipl_block_nvme->nvme.nsid); 855 DEFINE_IPL_ATTR_RW(reipl_nvme, bootprog, "%lld\n", "%lld\n", 856 reipl_block_nvme->nvme.bootprog); 857 DEFINE_IPL_ATTR_RW(reipl_nvme, br_lba, "%lld\n", "%lld\n", 858 reipl_block_nvme->nvme.br_lba); 859 860 /* nvme wrapper */ 861 static ssize_t reipl_nvme_loadparm_show(struct kobject *kobj, 862 struct kobj_attribute *attr, char *page) 863 { 864 return reipl_generic_loadparm_show(reipl_block_nvme, page); 865 } 866 867 static ssize_t reipl_nvme_loadparm_store(struct kobject *kobj, 868 struct kobj_attribute *attr, 869 const char *buf, size_t len) 870 { 871 return reipl_generic_loadparm_store(reipl_block_nvme, buf, len); 872 } 873 874 static struct kobj_attribute sys_reipl_nvme_loadparm_attr = 875 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nvme_loadparm_show, 876 reipl_nvme_loadparm_store); 877 878 static struct attribute *reipl_nvme_attrs[] = { 879 &sys_reipl_nvme_fid_attr.attr, 880 &sys_reipl_nvme_nsid_attr.attr, 881 &sys_reipl_nvme_bootprog_attr.attr, 882 &sys_reipl_nvme_br_lba_attr.attr, 883 &sys_reipl_nvme_loadparm_attr.attr, 884 NULL, 885 }; 886 887 static struct attribute_group reipl_nvme_attr_group = { 888 .attrs = reipl_nvme_attrs, 889 .bin_attrs = reipl_nvme_bin_attrs 890 }; 891 892 static ssize_t reipl_nvme_clear_show(struct kobject *kobj, 893 struct kobj_attribute *attr, char *page) 894 { 895 return sprintf(page, "%u\n", reipl_nvme_clear); 896 } 897 898 static ssize_t reipl_nvme_clear_store(struct kobject *kobj, 899 struct kobj_attribute *attr, 900 const char *buf, size_t len) 901 { 902 if (strtobool(buf, &reipl_nvme_clear) < 0) 903 return -EINVAL; 904 return len; 905 } 906 907 static struct kobj_attribute sys_reipl_nvme_clear_attr = 908 __ATTR(clear, 0644, reipl_nvme_clear_show, reipl_nvme_clear_store); 909 910 /* CCW reipl device attributes */ 911 DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ccw); 912 913 /* NSS wrapper */ 914 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj, 915 struct kobj_attribute *attr, char *page) 916 { 917 return reipl_generic_loadparm_show(reipl_block_nss, page); 918 } 919 920 static ssize_t reipl_nss_loadparm_store(struct kobject *kobj, 921 struct kobj_attribute *attr, 922 const char *buf, size_t len) 923 { 924 return reipl_generic_loadparm_store(reipl_block_nss, buf, len); 925 } 926 927 /* CCW wrapper */ 928 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj, 929 struct kobj_attribute *attr, char *page) 930 { 931 return reipl_generic_loadparm_show(reipl_block_ccw, page); 932 } 933 934 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj, 935 struct kobj_attribute *attr, 936 const char *buf, size_t len) 937 { 938 return reipl_generic_loadparm_store(reipl_block_ccw, buf, len); 939 } 940 941 static struct kobj_attribute sys_reipl_ccw_loadparm_attr = 942 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show, 943 reipl_ccw_loadparm_store); 944 945 static ssize_t reipl_ccw_clear_show(struct kobject *kobj, 946 struct kobj_attribute *attr, char *page) 947 { 948 return sprintf(page, "%u\n", reipl_ccw_clear); 949 } 950 951 static ssize_t reipl_ccw_clear_store(struct kobject *kobj, 952 struct kobj_attribute *attr, 953 const char *buf, size_t len) 954 { 955 if (strtobool(buf, &reipl_ccw_clear) < 0) 956 return -EINVAL; 957 return len; 958 } 959 960 static struct kobj_attribute sys_reipl_ccw_clear_attr = 961 __ATTR(clear, 0644, reipl_ccw_clear_show, reipl_ccw_clear_store); 962 963 static struct attribute *reipl_ccw_attrs_vm[] = { 964 &sys_reipl_ccw_device_attr.attr, 965 &sys_reipl_ccw_loadparm_attr.attr, 966 &sys_reipl_ccw_vmparm_attr.attr, 967 &sys_reipl_ccw_clear_attr.attr, 968 NULL, 969 }; 970 971 static struct attribute *reipl_ccw_attrs_lpar[] = { 972 &sys_reipl_ccw_device_attr.attr, 973 &sys_reipl_ccw_loadparm_attr.attr, 974 &sys_reipl_ccw_clear_attr.attr, 975 NULL, 976 }; 977 978 static struct attribute_group reipl_ccw_attr_group_vm = { 979 .name = IPL_CCW_STR, 980 .attrs = reipl_ccw_attrs_vm, 981 }; 982 983 static struct attribute_group reipl_ccw_attr_group_lpar = { 984 .name = IPL_CCW_STR, 985 .attrs = reipl_ccw_attrs_lpar, 986 }; 987 988 989 /* NSS reipl device attributes */ 990 static void reipl_get_ascii_nss_name(char *dst, 991 struct ipl_parameter_block *ipb) 992 { 993 memcpy(dst, ipb->ccw.nss_name, NSS_NAME_SIZE); 994 EBCASC(dst, NSS_NAME_SIZE); 995 dst[NSS_NAME_SIZE] = 0; 996 } 997 998 static ssize_t reipl_nss_name_show(struct kobject *kobj, 999 struct kobj_attribute *attr, char *page) 1000 { 1001 char nss_name[NSS_NAME_SIZE + 1] = {}; 1002 1003 reipl_get_ascii_nss_name(nss_name, reipl_block_nss); 1004 return sprintf(page, "%s\n", nss_name); 1005 } 1006 1007 static ssize_t reipl_nss_name_store(struct kobject *kobj, 1008 struct kobj_attribute *attr, 1009 const char *buf, size_t len) 1010 { 1011 int nss_len; 1012 1013 /* ignore trailing newline */ 1014 nss_len = len; 1015 if ((len > 0) && (buf[len - 1] == '\n')) 1016 nss_len--; 1017 1018 if (nss_len > NSS_NAME_SIZE) 1019 return -EINVAL; 1020 1021 memset(reipl_block_nss->ccw.nss_name, 0x40, NSS_NAME_SIZE); 1022 if (nss_len > 0) { 1023 reipl_block_nss->ccw.vm_flags |= IPL_PB0_CCW_VM_FLAG_NSS; 1024 memcpy(reipl_block_nss->ccw.nss_name, buf, nss_len); 1025 ASCEBC(reipl_block_nss->ccw.nss_name, nss_len); 1026 EBC_TOUPPER(reipl_block_nss->ccw.nss_name, nss_len); 1027 } else { 1028 reipl_block_nss->ccw.vm_flags &= ~IPL_PB0_CCW_VM_FLAG_NSS; 1029 } 1030 1031 return len; 1032 } 1033 1034 static struct kobj_attribute sys_reipl_nss_name_attr = 1035 __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show, 1036 reipl_nss_name_store); 1037 1038 static struct kobj_attribute sys_reipl_nss_loadparm_attr = 1039 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show, 1040 reipl_nss_loadparm_store); 1041 1042 static struct attribute *reipl_nss_attrs[] = { 1043 &sys_reipl_nss_name_attr.attr, 1044 &sys_reipl_nss_loadparm_attr.attr, 1045 &sys_reipl_nss_vmparm_attr.attr, 1046 NULL, 1047 }; 1048 1049 static struct attribute_group reipl_nss_attr_group = { 1050 .name = IPL_NSS_STR, 1051 .attrs = reipl_nss_attrs, 1052 }; 1053 1054 void set_os_info_reipl_block(void) 1055 { 1056 os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual, 1057 reipl_block_actual->hdr.len); 1058 } 1059 1060 /* reipl type */ 1061 1062 static int reipl_set_type(enum ipl_type type) 1063 { 1064 if (!(reipl_capabilities & type)) 1065 return -EINVAL; 1066 1067 switch(type) { 1068 case IPL_TYPE_CCW: 1069 reipl_block_actual = reipl_block_ccw; 1070 break; 1071 case IPL_TYPE_FCP: 1072 reipl_block_actual = reipl_block_fcp; 1073 break; 1074 case IPL_TYPE_NVME: 1075 reipl_block_actual = reipl_block_nvme; 1076 break; 1077 case IPL_TYPE_NSS: 1078 reipl_block_actual = reipl_block_nss; 1079 break; 1080 default: 1081 break; 1082 } 1083 reipl_type = type; 1084 return 0; 1085 } 1086 1087 static ssize_t reipl_type_show(struct kobject *kobj, 1088 struct kobj_attribute *attr, char *page) 1089 { 1090 return sprintf(page, "%s\n", ipl_type_str(reipl_type)); 1091 } 1092 1093 static ssize_t reipl_type_store(struct kobject *kobj, 1094 struct kobj_attribute *attr, 1095 const char *buf, size_t len) 1096 { 1097 int rc = -EINVAL; 1098 1099 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0) 1100 rc = reipl_set_type(IPL_TYPE_CCW); 1101 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0) 1102 rc = reipl_set_type(IPL_TYPE_FCP); 1103 else if (strncmp(buf, IPL_NVME_STR, strlen(IPL_NVME_STR)) == 0) 1104 rc = reipl_set_type(IPL_TYPE_NVME); 1105 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0) 1106 rc = reipl_set_type(IPL_TYPE_NSS); 1107 return (rc != 0) ? rc : len; 1108 } 1109 1110 static struct kobj_attribute reipl_type_attr = 1111 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store); 1112 1113 static struct kset *reipl_kset; 1114 static struct kset *reipl_fcp_kset; 1115 static struct kset *reipl_nvme_kset; 1116 1117 static void __reipl_run(void *unused) 1118 { 1119 switch (reipl_type) { 1120 case IPL_TYPE_CCW: 1121 diag308(DIAG308_SET, reipl_block_ccw); 1122 if (reipl_ccw_clear) 1123 diag308(DIAG308_LOAD_CLEAR, NULL); 1124 else 1125 diag308(DIAG308_LOAD_NORMAL_DUMP, NULL); 1126 break; 1127 case IPL_TYPE_FCP: 1128 diag308(DIAG308_SET, reipl_block_fcp); 1129 if (reipl_fcp_clear) 1130 diag308(DIAG308_LOAD_CLEAR, NULL); 1131 else 1132 diag308(DIAG308_LOAD_NORMAL, NULL); 1133 break; 1134 case IPL_TYPE_NVME: 1135 diag308(DIAG308_SET, reipl_block_nvme); 1136 if (reipl_nvme_clear) 1137 diag308(DIAG308_LOAD_CLEAR, NULL); 1138 else 1139 diag308(DIAG308_LOAD_NORMAL, NULL); 1140 break; 1141 case IPL_TYPE_NSS: 1142 diag308(DIAG308_SET, reipl_block_nss); 1143 diag308(DIAG308_LOAD_CLEAR, NULL); 1144 break; 1145 case IPL_TYPE_UNKNOWN: 1146 diag308(DIAG308_LOAD_CLEAR, NULL); 1147 break; 1148 case IPL_TYPE_FCP_DUMP: 1149 case IPL_TYPE_NVME_DUMP: 1150 break; 1151 } 1152 disabled_wait(); 1153 } 1154 1155 static void reipl_run(struct shutdown_trigger *trigger) 1156 { 1157 smp_call_ipl_cpu(__reipl_run, NULL); 1158 } 1159 1160 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb) 1161 { 1162 ipb->hdr.len = IPL_BP_CCW_LEN; 1163 ipb->hdr.version = IPL_PARM_BLOCK_VERSION; 1164 ipb->pb0_hdr.len = IPL_BP0_CCW_LEN; 1165 ipb->pb0_hdr.pbt = IPL_PBT_CCW; 1166 } 1167 1168 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb) 1169 { 1170 /* LOADPARM */ 1171 /* check if read scp info worked and set loadparm */ 1172 if (sclp_ipl_info.is_valid) 1173 memcpy(ipb->ccw.loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN); 1174 else 1175 /* read scp info failed: set empty loadparm (EBCDIC blanks) */ 1176 memset(ipb->ccw.loadparm, 0x40, LOADPARM_LEN); 1177 ipb->ccw.flags = IPL_PB0_FLAG_LOADPARM; 1178 1179 /* VM PARM */ 1180 if (MACHINE_IS_VM && ipl_block_valid && 1181 (ipl_block.ccw.vm_flags & IPL_PB0_CCW_VM_FLAG_VP)) { 1182 1183 ipb->ccw.vm_flags |= IPL_PB0_CCW_VM_FLAG_VP; 1184 ipb->ccw.vm_parm_len = ipl_block.ccw.vm_parm_len; 1185 memcpy(ipb->ccw.vm_parm, 1186 ipl_block.ccw.vm_parm, DIAG308_VMPARM_SIZE); 1187 } 1188 } 1189 1190 static int __init reipl_nss_init(void) 1191 { 1192 int rc; 1193 1194 if (!MACHINE_IS_VM) 1195 return 0; 1196 1197 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL); 1198 if (!reipl_block_nss) 1199 return -ENOMEM; 1200 1201 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group); 1202 if (rc) 1203 return rc; 1204 1205 reipl_block_ccw_init(reipl_block_nss); 1206 reipl_capabilities |= IPL_TYPE_NSS; 1207 return 0; 1208 } 1209 1210 static int __init reipl_ccw_init(void) 1211 { 1212 int rc; 1213 1214 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL); 1215 if (!reipl_block_ccw) 1216 return -ENOMEM; 1217 1218 rc = sysfs_create_group(&reipl_kset->kobj, 1219 MACHINE_IS_VM ? &reipl_ccw_attr_group_vm 1220 : &reipl_ccw_attr_group_lpar); 1221 if (rc) 1222 return rc; 1223 1224 reipl_block_ccw_init(reipl_block_ccw); 1225 if (ipl_info.type == IPL_TYPE_CCW) { 1226 reipl_block_ccw->ccw.ssid = ipl_block.ccw.ssid; 1227 reipl_block_ccw->ccw.devno = ipl_block.ccw.devno; 1228 reipl_block_ccw_fill_parms(reipl_block_ccw); 1229 } 1230 1231 reipl_capabilities |= IPL_TYPE_CCW; 1232 return 0; 1233 } 1234 1235 static int __init reipl_fcp_init(void) 1236 { 1237 int rc; 1238 1239 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL); 1240 if (!reipl_block_fcp) 1241 return -ENOMEM; 1242 1243 /* sysfs: create fcp kset for mixing attr group and bin attrs */ 1244 reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL, 1245 &reipl_kset->kobj); 1246 if (!reipl_fcp_kset) { 1247 free_page((unsigned long) reipl_block_fcp); 1248 return -ENOMEM; 1249 } 1250 1251 rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group); 1252 if (rc) 1253 goto out1; 1254 1255 if (test_facility(141)) { 1256 rc = sysfs_create_file(&reipl_fcp_kset->kobj, 1257 &sys_reipl_fcp_clear_attr.attr); 1258 if (rc) 1259 goto out2; 1260 } else { 1261 reipl_fcp_clear = true; 1262 } 1263 1264 if (ipl_info.type == IPL_TYPE_FCP) { 1265 memcpy(reipl_block_fcp, &ipl_block, sizeof(ipl_block)); 1266 /* 1267 * Fix loadparm: There are systems where the (SCSI) LOADPARM 1268 * is invalid in the SCSI IPL parameter block, so take it 1269 * always from sclp_ipl_info. 1270 */ 1271 memcpy(reipl_block_fcp->fcp.loadparm, sclp_ipl_info.loadparm, 1272 LOADPARM_LEN); 1273 } else { 1274 reipl_block_fcp->hdr.len = IPL_BP_FCP_LEN; 1275 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION; 1276 reipl_block_fcp->fcp.len = IPL_BP0_FCP_LEN; 1277 reipl_block_fcp->fcp.pbt = IPL_PBT_FCP; 1278 reipl_block_fcp->fcp.opt = IPL_PB0_FCP_OPT_IPL; 1279 } 1280 reipl_capabilities |= IPL_TYPE_FCP; 1281 return 0; 1282 1283 out2: 1284 sysfs_remove_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group); 1285 out1: 1286 kset_unregister(reipl_fcp_kset); 1287 free_page((unsigned long) reipl_block_fcp); 1288 return rc; 1289 } 1290 1291 static int __init reipl_nvme_init(void) 1292 { 1293 int rc; 1294 1295 reipl_block_nvme = (void *) get_zeroed_page(GFP_KERNEL); 1296 if (!reipl_block_nvme) 1297 return -ENOMEM; 1298 1299 /* sysfs: create kset for mixing attr group and bin attrs */ 1300 reipl_nvme_kset = kset_create_and_add(IPL_NVME_STR, NULL, 1301 &reipl_kset->kobj); 1302 if (!reipl_nvme_kset) { 1303 free_page((unsigned long) reipl_block_nvme); 1304 return -ENOMEM; 1305 } 1306 1307 rc = sysfs_create_group(&reipl_nvme_kset->kobj, &reipl_nvme_attr_group); 1308 if (rc) 1309 goto out1; 1310 1311 if (test_facility(141)) { 1312 rc = sysfs_create_file(&reipl_nvme_kset->kobj, 1313 &sys_reipl_nvme_clear_attr.attr); 1314 if (rc) 1315 goto out2; 1316 } else { 1317 reipl_nvme_clear = true; 1318 } 1319 1320 if (ipl_info.type == IPL_TYPE_NVME) { 1321 memcpy(reipl_block_nvme, &ipl_block, sizeof(ipl_block)); 1322 /* 1323 * Fix loadparm: There are systems where the (SCSI) LOADPARM 1324 * is invalid in the IPL parameter block, so take it 1325 * always from sclp_ipl_info. 1326 */ 1327 memcpy(reipl_block_nvme->nvme.loadparm, sclp_ipl_info.loadparm, 1328 LOADPARM_LEN); 1329 } else { 1330 reipl_block_nvme->hdr.len = IPL_BP_NVME_LEN; 1331 reipl_block_nvme->hdr.version = IPL_PARM_BLOCK_VERSION; 1332 reipl_block_nvme->nvme.len = IPL_BP0_NVME_LEN; 1333 reipl_block_nvme->nvme.pbt = IPL_PBT_NVME; 1334 reipl_block_nvme->nvme.opt = IPL_PB0_NVME_OPT_IPL; 1335 } 1336 reipl_capabilities |= IPL_TYPE_NVME; 1337 return 0; 1338 1339 out2: 1340 sysfs_remove_group(&reipl_nvme_kset->kobj, &reipl_nvme_attr_group); 1341 out1: 1342 kset_unregister(reipl_nvme_kset); 1343 free_page((unsigned long) reipl_block_nvme); 1344 return rc; 1345 } 1346 1347 static int __init reipl_type_init(void) 1348 { 1349 enum ipl_type reipl_type = ipl_info.type; 1350 struct ipl_parameter_block *reipl_block; 1351 unsigned long size; 1352 1353 reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size); 1354 if (!reipl_block) 1355 goto out; 1356 /* 1357 * If we have an OS info reipl block, this will be used 1358 */ 1359 if (reipl_block->pb0_hdr.pbt == IPL_PBT_FCP) { 1360 memcpy(reipl_block_fcp, reipl_block, size); 1361 reipl_type = IPL_TYPE_FCP; 1362 } else if (reipl_block->pb0_hdr.pbt == IPL_PBT_NVME) { 1363 memcpy(reipl_block_nvme, reipl_block, size); 1364 reipl_type = IPL_TYPE_NVME; 1365 } else if (reipl_block->pb0_hdr.pbt == IPL_PBT_CCW) { 1366 memcpy(reipl_block_ccw, reipl_block, size); 1367 reipl_type = IPL_TYPE_CCW; 1368 } 1369 out: 1370 return reipl_set_type(reipl_type); 1371 } 1372 1373 static int __init reipl_init(void) 1374 { 1375 int rc; 1376 1377 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj); 1378 if (!reipl_kset) 1379 return -ENOMEM; 1380 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr); 1381 if (rc) { 1382 kset_unregister(reipl_kset); 1383 return rc; 1384 } 1385 rc = reipl_ccw_init(); 1386 if (rc) 1387 return rc; 1388 rc = reipl_fcp_init(); 1389 if (rc) 1390 return rc; 1391 rc = reipl_nvme_init(); 1392 if (rc) 1393 return rc; 1394 rc = reipl_nss_init(); 1395 if (rc) 1396 return rc; 1397 return reipl_type_init(); 1398 } 1399 1400 static struct shutdown_action __refdata reipl_action = { 1401 .name = SHUTDOWN_ACTION_REIPL_STR, 1402 .fn = reipl_run, 1403 .init = reipl_init, 1404 }; 1405 1406 /* 1407 * dump shutdown action: Dump Linux on shutdown. 1408 */ 1409 1410 /* FCP dump device attributes */ 1411 1412 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n", 1413 dump_block_fcp->fcp.wwpn); 1414 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n", 1415 dump_block_fcp->fcp.lun); 1416 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n", 1417 dump_block_fcp->fcp.bootprog); 1418 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n", 1419 dump_block_fcp->fcp.br_lba); 1420 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n", 1421 dump_block_fcp->fcp.devno); 1422 1423 static struct attribute *dump_fcp_attrs[] = { 1424 &sys_dump_fcp_device_attr.attr, 1425 &sys_dump_fcp_wwpn_attr.attr, 1426 &sys_dump_fcp_lun_attr.attr, 1427 &sys_dump_fcp_bootprog_attr.attr, 1428 &sys_dump_fcp_br_lba_attr.attr, 1429 NULL, 1430 }; 1431 1432 static struct attribute_group dump_fcp_attr_group = { 1433 .name = IPL_FCP_STR, 1434 .attrs = dump_fcp_attrs, 1435 }; 1436 1437 /* NVME dump device attributes */ 1438 DEFINE_IPL_ATTR_RW(dump_nvme, fid, "0x%08llx\n", "%llx\n", 1439 dump_block_nvme->nvme.fid); 1440 DEFINE_IPL_ATTR_RW(dump_nvme, nsid, "0x%08llx\n", "%llx\n", 1441 dump_block_nvme->nvme.nsid); 1442 DEFINE_IPL_ATTR_RW(dump_nvme, bootprog, "%lld\n", "%llx\n", 1443 dump_block_nvme->nvme.bootprog); 1444 DEFINE_IPL_ATTR_RW(dump_nvme, br_lba, "%lld\n", "%llx\n", 1445 dump_block_nvme->nvme.br_lba); 1446 1447 static struct attribute *dump_nvme_attrs[] = { 1448 &sys_dump_nvme_fid_attr.attr, 1449 &sys_dump_nvme_nsid_attr.attr, 1450 &sys_dump_nvme_bootprog_attr.attr, 1451 &sys_dump_nvme_br_lba_attr.attr, 1452 NULL, 1453 }; 1454 1455 static struct attribute_group dump_nvme_attr_group = { 1456 .name = IPL_NVME_STR, 1457 .attrs = dump_nvme_attrs, 1458 }; 1459 1460 /* CCW dump device attributes */ 1461 DEFINE_IPL_CCW_ATTR_RW(dump_ccw, device, dump_block_ccw->ccw); 1462 1463 static struct attribute *dump_ccw_attrs[] = { 1464 &sys_dump_ccw_device_attr.attr, 1465 NULL, 1466 }; 1467 1468 static struct attribute_group dump_ccw_attr_group = { 1469 .name = IPL_CCW_STR, 1470 .attrs = dump_ccw_attrs, 1471 }; 1472 1473 /* dump type */ 1474 1475 static int dump_set_type(enum dump_type type) 1476 { 1477 if (!(dump_capabilities & type)) 1478 return -EINVAL; 1479 dump_type = type; 1480 return 0; 1481 } 1482 1483 static ssize_t dump_type_show(struct kobject *kobj, 1484 struct kobj_attribute *attr, char *page) 1485 { 1486 return sprintf(page, "%s\n", dump_type_str(dump_type)); 1487 } 1488 1489 static ssize_t dump_type_store(struct kobject *kobj, 1490 struct kobj_attribute *attr, 1491 const char *buf, size_t len) 1492 { 1493 int rc = -EINVAL; 1494 1495 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0) 1496 rc = dump_set_type(DUMP_TYPE_NONE); 1497 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0) 1498 rc = dump_set_type(DUMP_TYPE_CCW); 1499 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0) 1500 rc = dump_set_type(DUMP_TYPE_FCP); 1501 else if (strncmp(buf, DUMP_NVME_STR, strlen(DUMP_NVME_STR)) == 0) 1502 rc = dump_set_type(DUMP_TYPE_NVME); 1503 return (rc != 0) ? rc : len; 1504 } 1505 1506 static struct kobj_attribute dump_type_attr = 1507 __ATTR(dump_type, 0644, dump_type_show, dump_type_store); 1508 1509 static struct kset *dump_kset; 1510 1511 static void diag308_dump(void *dump_block) 1512 { 1513 diag308(DIAG308_SET, dump_block); 1514 while (1) { 1515 if (diag308(DIAG308_LOAD_NORMAL_DUMP, NULL) != 0x302) 1516 break; 1517 udelay(USEC_PER_SEC); 1518 } 1519 } 1520 1521 static void __dump_run(void *unused) 1522 { 1523 switch (dump_type) { 1524 case DUMP_TYPE_CCW: 1525 diag308_dump(dump_block_ccw); 1526 break; 1527 case DUMP_TYPE_FCP: 1528 diag308_dump(dump_block_fcp); 1529 break; 1530 case DUMP_TYPE_NVME: 1531 diag308_dump(dump_block_nvme); 1532 break; 1533 default: 1534 break; 1535 } 1536 } 1537 1538 static void dump_run(struct shutdown_trigger *trigger) 1539 { 1540 if (dump_type == DUMP_TYPE_NONE) 1541 return; 1542 smp_send_stop(); 1543 smp_call_ipl_cpu(__dump_run, NULL); 1544 } 1545 1546 static int __init dump_ccw_init(void) 1547 { 1548 int rc; 1549 1550 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL); 1551 if (!dump_block_ccw) 1552 return -ENOMEM; 1553 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group); 1554 if (rc) { 1555 free_page((unsigned long)dump_block_ccw); 1556 return rc; 1557 } 1558 dump_block_ccw->hdr.len = IPL_BP_CCW_LEN; 1559 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION; 1560 dump_block_ccw->ccw.len = IPL_BP0_CCW_LEN; 1561 dump_block_ccw->ccw.pbt = IPL_PBT_CCW; 1562 dump_capabilities |= DUMP_TYPE_CCW; 1563 return 0; 1564 } 1565 1566 static int __init dump_fcp_init(void) 1567 { 1568 int rc; 1569 1570 if (!sclp_ipl_info.has_dump) 1571 return 0; /* LDIPL DUMP is not installed */ 1572 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL); 1573 if (!dump_block_fcp) 1574 return -ENOMEM; 1575 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group); 1576 if (rc) { 1577 free_page((unsigned long)dump_block_fcp); 1578 return rc; 1579 } 1580 dump_block_fcp->hdr.len = IPL_BP_FCP_LEN; 1581 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION; 1582 dump_block_fcp->fcp.len = IPL_BP0_FCP_LEN; 1583 dump_block_fcp->fcp.pbt = IPL_PBT_FCP; 1584 dump_block_fcp->fcp.opt = IPL_PB0_FCP_OPT_DUMP; 1585 dump_capabilities |= DUMP_TYPE_FCP; 1586 return 0; 1587 } 1588 1589 static int __init dump_nvme_init(void) 1590 { 1591 int rc; 1592 1593 if (!sclp_ipl_info.has_dump) 1594 return 0; /* LDIPL DUMP is not installed */ 1595 dump_block_nvme = (void *) get_zeroed_page(GFP_KERNEL); 1596 if (!dump_block_nvme) 1597 return -ENOMEM; 1598 rc = sysfs_create_group(&dump_kset->kobj, &dump_nvme_attr_group); 1599 if (rc) { 1600 free_page((unsigned long)dump_block_nvme); 1601 return rc; 1602 } 1603 dump_block_nvme->hdr.len = IPL_BP_NVME_LEN; 1604 dump_block_nvme->hdr.version = IPL_PARM_BLOCK_VERSION; 1605 dump_block_nvme->fcp.len = IPL_BP0_NVME_LEN; 1606 dump_block_nvme->fcp.pbt = IPL_PBT_NVME; 1607 dump_block_nvme->fcp.opt = IPL_PB0_NVME_OPT_DUMP; 1608 dump_capabilities |= DUMP_TYPE_NVME; 1609 return 0; 1610 } 1611 1612 static int __init dump_init(void) 1613 { 1614 int rc; 1615 1616 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj); 1617 if (!dump_kset) 1618 return -ENOMEM; 1619 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr); 1620 if (rc) { 1621 kset_unregister(dump_kset); 1622 return rc; 1623 } 1624 rc = dump_ccw_init(); 1625 if (rc) 1626 return rc; 1627 rc = dump_fcp_init(); 1628 if (rc) 1629 return rc; 1630 rc = dump_nvme_init(); 1631 if (rc) 1632 return rc; 1633 dump_set_type(DUMP_TYPE_NONE); 1634 return 0; 1635 } 1636 1637 static struct shutdown_action __refdata dump_action = { 1638 .name = SHUTDOWN_ACTION_DUMP_STR, 1639 .fn = dump_run, 1640 .init = dump_init, 1641 }; 1642 1643 static void dump_reipl_run(struct shutdown_trigger *trigger) 1644 { 1645 unsigned long ipib = (unsigned long) reipl_block_actual; 1646 unsigned int csum; 1647 1648 csum = (__force unsigned int) 1649 csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0); 1650 mem_assign_absolute(S390_lowcore.ipib, ipib); 1651 mem_assign_absolute(S390_lowcore.ipib_checksum, csum); 1652 dump_run(trigger); 1653 } 1654 1655 static struct shutdown_action __refdata dump_reipl_action = { 1656 .name = SHUTDOWN_ACTION_DUMP_REIPL_STR, 1657 .fn = dump_reipl_run, 1658 }; 1659 1660 /* 1661 * vmcmd shutdown action: Trigger vm command on shutdown. 1662 */ 1663 1664 static char vmcmd_on_reboot[128]; 1665 static char vmcmd_on_panic[128]; 1666 static char vmcmd_on_halt[128]; 1667 static char vmcmd_on_poff[128]; 1668 static char vmcmd_on_restart[128]; 1669 1670 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot); 1671 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic); 1672 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt); 1673 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff); 1674 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart); 1675 1676 static struct attribute *vmcmd_attrs[] = { 1677 &sys_vmcmd_on_reboot_attr.attr, 1678 &sys_vmcmd_on_panic_attr.attr, 1679 &sys_vmcmd_on_halt_attr.attr, 1680 &sys_vmcmd_on_poff_attr.attr, 1681 &sys_vmcmd_on_restart_attr.attr, 1682 NULL, 1683 }; 1684 1685 static struct attribute_group vmcmd_attr_group = { 1686 .attrs = vmcmd_attrs, 1687 }; 1688 1689 static struct kset *vmcmd_kset; 1690 1691 static void vmcmd_run(struct shutdown_trigger *trigger) 1692 { 1693 char *cmd; 1694 1695 if (strcmp(trigger->name, ON_REIPL_STR) == 0) 1696 cmd = vmcmd_on_reboot; 1697 else if (strcmp(trigger->name, ON_PANIC_STR) == 0) 1698 cmd = vmcmd_on_panic; 1699 else if (strcmp(trigger->name, ON_HALT_STR) == 0) 1700 cmd = vmcmd_on_halt; 1701 else if (strcmp(trigger->name, ON_POFF_STR) == 0) 1702 cmd = vmcmd_on_poff; 1703 else if (strcmp(trigger->name, ON_RESTART_STR) == 0) 1704 cmd = vmcmd_on_restart; 1705 else 1706 return; 1707 1708 if (strlen(cmd) == 0) 1709 return; 1710 __cpcmd(cmd, NULL, 0, NULL); 1711 } 1712 1713 static int vmcmd_init(void) 1714 { 1715 if (!MACHINE_IS_VM) 1716 return -EOPNOTSUPP; 1717 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj); 1718 if (!vmcmd_kset) 1719 return -ENOMEM; 1720 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group); 1721 } 1722 1723 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR, 1724 vmcmd_run, vmcmd_init}; 1725 1726 /* 1727 * stop shutdown action: Stop Linux on shutdown. 1728 */ 1729 1730 static void stop_run(struct shutdown_trigger *trigger) 1731 { 1732 if (strcmp(trigger->name, ON_PANIC_STR) == 0 || 1733 strcmp(trigger->name, ON_RESTART_STR) == 0) 1734 disabled_wait(); 1735 smp_stop_cpu(); 1736 } 1737 1738 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR, 1739 stop_run, NULL}; 1740 1741 /* action list */ 1742 1743 static struct shutdown_action *shutdown_actions_list[] = { 1744 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action, 1745 &vmcmd_action, &stop_action}; 1746 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *)) 1747 1748 /* 1749 * Trigger section 1750 */ 1751 1752 static struct kset *shutdown_actions_kset; 1753 1754 static int set_trigger(const char *buf, struct shutdown_trigger *trigger, 1755 size_t len) 1756 { 1757 int i; 1758 1759 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) { 1760 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) { 1761 if (shutdown_actions_list[i]->init_rc) { 1762 return shutdown_actions_list[i]->init_rc; 1763 } else { 1764 trigger->action = shutdown_actions_list[i]; 1765 return len; 1766 } 1767 } 1768 } 1769 return -EINVAL; 1770 } 1771 1772 /* on reipl */ 1773 1774 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR, 1775 &reipl_action}; 1776 1777 static ssize_t on_reboot_show(struct kobject *kobj, 1778 struct kobj_attribute *attr, char *page) 1779 { 1780 return sprintf(page, "%s\n", on_reboot_trigger.action->name); 1781 } 1782 1783 static ssize_t on_reboot_store(struct kobject *kobj, 1784 struct kobj_attribute *attr, 1785 const char *buf, size_t len) 1786 { 1787 return set_trigger(buf, &on_reboot_trigger, len); 1788 } 1789 static struct kobj_attribute on_reboot_attr = __ATTR_RW(on_reboot); 1790 1791 static void do_machine_restart(char *__unused) 1792 { 1793 smp_send_stop(); 1794 on_reboot_trigger.action->fn(&on_reboot_trigger); 1795 reipl_run(NULL); 1796 } 1797 void (*_machine_restart)(char *command) = do_machine_restart; 1798 1799 /* on panic */ 1800 1801 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action}; 1802 1803 static ssize_t on_panic_show(struct kobject *kobj, 1804 struct kobj_attribute *attr, char *page) 1805 { 1806 return sprintf(page, "%s\n", on_panic_trigger.action->name); 1807 } 1808 1809 static ssize_t on_panic_store(struct kobject *kobj, 1810 struct kobj_attribute *attr, 1811 const char *buf, size_t len) 1812 { 1813 return set_trigger(buf, &on_panic_trigger, len); 1814 } 1815 static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic); 1816 1817 static void do_panic(void) 1818 { 1819 lgr_info_log(); 1820 on_panic_trigger.action->fn(&on_panic_trigger); 1821 stop_run(&on_panic_trigger); 1822 } 1823 1824 /* on restart */ 1825 1826 static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR, 1827 &stop_action}; 1828 1829 static ssize_t on_restart_show(struct kobject *kobj, 1830 struct kobj_attribute *attr, char *page) 1831 { 1832 return sprintf(page, "%s\n", on_restart_trigger.action->name); 1833 } 1834 1835 static ssize_t on_restart_store(struct kobject *kobj, 1836 struct kobj_attribute *attr, 1837 const char *buf, size_t len) 1838 { 1839 return set_trigger(buf, &on_restart_trigger, len); 1840 } 1841 static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart); 1842 1843 static void __do_restart(void *ignore) 1844 { 1845 __arch_local_irq_stosm(0x04); /* enable DAT */ 1846 smp_send_stop(); 1847 #ifdef CONFIG_CRASH_DUMP 1848 crash_kexec(NULL); 1849 #endif 1850 on_restart_trigger.action->fn(&on_restart_trigger); 1851 stop_run(&on_restart_trigger); 1852 } 1853 1854 void do_restart(void *arg) 1855 { 1856 tracing_off(); 1857 debug_locks_off(); 1858 lgr_info_log(); 1859 smp_call_online_cpu(__do_restart, arg); 1860 } 1861 1862 /* on halt */ 1863 1864 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action}; 1865 1866 static ssize_t on_halt_show(struct kobject *kobj, 1867 struct kobj_attribute *attr, char *page) 1868 { 1869 return sprintf(page, "%s\n", on_halt_trigger.action->name); 1870 } 1871 1872 static ssize_t on_halt_store(struct kobject *kobj, 1873 struct kobj_attribute *attr, 1874 const char *buf, size_t len) 1875 { 1876 return set_trigger(buf, &on_halt_trigger, len); 1877 } 1878 static struct kobj_attribute on_halt_attr = __ATTR_RW(on_halt); 1879 1880 static void do_machine_halt(void) 1881 { 1882 smp_send_stop(); 1883 on_halt_trigger.action->fn(&on_halt_trigger); 1884 stop_run(&on_halt_trigger); 1885 } 1886 void (*_machine_halt)(void) = do_machine_halt; 1887 1888 /* on power off */ 1889 1890 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action}; 1891 1892 static ssize_t on_poff_show(struct kobject *kobj, 1893 struct kobj_attribute *attr, char *page) 1894 { 1895 return sprintf(page, "%s\n", on_poff_trigger.action->name); 1896 } 1897 1898 static ssize_t on_poff_store(struct kobject *kobj, 1899 struct kobj_attribute *attr, 1900 const char *buf, size_t len) 1901 { 1902 return set_trigger(buf, &on_poff_trigger, len); 1903 } 1904 static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff); 1905 1906 static void do_machine_power_off(void) 1907 { 1908 smp_send_stop(); 1909 on_poff_trigger.action->fn(&on_poff_trigger); 1910 stop_run(&on_poff_trigger); 1911 } 1912 void (*_machine_power_off)(void) = do_machine_power_off; 1913 1914 static struct attribute *shutdown_action_attrs[] = { 1915 &on_restart_attr.attr, 1916 &on_reboot_attr.attr, 1917 &on_panic_attr.attr, 1918 &on_halt_attr.attr, 1919 &on_poff_attr.attr, 1920 NULL, 1921 }; 1922 1923 static struct attribute_group shutdown_action_attr_group = { 1924 .attrs = shutdown_action_attrs, 1925 }; 1926 1927 static void __init shutdown_triggers_init(void) 1928 { 1929 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL, 1930 firmware_kobj); 1931 if (!shutdown_actions_kset) 1932 goto fail; 1933 if (sysfs_create_group(&shutdown_actions_kset->kobj, 1934 &shutdown_action_attr_group)) 1935 goto fail; 1936 return; 1937 fail: 1938 panic("shutdown_triggers_init failed\n"); 1939 } 1940 1941 static void __init shutdown_actions_init(void) 1942 { 1943 int i; 1944 1945 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) { 1946 if (!shutdown_actions_list[i]->init) 1947 continue; 1948 shutdown_actions_list[i]->init_rc = 1949 shutdown_actions_list[i]->init(); 1950 } 1951 } 1952 1953 static int __init s390_ipl_init(void) 1954 { 1955 char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40}; 1956 1957 sclp_early_get_ipl_info(&sclp_ipl_info); 1958 /* 1959 * Fix loadparm: There are systems where the (SCSI) LOADPARM 1960 * returned by read SCP info is invalid (contains EBCDIC blanks) 1961 * when the system has been booted via diag308. In that case we use 1962 * the value from diag308, if available. 1963 * 1964 * There are also systems where diag308 store does not work in 1965 * case the system is booted from HMC. Fortunately in this case 1966 * READ SCP info provides the correct value. 1967 */ 1968 if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 && ipl_block_valid) 1969 memcpy(sclp_ipl_info.loadparm, ipl_block.ccw.loadparm, LOADPARM_LEN); 1970 shutdown_actions_init(); 1971 shutdown_triggers_init(); 1972 return 0; 1973 } 1974 1975 __initcall(s390_ipl_init); 1976 1977 static void __init strncpy_skip_quote(char *dst, char *src, int n) 1978 { 1979 int sx, dx; 1980 1981 dx = 0; 1982 for (sx = 0; src[sx] != 0; sx++) { 1983 if (src[sx] == '"') 1984 continue; 1985 dst[dx++] = src[sx]; 1986 if (dx >= n) 1987 break; 1988 } 1989 } 1990 1991 static int __init vmcmd_on_reboot_setup(char *str) 1992 { 1993 if (!MACHINE_IS_VM) 1994 return 1; 1995 strncpy_skip_quote(vmcmd_on_reboot, str, 127); 1996 vmcmd_on_reboot[127] = 0; 1997 on_reboot_trigger.action = &vmcmd_action; 1998 return 1; 1999 } 2000 __setup("vmreboot=", vmcmd_on_reboot_setup); 2001 2002 static int __init vmcmd_on_panic_setup(char *str) 2003 { 2004 if (!MACHINE_IS_VM) 2005 return 1; 2006 strncpy_skip_quote(vmcmd_on_panic, str, 127); 2007 vmcmd_on_panic[127] = 0; 2008 on_panic_trigger.action = &vmcmd_action; 2009 return 1; 2010 } 2011 __setup("vmpanic=", vmcmd_on_panic_setup); 2012 2013 static int __init vmcmd_on_halt_setup(char *str) 2014 { 2015 if (!MACHINE_IS_VM) 2016 return 1; 2017 strncpy_skip_quote(vmcmd_on_halt, str, 127); 2018 vmcmd_on_halt[127] = 0; 2019 on_halt_trigger.action = &vmcmd_action; 2020 return 1; 2021 } 2022 __setup("vmhalt=", vmcmd_on_halt_setup); 2023 2024 static int __init vmcmd_on_poff_setup(char *str) 2025 { 2026 if (!MACHINE_IS_VM) 2027 return 1; 2028 strncpy_skip_quote(vmcmd_on_poff, str, 127); 2029 vmcmd_on_poff[127] = 0; 2030 on_poff_trigger.action = &vmcmd_action; 2031 return 1; 2032 } 2033 __setup("vmpoff=", vmcmd_on_poff_setup); 2034 2035 static int on_panic_notify(struct notifier_block *self, 2036 unsigned long event, void *data) 2037 { 2038 do_panic(); 2039 return NOTIFY_OK; 2040 } 2041 2042 static struct notifier_block on_panic_nb = { 2043 .notifier_call = on_panic_notify, 2044 .priority = INT_MIN, 2045 }; 2046 2047 void __init setup_ipl(void) 2048 { 2049 BUILD_BUG_ON(sizeof(struct ipl_parameter_block) != PAGE_SIZE); 2050 2051 ipl_info.type = get_ipl_type(); 2052 switch (ipl_info.type) { 2053 case IPL_TYPE_CCW: 2054 ipl_info.data.ccw.dev_id.ssid = ipl_block.ccw.ssid; 2055 ipl_info.data.ccw.dev_id.devno = ipl_block.ccw.devno; 2056 break; 2057 case IPL_TYPE_FCP: 2058 case IPL_TYPE_FCP_DUMP: 2059 ipl_info.data.fcp.dev_id.ssid = 0; 2060 ipl_info.data.fcp.dev_id.devno = ipl_block.fcp.devno; 2061 ipl_info.data.fcp.wwpn = ipl_block.fcp.wwpn; 2062 ipl_info.data.fcp.lun = ipl_block.fcp.lun; 2063 break; 2064 case IPL_TYPE_NVME: 2065 case IPL_TYPE_NVME_DUMP: 2066 ipl_info.data.nvme.fid = ipl_block.nvme.fid; 2067 ipl_info.data.nvme.nsid = ipl_block.nvme.nsid; 2068 break; 2069 case IPL_TYPE_NSS: 2070 case IPL_TYPE_UNKNOWN: 2071 /* We have no info to copy */ 2072 break; 2073 } 2074 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb); 2075 } 2076 2077 void s390_reset_system(void) 2078 { 2079 /* Disable prefixing */ 2080 set_prefix(0); 2081 2082 /* Disable lowcore protection */ 2083 __ctl_clear_bit(0, 28); 2084 diag_dma_ops.diag308_reset(); 2085 } 2086 2087 #ifdef CONFIG_KEXEC_FILE 2088 2089 int ipl_report_add_component(struct ipl_report *report, struct kexec_buf *kbuf, 2090 unsigned char flags, unsigned short cert) 2091 { 2092 struct ipl_report_component *comp; 2093 2094 comp = vzalloc(sizeof(*comp)); 2095 if (!comp) 2096 return -ENOMEM; 2097 list_add_tail(&comp->list, &report->components); 2098 2099 comp->entry.addr = kbuf->mem; 2100 comp->entry.len = kbuf->memsz; 2101 comp->entry.flags = flags; 2102 comp->entry.certificate_index = cert; 2103 2104 report->size += sizeof(comp->entry); 2105 2106 return 0; 2107 } 2108 2109 int ipl_report_add_certificate(struct ipl_report *report, void *key, 2110 unsigned long addr, unsigned long len) 2111 { 2112 struct ipl_report_certificate *cert; 2113 2114 cert = vzalloc(sizeof(*cert)); 2115 if (!cert) 2116 return -ENOMEM; 2117 list_add_tail(&cert->list, &report->certificates); 2118 2119 cert->entry.addr = addr; 2120 cert->entry.len = len; 2121 cert->key = key; 2122 2123 report->size += sizeof(cert->entry); 2124 report->size += cert->entry.len; 2125 2126 return 0; 2127 } 2128 2129 struct ipl_report *ipl_report_init(struct ipl_parameter_block *ipib) 2130 { 2131 struct ipl_report *report; 2132 2133 report = vzalloc(sizeof(*report)); 2134 if (!report) 2135 return ERR_PTR(-ENOMEM); 2136 2137 report->ipib = ipib; 2138 INIT_LIST_HEAD(&report->components); 2139 INIT_LIST_HEAD(&report->certificates); 2140 2141 report->size = ALIGN(ipib->hdr.len, 8); 2142 report->size += sizeof(struct ipl_rl_hdr); 2143 report->size += sizeof(struct ipl_rb_components); 2144 report->size += sizeof(struct ipl_rb_certificates); 2145 2146 return report; 2147 } 2148 2149 void *ipl_report_finish(struct ipl_report *report) 2150 { 2151 struct ipl_report_certificate *cert; 2152 struct ipl_report_component *comp; 2153 struct ipl_rb_certificates *certs; 2154 struct ipl_parameter_block *ipib; 2155 struct ipl_rb_components *comps; 2156 struct ipl_rl_hdr *rl_hdr; 2157 void *buf, *ptr; 2158 2159 buf = vzalloc(report->size); 2160 if (!buf) 2161 return ERR_PTR(-ENOMEM); 2162 ptr = buf; 2163 2164 memcpy(ptr, report->ipib, report->ipib->hdr.len); 2165 ipib = ptr; 2166 if (ipl_secure_flag) 2167 ipib->hdr.flags |= IPL_PL_FLAG_SIPL; 2168 ipib->hdr.flags |= IPL_PL_FLAG_IPLSR; 2169 ptr += report->ipib->hdr.len; 2170 ptr = PTR_ALIGN(ptr, 8); 2171 2172 rl_hdr = ptr; 2173 ptr += sizeof(*rl_hdr); 2174 2175 comps = ptr; 2176 comps->rbt = IPL_RBT_COMPONENTS; 2177 ptr += sizeof(*comps); 2178 list_for_each_entry(comp, &report->components, list) { 2179 memcpy(ptr, &comp->entry, sizeof(comp->entry)); 2180 ptr += sizeof(comp->entry); 2181 } 2182 comps->len = ptr - (void *)comps; 2183 2184 certs = ptr; 2185 certs->rbt = IPL_RBT_CERTIFICATES; 2186 ptr += sizeof(*certs); 2187 list_for_each_entry(cert, &report->certificates, list) { 2188 memcpy(ptr, &cert->entry, sizeof(cert->entry)); 2189 ptr += sizeof(cert->entry); 2190 } 2191 certs->len = ptr - (void *)certs; 2192 rl_hdr->len = ptr - (void *)rl_hdr; 2193 2194 list_for_each_entry(cert, &report->certificates, list) { 2195 memcpy(ptr, cert->key, cert->entry.len); 2196 ptr += cert->entry.len; 2197 } 2198 2199 BUG_ON(ptr > buf + report->size); 2200 return buf; 2201 } 2202 2203 int ipl_report_free(struct ipl_report *report) 2204 { 2205 struct ipl_report_component *comp, *ncomp; 2206 struct ipl_report_certificate *cert, *ncert; 2207 2208 list_for_each_entry_safe(comp, ncomp, &report->components, list) 2209 vfree(comp); 2210 2211 list_for_each_entry_safe(cert, ncert, &report->certificates, list) 2212 vfree(cert); 2213 2214 vfree(report); 2215 2216 return 0; 2217 } 2218 2219 #endif 2220