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/panic_notifier.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/asm-extable.h> 23 #include <asm/diag.h> 24 #include <asm/ipl.h> 25 #include <asm/smp.h> 26 #include <asm/setup.h> 27 #include <asm/cpcmd.h> 28 #include <asm/ebcdic.h> 29 #include <asm/sclp.h> 30 #include <asm/checksum.h> 31 #include <asm/debug.h> 32 #include <asm/abs_lowcore.h> 33 #include <asm/os_info.h> 34 #include <asm/sections.h> 35 #include <asm/boot_data.h> 36 #include "entry.h" 37 38 #define IPL_PARM_BLOCK_VERSION 0 39 40 #define IPL_UNKNOWN_STR "unknown" 41 #define IPL_CCW_STR "ccw" 42 #define IPL_FCP_STR "fcp" 43 #define IPL_FCP_DUMP_STR "fcp_dump" 44 #define IPL_NVME_STR "nvme" 45 #define IPL_NVME_DUMP_STR "nvme_dump" 46 #define IPL_NSS_STR "nss" 47 48 #define DUMP_CCW_STR "ccw" 49 #define DUMP_FCP_STR "fcp" 50 #define DUMP_NVME_STR "nvme" 51 #define DUMP_NONE_STR "none" 52 53 /* 54 * Four shutdown trigger types are supported: 55 * - panic 56 * - halt 57 * - power off 58 * - reipl 59 * - restart 60 */ 61 #define ON_PANIC_STR "on_panic" 62 #define ON_HALT_STR "on_halt" 63 #define ON_POFF_STR "on_poff" 64 #define ON_REIPL_STR "on_reboot" 65 #define ON_RESTART_STR "on_restart" 66 67 struct shutdown_action; 68 struct shutdown_trigger { 69 char *name; 70 struct shutdown_action *action; 71 }; 72 73 /* 74 * The following shutdown action types are supported: 75 */ 76 #define SHUTDOWN_ACTION_IPL_STR "ipl" 77 #define SHUTDOWN_ACTION_REIPL_STR "reipl" 78 #define SHUTDOWN_ACTION_DUMP_STR "dump" 79 #define SHUTDOWN_ACTION_VMCMD_STR "vmcmd" 80 #define SHUTDOWN_ACTION_STOP_STR "stop" 81 #define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl" 82 83 struct shutdown_action { 84 char *name; 85 void (*fn) (struct shutdown_trigger *trigger); 86 int (*init) (void); 87 int init_rc; 88 }; 89 90 static char *ipl_type_str(enum ipl_type type) 91 { 92 switch (type) { 93 case IPL_TYPE_CCW: 94 return IPL_CCW_STR; 95 case IPL_TYPE_FCP: 96 return IPL_FCP_STR; 97 case IPL_TYPE_FCP_DUMP: 98 return IPL_FCP_DUMP_STR; 99 case IPL_TYPE_NSS: 100 return IPL_NSS_STR; 101 case IPL_TYPE_NVME: 102 return IPL_NVME_STR; 103 case IPL_TYPE_NVME_DUMP: 104 return IPL_NVME_DUMP_STR; 105 case IPL_TYPE_UNKNOWN: 106 default: 107 return IPL_UNKNOWN_STR; 108 } 109 } 110 111 enum dump_type { 112 DUMP_TYPE_NONE = 1, 113 DUMP_TYPE_CCW = 2, 114 DUMP_TYPE_FCP = 4, 115 DUMP_TYPE_NVME = 8, 116 }; 117 118 static char *dump_type_str(enum dump_type type) 119 { 120 switch (type) { 121 case DUMP_TYPE_NONE: 122 return DUMP_NONE_STR; 123 case DUMP_TYPE_CCW: 124 return DUMP_CCW_STR; 125 case DUMP_TYPE_FCP: 126 return DUMP_FCP_STR; 127 case DUMP_TYPE_NVME: 128 return DUMP_NVME_STR; 129 default: 130 return NULL; 131 } 132 } 133 134 int __bootdata_preserved(ipl_block_valid); 135 struct ipl_parameter_block __bootdata_preserved(ipl_block); 136 int __bootdata_preserved(ipl_secure_flag); 137 138 unsigned long __bootdata_preserved(ipl_cert_list_addr); 139 unsigned long __bootdata_preserved(ipl_cert_list_size); 140 141 unsigned long __bootdata(early_ipl_comp_list_addr); 142 unsigned long __bootdata(early_ipl_comp_list_size); 143 144 static int reipl_capabilities = IPL_TYPE_UNKNOWN; 145 146 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN; 147 static struct ipl_parameter_block *reipl_block_fcp; 148 static struct ipl_parameter_block *reipl_block_nvme; 149 static struct ipl_parameter_block *reipl_block_ccw; 150 static struct ipl_parameter_block *reipl_block_nss; 151 static struct ipl_parameter_block *reipl_block_actual; 152 153 static int dump_capabilities = DUMP_TYPE_NONE; 154 static enum dump_type dump_type = DUMP_TYPE_NONE; 155 static struct ipl_parameter_block *dump_block_fcp; 156 static struct ipl_parameter_block *dump_block_nvme; 157 static struct ipl_parameter_block *dump_block_ccw; 158 159 static struct sclp_ipl_info sclp_ipl_info; 160 161 static bool reipl_nvme_clear; 162 static bool reipl_fcp_clear; 163 static bool reipl_ccw_clear; 164 165 static inline int __diag308(unsigned long subcode, void *addr) 166 { 167 union register_pair r1; 168 169 r1.even = (unsigned long) addr; 170 r1.odd = 0; 171 asm volatile( 172 " diag %[r1],%[subcode],0x308\n" 173 "0: nopr %%r7\n" 174 EX_TABLE(0b,0b) 175 : [r1] "+&d" (r1.pair) 176 : [subcode] "d" (subcode) 177 : "cc", "memory"); 178 return r1.odd; 179 } 180 181 int diag308(unsigned long subcode, void *addr) 182 { 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 struct lowcore *abs_lc; 1647 unsigned long flags; 1648 unsigned int csum; 1649 1650 csum = (__force unsigned int) 1651 csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0); 1652 abs_lc = get_abs_lowcore(&flags); 1653 abs_lc->ipib = ipib; 1654 abs_lc->ipib_checksum = csum; 1655 put_abs_lowcore(abs_lc, flags); 1656 dump_run(trigger); 1657 } 1658 1659 static struct shutdown_action __refdata dump_reipl_action = { 1660 .name = SHUTDOWN_ACTION_DUMP_REIPL_STR, 1661 .fn = dump_reipl_run, 1662 }; 1663 1664 /* 1665 * vmcmd shutdown action: Trigger vm command on shutdown. 1666 */ 1667 1668 static char vmcmd_on_reboot[128]; 1669 static char vmcmd_on_panic[128]; 1670 static char vmcmd_on_halt[128]; 1671 static char vmcmd_on_poff[128]; 1672 static char vmcmd_on_restart[128]; 1673 1674 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot); 1675 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic); 1676 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt); 1677 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff); 1678 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart); 1679 1680 static struct attribute *vmcmd_attrs[] = { 1681 &sys_vmcmd_on_reboot_attr.attr, 1682 &sys_vmcmd_on_panic_attr.attr, 1683 &sys_vmcmd_on_halt_attr.attr, 1684 &sys_vmcmd_on_poff_attr.attr, 1685 &sys_vmcmd_on_restart_attr.attr, 1686 NULL, 1687 }; 1688 1689 static struct attribute_group vmcmd_attr_group = { 1690 .attrs = vmcmd_attrs, 1691 }; 1692 1693 static struct kset *vmcmd_kset; 1694 1695 static void vmcmd_run(struct shutdown_trigger *trigger) 1696 { 1697 char *cmd; 1698 1699 if (strcmp(trigger->name, ON_REIPL_STR) == 0) 1700 cmd = vmcmd_on_reboot; 1701 else if (strcmp(trigger->name, ON_PANIC_STR) == 0) 1702 cmd = vmcmd_on_panic; 1703 else if (strcmp(trigger->name, ON_HALT_STR) == 0) 1704 cmd = vmcmd_on_halt; 1705 else if (strcmp(trigger->name, ON_POFF_STR) == 0) 1706 cmd = vmcmd_on_poff; 1707 else if (strcmp(trigger->name, ON_RESTART_STR) == 0) 1708 cmd = vmcmd_on_restart; 1709 else 1710 return; 1711 1712 if (strlen(cmd) == 0) 1713 return; 1714 __cpcmd(cmd, NULL, 0, NULL); 1715 } 1716 1717 static int vmcmd_init(void) 1718 { 1719 if (!MACHINE_IS_VM) 1720 return -EOPNOTSUPP; 1721 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj); 1722 if (!vmcmd_kset) 1723 return -ENOMEM; 1724 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group); 1725 } 1726 1727 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR, 1728 vmcmd_run, vmcmd_init}; 1729 1730 /* 1731 * stop shutdown action: Stop Linux on shutdown. 1732 */ 1733 1734 static void stop_run(struct shutdown_trigger *trigger) 1735 { 1736 if (strcmp(trigger->name, ON_PANIC_STR) == 0 || 1737 strcmp(trigger->name, ON_RESTART_STR) == 0) 1738 disabled_wait(); 1739 smp_stop_cpu(); 1740 } 1741 1742 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR, 1743 stop_run, NULL}; 1744 1745 /* action list */ 1746 1747 static struct shutdown_action *shutdown_actions_list[] = { 1748 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action, 1749 &vmcmd_action, &stop_action}; 1750 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *)) 1751 1752 /* 1753 * Trigger section 1754 */ 1755 1756 static struct kset *shutdown_actions_kset; 1757 1758 static int set_trigger(const char *buf, struct shutdown_trigger *trigger, 1759 size_t len) 1760 { 1761 int i; 1762 1763 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) { 1764 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) { 1765 if (shutdown_actions_list[i]->init_rc) { 1766 return shutdown_actions_list[i]->init_rc; 1767 } else { 1768 trigger->action = shutdown_actions_list[i]; 1769 return len; 1770 } 1771 } 1772 } 1773 return -EINVAL; 1774 } 1775 1776 /* on reipl */ 1777 1778 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR, 1779 &reipl_action}; 1780 1781 static ssize_t on_reboot_show(struct kobject *kobj, 1782 struct kobj_attribute *attr, char *page) 1783 { 1784 return sprintf(page, "%s\n", on_reboot_trigger.action->name); 1785 } 1786 1787 static ssize_t on_reboot_store(struct kobject *kobj, 1788 struct kobj_attribute *attr, 1789 const char *buf, size_t len) 1790 { 1791 return set_trigger(buf, &on_reboot_trigger, len); 1792 } 1793 static struct kobj_attribute on_reboot_attr = __ATTR_RW(on_reboot); 1794 1795 static void do_machine_restart(char *__unused) 1796 { 1797 smp_send_stop(); 1798 on_reboot_trigger.action->fn(&on_reboot_trigger); 1799 reipl_run(NULL); 1800 } 1801 void (*_machine_restart)(char *command) = do_machine_restart; 1802 1803 /* on panic */ 1804 1805 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action}; 1806 1807 static ssize_t on_panic_show(struct kobject *kobj, 1808 struct kobj_attribute *attr, char *page) 1809 { 1810 return sprintf(page, "%s\n", on_panic_trigger.action->name); 1811 } 1812 1813 static ssize_t on_panic_store(struct kobject *kobj, 1814 struct kobj_attribute *attr, 1815 const char *buf, size_t len) 1816 { 1817 return set_trigger(buf, &on_panic_trigger, len); 1818 } 1819 static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic); 1820 1821 static void do_panic(void) 1822 { 1823 lgr_info_log(); 1824 on_panic_trigger.action->fn(&on_panic_trigger); 1825 stop_run(&on_panic_trigger); 1826 } 1827 1828 /* on restart */ 1829 1830 static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR, 1831 &stop_action}; 1832 1833 static ssize_t on_restart_show(struct kobject *kobj, 1834 struct kobj_attribute *attr, char *page) 1835 { 1836 return sprintf(page, "%s\n", on_restart_trigger.action->name); 1837 } 1838 1839 static ssize_t on_restart_store(struct kobject *kobj, 1840 struct kobj_attribute *attr, 1841 const char *buf, size_t len) 1842 { 1843 return set_trigger(buf, &on_restart_trigger, len); 1844 } 1845 static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart); 1846 1847 static void __do_restart(void *ignore) 1848 { 1849 smp_send_stop(); 1850 #ifdef CONFIG_CRASH_DUMP 1851 crash_kexec(NULL); 1852 #endif 1853 on_restart_trigger.action->fn(&on_restart_trigger); 1854 stop_run(&on_restart_trigger); 1855 } 1856 1857 void do_restart(void *arg) 1858 { 1859 tracing_off(); 1860 debug_locks_off(); 1861 lgr_info_log(); 1862 smp_call_online_cpu(__do_restart, arg); 1863 } 1864 1865 /* on halt */ 1866 1867 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action}; 1868 1869 static ssize_t on_halt_show(struct kobject *kobj, 1870 struct kobj_attribute *attr, char *page) 1871 { 1872 return sprintf(page, "%s\n", on_halt_trigger.action->name); 1873 } 1874 1875 static ssize_t on_halt_store(struct kobject *kobj, 1876 struct kobj_attribute *attr, 1877 const char *buf, size_t len) 1878 { 1879 return set_trigger(buf, &on_halt_trigger, len); 1880 } 1881 static struct kobj_attribute on_halt_attr = __ATTR_RW(on_halt); 1882 1883 static void do_machine_halt(void) 1884 { 1885 smp_send_stop(); 1886 on_halt_trigger.action->fn(&on_halt_trigger); 1887 stop_run(&on_halt_trigger); 1888 } 1889 void (*_machine_halt)(void) = do_machine_halt; 1890 1891 /* on power off */ 1892 1893 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action}; 1894 1895 static ssize_t on_poff_show(struct kobject *kobj, 1896 struct kobj_attribute *attr, char *page) 1897 { 1898 return sprintf(page, "%s\n", on_poff_trigger.action->name); 1899 } 1900 1901 static ssize_t on_poff_store(struct kobject *kobj, 1902 struct kobj_attribute *attr, 1903 const char *buf, size_t len) 1904 { 1905 return set_trigger(buf, &on_poff_trigger, len); 1906 } 1907 static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff); 1908 1909 static void do_machine_power_off(void) 1910 { 1911 smp_send_stop(); 1912 on_poff_trigger.action->fn(&on_poff_trigger); 1913 stop_run(&on_poff_trigger); 1914 } 1915 void (*_machine_power_off)(void) = do_machine_power_off; 1916 1917 static struct attribute *shutdown_action_attrs[] = { 1918 &on_restart_attr.attr, 1919 &on_reboot_attr.attr, 1920 &on_panic_attr.attr, 1921 &on_halt_attr.attr, 1922 &on_poff_attr.attr, 1923 NULL, 1924 }; 1925 1926 static struct attribute_group shutdown_action_attr_group = { 1927 .attrs = shutdown_action_attrs, 1928 }; 1929 1930 static void __init shutdown_triggers_init(void) 1931 { 1932 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL, 1933 firmware_kobj); 1934 if (!shutdown_actions_kset) 1935 goto fail; 1936 if (sysfs_create_group(&shutdown_actions_kset->kobj, 1937 &shutdown_action_attr_group)) 1938 goto fail; 1939 return; 1940 fail: 1941 panic("shutdown_triggers_init failed\n"); 1942 } 1943 1944 static void __init shutdown_actions_init(void) 1945 { 1946 int i; 1947 1948 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) { 1949 if (!shutdown_actions_list[i]->init) 1950 continue; 1951 shutdown_actions_list[i]->init_rc = 1952 shutdown_actions_list[i]->init(); 1953 } 1954 } 1955 1956 static int __init s390_ipl_init(void) 1957 { 1958 char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40}; 1959 1960 sclp_early_get_ipl_info(&sclp_ipl_info); 1961 /* 1962 * Fix loadparm: There are systems where the (SCSI) LOADPARM 1963 * returned by read SCP info is invalid (contains EBCDIC blanks) 1964 * when the system has been booted via diag308. In that case we use 1965 * the value from diag308, if available. 1966 * 1967 * There are also systems where diag308 store does not work in 1968 * case the system is booted from HMC. Fortunately in this case 1969 * READ SCP info provides the correct value. 1970 */ 1971 if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 && ipl_block_valid) 1972 memcpy(sclp_ipl_info.loadparm, ipl_block.ccw.loadparm, LOADPARM_LEN); 1973 shutdown_actions_init(); 1974 shutdown_triggers_init(); 1975 return 0; 1976 } 1977 1978 __initcall(s390_ipl_init); 1979 1980 static void __init strncpy_skip_quote(char *dst, char *src, int n) 1981 { 1982 int sx, dx; 1983 1984 dx = 0; 1985 for (sx = 0; src[sx] != 0; sx++) { 1986 if (src[sx] == '"') 1987 continue; 1988 dst[dx++] = src[sx]; 1989 if (dx >= n) 1990 break; 1991 } 1992 } 1993 1994 static int __init vmcmd_on_reboot_setup(char *str) 1995 { 1996 if (!MACHINE_IS_VM) 1997 return 1; 1998 strncpy_skip_quote(vmcmd_on_reboot, str, 127); 1999 vmcmd_on_reboot[127] = 0; 2000 on_reboot_trigger.action = &vmcmd_action; 2001 return 1; 2002 } 2003 __setup("vmreboot=", vmcmd_on_reboot_setup); 2004 2005 static int __init vmcmd_on_panic_setup(char *str) 2006 { 2007 if (!MACHINE_IS_VM) 2008 return 1; 2009 strncpy_skip_quote(vmcmd_on_panic, str, 127); 2010 vmcmd_on_panic[127] = 0; 2011 on_panic_trigger.action = &vmcmd_action; 2012 return 1; 2013 } 2014 __setup("vmpanic=", vmcmd_on_panic_setup); 2015 2016 static int __init vmcmd_on_halt_setup(char *str) 2017 { 2018 if (!MACHINE_IS_VM) 2019 return 1; 2020 strncpy_skip_quote(vmcmd_on_halt, str, 127); 2021 vmcmd_on_halt[127] = 0; 2022 on_halt_trigger.action = &vmcmd_action; 2023 return 1; 2024 } 2025 __setup("vmhalt=", vmcmd_on_halt_setup); 2026 2027 static int __init vmcmd_on_poff_setup(char *str) 2028 { 2029 if (!MACHINE_IS_VM) 2030 return 1; 2031 strncpy_skip_quote(vmcmd_on_poff, str, 127); 2032 vmcmd_on_poff[127] = 0; 2033 on_poff_trigger.action = &vmcmd_action; 2034 return 1; 2035 } 2036 __setup("vmpoff=", vmcmd_on_poff_setup); 2037 2038 static int on_panic_notify(struct notifier_block *self, 2039 unsigned long event, void *data) 2040 { 2041 do_panic(); 2042 return NOTIFY_OK; 2043 } 2044 2045 static struct notifier_block on_panic_nb = { 2046 .notifier_call = on_panic_notify, 2047 .priority = INT_MIN, 2048 }; 2049 2050 void __init setup_ipl(void) 2051 { 2052 BUILD_BUG_ON(sizeof(struct ipl_parameter_block) != PAGE_SIZE); 2053 2054 ipl_info.type = get_ipl_type(); 2055 switch (ipl_info.type) { 2056 case IPL_TYPE_CCW: 2057 ipl_info.data.ccw.dev_id.ssid = ipl_block.ccw.ssid; 2058 ipl_info.data.ccw.dev_id.devno = ipl_block.ccw.devno; 2059 break; 2060 case IPL_TYPE_FCP: 2061 case IPL_TYPE_FCP_DUMP: 2062 ipl_info.data.fcp.dev_id.ssid = 0; 2063 ipl_info.data.fcp.dev_id.devno = ipl_block.fcp.devno; 2064 ipl_info.data.fcp.wwpn = ipl_block.fcp.wwpn; 2065 ipl_info.data.fcp.lun = ipl_block.fcp.lun; 2066 break; 2067 case IPL_TYPE_NVME: 2068 case IPL_TYPE_NVME_DUMP: 2069 ipl_info.data.nvme.fid = ipl_block.nvme.fid; 2070 ipl_info.data.nvme.nsid = ipl_block.nvme.nsid; 2071 break; 2072 case IPL_TYPE_NSS: 2073 case IPL_TYPE_UNKNOWN: 2074 /* We have no info to copy */ 2075 break; 2076 } 2077 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb); 2078 } 2079 2080 void s390_reset_system(void) 2081 { 2082 /* Disable prefixing */ 2083 set_prefix(0); 2084 2085 /* Disable lowcore protection */ 2086 __ctl_clear_bit(0, 28); 2087 diag_amode31_ops.diag308_reset(); 2088 } 2089 2090 #ifdef CONFIG_KEXEC_FILE 2091 2092 int ipl_report_add_component(struct ipl_report *report, struct kexec_buf *kbuf, 2093 unsigned char flags, unsigned short cert) 2094 { 2095 struct ipl_report_component *comp; 2096 2097 comp = vzalloc(sizeof(*comp)); 2098 if (!comp) 2099 return -ENOMEM; 2100 list_add_tail(&comp->list, &report->components); 2101 2102 comp->entry.addr = kbuf->mem; 2103 comp->entry.len = kbuf->memsz; 2104 comp->entry.flags = flags; 2105 comp->entry.certificate_index = cert; 2106 2107 report->size += sizeof(comp->entry); 2108 2109 return 0; 2110 } 2111 2112 int ipl_report_add_certificate(struct ipl_report *report, void *key, 2113 unsigned long addr, unsigned long len) 2114 { 2115 struct ipl_report_certificate *cert; 2116 2117 cert = vzalloc(sizeof(*cert)); 2118 if (!cert) 2119 return -ENOMEM; 2120 list_add_tail(&cert->list, &report->certificates); 2121 2122 cert->entry.addr = addr; 2123 cert->entry.len = len; 2124 cert->key = key; 2125 2126 report->size += sizeof(cert->entry); 2127 report->size += cert->entry.len; 2128 2129 return 0; 2130 } 2131 2132 struct ipl_report *ipl_report_init(struct ipl_parameter_block *ipib) 2133 { 2134 struct ipl_report *report; 2135 2136 report = vzalloc(sizeof(*report)); 2137 if (!report) 2138 return ERR_PTR(-ENOMEM); 2139 2140 report->ipib = ipib; 2141 INIT_LIST_HEAD(&report->components); 2142 INIT_LIST_HEAD(&report->certificates); 2143 2144 report->size = ALIGN(ipib->hdr.len, 8); 2145 report->size += sizeof(struct ipl_rl_hdr); 2146 report->size += sizeof(struct ipl_rb_components); 2147 report->size += sizeof(struct ipl_rb_certificates); 2148 2149 return report; 2150 } 2151 2152 void *ipl_report_finish(struct ipl_report *report) 2153 { 2154 struct ipl_report_certificate *cert; 2155 struct ipl_report_component *comp; 2156 struct ipl_rb_certificates *certs; 2157 struct ipl_parameter_block *ipib; 2158 struct ipl_rb_components *comps; 2159 struct ipl_rl_hdr *rl_hdr; 2160 void *buf, *ptr; 2161 2162 buf = vzalloc(report->size); 2163 if (!buf) 2164 goto out; 2165 ptr = buf; 2166 2167 memcpy(ptr, report->ipib, report->ipib->hdr.len); 2168 ipib = ptr; 2169 if (ipl_secure_flag) 2170 ipib->hdr.flags |= IPL_PL_FLAG_SIPL; 2171 ipib->hdr.flags |= IPL_PL_FLAG_IPLSR; 2172 ptr += report->ipib->hdr.len; 2173 ptr = PTR_ALIGN(ptr, 8); 2174 2175 rl_hdr = ptr; 2176 ptr += sizeof(*rl_hdr); 2177 2178 comps = ptr; 2179 comps->rbt = IPL_RBT_COMPONENTS; 2180 ptr += sizeof(*comps); 2181 list_for_each_entry(comp, &report->components, list) { 2182 memcpy(ptr, &comp->entry, sizeof(comp->entry)); 2183 ptr += sizeof(comp->entry); 2184 } 2185 comps->len = ptr - (void *)comps; 2186 2187 certs = ptr; 2188 certs->rbt = IPL_RBT_CERTIFICATES; 2189 ptr += sizeof(*certs); 2190 list_for_each_entry(cert, &report->certificates, list) { 2191 memcpy(ptr, &cert->entry, sizeof(cert->entry)); 2192 ptr += sizeof(cert->entry); 2193 } 2194 certs->len = ptr - (void *)certs; 2195 rl_hdr->len = ptr - (void *)rl_hdr; 2196 2197 list_for_each_entry(cert, &report->certificates, list) { 2198 memcpy(ptr, cert->key, cert->entry.len); 2199 ptr += cert->entry.len; 2200 } 2201 2202 BUG_ON(ptr > buf + report->size); 2203 out: 2204 return buf; 2205 } 2206 2207 int ipl_report_free(struct ipl_report *report) 2208 { 2209 struct ipl_report_component *comp, *ncomp; 2210 struct ipl_report_certificate *cert, *ncert; 2211 2212 list_for_each_entry_safe(comp, ncomp, &report->components, list) 2213 vfree(comp); 2214 2215 list_for_each_entry_safe(cert, ncert, &report->certificates, list) 2216 vfree(cert); 2217 2218 vfree(report); 2219 2220 return 0; 2221 } 2222 2223 #endif 2224