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/cio.h> 28 #include <asm/ebcdic.h> 29 #include <asm/reset.h> 30 #include <asm/sclp.h> 31 #include <asm/checksum.h> 32 #include <asm/debug.h> 33 #include <asm/os_info.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_NSS_STR "nss" 43 44 #define DUMP_CCW_STR "ccw" 45 #define DUMP_FCP_STR "fcp" 46 #define DUMP_NONE_STR "none" 47 48 /* 49 * Four shutdown trigger types are supported: 50 * - panic 51 * - halt 52 * - power off 53 * - reipl 54 * - restart 55 */ 56 #define ON_PANIC_STR "on_panic" 57 #define ON_HALT_STR "on_halt" 58 #define ON_POFF_STR "on_poff" 59 #define ON_REIPL_STR "on_reboot" 60 #define ON_RESTART_STR "on_restart" 61 62 struct shutdown_action; 63 struct shutdown_trigger { 64 char *name; 65 struct shutdown_action *action; 66 }; 67 68 /* 69 * The following shutdown action types are supported: 70 */ 71 #define SHUTDOWN_ACTION_IPL_STR "ipl" 72 #define SHUTDOWN_ACTION_REIPL_STR "reipl" 73 #define SHUTDOWN_ACTION_DUMP_STR "dump" 74 #define SHUTDOWN_ACTION_VMCMD_STR "vmcmd" 75 #define SHUTDOWN_ACTION_STOP_STR "stop" 76 #define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl" 77 78 struct shutdown_action { 79 char *name; 80 void (*fn) (struct shutdown_trigger *trigger); 81 int (*init) (void); 82 int init_rc; 83 }; 84 85 static char *ipl_type_str(enum ipl_type type) 86 { 87 switch (type) { 88 case IPL_TYPE_CCW: 89 return IPL_CCW_STR; 90 case IPL_TYPE_FCP: 91 return IPL_FCP_STR; 92 case IPL_TYPE_FCP_DUMP: 93 return IPL_FCP_DUMP_STR; 94 case IPL_TYPE_NSS: 95 return IPL_NSS_STR; 96 case IPL_TYPE_UNKNOWN: 97 default: 98 return IPL_UNKNOWN_STR; 99 } 100 } 101 102 enum dump_type { 103 DUMP_TYPE_NONE = 1, 104 DUMP_TYPE_CCW = 2, 105 DUMP_TYPE_FCP = 4, 106 }; 107 108 static char *dump_type_str(enum dump_type type) 109 { 110 switch (type) { 111 case DUMP_TYPE_NONE: 112 return DUMP_NONE_STR; 113 case DUMP_TYPE_CCW: 114 return DUMP_CCW_STR; 115 case DUMP_TYPE_FCP: 116 return DUMP_FCP_STR; 117 default: 118 return NULL; 119 } 120 } 121 122 static u8 ipl_ssid; 123 static u16 ipl_devno; 124 u32 ipl_flags; 125 126 enum ipl_method { 127 REIPL_METHOD_CCW_CIO, 128 REIPL_METHOD_CCW_DIAG, 129 REIPL_METHOD_CCW_VM, 130 REIPL_METHOD_FCP_RO_DIAG, 131 REIPL_METHOD_FCP_RW_DIAG, 132 REIPL_METHOD_FCP_RO_VM, 133 REIPL_METHOD_FCP_DUMP, 134 REIPL_METHOD_NSS, 135 REIPL_METHOD_NSS_DIAG, 136 REIPL_METHOD_DEFAULT, 137 }; 138 139 enum dump_method { 140 DUMP_METHOD_NONE, 141 DUMP_METHOD_CCW_CIO, 142 DUMP_METHOD_CCW_DIAG, 143 DUMP_METHOD_CCW_VM, 144 DUMP_METHOD_FCP_DIAG, 145 }; 146 147 static int diag308_set_works; 148 149 static struct ipl_parameter_block ipl_block; 150 151 static int reipl_capabilities = IPL_TYPE_UNKNOWN; 152 153 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN; 154 static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT; 155 static struct ipl_parameter_block *reipl_block_fcp; 156 static struct ipl_parameter_block *reipl_block_ccw; 157 static struct ipl_parameter_block *reipl_block_nss; 158 static struct ipl_parameter_block *reipl_block_actual; 159 160 static int dump_capabilities = DUMP_TYPE_NONE; 161 static enum dump_type dump_type = DUMP_TYPE_NONE; 162 static enum dump_method dump_method = DUMP_METHOD_NONE; 163 static struct ipl_parameter_block *dump_block_fcp; 164 static struct ipl_parameter_block *dump_block_ccw; 165 166 static struct sclp_ipl_info sclp_ipl_info; 167 168 static inline int __diag308(unsigned long subcode, void *addr) 169 { 170 register unsigned long _addr asm("0") = (unsigned long) addr; 171 register unsigned long _rc asm("1") = 0; 172 173 asm volatile( 174 " diag %0,%2,0x308\n" 175 "0: nopr %%r7\n" 176 EX_TABLE(0b,0b) 177 : "+d" (_addr), "+d" (_rc) 178 : "d" (subcode) : "cc", "memory"); 179 return _rc; 180 } 181 182 int diag308(unsigned long subcode, void *addr) 183 { 184 diag_stat_inc(DIAG_STAT_X308); 185 return __diag308(subcode, addr); 186 } 187 EXPORT_SYMBOL_GPL(diag308); 188 189 /* SYSFS */ 190 191 #define IPL_ATTR_SHOW_FN(_prefix, _name, _format, args...) \ 192 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \ 193 struct kobj_attribute *attr, \ 194 char *page) \ 195 { \ 196 return snprintf(page, PAGE_SIZE, _format, ##args); \ 197 } 198 199 #define IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk) \ 200 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \ 201 struct kobj_attribute *attr, \ 202 const char *buf, size_t len) \ 203 { \ 204 unsigned long long ssid, devno; \ 205 \ 206 if (sscanf(buf, "0.%llx.%llx\n", &ssid, &devno) != 2) \ 207 return -EINVAL; \ 208 \ 209 if (ssid > __MAX_SSID || devno > __MAX_SUBCHANNEL) \ 210 return -EINVAL; \ 211 \ 212 _ipl_blk.ssid = ssid; \ 213 _ipl_blk.devno = devno; \ 214 return len; \ 215 } 216 217 #define DEFINE_IPL_CCW_ATTR_RW(_prefix, _name, _ipl_blk) \ 218 IPL_ATTR_SHOW_FN(_prefix, _name, "0.%x.%04x\n", \ 219 _ipl_blk.ssid, _ipl_blk.devno); \ 220 IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk); \ 221 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ 222 __ATTR(_name, (S_IRUGO | S_IWUSR), \ 223 sys_##_prefix##_##_name##_show, \ 224 sys_##_prefix##_##_name##_store) \ 225 226 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \ 227 IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value) \ 228 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ 229 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL) 230 231 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \ 232 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value) \ 233 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \ 234 struct kobj_attribute *attr, \ 235 const char *buf, size_t len) \ 236 { \ 237 unsigned long long value; \ 238 if (sscanf(buf, _fmt_in, &value) != 1) \ 239 return -EINVAL; \ 240 _value = value; \ 241 return len; \ 242 } \ 243 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ 244 __ATTR(_name,(S_IRUGO | S_IWUSR), \ 245 sys_##_prefix##_##_name##_show, \ 246 sys_##_prefix##_##_name##_store) 247 248 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\ 249 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, _value) \ 250 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \ 251 struct kobj_attribute *attr, \ 252 const char *buf, size_t len) \ 253 { \ 254 strncpy(_value, buf, sizeof(_value) - 1); \ 255 strim(_value); \ 256 return len; \ 257 } \ 258 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ 259 __ATTR(_name,(S_IRUGO | S_IWUSR), \ 260 sys_##_prefix##_##_name##_show, \ 261 sys_##_prefix##_##_name##_store) 262 263 static void make_attrs_ro(struct attribute **attrs) 264 { 265 while (*attrs) { 266 (*attrs)->mode = S_IRUGO; 267 attrs++; 268 } 269 } 270 271 /* 272 * ipl section 273 */ 274 275 static __init enum ipl_type get_ipl_type(void) 276 { 277 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START; 278 279 if (!(ipl_flags & IPL_DEVNO_VALID)) 280 return IPL_TYPE_UNKNOWN; 281 if (!(ipl_flags & IPL_PARMBLOCK_VALID)) 282 return IPL_TYPE_CCW; 283 if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION) 284 return IPL_TYPE_UNKNOWN; 285 if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP) 286 return IPL_TYPE_UNKNOWN; 287 if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP) 288 return IPL_TYPE_FCP_DUMP; 289 return IPL_TYPE_FCP; 290 } 291 292 struct ipl_info ipl_info; 293 EXPORT_SYMBOL_GPL(ipl_info); 294 295 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr, 296 char *page) 297 { 298 return sprintf(page, "%s\n", ipl_type_str(ipl_info.type)); 299 } 300 301 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type); 302 303 /* VM IPL PARM routines */ 304 static size_t reipl_get_ascii_vmparm(char *dest, size_t size, 305 const struct ipl_parameter_block *ipb) 306 { 307 int i; 308 size_t len; 309 char has_lowercase = 0; 310 311 len = 0; 312 if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) && 313 (ipb->ipl_info.ccw.vm_parm_len > 0)) { 314 315 len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len); 316 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len); 317 /* If at least one character is lowercase, we assume mixed 318 * case; otherwise we convert everything to lowercase. 319 */ 320 for (i = 0; i < len; i++) 321 if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */ 322 (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */ 323 (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */ 324 has_lowercase = 1; 325 break; 326 } 327 if (!has_lowercase) 328 EBC_TOLOWER(dest, len); 329 EBCASC(dest, len); 330 } 331 dest[len] = 0; 332 333 return len; 334 } 335 336 size_t append_ipl_vmparm(char *dest, size_t size) 337 { 338 size_t rc; 339 340 rc = 0; 341 if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW)) 342 rc = reipl_get_ascii_vmparm(dest, size, &ipl_block); 343 else 344 dest[0] = 0; 345 return rc; 346 } 347 348 static ssize_t ipl_vm_parm_show(struct kobject *kobj, 349 struct kobj_attribute *attr, char *page) 350 { 351 char parm[DIAG308_VMPARM_SIZE + 1] = {}; 352 353 append_ipl_vmparm(parm, sizeof(parm)); 354 return sprintf(page, "%s\n", parm); 355 } 356 357 static size_t scpdata_length(const char* buf, size_t count) 358 { 359 while (count) { 360 if (buf[count - 1] != '\0' && buf[count - 1] != ' ') 361 break; 362 count--; 363 } 364 return count; 365 } 366 367 static size_t reipl_append_ascii_scpdata(char *dest, size_t size, 368 const struct ipl_parameter_block *ipb) 369 { 370 size_t count; 371 size_t i; 372 int has_lowercase; 373 374 count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data, 375 ipb->ipl_info.fcp.scp_data_len)); 376 if (!count) 377 goto out; 378 379 has_lowercase = 0; 380 for (i = 0; i < count; i++) { 381 if (!isascii(ipb->ipl_info.fcp.scp_data[i])) { 382 count = 0; 383 goto out; 384 } 385 if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i])) 386 has_lowercase = 1; 387 } 388 389 if (has_lowercase) 390 memcpy(dest, ipb->ipl_info.fcp.scp_data, count); 391 else 392 for (i = 0; i < count; i++) 393 dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]); 394 out: 395 dest[count] = '\0'; 396 return count; 397 } 398 399 size_t append_ipl_scpdata(char *dest, size_t len) 400 { 401 size_t rc; 402 403 rc = 0; 404 if (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP) 405 rc = reipl_append_ascii_scpdata(dest, len, &ipl_block); 406 else 407 dest[0] = 0; 408 return rc; 409 } 410 411 412 static struct kobj_attribute sys_ipl_vm_parm_attr = 413 __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL); 414 415 static ssize_t sys_ipl_device_show(struct kobject *kobj, 416 struct kobj_attribute *attr, char *page) 417 { 418 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START; 419 420 switch (ipl_info.type) { 421 case IPL_TYPE_CCW: 422 return sprintf(page, "0.%x.%04x\n", ipl_ssid, ipl_devno); 423 case IPL_TYPE_FCP: 424 case IPL_TYPE_FCP_DUMP: 425 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno); 426 default: 427 return 0; 428 } 429 } 430 431 static struct kobj_attribute sys_ipl_device_attr = 432 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL); 433 434 static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj, 435 struct bin_attribute *attr, char *buf, 436 loff_t off, size_t count) 437 { 438 return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START, 439 IPL_PARMBLOCK_SIZE); 440 } 441 static struct bin_attribute ipl_parameter_attr = 442 __BIN_ATTR(binary_parameter, S_IRUGO, ipl_parameter_read, NULL, 443 PAGE_SIZE); 444 445 static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj, 446 struct bin_attribute *attr, char *buf, 447 loff_t off, size_t count) 448 { 449 unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len; 450 void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data; 451 452 return memory_read_from_buffer(buf, count, &off, scp_data, size); 453 } 454 static struct bin_attribute ipl_scp_data_attr = 455 __BIN_ATTR(scp_data, S_IRUGO, ipl_scp_data_read, NULL, PAGE_SIZE); 456 457 static struct bin_attribute *ipl_fcp_bin_attrs[] = { 458 &ipl_parameter_attr, 459 &ipl_scp_data_attr, 460 NULL, 461 }; 462 463 /* FCP ipl device attributes */ 464 465 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long) 466 IPL_PARMBLOCK_START->ipl_info.fcp.wwpn); 467 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long) 468 IPL_PARMBLOCK_START->ipl_info.fcp.lun); 469 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long) 470 IPL_PARMBLOCK_START->ipl_info.fcp.bootprog); 471 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long) 472 IPL_PARMBLOCK_START->ipl_info.fcp.br_lba); 473 474 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj, 475 struct kobj_attribute *attr, char *page) 476 { 477 char loadparm[LOADPARM_LEN + 1] = {}; 478 479 if (!sclp_ipl_info.is_valid) 480 return sprintf(page, "#unknown#\n"); 481 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN); 482 EBCASC(loadparm, LOADPARM_LEN); 483 strim(loadparm); 484 return sprintf(page, "%s\n", loadparm); 485 } 486 487 static struct kobj_attribute sys_ipl_ccw_loadparm_attr = 488 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL); 489 490 static struct attribute *ipl_fcp_attrs[] = { 491 &sys_ipl_type_attr.attr, 492 &sys_ipl_device_attr.attr, 493 &sys_ipl_fcp_wwpn_attr.attr, 494 &sys_ipl_fcp_lun_attr.attr, 495 &sys_ipl_fcp_bootprog_attr.attr, 496 &sys_ipl_fcp_br_lba_attr.attr, 497 &sys_ipl_ccw_loadparm_attr.attr, 498 NULL, 499 }; 500 501 static struct attribute_group ipl_fcp_attr_group = { 502 .attrs = ipl_fcp_attrs, 503 .bin_attrs = ipl_fcp_bin_attrs, 504 }; 505 506 /* CCW ipl device attributes */ 507 508 static struct attribute *ipl_ccw_attrs_vm[] = { 509 &sys_ipl_type_attr.attr, 510 &sys_ipl_device_attr.attr, 511 &sys_ipl_ccw_loadparm_attr.attr, 512 &sys_ipl_vm_parm_attr.attr, 513 NULL, 514 }; 515 516 static struct attribute *ipl_ccw_attrs_lpar[] = { 517 &sys_ipl_type_attr.attr, 518 &sys_ipl_device_attr.attr, 519 &sys_ipl_ccw_loadparm_attr.attr, 520 NULL, 521 }; 522 523 static struct attribute_group ipl_ccw_attr_group_vm = { 524 .attrs = ipl_ccw_attrs_vm, 525 }; 526 527 static struct attribute_group ipl_ccw_attr_group_lpar = { 528 .attrs = ipl_ccw_attrs_lpar 529 }; 530 531 /* UNKNOWN ipl device attributes */ 532 533 static struct attribute *ipl_unknown_attrs[] = { 534 &sys_ipl_type_attr.attr, 535 NULL, 536 }; 537 538 static struct attribute_group ipl_unknown_attr_group = { 539 .attrs = ipl_unknown_attrs, 540 }; 541 542 static struct kset *ipl_kset; 543 544 static void __ipl_run(void *unused) 545 { 546 diag308(DIAG308_LOAD_CLEAR, NULL); 547 if (MACHINE_IS_VM) 548 __cpcmd("IPL", NULL, 0, NULL); 549 else if (ipl_info.type == IPL_TYPE_CCW) 550 reipl_ccw_dev(&ipl_info.data.ccw.dev_id); 551 } 552 553 static void ipl_run(struct shutdown_trigger *trigger) 554 { 555 smp_call_ipl_cpu(__ipl_run, NULL); 556 } 557 558 static int __init ipl_init(void) 559 { 560 int rc; 561 562 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj); 563 if (!ipl_kset) { 564 rc = -ENOMEM; 565 goto out; 566 } 567 switch (ipl_info.type) { 568 case IPL_TYPE_CCW: 569 if (MACHINE_IS_VM) 570 rc = sysfs_create_group(&ipl_kset->kobj, 571 &ipl_ccw_attr_group_vm); 572 else 573 rc = sysfs_create_group(&ipl_kset->kobj, 574 &ipl_ccw_attr_group_lpar); 575 break; 576 case IPL_TYPE_FCP: 577 case IPL_TYPE_FCP_DUMP: 578 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group); 579 break; 580 default: 581 rc = sysfs_create_group(&ipl_kset->kobj, 582 &ipl_unknown_attr_group); 583 break; 584 } 585 out: 586 if (rc) 587 panic("ipl_init failed: rc = %i\n", rc); 588 589 return 0; 590 } 591 592 static struct shutdown_action __refdata ipl_action = { 593 .name = SHUTDOWN_ACTION_IPL_STR, 594 .fn = ipl_run, 595 .init = ipl_init, 596 }; 597 598 /* 599 * reipl shutdown action: Reboot Linux on shutdown. 600 */ 601 602 /* VM IPL PARM attributes */ 603 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb, 604 char *page) 605 { 606 char vmparm[DIAG308_VMPARM_SIZE + 1] = {}; 607 608 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb); 609 return sprintf(page, "%s\n", vmparm); 610 } 611 612 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb, 613 size_t vmparm_max, 614 const char *buf, size_t len) 615 { 616 int i, ip_len; 617 618 /* ignore trailing newline */ 619 ip_len = len; 620 if ((len > 0) && (buf[len - 1] == '\n')) 621 ip_len--; 622 623 if (ip_len > vmparm_max) 624 return -EINVAL; 625 626 /* parm is used to store kernel options, check for common chars */ 627 for (i = 0; i < ip_len; i++) 628 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i]))) 629 return -EINVAL; 630 631 memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE); 632 ipb->ipl_info.ccw.vm_parm_len = ip_len; 633 if (ip_len > 0) { 634 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID; 635 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len); 636 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len); 637 } else { 638 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID; 639 } 640 641 return len; 642 } 643 644 /* NSS wrapper */ 645 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj, 646 struct kobj_attribute *attr, char *page) 647 { 648 return reipl_generic_vmparm_show(reipl_block_nss, page); 649 } 650 651 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj, 652 struct kobj_attribute *attr, 653 const char *buf, size_t len) 654 { 655 return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len); 656 } 657 658 /* CCW wrapper */ 659 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj, 660 struct kobj_attribute *attr, char *page) 661 { 662 return reipl_generic_vmparm_show(reipl_block_ccw, page); 663 } 664 665 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj, 666 struct kobj_attribute *attr, 667 const char *buf, size_t len) 668 { 669 return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len); 670 } 671 672 static struct kobj_attribute sys_reipl_nss_vmparm_attr = 673 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show, 674 reipl_nss_vmparm_store); 675 static struct kobj_attribute sys_reipl_ccw_vmparm_attr = 676 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show, 677 reipl_ccw_vmparm_store); 678 679 /* FCP reipl device attributes */ 680 681 static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj, 682 struct bin_attribute *attr, 683 char *buf, loff_t off, size_t count) 684 { 685 size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len; 686 void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data; 687 688 return memory_read_from_buffer(buf, count, &off, scp_data, size); 689 } 690 691 static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj, 692 struct bin_attribute *attr, 693 char *buf, loff_t off, size_t count) 694 { 695 size_t scpdata_len = count; 696 size_t padding; 697 698 699 if (off) 700 return -EINVAL; 701 702 memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf, count); 703 if (scpdata_len % 8) { 704 padding = 8 - (scpdata_len % 8); 705 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len, 706 0, padding); 707 scpdata_len += padding; 708 } 709 710 reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len; 711 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len; 712 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len; 713 714 return count; 715 } 716 static struct bin_attribute sys_reipl_fcp_scp_data_attr = 717 __BIN_ATTR(scp_data, (S_IRUGO | S_IWUSR), reipl_fcp_scpdata_read, 718 reipl_fcp_scpdata_write, DIAG308_SCPDATA_SIZE); 719 720 static struct bin_attribute *reipl_fcp_bin_attrs[] = { 721 &sys_reipl_fcp_scp_data_attr, 722 NULL, 723 }; 724 725 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n", 726 reipl_block_fcp->ipl_info.fcp.wwpn); 727 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n", 728 reipl_block_fcp->ipl_info.fcp.lun); 729 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n", 730 reipl_block_fcp->ipl_info.fcp.bootprog); 731 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n", 732 reipl_block_fcp->ipl_info.fcp.br_lba); 733 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n", 734 reipl_block_fcp->ipl_info.fcp.devno); 735 736 static void reipl_get_ascii_loadparm(char *loadparm, 737 struct ipl_parameter_block *ibp) 738 { 739 memcpy(loadparm, ibp->hdr.loadparm, LOADPARM_LEN); 740 EBCASC(loadparm, LOADPARM_LEN); 741 loadparm[LOADPARM_LEN] = 0; 742 strim(loadparm); 743 } 744 745 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb, 746 char *page) 747 { 748 char buf[LOADPARM_LEN + 1]; 749 750 reipl_get_ascii_loadparm(buf, ipb); 751 return sprintf(page, "%s\n", buf); 752 } 753 754 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb, 755 const char *buf, size_t len) 756 { 757 int i, lp_len; 758 759 /* ignore trailing newline */ 760 lp_len = len; 761 if ((len > 0) && (buf[len - 1] == '\n')) 762 lp_len--; 763 /* loadparm can have max 8 characters and must not start with a blank */ 764 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' '))) 765 return -EINVAL; 766 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */ 767 for (i = 0; i < lp_len; i++) { 768 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') || 769 (buf[i] == '.')) 770 continue; 771 return -EINVAL; 772 } 773 /* initialize loadparm with blanks */ 774 memset(ipb->hdr.loadparm, ' ', LOADPARM_LEN); 775 /* copy and convert to ebcdic */ 776 memcpy(ipb->hdr.loadparm, buf, lp_len); 777 ASCEBC(ipb->hdr.loadparm, LOADPARM_LEN); 778 return len; 779 } 780 781 /* FCP wrapper */ 782 static ssize_t reipl_fcp_loadparm_show(struct kobject *kobj, 783 struct kobj_attribute *attr, char *page) 784 { 785 return reipl_generic_loadparm_show(reipl_block_fcp, page); 786 } 787 788 static ssize_t reipl_fcp_loadparm_store(struct kobject *kobj, 789 struct kobj_attribute *attr, 790 const char *buf, size_t len) 791 { 792 return reipl_generic_loadparm_store(reipl_block_fcp, buf, len); 793 } 794 795 static struct kobj_attribute sys_reipl_fcp_loadparm_attr = 796 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_fcp_loadparm_show, 797 reipl_fcp_loadparm_store); 798 799 static struct attribute *reipl_fcp_attrs[] = { 800 &sys_reipl_fcp_device_attr.attr, 801 &sys_reipl_fcp_wwpn_attr.attr, 802 &sys_reipl_fcp_lun_attr.attr, 803 &sys_reipl_fcp_bootprog_attr.attr, 804 &sys_reipl_fcp_br_lba_attr.attr, 805 &sys_reipl_fcp_loadparm_attr.attr, 806 NULL, 807 }; 808 809 static struct attribute_group reipl_fcp_attr_group = { 810 .attrs = reipl_fcp_attrs, 811 .bin_attrs = reipl_fcp_bin_attrs, 812 }; 813 814 /* CCW reipl device attributes */ 815 DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ipl_info.ccw); 816 817 /* NSS wrapper */ 818 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj, 819 struct kobj_attribute *attr, char *page) 820 { 821 return reipl_generic_loadparm_show(reipl_block_nss, page); 822 } 823 824 static ssize_t reipl_nss_loadparm_store(struct kobject *kobj, 825 struct kobj_attribute *attr, 826 const char *buf, size_t len) 827 { 828 return reipl_generic_loadparm_store(reipl_block_nss, buf, len); 829 } 830 831 /* CCW wrapper */ 832 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj, 833 struct kobj_attribute *attr, char *page) 834 { 835 return reipl_generic_loadparm_show(reipl_block_ccw, page); 836 } 837 838 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj, 839 struct kobj_attribute *attr, 840 const char *buf, size_t len) 841 { 842 return reipl_generic_loadparm_store(reipl_block_ccw, buf, len); 843 } 844 845 static struct kobj_attribute sys_reipl_ccw_loadparm_attr = 846 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show, 847 reipl_ccw_loadparm_store); 848 849 static struct attribute *reipl_ccw_attrs_vm[] = { 850 &sys_reipl_ccw_device_attr.attr, 851 &sys_reipl_ccw_loadparm_attr.attr, 852 &sys_reipl_ccw_vmparm_attr.attr, 853 NULL, 854 }; 855 856 static struct attribute *reipl_ccw_attrs_lpar[] = { 857 &sys_reipl_ccw_device_attr.attr, 858 &sys_reipl_ccw_loadparm_attr.attr, 859 NULL, 860 }; 861 862 static struct attribute_group reipl_ccw_attr_group_vm = { 863 .name = IPL_CCW_STR, 864 .attrs = reipl_ccw_attrs_vm, 865 }; 866 867 static struct attribute_group reipl_ccw_attr_group_lpar = { 868 .name = IPL_CCW_STR, 869 .attrs = reipl_ccw_attrs_lpar, 870 }; 871 872 873 /* NSS reipl device attributes */ 874 static void reipl_get_ascii_nss_name(char *dst, 875 struct ipl_parameter_block *ipb) 876 { 877 memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE); 878 EBCASC(dst, NSS_NAME_SIZE); 879 dst[NSS_NAME_SIZE] = 0; 880 } 881 882 static ssize_t reipl_nss_name_show(struct kobject *kobj, 883 struct kobj_attribute *attr, char *page) 884 { 885 char nss_name[NSS_NAME_SIZE + 1] = {}; 886 887 reipl_get_ascii_nss_name(nss_name, reipl_block_nss); 888 return sprintf(page, "%s\n", nss_name); 889 } 890 891 static ssize_t reipl_nss_name_store(struct kobject *kobj, 892 struct kobj_attribute *attr, 893 const char *buf, size_t len) 894 { 895 int nss_len; 896 897 /* ignore trailing newline */ 898 nss_len = len; 899 if ((len > 0) && (buf[len - 1] == '\n')) 900 nss_len--; 901 902 if (nss_len > NSS_NAME_SIZE) 903 return -EINVAL; 904 905 memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE); 906 if (nss_len > 0) { 907 reipl_block_nss->ipl_info.ccw.vm_flags |= 908 DIAG308_VM_FLAGS_NSS_VALID; 909 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len); 910 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len); 911 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len); 912 } else { 913 reipl_block_nss->ipl_info.ccw.vm_flags &= 914 ~DIAG308_VM_FLAGS_NSS_VALID; 915 } 916 917 return len; 918 } 919 920 static struct kobj_attribute sys_reipl_nss_name_attr = 921 __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show, 922 reipl_nss_name_store); 923 924 static struct kobj_attribute sys_reipl_nss_loadparm_attr = 925 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show, 926 reipl_nss_loadparm_store); 927 928 static struct attribute *reipl_nss_attrs[] = { 929 &sys_reipl_nss_name_attr.attr, 930 &sys_reipl_nss_loadparm_attr.attr, 931 &sys_reipl_nss_vmparm_attr.attr, 932 NULL, 933 }; 934 935 static struct attribute_group reipl_nss_attr_group = { 936 .name = IPL_NSS_STR, 937 .attrs = reipl_nss_attrs, 938 }; 939 940 static void set_reipl_block_actual(struct ipl_parameter_block *reipl_block) 941 { 942 reipl_block_actual = reipl_block; 943 os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual, 944 reipl_block->hdr.len); 945 } 946 947 /* reipl type */ 948 949 static int reipl_set_type(enum ipl_type type) 950 { 951 if (!(reipl_capabilities & type)) 952 return -EINVAL; 953 954 switch(type) { 955 case IPL_TYPE_CCW: 956 if (diag308_set_works) 957 reipl_method = REIPL_METHOD_CCW_DIAG; 958 else if (MACHINE_IS_VM) 959 reipl_method = REIPL_METHOD_CCW_VM; 960 else 961 reipl_method = REIPL_METHOD_CCW_CIO; 962 set_reipl_block_actual(reipl_block_ccw); 963 break; 964 case IPL_TYPE_FCP: 965 if (diag308_set_works) 966 reipl_method = REIPL_METHOD_FCP_RW_DIAG; 967 else if (MACHINE_IS_VM) 968 reipl_method = REIPL_METHOD_FCP_RO_VM; 969 else 970 reipl_method = REIPL_METHOD_FCP_RO_DIAG; 971 set_reipl_block_actual(reipl_block_fcp); 972 break; 973 case IPL_TYPE_FCP_DUMP: 974 reipl_method = REIPL_METHOD_FCP_DUMP; 975 break; 976 case IPL_TYPE_NSS: 977 if (diag308_set_works) 978 reipl_method = REIPL_METHOD_NSS_DIAG; 979 else 980 reipl_method = REIPL_METHOD_NSS; 981 set_reipl_block_actual(reipl_block_nss); 982 break; 983 case IPL_TYPE_UNKNOWN: 984 reipl_method = REIPL_METHOD_DEFAULT; 985 break; 986 default: 987 BUG(); 988 } 989 reipl_type = type; 990 return 0; 991 } 992 993 static ssize_t reipl_type_show(struct kobject *kobj, 994 struct kobj_attribute *attr, char *page) 995 { 996 return sprintf(page, "%s\n", ipl_type_str(reipl_type)); 997 } 998 999 static ssize_t reipl_type_store(struct kobject *kobj, 1000 struct kobj_attribute *attr, 1001 const char *buf, size_t len) 1002 { 1003 int rc = -EINVAL; 1004 1005 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0) 1006 rc = reipl_set_type(IPL_TYPE_CCW); 1007 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0) 1008 rc = reipl_set_type(IPL_TYPE_FCP); 1009 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0) 1010 rc = reipl_set_type(IPL_TYPE_NSS); 1011 return (rc != 0) ? rc : len; 1012 } 1013 1014 static struct kobj_attribute reipl_type_attr = 1015 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store); 1016 1017 static struct kset *reipl_kset; 1018 static struct kset *reipl_fcp_kset; 1019 1020 static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb, 1021 const enum ipl_method m) 1022 { 1023 char loadparm[LOADPARM_LEN + 1] = {}; 1024 char vmparm[DIAG308_VMPARM_SIZE + 1] = {}; 1025 char nss_name[NSS_NAME_SIZE + 1] = {}; 1026 size_t pos = 0; 1027 1028 reipl_get_ascii_loadparm(loadparm, ipb); 1029 reipl_get_ascii_nss_name(nss_name, ipb); 1030 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb); 1031 1032 switch (m) { 1033 case REIPL_METHOD_CCW_VM: 1034 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno); 1035 break; 1036 case REIPL_METHOD_NSS: 1037 pos = sprintf(dst, "IPL %s", nss_name); 1038 break; 1039 default: 1040 break; 1041 } 1042 if (strlen(loadparm) > 0) 1043 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm); 1044 if (strlen(vmparm) > 0) 1045 sprintf(dst + pos, " PARM %s", vmparm); 1046 } 1047 1048 static void __reipl_run(void *unused) 1049 { 1050 struct ccw_dev_id devid; 1051 static char buf[128]; 1052 1053 switch (reipl_method) { 1054 case REIPL_METHOD_CCW_CIO: 1055 devid.ssid = reipl_block_ccw->ipl_info.ccw.ssid; 1056 devid.devno = reipl_block_ccw->ipl_info.ccw.devno; 1057 reipl_ccw_dev(&devid); 1058 break; 1059 case REIPL_METHOD_CCW_VM: 1060 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM); 1061 __cpcmd(buf, NULL, 0, NULL); 1062 break; 1063 case REIPL_METHOD_CCW_DIAG: 1064 diag308(DIAG308_SET, reipl_block_ccw); 1065 diag308(DIAG308_LOAD_CLEAR, NULL); 1066 break; 1067 case REIPL_METHOD_FCP_RW_DIAG: 1068 diag308(DIAG308_SET, reipl_block_fcp); 1069 diag308(DIAG308_LOAD_CLEAR, NULL); 1070 break; 1071 case REIPL_METHOD_FCP_RO_DIAG: 1072 diag308(DIAG308_LOAD_CLEAR, NULL); 1073 break; 1074 case REIPL_METHOD_FCP_RO_VM: 1075 __cpcmd("IPL", NULL, 0, NULL); 1076 break; 1077 case REIPL_METHOD_NSS_DIAG: 1078 diag308(DIAG308_SET, reipl_block_nss); 1079 diag308(DIAG308_LOAD_CLEAR, NULL); 1080 break; 1081 case REIPL_METHOD_NSS: 1082 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS); 1083 __cpcmd(buf, NULL, 0, NULL); 1084 break; 1085 case REIPL_METHOD_DEFAULT: 1086 if (MACHINE_IS_VM) 1087 __cpcmd("IPL", NULL, 0, NULL); 1088 diag308(DIAG308_LOAD_CLEAR, NULL); 1089 break; 1090 case REIPL_METHOD_FCP_DUMP: 1091 break; 1092 } 1093 disabled_wait((unsigned long) __builtin_return_address(0)); 1094 } 1095 1096 static void reipl_run(struct shutdown_trigger *trigger) 1097 { 1098 smp_call_ipl_cpu(__reipl_run, NULL); 1099 } 1100 1101 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb) 1102 { 1103 ipb->hdr.len = IPL_PARM_BLK_CCW_LEN; 1104 ipb->hdr.version = IPL_PARM_BLOCK_VERSION; 1105 ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN; 1106 ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW; 1107 } 1108 1109 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb) 1110 { 1111 /* LOADPARM */ 1112 /* check if read scp info worked and set loadparm */ 1113 if (sclp_ipl_info.is_valid) 1114 memcpy(ipb->hdr.loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN); 1115 else 1116 /* read scp info failed: set empty loadparm (EBCDIC blanks) */ 1117 memset(ipb->hdr.loadparm, 0x40, LOADPARM_LEN); 1118 ipb->hdr.flags = DIAG308_FLAGS_LP_VALID; 1119 1120 /* VM PARM */ 1121 if (MACHINE_IS_VM && diag308_set_works && 1122 (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) { 1123 1124 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID; 1125 ipb->ipl_info.ccw.vm_parm_len = 1126 ipl_block.ipl_info.ccw.vm_parm_len; 1127 memcpy(ipb->ipl_info.ccw.vm_parm, 1128 ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE); 1129 } 1130 } 1131 1132 static int __init reipl_nss_init(void) 1133 { 1134 int rc; 1135 1136 if (!MACHINE_IS_VM) 1137 return 0; 1138 1139 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL); 1140 if (!reipl_block_nss) 1141 return -ENOMEM; 1142 1143 if (!diag308_set_works) 1144 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO; 1145 1146 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group); 1147 if (rc) 1148 return rc; 1149 1150 reipl_block_ccw_init(reipl_block_nss); 1151 reipl_capabilities |= IPL_TYPE_NSS; 1152 return 0; 1153 } 1154 1155 static int __init reipl_ccw_init(void) 1156 { 1157 int rc; 1158 1159 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL); 1160 if (!reipl_block_ccw) 1161 return -ENOMEM; 1162 1163 if (MACHINE_IS_VM) { 1164 if (!diag308_set_works) 1165 sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO; 1166 rc = sysfs_create_group(&reipl_kset->kobj, 1167 &reipl_ccw_attr_group_vm); 1168 } else { 1169 if(!diag308_set_works) 1170 sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO; 1171 rc = sysfs_create_group(&reipl_kset->kobj, 1172 &reipl_ccw_attr_group_lpar); 1173 } 1174 if (rc) 1175 return rc; 1176 1177 reipl_block_ccw_init(reipl_block_ccw); 1178 if (ipl_info.type == IPL_TYPE_CCW) { 1179 reipl_block_ccw->ipl_info.ccw.ssid = ipl_ssid; 1180 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno; 1181 reipl_block_ccw_fill_parms(reipl_block_ccw); 1182 } 1183 1184 reipl_capabilities |= IPL_TYPE_CCW; 1185 return 0; 1186 } 1187 1188 static int __init reipl_fcp_init(void) 1189 { 1190 int rc; 1191 1192 if (!diag308_set_works) { 1193 if (ipl_info.type == IPL_TYPE_FCP) { 1194 make_attrs_ro(reipl_fcp_attrs); 1195 sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO; 1196 } else 1197 return 0; 1198 } 1199 1200 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL); 1201 if (!reipl_block_fcp) 1202 return -ENOMEM; 1203 1204 /* sysfs: create fcp kset for mixing attr group and bin attrs */ 1205 reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL, 1206 &reipl_kset->kobj); 1207 if (!reipl_fcp_kset) { 1208 free_page((unsigned long) reipl_block_fcp); 1209 return -ENOMEM; 1210 } 1211 1212 rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group); 1213 if (rc) { 1214 kset_unregister(reipl_fcp_kset); 1215 free_page((unsigned long) reipl_block_fcp); 1216 return rc; 1217 } 1218 1219 if (ipl_info.type == IPL_TYPE_FCP) { 1220 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE); 1221 /* 1222 * Fix loadparm: There are systems where the (SCSI) LOADPARM 1223 * is invalid in the SCSI IPL parameter block, so take it 1224 * always from sclp_ipl_info. 1225 */ 1226 memcpy(reipl_block_fcp->hdr.loadparm, sclp_ipl_info.loadparm, 1227 LOADPARM_LEN); 1228 } else { 1229 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN; 1230 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION; 1231 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN; 1232 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP; 1233 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL; 1234 } 1235 reipl_capabilities |= IPL_TYPE_FCP; 1236 return 0; 1237 } 1238 1239 static int __init reipl_type_init(void) 1240 { 1241 enum ipl_type reipl_type = ipl_info.type; 1242 struct ipl_parameter_block *reipl_block; 1243 unsigned long size; 1244 1245 reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size); 1246 if (!reipl_block) 1247 goto out; 1248 /* 1249 * If we have an OS info reipl block, this will be used 1250 */ 1251 if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_FCP) { 1252 memcpy(reipl_block_fcp, reipl_block, size); 1253 reipl_type = IPL_TYPE_FCP; 1254 } else if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_CCW) { 1255 memcpy(reipl_block_ccw, reipl_block, size); 1256 reipl_type = IPL_TYPE_CCW; 1257 } 1258 out: 1259 return reipl_set_type(reipl_type); 1260 } 1261 1262 static int __init reipl_init(void) 1263 { 1264 int rc; 1265 1266 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj); 1267 if (!reipl_kset) 1268 return -ENOMEM; 1269 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr); 1270 if (rc) { 1271 kset_unregister(reipl_kset); 1272 return rc; 1273 } 1274 rc = reipl_ccw_init(); 1275 if (rc) 1276 return rc; 1277 rc = reipl_fcp_init(); 1278 if (rc) 1279 return rc; 1280 rc = reipl_nss_init(); 1281 if (rc) 1282 return rc; 1283 return reipl_type_init(); 1284 } 1285 1286 static struct shutdown_action __refdata reipl_action = { 1287 .name = SHUTDOWN_ACTION_REIPL_STR, 1288 .fn = reipl_run, 1289 .init = reipl_init, 1290 }; 1291 1292 /* 1293 * dump shutdown action: Dump Linux on shutdown. 1294 */ 1295 1296 /* FCP dump device attributes */ 1297 1298 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n", 1299 dump_block_fcp->ipl_info.fcp.wwpn); 1300 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n", 1301 dump_block_fcp->ipl_info.fcp.lun); 1302 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n", 1303 dump_block_fcp->ipl_info.fcp.bootprog); 1304 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n", 1305 dump_block_fcp->ipl_info.fcp.br_lba); 1306 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n", 1307 dump_block_fcp->ipl_info.fcp.devno); 1308 1309 static struct attribute *dump_fcp_attrs[] = { 1310 &sys_dump_fcp_device_attr.attr, 1311 &sys_dump_fcp_wwpn_attr.attr, 1312 &sys_dump_fcp_lun_attr.attr, 1313 &sys_dump_fcp_bootprog_attr.attr, 1314 &sys_dump_fcp_br_lba_attr.attr, 1315 NULL, 1316 }; 1317 1318 static struct attribute_group dump_fcp_attr_group = { 1319 .name = IPL_FCP_STR, 1320 .attrs = dump_fcp_attrs, 1321 }; 1322 1323 /* CCW dump device attributes */ 1324 DEFINE_IPL_CCW_ATTR_RW(dump_ccw, device, dump_block_ccw->ipl_info.ccw); 1325 1326 static struct attribute *dump_ccw_attrs[] = { 1327 &sys_dump_ccw_device_attr.attr, 1328 NULL, 1329 }; 1330 1331 static struct attribute_group dump_ccw_attr_group = { 1332 .name = IPL_CCW_STR, 1333 .attrs = dump_ccw_attrs, 1334 }; 1335 1336 /* dump type */ 1337 1338 static int dump_set_type(enum dump_type type) 1339 { 1340 if (!(dump_capabilities & type)) 1341 return -EINVAL; 1342 switch (type) { 1343 case DUMP_TYPE_CCW: 1344 if (diag308_set_works) 1345 dump_method = DUMP_METHOD_CCW_DIAG; 1346 else if (MACHINE_IS_VM) 1347 dump_method = DUMP_METHOD_CCW_VM; 1348 else 1349 dump_method = DUMP_METHOD_CCW_CIO; 1350 break; 1351 case DUMP_TYPE_FCP: 1352 dump_method = DUMP_METHOD_FCP_DIAG; 1353 break; 1354 default: 1355 dump_method = DUMP_METHOD_NONE; 1356 } 1357 dump_type = type; 1358 return 0; 1359 } 1360 1361 static ssize_t dump_type_show(struct kobject *kobj, 1362 struct kobj_attribute *attr, char *page) 1363 { 1364 return sprintf(page, "%s\n", dump_type_str(dump_type)); 1365 } 1366 1367 static ssize_t dump_type_store(struct kobject *kobj, 1368 struct kobj_attribute *attr, 1369 const char *buf, size_t len) 1370 { 1371 int rc = -EINVAL; 1372 1373 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0) 1374 rc = dump_set_type(DUMP_TYPE_NONE); 1375 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0) 1376 rc = dump_set_type(DUMP_TYPE_CCW); 1377 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0) 1378 rc = dump_set_type(DUMP_TYPE_FCP); 1379 return (rc != 0) ? rc : len; 1380 } 1381 1382 static struct kobj_attribute dump_type_attr = 1383 __ATTR(dump_type, 0644, dump_type_show, dump_type_store); 1384 1385 static struct kset *dump_kset; 1386 1387 static void diag308_dump(void *dump_block) 1388 { 1389 diag308(DIAG308_SET, dump_block); 1390 while (1) { 1391 if (diag308(DIAG308_LOAD_NORMAL_DUMP, NULL) != 0x302) 1392 break; 1393 udelay_simple(USEC_PER_SEC); 1394 } 1395 } 1396 1397 static void __dump_run(void *unused) 1398 { 1399 struct ccw_dev_id devid; 1400 static char buf[100]; 1401 1402 switch (dump_method) { 1403 case DUMP_METHOD_CCW_CIO: 1404 devid.ssid = dump_block_ccw->ipl_info.ccw.ssid; 1405 devid.devno = dump_block_ccw->ipl_info.ccw.devno; 1406 reipl_ccw_dev(&devid); 1407 break; 1408 case DUMP_METHOD_CCW_VM: 1409 sprintf(buf, "STORE STATUS"); 1410 __cpcmd(buf, NULL, 0, NULL); 1411 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno); 1412 __cpcmd(buf, NULL, 0, NULL); 1413 break; 1414 case DUMP_METHOD_CCW_DIAG: 1415 diag308_dump(dump_block_ccw); 1416 break; 1417 case DUMP_METHOD_FCP_DIAG: 1418 diag308_dump(dump_block_fcp); 1419 break; 1420 default: 1421 break; 1422 } 1423 } 1424 1425 static void dump_run(struct shutdown_trigger *trigger) 1426 { 1427 if (dump_method == DUMP_METHOD_NONE) 1428 return; 1429 smp_send_stop(); 1430 smp_call_ipl_cpu(__dump_run, NULL); 1431 } 1432 1433 static int __init dump_ccw_init(void) 1434 { 1435 int rc; 1436 1437 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL); 1438 if (!dump_block_ccw) 1439 return -ENOMEM; 1440 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group); 1441 if (rc) { 1442 free_page((unsigned long)dump_block_ccw); 1443 return rc; 1444 } 1445 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN; 1446 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION; 1447 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN; 1448 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW; 1449 dump_capabilities |= DUMP_TYPE_CCW; 1450 return 0; 1451 } 1452 1453 static int __init dump_fcp_init(void) 1454 { 1455 int rc; 1456 1457 if (!sclp_ipl_info.has_dump) 1458 return 0; /* LDIPL DUMP is not installed */ 1459 if (!diag308_set_works) 1460 return 0; 1461 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL); 1462 if (!dump_block_fcp) 1463 return -ENOMEM; 1464 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group); 1465 if (rc) { 1466 free_page((unsigned long)dump_block_fcp); 1467 return rc; 1468 } 1469 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN; 1470 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION; 1471 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN; 1472 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP; 1473 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP; 1474 dump_capabilities |= DUMP_TYPE_FCP; 1475 return 0; 1476 } 1477 1478 static int __init dump_init(void) 1479 { 1480 int rc; 1481 1482 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj); 1483 if (!dump_kset) 1484 return -ENOMEM; 1485 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr); 1486 if (rc) { 1487 kset_unregister(dump_kset); 1488 return rc; 1489 } 1490 rc = dump_ccw_init(); 1491 if (rc) 1492 return rc; 1493 rc = dump_fcp_init(); 1494 if (rc) 1495 return rc; 1496 dump_set_type(DUMP_TYPE_NONE); 1497 return 0; 1498 } 1499 1500 static struct shutdown_action __refdata dump_action = { 1501 .name = SHUTDOWN_ACTION_DUMP_STR, 1502 .fn = dump_run, 1503 .init = dump_init, 1504 }; 1505 1506 static void dump_reipl_run(struct shutdown_trigger *trigger) 1507 { 1508 unsigned long ipib = (unsigned long) reipl_block_actual; 1509 unsigned int csum; 1510 1511 csum = (__force unsigned int) 1512 csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0); 1513 mem_assign_absolute(S390_lowcore.ipib, ipib); 1514 mem_assign_absolute(S390_lowcore.ipib_checksum, csum); 1515 dump_run(trigger); 1516 } 1517 1518 static int __init dump_reipl_init(void) 1519 { 1520 if (!diag308_set_works) 1521 return -EOPNOTSUPP; 1522 else 1523 return 0; 1524 } 1525 1526 static struct shutdown_action __refdata dump_reipl_action = { 1527 .name = SHUTDOWN_ACTION_DUMP_REIPL_STR, 1528 .fn = dump_reipl_run, 1529 .init = dump_reipl_init, 1530 }; 1531 1532 /* 1533 * vmcmd shutdown action: Trigger vm command on shutdown. 1534 */ 1535 1536 static char vmcmd_on_reboot[128]; 1537 static char vmcmd_on_panic[128]; 1538 static char vmcmd_on_halt[128]; 1539 static char vmcmd_on_poff[128]; 1540 static char vmcmd_on_restart[128]; 1541 1542 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot); 1543 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic); 1544 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt); 1545 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff); 1546 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart); 1547 1548 static struct attribute *vmcmd_attrs[] = { 1549 &sys_vmcmd_on_reboot_attr.attr, 1550 &sys_vmcmd_on_panic_attr.attr, 1551 &sys_vmcmd_on_halt_attr.attr, 1552 &sys_vmcmd_on_poff_attr.attr, 1553 &sys_vmcmd_on_restart_attr.attr, 1554 NULL, 1555 }; 1556 1557 static struct attribute_group vmcmd_attr_group = { 1558 .attrs = vmcmd_attrs, 1559 }; 1560 1561 static struct kset *vmcmd_kset; 1562 1563 static void vmcmd_run(struct shutdown_trigger *trigger) 1564 { 1565 char *cmd; 1566 1567 if (strcmp(trigger->name, ON_REIPL_STR) == 0) 1568 cmd = vmcmd_on_reboot; 1569 else if (strcmp(trigger->name, ON_PANIC_STR) == 0) 1570 cmd = vmcmd_on_panic; 1571 else if (strcmp(trigger->name, ON_HALT_STR) == 0) 1572 cmd = vmcmd_on_halt; 1573 else if (strcmp(trigger->name, ON_POFF_STR) == 0) 1574 cmd = vmcmd_on_poff; 1575 else if (strcmp(trigger->name, ON_RESTART_STR) == 0) 1576 cmd = vmcmd_on_restart; 1577 else 1578 return; 1579 1580 if (strlen(cmd) == 0) 1581 return; 1582 __cpcmd(cmd, NULL, 0, NULL); 1583 } 1584 1585 static int vmcmd_init(void) 1586 { 1587 if (!MACHINE_IS_VM) 1588 return -EOPNOTSUPP; 1589 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj); 1590 if (!vmcmd_kset) 1591 return -ENOMEM; 1592 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group); 1593 } 1594 1595 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR, 1596 vmcmd_run, vmcmd_init}; 1597 1598 /* 1599 * stop shutdown action: Stop Linux on shutdown. 1600 */ 1601 1602 static void stop_run(struct shutdown_trigger *trigger) 1603 { 1604 if (strcmp(trigger->name, ON_PANIC_STR) == 0 || 1605 strcmp(trigger->name, ON_RESTART_STR) == 0) 1606 disabled_wait((unsigned long) __builtin_return_address(0)); 1607 smp_stop_cpu(); 1608 } 1609 1610 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR, 1611 stop_run, NULL}; 1612 1613 /* action list */ 1614 1615 static struct shutdown_action *shutdown_actions_list[] = { 1616 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action, 1617 &vmcmd_action, &stop_action}; 1618 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *)) 1619 1620 /* 1621 * Trigger section 1622 */ 1623 1624 static struct kset *shutdown_actions_kset; 1625 1626 static int set_trigger(const char *buf, struct shutdown_trigger *trigger, 1627 size_t len) 1628 { 1629 int i; 1630 1631 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) { 1632 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) { 1633 if (shutdown_actions_list[i]->init_rc) { 1634 return shutdown_actions_list[i]->init_rc; 1635 } else { 1636 trigger->action = shutdown_actions_list[i]; 1637 return len; 1638 } 1639 } 1640 } 1641 return -EINVAL; 1642 } 1643 1644 /* on reipl */ 1645 1646 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR, 1647 &reipl_action}; 1648 1649 static ssize_t on_reboot_show(struct kobject *kobj, 1650 struct kobj_attribute *attr, char *page) 1651 { 1652 return sprintf(page, "%s\n", on_reboot_trigger.action->name); 1653 } 1654 1655 static ssize_t on_reboot_store(struct kobject *kobj, 1656 struct kobj_attribute *attr, 1657 const char *buf, size_t len) 1658 { 1659 return set_trigger(buf, &on_reboot_trigger, len); 1660 } 1661 static struct kobj_attribute on_reboot_attr = __ATTR_RW(on_reboot); 1662 1663 static void do_machine_restart(char *__unused) 1664 { 1665 smp_send_stop(); 1666 on_reboot_trigger.action->fn(&on_reboot_trigger); 1667 reipl_run(NULL); 1668 } 1669 void (*_machine_restart)(char *command) = do_machine_restart; 1670 1671 /* on panic */ 1672 1673 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action}; 1674 1675 static ssize_t on_panic_show(struct kobject *kobj, 1676 struct kobj_attribute *attr, char *page) 1677 { 1678 return sprintf(page, "%s\n", on_panic_trigger.action->name); 1679 } 1680 1681 static ssize_t on_panic_store(struct kobject *kobj, 1682 struct kobj_attribute *attr, 1683 const char *buf, size_t len) 1684 { 1685 return set_trigger(buf, &on_panic_trigger, len); 1686 } 1687 static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic); 1688 1689 static void do_panic(void) 1690 { 1691 lgr_info_log(); 1692 on_panic_trigger.action->fn(&on_panic_trigger); 1693 stop_run(&on_panic_trigger); 1694 } 1695 1696 /* on restart */ 1697 1698 static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR, 1699 &stop_action}; 1700 1701 static ssize_t on_restart_show(struct kobject *kobj, 1702 struct kobj_attribute *attr, char *page) 1703 { 1704 return sprintf(page, "%s\n", on_restart_trigger.action->name); 1705 } 1706 1707 static ssize_t on_restart_store(struct kobject *kobj, 1708 struct kobj_attribute *attr, 1709 const char *buf, size_t len) 1710 { 1711 return set_trigger(buf, &on_restart_trigger, len); 1712 } 1713 static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart); 1714 1715 static void __do_restart(void *ignore) 1716 { 1717 __arch_local_irq_stosm(0x04); /* enable DAT */ 1718 smp_send_stop(); 1719 #ifdef CONFIG_CRASH_DUMP 1720 crash_kexec(NULL); 1721 #endif 1722 on_restart_trigger.action->fn(&on_restart_trigger); 1723 stop_run(&on_restart_trigger); 1724 } 1725 1726 void do_restart(void) 1727 { 1728 tracing_off(); 1729 debug_locks_off(); 1730 lgr_info_log(); 1731 smp_call_online_cpu(__do_restart, NULL); 1732 } 1733 1734 /* on halt */ 1735 1736 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action}; 1737 1738 static ssize_t on_halt_show(struct kobject *kobj, 1739 struct kobj_attribute *attr, char *page) 1740 { 1741 return sprintf(page, "%s\n", on_halt_trigger.action->name); 1742 } 1743 1744 static ssize_t on_halt_store(struct kobject *kobj, 1745 struct kobj_attribute *attr, 1746 const char *buf, size_t len) 1747 { 1748 return set_trigger(buf, &on_halt_trigger, len); 1749 } 1750 static struct kobj_attribute on_halt_attr = __ATTR_RW(on_halt); 1751 1752 static void do_machine_halt(void) 1753 { 1754 smp_send_stop(); 1755 on_halt_trigger.action->fn(&on_halt_trigger); 1756 stop_run(&on_halt_trigger); 1757 } 1758 void (*_machine_halt)(void) = do_machine_halt; 1759 1760 /* on power off */ 1761 1762 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action}; 1763 1764 static ssize_t on_poff_show(struct kobject *kobj, 1765 struct kobj_attribute *attr, char *page) 1766 { 1767 return sprintf(page, "%s\n", on_poff_trigger.action->name); 1768 } 1769 1770 static ssize_t on_poff_store(struct kobject *kobj, 1771 struct kobj_attribute *attr, 1772 const char *buf, size_t len) 1773 { 1774 return set_trigger(buf, &on_poff_trigger, len); 1775 } 1776 static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff); 1777 1778 static void do_machine_power_off(void) 1779 { 1780 smp_send_stop(); 1781 on_poff_trigger.action->fn(&on_poff_trigger); 1782 stop_run(&on_poff_trigger); 1783 } 1784 void (*_machine_power_off)(void) = do_machine_power_off; 1785 1786 static struct attribute *shutdown_action_attrs[] = { 1787 &on_restart_attr.attr, 1788 &on_reboot_attr.attr, 1789 &on_panic_attr.attr, 1790 &on_halt_attr.attr, 1791 &on_poff_attr.attr, 1792 NULL, 1793 }; 1794 1795 static struct attribute_group shutdown_action_attr_group = { 1796 .attrs = shutdown_action_attrs, 1797 }; 1798 1799 static void __init shutdown_triggers_init(void) 1800 { 1801 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL, 1802 firmware_kobj); 1803 if (!shutdown_actions_kset) 1804 goto fail; 1805 if (sysfs_create_group(&shutdown_actions_kset->kobj, 1806 &shutdown_action_attr_group)) 1807 goto fail; 1808 return; 1809 fail: 1810 panic("shutdown_triggers_init failed\n"); 1811 } 1812 1813 static void __init shutdown_actions_init(void) 1814 { 1815 int i; 1816 1817 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) { 1818 if (!shutdown_actions_list[i]->init) 1819 continue; 1820 shutdown_actions_list[i]->init_rc = 1821 shutdown_actions_list[i]->init(); 1822 } 1823 } 1824 1825 static int __init s390_ipl_init(void) 1826 { 1827 char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40}; 1828 1829 sclp_early_get_ipl_info(&sclp_ipl_info); 1830 /* 1831 * Fix loadparm: There are systems where the (SCSI) LOADPARM 1832 * returned by read SCP info is invalid (contains EBCDIC blanks) 1833 * when the system has been booted via diag308. In that case we use 1834 * the value from diag308, if available. 1835 * 1836 * There are also systems where diag308 store does not work in 1837 * case the system is booted from HMC. Fortunately in this case 1838 * READ SCP info provides the correct value. 1839 */ 1840 if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 && 1841 diag308_set_works) 1842 memcpy(sclp_ipl_info.loadparm, ipl_block.hdr.loadparm, 1843 LOADPARM_LEN); 1844 shutdown_actions_init(); 1845 shutdown_triggers_init(); 1846 return 0; 1847 } 1848 1849 __initcall(s390_ipl_init); 1850 1851 static void __init strncpy_skip_quote(char *dst, char *src, int n) 1852 { 1853 int sx, dx; 1854 1855 dx = 0; 1856 for (sx = 0; src[sx] != 0; sx++) { 1857 if (src[sx] == '"') 1858 continue; 1859 dst[dx++] = src[sx]; 1860 if (dx >= n) 1861 break; 1862 } 1863 } 1864 1865 static int __init vmcmd_on_reboot_setup(char *str) 1866 { 1867 if (!MACHINE_IS_VM) 1868 return 1; 1869 strncpy_skip_quote(vmcmd_on_reboot, str, 127); 1870 vmcmd_on_reboot[127] = 0; 1871 on_reboot_trigger.action = &vmcmd_action; 1872 return 1; 1873 } 1874 __setup("vmreboot=", vmcmd_on_reboot_setup); 1875 1876 static int __init vmcmd_on_panic_setup(char *str) 1877 { 1878 if (!MACHINE_IS_VM) 1879 return 1; 1880 strncpy_skip_quote(vmcmd_on_panic, str, 127); 1881 vmcmd_on_panic[127] = 0; 1882 on_panic_trigger.action = &vmcmd_action; 1883 return 1; 1884 } 1885 __setup("vmpanic=", vmcmd_on_panic_setup); 1886 1887 static int __init vmcmd_on_halt_setup(char *str) 1888 { 1889 if (!MACHINE_IS_VM) 1890 return 1; 1891 strncpy_skip_quote(vmcmd_on_halt, str, 127); 1892 vmcmd_on_halt[127] = 0; 1893 on_halt_trigger.action = &vmcmd_action; 1894 return 1; 1895 } 1896 __setup("vmhalt=", vmcmd_on_halt_setup); 1897 1898 static int __init vmcmd_on_poff_setup(char *str) 1899 { 1900 if (!MACHINE_IS_VM) 1901 return 1; 1902 strncpy_skip_quote(vmcmd_on_poff, str, 127); 1903 vmcmd_on_poff[127] = 0; 1904 on_poff_trigger.action = &vmcmd_action; 1905 return 1; 1906 } 1907 __setup("vmpoff=", vmcmd_on_poff_setup); 1908 1909 static int on_panic_notify(struct notifier_block *self, 1910 unsigned long event, void *data) 1911 { 1912 do_panic(); 1913 return NOTIFY_OK; 1914 } 1915 1916 static struct notifier_block on_panic_nb = { 1917 .notifier_call = on_panic_notify, 1918 .priority = INT_MIN, 1919 }; 1920 1921 void __init setup_ipl(void) 1922 { 1923 ipl_info.type = get_ipl_type(); 1924 switch (ipl_info.type) { 1925 case IPL_TYPE_CCW: 1926 ipl_info.data.ccw.dev_id.ssid = ipl_ssid; 1927 ipl_info.data.ccw.dev_id.devno = ipl_devno; 1928 break; 1929 case IPL_TYPE_FCP: 1930 case IPL_TYPE_FCP_DUMP: 1931 ipl_info.data.fcp.dev_id.ssid = 0; 1932 ipl_info.data.fcp.dev_id.devno = 1933 IPL_PARMBLOCK_START->ipl_info.fcp.devno; 1934 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn; 1935 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun; 1936 break; 1937 case IPL_TYPE_NSS: 1938 case IPL_TYPE_UNKNOWN: 1939 /* We have no info to copy */ 1940 break; 1941 } 1942 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb); 1943 } 1944 1945 void __init ipl_update_parameters(void) 1946 { 1947 int rc; 1948 1949 rc = diag308(DIAG308_STORE, &ipl_block); 1950 if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG)) 1951 diag308_set_works = 1; 1952 } 1953 1954 void __init ipl_verify_parameters(void) 1955 { 1956 struct cio_iplinfo iplinfo; 1957 1958 if (cio_get_iplinfo(&iplinfo)) 1959 return; 1960 1961 ipl_ssid = iplinfo.ssid; 1962 ipl_devno = iplinfo.devno; 1963 ipl_flags |= IPL_DEVNO_VALID; 1964 if (!iplinfo.is_qdio) 1965 return; 1966 ipl_flags |= IPL_PARMBLOCK_VALID; 1967 } 1968 1969 static LIST_HEAD(rcall); 1970 static DEFINE_MUTEX(rcall_mutex); 1971 1972 void register_reset_call(struct reset_call *reset) 1973 { 1974 mutex_lock(&rcall_mutex); 1975 list_add(&reset->list, &rcall); 1976 mutex_unlock(&rcall_mutex); 1977 } 1978 EXPORT_SYMBOL_GPL(register_reset_call); 1979 1980 void unregister_reset_call(struct reset_call *reset) 1981 { 1982 mutex_lock(&rcall_mutex); 1983 list_del(&reset->list); 1984 mutex_unlock(&rcall_mutex); 1985 } 1986 EXPORT_SYMBOL_GPL(unregister_reset_call); 1987 1988 static void do_reset_calls(void) 1989 { 1990 struct reset_call *reset; 1991 1992 if (diag308_set_works) { 1993 diag308_reset(); 1994 return; 1995 } 1996 list_for_each_entry(reset, &rcall, list) 1997 reset->fn(); 1998 } 1999 2000 void s390_reset_system(void) 2001 { 2002 struct lowcore *lc; 2003 2004 lc = (struct lowcore *)(unsigned long) store_prefix(); 2005 2006 /* Stack for interrupt/machine check handler */ 2007 lc->panic_stack = S390_lowcore.panic_stack; 2008 2009 /* Disable prefixing */ 2010 set_prefix(0); 2011 2012 /* Disable lowcore protection */ 2013 __ctl_clear_bit(0,28); 2014 2015 /* Set new machine check handler */ 2016 S390_lowcore.mcck_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT; 2017 S390_lowcore.mcck_new_psw.addr = 2018 (unsigned long) s390_base_mcck_handler; 2019 2020 /* Set new program check handler */ 2021 S390_lowcore.program_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT; 2022 S390_lowcore.program_new_psw.addr = 2023 (unsigned long) s390_base_pgm_handler; 2024 2025 do_reset_calls(); 2026 } 2027