1 /* 2 * arch/s390/kernel/ipl.c 3 * ipl/reipl/dump support for Linux on s390. 4 * 5 * Copyright IBM Corp. 2005,2007 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/module.h> 13 #include <linux/device.h> 14 #include <linux/delay.h> 15 #include <linux/reboot.h> 16 #include <linux/ctype.h> 17 #include <linux/fs.h> 18 #include <asm/ipl.h> 19 #include <asm/smp.h> 20 #include <asm/setup.h> 21 #include <asm/cpcmd.h> 22 #include <asm/cio.h> 23 #include <asm/ebcdic.h> 24 #include <asm/reset.h> 25 #include <asm/sclp.h> 26 #include <asm/setup.h> 27 28 #define IPL_PARM_BLOCK_VERSION 0 29 30 #define IPL_UNKNOWN_STR "unknown" 31 #define IPL_CCW_STR "ccw" 32 #define IPL_FCP_STR "fcp" 33 #define IPL_FCP_DUMP_STR "fcp_dump" 34 #define IPL_NSS_STR "nss" 35 36 #define DUMP_CCW_STR "ccw" 37 #define DUMP_FCP_STR "fcp" 38 #define DUMP_NONE_STR "none" 39 40 /* 41 * Four shutdown trigger types are supported: 42 * - panic 43 * - halt 44 * - power off 45 * - reipl 46 */ 47 #define ON_PANIC_STR "on_panic" 48 #define ON_HALT_STR "on_halt" 49 #define ON_POFF_STR "on_poff" 50 #define ON_REIPL_STR "on_reboot" 51 52 struct shutdown_action; 53 struct shutdown_trigger { 54 char *name; 55 struct shutdown_action *action; 56 }; 57 58 /* 59 * Five shutdown action types are supported: 60 */ 61 #define SHUTDOWN_ACTION_IPL_STR "ipl" 62 #define SHUTDOWN_ACTION_REIPL_STR "reipl" 63 #define SHUTDOWN_ACTION_DUMP_STR "dump" 64 #define SHUTDOWN_ACTION_VMCMD_STR "vmcmd" 65 #define SHUTDOWN_ACTION_STOP_STR "stop" 66 67 struct shutdown_action { 68 char *name; 69 void (*fn) (struct shutdown_trigger *trigger); 70 int (*init) (void); 71 }; 72 73 static char *ipl_type_str(enum ipl_type type) 74 { 75 switch (type) { 76 case IPL_TYPE_CCW: 77 return IPL_CCW_STR; 78 case IPL_TYPE_FCP: 79 return IPL_FCP_STR; 80 case IPL_TYPE_FCP_DUMP: 81 return IPL_FCP_DUMP_STR; 82 case IPL_TYPE_NSS: 83 return IPL_NSS_STR; 84 case IPL_TYPE_UNKNOWN: 85 default: 86 return IPL_UNKNOWN_STR; 87 } 88 } 89 90 enum dump_type { 91 DUMP_TYPE_NONE = 1, 92 DUMP_TYPE_CCW = 2, 93 DUMP_TYPE_FCP = 4, 94 }; 95 96 static char *dump_type_str(enum dump_type type) 97 { 98 switch (type) { 99 case DUMP_TYPE_NONE: 100 return DUMP_NONE_STR; 101 case DUMP_TYPE_CCW: 102 return DUMP_CCW_STR; 103 case DUMP_TYPE_FCP: 104 return DUMP_FCP_STR; 105 default: 106 return NULL; 107 } 108 } 109 110 /* 111 * Must be in data section since the bss section 112 * is not cleared when these are accessed. 113 */ 114 static u16 ipl_devno __attribute__((__section__(".data"))) = 0; 115 u32 ipl_flags __attribute__((__section__(".data"))) = 0; 116 117 enum ipl_method { 118 REIPL_METHOD_CCW_CIO, 119 REIPL_METHOD_CCW_DIAG, 120 REIPL_METHOD_CCW_VM, 121 REIPL_METHOD_FCP_RO_DIAG, 122 REIPL_METHOD_FCP_RW_DIAG, 123 REIPL_METHOD_FCP_RO_VM, 124 REIPL_METHOD_FCP_DUMP, 125 REIPL_METHOD_NSS, 126 REIPL_METHOD_NSS_DIAG, 127 REIPL_METHOD_DEFAULT, 128 }; 129 130 enum dump_method { 131 DUMP_METHOD_NONE, 132 DUMP_METHOD_CCW_CIO, 133 DUMP_METHOD_CCW_DIAG, 134 DUMP_METHOD_CCW_VM, 135 DUMP_METHOD_FCP_DIAG, 136 }; 137 138 static int diag308_set_works = 0; 139 140 static struct ipl_parameter_block ipl_block; 141 142 static int reipl_capabilities = IPL_TYPE_UNKNOWN; 143 144 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN; 145 static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT; 146 static struct ipl_parameter_block *reipl_block_fcp; 147 static struct ipl_parameter_block *reipl_block_ccw; 148 static struct ipl_parameter_block *reipl_block_nss; 149 150 static int dump_capabilities = DUMP_TYPE_NONE; 151 static enum dump_type dump_type = DUMP_TYPE_NONE; 152 static enum dump_method dump_method = DUMP_METHOD_NONE; 153 static struct ipl_parameter_block *dump_block_fcp; 154 static struct ipl_parameter_block *dump_block_ccw; 155 156 static struct sclp_ipl_info sclp_ipl_info; 157 158 int diag308(unsigned long subcode, void *addr) 159 { 160 register unsigned long _addr asm("0") = (unsigned long) addr; 161 register unsigned long _rc asm("1") = 0; 162 163 asm volatile( 164 " diag %0,%2,0x308\n" 165 "0:\n" 166 EX_TABLE(0b,0b) 167 : "+d" (_addr), "+d" (_rc) 168 : "d" (subcode) : "cc", "memory"); 169 return _rc; 170 } 171 EXPORT_SYMBOL_GPL(diag308); 172 173 /* SYSFS */ 174 175 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \ 176 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \ 177 struct kobj_attribute *attr, \ 178 char *page) \ 179 { \ 180 return sprintf(page, _format, _value); \ 181 } \ 182 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ 183 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL); 184 185 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \ 186 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \ 187 struct kobj_attribute *attr, \ 188 char *page) \ 189 { \ 190 return sprintf(page, _fmt_out, \ 191 (unsigned long long) _value); \ 192 } \ 193 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \ 194 struct kobj_attribute *attr, \ 195 const char *buf, size_t len) \ 196 { \ 197 unsigned long long value; \ 198 if (sscanf(buf, _fmt_in, &value) != 1) \ 199 return -EINVAL; \ 200 _value = value; \ 201 return len; \ 202 } \ 203 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ 204 __ATTR(_name,(S_IRUGO | S_IWUSR), \ 205 sys_##_prefix##_##_name##_show, \ 206 sys_##_prefix##_##_name##_store); 207 208 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\ 209 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \ 210 struct kobj_attribute *attr, \ 211 char *page) \ 212 { \ 213 return sprintf(page, _fmt_out, _value); \ 214 } \ 215 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \ 216 struct kobj_attribute *attr, \ 217 const char *buf, size_t len) \ 218 { \ 219 strncpy(_value, buf, sizeof(_value) - 1); \ 220 strstrip(_value); \ 221 return len; \ 222 } \ 223 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ 224 __ATTR(_name,(S_IRUGO | S_IWUSR), \ 225 sys_##_prefix##_##_name##_show, \ 226 sys_##_prefix##_##_name##_store); 227 228 static void make_attrs_ro(struct attribute **attrs) 229 { 230 while (*attrs) { 231 (*attrs)->mode = S_IRUGO; 232 attrs++; 233 } 234 } 235 236 /* 237 * ipl section 238 */ 239 240 static __init enum ipl_type get_ipl_type(void) 241 { 242 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START; 243 244 if (ipl_flags & IPL_NSS_VALID) 245 return IPL_TYPE_NSS; 246 if (!(ipl_flags & IPL_DEVNO_VALID)) 247 return IPL_TYPE_UNKNOWN; 248 if (!(ipl_flags & IPL_PARMBLOCK_VALID)) 249 return IPL_TYPE_CCW; 250 if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION) 251 return IPL_TYPE_UNKNOWN; 252 if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP) 253 return IPL_TYPE_UNKNOWN; 254 if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP) 255 return IPL_TYPE_FCP_DUMP; 256 return IPL_TYPE_FCP; 257 } 258 259 struct ipl_info ipl_info; 260 EXPORT_SYMBOL_GPL(ipl_info); 261 262 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr, 263 char *page) 264 { 265 return sprintf(page, "%s\n", ipl_type_str(ipl_info.type)); 266 } 267 268 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type); 269 270 /* VM IPL PARM routines */ 271 static void reipl_get_ascii_vmparm(char *dest, 272 const struct ipl_parameter_block *ipb) 273 { 274 int i; 275 int len = 0; 276 char has_lowercase = 0; 277 278 if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) && 279 (ipb->ipl_info.ccw.vm_parm_len > 0)) { 280 281 len = ipb->ipl_info.ccw.vm_parm_len; 282 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len); 283 /* If at least one character is lowercase, we assume mixed 284 * case; otherwise we convert everything to lowercase. 285 */ 286 for (i = 0; i < len; i++) 287 if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */ 288 (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */ 289 (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */ 290 has_lowercase = 1; 291 break; 292 } 293 if (!has_lowercase) 294 EBC_TOLOWER(dest, len); 295 EBCASC(dest, len); 296 } 297 dest[len] = 0; 298 } 299 300 void get_ipl_vmparm(char *dest) 301 { 302 if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW)) 303 reipl_get_ascii_vmparm(dest, &ipl_block); 304 else 305 dest[0] = 0; 306 } 307 308 static ssize_t ipl_vm_parm_show(struct kobject *kobj, 309 struct kobj_attribute *attr, char *page) 310 { 311 char parm[DIAG308_VMPARM_SIZE + 1] = {}; 312 313 get_ipl_vmparm(parm); 314 return sprintf(page, "%s\n", parm); 315 } 316 317 static struct kobj_attribute sys_ipl_vm_parm_attr = 318 __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL); 319 320 static ssize_t sys_ipl_device_show(struct kobject *kobj, 321 struct kobj_attribute *attr, char *page) 322 { 323 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START; 324 325 switch (ipl_info.type) { 326 case IPL_TYPE_CCW: 327 return sprintf(page, "0.0.%04x\n", ipl_devno); 328 case IPL_TYPE_FCP: 329 case IPL_TYPE_FCP_DUMP: 330 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno); 331 default: 332 return 0; 333 } 334 } 335 336 static struct kobj_attribute sys_ipl_device_attr = 337 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL); 338 339 static ssize_t ipl_parameter_read(struct kobject *kobj, struct bin_attribute *attr, 340 char *buf, loff_t off, size_t count) 341 { 342 return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START, 343 IPL_PARMBLOCK_SIZE); 344 } 345 346 static struct bin_attribute ipl_parameter_attr = { 347 .attr = { 348 .name = "binary_parameter", 349 .mode = S_IRUGO, 350 }, 351 .size = PAGE_SIZE, 352 .read = &ipl_parameter_read, 353 }; 354 355 static ssize_t ipl_scp_data_read(struct kobject *kobj, struct bin_attribute *attr, 356 char *buf, loff_t off, size_t count) 357 { 358 unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len; 359 void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data; 360 361 return memory_read_from_buffer(buf, count, &off, scp_data, size); 362 } 363 364 static struct bin_attribute ipl_scp_data_attr = { 365 .attr = { 366 .name = "scp_data", 367 .mode = S_IRUGO, 368 }, 369 .size = PAGE_SIZE, 370 .read = ipl_scp_data_read, 371 }; 372 373 /* FCP ipl device attributes */ 374 375 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long) 376 IPL_PARMBLOCK_START->ipl_info.fcp.wwpn); 377 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long) 378 IPL_PARMBLOCK_START->ipl_info.fcp.lun); 379 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long) 380 IPL_PARMBLOCK_START->ipl_info.fcp.bootprog); 381 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long) 382 IPL_PARMBLOCK_START->ipl_info.fcp.br_lba); 383 384 static struct attribute *ipl_fcp_attrs[] = { 385 &sys_ipl_type_attr.attr, 386 &sys_ipl_device_attr.attr, 387 &sys_ipl_fcp_wwpn_attr.attr, 388 &sys_ipl_fcp_lun_attr.attr, 389 &sys_ipl_fcp_bootprog_attr.attr, 390 &sys_ipl_fcp_br_lba_attr.attr, 391 NULL, 392 }; 393 394 static struct attribute_group ipl_fcp_attr_group = { 395 .attrs = ipl_fcp_attrs, 396 }; 397 398 /* CCW ipl device attributes */ 399 400 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj, 401 struct kobj_attribute *attr, char *page) 402 { 403 char loadparm[LOADPARM_LEN + 1] = {}; 404 405 if (!sclp_ipl_info.is_valid) 406 return sprintf(page, "#unknown#\n"); 407 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN); 408 EBCASC(loadparm, LOADPARM_LEN); 409 strstrip(loadparm); 410 return sprintf(page, "%s\n", loadparm); 411 } 412 413 static struct kobj_attribute sys_ipl_ccw_loadparm_attr = 414 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL); 415 416 static struct attribute *ipl_ccw_attrs_vm[] = { 417 &sys_ipl_type_attr.attr, 418 &sys_ipl_device_attr.attr, 419 &sys_ipl_ccw_loadparm_attr.attr, 420 &sys_ipl_vm_parm_attr.attr, 421 NULL, 422 }; 423 424 static struct attribute *ipl_ccw_attrs_lpar[] = { 425 &sys_ipl_type_attr.attr, 426 &sys_ipl_device_attr.attr, 427 &sys_ipl_ccw_loadparm_attr.attr, 428 NULL, 429 }; 430 431 static struct attribute_group ipl_ccw_attr_group_vm = { 432 .attrs = ipl_ccw_attrs_vm, 433 }; 434 435 static struct attribute_group ipl_ccw_attr_group_lpar = { 436 .attrs = ipl_ccw_attrs_lpar 437 }; 438 439 /* NSS ipl device attributes */ 440 441 DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name); 442 443 static struct attribute *ipl_nss_attrs[] = { 444 &sys_ipl_type_attr.attr, 445 &sys_ipl_nss_name_attr.attr, 446 &sys_ipl_ccw_loadparm_attr.attr, 447 &sys_ipl_vm_parm_attr.attr, 448 NULL, 449 }; 450 451 static struct attribute_group ipl_nss_attr_group = { 452 .attrs = ipl_nss_attrs, 453 }; 454 455 /* UNKNOWN ipl device attributes */ 456 457 static struct attribute *ipl_unknown_attrs[] = { 458 &sys_ipl_type_attr.attr, 459 NULL, 460 }; 461 462 static struct attribute_group ipl_unknown_attr_group = { 463 .attrs = ipl_unknown_attrs, 464 }; 465 466 static struct kset *ipl_kset; 467 468 static int __init ipl_register_fcp_files(void) 469 { 470 int rc; 471 472 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group); 473 if (rc) 474 goto out; 475 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_parameter_attr); 476 if (rc) 477 goto out_ipl_parm; 478 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_scp_data_attr); 479 if (!rc) 480 goto out; 481 482 sysfs_remove_bin_file(&ipl_kset->kobj, &ipl_parameter_attr); 483 484 out_ipl_parm: 485 sysfs_remove_group(&ipl_kset->kobj, &ipl_fcp_attr_group); 486 out: 487 return rc; 488 } 489 490 static void ipl_run(struct shutdown_trigger *trigger) 491 { 492 diag308(DIAG308_IPL, NULL); 493 if (MACHINE_IS_VM) 494 __cpcmd("IPL", NULL, 0, NULL); 495 else if (ipl_info.type == IPL_TYPE_CCW) 496 reipl_ccw_dev(&ipl_info.data.ccw.dev_id); 497 } 498 499 static int __init ipl_init(void) 500 { 501 int rc; 502 503 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj); 504 if (!ipl_kset) { 505 rc = -ENOMEM; 506 goto out; 507 } 508 switch (ipl_info.type) { 509 case IPL_TYPE_CCW: 510 if (MACHINE_IS_VM) 511 rc = sysfs_create_group(&ipl_kset->kobj, 512 &ipl_ccw_attr_group_vm); 513 else 514 rc = sysfs_create_group(&ipl_kset->kobj, 515 &ipl_ccw_attr_group_lpar); 516 break; 517 case IPL_TYPE_FCP: 518 case IPL_TYPE_FCP_DUMP: 519 rc = ipl_register_fcp_files(); 520 break; 521 case IPL_TYPE_NSS: 522 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group); 523 break; 524 default: 525 rc = sysfs_create_group(&ipl_kset->kobj, 526 &ipl_unknown_attr_group); 527 break; 528 } 529 out: 530 if (rc) 531 panic("ipl_init failed: rc = %i\n", rc); 532 533 return 0; 534 } 535 536 static struct shutdown_action __refdata ipl_action = { 537 .name = SHUTDOWN_ACTION_IPL_STR, 538 .fn = ipl_run, 539 .init = ipl_init, 540 }; 541 542 /* 543 * reipl shutdown action: Reboot Linux on shutdown. 544 */ 545 546 /* VM IPL PARM attributes */ 547 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb, 548 char *page) 549 { 550 char vmparm[DIAG308_VMPARM_SIZE + 1] = {}; 551 552 reipl_get_ascii_vmparm(vmparm, ipb); 553 return sprintf(page, "%s\n", vmparm); 554 } 555 556 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb, 557 size_t vmparm_max, 558 const char *buf, size_t len) 559 { 560 int i, ip_len; 561 562 /* ignore trailing newline */ 563 ip_len = len; 564 if ((len > 0) && (buf[len - 1] == '\n')) 565 ip_len--; 566 567 if (ip_len > vmparm_max) 568 return -EINVAL; 569 570 /* parm is used to store kernel options, check for common chars */ 571 for (i = 0; i < ip_len; i++) 572 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i]))) 573 return -EINVAL; 574 575 memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE); 576 ipb->ipl_info.ccw.vm_parm_len = ip_len; 577 if (ip_len > 0) { 578 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID; 579 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len); 580 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len); 581 } else { 582 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID; 583 } 584 585 return len; 586 } 587 588 /* NSS wrapper */ 589 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj, 590 struct kobj_attribute *attr, char *page) 591 { 592 return reipl_generic_vmparm_show(reipl_block_nss, page); 593 } 594 595 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj, 596 struct kobj_attribute *attr, 597 const char *buf, size_t len) 598 { 599 return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len); 600 } 601 602 /* CCW wrapper */ 603 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj, 604 struct kobj_attribute *attr, char *page) 605 { 606 return reipl_generic_vmparm_show(reipl_block_ccw, page); 607 } 608 609 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj, 610 struct kobj_attribute *attr, 611 const char *buf, size_t len) 612 { 613 return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len); 614 } 615 616 static struct kobj_attribute sys_reipl_nss_vmparm_attr = 617 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show, 618 reipl_nss_vmparm_store); 619 static struct kobj_attribute sys_reipl_ccw_vmparm_attr = 620 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show, 621 reipl_ccw_vmparm_store); 622 623 /* FCP reipl device attributes */ 624 625 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n", 626 reipl_block_fcp->ipl_info.fcp.wwpn); 627 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n", 628 reipl_block_fcp->ipl_info.fcp.lun); 629 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n", 630 reipl_block_fcp->ipl_info.fcp.bootprog); 631 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n", 632 reipl_block_fcp->ipl_info.fcp.br_lba); 633 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n", 634 reipl_block_fcp->ipl_info.fcp.devno); 635 636 static struct attribute *reipl_fcp_attrs[] = { 637 &sys_reipl_fcp_device_attr.attr, 638 &sys_reipl_fcp_wwpn_attr.attr, 639 &sys_reipl_fcp_lun_attr.attr, 640 &sys_reipl_fcp_bootprog_attr.attr, 641 &sys_reipl_fcp_br_lba_attr.attr, 642 NULL, 643 }; 644 645 static struct attribute_group reipl_fcp_attr_group = { 646 .name = IPL_FCP_STR, 647 .attrs = reipl_fcp_attrs, 648 }; 649 650 /* CCW reipl device attributes */ 651 652 DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n", 653 reipl_block_ccw->ipl_info.ccw.devno); 654 655 static void reipl_get_ascii_loadparm(char *loadparm, 656 struct ipl_parameter_block *ibp) 657 { 658 memcpy(loadparm, ibp->ipl_info.ccw.load_parm, LOADPARM_LEN); 659 EBCASC(loadparm, LOADPARM_LEN); 660 loadparm[LOADPARM_LEN] = 0; 661 strstrip(loadparm); 662 } 663 664 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb, 665 char *page) 666 { 667 char buf[LOADPARM_LEN + 1]; 668 669 reipl_get_ascii_loadparm(buf, ipb); 670 return sprintf(page, "%s\n", buf); 671 } 672 673 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb, 674 const char *buf, size_t len) 675 { 676 int i, lp_len; 677 678 /* ignore trailing newline */ 679 lp_len = len; 680 if ((len > 0) && (buf[len - 1] == '\n')) 681 lp_len--; 682 /* loadparm can have max 8 characters and must not start with a blank */ 683 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' '))) 684 return -EINVAL; 685 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */ 686 for (i = 0; i < lp_len; i++) { 687 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') || 688 (buf[i] == '.')) 689 continue; 690 return -EINVAL; 691 } 692 /* initialize loadparm with blanks */ 693 memset(ipb->ipl_info.ccw.load_parm, ' ', LOADPARM_LEN); 694 /* copy and convert to ebcdic */ 695 memcpy(ipb->ipl_info.ccw.load_parm, buf, lp_len); 696 ASCEBC(ipb->ipl_info.ccw.load_parm, LOADPARM_LEN); 697 return len; 698 } 699 700 /* NSS wrapper */ 701 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj, 702 struct kobj_attribute *attr, char *page) 703 { 704 return reipl_generic_loadparm_show(reipl_block_nss, page); 705 } 706 707 static ssize_t reipl_nss_loadparm_store(struct kobject *kobj, 708 struct kobj_attribute *attr, 709 const char *buf, size_t len) 710 { 711 return reipl_generic_loadparm_store(reipl_block_nss, buf, len); 712 } 713 714 /* CCW wrapper */ 715 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj, 716 struct kobj_attribute *attr, char *page) 717 { 718 return reipl_generic_loadparm_show(reipl_block_ccw, page); 719 } 720 721 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj, 722 struct kobj_attribute *attr, 723 const char *buf, size_t len) 724 { 725 return reipl_generic_loadparm_store(reipl_block_ccw, buf, len); 726 } 727 728 static struct kobj_attribute sys_reipl_ccw_loadparm_attr = 729 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show, 730 reipl_ccw_loadparm_store); 731 732 static struct attribute *reipl_ccw_attrs_vm[] = { 733 &sys_reipl_ccw_device_attr.attr, 734 &sys_reipl_ccw_loadparm_attr.attr, 735 &sys_reipl_ccw_vmparm_attr.attr, 736 NULL, 737 }; 738 739 static struct attribute *reipl_ccw_attrs_lpar[] = { 740 &sys_reipl_ccw_device_attr.attr, 741 &sys_reipl_ccw_loadparm_attr.attr, 742 NULL, 743 }; 744 745 static struct attribute_group reipl_ccw_attr_group_vm = { 746 .name = IPL_CCW_STR, 747 .attrs = reipl_ccw_attrs_vm, 748 }; 749 750 static struct attribute_group reipl_ccw_attr_group_lpar = { 751 .name = IPL_CCW_STR, 752 .attrs = reipl_ccw_attrs_lpar, 753 }; 754 755 756 /* NSS reipl device attributes */ 757 static void reipl_get_ascii_nss_name(char *dst, 758 struct ipl_parameter_block *ipb) 759 { 760 memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE); 761 EBCASC(dst, NSS_NAME_SIZE); 762 dst[NSS_NAME_SIZE] = 0; 763 } 764 765 static ssize_t reipl_nss_name_show(struct kobject *kobj, 766 struct kobj_attribute *attr, char *page) 767 { 768 char nss_name[NSS_NAME_SIZE + 1] = {}; 769 770 reipl_get_ascii_nss_name(nss_name, reipl_block_nss); 771 return sprintf(page, "%s\n", nss_name); 772 } 773 774 static ssize_t reipl_nss_name_store(struct kobject *kobj, 775 struct kobj_attribute *attr, 776 const char *buf, size_t len) 777 { 778 int nss_len; 779 780 /* ignore trailing newline */ 781 nss_len = len; 782 if ((len > 0) && (buf[len - 1] == '\n')) 783 nss_len--; 784 785 if (nss_len > NSS_NAME_SIZE) 786 return -EINVAL; 787 788 memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE); 789 if (nss_len > 0) { 790 reipl_block_nss->ipl_info.ccw.vm_flags |= 791 DIAG308_VM_FLAGS_NSS_VALID; 792 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len); 793 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len); 794 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len); 795 } else { 796 reipl_block_nss->ipl_info.ccw.vm_flags &= 797 ~DIAG308_VM_FLAGS_NSS_VALID; 798 } 799 800 return len; 801 } 802 803 static struct kobj_attribute sys_reipl_nss_name_attr = 804 __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show, 805 reipl_nss_name_store); 806 807 static struct kobj_attribute sys_reipl_nss_loadparm_attr = 808 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show, 809 reipl_nss_loadparm_store); 810 811 static struct attribute *reipl_nss_attrs[] = { 812 &sys_reipl_nss_name_attr.attr, 813 &sys_reipl_nss_loadparm_attr.attr, 814 &sys_reipl_nss_vmparm_attr.attr, 815 NULL, 816 }; 817 818 static struct attribute_group reipl_nss_attr_group = { 819 .name = IPL_NSS_STR, 820 .attrs = reipl_nss_attrs, 821 }; 822 823 /* reipl type */ 824 825 static int reipl_set_type(enum ipl_type type) 826 { 827 if (!(reipl_capabilities & type)) 828 return -EINVAL; 829 830 switch(type) { 831 case IPL_TYPE_CCW: 832 if (diag308_set_works) 833 reipl_method = REIPL_METHOD_CCW_DIAG; 834 else if (MACHINE_IS_VM) 835 reipl_method = REIPL_METHOD_CCW_VM; 836 else 837 reipl_method = REIPL_METHOD_CCW_CIO; 838 break; 839 case IPL_TYPE_FCP: 840 if (diag308_set_works) 841 reipl_method = REIPL_METHOD_FCP_RW_DIAG; 842 else if (MACHINE_IS_VM) 843 reipl_method = REIPL_METHOD_FCP_RO_VM; 844 else 845 reipl_method = REIPL_METHOD_FCP_RO_DIAG; 846 break; 847 case IPL_TYPE_FCP_DUMP: 848 reipl_method = REIPL_METHOD_FCP_DUMP; 849 break; 850 case IPL_TYPE_NSS: 851 if (diag308_set_works) 852 reipl_method = REIPL_METHOD_NSS_DIAG; 853 else 854 reipl_method = REIPL_METHOD_NSS; 855 break; 856 case IPL_TYPE_UNKNOWN: 857 reipl_method = REIPL_METHOD_DEFAULT; 858 break; 859 default: 860 BUG(); 861 } 862 reipl_type = type; 863 return 0; 864 } 865 866 static ssize_t reipl_type_show(struct kobject *kobj, 867 struct kobj_attribute *attr, char *page) 868 { 869 return sprintf(page, "%s\n", ipl_type_str(reipl_type)); 870 } 871 872 static ssize_t reipl_type_store(struct kobject *kobj, 873 struct kobj_attribute *attr, 874 const char *buf, size_t len) 875 { 876 int rc = -EINVAL; 877 878 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0) 879 rc = reipl_set_type(IPL_TYPE_CCW); 880 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0) 881 rc = reipl_set_type(IPL_TYPE_FCP); 882 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0) 883 rc = reipl_set_type(IPL_TYPE_NSS); 884 return (rc != 0) ? rc : len; 885 } 886 887 static struct kobj_attribute reipl_type_attr = 888 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store); 889 890 static struct kset *reipl_kset; 891 892 static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb, 893 const enum ipl_method m) 894 { 895 char loadparm[LOADPARM_LEN + 1] = {}; 896 char vmparm[DIAG308_VMPARM_SIZE + 1] = {}; 897 char nss_name[NSS_NAME_SIZE + 1] = {}; 898 size_t pos = 0; 899 900 reipl_get_ascii_loadparm(loadparm, ipb); 901 reipl_get_ascii_nss_name(nss_name, ipb); 902 reipl_get_ascii_vmparm(vmparm, ipb); 903 904 switch (m) { 905 case REIPL_METHOD_CCW_VM: 906 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno); 907 break; 908 case REIPL_METHOD_NSS: 909 pos = sprintf(dst, "IPL %s", nss_name); 910 break; 911 default: 912 break; 913 } 914 if (strlen(loadparm) > 0) 915 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm); 916 if (strlen(vmparm) > 0) 917 sprintf(dst + pos, " PARM %s", vmparm); 918 } 919 920 static void reipl_run(struct shutdown_trigger *trigger) 921 { 922 struct ccw_dev_id devid; 923 static char buf[128]; 924 925 switch (reipl_method) { 926 case REIPL_METHOD_CCW_CIO: 927 devid.devno = reipl_block_ccw->ipl_info.ccw.devno; 928 devid.ssid = 0; 929 reipl_ccw_dev(&devid); 930 break; 931 case REIPL_METHOD_CCW_VM: 932 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM); 933 __cpcmd(buf, NULL, 0, NULL); 934 break; 935 case REIPL_METHOD_CCW_DIAG: 936 diag308(DIAG308_SET, reipl_block_ccw); 937 diag308(DIAG308_IPL, NULL); 938 break; 939 case REIPL_METHOD_FCP_RW_DIAG: 940 diag308(DIAG308_SET, reipl_block_fcp); 941 diag308(DIAG308_IPL, NULL); 942 break; 943 case REIPL_METHOD_FCP_RO_DIAG: 944 diag308(DIAG308_IPL, NULL); 945 break; 946 case REIPL_METHOD_FCP_RO_VM: 947 __cpcmd("IPL", NULL, 0, NULL); 948 break; 949 case REIPL_METHOD_NSS_DIAG: 950 diag308(DIAG308_SET, reipl_block_nss); 951 diag308(DIAG308_IPL, NULL); 952 break; 953 case REIPL_METHOD_NSS: 954 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS); 955 __cpcmd(buf, NULL, 0, NULL); 956 break; 957 case REIPL_METHOD_DEFAULT: 958 if (MACHINE_IS_VM) 959 __cpcmd("IPL", NULL, 0, NULL); 960 diag308(DIAG308_IPL, NULL); 961 break; 962 case REIPL_METHOD_FCP_DUMP: 963 default: 964 break; 965 } 966 disabled_wait((unsigned long) __builtin_return_address(0)); 967 } 968 969 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb) 970 { 971 ipb->hdr.len = IPL_PARM_BLK_CCW_LEN; 972 ipb->hdr.version = IPL_PARM_BLOCK_VERSION; 973 ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN; 974 ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW; 975 } 976 977 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb) 978 { 979 /* LOADPARM */ 980 /* check if read scp info worked and set loadparm */ 981 if (sclp_ipl_info.is_valid) 982 memcpy(ipb->ipl_info.ccw.load_parm, 983 &sclp_ipl_info.loadparm, LOADPARM_LEN); 984 else 985 /* read scp info failed: set empty loadparm (EBCDIC blanks) */ 986 memset(ipb->ipl_info.ccw.load_parm, 0x40, LOADPARM_LEN); 987 ipb->hdr.flags = DIAG308_FLAGS_LP_VALID; 988 989 /* VM PARM */ 990 if (MACHINE_IS_VM && diag308_set_works && 991 (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) { 992 993 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID; 994 ipb->ipl_info.ccw.vm_parm_len = 995 ipl_block.ipl_info.ccw.vm_parm_len; 996 memcpy(ipb->ipl_info.ccw.vm_parm, 997 ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE); 998 } 999 } 1000 1001 static int __init reipl_nss_init(void) 1002 { 1003 int rc; 1004 1005 if (!MACHINE_IS_VM) 1006 return 0; 1007 1008 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL); 1009 if (!reipl_block_nss) 1010 return -ENOMEM; 1011 1012 if (!diag308_set_works) 1013 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO; 1014 1015 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group); 1016 if (rc) 1017 return rc; 1018 1019 reipl_block_ccw_init(reipl_block_nss); 1020 if (ipl_info.type == IPL_TYPE_NSS) { 1021 memset(reipl_block_nss->ipl_info.ccw.nss_name, 1022 ' ', NSS_NAME_SIZE); 1023 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, 1024 kernel_nss_name, strlen(kernel_nss_name)); 1025 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE); 1026 reipl_block_nss->ipl_info.ccw.vm_flags |= 1027 DIAG308_VM_FLAGS_NSS_VALID; 1028 1029 reipl_block_ccw_fill_parms(reipl_block_nss); 1030 } 1031 1032 reipl_capabilities |= IPL_TYPE_NSS; 1033 return 0; 1034 } 1035 1036 static int __init reipl_ccw_init(void) 1037 { 1038 int rc; 1039 1040 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL); 1041 if (!reipl_block_ccw) 1042 return -ENOMEM; 1043 1044 if (MACHINE_IS_VM) { 1045 if (!diag308_set_works) 1046 sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO; 1047 rc = sysfs_create_group(&reipl_kset->kobj, 1048 &reipl_ccw_attr_group_vm); 1049 } else { 1050 if(!diag308_set_works) 1051 sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO; 1052 rc = sysfs_create_group(&reipl_kset->kobj, 1053 &reipl_ccw_attr_group_lpar); 1054 } 1055 if (rc) 1056 return rc; 1057 1058 reipl_block_ccw_init(reipl_block_ccw); 1059 if (ipl_info.type == IPL_TYPE_CCW) { 1060 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno; 1061 reipl_block_ccw_fill_parms(reipl_block_ccw); 1062 } 1063 1064 reipl_capabilities |= IPL_TYPE_CCW; 1065 return 0; 1066 } 1067 1068 static int __init reipl_fcp_init(void) 1069 { 1070 int rc; 1071 1072 if ((!diag308_set_works) && (ipl_info.type != IPL_TYPE_FCP)) 1073 return 0; 1074 if ((!diag308_set_works) && (ipl_info.type == IPL_TYPE_FCP)) 1075 make_attrs_ro(reipl_fcp_attrs); 1076 1077 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL); 1078 if (!reipl_block_fcp) 1079 return -ENOMEM; 1080 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_fcp_attr_group); 1081 if (rc) { 1082 free_page((unsigned long)reipl_block_fcp); 1083 return rc; 1084 } 1085 if (ipl_info.type == IPL_TYPE_FCP) { 1086 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE); 1087 } else { 1088 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN; 1089 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION; 1090 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN; 1091 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP; 1092 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL; 1093 } 1094 reipl_capabilities |= IPL_TYPE_FCP; 1095 return 0; 1096 } 1097 1098 static int __init reipl_init(void) 1099 { 1100 int rc; 1101 1102 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj); 1103 if (!reipl_kset) 1104 return -ENOMEM; 1105 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr); 1106 if (rc) { 1107 kset_unregister(reipl_kset); 1108 return rc; 1109 } 1110 rc = reipl_ccw_init(); 1111 if (rc) 1112 return rc; 1113 rc = reipl_fcp_init(); 1114 if (rc) 1115 return rc; 1116 rc = reipl_nss_init(); 1117 if (rc) 1118 return rc; 1119 rc = reipl_set_type(ipl_info.type); 1120 if (rc) 1121 return rc; 1122 return 0; 1123 } 1124 1125 static struct shutdown_action __refdata reipl_action = { 1126 .name = SHUTDOWN_ACTION_REIPL_STR, 1127 .fn = reipl_run, 1128 .init = reipl_init, 1129 }; 1130 1131 /* 1132 * dump shutdown action: Dump Linux on shutdown. 1133 */ 1134 1135 /* FCP dump device attributes */ 1136 1137 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n", 1138 dump_block_fcp->ipl_info.fcp.wwpn); 1139 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n", 1140 dump_block_fcp->ipl_info.fcp.lun); 1141 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n", 1142 dump_block_fcp->ipl_info.fcp.bootprog); 1143 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n", 1144 dump_block_fcp->ipl_info.fcp.br_lba); 1145 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n", 1146 dump_block_fcp->ipl_info.fcp.devno); 1147 1148 static struct attribute *dump_fcp_attrs[] = { 1149 &sys_dump_fcp_device_attr.attr, 1150 &sys_dump_fcp_wwpn_attr.attr, 1151 &sys_dump_fcp_lun_attr.attr, 1152 &sys_dump_fcp_bootprog_attr.attr, 1153 &sys_dump_fcp_br_lba_attr.attr, 1154 NULL, 1155 }; 1156 1157 static struct attribute_group dump_fcp_attr_group = { 1158 .name = IPL_FCP_STR, 1159 .attrs = dump_fcp_attrs, 1160 }; 1161 1162 /* CCW dump device attributes */ 1163 1164 DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n", 1165 dump_block_ccw->ipl_info.ccw.devno); 1166 1167 static struct attribute *dump_ccw_attrs[] = { 1168 &sys_dump_ccw_device_attr.attr, 1169 NULL, 1170 }; 1171 1172 static struct attribute_group dump_ccw_attr_group = { 1173 .name = IPL_CCW_STR, 1174 .attrs = dump_ccw_attrs, 1175 }; 1176 1177 /* dump type */ 1178 1179 static int dump_set_type(enum dump_type type) 1180 { 1181 if (!(dump_capabilities & type)) 1182 return -EINVAL; 1183 switch (type) { 1184 case DUMP_TYPE_CCW: 1185 if (diag308_set_works) 1186 dump_method = DUMP_METHOD_CCW_DIAG; 1187 else if (MACHINE_IS_VM) 1188 dump_method = DUMP_METHOD_CCW_VM; 1189 else 1190 dump_method = DUMP_METHOD_CCW_CIO; 1191 break; 1192 case DUMP_TYPE_FCP: 1193 dump_method = DUMP_METHOD_FCP_DIAG; 1194 break; 1195 default: 1196 dump_method = DUMP_METHOD_NONE; 1197 } 1198 dump_type = type; 1199 return 0; 1200 } 1201 1202 static ssize_t dump_type_show(struct kobject *kobj, 1203 struct kobj_attribute *attr, char *page) 1204 { 1205 return sprintf(page, "%s\n", dump_type_str(dump_type)); 1206 } 1207 1208 static ssize_t dump_type_store(struct kobject *kobj, 1209 struct kobj_attribute *attr, 1210 const char *buf, size_t len) 1211 { 1212 int rc = -EINVAL; 1213 1214 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0) 1215 rc = dump_set_type(DUMP_TYPE_NONE); 1216 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0) 1217 rc = dump_set_type(DUMP_TYPE_CCW); 1218 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0) 1219 rc = dump_set_type(DUMP_TYPE_FCP); 1220 return (rc != 0) ? rc : len; 1221 } 1222 1223 static struct kobj_attribute dump_type_attr = 1224 __ATTR(dump_type, 0644, dump_type_show, dump_type_store); 1225 1226 static struct kset *dump_kset; 1227 1228 static void dump_run(struct shutdown_trigger *trigger) 1229 { 1230 struct ccw_dev_id devid; 1231 static char buf[100]; 1232 1233 switch (dump_method) { 1234 case DUMP_METHOD_CCW_CIO: 1235 smp_send_stop(); 1236 devid.devno = dump_block_ccw->ipl_info.ccw.devno; 1237 devid.ssid = 0; 1238 reipl_ccw_dev(&devid); 1239 break; 1240 case DUMP_METHOD_CCW_VM: 1241 smp_send_stop(); 1242 sprintf(buf, "STORE STATUS"); 1243 __cpcmd(buf, NULL, 0, NULL); 1244 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno); 1245 __cpcmd(buf, NULL, 0, NULL); 1246 break; 1247 case DUMP_METHOD_CCW_DIAG: 1248 diag308(DIAG308_SET, dump_block_ccw); 1249 diag308(DIAG308_DUMP, NULL); 1250 break; 1251 case DUMP_METHOD_FCP_DIAG: 1252 diag308(DIAG308_SET, dump_block_fcp); 1253 diag308(DIAG308_DUMP, NULL); 1254 break; 1255 case DUMP_METHOD_NONE: 1256 default: 1257 return; 1258 } 1259 printk(KERN_EMERG "Dump failed!\n"); 1260 } 1261 1262 static int __init dump_ccw_init(void) 1263 { 1264 int rc; 1265 1266 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL); 1267 if (!dump_block_ccw) 1268 return -ENOMEM; 1269 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group); 1270 if (rc) { 1271 free_page((unsigned long)dump_block_ccw); 1272 return rc; 1273 } 1274 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN; 1275 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION; 1276 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN; 1277 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW; 1278 dump_capabilities |= DUMP_TYPE_CCW; 1279 return 0; 1280 } 1281 1282 static int __init dump_fcp_init(void) 1283 { 1284 int rc; 1285 1286 if (!sclp_ipl_info.has_dump) 1287 return 0; /* LDIPL DUMP is not installed */ 1288 if (!diag308_set_works) 1289 return 0; 1290 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL); 1291 if (!dump_block_fcp) 1292 return -ENOMEM; 1293 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group); 1294 if (rc) { 1295 free_page((unsigned long)dump_block_fcp); 1296 return rc; 1297 } 1298 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN; 1299 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION; 1300 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN; 1301 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP; 1302 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP; 1303 dump_capabilities |= DUMP_TYPE_FCP; 1304 return 0; 1305 } 1306 1307 static int __init dump_init(void) 1308 { 1309 int rc; 1310 1311 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj); 1312 if (!dump_kset) 1313 return -ENOMEM; 1314 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr); 1315 if (rc) { 1316 kset_unregister(dump_kset); 1317 return rc; 1318 } 1319 rc = dump_ccw_init(); 1320 if (rc) 1321 return rc; 1322 rc = dump_fcp_init(); 1323 if (rc) 1324 return rc; 1325 dump_set_type(DUMP_TYPE_NONE); 1326 return 0; 1327 } 1328 1329 static struct shutdown_action __refdata dump_action = { 1330 .name = SHUTDOWN_ACTION_DUMP_STR, 1331 .fn = dump_run, 1332 .init = dump_init, 1333 }; 1334 1335 /* 1336 * vmcmd shutdown action: Trigger vm command on shutdown. 1337 */ 1338 1339 static char vmcmd_on_reboot[128]; 1340 static char vmcmd_on_panic[128]; 1341 static char vmcmd_on_halt[128]; 1342 static char vmcmd_on_poff[128]; 1343 1344 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot); 1345 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic); 1346 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt); 1347 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff); 1348 1349 static struct attribute *vmcmd_attrs[] = { 1350 &sys_vmcmd_on_reboot_attr.attr, 1351 &sys_vmcmd_on_panic_attr.attr, 1352 &sys_vmcmd_on_halt_attr.attr, 1353 &sys_vmcmd_on_poff_attr.attr, 1354 NULL, 1355 }; 1356 1357 static struct attribute_group vmcmd_attr_group = { 1358 .attrs = vmcmd_attrs, 1359 }; 1360 1361 static struct kset *vmcmd_kset; 1362 1363 static void vmcmd_run(struct shutdown_trigger *trigger) 1364 { 1365 char *cmd, *next_cmd; 1366 1367 if (strcmp(trigger->name, ON_REIPL_STR) == 0) 1368 cmd = vmcmd_on_reboot; 1369 else if (strcmp(trigger->name, ON_PANIC_STR) == 0) 1370 cmd = vmcmd_on_panic; 1371 else if (strcmp(trigger->name, ON_HALT_STR) == 0) 1372 cmd = vmcmd_on_halt; 1373 else if (strcmp(trigger->name, ON_POFF_STR) == 0) 1374 cmd = vmcmd_on_poff; 1375 else 1376 return; 1377 1378 if (strlen(cmd) == 0) 1379 return; 1380 do { 1381 next_cmd = strchr(cmd, '\n'); 1382 if (next_cmd) { 1383 next_cmd[0] = 0; 1384 next_cmd += 1; 1385 } 1386 __cpcmd(cmd, NULL, 0, NULL); 1387 cmd = next_cmd; 1388 } while (cmd != NULL); 1389 } 1390 1391 static int vmcmd_init(void) 1392 { 1393 if (!MACHINE_IS_VM) 1394 return -ENOTSUPP; 1395 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj); 1396 if (!vmcmd_kset) 1397 return -ENOMEM; 1398 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group); 1399 } 1400 1401 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR, 1402 vmcmd_run, vmcmd_init}; 1403 1404 /* 1405 * stop shutdown action: Stop Linux on shutdown. 1406 */ 1407 1408 static void stop_run(struct shutdown_trigger *trigger) 1409 { 1410 if (strcmp(trigger->name, ON_PANIC_STR) == 0) 1411 disabled_wait((unsigned long) __builtin_return_address(0)); 1412 else { 1413 signal_processor(smp_processor_id(), sigp_stop); 1414 for (;;); 1415 } 1416 } 1417 1418 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR, 1419 stop_run, NULL}; 1420 1421 /* action list */ 1422 1423 static struct shutdown_action *shutdown_actions_list[] = { 1424 &ipl_action, &reipl_action, &dump_action, &vmcmd_action, &stop_action}; 1425 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *)) 1426 1427 /* 1428 * Trigger section 1429 */ 1430 1431 static struct kset *shutdown_actions_kset; 1432 1433 static int set_trigger(const char *buf, struct shutdown_trigger *trigger, 1434 size_t len) 1435 { 1436 int i; 1437 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) { 1438 if (!shutdown_actions_list[i]) 1439 continue; 1440 if (strncmp(buf, shutdown_actions_list[i]->name, 1441 strlen(shutdown_actions_list[i]->name)) == 0) { 1442 trigger->action = shutdown_actions_list[i]; 1443 return len; 1444 } 1445 } 1446 return -EINVAL; 1447 } 1448 1449 /* on reipl */ 1450 1451 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR, 1452 &reipl_action}; 1453 1454 static ssize_t on_reboot_show(struct kobject *kobj, 1455 struct kobj_attribute *attr, char *page) 1456 { 1457 return sprintf(page, "%s\n", on_reboot_trigger.action->name); 1458 } 1459 1460 static ssize_t on_reboot_store(struct kobject *kobj, 1461 struct kobj_attribute *attr, 1462 const char *buf, size_t len) 1463 { 1464 return set_trigger(buf, &on_reboot_trigger, len); 1465 } 1466 1467 static struct kobj_attribute on_reboot_attr = 1468 __ATTR(on_reboot, 0644, on_reboot_show, on_reboot_store); 1469 1470 static void do_machine_restart(char *__unused) 1471 { 1472 smp_send_stop(); 1473 on_reboot_trigger.action->fn(&on_reboot_trigger); 1474 reipl_run(NULL); 1475 } 1476 void (*_machine_restart)(char *command) = do_machine_restart; 1477 1478 /* on panic */ 1479 1480 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action}; 1481 1482 static ssize_t on_panic_show(struct kobject *kobj, 1483 struct kobj_attribute *attr, char *page) 1484 { 1485 return sprintf(page, "%s\n", on_panic_trigger.action->name); 1486 } 1487 1488 static ssize_t on_panic_store(struct kobject *kobj, 1489 struct kobj_attribute *attr, 1490 const char *buf, size_t len) 1491 { 1492 return set_trigger(buf, &on_panic_trigger, len); 1493 } 1494 1495 static struct kobj_attribute on_panic_attr = 1496 __ATTR(on_panic, 0644, on_panic_show, on_panic_store); 1497 1498 static void do_panic(void) 1499 { 1500 on_panic_trigger.action->fn(&on_panic_trigger); 1501 stop_run(&on_panic_trigger); 1502 } 1503 1504 /* on halt */ 1505 1506 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action}; 1507 1508 static ssize_t on_halt_show(struct kobject *kobj, 1509 struct kobj_attribute *attr, char *page) 1510 { 1511 return sprintf(page, "%s\n", on_halt_trigger.action->name); 1512 } 1513 1514 static ssize_t on_halt_store(struct kobject *kobj, 1515 struct kobj_attribute *attr, 1516 const char *buf, size_t len) 1517 { 1518 return set_trigger(buf, &on_halt_trigger, len); 1519 } 1520 1521 static struct kobj_attribute on_halt_attr = 1522 __ATTR(on_halt, 0644, on_halt_show, on_halt_store); 1523 1524 1525 static void do_machine_halt(void) 1526 { 1527 smp_send_stop(); 1528 on_halt_trigger.action->fn(&on_halt_trigger); 1529 stop_run(&on_halt_trigger); 1530 } 1531 void (*_machine_halt)(void) = do_machine_halt; 1532 1533 /* on power off */ 1534 1535 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action}; 1536 1537 static ssize_t on_poff_show(struct kobject *kobj, 1538 struct kobj_attribute *attr, char *page) 1539 { 1540 return sprintf(page, "%s\n", on_poff_trigger.action->name); 1541 } 1542 1543 static ssize_t on_poff_store(struct kobject *kobj, 1544 struct kobj_attribute *attr, 1545 const char *buf, size_t len) 1546 { 1547 return set_trigger(buf, &on_poff_trigger, len); 1548 } 1549 1550 static struct kobj_attribute on_poff_attr = 1551 __ATTR(on_poff, 0644, on_poff_show, on_poff_store); 1552 1553 1554 static void do_machine_power_off(void) 1555 { 1556 smp_send_stop(); 1557 on_poff_trigger.action->fn(&on_poff_trigger); 1558 stop_run(&on_poff_trigger); 1559 } 1560 void (*_machine_power_off)(void) = do_machine_power_off; 1561 1562 static void __init shutdown_triggers_init(void) 1563 { 1564 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL, 1565 firmware_kobj); 1566 if (!shutdown_actions_kset) 1567 goto fail; 1568 if (sysfs_create_file(&shutdown_actions_kset->kobj, 1569 &on_reboot_attr.attr)) 1570 goto fail; 1571 if (sysfs_create_file(&shutdown_actions_kset->kobj, 1572 &on_panic_attr.attr)) 1573 goto fail; 1574 if (sysfs_create_file(&shutdown_actions_kset->kobj, 1575 &on_halt_attr.attr)) 1576 goto fail; 1577 if (sysfs_create_file(&shutdown_actions_kset->kobj, 1578 &on_poff_attr.attr)) 1579 goto fail; 1580 1581 return; 1582 fail: 1583 panic("shutdown_triggers_init failed\n"); 1584 } 1585 1586 static void __init shutdown_actions_init(void) 1587 { 1588 int i; 1589 1590 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) { 1591 if (!shutdown_actions_list[i]->init) 1592 continue; 1593 if (shutdown_actions_list[i]->init()) 1594 shutdown_actions_list[i] = NULL; 1595 } 1596 } 1597 1598 static int __init s390_ipl_init(void) 1599 { 1600 sclp_get_ipl_info(&sclp_ipl_info); 1601 shutdown_actions_init(); 1602 shutdown_triggers_init(); 1603 return 0; 1604 } 1605 1606 __initcall(s390_ipl_init); 1607 1608 static void __init strncpy_skip_quote(char *dst, char *src, int n) 1609 { 1610 int sx, dx; 1611 1612 dx = 0; 1613 for (sx = 0; src[sx] != 0; sx++) { 1614 if (src[sx] == '"') 1615 continue; 1616 dst[dx++] = src[sx]; 1617 if (dx >= n) 1618 break; 1619 } 1620 } 1621 1622 static int __init vmcmd_on_reboot_setup(char *str) 1623 { 1624 if (!MACHINE_IS_VM) 1625 return 1; 1626 strncpy_skip_quote(vmcmd_on_reboot, str, 127); 1627 vmcmd_on_reboot[127] = 0; 1628 on_reboot_trigger.action = &vmcmd_action; 1629 return 1; 1630 } 1631 __setup("vmreboot=", vmcmd_on_reboot_setup); 1632 1633 static int __init vmcmd_on_panic_setup(char *str) 1634 { 1635 if (!MACHINE_IS_VM) 1636 return 1; 1637 strncpy_skip_quote(vmcmd_on_panic, str, 127); 1638 vmcmd_on_panic[127] = 0; 1639 on_panic_trigger.action = &vmcmd_action; 1640 return 1; 1641 } 1642 __setup("vmpanic=", vmcmd_on_panic_setup); 1643 1644 static int __init vmcmd_on_halt_setup(char *str) 1645 { 1646 if (!MACHINE_IS_VM) 1647 return 1; 1648 strncpy_skip_quote(vmcmd_on_halt, str, 127); 1649 vmcmd_on_halt[127] = 0; 1650 on_halt_trigger.action = &vmcmd_action; 1651 return 1; 1652 } 1653 __setup("vmhalt=", vmcmd_on_halt_setup); 1654 1655 static int __init vmcmd_on_poff_setup(char *str) 1656 { 1657 if (!MACHINE_IS_VM) 1658 return 1; 1659 strncpy_skip_quote(vmcmd_on_poff, str, 127); 1660 vmcmd_on_poff[127] = 0; 1661 on_poff_trigger.action = &vmcmd_action; 1662 return 1; 1663 } 1664 __setup("vmpoff=", vmcmd_on_poff_setup); 1665 1666 static int on_panic_notify(struct notifier_block *self, 1667 unsigned long event, void *data) 1668 { 1669 do_panic(); 1670 return NOTIFY_OK; 1671 } 1672 1673 static struct notifier_block on_panic_nb = { 1674 .notifier_call = on_panic_notify, 1675 .priority = 0, 1676 }; 1677 1678 void __init setup_ipl(void) 1679 { 1680 ipl_info.type = get_ipl_type(); 1681 switch (ipl_info.type) { 1682 case IPL_TYPE_CCW: 1683 ipl_info.data.ccw.dev_id.devno = ipl_devno; 1684 ipl_info.data.ccw.dev_id.ssid = 0; 1685 break; 1686 case IPL_TYPE_FCP: 1687 case IPL_TYPE_FCP_DUMP: 1688 ipl_info.data.fcp.dev_id.devno = 1689 IPL_PARMBLOCK_START->ipl_info.fcp.devno; 1690 ipl_info.data.fcp.dev_id.ssid = 0; 1691 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn; 1692 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun; 1693 break; 1694 case IPL_TYPE_NSS: 1695 strncpy(ipl_info.data.nss.name, kernel_nss_name, 1696 sizeof(ipl_info.data.nss.name)); 1697 break; 1698 case IPL_TYPE_UNKNOWN: 1699 default: 1700 /* We have no info to copy */ 1701 break; 1702 } 1703 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb); 1704 } 1705 1706 void __init ipl_update_parameters(void) 1707 { 1708 int rc; 1709 1710 rc = diag308(DIAG308_STORE, &ipl_block); 1711 if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG)) 1712 diag308_set_works = 1; 1713 } 1714 1715 void __init ipl_save_parameters(void) 1716 { 1717 struct cio_iplinfo iplinfo; 1718 unsigned int *ipl_ptr; 1719 void *src, *dst; 1720 1721 if (cio_get_iplinfo(&iplinfo)) 1722 return; 1723 1724 ipl_devno = iplinfo.devno; 1725 ipl_flags |= IPL_DEVNO_VALID; 1726 if (!iplinfo.is_qdio) 1727 return; 1728 ipl_flags |= IPL_PARMBLOCK_VALID; 1729 ipl_ptr = (unsigned int *)__LC_IPL_PARMBLOCK_PTR; 1730 src = (void *)(unsigned long)*ipl_ptr; 1731 dst = (void *)IPL_PARMBLOCK_ORIGIN; 1732 memmove(dst, src, PAGE_SIZE); 1733 *ipl_ptr = IPL_PARMBLOCK_ORIGIN; 1734 } 1735 1736 static LIST_HEAD(rcall); 1737 static DEFINE_MUTEX(rcall_mutex); 1738 1739 void register_reset_call(struct reset_call *reset) 1740 { 1741 mutex_lock(&rcall_mutex); 1742 list_add(&reset->list, &rcall); 1743 mutex_unlock(&rcall_mutex); 1744 } 1745 EXPORT_SYMBOL_GPL(register_reset_call); 1746 1747 void unregister_reset_call(struct reset_call *reset) 1748 { 1749 mutex_lock(&rcall_mutex); 1750 list_del(&reset->list); 1751 mutex_unlock(&rcall_mutex); 1752 } 1753 EXPORT_SYMBOL_GPL(unregister_reset_call); 1754 1755 static void do_reset_calls(void) 1756 { 1757 struct reset_call *reset; 1758 1759 list_for_each_entry(reset, &rcall, list) 1760 reset->fn(); 1761 } 1762 1763 u32 dump_prefix_page; 1764 1765 void s390_reset_system(void) 1766 { 1767 struct _lowcore *lc; 1768 1769 lc = (struct _lowcore *)(unsigned long) store_prefix(); 1770 1771 /* Stack for interrupt/machine check handler */ 1772 lc->panic_stack = S390_lowcore.panic_stack; 1773 1774 /* Save prefix page address for dump case */ 1775 dump_prefix_page = (u32)(unsigned long) lc; 1776 1777 /* Disable prefixing */ 1778 set_prefix(0); 1779 1780 /* Disable lowcore protection */ 1781 __ctl_clear_bit(0,28); 1782 1783 /* Set new machine check handler */ 1784 S390_lowcore.mcck_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK; 1785 S390_lowcore.mcck_new_psw.addr = 1786 PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler; 1787 1788 /* Set new program check handler */ 1789 S390_lowcore.program_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK; 1790 S390_lowcore.program_new_psw.addr = 1791 PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler; 1792 1793 do_reset_calls(); 1794 } 1795 1796