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/checksum.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 * The following 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 #define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl" 67 68 struct shutdown_action { 69 char *name; 70 void (*fn) (struct shutdown_trigger *trigger); 71 int (*init) (void); 72 }; 73 74 static char *ipl_type_str(enum ipl_type type) 75 { 76 switch (type) { 77 case IPL_TYPE_CCW: 78 return IPL_CCW_STR; 79 case IPL_TYPE_FCP: 80 return IPL_FCP_STR; 81 case IPL_TYPE_FCP_DUMP: 82 return IPL_FCP_DUMP_STR; 83 case IPL_TYPE_NSS: 84 return IPL_NSS_STR; 85 case IPL_TYPE_UNKNOWN: 86 default: 87 return IPL_UNKNOWN_STR; 88 } 89 } 90 91 enum dump_type { 92 DUMP_TYPE_NONE = 1, 93 DUMP_TYPE_CCW = 2, 94 DUMP_TYPE_FCP = 4, 95 }; 96 97 static char *dump_type_str(enum dump_type type) 98 { 99 switch (type) { 100 case DUMP_TYPE_NONE: 101 return DUMP_NONE_STR; 102 case DUMP_TYPE_CCW: 103 return DUMP_CCW_STR; 104 case DUMP_TYPE_FCP: 105 return DUMP_FCP_STR; 106 default: 107 return NULL; 108 } 109 } 110 111 /* 112 * Must be in data section since the bss section 113 * is not cleared when these are accessed. 114 */ 115 static u16 ipl_devno __attribute__((__section__(".data"))) = 0; 116 u32 ipl_flags __attribute__((__section__(".data"))) = 0; 117 118 enum ipl_method { 119 REIPL_METHOD_CCW_CIO, 120 REIPL_METHOD_CCW_DIAG, 121 REIPL_METHOD_CCW_VM, 122 REIPL_METHOD_FCP_RO_DIAG, 123 REIPL_METHOD_FCP_RW_DIAG, 124 REIPL_METHOD_FCP_RO_VM, 125 REIPL_METHOD_FCP_DUMP, 126 REIPL_METHOD_NSS, 127 REIPL_METHOD_NSS_DIAG, 128 REIPL_METHOD_DEFAULT, 129 }; 130 131 enum dump_method { 132 DUMP_METHOD_NONE, 133 DUMP_METHOD_CCW_CIO, 134 DUMP_METHOD_CCW_DIAG, 135 DUMP_METHOD_CCW_VM, 136 DUMP_METHOD_FCP_DIAG, 137 }; 138 139 static int diag308_set_works = 0; 140 141 static struct ipl_parameter_block ipl_block; 142 143 static int reipl_capabilities = IPL_TYPE_UNKNOWN; 144 145 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN; 146 static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT; 147 static struct ipl_parameter_block *reipl_block_fcp; 148 static struct ipl_parameter_block *reipl_block_ccw; 149 static struct ipl_parameter_block *reipl_block_nss; 150 static struct ipl_parameter_block *reipl_block_actual; 151 152 static int dump_capabilities = DUMP_TYPE_NONE; 153 static enum dump_type dump_type = DUMP_TYPE_NONE; 154 static enum dump_method dump_method = DUMP_METHOD_NONE; 155 static struct ipl_parameter_block *dump_block_fcp; 156 static struct ipl_parameter_block *dump_block_ccw; 157 158 static struct sclp_ipl_info sclp_ipl_info; 159 160 int diag308(unsigned long subcode, void *addr) 161 { 162 register unsigned long _addr asm("0") = (unsigned long) addr; 163 register unsigned long _rc asm("1") = 0; 164 165 asm volatile( 166 " diag %0,%2,0x308\n" 167 "0:\n" 168 EX_TABLE(0b,0b) 169 : "+d" (_addr), "+d" (_rc) 170 : "d" (subcode) : "cc", "memory"); 171 return _rc; 172 } 173 EXPORT_SYMBOL_GPL(diag308); 174 175 /* SYSFS */ 176 177 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \ 178 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \ 179 struct kobj_attribute *attr, \ 180 char *page) \ 181 { \ 182 return sprintf(page, _format, _value); \ 183 } \ 184 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ 185 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL); 186 187 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \ 188 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \ 189 struct kobj_attribute *attr, \ 190 char *page) \ 191 { \ 192 return sprintf(page, _fmt_out, \ 193 (unsigned long long) _value); \ 194 } \ 195 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \ 196 struct kobj_attribute *attr, \ 197 const char *buf, size_t len) \ 198 { \ 199 unsigned long long value; \ 200 if (sscanf(buf, _fmt_in, &value) != 1) \ 201 return -EINVAL; \ 202 _value = value; \ 203 return len; \ 204 } \ 205 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ 206 __ATTR(_name,(S_IRUGO | S_IWUSR), \ 207 sys_##_prefix##_##_name##_show, \ 208 sys_##_prefix##_##_name##_store); 209 210 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\ 211 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \ 212 struct kobj_attribute *attr, \ 213 char *page) \ 214 { \ 215 return sprintf(page, _fmt_out, _value); \ 216 } \ 217 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \ 218 struct kobj_attribute *attr, \ 219 const char *buf, size_t len) \ 220 { \ 221 strncpy(_value, buf, sizeof(_value) - 1); \ 222 strstrip(_value); \ 223 return len; \ 224 } \ 225 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ 226 __ATTR(_name,(S_IRUGO | S_IWUSR), \ 227 sys_##_prefix##_##_name##_show, \ 228 sys_##_prefix##_##_name##_store); 229 230 static void make_attrs_ro(struct attribute **attrs) 231 { 232 while (*attrs) { 233 (*attrs)->mode = S_IRUGO; 234 attrs++; 235 } 236 } 237 238 /* 239 * ipl section 240 */ 241 242 static __init enum ipl_type get_ipl_type(void) 243 { 244 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START; 245 246 if (ipl_flags & IPL_NSS_VALID) 247 return IPL_TYPE_NSS; 248 if (!(ipl_flags & IPL_DEVNO_VALID)) 249 return IPL_TYPE_UNKNOWN; 250 if (!(ipl_flags & IPL_PARMBLOCK_VALID)) 251 return IPL_TYPE_CCW; 252 if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION) 253 return IPL_TYPE_UNKNOWN; 254 if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP) 255 return IPL_TYPE_UNKNOWN; 256 if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP) 257 return IPL_TYPE_FCP_DUMP; 258 return IPL_TYPE_FCP; 259 } 260 261 struct ipl_info ipl_info; 262 EXPORT_SYMBOL_GPL(ipl_info); 263 264 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr, 265 char *page) 266 { 267 return sprintf(page, "%s\n", ipl_type_str(ipl_info.type)); 268 } 269 270 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type); 271 272 /* VM IPL PARM routines */ 273 static void reipl_get_ascii_vmparm(char *dest, 274 const struct ipl_parameter_block *ipb) 275 { 276 int i; 277 int len = 0; 278 char has_lowercase = 0; 279 280 if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) && 281 (ipb->ipl_info.ccw.vm_parm_len > 0)) { 282 283 len = ipb->ipl_info.ccw.vm_parm_len; 284 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len); 285 /* If at least one character is lowercase, we assume mixed 286 * case; otherwise we convert everything to lowercase. 287 */ 288 for (i = 0; i < len; i++) 289 if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */ 290 (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */ 291 (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */ 292 has_lowercase = 1; 293 break; 294 } 295 if (!has_lowercase) 296 EBC_TOLOWER(dest, len); 297 EBCASC(dest, len); 298 } 299 dest[len] = 0; 300 } 301 302 void get_ipl_vmparm(char *dest) 303 { 304 if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW)) 305 reipl_get_ascii_vmparm(dest, &ipl_block); 306 else 307 dest[0] = 0; 308 } 309 310 static ssize_t ipl_vm_parm_show(struct kobject *kobj, 311 struct kobj_attribute *attr, char *page) 312 { 313 char parm[DIAG308_VMPARM_SIZE + 1] = {}; 314 315 get_ipl_vmparm(parm); 316 return sprintf(page, "%s\n", parm); 317 } 318 319 static struct kobj_attribute sys_ipl_vm_parm_attr = 320 __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL); 321 322 static ssize_t sys_ipl_device_show(struct kobject *kobj, 323 struct kobj_attribute *attr, char *page) 324 { 325 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START; 326 327 switch (ipl_info.type) { 328 case IPL_TYPE_CCW: 329 return sprintf(page, "0.0.%04x\n", ipl_devno); 330 case IPL_TYPE_FCP: 331 case IPL_TYPE_FCP_DUMP: 332 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno); 333 default: 334 return 0; 335 } 336 } 337 338 static struct kobj_attribute sys_ipl_device_attr = 339 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL); 340 341 static ssize_t ipl_parameter_read(struct kobject *kobj, struct bin_attribute *attr, 342 char *buf, loff_t off, size_t count) 343 { 344 return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START, 345 IPL_PARMBLOCK_SIZE); 346 } 347 348 static struct bin_attribute ipl_parameter_attr = { 349 .attr = { 350 .name = "binary_parameter", 351 .mode = S_IRUGO, 352 }, 353 .size = PAGE_SIZE, 354 .read = &ipl_parameter_read, 355 }; 356 357 static ssize_t ipl_scp_data_read(struct kobject *kobj, struct bin_attribute *attr, 358 char *buf, loff_t off, size_t count) 359 { 360 unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len; 361 void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data; 362 363 return memory_read_from_buffer(buf, count, &off, scp_data, size); 364 } 365 366 static struct bin_attribute ipl_scp_data_attr = { 367 .attr = { 368 .name = "scp_data", 369 .mode = S_IRUGO, 370 }, 371 .size = PAGE_SIZE, 372 .read = ipl_scp_data_read, 373 }; 374 375 /* FCP ipl device attributes */ 376 377 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long) 378 IPL_PARMBLOCK_START->ipl_info.fcp.wwpn); 379 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long) 380 IPL_PARMBLOCK_START->ipl_info.fcp.lun); 381 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long) 382 IPL_PARMBLOCK_START->ipl_info.fcp.bootprog); 383 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long) 384 IPL_PARMBLOCK_START->ipl_info.fcp.br_lba); 385 386 static struct attribute *ipl_fcp_attrs[] = { 387 &sys_ipl_type_attr.attr, 388 &sys_ipl_device_attr.attr, 389 &sys_ipl_fcp_wwpn_attr.attr, 390 &sys_ipl_fcp_lun_attr.attr, 391 &sys_ipl_fcp_bootprog_attr.attr, 392 &sys_ipl_fcp_br_lba_attr.attr, 393 NULL, 394 }; 395 396 static struct attribute_group ipl_fcp_attr_group = { 397 .attrs = ipl_fcp_attrs, 398 }; 399 400 /* CCW ipl device attributes */ 401 402 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj, 403 struct kobj_attribute *attr, char *page) 404 { 405 char loadparm[LOADPARM_LEN + 1] = {}; 406 407 if (!sclp_ipl_info.is_valid) 408 return sprintf(page, "#unknown#\n"); 409 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN); 410 EBCASC(loadparm, LOADPARM_LEN); 411 strstrip(loadparm); 412 return sprintf(page, "%s\n", loadparm); 413 } 414 415 static struct kobj_attribute sys_ipl_ccw_loadparm_attr = 416 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL); 417 418 static struct attribute *ipl_ccw_attrs_vm[] = { 419 &sys_ipl_type_attr.attr, 420 &sys_ipl_device_attr.attr, 421 &sys_ipl_ccw_loadparm_attr.attr, 422 &sys_ipl_vm_parm_attr.attr, 423 NULL, 424 }; 425 426 static struct attribute *ipl_ccw_attrs_lpar[] = { 427 &sys_ipl_type_attr.attr, 428 &sys_ipl_device_attr.attr, 429 &sys_ipl_ccw_loadparm_attr.attr, 430 NULL, 431 }; 432 433 static struct attribute_group ipl_ccw_attr_group_vm = { 434 .attrs = ipl_ccw_attrs_vm, 435 }; 436 437 static struct attribute_group ipl_ccw_attr_group_lpar = { 438 .attrs = ipl_ccw_attrs_lpar 439 }; 440 441 /* NSS ipl device attributes */ 442 443 DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name); 444 445 static struct attribute *ipl_nss_attrs[] = { 446 &sys_ipl_type_attr.attr, 447 &sys_ipl_nss_name_attr.attr, 448 &sys_ipl_ccw_loadparm_attr.attr, 449 &sys_ipl_vm_parm_attr.attr, 450 NULL, 451 }; 452 453 static struct attribute_group ipl_nss_attr_group = { 454 .attrs = ipl_nss_attrs, 455 }; 456 457 /* UNKNOWN ipl device attributes */ 458 459 static struct attribute *ipl_unknown_attrs[] = { 460 &sys_ipl_type_attr.attr, 461 NULL, 462 }; 463 464 static struct attribute_group ipl_unknown_attr_group = { 465 .attrs = ipl_unknown_attrs, 466 }; 467 468 static struct kset *ipl_kset; 469 470 static int __init ipl_register_fcp_files(void) 471 { 472 int rc; 473 474 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group); 475 if (rc) 476 goto out; 477 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_parameter_attr); 478 if (rc) 479 goto out_ipl_parm; 480 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_scp_data_attr); 481 if (!rc) 482 goto out; 483 484 sysfs_remove_bin_file(&ipl_kset->kobj, &ipl_parameter_attr); 485 486 out_ipl_parm: 487 sysfs_remove_group(&ipl_kset->kobj, &ipl_fcp_attr_group); 488 out: 489 return rc; 490 } 491 492 static void ipl_run(struct shutdown_trigger *trigger) 493 { 494 diag308(DIAG308_IPL, NULL); 495 if (MACHINE_IS_VM) 496 __cpcmd("IPL", NULL, 0, NULL); 497 else if (ipl_info.type == IPL_TYPE_CCW) 498 reipl_ccw_dev(&ipl_info.data.ccw.dev_id); 499 } 500 501 static int __init ipl_init(void) 502 { 503 int rc; 504 505 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj); 506 if (!ipl_kset) { 507 rc = -ENOMEM; 508 goto out; 509 } 510 switch (ipl_info.type) { 511 case IPL_TYPE_CCW: 512 if (MACHINE_IS_VM) 513 rc = sysfs_create_group(&ipl_kset->kobj, 514 &ipl_ccw_attr_group_vm); 515 else 516 rc = sysfs_create_group(&ipl_kset->kobj, 517 &ipl_ccw_attr_group_lpar); 518 break; 519 case IPL_TYPE_FCP: 520 case IPL_TYPE_FCP_DUMP: 521 rc = ipl_register_fcp_files(); 522 break; 523 case IPL_TYPE_NSS: 524 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group); 525 break; 526 default: 527 rc = sysfs_create_group(&ipl_kset->kobj, 528 &ipl_unknown_attr_group); 529 break; 530 } 531 out: 532 if (rc) 533 panic("ipl_init failed: rc = %i\n", rc); 534 535 return 0; 536 } 537 538 static struct shutdown_action __refdata ipl_action = { 539 .name = SHUTDOWN_ACTION_IPL_STR, 540 .fn = ipl_run, 541 .init = ipl_init, 542 }; 543 544 /* 545 * reipl shutdown action: Reboot Linux on shutdown. 546 */ 547 548 /* VM IPL PARM attributes */ 549 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb, 550 char *page) 551 { 552 char vmparm[DIAG308_VMPARM_SIZE + 1] = {}; 553 554 reipl_get_ascii_vmparm(vmparm, ipb); 555 return sprintf(page, "%s\n", vmparm); 556 } 557 558 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb, 559 size_t vmparm_max, 560 const char *buf, size_t len) 561 { 562 int i, ip_len; 563 564 /* ignore trailing newline */ 565 ip_len = len; 566 if ((len > 0) && (buf[len - 1] == '\n')) 567 ip_len--; 568 569 if (ip_len > vmparm_max) 570 return -EINVAL; 571 572 /* parm is used to store kernel options, check for common chars */ 573 for (i = 0; i < ip_len; i++) 574 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i]))) 575 return -EINVAL; 576 577 memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE); 578 ipb->ipl_info.ccw.vm_parm_len = ip_len; 579 if (ip_len > 0) { 580 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID; 581 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len); 582 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len); 583 } else { 584 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID; 585 } 586 587 return len; 588 } 589 590 /* NSS wrapper */ 591 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj, 592 struct kobj_attribute *attr, char *page) 593 { 594 return reipl_generic_vmparm_show(reipl_block_nss, page); 595 } 596 597 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj, 598 struct kobj_attribute *attr, 599 const char *buf, size_t len) 600 { 601 return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len); 602 } 603 604 /* CCW wrapper */ 605 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj, 606 struct kobj_attribute *attr, char *page) 607 { 608 return reipl_generic_vmparm_show(reipl_block_ccw, page); 609 } 610 611 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj, 612 struct kobj_attribute *attr, 613 const char *buf, size_t len) 614 { 615 return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len); 616 } 617 618 static struct kobj_attribute sys_reipl_nss_vmparm_attr = 619 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show, 620 reipl_nss_vmparm_store); 621 static struct kobj_attribute sys_reipl_ccw_vmparm_attr = 622 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show, 623 reipl_ccw_vmparm_store); 624 625 /* FCP reipl device attributes */ 626 627 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n", 628 reipl_block_fcp->ipl_info.fcp.wwpn); 629 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n", 630 reipl_block_fcp->ipl_info.fcp.lun); 631 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n", 632 reipl_block_fcp->ipl_info.fcp.bootprog); 633 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n", 634 reipl_block_fcp->ipl_info.fcp.br_lba); 635 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n", 636 reipl_block_fcp->ipl_info.fcp.devno); 637 638 static struct attribute *reipl_fcp_attrs[] = { 639 &sys_reipl_fcp_device_attr.attr, 640 &sys_reipl_fcp_wwpn_attr.attr, 641 &sys_reipl_fcp_lun_attr.attr, 642 &sys_reipl_fcp_bootprog_attr.attr, 643 &sys_reipl_fcp_br_lba_attr.attr, 644 NULL, 645 }; 646 647 static struct attribute_group reipl_fcp_attr_group = { 648 .name = IPL_FCP_STR, 649 .attrs = reipl_fcp_attrs, 650 }; 651 652 /* CCW reipl device attributes */ 653 654 DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n", 655 reipl_block_ccw->ipl_info.ccw.devno); 656 657 static void reipl_get_ascii_loadparm(char *loadparm, 658 struct ipl_parameter_block *ibp) 659 { 660 memcpy(loadparm, ibp->ipl_info.ccw.load_parm, LOADPARM_LEN); 661 EBCASC(loadparm, LOADPARM_LEN); 662 loadparm[LOADPARM_LEN] = 0; 663 strstrip(loadparm); 664 } 665 666 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb, 667 char *page) 668 { 669 char buf[LOADPARM_LEN + 1]; 670 671 reipl_get_ascii_loadparm(buf, ipb); 672 return sprintf(page, "%s\n", buf); 673 } 674 675 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb, 676 const char *buf, size_t len) 677 { 678 int i, lp_len; 679 680 /* ignore trailing newline */ 681 lp_len = len; 682 if ((len > 0) && (buf[len - 1] == '\n')) 683 lp_len--; 684 /* loadparm can have max 8 characters and must not start with a blank */ 685 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' '))) 686 return -EINVAL; 687 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */ 688 for (i = 0; i < lp_len; i++) { 689 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') || 690 (buf[i] == '.')) 691 continue; 692 return -EINVAL; 693 } 694 /* initialize loadparm with blanks */ 695 memset(ipb->ipl_info.ccw.load_parm, ' ', LOADPARM_LEN); 696 /* copy and convert to ebcdic */ 697 memcpy(ipb->ipl_info.ccw.load_parm, buf, lp_len); 698 ASCEBC(ipb->ipl_info.ccw.load_parm, LOADPARM_LEN); 699 return len; 700 } 701 702 /* NSS wrapper */ 703 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj, 704 struct kobj_attribute *attr, char *page) 705 { 706 return reipl_generic_loadparm_show(reipl_block_nss, page); 707 } 708 709 static ssize_t reipl_nss_loadparm_store(struct kobject *kobj, 710 struct kobj_attribute *attr, 711 const char *buf, size_t len) 712 { 713 return reipl_generic_loadparm_store(reipl_block_nss, buf, len); 714 } 715 716 /* CCW wrapper */ 717 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj, 718 struct kobj_attribute *attr, char *page) 719 { 720 return reipl_generic_loadparm_show(reipl_block_ccw, page); 721 } 722 723 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj, 724 struct kobj_attribute *attr, 725 const char *buf, size_t len) 726 { 727 return reipl_generic_loadparm_store(reipl_block_ccw, buf, len); 728 } 729 730 static struct kobj_attribute sys_reipl_ccw_loadparm_attr = 731 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show, 732 reipl_ccw_loadparm_store); 733 734 static struct attribute *reipl_ccw_attrs_vm[] = { 735 &sys_reipl_ccw_device_attr.attr, 736 &sys_reipl_ccw_loadparm_attr.attr, 737 &sys_reipl_ccw_vmparm_attr.attr, 738 NULL, 739 }; 740 741 static struct attribute *reipl_ccw_attrs_lpar[] = { 742 &sys_reipl_ccw_device_attr.attr, 743 &sys_reipl_ccw_loadparm_attr.attr, 744 NULL, 745 }; 746 747 static struct attribute_group reipl_ccw_attr_group_vm = { 748 .name = IPL_CCW_STR, 749 .attrs = reipl_ccw_attrs_vm, 750 }; 751 752 static struct attribute_group reipl_ccw_attr_group_lpar = { 753 .name = IPL_CCW_STR, 754 .attrs = reipl_ccw_attrs_lpar, 755 }; 756 757 758 /* NSS reipl device attributes */ 759 static void reipl_get_ascii_nss_name(char *dst, 760 struct ipl_parameter_block *ipb) 761 { 762 memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE); 763 EBCASC(dst, NSS_NAME_SIZE); 764 dst[NSS_NAME_SIZE] = 0; 765 } 766 767 static ssize_t reipl_nss_name_show(struct kobject *kobj, 768 struct kobj_attribute *attr, char *page) 769 { 770 char nss_name[NSS_NAME_SIZE + 1] = {}; 771 772 reipl_get_ascii_nss_name(nss_name, reipl_block_nss); 773 return sprintf(page, "%s\n", nss_name); 774 } 775 776 static ssize_t reipl_nss_name_store(struct kobject *kobj, 777 struct kobj_attribute *attr, 778 const char *buf, size_t len) 779 { 780 int nss_len; 781 782 /* ignore trailing newline */ 783 nss_len = len; 784 if ((len > 0) && (buf[len - 1] == '\n')) 785 nss_len--; 786 787 if (nss_len > NSS_NAME_SIZE) 788 return -EINVAL; 789 790 memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE); 791 if (nss_len > 0) { 792 reipl_block_nss->ipl_info.ccw.vm_flags |= 793 DIAG308_VM_FLAGS_NSS_VALID; 794 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len); 795 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len); 796 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len); 797 } else { 798 reipl_block_nss->ipl_info.ccw.vm_flags &= 799 ~DIAG308_VM_FLAGS_NSS_VALID; 800 } 801 802 return len; 803 } 804 805 static struct kobj_attribute sys_reipl_nss_name_attr = 806 __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show, 807 reipl_nss_name_store); 808 809 static struct kobj_attribute sys_reipl_nss_loadparm_attr = 810 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show, 811 reipl_nss_loadparm_store); 812 813 static struct attribute *reipl_nss_attrs[] = { 814 &sys_reipl_nss_name_attr.attr, 815 &sys_reipl_nss_loadparm_attr.attr, 816 &sys_reipl_nss_vmparm_attr.attr, 817 NULL, 818 }; 819 820 static struct attribute_group reipl_nss_attr_group = { 821 .name = IPL_NSS_STR, 822 .attrs = reipl_nss_attrs, 823 }; 824 825 /* reipl type */ 826 827 static int reipl_set_type(enum ipl_type type) 828 { 829 if (!(reipl_capabilities & type)) 830 return -EINVAL; 831 832 switch(type) { 833 case IPL_TYPE_CCW: 834 if (diag308_set_works) 835 reipl_method = REIPL_METHOD_CCW_DIAG; 836 else if (MACHINE_IS_VM) 837 reipl_method = REIPL_METHOD_CCW_VM; 838 else 839 reipl_method = REIPL_METHOD_CCW_CIO; 840 reipl_block_actual = reipl_block_ccw; 841 break; 842 case IPL_TYPE_FCP: 843 if (diag308_set_works) 844 reipl_method = REIPL_METHOD_FCP_RW_DIAG; 845 else if (MACHINE_IS_VM) 846 reipl_method = REIPL_METHOD_FCP_RO_VM; 847 else 848 reipl_method = REIPL_METHOD_FCP_RO_DIAG; 849 reipl_block_actual = reipl_block_fcp; 850 break; 851 case IPL_TYPE_FCP_DUMP: 852 reipl_method = REIPL_METHOD_FCP_DUMP; 853 break; 854 case IPL_TYPE_NSS: 855 if (diag308_set_works) 856 reipl_method = REIPL_METHOD_NSS_DIAG; 857 else 858 reipl_method = REIPL_METHOD_NSS; 859 reipl_block_actual = reipl_block_nss; 860 break; 861 case IPL_TYPE_UNKNOWN: 862 reipl_method = REIPL_METHOD_DEFAULT; 863 break; 864 default: 865 BUG(); 866 } 867 reipl_type = type; 868 return 0; 869 } 870 871 static ssize_t reipl_type_show(struct kobject *kobj, 872 struct kobj_attribute *attr, char *page) 873 { 874 return sprintf(page, "%s\n", ipl_type_str(reipl_type)); 875 } 876 877 static ssize_t reipl_type_store(struct kobject *kobj, 878 struct kobj_attribute *attr, 879 const char *buf, size_t len) 880 { 881 int rc = -EINVAL; 882 883 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0) 884 rc = reipl_set_type(IPL_TYPE_CCW); 885 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0) 886 rc = reipl_set_type(IPL_TYPE_FCP); 887 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0) 888 rc = reipl_set_type(IPL_TYPE_NSS); 889 return (rc != 0) ? rc : len; 890 } 891 892 static struct kobj_attribute reipl_type_attr = 893 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store); 894 895 static struct kset *reipl_kset; 896 897 static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb, 898 const enum ipl_method m) 899 { 900 char loadparm[LOADPARM_LEN + 1] = {}; 901 char vmparm[DIAG308_VMPARM_SIZE + 1] = {}; 902 char nss_name[NSS_NAME_SIZE + 1] = {}; 903 size_t pos = 0; 904 905 reipl_get_ascii_loadparm(loadparm, ipb); 906 reipl_get_ascii_nss_name(nss_name, ipb); 907 reipl_get_ascii_vmparm(vmparm, ipb); 908 909 switch (m) { 910 case REIPL_METHOD_CCW_VM: 911 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno); 912 break; 913 case REIPL_METHOD_NSS: 914 pos = sprintf(dst, "IPL %s", nss_name); 915 break; 916 default: 917 break; 918 } 919 if (strlen(loadparm) > 0) 920 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm); 921 if (strlen(vmparm) > 0) 922 sprintf(dst + pos, " PARM %s", vmparm); 923 } 924 925 static void reipl_run(struct shutdown_trigger *trigger) 926 { 927 struct ccw_dev_id devid; 928 static char buf[128]; 929 930 switch (reipl_method) { 931 case REIPL_METHOD_CCW_CIO: 932 devid.devno = reipl_block_ccw->ipl_info.ccw.devno; 933 devid.ssid = 0; 934 reipl_ccw_dev(&devid); 935 break; 936 case REIPL_METHOD_CCW_VM: 937 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM); 938 __cpcmd(buf, NULL, 0, NULL); 939 break; 940 case REIPL_METHOD_CCW_DIAG: 941 diag308(DIAG308_SET, reipl_block_ccw); 942 diag308(DIAG308_IPL, NULL); 943 break; 944 case REIPL_METHOD_FCP_RW_DIAG: 945 diag308(DIAG308_SET, reipl_block_fcp); 946 diag308(DIAG308_IPL, NULL); 947 break; 948 case REIPL_METHOD_FCP_RO_DIAG: 949 diag308(DIAG308_IPL, NULL); 950 break; 951 case REIPL_METHOD_FCP_RO_VM: 952 __cpcmd("IPL", NULL, 0, NULL); 953 break; 954 case REIPL_METHOD_NSS_DIAG: 955 diag308(DIAG308_SET, reipl_block_nss); 956 diag308(DIAG308_IPL, NULL); 957 break; 958 case REIPL_METHOD_NSS: 959 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS); 960 __cpcmd(buf, NULL, 0, NULL); 961 break; 962 case REIPL_METHOD_DEFAULT: 963 if (MACHINE_IS_VM) 964 __cpcmd("IPL", NULL, 0, NULL); 965 diag308(DIAG308_IPL, NULL); 966 break; 967 case REIPL_METHOD_FCP_DUMP: 968 break; 969 } 970 disabled_wait((unsigned long) __builtin_return_address(0)); 971 } 972 973 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb) 974 { 975 ipb->hdr.len = IPL_PARM_BLK_CCW_LEN; 976 ipb->hdr.version = IPL_PARM_BLOCK_VERSION; 977 ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN; 978 ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW; 979 } 980 981 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb) 982 { 983 /* LOADPARM */ 984 /* check if read scp info worked and set loadparm */ 985 if (sclp_ipl_info.is_valid) 986 memcpy(ipb->ipl_info.ccw.load_parm, 987 &sclp_ipl_info.loadparm, LOADPARM_LEN); 988 else 989 /* read scp info failed: set empty loadparm (EBCDIC blanks) */ 990 memset(ipb->ipl_info.ccw.load_parm, 0x40, LOADPARM_LEN); 991 ipb->hdr.flags = DIAG308_FLAGS_LP_VALID; 992 993 /* VM PARM */ 994 if (MACHINE_IS_VM && diag308_set_works && 995 (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) { 996 997 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID; 998 ipb->ipl_info.ccw.vm_parm_len = 999 ipl_block.ipl_info.ccw.vm_parm_len; 1000 memcpy(ipb->ipl_info.ccw.vm_parm, 1001 ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE); 1002 } 1003 } 1004 1005 static int __init reipl_nss_init(void) 1006 { 1007 int rc; 1008 1009 if (!MACHINE_IS_VM) 1010 return 0; 1011 1012 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL); 1013 if (!reipl_block_nss) 1014 return -ENOMEM; 1015 1016 if (!diag308_set_works) 1017 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO; 1018 1019 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group); 1020 if (rc) 1021 return rc; 1022 1023 reipl_block_ccw_init(reipl_block_nss); 1024 if (ipl_info.type == IPL_TYPE_NSS) { 1025 memset(reipl_block_nss->ipl_info.ccw.nss_name, 1026 ' ', NSS_NAME_SIZE); 1027 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, 1028 kernel_nss_name, strlen(kernel_nss_name)); 1029 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE); 1030 reipl_block_nss->ipl_info.ccw.vm_flags |= 1031 DIAG308_VM_FLAGS_NSS_VALID; 1032 1033 reipl_block_ccw_fill_parms(reipl_block_nss); 1034 } 1035 1036 reipl_capabilities |= IPL_TYPE_NSS; 1037 return 0; 1038 } 1039 1040 static int __init reipl_ccw_init(void) 1041 { 1042 int rc; 1043 1044 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL); 1045 if (!reipl_block_ccw) 1046 return -ENOMEM; 1047 1048 if (MACHINE_IS_VM) { 1049 if (!diag308_set_works) 1050 sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO; 1051 rc = sysfs_create_group(&reipl_kset->kobj, 1052 &reipl_ccw_attr_group_vm); 1053 } else { 1054 if(!diag308_set_works) 1055 sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO; 1056 rc = sysfs_create_group(&reipl_kset->kobj, 1057 &reipl_ccw_attr_group_lpar); 1058 } 1059 if (rc) 1060 return rc; 1061 1062 reipl_block_ccw_init(reipl_block_ccw); 1063 if (ipl_info.type == IPL_TYPE_CCW) { 1064 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno; 1065 reipl_block_ccw_fill_parms(reipl_block_ccw); 1066 } 1067 1068 reipl_capabilities |= IPL_TYPE_CCW; 1069 return 0; 1070 } 1071 1072 static int __init reipl_fcp_init(void) 1073 { 1074 int rc; 1075 1076 if (!diag308_set_works) { 1077 if (ipl_info.type == IPL_TYPE_FCP) 1078 make_attrs_ro(reipl_fcp_attrs); 1079 else 1080 return 0; 1081 } 1082 1083 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL); 1084 if (!reipl_block_fcp) 1085 return -ENOMEM; 1086 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_fcp_attr_group); 1087 if (rc) { 1088 free_page((unsigned long)reipl_block_fcp); 1089 return rc; 1090 } 1091 if (ipl_info.type == IPL_TYPE_FCP) { 1092 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE); 1093 } else { 1094 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN; 1095 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION; 1096 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN; 1097 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP; 1098 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL; 1099 } 1100 reipl_capabilities |= IPL_TYPE_FCP; 1101 return 0; 1102 } 1103 1104 static int __init reipl_init(void) 1105 { 1106 int rc; 1107 1108 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj); 1109 if (!reipl_kset) 1110 return -ENOMEM; 1111 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr); 1112 if (rc) { 1113 kset_unregister(reipl_kset); 1114 return rc; 1115 } 1116 rc = reipl_ccw_init(); 1117 if (rc) 1118 return rc; 1119 rc = reipl_fcp_init(); 1120 if (rc) 1121 return rc; 1122 rc = reipl_nss_init(); 1123 if (rc) 1124 return rc; 1125 rc = reipl_set_type(ipl_info.type); 1126 if (rc) 1127 return rc; 1128 return 0; 1129 } 1130 1131 static struct shutdown_action __refdata reipl_action = { 1132 .name = SHUTDOWN_ACTION_REIPL_STR, 1133 .fn = reipl_run, 1134 .init = reipl_init, 1135 }; 1136 1137 /* 1138 * dump shutdown action: Dump Linux on shutdown. 1139 */ 1140 1141 /* FCP dump device attributes */ 1142 1143 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n", 1144 dump_block_fcp->ipl_info.fcp.wwpn); 1145 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n", 1146 dump_block_fcp->ipl_info.fcp.lun); 1147 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n", 1148 dump_block_fcp->ipl_info.fcp.bootprog); 1149 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n", 1150 dump_block_fcp->ipl_info.fcp.br_lba); 1151 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n", 1152 dump_block_fcp->ipl_info.fcp.devno); 1153 1154 static struct attribute *dump_fcp_attrs[] = { 1155 &sys_dump_fcp_device_attr.attr, 1156 &sys_dump_fcp_wwpn_attr.attr, 1157 &sys_dump_fcp_lun_attr.attr, 1158 &sys_dump_fcp_bootprog_attr.attr, 1159 &sys_dump_fcp_br_lba_attr.attr, 1160 NULL, 1161 }; 1162 1163 static struct attribute_group dump_fcp_attr_group = { 1164 .name = IPL_FCP_STR, 1165 .attrs = dump_fcp_attrs, 1166 }; 1167 1168 /* CCW dump device attributes */ 1169 1170 DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n", 1171 dump_block_ccw->ipl_info.ccw.devno); 1172 1173 static struct attribute *dump_ccw_attrs[] = { 1174 &sys_dump_ccw_device_attr.attr, 1175 NULL, 1176 }; 1177 1178 static struct attribute_group dump_ccw_attr_group = { 1179 .name = IPL_CCW_STR, 1180 .attrs = dump_ccw_attrs, 1181 }; 1182 1183 /* dump type */ 1184 1185 static int dump_set_type(enum dump_type type) 1186 { 1187 if (!(dump_capabilities & type)) 1188 return -EINVAL; 1189 switch (type) { 1190 case DUMP_TYPE_CCW: 1191 if (diag308_set_works) 1192 dump_method = DUMP_METHOD_CCW_DIAG; 1193 else if (MACHINE_IS_VM) 1194 dump_method = DUMP_METHOD_CCW_VM; 1195 else 1196 dump_method = DUMP_METHOD_CCW_CIO; 1197 break; 1198 case DUMP_TYPE_FCP: 1199 dump_method = DUMP_METHOD_FCP_DIAG; 1200 break; 1201 default: 1202 dump_method = DUMP_METHOD_NONE; 1203 } 1204 dump_type = type; 1205 return 0; 1206 } 1207 1208 static ssize_t dump_type_show(struct kobject *kobj, 1209 struct kobj_attribute *attr, char *page) 1210 { 1211 return sprintf(page, "%s\n", dump_type_str(dump_type)); 1212 } 1213 1214 static ssize_t dump_type_store(struct kobject *kobj, 1215 struct kobj_attribute *attr, 1216 const char *buf, size_t len) 1217 { 1218 int rc = -EINVAL; 1219 1220 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0) 1221 rc = dump_set_type(DUMP_TYPE_NONE); 1222 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0) 1223 rc = dump_set_type(DUMP_TYPE_CCW); 1224 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0) 1225 rc = dump_set_type(DUMP_TYPE_FCP); 1226 return (rc != 0) ? rc : len; 1227 } 1228 1229 static struct kobj_attribute dump_type_attr = 1230 __ATTR(dump_type, 0644, dump_type_show, dump_type_store); 1231 1232 static struct kset *dump_kset; 1233 1234 static void dump_run(struct shutdown_trigger *trigger) 1235 { 1236 struct ccw_dev_id devid; 1237 static char buf[100]; 1238 1239 switch (dump_method) { 1240 case DUMP_METHOD_CCW_CIO: 1241 smp_send_stop(); 1242 devid.devno = dump_block_ccw->ipl_info.ccw.devno; 1243 devid.ssid = 0; 1244 reipl_ccw_dev(&devid); 1245 break; 1246 case DUMP_METHOD_CCW_VM: 1247 smp_send_stop(); 1248 sprintf(buf, "STORE STATUS"); 1249 __cpcmd(buf, NULL, 0, NULL); 1250 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno); 1251 __cpcmd(buf, NULL, 0, NULL); 1252 break; 1253 case DUMP_METHOD_CCW_DIAG: 1254 diag308(DIAG308_SET, dump_block_ccw); 1255 diag308(DIAG308_DUMP, NULL); 1256 break; 1257 case DUMP_METHOD_FCP_DIAG: 1258 diag308(DIAG308_SET, dump_block_fcp); 1259 diag308(DIAG308_DUMP, NULL); 1260 break; 1261 case DUMP_METHOD_NONE: 1262 return; 1263 } 1264 printk(KERN_EMERG "Dump failed!\n"); 1265 } 1266 1267 static int __init dump_ccw_init(void) 1268 { 1269 int rc; 1270 1271 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL); 1272 if (!dump_block_ccw) 1273 return -ENOMEM; 1274 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group); 1275 if (rc) { 1276 free_page((unsigned long)dump_block_ccw); 1277 return rc; 1278 } 1279 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN; 1280 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION; 1281 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN; 1282 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW; 1283 dump_capabilities |= DUMP_TYPE_CCW; 1284 return 0; 1285 } 1286 1287 static int __init dump_fcp_init(void) 1288 { 1289 int rc; 1290 1291 if (!sclp_ipl_info.has_dump) 1292 return 0; /* LDIPL DUMP is not installed */ 1293 if (!diag308_set_works) 1294 return 0; 1295 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL); 1296 if (!dump_block_fcp) 1297 return -ENOMEM; 1298 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group); 1299 if (rc) { 1300 free_page((unsigned long)dump_block_fcp); 1301 return rc; 1302 } 1303 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN; 1304 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION; 1305 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN; 1306 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP; 1307 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP; 1308 dump_capabilities |= DUMP_TYPE_FCP; 1309 return 0; 1310 } 1311 1312 static int __init dump_init(void) 1313 { 1314 int rc; 1315 1316 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj); 1317 if (!dump_kset) 1318 return -ENOMEM; 1319 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr); 1320 if (rc) { 1321 kset_unregister(dump_kset); 1322 return rc; 1323 } 1324 rc = dump_ccw_init(); 1325 if (rc) 1326 return rc; 1327 rc = dump_fcp_init(); 1328 if (rc) 1329 return rc; 1330 dump_set_type(DUMP_TYPE_NONE); 1331 return 0; 1332 } 1333 1334 static struct shutdown_action __refdata dump_action = { 1335 .name = SHUTDOWN_ACTION_DUMP_STR, 1336 .fn = dump_run, 1337 .init = dump_init, 1338 }; 1339 1340 static void dump_reipl_run(struct shutdown_trigger *trigger) 1341 { 1342 preempt_disable(); 1343 /* 1344 * Bypass dynamic address translation (DAT) when storing IPL parameter 1345 * information block address and checksum into the prefix area 1346 * (corresponding to absolute addresses 0-8191). 1347 * When enhanced DAT applies and the STE format control in one, 1348 * the absolute address is formed without prefixing. In this case a 1349 * normal store (stg/st) into the prefix area would no more match to 1350 * absolute addresses 0-8191. 1351 */ 1352 #ifdef CONFIG_64BIT 1353 asm volatile("sturg %0,%1" 1354 :: "a" ((unsigned long) reipl_block_actual), 1355 "a" (&lowcore_ptr[smp_processor_id()]->ipib)); 1356 #else 1357 asm volatile("stura %0,%1" 1358 :: "a" ((unsigned long) reipl_block_actual), 1359 "a" (&lowcore_ptr[smp_processor_id()]->ipib)); 1360 #endif 1361 asm volatile("stura %0,%1" 1362 :: "a" (csum_partial(reipl_block_actual, 1363 reipl_block_actual->hdr.len, 0)), 1364 "a" (&lowcore_ptr[smp_processor_id()]->ipib_checksum)); 1365 preempt_enable(); 1366 dump_run(trigger); 1367 } 1368 1369 static int __init dump_reipl_init(void) 1370 { 1371 if (!diag308_set_works) 1372 return -EOPNOTSUPP; 1373 else 1374 return 0; 1375 } 1376 1377 static struct shutdown_action __refdata dump_reipl_action = { 1378 .name = SHUTDOWN_ACTION_DUMP_REIPL_STR, 1379 .fn = dump_reipl_run, 1380 .init = dump_reipl_init, 1381 }; 1382 1383 /* 1384 * vmcmd shutdown action: Trigger vm command on shutdown. 1385 */ 1386 1387 static char vmcmd_on_reboot[128]; 1388 static char vmcmd_on_panic[128]; 1389 static char vmcmd_on_halt[128]; 1390 static char vmcmd_on_poff[128]; 1391 1392 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot); 1393 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic); 1394 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt); 1395 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff); 1396 1397 static struct attribute *vmcmd_attrs[] = { 1398 &sys_vmcmd_on_reboot_attr.attr, 1399 &sys_vmcmd_on_panic_attr.attr, 1400 &sys_vmcmd_on_halt_attr.attr, 1401 &sys_vmcmd_on_poff_attr.attr, 1402 NULL, 1403 }; 1404 1405 static struct attribute_group vmcmd_attr_group = { 1406 .attrs = vmcmd_attrs, 1407 }; 1408 1409 static struct kset *vmcmd_kset; 1410 1411 static void vmcmd_run(struct shutdown_trigger *trigger) 1412 { 1413 char *cmd, *next_cmd; 1414 1415 if (strcmp(trigger->name, ON_REIPL_STR) == 0) 1416 cmd = vmcmd_on_reboot; 1417 else if (strcmp(trigger->name, ON_PANIC_STR) == 0) 1418 cmd = vmcmd_on_panic; 1419 else if (strcmp(trigger->name, ON_HALT_STR) == 0) 1420 cmd = vmcmd_on_halt; 1421 else if (strcmp(trigger->name, ON_POFF_STR) == 0) 1422 cmd = vmcmd_on_poff; 1423 else 1424 return; 1425 1426 if (strlen(cmd) == 0) 1427 return; 1428 do { 1429 next_cmd = strchr(cmd, '\n'); 1430 if (next_cmd) { 1431 next_cmd[0] = 0; 1432 next_cmd += 1; 1433 } 1434 __cpcmd(cmd, NULL, 0, NULL); 1435 cmd = next_cmd; 1436 } while (cmd != NULL); 1437 } 1438 1439 static int vmcmd_init(void) 1440 { 1441 if (!MACHINE_IS_VM) 1442 return -ENOTSUPP; 1443 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj); 1444 if (!vmcmd_kset) 1445 return -ENOMEM; 1446 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group); 1447 } 1448 1449 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR, 1450 vmcmd_run, vmcmd_init}; 1451 1452 /* 1453 * stop shutdown action: Stop Linux on shutdown. 1454 */ 1455 1456 static void stop_run(struct shutdown_trigger *trigger) 1457 { 1458 if (strcmp(trigger->name, ON_PANIC_STR) == 0) 1459 disabled_wait((unsigned long) __builtin_return_address(0)); 1460 else { 1461 signal_processor(smp_processor_id(), sigp_stop); 1462 for (;;); 1463 } 1464 } 1465 1466 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR, 1467 stop_run, NULL}; 1468 1469 /* action list */ 1470 1471 static struct shutdown_action *shutdown_actions_list[] = { 1472 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action, 1473 &vmcmd_action, &stop_action}; 1474 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *)) 1475 1476 /* 1477 * Trigger section 1478 */ 1479 1480 static struct kset *shutdown_actions_kset; 1481 1482 static int set_trigger(const char *buf, struct shutdown_trigger *trigger, 1483 size_t len) 1484 { 1485 int i; 1486 1487 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) { 1488 if (!shutdown_actions_list[i]) 1489 continue; 1490 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) { 1491 trigger->action = shutdown_actions_list[i]; 1492 return len; 1493 } 1494 } 1495 return -EINVAL; 1496 } 1497 1498 /* on reipl */ 1499 1500 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR, 1501 &reipl_action}; 1502 1503 static ssize_t on_reboot_show(struct kobject *kobj, 1504 struct kobj_attribute *attr, char *page) 1505 { 1506 return sprintf(page, "%s\n", on_reboot_trigger.action->name); 1507 } 1508 1509 static ssize_t on_reboot_store(struct kobject *kobj, 1510 struct kobj_attribute *attr, 1511 const char *buf, size_t len) 1512 { 1513 return set_trigger(buf, &on_reboot_trigger, len); 1514 } 1515 1516 static struct kobj_attribute on_reboot_attr = 1517 __ATTR(on_reboot, 0644, on_reboot_show, on_reboot_store); 1518 1519 static void do_machine_restart(char *__unused) 1520 { 1521 smp_send_stop(); 1522 on_reboot_trigger.action->fn(&on_reboot_trigger); 1523 reipl_run(NULL); 1524 } 1525 void (*_machine_restart)(char *command) = do_machine_restart; 1526 1527 /* on panic */ 1528 1529 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action}; 1530 1531 static ssize_t on_panic_show(struct kobject *kobj, 1532 struct kobj_attribute *attr, char *page) 1533 { 1534 return sprintf(page, "%s\n", on_panic_trigger.action->name); 1535 } 1536 1537 static ssize_t on_panic_store(struct kobject *kobj, 1538 struct kobj_attribute *attr, 1539 const char *buf, size_t len) 1540 { 1541 return set_trigger(buf, &on_panic_trigger, len); 1542 } 1543 1544 static struct kobj_attribute on_panic_attr = 1545 __ATTR(on_panic, 0644, on_panic_show, on_panic_store); 1546 1547 static void do_panic(void) 1548 { 1549 on_panic_trigger.action->fn(&on_panic_trigger); 1550 stop_run(&on_panic_trigger); 1551 } 1552 1553 /* on halt */ 1554 1555 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action}; 1556 1557 static ssize_t on_halt_show(struct kobject *kobj, 1558 struct kobj_attribute *attr, char *page) 1559 { 1560 return sprintf(page, "%s\n", on_halt_trigger.action->name); 1561 } 1562 1563 static ssize_t on_halt_store(struct kobject *kobj, 1564 struct kobj_attribute *attr, 1565 const char *buf, size_t len) 1566 { 1567 return set_trigger(buf, &on_halt_trigger, len); 1568 } 1569 1570 static struct kobj_attribute on_halt_attr = 1571 __ATTR(on_halt, 0644, on_halt_show, on_halt_store); 1572 1573 1574 static void do_machine_halt(void) 1575 { 1576 smp_send_stop(); 1577 on_halt_trigger.action->fn(&on_halt_trigger); 1578 stop_run(&on_halt_trigger); 1579 } 1580 void (*_machine_halt)(void) = do_machine_halt; 1581 1582 /* on power off */ 1583 1584 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action}; 1585 1586 static ssize_t on_poff_show(struct kobject *kobj, 1587 struct kobj_attribute *attr, char *page) 1588 { 1589 return sprintf(page, "%s\n", on_poff_trigger.action->name); 1590 } 1591 1592 static ssize_t on_poff_store(struct kobject *kobj, 1593 struct kobj_attribute *attr, 1594 const char *buf, size_t len) 1595 { 1596 return set_trigger(buf, &on_poff_trigger, len); 1597 } 1598 1599 static struct kobj_attribute on_poff_attr = 1600 __ATTR(on_poff, 0644, on_poff_show, on_poff_store); 1601 1602 1603 static void do_machine_power_off(void) 1604 { 1605 smp_send_stop(); 1606 on_poff_trigger.action->fn(&on_poff_trigger); 1607 stop_run(&on_poff_trigger); 1608 } 1609 void (*_machine_power_off)(void) = do_machine_power_off; 1610 1611 static void __init shutdown_triggers_init(void) 1612 { 1613 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL, 1614 firmware_kobj); 1615 if (!shutdown_actions_kset) 1616 goto fail; 1617 if (sysfs_create_file(&shutdown_actions_kset->kobj, 1618 &on_reboot_attr.attr)) 1619 goto fail; 1620 if (sysfs_create_file(&shutdown_actions_kset->kobj, 1621 &on_panic_attr.attr)) 1622 goto fail; 1623 if (sysfs_create_file(&shutdown_actions_kset->kobj, 1624 &on_halt_attr.attr)) 1625 goto fail; 1626 if (sysfs_create_file(&shutdown_actions_kset->kobj, 1627 &on_poff_attr.attr)) 1628 goto fail; 1629 1630 return; 1631 fail: 1632 panic("shutdown_triggers_init failed\n"); 1633 } 1634 1635 static void __init shutdown_actions_init(void) 1636 { 1637 int i; 1638 1639 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) { 1640 if (!shutdown_actions_list[i]->init) 1641 continue; 1642 if (shutdown_actions_list[i]->init()) 1643 shutdown_actions_list[i] = NULL; 1644 } 1645 } 1646 1647 static int __init s390_ipl_init(void) 1648 { 1649 sclp_get_ipl_info(&sclp_ipl_info); 1650 shutdown_actions_init(); 1651 shutdown_triggers_init(); 1652 return 0; 1653 } 1654 1655 __initcall(s390_ipl_init); 1656 1657 static void __init strncpy_skip_quote(char *dst, char *src, int n) 1658 { 1659 int sx, dx; 1660 1661 dx = 0; 1662 for (sx = 0; src[sx] != 0; sx++) { 1663 if (src[sx] == '"') 1664 continue; 1665 dst[dx++] = src[sx]; 1666 if (dx >= n) 1667 break; 1668 } 1669 } 1670 1671 static int __init vmcmd_on_reboot_setup(char *str) 1672 { 1673 if (!MACHINE_IS_VM) 1674 return 1; 1675 strncpy_skip_quote(vmcmd_on_reboot, str, 127); 1676 vmcmd_on_reboot[127] = 0; 1677 on_reboot_trigger.action = &vmcmd_action; 1678 return 1; 1679 } 1680 __setup("vmreboot=", vmcmd_on_reboot_setup); 1681 1682 static int __init vmcmd_on_panic_setup(char *str) 1683 { 1684 if (!MACHINE_IS_VM) 1685 return 1; 1686 strncpy_skip_quote(vmcmd_on_panic, str, 127); 1687 vmcmd_on_panic[127] = 0; 1688 on_panic_trigger.action = &vmcmd_action; 1689 return 1; 1690 } 1691 __setup("vmpanic=", vmcmd_on_panic_setup); 1692 1693 static int __init vmcmd_on_halt_setup(char *str) 1694 { 1695 if (!MACHINE_IS_VM) 1696 return 1; 1697 strncpy_skip_quote(vmcmd_on_halt, str, 127); 1698 vmcmd_on_halt[127] = 0; 1699 on_halt_trigger.action = &vmcmd_action; 1700 return 1; 1701 } 1702 __setup("vmhalt=", vmcmd_on_halt_setup); 1703 1704 static int __init vmcmd_on_poff_setup(char *str) 1705 { 1706 if (!MACHINE_IS_VM) 1707 return 1; 1708 strncpy_skip_quote(vmcmd_on_poff, str, 127); 1709 vmcmd_on_poff[127] = 0; 1710 on_poff_trigger.action = &vmcmd_action; 1711 return 1; 1712 } 1713 __setup("vmpoff=", vmcmd_on_poff_setup); 1714 1715 static int on_panic_notify(struct notifier_block *self, 1716 unsigned long event, void *data) 1717 { 1718 do_panic(); 1719 return NOTIFY_OK; 1720 } 1721 1722 static struct notifier_block on_panic_nb = { 1723 .notifier_call = on_panic_notify, 1724 .priority = INT_MIN, 1725 }; 1726 1727 void __init setup_ipl(void) 1728 { 1729 ipl_info.type = get_ipl_type(); 1730 switch (ipl_info.type) { 1731 case IPL_TYPE_CCW: 1732 ipl_info.data.ccw.dev_id.devno = ipl_devno; 1733 ipl_info.data.ccw.dev_id.ssid = 0; 1734 break; 1735 case IPL_TYPE_FCP: 1736 case IPL_TYPE_FCP_DUMP: 1737 ipl_info.data.fcp.dev_id.devno = 1738 IPL_PARMBLOCK_START->ipl_info.fcp.devno; 1739 ipl_info.data.fcp.dev_id.ssid = 0; 1740 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn; 1741 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun; 1742 break; 1743 case IPL_TYPE_NSS: 1744 strncpy(ipl_info.data.nss.name, kernel_nss_name, 1745 sizeof(ipl_info.data.nss.name)); 1746 break; 1747 case IPL_TYPE_UNKNOWN: 1748 /* We have no info to copy */ 1749 break; 1750 } 1751 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb); 1752 } 1753 1754 void __init ipl_update_parameters(void) 1755 { 1756 int rc; 1757 1758 rc = diag308(DIAG308_STORE, &ipl_block); 1759 if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG)) 1760 diag308_set_works = 1; 1761 } 1762 1763 void __init ipl_save_parameters(void) 1764 { 1765 struct cio_iplinfo iplinfo; 1766 unsigned int *ipl_ptr; 1767 void *src, *dst; 1768 1769 if (cio_get_iplinfo(&iplinfo)) 1770 return; 1771 1772 ipl_devno = iplinfo.devno; 1773 ipl_flags |= IPL_DEVNO_VALID; 1774 if (!iplinfo.is_qdio) 1775 return; 1776 ipl_flags |= IPL_PARMBLOCK_VALID; 1777 ipl_ptr = (unsigned int *)__LC_IPL_PARMBLOCK_PTR; 1778 src = (void *)(unsigned long)*ipl_ptr; 1779 dst = (void *)IPL_PARMBLOCK_ORIGIN; 1780 memmove(dst, src, PAGE_SIZE); 1781 *ipl_ptr = IPL_PARMBLOCK_ORIGIN; 1782 } 1783 1784 static LIST_HEAD(rcall); 1785 static DEFINE_MUTEX(rcall_mutex); 1786 1787 void register_reset_call(struct reset_call *reset) 1788 { 1789 mutex_lock(&rcall_mutex); 1790 list_add(&reset->list, &rcall); 1791 mutex_unlock(&rcall_mutex); 1792 } 1793 EXPORT_SYMBOL_GPL(register_reset_call); 1794 1795 void unregister_reset_call(struct reset_call *reset) 1796 { 1797 mutex_lock(&rcall_mutex); 1798 list_del(&reset->list); 1799 mutex_unlock(&rcall_mutex); 1800 } 1801 EXPORT_SYMBOL_GPL(unregister_reset_call); 1802 1803 static void do_reset_calls(void) 1804 { 1805 struct reset_call *reset; 1806 1807 list_for_each_entry(reset, &rcall, list) 1808 reset->fn(); 1809 } 1810 1811 u32 dump_prefix_page; 1812 1813 void s390_reset_system(void) 1814 { 1815 struct _lowcore *lc; 1816 1817 lc = (struct _lowcore *)(unsigned long) store_prefix(); 1818 1819 /* Stack for interrupt/machine check handler */ 1820 lc->panic_stack = S390_lowcore.panic_stack; 1821 1822 /* Save prefix page address for dump case */ 1823 dump_prefix_page = (u32)(unsigned long) lc; 1824 1825 /* Disable prefixing */ 1826 set_prefix(0); 1827 1828 /* Disable lowcore protection */ 1829 __ctl_clear_bit(0,28); 1830 1831 /* Set new machine check handler */ 1832 S390_lowcore.mcck_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK; 1833 S390_lowcore.mcck_new_psw.addr = 1834 PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler; 1835 1836 /* Set new program check handler */ 1837 S390_lowcore.program_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK; 1838 S390_lowcore.program_new_psw.addr = 1839 PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler; 1840 1841 do_reset_calls(); 1842 } 1843 1844