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/sigp.h> 27 #include <asm/checksum.h> 28 29 #define IPL_PARM_BLOCK_VERSION 0 30 31 #define IPL_UNKNOWN_STR "unknown" 32 #define IPL_CCW_STR "ccw" 33 #define IPL_FCP_STR "fcp" 34 #define IPL_FCP_DUMP_STR "fcp_dump" 35 #define IPL_NSS_STR "nss" 36 37 #define DUMP_CCW_STR "ccw" 38 #define DUMP_FCP_STR "fcp" 39 #define DUMP_NONE_STR "none" 40 41 /* 42 * Four shutdown trigger types are supported: 43 * - panic 44 * - halt 45 * - power off 46 * - reipl 47 */ 48 #define ON_PANIC_STR "on_panic" 49 #define ON_HALT_STR "on_halt" 50 #define ON_POFF_STR "on_poff" 51 #define ON_REIPL_STR "on_reboot" 52 53 struct shutdown_action; 54 struct shutdown_trigger { 55 char *name; 56 struct shutdown_action *action; 57 }; 58 59 /* 60 * The following shutdown action types are supported: 61 */ 62 #define SHUTDOWN_ACTION_IPL_STR "ipl" 63 #define SHUTDOWN_ACTION_REIPL_STR "reipl" 64 #define SHUTDOWN_ACTION_DUMP_STR "dump" 65 #define SHUTDOWN_ACTION_VMCMD_STR "vmcmd" 66 #define SHUTDOWN_ACTION_STOP_STR "stop" 67 #define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl" 68 69 struct shutdown_action { 70 char *name; 71 void (*fn) (struct shutdown_trigger *trigger); 72 int (*init) (void); 73 int init_rc; 74 }; 75 76 static char *ipl_type_str(enum ipl_type type) 77 { 78 switch (type) { 79 case IPL_TYPE_CCW: 80 return IPL_CCW_STR; 81 case IPL_TYPE_FCP: 82 return IPL_FCP_STR; 83 case IPL_TYPE_FCP_DUMP: 84 return IPL_FCP_DUMP_STR; 85 case IPL_TYPE_NSS: 86 return IPL_NSS_STR; 87 case IPL_TYPE_UNKNOWN: 88 default: 89 return IPL_UNKNOWN_STR; 90 } 91 } 92 93 enum dump_type { 94 DUMP_TYPE_NONE = 1, 95 DUMP_TYPE_CCW = 2, 96 DUMP_TYPE_FCP = 4, 97 }; 98 99 static char *dump_type_str(enum dump_type type) 100 { 101 switch (type) { 102 case DUMP_TYPE_NONE: 103 return DUMP_NONE_STR; 104 case DUMP_TYPE_CCW: 105 return DUMP_CCW_STR; 106 case DUMP_TYPE_FCP: 107 return DUMP_FCP_STR; 108 default: 109 return NULL; 110 } 111 } 112 113 /* 114 * Must be in data section since the bss section 115 * is not cleared when these are accessed. 116 */ 117 static u16 ipl_devno __attribute__((__section__(".data"))) = 0; 118 u32 ipl_flags __attribute__((__section__(".data"))) = 0; 119 120 enum ipl_method { 121 REIPL_METHOD_CCW_CIO, 122 REIPL_METHOD_CCW_DIAG, 123 REIPL_METHOD_CCW_VM, 124 REIPL_METHOD_FCP_RO_DIAG, 125 REIPL_METHOD_FCP_RW_DIAG, 126 REIPL_METHOD_FCP_RO_VM, 127 REIPL_METHOD_FCP_DUMP, 128 REIPL_METHOD_NSS, 129 REIPL_METHOD_NSS_DIAG, 130 REIPL_METHOD_DEFAULT, 131 }; 132 133 enum dump_method { 134 DUMP_METHOD_NONE, 135 DUMP_METHOD_CCW_CIO, 136 DUMP_METHOD_CCW_DIAG, 137 DUMP_METHOD_CCW_VM, 138 DUMP_METHOD_FCP_DIAG, 139 }; 140 141 static int diag308_set_works = 0; 142 143 static struct ipl_parameter_block ipl_block; 144 145 static int reipl_capabilities = IPL_TYPE_UNKNOWN; 146 147 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN; 148 static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT; 149 static struct ipl_parameter_block *reipl_block_fcp; 150 static struct ipl_parameter_block *reipl_block_ccw; 151 static struct ipl_parameter_block *reipl_block_nss; 152 static struct ipl_parameter_block *reipl_block_actual; 153 154 static int dump_capabilities = DUMP_TYPE_NONE; 155 static enum dump_type dump_type = DUMP_TYPE_NONE; 156 static enum dump_method dump_method = DUMP_METHOD_NONE; 157 static struct ipl_parameter_block *dump_block_fcp; 158 static struct ipl_parameter_block *dump_block_ccw; 159 160 static struct sclp_ipl_info sclp_ipl_info; 161 162 int diag308(unsigned long subcode, void *addr) 163 { 164 register unsigned long _addr asm("0") = (unsigned long) addr; 165 register unsigned long _rc asm("1") = 0; 166 167 asm volatile( 168 " diag %0,%2,0x308\n" 169 "0:\n" 170 EX_TABLE(0b,0b) 171 : "+d" (_addr), "+d" (_rc) 172 : "d" (subcode) : "cc", "memory"); 173 return _rc; 174 } 175 EXPORT_SYMBOL_GPL(diag308); 176 177 /* SYSFS */ 178 179 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \ 180 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \ 181 struct kobj_attribute *attr, \ 182 char *page) \ 183 { \ 184 return sprintf(page, _format, _value); \ 185 } \ 186 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ 187 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL); 188 189 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \ 190 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \ 191 struct kobj_attribute *attr, \ 192 char *page) \ 193 { \ 194 return sprintf(page, _fmt_out, \ 195 (unsigned long long) _value); \ 196 } \ 197 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \ 198 struct kobj_attribute *attr, \ 199 const char *buf, size_t len) \ 200 { \ 201 unsigned long long value; \ 202 if (sscanf(buf, _fmt_in, &value) != 1) \ 203 return -EINVAL; \ 204 _value = value; \ 205 return len; \ 206 } \ 207 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ 208 __ATTR(_name,(S_IRUGO | S_IWUSR), \ 209 sys_##_prefix##_##_name##_show, \ 210 sys_##_prefix##_##_name##_store); 211 212 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\ 213 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \ 214 struct kobj_attribute *attr, \ 215 char *page) \ 216 { \ 217 return sprintf(page, _fmt_out, _value); \ 218 } \ 219 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \ 220 struct kobj_attribute *attr, \ 221 const char *buf, size_t len) \ 222 { \ 223 strncpy(_value, buf, sizeof(_value) - 1); \ 224 strstrip(_value); \ 225 return len; \ 226 } \ 227 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ 228 __ATTR(_name,(S_IRUGO | S_IWUSR), \ 229 sys_##_prefix##_##_name##_show, \ 230 sys_##_prefix##_##_name##_store); 231 232 static void make_attrs_ro(struct attribute **attrs) 233 { 234 while (*attrs) { 235 (*attrs)->mode = S_IRUGO; 236 attrs++; 237 } 238 } 239 240 /* 241 * ipl section 242 */ 243 244 static __init enum ipl_type get_ipl_type(void) 245 { 246 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START; 247 248 if (ipl_flags & IPL_NSS_VALID) 249 return IPL_TYPE_NSS; 250 if (!(ipl_flags & IPL_DEVNO_VALID)) 251 return IPL_TYPE_UNKNOWN; 252 if (!(ipl_flags & IPL_PARMBLOCK_VALID)) 253 return IPL_TYPE_CCW; 254 if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION) 255 return IPL_TYPE_UNKNOWN; 256 if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP) 257 return IPL_TYPE_UNKNOWN; 258 if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP) 259 return IPL_TYPE_FCP_DUMP; 260 return IPL_TYPE_FCP; 261 } 262 263 struct ipl_info ipl_info; 264 EXPORT_SYMBOL_GPL(ipl_info); 265 266 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr, 267 char *page) 268 { 269 return sprintf(page, "%s\n", ipl_type_str(ipl_info.type)); 270 } 271 272 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type); 273 274 /* VM IPL PARM routines */ 275 static void reipl_get_ascii_vmparm(char *dest, 276 const struct ipl_parameter_block *ipb) 277 { 278 int i; 279 int len = 0; 280 char has_lowercase = 0; 281 282 if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) && 283 (ipb->ipl_info.ccw.vm_parm_len > 0)) { 284 285 len = ipb->ipl_info.ccw.vm_parm_len; 286 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len); 287 /* If at least one character is lowercase, we assume mixed 288 * case; otherwise we convert everything to lowercase. 289 */ 290 for (i = 0; i < len; i++) 291 if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */ 292 (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */ 293 (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */ 294 has_lowercase = 1; 295 break; 296 } 297 if (!has_lowercase) 298 EBC_TOLOWER(dest, len); 299 EBCASC(dest, len); 300 } 301 dest[len] = 0; 302 } 303 304 void get_ipl_vmparm(char *dest) 305 { 306 if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW)) 307 reipl_get_ascii_vmparm(dest, &ipl_block); 308 else 309 dest[0] = 0; 310 } 311 312 static ssize_t ipl_vm_parm_show(struct kobject *kobj, 313 struct kobj_attribute *attr, char *page) 314 { 315 char parm[DIAG308_VMPARM_SIZE + 1] = {}; 316 317 get_ipl_vmparm(parm); 318 return sprintf(page, "%s\n", parm); 319 } 320 321 static struct kobj_attribute sys_ipl_vm_parm_attr = 322 __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL); 323 324 static ssize_t sys_ipl_device_show(struct kobject *kobj, 325 struct kobj_attribute *attr, char *page) 326 { 327 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START; 328 329 switch (ipl_info.type) { 330 case IPL_TYPE_CCW: 331 return sprintf(page, "0.0.%04x\n", ipl_devno); 332 case IPL_TYPE_FCP: 333 case IPL_TYPE_FCP_DUMP: 334 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno); 335 default: 336 return 0; 337 } 338 } 339 340 static struct kobj_attribute sys_ipl_device_attr = 341 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL); 342 343 static ssize_t ipl_parameter_read(struct kobject *kobj, struct bin_attribute *attr, 344 char *buf, loff_t off, size_t count) 345 { 346 return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START, 347 IPL_PARMBLOCK_SIZE); 348 } 349 350 static struct bin_attribute ipl_parameter_attr = { 351 .attr = { 352 .name = "binary_parameter", 353 .mode = S_IRUGO, 354 }, 355 .size = PAGE_SIZE, 356 .read = &ipl_parameter_read, 357 }; 358 359 static ssize_t ipl_scp_data_read(struct kobject *kobj, struct bin_attribute *attr, 360 char *buf, loff_t off, size_t count) 361 { 362 unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len; 363 void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data; 364 365 return memory_read_from_buffer(buf, count, &off, scp_data, size); 366 } 367 368 static struct bin_attribute ipl_scp_data_attr = { 369 .attr = { 370 .name = "scp_data", 371 .mode = S_IRUGO, 372 }, 373 .size = PAGE_SIZE, 374 .read = ipl_scp_data_read, 375 }; 376 377 /* FCP ipl device attributes */ 378 379 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long) 380 IPL_PARMBLOCK_START->ipl_info.fcp.wwpn); 381 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long) 382 IPL_PARMBLOCK_START->ipl_info.fcp.lun); 383 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long) 384 IPL_PARMBLOCK_START->ipl_info.fcp.bootprog); 385 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long) 386 IPL_PARMBLOCK_START->ipl_info.fcp.br_lba); 387 388 static struct attribute *ipl_fcp_attrs[] = { 389 &sys_ipl_type_attr.attr, 390 &sys_ipl_device_attr.attr, 391 &sys_ipl_fcp_wwpn_attr.attr, 392 &sys_ipl_fcp_lun_attr.attr, 393 &sys_ipl_fcp_bootprog_attr.attr, 394 &sys_ipl_fcp_br_lba_attr.attr, 395 NULL, 396 }; 397 398 static struct attribute_group ipl_fcp_attr_group = { 399 .attrs = ipl_fcp_attrs, 400 }; 401 402 /* CCW ipl device attributes */ 403 404 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj, 405 struct kobj_attribute *attr, char *page) 406 { 407 char loadparm[LOADPARM_LEN + 1] = {}; 408 409 if (!sclp_ipl_info.is_valid) 410 return sprintf(page, "#unknown#\n"); 411 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN); 412 EBCASC(loadparm, LOADPARM_LEN); 413 strstrip(loadparm); 414 return sprintf(page, "%s\n", loadparm); 415 } 416 417 static struct kobj_attribute sys_ipl_ccw_loadparm_attr = 418 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL); 419 420 static struct attribute *ipl_ccw_attrs_vm[] = { 421 &sys_ipl_type_attr.attr, 422 &sys_ipl_device_attr.attr, 423 &sys_ipl_ccw_loadparm_attr.attr, 424 &sys_ipl_vm_parm_attr.attr, 425 NULL, 426 }; 427 428 static struct attribute *ipl_ccw_attrs_lpar[] = { 429 &sys_ipl_type_attr.attr, 430 &sys_ipl_device_attr.attr, 431 &sys_ipl_ccw_loadparm_attr.attr, 432 NULL, 433 }; 434 435 static struct attribute_group ipl_ccw_attr_group_vm = { 436 .attrs = ipl_ccw_attrs_vm, 437 }; 438 439 static struct attribute_group ipl_ccw_attr_group_lpar = { 440 .attrs = ipl_ccw_attrs_lpar 441 }; 442 443 /* NSS ipl device attributes */ 444 445 DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name); 446 447 static struct attribute *ipl_nss_attrs[] = { 448 &sys_ipl_type_attr.attr, 449 &sys_ipl_nss_name_attr.attr, 450 &sys_ipl_ccw_loadparm_attr.attr, 451 &sys_ipl_vm_parm_attr.attr, 452 NULL, 453 }; 454 455 static struct attribute_group ipl_nss_attr_group = { 456 .attrs = ipl_nss_attrs, 457 }; 458 459 /* UNKNOWN ipl device attributes */ 460 461 static struct attribute *ipl_unknown_attrs[] = { 462 &sys_ipl_type_attr.attr, 463 NULL, 464 }; 465 466 static struct attribute_group ipl_unknown_attr_group = { 467 .attrs = ipl_unknown_attrs, 468 }; 469 470 static struct kset *ipl_kset; 471 472 static int __init ipl_register_fcp_files(void) 473 { 474 int rc; 475 476 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group); 477 if (rc) 478 goto out; 479 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_parameter_attr); 480 if (rc) 481 goto out_ipl_parm; 482 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_scp_data_attr); 483 if (!rc) 484 goto out; 485 486 sysfs_remove_bin_file(&ipl_kset->kobj, &ipl_parameter_attr); 487 488 out_ipl_parm: 489 sysfs_remove_group(&ipl_kset->kobj, &ipl_fcp_attr_group); 490 out: 491 return rc; 492 } 493 494 static void ipl_run(struct shutdown_trigger *trigger) 495 { 496 diag308(DIAG308_IPL, NULL); 497 if (MACHINE_IS_VM) 498 __cpcmd("IPL", NULL, 0, NULL); 499 else if (ipl_info.type == IPL_TYPE_CCW) 500 reipl_ccw_dev(&ipl_info.data.ccw.dev_id); 501 } 502 503 static int __init ipl_init(void) 504 { 505 int rc; 506 507 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj); 508 if (!ipl_kset) { 509 rc = -ENOMEM; 510 goto out; 511 } 512 switch (ipl_info.type) { 513 case IPL_TYPE_CCW: 514 if (MACHINE_IS_VM) 515 rc = sysfs_create_group(&ipl_kset->kobj, 516 &ipl_ccw_attr_group_vm); 517 else 518 rc = sysfs_create_group(&ipl_kset->kobj, 519 &ipl_ccw_attr_group_lpar); 520 break; 521 case IPL_TYPE_FCP: 522 case IPL_TYPE_FCP_DUMP: 523 rc = ipl_register_fcp_files(); 524 break; 525 case IPL_TYPE_NSS: 526 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group); 527 break; 528 default: 529 rc = sysfs_create_group(&ipl_kset->kobj, 530 &ipl_unknown_attr_group); 531 break; 532 } 533 out: 534 if (rc) 535 panic("ipl_init failed: rc = %i\n", rc); 536 537 return 0; 538 } 539 540 static struct shutdown_action __refdata ipl_action = { 541 .name = SHUTDOWN_ACTION_IPL_STR, 542 .fn = ipl_run, 543 .init = ipl_init, 544 }; 545 546 /* 547 * reipl shutdown action: Reboot Linux on shutdown. 548 */ 549 550 /* VM IPL PARM attributes */ 551 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb, 552 char *page) 553 { 554 char vmparm[DIAG308_VMPARM_SIZE + 1] = {}; 555 556 reipl_get_ascii_vmparm(vmparm, ipb); 557 return sprintf(page, "%s\n", vmparm); 558 } 559 560 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb, 561 size_t vmparm_max, 562 const char *buf, size_t len) 563 { 564 int i, ip_len; 565 566 /* ignore trailing newline */ 567 ip_len = len; 568 if ((len > 0) && (buf[len - 1] == '\n')) 569 ip_len--; 570 571 if (ip_len > vmparm_max) 572 return -EINVAL; 573 574 /* parm is used to store kernel options, check for common chars */ 575 for (i = 0; i < ip_len; i++) 576 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i]))) 577 return -EINVAL; 578 579 memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE); 580 ipb->ipl_info.ccw.vm_parm_len = ip_len; 581 if (ip_len > 0) { 582 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID; 583 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len); 584 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len); 585 } else { 586 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID; 587 } 588 589 return len; 590 } 591 592 /* NSS wrapper */ 593 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj, 594 struct kobj_attribute *attr, char *page) 595 { 596 return reipl_generic_vmparm_show(reipl_block_nss, page); 597 } 598 599 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj, 600 struct kobj_attribute *attr, 601 const char *buf, size_t len) 602 { 603 return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len); 604 } 605 606 /* CCW wrapper */ 607 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj, 608 struct kobj_attribute *attr, char *page) 609 { 610 return reipl_generic_vmparm_show(reipl_block_ccw, page); 611 } 612 613 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj, 614 struct kobj_attribute *attr, 615 const char *buf, size_t len) 616 { 617 return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len); 618 } 619 620 static struct kobj_attribute sys_reipl_nss_vmparm_attr = 621 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show, 622 reipl_nss_vmparm_store); 623 static struct kobj_attribute sys_reipl_ccw_vmparm_attr = 624 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show, 625 reipl_ccw_vmparm_store); 626 627 /* FCP reipl device attributes */ 628 629 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n", 630 reipl_block_fcp->ipl_info.fcp.wwpn); 631 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n", 632 reipl_block_fcp->ipl_info.fcp.lun); 633 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n", 634 reipl_block_fcp->ipl_info.fcp.bootprog); 635 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n", 636 reipl_block_fcp->ipl_info.fcp.br_lba); 637 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n", 638 reipl_block_fcp->ipl_info.fcp.devno); 639 640 static struct attribute *reipl_fcp_attrs[] = { 641 &sys_reipl_fcp_device_attr.attr, 642 &sys_reipl_fcp_wwpn_attr.attr, 643 &sys_reipl_fcp_lun_attr.attr, 644 &sys_reipl_fcp_bootprog_attr.attr, 645 &sys_reipl_fcp_br_lba_attr.attr, 646 NULL, 647 }; 648 649 static struct attribute_group reipl_fcp_attr_group = { 650 .name = IPL_FCP_STR, 651 .attrs = reipl_fcp_attrs, 652 }; 653 654 /* CCW reipl device attributes */ 655 656 DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n", 657 reipl_block_ccw->ipl_info.ccw.devno); 658 659 static void reipl_get_ascii_loadparm(char *loadparm, 660 struct ipl_parameter_block *ibp) 661 { 662 memcpy(loadparm, ibp->ipl_info.ccw.load_parm, LOADPARM_LEN); 663 EBCASC(loadparm, LOADPARM_LEN); 664 loadparm[LOADPARM_LEN] = 0; 665 strstrip(loadparm); 666 } 667 668 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb, 669 char *page) 670 { 671 char buf[LOADPARM_LEN + 1]; 672 673 reipl_get_ascii_loadparm(buf, ipb); 674 return sprintf(page, "%s\n", buf); 675 } 676 677 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb, 678 const char *buf, size_t len) 679 { 680 int i, lp_len; 681 682 /* ignore trailing newline */ 683 lp_len = len; 684 if ((len > 0) && (buf[len - 1] == '\n')) 685 lp_len--; 686 /* loadparm can have max 8 characters and must not start with a blank */ 687 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' '))) 688 return -EINVAL; 689 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */ 690 for (i = 0; i < lp_len; i++) { 691 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') || 692 (buf[i] == '.')) 693 continue; 694 return -EINVAL; 695 } 696 /* initialize loadparm with blanks */ 697 memset(ipb->ipl_info.ccw.load_parm, ' ', LOADPARM_LEN); 698 /* copy and convert to ebcdic */ 699 memcpy(ipb->ipl_info.ccw.load_parm, buf, lp_len); 700 ASCEBC(ipb->ipl_info.ccw.load_parm, LOADPARM_LEN); 701 return len; 702 } 703 704 /* NSS wrapper */ 705 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj, 706 struct kobj_attribute *attr, char *page) 707 { 708 return reipl_generic_loadparm_show(reipl_block_nss, page); 709 } 710 711 static ssize_t reipl_nss_loadparm_store(struct kobject *kobj, 712 struct kobj_attribute *attr, 713 const char *buf, size_t len) 714 { 715 return reipl_generic_loadparm_store(reipl_block_nss, buf, len); 716 } 717 718 /* CCW wrapper */ 719 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj, 720 struct kobj_attribute *attr, char *page) 721 { 722 return reipl_generic_loadparm_show(reipl_block_ccw, page); 723 } 724 725 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj, 726 struct kobj_attribute *attr, 727 const char *buf, size_t len) 728 { 729 return reipl_generic_loadparm_store(reipl_block_ccw, buf, len); 730 } 731 732 static struct kobj_attribute sys_reipl_ccw_loadparm_attr = 733 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show, 734 reipl_ccw_loadparm_store); 735 736 static struct attribute *reipl_ccw_attrs_vm[] = { 737 &sys_reipl_ccw_device_attr.attr, 738 &sys_reipl_ccw_loadparm_attr.attr, 739 &sys_reipl_ccw_vmparm_attr.attr, 740 NULL, 741 }; 742 743 static struct attribute *reipl_ccw_attrs_lpar[] = { 744 &sys_reipl_ccw_device_attr.attr, 745 &sys_reipl_ccw_loadparm_attr.attr, 746 NULL, 747 }; 748 749 static struct attribute_group reipl_ccw_attr_group_vm = { 750 .name = IPL_CCW_STR, 751 .attrs = reipl_ccw_attrs_vm, 752 }; 753 754 static struct attribute_group reipl_ccw_attr_group_lpar = { 755 .name = IPL_CCW_STR, 756 .attrs = reipl_ccw_attrs_lpar, 757 }; 758 759 760 /* NSS reipl device attributes */ 761 static void reipl_get_ascii_nss_name(char *dst, 762 struct ipl_parameter_block *ipb) 763 { 764 memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE); 765 EBCASC(dst, NSS_NAME_SIZE); 766 dst[NSS_NAME_SIZE] = 0; 767 } 768 769 static ssize_t reipl_nss_name_show(struct kobject *kobj, 770 struct kobj_attribute *attr, char *page) 771 { 772 char nss_name[NSS_NAME_SIZE + 1] = {}; 773 774 reipl_get_ascii_nss_name(nss_name, reipl_block_nss); 775 return sprintf(page, "%s\n", nss_name); 776 } 777 778 static ssize_t reipl_nss_name_store(struct kobject *kobj, 779 struct kobj_attribute *attr, 780 const char *buf, size_t len) 781 { 782 int nss_len; 783 784 /* ignore trailing newline */ 785 nss_len = len; 786 if ((len > 0) && (buf[len - 1] == '\n')) 787 nss_len--; 788 789 if (nss_len > NSS_NAME_SIZE) 790 return -EINVAL; 791 792 memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE); 793 if (nss_len > 0) { 794 reipl_block_nss->ipl_info.ccw.vm_flags |= 795 DIAG308_VM_FLAGS_NSS_VALID; 796 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len); 797 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len); 798 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len); 799 } else { 800 reipl_block_nss->ipl_info.ccw.vm_flags &= 801 ~DIAG308_VM_FLAGS_NSS_VALID; 802 } 803 804 return len; 805 } 806 807 static struct kobj_attribute sys_reipl_nss_name_attr = 808 __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show, 809 reipl_nss_name_store); 810 811 static struct kobj_attribute sys_reipl_nss_loadparm_attr = 812 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show, 813 reipl_nss_loadparm_store); 814 815 static struct attribute *reipl_nss_attrs[] = { 816 &sys_reipl_nss_name_attr.attr, 817 &sys_reipl_nss_loadparm_attr.attr, 818 &sys_reipl_nss_vmparm_attr.attr, 819 NULL, 820 }; 821 822 static struct attribute_group reipl_nss_attr_group = { 823 .name = IPL_NSS_STR, 824 .attrs = reipl_nss_attrs, 825 }; 826 827 /* reipl type */ 828 829 static int reipl_set_type(enum ipl_type type) 830 { 831 if (!(reipl_capabilities & type)) 832 return -EINVAL; 833 834 switch(type) { 835 case IPL_TYPE_CCW: 836 if (diag308_set_works) 837 reipl_method = REIPL_METHOD_CCW_DIAG; 838 else if (MACHINE_IS_VM) 839 reipl_method = REIPL_METHOD_CCW_VM; 840 else 841 reipl_method = REIPL_METHOD_CCW_CIO; 842 reipl_block_actual = reipl_block_ccw; 843 break; 844 case IPL_TYPE_FCP: 845 if (diag308_set_works) 846 reipl_method = REIPL_METHOD_FCP_RW_DIAG; 847 else if (MACHINE_IS_VM) 848 reipl_method = REIPL_METHOD_FCP_RO_VM; 849 else 850 reipl_method = REIPL_METHOD_FCP_RO_DIAG; 851 reipl_block_actual = reipl_block_fcp; 852 break; 853 case IPL_TYPE_FCP_DUMP: 854 reipl_method = REIPL_METHOD_FCP_DUMP; 855 break; 856 case IPL_TYPE_NSS: 857 if (diag308_set_works) 858 reipl_method = REIPL_METHOD_NSS_DIAG; 859 else 860 reipl_method = REIPL_METHOD_NSS; 861 reipl_block_actual = reipl_block_nss; 862 break; 863 case IPL_TYPE_UNKNOWN: 864 reipl_method = REIPL_METHOD_DEFAULT; 865 break; 866 default: 867 BUG(); 868 } 869 reipl_type = type; 870 return 0; 871 } 872 873 static ssize_t reipl_type_show(struct kobject *kobj, 874 struct kobj_attribute *attr, char *page) 875 { 876 return sprintf(page, "%s\n", ipl_type_str(reipl_type)); 877 } 878 879 static ssize_t reipl_type_store(struct kobject *kobj, 880 struct kobj_attribute *attr, 881 const char *buf, size_t len) 882 { 883 int rc = -EINVAL; 884 885 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0) 886 rc = reipl_set_type(IPL_TYPE_CCW); 887 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0) 888 rc = reipl_set_type(IPL_TYPE_FCP); 889 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0) 890 rc = reipl_set_type(IPL_TYPE_NSS); 891 return (rc != 0) ? rc : len; 892 } 893 894 static struct kobj_attribute reipl_type_attr = 895 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store); 896 897 static struct kset *reipl_kset; 898 899 static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb, 900 const enum ipl_method m) 901 { 902 char loadparm[LOADPARM_LEN + 1] = {}; 903 char vmparm[DIAG308_VMPARM_SIZE + 1] = {}; 904 char nss_name[NSS_NAME_SIZE + 1] = {}; 905 size_t pos = 0; 906 907 reipl_get_ascii_loadparm(loadparm, ipb); 908 reipl_get_ascii_nss_name(nss_name, ipb); 909 reipl_get_ascii_vmparm(vmparm, ipb); 910 911 switch (m) { 912 case REIPL_METHOD_CCW_VM: 913 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno); 914 break; 915 case REIPL_METHOD_NSS: 916 pos = sprintf(dst, "IPL %s", nss_name); 917 break; 918 default: 919 break; 920 } 921 if (strlen(loadparm) > 0) 922 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm); 923 if (strlen(vmparm) > 0) 924 sprintf(dst + pos, " PARM %s", vmparm); 925 } 926 927 static void reipl_run(struct shutdown_trigger *trigger) 928 { 929 struct ccw_dev_id devid; 930 static char buf[128]; 931 932 switch (reipl_method) { 933 case REIPL_METHOD_CCW_CIO: 934 devid.devno = reipl_block_ccw->ipl_info.ccw.devno; 935 devid.ssid = 0; 936 reipl_ccw_dev(&devid); 937 break; 938 case REIPL_METHOD_CCW_VM: 939 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM); 940 __cpcmd(buf, NULL, 0, NULL); 941 break; 942 case REIPL_METHOD_CCW_DIAG: 943 diag308(DIAG308_SET, reipl_block_ccw); 944 diag308(DIAG308_IPL, NULL); 945 break; 946 case REIPL_METHOD_FCP_RW_DIAG: 947 diag308(DIAG308_SET, reipl_block_fcp); 948 diag308(DIAG308_IPL, NULL); 949 break; 950 case REIPL_METHOD_FCP_RO_DIAG: 951 diag308(DIAG308_IPL, NULL); 952 break; 953 case REIPL_METHOD_FCP_RO_VM: 954 __cpcmd("IPL", NULL, 0, NULL); 955 break; 956 case REIPL_METHOD_NSS_DIAG: 957 diag308(DIAG308_SET, reipl_block_nss); 958 diag308(DIAG308_IPL, NULL); 959 break; 960 case REIPL_METHOD_NSS: 961 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS); 962 __cpcmd(buf, NULL, 0, NULL); 963 break; 964 case REIPL_METHOD_DEFAULT: 965 if (MACHINE_IS_VM) 966 __cpcmd("IPL", NULL, 0, NULL); 967 diag308(DIAG308_IPL, NULL); 968 break; 969 case REIPL_METHOD_FCP_DUMP: 970 break; 971 } 972 disabled_wait((unsigned long) __builtin_return_address(0)); 973 } 974 975 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb) 976 { 977 ipb->hdr.len = IPL_PARM_BLK_CCW_LEN; 978 ipb->hdr.version = IPL_PARM_BLOCK_VERSION; 979 ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN; 980 ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW; 981 } 982 983 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb) 984 { 985 /* LOADPARM */ 986 /* check if read scp info worked and set loadparm */ 987 if (sclp_ipl_info.is_valid) 988 memcpy(ipb->ipl_info.ccw.load_parm, 989 &sclp_ipl_info.loadparm, LOADPARM_LEN); 990 else 991 /* read scp info failed: set empty loadparm (EBCDIC blanks) */ 992 memset(ipb->ipl_info.ccw.load_parm, 0x40, LOADPARM_LEN); 993 ipb->hdr.flags = DIAG308_FLAGS_LP_VALID; 994 995 /* VM PARM */ 996 if (MACHINE_IS_VM && diag308_set_works && 997 (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) { 998 999 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID; 1000 ipb->ipl_info.ccw.vm_parm_len = 1001 ipl_block.ipl_info.ccw.vm_parm_len; 1002 memcpy(ipb->ipl_info.ccw.vm_parm, 1003 ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE); 1004 } 1005 } 1006 1007 static int __init reipl_nss_init(void) 1008 { 1009 int rc; 1010 1011 if (!MACHINE_IS_VM) 1012 return 0; 1013 1014 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL); 1015 if (!reipl_block_nss) 1016 return -ENOMEM; 1017 1018 if (!diag308_set_works) 1019 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO; 1020 1021 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group); 1022 if (rc) 1023 return rc; 1024 1025 reipl_block_ccw_init(reipl_block_nss); 1026 if (ipl_info.type == IPL_TYPE_NSS) { 1027 memset(reipl_block_nss->ipl_info.ccw.nss_name, 1028 ' ', NSS_NAME_SIZE); 1029 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, 1030 kernel_nss_name, strlen(kernel_nss_name)); 1031 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE); 1032 reipl_block_nss->ipl_info.ccw.vm_flags |= 1033 DIAG308_VM_FLAGS_NSS_VALID; 1034 1035 reipl_block_ccw_fill_parms(reipl_block_nss); 1036 } 1037 1038 reipl_capabilities |= IPL_TYPE_NSS; 1039 return 0; 1040 } 1041 1042 static int __init reipl_ccw_init(void) 1043 { 1044 int rc; 1045 1046 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL); 1047 if (!reipl_block_ccw) 1048 return -ENOMEM; 1049 1050 if (MACHINE_IS_VM) { 1051 if (!diag308_set_works) 1052 sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO; 1053 rc = sysfs_create_group(&reipl_kset->kobj, 1054 &reipl_ccw_attr_group_vm); 1055 } else { 1056 if(!diag308_set_works) 1057 sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO; 1058 rc = sysfs_create_group(&reipl_kset->kobj, 1059 &reipl_ccw_attr_group_lpar); 1060 } 1061 if (rc) 1062 return rc; 1063 1064 reipl_block_ccw_init(reipl_block_ccw); 1065 if (ipl_info.type == IPL_TYPE_CCW) { 1066 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno; 1067 reipl_block_ccw_fill_parms(reipl_block_ccw); 1068 } 1069 1070 reipl_capabilities |= IPL_TYPE_CCW; 1071 return 0; 1072 } 1073 1074 static int __init reipl_fcp_init(void) 1075 { 1076 int rc; 1077 1078 if (!diag308_set_works) { 1079 if (ipl_info.type == IPL_TYPE_FCP) 1080 make_attrs_ro(reipl_fcp_attrs); 1081 else 1082 return 0; 1083 } 1084 1085 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL); 1086 if (!reipl_block_fcp) 1087 return -ENOMEM; 1088 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_fcp_attr_group); 1089 if (rc) { 1090 free_page((unsigned long)reipl_block_fcp); 1091 return rc; 1092 } 1093 if (ipl_info.type == IPL_TYPE_FCP) { 1094 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE); 1095 } else { 1096 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN; 1097 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION; 1098 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN; 1099 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP; 1100 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL; 1101 } 1102 reipl_capabilities |= IPL_TYPE_FCP; 1103 return 0; 1104 } 1105 1106 static int __init reipl_init(void) 1107 { 1108 int rc; 1109 1110 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj); 1111 if (!reipl_kset) 1112 return -ENOMEM; 1113 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr); 1114 if (rc) { 1115 kset_unregister(reipl_kset); 1116 return rc; 1117 } 1118 rc = reipl_ccw_init(); 1119 if (rc) 1120 return rc; 1121 rc = reipl_fcp_init(); 1122 if (rc) 1123 return rc; 1124 rc = reipl_nss_init(); 1125 if (rc) 1126 return rc; 1127 rc = reipl_set_type(ipl_info.type); 1128 if (rc) 1129 return rc; 1130 return 0; 1131 } 1132 1133 static struct shutdown_action __refdata reipl_action = { 1134 .name = SHUTDOWN_ACTION_REIPL_STR, 1135 .fn = reipl_run, 1136 .init = reipl_init, 1137 }; 1138 1139 /* 1140 * dump shutdown action: Dump Linux on shutdown. 1141 */ 1142 1143 /* FCP dump device attributes */ 1144 1145 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n", 1146 dump_block_fcp->ipl_info.fcp.wwpn); 1147 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n", 1148 dump_block_fcp->ipl_info.fcp.lun); 1149 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n", 1150 dump_block_fcp->ipl_info.fcp.bootprog); 1151 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n", 1152 dump_block_fcp->ipl_info.fcp.br_lba); 1153 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n", 1154 dump_block_fcp->ipl_info.fcp.devno); 1155 1156 static struct attribute *dump_fcp_attrs[] = { 1157 &sys_dump_fcp_device_attr.attr, 1158 &sys_dump_fcp_wwpn_attr.attr, 1159 &sys_dump_fcp_lun_attr.attr, 1160 &sys_dump_fcp_bootprog_attr.attr, 1161 &sys_dump_fcp_br_lba_attr.attr, 1162 NULL, 1163 }; 1164 1165 static struct attribute_group dump_fcp_attr_group = { 1166 .name = IPL_FCP_STR, 1167 .attrs = dump_fcp_attrs, 1168 }; 1169 1170 /* CCW dump device attributes */ 1171 1172 DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n", 1173 dump_block_ccw->ipl_info.ccw.devno); 1174 1175 static struct attribute *dump_ccw_attrs[] = { 1176 &sys_dump_ccw_device_attr.attr, 1177 NULL, 1178 }; 1179 1180 static struct attribute_group dump_ccw_attr_group = { 1181 .name = IPL_CCW_STR, 1182 .attrs = dump_ccw_attrs, 1183 }; 1184 1185 /* dump type */ 1186 1187 static int dump_set_type(enum dump_type type) 1188 { 1189 if (!(dump_capabilities & type)) 1190 return -EINVAL; 1191 switch (type) { 1192 case DUMP_TYPE_CCW: 1193 if (diag308_set_works) 1194 dump_method = DUMP_METHOD_CCW_DIAG; 1195 else if (MACHINE_IS_VM) 1196 dump_method = DUMP_METHOD_CCW_VM; 1197 else 1198 dump_method = DUMP_METHOD_CCW_CIO; 1199 break; 1200 case DUMP_TYPE_FCP: 1201 dump_method = DUMP_METHOD_FCP_DIAG; 1202 break; 1203 default: 1204 dump_method = DUMP_METHOD_NONE; 1205 } 1206 dump_type = type; 1207 return 0; 1208 } 1209 1210 static ssize_t dump_type_show(struct kobject *kobj, 1211 struct kobj_attribute *attr, char *page) 1212 { 1213 return sprintf(page, "%s\n", dump_type_str(dump_type)); 1214 } 1215 1216 static ssize_t dump_type_store(struct kobject *kobj, 1217 struct kobj_attribute *attr, 1218 const char *buf, size_t len) 1219 { 1220 int rc = -EINVAL; 1221 1222 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0) 1223 rc = dump_set_type(DUMP_TYPE_NONE); 1224 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0) 1225 rc = dump_set_type(DUMP_TYPE_CCW); 1226 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0) 1227 rc = dump_set_type(DUMP_TYPE_FCP); 1228 return (rc != 0) ? rc : len; 1229 } 1230 1231 static struct kobj_attribute dump_type_attr = 1232 __ATTR(dump_type, 0644, dump_type_show, dump_type_store); 1233 1234 static struct kset *dump_kset; 1235 1236 static void dump_run(struct shutdown_trigger *trigger) 1237 { 1238 struct ccw_dev_id devid; 1239 static char buf[100]; 1240 1241 switch (dump_method) { 1242 case DUMP_METHOD_CCW_CIO: 1243 smp_send_stop(); 1244 devid.devno = dump_block_ccw->ipl_info.ccw.devno; 1245 devid.ssid = 0; 1246 reipl_ccw_dev(&devid); 1247 break; 1248 case DUMP_METHOD_CCW_VM: 1249 smp_send_stop(); 1250 sprintf(buf, "STORE STATUS"); 1251 __cpcmd(buf, NULL, 0, NULL); 1252 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno); 1253 __cpcmd(buf, NULL, 0, NULL); 1254 break; 1255 case DUMP_METHOD_CCW_DIAG: 1256 diag308(DIAG308_SET, dump_block_ccw); 1257 diag308(DIAG308_DUMP, NULL); 1258 break; 1259 case DUMP_METHOD_FCP_DIAG: 1260 diag308(DIAG308_SET, dump_block_fcp); 1261 diag308(DIAG308_DUMP, NULL); 1262 break; 1263 case DUMP_METHOD_NONE: 1264 return; 1265 } 1266 printk(KERN_EMERG "Dump failed!\n"); 1267 } 1268 1269 static int __init dump_ccw_init(void) 1270 { 1271 int rc; 1272 1273 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL); 1274 if (!dump_block_ccw) 1275 return -ENOMEM; 1276 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group); 1277 if (rc) { 1278 free_page((unsigned long)dump_block_ccw); 1279 return rc; 1280 } 1281 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN; 1282 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION; 1283 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN; 1284 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW; 1285 dump_capabilities |= DUMP_TYPE_CCW; 1286 return 0; 1287 } 1288 1289 static int __init dump_fcp_init(void) 1290 { 1291 int rc; 1292 1293 if (!sclp_ipl_info.has_dump) 1294 return 0; /* LDIPL DUMP is not installed */ 1295 if (!diag308_set_works) 1296 return 0; 1297 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL); 1298 if (!dump_block_fcp) 1299 return -ENOMEM; 1300 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group); 1301 if (rc) { 1302 free_page((unsigned long)dump_block_fcp); 1303 return rc; 1304 } 1305 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN; 1306 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION; 1307 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN; 1308 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP; 1309 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP; 1310 dump_capabilities |= DUMP_TYPE_FCP; 1311 return 0; 1312 } 1313 1314 static int __init dump_init(void) 1315 { 1316 int rc; 1317 1318 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj); 1319 if (!dump_kset) 1320 return -ENOMEM; 1321 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr); 1322 if (rc) { 1323 kset_unregister(dump_kset); 1324 return rc; 1325 } 1326 rc = dump_ccw_init(); 1327 if (rc) 1328 return rc; 1329 rc = dump_fcp_init(); 1330 if (rc) 1331 return rc; 1332 dump_set_type(DUMP_TYPE_NONE); 1333 return 0; 1334 } 1335 1336 static struct shutdown_action __refdata dump_action = { 1337 .name = SHUTDOWN_ACTION_DUMP_STR, 1338 .fn = dump_run, 1339 .init = dump_init, 1340 }; 1341 1342 static void dump_reipl_run(struct shutdown_trigger *trigger) 1343 { 1344 preempt_disable(); 1345 /* 1346 * Bypass dynamic address translation (DAT) when storing IPL parameter 1347 * information block address and checksum into the prefix area 1348 * (corresponding to absolute addresses 0-8191). 1349 * When enhanced DAT applies and the STE format control in one, 1350 * the absolute address is formed without prefixing. In this case a 1351 * normal store (stg/st) into the prefix area would no more match to 1352 * absolute addresses 0-8191. 1353 */ 1354 #ifdef CONFIG_64BIT 1355 asm volatile("sturg %0,%1" 1356 :: "a" ((unsigned long) reipl_block_actual), 1357 "a" (&lowcore_ptr[smp_processor_id()]->ipib)); 1358 #else 1359 asm volatile("stura %0,%1" 1360 :: "a" ((unsigned long) reipl_block_actual), 1361 "a" (&lowcore_ptr[smp_processor_id()]->ipib)); 1362 #endif 1363 asm volatile("stura %0,%1" 1364 :: "a" (csum_partial(reipl_block_actual, 1365 reipl_block_actual->hdr.len, 0)), 1366 "a" (&lowcore_ptr[smp_processor_id()]->ipib_checksum)); 1367 preempt_enable(); 1368 dump_run(trigger); 1369 } 1370 1371 static int __init dump_reipl_init(void) 1372 { 1373 if (!diag308_set_works) 1374 return -EOPNOTSUPP; 1375 else 1376 return 0; 1377 } 1378 1379 static struct shutdown_action __refdata dump_reipl_action = { 1380 .name = SHUTDOWN_ACTION_DUMP_REIPL_STR, 1381 .fn = dump_reipl_run, 1382 .init = dump_reipl_init, 1383 }; 1384 1385 /* 1386 * vmcmd shutdown action: Trigger vm command on shutdown. 1387 */ 1388 1389 static char vmcmd_on_reboot[128]; 1390 static char vmcmd_on_panic[128]; 1391 static char vmcmd_on_halt[128]; 1392 static char vmcmd_on_poff[128]; 1393 1394 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot); 1395 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic); 1396 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt); 1397 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff); 1398 1399 static struct attribute *vmcmd_attrs[] = { 1400 &sys_vmcmd_on_reboot_attr.attr, 1401 &sys_vmcmd_on_panic_attr.attr, 1402 &sys_vmcmd_on_halt_attr.attr, 1403 &sys_vmcmd_on_poff_attr.attr, 1404 NULL, 1405 }; 1406 1407 static struct attribute_group vmcmd_attr_group = { 1408 .attrs = vmcmd_attrs, 1409 }; 1410 1411 static struct kset *vmcmd_kset; 1412 1413 static void vmcmd_run(struct shutdown_trigger *trigger) 1414 { 1415 char *cmd, *next_cmd; 1416 1417 if (strcmp(trigger->name, ON_REIPL_STR) == 0) 1418 cmd = vmcmd_on_reboot; 1419 else if (strcmp(trigger->name, ON_PANIC_STR) == 0) 1420 cmd = vmcmd_on_panic; 1421 else if (strcmp(trigger->name, ON_HALT_STR) == 0) 1422 cmd = vmcmd_on_halt; 1423 else if (strcmp(trigger->name, ON_POFF_STR) == 0) 1424 cmd = vmcmd_on_poff; 1425 else 1426 return; 1427 1428 if (strlen(cmd) == 0) 1429 return; 1430 do { 1431 next_cmd = strchr(cmd, '\n'); 1432 if (next_cmd) { 1433 next_cmd[0] = 0; 1434 next_cmd += 1; 1435 } 1436 __cpcmd(cmd, NULL, 0, NULL); 1437 cmd = next_cmd; 1438 } while (cmd != NULL); 1439 } 1440 1441 static int vmcmd_init(void) 1442 { 1443 if (!MACHINE_IS_VM) 1444 return -ENOTSUPP; 1445 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj); 1446 if (!vmcmd_kset) 1447 return -ENOMEM; 1448 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group); 1449 } 1450 1451 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR, 1452 vmcmd_run, vmcmd_init}; 1453 1454 /* 1455 * stop shutdown action: Stop Linux on shutdown. 1456 */ 1457 1458 static void stop_run(struct shutdown_trigger *trigger) 1459 { 1460 if (strcmp(trigger->name, ON_PANIC_STR) == 0) 1461 disabled_wait((unsigned long) __builtin_return_address(0)); 1462 else { 1463 signal_processor(smp_processor_id(), sigp_stop); 1464 for (;;); 1465 } 1466 } 1467 1468 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR, 1469 stop_run, NULL}; 1470 1471 /* action list */ 1472 1473 static struct shutdown_action *shutdown_actions_list[] = { 1474 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action, 1475 &vmcmd_action, &stop_action}; 1476 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *)) 1477 1478 /* 1479 * Trigger section 1480 */ 1481 1482 static struct kset *shutdown_actions_kset; 1483 1484 static int set_trigger(const char *buf, struct shutdown_trigger *trigger, 1485 size_t len) 1486 { 1487 int i; 1488 1489 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) { 1490 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) { 1491 if (shutdown_actions_list[i]->init_rc) { 1492 return shutdown_actions_list[i]->init_rc; 1493 } else { 1494 trigger->action = shutdown_actions_list[i]; 1495 return len; 1496 } 1497 } 1498 } 1499 return -EINVAL; 1500 } 1501 1502 /* on reipl */ 1503 1504 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR, 1505 &reipl_action}; 1506 1507 static ssize_t on_reboot_show(struct kobject *kobj, 1508 struct kobj_attribute *attr, char *page) 1509 { 1510 return sprintf(page, "%s\n", on_reboot_trigger.action->name); 1511 } 1512 1513 static ssize_t on_reboot_store(struct kobject *kobj, 1514 struct kobj_attribute *attr, 1515 const char *buf, size_t len) 1516 { 1517 return set_trigger(buf, &on_reboot_trigger, len); 1518 } 1519 1520 static struct kobj_attribute on_reboot_attr = 1521 __ATTR(on_reboot, 0644, on_reboot_show, on_reboot_store); 1522 1523 static void do_machine_restart(char *__unused) 1524 { 1525 smp_send_stop(); 1526 on_reboot_trigger.action->fn(&on_reboot_trigger); 1527 reipl_run(NULL); 1528 } 1529 void (*_machine_restart)(char *command) = do_machine_restart; 1530 1531 /* on panic */ 1532 1533 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action}; 1534 1535 static ssize_t on_panic_show(struct kobject *kobj, 1536 struct kobj_attribute *attr, char *page) 1537 { 1538 return sprintf(page, "%s\n", on_panic_trigger.action->name); 1539 } 1540 1541 static ssize_t on_panic_store(struct kobject *kobj, 1542 struct kobj_attribute *attr, 1543 const char *buf, size_t len) 1544 { 1545 return set_trigger(buf, &on_panic_trigger, len); 1546 } 1547 1548 static struct kobj_attribute on_panic_attr = 1549 __ATTR(on_panic, 0644, on_panic_show, on_panic_store); 1550 1551 static void do_panic(void) 1552 { 1553 on_panic_trigger.action->fn(&on_panic_trigger); 1554 stop_run(&on_panic_trigger); 1555 } 1556 1557 /* on halt */ 1558 1559 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action}; 1560 1561 static ssize_t on_halt_show(struct kobject *kobj, 1562 struct kobj_attribute *attr, char *page) 1563 { 1564 return sprintf(page, "%s\n", on_halt_trigger.action->name); 1565 } 1566 1567 static ssize_t on_halt_store(struct kobject *kobj, 1568 struct kobj_attribute *attr, 1569 const char *buf, size_t len) 1570 { 1571 return set_trigger(buf, &on_halt_trigger, len); 1572 } 1573 1574 static struct kobj_attribute on_halt_attr = 1575 __ATTR(on_halt, 0644, on_halt_show, on_halt_store); 1576 1577 1578 static void do_machine_halt(void) 1579 { 1580 smp_send_stop(); 1581 on_halt_trigger.action->fn(&on_halt_trigger); 1582 stop_run(&on_halt_trigger); 1583 } 1584 void (*_machine_halt)(void) = do_machine_halt; 1585 1586 /* on power off */ 1587 1588 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action}; 1589 1590 static ssize_t on_poff_show(struct kobject *kobj, 1591 struct kobj_attribute *attr, char *page) 1592 { 1593 return sprintf(page, "%s\n", on_poff_trigger.action->name); 1594 } 1595 1596 static ssize_t on_poff_store(struct kobject *kobj, 1597 struct kobj_attribute *attr, 1598 const char *buf, size_t len) 1599 { 1600 return set_trigger(buf, &on_poff_trigger, len); 1601 } 1602 1603 static struct kobj_attribute on_poff_attr = 1604 __ATTR(on_poff, 0644, on_poff_show, on_poff_store); 1605 1606 1607 static void do_machine_power_off(void) 1608 { 1609 smp_send_stop(); 1610 on_poff_trigger.action->fn(&on_poff_trigger); 1611 stop_run(&on_poff_trigger); 1612 } 1613 void (*_machine_power_off)(void) = do_machine_power_off; 1614 1615 static void __init shutdown_triggers_init(void) 1616 { 1617 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL, 1618 firmware_kobj); 1619 if (!shutdown_actions_kset) 1620 goto fail; 1621 if (sysfs_create_file(&shutdown_actions_kset->kobj, 1622 &on_reboot_attr.attr)) 1623 goto fail; 1624 if (sysfs_create_file(&shutdown_actions_kset->kobj, 1625 &on_panic_attr.attr)) 1626 goto fail; 1627 if (sysfs_create_file(&shutdown_actions_kset->kobj, 1628 &on_halt_attr.attr)) 1629 goto fail; 1630 if (sysfs_create_file(&shutdown_actions_kset->kobj, 1631 &on_poff_attr.attr)) 1632 goto fail; 1633 1634 return; 1635 fail: 1636 panic("shutdown_triggers_init failed\n"); 1637 } 1638 1639 static void __init shutdown_actions_init(void) 1640 { 1641 int i; 1642 1643 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) { 1644 if (!shutdown_actions_list[i]->init) 1645 continue; 1646 shutdown_actions_list[i]->init_rc = 1647 shutdown_actions_list[i]->init(); 1648 } 1649 } 1650 1651 static int __init s390_ipl_init(void) 1652 { 1653 sclp_get_ipl_info(&sclp_ipl_info); 1654 shutdown_actions_init(); 1655 shutdown_triggers_init(); 1656 return 0; 1657 } 1658 1659 __initcall(s390_ipl_init); 1660 1661 static void __init strncpy_skip_quote(char *dst, char *src, int n) 1662 { 1663 int sx, dx; 1664 1665 dx = 0; 1666 for (sx = 0; src[sx] != 0; sx++) { 1667 if (src[sx] == '"') 1668 continue; 1669 dst[dx++] = src[sx]; 1670 if (dx >= n) 1671 break; 1672 } 1673 } 1674 1675 static int __init vmcmd_on_reboot_setup(char *str) 1676 { 1677 if (!MACHINE_IS_VM) 1678 return 1; 1679 strncpy_skip_quote(vmcmd_on_reboot, str, 127); 1680 vmcmd_on_reboot[127] = 0; 1681 on_reboot_trigger.action = &vmcmd_action; 1682 return 1; 1683 } 1684 __setup("vmreboot=", vmcmd_on_reboot_setup); 1685 1686 static int __init vmcmd_on_panic_setup(char *str) 1687 { 1688 if (!MACHINE_IS_VM) 1689 return 1; 1690 strncpy_skip_quote(vmcmd_on_panic, str, 127); 1691 vmcmd_on_panic[127] = 0; 1692 on_panic_trigger.action = &vmcmd_action; 1693 return 1; 1694 } 1695 __setup("vmpanic=", vmcmd_on_panic_setup); 1696 1697 static int __init vmcmd_on_halt_setup(char *str) 1698 { 1699 if (!MACHINE_IS_VM) 1700 return 1; 1701 strncpy_skip_quote(vmcmd_on_halt, str, 127); 1702 vmcmd_on_halt[127] = 0; 1703 on_halt_trigger.action = &vmcmd_action; 1704 return 1; 1705 } 1706 __setup("vmhalt=", vmcmd_on_halt_setup); 1707 1708 static int __init vmcmd_on_poff_setup(char *str) 1709 { 1710 if (!MACHINE_IS_VM) 1711 return 1; 1712 strncpy_skip_quote(vmcmd_on_poff, str, 127); 1713 vmcmd_on_poff[127] = 0; 1714 on_poff_trigger.action = &vmcmd_action; 1715 return 1; 1716 } 1717 __setup("vmpoff=", vmcmd_on_poff_setup); 1718 1719 static int on_panic_notify(struct notifier_block *self, 1720 unsigned long event, void *data) 1721 { 1722 do_panic(); 1723 return NOTIFY_OK; 1724 } 1725 1726 static struct notifier_block on_panic_nb = { 1727 .notifier_call = on_panic_notify, 1728 .priority = INT_MIN, 1729 }; 1730 1731 void __init setup_ipl(void) 1732 { 1733 ipl_info.type = get_ipl_type(); 1734 switch (ipl_info.type) { 1735 case IPL_TYPE_CCW: 1736 ipl_info.data.ccw.dev_id.devno = ipl_devno; 1737 ipl_info.data.ccw.dev_id.ssid = 0; 1738 break; 1739 case IPL_TYPE_FCP: 1740 case IPL_TYPE_FCP_DUMP: 1741 ipl_info.data.fcp.dev_id.devno = 1742 IPL_PARMBLOCK_START->ipl_info.fcp.devno; 1743 ipl_info.data.fcp.dev_id.ssid = 0; 1744 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn; 1745 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun; 1746 break; 1747 case IPL_TYPE_NSS: 1748 strncpy(ipl_info.data.nss.name, kernel_nss_name, 1749 sizeof(ipl_info.data.nss.name)); 1750 break; 1751 case IPL_TYPE_UNKNOWN: 1752 /* We have no info to copy */ 1753 break; 1754 } 1755 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb); 1756 } 1757 1758 void __init ipl_update_parameters(void) 1759 { 1760 int rc; 1761 1762 rc = diag308(DIAG308_STORE, &ipl_block); 1763 if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG)) 1764 diag308_set_works = 1; 1765 } 1766 1767 void __init ipl_save_parameters(void) 1768 { 1769 struct cio_iplinfo iplinfo; 1770 unsigned int *ipl_ptr; 1771 void *src, *dst; 1772 1773 if (cio_get_iplinfo(&iplinfo)) 1774 return; 1775 1776 ipl_devno = iplinfo.devno; 1777 ipl_flags |= IPL_DEVNO_VALID; 1778 if (!iplinfo.is_qdio) 1779 return; 1780 ipl_flags |= IPL_PARMBLOCK_VALID; 1781 ipl_ptr = (unsigned int *)__LC_IPL_PARMBLOCK_PTR; 1782 src = (void *)(unsigned long)*ipl_ptr; 1783 dst = (void *)IPL_PARMBLOCK_ORIGIN; 1784 memmove(dst, src, PAGE_SIZE); 1785 *ipl_ptr = IPL_PARMBLOCK_ORIGIN; 1786 } 1787 1788 static LIST_HEAD(rcall); 1789 static DEFINE_MUTEX(rcall_mutex); 1790 1791 void register_reset_call(struct reset_call *reset) 1792 { 1793 mutex_lock(&rcall_mutex); 1794 list_add(&reset->list, &rcall); 1795 mutex_unlock(&rcall_mutex); 1796 } 1797 EXPORT_SYMBOL_GPL(register_reset_call); 1798 1799 void unregister_reset_call(struct reset_call *reset) 1800 { 1801 mutex_lock(&rcall_mutex); 1802 list_del(&reset->list); 1803 mutex_unlock(&rcall_mutex); 1804 } 1805 EXPORT_SYMBOL_GPL(unregister_reset_call); 1806 1807 static void do_reset_calls(void) 1808 { 1809 struct reset_call *reset; 1810 1811 list_for_each_entry(reset, &rcall, list) 1812 reset->fn(); 1813 } 1814 1815 u32 dump_prefix_page; 1816 1817 void s390_reset_system(void) 1818 { 1819 struct _lowcore *lc; 1820 1821 lc = (struct _lowcore *)(unsigned long) store_prefix(); 1822 1823 /* Stack for interrupt/machine check handler */ 1824 lc->panic_stack = S390_lowcore.panic_stack; 1825 1826 /* Save prefix page address for dump case */ 1827 dump_prefix_page = (u32)(unsigned long) lc; 1828 1829 /* Disable prefixing */ 1830 set_prefix(0); 1831 1832 /* Disable lowcore protection */ 1833 __ctl_clear_bit(0,28); 1834 1835 /* Set new machine check handler */ 1836 S390_lowcore.mcck_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK; 1837 S390_lowcore.mcck_new_psw.addr = 1838 PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler; 1839 1840 /* Set new program check handler */ 1841 S390_lowcore.program_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK; 1842 S390_lowcore.program_new_psw.addr = 1843 PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler; 1844 1845 do_reset_calls(); 1846 } 1847 1848