1/* 2 * ipl/reipl/dump support for Linux on s390. 3 * 4 * Copyright IBM Corp. 2005, 2012 5 * Author(s): Michael Holzheu <holzheu@de.ibm.com> 6 * Heiko Carstens <heiko.carstens@de.ibm.com> 7 * Volker Sameske <sameske@de.ibm.com> 8 */ 9 10#include <linux/types.h> 11#include <linux/module.h> 12#include <linux/device.h> 13#include <linux/delay.h> 14#include <linux/reboot.h> 15#include <linux/ctype.h> 16#include <linux/fs.h> 17#include <linux/gfp.h> 18#include <linux/crash_dump.h> 19#include <linux/debug_locks.h> 20#include <asm/ipl.h> 21#include <asm/smp.h> 22#include <asm/setup.h> 23#include <asm/cpcmd.h> 24#include <asm/cio.h> 25#include <asm/ebcdic.h> 26#include <asm/reset.h> 27#include <asm/sclp.h> 28#include <asm/checksum.h> 29#include <asm/debug.h> 30#include <asm/os_info.h> 31#include "entry.h" 32 33#define IPL_PARM_BLOCK_VERSION 0 34 35#define IPL_UNKNOWN_STR "unknown" 36#define IPL_CCW_STR "ccw" 37#define IPL_FCP_STR "fcp" 38#define IPL_FCP_DUMP_STR "fcp_dump" 39#define IPL_NSS_STR "nss" 40 41#define DUMP_CCW_STR "ccw" 42#define DUMP_FCP_STR "fcp" 43#define DUMP_NONE_STR "none" 44 45/* 46 * Four shutdown trigger types are supported: 47 * - panic 48 * - halt 49 * - power off 50 * - reipl 51 * - restart 52 */ 53#define ON_PANIC_STR "on_panic" 54#define ON_HALT_STR "on_halt" 55#define ON_POFF_STR "on_poff" 56#define ON_REIPL_STR "on_reboot" 57#define ON_RESTART_STR "on_restart" 58 59struct shutdown_action; 60struct shutdown_trigger { 61 char *name; 62 struct shutdown_action *action; 63}; 64 65/* 66 * The following shutdown action types are supported: 67 */ 68#define SHUTDOWN_ACTION_IPL_STR "ipl" 69#define SHUTDOWN_ACTION_REIPL_STR "reipl" 70#define SHUTDOWN_ACTION_DUMP_STR "dump" 71#define SHUTDOWN_ACTION_VMCMD_STR "vmcmd" 72#define SHUTDOWN_ACTION_STOP_STR "stop" 73#define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl" 74 75struct shutdown_action { 76 char *name; 77 void (*fn) (struct shutdown_trigger *trigger); 78 int (*init) (void); 79 int init_rc; 80}; 81 82static char *ipl_type_str(enum ipl_type type) 83{ 84 switch (type) { 85 case IPL_TYPE_CCW: 86 return IPL_CCW_STR; 87 case IPL_TYPE_FCP: 88 return IPL_FCP_STR; 89 case IPL_TYPE_FCP_DUMP: 90 return IPL_FCP_DUMP_STR; 91 case IPL_TYPE_NSS: 92 return IPL_NSS_STR; 93 case IPL_TYPE_UNKNOWN: 94 default: 95 return IPL_UNKNOWN_STR; 96 } 97} 98 99enum dump_type { 100 DUMP_TYPE_NONE = 1, 101 DUMP_TYPE_CCW = 2, 102 DUMP_TYPE_FCP = 4, 103}; 104 105static char *dump_type_str(enum dump_type type) 106{ 107 switch (type) { 108 case DUMP_TYPE_NONE: 109 return DUMP_NONE_STR; 110 case DUMP_TYPE_CCW: 111 return DUMP_CCW_STR; 112 case DUMP_TYPE_FCP: 113 return DUMP_FCP_STR; 114 default: 115 return NULL; 116 } 117} 118 119/* 120 * Must be in data section since the bss section 121 * is not cleared when these are accessed. 122 */ 123static u16 ipl_devno __attribute__((__section__(".data"))) = 0; 124u32 ipl_flags __attribute__((__section__(".data"))) = 0; 125 126enum ipl_method { 127 REIPL_METHOD_CCW_CIO, 128 REIPL_METHOD_CCW_DIAG, 129 REIPL_METHOD_CCW_VM, 130 REIPL_METHOD_FCP_RO_DIAG, 131 REIPL_METHOD_FCP_RW_DIAG, 132 REIPL_METHOD_FCP_RO_VM, 133 REIPL_METHOD_FCP_DUMP, 134 REIPL_METHOD_NSS, 135 REIPL_METHOD_NSS_DIAG, 136 REIPL_METHOD_DEFAULT, 137}; 138 139enum dump_method { 140 DUMP_METHOD_NONE, 141 DUMP_METHOD_CCW_CIO, 142 DUMP_METHOD_CCW_DIAG, 143 DUMP_METHOD_CCW_VM, 144 DUMP_METHOD_FCP_DIAG, 145}; 146 147static int diag308_set_works = 0; 148 149static struct ipl_parameter_block ipl_block; 150 151static int reipl_capabilities = IPL_TYPE_UNKNOWN; 152 153static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN; 154static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT; 155static struct ipl_parameter_block *reipl_block_fcp; 156static struct ipl_parameter_block *reipl_block_ccw; 157static struct ipl_parameter_block *reipl_block_nss; 158static struct ipl_parameter_block *reipl_block_actual; 159 160static int dump_capabilities = DUMP_TYPE_NONE; 161static enum dump_type dump_type = DUMP_TYPE_NONE; 162static enum dump_method dump_method = DUMP_METHOD_NONE; 163static struct ipl_parameter_block *dump_block_fcp; 164static struct ipl_parameter_block *dump_block_ccw; 165 166static struct sclp_ipl_info sclp_ipl_info; 167 168int diag308(unsigned long subcode, void *addr) 169{ 170 register unsigned long _addr asm("0") = (unsigned long) addr; 171 register unsigned long _rc asm("1") = 0; 172 173 asm volatile( 174 " diag %0,%2,0x308\n" 175 "0:\n" 176 EX_TABLE(0b,0b) 177 : "+d" (_addr), "+d" (_rc) 178 : "d" (subcode) : "cc", "memory"); 179 return _rc; 180} 181EXPORT_SYMBOL_GPL(diag308); 182 183/* SYSFS */ 184 185#define IPL_ATTR_SHOW_FN(_prefix, _name, _format, args...) \ 186static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \ 187 struct kobj_attribute *attr, \ 188 char *page) \ 189{ \ 190 return snprintf(page, PAGE_SIZE, _format, ##args); \ 191} 192 193#define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \ 194IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value) \ 195static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ 196 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL) 197 198#define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \ 199IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value) \ 200static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \ 201 struct kobj_attribute *attr, \ 202 const char *buf, size_t len) \ 203{ \ 204 unsigned long long value; \ 205 if (sscanf(buf, _fmt_in, &value) != 1) \ 206 return -EINVAL; \ 207 _value = value; \ 208 return len; \ 209} \ 210static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ 211 __ATTR(_name,(S_IRUGO | S_IWUSR), \ 212 sys_##_prefix##_##_name##_show, \ 213 sys_##_prefix##_##_name##_store) 214 215#define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\ 216IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, _value) \ 217static 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 strim(_value); \ 223 return len; \ 224} \ 225static 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 230static 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 242static __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 261struct ipl_info ipl_info; 262EXPORT_SYMBOL_GPL(ipl_info); 263 264static 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 270static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type); 271 272/* VM IPL PARM routines */ 273static size_t reipl_get_ascii_vmparm(char *dest, size_t size, 274 const struct ipl_parameter_block *ipb) 275{ 276 int i; 277 size_t len; 278 char has_lowercase = 0; 279 280 len = 0; 281 if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) && 282 (ipb->ipl_info.ccw.vm_parm_len > 0)) { 283 284 len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len); 285 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len); 286 /* If at least one character is lowercase, we assume mixed 287 * case; otherwise we convert everything to lowercase. 288 */ 289 for (i = 0; i < len; i++) 290 if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */ 291 (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */ 292 (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */ 293 has_lowercase = 1; 294 break; 295 } 296 if (!has_lowercase) 297 EBC_TOLOWER(dest, len); 298 EBCASC(dest, len); 299 } 300 dest[len] = 0; 301 302 return len; 303} 304 305size_t append_ipl_vmparm(char *dest, size_t size) 306{ 307 size_t rc; 308 309 rc = 0; 310 if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW)) 311 rc = reipl_get_ascii_vmparm(dest, size, &ipl_block); 312 else 313 dest[0] = 0; 314 return rc; 315} 316 317static ssize_t ipl_vm_parm_show(struct kobject *kobj, 318 struct kobj_attribute *attr, char *page) 319{ 320 char parm[DIAG308_VMPARM_SIZE + 1] = {}; 321 322 append_ipl_vmparm(parm, sizeof(parm)); 323 return sprintf(page, "%s\n", parm); 324} 325 326static size_t scpdata_length(const char* buf, size_t count) 327{ 328 while (count) { 329 if (buf[count - 1] != '\0' && buf[count - 1] != ' ') 330 break; 331 count--; 332 } 333 return count; 334} 335 336static size_t reipl_append_ascii_scpdata(char *dest, size_t size, 337 const struct ipl_parameter_block *ipb) 338{ 339 size_t count; 340 size_t i; 341 int has_lowercase; 342 343 count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data, 344 ipb->ipl_info.fcp.scp_data_len)); 345 if (!count) 346 goto out; 347 348 has_lowercase = 0; 349 for (i = 0; i < count; i++) { 350 if (!isascii(ipb->ipl_info.fcp.scp_data[i])) { 351 count = 0; 352 goto out; 353 } 354 if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i])) 355 has_lowercase = 1; 356 } 357 358 if (has_lowercase) 359 memcpy(dest, ipb->ipl_info.fcp.scp_data, count); 360 else 361 for (i = 0; i < count; i++) 362 dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]); 363out: 364 dest[count] = '\0'; 365 return count; 366} 367 368size_t append_ipl_scpdata(char *dest, size_t len) 369{ 370 size_t rc; 371 372 rc = 0; 373 if (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP) 374 rc = reipl_append_ascii_scpdata(dest, len, &ipl_block); 375 else 376 dest[0] = 0; 377 return rc; 378} 379 380 381static struct kobj_attribute sys_ipl_vm_parm_attr = 382 __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL); 383 384static ssize_t sys_ipl_device_show(struct kobject *kobj, 385 struct kobj_attribute *attr, char *page) 386{ 387 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START; 388 389 switch (ipl_info.type) { 390 case IPL_TYPE_CCW: 391 return sprintf(page, "0.0.%04x\n", ipl_devno); 392 case IPL_TYPE_FCP: 393 case IPL_TYPE_FCP_DUMP: 394 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno); 395 default: 396 return 0; 397 } 398} 399 400static struct kobj_attribute sys_ipl_device_attr = 401 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL); 402 403static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj, 404 struct bin_attribute *attr, char *buf, 405 loff_t off, size_t count) 406{ 407 return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START, 408 IPL_PARMBLOCK_SIZE); 409} 410static struct bin_attribute ipl_parameter_attr = 411 __BIN_ATTR(binary_parameter, S_IRUGO, ipl_parameter_read, NULL, 412 PAGE_SIZE); 413 414static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj, 415 struct bin_attribute *attr, char *buf, 416 loff_t off, size_t count) 417{ 418 unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len; 419 void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data; 420 421 return memory_read_from_buffer(buf, count, &off, scp_data, size); 422} 423static struct bin_attribute ipl_scp_data_attr = 424 __BIN_ATTR(scp_data, S_IRUGO, ipl_scp_data_read, NULL, PAGE_SIZE); 425 426static struct bin_attribute *ipl_fcp_bin_attrs[] = { 427 &ipl_parameter_attr, 428 &ipl_scp_data_attr, 429 NULL, 430}; 431 432/* FCP ipl device attributes */ 433 434DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long) 435 IPL_PARMBLOCK_START->ipl_info.fcp.wwpn); 436DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long) 437 IPL_PARMBLOCK_START->ipl_info.fcp.lun); 438DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long) 439 IPL_PARMBLOCK_START->ipl_info.fcp.bootprog); 440DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long) 441 IPL_PARMBLOCK_START->ipl_info.fcp.br_lba); 442 443static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj, 444 struct kobj_attribute *attr, char *page) 445{ 446 char loadparm[LOADPARM_LEN + 1] = {}; 447 448 if (!sclp_ipl_info.is_valid) 449 return sprintf(page, "#unknown#\n"); 450 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN); 451 EBCASC(loadparm, LOADPARM_LEN); 452 strim(loadparm); 453 return sprintf(page, "%s\n", loadparm); 454} 455 456static struct kobj_attribute sys_ipl_ccw_loadparm_attr = 457 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL); 458 459static struct attribute *ipl_fcp_attrs[] = { 460 &sys_ipl_type_attr.attr, 461 &sys_ipl_device_attr.attr, 462 &sys_ipl_fcp_wwpn_attr.attr, 463 &sys_ipl_fcp_lun_attr.attr, 464 &sys_ipl_fcp_bootprog_attr.attr, 465 &sys_ipl_fcp_br_lba_attr.attr, 466 &sys_ipl_ccw_loadparm_attr.attr, 467 NULL, 468}; 469 470static struct attribute_group ipl_fcp_attr_group = { 471 .attrs = ipl_fcp_attrs, 472 .bin_attrs = ipl_fcp_bin_attrs, 473}; 474 475/* CCW ipl device attributes */ 476 477static struct attribute *ipl_ccw_attrs_vm[] = { 478 &sys_ipl_type_attr.attr, 479 &sys_ipl_device_attr.attr, 480 &sys_ipl_ccw_loadparm_attr.attr, 481 &sys_ipl_vm_parm_attr.attr, 482 NULL, 483}; 484 485static struct attribute *ipl_ccw_attrs_lpar[] = { 486 &sys_ipl_type_attr.attr, 487 &sys_ipl_device_attr.attr, 488 &sys_ipl_ccw_loadparm_attr.attr, 489 NULL, 490}; 491 492static struct attribute_group ipl_ccw_attr_group_vm = { 493 .attrs = ipl_ccw_attrs_vm, 494}; 495 496static struct attribute_group ipl_ccw_attr_group_lpar = { 497 .attrs = ipl_ccw_attrs_lpar 498}; 499 500/* NSS ipl device attributes */ 501 502DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name); 503 504static struct attribute *ipl_nss_attrs[] = { 505 &sys_ipl_type_attr.attr, 506 &sys_ipl_nss_name_attr.attr, 507 &sys_ipl_ccw_loadparm_attr.attr, 508 &sys_ipl_vm_parm_attr.attr, 509 NULL, 510}; 511 512static struct attribute_group ipl_nss_attr_group = { 513 .attrs = ipl_nss_attrs, 514}; 515 516/* UNKNOWN ipl device attributes */ 517 518static struct attribute *ipl_unknown_attrs[] = { 519 &sys_ipl_type_attr.attr, 520 NULL, 521}; 522 523static struct attribute_group ipl_unknown_attr_group = { 524 .attrs = ipl_unknown_attrs, 525}; 526 527static struct kset *ipl_kset; 528 529static void __ipl_run(void *unused) 530{ 531 diag308(DIAG308_IPL, NULL); 532 if (MACHINE_IS_VM) 533 __cpcmd("IPL", NULL, 0, NULL); 534 else if (ipl_info.type == IPL_TYPE_CCW) 535 reipl_ccw_dev(&ipl_info.data.ccw.dev_id); 536} 537 538static void ipl_run(struct shutdown_trigger *trigger) 539{ 540 smp_call_ipl_cpu(__ipl_run, NULL); 541} 542 543static int __init ipl_init(void) 544{ 545 int rc; 546 547 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj); 548 if (!ipl_kset) { 549 rc = -ENOMEM; 550 goto out; 551 } 552 switch (ipl_info.type) { 553 case IPL_TYPE_CCW: 554 if (MACHINE_IS_VM) 555 rc = sysfs_create_group(&ipl_kset->kobj, 556 &ipl_ccw_attr_group_vm); 557 else 558 rc = sysfs_create_group(&ipl_kset->kobj, 559 &ipl_ccw_attr_group_lpar); 560 break; 561 case IPL_TYPE_FCP: 562 case IPL_TYPE_FCP_DUMP: 563 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group); 564 break; 565 case IPL_TYPE_NSS: 566 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group); 567 break; 568 default: 569 rc = sysfs_create_group(&ipl_kset->kobj, 570 &ipl_unknown_attr_group); 571 break; 572 } 573out: 574 if (rc) 575 panic("ipl_init failed: rc = %i\n", rc); 576 577 return 0; 578} 579 580static struct shutdown_action __refdata ipl_action = { 581 .name = SHUTDOWN_ACTION_IPL_STR, 582 .fn = ipl_run, 583 .init = ipl_init, 584}; 585 586/* 587 * reipl shutdown action: Reboot Linux on shutdown. 588 */ 589 590/* VM IPL PARM attributes */ 591static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb, 592 char *page) 593{ 594 char vmparm[DIAG308_VMPARM_SIZE + 1] = {}; 595 596 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb); 597 return sprintf(page, "%s\n", vmparm); 598} 599 600static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb, 601 size_t vmparm_max, 602 const char *buf, size_t len) 603{ 604 int i, ip_len; 605 606 /* ignore trailing newline */ 607 ip_len = len; 608 if ((len > 0) && (buf[len - 1] == '\n')) 609 ip_len--; 610 611 if (ip_len > vmparm_max) 612 return -EINVAL; 613 614 /* parm is used to store kernel options, check for common chars */ 615 for (i = 0; i < ip_len; i++) 616 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i]))) 617 return -EINVAL; 618 619 memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE); 620 ipb->ipl_info.ccw.vm_parm_len = ip_len; 621 if (ip_len > 0) { 622 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID; 623 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len); 624 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len); 625 } else { 626 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID; 627 } 628 629 return len; 630} 631 632/* NSS wrapper */ 633static ssize_t reipl_nss_vmparm_show(struct kobject *kobj, 634 struct kobj_attribute *attr, char *page) 635{ 636 return reipl_generic_vmparm_show(reipl_block_nss, page); 637} 638 639static ssize_t reipl_nss_vmparm_store(struct kobject *kobj, 640 struct kobj_attribute *attr, 641 const char *buf, size_t len) 642{ 643 return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len); 644} 645 646/* CCW wrapper */ 647static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj, 648 struct kobj_attribute *attr, char *page) 649{ 650 return reipl_generic_vmparm_show(reipl_block_ccw, page); 651} 652 653static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj, 654 struct kobj_attribute *attr, 655 const char *buf, size_t len) 656{ 657 return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len); 658} 659 660static struct kobj_attribute sys_reipl_nss_vmparm_attr = 661 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show, 662 reipl_nss_vmparm_store); 663static struct kobj_attribute sys_reipl_ccw_vmparm_attr = 664 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show, 665 reipl_ccw_vmparm_store); 666 667/* FCP reipl device attributes */ 668 669static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj, 670 struct bin_attribute *attr, 671 char *buf, loff_t off, size_t count) 672{ 673 size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len; 674 void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data; 675 676 return memory_read_from_buffer(buf, count, &off, scp_data, size); 677} 678 679static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj, 680 struct bin_attribute *attr, 681 char *buf, loff_t off, size_t count) 682{ 683 size_t padding; 684 size_t scpdata_len; 685 686 if (off < 0) 687 return -EINVAL; 688 689 if (off >= DIAG308_SCPDATA_SIZE) 690 return -ENOSPC; 691 692 if (count > DIAG308_SCPDATA_SIZE - off) 693 count = DIAG308_SCPDATA_SIZE - off; 694 695 memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf + off, count); 696 scpdata_len = off + count; 697 698 if (scpdata_len % 8) { 699 padding = 8 - (scpdata_len % 8); 700 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len, 701 0, padding); 702 scpdata_len += padding; 703 } 704 705 reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len; 706 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len; 707 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len; 708 709 return count; 710} 711static struct bin_attribute sys_reipl_fcp_scp_data_attr = 712 __BIN_ATTR(scp_data, (S_IRUGO | S_IWUSR), reipl_fcp_scpdata_read, 713 reipl_fcp_scpdata_write, PAGE_SIZE); 714 715static struct bin_attribute *reipl_fcp_bin_attrs[] = { 716 &sys_reipl_fcp_scp_data_attr, 717 NULL, 718}; 719 720DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n", 721 reipl_block_fcp->ipl_info.fcp.wwpn); 722DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n", 723 reipl_block_fcp->ipl_info.fcp.lun); 724DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n", 725 reipl_block_fcp->ipl_info.fcp.bootprog); 726DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n", 727 reipl_block_fcp->ipl_info.fcp.br_lba); 728DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n", 729 reipl_block_fcp->ipl_info.fcp.devno); 730 731static void reipl_get_ascii_loadparm(char *loadparm, 732 struct ipl_parameter_block *ibp) 733{ 734 memcpy(loadparm, ibp->hdr.loadparm, LOADPARM_LEN); 735 EBCASC(loadparm, LOADPARM_LEN); 736 loadparm[LOADPARM_LEN] = 0; 737 strim(loadparm); 738} 739 740static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb, 741 char *page) 742{ 743 char buf[LOADPARM_LEN + 1]; 744 745 reipl_get_ascii_loadparm(buf, ipb); 746 return sprintf(page, "%s\n", buf); 747} 748 749static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb, 750 const char *buf, size_t len) 751{ 752 int i, lp_len; 753 754 /* ignore trailing newline */ 755 lp_len = len; 756 if ((len > 0) && (buf[len - 1] == '\n')) 757 lp_len--; 758 /* loadparm can have max 8 characters and must not start with a blank */ 759 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' '))) 760 return -EINVAL; 761 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */ 762 for (i = 0; i < lp_len; i++) { 763 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') || 764 (buf[i] == '.')) 765 continue; 766 return -EINVAL; 767 } 768 /* initialize loadparm with blanks */ 769 memset(ipb->hdr.loadparm, ' ', LOADPARM_LEN); 770 /* copy and convert to ebcdic */ 771 memcpy(ipb->hdr.loadparm, buf, lp_len); 772 ASCEBC(ipb->hdr.loadparm, LOADPARM_LEN); 773 return len; 774} 775 776/* FCP wrapper */ 777static ssize_t reipl_fcp_loadparm_show(struct kobject *kobj, 778 struct kobj_attribute *attr, char *page) 779{ 780 return reipl_generic_loadparm_show(reipl_block_fcp, page); 781} 782 783static ssize_t reipl_fcp_loadparm_store(struct kobject *kobj, 784 struct kobj_attribute *attr, 785 const char *buf, size_t len) 786{ 787 return reipl_generic_loadparm_store(reipl_block_fcp, buf, len); 788} 789 790static struct kobj_attribute sys_reipl_fcp_loadparm_attr = 791 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_fcp_loadparm_show, 792 reipl_fcp_loadparm_store); 793 794static struct attribute *reipl_fcp_attrs[] = { 795 &sys_reipl_fcp_device_attr.attr, 796 &sys_reipl_fcp_wwpn_attr.attr, 797 &sys_reipl_fcp_lun_attr.attr, 798 &sys_reipl_fcp_bootprog_attr.attr, 799 &sys_reipl_fcp_br_lba_attr.attr, 800 &sys_reipl_fcp_loadparm_attr.attr, 801 NULL, 802}; 803 804static struct attribute_group reipl_fcp_attr_group = { 805 .attrs = reipl_fcp_attrs, 806 .bin_attrs = reipl_fcp_bin_attrs, 807}; 808 809/* CCW reipl device attributes */ 810 811DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n", 812 reipl_block_ccw->ipl_info.ccw.devno); 813 814/* NSS wrapper */ 815static ssize_t reipl_nss_loadparm_show(struct kobject *kobj, 816 struct kobj_attribute *attr, char *page) 817{ 818 return reipl_generic_loadparm_show(reipl_block_nss, page); 819} 820 821static ssize_t reipl_nss_loadparm_store(struct kobject *kobj, 822 struct kobj_attribute *attr, 823 const char *buf, size_t len) 824{ 825 return reipl_generic_loadparm_store(reipl_block_nss, buf, len); 826} 827 828/* CCW wrapper */ 829static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj, 830 struct kobj_attribute *attr, char *page) 831{ 832 return reipl_generic_loadparm_show(reipl_block_ccw, page); 833} 834 835static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj, 836 struct kobj_attribute *attr, 837 const char *buf, size_t len) 838{ 839 return reipl_generic_loadparm_store(reipl_block_ccw, buf, len); 840} 841 842static struct kobj_attribute sys_reipl_ccw_loadparm_attr = 843 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show, 844 reipl_ccw_loadparm_store); 845 846static struct attribute *reipl_ccw_attrs_vm[] = { 847 &sys_reipl_ccw_device_attr.attr, 848 &sys_reipl_ccw_loadparm_attr.attr, 849 &sys_reipl_ccw_vmparm_attr.attr, 850 NULL, 851}; 852 853static struct attribute *reipl_ccw_attrs_lpar[] = { 854 &sys_reipl_ccw_device_attr.attr, 855 &sys_reipl_ccw_loadparm_attr.attr, 856 NULL, 857}; 858 859static struct attribute_group reipl_ccw_attr_group_vm = { 860 .name = IPL_CCW_STR, 861 .attrs = reipl_ccw_attrs_vm, 862}; 863 864static struct attribute_group reipl_ccw_attr_group_lpar = { 865 .name = IPL_CCW_STR, 866 .attrs = reipl_ccw_attrs_lpar, 867}; 868 869 870/* NSS reipl device attributes */ 871static void reipl_get_ascii_nss_name(char *dst, 872 struct ipl_parameter_block *ipb) 873{ 874 memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE); 875 EBCASC(dst, NSS_NAME_SIZE); 876 dst[NSS_NAME_SIZE] = 0; 877} 878 879static ssize_t reipl_nss_name_show(struct kobject *kobj, 880 struct kobj_attribute *attr, char *page) 881{ 882 char nss_name[NSS_NAME_SIZE + 1] = {}; 883 884 reipl_get_ascii_nss_name(nss_name, reipl_block_nss); 885 return sprintf(page, "%s\n", nss_name); 886} 887 888static ssize_t reipl_nss_name_store(struct kobject *kobj, 889 struct kobj_attribute *attr, 890 const char *buf, size_t len) 891{ 892 int nss_len; 893 894 /* ignore trailing newline */ 895 nss_len = len; 896 if ((len > 0) && (buf[len - 1] == '\n')) 897 nss_len--; 898 899 if (nss_len > NSS_NAME_SIZE) 900 return -EINVAL; 901 902 memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE); 903 if (nss_len > 0) { 904 reipl_block_nss->ipl_info.ccw.vm_flags |= 905 DIAG308_VM_FLAGS_NSS_VALID; 906 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len); 907 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len); 908 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len); 909 } else { 910 reipl_block_nss->ipl_info.ccw.vm_flags &= 911 ~DIAG308_VM_FLAGS_NSS_VALID; 912 } 913 914 return len; 915} 916 917static struct kobj_attribute sys_reipl_nss_name_attr = 918 __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show, 919 reipl_nss_name_store); 920 921static struct kobj_attribute sys_reipl_nss_loadparm_attr = 922 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show, 923 reipl_nss_loadparm_store); 924 925static struct attribute *reipl_nss_attrs[] = { 926 &sys_reipl_nss_name_attr.attr, 927 &sys_reipl_nss_loadparm_attr.attr, 928 &sys_reipl_nss_vmparm_attr.attr, 929 NULL, 930}; 931 932static struct attribute_group reipl_nss_attr_group = { 933 .name = IPL_NSS_STR, 934 .attrs = reipl_nss_attrs, 935}; 936 937static void set_reipl_block_actual(struct ipl_parameter_block *reipl_block) 938{ 939 reipl_block_actual = reipl_block; 940 os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual, 941 reipl_block->hdr.len); 942} 943 944/* reipl type */ 945 946static int reipl_set_type(enum ipl_type type) 947{ 948 if (!(reipl_capabilities & type)) 949 return -EINVAL; 950 951 switch(type) { 952 case IPL_TYPE_CCW: 953 if (diag308_set_works) 954 reipl_method = REIPL_METHOD_CCW_DIAG; 955 else if (MACHINE_IS_VM) 956 reipl_method = REIPL_METHOD_CCW_VM; 957 else 958 reipl_method = REIPL_METHOD_CCW_CIO; 959 set_reipl_block_actual(reipl_block_ccw); 960 break; 961 case IPL_TYPE_FCP: 962 if (diag308_set_works) 963 reipl_method = REIPL_METHOD_FCP_RW_DIAG; 964 else if (MACHINE_IS_VM) 965 reipl_method = REIPL_METHOD_FCP_RO_VM; 966 else 967 reipl_method = REIPL_METHOD_FCP_RO_DIAG; 968 set_reipl_block_actual(reipl_block_fcp); 969 break; 970 case IPL_TYPE_FCP_DUMP: 971 reipl_method = REIPL_METHOD_FCP_DUMP; 972 break; 973 case IPL_TYPE_NSS: 974 if (diag308_set_works) 975 reipl_method = REIPL_METHOD_NSS_DIAG; 976 else 977 reipl_method = REIPL_METHOD_NSS; 978 set_reipl_block_actual(reipl_block_nss); 979 break; 980 case IPL_TYPE_UNKNOWN: 981 reipl_method = REIPL_METHOD_DEFAULT; 982 break; 983 default: 984 BUG(); 985 } 986 reipl_type = type; 987 return 0; 988} 989 990static ssize_t reipl_type_show(struct kobject *kobj, 991 struct kobj_attribute *attr, char *page) 992{ 993 return sprintf(page, "%s\n", ipl_type_str(reipl_type)); 994} 995 996static ssize_t reipl_type_store(struct kobject *kobj, 997 struct kobj_attribute *attr, 998 const char *buf, size_t len) 999{ 1000 int rc = -EINVAL; 1001 1002 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0) 1003 rc = reipl_set_type(IPL_TYPE_CCW); 1004 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0) 1005 rc = reipl_set_type(IPL_TYPE_FCP); 1006 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0) 1007 rc = reipl_set_type(IPL_TYPE_NSS); 1008 return (rc != 0) ? rc : len; 1009} 1010 1011static struct kobj_attribute reipl_type_attr = 1012 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store); 1013 1014static struct kset *reipl_kset; 1015static struct kset *reipl_fcp_kset; 1016 1017static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb, 1018 const enum ipl_method m) 1019{ 1020 char loadparm[LOADPARM_LEN + 1] = {}; 1021 char vmparm[DIAG308_VMPARM_SIZE + 1] = {}; 1022 char nss_name[NSS_NAME_SIZE + 1] = {}; 1023 size_t pos = 0; 1024 1025 reipl_get_ascii_loadparm(loadparm, ipb); 1026 reipl_get_ascii_nss_name(nss_name, ipb); 1027 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb); 1028 1029 switch (m) { 1030 case REIPL_METHOD_CCW_VM: 1031 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno); 1032 break; 1033 case REIPL_METHOD_NSS: 1034 pos = sprintf(dst, "IPL %s", nss_name); 1035 break; 1036 default: 1037 break; 1038 } 1039 if (strlen(loadparm) > 0) 1040 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm); 1041 if (strlen(vmparm) > 0) 1042 sprintf(dst + pos, " PARM %s", vmparm); 1043} 1044 1045static void __reipl_run(void *unused) 1046{ 1047 struct ccw_dev_id devid; 1048 static char buf[128]; 1049 1050 switch (reipl_method) { 1051 case REIPL_METHOD_CCW_CIO: 1052 devid.devno = reipl_block_ccw->ipl_info.ccw.devno; 1053 devid.ssid = 0; 1054 reipl_ccw_dev(&devid); 1055 break; 1056 case REIPL_METHOD_CCW_VM: 1057 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM); 1058 __cpcmd(buf, NULL, 0, NULL); 1059 break; 1060 case REIPL_METHOD_CCW_DIAG: 1061 diag308(DIAG308_SET, reipl_block_ccw); 1062 diag308(DIAG308_IPL, NULL); 1063 break; 1064 case REIPL_METHOD_FCP_RW_DIAG: 1065 diag308(DIAG308_SET, reipl_block_fcp); 1066 diag308(DIAG308_IPL, NULL); 1067 break; 1068 case REIPL_METHOD_FCP_RO_DIAG: 1069 diag308(DIAG308_IPL, NULL); 1070 break; 1071 case REIPL_METHOD_FCP_RO_VM: 1072 __cpcmd("IPL", NULL, 0, NULL); 1073 break; 1074 case REIPL_METHOD_NSS_DIAG: 1075 diag308(DIAG308_SET, reipl_block_nss); 1076 diag308(DIAG308_IPL, NULL); 1077 break; 1078 case REIPL_METHOD_NSS: 1079 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS); 1080 __cpcmd(buf, NULL, 0, NULL); 1081 break; 1082 case REIPL_METHOD_DEFAULT: 1083 if (MACHINE_IS_VM) 1084 __cpcmd("IPL", NULL, 0, NULL); 1085 diag308(DIAG308_IPL, NULL); 1086 break; 1087 case REIPL_METHOD_FCP_DUMP: 1088 break; 1089 } 1090 disabled_wait((unsigned long) __builtin_return_address(0)); 1091} 1092 1093static void reipl_run(struct shutdown_trigger *trigger) 1094{ 1095 smp_call_ipl_cpu(__reipl_run, NULL); 1096} 1097 1098static void reipl_block_ccw_init(struct ipl_parameter_block *ipb) 1099{ 1100 ipb->hdr.len = IPL_PARM_BLK_CCW_LEN; 1101 ipb->hdr.version = IPL_PARM_BLOCK_VERSION; 1102 ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN; 1103 ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW; 1104} 1105 1106static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb) 1107{ 1108 /* LOADPARM */ 1109 /* check if read scp info worked and set loadparm */ 1110 if (sclp_ipl_info.is_valid) 1111 memcpy(ipb->hdr.loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN); 1112 else 1113 /* read scp info failed: set empty loadparm (EBCDIC blanks) */ 1114 memset(ipb->hdr.loadparm, 0x40, LOADPARM_LEN); 1115 ipb->hdr.flags = DIAG308_FLAGS_LP_VALID; 1116 1117 /* VM PARM */ 1118 if (MACHINE_IS_VM && diag308_set_works && 1119 (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) { 1120 1121 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID; 1122 ipb->ipl_info.ccw.vm_parm_len = 1123 ipl_block.ipl_info.ccw.vm_parm_len; 1124 memcpy(ipb->ipl_info.ccw.vm_parm, 1125 ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE); 1126 } 1127} 1128 1129static int __init reipl_nss_init(void) 1130{ 1131 int rc; 1132 1133 if (!MACHINE_IS_VM) 1134 return 0; 1135 1136 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL); 1137 if (!reipl_block_nss) 1138 return -ENOMEM; 1139 1140 if (!diag308_set_works) 1141 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO; 1142 1143 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group); 1144 if (rc) 1145 return rc; 1146 1147 reipl_block_ccw_init(reipl_block_nss); 1148 if (ipl_info.type == IPL_TYPE_NSS) { 1149 memset(reipl_block_nss->ipl_info.ccw.nss_name, 1150 ' ', NSS_NAME_SIZE); 1151 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, 1152 kernel_nss_name, strlen(kernel_nss_name)); 1153 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE); 1154 reipl_block_nss->ipl_info.ccw.vm_flags |= 1155 DIAG308_VM_FLAGS_NSS_VALID; 1156 1157 reipl_block_ccw_fill_parms(reipl_block_nss); 1158 } 1159 1160 reipl_capabilities |= IPL_TYPE_NSS; 1161 return 0; 1162} 1163 1164static int __init reipl_ccw_init(void) 1165{ 1166 int rc; 1167 1168 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL); 1169 if (!reipl_block_ccw) 1170 return -ENOMEM; 1171 1172 if (MACHINE_IS_VM) { 1173 if (!diag308_set_works) 1174 sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO; 1175 rc = sysfs_create_group(&reipl_kset->kobj, 1176 &reipl_ccw_attr_group_vm); 1177 } else { 1178 if(!diag308_set_works) 1179 sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO; 1180 rc = sysfs_create_group(&reipl_kset->kobj, 1181 &reipl_ccw_attr_group_lpar); 1182 } 1183 if (rc) 1184 return rc; 1185 1186 reipl_block_ccw_init(reipl_block_ccw); 1187 if (ipl_info.type == IPL_TYPE_CCW) { 1188 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno; 1189 reipl_block_ccw_fill_parms(reipl_block_ccw); 1190 } 1191 1192 reipl_capabilities |= IPL_TYPE_CCW; 1193 return 0; 1194} 1195 1196static int __init reipl_fcp_init(void) 1197{ 1198 int rc; 1199 1200 if (!diag308_set_works) { 1201 if (ipl_info.type == IPL_TYPE_FCP) { 1202 make_attrs_ro(reipl_fcp_attrs); 1203 sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO; 1204 } else 1205 return 0; 1206 } 1207 1208 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL); 1209 if (!reipl_block_fcp) 1210 return -ENOMEM; 1211 1212 /* sysfs: create fcp kset for mixing attr group and bin attrs */ 1213 reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL, 1214 &reipl_kset->kobj); 1215 if (!reipl_fcp_kset) { 1216 free_page((unsigned long) reipl_block_fcp); 1217 return -ENOMEM; 1218 } 1219 1220 rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group); 1221 if (rc) { 1222 kset_unregister(reipl_fcp_kset); 1223 free_page((unsigned long) reipl_block_fcp); 1224 return rc; 1225 } 1226 1227 if (ipl_info.type == IPL_TYPE_FCP) { 1228 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE); 1229 /* 1230 * Fix loadparm: There are systems where the (SCSI) LOADPARM 1231 * is invalid in the SCSI IPL parameter block, so take it 1232 * always from sclp_ipl_info. 1233 */ 1234 memcpy(reipl_block_fcp->hdr.loadparm, sclp_ipl_info.loadparm, 1235 LOADPARM_LEN); 1236 } else { 1237 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN; 1238 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION; 1239 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN; 1240 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP; 1241 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL; 1242 } 1243 reipl_capabilities |= IPL_TYPE_FCP; 1244 return 0; 1245} 1246 1247static int __init reipl_type_init(void) 1248{ 1249 enum ipl_type reipl_type = ipl_info.type; 1250 struct ipl_parameter_block *reipl_block; 1251 unsigned long size; 1252 1253 reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size); 1254 if (!reipl_block) 1255 goto out; 1256 /* 1257 * If we have an OS info reipl block, this will be used 1258 */ 1259 if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_FCP) { 1260 memcpy(reipl_block_fcp, reipl_block, size); 1261 reipl_type = IPL_TYPE_FCP; 1262 } else if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_CCW) { 1263 memcpy(reipl_block_ccw, reipl_block, size); 1264 reipl_type = IPL_TYPE_CCW; 1265 } 1266out: 1267 return reipl_set_type(reipl_type); 1268} 1269 1270static int __init reipl_init(void) 1271{ 1272 int rc; 1273 1274 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj); 1275 if (!reipl_kset) 1276 return -ENOMEM; 1277 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr); 1278 if (rc) { 1279 kset_unregister(reipl_kset); 1280 return rc; 1281 } 1282 rc = reipl_ccw_init(); 1283 if (rc) 1284 return rc; 1285 rc = reipl_fcp_init(); 1286 if (rc) 1287 return rc; 1288 rc = reipl_nss_init(); 1289 if (rc) 1290 return rc; 1291 return reipl_type_init(); 1292} 1293 1294static struct shutdown_action __refdata reipl_action = { 1295 .name = SHUTDOWN_ACTION_REIPL_STR, 1296 .fn = reipl_run, 1297 .init = reipl_init, 1298}; 1299 1300/* 1301 * dump shutdown action: Dump Linux on shutdown. 1302 */ 1303 1304/* FCP dump device attributes */ 1305 1306DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n", 1307 dump_block_fcp->ipl_info.fcp.wwpn); 1308DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n", 1309 dump_block_fcp->ipl_info.fcp.lun); 1310DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n", 1311 dump_block_fcp->ipl_info.fcp.bootprog); 1312DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n", 1313 dump_block_fcp->ipl_info.fcp.br_lba); 1314DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n", 1315 dump_block_fcp->ipl_info.fcp.devno); 1316 1317static struct attribute *dump_fcp_attrs[] = { 1318 &sys_dump_fcp_device_attr.attr, 1319 &sys_dump_fcp_wwpn_attr.attr, 1320 &sys_dump_fcp_lun_attr.attr, 1321 &sys_dump_fcp_bootprog_attr.attr, 1322 &sys_dump_fcp_br_lba_attr.attr, 1323 NULL, 1324}; 1325 1326static struct attribute_group dump_fcp_attr_group = { 1327 .name = IPL_FCP_STR, 1328 .attrs = dump_fcp_attrs, 1329}; 1330 1331/* CCW dump device attributes */ 1332 1333DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n", 1334 dump_block_ccw->ipl_info.ccw.devno); 1335 1336static struct attribute *dump_ccw_attrs[] = { 1337 &sys_dump_ccw_device_attr.attr, 1338 NULL, 1339}; 1340 1341static struct attribute_group dump_ccw_attr_group = { 1342 .name = IPL_CCW_STR, 1343 .attrs = dump_ccw_attrs, 1344}; 1345 1346/* dump type */ 1347 1348static int dump_set_type(enum dump_type type) 1349{ 1350 if (!(dump_capabilities & type)) 1351 return -EINVAL; 1352 switch (type) { 1353 case DUMP_TYPE_CCW: 1354 if (diag308_set_works) 1355 dump_method = DUMP_METHOD_CCW_DIAG; 1356 else if (MACHINE_IS_VM) 1357 dump_method = DUMP_METHOD_CCW_VM; 1358 else 1359 dump_method = DUMP_METHOD_CCW_CIO; 1360 break; 1361 case DUMP_TYPE_FCP: 1362 dump_method = DUMP_METHOD_FCP_DIAG; 1363 break; 1364 default: 1365 dump_method = DUMP_METHOD_NONE; 1366 } 1367 dump_type = type; 1368 return 0; 1369} 1370 1371static ssize_t dump_type_show(struct kobject *kobj, 1372 struct kobj_attribute *attr, char *page) 1373{ 1374 return sprintf(page, "%s\n", dump_type_str(dump_type)); 1375} 1376 1377static ssize_t dump_type_store(struct kobject *kobj, 1378 struct kobj_attribute *attr, 1379 const char *buf, size_t len) 1380{ 1381 int rc = -EINVAL; 1382 1383 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0) 1384 rc = dump_set_type(DUMP_TYPE_NONE); 1385 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0) 1386 rc = dump_set_type(DUMP_TYPE_CCW); 1387 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0) 1388 rc = dump_set_type(DUMP_TYPE_FCP); 1389 return (rc != 0) ? rc : len; 1390} 1391 1392static struct kobj_attribute dump_type_attr = 1393 __ATTR(dump_type, 0644, dump_type_show, dump_type_store); 1394 1395static struct kset *dump_kset; 1396 1397static void diag308_dump(void *dump_block) 1398{ 1399 diag308(DIAG308_SET, dump_block); 1400 while (1) { 1401 if (diag308(DIAG308_DUMP, NULL) != 0x302) 1402 break; 1403 udelay_simple(USEC_PER_SEC); 1404 } 1405} 1406 1407static void __dump_run(void *unused) 1408{ 1409 struct ccw_dev_id devid; 1410 static char buf[100]; 1411 1412 switch (dump_method) { 1413 case DUMP_METHOD_CCW_CIO: 1414 devid.devno = dump_block_ccw->ipl_info.ccw.devno; 1415 devid.ssid = 0; 1416 reipl_ccw_dev(&devid); 1417 break; 1418 case DUMP_METHOD_CCW_VM: 1419 sprintf(buf, "STORE STATUS"); 1420 __cpcmd(buf, NULL, 0, NULL); 1421 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno); 1422 __cpcmd(buf, NULL, 0, NULL); 1423 break; 1424 case DUMP_METHOD_CCW_DIAG: 1425 diag308_dump(dump_block_ccw); 1426 break; 1427 case DUMP_METHOD_FCP_DIAG: 1428 diag308_dump(dump_block_fcp); 1429 break; 1430 default: 1431 break; 1432 } 1433} 1434 1435static void dump_run(struct shutdown_trigger *trigger) 1436{ 1437 if (dump_method == DUMP_METHOD_NONE) 1438 return; 1439 smp_send_stop(); 1440 smp_call_ipl_cpu(__dump_run, NULL); 1441} 1442 1443static int __init dump_ccw_init(void) 1444{ 1445 int rc; 1446 1447 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL); 1448 if (!dump_block_ccw) 1449 return -ENOMEM; 1450 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group); 1451 if (rc) { 1452 free_page((unsigned long)dump_block_ccw); 1453 return rc; 1454 } 1455 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN; 1456 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION; 1457 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN; 1458 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW; 1459 dump_capabilities |= DUMP_TYPE_CCW; 1460 return 0; 1461} 1462 1463static int __init dump_fcp_init(void) 1464{ 1465 int rc; 1466 1467 if (!sclp_ipl_info.has_dump) 1468 return 0; /* LDIPL DUMP is not installed */ 1469 if (!diag308_set_works) 1470 return 0; 1471 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL); 1472 if (!dump_block_fcp) 1473 return -ENOMEM; 1474 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group); 1475 if (rc) { 1476 free_page((unsigned long)dump_block_fcp); 1477 return rc; 1478 } 1479 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN; 1480 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION; 1481 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN; 1482 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP; 1483 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP; 1484 dump_capabilities |= DUMP_TYPE_FCP; 1485 return 0; 1486} 1487 1488static int __init dump_init(void) 1489{ 1490 int rc; 1491 1492 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj); 1493 if (!dump_kset) 1494 return -ENOMEM; 1495 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr); 1496 if (rc) { 1497 kset_unregister(dump_kset); 1498 return rc; 1499 } 1500 rc = dump_ccw_init(); 1501 if (rc) 1502 return rc; 1503 rc = dump_fcp_init(); 1504 if (rc) 1505 return rc; 1506 dump_set_type(DUMP_TYPE_NONE); 1507 return 0; 1508} 1509 1510static struct shutdown_action __refdata dump_action = { 1511 .name = SHUTDOWN_ACTION_DUMP_STR, 1512 .fn = dump_run, 1513 .init = dump_init, 1514}; 1515 1516static void dump_reipl_run(struct shutdown_trigger *trigger) 1517{ 1518 unsigned long ipib = (unsigned long) reipl_block_actual; 1519 unsigned int csum; 1520 1521 csum = csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0); 1522 mem_assign_absolute(S390_lowcore.ipib, ipib); 1523 mem_assign_absolute(S390_lowcore.ipib_checksum, csum); 1524 dump_run(trigger); 1525} 1526 1527static int __init dump_reipl_init(void) 1528{ 1529 if (!diag308_set_works) 1530 return -EOPNOTSUPP; 1531 else 1532 return 0; 1533} 1534 1535static struct shutdown_action __refdata dump_reipl_action = { 1536 .name = SHUTDOWN_ACTION_DUMP_REIPL_STR, 1537 .fn = dump_reipl_run, 1538 .init = dump_reipl_init, 1539}; 1540 1541/* 1542 * vmcmd shutdown action: Trigger vm command on shutdown. 1543 */ 1544 1545static char vmcmd_on_reboot[128]; 1546static char vmcmd_on_panic[128]; 1547static char vmcmd_on_halt[128]; 1548static char vmcmd_on_poff[128]; 1549static char vmcmd_on_restart[128]; 1550 1551DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot); 1552DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic); 1553DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt); 1554DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff); 1555DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart); 1556 1557static struct attribute *vmcmd_attrs[] = { 1558 &sys_vmcmd_on_reboot_attr.attr, 1559 &sys_vmcmd_on_panic_attr.attr, 1560 &sys_vmcmd_on_halt_attr.attr, 1561 &sys_vmcmd_on_poff_attr.attr, 1562 &sys_vmcmd_on_restart_attr.attr, 1563 NULL, 1564}; 1565 1566static struct attribute_group vmcmd_attr_group = { 1567 .attrs = vmcmd_attrs, 1568}; 1569 1570static struct kset *vmcmd_kset; 1571 1572static void vmcmd_run(struct shutdown_trigger *trigger) 1573{ 1574 char *cmd; 1575 1576 if (strcmp(trigger->name, ON_REIPL_STR) == 0) 1577 cmd = vmcmd_on_reboot; 1578 else if (strcmp(trigger->name, ON_PANIC_STR) == 0) 1579 cmd = vmcmd_on_panic; 1580 else if (strcmp(trigger->name, ON_HALT_STR) == 0) 1581 cmd = vmcmd_on_halt; 1582 else if (strcmp(trigger->name, ON_POFF_STR) == 0) 1583 cmd = vmcmd_on_poff; 1584 else if (strcmp(trigger->name, ON_RESTART_STR) == 0) 1585 cmd = vmcmd_on_restart; 1586 else 1587 return; 1588 1589 if (strlen(cmd) == 0) 1590 return; 1591 __cpcmd(cmd, NULL, 0, NULL); 1592} 1593 1594static int vmcmd_init(void) 1595{ 1596 if (!MACHINE_IS_VM) 1597 return -EOPNOTSUPP; 1598 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj); 1599 if (!vmcmd_kset) 1600 return -ENOMEM; 1601 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group); 1602} 1603 1604static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR, 1605 vmcmd_run, vmcmd_init}; 1606 1607/* 1608 * stop shutdown action: Stop Linux on shutdown. 1609 */ 1610 1611static void stop_run(struct shutdown_trigger *trigger) 1612{ 1613 if (strcmp(trigger->name, ON_PANIC_STR) == 0 || 1614 strcmp(trigger->name, ON_RESTART_STR) == 0) 1615 disabled_wait((unsigned long) __builtin_return_address(0)); 1616 smp_stop_cpu(); 1617} 1618 1619static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR, 1620 stop_run, NULL}; 1621 1622/* action list */ 1623 1624static struct shutdown_action *shutdown_actions_list[] = { 1625 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action, 1626 &vmcmd_action, &stop_action}; 1627#define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *)) 1628 1629/* 1630 * Trigger section 1631 */ 1632 1633static struct kset *shutdown_actions_kset; 1634 1635static int set_trigger(const char *buf, struct shutdown_trigger *trigger, 1636 size_t len) 1637{ 1638 int i; 1639 1640 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) { 1641 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) { 1642 if (shutdown_actions_list[i]->init_rc) { 1643 return shutdown_actions_list[i]->init_rc; 1644 } else { 1645 trigger->action = shutdown_actions_list[i]; 1646 return len; 1647 } 1648 } 1649 } 1650 return -EINVAL; 1651} 1652 1653/* on reipl */ 1654 1655static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR, 1656 &reipl_action}; 1657 1658static ssize_t on_reboot_show(struct kobject *kobj, 1659 struct kobj_attribute *attr, char *page) 1660{ 1661 return sprintf(page, "%s\n", on_reboot_trigger.action->name); 1662} 1663 1664static ssize_t on_reboot_store(struct kobject *kobj, 1665 struct kobj_attribute *attr, 1666 const char *buf, size_t len) 1667{ 1668 return set_trigger(buf, &on_reboot_trigger, len); 1669} 1670static struct kobj_attribute on_reboot_attr = __ATTR_RW(on_reboot); 1671 1672static void do_machine_restart(char *__unused) 1673{ 1674 smp_send_stop(); 1675 on_reboot_trigger.action->fn(&on_reboot_trigger); 1676 reipl_run(NULL); 1677} 1678void (*_machine_restart)(char *command) = do_machine_restart; 1679 1680/* on panic */ 1681 1682static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action}; 1683 1684static ssize_t on_panic_show(struct kobject *kobj, 1685 struct kobj_attribute *attr, char *page) 1686{ 1687 return sprintf(page, "%s\n", on_panic_trigger.action->name); 1688} 1689 1690static ssize_t on_panic_store(struct kobject *kobj, 1691 struct kobj_attribute *attr, 1692 const char *buf, size_t len) 1693{ 1694 return set_trigger(buf, &on_panic_trigger, len); 1695} 1696static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic); 1697 1698static void do_panic(void) 1699{ 1700 lgr_info_log(); 1701 on_panic_trigger.action->fn(&on_panic_trigger); 1702 stop_run(&on_panic_trigger); 1703} 1704 1705/* on restart */ 1706 1707static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR, 1708 &stop_action}; 1709 1710static ssize_t on_restart_show(struct kobject *kobj, 1711 struct kobj_attribute *attr, char *page) 1712{ 1713 return sprintf(page, "%s\n", on_restart_trigger.action->name); 1714} 1715 1716static ssize_t on_restart_store(struct kobject *kobj, 1717 struct kobj_attribute *attr, 1718 const char *buf, size_t len) 1719{ 1720 return set_trigger(buf, &on_restart_trigger, len); 1721} 1722static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart); 1723 1724static void __do_restart(void *ignore) 1725{ 1726 __arch_local_irq_stosm(0x04); /* enable DAT */ 1727 smp_send_stop(); 1728#ifdef CONFIG_CRASH_DUMP 1729 crash_kexec(NULL); 1730#endif 1731 on_restart_trigger.action->fn(&on_restart_trigger); 1732 stop_run(&on_restart_trigger); 1733} 1734 1735void do_restart(void) 1736{ 1737 tracing_off(); 1738 debug_locks_off(); 1739 lgr_info_log(); 1740 smp_call_online_cpu(__do_restart, NULL); 1741} 1742 1743/* on halt */ 1744 1745static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action}; 1746 1747static ssize_t on_halt_show(struct kobject *kobj, 1748 struct kobj_attribute *attr, char *page) 1749{ 1750 return sprintf(page, "%s\n", on_halt_trigger.action->name); 1751} 1752 1753static ssize_t on_halt_store(struct kobject *kobj, 1754 struct kobj_attribute *attr, 1755 const char *buf, size_t len) 1756{ 1757 return set_trigger(buf, &on_halt_trigger, len); 1758} 1759static struct kobj_attribute on_halt_attr = __ATTR_RW(on_halt); 1760 1761static void do_machine_halt(void) 1762{ 1763 smp_send_stop(); 1764 on_halt_trigger.action->fn(&on_halt_trigger); 1765 stop_run(&on_halt_trigger); 1766} 1767void (*_machine_halt)(void) = do_machine_halt; 1768 1769/* on power off */ 1770 1771static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action}; 1772 1773static ssize_t on_poff_show(struct kobject *kobj, 1774 struct kobj_attribute *attr, char *page) 1775{ 1776 return sprintf(page, "%s\n", on_poff_trigger.action->name); 1777} 1778 1779static ssize_t on_poff_store(struct kobject *kobj, 1780 struct kobj_attribute *attr, 1781 const char *buf, size_t len) 1782{ 1783 return set_trigger(buf, &on_poff_trigger, len); 1784} 1785static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff); 1786 1787static void do_machine_power_off(void) 1788{ 1789 smp_send_stop(); 1790 on_poff_trigger.action->fn(&on_poff_trigger); 1791 stop_run(&on_poff_trigger); 1792} 1793void (*_machine_power_off)(void) = do_machine_power_off; 1794 1795static struct attribute *shutdown_action_attrs[] = { 1796 &on_restart_attr.attr, 1797 &on_reboot_attr.attr, 1798 &on_panic_attr.attr, 1799 &on_halt_attr.attr, 1800 &on_poff_attr.attr, 1801 NULL, 1802}; 1803 1804static struct attribute_group shutdown_action_attr_group = { 1805 .attrs = shutdown_action_attrs, 1806}; 1807 1808static void __init shutdown_triggers_init(void) 1809{ 1810 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL, 1811 firmware_kobj); 1812 if (!shutdown_actions_kset) 1813 goto fail; 1814 if (sysfs_create_group(&shutdown_actions_kset->kobj, 1815 &shutdown_action_attr_group)) 1816 goto fail; 1817 return; 1818fail: 1819 panic("shutdown_triggers_init failed\n"); 1820} 1821 1822static void __init shutdown_actions_init(void) 1823{ 1824 int i; 1825 1826 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) { 1827 if (!shutdown_actions_list[i]->init) 1828 continue; 1829 shutdown_actions_list[i]->init_rc = 1830 shutdown_actions_list[i]->init(); 1831 } 1832} 1833 1834static int __init s390_ipl_init(void) 1835{ 1836 char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40}; 1837 1838 sclp_get_ipl_info(&sclp_ipl_info); 1839 /* 1840 * Fix loadparm: There are systems where the (SCSI) LOADPARM 1841 * returned by read SCP info is invalid (contains EBCDIC blanks) 1842 * when the system has been booted via diag308. In that case we use 1843 * the value from diag308, if available. 1844 * 1845 * There are also systems where diag308 store does not work in 1846 * case the system is booted from HMC. Fortunately in this case 1847 * READ SCP info provides the correct value. 1848 */ 1849 if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 && 1850 diag308_set_works) 1851 memcpy(sclp_ipl_info.loadparm, ipl_block.hdr.loadparm, 1852 LOADPARM_LEN); 1853 shutdown_actions_init(); 1854 shutdown_triggers_init(); 1855 return 0; 1856} 1857 1858__initcall(s390_ipl_init); 1859 1860static void __init strncpy_skip_quote(char *dst, char *src, int n) 1861{ 1862 int sx, dx; 1863 1864 dx = 0; 1865 for (sx = 0; src[sx] != 0; sx++) { 1866 if (src[sx] == '"') 1867 continue; 1868 dst[dx++] = src[sx]; 1869 if (dx >= n) 1870 break; 1871 } 1872} 1873 1874static int __init vmcmd_on_reboot_setup(char *str) 1875{ 1876 if (!MACHINE_IS_VM) 1877 return 1; 1878 strncpy_skip_quote(vmcmd_on_reboot, str, 127); 1879 vmcmd_on_reboot[127] = 0; 1880 on_reboot_trigger.action = &vmcmd_action; 1881 return 1; 1882} 1883__setup("vmreboot=", vmcmd_on_reboot_setup); 1884 1885static int __init vmcmd_on_panic_setup(char *str) 1886{ 1887 if (!MACHINE_IS_VM) 1888 return 1; 1889 strncpy_skip_quote(vmcmd_on_panic, str, 127); 1890 vmcmd_on_panic[127] = 0; 1891 on_panic_trigger.action = &vmcmd_action; 1892 return 1; 1893} 1894__setup("vmpanic=", vmcmd_on_panic_setup); 1895 1896static int __init vmcmd_on_halt_setup(char *str) 1897{ 1898 if (!MACHINE_IS_VM) 1899 return 1; 1900 strncpy_skip_quote(vmcmd_on_halt, str, 127); 1901 vmcmd_on_halt[127] = 0; 1902 on_halt_trigger.action = &vmcmd_action; 1903 return 1; 1904} 1905__setup("vmhalt=", vmcmd_on_halt_setup); 1906 1907static int __init vmcmd_on_poff_setup(char *str) 1908{ 1909 if (!MACHINE_IS_VM) 1910 return 1; 1911 strncpy_skip_quote(vmcmd_on_poff, str, 127); 1912 vmcmd_on_poff[127] = 0; 1913 on_poff_trigger.action = &vmcmd_action; 1914 return 1; 1915} 1916__setup("vmpoff=", vmcmd_on_poff_setup); 1917 1918static int on_panic_notify(struct notifier_block *self, 1919 unsigned long event, void *data) 1920{ 1921 do_panic(); 1922 return NOTIFY_OK; 1923} 1924 1925static struct notifier_block on_panic_nb = { 1926 .notifier_call = on_panic_notify, 1927 .priority = INT_MIN, 1928}; 1929 1930void __init setup_ipl(void) 1931{ 1932 ipl_info.type = get_ipl_type(); 1933 switch (ipl_info.type) { 1934 case IPL_TYPE_CCW: 1935 ipl_info.data.ccw.dev_id.devno = ipl_devno; 1936 ipl_info.data.ccw.dev_id.ssid = 0; 1937 break; 1938 case IPL_TYPE_FCP: 1939 case IPL_TYPE_FCP_DUMP: 1940 ipl_info.data.fcp.dev_id.devno = 1941 IPL_PARMBLOCK_START->ipl_info.fcp.devno; 1942 ipl_info.data.fcp.dev_id.ssid = 0; 1943 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn; 1944 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun; 1945 break; 1946 case IPL_TYPE_NSS: 1947 strncpy(ipl_info.data.nss.name, kernel_nss_name, 1948 sizeof(ipl_info.data.nss.name)); 1949 break; 1950 case IPL_TYPE_UNKNOWN: 1951 /* We have no info to copy */ 1952 break; 1953 } 1954 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb); 1955} 1956 1957void __init ipl_update_parameters(void) 1958{ 1959 int rc; 1960 1961 rc = diag308(DIAG308_STORE, &ipl_block); 1962 if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG)) 1963 diag308_set_works = 1; 1964} 1965 1966void __init ipl_save_parameters(void) 1967{ 1968 struct cio_iplinfo iplinfo; 1969 void *src, *dst; 1970 1971 if (cio_get_iplinfo(&iplinfo)) 1972 return; 1973 1974 ipl_devno = iplinfo.devno; 1975 ipl_flags |= IPL_DEVNO_VALID; 1976 if (!iplinfo.is_qdio) 1977 return; 1978 ipl_flags |= IPL_PARMBLOCK_VALID; 1979 src = (void *)(unsigned long)S390_lowcore.ipl_parmblock_ptr; 1980 dst = (void *)IPL_PARMBLOCK_ORIGIN; 1981 memmove(dst, src, PAGE_SIZE); 1982 S390_lowcore.ipl_parmblock_ptr = IPL_PARMBLOCK_ORIGIN; 1983} 1984 1985static LIST_HEAD(rcall); 1986static DEFINE_MUTEX(rcall_mutex); 1987 1988void register_reset_call(struct reset_call *reset) 1989{ 1990 mutex_lock(&rcall_mutex); 1991 list_add(&reset->list, &rcall); 1992 mutex_unlock(&rcall_mutex); 1993} 1994EXPORT_SYMBOL_GPL(register_reset_call); 1995 1996void unregister_reset_call(struct reset_call *reset) 1997{ 1998 mutex_lock(&rcall_mutex); 1999 list_del(&reset->list); 2000 mutex_unlock(&rcall_mutex); 2001} 2002EXPORT_SYMBOL_GPL(unregister_reset_call); 2003 2004static void do_reset_calls(void) 2005{ 2006 struct reset_call *reset; 2007 2008 if (diag308_set_works) { 2009 diag308_reset(); 2010 return; 2011 } 2012 list_for_each_entry(reset, &rcall, list) 2013 reset->fn(); 2014} 2015 2016u32 dump_prefix_page; 2017 2018void s390_reset_system(void (*fn_pre)(void), 2019 void (*fn_post)(void *), void *data) 2020{ 2021 struct _lowcore *lc; 2022 2023 lc = (struct _lowcore *)(unsigned long) store_prefix(); 2024 2025 /* Stack for interrupt/machine check handler */ 2026 lc->panic_stack = S390_lowcore.panic_stack; 2027 2028 /* Save prefix page address for dump case */ 2029 dump_prefix_page = (u32)(unsigned long) lc; 2030 2031 /* Disable prefixing */ 2032 set_prefix(0); 2033 2034 /* Disable lowcore protection */ 2035 __ctl_clear_bit(0,28); 2036 2037 /* Set new machine check handler */ 2038 S390_lowcore.mcck_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT; 2039 S390_lowcore.mcck_new_psw.addr = 2040 PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler; 2041 2042 /* Set new program check handler */ 2043 S390_lowcore.program_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT; 2044 S390_lowcore.program_new_psw.addr = 2045 PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler; 2046 2047 /* 2048 * Clear subchannel ID and number to signal new kernel that no CCW or 2049 * SCSI IPL has been done (for kexec and kdump) 2050 */ 2051 S390_lowcore.subchannel_id = 0; 2052 S390_lowcore.subchannel_nr = 0; 2053 2054 /* Store status at absolute zero */ 2055 store_status(); 2056 2057 /* Call function before reset */ 2058 if (fn_pre) 2059 fn_pre(); 2060 do_reset_calls(); 2061 /* Call function after reset */ 2062 if (fn_post) 2063 fn_post(data); 2064} 2065