arch/s390/kernel/ipl.c

   1 /*
   2  *    ipl/reipl/dump support for Linux on s390.
   3  *
   4  *    Copyright IBM Corp. 2005, 2012
   5  *    Author(s): Michael Holzheu <[email protected]>
   6  *               Heiko Carstens <[email protected]>
   7  *               Volker Sameske <[email protected]>
   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
  59 struct shutdown_action;
  60 struct 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
  75 struct shutdown_action {
  76         char *name;
  77         void (*fn) (struct shutdown_trigger *trigger);
  78         int (*init) (void);
  79         int init_rc;
  80 };
  81
  82 static 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
  99 enum dump_type {
 100         DUMP_TYPE_NONE  = 1,
 101         DUMP_TYPE_CCW   = 2,
 102         DUMP_TYPE_FCP   = 4,
 103 };
 104
 105 static 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  */
 123 static u16 ipl_devno __attribute__((__section__(".data"))) = 0;
 124 u32 ipl_flags __attribute__((__section__(".data"))) = 0;
 125
 126 enum ipl_method {
 127         REIPL_METHOD_CCW_CIO,
 128         REIPL_METHOD_CCW_DIAG,
 129         REIPL_METHOD_CCW_VM,
 130         REIPL_METHOD_FCP_RO_DIAG,
 131         REIPL_METHOD_FCP_RW_DIAG,
 132         REIPL_METHOD_FCP_RO_VM,
 133         REIPL_METHOD_FCP_DUMP,
 134         REIPL_METHOD_NSS,
 135         REIPL_METHOD_NSS_DIAG,
 136         REIPL_METHOD_DEFAULT,
 137 };
 138
 139 enum dump_method {
 140         DUMP_METHOD_NONE,
 141         DUMP_METHOD_CCW_CIO,
 142         DUMP_METHOD_CCW_DIAG,
 143         DUMP_METHOD_CCW_VM,
 144         DUMP_METHOD_FCP_DIAG,
 145 };
 146
 147 static int diag308_set_works = 0;
 148
 149 static struct ipl_parameter_block ipl_block;
 150
 151 static int reipl_capabilities = IPL_TYPE_UNKNOWN;
 152
 153 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
 154 static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
 155 static struct ipl_parameter_block *reipl_block_fcp;
 156 static struct ipl_parameter_block *reipl_block_ccw;
 157 static struct ipl_parameter_block *reipl_block_nss;
 158 static struct ipl_parameter_block *reipl_block_actual;
 159
 160 static int dump_capabilities = DUMP_TYPE_NONE;
 161 static enum dump_type dump_type = DUMP_TYPE_NONE;
 162 static enum dump_method dump_method = DUMP_METHOD_NONE;
 163 static struct ipl_parameter_block *dump_block_fcp;
 164 static struct ipl_parameter_block *dump_block_ccw;
 165
 166 static struct sclp_ipl_info sclp_ipl_info;
 167
 168 int diag308(unsigned long subcode, void *addr)
 169 {
 170         register unsigned long _addr asm("0") = (unsigned long) addr;
 171         register unsigned long _rc asm("1") = 0;
 172
 173         asm volatile(
 174                 "       diag    %0,%2,0x308\n"
 175                 "0:\n"
 176                 EX_TABLE(0b,0b)
 177                 : "+d" (_addr), "+d" (_rc)
 178                 : "d" (subcode) : "cc", "memory");
 179         return _rc;
 180 }
 181 EXPORT_SYMBOL_GPL(diag308);
 182
 183 /* SYSFS */
 184
 185 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value)             \
 186 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,     \
 187                 struct kobj_attribute *attr,                            \
 188                 char *page)                                             \
 189 {                                                                       \
 190         return sprintf(page, _format, _value);                          \
 191 }                                                                       \
 192 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 193         __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL);
 194
 195 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)   \
 196 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,     \
 197                 struct kobj_attribute *attr,                            \
 198                 char *page)                                             \
 199 {                                                                       \
 200         return sprintf(page, _fmt_out,                                  \
 201                         (unsigned long long) _value);                   \
 202 }                                                                       \
 203 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,    \
 204                 struct kobj_attribute *attr,                            \
 205                 const char *buf, size_t len)                            \
 206 {                                                                       \
 207         unsigned long long value;                                       \
 208         if (sscanf(buf, _fmt_in, &value) != 1)                          \
 209                 return -EINVAL;                                         \
 210         _value = value;                                                 \
 211         return len;                                                     \
 212 }                                                                       \
 213 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 214         __ATTR(_name,(S_IRUGO | S_IWUSR),                               \
 215                         sys_##_prefix##_##_name##_show,                 \
 216                         sys_##_prefix##_##_name##_store);
 217
 218 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
 219 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,     \
 220                 struct kobj_attribute *attr,                            \
 221                 char *page)                                             \
 222 {                                                                       \
 223         return sprintf(page, _fmt_out, _value);                         \
 224 }                                                                       \
 225 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,    \
 226                 struct kobj_attribute *attr,                            \
 227                 const char *buf, size_t len)                            \
 228 {                                                                       \
 229         strncpy(_value, buf, sizeof(_value) - 1);                       \
 230         strim(_value);                                                  \
 231         return len;                                                     \
 232 }                                                                       \
 233 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 234         __ATTR(_name,(S_IRUGO | S_IWUSR),                               \
 235                         sys_##_prefix##_##_name##_show,                 \
 236                         sys_##_prefix##_##_name##_store);
 237
 238 static void make_attrs_ro(struct attribute **attrs)
 239 {
 240         while (*attrs) {
 241                 (*attrs)->mode = S_IRUGO;
 242                 attrs++;
 243         }
 244 }
 245
 246 /*
 247  * ipl section
 248  */
 249
 250 static __init enum ipl_type get_ipl_type(void)
 251 {
 252         struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
 253
 254         if (ipl_flags & IPL_NSS_VALID)
 255                 return IPL_TYPE_NSS;
 256         if (!(ipl_flags & IPL_DEVNO_VALID))
 257                 return IPL_TYPE_UNKNOWN;
 258         if (!(ipl_flags & IPL_PARMBLOCK_VALID))
 259                 return IPL_TYPE_CCW;
 260         if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
 261                 return IPL_TYPE_UNKNOWN;
 262         if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
 263                 return IPL_TYPE_UNKNOWN;
 264         if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
 265                 return IPL_TYPE_FCP_DUMP;
 266         return IPL_TYPE_FCP;
 267 }
 268
 269 struct ipl_info ipl_info;
 270 EXPORT_SYMBOL_GPL(ipl_info);
 271
 272 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
 273                              char *page)
 274 {
 275         return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
 276 }
 277
 278 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
 279
 280 /* VM IPL PARM routines */
 281 static size_t reipl_get_ascii_vmparm(char *dest, size_t size,
 282                                      const struct ipl_parameter_block *ipb)
 283 {
 284         int i;
 285         size_t len;
 286         char has_lowercase = 0;
 287
 288         len = 0;
 289         if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
 290             (ipb->ipl_info.ccw.vm_parm_len > 0)) {
 291
 292                 len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
 293                 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
 294                 /* If at least one character is lowercase, we assume mixed
 295                  * case; otherwise we convert everything to lowercase.
 296                  */
 297                 for (i = 0; i < len; i++)
 298                         if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
 299                             (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
 300                             (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
 301                                 has_lowercase = 1;
 302                                 break;
 303                         }
 304                 if (!has_lowercase)
 305                         EBC_TOLOWER(dest, len);
 306                 EBCASC(dest, len);
 307         }
 308         dest[len] = 0;
 309
 310         return len;
 311 }
 312
 313 size_t append_ipl_vmparm(char *dest, size_t size)
 314 {
 315         size_t rc;
 316
 317         rc = 0;
 318         if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
 319                 rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
 320         else
 321                 dest[0] = 0;
 322         return rc;
 323 }
 324
 325 static ssize_t ipl_vm_parm_show(struct kobject *kobj,
 326                                 struct kobj_attribute *attr, char *page)
 327 {
 328         char parm[DIAG308_VMPARM_SIZE + 1] = {};
 329
 330         append_ipl_vmparm(parm, sizeof(parm));
 331         return sprintf(page, "%s\n", parm);
 332 }
 333
 334 static size_t scpdata_length(const char* buf, size_t count)
 335 {
 336         while (count) {
 337                 if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
 338                         break;
 339                 count--;
 340         }
 341         return count;
 342 }
 343
 344 static size_t reipl_append_ascii_scpdata(char *dest, size_t size,
 345                                          const struct ipl_parameter_block *ipb)
 346 {
 347         size_t count;
 348         size_t i;
 349         int has_lowercase;
 350
 351         count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data,
 352                                              ipb->ipl_info.fcp.scp_data_len));
 353         if (!count)
 354                 goto out;
 355
 356         has_lowercase = 0;
 357         for (i = 0; i < count; i++) {
 358                 if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
 359                         count = 0;
 360                         goto out;
 361                 }
 362                 if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
 363                         has_lowercase = 1;
 364         }
 365
 366         if (has_lowercase)
 367                 memcpy(dest, ipb->ipl_info.fcp.scp_data, count);
 368         else
 369                 for (i = 0; i < count; i++)
 370                         dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]);
 371 out:
 372         dest[count] = '\0';
 373         return count;
 374 }
 375
 376 size_t append_ipl_scpdata(char *dest, size_t len)
 377 {
 378         size_t rc;
 379
 380         rc = 0;
 381         if (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP)
 382                 rc = reipl_append_ascii_scpdata(dest, len, &ipl_block);
 383         else
 384                 dest[0] = 0;
 385         return rc;
 386 }
 387
 388
 389 static struct kobj_attribute sys_ipl_vm_parm_attr =
 390         __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
 391
 392 static ssize_t sys_ipl_device_show(struct kobject *kobj,
 393                                    struct kobj_attribute *attr, char *page)
 394 {
 395         struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
 396
 397         switch (ipl_info.type) {
 398         case IPL_TYPE_CCW:
 399                 return sprintf(page, "0.0.%04x\n", ipl_devno);
 400         case IPL_TYPE_FCP:
 401         case IPL_TYPE_FCP_DUMP:
 402                 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
 403         default:
 404                 return 0;
 405         }
 406 }
 407
 408 static struct kobj_attribute sys_ipl_device_attr =
 409         __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
 410
 411 static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
 412                                   struct bin_attribute *attr, char *buf,
 413                                   loff_t off, size_t count)
 414 {
 415         return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START,
 416                                         IPL_PARMBLOCK_SIZE);
 417 }
 418
 419 static struct bin_attribute ipl_parameter_attr = {
 420         .attr = {
 421                 .name = "binary_parameter",
 422                 .mode = S_IRUGO,
 423         },
 424         .size = PAGE_SIZE,
 425         .read = &ipl_parameter_read,
 426 };
 427
 428 static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
 429                                  struct bin_attribute *attr, char *buf,
 430                                  loff_t off, size_t count)
 431 {
 432         unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
 433         void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
 434
 435         return memory_read_from_buffer(buf, count, &off, scp_data, size);
 436 }
 437
 438 static struct bin_attribute ipl_scp_data_attr = {
 439         .attr = {
 440                 .name = "scp_data",
 441                 .mode = S_IRUGO,
 442         },
 443         .size = PAGE_SIZE,
 444         .read = ipl_scp_data_read,
 445 };
 446
 447 /* FCP ipl device attributes */
 448
 449 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
 450                    IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
 451 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
 452                    IPL_PARMBLOCK_START->ipl_info.fcp.lun);
 453 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
 454                    IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
 455 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
 456                    IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
 457
 458 static struct attribute *ipl_fcp_attrs[] = {
 459         &sys_ipl_type_attr.attr,
 460         &sys_ipl_device_attr.attr,
 461         &sys_ipl_fcp_wwpn_attr.attr,
 462         &sys_ipl_fcp_lun_attr.attr,
 463         &sys_ipl_fcp_bootprog_attr.attr,
 464         &sys_ipl_fcp_br_lba_attr.attr,
 465         NULL,
 466 };
 467
 468 static struct attribute_group ipl_fcp_attr_group = {
 469         .attrs = ipl_fcp_attrs,
 470 };
 471
 472 /* CCW ipl device attributes */
 473
 474 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
 475                                      struct kobj_attribute *attr, char *page)
 476 {
 477         char loadparm[LOADPARM_LEN + 1] = {};
 478
 479         if (!sclp_ipl_info.is_valid)
 480                 return sprintf(page, "#unknown#\n");
 481         memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
 482         EBCASC(loadparm, LOADPARM_LEN);
 483         strim(loadparm);
 484         return sprintf(page, "%s\n", loadparm);
 485 }
 486
 487 static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
 488         __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
 489
 490 static struct attribute *ipl_ccw_attrs_vm[] = {
 491         &sys_ipl_type_attr.attr,
 492         &sys_ipl_device_attr.attr,
 493         &sys_ipl_ccw_loadparm_attr.attr,
 494         &sys_ipl_vm_parm_attr.attr,
 495         NULL,
 496 };
 497
 498 static struct attribute *ipl_ccw_attrs_lpar[] = {
 499         &sys_ipl_type_attr.attr,
 500         &sys_ipl_device_attr.attr,
 501         &sys_ipl_ccw_loadparm_attr.attr,
 502         NULL,
 503 };
 504
 505 static struct attribute_group ipl_ccw_attr_group_vm = {
 506         .attrs = ipl_ccw_attrs_vm,
 507 };
 508
 509 static struct attribute_group ipl_ccw_attr_group_lpar = {
 510         .attrs = ipl_ccw_attrs_lpar
 511 };
 512
 513 /* NSS ipl device attributes */
 514
 515 DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
 516
 517 static struct attribute *ipl_nss_attrs[] = {
 518         &sys_ipl_type_attr.attr,
 519         &sys_ipl_nss_name_attr.attr,
 520         &sys_ipl_ccw_loadparm_attr.attr,
 521         &sys_ipl_vm_parm_attr.attr,
 522         NULL,
 523 };
 524
 525 static struct attribute_group ipl_nss_attr_group = {
 526         .attrs = ipl_nss_attrs,
 527 };
 528
 529 /* UNKNOWN ipl device attributes */
 530
 531 static struct attribute *ipl_unknown_attrs[] = {
 532         &sys_ipl_type_attr.attr,
 533         NULL,
 534 };
 535
 536 static struct attribute_group ipl_unknown_attr_group = {
 537         .attrs = ipl_unknown_attrs,
 538 };
 539
 540 static struct kset *ipl_kset;
 541
 542 static int __init ipl_register_fcp_files(void)
 543 {
 544         int rc;
 545
 546         rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
 547         if (rc)
 548                 goto out;
 549         rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
 550         if (rc)
 551                 goto out_ipl_parm;
 552         rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_scp_data_attr);
 553         if (!rc)
 554                 goto out;
 555
 556         sysfs_remove_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
 557
 558 out_ipl_parm:
 559         sysfs_remove_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
 560 out:
 561         return rc;
 562 }
 563
 564 static void __ipl_run(void *unused)
 565 {
 566         diag308(DIAG308_IPL, NULL);
 567         if (MACHINE_IS_VM)
 568                 __cpcmd("IPL", NULL, 0, NULL);
 569         else if (ipl_info.type == IPL_TYPE_CCW)
 570                 reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
 571 }
 572
 573 static void ipl_run(struct shutdown_trigger *trigger)
 574 {
 575         smp_call_ipl_cpu(__ipl_run, NULL);
 576 }
 577
 578 static int __init ipl_init(void)
 579 {
 580         int rc;
 581
 582         ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
 583         if (!ipl_kset) {
 584                 rc = -ENOMEM;
 585                 goto out;
 586         }
 587         switch (ipl_info.type) {
 588         case IPL_TYPE_CCW:
 589                 if (MACHINE_IS_VM)
 590                         rc = sysfs_create_group(&ipl_kset->kobj,
 591                                                 &ipl_ccw_attr_group_vm);
 592                 else
 593                         rc = sysfs_create_group(&ipl_kset->kobj,
 594                                                 &ipl_ccw_attr_group_lpar);
 595                 break;
 596         case IPL_TYPE_FCP:
 597         case IPL_TYPE_FCP_DUMP:
 598                 rc = ipl_register_fcp_files();
 599                 break;
 600         case IPL_TYPE_NSS:
 601                 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group);
 602                 break;
 603         default:
 604                 rc = sysfs_create_group(&ipl_kset->kobj,
 605                                         &ipl_unknown_attr_group);
 606                 break;
 607         }
 608 out:
 609         if (rc)
 610                 panic("ipl_init failed: rc = %i\n", rc);
 611
 612         return 0;
 613 }
 614
 615 static struct shutdown_action __refdata ipl_action = {
 616         .name   = SHUTDOWN_ACTION_IPL_STR,
 617         .fn     = ipl_run,
 618         .init   = ipl_init,
 619 };
 620
 621 /*
 622  * reipl shutdown action: Reboot Linux on shutdown.
 623  */
 624
 625 /* VM IPL PARM attributes */
 626 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
 627                                           char *page)
 628 {
 629         char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
 630
 631         reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
 632         return sprintf(page, "%s\n", vmparm);
 633 }
 634
 635 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
 636                                           size_t vmparm_max,
 637                                           const char *buf, size_t len)
 638 {
 639         int i, ip_len;
 640
 641         /* ignore trailing newline */
 642         ip_len = len;
 643         if ((len > 0) && (buf[len - 1] == '\n'))
 644                 ip_len--;
 645
 646         if (ip_len > vmparm_max)
 647                 return -EINVAL;
 648
 649         /* parm is used to store kernel options, check for common chars */
 650         for (i = 0; i < ip_len; i++)
 651                 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
 652                         return -EINVAL;
 653
 654         memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
 655         ipb->ipl_info.ccw.vm_parm_len = ip_len;
 656         if (ip_len > 0) {
 657                 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
 658                 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
 659                 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
 660         } else {
 661                 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
 662         }
 663
 664         return len;
 665 }
 666
 667 /* NSS wrapper */
 668 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
 669                                      struct kobj_attribute *attr, char *page)
 670 {
 671         return reipl_generic_vmparm_show(reipl_block_nss, page);
 672 }
 673
 674 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
 675                                       struct kobj_attribute *attr,
 676                                       const char *buf, size_t len)
 677 {
 678         return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
 679 }
 680
 681 /* CCW wrapper */
 682 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
 683                                      struct kobj_attribute *attr, char *page)
 684 {
 685         return reipl_generic_vmparm_show(reipl_block_ccw, page);
 686 }
 687
 688 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
 689                                       struct kobj_attribute *attr,
 690                                       const char *buf, size_t len)
 691 {
 692         return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
 693 }
 694
 695 static struct kobj_attribute sys_reipl_nss_vmparm_attr =
 696         __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
 697                                         reipl_nss_vmparm_store);
 698 static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
 699         __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
 700                                         reipl_ccw_vmparm_store);
 701
 702 /* FCP reipl device attributes */
 703
 704 static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
 705                                       struct bin_attribute *attr,
 706                                       char *buf, loff_t off, size_t count)
 707 {
 708         size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
 709         void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
 710
 711         return memory_read_from_buffer(buf, count, &off, scp_data, size);
 712 }
 713
 714 static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
 715                                        struct bin_attribute *attr,
 716                                        char *buf, loff_t off, size_t count)
 717 {
 718         size_t padding;
 719         size_t scpdata_len;
 720
 721         if (off < 0)
 722                 return -EINVAL;
 723
 724         if (off >= DIAG308_SCPDATA_SIZE)
 725                 return -ENOSPC;
 726
 727         if (count > DIAG308_SCPDATA_SIZE - off)
 728                 count = DIAG308_SCPDATA_SIZE - off;
 729
 730         memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf + off, count);
 731         scpdata_len = off + count;
 732
 733         if (scpdata_len % 8) {
 734                 padding = 8 - (scpdata_len % 8);
 735                 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
 736                        0, padding);
 737                 scpdata_len += padding;
 738         }
 739
 740         reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
 741         reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
 742         reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
 743
 744         return count;
 745 }
 746
 747 static struct bin_attribute sys_reipl_fcp_scp_data_attr = {
 748         .attr = {
 749                 .name = "scp_data",
 750                 .mode = S_IRUGO | S_IWUSR,
 751         },
 752         .size = PAGE_SIZE,
 753         .read = reipl_fcp_scpdata_read,
 754         .write = reipl_fcp_scpdata_write,
 755 };
 756
 757 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n",
 758                    reipl_block_fcp->ipl_info.fcp.wwpn);
 759 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n",
 760                    reipl_block_fcp->ipl_info.fcp.lun);
 761 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
 762                    reipl_block_fcp->ipl_info.fcp.bootprog);
 763 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
 764                    reipl_block_fcp->ipl_info.fcp.br_lba);
 765 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
 766                    reipl_block_fcp->ipl_info.fcp.devno);
 767
 768 static struct attribute *reipl_fcp_attrs[] = {
 769         &sys_reipl_fcp_device_attr.attr,
 770         &sys_reipl_fcp_wwpn_attr.attr,
 771         &sys_reipl_fcp_lun_attr.attr,
 772         &sys_reipl_fcp_bootprog_attr.attr,
 773         &sys_reipl_fcp_br_lba_attr.attr,
 774         NULL,
 775 };
 776
 777 static struct attribute_group reipl_fcp_attr_group = {
 778         .attrs = reipl_fcp_attrs,
 779 };
 780
 781 /* CCW reipl device attributes */
 782
 783 DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
 784         reipl_block_ccw->ipl_info.ccw.devno);
 785
 786 static void reipl_get_ascii_loadparm(char *loadparm,
 787                                      struct ipl_parameter_block *ibp)
 788 {
 789         memcpy(loadparm, ibp->ipl_info.ccw.load_parm, LOADPARM_LEN);
 790         EBCASC(loadparm, LOADPARM_LEN);
 791         loadparm[LOADPARM_LEN] = 0;
 792         strim(loadparm);
 793 }
 794
 795 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
 796                                            char *page)
 797 {
 798         char buf[LOADPARM_LEN + 1];
 799
 800         reipl_get_ascii_loadparm(buf, ipb);
 801         return sprintf(page, "%s\n", buf);
 802 }
 803
 804 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
 805                                             const char *buf, size_t len)
 806 {
 807         int i, lp_len;
 808
 809         /* ignore trailing newline */
 810         lp_len = len;
 811         if ((len > 0) && (buf[len - 1] == '\n'))
 812                 lp_len--;
 813         /* loadparm can have max 8 characters and must not start with a blank */
 814         if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
 815                 return -EINVAL;
 816         /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
 817         for (i = 0; i < lp_len; i++) {
 818                 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
 819                     (buf[i] == '.'))
 820                         continue;
 821                 return -EINVAL;
 822         }
 823         /* initialize loadparm with blanks */
 824         memset(ipb->ipl_info.ccw.load_parm, ' ', LOADPARM_LEN);
 825         /* copy and convert to ebcdic */
 826         memcpy(ipb->ipl_info.ccw.load_parm, buf, lp_len);
 827         ASCEBC(ipb->ipl_info.ccw.load_parm, LOADPARM_LEN);
 828         return len;
 829 }
 830
 831 /* NSS wrapper */
 832 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
 833                                        struct kobj_attribute *attr, char *page)
 834 {
 835         return reipl_generic_loadparm_show(reipl_block_nss, page);
 836 }
 837
 838 static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
 839                                         struct kobj_attribute *attr,
 840                                         const char *buf, size_t len)
 841 {
 842         return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
 843 }
 844
 845 /* CCW wrapper */
 846 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
 847                                        struct kobj_attribute *attr, char *page)
 848 {
 849         return reipl_generic_loadparm_show(reipl_block_ccw, page);
 850 }
 851
 852 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
 853                                         struct kobj_attribute *attr,
 854                                         const char *buf, size_t len)
 855 {
 856         return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
 857 }
 858
 859 static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
 860         __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
 861                                             reipl_ccw_loadparm_store);
 862
 863 static struct attribute *reipl_ccw_attrs_vm[] = {
 864         &sys_reipl_ccw_device_attr.attr,
 865         &sys_reipl_ccw_loadparm_attr.attr,
 866         &sys_reipl_ccw_vmparm_attr.attr,
 867         NULL,
 868 };
 869
 870 static struct attribute *reipl_ccw_attrs_lpar[] = {
 871         &sys_reipl_ccw_device_attr.attr,
 872         &sys_reipl_ccw_loadparm_attr.attr,
 873         NULL,
 874 };
 875
 876 static struct attribute_group reipl_ccw_attr_group_vm = {
 877         .name  = IPL_CCW_STR,
 878         .attrs = reipl_ccw_attrs_vm,
 879 };
 880
 881 static struct attribute_group reipl_ccw_attr_group_lpar = {
 882         .name  = IPL_CCW_STR,
 883         .attrs = reipl_ccw_attrs_lpar,
 884 };
 885
 886
 887 /* NSS reipl device attributes */
 888 static void reipl_get_ascii_nss_name(char *dst,
 889                                      struct ipl_parameter_block *ipb)
 890 {
 891         memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
 892         EBCASC(dst, NSS_NAME_SIZE);
 893         dst[NSS_NAME_SIZE] = 0;
 894 }
 895
 896 static ssize_t reipl_nss_name_show(struct kobject *kobj,
 897                                    struct kobj_attribute *attr, char *page)
 898 {
 899         char nss_name[NSS_NAME_SIZE + 1] = {};
 900
 901         reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
 902         return sprintf(page, "%s\n", nss_name);
 903 }
 904
 905 static ssize_t reipl_nss_name_store(struct kobject *kobj,
 906                                     struct kobj_attribute *attr,
 907                                     const char *buf, size_t len)
 908 {
 909         int nss_len;
 910
 911         /* ignore trailing newline */
 912         nss_len = len;
 913         if ((len > 0) && (buf[len - 1] == '\n'))
 914                 nss_len--;
 915
 916         if (nss_len > NSS_NAME_SIZE)
 917                 return -EINVAL;
 918
 919         memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
 920         if (nss_len > 0) {
 921                 reipl_block_nss->ipl_info.ccw.vm_flags |=
 922                         DIAG308_VM_FLAGS_NSS_VALID;
 923                 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
 924                 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
 925                 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
 926         } else {
 927                 reipl_block_nss->ipl_info.ccw.vm_flags &=
 928                         ~DIAG308_VM_FLAGS_NSS_VALID;
 929         }
 930
 931         return len;
 932 }
 933
 934 static struct kobj_attribute sys_reipl_nss_name_attr =
 935         __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
 936                                         reipl_nss_name_store);
 937
 938 static struct kobj_attribute sys_reipl_nss_loadparm_attr =
 939         __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
 940                                             reipl_nss_loadparm_store);
 941
 942 static struct attribute *reipl_nss_attrs[] = {
 943         &sys_reipl_nss_name_attr.attr,
 944         &sys_reipl_nss_loadparm_attr.attr,
 945         &sys_reipl_nss_vmparm_attr.attr,
 946         NULL,
 947 };
 948
 949 static struct attribute_group reipl_nss_attr_group = {
 950         .name  = IPL_NSS_STR,
 951         .attrs = reipl_nss_attrs,
 952 };
 953
 954 static void set_reipl_block_actual(struct ipl_parameter_block *reipl_block)
 955 {
 956         reipl_block_actual = reipl_block;
 957         os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual,
 958                           reipl_block->hdr.len);
 959 }
 960
 961 /* reipl type */
 962
 963 static int reipl_set_type(enum ipl_type type)
 964 {
 965         if (!(reipl_capabilities & type))
 966                 return -EINVAL;
 967
 968         switch(type) {
 969         case IPL_TYPE_CCW:
 970                 if (diag308_set_works)
 971                         reipl_method = REIPL_METHOD_CCW_DIAG;
 972                 else if (MACHINE_IS_VM)
 973                         reipl_method = REIPL_METHOD_CCW_VM;
 974                 else
 975                         reipl_method = REIPL_METHOD_CCW_CIO;
 976                 set_reipl_block_actual(reipl_block_ccw);
 977                 break;
 978         case IPL_TYPE_FCP:
 979                 if (diag308_set_works)
 980                         reipl_method = REIPL_METHOD_FCP_RW_DIAG;
 981                 else if (MACHINE_IS_VM)
 982                         reipl_method = REIPL_METHOD_FCP_RO_VM;
 983                 else
 984                         reipl_method = REIPL_METHOD_FCP_RO_DIAG;
 985                 set_reipl_block_actual(reipl_block_fcp);
 986                 break;
 987         case IPL_TYPE_FCP_DUMP:
 988                 reipl_method = REIPL_METHOD_FCP_DUMP;
 989                 break;
 990         case IPL_TYPE_NSS:
 991                 if (diag308_set_works)
 992                         reipl_method = REIPL_METHOD_NSS_DIAG;
 993                 else
 994                         reipl_method = REIPL_METHOD_NSS;
 995                 set_reipl_block_actual(reipl_block_nss);
 996                 break;
 997         case IPL_TYPE_UNKNOWN:
 998                 reipl_method = REIPL_METHOD_DEFAULT;
 999                 break;
1000         default:
1001                 BUG();
1002         }
1003         reipl_type = type;
1004         return 0;
1005 }
1006
1007 static ssize_t reipl_type_show(struct kobject *kobj,
1008                                struct kobj_attribute *attr, char *page)
1009 {
1010         return sprintf(page, "%s\n", ipl_type_str(reipl_type));
1011 }
1012
1013 static ssize_t reipl_type_store(struct kobject *kobj,
1014                                 struct kobj_attribute *attr,
1015                                 const char *buf, size_t len)
1016 {
1017         int rc = -EINVAL;
1018
1019         if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1020                 rc = reipl_set_type(IPL_TYPE_CCW);
1021         else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1022                 rc = reipl_set_type(IPL_TYPE_FCP);
1023         else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1024                 rc = reipl_set_type(IPL_TYPE_NSS);
1025         return (rc != 0) ? rc : len;
1026 }
1027
1028 static struct kobj_attribute reipl_type_attr =
1029         __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
1030
1031 static struct kset *reipl_kset;
1032 static struct kset *reipl_fcp_kset;
1033
1034 static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
1035                            const enum ipl_method m)
1036 {
1037         char loadparm[LOADPARM_LEN + 1] = {};
1038         char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
1039         char nss_name[NSS_NAME_SIZE + 1] = {};
1040         size_t pos = 0;
1041
1042         reipl_get_ascii_loadparm(loadparm, ipb);
1043         reipl_get_ascii_nss_name(nss_name, ipb);
1044         reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
1045
1046         switch (m) {
1047         case REIPL_METHOD_CCW_VM:
1048                 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
1049                 break;
1050         case REIPL_METHOD_NSS:
1051                 pos = sprintf(dst, "IPL %s", nss_name);
1052                 break;
1053         default:
1054                 break;
1055         }
1056         if (strlen(loadparm) > 0)
1057                 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
1058         if (strlen(vmparm) > 0)
1059                 sprintf(dst + pos, " PARM %s", vmparm);
1060 }
1061
1062 static void __reipl_run(void *unused)
1063 {
1064         struct ccw_dev_id devid;
1065         static char buf[128];
1066
1067         switch (reipl_method) {
1068         case REIPL_METHOD_CCW_CIO:
1069                 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
1070                 devid.ssid  = 0;
1071                 reipl_ccw_dev(&devid);
1072                 break;
1073         case REIPL_METHOD_CCW_VM:
1074                 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
1075                 __cpcmd(buf, NULL, 0, NULL);
1076                 break;
1077         case REIPL_METHOD_CCW_DIAG:
1078                 diag308(DIAG308_SET, reipl_block_ccw);
1079                 diag308(DIAG308_IPL, NULL);
1080                 break;
1081         case REIPL_METHOD_FCP_RW_DIAG:
1082                 diag308(DIAG308_SET, reipl_block_fcp);
1083                 diag308(DIAG308_IPL, NULL);
1084                 break;
1085         case REIPL_METHOD_FCP_RO_DIAG:
1086                 diag308(DIAG308_IPL, NULL);
1087                 break;
1088         case REIPL_METHOD_FCP_RO_VM:
1089                 __cpcmd("IPL", NULL, 0, NULL);
1090                 break;
1091         case REIPL_METHOD_NSS_DIAG:
1092                 diag308(DIAG308_SET, reipl_block_nss);
1093                 diag308(DIAG308_IPL, NULL);
1094                 break;
1095         case REIPL_METHOD_NSS:
1096                 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
1097                 __cpcmd(buf, NULL, 0, NULL);
1098                 break;
1099         case REIPL_METHOD_DEFAULT:
1100                 if (MACHINE_IS_VM)
1101                         __cpcmd("IPL", NULL, 0, NULL);
1102                 diag308(DIAG308_IPL, NULL);
1103                 break;
1104         case REIPL_METHOD_FCP_DUMP:
1105                 break;
1106         }
1107         disabled_wait((unsigned long) __builtin_return_address(0));
1108 }
1109
1110 static void reipl_run(struct shutdown_trigger *trigger)
1111 {
1112         smp_call_ipl_cpu(__reipl_run, NULL);
1113 }
1114
1115 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
1116 {
1117         ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
1118         ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1119         ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1120         ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1121 }
1122
1123 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1124 {
1125         /* LOADPARM */
1126         /* check if read scp info worked and set loadparm */
1127         if (sclp_ipl_info.is_valid)
1128                 memcpy(ipb->ipl_info.ccw.load_parm,
1129                                 &sclp_ipl_info.loadparm, LOADPARM_LEN);
1130         else
1131                 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1132                 memset(ipb->ipl_info.ccw.load_parm, 0x40, LOADPARM_LEN);
1133         ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
1134
1135         /* VM PARM */
1136         if (MACHINE_IS_VM && diag308_set_works &&
1137             (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1138
1139                 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1140                 ipb->ipl_info.ccw.vm_parm_len =
1141                                         ipl_block.ipl_info.ccw.vm_parm_len;
1142                 memcpy(ipb->ipl_info.ccw.vm_parm,
1143                        ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1144         }
1145 }
1146
1147 static int __init reipl_nss_init(void)
1148 {
1149         int rc;
1150
1151         if (!MACHINE_IS_VM)
1152                 return 0;
1153
1154         reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1155         if (!reipl_block_nss)
1156                 return -ENOMEM;
1157
1158         if (!diag308_set_works)
1159                 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO;
1160
1161         rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1162         if (rc)
1163                 return rc;
1164
1165         reipl_block_ccw_init(reipl_block_nss);
1166         if (ipl_info.type == IPL_TYPE_NSS) {
1167                 memset(reipl_block_nss->ipl_info.ccw.nss_name,
1168                         ' ', NSS_NAME_SIZE);
1169                 memcpy(reipl_block_nss->ipl_info.ccw.nss_name,
1170                         kernel_nss_name, strlen(kernel_nss_name));
1171                 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
1172                 reipl_block_nss->ipl_info.ccw.vm_flags |=
1173                         DIAG308_VM_FLAGS_NSS_VALID;
1174
1175                 reipl_block_ccw_fill_parms(reipl_block_nss);
1176         }
1177
1178         reipl_capabilities |= IPL_TYPE_NSS;
1179         return 0;
1180 }
1181
1182 static int __init reipl_ccw_init(void)
1183 {
1184         int rc;
1185
1186         reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1187         if (!reipl_block_ccw)
1188                 return -ENOMEM;
1189
1190         if (MACHINE_IS_VM) {
1191                 if (!diag308_set_works)
1192                         sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
1193                 rc = sysfs_create_group(&reipl_kset->kobj,
1194                                         &reipl_ccw_attr_group_vm);
1195         } else {
1196                 if(!diag308_set_works)
1197                         sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
1198                 rc = sysfs_create_group(&reipl_kset->kobj,
1199                                         &reipl_ccw_attr_group_lpar);
1200         }
1201         if (rc)
1202                 return rc;
1203
1204         reipl_block_ccw_init(reipl_block_ccw);
1205         if (ipl_info.type == IPL_TYPE_CCW) {
1206                 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
1207                 reipl_block_ccw_fill_parms(reipl_block_ccw);
1208         }
1209
1210         reipl_capabilities |= IPL_TYPE_CCW;
1211         return 0;
1212 }
1213
1214 static int __init reipl_fcp_init(void)
1215 {
1216         int rc;
1217
1218         if (!diag308_set_works) {
1219                 if (ipl_info.type == IPL_TYPE_FCP) {
1220                         make_attrs_ro(reipl_fcp_attrs);
1221                         sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO;
1222                 } else
1223                         return 0;
1224         }
1225
1226         reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1227         if (!reipl_block_fcp)
1228                 return -ENOMEM;
1229
1230         /* sysfs: create fcp kset for mixing attr group and bin attrs */
1231         reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1232                                              &reipl_kset->kobj);
1233         if (!reipl_fcp_kset) {
1234                 free_page((unsigned long) reipl_block_fcp);
1235                 return -ENOMEM;
1236         }
1237
1238         rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1239         if (rc) {
1240                 kset_unregister(reipl_fcp_kset);
1241                 free_page((unsigned long) reipl_block_fcp);
1242                 return rc;
1243         }
1244
1245         rc = sysfs_create_bin_file(&reipl_fcp_kset->kobj,
1246                                    &sys_reipl_fcp_scp_data_attr);
1247         if (rc) {
1248                 sysfs_remove_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1249                 kset_unregister(reipl_fcp_kset);
1250                 free_page((unsigned long) reipl_block_fcp);
1251                 return rc;
1252         }
1253
1254         if (ipl_info.type == IPL_TYPE_FCP)
1255                 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
1256         else {
1257                 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1258                 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1259                 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1260                 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1261                 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1262         }
1263         reipl_capabilities |= IPL_TYPE_FCP;
1264         return 0;
1265 }
1266
1267 static int __init reipl_type_init(void)
1268 {
1269         enum ipl_type reipl_type = ipl_info.type;
1270         struct ipl_parameter_block *reipl_block;
1271         unsigned long size;
1272
1273         reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size);
1274         if (!reipl_block)
1275                 goto out;
1276         /*
1277          * If we have an OS info reipl block, this will be used
1278          */
1279         if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_FCP) {
1280                 memcpy(reipl_block_fcp, reipl_block, size);
1281                 reipl_type = IPL_TYPE_FCP;
1282         } else if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_CCW) {
1283                 memcpy(reipl_block_ccw, reipl_block, size);
1284                 reipl_type = IPL_TYPE_CCW;
1285         }
1286 out:
1287         return reipl_set_type(reipl_type);
1288 }
1289
1290 static int __init reipl_init(void)
1291 {
1292         int rc;
1293
1294         reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1295         if (!reipl_kset)
1296                 return -ENOMEM;
1297         rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1298         if (rc) {
1299                 kset_unregister(reipl_kset);
1300                 return rc;
1301         }
1302         rc = reipl_ccw_init();
1303         if (rc)
1304                 return rc;
1305         rc = reipl_fcp_init();
1306         if (rc)
1307                 return rc;
1308         rc = reipl_nss_init();
1309         if (rc)
1310                 return rc;
1311         return reipl_type_init();
1312 }
1313
1314 static struct shutdown_action __refdata reipl_action = {
1315         .name   = SHUTDOWN_ACTION_REIPL_STR,
1316         .fn     = reipl_run,
1317         .init   = reipl_init,
1318 };
1319
1320 /*
1321  * dump shutdown action: Dump Linux on shutdown.
1322  */
1323
1324 /* FCP dump device attributes */
1325
1326 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n",
1327                    dump_block_fcp->ipl_info.fcp.wwpn);
1328 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n",
1329                    dump_block_fcp->ipl_info.fcp.lun);
1330 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1331                    dump_block_fcp->ipl_info.fcp.bootprog);
1332 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1333                    dump_block_fcp->ipl_info.fcp.br_lba);
1334 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1335                    dump_block_fcp->ipl_info.fcp.devno);
1336
1337 static struct attribute *dump_fcp_attrs[] = {
1338         &sys_dump_fcp_device_attr.attr,
1339         &sys_dump_fcp_wwpn_attr.attr,
1340         &sys_dump_fcp_lun_attr.attr,
1341         &sys_dump_fcp_bootprog_attr.attr,
1342         &sys_dump_fcp_br_lba_attr.attr,
1343         NULL,
1344 };
1345
1346 static struct attribute_group dump_fcp_attr_group = {
1347         .name  = IPL_FCP_STR,
1348         .attrs = dump_fcp_attrs,
1349 };
1350
1351 /* CCW dump device attributes */
1352
1353 DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
1354                    dump_block_ccw->ipl_info.ccw.devno);
1355
1356 static struct attribute *dump_ccw_attrs[] = {
1357         &sys_dump_ccw_device_attr.attr,
1358         NULL,
1359 };
1360
1361 static struct attribute_group dump_ccw_attr_group = {
1362         .name  = IPL_CCW_STR,
1363         .attrs = dump_ccw_attrs,
1364 };
1365
1366 /* dump type */
1367
1368 static int dump_set_type(enum dump_type type)
1369 {
1370         if (!(dump_capabilities & type))
1371                 return -EINVAL;
1372         switch (type) {
1373         case DUMP_TYPE_CCW:
1374                 if (diag308_set_works)
1375                         dump_method = DUMP_METHOD_CCW_DIAG;
1376                 else if (MACHINE_IS_VM)
1377                         dump_method = DUMP_METHOD_CCW_VM;
1378                 else
1379                         dump_method = DUMP_METHOD_CCW_CIO;
1380                 break;
1381         case DUMP_TYPE_FCP:
1382                 dump_method = DUMP_METHOD_FCP_DIAG;
1383                 break;
1384         default:
1385                 dump_method = DUMP_METHOD_NONE;
1386         }
1387         dump_type = type;
1388         return 0;
1389 }
1390
1391 static ssize_t dump_type_show(struct kobject *kobj,
1392                               struct kobj_attribute *attr, char *page)
1393 {
1394         return sprintf(page, "%s\n", dump_type_str(dump_type));
1395 }
1396
1397 static ssize_t dump_type_store(struct kobject *kobj,
1398                                struct kobj_attribute *attr,
1399                                const char *buf, size_t len)
1400 {
1401         int rc = -EINVAL;
1402
1403         if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1404                 rc = dump_set_type(DUMP_TYPE_NONE);
1405         else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1406                 rc = dump_set_type(DUMP_TYPE_CCW);
1407         else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1408                 rc = dump_set_type(DUMP_TYPE_FCP);
1409         return (rc != 0) ? rc : len;
1410 }
1411
1412 static struct kobj_attribute dump_type_attr =
1413         __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1414
1415 static struct kset *dump_kset;
1416
1417 static void diag308_dump(void *dump_block)
1418 {
1419         diag308(DIAG308_SET, dump_block);
1420         while (1) {
1421                 if (diag308(DIAG308_DUMP, NULL) != 0x302)
1422                         break;
1423                 udelay_simple(USEC_PER_SEC);
1424         }
1425 }
1426
1427 static void __dump_run(void *unused)
1428 {
1429         struct ccw_dev_id devid;
1430         static char buf[100];
1431
1432         switch (dump_method) {
1433         case DUMP_METHOD_CCW_CIO:
1434                 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
1435                 devid.ssid  = 0;
1436                 reipl_ccw_dev(&devid);
1437                 break;
1438         case DUMP_METHOD_CCW_VM:
1439                 sprintf(buf, "STORE STATUS");
1440                 __cpcmd(buf, NULL, 0, NULL);
1441                 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
1442                 __cpcmd(buf, NULL, 0, NULL);
1443                 break;
1444         case DUMP_METHOD_CCW_DIAG:
1445                 diag308_dump(dump_block_ccw);
1446                 break;
1447         case DUMP_METHOD_FCP_DIAG:
1448                 diag308_dump(dump_block_fcp);
1449                 break;
1450         default:
1451                 break;
1452         }
1453 }
1454
1455 static void dump_run(struct shutdown_trigger *trigger)
1456 {
1457         if (dump_method == DUMP_METHOD_NONE)
1458                 return;
1459         smp_send_stop();
1460         smp_call_ipl_cpu(__dump_run, NULL);
1461 }
1462
1463 static int __init dump_ccw_init(void)
1464 {
1465         int rc;
1466
1467         dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1468         if (!dump_block_ccw)
1469                 return -ENOMEM;
1470         rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1471         if (rc) {
1472                 free_page((unsigned long)dump_block_ccw);
1473                 return rc;
1474         }
1475         dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1476         dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1477         dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1478         dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1479         dump_capabilities |= DUMP_TYPE_CCW;
1480         return 0;
1481 }
1482
1483 static int __init dump_fcp_init(void)
1484 {
1485         int rc;
1486
1487         if (!sclp_ipl_info.has_dump)
1488                 return 0; /* LDIPL DUMP is not installed */
1489         if (!diag308_set_works)
1490                 return 0;
1491         dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1492         if (!dump_block_fcp)
1493                 return -ENOMEM;
1494         rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1495         if (rc) {
1496                 free_page((unsigned long)dump_block_fcp);
1497                 return rc;
1498         }
1499         dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1500         dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1501         dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1502         dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1503         dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1504         dump_capabilities |= DUMP_TYPE_FCP;
1505         return 0;
1506 }
1507
1508 static int __init dump_init(void)
1509 {
1510         int rc;
1511
1512         dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1513         if (!dump_kset)
1514                 return -ENOMEM;
1515         rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1516         if (rc) {
1517                 kset_unregister(dump_kset);
1518                 return rc;
1519         }
1520         rc = dump_ccw_init();
1521         if (rc)
1522                 return rc;
1523         rc = dump_fcp_init();
1524         if (rc)
1525                 return rc;
1526         dump_set_type(DUMP_TYPE_NONE);
1527         return 0;
1528 }
1529
1530 static struct shutdown_action __refdata dump_action = {
1531         .name   = SHUTDOWN_ACTION_DUMP_STR,
1532         .fn     = dump_run,
1533         .init   = dump_init,
1534 };
1535
1536 static void dump_reipl_run(struct shutdown_trigger *trigger)
1537 {
1538         unsigned long ipib = (unsigned long) reipl_block_actual;
1539         unsigned int csum;
1540
1541         csum = csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
1542         mem_assign_absolute(S390_lowcore.ipib, ipib);
1543         mem_assign_absolute(S390_lowcore.ipib_checksum, csum);
1544         dump_run(trigger);
1545 }
1546
1547 static int __init dump_reipl_init(void)
1548 {
1549         if (!diag308_set_works)
1550                 return -EOPNOTSUPP;
1551         else
1552                 return 0;
1553 }
1554
1555 static struct shutdown_action __refdata dump_reipl_action = {
1556         .name   = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1557         .fn     = dump_reipl_run,
1558         .init   = dump_reipl_init,
1559 };
1560
1561 /*
1562  * vmcmd shutdown action: Trigger vm command on shutdown.
1563  */
1564
1565 static char vmcmd_on_reboot[128];
1566 static char vmcmd_on_panic[128];
1567 static char vmcmd_on_halt[128];
1568 static char vmcmd_on_poff[128];
1569 static char vmcmd_on_restart[128];
1570
1571 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1572 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1573 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1574 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1575 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1576
1577 static struct attribute *vmcmd_attrs[] = {
1578         &sys_vmcmd_on_reboot_attr.attr,
1579         &sys_vmcmd_on_panic_attr.attr,
1580         &sys_vmcmd_on_halt_attr.attr,
1581         &sys_vmcmd_on_poff_attr.attr,
1582         &sys_vmcmd_on_restart_attr.attr,
1583         NULL,
1584 };
1585
1586 static struct attribute_group vmcmd_attr_group = {
1587         .attrs = vmcmd_attrs,
1588 };
1589
1590 static struct kset *vmcmd_kset;
1591
1592 static void vmcmd_run(struct shutdown_trigger *trigger)
1593 {
1594         char *cmd;
1595
1596         if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1597                 cmd = vmcmd_on_reboot;
1598         else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1599                 cmd = vmcmd_on_panic;
1600         else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1601                 cmd = vmcmd_on_halt;
1602         else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1603                 cmd = vmcmd_on_poff;
1604         else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
1605                 cmd = vmcmd_on_restart;
1606         else
1607                 return;
1608
1609         if (strlen(cmd) == 0)
1610                 return;
1611         __cpcmd(cmd, NULL, 0, NULL);
1612 }
1613
1614 static int vmcmd_init(void)
1615 {
1616         if (!MACHINE_IS_VM)
1617                 return -EOPNOTSUPP;
1618         vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1619         if (!vmcmd_kset)
1620                 return -ENOMEM;
1621         return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1622 }
1623
1624 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1625                                               vmcmd_run, vmcmd_init};
1626
1627 /*
1628  * stop shutdown action: Stop Linux on shutdown.
1629  */
1630
1631 static void stop_run(struct shutdown_trigger *trigger)
1632 {
1633         if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
1634             strcmp(trigger->name, ON_RESTART_STR) == 0)
1635                 disabled_wait((unsigned long) __builtin_return_address(0));
1636         smp_stop_cpu();
1637 }
1638
1639 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1640                                              stop_run, NULL};
1641
1642 /* action list */
1643
1644 static struct shutdown_action *shutdown_actions_list[] = {
1645         &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1646         &vmcmd_action, &stop_action};
1647 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1648
1649 /*
1650  * Trigger section
1651  */
1652
1653 static struct kset *shutdown_actions_kset;
1654
1655 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1656                        size_t len)
1657 {
1658         int i;
1659
1660         for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1661                 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1662                         if (shutdown_actions_list[i]->init_rc) {
1663                                 return shutdown_actions_list[i]->init_rc;
1664                         } else {
1665                                 trigger->action = shutdown_actions_list[i];
1666                                 return len;
1667                         }
1668                 }
1669         }
1670         return -EINVAL;
1671 }
1672
1673 /* on reipl */
1674
1675 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1676                                                     &reipl_action};
1677
1678 static ssize_t on_reboot_show(struct kobject *kobj,
1679                               struct kobj_attribute *attr, char *page)
1680 {
1681         return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1682 }
1683
1684 static ssize_t on_reboot_store(struct kobject *kobj,
1685                                struct kobj_attribute *attr,
1686                                const char *buf, size_t len)
1687 {
1688         return set_trigger(buf, &on_reboot_trigger, len);
1689 }
1690
1691 static struct kobj_attribute on_reboot_attr =
1692         __ATTR(on_reboot, 0644, on_reboot_show, on_reboot_store);
1693
1694 static void do_machine_restart(char *__unused)
1695 {
1696         smp_send_stop();
1697         on_reboot_trigger.action->fn(&on_reboot_trigger);
1698         reipl_run(NULL);
1699 }
1700 void (*_machine_restart)(char *command) = do_machine_restart;
1701
1702 /* on panic */
1703
1704 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1705
1706 static ssize_t on_panic_show(struct kobject *kobj,
1707                              struct kobj_attribute *attr, char *page)
1708 {
1709         return sprintf(page, "%s\n", on_panic_trigger.action->name);
1710 }
1711
1712 static ssize_t on_panic_store(struct kobject *kobj,
1713                               struct kobj_attribute *attr,
1714                               const char *buf, size_t len)
1715 {
1716         return set_trigger(buf, &on_panic_trigger, len);
1717 }
1718
1719 static struct kobj_attribute on_panic_attr =
1720         __ATTR(on_panic, 0644, on_panic_show, on_panic_store);
1721
1722 static void do_panic(void)
1723 {
1724         lgr_info_log();
1725         on_panic_trigger.action->fn(&on_panic_trigger);
1726         stop_run(&on_panic_trigger);
1727 }
1728
1729 /* on restart */
1730
1731 static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
1732         &stop_action};
1733
1734 static ssize_t on_restart_show(struct kobject *kobj,
1735                                struct kobj_attribute *attr, char *page)
1736 {
1737         return sprintf(page, "%s\n", on_restart_trigger.action->name);
1738 }
1739
1740 static ssize_t on_restart_store(struct kobject *kobj,
1741                                 struct kobj_attribute *attr,
1742                                 const char *buf, size_t len)
1743 {
1744         return set_trigger(buf, &on_restart_trigger, len);
1745 }
1746
1747 static struct kobj_attribute on_restart_attr =
1748         __ATTR(on_restart, 0644, on_restart_show, on_restart_store);
1749
1750 static void __do_restart(void *ignore)
1751 {
1752         __arch_local_irq_stosm(0x04); /* enable DAT */
1753         smp_send_stop();
1754 #ifdef CONFIG_CRASH_DUMP
1755         crash_kexec(NULL);
1756 #endif
1757         on_restart_trigger.action->fn(&on_restart_trigger);
1758         stop_run(&on_restart_trigger);
1759 }
1760
1761 void do_restart(void)
1762 {
1763         tracing_off();
1764         debug_locks_off();
1765         lgr_info_log();
1766         smp_call_online_cpu(__do_restart, NULL);
1767 }
1768
1769 /* on halt */
1770
1771 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1772
1773 static ssize_t on_halt_show(struct kobject *kobj,
1774                             struct kobj_attribute *attr, char *page)
1775 {
1776         return sprintf(page, "%s\n", on_halt_trigger.action->name);
1777 }
1778
1779 static ssize_t on_halt_store(struct kobject *kobj,
1780                              struct kobj_attribute *attr,
1781                              const char *buf, size_t len)
1782 {
1783         return set_trigger(buf, &on_halt_trigger, len);
1784 }
1785
1786 static struct kobj_attribute on_halt_attr =
1787         __ATTR(on_halt, 0644, on_halt_show, on_halt_store);
1788
1789
1790 static void do_machine_halt(void)
1791 {
1792         smp_send_stop();
1793         on_halt_trigger.action->fn(&on_halt_trigger);
1794         stop_run(&on_halt_trigger);
1795 }
1796 void (*_machine_halt)(void) = do_machine_halt;
1797
1798 /* on power off */
1799
1800 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1801
1802 static ssize_t on_poff_show(struct kobject *kobj,
1803                             struct kobj_attribute *attr, char *page)
1804 {
1805         return sprintf(page, "%s\n", on_poff_trigger.action->name);
1806 }
1807
1808 static ssize_t on_poff_store(struct kobject *kobj,
1809                              struct kobj_attribute *attr,
1810                              const char *buf, size_t len)
1811 {
1812         return set_trigger(buf, &on_poff_trigger, len);
1813 }
1814
1815 static struct kobj_attribute on_poff_attr =
1816         __ATTR(on_poff, 0644, on_poff_show, on_poff_store);
1817
1818
1819 static void do_machine_power_off(void)
1820 {
1821         smp_send_stop();
1822         on_poff_trigger.action->fn(&on_poff_trigger);
1823         stop_run(&on_poff_trigger);
1824 }
1825 void (*_machine_power_off)(void) = do_machine_power_off;
1826
1827 static void __init shutdown_triggers_init(void)
1828 {
1829         shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1830                                                     firmware_kobj);
1831         if (!shutdown_actions_kset)
1832                 goto fail;
1833         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1834                               &on_reboot_attr.attr))
1835                 goto fail;
1836         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1837                               &on_panic_attr.attr))
1838                 goto fail;
1839         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1840                               &on_halt_attr.attr))
1841                 goto fail;
1842         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1843                               &on_poff_attr.attr))
1844                 goto fail;
1845         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1846                               &on_restart_attr.attr))
1847                 goto fail;
1848         return;
1849 fail:
1850         panic("shutdown_triggers_init failed\n");
1851 }
1852
1853 static void __init shutdown_actions_init(void)
1854 {
1855         int i;
1856
1857         for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1858                 if (!shutdown_actions_list[i]->init)
1859                         continue;
1860                 shutdown_actions_list[i]->init_rc =
1861                         shutdown_actions_list[i]->init();
1862         }
1863 }
1864
1865 static int __init s390_ipl_init(void)
1866 {
1867         sclp_get_ipl_info(&sclp_ipl_info);
1868         shutdown_actions_init();
1869         shutdown_triggers_init();
1870         return 0;
1871 }
1872
1873 __initcall(s390_ipl_init);
1874
1875 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1876 {
1877         int sx, dx;
1878
1879         dx = 0;
1880         for (sx = 0; src[sx] != 0; sx++) {
1881                 if (src[sx] == '"')
1882                         continue;
1883                 dst[dx++] = src[sx];
1884                 if (dx >= n)
1885                         break;
1886         }
1887 }
1888
1889 static int __init vmcmd_on_reboot_setup(char *str)
1890 {
1891         if (!MACHINE_IS_VM)
1892                 return 1;
1893         strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1894         vmcmd_on_reboot[127] = 0;
1895         on_reboot_trigger.action = &vmcmd_action;
1896         return 1;
1897 }
1898 __setup("vmreboot=", vmcmd_on_reboot_setup);
1899
1900 static int __init vmcmd_on_panic_setup(char *str)
1901 {
1902         if (!MACHINE_IS_VM)
1903                 return 1;
1904         strncpy_skip_quote(vmcmd_on_panic, str, 127);
1905         vmcmd_on_panic[127] = 0;
1906         on_panic_trigger.action = &vmcmd_action;
1907         return 1;
1908 }
1909 __setup("vmpanic=", vmcmd_on_panic_setup);
1910
1911 static int __init vmcmd_on_halt_setup(char *str)
1912 {
1913         if (!MACHINE_IS_VM)
1914                 return 1;
1915         strncpy_skip_quote(vmcmd_on_halt, str, 127);
1916         vmcmd_on_halt[127] = 0;
1917         on_halt_trigger.action = &vmcmd_action;
1918         return 1;
1919 }
1920 __setup("vmhalt=", vmcmd_on_halt_setup);
1921
1922 static int __init vmcmd_on_poff_setup(char *str)
1923 {
1924         if (!MACHINE_IS_VM)
1925                 return 1;
1926         strncpy_skip_quote(vmcmd_on_poff, str, 127);
1927         vmcmd_on_poff[127] = 0;
1928         on_poff_trigger.action = &vmcmd_action;
1929         return 1;
1930 }
1931 __setup("vmpoff=", vmcmd_on_poff_setup);
1932
1933 static int on_panic_notify(struct notifier_block *self,
1934                            unsigned long event, void *data)
1935 {
1936         do_panic();
1937         return NOTIFY_OK;
1938 }
1939
1940 static struct notifier_block on_panic_nb = {
1941         .notifier_call = on_panic_notify,
1942         .priority = INT_MIN,
1943 };
1944
1945 void __init setup_ipl(void)
1946 {
1947         ipl_info.type = get_ipl_type();
1948         switch (ipl_info.type) {
1949         case IPL_TYPE_CCW:
1950                 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1951                 ipl_info.data.ccw.dev_id.ssid = 0;
1952                 break;
1953         case IPL_TYPE_FCP:
1954         case IPL_TYPE_FCP_DUMP:
1955                 ipl_info.data.fcp.dev_id.devno =
1956                         IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1957                 ipl_info.data.fcp.dev_id.ssid = 0;
1958                 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1959                 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1960                 break;
1961         case IPL_TYPE_NSS:
1962                 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1963                         sizeof(ipl_info.data.nss.name));
1964                 break;
1965         case IPL_TYPE_UNKNOWN:
1966                 /* We have no info to copy */
1967                 break;
1968         }
1969         atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1970 }
1971
1972 void __init ipl_update_parameters(void)
1973 {
1974         int rc;
1975
1976         rc = diag308(DIAG308_STORE, &ipl_block);
1977         if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
1978                 diag308_set_works = 1;
1979 }
1980
1981 void __init ipl_save_parameters(void)
1982 {
1983         struct cio_iplinfo iplinfo;
1984         void *src, *dst;
1985
1986         if (cio_get_iplinfo(&iplinfo))
1987                 return;
1988
1989         ipl_devno = iplinfo.devno;
1990         ipl_flags |= IPL_DEVNO_VALID;
1991         if (!iplinfo.is_qdio)
1992                 return;
1993         ipl_flags |= IPL_PARMBLOCK_VALID;
1994         src = (void *)(unsigned long)S390_lowcore.ipl_parmblock_ptr;
1995         dst = (void *)IPL_PARMBLOCK_ORIGIN;
1996         memmove(dst, src, PAGE_SIZE);
1997         S390_lowcore.ipl_parmblock_ptr = IPL_PARMBLOCK_ORIGIN;
1998 }
1999
2000 static LIST_HEAD(rcall);
2001 static DEFINE_MUTEX(rcall_mutex);
2002
2003 void register_reset_call(struct reset_call *reset)
2004 {
2005         mutex_lock(&rcall_mutex);
2006         list_add(&reset->list, &rcall);
2007         mutex_unlock(&rcall_mutex);
2008 }
2009 EXPORT_SYMBOL_GPL(register_reset_call);
2010
2011 void unregister_reset_call(struct reset_call *reset)
2012 {
2013         mutex_lock(&rcall_mutex);
2014         list_del(&reset->list);
2015         mutex_unlock(&rcall_mutex);
2016 }
2017 EXPORT_SYMBOL_GPL(unregister_reset_call);
2018
2019 static void do_reset_calls(void)
2020 {
2021         struct reset_call *reset;
2022
2023 #ifdef CONFIG_64BIT
2024         if (diag308_set_works) {
2025                 diag308_reset();
2026                 return;
2027         }
2028 #endif
2029         list_for_each_entry(reset, &rcall, list)
2030                 reset->fn();
2031 }
2032
2033 u32 dump_prefix_page;
2034
2035 void s390_reset_system(void (*func)(void *), void *data)
2036 {
2037         struct _lowcore *lc;
2038
2039         lc = (struct _lowcore *)(unsigned long) store_prefix();
2040
2041         /* Stack for interrupt/machine check handler */
2042         lc->panic_stack = S390_lowcore.panic_stack;
2043
2044         /* Save prefix page address for dump case */
2045         dump_prefix_page = (u32)(unsigned long) lc;
2046
2047         /* Disable prefixing */
2048         set_prefix(0);
2049
2050         /* Disable lowcore protection */
2051         __ctl_clear_bit(0,28);
2052
2053         /* Set new machine check handler */
2054         S390_lowcore.mcck_new_psw.mask = psw_kernel_bits | PSW_MASK_DAT;
2055         S390_lowcore.mcck_new_psw.addr =
2056                 PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;
2057
2058         /* Set new program check handler */
2059         S390_lowcore.program_new_psw.mask = psw_kernel_bits | PSW_MASK_DAT;
2060         S390_lowcore.program_new_psw.addr =
2061                 PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
2062
2063         /* Store status at absolute zero */
2064         store_status();
2065
2066         do_reset_calls();
2067         if (func)
2068                 func(data);
2069 }