arch/s390/kernel/ipl.c

   1 /*
   2  *  arch/s390/kernel/ipl.c
   3  *    ipl/reipl/dump support for Linux on s390.
   4  *
   5  *    Copyright IBM Corp. 2005,2007
   6  *    Author(s): Michael Holzheu <holzheu@de.ibm.com>
   7  *               Heiko Carstens <heiko.carstens@de.ibm.com>
   8  *               Volker Sameske <sameske@de.ibm.com>
   9  */
  10
  11 #include <linux/types.h>
  12 #include <linux/module.h>
  13 #include <linux/device.h>
  14 #include <linux/delay.h>
  15 #include <linux/reboot.h>
  16 #include <linux/ctype.h>
  17 #include <asm/ipl.h>
  18 #include <asm/smp.h>
  19 #include <asm/setup.h>
  20 #include <asm/cpcmd.h>
  21 #include <asm/cio.h>
  22 #include <asm/ebcdic.h>
  23 #include <asm/reset.h>
  24 #include <asm/sclp.h>
  25
  26 #define IPL_PARM_BLOCK_VERSION 0
  27
  28 #define IPL_UNKNOWN_STR         "unknown"
  29 #define IPL_CCW_STR             "ccw"
  30 #define IPL_FCP_STR             "fcp"
  31 #define IPL_FCP_DUMP_STR        "fcp_dump"
  32 #define IPL_NSS_STR             "nss"
  33
  34 #define DUMP_CCW_STR            "ccw"
  35 #define DUMP_FCP_STR            "fcp"
  36 #define DUMP_NONE_STR           "none"
  37
  38 /*
  39  * Four shutdown trigger types are supported:
  40  * - panic
  41  * - halt
  42  * - power off
  43  * - reipl
  44  */
  45 #define ON_PANIC_STR            "on_panic"
  46 #define ON_HALT_STR             "on_halt"
  47 #define ON_POFF_STR             "on_poff"
  48 #define ON_REIPL_STR            "on_reboot"
  49
  50 struct shutdown_action;
  51 struct shutdown_trigger {
  52         char *name;
  53         struct shutdown_action *action;
  54 };
  55
  56 /*
  57  * Five shutdown action types are supported:
  58  */
  59 #define SHUTDOWN_ACTION_IPL_STR         "ipl"
  60 #define SHUTDOWN_ACTION_REIPL_STR       "reipl"
  61 #define SHUTDOWN_ACTION_DUMP_STR        "dump"
  62 #define SHUTDOWN_ACTION_VMCMD_STR       "vmcmd"
  63 #define SHUTDOWN_ACTION_STOP_STR        "stop"
  64
  65 struct shutdown_action {
  66         char *name;
  67         void (*fn) (struct shutdown_trigger *trigger);
  68         int (*init) (void);
  69 };
  70
  71 static char *ipl_type_str(enum ipl_type type)
  72 {
  73         switch (type) {
  74         case IPL_TYPE_CCW:
  75                 return IPL_CCW_STR;
  76         case IPL_TYPE_FCP:
  77                 return IPL_FCP_STR;
  78         case IPL_TYPE_FCP_DUMP:
  79                 return IPL_FCP_DUMP_STR;
  80         case IPL_TYPE_NSS:
  81                 return IPL_NSS_STR;
  82         case IPL_TYPE_UNKNOWN:
  83         default:
  84                 return IPL_UNKNOWN_STR;
  85         }
  86 }
  87
  88 enum dump_type {
  89         DUMP_TYPE_NONE  = 1,
  90         DUMP_TYPE_CCW   = 2,
  91         DUMP_TYPE_FCP   = 4,
  92 };
  93
  94 static char *dump_type_str(enum dump_type type)
  95 {
  96         switch (type) {
  97         case DUMP_TYPE_NONE:
  98                 return DUMP_NONE_STR;
  99         case DUMP_TYPE_CCW:
 100                 return DUMP_CCW_STR;
 101         case DUMP_TYPE_FCP:
 102                 return DUMP_FCP_STR;
 103         default:
 104                 return NULL;
 105         }
 106 }
 107
 108 /*
 109  * Must be in data section since the bss section
 110  * is not cleared when these are accessed.
 111  */
 112 static u16 ipl_devno __attribute__((__section__(".data"))) = 0;
 113 u32 ipl_flags __attribute__((__section__(".data"))) = 0;
 114
 115 enum ipl_method {
 116         REIPL_METHOD_CCW_CIO,
 117         REIPL_METHOD_CCW_DIAG,
 118         REIPL_METHOD_CCW_VM,
 119         REIPL_METHOD_FCP_RO_DIAG,
 120         REIPL_METHOD_FCP_RW_DIAG,
 121         REIPL_METHOD_FCP_RO_VM,
 122         REIPL_METHOD_FCP_DUMP,
 123         REIPL_METHOD_NSS,
 124         REIPL_METHOD_DEFAULT,
 125 };
 126
 127 enum dump_method {
 128         DUMP_METHOD_NONE,
 129         DUMP_METHOD_CCW_CIO,
 130         DUMP_METHOD_CCW_DIAG,
 131         DUMP_METHOD_CCW_VM,
 132         DUMP_METHOD_FCP_DIAG,
 133 };
 134
 135 static int diag308_set_works = 0;
 136
 137 static int reipl_capabilities = IPL_TYPE_UNKNOWN;
 138
 139 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
 140 static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
 141 static struct ipl_parameter_block *reipl_block_fcp;
 142 static struct ipl_parameter_block *reipl_block_ccw;
 143
 144 static char reipl_nss_name[NSS_NAME_SIZE + 1];
 145
 146 static int dump_capabilities = DUMP_TYPE_NONE;
 147 static enum dump_type dump_type = DUMP_TYPE_NONE;
 148 static enum dump_method dump_method = DUMP_METHOD_NONE;
 149 static struct ipl_parameter_block *dump_block_fcp;
 150 static struct ipl_parameter_block *dump_block_ccw;
 151
 152 static struct sclp_ipl_info sclp_ipl_info;
 153
 154 int diag308(unsigned long subcode, void *addr)
 155 {
 156         register unsigned long _addr asm("0") = (unsigned long) addr;
 157         register unsigned long _rc asm("1") = 0;
 158
 159         asm volatile(
 160                 "       diag    %0,%2,0x308\n"
 161                 "0:\n"
 162                 EX_TABLE(0b,0b)
 163                 : "+d" (_addr), "+d" (_rc)
 164                 : "d" (subcode) : "cc", "memory");
 165         return _rc;
 166 }
 167 EXPORT_SYMBOL_GPL(diag308);
 168
 169 /* SYSFS */
 170
 171 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value)             \
 172 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,     \
 173                 struct kobj_attribute *attr,                            \
 174                 char *page)                                             \
 175 {                                                                       \
 176         return sprintf(page, _format, _value);                          \
 177 }                                                                       \
 178 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 179         __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL);
 180
 181 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)   \
 182 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,     \
 183                 struct kobj_attribute *attr,                            \
 184                 char *page)                                             \
 185 {                                                                       \
 186         return sprintf(page, _fmt_out,                                  \
 187                         (unsigned long long) _value);                   \
 188 }                                                                       \
 189 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,    \
 190                 struct kobj_attribute *attr,                            \
 191                 const char *buf, size_t len)                            \
 192 {                                                                       \
 193         unsigned long long value;                                       \
 194         if (sscanf(buf, _fmt_in, &value) != 1)                          \
 195                 return -EINVAL;                                         \
 196         _value = value;                                                 \
 197         return len;                                                     \
 198 }                                                                       \
 199 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 200         __ATTR(_name,(S_IRUGO | S_IWUSR),                               \
 201                         sys_##_prefix##_##_name##_show,                 \
 202                         sys_##_prefix##_##_name##_store);
 203
 204 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
 205 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,     \
 206                 struct kobj_attribute *attr,                            \
 207                 char *page)                                             \
 208 {                                                                       \
 209         return sprintf(page, _fmt_out, _value);                         \
 210 }                                                                       \
 211 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,    \
 212                 struct kobj_attribute *attr,                            \
 213                 const char *buf, size_t len)                            \
 214 {                                                                       \
 215         strncpy(_value, buf, sizeof(_value) - 1);                       \
 216         strstrip(_value);                                               \
 217         return len;                                                     \
 218 }                                                                       \
 219 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 220         __ATTR(_name,(S_IRUGO | S_IWUSR),                               \
 221                         sys_##_prefix##_##_name##_show,                 \
 222                         sys_##_prefix##_##_name##_store);
 223
 224 static void make_attrs_ro(struct attribute **attrs)
 225 {
 226         while (*attrs) {
 227                 (*attrs)->mode = S_IRUGO;
 228                 attrs++;
 229         }
 230 }
 231
 232 /*
 233  * ipl section
 234  */
 235
 236 static __init enum ipl_type get_ipl_type(void)
 237 {
 238         struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
 239
 240         if (ipl_flags & IPL_NSS_VALID)
 241                 return IPL_TYPE_NSS;
 242         if (!(ipl_flags & IPL_DEVNO_VALID))
 243                 return IPL_TYPE_UNKNOWN;
 244         if (!(ipl_flags & IPL_PARMBLOCK_VALID))
 245                 return IPL_TYPE_CCW;
 246         if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
 247                 return IPL_TYPE_UNKNOWN;
 248         if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
 249                 return IPL_TYPE_UNKNOWN;
 250         if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
 251                 return IPL_TYPE_FCP_DUMP;
 252         return IPL_TYPE_FCP;
 253 }
 254
 255 struct ipl_info ipl_info;
 256 EXPORT_SYMBOL_GPL(ipl_info);
 257
 258 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
 259                              char *page)
 260 {
 261         return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
 262 }
 263
 264 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
 265
 266 static ssize_t sys_ipl_device_show(struct kobject *kobj,
 267                                    struct kobj_attribute *attr, char *page)
 268 {
 269         struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
 270
 271         switch (ipl_info.type) {
 272         case IPL_TYPE_CCW:
 273                 return sprintf(page, "0.0.%04x\n", ipl_devno);
 274         case IPL_TYPE_FCP:
 275         case IPL_TYPE_FCP_DUMP:
 276                 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
 277         default:
 278                 return 0;
 279         }
 280 }
 281
 282 static struct kobj_attribute sys_ipl_device_attr =
 283         __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
 284
 285 static ssize_t ipl_parameter_read(struct kobject *kobj, struct bin_attribute *attr,
 286                                   char *buf, loff_t off, size_t count)
 287 {
 288         unsigned int size = IPL_PARMBLOCK_SIZE;
 289
 290         if (off > size)
 291                 return 0;
 292         if (off + count > size)
 293                 count = size - off;
 294         memcpy(buf, (void *)IPL_PARMBLOCK_START + off, count);
 295         return count;
 296 }
 297
 298 static struct bin_attribute ipl_parameter_attr = {
 299         .attr = {
 300                 .name = "binary_parameter",
 301                 .mode = S_IRUGO,
 302         },
 303         .size = PAGE_SIZE,
 304         .read = &ipl_parameter_read,
 305 };
 306
 307 static ssize_t ipl_scp_data_read(struct kobject *kobj, struct bin_attribute *attr,
 308                                  char *buf, loff_t off, size_t count)
 309 {
 310         unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
 311         void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
 312
 313         if (off > size)
 314                 return 0;
 315         if (off + count > size)
 316                 count = size - off;
 317         memcpy(buf, scp_data + off, count);
 318         return count;
 319 }
 320
 321 static struct bin_attribute ipl_scp_data_attr = {
 322         .attr = {
 323                 .name = "scp_data",
 324                 .mode = S_IRUGO,
 325         },
 326         .size = PAGE_SIZE,
 327         .read = ipl_scp_data_read,
 328 };
 329
 330 /* FCP ipl device attributes */
 331
 332 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
 333                    IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
 334 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
 335                    IPL_PARMBLOCK_START->ipl_info.fcp.lun);
 336 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
 337                    IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
 338 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
 339                    IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
 340
 341 static struct attribute *ipl_fcp_attrs[] = {
 342         &sys_ipl_type_attr.attr,
 343         &sys_ipl_device_attr.attr,
 344         &sys_ipl_fcp_wwpn_attr.attr,
 345         &sys_ipl_fcp_lun_attr.attr,
 346         &sys_ipl_fcp_bootprog_attr.attr,
 347         &sys_ipl_fcp_br_lba_attr.attr,
 348         NULL,
 349 };
 350
 351 static struct attribute_group ipl_fcp_attr_group = {
 352         .attrs = ipl_fcp_attrs,
 353 };
 354
 355 /* CCW ipl device attributes */
 356
 357 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
 358                                      struct kobj_attribute *attr, char *page)
 359 {
 360         char loadparm[LOADPARM_LEN + 1] = {};
 361
 362         if (!sclp_ipl_info.is_valid)
 363                 return sprintf(page, "#unknown#\n");
 364         memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
 365         EBCASC(loadparm, LOADPARM_LEN);
 366         strstrip(loadparm);
 367         return sprintf(page, "%s\n", loadparm);
 368 }
 369
 370 static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
 371         __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
 372
 373 static struct attribute *ipl_ccw_attrs[] = {
 374         &sys_ipl_type_attr.attr,
 375         &sys_ipl_device_attr.attr,
 376         &sys_ipl_ccw_loadparm_attr.attr,
 377         NULL,
 378 };
 379
 380 static struct attribute_group ipl_ccw_attr_group = {
 381         .attrs = ipl_ccw_attrs,
 382 };
 383
 384 /* NSS ipl device attributes */
 385
 386 DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
 387
 388 static struct attribute *ipl_nss_attrs[] = {
 389         &sys_ipl_type_attr.attr,
 390         &sys_ipl_nss_name_attr.attr,
 391         NULL,
 392 };
 393
 394 static struct attribute_group ipl_nss_attr_group = {
 395         .attrs = ipl_nss_attrs,
 396 };
 397
 398 /* UNKNOWN ipl device attributes */
 399
 400 static struct attribute *ipl_unknown_attrs[] = {
 401         &sys_ipl_type_attr.attr,
 402         NULL,
 403 };
 404
 405 static struct attribute_group ipl_unknown_attr_group = {
 406         .attrs = ipl_unknown_attrs,
 407 };
 408
 409 static struct kset *ipl_kset;
 410
 411 static int __init ipl_register_fcp_files(void)
 412 {
 413         int rc;
 414
 415         rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
 416         if (rc)
 417                 goto out;
 418         rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
 419         if (rc)
 420                 goto out_ipl_parm;
 421         rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_scp_data_attr);
 422         if (!rc)
 423                 goto out;
 424
 425         sysfs_remove_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
 426
 427 out_ipl_parm:
 428         sysfs_remove_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
 429 out:
 430         return rc;
 431 }
 432
 433 static void ipl_run(struct shutdown_trigger *trigger)
 434 {
 435         diag308(DIAG308_IPL, NULL);
 436         if (MACHINE_IS_VM)
 437                 __cpcmd("IPL", NULL, 0, NULL);
 438         else if (ipl_info.type == IPL_TYPE_CCW)
 439                 reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
 440 }
 441
 442 static int ipl_init(void)
 443 {
 444         int rc;
 445
 446         ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
 447         if (!ipl_kset) {
 448                 rc = -ENOMEM;
 449                 goto out;
 450         }
 451         switch (ipl_info.type) {
 452         case IPL_TYPE_CCW:
 453                 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_ccw_attr_group);
 454                 break;
 455         case IPL_TYPE_FCP:
 456         case IPL_TYPE_FCP_DUMP:
 457                 rc = ipl_register_fcp_files();
 458                 break;
 459         case IPL_TYPE_NSS:
 460                 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group);
 461                 break;
 462         default:
 463                 rc = sysfs_create_group(&ipl_kset->kobj,
 464                                         &ipl_unknown_attr_group);
 465                 break;
 466         }
 467 out:
 468         if (rc)
 469                 panic("ipl_init failed: rc = %i\n", rc);
 470
 471         return 0;
 472 }
 473
 474 static struct shutdown_action ipl_action = {SHUTDOWN_ACTION_IPL_STR, ipl_run,
 475                                             ipl_init};
 476
 477 /*
 478  * reipl shutdown action: Reboot Linux on shutdown.
 479  */
 480
 481 /* FCP reipl device attributes */
 482
 483 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n",
 484                    reipl_block_fcp->ipl_info.fcp.wwpn);
 485 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n",
 486                    reipl_block_fcp->ipl_info.fcp.lun);
 487 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
 488                    reipl_block_fcp->ipl_info.fcp.bootprog);
 489 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
 490                    reipl_block_fcp->ipl_info.fcp.br_lba);
 491 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
 492                    reipl_block_fcp->ipl_info.fcp.devno);
 493
 494 static struct attribute *reipl_fcp_attrs[] = {
 495         &sys_reipl_fcp_device_attr.attr,
 496         &sys_reipl_fcp_wwpn_attr.attr,
 497         &sys_reipl_fcp_lun_attr.attr,
 498         &sys_reipl_fcp_bootprog_attr.attr,
 499         &sys_reipl_fcp_br_lba_attr.attr,
 500         NULL,
 501 };
 502
 503 static struct attribute_group reipl_fcp_attr_group = {
 504         .name  = IPL_FCP_STR,
 505         .attrs = reipl_fcp_attrs,
 506 };
 507
 508 /* CCW reipl device attributes */
 509
 510 DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
 511         reipl_block_ccw->ipl_info.ccw.devno);
 512
 513 static void reipl_get_ascii_loadparm(char *loadparm)
 514 {
 515         memcpy(loadparm, &reipl_block_ccw->ipl_info.ccw.load_param,
 516                LOADPARM_LEN);
 517         EBCASC(loadparm, LOADPARM_LEN);
 518         loadparm[LOADPARM_LEN] = 0;
 519         strstrip(loadparm);
 520 }
 521
 522 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
 523                                        struct kobj_attribute *attr, char *page)
 524 {
 525         char buf[LOADPARM_LEN + 1];
 526
 527         reipl_get_ascii_loadparm(buf);
 528         return sprintf(page, "%s\n", buf);
 529 }
 530
 531 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
 532                                         struct kobj_attribute *attr,
 533                                         const char *buf, size_t len)
 534 {
 535         int i, lp_len;
 536
 537         /* ignore trailing newline */
 538         lp_len = len;
 539         if ((len > 0) && (buf[len - 1] == '\n'))
 540                 lp_len--;
 541         /* loadparm can have max 8 characters and must not start with a blank */
 542         if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
 543                 return -EINVAL;
 544         /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
 545         for (i = 0; i < lp_len; i++) {
 546                 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
 547                     (buf[i] == '.'))
 548                         continue;
 549                 return -EINVAL;
 550         }
 551         /* initialize loadparm with blanks */
 552         memset(&reipl_block_ccw->ipl_info.ccw.load_param, ' ', LOADPARM_LEN);
 553         /* copy and convert to ebcdic */
 554         memcpy(&reipl_block_ccw->ipl_info.ccw.load_param, buf, lp_len);
 555         ASCEBC(reipl_block_ccw->ipl_info.ccw.load_param, LOADPARM_LEN);
 556         return len;
 557 }
 558
 559 static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
 560         __ATTR(loadparm, 0644, reipl_ccw_loadparm_show,
 561                reipl_ccw_loadparm_store);
 562
 563 static struct attribute *reipl_ccw_attrs[] = {
 564         &sys_reipl_ccw_device_attr.attr,
 565         &sys_reipl_ccw_loadparm_attr.attr,
 566         NULL,
 567 };
 568
 569 static struct attribute_group reipl_ccw_attr_group = {
 570         .name  = IPL_CCW_STR,
 571         .attrs = reipl_ccw_attrs,
 572 };
 573
 574
 575 /* NSS reipl device attributes */
 576
 577 DEFINE_IPL_ATTR_STR_RW(reipl_nss, name, "%s\n", "%s\n", reipl_nss_name);
 578
 579 static struct attribute *reipl_nss_attrs[] = {
 580         &sys_reipl_nss_name_attr.attr,
 581         NULL,
 582 };
 583
 584 static struct attribute_group reipl_nss_attr_group = {
 585         .name  = IPL_NSS_STR,
 586         .attrs = reipl_nss_attrs,
 587 };
 588
 589 /* reipl type */
 590
 591 static int reipl_set_type(enum ipl_type type)
 592 {
 593         if (!(reipl_capabilities & type))
 594                 return -EINVAL;
 595
 596         switch(type) {
 597         case IPL_TYPE_CCW:
 598                 if (diag308_set_works)
 599                         reipl_method = REIPL_METHOD_CCW_DIAG;
 600                 else if (MACHINE_IS_VM)
 601                         reipl_method = REIPL_METHOD_CCW_VM;
 602                 else
 603                         reipl_method = REIPL_METHOD_CCW_CIO;
 604                 break;
 605         case IPL_TYPE_FCP:
 606                 if (diag308_set_works)
 607                         reipl_method = REIPL_METHOD_FCP_RW_DIAG;
 608                 else if (MACHINE_IS_VM)
 609                         reipl_method = REIPL_METHOD_FCP_RO_VM;
 610                 else
 611                         reipl_method = REIPL_METHOD_FCP_RO_DIAG;
 612                 break;
 613         case IPL_TYPE_FCP_DUMP:
 614                 reipl_method = REIPL_METHOD_FCP_DUMP;
 615                 break;
 616         case IPL_TYPE_NSS:
 617                 reipl_method = REIPL_METHOD_NSS;
 618                 break;
 619         case IPL_TYPE_UNKNOWN:
 620                 reipl_method = REIPL_METHOD_DEFAULT;
 621                 break;
 622         default:
 623                 BUG();
 624         }
 625         reipl_type = type;
 626         return 0;
 627 }
 628
 629 static ssize_t reipl_type_show(struct kobject *kobj,
 630                                struct kobj_attribute *attr, char *page)
 631 {
 632         return sprintf(page, "%s\n", ipl_type_str(reipl_type));
 633 }
 634
 635 static ssize_t reipl_type_store(struct kobject *kobj,
 636                                 struct kobj_attribute *attr,
 637                                 const char *buf, size_t len)
 638 {
 639         int rc = -EINVAL;
 640
 641         if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
 642                 rc = reipl_set_type(IPL_TYPE_CCW);
 643         else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
 644                 rc = reipl_set_type(IPL_TYPE_FCP);
 645         else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
 646                 rc = reipl_set_type(IPL_TYPE_NSS);
 647         return (rc != 0) ? rc : len;
 648 }
 649
 650 static struct kobj_attribute reipl_type_attr =
 651         __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
 652
 653 static struct kset *reipl_kset;
 654
 655 void reipl_run(struct shutdown_trigger *trigger)
 656 {
 657         struct ccw_dev_id devid;
 658         static char buf[100];
 659         char loadparm[LOADPARM_LEN + 1];
 660
 661         switch (reipl_method) {
 662         case REIPL_METHOD_CCW_CIO:
 663                 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
 664                 devid.ssid  = 0;
 665                 reipl_ccw_dev(&devid);
 666                 break;
 667         case REIPL_METHOD_CCW_VM:
 668                 reipl_get_ascii_loadparm(loadparm);
 669                 if (strlen(loadparm) == 0)
 670                         sprintf(buf, "IPL %X CLEAR",
 671                                 reipl_block_ccw->ipl_info.ccw.devno);
 672                 else
 673                         sprintf(buf, "IPL %X CLEAR LOADPARM '%s'",
 674                                 reipl_block_ccw->ipl_info.ccw.devno, loadparm);
 675                 __cpcmd(buf, NULL, 0, NULL);
 676                 break;
 677         case REIPL_METHOD_CCW_DIAG:
 678                 diag308(DIAG308_SET, reipl_block_ccw);
 679                 diag308(DIAG308_IPL, NULL);
 680                 break;
 681         case REIPL_METHOD_FCP_RW_DIAG:
 682                 diag308(DIAG308_SET, reipl_block_fcp);
 683                 diag308(DIAG308_IPL, NULL);
 684                 break;
 685         case REIPL_METHOD_FCP_RO_DIAG:
 686                 diag308(DIAG308_IPL, NULL);
 687                 break;
 688         case REIPL_METHOD_FCP_RO_VM:
 689                 __cpcmd("IPL", NULL, 0, NULL);
 690                 break;
 691         case REIPL_METHOD_NSS:
 692                 sprintf(buf, "IPL %s", reipl_nss_name);
 693                 __cpcmd(buf, NULL, 0, NULL);
 694                 break;
 695         case REIPL_METHOD_DEFAULT:
 696                 if (MACHINE_IS_VM)
 697                         __cpcmd("IPL", NULL, 0, NULL);
 698                 diag308(DIAG308_IPL, NULL);
 699                 break;
 700         case REIPL_METHOD_FCP_DUMP:
 701         default:
 702                 break;
 703         }
 704 }
 705
 706 static void __init reipl_probe(void)
 707 {
 708         void *buffer;
 709
 710         buffer = (void *) get_zeroed_page(GFP_KERNEL);
 711         if (!buffer)
 712                 return;
 713         if (diag308(DIAG308_STORE, buffer) == DIAG308_RC_OK)
 714                 diag308_set_works = 1;
 715         free_page((unsigned long)buffer);
 716 }
 717
 718 static int __init reipl_nss_init(void)
 719 {
 720         int rc;
 721
 722         if (!MACHINE_IS_VM)
 723                 return 0;
 724         rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
 725         if (rc)
 726                 return rc;
 727         strncpy(reipl_nss_name, kernel_nss_name, NSS_NAME_SIZE + 1);
 728         reipl_capabilities |= IPL_TYPE_NSS;
 729         return 0;
 730 }
 731
 732 static int __init reipl_ccw_init(void)
 733 {
 734         int rc;
 735
 736         reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
 737         if (!reipl_block_ccw)
 738                 return -ENOMEM;
 739         rc = sysfs_create_group(&reipl_kset->kobj, &reipl_ccw_attr_group);
 740         if (rc) {
 741                 free_page((unsigned long)reipl_block_ccw);
 742                 return rc;
 743         }
 744         reipl_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
 745         reipl_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
 746         reipl_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
 747         reipl_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
 748         reipl_block_ccw->hdr.flags = DIAG308_FLAGS_LP_VALID;
 749         /* check if read scp info worked and set loadparm */
 750         if (sclp_ipl_info.is_valid)
 751                 memcpy(reipl_block_ccw->ipl_info.ccw.load_param,
 752                        &sclp_ipl_info.loadparm, LOADPARM_LEN);
 753         else
 754                 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
 755                 memset(reipl_block_ccw->ipl_info.ccw.load_param, 0x40,
 756                        LOADPARM_LEN);
 757         if (!MACHINE_IS_VM && !diag308_set_works)
 758                 sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
 759         if (ipl_info.type == IPL_TYPE_CCW)
 760                 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
 761         reipl_capabilities |= IPL_TYPE_CCW;
 762         return 0;
 763 }
 764
 765 static int __init reipl_fcp_init(void)
 766 {
 767         int rc;
 768
 769         if ((!diag308_set_works) && (ipl_info.type != IPL_TYPE_FCP))
 770                 return 0;
 771         if ((!diag308_set_works) && (ipl_info.type == IPL_TYPE_FCP))
 772                 make_attrs_ro(reipl_fcp_attrs);
 773
 774         reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
 775         if (!reipl_block_fcp)
 776                 return -ENOMEM;
 777         rc = sysfs_create_group(&reipl_kset->kobj, &reipl_fcp_attr_group);
 778         if (rc) {
 779                 free_page((unsigned long)reipl_block_fcp);
 780                 return rc;
 781         }
 782         if (ipl_info.type == IPL_TYPE_FCP) {
 783                 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
 784         } else {
 785                 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
 786                 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
 787                 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
 788                 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
 789                 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
 790         }
 791         reipl_capabilities |= IPL_TYPE_FCP;
 792         return 0;
 793 }
 794
 795 static int reipl_init(void)
 796 {
 797         int rc;
 798
 799         reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
 800         if (!reipl_kset)
 801                 return -ENOMEM;
 802         rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
 803         if (rc) {
 804                 kset_unregister(reipl_kset);
 805                 return rc;
 806         }
 807         rc = reipl_ccw_init();
 808         if (rc)
 809                 return rc;
 810         rc = reipl_fcp_init();
 811         if (rc)
 812                 return rc;
 813         rc = reipl_nss_init();
 814         if (rc)
 815                 return rc;
 816         rc = reipl_set_type(ipl_info.type);
 817         if (rc)
 818                 return rc;
 819         return 0;
 820 }
 821
 822 static struct shutdown_action reipl_action = {SHUTDOWN_ACTION_REIPL_STR,
 823                                               reipl_run, reipl_init};
 824
 825 /*
 826  * dump shutdown action: Dump Linux on shutdown.
 827  */
 828
 829 /* FCP dump device attributes */
 830
 831 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n",
 832                    dump_block_fcp->ipl_info.fcp.wwpn);
 833 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n",
 834                    dump_block_fcp->ipl_info.fcp.lun);
 835 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
 836                    dump_block_fcp->ipl_info.fcp.bootprog);
 837 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
 838                    dump_block_fcp->ipl_info.fcp.br_lba);
 839 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
 840                    dump_block_fcp->ipl_info.fcp.devno);
 841
 842 static struct attribute *dump_fcp_attrs[] = {
 843         &sys_dump_fcp_device_attr.attr,
 844         &sys_dump_fcp_wwpn_attr.attr,
 845         &sys_dump_fcp_lun_attr.attr,
 846         &sys_dump_fcp_bootprog_attr.attr,
 847         &sys_dump_fcp_br_lba_attr.attr,
 848         NULL,
 849 };
 850
 851 static struct attribute_group dump_fcp_attr_group = {
 852         .name  = IPL_FCP_STR,
 853         .attrs = dump_fcp_attrs,
 854 };
 855
 856 /* CCW dump device attributes */
 857
 858 DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
 859                    dump_block_ccw->ipl_info.ccw.devno);
 860
 861 static struct attribute *dump_ccw_attrs[] = {
 862         &sys_dump_ccw_device_attr.attr,
 863         NULL,
 864 };
 865
 866 static struct attribute_group dump_ccw_attr_group = {
 867         .name  = IPL_CCW_STR,
 868         .attrs = dump_ccw_attrs,
 869 };
 870
 871 /* dump type */
 872
 873 static int dump_set_type(enum dump_type type)
 874 {
 875         if (!(dump_capabilities & type))
 876                 return -EINVAL;
 877         switch (type) {
 878         case DUMP_TYPE_CCW:
 879                 if (diag308_set_works)
 880                         dump_method = DUMP_METHOD_CCW_DIAG;
 881                 else if (MACHINE_IS_VM)
 882                         dump_method = DUMP_METHOD_CCW_VM;
 883                 else
 884                         dump_method = DUMP_METHOD_CCW_CIO;
 885                 break;
 886         case DUMP_TYPE_FCP:
 887                 dump_method = DUMP_METHOD_FCP_DIAG;
 888                 break;
 889         default:
 890                 dump_method = DUMP_METHOD_NONE;
 891         }
 892         dump_type = type;
 893         return 0;
 894 }
 895
 896 static ssize_t dump_type_show(struct kobject *kobj,
 897                               struct kobj_attribute *attr, char *page)
 898 {
 899         return sprintf(page, "%s\n", dump_type_str(dump_type));
 900 }
 901
 902 static ssize_t dump_type_store(struct kobject *kobj,
 903                                struct kobj_attribute *attr,
 904                                const char *buf, size_t len)
 905 {
 906         int rc = -EINVAL;
 907
 908         if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
 909                 rc = dump_set_type(DUMP_TYPE_NONE);
 910         else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
 911                 rc = dump_set_type(DUMP_TYPE_CCW);
 912         else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
 913                 rc = dump_set_type(DUMP_TYPE_FCP);
 914         return (rc != 0) ? rc : len;
 915 }
 916
 917 static struct kobj_attribute dump_type_attr =
 918         __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
 919
 920 static struct kset *dump_kset;
 921
 922 static void dump_run(struct shutdown_trigger *trigger)
 923 {
 924         struct ccw_dev_id devid;
 925         static char buf[100];
 926
 927         switch (dump_method) {
 928         case DUMP_METHOD_CCW_CIO:
 929                 smp_send_stop();
 930                 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
 931                 devid.ssid  = 0;
 932                 reipl_ccw_dev(&devid);
 933                 break;
 934         case DUMP_METHOD_CCW_VM:
 935                 smp_send_stop();
 936                 sprintf(buf, "STORE STATUS");
 937                 __cpcmd(buf, NULL, 0, NULL);
 938                 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
 939                 __cpcmd(buf, NULL, 0, NULL);
 940                 break;
 941         case DUMP_METHOD_CCW_DIAG:
 942                 diag308(DIAG308_SET, dump_block_ccw);
 943                 diag308(DIAG308_DUMP, NULL);
 944                 break;
 945         case DUMP_METHOD_FCP_DIAG:
 946                 diag308(DIAG308_SET, dump_block_fcp);
 947                 diag308(DIAG308_DUMP, NULL);
 948                 break;
 949         case DUMP_METHOD_NONE:
 950         default:
 951                 return;
 952         }
 953         printk(KERN_EMERG "Dump failed!\n");
 954 }
 955
 956 static int __init dump_ccw_init(void)
 957 {
 958         int rc;
 959
 960         dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
 961         if (!dump_block_ccw)
 962                 return -ENOMEM;
 963         rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
 964         if (rc) {
 965                 free_page((unsigned long)dump_block_ccw);
 966                 return rc;
 967         }
 968         dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
 969         dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
 970         dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
 971         dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
 972         dump_capabilities |= DUMP_TYPE_CCW;
 973         return 0;
 974 }
 975
 976 static int __init dump_fcp_init(void)
 977 {
 978         int rc;
 979
 980         if (!sclp_ipl_info.has_dump)
 981                 return 0; /* LDIPL DUMP is not installed */
 982         if (!diag308_set_works)
 983                 return 0;
 984         dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
 985         if (!dump_block_fcp)
 986                 return -ENOMEM;
 987         rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
 988         if (rc) {
 989                 free_page((unsigned long)dump_block_fcp);
 990                 return rc;
 991         }
 992         dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
 993         dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
 994         dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
 995         dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
 996         dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
 997         dump_capabilities |= DUMP_TYPE_FCP;
 998         return 0;
 999 }
1000
1001 static int dump_init(void)
1002 {
1003         int rc;
1004
1005         dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1006         if (!dump_kset)
1007                 return -ENOMEM;
1008         rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1009         if (rc) {
1010                 kset_unregister(dump_kset);
1011                 return rc;
1012         }
1013         rc = dump_ccw_init();
1014         if (rc)
1015                 return rc;
1016         rc = dump_fcp_init();
1017         if (rc)
1018                 return rc;
1019         dump_set_type(DUMP_TYPE_NONE);
1020         return 0;
1021 }
1022
1023 static struct shutdown_action dump_action = {SHUTDOWN_ACTION_DUMP_STR,
1024                                              dump_run, dump_init};
1025
1026 /*
1027  * vmcmd shutdown action: Trigger vm command on shutdown.
1028  */
1029
1030 static char vmcmd_on_reboot[128];
1031 static char vmcmd_on_panic[128];
1032 static char vmcmd_on_halt[128];
1033 static char vmcmd_on_poff[128];
1034
1035 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1036 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1037 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1038 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1039
1040 static struct attribute *vmcmd_attrs[] = {
1041         &sys_vmcmd_on_reboot_attr.attr,
1042         &sys_vmcmd_on_panic_attr.attr,
1043         &sys_vmcmd_on_halt_attr.attr,
1044         &sys_vmcmd_on_poff_attr.attr,
1045         NULL,
1046 };
1047
1048 static struct attribute_group vmcmd_attr_group = {
1049         .attrs = vmcmd_attrs,
1050 };
1051
1052 static struct kset *vmcmd_kset;
1053
1054 static void vmcmd_run(struct shutdown_trigger *trigger)
1055 {
1056         char *cmd, *next_cmd;
1057
1058         if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1059                 cmd = vmcmd_on_reboot;
1060         else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1061                 cmd = vmcmd_on_panic;
1062         else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1063                 cmd = vmcmd_on_halt;
1064         else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1065                 cmd = vmcmd_on_poff;
1066         else
1067                 return;
1068
1069         if (strlen(cmd) == 0)
1070                 return;
1071         do {
1072                 next_cmd = strchr(cmd, '\n');
1073                 if (next_cmd) {
1074                         next_cmd[0] = 0;
1075                         next_cmd += 1;
1076                 }
1077                 __cpcmd(cmd, NULL, 0, NULL);
1078                 cmd = next_cmd;
1079         } while (cmd != NULL);
1080 }
1081
1082 static int vmcmd_init(void)
1083 {
1084         if (!MACHINE_IS_VM)
1085                 return -ENOTSUPP;
1086         vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1087         if (!vmcmd_kset)
1088                 return -ENOMEM;
1089         return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1090 }
1091
1092 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1093                                               vmcmd_run, vmcmd_init};
1094
1095 /*
1096  * stop shutdown action: Stop Linux on shutdown.
1097  */
1098
1099 static void stop_run(struct shutdown_trigger *trigger)
1100 {
1101         if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1102                 disabled_wait((unsigned long) __builtin_return_address(0));
1103         else {
1104                 signal_processor(smp_processor_id(), sigp_stop);
1105                 for (;;);
1106         }
1107 }
1108
1109 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1110                                              stop_run, NULL};
1111
1112 /* action list */
1113
1114 static struct shutdown_action *shutdown_actions_list[] = {
1115         &ipl_action, &reipl_action, &dump_action, &vmcmd_action, &stop_action};
1116 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1117
1118 /*
1119  * Trigger section
1120  */
1121
1122 static struct kset *shutdown_actions_kset;
1123
1124 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1125                        size_t len)
1126 {
1127         int i;
1128         for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1129                 if (!shutdown_actions_list[i])
1130                         continue;
1131                 if (strncmp(buf, shutdown_actions_list[i]->name,
1132                             strlen(shutdown_actions_list[i]->name)) == 0) {
1133                         trigger->action = shutdown_actions_list[i];
1134                         return len;
1135                 }
1136         }
1137         return -EINVAL;
1138 }
1139
1140 /* on reipl */
1141
1142 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1143                                                     &reipl_action};
1144
1145 static ssize_t on_reboot_show(struct kobject *kobj,
1146                               struct kobj_attribute *attr, char *page)
1147 {
1148         return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1149 }
1150
1151 static ssize_t on_reboot_store(struct kobject *kobj,
1152                                struct kobj_attribute *attr,
1153                                const char *buf, size_t len)
1154 {
1155         return set_trigger(buf, &on_reboot_trigger, len);
1156 }
1157
1158 static struct kobj_attribute on_reboot_attr =
1159         __ATTR(on_reboot, 0644, on_reboot_show, on_reboot_store);
1160
1161 static void do_machine_restart(char *__unused)
1162 {
1163         smp_send_stop();
1164         on_reboot_trigger.action->fn(&on_reboot_trigger);
1165         reipl_run(NULL);
1166 }
1167 void (*_machine_restart)(char *command) = do_machine_restart;
1168
1169 /* on panic */
1170
1171 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1172
1173 static ssize_t on_panic_show(struct kobject *kobj,
1174                              struct kobj_attribute *attr, char *page)
1175 {
1176         return sprintf(page, "%s\n", on_panic_trigger.action->name);
1177 }
1178
1179 static ssize_t on_panic_store(struct kobject *kobj,
1180                               struct kobj_attribute *attr,
1181                               const char *buf, size_t len)
1182 {
1183         return set_trigger(buf, &on_panic_trigger, len);
1184 }
1185
1186 static struct kobj_attribute on_panic_attr =
1187         __ATTR(on_panic, 0644, on_panic_show, on_panic_store);
1188
1189 static void do_panic(void)
1190 {
1191         on_panic_trigger.action->fn(&on_panic_trigger);
1192         stop_run(&on_panic_trigger);
1193 }
1194
1195 /* on halt */
1196
1197 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1198
1199 static ssize_t on_halt_show(struct kobject *kobj,
1200                             struct kobj_attribute *attr, char *page)
1201 {
1202         return sprintf(page, "%s\n", on_halt_trigger.action->name);
1203 }
1204
1205 static ssize_t on_halt_store(struct kobject *kobj,
1206                              struct kobj_attribute *attr,
1207                              const char *buf, size_t len)
1208 {
1209         return set_trigger(buf, &on_halt_trigger, len);
1210 }
1211
1212 static struct kobj_attribute on_halt_attr =
1213         __ATTR(on_halt, 0644, on_halt_show, on_halt_store);
1214
1215
1216 static void do_machine_halt(void)
1217 {
1218         smp_send_stop();
1219         on_halt_trigger.action->fn(&on_halt_trigger);
1220         stop_run(&on_halt_trigger);
1221 }
1222 void (*_machine_halt)(void) = do_machine_halt;
1223
1224 /* on power off */
1225
1226 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1227
1228 static ssize_t on_poff_show(struct kobject *kobj,
1229                             struct kobj_attribute *attr, char *page)
1230 {
1231         return sprintf(page, "%s\n", on_poff_trigger.action->name);
1232 }
1233
1234 static ssize_t on_poff_store(struct kobject *kobj,
1235                              struct kobj_attribute *attr,
1236                              const char *buf, size_t len)
1237 {
1238         return set_trigger(buf, &on_poff_trigger, len);
1239 }
1240
1241 static struct kobj_attribute on_poff_attr =
1242         __ATTR(on_poff, 0644, on_poff_show, on_poff_store);
1243
1244
1245 static void do_machine_power_off(void)
1246 {
1247         smp_send_stop();
1248         on_poff_trigger.action->fn(&on_poff_trigger);
1249         stop_run(&on_poff_trigger);
1250 }
1251 void (*_machine_power_off)(void) = do_machine_power_off;
1252
1253 static void __init shutdown_triggers_init(void)
1254 {
1255         shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1256                                                     firmware_kobj);
1257         if (!shutdown_actions_kset)
1258                 goto fail;
1259         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1260                               &on_reboot_attr.attr))
1261                 goto fail;
1262         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1263                               &on_panic_attr.attr))
1264                 goto fail;
1265         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1266                               &on_halt_attr.attr))
1267                 goto fail;
1268         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1269                               &on_poff_attr.attr))
1270                 goto fail;
1271
1272         return;
1273 fail:
1274         panic("shutdown_triggers_init failed\n");
1275 }
1276
1277 static void __init shutdown_actions_init(void)
1278 {
1279         int i;
1280
1281         for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1282                 if (!shutdown_actions_list[i]->init)
1283                         continue;
1284                 if (shutdown_actions_list[i]->init())
1285                         shutdown_actions_list[i] = NULL;
1286         }
1287 }
1288
1289 static int __init s390_ipl_init(void)
1290 {
1291         reipl_probe();
1292         sclp_get_ipl_info(&sclp_ipl_info);
1293         shutdown_actions_init();
1294         shutdown_triggers_init();
1295         return 0;
1296 }
1297
1298 __initcall(s390_ipl_init);
1299
1300 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1301 {
1302         int sx, dx;
1303
1304         dx = 0;
1305         for (sx = 0; src[sx] != 0; sx++) {
1306                 if (src[sx] == '"')
1307                         continue;
1308                 dst[dx++] = src[sx];
1309                 if (dx >= n)
1310                         break;
1311         }
1312 }
1313
1314 static int __init vmcmd_on_reboot_setup(char *str)
1315 {
1316         if (!MACHINE_IS_VM)
1317                 return 1;
1318         strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1319         vmcmd_on_reboot[127] = 0;
1320         on_reboot_trigger.action = &vmcmd_action;
1321         return 1;
1322 }
1323 __setup("vmreboot=", vmcmd_on_reboot_setup);
1324
1325 static int __init vmcmd_on_panic_setup(char *str)
1326 {
1327         if (!MACHINE_IS_VM)
1328                 return 1;
1329         strncpy_skip_quote(vmcmd_on_panic, str, 127);
1330         vmcmd_on_panic[127] = 0;
1331         on_panic_trigger.action = &vmcmd_action;
1332         return 1;
1333 }
1334 __setup("vmpanic=", vmcmd_on_panic_setup);
1335
1336 static int __init vmcmd_on_halt_setup(char *str)
1337 {
1338         if (!MACHINE_IS_VM)
1339                 return 1;
1340         strncpy_skip_quote(vmcmd_on_halt, str, 127);
1341         vmcmd_on_halt[127] = 0;
1342         on_halt_trigger.action = &vmcmd_action;
1343         return 1;
1344 }
1345 __setup("vmhalt=", vmcmd_on_halt_setup);
1346
1347 static int __init vmcmd_on_poff_setup(char *str)
1348 {
1349         if (!MACHINE_IS_VM)
1350                 return 1;
1351         strncpy_skip_quote(vmcmd_on_poff, str, 127);
1352         vmcmd_on_poff[127] = 0;
1353         on_poff_trigger.action = &vmcmd_action;
1354         return 1;
1355 }
1356 __setup("vmpoff=", vmcmd_on_poff_setup);
1357
1358 static int on_panic_notify(struct notifier_block *self,
1359                            unsigned long event, void *data)
1360 {
1361         do_panic();
1362         return NOTIFY_OK;
1363 }
1364
1365 static struct notifier_block on_panic_nb = {
1366         .notifier_call = on_panic_notify,
1367         .priority = 0,
1368 };
1369
1370 void __init setup_ipl(void)
1371 {
1372         ipl_info.type = get_ipl_type();
1373         switch (ipl_info.type) {
1374         case IPL_TYPE_CCW:
1375                 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1376                 ipl_info.data.ccw.dev_id.ssid = 0;
1377                 break;
1378         case IPL_TYPE_FCP:
1379         case IPL_TYPE_FCP_DUMP:
1380                 ipl_info.data.fcp.dev_id.devno =
1381                         IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1382                 ipl_info.data.fcp.dev_id.ssid = 0;
1383                 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1384                 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1385                 break;
1386         case IPL_TYPE_NSS:
1387                 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1388                         sizeof(ipl_info.data.nss.name));
1389                 break;
1390         case IPL_TYPE_UNKNOWN:
1391         default:
1392                 /* We have no info to copy */
1393                 break;
1394         }
1395         atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1396 }
1397
1398 void __init ipl_save_parameters(void)
1399 {
1400         struct cio_iplinfo iplinfo;
1401         unsigned int *ipl_ptr;
1402         void *src, *dst;
1403
1404         if (cio_get_iplinfo(&iplinfo))
1405                 return;
1406
1407         ipl_devno = iplinfo.devno;
1408         ipl_flags |= IPL_DEVNO_VALID;
1409         if (!iplinfo.is_qdio)
1410                 return;
1411         ipl_flags |= IPL_PARMBLOCK_VALID;
1412         ipl_ptr = (unsigned int *)__LC_IPL_PARMBLOCK_PTR;
1413         src = (void *)(unsigned long)*ipl_ptr;
1414         dst = (void *)IPL_PARMBLOCK_ORIGIN;
1415         memmove(dst, src, PAGE_SIZE);
1416         *ipl_ptr = IPL_PARMBLOCK_ORIGIN;
1417 }
1418
1419 static LIST_HEAD(rcall);
1420 static DEFINE_MUTEX(rcall_mutex);
1421
1422 void register_reset_call(struct reset_call *reset)
1423 {
1424         mutex_lock(&rcall_mutex);
1425         list_add(&reset->list, &rcall);
1426         mutex_unlock(&rcall_mutex);
1427 }
1428 EXPORT_SYMBOL_GPL(register_reset_call);
1429
1430 void unregister_reset_call(struct reset_call *reset)
1431 {
1432         mutex_lock(&rcall_mutex);
1433         list_del(&reset->list);
1434         mutex_unlock(&rcall_mutex);
1435 }
1436 EXPORT_SYMBOL_GPL(unregister_reset_call);
1437
1438 static void do_reset_calls(void)
1439 {
1440         struct reset_call *reset;
1441
1442         list_for_each_entry(reset, &rcall, list)
1443                 reset->fn();
1444 }
1445
1446 u32 dump_prefix_page;
1447
1448 void s390_reset_system(void)
1449 {
1450         struct _lowcore *lc;
1451
1452         lc = (struct _lowcore *)(unsigned long) store_prefix();
1453
1454         /* Stack for interrupt/machine check handler */
1455         lc->panic_stack = S390_lowcore.panic_stack;
1456
1457         /* Save prefix page address for dump case */
1458         dump_prefix_page = (u32)(unsigned long) lc;
1459
1460         /* Disable prefixing */
1461         set_prefix(0);
1462
1463         /* Disable lowcore protection */
1464         __ctl_clear_bit(0,28);
1465
1466         /* Set new machine check handler */
1467         S390_lowcore.mcck_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
1468         S390_lowcore.mcck_new_psw.addr =
1469                 PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;
1470
1471         /* Set new program check handler */
1472         S390_lowcore.program_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
1473         S390_lowcore.program_new_psw.addr =
1474                 PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
1475
1476         do_reset_calls();
1477 }
1478