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   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 __init 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 __refdata ipl_action = {
 475         .name   = SHUTDOWN_ACTION_IPL_STR,
 476         .fn     = ipl_run,
 477         .init   = ipl_init,
 478 };
 479
 480 /*
 481  * reipl shutdown action: Reboot Linux on shutdown.
 482  */
 483
 484 /* FCP reipl device attributes */
 485
 486 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n",
 487                    reipl_block_fcp->ipl_info.fcp.wwpn);
 488 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n",
 489                    reipl_block_fcp->ipl_info.fcp.lun);
 490 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
 491                    reipl_block_fcp->ipl_info.fcp.bootprog);
 492 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
 493                    reipl_block_fcp->ipl_info.fcp.br_lba);
 494 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
 495                    reipl_block_fcp->ipl_info.fcp.devno);
 496
 497 static struct attribute *reipl_fcp_attrs[] = {
 498         &sys_reipl_fcp_device_attr.attr,
 499         &sys_reipl_fcp_wwpn_attr.attr,
 500         &sys_reipl_fcp_lun_attr.attr,
 501         &sys_reipl_fcp_bootprog_attr.attr,
 502         &sys_reipl_fcp_br_lba_attr.attr,
 503         NULL,
 504 };
 505
 506 static struct attribute_group reipl_fcp_attr_group = {
 507         .name  = IPL_FCP_STR,
 508         .attrs = reipl_fcp_attrs,
 509 };
 510
 511 /* CCW reipl device attributes */
 512
 513 DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
 514         reipl_block_ccw->ipl_info.ccw.devno);
 515
 516 static void reipl_get_ascii_loadparm(char *loadparm)
 517 {
 518         memcpy(loadparm, &reipl_block_ccw->ipl_info.ccw.load_param,
 519                LOADPARM_LEN);
 520         EBCASC(loadparm, LOADPARM_LEN);
 521         loadparm[LOADPARM_LEN] = 0;
 522         strstrip(loadparm);
 523 }
 524
 525 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
 526                                        struct kobj_attribute *attr, char *page)
 527 {
 528         char buf[LOADPARM_LEN + 1];
 529
 530         reipl_get_ascii_loadparm(buf);
 531         return sprintf(page, "%s\n", buf);
 532 }
 533
 534 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
 535                                         struct kobj_attribute *attr,
 536                                         const char *buf, size_t len)
 537 {
 538         int i, lp_len;
 539
 540         /* ignore trailing newline */
 541         lp_len = len;
 542         if ((len > 0) && (buf[len - 1] == '\n'))
 543                 lp_len--;
 544         /* loadparm can have max 8 characters and must not start with a blank */
 545         if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
 546                 return -EINVAL;
 547         /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
 548         for (i = 0; i < lp_len; i++) {
 549                 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
 550                     (buf[i] == '.'))
 551                         continue;
 552                 return -EINVAL;
 553         }
 554         /* initialize loadparm with blanks */
 555         memset(&reipl_block_ccw->ipl_info.ccw.load_param, ' ', LOADPARM_LEN);
 556         /* copy and convert to ebcdic */
 557         memcpy(&reipl_block_ccw->ipl_info.ccw.load_param, buf, lp_len);
 558         ASCEBC(reipl_block_ccw->ipl_info.ccw.load_param, LOADPARM_LEN);
 559         return len;
 560 }
 561
 562 static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
 563         __ATTR(loadparm, 0644, reipl_ccw_loadparm_show,
 564                reipl_ccw_loadparm_store);
 565
 566 static struct attribute *reipl_ccw_attrs[] = {
 567         &sys_reipl_ccw_device_attr.attr,
 568         &sys_reipl_ccw_loadparm_attr.attr,
 569         NULL,
 570 };
 571
 572 static struct attribute_group reipl_ccw_attr_group = {
 573         .name  = IPL_CCW_STR,
 574         .attrs = reipl_ccw_attrs,
 575 };
 576
 577
 578 /* NSS reipl device attributes */
 579
 580 DEFINE_IPL_ATTR_STR_RW(reipl_nss, name, "%s\n", "%s\n", reipl_nss_name);
 581
 582 static struct attribute *reipl_nss_attrs[] = {
 583         &sys_reipl_nss_name_attr.attr,
 584         NULL,
 585 };
 586
 587 static struct attribute_group reipl_nss_attr_group = {
 588         .name  = IPL_NSS_STR,
 589         .attrs = reipl_nss_attrs,
 590 };
 591
 592 /* reipl type */
 593
 594 static int reipl_set_type(enum ipl_type type)
 595 {
 596         if (!(reipl_capabilities & type))
 597                 return -EINVAL;
 598
 599         switch(type) {
 600         case IPL_TYPE_CCW:
 601                 if (diag308_set_works)
 602                         reipl_method = REIPL_METHOD_CCW_DIAG;
 603                 else if (MACHINE_IS_VM)
 604                         reipl_method = REIPL_METHOD_CCW_VM;
 605                 else
 606                         reipl_method = REIPL_METHOD_CCW_CIO;
 607                 break;
 608         case IPL_TYPE_FCP:
 609                 if (diag308_set_works)
 610                         reipl_method = REIPL_METHOD_FCP_RW_DIAG;
 611                 else if (MACHINE_IS_VM)
 612                         reipl_method = REIPL_METHOD_FCP_RO_VM;
 613                 else
 614                         reipl_method = REIPL_METHOD_FCP_RO_DIAG;
 615                 break;
 616         case IPL_TYPE_FCP_DUMP:
 617                 reipl_method = REIPL_METHOD_FCP_DUMP;
 618                 break;
 619         case IPL_TYPE_NSS:
 620                 reipl_method = REIPL_METHOD_NSS;
 621                 break;
 622         case IPL_TYPE_UNKNOWN:
 623                 reipl_method = REIPL_METHOD_DEFAULT;
 624                 break;
 625         default:
 626                 BUG();
 627         }
 628         reipl_type = type;
 629         return 0;
 630 }
 631
 632 static ssize_t reipl_type_show(struct kobject *kobj,
 633                                struct kobj_attribute *attr, char *page)
 634 {
 635         return sprintf(page, "%s\n", ipl_type_str(reipl_type));
 636 }
 637
 638 static ssize_t reipl_type_store(struct kobject *kobj,
 639                                 struct kobj_attribute *attr,
 640                                 const char *buf, size_t len)
 641 {
 642         int rc = -EINVAL;
 643
 644         if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
 645                 rc = reipl_set_type(IPL_TYPE_CCW);
 646         else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
 647                 rc = reipl_set_type(IPL_TYPE_FCP);
 648         else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
 649                 rc = reipl_set_type(IPL_TYPE_NSS);
 650         return (rc != 0) ? rc : len;
 651 }
 652
 653 static struct kobj_attribute reipl_type_attr =
 654         __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
 655
 656 static struct kset *reipl_kset;
 657
 658 static void reipl_run(struct shutdown_trigger *trigger)
 659 {
 660         struct ccw_dev_id devid;
 661         static char buf[100];
 662         char loadparm[LOADPARM_LEN + 1];
 663
 664         switch (reipl_method) {
 665         case REIPL_METHOD_CCW_CIO:
 666                 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
 667                 devid.ssid  = 0;
 668                 reipl_ccw_dev(&devid);
 669                 break;
 670         case REIPL_METHOD_CCW_VM:
 671                 reipl_get_ascii_loadparm(loadparm);
 672                 if (strlen(loadparm) == 0)
 673                         sprintf(buf, "IPL %X CLEAR",
 674                                 reipl_block_ccw->ipl_info.ccw.devno);
 675                 else
 676                         sprintf(buf, "IPL %X CLEAR LOADPARM '%s'",
 677                                 reipl_block_ccw->ipl_info.ccw.devno, loadparm);
 678                 __cpcmd(buf, NULL, 0, NULL);
 679                 break;
 680         case REIPL_METHOD_CCW_DIAG:
 681                 diag308(DIAG308_SET, reipl_block_ccw);
 682                 diag308(DIAG308_IPL, NULL);
 683                 break;
 684         case REIPL_METHOD_FCP_RW_DIAG:
 685                 diag308(DIAG308_SET, reipl_block_fcp);
 686                 diag308(DIAG308_IPL, NULL);
 687                 break;
 688         case REIPL_METHOD_FCP_RO_DIAG:
 689                 diag308(DIAG308_IPL, NULL);
 690                 break;
 691         case REIPL_METHOD_FCP_RO_VM:
 692                 __cpcmd("IPL", NULL, 0, NULL);
 693                 break;
 694         case REIPL_METHOD_NSS:
 695                 sprintf(buf, "IPL %s", reipl_nss_name);
 696                 __cpcmd(buf, NULL, 0, NULL);
 697                 break;
 698         case REIPL_METHOD_DEFAULT:
 699                 if (MACHINE_IS_VM)
 700                         __cpcmd("IPL", NULL, 0, NULL);
 701                 diag308(DIAG308_IPL, NULL);
 702                 break;
 703         case REIPL_METHOD_FCP_DUMP:
 704         default:
 705                 break;
 706         }
 707         disabled_wait((unsigned long) __builtin_return_address(0));
 708 }
 709
 710 static void __init reipl_probe(void)
 711 {
 712         void *buffer;
 713
 714         buffer = (void *) get_zeroed_page(GFP_KERNEL);
 715         if (!buffer)
 716                 return;
 717         if (diag308(DIAG308_STORE, buffer) == DIAG308_RC_OK)
 718                 diag308_set_works = 1;
 719         free_page((unsigned long)buffer);
 720 }
 721
 722 static int __init reipl_nss_init(void)
 723 {
 724         int rc;
 725
 726         if (!MACHINE_IS_VM)
 727                 return 0;
 728         rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
 729         if (rc)
 730                 return rc;
 731         strncpy(reipl_nss_name, kernel_nss_name, NSS_NAME_SIZE + 1);
 732         reipl_capabilities |= IPL_TYPE_NSS;
 733         return 0;
 734 }
 735
 736 static int __init reipl_ccw_init(void)
 737 {
 738         int rc;
 739
 740         reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
 741         if (!reipl_block_ccw)
 742                 return -ENOMEM;
 743         rc = sysfs_create_group(&reipl_kset->kobj, &reipl_ccw_attr_group);
 744         if (rc) {
 745                 free_page((unsigned long)reipl_block_ccw);
 746                 return rc;
 747         }
 748         reipl_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
 749         reipl_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
 750         reipl_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
 751         reipl_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
 752         reipl_block_ccw->hdr.flags = DIAG308_FLAGS_LP_VALID;
 753         /* check if read scp info worked and set loadparm */
 754         if (sclp_ipl_info.is_valid)
 755                 memcpy(reipl_block_ccw->ipl_info.ccw.load_param,
 756                        &sclp_ipl_info.loadparm, LOADPARM_LEN);
 757         else
 758                 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
 759                 memset(reipl_block_ccw->ipl_info.ccw.load_param, 0x40,
 760                        LOADPARM_LEN);
 761         if (!MACHINE_IS_VM && !diag308_set_works)
 762                 sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
 763         if (ipl_info.type == IPL_TYPE_CCW)
 764                 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
 765         reipl_capabilities |= IPL_TYPE_CCW;
 766         return 0;
 767 }
 768
 769 static int __init reipl_fcp_init(void)
 770 {
 771         int rc;
 772
 773         if ((!diag308_set_works) && (ipl_info.type != IPL_TYPE_FCP))
 774                 return 0;
 775         if ((!diag308_set_works) && (ipl_info.type == IPL_TYPE_FCP))
 776                 make_attrs_ro(reipl_fcp_attrs);
 777
 778         reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
 779         if (!reipl_block_fcp)
 780                 return -ENOMEM;
 781         rc = sysfs_create_group(&reipl_kset->kobj, &reipl_fcp_attr_group);
 782         if (rc) {
 783                 free_page((unsigned long)reipl_block_fcp);
 784                 return rc;
 785         }
 786         if (ipl_info.type == IPL_TYPE_FCP) {
 787                 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
 788         } else {
 789                 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
 790                 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
 791                 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
 792                 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
 793                 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
 794         }
 795         reipl_capabilities |= IPL_TYPE_FCP;
 796         return 0;
 797 }
 798
 799 static int __init reipl_init(void)
 800 {
 801         int rc;
 802
 803         reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
 804         if (!reipl_kset)
 805                 return -ENOMEM;
 806         rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
 807         if (rc) {
 808                 kset_unregister(reipl_kset);
 809                 return rc;
 810         }
 811         rc = reipl_ccw_init();
 812         if (rc)
 813                 return rc;
 814         rc = reipl_fcp_init();
 815         if (rc)
 816                 return rc;
 817         rc = reipl_nss_init();
 818         if (rc)
 819                 return rc;
 820         rc = reipl_set_type(ipl_info.type);
 821         if (rc)
 822                 return rc;
 823         return 0;
 824 }
 825
 826 static struct shutdown_action __refdata reipl_action = {
 827         .name   = SHUTDOWN_ACTION_REIPL_STR,
 828         .fn     = reipl_run,
 829         .init   = reipl_init,
 830 };
 831
 832 /*
 833  * dump shutdown action: Dump Linux on shutdown.
 834  */
 835
 836 /* FCP dump device attributes */
 837
 838 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n",
 839                    dump_block_fcp->ipl_info.fcp.wwpn);
 840 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n",
 841                    dump_block_fcp->ipl_info.fcp.lun);
 842 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
 843                    dump_block_fcp->ipl_info.fcp.bootprog);
 844 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
 845                    dump_block_fcp->ipl_info.fcp.br_lba);
 846 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
 847                    dump_block_fcp->ipl_info.fcp.devno);
 848
 849 static struct attribute *dump_fcp_attrs[] = {
 850         &sys_dump_fcp_device_attr.attr,
 851         &sys_dump_fcp_wwpn_attr.attr,
 852         &sys_dump_fcp_lun_attr.attr,
 853         &sys_dump_fcp_bootprog_attr.attr,
 854         &sys_dump_fcp_br_lba_attr.attr,
 855         NULL,
 856 };
 857
 858 static struct attribute_group dump_fcp_attr_group = {
 859         .name  = IPL_FCP_STR,
 860         .attrs = dump_fcp_attrs,
 861 };
 862
 863 /* CCW dump device attributes */
 864
 865 DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
 866                    dump_block_ccw->ipl_info.ccw.devno);
 867
 868 static struct attribute *dump_ccw_attrs[] = {
 869         &sys_dump_ccw_device_attr.attr,
 870         NULL,
 871 };
 872
 873 static struct attribute_group dump_ccw_attr_group = {
 874         .name  = IPL_CCW_STR,
 875         .attrs = dump_ccw_attrs,
 876 };
 877
 878 /* dump type */
 879
 880 static int dump_set_type(enum dump_type type)
 881 {
 882         if (!(dump_capabilities & type))
 883                 return -EINVAL;
 884         switch (type) {
 885         case DUMP_TYPE_CCW:
 886                 if (diag308_set_works)
 887                         dump_method = DUMP_METHOD_CCW_DIAG;
 888                 else if (MACHINE_IS_VM)
 889                         dump_method = DUMP_METHOD_CCW_VM;
 890                 else
 891                         dump_method = DUMP_METHOD_CCW_CIO;
 892                 break;
 893         case DUMP_TYPE_FCP:
 894                 dump_method = DUMP_METHOD_FCP_DIAG;
 895                 break;
 896         default:
 897                 dump_method = DUMP_METHOD_NONE;
 898         }
 899         dump_type = type;
 900         return 0;
 901 }
 902
 903 static ssize_t dump_type_show(struct kobject *kobj,
 904                               struct kobj_attribute *attr, char *page)
 905 {
 906         return sprintf(page, "%s\n", dump_type_str(dump_type));
 907 }
 908
 909 static ssize_t dump_type_store(struct kobject *kobj,
 910                                struct kobj_attribute *attr,
 911                                const char *buf, size_t len)
 912 {
 913         int rc = -EINVAL;
 914
 915         if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
 916                 rc = dump_set_type(DUMP_TYPE_NONE);
 917         else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
 918                 rc = dump_set_type(DUMP_TYPE_CCW);
 919         else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
 920                 rc = dump_set_type(DUMP_TYPE_FCP);
 921         return (rc != 0) ? rc : len;
 922 }
 923
 924 static struct kobj_attribute dump_type_attr =
 925         __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
 926
 927 static struct kset *dump_kset;
 928
 929 static void dump_run(struct shutdown_trigger *trigger)
 930 {
 931         struct ccw_dev_id devid;
 932         static char buf[100];
 933
 934         switch (dump_method) {
 935         case DUMP_METHOD_CCW_CIO:
 936                 smp_send_stop();
 937                 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
 938                 devid.ssid  = 0;
 939                 reipl_ccw_dev(&devid);
 940                 break;
 941         case DUMP_METHOD_CCW_VM:
 942                 smp_send_stop();
 943                 sprintf(buf, "STORE STATUS");
 944                 __cpcmd(buf, NULL, 0, NULL);
 945                 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
 946                 __cpcmd(buf, NULL, 0, NULL);
 947                 break;
 948         case DUMP_METHOD_CCW_DIAG:
 949                 diag308(DIAG308_SET, dump_block_ccw);
 950                 diag308(DIAG308_DUMP, NULL);
 951                 break;
 952         case DUMP_METHOD_FCP_DIAG:
 953                 diag308(DIAG308_SET, dump_block_fcp);
 954                 diag308(DIAG308_DUMP, NULL);
 955                 break;
 956         case DUMP_METHOD_NONE:
 957         default:
 958                 return;
 959         }
 960         printk(KERN_EMERG "Dump failed!\n");
 961 }
 962
 963 static int __init dump_ccw_init(void)
 964 {
 965         int rc;
 966
 967         dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
 968         if (!dump_block_ccw)
 969                 return -ENOMEM;
 970         rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
 971         if (rc) {
 972                 free_page((unsigned long)dump_block_ccw);
 973                 return rc;
 974         }
 975         dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
 976         dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
 977         dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
 978         dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
 979         dump_capabilities |= DUMP_TYPE_CCW;
 980         return 0;
 981 }
 982
 983 static int __init dump_fcp_init(void)
 984 {
 985         int rc;
 986
 987         if (!sclp_ipl_info.has_dump)
 988                 return 0; /* LDIPL DUMP is not installed */
 989         if (!diag308_set_works)
 990                 return 0;
 991         dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
 992         if (!dump_block_fcp)
 993                 return -ENOMEM;
 994         rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
 995         if (rc) {
 996                 free_page((unsigned long)dump_block_fcp);
 997                 return rc;
 998         }
 999         dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1000         dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1001         dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1002         dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1003         dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1004         dump_capabilities |= DUMP_TYPE_FCP;
1005         return 0;
1006 }
1007
1008 static int __init dump_init(void)
1009 {
1010         int rc;
1011
1012         dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1013         if (!dump_kset)
1014                 return -ENOMEM;
1015         rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1016         if (rc) {
1017                 kset_unregister(dump_kset);
1018                 return rc;
1019         }
1020         rc = dump_ccw_init();
1021         if (rc)
1022                 return rc;
1023         rc = dump_fcp_init();
1024         if (rc)
1025                 return rc;
1026         dump_set_type(DUMP_TYPE_NONE);
1027         return 0;
1028 }
1029
1030 static struct shutdown_action __refdata dump_action = {
1031         .name   = SHUTDOWN_ACTION_DUMP_STR,
1032         .fn     = dump_run,
1033         .init   = dump_init,
1034 };
1035
1036 /*
1037  * vmcmd shutdown action: Trigger vm command on shutdown.
1038  */
1039
1040 static char vmcmd_on_reboot[128];
1041 static char vmcmd_on_panic[128];
1042 static char vmcmd_on_halt[128];
1043 static char vmcmd_on_poff[128];
1044
1045 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1046 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1047 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1048 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1049
1050 static struct attribute *vmcmd_attrs[] = {
1051         &sys_vmcmd_on_reboot_attr.attr,
1052         &sys_vmcmd_on_panic_attr.attr,
1053         &sys_vmcmd_on_halt_attr.attr,
1054         &sys_vmcmd_on_poff_attr.attr,
1055         NULL,
1056 };
1057
1058 static struct attribute_group vmcmd_attr_group = {
1059         .attrs = vmcmd_attrs,
1060 };
1061
1062 static struct kset *vmcmd_kset;
1063
1064 static void vmcmd_run(struct shutdown_trigger *trigger)
1065 {
1066         char *cmd, *next_cmd;
1067
1068         if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1069                 cmd = vmcmd_on_reboot;
1070         else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1071                 cmd = vmcmd_on_panic;
1072         else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1073                 cmd = vmcmd_on_halt;
1074         else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1075                 cmd = vmcmd_on_poff;
1076         else
1077                 return;
1078
1079         if (strlen(cmd) == 0)
1080                 return;
1081         do {
1082                 next_cmd = strchr(cmd, '\n');
1083                 if (next_cmd) {
1084                         next_cmd[0] = 0;
1085                         next_cmd += 1;
1086                 }
1087                 __cpcmd(cmd, NULL, 0, NULL);
1088                 cmd = next_cmd;
1089         } while (cmd != NULL);
1090 }
1091
1092 static int vmcmd_init(void)
1093 {
1094         if (!MACHINE_IS_VM)
1095                 return -ENOTSUPP;
1096         vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1097         if (!vmcmd_kset)
1098                 return -ENOMEM;
1099         return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1100 }
1101
1102 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1103                                               vmcmd_run, vmcmd_init};
1104
1105 /*
1106  * stop shutdown action: Stop Linux on shutdown.
1107  */
1108
1109 static void stop_run(struct shutdown_trigger *trigger)
1110 {
1111         if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1112                 disabled_wait((unsigned long) __builtin_return_address(0));
1113         else {
1114                 signal_processor(smp_processor_id(), sigp_stop);
1115                 for (;;);
1116         }
1117 }
1118
1119 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1120                                              stop_run, NULL};
1121
1122 /* action list */
1123
1124 static struct shutdown_action *shutdown_actions_list[] = {
1125         &ipl_action, &reipl_action, &dump_action, &vmcmd_action, &stop_action};
1126 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1127
1128 /*
1129  * Trigger section
1130  */
1131
1132 static struct kset *shutdown_actions_kset;
1133
1134 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1135                        size_t len)
1136 {
1137         int i;
1138         for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1139                 if (!shutdown_actions_list[i])
1140                         continue;
1141                 if (strncmp(buf, shutdown_actions_list[i]->name,
1142                             strlen(shutdown_actions_list[i]->name)) == 0) {
1143                         trigger->action = shutdown_actions_list[i];
1144                         return len;
1145                 }
1146         }
1147         return -EINVAL;
1148 }
1149
1150 /* on reipl */
1151
1152 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1153                                                     &reipl_action};
1154
1155 static ssize_t on_reboot_show(struct kobject *kobj,
1156                               struct kobj_attribute *attr, char *page)
1157 {
1158         return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1159 }
1160
1161 static ssize_t on_reboot_store(struct kobject *kobj,
1162                                struct kobj_attribute *attr,
1163                                const char *buf, size_t len)
1164 {
1165         return set_trigger(buf, &on_reboot_trigger, len);
1166 }
1167
1168 static struct kobj_attribute on_reboot_attr =
1169         __ATTR(on_reboot, 0644, on_reboot_show, on_reboot_store);
1170
1171 static void do_machine_restart(char *__unused)
1172 {
1173         smp_send_stop();
1174         on_reboot_trigger.action->fn(&on_reboot_trigger);
1175         reipl_run(NULL);
1176 }
1177 void (*_machine_restart)(char *command) = do_machine_restart;
1178
1179 /* on panic */
1180
1181 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1182
1183 static ssize_t on_panic_show(struct kobject *kobj,
1184                              struct kobj_attribute *attr, char *page)
1185 {
1186         return sprintf(page, "%s\n", on_panic_trigger.action->name);
1187 }
1188
1189 static ssize_t on_panic_store(struct kobject *kobj,
1190                               struct kobj_attribute *attr,
1191                               const char *buf, size_t len)
1192 {
1193         return set_trigger(buf, &on_panic_trigger, len);
1194 }
1195
1196 static struct kobj_attribute on_panic_attr =
1197         __ATTR(on_panic, 0644, on_panic_show, on_panic_store);
1198
1199 static void do_panic(void)
1200 {
1201         on_panic_trigger.action->fn(&on_panic_trigger);
1202         stop_run(&on_panic_trigger);
1203 }
1204
1205 /* on halt */
1206
1207 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1208
1209 static ssize_t on_halt_show(struct kobject *kobj,
1210                             struct kobj_attribute *attr, char *page)
1211 {
1212         return sprintf(page, "%s\n", on_halt_trigger.action->name);
1213 }
1214
1215 static ssize_t on_halt_store(struct kobject *kobj,
1216                              struct kobj_attribute *attr,
1217                              const char *buf, size_t len)
1218 {
1219         return set_trigger(buf, &on_halt_trigger, len);
1220 }
1221
1222 static struct kobj_attribute on_halt_attr =
1223         __ATTR(on_halt, 0644, on_halt_show, on_halt_store);
1224
1225
1226 static void do_machine_halt(void)
1227 {
1228         smp_send_stop();
1229         on_halt_trigger.action->fn(&on_halt_trigger);
1230         stop_run(&on_halt_trigger);
1231 }
1232 void (*_machine_halt)(void) = do_machine_halt;
1233
1234 /* on power off */
1235
1236 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1237
1238 static ssize_t on_poff_show(struct kobject *kobj,
1239                             struct kobj_attribute *attr, char *page)
1240 {
1241         return sprintf(page, "%s\n", on_poff_trigger.action->name);
1242 }
1243
1244 static ssize_t on_poff_store(struct kobject *kobj,
1245                              struct kobj_attribute *attr,
1246                              const char *buf, size_t len)
1247 {
1248         return set_trigger(buf, &on_poff_trigger, len);
1249 }
1250
1251 static struct kobj_attribute on_poff_attr =
1252         __ATTR(on_poff, 0644, on_poff_show, on_poff_store);
1253
1254
1255 static void do_machine_power_off(void)
1256 {
1257         smp_send_stop();
1258         on_poff_trigger.action->fn(&on_poff_trigger);
1259         stop_run(&on_poff_trigger);
1260 }
1261 void (*_machine_power_off)(void) = do_machine_power_off;
1262
1263 static void __init shutdown_triggers_init(void)
1264 {
1265         shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1266                                                     firmware_kobj);
1267         if (!shutdown_actions_kset)
1268                 goto fail;
1269         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1270                               &on_reboot_attr.attr))
1271                 goto fail;
1272         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1273                               &on_panic_attr.attr))
1274                 goto fail;
1275         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1276                               &on_halt_attr.attr))
1277                 goto fail;
1278         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1279                               &on_poff_attr.attr))
1280                 goto fail;
1281
1282         return;
1283 fail:
1284         panic("shutdown_triggers_init failed\n");
1285 }
1286
1287 static void __init shutdown_actions_init(void)
1288 {
1289         int i;
1290
1291         for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1292                 if (!shutdown_actions_list[i]->init)
1293                         continue;
1294                 if (shutdown_actions_list[i]->init())
1295                         shutdown_actions_list[i] = NULL;
1296         }
1297 }
1298
1299 static int __init s390_ipl_init(void)
1300 {
1301         reipl_probe();
1302         sclp_get_ipl_info(&sclp_ipl_info);
1303         shutdown_actions_init();
1304         shutdown_triggers_init();
1305         return 0;
1306 }
1307
1308 __initcall(s390_ipl_init);
1309
1310 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1311 {
1312         int sx, dx;
1313
1314         dx = 0;
1315         for (sx = 0; src[sx] != 0; sx++) {
1316                 if (src[sx] == '"')
1317                         continue;
1318                 dst[dx++] = src[sx];
1319                 if (dx >= n)
1320                         break;
1321         }
1322 }
1323
1324 static int __init vmcmd_on_reboot_setup(char *str)
1325 {
1326         if (!MACHINE_IS_VM)
1327                 return 1;
1328         strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1329         vmcmd_on_reboot[127] = 0;
1330         on_reboot_trigger.action = &vmcmd_action;
1331         return 1;
1332 }
1333 __setup("vmreboot=", vmcmd_on_reboot_setup);
1334
1335 static int __init vmcmd_on_panic_setup(char *str)
1336 {
1337         if (!MACHINE_IS_VM)
1338                 return 1;
1339         strncpy_skip_quote(vmcmd_on_panic, str, 127);
1340         vmcmd_on_panic[127] = 0;
1341         on_panic_trigger.action = &vmcmd_action;
1342         return 1;
1343 }
1344 __setup("vmpanic=", vmcmd_on_panic_setup);
1345
1346 static int __init vmcmd_on_halt_setup(char *str)
1347 {
1348         if (!MACHINE_IS_VM)
1349                 return 1;
1350         strncpy_skip_quote(vmcmd_on_halt, str, 127);
1351         vmcmd_on_halt[127] = 0;
1352         on_halt_trigger.action = &vmcmd_action;
1353         return 1;
1354 }
1355 __setup("vmhalt=", vmcmd_on_halt_setup);
1356
1357 static int __init vmcmd_on_poff_setup(char *str)
1358 {
1359         if (!MACHINE_IS_VM)
1360                 return 1;
1361         strncpy_skip_quote(vmcmd_on_poff, str, 127);
1362         vmcmd_on_poff[127] = 0;
1363         on_poff_trigger.action = &vmcmd_action;
1364         return 1;
1365 }
1366 __setup("vmpoff=", vmcmd_on_poff_setup);
1367
1368 static int on_panic_notify(struct notifier_block *self,
1369                            unsigned long event, void *data)
1370 {
1371         do_panic();
1372         return NOTIFY_OK;
1373 }
1374
1375 static struct notifier_block on_panic_nb = {
1376         .notifier_call = on_panic_notify,
1377         .priority = 0,
1378 };
1379
1380 void __init setup_ipl(void)
1381 {
1382         ipl_info.type = get_ipl_type();
1383         switch (ipl_info.type) {
1384         case IPL_TYPE_CCW:
1385                 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1386                 ipl_info.data.ccw.dev_id.ssid = 0;
1387                 break;
1388         case IPL_TYPE_FCP:
1389         case IPL_TYPE_FCP_DUMP:
1390                 ipl_info.data.fcp.dev_id.devno =
1391                         IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1392                 ipl_info.data.fcp.dev_id.ssid = 0;
1393                 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1394                 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1395                 break;
1396         case IPL_TYPE_NSS:
1397                 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1398                         sizeof(ipl_info.data.nss.name));
1399                 break;
1400         case IPL_TYPE_UNKNOWN:
1401         default:
1402                 /* We have no info to copy */
1403                 break;
1404         }
1405         atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1406 }
1407
1408 void __init ipl_save_parameters(void)
1409 {
1410         struct cio_iplinfo iplinfo;
1411         unsigned int *ipl_ptr;
1412         void *src, *dst;
1413
1414         if (cio_get_iplinfo(&iplinfo))
1415                 return;
1416
1417         ipl_devno = iplinfo.devno;
1418         ipl_flags |= IPL_DEVNO_VALID;
1419         if (!iplinfo.is_qdio)
1420                 return;
1421         ipl_flags |= IPL_PARMBLOCK_VALID;
1422         ipl_ptr = (unsigned int *)__LC_IPL_PARMBLOCK_PTR;
1423         src = (void *)(unsigned long)*ipl_ptr;
1424         dst = (void *)IPL_PARMBLOCK_ORIGIN;
1425         memmove(dst, src, PAGE_SIZE);
1426         *ipl_ptr = IPL_PARMBLOCK_ORIGIN;
1427 }
1428
1429 static LIST_HEAD(rcall);
1430 static DEFINE_MUTEX(rcall_mutex);
1431
1432 void register_reset_call(struct reset_call *reset)
1433 {
1434         mutex_lock(&rcall_mutex);
1435         list_add(&reset->list, &rcall);
1436         mutex_unlock(&rcall_mutex);
1437 }
1438 EXPORT_SYMBOL_GPL(register_reset_call);
1439
1440 void unregister_reset_call(struct reset_call *reset)
1441 {
1442         mutex_lock(&rcall_mutex);
1443         list_del(&reset->list);
1444         mutex_unlock(&rcall_mutex);
1445 }
1446 EXPORT_SYMBOL_GPL(unregister_reset_call);
1447
1448 static void do_reset_calls(void)
1449 {
1450         struct reset_call *reset;
1451
1452         list_for_each_entry(reset, &rcall, list)
1453                 reset->fn();
1454 }
1455
1456 u32 dump_prefix_page;
1457
1458 void s390_reset_system(void)
1459 {
1460         struct _lowcore *lc;
1461
1462         lc = (struct _lowcore *)(unsigned long) store_prefix();
1463
1464         /* Stack for interrupt/machine check handler */
1465         lc->panic_stack = S390_lowcore.panic_stack;
1466
1467         /* Save prefix page address for dump case */
1468         dump_prefix_page = (u32)(unsigned long) lc;
1469
1470         /* Disable prefixing */
1471         set_prefix(0);
1472
1473         /* Disable lowcore protection */
1474         __ctl_clear_bit(0,28);
1475
1476         /* Set new machine check handler */
1477         S390_lowcore.mcck_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
1478         S390_lowcore.mcck_new_psw.addr =
1479                 PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;
1480
1481         /* Set new program check handler */
1482         S390_lowcore.program_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
1483         S390_lowcore.program_new_psw.addr =
1484                 PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
1485
1486         do_reset_calls();
1487 }
1488