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 <linux/fs.h>
  18 #include <linux/gfp.h>
  19 #include <asm/ipl.h>
  20 #include <asm/smp.h>
  21 #include <asm/setup.h>
  22 #include <asm/cpcmd.h>
  23 #include <asm/cio.h>
  24 #include <asm/ebcdic.h>
  25 #include <asm/reset.h>
  26 #include <asm/sclp.h>
  27 #include <asm/sigp.h>
  28 #include <asm/checksum.h>
  29
  30 #define IPL_PARM_BLOCK_VERSION 0
  31
  32 #define IPL_UNKNOWN_STR         "unknown"
  33 #define IPL_CCW_STR             "ccw"
  34 #define IPL_FCP_STR             "fcp"
  35 #define IPL_FCP_DUMP_STR        "fcp_dump"
  36 #define IPL_NSS_STR             "nss"
  37
  38 #define DUMP_CCW_STR            "ccw"
  39 #define DUMP_FCP_STR            "fcp"
  40 #define DUMP_NONE_STR           "none"
  41
  42 /*
  43  * Four shutdown trigger types are supported:
  44  * - panic
  45  * - halt
  46  * - power off
  47  * - reipl
  48  */
  49 #define ON_PANIC_STR            "on_panic"
  50 #define ON_HALT_STR             "on_halt"
  51 #define ON_POFF_STR             "on_poff"
  52 #define ON_REIPL_STR            "on_reboot"
  53
  54 struct shutdown_action;
  55 struct shutdown_trigger {
  56         char *name;
  57         struct shutdown_action *action;
  58 };
  59
  60 /*
  61  * The following shutdown action types are supported:
  62  */
  63 #define SHUTDOWN_ACTION_IPL_STR         "ipl"
  64 #define SHUTDOWN_ACTION_REIPL_STR       "reipl"
  65 #define SHUTDOWN_ACTION_DUMP_STR        "dump"
  66 #define SHUTDOWN_ACTION_VMCMD_STR       "vmcmd"
  67 #define SHUTDOWN_ACTION_STOP_STR        "stop"
  68 #define SHUTDOWN_ACTION_DUMP_REIPL_STR  "dump_reipl"
  69
  70 struct shutdown_action {
  71         char *name;
  72         void (*fn) (struct shutdown_trigger *trigger);
  73         int (*init) (void);
  74         int init_rc;
  75 };
  76
  77 static char *ipl_type_str(enum ipl_type type)
  78 {
  79         switch (type) {
  80         case IPL_TYPE_CCW:
  81                 return IPL_CCW_STR;
  82         case IPL_TYPE_FCP:
  83                 return IPL_FCP_STR;
  84         case IPL_TYPE_FCP_DUMP:
  85                 return IPL_FCP_DUMP_STR;
  86         case IPL_TYPE_NSS:
  87                 return IPL_NSS_STR;
  88         case IPL_TYPE_UNKNOWN:
  89         default:
  90                 return IPL_UNKNOWN_STR;
  91         }
  92 }
  93
  94 enum dump_type {
  95         DUMP_TYPE_NONE  = 1,
  96         DUMP_TYPE_CCW   = 2,
  97         DUMP_TYPE_FCP   = 4,
  98 };
  99
 100 static char *dump_type_str(enum dump_type type)
 101 {
 102         switch (type) {
 103         case DUMP_TYPE_NONE:
 104                 return DUMP_NONE_STR;
 105         case DUMP_TYPE_CCW:
 106                 return DUMP_CCW_STR;
 107         case DUMP_TYPE_FCP:
 108                 return DUMP_FCP_STR;
 109         default:
 110                 return NULL;
 111         }
 112 }
 113
 114 /*
 115  * Must be in data section since the bss section
 116  * is not cleared when these are accessed.
 117  */
 118 static u16 ipl_devno __attribute__((__section__(".data"))) = 0;
 119 u32 ipl_flags __attribute__((__section__(".data"))) = 0;
 120
 121 enum ipl_method {
 122         REIPL_METHOD_CCW_CIO,
 123         REIPL_METHOD_CCW_DIAG,
 124         REIPL_METHOD_CCW_VM,
 125         REIPL_METHOD_FCP_RO_DIAG,
 126         REIPL_METHOD_FCP_RW_DIAG,
 127         REIPL_METHOD_FCP_RO_VM,
 128         REIPL_METHOD_FCP_DUMP,
 129         REIPL_METHOD_NSS,
 130         REIPL_METHOD_NSS_DIAG,
 131         REIPL_METHOD_DEFAULT,
 132 };
 133
 134 enum dump_method {
 135         DUMP_METHOD_NONE,
 136         DUMP_METHOD_CCW_CIO,
 137         DUMP_METHOD_CCW_DIAG,
 138         DUMP_METHOD_CCW_VM,
 139         DUMP_METHOD_FCP_DIAG,
 140 };
 141
 142 static int diag308_set_works = 0;
 143
 144 static struct ipl_parameter_block ipl_block;
 145
 146 static int reipl_capabilities = IPL_TYPE_UNKNOWN;
 147
 148 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
 149 static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
 150 static struct ipl_parameter_block *reipl_block_fcp;
 151 static struct ipl_parameter_block *reipl_block_ccw;
 152 static struct ipl_parameter_block *reipl_block_nss;
 153 static struct ipl_parameter_block *reipl_block_actual;
 154
 155 static int dump_capabilities = DUMP_TYPE_NONE;
 156 static enum dump_type dump_type = DUMP_TYPE_NONE;
 157 static enum dump_method dump_method = DUMP_METHOD_NONE;
 158 static struct ipl_parameter_block *dump_block_fcp;
 159 static struct ipl_parameter_block *dump_block_ccw;
 160
 161 static struct sclp_ipl_info sclp_ipl_info;
 162
 163 int diag308(unsigned long subcode, void *addr)
 164 {
 165         register unsigned long _addr asm("0") = (unsigned long) addr;
 166         register unsigned long _rc asm("1") = 0;
 167
 168         asm volatile(
 169                 "       diag    %0,%2,0x308\n"
 170                 "0:\n"
 171                 EX_TABLE(0b,0b)
 172                 : "+d" (_addr), "+d" (_rc)
 173                 : "d" (subcode) : "cc", "memory");
 174         return _rc;
 175 }
 176 EXPORT_SYMBOL_GPL(diag308);
 177
 178 /* SYSFS */
 179
 180 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value)             \
 181 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,     \
 182                 struct kobj_attribute *attr,                            \
 183                 char *page)                                             \
 184 {                                                                       \
 185         return sprintf(page, _format, _value);                          \
 186 }                                                                       \
 187 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 188         __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL);
 189
 190 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)   \
 191 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,     \
 192                 struct kobj_attribute *attr,                            \
 193                 char *page)                                             \
 194 {                                                                       \
 195         return sprintf(page, _fmt_out,                                  \
 196                         (unsigned long long) _value);                   \
 197 }                                                                       \
 198 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,    \
 199                 struct kobj_attribute *attr,                            \
 200                 const char *buf, size_t len)                            \
 201 {                                                                       \
 202         unsigned long long value;                                       \
 203         if (sscanf(buf, _fmt_in, &value) != 1)                          \
 204                 return -EINVAL;                                         \
 205         _value = value;                                                 \
 206         return len;                                                     \
 207 }                                                                       \
 208 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 209         __ATTR(_name,(S_IRUGO | S_IWUSR),                               \
 210                         sys_##_prefix##_##_name##_show,                 \
 211                         sys_##_prefix##_##_name##_store);
 212
 213 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
 214 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,     \
 215                 struct kobj_attribute *attr,                            \
 216                 char *page)                                             \
 217 {                                                                       \
 218         return sprintf(page, _fmt_out, _value);                         \
 219 }                                                                       \
 220 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,    \
 221                 struct kobj_attribute *attr,                            \
 222                 const char *buf, size_t len)                            \
 223 {                                                                       \
 224         strncpy(_value, buf, sizeof(_value) - 1);                       \
 225         strim(_value);                                                  \
 226         return len;                                                     \
 227 }                                                                       \
 228 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 229         __ATTR(_name,(S_IRUGO | S_IWUSR),                               \
 230                         sys_##_prefix##_##_name##_show,                 \
 231                         sys_##_prefix##_##_name##_store);
 232
 233 static void make_attrs_ro(struct attribute **attrs)
 234 {
 235         while (*attrs) {
 236                 (*attrs)->mode = S_IRUGO;
 237                 attrs++;
 238         }
 239 }
 240
 241 /*
 242  * ipl section
 243  */
 244
 245 static __init enum ipl_type get_ipl_type(void)
 246 {
 247         struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
 248
 249         if (ipl_flags & IPL_NSS_VALID)
 250                 return IPL_TYPE_NSS;
 251         if (!(ipl_flags & IPL_DEVNO_VALID))
 252                 return IPL_TYPE_UNKNOWN;
 253         if (!(ipl_flags & IPL_PARMBLOCK_VALID))
 254                 return IPL_TYPE_CCW;
 255         if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
 256                 return IPL_TYPE_UNKNOWN;
 257         if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
 258                 return IPL_TYPE_UNKNOWN;
 259         if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
 260                 return IPL_TYPE_FCP_DUMP;
 261         return IPL_TYPE_FCP;
 262 }
 263
 264 struct ipl_info ipl_info;
 265 EXPORT_SYMBOL_GPL(ipl_info);
 266
 267 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
 268                              char *page)
 269 {
 270         return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
 271 }
 272
 273 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
 274
 275 /* VM IPL PARM routines */
 276 size_t reipl_get_ascii_vmparm(char *dest, size_t size,
 277                                    const struct ipl_parameter_block *ipb)
 278 {
 279         int i;
 280         size_t len;
 281         char has_lowercase = 0;
 282
 283         len = 0;
 284         if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
 285             (ipb->ipl_info.ccw.vm_parm_len > 0)) {
 286
 287                 len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
 288                 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
 289                 /* If at least one character is lowercase, we assume mixed
 290                  * case; otherwise we convert everything to lowercase.
 291                  */
 292                 for (i = 0; i < len; i++)
 293                         if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
 294                             (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
 295                             (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
 296                                 has_lowercase = 1;
 297                                 break;
 298                         }
 299                 if (!has_lowercase)
 300                         EBC_TOLOWER(dest, len);
 301                 EBCASC(dest, len);
 302         }
 303         dest[len] = 0;
 304
 305         return len;
 306 }
 307
 308 size_t append_ipl_vmparm(char *dest, size_t size)
 309 {
 310         size_t rc;
 311
 312         rc = 0;
 313         if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
 314                 rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
 315         else
 316                 dest[0] = 0;
 317         return rc;
 318 }
 319
 320 static ssize_t ipl_vm_parm_show(struct kobject *kobj,
 321                                 struct kobj_attribute *attr, char *page)
 322 {
 323         char parm[DIAG308_VMPARM_SIZE + 1] = {};
 324
 325         append_ipl_vmparm(parm, sizeof(parm));
 326         return sprintf(page, "%s\n", parm);
 327 }
 328
 329 static size_t scpdata_length(const char* buf, size_t count)
 330 {
 331         while (count) {
 332                 if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
 333                         break;
 334                 count--;
 335         }
 336         return count;
 337 }
 338
 339 size_t reipl_append_ascii_scpdata(char *dest, size_t size,
 340                                   const struct ipl_parameter_block *ipb)
 341 {
 342         size_t count;
 343         size_t i;
 344         int has_lowercase;
 345
 346         count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data,
 347                                              ipb->ipl_info.fcp.scp_data_len));
 348         if (!count)
 349                 goto out;
 350
 351         has_lowercase = 0;
 352         for (i = 0; i < count; i++) {
 353                 if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
 354                         count = 0;
 355                         goto out;
 356                 }
 357                 if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
 358                         has_lowercase = 1;
 359         }
 360
 361         if (has_lowercase)
 362                 memcpy(dest, ipb->ipl_info.fcp.scp_data, count);
 363         else
 364                 for (i = 0; i < count; i++)
 365                         dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]);
 366 out:
 367         dest[count] = '\0';
 368         return count;
 369 }
 370
 371 size_t append_ipl_scpdata(char *dest, size_t len)
 372 {
 373         size_t rc;
 374
 375         rc = 0;
 376         if (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP)
 377                 rc = reipl_append_ascii_scpdata(dest, len, &ipl_block);
 378         else
 379                 dest[0] = 0;
 380         return rc;
 381 }
 382
 383
 384 static struct kobj_attribute sys_ipl_vm_parm_attr =
 385         __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
 386
 387 static ssize_t sys_ipl_device_show(struct kobject *kobj,
 388                                    struct kobj_attribute *attr, char *page)
 389 {
 390         struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
 391
 392         switch (ipl_info.type) {
 393         case IPL_TYPE_CCW:
 394                 return sprintf(page, "0.0.%04x\n", ipl_devno);
 395         case IPL_TYPE_FCP:
 396         case IPL_TYPE_FCP_DUMP:
 397                 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
 398         default:
 399                 return 0;
 400         }
 401 }
 402
 403 static struct kobj_attribute sys_ipl_device_attr =
 404         __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
 405
 406 static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
 407                                   struct bin_attribute *attr, char *buf,
 408                                   loff_t off, size_t count)
 409 {
 410         return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START,
 411                                         IPL_PARMBLOCK_SIZE);
 412 }
 413
 414 static struct bin_attribute ipl_parameter_attr = {
 415         .attr = {
 416                 .name = "binary_parameter",
 417                 .mode = S_IRUGO,
 418         },
 419         .size = PAGE_SIZE,
 420         .read = &ipl_parameter_read,
 421 };
 422
 423 static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
 424                                  struct bin_attribute *attr, char *buf,
 425                                  loff_t off, size_t count)
 426 {
 427         unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
 428         void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
 429
 430         return memory_read_from_buffer(buf, count, &off, scp_data, size);
 431 }
 432
 433 static struct bin_attribute ipl_scp_data_attr = {
 434         .attr = {
 435                 .name = "scp_data",
 436                 .mode = S_IRUGO,
 437         },
 438         .size = PAGE_SIZE,
 439         .read = ipl_scp_data_read,
 440 };
 441
 442 /* FCP ipl device attributes */
 443
 444 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
 445                    IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
 446 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
 447                    IPL_PARMBLOCK_START->ipl_info.fcp.lun);
 448 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
 449                    IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
 450 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
 451                    IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
 452
 453 static struct attribute *ipl_fcp_attrs[] = {
 454         &sys_ipl_type_attr.attr,
 455         &sys_ipl_device_attr.attr,
 456         &sys_ipl_fcp_wwpn_attr.attr,
 457         &sys_ipl_fcp_lun_attr.attr,
 458         &sys_ipl_fcp_bootprog_attr.attr,
 459         &sys_ipl_fcp_br_lba_attr.attr,
 460         NULL,
 461 };
 462
 463 static struct attribute_group ipl_fcp_attr_group = {
 464         .attrs = ipl_fcp_attrs,
 465 };
 466
 467 /* CCW ipl device attributes */
 468
 469 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
 470                                      struct kobj_attribute *attr, char *page)
 471 {
 472         char loadparm[LOADPARM_LEN + 1] = {};
 473
 474         if (!sclp_ipl_info.is_valid)
 475                 return sprintf(page, "#unknown#\n");
 476         memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
 477         EBCASC(loadparm, LOADPARM_LEN);
 478         strim(loadparm);
 479         return sprintf(page, "%s\n", loadparm);
 480 }
 481
 482 static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
 483         __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
 484
 485 static struct attribute *ipl_ccw_attrs_vm[] = {
 486         &sys_ipl_type_attr.attr,
 487         &sys_ipl_device_attr.attr,
 488         &sys_ipl_ccw_loadparm_attr.attr,
 489         &sys_ipl_vm_parm_attr.attr,
 490         NULL,
 491 };
 492
 493 static struct attribute *ipl_ccw_attrs_lpar[] = {
 494         &sys_ipl_type_attr.attr,
 495         &sys_ipl_device_attr.attr,
 496         &sys_ipl_ccw_loadparm_attr.attr,
 497         NULL,
 498 };
 499
 500 static struct attribute_group ipl_ccw_attr_group_vm = {
 501         .attrs = ipl_ccw_attrs_vm,
 502 };
 503
 504 static struct attribute_group ipl_ccw_attr_group_lpar = {
 505         .attrs = ipl_ccw_attrs_lpar
 506 };
 507
 508 /* NSS ipl device attributes */
 509
 510 DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
 511
 512 static struct attribute *ipl_nss_attrs[] = {
 513         &sys_ipl_type_attr.attr,
 514         &sys_ipl_nss_name_attr.attr,
 515         &sys_ipl_ccw_loadparm_attr.attr,
 516         &sys_ipl_vm_parm_attr.attr,
 517         NULL,
 518 };
 519
 520 static struct attribute_group ipl_nss_attr_group = {
 521         .attrs = ipl_nss_attrs,
 522 };
 523
 524 /* UNKNOWN ipl device attributes */
 525
 526 static struct attribute *ipl_unknown_attrs[] = {
 527         &sys_ipl_type_attr.attr,
 528         NULL,
 529 };
 530
 531 static struct attribute_group ipl_unknown_attr_group = {
 532         .attrs = ipl_unknown_attrs,
 533 };
 534
 535 static struct kset *ipl_kset;
 536
 537 static int __init ipl_register_fcp_files(void)
 538 {
 539         int rc;
 540
 541         rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
 542         if (rc)
 543                 goto out;
 544         rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
 545         if (rc)
 546                 goto out_ipl_parm;
 547         rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_scp_data_attr);
 548         if (!rc)
 549                 goto out;
 550
 551         sysfs_remove_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
 552
 553 out_ipl_parm:
 554         sysfs_remove_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
 555 out:
 556         return rc;
 557 }
 558
 559 static void __ipl_run(void *unused)
 560 {
 561         diag308(DIAG308_IPL, NULL);
 562         if (MACHINE_IS_VM)
 563                 __cpcmd("IPL", NULL, 0, NULL);
 564         else if (ipl_info.type == IPL_TYPE_CCW)
 565                 reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
 566 }
 567
 568 static void ipl_run(struct shutdown_trigger *trigger)
 569 {
 570         smp_switch_to_ipl_cpu(__ipl_run, NULL);
 571 }
 572
 573 static int __init ipl_init(void)
 574 {
 575         int rc;
 576
 577         ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
 578         if (!ipl_kset) {
 579                 rc = -ENOMEM;
 580                 goto out;
 581         }
 582         switch (ipl_info.type) {
 583         case IPL_TYPE_CCW:
 584                 if (MACHINE_IS_VM)
 585                         rc = sysfs_create_group(&ipl_kset->kobj,
 586                                                 &ipl_ccw_attr_group_vm);
 587                 else
 588                         rc = sysfs_create_group(&ipl_kset->kobj,
 589                                                 &ipl_ccw_attr_group_lpar);
 590                 break;
 591         case IPL_TYPE_FCP:
 592         case IPL_TYPE_FCP_DUMP:
 593                 rc = ipl_register_fcp_files();
 594                 break;
 595         case IPL_TYPE_NSS:
 596                 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group);
 597                 break;
 598         default:
 599                 rc = sysfs_create_group(&ipl_kset->kobj,
 600                                         &ipl_unknown_attr_group);
 601                 break;
 602         }
 603 out:
 604         if (rc)
 605                 panic("ipl_init failed: rc = %i\n", rc);
 606
 607         return 0;
 608 }
 609
 610 static struct shutdown_action __refdata ipl_action = {
 611         .name   = SHUTDOWN_ACTION_IPL_STR,
 612         .fn     = ipl_run,
 613         .init   = ipl_init,
 614 };
 615
 616 /*
 617  * reipl shutdown action: Reboot Linux on shutdown.
 618  */
 619
 620 /* VM IPL PARM attributes */
 621 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
 622                                           char *page)
 623 {
 624         char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
 625
 626         reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
 627         return sprintf(page, "%s\n", vmparm);
 628 }
 629
 630 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
 631                                           size_t vmparm_max,
 632                                           const char *buf, size_t len)
 633 {
 634         int i, ip_len;
 635
 636         /* ignore trailing newline */
 637         ip_len = len;
 638         if ((len > 0) && (buf[len - 1] == '\n'))
 639                 ip_len--;
 640
 641         if (ip_len > vmparm_max)
 642                 return -EINVAL;
 643
 644         /* parm is used to store kernel options, check for common chars */
 645         for (i = 0; i < ip_len; i++)
 646                 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
 647                         return -EINVAL;
 648
 649         memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
 650         ipb->ipl_info.ccw.vm_parm_len = ip_len;
 651         if (ip_len > 0) {
 652                 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
 653                 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
 654                 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
 655         } else {
 656                 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
 657         }
 658
 659         return len;
 660 }
 661
 662 /* NSS wrapper */
 663 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
 664                                      struct kobj_attribute *attr, char *page)
 665 {
 666         return reipl_generic_vmparm_show(reipl_block_nss, page);
 667 }
 668
 669 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
 670                                       struct kobj_attribute *attr,
 671                                       const char *buf, size_t len)
 672 {
 673         return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
 674 }
 675
 676 /* CCW wrapper */
 677 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
 678                                      struct kobj_attribute *attr, char *page)
 679 {
 680         return reipl_generic_vmparm_show(reipl_block_ccw, page);
 681 }
 682
 683 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
 684                                       struct kobj_attribute *attr,
 685                                       const char *buf, size_t len)
 686 {
 687         return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
 688 }
 689
 690 static struct kobj_attribute sys_reipl_nss_vmparm_attr =
 691         __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
 692                                         reipl_nss_vmparm_store);
 693 static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
 694         __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
 695                                         reipl_ccw_vmparm_store);
 696
 697 /* FCP reipl device attributes */
 698
 699 static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
 700                                       struct bin_attribute *attr,
 701                                       char *buf, loff_t off, size_t count)
 702 {
 703         size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
 704         void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
 705
 706         return memory_read_from_buffer(buf, count, &off, scp_data, size);
 707 }
 708
 709 static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
 710                                        struct bin_attribute *attr,
 711                                        char *buf, loff_t off, size_t count)
 712 {
 713         size_t padding;
 714         size_t scpdata_len;
 715
 716         if (off < 0)
 717                 return -EINVAL;
 718
 719         if (off >= DIAG308_SCPDATA_SIZE)
 720                 return -ENOSPC;
 721
 722         if (count > DIAG308_SCPDATA_SIZE - off)
 723                 count = DIAG308_SCPDATA_SIZE - off;
 724
 725         memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf + off, count);
 726         scpdata_len = off + count;
 727
 728         if (scpdata_len % 8) {
 729                 padding = 8 - (scpdata_len % 8);
 730                 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
 731                        0, padding);
 732                 scpdata_len += padding;
 733         }
 734
 735         reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
 736         reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
 737         reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
 738
 739         return count;
 740 }
 741
 742 static struct bin_attribute sys_reipl_fcp_scp_data_attr = {
 743         .attr = {
 744                 .name = "scp_data",
 745                 .mode = S_IRUGO | S_IWUSR,
 746         },
 747         .size = PAGE_SIZE,
 748         .read = reipl_fcp_scpdata_read,
 749         .write = reipl_fcp_scpdata_write,
 750 };
 751
 752 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n",
 753                    reipl_block_fcp->ipl_info.fcp.wwpn);
 754 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n",
 755                    reipl_block_fcp->ipl_info.fcp.lun);
 756 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
 757                    reipl_block_fcp->ipl_info.fcp.bootprog);
 758 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
 759                    reipl_block_fcp->ipl_info.fcp.br_lba);
 760 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
 761                    reipl_block_fcp->ipl_info.fcp.devno);
 762
 763 static struct attribute *reipl_fcp_attrs[] = {
 764         &sys_reipl_fcp_device_attr.attr,
 765         &sys_reipl_fcp_wwpn_attr.attr,
 766         &sys_reipl_fcp_lun_attr.attr,
 767         &sys_reipl_fcp_bootprog_attr.attr,
 768         &sys_reipl_fcp_br_lba_attr.attr,
 769         NULL,
 770 };
 771
 772 static struct attribute_group reipl_fcp_attr_group = {
 773         .attrs = reipl_fcp_attrs,
 774 };
 775
 776 /* CCW reipl device attributes */
 777
 778 DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
 779         reipl_block_ccw->ipl_info.ccw.devno);
 780
 781 static void reipl_get_ascii_loadparm(char *loadparm,
 782                                      struct ipl_parameter_block *ibp)
 783 {
 784         memcpy(loadparm, ibp->ipl_info.ccw.load_parm, LOADPARM_LEN);
 785         EBCASC(loadparm, LOADPARM_LEN);
 786         loadparm[LOADPARM_LEN] = 0;
 787         strim(loadparm);
 788 }
 789
 790 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
 791                                            char *page)
 792 {
 793         char buf[LOADPARM_LEN + 1];
 794
 795         reipl_get_ascii_loadparm(buf, ipb);
 796         return sprintf(page, "%s\n", buf);
 797 }
 798
 799 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
 800                                             const char *buf, size_t len)
 801 {
 802         int i, lp_len;
 803
 804         /* ignore trailing newline */
 805         lp_len = len;
 806         if ((len > 0) && (buf[len - 1] == '\n'))
 807                 lp_len--;
 808         /* loadparm can have max 8 characters and must not start with a blank */
 809         if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
 810                 return -EINVAL;
 811         /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
 812         for (i = 0; i < lp_len; i++) {
 813                 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
 814                     (buf[i] == '.'))
 815                         continue;
 816                 return -EINVAL;
 817         }
 818         /* initialize loadparm with blanks */
 819         memset(ipb->ipl_info.ccw.load_parm, ' ', LOADPARM_LEN);
 820         /* copy and convert to ebcdic */
 821         memcpy(ipb->ipl_info.ccw.load_parm, buf, lp_len);
 822         ASCEBC(ipb->ipl_info.ccw.load_parm, LOADPARM_LEN);
 823         return len;
 824 }
 825
 826 /* NSS wrapper */
 827 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
 828                                        struct kobj_attribute *attr, char *page)
 829 {
 830         return reipl_generic_loadparm_show(reipl_block_nss, page);
 831 }
 832
 833 static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
 834                                         struct kobj_attribute *attr,
 835                                         const char *buf, size_t len)
 836 {
 837         return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
 838 }
 839
 840 /* CCW wrapper */
 841 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
 842                                        struct kobj_attribute *attr, char *page)
 843 {
 844         return reipl_generic_loadparm_show(reipl_block_ccw, page);
 845 }
 846
 847 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
 848                                         struct kobj_attribute *attr,
 849                                         const char *buf, size_t len)
 850 {
 851         return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
 852 }
 853
 854 static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
 855         __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
 856                                             reipl_ccw_loadparm_store);
 857
 858 static struct attribute *reipl_ccw_attrs_vm[] = {
 859         &sys_reipl_ccw_device_attr.attr,
 860         &sys_reipl_ccw_loadparm_attr.attr,
 861         &sys_reipl_ccw_vmparm_attr.attr,
 862         NULL,
 863 };
 864
 865 static struct attribute *reipl_ccw_attrs_lpar[] = {
 866         &sys_reipl_ccw_device_attr.attr,
 867         &sys_reipl_ccw_loadparm_attr.attr,
 868         NULL,
 869 };
 870
 871 static struct attribute_group reipl_ccw_attr_group_vm = {
 872         .name  = IPL_CCW_STR,
 873         .attrs = reipl_ccw_attrs_vm,
 874 };
 875
 876 static struct attribute_group reipl_ccw_attr_group_lpar = {
 877         .name  = IPL_CCW_STR,
 878         .attrs = reipl_ccw_attrs_lpar,
 879 };
 880
 881
 882 /* NSS reipl device attributes */
 883 static void reipl_get_ascii_nss_name(char *dst,
 884                                      struct ipl_parameter_block *ipb)
 885 {
 886         memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
 887         EBCASC(dst, NSS_NAME_SIZE);
 888         dst[NSS_NAME_SIZE] = 0;
 889 }
 890
 891 static ssize_t reipl_nss_name_show(struct kobject *kobj,
 892                                    struct kobj_attribute *attr, char *page)
 893 {
 894         char nss_name[NSS_NAME_SIZE + 1] = {};
 895
 896         reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
 897         return sprintf(page, "%s\n", nss_name);
 898 }
 899
 900 static ssize_t reipl_nss_name_store(struct kobject *kobj,
 901                                     struct kobj_attribute *attr,
 902                                     const char *buf, size_t len)
 903 {
 904         int nss_len;
 905
 906         /* ignore trailing newline */
 907         nss_len = len;
 908         if ((len > 0) && (buf[len - 1] == '\n'))
 909                 nss_len--;
 910
 911         if (nss_len > NSS_NAME_SIZE)
 912                 return -EINVAL;
 913
 914         memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
 915         if (nss_len > 0) {
 916                 reipl_block_nss->ipl_info.ccw.vm_flags |=
 917                         DIAG308_VM_FLAGS_NSS_VALID;
 918                 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
 919                 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
 920                 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
 921         } else {
 922                 reipl_block_nss->ipl_info.ccw.vm_flags &=
 923                         ~DIAG308_VM_FLAGS_NSS_VALID;
 924         }
 925
 926         return len;
 927 }
 928
 929 static struct kobj_attribute sys_reipl_nss_name_attr =
 930         __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
 931                                         reipl_nss_name_store);
 932
 933 static struct kobj_attribute sys_reipl_nss_loadparm_attr =
 934         __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
 935                                             reipl_nss_loadparm_store);
 936
 937 static struct attribute *reipl_nss_attrs[] = {
 938         &sys_reipl_nss_name_attr.attr,
 939         &sys_reipl_nss_loadparm_attr.attr,
 940         &sys_reipl_nss_vmparm_attr.attr,
 941         NULL,
 942 };
 943
 944 static struct attribute_group reipl_nss_attr_group = {
 945         .name  = IPL_NSS_STR,
 946         .attrs = reipl_nss_attrs,
 947 };
 948
 949 /* reipl type */
 950
 951 static int reipl_set_type(enum ipl_type type)
 952 {
 953         if (!(reipl_capabilities & type))
 954                 return -EINVAL;
 955
 956         switch(type) {
 957         case IPL_TYPE_CCW:
 958                 if (diag308_set_works)
 959                         reipl_method = REIPL_METHOD_CCW_DIAG;
 960                 else if (MACHINE_IS_VM)
 961                         reipl_method = REIPL_METHOD_CCW_VM;
 962                 else
 963                         reipl_method = REIPL_METHOD_CCW_CIO;
 964                 reipl_block_actual = reipl_block_ccw;
 965                 break;
 966         case IPL_TYPE_FCP:
 967                 if (diag308_set_works)
 968                         reipl_method = REIPL_METHOD_FCP_RW_DIAG;
 969                 else if (MACHINE_IS_VM)
 970                         reipl_method = REIPL_METHOD_FCP_RO_VM;
 971                 else
 972                         reipl_method = REIPL_METHOD_FCP_RO_DIAG;
 973                 reipl_block_actual = reipl_block_fcp;
 974                 break;
 975         case IPL_TYPE_FCP_DUMP:
 976                 reipl_method = REIPL_METHOD_FCP_DUMP;
 977                 break;
 978         case IPL_TYPE_NSS:
 979                 if (diag308_set_works)
 980                         reipl_method = REIPL_METHOD_NSS_DIAG;
 981                 else
 982                         reipl_method = REIPL_METHOD_NSS;
 983                 reipl_block_actual = reipl_block_nss;
 984                 break;
 985         case IPL_TYPE_UNKNOWN:
 986                 reipl_method = REIPL_METHOD_DEFAULT;
 987                 break;
 988         default:
 989                 BUG();
 990         }
 991         reipl_type = type;
 992         return 0;
 993 }
 994
 995 static ssize_t reipl_type_show(struct kobject *kobj,
 996                                struct kobj_attribute *attr, char *page)
 997 {
 998         return sprintf(page, "%s\n", ipl_type_str(reipl_type));
 999 }
1000
1001 static ssize_t reipl_type_store(struct kobject *kobj,
1002                                 struct kobj_attribute *attr,
1003                                 const char *buf, size_t len)
1004 {
1005         int rc = -EINVAL;
1006
1007         if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1008                 rc = reipl_set_type(IPL_TYPE_CCW);
1009         else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1010                 rc = reipl_set_type(IPL_TYPE_FCP);
1011         else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1012                 rc = reipl_set_type(IPL_TYPE_NSS);
1013         return (rc != 0) ? rc : len;
1014 }
1015
1016 static struct kobj_attribute reipl_type_attr =
1017         __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
1018
1019 static struct kset *reipl_kset;
1020 static struct kset *reipl_fcp_kset;
1021
1022 static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
1023                            const enum ipl_method m)
1024 {
1025         char loadparm[LOADPARM_LEN + 1] = {};
1026         char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
1027         char nss_name[NSS_NAME_SIZE + 1] = {};
1028         size_t pos = 0;
1029
1030         reipl_get_ascii_loadparm(loadparm, ipb);
1031         reipl_get_ascii_nss_name(nss_name, ipb);
1032         reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
1033
1034         switch (m) {
1035         case REIPL_METHOD_CCW_VM:
1036                 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
1037                 break;
1038         case REIPL_METHOD_NSS:
1039                 pos = sprintf(dst, "IPL %s", nss_name);
1040                 break;
1041         default:
1042                 break;
1043         }
1044         if (strlen(loadparm) > 0)
1045                 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
1046         if (strlen(vmparm) > 0)
1047                 sprintf(dst + pos, " PARM %s", vmparm);
1048 }
1049
1050 static void __reipl_run(void *unused)
1051 {
1052         struct ccw_dev_id devid;
1053         static char buf[128];
1054
1055         switch (reipl_method) {
1056         case REIPL_METHOD_CCW_CIO:
1057                 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
1058                 devid.ssid  = 0;
1059                 reipl_ccw_dev(&devid);
1060                 break;
1061         case REIPL_METHOD_CCW_VM:
1062                 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
1063                 __cpcmd(buf, NULL, 0, NULL);
1064                 break;
1065         case REIPL_METHOD_CCW_DIAG:
1066                 diag308(DIAG308_SET, reipl_block_ccw);
1067                 diag308(DIAG308_IPL, NULL);
1068                 break;
1069         case REIPL_METHOD_FCP_RW_DIAG:
1070                 diag308(DIAG308_SET, reipl_block_fcp);
1071                 diag308(DIAG308_IPL, NULL);
1072                 break;
1073         case REIPL_METHOD_FCP_RO_DIAG:
1074                 diag308(DIAG308_IPL, NULL);
1075                 break;
1076         case REIPL_METHOD_FCP_RO_VM:
1077                 __cpcmd("IPL", NULL, 0, NULL);
1078                 break;
1079         case REIPL_METHOD_NSS_DIAG:
1080                 diag308(DIAG308_SET, reipl_block_nss);
1081                 diag308(DIAG308_IPL, NULL);
1082                 break;
1083         case REIPL_METHOD_NSS:
1084                 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
1085                 __cpcmd(buf, NULL, 0, NULL);
1086                 break;
1087         case REIPL_METHOD_DEFAULT:
1088                 if (MACHINE_IS_VM)
1089                         __cpcmd("IPL", NULL, 0, NULL);
1090                 diag308(DIAG308_IPL, NULL);
1091                 break;
1092         case REIPL_METHOD_FCP_DUMP:
1093                 break;
1094         }
1095         disabled_wait((unsigned long) __builtin_return_address(0));
1096 }
1097
1098 static void reipl_run(struct shutdown_trigger *trigger)
1099 {
1100         smp_switch_to_ipl_cpu(__reipl_run, NULL);
1101 }
1102
1103 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
1104 {
1105         ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
1106         ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1107         ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1108         ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1109 }
1110
1111 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1112 {
1113         /* LOADPARM */
1114         /* check if read scp info worked and set loadparm */
1115         if (sclp_ipl_info.is_valid)
1116                 memcpy(ipb->ipl_info.ccw.load_parm,
1117                                 &sclp_ipl_info.loadparm, LOADPARM_LEN);
1118         else
1119                 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1120                 memset(ipb->ipl_info.ccw.load_parm, 0x40, LOADPARM_LEN);
1121         ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
1122
1123         /* VM PARM */
1124         if (MACHINE_IS_VM && diag308_set_works &&
1125             (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1126
1127                 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1128                 ipb->ipl_info.ccw.vm_parm_len =
1129                                         ipl_block.ipl_info.ccw.vm_parm_len;
1130                 memcpy(ipb->ipl_info.ccw.vm_parm,
1131                        ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1132         }
1133 }
1134
1135 static int __init reipl_nss_init(void)
1136 {
1137         int rc;
1138
1139         if (!MACHINE_IS_VM)
1140                 return 0;
1141
1142         reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1143         if (!reipl_block_nss)
1144                 return -ENOMEM;
1145
1146         if (!diag308_set_works)
1147                 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO;
1148
1149         rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1150         if (rc)
1151                 return rc;
1152
1153         reipl_block_ccw_init(reipl_block_nss);
1154         if (ipl_info.type == IPL_TYPE_NSS) {
1155                 memset(reipl_block_nss->ipl_info.ccw.nss_name,
1156                         ' ', NSS_NAME_SIZE);
1157                 memcpy(reipl_block_nss->ipl_info.ccw.nss_name,
1158                         kernel_nss_name, strlen(kernel_nss_name));
1159                 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
1160                 reipl_block_nss->ipl_info.ccw.vm_flags |=
1161                         DIAG308_VM_FLAGS_NSS_VALID;
1162
1163                 reipl_block_ccw_fill_parms(reipl_block_nss);
1164         }
1165
1166         reipl_capabilities |= IPL_TYPE_NSS;
1167         return 0;
1168 }
1169
1170 static int __init reipl_ccw_init(void)
1171 {
1172         int rc;
1173
1174         reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1175         if (!reipl_block_ccw)
1176                 return -ENOMEM;
1177
1178         if (MACHINE_IS_VM) {
1179                 if (!diag308_set_works)
1180                         sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
1181                 rc = sysfs_create_group(&reipl_kset->kobj,
1182                                         &reipl_ccw_attr_group_vm);
1183         } else {
1184                 if(!diag308_set_works)
1185                         sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
1186                 rc = sysfs_create_group(&reipl_kset->kobj,
1187                                         &reipl_ccw_attr_group_lpar);
1188         }
1189         if (rc)
1190                 return rc;
1191
1192         reipl_block_ccw_init(reipl_block_ccw);
1193         if (ipl_info.type == IPL_TYPE_CCW) {
1194                 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
1195                 reipl_block_ccw_fill_parms(reipl_block_ccw);
1196         }
1197
1198         reipl_capabilities |= IPL_TYPE_CCW;
1199         return 0;
1200 }
1201
1202 static int __init reipl_fcp_init(void)
1203 {
1204         int rc;
1205
1206         if (!diag308_set_works) {
1207                 if (ipl_info.type == IPL_TYPE_FCP) {
1208                         make_attrs_ro(reipl_fcp_attrs);
1209                         sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO;
1210                 } else
1211                         return 0;
1212         }
1213
1214         reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1215         if (!reipl_block_fcp)
1216                 return -ENOMEM;
1217
1218         /* sysfs: create fcp kset for mixing attr group and bin attrs */
1219         reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1220                                              &reipl_kset->kobj);
1221         if (!reipl_kset) {
1222                 free_page((unsigned long) reipl_block_fcp);
1223                 return -ENOMEM;
1224         }
1225
1226         rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1227         if (rc) {
1228                 kset_unregister(reipl_fcp_kset);
1229                 free_page((unsigned long) reipl_block_fcp);
1230                 return rc;
1231         }
1232
1233         rc = sysfs_create_bin_file(&reipl_fcp_kset->kobj,
1234                                    &sys_reipl_fcp_scp_data_attr);
1235         if (rc) {
1236                 sysfs_remove_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1237                 kset_unregister(reipl_fcp_kset);
1238                 free_page((unsigned long) reipl_block_fcp);
1239                 return rc;
1240         }
1241
1242         if (ipl_info.type == IPL_TYPE_FCP)
1243                 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
1244         else {
1245                 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1246                 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1247                 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1248                 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1249                 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1250         }
1251         reipl_capabilities |= IPL_TYPE_FCP;
1252         return 0;
1253 }
1254
1255 static int __init reipl_init(void)
1256 {
1257         int rc;
1258
1259         reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1260         if (!reipl_kset)
1261                 return -ENOMEM;
1262         rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1263         if (rc) {
1264                 kset_unregister(reipl_kset);
1265                 return rc;
1266         }
1267         rc = reipl_ccw_init();
1268         if (rc)
1269                 return rc;
1270         rc = reipl_fcp_init();
1271         if (rc)
1272                 return rc;
1273         rc = reipl_nss_init();
1274         if (rc)
1275                 return rc;
1276         rc = reipl_set_type(ipl_info.type);
1277         if (rc)
1278                 return rc;
1279         return 0;
1280 }
1281
1282 static struct shutdown_action __refdata reipl_action = {
1283         .name   = SHUTDOWN_ACTION_REIPL_STR,
1284         .fn     = reipl_run,
1285         .init   = reipl_init,
1286 };
1287
1288 /*
1289  * dump shutdown action: Dump Linux on shutdown.
1290  */
1291
1292 /* FCP dump device attributes */
1293
1294 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n",
1295                    dump_block_fcp->ipl_info.fcp.wwpn);
1296 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n",
1297                    dump_block_fcp->ipl_info.fcp.lun);
1298 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1299                    dump_block_fcp->ipl_info.fcp.bootprog);
1300 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1301                    dump_block_fcp->ipl_info.fcp.br_lba);
1302 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1303                    dump_block_fcp->ipl_info.fcp.devno);
1304
1305 static struct attribute *dump_fcp_attrs[] = {
1306         &sys_dump_fcp_device_attr.attr,
1307         &sys_dump_fcp_wwpn_attr.attr,
1308         &sys_dump_fcp_lun_attr.attr,
1309         &sys_dump_fcp_bootprog_attr.attr,
1310         &sys_dump_fcp_br_lba_attr.attr,
1311         NULL,
1312 };
1313
1314 static struct attribute_group dump_fcp_attr_group = {
1315         .name  = IPL_FCP_STR,
1316         .attrs = dump_fcp_attrs,
1317 };
1318
1319 /* CCW dump device attributes */
1320
1321 DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
1322                    dump_block_ccw->ipl_info.ccw.devno);
1323
1324 static struct attribute *dump_ccw_attrs[] = {
1325         &sys_dump_ccw_device_attr.attr,
1326         NULL,
1327 };
1328
1329 static struct attribute_group dump_ccw_attr_group = {
1330         .name  = IPL_CCW_STR,
1331         .attrs = dump_ccw_attrs,
1332 };
1333
1334 /* dump type */
1335
1336 static int dump_set_type(enum dump_type type)
1337 {
1338         if (!(dump_capabilities & type))
1339                 return -EINVAL;
1340         switch (type) {
1341         case DUMP_TYPE_CCW:
1342                 if (diag308_set_works)
1343                         dump_method = DUMP_METHOD_CCW_DIAG;
1344                 else if (MACHINE_IS_VM)
1345                         dump_method = DUMP_METHOD_CCW_VM;
1346                 else
1347                         dump_method = DUMP_METHOD_CCW_CIO;
1348                 break;
1349         case DUMP_TYPE_FCP:
1350                 dump_method = DUMP_METHOD_FCP_DIAG;
1351                 break;
1352         default:
1353                 dump_method = DUMP_METHOD_NONE;
1354         }
1355         dump_type = type;
1356         return 0;
1357 }
1358
1359 static ssize_t dump_type_show(struct kobject *kobj,
1360                               struct kobj_attribute *attr, char *page)
1361 {
1362         return sprintf(page, "%s\n", dump_type_str(dump_type));
1363 }
1364
1365 static ssize_t dump_type_store(struct kobject *kobj,
1366                                struct kobj_attribute *attr,
1367                                const char *buf, size_t len)
1368 {
1369         int rc = -EINVAL;
1370
1371         if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1372                 rc = dump_set_type(DUMP_TYPE_NONE);
1373         else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1374                 rc = dump_set_type(DUMP_TYPE_CCW);
1375         else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1376                 rc = dump_set_type(DUMP_TYPE_FCP);
1377         return (rc != 0) ? rc : len;
1378 }
1379
1380 static struct kobj_attribute dump_type_attr =
1381         __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1382
1383 static struct kset *dump_kset;
1384
1385 static void __dump_run(void *unused)
1386 {
1387         struct ccw_dev_id devid;
1388         static char buf[100];
1389
1390         switch (dump_method) {
1391         case DUMP_METHOD_CCW_CIO:
1392                 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
1393                 devid.ssid  = 0;
1394                 reipl_ccw_dev(&devid);
1395                 break;
1396         case DUMP_METHOD_CCW_VM:
1397                 sprintf(buf, "STORE STATUS");
1398                 __cpcmd(buf, NULL, 0, NULL);
1399                 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
1400                 __cpcmd(buf, NULL, 0, NULL);
1401                 break;
1402         case DUMP_METHOD_CCW_DIAG:
1403                 diag308(DIAG308_SET, dump_block_ccw);
1404                 diag308(DIAG308_DUMP, NULL);
1405                 break;
1406         case DUMP_METHOD_FCP_DIAG:
1407                 diag308(DIAG308_SET, dump_block_fcp);
1408                 diag308(DIAG308_DUMP, NULL);
1409                 break;
1410         default:
1411                 break;
1412         }
1413 }
1414
1415 static void dump_run(struct shutdown_trigger *trigger)
1416 {
1417         if (dump_method == DUMP_METHOD_NONE)
1418                 return;
1419         smp_send_stop();
1420         smp_switch_to_ipl_cpu(__dump_run, NULL);
1421 }
1422
1423 static int __init dump_ccw_init(void)
1424 {
1425         int rc;
1426
1427         dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1428         if (!dump_block_ccw)
1429                 return -ENOMEM;
1430         rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1431         if (rc) {
1432                 free_page((unsigned long)dump_block_ccw);
1433                 return rc;
1434         }
1435         dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1436         dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1437         dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1438         dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1439         dump_capabilities |= DUMP_TYPE_CCW;
1440         return 0;
1441 }
1442
1443 static int __init dump_fcp_init(void)
1444 {
1445         int rc;
1446
1447         if (!sclp_ipl_info.has_dump)
1448                 return 0; /* LDIPL DUMP is not installed */
1449         if (!diag308_set_works)
1450                 return 0;
1451         dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1452         if (!dump_block_fcp)
1453                 return -ENOMEM;
1454         rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1455         if (rc) {
1456                 free_page((unsigned long)dump_block_fcp);
1457                 return rc;
1458         }
1459         dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1460         dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1461         dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1462         dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1463         dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1464         dump_capabilities |= DUMP_TYPE_FCP;
1465         return 0;
1466 }
1467
1468 static int __init dump_init(void)
1469 {
1470         int rc;
1471
1472         dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1473         if (!dump_kset)
1474                 return -ENOMEM;
1475         rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1476         if (rc) {
1477                 kset_unregister(dump_kset);
1478                 return rc;
1479         }
1480         rc = dump_ccw_init();
1481         if (rc)
1482                 return rc;
1483         rc = dump_fcp_init();
1484         if (rc)
1485                 return rc;
1486         dump_set_type(DUMP_TYPE_NONE);
1487         return 0;
1488 }
1489
1490 static struct shutdown_action __refdata dump_action = {
1491         .name   = SHUTDOWN_ACTION_DUMP_STR,
1492         .fn     = dump_run,
1493         .init   = dump_init,
1494 };
1495
1496 static void dump_reipl_run(struct shutdown_trigger *trigger)
1497 {
1498         preempt_disable();
1499         /*
1500          * Bypass dynamic address translation (DAT) when storing IPL parameter
1501          * information block address and checksum into the prefix area
1502          * (corresponding to absolute addresses 0-8191).
1503          * When enhanced DAT applies and the STE format control in one,
1504          * the absolute address is formed without prefixing. In this case a
1505          * normal store (stg/st) into the prefix area would no more match to
1506          * absolute addresses 0-8191.
1507          */
1508 #ifdef CONFIG_64BIT
1509         asm volatile("sturg %0,%1"
1510                 :: "a" ((unsigned long) reipl_block_actual),
1511                 "a" (&lowcore_ptr[smp_processor_id()]->ipib));
1512 #else
1513         asm volatile("stura %0,%1"
1514                 :: "a" ((unsigned long) reipl_block_actual),
1515                 "a" (&lowcore_ptr[smp_processor_id()]->ipib));
1516 #endif
1517         asm volatile("stura %0,%1"
1518                 :: "a" (csum_partial(reipl_block_actual,
1519                                      reipl_block_actual->hdr.len, 0)),
1520                 "a" (&lowcore_ptr[smp_processor_id()]->ipib_checksum));
1521         preempt_enable();
1522         dump_run(trigger);
1523 }
1524
1525 static int __init dump_reipl_init(void)
1526 {
1527         if (!diag308_set_works)
1528                 return -EOPNOTSUPP;
1529         else
1530                 return 0;
1531 }
1532
1533 static struct shutdown_action __refdata dump_reipl_action = {
1534         .name   = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1535         .fn     = dump_reipl_run,
1536         .init   = dump_reipl_init,
1537 };
1538
1539 /*
1540  * vmcmd shutdown action: Trigger vm command on shutdown.
1541  */
1542
1543 static char vmcmd_on_reboot[128];
1544 static char vmcmd_on_panic[128];
1545 static char vmcmd_on_halt[128];
1546 static char vmcmd_on_poff[128];
1547
1548 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1549 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1550 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1551 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1552
1553 static struct attribute *vmcmd_attrs[] = {
1554         &sys_vmcmd_on_reboot_attr.attr,
1555         &sys_vmcmd_on_panic_attr.attr,
1556         &sys_vmcmd_on_halt_attr.attr,
1557         &sys_vmcmd_on_poff_attr.attr,
1558         NULL,
1559 };
1560
1561 static struct attribute_group vmcmd_attr_group = {
1562         .attrs = vmcmd_attrs,
1563 };
1564
1565 static struct kset *vmcmd_kset;
1566
1567 static void vmcmd_run(struct shutdown_trigger *trigger)
1568 {
1569         char *cmd, *next_cmd;
1570
1571         if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1572                 cmd = vmcmd_on_reboot;
1573         else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1574                 cmd = vmcmd_on_panic;
1575         else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1576                 cmd = vmcmd_on_halt;
1577         else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1578                 cmd = vmcmd_on_poff;
1579         else
1580                 return;
1581
1582         if (strlen(cmd) == 0)
1583                 return;
1584         do {
1585                 next_cmd = strchr(cmd, '\n');
1586                 if (next_cmd) {
1587                         next_cmd[0] = 0;
1588                         next_cmd += 1;
1589                 }
1590                 __cpcmd(cmd, NULL, 0, NULL);
1591                 cmd = next_cmd;
1592         } while (cmd != NULL);
1593 }
1594
1595 static int vmcmd_init(void)
1596 {
1597         if (!MACHINE_IS_VM)
1598                 return -EOPNOTSUPP;
1599         vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1600         if (!vmcmd_kset)
1601                 return -ENOMEM;
1602         return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1603 }
1604
1605 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1606                                               vmcmd_run, vmcmd_init};
1607
1608 /*
1609  * stop shutdown action: Stop Linux on shutdown.
1610  */
1611
1612 static void stop_run(struct shutdown_trigger *trigger)
1613 {
1614         if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1615                 disabled_wait((unsigned long) __builtin_return_address(0));
1616         while (sigp(smp_processor_id(), sigp_stop) == sigp_busy)
1617                 cpu_relax();
1618         for (;;);
1619 }
1620
1621 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1622                                              stop_run, NULL};
1623
1624 /* action list */
1625
1626 static struct shutdown_action *shutdown_actions_list[] = {
1627         &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1628         &vmcmd_action, &stop_action};
1629 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1630
1631 /*
1632  * Trigger section
1633  */
1634
1635 static struct kset *shutdown_actions_kset;
1636
1637 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1638                        size_t len)
1639 {
1640         int i;
1641
1642         for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1643                 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1644                         if (shutdown_actions_list[i]->init_rc) {
1645                                 return shutdown_actions_list[i]->init_rc;
1646                         } else {
1647                                 trigger->action = shutdown_actions_list[i];
1648                                 return len;
1649                         }
1650                 }
1651         }
1652         return -EINVAL;
1653 }
1654
1655 /* on reipl */
1656
1657 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1658                                                     &reipl_action};
1659
1660 static ssize_t on_reboot_show(struct kobject *kobj,
1661                               struct kobj_attribute *attr, char *page)
1662 {
1663         return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1664 }
1665
1666 static ssize_t on_reboot_store(struct kobject *kobj,
1667                                struct kobj_attribute *attr,
1668                                const char *buf, size_t len)
1669 {
1670         return set_trigger(buf, &on_reboot_trigger, len);
1671 }
1672
1673 static struct kobj_attribute on_reboot_attr =
1674         __ATTR(on_reboot, 0644, on_reboot_show, on_reboot_store);
1675
1676 static void do_machine_restart(char *__unused)
1677 {
1678         smp_send_stop();
1679         on_reboot_trigger.action->fn(&on_reboot_trigger);
1680         reipl_run(NULL);
1681 }
1682 void (*_machine_restart)(char *command) = do_machine_restart;
1683
1684 /* on panic */
1685
1686 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1687
1688 static ssize_t on_panic_show(struct kobject *kobj,
1689                              struct kobj_attribute *attr, char *page)
1690 {
1691         return sprintf(page, "%s\n", on_panic_trigger.action->name);
1692 }
1693
1694 static ssize_t on_panic_store(struct kobject *kobj,
1695                               struct kobj_attribute *attr,
1696                               const char *buf, size_t len)
1697 {
1698         return set_trigger(buf, &on_panic_trigger, len);
1699 }
1700
1701 static struct kobj_attribute on_panic_attr =
1702         __ATTR(on_panic, 0644, on_panic_show, on_panic_store);
1703
1704 static void do_panic(void)
1705 {
1706         on_panic_trigger.action->fn(&on_panic_trigger);
1707         stop_run(&on_panic_trigger);
1708 }
1709
1710 /* on halt */
1711
1712 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1713
1714 static ssize_t on_halt_show(struct kobject *kobj,
1715                             struct kobj_attribute *attr, char *page)
1716 {
1717         return sprintf(page, "%s\n", on_halt_trigger.action->name);
1718 }
1719
1720 static ssize_t on_halt_store(struct kobject *kobj,
1721                              struct kobj_attribute *attr,
1722                              const char *buf, size_t len)
1723 {
1724         return set_trigger(buf, &on_halt_trigger, len);
1725 }
1726
1727 static struct kobj_attribute on_halt_attr =
1728         __ATTR(on_halt, 0644, on_halt_show, on_halt_store);
1729
1730
1731 static void do_machine_halt(void)
1732 {
1733         smp_send_stop();
1734         on_halt_trigger.action->fn(&on_halt_trigger);
1735         stop_run(&on_halt_trigger);
1736 }
1737 void (*_machine_halt)(void) = do_machine_halt;
1738
1739 /* on power off */
1740
1741 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1742
1743 static ssize_t on_poff_show(struct kobject *kobj,
1744                             struct kobj_attribute *attr, char *page)
1745 {
1746         return sprintf(page, "%s\n", on_poff_trigger.action->name);
1747 }
1748
1749 static ssize_t on_poff_store(struct kobject *kobj,
1750                              struct kobj_attribute *attr,
1751                              const char *buf, size_t len)
1752 {
1753         return set_trigger(buf, &on_poff_trigger, len);
1754 }
1755
1756 static struct kobj_attribute on_poff_attr =
1757         __ATTR(on_poff, 0644, on_poff_show, on_poff_store);
1758
1759
1760 static void do_machine_power_off(void)
1761 {
1762         smp_send_stop();
1763         on_poff_trigger.action->fn(&on_poff_trigger);
1764         stop_run(&on_poff_trigger);
1765 }
1766 void (*_machine_power_off)(void) = do_machine_power_off;
1767
1768 static void __init shutdown_triggers_init(void)
1769 {
1770         shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1771                                                     firmware_kobj);
1772         if (!shutdown_actions_kset)
1773                 goto fail;
1774         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1775                               &on_reboot_attr.attr))
1776                 goto fail;
1777         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1778                               &on_panic_attr.attr))
1779                 goto fail;
1780         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1781                               &on_halt_attr.attr))
1782                 goto fail;
1783         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1784                               &on_poff_attr.attr))
1785                 goto fail;
1786
1787         return;
1788 fail:
1789         panic("shutdown_triggers_init failed\n");
1790 }
1791
1792 static void __init shutdown_actions_init(void)
1793 {
1794         int i;
1795
1796         for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1797                 if (!shutdown_actions_list[i]->init)
1798                         continue;
1799                 shutdown_actions_list[i]->init_rc =
1800                         shutdown_actions_list[i]->init();
1801         }
1802 }
1803
1804 static int __init s390_ipl_init(void)
1805 {
1806         sclp_get_ipl_info(&sclp_ipl_info);
1807         shutdown_actions_init();
1808         shutdown_triggers_init();
1809         return 0;
1810 }
1811
1812 __initcall(s390_ipl_init);
1813
1814 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1815 {
1816         int sx, dx;
1817
1818         dx = 0;
1819         for (sx = 0; src[sx] != 0; sx++) {
1820                 if (src[sx] == '"')
1821                         continue;
1822                 dst[dx++] = src[sx];
1823                 if (dx >= n)
1824                         break;
1825         }
1826 }
1827
1828 static int __init vmcmd_on_reboot_setup(char *str)
1829 {
1830         if (!MACHINE_IS_VM)
1831                 return 1;
1832         strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1833         vmcmd_on_reboot[127] = 0;
1834         on_reboot_trigger.action = &vmcmd_action;
1835         return 1;
1836 }
1837 __setup("vmreboot=", vmcmd_on_reboot_setup);
1838
1839 static int __init vmcmd_on_panic_setup(char *str)
1840 {
1841         if (!MACHINE_IS_VM)
1842                 return 1;
1843         strncpy_skip_quote(vmcmd_on_panic, str, 127);
1844         vmcmd_on_panic[127] = 0;
1845         on_panic_trigger.action = &vmcmd_action;
1846         return 1;
1847 }
1848 __setup("vmpanic=", vmcmd_on_panic_setup);
1849
1850 static int __init vmcmd_on_halt_setup(char *str)
1851 {
1852         if (!MACHINE_IS_VM)
1853                 return 1;
1854         strncpy_skip_quote(vmcmd_on_halt, str, 127);
1855         vmcmd_on_halt[127] = 0;
1856         on_halt_trigger.action = &vmcmd_action;
1857         return 1;
1858 }
1859 __setup("vmhalt=", vmcmd_on_halt_setup);
1860
1861 static int __init vmcmd_on_poff_setup(char *str)
1862 {
1863         if (!MACHINE_IS_VM)
1864                 return 1;
1865         strncpy_skip_quote(vmcmd_on_poff, str, 127);
1866         vmcmd_on_poff[127] = 0;
1867         on_poff_trigger.action = &vmcmd_action;
1868         return 1;
1869 }
1870 __setup("vmpoff=", vmcmd_on_poff_setup);
1871
1872 static int on_panic_notify(struct notifier_block *self,
1873                            unsigned long event, void *data)
1874 {
1875         do_panic();
1876         return NOTIFY_OK;
1877 }
1878
1879 static struct notifier_block on_panic_nb = {
1880         .notifier_call = on_panic_notify,
1881         .priority = INT_MIN,
1882 };
1883
1884 void __init setup_ipl(void)
1885 {
1886         ipl_info.type = get_ipl_type();
1887         switch (ipl_info.type) {
1888         case IPL_TYPE_CCW:
1889                 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1890                 ipl_info.data.ccw.dev_id.ssid = 0;
1891                 break;
1892         case IPL_TYPE_FCP:
1893         case IPL_TYPE_FCP_DUMP:
1894                 ipl_info.data.fcp.dev_id.devno =
1895                         IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1896                 ipl_info.data.fcp.dev_id.ssid = 0;
1897                 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1898                 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1899                 break;
1900         case IPL_TYPE_NSS:
1901                 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1902                         sizeof(ipl_info.data.nss.name));
1903                 break;
1904         case IPL_TYPE_UNKNOWN:
1905                 /* We have no info to copy */
1906                 break;
1907         }
1908         atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1909 }
1910
1911 void __init ipl_update_parameters(void)
1912 {
1913         int rc;
1914
1915         rc = diag308(DIAG308_STORE, &ipl_block);
1916         if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
1917                 diag308_set_works = 1;
1918 }
1919
1920 void __init ipl_save_parameters(void)
1921 {
1922         struct cio_iplinfo iplinfo;
1923         void *src, *dst;
1924
1925         if (cio_get_iplinfo(&iplinfo))
1926                 return;
1927
1928         ipl_devno = iplinfo.devno;
1929         ipl_flags |= IPL_DEVNO_VALID;
1930         if (!iplinfo.is_qdio)
1931                 return;
1932         ipl_flags |= IPL_PARMBLOCK_VALID;
1933         src = (void *)(unsigned long)S390_lowcore.ipl_parmblock_ptr;
1934         dst = (void *)IPL_PARMBLOCK_ORIGIN;
1935         memmove(dst, src, PAGE_SIZE);
1936         S390_lowcore.ipl_parmblock_ptr = IPL_PARMBLOCK_ORIGIN;
1937 }
1938
1939 static LIST_HEAD(rcall);
1940 static DEFINE_MUTEX(rcall_mutex);
1941
1942 void register_reset_call(struct reset_call *reset)
1943 {
1944         mutex_lock(&rcall_mutex);
1945         list_add(&reset->list, &rcall);
1946         mutex_unlock(&rcall_mutex);
1947 }
1948 EXPORT_SYMBOL_GPL(register_reset_call);
1949
1950 void unregister_reset_call(struct reset_call *reset)
1951 {
1952         mutex_lock(&rcall_mutex);
1953         list_del(&reset->list);
1954         mutex_unlock(&rcall_mutex);
1955 }
1956 EXPORT_SYMBOL_GPL(unregister_reset_call);
1957
1958 static void do_reset_calls(void)
1959 {
1960         struct reset_call *reset;
1961
1962         list_for_each_entry(reset, &rcall, list)
1963                 reset->fn();
1964 }
1965
1966 u32 dump_prefix_page;
1967
1968 void s390_reset_system(void)
1969 {
1970         struct _lowcore *lc;
1971
1972         lc = (struct _lowcore *)(unsigned long) store_prefix();
1973
1974         /* Stack for interrupt/machine check handler */
1975         lc->panic_stack = S390_lowcore.panic_stack;
1976
1977         /* Save prefix page address for dump case */
1978         dump_prefix_page = (u32)(unsigned long) lc;
1979
1980         /* Disable prefixing */
1981         set_prefix(0);
1982
1983         /* Disable lowcore protection */
1984         __ctl_clear_bit(0,28);
1985
1986         /* Set new machine check handler */
1987         S390_lowcore.mcck_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
1988         S390_lowcore.mcck_new_psw.addr =
1989                 PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;
1990
1991         /* Set new program check handler */
1992         S390_lowcore.program_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
1993         S390_lowcore.program_new_psw.addr =
1994                 PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
1995
1996         do_reset_calls();
1997 }
1998