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