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         strim(_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         strim(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(void *unused)
 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 void ipl_run(struct shutdown_trigger *trigger)
 566 {
 567         smp_switch_to_ipl_cpu(__ipl_run, NULL);
 568 }
 569
 570 static int __init ipl_init(void)
 571 {
 572         int rc;
 573
 574         ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
 575         if (!ipl_kset) {
 576                 rc = -ENOMEM;
 577                 goto out;
 578         }
 579         switch (ipl_info.type) {
 580         case IPL_TYPE_CCW:
 581                 if (MACHINE_IS_VM)
 582                         rc = sysfs_create_group(&ipl_kset->kobj,
 583                                                 &ipl_ccw_attr_group_vm);
 584                 else
 585                         rc = sysfs_create_group(&ipl_kset->kobj,
 586                                                 &ipl_ccw_attr_group_lpar);
 587                 break;
 588         case IPL_TYPE_FCP:
 589         case IPL_TYPE_FCP_DUMP:
 590                 rc = ipl_register_fcp_files();
 591                 break;
 592         case IPL_TYPE_NSS:
 593                 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group);
 594                 break;
 595         default:
 596                 rc = sysfs_create_group(&ipl_kset->kobj,
 597                                         &ipl_unknown_attr_group);
 598                 break;
 599         }
 600 out:
 601         if (rc)
 602                 panic("ipl_init failed: rc = %i\n", rc);
 603
 604         return 0;
 605 }
 606
 607 static struct shutdown_action __refdata ipl_action = {
 608         .name   = SHUTDOWN_ACTION_IPL_STR,
 609         .fn     = ipl_run,
 610         .init   = ipl_init,
 611 };
 612
 613 /*
 614  * reipl shutdown action: Reboot Linux on shutdown.
 615  */
 616
 617 /* VM IPL PARM attributes */
 618 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
 619                                           char *page)
 620 {
 621         char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
 622
 623         reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
 624         return sprintf(page, "%s\n", vmparm);
 625 }
 626
 627 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
 628                                           size_t vmparm_max,
 629                                           const char *buf, size_t len)
 630 {
 631         int i, ip_len;
 632
 633         /* ignore trailing newline */
 634         ip_len = len;
 635         if ((len > 0) && (buf[len - 1] == '\n'))
 636                 ip_len--;
 637
 638         if (ip_len > vmparm_max)
 639                 return -EINVAL;
 640
 641         /* parm is used to store kernel options, check for common chars */
 642         for (i = 0; i < ip_len; i++)
 643                 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
 644                         return -EINVAL;
 645
 646         memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
 647         ipb->ipl_info.ccw.vm_parm_len = ip_len;
 648         if (ip_len > 0) {
 649                 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
 650                 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
 651                 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
 652         } else {
 653                 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
 654         }
 655
 656         return len;
 657 }
 658
 659 /* NSS wrapper */
 660 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
 661                                      struct kobj_attribute *attr, char *page)
 662 {
 663         return reipl_generic_vmparm_show(reipl_block_nss, page);
 664 }
 665
 666 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
 667                                       struct kobj_attribute *attr,
 668                                       const char *buf, size_t len)
 669 {
 670         return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
 671 }
 672
 673 /* CCW wrapper */
 674 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
 675                                      struct kobj_attribute *attr, char *page)
 676 {
 677         return reipl_generic_vmparm_show(reipl_block_ccw, page);
 678 }
 679
 680 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
 681                                       struct kobj_attribute *attr,
 682                                       const char *buf, size_t len)
 683 {
 684         return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
 685 }
 686
 687 static struct kobj_attribute sys_reipl_nss_vmparm_attr =
 688         __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
 689                                         reipl_nss_vmparm_store);
 690 static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
 691         __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
 692                                         reipl_ccw_vmparm_store);
 693
 694 /* FCP reipl device attributes */
 695
 696 static ssize_t reipl_fcp_scpdata_read(struct kobject *kobj,
 697                                       struct bin_attribute *attr,
 698                                       char *buf, loff_t off, size_t count)
 699 {
 700         size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
 701         void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
 702
 703         return memory_read_from_buffer(buf, count, &off, scp_data, size);
 704 }
 705
 706 static ssize_t reipl_fcp_scpdata_write(struct kobject *kobj,
 707                                        struct bin_attribute *attr,
 708                                        char *buf, loff_t off, size_t count)
 709 {
 710         size_t padding;
 711         size_t scpdata_len;
 712
 713         if (off < 0)
 714                 return -EINVAL;
 715
 716         if (off >= DIAG308_SCPDATA_SIZE)
 717                 return -ENOSPC;
 718
 719         if (count > DIAG308_SCPDATA_SIZE - off)
 720                 count = DIAG308_SCPDATA_SIZE - off;
 721
 722         memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf + off, count);
 723         scpdata_len = off + count;
 724
 725         if (scpdata_len % 8) {
 726                 padding = 8 - (scpdata_len % 8);
 727                 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
 728                        0, padding);
 729                 scpdata_len += padding;
 730         }
 731
 732         reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
 733         reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
 734         reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
 735
 736         return count;
 737 }
 738
 739 static struct bin_attribute sys_reipl_fcp_scp_data_attr = {
 740         .attr = {
 741                 .name = "scp_data",
 742                 .mode = S_IRUGO | S_IWUSR,
 743         },
 744         .size = PAGE_SIZE,
 745         .read = reipl_fcp_scpdata_read,
 746         .write = reipl_fcp_scpdata_write,
 747 };
 748
 749 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n",
 750                    reipl_block_fcp->ipl_info.fcp.wwpn);
 751 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n",
 752                    reipl_block_fcp->ipl_info.fcp.lun);
 753 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
 754                    reipl_block_fcp->ipl_info.fcp.bootprog);
 755 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
 756                    reipl_block_fcp->ipl_info.fcp.br_lba);
 757 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
 758                    reipl_block_fcp->ipl_info.fcp.devno);
 759
 760 static struct attribute *reipl_fcp_attrs[] = {
 761         &sys_reipl_fcp_device_attr.attr,
 762         &sys_reipl_fcp_wwpn_attr.attr,
 763         &sys_reipl_fcp_lun_attr.attr,
 764         &sys_reipl_fcp_bootprog_attr.attr,
 765         &sys_reipl_fcp_br_lba_attr.attr,
 766         NULL,
 767 };
 768
 769 static struct attribute_group reipl_fcp_attr_group = {
 770         .attrs = reipl_fcp_attrs,
 771 };
 772
 773 /* CCW reipl device attributes */
 774
 775 DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
 776         reipl_block_ccw->ipl_info.ccw.devno);
 777
 778 static void reipl_get_ascii_loadparm(char *loadparm,
 779                                      struct ipl_parameter_block *ibp)
 780 {
 781         memcpy(loadparm, ibp->ipl_info.ccw.load_parm, LOADPARM_LEN);
 782         EBCASC(loadparm, LOADPARM_LEN);
 783         loadparm[LOADPARM_LEN] = 0;
 784         strim(loadparm);
 785 }
 786
 787 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
 788                                            char *page)
 789 {
 790         char buf[LOADPARM_LEN + 1];
 791
 792         reipl_get_ascii_loadparm(buf, ipb);
 793         return sprintf(page, "%s\n", buf);
 794 }
 795
 796 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
 797                                             const char *buf, size_t len)
 798 {
 799         int i, lp_len;
 800
 801         /* ignore trailing newline */
 802         lp_len = len;
 803         if ((len > 0) && (buf[len - 1] == '\n'))
 804                 lp_len--;
 805         /* loadparm can have max 8 characters and must not start with a blank */
 806         if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
 807                 return -EINVAL;
 808         /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
 809         for (i = 0; i < lp_len; i++) {
 810                 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
 811                     (buf[i] == '.'))
 812                         continue;
 813                 return -EINVAL;
 814         }
 815         /* initialize loadparm with blanks */
 816         memset(ipb->ipl_info.ccw.load_parm, ' ', LOADPARM_LEN);
 817         /* copy and convert to ebcdic */
 818         memcpy(ipb->ipl_info.ccw.load_parm, buf, lp_len);
 819         ASCEBC(ipb->ipl_info.ccw.load_parm, LOADPARM_LEN);
 820         return len;
 821 }
 822
 823 /* NSS wrapper */
 824 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
 825                                        struct kobj_attribute *attr, char *page)
 826 {
 827         return reipl_generic_loadparm_show(reipl_block_nss, page);
 828 }
 829
 830 static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
 831                                         struct kobj_attribute *attr,
 832                                         const char *buf, size_t len)
 833 {
 834         return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
 835 }
 836
 837 /* CCW wrapper */
 838 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
 839                                        struct kobj_attribute *attr, char *page)
 840 {
 841         return reipl_generic_loadparm_show(reipl_block_ccw, page);
 842 }
 843
 844 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
 845                                         struct kobj_attribute *attr,
 846                                         const char *buf, size_t len)
 847 {
 848         return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
 849 }
 850
 851 static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
 852         __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
 853                                             reipl_ccw_loadparm_store);
 854
 855 static struct attribute *reipl_ccw_attrs_vm[] = {
 856         &sys_reipl_ccw_device_attr.attr,
 857         &sys_reipl_ccw_loadparm_attr.attr,
 858         &sys_reipl_ccw_vmparm_attr.attr,
 859         NULL,
 860 };
 861
 862 static struct attribute *reipl_ccw_attrs_lpar[] = {
 863         &sys_reipl_ccw_device_attr.attr,
 864         &sys_reipl_ccw_loadparm_attr.attr,
 865         NULL,
 866 };
 867
 868 static struct attribute_group reipl_ccw_attr_group_vm = {
 869         .name  = IPL_CCW_STR,
 870         .attrs = reipl_ccw_attrs_vm,
 871 };
 872
 873 static struct attribute_group reipl_ccw_attr_group_lpar = {
 874         .name  = IPL_CCW_STR,
 875         .attrs = reipl_ccw_attrs_lpar,
 876 };
 877
 878
 879 /* NSS reipl device attributes */
 880 static void reipl_get_ascii_nss_name(char *dst,
 881                                      struct ipl_parameter_block *ipb)
 882 {
 883         memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
 884         EBCASC(dst, NSS_NAME_SIZE);
 885         dst[NSS_NAME_SIZE] = 0;
 886 }
 887
 888 static ssize_t reipl_nss_name_show(struct kobject *kobj,
 889                                    struct kobj_attribute *attr, char *page)
 890 {
 891         char nss_name[NSS_NAME_SIZE + 1] = {};
 892
 893         reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
 894         return sprintf(page, "%s\n", nss_name);
 895 }
 896
 897 static ssize_t reipl_nss_name_store(struct kobject *kobj,
 898                                     struct kobj_attribute *attr,
 899                                     const char *buf, size_t len)
 900 {
 901         int nss_len;
 902
 903         /* ignore trailing newline */
 904         nss_len = len;
 905         if ((len > 0) && (buf[len - 1] == '\n'))
 906                 nss_len--;
 907
 908         if (nss_len > NSS_NAME_SIZE)
 909                 return -EINVAL;
 910
 911         memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
 912         if (nss_len > 0) {
 913                 reipl_block_nss->ipl_info.ccw.vm_flags |=
 914                         DIAG308_VM_FLAGS_NSS_VALID;
 915                 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
 916                 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
 917                 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
 918         } else {
 919                 reipl_block_nss->ipl_info.ccw.vm_flags &=
 920                         ~DIAG308_VM_FLAGS_NSS_VALID;
 921         }
 922
 923         return len;
 924 }
 925
 926 static struct kobj_attribute sys_reipl_nss_name_attr =
 927         __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
 928                                         reipl_nss_name_store);
 929
 930 static struct kobj_attribute sys_reipl_nss_loadparm_attr =
 931         __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
 932                                             reipl_nss_loadparm_store);
 933
 934 static struct attribute *reipl_nss_attrs[] = {
 935         &sys_reipl_nss_name_attr.attr,
 936         &sys_reipl_nss_loadparm_attr.attr,
 937         &sys_reipl_nss_vmparm_attr.attr,
 938         NULL,
 939 };
 940
 941 static struct attribute_group reipl_nss_attr_group = {
 942         .name  = IPL_NSS_STR,
 943         .attrs = reipl_nss_attrs,
 944 };
 945
 946 /* reipl type */
 947
 948 static int reipl_set_type(enum ipl_type type)
 949 {
 950         if (!(reipl_capabilities & type))
 951                 return -EINVAL;
 952
 953         switch(type) {
 954         case IPL_TYPE_CCW:
 955                 if (diag308_set_works)
 956                         reipl_method = REIPL_METHOD_CCW_DIAG;
 957                 else if (MACHINE_IS_VM)
 958                         reipl_method = REIPL_METHOD_CCW_VM;
 959                 else
 960                         reipl_method = REIPL_METHOD_CCW_CIO;
 961                 reipl_block_actual = reipl_block_ccw;
 962                 break;
 963         case IPL_TYPE_FCP:
 964                 if (diag308_set_works)
 965                         reipl_method = REIPL_METHOD_FCP_RW_DIAG;
 966                 else if (MACHINE_IS_VM)
 967                         reipl_method = REIPL_METHOD_FCP_RO_VM;
 968                 else
 969                         reipl_method = REIPL_METHOD_FCP_RO_DIAG;
 970                 reipl_block_actual = reipl_block_fcp;
 971                 break;
 972         case IPL_TYPE_FCP_DUMP:
 973                 reipl_method = REIPL_METHOD_FCP_DUMP;
 974                 break;
 975         case IPL_TYPE_NSS:
 976                 if (diag308_set_works)
 977                         reipl_method = REIPL_METHOD_NSS_DIAG;
 978                 else
 979                         reipl_method = REIPL_METHOD_NSS;
 980                 reipl_block_actual = reipl_block_nss;
 981                 break;
 982         case IPL_TYPE_UNKNOWN:
 983                 reipl_method = REIPL_METHOD_DEFAULT;
 984                 break;
 985         default:
 986                 BUG();
 987         }
 988         reipl_type = type;
 989         return 0;
 990 }
 991
 992 static ssize_t reipl_type_show(struct kobject *kobj,
 993                                struct kobj_attribute *attr, char *page)
 994 {
 995         return sprintf(page, "%s\n", ipl_type_str(reipl_type));
 996 }
 997
 998 static ssize_t reipl_type_store(struct kobject *kobj,
 999                                 struct kobj_attribute *attr,
1000                                 const char *buf, size_t len)
1001 {
1002         int rc = -EINVAL;
1003
1004         if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1005                 rc = reipl_set_type(IPL_TYPE_CCW);
1006         else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1007                 rc = reipl_set_type(IPL_TYPE_FCP);
1008         else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1009                 rc = reipl_set_type(IPL_TYPE_NSS);
1010         return (rc != 0) ? rc : len;
1011 }
1012
1013 static struct kobj_attribute reipl_type_attr =
1014         __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
1015
1016 static struct kset *reipl_kset;
1017 static struct kset *reipl_fcp_kset;
1018
1019 static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
1020                            const enum ipl_method m)
1021 {
1022         char loadparm[LOADPARM_LEN + 1] = {};
1023         char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
1024         char nss_name[NSS_NAME_SIZE + 1] = {};
1025         size_t pos = 0;
1026
1027         reipl_get_ascii_loadparm(loadparm, ipb);
1028         reipl_get_ascii_nss_name(nss_name, ipb);
1029         reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
1030
1031         switch (m) {
1032         case REIPL_METHOD_CCW_VM:
1033                 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
1034                 break;
1035         case REIPL_METHOD_NSS:
1036                 pos = sprintf(dst, "IPL %s", nss_name);
1037                 break;
1038         default:
1039                 break;
1040         }
1041         if (strlen(loadparm) > 0)
1042                 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
1043         if (strlen(vmparm) > 0)
1044                 sprintf(dst + pos, " PARM %s", vmparm);
1045 }
1046
1047 static void __reipl_run(void *unused)
1048 {
1049         struct ccw_dev_id devid;
1050         static char buf[128];
1051
1052         switch (reipl_method) {
1053         case REIPL_METHOD_CCW_CIO:
1054                 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
1055                 devid.ssid  = 0;
1056                 reipl_ccw_dev(&devid);
1057                 break;
1058         case REIPL_METHOD_CCW_VM:
1059                 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
1060                 __cpcmd(buf, NULL, 0, NULL);
1061                 break;
1062         case REIPL_METHOD_CCW_DIAG:
1063                 diag308(DIAG308_SET, reipl_block_ccw);
1064                 diag308(DIAG308_IPL, NULL);
1065                 break;
1066         case REIPL_METHOD_FCP_RW_DIAG:
1067                 diag308(DIAG308_SET, reipl_block_fcp);
1068                 diag308(DIAG308_IPL, NULL);
1069                 break;
1070         case REIPL_METHOD_FCP_RO_DIAG:
1071                 diag308(DIAG308_IPL, NULL);
1072                 break;
1073         case REIPL_METHOD_FCP_RO_VM:
1074                 __cpcmd("IPL", NULL, 0, NULL);
1075                 break;
1076         case REIPL_METHOD_NSS_DIAG:
1077                 diag308(DIAG308_SET, reipl_block_nss);
1078                 diag308(DIAG308_IPL, NULL);
1079                 break;
1080         case REIPL_METHOD_NSS:
1081                 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
1082                 __cpcmd(buf, NULL, 0, NULL);
1083                 break;
1084         case REIPL_METHOD_DEFAULT:
1085                 if (MACHINE_IS_VM)
1086                         __cpcmd("IPL", NULL, 0, NULL);
1087                 diag308(DIAG308_IPL, NULL);
1088                 break;
1089         case REIPL_METHOD_FCP_DUMP:
1090                 break;
1091         }
1092         disabled_wait((unsigned long) __builtin_return_address(0));
1093 }
1094
1095 static void reipl_run(struct shutdown_trigger *trigger)
1096 {
1097         smp_switch_to_ipl_cpu(__reipl_run, NULL);
1098 }
1099
1100 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
1101 {
1102         ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
1103         ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1104         ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1105         ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1106 }
1107
1108 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1109 {
1110         /* LOADPARM */
1111         /* check if read scp info worked and set loadparm */
1112         if (sclp_ipl_info.is_valid)
1113                 memcpy(ipb->ipl_info.ccw.load_parm,
1114                                 &sclp_ipl_info.loadparm, LOADPARM_LEN);
1115         else
1116                 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1117                 memset(ipb->ipl_info.ccw.load_parm, 0x40, LOADPARM_LEN);
1118         ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
1119
1120         /* VM PARM */
1121         if (MACHINE_IS_VM && diag308_set_works &&
1122             (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1123
1124                 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1125                 ipb->ipl_info.ccw.vm_parm_len =
1126                                         ipl_block.ipl_info.ccw.vm_parm_len;
1127                 memcpy(ipb->ipl_info.ccw.vm_parm,
1128                        ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1129         }
1130 }
1131
1132 static int __init reipl_nss_init(void)
1133 {
1134         int rc;
1135
1136         if (!MACHINE_IS_VM)
1137                 return 0;
1138
1139         reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1140         if (!reipl_block_nss)
1141                 return -ENOMEM;
1142
1143         if (!diag308_set_works)
1144                 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO;
1145
1146         rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1147         if (rc)
1148                 return rc;
1149
1150         reipl_block_ccw_init(reipl_block_nss);
1151         if (ipl_info.type == IPL_TYPE_NSS) {
1152                 memset(reipl_block_nss->ipl_info.ccw.nss_name,
1153                         ' ', NSS_NAME_SIZE);
1154                 memcpy(reipl_block_nss->ipl_info.ccw.nss_name,
1155                         kernel_nss_name, strlen(kernel_nss_name));
1156                 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
1157                 reipl_block_nss->ipl_info.ccw.vm_flags |=
1158                         DIAG308_VM_FLAGS_NSS_VALID;
1159
1160                 reipl_block_ccw_fill_parms(reipl_block_nss);
1161         }
1162
1163         reipl_capabilities |= IPL_TYPE_NSS;
1164         return 0;
1165 }
1166
1167 static int __init reipl_ccw_init(void)
1168 {
1169         int rc;
1170
1171         reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1172         if (!reipl_block_ccw)
1173                 return -ENOMEM;
1174
1175         if (MACHINE_IS_VM) {
1176                 if (!diag308_set_works)
1177                         sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
1178                 rc = sysfs_create_group(&reipl_kset->kobj,
1179                                         &reipl_ccw_attr_group_vm);
1180         } else {
1181                 if(!diag308_set_works)
1182                         sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
1183                 rc = sysfs_create_group(&reipl_kset->kobj,
1184                                         &reipl_ccw_attr_group_lpar);
1185         }
1186         if (rc)
1187                 return rc;
1188
1189         reipl_block_ccw_init(reipl_block_ccw);
1190         if (ipl_info.type == IPL_TYPE_CCW) {
1191                 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
1192                 reipl_block_ccw_fill_parms(reipl_block_ccw);
1193         }
1194
1195         reipl_capabilities |= IPL_TYPE_CCW;
1196         return 0;
1197 }
1198
1199 static int __init reipl_fcp_init(void)
1200 {
1201         int rc;
1202
1203         if (!diag308_set_works) {
1204                 if (ipl_info.type == IPL_TYPE_FCP) {
1205                         make_attrs_ro(reipl_fcp_attrs);
1206                         sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO;
1207                 } else
1208                         return 0;
1209         }
1210
1211         reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1212         if (!reipl_block_fcp)
1213                 return -ENOMEM;
1214
1215         /* sysfs: create fcp kset for mixing attr group and bin attrs */
1216         reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1217                                              &reipl_kset->kobj);
1218         if (!reipl_kset) {
1219                 free_page((unsigned long) reipl_block_fcp);
1220                 return -ENOMEM;
1221         }
1222
1223         rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1224         if (rc) {
1225                 kset_unregister(reipl_fcp_kset);
1226                 free_page((unsigned long) reipl_block_fcp);
1227                 return rc;
1228         }
1229
1230         rc = sysfs_create_bin_file(&reipl_fcp_kset->kobj,
1231                                    &sys_reipl_fcp_scp_data_attr);
1232         if (rc) {
1233                 sysfs_remove_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1234                 kset_unregister(reipl_fcp_kset);
1235                 free_page((unsigned long) reipl_block_fcp);
1236                 return rc;
1237         }
1238
1239         if (ipl_info.type == IPL_TYPE_FCP)
1240                 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
1241         else {
1242                 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1243                 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1244                 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1245                 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1246                 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1247         }
1248         reipl_capabilities |= IPL_TYPE_FCP;
1249         return 0;
1250 }
1251
1252 static int __init reipl_init(void)
1253 {
1254         int rc;
1255
1256         reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1257         if (!reipl_kset)
1258                 return -ENOMEM;
1259         rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1260         if (rc) {
1261                 kset_unregister(reipl_kset);
1262                 return rc;
1263         }
1264         rc = reipl_ccw_init();
1265         if (rc)
1266                 return rc;
1267         rc = reipl_fcp_init();
1268         if (rc)
1269                 return rc;
1270         rc = reipl_nss_init();
1271         if (rc)
1272                 return rc;
1273         rc = reipl_set_type(ipl_info.type);
1274         if (rc)
1275                 return rc;
1276         return 0;
1277 }
1278
1279 static struct shutdown_action __refdata reipl_action = {
1280         .name   = SHUTDOWN_ACTION_REIPL_STR,
1281         .fn     = reipl_run,
1282         .init   = reipl_init,
1283 };
1284
1285 /*
1286  * dump shutdown action: Dump Linux on shutdown.
1287  */
1288
1289 /* FCP dump device attributes */
1290
1291 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n",
1292                    dump_block_fcp->ipl_info.fcp.wwpn);
1293 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n",
1294                    dump_block_fcp->ipl_info.fcp.lun);
1295 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1296                    dump_block_fcp->ipl_info.fcp.bootprog);
1297 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1298                    dump_block_fcp->ipl_info.fcp.br_lba);
1299 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1300                    dump_block_fcp->ipl_info.fcp.devno);
1301
1302 static struct attribute *dump_fcp_attrs[] = {
1303         &sys_dump_fcp_device_attr.attr,
1304         &sys_dump_fcp_wwpn_attr.attr,
1305         &sys_dump_fcp_lun_attr.attr,
1306         &sys_dump_fcp_bootprog_attr.attr,
1307         &sys_dump_fcp_br_lba_attr.attr,
1308         NULL,
1309 };
1310
1311 static struct attribute_group dump_fcp_attr_group = {
1312         .name  = IPL_FCP_STR,
1313         .attrs = dump_fcp_attrs,
1314 };
1315
1316 /* CCW dump device attributes */
1317
1318 DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
1319                    dump_block_ccw->ipl_info.ccw.devno);
1320
1321 static struct attribute *dump_ccw_attrs[] = {
1322         &sys_dump_ccw_device_attr.attr,
1323         NULL,
1324 };
1325
1326 static struct attribute_group dump_ccw_attr_group = {
1327         .name  = IPL_CCW_STR,
1328         .attrs = dump_ccw_attrs,
1329 };
1330
1331 /* dump type */
1332
1333 static int dump_set_type(enum dump_type type)
1334 {
1335         if (!(dump_capabilities & type))
1336                 return -EINVAL;
1337         switch (type) {
1338         case DUMP_TYPE_CCW:
1339                 if (diag308_set_works)
1340                         dump_method = DUMP_METHOD_CCW_DIAG;
1341                 else if (MACHINE_IS_VM)
1342                         dump_method = DUMP_METHOD_CCW_VM;
1343                 else
1344                         dump_method = DUMP_METHOD_CCW_CIO;
1345                 break;
1346         case DUMP_TYPE_FCP:
1347                 dump_method = DUMP_METHOD_FCP_DIAG;
1348                 break;
1349         default:
1350                 dump_method = DUMP_METHOD_NONE;
1351         }
1352         dump_type = type;
1353         return 0;
1354 }
1355
1356 static ssize_t dump_type_show(struct kobject *kobj,
1357                               struct kobj_attribute *attr, char *page)
1358 {
1359         return sprintf(page, "%s\n", dump_type_str(dump_type));
1360 }
1361
1362 static ssize_t dump_type_store(struct kobject *kobj,
1363                                struct kobj_attribute *attr,
1364                                const char *buf, size_t len)
1365 {
1366         int rc = -EINVAL;
1367
1368         if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1369                 rc = dump_set_type(DUMP_TYPE_NONE);
1370         else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1371                 rc = dump_set_type(DUMP_TYPE_CCW);
1372         else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1373                 rc = dump_set_type(DUMP_TYPE_FCP);
1374         return (rc != 0) ? rc : len;
1375 }
1376
1377 static struct kobj_attribute dump_type_attr =
1378         __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1379
1380 static struct kset *dump_kset;
1381
1382 static void __dump_run(void *unused)
1383 {
1384         struct ccw_dev_id devid;
1385         static char buf[100];
1386
1387         switch (dump_method) {
1388         case DUMP_METHOD_CCW_CIO:
1389                 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
1390                 devid.ssid  = 0;
1391                 reipl_ccw_dev(&devid);
1392                 break;
1393         case DUMP_METHOD_CCW_VM:
1394                 sprintf(buf, "STORE STATUS");
1395                 __cpcmd(buf, NULL, 0, NULL);
1396                 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
1397                 __cpcmd(buf, NULL, 0, NULL);
1398                 break;
1399         case DUMP_METHOD_CCW_DIAG:
1400                 diag308(DIAG308_SET, dump_block_ccw);
1401                 diag308(DIAG308_DUMP, NULL);
1402                 break;
1403         case DUMP_METHOD_FCP_DIAG:
1404                 diag308(DIAG308_SET, dump_block_fcp);
1405                 diag308(DIAG308_DUMP, NULL);
1406                 break;
1407         default:
1408                 break;
1409         }
1410 }
1411
1412 static void dump_run(struct shutdown_trigger *trigger)
1413 {
1414         if (dump_method == DUMP_METHOD_NONE)
1415                 return;
1416         smp_send_stop();
1417         smp_switch_to_ipl_cpu(__dump_run, NULL);
1418 }
1419
1420 static int __init dump_ccw_init(void)
1421 {
1422         int rc;
1423
1424         dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1425         if (!dump_block_ccw)
1426                 return -ENOMEM;
1427         rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1428         if (rc) {
1429                 free_page((unsigned long)dump_block_ccw);
1430                 return rc;
1431         }
1432         dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1433         dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1434         dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1435         dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1436         dump_capabilities |= DUMP_TYPE_CCW;
1437         return 0;
1438 }
1439
1440 static int __init dump_fcp_init(void)
1441 {
1442         int rc;
1443
1444         if (!sclp_ipl_info.has_dump)
1445                 return 0; /* LDIPL DUMP is not installed */
1446         if (!diag308_set_works)
1447                 return 0;
1448         dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1449         if (!dump_block_fcp)
1450                 return -ENOMEM;
1451         rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1452         if (rc) {
1453                 free_page((unsigned long)dump_block_fcp);
1454                 return rc;
1455         }
1456         dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1457         dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1458         dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1459         dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1460         dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1461         dump_capabilities |= DUMP_TYPE_FCP;
1462         return 0;
1463 }
1464
1465 static int __init dump_init(void)
1466 {
1467         int rc;
1468
1469         dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1470         if (!dump_kset)
1471                 return -ENOMEM;
1472         rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1473         if (rc) {
1474                 kset_unregister(dump_kset);
1475                 return rc;
1476         }
1477         rc = dump_ccw_init();
1478         if (rc)
1479                 return rc;
1480         rc = dump_fcp_init();
1481         if (rc)
1482                 return rc;
1483         dump_set_type(DUMP_TYPE_NONE);
1484         return 0;
1485 }
1486
1487 static struct shutdown_action __refdata dump_action = {
1488         .name   = SHUTDOWN_ACTION_DUMP_STR,
1489         .fn     = dump_run,
1490         .init   = dump_init,
1491 };
1492
1493 static void dump_reipl_run(struct shutdown_trigger *trigger)
1494 {
1495         preempt_disable();
1496         /*
1497          * Bypass dynamic address translation (DAT) when storing IPL parameter
1498          * information block address and checksum into the prefix area
1499          * (corresponding to absolute addresses 0-8191).
1500          * When enhanced DAT applies and the STE format control in one,
1501          * the absolute address is formed without prefixing. In this case a
1502          * normal store (stg/st) into the prefix area would no more match to
1503          * absolute addresses 0-8191.
1504          */
1505 #ifdef CONFIG_64BIT
1506         asm volatile("sturg %0,%1"
1507                 :: "a" ((unsigned long) reipl_block_actual),
1508                 "a" (&lowcore_ptr[smp_processor_id()]->ipib));
1509 #else
1510         asm volatile("stura %0,%1"
1511                 :: "a" ((unsigned long) reipl_block_actual),
1512                 "a" (&lowcore_ptr[smp_processor_id()]->ipib));
1513 #endif
1514         asm volatile("stura %0,%1"
1515                 :: "a" (csum_partial(reipl_block_actual,
1516                                      reipl_block_actual->hdr.len, 0)),
1517                 "a" (&lowcore_ptr[smp_processor_id()]->ipib_checksum));
1518         preempt_enable();
1519         dump_run(trigger);
1520 }
1521
1522 static int __init dump_reipl_init(void)
1523 {
1524         if (!diag308_set_works)
1525                 return -EOPNOTSUPP;
1526         else
1527                 return 0;
1528 }
1529
1530 static struct shutdown_action __refdata dump_reipl_action = {
1531         .name   = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1532         .fn     = dump_reipl_run,
1533         .init   = dump_reipl_init,
1534 };
1535
1536 /*
1537  * vmcmd shutdown action: Trigger vm command on shutdown.
1538  */
1539
1540 static char vmcmd_on_reboot[128];
1541 static char vmcmd_on_panic[128];
1542 static char vmcmd_on_halt[128];
1543 static char vmcmd_on_poff[128];
1544
1545 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1546 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1547 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1548 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1549
1550 static struct attribute *vmcmd_attrs[] = {
1551         &sys_vmcmd_on_reboot_attr.attr,
1552         &sys_vmcmd_on_panic_attr.attr,
1553         &sys_vmcmd_on_halt_attr.attr,
1554         &sys_vmcmd_on_poff_attr.attr,
1555         NULL,
1556 };
1557
1558 static struct attribute_group vmcmd_attr_group = {
1559         .attrs = vmcmd_attrs,
1560 };
1561
1562 static struct kset *vmcmd_kset;
1563
1564 static void vmcmd_run(struct shutdown_trigger *trigger)
1565 {
1566         char *cmd, *next_cmd;
1567
1568         if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1569                 cmd = vmcmd_on_reboot;
1570         else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1571                 cmd = vmcmd_on_panic;
1572         else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1573                 cmd = vmcmd_on_halt;
1574         else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1575                 cmd = vmcmd_on_poff;
1576         else
1577                 return;
1578
1579         if (strlen(cmd) == 0)
1580                 return;
1581         do {
1582                 next_cmd = strchr(cmd, '\n');
1583                 if (next_cmd) {
1584                         next_cmd[0] = 0;
1585                         next_cmd += 1;
1586                 }
1587                 __cpcmd(cmd, NULL, 0, NULL);
1588                 cmd = next_cmd;
1589         } while (cmd != NULL);
1590 }
1591
1592 static int vmcmd_init(void)
1593 {
1594         if (!MACHINE_IS_VM)
1595                 return -EOPNOTSUPP;
1596         vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1597         if (!vmcmd_kset)
1598                 return -ENOMEM;
1599         return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1600 }
1601
1602 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1603                                               vmcmd_run, vmcmd_init};
1604
1605 /*
1606  * stop shutdown action: Stop Linux on shutdown.
1607  */
1608
1609 static void stop_run(struct shutdown_trigger *trigger)
1610 {
1611         if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1612                 disabled_wait((unsigned long) __builtin_return_address(0));
1613         while (sigp(smp_processor_id(), sigp_stop) == sigp_busy)
1614                 cpu_relax();
1615         for (;;);
1616 }
1617
1618 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1619                                              stop_run, NULL};
1620
1621 /* action list */
1622
1623 static struct shutdown_action *shutdown_actions_list[] = {
1624         &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1625         &vmcmd_action, &stop_action};
1626 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1627
1628 /*
1629  * Trigger section
1630  */
1631
1632 static struct kset *shutdown_actions_kset;
1633
1634 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1635                        size_t len)
1636 {
1637         int i;
1638
1639         for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1640                 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1641                         if (shutdown_actions_list[i]->init_rc) {
1642                                 return shutdown_actions_list[i]->init_rc;
1643                         } else {
1644                                 trigger->action = shutdown_actions_list[i];
1645                                 return len;
1646                         }
1647                 }
1648         }
1649         return -EINVAL;
1650 }
1651
1652 /* on reipl */
1653
1654 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1655                                                     &reipl_action};
1656
1657 static ssize_t on_reboot_show(struct kobject *kobj,
1658                               struct kobj_attribute *attr, char *page)
1659 {
1660         return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1661 }
1662
1663 static ssize_t on_reboot_store(struct kobject *kobj,
1664                                struct kobj_attribute *attr,
1665                                const char *buf, size_t len)
1666 {
1667         return set_trigger(buf, &on_reboot_trigger, len);
1668 }
1669
1670 static struct kobj_attribute on_reboot_attr =
1671         __ATTR(on_reboot, 0644, on_reboot_show, on_reboot_store);
1672
1673 static void do_machine_restart(char *__unused)
1674 {
1675         smp_send_stop();
1676         on_reboot_trigger.action->fn(&on_reboot_trigger);
1677         reipl_run(NULL);
1678 }
1679 void (*_machine_restart)(char *command) = do_machine_restart;
1680
1681 /* on panic */
1682
1683 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1684
1685 static ssize_t on_panic_show(struct kobject *kobj,
1686                              struct kobj_attribute *attr, char *page)
1687 {
1688         return sprintf(page, "%s\n", on_panic_trigger.action->name);
1689 }
1690
1691 static ssize_t on_panic_store(struct kobject *kobj,
1692                               struct kobj_attribute *attr,
1693                               const char *buf, size_t len)
1694 {
1695         return set_trigger(buf, &on_panic_trigger, len);
1696 }
1697
1698 static struct kobj_attribute on_panic_attr =
1699         __ATTR(on_panic, 0644, on_panic_show, on_panic_store);
1700
1701 static void do_panic(void)
1702 {
1703         on_panic_trigger.action->fn(&on_panic_trigger);
1704         stop_run(&on_panic_trigger);
1705 }
1706
1707 /* on halt */
1708
1709 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1710
1711 static ssize_t on_halt_show(struct kobject *kobj,
1712                             struct kobj_attribute *attr, char *page)
1713 {
1714         return sprintf(page, "%s\n", on_halt_trigger.action->name);
1715 }
1716
1717 static ssize_t on_halt_store(struct kobject *kobj,
1718                              struct kobj_attribute *attr,
1719                              const char *buf, size_t len)
1720 {
1721         return set_trigger(buf, &on_halt_trigger, len);
1722 }
1723
1724 static struct kobj_attribute on_halt_attr =
1725         __ATTR(on_halt, 0644, on_halt_show, on_halt_store);
1726
1727
1728 static void do_machine_halt(void)
1729 {
1730         smp_send_stop();
1731         on_halt_trigger.action->fn(&on_halt_trigger);
1732         stop_run(&on_halt_trigger);
1733 }
1734 void (*_machine_halt)(void) = do_machine_halt;
1735
1736 /* on power off */
1737
1738 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1739
1740 static ssize_t on_poff_show(struct kobject *kobj,
1741                             struct kobj_attribute *attr, char *page)
1742 {
1743         return sprintf(page, "%s\n", on_poff_trigger.action->name);
1744 }
1745
1746 static ssize_t on_poff_store(struct kobject *kobj,
1747                              struct kobj_attribute *attr,
1748                              const char *buf, size_t len)
1749 {
1750         return set_trigger(buf, &on_poff_trigger, len);
1751 }
1752
1753 static struct kobj_attribute on_poff_attr =
1754         __ATTR(on_poff, 0644, on_poff_show, on_poff_store);
1755
1756
1757 static void do_machine_power_off(void)
1758 {
1759         smp_send_stop();
1760         on_poff_trigger.action->fn(&on_poff_trigger);
1761         stop_run(&on_poff_trigger);
1762 }
1763 void (*_machine_power_off)(void) = do_machine_power_off;
1764
1765 static void __init shutdown_triggers_init(void)
1766 {
1767         shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1768                                                     firmware_kobj);
1769         if (!shutdown_actions_kset)
1770                 goto fail;
1771         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1772                               &on_reboot_attr.attr))
1773                 goto fail;
1774         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1775                               &on_panic_attr.attr))
1776                 goto fail;
1777         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1778                               &on_halt_attr.attr))
1779                 goto fail;
1780         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1781                               &on_poff_attr.attr))
1782                 goto fail;
1783
1784         return;
1785 fail:
1786         panic("shutdown_triggers_init failed\n");
1787 }
1788
1789 static void __init shutdown_actions_init(void)
1790 {
1791         int i;
1792
1793         for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1794                 if (!shutdown_actions_list[i]->init)
1795                         continue;
1796                 shutdown_actions_list[i]->init_rc =
1797                         shutdown_actions_list[i]->init();
1798         }
1799 }
1800
1801 static int __init s390_ipl_init(void)
1802 {
1803         sclp_get_ipl_info(&sclp_ipl_info);
1804         shutdown_actions_init();
1805         shutdown_triggers_init();
1806         return 0;
1807 }
1808
1809 __initcall(s390_ipl_init);
1810
1811 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1812 {
1813         int sx, dx;
1814
1815         dx = 0;
1816         for (sx = 0; src[sx] != 0; sx++) {
1817                 if (src[sx] == '"')
1818                         continue;
1819                 dst[dx++] = src[sx];
1820                 if (dx >= n)
1821                         break;
1822         }
1823 }
1824
1825 static int __init vmcmd_on_reboot_setup(char *str)
1826 {
1827         if (!MACHINE_IS_VM)
1828                 return 1;
1829         strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1830         vmcmd_on_reboot[127] = 0;
1831         on_reboot_trigger.action = &vmcmd_action;
1832         return 1;
1833 }
1834 __setup("vmreboot=", vmcmd_on_reboot_setup);
1835
1836 static int __init vmcmd_on_panic_setup(char *str)
1837 {
1838         if (!MACHINE_IS_VM)
1839                 return 1;
1840         strncpy_skip_quote(vmcmd_on_panic, str, 127);
1841         vmcmd_on_panic[127] = 0;
1842         on_panic_trigger.action = &vmcmd_action;
1843         return 1;
1844 }
1845 __setup("vmpanic=", vmcmd_on_panic_setup);
1846
1847 static int __init vmcmd_on_halt_setup(char *str)
1848 {
1849         if (!MACHINE_IS_VM)
1850                 return 1;
1851         strncpy_skip_quote(vmcmd_on_halt, str, 127);
1852         vmcmd_on_halt[127] = 0;
1853         on_halt_trigger.action = &vmcmd_action;
1854         return 1;
1855 }
1856 __setup("vmhalt=", vmcmd_on_halt_setup);
1857
1858 static int __init vmcmd_on_poff_setup(char *str)
1859 {
1860         if (!MACHINE_IS_VM)
1861                 return 1;
1862         strncpy_skip_quote(vmcmd_on_poff, str, 127);
1863         vmcmd_on_poff[127] = 0;
1864         on_poff_trigger.action = &vmcmd_action;
1865         return 1;
1866 }
1867 __setup("vmpoff=", vmcmd_on_poff_setup);
1868
1869 static int on_panic_notify(struct notifier_block *self,
1870                            unsigned long event, void *data)
1871 {
1872         do_panic();
1873         return NOTIFY_OK;
1874 }
1875
1876 static struct notifier_block on_panic_nb = {
1877         .notifier_call = on_panic_notify,
1878         .priority = INT_MIN,
1879 };
1880
1881 void __init setup_ipl(void)
1882 {
1883         ipl_info.type = get_ipl_type();
1884         switch (ipl_info.type) {
1885         case IPL_TYPE_CCW:
1886                 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1887                 ipl_info.data.ccw.dev_id.ssid = 0;
1888                 break;
1889         case IPL_TYPE_FCP:
1890         case IPL_TYPE_FCP_DUMP:
1891                 ipl_info.data.fcp.dev_id.devno =
1892                         IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1893                 ipl_info.data.fcp.dev_id.ssid = 0;
1894                 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1895                 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1896                 break;
1897         case IPL_TYPE_NSS:
1898                 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1899                         sizeof(ipl_info.data.nss.name));
1900                 break;
1901         case IPL_TYPE_UNKNOWN:
1902                 /* We have no info to copy */
1903                 break;
1904         }
1905         atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1906 }
1907
1908 void __init ipl_update_parameters(void)
1909 {
1910         int rc;
1911
1912         rc = diag308(DIAG308_STORE, &ipl_block);
1913         if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
1914                 diag308_set_works = 1;
1915 }
1916
1917 void __init ipl_save_parameters(void)
1918 {
1919         struct cio_iplinfo iplinfo;
1920         void *src, *dst;
1921
1922         if (cio_get_iplinfo(&iplinfo))
1923                 return;
1924
1925         ipl_devno = iplinfo.devno;
1926         ipl_flags |= IPL_DEVNO_VALID;
1927         if (!iplinfo.is_qdio)
1928                 return;
1929         ipl_flags |= IPL_PARMBLOCK_VALID;
1930         src = (void *)(unsigned long)S390_lowcore.ipl_parmblock_ptr;
1931         dst = (void *)IPL_PARMBLOCK_ORIGIN;
1932         memmove(dst, src, PAGE_SIZE);
1933         S390_lowcore.ipl_parmblock_ptr = IPL_PARMBLOCK_ORIGIN;
1934 }
1935
1936 static LIST_HEAD(rcall);
1937 static DEFINE_MUTEX(rcall_mutex);
1938
1939 void register_reset_call(struct reset_call *reset)
1940 {
1941         mutex_lock(&rcall_mutex);
1942         list_add(&reset->list, &rcall);
1943         mutex_unlock(&rcall_mutex);
1944 }
1945 EXPORT_SYMBOL_GPL(register_reset_call);
1946
1947 void unregister_reset_call(struct reset_call *reset)
1948 {
1949         mutex_lock(&rcall_mutex);
1950         list_del(&reset->list);
1951         mutex_unlock(&rcall_mutex);
1952 }
1953 EXPORT_SYMBOL_GPL(unregister_reset_call);
1954
1955 static void do_reset_calls(void)
1956 {
1957         struct reset_call *reset;
1958
1959         list_for_each_entry(reset, &rcall, list)
1960                 reset->fn();
1961 }
1962
1963 u32 dump_prefix_page;
1964
1965 void s390_reset_system(void)
1966 {
1967         struct _lowcore *lc;
1968
1969         lc = (struct _lowcore *)(unsigned long) store_prefix();
1970
1971         /* Stack for interrupt/machine check handler */
1972         lc->panic_stack = S390_lowcore.panic_stack;
1973
1974         /* Save prefix page address for dump case */
1975         dump_prefix_page = (u32)(unsigned long) lc;
1976
1977         /* Disable prefixing */
1978         set_prefix(0);
1979
1980         /* Disable lowcore protection */
1981         __ctl_clear_bit(0,28);
1982
1983         /* Set new machine check handler */
1984         S390_lowcore.mcck_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
1985         S390_lowcore.mcck_new_psw.addr =
1986                 PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;
1987
1988         /* Set new program check handler */
1989         S390_lowcore.program_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
1990         S390_lowcore.program_new_psw.addr =
1991                 PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
1992
1993         do_reset_calls();
1994 }
1995