arch/s390/kernel/ipl.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *    ipl/reipl/dump support for Linux on s390.
   4  *
   5  *    Copyright IBM Corp. 2005, 2012
   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/export.h>
  13 #include <linux/init.h>
  14 #include <linux/device.h>
  15 #include <linux/delay.h>
  16 #include <linux/reboot.h>
  17 #include <linux/ctype.h>
  18 #include <linux/fs.h>
  19 #include <linux/gfp.h>
  20 #include <linux/crash_dump.h>
  21 #include <linux/debug_locks.h>
  22 #include <asm/diag.h>
  23 #include <asm/ipl.h>
  24 #include <asm/smp.h>
  25 #include <asm/setup.h>
  26 #include <asm/cpcmd.h>
  27 #include <asm/ebcdic.h>
  28 #include <asm/sclp.h>
  29 #include <asm/checksum.h>
  30 #include <asm/debug.h>
  31 #include <asm/os_info.h>
  32 #include "entry.h"
  33
  34 #define IPL_PARM_BLOCK_VERSION 0
  35
  36 #define IPL_UNKNOWN_STR         "unknown"
  37 #define IPL_CCW_STR             "ccw"
  38 #define IPL_FCP_STR             "fcp"
  39 #define IPL_FCP_DUMP_STR        "fcp_dump"
  40 #define IPL_NSS_STR             "nss"
  41
  42 #define DUMP_CCW_STR            "ccw"
  43 #define DUMP_FCP_STR            "fcp"
  44 #define DUMP_NONE_STR           "none"
  45
  46 /*
  47  * Four shutdown trigger types are supported:
  48  * - panic
  49  * - halt
  50  * - power off
  51  * - reipl
  52  * - restart
  53  */
  54 #define ON_PANIC_STR            "on_panic"
  55 #define ON_HALT_STR             "on_halt"
  56 #define ON_POFF_STR             "on_poff"
  57 #define ON_REIPL_STR            "on_reboot"
  58 #define ON_RESTART_STR          "on_restart"
  59
  60 struct shutdown_action;
  61 struct shutdown_trigger {
  62         char *name;
  63         struct shutdown_action *action;
  64 };
  65
  66 /*
  67  * The following shutdown action types are supported:
  68  */
  69 #define SHUTDOWN_ACTION_IPL_STR         "ipl"
  70 #define SHUTDOWN_ACTION_REIPL_STR       "reipl"
  71 #define SHUTDOWN_ACTION_DUMP_STR        "dump"
  72 #define SHUTDOWN_ACTION_VMCMD_STR       "vmcmd"
  73 #define SHUTDOWN_ACTION_STOP_STR        "stop"
  74 #define SHUTDOWN_ACTION_DUMP_REIPL_STR  "dump_reipl"
  75
  76 struct shutdown_action {
  77         char *name;
  78         void (*fn) (struct shutdown_trigger *trigger);
  79         int (*init) (void);
  80         int init_rc;
  81 };
  82
  83 static char *ipl_type_str(enum ipl_type type)
  84 {
  85         switch (type) {
  86         case IPL_TYPE_CCW:
  87                 return IPL_CCW_STR;
  88         case IPL_TYPE_FCP:
  89                 return IPL_FCP_STR;
  90         case IPL_TYPE_FCP_DUMP:
  91                 return IPL_FCP_DUMP_STR;
  92         case IPL_TYPE_NSS:
  93                 return IPL_NSS_STR;
  94         case IPL_TYPE_UNKNOWN:
  95         default:
  96                 return IPL_UNKNOWN_STR;
  97         }
  98 }
  99
 100 enum dump_type {
 101         DUMP_TYPE_NONE  = 1,
 102         DUMP_TYPE_CCW   = 2,
 103         DUMP_TYPE_FCP   = 4,
 104 };
 105
 106 static char *dump_type_str(enum dump_type type)
 107 {
 108         switch (type) {
 109         case DUMP_TYPE_NONE:
 110                 return DUMP_NONE_STR;
 111         case DUMP_TYPE_CCW:
 112                 return DUMP_CCW_STR;
 113         case DUMP_TYPE_FCP:
 114                 return DUMP_FCP_STR;
 115         default:
 116                 return NULL;
 117         }
 118 }
 119
 120 static int ipl_block_valid;
 121 static struct ipl_parameter_block ipl_block;
 122
 123 static int reipl_capabilities = IPL_TYPE_UNKNOWN;
 124
 125 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
 126 static struct ipl_parameter_block *reipl_block_fcp;
 127 static struct ipl_parameter_block *reipl_block_ccw;
 128 static struct ipl_parameter_block *reipl_block_nss;
 129 static struct ipl_parameter_block *reipl_block_actual;
 130
 131 static int dump_capabilities = DUMP_TYPE_NONE;
 132 static enum dump_type dump_type = DUMP_TYPE_NONE;
 133 static struct ipl_parameter_block *dump_block_fcp;
 134 static struct ipl_parameter_block *dump_block_ccw;
 135
 136 static struct sclp_ipl_info sclp_ipl_info;
 137
 138 static inline int __diag308(unsigned long subcode, void *addr)
 139 {
 140         register unsigned long _addr asm("0") = (unsigned long) addr;
 141         register unsigned long _rc asm("1") = 0;
 142
 143         asm volatile(
 144                 "       diag    %0,%2,0x308\n"
 145                 "0:     nopr    %%r7\n"
 146                 EX_TABLE(0b,0b)
 147                 : "+d" (_addr), "+d" (_rc)
 148                 : "d" (subcode) : "cc", "memory");
 149         return _rc;
 150 }
 151
 152 int diag308(unsigned long subcode, void *addr)
 153 {
 154         diag_stat_inc(DIAG_STAT_X308);
 155         return __diag308(subcode, addr);
 156 }
 157 EXPORT_SYMBOL_GPL(diag308);
 158
 159 /* SYSFS */
 160
 161 #define IPL_ATTR_SHOW_FN(_prefix, _name, _format, args...)              \
 162 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,     \
 163                 struct kobj_attribute *attr,                            \
 164                 char *page)                                             \
 165 {                                                                       \
 166         return snprintf(page, PAGE_SIZE, _format, ##args);              \
 167 }
 168
 169 #define IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk)                 \
 170 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,    \
 171                 struct kobj_attribute *attr,                            \
 172                 const char *buf, size_t len)                            \
 173 {                                                                       \
 174         unsigned long long ssid, devno;                                 \
 175                                                                         \
 176         if (sscanf(buf, "0.%llx.%llx\n", &ssid, &devno) != 2)           \
 177                 return -EINVAL;                                         \
 178                                                                         \
 179         if (ssid > __MAX_SSID || devno > __MAX_SUBCHANNEL)              \
 180                 return -EINVAL;                                         \
 181                                                                         \
 182         _ipl_blk.ssid = ssid;                                           \
 183         _ipl_blk.devno = devno;                                         \
 184         return len;                                                     \
 185 }
 186
 187 #define DEFINE_IPL_CCW_ATTR_RW(_prefix, _name, _ipl_blk)                \
 188 IPL_ATTR_SHOW_FN(_prefix, _name, "0.%x.%04x\n",                         \
 189                  _ipl_blk.ssid, _ipl_blk.devno);                        \
 190 IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk);                        \
 191 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 192         __ATTR(_name, (S_IRUGO | S_IWUSR),                              \
 193                sys_##_prefix##_##_name##_show,                          \
 194                sys_##_prefix##_##_name##_store)                         \
 195
 196 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value)             \
 197 IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value)                       \
 198 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 199         __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL)
 200
 201 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)   \
 202 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value) \
 203 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,    \
 204                 struct kobj_attribute *attr,                            \
 205                 const char *buf, size_t len)                            \
 206 {                                                                       \
 207         unsigned long long value;                                       \
 208         if (sscanf(buf, _fmt_in, &value) != 1)                          \
 209                 return -EINVAL;                                         \
 210         _value = value;                                                 \
 211         return len;                                                     \
 212 }                                                                       \
 213 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 214         __ATTR(_name,(S_IRUGO | S_IWUSR),                               \
 215                         sys_##_prefix##_##_name##_show,                 \
 216                         sys_##_prefix##_##_name##_store)
 217
 218 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
 219 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, _value)                      \
 220 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,    \
 221                 struct kobj_attribute *attr,                            \
 222                 const char *buf, size_t len)                            \
 223 {                                                                       \
 224         strncpy(_value, buf, sizeof(_value) - 1);                       \
 225         strim(_value);                                                  \
 226         return len;                                                     \
 227 }                                                                       \
 228 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 229         __ATTR(_name,(S_IRUGO | S_IWUSR),                               \
 230                         sys_##_prefix##_##_name##_show,                 \
 231                         sys_##_prefix##_##_name##_store)
 232
 233 /*
 234  * ipl section
 235  */
 236
 237 static __init enum ipl_type get_ipl_type(void)
 238 {
 239         if (!ipl_block_valid)
 240                 return IPL_TYPE_UNKNOWN;
 241
 242         switch (ipl_block.hdr.pbt) {
 243         case DIAG308_IPL_TYPE_CCW:
 244                 return IPL_TYPE_CCW;
 245         case DIAG308_IPL_TYPE_FCP:
 246                 if (ipl_block.ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
 247                         return IPL_TYPE_FCP_DUMP;
 248                 else
 249                         return IPL_TYPE_FCP;
 250         }
 251         return IPL_TYPE_UNKNOWN;
 252 }
 253
 254 struct ipl_info ipl_info;
 255 EXPORT_SYMBOL_GPL(ipl_info);
 256
 257 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
 258                              char *page)
 259 {
 260         return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
 261 }
 262
 263 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
 264
 265 /* VM IPL PARM routines */
 266 static size_t reipl_get_ascii_vmparm(char *dest, size_t size,
 267                                      const struct ipl_parameter_block *ipb)
 268 {
 269         int i;
 270         size_t len;
 271         char has_lowercase = 0;
 272
 273         len = 0;
 274         if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
 275             (ipb->ipl_info.ccw.vm_parm_len > 0)) {
 276
 277                 len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
 278                 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
 279                 /* If at least one character is lowercase, we assume mixed
 280                  * case; otherwise we convert everything to lowercase.
 281                  */
 282                 for (i = 0; i < len; i++)
 283                         if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
 284                             (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
 285                             (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
 286                                 has_lowercase = 1;
 287                                 break;
 288                         }
 289                 if (!has_lowercase)
 290                         EBC_TOLOWER(dest, len);
 291                 EBCASC(dest, len);
 292         }
 293         dest[len] = 0;
 294
 295         return len;
 296 }
 297
 298 size_t append_ipl_vmparm(char *dest, size_t size)
 299 {
 300         size_t rc;
 301
 302         rc = 0;
 303         if (ipl_block_valid && ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW)
 304                 rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
 305         else
 306                 dest[0] = 0;
 307         return rc;
 308 }
 309
 310 static ssize_t ipl_vm_parm_show(struct kobject *kobj,
 311                                 struct kobj_attribute *attr, char *page)
 312 {
 313         char parm[DIAG308_VMPARM_SIZE + 1] = {};
 314
 315         append_ipl_vmparm(parm, sizeof(parm));
 316         return sprintf(page, "%s\n", parm);
 317 }
 318
 319 static size_t scpdata_length(const char* buf, size_t count)
 320 {
 321         while (count) {
 322                 if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
 323                         break;
 324                 count--;
 325         }
 326         return count;
 327 }
 328
 329 static size_t reipl_append_ascii_scpdata(char *dest, size_t size,
 330                                          const struct ipl_parameter_block *ipb)
 331 {
 332         size_t count;
 333         size_t i;
 334         int has_lowercase;
 335
 336         count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data,
 337                                              ipb->ipl_info.fcp.scp_data_len));
 338         if (!count)
 339                 goto out;
 340
 341         has_lowercase = 0;
 342         for (i = 0; i < count; i++) {
 343                 if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
 344                         count = 0;
 345                         goto out;
 346                 }
 347                 if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
 348                         has_lowercase = 1;
 349         }
 350
 351         if (has_lowercase)
 352                 memcpy(dest, ipb->ipl_info.fcp.scp_data, count);
 353         else
 354                 for (i = 0; i < count; i++)
 355                         dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]);
 356 out:
 357         dest[count] = '\0';
 358         return count;
 359 }
 360
 361 size_t append_ipl_scpdata(char *dest, size_t len)
 362 {
 363         size_t rc;
 364
 365         rc = 0;
 366         if (ipl_block_valid && ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP)
 367                 rc = reipl_append_ascii_scpdata(dest, len, &ipl_block);
 368         else
 369                 dest[0] = 0;
 370         return rc;
 371 }
 372
 373
 374 static struct kobj_attribute sys_ipl_vm_parm_attr =
 375         __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
 376
 377 static ssize_t sys_ipl_device_show(struct kobject *kobj,
 378                                    struct kobj_attribute *attr, char *page)
 379 {
 380         switch (ipl_info.type) {
 381         case IPL_TYPE_CCW:
 382                 return sprintf(page, "0.%x.%04x\n", ipl_block.ipl_info.ccw.ssid,
 383                                ipl_block.ipl_info.ccw.devno);
 384         case IPL_TYPE_FCP:
 385         case IPL_TYPE_FCP_DUMP:
 386                 return sprintf(page, "0.0.%04x\n",
 387                                ipl_block.ipl_info.fcp.devno);
 388         default:
 389                 return 0;
 390         }
 391 }
 392
 393 static struct kobj_attribute sys_ipl_device_attr =
 394         __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
 395
 396 static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
 397                                   struct bin_attribute *attr, char *buf,
 398                                   loff_t off, size_t count)
 399 {
 400         return memory_read_from_buffer(buf, count, &off, &ipl_block,
 401                                        ipl_block.hdr.len);
 402 }
 403 static struct bin_attribute ipl_parameter_attr =
 404         __BIN_ATTR(binary_parameter, S_IRUGO, ipl_parameter_read, NULL,
 405                    PAGE_SIZE);
 406
 407 static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
 408                                  struct bin_attribute *attr, char *buf,
 409                                  loff_t off, size_t count)
 410 {
 411         unsigned int size = ipl_block.ipl_info.fcp.scp_data_len;
 412         void *scp_data = &ipl_block.ipl_info.fcp.scp_data;
 413
 414         return memory_read_from_buffer(buf, count, &off, scp_data, size);
 415 }
 416 static struct bin_attribute ipl_scp_data_attr =
 417         __BIN_ATTR(scp_data, S_IRUGO, ipl_scp_data_read, NULL, PAGE_SIZE);
 418
 419 static struct bin_attribute *ipl_fcp_bin_attrs[] = {
 420         &ipl_parameter_attr,
 421         &ipl_scp_data_attr,
 422         NULL,
 423 };
 424
 425 /* FCP ipl device attributes */
 426
 427 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n",
 428                    (unsigned long long)ipl_block.ipl_info.fcp.wwpn);
 429 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n",
 430                    (unsigned long long)ipl_block.ipl_info.fcp.lun);
 431 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n",
 432                    (unsigned long long)ipl_block.ipl_info.fcp.bootprog);
 433 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n",
 434                    (unsigned long long)ipl_block.ipl_info.fcp.br_lba);
 435
 436 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
 437                                      struct kobj_attribute *attr, char *page)
 438 {
 439         char loadparm[LOADPARM_LEN + 1] = {};
 440
 441         if (!sclp_ipl_info.is_valid)
 442                 return sprintf(page, "#unknown#\n");
 443         memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
 444         EBCASC(loadparm, LOADPARM_LEN);
 445         strim(loadparm);
 446         return sprintf(page, "%s\n", loadparm);
 447 }
 448
 449 static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
 450         __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
 451
 452 static struct attribute *ipl_fcp_attrs[] = {
 453         &sys_ipl_type_attr.attr,
 454         &sys_ipl_device_attr.attr,
 455         &sys_ipl_fcp_wwpn_attr.attr,
 456         &sys_ipl_fcp_lun_attr.attr,
 457         &sys_ipl_fcp_bootprog_attr.attr,
 458         &sys_ipl_fcp_br_lba_attr.attr,
 459         &sys_ipl_ccw_loadparm_attr.attr,
 460         NULL,
 461 };
 462
 463 static struct attribute_group ipl_fcp_attr_group = {
 464         .attrs = ipl_fcp_attrs,
 465         .bin_attrs = ipl_fcp_bin_attrs,
 466 };
 467
 468 /* CCW ipl device attributes */
 469
 470 static struct attribute *ipl_ccw_attrs_vm[] = {
 471         &sys_ipl_type_attr.attr,
 472         &sys_ipl_device_attr.attr,
 473         &sys_ipl_ccw_loadparm_attr.attr,
 474         &sys_ipl_vm_parm_attr.attr,
 475         NULL,
 476 };
 477
 478 static struct attribute *ipl_ccw_attrs_lpar[] = {
 479         &sys_ipl_type_attr.attr,
 480         &sys_ipl_device_attr.attr,
 481         &sys_ipl_ccw_loadparm_attr.attr,
 482         NULL,
 483 };
 484
 485 static struct attribute_group ipl_ccw_attr_group_vm = {
 486         .attrs = ipl_ccw_attrs_vm,
 487 };
 488
 489 static struct attribute_group ipl_ccw_attr_group_lpar = {
 490         .attrs = ipl_ccw_attrs_lpar
 491 };
 492
 493 /* UNKNOWN ipl device attributes */
 494
 495 static struct attribute *ipl_unknown_attrs[] = {
 496         &sys_ipl_type_attr.attr,
 497         NULL,
 498 };
 499
 500 static struct attribute_group ipl_unknown_attr_group = {
 501         .attrs = ipl_unknown_attrs,
 502 };
 503
 504 static struct kset *ipl_kset;
 505
 506 static void __ipl_run(void *unused)
 507 {
 508         __bpon();
 509         diag308(DIAG308_LOAD_CLEAR, NULL);
 510 }
 511
 512 static void ipl_run(struct shutdown_trigger *trigger)
 513 {
 514         smp_call_ipl_cpu(__ipl_run, NULL);
 515 }
 516
 517 static int __init ipl_init(void)
 518 {
 519         int rc;
 520
 521         ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
 522         if (!ipl_kset) {
 523                 rc = -ENOMEM;
 524                 goto out;
 525         }
 526         switch (ipl_info.type) {
 527         case IPL_TYPE_CCW:
 528                 if (MACHINE_IS_VM)
 529                         rc = sysfs_create_group(&ipl_kset->kobj,
 530                                                 &ipl_ccw_attr_group_vm);
 531                 else
 532                         rc = sysfs_create_group(&ipl_kset->kobj,
 533                                                 &ipl_ccw_attr_group_lpar);
 534                 break;
 535         case IPL_TYPE_FCP:
 536         case IPL_TYPE_FCP_DUMP:
 537                 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
 538                 break;
 539         default:
 540                 rc = sysfs_create_group(&ipl_kset->kobj,
 541                                         &ipl_unknown_attr_group);
 542                 break;
 543         }
 544 out:
 545         if (rc)
 546                 panic("ipl_init failed: rc = %i\n", rc);
 547
 548         return 0;
 549 }
 550
 551 static struct shutdown_action __refdata ipl_action = {
 552         .name   = SHUTDOWN_ACTION_IPL_STR,
 553         .fn     = ipl_run,
 554         .init   = ipl_init,
 555 };
 556
 557 /*
 558  * reipl shutdown action: Reboot Linux on shutdown.
 559  */
 560
 561 /* VM IPL PARM attributes */
 562 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
 563                                           char *page)
 564 {
 565         char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
 566
 567         reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
 568         return sprintf(page, "%s\n", vmparm);
 569 }
 570
 571 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
 572                                           size_t vmparm_max,
 573                                           const char *buf, size_t len)
 574 {
 575         int i, ip_len;
 576
 577         /* ignore trailing newline */
 578         ip_len = len;
 579         if ((len > 0) && (buf[len - 1] == '\n'))
 580                 ip_len--;
 581
 582         if (ip_len > vmparm_max)
 583                 return -EINVAL;
 584
 585         /* parm is used to store kernel options, check for common chars */
 586         for (i = 0; i < ip_len; i++)
 587                 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
 588                         return -EINVAL;
 589
 590         memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
 591         ipb->ipl_info.ccw.vm_parm_len = ip_len;
 592         if (ip_len > 0) {
 593                 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
 594                 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
 595                 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
 596         } else {
 597                 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
 598         }
 599
 600         return len;
 601 }
 602
 603 /* NSS wrapper */
 604 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
 605                                      struct kobj_attribute *attr, char *page)
 606 {
 607         return reipl_generic_vmparm_show(reipl_block_nss, page);
 608 }
 609
 610 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
 611                                       struct kobj_attribute *attr,
 612                                       const char *buf, size_t len)
 613 {
 614         return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
 615 }
 616
 617 /* CCW wrapper */
 618 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
 619                                      struct kobj_attribute *attr, char *page)
 620 {
 621         return reipl_generic_vmparm_show(reipl_block_ccw, page);
 622 }
 623
 624 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
 625                                       struct kobj_attribute *attr,
 626                                       const char *buf, size_t len)
 627 {
 628         return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
 629 }
 630
 631 static struct kobj_attribute sys_reipl_nss_vmparm_attr =
 632         __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
 633                                         reipl_nss_vmparm_store);
 634 static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
 635         __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
 636                                         reipl_ccw_vmparm_store);
 637
 638 /* FCP reipl device attributes */
 639
 640 static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
 641                                       struct bin_attribute *attr,
 642                                       char *buf, loff_t off, size_t count)
 643 {
 644         size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
 645         void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
 646
 647         return memory_read_from_buffer(buf, count, &off, scp_data, size);
 648 }
 649
 650 static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
 651                                        struct bin_attribute *attr,
 652                                        char *buf, loff_t off, size_t count)
 653 {
 654         size_t scpdata_len = count;
 655         size_t padding;
 656
 657
 658         if (off)
 659                 return -EINVAL;
 660
 661         memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf, count);
 662         if (scpdata_len % 8) {
 663                 padding = 8 - (scpdata_len % 8);
 664                 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
 665                        0, padding);
 666                 scpdata_len += padding;
 667         }
 668
 669         reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
 670         reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
 671         reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
 672
 673         return count;
 674 }
 675 static struct bin_attribute sys_reipl_fcp_scp_data_attr =
 676         __BIN_ATTR(scp_data, (S_IRUGO | S_IWUSR), reipl_fcp_scpdata_read,
 677                    reipl_fcp_scpdata_write, DIAG308_SCPDATA_SIZE);
 678
 679 static struct bin_attribute *reipl_fcp_bin_attrs[] = {
 680         &sys_reipl_fcp_scp_data_attr,
 681         NULL,
 682 };
 683
 684 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n",
 685                    reipl_block_fcp->ipl_info.fcp.wwpn);
 686 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n",
 687                    reipl_block_fcp->ipl_info.fcp.lun);
 688 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
 689                    reipl_block_fcp->ipl_info.fcp.bootprog);
 690 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
 691                    reipl_block_fcp->ipl_info.fcp.br_lba);
 692 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
 693                    reipl_block_fcp->ipl_info.fcp.devno);
 694
 695 static void reipl_get_ascii_loadparm(char *loadparm,
 696                                      struct ipl_parameter_block *ibp)
 697 {
 698         memcpy(loadparm, ibp->hdr.loadparm, LOADPARM_LEN);
 699         EBCASC(loadparm, LOADPARM_LEN);
 700         loadparm[LOADPARM_LEN] = 0;
 701         strim(loadparm);
 702 }
 703
 704 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
 705                                            char *page)
 706 {
 707         char buf[LOADPARM_LEN + 1];
 708
 709         reipl_get_ascii_loadparm(buf, ipb);
 710         return sprintf(page, "%s\n", buf);
 711 }
 712
 713 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
 714                                             const char *buf, size_t len)
 715 {
 716         int i, lp_len;
 717
 718         /* ignore trailing newline */
 719         lp_len = len;
 720         if ((len > 0) && (buf[len - 1] == '\n'))
 721                 lp_len--;
 722         /* loadparm can have max 8 characters and must not start with a blank */
 723         if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
 724                 return -EINVAL;
 725         /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
 726         for (i = 0; i < lp_len; i++) {
 727                 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
 728                     (buf[i] == '.'))
 729                         continue;
 730                 return -EINVAL;
 731         }
 732         /* initialize loadparm with blanks */
 733         memset(ipb->hdr.loadparm, ' ', LOADPARM_LEN);
 734         /* copy and convert to ebcdic */
 735         memcpy(ipb->hdr.loadparm, buf, lp_len);
 736         ASCEBC(ipb->hdr.loadparm, LOADPARM_LEN);
 737         ipb->hdr.flags |= DIAG308_FLAGS_LP_VALID;
 738         return len;
 739 }
 740
 741 /* FCP wrapper */
 742 static ssize_t reipl_fcp_loadparm_show(struct kobject *kobj,
 743                                        struct kobj_attribute *attr, char *page)
 744 {
 745         return reipl_generic_loadparm_show(reipl_block_fcp, page);
 746 }
 747
 748 static ssize_t reipl_fcp_loadparm_store(struct kobject *kobj,
 749                                         struct kobj_attribute *attr,
 750                                         const char *buf, size_t len)
 751 {
 752         return reipl_generic_loadparm_store(reipl_block_fcp, buf, len);
 753 }
 754
 755 static struct kobj_attribute sys_reipl_fcp_loadparm_attr =
 756         __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_fcp_loadparm_show,
 757                                             reipl_fcp_loadparm_store);
 758
 759 static struct attribute *reipl_fcp_attrs[] = {
 760         &sys_reipl_fcp_device_attr.attr,
 761         &sys_reipl_fcp_wwpn_attr.attr,
 762         &sys_reipl_fcp_lun_attr.attr,
 763         &sys_reipl_fcp_bootprog_attr.attr,
 764         &sys_reipl_fcp_br_lba_attr.attr,
 765         &sys_reipl_fcp_loadparm_attr.attr,
 766         NULL,
 767 };
 768
 769 static struct attribute_group reipl_fcp_attr_group = {
 770         .attrs = reipl_fcp_attrs,
 771         .bin_attrs = reipl_fcp_bin_attrs,
 772 };
 773
 774 /* CCW reipl device attributes */
 775 DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ipl_info.ccw);
 776
 777 /* NSS wrapper */
 778 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
 779                                        struct kobj_attribute *attr, char *page)
 780 {
 781         return reipl_generic_loadparm_show(reipl_block_nss, page);
 782 }
 783
 784 static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
 785                                         struct kobj_attribute *attr,
 786                                         const char *buf, size_t len)
 787 {
 788         return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
 789 }
 790
 791 /* CCW wrapper */
 792 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
 793                                        struct kobj_attribute *attr, char *page)
 794 {
 795         return reipl_generic_loadparm_show(reipl_block_ccw, page);
 796 }
 797
 798 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
 799                                         struct kobj_attribute *attr,
 800                                         const char *buf, size_t len)
 801 {
 802         return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
 803 }
 804
 805 static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
 806         __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
 807                                             reipl_ccw_loadparm_store);
 808
 809 static struct attribute *reipl_ccw_attrs_vm[] = {
 810         &sys_reipl_ccw_device_attr.attr,
 811         &sys_reipl_ccw_loadparm_attr.attr,
 812         &sys_reipl_ccw_vmparm_attr.attr,
 813         NULL,
 814 };
 815
 816 static struct attribute *reipl_ccw_attrs_lpar[] = {
 817         &sys_reipl_ccw_device_attr.attr,
 818         &sys_reipl_ccw_loadparm_attr.attr,
 819         NULL,
 820 };
 821
 822 static struct attribute_group reipl_ccw_attr_group_vm = {
 823         .name  = IPL_CCW_STR,
 824         .attrs = reipl_ccw_attrs_vm,
 825 };
 826
 827 static struct attribute_group reipl_ccw_attr_group_lpar = {
 828         .name  = IPL_CCW_STR,
 829         .attrs = reipl_ccw_attrs_lpar,
 830 };
 831
 832
 833 /* NSS reipl device attributes */
 834 static void reipl_get_ascii_nss_name(char *dst,
 835                                      struct ipl_parameter_block *ipb)
 836 {
 837         memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
 838         EBCASC(dst, NSS_NAME_SIZE);
 839         dst[NSS_NAME_SIZE] = 0;
 840 }
 841
 842 static ssize_t reipl_nss_name_show(struct kobject *kobj,
 843                                    struct kobj_attribute *attr, char *page)
 844 {
 845         char nss_name[NSS_NAME_SIZE + 1] = {};
 846
 847         reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
 848         return sprintf(page, "%s\n", nss_name);
 849 }
 850
 851 static ssize_t reipl_nss_name_store(struct kobject *kobj,
 852                                     struct kobj_attribute *attr,
 853                                     const char *buf, size_t len)
 854 {
 855         int nss_len;
 856
 857         /* ignore trailing newline */
 858         nss_len = len;
 859         if ((len > 0) && (buf[len - 1] == '\n'))
 860                 nss_len--;
 861
 862         if (nss_len > NSS_NAME_SIZE)
 863                 return -EINVAL;
 864
 865         memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
 866         if (nss_len > 0) {
 867                 reipl_block_nss->ipl_info.ccw.vm_flags |=
 868                         DIAG308_VM_FLAGS_NSS_VALID;
 869                 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
 870                 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
 871                 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
 872         } else {
 873                 reipl_block_nss->ipl_info.ccw.vm_flags &=
 874                         ~DIAG308_VM_FLAGS_NSS_VALID;
 875         }
 876
 877         return len;
 878 }
 879
 880 static struct kobj_attribute sys_reipl_nss_name_attr =
 881         __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
 882                                         reipl_nss_name_store);
 883
 884 static struct kobj_attribute sys_reipl_nss_loadparm_attr =
 885         __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
 886                                             reipl_nss_loadparm_store);
 887
 888 static struct attribute *reipl_nss_attrs[] = {
 889         &sys_reipl_nss_name_attr.attr,
 890         &sys_reipl_nss_loadparm_attr.attr,
 891         &sys_reipl_nss_vmparm_attr.attr,
 892         NULL,
 893 };
 894
 895 static struct attribute_group reipl_nss_attr_group = {
 896         .name  = IPL_NSS_STR,
 897         .attrs = reipl_nss_attrs,
 898 };
 899
 900 void set_os_info_reipl_block(void)
 901 {
 902         os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual,
 903                           reipl_block_actual->hdr.len);
 904 }
 905
 906 /* reipl type */
 907
 908 static int reipl_set_type(enum ipl_type type)
 909 {
 910         if (!(reipl_capabilities & type))
 911                 return -EINVAL;
 912
 913         switch(type) {
 914         case IPL_TYPE_CCW:
 915                 reipl_block_actual = reipl_block_ccw;
 916                 break;
 917         case IPL_TYPE_FCP:
 918                 reipl_block_actual = reipl_block_fcp;
 919                 break;
 920         case IPL_TYPE_NSS:
 921                 reipl_block_actual = reipl_block_nss;
 922                 break;
 923         default:
 924                 break;
 925         }
 926         reipl_type = type;
 927         return 0;
 928 }
 929
 930 static ssize_t reipl_type_show(struct kobject *kobj,
 931                                struct kobj_attribute *attr, char *page)
 932 {
 933         return sprintf(page, "%s\n", ipl_type_str(reipl_type));
 934 }
 935
 936 static ssize_t reipl_type_store(struct kobject *kobj,
 937                                 struct kobj_attribute *attr,
 938                                 const char *buf, size_t len)
 939 {
 940         int rc = -EINVAL;
 941
 942         if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
 943                 rc = reipl_set_type(IPL_TYPE_CCW);
 944         else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
 945                 rc = reipl_set_type(IPL_TYPE_FCP);
 946         else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
 947                 rc = reipl_set_type(IPL_TYPE_NSS);
 948         return (rc != 0) ? rc : len;
 949 }
 950
 951 static struct kobj_attribute reipl_type_attr =
 952         __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
 953
 954 static struct kset *reipl_kset;
 955 static struct kset *reipl_fcp_kset;
 956
 957 static void __reipl_run(void *unused)
 958 {
 959         switch (reipl_type) {
 960         case IPL_TYPE_CCW:
 961                 diag308(DIAG308_SET, reipl_block_ccw);
 962                 diag308(DIAG308_LOAD_CLEAR, NULL);
 963                 break;
 964         case IPL_TYPE_FCP:
 965                 diag308(DIAG308_SET, reipl_block_fcp);
 966                 diag308(DIAG308_LOAD_CLEAR, NULL);
 967                 break;
 968         case IPL_TYPE_NSS:
 969                 diag308(DIAG308_SET, reipl_block_nss);
 970                 diag308(DIAG308_LOAD_CLEAR, NULL);
 971                 break;
 972         case IPL_TYPE_UNKNOWN:
 973                 diag308(DIAG308_LOAD_CLEAR, NULL);
 974                 break;
 975         case IPL_TYPE_FCP_DUMP:
 976                 break;
 977         }
 978         disabled_wait((unsigned long) __builtin_return_address(0));
 979 }
 980
 981 static void reipl_run(struct shutdown_trigger *trigger)
 982 {
 983         smp_call_ipl_cpu(__reipl_run, NULL);
 984 }
 985
 986 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
 987 {
 988         ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
 989         ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
 990         ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
 991         ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
 992 }
 993
 994 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
 995 {
 996         /* LOADPARM */
 997         /* check if read scp info worked and set loadparm */
 998         if (sclp_ipl_info.is_valid)
 999                 memcpy(ipb->hdr.loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
1000         else
1001                 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1002                 memset(ipb->hdr.loadparm, 0x40, LOADPARM_LEN);
1003         ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
1004
1005         /* VM PARM */
1006         if (MACHINE_IS_VM && ipl_block_valid &&
1007             (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1008
1009                 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1010                 ipb->ipl_info.ccw.vm_parm_len =
1011                                         ipl_block.ipl_info.ccw.vm_parm_len;
1012                 memcpy(ipb->ipl_info.ccw.vm_parm,
1013                        ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1014         }
1015 }
1016
1017 static int __init reipl_nss_init(void)
1018 {
1019         int rc;
1020
1021         if (!MACHINE_IS_VM)
1022                 return 0;
1023
1024         reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1025         if (!reipl_block_nss)
1026                 return -ENOMEM;
1027
1028         rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1029         if (rc)
1030                 return rc;
1031
1032         reipl_block_ccw_init(reipl_block_nss);
1033         reipl_capabilities |= IPL_TYPE_NSS;
1034         return 0;
1035 }
1036
1037 static int __init reipl_ccw_init(void)
1038 {
1039         int rc;
1040
1041         reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1042         if (!reipl_block_ccw)
1043                 return -ENOMEM;
1044
1045         rc = sysfs_create_group(&reipl_kset->kobj,
1046                                 MACHINE_IS_VM ? &reipl_ccw_attr_group_vm
1047                                               : &reipl_ccw_attr_group_lpar);
1048         if (rc)
1049                 return rc;
1050
1051         reipl_block_ccw_init(reipl_block_ccw);
1052         if (ipl_info.type == IPL_TYPE_CCW) {
1053                 reipl_block_ccw->ipl_info.ccw.ssid = ipl_block.ipl_info.ccw.ssid;
1054                 reipl_block_ccw->ipl_info.ccw.devno = ipl_block.ipl_info.ccw.devno;
1055                 reipl_block_ccw_fill_parms(reipl_block_ccw);
1056         }
1057
1058         reipl_capabilities |= IPL_TYPE_CCW;
1059         return 0;
1060 }
1061
1062 static int __init reipl_fcp_init(void)
1063 {
1064         int rc;
1065
1066         reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1067         if (!reipl_block_fcp)
1068                 return -ENOMEM;
1069
1070         /* sysfs: create fcp kset for mixing attr group and bin attrs */
1071         reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1072                                              &reipl_kset->kobj);
1073         if (!reipl_fcp_kset) {
1074                 free_page((unsigned long) reipl_block_fcp);
1075                 return -ENOMEM;
1076         }
1077
1078         rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1079         if (rc) {
1080                 kset_unregister(reipl_fcp_kset);
1081                 free_page((unsigned long) reipl_block_fcp);
1082                 return rc;
1083         }
1084
1085         if (ipl_info.type == IPL_TYPE_FCP) {
1086                 memcpy(reipl_block_fcp, &ipl_block, sizeof(ipl_block));
1087                 /*
1088                  * Fix loadparm: There are systems where the (SCSI) LOADPARM
1089                  * is invalid in the SCSI IPL parameter block, so take it
1090                  * always from sclp_ipl_info.
1091                  */
1092                 memcpy(reipl_block_fcp->hdr.loadparm, sclp_ipl_info.loadparm,
1093                        LOADPARM_LEN);
1094         } else {
1095                 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1096                 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1097                 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1098                 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1099                 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1100         }
1101         reipl_capabilities |= IPL_TYPE_FCP;
1102         return 0;
1103 }
1104
1105 static int __init reipl_type_init(void)
1106 {
1107         enum ipl_type reipl_type = ipl_info.type;
1108         struct ipl_parameter_block *reipl_block;
1109         unsigned long size;
1110
1111         reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size);
1112         if (!reipl_block)
1113                 goto out;
1114         /*
1115          * If we have an OS info reipl block, this will be used
1116          */
1117         if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_FCP) {
1118                 memcpy(reipl_block_fcp, reipl_block, size);
1119                 reipl_type = IPL_TYPE_FCP;
1120         } else if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_CCW) {
1121                 memcpy(reipl_block_ccw, reipl_block, size);
1122                 reipl_type = IPL_TYPE_CCW;
1123         }
1124 out:
1125         return reipl_set_type(reipl_type);
1126 }
1127
1128 static int __init reipl_init(void)
1129 {
1130         int rc;
1131
1132         reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1133         if (!reipl_kset)
1134                 return -ENOMEM;
1135         rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1136         if (rc) {
1137                 kset_unregister(reipl_kset);
1138                 return rc;
1139         }
1140         rc = reipl_ccw_init();
1141         if (rc)
1142                 return rc;
1143         rc = reipl_fcp_init();
1144         if (rc)
1145                 return rc;
1146         rc = reipl_nss_init();
1147         if (rc)
1148                 return rc;
1149         return reipl_type_init();
1150 }
1151
1152 static struct shutdown_action __refdata reipl_action = {
1153         .name   = SHUTDOWN_ACTION_REIPL_STR,
1154         .fn     = reipl_run,
1155         .init   = reipl_init,
1156 };
1157
1158 /*
1159  * dump shutdown action: Dump Linux on shutdown.
1160  */
1161
1162 /* FCP dump device attributes */
1163
1164 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n",
1165                    dump_block_fcp->ipl_info.fcp.wwpn);
1166 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n",
1167                    dump_block_fcp->ipl_info.fcp.lun);
1168 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1169                    dump_block_fcp->ipl_info.fcp.bootprog);
1170 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1171                    dump_block_fcp->ipl_info.fcp.br_lba);
1172 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1173                    dump_block_fcp->ipl_info.fcp.devno);
1174
1175 static struct attribute *dump_fcp_attrs[] = {
1176         &sys_dump_fcp_device_attr.attr,
1177         &sys_dump_fcp_wwpn_attr.attr,
1178         &sys_dump_fcp_lun_attr.attr,
1179         &sys_dump_fcp_bootprog_attr.attr,
1180         &sys_dump_fcp_br_lba_attr.attr,
1181         NULL,
1182 };
1183
1184 static struct attribute_group dump_fcp_attr_group = {
1185         .name  = IPL_FCP_STR,
1186         .attrs = dump_fcp_attrs,
1187 };
1188
1189 /* CCW dump device attributes */
1190 DEFINE_IPL_CCW_ATTR_RW(dump_ccw, device, dump_block_ccw->ipl_info.ccw);
1191
1192 static struct attribute *dump_ccw_attrs[] = {
1193         &sys_dump_ccw_device_attr.attr,
1194         NULL,
1195 };
1196
1197 static struct attribute_group dump_ccw_attr_group = {
1198         .name  = IPL_CCW_STR,
1199         .attrs = dump_ccw_attrs,
1200 };
1201
1202 /* dump type */
1203
1204 static int dump_set_type(enum dump_type type)
1205 {
1206         if (!(dump_capabilities & type))
1207                 return -EINVAL;
1208         dump_type = type;
1209         return 0;
1210 }
1211
1212 static ssize_t dump_type_show(struct kobject *kobj,
1213                               struct kobj_attribute *attr, char *page)
1214 {
1215         return sprintf(page, "%s\n", dump_type_str(dump_type));
1216 }
1217
1218 static ssize_t dump_type_store(struct kobject *kobj,
1219                                struct kobj_attribute *attr,
1220                                const char *buf, size_t len)
1221 {
1222         int rc = -EINVAL;
1223
1224         if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1225                 rc = dump_set_type(DUMP_TYPE_NONE);
1226         else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1227                 rc = dump_set_type(DUMP_TYPE_CCW);
1228         else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1229                 rc = dump_set_type(DUMP_TYPE_FCP);
1230         return (rc != 0) ? rc : len;
1231 }
1232
1233 static struct kobj_attribute dump_type_attr =
1234         __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1235
1236 static struct kset *dump_kset;
1237
1238 static void diag308_dump(void *dump_block)
1239 {
1240         diag308(DIAG308_SET, dump_block);
1241         while (1) {
1242                 if (diag308(DIAG308_LOAD_NORMAL_DUMP, NULL) != 0x302)
1243                         break;
1244                 udelay_simple(USEC_PER_SEC);
1245         }
1246 }
1247
1248 static void __dump_run(void *unused)
1249 {
1250         switch (dump_type) {
1251         case DUMP_TYPE_CCW:
1252                 diag308_dump(dump_block_ccw);
1253                 break;
1254         case DUMP_TYPE_FCP:
1255                 diag308_dump(dump_block_fcp);
1256                 break;
1257         default:
1258                 break;
1259         }
1260 }
1261
1262 static void dump_run(struct shutdown_trigger *trigger)
1263 {
1264         if (dump_type == DUMP_TYPE_NONE)
1265                 return;
1266         smp_send_stop();
1267         smp_call_ipl_cpu(__dump_run, NULL);
1268 }
1269
1270 static int __init dump_ccw_init(void)
1271 {
1272         int rc;
1273
1274         dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1275         if (!dump_block_ccw)
1276                 return -ENOMEM;
1277         rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1278         if (rc) {
1279                 free_page((unsigned long)dump_block_ccw);
1280                 return rc;
1281         }
1282         dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1283         dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1284         dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1285         dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1286         dump_capabilities |= DUMP_TYPE_CCW;
1287         return 0;
1288 }
1289
1290 static int __init dump_fcp_init(void)
1291 {
1292         int rc;
1293
1294         if (!sclp_ipl_info.has_dump)
1295                 return 0; /* LDIPL DUMP is not installed */
1296         dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1297         if (!dump_block_fcp)
1298                 return -ENOMEM;
1299         rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1300         if (rc) {
1301                 free_page((unsigned long)dump_block_fcp);
1302                 return rc;
1303         }
1304         dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1305         dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1306         dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1307         dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1308         dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1309         dump_capabilities |= DUMP_TYPE_FCP;
1310         return 0;
1311 }
1312
1313 static int __init dump_init(void)
1314 {
1315         int rc;
1316
1317         dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1318         if (!dump_kset)
1319                 return -ENOMEM;
1320         rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1321         if (rc) {
1322                 kset_unregister(dump_kset);
1323                 return rc;
1324         }
1325         rc = dump_ccw_init();
1326         if (rc)
1327                 return rc;
1328         rc = dump_fcp_init();
1329         if (rc)
1330                 return rc;
1331         dump_set_type(DUMP_TYPE_NONE);
1332         return 0;
1333 }
1334
1335 static struct shutdown_action __refdata dump_action = {
1336         .name   = SHUTDOWN_ACTION_DUMP_STR,
1337         .fn     = dump_run,
1338         .init   = dump_init,
1339 };
1340
1341 static void dump_reipl_run(struct shutdown_trigger *trigger)
1342 {
1343         unsigned long ipib = (unsigned long) reipl_block_actual;
1344         unsigned int csum;
1345
1346         csum = (__force unsigned int)
1347                csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
1348         mem_assign_absolute(S390_lowcore.ipib, ipib);
1349         mem_assign_absolute(S390_lowcore.ipib_checksum, csum);
1350         dump_run(trigger);
1351 }
1352
1353 static struct shutdown_action __refdata dump_reipl_action = {
1354         .name   = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1355         .fn     = dump_reipl_run,
1356 };
1357
1358 /*
1359  * vmcmd shutdown action: Trigger vm command on shutdown.
1360  */
1361
1362 static char vmcmd_on_reboot[128];
1363 static char vmcmd_on_panic[128];
1364 static char vmcmd_on_halt[128];
1365 static char vmcmd_on_poff[128];
1366 static char vmcmd_on_restart[128];
1367
1368 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1369 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1370 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1371 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1372 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1373
1374 static struct attribute *vmcmd_attrs[] = {
1375         &sys_vmcmd_on_reboot_attr.attr,
1376         &sys_vmcmd_on_panic_attr.attr,
1377         &sys_vmcmd_on_halt_attr.attr,
1378         &sys_vmcmd_on_poff_attr.attr,
1379         &sys_vmcmd_on_restart_attr.attr,
1380         NULL,
1381 };
1382
1383 static struct attribute_group vmcmd_attr_group = {
1384         .attrs = vmcmd_attrs,
1385 };
1386
1387 static struct kset *vmcmd_kset;
1388
1389 static void vmcmd_run(struct shutdown_trigger *trigger)
1390 {
1391         char *cmd;
1392
1393         if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1394                 cmd = vmcmd_on_reboot;
1395         else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1396                 cmd = vmcmd_on_panic;
1397         else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1398                 cmd = vmcmd_on_halt;
1399         else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1400                 cmd = vmcmd_on_poff;
1401         else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
1402                 cmd = vmcmd_on_restart;
1403         else
1404                 return;
1405
1406         if (strlen(cmd) == 0)
1407                 return;
1408         __cpcmd(cmd, NULL, 0, NULL);
1409 }
1410
1411 static int vmcmd_init(void)
1412 {
1413         if (!MACHINE_IS_VM)
1414                 return -EOPNOTSUPP;
1415         vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1416         if (!vmcmd_kset)
1417                 return -ENOMEM;
1418         return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1419 }
1420
1421 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1422                                               vmcmd_run, vmcmd_init};
1423
1424 /*
1425  * stop shutdown action: Stop Linux on shutdown.
1426  */
1427
1428 static void stop_run(struct shutdown_trigger *trigger)
1429 {
1430         if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
1431             strcmp(trigger->name, ON_RESTART_STR) == 0)
1432                 disabled_wait((unsigned long) __builtin_return_address(0));
1433         smp_stop_cpu();
1434 }
1435
1436 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1437                                              stop_run, NULL};
1438
1439 /* action list */
1440
1441 static struct shutdown_action *shutdown_actions_list[] = {
1442         &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1443         &vmcmd_action, &stop_action};
1444 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1445
1446 /*
1447  * Trigger section
1448  */
1449
1450 static struct kset *shutdown_actions_kset;
1451
1452 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1453                        size_t len)
1454 {
1455         int i;
1456
1457         for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1458                 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1459                         if (shutdown_actions_list[i]->init_rc) {
1460                                 return shutdown_actions_list[i]->init_rc;
1461                         } else {
1462                                 trigger->action = shutdown_actions_list[i];
1463                                 return len;
1464                         }
1465                 }
1466         }
1467         return -EINVAL;
1468 }
1469
1470 /* on reipl */
1471
1472 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1473                                                     &reipl_action};
1474
1475 static ssize_t on_reboot_show(struct kobject *kobj,
1476                               struct kobj_attribute *attr, char *page)
1477 {
1478         return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1479 }
1480
1481 static ssize_t on_reboot_store(struct kobject *kobj,
1482                                struct kobj_attribute *attr,
1483                                const char *buf, size_t len)
1484 {
1485         return set_trigger(buf, &on_reboot_trigger, len);
1486 }
1487 static struct kobj_attribute on_reboot_attr = __ATTR_RW(on_reboot);
1488
1489 static void do_machine_restart(char *__unused)
1490 {
1491         smp_send_stop();
1492         on_reboot_trigger.action->fn(&on_reboot_trigger);
1493         reipl_run(NULL);
1494 }
1495 void (*_machine_restart)(char *command) = do_machine_restart;
1496
1497 /* on panic */
1498
1499 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1500
1501 static ssize_t on_panic_show(struct kobject *kobj,
1502                              struct kobj_attribute *attr, char *page)
1503 {
1504         return sprintf(page, "%s\n", on_panic_trigger.action->name);
1505 }
1506
1507 static ssize_t on_panic_store(struct kobject *kobj,
1508                               struct kobj_attribute *attr,
1509                               const char *buf, size_t len)
1510 {
1511         return set_trigger(buf, &on_panic_trigger, len);
1512 }
1513 static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic);
1514
1515 static void do_panic(void)
1516 {
1517         lgr_info_log();
1518         on_panic_trigger.action->fn(&on_panic_trigger);
1519         stop_run(&on_panic_trigger);
1520 }
1521
1522 /* on restart */
1523
1524 static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
1525         &stop_action};
1526
1527 static ssize_t on_restart_show(struct kobject *kobj,
1528                                struct kobj_attribute *attr, char *page)
1529 {
1530         return sprintf(page, "%s\n", on_restart_trigger.action->name);
1531 }
1532
1533 static ssize_t on_restart_store(struct kobject *kobj,
1534                                 struct kobj_attribute *attr,
1535                                 const char *buf, size_t len)
1536 {
1537         return set_trigger(buf, &on_restart_trigger, len);
1538 }
1539 static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart);
1540
1541 static void __do_restart(void *ignore)
1542 {
1543         __arch_local_irq_stosm(0x04); /* enable DAT */
1544         smp_send_stop();
1545 #ifdef CONFIG_CRASH_DUMP
1546         crash_kexec(NULL);
1547 #endif
1548         on_restart_trigger.action->fn(&on_restart_trigger);
1549         stop_run(&on_restart_trigger);
1550 }
1551
1552 void do_restart(void)
1553 {
1554         tracing_off();
1555         debug_locks_off();
1556         lgr_info_log();
1557         smp_call_online_cpu(__do_restart, NULL);
1558 }
1559
1560 /* on halt */
1561
1562 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1563
1564 static ssize_t on_halt_show(struct kobject *kobj,
1565                             struct kobj_attribute *attr, char *page)
1566 {
1567         return sprintf(page, "%s\n", on_halt_trigger.action->name);
1568 }
1569
1570 static ssize_t on_halt_store(struct kobject *kobj,
1571                              struct kobj_attribute *attr,
1572                              const char *buf, size_t len)
1573 {
1574         return set_trigger(buf, &on_halt_trigger, len);
1575 }
1576 static struct kobj_attribute on_halt_attr = __ATTR_RW(on_halt);
1577
1578 static void do_machine_halt(void)
1579 {
1580         smp_send_stop();
1581         on_halt_trigger.action->fn(&on_halt_trigger);
1582         stop_run(&on_halt_trigger);
1583 }
1584 void (*_machine_halt)(void) = do_machine_halt;
1585
1586 /* on power off */
1587
1588 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1589
1590 static ssize_t on_poff_show(struct kobject *kobj,
1591                             struct kobj_attribute *attr, char *page)
1592 {
1593         return sprintf(page, "%s\n", on_poff_trigger.action->name);
1594 }
1595
1596 static ssize_t on_poff_store(struct kobject *kobj,
1597                              struct kobj_attribute *attr,
1598                              const char *buf, size_t len)
1599 {
1600         return set_trigger(buf, &on_poff_trigger, len);
1601 }
1602 static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff);
1603
1604 static void do_machine_power_off(void)
1605 {
1606         smp_send_stop();
1607         on_poff_trigger.action->fn(&on_poff_trigger);
1608         stop_run(&on_poff_trigger);
1609 }
1610 void (*_machine_power_off)(void) = do_machine_power_off;
1611
1612 static struct attribute *shutdown_action_attrs[] = {
1613         &on_restart_attr.attr,
1614         &on_reboot_attr.attr,
1615         &on_panic_attr.attr,
1616         &on_halt_attr.attr,
1617         &on_poff_attr.attr,
1618         NULL,
1619 };
1620
1621 static struct attribute_group shutdown_action_attr_group = {
1622         .attrs = shutdown_action_attrs,
1623 };
1624
1625 static void __init shutdown_triggers_init(void)
1626 {
1627         shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1628                                                     firmware_kobj);
1629         if (!shutdown_actions_kset)
1630                 goto fail;
1631         if (sysfs_create_group(&shutdown_actions_kset->kobj,
1632                                &shutdown_action_attr_group))
1633                 goto fail;
1634         return;
1635 fail:
1636         panic("shutdown_triggers_init failed\n");
1637 }
1638
1639 static void __init shutdown_actions_init(void)
1640 {
1641         int i;
1642
1643         for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1644                 if (!shutdown_actions_list[i]->init)
1645                         continue;
1646                 shutdown_actions_list[i]->init_rc =
1647                         shutdown_actions_list[i]->init();
1648         }
1649 }
1650
1651 static int __init s390_ipl_init(void)
1652 {
1653         char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40};
1654
1655         sclp_early_get_ipl_info(&sclp_ipl_info);
1656         /*
1657          * Fix loadparm: There are systems where the (SCSI) LOADPARM
1658          * returned by read SCP info is invalid (contains EBCDIC blanks)
1659          * when the system has been booted via diag308. In that case we use
1660          * the value from diag308, if available.
1661          *
1662          * There are also systems where diag308 store does not work in
1663          * case the system is booted from HMC. Fortunately in this case
1664          * READ SCP info provides the correct value.
1665          */
1666         if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 && ipl_block_valid)
1667                 memcpy(sclp_ipl_info.loadparm, ipl_block.hdr.loadparm, LOADPARM_LEN);
1668         shutdown_actions_init();
1669         shutdown_triggers_init();
1670         return 0;
1671 }
1672
1673 __initcall(s390_ipl_init);
1674
1675 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1676 {
1677         int sx, dx;
1678
1679         dx = 0;
1680         for (sx = 0; src[sx] != 0; sx++) {
1681                 if (src[sx] == '"')
1682                         continue;
1683                 dst[dx++] = src[sx];
1684                 if (dx >= n)
1685                         break;
1686         }
1687 }
1688
1689 static int __init vmcmd_on_reboot_setup(char *str)
1690 {
1691         if (!MACHINE_IS_VM)
1692                 return 1;
1693         strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1694         vmcmd_on_reboot[127] = 0;
1695         on_reboot_trigger.action = &vmcmd_action;
1696         return 1;
1697 }
1698 __setup("vmreboot=", vmcmd_on_reboot_setup);
1699
1700 static int __init vmcmd_on_panic_setup(char *str)
1701 {
1702         if (!MACHINE_IS_VM)
1703                 return 1;
1704         strncpy_skip_quote(vmcmd_on_panic, str, 127);
1705         vmcmd_on_panic[127] = 0;
1706         on_panic_trigger.action = &vmcmd_action;
1707         return 1;
1708 }
1709 __setup("vmpanic=", vmcmd_on_panic_setup);
1710
1711 static int __init vmcmd_on_halt_setup(char *str)
1712 {
1713         if (!MACHINE_IS_VM)
1714                 return 1;
1715         strncpy_skip_quote(vmcmd_on_halt, str, 127);
1716         vmcmd_on_halt[127] = 0;
1717         on_halt_trigger.action = &vmcmd_action;
1718         return 1;
1719 }
1720 __setup("vmhalt=", vmcmd_on_halt_setup);
1721
1722 static int __init vmcmd_on_poff_setup(char *str)
1723 {
1724         if (!MACHINE_IS_VM)
1725                 return 1;
1726         strncpy_skip_quote(vmcmd_on_poff, str, 127);
1727         vmcmd_on_poff[127] = 0;
1728         on_poff_trigger.action = &vmcmd_action;
1729         return 1;
1730 }
1731 __setup("vmpoff=", vmcmd_on_poff_setup);
1732
1733 static int on_panic_notify(struct notifier_block *self,
1734                            unsigned long event, void *data)
1735 {
1736         do_panic();
1737         return NOTIFY_OK;
1738 }
1739
1740 static struct notifier_block on_panic_nb = {
1741         .notifier_call = on_panic_notify,
1742         .priority = INT_MIN,
1743 };
1744
1745 void __init setup_ipl(void)
1746 {
1747         BUILD_BUG_ON(sizeof(struct ipl_parameter_block) != PAGE_SIZE);
1748
1749         ipl_info.type = get_ipl_type();
1750         switch (ipl_info.type) {
1751         case IPL_TYPE_CCW:
1752                 ipl_info.data.ccw.dev_id.ssid = ipl_block.ipl_info.ccw.ssid;
1753                 ipl_info.data.ccw.dev_id.devno = ipl_block.ipl_info.ccw.devno;
1754                 break;
1755         case IPL_TYPE_FCP:
1756         case IPL_TYPE_FCP_DUMP:
1757                 ipl_info.data.fcp.dev_id.ssid = 0;
1758                 ipl_info.data.fcp.dev_id.devno = ipl_block.ipl_info.fcp.devno;
1759                 ipl_info.data.fcp.wwpn = ipl_block.ipl_info.fcp.wwpn;
1760                 ipl_info.data.fcp.lun = ipl_block.ipl_info.fcp.lun;
1761                 break;
1762         case IPL_TYPE_NSS:
1763         case IPL_TYPE_UNKNOWN:
1764                 /* We have no info to copy */
1765                 break;
1766         }
1767         atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1768 }
1769
1770 void __init ipl_store_parameters(void)
1771 {
1772         int rc;
1773
1774         rc = diag308(DIAG308_STORE, &ipl_block);
1775         if (rc == DIAG308_RC_OK && ipl_block.hdr.version <= IPL_MAX_SUPPORTED_VERSION)
1776                 ipl_block_valid = 1;
1777 }
1778
1779 void s390_reset_system(void)
1780 {
1781         /* Disable prefixing */
1782         set_prefix(0);
1783
1784         /* Disable lowcore protection */
1785         __ctl_clear_bit(0, 28);
1786         diag308_reset();
1787 }