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/cio.h>
  28 #include <asm/ebcdic.h>
  29 #include <asm/reset.h>
  30 #include <asm/sclp.h>
  31 #include <asm/checksum.h>
  32 #include <asm/debug.h>
  33 #include <asm/os_info.h>
  34 #include "entry.h"
  35
  36 #define IPL_PARM_BLOCK_VERSION 0
  37
  38 #define IPL_UNKNOWN_STR         "unknown"
  39 #define IPL_CCW_STR             "ccw"
  40 #define IPL_FCP_STR             "fcp"
  41 #define IPL_FCP_DUMP_STR        "fcp_dump"
  42 #define IPL_NSS_STR             "nss"
  43
  44 #define DUMP_CCW_STR            "ccw"
  45 #define DUMP_FCP_STR            "fcp"
  46 #define DUMP_NONE_STR           "none"
  47
  48 /*
  49  * Four shutdown trigger types are supported:
  50  * - panic
  51  * - halt
  52  * - power off
  53  * - reipl
  54  * - restart
  55  */
  56 #define ON_PANIC_STR            "on_panic"
  57 #define ON_HALT_STR             "on_halt"
  58 #define ON_POFF_STR             "on_poff"
  59 #define ON_REIPL_STR            "on_reboot"
  60 #define ON_RESTART_STR          "on_restart"
  61
  62 struct shutdown_action;
  63 struct shutdown_trigger {
  64         char *name;
  65         struct shutdown_action *action;
  66 };
  67
  68 /*
  69  * The following shutdown action types are supported:
  70  */
  71 #define SHUTDOWN_ACTION_IPL_STR         "ipl"
  72 #define SHUTDOWN_ACTION_REIPL_STR       "reipl"
  73 #define SHUTDOWN_ACTION_DUMP_STR        "dump"
  74 #define SHUTDOWN_ACTION_VMCMD_STR       "vmcmd"
  75 #define SHUTDOWN_ACTION_STOP_STR        "stop"
  76 #define SHUTDOWN_ACTION_DUMP_REIPL_STR  "dump_reipl"
  77
  78 struct shutdown_action {
  79         char *name;
  80         void (*fn) (struct shutdown_trigger *trigger);
  81         int (*init) (void);
  82         int init_rc;
  83 };
  84
  85 static char *ipl_type_str(enum ipl_type type)
  86 {
  87         switch (type) {
  88         case IPL_TYPE_CCW:
  89                 return IPL_CCW_STR;
  90         case IPL_TYPE_FCP:
  91                 return IPL_FCP_STR;
  92         case IPL_TYPE_FCP_DUMP:
  93                 return IPL_FCP_DUMP_STR;
  94         case IPL_TYPE_NSS:
  95                 return IPL_NSS_STR;
  96         case IPL_TYPE_UNKNOWN:
  97         default:
  98                 return IPL_UNKNOWN_STR;
  99         }
 100 }
 101
 102 enum dump_type {
 103         DUMP_TYPE_NONE  = 1,
 104         DUMP_TYPE_CCW   = 2,
 105         DUMP_TYPE_FCP   = 4,
 106 };
 107
 108 static char *dump_type_str(enum dump_type type)
 109 {
 110         switch (type) {
 111         case DUMP_TYPE_NONE:
 112                 return DUMP_NONE_STR;
 113         case DUMP_TYPE_CCW:
 114                 return DUMP_CCW_STR;
 115         case DUMP_TYPE_FCP:
 116                 return DUMP_FCP_STR;
 117         default:
 118                 return NULL;
 119         }
 120 }
 121
 122 static u8 ipl_ssid;
 123 static u16 ipl_devno;
 124 u32 ipl_flags;
 125
 126 enum ipl_method {
 127         REIPL_METHOD_CCW_CIO,
 128         REIPL_METHOD_CCW_DIAG,
 129         REIPL_METHOD_CCW_VM,
 130         REIPL_METHOD_FCP_RO_DIAG,
 131         REIPL_METHOD_FCP_RW_DIAG,
 132         REIPL_METHOD_FCP_RO_VM,
 133         REIPL_METHOD_FCP_DUMP,
 134         REIPL_METHOD_NSS,
 135         REIPL_METHOD_NSS_DIAG,
 136         REIPL_METHOD_DEFAULT,
 137 };
 138
 139 enum dump_method {
 140         DUMP_METHOD_NONE,
 141         DUMP_METHOD_CCW_CIO,
 142         DUMP_METHOD_CCW_DIAG,
 143         DUMP_METHOD_CCW_VM,
 144         DUMP_METHOD_FCP_DIAG,
 145 };
 146
 147 static int diag308_set_works;
 148
 149 static struct ipl_parameter_block ipl_block;
 150
 151 static int reipl_capabilities = IPL_TYPE_UNKNOWN;
 152
 153 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
 154 static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
 155 static struct ipl_parameter_block *reipl_block_fcp;
 156 static struct ipl_parameter_block *reipl_block_ccw;
 157 static struct ipl_parameter_block *reipl_block_nss;
 158 static struct ipl_parameter_block *reipl_block_actual;
 159
 160 static int dump_capabilities = DUMP_TYPE_NONE;
 161 static enum dump_type dump_type = DUMP_TYPE_NONE;
 162 static enum dump_method dump_method = DUMP_METHOD_NONE;
 163 static struct ipl_parameter_block *dump_block_fcp;
 164 static struct ipl_parameter_block *dump_block_ccw;
 165
 166 static struct sclp_ipl_info sclp_ipl_info;
 167
 168 static inline int __diag308(unsigned long subcode, void *addr)
 169 {
 170         register unsigned long _addr asm("0") = (unsigned long) addr;
 171         register unsigned long _rc asm("1") = 0;
 172
 173         asm volatile(
 174                 "       diag    %0,%2,0x308\n"
 175                 "0:     nopr    %%r7\n"
 176                 EX_TABLE(0b,0b)
 177                 : "+d" (_addr), "+d" (_rc)
 178                 : "d" (subcode) : "cc", "memory");
 179         return _rc;
 180 }
 181
 182 int diag308(unsigned long subcode, void *addr)
 183 {
 184         diag_stat_inc(DIAG_STAT_X308);
 185         return __diag308(subcode, addr);
 186 }
 187 EXPORT_SYMBOL_GPL(diag308);
 188
 189 /* SYSFS */
 190
 191 #define IPL_ATTR_SHOW_FN(_prefix, _name, _format, args...)              \
 192 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,     \
 193                 struct kobj_attribute *attr,                            \
 194                 char *page)                                             \
 195 {                                                                       \
 196         return snprintf(page, PAGE_SIZE, _format, ##args);              \
 197 }
 198
 199 #define IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk)                 \
 200 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,    \
 201                 struct kobj_attribute *attr,                            \
 202                 const char *buf, size_t len)                            \
 203 {                                                                       \
 204         unsigned long long ssid, devno;                                 \
 205                                                                         \
 206         if (sscanf(buf, "0.%llx.%llx\n", &ssid, &devno) != 2)           \
 207                 return -EINVAL;                                         \
 208                                                                         \
 209         if (ssid > __MAX_SSID || devno > __MAX_SUBCHANNEL)              \
 210                 return -EINVAL;                                         \
 211                                                                         \
 212         _ipl_blk.ssid = ssid;                                           \
 213         _ipl_blk.devno = devno;                                         \
 214         return len;                                                     \
 215 }
 216
 217 #define DEFINE_IPL_CCW_ATTR_RW(_prefix, _name, _ipl_blk)                \
 218 IPL_ATTR_SHOW_FN(_prefix, _name, "0.%x.%04x\n",                         \
 219                  _ipl_blk.ssid, _ipl_blk.devno);                        \
 220 IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk);                        \
 221 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 222         __ATTR(_name, (S_IRUGO | S_IWUSR),                              \
 223                sys_##_prefix##_##_name##_show,                          \
 224                sys_##_prefix##_##_name##_store)                         \
 225
 226 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value)             \
 227 IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value)                       \
 228 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 229         __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL)
 230
 231 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)   \
 232 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value) \
 233 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,    \
 234                 struct kobj_attribute *attr,                            \
 235                 const char *buf, size_t len)                            \
 236 {                                                                       \
 237         unsigned long long value;                                       \
 238         if (sscanf(buf, _fmt_in, &value) != 1)                          \
 239                 return -EINVAL;                                         \
 240         _value = value;                                                 \
 241         return len;                                                     \
 242 }                                                                       \
 243 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 244         __ATTR(_name,(S_IRUGO | S_IWUSR),                               \
 245                         sys_##_prefix##_##_name##_show,                 \
 246                         sys_##_prefix##_##_name##_store)
 247
 248 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
 249 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, _value)                      \
 250 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,    \
 251                 struct kobj_attribute *attr,                            \
 252                 const char *buf, size_t len)                            \
 253 {                                                                       \
 254         strncpy(_value, buf, sizeof(_value) - 1);                       \
 255         strim(_value);                                                  \
 256         return len;                                                     \
 257 }                                                                       \
 258 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 259         __ATTR(_name,(S_IRUGO | S_IWUSR),                               \
 260                         sys_##_prefix##_##_name##_show,                 \
 261                         sys_##_prefix##_##_name##_store)
 262
 263 static void make_attrs_ro(struct attribute **attrs)
 264 {
 265         while (*attrs) {
 266                 (*attrs)->mode = S_IRUGO;
 267                 attrs++;
 268         }
 269 }
 270
 271 /*
 272  * ipl section
 273  */
 274
 275 static __init enum ipl_type get_ipl_type(void)
 276 {
 277         struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
 278
 279         if (!(ipl_flags & IPL_DEVNO_VALID))
 280                 return IPL_TYPE_UNKNOWN;
 281         if (!(ipl_flags & IPL_PARMBLOCK_VALID))
 282                 return IPL_TYPE_CCW;
 283         if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
 284                 return IPL_TYPE_UNKNOWN;
 285         if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
 286                 return IPL_TYPE_UNKNOWN;
 287         if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
 288                 return IPL_TYPE_FCP_DUMP;
 289         return IPL_TYPE_FCP;
 290 }
 291
 292 struct ipl_info ipl_info;
 293 EXPORT_SYMBOL_GPL(ipl_info);
 294
 295 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
 296                              char *page)
 297 {
 298         return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
 299 }
 300
 301 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
 302
 303 /* VM IPL PARM routines */
 304 static size_t reipl_get_ascii_vmparm(char *dest, size_t size,
 305                                      const struct ipl_parameter_block *ipb)
 306 {
 307         int i;
 308         size_t len;
 309         char has_lowercase = 0;
 310
 311         len = 0;
 312         if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
 313             (ipb->ipl_info.ccw.vm_parm_len > 0)) {
 314
 315                 len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
 316                 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
 317                 /* If at least one character is lowercase, we assume mixed
 318                  * case; otherwise we convert everything to lowercase.
 319                  */
 320                 for (i = 0; i < len; i++)
 321                         if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
 322                             (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
 323                             (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
 324                                 has_lowercase = 1;
 325                                 break;
 326                         }
 327                 if (!has_lowercase)
 328                         EBC_TOLOWER(dest, len);
 329                 EBCASC(dest, len);
 330         }
 331         dest[len] = 0;
 332
 333         return len;
 334 }
 335
 336 size_t append_ipl_vmparm(char *dest, size_t size)
 337 {
 338         size_t rc;
 339
 340         rc = 0;
 341         if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
 342                 rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
 343         else
 344                 dest[0] = 0;
 345         return rc;
 346 }
 347
 348 static ssize_t ipl_vm_parm_show(struct kobject *kobj,
 349                                 struct kobj_attribute *attr, char *page)
 350 {
 351         char parm[DIAG308_VMPARM_SIZE + 1] = {};
 352
 353         append_ipl_vmparm(parm, sizeof(parm));
 354         return sprintf(page, "%s\n", parm);
 355 }
 356
 357 static size_t scpdata_length(const char* buf, size_t count)
 358 {
 359         while (count) {
 360                 if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
 361                         break;
 362                 count--;
 363         }
 364         return count;
 365 }
 366
 367 static size_t reipl_append_ascii_scpdata(char *dest, size_t size,
 368                                          const struct ipl_parameter_block *ipb)
 369 {
 370         size_t count;
 371         size_t i;
 372         int has_lowercase;
 373
 374         count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data,
 375                                              ipb->ipl_info.fcp.scp_data_len));
 376         if (!count)
 377                 goto out;
 378
 379         has_lowercase = 0;
 380         for (i = 0; i < count; i++) {
 381                 if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
 382                         count = 0;
 383                         goto out;
 384                 }
 385                 if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
 386                         has_lowercase = 1;
 387         }
 388
 389         if (has_lowercase)
 390                 memcpy(dest, ipb->ipl_info.fcp.scp_data, count);
 391         else
 392                 for (i = 0; i < count; i++)
 393                         dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]);
 394 out:
 395         dest[count] = '\0';
 396         return count;
 397 }
 398
 399 size_t append_ipl_scpdata(char *dest, size_t len)
 400 {
 401         size_t rc;
 402
 403         rc = 0;
 404         if (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP)
 405                 rc = reipl_append_ascii_scpdata(dest, len, &ipl_block);
 406         else
 407                 dest[0] = 0;
 408         return rc;
 409 }
 410
 411
 412 static struct kobj_attribute sys_ipl_vm_parm_attr =
 413         __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
 414
 415 static ssize_t sys_ipl_device_show(struct kobject *kobj,
 416                                    struct kobj_attribute *attr, char *page)
 417 {
 418         struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
 419
 420         switch (ipl_info.type) {
 421         case IPL_TYPE_CCW:
 422                 return sprintf(page, "0.%x.%04x\n", ipl_ssid, ipl_devno);
 423         case IPL_TYPE_FCP:
 424         case IPL_TYPE_FCP_DUMP:
 425                 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
 426         default:
 427                 return 0;
 428         }
 429 }
 430
 431 static struct kobj_attribute sys_ipl_device_attr =
 432         __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
 433
 434 static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
 435                                   struct bin_attribute *attr, char *buf,
 436                                   loff_t off, size_t count)
 437 {
 438         return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START,
 439                                         IPL_PARMBLOCK_SIZE);
 440 }
 441 static struct bin_attribute ipl_parameter_attr =
 442         __BIN_ATTR(binary_parameter, S_IRUGO, ipl_parameter_read, NULL,
 443                    PAGE_SIZE);
 444
 445 static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
 446                                  struct bin_attribute *attr, char *buf,
 447                                  loff_t off, size_t count)
 448 {
 449         unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
 450         void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
 451
 452         return memory_read_from_buffer(buf, count, &off, scp_data, size);
 453 }
 454 static struct bin_attribute ipl_scp_data_attr =
 455         __BIN_ATTR(scp_data, S_IRUGO, ipl_scp_data_read, NULL, PAGE_SIZE);
 456
 457 static struct bin_attribute *ipl_fcp_bin_attrs[] = {
 458         &ipl_parameter_attr,
 459         &ipl_scp_data_attr,
 460         NULL,
 461 };
 462
 463 /* FCP ipl device attributes */
 464
 465 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
 466                    IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
 467 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
 468                    IPL_PARMBLOCK_START->ipl_info.fcp.lun);
 469 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
 470                    IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
 471 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
 472                    IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
 473
 474 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
 475                                      struct kobj_attribute *attr, char *page)
 476 {
 477         char loadparm[LOADPARM_LEN + 1] = {};
 478
 479         if (!sclp_ipl_info.is_valid)
 480                 return sprintf(page, "#unknown#\n");
 481         memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
 482         EBCASC(loadparm, LOADPARM_LEN);
 483         strim(loadparm);
 484         return sprintf(page, "%s\n", loadparm);
 485 }
 486
 487 static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
 488         __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
 489
 490 static struct attribute *ipl_fcp_attrs[] = {
 491         &sys_ipl_type_attr.attr,
 492         &sys_ipl_device_attr.attr,
 493         &sys_ipl_fcp_wwpn_attr.attr,
 494         &sys_ipl_fcp_lun_attr.attr,
 495         &sys_ipl_fcp_bootprog_attr.attr,
 496         &sys_ipl_fcp_br_lba_attr.attr,
 497         &sys_ipl_ccw_loadparm_attr.attr,
 498         NULL,
 499 };
 500
 501 static struct attribute_group ipl_fcp_attr_group = {
 502         .attrs = ipl_fcp_attrs,
 503         .bin_attrs = ipl_fcp_bin_attrs,
 504 };
 505
 506 /* CCW ipl device attributes */
 507
 508 static struct attribute *ipl_ccw_attrs_vm[] = {
 509         &sys_ipl_type_attr.attr,
 510         &sys_ipl_device_attr.attr,
 511         &sys_ipl_ccw_loadparm_attr.attr,
 512         &sys_ipl_vm_parm_attr.attr,
 513         NULL,
 514 };
 515
 516 static struct attribute *ipl_ccw_attrs_lpar[] = {
 517         &sys_ipl_type_attr.attr,
 518         &sys_ipl_device_attr.attr,
 519         &sys_ipl_ccw_loadparm_attr.attr,
 520         NULL,
 521 };
 522
 523 static struct attribute_group ipl_ccw_attr_group_vm = {
 524         .attrs = ipl_ccw_attrs_vm,
 525 };
 526
 527 static struct attribute_group ipl_ccw_attr_group_lpar = {
 528         .attrs = ipl_ccw_attrs_lpar
 529 };
 530
 531 /* UNKNOWN ipl device attributes */
 532
 533 static struct attribute *ipl_unknown_attrs[] = {
 534         &sys_ipl_type_attr.attr,
 535         NULL,
 536 };
 537
 538 static struct attribute_group ipl_unknown_attr_group = {
 539         .attrs = ipl_unknown_attrs,
 540 };
 541
 542 static struct kset *ipl_kset;
 543
 544 static void __ipl_run(void *unused)
 545 {
 546         diag308(DIAG308_LOAD_CLEAR, NULL);
 547         if (MACHINE_IS_VM)
 548                 __cpcmd("IPL", NULL, 0, NULL);
 549         else if (ipl_info.type == IPL_TYPE_CCW)
 550                 reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
 551 }
 552
 553 static void ipl_run(struct shutdown_trigger *trigger)
 554 {
 555         smp_call_ipl_cpu(__ipl_run, NULL);
 556 }
 557
 558 static int __init ipl_init(void)
 559 {
 560         int rc;
 561
 562         ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
 563         if (!ipl_kset) {
 564                 rc = -ENOMEM;
 565                 goto out;
 566         }
 567         switch (ipl_info.type) {
 568         case IPL_TYPE_CCW:
 569                 if (MACHINE_IS_VM)
 570                         rc = sysfs_create_group(&ipl_kset->kobj,
 571                                                 &ipl_ccw_attr_group_vm);
 572                 else
 573                         rc = sysfs_create_group(&ipl_kset->kobj,
 574                                                 &ipl_ccw_attr_group_lpar);
 575                 break;
 576         case IPL_TYPE_FCP:
 577         case IPL_TYPE_FCP_DUMP:
 578                 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
 579                 break;
 580         default:
 581                 rc = sysfs_create_group(&ipl_kset->kobj,
 582                                         &ipl_unknown_attr_group);
 583                 break;
 584         }
 585 out:
 586         if (rc)
 587                 panic("ipl_init failed: rc = %i\n", rc);
 588
 589         return 0;
 590 }
 591
 592 static struct shutdown_action __refdata ipl_action = {
 593         .name   = SHUTDOWN_ACTION_IPL_STR,
 594         .fn     = ipl_run,
 595         .init   = ipl_init,
 596 };
 597
 598 /*
 599  * reipl shutdown action: Reboot Linux on shutdown.
 600  */
 601
 602 /* VM IPL PARM attributes */
 603 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
 604                                           char *page)
 605 {
 606         char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
 607
 608         reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
 609         return sprintf(page, "%s\n", vmparm);
 610 }
 611
 612 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
 613                                           size_t vmparm_max,
 614                                           const char *buf, size_t len)
 615 {
 616         int i, ip_len;
 617
 618         /* ignore trailing newline */
 619         ip_len = len;
 620         if ((len > 0) && (buf[len - 1] == '\n'))
 621                 ip_len--;
 622
 623         if (ip_len > vmparm_max)
 624                 return -EINVAL;
 625
 626         /* parm is used to store kernel options, check for common chars */
 627         for (i = 0; i < ip_len; i++)
 628                 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
 629                         return -EINVAL;
 630
 631         memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
 632         ipb->ipl_info.ccw.vm_parm_len = ip_len;
 633         if (ip_len > 0) {
 634                 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
 635                 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
 636                 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
 637         } else {
 638                 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
 639         }
 640
 641         return len;
 642 }
 643
 644 /* NSS wrapper */
 645 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
 646                                      struct kobj_attribute *attr, char *page)
 647 {
 648         return reipl_generic_vmparm_show(reipl_block_nss, page);
 649 }
 650
 651 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
 652                                       struct kobj_attribute *attr,
 653                                       const char *buf, size_t len)
 654 {
 655         return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
 656 }
 657
 658 /* CCW wrapper */
 659 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
 660                                      struct kobj_attribute *attr, char *page)
 661 {
 662         return reipl_generic_vmparm_show(reipl_block_ccw, page);
 663 }
 664
 665 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
 666                                       struct kobj_attribute *attr,
 667                                       const char *buf, size_t len)
 668 {
 669         return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
 670 }
 671
 672 static struct kobj_attribute sys_reipl_nss_vmparm_attr =
 673         __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
 674                                         reipl_nss_vmparm_store);
 675 static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
 676         __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
 677                                         reipl_ccw_vmparm_store);
 678
 679 /* FCP reipl device attributes */
 680
 681 static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
 682                                       struct bin_attribute *attr,
 683                                       char *buf, loff_t off, size_t count)
 684 {
 685         size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
 686         void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
 687
 688         return memory_read_from_buffer(buf, count, &off, scp_data, size);
 689 }
 690
 691 static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
 692                                        struct bin_attribute *attr,
 693                                        char *buf, loff_t off, size_t count)
 694 {
 695         size_t scpdata_len = count;
 696         size_t padding;
 697
 698
 699         if (off)
 700                 return -EINVAL;
 701
 702         memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf, count);
 703         if (scpdata_len % 8) {
 704                 padding = 8 - (scpdata_len % 8);
 705                 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
 706                        0, padding);
 707                 scpdata_len += padding;
 708         }
 709
 710         reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
 711         reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
 712         reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
 713
 714         return count;
 715 }
 716 static struct bin_attribute sys_reipl_fcp_scp_data_attr =
 717         __BIN_ATTR(scp_data, (S_IRUGO | S_IWUSR), reipl_fcp_scpdata_read,
 718                    reipl_fcp_scpdata_write, DIAG308_SCPDATA_SIZE);
 719
 720 static struct bin_attribute *reipl_fcp_bin_attrs[] = {
 721         &sys_reipl_fcp_scp_data_attr,
 722         NULL,
 723 };
 724
 725 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n",
 726                    reipl_block_fcp->ipl_info.fcp.wwpn);
 727 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n",
 728                    reipl_block_fcp->ipl_info.fcp.lun);
 729 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
 730                    reipl_block_fcp->ipl_info.fcp.bootprog);
 731 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
 732                    reipl_block_fcp->ipl_info.fcp.br_lba);
 733 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
 734                    reipl_block_fcp->ipl_info.fcp.devno);
 735
 736 static void reipl_get_ascii_loadparm(char *loadparm,
 737                                      struct ipl_parameter_block *ibp)
 738 {
 739         memcpy(loadparm, ibp->hdr.loadparm, LOADPARM_LEN);
 740         EBCASC(loadparm, LOADPARM_LEN);
 741         loadparm[LOADPARM_LEN] = 0;
 742         strim(loadparm);
 743 }
 744
 745 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
 746                                            char *page)
 747 {
 748         char buf[LOADPARM_LEN + 1];
 749
 750         reipl_get_ascii_loadparm(buf, ipb);
 751         return sprintf(page, "%s\n", buf);
 752 }
 753
 754 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
 755                                             const char *buf, size_t len)
 756 {
 757         int i, lp_len;
 758
 759         /* ignore trailing newline */
 760         lp_len = len;
 761         if ((len > 0) && (buf[len - 1] == '\n'))
 762                 lp_len--;
 763         /* loadparm can have max 8 characters and must not start with a blank */
 764         if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
 765                 return -EINVAL;
 766         /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
 767         for (i = 0; i < lp_len; i++) {
 768                 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
 769                     (buf[i] == '.'))
 770                         continue;
 771                 return -EINVAL;
 772         }
 773         /* initialize loadparm with blanks */
 774         memset(ipb->hdr.loadparm, ' ', LOADPARM_LEN);
 775         /* copy and convert to ebcdic */
 776         memcpy(ipb->hdr.loadparm, buf, lp_len);
 777         ASCEBC(ipb->hdr.loadparm, LOADPARM_LEN);
 778         return len;
 779 }
 780
 781 /* FCP wrapper */
 782 static ssize_t reipl_fcp_loadparm_show(struct kobject *kobj,
 783                                        struct kobj_attribute *attr, char *page)
 784 {
 785         return reipl_generic_loadparm_show(reipl_block_fcp, page);
 786 }
 787
 788 static ssize_t reipl_fcp_loadparm_store(struct kobject *kobj,
 789                                         struct kobj_attribute *attr,
 790                                         const char *buf, size_t len)
 791 {
 792         return reipl_generic_loadparm_store(reipl_block_fcp, buf, len);
 793 }
 794
 795 static struct kobj_attribute sys_reipl_fcp_loadparm_attr =
 796         __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_fcp_loadparm_show,
 797                                             reipl_fcp_loadparm_store);
 798
 799 static struct attribute *reipl_fcp_attrs[] = {
 800         &sys_reipl_fcp_device_attr.attr,
 801         &sys_reipl_fcp_wwpn_attr.attr,
 802         &sys_reipl_fcp_lun_attr.attr,
 803         &sys_reipl_fcp_bootprog_attr.attr,
 804         &sys_reipl_fcp_br_lba_attr.attr,
 805         &sys_reipl_fcp_loadparm_attr.attr,
 806         NULL,
 807 };
 808
 809 static struct attribute_group reipl_fcp_attr_group = {
 810         .attrs = reipl_fcp_attrs,
 811         .bin_attrs = reipl_fcp_bin_attrs,
 812 };
 813
 814 /* CCW reipl device attributes */
 815 DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ipl_info.ccw);
 816
 817 /* NSS wrapper */
 818 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
 819                                        struct kobj_attribute *attr, char *page)
 820 {
 821         return reipl_generic_loadparm_show(reipl_block_nss, page);
 822 }
 823
 824 static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
 825                                         struct kobj_attribute *attr,
 826                                         const char *buf, size_t len)
 827 {
 828         return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
 829 }
 830
 831 /* CCW wrapper */
 832 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
 833                                        struct kobj_attribute *attr, char *page)
 834 {
 835         return reipl_generic_loadparm_show(reipl_block_ccw, page);
 836 }
 837
 838 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
 839                                         struct kobj_attribute *attr,
 840                                         const char *buf, size_t len)
 841 {
 842         return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
 843 }
 844
 845 static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
 846         __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
 847                                             reipl_ccw_loadparm_store);
 848
 849 static struct attribute *reipl_ccw_attrs_vm[] = {
 850         &sys_reipl_ccw_device_attr.attr,
 851         &sys_reipl_ccw_loadparm_attr.attr,
 852         &sys_reipl_ccw_vmparm_attr.attr,
 853         NULL,
 854 };
 855
 856 static struct attribute *reipl_ccw_attrs_lpar[] = {
 857         &sys_reipl_ccw_device_attr.attr,
 858         &sys_reipl_ccw_loadparm_attr.attr,
 859         NULL,
 860 };
 861
 862 static struct attribute_group reipl_ccw_attr_group_vm = {
 863         .name  = IPL_CCW_STR,
 864         .attrs = reipl_ccw_attrs_vm,
 865 };
 866
 867 static struct attribute_group reipl_ccw_attr_group_lpar = {
 868         .name  = IPL_CCW_STR,
 869         .attrs = reipl_ccw_attrs_lpar,
 870 };
 871
 872
 873 /* NSS reipl device attributes */
 874 static void reipl_get_ascii_nss_name(char *dst,
 875                                      struct ipl_parameter_block *ipb)
 876 {
 877         memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
 878         EBCASC(dst, NSS_NAME_SIZE);
 879         dst[NSS_NAME_SIZE] = 0;
 880 }
 881
 882 static ssize_t reipl_nss_name_show(struct kobject *kobj,
 883                                    struct kobj_attribute *attr, char *page)
 884 {
 885         char nss_name[NSS_NAME_SIZE + 1] = {};
 886
 887         reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
 888         return sprintf(page, "%s\n", nss_name);
 889 }
 890
 891 static ssize_t reipl_nss_name_store(struct kobject *kobj,
 892                                     struct kobj_attribute *attr,
 893                                     const char *buf, size_t len)
 894 {
 895         int nss_len;
 896
 897         /* ignore trailing newline */
 898         nss_len = len;
 899         if ((len > 0) && (buf[len - 1] == '\n'))
 900                 nss_len--;
 901
 902         if (nss_len > NSS_NAME_SIZE)
 903                 return -EINVAL;
 904
 905         memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
 906         if (nss_len > 0) {
 907                 reipl_block_nss->ipl_info.ccw.vm_flags |=
 908                         DIAG308_VM_FLAGS_NSS_VALID;
 909                 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
 910                 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
 911                 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
 912         } else {
 913                 reipl_block_nss->ipl_info.ccw.vm_flags &=
 914                         ~DIAG308_VM_FLAGS_NSS_VALID;
 915         }
 916
 917         return len;
 918 }
 919
 920 static struct kobj_attribute sys_reipl_nss_name_attr =
 921         __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
 922                                         reipl_nss_name_store);
 923
 924 static struct kobj_attribute sys_reipl_nss_loadparm_attr =
 925         __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
 926                                             reipl_nss_loadparm_store);
 927
 928 static struct attribute *reipl_nss_attrs[] = {
 929         &sys_reipl_nss_name_attr.attr,
 930         &sys_reipl_nss_loadparm_attr.attr,
 931         &sys_reipl_nss_vmparm_attr.attr,
 932         NULL,
 933 };
 934
 935 static struct attribute_group reipl_nss_attr_group = {
 936         .name  = IPL_NSS_STR,
 937         .attrs = reipl_nss_attrs,
 938 };
 939
 940 static void set_reipl_block_actual(struct ipl_parameter_block *reipl_block)
 941 {
 942         reipl_block_actual = reipl_block;
 943         os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual,
 944                           reipl_block->hdr.len);
 945 }
 946
 947 /* reipl type */
 948
 949 static int reipl_set_type(enum ipl_type type)
 950 {
 951         if (!(reipl_capabilities & type))
 952                 return -EINVAL;
 953
 954         switch(type) {
 955         case IPL_TYPE_CCW:
 956                 if (diag308_set_works)
 957                         reipl_method = REIPL_METHOD_CCW_DIAG;
 958                 else if (MACHINE_IS_VM)
 959                         reipl_method = REIPL_METHOD_CCW_VM;
 960                 else
 961                         reipl_method = REIPL_METHOD_CCW_CIO;
 962                 set_reipl_block_actual(reipl_block_ccw);
 963                 break;
 964         case IPL_TYPE_FCP:
 965                 if (diag308_set_works)
 966                         reipl_method = REIPL_METHOD_FCP_RW_DIAG;
 967                 else if (MACHINE_IS_VM)
 968                         reipl_method = REIPL_METHOD_FCP_RO_VM;
 969                 else
 970                         reipl_method = REIPL_METHOD_FCP_RO_DIAG;
 971                 set_reipl_block_actual(reipl_block_fcp);
 972                 break;
 973         case IPL_TYPE_FCP_DUMP:
 974                 reipl_method = REIPL_METHOD_FCP_DUMP;
 975                 break;
 976         case IPL_TYPE_NSS:
 977                 if (diag308_set_works)
 978                         reipl_method = REIPL_METHOD_NSS_DIAG;
 979                 else
 980                         reipl_method = REIPL_METHOD_NSS;
 981                 set_reipl_block_actual(reipl_block_nss);
 982                 break;
 983         case IPL_TYPE_UNKNOWN:
 984                 reipl_method = REIPL_METHOD_DEFAULT;
 985                 break;
 986         default:
 987                 BUG();
 988         }
 989         reipl_type = type;
 990         return 0;
 991 }
 992
 993 static ssize_t reipl_type_show(struct kobject *kobj,
 994                                struct kobj_attribute *attr, char *page)
 995 {
 996         return sprintf(page, "%s\n", ipl_type_str(reipl_type));
 997 }
 998
 999 static ssize_t reipl_type_store(struct kobject *kobj,
1000                                 struct kobj_attribute *attr,
1001                                 const char *buf, size_t len)
1002 {
1003         int rc = -EINVAL;
1004
1005         if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1006                 rc = reipl_set_type(IPL_TYPE_CCW);
1007         else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1008                 rc = reipl_set_type(IPL_TYPE_FCP);
1009         else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1010                 rc = reipl_set_type(IPL_TYPE_NSS);
1011         return (rc != 0) ? rc : len;
1012 }
1013
1014 static struct kobj_attribute reipl_type_attr =
1015         __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
1016
1017 static struct kset *reipl_kset;
1018 static struct kset *reipl_fcp_kset;
1019
1020 static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
1021                            const enum ipl_method m)
1022 {
1023         char loadparm[LOADPARM_LEN + 1] = {};
1024         char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
1025         char nss_name[NSS_NAME_SIZE + 1] = {};
1026         size_t pos = 0;
1027
1028         reipl_get_ascii_loadparm(loadparm, ipb);
1029         reipl_get_ascii_nss_name(nss_name, ipb);
1030         reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
1031
1032         switch (m) {
1033         case REIPL_METHOD_CCW_VM:
1034                 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
1035                 break;
1036         case REIPL_METHOD_NSS:
1037                 pos = sprintf(dst, "IPL %s", nss_name);
1038                 break;
1039         default:
1040                 break;
1041         }
1042         if (strlen(loadparm) > 0)
1043                 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
1044         if (strlen(vmparm) > 0)
1045                 sprintf(dst + pos, " PARM %s", vmparm);
1046 }
1047
1048 static void __reipl_run(void *unused)
1049 {
1050         struct ccw_dev_id devid;
1051         static char buf[128];
1052
1053         switch (reipl_method) {
1054         case REIPL_METHOD_CCW_CIO:
1055                 devid.ssid  = reipl_block_ccw->ipl_info.ccw.ssid;
1056                 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
1057                 reipl_ccw_dev(&devid);
1058                 break;
1059         case REIPL_METHOD_CCW_VM:
1060                 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
1061                 __cpcmd(buf, NULL, 0, NULL);
1062                 break;
1063         case REIPL_METHOD_CCW_DIAG:
1064                 diag308(DIAG308_SET, reipl_block_ccw);
1065                 diag308(DIAG308_LOAD_CLEAR, NULL);
1066                 break;
1067         case REIPL_METHOD_FCP_RW_DIAG:
1068                 diag308(DIAG308_SET, reipl_block_fcp);
1069                 diag308(DIAG308_LOAD_CLEAR, NULL);
1070                 break;
1071         case REIPL_METHOD_FCP_RO_DIAG:
1072                 diag308(DIAG308_LOAD_CLEAR, NULL);
1073                 break;
1074         case REIPL_METHOD_FCP_RO_VM:
1075                 __cpcmd("IPL", NULL, 0, NULL);
1076                 break;
1077         case REIPL_METHOD_NSS_DIAG:
1078                 diag308(DIAG308_SET, reipl_block_nss);
1079                 diag308(DIAG308_LOAD_CLEAR, NULL);
1080                 break;
1081         case REIPL_METHOD_NSS:
1082                 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
1083                 __cpcmd(buf, NULL, 0, NULL);
1084                 break;
1085         case REIPL_METHOD_DEFAULT:
1086                 if (MACHINE_IS_VM)
1087                         __cpcmd("IPL", NULL, 0, NULL);
1088                 diag308(DIAG308_LOAD_CLEAR, NULL);
1089                 break;
1090         case REIPL_METHOD_FCP_DUMP:
1091                 break;
1092         }
1093         disabled_wait((unsigned long) __builtin_return_address(0));
1094 }
1095
1096 static void reipl_run(struct shutdown_trigger *trigger)
1097 {
1098         smp_call_ipl_cpu(__reipl_run, NULL);
1099 }
1100
1101 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
1102 {
1103         ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
1104         ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1105         ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1106         ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1107 }
1108
1109 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1110 {
1111         /* LOADPARM */
1112         /* check if read scp info worked and set loadparm */
1113         if (sclp_ipl_info.is_valid)
1114                 memcpy(ipb->hdr.loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
1115         else
1116                 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1117                 memset(ipb->hdr.loadparm, 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         reipl_capabilities |= IPL_TYPE_NSS;
1152         return 0;
1153 }
1154
1155 static int __init reipl_ccw_init(void)
1156 {
1157         int rc;
1158
1159         reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1160         if (!reipl_block_ccw)
1161                 return -ENOMEM;
1162
1163         if (MACHINE_IS_VM) {
1164                 if (!diag308_set_works)
1165                         sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
1166                 rc = sysfs_create_group(&reipl_kset->kobj,
1167                                         &reipl_ccw_attr_group_vm);
1168         } else {
1169                 if(!diag308_set_works)
1170                         sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
1171                 rc = sysfs_create_group(&reipl_kset->kobj,
1172                                         &reipl_ccw_attr_group_lpar);
1173         }
1174         if (rc)
1175                 return rc;
1176
1177         reipl_block_ccw_init(reipl_block_ccw);
1178         if (ipl_info.type == IPL_TYPE_CCW) {
1179                 reipl_block_ccw->ipl_info.ccw.ssid = ipl_ssid;
1180                 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
1181                 reipl_block_ccw_fill_parms(reipl_block_ccw);
1182         }
1183
1184         reipl_capabilities |= IPL_TYPE_CCW;
1185         return 0;
1186 }
1187
1188 static int __init reipl_fcp_init(void)
1189 {
1190         int rc;
1191
1192         if (!diag308_set_works) {
1193                 if (ipl_info.type == IPL_TYPE_FCP) {
1194                         make_attrs_ro(reipl_fcp_attrs);
1195                         sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO;
1196                 } else
1197                         return 0;
1198         }
1199
1200         reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1201         if (!reipl_block_fcp)
1202                 return -ENOMEM;
1203
1204         /* sysfs: create fcp kset for mixing attr group and bin attrs */
1205         reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1206                                              &reipl_kset->kobj);
1207         if (!reipl_fcp_kset) {
1208                 free_page((unsigned long) reipl_block_fcp);
1209                 return -ENOMEM;
1210         }
1211
1212         rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1213         if (rc) {
1214                 kset_unregister(reipl_fcp_kset);
1215                 free_page((unsigned long) reipl_block_fcp);
1216                 return rc;
1217         }
1218
1219         if (ipl_info.type == IPL_TYPE_FCP) {
1220                 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
1221                 /*
1222                  * Fix loadparm: There are systems where the (SCSI) LOADPARM
1223                  * is invalid in the SCSI IPL parameter block, so take it
1224                  * always from sclp_ipl_info.
1225                  */
1226                 memcpy(reipl_block_fcp->hdr.loadparm, sclp_ipl_info.loadparm,
1227                        LOADPARM_LEN);
1228         } else {
1229                 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1230                 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1231                 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1232                 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1233                 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1234         }
1235         reipl_capabilities |= IPL_TYPE_FCP;
1236         return 0;
1237 }
1238
1239 static int __init reipl_type_init(void)
1240 {
1241         enum ipl_type reipl_type = ipl_info.type;
1242         struct ipl_parameter_block *reipl_block;
1243         unsigned long size;
1244
1245         reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size);
1246         if (!reipl_block)
1247                 goto out;
1248         /*
1249          * If we have an OS info reipl block, this will be used
1250          */
1251         if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_FCP) {
1252                 memcpy(reipl_block_fcp, reipl_block, size);
1253                 reipl_type = IPL_TYPE_FCP;
1254         } else if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_CCW) {
1255                 memcpy(reipl_block_ccw, reipl_block, size);
1256                 reipl_type = IPL_TYPE_CCW;
1257         }
1258 out:
1259         return reipl_set_type(reipl_type);
1260 }
1261
1262 static int __init reipl_init(void)
1263 {
1264         int rc;
1265
1266         reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1267         if (!reipl_kset)
1268                 return -ENOMEM;
1269         rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1270         if (rc) {
1271                 kset_unregister(reipl_kset);
1272                 return rc;
1273         }
1274         rc = reipl_ccw_init();
1275         if (rc)
1276                 return rc;
1277         rc = reipl_fcp_init();
1278         if (rc)
1279                 return rc;
1280         rc = reipl_nss_init();
1281         if (rc)
1282                 return rc;
1283         return reipl_type_init();
1284 }
1285
1286 static struct shutdown_action __refdata reipl_action = {
1287         .name   = SHUTDOWN_ACTION_REIPL_STR,
1288         .fn     = reipl_run,
1289         .init   = reipl_init,
1290 };
1291
1292 /*
1293  * dump shutdown action: Dump Linux on shutdown.
1294  */
1295
1296 /* FCP dump device attributes */
1297
1298 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n",
1299                    dump_block_fcp->ipl_info.fcp.wwpn);
1300 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n",
1301                    dump_block_fcp->ipl_info.fcp.lun);
1302 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1303                    dump_block_fcp->ipl_info.fcp.bootprog);
1304 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1305                    dump_block_fcp->ipl_info.fcp.br_lba);
1306 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1307                    dump_block_fcp->ipl_info.fcp.devno);
1308
1309 static struct attribute *dump_fcp_attrs[] = {
1310         &sys_dump_fcp_device_attr.attr,
1311         &sys_dump_fcp_wwpn_attr.attr,
1312         &sys_dump_fcp_lun_attr.attr,
1313         &sys_dump_fcp_bootprog_attr.attr,
1314         &sys_dump_fcp_br_lba_attr.attr,
1315         NULL,
1316 };
1317
1318 static struct attribute_group dump_fcp_attr_group = {
1319         .name  = IPL_FCP_STR,
1320         .attrs = dump_fcp_attrs,
1321 };
1322
1323 /* CCW dump device attributes */
1324 DEFINE_IPL_CCW_ATTR_RW(dump_ccw, device, dump_block_ccw->ipl_info.ccw);
1325
1326 static struct attribute *dump_ccw_attrs[] = {
1327         &sys_dump_ccw_device_attr.attr,
1328         NULL,
1329 };
1330
1331 static struct attribute_group dump_ccw_attr_group = {
1332         .name  = IPL_CCW_STR,
1333         .attrs = dump_ccw_attrs,
1334 };
1335
1336 /* dump type */
1337
1338 static int dump_set_type(enum dump_type type)
1339 {
1340         if (!(dump_capabilities & type))
1341                 return -EINVAL;
1342         switch (type) {
1343         case DUMP_TYPE_CCW:
1344                 if (diag308_set_works)
1345                         dump_method = DUMP_METHOD_CCW_DIAG;
1346                 else if (MACHINE_IS_VM)
1347                         dump_method = DUMP_METHOD_CCW_VM;
1348                 else
1349                         dump_method = DUMP_METHOD_CCW_CIO;
1350                 break;
1351         case DUMP_TYPE_FCP:
1352                 dump_method = DUMP_METHOD_FCP_DIAG;
1353                 break;
1354         default:
1355                 dump_method = DUMP_METHOD_NONE;
1356         }
1357         dump_type = type;
1358         return 0;
1359 }
1360
1361 static ssize_t dump_type_show(struct kobject *kobj,
1362                               struct kobj_attribute *attr, char *page)
1363 {
1364         return sprintf(page, "%s\n", dump_type_str(dump_type));
1365 }
1366
1367 static ssize_t dump_type_store(struct kobject *kobj,
1368                                struct kobj_attribute *attr,
1369                                const char *buf, size_t len)
1370 {
1371         int rc = -EINVAL;
1372
1373         if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1374                 rc = dump_set_type(DUMP_TYPE_NONE);
1375         else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1376                 rc = dump_set_type(DUMP_TYPE_CCW);
1377         else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1378                 rc = dump_set_type(DUMP_TYPE_FCP);
1379         return (rc != 0) ? rc : len;
1380 }
1381
1382 static struct kobj_attribute dump_type_attr =
1383         __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1384
1385 static struct kset *dump_kset;
1386
1387 static void diag308_dump(void *dump_block)
1388 {
1389         diag308(DIAG308_SET, dump_block);
1390         while (1) {
1391                 if (diag308(DIAG308_LOAD_NORMAL_DUMP, NULL) != 0x302)
1392                         break;
1393                 udelay_simple(USEC_PER_SEC);
1394         }
1395 }
1396
1397 static void __dump_run(void *unused)
1398 {
1399         struct ccw_dev_id devid;
1400         static char buf[100];
1401
1402         switch (dump_method) {
1403         case DUMP_METHOD_CCW_CIO:
1404                 devid.ssid  = dump_block_ccw->ipl_info.ccw.ssid;
1405                 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
1406                 reipl_ccw_dev(&devid);
1407                 break;
1408         case DUMP_METHOD_CCW_VM:
1409                 sprintf(buf, "STORE STATUS");
1410                 __cpcmd(buf, NULL, 0, NULL);
1411                 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
1412                 __cpcmd(buf, NULL, 0, NULL);
1413                 break;
1414         case DUMP_METHOD_CCW_DIAG:
1415                 diag308_dump(dump_block_ccw);
1416                 break;
1417         case DUMP_METHOD_FCP_DIAG:
1418                 diag308_dump(dump_block_fcp);
1419                 break;
1420         default:
1421                 break;
1422         }
1423 }
1424
1425 static void dump_run(struct shutdown_trigger *trigger)
1426 {
1427         if (dump_method == DUMP_METHOD_NONE)
1428                 return;
1429         smp_send_stop();
1430         smp_call_ipl_cpu(__dump_run, NULL);
1431 }
1432
1433 static int __init dump_ccw_init(void)
1434 {
1435         int rc;
1436
1437         dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1438         if (!dump_block_ccw)
1439                 return -ENOMEM;
1440         rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1441         if (rc) {
1442                 free_page((unsigned long)dump_block_ccw);
1443                 return rc;
1444         }
1445         dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1446         dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1447         dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1448         dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1449         dump_capabilities |= DUMP_TYPE_CCW;
1450         return 0;
1451 }
1452
1453 static int __init dump_fcp_init(void)
1454 {
1455         int rc;
1456
1457         if (!sclp_ipl_info.has_dump)
1458                 return 0; /* LDIPL DUMP is not installed */
1459         if (!diag308_set_works)
1460                 return 0;
1461         dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1462         if (!dump_block_fcp)
1463                 return -ENOMEM;
1464         rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1465         if (rc) {
1466                 free_page((unsigned long)dump_block_fcp);
1467                 return rc;
1468         }
1469         dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1470         dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1471         dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1472         dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1473         dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1474         dump_capabilities |= DUMP_TYPE_FCP;
1475         return 0;
1476 }
1477
1478 static int __init dump_init(void)
1479 {
1480         int rc;
1481
1482         dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1483         if (!dump_kset)
1484                 return -ENOMEM;
1485         rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1486         if (rc) {
1487                 kset_unregister(dump_kset);
1488                 return rc;
1489         }
1490         rc = dump_ccw_init();
1491         if (rc)
1492                 return rc;
1493         rc = dump_fcp_init();
1494         if (rc)
1495                 return rc;
1496         dump_set_type(DUMP_TYPE_NONE);
1497         return 0;
1498 }
1499
1500 static struct shutdown_action __refdata dump_action = {
1501         .name   = SHUTDOWN_ACTION_DUMP_STR,
1502         .fn     = dump_run,
1503         .init   = dump_init,
1504 };
1505
1506 static void dump_reipl_run(struct shutdown_trigger *trigger)
1507 {
1508         unsigned long ipib = (unsigned long) reipl_block_actual;
1509         unsigned int csum;
1510
1511         csum = (__force unsigned int)
1512                csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
1513         mem_assign_absolute(S390_lowcore.ipib, ipib);
1514         mem_assign_absolute(S390_lowcore.ipib_checksum, csum);
1515         dump_run(trigger);
1516 }
1517
1518 static int __init dump_reipl_init(void)
1519 {
1520         if (!diag308_set_works)
1521                 return -EOPNOTSUPP;
1522         else
1523                 return 0;
1524 }
1525
1526 static struct shutdown_action __refdata dump_reipl_action = {
1527         .name   = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1528         .fn     = dump_reipl_run,
1529         .init   = dump_reipl_init,
1530 };
1531
1532 /*
1533  * vmcmd shutdown action: Trigger vm command on shutdown.
1534  */
1535
1536 static char vmcmd_on_reboot[128];
1537 static char vmcmd_on_panic[128];
1538 static char vmcmd_on_halt[128];
1539 static char vmcmd_on_poff[128];
1540 static char vmcmd_on_restart[128];
1541
1542 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1543 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1544 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1545 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1546 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1547
1548 static struct attribute *vmcmd_attrs[] = {
1549         &sys_vmcmd_on_reboot_attr.attr,
1550         &sys_vmcmd_on_panic_attr.attr,
1551         &sys_vmcmd_on_halt_attr.attr,
1552         &sys_vmcmd_on_poff_attr.attr,
1553         &sys_vmcmd_on_restart_attr.attr,
1554         NULL,
1555 };
1556
1557 static struct attribute_group vmcmd_attr_group = {
1558         .attrs = vmcmd_attrs,
1559 };
1560
1561 static struct kset *vmcmd_kset;
1562
1563 static void vmcmd_run(struct shutdown_trigger *trigger)
1564 {
1565         char *cmd;
1566
1567         if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1568                 cmd = vmcmd_on_reboot;
1569         else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1570                 cmd = vmcmd_on_panic;
1571         else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1572                 cmd = vmcmd_on_halt;
1573         else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1574                 cmd = vmcmd_on_poff;
1575         else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
1576                 cmd = vmcmd_on_restart;
1577         else
1578                 return;
1579
1580         if (strlen(cmd) == 0)
1581                 return;
1582         __cpcmd(cmd, NULL, 0, NULL);
1583 }
1584
1585 static int vmcmd_init(void)
1586 {
1587         if (!MACHINE_IS_VM)
1588                 return -EOPNOTSUPP;
1589         vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1590         if (!vmcmd_kset)
1591                 return -ENOMEM;
1592         return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1593 }
1594
1595 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1596                                               vmcmd_run, vmcmd_init};
1597
1598 /*
1599  * stop shutdown action: Stop Linux on shutdown.
1600  */
1601
1602 static void stop_run(struct shutdown_trigger *trigger)
1603 {
1604         if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
1605             strcmp(trigger->name, ON_RESTART_STR) == 0)
1606                 disabled_wait((unsigned long) __builtin_return_address(0));
1607         smp_stop_cpu();
1608 }
1609
1610 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1611                                              stop_run, NULL};
1612
1613 /* action list */
1614
1615 static struct shutdown_action *shutdown_actions_list[] = {
1616         &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1617         &vmcmd_action, &stop_action};
1618 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1619
1620 /*
1621  * Trigger section
1622  */
1623
1624 static struct kset *shutdown_actions_kset;
1625
1626 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1627                        size_t len)
1628 {
1629         int i;
1630
1631         for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1632                 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1633                         if (shutdown_actions_list[i]->init_rc) {
1634                                 return shutdown_actions_list[i]->init_rc;
1635                         } else {
1636                                 trigger->action = shutdown_actions_list[i];
1637                                 return len;
1638                         }
1639                 }
1640         }
1641         return -EINVAL;
1642 }
1643
1644 /* on reipl */
1645
1646 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1647                                                     &reipl_action};
1648
1649 static ssize_t on_reboot_show(struct kobject *kobj,
1650                               struct kobj_attribute *attr, char *page)
1651 {
1652         return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1653 }
1654
1655 static ssize_t on_reboot_store(struct kobject *kobj,
1656                                struct kobj_attribute *attr,
1657                                const char *buf, size_t len)
1658 {
1659         return set_trigger(buf, &on_reboot_trigger, len);
1660 }
1661 static struct kobj_attribute on_reboot_attr = __ATTR_RW(on_reboot);
1662
1663 static void do_machine_restart(char *__unused)
1664 {
1665         smp_send_stop();
1666         on_reboot_trigger.action->fn(&on_reboot_trigger);
1667         reipl_run(NULL);
1668 }
1669 void (*_machine_restart)(char *command) = do_machine_restart;
1670
1671 /* on panic */
1672
1673 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1674
1675 static ssize_t on_panic_show(struct kobject *kobj,
1676                              struct kobj_attribute *attr, char *page)
1677 {
1678         return sprintf(page, "%s\n", on_panic_trigger.action->name);
1679 }
1680
1681 static ssize_t on_panic_store(struct kobject *kobj,
1682                               struct kobj_attribute *attr,
1683                               const char *buf, size_t len)
1684 {
1685         return set_trigger(buf, &on_panic_trigger, len);
1686 }
1687 static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic);
1688
1689 static void do_panic(void)
1690 {
1691         lgr_info_log();
1692         on_panic_trigger.action->fn(&on_panic_trigger);
1693         stop_run(&on_panic_trigger);
1694 }
1695
1696 /* on restart */
1697
1698 static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
1699         &stop_action};
1700
1701 static ssize_t on_restart_show(struct kobject *kobj,
1702                                struct kobj_attribute *attr, char *page)
1703 {
1704         return sprintf(page, "%s\n", on_restart_trigger.action->name);
1705 }
1706
1707 static ssize_t on_restart_store(struct kobject *kobj,
1708                                 struct kobj_attribute *attr,
1709                                 const char *buf, size_t len)
1710 {
1711         return set_trigger(buf, &on_restart_trigger, len);
1712 }
1713 static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart);
1714
1715 static void __do_restart(void *ignore)
1716 {
1717         __arch_local_irq_stosm(0x04); /* enable DAT */
1718         smp_send_stop();
1719 #ifdef CONFIG_CRASH_DUMP
1720         crash_kexec(NULL);
1721 #endif
1722         on_restart_trigger.action->fn(&on_restart_trigger);
1723         stop_run(&on_restart_trigger);
1724 }
1725
1726 void do_restart(void)
1727 {
1728         tracing_off();
1729         debug_locks_off();
1730         lgr_info_log();
1731         smp_call_online_cpu(__do_restart, NULL);
1732 }
1733
1734 /* on halt */
1735
1736 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1737
1738 static ssize_t on_halt_show(struct kobject *kobj,
1739                             struct kobj_attribute *attr, char *page)
1740 {
1741         return sprintf(page, "%s\n", on_halt_trigger.action->name);
1742 }
1743
1744 static ssize_t on_halt_store(struct kobject *kobj,
1745                              struct kobj_attribute *attr,
1746                              const char *buf, size_t len)
1747 {
1748         return set_trigger(buf, &on_halt_trigger, len);
1749 }
1750 static struct kobj_attribute on_halt_attr = __ATTR_RW(on_halt);
1751
1752 static void do_machine_halt(void)
1753 {
1754         smp_send_stop();
1755         on_halt_trigger.action->fn(&on_halt_trigger);
1756         stop_run(&on_halt_trigger);
1757 }
1758 void (*_machine_halt)(void) = do_machine_halt;
1759
1760 /* on power off */
1761
1762 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1763
1764 static ssize_t on_poff_show(struct kobject *kobj,
1765                             struct kobj_attribute *attr, char *page)
1766 {
1767         return sprintf(page, "%s\n", on_poff_trigger.action->name);
1768 }
1769
1770 static ssize_t on_poff_store(struct kobject *kobj,
1771                              struct kobj_attribute *attr,
1772                              const char *buf, size_t len)
1773 {
1774         return set_trigger(buf, &on_poff_trigger, len);
1775 }
1776 static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff);
1777
1778 static void do_machine_power_off(void)
1779 {
1780         smp_send_stop();
1781         on_poff_trigger.action->fn(&on_poff_trigger);
1782         stop_run(&on_poff_trigger);
1783 }
1784 void (*_machine_power_off)(void) = do_machine_power_off;
1785
1786 static struct attribute *shutdown_action_attrs[] = {
1787         &on_restart_attr.attr,
1788         &on_reboot_attr.attr,
1789         &on_panic_attr.attr,
1790         &on_halt_attr.attr,
1791         &on_poff_attr.attr,
1792         NULL,
1793 };
1794
1795 static struct attribute_group shutdown_action_attr_group = {
1796         .attrs = shutdown_action_attrs,
1797 };
1798
1799 static void __init shutdown_triggers_init(void)
1800 {
1801         shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1802                                                     firmware_kobj);
1803         if (!shutdown_actions_kset)
1804                 goto fail;
1805         if (sysfs_create_group(&shutdown_actions_kset->kobj,
1806                                &shutdown_action_attr_group))
1807                 goto fail;
1808         return;
1809 fail:
1810         panic("shutdown_triggers_init failed\n");
1811 }
1812
1813 static void __init shutdown_actions_init(void)
1814 {
1815         int i;
1816
1817         for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1818                 if (!shutdown_actions_list[i]->init)
1819                         continue;
1820                 shutdown_actions_list[i]->init_rc =
1821                         shutdown_actions_list[i]->init();
1822         }
1823 }
1824
1825 static int __init s390_ipl_init(void)
1826 {
1827         char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40};
1828
1829         sclp_early_get_ipl_info(&sclp_ipl_info);
1830         /*
1831          * Fix loadparm: There are systems where the (SCSI) LOADPARM
1832          * returned by read SCP info is invalid (contains EBCDIC blanks)
1833          * when the system has been booted via diag308. In that case we use
1834          * the value from diag308, if available.
1835          *
1836          * There are also systems where diag308 store does not work in
1837          * case the system is booted from HMC. Fortunately in this case
1838          * READ SCP info provides the correct value.
1839          */
1840         if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 &&
1841             diag308_set_works)
1842                 memcpy(sclp_ipl_info.loadparm, ipl_block.hdr.loadparm,
1843                        LOADPARM_LEN);
1844         shutdown_actions_init();
1845         shutdown_triggers_init();
1846         return 0;
1847 }
1848
1849 __initcall(s390_ipl_init);
1850
1851 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1852 {
1853         int sx, dx;
1854
1855         dx = 0;
1856         for (sx = 0; src[sx] != 0; sx++) {
1857                 if (src[sx] == '"')
1858                         continue;
1859                 dst[dx++] = src[sx];
1860                 if (dx >= n)
1861                         break;
1862         }
1863 }
1864
1865 static int __init vmcmd_on_reboot_setup(char *str)
1866 {
1867         if (!MACHINE_IS_VM)
1868                 return 1;
1869         strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1870         vmcmd_on_reboot[127] = 0;
1871         on_reboot_trigger.action = &vmcmd_action;
1872         return 1;
1873 }
1874 __setup("vmreboot=", vmcmd_on_reboot_setup);
1875
1876 static int __init vmcmd_on_panic_setup(char *str)
1877 {
1878         if (!MACHINE_IS_VM)
1879                 return 1;
1880         strncpy_skip_quote(vmcmd_on_panic, str, 127);
1881         vmcmd_on_panic[127] = 0;
1882         on_panic_trigger.action = &vmcmd_action;
1883         return 1;
1884 }
1885 __setup("vmpanic=", vmcmd_on_panic_setup);
1886
1887 static int __init vmcmd_on_halt_setup(char *str)
1888 {
1889         if (!MACHINE_IS_VM)
1890                 return 1;
1891         strncpy_skip_quote(vmcmd_on_halt, str, 127);
1892         vmcmd_on_halt[127] = 0;
1893         on_halt_trigger.action = &vmcmd_action;
1894         return 1;
1895 }
1896 __setup("vmhalt=", vmcmd_on_halt_setup);
1897
1898 static int __init vmcmd_on_poff_setup(char *str)
1899 {
1900         if (!MACHINE_IS_VM)
1901                 return 1;
1902         strncpy_skip_quote(vmcmd_on_poff, str, 127);
1903         vmcmd_on_poff[127] = 0;
1904         on_poff_trigger.action = &vmcmd_action;
1905         return 1;
1906 }
1907 __setup("vmpoff=", vmcmd_on_poff_setup);
1908
1909 static int on_panic_notify(struct notifier_block *self,
1910                            unsigned long event, void *data)
1911 {
1912         do_panic();
1913         return NOTIFY_OK;
1914 }
1915
1916 static struct notifier_block on_panic_nb = {
1917         .notifier_call = on_panic_notify,
1918         .priority = INT_MIN,
1919 };
1920
1921 void __init setup_ipl(void)
1922 {
1923         ipl_info.type = get_ipl_type();
1924         switch (ipl_info.type) {
1925         case IPL_TYPE_CCW:
1926                 ipl_info.data.ccw.dev_id.ssid = ipl_ssid;
1927                 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1928                 break;
1929         case IPL_TYPE_FCP:
1930         case IPL_TYPE_FCP_DUMP:
1931                 ipl_info.data.fcp.dev_id.ssid = 0;
1932                 ipl_info.data.fcp.dev_id.devno =
1933                         IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1934                 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1935                 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1936                 break;
1937         case IPL_TYPE_NSS:
1938         case IPL_TYPE_UNKNOWN:
1939                 /* We have no info to copy */
1940                 break;
1941         }
1942         atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1943 }
1944
1945 void __init ipl_update_parameters(void)
1946 {
1947         int rc;
1948
1949         rc = diag308(DIAG308_STORE, &ipl_block);
1950         if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
1951                 diag308_set_works = 1;
1952 }
1953
1954 void __init ipl_verify_parameters(void)
1955 {
1956         struct cio_iplinfo iplinfo;
1957
1958         if (cio_get_iplinfo(&iplinfo))
1959                 return;
1960
1961         ipl_ssid = iplinfo.ssid;
1962         ipl_devno = iplinfo.devno;
1963         ipl_flags |= IPL_DEVNO_VALID;
1964         if (!iplinfo.is_qdio)
1965                 return;
1966         ipl_flags |= IPL_PARMBLOCK_VALID;
1967 }
1968
1969 static LIST_HEAD(rcall);
1970 static DEFINE_MUTEX(rcall_mutex);
1971
1972 void register_reset_call(struct reset_call *reset)
1973 {
1974         mutex_lock(&rcall_mutex);
1975         list_add(&reset->list, &rcall);
1976         mutex_unlock(&rcall_mutex);
1977 }
1978 EXPORT_SYMBOL_GPL(register_reset_call);
1979
1980 void unregister_reset_call(struct reset_call *reset)
1981 {
1982         mutex_lock(&rcall_mutex);
1983         list_del(&reset->list);
1984         mutex_unlock(&rcall_mutex);
1985 }
1986 EXPORT_SYMBOL_GPL(unregister_reset_call);
1987
1988 static void do_reset_calls(void)
1989 {
1990         struct reset_call *reset;
1991
1992         if (diag308_set_works) {
1993                 diag308_reset();
1994                 return;
1995         }
1996         list_for_each_entry(reset, &rcall, list)
1997                 reset->fn();
1998 }
1999
2000 void s390_reset_system(void)
2001 {
2002         struct lowcore *lc;
2003
2004         lc = (struct lowcore *)(unsigned long) store_prefix();
2005
2006         /* Stack for interrupt/machine check handler */
2007         lc->panic_stack = S390_lowcore.panic_stack;
2008
2009         /* Disable prefixing */
2010         set_prefix(0);
2011
2012         /* Disable lowcore protection */
2013         __ctl_clear_bit(0,28);
2014
2015         /* Set new machine check handler */
2016         S390_lowcore.mcck_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
2017         S390_lowcore.mcck_new_psw.addr =
2018                 (unsigned long) s390_base_mcck_handler;
2019
2020         /* Set new program check handler */
2021         S390_lowcore.program_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
2022         S390_lowcore.program_new_psw.addr =
2023                 (unsigned long) s390_base_pgm_handler;
2024
2025         do_reset_calls();
2026 }