arch/s390/kernel/ipl.c

   1 /*
   2  *    ipl/reipl/dump support for Linux on s390.
   3  *
   4  *    Copyright IBM Corp. 2005, 2012
   5  *    Author(s): Michael Holzheu <holzheu@de.ibm.com>
   6  *               Heiko Carstens <heiko.carstens@de.ibm.com>
   7  *               Volker Sameske <sameske@de.ibm.com>
   8  */
   9
  10 #include <linux/types.h>
  11 #include <linux/export.h>
  12 #include <linux/init.h>
  13 #include <linux/device.h>
  14 #include <linux/delay.h>
  15 #include <linux/reboot.h>
  16 #include <linux/ctype.h>
  17 #include <linux/fs.h>
  18 #include <linux/gfp.h>
  19 #include <linux/crash_dump.h>
  20 #include <linux/debug_locks.h>
  21 #include <asm/diag.h>
  22 #include <asm/ipl.h>
  23 #include <asm/smp.h>
  24 #include <asm/setup.h>
  25 #include <asm/cpcmd.h>
  26 #include <asm/cio.h>
  27 #include <asm/ebcdic.h>
  28 #include <asm/reset.h>
  29 #include <asm/sclp.h>
  30 #include <asm/checksum.h>
  31 #include <asm/debug.h>
  32 #include <asm/os_info.h>
  33 #include "entry.h"
  34
  35 #define IPL_PARM_BLOCK_VERSION 0
  36
  37 #define IPL_UNKNOWN_STR         "unknown"
  38 #define IPL_CCW_STR             "ccw"
  39 #define IPL_FCP_STR             "fcp"
  40 #define IPL_FCP_DUMP_STR        "fcp_dump"
  41 #define IPL_NSS_STR             "nss"
  42
  43 #define DUMP_CCW_STR            "ccw"
  44 #define DUMP_FCP_STR            "fcp"
  45 #define DUMP_NONE_STR           "none"
  46
  47 /*
  48  * Four shutdown trigger types are supported:
  49  * - panic
  50  * - halt
  51  * - power off
  52  * - reipl
  53  * - restart
  54  */
  55 #define ON_PANIC_STR            "on_panic"
  56 #define ON_HALT_STR             "on_halt"
  57 #define ON_POFF_STR             "on_poff"
  58 #define ON_REIPL_STR            "on_reboot"
  59 #define ON_RESTART_STR          "on_restart"
  60
  61 struct shutdown_action;
  62 struct shutdown_trigger {
  63         char *name;
  64         struct shutdown_action *action;
  65 };
  66
  67 /*
  68  * The following shutdown action types are supported:
  69  */
  70 #define SHUTDOWN_ACTION_IPL_STR         "ipl"
  71 #define SHUTDOWN_ACTION_REIPL_STR       "reipl"
  72 #define SHUTDOWN_ACTION_DUMP_STR        "dump"
  73 #define SHUTDOWN_ACTION_VMCMD_STR       "vmcmd"
  74 #define SHUTDOWN_ACTION_STOP_STR        "stop"
  75 #define SHUTDOWN_ACTION_DUMP_REIPL_STR  "dump_reipl"
  76
  77 struct shutdown_action {
  78         char *name;
  79         void (*fn) (struct shutdown_trigger *trigger);
  80         int (*init) (void);
  81         int init_rc;
  82 };
  83
  84 static char *ipl_type_str(enum ipl_type type)
  85 {
  86         switch (type) {
  87         case IPL_TYPE_CCW:
  88                 return IPL_CCW_STR;
  89         case IPL_TYPE_FCP:
  90                 return IPL_FCP_STR;
  91         case IPL_TYPE_FCP_DUMP:
  92                 return IPL_FCP_DUMP_STR;
  93         case IPL_TYPE_NSS:
  94                 return IPL_NSS_STR;
  95         case IPL_TYPE_UNKNOWN:
  96         default:
  97                 return IPL_UNKNOWN_STR;
  98         }
  99 }
 100
 101 enum dump_type {
 102         DUMP_TYPE_NONE  = 1,
 103         DUMP_TYPE_CCW   = 2,
 104         DUMP_TYPE_FCP   = 4,
 105 };
 106
 107 static char *dump_type_str(enum dump_type type)
 108 {
 109         switch (type) {
 110         case DUMP_TYPE_NONE:
 111                 return DUMP_NONE_STR;
 112         case DUMP_TYPE_CCW:
 113                 return DUMP_CCW_STR;
 114         case DUMP_TYPE_FCP:
 115                 return DUMP_FCP_STR;
 116         default:
 117                 return NULL;
 118         }
 119 }
 120
 121 /*
 122  * Must be in data section since the bss section
 123  * is not cleared when these are accessed.
 124  */
 125 static u8 ipl_ssid __section(.data) = 0;
 126 static u16 ipl_devno __section(.data) = 0;
 127 u32 ipl_flags __section(.data) = 0;
 128
 129 enum ipl_method {
 130         REIPL_METHOD_CCW_CIO,
 131         REIPL_METHOD_CCW_DIAG,
 132         REIPL_METHOD_CCW_VM,
 133         REIPL_METHOD_FCP_RO_DIAG,
 134         REIPL_METHOD_FCP_RW_DIAG,
 135         REIPL_METHOD_FCP_RO_VM,
 136         REIPL_METHOD_FCP_DUMP,
 137         REIPL_METHOD_NSS,
 138         REIPL_METHOD_NSS_DIAG,
 139         REIPL_METHOD_DEFAULT,
 140 };
 141
 142 enum dump_method {
 143         DUMP_METHOD_NONE,
 144         DUMP_METHOD_CCW_CIO,
 145         DUMP_METHOD_CCW_DIAG,
 146         DUMP_METHOD_CCW_VM,
 147         DUMP_METHOD_FCP_DIAG,
 148 };
 149
 150 static int diag308_set_works = 0;
 151
 152 static struct ipl_parameter_block ipl_block;
 153
 154 static int reipl_capabilities = IPL_TYPE_UNKNOWN;
 155
 156 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
 157 static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
 158 static struct ipl_parameter_block *reipl_block_fcp;
 159 static struct ipl_parameter_block *reipl_block_ccw;
 160 static struct ipl_parameter_block *reipl_block_nss;
 161 static struct ipl_parameter_block *reipl_block_actual;
 162
 163 static int dump_capabilities = DUMP_TYPE_NONE;
 164 static enum dump_type dump_type = DUMP_TYPE_NONE;
 165 static enum dump_method dump_method = DUMP_METHOD_NONE;
 166 static struct ipl_parameter_block *dump_block_fcp;
 167 static struct ipl_parameter_block *dump_block_ccw;
 168
 169 static struct sclp_ipl_info sclp_ipl_info;
 170
 171 static inline int __diag308(unsigned long subcode, void *addr)
 172 {
 173         register unsigned long _addr asm("0") = (unsigned long) addr;
 174         register unsigned long _rc asm("1") = 0;
 175
 176         asm volatile(
 177                 "       diag    %0,%2,0x308\n"
 178                 "0:     nopr    %%r7\n"
 179                 EX_TABLE(0b,0b)
 180                 : "+d" (_addr), "+d" (_rc)
 181                 : "d" (subcode) : "cc", "memory");
 182         return _rc;
 183 }
 184
 185 int diag308(unsigned long subcode, void *addr)
 186 {
 187         diag_stat_inc(DIAG_STAT_X308);
 188         return __diag308(subcode, addr);
 189 }
 190 EXPORT_SYMBOL_GPL(diag308);
 191
 192 /* SYSFS */
 193
 194 #define IPL_ATTR_SHOW_FN(_prefix, _name, _format, args...)              \
 195 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,     \
 196                 struct kobj_attribute *attr,                            \
 197                 char *page)                                             \
 198 {                                                                       \
 199         return snprintf(page, PAGE_SIZE, _format, ##args);              \
 200 }
 201
 202 #define IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk)                 \
 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 ssid, devno;                                 \
 208                                                                         \
 209         if (sscanf(buf, "0.%llx.%llx\n", &ssid, &devno) != 2)           \
 210                 return -EINVAL;                                         \
 211                                                                         \
 212         if (ssid > __MAX_SSID || devno > __MAX_SUBCHANNEL)              \
 213                 return -EINVAL;                                         \
 214                                                                         \
 215         _ipl_blk.ssid = ssid;                                           \
 216         _ipl_blk.devno = devno;                                         \
 217         return len;                                                     \
 218 }
 219
 220 #define DEFINE_IPL_CCW_ATTR_RW(_prefix, _name, _ipl_blk)                \
 221 IPL_ATTR_SHOW_FN(_prefix, _name, "0.%x.%04x\n",                         \
 222                  _ipl_blk.ssid, _ipl_blk.devno);                        \
 223 IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk);                        \
 224 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 225         __ATTR(_name, (S_IRUGO | S_IWUSR),                              \
 226                sys_##_prefix##_##_name##_show,                          \
 227                sys_##_prefix##_##_name##_store)                         \
 228
 229 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value)             \
 230 IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value)                       \
 231 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 232         __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL)
 233
 234 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)   \
 235 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value) \
 236 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,    \
 237                 struct kobj_attribute *attr,                            \
 238                 const char *buf, size_t len)                            \
 239 {                                                                       \
 240         unsigned long long value;                                       \
 241         if (sscanf(buf, _fmt_in, &value) != 1)                          \
 242                 return -EINVAL;                                         \
 243         _value = value;                                                 \
 244         return len;                                                     \
 245 }                                                                       \
 246 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 247         __ATTR(_name,(S_IRUGO | S_IWUSR),                               \
 248                         sys_##_prefix##_##_name##_show,                 \
 249                         sys_##_prefix##_##_name##_store)
 250
 251 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
 252 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, _value)                      \
 253 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,    \
 254                 struct kobj_attribute *attr,                            \
 255                 const char *buf, size_t len)                            \
 256 {                                                                       \
 257         strncpy(_value, buf, sizeof(_value) - 1);                       \
 258         strim(_value);                                                  \
 259         return len;                                                     \
 260 }                                                                       \
 261 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 262         __ATTR(_name,(S_IRUGO | S_IWUSR),                               \
 263                         sys_##_prefix##_##_name##_show,                 \
 264                         sys_##_prefix##_##_name##_store)
 265
 266 static void make_attrs_ro(struct attribute **attrs)
 267 {
 268         while (*attrs) {
 269                 (*attrs)->mode = S_IRUGO;
 270                 attrs++;
 271         }
 272 }
 273
 274 /*
 275  * ipl section
 276  */
 277
 278 static __init enum ipl_type get_ipl_type(void)
 279 {
 280         struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
 281
 282         if (ipl_flags & IPL_NSS_VALID)
 283                 return IPL_TYPE_NSS;
 284         if (!(ipl_flags & IPL_DEVNO_VALID))
 285                 return IPL_TYPE_UNKNOWN;
 286         if (!(ipl_flags & IPL_PARMBLOCK_VALID))
 287                 return IPL_TYPE_CCW;
 288         if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
 289                 return IPL_TYPE_UNKNOWN;
 290         if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
 291                 return IPL_TYPE_UNKNOWN;
 292         if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
 293                 return IPL_TYPE_FCP_DUMP;
 294         return IPL_TYPE_FCP;
 295 }
 296
 297 struct ipl_info ipl_info;
 298 EXPORT_SYMBOL_GPL(ipl_info);
 299
 300 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
 301                              char *page)
 302 {
 303         return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
 304 }
 305
 306 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
 307
 308 /* VM IPL PARM routines */
 309 static size_t reipl_get_ascii_vmparm(char *dest, size_t size,
 310                                      const struct ipl_parameter_block *ipb)
 311 {
 312         int i;
 313         size_t len;
 314         char has_lowercase = 0;
 315
 316         len = 0;
 317         if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
 318             (ipb->ipl_info.ccw.vm_parm_len > 0)) {
 319
 320                 len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
 321                 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
 322                 /* If at least one character is lowercase, we assume mixed
 323                  * case; otherwise we convert everything to lowercase.
 324                  */
 325                 for (i = 0; i < len; i++)
 326                         if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
 327                             (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
 328                             (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
 329                                 has_lowercase = 1;
 330                                 break;
 331                         }
 332                 if (!has_lowercase)
 333                         EBC_TOLOWER(dest, len);
 334                 EBCASC(dest, len);
 335         }
 336         dest[len] = 0;
 337
 338         return len;
 339 }
 340
 341 size_t append_ipl_vmparm(char *dest, size_t size)
 342 {
 343         size_t rc;
 344
 345         rc = 0;
 346         if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
 347                 rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
 348         else
 349                 dest[0] = 0;
 350         return rc;
 351 }
 352
 353 static ssize_t ipl_vm_parm_show(struct kobject *kobj,
 354                                 struct kobj_attribute *attr, char *page)
 355 {
 356         char parm[DIAG308_VMPARM_SIZE + 1] = {};
 357
 358         append_ipl_vmparm(parm, sizeof(parm));
 359         return sprintf(page, "%s\n", parm);
 360 }
 361
 362 static size_t scpdata_length(const char* buf, size_t count)
 363 {
 364         while (count) {
 365                 if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
 366                         break;
 367                 count--;
 368         }
 369         return count;
 370 }
 371
 372 static size_t reipl_append_ascii_scpdata(char *dest, size_t size,
 373                                          const struct ipl_parameter_block *ipb)
 374 {
 375         size_t count;
 376         size_t i;
 377         int has_lowercase;
 378
 379         count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data,
 380                                              ipb->ipl_info.fcp.scp_data_len));
 381         if (!count)
 382                 goto out;
 383
 384         has_lowercase = 0;
 385         for (i = 0; i < count; i++) {
 386                 if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
 387                         count = 0;
 388                         goto out;
 389                 }
 390                 if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
 391                         has_lowercase = 1;
 392         }
 393
 394         if (has_lowercase)
 395                 memcpy(dest, ipb->ipl_info.fcp.scp_data, count);
 396         else
 397                 for (i = 0; i < count; i++)
 398                         dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]);
 399 out:
 400         dest[count] = '\0';
 401         return count;
 402 }
 403
 404 size_t append_ipl_scpdata(char *dest, size_t len)
 405 {
 406         size_t rc;
 407
 408         rc = 0;
 409         if (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP)
 410                 rc = reipl_append_ascii_scpdata(dest, len, &ipl_block);
 411         else
 412                 dest[0] = 0;
 413         return rc;
 414 }
 415
 416
 417 static struct kobj_attribute sys_ipl_vm_parm_attr =
 418         __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
 419
 420 static ssize_t sys_ipl_device_show(struct kobject *kobj,
 421                                    struct kobj_attribute *attr, char *page)
 422 {
 423         struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
 424
 425         switch (ipl_info.type) {
 426         case IPL_TYPE_CCW:
 427                 return sprintf(page, "0.%x.%04x\n", ipl_ssid, ipl_devno);
 428         case IPL_TYPE_FCP:
 429         case IPL_TYPE_FCP_DUMP:
 430                 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
 431         default:
 432                 return 0;
 433         }
 434 }
 435
 436 static struct kobj_attribute sys_ipl_device_attr =
 437         __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
 438
 439 static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
 440                                   struct bin_attribute *attr, char *buf,
 441                                   loff_t off, size_t count)
 442 {
 443         return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START,
 444                                         IPL_PARMBLOCK_SIZE);
 445 }
 446 static struct bin_attribute ipl_parameter_attr =
 447         __BIN_ATTR(binary_parameter, S_IRUGO, ipl_parameter_read, NULL,
 448                    PAGE_SIZE);
 449
 450 static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
 451                                  struct bin_attribute *attr, char *buf,
 452                                  loff_t off, size_t count)
 453 {
 454         unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
 455         void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
 456
 457         return memory_read_from_buffer(buf, count, &off, scp_data, size);
 458 }
 459 static struct bin_attribute ipl_scp_data_attr =
 460         __BIN_ATTR(scp_data, S_IRUGO, ipl_scp_data_read, NULL, PAGE_SIZE);
 461
 462 static struct bin_attribute *ipl_fcp_bin_attrs[] = {
 463         &ipl_parameter_attr,
 464         &ipl_scp_data_attr,
 465         NULL,
 466 };
 467
 468 /* FCP ipl device attributes */
 469
 470 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
 471                    IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
 472 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
 473                    IPL_PARMBLOCK_START->ipl_info.fcp.lun);
 474 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
 475                    IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
 476 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
 477                    IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
 478
 479 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
 480                                      struct kobj_attribute *attr, char *page)
 481 {
 482         char loadparm[LOADPARM_LEN + 1] = {};
 483
 484         if (!sclp_ipl_info.is_valid)
 485                 return sprintf(page, "#unknown#\n");
 486         memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
 487         EBCASC(loadparm, LOADPARM_LEN);
 488         strim(loadparm);
 489         return sprintf(page, "%s\n", loadparm);
 490 }
 491
 492 static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
 493         __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
 494
 495 static struct attribute *ipl_fcp_attrs[] = {
 496         &sys_ipl_type_attr.attr,
 497         &sys_ipl_device_attr.attr,
 498         &sys_ipl_fcp_wwpn_attr.attr,
 499         &sys_ipl_fcp_lun_attr.attr,
 500         &sys_ipl_fcp_bootprog_attr.attr,
 501         &sys_ipl_fcp_br_lba_attr.attr,
 502         &sys_ipl_ccw_loadparm_attr.attr,
 503         NULL,
 504 };
 505
 506 static struct attribute_group ipl_fcp_attr_group = {
 507         .attrs = ipl_fcp_attrs,
 508         .bin_attrs = ipl_fcp_bin_attrs,
 509 };
 510
 511 /* CCW ipl device attributes */
 512
 513 static struct attribute *ipl_ccw_attrs_vm[] = {
 514         &sys_ipl_type_attr.attr,
 515         &sys_ipl_device_attr.attr,
 516         &sys_ipl_ccw_loadparm_attr.attr,
 517         &sys_ipl_vm_parm_attr.attr,
 518         NULL,
 519 };
 520
 521 static struct attribute *ipl_ccw_attrs_lpar[] = {
 522         &sys_ipl_type_attr.attr,
 523         &sys_ipl_device_attr.attr,
 524         &sys_ipl_ccw_loadparm_attr.attr,
 525         NULL,
 526 };
 527
 528 static struct attribute_group ipl_ccw_attr_group_vm = {
 529         .attrs = ipl_ccw_attrs_vm,
 530 };
 531
 532 static struct attribute_group ipl_ccw_attr_group_lpar = {
 533         .attrs = ipl_ccw_attrs_lpar
 534 };
 535
 536 /* NSS ipl device attributes */
 537
 538 DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
 539
 540 static struct attribute *ipl_nss_attrs[] = {
 541         &sys_ipl_type_attr.attr,
 542         &sys_ipl_nss_name_attr.attr,
 543         &sys_ipl_ccw_loadparm_attr.attr,
 544         &sys_ipl_vm_parm_attr.attr,
 545         NULL,
 546 };
 547
 548 static struct attribute_group ipl_nss_attr_group = {
 549         .attrs = ipl_nss_attrs,
 550 };
 551
 552 /* UNKNOWN ipl device attributes */
 553
 554 static struct attribute *ipl_unknown_attrs[] = {
 555         &sys_ipl_type_attr.attr,
 556         NULL,
 557 };
 558
 559 static struct attribute_group ipl_unknown_attr_group = {
 560         .attrs = ipl_unknown_attrs,
 561 };
 562
 563 static struct kset *ipl_kset;
 564
 565 static void __ipl_run(void *unused)
 566 {
 567         __bpon();
 568         diag308(DIAG308_LOAD_CLEAR, NULL);
 569         if (MACHINE_IS_VM)
 570                 __cpcmd("IPL", NULL, 0, NULL);
 571         else if (ipl_info.type == IPL_TYPE_CCW)
 572                 reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
 573 }
 574
 575 static void ipl_run(struct shutdown_trigger *trigger)
 576 {
 577         smp_call_ipl_cpu(__ipl_run, NULL);
 578 }
 579
 580 static int __init ipl_init(void)
 581 {
 582         int rc;
 583
 584         ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
 585         if (!ipl_kset) {
 586                 rc = -ENOMEM;
 587                 goto out;
 588         }
 589         switch (ipl_info.type) {
 590         case IPL_TYPE_CCW:
 591                 if (MACHINE_IS_VM)
 592                         rc = sysfs_create_group(&ipl_kset->kobj,
 593                                                 &ipl_ccw_attr_group_vm);
 594                 else
 595                         rc = sysfs_create_group(&ipl_kset->kobj,
 596                                                 &ipl_ccw_attr_group_lpar);
 597                 break;
 598         case IPL_TYPE_FCP:
 599         case IPL_TYPE_FCP_DUMP:
 600                 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
 601                 break;
 602         case IPL_TYPE_NSS:
 603                 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group);
 604                 break;
 605         default:
 606                 rc = sysfs_create_group(&ipl_kset->kobj,
 607                                         &ipl_unknown_attr_group);
 608                 break;
 609         }
 610 out:
 611         if (rc)
 612                 panic("ipl_init failed: rc = %i\n", rc);
 613
 614         return 0;
 615 }
 616
 617 static struct shutdown_action __refdata ipl_action = {
 618         .name   = SHUTDOWN_ACTION_IPL_STR,
 619         .fn     = ipl_run,
 620         .init   = ipl_init,
 621 };
 622
 623 /*
 624  * reipl shutdown action: Reboot Linux on shutdown.
 625  */
 626
 627 /* VM IPL PARM attributes */
 628 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
 629                                           char *page)
 630 {
 631         char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
 632
 633         reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
 634         return sprintf(page, "%s\n", vmparm);
 635 }
 636
 637 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
 638                                           size_t vmparm_max,
 639                                           const char *buf, size_t len)
 640 {
 641         int i, ip_len;
 642
 643         /* ignore trailing newline */
 644         ip_len = len;
 645         if ((len > 0) && (buf[len - 1] == '\n'))
 646                 ip_len--;
 647
 648         if (ip_len > vmparm_max)
 649                 return -EINVAL;
 650
 651         /* parm is used to store kernel options, check for common chars */
 652         for (i = 0; i < ip_len; i++)
 653                 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
 654                         return -EINVAL;
 655
 656         memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
 657         ipb->ipl_info.ccw.vm_parm_len = ip_len;
 658         if (ip_len > 0) {
 659                 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
 660                 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
 661                 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
 662         } else {
 663                 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
 664         }
 665
 666         return len;
 667 }
 668
 669 /* NSS wrapper */
 670 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
 671                                      struct kobj_attribute *attr, char *page)
 672 {
 673         return reipl_generic_vmparm_show(reipl_block_nss, page);
 674 }
 675
 676 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
 677                                       struct kobj_attribute *attr,
 678                                       const char *buf, size_t len)
 679 {
 680         return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
 681 }
 682
 683 /* CCW wrapper */
 684 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
 685                                      struct kobj_attribute *attr, char *page)
 686 {
 687         return reipl_generic_vmparm_show(reipl_block_ccw, page);
 688 }
 689
 690 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
 691                                       struct kobj_attribute *attr,
 692                                       const char *buf, size_t len)
 693 {
 694         return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
 695 }
 696
 697 static struct kobj_attribute sys_reipl_nss_vmparm_attr =
 698         __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
 699                                         reipl_nss_vmparm_store);
 700 static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
 701         __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
 702                                         reipl_ccw_vmparm_store);
 703
 704 /* FCP reipl device attributes */
 705
 706 static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
 707                                       struct bin_attribute *attr,
 708                                       char *buf, loff_t off, size_t count)
 709 {
 710         size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
 711         void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
 712
 713         return memory_read_from_buffer(buf, count, &off, scp_data, size);
 714 }
 715
 716 static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
 717                                        struct bin_attribute *attr,
 718                                        char *buf, loff_t off, size_t count)
 719 {
 720         size_t scpdata_len = count;
 721         size_t padding;
 722
 723
 724         if (off)
 725                 return -EINVAL;
 726
 727         memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf, count);
 728         if (scpdata_len % 8) {
 729                 padding = 8 - (scpdata_len % 8);
 730                 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
 731                        0, padding);
 732                 scpdata_len += padding;
 733         }
 734
 735         reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
 736         reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
 737         reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
 738
 739         return count;
 740 }
 741 static struct bin_attribute sys_reipl_fcp_scp_data_attr =
 742         __BIN_ATTR(scp_data, (S_IRUGO | S_IWUSR), reipl_fcp_scpdata_read,
 743                    reipl_fcp_scpdata_write, DIAG308_SCPDATA_SIZE);
 744
 745 static struct bin_attribute *reipl_fcp_bin_attrs[] = {
 746         &sys_reipl_fcp_scp_data_attr,
 747         NULL,
 748 };
 749
 750 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n",
 751                    reipl_block_fcp->ipl_info.fcp.wwpn);
 752 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n",
 753                    reipl_block_fcp->ipl_info.fcp.lun);
 754 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
 755                    reipl_block_fcp->ipl_info.fcp.bootprog);
 756 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
 757                    reipl_block_fcp->ipl_info.fcp.br_lba);
 758 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
 759                    reipl_block_fcp->ipl_info.fcp.devno);
 760
 761 static void reipl_get_ascii_loadparm(char *loadparm,
 762                                      struct ipl_parameter_block *ibp)
 763 {
 764         memcpy(loadparm, ibp->hdr.loadparm, LOADPARM_LEN);
 765         EBCASC(loadparm, LOADPARM_LEN);
 766         loadparm[LOADPARM_LEN] = 0;
 767         strim(loadparm);
 768 }
 769
 770 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
 771                                            char *page)
 772 {
 773         char buf[LOADPARM_LEN + 1];
 774
 775         reipl_get_ascii_loadparm(buf, ipb);
 776         return sprintf(page, "%s\n", buf);
 777 }
 778
 779 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
 780                                             const char *buf, size_t len)
 781 {
 782         int i, lp_len;
 783
 784         /* ignore trailing newline */
 785         lp_len = len;
 786         if ((len > 0) && (buf[len - 1] == '\n'))
 787                 lp_len--;
 788         /* loadparm can have max 8 characters and must not start with a blank */
 789         if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
 790                 return -EINVAL;
 791         /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
 792         for (i = 0; i < lp_len; i++) {
 793                 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
 794                     (buf[i] == '.'))
 795                         continue;
 796                 return -EINVAL;
 797         }
 798         /* initialize loadparm with blanks */
 799         memset(ipb->hdr.loadparm, ' ', LOADPARM_LEN);
 800         /* copy and convert to ebcdic */
 801         memcpy(ipb->hdr.loadparm, buf, lp_len);
 802         ASCEBC(ipb->hdr.loadparm, LOADPARM_LEN);
 803         ipb->hdr.flags |= DIAG308_FLAGS_LP_VALID;
 804         return len;
 805 }
 806
 807 /* FCP wrapper */
 808 static ssize_t reipl_fcp_loadparm_show(struct kobject *kobj,
 809                                        struct kobj_attribute *attr, char *page)
 810 {
 811         return reipl_generic_loadparm_show(reipl_block_fcp, page);
 812 }
 813
 814 static ssize_t reipl_fcp_loadparm_store(struct kobject *kobj,
 815                                         struct kobj_attribute *attr,
 816                                         const char *buf, size_t len)
 817 {
 818         return reipl_generic_loadparm_store(reipl_block_fcp, buf, len);
 819 }
 820
 821 static struct kobj_attribute sys_reipl_fcp_loadparm_attr =
 822         __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_fcp_loadparm_show,
 823                                             reipl_fcp_loadparm_store);
 824
 825 static struct attribute *reipl_fcp_attrs[] = {
 826         &sys_reipl_fcp_device_attr.attr,
 827         &sys_reipl_fcp_wwpn_attr.attr,
 828         &sys_reipl_fcp_lun_attr.attr,
 829         &sys_reipl_fcp_bootprog_attr.attr,
 830         &sys_reipl_fcp_br_lba_attr.attr,
 831         &sys_reipl_fcp_loadparm_attr.attr,
 832         NULL,
 833 };
 834
 835 static struct attribute_group reipl_fcp_attr_group = {
 836         .attrs = reipl_fcp_attrs,
 837         .bin_attrs = reipl_fcp_bin_attrs,
 838 };
 839
 840 /* CCW reipl device attributes */
 841 DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ipl_info.ccw);
 842
 843 /* NSS wrapper */
 844 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
 845                                        struct kobj_attribute *attr, char *page)
 846 {
 847         return reipl_generic_loadparm_show(reipl_block_nss, page);
 848 }
 849
 850 static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
 851                                         struct kobj_attribute *attr,
 852                                         const char *buf, size_t len)
 853 {
 854         return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
 855 }
 856
 857 /* CCW wrapper */
 858 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
 859                                        struct kobj_attribute *attr, char *page)
 860 {
 861         return reipl_generic_loadparm_show(reipl_block_ccw, page);
 862 }
 863
 864 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
 865                                         struct kobj_attribute *attr,
 866                                         const char *buf, size_t len)
 867 {
 868         return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
 869 }
 870
 871 static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
 872         __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
 873                                             reipl_ccw_loadparm_store);
 874
 875 static struct attribute *reipl_ccw_attrs_vm[] = {
 876         &sys_reipl_ccw_device_attr.attr,
 877         &sys_reipl_ccw_loadparm_attr.attr,
 878         &sys_reipl_ccw_vmparm_attr.attr,
 879         NULL,
 880 };
 881
 882 static struct attribute *reipl_ccw_attrs_lpar[] = {
 883         &sys_reipl_ccw_device_attr.attr,
 884         &sys_reipl_ccw_loadparm_attr.attr,
 885         NULL,
 886 };
 887
 888 static struct attribute_group reipl_ccw_attr_group_vm = {
 889         .name  = IPL_CCW_STR,
 890         .attrs = reipl_ccw_attrs_vm,
 891 };
 892
 893 static struct attribute_group reipl_ccw_attr_group_lpar = {
 894         .name  = IPL_CCW_STR,
 895         .attrs = reipl_ccw_attrs_lpar,
 896 };
 897
 898
 899 /* NSS reipl device attributes */
 900 static void reipl_get_ascii_nss_name(char *dst,
 901                                      struct ipl_parameter_block *ipb)
 902 {
 903         memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
 904         EBCASC(dst, NSS_NAME_SIZE);
 905         dst[NSS_NAME_SIZE] = 0;
 906 }
 907
 908 static ssize_t reipl_nss_name_show(struct kobject *kobj,
 909                                    struct kobj_attribute *attr, char *page)
 910 {
 911         char nss_name[NSS_NAME_SIZE + 1] = {};
 912
 913         reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
 914         return sprintf(page, "%s\n", nss_name);
 915 }
 916
 917 static ssize_t reipl_nss_name_store(struct kobject *kobj,
 918                                     struct kobj_attribute *attr,
 919                                     const char *buf, size_t len)
 920 {
 921         int nss_len;
 922
 923         /* ignore trailing newline */
 924         nss_len = len;
 925         if ((len > 0) && (buf[len - 1] == '\n'))
 926                 nss_len--;
 927
 928         if (nss_len > NSS_NAME_SIZE)
 929                 return -EINVAL;
 930
 931         memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
 932         if (nss_len > 0) {
 933                 reipl_block_nss->ipl_info.ccw.vm_flags |=
 934                         DIAG308_VM_FLAGS_NSS_VALID;
 935                 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
 936                 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
 937                 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
 938         } else {
 939                 reipl_block_nss->ipl_info.ccw.vm_flags &=
 940                         ~DIAG308_VM_FLAGS_NSS_VALID;
 941         }
 942
 943         return len;
 944 }
 945
 946 static struct kobj_attribute sys_reipl_nss_name_attr =
 947         __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
 948                                         reipl_nss_name_store);
 949
 950 static struct kobj_attribute sys_reipl_nss_loadparm_attr =
 951         __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
 952                                             reipl_nss_loadparm_store);
 953
 954 static struct attribute *reipl_nss_attrs[] = {
 955         &sys_reipl_nss_name_attr.attr,
 956         &sys_reipl_nss_loadparm_attr.attr,
 957         &sys_reipl_nss_vmparm_attr.attr,
 958         NULL,
 959 };
 960
 961 static struct attribute_group reipl_nss_attr_group = {
 962         .name  = IPL_NSS_STR,
 963         .attrs = reipl_nss_attrs,
 964 };
 965
 966 static void set_reipl_block_actual(struct ipl_parameter_block *reipl_block)
 967 {
 968         reipl_block_actual = reipl_block;
 969         os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual,
 970                           reipl_block->hdr.len);
 971 }
 972
 973 /* reipl type */
 974
 975 static int reipl_set_type(enum ipl_type type)
 976 {
 977         if (!(reipl_capabilities & type))
 978                 return -EINVAL;
 979
 980         switch(type) {
 981         case IPL_TYPE_CCW:
 982                 if (diag308_set_works)
 983                         reipl_method = REIPL_METHOD_CCW_DIAG;
 984                 else if (MACHINE_IS_VM)
 985                         reipl_method = REIPL_METHOD_CCW_VM;
 986                 else
 987                         reipl_method = REIPL_METHOD_CCW_CIO;
 988                 set_reipl_block_actual(reipl_block_ccw);
 989                 break;
 990         case IPL_TYPE_FCP:
 991                 if (diag308_set_works)
 992                         reipl_method = REIPL_METHOD_FCP_RW_DIAG;
 993                 else if (MACHINE_IS_VM)
 994                         reipl_method = REIPL_METHOD_FCP_RO_VM;
 995                 else
 996                         reipl_method = REIPL_METHOD_FCP_RO_DIAG;
 997                 set_reipl_block_actual(reipl_block_fcp);
 998                 break;
 999         case IPL_TYPE_FCP_DUMP:
1000                 reipl_method = REIPL_METHOD_FCP_DUMP;
1001                 break;
1002         case IPL_TYPE_NSS:
1003                 if (diag308_set_works)
1004                         reipl_method = REIPL_METHOD_NSS_DIAG;
1005                 else
1006                         reipl_method = REIPL_METHOD_NSS;
1007                 set_reipl_block_actual(reipl_block_nss);
1008                 break;
1009         case IPL_TYPE_UNKNOWN:
1010                 reipl_method = REIPL_METHOD_DEFAULT;
1011                 break;
1012         default:
1013                 BUG();
1014         }
1015         reipl_type = type;
1016         return 0;
1017 }
1018
1019 static ssize_t reipl_type_show(struct kobject *kobj,
1020                                struct kobj_attribute *attr, char *page)
1021 {
1022         return sprintf(page, "%s\n", ipl_type_str(reipl_type));
1023 }
1024
1025 static ssize_t reipl_type_store(struct kobject *kobj,
1026                                 struct kobj_attribute *attr,
1027                                 const char *buf, size_t len)
1028 {
1029         int rc = -EINVAL;
1030
1031         if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1032                 rc = reipl_set_type(IPL_TYPE_CCW);
1033         else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1034                 rc = reipl_set_type(IPL_TYPE_FCP);
1035         else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1036                 rc = reipl_set_type(IPL_TYPE_NSS);
1037         return (rc != 0) ? rc : len;
1038 }
1039
1040 static struct kobj_attribute reipl_type_attr =
1041         __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
1042
1043 static struct kset *reipl_kset;
1044 static struct kset *reipl_fcp_kset;
1045
1046 static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
1047                            const enum ipl_method m)
1048 {
1049         char loadparm[LOADPARM_LEN + 1] = {};
1050         char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
1051         char nss_name[NSS_NAME_SIZE + 1] = {};
1052         size_t pos = 0;
1053
1054         reipl_get_ascii_loadparm(loadparm, ipb);
1055         reipl_get_ascii_nss_name(nss_name, ipb);
1056         reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
1057
1058         switch (m) {
1059         case REIPL_METHOD_CCW_VM:
1060                 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
1061                 break;
1062         case REIPL_METHOD_NSS:
1063                 pos = sprintf(dst, "IPL %s", nss_name);
1064                 break;
1065         default:
1066                 break;
1067         }
1068         if (strlen(loadparm) > 0)
1069                 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
1070         if (strlen(vmparm) > 0)
1071                 sprintf(dst + pos, " PARM %s", vmparm);
1072 }
1073
1074 static void __reipl_run(void *unused)
1075 {
1076         struct ccw_dev_id devid;
1077         static char buf[128];
1078
1079         switch (reipl_method) {
1080         case REIPL_METHOD_CCW_CIO:
1081                 devid.ssid  = reipl_block_ccw->ipl_info.ccw.ssid;
1082                 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
1083                 reipl_ccw_dev(&devid);
1084                 break;
1085         case REIPL_METHOD_CCW_VM:
1086                 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
1087                 __cpcmd(buf, NULL, 0, NULL);
1088                 break;
1089         case REIPL_METHOD_CCW_DIAG:
1090                 diag308(DIAG308_SET, reipl_block_ccw);
1091                 diag308(DIAG308_LOAD_CLEAR, NULL);
1092                 break;
1093         case REIPL_METHOD_FCP_RW_DIAG:
1094                 diag308(DIAG308_SET, reipl_block_fcp);
1095                 diag308(DIAG308_LOAD_CLEAR, NULL);
1096                 break;
1097         case REIPL_METHOD_FCP_RO_DIAG:
1098                 diag308(DIAG308_LOAD_CLEAR, NULL);
1099                 break;
1100         case REIPL_METHOD_FCP_RO_VM:
1101                 __cpcmd("IPL", NULL, 0, NULL);
1102                 break;
1103         case REIPL_METHOD_NSS_DIAG:
1104                 diag308(DIAG308_SET, reipl_block_nss);
1105                 diag308(DIAG308_LOAD_CLEAR, NULL);
1106                 break;
1107         case REIPL_METHOD_NSS:
1108                 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
1109                 __cpcmd(buf, NULL, 0, NULL);
1110                 break;
1111         case REIPL_METHOD_DEFAULT:
1112                 if (MACHINE_IS_VM)
1113                         __cpcmd("IPL", NULL, 0, NULL);
1114                 diag308(DIAG308_LOAD_CLEAR, NULL);
1115                 break;
1116         case REIPL_METHOD_FCP_DUMP:
1117                 break;
1118         }
1119         disabled_wait((unsigned long) __builtin_return_address(0));
1120 }
1121
1122 static void reipl_run(struct shutdown_trigger *trigger)
1123 {
1124         smp_call_ipl_cpu(__reipl_run, NULL);
1125 }
1126
1127 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
1128 {
1129         ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
1130         ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1131         ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1132         ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1133 }
1134
1135 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1136 {
1137         /* LOADPARM */
1138         /* check if read scp info worked and set loadparm */
1139         if (sclp_ipl_info.is_valid)
1140                 memcpy(ipb->hdr.loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
1141         else
1142                 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1143                 memset(ipb->hdr.loadparm, 0x40, LOADPARM_LEN);
1144         ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
1145
1146         /* VM PARM */
1147         if (MACHINE_IS_VM && diag308_set_works &&
1148             (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1149
1150                 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1151                 ipb->ipl_info.ccw.vm_parm_len =
1152                                         ipl_block.ipl_info.ccw.vm_parm_len;
1153                 memcpy(ipb->ipl_info.ccw.vm_parm,
1154                        ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1155         }
1156 }
1157
1158 static int __init reipl_nss_init(void)
1159 {
1160         int rc;
1161
1162         if (!MACHINE_IS_VM)
1163                 return 0;
1164
1165         reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1166         if (!reipl_block_nss)
1167                 return -ENOMEM;
1168
1169         if (!diag308_set_works)
1170                 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO;
1171
1172         rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1173         if (rc)
1174                 return rc;
1175
1176         reipl_block_ccw_init(reipl_block_nss);
1177         if (ipl_info.type == IPL_TYPE_NSS) {
1178                 memset(reipl_block_nss->ipl_info.ccw.nss_name,
1179                         ' ', NSS_NAME_SIZE);
1180                 memcpy(reipl_block_nss->ipl_info.ccw.nss_name,
1181                         kernel_nss_name, strlen(kernel_nss_name));
1182                 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
1183                 reipl_block_nss->ipl_info.ccw.vm_flags |=
1184                         DIAG308_VM_FLAGS_NSS_VALID;
1185
1186                 reipl_block_ccw_fill_parms(reipl_block_nss);
1187         }
1188
1189         reipl_capabilities |= IPL_TYPE_NSS;
1190         return 0;
1191 }
1192
1193 static int __init reipl_ccw_init(void)
1194 {
1195         int rc;
1196
1197         reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1198         if (!reipl_block_ccw)
1199                 return -ENOMEM;
1200
1201         if (MACHINE_IS_VM) {
1202                 if (!diag308_set_works)
1203                         sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
1204                 rc = sysfs_create_group(&reipl_kset->kobj,
1205                                         &reipl_ccw_attr_group_vm);
1206         } else {
1207                 if(!diag308_set_works)
1208                         sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
1209                 rc = sysfs_create_group(&reipl_kset->kobj,
1210                                         &reipl_ccw_attr_group_lpar);
1211         }
1212         if (rc)
1213                 return rc;
1214
1215         reipl_block_ccw_init(reipl_block_ccw);
1216         if (ipl_info.type == IPL_TYPE_CCW) {
1217                 reipl_block_ccw->ipl_info.ccw.ssid = ipl_ssid;
1218                 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
1219                 reipl_block_ccw_fill_parms(reipl_block_ccw);
1220         }
1221
1222         reipl_capabilities |= IPL_TYPE_CCW;
1223         return 0;
1224 }
1225
1226 static int __init reipl_fcp_init(void)
1227 {
1228         int rc;
1229
1230         if (!diag308_set_works) {
1231                 if (ipl_info.type == IPL_TYPE_FCP) {
1232                         make_attrs_ro(reipl_fcp_attrs);
1233                         sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO;
1234                 } else
1235                         return 0;
1236         }
1237
1238         reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1239         if (!reipl_block_fcp)
1240                 return -ENOMEM;
1241
1242         /* sysfs: create fcp kset for mixing attr group and bin attrs */
1243         reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1244                                              &reipl_kset->kobj);
1245         if (!reipl_fcp_kset) {
1246                 free_page((unsigned long) reipl_block_fcp);
1247                 return -ENOMEM;
1248         }
1249
1250         rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1251         if (rc) {
1252                 kset_unregister(reipl_fcp_kset);
1253                 free_page((unsigned long) reipl_block_fcp);
1254                 return rc;
1255         }
1256
1257         if (ipl_info.type == IPL_TYPE_FCP) {
1258                 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
1259                 /*
1260                  * Fix loadparm: There are systems where the (SCSI) LOADPARM
1261                  * is invalid in the SCSI IPL parameter block, so take it
1262                  * always from sclp_ipl_info.
1263                  */
1264                 memcpy(reipl_block_fcp->hdr.loadparm, sclp_ipl_info.loadparm,
1265                        LOADPARM_LEN);
1266         } else {
1267                 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1268                 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1269                 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1270                 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1271                 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1272         }
1273         reipl_capabilities |= IPL_TYPE_FCP;
1274         return 0;
1275 }
1276
1277 static int __init reipl_type_init(void)
1278 {
1279         enum ipl_type reipl_type = ipl_info.type;
1280         struct ipl_parameter_block *reipl_block;
1281         unsigned long size;
1282
1283         reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size);
1284         if (!reipl_block)
1285                 goto out;
1286         /*
1287          * If we have an OS info reipl block, this will be used
1288          */
1289         if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_FCP) {
1290                 memcpy(reipl_block_fcp, reipl_block, size);
1291                 reipl_type = IPL_TYPE_FCP;
1292         } else if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_CCW) {
1293                 memcpy(reipl_block_ccw, reipl_block, size);
1294                 reipl_type = IPL_TYPE_CCW;
1295         }
1296 out:
1297         return reipl_set_type(reipl_type);
1298 }
1299
1300 static int __init reipl_init(void)
1301 {
1302         int rc;
1303
1304         reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1305         if (!reipl_kset)
1306                 return -ENOMEM;
1307         rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1308         if (rc) {
1309                 kset_unregister(reipl_kset);
1310                 return rc;
1311         }
1312         rc = reipl_ccw_init();
1313         if (rc)
1314                 return rc;
1315         rc = reipl_fcp_init();
1316         if (rc)
1317                 return rc;
1318         rc = reipl_nss_init();
1319         if (rc)
1320                 return rc;
1321         return reipl_type_init();
1322 }
1323
1324 static struct shutdown_action __refdata reipl_action = {
1325         .name   = SHUTDOWN_ACTION_REIPL_STR,
1326         .fn     = reipl_run,
1327         .init   = reipl_init,
1328 };
1329
1330 /*
1331  * dump shutdown action: Dump Linux on shutdown.
1332  */
1333
1334 /* FCP dump device attributes */
1335
1336 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n",
1337                    dump_block_fcp->ipl_info.fcp.wwpn);
1338 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n",
1339                    dump_block_fcp->ipl_info.fcp.lun);
1340 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1341                    dump_block_fcp->ipl_info.fcp.bootprog);
1342 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1343                    dump_block_fcp->ipl_info.fcp.br_lba);
1344 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1345                    dump_block_fcp->ipl_info.fcp.devno);
1346
1347 static struct attribute *dump_fcp_attrs[] = {
1348         &sys_dump_fcp_device_attr.attr,
1349         &sys_dump_fcp_wwpn_attr.attr,
1350         &sys_dump_fcp_lun_attr.attr,
1351         &sys_dump_fcp_bootprog_attr.attr,
1352         &sys_dump_fcp_br_lba_attr.attr,
1353         NULL,
1354 };
1355
1356 static struct attribute_group dump_fcp_attr_group = {
1357         .name  = IPL_FCP_STR,
1358         .attrs = dump_fcp_attrs,
1359 };
1360
1361 /* CCW dump device attributes */
1362 DEFINE_IPL_CCW_ATTR_RW(dump_ccw, device, dump_block_ccw->ipl_info.ccw);
1363
1364 static struct attribute *dump_ccw_attrs[] = {
1365         &sys_dump_ccw_device_attr.attr,
1366         NULL,
1367 };
1368
1369 static struct attribute_group dump_ccw_attr_group = {
1370         .name  = IPL_CCW_STR,
1371         .attrs = dump_ccw_attrs,
1372 };
1373
1374 /* dump type */
1375
1376 static int dump_set_type(enum dump_type type)
1377 {
1378         if (!(dump_capabilities & type))
1379                 return -EINVAL;
1380         switch (type) {
1381         case DUMP_TYPE_CCW:
1382                 if (diag308_set_works)
1383                         dump_method = DUMP_METHOD_CCW_DIAG;
1384                 else if (MACHINE_IS_VM)
1385                         dump_method = DUMP_METHOD_CCW_VM;
1386                 else
1387                         dump_method = DUMP_METHOD_CCW_CIO;
1388                 break;
1389         case DUMP_TYPE_FCP:
1390                 dump_method = DUMP_METHOD_FCP_DIAG;
1391                 break;
1392         default:
1393                 dump_method = DUMP_METHOD_NONE;
1394         }
1395         dump_type = type;
1396         return 0;
1397 }
1398
1399 static ssize_t dump_type_show(struct kobject *kobj,
1400                               struct kobj_attribute *attr, char *page)
1401 {
1402         return sprintf(page, "%s\n", dump_type_str(dump_type));
1403 }
1404
1405 static ssize_t dump_type_store(struct kobject *kobj,
1406                                struct kobj_attribute *attr,
1407                                const char *buf, size_t len)
1408 {
1409         int rc = -EINVAL;
1410
1411         if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1412                 rc = dump_set_type(DUMP_TYPE_NONE);
1413         else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1414                 rc = dump_set_type(DUMP_TYPE_CCW);
1415         else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1416                 rc = dump_set_type(DUMP_TYPE_FCP);
1417         return (rc != 0) ? rc : len;
1418 }
1419
1420 static struct kobj_attribute dump_type_attr =
1421         __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1422
1423 static struct kset *dump_kset;
1424
1425 static void diag308_dump(void *dump_block)
1426 {
1427         diag308(DIAG308_SET, dump_block);
1428         while (1) {
1429                 if (diag308(DIAG308_LOAD_NORMAL_DUMP, NULL) != 0x302)
1430                         break;
1431                 udelay_simple(USEC_PER_SEC);
1432         }
1433 }
1434
1435 static void __dump_run(void *unused)
1436 {
1437         struct ccw_dev_id devid;
1438         static char buf[100];
1439
1440         switch (dump_method) {
1441         case DUMP_METHOD_CCW_CIO:
1442                 devid.ssid  = dump_block_ccw->ipl_info.ccw.ssid;
1443                 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
1444                 reipl_ccw_dev(&devid);
1445                 break;
1446         case DUMP_METHOD_CCW_VM:
1447                 sprintf(buf, "STORE STATUS");
1448                 __cpcmd(buf, NULL, 0, NULL);
1449                 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
1450                 __cpcmd(buf, NULL, 0, NULL);
1451                 break;
1452         case DUMP_METHOD_CCW_DIAG:
1453                 diag308_dump(dump_block_ccw);
1454                 break;
1455         case DUMP_METHOD_FCP_DIAG:
1456                 diag308_dump(dump_block_fcp);
1457                 break;
1458         default:
1459                 break;
1460         }
1461 }
1462
1463 static void dump_run(struct shutdown_trigger *trigger)
1464 {
1465         if (dump_method == DUMP_METHOD_NONE)
1466                 return;
1467         smp_send_stop();
1468         smp_call_ipl_cpu(__dump_run, NULL);
1469 }
1470
1471 static int __init dump_ccw_init(void)
1472 {
1473         int rc;
1474
1475         dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1476         if (!dump_block_ccw)
1477                 return -ENOMEM;
1478         rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1479         if (rc) {
1480                 free_page((unsigned long)dump_block_ccw);
1481                 return rc;
1482         }
1483         dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1484         dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1485         dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1486         dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1487         dump_capabilities |= DUMP_TYPE_CCW;
1488         return 0;
1489 }
1490
1491 static int __init dump_fcp_init(void)
1492 {
1493         int rc;
1494
1495         if (!sclp_ipl_info.has_dump)
1496                 return 0; /* LDIPL DUMP is not installed */
1497         if (!diag308_set_works)
1498                 return 0;
1499         dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1500         if (!dump_block_fcp)
1501                 return -ENOMEM;
1502         rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1503         if (rc) {
1504                 free_page((unsigned long)dump_block_fcp);
1505                 return rc;
1506         }
1507         dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1508         dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1509         dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1510         dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1511         dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1512         dump_capabilities |= DUMP_TYPE_FCP;
1513         return 0;
1514 }
1515
1516 static int __init dump_init(void)
1517 {
1518         int rc;
1519
1520         dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1521         if (!dump_kset)
1522                 return -ENOMEM;
1523         rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1524         if (rc) {
1525                 kset_unregister(dump_kset);
1526                 return rc;
1527         }
1528         rc = dump_ccw_init();
1529         if (rc)
1530                 return rc;
1531         rc = dump_fcp_init();
1532         if (rc)
1533                 return rc;
1534         dump_set_type(DUMP_TYPE_NONE);
1535         return 0;
1536 }
1537
1538 static struct shutdown_action __refdata dump_action = {
1539         .name   = SHUTDOWN_ACTION_DUMP_STR,
1540         .fn     = dump_run,
1541         .init   = dump_init,
1542 };
1543
1544 static void dump_reipl_run(struct shutdown_trigger *trigger)
1545 {
1546         unsigned long ipib = (unsigned long) reipl_block_actual;
1547         unsigned int csum;
1548
1549         csum = (__force unsigned int)
1550                csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
1551         mem_assign_absolute(S390_lowcore.ipib, ipib);
1552         mem_assign_absolute(S390_lowcore.ipib_checksum, csum);
1553         dump_run(trigger);
1554 }
1555
1556 static int __init dump_reipl_init(void)
1557 {
1558         if (!diag308_set_works)
1559                 return -EOPNOTSUPP;
1560         else
1561                 return 0;
1562 }
1563
1564 static struct shutdown_action __refdata dump_reipl_action = {
1565         .name   = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1566         .fn     = dump_reipl_run,
1567         .init   = dump_reipl_init,
1568 };
1569
1570 /*
1571  * vmcmd shutdown action: Trigger vm command on shutdown.
1572  */
1573
1574 static char vmcmd_on_reboot[128];
1575 static char vmcmd_on_panic[128];
1576 static char vmcmd_on_halt[128];
1577 static char vmcmd_on_poff[128];
1578 static char vmcmd_on_restart[128];
1579
1580 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1581 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1582 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1583 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1584 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1585
1586 static struct attribute *vmcmd_attrs[] = {
1587         &sys_vmcmd_on_reboot_attr.attr,
1588         &sys_vmcmd_on_panic_attr.attr,
1589         &sys_vmcmd_on_halt_attr.attr,
1590         &sys_vmcmd_on_poff_attr.attr,
1591         &sys_vmcmd_on_restart_attr.attr,
1592         NULL,
1593 };
1594
1595 static struct attribute_group vmcmd_attr_group = {
1596         .attrs = vmcmd_attrs,
1597 };
1598
1599 static struct kset *vmcmd_kset;
1600
1601 static void vmcmd_run(struct shutdown_trigger *trigger)
1602 {
1603         char *cmd;
1604
1605         if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1606                 cmd = vmcmd_on_reboot;
1607         else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1608                 cmd = vmcmd_on_panic;
1609         else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1610                 cmd = vmcmd_on_halt;
1611         else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1612                 cmd = vmcmd_on_poff;
1613         else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
1614                 cmd = vmcmd_on_restart;
1615         else
1616                 return;
1617
1618         if (strlen(cmd) == 0)
1619                 return;
1620         __cpcmd(cmd, NULL, 0, NULL);
1621 }
1622
1623 static int vmcmd_init(void)
1624 {
1625         if (!MACHINE_IS_VM)
1626                 return -EOPNOTSUPP;
1627         vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1628         if (!vmcmd_kset)
1629                 return -ENOMEM;
1630         return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1631 }
1632
1633 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1634                                               vmcmd_run, vmcmd_init};
1635
1636 /*
1637  * stop shutdown action: Stop Linux on shutdown.
1638  */
1639
1640 static void stop_run(struct shutdown_trigger *trigger)
1641 {
1642         if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
1643             strcmp(trigger->name, ON_RESTART_STR) == 0)
1644                 disabled_wait((unsigned long) __builtin_return_address(0));
1645         smp_stop_cpu();
1646 }
1647
1648 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1649                                              stop_run, NULL};
1650
1651 /* action list */
1652
1653 static struct shutdown_action *shutdown_actions_list[] = {
1654         &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1655         &vmcmd_action, &stop_action};
1656 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1657
1658 /*
1659  * Trigger section
1660  */
1661
1662 static struct kset *shutdown_actions_kset;
1663
1664 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1665                        size_t len)
1666 {
1667         int i;
1668
1669         for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1670                 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1671                         if (shutdown_actions_list[i]->init_rc) {
1672                                 return shutdown_actions_list[i]->init_rc;
1673                         } else {
1674                                 trigger->action = shutdown_actions_list[i];
1675                                 return len;
1676                         }
1677                 }
1678         }
1679         return -EINVAL;
1680 }
1681
1682 /* on reipl */
1683
1684 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1685                                                     &reipl_action};
1686
1687 static ssize_t on_reboot_show(struct kobject *kobj,
1688                               struct kobj_attribute *attr, char *page)
1689 {
1690         return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1691 }
1692
1693 static ssize_t on_reboot_store(struct kobject *kobj,
1694                                struct kobj_attribute *attr,
1695                                const char *buf, size_t len)
1696 {
1697         return set_trigger(buf, &on_reboot_trigger, len);
1698 }
1699 static struct kobj_attribute on_reboot_attr = __ATTR_RW(on_reboot);
1700
1701 static void do_machine_restart(char *__unused)
1702 {
1703         smp_send_stop();
1704         on_reboot_trigger.action->fn(&on_reboot_trigger);
1705         reipl_run(NULL);
1706 }
1707 void (*_machine_restart)(char *command) = do_machine_restart;
1708
1709 /* on panic */
1710
1711 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1712
1713 static ssize_t on_panic_show(struct kobject *kobj,
1714                              struct kobj_attribute *attr, char *page)
1715 {
1716         return sprintf(page, "%s\n", on_panic_trigger.action->name);
1717 }
1718
1719 static ssize_t on_panic_store(struct kobject *kobj,
1720                               struct kobj_attribute *attr,
1721                               const char *buf, size_t len)
1722 {
1723         return set_trigger(buf, &on_panic_trigger, len);
1724 }
1725 static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic);
1726
1727 static void do_panic(void)
1728 {
1729         lgr_info_log();
1730         on_panic_trigger.action->fn(&on_panic_trigger);
1731         stop_run(&on_panic_trigger);
1732 }
1733
1734 /* on restart */
1735
1736 static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
1737         &stop_action};
1738
1739 static ssize_t on_restart_show(struct kobject *kobj,
1740                                struct kobj_attribute *attr, char *page)
1741 {
1742         return sprintf(page, "%s\n", on_restart_trigger.action->name);
1743 }
1744
1745 static ssize_t on_restart_store(struct kobject *kobj,
1746                                 struct kobj_attribute *attr,
1747                                 const char *buf, size_t len)
1748 {
1749         return set_trigger(buf, &on_restart_trigger, len);
1750 }
1751 static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart);
1752
1753 static void __do_restart(void *ignore)
1754 {
1755         __arch_local_irq_stosm(0x04); /* enable DAT */
1756         smp_send_stop();
1757 #ifdef CONFIG_CRASH_DUMP
1758         crash_kexec(NULL);
1759 #endif
1760         on_restart_trigger.action->fn(&on_restart_trigger);
1761         stop_run(&on_restart_trigger);
1762 }
1763
1764 void do_restart(void)
1765 {
1766         tracing_off();
1767         debug_locks_off();
1768         lgr_info_log();
1769         smp_call_online_cpu(__do_restart, NULL);
1770 }
1771
1772 /* on halt */
1773
1774 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1775
1776 static ssize_t on_halt_show(struct kobject *kobj,
1777                             struct kobj_attribute *attr, char *page)
1778 {
1779         return sprintf(page, "%s\n", on_halt_trigger.action->name);
1780 }
1781
1782 static ssize_t on_halt_store(struct kobject *kobj,
1783                              struct kobj_attribute *attr,
1784                              const char *buf, size_t len)
1785 {
1786         return set_trigger(buf, &on_halt_trigger, len);
1787 }
1788 static struct kobj_attribute on_halt_attr = __ATTR_RW(on_halt);
1789
1790 static void do_machine_halt(void)
1791 {
1792         smp_send_stop();
1793         on_halt_trigger.action->fn(&on_halt_trigger);
1794         stop_run(&on_halt_trigger);
1795 }
1796 void (*_machine_halt)(void) = do_machine_halt;
1797
1798 /* on power off */
1799
1800 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1801
1802 static ssize_t on_poff_show(struct kobject *kobj,
1803                             struct kobj_attribute *attr, char *page)
1804 {
1805         return sprintf(page, "%s\n", on_poff_trigger.action->name);
1806 }
1807
1808 static ssize_t on_poff_store(struct kobject *kobj,
1809                              struct kobj_attribute *attr,
1810                              const char *buf, size_t len)
1811 {
1812         return set_trigger(buf, &on_poff_trigger, len);
1813 }
1814 static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff);
1815
1816 static void do_machine_power_off(void)
1817 {
1818         smp_send_stop();
1819         on_poff_trigger.action->fn(&on_poff_trigger);
1820         stop_run(&on_poff_trigger);
1821 }
1822 void (*_machine_power_off)(void) = do_machine_power_off;
1823
1824 static struct attribute *shutdown_action_attrs[] = {
1825         &on_restart_attr.attr,
1826         &on_reboot_attr.attr,
1827         &on_panic_attr.attr,
1828         &on_halt_attr.attr,
1829         &on_poff_attr.attr,
1830         NULL,
1831 };
1832
1833 static struct attribute_group shutdown_action_attr_group = {
1834         .attrs = shutdown_action_attrs,
1835 };
1836
1837 static void __init shutdown_triggers_init(void)
1838 {
1839         shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1840                                                     firmware_kobj);
1841         if (!shutdown_actions_kset)
1842                 goto fail;
1843         if (sysfs_create_group(&shutdown_actions_kset->kobj,
1844                                &shutdown_action_attr_group))
1845                 goto fail;
1846         return;
1847 fail:
1848         panic("shutdown_triggers_init failed\n");
1849 }
1850
1851 static void __init shutdown_actions_init(void)
1852 {
1853         int i;
1854
1855         for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1856                 if (!shutdown_actions_list[i]->init)
1857                         continue;
1858                 shutdown_actions_list[i]->init_rc =
1859                         shutdown_actions_list[i]->init();
1860         }
1861 }
1862
1863 static int __init s390_ipl_init(void)
1864 {
1865         char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40};
1866
1867         sclp_early_get_ipl_info(&sclp_ipl_info);
1868         /*
1869          * Fix loadparm: There are systems where the (SCSI) LOADPARM
1870          * returned by read SCP info is invalid (contains EBCDIC blanks)
1871          * when the system has been booted via diag308. In that case we use
1872          * the value from diag308, if available.
1873          *
1874          * There are also systems where diag308 store does not work in
1875          * case the system is booted from HMC. Fortunately in this case
1876          * READ SCP info provides the correct value.
1877          */
1878         if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 &&
1879             diag308_set_works)
1880                 memcpy(sclp_ipl_info.loadparm, ipl_block.hdr.loadparm,
1881                        LOADPARM_LEN);
1882         shutdown_actions_init();
1883         shutdown_triggers_init();
1884         return 0;
1885 }
1886
1887 __initcall(s390_ipl_init);
1888
1889 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1890 {
1891         int sx, dx;
1892
1893         dx = 0;
1894         for (sx = 0; src[sx] != 0; sx++) {
1895                 if (src[sx] == '"')
1896                         continue;
1897                 dst[dx++] = src[sx];
1898                 if (dx >= n)
1899                         break;
1900         }
1901 }
1902
1903 static int __init vmcmd_on_reboot_setup(char *str)
1904 {
1905         if (!MACHINE_IS_VM)
1906                 return 1;
1907         strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1908         vmcmd_on_reboot[127] = 0;
1909         on_reboot_trigger.action = &vmcmd_action;
1910         return 1;
1911 }
1912 __setup("vmreboot=", vmcmd_on_reboot_setup);
1913
1914 static int __init vmcmd_on_panic_setup(char *str)
1915 {
1916         if (!MACHINE_IS_VM)
1917                 return 1;
1918         strncpy_skip_quote(vmcmd_on_panic, str, 127);
1919         vmcmd_on_panic[127] = 0;
1920         on_panic_trigger.action = &vmcmd_action;
1921         return 1;
1922 }
1923 __setup("vmpanic=", vmcmd_on_panic_setup);
1924
1925 static int __init vmcmd_on_halt_setup(char *str)
1926 {
1927         if (!MACHINE_IS_VM)
1928                 return 1;
1929         strncpy_skip_quote(vmcmd_on_halt, str, 127);
1930         vmcmd_on_halt[127] = 0;
1931         on_halt_trigger.action = &vmcmd_action;
1932         return 1;
1933 }
1934 __setup("vmhalt=", vmcmd_on_halt_setup);
1935
1936 static int __init vmcmd_on_poff_setup(char *str)
1937 {
1938         if (!MACHINE_IS_VM)
1939                 return 1;
1940         strncpy_skip_quote(vmcmd_on_poff, str, 127);
1941         vmcmd_on_poff[127] = 0;
1942         on_poff_trigger.action = &vmcmd_action;
1943         return 1;
1944 }
1945 __setup("vmpoff=", vmcmd_on_poff_setup);
1946
1947 static int on_panic_notify(struct notifier_block *self,
1948                            unsigned long event, void *data)
1949 {
1950         do_panic();
1951         return NOTIFY_OK;
1952 }
1953
1954 static struct notifier_block on_panic_nb = {
1955         .notifier_call = on_panic_notify,
1956         .priority = INT_MIN,
1957 };
1958
1959 void __init setup_ipl(void)
1960 {
1961         ipl_info.type = get_ipl_type();
1962         switch (ipl_info.type) {
1963         case IPL_TYPE_CCW:
1964                 ipl_info.data.ccw.dev_id.ssid = ipl_ssid;
1965                 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1966                 break;
1967         case IPL_TYPE_FCP:
1968         case IPL_TYPE_FCP_DUMP:
1969                 ipl_info.data.fcp.dev_id.ssid = 0;
1970                 ipl_info.data.fcp.dev_id.devno =
1971                         IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1972                 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1973                 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1974                 break;
1975         case IPL_TYPE_NSS:
1976                 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1977                         sizeof(ipl_info.data.nss.name));
1978                 break;
1979         case IPL_TYPE_UNKNOWN:
1980                 /* We have no info to copy */
1981                 break;
1982         }
1983         atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1984 }
1985
1986 void __init ipl_update_parameters(void)
1987 {
1988         int rc;
1989
1990         rc = diag308(DIAG308_STORE, &ipl_block);
1991         if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
1992                 diag308_set_works = 1;
1993 }
1994
1995 void __init ipl_verify_parameters(void)
1996 {
1997         struct cio_iplinfo iplinfo;
1998
1999         if (cio_get_iplinfo(&iplinfo))
2000                 return;
2001
2002         ipl_ssid = iplinfo.ssid;
2003         ipl_devno = iplinfo.devno;
2004         ipl_flags |= IPL_DEVNO_VALID;
2005         if (!iplinfo.is_qdio)
2006                 return;
2007         ipl_flags |= IPL_PARMBLOCK_VALID;
2008 }
2009
2010 static LIST_HEAD(rcall);
2011 static DEFINE_MUTEX(rcall_mutex);
2012
2013 void register_reset_call(struct reset_call *reset)
2014 {
2015         mutex_lock(&rcall_mutex);
2016         list_add(&reset->list, &rcall);
2017         mutex_unlock(&rcall_mutex);
2018 }
2019 EXPORT_SYMBOL_GPL(register_reset_call);
2020
2021 void unregister_reset_call(struct reset_call *reset)
2022 {
2023         mutex_lock(&rcall_mutex);
2024         list_del(&reset->list);
2025         mutex_unlock(&rcall_mutex);
2026 }
2027 EXPORT_SYMBOL_GPL(unregister_reset_call);
2028
2029 static void do_reset_calls(void)
2030 {
2031         struct reset_call *reset;
2032
2033         if (diag308_set_works) {
2034                 diag308_reset();
2035                 return;
2036         }
2037         list_for_each_entry(reset, &rcall, list)
2038                 reset->fn();
2039 }
2040
2041 void s390_reset_system(void)
2042 {
2043         struct lowcore *lc;
2044
2045         lc = (struct lowcore *)(unsigned long) store_prefix();
2046
2047         /* Stack for interrupt/machine check handler */
2048         lc->panic_stack = S390_lowcore.panic_stack;
2049
2050         /* Disable prefixing */
2051         set_prefix(0);
2052
2053         /* Disable lowcore protection */
2054         __ctl_clear_bit(0,28);
2055
2056         /* Set new machine check handler */
2057         S390_lowcore.mcck_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
2058         S390_lowcore.mcck_new_psw.addr =
2059                 (unsigned long) s390_base_mcck_handler;
2060
2061         /* Set new program check handler */
2062         S390_lowcore.program_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
2063         S390_lowcore.program_new_psw.addr =
2064                 (unsigned long) s390_base_pgm_handler;
2065
2066         do_reset_calls();
2067 }