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