Pileus Git - ~andy/linux/blob - arch/s390/kernel/ipl.c

   1 /*
   2  *  arch/s390/kernel/ipl.c
   3  *    ipl/reipl/dump support for Linux on s390.
   4  *
   5  *    Copyright IBM Corp. 2005,2007
   6  *    Author(s): Michael Holzheu <holzheu@de.ibm.com>
   7  *               Heiko Carstens <heiko.carstens@de.ibm.com>
   8  *               Volker Sameske <sameske@de.ibm.com>
   9  */
  10
  11 #include <linux/types.h>
  12 #include <linux/module.h>
  13 #include <linux/device.h>
  14 #include <linux/delay.h>
  15 #include <linux/reboot.h>
  16 #include <linux/ctype.h>
  17 #include <linux/fs.h>
  18 #include <linux/gfp.h>
  19 #include <linux/crash_dump.h>
  20 #include <asm/ipl.h>
  21 #include <asm/smp.h>
  22 #include <asm/setup.h>
  23 #include <asm/cpcmd.h>
  24 #include <asm/cio.h>
  25 #include <asm/ebcdic.h>
  26 #include <asm/reset.h>
  27 #include <asm/sclp.h>
  28 #include <asm/sigp.h>
  29 #include <asm/checksum.h>
  30
  31 #define IPL_PARM_BLOCK_VERSION 0
  32
  33 #define IPL_UNKNOWN_STR         "unknown"
  34 #define IPL_CCW_STR             "ccw"
  35 #define IPL_FCP_STR             "fcp"
  36 #define IPL_FCP_DUMP_STR        "fcp_dump"
  37 #define IPL_NSS_STR             "nss"
  38
  39 #define DUMP_CCW_STR            "ccw"
  40 #define DUMP_FCP_STR            "fcp"
  41 #define DUMP_NONE_STR           "none"
  42
  43 /*
  44  * Four shutdown trigger types are supported:
  45  * - panic
  46  * - halt
  47  * - power off
  48  * - reipl
  49  * - restart
  50  */
  51 #define ON_PANIC_STR            "on_panic"
  52 #define ON_HALT_STR             "on_halt"
  53 #define ON_POFF_STR             "on_poff"
  54 #define ON_REIPL_STR            "on_reboot"
  55 #define ON_RESTART_STR          "on_restart"
  56
  57 struct shutdown_action;
  58 struct shutdown_trigger {
  59         char *name;
  60         struct shutdown_action *action;
  61 };
  62
  63 /*
  64  * The following shutdown action types are supported:
  65  */
  66 #define SHUTDOWN_ACTION_IPL_STR         "ipl"
  67 #define SHUTDOWN_ACTION_REIPL_STR       "reipl"
  68 #define SHUTDOWN_ACTION_DUMP_STR        "dump"
  69 #define SHUTDOWN_ACTION_VMCMD_STR       "vmcmd"
  70 #define SHUTDOWN_ACTION_STOP_STR        "stop"
  71 #define SHUTDOWN_ACTION_DUMP_REIPL_STR  "dump_reipl"
  72
  73 struct shutdown_action {
  74         char *name;
  75         void (*fn) (struct shutdown_trigger *trigger);
  76         int (*init) (void);
  77         int init_rc;
  78 };
  79
  80 static char *ipl_type_str(enum ipl_type type)
  81 {
  82         switch (type) {
  83         case IPL_TYPE_CCW:
  84                 return IPL_CCW_STR;
  85         case IPL_TYPE_FCP:
  86                 return IPL_FCP_STR;
  87         case IPL_TYPE_FCP_DUMP:
  88                 return IPL_FCP_DUMP_STR;
  89         case IPL_TYPE_NSS:
  90                 return IPL_NSS_STR;
  91         case IPL_TYPE_UNKNOWN:
  92         default:
  93                 return IPL_UNKNOWN_STR;
  94         }
  95 }
  96
  97 enum dump_type {
  98         DUMP_TYPE_NONE  = 1,
  99         DUMP_TYPE_CCW   = 2,
 100         DUMP_TYPE_FCP   = 4,
 101 };
 102
 103 static char *dump_type_str(enum dump_type type)
 104 {
 105         switch (type) {
 106         case DUMP_TYPE_NONE:
 107                 return DUMP_NONE_STR;
 108         case DUMP_TYPE_CCW:
 109                 return DUMP_CCW_STR;
 110         case DUMP_TYPE_FCP:
 111                 return DUMP_FCP_STR;
 112         default:
 113                 return NULL;
 114         }
 115 }
 116
 117 /*
 118  * Must be in data section since the bss section
 119  * is not cleared when these are accessed.
 120  */
 121 static u16 ipl_devno __attribute__((__section__(".data"))) = 0;
 122 u32 ipl_flags __attribute__((__section__(".data"))) = 0;
 123
 124 enum ipl_method {
 125         REIPL_METHOD_CCW_CIO,
 126         REIPL_METHOD_CCW_DIAG,
 127         REIPL_METHOD_CCW_VM,
 128         REIPL_METHOD_FCP_RO_DIAG,
 129         REIPL_METHOD_FCP_RW_DIAG,
 130         REIPL_METHOD_FCP_RO_VM,
 131         REIPL_METHOD_FCP_DUMP,
 132         REIPL_METHOD_NSS,
 133         REIPL_METHOD_NSS_DIAG,
 134         REIPL_METHOD_DEFAULT,
 135 };
 136
 137 enum dump_method {
 138         DUMP_METHOD_NONE,
 139         DUMP_METHOD_CCW_CIO,
 140         DUMP_METHOD_CCW_DIAG,
 141         DUMP_METHOD_CCW_VM,
 142         DUMP_METHOD_FCP_DIAG,
 143 };
 144
 145 static int diag308_set_works = 0;
 146
 147 static struct ipl_parameter_block ipl_block;
 148
 149 static int reipl_capabilities = IPL_TYPE_UNKNOWN;
 150
 151 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
 152 static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
 153 static struct ipl_parameter_block *reipl_block_fcp;
 154 static struct ipl_parameter_block *reipl_block_ccw;
 155 static struct ipl_parameter_block *reipl_block_nss;
 156 static struct ipl_parameter_block *reipl_block_actual;
 157
 158 static int dump_capabilities = DUMP_TYPE_NONE;
 159 static enum dump_type dump_type = DUMP_TYPE_NONE;
 160 static enum dump_method dump_method = DUMP_METHOD_NONE;
 161 static struct ipl_parameter_block *dump_block_fcp;
 162 static struct ipl_parameter_block *dump_block_ccw;
 163
 164 static struct sclp_ipl_info sclp_ipl_info;
 165
 166 int diag308(unsigned long subcode, void *addr)
 167 {
 168         register unsigned long _addr asm("0") = (unsigned long) addr;
 169         register unsigned long _rc asm("1") = 0;
 170
 171         asm volatile(
 172                 "       diag    %0,%2,0x308\n"
 173                 "0:\n"
 174                 EX_TABLE(0b,0b)
 175                 : "+d" (_addr), "+d" (_rc)
 176                 : "d" (subcode) : "cc", "memory");
 177         return _rc;
 178 }
 179 EXPORT_SYMBOL_GPL(diag308);
 180
 181 /* SYSFS */
 182
 183 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value)             \
 184 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,     \
 185                 struct kobj_attribute *attr,                            \
 186                 char *page)                                             \
 187 {                                                                       \
 188         return sprintf(page, _format, _value);                          \
 189 }                                                                       \
 190 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 191         __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL);
 192
 193 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)   \
 194 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,     \
 195                 struct kobj_attribute *attr,                            \
 196                 char *page)                                             \
 197 {                                                                       \
 198         return sprintf(page, _fmt_out,                                  \
 199                         (unsigned long long) _value);                   \
 200 }                                                                       \
 201 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,    \
 202                 struct kobj_attribute *attr,                            \
 203                 const char *buf, size_t len)                            \
 204 {                                                                       \
 205         unsigned long long value;                                       \
 206         if (sscanf(buf, _fmt_in, &value) != 1)                          \
 207                 return -EINVAL;                                         \
 208         _value = value;                                                 \
 209         return len;                                                     \
 210 }                                                                       \
 211 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 212         __ATTR(_name,(S_IRUGO | S_IWUSR),                               \
 213                         sys_##_prefix##_##_name##_show,                 \
 214                         sys_##_prefix##_##_name##_store);
 215
 216 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
 217 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,     \
 218                 struct kobj_attribute *attr,                            \
 219                 char *page)                                             \
 220 {                                                                       \
 221         return sprintf(page, _fmt_out, _value);                         \
 222 }                                                                       \
 223 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,    \
 224                 struct kobj_attribute *attr,                            \
 225                 const char *buf, size_t len)                            \
 226 {                                                                       \
 227         strncpy(_value, buf, sizeof(_value) - 1);                       \
 228         strim(_value);                                                  \
 229         return len;                                                     \
 230 }                                                                       \
 231 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 232         __ATTR(_name,(S_IRUGO | S_IWUSR),                               \
 233                         sys_##_prefix##_##_name##_show,                 \
 234                         sys_##_prefix##_##_name##_store);
 235
 236 static void make_attrs_ro(struct attribute **attrs)
 237 {
 238         while (*attrs) {
 239                 (*attrs)->mode = S_IRUGO;
 240                 attrs++;
 241         }
 242 }
 243
 244 /*
 245  * ipl section
 246  */
 247
 248 static __init enum ipl_type get_ipl_type(void)
 249 {
 250         struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
 251
 252         if (ipl_flags & IPL_NSS_VALID)
 253                 return IPL_TYPE_NSS;
 254         if (!(ipl_flags & IPL_DEVNO_VALID))
 255                 return IPL_TYPE_UNKNOWN;
 256         if (!(ipl_flags & IPL_PARMBLOCK_VALID))
 257                 return IPL_TYPE_CCW;
 258         if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
 259                 return IPL_TYPE_UNKNOWN;
 260         if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
 261                 return IPL_TYPE_UNKNOWN;
 262         if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
 263                 return IPL_TYPE_FCP_DUMP;
 264         return IPL_TYPE_FCP;
 265 }
 266
 267 struct ipl_info ipl_info;
 268 EXPORT_SYMBOL_GPL(ipl_info);
 269
 270 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
 271                              char *page)
 272 {
 273         return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
 274 }
 275
 276 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
 277
 278 /* VM IPL PARM routines */
 279 static size_t reipl_get_ascii_vmparm(char *dest, size_t size,
 280                                      const struct ipl_parameter_block *ipb)
 281 {
 282         int i;
 283         size_t len;
 284         char has_lowercase = 0;
 285
 286         len = 0;
 287         if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
 288             (ipb->ipl_info.ccw.vm_parm_len > 0)) {
 289
 290                 len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
 291                 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
 292                 /* If at least one character is lowercase, we assume mixed
 293                  * case; otherwise we convert everything to lowercase.
 294                  */
 295                 for (i = 0; i < len; i++)
 296                         if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
 297                             (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
 298                             (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
 299                                 has_lowercase = 1;
 300                                 break;
 301                         }
 302                 if (!has_lowercase)
 303                         EBC_TOLOWER(dest, len);
 304                 EBCASC(dest, len);
 305         }
 306         dest[len] = 0;
 307
 308         return len;
 309 }
 310
 311 size_t append_ipl_vmparm(char *dest, size_t size)
 312 {
 313         size_t rc;
 314
 315         rc = 0;
 316         if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
 317                 rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
 318         else
 319                 dest[0] = 0;
 320         return rc;
 321 }
 322
 323 static ssize_t ipl_vm_parm_show(struct kobject *kobj,
 324                                 struct kobj_attribute *attr, char *page)
 325 {
 326         char parm[DIAG308_VMPARM_SIZE + 1] = {};
 327
 328         append_ipl_vmparm(parm, sizeof(parm));
 329         return sprintf(page, "%s\n", parm);
 330 }
 331
 332 static size_t scpdata_length(const char* buf, size_t count)
 333 {
 334         while (count) {
 335                 if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
 336                         break;
 337                 count--;
 338         }
 339         return count;
 340 }
 341
 342 static size_t reipl_append_ascii_scpdata(char *dest, size_t size,
 343                                          const struct ipl_parameter_block *ipb)
 344 {
 345         size_t count;
 346         size_t i;
 347         int has_lowercase;
 348
 349         count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data,
 350                                              ipb->ipl_info.fcp.scp_data_len));
 351         if (!count)
 352                 goto out;
 353
 354         has_lowercase = 0;
 355         for (i = 0; i < count; i++) {
 356                 if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
 357                         count = 0;
 358                         goto out;
 359                 }
 360                 if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
 361                         has_lowercase = 1;
 362         }
 363
 364         if (has_lowercase)
 365                 memcpy(dest, ipb->ipl_info.fcp.scp_data, count);
 366         else
 367                 for (i = 0; i < count; i++)
 368                         dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]);
 369 out:
 370         dest[count] = '\0';
 371         return count;
 372 }
 373
 374 size_t append_ipl_scpdata(char *dest, size_t len)
 375 {
 376         size_t rc;
 377
 378         rc = 0;
 379         if (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP)
 380                 rc = reipl_append_ascii_scpdata(dest, len, &ipl_block);
 381         else
 382                 dest[0] = 0;
 383         return rc;
 384 }
 385
 386
 387 static struct kobj_attribute sys_ipl_vm_parm_attr =
 388         __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
 389
 390 static ssize_t sys_ipl_device_show(struct kobject *kobj,
 391                                    struct kobj_attribute *attr, char *page)
 392 {
 393         struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
 394
 395         switch (ipl_info.type) {
 396         case IPL_TYPE_CCW:
 397                 return sprintf(page, "0.0.%04x\n", ipl_devno);
 398         case IPL_TYPE_FCP:
 399         case IPL_TYPE_FCP_DUMP:
 400                 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
 401         default:
 402                 return 0;
 403         }
 404 }
 405
 406 static struct kobj_attribute sys_ipl_device_attr =
 407         __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
 408
 409 static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
 410                                   struct bin_attribute *attr, char *buf,
 411                                   loff_t off, size_t count)
 412 {
 413         return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START,
 414                                         IPL_PARMBLOCK_SIZE);
 415 }
 416
 417 static struct bin_attribute ipl_parameter_attr = {
 418         .attr = {
 419                 .name = "binary_parameter",
 420                 .mode = S_IRUGO,
 421         },
 422         .size = PAGE_SIZE,
 423         .read = &ipl_parameter_read,
 424 };
 425
 426 static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
 427                                  struct bin_attribute *attr, char *buf,
 428                                  loff_t off, size_t count)
 429 {
 430         unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
 431         void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
 432
 433         return memory_read_from_buffer(buf, count, &off, scp_data, size);
 434 }
 435
 436 static struct bin_attribute ipl_scp_data_attr = {
 437         .attr = {
 438                 .name = "scp_data",
 439                 .mode = S_IRUGO,
 440         },
 441         .size = PAGE_SIZE,
 442         .read = ipl_scp_data_read,
 443 };
 444
 445 /* FCP ipl device attributes */
 446
 447 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
 448                    IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
 449 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
 450                    IPL_PARMBLOCK_START->ipl_info.fcp.lun);
 451 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
 452                    IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
 453 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
 454                    IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
 455
 456 static struct attribute *ipl_fcp_attrs[] = {
 457         &sys_ipl_type_attr.attr,
 458         &sys_ipl_device_attr.attr,
 459         &sys_ipl_fcp_wwpn_attr.attr,
 460         &sys_ipl_fcp_lun_attr.attr,
 461         &sys_ipl_fcp_bootprog_attr.attr,
 462         &sys_ipl_fcp_br_lba_attr.attr,
 463         NULL,
 464 };
 465
 466 static struct attribute_group ipl_fcp_attr_group = {
 467         .attrs = ipl_fcp_attrs,
 468 };
 469
 470 /* CCW ipl device attributes */
 471
 472 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
 473                                      struct kobj_attribute *attr, char *page)
 474 {
 475         char loadparm[LOADPARM_LEN + 1] = {};
 476
 477         if (!sclp_ipl_info.is_valid)
 478                 return sprintf(page, "#unknown#\n");
 479         memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
 480         EBCASC(loadparm, LOADPARM_LEN);
 481         strim(loadparm);
 482         return sprintf(page, "%s\n", loadparm);
 483 }
 484
 485 static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
 486         __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
 487
 488 static struct attribute *ipl_ccw_attrs_vm[] = {
 489         &sys_ipl_type_attr.attr,
 490         &sys_ipl_device_attr.attr,
 491         &sys_ipl_ccw_loadparm_attr.attr,
 492         &sys_ipl_vm_parm_attr.attr,
 493         NULL,
 494 };
 495
 496 static struct attribute *ipl_ccw_attrs_lpar[] = {
 497         &sys_ipl_type_attr.attr,
 498         &sys_ipl_device_attr.attr,
 499         &sys_ipl_ccw_loadparm_attr.attr,
 500         NULL,
 501 };
 502
 503 static struct attribute_group ipl_ccw_attr_group_vm = {
 504         .attrs = ipl_ccw_attrs_vm,
 505 };
 506
 507 static struct attribute_group ipl_ccw_attr_group_lpar = {
 508         .attrs = ipl_ccw_attrs_lpar
 509 };
 510
 511 /* NSS ipl device attributes */
 512
 513 DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
 514
 515 static struct attribute *ipl_nss_attrs[] = {
 516         &sys_ipl_type_attr.attr,
 517         &sys_ipl_nss_name_attr.attr,
 518         &sys_ipl_ccw_loadparm_attr.attr,
 519         &sys_ipl_vm_parm_attr.attr,
 520         NULL,
 521 };
 522
 523 static struct attribute_group ipl_nss_attr_group = {
 524         .attrs = ipl_nss_attrs,
 525 };
 526
 527 /* UNKNOWN ipl device attributes */
 528
 529 static struct attribute *ipl_unknown_attrs[] = {
 530         &sys_ipl_type_attr.attr,
 531         NULL,
 532 };
 533
 534 static struct attribute_group ipl_unknown_attr_group = {
 535         .attrs = ipl_unknown_attrs,
 536 };
 537
 538 static struct kset *ipl_kset;
 539
 540 static int __init ipl_register_fcp_files(void)
 541 {
 542         int rc;
 543
 544         rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
 545         if (rc)
 546                 goto out;
 547         rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
 548         if (rc)
 549                 goto out_ipl_parm;
 550         rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_scp_data_attr);
 551         if (!rc)
 552                 goto out;
 553
 554         sysfs_remove_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
 555
 556 out_ipl_parm:
 557         sysfs_remove_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
 558 out:
 559         return rc;
 560 }
 561
 562 static void __ipl_run(void *unused)
 563 {
 564         diag308(DIAG308_IPL, NULL);
 565         if (MACHINE_IS_VM)
 566                 __cpcmd("IPL", NULL, 0, NULL);
 567         else if (ipl_info.type == IPL_TYPE_CCW)
 568                 reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
 569 }
 570
 571 static void ipl_run(struct shutdown_trigger *trigger)
 572 {
 573         smp_switch_to_ipl_cpu(__ipl_run, NULL);
 574 }
 575
 576 static int __init ipl_init(void)
 577 {
 578         int rc;
 579
 580         ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
 581         if (!ipl_kset) {
 582                 rc = -ENOMEM;
 583                 goto out;
 584         }
 585         switch (ipl_info.type) {
 586         case IPL_TYPE_CCW:
 587                 if (MACHINE_IS_VM)
 588                         rc = sysfs_create_group(&ipl_kset->kobj,
 589                                                 &ipl_ccw_attr_group_vm);
 590                 else
 591                         rc = sysfs_create_group(&ipl_kset->kobj,
 592                                                 &ipl_ccw_attr_group_lpar);
 593                 break;
 594         case IPL_TYPE_FCP:
 595         case IPL_TYPE_FCP_DUMP:
 596                 rc = ipl_register_fcp_files();
 597                 break;
 598         case IPL_TYPE_NSS:
 599                 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group);
 600                 break;
 601         default:
 602                 rc = sysfs_create_group(&ipl_kset->kobj,
 603                                         &ipl_unknown_attr_group);
 604                 break;
 605         }
 606 out:
 607         if (rc)
 608                 panic("ipl_init failed: rc = %i\n", rc);
 609
 610         return 0;
 611 }
 612
 613 static struct shutdown_action __refdata ipl_action = {
 614         .name   = SHUTDOWN_ACTION_IPL_STR,
 615         .fn     = ipl_run,
 616         .init   = ipl_init,
 617 };
 618
 619 /*
 620  * reipl shutdown action: Reboot Linux on shutdown.
 621  */
 622
 623 /* VM IPL PARM attributes */
 624 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
 625                                           char *page)
 626 {
 627         char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
 628
 629         reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
 630         return sprintf(page, "%s\n", vmparm);
 631 }
 632
 633 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
 634                                           size_t vmparm_max,
 635                                           const char *buf, size_t len)
 636 {
 637         int i, ip_len;
 638
 639         /* ignore trailing newline */
 640         ip_len = len;
 641         if ((len > 0) && (buf[len - 1] == '\n'))
 642                 ip_len--;
 643
 644         if (ip_len > vmparm_max)
 645                 return -EINVAL;
 646
 647         /* parm is used to store kernel options, check for common chars */
 648         for (i = 0; i < ip_len; i++)
 649                 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
 650                         return -EINVAL;
 651
 652         memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
 653         ipb->ipl_info.ccw.vm_parm_len = ip_len;
 654         if (ip_len > 0) {
 655                 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
 656                 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
 657                 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
 658         } else {
 659                 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
 660         }
 661
 662         return len;
 663 }
 664
 665 /* NSS wrapper */
 666 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
 667                                      struct kobj_attribute *attr, char *page)
 668 {
 669         return reipl_generic_vmparm_show(reipl_block_nss, page);
 670 }
 671
 672 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
 673                                       struct kobj_attribute *attr,
 674                                       const char *buf, size_t len)
 675 {
 676         return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
 677 }
 678
 679 /* CCW wrapper */
 680 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
 681                                      struct kobj_attribute *attr, char *page)
 682 {
 683         return reipl_generic_vmparm_show(reipl_block_ccw, page);
 684 }
 685
 686 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
 687                                       struct kobj_attribute *attr,
 688                                       const char *buf, size_t len)
 689 {
 690         return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
 691 }
 692
 693 static struct kobj_attribute sys_reipl_nss_vmparm_attr =
 694         __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
 695                                         reipl_nss_vmparm_store);
 696 static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
 697         __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
 698                                         reipl_ccw_vmparm_store);
 699
 700 /* FCP reipl device attributes */
 701
 702 static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
 703                                       struct bin_attribute *attr,
 704                                       char *buf, loff_t off, size_t count)
 705 {
 706         size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
 707         void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
 708
 709         return memory_read_from_buffer(buf, count, &off, scp_data, size);
 710 }
 711
 712 static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
 713                                        struct bin_attribute *attr,
 714                                        char *buf, loff_t off, size_t count)
 715 {
 716         size_t padding;
 717         size_t scpdata_len;
 718
 719         if (off < 0)
 720                 return -EINVAL;
 721
 722         if (off >= DIAG308_SCPDATA_SIZE)
 723                 return -ENOSPC;
 724
 725         if (count > DIAG308_SCPDATA_SIZE - off)
 726                 count = DIAG308_SCPDATA_SIZE - off;
 727
 728         memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf + off, count);
 729         scpdata_len = off + count;
 730
 731         if (scpdata_len % 8) {
 732                 padding = 8 - (scpdata_len % 8);
 733                 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
 734                        0, padding);
 735                 scpdata_len += padding;
 736         }
 737
 738         reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
 739         reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
 740         reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
 741
 742         return count;
 743 }
 744
 745 static struct bin_attribute sys_reipl_fcp_scp_data_attr = {
 746         .attr = {
 747                 .name = "scp_data",
 748                 .mode = S_IRUGO | S_IWUSR,
 749         },
 750         .size = PAGE_SIZE,
 751         .read = reipl_fcp_scpdata_read,
 752         .write = reipl_fcp_scpdata_write,
 753 };
 754
 755 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n",
 756                    reipl_block_fcp->ipl_info.fcp.wwpn);
 757 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n",
 758                    reipl_block_fcp->ipl_info.fcp.lun);
 759 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
 760                    reipl_block_fcp->ipl_info.fcp.bootprog);
 761 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
 762                    reipl_block_fcp->ipl_info.fcp.br_lba);
 763 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
 764                    reipl_block_fcp->ipl_info.fcp.devno);
 765
 766 static struct attribute *reipl_fcp_attrs[] = {
 767         &sys_reipl_fcp_device_attr.attr,
 768         &sys_reipl_fcp_wwpn_attr.attr,
 769         &sys_reipl_fcp_lun_attr.attr,
 770         &sys_reipl_fcp_bootprog_attr.attr,
 771         &sys_reipl_fcp_br_lba_attr.attr,
 772         NULL,
 773 };
 774
 775 static struct attribute_group reipl_fcp_attr_group = {
 776         .attrs = reipl_fcp_attrs,
 777 };
 778
 779 /* CCW reipl device attributes */
 780
 781 DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
 782         reipl_block_ccw->ipl_info.ccw.devno);
 783
 784 static void reipl_get_ascii_loadparm(char *loadparm,
 785                                      struct ipl_parameter_block *ibp)
 786 {
 787         memcpy(loadparm, ibp->ipl_info.ccw.load_parm, LOADPARM_LEN);
 788         EBCASC(loadparm, LOADPARM_LEN);
 789         loadparm[LOADPARM_LEN] = 0;
 790         strim(loadparm);
 791 }
 792
 793 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
 794                                            char *page)
 795 {
 796         char buf[LOADPARM_LEN + 1];
 797
 798         reipl_get_ascii_loadparm(buf, ipb);
 799         return sprintf(page, "%s\n", buf);
 800 }
 801
 802 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
 803                                             const char *buf, size_t len)
 804 {
 805         int i, lp_len;
 806
 807         /* ignore trailing newline */
 808         lp_len = len;
 809         if ((len > 0) && (buf[len - 1] == '\n'))
 810                 lp_len--;
 811         /* loadparm can have max 8 characters and must not start with a blank */
 812         if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
 813                 return -EINVAL;
 814         /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
 815         for (i = 0; i < lp_len; i++) {
 816                 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
 817                     (buf[i] == '.'))
 818                         continue;
 819                 return -EINVAL;
 820         }
 821         /* initialize loadparm with blanks */
 822         memset(ipb->ipl_info.ccw.load_parm, ' ', LOADPARM_LEN);
 823         /* copy and convert to ebcdic */
 824         memcpy(ipb->ipl_info.ccw.load_parm, buf, lp_len);
 825         ASCEBC(ipb->ipl_info.ccw.load_parm, LOADPARM_LEN);
 826         return len;
 827 }
 828
 829 /* NSS wrapper */
 830 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
 831                                        struct kobj_attribute *attr, char *page)
 832 {
 833         return reipl_generic_loadparm_show(reipl_block_nss, page);
 834 }
 835
 836 static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
 837                                         struct kobj_attribute *attr,
 838                                         const char *buf, size_t len)
 839 {
 840         return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
 841 }
 842
 843 /* CCW wrapper */
 844 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
 845                                        struct kobj_attribute *attr, char *page)
 846 {
 847         return reipl_generic_loadparm_show(reipl_block_ccw, page);
 848 }
 849
 850 static ssize_t reipl_ccw_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_ccw, buf, len);
 855 }
 856
 857 static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
 858         __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
 859                                             reipl_ccw_loadparm_store);
 860
 861 static struct attribute *reipl_ccw_attrs_vm[] = {
 862         &sys_reipl_ccw_device_attr.attr,
 863         &sys_reipl_ccw_loadparm_attr.attr,
 864         &sys_reipl_ccw_vmparm_attr.attr,
 865         NULL,
 866 };
 867
 868 static struct attribute *reipl_ccw_attrs_lpar[] = {
 869         &sys_reipl_ccw_device_attr.attr,
 870         &sys_reipl_ccw_loadparm_attr.attr,
 871         NULL,
 872 };
 873
 874 static struct attribute_group reipl_ccw_attr_group_vm = {
 875         .name  = IPL_CCW_STR,
 876         .attrs = reipl_ccw_attrs_vm,
 877 };
 878
 879 static struct attribute_group reipl_ccw_attr_group_lpar = {
 880         .name  = IPL_CCW_STR,
 881         .attrs = reipl_ccw_attrs_lpar,
 882 };
 883
 884
 885 /* NSS reipl device attributes */
 886 static void reipl_get_ascii_nss_name(char *dst,
 887                                      struct ipl_parameter_block *ipb)
 888 {
 889         memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
 890         EBCASC(dst, NSS_NAME_SIZE);
 891         dst[NSS_NAME_SIZE] = 0;
 892 }
 893
 894 static ssize_t reipl_nss_name_show(struct kobject *kobj,
 895                                    struct kobj_attribute *attr, char *page)
 896 {
 897         char nss_name[NSS_NAME_SIZE + 1] = {};
 898
 899         reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
 900         return sprintf(page, "%s\n", nss_name);
 901 }
 902
 903 static ssize_t reipl_nss_name_store(struct kobject *kobj,
 904                                     struct kobj_attribute *attr,
 905                                     const char *buf, size_t len)
 906 {
 907         int nss_len;
 908
 909         /* ignore trailing newline */
 910         nss_len = len;
 911         if ((len > 0) && (buf[len - 1] == '\n'))
 912                 nss_len--;
 913
 914         if (nss_len > NSS_NAME_SIZE)
 915                 return -EINVAL;
 916
 917         memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
 918         if (nss_len > 0) {
 919                 reipl_block_nss->ipl_info.ccw.vm_flags |=
 920                         DIAG308_VM_FLAGS_NSS_VALID;
 921                 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
 922                 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
 923                 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
 924         } else {
 925                 reipl_block_nss->ipl_info.ccw.vm_flags &=
 926                         ~DIAG308_VM_FLAGS_NSS_VALID;
 927         }
 928
 929         return len;
 930 }
 931
 932 static struct kobj_attribute sys_reipl_nss_name_attr =
 933         __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
 934                                         reipl_nss_name_store);
 935
 936 static struct kobj_attribute sys_reipl_nss_loadparm_attr =
 937         __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
 938                                             reipl_nss_loadparm_store);
 939
 940 static struct attribute *reipl_nss_attrs[] = {
 941         &sys_reipl_nss_name_attr.attr,
 942         &sys_reipl_nss_loadparm_attr.attr,
 943         &sys_reipl_nss_vmparm_attr.attr,
 944         NULL,
 945 };
 946
 947 static struct attribute_group reipl_nss_attr_group = {
 948         .name  = IPL_NSS_STR,
 949         .attrs = reipl_nss_attrs,
 950 };
 951
 952 /* reipl type */
 953
 954 static int reipl_set_type(enum ipl_type type)
 955 {
 956         if (!(reipl_capabilities & type))
 957                 return -EINVAL;
 958
 959         switch(type) {
 960         case IPL_TYPE_CCW:
 961                 if (diag308_set_works)
 962                         reipl_method = REIPL_METHOD_CCW_DIAG;
 963                 else if (MACHINE_IS_VM)
 964                         reipl_method = REIPL_METHOD_CCW_VM;
 965                 else
 966                         reipl_method = REIPL_METHOD_CCW_CIO;
 967                 reipl_block_actual = reipl_block_ccw;
 968                 break;
 969         case IPL_TYPE_FCP:
 970                 if (diag308_set_works)
 971                         reipl_method = REIPL_METHOD_FCP_RW_DIAG;
 972                 else if (MACHINE_IS_VM)
 973                         reipl_method = REIPL_METHOD_FCP_RO_VM;
 974                 else
 975                         reipl_method = REIPL_METHOD_FCP_RO_DIAG;
 976                 reipl_block_actual = reipl_block_fcp;
 977                 break;
 978         case IPL_TYPE_FCP_DUMP:
 979                 reipl_method = REIPL_METHOD_FCP_DUMP;
 980                 break;
 981         case IPL_TYPE_NSS:
 982                 if (diag308_set_works)
 983                         reipl_method = REIPL_METHOD_NSS_DIAG;
 984                 else
 985                         reipl_method = REIPL_METHOD_NSS;
 986                 reipl_block_actual = reipl_block_nss;
 987                 break;
 988         case IPL_TYPE_UNKNOWN:
 989                 reipl_method = REIPL_METHOD_DEFAULT;
 990                 break;
 991         default:
 992                 BUG();
 993         }
 994         reipl_type = type;
 995         return 0;
 996 }
 997
 998 static ssize_t reipl_type_show(struct kobject *kobj,
 999                                struct kobj_attribute *attr, char *page)
1000 {
1001         return sprintf(page, "%s\n", ipl_type_str(reipl_type));
1002 }
1003
1004 static ssize_t reipl_type_store(struct kobject *kobj,
1005                                 struct kobj_attribute *attr,
1006                                 const char *buf, size_t len)
1007 {
1008         int rc = -EINVAL;
1009
1010         if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1011                 rc = reipl_set_type(IPL_TYPE_CCW);
1012         else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1013                 rc = reipl_set_type(IPL_TYPE_FCP);
1014         else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1015                 rc = reipl_set_type(IPL_TYPE_NSS);
1016         return (rc != 0) ? rc : len;
1017 }
1018
1019 static struct kobj_attribute reipl_type_attr =
1020         __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
1021
1022 static struct kset *reipl_kset;
1023 static struct kset *reipl_fcp_kset;
1024
1025 static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
1026                            const enum ipl_method m)
1027 {
1028         char loadparm[LOADPARM_LEN + 1] = {};
1029         char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
1030         char nss_name[NSS_NAME_SIZE + 1] = {};
1031         size_t pos = 0;
1032
1033         reipl_get_ascii_loadparm(loadparm, ipb);
1034         reipl_get_ascii_nss_name(nss_name, ipb);
1035         reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
1036
1037         switch (m) {
1038         case REIPL_METHOD_CCW_VM:
1039                 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
1040                 break;
1041         case REIPL_METHOD_NSS:
1042                 pos = sprintf(dst, "IPL %s", nss_name);
1043                 break;
1044         default:
1045                 break;
1046         }
1047         if (strlen(loadparm) > 0)
1048                 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
1049         if (strlen(vmparm) > 0)
1050                 sprintf(dst + pos, " PARM %s", vmparm);
1051 }
1052
1053 static void __reipl_run(void *unused)
1054 {
1055         struct ccw_dev_id devid;
1056         static char buf[128];
1057
1058         switch (reipl_method) {
1059         case REIPL_METHOD_CCW_CIO:
1060                 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
1061                 devid.ssid  = 0;
1062                 reipl_ccw_dev(&devid);
1063                 break;
1064         case REIPL_METHOD_CCW_VM:
1065                 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
1066                 __cpcmd(buf, NULL, 0, NULL);
1067                 break;
1068         case REIPL_METHOD_CCW_DIAG:
1069                 diag308(DIAG308_SET, reipl_block_ccw);
1070                 diag308(DIAG308_IPL, NULL);
1071                 break;
1072         case REIPL_METHOD_FCP_RW_DIAG:
1073                 diag308(DIAG308_SET, reipl_block_fcp);
1074                 diag308(DIAG308_IPL, NULL);
1075                 break;
1076         case REIPL_METHOD_FCP_RO_DIAG:
1077                 diag308(DIAG308_IPL, NULL);
1078                 break;
1079         case REIPL_METHOD_FCP_RO_VM:
1080                 __cpcmd("IPL", NULL, 0, NULL);
1081                 break;
1082         case REIPL_METHOD_NSS_DIAG:
1083                 diag308(DIAG308_SET, reipl_block_nss);
1084                 diag308(DIAG308_IPL, NULL);
1085                 break;
1086         case REIPL_METHOD_NSS:
1087                 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
1088                 __cpcmd(buf, NULL, 0, NULL);
1089                 break;
1090         case REIPL_METHOD_DEFAULT:
1091                 if (MACHINE_IS_VM)
1092                         __cpcmd("IPL", NULL, 0, NULL);
1093                 diag308(DIAG308_IPL, NULL);
1094                 break;
1095         case REIPL_METHOD_FCP_DUMP:
1096                 break;
1097         }
1098         disabled_wait((unsigned long) __builtin_return_address(0));
1099 }
1100
1101 static void reipl_run(struct shutdown_trigger *trigger)
1102 {
1103         smp_switch_to_ipl_cpu(__reipl_run, NULL);
1104 }
1105
1106 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
1107 {
1108         ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
1109         ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1110         ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1111         ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1112 }
1113
1114 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1115 {
1116         /* LOADPARM */
1117         /* check if read scp info worked and set loadparm */
1118         if (sclp_ipl_info.is_valid)
1119                 memcpy(ipb->ipl_info.ccw.load_parm,
1120                                 &sclp_ipl_info.loadparm, LOADPARM_LEN);
1121         else
1122                 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1123                 memset(ipb->ipl_info.ccw.load_parm, 0x40, LOADPARM_LEN);
1124         ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
1125
1126         /* VM PARM */
1127         if (MACHINE_IS_VM && diag308_set_works &&
1128             (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1129
1130                 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1131                 ipb->ipl_info.ccw.vm_parm_len =
1132                                         ipl_block.ipl_info.ccw.vm_parm_len;
1133                 memcpy(ipb->ipl_info.ccw.vm_parm,
1134                        ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1135         }
1136 }
1137
1138 static int __init reipl_nss_init(void)
1139 {
1140         int rc;
1141
1142         if (!MACHINE_IS_VM)
1143                 return 0;
1144
1145         reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1146         if (!reipl_block_nss)
1147                 return -ENOMEM;
1148
1149         if (!diag308_set_works)
1150                 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO;
1151
1152         rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1153         if (rc)
1154                 return rc;
1155
1156         reipl_block_ccw_init(reipl_block_nss);
1157         if (ipl_info.type == IPL_TYPE_NSS) {
1158                 memset(reipl_block_nss->ipl_info.ccw.nss_name,
1159                         ' ', NSS_NAME_SIZE);
1160                 memcpy(reipl_block_nss->ipl_info.ccw.nss_name,
1161                         kernel_nss_name, strlen(kernel_nss_name));
1162                 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
1163                 reipl_block_nss->ipl_info.ccw.vm_flags |=
1164                         DIAG308_VM_FLAGS_NSS_VALID;
1165
1166                 reipl_block_ccw_fill_parms(reipl_block_nss);
1167         }
1168
1169         reipl_capabilities |= IPL_TYPE_NSS;
1170         return 0;
1171 }
1172
1173 static int __init reipl_ccw_init(void)
1174 {
1175         int rc;
1176
1177         reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1178         if (!reipl_block_ccw)
1179                 return -ENOMEM;
1180
1181         if (MACHINE_IS_VM) {
1182                 if (!diag308_set_works)
1183                         sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
1184                 rc = sysfs_create_group(&reipl_kset->kobj,
1185                                         &reipl_ccw_attr_group_vm);
1186         } else {
1187                 if(!diag308_set_works)
1188                         sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
1189                 rc = sysfs_create_group(&reipl_kset->kobj,
1190                                         &reipl_ccw_attr_group_lpar);
1191         }
1192         if (rc)
1193                 return rc;
1194
1195         reipl_block_ccw_init(reipl_block_ccw);
1196         if (ipl_info.type == IPL_TYPE_CCW) {
1197                 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
1198                 reipl_block_ccw_fill_parms(reipl_block_ccw);
1199         }
1200
1201         reipl_capabilities |= IPL_TYPE_CCW;
1202         return 0;
1203 }
1204
1205 static int __init reipl_fcp_init(void)
1206 {
1207         int rc;
1208
1209         if (!diag308_set_works) {
1210                 if (ipl_info.type == IPL_TYPE_FCP) {
1211                         make_attrs_ro(reipl_fcp_attrs);
1212                         sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO;
1213                 } else
1214                         return 0;
1215         }
1216
1217         reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1218         if (!reipl_block_fcp)
1219                 return -ENOMEM;
1220
1221         /* sysfs: create fcp kset for mixing attr group and bin attrs */
1222         reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1223                                              &reipl_kset->kobj);
1224         if (!reipl_fcp_kset) {
1225                 free_page((unsigned long) reipl_block_fcp);
1226                 return -ENOMEM;
1227         }
1228
1229         rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1230         if (rc) {
1231                 kset_unregister(reipl_fcp_kset);
1232                 free_page((unsigned long) reipl_block_fcp);
1233                 return rc;
1234         }
1235
1236         rc = sysfs_create_bin_file(&reipl_fcp_kset->kobj,
1237                                    &sys_reipl_fcp_scp_data_attr);
1238         if (rc) {
1239                 sysfs_remove_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1240                 kset_unregister(reipl_fcp_kset);
1241                 free_page((unsigned long) reipl_block_fcp);
1242                 return rc;
1243         }
1244
1245         if (ipl_info.type == IPL_TYPE_FCP)
1246                 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
1247         else {
1248                 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1249                 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1250                 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1251                 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1252                 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1253         }
1254         reipl_capabilities |= IPL_TYPE_FCP;
1255         return 0;
1256 }
1257
1258 static int __init reipl_init(void)
1259 {
1260         int rc;
1261
1262         reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1263         if (!reipl_kset)
1264                 return -ENOMEM;
1265         rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1266         if (rc) {
1267                 kset_unregister(reipl_kset);
1268                 return rc;
1269         }
1270         rc = reipl_ccw_init();
1271         if (rc)
1272                 return rc;
1273         rc = reipl_fcp_init();
1274         if (rc)
1275                 return rc;
1276         rc = reipl_nss_init();
1277         if (rc)
1278                 return rc;
1279         rc = reipl_set_type(ipl_info.type);
1280         if (rc)
1281                 return rc;
1282         return 0;
1283 }
1284
1285 static struct shutdown_action __refdata reipl_action = {
1286         .name   = SHUTDOWN_ACTION_REIPL_STR,
1287         .fn     = reipl_run,
1288         .init   = reipl_init,
1289 };
1290
1291 /*
1292  * dump shutdown action: Dump Linux on shutdown.
1293  */
1294
1295 /* FCP dump device attributes */
1296
1297 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n",
1298                    dump_block_fcp->ipl_info.fcp.wwpn);
1299 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n",
1300                    dump_block_fcp->ipl_info.fcp.lun);
1301 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1302                    dump_block_fcp->ipl_info.fcp.bootprog);
1303 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1304                    dump_block_fcp->ipl_info.fcp.br_lba);
1305 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1306                    dump_block_fcp->ipl_info.fcp.devno);
1307
1308 static struct attribute *dump_fcp_attrs[] = {
1309         &sys_dump_fcp_device_attr.attr,
1310         &sys_dump_fcp_wwpn_attr.attr,
1311         &sys_dump_fcp_lun_attr.attr,
1312         &sys_dump_fcp_bootprog_attr.attr,
1313         &sys_dump_fcp_br_lba_attr.attr,
1314         NULL,
1315 };
1316
1317 static struct attribute_group dump_fcp_attr_group = {
1318         .name  = IPL_FCP_STR,
1319         .attrs = dump_fcp_attrs,
1320 };
1321
1322 /* CCW dump device attributes */
1323
1324 DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
1325                    dump_block_ccw->ipl_info.ccw.devno);
1326
1327 static struct attribute *dump_ccw_attrs[] = {
1328         &sys_dump_ccw_device_attr.attr,
1329         NULL,
1330 };
1331
1332 static struct attribute_group dump_ccw_attr_group = {
1333         .name  = IPL_CCW_STR,
1334         .attrs = dump_ccw_attrs,
1335 };
1336
1337 /* dump type */
1338
1339 static int dump_set_type(enum dump_type type)
1340 {
1341         if (!(dump_capabilities & type))
1342                 return -EINVAL;
1343         switch (type) {
1344         case DUMP_TYPE_CCW:
1345                 if (diag308_set_works)
1346                         dump_method = DUMP_METHOD_CCW_DIAG;
1347                 else if (MACHINE_IS_VM)
1348                         dump_method = DUMP_METHOD_CCW_VM;
1349                 else
1350                         dump_method = DUMP_METHOD_CCW_CIO;
1351                 break;
1352         case DUMP_TYPE_FCP:
1353                 dump_method = DUMP_METHOD_FCP_DIAG;
1354                 break;
1355         default:
1356                 dump_method = DUMP_METHOD_NONE;
1357         }
1358         dump_type = type;
1359         return 0;
1360 }
1361
1362 static ssize_t dump_type_show(struct kobject *kobj,
1363                               struct kobj_attribute *attr, char *page)
1364 {
1365         return sprintf(page, "%s\n", dump_type_str(dump_type));
1366 }
1367
1368 static ssize_t dump_type_store(struct kobject *kobj,
1369                                struct kobj_attribute *attr,
1370                                const char *buf, size_t len)
1371 {
1372         int rc = -EINVAL;
1373
1374         if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1375                 rc = dump_set_type(DUMP_TYPE_NONE);
1376         else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1377                 rc = dump_set_type(DUMP_TYPE_CCW);
1378         else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1379                 rc = dump_set_type(DUMP_TYPE_FCP);
1380         return (rc != 0) ? rc : len;
1381 }
1382
1383 static struct kobj_attribute dump_type_attr =
1384         __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1385
1386 static struct kset *dump_kset;
1387
1388 static void __dump_run(void *unused)
1389 {
1390         struct ccw_dev_id devid;
1391         static char buf[100];
1392
1393         switch (dump_method) {
1394         case DUMP_METHOD_CCW_CIO:
1395                 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
1396                 devid.ssid  = 0;
1397                 reipl_ccw_dev(&devid);
1398                 break;
1399         case DUMP_METHOD_CCW_VM:
1400                 sprintf(buf, "STORE STATUS");
1401                 __cpcmd(buf, NULL, 0, NULL);
1402                 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
1403                 __cpcmd(buf, NULL, 0, NULL);
1404                 break;
1405         case DUMP_METHOD_CCW_DIAG:
1406                 diag308(DIAG308_SET, dump_block_ccw);
1407                 diag308(DIAG308_DUMP, NULL);
1408                 break;
1409         case DUMP_METHOD_FCP_DIAG:
1410                 diag308(DIAG308_SET, dump_block_fcp);
1411                 diag308(DIAG308_DUMP, NULL);
1412                 break;
1413         default:
1414                 break;
1415         }
1416 }
1417
1418 static void dump_run(struct shutdown_trigger *trigger)
1419 {
1420         if (dump_method == DUMP_METHOD_NONE)
1421                 return;
1422         smp_send_stop();
1423         smp_switch_to_ipl_cpu(__dump_run, NULL);
1424 }
1425
1426 static int __init dump_ccw_init(void)
1427 {
1428         int rc;
1429
1430         dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1431         if (!dump_block_ccw)
1432                 return -ENOMEM;
1433         rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1434         if (rc) {
1435                 free_page((unsigned long)dump_block_ccw);
1436                 return rc;
1437         }
1438         dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1439         dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1440         dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1441         dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1442         dump_capabilities |= DUMP_TYPE_CCW;
1443         return 0;
1444 }
1445
1446 static int __init dump_fcp_init(void)
1447 {
1448         int rc;
1449
1450         if (!sclp_ipl_info.has_dump)
1451                 return 0; /* LDIPL DUMP is not installed */
1452         if (!diag308_set_works)
1453                 return 0;
1454         dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1455         if (!dump_block_fcp)
1456                 return -ENOMEM;
1457         rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1458         if (rc) {
1459                 free_page((unsigned long)dump_block_fcp);
1460                 return rc;
1461         }
1462         dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1463         dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1464         dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1465         dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1466         dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1467         dump_capabilities |= DUMP_TYPE_FCP;
1468         return 0;
1469 }
1470
1471 static int __init dump_init(void)
1472 {
1473         int rc;
1474
1475         dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1476         if (!dump_kset)
1477                 return -ENOMEM;
1478         rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1479         if (rc) {
1480                 kset_unregister(dump_kset);
1481                 return rc;
1482         }
1483         rc = dump_ccw_init();
1484         if (rc)
1485                 return rc;
1486         rc = dump_fcp_init();
1487         if (rc)
1488                 return rc;
1489         dump_set_type(DUMP_TYPE_NONE);
1490         return 0;
1491 }
1492
1493 static struct shutdown_action __refdata dump_action = {
1494         .name   = SHUTDOWN_ACTION_DUMP_STR,
1495         .fn     = dump_run,
1496         .init   = dump_init,
1497 };
1498
1499 static void dump_reipl_run(struct shutdown_trigger *trigger)
1500 {
1501         preempt_disable();
1502         /*
1503          * Bypass dynamic address translation (DAT) when storing IPL parameter
1504          * information block address and checksum into the prefix area
1505          * (corresponding to absolute addresses 0-8191).
1506          * When enhanced DAT applies and the STE format control in one,
1507          * the absolute address is formed without prefixing. In this case a
1508          * normal store (stg/st) into the prefix area would no more match to
1509          * absolute addresses 0-8191.
1510          */
1511 #ifdef CONFIG_64BIT
1512         asm volatile("sturg %0,%1"
1513                 :: "a" ((unsigned long) reipl_block_actual),
1514                 "a" (&lowcore_ptr[smp_processor_id()]->ipib));
1515 #else
1516         asm volatile("stura %0,%1"
1517                 :: "a" ((unsigned long) reipl_block_actual),
1518                 "a" (&lowcore_ptr[smp_processor_id()]->ipib));
1519 #endif
1520         asm volatile("stura %0,%1"
1521                 :: "a" (csum_partial(reipl_block_actual,
1522                                      reipl_block_actual->hdr.len, 0)),
1523                 "a" (&lowcore_ptr[smp_processor_id()]->ipib_checksum));
1524         preempt_enable();
1525         dump_run(trigger);
1526 }
1527
1528 static int __init dump_reipl_init(void)
1529 {
1530         if (!diag308_set_works)
1531                 return -EOPNOTSUPP;
1532         else
1533                 return 0;
1534 }
1535
1536 static struct shutdown_action __refdata dump_reipl_action = {
1537         .name   = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1538         .fn     = dump_reipl_run,
1539         .init   = dump_reipl_init,
1540 };
1541
1542 /*
1543  * vmcmd shutdown action: Trigger vm command on shutdown.
1544  */
1545
1546 static char vmcmd_on_reboot[128];
1547 static char vmcmd_on_panic[128];
1548 static char vmcmd_on_halt[128];
1549 static char vmcmd_on_poff[128];
1550 static char vmcmd_on_restart[128];
1551
1552 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1553 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1554 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1555 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1556 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1557
1558 static struct attribute *vmcmd_attrs[] = {
1559         &sys_vmcmd_on_reboot_attr.attr,
1560         &sys_vmcmd_on_panic_attr.attr,
1561         &sys_vmcmd_on_halt_attr.attr,
1562         &sys_vmcmd_on_poff_attr.attr,
1563         &sys_vmcmd_on_restart_attr.attr,
1564         NULL,
1565 };
1566
1567 static struct attribute_group vmcmd_attr_group = {
1568         .attrs = vmcmd_attrs,
1569 };
1570
1571 static struct kset *vmcmd_kset;
1572
1573 static void vmcmd_run(struct shutdown_trigger *trigger)
1574 {
1575         char *cmd, *next_cmd;
1576
1577         if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1578                 cmd = vmcmd_on_reboot;
1579         else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1580                 cmd = vmcmd_on_panic;
1581         else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1582                 cmd = vmcmd_on_halt;
1583         else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1584                 cmd = vmcmd_on_poff;
1585         else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
1586                 cmd = vmcmd_on_restart;
1587         else
1588                 return;
1589
1590         if (strlen(cmd) == 0)
1591                 return;
1592         do {
1593                 next_cmd = strchr(cmd, '\n');
1594                 if (next_cmd) {
1595                         next_cmd[0] = 0;
1596                         next_cmd += 1;
1597                 }
1598                 __cpcmd(cmd, NULL, 0, NULL);
1599                 cmd = next_cmd;
1600         } while (cmd != NULL);
1601 }
1602
1603 static int vmcmd_init(void)
1604 {
1605         if (!MACHINE_IS_VM)
1606                 return -EOPNOTSUPP;
1607         vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1608         if (!vmcmd_kset)
1609                 return -ENOMEM;
1610         return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1611 }
1612
1613 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1614                                               vmcmd_run, vmcmd_init};
1615
1616 /*
1617  * stop shutdown action: Stop Linux on shutdown.
1618  */
1619
1620 static void stop_run(struct shutdown_trigger *trigger)
1621 {
1622         if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
1623             strcmp(trigger->name, ON_RESTART_STR) == 0)
1624                 disabled_wait((unsigned long) __builtin_return_address(0));
1625         while (sigp(smp_processor_id(), sigp_stop) == sigp_busy)
1626                 cpu_relax();
1627         for (;;);
1628 }
1629
1630 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1631                                              stop_run, NULL};
1632
1633 /* action list */
1634
1635 static struct shutdown_action *shutdown_actions_list[] = {
1636         &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1637         &vmcmd_action, &stop_action};
1638 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1639
1640 /*
1641  * Trigger section
1642  */
1643
1644 static struct kset *shutdown_actions_kset;
1645
1646 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1647                        size_t len)
1648 {
1649         int i;
1650
1651         for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1652                 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1653                         if (shutdown_actions_list[i]->init_rc) {
1654                                 return shutdown_actions_list[i]->init_rc;
1655                         } else {
1656                                 trigger->action = shutdown_actions_list[i];
1657                                 return len;
1658                         }
1659                 }
1660         }
1661         return -EINVAL;
1662 }
1663
1664 /* on reipl */
1665
1666 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1667                                                     &reipl_action};
1668
1669 static ssize_t on_reboot_show(struct kobject *kobj,
1670                               struct kobj_attribute *attr, char *page)
1671 {
1672         return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1673 }
1674
1675 static ssize_t on_reboot_store(struct kobject *kobj,
1676                                struct kobj_attribute *attr,
1677                                const char *buf, size_t len)
1678 {
1679         return set_trigger(buf, &on_reboot_trigger, len);
1680 }
1681
1682 static struct kobj_attribute on_reboot_attr =
1683         __ATTR(on_reboot, 0644, on_reboot_show, on_reboot_store);
1684
1685 static void do_machine_restart(char *__unused)
1686 {
1687         smp_send_stop();
1688         on_reboot_trigger.action->fn(&on_reboot_trigger);
1689         reipl_run(NULL);
1690 }
1691 void (*_machine_restart)(char *command) = do_machine_restart;
1692
1693 /* on panic */
1694
1695 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1696
1697 static ssize_t on_panic_show(struct kobject *kobj,
1698                              struct kobj_attribute *attr, char *page)
1699 {
1700         return sprintf(page, "%s\n", on_panic_trigger.action->name);
1701 }
1702
1703 static ssize_t on_panic_store(struct kobject *kobj,
1704                               struct kobj_attribute *attr,
1705                               const char *buf, size_t len)
1706 {
1707         return set_trigger(buf, &on_panic_trigger, len);
1708 }
1709
1710 static struct kobj_attribute on_panic_attr =
1711         __ATTR(on_panic, 0644, on_panic_show, on_panic_store);
1712
1713 static void do_panic(void)
1714 {
1715         on_panic_trigger.action->fn(&on_panic_trigger);
1716         stop_run(&on_panic_trigger);
1717 }
1718
1719 /* on restart */
1720
1721 static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
1722         &stop_action};
1723
1724 static ssize_t on_restart_show(struct kobject *kobj,
1725                                struct kobj_attribute *attr, char *page)
1726 {
1727         return sprintf(page, "%s\n", on_restart_trigger.action->name);
1728 }
1729
1730 static ssize_t on_restart_store(struct kobject *kobj,
1731                                 struct kobj_attribute *attr,
1732                                 const char *buf, size_t len)
1733 {
1734         return set_trigger(buf, &on_restart_trigger, len);
1735 }
1736
1737 static struct kobj_attribute on_restart_attr =
1738         __ATTR(on_restart, 0644, on_restart_show, on_restart_store);
1739
1740 void do_restart(void)
1741 {
1742         smp_restart_with_online_cpu();
1743         smp_send_stop();
1744 #ifdef CONFIG_CRASH_DUMP
1745         crash_kexec(NULL);
1746 #endif
1747         on_restart_trigger.action->fn(&on_restart_trigger);
1748         stop_run(&on_restart_trigger);
1749 }
1750
1751 /* on halt */
1752
1753 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1754
1755 static ssize_t on_halt_show(struct kobject *kobj,
1756                             struct kobj_attribute *attr, char *page)
1757 {
1758         return sprintf(page, "%s\n", on_halt_trigger.action->name);
1759 }
1760
1761 static ssize_t on_halt_store(struct kobject *kobj,
1762                              struct kobj_attribute *attr,
1763                              const char *buf, size_t len)
1764 {
1765         return set_trigger(buf, &on_halt_trigger, len);
1766 }
1767
1768 static struct kobj_attribute on_halt_attr =
1769         __ATTR(on_halt, 0644, on_halt_show, on_halt_store);
1770
1771
1772 static void do_machine_halt(void)
1773 {
1774         smp_send_stop();
1775         on_halt_trigger.action->fn(&on_halt_trigger);
1776         stop_run(&on_halt_trigger);
1777 }
1778 void (*_machine_halt)(void) = do_machine_halt;
1779
1780 /* on power off */
1781
1782 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1783
1784 static ssize_t on_poff_show(struct kobject *kobj,
1785                             struct kobj_attribute *attr, char *page)
1786 {
1787         return sprintf(page, "%s\n", on_poff_trigger.action->name);
1788 }
1789
1790 static ssize_t on_poff_store(struct kobject *kobj,
1791                              struct kobj_attribute *attr,
1792                              const char *buf, size_t len)
1793 {
1794         return set_trigger(buf, &on_poff_trigger, len);
1795 }
1796
1797 static struct kobj_attribute on_poff_attr =
1798         __ATTR(on_poff, 0644, on_poff_show, on_poff_store);
1799
1800
1801 static void do_machine_power_off(void)
1802 {
1803         smp_send_stop();
1804         on_poff_trigger.action->fn(&on_poff_trigger);
1805         stop_run(&on_poff_trigger);
1806 }
1807 void (*_machine_power_off)(void) = do_machine_power_off;
1808
1809 static void __init shutdown_triggers_init(void)
1810 {
1811         shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1812                                                     firmware_kobj);
1813         if (!shutdown_actions_kset)
1814                 goto fail;
1815         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1816                               &on_reboot_attr.attr))
1817                 goto fail;
1818         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1819                               &on_panic_attr.attr))
1820                 goto fail;
1821         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1822                               &on_halt_attr.attr))
1823                 goto fail;
1824         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1825                               &on_poff_attr.attr))
1826                 goto fail;
1827         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1828                               &on_restart_attr.attr))
1829                 goto fail;
1830         return;
1831 fail:
1832         panic("shutdown_triggers_init failed\n");
1833 }
1834
1835 static void __init shutdown_actions_init(void)
1836 {
1837         int i;
1838
1839         for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1840                 if (!shutdown_actions_list[i]->init)
1841                         continue;
1842                 shutdown_actions_list[i]->init_rc =
1843                         shutdown_actions_list[i]->init();
1844         }
1845 }
1846
1847 static int __init s390_ipl_init(void)
1848 {
1849         sclp_get_ipl_info(&sclp_ipl_info);
1850         shutdown_actions_init();
1851         shutdown_triggers_init();
1852         return 0;
1853 }
1854
1855 __initcall(s390_ipl_init);
1856
1857 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1858 {
1859         int sx, dx;
1860
1861         dx = 0;
1862         for (sx = 0; src[sx] != 0; sx++) {
1863                 if (src[sx] == '"')
1864                         continue;
1865                 dst[dx++] = src[sx];
1866                 if (dx >= n)
1867                         break;
1868         }
1869 }
1870
1871 static int __init vmcmd_on_reboot_setup(char *str)
1872 {
1873         if (!MACHINE_IS_VM)
1874                 return 1;
1875         strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1876         vmcmd_on_reboot[127] = 0;
1877         on_reboot_trigger.action = &vmcmd_action;
1878         return 1;
1879 }
1880 __setup("vmreboot=", vmcmd_on_reboot_setup);
1881
1882 static int __init vmcmd_on_panic_setup(char *str)
1883 {
1884         if (!MACHINE_IS_VM)
1885                 return 1;
1886         strncpy_skip_quote(vmcmd_on_panic, str, 127);
1887         vmcmd_on_panic[127] = 0;
1888         on_panic_trigger.action = &vmcmd_action;
1889         return 1;
1890 }
1891 __setup("vmpanic=", vmcmd_on_panic_setup);
1892
1893 static int __init vmcmd_on_halt_setup(char *str)
1894 {
1895         if (!MACHINE_IS_VM)
1896                 return 1;
1897         strncpy_skip_quote(vmcmd_on_halt, str, 127);
1898         vmcmd_on_halt[127] = 0;
1899         on_halt_trigger.action = &vmcmd_action;
1900         return 1;
1901 }
1902 __setup("vmhalt=", vmcmd_on_halt_setup);
1903
1904 static int __init vmcmd_on_poff_setup(char *str)
1905 {
1906         if (!MACHINE_IS_VM)
1907                 return 1;
1908         strncpy_skip_quote(vmcmd_on_poff, str, 127);
1909         vmcmd_on_poff[127] = 0;
1910         on_poff_trigger.action = &vmcmd_action;
1911         return 1;
1912 }
1913 __setup("vmpoff=", vmcmd_on_poff_setup);
1914
1915 static int on_panic_notify(struct notifier_block *self,
1916                            unsigned long event, void *data)
1917 {
1918         do_panic();
1919         return NOTIFY_OK;
1920 }
1921
1922 static struct notifier_block on_panic_nb = {
1923         .notifier_call = on_panic_notify,
1924         .priority = INT_MIN,
1925 };
1926
1927 void __init setup_ipl(void)
1928 {
1929         ipl_info.type = get_ipl_type();
1930         switch (ipl_info.type) {
1931         case IPL_TYPE_CCW:
1932                 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1933                 ipl_info.data.ccw.dev_id.ssid = 0;
1934                 break;
1935         case IPL_TYPE_FCP:
1936         case IPL_TYPE_FCP_DUMP:
1937                 ipl_info.data.fcp.dev_id.devno =
1938                         IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1939                 ipl_info.data.fcp.dev_id.ssid = 0;
1940                 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1941                 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1942                 break;
1943         case IPL_TYPE_NSS:
1944                 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1945                         sizeof(ipl_info.data.nss.name));
1946                 break;
1947         case IPL_TYPE_UNKNOWN:
1948                 /* We have no info to copy */
1949                 break;
1950         }
1951         atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1952 }
1953
1954 void __init ipl_update_parameters(void)
1955 {
1956         int rc;
1957
1958         rc = diag308(DIAG308_STORE, &ipl_block);
1959         if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
1960                 diag308_set_works = 1;
1961 }
1962
1963 void __init ipl_save_parameters(void)
1964 {
1965         struct cio_iplinfo iplinfo;
1966         void *src, *dst;
1967
1968         if (cio_get_iplinfo(&iplinfo))
1969                 return;
1970
1971         ipl_devno = iplinfo.devno;
1972         ipl_flags |= IPL_DEVNO_VALID;
1973         if (!iplinfo.is_qdio)
1974                 return;
1975         ipl_flags |= IPL_PARMBLOCK_VALID;
1976         src = (void *)(unsigned long)S390_lowcore.ipl_parmblock_ptr;
1977         dst = (void *)IPL_PARMBLOCK_ORIGIN;
1978         memmove(dst, src, PAGE_SIZE);
1979         S390_lowcore.ipl_parmblock_ptr = IPL_PARMBLOCK_ORIGIN;
1980 }
1981
1982 static LIST_HEAD(rcall);
1983 static DEFINE_MUTEX(rcall_mutex);
1984
1985 void register_reset_call(struct reset_call *reset)
1986 {
1987         mutex_lock(&rcall_mutex);
1988         list_add(&reset->list, &rcall);
1989         mutex_unlock(&rcall_mutex);
1990 }
1991 EXPORT_SYMBOL_GPL(register_reset_call);
1992
1993 void unregister_reset_call(struct reset_call *reset)
1994 {
1995         mutex_lock(&rcall_mutex);
1996         list_del(&reset->list);
1997         mutex_unlock(&rcall_mutex);
1998 }
1999 EXPORT_SYMBOL_GPL(unregister_reset_call);
2000
2001 static void do_reset_calls(void)
2002 {
2003         struct reset_call *reset;
2004
2005 #ifdef CONFIG_64BIT
2006         if (diag308_set_works) {
2007                 diag308_reset();
2008                 return;
2009         }
2010 #endif
2011         list_for_each_entry(reset, &rcall, list)
2012                 reset->fn();
2013 }
2014
2015 u32 dump_prefix_page;
2016
2017 void s390_reset_system(void (*func)(void *), void *data)
2018 {
2019         struct _lowcore *lc;
2020
2021         lc = (struct _lowcore *)(unsigned long) store_prefix();
2022
2023         /* Stack for interrupt/machine check handler */
2024         lc->panic_stack = S390_lowcore.panic_stack;
2025
2026         /* Save prefix page address for dump case */
2027         dump_prefix_page = (u32)(unsigned long) lc;
2028
2029         /* Disable prefixing */
2030         set_prefix(0);
2031
2032         /* Disable lowcore protection */
2033         __ctl_clear_bit(0,28);
2034
2035         /* Set new machine check handler */
2036         S390_lowcore.mcck_new_psw.mask = psw_kernel_bits | PSW_MASK_DAT;
2037         S390_lowcore.mcck_new_psw.addr =
2038                 PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;
2039
2040         /* Set new program check handler */
2041         S390_lowcore.program_new_psw.mask = psw_kernel_bits | PSW_MASK_DAT;
2042         S390_lowcore.program_new_psw.addr =
2043                 PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
2044
2045         /* Store status at absolute zero */
2046         store_status();
2047
2048         do_reset_calls();
2049         if (func)
2050                 func(data);
2051 }