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 #include "entry.h"
  31
  32 #define IPL_PARM_BLOCK_VERSION 0
  33
  34 #define IPL_UNKNOWN_STR         "unknown"
  35 #define IPL_CCW_STR             "ccw"
  36 #define IPL_FCP_STR             "fcp"
  37 #define IPL_FCP_DUMP_STR        "fcp_dump"
  38 #define IPL_NSS_STR             "nss"
  39
  40 #define DUMP_CCW_STR            "ccw"
  41 #define DUMP_FCP_STR            "fcp"
  42 #define DUMP_NONE_STR           "none"
  43
  44 /*
  45  * Four shutdown trigger types are supported:
  46  * - panic
  47  * - halt
  48  * - power off
  49  * - reipl
  50  * - restart
  51  */
  52 #define ON_PANIC_STR            "on_panic"
  53 #define ON_HALT_STR             "on_halt"
  54 #define ON_POFF_STR             "on_poff"
  55 #define ON_REIPL_STR            "on_reboot"
  56 #define ON_RESTART_STR          "on_restart"
  57
  58 struct shutdown_action;
  59 struct shutdown_trigger {
  60         char *name;
  61         struct shutdown_action *action;
  62 };
  63
  64 /*
  65  * The following shutdown action types are supported:
  66  */
  67 #define SHUTDOWN_ACTION_IPL_STR         "ipl"
  68 #define SHUTDOWN_ACTION_REIPL_STR       "reipl"
  69 #define SHUTDOWN_ACTION_DUMP_STR        "dump"
  70 #define SHUTDOWN_ACTION_VMCMD_STR       "vmcmd"
  71 #define SHUTDOWN_ACTION_STOP_STR        "stop"
  72 #define SHUTDOWN_ACTION_DUMP_REIPL_STR  "dump_reipl"
  73
  74 struct shutdown_action {
  75         char *name;
  76         void (*fn) (struct shutdown_trigger *trigger);
  77         int (*init) (void);
  78         int init_rc;
  79 };
  80
  81 static char *ipl_type_str(enum ipl_type type)
  82 {
  83         switch (type) {
  84         case IPL_TYPE_CCW:
  85                 return IPL_CCW_STR;
  86         case IPL_TYPE_FCP:
  87                 return IPL_FCP_STR;
  88         case IPL_TYPE_FCP_DUMP:
  89                 return IPL_FCP_DUMP_STR;
  90         case IPL_TYPE_NSS:
  91                 return IPL_NSS_STR;
  92         case IPL_TYPE_UNKNOWN:
  93         default:
  94                 return IPL_UNKNOWN_STR;
  95         }
  96 }
  97
  98 enum dump_type {
  99         DUMP_TYPE_NONE  = 1,
 100         DUMP_TYPE_CCW   = 2,
 101         DUMP_TYPE_FCP   = 4,
 102 };
 103
 104 static char *dump_type_str(enum dump_type type)
 105 {
 106         switch (type) {
 107         case DUMP_TYPE_NONE:
 108                 return DUMP_NONE_STR;
 109         case DUMP_TYPE_CCW:
 110                 return DUMP_CCW_STR;
 111         case DUMP_TYPE_FCP:
 112                 return DUMP_FCP_STR;
 113         default:
 114                 return NULL;
 115         }
 116 }
 117
 118 /*
 119  * Must be in data section since the bss section
 120  * is not cleared when these are accessed.
 121  */
 122 static u16 ipl_devno __attribute__((__section__(".data"))) = 0;
 123 u32 ipl_flags __attribute__((__section__(".data"))) = 0;
 124
 125 enum ipl_method {
 126         REIPL_METHOD_CCW_CIO,
 127         REIPL_METHOD_CCW_DIAG,
 128         REIPL_METHOD_CCW_VM,
 129         REIPL_METHOD_FCP_RO_DIAG,
 130         REIPL_METHOD_FCP_RW_DIAG,
 131         REIPL_METHOD_FCP_RO_VM,
 132         REIPL_METHOD_FCP_DUMP,
 133         REIPL_METHOD_NSS,
 134         REIPL_METHOD_NSS_DIAG,
 135         REIPL_METHOD_DEFAULT,
 136 };
 137
 138 enum dump_method {
 139         DUMP_METHOD_NONE,
 140         DUMP_METHOD_CCW_CIO,
 141         DUMP_METHOD_CCW_DIAG,
 142         DUMP_METHOD_CCW_VM,
 143         DUMP_METHOD_FCP_DIAG,
 144 };
 145
 146 static int diag308_set_works = 0;
 147
 148 static struct ipl_parameter_block ipl_block;
 149
 150 static int reipl_capabilities = IPL_TYPE_UNKNOWN;
 151
 152 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
 153 static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
 154 static struct ipl_parameter_block *reipl_block_fcp;
 155 static struct ipl_parameter_block *reipl_block_ccw;
 156 static struct ipl_parameter_block *reipl_block_nss;
 157 static struct ipl_parameter_block *reipl_block_actual;
 158
 159 static int dump_capabilities = DUMP_TYPE_NONE;
 160 static enum dump_type dump_type = DUMP_TYPE_NONE;
 161 static enum dump_method dump_method = DUMP_METHOD_NONE;
 162 static struct ipl_parameter_block *dump_block_fcp;
 163 static struct ipl_parameter_block *dump_block_ccw;
 164
 165 static struct sclp_ipl_info sclp_ipl_info;
 166
 167 int diag308(unsigned long subcode, void *addr)
 168 {
 169         register unsigned long _addr asm("0") = (unsigned long) addr;
 170         register unsigned long _rc asm("1") = 0;
 171
 172         asm volatile(
 173                 "       diag    %0,%2,0x308\n"
 174                 "0:\n"
 175                 EX_TABLE(0b,0b)
 176                 : "+d" (_addr), "+d" (_rc)
 177                 : "d" (subcode) : "cc", "memory");
 178         return _rc;
 179 }
 180 EXPORT_SYMBOL_GPL(diag308);
 181
 182 /* SYSFS */
 183
 184 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value)             \
 185 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,     \
 186                 struct kobj_attribute *attr,                            \
 187                 char *page)                                             \
 188 {                                                                       \
 189         return sprintf(page, _format, _value);                          \
 190 }                                                                       \
 191 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 192         __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL);
 193
 194 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)   \
 195 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,     \
 196                 struct kobj_attribute *attr,                            \
 197                 char *page)                                             \
 198 {                                                                       \
 199         return sprintf(page, _fmt_out,                                  \
 200                         (unsigned long long) _value);                   \
 201 }                                                                       \
 202 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,    \
 203                 struct kobj_attribute *attr,                            \
 204                 const char *buf, size_t len)                            \
 205 {                                                                       \
 206         unsigned long long value;                                       \
 207         if (sscanf(buf, _fmt_in, &value) != 1)                          \
 208                 return -EINVAL;                                         \
 209         _value = value;                                                 \
 210         return len;                                                     \
 211 }                                                                       \
 212 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 213         __ATTR(_name,(S_IRUGO | S_IWUSR),                               \
 214                         sys_##_prefix##_##_name##_show,                 \
 215                         sys_##_prefix##_##_name##_store);
 216
 217 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
 218 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,     \
 219                 struct kobj_attribute *attr,                            \
 220                 char *page)                                             \
 221 {                                                                       \
 222         return sprintf(page, _fmt_out, _value);                         \
 223 }                                                                       \
 224 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,    \
 225                 struct kobj_attribute *attr,                            \
 226                 const char *buf, size_t len)                            \
 227 {                                                                       \
 228         strncpy(_value, buf, sizeof(_value) - 1);                       \
 229         strim(_value);                                                  \
 230         return len;                                                     \
 231 }                                                                       \
 232 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 233         __ATTR(_name,(S_IRUGO | S_IWUSR),                               \
 234                         sys_##_prefix##_##_name##_show,                 \
 235                         sys_##_prefix##_##_name##_store);
 236
 237 static void make_attrs_ro(struct attribute **attrs)
 238 {
 239         while (*attrs) {
 240                 (*attrs)->mode = S_IRUGO;
 241                 attrs++;
 242         }
 243 }
 244
 245 /*
 246  * ipl section
 247  */
 248
 249 static __init enum ipl_type get_ipl_type(void)
 250 {
 251         struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
 252
 253         if (ipl_flags & IPL_NSS_VALID)
 254                 return IPL_TYPE_NSS;
 255         if (!(ipl_flags & IPL_DEVNO_VALID))
 256                 return IPL_TYPE_UNKNOWN;
 257         if (!(ipl_flags & IPL_PARMBLOCK_VALID))
 258                 return IPL_TYPE_CCW;
 259         if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
 260                 return IPL_TYPE_UNKNOWN;
 261         if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
 262                 return IPL_TYPE_UNKNOWN;
 263         if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
 264                 return IPL_TYPE_FCP_DUMP;
 265         return IPL_TYPE_FCP;
 266 }
 267
 268 struct ipl_info ipl_info;
 269 EXPORT_SYMBOL_GPL(ipl_info);
 270
 271 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
 272                              char *page)
 273 {
 274         return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
 275 }
 276
 277 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
 278
 279 /* VM IPL PARM routines */
 280 static size_t reipl_get_ascii_vmparm(char *dest, size_t size,
 281                                      const struct ipl_parameter_block *ipb)
 282 {
 283         int i;
 284         size_t len;
 285         char has_lowercase = 0;
 286
 287         len = 0;
 288         if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
 289             (ipb->ipl_info.ccw.vm_parm_len > 0)) {
 290
 291                 len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
 292                 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
 293                 /* If at least one character is lowercase, we assume mixed
 294                  * case; otherwise we convert everything to lowercase.
 295                  */
 296                 for (i = 0; i < len; i++)
 297                         if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
 298                             (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
 299                             (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
 300                                 has_lowercase = 1;
 301                                 break;
 302                         }
 303                 if (!has_lowercase)
 304                         EBC_TOLOWER(dest, len);
 305                 EBCASC(dest, len);
 306         }
 307         dest[len] = 0;
 308
 309         return len;
 310 }
 311
 312 size_t append_ipl_vmparm(char *dest, size_t size)
 313 {
 314         size_t rc;
 315
 316         rc = 0;
 317         if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
 318                 rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
 319         else
 320                 dest[0] = 0;
 321         return rc;
 322 }
 323
 324 static ssize_t ipl_vm_parm_show(struct kobject *kobj,
 325                                 struct kobj_attribute *attr, char *page)
 326 {
 327         char parm[DIAG308_VMPARM_SIZE + 1] = {};
 328
 329         append_ipl_vmparm(parm, sizeof(parm));
 330         return sprintf(page, "%s\n", parm);
 331 }
 332
 333 static size_t scpdata_length(const char* buf, size_t count)
 334 {
 335         while (count) {
 336                 if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
 337                         break;
 338                 count--;
 339         }
 340         return count;
 341 }
 342
 343 static size_t reipl_append_ascii_scpdata(char *dest, size_t size,
 344                                          const struct ipl_parameter_block *ipb)
 345 {
 346         size_t count;
 347         size_t i;
 348         int has_lowercase;
 349
 350         count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data,
 351                                              ipb->ipl_info.fcp.scp_data_len));
 352         if (!count)
 353                 goto out;
 354
 355         has_lowercase = 0;
 356         for (i = 0; i < count; i++) {
 357                 if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
 358                         count = 0;
 359                         goto out;
 360                 }
 361                 if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
 362                         has_lowercase = 1;
 363         }
 364
 365         if (has_lowercase)
 366                 memcpy(dest, ipb->ipl_info.fcp.scp_data, count);
 367         else
 368                 for (i = 0; i < count; i++)
 369                         dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]);
 370 out:
 371         dest[count] = '\0';
 372         return count;
 373 }
 374
 375 size_t append_ipl_scpdata(char *dest, size_t len)
 376 {
 377         size_t rc;
 378
 379         rc = 0;
 380         if (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP)
 381                 rc = reipl_append_ascii_scpdata(dest, len, &ipl_block);
 382         else
 383                 dest[0] = 0;
 384         return rc;
 385 }
 386
 387
 388 static struct kobj_attribute sys_ipl_vm_parm_attr =
 389         __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
 390
 391 static ssize_t sys_ipl_device_show(struct kobject *kobj,
 392                                    struct kobj_attribute *attr, char *page)
 393 {
 394         struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
 395
 396         switch (ipl_info.type) {
 397         case IPL_TYPE_CCW:
 398                 return sprintf(page, "0.0.%04x\n", ipl_devno);
 399         case IPL_TYPE_FCP:
 400         case IPL_TYPE_FCP_DUMP:
 401                 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
 402         default:
 403                 return 0;
 404         }
 405 }
 406
 407 static struct kobj_attribute sys_ipl_device_attr =
 408         __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
 409
 410 static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
 411                                   struct bin_attribute *attr, char *buf,
 412                                   loff_t off, size_t count)
 413 {
 414         return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START,
 415                                         IPL_PARMBLOCK_SIZE);
 416 }
 417
 418 static struct bin_attribute ipl_parameter_attr = {
 419         .attr = {
 420                 .name = "binary_parameter",
 421                 .mode = S_IRUGO,
 422         },
 423         .size = PAGE_SIZE,
 424         .read = &ipl_parameter_read,
 425 };
 426
 427 static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
 428                                  struct bin_attribute *attr, char *buf,
 429                                  loff_t off, size_t count)
 430 {
 431         unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
 432         void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
 433
 434         return memory_read_from_buffer(buf, count, &off, scp_data, size);
 435 }
 436
 437 static struct bin_attribute ipl_scp_data_attr = {
 438         .attr = {
 439                 .name = "scp_data",
 440                 .mode = S_IRUGO,
 441         },
 442         .size = PAGE_SIZE,
 443         .read = ipl_scp_data_read,
 444 };
 445
 446 /* FCP ipl device attributes */
 447
 448 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
 449                    IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
 450 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
 451                    IPL_PARMBLOCK_START->ipl_info.fcp.lun);
 452 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
 453                    IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
 454 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
 455                    IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
 456
 457 static struct attribute *ipl_fcp_attrs[] = {
 458         &sys_ipl_type_attr.attr,
 459         &sys_ipl_device_attr.attr,
 460         &sys_ipl_fcp_wwpn_attr.attr,
 461         &sys_ipl_fcp_lun_attr.attr,
 462         &sys_ipl_fcp_bootprog_attr.attr,
 463         &sys_ipl_fcp_br_lba_attr.attr,
 464         NULL,
 465 };
 466
 467 static struct attribute_group ipl_fcp_attr_group = {
 468         .attrs = ipl_fcp_attrs,
 469 };
 470
 471 /* CCW ipl device attributes */
 472
 473 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
 474                                      struct kobj_attribute *attr, char *page)
 475 {
 476         char loadparm[LOADPARM_LEN + 1] = {};
 477
 478         if (!sclp_ipl_info.is_valid)
 479                 return sprintf(page, "#unknown#\n");
 480         memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
 481         EBCASC(loadparm, LOADPARM_LEN);
 482         strim(loadparm);
 483         return sprintf(page, "%s\n", loadparm);
 484 }
 485
 486 static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
 487         __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
 488
 489 static struct attribute *ipl_ccw_attrs_vm[] = {
 490         &sys_ipl_type_attr.attr,
 491         &sys_ipl_device_attr.attr,
 492         &sys_ipl_ccw_loadparm_attr.attr,
 493         &sys_ipl_vm_parm_attr.attr,
 494         NULL,
 495 };
 496
 497 static struct attribute *ipl_ccw_attrs_lpar[] = {
 498         &sys_ipl_type_attr.attr,
 499         &sys_ipl_device_attr.attr,
 500         &sys_ipl_ccw_loadparm_attr.attr,
 501         NULL,
 502 };
 503
 504 static struct attribute_group ipl_ccw_attr_group_vm = {
 505         .attrs = ipl_ccw_attrs_vm,
 506 };
 507
 508 static struct attribute_group ipl_ccw_attr_group_lpar = {
 509         .attrs = ipl_ccw_attrs_lpar
 510 };
 511
 512 /* NSS ipl device attributes */
 513
 514 DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
 515
 516 static struct attribute *ipl_nss_attrs[] = {
 517         &sys_ipl_type_attr.attr,
 518         &sys_ipl_nss_name_attr.attr,
 519         &sys_ipl_ccw_loadparm_attr.attr,
 520         &sys_ipl_vm_parm_attr.attr,
 521         NULL,
 522 };
 523
 524 static struct attribute_group ipl_nss_attr_group = {
 525         .attrs = ipl_nss_attrs,
 526 };
 527
 528 /* UNKNOWN ipl device attributes */
 529
 530 static struct attribute *ipl_unknown_attrs[] = {
 531         &sys_ipl_type_attr.attr,
 532         NULL,
 533 };
 534
 535 static struct attribute_group ipl_unknown_attr_group = {
 536         .attrs = ipl_unknown_attrs,
 537 };
 538
 539 static struct kset *ipl_kset;
 540
 541 static int __init ipl_register_fcp_files(void)
 542 {
 543         int rc;
 544
 545         rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
 546         if (rc)
 547                 goto out;
 548         rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
 549         if (rc)
 550                 goto out_ipl_parm;
 551         rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_scp_data_attr);
 552         if (!rc)
 553                 goto out;
 554
 555         sysfs_remove_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
 556
 557 out_ipl_parm:
 558         sysfs_remove_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
 559 out:
 560         return rc;
 561 }
 562
 563 static void __ipl_run(void *unused)
 564 {
 565         diag308(DIAG308_IPL, NULL);
 566         if (MACHINE_IS_VM)
 567                 __cpcmd("IPL", NULL, 0, NULL);
 568         else if (ipl_info.type == IPL_TYPE_CCW)
 569                 reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
 570 }
 571
 572 static void ipl_run(struct shutdown_trigger *trigger)
 573 {
 574         smp_switch_to_ipl_cpu(__ipl_run, NULL);
 575 }
 576
 577 static int __init ipl_init(void)
 578 {
 579         int rc;
 580
 581         ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
 582         if (!ipl_kset) {
 583                 rc = -ENOMEM;
 584                 goto out;
 585         }
 586         switch (ipl_info.type) {
 587         case IPL_TYPE_CCW:
 588                 if (MACHINE_IS_VM)
 589                         rc = sysfs_create_group(&ipl_kset->kobj,
 590                                                 &ipl_ccw_attr_group_vm);
 591                 else
 592                         rc = sysfs_create_group(&ipl_kset->kobj,
 593                                                 &ipl_ccw_attr_group_lpar);
 594                 break;
 595         case IPL_TYPE_FCP:
 596         case IPL_TYPE_FCP_DUMP:
 597                 rc = ipl_register_fcp_files();
 598                 break;
 599         case IPL_TYPE_NSS:
 600                 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group);
 601                 break;
 602         default:
 603                 rc = sysfs_create_group(&ipl_kset->kobj,
 604                                         &ipl_unknown_attr_group);
 605                 break;
 606         }
 607 out:
 608         if (rc)
 609                 panic("ipl_init failed: rc = %i\n", rc);
 610
 611         return 0;
 612 }
 613
 614 static struct shutdown_action __refdata ipl_action = {
 615         .name   = SHUTDOWN_ACTION_IPL_STR,
 616         .fn     = ipl_run,
 617         .init   = ipl_init,
 618 };
 619
 620 /*
 621  * reipl shutdown action: Reboot Linux on shutdown.
 622  */
 623
 624 /* VM IPL PARM attributes */
 625 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
 626                                           char *page)
 627 {
 628         char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
 629
 630         reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
 631         return sprintf(page, "%s\n", vmparm);
 632 }
 633
 634 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
 635                                           size_t vmparm_max,
 636                                           const char *buf, size_t len)
 637 {
 638         int i, ip_len;
 639
 640         /* ignore trailing newline */
 641         ip_len = len;
 642         if ((len > 0) && (buf[len - 1] == '\n'))
 643                 ip_len--;
 644
 645         if (ip_len > vmparm_max)
 646                 return -EINVAL;
 647
 648         /* parm is used to store kernel options, check for common chars */
 649         for (i = 0; i < ip_len; i++)
 650                 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
 651                         return -EINVAL;
 652
 653         memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
 654         ipb->ipl_info.ccw.vm_parm_len = ip_len;
 655         if (ip_len > 0) {
 656                 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
 657                 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
 658                 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
 659         } else {
 660                 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
 661         }
 662
 663         return len;
 664 }
 665
 666 /* NSS wrapper */
 667 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
 668                                      struct kobj_attribute *attr, char *page)
 669 {
 670         return reipl_generic_vmparm_show(reipl_block_nss, page);
 671 }
 672
 673 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
 674                                       struct kobj_attribute *attr,
 675                                       const char *buf, size_t len)
 676 {
 677         return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
 678 }
 679
 680 /* CCW wrapper */
 681 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
 682                                      struct kobj_attribute *attr, char *page)
 683 {
 684         return reipl_generic_vmparm_show(reipl_block_ccw, page);
 685 }
 686
 687 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
 688                                       struct kobj_attribute *attr,
 689                                       const char *buf, size_t len)
 690 {
 691         return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
 692 }
 693
 694 static struct kobj_attribute sys_reipl_nss_vmparm_attr =
 695         __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
 696                                         reipl_nss_vmparm_store);
 697 static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
 698         __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
 699                                         reipl_ccw_vmparm_store);
 700
 701 /* FCP reipl device attributes */
 702
 703 static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
 704                                       struct bin_attribute *attr,
 705                                       char *buf, loff_t off, size_t count)
 706 {
 707         size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
 708         void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
 709
 710         return memory_read_from_buffer(buf, count, &off, scp_data, size);
 711 }
 712
 713 static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
 714                                        struct bin_attribute *attr,
 715                                        char *buf, loff_t off, size_t count)
 716 {
 717         size_t padding;
 718         size_t scpdata_len;
 719
 720         if (off < 0)
 721                 return -EINVAL;
 722
 723         if (off >= DIAG308_SCPDATA_SIZE)
 724                 return -ENOSPC;
 725
 726         if (count > DIAG308_SCPDATA_SIZE - off)
 727                 count = DIAG308_SCPDATA_SIZE - off;
 728
 729         memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf + off, count);
 730         scpdata_len = off + count;
 731
 732         if (scpdata_len % 8) {
 733                 padding = 8 - (scpdata_len % 8);
 734                 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
 735                        0, padding);
 736                 scpdata_len += padding;
 737         }
 738
 739         reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
 740         reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
 741         reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
 742
 743         return count;
 744 }
 745
 746 static struct bin_attribute sys_reipl_fcp_scp_data_attr = {
 747         .attr = {
 748                 .name = "scp_data",
 749                 .mode = S_IRUGO | S_IWUSR,
 750         },
 751         .size = PAGE_SIZE,
 752         .read = reipl_fcp_scpdata_read,
 753         .write = reipl_fcp_scpdata_write,
 754 };
 755
 756 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n",
 757                    reipl_block_fcp->ipl_info.fcp.wwpn);
 758 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n",
 759                    reipl_block_fcp->ipl_info.fcp.lun);
 760 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
 761                    reipl_block_fcp->ipl_info.fcp.bootprog);
 762 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
 763                    reipl_block_fcp->ipl_info.fcp.br_lba);
 764 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
 765                    reipl_block_fcp->ipl_info.fcp.devno);
 766
 767 static struct attribute *reipl_fcp_attrs[] = {
 768         &sys_reipl_fcp_device_attr.attr,
 769         &sys_reipl_fcp_wwpn_attr.attr,
 770         &sys_reipl_fcp_lun_attr.attr,
 771         &sys_reipl_fcp_bootprog_attr.attr,
 772         &sys_reipl_fcp_br_lba_attr.attr,
 773         NULL,
 774 };
 775
 776 static struct attribute_group reipl_fcp_attr_group = {
 777         .attrs = reipl_fcp_attrs,
 778 };
 779
 780 /* CCW reipl device attributes */
 781
 782 DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
 783         reipl_block_ccw->ipl_info.ccw.devno);
 784
 785 static void reipl_get_ascii_loadparm(char *loadparm,
 786                                      struct ipl_parameter_block *ibp)
 787 {
 788         memcpy(loadparm, ibp->ipl_info.ccw.load_parm, LOADPARM_LEN);
 789         EBCASC(loadparm, LOADPARM_LEN);
 790         loadparm[LOADPARM_LEN] = 0;
 791         strim(loadparm);
 792 }
 793
 794 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
 795                                            char *page)
 796 {
 797         char buf[LOADPARM_LEN + 1];
 798
 799         reipl_get_ascii_loadparm(buf, ipb);
 800         return sprintf(page, "%s\n", buf);
 801 }
 802
 803 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
 804                                             const char *buf, size_t len)
 805 {
 806         int i, lp_len;
 807
 808         /* ignore trailing newline */
 809         lp_len = len;
 810         if ((len > 0) && (buf[len - 1] == '\n'))
 811                 lp_len--;
 812         /* loadparm can have max 8 characters and must not start with a blank */
 813         if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
 814                 return -EINVAL;
 815         /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
 816         for (i = 0; i < lp_len; i++) {
 817                 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
 818                     (buf[i] == '.'))
 819                         continue;
 820                 return -EINVAL;
 821         }
 822         /* initialize loadparm with blanks */
 823         memset(ipb->ipl_info.ccw.load_parm, ' ', LOADPARM_LEN);
 824         /* copy and convert to ebcdic */
 825         memcpy(ipb->ipl_info.ccw.load_parm, buf, lp_len);
 826         ASCEBC(ipb->ipl_info.ccw.load_parm, LOADPARM_LEN);
 827         return len;
 828 }
 829
 830 /* NSS wrapper */
 831 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
 832                                        struct kobj_attribute *attr, char *page)
 833 {
 834         return reipl_generic_loadparm_show(reipl_block_nss, page);
 835 }
 836
 837 static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
 838                                         struct kobj_attribute *attr,
 839                                         const char *buf, size_t len)
 840 {
 841         return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
 842 }
 843
 844 /* CCW wrapper */
 845 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
 846                                        struct kobj_attribute *attr, char *page)
 847 {
 848         return reipl_generic_loadparm_show(reipl_block_ccw, page);
 849 }
 850
 851 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
 852                                         struct kobj_attribute *attr,
 853                                         const char *buf, size_t len)
 854 {
 855         return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
 856 }
 857
 858 static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
 859         __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
 860                                             reipl_ccw_loadparm_store);
 861
 862 static struct attribute *reipl_ccw_attrs_vm[] = {
 863         &sys_reipl_ccw_device_attr.attr,
 864         &sys_reipl_ccw_loadparm_attr.attr,
 865         &sys_reipl_ccw_vmparm_attr.attr,
 866         NULL,
 867 };
 868
 869 static struct attribute *reipl_ccw_attrs_lpar[] = {
 870         &sys_reipl_ccw_device_attr.attr,
 871         &sys_reipl_ccw_loadparm_attr.attr,
 872         NULL,
 873 };
 874
 875 static struct attribute_group reipl_ccw_attr_group_vm = {
 876         .name  = IPL_CCW_STR,
 877         .attrs = reipl_ccw_attrs_vm,
 878 };
 879
 880 static struct attribute_group reipl_ccw_attr_group_lpar = {
 881         .name  = IPL_CCW_STR,
 882         .attrs = reipl_ccw_attrs_lpar,
 883 };
 884
 885
 886 /* NSS reipl device attributes */
 887 static void reipl_get_ascii_nss_name(char *dst,
 888                                      struct ipl_parameter_block *ipb)
 889 {
 890         memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
 891         EBCASC(dst, NSS_NAME_SIZE);
 892         dst[NSS_NAME_SIZE] = 0;
 893 }
 894
 895 static ssize_t reipl_nss_name_show(struct kobject *kobj,
 896                                    struct kobj_attribute *attr, char *page)
 897 {
 898         char nss_name[NSS_NAME_SIZE + 1] = {};
 899
 900         reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
 901         return sprintf(page, "%s\n", nss_name);
 902 }
 903
 904 static ssize_t reipl_nss_name_store(struct kobject *kobj,
 905                                     struct kobj_attribute *attr,
 906                                     const char *buf, size_t len)
 907 {
 908         int nss_len;
 909
 910         /* ignore trailing newline */
 911         nss_len = len;
 912         if ((len > 0) && (buf[len - 1] == '\n'))
 913                 nss_len--;
 914
 915         if (nss_len > NSS_NAME_SIZE)
 916                 return -EINVAL;
 917
 918         memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
 919         if (nss_len > 0) {
 920                 reipl_block_nss->ipl_info.ccw.vm_flags |=
 921                         DIAG308_VM_FLAGS_NSS_VALID;
 922                 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
 923                 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
 924                 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
 925         } else {
 926                 reipl_block_nss->ipl_info.ccw.vm_flags &=
 927                         ~DIAG308_VM_FLAGS_NSS_VALID;
 928         }
 929
 930         return len;
 931 }
 932
 933 static struct kobj_attribute sys_reipl_nss_name_attr =
 934         __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
 935                                         reipl_nss_name_store);
 936
 937 static struct kobj_attribute sys_reipl_nss_loadparm_attr =
 938         __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
 939                                             reipl_nss_loadparm_store);
 940
 941 static struct attribute *reipl_nss_attrs[] = {
 942         &sys_reipl_nss_name_attr.attr,
 943         &sys_reipl_nss_loadparm_attr.attr,
 944         &sys_reipl_nss_vmparm_attr.attr,
 945         NULL,
 946 };
 947
 948 static struct attribute_group reipl_nss_attr_group = {
 949         .name  = IPL_NSS_STR,
 950         .attrs = reipl_nss_attrs,
 951 };
 952
 953 /* reipl type */
 954
 955 static int reipl_set_type(enum ipl_type type)
 956 {
 957         if (!(reipl_capabilities & type))
 958                 return -EINVAL;
 959
 960         switch(type) {
 961         case IPL_TYPE_CCW:
 962                 if (diag308_set_works)
 963                         reipl_method = REIPL_METHOD_CCW_DIAG;
 964                 else if (MACHINE_IS_VM)
 965                         reipl_method = REIPL_METHOD_CCW_VM;
 966                 else
 967                         reipl_method = REIPL_METHOD_CCW_CIO;
 968                 reipl_block_actual = reipl_block_ccw;
 969                 break;
 970         case IPL_TYPE_FCP:
 971                 if (diag308_set_works)
 972                         reipl_method = REIPL_METHOD_FCP_RW_DIAG;
 973                 else if (MACHINE_IS_VM)
 974                         reipl_method = REIPL_METHOD_FCP_RO_VM;
 975                 else
 976                         reipl_method = REIPL_METHOD_FCP_RO_DIAG;
 977                 reipl_block_actual = reipl_block_fcp;
 978                 break;
 979         case IPL_TYPE_FCP_DUMP:
 980                 reipl_method = REIPL_METHOD_FCP_DUMP;
 981                 break;
 982         case IPL_TYPE_NSS:
 983                 if (diag308_set_works)
 984                         reipl_method = REIPL_METHOD_NSS_DIAG;
 985                 else
 986                         reipl_method = REIPL_METHOD_NSS;
 987                 reipl_block_actual = reipl_block_nss;
 988                 break;
 989         case IPL_TYPE_UNKNOWN:
 990                 reipl_method = REIPL_METHOD_DEFAULT;
 991                 break;
 992         default:
 993                 BUG();
 994         }
 995         reipl_type = type;
 996         return 0;
 997 }
 998
 999 static ssize_t reipl_type_show(struct kobject *kobj,
1000                                struct kobj_attribute *attr, char *page)
1001 {
1002         return sprintf(page, "%s\n", ipl_type_str(reipl_type));
1003 }
1004
1005 static ssize_t reipl_type_store(struct kobject *kobj,
1006                                 struct kobj_attribute *attr,
1007                                 const char *buf, size_t len)
1008 {
1009         int rc = -EINVAL;
1010
1011         if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1012                 rc = reipl_set_type(IPL_TYPE_CCW);
1013         else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1014                 rc = reipl_set_type(IPL_TYPE_FCP);
1015         else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1016                 rc = reipl_set_type(IPL_TYPE_NSS);
1017         return (rc != 0) ? rc : len;
1018 }
1019
1020 static struct kobj_attribute reipl_type_attr =
1021         __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
1022
1023 static struct kset *reipl_kset;
1024 static struct kset *reipl_fcp_kset;
1025
1026 static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
1027                            const enum ipl_method m)
1028 {
1029         char loadparm[LOADPARM_LEN + 1] = {};
1030         char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
1031         char nss_name[NSS_NAME_SIZE + 1] = {};
1032         size_t pos = 0;
1033
1034         reipl_get_ascii_loadparm(loadparm, ipb);
1035         reipl_get_ascii_nss_name(nss_name, ipb);
1036         reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
1037
1038         switch (m) {
1039         case REIPL_METHOD_CCW_VM:
1040                 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
1041                 break;
1042         case REIPL_METHOD_NSS:
1043                 pos = sprintf(dst, "IPL %s", nss_name);
1044                 break;
1045         default:
1046                 break;
1047         }
1048         if (strlen(loadparm) > 0)
1049                 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
1050         if (strlen(vmparm) > 0)
1051                 sprintf(dst + pos, " PARM %s", vmparm);
1052 }
1053
1054 static void __reipl_run(void *unused)
1055 {
1056         struct ccw_dev_id devid;
1057         static char buf[128];
1058
1059         switch (reipl_method) {
1060         case REIPL_METHOD_CCW_CIO:
1061                 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
1062                 devid.ssid  = 0;
1063                 reipl_ccw_dev(&devid);
1064                 break;
1065         case REIPL_METHOD_CCW_VM:
1066                 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
1067                 __cpcmd(buf, NULL, 0, NULL);
1068                 break;
1069         case REIPL_METHOD_CCW_DIAG:
1070                 diag308(DIAG308_SET, reipl_block_ccw);
1071                 diag308(DIAG308_IPL, NULL);
1072                 break;
1073         case REIPL_METHOD_FCP_RW_DIAG:
1074                 diag308(DIAG308_SET, reipl_block_fcp);
1075                 diag308(DIAG308_IPL, NULL);
1076                 break;
1077         case REIPL_METHOD_FCP_RO_DIAG:
1078                 diag308(DIAG308_IPL, NULL);
1079                 break;
1080         case REIPL_METHOD_FCP_RO_VM:
1081                 __cpcmd("IPL", NULL, 0, NULL);
1082                 break;
1083         case REIPL_METHOD_NSS_DIAG:
1084                 diag308(DIAG308_SET, reipl_block_nss);
1085                 diag308(DIAG308_IPL, NULL);
1086                 break;
1087         case REIPL_METHOD_NSS:
1088                 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
1089                 __cpcmd(buf, NULL, 0, NULL);
1090                 break;
1091         case REIPL_METHOD_DEFAULT:
1092                 if (MACHINE_IS_VM)
1093                         __cpcmd("IPL", NULL, 0, NULL);
1094                 diag308(DIAG308_IPL, NULL);
1095                 break;
1096         case REIPL_METHOD_FCP_DUMP:
1097                 break;
1098         }
1099         disabled_wait((unsigned long) __builtin_return_address(0));
1100 }
1101
1102 static void reipl_run(struct shutdown_trigger *trigger)
1103 {
1104         smp_switch_to_ipl_cpu(__reipl_run, NULL);
1105 }
1106
1107 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
1108 {
1109         ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
1110         ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1111         ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1112         ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1113 }
1114
1115 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1116 {
1117         /* LOADPARM */
1118         /* check if read scp info worked and set loadparm */
1119         if (sclp_ipl_info.is_valid)
1120                 memcpy(ipb->ipl_info.ccw.load_parm,
1121                                 &sclp_ipl_info.loadparm, LOADPARM_LEN);
1122         else
1123                 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1124                 memset(ipb->ipl_info.ccw.load_parm, 0x40, LOADPARM_LEN);
1125         ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
1126
1127         /* VM PARM */
1128         if (MACHINE_IS_VM && diag308_set_works &&
1129             (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1130
1131                 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1132                 ipb->ipl_info.ccw.vm_parm_len =
1133                                         ipl_block.ipl_info.ccw.vm_parm_len;
1134                 memcpy(ipb->ipl_info.ccw.vm_parm,
1135                        ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1136         }
1137 }
1138
1139 static int __init reipl_nss_init(void)
1140 {
1141         int rc;
1142
1143         if (!MACHINE_IS_VM)
1144                 return 0;
1145
1146         reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1147         if (!reipl_block_nss)
1148                 return -ENOMEM;
1149
1150         if (!diag308_set_works)
1151                 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO;
1152
1153         rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1154         if (rc)
1155                 return rc;
1156
1157         reipl_block_ccw_init(reipl_block_nss);
1158         if (ipl_info.type == IPL_TYPE_NSS) {
1159                 memset(reipl_block_nss->ipl_info.ccw.nss_name,
1160                         ' ', NSS_NAME_SIZE);
1161                 memcpy(reipl_block_nss->ipl_info.ccw.nss_name,
1162                         kernel_nss_name, strlen(kernel_nss_name));
1163                 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
1164                 reipl_block_nss->ipl_info.ccw.vm_flags |=
1165                         DIAG308_VM_FLAGS_NSS_VALID;
1166
1167                 reipl_block_ccw_fill_parms(reipl_block_nss);
1168         }
1169
1170         reipl_capabilities |= IPL_TYPE_NSS;
1171         return 0;
1172 }
1173
1174 static int __init reipl_ccw_init(void)
1175 {
1176         int rc;
1177
1178         reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1179         if (!reipl_block_ccw)
1180                 return -ENOMEM;
1181
1182         if (MACHINE_IS_VM) {
1183                 if (!diag308_set_works)
1184                         sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
1185                 rc = sysfs_create_group(&reipl_kset->kobj,
1186                                         &reipl_ccw_attr_group_vm);
1187         } else {
1188                 if(!diag308_set_works)
1189                         sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
1190                 rc = sysfs_create_group(&reipl_kset->kobj,
1191                                         &reipl_ccw_attr_group_lpar);
1192         }
1193         if (rc)
1194                 return rc;
1195
1196         reipl_block_ccw_init(reipl_block_ccw);
1197         if (ipl_info.type == IPL_TYPE_CCW) {
1198                 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
1199                 reipl_block_ccw_fill_parms(reipl_block_ccw);
1200         }
1201
1202         reipl_capabilities |= IPL_TYPE_CCW;
1203         return 0;
1204 }
1205
1206 static int __init reipl_fcp_init(void)
1207 {
1208         int rc;
1209
1210         if (!diag308_set_works) {
1211                 if (ipl_info.type == IPL_TYPE_FCP) {
1212                         make_attrs_ro(reipl_fcp_attrs);
1213                         sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO;
1214                 } else
1215                         return 0;
1216         }
1217
1218         reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1219         if (!reipl_block_fcp)
1220                 return -ENOMEM;
1221
1222         /* sysfs: create fcp kset for mixing attr group and bin attrs */
1223         reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1224                                              &reipl_kset->kobj);
1225         if (!reipl_fcp_kset) {
1226                 free_page((unsigned long) reipl_block_fcp);
1227                 return -ENOMEM;
1228         }
1229
1230         rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1231         if (rc) {
1232                 kset_unregister(reipl_fcp_kset);
1233                 free_page((unsigned long) reipl_block_fcp);
1234                 return rc;
1235         }
1236
1237         rc = sysfs_create_bin_file(&reipl_fcp_kset->kobj,
1238                                    &sys_reipl_fcp_scp_data_attr);
1239         if (rc) {
1240                 sysfs_remove_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1241                 kset_unregister(reipl_fcp_kset);
1242                 free_page((unsigned long) reipl_block_fcp);
1243                 return rc;
1244         }
1245
1246         if (ipl_info.type == IPL_TYPE_FCP)
1247                 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
1248         else {
1249                 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1250                 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1251                 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1252                 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1253                 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1254         }
1255         reipl_capabilities |= IPL_TYPE_FCP;
1256         return 0;
1257 }
1258
1259 static int __init reipl_init(void)
1260 {
1261         int rc;
1262
1263         reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1264         if (!reipl_kset)
1265                 return -ENOMEM;
1266         rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1267         if (rc) {
1268                 kset_unregister(reipl_kset);
1269                 return rc;
1270         }
1271         rc = reipl_ccw_init();
1272         if (rc)
1273                 return rc;
1274         rc = reipl_fcp_init();
1275         if (rc)
1276                 return rc;
1277         rc = reipl_nss_init();
1278         if (rc)
1279                 return rc;
1280         rc = reipl_set_type(ipl_info.type);
1281         if (rc)
1282                 return rc;
1283         return 0;
1284 }
1285
1286 static struct shutdown_action __refdata reipl_action = {
1287         .name   = SHUTDOWN_ACTION_REIPL_STR,
1288         .fn     = reipl_run,
1289         .init   = reipl_init,
1290 };
1291
1292 /*
1293  * dump shutdown action: Dump Linux on shutdown.
1294  */
1295
1296 /* FCP dump device attributes */
1297
1298 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n",
1299                    dump_block_fcp->ipl_info.fcp.wwpn);
1300 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n",
1301                    dump_block_fcp->ipl_info.fcp.lun);
1302 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1303                    dump_block_fcp->ipl_info.fcp.bootprog);
1304 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1305                    dump_block_fcp->ipl_info.fcp.br_lba);
1306 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1307                    dump_block_fcp->ipl_info.fcp.devno);
1308
1309 static struct attribute *dump_fcp_attrs[] = {
1310         &sys_dump_fcp_device_attr.attr,
1311         &sys_dump_fcp_wwpn_attr.attr,
1312         &sys_dump_fcp_lun_attr.attr,
1313         &sys_dump_fcp_bootprog_attr.attr,
1314         &sys_dump_fcp_br_lba_attr.attr,
1315         NULL,
1316 };
1317
1318 static struct attribute_group dump_fcp_attr_group = {
1319         .name  = IPL_FCP_STR,
1320         .attrs = dump_fcp_attrs,
1321 };
1322
1323 /* CCW dump device attributes */
1324
1325 DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
1326                    dump_block_ccw->ipl_info.ccw.devno);
1327
1328 static struct attribute *dump_ccw_attrs[] = {
1329         &sys_dump_ccw_device_attr.attr,
1330         NULL,
1331 };
1332
1333 static struct attribute_group dump_ccw_attr_group = {
1334         .name  = IPL_CCW_STR,
1335         .attrs = dump_ccw_attrs,
1336 };
1337
1338 /* dump type */
1339
1340 static int dump_set_type(enum dump_type type)
1341 {
1342         if (!(dump_capabilities & type))
1343                 return -EINVAL;
1344         switch (type) {
1345         case DUMP_TYPE_CCW:
1346                 if (diag308_set_works)
1347                         dump_method = DUMP_METHOD_CCW_DIAG;
1348                 else if (MACHINE_IS_VM)
1349                         dump_method = DUMP_METHOD_CCW_VM;
1350                 else
1351                         dump_method = DUMP_METHOD_CCW_CIO;
1352                 break;
1353         case DUMP_TYPE_FCP:
1354                 dump_method = DUMP_METHOD_FCP_DIAG;
1355                 break;
1356         default:
1357                 dump_method = DUMP_METHOD_NONE;
1358         }
1359         dump_type = type;
1360         return 0;
1361 }
1362
1363 static ssize_t dump_type_show(struct kobject *kobj,
1364                               struct kobj_attribute *attr, char *page)
1365 {
1366         return sprintf(page, "%s\n", dump_type_str(dump_type));
1367 }
1368
1369 static ssize_t dump_type_store(struct kobject *kobj,
1370                                struct kobj_attribute *attr,
1371                                const char *buf, size_t len)
1372 {
1373         int rc = -EINVAL;
1374
1375         if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1376                 rc = dump_set_type(DUMP_TYPE_NONE);
1377         else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1378                 rc = dump_set_type(DUMP_TYPE_CCW);
1379         else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1380                 rc = dump_set_type(DUMP_TYPE_FCP);
1381         return (rc != 0) ? rc : len;
1382 }
1383
1384 static struct kobj_attribute dump_type_attr =
1385         __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1386
1387 static struct kset *dump_kset;
1388
1389 static void __dump_run(void *unused)
1390 {
1391         struct ccw_dev_id devid;
1392         static char buf[100];
1393
1394         switch (dump_method) {
1395         case DUMP_METHOD_CCW_CIO:
1396                 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
1397                 devid.ssid  = 0;
1398                 reipl_ccw_dev(&devid);
1399                 break;
1400         case DUMP_METHOD_CCW_VM:
1401                 sprintf(buf, "STORE STATUS");
1402                 __cpcmd(buf, NULL, 0, NULL);
1403                 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
1404                 __cpcmd(buf, NULL, 0, NULL);
1405                 break;
1406         case DUMP_METHOD_CCW_DIAG:
1407                 diag308(DIAG308_SET, dump_block_ccw);
1408                 diag308(DIAG308_DUMP, NULL);
1409                 break;
1410         case DUMP_METHOD_FCP_DIAG:
1411                 diag308(DIAG308_SET, dump_block_fcp);
1412                 diag308(DIAG308_DUMP, NULL);
1413                 break;
1414         default:
1415                 break;
1416         }
1417 }
1418
1419 static void dump_run(struct shutdown_trigger *trigger)
1420 {
1421         if (dump_method == DUMP_METHOD_NONE)
1422                 return;
1423         smp_send_stop();
1424         smp_switch_to_ipl_cpu(__dump_run, NULL);
1425 }
1426
1427 static int __init dump_ccw_init(void)
1428 {
1429         int rc;
1430
1431         dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1432         if (!dump_block_ccw)
1433                 return -ENOMEM;
1434         rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1435         if (rc) {
1436                 free_page((unsigned long)dump_block_ccw);
1437                 return rc;
1438         }
1439         dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1440         dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1441         dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1442         dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1443         dump_capabilities |= DUMP_TYPE_CCW;
1444         return 0;
1445 }
1446
1447 static int __init dump_fcp_init(void)
1448 {
1449         int rc;
1450
1451         if (!sclp_ipl_info.has_dump)
1452                 return 0; /* LDIPL DUMP is not installed */
1453         if (!diag308_set_works)
1454                 return 0;
1455         dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1456         if (!dump_block_fcp)
1457                 return -ENOMEM;
1458         rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1459         if (rc) {
1460                 free_page((unsigned long)dump_block_fcp);
1461                 return rc;
1462         }
1463         dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1464         dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1465         dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1466         dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1467         dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1468         dump_capabilities |= DUMP_TYPE_FCP;
1469         return 0;
1470 }
1471
1472 static int __init dump_init(void)
1473 {
1474         int rc;
1475
1476         dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1477         if (!dump_kset)
1478                 return -ENOMEM;
1479         rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1480         if (rc) {
1481                 kset_unregister(dump_kset);
1482                 return rc;
1483         }
1484         rc = dump_ccw_init();
1485         if (rc)
1486                 return rc;
1487         rc = dump_fcp_init();
1488         if (rc)
1489                 return rc;
1490         dump_set_type(DUMP_TYPE_NONE);
1491         return 0;
1492 }
1493
1494 static struct shutdown_action __refdata dump_action = {
1495         .name   = SHUTDOWN_ACTION_DUMP_STR,
1496         .fn     = dump_run,
1497         .init   = dump_init,
1498 };
1499
1500 static void dump_reipl_run(struct shutdown_trigger *trigger)
1501 {
1502         preempt_disable();
1503         /*
1504          * Bypass dynamic address translation (DAT) when storing IPL parameter
1505          * information block address and checksum into the prefix area
1506          * (corresponding to absolute addresses 0-8191).
1507          * When enhanced DAT applies and the STE format control in one,
1508          * the absolute address is formed without prefixing. In this case a
1509          * normal store (stg/st) into the prefix area would no more match to
1510          * absolute addresses 0-8191.
1511          */
1512 #ifdef CONFIG_64BIT
1513         asm volatile("sturg %0,%1"
1514                 :: "a" ((unsigned long) reipl_block_actual),
1515                 "a" (&lowcore_ptr[smp_processor_id()]->ipib));
1516 #else
1517         asm volatile("stura %0,%1"
1518                 :: "a" ((unsigned long) reipl_block_actual),
1519                 "a" (&lowcore_ptr[smp_processor_id()]->ipib));
1520 #endif
1521         asm volatile("stura %0,%1"
1522                 :: "a" (csum_partial(reipl_block_actual,
1523                                      reipl_block_actual->hdr.len, 0)),
1524                 "a" (&lowcore_ptr[smp_processor_id()]->ipib_checksum));
1525         preempt_enable();
1526         dump_run(trigger);
1527 }
1528
1529 static int __init dump_reipl_init(void)
1530 {
1531         if (!diag308_set_works)
1532                 return -EOPNOTSUPP;
1533         else
1534                 return 0;
1535 }
1536
1537 static struct shutdown_action __refdata dump_reipl_action = {
1538         .name   = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1539         .fn     = dump_reipl_run,
1540         .init   = dump_reipl_init,
1541 };
1542
1543 /*
1544  * vmcmd shutdown action: Trigger vm command on shutdown.
1545  */
1546
1547 static char vmcmd_on_reboot[128];
1548 static char vmcmd_on_panic[128];
1549 static char vmcmd_on_halt[128];
1550 static char vmcmd_on_poff[128];
1551 static char vmcmd_on_restart[128];
1552
1553 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1554 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1555 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1556 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1557 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1558
1559 static struct attribute *vmcmd_attrs[] = {
1560         &sys_vmcmd_on_reboot_attr.attr,
1561         &sys_vmcmd_on_panic_attr.attr,
1562         &sys_vmcmd_on_halt_attr.attr,
1563         &sys_vmcmd_on_poff_attr.attr,
1564         &sys_vmcmd_on_restart_attr.attr,
1565         NULL,
1566 };
1567
1568 static struct attribute_group vmcmd_attr_group = {
1569         .attrs = vmcmd_attrs,
1570 };
1571
1572 static struct kset *vmcmd_kset;
1573
1574 static void vmcmd_run(struct shutdown_trigger *trigger)
1575 {
1576         char *cmd, *next_cmd;
1577
1578         if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1579                 cmd = vmcmd_on_reboot;
1580         else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1581                 cmd = vmcmd_on_panic;
1582         else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1583                 cmd = vmcmd_on_halt;
1584         else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1585                 cmd = vmcmd_on_poff;
1586         else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
1587                 cmd = vmcmd_on_restart;
1588         else
1589                 return;
1590
1591         if (strlen(cmd) == 0)
1592                 return;
1593         do {
1594                 next_cmd = strchr(cmd, '\n');
1595                 if (next_cmd) {
1596                         next_cmd[0] = 0;
1597                         next_cmd += 1;
1598                 }
1599                 __cpcmd(cmd, NULL, 0, NULL);
1600                 cmd = next_cmd;
1601         } while (cmd != NULL);
1602 }
1603
1604 static int vmcmd_init(void)
1605 {
1606         if (!MACHINE_IS_VM)
1607                 return -EOPNOTSUPP;
1608         vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1609         if (!vmcmd_kset)
1610                 return -ENOMEM;
1611         return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1612 }
1613
1614 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1615                                               vmcmd_run, vmcmd_init};
1616
1617 /*
1618  * stop shutdown action: Stop Linux on shutdown.
1619  */
1620
1621 static void stop_run(struct shutdown_trigger *trigger)
1622 {
1623         if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
1624             strcmp(trigger->name, ON_RESTART_STR) == 0)
1625                 disabled_wait((unsigned long) __builtin_return_address(0));
1626         while (sigp(smp_processor_id(), sigp_stop) == sigp_busy)
1627                 cpu_relax();
1628         for (;;);
1629 }
1630
1631 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1632                                              stop_run, NULL};
1633
1634 /* action list */
1635
1636 static struct shutdown_action *shutdown_actions_list[] = {
1637         &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1638         &vmcmd_action, &stop_action};
1639 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1640
1641 /*
1642  * Trigger section
1643  */
1644
1645 static struct kset *shutdown_actions_kset;
1646
1647 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1648                        size_t len)
1649 {
1650         int i;
1651
1652         for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1653                 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1654                         if (shutdown_actions_list[i]->init_rc) {
1655                                 return shutdown_actions_list[i]->init_rc;
1656                         } else {
1657                                 trigger->action = shutdown_actions_list[i];
1658                                 return len;
1659                         }
1660                 }
1661         }
1662         return -EINVAL;
1663 }
1664
1665 /* on reipl */
1666
1667 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1668                                                     &reipl_action};
1669
1670 static ssize_t on_reboot_show(struct kobject *kobj,
1671                               struct kobj_attribute *attr, char *page)
1672 {
1673         return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1674 }
1675
1676 static ssize_t on_reboot_store(struct kobject *kobj,
1677                                struct kobj_attribute *attr,
1678                                const char *buf, size_t len)
1679 {
1680         return set_trigger(buf, &on_reboot_trigger, len);
1681 }
1682
1683 static struct kobj_attribute on_reboot_attr =
1684         __ATTR(on_reboot, 0644, on_reboot_show, on_reboot_store);
1685
1686 static void do_machine_restart(char *__unused)
1687 {
1688         smp_send_stop();
1689         on_reboot_trigger.action->fn(&on_reboot_trigger);
1690         reipl_run(NULL);
1691 }
1692 void (*_machine_restart)(char *command) = do_machine_restart;
1693
1694 /* on panic */
1695
1696 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1697
1698 static ssize_t on_panic_show(struct kobject *kobj,
1699                              struct kobj_attribute *attr, char *page)
1700 {
1701         return sprintf(page, "%s\n", on_panic_trigger.action->name);
1702 }
1703
1704 static ssize_t on_panic_store(struct kobject *kobj,
1705                               struct kobj_attribute *attr,
1706                               const char *buf, size_t len)
1707 {
1708         return set_trigger(buf, &on_panic_trigger, len);
1709 }
1710
1711 static struct kobj_attribute on_panic_attr =
1712         __ATTR(on_panic, 0644, on_panic_show, on_panic_store);
1713
1714 static void do_panic(void)
1715 {
1716         on_panic_trigger.action->fn(&on_panic_trigger);
1717         stop_run(&on_panic_trigger);
1718 }
1719
1720 /* on restart */
1721
1722 static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
1723         &stop_action};
1724
1725 static ssize_t on_restart_show(struct kobject *kobj,
1726                                struct kobj_attribute *attr, char *page)
1727 {
1728         return sprintf(page, "%s\n", on_restart_trigger.action->name);
1729 }
1730
1731 static ssize_t on_restart_store(struct kobject *kobj,
1732                                 struct kobj_attribute *attr,
1733                                 const char *buf, size_t len)
1734 {
1735         return set_trigger(buf, &on_restart_trigger, len);
1736 }
1737
1738 static struct kobj_attribute on_restart_attr =
1739         __ATTR(on_restart, 0644, on_restart_show, on_restart_store);
1740
1741 void do_restart(void)
1742 {
1743         smp_restart_with_online_cpu();
1744         smp_send_stop();
1745 #ifdef CONFIG_CRASH_DUMP
1746         crash_kexec(NULL);
1747 #endif
1748         on_restart_trigger.action->fn(&on_restart_trigger);
1749         stop_run(&on_restart_trigger);
1750 }
1751
1752 /* on halt */
1753
1754 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1755
1756 static ssize_t on_halt_show(struct kobject *kobj,
1757                             struct kobj_attribute *attr, char *page)
1758 {
1759         return sprintf(page, "%s\n", on_halt_trigger.action->name);
1760 }
1761
1762 static ssize_t on_halt_store(struct kobject *kobj,
1763                              struct kobj_attribute *attr,
1764                              const char *buf, size_t len)
1765 {
1766         return set_trigger(buf, &on_halt_trigger, len);
1767 }
1768
1769 static struct kobj_attribute on_halt_attr =
1770         __ATTR(on_halt, 0644, on_halt_show, on_halt_store);
1771
1772
1773 static void do_machine_halt(void)
1774 {
1775         smp_send_stop();
1776         on_halt_trigger.action->fn(&on_halt_trigger);
1777         stop_run(&on_halt_trigger);
1778 }
1779 void (*_machine_halt)(void) = do_machine_halt;
1780
1781 /* on power off */
1782
1783 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1784
1785 static ssize_t on_poff_show(struct kobject *kobj,
1786                             struct kobj_attribute *attr, char *page)
1787 {
1788         return sprintf(page, "%s\n", on_poff_trigger.action->name);
1789 }
1790
1791 static ssize_t on_poff_store(struct kobject *kobj,
1792                              struct kobj_attribute *attr,
1793                              const char *buf, size_t len)
1794 {
1795         return set_trigger(buf, &on_poff_trigger, len);
1796 }
1797
1798 static struct kobj_attribute on_poff_attr =
1799         __ATTR(on_poff, 0644, on_poff_show, on_poff_store);
1800
1801
1802 static void do_machine_power_off(void)
1803 {
1804         smp_send_stop();
1805         on_poff_trigger.action->fn(&on_poff_trigger);
1806         stop_run(&on_poff_trigger);
1807 }
1808 void (*_machine_power_off)(void) = do_machine_power_off;
1809
1810 static void __init shutdown_triggers_init(void)
1811 {
1812         shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1813                                                     firmware_kobj);
1814         if (!shutdown_actions_kset)
1815                 goto fail;
1816         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1817                               &on_reboot_attr.attr))
1818                 goto fail;
1819         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1820                               &on_panic_attr.attr))
1821                 goto fail;
1822         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1823                               &on_halt_attr.attr))
1824                 goto fail;
1825         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1826                               &on_poff_attr.attr))
1827                 goto fail;
1828         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1829                               &on_restart_attr.attr))
1830                 goto fail;
1831         return;
1832 fail:
1833         panic("shutdown_triggers_init failed\n");
1834 }
1835
1836 static void __init shutdown_actions_init(void)
1837 {
1838         int i;
1839
1840         for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1841                 if (!shutdown_actions_list[i]->init)
1842                         continue;
1843                 shutdown_actions_list[i]->init_rc =
1844                         shutdown_actions_list[i]->init();
1845         }
1846 }
1847
1848 static int __init s390_ipl_init(void)
1849 {
1850         sclp_get_ipl_info(&sclp_ipl_info);
1851         shutdown_actions_init();
1852         shutdown_triggers_init();
1853         return 0;
1854 }
1855
1856 __initcall(s390_ipl_init);
1857
1858 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1859 {
1860         int sx, dx;
1861
1862         dx = 0;
1863         for (sx = 0; src[sx] != 0; sx++) {
1864                 if (src[sx] == '"')
1865                         continue;
1866                 dst[dx++] = src[sx];
1867                 if (dx >= n)
1868                         break;
1869         }
1870 }
1871
1872 static int __init vmcmd_on_reboot_setup(char *str)
1873 {
1874         if (!MACHINE_IS_VM)
1875                 return 1;
1876         strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1877         vmcmd_on_reboot[127] = 0;
1878         on_reboot_trigger.action = &vmcmd_action;
1879         return 1;
1880 }
1881 __setup("vmreboot=", vmcmd_on_reboot_setup);
1882
1883 static int __init vmcmd_on_panic_setup(char *str)
1884 {
1885         if (!MACHINE_IS_VM)
1886                 return 1;
1887         strncpy_skip_quote(vmcmd_on_panic, str, 127);
1888         vmcmd_on_panic[127] = 0;
1889         on_panic_trigger.action = &vmcmd_action;
1890         return 1;
1891 }
1892 __setup("vmpanic=", vmcmd_on_panic_setup);
1893
1894 static int __init vmcmd_on_halt_setup(char *str)
1895 {
1896         if (!MACHINE_IS_VM)
1897                 return 1;
1898         strncpy_skip_quote(vmcmd_on_halt, str, 127);
1899         vmcmd_on_halt[127] = 0;
1900         on_halt_trigger.action = &vmcmd_action;
1901         return 1;
1902 }
1903 __setup("vmhalt=", vmcmd_on_halt_setup);
1904
1905 static int __init vmcmd_on_poff_setup(char *str)
1906 {
1907         if (!MACHINE_IS_VM)
1908                 return 1;
1909         strncpy_skip_quote(vmcmd_on_poff, str, 127);
1910         vmcmd_on_poff[127] = 0;
1911         on_poff_trigger.action = &vmcmd_action;
1912         return 1;
1913 }
1914 __setup("vmpoff=", vmcmd_on_poff_setup);
1915
1916 static int on_panic_notify(struct notifier_block *self,
1917                            unsigned long event, void *data)
1918 {
1919         do_panic();
1920         return NOTIFY_OK;
1921 }
1922
1923 static struct notifier_block on_panic_nb = {
1924         .notifier_call = on_panic_notify,
1925         .priority = INT_MIN,
1926 };
1927
1928 void __init setup_ipl(void)
1929 {
1930         ipl_info.type = get_ipl_type();
1931         switch (ipl_info.type) {
1932         case IPL_TYPE_CCW:
1933                 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1934                 ipl_info.data.ccw.dev_id.ssid = 0;
1935                 break;
1936         case IPL_TYPE_FCP:
1937         case IPL_TYPE_FCP_DUMP:
1938                 ipl_info.data.fcp.dev_id.devno =
1939                         IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1940                 ipl_info.data.fcp.dev_id.ssid = 0;
1941                 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1942                 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1943                 break;
1944         case IPL_TYPE_NSS:
1945                 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1946                         sizeof(ipl_info.data.nss.name));
1947                 break;
1948         case IPL_TYPE_UNKNOWN:
1949                 /* We have no info to copy */
1950                 break;
1951         }
1952         atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1953 }
1954
1955 void __init ipl_update_parameters(void)
1956 {
1957         int rc;
1958
1959         rc = diag308(DIAG308_STORE, &ipl_block);
1960         if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
1961                 diag308_set_works = 1;
1962 }
1963
1964 void __init ipl_save_parameters(void)
1965 {
1966         struct cio_iplinfo iplinfo;
1967         void *src, *dst;
1968
1969         if (cio_get_iplinfo(&iplinfo))
1970                 return;
1971
1972         ipl_devno = iplinfo.devno;
1973         ipl_flags |= IPL_DEVNO_VALID;
1974         if (!iplinfo.is_qdio)
1975                 return;
1976         ipl_flags |= IPL_PARMBLOCK_VALID;
1977         src = (void *)(unsigned long)S390_lowcore.ipl_parmblock_ptr;
1978         dst = (void *)IPL_PARMBLOCK_ORIGIN;
1979         memmove(dst, src, PAGE_SIZE);
1980         S390_lowcore.ipl_parmblock_ptr = IPL_PARMBLOCK_ORIGIN;
1981 }
1982
1983 static LIST_HEAD(rcall);
1984 static DEFINE_MUTEX(rcall_mutex);
1985
1986 void register_reset_call(struct reset_call *reset)
1987 {
1988         mutex_lock(&rcall_mutex);
1989         list_add(&reset->list, &rcall);
1990         mutex_unlock(&rcall_mutex);
1991 }
1992 EXPORT_SYMBOL_GPL(register_reset_call);
1993
1994 void unregister_reset_call(struct reset_call *reset)
1995 {
1996         mutex_lock(&rcall_mutex);
1997         list_del(&reset->list);
1998         mutex_unlock(&rcall_mutex);
1999 }
2000 EXPORT_SYMBOL_GPL(unregister_reset_call);
2001
2002 static void do_reset_calls(void)
2003 {
2004         struct reset_call *reset;
2005
2006 #ifdef CONFIG_64BIT
2007         if (diag308_set_works) {
2008                 diag308_reset();
2009                 return;
2010         }
2011 #endif
2012         list_for_each_entry(reset, &rcall, list)
2013                 reset->fn();
2014 }
2015
2016 u32 dump_prefix_page;
2017
2018 void s390_reset_system(void (*func)(void *), void *data)
2019 {
2020         struct _lowcore *lc;
2021
2022         lc = (struct _lowcore *)(unsigned long) store_prefix();
2023
2024         /* Stack for interrupt/machine check handler */
2025         lc->panic_stack = S390_lowcore.panic_stack;
2026
2027         /* Save prefix page address for dump case */
2028         dump_prefix_page = (u32)(unsigned long) lc;
2029
2030         /* Disable prefixing */
2031         set_prefix(0);
2032
2033         /* Disable lowcore protection */
2034         __ctl_clear_bit(0,28);
2035
2036         /* Set new machine check handler */
2037         S390_lowcore.mcck_new_psw.mask = psw_kernel_bits | PSW_MASK_DAT;
2038         S390_lowcore.mcck_new_psw.addr =
2039                 PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;
2040
2041         /* Set new program check handler */
2042         S390_lowcore.program_new_psw.mask = psw_kernel_bits | PSW_MASK_DAT;
2043         S390_lowcore.program_new_psw.addr =
2044                 PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
2045
2046         /* Store status at absolute zero */
2047         store_status();
2048
2049         do_reset_calls();
2050         if (func)
2051                 func(data);
2052 }