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 <asm/ipl.h>
  20 #include <asm/smp.h>
  21 #include <asm/setup.h>
  22 #include <asm/cpcmd.h>
  23 #include <asm/cio.h>
  24 #include <asm/ebcdic.h>
  25 #include <asm/reset.h>
  26 #include <asm/sclp.h>
  27 #include <asm/sigp.h>
  28 #include <asm/checksum.h>
  29
  30 #define IPL_PARM_BLOCK_VERSION 0
  31
  32 #define IPL_UNKNOWN_STR         "unknown"
  33 #define IPL_CCW_STR             "ccw"
  34 #define IPL_FCP_STR             "fcp"
  35 #define IPL_FCP_DUMP_STR        "fcp_dump"
  36 #define IPL_NSS_STR             "nss"
  37
  38 #define DUMP_CCW_STR            "ccw"
  39 #define DUMP_FCP_STR            "fcp"
  40 #define DUMP_NONE_STR           "none"
  41
  42 /*
  43  * Four shutdown trigger types are supported:
  44  * - panic
  45  * - halt
  46  * - power off
  47  * - reipl
  48  * - restart
  49  */
  50 #define ON_PANIC_STR            "on_panic"
  51 #define ON_HALT_STR             "on_halt"
  52 #define ON_POFF_STR             "on_poff"
  53 #define ON_REIPL_STR            "on_reboot"
  54 #define ON_RESTART_STR          "on_restart"
  55
  56 struct shutdown_action;
  57 struct shutdown_trigger {
  58         char *name;
  59         struct shutdown_action *action;
  60 };
  61
  62 /*
  63  * The following shutdown action types are supported:
  64  */
  65 #define SHUTDOWN_ACTION_IPL_STR         "ipl"
  66 #define SHUTDOWN_ACTION_REIPL_STR       "reipl"
  67 #define SHUTDOWN_ACTION_DUMP_STR        "dump"
  68 #define SHUTDOWN_ACTION_VMCMD_STR       "vmcmd"
  69 #define SHUTDOWN_ACTION_STOP_STR        "stop"
  70 #define SHUTDOWN_ACTION_DUMP_REIPL_STR  "dump_reipl"
  71
  72 struct shutdown_action {
  73         char *name;
  74         void (*fn) (struct shutdown_trigger *trigger);
  75         int (*init) (void);
  76         int init_rc;
  77 };
  78
  79 static char *ipl_type_str(enum ipl_type type)
  80 {
  81         switch (type) {
  82         case IPL_TYPE_CCW:
  83                 return IPL_CCW_STR;
  84         case IPL_TYPE_FCP:
  85                 return IPL_FCP_STR;
  86         case IPL_TYPE_FCP_DUMP:
  87                 return IPL_FCP_DUMP_STR;
  88         case IPL_TYPE_NSS:
  89                 return IPL_NSS_STR;
  90         case IPL_TYPE_UNKNOWN:
  91         default:
  92                 return IPL_UNKNOWN_STR;
  93         }
  94 }
  95
  96 enum dump_type {
  97         DUMP_TYPE_NONE  = 1,
  98         DUMP_TYPE_CCW   = 2,
  99         DUMP_TYPE_FCP   = 4,
 100 };
 101
 102 static char *dump_type_str(enum dump_type type)
 103 {
 104         switch (type) {
 105         case DUMP_TYPE_NONE:
 106                 return DUMP_NONE_STR;
 107         case DUMP_TYPE_CCW:
 108                 return DUMP_CCW_STR;
 109         case DUMP_TYPE_FCP:
 110                 return DUMP_FCP_STR;
 111         default:
 112                 return NULL;
 113         }
 114 }
 115
 116 /*
 117  * Must be in data section since the bss section
 118  * is not cleared when these are accessed.
 119  */
 120 static u16 ipl_devno __attribute__((__section__(".data"))) = 0;
 121 u32 ipl_flags __attribute__((__section__(".data"))) = 0;
 122
 123 enum ipl_method {
 124         REIPL_METHOD_CCW_CIO,
 125         REIPL_METHOD_CCW_DIAG,
 126         REIPL_METHOD_CCW_VM,
 127         REIPL_METHOD_FCP_RO_DIAG,
 128         REIPL_METHOD_FCP_RW_DIAG,
 129         REIPL_METHOD_FCP_RO_VM,
 130         REIPL_METHOD_FCP_DUMP,
 131         REIPL_METHOD_NSS,
 132         REIPL_METHOD_NSS_DIAG,
 133         REIPL_METHOD_DEFAULT,
 134 };
 135
 136 enum dump_method {
 137         DUMP_METHOD_NONE,
 138         DUMP_METHOD_CCW_CIO,
 139         DUMP_METHOD_CCW_DIAG,
 140         DUMP_METHOD_CCW_VM,
 141         DUMP_METHOD_FCP_DIAG,
 142 };
 143
 144 static int diag308_set_works = 0;
 145
 146 static struct ipl_parameter_block ipl_block;
 147
 148 static int reipl_capabilities = IPL_TYPE_UNKNOWN;
 149
 150 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
 151 static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
 152 static struct ipl_parameter_block *reipl_block_fcp;
 153 static struct ipl_parameter_block *reipl_block_ccw;
 154 static struct ipl_parameter_block *reipl_block_nss;
 155 static struct ipl_parameter_block *reipl_block_actual;
 156
 157 static int dump_capabilities = DUMP_TYPE_NONE;
 158 static enum dump_type dump_type = DUMP_TYPE_NONE;
 159 static enum dump_method dump_method = DUMP_METHOD_NONE;
 160 static struct ipl_parameter_block *dump_block_fcp;
 161 static struct ipl_parameter_block *dump_block_ccw;
 162
 163 static struct sclp_ipl_info sclp_ipl_info;
 164
 165 int diag308(unsigned long subcode, void *addr)
 166 {
 167         register unsigned long _addr asm("0") = (unsigned long) addr;
 168         register unsigned long _rc asm("1") = 0;
 169
 170         asm volatile(
 171                 "       diag    %0,%2,0x308\n"
 172                 "0:\n"
 173                 EX_TABLE(0b,0b)
 174                 : "+d" (_addr), "+d" (_rc)
 175                 : "d" (subcode) : "cc", "memory");
 176         return _rc;
 177 }
 178 EXPORT_SYMBOL_GPL(diag308);
 179
 180 /* SYSFS */
 181
 182 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value)             \
 183 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,     \
 184                 struct kobj_attribute *attr,                            \
 185                 char *page)                                             \
 186 {                                                                       \
 187         return sprintf(page, _format, _value);                          \
 188 }                                                                       \
 189 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 190         __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL);
 191
 192 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)   \
 193 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,     \
 194                 struct kobj_attribute *attr,                            \
 195                 char *page)                                             \
 196 {                                                                       \
 197         return sprintf(page, _fmt_out,                                  \
 198                         (unsigned long long) _value);                   \
 199 }                                                                       \
 200 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,    \
 201                 struct kobj_attribute *attr,                            \
 202                 const char *buf, size_t len)                            \
 203 {                                                                       \
 204         unsigned long long value;                                       \
 205         if (sscanf(buf, _fmt_in, &value) != 1)                          \
 206                 return -EINVAL;                                         \
 207         _value = value;                                                 \
 208         return len;                                                     \
 209 }                                                                       \
 210 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 211         __ATTR(_name,(S_IRUGO | S_IWUSR),                               \
 212                         sys_##_prefix##_##_name##_show,                 \
 213                         sys_##_prefix##_##_name##_store);
 214
 215 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
 216 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,     \
 217                 struct kobj_attribute *attr,                            \
 218                 char *page)                                             \
 219 {                                                                       \
 220         return sprintf(page, _fmt_out, _value);                         \
 221 }                                                                       \
 222 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,    \
 223                 struct kobj_attribute *attr,                            \
 224                 const char *buf, size_t len)                            \
 225 {                                                                       \
 226         strncpy(_value, buf, sizeof(_value) - 1);                       \
 227         strim(_value);                                                  \
 228         return len;                                                     \
 229 }                                                                       \
 230 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 231         __ATTR(_name,(S_IRUGO | S_IWUSR),                               \
 232                         sys_##_prefix##_##_name##_show,                 \
 233                         sys_##_prefix##_##_name##_store);
 234
 235 static void make_attrs_ro(struct attribute **attrs)
 236 {
 237         while (*attrs) {
 238                 (*attrs)->mode = S_IRUGO;
 239                 attrs++;
 240         }
 241 }
 242
 243 /*
 244  * ipl section
 245  */
 246
 247 static __init enum ipl_type get_ipl_type(void)
 248 {
 249         struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
 250
 251         if (ipl_flags & IPL_NSS_VALID)
 252                 return IPL_TYPE_NSS;
 253         if (!(ipl_flags & IPL_DEVNO_VALID))
 254                 return IPL_TYPE_UNKNOWN;
 255         if (!(ipl_flags & IPL_PARMBLOCK_VALID))
 256                 return IPL_TYPE_CCW;
 257         if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
 258                 return IPL_TYPE_UNKNOWN;
 259         if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
 260                 return IPL_TYPE_UNKNOWN;
 261         if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
 262                 return IPL_TYPE_FCP_DUMP;
 263         return IPL_TYPE_FCP;
 264 }
 265
 266 struct ipl_info ipl_info;
 267 EXPORT_SYMBOL_GPL(ipl_info);
 268
 269 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
 270                              char *page)
 271 {
 272         return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
 273 }
 274
 275 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
 276
 277 /* VM IPL PARM routines */
 278 size_t reipl_get_ascii_vmparm(char *dest, size_t size,
 279                                    const struct ipl_parameter_block *ipb)
 280 {
 281         int i;
 282         size_t len;
 283         char has_lowercase = 0;
 284
 285         len = 0;
 286         if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
 287             (ipb->ipl_info.ccw.vm_parm_len > 0)) {
 288
 289                 len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
 290                 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
 291                 /* If at least one character is lowercase, we assume mixed
 292                  * case; otherwise we convert everything to lowercase.
 293                  */
 294                 for (i = 0; i < len; i++)
 295                         if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
 296                             (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
 297                             (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
 298                                 has_lowercase = 1;
 299                                 break;
 300                         }
 301                 if (!has_lowercase)
 302                         EBC_TOLOWER(dest, len);
 303                 EBCASC(dest, len);
 304         }
 305         dest[len] = 0;
 306
 307         return len;
 308 }
 309
 310 size_t append_ipl_vmparm(char *dest, size_t size)
 311 {
 312         size_t rc;
 313
 314         rc = 0;
 315         if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
 316                 rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
 317         else
 318                 dest[0] = 0;
 319         return rc;
 320 }
 321
 322 static ssize_t ipl_vm_parm_show(struct kobject *kobj,
 323                                 struct kobj_attribute *attr, char *page)
 324 {
 325         char parm[DIAG308_VMPARM_SIZE + 1] = {};
 326
 327         append_ipl_vmparm(parm, sizeof(parm));
 328         return sprintf(page, "%s\n", parm);
 329 }
 330
 331 static size_t scpdata_length(const char* buf, size_t count)
 332 {
 333         while (count) {
 334                 if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
 335                         break;
 336                 count--;
 337         }
 338         return count;
 339 }
 340
 341 size_t reipl_append_ascii_scpdata(char *dest, size_t size,
 342                                   const struct ipl_parameter_block *ipb)
 343 {
 344         size_t count;
 345         size_t i;
 346         int has_lowercase;
 347
 348         count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data,
 349                                              ipb->ipl_info.fcp.scp_data_len));
 350         if (!count)
 351                 goto out;
 352
 353         has_lowercase = 0;
 354         for (i = 0; i < count; i++) {
 355                 if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
 356                         count = 0;
 357                         goto out;
 358                 }
 359                 if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
 360                         has_lowercase = 1;
 361         }
 362
 363         if (has_lowercase)
 364                 memcpy(dest, ipb->ipl_info.fcp.scp_data, count);
 365         else
 366                 for (i = 0; i < count; i++)
 367                         dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]);
 368 out:
 369         dest[count] = '\0';
 370         return count;
 371 }
 372
 373 size_t append_ipl_scpdata(char *dest, size_t len)
 374 {
 375         size_t rc;
 376
 377         rc = 0;
 378         if (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP)
 379                 rc = reipl_append_ascii_scpdata(dest, len, &ipl_block);
 380         else
 381                 dest[0] = 0;
 382         return rc;
 383 }
 384
 385
 386 static struct kobj_attribute sys_ipl_vm_parm_attr =
 387         __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
 388
 389 static ssize_t sys_ipl_device_show(struct kobject *kobj,
 390                                    struct kobj_attribute *attr, char *page)
 391 {
 392         struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
 393
 394         switch (ipl_info.type) {
 395         case IPL_TYPE_CCW:
 396                 return sprintf(page, "0.0.%04x\n", ipl_devno);
 397         case IPL_TYPE_FCP:
 398         case IPL_TYPE_FCP_DUMP:
 399                 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
 400         default:
 401                 return 0;
 402         }
 403 }
 404
 405 static struct kobj_attribute sys_ipl_device_attr =
 406         __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
 407
 408 static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
 409                                   struct bin_attribute *attr, char *buf,
 410                                   loff_t off, size_t count)
 411 {
 412         return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START,
 413                                         IPL_PARMBLOCK_SIZE);
 414 }
 415
 416 static struct bin_attribute ipl_parameter_attr = {
 417         .attr = {
 418                 .name = "binary_parameter",
 419                 .mode = S_IRUGO,
 420         },
 421         .size = PAGE_SIZE,
 422         .read = &ipl_parameter_read,
 423 };
 424
 425 static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
 426                                  struct bin_attribute *attr, char *buf,
 427                                  loff_t off, size_t count)
 428 {
 429         unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
 430         void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
 431
 432         return memory_read_from_buffer(buf, count, &off, scp_data, size);
 433 }
 434
 435 static struct bin_attribute ipl_scp_data_attr = {
 436         .attr = {
 437                 .name = "scp_data",
 438                 .mode = S_IRUGO,
 439         },
 440         .size = PAGE_SIZE,
 441         .read = ipl_scp_data_read,
 442 };
 443
 444 /* FCP ipl device attributes */
 445
 446 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
 447                    IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
 448 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
 449                    IPL_PARMBLOCK_START->ipl_info.fcp.lun);
 450 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
 451                    IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
 452 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
 453                    IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
 454
 455 static struct attribute *ipl_fcp_attrs[] = {
 456         &sys_ipl_type_attr.attr,
 457         &sys_ipl_device_attr.attr,
 458         &sys_ipl_fcp_wwpn_attr.attr,
 459         &sys_ipl_fcp_lun_attr.attr,
 460         &sys_ipl_fcp_bootprog_attr.attr,
 461         &sys_ipl_fcp_br_lba_attr.attr,
 462         NULL,
 463 };
 464
 465 static struct attribute_group ipl_fcp_attr_group = {
 466         .attrs = ipl_fcp_attrs,
 467 };
 468
 469 /* CCW ipl device attributes */
 470
 471 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
 472                                      struct kobj_attribute *attr, char *page)
 473 {
 474         char loadparm[LOADPARM_LEN + 1] = {};
 475
 476         if (!sclp_ipl_info.is_valid)
 477                 return sprintf(page, "#unknown#\n");
 478         memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
 479         EBCASC(loadparm, LOADPARM_LEN);
 480         strim(loadparm);
 481         return sprintf(page, "%s\n", loadparm);
 482 }
 483
 484 static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
 485         __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
 486
 487 static struct attribute *ipl_ccw_attrs_vm[] = {
 488         &sys_ipl_type_attr.attr,
 489         &sys_ipl_device_attr.attr,
 490         &sys_ipl_ccw_loadparm_attr.attr,
 491         &sys_ipl_vm_parm_attr.attr,
 492         NULL,
 493 };
 494
 495 static struct attribute *ipl_ccw_attrs_lpar[] = {
 496         &sys_ipl_type_attr.attr,
 497         &sys_ipl_device_attr.attr,
 498         &sys_ipl_ccw_loadparm_attr.attr,
 499         NULL,
 500 };
 501
 502 static struct attribute_group ipl_ccw_attr_group_vm = {
 503         .attrs = ipl_ccw_attrs_vm,
 504 };
 505
 506 static struct attribute_group ipl_ccw_attr_group_lpar = {
 507         .attrs = ipl_ccw_attrs_lpar
 508 };
 509
 510 /* NSS ipl device attributes */
 511
 512 DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
 513
 514 static struct attribute *ipl_nss_attrs[] = {
 515         &sys_ipl_type_attr.attr,
 516         &sys_ipl_nss_name_attr.attr,
 517         &sys_ipl_ccw_loadparm_attr.attr,
 518         &sys_ipl_vm_parm_attr.attr,
 519         NULL,
 520 };
 521
 522 static struct attribute_group ipl_nss_attr_group = {
 523         .attrs = ipl_nss_attrs,
 524 };
 525
 526 /* UNKNOWN ipl device attributes */
 527
 528 static struct attribute *ipl_unknown_attrs[] = {
 529         &sys_ipl_type_attr.attr,
 530         NULL,
 531 };
 532
 533 static struct attribute_group ipl_unknown_attr_group = {
 534         .attrs = ipl_unknown_attrs,
 535 };
 536
 537 static struct kset *ipl_kset;
 538
 539 static int __init ipl_register_fcp_files(void)
 540 {
 541         int rc;
 542
 543         rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
 544         if (rc)
 545                 goto out;
 546         rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
 547         if (rc)
 548                 goto out_ipl_parm;
 549         rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_scp_data_attr);
 550         if (!rc)
 551                 goto out;
 552
 553         sysfs_remove_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
 554
 555 out_ipl_parm:
 556         sysfs_remove_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
 557 out:
 558         return rc;
 559 }
 560
 561 static void __ipl_run(void *unused)
 562 {
 563         diag308(DIAG308_IPL, NULL);
 564         if (MACHINE_IS_VM)
 565                 __cpcmd("IPL", NULL, 0, NULL);
 566         else if (ipl_info.type == IPL_TYPE_CCW)
 567                 reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
 568 }
 569
 570 static void ipl_run(struct shutdown_trigger *trigger)
 571 {
 572         smp_switch_to_ipl_cpu(__ipl_run, NULL);
 573 }
 574
 575 static int __init ipl_init(void)
 576 {
 577         int rc;
 578
 579         ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
 580         if (!ipl_kset) {
 581                 rc = -ENOMEM;
 582                 goto out;
 583         }
 584         switch (ipl_info.type) {
 585         case IPL_TYPE_CCW:
 586                 if (MACHINE_IS_VM)
 587                         rc = sysfs_create_group(&ipl_kset->kobj,
 588                                                 &ipl_ccw_attr_group_vm);
 589                 else
 590                         rc = sysfs_create_group(&ipl_kset->kobj,
 591                                                 &ipl_ccw_attr_group_lpar);
 592                 break;
 593         case IPL_TYPE_FCP:
 594         case IPL_TYPE_FCP_DUMP:
 595                 rc = ipl_register_fcp_files();
 596                 break;
 597         case IPL_TYPE_NSS:
 598                 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group);
 599                 break;
 600         default:
 601                 rc = sysfs_create_group(&ipl_kset->kobj,
 602                                         &ipl_unknown_attr_group);
 603                 break;
 604         }
 605 out:
 606         if (rc)
 607                 panic("ipl_init failed: rc = %i\n", rc);
 608
 609         return 0;
 610 }
 611
 612 static struct shutdown_action __refdata ipl_action = {
 613         .name   = SHUTDOWN_ACTION_IPL_STR,
 614         .fn     = ipl_run,
 615         .init   = ipl_init,
 616 };
 617
 618 /*
 619  * reipl shutdown action: Reboot Linux on shutdown.
 620  */
 621
 622 /* VM IPL PARM attributes */
 623 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
 624                                           char *page)
 625 {
 626         char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
 627
 628         reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
 629         return sprintf(page, "%s\n", vmparm);
 630 }
 631
 632 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
 633                                           size_t vmparm_max,
 634                                           const char *buf, size_t len)
 635 {
 636         int i, ip_len;
 637
 638         /* ignore trailing newline */
 639         ip_len = len;
 640         if ((len > 0) && (buf[len - 1] == '\n'))
 641                 ip_len--;
 642
 643         if (ip_len > vmparm_max)
 644                 return -EINVAL;
 645
 646         /* parm is used to store kernel options, check for common chars */
 647         for (i = 0; i < ip_len; i++)
 648                 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
 649                         return -EINVAL;
 650
 651         memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
 652         ipb->ipl_info.ccw.vm_parm_len = ip_len;
 653         if (ip_len > 0) {
 654                 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
 655                 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
 656                 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
 657         } else {
 658                 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
 659         }
 660
 661         return len;
 662 }
 663
 664 /* NSS wrapper */
 665 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
 666                                      struct kobj_attribute *attr, char *page)
 667 {
 668         return reipl_generic_vmparm_show(reipl_block_nss, page);
 669 }
 670
 671 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
 672                                       struct kobj_attribute *attr,
 673                                       const char *buf, size_t len)
 674 {
 675         return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
 676 }
 677
 678 /* CCW wrapper */
 679 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
 680                                      struct kobj_attribute *attr, char *page)
 681 {
 682         return reipl_generic_vmparm_show(reipl_block_ccw, page);
 683 }
 684
 685 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
 686                                       struct kobj_attribute *attr,
 687                                       const char *buf, size_t len)
 688 {
 689         return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
 690 }
 691
 692 static struct kobj_attribute sys_reipl_nss_vmparm_attr =
 693         __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
 694                                         reipl_nss_vmparm_store);
 695 static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
 696         __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
 697                                         reipl_ccw_vmparm_store);
 698
 699 /* FCP reipl device attributes */
 700
 701 static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
 702                                       struct bin_attribute *attr,
 703                                       char *buf, loff_t off, size_t count)
 704 {
 705         size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
 706         void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
 707
 708         return memory_read_from_buffer(buf, count, &off, scp_data, size);
 709 }
 710
 711 static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
 712                                        struct bin_attribute *attr,
 713                                        char *buf, loff_t off, size_t count)
 714 {
 715         size_t padding;
 716         size_t scpdata_len;
 717
 718         if (off < 0)
 719                 return -EINVAL;
 720
 721         if (off >= DIAG308_SCPDATA_SIZE)
 722                 return -ENOSPC;
 723
 724         if (count > DIAG308_SCPDATA_SIZE - off)
 725                 count = DIAG308_SCPDATA_SIZE - off;
 726
 727         memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf + off, count);
 728         scpdata_len = off + count;
 729
 730         if (scpdata_len % 8) {
 731                 padding = 8 - (scpdata_len % 8);
 732                 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
 733                        0, padding);
 734                 scpdata_len += padding;
 735         }
 736
 737         reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
 738         reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
 739         reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
 740
 741         return count;
 742 }
 743
 744 static struct bin_attribute sys_reipl_fcp_scp_data_attr = {
 745         .attr = {
 746                 .name = "scp_data",
 747                 .mode = S_IRUGO | S_IWUSR,
 748         },
 749         .size = PAGE_SIZE,
 750         .read = reipl_fcp_scpdata_read,
 751         .write = reipl_fcp_scpdata_write,
 752 };
 753
 754 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n",
 755                    reipl_block_fcp->ipl_info.fcp.wwpn);
 756 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n",
 757                    reipl_block_fcp->ipl_info.fcp.lun);
 758 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
 759                    reipl_block_fcp->ipl_info.fcp.bootprog);
 760 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
 761                    reipl_block_fcp->ipl_info.fcp.br_lba);
 762 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
 763                    reipl_block_fcp->ipl_info.fcp.devno);
 764
 765 static struct attribute *reipl_fcp_attrs[] = {
 766         &sys_reipl_fcp_device_attr.attr,
 767         &sys_reipl_fcp_wwpn_attr.attr,
 768         &sys_reipl_fcp_lun_attr.attr,
 769         &sys_reipl_fcp_bootprog_attr.attr,
 770         &sys_reipl_fcp_br_lba_attr.attr,
 771         NULL,
 772 };
 773
 774 static struct attribute_group reipl_fcp_attr_group = {
 775         .attrs = reipl_fcp_attrs,
 776 };
 777
 778 /* CCW reipl device attributes */
 779
 780 DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
 781         reipl_block_ccw->ipl_info.ccw.devno);
 782
 783 static void reipl_get_ascii_loadparm(char *loadparm,
 784                                      struct ipl_parameter_block *ibp)
 785 {
 786         memcpy(loadparm, ibp->ipl_info.ccw.load_parm, LOADPARM_LEN);
 787         EBCASC(loadparm, LOADPARM_LEN);
 788         loadparm[LOADPARM_LEN] = 0;
 789         strim(loadparm);
 790 }
 791
 792 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
 793                                            char *page)
 794 {
 795         char buf[LOADPARM_LEN + 1];
 796
 797         reipl_get_ascii_loadparm(buf, ipb);
 798         return sprintf(page, "%s\n", buf);
 799 }
 800
 801 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
 802                                             const char *buf, size_t len)
 803 {
 804         int i, lp_len;
 805
 806         /* ignore trailing newline */
 807         lp_len = len;
 808         if ((len > 0) && (buf[len - 1] == '\n'))
 809                 lp_len--;
 810         /* loadparm can have max 8 characters and must not start with a blank */
 811         if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
 812                 return -EINVAL;
 813         /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
 814         for (i = 0; i < lp_len; i++) {
 815                 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
 816                     (buf[i] == '.'))
 817                         continue;
 818                 return -EINVAL;
 819         }
 820         /* initialize loadparm with blanks */
 821         memset(ipb->ipl_info.ccw.load_parm, ' ', LOADPARM_LEN);
 822         /* copy and convert to ebcdic */
 823         memcpy(ipb->ipl_info.ccw.load_parm, buf, lp_len);
 824         ASCEBC(ipb->ipl_info.ccw.load_parm, LOADPARM_LEN);
 825         return len;
 826 }
 827
 828 /* NSS wrapper */
 829 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
 830                                        struct kobj_attribute *attr, char *page)
 831 {
 832         return reipl_generic_loadparm_show(reipl_block_nss, page);
 833 }
 834
 835 static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
 836                                         struct kobj_attribute *attr,
 837                                         const char *buf, size_t len)
 838 {
 839         return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
 840 }
 841
 842 /* CCW wrapper */
 843 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
 844                                        struct kobj_attribute *attr, char *page)
 845 {
 846         return reipl_generic_loadparm_show(reipl_block_ccw, page);
 847 }
 848
 849 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
 850                                         struct kobj_attribute *attr,
 851                                         const char *buf, size_t len)
 852 {
 853         return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
 854 }
 855
 856 static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
 857         __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
 858                                             reipl_ccw_loadparm_store);
 859
 860 static struct attribute *reipl_ccw_attrs_vm[] = {
 861         &sys_reipl_ccw_device_attr.attr,
 862         &sys_reipl_ccw_loadparm_attr.attr,
 863         &sys_reipl_ccw_vmparm_attr.attr,
 864         NULL,
 865 };
 866
 867 static struct attribute *reipl_ccw_attrs_lpar[] = {
 868         &sys_reipl_ccw_device_attr.attr,
 869         &sys_reipl_ccw_loadparm_attr.attr,
 870         NULL,
 871 };
 872
 873 static struct attribute_group reipl_ccw_attr_group_vm = {
 874         .name  = IPL_CCW_STR,
 875         .attrs = reipl_ccw_attrs_vm,
 876 };
 877
 878 static struct attribute_group reipl_ccw_attr_group_lpar = {
 879         .name  = IPL_CCW_STR,
 880         .attrs = reipl_ccw_attrs_lpar,
 881 };
 882
 883
 884 /* NSS reipl device attributes */
 885 static void reipl_get_ascii_nss_name(char *dst,
 886                                      struct ipl_parameter_block *ipb)
 887 {
 888         memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
 889         EBCASC(dst, NSS_NAME_SIZE);
 890         dst[NSS_NAME_SIZE] = 0;
 891 }
 892
 893 static ssize_t reipl_nss_name_show(struct kobject *kobj,
 894                                    struct kobj_attribute *attr, char *page)
 895 {
 896         char nss_name[NSS_NAME_SIZE + 1] = {};
 897
 898         reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
 899         return sprintf(page, "%s\n", nss_name);
 900 }
 901
 902 static ssize_t reipl_nss_name_store(struct kobject *kobj,
 903                                     struct kobj_attribute *attr,
 904                                     const char *buf, size_t len)
 905 {
 906         int nss_len;
 907
 908         /* ignore trailing newline */
 909         nss_len = len;
 910         if ((len > 0) && (buf[len - 1] == '\n'))
 911                 nss_len--;
 912
 913         if (nss_len > NSS_NAME_SIZE)
 914                 return -EINVAL;
 915
 916         memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
 917         if (nss_len > 0) {
 918                 reipl_block_nss->ipl_info.ccw.vm_flags |=
 919                         DIAG308_VM_FLAGS_NSS_VALID;
 920                 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
 921                 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
 922                 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
 923         } else {
 924                 reipl_block_nss->ipl_info.ccw.vm_flags &=
 925                         ~DIAG308_VM_FLAGS_NSS_VALID;
 926         }
 927
 928         return len;
 929 }
 930
 931 static struct kobj_attribute sys_reipl_nss_name_attr =
 932         __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
 933                                         reipl_nss_name_store);
 934
 935 static struct kobj_attribute sys_reipl_nss_loadparm_attr =
 936         __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
 937                                             reipl_nss_loadparm_store);
 938
 939 static struct attribute *reipl_nss_attrs[] = {
 940         &sys_reipl_nss_name_attr.attr,
 941         &sys_reipl_nss_loadparm_attr.attr,
 942         &sys_reipl_nss_vmparm_attr.attr,
 943         NULL,
 944 };
 945
 946 static struct attribute_group reipl_nss_attr_group = {
 947         .name  = IPL_NSS_STR,
 948         .attrs = reipl_nss_attrs,
 949 };
 950
 951 /* reipl type */
 952
 953 static int reipl_set_type(enum ipl_type type)
 954 {
 955         if (!(reipl_capabilities & type))
 956                 return -EINVAL;
 957
 958         switch(type) {
 959         case IPL_TYPE_CCW:
 960                 if (diag308_set_works)
 961                         reipl_method = REIPL_METHOD_CCW_DIAG;
 962                 else if (MACHINE_IS_VM)
 963                         reipl_method = REIPL_METHOD_CCW_VM;
 964                 else
 965                         reipl_method = REIPL_METHOD_CCW_CIO;
 966                 reipl_block_actual = reipl_block_ccw;
 967                 break;
 968         case IPL_TYPE_FCP:
 969                 if (diag308_set_works)
 970                         reipl_method = REIPL_METHOD_FCP_RW_DIAG;
 971                 else if (MACHINE_IS_VM)
 972                         reipl_method = REIPL_METHOD_FCP_RO_VM;
 973                 else
 974                         reipl_method = REIPL_METHOD_FCP_RO_DIAG;
 975                 reipl_block_actual = reipl_block_fcp;
 976                 break;
 977         case IPL_TYPE_FCP_DUMP:
 978                 reipl_method = REIPL_METHOD_FCP_DUMP;
 979                 break;
 980         case IPL_TYPE_NSS:
 981                 if (diag308_set_works)
 982                         reipl_method = REIPL_METHOD_NSS_DIAG;
 983                 else
 984                         reipl_method = REIPL_METHOD_NSS;
 985                 reipl_block_actual = reipl_block_nss;
 986                 break;
 987         case IPL_TYPE_UNKNOWN:
 988                 reipl_method = REIPL_METHOD_DEFAULT;
 989                 break;
 990         default:
 991                 BUG();
 992         }
 993         reipl_type = type;
 994         return 0;
 995 }
 996
 997 static ssize_t reipl_type_show(struct kobject *kobj,
 998                                struct kobj_attribute *attr, char *page)
 999 {
1000         return sprintf(page, "%s\n", ipl_type_str(reipl_type));
1001 }
1002
1003 static ssize_t reipl_type_store(struct kobject *kobj,
1004                                 struct kobj_attribute *attr,
1005                                 const char *buf, size_t len)
1006 {
1007         int rc = -EINVAL;
1008
1009         if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1010                 rc = reipl_set_type(IPL_TYPE_CCW);
1011         else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1012                 rc = reipl_set_type(IPL_TYPE_FCP);
1013         else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1014                 rc = reipl_set_type(IPL_TYPE_NSS);
1015         return (rc != 0) ? rc : len;
1016 }
1017
1018 static struct kobj_attribute reipl_type_attr =
1019         __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
1020
1021 static struct kset *reipl_kset;
1022 static struct kset *reipl_fcp_kset;
1023
1024 static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
1025                            const enum ipl_method m)
1026 {
1027         char loadparm[LOADPARM_LEN + 1] = {};
1028         char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
1029         char nss_name[NSS_NAME_SIZE + 1] = {};
1030         size_t pos = 0;
1031
1032         reipl_get_ascii_loadparm(loadparm, ipb);
1033         reipl_get_ascii_nss_name(nss_name, ipb);
1034         reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
1035
1036         switch (m) {
1037         case REIPL_METHOD_CCW_VM:
1038                 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
1039                 break;
1040         case REIPL_METHOD_NSS:
1041                 pos = sprintf(dst, "IPL %s", nss_name);
1042                 break;
1043         default:
1044                 break;
1045         }
1046         if (strlen(loadparm) > 0)
1047                 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
1048         if (strlen(vmparm) > 0)
1049                 sprintf(dst + pos, " PARM %s", vmparm);
1050 }
1051
1052 static void __reipl_run(void *unused)
1053 {
1054         struct ccw_dev_id devid;
1055         static char buf[128];
1056
1057         switch (reipl_method) {
1058         case REIPL_METHOD_CCW_CIO:
1059                 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
1060                 devid.ssid  = 0;
1061                 reipl_ccw_dev(&devid);
1062                 break;
1063         case REIPL_METHOD_CCW_VM:
1064                 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
1065                 __cpcmd(buf, NULL, 0, NULL);
1066                 break;
1067         case REIPL_METHOD_CCW_DIAG:
1068                 diag308(DIAG308_SET, reipl_block_ccw);
1069                 diag308(DIAG308_IPL, NULL);
1070                 break;
1071         case REIPL_METHOD_FCP_RW_DIAG:
1072                 diag308(DIAG308_SET, reipl_block_fcp);
1073                 diag308(DIAG308_IPL, NULL);
1074                 break;
1075         case REIPL_METHOD_FCP_RO_DIAG:
1076                 diag308(DIAG308_IPL, NULL);
1077                 break;
1078         case REIPL_METHOD_FCP_RO_VM:
1079                 __cpcmd("IPL", NULL, 0, NULL);
1080                 break;
1081         case REIPL_METHOD_NSS_DIAG:
1082                 diag308(DIAG308_SET, reipl_block_nss);
1083                 diag308(DIAG308_IPL, NULL);
1084                 break;
1085         case REIPL_METHOD_NSS:
1086                 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
1087                 __cpcmd(buf, NULL, 0, NULL);
1088                 break;
1089         case REIPL_METHOD_DEFAULT:
1090                 if (MACHINE_IS_VM)
1091                         __cpcmd("IPL", NULL, 0, NULL);
1092                 diag308(DIAG308_IPL, NULL);
1093                 break;
1094         case REIPL_METHOD_FCP_DUMP:
1095                 break;
1096         }
1097         disabled_wait((unsigned long) __builtin_return_address(0));
1098 }
1099
1100 static void reipl_run(struct shutdown_trigger *trigger)
1101 {
1102         smp_switch_to_ipl_cpu(__reipl_run, NULL);
1103 }
1104
1105 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
1106 {
1107         ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
1108         ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1109         ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1110         ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1111 }
1112
1113 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1114 {
1115         /* LOADPARM */
1116         /* check if read scp info worked and set loadparm */
1117         if (sclp_ipl_info.is_valid)
1118                 memcpy(ipb->ipl_info.ccw.load_parm,
1119                                 &sclp_ipl_info.loadparm, LOADPARM_LEN);
1120         else
1121                 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1122                 memset(ipb->ipl_info.ccw.load_parm, 0x40, LOADPARM_LEN);
1123         ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
1124
1125         /* VM PARM */
1126         if (MACHINE_IS_VM && diag308_set_works &&
1127             (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1128
1129                 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1130                 ipb->ipl_info.ccw.vm_parm_len =
1131                                         ipl_block.ipl_info.ccw.vm_parm_len;
1132                 memcpy(ipb->ipl_info.ccw.vm_parm,
1133                        ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1134         }
1135 }
1136
1137 static int __init reipl_nss_init(void)
1138 {
1139         int rc;
1140
1141         if (!MACHINE_IS_VM)
1142                 return 0;
1143
1144         reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1145         if (!reipl_block_nss)
1146                 return -ENOMEM;
1147
1148         if (!diag308_set_works)
1149                 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO;
1150
1151         rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1152         if (rc)
1153                 return rc;
1154
1155         reipl_block_ccw_init(reipl_block_nss);
1156         if (ipl_info.type == IPL_TYPE_NSS) {
1157                 memset(reipl_block_nss->ipl_info.ccw.nss_name,
1158                         ' ', NSS_NAME_SIZE);
1159                 memcpy(reipl_block_nss->ipl_info.ccw.nss_name,
1160                         kernel_nss_name, strlen(kernel_nss_name));
1161                 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
1162                 reipl_block_nss->ipl_info.ccw.vm_flags |=
1163                         DIAG308_VM_FLAGS_NSS_VALID;
1164
1165                 reipl_block_ccw_fill_parms(reipl_block_nss);
1166         }
1167
1168         reipl_capabilities |= IPL_TYPE_NSS;
1169         return 0;
1170 }
1171
1172 static int __init reipl_ccw_init(void)
1173 {
1174         int rc;
1175
1176         reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1177         if (!reipl_block_ccw)
1178                 return -ENOMEM;
1179
1180         if (MACHINE_IS_VM) {
1181                 if (!diag308_set_works)
1182                         sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
1183                 rc = sysfs_create_group(&reipl_kset->kobj,
1184                                         &reipl_ccw_attr_group_vm);
1185         } else {
1186                 if(!diag308_set_works)
1187                         sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
1188                 rc = sysfs_create_group(&reipl_kset->kobj,
1189                                         &reipl_ccw_attr_group_lpar);
1190         }
1191         if (rc)
1192                 return rc;
1193
1194         reipl_block_ccw_init(reipl_block_ccw);
1195         if (ipl_info.type == IPL_TYPE_CCW) {
1196                 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
1197                 reipl_block_ccw_fill_parms(reipl_block_ccw);
1198         }
1199
1200         reipl_capabilities |= IPL_TYPE_CCW;
1201         return 0;
1202 }
1203
1204 static int __init reipl_fcp_init(void)
1205 {
1206         int rc;
1207
1208         if (!diag308_set_works) {
1209                 if (ipl_info.type == IPL_TYPE_FCP) {
1210                         make_attrs_ro(reipl_fcp_attrs);
1211                         sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO;
1212                 } else
1213                         return 0;
1214         }
1215
1216         reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1217         if (!reipl_block_fcp)
1218                 return -ENOMEM;
1219
1220         /* sysfs: create fcp kset for mixing attr group and bin attrs */
1221         reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1222                                              &reipl_kset->kobj);
1223         if (!reipl_fcp_kset) {
1224                 free_page((unsigned long) reipl_block_fcp);
1225                 return -ENOMEM;
1226         }
1227
1228         rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1229         if (rc) {
1230                 kset_unregister(reipl_fcp_kset);
1231                 free_page((unsigned long) reipl_block_fcp);
1232                 return rc;
1233         }
1234
1235         rc = sysfs_create_bin_file(&reipl_fcp_kset->kobj,
1236                                    &sys_reipl_fcp_scp_data_attr);
1237         if (rc) {
1238                 sysfs_remove_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1239                 kset_unregister(reipl_fcp_kset);
1240                 free_page((unsigned long) reipl_block_fcp);
1241                 return rc;
1242         }
1243
1244         if (ipl_info.type == IPL_TYPE_FCP)
1245                 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
1246         else {
1247                 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1248                 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1249                 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1250                 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1251                 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1252         }
1253         reipl_capabilities |= IPL_TYPE_FCP;
1254         return 0;
1255 }
1256
1257 static int __init reipl_init(void)
1258 {
1259         int rc;
1260
1261         reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1262         if (!reipl_kset)
1263                 return -ENOMEM;
1264         rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1265         if (rc) {
1266                 kset_unregister(reipl_kset);
1267                 return rc;
1268         }
1269         rc = reipl_ccw_init();
1270         if (rc)
1271                 return rc;
1272         rc = reipl_fcp_init();
1273         if (rc)
1274                 return rc;
1275         rc = reipl_nss_init();
1276         if (rc)
1277                 return rc;
1278         rc = reipl_set_type(ipl_info.type);
1279         if (rc)
1280                 return rc;
1281         return 0;
1282 }
1283
1284 static struct shutdown_action __refdata reipl_action = {
1285         .name   = SHUTDOWN_ACTION_REIPL_STR,
1286         .fn     = reipl_run,
1287         .init   = reipl_init,
1288 };
1289
1290 /*
1291  * dump shutdown action: Dump Linux on shutdown.
1292  */
1293
1294 /* FCP dump device attributes */
1295
1296 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n",
1297                    dump_block_fcp->ipl_info.fcp.wwpn);
1298 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n",
1299                    dump_block_fcp->ipl_info.fcp.lun);
1300 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1301                    dump_block_fcp->ipl_info.fcp.bootprog);
1302 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1303                    dump_block_fcp->ipl_info.fcp.br_lba);
1304 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1305                    dump_block_fcp->ipl_info.fcp.devno);
1306
1307 static struct attribute *dump_fcp_attrs[] = {
1308         &sys_dump_fcp_device_attr.attr,
1309         &sys_dump_fcp_wwpn_attr.attr,
1310         &sys_dump_fcp_lun_attr.attr,
1311         &sys_dump_fcp_bootprog_attr.attr,
1312         &sys_dump_fcp_br_lba_attr.attr,
1313         NULL,
1314 };
1315
1316 static struct attribute_group dump_fcp_attr_group = {
1317         .name  = IPL_FCP_STR,
1318         .attrs = dump_fcp_attrs,
1319 };
1320
1321 /* CCW dump device attributes */
1322
1323 DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
1324                    dump_block_ccw->ipl_info.ccw.devno);
1325
1326 static struct attribute *dump_ccw_attrs[] = {
1327         &sys_dump_ccw_device_attr.attr,
1328         NULL,
1329 };
1330
1331 static struct attribute_group dump_ccw_attr_group = {
1332         .name  = IPL_CCW_STR,
1333         .attrs = dump_ccw_attrs,
1334 };
1335
1336 /* dump type */
1337
1338 static int dump_set_type(enum dump_type type)
1339 {
1340         if (!(dump_capabilities & type))
1341                 return -EINVAL;
1342         switch (type) {
1343         case DUMP_TYPE_CCW:
1344                 if (diag308_set_works)
1345                         dump_method = DUMP_METHOD_CCW_DIAG;
1346                 else if (MACHINE_IS_VM)
1347                         dump_method = DUMP_METHOD_CCW_VM;
1348                 else
1349                         dump_method = DUMP_METHOD_CCW_CIO;
1350                 break;
1351         case DUMP_TYPE_FCP:
1352                 dump_method = DUMP_METHOD_FCP_DIAG;
1353                 break;
1354         default:
1355                 dump_method = DUMP_METHOD_NONE;
1356         }
1357         dump_type = type;
1358         return 0;
1359 }
1360
1361 static ssize_t dump_type_show(struct kobject *kobj,
1362                               struct kobj_attribute *attr, char *page)
1363 {
1364         return sprintf(page, "%s\n", dump_type_str(dump_type));
1365 }
1366
1367 static ssize_t dump_type_store(struct kobject *kobj,
1368                                struct kobj_attribute *attr,
1369                                const char *buf, size_t len)
1370 {
1371         int rc = -EINVAL;
1372
1373         if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1374                 rc = dump_set_type(DUMP_TYPE_NONE);
1375         else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1376                 rc = dump_set_type(DUMP_TYPE_CCW);
1377         else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1378                 rc = dump_set_type(DUMP_TYPE_FCP);
1379         return (rc != 0) ? rc : len;
1380 }
1381
1382 static struct kobj_attribute dump_type_attr =
1383         __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1384
1385 static struct kset *dump_kset;
1386
1387 static void __dump_run(void *unused)
1388 {
1389         struct ccw_dev_id devid;
1390         static char buf[100];
1391
1392         switch (dump_method) {
1393         case DUMP_METHOD_CCW_CIO:
1394                 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
1395                 devid.ssid  = 0;
1396                 reipl_ccw_dev(&devid);
1397                 break;
1398         case DUMP_METHOD_CCW_VM:
1399                 sprintf(buf, "STORE STATUS");
1400                 __cpcmd(buf, NULL, 0, NULL);
1401                 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
1402                 __cpcmd(buf, NULL, 0, NULL);
1403                 break;
1404         case DUMP_METHOD_CCW_DIAG:
1405                 diag308(DIAG308_SET, dump_block_ccw);
1406                 diag308(DIAG308_DUMP, NULL);
1407                 break;
1408         case DUMP_METHOD_FCP_DIAG:
1409                 diag308(DIAG308_SET, dump_block_fcp);
1410                 diag308(DIAG308_DUMP, NULL);
1411                 break;
1412         default:
1413                 break;
1414         }
1415 }
1416
1417 static void dump_run(struct shutdown_trigger *trigger)
1418 {
1419         if (dump_method == DUMP_METHOD_NONE)
1420                 return;
1421         smp_send_stop();
1422         smp_switch_to_ipl_cpu(__dump_run, NULL);
1423 }
1424
1425 static int __init dump_ccw_init(void)
1426 {
1427         int rc;
1428
1429         dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1430         if (!dump_block_ccw)
1431                 return -ENOMEM;
1432         rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1433         if (rc) {
1434                 free_page((unsigned long)dump_block_ccw);
1435                 return rc;
1436         }
1437         dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1438         dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1439         dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1440         dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1441         dump_capabilities |= DUMP_TYPE_CCW;
1442         return 0;
1443 }
1444
1445 static int __init dump_fcp_init(void)
1446 {
1447         int rc;
1448
1449         if (!sclp_ipl_info.has_dump)
1450                 return 0; /* LDIPL DUMP is not installed */
1451         if (!diag308_set_works)
1452                 return 0;
1453         dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1454         if (!dump_block_fcp)
1455                 return -ENOMEM;
1456         rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1457         if (rc) {
1458                 free_page((unsigned long)dump_block_fcp);
1459                 return rc;
1460         }
1461         dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1462         dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1463         dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1464         dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1465         dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1466         dump_capabilities |= DUMP_TYPE_FCP;
1467         return 0;
1468 }
1469
1470 static int __init dump_init(void)
1471 {
1472         int rc;
1473
1474         dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1475         if (!dump_kset)
1476                 return -ENOMEM;
1477         rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1478         if (rc) {
1479                 kset_unregister(dump_kset);
1480                 return rc;
1481         }
1482         rc = dump_ccw_init();
1483         if (rc)
1484                 return rc;
1485         rc = dump_fcp_init();
1486         if (rc)
1487                 return rc;
1488         dump_set_type(DUMP_TYPE_NONE);
1489         return 0;
1490 }
1491
1492 static struct shutdown_action __refdata dump_action = {
1493         .name   = SHUTDOWN_ACTION_DUMP_STR,
1494         .fn     = dump_run,
1495         .init   = dump_init,
1496 };
1497
1498 static void dump_reipl_run(struct shutdown_trigger *trigger)
1499 {
1500         preempt_disable();
1501         /*
1502          * Bypass dynamic address translation (DAT) when storing IPL parameter
1503          * information block address and checksum into the prefix area
1504          * (corresponding to absolute addresses 0-8191).
1505          * When enhanced DAT applies and the STE format control in one,
1506          * the absolute address is formed without prefixing. In this case a
1507          * normal store (stg/st) into the prefix area would no more match to
1508          * absolute addresses 0-8191.
1509          */
1510 #ifdef CONFIG_64BIT
1511         asm volatile("sturg %0,%1"
1512                 :: "a" ((unsigned long) reipl_block_actual),
1513                 "a" (&lowcore_ptr[smp_processor_id()]->ipib));
1514 #else
1515         asm volatile("stura %0,%1"
1516                 :: "a" ((unsigned long) reipl_block_actual),
1517                 "a" (&lowcore_ptr[smp_processor_id()]->ipib));
1518 #endif
1519         asm volatile("stura %0,%1"
1520                 :: "a" (csum_partial(reipl_block_actual,
1521                                      reipl_block_actual->hdr.len, 0)),
1522                 "a" (&lowcore_ptr[smp_processor_id()]->ipib_checksum));
1523         preempt_enable();
1524         dump_run(trigger);
1525 }
1526
1527 static int __init dump_reipl_init(void)
1528 {
1529         if (!diag308_set_works)
1530                 return -EOPNOTSUPP;
1531         else
1532                 return 0;
1533 }
1534
1535 static struct shutdown_action __refdata dump_reipl_action = {
1536         .name   = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1537         .fn     = dump_reipl_run,
1538         .init   = dump_reipl_init,
1539 };
1540
1541 /*
1542  * vmcmd shutdown action: Trigger vm command on shutdown.
1543  */
1544
1545 static char vmcmd_on_reboot[128];
1546 static char vmcmd_on_panic[128];
1547 static char vmcmd_on_halt[128];
1548 static char vmcmd_on_poff[128];
1549 static char vmcmd_on_restart[128];
1550
1551 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1552 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1553 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1554 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1555 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1556
1557 static struct attribute *vmcmd_attrs[] = {
1558         &sys_vmcmd_on_reboot_attr.attr,
1559         &sys_vmcmd_on_panic_attr.attr,
1560         &sys_vmcmd_on_halt_attr.attr,
1561         &sys_vmcmd_on_poff_attr.attr,
1562         &sys_vmcmd_on_restart_attr.attr,
1563         NULL,
1564 };
1565
1566 static struct attribute_group vmcmd_attr_group = {
1567         .attrs = vmcmd_attrs,
1568 };
1569
1570 static struct kset *vmcmd_kset;
1571
1572 static void vmcmd_run(struct shutdown_trigger *trigger)
1573 {
1574         char *cmd, *next_cmd;
1575
1576         if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1577                 cmd = vmcmd_on_reboot;
1578         else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1579                 cmd = vmcmd_on_panic;
1580         else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1581                 cmd = vmcmd_on_halt;
1582         else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1583                 cmd = vmcmd_on_poff;
1584         else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
1585                 cmd = vmcmd_on_restart;
1586         else
1587                 return;
1588
1589         if (strlen(cmd) == 0)
1590                 return;
1591         do {
1592                 next_cmd = strchr(cmd, '\n');
1593                 if (next_cmd) {
1594                         next_cmd[0] = 0;
1595                         next_cmd += 1;
1596                 }
1597                 __cpcmd(cmd, NULL, 0, NULL);
1598                 cmd = next_cmd;
1599         } while (cmd != NULL);
1600 }
1601
1602 static int vmcmd_init(void)
1603 {
1604         if (!MACHINE_IS_VM)
1605                 return -EOPNOTSUPP;
1606         vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1607         if (!vmcmd_kset)
1608                 return -ENOMEM;
1609         return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1610 }
1611
1612 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1613                                               vmcmd_run, vmcmd_init};
1614
1615 /*
1616  * stop shutdown action: Stop Linux on shutdown.
1617  */
1618
1619 static void stop_run(struct shutdown_trigger *trigger)
1620 {
1621         if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
1622             strcmp(trigger->name, ON_RESTART_STR) == 0)
1623                 disabled_wait((unsigned long) __builtin_return_address(0));
1624         while (sigp(smp_processor_id(), sigp_stop) == sigp_busy)
1625                 cpu_relax();
1626         for (;;);
1627 }
1628
1629 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1630                                              stop_run, NULL};
1631
1632 /* action list */
1633
1634 static struct shutdown_action *shutdown_actions_list[] = {
1635         &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1636         &vmcmd_action, &stop_action};
1637 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1638
1639 /*
1640  * Trigger section
1641  */
1642
1643 static struct kset *shutdown_actions_kset;
1644
1645 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1646                        size_t len)
1647 {
1648         int i;
1649
1650         for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1651                 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1652                         if (shutdown_actions_list[i]->init_rc) {
1653                                 return shutdown_actions_list[i]->init_rc;
1654                         } else {
1655                                 trigger->action = shutdown_actions_list[i];
1656                                 return len;
1657                         }
1658                 }
1659         }
1660         return -EINVAL;
1661 }
1662
1663 /* on reipl */
1664
1665 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1666                                                     &reipl_action};
1667
1668 static ssize_t on_reboot_show(struct kobject *kobj,
1669                               struct kobj_attribute *attr, char *page)
1670 {
1671         return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1672 }
1673
1674 static ssize_t on_reboot_store(struct kobject *kobj,
1675                                struct kobj_attribute *attr,
1676                                const char *buf, size_t len)
1677 {
1678         return set_trigger(buf, &on_reboot_trigger, len);
1679 }
1680
1681 static struct kobj_attribute on_reboot_attr =
1682         __ATTR(on_reboot, 0644, on_reboot_show, on_reboot_store);
1683
1684 static void do_machine_restart(char *__unused)
1685 {
1686         smp_send_stop();
1687         on_reboot_trigger.action->fn(&on_reboot_trigger);
1688         reipl_run(NULL);
1689 }
1690 void (*_machine_restart)(char *command) = do_machine_restart;
1691
1692 /* on panic */
1693
1694 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1695
1696 static ssize_t on_panic_show(struct kobject *kobj,
1697                              struct kobj_attribute *attr, char *page)
1698 {
1699         return sprintf(page, "%s\n", on_panic_trigger.action->name);
1700 }
1701
1702 static ssize_t on_panic_store(struct kobject *kobj,
1703                               struct kobj_attribute *attr,
1704                               const char *buf, size_t len)
1705 {
1706         return set_trigger(buf, &on_panic_trigger, len);
1707 }
1708
1709 static struct kobj_attribute on_panic_attr =
1710         __ATTR(on_panic, 0644, on_panic_show, on_panic_store);
1711
1712 static void do_panic(void)
1713 {
1714         on_panic_trigger.action->fn(&on_panic_trigger);
1715         stop_run(&on_panic_trigger);
1716 }
1717
1718 /* on restart */
1719
1720 static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
1721         &stop_action};
1722
1723 static ssize_t on_restart_show(struct kobject *kobj,
1724                                struct kobj_attribute *attr, char *page)
1725 {
1726         return sprintf(page, "%s\n", on_restart_trigger.action->name);
1727 }
1728
1729 static ssize_t on_restart_store(struct kobject *kobj,
1730                                 struct kobj_attribute *attr,
1731                                 const char *buf, size_t len)
1732 {
1733         return set_trigger(buf, &on_restart_trigger, len);
1734 }
1735
1736 static struct kobj_attribute on_restart_attr =
1737         __ATTR(on_restart, 0644, on_restart_show, on_restart_store);
1738
1739 void do_restart(void)
1740 {
1741         smp_send_stop();
1742         on_restart_trigger.action->fn(&on_restart_trigger);
1743         stop_run(&on_restart_trigger);
1744 }
1745
1746 /* on halt */
1747
1748 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1749
1750 static ssize_t on_halt_show(struct kobject *kobj,
1751                             struct kobj_attribute *attr, char *page)
1752 {
1753         return sprintf(page, "%s\n", on_halt_trigger.action->name);
1754 }
1755
1756 static ssize_t on_halt_store(struct kobject *kobj,
1757                              struct kobj_attribute *attr,
1758                              const char *buf, size_t len)
1759 {
1760         return set_trigger(buf, &on_halt_trigger, len);
1761 }
1762
1763 static struct kobj_attribute on_halt_attr =
1764         __ATTR(on_halt, 0644, on_halt_show, on_halt_store);
1765
1766
1767 static void do_machine_halt(void)
1768 {
1769         smp_send_stop();
1770         on_halt_trigger.action->fn(&on_halt_trigger);
1771         stop_run(&on_halt_trigger);
1772 }
1773 void (*_machine_halt)(void) = do_machine_halt;
1774
1775 /* on power off */
1776
1777 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1778
1779 static ssize_t on_poff_show(struct kobject *kobj,
1780                             struct kobj_attribute *attr, char *page)
1781 {
1782         return sprintf(page, "%s\n", on_poff_trigger.action->name);
1783 }
1784
1785 static ssize_t on_poff_store(struct kobject *kobj,
1786                              struct kobj_attribute *attr,
1787                              const char *buf, size_t len)
1788 {
1789         return set_trigger(buf, &on_poff_trigger, len);
1790 }
1791
1792 static struct kobj_attribute on_poff_attr =
1793         __ATTR(on_poff, 0644, on_poff_show, on_poff_store);
1794
1795
1796 static void do_machine_power_off(void)
1797 {
1798         smp_send_stop();
1799         on_poff_trigger.action->fn(&on_poff_trigger);
1800         stop_run(&on_poff_trigger);
1801 }
1802 void (*_machine_power_off)(void) = do_machine_power_off;
1803
1804 static void __init shutdown_triggers_init(void)
1805 {
1806         shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1807                                                     firmware_kobj);
1808         if (!shutdown_actions_kset)
1809                 goto fail;
1810         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1811                               &on_reboot_attr.attr))
1812                 goto fail;
1813         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1814                               &on_panic_attr.attr))
1815                 goto fail;
1816         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1817                               &on_halt_attr.attr))
1818                 goto fail;
1819         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1820                               &on_poff_attr.attr))
1821                 goto fail;
1822         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1823                               &on_restart_attr.attr))
1824                 goto fail;
1825         return;
1826 fail:
1827         panic("shutdown_triggers_init failed\n");
1828 }
1829
1830 static void __init shutdown_actions_init(void)
1831 {
1832         int i;
1833
1834         for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1835                 if (!shutdown_actions_list[i]->init)
1836                         continue;
1837                 shutdown_actions_list[i]->init_rc =
1838                         shutdown_actions_list[i]->init();
1839         }
1840 }
1841
1842 static int __init s390_ipl_init(void)
1843 {
1844         sclp_get_ipl_info(&sclp_ipl_info);
1845         shutdown_actions_init();
1846         shutdown_triggers_init();
1847         return 0;
1848 }
1849
1850 __initcall(s390_ipl_init);
1851
1852 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1853 {
1854         int sx, dx;
1855
1856         dx = 0;
1857         for (sx = 0; src[sx] != 0; sx++) {
1858                 if (src[sx] == '"')
1859                         continue;
1860                 dst[dx++] = src[sx];
1861                 if (dx >= n)
1862                         break;
1863         }
1864 }
1865
1866 static int __init vmcmd_on_reboot_setup(char *str)
1867 {
1868         if (!MACHINE_IS_VM)
1869                 return 1;
1870         strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1871         vmcmd_on_reboot[127] = 0;
1872         on_reboot_trigger.action = &vmcmd_action;
1873         return 1;
1874 }
1875 __setup("vmreboot=", vmcmd_on_reboot_setup);
1876
1877 static int __init vmcmd_on_panic_setup(char *str)
1878 {
1879         if (!MACHINE_IS_VM)
1880                 return 1;
1881         strncpy_skip_quote(vmcmd_on_panic, str, 127);
1882         vmcmd_on_panic[127] = 0;
1883         on_panic_trigger.action = &vmcmd_action;
1884         return 1;
1885 }
1886 __setup("vmpanic=", vmcmd_on_panic_setup);
1887
1888 static int __init vmcmd_on_halt_setup(char *str)
1889 {
1890         if (!MACHINE_IS_VM)
1891                 return 1;
1892         strncpy_skip_quote(vmcmd_on_halt, str, 127);
1893         vmcmd_on_halt[127] = 0;
1894         on_halt_trigger.action = &vmcmd_action;
1895         return 1;
1896 }
1897 __setup("vmhalt=", vmcmd_on_halt_setup);
1898
1899 static int __init vmcmd_on_poff_setup(char *str)
1900 {
1901         if (!MACHINE_IS_VM)
1902                 return 1;
1903         strncpy_skip_quote(vmcmd_on_poff, str, 127);
1904         vmcmd_on_poff[127] = 0;
1905         on_poff_trigger.action = &vmcmd_action;
1906         return 1;
1907 }
1908 __setup("vmpoff=", vmcmd_on_poff_setup);
1909
1910 static int on_panic_notify(struct notifier_block *self,
1911                            unsigned long event, void *data)
1912 {
1913         do_panic();
1914         return NOTIFY_OK;
1915 }
1916
1917 static struct notifier_block on_panic_nb = {
1918         .notifier_call = on_panic_notify,
1919         .priority = INT_MIN,
1920 };
1921
1922 void __init setup_ipl(void)
1923 {
1924         ipl_info.type = get_ipl_type();
1925         switch (ipl_info.type) {
1926         case IPL_TYPE_CCW:
1927                 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1928                 ipl_info.data.ccw.dev_id.ssid = 0;
1929                 break;
1930         case IPL_TYPE_FCP:
1931         case IPL_TYPE_FCP_DUMP:
1932                 ipl_info.data.fcp.dev_id.devno =
1933                         IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1934                 ipl_info.data.fcp.dev_id.ssid = 0;
1935                 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1936                 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1937                 break;
1938         case IPL_TYPE_NSS:
1939                 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1940                         sizeof(ipl_info.data.nss.name));
1941                 break;
1942         case IPL_TYPE_UNKNOWN:
1943                 /* We have no info to copy */
1944                 break;
1945         }
1946         atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1947 }
1948
1949 void __init ipl_update_parameters(void)
1950 {
1951         int rc;
1952
1953         rc = diag308(DIAG308_STORE, &ipl_block);
1954         if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
1955                 diag308_set_works = 1;
1956 }
1957
1958 void __init ipl_save_parameters(void)
1959 {
1960         struct cio_iplinfo iplinfo;
1961         void *src, *dst;
1962
1963         if (cio_get_iplinfo(&iplinfo))
1964                 return;
1965
1966         ipl_devno = iplinfo.devno;
1967         ipl_flags |= IPL_DEVNO_VALID;
1968         if (!iplinfo.is_qdio)
1969                 return;
1970         ipl_flags |= IPL_PARMBLOCK_VALID;
1971         src = (void *)(unsigned long)S390_lowcore.ipl_parmblock_ptr;
1972         dst = (void *)IPL_PARMBLOCK_ORIGIN;
1973         memmove(dst, src, PAGE_SIZE);
1974         S390_lowcore.ipl_parmblock_ptr = IPL_PARMBLOCK_ORIGIN;
1975 }
1976
1977 static LIST_HEAD(rcall);
1978 static DEFINE_MUTEX(rcall_mutex);
1979
1980 void register_reset_call(struct reset_call *reset)
1981 {
1982         mutex_lock(&rcall_mutex);
1983         list_add(&reset->list, &rcall);
1984         mutex_unlock(&rcall_mutex);
1985 }
1986 EXPORT_SYMBOL_GPL(register_reset_call);
1987
1988 void unregister_reset_call(struct reset_call *reset)
1989 {
1990         mutex_lock(&rcall_mutex);
1991         list_del(&reset->list);
1992         mutex_unlock(&rcall_mutex);
1993 }
1994 EXPORT_SYMBOL_GPL(unregister_reset_call);
1995
1996 static void do_reset_calls(void)
1997 {
1998         struct reset_call *reset;
1999
2000 #ifdef CONFIG_64BIT
2001         if (diag308_set_works) {
2002                 diag308_reset();
2003                 return;
2004         }
2005 #endif
2006         list_for_each_entry(reset, &rcall, list)
2007                 reset->fn();
2008 }
2009
2010 u32 dump_prefix_page;
2011
2012 void s390_reset_system(void)
2013 {
2014         struct _lowcore *lc;
2015
2016         lc = (struct _lowcore *)(unsigned long) store_prefix();
2017
2018         /* Stack for interrupt/machine check handler */
2019         lc->panic_stack = S390_lowcore.panic_stack;
2020
2021         /* Save prefix page address for dump case */
2022         dump_prefix_page = (u32)(unsigned long) lc;
2023
2024         /* Disable prefixing */
2025         set_prefix(0);
2026
2027         /* Disable lowcore protection */
2028         __ctl_clear_bit(0,28);
2029
2030         /* Set new machine check handler */
2031         S390_lowcore.mcck_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
2032         S390_lowcore.mcck_new_psw.addr =
2033                 PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;
2034
2035         /* Set new program check handler */
2036         S390_lowcore.program_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
2037         S390_lowcore.program_new_psw.addr =
2038                 PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
2039
2040         do_reset_calls();
2041 }
2042