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. 2005,2012
   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 <linux/debug_locks.h>
  21 #include <asm/ipl.h>
  22 #include <asm/smp.h>
  23 #include <asm/setup.h>
  24 #include <asm/cpcmd.h>
  25 #include <asm/cio.h>
  26 #include <asm/ebcdic.h>
  27 #include <asm/reset.h>
  28 #include <asm/sclp.h>
  29 #include <asm/checksum.h>
  30 #include <asm/debug.h>
  31 #include <asm/os_info.h>
  32 #include "entry.h"
  33
  34 #define IPL_PARM_BLOCK_VERSION 0
  35
  36 #define IPL_UNKNOWN_STR         "unknown"
  37 #define IPL_CCW_STR             "ccw"
  38 #define IPL_FCP_STR             "fcp"
  39 #define IPL_FCP_DUMP_STR        "fcp_dump"
  40 #define IPL_NSS_STR             "nss"
  41
  42 #define DUMP_CCW_STR            "ccw"
  43 #define DUMP_FCP_STR            "fcp"
  44 #define DUMP_NONE_STR           "none"
  45
  46 /*
  47  * Four shutdown trigger types are supported:
  48  * - panic
  49  * - halt
  50  * - power off
  51  * - reipl
  52  * - restart
  53  */
  54 #define ON_PANIC_STR            "on_panic"
  55 #define ON_HALT_STR             "on_halt"
  56 #define ON_POFF_STR             "on_poff"
  57 #define ON_REIPL_STR            "on_reboot"
  58 #define ON_RESTART_STR          "on_restart"
  59
  60 struct shutdown_action;
  61 struct shutdown_trigger {
  62         char *name;
  63         struct shutdown_action *action;
  64 };
  65
  66 /*
  67  * The following shutdown action types are supported:
  68  */
  69 #define SHUTDOWN_ACTION_IPL_STR         "ipl"
  70 #define SHUTDOWN_ACTION_REIPL_STR       "reipl"
  71 #define SHUTDOWN_ACTION_DUMP_STR        "dump"
  72 #define SHUTDOWN_ACTION_VMCMD_STR       "vmcmd"
  73 #define SHUTDOWN_ACTION_STOP_STR        "stop"
  74 #define SHUTDOWN_ACTION_DUMP_REIPL_STR  "dump_reipl"
  75
  76 struct shutdown_action {
  77         char *name;
  78         void (*fn) (struct shutdown_trigger *trigger);
  79         int (*init) (void);
  80         int init_rc;
  81 };
  82
  83 static char *ipl_type_str(enum ipl_type type)
  84 {
  85         switch (type) {
  86         case IPL_TYPE_CCW:
  87                 return IPL_CCW_STR;
  88         case IPL_TYPE_FCP:
  89                 return IPL_FCP_STR;
  90         case IPL_TYPE_FCP_DUMP:
  91                 return IPL_FCP_DUMP_STR;
  92         case IPL_TYPE_NSS:
  93                 return IPL_NSS_STR;
  94         case IPL_TYPE_UNKNOWN:
  95         default:
  96                 return IPL_UNKNOWN_STR;
  97         }
  98 }
  99
 100 enum dump_type {
 101         DUMP_TYPE_NONE  = 1,
 102         DUMP_TYPE_CCW   = 2,
 103         DUMP_TYPE_FCP   = 4,
 104 };
 105
 106 static char *dump_type_str(enum dump_type type)
 107 {
 108         switch (type) {
 109         case DUMP_TYPE_NONE:
 110                 return DUMP_NONE_STR;
 111         case DUMP_TYPE_CCW:
 112                 return DUMP_CCW_STR;
 113         case DUMP_TYPE_FCP:
 114                 return DUMP_FCP_STR;
 115         default:
 116                 return NULL;
 117         }
 118 }
 119
 120 /*
 121  * Must be in data section since the bss section
 122  * is not cleared when these are accessed.
 123  */
 124 static u16 ipl_devno __attribute__((__section__(".data"))) = 0;
 125 u32 ipl_flags __attribute__((__section__(".data"))) = 0;
 126
 127 enum ipl_method {
 128         REIPL_METHOD_CCW_CIO,
 129         REIPL_METHOD_CCW_DIAG,
 130         REIPL_METHOD_CCW_VM,
 131         REIPL_METHOD_FCP_RO_DIAG,
 132         REIPL_METHOD_FCP_RW_DIAG,
 133         REIPL_METHOD_FCP_RO_VM,
 134         REIPL_METHOD_FCP_DUMP,
 135         REIPL_METHOD_NSS,
 136         REIPL_METHOD_NSS_DIAG,
 137         REIPL_METHOD_DEFAULT,
 138 };
 139
 140 enum dump_method {
 141         DUMP_METHOD_NONE,
 142         DUMP_METHOD_CCW_CIO,
 143         DUMP_METHOD_CCW_DIAG,
 144         DUMP_METHOD_CCW_VM,
 145         DUMP_METHOD_FCP_DIAG,
 146 };
 147
 148 static int diag308_set_works = 0;
 149
 150 static struct ipl_parameter_block ipl_block;
 151
 152 static int reipl_capabilities = IPL_TYPE_UNKNOWN;
 153
 154 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
 155 static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
 156 static struct ipl_parameter_block *reipl_block_fcp;
 157 static struct ipl_parameter_block *reipl_block_ccw;
 158 static struct ipl_parameter_block *reipl_block_nss;
 159 static struct ipl_parameter_block *reipl_block_actual;
 160
 161 static int dump_capabilities = DUMP_TYPE_NONE;
 162 static enum dump_type dump_type = DUMP_TYPE_NONE;
 163 static enum dump_method dump_method = DUMP_METHOD_NONE;
 164 static struct ipl_parameter_block *dump_block_fcp;
 165 static struct ipl_parameter_block *dump_block_ccw;
 166
 167 static struct sclp_ipl_info sclp_ipl_info;
 168
 169 int diag308(unsigned long subcode, void *addr)
 170 {
 171         register unsigned long _addr asm("0") = (unsigned long) addr;
 172         register unsigned long _rc asm("1") = 0;
 173
 174         asm volatile(
 175                 "       diag    %0,%2,0x308\n"
 176                 "0:\n"
 177                 EX_TABLE(0b,0b)
 178                 : "+d" (_addr), "+d" (_rc)
 179                 : "d" (subcode) : "cc", "memory");
 180         return _rc;
 181 }
 182 EXPORT_SYMBOL_GPL(diag308);
 183
 184 /* SYSFS */
 185
 186 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value)             \
 187 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,     \
 188                 struct kobj_attribute *attr,                            \
 189                 char *page)                                             \
 190 {                                                                       \
 191         return sprintf(page, _format, _value);                          \
 192 }                                                                       \
 193 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 194         __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL);
 195
 196 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)   \
 197 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,     \
 198                 struct kobj_attribute *attr,                            \
 199                 char *page)                                             \
 200 {                                                                       \
 201         return sprintf(page, _fmt_out,                                  \
 202                         (unsigned long long) _value);                   \
 203 }                                                                       \
 204 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,    \
 205                 struct kobj_attribute *attr,                            \
 206                 const char *buf, size_t len)                            \
 207 {                                                                       \
 208         unsigned long long value;                                       \
 209         if (sscanf(buf, _fmt_in, &value) != 1)                          \
 210                 return -EINVAL;                                         \
 211         _value = value;                                                 \
 212         return len;                                                     \
 213 }                                                                       \
 214 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 215         __ATTR(_name,(S_IRUGO | S_IWUSR),                               \
 216                         sys_##_prefix##_##_name##_show,                 \
 217                         sys_##_prefix##_##_name##_store);
 218
 219 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
 220 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,     \
 221                 struct kobj_attribute *attr,                            \
 222                 char *page)                                             \
 223 {                                                                       \
 224         return sprintf(page, _fmt_out, _value);                         \
 225 }                                                                       \
 226 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,    \
 227                 struct kobj_attribute *attr,                            \
 228                 const char *buf, size_t len)                            \
 229 {                                                                       \
 230         strncpy(_value, buf, sizeof(_value) - 1);                       \
 231         strim(_value);                                                  \
 232         return len;                                                     \
 233 }                                                                       \
 234 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 235         __ATTR(_name,(S_IRUGO | S_IWUSR),                               \
 236                         sys_##_prefix##_##_name##_show,                 \
 237                         sys_##_prefix##_##_name##_store);
 238
 239 static void make_attrs_ro(struct attribute **attrs)
 240 {
 241         while (*attrs) {
 242                 (*attrs)->mode = S_IRUGO;
 243                 attrs++;
 244         }
 245 }
 246
 247 /*
 248  * ipl section
 249  */
 250
 251 static __init enum ipl_type get_ipl_type(void)
 252 {
 253         struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
 254
 255         if (ipl_flags & IPL_NSS_VALID)
 256                 return IPL_TYPE_NSS;
 257         if (!(ipl_flags & IPL_DEVNO_VALID))
 258                 return IPL_TYPE_UNKNOWN;
 259         if (!(ipl_flags & IPL_PARMBLOCK_VALID))
 260                 return IPL_TYPE_CCW;
 261         if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
 262                 return IPL_TYPE_UNKNOWN;
 263         if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
 264                 return IPL_TYPE_UNKNOWN;
 265         if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
 266                 return IPL_TYPE_FCP_DUMP;
 267         return IPL_TYPE_FCP;
 268 }
 269
 270 struct ipl_info ipl_info;
 271 EXPORT_SYMBOL_GPL(ipl_info);
 272
 273 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
 274                              char *page)
 275 {
 276         return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
 277 }
 278
 279 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
 280
 281 /* VM IPL PARM routines */
 282 static size_t reipl_get_ascii_vmparm(char *dest, size_t size,
 283                                      const struct ipl_parameter_block *ipb)
 284 {
 285         int i;
 286         size_t len;
 287         char has_lowercase = 0;
 288
 289         len = 0;
 290         if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
 291             (ipb->ipl_info.ccw.vm_parm_len > 0)) {
 292
 293                 len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
 294                 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
 295                 /* If at least one character is lowercase, we assume mixed
 296                  * case; otherwise we convert everything to lowercase.
 297                  */
 298                 for (i = 0; i < len; i++)
 299                         if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
 300                             (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
 301                             (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
 302                                 has_lowercase = 1;
 303                                 break;
 304                         }
 305                 if (!has_lowercase)
 306                         EBC_TOLOWER(dest, len);
 307                 EBCASC(dest, len);
 308         }
 309         dest[len] = 0;
 310
 311         return len;
 312 }
 313
 314 size_t append_ipl_vmparm(char *dest, size_t size)
 315 {
 316         size_t rc;
 317
 318         rc = 0;
 319         if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
 320                 rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
 321         else
 322                 dest[0] = 0;
 323         return rc;
 324 }
 325
 326 static ssize_t ipl_vm_parm_show(struct kobject *kobj,
 327                                 struct kobj_attribute *attr, char *page)
 328 {
 329         char parm[DIAG308_VMPARM_SIZE + 1] = {};
 330
 331         append_ipl_vmparm(parm, sizeof(parm));
 332         return sprintf(page, "%s\n", parm);
 333 }
 334
 335 static size_t scpdata_length(const char* buf, size_t count)
 336 {
 337         while (count) {
 338                 if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
 339                         break;
 340                 count--;
 341         }
 342         return count;
 343 }
 344
 345 static size_t reipl_append_ascii_scpdata(char *dest, size_t size,
 346                                          const struct ipl_parameter_block *ipb)
 347 {
 348         size_t count;
 349         size_t i;
 350         int has_lowercase;
 351
 352         count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data,
 353                                              ipb->ipl_info.fcp.scp_data_len));
 354         if (!count)
 355                 goto out;
 356
 357         has_lowercase = 0;
 358         for (i = 0; i < count; i++) {
 359                 if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
 360                         count = 0;
 361                         goto out;
 362                 }
 363                 if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
 364                         has_lowercase = 1;
 365         }
 366
 367         if (has_lowercase)
 368                 memcpy(dest, ipb->ipl_info.fcp.scp_data, count);
 369         else
 370                 for (i = 0; i < count; i++)
 371                         dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]);
 372 out:
 373         dest[count] = '\0';
 374         return count;
 375 }
 376
 377 size_t append_ipl_scpdata(char *dest, size_t len)
 378 {
 379         size_t rc;
 380
 381         rc = 0;
 382         if (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP)
 383                 rc = reipl_append_ascii_scpdata(dest, len, &ipl_block);
 384         else
 385                 dest[0] = 0;
 386         return rc;
 387 }
 388
 389
 390 static struct kobj_attribute sys_ipl_vm_parm_attr =
 391         __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
 392
 393 static ssize_t sys_ipl_device_show(struct kobject *kobj,
 394                                    struct kobj_attribute *attr, char *page)
 395 {
 396         struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
 397
 398         switch (ipl_info.type) {
 399         case IPL_TYPE_CCW:
 400                 return sprintf(page, "0.0.%04x\n", ipl_devno);
 401         case IPL_TYPE_FCP:
 402         case IPL_TYPE_FCP_DUMP:
 403                 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
 404         default:
 405                 return 0;
 406         }
 407 }
 408
 409 static struct kobj_attribute sys_ipl_device_attr =
 410         __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
 411
 412 static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
 413                                   struct bin_attribute *attr, char *buf,
 414                                   loff_t off, size_t count)
 415 {
 416         return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START,
 417                                         IPL_PARMBLOCK_SIZE);
 418 }
 419
 420 static struct bin_attribute ipl_parameter_attr = {
 421         .attr = {
 422                 .name = "binary_parameter",
 423                 .mode = S_IRUGO,
 424         },
 425         .size = PAGE_SIZE,
 426         .read = &ipl_parameter_read,
 427 };
 428
 429 static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
 430                                  struct bin_attribute *attr, char *buf,
 431                                  loff_t off, size_t count)
 432 {
 433         unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
 434         void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
 435
 436         return memory_read_from_buffer(buf, count, &off, scp_data, size);
 437 }
 438
 439 static struct bin_attribute ipl_scp_data_attr = {
 440         .attr = {
 441                 .name = "scp_data",
 442                 .mode = S_IRUGO,
 443         },
 444         .size = PAGE_SIZE,
 445         .read = ipl_scp_data_read,
 446 };
 447
 448 /* FCP ipl device attributes */
 449
 450 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
 451                    IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
 452 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
 453                    IPL_PARMBLOCK_START->ipl_info.fcp.lun);
 454 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
 455                    IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
 456 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
 457                    IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
 458
 459 static struct attribute *ipl_fcp_attrs[] = {
 460         &sys_ipl_type_attr.attr,
 461         &sys_ipl_device_attr.attr,
 462         &sys_ipl_fcp_wwpn_attr.attr,
 463         &sys_ipl_fcp_lun_attr.attr,
 464         &sys_ipl_fcp_bootprog_attr.attr,
 465         &sys_ipl_fcp_br_lba_attr.attr,
 466         NULL,
 467 };
 468
 469 static struct attribute_group ipl_fcp_attr_group = {
 470         .attrs = ipl_fcp_attrs,
 471 };
 472
 473 /* CCW ipl device attributes */
 474
 475 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
 476                                      struct kobj_attribute *attr, char *page)
 477 {
 478         char loadparm[LOADPARM_LEN + 1] = {};
 479
 480         if (!sclp_ipl_info.is_valid)
 481                 return sprintf(page, "#unknown#\n");
 482         memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
 483         EBCASC(loadparm, LOADPARM_LEN);
 484         strim(loadparm);
 485         return sprintf(page, "%s\n", loadparm);
 486 }
 487
 488 static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
 489         __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
 490
 491 static struct attribute *ipl_ccw_attrs_vm[] = {
 492         &sys_ipl_type_attr.attr,
 493         &sys_ipl_device_attr.attr,
 494         &sys_ipl_ccw_loadparm_attr.attr,
 495         &sys_ipl_vm_parm_attr.attr,
 496         NULL,
 497 };
 498
 499 static struct attribute *ipl_ccw_attrs_lpar[] = {
 500         &sys_ipl_type_attr.attr,
 501         &sys_ipl_device_attr.attr,
 502         &sys_ipl_ccw_loadparm_attr.attr,
 503         NULL,
 504 };
 505
 506 static struct attribute_group ipl_ccw_attr_group_vm = {
 507         .attrs = ipl_ccw_attrs_vm,
 508 };
 509
 510 static struct attribute_group ipl_ccw_attr_group_lpar = {
 511         .attrs = ipl_ccw_attrs_lpar
 512 };
 513
 514 /* NSS ipl device attributes */
 515
 516 DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
 517
 518 static struct attribute *ipl_nss_attrs[] = {
 519         &sys_ipl_type_attr.attr,
 520         &sys_ipl_nss_name_attr.attr,
 521         &sys_ipl_ccw_loadparm_attr.attr,
 522         &sys_ipl_vm_parm_attr.attr,
 523         NULL,
 524 };
 525
 526 static struct attribute_group ipl_nss_attr_group = {
 527         .attrs = ipl_nss_attrs,
 528 };
 529
 530 /* UNKNOWN ipl device attributes */
 531
 532 static struct attribute *ipl_unknown_attrs[] = {
 533         &sys_ipl_type_attr.attr,
 534         NULL,
 535 };
 536
 537 static struct attribute_group ipl_unknown_attr_group = {
 538         .attrs = ipl_unknown_attrs,
 539 };
 540
 541 static struct kset *ipl_kset;
 542
 543 static int __init ipl_register_fcp_files(void)
 544 {
 545         int rc;
 546
 547         rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
 548         if (rc)
 549                 goto out;
 550         rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
 551         if (rc)
 552                 goto out_ipl_parm;
 553         rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_scp_data_attr);
 554         if (!rc)
 555                 goto out;
 556
 557         sysfs_remove_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
 558
 559 out_ipl_parm:
 560         sysfs_remove_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
 561 out:
 562         return rc;
 563 }
 564
 565 static void __ipl_run(void *unused)
 566 {
 567         diag308(DIAG308_IPL, NULL);
 568         if (MACHINE_IS_VM)
 569                 __cpcmd("IPL", NULL, 0, NULL);
 570         else if (ipl_info.type == IPL_TYPE_CCW)
 571                 reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
 572 }
 573
 574 static void ipl_run(struct shutdown_trigger *trigger)
 575 {
 576         smp_call_ipl_cpu(__ipl_run, NULL);
 577 }
 578
 579 static int __init ipl_init(void)
 580 {
 581         int rc;
 582
 583         ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
 584         if (!ipl_kset) {
 585                 rc = -ENOMEM;
 586                 goto out;
 587         }
 588         switch (ipl_info.type) {
 589         case IPL_TYPE_CCW:
 590                 if (MACHINE_IS_VM)
 591                         rc = sysfs_create_group(&ipl_kset->kobj,
 592                                                 &ipl_ccw_attr_group_vm);
 593                 else
 594                         rc = sysfs_create_group(&ipl_kset->kobj,
 595                                                 &ipl_ccw_attr_group_lpar);
 596                 break;
 597         case IPL_TYPE_FCP:
 598         case IPL_TYPE_FCP_DUMP:
 599                 rc = ipl_register_fcp_files();
 600                 break;
 601         case IPL_TYPE_NSS:
 602                 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group);
 603                 break;
 604         default:
 605                 rc = sysfs_create_group(&ipl_kset->kobj,
 606                                         &ipl_unknown_attr_group);
 607                 break;
 608         }
 609 out:
 610         if (rc)
 611                 panic("ipl_init failed: rc = %i\n", rc);
 612
 613         return 0;
 614 }
 615
 616 static struct shutdown_action __refdata ipl_action = {
 617         .name   = SHUTDOWN_ACTION_IPL_STR,
 618         .fn     = ipl_run,
 619         .init   = ipl_init,
 620 };
 621
 622 /*
 623  * reipl shutdown action: Reboot Linux on shutdown.
 624  */
 625
 626 /* VM IPL PARM attributes */
 627 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
 628                                           char *page)
 629 {
 630         char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
 631
 632         reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
 633         return sprintf(page, "%s\n", vmparm);
 634 }
 635
 636 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
 637                                           size_t vmparm_max,
 638                                           const char *buf, size_t len)
 639 {
 640         int i, ip_len;
 641
 642         /* ignore trailing newline */
 643         ip_len = len;
 644         if ((len > 0) && (buf[len - 1] == '\n'))
 645                 ip_len--;
 646
 647         if (ip_len > vmparm_max)
 648                 return -EINVAL;
 649
 650         /* parm is used to store kernel options, check for common chars */
 651         for (i = 0; i < ip_len; i++)
 652                 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
 653                         return -EINVAL;
 654
 655         memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
 656         ipb->ipl_info.ccw.vm_parm_len = ip_len;
 657         if (ip_len > 0) {
 658                 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
 659                 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
 660                 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
 661         } else {
 662                 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
 663         }
 664
 665         return len;
 666 }
 667
 668 /* NSS wrapper */
 669 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
 670                                      struct kobj_attribute *attr, char *page)
 671 {
 672         return reipl_generic_vmparm_show(reipl_block_nss, page);
 673 }
 674
 675 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
 676                                       struct kobj_attribute *attr,
 677                                       const char *buf, size_t len)
 678 {
 679         return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
 680 }
 681
 682 /* CCW wrapper */
 683 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
 684                                      struct kobj_attribute *attr, char *page)
 685 {
 686         return reipl_generic_vmparm_show(reipl_block_ccw, page);
 687 }
 688
 689 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
 690                                       struct kobj_attribute *attr,
 691                                       const char *buf, size_t len)
 692 {
 693         return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
 694 }
 695
 696 static struct kobj_attribute sys_reipl_nss_vmparm_attr =
 697         __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
 698                                         reipl_nss_vmparm_store);
 699 static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
 700         __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
 701                                         reipl_ccw_vmparm_store);
 702
 703 /* FCP reipl device attributes */
 704
 705 static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
 706                                       struct bin_attribute *attr,
 707                                       char *buf, loff_t off, size_t count)
 708 {
 709         size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
 710         void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
 711
 712         return memory_read_from_buffer(buf, count, &off, scp_data, size);
 713 }
 714
 715 static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
 716                                        struct bin_attribute *attr,
 717                                        char *buf, loff_t off, size_t count)
 718 {
 719         size_t padding;
 720         size_t scpdata_len;
 721
 722         if (off < 0)
 723                 return -EINVAL;
 724
 725         if (off >= DIAG308_SCPDATA_SIZE)
 726                 return -ENOSPC;
 727
 728         if (count > DIAG308_SCPDATA_SIZE - off)
 729                 count = DIAG308_SCPDATA_SIZE - off;
 730
 731         memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf + off, count);
 732         scpdata_len = off + count;
 733
 734         if (scpdata_len % 8) {
 735                 padding = 8 - (scpdata_len % 8);
 736                 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
 737                        0, padding);
 738                 scpdata_len += padding;
 739         }
 740
 741         reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
 742         reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
 743         reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
 744
 745         return count;
 746 }
 747
 748 static struct bin_attribute sys_reipl_fcp_scp_data_attr = {
 749         .attr = {
 750                 .name = "scp_data",
 751                 .mode = S_IRUGO | S_IWUSR,
 752         },
 753         .size = PAGE_SIZE,
 754         .read = reipl_fcp_scpdata_read,
 755         .write = reipl_fcp_scpdata_write,
 756 };
 757
 758 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n",
 759                    reipl_block_fcp->ipl_info.fcp.wwpn);
 760 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n",
 761                    reipl_block_fcp->ipl_info.fcp.lun);
 762 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
 763                    reipl_block_fcp->ipl_info.fcp.bootprog);
 764 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
 765                    reipl_block_fcp->ipl_info.fcp.br_lba);
 766 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
 767                    reipl_block_fcp->ipl_info.fcp.devno);
 768
 769 static struct attribute *reipl_fcp_attrs[] = {
 770         &sys_reipl_fcp_device_attr.attr,
 771         &sys_reipl_fcp_wwpn_attr.attr,
 772         &sys_reipl_fcp_lun_attr.attr,
 773         &sys_reipl_fcp_bootprog_attr.attr,
 774         &sys_reipl_fcp_br_lba_attr.attr,
 775         NULL,
 776 };
 777
 778 static struct attribute_group reipl_fcp_attr_group = {
 779         .attrs = reipl_fcp_attrs,
 780 };
 781
 782 /* CCW reipl device attributes */
 783
 784 DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
 785         reipl_block_ccw->ipl_info.ccw.devno);
 786
 787 static void reipl_get_ascii_loadparm(char *loadparm,
 788                                      struct ipl_parameter_block *ibp)
 789 {
 790         memcpy(loadparm, ibp->ipl_info.ccw.load_parm, LOADPARM_LEN);
 791         EBCASC(loadparm, LOADPARM_LEN);
 792         loadparm[LOADPARM_LEN] = 0;
 793         strim(loadparm);
 794 }
 795
 796 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
 797                                            char *page)
 798 {
 799         char buf[LOADPARM_LEN + 1];
 800
 801         reipl_get_ascii_loadparm(buf, ipb);
 802         return sprintf(page, "%s\n", buf);
 803 }
 804
 805 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
 806                                             const char *buf, size_t len)
 807 {
 808         int i, lp_len;
 809
 810         /* ignore trailing newline */
 811         lp_len = len;
 812         if ((len > 0) && (buf[len - 1] == '\n'))
 813                 lp_len--;
 814         /* loadparm can have max 8 characters and must not start with a blank */
 815         if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
 816                 return -EINVAL;
 817         /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
 818         for (i = 0; i < lp_len; i++) {
 819                 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
 820                     (buf[i] == '.'))
 821                         continue;
 822                 return -EINVAL;
 823         }
 824         /* initialize loadparm with blanks */
 825         memset(ipb->ipl_info.ccw.load_parm, ' ', LOADPARM_LEN);
 826         /* copy and convert to ebcdic */
 827         memcpy(ipb->ipl_info.ccw.load_parm, buf, lp_len);
 828         ASCEBC(ipb->ipl_info.ccw.load_parm, LOADPARM_LEN);
 829         return len;
 830 }
 831
 832 /* NSS wrapper */
 833 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
 834                                        struct kobj_attribute *attr, char *page)
 835 {
 836         return reipl_generic_loadparm_show(reipl_block_nss, page);
 837 }
 838
 839 static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
 840                                         struct kobj_attribute *attr,
 841                                         const char *buf, size_t len)
 842 {
 843         return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
 844 }
 845
 846 /* CCW wrapper */
 847 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
 848                                        struct kobj_attribute *attr, char *page)
 849 {
 850         return reipl_generic_loadparm_show(reipl_block_ccw, page);
 851 }
 852
 853 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
 854                                         struct kobj_attribute *attr,
 855                                         const char *buf, size_t len)
 856 {
 857         return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
 858 }
 859
 860 static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
 861         __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
 862                                             reipl_ccw_loadparm_store);
 863
 864 static struct attribute *reipl_ccw_attrs_vm[] = {
 865         &sys_reipl_ccw_device_attr.attr,
 866         &sys_reipl_ccw_loadparm_attr.attr,
 867         &sys_reipl_ccw_vmparm_attr.attr,
 868         NULL,
 869 };
 870
 871 static struct attribute *reipl_ccw_attrs_lpar[] = {
 872         &sys_reipl_ccw_device_attr.attr,
 873         &sys_reipl_ccw_loadparm_attr.attr,
 874         NULL,
 875 };
 876
 877 static struct attribute_group reipl_ccw_attr_group_vm = {
 878         .name  = IPL_CCW_STR,
 879         .attrs = reipl_ccw_attrs_vm,
 880 };
 881
 882 static struct attribute_group reipl_ccw_attr_group_lpar = {
 883         .name  = IPL_CCW_STR,
 884         .attrs = reipl_ccw_attrs_lpar,
 885 };
 886
 887
 888 /* NSS reipl device attributes */
 889 static void reipl_get_ascii_nss_name(char *dst,
 890                                      struct ipl_parameter_block *ipb)
 891 {
 892         memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
 893         EBCASC(dst, NSS_NAME_SIZE);
 894         dst[NSS_NAME_SIZE] = 0;
 895 }
 896
 897 static ssize_t reipl_nss_name_show(struct kobject *kobj,
 898                                    struct kobj_attribute *attr, char *page)
 899 {
 900         char nss_name[NSS_NAME_SIZE + 1] = {};
 901
 902         reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
 903         return sprintf(page, "%s\n", nss_name);
 904 }
 905
 906 static ssize_t reipl_nss_name_store(struct kobject *kobj,
 907                                     struct kobj_attribute *attr,
 908                                     const char *buf, size_t len)
 909 {
 910         int nss_len;
 911
 912         /* ignore trailing newline */
 913         nss_len = len;
 914         if ((len > 0) && (buf[len - 1] == '\n'))
 915                 nss_len--;
 916
 917         if (nss_len > NSS_NAME_SIZE)
 918                 return -EINVAL;
 919
 920         memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
 921         if (nss_len > 0) {
 922                 reipl_block_nss->ipl_info.ccw.vm_flags |=
 923                         DIAG308_VM_FLAGS_NSS_VALID;
 924                 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
 925                 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
 926                 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
 927         } else {
 928                 reipl_block_nss->ipl_info.ccw.vm_flags &=
 929                         ~DIAG308_VM_FLAGS_NSS_VALID;
 930         }
 931
 932         return len;
 933 }
 934
 935 static struct kobj_attribute sys_reipl_nss_name_attr =
 936         __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
 937                                         reipl_nss_name_store);
 938
 939 static struct kobj_attribute sys_reipl_nss_loadparm_attr =
 940         __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
 941                                             reipl_nss_loadparm_store);
 942
 943 static struct attribute *reipl_nss_attrs[] = {
 944         &sys_reipl_nss_name_attr.attr,
 945         &sys_reipl_nss_loadparm_attr.attr,
 946         &sys_reipl_nss_vmparm_attr.attr,
 947         NULL,
 948 };
 949
 950 static struct attribute_group reipl_nss_attr_group = {
 951         .name  = IPL_NSS_STR,
 952         .attrs = reipl_nss_attrs,
 953 };
 954
 955 static void set_reipl_block_actual(struct ipl_parameter_block *reipl_block)
 956 {
 957         reipl_block_actual = reipl_block;
 958         os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual,
 959                           reipl_block->hdr.len);
 960 }
 961
 962 /* reipl type */
 963
 964 static int reipl_set_type(enum ipl_type type)
 965 {
 966         if (!(reipl_capabilities & type))
 967                 return -EINVAL;
 968
 969         switch(type) {
 970         case IPL_TYPE_CCW:
 971                 if (diag308_set_works)
 972                         reipl_method = REIPL_METHOD_CCW_DIAG;
 973                 else if (MACHINE_IS_VM)
 974                         reipl_method = REIPL_METHOD_CCW_VM;
 975                 else
 976                         reipl_method = REIPL_METHOD_CCW_CIO;
 977                 set_reipl_block_actual(reipl_block_ccw);
 978                 break;
 979         case IPL_TYPE_FCP:
 980                 if (diag308_set_works)
 981                         reipl_method = REIPL_METHOD_FCP_RW_DIAG;
 982                 else if (MACHINE_IS_VM)
 983                         reipl_method = REIPL_METHOD_FCP_RO_VM;
 984                 else
 985                         reipl_method = REIPL_METHOD_FCP_RO_DIAG;
 986                 set_reipl_block_actual(reipl_block_fcp);
 987                 break;
 988         case IPL_TYPE_FCP_DUMP:
 989                 reipl_method = REIPL_METHOD_FCP_DUMP;
 990                 break;
 991         case IPL_TYPE_NSS:
 992                 if (diag308_set_works)
 993                         reipl_method = REIPL_METHOD_NSS_DIAG;
 994                 else
 995                         reipl_method = REIPL_METHOD_NSS;
 996                 set_reipl_block_actual(reipl_block_nss);
 997                 break;
 998         case IPL_TYPE_UNKNOWN:
 999                 reipl_method = REIPL_METHOD_DEFAULT;
1000                 break;
1001         default:
1002                 BUG();
1003         }
1004         reipl_type = type;
1005         return 0;
1006 }
1007
1008 static ssize_t reipl_type_show(struct kobject *kobj,
1009                                struct kobj_attribute *attr, char *page)
1010 {
1011         return sprintf(page, "%s\n", ipl_type_str(reipl_type));
1012 }
1013
1014 static ssize_t reipl_type_store(struct kobject *kobj,
1015                                 struct kobj_attribute *attr,
1016                                 const char *buf, size_t len)
1017 {
1018         int rc = -EINVAL;
1019
1020         if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1021                 rc = reipl_set_type(IPL_TYPE_CCW);
1022         else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1023                 rc = reipl_set_type(IPL_TYPE_FCP);
1024         else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1025                 rc = reipl_set_type(IPL_TYPE_NSS);
1026         return (rc != 0) ? rc : len;
1027 }
1028
1029 static struct kobj_attribute reipl_type_attr =
1030         __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
1031
1032 static struct kset *reipl_kset;
1033 static struct kset *reipl_fcp_kset;
1034
1035 static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
1036                            const enum ipl_method m)
1037 {
1038         char loadparm[LOADPARM_LEN + 1] = {};
1039         char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
1040         char nss_name[NSS_NAME_SIZE + 1] = {};
1041         size_t pos = 0;
1042
1043         reipl_get_ascii_loadparm(loadparm, ipb);
1044         reipl_get_ascii_nss_name(nss_name, ipb);
1045         reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
1046
1047         switch (m) {
1048         case REIPL_METHOD_CCW_VM:
1049                 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
1050                 break;
1051         case REIPL_METHOD_NSS:
1052                 pos = sprintf(dst, "IPL %s", nss_name);
1053                 break;
1054         default:
1055                 break;
1056         }
1057         if (strlen(loadparm) > 0)
1058                 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
1059         if (strlen(vmparm) > 0)
1060                 sprintf(dst + pos, " PARM %s", vmparm);
1061 }
1062
1063 static void __reipl_run(void *unused)
1064 {
1065         struct ccw_dev_id devid;
1066         static char buf[128];
1067
1068         switch (reipl_method) {
1069         case REIPL_METHOD_CCW_CIO:
1070                 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
1071                 devid.ssid  = 0;
1072                 reipl_ccw_dev(&devid);
1073                 break;
1074         case REIPL_METHOD_CCW_VM:
1075                 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
1076                 __cpcmd(buf, NULL, 0, NULL);
1077                 break;
1078         case REIPL_METHOD_CCW_DIAG:
1079                 diag308(DIAG308_SET, reipl_block_ccw);
1080                 diag308(DIAG308_IPL, NULL);
1081                 break;
1082         case REIPL_METHOD_FCP_RW_DIAG:
1083                 diag308(DIAG308_SET, reipl_block_fcp);
1084                 diag308(DIAG308_IPL, NULL);
1085                 break;
1086         case REIPL_METHOD_FCP_RO_DIAG:
1087                 diag308(DIAG308_IPL, NULL);
1088                 break;
1089         case REIPL_METHOD_FCP_RO_VM:
1090                 __cpcmd("IPL", NULL, 0, NULL);
1091                 break;
1092         case REIPL_METHOD_NSS_DIAG:
1093                 diag308(DIAG308_SET, reipl_block_nss);
1094                 diag308(DIAG308_IPL, NULL);
1095                 break;
1096         case REIPL_METHOD_NSS:
1097                 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
1098                 __cpcmd(buf, NULL, 0, NULL);
1099                 break;
1100         case REIPL_METHOD_DEFAULT:
1101                 if (MACHINE_IS_VM)
1102                         __cpcmd("IPL", NULL, 0, NULL);
1103                 diag308(DIAG308_IPL, NULL);
1104                 break;
1105         case REIPL_METHOD_FCP_DUMP:
1106                 break;
1107         }
1108         disabled_wait((unsigned long) __builtin_return_address(0));
1109 }
1110
1111 static void reipl_run(struct shutdown_trigger *trigger)
1112 {
1113         smp_call_ipl_cpu(__reipl_run, NULL);
1114 }
1115
1116 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
1117 {
1118         ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
1119         ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1120         ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1121         ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1122 }
1123
1124 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1125 {
1126         /* LOADPARM */
1127         /* check if read scp info worked and set loadparm */
1128         if (sclp_ipl_info.is_valid)
1129                 memcpy(ipb->ipl_info.ccw.load_parm,
1130                                 &sclp_ipl_info.loadparm, LOADPARM_LEN);
1131         else
1132                 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1133                 memset(ipb->ipl_info.ccw.load_parm, 0x40, LOADPARM_LEN);
1134         ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
1135
1136         /* VM PARM */
1137         if (MACHINE_IS_VM && diag308_set_works &&
1138             (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1139
1140                 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1141                 ipb->ipl_info.ccw.vm_parm_len =
1142                                         ipl_block.ipl_info.ccw.vm_parm_len;
1143                 memcpy(ipb->ipl_info.ccw.vm_parm,
1144                        ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1145         }
1146 }
1147
1148 static int __init reipl_nss_init(void)
1149 {
1150         int rc;
1151
1152         if (!MACHINE_IS_VM)
1153                 return 0;
1154
1155         reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1156         if (!reipl_block_nss)
1157                 return -ENOMEM;
1158
1159         if (!diag308_set_works)
1160                 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO;
1161
1162         rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1163         if (rc)
1164                 return rc;
1165
1166         reipl_block_ccw_init(reipl_block_nss);
1167         if (ipl_info.type == IPL_TYPE_NSS) {
1168                 memset(reipl_block_nss->ipl_info.ccw.nss_name,
1169                         ' ', NSS_NAME_SIZE);
1170                 memcpy(reipl_block_nss->ipl_info.ccw.nss_name,
1171                         kernel_nss_name, strlen(kernel_nss_name));
1172                 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
1173                 reipl_block_nss->ipl_info.ccw.vm_flags |=
1174                         DIAG308_VM_FLAGS_NSS_VALID;
1175
1176                 reipl_block_ccw_fill_parms(reipl_block_nss);
1177         }
1178
1179         reipl_capabilities |= IPL_TYPE_NSS;
1180         return 0;
1181 }
1182
1183 static int __init reipl_ccw_init(void)
1184 {
1185         int rc;
1186
1187         reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1188         if (!reipl_block_ccw)
1189                 return -ENOMEM;
1190
1191         if (MACHINE_IS_VM) {
1192                 if (!diag308_set_works)
1193                         sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
1194                 rc = sysfs_create_group(&reipl_kset->kobj,
1195                                         &reipl_ccw_attr_group_vm);
1196         } else {
1197                 if(!diag308_set_works)
1198                         sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
1199                 rc = sysfs_create_group(&reipl_kset->kobj,
1200                                         &reipl_ccw_attr_group_lpar);
1201         }
1202         if (rc)
1203                 return rc;
1204
1205         reipl_block_ccw_init(reipl_block_ccw);
1206         if (ipl_info.type == IPL_TYPE_CCW) {
1207                 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
1208                 reipl_block_ccw_fill_parms(reipl_block_ccw);
1209         }
1210
1211         reipl_capabilities |= IPL_TYPE_CCW;
1212         return 0;
1213 }
1214
1215 static int __init reipl_fcp_init(void)
1216 {
1217         int rc;
1218
1219         if (!diag308_set_works) {
1220                 if (ipl_info.type == IPL_TYPE_FCP) {
1221                         make_attrs_ro(reipl_fcp_attrs);
1222                         sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO;
1223                 } else
1224                         return 0;
1225         }
1226
1227         reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1228         if (!reipl_block_fcp)
1229                 return -ENOMEM;
1230
1231         /* sysfs: create fcp kset for mixing attr group and bin attrs */
1232         reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1233                                              &reipl_kset->kobj);
1234         if (!reipl_fcp_kset) {
1235                 free_page((unsigned long) reipl_block_fcp);
1236                 return -ENOMEM;
1237         }
1238
1239         rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1240         if (rc) {
1241                 kset_unregister(reipl_fcp_kset);
1242                 free_page((unsigned long) reipl_block_fcp);
1243                 return rc;
1244         }
1245
1246         rc = sysfs_create_bin_file(&reipl_fcp_kset->kobj,
1247                                    &sys_reipl_fcp_scp_data_attr);
1248         if (rc) {
1249                 sysfs_remove_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1250                 kset_unregister(reipl_fcp_kset);
1251                 free_page((unsigned long) reipl_block_fcp);
1252                 return rc;
1253         }
1254
1255         if (ipl_info.type == IPL_TYPE_FCP)
1256                 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
1257         else {
1258                 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1259                 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1260                 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1261                 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1262                 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1263         }
1264         reipl_capabilities |= IPL_TYPE_FCP;
1265         return 0;
1266 }
1267
1268 static int __init reipl_type_init(void)
1269 {
1270         enum ipl_type reipl_type = ipl_info.type;
1271         struct ipl_parameter_block *reipl_block;
1272         unsigned long size;
1273
1274         reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size);
1275         if (!reipl_block)
1276                 goto out;
1277         /*
1278          * If we have an OS info reipl block, this will be used
1279          */
1280         if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_FCP) {
1281                 memcpy(reipl_block_fcp, reipl_block, size);
1282                 reipl_type = IPL_TYPE_FCP;
1283         } else if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_CCW) {
1284                 memcpy(reipl_block_ccw, reipl_block, size);
1285                 reipl_type = IPL_TYPE_CCW;
1286         }
1287 out:
1288         return reipl_set_type(reipl_type);
1289 }
1290
1291 static int __init reipl_init(void)
1292 {
1293         int rc;
1294
1295         reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1296         if (!reipl_kset)
1297                 return -ENOMEM;
1298         rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1299         if (rc) {
1300                 kset_unregister(reipl_kset);
1301                 return rc;
1302         }
1303         rc = reipl_ccw_init();
1304         if (rc)
1305                 return rc;
1306         rc = reipl_fcp_init();
1307         if (rc)
1308                 return rc;
1309         rc = reipl_nss_init();
1310         if (rc)
1311                 return rc;
1312         return reipl_type_init();
1313 }
1314
1315 static struct shutdown_action __refdata reipl_action = {
1316         .name   = SHUTDOWN_ACTION_REIPL_STR,
1317         .fn     = reipl_run,
1318         .init   = reipl_init,
1319 };
1320
1321 /*
1322  * dump shutdown action: Dump Linux on shutdown.
1323  */
1324
1325 /* FCP dump device attributes */
1326
1327 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n",
1328                    dump_block_fcp->ipl_info.fcp.wwpn);
1329 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n",
1330                    dump_block_fcp->ipl_info.fcp.lun);
1331 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1332                    dump_block_fcp->ipl_info.fcp.bootprog);
1333 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1334                    dump_block_fcp->ipl_info.fcp.br_lba);
1335 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1336                    dump_block_fcp->ipl_info.fcp.devno);
1337
1338 static struct attribute *dump_fcp_attrs[] = {
1339         &sys_dump_fcp_device_attr.attr,
1340         &sys_dump_fcp_wwpn_attr.attr,
1341         &sys_dump_fcp_lun_attr.attr,
1342         &sys_dump_fcp_bootprog_attr.attr,
1343         &sys_dump_fcp_br_lba_attr.attr,
1344         NULL,
1345 };
1346
1347 static struct attribute_group dump_fcp_attr_group = {
1348         .name  = IPL_FCP_STR,
1349         .attrs = dump_fcp_attrs,
1350 };
1351
1352 /* CCW dump device attributes */
1353
1354 DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
1355                    dump_block_ccw->ipl_info.ccw.devno);
1356
1357 static struct attribute *dump_ccw_attrs[] = {
1358         &sys_dump_ccw_device_attr.attr,
1359         NULL,
1360 };
1361
1362 static struct attribute_group dump_ccw_attr_group = {
1363         .name  = IPL_CCW_STR,
1364         .attrs = dump_ccw_attrs,
1365 };
1366
1367 /* dump type */
1368
1369 static int dump_set_type(enum dump_type type)
1370 {
1371         if (!(dump_capabilities & type))
1372                 return -EINVAL;
1373         switch (type) {
1374         case DUMP_TYPE_CCW:
1375                 if (diag308_set_works)
1376                         dump_method = DUMP_METHOD_CCW_DIAG;
1377                 else if (MACHINE_IS_VM)
1378                         dump_method = DUMP_METHOD_CCW_VM;
1379                 else
1380                         dump_method = DUMP_METHOD_CCW_CIO;
1381                 break;
1382         case DUMP_TYPE_FCP:
1383                 dump_method = DUMP_METHOD_FCP_DIAG;
1384                 break;
1385         default:
1386                 dump_method = DUMP_METHOD_NONE;
1387         }
1388         dump_type = type;
1389         return 0;
1390 }
1391
1392 static ssize_t dump_type_show(struct kobject *kobj,
1393                               struct kobj_attribute *attr, char *page)
1394 {
1395         return sprintf(page, "%s\n", dump_type_str(dump_type));
1396 }
1397
1398 static ssize_t dump_type_store(struct kobject *kobj,
1399                                struct kobj_attribute *attr,
1400                                const char *buf, size_t len)
1401 {
1402         int rc = -EINVAL;
1403
1404         if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1405                 rc = dump_set_type(DUMP_TYPE_NONE);
1406         else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1407                 rc = dump_set_type(DUMP_TYPE_CCW);
1408         else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1409                 rc = dump_set_type(DUMP_TYPE_FCP);
1410         return (rc != 0) ? rc : len;
1411 }
1412
1413 static struct kobj_attribute dump_type_attr =
1414         __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1415
1416 static struct kset *dump_kset;
1417
1418 static void __dump_run(void *unused)
1419 {
1420         struct ccw_dev_id devid;
1421         static char buf[100];
1422
1423         switch (dump_method) {
1424         case DUMP_METHOD_CCW_CIO:
1425                 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
1426                 devid.ssid  = 0;
1427                 reipl_ccw_dev(&devid);
1428                 break;
1429         case DUMP_METHOD_CCW_VM:
1430                 sprintf(buf, "STORE STATUS");
1431                 __cpcmd(buf, NULL, 0, NULL);
1432                 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
1433                 __cpcmd(buf, NULL, 0, NULL);
1434                 break;
1435         case DUMP_METHOD_CCW_DIAG:
1436                 diag308(DIAG308_SET, dump_block_ccw);
1437                 diag308(DIAG308_DUMP, NULL);
1438                 break;
1439         case DUMP_METHOD_FCP_DIAG:
1440                 diag308(DIAG308_SET, dump_block_fcp);
1441                 diag308(DIAG308_DUMP, NULL);
1442                 break;
1443         default:
1444                 break;
1445         }
1446 }
1447
1448 static void dump_run(struct shutdown_trigger *trigger)
1449 {
1450         if (dump_method == DUMP_METHOD_NONE)
1451                 return;
1452         smp_send_stop();
1453         smp_call_ipl_cpu(__dump_run, NULL);
1454 }
1455
1456 static int __init dump_ccw_init(void)
1457 {
1458         int rc;
1459
1460         dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1461         if (!dump_block_ccw)
1462                 return -ENOMEM;
1463         rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1464         if (rc) {
1465                 free_page((unsigned long)dump_block_ccw);
1466                 return rc;
1467         }
1468         dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1469         dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1470         dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1471         dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1472         dump_capabilities |= DUMP_TYPE_CCW;
1473         return 0;
1474 }
1475
1476 static int __init dump_fcp_init(void)
1477 {
1478         int rc;
1479
1480         if (!sclp_ipl_info.has_dump)
1481                 return 0; /* LDIPL DUMP is not installed */
1482         if (!diag308_set_works)
1483                 return 0;
1484         dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1485         if (!dump_block_fcp)
1486                 return -ENOMEM;
1487         rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1488         if (rc) {
1489                 free_page((unsigned long)dump_block_fcp);
1490                 return rc;
1491         }
1492         dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1493         dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1494         dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1495         dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1496         dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1497         dump_capabilities |= DUMP_TYPE_FCP;
1498         return 0;
1499 }
1500
1501 static int __init dump_init(void)
1502 {
1503         int rc;
1504
1505         dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1506         if (!dump_kset)
1507                 return -ENOMEM;
1508         rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1509         if (rc) {
1510                 kset_unregister(dump_kset);
1511                 return rc;
1512         }
1513         rc = dump_ccw_init();
1514         if (rc)
1515                 return rc;
1516         rc = dump_fcp_init();
1517         if (rc)
1518                 return rc;
1519         dump_set_type(DUMP_TYPE_NONE);
1520         return 0;
1521 }
1522
1523 static struct shutdown_action __refdata dump_action = {
1524         .name   = SHUTDOWN_ACTION_DUMP_STR,
1525         .fn     = dump_run,
1526         .init   = dump_init,
1527 };
1528
1529 static void dump_reipl_run(struct shutdown_trigger *trigger)
1530 {
1531         u32 csum;
1532
1533         csum = csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
1534         copy_to_absolute_zero(&S390_lowcore.ipib_checksum, &csum, sizeof(csum));
1535         copy_to_absolute_zero(&S390_lowcore.ipib, &reipl_block_actual,
1536                               sizeof(reipl_block_actual));
1537         dump_run(trigger);
1538 }
1539
1540 static int __init dump_reipl_init(void)
1541 {
1542         if (!diag308_set_works)
1543                 return -EOPNOTSUPP;
1544         else
1545                 return 0;
1546 }
1547
1548 static struct shutdown_action __refdata dump_reipl_action = {
1549         .name   = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1550         .fn     = dump_reipl_run,
1551         .init   = dump_reipl_init,
1552 };
1553
1554 /*
1555  * vmcmd shutdown action: Trigger vm command on shutdown.
1556  */
1557
1558 static char vmcmd_on_reboot[128];
1559 static char vmcmd_on_panic[128];
1560 static char vmcmd_on_halt[128];
1561 static char vmcmd_on_poff[128];
1562 static char vmcmd_on_restart[128];
1563
1564 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1565 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1566 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1567 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1568 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1569
1570 static struct attribute *vmcmd_attrs[] = {
1571         &sys_vmcmd_on_reboot_attr.attr,
1572         &sys_vmcmd_on_panic_attr.attr,
1573         &sys_vmcmd_on_halt_attr.attr,
1574         &sys_vmcmd_on_poff_attr.attr,
1575         &sys_vmcmd_on_restart_attr.attr,
1576         NULL,
1577 };
1578
1579 static struct attribute_group vmcmd_attr_group = {
1580         .attrs = vmcmd_attrs,
1581 };
1582
1583 static struct kset *vmcmd_kset;
1584
1585 static void vmcmd_run(struct shutdown_trigger *trigger)
1586 {
1587         char *cmd, *next_cmd;
1588
1589         if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1590                 cmd = vmcmd_on_reboot;
1591         else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1592                 cmd = vmcmd_on_panic;
1593         else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1594                 cmd = vmcmd_on_halt;
1595         else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1596                 cmd = vmcmd_on_poff;
1597         else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
1598                 cmd = vmcmd_on_restart;
1599         else
1600                 return;
1601
1602         if (strlen(cmd) == 0)
1603                 return;
1604         do {
1605                 next_cmd = strchr(cmd, '\n');
1606                 if (next_cmd) {
1607                         next_cmd[0] = 0;
1608                         next_cmd += 1;
1609                 }
1610                 __cpcmd(cmd, NULL, 0, NULL);
1611                 cmd = next_cmd;
1612         } while (cmd != NULL);
1613 }
1614
1615 static int vmcmd_init(void)
1616 {
1617         if (!MACHINE_IS_VM)
1618                 return -EOPNOTSUPP;
1619         vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1620         if (!vmcmd_kset)
1621                 return -ENOMEM;
1622         return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1623 }
1624
1625 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1626                                               vmcmd_run, vmcmd_init};
1627
1628 /*
1629  * stop shutdown action: Stop Linux on shutdown.
1630  */
1631
1632 static void stop_run(struct shutdown_trigger *trigger)
1633 {
1634         if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
1635             strcmp(trigger->name, ON_RESTART_STR) == 0)
1636                 disabled_wait((unsigned long) __builtin_return_address(0));
1637         smp_stop_cpu();
1638 }
1639
1640 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1641                                              stop_run, NULL};
1642
1643 /* action list */
1644
1645 static struct shutdown_action *shutdown_actions_list[] = {
1646         &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1647         &vmcmd_action, &stop_action};
1648 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1649
1650 /*
1651  * Trigger section
1652  */
1653
1654 static struct kset *shutdown_actions_kset;
1655
1656 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1657                        size_t len)
1658 {
1659         int i;
1660
1661         for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1662                 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1663                         if (shutdown_actions_list[i]->init_rc) {
1664                                 return shutdown_actions_list[i]->init_rc;
1665                         } else {
1666                                 trigger->action = shutdown_actions_list[i];
1667                                 return len;
1668                         }
1669                 }
1670         }
1671         return -EINVAL;
1672 }
1673
1674 /* on reipl */
1675
1676 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1677                                                     &reipl_action};
1678
1679 static ssize_t on_reboot_show(struct kobject *kobj,
1680                               struct kobj_attribute *attr, char *page)
1681 {
1682         return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1683 }
1684
1685 static ssize_t on_reboot_store(struct kobject *kobj,
1686                                struct kobj_attribute *attr,
1687                                const char *buf, size_t len)
1688 {
1689         return set_trigger(buf, &on_reboot_trigger, len);
1690 }
1691
1692 static struct kobj_attribute on_reboot_attr =
1693         __ATTR(on_reboot, 0644, on_reboot_show, on_reboot_store);
1694
1695 static void do_machine_restart(char *__unused)
1696 {
1697         smp_send_stop();
1698         on_reboot_trigger.action->fn(&on_reboot_trigger);
1699         reipl_run(NULL);
1700 }
1701 void (*_machine_restart)(char *command) = do_machine_restart;
1702
1703 /* on panic */
1704
1705 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1706
1707 static ssize_t on_panic_show(struct kobject *kobj,
1708                              struct kobj_attribute *attr, char *page)
1709 {
1710         return sprintf(page, "%s\n", on_panic_trigger.action->name);
1711 }
1712
1713 static ssize_t on_panic_store(struct kobject *kobj,
1714                               struct kobj_attribute *attr,
1715                               const char *buf, size_t len)
1716 {
1717         return set_trigger(buf, &on_panic_trigger, len);
1718 }
1719
1720 static struct kobj_attribute on_panic_attr =
1721         __ATTR(on_panic, 0644, on_panic_show, on_panic_store);
1722
1723 static void do_panic(void)
1724 {
1725         lgr_info_log();
1726         on_panic_trigger.action->fn(&on_panic_trigger);
1727         stop_run(&on_panic_trigger);
1728 }
1729
1730 /* on restart */
1731
1732 static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
1733         &stop_action};
1734
1735 static ssize_t on_restart_show(struct kobject *kobj,
1736                                struct kobj_attribute *attr, char *page)
1737 {
1738         return sprintf(page, "%s\n", on_restart_trigger.action->name);
1739 }
1740
1741 static ssize_t on_restart_store(struct kobject *kobj,
1742                                 struct kobj_attribute *attr,
1743                                 const char *buf, size_t len)
1744 {
1745         return set_trigger(buf, &on_restart_trigger, len);
1746 }
1747
1748 static struct kobj_attribute on_restart_attr =
1749         __ATTR(on_restart, 0644, on_restart_show, on_restart_store);
1750
1751 static void __do_restart(void *ignore)
1752 {
1753         smp_send_stop();
1754 #ifdef CONFIG_CRASH_DUMP
1755         crash_kexec(NULL);
1756 #endif
1757         on_restart_trigger.action->fn(&on_restart_trigger);
1758         stop_run(&on_restart_trigger);
1759 }
1760
1761 void do_restart(void)
1762 {
1763         tracing_off();
1764         debug_locks_off();
1765         lgr_info_log();
1766         smp_call_online_cpu(__do_restart, NULL);
1767 }
1768
1769 /* on halt */
1770
1771 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1772
1773 static ssize_t on_halt_show(struct kobject *kobj,
1774                             struct kobj_attribute *attr, char *page)
1775 {
1776         return sprintf(page, "%s\n", on_halt_trigger.action->name);
1777 }
1778
1779 static ssize_t on_halt_store(struct kobject *kobj,
1780                              struct kobj_attribute *attr,
1781                              const char *buf, size_t len)
1782 {
1783         return set_trigger(buf, &on_halt_trigger, len);
1784 }
1785
1786 static struct kobj_attribute on_halt_attr =
1787         __ATTR(on_halt, 0644, on_halt_show, on_halt_store);
1788
1789
1790 static void do_machine_halt(void)
1791 {
1792         smp_send_stop();
1793         on_halt_trigger.action->fn(&on_halt_trigger);
1794         stop_run(&on_halt_trigger);
1795 }
1796 void (*_machine_halt)(void) = do_machine_halt;
1797
1798 /* on power off */
1799
1800 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1801
1802 static ssize_t on_poff_show(struct kobject *kobj,
1803                             struct kobj_attribute *attr, char *page)
1804 {
1805         return sprintf(page, "%s\n", on_poff_trigger.action->name);
1806 }
1807
1808 static ssize_t on_poff_store(struct kobject *kobj,
1809                              struct kobj_attribute *attr,
1810                              const char *buf, size_t len)
1811 {
1812         return set_trigger(buf, &on_poff_trigger, len);
1813 }
1814
1815 static struct kobj_attribute on_poff_attr =
1816         __ATTR(on_poff, 0644, on_poff_show, on_poff_store);
1817
1818
1819 static void do_machine_power_off(void)
1820 {
1821         smp_send_stop();
1822         on_poff_trigger.action->fn(&on_poff_trigger);
1823         stop_run(&on_poff_trigger);
1824 }
1825 void (*_machine_power_off)(void) = do_machine_power_off;
1826
1827 static void __init shutdown_triggers_init(void)
1828 {
1829         shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1830                                                     firmware_kobj);
1831         if (!shutdown_actions_kset)
1832                 goto fail;
1833         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1834                               &on_reboot_attr.attr))
1835                 goto fail;
1836         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1837                               &on_panic_attr.attr))
1838                 goto fail;
1839         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1840                               &on_halt_attr.attr))
1841                 goto fail;
1842         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1843                               &on_poff_attr.attr))
1844                 goto fail;
1845         if (sysfs_create_file(&shutdown_actions_kset->kobj,
1846                               &on_restart_attr.attr))
1847                 goto fail;
1848         return;
1849 fail:
1850         panic("shutdown_triggers_init failed\n");
1851 }
1852
1853 static void __init shutdown_actions_init(void)
1854 {
1855         int i;
1856
1857         for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1858                 if (!shutdown_actions_list[i]->init)
1859                         continue;
1860                 shutdown_actions_list[i]->init_rc =
1861                         shutdown_actions_list[i]->init();
1862         }
1863 }
1864
1865 static int __init s390_ipl_init(void)
1866 {
1867         sclp_get_ipl_info(&sclp_ipl_info);
1868         shutdown_actions_init();
1869         shutdown_triggers_init();
1870         return 0;
1871 }
1872
1873 __initcall(s390_ipl_init);
1874
1875 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1876 {
1877         int sx, dx;
1878
1879         dx = 0;
1880         for (sx = 0; src[sx] != 0; sx++) {
1881                 if (src[sx] == '"')
1882                         continue;
1883                 dst[dx++] = src[sx];
1884                 if (dx >= n)
1885                         break;
1886         }
1887 }
1888
1889 static int __init vmcmd_on_reboot_setup(char *str)
1890 {
1891         if (!MACHINE_IS_VM)
1892                 return 1;
1893         strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1894         vmcmd_on_reboot[127] = 0;
1895         on_reboot_trigger.action = &vmcmd_action;
1896         return 1;
1897 }
1898 __setup("vmreboot=", vmcmd_on_reboot_setup);
1899
1900 static int __init vmcmd_on_panic_setup(char *str)
1901 {
1902         if (!MACHINE_IS_VM)
1903                 return 1;
1904         strncpy_skip_quote(vmcmd_on_panic, str, 127);
1905         vmcmd_on_panic[127] = 0;
1906         on_panic_trigger.action = &vmcmd_action;
1907         return 1;
1908 }
1909 __setup("vmpanic=", vmcmd_on_panic_setup);
1910
1911 static int __init vmcmd_on_halt_setup(char *str)
1912 {
1913         if (!MACHINE_IS_VM)
1914                 return 1;
1915         strncpy_skip_quote(vmcmd_on_halt, str, 127);
1916         vmcmd_on_halt[127] = 0;
1917         on_halt_trigger.action = &vmcmd_action;
1918         return 1;
1919 }
1920 __setup("vmhalt=", vmcmd_on_halt_setup);
1921
1922 static int __init vmcmd_on_poff_setup(char *str)
1923 {
1924         if (!MACHINE_IS_VM)
1925                 return 1;
1926         strncpy_skip_quote(vmcmd_on_poff, str, 127);
1927         vmcmd_on_poff[127] = 0;
1928         on_poff_trigger.action = &vmcmd_action;
1929         return 1;
1930 }
1931 __setup("vmpoff=", vmcmd_on_poff_setup);
1932
1933 static int on_panic_notify(struct notifier_block *self,
1934                            unsigned long event, void *data)
1935 {
1936         do_panic();
1937         return NOTIFY_OK;
1938 }
1939
1940 static struct notifier_block on_panic_nb = {
1941         .notifier_call = on_panic_notify,
1942         .priority = INT_MIN,
1943 };
1944
1945 void __init setup_ipl(void)
1946 {
1947         ipl_info.type = get_ipl_type();
1948         switch (ipl_info.type) {
1949         case IPL_TYPE_CCW:
1950                 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1951                 ipl_info.data.ccw.dev_id.ssid = 0;
1952                 break;
1953         case IPL_TYPE_FCP:
1954         case IPL_TYPE_FCP_DUMP:
1955                 ipl_info.data.fcp.dev_id.devno =
1956                         IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1957                 ipl_info.data.fcp.dev_id.ssid = 0;
1958                 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1959                 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1960                 break;
1961         case IPL_TYPE_NSS:
1962                 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1963                         sizeof(ipl_info.data.nss.name));
1964                 break;
1965         case IPL_TYPE_UNKNOWN:
1966                 /* We have no info to copy */
1967                 break;
1968         }
1969         atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1970 }
1971
1972 void __init ipl_update_parameters(void)
1973 {
1974         int rc;
1975
1976         rc = diag308(DIAG308_STORE, &ipl_block);
1977         if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
1978                 diag308_set_works = 1;
1979 }
1980
1981 void __init ipl_save_parameters(void)
1982 {
1983         struct cio_iplinfo iplinfo;
1984         void *src, *dst;
1985
1986         if (cio_get_iplinfo(&iplinfo))
1987                 return;
1988
1989         ipl_devno = iplinfo.devno;
1990         ipl_flags |= IPL_DEVNO_VALID;
1991         if (!iplinfo.is_qdio)
1992                 return;
1993         ipl_flags |= IPL_PARMBLOCK_VALID;
1994         src = (void *)(unsigned long)S390_lowcore.ipl_parmblock_ptr;
1995         dst = (void *)IPL_PARMBLOCK_ORIGIN;
1996         memmove(dst, src, PAGE_SIZE);
1997         S390_lowcore.ipl_parmblock_ptr = IPL_PARMBLOCK_ORIGIN;
1998 }
1999
2000 static LIST_HEAD(rcall);
2001 static DEFINE_MUTEX(rcall_mutex);
2002
2003 void register_reset_call(struct reset_call *reset)
2004 {
2005         mutex_lock(&rcall_mutex);
2006         list_add(&reset->list, &rcall);
2007         mutex_unlock(&rcall_mutex);
2008 }
2009 EXPORT_SYMBOL_GPL(register_reset_call);
2010
2011 void unregister_reset_call(struct reset_call *reset)
2012 {
2013         mutex_lock(&rcall_mutex);
2014         list_del(&reset->list);
2015         mutex_unlock(&rcall_mutex);
2016 }
2017 EXPORT_SYMBOL_GPL(unregister_reset_call);
2018
2019 static void do_reset_calls(void)
2020 {
2021         struct reset_call *reset;
2022
2023 #ifdef CONFIG_64BIT
2024         if (diag308_set_works) {
2025                 diag308_reset();
2026                 return;
2027         }
2028 #endif
2029         list_for_each_entry(reset, &rcall, list)
2030                 reset->fn();
2031 }
2032
2033 u32 dump_prefix_page;
2034
2035 void s390_reset_system(void (*func)(void *), void *data)
2036 {
2037         struct _lowcore *lc;
2038
2039         lc = (struct _lowcore *)(unsigned long) store_prefix();
2040
2041         /* Stack for interrupt/machine check handler */
2042         lc->panic_stack = S390_lowcore.panic_stack;
2043
2044         /* Save prefix page address for dump case */
2045         dump_prefix_page = (u32)(unsigned long) lc;
2046
2047         /* Disable prefixing */
2048         set_prefix(0);
2049
2050         /* Disable lowcore protection */
2051         __ctl_clear_bit(0,28);
2052
2053         /* Set new machine check handler */
2054         S390_lowcore.mcck_new_psw.mask = psw_kernel_bits | PSW_MASK_DAT;
2055         S390_lowcore.mcck_new_psw.addr =
2056                 PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;
2057
2058         /* Set new program check handler */
2059         S390_lowcore.program_new_psw.mask = psw_kernel_bits | PSW_MASK_DAT;
2060         S390_lowcore.program_new_psw.addr =
2061                 PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
2062
2063         /* Store status at absolute zero */
2064         store_status();
2065
2066         do_reset_calls();
2067         if (func)
2068                 func(data);
2069 }