arch/s390/kernel/ipl.c

   1 /*
   2  *    ipl/reipl/dump support for Linux on s390.
   3  *
   4  *    Copyright IBM Corp. 2005, 2012
   5  *    Author(s): Michael Holzheu <holzheu@de.ibm.com>
   6  *               Heiko Carstens <heiko.carstens@de.ibm.com>
   7  *               Volker Sameske <sameske@de.ibm.com>
   8  */
   9
  10 #include <linux/types.h>
  11 #include <linux/export.h>
  12 #include <linux/init.h>
  13 #include <linux/device.h>
  14 #include <linux/delay.h>
  15 #include <linux/reboot.h>
  16 #include <linux/ctype.h>
  17 #include <linux/fs.h>
  18 #include <linux/gfp.h>
  19 #include <linux/crash_dump.h>
  20 #include <linux/debug_locks.h>
  21 #include <asm/diag.h>
  22 #include <asm/ipl.h>
  23 #include <asm/smp.h>
  24 #include <asm/setup.h>
  25 #include <asm/cpcmd.h>
  26 #include <asm/cio.h>
  27 #include <asm/ebcdic.h>
  28 #include <asm/reset.h>
  29 #include <asm/sclp.h>
  30 #include <asm/checksum.h>
  31 #include <asm/debug.h>
  32 #include <asm/os_info.h>
  33 #include "entry.h"
  34
  35 #define IPL_PARM_BLOCK_VERSION 0
  36
  37 #define IPL_UNKNOWN_STR         "unknown"
  38 #define IPL_CCW_STR             "ccw"
  39 #define IPL_FCP_STR             "fcp"
  40 #define IPL_FCP_DUMP_STR        "fcp_dump"
  41 #define IPL_NSS_STR             "nss"
  42
  43 #define DUMP_CCW_STR            "ccw"
  44 #define DUMP_FCP_STR            "fcp"
  45 #define DUMP_NONE_STR           "none"
  46
  47 /*
  48  * Four shutdown trigger types are supported:
  49  * - panic
  50  * - halt
  51  * - power off
  52  * - reipl
  53  * - restart
  54  */
  55 #define ON_PANIC_STR            "on_panic"
  56 #define ON_HALT_STR             "on_halt"
  57 #define ON_POFF_STR             "on_poff"
  58 #define ON_REIPL_STR            "on_reboot"
  59 #define ON_RESTART_STR          "on_restart"
  60
  61 struct shutdown_action;
  62 struct shutdown_trigger {
  63         char *name;
  64         struct shutdown_action *action;
  65 };
  66
  67 /*
  68  * The following shutdown action types are supported:
  69  */
  70 #define SHUTDOWN_ACTION_IPL_STR         "ipl"
  71 #define SHUTDOWN_ACTION_REIPL_STR       "reipl"
  72 #define SHUTDOWN_ACTION_DUMP_STR        "dump"
  73 #define SHUTDOWN_ACTION_VMCMD_STR       "vmcmd"
  74 #define SHUTDOWN_ACTION_STOP_STR        "stop"
  75 #define SHUTDOWN_ACTION_DUMP_REIPL_STR  "dump_reipl"
  76
  77 struct shutdown_action {
  78         char *name;
  79         void (*fn) (struct shutdown_trigger *trigger);
  80         int (*init) (void);
  81         int init_rc;
  82 };
  83
  84 static char *ipl_type_str(enum ipl_type type)
  85 {
  86         switch (type) {
  87         case IPL_TYPE_CCW:
  88                 return IPL_CCW_STR;
  89         case IPL_TYPE_FCP:
  90                 return IPL_FCP_STR;
  91         case IPL_TYPE_FCP_DUMP:
  92                 return IPL_FCP_DUMP_STR;
  93         case IPL_TYPE_NSS:
  94                 return IPL_NSS_STR;
  95         case IPL_TYPE_UNKNOWN:
  96         default:
  97                 return IPL_UNKNOWN_STR;
  98         }
  99 }
 100
 101 enum dump_type {
 102         DUMP_TYPE_NONE  = 1,
 103         DUMP_TYPE_CCW   = 2,
 104         DUMP_TYPE_FCP   = 4,
 105 };
 106
 107 static char *dump_type_str(enum dump_type type)
 108 {
 109         switch (type) {
 110         case DUMP_TYPE_NONE:
 111                 return DUMP_NONE_STR;
 112         case DUMP_TYPE_CCW:
 113                 return DUMP_CCW_STR;
 114         case DUMP_TYPE_FCP:
 115                 return DUMP_FCP_STR;
 116         default:
 117                 return NULL;
 118         }
 119 }
 120
 121 /*
 122  * Must be in data section since the bss section
 123  * is not cleared when these are accessed.
 124  */
 125 static u8 ipl_ssid __section(.data) = 0;
 126 static u16 ipl_devno __section(.data) = 0;
 127 u32 ipl_flags __section(.data) = 0;
 128
 129 enum ipl_method {
 130         REIPL_METHOD_CCW_CIO,
 131         REIPL_METHOD_CCW_DIAG,
 132         REIPL_METHOD_CCW_VM,
 133         REIPL_METHOD_FCP_RO_DIAG,
 134         REIPL_METHOD_FCP_RW_DIAG,
 135         REIPL_METHOD_FCP_RO_VM,
 136         REIPL_METHOD_FCP_DUMP,
 137         REIPL_METHOD_NSS,
 138         REIPL_METHOD_NSS_DIAG,
 139         REIPL_METHOD_DEFAULT,
 140 };
 141
 142 enum dump_method {
 143         DUMP_METHOD_NONE,
 144         DUMP_METHOD_CCW_CIO,
 145         DUMP_METHOD_CCW_DIAG,
 146         DUMP_METHOD_CCW_VM,
 147         DUMP_METHOD_FCP_DIAG,
 148 };
 149
 150 static int diag308_set_works = 0;
 151
 152 static struct ipl_parameter_block ipl_block;
 153
 154 static int reipl_capabilities = IPL_TYPE_UNKNOWN;
 155
 156 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
 157 static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
 158 static struct ipl_parameter_block *reipl_block_fcp;
 159 static struct ipl_parameter_block *reipl_block_ccw;
 160 static struct ipl_parameter_block *reipl_block_nss;
 161 static struct ipl_parameter_block *reipl_block_actual;
 162
 163 static int dump_capabilities = DUMP_TYPE_NONE;
 164 static enum dump_type dump_type = DUMP_TYPE_NONE;
 165 static enum dump_method dump_method = DUMP_METHOD_NONE;
 166 static struct ipl_parameter_block *dump_block_fcp;
 167 static struct ipl_parameter_block *dump_block_ccw;
 168
 169 static struct sclp_ipl_info sclp_ipl_info;
 170
 171 static inline int __diag308(unsigned long subcode, void *addr)
 172 {
 173         register unsigned long _addr asm("0") = (unsigned long) addr;
 174         register unsigned long _rc asm("1") = 0;
 175
 176         asm volatile(
 177                 "       diag    %0,%2,0x308\n"
 178                 "0:     nopr    %%r7\n"
 179                 EX_TABLE(0b,0b)
 180                 : "+d" (_addr), "+d" (_rc)
 181                 : "d" (subcode) : "cc", "memory");
 182         return _rc;
 183 }
 184
 185 int diag308(unsigned long subcode, void *addr)
 186 {
 187         diag_stat_inc(DIAG_STAT_X308);
 188         return __diag308(subcode, addr);
 189 }
 190 EXPORT_SYMBOL_GPL(diag308);
 191
 192 /* SYSFS */
 193
 194 #define IPL_ATTR_SHOW_FN(_prefix, _name, _format, args...)              \
 195 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,     \
 196                 struct kobj_attribute *attr,                            \
 197                 char *page)                                             \
 198 {                                                                       \
 199         return snprintf(page, PAGE_SIZE, _format, ##args);              \
 200 }
 201
 202 #define IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk)                 \
 203 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,    \
 204                 struct kobj_attribute *attr,                            \
 205                 const char *buf, size_t len)                            \
 206 {                                                                       \
 207         unsigned long long ssid, devno;                                 \
 208                                                                         \
 209         if (sscanf(buf, "0.%llx.%llx\n", &ssid, &devno) != 2)           \
 210                 return -EINVAL;                                         \
 211                                                                         \
 212         if (ssid > __MAX_SSID || devno > __MAX_SUBCHANNEL)              \
 213                 return -EINVAL;                                         \
 214                                                                         \
 215         _ipl_blk.ssid = ssid;                                           \
 216         _ipl_blk.devno = devno;                                         \
 217         return len;                                                     \
 218 }
 219
 220 #define DEFINE_IPL_CCW_ATTR_RW(_prefix, _name, _ipl_blk)                \
 221 IPL_ATTR_SHOW_FN(_prefix, _name, "0.%x.%04x\n",                         \
 222                  _ipl_blk.ssid, _ipl_blk.devno);                        \
 223 IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk);                        \
 224 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 225         __ATTR(_name, (S_IRUGO | S_IWUSR),                              \
 226                sys_##_prefix##_##_name##_show,                          \
 227                sys_##_prefix##_##_name##_store)                         \
 228
 229 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value)             \
 230 IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value)                       \
 231 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 232         __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL)
 233
 234 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)   \
 235 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value) \
 236 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,    \
 237                 struct kobj_attribute *attr,                            \
 238                 const char *buf, size_t len)                            \
 239 {                                                                       \
 240         unsigned long long value;                                       \
 241         if (sscanf(buf, _fmt_in, &value) != 1)                          \
 242                 return -EINVAL;                                         \
 243         _value = value;                                                 \
 244         return len;                                                     \
 245 }                                                                       \
 246 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 247         __ATTR(_name,(S_IRUGO | S_IWUSR),                               \
 248                         sys_##_prefix##_##_name##_show,                 \
 249                         sys_##_prefix##_##_name##_store)
 250
 251 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
 252 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, _value)                      \
 253 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,    \
 254                 struct kobj_attribute *attr,                            \
 255                 const char *buf, size_t len)                            \
 256 {                                                                       \
 257         strncpy(_value, buf, sizeof(_value) - 1);                       \
 258         strim(_value);                                                  \
 259         return len;                                                     \
 260 }                                                                       \
 261 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 262         __ATTR(_name,(S_IRUGO | S_IWUSR),                               \
 263                         sys_##_prefix##_##_name##_show,                 \
 264                         sys_##_prefix##_##_name##_store)
 265
 266 static void make_attrs_ro(struct attribute **attrs)
 267 {
 268         while (*attrs) {
 269                 (*attrs)->mode = S_IRUGO;
 270                 attrs++;
 271         }
 272 }
 273
 274 /*
 275  * ipl section
 276  */
 277
 278 static __init enum ipl_type get_ipl_type(void)
 279 {
 280         struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
 281
 282         if (ipl_flags & IPL_NSS_VALID)
 283                 return IPL_TYPE_NSS;
 284         if (!(ipl_flags & IPL_DEVNO_VALID))
 285                 return IPL_TYPE_UNKNOWN;
 286         if (!(ipl_flags & IPL_PARMBLOCK_VALID))
 287                 return IPL_TYPE_CCW;
 288         if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
 289                 return IPL_TYPE_UNKNOWN;
 290         if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
 291                 return IPL_TYPE_UNKNOWN;
 292         if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
 293                 return IPL_TYPE_FCP_DUMP;
 294         return IPL_TYPE_FCP;
 295 }
 296
 297 struct ipl_info ipl_info;
 298 EXPORT_SYMBOL_GPL(ipl_info);
 299
 300 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
 301                              char *page)
 302 {
 303         return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
 304 }
 305
 306 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
 307
 308 /* VM IPL PARM routines */
 309 static size_t reipl_get_ascii_vmparm(char *dest, size_t size,
 310                                      const struct ipl_parameter_block *ipb)
 311 {
 312         int i;
 313         size_t len;
 314         char has_lowercase = 0;
 315
 316         len = 0;
 317         if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
 318             (ipb->ipl_info.ccw.vm_parm_len > 0)) {
 319
 320                 len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
 321                 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
 322                 /* If at least one character is lowercase, we assume mixed
 323                  * case; otherwise we convert everything to lowercase.
 324                  */
 325                 for (i = 0; i < len; i++)
 326                         if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
 327                             (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
 328                             (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
 329                                 has_lowercase = 1;
 330                                 break;
 331                         }
 332                 if (!has_lowercase)
 333                         EBC_TOLOWER(dest, len);
 334                 EBCASC(dest, len);
 335         }
 336         dest[len] = 0;
 337
 338         return len;
 339 }
 340
 341 size_t append_ipl_vmparm(char *dest, size_t size)
 342 {
 343         size_t rc;
 344
 345         rc = 0;
 346         if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
 347                 rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
 348         else
 349                 dest[0] = 0;
 350         return rc;
 351 }
 352
 353 static ssize_t ipl_vm_parm_show(struct kobject *kobj,
 354                                 struct kobj_attribute *attr, char *page)
 355 {
 356         char parm[DIAG308_VMPARM_SIZE + 1] = {};
 357
 358         append_ipl_vmparm(parm, sizeof(parm));
 359         return sprintf(page, "%s\n", parm);
 360 }
 361
 362 static size_t scpdata_length(const char* buf, size_t count)
 363 {
 364         while (count) {
 365                 if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
 366                         break;
 367                 count--;
 368         }
 369         return count;
 370 }
 371
 372 static size_t reipl_append_ascii_scpdata(char *dest, size_t size,
 373                                          const struct ipl_parameter_block *ipb)
 374 {
 375         size_t count;
 376         size_t i;
 377         int has_lowercase;
 378
 379         count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data,
 380                                              ipb->ipl_info.fcp.scp_data_len));
 381         if (!count)
 382                 goto out;
 383
 384         has_lowercase = 0;
 385         for (i = 0; i < count; i++) {
 386                 if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
 387                         count = 0;
 388                         goto out;
 389                 }
 390                 if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
 391                         has_lowercase = 1;
 392         }
 393
 394         if (has_lowercase)
 395                 memcpy(dest, ipb->ipl_info.fcp.scp_data, count);
 396         else
 397                 for (i = 0; i < count; i++)
 398                         dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]);
 399 out:
 400         dest[count] = '\0';
 401         return count;
 402 }
 403
 404 size_t append_ipl_scpdata(char *dest, size_t len)
 405 {
 406         size_t rc;
 407
 408         rc = 0;
 409         if (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP)
 410                 rc = reipl_append_ascii_scpdata(dest, len, &ipl_block);
 411         else
 412                 dest[0] = 0;
 413         return rc;
 414 }
 415
 416
 417 static struct kobj_attribute sys_ipl_vm_parm_attr =
 418         __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
 419
 420 static ssize_t sys_ipl_device_show(struct kobject *kobj,
 421                                    struct kobj_attribute *attr, char *page)
 422 {
 423         struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
 424
 425         switch (ipl_info.type) {
 426         case IPL_TYPE_CCW:
 427                 return sprintf(page, "0.%x.%04x\n", ipl_ssid, ipl_devno);
 428         case IPL_TYPE_FCP:
 429         case IPL_TYPE_FCP_DUMP:
 430                 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
 431         default:
 432                 return 0;
 433         }
 434 }
 435
 436 static struct kobj_attribute sys_ipl_device_attr =
 437         __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
 438
 439 static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
 440                                   struct bin_attribute *attr, char *buf,
 441                                   loff_t off, size_t count)
 442 {
 443         return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START,
 444                                         IPL_PARMBLOCK_SIZE);
 445 }
 446 static struct bin_attribute ipl_parameter_attr =
 447         __BIN_ATTR(binary_parameter, S_IRUGO, ipl_parameter_read, NULL,
 448                    PAGE_SIZE);
 449
 450 static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
 451                                  struct bin_attribute *attr, char *buf,
 452                                  loff_t off, size_t count)
 453 {
 454         unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
 455         void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
 456
 457         return memory_read_from_buffer(buf, count, &off, scp_data, size);
 458 }
 459 static struct bin_attribute ipl_scp_data_attr =
 460         __BIN_ATTR(scp_data, S_IRUGO, ipl_scp_data_read, NULL, PAGE_SIZE);
 461
 462 static struct bin_attribute *ipl_fcp_bin_attrs[] = {
 463         &ipl_parameter_attr,
 464         &ipl_scp_data_attr,
 465         NULL,
 466 };
 467
 468 /* FCP ipl device attributes */
 469
 470 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
 471                    IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
 472 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
 473                    IPL_PARMBLOCK_START->ipl_info.fcp.lun);
 474 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
 475                    IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
 476 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
 477                    IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
 478
 479 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
 480                                      struct kobj_attribute *attr, char *page)
 481 {
 482         char loadparm[LOADPARM_LEN + 1] = {};
 483
 484         if (!sclp_ipl_info.is_valid)
 485                 return sprintf(page, "#unknown#\n");
 486         memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
 487         EBCASC(loadparm, LOADPARM_LEN);
 488         strim(loadparm);
 489         return sprintf(page, "%s\n", loadparm);
 490 }
 491
 492 static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
 493         __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
 494
 495 static struct attribute *ipl_fcp_attrs[] = {
 496         &sys_ipl_type_attr.attr,
 497         &sys_ipl_device_attr.attr,
 498         &sys_ipl_fcp_wwpn_attr.attr,
 499         &sys_ipl_fcp_lun_attr.attr,
 500         &sys_ipl_fcp_bootprog_attr.attr,
 501         &sys_ipl_fcp_br_lba_attr.attr,
 502         &sys_ipl_ccw_loadparm_attr.attr,
 503         NULL,
 504 };
 505
 506 static struct attribute_group ipl_fcp_attr_group = {
 507         .attrs = ipl_fcp_attrs,
 508         .bin_attrs = ipl_fcp_bin_attrs,
 509 };
 510
 511 /* CCW ipl device attributes */
 512
 513 static struct attribute *ipl_ccw_attrs_vm[] = {
 514         &sys_ipl_type_attr.attr,
 515         &sys_ipl_device_attr.attr,
 516         &sys_ipl_ccw_loadparm_attr.attr,
 517         &sys_ipl_vm_parm_attr.attr,
 518         NULL,
 519 };
 520
 521 static struct attribute *ipl_ccw_attrs_lpar[] = {
 522         &sys_ipl_type_attr.attr,
 523         &sys_ipl_device_attr.attr,
 524         &sys_ipl_ccw_loadparm_attr.attr,
 525         NULL,
 526 };
 527
 528 static struct attribute_group ipl_ccw_attr_group_vm = {
 529         .attrs = ipl_ccw_attrs_vm,
 530 };
 531
 532 static struct attribute_group ipl_ccw_attr_group_lpar = {
 533         .attrs = ipl_ccw_attrs_lpar
 534 };
 535
 536 /* NSS ipl device attributes */
 537
 538 DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
 539
 540 static struct attribute *ipl_nss_attrs[] = {
 541         &sys_ipl_type_attr.attr,
 542         &sys_ipl_nss_name_attr.attr,
 543         &sys_ipl_ccw_loadparm_attr.attr,
 544         &sys_ipl_vm_parm_attr.attr,
 545         NULL,
 546 };
 547
 548 static struct attribute_group ipl_nss_attr_group = {
 549         .attrs = ipl_nss_attrs,
 550 };
 551
 552 /* UNKNOWN ipl device attributes */
 553
 554 static struct attribute *ipl_unknown_attrs[] = {
 555         &sys_ipl_type_attr.attr,
 556         NULL,
 557 };
 558
 559 static struct attribute_group ipl_unknown_attr_group = {
 560         .attrs = ipl_unknown_attrs,
 561 };
 562
 563 static struct kset *ipl_kset;
 564
 565 static void __ipl_run(void *unused)
 566 {
 567         diag308(DIAG308_LOAD_CLEAR, 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 = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
 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 scpdata_len = count;
 720         size_t padding;
 721
 722
 723         if (off)
 724                 return -EINVAL;
 725
 726         memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf, count);
 727         if (scpdata_len % 8) {
 728                 padding = 8 - (scpdata_len % 8);
 729                 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
 730                        0, padding);
 731                 scpdata_len += padding;
 732         }
 733
 734         reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
 735         reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
 736         reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
 737
 738         return count;
 739 }
 740 static struct bin_attribute sys_reipl_fcp_scp_data_attr =
 741         __BIN_ATTR(scp_data, (S_IRUGO | S_IWUSR), reipl_fcp_scpdata_read,
 742                    reipl_fcp_scpdata_write, DIAG308_SCPDATA_SIZE);
 743
 744 static struct bin_attribute *reipl_fcp_bin_attrs[] = {
 745         &sys_reipl_fcp_scp_data_attr,
 746         NULL,
 747 };
 748
 749 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n",
 750                    reipl_block_fcp->ipl_info.fcp.wwpn);
 751 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n",
 752                    reipl_block_fcp->ipl_info.fcp.lun);
 753 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
 754                    reipl_block_fcp->ipl_info.fcp.bootprog);
 755 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
 756                    reipl_block_fcp->ipl_info.fcp.br_lba);
 757 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
 758                    reipl_block_fcp->ipl_info.fcp.devno);
 759
 760 static void reipl_get_ascii_loadparm(char *loadparm,
 761                                      struct ipl_parameter_block *ibp)
 762 {
 763         memcpy(loadparm, ibp->hdr.loadparm, LOADPARM_LEN);
 764         EBCASC(loadparm, LOADPARM_LEN);
 765         loadparm[LOADPARM_LEN] = 0;
 766         strim(loadparm);
 767 }
 768
 769 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
 770                                            char *page)
 771 {
 772         char buf[LOADPARM_LEN + 1];
 773
 774         reipl_get_ascii_loadparm(buf, ipb);
 775         return sprintf(page, "%s\n", buf);
 776 }
 777
 778 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
 779                                             const char *buf, size_t len)
 780 {
 781         int i, lp_len;
 782
 783         /* ignore trailing newline */
 784         lp_len = len;
 785         if ((len > 0) && (buf[len - 1] == '\n'))
 786                 lp_len--;
 787         /* loadparm can have max 8 characters and must not start with a blank */
 788         if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
 789                 return -EINVAL;
 790         /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
 791         for (i = 0; i < lp_len; i++) {
 792                 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
 793                     (buf[i] == '.'))
 794                         continue;
 795                 return -EINVAL;
 796         }
 797         /* initialize loadparm with blanks */
 798         memset(ipb->hdr.loadparm, ' ', LOADPARM_LEN);
 799         /* copy and convert to ebcdic */
 800         memcpy(ipb->hdr.loadparm, buf, lp_len);
 801         ASCEBC(ipb->hdr.loadparm, LOADPARM_LEN);
 802         return len;
 803 }
 804
 805 /* FCP wrapper */
 806 static ssize_t reipl_fcp_loadparm_show(struct kobject *kobj,
 807                                        struct kobj_attribute *attr, char *page)
 808 {
 809         return reipl_generic_loadparm_show(reipl_block_fcp, page);
 810 }
 811
 812 static ssize_t reipl_fcp_loadparm_store(struct kobject *kobj,
 813                                         struct kobj_attribute *attr,
 814                                         const char *buf, size_t len)
 815 {
 816         return reipl_generic_loadparm_store(reipl_block_fcp, buf, len);
 817 }
 818
 819 static struct kobj_attribute sys_reipl_fcp_loadparm_attr =
 820         __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_fcp_loadparm_show,
 821                                             reipl_fcp_loadparm_store);
 822
 823 static struct attribute *reipl_fcp_attrs[] = {
 824         &sys_reipl_fcp_device_attr.attr,
 825         &sys_reipl_fcp_wwpn_attr.attr,
 826         &sys_reipl_fcp_lun_attr.attr,
 827         &sys_reipl_fcp_bootprog_attr.attr,
 828         &sys_reipl_fcp_br_lba_attr.attr,
 829         &sys_reipl_fcp_loadparm_attr.attr,
 830         NULL,
 831 };
 832
 833 static struct attribute_group reipl_fcp_attr_group = {
 834         .attrs = reipl_fcp_attrs,
 835         .bin_attrs = reipl_fcp_bin_attrs,
 836 };
 837
 838 /* CCW reipl device attributes */
 839 DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ipl_info.ccw);
 840
 841 /* NSS wrapper */
 842 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
 843                                        struct kobj_attribute *attr, char *page)
 844 {
 845         return reipl_generic_loadparm_show(reipl_block_nss, page);
 846 }
 847
 848 static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
 849                                         struct kobj_attribute *attr,
 850                                         const char *buf, size_t len)
 851 {
 852         return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
 853 }
 854
 855 /* CCW wrapper */
 856 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
 857                                        struct kobj_attribute *attr, char *page)
 858 {
 859         return reipl_generic_loadparm_show(reipl_block_ccw, page);
 860 }
 861
 862 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
 863                                         struct kobj_attribute *attr,
 864                                         const char *buf, size_t len)
 865 {
 866         return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
 867 }
 868
 869 static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
 870         __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
 871                                             reipl_ccw_loadparm_store);
 872
 873 static struct attribute *reipl_ccw_attrs_vm[] = {
 874         &sys_reipl_ccw_device_attr.attr,
 875         &sys_reipl_ccw_loadparm_attr.attr,
 876         &sys_reipl_ccw_vmparm_attr.attr,
 877         NULL,
 878 };
 879
 880 static struct attribute *reipl_ccw_attrs_lpar[] = {
 881         &sys_reipl_ccw_device_attr.attr,
 882         &sys_reipl_ccw_loadparm_attr.attr,
 883         NULL,
 884 };
 885
 886 static struct attribute_group reipl_ccw_attr_group_vm = {
 887         .name  = IPL_CCW_STR,
 888         .attrs = reipl_ccw_attrs_vm,
 889 };
 890
 891 static struct attribute_group reipl_ccw_attr_group_lpar = {
 892         .name  = IPL_CCW_STR,
 893         .attrs = reipl_ccw_attrs_lpar,
 894 };
 895
 896
 897 /* NSS reipl device attributes */
 898 static void reipl_get_ascii_nss_name(char *dst,
 899                                      struct ipl_parameter_block *ipb)
 900 {
 901         memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
 902         EBCASC(dst, NSS_NAME_SIZE);
 903         dst[NSS_NAME_SIZE] = 0;
 904 }
 905
 906 static ssize_t reipl_nss_name_show(struct kobject *kobj,
 907                                    struct kobj_attribute *attr, char *page)
 908 {
 909         char nss_name[NSS_NAME_SIZE + 1] = {};
 910
 911         reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
 912         return sprintf(page, "%s\n", nss_name);
 913 }
 914
 915 static ssize_t reipl_nss_name_store(struct kobject *kobj,
 916                                     struct kobj_attribute *attr,
 917                                     const char *buf, size_t len)
 918 {
 919         int nss_len;
 920
 921         /* ignore trailing newline */
 922         nss_len = len;
 923         if ((len > 0) && (buf[len - 1] == '\n'))
 924                 nss_len--;
 925
 926         if (nss_len > NSS_NAME_SIZE)
 927                 return -EINVAL;
 928
 929         memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
 930         if (nss_len > 0) {
 931                 reipl_block_nss->ipl_info.ccw.vm_flags |=
 932                         DIAG308_VM_FLAGS_NSS_VALID;
 933                 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
 934                 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
 935                 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
 936         } else {
 937                 reipl_block_nss->ipl_info.ccw.vm_flags &=
 938                         ~DIAG308_VM_FLAGS_NSS_VALID;
 939         }
 940
 941         return len;
 942 }
 943
 944 static struct kobj_attribute sys_reipl_nss_name_attr =
 945         __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
 946                                         reipl_nss_name_store);
 947
 948 static struct kobj_attribute sys_reipl_nss_loadparm_attr =
 949         __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
 950                                             reipl_nss_loadparm_store);
 951
 952 static struct attribute *reipl_nss_attrs[] = {
 953         &sys_reipl_nss_name_attr.attr,
 954         &sys_reipl_nss_loadparm_attr.attr,
 955         &sys_reipl_nss_vmparm_attr.attr,
 956         NULL,
 957 };
 958
 959 static struct attribute_group reipl_nss_attr_group = {
 960         .name  = IPL_NSS_STR,
 961         .attrs = reipl_nss_attrs,
 962 };
 963
 964 static void set_reipl_block_actual(struct ipl_parameter_block *reipl_block)
 965 {
 966         reipl_block_actual = reipl_block;
 967         os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual,
 968                           reipl_block->hdr.len);
 969 }
 970
 971 /* reipl type */
 972
 973 static int reipl_set_type(enum ipl_type type)
 974 {
 975         if (!(reipl_capabilities & type))
 976                 return -EINVAL;
 977
 978         switch(type) {
 979         case IPL_TYPE_CCW:
 980                 if (diag308_set_works)
 981                         reipl_method = REIPL_METHOD_CCW_DIAG;
 982                 else if (MACHINE_IS_VM)
 983                         reipl_method = REIPL_METHOD_CCW_VM;
 984                 else
 985                         reipl_method = REIPL_METHOD_CCW_CIO;
 986                 set_reipl_block_actual(reipl_block_ccw);
 987                 break;
 988         case IPL_TYPE_FCP:
 989                 if (diag308_set_works)
 990                         reipl_method = REIPL_METHOD_FCP_RW_DIAG;
 991                 else if (MACHINE_IS_VM)
 992                         reipl_method = REIPL_METHOD_FCP_RO_VM;
 993                 else
 994                         reipl_method = REIPL_METHOD_FCP_RO_DIAG;
 995                 set_reipl_block_actual(reipl_block_fcp);
 996                 break;
 997         case IPL_TYPE_FCP_DUMP:
 998                 reipl_method = REIPL_METHOD_FCP_DUMP;
 999                 break;
1000         case IPL_TYPE_NSS:
1001                 if (diag308_set_works)
1002                         reipl_method = REIPL_METHOD_NSS_DIAG;
1003                 else
1004                         reipl_method = REIPL_METHOD_NSS;
1005                 set_reipl_block_actual(reipl_block_nss);
1006                 break;
1007         case IPL_TYPE_UNKNOWN:
1008                 reipl_method = REIPL_METHOD_DEFAULT;
1009                 break;
1010         default:
1011                 BUG();
1012         }
1013         reipl_type = type;
1014         return 0;
1015 }
1016
1017 static ssize_t reipl_type_show(struct kobject *kobj,
1018                                struct kobj_attribute *attr, char *page)
1019 {
1020         return sprintf(page, "%s\n", ipl_type_str(reipl_type));
1021 }
1022
1023 static ssize_t reipl_type_store(struct kobject *kobj,
1024                                 struct kobj_attribute *attr,
1025                                 const char *buf, size_t len)
1026 {
1027         int rc = -EINVAL;
1028
1029         if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1030                 rc = reipl_set_type(IPL_TYPE_CCW);
1031         else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1032                 rc = reipl_set_type(IPL_TYPE_FCP);
1033         else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1034                 rc = reipl_set_type(IPL_TYPE_NSS);
1035         return (rc != 0) ? rc : len;
1036 }
1037
1038 static struct kobj_attribute reipl_type_attr =
1039         __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
1040
1041 static struct kset *reipl_kset;
1042 static struct kset *reipl_fcp_kset;
1043
1044 static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
1045                            const enum ipl_method m)
1046 {
1047         char loadparm[LOADPARM_LEN + 1] = {};
1048         char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
1049         char nss_name[NSS_NAME_SIZE + 1] = {};
1050         size_t pos = 0;
1051
1052         reipl_get_ascii_loadparm(loadparm, ipb);
1053         reipl_get_ascii_nss_name(nss_name, ipb);
1054         reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
1055
1056         switch (m) {
1057         case REIPL_METHOD_CCW_VM:
1058                 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
1059                 break;
1060         case REIPL_METHOD_NSS:
1061                 pos = sprintf(dst, "IPL %s", nss_name);
1062                 break;
1063         default:
1064                 break;
1065         }
1066         if (strlen(loadparm) > 0)
1067                 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
1068         if (strlen(vmparm) > 0)
1069                 sprintf(dst + pos, " PARM %s", vmparm);
1070 }
1071
1072 static void __reipl_run(void *unused)
1073 {
1074         struct ccw_dev_id devid;
1075         static char buf[128];
1076
1077         switch (reipl_method) {
1078         case REIPL_METHOD_CCW_CIO:
1079                 devid.ssid  = reipl_block_ccw->ipl_info.ccw.ssid;
1080                 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
1081                 reipl_ccw_dev(&devid);
1082                 break;
1083         case REIPL_METHOD_CCW_VM:
1084                 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
1085                 __cpcmd(buf, NULL, 0, NULL);
1086                 break;
1087         case REIPL_METHOD_CCW_DIAG:
1088                 diag308(DIAG308_SET, reipl_block_ccw);
1089                 if (MACHINE_IS_LPAR)
1090                         diag308(DIAG308_LOAD_NORMAL_DUMP, NULL);
1091                 else
1092                         diag308(DIAG308_LOAD_CLEAR, NULL);
1093                 break;
1094         case REIPL_METHOD_FCP_RW_DIAG:
1095                 diag308(DIAG308_SET, reipl_block_fcp);
1096                 diag308(DIAG308_LOAD_CLEAR, NULL);
1097                 break;
1098         case REIPL_METHOD_FCP_RO_DIAG:
1099                 diag308(DIAG308_LOAD_CLEAR, NULL);
1100                 break;
1101         case REIPL_METHOD_FCP_RO_VM:
1102                 __cpcmd("IPL", NULL, 0, NULL);
1103                 break;
1104         case REIPL_METHOD_NSS_DIAG:
1105                 diag308(DIAG308_SET, reipl_block_nss);
1106                 diag308(DIAG308_LOAD_CLEAR, NULL);
1107                 break;
1108         case REIPL_METHOD_NSS:
1109                 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
1110                 __cpcmd(buf, NULL, 0, NULL);
1111                 break;
1112         case REIPL_METHOD_DEFAULT:
1113                 if (MACHINE_IS_VM)
1114                         __cpcmd("IPL", NULL, 0, NULL);
1115                 diag308(DIAG308_LOAD_CLEAR, NULL);
1116                 break;
1117         case REIPL_METHOD_FCP_DUMP:
1118                 break;
1119         }
1120         disabled_wait((unsigned long) __builtin_return_address(0));
1121 }
1122
1123 static void reipl_run(struct shutdown_trigger *trigger)
1124 {
1125         smp_call_ipl_cpu(__reipl_run, NULL);
1126 }
1127
1128 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
1129 {
1130         ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
1131         ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1132         ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1133         ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1134 }
1135
1136 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1137 {
1138         /* LOADPARM */
1139         /* check if read scp info worked and set loadparm */
1140         if (sclp_ipl_info.is_valid)
1141                 memcpy(ipb->hdr.loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
1142         else
1143                 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1144                 memset(ipb->hdr.loadparm, 0x40, LOADPARM_LEN);
1145         ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
1146
1147         /* VM PARM */
1148         if (MACHINE_IS_VM && diag308_set_works &&
1149             (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1150
1151                 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1152                 ipb->ipl_info.ccw.vm_parm_len =
1153                                         ipl_block.ipl_info.ccw.vm_parm_len;
1154                 memcpy(ipb->ipl_info.ccw.vm_parm,
1155                        ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1156         }
1157 }
1158
1159 static int __init reipl_nss_init(void)
1160 {
1161         int rc;
1162
1163         if (!MACHINE_IS_VM)
1164                 return 0;
1165
1166         reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1167         if (!reipl_block_nss)
1168                 return -ENOMEM;
1169
1170         if (!diag308_set_works)
1171                 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO;
1172
1173         rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1174         if (rc)
1175                 return rc;
1176
1177         reipl_block_ccw_init(reipl_block_nss);
1178         if (ipl_info.type == IPL_TYPE_NSS) {
1179                 memset(reipl_block_nss->ipl_info.ccw.nss_name,
1180                         ' ', NSS_NAME_SIZE);
1181                 memcpy(reipl_block_nss->ipl_info.ccw.nss_name,
1182                         kernel_nss_name, strlen(kernel_nss_name));
1183                 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
1184                 reipl_block_nss->ipl_info.ccw.vm_flags |=
1185                         DIAG308_VM_FLAGS_NSS_VALID;
1186
1187                 reipl_block_ccw_fill_parms(reipl_block_nss);
1188         }
1189
1190         reipl_capabilities |= IPL_TYPE_NSS;
1191         return 0;
1192 }
1193
1194 static int __init reipl_ccw_init(void)
1195 {
1196         int rc;
1197
1198         reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1199         if (!reipl_block_ccw)
1200                 return -ENOMEM;
1201
1202         if (MACHINE_IS_VM) {
1203                 if (!diag308_set_works)
1204                         sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
1205                 rc = sysfs_create_group(&reipl_kset->kobj,
1206                                         &reipl_ccw_attr_group_vm);
1207         } else {
1208                 if(!diag308_set_works)
1209                         sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
1210                 rc = sysfs_create_group(&reipl_kset->kobj,
1211                                         &reipl_ccw_attr_group_lpar);
1212         }
1213         if (rc)
1214                 return rc;
1215
1216         reipl_block_ccw_init(reipl_block_ccw);
1217         if (ipl_info.type == IPL_TYPE_CCW) {
1218                 reipl_block_ccw->ipl_info.ccw.ssid = ipl_ssid;
1219                 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
1220                 reipl_block_ccw_fill_parms(reipl_block_ccw);
1221         }
1222
1223         reipl_capabilities |= IPL_TYPE_CCW;
1224         return 0;
1225 }
1226
1227 static int __init reipl_fcp_init(void)
1228 {
1229         int rc;
1230
1231         if (!diag308_set_works) {
1232                 if (ipl_info.type == IPL_TYPE_FCP) {
1233                         make_attrs_ro(reipl_fcp_attrs);
1234                         sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO;
1235                 } else
1236                         return 0;
1237         }
1238
1239         reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1240         if (!reipl_block_fcp)
1241                 return -ENOMEM;
1242
1243         /* sysfs: create fcp kset for mixing attr group and bin attrs */
1244         reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1245                                              &reipl_kset->kobj);
1246         if (!reipl_fcp_kset) {
1247                 free_page((unsigned long) reipl_block_fcp);
1248                 return -ENOMEM;
1249         }
1250
1251         rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1252         if (rc) {
1253                 kset_unregister(reipl_fcp_kset);
1254                 free_page((unsigned long) reipl_block_fcp);
1255                 return rc;
1256         }
1257
1258         if (ipl_info.type == IPL_TYPE_FCP) {
1259                 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
1260                 /*
1261                  * Fix loadparm: There are systems where the (SCSI) LOADPARM
1262                  * is invalid in the SCSI IPL parameter block, so take it
1263                  * always from sclp_ipl_info.
1264                  */
1265                 memcpy(reipl_block_fcp->hdr.loadparm, sclp_ipl_info.loadparm,
1266                        LOADPARM_LEN);
1267         } else {
1268                 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1269                 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1270                 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1271                 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1272                 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1273         }
1274         reipl_capabilities |= IPL_TYPE_FCP;
1275         return 0;
1276 }
1277
1278 static int __init reipl_type_init(void)
1279 {
1280         enum ipl_type reipl_type = ipl_info.type;
1281         struct ipl_parameter_block *reipl_block;
1282         unsigned long size;
1283
1284         reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size);
1285         if (!reipl_block)
1286                 goto out;
1287         /*
1288          * If we have an OS info reipl block, this will be used
1289          */
1290         if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_FCP) {
1291                 memcpy(reipl_block_fcp, reipl_block, size);
1292                 reipl_type = IPL_TYPE_FCP;
1293         } else if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_CCW) {
1294                 memcpy(reipl_block_ccw, reipl_block, size);
1295                 reipl_type = IPL_TYPE_CCW;
1296         }
1297 out:
1298         return reipl_set_type(reipl_type);
1299 }
1300
1301 static int __init reipl_init(void)
1302 {
1303         int rc;
1304
1305         reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1306         if (!reipl_kset)
1307                 return -ENOMEM;
1308         rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1309         if (rc) {
1310                 kset_unregister(reipl_kset);
1311                 return rc;
1312         }
1313         rc = reipl_ccw_init();
1314         if (rc)
1315                 return rc;
1316         rc = reipl_fcp_init();
1317         if (rc)
1318                 return rc;
1319         rc = reipl_nss_init();
1320         if (rc)
1321                 return rc;
1322         return reipl_type_init();
1323 }
1324
1325 static struct shutdown_action __refdata reipl_action = {
1326         .name   = SHUTDOWN_ACTION_REIPL_STR,
1327         .fn     = reipl_run,
1328         .init   = reipl_init,
1329 };
1330
1331 /*
1332  * dump shutdown action: Dump Linux on shutdown.
1333  */
1334
1335 /* FCP dump device attributes */
1336
1337 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n",
1338                    dump_block_fcp->ipl_info.fcp.wwpn);
1339 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n",
1340                    dump_block_fcp->ipl_info.fcp.lun);
1341 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1342                    dump_block_fcp->ipl_info.fcp.bootprog);
1343 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1344                    dump_block_fcp->ipl_info.fcp.br_lba);
1345 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1346                    dump_block_fcp->ipl_info.fcp.devno);
1347
1348 static struct attribute *dump_fcp_attrs[] = {
1349         &sys_dump_fcp_device_attr.attr,
1350         &sys_dump_fcp_wwpn_attr.attr,
1351         &sys_dump_fcp_lun_attr.attr,
1352         &sys_dump_fcp_bootprog_attr.attr,
1353         &sys_dump_fcp_br_lba_attr.attr,
1354         NULL,
1355 };
1356
1357 static struct attribute_group dump_fcp_attr_group = {
1358         .name  = IPL_FCP_STR,
1359         .attrs = dump_fcp_attrs,
1360 };
1361
1362 /* CCW dump device attributes */
1363 DEFINE_IPL_CCW_ATTR_RW(dump_ccw, device, dump_block_ccw->ipl_info.ccw);
1364
1365 static struct attribute *dump_ccw_attrs[] = {
1366         &sys_dump_ccw_device_attr.attr,
1367         NULL,
1368 };
1369
1370 static struct attribute_group dump_ccw_attr_group = {
1371         .name  = IPL_CCW_STR,
1372         .attrs = dump_ccw_attrs,
1373 };
1374
1375 /* dump type */
1376
1377 static int dump_set_type(enum dump_type type)
1378 {
1379         if (!(dump_capabilities & type))
1380                 return -EINVAL;
1381         switch (type) {
1382         case DUMP_TYPE_CCW:
1383                 if (diag308_set_works)
1384                         dump_method = DUMP_METHOD_CCW_DIAG;
1385                 else if (MACHINE_IS_VM)
1386                         dump_method = DUMP_METHOD_CCW_VM;
1387                 else
1388                         dump_method = DUMP_METHOD_CCW_CIO;
1389                 break;
1390         case DUMP_TYPE_FCP:
1391                 dump_method = DUMP_METHOD_FCP_DIAG;
1392                 break;
1393         default:
1394                 dump_method = DUMP_METHOD_NONE;
1395         }
1396         dump_type = type;
1397         return 0;
1398 }
1399
1400 static ssize_t dump_type_show(struct kobject *kobj,
1401                               struct kobj_attribute *attr, char *page)
1402 {
1403         return sprintf(page, "%s\n", dump_type_str(dump_type));
1404 }
1405
1406 static ssize_t dump_type_store(struct kobject *kobj,
1407                                struct kobj_attribute *attr,
1408                                const char *buf, size_t len)
1409 {
1410         int rc = -EINVAL;
1411
1412         if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1413                 rc = dump_set_type(DUMP_TYPE_NONE);
1414         else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1415                 rc = dump_set_type(DUMP_TYPE_CCW);
1416         else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1417                 rc = dump_set_type(DUMP_TYPE_FCP);
1418         return (rc != 0) ? rc : len;
1419 }
1420
1421 static struct kobj_attribute dump_type_attr =
1422         __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1423
1424 static struct kset *dump_kset;
1425
1426 static void diag308_dump(void *dump_block)
1427 {
1428         diag308(DIAG308_SET, dump_block);
1429         while (1) {
1430                 if (diag308(DIAG308_LOAD_NORMAL_DUMP, NULL) != 0x302)
1431                         break;
1432                 udelay_simple(USEC_PER_SEC);
1433         }
1434 }
1435
1436 static void __dump_run(void *unused)
1437 {
1438         struct ccw_dev_id devid;
1439         static char buf[100];
1440
1441         switch (dump_method) {
1442         case DUMP_METHOD_CCW_CIO:
1443                 devid.ssid  = dump_block_ccw->ipl_info.ccw.ssid;
1444                 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
1445                 reipl_ccw_dev(&devid);
1446                 break;
1447         case DUMP_METHOD_CCW_VM:
1448                 sprintf(buf, "STORE STATUS");
1449                 __cpcmd(buf, NULL, 0, NULL);
1450                 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
1451                 __cpcmd(buf, NULL, 0, NULL);
1452                 break;
1453         case DUMP_METHOD_CCW_DIAG:
1454                 diag308_dump(dump_block_ccw);
1455                 break;
1456         case DUMP_METHOD_FCP_DIAG:
1457                 diag308_dump(dump_block_fcp);
1458                 break;
1459         default:
1460                 break;
1461         }
1462 }
1463
1464 static void dump_run(struct shutdown_trigger *trigger)
1465 {
1466         if (dump_method == DUMP_METHOD_NONE)
1467                 return;
1468         smp_send_stop();
1469         smp_call_ipl_cpu(__dump_run, NULL);
1470 }
1471
1472 static int __init dump_ccw_init(void)
1473 {
1474         int rc;
1475
1476         dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1477         if (!dump_block_ccw)
1478                 return -ENOMEM;
1479         rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1480         if (rc) {
1481                 free_page((unsigned long)dump_block_ccw);
1482                 return rc;
1483         }
1484         dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1485         dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1486         dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1487         dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1488         dump_capabilities |= DUMP_TYPE_CCW;
1489         return 0;
1490 }
1491
1492 static int __init dump_fcp_init(void)
1493 {
1494         int rc;
1495
1496         if (!sclp_ipl_info.has_dump)
1497                 return 0; /* LDIPL DUMP is not installed */
1498         if (!diag308_set_works)
1499                 return 0;
1500         dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1501         if (!dump_block_fcp)
1502                 return -ENOMEM;
1503         rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1504         if (rc) {
1505                 free_page((unsigned long)dump_block_fcp);
1506                 return rc;
1507         }
1508         dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1509         dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1510         dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1511         dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1512         dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1513         dump_capabilities |= DUMP_TYPE_FCP;
1514         return 0;
1515 }
1516
1517 static int __init dump_init(void)
1518 {
1519         int rc;
1520
1521         dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1522         if (!dump_kset)
1523                 return -ENOMEM;
1524         rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1525         if (rc) {
1526                 kset_unregister(dump_kset);
1527                 return rc;
1528         }
1529         rc = dump_ccw_init();
1530         if (rc)
1531                 return rc;
1532         rc = dump_fcp_init();
1533         if (rc)
1534                 return rc;
1535         dump_set_type(DUMP_TYPE_NONE);
1536         return 0;
1537 }
1538
1539 static struct shutdown_action __refdata dump_action = {
1540         .name   = SHUTDOWN_ACTION_DUMP_STR,
1541         .fn     = dump_run,
1542         .init   = dump_init,
1543 };
1544
1545 static void dump_reipl_run(struct shutdown_trigger *trigger)
1546 {
1547         unsigned long ipib = (unsigned long) reipl_block_actual;
1548         unsigned int csum;
1549
1550         csum = (__force unsigned int)
1551                csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
1552         mem_assign_absolute(S390_lowcore.ipib, ipib);
1553         mem_assign_absolute(S390_lowcore.ipib_checksum, csum);
1554         dump_run(trigger);
1555 }
1556
1557 static int __init dump_reipl_init(void)
1558 {
1559         if (!diag308_set_works)
1560                 return -EOPNOTSUPP;
1561         else
1562                 return 0;
1563 }
1564
1565 static struct shutdown_action __refdata dump_reipl_action = {
1566         .name   = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1567         .fn     = dump_reipl_run,
1568         .init   = dump_reipl_init,
1569 };
1570
1571 /*
1572  * vmcmd shutdown action: Trigger vm command on shutdown.
1573  */
1574
1575 static char vmcmd_on_reboot[128];
1576 static char vmcmd_on_panic[128];
1577 static char vmcmd_on_halt[128];
1578 static char vmcmd_on_poff[128];
1579 static char vmcmd_on_restart[128];
1580
1581 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1582 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1583 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1584 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1585 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1586
1587 static struct attribute *vmcmd_attrs[] = {
1588         &sys_vmcmd_on_reboot_attr.attr,
1589         &sys_vmcmd_on_panic_attr.attr,
1590         &sys_vmcmd_on_halt_attr.attr,
1591         &sys_vmcmd_on_poff_attr.attr,
1592         &sys_vmcmd_on_restart_attr.attr,
1593         NULL,
1594 };
1595
1596 static struct attribute_group vmcmd_attr_group = {
1597         .attrs = vmcmd_attrs,
1598 };
1599
1600 static struct kset *vmcmd_kset;
1601
1602 static void vmcmd_run(struct shutdown_trigger *trigger)
1603 {
1604         char *cmd;
1605
1606         if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1607                 cmd = vmcmd_on_reboot;
1608         else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1609                 cmd = vmcmd_on_panic;
1610         else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1611                 cmd = vmcmd_on_halt;
1612         else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1613                 cmd = vmcmd_on_poff;
1614         else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
1615                 cmd = vmcmd_on_restart;
1616         else
1617                 return;
1618
1619         if (strlen(cmd) == 0)
1620                 return;
1621         __cpcmd(cmd, NULL, 0, NULL);
1622 }
1623
1624 static int vmcmd_init(void)
1625 {
1626         if (!MACHINE_IS_VM)
1627                 return -EOPNOTSUPP;
1628         vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1629         if (!vmcmd_kset)
1630                 return -ENOMEM;
1631         return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1632 }
1633
1634 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1635                                               vmcmd_run, vmcmd_init};
1636
1637 /*
1638  * stop shutdown action: Stop Linux on shutdown.
1639  */
1640
1641 static void stop_run(struct shutdown_trigger *trigger)
1642 {
1643         if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
1644             strcmp(trigger->name, ON_RESTART_STR) == 0)
1645                 disabled_wait((unsigned long) __builtin_return_address(0));
1646         smp_stop_cpu();
1647 }
1648
1649 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1650                                              stop_run, NULL};
1651
1652 /* action list */
1653
1654 static struct shutdown_action *shutdown_actions_list[] = {
1655         &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1656         &vmcmd_action, &stop_action};
1657 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1658
1659 /*
1660  * Trigger section
1661  */
1662
1663 static struct kset *shutdown_actions_kset;
1664
1665 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1666                        size_t len)
1667 {
1668         int i;
1669
1670         for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1671                 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1672                         if (shutdown_actions_list[i]->init_rc) {
1673                                 return shutdown_actions_list[i]->init_rc;
1674                         } else {
1675                                 trigger->action = shutdown_actions_list[i];
1676                                 return len;
1677                         }
1678                 }
1679         }
1680         return -EINVAL;
1681 }
1682
1683 /* on reipl */
1684
1685 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1686                                                     &reipl_action};
1687
1688 static ssize_t on_reboot_show(struct kobject *kobj,
1689                               struct kobj_attribute *attr, char *page)
1690 {
1691         return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1692 }
1693
1694 static ssize_t on_reboot_store(struct kobject *kobj,
1695                                struct kobj_attribute *attr,
1696                                const char *buf, size_t len)
1697 {
1698         return set_trigger(buf, &on_reboot_trigger, len);
1699 }
1700 static struct kobj_attribute on_reboot_attr = __ATTR_RW(on_reboot);
1701
1702 static void do_machine_restart(char *__unused)
1703 {
1704         smp_send_stop();
1705         on_reboot_trigger.action->fn(&on_reboot_trigger);
1706         reipl_run(NULL);
1707 }
1708 void (*_machine_restart)(char *command) = do_machine_restart;
1709
1710 /* on panic */
1711
1712 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1713
1714 static ssize_t on_panic_show(struct kobject *kobj,
1715                              struct kobj_attribute *attr, char *page)
1716 {
1717         return sprintf(page, "%s\n", on_panic_trigger.action->name);
1718 }
1719
1720 static ssize_t on_panic_store(struct kobject *kobj,
1721                               struct kobj_attribute *attr,
1722                               const char *buf, size_t len)
1723 {
1724         return set_trigger(buf, &on_panic_trigger, len);
1725 }
1726 static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic);
1727
1728 static void do_panic(void)
1729 {
1730         lgr_info_log();
1731         on_panic_trigger.action->fn(&on_panic_trigger);
1732         stop_run(&on_panic_trigger);
1733 }
1734
1735 /* on restart */
1736
1737 static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
1738         &stop_action};
1739
1740 static ssize_t on_restart_show(struct kobject *kobj,
1741                                struct kobj_attribute *attr, char *page)
1742 {
1743         return sprintf(page, "%s\n", on_restart_trigger.action->name);
1744 }
1745
1746 static ssize_t on_restart_store(struct kobject *kobj,
1747                                 struct kobj_attribute *attr,
1748                                 const char *buf, size_t len)
1749 {
1750         return set_trigger(buf, &on_restart_trigger, len);
1751 }
1752 static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart);
1753
1754 static void __do_restart(void *ignore)
1755 {
1756         __arch_local_irq_stosm(0x04); /* enable DAT */
1757         smp_send_stop();
1758 #ifdef CONFIG_CRASH_DUMP
1759         crash_kexec(NULL);
1760 #endif
1761         on_restart_trigger.action->fn(&on_restart_trigger);
1762         stop_run(&on_restart_trigger);
1763 }
1764
1765 void do_restart(void)
1766 {
1767         tracing_off();
1768         debug_locks_off();
1769         lgr_info_log();
1770         smp_call_online_cpu(__do_restart, NULL);
1771 }
1772
1773 /* on halt */
1774
1775 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1776
1777 static ssize_t on_halt_show(struct kobject *kobj,
1778                             struct kobj_attribute *attr, char *page)
1779 {
1780         return sprintf(page, "%s\n", on_halt_trigger.action->name);
1781 }
1782
1783 static ssize_t on_halt_store(struct kobject *kobj,
1784                              struct kobj_attribute *attr,
1785                              const char *buf, size_t len)
1786 {
1787         return set_trigger(buf, &on_halt_trigger, len);
1788 }
1789 static struct kobj_attribute on_halt_attr = __ATTR_RW(on_halt);
1790
1791 static void do_machine_halt(void)
1792 {
1793         smp_send_stop();
1794         on_halt_trigger.action->fn(&on_halt_trigger);
1795         stop_run(&on_halt_trigger);
1796 }
1797 void (*_machine_halt)(void) = do_machine_halt;
1798
1799 /* on power off */
1800
1801 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1802
1803 static ssize_t on_poff_show(struct kobject *kobj,
1804                             struct kobj_attribute *attr, char *page)
1805 {
1806         return sprintf(page, "%s\n", on_poff_trigger.action->name);
1807 }
1808
1809 static ssize_t on_poff_store(struct kobject *kobj,
1810                              struct kobj_attribute *attr,
1811                              const char *buf, size_t len)
1812 {
1813         return set_trigger(buf, &on_poff_trigger, len);
1814 }
1815 static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff);
1816
1817 static void do_machine_power_off(void)
1818 {
1819         smp_send_stop();
1820         on_poff_trigger.action->fn(&on_poff_trigger);
1821         stop_run(&on_poff_trigger);
1822 }
1823 void (*_machine_power_off)(void) = do_machine_power_off;
1824
1825 static struct attribute *shutdown_action_attrs[] = {
1826         &on_restart_attr.attr,
1827         &on_reboot_attr.attr,
1828         &on_panic_attr.attr,
1829         &on_halt_attr.attr,
1830         &on_poff_attr.attr,
1831         NULL,
1832 };
1833
1834 static struct attribute_group shutdown_action_attr_group = {
1835         .attrs = shutdown_action_attrs,
1836 };
1837
1838 static void __init shutdown_triggers_init(void)
1839 {
1840         shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1841                                                     firmware_kobj);
1842         if (!shutdown_actions_kset)
1843                 goto fail;
1844         if (sysfs_create_group(&shutdown_actions_kset->kobj,
1845                                &shutdown_action_attr_group))
1846                 goto fail;
1847         return;
1848 fail:
1849         panic("shutdown_triggers_init failed\n");
1850 }
1851
1852 static void __init shutdown_actions_init(void)
1853 {
1854         int i;
1855
1856         for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1857                 if (!shutdown_actions_list[i]->init)
1858                         continue;
1859                 shutdown_actions_list[i]->init_rc =
1860                         shutdown_actions_list[i]->init();
1861         }
1862 }
1863
1864 static int __init s390_ipl_init(void)
1865 {
1866         char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40};
1867
1868         sclp_early_get_ipl_info(&sclp_ipl_info);
1869         /*
1870          * Fix loadparm: There are systems where the (SCSI) LOADPARM
1871          * returned by read SCP info is invalid (contains EBCDIC blanks)
1872          * when the system has been booted via diag308. In that case we use
1873          * the value from diag308, if available.
1874          *
1875          * There are also systems where diag308 store does not work in
1876          * case the system is booted from HMC. Fortunately in this case
1877          * READ SCP info provides the correct value.
1878          */
1879         if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 &&
1880             diag308_set_works)
1881                 memcpy(sclp_ipl_info.loadparm, ipl_block.hdr.loadparm,
1882                        LOADPARM_LEN);
1883         shutdown_actions_init();
1884         shutdown_triggers_init();
1885         return 0;
1886 }
1887
1888 __initcall(s390_ipl_init);
1889
1890 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1891 {
1892         int sx, dx;
1893
1894         dx = 0;
1895         for (sx = 0; src[sx] != 0; sx++) {
1896                 if (src[sx] == '"')
1897                         continue;
1898                 dst[dx++] = src[sx];
1899                 if (dx >= n)
1900                         break;
1901         }
1902 }
1903
1904 static int __init vmcmd_on_reboot_setup(char *str)
1905 {
1906         if (!MACHINE_IS_VM)
1907                 return 1;
1908         strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1909         vmcmd_on_reboot[127] = 0;
1910         on_reboot_trigger.action = &vmcmd_action;
1911         return 1;
1912 }
1913 __setup("vmreboot=", vmcmd_on_reboot_setup);
1914
1915 static int __init vmcmd_on_panic_setup(char *str)
1916 {
1917         if (!MACHINE_IS_VM)
1918                 return 1;
1919         strncpy_skip_quote(vmcmd_on_panic, str, 127);
1920         vmcmd_on_panic[127] = 0;
1921         on_panic_trigger.action = &vmcmd_action;
1922         return 1;
1923 }
1924 __setup("vmpanic=", vmcmd_on_panic_setup);
1925
1926 static int __init vmcmd_on_halt_setup(char *str)
1927 {
1928         if (!MACHINE_IS_VM)
1929                 return 1;
1930         strncpy_skip_quote(vmcmd_on_halt, str, 127);
1931         vmcmd_on_halt[127] = 0;
1932         on_halt_trigger.action = &vmcmd_action;
1933         return 1;
1934 }
1935 __setup("vmhalt=", vmcmd_on_halt_setup);
1936
1937 static int __init vmcmd_on_poff_setup(char *str)
1938 {
1939         if (!MACHINE_IS_VM)
1940                 return 1;
1941         strncpy_skip_quote(vmcmd_on_poff, str, 127);
1942         vmcmd_on_poff[127] = 0;
1943         on_poff_trigger.action = &vmcmd_action;
1944         return 1;
1945 }
1946 __setup("vmpoff=", vmcmd_on_poff_setup);
1947
1948 static int on_panic_notify(struct notifier_block *self,
1949                            unsigned long event, void *data)
1950 {
1951         do_panic();
1952         return NOTIFY_OK;
1953 }
1954
1955 static struct notifier_block on_panic_nb = {
1956         .notifier_call = on_panic_notify,
1957         .priority = INT_MIN,
1958 };
1959
1960 void __init setup_ipl(void)
1961 {
1962         ipl_info.type = get_ipl_type();
1963         switch (ipl_info.type) {
1964         case IPL_TYPE_CCW:
1965                 ipl_info.data.ccw.dev_id.ssid = ipl_ssid;
1966                 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1967                 break;
1968         case IPL_TYPE_FCP:
1969         case IPL_TYPE_FCP_DUMP:
1970                 ipl_info.data.fcp.dev_id.ssid = 0;
1971                 ipl_info.data.fcp.dev_id.devno =
1972                         IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1973                 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1974                 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1975                 break;
1976         case IPL_TYPE_NSS:
1977                 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1978                         sizeof(ipl_info.data.nss.name));
1979                 break;
1980         case IPL_TYPE_UNKNOWN:
1981                 /* We have no info to copy */
1982                 break;
1983         }
1984         atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1985 }
1986
1987 void __init ipl_update_parameters(void)
1988 {
1989         int rc;
1990
1991         rc = diag308(DIAG308_STORE, &ipl_block);
1992         if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
1993                 diag308_set_works = 1;
1994 }
1995
1996 void __init ipl_verify_parameters(void)
1997 {
1998         struct cio_iplinfo iplinfo;
1999
2000         if (cio_get_iplinfo(&iplinfo))
2001                 return;
2002
2003         ipl_ssid = iplinfo.ssid;
2004         ipl_devno = iplinfo.devno;
2005         ipl_flags |= IPL_DEVNO_VALID;
2006         if (!iplinfo.is_qdio)
2007                 return;
2008         ipl_flags |= IPL_PARMBLOCK_VALID;
2009 }
2010
2011 static LIST_HEAD(rcall);
2012 static DEFINE_MUTEX(rcall_mutex);
2013
2014 void register_reset_call(struct reset_call *reset)
2015 {
2016         mutex_lock(&rcall_mutex);
2017         list_add(&reset->list, &rcall);
2018         mutex_unlock(&rcall_mutex);
2019 }
2020 EXPORT_SYMBOL_GPL(register_reset_call);
2021
2022 void unregister_reset_call(struct reset_call *reset)
2023 {
2024         mutex_lock(&rcall_mutex);
2025         list_del(&reset->list);
2026         mutex_unlock(&rcall_mutex);
2027 }
2028 EXPORT_SYMBOL_GPL(unregister_reset_call);
2029
2030 static void do_reset_calls(void)
2031 {
2032         struct reset_call *reset;
2033
2034         if (diag308_set_works) {
2035                 diag308_reset();
2036                 return;
2037         }
2038         list_for_each_entry(reset, &rcall, list)
2039                 reset->fn();
2040 }
2041
2042 void s390_reset_system(void)
2043 {
2044         struct lowcore *lc;
2045
2046         lc = (struct lowcore *)(unsigned long) store_prefix();
2047
2048         /* Stack for interrupt/machine check handler */
2049         lc->panic_stack = S390_lowcore.panic_stack;
2050
2051         /* Disable prefixing */
2052         set_prefix(0);
2053
2054         /* Disable lowcore protection */
2055         __ctl_clear_bit(0,28);
2056
2057         /* Set new machine check handler */
2058         S390_lowcore.mcck_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
2059         S390_lowcore.mcck_new_psw.addr =
2060                 (unsigned long) s390_base_mcck_handler;
2061
2062         /* Set new program check handler */
2063         S390_lowcore.program_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
2064         S390_lowcore.program_new_psw.addr =
2065                 (unsigned long) s390_base_pgm_handler;
2066
2067         do_reset_calls();
2068 }