arch/s390/kernel/ipl.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *    ipl/reipl/dump support for Linux on s390.
   4  *
   5  *    Copyright IBM Corp. 2005, 2012
   6  *    Author(s): Michael Holzheu <[email protected]>
   7  *               Heiko Carstens <[email protected]>
   8  *               Volker Sameske <[email protected]>
   9  */
  10
  11 #include <linux/types.h>
  12 #include <linux/export.h>
  13 #include <linux/init.h>
  14 #include <linux/device.h>
  15 #include <linux/delay.h>
  16 #include <linux/panic_notifier.h>
  17 #include <linux/reboot.h>
  18 #include <linux/ctype.h>
  19 #include <linux/fs.h>
  20 #include <linux/gfp.h>
  21 #include <linux/crash_dump.h>
  22 #include <linux/debug_locks.h>
  23 #include <asm/diag.h>
  24 #include <asm/ipl.h>
  25 #include <asm/smp.h>
  26 #include <asm/setup.h>
  27 #include <asm/cpcmd.h>
  28 #include <asm/ebcdic.h>
  29 #include <asm/sclp.h>
  30 #include <asm/checksum.h>
  31 #include <asm/debug.h>
  32 #include <asm/os_info.h>
  33 #include <asm/sections.h>
  34 #include <asm/boot_data.h>
  35 #include "entry.h"
  36
  37 #define IPL_PARM_BLOCK_VERSION 0
  38
  39 #define IPL_UNKNOWN_STR         "unknown"
  40 #define IPL_CCW_STR             "ccw"
  41 #define IPL_FCP_STR             "fcp"
  42 #define IPL_FCP_DUMP_STR        "fcp_dump"
  43 #define IPL_NVME_STR            "nvme"
  44 #define IPL_NVME_DUMP_STR       "nvme_dump"
  45 #define IPL_NSS_STR             "nss"
  46
  47 #define DUMP_CCW_STR            "ccw"
  48 #define DUMP_FCP_STR            "fcp"
  49 #define DUMP_NVME_STR           "nvme"
  50 #define DUMP_NONE_STR           "none"
  51
  52 /*
  53  * Four shutdown trigger types are supported:
  54  * - panic
  55  * - halt
  56  * - power off
  57  * - reipl
  58  * - restart
  59  */
  60 #define ON_PANIC_STR            "on_panic"
  61 #define ON_HALT_STR             "on_halt"
  62 #define ON_POFF_STR             "on_poff"
  63 #define ON_REIPL_STR            "on_reboot"
  64 #define ON_RESTART_STR          "on_restart"
  65
  66 struct shutdown_action;
  67 struct shutdown_trigger {
  68         char *name;
  69         struct shutdown_action *action;
  70 };
  71
  72 /*
  73  * The following shutdown action types are supported:
  74  */
  75 #define SHUTDOWN_ACTION_IPL_STR         "ipl"
  76 #define SHUTDOWN_ACTION_REIPL_STR       "reipl"
  77 #define SHUTDOWN_ACTION_DUMP_STR        "dump"
  78 #define SHUTDOWN_ACTION_VMCMD_STR       "vmcmd"
  79 #define SHUTDOWN_ACTION_STOP_STR        "stop"
  80 #define SHUTDOWN_ACTION_DUMP_REIPL_STR  "dump_reipl"
  81
  82 struct shutdown_action {
  83         char *name;
  84         void (*fn) (struct shutdown_trigger *trigger);
  85         int (*init) (void);
  86         int init_rc;
  87 };
  88
  89 static char *ipl_type_str(enum ipl_type type)
  90 {
  91         switch (type) {
  92         case IPL_TYPE_CCW:
  93                 return IPL_CCW_STR;
  94         case IPL_TYPE_FCP:
  95                 return IPL_FCP_STR;
  96         case IPL_TYPE_FCP_DUMP:
  97                 return IPL_FCP_DUMP_STR;
  98         case IPL_TYPE_NSS:
  99                 return IPL_NSS_STR;
 100         case IPL_TYPE_NVME:
 101                 return IPL_NVME_STR;
 102         case IPL_TYPE_NVME_DUMP:
 103                 return IPL_NVME_DUMP_STR;
 104         case IPL_TYPE_UNKNOWN:
 105         default:
 106                 return IPL_UNKNOWN_STR;
 107         }
 108 }
 109
 110 enum dump_type {
 111         DUMP_TYPE_NONE  = 1,
 112         DUMP_TYPE_CCW   = 2,
 113         DUMP_TYPE_FCP   = 4,
 114         DUMP_TYPE_NVME  = 8,
 115 };
 116
 117 static char *dump_type_str(enum dump_type type)
 118 {
 119         switch (type) {
 120         case DUMP_TYPE_NONE:
 121                 return DUMP_NONE_STR;
 122         case DUMP_TYPE_CCW:
 123                 return DUMP_CCW_STR;
 124         case DUMP_TYPE_FCP:
 125                 return DUMP_FCP_STR;
 126         case DUMP_TYPE_NVME:
 127                 return DUMP_NVME_STR;
 128         default:
 129                 return NULL;
 130         }
 131 }
 132
 133 int __bootdata_preserved(ipl_block_valid);
 134 struct ipl_parameter_block __bootdata_preserved(ipl_block);
 135 int __bootdata_preserved(ipl_secure_flag);
 136
 137 unsigned long __bootdata_preserved(ipl_cert_list_addr);
 138 unsigned long __bootdata_preserved(ipl_cert_list_size);
 139
 140 unsigned long __bootdata(early_ipl_comp_list_addr);
 141 unsigned long __bootdata(early_ipl_comp_list_size);
 142
 143 static int reipl_capabilities = IPL_TYPE_UNKNOWN;
 144
 145 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
 146 static struct ipl_parameter_block *reipl_block_fcp;
 147 static struct ipl_parameter_block *reipl_block_nvme;
 148 static struct ipl_parameter_block *reipl_block_ccw;
 149 static struct ipl_parameter_block *reipl_block_nss;
 150 static struct ipl_parameter_block *reipl_block_actual;
 151
 152 static int dump_capabilities = DUMP_TYPE_NONE;
 153 static enum dump_type dump_type = DUMP_TYPE_NONE;
 154 static struct ipl_parameter_block *dump_block_fcp;
 155 static struct ipl_parameter_block *dump_block_nvme;
 156 static struct ipl_parameter_block *dump_block_ccw;
 157
 158 static struct sclp_ipl_info sclp_ipl_info;
 159
 160 static bool reipl_nvme_clear;
 161 static bool reipl_fcp_clear;
 162 static bool reipl_ccw_clear;
 163
 164 static inline int __diag308(unsigned long subcode, void *addr)
 165 {
 166         union register_pair r1;
 167
 168         r1.even = (unsigned long) addr;
 169         r1.odd  = 0;
 170         asm volatile(
 171                 "       diag    %[r1],%[subcode],0x308\n"
 172                 "0:     nopr    %%r7\n"
 173                 EX_TABLE(0b,0b)
 174                 : [r1] "+&d" (r1.pair)
 175                 : [subcode] "d" (subcode)
 176                 : "cc", "memory");
 177         return r1.odd;
 178 }
 179
 180 int diag308(unsigned long subcode, void *addr)
 181 {
 182         diag_stat_inc(DIAG_STAT_X308);
 183         return __diag308(subcode, addr);
 184 }
 185 EXPORT_SYMBOL_GPL(diag308);
 186
 187 /* SYSFS */
 188
 189 #define IPL_ATTR_SHOW_FN(_prefix, _name, _format, args...)              \
 190 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,     \
 191                 struct kobj_attribute *attr,                            \
 192                 char *page)                                             \
 193 {                                                                       \
 194         return scnprintf(page, PAGE_SIZE, _format, ##args);             \
 195 }
 196
 197 #define IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk)                 \
 198 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,    \
 199                 struct kobj_attribute *attr,                            \
 200                 const char *buf, size_t len)                            \
 201 {                                                                       \
 202         unsigned long long ssid, devno;                                 \
 203                                                                         \
 204         if (sscanf(buf, "0.%llx.%llx\n", &ssid, &devno) != 2)           \
 205                 return -EINVAL;                                         \
 206                                                                         \
 207         if (ssid > __MAX_SSID || devno > __MAX_SUBCHANNEL)              \
 208                 return -EINVAL;                                         \
 209                                                                         \
 210         _ipl_blk.ssid = ssid;                                           \
 211         _ipl_blk.devno = devno;                                         \
 212         return len;                                                     \
 213 }
 214
 215 #define DEFINE_IPL_CCW_ATTR_RW(_prefix, _name, _ipl_blk)                \
 216 IPL_ATTR_SHOW_FN(_prefix, _name, "0.%x.%04x\n",                         \
 217                  _ipl_blk.ssid, _ipl_blk.devno);                        \
 218 IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk);                        \
 219 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 220         __ATTR(_name, (S_IRUGO | S_IWUSR),                              \
 221                sys_##_prefix##_##_name##_show,                          \
 222                sys_##_prefix##_##_name##_store)                         \
 223
 224 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value)             \
 225 IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value)                       \
 226 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 227         __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL)
 228
 229 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)   \
 230 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value) \
 231 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,    \
 232                 struct kobj_attribute *attr,                            \
 233                 const char *buf, size_t len)                            \
 234 {                                                                       \
 235         unsigned long long value;                                       \
 236         if (sscanf(buf, _fmt_in, &value) != 1)                          \
 237                 return -EINVAL;                                         \
 238         _value = value;                                                 \
 239         return len;                                                     \
 240 }                                                                       \
 241 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 242         __ATTR(_name,(S_IRUGO | S_IWUSR),                               \
 243                         sys_##_prefix##_##_name##_show,                 \
 244                         sys_##_prefix##_##_name##_store)
 245
 246 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
 247 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, _value)                      \
 248 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,    \
 249                 struct kobj_attribute *attr,                            \
 250                 const char *buf, size_t len)                            \
 251 {                                                                       \
 252         strncpy(_value, buf, sizeof(_value) - 1);                       \
 253         strim(_value);                                                  \
 254         return len;                                                     \
 255 }                                                                       \
 256 static struct kobj_attribute sys_##_prefix##_##_name##_attr =           \
 257         __ATTR(_name,(S_IRUGO | S_IWUSR),                               \
 258                         sys_##_prefix##_##_name##_show,                 \
 259                         sys_##_prefix##_##_name##_store)
 260
 261 /*
 262  * ipl section
 263  */
 264
 265 static __init enum ipl_type get_ipl_type(void)
 266 {
 267         if (!ipl_block_valid)
 268                 return IPL_TYPE_UNKNOWN;
 269
 270         switch (ipl_block.pb0_hdr.pbt) {
 271         case IPL_PBT_CCW:
 272                 return IPL_TYPE_CCW;
 273         case IPL_PBT_FCP:
 274                 if (ipl_block.fcp.opt == IPL_PB0_FCP_OPT_DUMP)
 275                         return IPL_TYPE_FCP_DUMP;
 276                 else
 277                         return IPL_TYPE_FCP;
 278         case IPL_PBT_NVME:
 279                 if (ipl_block.nvme.opt == IPL_PB0_NVME_OPT_DUMP)
 280                         return IPL_TYPE_NVME_DUMP;
 281                 else
 282                         return IPL_TYPE_NVME;
 283         }
 284         return IPL_TYPE_UNKNOWN;
 285 }
 286
 287 struct ipl_info ipl_info;
 288 EXPORT_SYMBOL_GPL(ipl_info);
 289
 290 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
 291                              char *page)
 292 {
 293         return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
 294 }
 295
 296 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
 297
 298 static ssize_t ipl_secure_show(struct kobject *kobj,
 299                                struct kobj_attribute *attr, char *page)
 300 {
 301         return sprintf(page, "%i\n", !!ipl_secure_flag);
 302 }
 303
 304 static struct kobj_attribute sys_ipl_secure_attr =
 305         __ATTR(secure, 0444, ipl_secure_show, NULL);
 306
 307 static ssize_t ipl_has_secure_show(struct kobject *kobj,
 308                                    struct kobj_attribute *attr, char *page)
 309 {
 310         return sprintf(page, "%i\n", !!sclp.has_sipl);
 311 }
 312
 313 static struct kobj_attribute sys_ipl_has_secure_attr =
 314         __ATTR(has_secure, 0444, ipl_has_secure_show, NULL);
 315
 316 static ssize_t ipl_vm_parm_show(struct kobject *kobj,
 317                                 struct kobj_attribute *attr, char *page)
 318 {
 319         char parm[DIAG308_VMPARM_SIZE + 1] = {};
 320
 321         if (ipl_block_valid && (ipl_block.pb0_hdr.pbt == IPL_PBT_CCW))
 322                 ipl_block_get_ascii_vmparm(parm, sizeof(parm), &ipl_block);
 323         return sprintf(page, "%s\n", parm);
 324 }
 325
 326 static struct kobj_attribute sys_ipl_vm_parm_attr =
 327         __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
 328
 329 static ssize_t sys_ipl_device_show(struct kobject *kobj,
 330                                    struct kobj_attribute *attr, char *page)
 331 {
 332         switch (ipl_info.type) {
 333         case IPL_TYPE_CCW:
 334                 return sprintf(page, "0.%x.%04x\n", ipl_block.ccw.ssid,
 335                                ipl_block.ccw.devno);
 336         case IPL_TYPE_FCP:
 337         case IPL_TYPE_FCP_DUMP:
 338                 return sprintf(page, "0.0.%04x\n", ipl_block.fcp.devno);
 339         case IPL_TYPE_NVME:
 340         case IPL_TYPE_NVME_DUMP:
 341                 return sprintf(page, "%08ux\n", ipl_block.nvme.fid);
 342         default:
 343                 return 0;
 344         }
 345 }
 346
 347 static struct kobj_attribute sys_ipl_device_attr =
 348         __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
 349
 350 static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
 351                                   struct bin_attribute *attr, char *buf,
 352                                   loff_t off, size_t count)
 353 {
 354         return memory_read_from_buffer(buf, count, &off, &ipl_block,
 355                                        ipl_block.hdr.len);
 356 }
 357 static struct bin_attribute ipl_parameter_attr =
 358         __BIN_ATTR(binary_parameter, S_IRUGO, ipl_parameter_read, NULL,
 359                    PAGE_SIZE);
 360
 361 static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
 362                                  struct bin_attribute *attr, char *buf,
 363                                  loff_t off, size_t count)
 364 {
 365         unsigned int size = ipl_block.fcp.scp_data_len;
 366         void *scp_data = &ipl_block.fcp.scp_data;
 367
 368         return memory_read_from_buffer(buf, count, &off, scp_data, size);
 369 }
 370
 371 static ssize_t ipl_nvme_scp_data_read(struct file *filp, struct kobject *kobj,
 372                                  struct bin_attribute *attr, char *buf,
 373                                  loff_t off, size_t count)
 374 {
 375         unsigned int size = ipl_block.nvme.scp_data_len;
 376         void *scp_data = &ipl_block.nvme.scp_data;
 377
 378         return memory_read_from_buffer(buf, count, &off, scp_data, size);
 379 }
 380
 381 static struct bin_attribute ipl_scp_data_attr =
 382         __BIN_ATTR(scp_data, S_IRUGO, ipl_scp_data_read, NULL, PAGE_SIZE);
 383
 384 static struct bin_attribute ipl_nvme_scp_data_attr =
 385         __BIN_ATTR(scp_data, S_IRUGO, ipl_nvme_scp_data_read, NULL, PAGE_SIZE);
 386
 387 static struct bin_attribute *ipl_fcp_bin_attrs[] = {
 388         &ipl_parameter_attr,
 389         &ipl_scp_data_attr,
 390         NULL,
 391 };
 392
 393 static struct bin_attribute *ipl_nvme_bin_attrs[] = {
 394         &ipl_parameter_attr,
 395         &ipl_nvme_scp_data_attr,
 396         NULL,
 397 };
 398
 399 /* FCP ipl device attributes */
 400
 401 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n",
 402                    (unsigned long long)ipl_block.fcp.wwpn);
 403 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n",
 404                    (unsigned long long)ipl_block.fcp.lun);
 405 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n",
 406                    (unsigned long long)ipl_block.fcp.bootprog);
 407 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n",
 408                    (unsigned long long)ipl_block.fcp.br_lba);
 409
 410 /* NVMe ipl device attributes */
 411 DEFINE_IPL_ATTR_RO(ipl_nvme, fid, "0x%08llx\n",
 412                    (unsigned long long)ipl_block.nvme.fid);
 413 DEFINE_IPL_ATTR_RO(ipl_nvme, nsid, "0x%08llx\n",
 414                    (unsigned long long)ipl_block.nvme.nsid);
 415 DEFINE_IPL_ATTR_RO(ipl_nvme, bootprog, "%lld\n",
 416                    (unsigned long long)ipl_block.nvme.bootprog);
 417 DEFINE_IPL_ATTR_RO(ipl_nvme, br_lba, "%lld\n",
 418                    (unsigned long long)ipl_block.nvme.br_lba);
 419
 420 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
 421                                      struct kobj_attribute *attr, char *page)
 422 {
 423         char loadparm[LOADPARM_LEN + 1] = {};
 424
 425         if (!sclp_ipl_info.is_valid)
 426                 return sprintf(page, "#unknown#\n");
 427         memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
 428         EBCASC(loadparm, LOADPARM_LEN);
 429         strim(loadparm);
 430         return sprintf(page, "%s\n", loadparm);
 431 }
 432
 433 static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
 434         __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
 435
 436 static struct attribute *ipl_fcp_attrs[] = {
 437         &sys_ipl_type_attr.attr,
 438         &sys_ipl_device_attr.attr,
 439         &sys_ipl_fcp_wwpn_attr.attr,
 440         &sys_ipl_fcp_lun_attr.attr,
 441         &sys_ipl_fcp_bootprog_attr.attr,
 442         &sys_ipl_fcp_br_lba_attr.attr,
 443         &sys_ipl_ccw_loadparm_attr.attr,
 444         &sys_ipl_secure_attr.attr,
 445         &sys_ipl_has_secure_attr.attr,
 446         NULL,
 447 };
 448
 449 static struct attribute_group ipl_fcp_attr_group = {
 450         .attrs = ipl_fcp_attrs,
 451         .bin_attrs = ipl_fcp_bin_attrs,
 452 };
 453
 454 static struct attribute *ipl_nvme_attrs[] = {
 455         &sys_ipl_type_attr.attr,
 456         &sys_ipl_nvme_fid_attr.attr,
 457         &sys_ipl_nvme_nsid_attr.attr,
 458         &sys_ipl_nvme_bootprog_attr.attr,
 459         &sys_ipl_nvme_br_lba_attr.attr,
 460         &sys_ipl_ccw_loadparm_attr.attr,
 461         &sys_ipl_secure_attr.attr,
 462         &sys_ipl_has_secure_attr.attr,
 463         NULL,
 464 };
 465
 466 static struct attribute_group ipl_nvme_attr_group = {
 467         .attrs = ipl_nvme_attrs,
 468         .bin_attrs = ipl_nvme_bin_attrs,
 469 };
 470
 471
 472 /* CCW ipl device attributes */
 473
 474 static struct attribute *ipl_ccw_attrs_vm[] = {
 475         &sys_ipl_type_attr.attr,
 476         &sys_ipl_device_attr.attr,
 477         &sys_ipl_ccw_loadparm_attr.attr,
 478         &sys_ipl_vm_parm_attr.attr,
 479         &sys_ipl_secure_attr.attr,
 480         &sys_ipl_has_secure_attr.attr,
 481         NULL,
 482 };
 483
 484 static struct attribute *ipl_ccw_attrs_lpar[] = {
 485         &sys_ipl_type_attr.attr,
 486         &sys_ipl_device_attr.attr,
 487         &sys_ipl_ccw_loadparm_attr.attr,
 488         &sys_ipl_secure_attr.attr,
 489         &sys_ipl_has_secure_attr.attr,
 490         NULL,
 491 };
 492
 493 static struct attribute_group ipl_ccw_attr_group_vm = {
 494         .attrs = ipl_ccw_attrs_vm,
 495 };
 496
 497 static struct attribute_group ipl_ccw_attr_group_lpar = {
 498         .attrs = ipl_ccw_attrs_lpar
 499 };
 500
 501 /* UNKNOWN ipl device attributes */
 502
 503 static struct attribute *ipl_unknown_attrs[] = {
 504         &sys_ipl_type_attr.attr,
 505         NULL,
 506 };
 507
 508 static struct attribute_group ipl_unknown_attr_group = {
 509         .attrs = ipl_unknown_attrs,
 510 };
 511
 512 static struct kset *ipl_kset;
 513
 514 static void __ipl_run(void *unused)
 515 {
 516         __bpon();
 517         diag308(DIAG308_LOAD_CLEAR, NULL);
 518 }
 519
 520 static void ipl_run(struct shutdown_trigger *trigger)
 521 {
 522         smp_call_ipl_cpu(__ipl_run, NULL);
 523 }
 524
 525 static int __init ipl_init(void)
 526 {
 527         int rc;
 528
 529         ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
 530         if (!ipl_kset) {
 531                 rc = -ENOMEM;
 532                 goto out;
 533         }
 534         switch (ipl_info.type) {
 535         case IPL_TYPE_CCW:
 536                 if (MACHINE_IS_VM)
 537                         rc = sysfs_create_group(&ipl_kset->kobj,
 538                                                 &ipl_ccw_attr_group_vm);
 539                 else
 540                         rc = sysfs_create_group(&ipl_kset->kobj,
 541                                                 &ipl_ccw_attr_group_lpar);
 542                 break;
 543         case IPL_TYPE_FCP:
 544         case IPL_TYPE_FCP_DUMP:
 545                 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
 546                 break;
 547         case IPL_TYPE_NVME:
 548         case IPL_TYPE_NVME_DUMP:
 549                 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nvme_attr_group);
 550                 break;
 551         default:
 552                 rc = sysfs_create_group(&ipl_kset->kobj,
 553                                         &ipl_unknown_attr_group);
 554                 break;
 555         }
 556 out:
 557         if (rc)
 558                 panic("ipl_init failed: rc = %i\n", rc);
 559
 560         return 0;
 561 }
 562
 563 static struct shutdown_action __refdata ipl_action = {
 564         .name   = SHUTDOWN_ACTION_IPL_STR,
 565         .fn     = ipl_run,
 566         .init   = ipl_init,
 567 };
 568
 569 /*
 570  * reipl shutdown action: Reboot Linux on shutdown.
 571  */
 572
 573 /* VM IPL PARM attributes */
 574 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
 575                                           char *page)
 576 {
 577         char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
 578
 579         ipl_block_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
 580         return sprintf(page, "%s\n", vmparm);
 581 }
 582
 583 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
 584                                           size_t vmparm_max,
 585                                           const char *buf, size_t len)
 586 {
 587         int i, ip_len;
 588
 589         /* ignore trailing newline */
 590         ip_len = len;
 591         if ((len > 0) && (buf[len - 1] == '\n'))
 592                 ip_len--;
 593
 594         if (ip_len > vmparm_max)
 595                 return -EINVAL;
 596
 597         /* parm is used to store kernel options, check for common chars */
 598         for (i = 0; i < ip_len; i++)
 599                 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
 600                         return -EINVAL;
 601
 602         memset(ipb->ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
 603         ipb->ccw.vm_parm_len = ip_len;
 604         if (ip_len > 0) {
 605                 ipb->ccw.vm_flags |= IPL_PB0_CCW_VM_FLAG_VP;
 606                 memcpy(ipb->ccw.vm_parm, buf, ip_len);
 607                 ASCEBC(ipb->ccw.vm_parm, ip_len);
 608         } else {
 609                 ipb->ccw.vm_flags &= ~IPL_PB0_CCW_VM_FLAG_VP;
 610         }
 611
 612         return len;
 613 }
 614
 615 /* NSS wrapper */
 616 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
 617                                      struct kobj_attribute *attr, char *page)
 618 {
 619         return reipl_generic_vmparm_show(reipl_block_nss, page);
 620 }
 621
 622 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
 623                                       struct kobj_attribute *attr,
 624                                       const char *buf, size_t len)
 625 {
 626         return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
 627 }
 628
 629 /* CCW wrapper */
 630 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
 631                                      struct kobj_attribute *attr, char *page)
 632 {
 633         return reipl_generic_vmparm_show(reipl_block_ccw, page);
 634 }
 635
 636 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
 637                                       struct kobj_attribute *attr,
 638                                       const char *buf, size_t len)
 639 {
 640         return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
 641 }
 642
 643 static struct kobj_attribute sys_reipl_nss_vmparm_attr =
 644         __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
 645                                         reipl_nss_vmparm_store);
 646 static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
 647         __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
 648                                         reipl_ccw_vmparm_store);
 649
 650 /* FCP reipl device attributes */
 651
 652 static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
 653                                       struct bin_attribute *attr,
 654                                       char *buf, loff_t off, size_t count)
 655 {
 656         size_t size = reipl_block_fcp->fcp.scp_data_len;
 657         void *scp_data = reipl_block_fcp->fcp.scp_data;
 658
 659         return memory_read_from_buffer(buf, count, &off, scp_data, size);
 660 }
 661
 662 static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
 663                                        struct bin_attribute *attr,
 664                                        char *buf, loff_t off, size_t count)
 665 {
 666         size_t scpdata_len = count;
 667         size_t padding;
 668
 669
 670         if (off)
 671                 return -EINVAL;
 672
 673         memcpy(reipl_block_fcp->fcp.scp_data, buf, count);
 674         if (scpdata_len % 8) {
 675                 padding = 8 - (scpdata_len % 8);
 676                 memset(reipl_block_fcp->fcp.scp_data + scpdata_len,
 677                        0, padding);
 678                 scpdata_len += padding;
 679         }
 680
 681         reipl_block_fcp->hdr.len = IPL_BP_FCP_LEN + scpdata_len;
 682         reipl_block_fcp->fcp.len = IPL_BP0_FCP_LEN + scpdata_len;
 683         reipl_block_fcp->fcp.scp_data_len = scpdata_len;
 684
 685         return count;
 686 }
 687 static struct bin_attribute sys_reipl_fcp_scp_data_attr =
 688         __BIN_ATTR(scp_data, (S_IRUGO | S_IWUSR), reipl_fcp_scpdata_read,
 689                    reipl_fcp_scpdata_write, DIAG308_SCPDATA_SIZE);
 690
 691 static struct bin_attribute *reipl_fcp_bin_attrs[] = {
 692         &sys_reipl_fcp_scp_data_attr,
 693         NULL,
 694 };
 695
 696 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n",
 697                    reipl_block_fcp->fcp.wwpn);
 698 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n",
 699                    reipl_block_fcp->fcp.lun);
 700 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
 701                    reipl_block_fcp->fcp.bootprog);
 702 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
 703                    reipl_block_fcp->fcp.br_lba);
 704 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
 705                    reipl_block_fcp->fcp.devno);
 706
 707 static void reipl_get_ascii_loadparm(char *loadparm,
 708                                      struct ipl_parameter_block *ibp)
 709 {
 710         memcpy(loadparm, ibp->common.loadparm, LOADPARM_LEN);
 711         EBCASC(loadparm, LOADPARM_LEN);
 712         loadparm[LOADPARM_LEN] = 0;
 713         strim(loadparm);
 714 }
 715
 716 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
 717                                            char *page)
 718 {
 719         char buf[LOADPARM_LEN + 1];
 720
 721         reipl_get_ascii_loadparm(buf, ipb);
 722         return sprintf(page, "%s\n", buf);
 723 }
 724
 725 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
 726                                             const char *buf, size_t len)
 727 {
 728         int i, lp_len;
 729
 730         /* ignore trailing newline */
 731         lp_len = len;
 732         if ((len > 0) && (buf[len - 1] == '\n'))
 733                 lp_len--;
 734         /* loadparm can have max 8 characters and must not start with a blank */
 735         if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
 736                 return -EINVAL;
 737         /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
 738         for (i = 0; i < lp_len; i++) {
 739                 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
 740                     (buf[i] == '.'))
 741                         continue;
 742                 return -EINVAL;
 743         }
 744         /* initialize loadparm with blanks */
 745         memset(ipb->common.loadparm, ' ', LOADPARM_LEN);
 746         /* copy and convert to ebcdic */
 747         memcpy(ipb->common.loadparm, buf, lp_len);
 748         ASCEBC(ipb->common.loadparm, LOADPARM_LEN);
 749         ipb->common.flags |= IPL_PB0_FLAG_LOADPARM;
 750         return len;
 751 }
 752
 753 /* FCP wrapper */
 754 static ssize_t reipl_fcp_loadparm_show(struct kobject *kobj,
 755                                        struct kobj_attribute *attr, char *page)
 756 {
 757         return reipl_generic_loadparm_show(reipl_block_fcp, page);
 758 }
 759
 760 static ssize_t reipl_fcp_loadparm_store(struct kobject *kobj,
 761                                         struct kobj_attribute *attr,
 762                                         const char *buf, size_t len)
 763 {
 764         return reipl_generic_loadparm_store(reipl_block_fcp, buf, len);
 765 }
 766
 767 static struct kobj_attribute sys_reipl_fcp_loadparm_attr =
 768         __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_fcp_loadparm_show,
 769                                             reipl_fcp_loadparm_store);
 770
 771 static ssize_t reipl_fcp_clear_show(struct kobject *kobj,
 772                                     struct kobj_attribute *attr, char *page)
 773 {
 774         return sprintf(page, "%u\n", reipl_fcp_clear);
 775 }
 776
 777 static ssize_t reipl_fcp_clear_store(struct kobject *kobj,
 778                                      struct kobj_attribute *attr,
 779                                      const char *buf, size_t len)
 780 {
 781         if (strtobool(buf, &reipl_fcp_clear) < 0)
 782                 return -EINVAL;
 783         return len;
 784 }
 785
 786 static struct attribute *reipl_fcp_attrs[] = {
 787         &sys_reipl_fcp_device_attr.attr,
 788         &sys_reipl_fcp_wwpn_attr.attr,
 789         &sys_reipl_fcp_lun_attr.attr,
 790         &sys_reipl_fcp_bootprog_attr.attr,
 791         &sys_reipl_fcp_br_lba_attr.attr,
 792         &sys_reipl_fcp_loadparm_attr.attr,
 793         NULL,
 794 };
 795
 796 static struct attribute_group reipl_fcp_attr_group = {
 797         .attrs = reipl_fcp_attrs,
 798         .bin_attrs = reipl_fcp_bin_attrs,
 799 };
 800
 801 static struct kobj_attribute sys_reipl_fcp_clear_attr =
 802         __ATTR(clear, 0644, reipl_fcp_clear_show, reipl_fcp_clear_store);
 803
 804 /* NVME reipl device attributes */
 805
 806 static ssize_t reipl_nvme_scpdata_read(struct file *filp, struct kobject *kobj,
 807                                       struct bin_attribute *attr,
 808                                       char *buf, loff_t off, size_t count)
 809 {
 810         size_t size = reipl_block_nvme->nvme.scp_data_len;
 811         void *scp_data = reipl_block_nvme->nvme.scp_data;
 812
 813         return memory_read_from_buffer(buf, count, &off, scp_data, size);
 814 }
 815
 816 static ssize_t reipl_nvme_scpdata_write(struct file *filp, struct kobject *kobj,
 817                                        struct bin_attribute *attr,
 818                                        char *buf, loff_t off, size_t count)
 819 {
 820         size_t scpdata_len = count;
 821         size_t padding;
 822
 823         if (off)
 824                 return -EINVAL;
 825
 826         memcpy(reipl_block_nvme->nvme.scp_data, buf, count);
 827         if (scpdata_len % 8) {
 828                 padding = 8 - (scpdata_len % 8);
 829                 memset(reipl_block_nvme->nvme.scp_data + scpdata_len,
 830                        0, padding);
 831                 scpdata_len += padding;
 832         }
 833
 834         reipl_block_nvme->hdr.len = IPL_BP_FCP_LEN + scpdata_len;
 835         reipl_block_nvme->nvme.len = IPL_BP0_FCP_LEN + scpdata_len;
 836         reipl_block_nvme->nvme.scp_data_len = scpdata_len;
 837
 838         return count;
 839 }
 840
 841 static struct bin_attribute sys_reipl_nvme_scp_data_attr =
 842         __BIN_ATTR(scp_data, (S_IRUGO | S_IWUSR), reipl_nvme_scpdata_read,
 843                    reipl_nvme_scpdata_write, DIAG308_SCPDATA_SIZE);
 844
 845 static struct bin_attribute *reipl_nvme_bin_attrs[] = {
 846         &sys_reipl_nvme_scp_data_attr,
 847         NULL,
 848 };
 849
 850 DEFINE_IPL_ATTR_RW(reipl_nvme, fid, "0x%08llx\n", "%llx\n",
 851                    reipl_block_nvme->nvme.fid);
 852 DEFINE_IPL_ATTR_RW(reipl_nvme, nsid, "0x%08llx\n", "%llx\n",
 853                    reipl_block_nvme->nvme.nsid);
 854 DEFINE_IPL_ATTR_RW(reipl_nvme, bootprog, "%lld\n", "%lld\n",
 855                    reipl_block_nvme->nvme.bootprog);
 856 DEFINE_IPL_ATTR_RW(reipl_nvme, br_lba, "%lld\n", "%lld\n",
 857                    reipl_block_nvme->nvme.br_lba);
 858
 859 /* nvme wrapper */
 860 static ssize_t reipl_nvme_loadparm_show(struct kobject *kobj,
 861                                        struct kobj_attribute *attr, char *page)
 862 {
 863         return reipl_generic_loadparm_show(reipl_block_nvme, page);
 864 }
 865
 866 static ssize_t reipl_nvme_loadparm_store(struct kobject *kobj,
 867                                         struct kobj_attribute *attr,
 868                                         const char *buf, size_t len)
 869 {
 870         return reipl_generic_loadparm_store(reipl_block_nvme, buf, len);
 871 }
 872
 873 static struct kobj_attribute sys_reipl_nvme_loadparm_attr =
 874         __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nvme_loadparm_show,
 875                                             reipl_nvme_loadparm_store);
 876
 877 static struct attribute *reipl_nvme_attrs[] = {
 878         &sys_reipl_nvme_fid_attr.attr,
 879         &sys_reipl_nvme_nsid_attr.attr,
 880         &sys_reipl_nvme_bootprog_attr.attr,
 881         &sys_reipl_nvme_br_lba_attr.attr,
 882         &sys_reipl_nvme_loadparm_attr.attr,
 883         NULL,
 884 };
 885
 886 static struct attribute_group reipl_nvme_attr_group = {
 887         .attrs = reipl_nvme_attrs,
 888         .bin_attrs = reipl_nvme_bin_attrs
 889 };
 890
 891 static ssize_t reipl_nvme_clear_show(struct kobject *kobj,
 892                                      struct kobj_attribute *attr, char *page)
 893 {
 894         return sprintf(page, "%u\n", reipl_nvme_clear);
 895 }
 896
 897 static ssize_t reipl_nvme_clear_store(struct kobject *kobj,
 898                                       struct kobj_attribute *attr,
 899                                       const char *buf, size_t len)
 900 {
 901         if (strtobool(buf, &reipl_nvme_clear) < 0)
 902                 return -EINVAL;
 903         return len;
 904 }
 905
 906 static struct kobj_attribute sys_reipl_nvme_clear_attr =
 907         __ATTR(clear, 0644, reipl_nvme_clear_show, reipl_nvme_clear_store);
 908
 909 /* CCW reipl device attributes */
 910 DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ccw);
 911
 912 /* NSS wrapper */
 913 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
 914                                        struct kobj_attribute *attr, char *page)
 915 {
 916         return reipl_generic_loadparm_show(reipl_block_nss, page);
 917 }
 918
 919 static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
 920                                         struct kobj_attribute *attr,
 921                                         const char *buf, size_t len)
 922 {
 923         return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
 924 }
 925
 926 /* CCW wrapper */
 927 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
 928                                        struct kobj_attribute *attr, char *page)
 929 {
 930         return reipl_generic_loadparm_show(reipl_block_ccw, page);
 931 }
 932
 933 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
 934                                         struct kobj_attribute *attr,
 935                                         const char *buf, size_t len)
 936 {
 937         return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
 938 }
 939
 940 static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
 941         __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
 942                                             reipl_ccw_loadparm_store);
 943
 944 static ssize_t reipl_ccw_clear_show(struct kobject *kobj,
 945                                     struct kobj_attribute *attr, char *page)
 946 {
 947         return sprintf(page, "%u\n", reipl_ccw_clear);
 948 }
 949
 950 static ssize_t reipl_ccw_clear_store(struct kobject *kobj,
 951                                      struct kobj_attribute *attr,
 952                                      const char *buf, size_t len)
 953 {
 954         if (strtobool(buf, &reipl_ccw_clear) < 0)
 955                 return -EINVAL;
 956         return len;
 957 }
 958
 959 static struct kobj_attribute sys_reipl_ccw_clear_attr =
 960         __ATTR(clear, 0644, reipl_ccw_clear_show, reipl_ccw_clear_store);
 961
 962 static struct attribute *reipl_ccw_attrs_vm[] = {
 963         &sys_reipl_ccw_device_attr.attr,
 964         &sys_reipl_ccw_loadparm_attr.attr,
 965         &sys_reipl_ccw_vmparm_attr.attr,
 966         &sys_reipl_ccw_clear_attr.attr,
 967         NULL,
 968 };
 969
 970 static struct attribute *reipl_ccw_attrs_lpar[] = {
 971         &sys_reipl_ccw_device_attr.attr,
 972         &sys_reipl_ccw_loadparm_attr.attr,
 973         &sys_reipl_ccw_clear_attr.attr,
 974         NULL,
 975 };
 976
 977 static struct attribute_group reipl_ccw_attr_group_vm = {
 978         .name  = IPL_CCW_STR,
 979         .attrs = reipl_ccw_attrs_vm,
 980 };
 981
 982 static struct attribute_group reipl_ccw_attr_group_lpar = {
 983         .name  = IPL_CCW_STR,
 984         .attrs = reipl_ccw_attrs_lpar,
 985 };
 986
 987
 988 /* NSS reipl device attributes */
 989 static void reipl_get_ascii_nss_name(char *dst,
 990                                      struct ipl_parameter_block *ipb)
 991 {
 992         memcpy(dst, ipb->ccw.nss_name, NSS_NAME_SIZE);
 993         EBCASC(dst, NSS_NAME_SIZE);
 994         dst[NSS_NAME_SIZE] = 0;
 995 }
 996
 997 static ssize_t reipl_nss_name_show(struct kobject *kobj,
 998                                    struct kobj_attribute *attr, char *page)
 999 {
1000         char nss_name[NSS_NAME_SIZE + 1] = {};
1001
1002         reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
1003         return sprintf(page, "%s\n", nss_name);
1004 }
1005
1006 static ssize_t reipl_nss_name_store(struct kobject *kobj,
1007                                     struct kobj_attribute *attr,
1008                                     const char *buf, size_t len)
1009 {
1010         int nss_len;
1011
1012         /* ignore trailing newline */
1013         nss_len = len;
1014         if ((len > 0) && (buf[len - 1] == '\n'))
1015                 nss_len--;
1016
1017         if (nss_len > NSS_NAME_SIZE)
1018                 return -EINVAL;
1019
1020         memset(reipl_block_nss->ccw.nss_name, 0x40, NSS_NAME_SIZE);
1021         if (nss_len > 0) {
1022                 reipl_block_nss->ccw.vm_flags |= IPL_PB0_CCW_VM_FLAG_NSS;
1023                 memcpy(reipl_block_nss->ccw.nss_name, buf, nss_len);
1024                 ASCEBC(reipl_block_nss->ccw.nss_name, nss_len);
1025                 EBC_TOUPPER(reipl_block_nss->ccw.nss_name, nss_len);
1026         } else {
1027                 reipl_block_nss->ccw.vm_flags &= ~IPL_PB0_CCW_VM_FLAG_NSS;
1028         }
1029
1030         return len;
1031 }
1032
1033 static struct kobj_attribute sys_reipl_nss_name_attr =
1034         __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
1035                                         reipl_nss_name_store);
1036
1037 static struct kobj_attribute sys_reipl_nss_loadparm_attr =
1038         __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
1039                                             reipl_nss_loadparm_store);
1040
1041 static struct attribute *reipl_nss_attrs[] = {
1042         &sys_reipl_nss_name_attr.attr,
1043         &sys_reipl_nss_loadparm_attr.attr,
1044         &sys_reipl_nss_vmparm_attr.attr,
1045         NULL,
1046 };
1047
1048 static struct attribute_group reipl_nss_attr_group = {
1049         .name  = IPL_NSS_STR,
1050         .attrs = reipl_nss_attrs,
1051 };
1052
1053 void set_os_info_reipl_block(void)
1054 {
1055         os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual,
1056                           reipl_block_actual->hdr.len);
1057 }
1058
1059 /* reipl type */
1060
1061 static int reipl_set_type(enum ipl_type type)
1062 {
1063         if (!(reipl_capabilities & type))
1064                 return -EINVAL;
1065
1066         switch(type) {
1067         case IPL_TYPE_CCW:
1068                 reipl_block_actual = reipl_block_ccw;
1069                 break;
1070         case IPL_TYPE_FCP:
1071                 reipl_block_actual = reipl_block_fcp;
1072                 break;
1073         case IPL_TYPE_NVME:
1074                 reipl_block_actual = reipl_block_nvme;
1075                 break;
1076         case IPL_TYPE_NSS:
1077                 reipl_block_actual = reipl_block_nss;
1078                 break;
1079         default:
1080                 break;
1081         }
1082         reipl_type = type;
1083         return 0;
1084 }
1085
1086 static ssize_t reipl_type_show(struct kobject *kobj,
1087                                struct kobj_attribute *attr, char *page)
1088 {
1089         return sprintf(page, "%s\n", ipl_type_str(reipl_type));
1090 }
1091
1092 static ssize_t reipl_type_store(struct kobject *kobj,
1093                                 struct kobj_attribute *attr,
1094                                 const char *buf, size_t len)
1095 {
1096         int rc = -EINVAL;
1097
1098         if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1099                 rc = reipl_set_type(IPL_TYPE_CCW);
1100         else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1101                 rc = reipl_set_type(IPL_TYPE_FCP);
1102         else if (strncmp(buf, IPL_NVME_STR, strlen(IPL_NVME_STR)) == 0)
1103                 rc = reipl_set_type(IPL_TYPE_NVME);
1104         else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1105                 rc = reipl_set_type(IPL_TYPE_NSS);
1106         return (rc != 0) ? rc : len;
1107 }
1108
1109 static struct kobj_attribute reipl_type_attr =
1110         __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
1111
1112 static struct kset *reipl_kset;
1113 static struct kset *reipl_fcp_kset;
1114 static struct kset *reipl_nvme_kset;
1115
1116 static void __reipl_run(void *unused)
1117 {
1118         switch (reipl_type) {
1119         case IPL_TYPE_CCW:
1120                 diag308(DIAG308_SET, reipl_block_ccw);
1121                 if (reipl_ccw_clear)
1122                         diag308(DIAG308_LOAD_CLEAR, NULL);
1123                 else
1124                         diag308(DIAG308_LOAD_NORMAL_DUMP, NULL);
1125                 break;
1126         case IPL_TYPE_FCP:
1127                 diag308(DIAG308_SET, reipl_block_fcp);
1128                 if (reipl_fcp_clear)
1129                         diag308(DIAG308_LOAD_CLEAR, NULL);
1130                 else
1131                         diag308(DIAG308_LOAD_NORMAL, NULL);
1132                 break;
1133         case IPL_TYPE_NVME:
1134                 diag308(DIAG308_SET, reipl_block_nvme);
1135                 if (reipl_nvme_clear)
1136                         diag308(DIAG308_LOAD_CLEAR, NULL);
1137                 else
1138                         diag308(DIAG308_LOAD_NORMAL, NULL);
1139                 break;
1140         case IPL_TYPE_NSS:
1141                 diag308(DIAG308_SET, reipl_block_nss);
1142                 diag308(DIAG308_LOAD_CLEAR, NULL);
1143                 break;
1144         case IPL_TYPE_UNKNOWN:
1145                 diag308(DIAG308_LOAD_CLEAR, NULL);
1146                 break;
1147         case IPL_TYPE_FCP_DUMP:
1148         case IPL_TYPE_NVME_DUMP:
1149                 break;
1150         }
1151         disabled_wait();
1152 }
1153
1154 static void reipl_run(struct shutdown_trigger *trigger)
1155 {
1156         smp_call_ipl_cpu(__reipl_run, NULL);
1157 }
1158
1159 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
1160 {
1161         ipb->hdr.len = IPL_BP_CCW_LEN;
1162         ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1163         ipb->pb0_hdr.len = IPL_BP0_CCW_LEN;
1164         ipb->pb0_hdr.pbt = IPL_PBT_CCW;
1165 }
1166
1167 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1168 {
1169         /* LOADPARM */
1170         /* check if read scp info worked and set loadparm */
1171         if (sclp_ipl_info.is_valid)
1172                 memcpy(ipb->ccw.loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
1173         else
1174                 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1175                 memset(ipb->ccw.loadparm, 0x40, LOADPARM_LEN);
1176         ipb->ccw.flags = IPL_PB0_FLAG_LOADPARM;
1177
1178         /* VM PARM */
1179         if (MACHINE_IS_VM && ipl_block_valid &&
1180             (ipl_block.ccw.vm_flags & IPL_PB0_CCW_VM_FLAG_VP)) {
1181
1182                 ipb->ccw.vm_flags |= IPL_PB0_CCW_VM_FLAG_VP;
1183                 ipb->ccw.vm_parm_len = ipl_block.ccw.vm_parm_len;
1184                 memcpy(ipb->ccw.vm_parm,
1185                        ipl_block.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1186         }
1187 }
1188
1189 static int __init reipl_nss_init(void)
1190 {
1191         int rc;
1192
1193         if (!MACHINE_IS_VM)
1194                 return 0;
1195
1196         reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1197         if (!reipl_block_nss)
1198                 return -ENOMEM;
1199
1200         rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1201         if (rc)
1202                 return rc;
1203
1204         reipl_block_ccw_init(reipl_block_nss);
1205         reipl_capabilities |= IPL_TYPE_NSS;
1206         return 0;
1207 }
1208
1209 static int __init reipl_ccw_init(void)
1210 {
1211         int rc;
1212
1213         reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1214         if (!reipl_block_ccw)
1215                 return -ENOMEM;
1216
1217         rc = sysfs_create_group(&reipl_kset->kobj,
1218                                 MACHINE_IS_VM ? &reipl_ccw_attr_group_vm
1219                                               : &reipl_ccw_attr_group_lpar);
1220         if (rc)
1221                 return rc;
1222
1223         reipl_block_ccw_init(reipl_block_ccw);
1224         if (ipl_info.type == IPL_TYPE_CCW) {
1225                 reipl_block_ccw->ccw.ssid = ipl_block.ccw.ssid;
1226                 reipl_block_ccw->ccw.devno = ipl_block.ccw.devno;
1227                 reipl_block_ccw_fill_parms(reipl_block_ccw);
1228         }
1229
1230         reipl_capabilities |= IPL_TYPE_CCW;
1231         return 0;
1232 }
1233
1234 static int __init reipl_fcp_init(void)
1235 {
1236         int rc;
1237
1238         reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1239         if (!reipl_block_fcp)
1240                 return -ENOMEM;
1241
1242         /* sysfs: create fcp kset for mixing attr group and bin attrs */
1243         reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1244                                              &reipl_kset->kobj);
1245         if (!reipl_fcp_kset) {
1246                 free_page((unsigned long) reipl_block_fcp);
1247                 return -ENOMEM;
1248         }
1249
1250         rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1251         if (rc)
1252                 goto out1;
1253
1254         if (test_facility(141)) {
1255                 rc = sysfs_create_file(&reipl_fcp_kset->kobj,
1256                                        &sys_reipl_fcp_clear_attr.attr);
1257                 if (rc)
1258                         goto out2;
1259         } else {
1260                 reipl_fcp_clear = true;
1261         }
1262
1263         if (ipl_info.type == IPL_TYPE_FCP) {
1264                 memcpy(reipl_block_fcp, &ipl_block, sizeof(ipl_block));
1265                 /*
1266                  * Fix loadparm: There are systems where the (SCSI) LOADPARM
1267                  * is invalid in the SCSI IPL parameter block, so take it
1268                  * always from sclp_ipl_info.
1269                  */
1270                 memcpy(reipl_block_fcp->fcp.loadparm, sclp_ipl_info.loadparm,
1271                        LOADPARM_LEN);
1272         } else {
1273                 reipl_block_fcp->hdr.len = IPL_BP_FCP_LEN;
1274                 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1275                 reipl_block_fcp->fcp.len = IPL_BP0_FCP_LEN;
1276                 reipl_block_fcp->fcp.pbt = IPL_PBT_FCP;
1277                 reipl_block_fcp->fcp.opt = IPL_PB0_FCP_OPT_IPL;
1278         }
1279         reipl_capabilities |= IPL_TYPE_FCP;
1280         return 0;
1281
1282 out2:
1283         sysfs_remove_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1284 out1:
1285         kset_unregister(reipl_fcp_kset);
1286         free_page((unsigned long) reipl_block_fcp);
1287         return rc;
1288 }
1289
1290 static int __init reipl_nvme_init(void)
1291 {
1292         int rc;
1293
1294         reipl_block_nvme = (void *) get_zeroed_page(GFP_KERNEL);
1295         if (!reipl_block_nvme)
1296                 return -ENOMEM;
1297
1298         /* sysfs: create kset for mixing attr group and bin attrs */
1299         reipl_nvme_kset = kset_create_and_add(IPL_NVME_STR, NULL,
1300                                              &reipl_kset->kobj);
1301         if (!reipl_nvme_kset) {
1302                 free_page((unsigned long) reipl_block_nvme);
1303                 return -ENOMEM;
1304         }
1305
1306         rc = sysfs_create_group(&reipl_nvme_kset->kobj, &reipl_nvme_attr_group);
1307         if (rc)
1308                 goto out1;
1309
1310         if (test_facility(141)) {
1311                 rc = sysfs_create_file(&reipl_nvme_kset->kobj,
1312                                        &sys_reipl_nvme_clear_attr.attr);
1313                 if (rc)
1314                         goto out2;
1315         } else {
1316                 reipl_nvme_clear = true;
1317         }
1318
1319         if (ipl_info.type == IPL_TYPE_NVME) {
1320                 memcpy(reipl_block_nvme, &ipl_block, sizeof(ipl_block));
1321                 /*
1322                  * Fix loadparm: There are systems where the (SCSI) LOADPARM
1323                  * is invalid in the IPL parameter block, so take it
1324                  * always from sclp_ipl_info.
1325                  */
1326                 memcpy(reipl_block_nvme->nvme.loadparm, sclp_ipl_info.loadparm,
1327                        LOADPARM_LEN);
1328         } else {
1329                 reipl_block_nvme->hdr.len = IPL_BP_NVME_LEN;
1330                 reipl_block_nvme->hdr.version = IPL_PARM_BLOCK_VERSION;
1331                 reipl_block_nvme->nvme.len = IPL_BP0_NVME_LEN;
1332                 reipl_block_nvme->nvme.pbt = IPL_PBT_NVME;
1333                 reipl_block_nvme->nvme.opt = IPL_PB0_NVME_OPT_IPL;
1334         }
1335         reipl_capabilities |= IPL_TYPE_NVME;
1336         return 0;
1337
1338 out2:
1339         sysfs_remove_group(&reipl_nvme_kset->kobj, &reipl_nvme_attr_group);
1340 out1:
1341         kset_unregister(reipl_nvme_kset);
1342         free_page((unsigned long) reipl_block_nvme);
1343         return rc;
1344 }
1345
1346 static int __init reipl_type_init(void)
1347 {
1348         enum ipl_type reipl_type = ipl_info.type;
1349         struct ipl_parameter_block *reipl_block;
1350         unsigned long size;
1351
1352         reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size);
1353         if (!reipl_block)
1354                 goto out;
1355         /*
1356          * If we have an OS info reipl block, this will be used
1357          */
1358         if (reipl_block->pb0_hdr.pbt == IPL_PBT_FCP) {
1359                 memcpy(reipl_block_fcp, reipl_block, size);
1360                 reipl_type = IPL_TYPE_FCP;
1361         } else if (reipl_block->pb0_hdr.pbt == IPL_PBT_NVME) {
1362                 memcpy(reipl_block_nvme, reipl_block, size);
1363                 reipl_type = IPL_TYPE_NVME;
1364         } else if (reipl_block->pb0_hdr.pbt == IPL_PBT_CCW) {
1365                 memcpy(reipl_block_ccw, reipl_block, size);
1366                 reipl_type = IPL_TYPE_CCW;
1367         }
1368 out:
1369         return reipl_set_type(reipl_type);
1370 }
1371
1372 static int __init reipl_init(void)
1373 {
1374         int rc;
1375
1376         reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1377         if (!reipl_kset)
1378                 return -ENOMEM;
1379         rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1380         if (rc) {
1381                 kset_unregister(reipl_kset);
1382                 return rc;
1383         }
1384         rc = reipl_ccw_init();
1385         if (rc)
1386                 return rc;
1387         rc = reipl_fcp_init();
1388         if (rc)
1389                 return rc;
1390         rc = reipl_nvme_init();
1391         if (rc)
1392                 return rc;
1393         rc = reipl_nss_init();
1394         if (rc)
1395                 return rc;
1396         return reipl_type_init();
1397 }
1398
1399 static struct shutdown_action __refdata reipl_action = {
1400         .name   = SHUTDOWN_ACTION_REIPL_STR,
1401         .fn     = reipl_run,
1402         .init   = reipl_init,
1403 };
1404
1405 /*
1406  * dump shutdown action: Dump Linux on shutdown.
1407  */
1408
1409 /* FCP dump device attributes */
1410
1411 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n",
1412                    dump_block_fcp->fcp.wwpn);
1413 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n",
1414                    dump_block_fcp->fcp.lun);
1415 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1416                    dump_block_fcp->fcp.bootprog);
1417 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1418                    dump_block_fcp->fcp.br_lba);
1419 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1420                    dump_block_fcp->fcp.devno);
1421
1422 static struct attribute *dump_fcp_attrs[] = {
1423         &sys_dump_fcp_device_attr.attr,
1424         &sys_dump_fcp_wwpn_attr.attr,
1425         &sys_dump_fcp_lun_attr.attr,
1426         &sys_dump_fcp_bootprog_attr.attr,
1427         &sys_dump_fcp_br_lba_attr.attr,
1428         NULL,
1429 };
1430
1431 static struct attribute_group dump_fcp_attr_group = {
1432         .name  = IPL_FCP_STR,
1433         .attrs = dump_fcp_attrs,
1434 };
1435
1436 /* NVME dump device attributes */
1437 DEFINE_IPL_ATTR_RW(dump_nvme, fid, "0x%08llx\n", "%llx\n",
1438                    dump_block_nvme->nvme.fid);
1439 DEFINE_IPL_ATTR_RW(dump_nvme, nsid, "0x%08llx\n", "%llx\n",
1440                    dump_block_nvme->nvme.nsid);
1441 DEFINE_IPL_ATTR_RW(dump_nvme, bootprog, "%lld\n", "%llx\n",
1442                    dump_block_nvme->nvme.bootprog);
1443 DEFINE_IPL_ATTR_RW(dump_nvme, br_lba, "%lld\n", "%llx\n",
1444                    dump_block_nvme->nvme.br_lba);
1445
1446 static struct attribute *dump_nvme_attrs[] = {
1447         &sys_dump_nvme_fid_attr.attr,
1448         &sys_dump_nvme_nsid_attr.attr,
1449         &sys_dump_nvme_bootprog_attr.attr,
1450         &sys_dump_nvme_br_lba_attr.attr,
1451         NULL,
1452 };
1453
1454 static struct attribute_group dump_nvme_attr_group = {
1455         .name  = IPL_NVME_STR,
1456         .attrs = dump_nvme_attrs,
1457 };
1458
1459 /* CCW dump device attributes */
1460 DEFINE_IPL_CCW_ATTR_RW(dump_ccw, device, dump_block_ccw->ccw);
1461
1462 static struct attribute *dump_ccw_attrs[] = {
1463         &sys_dump_ccw_device_attr.attr,
1464         NULL,
1465 };
1466
1467 static struct attribute_group dump_ccw_attr_group = {
1468         .name  = IPL_CCW_STR,
1469         .attrs = dump_ccw_attrs,
1470 };
1471
1472 /* dump type */
1473
1474 static int dump_set_type(enum dump_type type)
1475 {
1476         if (!(dump_capabilities & type))
1477                 return -EINVAL;
1478         dump_type = type;
1479         return 0;
1480 }
1481
1482 static ssize_t dump_type_show(struct kobject *kobj,
1483                               struct kobj_attribute *attr, char *page)
1484 {
1485         return sprintf(page, "%s\n", dump_type_str(dump_type));
1486 }
1487
1488 static ssize_t dump_type_store(struct kobject *kobj,
1489                                struct kobj_attribute *attr,
1490                                const char *buf, size_t len)
1491 {
1492         int rc = -EINVAL;
1493
1494         if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1495                 rc = dump_set_type(DUMP_TYPE_NONE);
1496         else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1497                 rc = dump_set_type(DUMP_TYPE_CCW);
1498         else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1499                 rc = dump_set_type(DUMP_TYPE_FCP);
1500         else if (strncmp(buf, DUMP_NVME_STR, strlen(DUMP_NVME_STR)) == 0)
1501                 rc = dump_set_type(DUMP_TYPE_NVME);
1502         return (rc != 0) ? rc : len;
1503 }
1504
1505 static struct kobj_attribute dump_type_attr =
1506         __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1507
1508 static struct kset *dump_kset;
1509
1510 static void diag308_dump(void *dump_block)
1511 {
1512         diag308(DIAG308_SET, dump_block);
1513         while (1) {
1514                 if (diag308(DIAG308_LOAD_NORMAL_DUMP, NULL) != 0x302)
1515                         break;
1516                 udelay(USEC_PER_SEC);
1517         }
1518 }
1519
1520 static void __dump_run(void *unused)
1521 {
1522         switch (dump_type) {
1523         case DUMP_TYPE_CCW:
1524                 diag308_dump(dump_block_ccw);
1525                 break;
1526         case DUMP_TYPE_FCP:
1527                 diag308_dump(dump_block_fcp);
1528                 break;
1529         case DUMP_TYPE_NVME:
1530                 diag308_dump(dump_block_nvme);
1531                 break;
1532         default:
1533                 break;
1534         }
1535 }
1536
1537 static void dump_run(struct shutdown_trigger *trigger)
1538 {
1539         if (dump_type == DUMP_TYPE_NONE)
1540                 return;
1541         smp_send_stop();
1542         smp_call_ipl_cpu(__dump_run, NULL);
1543 }
1544
1545 static int __init dump_ccw_init(void)
1546 {
1547         int rc;
1548
1549         dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1550         if (!dump_block_ccw)
1551                 return -ENOMEM;
1552         rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1553         if (rc) {
1554                 free_page((unsigned long)dump_block_ccw);
1555                 return rc;
1556         }
1557         dump_block_ccw->hdr.len = IPL_BP_CCW_LEN;
1558         dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1559         dump_block_ccw->ccw.len = IPL_BP0_CCW_LEN;
1560         dump_block_ccw->ccw.pbt = IPL_PBT_CCW;
1561         dump_capabilities |= DUMP_TYPE_CCW;
1562         return 0;
1563 }
1564
1565 static int __init dump_fcp_init(void)
1566 {
1567         int rc;
1568
1569         if (!sclp_ipl_info.has_dump)
1570                 return 0; /* LDIPL DUMP is not installed */
1571         dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1572         if (!dump_block_fcp)
1573                 return -ENOMEM;
1574         rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1575         if (rc) {
1576                 free_page((unsigned long)dump_block_fcp);
1577                 return rc;
1578         }
1579         dump_block_fcp->hdr.len = IPL_BP_FCP_LEN;
1580         dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1581         dump_block_fcp->fcp.len = IPL_BP0_FCP_LEN;
1582         dump_block_fcp->fcp.pbt = IPL_PBT_FCP;
1583         dump_block_fcp->fcp.opt = IPL_PB0_FCP_OPT_DUMP;
1584         dump_capabilities |= DUMP_TYPE_FCP;
1585         return 0;
1586 }
1587
1588 static int __init dump_nvme_init(void)
1589 {
1590         int rc;
1591
1592         if (!sclp_ipl_info.has_dump)
1593                 return 0; /* LDIPL DUMP is not installed */
1594         dump_block_nvme = (void *) get_zeroed_page(GFP_KERNEL);
1595         if (!dump_block_nvme)
1596                 return -ENOMEM;
1597         rc = sysfs_create_group(&dump_kset->kobj, &dump_nvme_attr_group);
1598         if (rc) {
1599                 free_page((unsigned long)dump_block_nvme);
1600                 return rc;
1601         }
1602         dump_block_nvme->hdr.len = IPL_BP_NVME_LEN;
1603         dump_block_nvme->hdr.version = IPL_PARM_BLOCK_VERSION;
1604         dump_block_nvme->fcp.len = IPL_BP0_NVME_LEN;
1605         dump_block_nvme->fcp.pbt = IPL_PBT_NVME;
1606         dump_block_nvme->fcp.opt = IPL_PB0_NVME_OPT_DUMP;
1607         dump_capabilities |= DUMP_TYPE_NVME;
1608         return 0;
1609 }
1610
1611 static int __init dump_init(void)
1612 {
1613         int rc;
1614
1615         dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1616         if (!dump_kset)
1617                 return -ENOMEM;
1618         rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1619         if (rc) {
1620                 kset_unregister(dump_kset);
1621                 return rc;
1622         }
1623         rc = dump_ccw_init();
1624         if (rc)
1625                 return rc;
1626         rc = dump_fcp_init();
1627         if (rc)
1628                 return rc;
1629         rc = dump_nvme_init();
1630         if (rc)
1631                 return rc;
1632         dump_set_type(DUMP_TYPE_NONE);
1633         return 0;
1634 }
1635
1636 static struct shutdown_action __refdata dump_action = {
1637         .name   = SHUTDOWN_ACTION_DUMP_STR,
1638         .fn     = dump_run,
1639         .init   = dump_init,
1640 };
1641
1642 static void dump_reipl_run(struct shutdown_trigger *trigger)
1643 {
1644         unsigned long ipib = (unsigned long) reipl_block_actual;
1645         unsigned int csum;
1646
1647         csum = (__force unsigned int)
1648                csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
1649         mem_assign_absolute(S390_lowcore.ipib, ipib);
1650         mem_assign_absolute(S390_lowcore.ipib_checksum, csum);
1651         dump_run(trigger);
1652 }
1653
1654 static struct shutdown_action __refdata dump_reipl_action = {
1655         .name   = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1656         .fn     = dump_reipl_run,
1657 };
1658
1659 /*
1660  * vmcmd shutdown action: Trigger vm command on shutdown.
1661  */
1662
1663 static char vmcmd_on_reboot[128];
1664 static char vmcmd_on_panic[128];
1665 static char vmcmd_on_halt[128];
1666 static char vmcmd_on_poff[128];
1667 static char vmcmd_on_restart[128];
1668
1669 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1670 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1671 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1672 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1673 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1674
1675 static struct attribute *vmcmd_attrs[] = {
1676         &sys_vmcmd_on_reboot_attr.attr,
1677         &sys_vmcmd_on_panic_attr.attr,
1678         &sys_vmcmd_on_halt_attr.attr,
1679         &sys_vmcmd_on_poff_attr.attr,
1680         &sys_vmcmd_on_restart_attr.attr,
1681         NULL,
1682 };
1683
1684 static struct attribute_group vmcmd_attr_group = {
1685         .attrs = vmcmd_attrs,
1686 };
1687
1688 static struct kset *vmcmd_kset;
1689
1690 static void vmcmd_run(struct shutdown_trigger *trigger)
1691 {
1692         char *cmd;
1693
1694         if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1695                 cmd = vmcmd_on_reboot;
1696         else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1697                 cmd = vmcmd_on_panic;
1698         else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1699                 cmd = vmcmd_on_halt;
1700         else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1701                 cmd = vmcmd_on_poff;
1702         else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
1703                 cmd = vmcmd_on_restart;
1704         else
1705                 return;
1706
1707         if (strlen(cmd) == 0)
1708                 return;
1709         __cpcmd(cmd, NULL, 0, NULL);
1710 }
1711
1712 static int vmcmd_init(void)
1713 {
1714         if (!MACHINE_IS_VM)
1715                 return -EOPNOTSUPP;
1716         vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1717         if (!vmcmd_kset)
1718                 return -ENOMEM;
1719         return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1720 }
1721
1722 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1723                                               vmcmd_run, vmcmd_init};
1724
1725 /*
1726  * stop shutdown action: Stop Linux on shutdown.
1727  */
1728
1729 static void stop_run(struct shutdown_trigger *trigger)
1730 {
1731         if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
1732             strcmp(trigger->name, ON_RESTART_STR) == 0)
1733                 disabled_wait();
1734         smp_stop_cpu();
1735 }
1736
1737 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1738                                              stop_run, NULL};
1739
1740 /* action list */
1741
1742 static struct shutdown_action *shutdown_actions_list[] = {
1743         &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1744         &vmcmd_action, &stop_action};
1745 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1746
1747 /*
1748  * Trigger section
1749  */
1750
1751 static struct kset *shutdown_actions_kset;
1752
1753 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1754                        size_t len)
1755 {
1756         int i;
1757
1758         for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1759                 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1760                         if (shutdown_actions_list[i]->init_rc) {
1761                                 return shutdown_actions_list[i]->init_rc;
1762                         } else {
1763                                 trigger->action = shutdown_actions_list[i];
1764                                 return len;
1765                         }
1766                 }
1767         }
1768         return -EINVAL;
1769 }
1770
1771 /* on reipl */
1772
1773 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1774                                                     &reipl_action};
1775
1776 static ssize_t on_reboot_show(struct kobject *kobj,
1777                               struct kobj_attribute *attr, char *page)
1778 {
1779         return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1780 }
1781
1782 static ssize_t on_reboot_store(struct kobject *kobj,
1783                                struct kobj_attribute *attr,
1784                                const char *buf, size_t len)
1785 {
1786         return set_trigger(buf, &on_reboot_trigger, len);
1787 }
1788 static struct kobj_attribute on_reboot_attr = __ATTR_RW(on_reboot);
1789
1790 static void do_machine_restart(char *__unused)
1791 {
1792         smp_send_stop();
1793         on_reboot_trigger.action->fn(&on_reboot_trigger);
1794         reipl_run(NULL);
1795 }
1796 void (*_machine_restart)(char *command) = do_machine_restart;
1797
1798 /* on panic */
1799
1800 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1801
1802 static ssize_t on_panic_show(struct kobject *kobj,
1803                              struct kobj_attribute *attr, char *page)
1804 {
1805         return sprintf(page, "%s\n", on_panic_trigger.action->name);
1806 }
1807
1808 static ssize_t on_panic_store(struct kobject *kobj,
1809                               struct kobj_attribute *attr,
1810                               const char *buf, size_t len)
1811 {
1812         return set_trigger(buf, &on_panic_trigger, len);
1813 }
1814 static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic);
1815
1816 static void do_panic(void)
1817 {
1818         lgr_info_log();
1819         on_panic_trigger.action->fn(&on_panic_trigger);
1820         stop_run(&on_panic_trigger);
1821 }
1822
1823 /* on restart */
1824
1825 static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
1826         &stop_action};
1827
1828 static ssize_t on_restart_show(struct kobject *kobj,
1829                                struct kobj_attribute *attr, char *page)
1830 {
1831         return sprintf(page, "%s\n", on_restart_trigger.action->name);
1832 }
1833
1834 static ssize_t on_restart_store(struct kobject *kobj,
1835                                 struct kobj_attribute *attr,
1836                                 const char *buf, size_t len)
1837 {
1838         return set_trigger(buf, &on_restart_trigger, len);
1839 }
1840 static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart);
1841
1842 static void __do_restart(void *ignore)
1843 {
1844         smp_send_stop();
1845 #ifdef CONFIG_CRASH_DUMP
1846         crash_kexec(NULL);
1847 #endif
1848         on_restart_trigger.action->fn(&on_restart_trigger);
1849         stop_run(&on_restart_trigger);
1850 }
1851
1852 void do_restart(void *arg)
1853 {
1854         tracing_off();
1855         debug_locks_off();
1856         lgr_info_log();
1857         smp_call_online_cpu(__do_restart, arg);
1858 }
1859
1860 /* on halt */
1861
1862 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1863
1864 static ssize_t on_halt_show(struct kobject *kobj,
1865                             struct kobj_attribute *attr, char *page)
1866 {
1867         return sprintf(page, "%s\n", on_halt_trigger.action->name);
1868 }
1869
1870 static ssize_t on_halt_store(struct kobject *kobj,
1871                              struct kobj_attribute *attr,
1872                              const char *buf, size_t len)
1873 {
1874         return set_trigger(buf, &on_halt_trigger, len);
1875 }
1876 static struct kobj_attribute on_halt_attr = __ATTR_RW(on_halt);
1877
1878 static void do_machine_halt(void)
1879 {
1880         smp_send_stop();
1881         on_halt_trigger.action->fn(&on_halt_trigger);
1882         stop_run(&on_halt_trigger);
1883 }
1884 void (*_machine_halt)(void) = do_machine_halt;
1885
1886 /* on power off */
1887
1888 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1889
1890 static ssize_t on_poff_show(struct kobject *kobj,
1891                             struct kobj_attribute *attr, char *page)
1892 {
1893         return sprintf(page, "%s\n", on_poff_trigger.action->name);
1894 }
1895
1896 static ssize_t on_poff_store(struct kobject *kobj,
1897                              struct kobj_attribute *attr,
1898                              const char *buf, size_t len)
1899 {
1900         return set_trigger(buf, &on_poff_trigger, len);
1901 }
1902 static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff);
1903
1904 static void do_machine_power_off(void)
1905 {
1906         smp_send_stop();
1907         on_poff_trigger.action->fn(&on_poff_trigger);
1908         stop_run(&on_poff_trigger);
1909 }
1910 void (*_machine_power_off)(void) = do_machine_power_off;
1911
1912 static struct attribute *shutdown_action_attrs[] = {
1913         &on_restart_attr.attr,
1914         &on_reboot_attr.attr,
1915         &on_panic_attr.attr,
1916         &on_halt_attr.attr,
1917         &on_poff_attr.attr,
1918         NULL,
1919 };
1920
1921 static struct attribute_group shutdown_action_attr_group = {
1922         .attrs = shutdown_action_attrs,
1923 };
1924
1925 static void __init shutdown_triggers_init(void)
1926 {
1927         shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1928                                                     firmware_kobj);
1929         if (!shutdown_actions_kset)
1930                 goto fail;
1931         if (sysfs_create_group(&shutdown_actions_kset->kobj,
1932                                &shutdown_action_attr_group))
1933                 goto fail;
1934         return;
1935 fail:
1936         panic("shutdown_triggers_init failed\n");
1937 }
1938
1939 static void __init shutdown_actions_init(void)
1940 {
1941         int i;
1942
1943         for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1944                 if (!shutdown_actions_list[i]->init)
1945                         continue;
1946                 shutdown_actions_list[i]->init_rc =
1947                         shutdown_actions_list[i]->init();
1948         }
1949 }
1950
1951 static int __init s390_ipl_init(void)
1952 {
1953         char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40};
1954
1955         sclp_early_get_ipl_info(&sclp_ipl_info);
1956         /*
1957          * Fix loadparm: There are systems where the (SCSI) LOADPARM
1958          * returned by read SCP info is invalid (contains EBCDIC blanks)
1959          * when the system has been booted via diag308. In that case we use
1960          * the value from diag308, if available.
1961          *
1962          * There are also systems where diag308 store does not work in
1963          * case the system is booted from HMC. Fortunately in this case
1964          * READ SCP info provides the correct value.
1965          */
1966         if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 && ipl_block_valid)
1967                 memcpy(sclp_ipl_info.loadparm, ipl_block.ccw.loadparm, LOADPARM_LEN);
1968         shutdown_actions_init();
1969         shutdown_triggers_init();
1970         return 0;
1971 }
1972
1973 __initcall(s390_ipl_init);
1974
1975 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1976 {
1977         int sx, dx;
1978
1979         dx = 0;
1980         for (sx = 0; src[sx] != 0; sx++) {
1981                 if (src[sx] == '"')
1982                         continue;
1983                 dst[dx++] = src[sx];
1984                 if (dx >= n)
1985                         break;
1986         }
1987 }
1988
1989 static int __init vmcmd_on_reboot_setup(char *str)
1990 {
1991         if (!MACHINE_IS_VM)
1992                 return 1;
1993         strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1994         vmcmd_on_reboot[127] = 0;
1995         on_reboot_trigger.action = &vmcmd_action;
1996         return 1;
1997 }
1998 __setup("vmreboot=", vmcmd_on_reboot_setup);
1999
2000 static int __init vmcmd_on_panic_setup(char *str)
2001 {
2002         if (!MACHINE_IS_VM)
2003                 return 1;
2004         strncpy_skip_quote(vmcmd_on_panic, str, 127);
2005         vmcmd_on_panic[127] = 0;
2006         on_panic_trigger.action = &vmcmd_action;
2007         return 1;
2008 }
2009 __setup("vmpanic=", vmcmd_on_panic_setup);
2010
2011 static int __init vmcmd_on_halt_setup(char *str)
2012 {
2013         if (!MACHINE_IS_VM)
2014                 return 1;
2015         strncpy_skip_quote(vmcmd_on_halt, str, 127);
2016         vmcmd_on_halt[127] = 0;
2017         on_halt_trigger.action = &vmcmd_action;
2018         return 1;
2019 }
2020 __setup("vmhalt=", vmcmd_on_halt_setup);
2021
2022 static int __init vmcmd_on_poff_setup(char *str)
2023 {
2024         if (!MACHINE_IS_VM)
2025                 return 1;
2026         strncpy_skip_quote(vmcmd_on_poff, str, 127);
2027         vmcmd_on_poff[127] = 0;
2028         on_poff_trigger.action = &vmcmd_action;
2029         return 1;
2030 }
2031 __setup("vmpoff=", vmcmd_on_poff_setup);
2032
2033 static int on_panic_notify(struct notifier_block *self,
2034                            unsigned long event, void *data)
2035 {
2036         do_panic();
2037         return NOTIFY_OK;
2038 }
2039
2040 static struct notifier_block on_panic_nb = {
2041         .notifier_call = on_panic_notify,
2042         .priority = INT_MIN,
2043 };
2044
2045 void __init setup_ipl(void)
2046 {
2047         BUILD_BUG_ON(sizeof(struct ipl_parameter_block) != PAGE_SIZE);
2048
2049         ipl_info.type = get_ipl_type();
2050         switch (ipl_info.type) {
2051         case IPL_TYPE_CCW:
2052                 ipl_info.data.ccw.dev_id.ssid = ipl_block.ccw.ssid;
2053                 ipl_info.data.ccw.dev_id.devno = ipl_block.ccw.devno;
2054                 break;
2055         case IPL_TYPE_FCP:
2056         case IPL_TYPE_FCP_DUMP:
2057                 ipl_info.data.fcp.dev_id.ssid = 0;
2058                 ipl_info.data.fcp.dev_id.devno = ipl_block.fcp.devno;
2059                 ipl_info.data.fcp.wwpn = ipl_block.fcp.wwpn;
2060                 ipl_info.data.fcp.lun = ipl_block.fcp.lun;
2061                 break;
2062         case IPL_TYPE_NVME:
2063         case IPL_TYPE_NVME_DUMP:
2064                 ipl_info.data.nvme.fid = ipl_block.nvme.fid;
2065                 ipl_info.data.nvme.nsid = ipl_block.nvme.nsid;
2066                 break;
2067         case IPL_TYPE_NSS:
2068         case IPL_TYPE_UNKNOWN:
2069                 /* We have no info to copy */
2070                 break;
2071         }
2072         atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
2073 }
2074
2075 void s390_reset_system(void)
2076 {
2077         /* Disable prefixing */
2078         set_prefix(0);
2079
2080         /* Disable lowcore protection */
2081         __ctl_clear_bit(0, 28);
2082         diag_amode31_ops.diag308_reset();
2083 }
2084
2085 #ifdef CONFIG_KEXEC_FILE
2086
2087 int ipl_report_add_component(struct ipl_report *report, struct kexec_buf *kbuf,
2088                              unsigned char flags, unsigned short cert)
2089 {
2090         struct ipl_report_component *comp;
2091
2092         comp = vzalloc(sizeof(*comp));
2093         if (!comp)
2094                 return -ENOMEM;
2095         list_add_tail(&comp->list, &report->components);
2096
2097         comp->entry.addr = kbuf->mem;
2098         comp->entry.len = kbuf->memsz;
2099         comp->entry.flags = flags;
2100         comp->entry.certificate_index = cert;
2101
2102         report->size += sizeof(comp->entry);
2103
2104         return 0;
2105 }
2106
2107 int ipl_report_add_certificate(struct ipl_report *report, void *key,
2108                                unsigned long addr, unsigned long len)
2109 {
2110         struct ipl_report_certificate *cert;
2111
2112         cert = vzalloc(sizeof(*cert));
2113         if (!cert)
2114                 return -ENOMEM;
2115         list_add_tail(&cert->list, &report->certificates);
2116
2117         cert->entry.addr = addr;
2118         cert->entry.len = len;
2119         cert->key = key;
2120
2121         report->size += sizeof(cert->entry);
2122         report->size += cert->entry.len;
2123
2124         return 0;
2125 }
2126
2127 struct ipl_report *ipl_report_init(struct ipl_parameter_block *ipib)
2128 {
2129         struct ipl_report *report;
2130
2131         report = vzalloc(sizeof(*report));
2132         if (!report)
2133                 return ERR_PTR(-ENOMEM);
2134
2135         report->ipib = ipib;
2136         INIT_LIST_HEAD(&report->components);
2137         INIT_LIST_HEAD(&report->certificates);
2138
2139         report->size = ALIGN(ipib->hdr.len, 8);
2140         report->size += sizeof(struct ipl_rl_hdr);
2141         report->size += sizeof(struct ipl_rb_components);
2142         report->size += sizeof(struct ipl_rb_certificates);
2143
2144         return report;
2145 }
2146
2147 void *ipl_report_finish(struct ipl_report *report)
2148 {
2149         struct ipl_report_certificate *cert;
2150         struct ipl_report_component *comp;
2151         struct ipl_rb_certificates *certs;
2152         struct ipl_parameter_block *ipib;
2153         struct ipl_rb_components *comps;
2154         struct ipl_rl_hdr *rl_hdr;
2155         void *buf, *ptr;
2156
2157         buf = vzalloc(report->size);
2158         if (!buf)
2159                 goto out;
2160         ptr = buf;
2161
2162         memcpy(ptr, report->ipib, report->ipib->hdr.len);
2163         ipib = ptr;
2164         if (ipl_secure_flag)
2165                 ipib->hdr.flags |= IPL_PL_FLAG_SIPL;
2166         ipib->hdr.flags |= IPL_PL_FLAG_IPLSR;
2167         ptr += report->ipib->hdr.len;
2168         ptr = PTR_ALIGN(ptr, 8);
2169
2170         rl_hdr = ptr;
2171         ptr += sizeof(*rl_hdr);
2172
2173         comps = ptr;
2174         comps->rbt = IPL_RBT_COMPONENTS;
2175         ptr += sizeof(*comps);
2176         list_for_each_entry(comp, &report->components, list) {
2177                 memcpy(ptr, &comp->entry, sizeof(comp->entry));
2178                 ptr += sizeof(comp->entry);
2179         }
2180         comps->len = ptr - (void *)comps;
2181
2182         certs = ptr;
2183         certs->rbt = IPL_RBT_CERTIFICATES;
2184         ptr += sizeof(*certs);
2185         list_for_each_entry(cert, &report->certificates, list) {
2186                 memcpy(ptr, &cert->entry, sizeof(cert->entry));
2187                 ptr += sizeof(cert->entry);
2188         }
2189         certs->len = ptr - (void *)certs;
2190         rl_hdr->len = ptr - (void *)rl_hdr;
2191
2192         list_for_each_entry(cert, &report->certificates, list) {
2193                 memcpy(ptr, cert->key, cert->entry.len);
2194                 ptr += cert->entry.len;
2195         }
2196
2197         BUG_ON(ptr > buf + report->size);
2198 out:
2199         return buf;
2200 }
2201
2202 int ipl_report_free(struct ipl_report *report)
2203 {
2204         struct ipl_report_component *comp, *ncomp;
2205         struct ipl_report_certificate *cert, *ncert;
2206
2207         list_for_each_entry_safe(comp, ncomp, &report->components, list)
2208                 vfree(comp);
2209
2210         list_for_each_entry_safe(cert, ncert, &report->certificates, list)
2211                 vfree(cert);
2212
2213         vfree(report);
2214
2215         return 0;
2216 }
2217
2218 #endif