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 <holzheu@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/kstrtox.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/asm-extable.h>
  24#include <asm/diag.h>
  25#include <asm/ipl.h>
  26#include <asm/smp.h>
  27#include <asm/setup.h>
  28#include <asm/cpcmd.h>
  29#include <asm/ebcdic.h>
  30#include <asm/sclp.h>
  31#include <asm/checksum.h>
  32#include <asm/debug.h>
  33#include <asm/abs_lowcore.h>
  34#include <asm/os_info.h>
  35#include <asm/sections.h>
  36#include <asm/boot_data.h>
  37#include "entry.h"
  38
  39#define IPL_PARM_BLOCK_VERSION 0
  40
  41#define IPL_UNKNOWN_STR		"unknown"
  42#define IPL_CCW_STR		"ccw"
  43#define IPL_ECKD_STR		"eckd"
  44#define IPL_ECKD_DUMP_STR	"eckd_dump"
  45#define IPL_FCP_STR		"fcp"
  46#define IPL_FCP_DUMP_STR	"fcp_dump"
  47#define IPL_NVME_STR		"nvme"
  48#define IPL_NVME_DUMP_STR	"nvme_dump"
  49#define IPL_NSS_STR		"nss"
  50
  51#define DUMP_CCW_STR		"ccw"
  52#define DUMP_ECKD_STR		"eckd"
  53#define DUMP_FCP_STR		"fcp"
  54#define DUMP_NVME_STR		"nvme"
  55#define DUMP_NONE_STR		"none"
  56
  57/*
  58 * Four shutdown trigger types are supported:
  59 * - panic
  60 * - halt
  61 * - power off
  62 * - reipl
  63 * - restart
  64 */
  65#define ON_PANIC_STR		"on_panic"
  66#define ON_HALT_STR		"on_halt"
  67#define ON_POFF_STR		"on_poff"
  68#define ON_REIPL_STR		"on_reboot"
  69#define ON_RESTART_STR		"on_restart"
  70
  71struct shutdown_action;
  72struct shutdown_trigger {
  73	char *name;
  74	struct shutdown_action *action;
  75};
  76
  77/*
  78 * The following shutdown action types are supported:
  79 */
  80#define SHUTDOWN_ACTION_IPL_STR		"ipl"
  81#define SHUTDOWN_ACTION_REIPL_STR	"reipl"
  82#define SHUTDOWN_ACTION_DUMP_STR	"dump"
  83#define SHUTDOWN_ACTION_VMCMD_STR	"vmcmd"
  84#define SHUTDOWN_ACTION_STOP_STR	"stop"
  85#define SHUTDOWN_ACTION_DUMP_REIPL_STR	"dump_reipl"
  86
  87struct shutdown_action {
  88	char *name;
  89	void (*fn) (struct shutdown_trigger *trigger);
  90	int (*init) (void);
  91	int init_rc;
  92};
  93
  94static char *ipl_type_str(enum ipl_type type)
  95{
  96	switch (type) {
  97	case IPL_TYPE_CCW:
  98		return IPL_CCW_STR;
  99	case IPL_TYPE_ECKD:
 100		return IPL_ECKD_STR;
 101	case IPL_TYPE_ECKD_DUMP:
 102		return IPL_ECKD_DUMP_STR;
 103	case IPL_TYPE_FCP:
 104		return IPL_FCP_STR;
 105	case IPL_TYPE_FCP_DUMP:
 106		return IPL_FCP_DUMP_STR;
 107	case IPL_TYPE_NSS:
 108		return IPL_NSS_STR;
 109	case IPL_TYPE_NVME:
 110		return IPL_NVME_STR;
 111	case IPL_TYPE_NVME_DUMP:
 112		return IPL_NVME_DUMP_STR;
 113	case IPL_TYPE_UNKNOWN:
 114	default:
 115		return IPL_UNKNOWN_STR;
 116	}
 117}
 118
 119enum dump_type {
 120	DUMP_TYPE_NONE	= 1,
 121	DUMP_TYPE_CCW	= 2,
 122	DUMP_TYPE_FCP	= 4,
 123	DUMP_TYPE_NVME	= 8,
 124	DUMP_TYPE_ECKD	= 16,
 125};
 126
 127static char *dump_type_str(enum dump_type type)
 128{
 129	switch (type) {
 130	case DUMP_TYPE_NONE:
 131		return DUMP_NONE_STR;
 132	case DUMP_TYPE_CCW:
 133		return DUMP_CCW_STR;
 134	case DUMP_TYPE_ECKD:
 135		return DUMP_ECKD_STR;
 136	case DUMP_TYPE_FCP:
 137		return DUMP_FCP_STR;
 138	case DUMP_TYPE_NVME:
 139		return DUMP_NVME_STR;
 140	default:
 141		return NULL;
 142	}
 143}
 144
 145int __bootdata_preserved(ipl_block_valid);
 146struct ipl_parameter_block __bootdata_preserved(ipl_block);
 147int __bootdata_preserved(ipl_secure_flag);
 148
 149unsigned long __bootdata_preserved(ipl_cert_list_addr);
 150unsigned long __bootdata_preserved(ipl_cert_list_size);
 151
 152unsigned long __bootdata(early_ipl_comp_list_addr);
 153unsigned long __bootdata(early_ipl_comp_list_size);
 154
 155static int reipl_capabilities = IPL_TYPE_UNKNOWN;
 156
 157static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
 158static struct ipl_parameter_block *reipl_block_fcp;
 159static struct ipl_parameter_block *reipl_block_nvme;
 160static struct ipl_parameter_block *reipl_block_ccw;
 161static struct ipl_parameter_block *reipl_block_eckd;
 162static struct ipl_parameter_block *reipl_block_nss;
 163static struct ipl_parameter_block *reipl_block_actual;
 164
 165static int dump_capabilities = DUMP_TYPE_NONE;
 166static enum dump_type dump_type = DUMP_TYPE_NONE;
 167static struct ipl_parameter_block *dump_block_fcp;
 168static struct ipl_parameter_block *dump_block_nvme;
 169static struct ipl_parameter_block *dump_block_ccw;
 170static struct ipl_parameter_block *dump_block_eckd;
 171
 172static struct sclp_ipl_info sclp_ipl_info;
 173
 174static bool reipl_nvme_clear;
 175static bool reipl_fcp_clear;
 176static bool reipl_ccw_clear;
 177static bool reipl_eckd_clear;
 178
 179static inline int __diag308(unsigned long subcode, void *addr)
 180{
 181	union register_pair r1;
 182
 183	r1.even = (unsigned long) addr;
 184	r1.odd	= 0;
 185	asm volatile(
 186		"	diag	%[r1],%[subcode],0x308\n"
 187		"0:	nopr	%%r7\n"
 188		EX_TABLE(0b,0b)
 189		: [r1] "+&d" (r1.pair)
 190		: [subcode] "d" (subcode)
 191		: "cc", "memory");
 192	return r1.odd;
 193}
 194
 195int diag308(unsigned long subcode, void *addr)
 196{
 197	diag_stat_inc(DIAG_STAT_X308);
 198	return __diag308(subcode, addr);
 199}
 200EXPORT_SYMBOL_GPL(diag308);
 201
 202/* SYSFS */
 203
 204#define IPL_ATTR_SHOW_FN(_prefix, _name, _format, args...)		\
 205static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,	\
 206		struct kobj_attribute *attr,				\
 207		char *page)						\
 208{									\
 209	return scnprintf(page, PAGE_SIZE, _format, ##args);		\
 210}
 211
 212#define IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk)			\
 213static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,	\
 214		struct kobj_attribute *attr,				\
 215		const char *buf, size_t len)				\
 216{									\
 217	unsigned long long ssid, devno;					\
 218									\
 219	if (sscanf(buf, "0.%llx.%llx\n", &ssid, &devno) != 2)		\
 220		return -EINVAL;						\
 221									\
 222	if (ssid > __MAX_SSID || devno > __MAX_SUBCHANNEL)		\
 223		return -EINVAL;						\
 224									\
 225	_ipl_blk.ssid = ssid;						\
 226	_ipl_blk.devno = devno;						\
 227	return len;							\
 228}
 229
 230#define DEFINE_IPL_CCW_ATTR_RW(_prefix, _name, _ipl_blk)		\
 231IPL_ATTR_SHOW_FN(_prefix, _name, "0.%x.%04x\n",				\
 232		 _ipl_blk.ssid, _ipl_blk.devno);			\
 233IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk);			\
 234static struct kobj_attribute sys_##_prefix##_##_name##_attr =		\
 235	__ATTR(_name, 0644,						\
 236	       sys_##_prefix##_##_name##_show,				\
 237	       sys_##_prefix##_##_name##_store)				\
 238
 239#define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value)		\
 240IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value)			\
 241static struct kobj_attribute sys_##_prefix##_##_name##_attr =		\
 242	__ATTR(_name, 0444, sys_##_prefix##_##_name##_show, NULL)
 243
 244#define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)	\
 245IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value)	\
 246static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,	\
 247		struct kobj_attribute *attr,				\
 248		const char *buf, size_t len)				\
 249{									\
 250	unsigned long long value;					\
 251	if (sscanf(buf, _fmt_in, &value) != 1)				\
 252		return -EINVAL;						\
 253	_value = value;							\
 254	return len;							\
 255}									\
 256static struct kobj_attribute sys_##_prefix##_##_name##_attr =		\
 257	__ATTR(_name, 0644,						\
 258			sys_##_prefix##_##_name##_show,			\
 259			sys_##_prefix##_##_name##_store)
 260
 261#define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
 262IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, _value)			\
 263static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,	\
 264		struct kobj_attribute *attr,				\
 265		const char *buf, size_t len)				\
 266{									\
 267	strncpy(_value, buf, sizeof(_value) - 1);			\
 268	strim(_value);							\
 269	return len;							\
 270}									\
 271static struct kobj_attribute sys_##_prefix##_##_name##_attr =		\
 272	__ATTR(_name, 0644,						\
 273			sys_##_prefix##_##_name##_show,			\
 274			sys_##_prefix##_##_name##_store)
 275
 276/*
 277 * ipl section
 278 */
 279
 280static __init enum ipl_type get_ipl_type(void)
 281{
 282	if (!ipl_block_valid)
 283		return IPL_TYPE_UNKNOWN;
 284
 285	switch (ipl_block.pb0_hdr.pbt) {
 286	case IPL_PBT_CCW:
 287		return IPL_TYPE_CCW;
 288	case IPL_PBT_FCP:
 289		if (ipl_block.fcp.opt == IPL_PB0_FCP_OPT_DUMP)
 290			return IPL_TYPE_FCP_DUMP;
 291		else
 292			return IPL_TYPE_FCP;
 293	case IPL_PBT_NVME:
 294		if (ipl_block.nvme.opt == IPL_PB0_NVME_OPT_DUMP)
 295			return IPL_TYPE_NVME_DUMP;
 296		else
 297			return IPL_TYPE_NVME;
 298	case IPL_PBT_ECKD:
 299		if (ipl_block.eckd.opt == IPL_PB0_ECKD_OPT_DUMP)
 300			return IPL_TYPE_ECKD_DUMP;
 301		else
 302			return IPL_TYPE_ECKD;
 303	}
 304	return IPL_TYPE_UNKNOWN;
 305}
 306
 307struct ipl_info ipl_info;
 308EXPORT_SYMBOL_GPL(ipl_info);
 309
 310static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
 311			     char *page)
 312{
 313	return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
 314}
 315
 316static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
 317
 318static ssize_t ipl_secure_show(struct kobject *kobj,
 319			       struct kobj_attribute *attr, char *page)
 320{
 321	return sprintf(page, "%i\n", !!ipl_secure_flag);
 322}
 323
 324static struct kobj_attribute sys_ipl_secure_attr =
 325	__ATTR(secure, 0444, ipl_secure_show, NULL);
 326
 327static ssize_t ipl_has_secure_show(struct kobject *kobj,
 328				   struct kobj_attribute *attr, char *page)
 329{
 330	return sprintf(page, "%i\n", !!sclp.has_sipl);
 331}
 332
 333static struct kobj_attribute sys_ipl_has_secure_attr =
 334	__ATTR(has_secure, 0444, ipl_has_secure_show, NULL);
 335
 336static ssize_t ipl_vm_parm_show(struct kobject *kobj,
 337				struct kobj_attribute *attr, char *page)
 338{
 339	char parm[DIAG308_VMPARM_SIZE + 1] = {};
 340
 341	if (ipl_block_valid && (ipl_block.pb0_hdr.pbt == IPL_PBT_CCW))
 342		ipl_block_get_ascii_vmparm(parm, sizeof(parm), &ipl_block);
 343	return sprintf(page, "%s\n", parm);
 344}
 345
 346static struct kobj_attribute sys_ipl_vm_parm_attr =
 347	__ATTR(parm, 0444, ipl_vm_parm_show, NULL);
 348
 349static ssize_t sys_ipl_device_show(struct kobject *kobj,
 350				   struct kobj_attribute *attr, char *page)
 351{
 352	switch (ipl_info.type) {
 353	case IPL_TYPE_CCW:
 354		return sprintf(page, "0.%x.%04x\n", ipl_block.ccw.ssid,
 355			       ipl_block.ccw.devno);
 356	case IPL_TYPE_ECKD:
 357	case IPL_TYPE_ECKD_DUMP:
 358		return sprintf(page, "0.%x.%04x\n", ipl_block.eckd.ssid,
 359			       ipl_block.eckd.devno);
 360	case IPL_TYPE_FCP:
 361	case IPL_TYPE_FCP_DUMP:
 362		return sprintf(page, "0.0.%04x\n", ipl_block.fcp.devno);
 363	case IPL_TYPE_NVME:
 364	case IPL_TYPE_NVME_DUMP:
 365		return sprintf(page, "%08ux\n", ipl_block.nvme.fid);
 366	default:
 367		return 0;
 368	}
 369}
 370
 371static struct kobj_attribute sys_ipl_device_attr =
 372	__ATTR(device, 0444, sys_ipl_device_show, NULL);
 373
 374static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
 375				  struct bin_attribute *attr, char *buf,
 376				  loff_t off, size_t count)
 377{
 378	return memory_read_from_buffer(buf, count, &off, &ipl_block,
 379				       ipl_block.hdr.len);
 380}
 381static struct bin_attribute ipl_parameter_attr =
 382	__BIN_ATTR(binary_parameter, 0444, ipl_parameter_read, NULL,
 383		   PAGE_SIZE);
 384
 385static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
 386				 struct bin_attribute *attr, char *buf,
 387				 loff_t off, size_t count)
 388{
 389	unsigned int size = ipl_block.fcp.scp_data_len;
 390	void *scp_data = &ipl_block.fcp.scp_data;
 391
 392	return memory_read_from_buffer(buf, count, &off, scp_data, size);
 393}
 394
 395static ssize_t ipl_nvme_scp_data_read(struct file *filp, struct kobject *kobj,
 396				 struct bin_attribute *attr, char *buf,
 397				 loff_t off, size_t count)
 398{
 399	unsigned int size = ipl_block.nvme.scp_data_len;
 400	void *scp_data = &ipl_block.nvme.scp_data;
 401
 402	return memory_read_from_buffer(buf, count, &off, scp_data, size);
 403}
 404
 405static ssize_t ipl_eckd_scp_data_read(struct file *filp, struct kobject *kobj,
 406				      struct bin_attribute *attr, char *buf,
 407				      loff_t off, size_t count)
 408{
 409	unsigned int size = ipl_block.eckd.scp_data_len;
 410	void *scp_data = &ipl_block.eckd.scp_data;
 411
 412	return memory_read_from_buffer(buf, count, &off, scp_data, size);
 413}
 414
 415static struct bin_attribute ipl_scp_data_attr =
 416	__BIN_ATTR(scp_data, 0444, ipl_scp_data_read, NULL, PAGE_SIZE);
 417
 418static struct bin_attribute ipl_nvme_scp_data_attr =
 419	__BIN_ATTR(scp_data, 0444, ipl_nvme_scp_data_read, NULL, PAGE_SIZE);
 420
 421static struct bin_attribute ipl_eckd_scp_data_attr =
 422	__BIN_ATTR(scp_data, 0444, ipl_eckd_scp_data_read, NULL, PAGE_SIZE);
 423
 424static struct bin_attribute *ipl_fcp_bin_attrs[] = {
 425	&ipl_parameter_attr,
 426	&ipl_scp_data_attr,
 427	NULL,
 428};
 429
 430static struct bin_attribute *ipl_nvme_bin_attrs[] = {
 431	&ipl_parameter_attr,
 432	&ipl_nvme_scp_data_attr,
 433	NULL,
 434};
 435
 436static struct bin_attribute *ipl_eckd_bin_attrs[] = {
 437	&ipl_parameter_attr,
 438	&ipl_eckd_scp_data_attr,
 439	NULL,
 440};
 441
 442/* FCP ipl device attributes */
 443
 444DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n",
 445		   (unsigned long long)ipl_block.fcp.wwpn);
 446DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n",
 447		   (unsigned long long)ipl_block.fcp.lun);
 448DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n",
 449		   (unsigned long long)ipl_block.fcp.bootprog);
 450DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n",
 451		   (unsigned long long)ipl_block.fcp.br_lba);
 452
 453/* NVMe ipl device attributes */
 454DEFINE_IPL_ATTR_RO(ipl_nvme, fid, "0x%08llx\n",
 455		   (unsigned long long)ipl_block.nvme.fid);
 456DEFINE_IPL_ATTR_RO(ipl_nvme, nsid, "0x%08llx\n",
 457		   (unsigned long long)ipl_block.nvme.nsid);
 458DEFINE_IPL_ATTR_RO(ipl_nvme, bootprog, "%lld\n",
 459		   (unsigned long long)ipl_block.nvme.bootprog);
 460DEFINE_IPL_ATTR_RO(ipl_nvme, br_lba, "%lld\n",
 461		   (unsigned long long)ipl_block.nvme.br_lba);
 462
 463/* ECKD ipl device attributes */
 464DEFINE_IPL_ATTR_RO(ipl_eckd, bootprog, "%lld\n",
 465		   (unsigned long long)ipl_block.eckd.bootprog);
 466
 467#define IPL_ATTR_BR_CHR_SHOW_FN(_name, _ipb)				\
 468static ssize_t eckd_##_name##_br_chr_show(struct kobject *kobj,		\
 469					  struct kobj_attribute *attr,	\
 470					  char *buf)			\
 471{									\
 472	struct ipl_pb0_eckd *ipb = &(_ipb);				\
 473									\
 474	if (!ipb->br_chr.cyl &&						\
 475	    !ipb->br_chr.head &&					\
 476	    !ipb->br_chr.record)					\
 477		return sprintf(buf, "auto\n");				\
 478									\
 479	return sprintf(buf, "0x%x,0x%x,0x%x\n",				\
 480			ipb->br_chr.cyl,				\
 481			ipb->br_chr.head,				\
 482			ipb->br_chr.record);				\
 483}
 484
 485#define IPL_ATTR_BR_CHR_STORE_FN(_name, _ipb)				\
 486static ssize_t eckd_##_name##_br_chr_store(struct kobject *kobj,	\
 487					   struct kobj_attribute *attr,	\
 488					   const char *buf, size_t len)	\
 489{									\
 490	struct ipl_pb0_eckd *ipb = &(_ipb);				\
 491	unsigned long args[3] = { 0 };					\
 492	char *p, *p1, *tmp = NULL;					\
 493	int i, rc;							\
 494									\
 495	if (!strncmp(buf, "auto", 4))					\
 496		goto out;						\
 497									\
 498	tmp = kstrdup(buf, GFP_KERNEL);					\
 499	p = tmp;							\
 500	for (i = 0; i < 3; i++) {					\
 501		p1 = strsep(&p, ", ");					\
 502		if (!p1) {						\
 503			rc = -EINVAL;					\
 504			goto err;					\
 505		}							\
 506		rc = kstrtoul(p1, 0, args + i);				\
 507		if (rc)							\
 508			goto err;					\
 509	}								\
 510									\
 511	rc = -EINVAL;							\
 512	if (i != 3)							\
 513		goto err;						\
 514									\
 515	if ((args[0] || args[1]) && !args[2])				\
 516		goto err;						\
 517									\
 518	if (args[0] > UINT_MAX || args[1] > 255 || args[2] > 255)	\
 519		goto err;						\
 520									\
 521out:									\
 522	ipb->br_chr.cyl = args[0];					\
 523	ipb->br_chr.head = args[1];					\
 524	ipb->br_chr.record = args[2];					\
 525	rc = len;							\
 526err:									\
 527	kfree(tmp);							\
 528	return rc;							\
 529}
 530
 531IPL_ATTR_BR_CHR_SHOW_FN(ipl, ipl_block.eckd);
 532static struct kobj_attribute sys_ipl_eckd_br_chr_attr =
 533	__ATTR(br_chr, 0644, eckd_ipl_br_chr_show, NULL);
 534
 535IPL_ATTR_BR_CHR_SHOW_FN(reipl, reipl_block_eckd->eckd);
 536IPL_ATTR_BR_CHR_STORE_FN(reipl, reipl_block_eckd->eckd);
 537
 538static struct kobj_attribute sys_reipl_eckd_br_chr_attr =
 539	__ATTR(br_chr, 0644, eckd_reipl_br_chr_show, eckd_reipl_br_chr_store);
 540
 541static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
 542				     struct kobj_attribute *attr, char *page)
 543{
 544	char loadparm[LOADPARM_LEN + 1] = {};
 545
 546	if (!sclp_ipl_info.is_valid)
 547		return sprintf(page, "#unknown#\n");
 548	memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
 549	EBCASC(loadparm, LOADPARM_LEN);
 550	strim(loadparm);
 551	return sprintf(page, "%s\n", loadparm);
 552}
 553
 554static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
 555	__ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
 556
 557static struct attribute *ipl_fcp_attrs[] = {
 558	&sys_ipl_type_attr.attr,
 559	&sys_ipl_device_attr.attr,
 560	&sys_ipl_fcp_wwpn_attr.attr,
 561	&sys_ipl_fcp_lun_attr.attr,
 562	&sys_ipl_fcp_bootprog_attr.attr,
 563	&sys_ipl_fcp_br_lba_attr.attr,
 564	&sys_ipl_ccw_loadparm_attr.attr,
 565	&sys_ipl_secure_attr.attr,
 566	&sys_ipl_has_secure_attr.attr,
 567	NULL,
 568};
 569
 570static struct attribute_group ipl_fcp_attr_group = {
 571	.attrs = ipl_fcp_attrs,
 572	.bin_attrs = ipl_fcp_bin_attrs,
 573};
 574
 575static struct attribute *ipl_nvme_attrs[] = {
 576	&sys_ipl_type_attr.attr,
 577	&sys_ipl_nvme_fid_attr.attr,
 578	&sys_ipl_nvme_nsid_attr.attr,
 579	&sys_ipl_nvme_bootprog_attr.attr,
 580	&sys_ipl_nvme_br_lba_attr.attr,
 581	&sys_ipl_ccw_loadparm_attr.attr,
 582	&sys_ipl_secure_attr.attr,
 583	&sys_ipl_has_secure_attr.attr,
 584	NULL,
 585};
 586
 587static struct attribute_group ipl_nvme_attr_group = {
 588	.attrs = ipl_nvme_attrs,
 589	.bin_attrs = ipl_nvme_bin_attrs,
 590};
 591
 592static struct attribute *ipl_eckd_attrs[] = {
 593	&sys_ipl_type_attr.attr,
 594	&sys_ipl_eckd_bootprog_attr.attr,
 595	&sys_ipl_eckd_br_chr_attr.attr,
 596	&sys_ipl_device_attr.attr,
 597	&sys_ipl_secure_attr.attr,
 598	&sys_ipl_has_secure_attr.attr,
 599	NULL,
 600};
 601
 602static struct attribute_group ipl_eckd_attr_group = {
 603	.attrs = ipl_eckd_attrs,
 604	.bin_attrs = ipl_eckd_bin_attrs,
 605};
 606
 607/* CCW ipl device attributes */
 608
 609static struct attribute *ipl_ccw_attrs_vm[] = {
 610	&sys_ipl_type_attr.attr,
 611	&sys_ipl_device_attr.attr,
 612	&sys_ipl_ccw_loadparm_attr.attr,
 613	&sys_ipl_vm_parm_attr.attr,
 614	&sys_ipl_secure_attr.attr,
 615	&sys_ipl_has_secure_attr.attr,
 616	NULL,
 617};
 618
 619static struct attribute *ipl_ccw_attrs_lpar[] = {
 620	&sys_ipl_type_attr.attr,
 621	&sys_ipl_device_attr.attr,
 622	&sys_ipl_ccw_loadparm_attr.attr,
 623	&sys_ipl_secure_attr.attr,
 624	&sys_ipl_has_secure_attr.attr,
 625	NULL,
 626};
 627
 628static struct attribute_group ipl_ccw_attr_group_vm = {
 629	.attrs = ipl_ccw_attrs_vm,
 630};
 631
 632static struct attribute_group ipl_ccw_attr_group_lpar = {
 633	.attrs = ipl_ccw_attrs_lpar
 634};
 635
 636/* UNKNOWN ipl device attributes */
 637
 638static struct attribute *ipl_unknown_attrs[] = {
 639	&sys_ipl_type_attr.attr,
 640	NULL,
 641};
 642
 643static struct attribute_group ipl_unknown_attr_group = {
 644	.attrs = ipl_unknown_attrs,
 645};
 646
 647static struct kset *ipl_kset;
 648
 649static void __ipl_run(void *unused)
 650{
 651	__bpon();
 652	diag308(DIAG308_LOAD_CLEAR, NULL);
 653}
 654
 655static void ipl_run(struct shutdown_trigger *trigger)
 656{
 657	smp_call_ipl_cpu(__ipl_run, NULL);
 658}
 659
 660static int __init ipl_init(void)
 661{
 662	int rc;
 663
 664	ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
 665	if (!ipl_kset) {
 666		rc = -ENOMEM;
 667		goto out;
 668	}
 669	switch (ipl_info.type) {
 670	case IPL_TYPE_CCW:
 671		if (MACHINE_IS_VM)
 672			rc = sysfs_create_group(&ipl_kset->kobj,
 673						&ipl_ccw_attr_group_vm);
 674		else
 675			rc = sysfs_create_group(&ipl_kset->kobj,
 676						&ipl_ccw_attr_group_lpar);
 677		break;
 678	case IPL_TYPE_ECKD:
 679		rc = sysfs_create_group(&ipl_kset->kobj, &ipl_eckd_attr_group);
 680		break;
 681	case IPL_TYPE_FCP:
 682	case IPL_TYPE_FCP_DUMP:
 683		rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
 684		break;
 685	case IPL_TYPE_NVME:
 686	case IPL_TYPE_NVME_DUMP:
 687		rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nvme_attr_group);
 688		break;
 689	default:
 690		rc = sysfs_create_group(&ipl_kset->kobj,
 691					&ipl_unknown_attr_group);
 692		break;
 693	}
 694out:
 695	if (rc)
 696		panic("ipl_init failed: rc = %i\n", rc);
 697
 698	return 0;
 699}
 700
 701static struct shutdown_action __refdata ipl_action = {
 702	.name	= SHUTDOWN_ACTION_IPL_STR,
 703	.fn	= ipl_run,
 704	.init	= ipl_init,
 705};
 706
 707/*
 708 * reipl shutdown action: Reboot Linux on shutdown.
 709 */
 710
 711/* VM IPL PARM attributes */
 712static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
 713					  char *page)
 714{
 715	char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
 716
 717	ipl_block_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
 718	return sprintf(page, "%s\n", vmparm);
 719}
 720
 721static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
 722					  size_t vmparm_max,
 723					  const char *buf, size_t len)
 724{
 725	int i, ip_len;
 726
 727	/* ignore trailing newline */
 728	ip_len = len;
 729	if ((len > 0) && (buf[len - 1] == '\n'))
 730		ip_len--;
 731
 732	if (ip_len > vmparm_max)
 733		return -EINVAL;
 734
 735	/* parm is used to store kernel options, check for common chars */
 736	for (i = 0; i < ip_len; i++)
 737		if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
 738			return -EINVAL;
 739
 740	memset(ipb->ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
 741	ipb->ccw.vm_parm_len = ip_len;
 742	if (ip_len > 0) {
 743		ipb->ccw.vm_flags |= IPL_PB0_CCW_VM_FLAG_VP;
 744		memcpy(ipb->ccw.vm_parm, buf, ip_len);
 745		ASCEBC(ipb->ccw.vm_parm, ip_len);
 746	} else {
 747		ipb->ccw.vm_flags &= ~IPL_PB0_CCW_VM_FLAG_VP;
 748	}
 749
 750	return len;
 751}
 752
 753/* NSS wrapper */
 754static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
 755				     struct kobj_attribute *attr, char *page)
 756{
 757	return reipl_generic_vmparm_show(reipl_block_nss, page);
 758}
 759
 760static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
 761				      struct kobj_attribute *attr,
 762				      const char *buf, size_t len)
 763{
 764	return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
 765}
 766
 767/* CCW wrapper */
 768static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
 769				     struct kobj_attribute *attr, char *page)
 770{
 771	return reipl_generic_vmparm_show(reipl_block_ccw, page);
 772}
 773
 774static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
 775				      struct kobj_attribute *attr,
 776				      const char *buf, size_t len)
 777{
 778	return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
 779}
 780
 781static struct kobj_attribute sys_reipl_nss_vmparm_attr =
 782	__ATTR(parm, 0644, reipl_nss_vmparm_show,
 783	       reipl_nss_vmparm_store);
 784static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
 785	__ATTR(parm, 0644, reipl_ccw_vmparm_show,
 786	       reipl_ccw_vmparm_store);
 787
 788/* FCP reipl device attributes */
 789
 790static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
 791				      struct bin_attribute *attr,
 792				      char *buf, loff_t off, size_t count)
 793{
 794	size_t size = reipl_block_fcp->fcp.scp_data_len;
 795	void *scp_data = reipl_block_fcp->fcp.scp_data;
 796
 797	return memory_read_from_buffer(buf, count, &off, scp_data, size);
 798}
 799
 800static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
 801				       struct bin_attribute *attr,
 802				       char *buf, loff_t off, size_t count)
 803{
 804	size_t scpdata_len = count;
 805	size_t padding;
 806
 807
 808	if (off)
 809		return -EINVAL;
 810
 811	memcpy(reipl_block_fcp->fcp.scp_data, buf, count);
 812	if (scpdata_len % 8) {
 813		padding = 8 - (scpdata_len % 8);
 814		memset(reipl_block_fcp->fcp.scp_data + scpdata_len,
 815		       0, padding);
 816		scpdata_len += padding;
 817	}
 818
 819	reipl_block_fcp->hdr.len = IPL_BP_FCP_LEN + scpdata_len;
 820	reipl_block_fcp->fcp.len = IPL_BP0_FCP_LEN + scpdata_len;
 821	reipl_block_fcp->fcp.scp_data_len = scpdata_len;
 822
 823	return count;
 824}
 825static struct bin_attribute sys_reipl_fcp_scp_data_attr =
 826	__BIN_ATTR(scp_data, 0644, reipl_fcp_scpdata_read,
 827		   reipl_fcp_scpdata_write, DIAG308_SCPDATA_SIZE);
 828
 829static struct bin_attribute *reipl_fcp_bin_attrs[] = {
 830	&sys_reipl_fcp_scp_data_attr,
 831	NULL,
 832};
 833
 834DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n",
 835		   reipl_block_fcp->fcp.wwpn);
 836DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n",
 837		   reipl_block_fcp->fcp.lun);
 838DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
 839		   reipl_block_fcp->fcp.bootprog);
 840DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
 841		   reipl_block_fcp->fcp.br_lba);
 842DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
 843		   reipl_block_fcp->fcp.devno);
 844
 845static void reipl_get_ascii_loadparm(char *loadparm,
 846				     struct ipl_parameter_block *ibp)
 847{
 848	memcpy(loadparm, ibp->common.loadparm, LOADPARM_LEN);
 849	EBCASC(loadparm, LOADPARM_LEN);
 850	loadparm[LOADPARM_LEN] = 0;
 851	strim(loadparm);
 852}
 853
 854static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
 855					   char *page)
 856{
 857	char buf[LOADPARM_LEN + 1];
 858
 859	reipl_get_ascii_loadparm(buf, ipb);
 860	return sprintf(page, "%s\n", buf);
 861}
 862
 863static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
 864					    const char *buf, size_t len)
 865{
 866	int i, lp_len;
 867
 868	/* ignore trailing newline */
 869	lp_len = len;
 870	if ((len > 0) && (buf[len - 1] == '\n'))
 871		lp_len--;
 872	/* loadparm can have max 8 characters and must not start with a blank */
 873	if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
 874		return -EINVAL;
 875	/* loadparm can only contain "a-z,A-Z,0-9,SP,." */
 876	for (i = 0; i < lp_len; i++) {
 877		if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
 878		    (buf[i] == '.'))
 879			continue;
 880		return -EINVAL;
 881	}
 882	/* initialize loadparm with blanks */
 883	memset(ipb->common.loadparm, ' ', LOADPARM_LEN);
 884	/* copy and convert to ebcdic */
 885	memcpy(ipb->common.loadparm, buf, lp_len);
 886	ASCEBC(ipb->common.loadparm, LOADPARM_LEN);
 887	ipb->common.flags |= IPL_PB0_FLAG_LOADPARM;
 888	return len;
 889}
 890
 891/* FCP wrapper */
 892static ssize_t reipl_fcp_loadparm_show(struct kobject *kobj,
 893				       struct kobj_attribute *attr, char *page)
 894{
 895	return reipl_generic_loadparm_show(reipl_block_fcp, page);
 896}
 897
 898static ssize_t reipl_fcp_loadparm_store(struct kobject *kobj,
 899					struct kobj_attribute *attr,
 900					const char *buf, size_t len)
 901{
 902	return reipl_generic_loadparm_store(reipl_block_fcp, buf, len);
 903}
 904
 905static struct kobj_attribute sys_reipl_fcp_loadparm_attr =
 906	__ATTR(loadparm, 0644, reipl_fcp_loadparm_show,
 907	       reipl_fcp_loadparm_store);
 908
 909static ssize_t reipl_fcp_clear_show(struct kobject *kobj,
 910				    struct kobj_attribute *attr, char *page)
 911{
 912	return sprintf(page, "%u\n", reipl_fcp_clear);
 913}
 914
 915static ssize_t reipl_fcp_clear_store(struct kobject *kobj,
 916				     struct kobj_attribute *attr,
 917				     const char *buf, size_t len)
 918{
 919	if (kstrtobool(buf, &reipl_fcp_clear) < 0)
 920		return -EINVAL;
 921	return len;
 922}
 923
 924static struct attribute *reipl_fcp_attrs[] = {
 925	&sys_reipl_fcp_device_attr.attr,
 926	&sys_reipl_fcp_wwpn_attr.attr,
 927	&sys_reipl_fcp_lun_attr.attr,
 928	&sys_reipl_fcp_bootprog_attr.attr,
 929	&sys_reipl_fcp_br_lba_attr.attr,
 930	&sys_reipl_fcp_loadparm_attr.attr,
 931	NULL,
 932};
 933
 934static struct attribute_group reipl_fcp_attr_group = {
 935	.attrs = reipl_fcp_attrs,
 936	.bin_attrs = reipl_fcp_bin_attrs,
 937};
 938
 939static struct kobj_attribute sys_reipl_fcp_clear_attr =
 940	__ATTR(clear, 0644, reipl_fcp_clear_show, reipl_fcp_clear_store);
 941
 942/* NVME reipl device attributes */
 943
 944static ssize_t reipl_nvme_scpdata_read(struct file *filp, struct kobject *kobj,
 945				      struct bin_attribute *attr,
 946				      char *buf, loff_t off, size_t count)
 947{
 948	size_t size = reipl_block_nvme->nvme.scp_data_len;
 949	void *scp_data = reipl_block_nvme->nvme.scp_data;
 950
 951	return memory_read_from_buffer(buf, count, &off, scp_data, size);
 952}
 953
 954static ssize_t reipl_nvme_scpdata_write(struct file *filp, struct kobject *kobj,
 955				       struct bin_attribute *attr,
 956				       char *buf, loff_t off, size_t count)
 957{
 958	size_t scpdata_len = count;
 959	size_t padding;
 960
 961	if (off)
 962		return -EINVAL;
 963
 964	memcpy(reipl_block_nvme->nvme.scp_data, buf, count);
 965	if (scpdata_len % 8) {
 966		padding = 8 - (scpdata_len % 8);
 967		memset(reipl_block_nvme->nvme.scp_data + scpdata_len,
 968		       0, padding);
 969		scpdata_len += padding;
 970	}
 971
 972	reipl_block_nvme->hdr.len = IPL_BP_FCP_LEN + scpdata_len;
 973	reipl_block_nvme->nvme.len = IPL_BP0_FCP_LEN + scpdata_len;
 974	reipl_block_nvme->nvme.scp_data_len = scpdata_len;
 975
 976	return count;
 977}
 978
 979static struct bin_attribute sys_reipl_nvme_scp_data_attr =
 980	__BIN_ATTR(scp_data, 0644, reipl_nvme_scpdata_read,
 981		   reipl_nvme_scpdata_write, DIAG308_SCPDATA_SIZE);
 982
 983static struct bin_attribute *reipl_nvme_bin_attrs[] = {
 984	&sys_reipl_nvme_scp_data_attr,
 985	NULL,
 986};
 987
 988DEFINE_IPL_ATTR_RW(reipl_nvme, fid, "0x%08llx\n", "%llx\n",
 989		   reipl_block_nvme->nvme.fid);
 990DEFINE_IPL_ATTR_RW(reipl_nvme, nsid, "0x%08llx\n", "%llx\n",
 991		   reipl_block_nvme->nvme.nsid);
 992DEFINE_IPL_ATTR_RW(reipl_nvme, bootprog, "%lld\n", "%lld\n",
 993		   reipl_block_nvme->nvme.bootprog);
 994DEFINE_IPL_ATTR_RW(reipl_nvme, br_lba, "%lld\n", "%lld\n",
 995		   reipl_block_nvme->nvme.br_lba);
 996
 997/* nvme wrapper */
 998static ssize_t reipl_nvme_loadparm_show(struct kobject *kobj,
 999				       struct kobj_attribute *attr, char *page)
1000{
1001	return reipl_generic_loadparm_show(reipl_block_nvme, page);
1002}
1003
1004static ssize_t reipl_nvme_loadparm_store(struct kobject *kobj,
1005					struct kobj_attribute *attr,
1006					const char *buf, size_t len)
1007{
1008	return reipl_generic_loadparm_store(reipl_block_nvme, buf, len);
1009}
1010
1011static struct kobj_attribute sys_reipl_nvme_loadparm_attr =
1012	__ATTR(loadparm, 0644, reipl_nvme_loadparm_show,
1013	       reipl_nvme_loadparm_store);
1014
1015static struct attribute *reipl_nvme_attrs[] = {
1016	&sys_reipl_nvme_fid_attr.attr,
1017	&sys_reipl_nvme_nsid_attr.attr,
1018	&sys_reipl_nvme_bootprog_attr.attr,
1019	&sys_reipl_nvme_br_lba_attr.attr,
1020	&sys_reipl_nvme_loadparm_attr.attr,
1021	NULL,
1022};
1023
1024static struct attribute_group reipl_nvme_attr_group = {
1025	.attrs = reipl_nvme_attrs,
1026	.bin_attrs = reipl_nvme_bin_attrs
1027};
1028
1029static ssize_t reipl_nvme_clear_show(struct kobject *kobj,
1030				     struct kobj_attribute *attr, char *page)
1031{
1032	return sprintf(page, "%u\n", reipl_nvme_clear);
1033}
1034
1035static ssize_t reipl_nvme_clear_store(struct kobject *kobj,
1036				      struct kobj_attribute *attr,
1037				      const char *buf, size_t len)
1038{
1039	if (kstrtobool(buf, &reipl_nvme_clear) < 0)
1040		return -EINVAL;
1041	return len;
1042}
1043
1044static struct kobj_attribute sys_reipl_nvme_clear_attr =
1045	__ATTR(clear, 0644, reipl_nvme_clear_show, reipl_nvme_clear_store);
1046
1047/* CCW reipl device attributes */
1048DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ccw);
1049
1050/* NSS wrapper */
1051static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
1052				       struct kobj_attribute *attr, char *page)
1053{
1054	return reipl_generic_loadparm_show(reipl_block_nss, page);
1055}
1056
1057static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
1058					struct kobj_attribute *attr,
1059					const char *buf, size_t len)
1060{
1061	return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
1062}
1063
1064/* CCW wrapper */
1065static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
1066				       struct kobj_attribute *attr, char *page)
1067{
1068	return reipl_generic_loadparm_show(reipl_block_ccw, page);
1069}
1070
1071static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
1072					struct kobj_attribute *attr,
1073					const char *buf, size_t len)
1074{
1075	return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
1076}
1077
1078static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
1079	__ATTR(loadparm, 0644, reipl_ccw_loadparm_show,
1080	       reipl_ccw_loadparm_store);
1081
1082static ssize_t reipl_ccw_clear_show(struct kobject *kobj,
1083				    struct kobj_attribute *attr, char *page)
1084{
1085	return sprintf(page, "%u\n", reipl_ccw_clear);
1086}
1087
1088static ssize_t reipl_ccw_clear_store(struct kobject *kobj,
1089				     struct kobj_attribute *attr,
1090				     const char *buf, size_t len)
1091{
1092	if (kstrtobool(buf, &reipl_ccw_clear) < 0)
1093		return -EINVAL;
1094	return len;
1095}
1096
1097static struct kobj_attribute sys_reipl_ccw_clear_attr =
1098	__ATTR(clear, 0644, reipl_ccw_clear_show, reipl_ccw_clear_store);
1099
1100static struct attribute *reipl_ccw_attrs_vm[] = {
1101	&sys_reipl_ccw_device_attr.attr,
1102	&sys_reipl_ccw_loadparm_attr.attr,
1103	&sys_reipl_ccw_vmparm_attr.attr,
1104	&sys_reipl_ccw_clear_attr.attr,
1105	NULL,
1106};
1107
1108static struct attribute *reipl_ccw_attrs_lpar[] = {
1109	&sys_reipl_ccw_device_attr.attr,
1110	&sys_reipl_ccw_loadparm_attr.attr,
1111	&sys_reipl_ccw_clear_attr.attr,
1112	NULL,
1113};
1114
1115static struct attribute_group reipl_ccw_attr_group_vm = {
1116	.name  = IPL_CCW_STR,
1117	.attrs = reipl_ccw_attrs_vm,
1118};
1119
1120static struct attribute_group reipl_ccw_attr_group_lpar = {
1121	.name  = IPL_CCW_STR,
1122	.attrs = reipl_ccw_attrs_lpar,
1123};
1124
1125/* ECKD reipl device attributes */
1126
1127static ssize_t reipl_eckd_scpdata_read(struct file *filp, struct kobject *kobj,
1128				       struct bin_attribute *attr,
1129				       char *buf, loff_t off, size_t count)
1130{
1131	size_t size = reipl_block_eckd->eckd.scp_data_len;
1132	void *scp_data = reipl_block_eckd->eckd.scp_data;
1133
1134	return memory_read_from_buffer(buf, count, &off, scp_data, size);
1135}
1136
1137static ssize_t reipl_eckd_scpdata_write(struct file *filp, struct kobject *kobj,
1138					struct bin_attribute *attr,
1139					char *buf, loff_t off, size_t count)
1140{
1141	size_t scpdata_len = count;
1142	size_t padding;
1143
1144	if (off)
1145		return -EINVAL;
1146
1147	memcpy(reipl_block_eckd->eckd.scp_data, buf, count);
1148	if (scpdata_len % 8) {
1149		padding = 8 - (scpdata_len % 8);
1150		memset(reipl_block_eckd->eckd.scp_data + scpdata_len,
1151		       0, padding);
1152		scpdata_len += padding;
1153	}
1154
1155	reipl_block_eckd->hdr.len = IPL_BP_ECKD_LEN + scpdata_len;
1156	reipl_block_eckd->eckd.len = IPL_BP0_ECKD_LEN + scpdata_len;
1157	reipl_block_eckd->eckd.scp_data_len = scpdata_len;
1158
1159	return count;
1160}
1161
1162static struct bin_attribute sys_reipl_eckd_scp_data_attr =
1163	__BIN_ATTR(scp_data, 0644, reipl_eckd_scpdata_read,
1164		   reipl_eckd_scpdata_write, DIAG308_SCPDATA_SIZE);
1165
1166static struct bin_attribute *reipl_eckd_bin_attrs[] = {
1167	&sys_reipl_eckd_scp_data_attr,
1168	NULL,
1169};
1170
1171DEFINE_IPL_CCW_ATTR_RW(reipl_eckd, device, reipl_block_eckd->eckd);
1172DEFINE_IPL_ATTR_RW(reipl_eckd, bootprog, "%lld\n", "%lld\n",
1173		   reipl_block_eckd->eckd.bootprog);
1174
1175static struct attribute *reipl_eckd_attrs[] = {
1176	&sys_reipl_eckd_device_attr.attr,
1177	&sys_reipl_eckd_bootprog_attr.attr,
1178	&sys_reipl_eckd_br_chr_attr.attr,
1179	NULL,
1180};
1181
1182static struct attribute_group reipl_eckd_attr_group = {
1183	.attrs = reipl_eckd_attrs,
1184	.bin_attrs = reipl_eckd_bin_attrs
1185};
1186
1187static ssize_t reipl_eckd_clear_show(struct kobject *kobj,
1188				     struct kobj_attribute *attr, char *page)
1189{
1190	return sprintf(page, "%u\n", reipl_eckd_clear);
1191}
1192
1193static ssize_t reipl_eckd_clear_store(struct kobject *kobj,
1194				      struct kobj_attribute *attr,
1195				      const char *buf, size_t len)
1196{
1197	if (strtobool(buf, &reipl_eckd_clear) < 0)
1198		return -EINVAL;
1199	return len;
1200}
1201
1202static struct kobj_attribute sys_reipl_eckd_clear_attr =
1203	__ATTR(clear, 0644, reipl_eckd_clear_show, reipl_eckd_clear_store);
1204
1205/* NSS reipl device attributes */
1206static void reipl_get_ascii_nss_name(char *dst,
1207				     struct ipl_parameter_block *ipb)
1208{
1209	memcpy(dst, ipb->ccw.nss_name, NSS_NAME_SIZE);
1210	EBCASC(dst, NSS_NAME_SIZE);
1211	dst[NSS_NAME_SIZE] = 0;
1212}
1213
1214static ssize_t reipl_nss_name_show(struct kobject *kobj,
1215				   struct kobj_attribute *attr, char *page)
1216{
1217	char nss_name[NSS_NAME_SIZE + 1] = {};
1218
1219	reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
1220	return sprintf(page, "%s\n", nss_name);
1221}
1222
1223static ssize_t reipl_nss_name_store(struct kobject *kobj,
1224				    struct kobj_attribute *attr,
1225				    const char *buf, size_t len)
1226{
1227	int nss_len;
1228
1229	/* ignore trailing newline */
1230	nss_len = len;
1231	if ((len > 0) && (buf[len - 1] == '\n'))
1232		nss_len--;
1233
1234	if (nss_len > NSS_NAME_SIZE)
1235		return -EINVAL;
1236
1237	memset(reipl_block_nss->ccw.nss_name, 0x40, NSS_NAME_SIZE);
1238	if (nss_len > 0) {
1239		reipl_block_nss->ccw.vm_flags |= IPL_PB0_CCW_VM_FLAG_NSS;
1240		memcpy(reipl_block_nss->ccw.nss_name, buf, nss_len);
1241		ASCEBC(reipl_block_nss->ccw.nss_name, nss_len);
1242		EBC_TOUPPER(reipl_block_nss->ccw.nss_name, nss_len);
1243	} else {
1244		reipl_block_nss->ccw.vm_flags &= ~IPL_PB0_CCW_VM_FLAG_NSS;
1245	}
1246
1247	return len;
1248}
1249
1250static struct kobj_attribute sys_reipl_nss_name_attr =
1251	__ATTR(name, 0644, reipl_nss_name_show,
1252	       reipl_nss_name_store);
1253
1254static struct kobj_attribute sys_reipl_nss_loadparm_attr =
1255	__ATTR(loadparm, 0644, reipl_nss_loadparm_show,
1256	       reipl_nss_loadparm_store);
1257
1258static struct attribute *reipl_nss_attrs[] = {
1259	&sys_reipl_nss_name_attr.attr,
1260	&sys_reipl_nss_loadparm_attr.attr,
1261	&sys_reipl_nss_vmparm_attr.attr,
1262	NULL,
1263};
1264
1265static struct attribute_group reipl_nss_attr_group = {
1266	.name  = IPL_NSS_STR,
1267	.attrs = reipl_nss_attrs,
1268};
1269
1270void set_os_info_reipl_block(void)
1271{
1272	os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual,
1273			  reipl_block_actual->hdr.len);
1274}
1275
1276/* reipl type */
1277
1278static int reipl_set_type(enum ipl_type type)
1279{
1280	if (!(reipl_capabilities & type))
1281		return -EINVAL;
1282
1283	switch(type) {
1284	case IPL_TYPE_CCW:
1285		reipl_block_actual = reipl_block_ccw;
1286		break;
1287	case IPL_TYPE_ECKD:
1288		reipl_block_actual = reipl_block_eckd;
1289		break;
1290	case IPL_TYPE_FCP:
1291		reipl_block_actual = reipl_block_fcp;
1292		break;
1293	case IPL_TYPE_NVME:
1294		reipl_block_actual = reipl_block_nvme;
1295		break;
1296	case IPL_TYPE_NSS:
1297		reipl_block_actual = reipl_block_nss;
1298		break;
1299	default:
1300		break;
1301	}
1302	reipl_type = type;
1303	return 0;
1304}
1305
1306static ssize_t reipl_type_show(struct kobject *kobj,
1307			       struct kobj_attribute *attr, char *page)
1308{
1309	return sprintf(page, "%s\n", ipl_type_str(reipl_type));
1310}
1311
1312static ssize_t reipl_type_store(struct kobject *kobj,
1313				struct kobj_attribute *attr,
1314				const char *buf, size_t len)
1315{
1316	int rc = -EINVAL;
1317
1318	if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1319		rc = reipl_set_type(IPL_TYPE_CCW);
1320	else if (strncmp(buf, IPL_ECKD_STR, strlen(IPL_ECKD_STR)) == 0)
1321		rc = reipl_set_type(IPL_TYPE_ECKD);
1322	else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1323		rc = reipl_set_type(IPL_TYPE_FCP);
1324	else if (strncmp(buf, IPL_NVME_STR, strlen(IPL_NVME_STR)) == 0)
1325		rc = reipl_set_type(IPL_TYPE_NVME);
1326	else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1327		rc = reipl_set_type(IPL_TYPE_NSS);
1328	return (rc != 0) ? rc : len;
1329}
1330
1331static struct kobj_attribute reipl_type_attr =
1332	__ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
1333
1334static struct kset *reipl_kset;
1335static struct kset *reipl_fcp_kset;
1336static struct kset *reipl_nvme_kset;
1337static struct kset *reipl_eckd_kset;
1338
1339static void __reipl_run(void *unused)
1340{
1341	switch (reipl_type) {
1342	case IPL_TYPE_CCW:
1343		diag308(DIAG308_SET, reipl_block_ccw);
1344		if (reipl_ccw_clear)
1345			diag308(DIAG308_LOAD_CLEAR, NULL);
1346		else
1347			diag308(DIAG308_LOAD_NORMAL_DUMP, NULL);
1348		break;
1349	case IPL_TYPE_ECKD:
1350		diag308(DIAG308_SET, reipl_block_eckd);
1351		if (reipl_eckd_clear)
1352			diag308(DIAG308_LOAD_CLEAR, NULL);
1353		else
1354			diag308(DIAG308_LOAD_NORMAL, NULL);
1355		break;
1356	case IPL_TYPE_FCP:
1357		diag308(DIAG308_SET, reipl_block_fcp);
1358		if (reipl_fcp_clear)
1359			diag308(DIAG308_LOAD_CLEAR, NULL);
1360		else
1361			diag308(DIAG308_LOAD_NORMAL, NULL);
1362		break;
1363	case IPL_TYPE_NVME:
1364		diag308(DIAG308_SET, reipl_block_nvme);
1365		if (reipl_nvme_clear)
1366			diag308(DIAG308_LOAD_CLEAR, NULL);
1367		else
1368			diag308(DIAG308_LOAD_NORMAL, NULL);
1369		break;
1370	case IPL_TYPE_NSS:
1371		diag308(DIAG308_SET, reipl_block_nss);
1372		diag308(DIAG308_LOAD_CLEAR, NULL);
1373		break;
1374	case IPL_TYPE_UNKNOWN:
1375		diag308(DIAG308_LOAD_CLEAR, NULL);
1376		break;
1377	case IPL_TYPE_FCP_DUMP:
1378	case IPL_TYPE_NVME_DUMP:
1379	case IPL_TYPE_ECKD_DUMP:
1380		break;
1381	}
1382	disabled_wait();
1383}
1384
1385static void reipl_run(struct shutdown_trigger *trigger)
1386{
1387	smp_call_ipl_cpu(__reipl_run, NULL);
1388}
1389
1390static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
1391{
1392	ipb->hdr.len = IPL_BP_CCW_LEN;
1393	ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1394	ipb->pb0_hdr.len = IPL_BP0_CCW_LEN;
1395	ipb->pb0_hdr.pbt = IPL_PBT_CCW;
1396}
1397
1398static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1399{
1400	/* LOADPARM */
1401	/* check if read scp info worked and set loadparm */
1402	if (sclp_ipl_info.is_valid)
1403		memcpy(ipb->ccw.loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
1404	else
1405		/* read scp info failed: set empty loadparm (EBCDIC blanks) */
1406		memset(ipb->ccw.loadparm, 0x40, LOADPARM_LEN);
1407	ipb->ccw.flags = IPL_PB0_FLAG_LOADPARM;
1408
1409	/* VM PARM */
1410	if (MACHINE_IS_VM && ipl_block_valid &&
1411	    (ipl_block.ccw.vm_flags & IPL_PB0_CCW_VM_FLAG_VP)) {
1412
1413		ipb->ccw.vm_flags |= IPL_PB0_CCW_VM_FLAG_VP;
1414		ipb->ccw.vm_parm_len = ipl_block.ccw.vm_parm_len;
1415		memcpy(ipb->ccw.vm_parm,
1416		       ipl_block.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1417	}
1418}
1419
1420static int __init reipl_nss_init(void)
1421{
1422	int rc;
1423
1424	if (!MACHINE_IS_VM)
1425		return 0;
1426
1427	reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1428	if (!reipl_block_nss)
1429		return -ENOMEM;
1430
1431	rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1432	if (rc)
1433		return rc;
1434
1435	reipl_block_ccw_init(reipl_block_nss);
1436	reipl_capabilities |= IPL_TYPE_NSS;
1437	return 0;
1438}
1439
1440static int __init reipl_ccw_init(void)
1441{
1442	int rc;
1443
1444	reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1445	if (!reipl_block_ccw)
1446		return -ENOMEM;
1447
1448	rc = sysfs_create_group(&reipl_kset->kobj,
1449				MACHINE_IS_VM ? &reipl_ccw_attr_group_vm
1450					      : &reipl_ccw_attr_group_lpar);
1451	if (rc)
1452		return rc;
1453
1454	reipl_block_ccw_init(reipl_block_ccw);
1455	if (ipl_info.type == IPL_TYPE_CCW) {
1456		reipl_block_ccw->ccw.ssid = ipl_block.ccw.ssid;
1457		reipl_block_ccw->ccw.devno = ipl_block.ccw.devno;
1458		reipl_block_ccw_fill_parms(reipl_block_ccw);
1459	}
1460
1461	reipl_capabilities |= IPL_TYPE_CCW;
1462	return 0;
1463}
1464
1465static int __init reipl_fcp_init(void)
1466{
1467	int rc;
1468
1469	reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1470	if (!reipl_block_fcp)
1471		return -ENOMEM;
1472
1473	/* sysfs: create fcp kset for mixing attr group and bin attrs */
1474	reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1475					     &reipl_kset->kobj);
1476	if (!reipl_fcp_kset) {
1477		free_page((unsigned long) reipl_block_fcp);
1478		return -ENOMEM;
1479	}
1480
1481	rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1482	if (rc)
1483		goto out1;
1484
1485	if (test_facility(141)) {
1486		rc = sysfs_create_file(&reipl_fcp_kset->kobj,
1487				       &sys_reipl_fcp_clear_attr.attr);
1488		if (rc)
1489			goto out2;
1490	} else {
1491		reipl_fcp_clear = true;
1492	}
1493
1494	if (ipl_info.type == IPL_TYPE_FCP) {
1495		memcpy(reipl_block_fcp, &ipl_block, sizeof(ipl_block));
1496		/*
1497		 * Fix loadparm: There are systems where the (SCSI) LOADPARM
1498		 * is invalid in the SCSI IPL parameter block, so take it
1499		 * always from sclp_ipl_info.
1500		 */
1501		memcpy(reipl_block_fcp->fcp.loadparm, sclp_ipl_info.loadparm,
1502		       LOADPARM_LEN);
1503	} else {
1504		reipl_block_fcp->hdr.len = IPL_BP_FCP_LEN;
1505		reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1506		reipl_block_fcp->fcp.len = IPL_BP0_FCP_LEN;
1507		reipl_block_fcp->fcp.pbt = IPL_PBT_FCP;
1508		reipl_block_fcp->fcp.opt = IPL_PB0_FCP_OPT_IPL;
1509	}
1510	reipl_capabilities |= IPL_TYPE_FCP;
1511	return 0;
1512
1513out2:
1514	sysfs_remove_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1515out1:
1516	kset_unregister(reipl_fcp_kset);
1517	free_page((unsigned long) reipl_block_fcp);
1518	return rc;
1519}
1520
1521static int __init reipl_nvme_init(void)
1522{
1523	int rc;
1524
1525	reipl_block_nvme = (void *) get_zeroed_page(GFP_KERNEL);
1526	if (!reipl_block_nvme)
1527		return -ENOMEM;
1528
1529	/* sysfs: create kset for mixing attr group and bin attrs */
1530	reipl_nvme_kset = kset_create_and_add(IPL_NVME_STR, NULL,
1531					     &reipl_kset->kobj);
1532	if (!reipl_nvme_kset) {
1533		free_page((unsigned long) reipl_block_nvme);
1534		return -ENOMEM;
1535	}
1536
1537	rc = sysfs_create_group(&reipl_nvme_kset->kobj, &reipl_nvme_attr_group);
1538	if (rc)
1539		goto out1;
1540
1541	if (test_facility(141)) {
1542		rc = sysfs_create_file(&reipl_nvme_kset->kobj,
1543				       &sys_reipl_nvme_clear_attr.attr);
1544		if (rc)
1545			goto out2;
1546	} else {
1547		reipl_nvme_clear = true;
1548	}
1549
1550	if (ipl_info.type == IPL_TYPE_NVME) {
1551		memcpy(reipl_block_nvme, &ipl_block, sizeof(ipl_block));
1552		/*
1553		 * Fix loadparm: There are systems where the (SCSI) LOADPARM
1554		 * is invalid in the IPL parameter block, so take it
1555		 * always from sclp_ipl_info.
1556		 */
1557		memcpy(reipl_block_nvme->nvme.loadparm, sclp_ipl_info.loadparm,
1558		       LOADPARM_LEN);
1559	} else {
1560		reipl_block_nvme->hdr.len = IPL_BP_NVME_LEN;
1561		reipl_block_nvme->hdr.version = IPL_PARM_BLOCK_VERSION;
1562		reipl_block_nvme->nvme.len = IPL_BP0_NVME_LEN;
1563		reipl_block_nvme->nvme.pbt = IPL_PBT_NVME;
1564		reipl_block_nvme->nvme.opt = IPL_PB0_NVME_OPT_IPL;
1565	}
1566	reipl_capabilities |= IPL_TYPE_NVME;
1567	return 0;
1568
1569out2:
1570	sysfs_remove_group(&reipl_nvme_kset->kobj, &reipl_nvme_attr_group);
1571out1:
1572	kset_unregister(reipl_nvme_kset);
1573	free_page((unsigned long) reipl_block_nvme);
1574	return rc;
1575}
1576
1577static int __init reipl_eckd_init(void)
1578{
1579	int rc;
1580
1581	if (!sclp.has_sipl_eckd)
1582		return 0;
1583
1584	reipl_block_eckd = (void *)get_zeroed_page(GFP_KERNEL);
1585	if (!reipl_block_eckd)
1586		return -ENOMEM;
1587
1588	/* sysfs: create kset for mixing attr group and bin attrs */
1589	reipl_eckd_kset = kset_create_and_add(IPL_ECKD_STR, NULL,
1590					      &reipl_kset->kobj);
1591	if (!reipl_eckd_kset) {
1592		free_page((unsigned long)reipl_block_eckd);
1593		return -ENOMEM;
1594	}
1595
1596	rc = sysfs_create_group(&reipl_eckd_kset->kobj, &reipl_eckd_attr_group);
1597	if (rc)
1598		goto out1;
1599
1600	if (test_facility(141)) {
1601		rc = sysfs_create_file(&reipl_eckd_kset->kobj,
1602				       &sys_reipl_eckd_clear_attr.attr);
1603		if (rc)
1604			goto out2;
1605	} else {
1606		reipl_eckd_clear = true;
1607	}
1608
1609	if (ipl_info.type == IPL_TYPE_ECKD) {
1610		memcpy(reipl_block_eckd, &ipl_block, sizeof(ipl_block));
1611	} else {
1612		reipl_block_eckd->hdr.len = IPL_BP_ECKD_LEN;
1613		reipl_block_eckd->hdr.version = IPL_PARM_BLOCK_VERSION;
1614		reipl_block_eckd->eckd.len = IPL_BP0_ECKD_LEN;
1615		reipl_block_eckd->eckd.pbt = IPL_PBT_ECKD;
1616		reipl_block_eckd->eckd.opt = IPL_PB0_ECKD_OPT_IPL;
1617	}
1618	reipl_capabilities |= IPL_TYPE_ECKD;
1619	return 0;
1620
1621out2:
1622	sysfs_remove_group(&reipl_eckd_kset->kobj, &reipl_eckd_attr_group);
1623out1:
1624	kset_unregister(reipl_eckd_kset);
1625	free_page((unsigned long)reipl_block_eckd);
1626	return rc;
1627}
1628
1629static int __init reipl_type_init(void)
1630{
1631	enum ipl_type reipl_type = ipl_info.type;
1632	struct ipl_parameter_block *reipl_block;
1633	unsigned long size;
1634
1635	reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size);
1636	if (!reipl_block)
1637		goto out;
1638	/*
1639	 * If we have an OS info reipl block, this will be used
1640	 */
1641	if (reipl_block->pb0_hdr.pbt == IPL_PBT_FCP) {
1642		memcpy(reipl_block_fcp, reipl_block, size);
1643		reipl_type = IPL_TYPE_FCP;
1644	} else if (reipl_block->pb0_hdr.pbt == IPL_PBT_NVME) {
1645		memcpy(reipl_block_nvme, reipl_block, size);
1646		reipl_type = IPL_TYPE_NVME;
1647	} else if (reipl_block->pb0_hdr.pbt == IPL_PBT_CCW) {
1648		memcpy(reipl_block_ccw, reipl_block, size);
1649		reipl_type = IPL_TYPE_CCW;
1650	} else if (reipl_block->pb0_hdr.pbt == IPL_PBT_ECKD) {
1651		memcpy(reipl_block_eckd, reipl_block, size);
1652		reipl_type = IPL_TYPE_ECKD;
1653	}
1654out:
1655	return reipl_set_type(reipl_type);
1656}
1657
1658static int __init reipl_init(void)
1659{
1660	int rc;
1661
1662	reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1663	if (!reipl_kset)
1664		return -ENOMEM;
1665	rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1666	if (rc) {
1667		kset_unregister(reipl_kset);
1668		return rc;
1669	}
1670	rc = reipl_ccw_init();
1671	if (rc)
1672		return rc;
1673	rc = reipl_eckd_init();
1674	if (rc)
1675		return rc;
1676	rc = reipl_fcp_init();
1677	if (rc)
1678		return rc;
1679	rc = reipl_nvme_init();
1680	if (rc)
1681		return rc;
1682	rc = reipl_nss_init();
1683	if (rc)
1684		return rc;
1685	return reipl_type_init();
1686}
1687
1688static struct shutdown_action __refdata reipl_action = {
1689	.name	= SHUTDOWN_ACTION_REIPL_STR,
1690	.fn	= reipl_run,
1691	.init	= reipl_init,
1692};
1693
1694/*
1695 * dump shutdown action: Dump Linux on shutdown.
1696 */
1697
1698/* FCP dump device attributes */
1699
1700DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n",
1701		   dump_block_fcp->fcp.wwpn);
1702DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n",
1703		   dump_block_fcp->fcp.lun);
1704DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1705		   dump_block_fcp->fcp.bootprog);
1706DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1707		   dump_block_fcp->fcp.br_lba);
1708DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1709		   dump_block_fcp->fcp.devno);
1710
1711static struct attribute *dump_fcp_attrs[] = {
1712	&sys_dump_fcp_device_attr.attr,
1713	&sys_dump_fcp_wwpn_attr.attr,
1714	&sys_dump_fcp_lun_attr.attr,
1715	&sys_dump_fcp_bootprog_attr.attr,
1716	&sys_dump_fcp_br_lba_attr.attr,
1717	NULL,
1718};
1719
1720static struct attribute_group dump_fcp_attr_group = {
1721	.name  = IPL_FCP_STR,
1722	.attrs = dump_fcp_attrs,
1723};
1724
1725/* NVME dump device attributes */
1726DEFINE_IPL_ATTR_RW(dump_nvme, fid, "0x%08llx\n", "%llx\n",
1727		   dump_block_nvme->nvme.fid);
1728DEFINE_IPL_ATTR_RW(dump_nvme, nsid, "0x%08llx\n", "%llx\n",
1729		   dump_block_nvme->nvme.nsid);
1730DEFINE_IPL_ATTR_RW(dump_nvme, bootprog, "%lld\n", "%llx\n",
1731		   dump_block_nvme->nvme.bootprog);
1732DEFINE_IPL_ATTR_RW(dump_nvme, br_lba, "%lld\n", "%llx\n",
1733		   dump_block_nvme->nvme.br_lba);
1734
1735static struct attribute *dump_nvme_attrs[] = {
1736	&sys_dump_nvme_fid_attr.attr,
1737	&sys_dump_nvme_nsid_attr.attr,
1738	&sys_dump_nvme_bootprog_attr.attr,
1739	&sys_dump_nvme_br_lba_attr.attr,
1740	NULL,
1741};
1742
1743static struct attribute_group dump_nvme_attr_group = {
1744	.name  = IPL_NVME_STR,
1745	.attrs = dump_nvme_attrs,
1746};
1747
1748/* ECKD dump device attributes */
1749DEFINE_IPL_CCW_ATTR_RW(dump_eckd, device, dump_block_eckd->eckd);
1750DEFINE_IPL_ATTR_RW(dump_eckd, bootprog, "%lld\n", "%llx\n",
1751		   dump_block_eckd->eckd.bootprog);
1752
1753IPL_ATTR_BR_CHR_SHOW_FN(dump, dump_block_eckd->eckd);
1754IPL_ATTR_BR_CHR_STORE_FN(dump, dump_block_eckd->eckd);
1755
1756static struct kobj_attribute sys_dump_eckd_br_chr_attr =
1757	__ATTR(br_chr, 0644, eckd_dump_br_chr_show, eckd_dump_br_chr_store);
1758
1759static struct attribute *dump_eckd_attrs[] = {
1760	&sys_dump_eckd_device_attr.attr,
1761	&sys_dump_eckd_bootprog_attr.attr,
1762	&sys_dump_eckd_br_chr_attr.attr,
1763	NULL,
1764};
1765
1766static struct attribute_group dump_eckd_attr_group = {
1767	.name  = IPL_ECKD_STR,
1768	.attrs = dump_eckd_attrs,
1769};
1770
1771/* CCW dump device attributes */
1772DEFINE_IPL_CCW_ATTR_RW(dump_ccw, device, dump_block_ccw->ccw);
1773
1774static struct attribute *dump_ccw_attrs[] = {
1775	&sys_dump_ccw_device_attr.attr,
1776	NULL,
1777};
1778
1779static struct attribute_group dump_ccw_attr_group = {
1780	.name  = IPL_CCW_STR,
1781	.attrs = dump_ccw_attrs,
1782};
1783
1784/* dump type */
1785
1786static int dump_set_type(enum dump_type type)
1787{
1788	if (!(dump_capabilities & type))
1789		return -EINVAL;
1790	dump_type = type;
1791	return 0;
1792}
1793
1794static ssize_t dump_type_show(struct kobject *kobj,
1795			      struct kobj_attribute *attr, char *page)
1796{
1797	return sprintf(page, "%s\n", dump_type_str(dump_type));
1798}
1799
1800static ssize_t dump_type_store(struct kobject *kobj,
1801			       struct kobj_attribute *attr,
1802			       const char *buf, size_t len)
1803{
1804	int rc = -EINVAL;
1805
1806	if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1807		rc = dump_set_type(DUMP_TYPE_NONE);
1808	else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1809		rc = dump_set_type(DUMP_TYPE_CCW);
1810	else if (strncmp(buf, DUMP_ECKD_STR, strlen(DUMP_ECKD_STR)) == 0)
1811		rc = dump_set_type(DUMP_TYPE_ECKD);
1812	else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1813		rc = dump_set_type(DUMP_TYPE_FCP);
1814	else if (strncmp(buf, DUMP_NVME_STR, strlen(DUMP_NVME_STR)) == 0)
1815		rc = dump_set_type(DUMP_TYPE_NVME);
1816	return (rc != 0) ? rc : len;
1817}
1818
1819static struct kobj_attribute dump_type_attr =
1820	__ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1821
1822static struct kset *dump_kset;
1823
1824static void diag308_dump(void *dump_block)
1825{
1826	diag308(DIAG308_SET, dump_block);
1827	while (1) {
1828		if (diag308(DIAG308_LOAD_NORMAL_DUMP, NULL) != 0x302)
1829			break;
1830		udelay(USEC_PER_SEC);
1831	}
1832}
1833
1834static void __dump_run(void *unused)
1835{
1836	switch (dump_type) {
1837	case DUMP_TYPE_CCW:
1838		diag308_dump(dump_block_ccw);
1839		break;
1840	case DUMP_TYPE_ECKD:
1841		diag308_dump(dump_block_eckd);
1842		break;
1843	case DUMP_TYPE_FCP:
1844		diag308_dump(dump_block_fcp);
1845		break;
1846	case DUMP_TYPE_NVME:
1847		diag308_dump(dump_block_nvme);
1848		break;
1849	default:
1850		break;
1851	}
1852}
1853
1854static void dump_run(struct shutdown_trigger *trigger)
1855{
1856	if (dump_type == DUMP_TYPE_NONE)
1857		return;
1858	smp_send_stop();
1859	smp_call_ipl_cpu(__dump_run, NULL);
1860}
1861
1862static int __init dump_ccw_init(void)
1863{
1864	int rc;
1865
1866	dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1867	if (!dump_block_ccw)
1868		return -ENOMEM;
1869	rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1870	if (rc) {
1871		free_page((unsigned long)dump_block_ccw);
1872		return rc;
1873	}
1874	dump_block_ccw->hdr.len = IPL_BP_CCW_LEN;
1875	dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1876	dump_block_ccw->ccw.len = IPL_BP0_CCW_LEN;
1877	dump_block_ccw->ccw.pbt = IPL_PBT_CCW;
1878	dump_capabilities |= DUMP_TYPE_CCW;
1879	return 0;
1880}
1881
1882static int __init dump_fcp_init(void)
1883{
1884	int rc;
1885
1886	if (!sclp_ipl_info.has_dump)
1887		return 0; /* LDIPL DUMP is not installed */
1888	dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1889	if (!dump_block_fcp)
1890		return -ENOMEM;
1891	rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1892	if (rc) {
1893		free_page((unsigned long)dump_block_fcp);
1894		return rc;
1895	}
1896	dump_block_fcp->hdr.len = IPL_BP_FCP_LEN;
1897	dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1898	dump_block_fcp->fcp.len = IPL_BP0_FCP_LEN;
1899	dump_block_fcp->fcp.pbt = IPL_PBT_FCP;
1900	dump_block_fcp->fcp.opt = IPL_PB0_FCP_OPT_DUMP;
1901	dump_capabilities |= DUMP_TYPE_FCP;
1902	return 0;
1903}
1904
1905static int __init dump_nvme_init(void)
1906{
1907	int rc;
1908
1909	if (!sclp_ipl_info.has_dump)
1910		return 0; /* LDIPL DUMP is not installed */
1911	dump_block_nvme = (void *) get_zeroed_page(GFP_KERNEL);
1912	if (!dump_block_nvme)
1913		return -ENOMEM;
1914	rc = sysfs_create_group(&dump_kset->kobj, &dump_nvme_attr_group);
1915	if (rc) {
1916		free_page((unsigned long)dump_block_nvme);
1917		return rc;
1918	}
1919	dump_block_nvme->hdr.len = IPL_BP_NVME_LEN;
1920	dump_block_nvme->hdr.version = IPL_PARM_BLOCK_VERSION;
1921	dump_block_nvme->fcp.len = IPL_BP0_NVME_LEN;
1922	dump_block_nvme->fcp.pbt = IPL_PBT_NVME;
1923	dump_block_nvme->fcp.opt = IPL_PB0_NVME_OPT_DUMP;
1924	dump_capabilities |= DUMP_TYPE_NVME;
1925	return 0;
1926}
1927
1928static int __init dump_eckd_init(void)
1929{
1930	int rc;
1931
1932	if (!sclp_ipl_info.has_dump || !sclp.has_sipl_eckd)
1933		return 0; /* LDIPL DUMP is not installed */
1934	dump_block_eckd = (void *)get_zeroed_page(GFP_KERNEL);
1935	if (!dump_block_eckd)
1936		return -ENOMEM;
1937	rc = sysfs_create_group(&dump_kset->kobj, &dump_eckd_attr_group);
1938	if (rc) {
1939		free_page((unsigned long)dump_block_eckd);
1940		return rc;
1941	}
1942	dump_block_eckd->hdr.len = IPL_BP_ECKD_LEN;
1943	dump_block_eckd->hdr.version = IPL_PARM_BLOCK_VERSION;
1944	dump_block_eckd->eckd.len = IPL_BP0_ECKD_LEN;
1945	dump_block_eckd->eckd.pbt = IPL_PBT_ECKD;
1946	dump_block_eckd->eckd.opt = IPL_PB0_ECKD_OPT_DUMP;
1947	dump_capabilities |= DUMP_TYPE_ECKD;
1948	return 0;
1949}
1950
1951static int __init dump_init(void)
1952{
1953	int rc;
1954
1955	dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1956	if (!dump_kset)
1957		return -ENOMEM;
1958	rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1959	if (rc) {
1960		kset_unregister(dump_kset);
1961		return rc;
1962	}
1963	rc = dump_ccw_init();
1964	if (rc)
1965		return rc;
1966	rc = dump_eckd_init();
1967	if (rc)
1968		return rc;
1969	rc = dump_fcp_init();
1970	if (rc)
1971		return rc;
1972	rc = dump_nvme_init();
1973	if (rc)
1974		return rc;
1975	dump_set_type(DUMP_TYPE_NONE);
1976	return 0;
1977}
1978
1979static struct shutdown_action __refdata dump_action = {
1980	.name	= SHUTDOWN_ACTION_DUMP_STR,
1981	.fn	= dump_run,
1982	.init	= dump_init,
1983};
1984
1985static void dump_reipl_run(struct shutdown_trigger *trigger)
1986{
1987	unsigned long ipib = (unsigned long) reipl_block_actual;
1988	struct lowcore *abs_lc;
1989	unsigned long flags;
1990	unsigned int csum;
1991
1992	csum = (__force unsigned int)
1993	       csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
1994	abs_lc = get_abs_lowcore(&flags);
1995	abs_lc->ipib = ipib;
1996	abs_lc->ipib_checksum = csum;
1997	put_abs_lowcore(abs_lc, flags);
1998	dump_run(trigger);
1999}
2000
2001static struct shutdown_action __refdata dump_reipl_action = {
2002	.name	= SHUTDOWN_ACTION_DUMP_REIPL_STR,
2003	.fn	= dump_reipl_run,
2004};
2005
2006/*
2007 * vmcmd shutdown action: Trigger vm command on shutdown.
2008 */
2009
2010static char vmcmd_on_reboot[128];
2011static char vmcmd_on_panic[128];
2012static char vmcmd_on_halt[128];
2013static char vmcmd_on_poff[128];
2014static char vmcmd_on_restart[128];
2015
2016DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
2017DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
2018DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
2019DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
2020DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
2021
2022static struct attribute *vmcmd_attrs[] = {
2023	&sys_vmcmd_on_reboot_attr.attr,
2024	&sys_vmcmd_on_panic_attr.attr,
2025	&sys_vmcmd_on_halt_attr.attr,
2026	&sys_vmcmd_on_poff_attr.attr,
2027	&sys_vmcmd_on_restart_attr.attr,
2028	NULL,
2029};
2030
2031static struct attribute_group vmcmd_attr_group = {
2032	.attrs = vmcmd_attrs,
2033};
2034
2035static struct kset *vmcmd_kset;
2036
2037static void vmcmd_run(struct shutdown_trigger *trigger)
2038{
2039	char *cmd;
2040
2041	if (strcmp(trigger->name, ON_REIPL_STR) == 0)
2042		cmd = vmcmd_on_reboot;
2043	else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
2044		cmd = vmcmd_on_panic;
2045	else if (strcmp(trigger->name, ON_HALT_STR) == 0)
2046		cmd = vmcmd_on_halt;
2047	else if (strcmp(trigger->name, ON_POFF_STR) == 0)
2048		cmd = vmcmd_on_poff;
2049	else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
2050		cmd = vmcmd_on_restart;
2051	else
2052		return;
2053
2054	if (strlen(cmd) == 0)
2055		return;
2056	__cpcmd(cmd, NULL, 0, NULL);
2057}
2058
2059static int vmcmd_init(void)
2060{
2061	if (!MACHINE_IS_VM)
2062		return -EOPNOTSUPP;
2063	vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
2064	if (!vmcmd_kset)
2065		return -ENOMEM;
2066	return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
2067}
2068
2069static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
2070					      vmcmd_run, vmcmd_init};
2071
2072/*
2073 * stop shutdown action: Stop Linux on shutdown.
2074 */
2075
2076static void stop_run(struct shutdown_trigger *trigger)
2077{
2078	if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
2079	    strcmp(trigger->name, ON_RESTART_STR) == 0)
2080		disabled_wait();
2081	smp_stop_cpu();
2082}
2083
2084static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
2085					     stop_run, NULL};
2086
2087/* action list */
2088
2089static struct shutdown_action *shutdown_actions_list[] = {
2090	&ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
2091	&vmcmd_action, &stop_action};
2092#define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
2093
2094/*
2095 * Trigger section
2096 */
2097
2098static struct kset *shutdown_actions_kset;
2099
2100static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
2101		       size_t len)
2102{
2103	int i;
2104
2105	for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
2106		if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
2107			if (shutdown_actions_list[i]->init_rc) {
2108				return shutdown_actions_list[i]->init_rc;
2109			} else {
2110				trigger->action = shutdown_actions_list[i];
2111				return len;
2112			}
2113		}
2114	}
2115	return -EINVAL;
2116}
2117
2118/* on reipl */
2119
2120static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
2121						    &reipl_action};
2122
2123static ssize_t on_reboot_show(struct kobject *kobj,
2124			      struct kobj_attribute *attr, char *page)
2125{
2126	return sprintf(page, "%s\n", on_reboot_trigger.action->name);
2127}
2128
2129static ssize_t on_reboot_store(struct kobject *kobj,
2130			       struct kobj_attribute *attr,
2131			       const char *buf, size_t len)
2132{
2133	return set_trigger(buf, &on_reboot_trigger, len);
2134}
2135static struct kobj_attribute on_reboot_attr = __ATTR_RW(on_reboot);
2136
2137static void do_machine_restart(char *__unused)
2138{
2139	smp_send_stop();
2140	on_reboot_trigger.action->fn(&on_reboot_trigger);
2141	reipl_run(NULL);
2142}
2143void (*_machine_restart)(char *command) = do_machine_restart;
2144
2145/* on panic */
2146
2147static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
2148
2149static ssize_t on_panic_show(struct kobject *kobj,
2150			     struct kobj_attribute *attr, char *page)
2151{
2152	return sprintf(page, "%s\n", on_panic_trigger.action->name);
2153}
2154
2155static ssize_t on_panic_store(struct kobject *kobj,
2156			      struct kobj_attribute *attr,
2157			      const char *buf, size_t len)
2158{
2159	return set_trigger(buf, &on_panic_trigger, len);
2160}
2161static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic);
2162
2163static void do_panic(void)
2164{
2165	lgr_info_log();
2166	on_panic_trigger.action->fn(&on_panic_trigger);
2167	stop_run(&on_panic_trigger);
2168}
2169
2170/* on restart */
2171
2172static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
2173	&stop_action};
2174
2175static ssize_t on_restart_show(struct kobject *kobj,
2176			       struct kobj_attribute *attr, char *page)
2177{
2178	return sprintf(page, "%s\n", on_restart_trigger.action->name);
2179}
2180
2181static ssize_t on_restart_store(struct kobject *kobj,
2182				struct kobj_attribute *attr,
2183				const char *buf, size_t len)
2184{
2185	return set_trigger(buf, &on_restart_trigger, len);
2186}
2187static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart);
2188
2189static void __do_restart(void *ignore)
2190{
2191	smp_send_stop();
2192#ifdef CONFIG_CRASH_DUMP
2193	crash_kexec(NULL);
2194#endif
2195	on_restart_trigger.action->fn(&on_restart_trigger);
2196	stop_run(&on_restart_trigger);
2197}
2198
2199void do_restart(void *arg)
2200{
2201	tracing_off();
2202	debug_locks_off();
2203	lgr_info_log();
2204	smp_call_online_cpu(__do_restart, arg);
2205}
2206
2207/* on halt */
2208
2209static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
2210
2211static ssize_t on_halt_show(struct kobject *kobj,
2212			    struct kobj_attribute *attr, char *page)
2213{
2214	return sprintf(page, "%s\n", on_halt_trigger.action->name);
2215}
2216
2217static ssize_t on_halt_store(struct kobject *kobj,
2218			     struct kobj_attribute *attr,
2219			     const char *buf, size_t len)
2220{
2221	return set_trigger(buf, &on_halt_trigger, len);
2222}
2223static struct kobj_attribute on_halt_attr = __ATTR_RW(on_halt);
2224
2225static void do_machine_halt(void)
2226{
2227	smp_send_stop();
2228	on_halt_trigger.action->fn(&on_halt_trigger);
2229	stop_run(&on_halt_trigger);
2230}
2231void (*_machine_halt)(void) = do_machine_halt;
2232
2233/* on power off */
2234
2235static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
2236
2237static ssize_t on_poff_show(struct kobject *kobj,
2238			    struct kobj_attribute *attr, char *page)
2239{
2240	return sprintf(page, "%s\n", on_poff_trigger.action->name);
2241}
2242
2243static ssize_t on_poff_store(struct kobject *kobj,
2244			     struct kobj_attribute *attr,
2245			     const char *buf, size_t len)
2246{
2247	return set_trigger(buf, &on_poff_trigger, len);
2248}
2249static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff);
2250
2251static void do_machine_power_off(void)
2252{
2253	smp_send_stop();
2254	on_poff_trigger.action->fn(&on_poff_trigger);
2255	stop_run(&on_poff_trigger);
2256}
2257void (*_machine_power_off)(void) = do_machine_power_off;
2258
2259static struct attribute *shutdown_action_attrs[] = {
2260	&on_restart_attr.attr,
2261	&on_reboot_attr.attr,
2262	&on_panic_attr.attr,
2263	&on_halt_attr.attr,
2264	&on_poff_attr.attr,
2265	NULL,
2266};
2267
2268static struct attribute_group shutdown_action_attr_group = {
2269	.attrs = shutdown_action_attrs,
2270};
2271
2272static void __init shutdown_triggers_init(void)
2273{
2274	shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
2275						    firmware_kobj);
2276	if (!shutdown_actions_kset)
2277		goto fail;
2278	if (sysfs_create_group(&shutdown_actions_kset->kobj,
2279			       &shutdown_action_attr_group))
2280		goto fail;
2281	return;
2282fail:
2283	panic("shutdown_triggers_init failed\n");
2284}
2285
2286static void __init shutdown_actions_init(void)
2287{
2288	int i;
2289
2290	for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
2291		if (!shutdown_actions_list[i]->init)
2292			continue;
2293		shutdown_actions_list[i]->init_rc =
2294			shutdown_actions_list[i]->init();
2295	}
2296}
2297
2298static int __init s390_ipl_init(void)
2299{
2300	char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40};
2301
2302	sclp_early_get_ipl_info(&sclp_ipl_info);
2303	/*
2304	 * Fix loadparm: There are systems where the (SCSI) LOADPARM
2305	 * returned by read SCP info is invalid (contains EBCDIC blanks)
2306	 * when the system has been booted via diag308. In that case we use
2307	 * the value from diag308, if available.
2308	 *
2309	 * There are also systems where diag308 store does not work in
2310	 * case the system is booted from HMC. Fortunately in this case
2311	 * READ SCP info provides the correct value.
2312	 */
2313	if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 && ipl_block_valid)
2314		memcpy(sclp_ipl_info.loadparm, ipl_block.ccw.loadparm, LOADPARM_LEN);
2315	shutdown_actions_init();
2316	shutdown_triggers_init();
2317	return 0;
2318}
2319
2320__initcall(s390_ipl_init);
2321
2322static void __init strncpy_skip_quote(char *dst, char *src, int n)
2323{
2324	int sx, dx;
2325
2326	dx = 0;
2327	for (sx = 0; src[sx] != 0; sx++) {
2328		if (src[sx] == '"')
2329			continue;
2330		dst[dx++] = src[sx];
2331		if (dx >= n)
2332			break;
2333	}
2334}
2335
2336static int __init vmcmd_on_reboot_setup(char *str)
2337{
2338	if (!MACHINE_IS_VM)
2339		return 1;
2340	strncpy_skip_quote(vmcmd_on_reboot, str, 127);
2341	vmcmd_on_reboot[127] = 0;
2342	on_reboot_trigger.action = &vmcmd_action;
2343	return 1;
2344}
2345__setup("vmreboot=", vmcmd_on_reboot_setup);
2346
2347static int __init vmcmd_on_panic_setup(char *str)
2348{
2349	if (!MACHINE_IS_VM)
2350		return 1;
2351	strncpy_skip_quote(vmcmd_on_panic, str, 127);
2352	vmcmd_on_panic[127] = 0;
2353	on_panic_trigger.action = &vmcmd_action;
2354	return 1;
2355}
2356__setup("vmpanic=", vmcmd_on_panic_setup);
2357
2358static int __init vmcmd_on_halt_setup(char *str)
2359{
2360	if (!MACHINE_IS_VM)
2361		return 1;
2362	strncpy_skip_quote(vmcmd_on_halt, str, 127);
2363	vmcmd_on_halt[127] = 0;
2364	on_halt_trigger.action = &vmcmd_action;
2365	return 1;
2366}
2367__setup("vmhalt=", vmcmd_on_halt_setup);
2368
2369static int __init vmcmd_on_poff_setup(char *str)
2370{
2371	if (!MACHINE_IS_VM)
2372		return 1;
2373	strncpy_skip_quote(vmcmd_on_poff, str, 127);
2374	vmcmd_on_poff[127] = 0;
2375	on_poff_trigger.action = &vmcmd_action;
2376	return 1;
2377}
2378__setup("vmpoff=", vmcmd_on_poff_setup);
2379
2380static int on_panic_notify(struct notifier_block *self,
2381			   unsigned long event, void *data)
2382{
2383	do_panic();
2384	return NOTIFY_OK;
2385}
2386
2387static struct notifier_block on_panic_nb = {
2388	.notifier_call = on_panic_notify,
2389	.priority = INT_MIN,
2390};
2391
2392void __init setup_ipl(void)
2393{
2394	BUILD_BUG_ON(sizeof(struct ipl_parameter_block) != PAGE_SIZE);
2395
2396	ipl_info.type = get_ipl_type();
2397	switch (ipl_info.type) {
2398	case IPL_TYPE_CCW:
2399		ipl_info.data.ccw.dev_id.ssid = ipl_block.ccw.ssid;
2400		ipl_info.data.ccw.dev_id.devno = ipl_block.ccw.devno;
2401		break;
2402	case IPL_TYPE_ECKD:
2403	case IPL_TYPE_ECKD_DUMP:
2404		ipl_info.data.eckd.dev_id.ssid = ipl_block.eckd.ssid;
2405		ipl_info.data.eckd.dev_id.devno = ipl_block.eckd.devno;
2406		break;
2407	case IPL_TYPE_FCP:
2408	case IPL_TYPE_FCP_DUMP:
2409		ipl_info.data.fcp.dev_id.ssid = 0;
2410		ipl_info.data.fcp.dev_id.devno = ipl_block.fcp.devno;
2411		ipl_info.data.fcp.wwpn = ipl_block.fcp.wwpn;
2412		ipl_info.data.fcp.lun = ipl_block.fcp.lun;
2413		break;
2414	case IPL_TYPE_NVME:
2415	case IPL_TYPE_NVME_DUMP:
2416		ipl_info.data.nvme.fid = ipl_block.nvme.fid;
2417		ipl_info.data.nvme.nsid = ipl_block.nvme.nsid;
2418		break;
2419	case IPL_TYPE_NSS:
2420	case IPL_TYPE_UNKNOWN:
2421		/* We have no info to copy */
2422		break;
2423	}
2424	atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
2425}
2426
2427void s390_reset_system(void)
2428{
2429	/* Disable prefixing */
2430	set_prefix(0);
2431
2432	/* Disable lowcore protection */
2433	__ctl_clear_bit(0, 28);
2434	diag_amode31_ops.diag308_reset();
2435}
2436
2437#ifdef CONFIG_KEXEC_FILE
2438
2439int ipl_report_add_component(struct ipl_report *report, struct kexec_buf *kbuf,
2440			     unsigned char flags, unsigned short cert)
2441{
2442	struct ipl_report_component *comp;
2443
2444	comp = vzalloc(sizeof(*comp));
2445	if (!comp)
2446		return -ENOMEM;
2447	list_add_tail(&comp->list, &report->components);
2448
2449	comp->entry.addr = kbuf->mem;
2450	comp->entry.len = kbuf->memsz;
2451	comp->entry.flags = flags;
2452	comp->entry.certificate_index = cert;
2453
2454	report->size += sizeof(comp->entry);
2455
2456	return 0;
2457}
2458
2459int ipl_report_add_certificate(struct ipl_report *report, void *key,
2460			       unsigned long addr, unsigned long len)
2461{
2462	struct ipl_report_certificate *cert;
2463
2464	cert = vzalloc(sizeof(*cert));
2465	if (!cert)
2466		return -ENOMEM;
2467	list_add_tail(&cert->list, &report->certificates);
2468
2469	cert->entry.addr = addr;
2470	cert->entry.len = len;
2471	cert->key = key;
2472
2473	report->size += sizeof(cert->entry);
2474	report->size += cert->entry.len;
2475
2476	return 0;
2477}
2478
2479struct ipl_report *ipl_report_init(struct ipl_parameter_block *ipib)
2480{
2481	struct ipl_report *report;
2482
2483	report = vzalloc(sizeof(*report));
2484	if (!report)
2485		return ERR_PTR(-ENOMEM);
2486
2487	report->ipib = ipib;
2488	INIT_LIST_HEAD(&report->components);
2489	INIT_LIST_HEAD(&report->certificates);
2490
2491	report->size = ALIGN(ipib->hdr.len, 8);
2492	report->size += sizeof(struct ipl_rl_hdr);
2493	report->size += sizeof(struct ipl_rb_components);
2494	report->size += sizeof(struct ipl_rb_certificates);
2495
2496	return report;
2497}
2498
2499void *ipl_report_finish(struct ipl_report *report)
2500{
2501	struct ipl_report_certificate *cert;
2502	struct ipl_report_component *comp;
2503	struct ipl_rb_certificates *certs;
2504	struct ipl_parameter_block *ipib;
2505	struct ipl_rb_components *comps;
2506	struct ipl_rl_hdr *rl_hdr;
2507	void *buf, *ptr;
2508
2509	buf = vzalloc(report->size);
2510	if (!buf)
2511		goto out;
2512	ptr = buf;
2513
2514	memcpy(ptr, report->ipib, report->ipib->hdr.len);
2515	ipib = ptr;
2516	if (ipl_secure_flag)
2517		ipib->hdr.flags |= IPL_PL_FLAG_SIPL;
2518	ipib->hdr.flags |= IPL_PL_FLAG_IPLSR;
2519	ptr += report->ipib->hdr.len;
2520	ptr = PTR_ALIGN(ptr, 8);
2521
2522	rl_hdr = ptr;
2523	ptr += sizeof(*rl_hdr);
2524
2525	comps = ptr;
2526	comps->rbt = IPL_RBT_COMPONENTS;
2527	ptr += sizeof(*comps);
2528	list_for_each_entry(comp, &report->components, list) {
2529		memcpy(ptr, &comp->entry, sizeof(comp->entry));
2530		ptr += sizeof(comp->entry);
2531	}
2532	comps->len = ptr - (void *)comps;
2533
2534	certs = ptr;
2535	certs->rbt = IPL_RBT_CERTIFICATES;
2536	ptr += sizeof(*certs);
2537	list_for_each_entry(cert, &report->certificates, list) {
2538		memcpy(ptr, &cert->entry, sizeof(cert->entry));
2539		ptr += sizeof(cert->entry);
2540	}
2541	certs->len = ptr - (void *)certs;
2542	rl_hdr->len = ptr - (void *)rl_hdr;
2543
2544	list_for_each_entry(cert, &report->certificates, list) {
2545		memcpy(ptr, cert->key, cert->entry.len);
2546		ptr += cert->entry.len;
2547	}
2548
2549	BUG_ON(ptr > buf + report->size);
2550out:
2551	return buf;
2552}
2553
2554int ipl_report_free(struct ipl_report *report)
2555{
2556	struct ipl_report_component *comp, *ncomp;
2557	struct ipl_report_certificate *cert, *ncert;
2558
2559	list_for_each_entry_safe(comp, ncomp, &report->components, list)
2560		vfree(comp);
2561
2562	list_for_each_entry_safe(cert, ncert, &report->certificates, list)
2563		vfree(cert);
2564
2565	vfree(report);
2566
2567	return 0;
2568}
2569
2570#endif