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 <linux/vmalloc.h>
  24#include <asm/asm-extable.h>
  25#include <asm/diag.h>
  26#include <asm/ipl.h>
  27#include <asm/smp.h>
  28#include <asm/setup.h>
  29#include <asm/cpcmd.h>
  30#include <asm/ebcdic.h>
  31#include <asm/sclp.h>
  32#include <asm/checksum.h>
  33#include <asm/debug.h>
  34#include <asm/abs_lowcore.h>
  35#include <asm/os_info.h>
  36#include <asm/sections.h>
  37#include <asm/boot_data.h>
  38#include "entry.h"
  39
  40#define IPL_PARM_BLOCK_VERSION 0
  41
  42#define IPL_UNKNOWN_STR		"unknown"
  43#define IPL_CCW_STR		"ccw"
  44#define IPL_ECKD_STR		"eckd"
  45#define IPL_ECKD_DUMP_STR	"eckd_dump"
  46#define IPL_FCP_STR		"fcp"
  47#define IPL_FCP_DUMP_STR	"fcp_dump"
  48#define IPL_NVME_STR		"nvme"
  49#define IPL_NVME_DUMP_STR	"nvme_dump"
  50#define IPL_NSS_STR		"nss"
  51
  52#define DUMP_CCW_STR		"ccw"
  53#define DUMP_ECKD_STR		"eckd"
  54#define DUMP_FCP_STR		"fcp"
  55#define DUMP_NVME_STR		"nvme"
  56#define DUMP_NONE_STR		"none"
  57
  58/*
  59 * Four shutdown trigger types are supported:
  60 * - panic
  61 * - halt
  62 * - power off
  63 * - reipl
  64 * - restart
  65 */
  66#define ON_PANIC_STR		"on_panic"
  67#define ON_HALT_STR		"on_halt"
  68#define ON_POFF_STR		"on_poff"
  69#define ON_REIPL_STR		"on_reboot"
  70#define ON_RESTART_STR		"on_restart"
  71
  72struct shutdown_action;
  73struct shutdown_trigger {
  74	char *name;
  75	struct shutdown_action *action;
  76};
  77
  78/*
  79 * The following shutdown action types are supported:
  80 */
  81#define SHUTDOWN_ACTION_IPL_STR		"ipl"
  82#define SHUTDOWN_ACTION_REIPL_STR	"reipl"
  83#define SHUTDOWN_ACTION_DUMP_STR	"dump"
  84#define SHUTDOWN_ACTION_VMCMD_STR	"vmcmd"
  85#define SHUTDOWN_ACTION_STOP_STR	"stop"
  86#define SHUTDOWN_ACTION_DUMP_REIPL_STR	"dump_reipl"
  87
  88struct shutdown_action {
  89	char *name;
  90	void (*fn) (struct shutdown_trigger *trigger);
  91	int (*init) (void);
  92	int init_rc;
  93};
  94
  95static char *ipl_type_str(enum ipl_type type)
  96{
  97	switch (type) {
  98	case IPL_TYPE_CCW:
  99		return IPL_CCW_STR;
 100	case IPL_TYPE_ECKD:
 101		return IPL_ECKD_STR;
 102	case IPL_TYPE_ECKD_DUMP:
 103		return IPL_ECKD_DUMP_STR;
 104	case IPL_TYPE_FCP:
 105		return IPL_FCP_STR;
 106	case IPL_TYPE_FCP_DUMP:
 107		return IPL_FCP_DUMP_STR;
 108	case IPL_TYPE_NSS:
 109		return IPL_NSS_STR;
 110	case IPL_TYPE_NVME:
 111		return IPL_NVME_STR;
 112	case IPL_TYPE_NVME_DUMP:
 113		return IPL_NVME_DUMP_STR;
 114	case IPL_TYPE_UNKNOWN:
 115	default:
 116		return IPL_UNKNOWN_STR;
 117	}
 118}
 119
 120enum dump_type {
 121	DUMP_TYPE_NONE	= 1,
 122	DUMP_TYPE_CCW	= 2,
 123	DUMP_TYPE_FCP	= 4,
 124	DUMP_TYPE_NVME	= 8,
 125	DUMP_TYPE_ECKD	= 16,
 126};
 127
 128static char *dump_type_str(enum dump_type type)
 129{
 130	switch (type) {
 131	case DUMP_TYPE_NONE:
 132		return DUMP_NONE_STR;
 133	case DUMP_TYPE_CCW:
 134		return DUMP_CCW_STR;
 135	case DUMP_TYPE_ECKD:
 136		return DUMP_ECKD_STR;
 137	case DUMP_TYPE_FCP:
 138		return DUMP_FCP_STR;
 139	case DUMP_TYPE_NVME:
 140		return DUMP_NVME_STR;
 141	default:
 142		return NULL;
 143	}
 144}
 145
 146int __bootdata_preserved(ipl_block_valid);
 147struct ipl_parameter_block __bootdata_preserved(ipl_block);
 148int __bootdata_preserved(ipl_secure_flag);
 149
 150unsigned long __bootdata_preserved(ipl_cert_list_addr);
 151unsigned long __bootdata_preserved(ipl_cert_list_size);
 152
 153unsigned long __bootdata(early_ipl_comp_list_addr);
 154unsigned long __bootdata(early_ipl_comp_list_size);
 155
 156static int reipl_capabilities = IPL_TYPE_UNKNOWN;
 157
 158static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
 159static struct ipl_parameter_block *reipl_block_fcp;
 160static struct ipl_parameter_block *reipl_block_nvme;
 161static struct ipl_parameter_block *reipl_block_ccw;
 162static struct ipl_parameter_block *reipl_block_eckd;
 163static struct ipl_parameter_block *reipl_block_nss;
 164static struct ipl_parameter_block *reipl_block_actual;
 165
 166static int dump_capabilities = DUMP_TYPE_NONE;
 167static enum dump_type dump_type = DUMP_TYPE_NONE;
 168static struct ipl_parameter_block *dump_block_fcp;
 169static struct ipl_parameter_block *dump_block_nvme;
 170static struct ipl_parameter_block *dump_block_ccw;
 171static struct ipl_parameter_block *dump_block_eckd;
 172
 173static struct sclp_ipl_info sclp_ipl_info;
 174
 175static bool reipl_nvme_clear;
 176static bool reipl_fcp_clear;
 177static bool reipl_ccw_clear;
 178static bool reipl_eckd_clear;
 179
 180static unsigned long os_info_flags;
 181
 182static inline int __diag308(unsigned long subcode, unsigned long addr)
 183{
 184	union register_pair r1;
 185
 186	r1.even = addr;
 187	r1.odd	= 0;
 188	asm volatile(
 189		"	diag	%[r1],%[subcode],0x308\n"
 190		"0:	nopr	%%r7\n"
 191		EX_TABLE(0b,0b)
 192		: [r1] "+&d" (r1.pair)
 193		: [subcode] "d" (subcode)
 194		: "cc", "memory");
 195	return r1.odd;
 196}
 197
 198int diag308(unsigned long subcode, void *addr)
 199{
 200	diag_stat_inc(DIAG_STAT_X308);
 201	return __diag308(subcode, addr ? virt_to_phys(addr) : 0);
 202}
 203EXPORT_SYMBOL_GPL(diag308);
 204
 205/* SYSFS */
 206
 207#define IPL_ATTR_SHOW_FN(_prefix, _name, _format, args...)		\
 208static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,	\
 209		struct kobj_attribute *attr,				\
 210		char *page)						\
 211{									\
 212	return sysfs_emit(page, _format, ##args);			\
 213}
 214
 215#define IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk)			\
 216static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,	\
 217		struct kobj_attribute *attr,				\
 218		const char *buf, size_t len)				\
 219{									\
 220	unsigned long long ssid, devno;					\
 221									\
 222	if (sscanf(buf, "0.%llx.%llx\n", &ssid, &devno) != 2)		\
 223		return -EINVAL;						\
 224									\
 225	if (ssid > __MAX_SSID || devno > __MAX_SUBCHANNEL)		\
 226		return -EINVAL;						\
 227									\
 228	_ipl_blk.ssid = ssid;						\
 229	_ipl_blk.devno = devno;						\
 230	return len;							\
 231}
 232
 233#define DEFINE_IPL_CCW_ATTR_RW(_prefix, _name, _ipl_blk)		\
 234IPL_ATTR_SHOW_FN(_prefix, _name, "0.%x.%04x\n",				\
 235		 _ipl_blk.ssid, _ipl_blk.devno);			\
 236IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk);			\
 237static struct kobj_attribute sys_##_prefix##_##_name##_attr =		\
 238	__ATTR(_name, 0644,						\
 239	       sys_##_prefix##_##_name##_show,				\
 240	       sys_##_prefix##_##_name##_store)				\
 241
 242#define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value)		\
 243IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value)			\
 244static struct kobj_attribute sys_##_prefix##_##_name##_attr =		\
 245	__ATTR(_name, 0444, sys_##_prefix##_##_name##_show, NULL)
 246
 247#define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)	\
 248IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value)	\
 249static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,	\
 250		struct kobj_attribute *attr,				\
 251		const char *buf, size_t len)				\
 252{									\
 253	unsigned long long value;					\
 254	if (sscanf(buf, _fmt_in, &value) != 1)				\
 255		return -EINVAL;						\
 256	_value = value;							\
 257	return len;							\
 258}									\
 259static struct kobj_attribute sys_##_prefix##_##_name##_attr =		\
 260	__ATTR(_name, 0644,						\
 261			sys_##_prefix##_##_name##_show,			\
 262			sys_##_prefix##_##_name##_store)
 263
 264#define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
 265IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, _value)			\
 266static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,	\
 267		struct kobj_attribute *attr,				\
 268		const char *buf, size_t len)				\
 269{									\
 270	if (len >= sizeof(_value))					\
 271		return -E2BIG;						\
 272	len = strscpy(_value, buf, sizeof(_value));			\
 273	if ((ssize_t)len < 0)						\
 274		return len;						\
 275	strim(_value);							\
 276	return len;							\
 277}									\
 278static struct kobj_attribute sys_##_prefix##_##_name##_attr =		\
 279	__ATTR(_name, 0644,						\
 280			sys_##_prefix##_##_name##_show,			\
 281			sys_##_prefix##_##_name##_store)
 282
 283#define IPL_ATTR_SCP_DATA_SHOW_FN(_prefix, _ipl_block)			\
 284static ssize_t sys_##_prefix##_scp_data_show(struct file *filp,		\
 285					    struct kobject *kobj,	\
 286					    struct bin_attribute *attr,	\
 287					    char *buf, loff_t off,	\
 288					    size_t count)		\
 289{									\
 290	size_t size = _ipl_block.scp_data_len;				\
 291	void *scp_data = _ipl_block.scp_data;				\
 292									\
 293	return memory_read_from_buffer(buf, count, &off,		\
 294				       scp_data, size);			\
 295}
 296
 297#define IPL_ATTR_SCP_DATA_STORE_FN(_prefix, _ipl_block_hdr, _ipl_block, _ipl_bp_len, _ipl_bp0_len)\
 298static ssize_t sys_##_prefix##_scp_data_store(struct file *filp,	\
 299					struct kobject *kobj,		\
 300					struct bin_attribute *attr,	\
 301					char *buf, loff_t off,		\
 302					size_t count)			\
 303{									\
 304	size_t scpdata_len = count;					\
 305	size_t padding;							\
 306									\
 307	if (off)							\
 308		return -EINVAL;						\
 309									\
 310	memcpy(_ipl_block.scp_data, buf, count);			\
 311	if (scpdata_len % 8) {						\
 312		padding = 8 - (scpdata_len % 8);			\
 313		memset(_ipl_block.scp_data + scpdata_len,		\
 314		       0, padding);					\
 315		scpdata_len += padding;					\
 316	}								\
 317									\
 318	_ipl_block_hdr.len = _ipl_bp_len + scpdata_len;			\
 319	_ipl_block.len = _ipl_bp0_len + scpdata_len;			\
 320	_ipl_block.scp_data_len = scpdata_len;				\
 321									\
 322	return count;							\
 323}
 324
 325#define DEFINE_IPL_ATTR_SCP_DATA_RO(_prefix, _ipl_block, _size)		\
 326IPL_ATTR_SCP_DATA_SHOW_FN(_prefix, _ipl_block)				\
 327static struct bin_attribute sys_##_prefix##_scp_data_attr =		\
 328	__BIN_ATTR(scp_data, 0444, sys_##_prefix##_scp_data_show,	\
 329		   NULL, _size)
 330
 331#define DEFINE_IPL_ATTR_SCP_DATA_RW(_prefix, _ipl_block_hdr, _ipl_block, _ipl_bp_len, _ipl_bp0_len, _size)\
 332IPL_ATTR_SCP_DATA_SHOW_FN(_prefix, _ipl_block)					\
 333IPL_ATTR_SCP_DATA_STORE_FN(_prefix, _ipl_block_hdr, _ipl_block, _ipl_bp_len, _ipl_bp0_len)\
 334static struct bin_attribute sys_##_prefix##_scp_data_attr =			\
 335	__BIN_ATTR(scp_data, 0644, sys_##_prefix##_scp_data_show,		\
 336		   sys_##_prefix##_scp_data_store, _size)
 337
 338/*
 339 * ipl section
 340 */
 341
 342static __init enum ipl_type get_ipl_type(void)
 343{
 344	if (!ipl_block_valid)
 345		return IPL_TYPE_UNKNOWN;
 346
 347	switch (ipl_block.pb0_hdr.pbt) {
 348	case IPL_PBT_CCW:
 349		return IPL_TYPE_CCW;
 350	case IPL_PBT_FCP:
 351		if (ipl_block.fcp.opt == IPL_PB0_FCP_OPT_DUMP)
 352			return IPL_TYPE_FCP_DUMP;
 353		else
 354			return IPL_TYPE_FCP;
 355	case IPL_PBT_NVME:
 356		if (ipl_block.nvme.opt == IPL_PB0_NVME_OPT_DUMP)
 357			return IPL_TYPE_NVME_DUMP;
 358		else
 359			return IPL_TYPE_NVME;
 360	case IPL_PBT_ECKD:
 361		if (ipl_block.eckd.opt == IPL_PB0_ECKD_OPT_DUMP)
 362			return IPL_TYPE_ECKD_DUMP;
 363		else
 364			return IPL_TYPE_ECKD;
 365	}
 366	return IPL_TYPE_UNKNOWN;
 367}
 368
 369struct ipl_info ipl_info;
 370EXPORT_SYMBOL_GPL(ipl_info);
 371
 372static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
 373			     char *page)
 374{
 375	return sysfs_emit(page, "%s\n", ipl_type_str(ipl_info.type));
 376}
 377
 378static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
 379
 380static ssize_t ipl_secure_show(struct kobject *kobj,
 381			       struct kobj_attribute *attr, char *page)
 382{
 383	return sysfs_emit(page, "%i\n", !!ipl_secure_flag);
 384}
 385
 386static struct kobj_attribute sys_ipl_secure_attr =
 387	__ATTR(secure, 0444, ipl_secure_show, NULL);
 388
 389static ssize_t ipl_has_secure_show(struct kobject *kobj,
 390				   struct kobj_attribute *attr, char *page)
 391{
 392	return sysfs_emit(page, "%i\n", !!sclp.has_sipl);
 393}
 394
 395static struct kobj_attribute sys_ipl_has_secure_attr =
 396	__ATTR(has_secure, 0444, ipl_has_secure_show, NULL);
 397
 398static ssize_t ipl_vm_parm_show(struct kobject *kobj,
 399				struct kobj_attribute *attr, char *page)
 400{
 401	char parm[DIAG308_VMPARM_SIZE + 1] = {};
 402
 403	if (ipl_block_valid && (ipl_block.pb0_hdr.pbt == IPL_PBT_CCW))
 404		ipl_block_get_ascii_vmparm(parm, sizeof(parm), &ipl_block);
 405	return sysfs_emit(page, "%s\n", parm);
 406}
 407
 408static struct kobj_attribute sys_ipl_vm_parm_attr =
 409	__ATTR(parm, 0444, ipl_vm_parm_show, NULL);
 410
 411static ssize_t sys_ipl_device_show(struct kobject *kobj,
 412				   struct kobj_attribute *attr, char *page)
 413{
 414	switch (ipl_info.type) {
 415	case IPL_TYPE_CCW:
 416		return sysfs_emit(page, "0.%x.%04x\n", ipl_block.ccw.ssid,
 417				  ipl_block.ccw.devno);
 418	case IPL_TYPE_ECKD:
 419	case IPL_TYPE_ECKD_DUMP:
 420		return sysfs_emit(page, "0.%x.%04x\n", ipl_block.eckd.ssid,
 421				  ipl_block.eckd.devno);
 422	case IPL_TYPE_FCP:
 423	case IPL_TYPE_FCP_DUMP:
 424		return sysfs_emit(page, "0.0.%04x\n", ipl_block.fcp.devno);
 425	case IPL_TYPE_NVME:
 426	case IPL_TYPE_NVME_DUMP:
 427		return sysfs_emit(page, "%08ux\n", ipl_block.nvme.fid);
 428	default:
 429		return 0;
 430	}
 431}
 432
 433static struct kobj_attribute sys_ipl_device_attr =
 434	__ATTR(device, 0444, sys_ipl_device_show, NULL);
 435
 436static ssize_t sys_ipl_parameter_read(struct file *filp, struct kobject *kobj,
 437				      struct bin_attribute *attr, char *buf,
 438				      loff_t off, size_t count)
 439{
 440	return memory_read_from_buffer(buf, count, &off, &ipl_block,
 441				       ipl_block.hdr.len);
 442}
 443static struct bin_attribute sys_ipl_parameter_attr =
 444	__BIN_ATTR(binary_parameter, 0444, sys_ipl_parameter_read, NULL,
 445		   PAGE_SIZE);
 446
 447DEFINE_IPL_ATTR_SCP_DATA_RO(ipl_fcp, ipl_block.fcp, PAGE_SIZE);
 
 
 
 
 
 448
 449static struct bin_attribute *ipl_fcp_bin_attrs[] = {
 450	&sys_ipl_parameter_attr,
 451	&sys_ipl_fcp_scp_data_attr,
 452	NULL,
 453};
 454
 455DEFINE_IPL_ATTR_SCP_DATA_RO(ipl_nvme, ipl_block.nvme, PAGE_SIZE);
 
 
 
 
 
 456
 457static struct bin_attribute *ipl_nvme_bin_attrs[] = {
 458	&sys_ipl_parameter_attr,
 459	&sys_ipl_nvme_scp_data_attr,
 
 
 
 
 
 
 
 
 
 460	NULL,
 461};
 462
 463DEFINE_IPL_ATTR_SCP_DATA_RO(ipl_eckd, ipl_block.eckd, PAGE_SIZE);
 464
 465static struct bin_attribute *ipl_eckd_bin_attrs[] = {
 466	&sys_ipl_parameter_attr,
 467	&sys_ipl_eckd_scp_data_attr,
 468	NULL,
 469};
 470
 471/* FCP ipl device attributes */
 472
 473DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n",
 474		   (unsigned long long)ipl_block.fcp.wwpn);
 475DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n",
 476		   (unsigned long long)ipl_block.fcp.lun);
 477DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n",
 478		   (unsigned long long)ipl_block.fcp.bootprog);
 479DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n",
 480		   (unsigned long long)ipl_block.fcp.br_lba);
 481
 482/* NVMe ipl device attributes */
 483DEFINE_IPL_ATTR_RO(ipl_nvme, fid, "0x%08llx\n",
 484		   (unsigned long long)ipl_block.nvme.fid);
 485DEFINE_IPL_ATTR_RO(ipl_nvme, nsid, "0x%08llx\n",
 486		   (unsigned long long)ipl_block.nvme.nsid);
 487DEFINE_IPL_ATTR_RO(ipl_nvme, bootprog, "%lld\n",
 488		   (unsigned long long)ipl_block.nvme.bootprog);
 489DEFINE_IPL_ATTR_RO(ipl_nvme, br_lba, "%lld\n",
 490		   (unsigned long long)ipl_block.nvme.br_lba);
 491
 492/* ECKD ipl device attributes */
 493DEFINE_IPL_ATTR_RO(ipl_eckd, bootprog, "%lld\n",
 494		   (unsigned long long)ipl_block.eckd.bootprog);
 495
 496#define IPL_ATTR_BR_CHR_SHOW_FN(_name, _ipb)				\
 497static ssize_t eckd_##_name##_br_chr_show(struct kobject *kobj,		\
 498					  struct kobj_attribute *attr,	\
 499					  char *buf)			\
 500{									\
 501	struct ipl_pb0_eckd *ipb = &(_ipb);				\
 502									\
 503	if (!ipb->br_chr.cyl &&						\
 504	    !ipb->br_chr.head &&					\
 505	    !ipb->br_chr.record)					\
 506		return sysfs_emit(buf, "auto\n");			\
 507									\
 508	return sysfs_emit(buf, "0x%x,0x%x,0x%x\n",			\
 509			  ipb->br_chr.cyl,				\
 510			  ipb->br_chr.head,				\
 511			  ipb->br_chr.record);				\
 512}
 513
 514#define IPL_ATTR_BR_CHR_STORE_FN(_name, _ipb)				\
 515static ssize_t eckd_##_name##_br_chr_store(struct kobject *kobj,	\
 516					   struct kobj_attribute *attr,	\
 517					   const char *buf, size_t len)	\
 518{									\
 519	struct ipl_pb0_eckd *ipb = &(_ipb);				\
 520	unsigned long args[3] = { 0 };					\
 521	char *p, *p1, *tmp = NULL;					\
 522	int i, rc;							\
 523									\
 524	if (!strncmp(buf, "auto", 4))					\
 525		goto out;						\
 526									\
 527	tmp = kstrdup(buf, GFP_KERNEL);					\
 528	p = tmp;							\
 529	for (i = 0; i < 3; i++) {					\
 530		p1 = strsep(&p, ", ");					\
 531		if (!p1) {						\
 532			rc = -EINVAL;					\
 533			goto err;					\
 534		}							\
 535		rc = kstrtoul(p1, 0, args + i);				\
 536		if (rc)							\
 537			goto err;					\
 538	}								\
 539									\
 540	rc = -EINVAL;							\
 541	if (i != 3)							\
 542		goto err;						\
 543									\
 544	if ((args[0] || args[1]) && !args[2])				\
 545		goto err;						\
 546									\
 547	if (args[0] > UINT_MAX || args[1] > 255 || args[2] > 255)	\
 548		goto err;						\
 549									\
 550out:									\
 551	ipb->br_chr.cyl = args[0];					\
 552	ipb->br_chr.head = args[1];					\
 553	ipb->br_chr.record = args[2];					\
 554	rc = len;							\
 555err:									\
 556	kfree(tmp);							\
 557	return rc;							\
 558}
 559
 560IPL_ATTR_BR_CHR_SHOW_FN(ipl, ipl_block.eckd);
 561static struct kobj_attribute sys_ipl_eckd_br_chr_attr =
 562	__ATTR(br_chr, 0644, eckd_ipl_br_chr_show, NULL);
 563
 564IPL_ATTR_BR_CHR_SHOW_FN(reipl, reipl_block_eckd->eckd);
 565IPL_ATTR_BR_CHR_STORE_FN(reipl, reipl_block_eckd->eckd);
 566
 567static struct kobj_attribute sys_reipl_eckd_br_chr_attr =
 568	__ATTR(br_chr, 0644, eckd_reipl_br_chr_show, eckd_reipl_br_chr_store);
 569
 570static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
 571				     struct kobj_attribute *attr, char *page)
 572{
 573	char loadparm[LOADPARM_LEN + 1] = {};
 574
 575	if (!sclp_ipl_info.is_valid)
 576		return sysfs_emit(page, "#unknown#\n");
 577	memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
 578	EBCASC(loadparm, LOADPARM_LEN);
 579	strim(loadparm);
 580	return sysfs_emit(page, "%s\n", loadparm);
 581}
 582
 583static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
 584	__ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
 585
 586static struct attribute *ipl_fcp_attrs[] = {
 
 587	&sys_ipl_device_attr.attr,
 588	&sys_ipl_fcp_wwpn_attr.attr,
 589	&sys_ipl_fcp_lun_attr.attr,
 590	&sys_ipl_fcp_bootprog_attr.attr,
 591	&sys_ipl_fcp_br_lba_attr.attr,
 592	&sys_ipl_ccw_loadparm_attr.attr,
 
 
 593	NULL,
 594};
 595
 596static struct attribute_group ipl_fcp_attr_group = {
 597	.attrs = ipl_fcp_attrs,
 598	.bin_attrs = ipl_fcp_bin_attrs,
 599};
 600
 601static struct attribute *ipl_nvme_attrs[] = {
 
 602	&sys_ipl_nvme_fid_attr.attr,
 603	&sys_ipl_nvme_nsid_attr.attr,
 604	&sys_ipl_nvme_bootprog_attr.attr,
 605	&sys_ipl_nvme_br_lba_attr.attr,
 606	&sys_ipl_ccw_loadparm_attr.attr,
 
 
 607	NULL,
 608};
 609
 610static struct attribute_group ipl_nvme_attr_group = {
 611	.attrs = ipl_nvme_attrs,
 612	.bin_attrs = ipl_nvme_bin_attrs,
 613};
 614
 615static struct attribute *ipl_eckd_attrs[] = {
 616	&sys_ipl_eckd_bootprog_attr.attr,
 617	&sys_ipl_eckd_br_chr_attr.attr,
 618	&sys_ipl_ccw_loadparm_attr.attr,
 619	&sys_ipl_device_attr.attr,
 620	NULL,
 621};
 622
 623static struct attribute_group ipl_eckd_attr_group = {
 624	.attrs = ipl_eckd_attrs,
 625	.bin_attrs = ipl_eckd_bin_attrs,
 626};
 627
 628/* CCW ipl device attributes */
 629
 630static struct attribute *ipl_ccw_attrs_vm[] = {
 
 631	&sys_ipl_device_attr.attr,
 632	&sys_ipl_ccw_loadparm_attr.attr,
 633	&sys_ipl_vm_parm_attr.attr,
 
 
 634	NULL,
 635};
 636
 637static struct attribute *ipl_ccw_attrs_lpar[] = {
 
 638	&sys_ipl_device_attr.attr,
 639	&sys_ipl_ccw_loadparm_attr.attr,
 
 
 640	NULL,
 641};
 642
 643static struct attribute_group ipl_ccw_attr_group_vm = {
 644	.attrs = ipl_ccw_attrs_vm,
 645};
 646
 647static struct attribute_group ipl_ccw_attr_group_lpar = {
 648	.attrs = ipl_ccw_attrs_lpar
 649};
 650
 651static struct attribute *ipl_common_attrs[] = {
 
 
 652	&sys_ipl_type_attr.attr,
 653	&sys_ipl_secure_attr.attr,
 654	&sys_ipl_has_secure_attr.attr,
 655	NULL,
 656};
 657
 658static struct attribute_group ipl_common_attr_group = {
 659	.attrs = ipl_common_attrs,
 660};
 661
 662static struct kset *ipl_kset;
 663
 664static void __ipl_run(void *unused)
 665{
 
 666	diag308(DIAG308_LOAD_CLEAR, NULL);
 667}
 668
 669static void ipl_run(struct shutdown_trigger *trigger)
 670{
 671	smp_call_ipl_cpu(__ipl_run, NULL);
 672}
 673
 674static int __init ipl_init(void)
 675{
 676	int rc;
 677
 678	ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
 679	if (!ipl_kset) {
 680		rc = -ENOMEM;
 681		goto out;
 682	}
 683	rc = sysfs_create_group(&ipl_kset->kobj, &ipl_common_attr_group);
 684	if (rc)
 685		goto out;
 686	switch (ipl_info.type) {
 687	case IPL_TYPE_CCW:
 688		if (MACHINE_IS_VM)
 689			rc = sysfs_create_group(&ipl_kset->kobj,
 690						&ipl_ccw_attr_group_vm);
 691		else
 692			rc = sysfs_create_group(&ipl_kset->kobj,
 693						&ipl_ccw_attr_group_lpar);
 694		break;
 695	case IPL_TYPE_ECKD:
 696	case IPL_TYPE_ECKD_DUMP:
 697		rc = sysfs_create_group(&ipl_kset->kobj, &ipl_eckd_attr_group);
 698		break;
 699	case IPL_TYPE_FCP:
 700	case IPL_TYPE_FCP_DUMP:
 701		rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
 702		break;
 703	case IPL_TYPE_NVME:
 704	case IPL_TYPE_NVME_DUMP:
 705		rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nvme_attr_group);
 706		break;
 707	default:
 
 
 708		break;
 709	}
 710out:
 711	if (rc)
 712		panic("ipl_init failed: rc = %i\n", rc);
 713
 714	return 0;
 715}
 716
 717static struct shutdown_action __refdata ipl_action = {
 718	.name	= SHUTDOWN_ACTION_IPL_STR,
 719	.fn	= ipl_run,
 720	.init	= ipl_init,
 721};
 722
 723/*
 724 * reipl shutdown action: Reboot Linux on shutdown.
 725 */
 726
 727/* VM IPL PARM attributes */
 728static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
 729					  char *page)
 730{
 731	char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
 732
 733	ipl_block_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
 734	return sysfs_emit(page, "%s\n", vmparm);
 735}
 736
 737static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
 738					  size_t vmparm_max,
 739					  const char *buf, size_t len)
 740{
 741	int i, ip_len;
 742
 743	/* ignore trailing newline */
 744	ip_len = len;
 745	if ((len > 0) && (buf[len - 1] == '\n'))
 746		ip_len--;
 747
 748	if (ip_len > vmparm_max)
 749		return -EINVAL;
 750
 751	/* parm is used to store kernel options, check for common chars */
 752	for (i = 0; i < ip_len; i++)
 753		if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
 754			return -EINVAL;
 755
 756	memset(ipb->ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
 757	ipb->ccw.vm_parm_len = ip_len;
 758	if (ip_len > 0) {
 759		ipb->ccw.vm_flags |= IPL_PB0_CCW_VM_FLAG_VP;
 760		memcpy(ipb->ccw.vm_parm, buf, ip_len);
 761		ASCEBC(ipb->ccw.vm_parm, ip_len);
 762	} else {
 763		ipb->ccw.vm_flags &= ~IPL_PB0_CCW_VM_FLAG_VP;
 764	}
 765
 766	return len;
 767}
 768
 769/* NSS wrapper */
 770static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
 771				     struct kobj_attribute *attr, char *page)
 772{
 773	return reipl_generic_vmparm_show(reipl_block_nss, page);
 774}
 775
 776static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
 777				      struct kobj_attribute *attr,
 778				      const char *buf, size_t len)
 779{
 780	return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
 781}
 782
 783/* CCW wrapper */
 784static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
 785				     struct kobj_attribute *attr, char *page)
 786{
 787	return reipl_generic_vmparm_show(reipl_block_ccw, page);
 788}
 789
 790static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
 791				      struct kobj_attribute *attr,
 792				      const char *buf, size_t len)
 793{
 794	return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
 795}
 796
 797static struct kobj_attribute sys_reipl_nss_vmparm_attr =
 798	__ATTR(parm, 0644, reipl_nss_vmparm_show,
 799	       reipl_nss_vmparm_store);
 800static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
 801	__ATTR(parm, 0644, reipl_ccw_vmparm_show,
 802	       reipl_ccw_vmparm_store);
 803
 804/* FCP reipl device attributes */
 805
 806DEFINE_IPL_ATTR_SCP_DATA_RW(reipl_fcp, reipl_block_fcp->hdr,
 807			    reipl_block_fcp->fcp,
 808			    IPL_BP_FCP_LEN, IPL_BP0_FCP_LEN,
 809			    DIAG308_SCPDATA_SIZE);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 810
 811static struct bin_attribute *reipl_fcp_bin_attrs[] = {
 812	&sys_reipl_fcp_scp_data_attr,
 813	NULL,
 814};
 815
 816DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n",
 817		   reipl_block_fcp->fcp.wwpn);
 818DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n",
 819		   reipl_block_fcp->fcp.lun);
 820DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
 821		   reipl_block_fcp->fcp.bootprog);
 822DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
 823		   reipl_block_fcp->fcp.br_lba);
 824DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
 825		   reipl_block_fcp->fcp.devno);
 826
 827static void reipl_get_ascii_loadparm(char *loadparm,
 828				     struct ipl_parameter_block *ibp)
 829{
 830	memcpy(loadparm, ibp->common.loadparm, LOADPARM_LEN);
 831	EBCASC(loadparm, LOADPARM_LEN);
 832	loadparm[LOADPARM_LEN] = 0;
 833	strim(loadparm);
 834}
 835
 836static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
 837					   char *page)
 838{
 839	char buf[LOADPARM_LEN + 1];
 840
 841	reipl_get_ascii_loadparm(buf, ipb);
 842	return sysfs_emit(page, "%s\n", buf);
 843}
 844
 845static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
 846					    const char *buf, size_t len)
 847{
 848	int i, lp_len;
 849
 850	/* ignore trailing newline */
 851	lp_len = len;
 852	if ((len > 0) && (buf[len - 1] == '\n'))
 853		lp_len--;
 854	/* loadparm can have max 8 characters and must not start with a blank */
 855	if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
 856		return -EINVAL;
 857	/* loadparm can only contain "a-z,A-Z,0-9,SP,." */
 858	for (i = 0; i < lp_len; i++) {
 859		if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
 860		    (buf[i] == '.'))
 861			continue;
 862		return -EINVAL;
 863	}
 864	/* initialize loadparm with blanks */
 865	memset(ipb->common.loadparm, ' ', LOADPARM_LEN);
 866	/* copy and convert to ebcdic */
 867	memcpy(ipb->common.loadparm, buf, lp_len);
 868	ASCEBC(ipb->common.loadparm, LOADPARM_LEN);
 869	ipb->common.flags |= IPL_PB0_FLAG_LOADPARM;
 870	return len;
 871}
 872
 873#define DEFINE_GENERIC_LOADPARM(name)							\
 874static ssize_t reipl_##name##_loadparm_show(struct kobject *kobj,			\
 875					    struct kobj_attribute *attr, char *page)	\
 876{											\
 877	return reipl_generic_loadparm_show(reipl_block_##name, page);			\
 878}											\
 879static ssize_t reipl_##name##_loadparm_store(struct kobject *kobj,			\
 880					     struct kobj_attribute *attr,		\
 881					     const char *buf, size_t len)		\
 882{											\
 883	return reipl_generic_loadparm_store(reipl_block_##name, buf, len);		\
 884}											\
 885static struct kobj_attribute sys_reipl_##name##_loadparm_attr =				\
 886	__ATTR(loadparm, 0644, reipl_##name##_loadparm_show,				\
 887	       reipl_##name##_loadparm_store)
 888
 889DEFINE_GENERIC_LOADPARM(fcp);
 890DEFINE_GENERIC_LOADPARM(nvme);
 891DEFINE_GENERIC_LOADPARM(ccw);
 892DEFINE_GENERIC_LOADPARM(nss);
 893DEFINE_GENERIC_LOADPARM(eckd);
 894
 895static ssize_t reipl_fcp_clear_show(struct kobject *kobj,
 896				    struct kobj_attribute *attr, char *page)
 897{
 898	return sysfs_emit(page, "%u\n", reipl_fcp_clear);
 899}
 900
 901static ssize_t reipl_fcp_clear_store(struct kobject *kobj,
 902				     struct kobj_attribute *attr,
 903				     const char *buf, size_t len)
 904{
 905	if (kstrtobool(buf, &reipl_fcp_clear) < 0)
 906		return -EINVAL;
 907	return len;
 908}
 909
 910static struct attribute *reipl_fcp_attrs[] = {
 911	&sys_reipl_fcp_device_attr.attr,
 912	&sys_reipl_fcp_wwpn_attr.attr,
 913	&sys_reipl_fcp_lun_attr.attr,
 914	&sys_reipl_fcp_bootprog_attr.attr,
 915	&sys_reipl_fcp_br_lba_attr.attr,
 916	&sys_reipl_fcp_loadparm_attr.attr,
 917	NULL,
 918};
 919
 920static struct attribute_group reipl_fcp_attr_group = {
 921	.attrs = reipl_fcp_attrs,
 922	.bin_attrs = reipl_fcp_bin_attrs,
 923};
 924
 925static struct kobj_attribute sys_reipl_fcp_clear_attr =
 926	__ATTR(clear, 0644, reipl_fcp_clear_show, reipl_fcp_clear_store);
 927
 928/* NVME reipl device attributes */
 929
 930DEFINE_IPL_ATTR_SCP_DATA_RW(reipl_nvme, reipl_block_nvme->hdr,
 931			    reipl_block_nvme->nvme,
 932			    IPL_BP_NVME_LEN, IPL_BP0_NVME_LEN,
 933			    DIAG308_SCPDATA_SIZE);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 934
 935static struct bin_attribute *reipl_nvme_bin_attrs[] = {
 936	&sys_reipl_nvme_scp_data_attr,
 937	NULL,
 938};
 939
 940DEFINE_IPL_ATTR_RW(reipl_nvme, fid, "0x%08llx\n", "%llx\n",
 941		   reipl_block_nvme->nvme.fid);
 942DEFINE_IPL_ATTR_RW(reipl_nvme, nsid, "0x%08llx\n", "%llx\n",
 943		   reipl_block_nvme->nvme.nsid);
 944DEFINE_IPL_ATTR_RW(reipl_nvme, bootprog, "%lld\n", "%lld\n",
 945		   reipl_block_nvme->nvme.bootprog);
 946DEFINE_IPL_ATTR_RW(reipl_nvme, br_lba, "%lld\n", "%lld\n",
 947		   reipl_block_nvme->nvme.br_lba);
 948
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 949static struct attribute *reipl_nvme_attrs[] = {
 950	&sys_reipl_nvme_fid_attr.attr,
 951	&sys_reipl_nvme_nsid_attr.attr,
 952	&sys_reipl_nvme_bootprog_attr.attr,
 953	&sys_reipl_nvme_br_lba_attr.attr,
 954	&sys_reipl_nvme_loadparm_attr.attr,
 955	NULL,
 956};
 957
 958static struct attribute_group reipl_nvme_attr_group = {
 959	.attrs = reipl_nvme_attrs,
 960	.bin_attrs = reipl_nvme_bin_attrs
 961};
 962
 963static ssize_t reipl_nvme_clear_show(struct kobject *kobj,
 964				     struct kobj_attribute *attr, char *page)
 965{
 966	return sysfs_emit(page, "%u\n", reipl_nvme_clear);
 967}
 968
 969static ssize_t reipl_nvme_clear_store(struct kobject *kobj,
 970				      struct kobj_attribute *attr,
 971				      const char *buf, size_t len)
 972{
 973	if (kstrtobool(buf, &reipl_nvme_clear) < 0)
 974		return -EINVAL;
 975	return len;
 976}
 977
 978static struct kobj_attribute sys_reipl_nvme_clear_attr =
 979	__ATTR(clear, 0644, reipl_nvme_clear_show, reipl_nvme_clear_store);
 980
 981/* CCW reipl device attributes */
 982DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ccw);
 983
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 984static ssize_t reipl_ccw_clear_show(struct kobject *kobj,
 985				    struct kobj_attribute *attr, char *page)
 986{
 987	return sysfs_emit(page, "%u\n", reipl_ccw_clear);
 988}
 989
 990static ssize_t reipl_ccw_clear_store(struct kobject *kobj,
 991				     struct kobj_attribute *attr,
 992				     const char *buf, size_t len)
 993{
 994	if (kstrtobool(buf, &reipl_ccw_clear) < 0)
 995		return -EINVAL;
 996	return len;
 997}
 998
 999static struct kobj_attribute sys_reipl_ccw_clear_attr =
1000	__ATTR(clear, 0644, reipl_ccw_clear_show, reipl_ccw_clear_store);
1001
1002static struct attribute *reipl_ccw_attrs_vm[] = {
1003	&sys_reipl_ccw_device_attr.attr,
1004	&sys_reipl_ccw_loadparm_attr.attr,
1005	&sys_reipl_ccw_vmparm_attr.attr,
1006	&sys_reipl_ccw_clear_attr.attr,
1007	NULL,
1008};
1009
1010static struct attribute *reipl_ccw_attrs_lpar[] = {
1011	&sys_reipl_ccw_device_attr.attr,
1012	&sys_reipl_ccw_loadparm_attr.attr,
1013	&sys_reipl_ccw_clear_attr.attr,
1014	NULL,
1015};
1016
1017static struct attribute_group reipl_ccw_attr_group_vm = {
1018	.name  = IPL_CCW_STR,
1019	.attrs = reipl_ccw_attrs_vm,
1020};
1021
1022static struct attribute_group reipl_ccw_attr_group_lpar = {
1023	.name  = IPL_CCW_STR,
1024	.attrs = reipl_ccw_attrs_lpar,
1025};
1026
1027/* ECKD reipl device attributes */
1028
1029DEFINE_IPL_ATTR_SCP_DATA_RW(reipl_eckd, reipl_block_eckd->hdr,
1030			    reipl_block_eckd->eckd,
1031			    IPL_BP_ECKD_LEN, IPL_BP0_ECKD_LEN,
1032			    DIAG308_SCPDATA_SIZE);
1033
1034static struct bin_attribute *reipl_eckd_bin_attrs[] = {
1035	&sys_reipl_eckd_scp_data_attr,
1036	NULL,
1037};
1038
1039DEFINE_IPL_CCW_ATTR_RW(reipl_eckd, device, reipl_block_eckd->eckd);
1040DEFINE_IPL_ATTR_RW(reipl_eckd, bootprog, "%lld\n", "%lld\n",
1041		   reipl_block_eckd->eckd.bootprog);
1042
1043static struct attribute *reipl_eckd_attrs[] = {
1044	&sys_reipl_eckd_device_attr.attr,
1045	&sys_reipl_eckd_bootprog_attr.attr,
1046	&sys_reipl_eckd_br_chr_attr.attr,
1047	&sys_reipl_eckd_loadparm_attr.attr,
1048	NULL,
1049};
1050
1051static struct attribute_group reipl_eckd_attr_group = {
1052	.attrs = reipl_eckd_attrs,
1053	.bin_attrs = reipl_eckd_bin_attrs
1054};
1055
1056static ssize_t reipl_eckd_clear_show(struct kobject *kobj,
1057				     struct kobj_attribute *attr, char *page)
1058{
1059	return sysfs_emit(page, "%u\n", reipl_eckd_clear);
1060}
1061
1062static ssize_t reipl_eckd_clear_store(struct kobject *kobj,
1063				      struct kobj_attribute *attr,
1064				      const char *buf, size_t len)
1065{
1066	if (kstrtobool(buf, &reipl_eckd_clear) < 0)
1067		return -EINVAL;
1068	return len;
1069}
1070
1071static struct kobj_attribute sys_reipl_eckd_clear_attr =
1072	__ATTR(clear, 0644, reipl_eckd_clear_show, reipl_eckd_clear_store);
1073
1074/* NSS reipl device attributes */
1075static void reipl_get_ascii_nss_name(char *dst,
1076				     struct ipl_parameter_block *ipb)
1077{
1078	memcpy(dst, ipb->ccw.nss_name, NSS_NAME_SIZE);
1079	EBCASC(dst, NSS_NAME_SIZE);
1080	dst[NSS_NAME_SIZE] = 0;
1081}
1082
1083static ssize_t reipl_nss_name_show(struct kobject *kobj,
1084				   struct kobj_attribute *attr, char *page)
1085{
1086	char nss_name[NSS_NAME_SIZE + 1] = {};
1087
1088	reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
1089	return sysfs_emit(page, "%s\n", nss_name);
1090}
1091
1092static ssize_t reipl_nss_name_store(struct kobject *kobj,
1093				    struct kobj_attribute *attr,
1094				    const char *buf, size_t len)
1095{
1096	int nss_len;
1097
1098	/* ignore trailing newline */
1099	nss_len = len;
1100	if ((len > 0) && (buf[len - 1] == '\n'))
1101		nss_len--;
1102
1103	if (nss_len > NSS_NAME_SIZE)
1104		return -EINVAL;
1105
1106	memset(reipl_block_nss->ccw.nss_name, 0x40, NSS_NAME_SIZE);
1107	if (nss_len > 0) {
1108		reipl_block_nss->ccw.vm_flags |= IPL_PB0_CCW_VM_FLAG_NSS;
1109		memcpy(reipl_block_nss->ccw.nss_name, buf, nss_len);
1110		ASCEBC(reipl_block_nss->ccw.nss_name, nss_len);
1111		EBC_TOUPPER(reipl_block_nss->ccw.nss_name, nss_len);
1112	} else {
1113		reipl_block_nss->ccw.vm_flags &= ~IPL_PB0_CCW_VM_FLAG_NSS;
1114	}
1115
1116	return len;
1117}
1118
1119static struct kobj_attribute sys_reipl_nss_name_attr =
1120	__ATTR(name, 0644, reipl_nss_name_show,
1121	       reipl_nss_name_store);
 
 
 
 
1122
1123static struct attribute *reipl_nss_attrs[] = {
1124	&sys_reipl_nss_name_attr.attr,
1125	&sys_reipl_nss_loadparm_attr.attr,
1126	&sys_reipl_nss_vmparm_attr.attr,
1127	NULL,
1128};
1129
1130static struct attribute_group reipl_nss_attr_group = {
1131	.name  = IPL_NSS_STR,
1132	.attrs = reipl_nss_attrs,
1133};
1134
1135void set_os_info_reipl_block(void)
1136{
1137	os_info_entry_add_data(OS_INFO_REIPL_BLOCK, reipl_block_actual,
1138			       reipl_block_actual->hdr.len);
1139}
1140
1141/* reipl type */
1142
1143static int reipl_set_type(enum ipl_type type)
1144{
1145	if (!(reipl_capabilities & type))
1146		return -EINVAL;
1147
1148	switch(type) {
1149	case IPL_TYPE_CCW:
1150		reipl_block_actual = reipl_block_ccw;
1151		break;
1152	case IPL_TYPE_ECKD:
1153		reipl_block_actual = reipl_block_eckd;
1154		break;
1155	case IPL_TYPE_FCP:
1156		reipl_block_actual = reipl_block_fcp;
1157		break;
1158	case IPL_TYPE_NVME:
1159		reipl_block_actual = reipl_block_nvme;
1160		break;
1161	case IPL_TYPE_NSS:
1162		reipl_block_actual = reipl_block_nss;
1163		break;
1164	default:
1165		break;
1166	}
1167	reipl_type = type;
1168	return 0;
1169}
1170
1171static ssize_t reipl_type_show(struct kobject *kobj,
1172			       struct kobj_attribute *attr, char *page)
1173{
1174	return sysfs_emit(page, "%s\n", ipl_type_str(reipl_type));
1175}
1176
1177static ssize_t reipl_type_store(struct kobject *kobj,
1178				struct kobj_attribute *attr,
1179				const char *buf, size_t len)
1180{
1181	int rc = -EINVAL;
1182
1183	if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1184		rc = reipl_set_type(IPL_TYPE_CCW);
1185	else if (strncmp(buf, IPL_ECKD_STR, strlen(IPL_ECKD_STR)) == 0)
1186		rc = reipl_set_type(IPL_TYPE_ECKD);
1187	else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1188		rc = reipl_set_type(IPL_TYPE_FCP);
1189	else if (strncmp(buf, IPL_NVME_STR, strlen(IPL_NVME_STR)) == 0)
1190		rc = reipl_set_type(IPL_TYPE_NVME);
1191	else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1192		rc = reipl_set_type(IPL_TYPE_NSS);
1193	return (rc != 0) ? rc : len;
1194}
1195
1196static struct kobj_attribute reipl_type_attr =
1197	__ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
1198
1199static struct kset *reipl_kset;
1200static struct kset *reipl_fcp_kset;
1201static struct kset *reipl_nvme_kset;
1202static struct kset *reipl_eckd_kset;
1203
1204static void __reipl_run(void *unused)
1205{
1206	switch (reipl_type) {
1207	case IPL_TYPE_CCW:
1208		diag308(DIAG308_SET, reipl_block_ccw);
1209		if (reipl_ccw_clear)
1210			diag308(DIAG308_LOAD_CLEAR, NULL);
1211		else
1212			diag308(DIAG308_LOAD_NORMAL_DUMP, NULL);
1213		break;
1214	case IPL_TYPE_ECKD:
1215		diag308(DIAG308_SET, reipl_block_eckd);
1216		if (reipl_eckd_clear)
1217			diag308(DIAG308_LOAD_CLEAR, NULL);
1218		else
1219			diag308(DIAG308_LOAD_NORMAL, NULL);
1220		break;
1221	case IPL_TYPE_FCP:
1222		diag308(DIAG308_SET, reipl_block_fcp);
1223		if (reipl_fcp_clear)
1224			diag308(DIAG308_LOAD_CLEAR, NULL);
1225		else
1226			diag308(DIAG308_LOAD_NORMAL, NULL);
1227		break;
1228	case IPL_TYPE_NVME:
1229		diag308(DIAG308_SET, reipl_block_nvme);
1230		if (reipl_nvme_clear)
1231			diag308(DIAG308_LOAD_CLEAR, NULL);
1232		else
1233			diag308(DIAG308_LOAD_NORMAL, NULL);
1234		break;
1235	case IPL_TYPE_NSS:
1236		diag308(DIAG308_SET, reipl_block_nss);
1237		diag308(DIAG308_LOAD_CLEAR, NULL);
1238		break;
1239	case IPL_TYPE_UNKNOWN:
1240		diag308(DIAG308_LOAD_CLEAR, NULL);
1241		break;
1242	case IPL_TYPE_FCP_DUMP:
1243	case IPL_TYPE_NVME_DUMP:
1244	case IPL_TYPE_ECKD_DUMP:
1245		break;
1246	}
1247	disabled_wait();
1248}
1249
1250static void reipl_run(struct shutdown_trigger *trigger)
1251{
1252	smp_call_ipl_cpu(__reipl_run, NULL);
1253}
1254
1255static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
1256{
1257	ipb->hdr.len = IPL_BP_CCW_LEN;
1258	ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1259	ipb->pb0_hdr.len = IPL_BP0_CCW_LEN;
1260	ipb->pb0_hdr.pbt = IPL_PBT_CCW;
1261}
1262
1263static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1264{
1265	/* LOADPARM */
1266	/* check if read scp info worked and set loadparm */
1267	if (sclp_ipl_info.is_valid)
1268		memcpy(ipb->ccw.loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
1269	else
1270		/* read scp info failed: set empty loadparm (EBCDIC blanks) */
1271		memset(ipb->ccw.loadparm, 0x40, LOADPARM_LEN);
1272	ipb->ccw.flags = IPL_PB0_FLAG_LOADPARM;
1273
1274	/* VM PARM */
1275	if (MACHINE_IS_VM && ipl_block_valid &&
1276	    (ipl_block.ccw.vm_flags & IPL_PB0_CCW_VM_FLAG_VP)) {
1277
1278		ipb->ccw.vm_flags |= IPL_PB0_CCW_VM_FLAG_VP;
1279		ipb->ccw.vm_parm_len = ipl_block.ccw.vm_parm_len;
1280		memcpy(ipb->ccw.vm_parm,
1281		       ipl_block.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1282	}
1283}
1284
1285static int __init reipl_nss_init(void)
1286{
1287	int rc;
1288
1289	if (!MACHINE_IS_VM)
1290		return 0;
1291
1292	reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1293	if (!reipl_block_nss)
1294		return -ENOMEM;
1295
1296	rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1297	if (rc)
1298		return rc;
1299
1300	reipl_block_ccw_init(reipl_block_nss);
1301	reipl_capabilities |= IPL_TYPE_NSS;
1302	return 0;
1303}
1304
1305static int __init reipl_ccw_init(void)
1306{
1307	int rc;
1308
1309	reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1310	if (!reipl_block_ccw)
1311		return -ENOMEM;
1312
1313	rc = sysfs_create_group(&reipl_kset->kobj,
1314				MACHINE_IS_VM ? &reipl_ccw_attr_group_vm
1315					      : &reipl_ccw_attr_group_lpar);
1316	if (rc)
1317		return rc;
1318
1319	reipl_block_ccw_init(reipl_block_ccw);
1320	if (ipl_info.type == IPL_TYPE_CCW) {
1321		reipl_block_ccw->ccw.ssid = ipl_block.ccw.ssid;
1322		reipl_block_ccw->ccw.devno = ipl_block.ccw.devno;
1323		reipl_block_ccw_fill_parms(reipl_block_ccw);
1324	}
1325
1326	reipl_capabilities |= IPL_TYPE_CCW;
1327	return 0;
1328}
1329
1330static int __init reipl_fcp_init(void)
1331{
1332	int rc;
1333
1334	reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1335	if (!reipl_block_fcp)
1336		return -ENOMEM;
1337
1338	/* sysfs: create fcp kset for mixing attr group and bin attrs */
1339	reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1340					     &reipl_kset->kobj);
1341	if (!reipl_fcp_kset) {
1342		free_page((unsigned long) reipl_block_fcp);
1343		return -ENOMEM;
1344	}
1345
1346	rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1347	if (rc)
1348		goto out1;
1349
1350	if (test_facility(141)) {
1351		rc = sysfs_create_file(&reipl_fcp_kset->kobj,
1352				       &sys_reipl_fcp_clear_attr.attr);
1353		if (rc)
1354			goto out2;
1355	} else {
1356		reipl_fcp_clear = true;
1357	}
1358
1359	if (ipl_info.type == IPL_TYPE_FCP) {
1360		memcpy(reipl_block_fcp, &ipl_block, sizeof(ipl_block));
1361		/*
1362		 * Fix loadparm: There are systems where the (SCSI) LOADPARM
1363		 * is invalid in the SCSI IPL parameter block, so take it
1364		 * always from sclp_ipl_info.
1365		 */
1366		memcpy(reipl_block_fcp->fcp.loadparm, sclp_ipl_info.loadparm,
1367		       LOADPARM_LEN);
1368	} else {
1369		reipl_block_fcp->hdr.len = IPL_BP_FCP_LEN;
1370		reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1371		reipl_block_fcp->fcp.len = IPL_BP0_FCP_LEN;
1372		reipl_block_fcp->fcp.pbt = IPL_PBT_FCP;
1373		reipl_block_fcp->fcp.opt = IPL_PB0_FCP_OPT_IPL;
1374	}
1375	reipl_capabilities |= IPL_TYPE_FCP;
1376	return 0;
1377
1378out2:
1379	sysfs_remove_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1380out1:
1381	kset_unregister(reipl_fcp_kset);
1382	free_page((unsigned long) reipl_block_fcp);
1383	return rc;
1384}
1385
1386static int __init reipl_nvme_init(void)
1387{
1388	int rc;
1389
1390	reipl_block_nvme = (void *) get_zeroed_page(GFP_KERNEL);
1391	if (!reipl_block_nvme)
1392		return -ENOMEM;
1393
1394	/* sysfs: create kset for mixing attr group and bin attrs */
1395	reipl_nvme_kset = kset_create_and_add(IPL_NVME_STR, NULL,
1396					     &reipl_kset->kobj);
1397	if (!reipl_nvme_kset) {
1398		free_page((unsigned long) reipl_block_nvme);
1399		return -ENOMEM;
1400	}
1401
1402	rc = sysfs_create_group(&reipl_nvme_kset->kobj, &reipl_nvme_attr_group);
1403	if (rc)
1404		goto out1;
1405
1406	if (test_facility(141)) {
1407		rc = sysfs_create_file(&reipl_nvme_kset->kobj,
1408				       &sys_reipl_nvme_clear_attr.attr);
1409		if (rc)
1410			goto out2;
1411	} else {
1412		reipl_nvme_clear = true;
1413	}
1414
1415	if (ipl_info.type == IPL_TYPE_NVME) {
1416		memcpy(reipl_block_nvme, &ipl_block, sizeof(ipl_block));
1417		/*
1418		 * Fix loadparm: There are systems where the (SCSI) LOADPARM
1419		 * is invalid in the IPL parameter block, so take it
1420		 * always from sclp_ipl_info.
1421		 */
1422		memcpy(reipl_block_nvme->nvme.loadparm, sclp_ipl_info.loadparm,
1423		       LOADPARM_LEN);
1424	} else {
1425		reipl_block_nvme->hdr.len = IPL_BP_NVME_LEN;
1426		reipl_block_nvme->hdr.version = IPL_PARM_BLOCK_VERSION;
1427		reipl_block_nvme->nvme.len = IPL_BP0_NVME_LEN;
1428		reipl_block_nvme->nvme.pbt = IPL_PBT_NVME;
1429		reipl_block_nvme->nvme.opt = IPL_PB0_NVME_OPT_IPL;
1430	}
1431	reipl_capabilities |= IPL_TYPE_NVME;
1432	return 0;
1433
1434out2:
1435	sysfs_remove_group(&reipl_nvme_kset->kobj, &reipl_nvme_attr_group);
1436out1:
1437	kset_unregister(reipl_nvme_kset);
1438	free_page((unsigned long) reipl_block_nvme);
1439	return rc;
1440}
1441
1442static int __init reipl_eckd_init(void)
1443{
1444	int rc;
1445
1446	if (!sclp.has_sipl_eckd)
1447		return 0;
1448
1449	reipl_block_eckd = (void *)get_zeroed_page(GFP_KERNEL);
1450	if (!reipl_block_eckd)
1451		return -ENOMEM;
1452
1453	/* sysfs: create kset for mixing attr group and bin attrs */
1454	reipl_eckd_kset = kset_create_and_add(IPL_ECKD_STR, NULL,
1455					      &reipl_kset->kobj);
1456	if (!reipl_eckd_kset) {
1457		free_page((unsigned long)reipl_block_eckd);
1458		return -ENOMEM;
1459	}
1460
1461	rc = sysfs_create_group(&reipl_eckd_kset->kobj, &reipl_eckd_attr_group);
1462	if (rc)
1463		goto out1;
1464
1465	if (test_facility(141)) {
1466		rc = sysfs_create_file(&reipl_eckd_kset->kobj,
1467				       &sys_reipl_eckd_clear_attr.attr);
1468		if (rc)
1469			goto out2;
1470	} else {
1471		reipl_eckd_clear = true;
1472	}
1473
1474	if (ipl_info.type == IPL_TYPE_ECKD) {
1475		memcpy(reipl_block_eckd, &ipl_block, sizeof(ipl_block));
1476	} else {
1477		reipl_block_eckd->hdr.len = IPL_BP_ECKD_LEN;
1478		reipl_block_eckd->hdr.version = IPL_PARM_BLOCK_VERSION;
1479		reipl_block_eckd->eckd.len = IPL_BP0_ECKD_LEN;
1480		reipl_block_eckd->eckd.pbt = IPL_PBT_ECKD;
1481		reipl_block_eckd->eckd.opt = IPL_PB0_ECKD_OPT_IPL;
1482	}
1483	reipl_capabilities |= IPL_TYPE_ECKD;
1484	return 0;
1485
1486out2:
1487	sysfs_remove_group(&reipl_eckd_kset->kobj, &reipl_eckd_attr_group);
1488out1:
1489	kset_unregister(reipl_eckd_kset);
1490	free_page((unsigned long)reipl_block_eckd);
1491	return rc;
1492}
1493
1494static int __init reipl_type_init(void)
1495{
1496	enum ipl_type reipl_type = ipl_info.type;
1497	struct ipl_parameter_block *reipl_block;
1498	unsigned long size;
1499
1500	reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size);
1501	if (!reipl_block)
1502		goto out;
1503	/*
1504	 * If we have an OS info reipl block, this will be used
1505	 */
1506	if (reipl_block->pb0_hdr.pbt == IPL_PBT_FCP) {
1507		memcpy(reipl_block_fcp, reipl_block, size);
1508		reipl_type = IPL_TYPE_FCP;
1509	} else if (reipl_block->pb0_hdr.pbt == IPL_PBT_NVME) {
1510		memcpy(reipl_block_nvme, reipl_block, size);
1511		reipl_type = IPL_TYPE_NVME;
1512	} else if (reipl_block->pb0_hdr.pbt == IPL_PBT_CCW) {
1513		memcpy(reipl_block_ccw, reipl_block, size);
1514		reipl_type = IPL_TYPE_CCW;
1515	} else if (reipl_block->pb0_hdr.pbt == IPL_PBT_ECKD) {
1516		memcpy(reipl_block_eckd, reipl_block, size);
1517		reipl_type = IPL_TYPE_ECKD;
1518	}
1519out:
1520	return reipl_set_type(reipl_type);
1521}
1522
1523static int __init reipl_init(void)
1524{
1525	int rc;
1526
1527	reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1528	if (!reipl_kset)
1529		return -ENOMEM;
1530	rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1531	if (rc) {
1532		kset_unregister(reipl_kset);
1533		return rc;
1534	}
1535	rc = reipl_ccw_init();
1536	if (rc)
1537		return rc;
1538	rc = reipl_eckd_init();
1539	if (rc)
1540		return rc;
1541	rc = reipl_fcp_init();
1542	if (rc)
1543		return rc;
1544	rc = reipl_nvme_init();
1545	if (rc)
1546		return rc;
1547	rc = reipl_nss_init();
1548	if (rc)
1549		return rc;
1550	return reipl_type_init();
1551}
1552
1553static struct shutdown_action __refdata reipl_action = {
1554	.name	= SHUTDOWN_ACTION_REIPL_STR,
1555	.fn	= reipl_run,
1556	.init	= reipl_init,
1557};
1558
1559/*
1560 * dump shutdown action: Dump Linux on shutdown.
1561 */
1562
1563/* FCP dump device attributes */
1564
1565DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n",
1566		   dump_block_fcp->fcp.wwpn);
1567DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n",
1568		   dump_block_fcp->fcp.lun);
1569DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1570		   dump_block_fcp->fcp.bootprog);
1571DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1572		   dump_block_fcp->fcp.br_lba);
1573DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1574		   dump_block_fcp->fcp.devno);
1575
1576DEFINE_IPL_ATTR_SCP_DATA_RW(dump_fcp, dump_block_fcp->hdr,
1577			    dump_block_fcp->fcp,
1578			    IPL_BP_FCP_LEN, IPL_BP0_FCP_LEN,
1579			    DIAG308_SCPDATA_SIZE);
1580
1581static struct attribute *dump_fcp_attrs[] = {
1582	&sys_dump_fcp_device_attr.attr,
1583	&sys_dump_fcp_wwpn_attr.attr,
1584	&sys_dump_fcp_lun_attr.attr,
1585	&sys_dump_fcp_bootprog_attr.attr,
1586	&sys_dump_fcp_br_lba_attr.attr,
1587	NULL,
1588};
1589
1590static struct bin_attribute *dump_fcp_bin_attrs[] = {
1591	&sys_dump_fcp_scp_data_attr,
1592	NULL,
1593};
1594
1595static struct attribute_group dump_fcp_attr_group = {
1596	.name  = IPL_FCP_STR,
1597	.attrs = dump_fcp_attrs,
1598	.bin_attrs = dump_fcp_bin_attrs,
1599};
1600
1601/* NVME dump device attributes */
1602DEFINE_IPL_ATTR_RW(dump_nvme, fid, "0x%08llx\n", "%llx\n",
1603		   dump_block_nvme->nvme.fid);
1604DEFINE_IPL_ATTR_RW(dump_nvme, nsid, "0x%08llx\n", "%llx\n",
1605		   dump_block_nvme->nvme.nsid);
1606DEFINE_IPL_ATTR_RW(dump_nvme, bootprog, "%lld\n", "%llx\n",
1607		   dump_block_nvme->nvme.bootprog);
1608DEFINE_IPL_ATTR_RW(dump_nvme, br_lba, "%lld\n", "%llx\n",
1609		   dump_block_nvme->nvme.br_lba);
1610
1611DEFINE_IPL_ATTR_SCP_DATA_RW(dump_nvme, dump_block_nvme->hdr,
1612			    dump_block_nvme->nvme,
1613			    IPL_BP_NVME_LEN, IPL_BP0_NVME_LEN,
1614			    DIAG308_SCPDATA_SIZE);
1615
1616static struct attribute *dump_nvme_attrs[] = {
1617	&sys_dump_nvme_fid_attr.attr,
1618	&sys_dump_nvme_nsid_attr.attr,
1619	&sys_dump_nvme_bootprog_attr.attr,
1620	&sys_dump_nvme_br_lba_attr.attr,
1621	NULL,
1622};
1623
1624static struct bin_attribute *dump_nvme_bin_attrs[] = {
1625	&sys_dump_nvme_scp_data_attr,
1626	NULL,
1627};
1628
1629static struct attribute_group dump_nvme_attr_group = {
1630	.name  = IPL_NVME_STR,
1631	.attrs = dump_nvme_attrs,
1632	.bin_attrs = dump_nvme_bin_attrs,
1633};
1634
1635/* ECKD dump device attributes */
1636DEFINE_IPL_CCW_ATTR_RW(dump_eckd, device, dump_block_eckd->eckd);
1637DEFINE_IPL_ATTR_RW(dump_eckd, bootprog, "%lld\n", "%llx\n",
1638		   dump_block_eckd->eckd.bootprog);
1639
1640IPL_ATTR_BR_CHR_SHOW_FN(dump, dump_block_eckd->eckd);
1641IPL_ATTR_BR_CHR_STORE_FN(dump, dump_block_eckd->eckd);
1642
1643static struct kobj_attribute sys_dump_eckd_br_chr_attr =
1644	__ATTR(br_chr, 0644, eckd_dump_br_chr_show, eckd_dump_br_chr_store);
1645
1646DEFINE_IPL_ATTR_SCP_DATA_RW(dump_eckd, dump_block_eckd->hdr,
1647			    dump_block_eckd->eckd,
1648			    IPL_BP_ECKD_LEN, IPL_BP0_ECKD_LEN,
1649			    DIAG308_SCPDATA_SIZE);
1650
1651static struct attribute *dump_eckd_attrs[] = {
1652	&sys_dump_eckd_device_attr.attr,
1653	&sys_dump_eckd_bootprog_attr.attr,
1654	&sys_dump_eckd_br_chr_attr.attr,
1655	NULL,
1656};
1657
1658static struct bin_attribute *dump_eckd_bin_attrs[] = {
1659	&sys_dump_eckd_scp_data_attr,
1660	NULL,
1661};
1662
1663static struct attribute_group dump_eckd_attr_group = {
1664	.name  = IPL_ECKD_STR,
1665	.attrs = dump_eckd_attrs,
1666	.bin_attrs = dump_eckd_bin_attrs,
1667};
1668
1669/* CCW dump device attributes */
1670DEFINE_IPL_CCW_ATTR_RW(dump_ccw, device, dump_block_ccw->ccw);
1671
1672static struct attribute *dump_ccw_attrs[] = {
1673	&sys_dump_ccw_device_attr.attr,
1674	NULL,
1675};
1676
1677static struct attribute_group dump_ccw_attr_group = {
1678	.name  = IPL_CCW_STR,
1679	.attrs = dump_ccw_attrs,
1680};
1681
1682/* dump type */
1683
1684static int dump_set_type(enum dump_type type)
1685{
1686	if (!(dump_capabilities & type))
1687		return -EINVAL;
1688	dump_type = type;
1689	return 0;
1690}
1691
1692static ssize_t dump_type_show(struct kobject *kobj,
1693			      struct kobj_attribute *attr, char *page)
1694{
1695	return sysfs_emit(page, "%s\n", dump_type_str(dump_type));
1696}
1697
1698static ssize_t dump_type_store(struct kobject *kobj,
1699			       struct kobj_attribute *attr,
1700			       const char *buf, size_t len)
1701{
1702	int rc = -EINVAL;
1703
1704	if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1705		rc = dump_set_type(DUMP_TYPE_NONE);
1706	else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1707		rc = dump_set_type(DUMP_TYPE_CCW);
1708	else if (strncmp(buf, DUMP_ECKD_STR, strlen(DUMP_ECKD_STR)) == 0)
1709		rc = dump_set_type(DUMP_TYPE_ECKD);
1710	else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1711		rc = dump_set_type(DUMP_TYPE_FCP);
1712	else if (strncmp(buf, DUMP_NVME_STR, strlen(DUMP_NVME_STR)) == 0)
1713		rc = dump_set_type(DUMP_TYPE_NVME);
1714	return (rc != 0) ? rc : len;
1715}
1716
1717static struct kobj_attribute dump_type_attr =
1718	__ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1719
1720static ssize_t dump_area_size_show(struct kobject *kobj,
1721				   struct kobj_attribute *attr, char *page)
1722{
1723	return sysfs_emit(page, "%lu\n", sclp.hsa_size);
1724}
1725
1726static struct kobj_attribute dump_area_size_attr = __ATTR_RO(dump_area_size);
1727
1728static struct attribute *dump_attrs[] = {
1729	&dump_type_attr.attr,
1730	&dump_area_size_attr.attr,
1731	NULL,
1732};
1733
1734static struct attribute_group dump_attr_group = {
1735	.attrs = dump_attrs,
1736};
1737
1738static struct kset *dump_kset;
1739
1740static void diag308_dump(void *dump_block)
1741{
1742	diag308(DIAG308_SET, dump_block);
1743	while (1) {
1744		if (diag308(DIAG308_LOAD_NORMAL_DUMP, NULL) != 0x302)
1745			break;
1746		udelay(USEC_PER_SEC);
1747	}
1748}
1749
1750static void __dump_run(void *unused)
1751{
1752	switch (dump_type) {
1753	case DUMP_TYPE_CCW:
1754		diag308_dump(dump_block_ccw);
1755		break;
1756	case DUMP_TYPE_ECKD:
1757		diag308_dump(dump_block_eckd);
1758		break;
1759	case DUMP_TYPE_FCP:
1760		diag308_dump(dump_block_fcp);
1761		break;
1762	case DUMP_TYPE_NVME:
1763		diag308_dump(dump_block_nvme);
1764		break;
1765	default:
1766		break;
1767	}
1768}
1769
1770static void dump_run(struct shutdown_trigger *trigger)
1771{
1772	if (dump_type == DUMP_TYPE_NONE)
1773		return;
1774	smp_send_stop();
1775	smp_call_ipl_cpu(__dump_run, NULL);
1776}
1777
1778static int __init dump_ccw_init(void)
1779{
1780	int rc;
1781
1782	dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1783	if (!dump_block_ccw)
1784		return -ENOMEM;
1785	rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1786	if (rc) {
1787		free_page((unsigned long)dump_block_ccw);
1788		return rc;
1789	}
1790	dump_block_ccw->hdr.len = IPL_BP_CCW_LEN;
1791	dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1792	dump_block_ccw->ccw.len = IPL_BP0_CCW_LEN;
1793	dump_block_ccw->ccw.pbt = IPL_PBT_CCW;
1794	dump_capabilities |= DUMP_TYPE_CCW;
1795	return 0;
1796}
1797
1798static int __init dump_fcp_init(void)
1799{
1800	int rc;
1801
1802	if (!sclp_ipl_info.has_dump)
1803		return 0; /* LDIPL DUMP is not installed */
1804	dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1805	if (!dump_block_fcp)
1806		return -ENOMEM;
1807	rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1808	if (rc) {
1809		free_page((unsigned long)dump_block_fcp);
1810		return rc;
1811	}
1812	dump_block_fcp->hdr.len = IPL_BP_FCP_LEN;
1813	dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1814	dump_block_fcp->fcp.len = IPL_BP0_FCP_LEN;
1815	dump_block_fcp->fcp.pbt = IPL_PBT_FCP;
1816	dump_block_fcp->fcp.opt = IPL_PB0_FCP_OPT_DUMP;
1817	dump_capabilities |= DUMP_TYPE_FCP;
1818	return 0;
1819}
1820
1821static int __init dump_nvme_init(void)
1822{
1823	int rc;
1824
1825	if (!sclp_ipl_info.has_dump)
1826		return 0; /* LDIPL DUMP is not installed */
1827	dump_block_nvme = (void *) get_zeroed_page(GFP_KERNEL);
1828	if (!dump_block_nvme)
1829		return -ENOMEM;
1830	rc = sysfs_create_group(&dump_kset->kobj, &dump_nvme_attr_group);
1831	if (rc) {
1832		free_page((unsigned long)dump_block_nvme);
1833		return rc;
1834	}
1835	dump_block_nvme->hdr.len = IPL_BP_NVME_LEN;
1836	dump_block_nvme->hdr.version = IPL_PARM_BLOCK_VERSION;
1837	dump_block_nvme->nvme.len = IPL_BP0_NVME_LEN;
1838	dump_block_nvme->nvme.pbt = IPL_PBT_NVME;
1839	dump_block_nvme->nvme.opt = IPL_PB0_NVME_OPT_DUMP;
1840	dump_capabilities |= DUMP_TYPE_NVME;
1841	return 0;
1842}
1843
1844static int __init dump_eckd_init(void)
1845{
1846	int rc;
1847
1848	if (!sclp_ipl_info.has_dump || !sclp.has_sipl_eckd)
1849		return 0; /* LDIPL DUMP is not installed */
1850	dump_block_eckd = (void *)get_zeroed_page(GFP_KERNEL);
1851	if (!dump_block_eckd)
1852		return -ENOMEM;
1853	rc = sysfs_create_group(&dump_kset->kobj, &dump_eckd_attr_group);
1854	if (rc) {
1855		free_page((unsigned long)dump_block_eckd);
1856		return rc;
1857	}
1858	dump_block_eckd->hdr.len = IPL_BP_ECKD_LEN;
1859	dump_block_eckd->hdr.version = IPL_PARM_BLOCK_VERSION;
1860	dump_block_eckd->eckd.len = IPL_BP0_ECKD_LEN;
1861	dump_block_eckd->eckd.pbt = IPL_PBT_ECKD;
1862	dump_block_eckd->eckd.opt = IPL_PB0_ECKD_OPT_DUMP;
1863	dump_capabilities |= DUMP_TYPE_ECKD;
1864	return 0;
1865}
1866
1867static int __init dump_init(void)
1868{
1869	int rc;
1870
1871	dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1872	if (!dump_kset)
1873		return -ENOMEM;
1874	rc = sysfs_create_group(&dump_kset->kobj, &dump_attr_group);
1875	if (rc) {
1876		kset_unregister(dump_kset);
1877		return rc;
1878	}
1879	rc = dump_ccw_init();
1880	if (rc)
1881		return rc;
1882	rc = dump_eckd_init();
1883	if (rc)
1884		return rc;
1885	rc = dump_fcp_init();
1886	if (rc)
1887		return rc;
1888	rc = dump_nvme_init();
1889	if (rc)
1890		return rc;
1891	dump_set_type(DUMP_TYPE_NONE);
1892	return 0;
1893}
1894
1895static struct shutdown_action __refdata dump_action = {
1896	.name	= SHUTDOWN_ACTION_DUMP_STR,
1897	.fn	= dump_run,
1898	.init	= dump_init,
1899};
1900
1901static void dump_reipl_run(struct shutdown_trigger *trigger)
1902{
1903	struct lowcore *abs_lc;
1904	unsigned int csum;
1905
1906	/*
1907	 * Set REIPL_CLEAR flag in os_info flags entry indicating
1908	 * 'clear' sysfs attribute has been set on the panicked system
1909	 * for specified reipl type.
1910	 * Always set for IPL_TYPE_NSS and IPL_TYPE_UNKNOWN.
1911	 */
1912	if ((reipl_type == IPL_TYPE_CCW && reipl_ccw_clear) ||
1913	    (reipl_type == IPL_TYPE_ECKD && reipl_eckd_clear) ||
1914	    (reipl_type == IPL_TYPE_FCP && reipl_fcp_clear) ||
1915	    (reipl_type == IPL_TYPE_NVME && reipl_nvme_clear) ||
1916	    reipl_type == IPL_TYPE_NSS ||
1917	    reipl_type == IPL_TYPE_UNKNOWN)
1918		os_info_flags |= OS_INFO_FLAG_REIPL_CLEAR;
1919	os_info_entry_add_data(OS_INFO_FLAGS_ENTRY, &os_info_flags, sizeof(os_info_flags));
1920	csum = (__force unsigned int)cksm(reipl_block_actual, reipl_block_actual->hdr.len, 0);
1921	abs_lc = get_abs_lowcore();
1922	abs_lc->ipib = __pa(reipl_block_actual);
1923	abs_lc->ipib_checksum = csum;
1924	put_abs_lowcore(abs_lc);
1925	dump_run(trigger);
1926}
1927
1928static struct shutdown_action __refdata dump_reipl_action = {
1929	.name	= SHUTDOWN_ACTION_DUMP_REIPL_STR,
1930	.fn	= dump_reipl_run,
1931};
1932
1933/*
1934 * vmcmd shutdown action: Trigger vm command on shutdown.
1935 */
1936
1937#define VMCMD_MAX_SIZE	240
1938
1939static char vmcmd_on_reboot[VMCMD_MAX_SIZE + 1];
1940static char vmcmd_on_panic[VMCMD_MAX_SIZE + 1];
1941static char vmcmd_on_halt[VMCMD_MAX_SIZE + 1];
1942static char vmcmd_on_poff[VMCMD_MAX_SIZE + 1];
1943static char vmcmd_on_restart[VMCMD_MAX_SIZE + 1];
1944
1945DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1946DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1947DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1948DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1949DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1950
1951static struct attribute *vmcmd_attrs[] = {
1952	&sys_vmcmd_on_reboot_attr.attr,
1953	&sys_vmcmd_on_panic_attr.attr,
1954	&sys_vmcmd_on_halt_attr.attr,
1955	&sys_vmcmd_on_poff_attr.attr,
1956	&sys_vmcmd_on_restart_attr.attr,
1957	NULL,
1958};
1959
1960static struct attribute_group vmcmd_attr_group = {
1961	.attrs = vmcmd_attrs,
1962};
1963
1964static struct kset *vmcmd_kset;
1965
1966static void vmcmd_run(struct shutdown_trigger *trigger)
1967{
1968	char *cmd;
1969
1970	if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1971		cmd = vmcmd_on_reboot;
1972	else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1973		cmd = vmcmd_on_panic;
1974	else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1975		cmd = vmcmd_on_halt;
1976	else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1977		cmd = vmcmd_on_poff;
1978	else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
1979		cmd = vmcmd_on_restart;
1980	else
1981		return;
1982
1983	if (strlen(cmd) == 0)
1984		return;
1985	__cpcmd(cmd, NULL, 0, NULL);
1986}
1987
1988static int vmcmd_init(void)
1989{
1990	if (!MACHINE_IS_VM)
1991		return -EOPNOTSUPP;
1992	vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1993	if (!vmcmd_kset)
1994		return -ENOMEM;
1995	return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1996}
1997
1998static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1999					      vmcmd_run, vmcmd_init};
2000
2001/*
2002 * stop shutdown action: Stop Linux on shutdown.
2003 */
2004
2005static void stop_run(struct shutdown_trigger *trigger)
2006{
2007	if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
2008	    strcmp(trigger->name, ON_RESTART_STR) == 0)
2009		disabled_wait();
2010	smp_stop_cpu();
2011}
2012
2013static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
2014					     stop_run, NULL};
2015
2016/* action list */
2017
2018static struct shutdown_action *shutdown_actions_list[] = {
2019	&ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
2020	&vmcmd_action, &stop_action};
2021#define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
2022
2023/*
2024 * Trigger section
2025 */
2026
2027static struct kset *shutdown_actions_kset;
2028
2029static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
2030		       size_t len)
2031{
2032	int i;
2033
2034	for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
2035		if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
2036			if (shutdown_actions_list[i]->init_rc) {
2037				return shutdown_actions_list[i]->init_rc;
2038			} else {
2039				trigger->action = shutdown_actions_list[i];
2040				return len;
2041			}
2042		}
2043	}
2044	return -EINVAL;
2045}
2046
2047/* on reipl */
2048
2049static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
2050						    &reipl_action};
2051
2052static ssize_t on_reboot_show(struct kobject *kobj,
2053			      struct kobj_attribute *attr, char *page)
2054{
2055	return sysfs_emit(page, "%s\n", on_reboot_trigger.action->name);
2056}
2057
2058static ssize_t on_reboot_store(struct kobject *kobj,
2059			       struct kobj_attribute *attr,
2060			       const char *buf, size_t len)
2061{
2062	return set_trigger(buf, &on_reboot_trigger, len);
2063}
2064static struct kobj_attribute on_reboot_attr = __ATTR_RW(on_reboot);
2065
2066static void do_machine_restart(char *__unused)
2067{
2068	smp_send_stop();
2069	on_reboot_trigger.action->fn(&on_reboot_trigger);
2070	reipl_run(NULL);
2071}
2072void (*_machine_restart)(char *command) = do_machine_restart;
2073
2074/* on panic */
2075
2076static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
2077
2078static ssize_t on_panic_show(struct kobject *kobj,
2079			     struct kobj_attribute *attr, char *page)
2080{
2081	return sysfs_emit(page, "%s\n", on_panic_trigger.action->name);
2082}
2083
2084static ssize_t on_panic_store(struct kobject *kobj,
2085			      struct kobj_attribute *attr,
2086			      const char *buf, size_t len)
2087{
2088	return set_trigger(buf, &on_panic_trigger, len);
2089}
2090static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic);
2091
2092static void do_panic(void)
2093{
2094	lgr_info_log();
2095	on_panic_trigger.action->fn(&on_panic_trigger);
2096	stop_run(&on_panic_trigger);
2097}
2098
2099/* on restart */
2100
2101static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
2102	&stop_action};
2103
2104static ssize_t on_restart_show(struct kobject *kobj,
2105			       struct kobj_attribute *attr, char *page)
2106{
2107	return sysfs_emit(page, "%s\n", on_restart_trigger.action->name);
2108}
2109
2110static ssize_t on_restart_store(struct kobject *kobj,
2111				struct kobj_attribute *attr,
2112				const char *buf, size_t len)
2113{
2114	return set_trigger(buf, &on_restart_trigger, len);
2115}
2116static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart);
2117
2118static void __do_restart(void *ignore)
2119{
2120	smp_send_stop();
2121#ifdef CONFIG_CRASH_DUMP
2122	crash_kexec(NULL);
2123#endif
2124	on_restart_trigger.action->fn(&on_restart_trigger);
2125	stop_run(&on_restart_trigger);
2126}
2127
2128void do_restart(void *arg)
2129{
2130	tracing_off();
2131	debug_locks_off();
2132	lgr_info_log();
2133	smp_call_ipl_cpu(__do_restart, arg);
2134}
2135
2136/* on halt */
2137
2138static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
2139
2140static ssize_t on_halt_show(struct kobject *kobj,
2141			    struct kobj_attribute *attr, char *page)
2142{
2143	return sysfs_emit(page, "%s\n", on_halt_trigger.action->name);
2144}
2145
2146static ssize_t on_halt_store(struct kobject *kobj,
2147			     struct kobj_attribute *attr,
2148			     const char *buf, size_t len)
2149{
2150	return set_trigger(buf, &on_halt_trigger, len);
2151}
2152static struct kobj_attribute on_halt_attr = __ATTR_RW(on_halt);
2153
2154static void do_machine_halt(void)
2155{
2156	smp_send_stop();
2157	on_halt_trigger.action->fn(&on_halt_trigger);
2158	stop_run(&on_halt_trigger);
2159}
2160void (*_machine_halt)(void) = do_machine_halt;
2161
2162/* on power off */
2163
2164static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
2165
2166static ssize_t on_poff_show(struct kobject *kobj,
2167			    struct kobj_attribute *attr, char *page)
2168{
2169	return sysfs_emit(page, "%s\n", on_poff_trigger.action->name);
2170}
2171
2172static ssize_t on_poff_store(struct kobject *kobj,
2173			     struct kobj_attribute *attr,
2174			     const char *buf, size_t len)
2175{
2176	return set_trigger(buf, &on_poff_trigger, len);
2177}
2178static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff);
2179
2180static void do_machine_power_off(void)
2181{
2182	smp_send_stop();
2183	on_poff_trigger.action->fn(&on_poff_trigger);
2184	stop_run(&on_poff_trigger);
2185}
2186void (*_machine_power_off)(void) = do_machine_power_off;
2187
2188static struct attribute *shutdown_action_attrs[] = {
2189	&on_restart_attr.attr,
2190	&on_reboot_attr.attr,
2191	&on_panic_attr.attr,
2192	&on_halt_attr.attr,
2193	&on_poff_attr.attr,
2194	NULL,
2195};
2196
2197static struct attribute_group shutdown_action_attr_group = {
2198	.attrs = shutdown_action_attrs,
2199};
2200
2201static void __init shutdown_triggers_init(void)
2202{
2203	shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
2204						    firmware_kobj);
2205	if (!shutdown_actions_kset)
2206		goto fail;
2207	if (sysfs_create_group(&shutdown_actions_kset->kobj,
2208			       &shutdown_action_attr_group))
2209		goto fail;
2210	return;
2211fail:
2212	panic("shutdown_triggers_init failed\n");
2213}
2214
2215static void __init shutdown_actions_init(void)
2216{
2217	int i;
2218
2219	for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
2220		if (!shutdown_actions_list[i]->init)
2221			continue;
2222		shutdown_actions_list[i]->init_rc =
2223			shutdown_actions_list[i]->init();
2224	}
2225}
2226
2227static int __init s390_ipl_init(void)
2228{
2229	char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40};
2230
2231	sclp_early_get_ipl_info(&sclp_ipl_info);
2232	/*
2233	 * Fix loadparm: There are systems where the (SCSI) LOADPARM
2234	 * returned by read SCP info is invalid (contains EBCDIC blanks)
2235	 * when the system has been booted via diag308. In that case we use
2236	 * the value from diag308, if available.
2237	 *
2238	 * There are also systems where diag308 store does not work in
2239	 * case the system is booted from HMC. Fortunately in this case
2240	 * READ SCP info provides the correct value.
2241	 */
2242	if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 && ipl_block_valid)
2243		memcpy(sclp_ipl_info.loadparm, ipl_block.ccw.loadparm, LOADPARM_LEN);
2244	shutdown_actions_init();
2245	shutdown_triggers_init();
2246	return 0;
2247}
2248
2249__initcall(s390_ipl_init);
2250
2251static void __init strncpy_skip_quote(char *dst, char *src, int n)
2252{
2253	int sx, dx;
2254
2255	dx = 0;
2256	for (sx = 0; src[sx] != 0; sx++) {
2257		if (src[sx] == '"')
2258			continue;
2259		dst[dx++] = src[sx];
2260		if (dx >= n)
2261			break;
2262	}
2263}
2264
2265static int __init vmcmd_on_reboot_setup(char *str)
2266{
2267	if (!MACHINE_IS_VM)
2268		return 1;
2269	strncpy_skip_quote(vmcmd_on_reboot, str, VMCMD_MAX_SIZE);
2270	vmcmd_on_reboot[VMCMD_MAX_SIZE] = 0;
2271	on_reboot_trigger.action = &vmcmd_action;
2272	return 1;
2273}
2274__setup("vmreboot=", vmcmd_on_reboot_setup);
2275
2276static int __init vmcmd_on_panic_setup(char *str)
2277{
2278	if (!MACHINE_IS_VM)
2279		return 1;
2280	strncpy_skip_quote(vmcmd_on_panic, str, VMCMD_MAX_SIZE);
2281	vmcmd_on_panic[VMCMD_MAX_SIZE] = 0;
2282	on_panic_trigger.action = &vmcmd_action;
2283	return 1;
2284}
2285__setup("vmpanic=", vmcmd_on_panic_setup);
2286
2287static int __init vmcmd_on_halt_setup(char *str)
2288{
2289	if (!MACHINE_IS_VM)
2290		return 1;
2291	strncpy_skip_quote(vmcmd_on_halt, str, VMCMD_MAX_SIZE);
2292	vmcmd_on_halt[VMCMD_MAX_SIZE] = 0;
2293	on_halt_trigger.action = &vmcmd_action;
2294	return 1;
2295}
2296__setup("vmhalt=", vmcmd_on_halt_setup);
2297
2298static int __init vmcmd_on_poff_setup(char *str)
2299{
2300	if (!MACHINE_IS_VM)
2301		return 1;
2302	strncpy_skip_quote(vmcmd_on_poff, str, VMCMD_MAX_SIZE);
2303	vmcmd_on_poff[VMCMD_MAX_SIZE] = 0;
2304	on_poff_trigger.action = &vmcmd_action;
2305	return 1;
2306}
2307__setup("vmpoff=", vmcmd_on_poff_setup);
2308
2309static int on_panic_notify(struct notifier_block *self,
2310			   unsigned long event, void *data)
2311{
2312	do_panic();
2313	return NOTIFY_OK;
2314}
2315
2316static struct notifier_block on_panic_nb = {
2317	.notifier_call = on_panic_notify,
2318	.priority = INT_MIN,
2319};
2320
2321void __init setup_ipl(void)
2322{
2323	BUILD_BUG_ON(sizeof(struct ipl_parameter_block) != PAGE_SIZE);
2324
2325	ipl_info.type = get_ipl_type();
2326	switch (ipl_info.type) {
2327	case IPL_TYPE_CCW:
2328		ipl_info.data.ccw.dev_id.ssid = ipl_block.ccw.ssid;
2329		ipl_info.data.ccw.dev_id.devno = ipl_block.ccw.devno;
2330		break;
2331	case IPL_TYPE_ECKD:
2332	case IPL_TYPE_ECKD_DUMP:
2333		ipl_info.data.eckd.dev_id.ssid = ipl_block.eckd.ssid;
2334		ipl_info.data.eckd.dev_id.devno = ipl_block.eckd.devno;
2335		break;
2336	case IPL_TYPE_FCP:
2337	case IPL_TYPE_FCP_DUMP:
2338		ipl_info.data.fcp.dev_id.ssid = 0;
2339		ipl_info.data.fcp.dev_id.devno = ipl_block.fcp.devno;
2340		ipl_info.data.fcp.wwpn = ipl_block.fcp.wwpn;
2341		ipl_info.data.fcp.lun = ipl_block.fcp.lun;
2342		break;
2343	case IPL_TYPE_NVME:
2344	case IPL_TYPE_NVME_DUMP:
2345		ipl_info.data.nvme.fid = ipl_block.nvme.fid;
2346		ipl_info.data.nvme.nsid = ipl_block.nvme.nsid;
2347		break;
2348	case IPL_TYPE_NSS:
2349	case IPL_TYPE_UNKNOWN:
2350		/* We have no info to copy */
2351		break;
2352	}
2353	atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
2354}
2355
2356void s390_reset_system(void)
2357{
2358	/* Disable prefixing */
2359	set_prefix(0);
2360
2361	/* Disable lowcore protection */
2362	local_ctl_clear_bit(0, CR0_LOW_ADDRESS_PROTECTION_BIT);
2363	diag_amode31_ops.diag308_reset();
2364}
2365
2366#ifdef CONFIG_KEXEC_FILE
2367
2368int ipl_report_add_component(struct ipl_report *report, struct kexec_buf *kbuf,
2369			     unsigned char flags, unsigned short cert)
2370{
2371	struct ipl_report_component *comp;
2372
2373	comp = vzalloc(sizeof(*comp));
2374	if (!comp)
2375		return -ENOMEM;
2376	list_add_tail(&comp->list, &report->components);
2377
2378	comp->entry.addr = kbuf->mem;
2379	comp->entry.len = kbuf->memsz;
2380	comp->entry.flags = flags;
2381	comp->entry.certificate_index = cert;
2382
2383	report->size += sizeof(comp->entry);
2384
2385	return 0;
2386}
2387
2388int ipl_report_add_certificate(struct ipl_report *report, void *key,
2389			       unsigned long addr, unsigned long len)
2390{
2391	struct ipl_report_certificate *cert;
2392
2393	cert = vzalloc(sizeof(*cert));
2394	if (!cert)
2395		return -ENOMEM;
2396	list_add_tail(&cert->list, &report->certificates);
2397
2398	cert->entry.addr = addr;
2399	cert->entry.len = len;
2400	cert->key = key;
2401
2402	report->size += sizeof(cert->entry);
2403	report->size += cert->entry.len;
2404
2405	return 0;
2406}
2407
2408struct ipl_report *ipl_report_init(struct ipl_parameter_block *ipib)
2409{
2410	struct ipl_report *report;
2411
2412	report = vzalloc(sizeof(*report));
2413	if (!report)
2414		return ERR_PTR(-ENOMEM);
2415
2416	report->ipib = ipib;
2417	INIT_LIST_HEAD(&report->components);
2418	INIT_LIST_HEAD(&report->certificates);
2419
2420	report->size = ALIGN(ipib->hdr.len, 8);
2421	report->size += sizeof(struct ipl_rl_hdr);
2422	report->size += sizeof(struct ipl_rb_components);
2423	report->size += sizeof(struct ipl_rb_certificates);
2424
2425	return report;
2426}
2427
2428void *ipl_report_finish(struct ipl_report *report)
2429{
2430	struct ipl_report_certificate *cert;
2431	struct ipl_report_component *comp;
2432	struct ipl_rb_certificates *certs;
2433	struct ipl_parameter_block *ipib;
2434	struct ipl_rb_components *comps;
2435	struct ipl_rl_hdr *rl_hdr;
2436	void *buf, *ptr;
2437
2438	buf = vzalloc(report->size);
2439	if (!buf)
2440		goto out;
2441	ptr = buf;
2442
2443	memcpy(ptr, report->ipib, report->ipib->hdr.len);
2444	ipib = ptr;
2445	if (ipl_secure_flag)
2446		ipib->hdr.flags |= IPL_PL_FLAG_SIPL;
2447	ipib->hdr.flags |= IPL_PL_FLAG_IPLSR;
2448	ptr += report->ipib->hdr.len;
2449	ptr = PTR_ALIGN(ptr, 8);
2450
2451	rl_hdr = ptr;
2452	ptr += sizeof(*rl_hdr);
2453
2454	comps = ptr;
2455	comps->rbt = IPL_RBT_COMPONENTS;
2456	ptr += sizeof(*comps);
2457	list_for_each_entry(comp, &report->components, list) {
2458		memcpy(ptr, &comp->entry, sizeof(comp->entry));
2459		ptr += sizeof(comp->entry);
2460	}
2461	comps->len = ptr - (void *)comps;
2462
2463	certs = ptr;
2464	certs->rbt = IPL_RBT_CERTIFICATES;
2465	ptr += sizeof(*certs);
2466	list_for_each_entry(cert, &report->certificates, list) {
2467		memcpy(ptr, &cert->entry, sizeof(cert->entry));
2468		ptr += sizeof(cert->entry);
2469	}
2470	certs->len = ptr - (void *)certs;
2471	rl_hdr->len = ptr - (void *)rl_hdr;
2472
2473	list_for_each_entry(cert, &report->certificates, list) {
2474		memcpy(ptr, cert->key, cert->entry.len);
2475		ptr += cert->entry.len;
2476	}
2477
2478	BUG_ON(ptr > buf + report->size);
2479out:
2480	return buf;
2481}
2482
2483int ipl_report_free(struct ipl_report *report)
2484{
2485	struct ipl_report_component *comp, *ncomp;
2486	struct ipl_report_certificate *cert, *ncert;
2487
2488	list_for_each_entry_safe(comp, ncomp, &report->components, list)
2489		vfree(comp);
2490
2491	list_for_each_entry_safe(cert, ncert, &report->certificates, list)
2492		vfree(cert);
2493
2494	vfree(report);
2495
2496	return 0;
2497}
2498
2499#endif