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 unsigned long os_info_flags;
 180
 181static inline int __diag308(unsigned long subcode, unsigned long addr)
 182{
 183	union register_pair r1;
 
 184
 185	r1.even = addr;
 186	r1.odd	= 0;
 187	asm volatile(
 188		"	diag	%[r1],%[subcode],0x308\n"
 189		"0:	nopr	%%r7\n"
 190		EX_TABLE(0b,0b)
 191		: [r1] "+&d" (r1.pair)
 192		: [subcode] "d" (subcode)
 193		: "cc", "memory");
 194	return r1.odd;
 195}
 196
 197int diag308(unsigned long subcode, void *addr)
 198{
 199	diag_stat_inc(DIAG_STAT_X308);
 200	return __diag308(subcode, addr ? virt_to_phys(addr) : 0);
 201}
 202EXPORT_SYMBOL_GPL(diag308);
 203
 204/* SYSFS */
 205
 206#define IPL_ATTR_SHOW_FN(_prefix, _name, _format, args...)		\
 207static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,	\
 208		struct kobj_attribute *attr,				\
 209		char *page)						\
 210{									\
 211	return scnprintf(page, PAGE_SIZE, _format, ##args);		\
 212}
 213
 214#define IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk)			\
 215static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,	\
 216		struct kobj_attribute *attr,				\
 217		const char *buf, size_t len)				\
 218{									\
 219	unsigned long long ssid, devno;					\
 220									\
 221	if (sscanf(buf, "0.%llx.%llx\n", &ssid, &devno) != 2)		\
 222		return -EINVAL;						\
 223									\
 224	if (ssid > __MAX_SSID || devno > __MAX_SUBCHANNEL)		\
 225		return -EINVAL;						\
 226									\
 227	_ipl_blk.ssid = ssid;						\
 228	_ipl_blk.devno = devno;						\
 229	return len;							\
 230}
 231
 232#define DEFINE_IPL_CCW_ATTR_RW(_prefix, _name, _ipl_blk)		\
 233IPL_ATTR_SHOW_FN(_prefix, _name, "0.%x.%04x\n",				\
 234		 _ipl_blk.ssid, _ipl_blk.devno);			\
 235IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk);			\
 236static struct kobj_attribute sys_##_prefix##_##_name##_attr =		\
 237	__ATTR(_name, 0644,						\
 238	       sys_##_prefix##_##_name##_show,				\
 239	       sys_##_prefix##_##_name##_store)				\
 240
 241#define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value)		\
 242IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value)			\
 243static struct kobj_attribute sys_##_prefix##_##_name##_attr =		\
 244	__ATTR(_name, 0444, sys_##_prefix##_##_name##_show, NULL)
 245
 246#define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)	\
 247IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value)	\
 
 
 
 
 
 
 248static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,	\
 249		struct kobj_attribute *attr,				\
 250		const char *buf, size_t len)				\
 251{									\
 252	unsigned long long value;					\
 253	if (sscanf(buf, _fmt_in, &value) != 1)				\
 254		return -EINVAL;						\
 255	_value = value;							\
 256	return len;							\
 257}									\
 258static struct kobj_attribute sys_##_prefix##_##_name##_attr =		\
 259	__ATTR(_name, 0644,						\
 260			sys_##_prefix##_##_name##_show,			\
 261			sys_##_prefix##_##_name##_store)
 262
 263#define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
 264IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, _value)			\
 
 
 
 
 
 265static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,	\
 266		struct kobj_attribute *attr,				\
 267		const char *buf, size_t len)				\
 268{									\
 269	strscpy(_value, buf, sizeof(_value));				\
 270	strim(_value);							\
 271	return len;							\
 272}									\
 273static struct kobj_attribute sys_##_prefix##_##_name##_attr =		\
 274	__ATTR(_name, 0644,						\
 275			sys_##_prefix##_##_name##_show,			\
 276			sys_##_prefix##_##_name##_store)
 
 
 
 
 
 
 
 
 277
 278/*
 279 * ipl section
 280 */
 281
 282static __init enum ipl_type get_ipl_type(void)
 283{
 284	if (!ipl_block_valid)
 285		return IPL_TYPE_UNKNOWN;
 286
 287	switch (ipl_block.pb0_hdr.pbt) {
 288	case IPL_PBT_CCW:
 
 
 
 289		return IPL_TYPE_CCW;
 290	case IPL_PBT_FCP:
 291		if (ipl_block.fcp.opt == IPL_PB0_FCP_OPT_DUMP)
 292			return IPL_TYPE_FCP_DUMP;
 293		else
 294			return IPL_TYPE_FCP;
 295	case IPL_PBT_NVME:
 296		if (ipl_block.nvme.opt == IPL_PB0_NVME_OPT_DUMP)
 297			return IPL_TYPE_NVME_DUMP;
 298		else
 299			return IPL_TYPE_NVME;
 300	case IPL_PBT_ECKD:
 301		if (ipl_block.eckd.opt == IPL_PB0_ECKD_OPT_DUMP)
 302			return IPL_TYPE_ECKD_DUMP;
 303		else
 304			return IPL_TYPE_ECKD;
 305	}
 306	return IPL_TYPE_UNKNOWN;
 307}
 308
 309struct ipl_info ipl_info;
 310EXPORT_SYMBOL_GPL(ipl_info);
 311
 312static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
 313			     char *page)
 314{
 315	return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
 316}
 317
 318static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
 319
 320static ssize_t ipl_secure_show(struct kobject *kobj,
 321			       struct kobj_attribute *attr, char *page)
 
 322{
 323	return sprintf(page, "%i\n", !!ipl_secure_flag);
 324}
 
 325
 326static struct kobj_attribute sys_ipl_secure_attr =
 327	__ATTR(secure, 0444, ipl_secure_show, NULL);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 328
 329static ssize_t ipl_has_secure_show(struct kobject *kobj,
 330				   struct kobj_attribute *attr, char *page)
 331{
 332	return sprintf(page, "%i\n", !!sclp.has_sipl);
 333}
 334
 335static struct kobj_attribute sys_ipl_has_secure_attr =
 336	__ATTR(has_secure, 0444, ipl_has_secure_show, NULL);
 
 
 
 
 
 
 
 
 
 337
 338static ssize_t ipl_vm_parm_show(struct kobject *kobj,
 339				struct kobj_attribute *attr, char *page)
 340{
 341	char parm[DIAG308_VMPARM_SIZE + 1] = {};
 342
 343	if (ipl_block_valid && (ipl_block.pb0_hdr.pbt == IPL_PBT_CCW))
 344		ipl_block_get_ascii_vmparm(parm, sizeof(parm), &ipl_block);
 345	return sprintf(page, "%s\n", parm);
 346}
 347
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 348static struct kobj_attribute sys_ipl_vm_parm_attr =
 349	__ATTR(parm, 0444, ipl_vm_parm_show, NULL);
 350
 351static ssize_t sys_ipl_device_show(struct kobject *kobj,
 352				   struct kobj_attribute *attr, char *page)
 353{
 
 
 354	switch (ipl_info.type) {
 355	case IPL_TYPE_CCW:
 356		return sprintf(page, "0.%x.%04x\n", ipl_block.ccw.ssid,
 357			       ipl_block.ccw.devno);
 358	case IPL_TYPE_ECKD:
 359	case IPL_TYPE_ECKD_DUMP:
 360		return sprintf(page, "0.%x.%04x\n", ipl_block.eckd.ssid,
 361			       ipl_block.eckd.devno);
 362	case IPL_TYPE_FCP:
 363	case IPL_TYPE_FCP_DUMP:
 364		return sprintf(page, "0.0.%04x\n", ipl_block.fcp.devno);
 365	case IPL_TYPE_NVME:
 366	case IPL_TYPE_NVME_DUMP:
 367		return sprintf(page, "%08ux\n", ipl_block.nvme.fid);
 368	default:
 369		return 0;
 370	}
 371}
 372
 373static struct kobj_attribute sys_ipl_device_attr =
 374	__ATTR(device, 0444, sys_ipl_device_show, NULL);
 375
 376static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
 377				  struct bin_attribute *attr, char *buf,
 378				  loff_t off, size_t count)
 379{
 380	return memory_read_from_buffer(buf, count, &off, &ipl_block,
 381				       ipl_block.hdr.len);
 382}
 383static struct bin_attribute ipl_parameter_attr =
 384	__BIN_ATTR(binary_parameter, 0444, ipl_parameter_read, NULL,
 385		   PAGE_SIZE);
 386
 387static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
 388				 struct bin_attribute *attr, char *buf,
 389				 loff_t off, size_t count)
 390{
 391	unsigned int size = ipl_block.fcp.scp_data_len;
 392	void *scp_data = &ipl_block.fcp.scp_data;
 393
 394	return memory_read_from_buffer(buf, count, &off, scp_data, size);
 395}
 396
 397static ssize_t ipl_nvme_scp_data_read(struct file *filp, struct kobject *kobj,
 398				 struct bin_attribute *attr, char *buf,
 399				 loff_t off, size_t count)
 400{
 401	unsigned int size = ipl_block.nvme.scp_data_len;
 402	void *scp_data = &ipl_block.nvme.scp_data;
 403
 404	return memory_read_from_buffer(buf, count, &off, scp_data, size);
 405}
 406
 407static ssize_t ipl_eckd_scp_data_read(struct file *filp, struct kobject *kobj,
 408				      struct bin_attribute *attr, char *buf,
 409				      loff_t off, size_t count)
 410{
 411	unsigned int size = ipl_block.eckd.scp_data_len;
 412	void *scp_data = &ipl_block.eckd.scp_data;
 413
 414	return memory_read_from_buffer(buf, count, &off, scp_data, size);
 415}
 416
 417static struct bin_attribute ipl_scp_data_attr =
 418	__BIN_ATTR(scp_data, 0444, ipl_scp_data_read, NULL, PAGE_SIZE);
 419
 420static struct bin_attribute ipl_nvme_scp_data_attr =
 421	__BIN_ATTR(scp_data, 0444, ipl_nvme_scp_data_read, NULL, PAGE_SIZE);
 422
 423static struct bin_attribute ipl_eckd_scp_data_attr =
 424	__BIN_ATTR(scp_data, 0444, ipl_eckd_scp_data_read, NULL, PAGE_SIZE);
 
 
 
 
 
 
 425
 426static struct bin_attribute *ipl_fcp_bin_attrs[] = {
 427	&ipl_parameter_attr,
 428	&ipl_scp_data_attr,
 429	NULL,
 430};
 431
 432static struct bin_attribute *ipl_nvme_bin_attrs[] = {
 433	&ipl_parameter_attr,
 434	&ipl_nvme_scp_data_attr,
 435	NULL,
 436};
 437
 438static struct bin_attribute *ipl_eckd_bin_attrs[] = {
 439	&ipl_parameter_attr,
 440	&ipl_eckd_scp_data_attr,
 441	NULL,
 442};
 443
 444/* FCP ipl device attributes */
 445
 446DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n",
 447		   (unsigned long long)ipl_block.fcp.wwpn);
 448DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n",
 449		   (unsigned long long)ipl_block.fcp.lun);
 450DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n",
 451		   (unsigned long long)ipl_block.fcp.bootprog);
 452DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n",
 453		   (unsigned long long)ipl_block.fcp.br_lba);
 454
 455/* NVMe ipl device attributes */
 456DEFINE_IPL_ATTR_RO(ipl_nvme, fid, "0x%08llx\n",
 457		   (unsigned long long)ipl_block.nvme.fid);
 458DEFINE_IPL_ATTR_RO(ipl_nvme, nsid, "0x%08llx\n",
 459		   (unsigned long long)ipl_block.nvme.nsid);
 460DEFINE_IPL_ATTR_RO(ipl_nvme, bootprog, "%lld\n",
 461		   (unsigned long long)ipl_block.nvme.bootprog);
 462DEFINE_IPL_ATTR_RO(ipl_nvme, br_lba, "%lld\n",
 463		   (unsigned long long)ipl_block.nvme.br_lba);
 464
 465/* ECKD ipl device attributes */
 466DEFINE_IPL_ATTR_RO(ipl_eckd, bootprog, "%lld\n",
 467		   (unsigned long long)ipl_block.eckd.bootprog);
 468
 469#define IPL_ATTR_BR_CHR_SHOW_FN(_name, _ipb)				\
 470static ssize_t eckd_##_name##_br_chr_show(struct kobject *kobj,		\
 471					  struct kobj_attribute *attr,	\
 472					  char *buf)			\
 473{									\
 474	struct ipl_pb0_eckd *ipb = &(_ipb);				\
 475									\
 476	if (!ipb->br_chr.cyl &&						\
 477	    !ipb->br_chr.head &&					\
 478	    !ipb->br_chr.record)					\
 479		return sprintf(buf, "auto\n");				\
 480									\
 481	return sprintf(buf, "0x%x,0x%x,0x%x\n",				\
 482			ipb->br_chr.cyl,				\
 483			ipb->br_chr.head,				\
 484			ipb->br_chr.record);				\
 485}
 486
 487#define IPL_ATTR_BR_CHR_STORE_FN(_name, _ipb)				\
 488static ssize_t eckd_##_name##_br_chr_store(struct kobject *kobj,	\
 489					   struct kobj_attribute *attr,	\
 490					   const char *buf, size_t len)	\
 491{									\
 492	struct ipl_pb0_eckd *ipb = &(_ipb);				\
 493	unsigned long args[3] = { 0 };					\
 494	char *p, *p1, *tmp = NULL;					\
 495	int i, rc;							\
 496									\
 497	if (!strncmp(buf, "auto", 4))					\
 498		goto out;						\
 499									\
 500	tmp = kstrdup(buf, GFP_KERNEL);					\
 501	p = tmp;							\
 502	for (i = 0; i < 3; i++) {					\
 503		p1 = strsep(&p, ", ");					\
 504		if (!p1) {						\
 505			rc = -EINVAL;					\
 506			goto err;					\
 507		}							\
 508		rc = kstrtoul(p1, 0, args + i);				\
 509		if (rc)							\
 510			goto err;					\
 511	}								\
 512									\
 513	rc = -EINVAL;							\
 514	if (i != 3)							\
 515		goto err;						\
 516									\
 517	if ((args[0] || args[1]) && !args[2])				\
 518		goto err;						\
 519									\
 520	if (args[0] > UINT_MAX || args[1] > 255 || args[2] > 255)	\
 521		goto err;						\
 522									\
 523out:									\
 524	ipb->br_chr.cyl = args[0];					\
 525	ipb->br_chr.head = args[1];					\
 526	ipb->br_chr.record = args[2];					\
 527	rc = len;							\
 528err:									\
 529	kfree(tmp);							\
 530	return rc;							\
 531}
 532
 533IPL_ATTR_BR_CHR_SHOW_FN(ipl, ipl_block.eckd);
 534static struct kobj_attribute sys_ipl_eckd_br_chr_attr =
 535	__ATTR(br_chr, 0644, eckd_ipl_br_chr_show, NULL);
 536
 537IPL_ATTR_BR_CHR_SHOW_FN(reipl, reipl_block_eckd->eckd);
 538IPL_ATTR_BR_CHR_STORE_FN(reipl, reipl_block_eckd->eckd);
 539
 540static struct kobj_attribute sys_reipl_eckd_br_chr_attr =
 541	__ATTR(br_chr, 0644, eckd_reipl_br_chr_show, eckd_reipl_br_chr_store);
 542
 543static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
 544				     struct kobj_attribute *attr, char *page)
 545{
 546	char loadparm[LOADPARM_LEN + 1] = {};
 547
 548	if (!sclp_ipl_info.is_valid)
 549		return sprintf(page, "#unknown#\n");
 550	memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
 551	EBCASC(loadparm, LOADPARM_LEN);
 552	strim(loadparm);
 553	return sprintf(page, "%s\n", loadparm);
 554}
 555
 556static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
 557	__ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
 558
 559static struct attribute *ipl_fcp_attrs[] = {
 
 560	&sys_ipl_device_attr.attr,
 561	&sys_ipl_fcp_wwpn_attr.attr,
 562	&sys_ipl_fcp_lun_attr.attr,
 563	&sys_ipl_fcp_bootprog_attr.attr,
 564	&sys_ipl_fcp_br_lba_attr.attr,
 565	&sys_ipl_ccw_loadparm_attr.attr,
 
 566	NULL,
 567};
 568
 569static struct attribute_group ipl_fcp_attr_group = {
 570	.attrs = ipl_fcp_attrs,
 571	.bin_attrs = ipl_fcp_bin_attrs,
 572};
 573
 574static struct attribute *ipl_nvme_attrs[] = {
 575	&sys_ipl_nvme_fid_attr.attr,
 576	&sys_ipl_nvme_nsid_attr.attr,
 577	&sys_ipl_nvme_bootprog_attr.attr,
 578	&sys_ipl_nvme_br_lba_attr.attr,
 579	&sys_ipl_ccw_loadparm_attr.attr,
 580	NULL,
 581};
 582
 583static struct attribute_group ipl_nvme_attr_group = {
 584	.attrs = ipl_nvme_attrs,
 585	.bin_attrs = ipl_nvme_bin_attrs,
 586};
 587
 588static struct attribute *ipl_eckd_attrs[] = {
 589	&sys_ipl_eckd_bootprog_attr.attr,
 590	&sys_ipl_eckd_br_chr_attr.attr,
 591	&sys_ipl_ccw_loadparm_attr.attr,
 592	&sys_ipl_device_attr.attr,
 593	NULL,
 594};
 595
 596static struct attribute_group ipl_eckd_attr_group = {
 597	.attrs = ipl_eckd_attrs,
 598	.bin_attrs = ipl_eckd_bin_attrs,
 599};
 600
 601/* CCW ipl device attributes */
 602
 603static struct attribute *ipl_ccw_attrs_vm[] = {
 604	&sys_ipl_device_attr.attr,
 
 605	&sys_ipl_ccw_loadparm_attr.attr,
 606	&sys_ipl_vm_parm_attr.attr,
 607	NULL,
 608};
 609
 610static struct attribute *ipl_ccw_attrs_lpar[] = {
 611	&sys_ipl_device_attr.attr,
 612	&sys_ipl_ccw_loadparm_attr.attr,
 613	NULL,
 614};
 615
 616static struct attribute_group ipl_ccw_attr_group_vm = {
 617	.attrs = ipl_ccw_attrs_vm,
 618};
 619
 620static struct attribute_group ipl_ccw_attr_group_lpar = {
 621	.attrs = ipl_ccw_attrs_lpar
 622};
 623
 624static struct attribute *ipl_common_attrs[] = {
 625	&sys_ipl_type_attr.attr,
 626	&sys_ipl_secure_attr.attr,
 627	&sys_ipl_has_secure_attr.attr,
 628	NULL,
 629};
 630
 631static struct attribute_group ipl_common_attr_group = {
 632	.attrs = ipl_common_attrs,
 633};
 634
 635static struct kset *ipl_kset;
 636
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 637static void __ipl_run(void *unused)
 638{
 639	diag308(DIAG308_LOAD_CLEAR, NULL);
 
 
 
 
 640}
 641
 642static void ipl_run(struct shutdown_trigger *trigger)
 643{
 644	smp_call_ipl_cpu(__ipl_run, NULL);
 645}
 646
 647static int __init ipl_init(void)
 648{
 649	int rc;
 650
 651	ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
 652	if (!ipl_kset) {
 653		rc = -ENOMEM;
 654		goto out;
 655	}
 656	rc = sysfs_create_group(&ipl_kset->kobj, &ipl_common_attr_group);
 657	if (rc)
 658		goto out;
 659	switch (ipl_info.type) {
 660	case IPL_TYPE_CCW:
 661		if (MACHINE_IS_VM)
 662			rc = sysfs_create_group(&ipl_kset->kobj,
 663						&ipl_ccw_attr_group_vm);
 664		else
 665			rc = sysfs_create_group(&ipl_kset->kobj,
 666						&ipl_ccw_attr_group_lpar);
 667		break;
 668	case IPL_TYPE_ECKD:
 669	case IPL_TYPE_ECKD_DUMP:
 670		rc = sysfs_create_group(&ipl_kset->kobj, &ipl_eckd_attr_group);
 671		break;
 672	case IPL_TYPE_FCP:
 673	case IPL_TYPE_FCP_DUMP:
 674		rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
 675		break;
 676	case IPL_TYPE_NVME:
 677	case IPL_TYPE_NVME_DUMP:
 678		rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nvme_attr_group);
 679		break;
 680	default:
 
 
 681		break;
 682	}
 683out:
 684	if (rc)
 685		panic("ipl_init failed: rc = %i\n", rc);
 686
 687	return 0;
 688}
 689
 690static struct shutdown_action __refdata ipl_action = {
 691	.name	= SHUTDOWN_ACTION_IPL_STR,
 692	.fn	= ipl_run,
 693	.init	= ipl_init,
 694};
 695
 696/*
 697 * reipl shutdown action: Reboot Linux on shutdown.
 698 */
 699
 700/* VM IPL PARM attributes */
 701static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
 702					  char *page)
 703{
 704	char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
 705
 706	ipl_block_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
 707	return sprintf(page, "%s\n", vmparm);
 708}
 709
 710static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
 711					  size_t vmparm_max,
 712					  const char *buf, size_t len)
 713{
 714	int i, ip_len;
 715
 716	/* ignore trailing newline */
 717	ip_len = len;
 718	if ((len > 0) && (buf[len - 1] == '\n'))
 719		ip_len--;
 720
 721	if (ip_len > vmparm_max)
 722		return -EINVAL;
 723
 724	/* parm is used to store kernel options, check for common chars */
 725	for (i = 0; i < ip_len; i++)
 726		if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
 727			return -EINVAL;
 728
 729	memset(ipb->ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
 730	ipb->ccw.vm_parm_len = ip_len;
 731	if (ip_len > 0) {
 732		ipb->ccw.vm_flags |= IPL_PB0_CCW_VM_FLAG_VP;
 733		memcpy(ipb->ccw.vm_parm, buf, ip_len);
 734		ASCEBC(ipb->ccw.vm_parm, ip_len);
 735	} else {
 736		ipb->ccw.vm_flags &= ~IPL_PB0_CCW_VM_FLAG_VP;
 737	}
 738
 739	return len;
 740}
 741
 742/* NSS wrapper */
 743static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
 744				     struct kobj_attribute *attr, char *page)
 745{
 746	return reipl_generic_vmparm_show(reipl_block_nss, page);
 747}
 748
 749static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
 750				      struct kobj_attribute *attr,
 751				      const char *buf, size_t len)
 752{
 753	return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
 754}
 755
 756/* CCW wrapper */
 757static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
 758				     struct kobj_attribute *attr, char *page)
 759{
 760	return reipl_generic_vmparm_show(reipl_block_ccw, page);
 761}
 762
 763static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
 764				      struct kobj_attribute *attr,
 765				      const char *buf, size_t len)
 766{
 767	return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
 768}
 769
 770static struct kobj_attribute sys_reipl_nss_vmparm_attr =
 771	__ATTR(parm, 0644, reipl_nss_vmparm_show,
 772	       reipl_nss_vmparm_store);
 773static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
 774	__ATTR(parm, 0644, reipl_ccw_vmparm_show,
 775	       reipl_ccw_vmparm_store);
 776
 777/* FCP reipl device attributes */
 778
 779static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
 780				      struct bin_attribute *attr,
 781				      char *buf, loff_t off, size_t count)
 782{
 783	size_t size = reipl_block_fcp->fcp.scp_data_len;
 784	void *scp_data = reipl_block_fcp->fcp.scp_data;
 785
 786	return memory_read_from_buffer(buf, count, &off, scp_data, size);
 787}
 788
 789static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
 790				       struct bin_attribute *attr,
 791				       char *buf, loff_t off, size_t count)
 792{
 793	size_t scpdata_len = count;
 794	size_t padding;
 
 795
 796
 797	if (off)
 798		return -EINVAL;
 799
 800	memcpy(reipl_block_fcp->fcp.scp_data, buf, count);
 
 
 
 
 
 
 
 
 801	if (scpdata_len % 8) {
 802		padding = 8 - (scpdata_len % 8);
 803		memset(reipl_block_fcp->fcp.scp_data + scpdata_len,
 804		       0, padding);
 805		scpdata_len += padding;
 806	}
 807
 808	reipl_block_fcp->hdr.len = IPL_BP_FCP_LEN + scpdata_len;
 809	reipl_block_fcp->fcp.len = IPL_BP0_FCP_LEN + scpdata_len;
 810	reipl_block_fcp->fcp.scp_data_len = scpdata_len;
 811
 812	return count;
 813}
 814static struct bin_attribute sys_reipl_fcp_scp_data_attr =
 815	__BIN_ATTR(scp_data, 0644, reipl_fcp_scpdata_read,
 816		   reipl_fcp_scpdata_write, DIAG308_SCPDATA_SIZE);
 817
 818static struct bin_attribute *reipl_fcp_bin_attrs[] = {
 819	&sys_reipl_fcp_scp_data_attr,
 820	NULL,
 
 
 
 
 
 821};
 822
 823DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n",
 824		   reipl_block_fcp->fcp.wwpn);
 825DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n",
 826		   reipl_block_fcp->fcp.lun);
 827DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
 828		   reipl_block_fcp->fcp.bootprog);
 829DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
 830		   reipl_block_fcp->fcp.br_lba);
 831DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
 832		   reipl_block_fcp->fcp.devno);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 833
 834static void reipl_get_ascii_loadparm(char *loadparm,
 835				     struct ipl_parameter_block *ibp)
 836{
 837	memcpy(loadparm, ibp->common.loadparm, LOADPARM_LEN);
 838	EBCASC(loadparm, LOADPARM_LEN);
 839	loadparm[LOADPARM_LEN] = 0;
 840	strim(loadparm);
 841}
 842
 843static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
 844					   char *page)
 845{
 846	char buf[LOADPARM_LEN + 1];
 847
 848	reipl_get_ascii_loadparm(buf, ipb);
 849	return sprintf(page, "%s\n", buf);
 850}
 851
 852static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
 853					    const char *buf, size_t len)
 854{
 855	int i, lp_len;
 856
 857	/* ignore trailing newline */
 858	lp_len = len;
 859	if ((len > 0) && (buf[len - 1] == '\n'))
 860		lp_len--;
 861	/* loadparm can have max 8 characters and must not start with a blank */
 862	if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
 863		return -EINVAL;
 864	/* loadparm can only contain "a-z,A-Z,0-9,SP,." */
 865	for (i = 0; i < lp_len; i++) {
 866		if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
 867		    (buf[i] == '.'))
 868			continue;
 869		return -EINVAL;
 870	}
 871	/* initialize loadparm with blanks */
 872	memset(ipb->common.loadparm, ' ', LOADPARM_LEN);
 873	/* copy and convert to ebcdic */
 874	memcpy(ipb->common.loadparm, buf, lp_len);
 875	ASCEBC(ipb->common.loadparm, LOADPARM_LEN);
 876	ipb->common.flags |= IPL_PB0_FLAG_LOADPARM;
 877	return len;
 878}
 879
 880#define DEFINE_GENERIC_LOADPARM(name)							\
 881static ssize_t reipl_##name##_loadparm_show(struct kobject *kobj,			\
 882					    struct kobj_attribute *attr, char *page)	\
 883{											\
 884	return reipl_generic_loadparm_show(reipl_block_##name, page);			\
 885}											\
 886static ssize_t reipl_##name##_loadparm_store(struct kobject *kobj,			\
 887					     struct kobj_attribute *attr,		\
 888					     const char *buf, size_t len)		\
 889{											\
 890	return reipl_generic_loadparm_store(reipl_block_##name, buf, len);		\
 891}											\
 892static struct kobj_attribute sys_reipl_##name##_loadparm_attr =				\
 893	__ATTR(loadparm, 0644, reipl_##name##_loadparm_show,				\
 894	       reipl_##name##_loadparm_store)
 895
 896DEFINE_GENERIC_LOADPARM(fcp);
 897DEFINE_GENERIC_LOADPARM(nvme);
 898DEFINE_GENERIC_LOADPARM(ccw);
 899DEFINE_GENERIC_LOADPARM(nss);
 900DEFINE_GENERIC_LOADPARM(eckd);
 901
 902static ssize_t reipl_fcp_clear_show(struct kobject *kobj,
 903				    struct kobj_attribute *attr, char *page)
 904{
 905	return sprintf(page, "%u\n", reipl_fcp_clear);
 906}
 907
 908static ssize_t reipl_fcp_clear_store(struct kobject *kobj,
 909				     struct kobj_attribute *attr,
 910				     const char *buf, size_t len)
 911{
 912	if (kstrtobool(buf, &reipl_fcp_clear) < 0)
 913		return -EINVAL;
 914	return len;
 915}
 916
 917static struct attribute *reipl_fcp_attrs[] = {
 918	&sys_reipl_fcp_device_attr.attr,
 919	&sys_reipl_fcp_wwpn_attr.attr,
 920	&sys_reipl_fcp_lun_attr.attr,
 921	&sys_reipl_fcp_bootprog_attr.attr,
 922	&sys_reipl_fcp_br_lba_attr.attr,
 923	&sys_reipl_fcp_loadparm_attr.attr,
 924	NULL,
 925};
 926
 927static struct attribute_group reipl_fcp_attr_group = {
 928	.attrs = reipl_fcp_attrs,
 929	.bin_attrs = reipl_fcp_bin_attrs,
 930};
 931
 932static struct kobj_attribute sys_reipl_fcp_clear_attr =
 933	__ATTR(clear, 0644, reipl_fcp_clear_show, reipl_fcp_clear_store);
 934
 935/* NVME reipl device attributes */
 936
 937static ssize_t reipl_nvme_scpdata_read(struct file *filp, struct kobject *kobj,
 938				      struct bin_attribute *attr,
 939				      char *buf, loff_t off, size_t count)
 940{
 941	size_t size = reipl_block_nvme->nvme.scp_data_len;
 942	void *scp_data = reipl_block_nvme->nvme.scp_data;
 943
 944	return memory_read_from_buffer(buf, count, &off, scp_data, size);
 945}
 946
 947static ssize_t reipl_nvme_scpdata_write(struct file *filp, struct kobject *kobj,
 948				       struct bin_attribute *attr,
 949				       char *buf, loff_t off, size_t count)
 950{
 951	size_t scpdata_len = count;
 952	size_t padding;
 953
 954	if (off)
 955		return -EINVAL;
 956
 957	memcpy(reipl_block_nvme->nvme.scp_data, buf, count);
 958	if (scpdata_len % 8) {
 959		padding = 8 - (scpdata_len % 8);
 960		memset(reipl_block_nvme->nvme.scp_data + scpdata_len,
 961		       0, padding);
 962		scpdata_len += padding;
 963	}
 964
 965	reipl_block_nvme->hdr.len = IPL_BP_FCP_LEN + scpdata_len;
 966	reipl_block_nvme->nvme.len = IPL_BP0_FCP_LEN + scpdata_len;
 967	reipl_block_nvme->nvme.scp_data_len = scpdata_len;
 968
 969	return count;
 970}
 971
 972static struct bin_attribute sys_reipl_nvme_scp_data_attr =
 973	__BIN_ATTR(scp_data, 0644, reipl_nvme_scpdata_read,
 974		   reipl_nvme_scpdata_write, DIAG308_SCPDATA_SIZE);
 975
 976static struct bin_attribute *reipl_nvme_bin_attrs[] = {
 977	&sys_reipl_nvme_scp_data_attr,
 978	NULL,
 979};
 980
 981DEFINE_IPL_ATTR_RW(reipl_nvme, fid, "0x%08llx\n", "%llx\n",
 982		   reipl_block_nvme->nvme.fid);
 983DEFINE_IPL_ATTR_RW(reipl_nvme, nsid, "0x%08llx\n", "%llx\n",
 984		   reipl_block_nvme->nvme.nsid);
 985DEFINE_IPL_ATTR_RW(reipl_nvme, bootprog, "%lld\n", "%lld\n",
 986		   reipl_block_nvme->nvme.bootprog);
 987DEFINE_IPL_ATTR_RW(reipl_nvme, br_lba, "%lld\n", "%lld\n",
 988		   reipl_block_nvme->nvme.br_lba);
 989
 990static struct attribute *reipl_nvme_attrs[] = {
 991	&sys_reipl_nvme_fid_attr.attr,
 992	&sys_reipl_nvme_nsid_attr.attr,
 993	&sys_reipl_nvme_bootprog_attr.attr,
 994	&sys_reipl_nvme_br_lba_attr.attr,
 995	&sys_reipl_nvme_loadparm_attr.attr,
 996	NULL,
 997};
 998
 999static struct attribute_group reipl_nvme_attr_group = {
1000	.attrs = reipl_nvme_attrs,
1001	.bin_attrs = reipl_nvme_bin_attrs
1002};
1003
1004static ssize_t reipl_nvme_clear_show(struct kobject *kobj,
1005				     struct kobj_attribute *attr, char *page)
1006{
1007	return sprintf(page, "%u\n", reipl_nvme_clear);
1008}
1009
1010static ssize_t reipl_nvme_clear_store(struct kobject *kobj,
1011				      struct kobj_attribute *attr,
1012				      const char *buf, size_t len)
1013{
1014	if (kstrtobool(buf, &reipl_nvme_clear) < 0)
1015		return -EINVAL;
1016	return len;
1017}
1018
1019static struct kobj_attribute sys_reipl_nvme_clear_attr =
1020	__ATTR(clear, 0644, reipl_nvme_clear_show, reipl_nvme_clear_store);
1021
1022/* CCW reipl device attributes */
1023DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ccw);
1024
1025static ssize_t reipl_ccw_clear_show(struct kobject *kobj,
1026				    struct kobj_attribute *attr, char *page)
1027{
1028	return sprintf(page, "%u\n", reipl_ccw_clear);
1029}
1030
1031static ssize_t reipl_ccw_clear_store(struct kobject *kobj,
1032				     struct kobj_attribute *attr,
1033				     const char *buf, size_t len)
1034{
1035	if (kstrtobool(buf, &reipl_ccw_clear) < 0)
1036		return -EINVAL;
1037	return len;
1038}
1039
1040static struct kobj_attribute sys_reipl_ccw_clear_attr =
1041	__ATTR(clear, 0644, reipl_ccw_clear_show, reipl_ccw_clear_store);
 
1042
1043static struct attribute *reipl_ccw_attrs_vm[] = {
1044	&sys_reipl_ccw_device_attr.attr,
1045	&sys_reipl_ccw_loadparm_attr.attr,
1046	&sys_reipl_ccw_vmparm_attr.attr,
1047	&sys_reipl_ccw_clear_attr.attr,
1048	NULL,
1049};
1050
1051static struct attribute *reipl_ccw_attrs_lpar[] = {
1052	&sys_reipl_ccw_device_attr.attr,
1053	&sys_reipl_ccw_loadparm_attr.attr,
1054	&sys_reipl_ccw_clear_attr.attr,
1055	NULL,
1056};
1057
1058static struct attribute_group reipl_ccw_attr_group_vm = {
1059	.name  = IPL_CCW_STR,
1060	.attrs = reipl_ccw_attrs_vm,
1061};
1062
1063static struct attribute_group reipl_ccw_attr_group_lpar = {
1064	.name  = IPL_CCW_STR,
1065	.attrs = reipl_ccw_attrs_lpar,
1066};
1067
1068/* ECKD reipl device attributes */
1069
1070static ssize_t reipl_eckd_scpdata_read(struct file *filp, struct kobject *kobj,
1071				       struct bin_attribute *attr,
1072				       char *buf, loff_t off, size_t count)
1073{
1074	size_t size = reipl_block_eckd->eckd.scp_data_len;
1075	void *scp_data = reipl_block_eckd->eckd.scp_data;
1076
1077	return memory_read_from_buffer(buf, count, &off, scp_data, size);
1078}
1079
1080static ssize_t reipl_eckd_scpdata_write(struct file *filp, struct kobject *kobj,
1081					struct bin_attribute *attr,
1082					char *buf, loff_t off, size_t count)
1083{
1084	size_t scpdata_len = count;
1085	size_t padding;
1086
1087	if (off)
1088		return -EINVAL;
1089
1090	memcpy(reipl_block_eckd->eckd.scp_data, buf, count);
1091	if (scpdata_len % 8) {
1092		padding = 8 - (scpdata_len % 8);
1093		memset(reipl_block_eckd->eckd.scp_data + scpdata_len,
1094		       0, padding);
1095		scpdata_len += padding;
1096	}
1097
1098	reipl_block_eckd->hdr.len = IPL_BP_ECKD_LEN + scpdata_len;
1099	reipl_block_eckd->eckd.len = IPL_BP0_ECKD_LEN + scpdata_len;
1100	reipl_block_eckd->eckd.scp_data_len = scpdata_len;
1101
1102	return count;
1103}
1104
1105static struct bin_attribute sys_reipl_eckd_scp_data_attr =
1106	__BIN_ATTR(scp_data, 0644, reipl_eckd_scpdata_read,
1107		   reipl_eckd_scpdata_write, DIAG308_SCPDATA_SIZE);
1108
1109static struct bin_attribute *reipl_eckd_bin_attrs[] = {
1110	&sys_reipl_eckd_scp_data_attr,
1111	NULL,
1112};
1113
1114DEFINE_IPL_CCW_ATTR_RW(reipl_eckd, device, reipl_block_eckd->eckd);
1115DEFINE_IPL_ATTR_RW(reipl_eckd, bootprog, "%lld\n", "%lld\n",
1116		   reipl_block_eckd->eckd.bootprog);
1117
1118static struct attribute *reipl_eckd_attrs[] = {
1119	&sys_reipl_eckd_device_attr.attr,
1120	&sys_reipl_eckd_bootprog_attr.attr,
1121	&sys_reipl_eckd_br_chr_attr.attr,
1122	&sys_reipl_eckd_loadparm_attr.attr,
1123	NULL,
1124};
1125
1126static struct attribute_group reipl_eckd_attr_group = {
1127	.attrs = reipl_eckd_attrs,
1128	.bin_attrs = reipl_eckd_bin_attrs
1129};
1130
1131static ssize_t reipl_eckd_clear_show(struct kobject *kobj,
1132				     struct kobj_attribute *attr, char *page)
1133{
1134	return sprintf(page, "%u\n", reipl_eckd_clear);
1135}
1136
1137static ssize_t reipl_eckd_clear_store(struct kobject *kobj,
1138				      struct kobj_attribute *attr,
1139				      const char *buf, size_t len)
1140{
1141	if (kstrtobool(buf, &reipl_eckd_clear) < 0)
1142		return -EINVAL;
1143	return len;
1144}
1145
1146static struct kobj_attribute sys_reipl_eckd_clear_attr =
1147	__ATTR(clear, 0644, reipl_eckd_clear_show, reipl_eckd_clear_store);
1148
1149/* NSS reipl device attributes */
1150static void reipl_get_ascii_nss_name(char *dst,
1151				     struct ipl_parameter_block *ipb)
1152{
1153	memcpy(dst, ipb->ccw.nss_name, NSS_NAME_SIZE);
1154	EBCASC(dst, NSS_NAME_SIZE);
1155	dst[NSS_NAME_SIZE] = 0;
1156}
1157
1158static ssize_t reipl_nss_name_show(struct kobject *kobj,
1159				   struct kobj_attribute *attr, char *page)
1160{
1161	char nss_name[NSS_NAME_SIZE + 1] = {};
1162
1163	reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
1164	return sprintf(page, "%s\n", nss_name);
1165}
1166
1167static ssize_t reipl_nss_name_store(struct kobject *kobj,
1168				    struct kobj_attribute *attr,
1169				    const char *buf, size_t len)
1170{
1171	int nss_len;
1172
1173	/* ignore trailing newline */
1174	nss_len = len;
1175	if ((len > 0) && (buf[len - 1] == '\n'))
1176		nss_len--;
1177
1178	if (nss_len > NSS_NAME_SIZE)
1179		return -EINVAL;
1180
1181	memset(reipl_block_nss->ccw.nss_name, 0x40, NSS_NAME_SIZE);
1182	if (nss_len > 0) {
1183		reipl_block_nss->ccw.vm_flags |= IPL_PB0_CCW_VM_FLAG_NSS;
1184		memcpy(reipl_block_nss->ccw.nss_name, buf, nss_len);
1185		ASCEBC(reipl_block_nss->ccw.nss_name, nss_len);
1186		EBC_TOUPPER(reipl_block_nss->ccw.nss_name, nss_len);
 
1187	} else {
1188		reipl_block_nss->ccw.vm_flags &= ~IPL_PB0_CCW_VM_FLAG_NSS;
 
1189	}
1190
1191	return len;
1192}
1193
1194static struct kobj_attribute sys_reipl_nss_name_attr =
1195	__ATTR(name, 0644, reipl_nss_name_show,
1196	       reipl_nss_name_store);
 
 
 
 
1197
1198static struct attribute *reipl_nss_attrs[] = {
1199	&sys_reipl_nss_name_attr.attr,
1200	&sys_reipl_nss_loadparm_attr.attr,
1201	&sys_reipl_nss_vmparm_attr.attr,
1202	NULL,
1203};
1204
1205static struct attribute_group reipl_nss_attr_group = {
1206	.name  = IPL_NSS_STR,
1207	.attrs = reipl_nss_attrs,
1208};
1209
1210void set_os_info_reipl_block(void)
1211{
1212	os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual,
1213			  reipl_block_actual->hdr.len);
1214}
1215
1216/* reipl type */
1217
1218static int reipl_set_type(enum ipl_type type)
1219{
1220	if (!(reipl_capabilities & type))
1221		return -EINVAL;
1222
1223	switch(type) {
1224	case IPL_TYPE_CCW:
 
 
 
 
 
 
1225		reipl_block_actual = reipl_block_ccw;
1226		break;
1227	case IPL_TYPE_ECKD:
1228		reipl_block_actual = reipl_block_eckd;
1229		break;
1230	case IPL_TYPE_FCP:
 
 
 
 
 
 
1231		reipl_block_actual = reipl_block_fcp;
1232		break;
1233	case IPL_TYPE_NVME:
1234		reipl_block_actual = reipl_block_nvme;
1235		break;
1236	case IPL_TYPE_NSS:
 
 
 
 
1237		reipl_block_actual = reipl_block_nss;
1238		break;
1239	default:
 
1240		break;
 
 
1241	}
1242	reipl_type = type;
1243	return 0;
1244}
1245
1246static ssize_t reipl_type_show(struct kobject *kobj,
1247			       struct kobj_attribute *attr, char *page)
1248{
1249	return sprintf(page, "%s\n", ipl_type_str(reipl_type));
1250}
1251
1252static ssize_t reipl_type_store(struct kobject *kobj,
1253				struct kobj_attribute *attr,
1254				const char *buf, size_t len)
1255{
1256	int rc = -EINVAL;
1257
1258	if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1259		rc = reipl_set_type(IPL_TYPE_CCW);
1260	else if (strncmp(buf, IPL_ECKD_STR, strlen(IPL_ECKD_STR)) == 0)
1261		rc = reipl_set_type(IPL_TYPE_ECKD);
1262	else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1263		rc = reipl_set_type(IPL_TYPE_FCP);
1264	else if (strncmp(buf, IPL_NVME_STR, strlen(IPL_NVME_STR)) == 0)
1265		rc = reipl_set_type(IPL_TYPE_NVME);
1266	else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1267		rc = reipl_set_type(IPL_TYPE_NSS);
1268	return (rc != 0) ? rc : len;
1269}
1270
1271static struct kobj_attribute reipl_type_attr =
1272	__ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
1273
1274static struct kset *reipl_kset;
1275static struct kset *reipl_fcp_kset;
1276static struct kset *reipl_nvme_kset;
1277static struct kset *reipl_eckd_kset;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1278
1279static void __reipl_run(void *unused)
1280{
1281	switch (reipl_type) {
1282	case IPL_TYPE_CCW:
1283		diag308(DIAG308_SET, reipl_block_ccw);
1284		if (reipl_ccw_clear)
1285			diag308(DIAG308_LOAD_CLEAR, NULL);
1286		else
1287			diag308(DIAG308_LOAD_NORMAL_DUMP, NULL);
 
 
 
 
 
1288		break;
1289	case IPL_TYPE_ECKD:
1290		diag308(DIAG308_SET, reipl_block_eckd);
1291		if (reipl_eckd_clear)
1292			diag308(DIAG308_LOAD_CLEAR, NULL);
1293		else
1294			diag308(DIAG308_LOAD_NORMAL, NULL);
1295		break;
1296	case IPL_TYPE_FCP:
1297		diag308(DIAG308_SET, reipl_block_fcp);
1298		if (reipl_fcp_clear)
1299			diag308(DIAG308_LOAD_CLEAR, NULL);
1300		else
1301			diag308(DIAG308_LOAD_NORMAL, NULL);
1302		break;
1303	case IPL_TYPE_NVME:
1304		diag308(DIAG308_SET, reipl_block_nvme);
1305		if (reipl_nvme_clear)
1306			diag308(DIAG308_LOAD_CLEAR, NULL);
1307		else
1308			diag308(DIAG308_LOAD_NORMAL, NULL);
1309		break;
1310	case IPL_TYPE_NSS:
 
 
 
1311		diag308(DIAG308_SET, reipl_block_nss);
1312		diag308(DIAG308_LOAD_CLEAR, NULL);
1313		break;
1314	case IPL_TYPE_UNKNOWN:
1315		diag308(DIAG308_LOAD_CLEAR, NULL);
 
1316		break;
1317	case IPL_TYPE_FCP_DUMP:
1318	case IPL_TYPE_NVME_DUMP:
1319	case IPL_TYPE_ECKD_DUMP:
 
 
 
1320		break;
1321	}
1322	disabled_wait();
1323}
1324
1325static void reipl_run(struct shutdown_trigger *trigger)
1326{
1327	smp_call_ipl_cpu(__reipl_run, NULL);
1328}
1329
1330static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
1331{
1332	ipb->hdr.len = IPL_BP_CCW_LEN;
1333	ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1334	ipb->pb0_hdr.len = IPL_BP0_CCW_LEN;
1335	ipb->pb0_hdr.pbt = IPL_PBT_CCW;
1336}
1337
1338static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1339{
1340	/* LOADPARM */
1341	/* check if read scp info worked and set loadparm */
1342	if (sclp_ipl_info.is_valid)
1343		memcpy(ipb->ccw.loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
 
1344	else
1345		/* read scp info failed: set empty loadparm (EBCDIC blanks) */
1346		memset(ipb->ccw.loadparm, 0x40, LOADPARM_LEN);
1347	ipb->ccw.flags = IPL_PB0_FLAG_LOADPARM;
1348
1349	/* VM PARM */
1350	if (MACHINE_IS_VM && ipl_block_valid &&
1351	    (ipl_block.ccw.vm_flags & IPL_PB0_CCW_VM_FLAG_VP)) {
1352
1353		ipb->ccw.vm_flags |= IPL_PB0_CCW_VM_FLAG_VP;
1354		ipb->ccw.vm_parm_len = ipl_block.ccw.vm_parm_len;
1355		memcpy(ipb->ccw.vm_parm,
1356		       ipl_block.ccw.vm_parm, DIAG308_VMPARM_SIZE);
 
1357	}
1358}
1359
1360static int __init reipl_nss_init(void)
1361{
1362	int rc;
1363
1364	if (!MACHINE_IS_VM)
1365		return 0;
1366
1367	reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1368	if (!reipl_block_nss)
1369		return -ENOMEM;
1370
 
 
 
1371	rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1372	if (rc)
1373		return rc;
1374
1375	reipl_block_ccw_init(reipl_block_nss);
 
 
 
 
 
 
 
 
 
 
 
 
1376	reipl_capabilities |= IPL_TYPE_NSS;
1377	return 0;
1378}
1379
1380static int __init reipl_ccw_init(void)
1381{
1382	int rc;
1383
1384	reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1385	if (!reipl_block_ccw)
1386		return -ENOMEM;
1387
1388	rc = sysfs_create_group(&reipl_kset->kobj,
1389				MACHINE_IS_VM ? &reipl_ccw_attr_group_vm
1390					      : &reipl_ccw_attr_group_lpar);
 
 
 
 
 
 
 
 
1391	if (rc)
1392		return rc;
1393
1394	reipl_block_ccw_init(reipl_block_ccw);
1395	if (ipl_info.type == IPL_TYPE_CCW) {
1396		reipl_block_ccw->ccw.ssid = ipl_block.ccw.ssid;
1397		reipl_block_ccw->ccw.devno = ipl_block.ccw.devno;
1398		reipl_block_ccw_fill_parms(reipl_block_ccw);
1399	}
1400
1401	reipl_capabilities |= IPL_TYPE_CCW;
1402	return 0;
1403}
1404
1405static int __init reipl_fcp_init(void)
1406{
1407	int rc;
1408
 
 
 
 
 
 
 
 
1409	reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1410	if (!reipl_block_fcp)
1411		return -ENOMEM;
1412
1413	/* sysfs: create fcp kset for mixing attr group and bin attrs */
1414	reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1415					     &reipl_kset->kobj);
1416	if (!reipl_fcp_kset) {
1417		free_page((unsigned long) reipl_block_fcp);
1418		return -ENOMEM;
1419	}
1420
1421	rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1422	if (rc)
1423		goto out1;
 
 
 
1424
1425	if (test_facility(141)) {
1426		rc = sysfs_create_file(&reipl_fcp_kset->kobj,
1427				       &sys_reipl_fcp_clear_attr.attr);
1428		if (rc)
1429			goto out2;
1430	} else {
1431		reipl_fcp_clear = true;
1432	}
1433
1434	if (ipl_info.type == IPL_TYPE_FCP) {
1435		memcpy(reipl_block_fcp, &ipl_block, sizeof(ipl_block));
1436		/*
1437		 * Fix loadparm: There are systems where the (SCSI) LOADPARM
1438		 * is invalid in the SCSI IPL parameter block, so take it
1439		 * always from sclp_ipl_info.
1440		 */
1441		memcpy(reipl_block_fcp->fcp.loadparm, sclp_ipl_info.loadparm,
1442		       LOADPARM_LEN);
1443	} else {
1444		reipl_block_fcp->hdr.len = IPL_BP_FCP_LEN;
1445		reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1446		reipl_block_fcp->fcp.len = IPL_BP0_FCP_LEN;
1447		reipl_block_fcp->fcp.pbt = IPL_PBT_FCP;
1448		reipl_block_fcp->fcp.opt = IPL_PB0_FCP_OPT_IPL;
1449	}
1450	reipl_capabilities |= IPL_TYPE_FCP;
1451	return 0;
1452
1453out2:
1454	sysfs_remove_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1455out1:
1456	kset_unregister(reipl_fcp_kset);
1457	free_page((unsigned long) reipl_block_fcp);
1458	return rc;
1459}
1460
1461static int __init reipl_nvme_init(void)
1462{
1463	int rc;
1464
1465	reipl_block_nvme = (void *) get_zeroed_page(GFP_KERNEL);
1466	if (!reipl_block_nvme)
1467		return -ENOMEM;
1468
1469	/* sysfs: create kset for mixing attr group and bin attrs */
1470	reipl_nvme_kset = kset_create_and_add(IPL_NVME_STR, NULL,
1471					     &reipl_kset->kobj);
1472	if (!reipl_nvme_kset) {
1473		free_page((unsigned long) reipl_block_nvme);
1474		return -ENOMEM;
1475	}
1476
1477	rc = sysfs_create_group(&reipl_nvme_kset->kobj, &reipl_nvme_attr_group);
1478	if (rc)
1479		goto out1;
1480
1481	if (test_facility(141)) {
1482		rc = sysfs_create_file(&reipl_nvme_kset->kobj,
1483				       &sys_reipl_nvme_clear_attr.attr);
1484		if (rc)
1485			goto out2;
1486	} else {
1487		reipl_nvme_clear = true;
1488	}
1489
1490	if (ipl_info.type == IPL_TYPE_NVME) {
1491		memcpy(reipl_block_nvme, &ipl_block, sizeof(ipl_block));
1492		/*
1493		 * Fix loadparm: There are systems where the (SCSI) LOADPARM
1494		 * is invalid in the IPL parameter block, so take it
1495		 * always from sclp_ipl_info.
1496		 */
1497		memcpy(reipl_block_nvme->nvme.loadparm, sclp_ipl_info.loadparm,
1498		       LOADPARM_LEN);
1499	} else {
1500		reipl_block_nvme->hdr.len = IPL_BP_NVME_LEN;
1501		reipl_block_nvme->hdr.version = IPL_PARM_BLOCK_VERSION;
1502		reipl_block_nvme->nvme.len = IPL_BP0_NVME_LEN;
1503		reipl_block_nvme->nvme.pbt = IPL_PBT_NVME;
1504		reipl_block_nvme->nvme.opt = IPL_PB0_NVME_OPT_IPL;
1505	}
1506	reipl_capabilities |= IPL_TYPE_NVME;
1507	return 0;
1508
1509out2:
1510	sysfs_remove_group(&reipl_nvme_kset->kobj, &reipl_nvme_attr_group);
1511out1:
1512	kset_unregister(reipl_nvme_kset);
1513	free_page((unsigned long) reipl_block_nvme);
1514	return rc;
1515}
1516
1517static int __init reipl_eckd_init(void)
1518{
1519	int rc;
1520
1521	if (!sclp.has_sipl_eckd)
1522		return 0;
1523
1524	reipl_block_eckd = (void *)get_zeroed_page(GFP_KERNEL);
1525	if (!reipl_block_eckd)
1526		return -ENOMEM;
1527
1528	/* sysfs: create kset for mixing attr group and bin attrs */
1529	reipl_eckd_kset = kset_create_and_add(IPL_ECKD_STR, NULL,
1530					      &reipl_kset->kobj);
1531	if (!reipl_eckd_kset) {
1532		free_page((unsigned long)reipl_block_eckd);
1533		return -ENOMEM;
1534	}
1535
1536	rc = sysfs_create_group(&reipl_eckd_kset->kobj, &reipl_eckd_attr_group);
1537	if (rc)
1538		goto out1;
1539
1540	if (test_facility(141)) {
1541		rc = sysfs_create_file(&reipl_eckd_kset->kobj,
1542				       &sys_reipl_eckd_clear_attr.attr);
1543		if (rc)
1544			goto out2;
1545	} else {
1546		reipl_eckd_clear = true;
1547	}
1548
1549	if (ipl_info.type == IPL_TYPE_ECKD) {
1550		memcpy(reipl_block_eckd, &ipl_block, sizeof(ipl_block));
1551	} else {
1552		reipl_block_eckd->hdr.len = IPL_BP_ECKD_LEN;
1553		reipl_block_eckd->hdr.version = IPL_PARM_BLOCK_VERSION;
1554		reipl_block_eckd->eckd.len = IPL_BP0_ECKD_LEN;
1555		reipl_block_eckd->eckd.pbt = IPL_PBT_ECKD;
1556		reipl_block_eckd->eckd.opt = IPL_PB0_ECKD_OPT_IPL;
1557	}
1558	reipl_capabilities |= IPL_TYPE_ECKD;
1559	return 0;
1560
1561out2:
1562	sysfs_remove_group(&reipl_eckd_kset->kobj, &reipl_eckd_attr_group);
1563out1:
1564	kset_unregister(reipl_eckd_kset);
1565	free_page((unsigned long)reipl_block_eckd);
1566	return rc;
1567}
1568
1569static int __init reipl_type_init(void)
1570{
1571	enum ipl_type reipl_type = ipl_info.type;
1572	struct ipl_parameter_block *reipl_block;
1573	unsigned long size;
1574
1575	reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size);
1576	if (!reipl_block)
1577		goto out;
1578	/*
1579	 * If we have an OS info reipl block, this will be used
1580	 */
1581	if (reipl_block->pb0_hdr.pbt == IPL_PBT_FCP) {
1582		memcpy(reipl_block_fcp, reipl_block, size);
1583		reipl_type = IPL_TYPE_FCP;
1584	} else if (reipl_block->pb0_hdr.pbt == IPL_PBT_NVME) {
1585		memcpy(reipl_block_nvme, reipl_block, size);
1586		reipl_type = IPL_TYPE_NVME;
1587	} else if (reipl_block->pb0_hdr.pbt == IPL_PBT_CCW) {
1588		memcpy(reipl_block_ccw, reipl_block, size);
1589		reipl_type = IPL_TYPE_CCW;
1590	} else if (reipl_block->pb0_hdr.pbt == IPL_PBT_ECKD) {
1591		memcpy(reipl_block_eckd, reipl_block, size);
1592		reipl_type = IPL_TYPE_ECKD;
1593	}
1594out:
1595	return reipl_set_type(reipl_type);
1596}
1597
1598static int __init reipl_init(void)
1599{
1600	int rc;
1601
1602	reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1603	if (!reipl_kset)
1604		return -ENOMEM;
1605	rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1606	if (rc) {
1607		kset_unregister(reipl_kset);
1608		return rc;
1609	}
1610	rc = reipl_ccw_init();
1611	if (rc)
1612		return rc;
1613	rc = reipl_eckd_init();
1614	if (rc)
1615		return rc;
1616	rc = reipl_fcp_init();
1617	if (rc)
1618		return rc;
1619	rc = reipl_nvme_init();
1620	if (rc)
1621		return rc;
1622	rc = reipl_nss_init();
1623	if (rc)
1624		return rc;
1625	return reipl_type_init();
1626}
1627
1628static struct shutdown_action __refdata reipl_action = {
1629	.name	= SHUTDOWN_ACTION_REIPL_STR,
1630	.fn	= reipl_run,
1631	.init	= reipl_init,
1632};
1633
1634/*
1635 * dump shutdown action: Dump Linux on shutdown.
1636 */
1637
1638/* FCP dump device attributes */
1639
1640DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n",
1641		   dump_block_fcp->fcp.wwpn);
1642DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n",
1643		   dump_block_fcp->fcp.lun);
1644DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1645		   dump_block_fcp->fcp.bootprog);
1646DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1647		   dump_block_fcp->fcp.br_lba);
1648DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1649		   dump_block_fcp->fcp.devno);
1650
1651static struct attribute *dump_fcp_attrs[] = {
1652	&sys_dump_fcp_device_attr.attr,
1653	&sys_dump_fcp_wwpn_attr.attr,
1654	&sys_dump_fcp_lun_attr.attr,
1655	&sys_dump_fcp_bootprog_attr.attr,
1656	&sys_dump_fcp_br_lba_attr.attr,
1657	NULL,
1658};
1659
1660static struct attribute_group dump_fcp_attr_group = {
1661	.name  = IPL_FCP_STR,
1662	.attrs = dump_fcp_attrs,
1663};
1664
1665/* NVME dump device attributes */
1666DEFINE_IPL_ATTR_RW(dump_nvme, fid, "0x%08llx\n", "%llx\n",
1667		   dump_block_nvme->nvme.fid);
1668DEFINE_IPL_ATTR_RW(dump_nvme, nsid, "0x%08llx\n", "%llx\n",
1669		   dump_block_nvme->nvme.nsid);
1670DEFINE_IPL_ATTR_RW(dump_nvme, bootprog, "%lld\n", "%llx\n",
1671		   dump_block_nvme->nvme.bootprog);
1672DEFINE_IPL_ATTR_RW(dump_nvme, br_lba, "%lld\n", "%llx\n",
1673		   dump_block_nvme->nvme.br_lba);
1674
1675static struct attribute *dump_nvme_attrs[] = {
1676	&sys_dump_nvme_fid_attr.attr,
1677	&sys_dump_nvme_nsid_attr.attr,
1678	&sys_dump_nvme_bootprog_attr.attr,
1679	&sys_dump_nvme_br_lba_attr.attr,
1680	NULL,
1681};
1682
1683static struct attribute_group dump_nvme_attr_group = {
1684	.name  = IPL_NVME_STR,
1685	.attrs = dump_nvme_attrs,
1686};
1687
1688/* ECKD dump device attributes */
1689DEFINE_IPL_CCW_ATTR_RW(dump_eckd, device, dump_block_eckd->eckd);
1690DEFINE_IPL_ATTR_RW(dump_eckd, bootprog, "%lld\n", "%llx\n",
1691		   dump_block_eckd->eckd.bootprog);
1692
1693IPL_ATTR_BR_CHR_SHOW_FN(dump, dump_block_eckd->eckd);
1694IPL_ATTR_BR_CHR_STORE_FN(dump, dump_block_eckd->eckd);
1695
1696static struct kobj_attribute sys_dump_eckd_br_chr_attr =
1697	__ATTR(br_chr, 0644, eckd_dump_br_chr_show, eckd_dump_br_chr_store);
1698
1699static struct attribute *dump_eckd_attrs[] = {
1700	&sys_dump_eckd_device_attr.attr,
1701	&sys_dump_eckd_bootprog_attr.attr,
1702	&sys_dump_eckd_br_chr_attr.attr,
1703	NULL,
1704};
1705
1706static struct attribute_group dump_eckd_attr_group = {
1707	.name  = IPL_ECKD_STR,
1708	.attrs = dump_eckd_attrs,
1709};
1710
1711/* CCW dump device attributes */
1712DEFINE_IPL_CCW_ATTR_RW(dump_ccw, device, dump_block_ccw->ccw);
 
 
1713
1714static struct attribute *dump_ccw_attrs[] = {
1715	&sys_dump_ccw_device_attr.attr,
1716	NULL,
1717};
1718
1719static struct attribute_group dump_ccw_attr_group = {
1720	.name  = IPL_CCW_STR,
1721	.attrs = dump_ccw_attrs,
1722};
1723
1724/* dump type */
1725
1726static int dump_set_type(enum dump_type type)
1727{
1728	if (!(dump_capabilities & type))
1729		return -EINVAL;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1730	dump_type = type;
1731	return 0;
1732}
1733
1734static ssize_t dump_type_show(struct kobject *kobj,
1735			      struct kobj_attribute *attr, char *page)
1736{
1737	return sprintf(page, "%s\n", dump_type_str(dump_type));
1738}
1739
1740static ssize_t dump_type_store(struct kobject *kobj,
1741			       struct kobj_attribute *attr,
1742			       const char *buf, size_t len)
1743{
1744	int rc = -EINVAL;
1745
1746	if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1747		rc = dump_set_type(DUMP_TYPE_NONE);
1748	else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1749		rc = dump_set_type(DUMP_TYPE_CCW);
1750	else if (strncmp(buf, DUMP_ECKD_STR, strlen(DUMP_ECKD_STR)) == 0)
1751		rc = dump_set_type(DUMP_TYPE_ECKD);
1752	else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1753		rc = dump_set_type(DUMP_TYPE_FCP);
1754	else if (strncmp(buf, DUMP_NVME_STR, strlen(DUMP_NVME_STR)) == 0)
1755		rc = dump_set_type(DUMP_TYPE_NVME);
1756	return (rc != 0) ? rc : len;
1757}
1758
1759static struct kobj_attribute dump_type_attr =
1760	__ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1761
1762static struct kset *dump_kset;
1763
1764static void diag308_dump(void *dump_block)
1765{
1766	diag308(DIAG308_SET, dump_block);
1767	while (1) {
1768		if (diag308(DIAG308_LOAD_NORMAL_DUMP, NULL) != 0x302)
1769			break;
1770		udelay(USEC_PER_SEC);
1771	}
1772}
1773
1774static void __dump_run(void *unused)
1775{
1776	switch (dump_type) {
1777	case DUMP_TYPE_CCW:
1778		diag308_dump(dump_block_ccw);
1779		break;
1780	case DUMP_TYPE_ECKD:
1781		diag308_dump(dump_block_eckd);
1782		break;
1783	case DUMP_TYPE_FCP:
1784		diag308_dump(dump_block_fcp);
1785		break;
1786	case DUMP_TYPE_NVME:
1787		diag308_dump(dump_block_nvme);
 
 
 
 
 
 
 
 
 
 
1788		break;
1789	default:
1790		break;
1791	}
1792}
1793
1794static void dump_run(struct shutdown_trigger *trigger)
1795{
1796	if (dump_type == DUMP_TYPE_NONE)
1797		return;
1798	smp_send_stop();
1799	smp_call_ipl_cpu(__dump_run, NULL);
1800}
1801
1802static int __init dump_ccw_init(void)
1803{
1804	int rc;
1805
1806	dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1807	if (!dump_block_ccw)
1808		return -ENOMEM;
1809	rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1810	if (rc) {
1811		free_page((unsigned long)dump_block_ccw);
1812		return rc;
1813	}
1814	dump_block_ccw->hdr.len = IPL_BP_CCW_LEN;
1815	dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1816	dump_block_ccw->ccw.len = IPL_BP0_CCW_LEN;
1817	dump_block_ccw->ccw.pbt = IPL_PBT_CCW;
1818	dump_capabilities |= DUMP_TYPE_CCW;
1819	return 0;
1820}
1821
1822static int __init dump_fcp_init(void)
1823{
1824	int rc;
1825
1826	if (!sclp_ipl_info.has_dump)
1827		return 0; /* LDIPL DUMP is not installed */
 
 
1828	dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1829	if (!dump_block_fcp)
1830		return -ENOMEM;
1831	rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1832	if (rc) {
1833		free_page((unsigned long)dump_block_fcp);
1834		return rc;
1835	}
1836	dump_block_fcp->hdr.len = IPL_BP_FCP_LEN;
1837	dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1838	dump_block_fcp->fcp.len = IPL_BP0_FCP_LEN;
1839	dump_block_fcp->fcp.pbt = IPL_PBT_FCP;
1840	dump_block_fcp->fcp.opt = IPL_PB0_FCP_OPT_DUMP;
1841	dump_capabilities |= DUMP_TYPE_FCP;
1842	return 0;
1843}
1844
1845static int __init dump_nvme_init(void)
1846{
1847	int rc;
1848
1849	if (!sclp_ipl_info.has_dump)
1850		return 0; /* LDIPL DUMP is not installed */
1851	dump_block_nvme = (void *) get_zeroed_page(GFP_KERNEL);
1852	if (!dump_block_nvme)
1853		return -ENOMEM;
1854	rc = sysfs_create_group(&dump_kset->kobj, &dump_nvme_attr_group);
1855	if (rc) {
1856		free_page((unsigned long)dump_block_nvme);
1857		return rc;
1858	}
1859	dump_block_nvme->hdr.len = IPL_BP_NVME_LEN;
1860	dump_block_nvme->hdr.version = IPL_PARM_BLOCK_VERSION;
1861	dump_block_nvme->fcp.len = IPL_BP0_NVME_LEN;
1862	dump_block_nvme->fcp.pbt = IPL_PBT_NVME;
1863	dump_block_nvme->fcp.opt = IPL_PB0_NVME_OPT_DUMP;
1864	dump_capabilities |= DUMP_TYPE_NVME;
1865	return 0;
1866}
1867
1868static int __init dump_eckd_init(void)
1869{
1870	int rc;
1871
1872	if (!sclp_ipl_info.has_dump || !sclp.has_sipl_eckd)
1873		return 0; /* LDIPL DUMP is not installed */
1874	dump_block_eckd = (void *)get_zeroed_page(GFP_KERNEL);
1875	if (!dump_block_eckd)
1876		return -ENOMEM;
1877	rc = sysfs_create_group(&dump_kset->kobj, &dump_eckd_attr_group);
1878	if (rc) {
1879		free_page((unsigned long)dump_block_eckd);
1880		return rc;
1881	}
1882	dump_block_eckd->hdr.len = IPL_BP_ECKD_LEN;
1883	dump_block_eckd->hdr.version = IPL_PARM_BLOCK_VERSION;
1884	dump_block_eckd->eckd.len = IPL_BP0_ECKD_LEN;
1885	dump_block_eckd->eckd.pbt = IPL_PBT_ECKD;
1886	dump_block_eckd->eckd.opt = IPL_PB0_ECKD_OPT_DUMP;
1887	dump_capabilities |= DUMP_TYPE_ECKD;
1888	return 0;
1889}
1890
1891static int __init dump_init(void)
1892{
1893	int rc;
1894
1895	dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1896	if (!dump_kset)
1897		return -ENOMEM;
1898	rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1899	if (rc) {
1900		kset_unregister(dump_kset);
1901		return rc;
1902	}
1903	rc = dump_ccw_init();
1904	if (rc)
1905		return rc;
1906	rc = dump_eckd_init();
1907	if (rc)
1908		return rc;
1909	rc = dump_fcp_init();
1910	if (rc)
1911		return rc;
1912	rc = dump_nvme_init();
1913	if (rc)
1914		return rc;
1915	dump_set_type(DUMP_TYPE_NONE);
1916	return 0;
1917}
1918
1919static struct shutdown_action __refdata dump_action = {
1920	.name	= SHUTDOWN_ACTION_DUMP_STR,
1921	.fn	= dump_run,
1922	.init	= dump_init,
1923};
1924
1925static void dump_reipl_run(struct shutdown_trigger *trigger)
1926{
1927	struct lowcore *abs_lc;
1928	unsigned int csum;
1929
1930	/*
1931	 * Set REIPL_CLEAR flag in os_info flags entry indicating
1932	 * 'clear' sysfs attribute has been set on the panicked system
1933	 * for specified reipl type.
1934	 * Always set for IPL_TYPE_NSS and IPL_TYPE_UNKNOWN.
 
 
 
1935	 */
1936	if ((reipl_type == IPL_TYPE_CCW && reipl_ccw_clear) ||
1937	    (reipl_type == IPL_TYPE_ECKD && reipl_eckd_clear) ||
1938	    (reipl_type == IPL_TYPE_FCP && reipl_fcp_clear) ||
1939	    (reipl_type == IPL_TYPE_NVME && reipl_nvme_clear) ||
1940	    reipl_type == IPL_TYPE_NSS ||
1941	    reipl_type == IPL_TYPE_UNKNOWN)
1942		os_info_flags |= OS_INFO_FLAG_REIPL_CLEAR;
1943	os_info_entry_add(OS_INFO_FLAGS_ENTRY, &os_info_flags, sizeof(os_info_flags));
1944	csum = (__force unsigned int)
1945	       csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
1946	abs_lc = get_abs_lowcore();
1947	abs_lc->ipib = __pa(reipl_block_actual);
1948	abs_lc->ipib_checksum = csum;
1949	put_abs_lowcore(abs_lc);
1950	dump_run(trigger);
1951}
1952
 
 
 
 
 
 
 
 
1953static struct shutdown_action __refdata dump_reipl_action = {
1954	.name	= SHUTDOWN_ACTION_DUMP_REIPL_STR,
1955	.fn	= dump_reipl_run,
 
1956};
1957
1958/*
1959 * vmcmd shutdown action: Trigger vm command on shutdown.
1960 */
1961
1962static char vmcmd_on_reboot[128];
1963static char vmcmd_on_panic[128];
1964static char vmcmd_on_halt[128];
1965static char vmcmd_on_poff[128];
1966static char vmcmd_on_restart[128];
1967
1968DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1969DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1970DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1971DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1972DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1973
1974static struct attribute *vmcmd_attrs[] = {
1975	&sys_vmcmd_on_reboot_attr.attr,
1976	&sys_vmcmd_on_panic_attr.attr,
1977	&sys_vmcmd_on_halt_attr.attr,
1978	&sys_vmcmd_on_poff_attr.attr,
1979	&sys_vmcmd_on_restart_attr.attr,
1980	NULL,
1981};
1982
1983static struct attribute_group vmcmd_attr_group = {
1984	.attrs = vmcmd_attrs,
1985};
1986
1987static struct kset *vmcmd_kset;
1988
1989static void vmcmd_run(struct shutdown_trigger *trigger)
1990{
1991	char *cmd;
1992
1993	if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1994		cmd = vmcmd_on_reboot;
1995	else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1996		cmd = vmcmd_on_panic;
1997	else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1998		cmd = vmcmd_on_halt;
1999	else if (strcmp(trigger->name, ON_POFF_STR) == 0)
2000		cmd = vmcmd_on_poff;
2001	else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
2002		cmd = vmcmd_on_restart;
2003	else
2004		return;
2005
2006	if (strlen(cmd) == 0)
2007		return;
2008	__cpcmd(cmd, NULL, 0, NULL);
 
 
 
 
 
 
 
 
2009}
2010
2011static int vmcmd_init(void)
2012{
2013	if (!MACHINE_IS_VM)
2014		return -EOPNOTSUPP;
2015	vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
2016	if (!vmcmd_kset)
2017		return -ENOMEM;
2018	return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
2019}
2020
2021static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
2022					      vmcmd_run, vmcmd_init};
2023
2024/*
2025 * stop shutdown action: Stop Linux on shutdown.
2026 */
2027
2028static void stop_run(struct shutdown_trigger *trigger)
2029{
2030	if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
2031	    strcmp(trigger->name, ON_RESTART_STR) == 0)
2032		disabled_wait();
2033	smp_stop_cpu();
 
 
2034}
2035
2036static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
2037					     stop_run, NULL};
2038
2039/* action list */
2040
2041static struct shutdown_action *shutdown_actions_list[] = {
2042	&ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
2043	&vmcmd_action, &stop_action};
2044#define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
2045
2046/*
2047 * Trigger section
2048 */
2049
2050static struct kset *shutdown_actions_kset;
2051
2052static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
2053		       size_t len)
2054{
2055	int i;
2056
2057	for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
2058		if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
2059			if (shutdown_actions_list[i]->init_rc) {
2060				return shutdown_actions_list[i]->init_rc;
2061			} else {
2062				trigger->action = shutdown_actions_list[i];
2063				return len;
2064			}
2065		}
2066	}
2067	return -EINVAL;
2068}
2069
2070/* on reipl */
2071
2072static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
2073						    &reipl_action};
2074
2075static ssize_t on_reboot_show(struct kobject *kobj,
2076			      struct kobj_attribute *attr, char *page)
2077{
2078	return sprintf(page, "%s\n", on_reboot_trigger.action->name);
2079}
2080
2081static ssize_t on_reboot_store(struct kobject *kobj,
2082			       struct kobj_attribute *attr,
2083			       const char *buf, size_t len)
2084{
2085	return set_trigger(buf, &on_reboot_trigger, len);
2086}
2087static struct kobj_attribute on_reboot_attr = __ATTR_RW(on_reboot);
 
 
2088
2089static void do_machine_restart(char *__unused)
2090{
2091	smp_send_stop();
2092	on_reboot_trigger.action->fn(&on_reboot_trigger);
2093	reipl_run(NULL);
2094}
2095void (*_machine_restart)(char *command) = do_machine_restart;
2096
2097/* on panic */
2098
2099static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
2100
2101static ssize_t on_panic_show(struct kobject *kobj,
2102			     struct kobj_attribute *attr, char *page)
2103{
2104	return sprintf(page, "%s\n", on_panic_trigger.action->name);
2105}
2106
2107static ssize_t on_panic_store(struct kobject *kobj,
2108			      struct kobj_attribute *attr,
2109			      const char *buf, size_t len)
2110{
2111	return set_trigger(buf, &on_panic_trigger, len);
2112}
2113static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic);
 
 
2114
2115static void do_panic(void)
2116{
2117	lgr_info_log();
2118	on_panic_trigger.action->fn(&on_panic_trigger);
2119	stop_run(&on_panic_trigger);
2120}
2121
2122/* on restart */
2123
2124static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
2125	&stop_action};
2126
2127static ssize_t on_restart_show(struct kobject *kobj,
2128			       struct kobj_attribute *attr, char *page)
2129{
2130	return sprintf(page, "%s\n", on_restart_trigger.action->name);
2131}
2132
2133static ssize_t on_restart_store(struct kobject *kobj,
2134				struct kobj_attribute *attr,
2135				const char *buf, size_t len)
2136{
2137	return set_trigger(buf, &on_restart_trigger, len);
2138}
2139static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart);
2140
2141static void __do_restart(void *ignore)
 
 
 
2142{
2143	smp_send_stop();
2144#ifdef CONFIG_CRASH_DUMP
2145	crash_kexec(NULL);
2146#endif
2147	on_restart_trigger.action->fn(&on_restart_trigger);
2148	stop_run(&on_restart_trigger);
2149}
2150
2151void do_restart(void *arg)
2152{
2153	tracing_off();
2154	debug_locks_off();
2155	lgr_info_log();
2156	smp_call_online_cpu(__do_restart, arg);
2157}
2158
2159/* on halt */
2160
2161static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
2162
2163static ssize_t on_halt_show(struct kobject *kobj,
2164			    struct kobj_attribute *attr, char *page)
2165{
2166	return sprintf(page, "%s\n", on_halt_trigger.action->name);
2167}
2168
2169static ssize_t on_halt_store(struct kobject *kobj,
2170			     struct kobj_attribute *attr,
2171			     const char *buf, size_t len)
2172{
2173	return set_trigger(buf, &on_halt_trigger, len);
2174}
2175static struct kobj_attribute on_halt_attr = __ATTR_RW(on_halt);
 
 
 
2176
2177static void do_machine_halt(void)
2178{
2179	smp_send_stop();
2180	on_halt_trigger.action->fn(&on_halt_trigger);
2181	stop_run(&on_halt_trigger);
2182}
2183void (*_machine_halt)(void) = do_machine_halt;
2184
2185/* on power off */
2186
2187static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
2188
2189static ssize_t on_poff_show(struct kobject *kobj,
2190			    struct kobj_attribute *attr, char *page)
2191{
2192	return sprintf(page, "%s\n", on_poff_trigger.action->name);
2193}
2194
2195static ssize_t on_poff_store(struct kobject *kobj,
2196			     struct kobj_attribute *attr,
2197			     const char *buf, size_t len)
2198{
2199	return set_trigger(buf, &on_poff_trigger, len);
2200}
2201static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff);
 
 
 
2202
2203static void do_machine_power_off(void)
2204{
2205	smp_send_stop();
2206	on_poff_trigger.action->fn(&on_poff_trigger);
2207	stop_run(&on_poff_trigger);
2208}
2209void (*_machine_power_off)(void) = do_machine_power_off;
2210
2211static struct attribute *shutdown_action_attrs[] = {
2212	&on_restart_attr.attr,
2213	&on_reboot_attr.attr,
2214	&on_panic_attr.attr,
2215	&on_halt_attr.attr,
2216	&on_poff_attr.attr,
2217	NULL,
2218};
2219
2220static struct attribute_group shutdown_action_attr_group = {
2221	.attrs = shutdown_action_attrs,
2222};
2223
2224static void __init shutdown_triggers_init(void)
2225{
2226	shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
2227						    firmware_kobj);
2228	if (!shutdown_actions_kset)
2229		goto fail;
2230	if (sysfs_create_group(&shutdown_actions_kset->kobj,
2231			       &shutdown_action_attr_group))
 
 
 
 
 
 
 
 
 
 
 
 
2232		goto fail;
2233	return;
2234fail:
2235	panic("shutdown_triggers_init failed\n");
2236}
2237
2238static void __init shutdown_actions_init(void)
2239{
2240	int i;
2241
2242	for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
2243		if (!shutdown_actions_list[i]->init)
2244			continue;
2245		shutdown_actions_list[i]->init_rc =
2246			shutdown_actions_list[i]->init();
2247	}
2248}
2249
2250static int __init s390_ipl_init(void)
2251{
2252	char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40};
2253
2254	sclp_early_get_ipl_info(&sclp_ipl_info);
2255	/*
2256	 * Fix loadparm: There are systems where the (SCSI) LOADPARM
2257	 * returned by read SCP info is invalid (contains EBCDIC blanks)
2258	 * when the system has been booted via diag308. In that case we use
2259	 * the value from diag308, if available.
2260	 *
2261	 * There are also systems where diag308 store does not work in
2262	 * case the system is booted from HMC. Fortunately in this case
2263	 * READ SCP info provides the correct value.
2264	 */
2265	if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 && ipl_block_valid)
2266		memcpy(sclp_ipl_info.loadparm, ipl_block.ccw.loadparm, LOADPARM_LEN);
2267	shutdown_actions_init();
2268	shutdown_triggers_init();
2269	return 0;
2270}
2271
2272__initcall(s390_ipl_init);
2273
2274static void __init strncpy_skip_quote(char *dst, char *src, int n)
2275{
2276	int sx, dx;
2277
2278	dx = 0;
2279	for (sx = 0; src[sx] != 0; sx++) {
2280		if (src[sx] == '"')
2281			continue;
2282		dst[dx++] = src[sx];
2283		if (dx >= n)
2284			break;
2285	}
2286}
2287
2288static int __init vmcmd_on_reboot_setup(char *str)
2289{
2290	if (!MACHINE_IS_VM)
2291		return 1;
2292	strncpy_skip_quote(vmcmd_on_reboot, str, 127);
2293	vmcmd_on_reboot[127] = 0;
2294	on_reboot_trigger.action = &vmcmd_action;
2295	return 1;
2296}
2297__setup("vmreboot=", vmcmd_on_reboot_setup);
2298
2299static int __init vmcmd_on_panic_setup(char *str)
2300{
2301	if (!MACHINE_IS_VM)
2302		return 1;
2303	strncpy_skip_quote(vmcmd_on_panic, str, 127);
2304	vmcmd_on_panic[127] = 0;
2305	on_panic_trigger.action = &vmcmd_action;
2306	return 1;
2307}
2308__setup("vmpanic=", vmcmd_on_panic_setup);
2309
2310static int __init vmcmd_on_halt_setup(char *str)
2311{
2312	if (!MACHINE_IS_VM)
2313		return 1;
2314	strncpy_skip_quote(vmcmd_on_halt, str, 127);
2315	vmcmd_on_halt[127] = 0;
2316	on_halt_trigger.action = &vmcmd_action;
2317	return 1;
2318}
2319__setup("vmhalt=", vmcmd_on_halt_setup);
2320
2321static int __init vmcmd_on_poff_setup(char *str)
2322{
2323	if (!MACHINE_IS_VM)
2324		return 1;
2325	strncpy_skip_quote(vmcmd_on_poff, str, 127);
2326	vmcmd_on_poff[127] = 0;
2327	on_poff_trigger.action = &vmcmd_action;
2328	return 1;
2329}
2330__setup("vmpoff=", vmcmd_on_poff_setup);
2331
2332static int on_panic_notify(struct notifier_block *self,
2333			   unsigned long event, void *data)
2334{
2335	do_panic();
2336	return NOTIFY_OK;
2337}
2338
2339static struct notifier_block on_panic_nb = {
2340	.notifier_call = on_panic_notify,
2341	.priority = INT_MIN,
2342};
2343
2344void __init setup_ipl(void)
2345{
2346	BUILD_BUG_ON(sizeof(struct ipl_parameter_block) != PAGE_SIZE);
2347
2348	ipl_info.type = get_ipl_type();
2349	switch (ipl_info.type) {
2350	case IPL_TYPE_CCW:
2351		ipl_info.data.ccw.dev_id.ssid = ipl_block.ccw.ssid;
2352		ipl_info.data.ccw.dev_id.devno = ipl_block.ccw.devno;
2353		break;
2354	case IPL_TYPE_ECKD:
2355	case IPL_TYPE_ECKD_DUMP:
2356		ipl_info.data.eckd.dev_id.ssid = ipl_block.eckd.ssid;
2357		ipl_info.data.eckd.dev_id.devno = ipl_block.eckd.devno;
2358		break;
2359	case IPL_TYPE_FCP:
2360	case IPL_TYPE_FCP_DUMP:
 
 
2361		ipl_info.data.fcp.dev_id.ssid = 0;
2362		ipl_info.data.fcp.dev_id.devno = ipl_block.fcp.devno;
2363		ipl_info.data.fcp.wwpn = ipl_block.fcp.wwpn;
2364		ipl_info.data.fcp.lun = ipl_block.fcp.lun;
2365		break;
2366	case IPL_TYPE_NVME:
2367	case IPL_TYPE_NVME_DUMP:
2368		ipl_info.data.nvme.fid = ipl_block.nvme.fid;
2369		ipl_info.data.nvme.nsid = ipl_block.nvme.nsid;
2370		break;
2371	case IPL_TYPE_NSS:
 
 
 
2372	case IPL_TYPE_UNKNOWN:
2373		/* We have no info to copy */
2374		break;
2375	}
2376	atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
2377}
2378
2379void s390_reset_system(void)
2380{
2381	/* Disable prefixing */
2382	set_prefix(0);
2383
2384	/* Disable lowcore protection */
2385	local_ctl_clear_bit(0, CR0_LOW_ADDRESS_PROTECTION_BIT);
2386	diag_amode31_ops.diag308_reset();
2387}
2388
2389#ifdef CONFIG_KEXEC_FILE
2390
2391int ipl_report_add_component(struct ipl_report *report, struct kexec_buf *kbuf,
2392			     unsigned char flags, unsigned short cert)
2393{
2394	struct ipl_report_component *comp;
 
2395
2396	comp = vzalloc(sizeof(*comp));
2397	if (!comp)
2398		return -ENOMEM;
2399	list_add_tail(&comp->list, &report->components);
2400
2401	comp->entry.addr = kbuf->mem;
2402	comp->entry.len = kbuf->memsz;
2403	comp->entry.flags = flags;
2404	comp->entry.certificate_index = cert;
 
 
 
 
 
 
2405
2406	report->size += sizeof(comp->entry);
 
2407
2408	return 0;
 
 
 
 
2409}
 
2410
2411int ipl_report_add_certificate(struct ipl_report *report, void *key,
2412			       unsigned long addr, unsigned long len)
2413{
2414	struct ipl_report_certificate *cert;
2415
2416	cert = vzalloc(sizeof(*cert));
2417	if (!cert)
2418		return -ENOMEM;
2419	list_add_tail(&cert->list, &report->certificates);
2420
2421	cert->entry.addr = addr;
2422	cert->entry.len = len;
2423	cert->key = key;
2424
2425	report->size += sizeof(cert->entry);
2426	report->size += cert->entry.len;
2427
2428	return 0;
2429}
 
2430
2431struct ipl_report *ipl_report_init(struct ipl_parameter_block *ipib)
2432{
2433	struct ipl_report *report;
2434
2435	report = vzalloc(sizeof(*report));
2436	if (!report)
2437		return ERR_PTR(-ENOMEM);
2438
2439	report->ipib = ipib;
2440	INIT_LIST_HEAD(&report->components);
2441	INIT_LIST_HEAD(&report->certificates);
2442
2443	report->size = ALIGN(ipib->hdr.len, 8);
2444	report->size += sizeof(struct ipl_rl_hdr);
2445	report->size += sizeof(struct ipl_rb_components);
2446	report->size += sizeof(struct ipl_rb_certificates);
2447
2448	return report;
 
 
2449}
2450
2451void *ipl_report_finish(struct ipl_report *report)
 
 
2452{
2453	struct ipl_report_certificate *cert;
2454	struct ipl_report_component *comp;
2455	struct ipl_rb_certificates *certs;
2456	struct ipl_parameter_block *ipib;
2457	struct ipl_rb_components *comps;
2458	struct ipl_rl_hdr *rl_hdr;
2459	void *buf, *ptr;
2460
2461	buf = vzalloc(report->size);
2462	if (!buf)
2463		goto out;
2464	ptr = buf;
2465
2466	memcpy(ptr, report->ipib, report->ipib->hdr.len);
2467	ipib = ptr;
2468	if (ipl_secure_flag)
2469		ipib->hdr.flags |= IPL_PL_FLAG_SIPL;
2470	ipib->hdr.flags |= IPL_PL_FLAG_IPLSR;
2471	ptr += report->ipib->hdr.len;
2472	ptr = PTR_ALIGN(ptr, 8);
2473
2474	rl_hdr = ptr;
2475	ptr += sizeof(*rl_hdr);
2476
2477	comps = ptr;
2478	comps->rbt = IPL_RBT_COMPONENTS;
2479	ptr += sizeof(*comps);
2480	list_for_each_entry(comp, &report->components, list) {
2481		memcpy(ptr, &comp->entry, sizeof(comp->entry));
2482		ptr += sizeof(comp->entry);
2483	}
2484	comps->len = ptr - (void *)comps;
2485
2486	certs = ptr;
2487	certs->rbt = IPL_RBT_CERTIFICATES;
2488	ptr += sizeof(*certs);
2489	list_for_each_entry(cert, &report->certificates, list) {
2490		memcpy(ptr, &cert->entry, sizeof(cert->entry));
2491		ptr += sizeof(cert->entry);
2492	}
2493	certs->len = ptr - (void *)certs;
2494	rl_hdr->len = ptr - (void *)rl_hdr;
2495
2496	list_for_each_entry(cert, &report->certificates, list) {
2497		memcpy(ptr, cert->key, cert->entry.len);
2498		ptr += cert->entry.len;
2499	}
2500
2501	BUG_ON(ptr > buf + report->size);
2502out:
2503	return buf;
2504}
2505
2506int ipl_report_free(struct ipl_report *report)
2507{
2508	struct ipl_report_component *comp, *ncomp;
2509	struct ipl_report_certificate *cert, *ncert;
2510
2511	list_for_each_entry_safe(comp, ncomp, &report->components, list)
2512		vfree(comp);
2513
2514	list_for_each_entry_safe(cert, ncert, &report->certificates, list)
2515		vfree(cert);
2516
2517	vfree(report);
 
 
 
 
 
 
 
 
2518
2519	return 0;
2520}
2521
2522#endif