1 // SPDX-License-Identifier: GPL-2.0
3 * ipl/reipl/dump support for Linux on s390.
5 * Copyright IBM Corp. 2005, 2012
6 * Author(s): Michael Holzheu <holzheu@de.ibm.com>
7 * Heiko Carstens <heiko.carstens@de.ibm.com>
8 * Volker Sameske <sameske@de.ibm.com>
11 #include <linux/types.h>
12 #include <linux/export.h>
13 #include <linux/init.h>
14 #include <linux/device.h>
15 #include <linux/delay.h>
16 #include <linux/reboot.h>
17 #include <linux/ctype.h>
19 #include <linux/gfp.h>
20 #include <linux/crash_dump.h>
21 #include <linux/debug_locks.h>
25 #include <asm/setup.h>
26 #include <asm/cpcmd.h>
27 #include <asm/ebcdic.h>
29 #include <asm/checksum.h>
30 #include <asm/debug.h>
31 #include <asm/os_info.h>
34 #define IPL_PARM_BLOCK_VERSION 0
36 #define IPL_UNKNOWN_STR "unknown"
37 #define IPL_CCW_STR "ccw"
38 #define IPL_FCP_STR "fcp"
39 #define IPL_FCP_DUMP_STR "fcp_dump"
40 #define IPL_NSS_STR "nss"
42 #define DUMP_CCW_STR "ccw"
43 #define DUMP_FCP_STR "fcp"
44 #define DUMP_NONE_STR "none"
47 * Four shutdown trigger types are supported:
54 #define ON_PANIC_STR "on_panic"
55 #define ON_HALT_STR "on_halt"
56 #define ON_POFF_STR "on_poff"
57 #define ON_REIPL_STR "on_reboot"
58 #define ON_RESTART_STR "on_restart"
60 struct shutdown_action;
61 struct shutdown_trigger {
63 struct shutdown_action *action;
67 * The following shutdown action types are supported:
69 #define SHUTDOWN_ACTION_IPL_STR "ipl"
70 #define SHUTDOWN_ACTION_REIPL_STR "reipl"
71 #define SHUTDOWN_ACTION_DUMP_STR "dump"
72 #define SHUTDOWN_ACTION_VMCMD_STR "vmcmd"
73 #define SHUTDOWN_ACTION_STOP_STR "stop"
74 #define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl"
76 struct shutdown_action {
78 void (*fn) (struct shutdown_trigger *trigger);
83 static char *ipl_type_str(enum ipl_type type)
90 case IPL_TYPE_FCP_DUMP:
91 return IPL_FCP_DUMP_STR;
94 case IPL_TYPE_UNKNOWN:
96 return IPL_UNKNOWN_STR;
106 static char *dump_type_str(enum dump_type type)
110 return DUMP_NONE_STR;
120 static int ipl_block_valid;
121 static struct ipl_parameter_block ipl_block;
123 static int reipl_capabilities = IPL_TYPE_UNKNOWN;
125 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
126 static struct ipl_parameter_block *reipl_block_fcp;
127 static struct ipl_parameter_block *reipl_block_ccw;
128 static struct ipl_parameter_block *reipl_block_nss;
129 static struct ipl_parameter_block *reipl_block_actual;
131 static int dump_capabilities = DUMP_TYPE_NONE;
132 static enum dump_type dump_type = DUMP_TYPE_NONE;
133 static struct ipl_parameter_block *dump_block_fcp;
134 static struct ipl_parameter_block *dump_block_ccw;
136 static struct sclp_ipl_info sclp_ipl_info;
138 static inline int __diag308(unsigned long subcode, void *addr)
140 register unsigned long _addr asm("0") = (unsigned long) addr;
141 register unsigned long _rc asm("1") = 0;
144 " diag %0,%2,0x308\n"
147 : "+d" (_addr), "+d" (_rc)
148 : "d" (subcode) : "cc", "memory");
152 int diag308(unsigned long subcode, void *addr)
154 diag_stat_inc(DIAG_STAT_X308);
155 return __diag308(subcode, addr);
157 EXPORT_SYMBOL_GPL(diag308);
161 #define IPL_ATTR_SHOW_FN(_prefix, _name, _format, args...) \
162 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
163 struct kobj_attribute *attr, \
166 return snprintf(page, PAGE_SIZE, _format, ##args); \
169 #define IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk) \
170 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
171 struct kobj_attribute *attr, \
172 const char *buf, size_t len) \
174 unsigned long long ssid, devno; \
176 if (sscanf(buf, "0.%llx.%llx\n", &ssid, &devno) != 2) \
179 if (ssid > __MAX_SSID || devno > __MAX_SUBCHANNEL) \
182 _ipl_blk.ssid = ssid; \
183 _ipl_blk.devno = devno; \
187 #define DEFINE_IPL_CCW_ATTR_RW(_prefix, _name, _ipl_blk) \
188 IPL_ATTR_SHOW_FN(_prefix, _name, "0.%x.%04x\n", \
189 _ipl_blk.ssid, _ipl_blk.devno); \
190 IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk); \
191 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
192 __ATTR(_name, (S_IRUGO | S_IWUSR), \
193 sys_##_prefix##_##_name##_show, \
194 sys_##_prefix##_##_name##_store) \
196 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
197 IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value) \
198 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
199 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL)
201 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
202 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value) \
203 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
204 struct kobj_attribute *attr, \
205 const char *buf, size_t len) \
207 unsigned long long value; \
208 if (sscanf(buf, _fmt_in, &value) != 1) \
213 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
214 __ATTR(_name,(S_IRUGO | S_IWUSR), \
215 sys_##_prefix##_##_name##_show, \
216 sys_##_prefix##_##_name##_store)
218 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
219 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, _value) \
220 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
221 struct kobj_attribute *attr, \
222 const char *buf, size_t len) \
224 strncpy(_value, buf, sizeof(_value) - 1); \
228 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
229 __ATTR(_name,(S_IRUGO | S_IWUSR), \
230 sys_##_prefix##_##_name##_show, \
231 sys_##_prefix##_##_name##_store)
237 static __init enum ipl_type get_ipl_type(void)
239 if (!ipl_block_valid)
240 return IPL_TYPE_UNKNOWN;
242 switch (ipl_block.hdr.pbt) {
243 case DIAG308_IPL_TYPE_CCW:
245 case DIAG308_IPL_TYPE_FCP:
246 if (ipl_block.ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
247 return IPL_TYPE_FCP_DUMP;
251 return IPL_TYPE_UNKNOWN;
254 struct ipl_info ipl_info;
255 EXPORT_SYMBOL_GPL(ipl_info);
257 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
260 return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
263 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
265 /* VM IPL PARM routines */
266 static size_t reipl_get_ascii_vmparm(char *dest, size_t size,
267 const struct ipl_parameter_block *ipb)
271 char has_lowercase = 0;
274 if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
275 (ipb->ipl_info.ccw.vm_parm_len > 0)) {
277 len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
278 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
279 /* If at least one character is lowercase, we assume mixed
280 * case; otherwise we convert everything to lowercase.
282 for (i = 0; i < len; i++)
283 if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
284 (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
285 (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
290 EBC_TOLOWER(dest, len);
298 size_t append_ipl_vmparm(char *dest, size_t size)
303 if (ipl_block_valid && ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW)
304 rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
310 static ssize_t ipl_vm_parm_show(struct kobject *kobj,
311 struct kobj_attribute *attr, char *page)
313 char parm[DIAG308_VMPARM_SIZE + 1] = {};
315 append_ipl_vmparm(parm, sizeof(parm));
316 return sprintf(page, "%s\n", parm);
319 static size_t scpdata_length(const char* buf, size_t count)
322 if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
329 static size_t reipl_append_ascii_scpdata(char *dest, size_t size,
330 const struct ipl_parameter_block *ipb)
336 count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data,
337 ipb->ipl_info.fcp.scp_data_len));
342 for (i = 0; i < count; i++) {
343 if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
347 if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
352 memcpy(dest, ipb->ipl_info.fcp.scp_data, count);
354 for (i = 0; i < count; i++)
355 dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]);
361 size_t append_ipl_scpdata(char *dest, size_t len)
366 if (ipl_block_valid && ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP)
367 rc = reipl_append_ascii_scpdata(dest, len, &ipl_block);
374 static struct kobj_attribute sys_ipl_vm_parm_attr =
375 __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
377 static ssize_t sys_ipl_device_show(struct kobject *kobj,
378 struct kobj_attribute *attr, char *page)
380 switch (ipl_info.type) {
382 return sprintf(page, "0.%x.%04x\n", ipl_block.ipl_info.ccw.ssid,
383 ipl_block.ipl_info.ccw.devno);
385 case IPL_TYPE_FCP_DUMP:
386 return sprintf(page, "0.0.%04x\n",
387 ipl_block.ipl_info.fcp.devno);
393 static struct kobj_attribute sys_ipl_device_attr =
394 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
396 static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
397 struct bin_attribute *attr, char *buf,
398 loff_t off, size_t count)
400 return memory_read_from_buffer(buf, count, &off, &ipl_block,
403 static struct bin_attribute ipl_parameter_attr =
404 __BIN_ATTR(binary_parameter, S_IRUGO, ipl_parameter_read, NULL,
407 static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
408 struct bin_attribute *attr, char *buf,
409 loff_t off, size_t count)
411 unsigned int size = ipl_block.ipl_info.fcp.scp_data_len;
412 void *scp_data = &ipl_block.ipl_info.fcp.scp_data;
414 return memory_read_from_buffer(buf, count, &off, scp_data, size);
416 static struct bin_attribute ipl_scp_data_attr =
417 __BIN_ATTR(scp_data, S_IRUGO, ipl_scp_data_read, NULL, PAGE_SIZE);
419 static struct bin_attribute *ipl_fcp_bin_attrs[] = {
425 /* FCP ipl device attributes */
427 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n",
428 (unsigned long long)ipl_block.ipl_info.fcp.wwpn);
429 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n",
430 (unsigned long long)ipl_block.ipl_info.fcp.lun);
431 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n",
432 (unsigned long long)ipl_block.ipl_info.fcp.bootprog);
433 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n",
434 (unsigned long long)ipl_block.ipl_info.fcp.br_lba);
436 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
437 struct kobj_attribute *attr, char *page)
439 char loadparm[LOADPARM_LEN + 1] = {};
441 if (!sclp_ipl_info.is_valid)
442 return sprintf(page, "#unknown#\n");
443 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
444 EBCASC(loadparm, LOADPARM_LEN);
446 return sprintf(page, "%s\n", loadparm);
449 static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
450 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
452 static struct attribute *ipl_fcp_attrs[] = {
453 &sys_ipl_type_attr.attr,
454 &sys_ipl_device_attr.attr,
455 &sys_ipl_fcp_wwpn_attr.attr,
456 &sys_ipl_fcp_lun_attr.attr,
457 &sys_ipl_fcp_bootprog_attr.attr,
458 &sys_ipl_fcp_br_lba_attr.attr,
459 &sys_ipl_ccw_loadparm_attr.attr,
463 static struct attribute_group ipl_fcp_attr_group = {
464 .attrs = ipl_fcp_attrs,
465 .bin_attrs = ipl_fcp_bin_attrs,
468 /* CCW ipl device attributes */
470 static struct attribute *ipl_ccw_attrs_vm[] = {
471 &sys_ipl_type_attr.attr,
472 &sys_ipl_device_attr.attr,
473 &sys_ipl_ccw_loadparm_attr.attr,
474 &sys_ipl_vm_parm_attr.attr,
478 static struct attribute *ipl_ccw_attrs_lpar[] = {
479 &sys_ipl_type_attr.attr,
480 &sys_ipl_device_attr.attr,
481 &sys_ipl_ccw_loadparm_attr.attr,
485 static struct attribute_group ipl_ccw_attr_group_vm = {
486 .attrs = ipl_ccw_attrs_vm,
489 static struct attribute_group ipl_ccw_attr_group_lpar = {
490 .attrs = ipl_ccw_attrs_lpar
493 /* UNKNOWN ipl device attributes */
495 static struct attribute *ipl_unknown_attrs[] = {
496 &sys_ipl_type_attr.attr,
500 static struct attribute_group ipl_unknown_attr_group = {
501 .attrs = ipl_unknown_attrs,
504 static struct kset *ipl_kset;
506 static void __ipl_run(void *unused)
509 diag308(DIAG308_LOAD_CLEAR, NULL);
512 static void ipl_run(struct shutdown_trigger *trigger)
514 smp_call_ipl_cpu(__ipl_run, NULL);
517 static int __init ipl_init(void)
521 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
526 switch (ipl_info.type) {
529 rc = sysfs_create_group(&ipl_kset->kobj,
530 &ipl_ccw_attr_group_vm);
532 rc = sysfs_create_group(&ipl_kset->kobj,
533 &ipl_ccw_attr_group_lpar);
536 case IPL_TYPE_FCP_DUMP:
537 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
540 rc = sysfs_create_group(&ipl_kset->kobj,
541 &ipl_unknown_attr_group);
546 panic("ipl_init failed: rc = %i\n", rc);
551 static struct shutdown_action __refdata ipl_action = {
552 .name = SHUTDOWN_ACTION_IPL_STR,
558 * reipl shutdown action: Reboot Linux on shutdown.
561 /* VM IPL PARM attributes */
562 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
565 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
567 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
568 return sprintf(page, "%s\n", vmparm);
571 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
573 const char *buf, size_t len)
577 /* ignore trailing newline */
579 if ((len > 0) && (buf[len - 1] == '\n'))
582 if (ip_len > vmparm_max)
585 /* parm is used to store kernel options, check for common chars */
586 for (i = 0; i < ip_len; i++)
587 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
590 memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
591 ipb->ipl_info.ccw.vm_parm_len = ip_len;
593 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
594 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
595 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
597 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
604 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
605 struct kobj_attribute *attr, char *page)
607 return reipl_generic_vmparm_show(reipl_block_nss, page);
610 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
611 struct kobj_attribute *attr,
612 const char *buf, size_t len)
614 return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
618 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
619 struct kobj_attribute *attr, char *page)
621 return reipl_generic_vmparm_show(reipl_block_ccw, page);
624 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
625 struct kobj_attribute *attr,
626 const char *buf, size_t len)
628 return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
631 static struct kobj_attribute sys_reipl_nss_vmparm_attr =
632 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
633 reipl_nss_vmparm_store);
634 static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
635 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
636 reipl_ccw_vmparm_store);
638 /* FCP reipl device attributes */
640 static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
641 struct bin_attribute *attr,
642 char *buf, loff_t off, size_t count)
644 size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
645 void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
647 return memory_read_from_buffer(buf, count, &off, scp_data, size);
650 static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
651 struct bin_attribute *attr,
652 char *buf, loff_t off, size_t count)
654 size_t scpdata_len = count;
661 memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf, count);
662 if (scpdata_len % 8) {
663 padding = 8 - (scpdata_len % 8);
664 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
666 scpdata_len += padding;
669 reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
670 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
671 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
675 static struct bin_attribute sys_reipl_fcp_scp_data_attr =
676 __BIN_ATTR(scp_data, (S_IRUGO | S_IWUSR), reipl_fcp_scpdata_read,
677 reipl_fcp_scpdata_write, DIAG308_SCPDATA_SIZE);
679 static struct bin_attribute *reipl_fcp_bin_attrs[] = {
680 &sys_reipl_fcp_scp_data_attr,
684 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n",
685 reipl_block_fcp->ipl_info.fcp.wwpn);
686 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n",
687 reipl_block_fcp->ipl_info.fcp.lun);
688 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
689 reipl_block_fcp->ipl_info.fcp.bootprog);
690 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
691 reipl_block_fcp->ipl_info.fcp.br_lba);
692 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
693 reipl_block_fcp->ipl_info.fcp.devno);
695 static void reipl_get_ascii_loadparm(char *loadparm,
696 struct ipl_parameter_block *ibp)
698 memcpy(loadparm, ibp->hdr.loadparm, LOADPARM_LEN);
699 EBCASC(loadparm, LOADPARM_LEN);
700 loadparm[LOADPARM_LEN] = 0;
704 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
707 char buf[LOADPARM_LEN + 1];
709 reipl_get_ascii_loadparm(buf, ipb);
710 return sprintf(page, "%s\n", buf);
713 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
714 const char *buf, size_t len)
718 /* ignore trailing newline */
720 if ((len > 0) && (buf[len - 1] == '\n'))
722 /* loadparm can have max 8 characters and must not start with a blank */
723 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
725 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
726 for (i = 0; i < lp_len; i++) {
727 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
732 /* initialize loadparm with blanks */
733 memset(ipb->hdr.loadparm, ' ', LOADPARM_LEN);
734 /* copy and convert to ebcdic */
735 memcpy(ipb->hdr.loadparm, buf, lp_len);
736 ASCEBC(ipb->hdr.loadparm, LOADPARM_LEN);
737 ipb->hdr.flags |= DIAG308_FLAGS_LP_VALID;
742 static ssize_t reipl_fcp_loadparm_show(struct kobject *kobj,
743 struct kobj_attribute *attr, char *page)
745 return reipl_generic_loadparm_show(reipl_block_fcp, page);
748 static ssize_t reipl_fcp_loadparm_store(struct kobject *kobj,
749 struct kobj_attribute *attr,
750 const char *buf, size_t len)
752 return reipl_generic_loadparm_store(reipl_block_fcp, buf, len);
755 static struct kobj_attribute sys_reipl_fcp_loadparm_attr =
756 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_fcp_loadparm_show,
757 reipl_fcp_loadparm_store);
759 static struct attribute *reipl_fcp_attrs[] = {
760 &sys_reipl_fcp_device_attr.attr,
761 &sys_reipl_fcp_wwpn_attr.attr,
762 &sys_reipl_fcp_lun_attr.attr,
763 &sys_reipl_fcp_bootprog_attr.attr,
764 &sys_reipl_fcp_br_lba_attr.attr,
765 &sys_reipl_fcp_loadparm_attr.attr,
769 static struct attribute_group reipl_fcp_attr_group = {
770 .attrs = reipl_fcp_attrs,
771 .bin_attrs = reipl_fcp_bin_attrs,
774 /* CCW reipl device attributes */
775 DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ipl_info.ccw);
778 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
779 struct kobj_attribute *attr, char *page)
781 return reipl_generic_loadparm_show(reipl_block_nss, page);
784 static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
785 struct kobj_attribute *attr,
786 const char *buf, size_t len)
788 return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
792 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
793 struct kobj_attribute *attr, char *page)
795 return reipl_generic_loadparm_show(reipl_block_ccw, page);
798 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
799 struct kobj_attribute *attr,
800 const char *buf, size_t len)
802 return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
805 static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
806 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
807 reipl_ccw_loadparm_store);
809 static struct attribute *reipl_ccw_attrs_vm[] = {
810 &sys_reipl_ccw_device_attr.attr,
811 &sys_reipl_ccw_loadparm_attr.attr,
812 &sys_reipl_ccw_vmparm_attr.attr,
816 static struct attribute *reipl_ccw_attrs_lpar[] = {
817 &sys_reipl_ccw_device_attr.attr,
818 &sys_reipl_ccw_loadparm_attr.attr,
822 static struct attribute_group reipl_ccw_attr_group_vm = {
824 .attrs = reipl_ccw_attrs_vm,
827 static struct attribute_group reipl_ccw_attr_group_lpar = {
829 .attrs = reipl_ccw_attrs_lpar,
833 /* NSS reipl device attributes */
834 static void reipl_get_ascii_nss_name(char *dst,
835 struct ipl_parameter_block *ipb)
837 memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
838 EBCASC(dst, NSS_NAME_SIZE);
839 dst[NSS_NAME_SIZE] = 0;
842 static ssize_t reipl_nss_name_show(struct kobject *kobj,
843 struct kobj_attribute *attr, char *page)
845 char nss_name[NSS_NAME_SIZE + 1] = {};
847 reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
848 return sprintf(page, "%s\n", nss_name);
851 static ssize_t reipl_nss_name_store(struct kobject *kobj,
852 struct kobj_attribute *attr,
853 const char *buf, size_t len)
857 /* ignore trailing newline */
859 if ((len > 0) && (buf[len - 1] == '\n'))
862 if (nss_len > NSS_NAME_SIZE)
865 memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
867 reipl_block_nss->ipl_info.ccw.vm_flags |=
868 DIAG308_VM_FLAGS_NSS_VALID;
869 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
870 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
871 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
873 reipl_block_nss->ipl_info.ccw.vm_flags &=
874 ~DIAG308_VM_FLAGS_NSS_VALID;
880 static struct kobj_attribute sys_reipl_nss_name_attr =
881 __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
882 reipl_nss_name_store);
884 static struct kobj_attribute sys_reipl_nss_loadparm_attr =
885 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
886 reipl_nss_loadparm_store);
888 static struct attribute *reipl_nss_attrs[] = {
889 &sys_reipl_nss_name_attr.attr,
890 &sys_reipl_nss_loadparm_attr.attr,
891 &sys_reipl_nss_vmparm_attr.attr,
895 static struct attribute_group reipl_nss_attr_group = {
897 .attrs = reipl_nss_attrs,
900 void set_os_info_reipl_block(void)
902 os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual,
903 reipl_block_actual->hdr.len);
908 static int reipl_set_type(enum ipl_type type)
910 if (!(reipl_capabilities & type))
915 reipl_block_actual = reipl_block_ccw;
918 reipl_block_actual = reipl_block_fcp;
921 reipl_block_actual = reipl_block_nss;
930 static ssize_t reipl_type_show(struct kobject *kobj,
931 struct kobj_attribute *attr, char *page)
933 return sprintf(page, "%s\n", ipl_type_str(reipl_type));
936 static ssize_t reipl_type_store(struct kobject *kobj,
937 struct kobj_attribute *attr,
938 const char *buf, size_t len)
942 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
943 rc = reipl_set_type(IPL_TYPE_CCW);
944 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
945 rc = reipl_set_type(IPL_TYPE_FCP);
946 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
947 rc = reipl_set_type(IPL_TYPE_NSS);
948 return (rc != 0) ? rc : len;
951 static struct kobj_attribute reipl_type_attr =
952 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
954 static struct kset *reipl_kset;
955 static struct kset *reipl_fcp_kset;
957 static void __reipl_run(void *unused)
959 switch (reipl_type) {
961 diag308(DIAG308_SET, reipl_block_ccw);
962 diag308(DIAG308_LOAD_CLEAR, NULL);
965 diag308(DIAG308_SET, reipl_block_fcp);
966 diag308(DIAG308_LOAD_CLEAR, NULL);
969 diag308(DIAG308_SET, reipl_block_nss);
970 diag308(DIAG308_LOAD_CLEAR, NULL);
972 case IPL_TYPE_UNKNOWN:
973 diag308(DIAG308_LOAD_CLEAR, NULL);
975 case IPL_TYPE_FCP_DUMP:
978 disabled_wait((unsigned long) __builtin_return_address(0));
981 static void reipl_run(struct shutdown_trigger *trigger)
983 smp_call_ipl_cpu(__reipl_run, NULL);
986 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
988 ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
989 ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
990 ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
991 ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
994 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
997 /* check if read scp info worked and set loadparm */
998 if (sclp_ipl_info.is_valid)
999 memcpy(ipb->hdr.loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
1001 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1002 memset(ipb->hdr.loadparm, 0x40, LOADPARM_LEN);
1003 ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
1006 if (MACHINE_IS_VM && ipl_block_valid &&
1007 (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1009 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1010 ipb->ipl_info.ccw.vm_parm_len =
1011 ipl_block.ipl_info.ccw.vm_parm_len;
1012 memcpy(ipb->ipl_info.ccw.vm_parm,
1013 ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1017 static int __init reipl_nss_init(void)
1024 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1025 if (!reipl_block_nss)
1028 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1032 reipl_block_ccw_init(reipl_block_nss);
1033 reipl_capabilities |= IPL_TYPE_NSS;
1037 static int __init reipl_ccw_init(void)
1041 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1042 if (!reipl_block_ccw)
1045 rc = sysfs_create_group(&reipl_kset->kobj,
1046 MACHINE_IS_VM ? &reipl_ccw_attr_group_vm
1047 : &reipl_ccw_attr_group_lpar);
1051 reipl_block_ccw_init(reipl_block_ccw);
1052 if (ipl_info.type == IPL_TYPE_CCW) {
1053 reipl_block_ccw->ipl_info.ccw.ssid = ipl_block.ipl_info.ccw.ssid;
1054 reipl_block_ccw->ipl_info.ccw.devno = ipl_block.ipl_info.ccw.devno;
1055 reipl_block_ccw_fill_parms(reipl_block_ccw);
1058 reipl_capabilities |= IPL_TYPE_CCW;
1062 static int __init reipl_fcp_init(void)
1066 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1067 if (!reipl_block_fcp)
1070 /* sysfs: create fcp kset for mixing attr group and bin attrs */
1071 reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1073 if (!reipl_fcp_kset) {
1074 free_page((unsigned long) reipl_block_fcp);
1078 rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1080 kset_unregister(reipl_fcp_kset);
1081 free_page((unsigned long) reipl_block_fcp);
1085 if (ipl_info.type == IPL_TYPE_FCP) {
1086 memcpy(reipl_block_fcp, &ipl_block, sizeof(ipl_block));
1088 * Fix loadparm: There are systems where the (SCSI) LOADPARM
1089 * is invalid in the SCSI IPL parameter block, so take it
1090 * always from sclp_ipl_info.
1092 memcpy(reipl_block_fcp->hdr.loadparm, sclp_ipl_info.loadparm,
1095 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1096 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1097 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1098 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1099 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1101 reipl_capabilities |= IPL_TYPE_FCP;
1105 static int __init reipl_type_init(void)
1107 enum ipl_type reipl_type = ipl_info.type;
1108 struct ipl_parameter_block *reipl_block;
1111 reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size);
1115 * If we have an OS info reipl block, this will be used
1117 if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_FCP) {
1118 memcpy(reipl_block_fcp, reipl_block, size);
1119 reipl_type = IPL_TYPE_FCP;
1120 } else if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_CCW) {
1121 memcpy(reipl_block_ccw, reipl_block, size);
1122 reipl_type = IPL_TYPE_CCW;
1125 return reipl_set_type(reipl_type);
1128 static int __init reipl_init(void)
1132 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1135 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1137 kset_unregister(reipl_kset);
1140 rc = reipl_ccw_init();
1143 rc = reipl_fcp_init();
1146 rc = reipl_nss_init();
1149 return reipl_type_init();
1152 static struct shutdown_action __refdata reipl_action = {
1153 .name = SHUTDOWN_ACTION_REIPL_STR,
1159 * dump shutdown action: Dump Linux on shutdown.
1162 /* FCP dump device attributes */
1164 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n",
1165 dump_block_fcp->ipl_info.fcp.wwpn);
1166 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n",
1167 dump_block_fcp->ipl_info.fcp.lun);
1168 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1169 dump_block_fcp->ipl_info.fcp.bootprog);
1170 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1171 dump_block_fcp->ipl_info.fcp.br_lba);
1172 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1173 dump_block_fcp->ipl_info.fcp.devno);
1175 static struct attribute *dump_fcp_attrs[] = {
1176 &sys_dump_fcp_device_attr.attr,
1177 &sys_dump_fcp_wwpn_attr.attr,
1178 &sys_dump_fcp_lun_attr.attr,
1179 &sys_dump_fcp_bootprog_attr.attr,
1180 &sys_dump_fcp_br_lba_attr.attr,
1184 static struct attribute_group dump_fcp_attr_group = {
1185 .name = IPL_FCP_STR,
1186 .attrs = dump_fcp_attrs,
1189 /* CCW dump device attributes */
1190 DEFINE_IPL_CCW_ATTR_RW(dump_ccw, device, dump_block_ccw->ipl_info.ccw);
1192 static struct attribute *dump_ccw_attrs[] = {
1193 &sys_dump_ccw_device_attr.attr,
1197 static struct attribute_group dump_ccw_attr_group = {
1198 .name = IPL_CCW_STR,
1199 .attrs = dump_ccw_attrs,
1204 static int dump_set_type(enum dump_type type)
1206 if (!(dump_capabilities & type))
1212 static ssize_t dump_type_show(struct kobject *kobj,
1213 struct kobj_attribute *attr, char *page)
1215 return sprintf(page, "%s\n", dump_type_str(dump_type));
1218 static ssize_t dump_type_store(struct kobject *kobj,
1219 struct kobj_attribute *attr,
1220 const char *buf, size_t len)
1224 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1225 rc = dump_set_type(DUMP_TYPE_NONE);
1226 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1227 rc = dump_set_type(DUMP_TYPE_CCW);
1228 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1229 rc = dump_set_type(DUMP_TYPE_FCP);
1230 return (rc != 0) ? rc : len;
1233 static struct kobj_attribute dump_type_attr =
1234 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1236 static struct kset *dump_kset;
1238 static void diag308_dump(void *dump_block)
1240 diag308(DIAG308_SET, dump_block);
1242 if (diag308(DIAG308_LOAD_NORMAL_DUMP, NULL) != 0x302)
1244 udelay_simple(USEC_PER_SEC);
1248 static void __dump_run(void *unused)
1250 switch (dump_type) {
1252 diag308_dump(dump_block_ccw);
1255 diag308_dump(dump_block_fcp);
1262 static void dump_run(struct shutdown_trigger *trigger)
1264 if (dump_type == DUMP_TYPE_NONE)
1267 smp_call_ipl_cpu(__dump_run, NULL);
1270 static int __init dump_ccw_init(void)
1274 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1275 if (!dump_block_ccw)
1277 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1279 free_page((unsigned long)dump_block_ccw);
1282 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1283 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1284 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1285 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1286 dump_capabilities |= DUMP_TYPE_CCW;
1290 static int __init dump_fcp_init(void)
1294 if (!sclp_ipl_info.has_dump)
1295 return 0; /* LDIPL DUMP is not installed */
1296 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1297 if (!dump_block_fcp)
1299 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1301 free_page((unsigned long)dump_block_fcp);
1304 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1305 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1306 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1307 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1308 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1309 dump_capabilities |= DUMP_TYPE_FCP;
1313 static int __init dump_init(void)
1317 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1320 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1322 kset_unregister(dump_kset);
1325 rc = dump_ccw_init();
1328 rc = dump_fcp_init();
1331 dump_set_type(DUMP_TYPE_NONE);
1335 static struct shutdown_action __refdata dump_action = {
1336 .name = SHUTDOWN_ACTION_DUMP_STR,
1341 static void dump_reipl_run(struct shutdown_trigger *trigger)
1343 unsigned long ipib = (unsigned long) reipl_block_actual;
1346 csum = (__force unsigned int)
1347 csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
1348 mem_assign_absolute(S390_lowcore.ipib, ipib);
1349 mem_assign_absolute(S390_lowcore.ipib_checksum, csum);
1353 static struct shutdown_action __refdata dump_reipl_action = {
1354 .name = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1355 .fn = dump_reipl_run,
1359 * vmcmd shutdown action: Trigger vm command on shutdown.
1362 static char vmcmd_on_reboot[128];
1363 static char vmcmd_on_panic[128];
1364 static char vmcmd_on_halt[128];
1365 static char vmcmd_on_poff[128];
1366 static char vmcmd_on_restart[128];
1368 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1369 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1370 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1371 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1372 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1374 static struct attribute *vmcmd_attrs[] = {
1375 &sys_vmcmd_on_reboot_attr.attr,
1376 &sys_vmcmd_on_panic_attr.attr,
1377 &sys_vmcmd_on_halt_attr.attr,
1378 &sys_vmcmd_on_poff_attr.attr,
1379 &sys_vmcmd_on_restart_attr.attr,
1383 static struct attribute_group vmcmd_attr_group = {
1384 .attrs = vmcmd_attrs,
1387 static struct kset *vmcmd_kset;
1389 static void vmcmd_run(struct shutdown_trigger *trigger)
1393 if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1394 cmd = vmcmd_on_reboot;
1395 else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1396 cmd = vmcmd_on_panic;
1397 else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1398 cmd = vmcmd_on_halt;
1399 else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1400 cmd = vmcmd_on_poff;
1401 else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
1402 cmd = vmcmd_on_restart;
1406 if (strlen(cmd) == 0)
1408 __cpcmd(cmd, NULL, 0, NULL);
1411 static int vmcmd_init(void)
1415 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1418 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1421 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1422 vmcmd_run, vmcmd_init};
1425 * stop shutdown action: Stop Linux on shutdown.
1428 static void stop_run(struct shutdown_trigger *trigger)
1430 if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
1431 strcmp(trigger->name, ON_RESTART_STR) == 0)
1432 disabled_wait((unsigned long) __builtin_return_address(0));
1436 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1441 static struct shutdown_action *shutdown_actions_list[] = {
1442 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1443 &vmcmd_action, &stop_action};
1444 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1450 static struct kset *shutdown_actions_kset;
1452 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1457 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1458 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1459 if (shutdown_actions_list[i]->init_rc) {
1460 return shutdown_actions_list[i]->init_rc;
1462 trigger->action = shutdown_actions_list[i];
1472 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1475 static ssize_t on_reboot_show(struct kobject *kobj,
1476 struct kobj_attribute *attr, char *page)
1478 return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1481 static ssize_t on_reboot_store(struct kobject *kobj,
1482 struct kobj_attribute *attr,
1483 const char *buf, size_t len)
1485 return set_trigger(buf, &on_reboot_trigger, len);
1487 static struct kobj_attribute on_reboot_attr = __ATTR_RW(on_reboot);
1489 static void do_machine_restart(char *__unused)
1492 on_reboot_trigger.action->fn(&on_reboot_trigger);
1495 void (*_machine_restart)(char *command) = do_machine_restart;
1499 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1501 static ssize_t on_panic_show(struct kobject *kobj,
1502 struct kobj_attribute *attr, char *page)
1504 return sprintf(page, "%s\n", on_panic_trigger.action->name);
1507 static ssize_t on_panic_store(struct kobject *kobj,
1508 struct kobj_attribute *attr,
1509 const char *buf, size_t len)
1511 return set_trigger(buf, &on_panic_trigger, len);
1513 static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic);
1515 static void do_panic(void)
1518 on_panic_trigger.action->fn(&on_panic_trigger);
1519 stop_run(&on_panic_trigger);
1524 static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
1527 static ssize_t on_restart_show(struct kobject *kobj,
1528 struct kobj_attribute *attr, char *page)
1530 return sprintf(page, "%s\n", on_restart_trigger.action->name);
1533 static ssize_t on_restart_store(struct kobject *kobj,
1534 struct kobj_attribute *attr,
1535 const char *buf, size_t len)
1537 return set_trigger(buf, &on_restart_trigger, len);
1539 static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart);
1541 static void __do_restart(void *ignore)
1543 __arch_local_irq_stosm(0x04); /* enable DAT */
1545 #ifdef CONFIG_CRASH_DUMP
1548 on_restart_trigger.action->fn(&on_restart_trigger);
1549 stop_run(&on_restart_trigger);
1552 void do_restart(void)
1557 smp_call_online_cpu(__do_restart, NULL);
1562 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1564 static ssize_t on_halt_show(struct kobject *kobj,
1565 struct kobj_attribute *attr, char *page)
1567 return sprintf(page, "%s\n", on_halt_trigger.action->name);
1570 static ssize_t on_halt_store(struct kobject *kobj,
1571 struct kobj_attribute *attr,
1572 const char *buf, size_t len)
1574 return set_trigger(buf, &on_halt_trigger, len);
1576 static struct kobj_attribute on_halt_attr = __ATTR_RW(on_halt);
1578 static void do_machine_halt(void)
1581 on_halt_trigger.action->fn(&on_halt_trigger);
1582 stop_run(&on_halt_trigger);
1584 void (*_machine_halt)(void) = do_machine_halt;
1588 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1590 static ssize_t on_poff_show(struct kobject *kobj,
1591 struct kobj_attribute *attr, char *page)
1593 return sprintf(page, "%s\n", on_poff_trigger.action->name);
1596 static ssize_t on_poff_store(struct kobject *kobj,
1597 struct kobj_attribute *attr,
1598 const char *buf, size_t len)
1600 return set_trigger(buf, &on_poff_trigger, len);
1602 static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff);
1604 static void do_machine_power_off(void)
1607 on_poff_trigger.action->fn(&on_poff_trigger);
1608 stop_run(&on_poff_trigger);
1610 void (*_machine_power_off)(void) = do_machine_power_off;
1612 static struct attribute *shutdown_action_attrs[] = {
1613 &on_restart_attr.attr,
1614 &on_reboot_attr.attr,
1615 &on_panic_attr.attr,
1621 static struct attribute_group shutdown_action_attr_group = {
1622 .attrs = shutdown_action_attrs,
1625 static void __init shutdown_triggers_init(void)
1627 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1629 if (!shutdown_actions_kset)
1631 if (sysfs_create_group(&shutdown_actions_kset->kobj,
1632 &shutdown_action_attr_group))
1636 panic("shutdown_triggers_init failed\n");
1639 static void __init shutdown_actions_init(void)
1643 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1644 if (!shutdown_actions_list[i]->init)
1646 shutdown_actions_list[i]->init_rc =
1647 shutdown_actions_list[i]->init();
1651 static int __init s390_ipl_init(void)
1653 char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40};
1655 sclp_early_get_ipl_info(&sclp_ipl_info);
1657 * Fix loadparm: There are systems where the (SCSI) LOADPARM
1658 * returned by read SCP info is invalid (contains EBCDIC blanks)
1659 * when the system has been booted via diag308. In that case we use
1660 * the value from diag308, if available.
1662 * There are also systems where diag308 store does not work in
1663 * case the system is booted from HMC. Fortunately in this case
1664 * READ SCP info provides the correct value.
1666 if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 && ipl_block_valid)
1667 memcpy(sclp_ipl_info.loadparm, ipl_block.hdr.loadparm, LOADPARM_LEN);
1668 shutdown_actions_init();
1669 shutdown_triggers_init();
1673 __initcall(s390_ipl_init);
1675 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1680 for (sx = 0; src[sx] != 0; sx++) {
1683 dst[dx++] = src[sx];
1689 static int __init vmcmd_on_reboot_setup(char *str)
1693 strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1694 vmcmd_on_reboot[127] = 0;
1695 on_reboot_trigger.action = &vmcmd_action;
1698 __setup("vmreboot=", vmcmd_on_reboot_setup);
1700 static int __init vmcmd_on_panic_setup(char *str)
1704 strncpy_skip_quote(vmcmd_on_panic, str, 127);
1705 vmcmd_on_panic[127] = 0;
1706 on_panic_trigger.action = &vmcmd_action;
1709 __setup("vmpanic=", vmcmd_on_panic_setup);
1711 static int __init vmcmd_on_halt_setup(char *str)
1715 strncpy_skip_quote(vmcmd_on_halt, str, 127);
1716 vmcmd_on_halt[127] = 0;
1717 on_halt_trigger.action = &vmcmd_action;
1720 __setup("vmhalt=", vmcmd_on_halt_setup);
1722 static int __init vmcmd_on_poff_setup(char *str)
1726 strncpy_skip_quote(vmcmd_on_poff, str, 127);
1727 vmcmd_on_poff[127] = 0;
1728 on_poff_trigger.action = &vmcmd_action;
1731 __setup("vmpoff=", vmcmd_on_poff_setup);
1733 static int on_panic_notify(struct notifier_block *self,
1734 unsigned long event, void *data)
1740 static struct notifier_block on_panic_nb = {
1741 .notifier_call = on_panic_notify,
1742 .priority = INT_MIN,
1745 void __init setup_ipl(void)
1747 BUILD_BUG_ON(sizeof(struct ipl_parameter_block) != PAGE_SIZE);
1749 ipl_info.type = get_ipl_type();
1750 switch (ipl_info.type) {
1752 ipl_info.data.ccw.dev_id.ssid = ipl_block.ipl_info.ccw.ssid;
1753 ipl_info.data.ccw.dev_id.devno = ipl_block.ipl_info.ccw.devno;
1756 case IPL_TYPE_FCP_DUMP:
1757 ipl_info.data.fcp.dev_id.ssid = 0;
1758 ipl_info.data.fcp.dev_id.devno = ipl_block.ipl_info.fcp.devno;
1759 ipl_info.data.fcp.wwpn = ipl_block.ipl_info.fcp.wwpn;
1760 ipl_info.data.fcp.lun = ipl_block.ipl_info.fcp.lun;
1763 case IPL_TYPE_UNKNOWN:
1764 /* We have no info to copy */
1767 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1770 void __init ipl_store_parameters(void)
1774 rc = diag308(DIAG308_STORE, &ipl_block);
1775 if (rc == DIAG308_RC_OK && ipl_block.hdr.version <= IPL_MAX_SUPPORTED_VERSION)
1776 ipl_block_valid = 1;
1779 void s390_reset_system(void)
1781 /* Disable prefixing */
1784 /* Disable lowcore protection */
1785 __ctl_clear_bit(0, 28);