2 * arch/s390/kernel/ipl.c
3 * ipl/reipl/dump support for Linux on s390.
5 * Copyright IBM Corp. 2005,2007
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/module.h>
13 #include <linux/device.h>
14 #include <linux/delay.h>
15 #include <linux/reboot.h>
16 #include <linux/ctype.h>
19 #include <asm/setup.h>
20 #include <asm/cpcmd.h>
22 #include <asm/ebcdic.h>
23 #include <asm/reset.h>
26 #define IPL_PARM_BLOCK_VERSION 0
28 #define IPL_UNKNOWN_STR "unknown"
29 #define IPL_CCW_STR "ccw"
30 #define IPL_FCP_STR "fcp"
31 #define IPL_FCP_DUMP_STR "fcp_dump"
32 #define IPL_NSS_STR "nss"
34 #define DUMP_CCW_STR "ccw"
35 #define DUMP_FCP_STR "fcp"
36 #define DUMP_NONE_STR "none"
39 * Four shutdown trigger types are supported:
45 #define ON_PANIC_STR "on_panic"
46 #define ON_HALT_STR "on_halt"
47 #define ON_POFF_STR "on_poff"
48 #define ON_REIPL_STR "on_reboot"
50 struct shutdown_action;
51 struct shutdown_trigger {
53 struct shutdown_action *action;
57 * Five shutdown action types are supported:
59 #define SHUTDOWN_ACTION_IPL_STR "ipl"
60 #define SHUTDOWN_ACTION_REIPL_STR "reipl"
61 #define SHUTDOWN_ACTION_DUMP_STR "dump"
62 #define SHUTDOWN_ACTION_VMCMD_STR "vmcmd"
63 #define SHUTDOWN_ACTION_STOP_STR "stop"
65 struct shutdown_action {
67 void (*fn) (struct shutdown_trigger *trigger);
71 static char *ipl_type_str(enum ipl_type type)
78 case IPL_TYPE_FCP_DUMP:
79 return IPL_FCP_DUMP_STR;
82 case IPL_TYPE_UNKNOWN:
84 return IPL_UNKNOWN_STR;
94 static char *dump_type_str(enum dump_type type)
109 * Must be in data section since the bss section
110 * is not cleared when these are accessed.
112 static u16 ipl_devno __attribute__((__section__(".data"))) = 0;
113 u32 ipl_flags __attribute__((__section__(".data"))) = 0;
116 REIPL_METHOD_CCW_CIO,
117 REIPL_METHOD_CCW_DIAG,
119 REIPL_METHOD_FCP_RO_DIAG,
120 REIPL_METHOD_FCP_RW_DIAG,
121 REIPL_METHOD_FCP_RO_VM,
122 REIPL_METHOD_FCP_DUMP,
124 REIPL_METHOD_DEFAULT,
130 DUMP_METHOD_CCW_DIAG,
132 DUMP_METHOD_FCP_DIAG,
135 static int diag308_set_works = 0;
137 static int reipl_capabilities = IPL_TYPE_UNKNOWN;
139 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
140 static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
141 static struct ipl_parameter_block *reipl_block_fcp;
142 static struct ipl_parameter_block *reipl_block_ccw;
144 static char reipl_nss_name[NSS_NAME_SIZE + 1];
146 static int dump_capabilities = DUMP_TYPE_NONE;
147 static enum dump_type dump_type = DUMP_TYPE_NONE;
148 static enum dump_method dump_method = DUMP_METHOD_NONE;
149 static struct ipl_parameter_block *dump_block_fcp;
150 static struct ipl_parameter_block *dump_block_ccw;
152 static struct sclp_ipl_info sclp_ipl_info;
154 int diag308(unsigned long subcode, void *addr)
156 register unsigned long _addr asm("0") = (unsigned long) addr;
157 register unsigned long _rc asm("1") = 0;
160 " diag %0,%2,0x308\n"
163 : "+d" (_addr), "+d" (_rc)
164 : "d" (subcode) : "cc", "memory");
167 EXPORT_SYMBOL_GPL(diag308);
171 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
172 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
173 struct kobj_attribute *attr, \
176 return sprintf(page, _format, _value); \
178 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
179 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL);
181 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
182 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
183 struct kobj_attribute *attr, \
186 return sprintf(page, _fmt_out, \
187 (unsigned long long) _value); \
189 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
190 struct kobj_attribute *attr, \
191 const char *buf, size_t len) \
193 unsigned long long value; \
194 if (sscanf(buf, _fmt_in, &value) != 1) \
199 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
200 __ATTR(_name,(S_IRUGO | S_IWUSR), \
201 sys_##_prefix##_##_name##_show, \
202 sys_##_prefix##_##_name##_store);
204 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
205 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
206 struct kobj_attribute *attr, \
209 return sprintf(page, _fmt_out, _value); \
211 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
212 struct kobj_attribute *attr, \
213 const char *buf, size_t len) \
215 strncpy(_value, buf, sizeof(_value) - 1); \
219 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
220 __ATTR(_name,(S_IRUGO | S_IWUSR), \
221 sys_##_prefix##_##_name##_show, \
222 sys_##_prefix##_##_name##_store);
224 static void make_attrs_ro(struct attribute **attrs)
227 (*attrs)->mode = S_IRUGO;
236 static __init enum ipl_type get_ipl_type(void)
238 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
240 if (ipl_flags & IPL_NSS_VALID)
242 if (!(ipl_flags & IPL_DEVNO_VALID))
243 return IPL_TYPE_UNKNOWN;
244 if (!(ipl_flags & IPL_PARMBLOCK_VALID))
246 if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
247 return IPL_TYPE_UNKNOWN;
248 if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
249 return IPL_TYPE_UNKNOWN;
250 if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
251 return IPL_TYPE_FCP_DUMP;
255 struct ipl_info ipl_info;
256 EXPORT_SYMBOL_GPL(ipl_info);
258 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
261 return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
264 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
266 static ssize_t sys_ipl_device_show(struct kobject *kobj,
267 struct kobj_attribute *attr, char *page)
269 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
271 switch (ipl_info.type) {
273 return sprintf(page, "0.0.%04x\n", ipl_devno);
275 case IPL_TYPE_FCP_DUMP:
276 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
282 static struct kobj_attribute sys_ipl_device_attr =
283 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
285 static ssize_t ipl_parameter_read(struct kobject *kobj, struct bin_attribute *attr,
286 char *buf, loff_t off, size_t count)
288 unsigned int size = IPL_PARMBLOCK_SIZE;
292 if (off + count > size)
294 memcpy(buf, (void *)IPL_PARMBLOCK_START + off, count);
298 static struct bin_attribute ipl_parameter_attr = {
300 .name = "binary_parameter",
304 .read = &ipl_parameter_read,
307 static ssize_t ipl_scp_data_read(struct kobject *kobj, struct bin_attribute *attr,
308 char *buf, loff_t off, size_t count)
310 unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
311 void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
315 if (off + count > size)
317 memcpy(buf, scp_data + off, count);
321 static struct bin_attribute ipl_scp_data_attr = {
327 .read = ipl_scp_data_read,
330 /* FCP ipl device attributes */
332 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
333 IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
334 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
335 IPL_PARMBLOCK_START->ipl_info.fcp.lun);
336 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
337 IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
338 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
339 IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
341 static struct attribute *ipl_fcp_attrs[] = {
342 &sys_ipl_type_attr.attr,
343 &sys_ipl_device_attr.attr,
344 &sys_ipl_fcp_wwpn_attr.attr,
345 &sys_ipl_fcp_lun_attr.attr,
346 &sys_ipl_fcp_bootprog_attr.attr,
347 &sys_ipl_fcp_br_lba_attr.attr,
351 static struct attribute_group ipl_fcp_attr_group = {
352 .attrs = ipl_fcp_attrs,
355 /* CCW ipl device attributes */
357 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
358 struct kobj_attribute *attr, char *page)
360 char loadparm[LOADPARM_LEN + 1] = {};
362 if (!sclp_ipl_info.is_valid)
363 return sprintf(page, "#unknown#\n");
364 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
365 EBCASC(loadparm, LOADPARM_LEN);
367 return sprintf(page, "%s\n", loadparm);
370 static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
371 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
373 static struct attribute *ipl_ccw_attrs[] = {
374 &sys_ipl_type_attr.attr,
375 &sys_ipl_device_attr.attr,
376 &sys_ipl_ccw_loadparm_attr.attr,
380 static struct attribute_group ipl_ccw_attr_group = {
381 .attrs = ipl_ccw_attrs,
384 /* NSS ipl device attributes */
386 DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
388 static struct attribute *ipl_nss_attrs[] = {
389 &sys_ipl_type_attr.attr,
390 &sys_ipl_nss_name_attr.attr,
394 static struct attribute_group ipl_nss_attr_group = {
395 .attrs = ipl_nss_attrs,
398 /* UNKNOWN ipl device attributes */
400 static struct attribute *ipl_unknown_attrs[] = {
401 &sys_ipl_type_attr.attr,
405 static struct attribute_group ipl_unknown_attr_group = {
406 .attrs = ipl_unknown_attrs,
409 static struct kset *ipl_kset;
411 static int __init ipl_register_fcp_files(void)
415 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
418 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
421 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_scp_data_attr);
425 sysfs_remove_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
428 sysfs_remove_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
433 static void ipl_run(struct shutdown_trigger *trigger)
435 diag308(DIAG308_IPL, NULL);
437 __cpcmd("IPL", NULL, 0, NULL);
438 else if (ipl_info.type == IPL_TYPE_CCW)
439 reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
442 static int ipl_init(void)
446 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
451 switch (ipl_info.type) {
453 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_ccw_attr_group);
456 case IPL_TYPE_FCP_DUMP:
457 rc = ipl_register_fcp_files();
460 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group);
463 rc = sysfs_create_group(&ipl_kset->kobj,
464 &ipl_unknown_attr_group);
469 panic("ipl_init failed: rc = %i\n", rc);
474 static struct shutdown_action ipl_action = {SHUTDOWN_ACTION_IPL_STR, ipl_run,
478 * reipl shutdown action: Reboot Linux on shutdown.
481 /* FCP reipl device attributes */
483 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n",
484 reipl_block_fcp->ipl_info.fcp.wwpn);
485 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n",
486 reipl_block_fcp->ipl_info.fcp.lun);
487 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
488 reipl_block_fcp->ipl_info.fcp.bootprog);
489 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
490 reipl_block_fcp->ipl_info.fcp.br_lba);
491 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
492 reipl_block_fcp->ipl_info.fcp.devno);
494 static struct attribute *reipl_fcp_attrs[] = {
495 &sys_reipl_fcp_device_attr.attr,
496 &sys_reipl_fcp_wwpn_attr.attr,
497 &sys_reipl_fcp_lun_attr.attr,
498 &sys_reipl_fcp_bootprog_attr.attr,
499 &sys_reipl_fcp_br_lba_attr.attr,
503 static struct attribute_group reipl_fcp_attr_group = {
505 .attrs = reipl_fcp_attrs,
508 /* CCW reipl device attributes */
510 DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
511 reipl_block_ccw->ipl_info.ccw.devno);
513 static void reipl_get_ascii_loadparm(char *loadparm)
515 memcpy(loadparm, &reipl_block_ccw->ipl_info.ccw.load_param,
517 EBCASC(loadparm, LOADPARM_LEN);
518 loadparm[LOADPARM_LEN] = 0;
522 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
523 struct kobj_attribute *attr, char *page)
525 char buf[LOADPARM_LEN + 1];
527 reipl_get_ascii_loadparm(buf);
528 return sprintf(page, "%s\n", buf);
531 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
532 struct kobj_attribute *attr,
533 const char *buf, size_t len)
537 /* ignore trailing newline */
539 if ((len > 0) && (buf[len - 1] == '\n'))
541 /* loadparm can have max 8 characters and must not start with a blank */
542 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
544 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
545 for (i = 0; i < lp_len; i++) {
546 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
551 /* initialize loadparm with blanks */
552 memset(&reipl_block_ccw->ipl_info.ccw.load_param, ' ', LOADPARM_LEN);
553 /* copy and convert to ebcdic */
554 memcpy(&reipl_block_ccw->ipl_info.ccw.load_param, buf, lp_len);
555 ASCEBC(reipl_block_ccw->ipl_info.ccw.load_param, LOADPARM_LEN);
559 static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
560 __ATTR(loadparm, 0644, reipl_ccw_loadparm_show,
561 reipl_ccw_loadparm_store);
563 static struct attribute *reipl_ccw_attrs[] = {
564 &sys_reipl_ccw_device_attr.attr,
565 &sys_reipl_ccw_loadparm_attr.attr,
569 static struct attribute_group reipl_ccw_attr_group = {
571 .attrs = reipl_ccw_attrs,
575 /* NSS reipl device attributes */
577 DEFINE_IPL_ATTR_STR_RW(reipl_nss, name, "%s\n", "%s\n", reipl_nss_name);
579 static struct attribute *reipl_nss_attrs[] = {
580 &sys_reipl_nss_name_attr.attr,
584 static struct attribute_group reipl_nss_attr_group = {
586 .attrs = reipl_nss_attrs,
591 static int reipl_set_type(enum ipl_type type)
593 if (!(reipl_capabilities & type))
598 if (diag308_set_works)
599 reipl_method = REIPL_METHOD_CCW_DIAG;
600 else if (MACHINE_IS_VM)
601 reipl_method = REIPL_METHOD_CCW_VM;
603 reipl_method = REIPL_METHOD_CCW_CIO;
606 if (diag308_set_works)
607 reipl_method = REIPL_METHOD_FCP_RW_DIAG;
608 else if (MACHINE_IS_VM)
609 reipl_method = REIPL_METHOD_FCP_RO_VM;
611 reipl_method = REIPL_METHOD_FCP_RO_DIAG;
613 case IPL_TYPE_FCP_DUMP:
614 reipl_method = REIPL_METHOD_FCP_DUMP;
617 reipl_method = REIPL_METHOD_NSS;
619 case IPL_TYPE_UNKNOWN:
620 reipl_method = REIPL_METHOD_DEFAULT;
629 static ssize_t reipl_type_show(struct kobject *kobj,
630 struct kobj_attribute *attr, char *page)
632 return sprintf(page, "%s\n", ipl_type_str(reipl_type));
635 static ssize_t reipl_type_store(struct kobject *kobj,
636 struct kobj_attribute *attr,
637 const char *buf, size_t len)
641 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
642 rc = reipl_set_type(IPL_TYPE_CCW);
643 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
644 rc = reipl_set_type(IPL_TYPE_FCP);
645 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
646 rc = reipl_set_type(IPL_TYPE_NSS);
647 return (rc != 0) ? rc : len;
650 static struct kobj_attribute reipl_type_attr =
651 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
653 static struct kset *reipl_kset;
655 void reipl_run(struct shutdown_trigger *trigger)
657 struct ccw_dev_id devid;
658 static char buf[100];
659 char loadparm[LOADPARM_LEN + 1];
661 switch (reipl_method) {
662 case REIPL_METHOD_CCW_CIO:
663 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
665 reipl_ccw_dev(&devid);
667 case REIPL_METHOD_CCW_VM:
668 reipl_get_ascii_loadparm(loadparm);
669 if (strlen(loadparm) == 0)
670 sprintf(buf, "IPL %X CLEAR",
671 reipl_block_ccw->ipl_info.ccw.devno);
673 sprintf(buf, "IPL %X CLEAR LOADPARM '%s'",
674 reipl_block_ccw->ipl_info.ccw.devno, loadparm);
675 __cpcmd(buf, NULL, 0, NULL);
677 case REIPL_METHOD_CCW_DIAG:
678 diag308(DIAG308_SET, reipl_block_ccw);
679 diag308(DIAG308_IPL, NULL);
681 case REIPL_METHOD_FCP_RW_DIAG:
682 diag308(DIAG308_SET, reipl_block_fcp);
683 diag308(DIAG308_IPL, NULL);
685 case REIPL_METHOD_FCP_RO_DIAG:
686 diag308(DIAG308_IPL, NULL);
688 case REIPL_METHOD_FCP_RO_VM:
689 __cpcmd("IPL", NULL, 0, NULL);
691 case REIPL_METHOD_NSS:
692 sprintf(buf, "IPL %s", reipl_nss_name);
693 __cpcmd(buf, NULL, 0, NULL);
695 case REIPL_METHOD_DEFAULT:
697 __cpcmd("IPL", NULL, 0, NULL);
698 diag308(DIAG308_IPL, NULL);
700 case REIPL_METHOD_FCP_DUMP:
706 static void __init reipl_probe(void)
710 buffer = (void *) get_zeroed_page(GFP_KERNEL);
713 if (diag308(DIAG308_STORE, buffer) == DIAG308_RC_OK)
714 diag308_set_works = 1;
715 free_page((unsigned long)buffer);
718 static int __init reipl_nss_init(void)
724 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
727 strncpy(reipl_nss_name, kernel_nss_name, NSS_NAME_SIZE + 1);
728 reipl_capabilities |= IPL_TYPE_NSS;
732 static int __init reipl_ccw_init(void)
736 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
737 if (!reipl_block_ccw)
739 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_ccw_attr_group);
741 free_page((unsigned long)reipl_block_ccw);
744 reipl_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
745 reipl_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
746 reipl_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
747 reipl_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
748 reipl_block_ccw->hdr.flags = DIAG308_FLAGS_LP_VALID;
749 /* check if read scp info worked and set loadparm */
750 if (sclp_ipl_info.is_valid)
751 memcpy(reipl_block_ccw->ipl_info.ccw.load_param,
752 &sclp_ipl_info.loadparm, LOADPARM_LEN);
754 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
755 memset(reipl_block_ccw->ipl_info.ccw.load_param, 0x40,
757 if (!MACHINE_IS_VM && !diag308_set_works)
758 sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
759 if (ipl_info.type == IPL_TYPE_CCW)
760 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
761 reipl_capabilities |= IPL_TYPE_CCW;
765 static int __init reipl_fcp_init(void)
769 if ((!diag308_set_works) && (ipl_info.type != IPL_TYPE_FCP))
771 if ((!diag308_set_works) && (ipl_info.type == IPL_TYPE_FCP))
772 make_attrs_ro(reipl_fcp_attrs);
774 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
775 if (!reipl_block_fcp)
777 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_fcp_attr_group);
779 free_page((unsigned long)reipl_block_fcp);
782 if (ipl_info.type == IPL_TYPE_FCP) {
783 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
785 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
786 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
787 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
788 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
789 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
791 reipl_capabilities |= IPL_TYPE_FCP;
795 static int reipl_init(void)
799 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
802 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
804 kset_unregister(reipl_kset);
807 rc = reipl_ccw_init();
810 rc = reipl_fcp_init();
813 rc = reipl_nss_init();
816 rc = reipl_set_type(ipl_info.type);
822 static struct shutdown_action reipl_action = {SHUTDOWN_ACTION_REIPL_STR,
823 reipl_run, reipl_init};
826 * dump shutdown action: Dump Linux on shutdown.
829 /* FCP dump device attributes */
831 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n",
832 dump_block_fcp->ipl_info.fcp.wwpn);
833 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n",
834 dump_block_fcp->ipl_info.fcp.lun);
835 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
836 dump_block_fcp->ipl_info.fcp.bootprog);
837 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
838 dump_block_fcp->ipl_info.fcp.br_lba);
839 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
840 dump_block_fcp->ipl_info.fcp.devno);
842 static struct attribute *dump_fcp_attrs[] = {
843 &sys_dump_fcp_device_attr.attr,
844 &sys_dump_fcp_wwpn_attr.attr,
845 &sys_dump_fcp_lun_attr.attr,
846 &sys_dump_fcp_bootprog_attr.attr,
847 &sys_dump_fcp_br_lba_attr.attr,
851 static struct attribute_group dump_fcp_attr_group = {
853 .attrs = dump_fcp_attrs,
856 /* CCW dump device attributes */
858 DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
859 dump_block_ccw->ipl_info.ccw.devno);
861 static struct attribute *dump_ccw_attrs[] = {
862 &sys_dump_ccw_device_attr.attr,
866 static struct attribute_group dump_ccw_attr_group = {
868 .attrs = dump_ccw_attrs,
873 static int dump_set_type(enum dump_type type)
875 if (!(dump_capabilities & type))
879 if (diag308_set_works)
880 dump_method = DUMP_METHOD_CCW_DIAG;
881 else if (MACHINE_IS_VM)
882 dump_method = DUMP_METHOD_CCW_VM;
884 dump_method = DUMP_METHOD_CCW_CIO;
887 dump_method = DUMP_METHOD_FCP_DIAG;
890 dump_method = DUMP_METHOD_NONE;
896 static ssize_t dump_type_show(struct kobject *kobj,
897 struct kobj_attribute *attr, char *page)
899 return sprintf(page, "%s\n", dump_type_str(dump_type));
902 static ssize_t dump_type_store(struct kobject *kobj,
903 struct kobj_attribute *attr,
904 const char *buf, size_t len)
908 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
909 rc = dump_set_type(DUMP_TYPE_NONE);
910 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
911 rc = dump_set_type(DUMP_TYPE_CCW);
912 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
913 rc = dump_set_type(DUMP_TYPE_FCP);
914 return (rc != 0) ? rc : len;
917 static struct kobj_attribute dump_type_attr =
918 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
920 static struct kset *dump_kset;
922 static void dump_run(struct shutdown_trigger *trigger)
924 struct ccw_dev_id devid;
925 static char buf[100];
927 switch (dump_method) {
928 case DUMP_METHOD_CCW_CIO:
930 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
932 reipl_ccw_dev(&devid);
934 case DUMP_METHOD_CCW_VM:
936 sprintf(buf, "STORE STATUS");
937 __cpcmd(buf, NULL, 0, NULL);
938 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
939 __cpcmd(buf, NULL, 0, NULL);
941 case DUMP_METHOD_CCW_DIAG:
942 diag308(DIAG308_SET, dump_block_ccw);
943 diag308(DIAG308_DUMP, NULL);
945 case DUMP_METHOD_FCP_DIAG:
946 diag308(DIAG308_SET, dump_block_fcp);
947 diag308(DIAG308_DUMP, NULL);
949 case DUMP_METHOD_NONE:
953 printk(KERN_EMERG "Dump failed!\n");
956 static int __init dump_ccw_init(void)
960 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
963 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
965 free_page((unsigned long)dump_block_ccw);
968 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
969 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
970 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
971 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
972 dump_capabilities |= DUMP_TYPE_CCW;
976 static int __init dump_fcp_init(void)
980 if (!sclp_ipl_info.has_dump)
981 return 0; /* LDIPL DUMP is not installed */
982 if (!diag308_set_works)
984 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
987 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
989 free_page((unsigned long)dump_block_fcp);
992 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
993 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
994 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
995 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
996 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
997 dump_capabilities |= DUMP_TYPE_FCP;
1001 static int dump_init(void)
1005 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1008 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1010 kset_unregister(dump_kset);
1013 rc = dump_ccw_init();
1016 rc = dump_fcp_init();
1019 dump_set_type(DUMP_TYPE_NONE);
1023 static struct shutdown_action dump_action = {SHUTDOWN_ACTION_DUMP_STR,
1024 dump_run, dump_init};
1027 * vmcmd shutdown action: Trigger vm command on shutdown.
1030 static char vmcmd_on_reboot[128];
1031 static char vmcmd_on_panic[128];
1032 static char vmcmd_on_halt[128];
1033 static char vmcmd_on_poff[128];
1035 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1036 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1037 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1038 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1040 static struct attribute *vmcmd_attrs[] = {
1041 &sys_vmcmd_on_reboot_attr.attr,
1042 &sys_vmcmd_on_panic_attr.attr,
1043 &sys_vmcmd_on_halt_attr.attr,
1044 &sys_vmcmd_on_poff_attr.attr,
1048 static struct attribute_group vmcmd_attr_group = {
1049 .attrs = vmcmd_attrs,
1052 static struct kset *vmcmd_kset;
1054 static void vmcmd_run(struct shutdown_trigger *trigger)
1056 char *cmd, *next_cmd;
1058 if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1059 cmd = vmcmd_on_reboot;
1060 else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1061 cmd = vmcmd_on_panic;
1062 else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1063 cmd = vmcmd_on_halt;
1064 else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1065 cmd = vmcmd_on_poff;
1069 if (strlen(cmd) == 0)
1072 next_cmd = strchr(cmd, '\n');
1077 __cpcmd(cmd, NULL, 0, NULL);
1079 } while (cmd != NULL);
1082 static int vmcmd_init(void)
1086 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1089 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1092 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1093 vmcmd_run, vmcmd_init};
1096 * stop shutdown action: Stop Linux on shutdown.
1099 static void stop_run(struct shutdown_trigger *trigger)
1101 if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1102 disabled_wait((unsigned long) __builtin_return_address(0));
1104 signal_processor(smp_processor_id(), sigp_stop);
1109 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1114 static struct shutdown_action *shutdown_actions_list[] = {
1115 &ipl_action, &reipl_action, &dump_action, &vmcmd_action, &stop_action};
1116 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1122 static struct kset *shutdown_actions_kset;
1124 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1128 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1129 if (!shutdown_actions_list[i])
1131 if (strncmp(buf, shutdown_actions_list[i]->name,
1132 strlen(shutdown_actions_list[i]->name)) == 0) {
1133 trigger->action = shutdown_actions_list[i];
1142 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1145 static ssize_t on_reboot_show(struct kobject *kobj,
1146 struct kobj_attribute *attr, char *page)
1148 return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1151 static ssize_t on_reboot_store(struct kobject *kobj,
1152 struct kobj_attribute *attr,
1153 const char *buf, size_t len)
1155 return set_trigger(buf, &on_reboot_trigger, len);
1158 static struct kobj_attribute on_reboot_attr =
1159 __ATTR(on_reboot, 0644, on_reboot_show, on_reboot_store);
1161 static void do_machine_restart(char *__unused)
1164 on_reboot_trigger.action->fn(&on_reboot_trigger);
1167 void (*_machine_restart)(char *command) = do_machine_restart;
1171 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1173 static ssize_t on_panic_show(struct kobject *kobj,
1174 struct kobj_attribute *attr, char *page)
1176 return sprintf(page, "%s\n", on_panic_trigger.action->name);
1179 static ssize_t on_panic_store(struct kobject *kobj,
1180 struct kobj_attribute *attr,
1181 const char *buf, size_t len)
1183 return set_trigger(buf, &on_panic_trigger, len);
1186 static struct kobj_attribute on_panic_attr =
1187 __ATTR(on_panic, 0644, on_panic_show, on_panic_store);
1189 static void do_panic(void)
1191 on_panic_trigger.action->fn(&on_panic_trigger);
1192 stop_run(&on_panic_trigger);
1197 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1199 static ssize_t on_halt_show(struct kobject *kobj,
1200 struct kobj_attribute *attr, char *page)
1202 return sprintf(page, "%s\n", on_halt_trigger.action->name);
1205 static ssize_t on_halt_store(struct kobject *kobj,
1206 struct kobj_attribute *attr,
1207 const char *buf, size_t len)
1209 return set_trigger(buf, &on_halt_trigger, len);
1212 static struct kobj_attribute on_halt_attr =
1213 __ATTR(on_halt, 0644, on_halt_show, on_halt_store);
1216 static void do_machine_halt(void)
1219 on_halt_trigger.action->fn(&on_halt_trigger);
1220 stop_run(&on_halt_trigger);
1222 void (*_machine_halt)(void) = do_machine_halt;
1226 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1228 static ssize_t on_poff_show(struct kobject *kobj,
1229 struct kobj_attribute *attr, char *page)
1231 return sprintf(page, "%s\n", on_poff_trigger.action->name);
1234 static ssize_t on_poff_store(struct kobject *kobj,
1235 struct kobj_attribute *attr,
1236 const char *buf, size_t len)
1238 return set_trigger(buf, &on_poff_trigger, len);
1241 static struct kobj_attribute on_poff_attr =
1242 __ATTR(on_poff, 0644, on_poff_show, on_poff_store);
1245 static void do_machine_power_off(void)
1248 on_poff_trigger.action->fn(&on_poff_trigger);
1249 stop_run(&on_poff_trigger);
1251 void (*_machine_power_off)(void) = do_machine_power_off;
1253 static void __init shutdown_triggers_init(void)
1255 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1257 if (!shutdown_actions_kset)
1259 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1260 &on_reboot_attr.attr))
1262 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1263 &on_panic_attr.attr))
1265 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1266 &on_halt_attr.attr))
1268 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1269 &on_poff_attr.attr))
1274 panic("shutdown_triggers_init failed\n");
1277 static void __init shutdown_actions_init(void)
1281 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1282 if (!shutdown_actions_list[i]->init)
1284 if (shutdown_actions_list[i]->init())
1285 shutdown_actions_list[i] = NULL;
1289 static int __init s390_ipl_init(void)
1292 sclp_get_ipl_info(&sclp_ipl_info);
1293 shutdown_actions_init();
1294 shutdown_triggers_init();
1298 __initcall(s390_ipl_init);
1300 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1305 for (sx = 0; src[sx] != 0; sx++) {
1308 dst[dx++] = src[sx];
1314 static int __init vmcmd_on_reboot_setup(char *str)
1318 strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1319 vmcmd_on_reboot[127] = 0;
1320 on_reboot_trigger.action = &vmcmd_action;
1323 __setup("vmreboot=", vmcmd_on_reboot_setup);
1325 static int __init vmcmd_on_panic_setup(char *str)
1329 strncpy_skip_quote(vmcmd_on_panic, str, 127);
1330 vmcmd_on_panic[127] = 0;
1331 on_panic_trigger.action = &vmcmd_action;
1334 __setup("vmpanic=", vmcmd_on_panic_setup);
1336 static int __init vmcmd_on_halt_setup(char *str)
1340 strncpy_skip_quote(vmcmd_on_halt, str, 127);
1341 vmcmd_on_halt[127] = 0;
1342 on_halt_trigger.action = &vmcmd_action;
1345 __setup("vmhalt=", vmcmd_on_halt_setup);
1347 static int __init vmcmd_on_poff_setup(char *str)
1351 strncpy_skip_quote(vmcmd_on_poff, str, 127);
1352 vmcmd_on_poff[127] = 0;
1353 on_poff_trigger.action = &vmcmd_action;
1356 __setup("vmpoff=", vmcmd_on_poff_setup);
1358 static int on_panic_notify(struct notifier_block *self,
1359 unsigned long event, void *data)
1365 static struct notifier_block on_panic_nb = {
1366 .notifier_call = on_panic_notify,
1370 void __init setup_ipl(void)
1372 ipl_info.type = get_ipl_type();
1373 switch (ipl_info.type) {
1375 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1376 ipl_info.data.ccw.dev_id.ssid = 0;
1379 case IPL_TYPE_FCP_DUMP:
1380 ipl_info.data.fcp.dev_id.devno =
1381 IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1382 ipl_info.data.fcp.dev_id.ssid = 0;
1383 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1384 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1387 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1388 sizeof(ipl_info.data.nss.name));
1390 case IPL_TYPE_UNKNOWN:
1392 /* We have no info to copy */
1395 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1398 void __init ipl_save_parameters(void)
1400 struct cio_iplinfo iplinfo;
1401 unsigned int *ipl_ptr;
1404 if (cio_get_iplinfo(&iplinfo))
1407 ipl_devno = iplinfo.devno;
1408 ipl_flags |= IPL_DEVNO_VALID;
1409 if (!iplinfo.is_qdio)
1411 ipl_flags |= IPL_PARMBLOCK_VALID;
1412 ipl_ptr = (unsigned int *)__LC_IPL_PARMBLOCK_PTR;
1413 src = (void *)(unsigned long)*ipl_ptr;
1414 dst = (void *)IPL_PARMBLOCK_ORIGIN;
1415 memmove(dst, src, PAGE_SIZE);
1416 *ipl_ptr = IPL_PARMBLOCK_ORIGIN;
1419 static LIST_HEAD(rcall);
1420 static DEFINE_MUTEX(rcall_mutex);
1422 void register_reset_call(struct reset_call *reset)
1424 mutex_lock(&rcall_mutex);
1425 list_add(&reset->list, &rcall);
1426 mutex_unlock(&rcall_mutex);
1428 EXPORT_SYMBOL_GPL(register_reset_call);
1430 void unregister_reset_call(struct reset_call *reset)
1432 mutex_lock(&rcall_mutex);
1433 list_del(&reset->list);
1434 mutex_unlock(&rcall_mutex);
1436 EXPORT_SYMBOL_GPL(unregister_reset_call);
1438 static void do_reset_calls(void)
1440 struct reset_call *reset;
1442 list_for_each_entry(reset, &rcall, list)
1446 u32 dump_prefix_page;
1448 void s390_reset_system(void)
1450 struct _lowcore *lc;
1452 lc = (struct _lowcore *)(unsigned long) store_prefix();
1454 /* Stack for interrupt/machine check handler */
1455 lc->panic_stack = S390_lowcore.panic_stack;
1457 /* Save prefix page address for dump case */
1458 dump_prefix_page = (u32)(unsigned long) lc;
1460 /* Disable prefixing */
1463 /* Disable lowcore protection */
1464 __ctl_clear_bit(0,28);
1466 /* Set new machine check handler */
1467 S390_lowcore.mcck_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
1468 S390_lowcore.mcck_new_psw.addr =
1469 PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;
1471 /* Set new program check handler */
1472 S390_lowcore.program_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
1473 S390_lowcore.program_new_psw.addr =
1474 PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;