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>
20 #include <asm/setup.h>
21 #include <asm/cpcmd.h>
23 #include <asm/ebcdic.h>
24 #include <asm/reset.h>
27 #include <asm/checksum.h>
29 #define IPL_PARM_BLOCK_VERSION 0
31 #define IPL_UNKNOWN_STR "unknown"
32 #define IPL_CCW_STR "ccw"
33 #define IPL_FCP_STR "fcp"
34 #define IPL_FCP_DUMP_STR "fcp_dump"
35 #define IPL_NSS_STR "nss"
37 #define DUMP_CCW_STR "ccw"
38 #define DUMP_FCP_STR "fcp"
39 #define DUMP_NONE_STR "none"
42 * Four shutdown trigger types are supported:
48 #define ON_PANIC_STR "on_panic"
49 #define ON_HALT_STR "on_halt"
50 #define ON_POFF_STR "on_poff"
51 #define ON_REIPL_STR "on_reboot"
53 struct shutdown_action;
54 struct shutdown_trigger {
56 struct shutdown_action *action;
60 * The following shutdown action types are supported:
62 #define SHUTDOWN_ACTION_IPL_STR "ipl"
63 #define SHUTDOWN_ACTION_REIPL_STR "reipl"
64 #define SHUTDOWN_ACTION_DUMP_STR "dump"
65 #define SHUTDOWN_ACTION_VMCMD_STR "vmcmd"
66 #define SHUTDOWN_ACTION_STOP_STR "stop"
67 #define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl"
69 struct shutdown_action {
71 void (*fn) (struct shutdown_trigger *trigger);
76 static char *ipl_type_str(enum ipl_type type)
83 case IPL_TYPE_FCP_DUMP:
84 return IPL_FCP_DUMP_STR;
87 case IPL_TYPE_UNKNOWN:
89 return IPL_UNKNOWN_STR;
99 static char *dump_type_str(enum dump_type type)
103 return DUMP_NONE_STR;
114 * Must be in data section since the bss section
115 * is not cleared when these are accessed.
117 static u16 ipl_devno __attribute__((__section__(".data"))) = 0;
118 u32 ipl_flags __attribute__((__section__(".data"))) = 0;
121 REIPL_METHOD_CCW_CIO,
122 REIPL_METHOD_CCW_DIAG,
124 REIPL_METHOD_FCP_RO_DIAG,
125 REIPL_METHOD_FCP_RW_DIAG,
126 REIPL_METHOD_FCP_RO_VM,
127 REIPL_METHOD_FCP_DUMP,
129 REIPL_METHOD_NSS_DIAG,
130 REIPL_METHOD_DEFAULT,
136 DUMP_METHOD_CCW_DIAG,
138 DUMP_METHOD_FCP_DIAG,
141 static int diag308_set_works = 0;
143 static struct ipl_parameter_block ipl_block;
145 static int reipl_capabilities = IPL_TYPE_UNKNOWN;
147 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
148 static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
149 static struct ipl_parameter_block *reipl_block_fcp;
150 static struct ipl_parameter_block *reipl_block_ccw;
151 static struct ipl_parameter_block *reipl_block_nss;
152 static struct ipl_parameter_block *reipl_block_actual;
154 static int dump_capabilities = DUMP_TYPE_NONE;
155 static enum dump_type dump_type = DUMP_TYPE_NONE;
156 static enum dump_method dump_method = DUMP_METHOD_NONE;
157 static struct ipl_parameter_block *dump_block_fcp;
158 static struct ipl_parameter_block *dump_block_ccw;
160 static struct sclp_ipl_info sclp_ipl_info;
162 int diag308(unsigned long subcode, void *addr)
164 register unsigned long _addr asm("0") = (unsigned long) addr;
165 register unsigned long _rc asm("1") = 0;
168 " diag %0,%2,0x308\n"
171 : "+d" (_addr), "+d" (_rc)
172 : "d" (subcode) : "cc", "memory");
175 EXPORT_SYMBOL_GPL(diag308);
179 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
180 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
181 struct kobj_attribute *attr, \
184 return sprintf(page, _format, _value); \
186 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
187 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL);
189 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
190 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
191 struct kobj_attribute *attr, \
194 return sprintf(page, _fmt_out, \
195 (unsigned long long) _value); \
197 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
198 struct kobj_attribute *attr, \
199 const char *buf, size_t len) \
201 unsigned long long value; \
202 if (sscanf(buf, _fmt_in, &value) != 1) \
207 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
208 __ATTR(_name,(S_IRUGO | S_IWUSR), \
209 sys_##_prefix##_##_name##_show, \
210 sys_##_prefix##_##_name##_store);
212 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
213 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
214 struct kobj_attribute *attr, \
217 return sprintf(page, _fmt_out, _value); \
219 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
220 struct kobj_attribute *attr, \
221 const char *buf, size_t len) \
223 strncpy(_value, buf, sizeof(_value) - 1); \
227 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
228 __ATTR(_name,(S_IRUGO | S_IWUSR), \
229 sys_##_prefix##_##_name##_show, \
230 sys_##_prefix##_##_name##_store);
232 static void make_attrs_ro(struct attribute **attrs)
235 (*attrs)->mode = S_IRUGO;
244 static __init enum ipl_type get_ipl_type(void)
246 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
248 if (ipl_flags & IPL_NSS_VALID)
250 if (!(ipl_flags & IPL_DEVNO_VALID))
251 return IPL_TYPE_UNKNOWN;
252 if (!(ipl_flags & IPL_PARMBLOCK_VALID))
254 if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
255 return IPL_TYPE_UNKNOWN;
256 if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
257 return IPL_TYPE_UNKNOWN;
258 if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
259 return IPL_TYPE_FCP_DUMP;
263 struct ipl_info ipl_info;
264 EXPORT_SYMBOL_GPL(ipl_info);
266 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
269 return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
272 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
274 /* VM IPL PARM routines */
275 size_t reipl_get_ascii_vmparm(char *dest, size_t size,
276 const struct ipl_parameter_block *ipb)
280 char has_lowercase = 0;
283 if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
284 (ipb->ipl_info.ccw.vm_parm_len > 0)) {
286 len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
287 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
288 /* If at least one character is lowercase, we assume mixed
289 * case; otherwise we convert everything to lowercase.
291 for (i = 0; i < len; i++)
292 if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
293 (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
294 (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
299 EBC_TOLOWER(dest, len);
307 size_t append_ipl_vmparm(char *dest, size_t size)
312 if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
313 rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
319 static ssize_t ipl_vm_parm_show(struct kobject *kobj,
320 struct kobj_attribute *attr, char *page)
322 char parm[DIAG308_VMPARM_SIZE + 1] = {};
324 append_ipl_vmparm(parm, sizeof(parm));
325 return sprintf(page, "%s\n", parm);
328 static size_t scpdata_length(const char* buf, size_t count)
331 if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
338 size_t reipl_append_ascii_scpdata(char *dest, size_t size,
339 const struct ipl_parameter_block *ipb)
345 count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data,
346 ipb->ipl_info.fcp.scp_data_len));
351 for (i = 0; i < count; i++) {
352 if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
356 if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
361 memcpy(dest, ipb->ipl_info.fcp.scp_data, count);
363 for (i = 0; i < count; i++)
364 dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]);
370 size_t append_ipl_scpdata(char *dest, size_t len)
375 if (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP)
376 rc = reipl_append_ascii_scpdata(dest, len, &ipl_block);
383 static struct kobj_attribute sys_ipl_vm_parm_attr =
384 __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
386 static ssize_t sys_ipl_device_show(struct kobject *kobj,
387 struct kobj_attribute *attr, char *page)
389 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
391 switch (ipl_info.type) {
393 return sprintf(page, "0.0.%04x\n", ipl_devno);
395 case IPL_TYPE_FCP_DUMP:
396 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
402 static struct kobj_attribute sys_ipl_device_attr =
403 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
405 static ssize_t ipl_parameter_read(struct kobject *kobj, struct bin_attribute *attr,
406 char *buf, loff_t off, size_t count)
408 return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START,
412 static struct bin_attribute ipl_parameter_attr = {
414 .name = "binary_parameter",
418 .read = &ipl_parameter_read,
421 static ssize_t ipl_scp_data_read(struct kobject *kobj, struct bin_attribute *attr,
422 char *buf, loff_t off, size_t count)
424 unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
425 void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
427 return memory_read_from_buffer(buf, count, &off, scp_data, size);
430 static struct bin_attribute ipl_scp_data_attr = {
436 .read = ipl_scp_data_read,
439 /* FCP ipl device attributes */
441 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
442 IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
443 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
444 IPL_PARMBLOCK_START->ipl_info.fcp.lun);
445 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
446 IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
447 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
448 IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
450 static struct attribute *ipl_fcp_attrs[] = {
451 &sys_ipl_type_attr.attr,
452 &sys_ipl_device_attr.attr,
453 &sys_ipl_fcp_wwpn_attr.attr,
454 &sys_ipl_fcp_lun_attr.attr,
455 &sys_ipl_fcp_bootprog_attr.attr,
456 &sys_ipl_fcp_br_lba_attr.attr,
460 static struct attribute_group ipl_fcp_attr_group = {
461 .attrs = ipl_fcp_attrs,
464 /* CCW ipl device attributes */
466 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
467 struct kobj_attribute *attr, char *page)
469 char loadparm[LOADPARM_LEN + 1] = {};
471 if (!sclp_ipl_info.is_valid)
472 return sprintf(page, "#unknown#\n");
473 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
474 EBCASC(loadparm, LOADPARM_LEN);
476 return sprintf(page, "%s\n", loadparm);
479 static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
480 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
482 static struct attribute *ipl_ccw_attrs_vm[] = {
483 &sys_ipl_type_attr.attr,
484 &sys_ipl_device_attr.attr,
485 &sys_ipl_ccw_loadparm_attr.attr,
486 &sys_ipl_vm_parm_attr.attr,
490 static struct attribute *ipl_ccw_attrs_lpar[] = {
491 &sys_ipl_type_attr.attr,
492 &sys_ipl_device_attr.attr,
493 &sys_ipl_ccw_loadparm_attr.attr,
497 static struct attribute_group ipl_ccw_attr_group_vm = {
498 .attrs = ipl_ccw_attrs_vm,
501 static struct attribute_group ipl_ccw_attr_group_lpar = {
502 .attrs = ipl_ccw_attrs_lpar
505 /* NSS ipl device attributes */
507 DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
509 static struct attribute *ipl_nss_attrs[] = {
510 &sys_ipl_type_attr.attr,
511 &sys_ipl_nss_name_attr.attr,
512 &sys_ipl_ccw_loadparm_attr.attr,
513 &sys_ipl_vm_parm_attr.attr,
517 static struct attribute_group ipl_nss_attr_group = {
518 .attrs = ipl_nss_attrs,
521 /* UNKNOWN ipl device attributes */
523 static struct attribute *ipl_unknown_attrs[] = {
524 &sys_ipl_type_attr.attr,
528 static struct attribute_group ipl_unknown_attr_group = {
529 .attrs = ipl_unknown_attrs,
532 static struct kset *ipl_kset;
534 static int __init ipl_register_fcp_files(void)
538 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
541 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
544 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_scp_data_attr);
548 sysfs_remove_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
551 sysfs_remove_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
556 static void __ipl_run(void *unused)
558 diag308(DIAG308_IPL, NULL);
560 __cpcmd("IPL", NULL, 0, NULL);
561 else if (ipl_info.type == IPL_TYPE_CCW)
562 reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
565 static void ipl_run(struct shutdown_trigger *trigger)
567 smp_switch_to_ipl_cpu(__ipl_run, NULL);
570 static int __init ipl_init(void)
574 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
579 switch (ipl_info.type) {
582 rc = sysfs_create_group(&ipl_kset->kobj,
583 &ipl_ccw_attr_group_vm);
585 rc = sysfs_create_group(&ipl_kset->kobj,
586 &ipl_ccw_attr_group_lpar);
589 case IPL_TYPE_FCP_DUMP:
590 rc = ipl_register_fcp_files();
593 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group);
596 rc = sysfs_create_group(&ipl_kset->kobj,
597 &ipl_unknown_attr_group);
602 panic("ipl_init failed: rc = %i\n", rc);
607 static struct shutdown_action __refdata ipl_action = {
608 .name = SHUTDOWN_ACTION_IPL_STR,
614 * reipl shutdown action: Reboot Linux on shutdown.
617 /* VM IPL PARM attributes */
618 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
621 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
623 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
624 return sprintf(page, "%s\n", vmparm);
627 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
629 const char *buf, size_t len)
633 /* ignore trailing newline */
635 if ((len > 0) && (buf[len - 1] == '\n'))
638 if (ip_len > vmparm_max)
641 /* parm is used to store kernel options, check for common chars */
642 for (i = 0; i < ip_len; i++)
643 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
646 memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
647 ipb->ipl_info.ccw.vm_parm_len = ip_len;
649 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
650 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
651 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
653 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
660 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
661 struct kobj_attribute *attr, char *page)
663 return reipl_generic_vmparm_show(reipl_block_nss, page);
666 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
667 struct kobj_attribute *attr,
668 const char *buf, size_t len)
670 return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
674 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
675 struct kobj_attribute *attr, char *page)
677 return reipl_generic_vmparm_show(reipl_block_ccw, page);
680 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
681 struct kobj_attribute *attr,
682 const char *buf, size_t len)
684 return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
687 static struct kobj_attribute sys_reipl_nss_vmparm_attr =
688 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
689 reipl_nss_vmparm_store);
690 static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
691 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
692 reipl_ccw_vmparm_store);
694 /* FCP reipl device attributes */
696 static ssize_t reipl_fcp_scpdata_read(struct kobject *kobj,
697 struct bin_attribute *attr,
698 char *buf, loff_t off, size_t count)
700 size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
701 void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
703 return memory_read_from_buffer(buf, count, &off, scp_data, size);
706 static ssize_t reipl_fcp_scpdata_write(struct kobject *kobj,
707 struct bin_attribute *attr,
708 char *buf, loff_t off, size_t count)
716 if (off >= DIAG308_SCPDATA_SIZE)
719 if (count > DIAG308_SCPDATA_SIZE - off)
720 count = DIAG308_SCPDATA_SIZE - off;
722 memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf + off, count);
723 scpdata_len = off + count;
725 if (scpdata_len % 8) {
726 padding = 8 - (scpdata_len % 8);
727 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
729 scpdata_len += padding;
732 reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
733 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
734 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
739 static struct bin_attribute sys_reipl_fcp_scp_data_attr = {
742 .mode = S_IRUGO | S_IWUSR,
745 .read = reipl_fcp_scpdata_read,
746 .write = reipl_fcp_scpdata_write,
749 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n",
750 reipl_block_fcp->ipl_info.fcp.wwpn);
751 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n",
752 reipl_block_fcp->ipl_info.fcp.lun);
753 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
754 reipl_block_fcp->ipl_info.fcp.bootprog);
755 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
756 reipl_block_fcp->ipl_info.fcp.br_lba);
757 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
758 reipl_block_fcp->ipl_info.fcp.devno);
760 static struct attribute *reipl_fcp_attrs[] = {
761 &sys_reipl_fcp_device_attr.attr,
762 &sys_reipl_fcp_wwpn_attr.attr,
763 &sys_reipl_fcp_lun_attr.attr,
764 &sys_reipl_fcp_bootprog_attr.attr,
765 &sys_reipl_fcp_br_lba_attr.attr,
769 static struct attribute_group reipl_fcp_attr_group = {
770 .attrs = reipl_fcp_attrs,
773 /* CCW reipl device attributes */
775 DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
776 reipl_block_ccw->ipl_info.ccw.devno);
778 static void reipl_get_ascii_loadparm(char *loadparm,
779 struct ipl_parameter_block *ibp)
781 memcpy(loadparm, ibp->ipl_info.ccw.load_parm, LOADPARM_LEN);
782 EBCASC(loadparm, LOADPARM_LEN);
783 loadparm[LOADPARM_LEN] = 0;
787 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
790 char buf[LOADPARM_LEN + 1];
792 reipl_get_ascii_loadparm(buf, ipb);
793 return sprintf(page, "%s\n", buf);
796 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
797 const char *buf, size_t len)
801 /* ignore trailing newline */
803 if ((len > 0) && (buf[len - 1] == '\n'))
805 /* loadparm can have max 8 characters and must not start with a blank */
806 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
808 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
809 for (i = 0; i < lp_len; i++) {
810 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
815 /* initialize loadparm with blanks */
816 memset(ipb->ipl_info.ccw.load_parm, ' ', LOADPARM_LEN);
817 /* copy and convert to ebcdic */
818 memcpy(ipb->ipl_info.ccw.load_parm, buf, lp_len);
819 ASCEBC(ipb->ipl_info.ccw.load_parm, LOADPARM_LEN);
824 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
825 struct kobj_attribute *attr, char *page)
827 return reipl_generic_loadparm_show(reipl_block_nss, page);
830 static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
831 struct kobj_attribute *attr,
832 const char *buf, size_t len)
834 return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
838 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
839 struct kobj_attribute *attr, char *page)
841 return reipl_generic_loadparm_show(reipl_block_ccw, page);
844 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
845 struct kobj_attribute *attr,
846 const char *buf, size_t len)
848 return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
851 static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
852 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
853 reipl_ccw_loadparm_store);
855 static struct attribute *reipl_ccw_attrs_vm[] = {
856 &sys_reipl_ccw_device_attr.attr,
857 &sys_reipl_ccw_loadparm_attr.attr,
858 &sys_reipl_ccw_vmparm_attr.attr,
862 static struct attribute *reipl_ccw_attrs_lpar[] = {
863 &sys_reipl_ccw_device_attr.attr,
864 &sys_reipl_ccw_loadparm_attr.attr,
868 static struct attribute_group reipl_ccw_attr_group_vm = {
870 .attrs = reipl_ccw_attrs_vm,
873 static struct attribute_group reipl_ccw_attr_group_lpar = {
875 .attrs = reipl_ccw_attrs_lpar,
879 /* NSS reipl device attributes */
880 static void reipl_get_ascii_nss_name(char *dst,
881 struct ipl_parameter_block *ipb)
883 memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
884 EBCASC(dst, NSS_NAME_SIZE);
885 dst[NSS_NAME_SIZE] = 0;
888 static ssize_t reipl_nss_name_show(struct kobject *kobj,
889 struct kobj_attribute *attr, char *page)
891 char nss_name[NSS_NAME_SIZE + 1] = {};
893 reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
894 return sprintf(page, "%s\n", nss_name);
897 static ssize_t reipl_nss_name_store(struct kobject *kobj,
898 struct kobj_attribute *attr,
899 const char *buf, size_t len)
903 /* ignore trailing newline */
905 if ((len > 0) && (buf[len - 1] == '\n'))
908 if (nss_len > NSS_NAME_SIZE)
911 memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
913 reipl_block_nss->ipl_info.ccw.vm_flags |=
914 DIAG308_VM_FLAGS_NSS_VALID;
915 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
916 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
917 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
919 reipl_block_nss->ipl_info.ccw.vm_flags &=
920 ~DIAG308_VM_FLAGS_NSS_VALID;
926 static struct kobj_attribute sys_reipl_nss_name_attr =
927 __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
928 reipl_nss_name_store);
930 static struct kobj_attribute sys_reipl_nss_loadparm_attr =
931 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
932 reipl_nss_loadparm_store);
934 static struct attribute *reipl_nss_attrs[] = {
935 &sys_reipl_nss_name_attr.attr,
936 &sys_reipl_nss_loadparm_attr.attr,
937 &sys_reipl_nss_vmparm_attr.attr,
941 static struct attribute_group reipl_nss_attr_group = {
943 .attrs = reipl_nss_attrs,
948 static int reipl_set_type(enum ipl_type type)
950 if (!(reipl_capabilities & type))
955 if (diag308_set_works)
956 reipl_method = REIPL_METHOD_CCW_DIAG;
957 else if (MACHINE_IS_VM)
958 reipl_method = REIPL_METHOD_CCW_VM;
960 reipl_method = REIPL_METHOD_CCW_CIO;
961 reipl_block_actual = reipl_block_ccw;
964 if (diag308_set_works)
965 reipl_method = REIPL_METHOD_FCP_RW_DIAG;
966 else if (MACHINE_IS_VM)
967 reipl_method = REIPL_METHOD_FCP_RO_VM;
969 reipl_method = REIPL_METHOD_FCP_RO_DIAG;
970 reipl_block_actual = reipl_block_fcp;
972 case IPL_TYPE_FCP_DUMP:
973 reipl_method = REIPL_METHOD_FCP_DUMP;
976 if (diag308_set_works)
977 reipl_method = REIPL_METHOD_NSS_DIAG;
979 reipl_method = REIPL_METHOD_NSS;
980 reipl_block_actual = reipl_block_nss;
982 case IPL_TYPE_UNKNOWN:
983 reipl_method = REIPL_METHOD_DEFAULT;
992 static ssize_t reipl_type_show(struct kobject *kobj,
993 struct kobj_attribute *attr, char *page)
995 return sprintf(page, "%s\n", ipl_type_str(reipl_type));
998 static ssize_t reipl_type_store(struct kobject *kobj,
999 struct kobj_attribute *attr,
1000 const char *buf, size_t len)
1004 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1005 rc = reipl_set_type(IPL_TYPE_CCW);
1006 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1007 rc = reipl_set_type(IPL_TYPE_FCP);
1008 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1009 rc = reipl_set_type(IPL_TYPE_NSS);
1010 return (rc != 0) ? rc : len;
1013 static struct kobj_attribute reipl_type_attr =
1014 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
1016 static struct kset *reipl_kset;
1017 static struct kset *reipl_fcp_kset;
1019 static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
1020 const enum ipl_method m)
1022 char loadparm[LOADPARM_LEN + 1] = {};
1023 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
1024 char nss_name[NSS_NAME_SIZE + 1] = {};
1027 reipl_get_ascii_loadparm(loadparm, ipb);
1028 reipl_get_ascii_nss_name(nss_name, ipb);
1029 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
1032 case REIPL_METHOD_CCW_VM:
1033 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
1035 case REIPL_METHOD_NSS:
1036 pos = sprintf(dst, "IPL %s", nss_name);
1041 if (strlen(loadparm) > 0)
1042 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
1043 if (strlen(vmparm) > 0)
1044 sprintf(dst + pos, " PARM %s", vmparm);
1047 static void __reipl_run(void *unused)
1049 struct ccw_dev_id devid;
1050 static char buf[128];
1052 switch (reipl_method) {
1053 case REIPL_METHOD_CCW_CIO:
1054 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
1056 reipl_ccw_dev(&devid);
1058 case REIPL_METHOD_CCW_VM:
1059 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
1060 __cpcmd(buf, NULL, 0, NULL);
1062 case REIPL_METHOD_CCW_DIAG:
1063 diag308(DIAG308_SET, reipl_block_ccw);
1064 diag308(DIAG308_IPL, NULL);
1066 case REIPL_METHOD_FCP_RW_DIAG:
1067 diag308(DIAG308_SET, reipl_block_fcp);
1068 diag308(DIAG308_IPL, NULL);
1070 case REIPL_METHOD_FCP_RO_DIAG:
1071 diag308(DIAG308_IPL, NULL);
1073 case REIPL_METHOD_FCP_RO_VM:
1074 __cpcmd("IPL", NULL, 0, NULL);
1076 case REIPL_METHOD_NSS_DIAG:
1077 diag308(DIAG308_SET, reipl_block_nss);
1078 diag308(DIAG308_IPL, NULL);
1080 case REIPL_METHOD_NSS:
1081 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
1082 __cpcmd(buf, NULL, 0, NULL);
1084 case REIPL_METHOD_DEFAULT:
1086 __cpcmd("IPL", NULL, 0, NULL);
1087 diag308(DIAG308_IPL, NULL);
1089 case REIPL_METHOD_FCP_DUMP:
1092 disabled_wait((unsigned long) __builtin_return_address(0));
1095 static void reipl_run(struct shutdown_trigger *trigger)
1097 smp_switch_to_ipl_cpu(__reipl_run, NULL);
1100 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
1102 ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
1103 ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1104 ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1105 ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1108 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1111 /* check if read scp info worked and set loadparm */
1112 if (sclp_ipl_info.is_valid)
1113 memcpy(ipb->ipl_info.ccw.load_parm,
1114 &sclp_ipl_info.loadparm, LOADPARM_LEN);
1116 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1117 memset(ipb->ipl_info.ccw.load_parm, 0x40, LOADPARM_LEN);
1118 ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
1121 if (MACHINE_IS_VM && diag308_set_works &&
1122 (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1124 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1125 ipb->ipl_info.ccw.vm_parm_len =
1126 ipl_block.ipl_info.ccw.vm_parm_len;
1127 memcpy(ipb->ipl_info.ccw.vm_parm,
1128 ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1132 static int __init reipl_nss_init(void)
1139 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1140 if (!reipl_block_nss)
1143 if (!diag308_set_works)
1144 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO;
1146 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1150 reipl_block_ccw_init(reipl_block_nss);
1151 if (ipl_info.type == IPL_TYPE_NSS) {
1152 memset(reipl_block_nss->ipl_info.ccw.nss_name,
1153 ' ', NSS_NAME_SIZE);
1154 memcpy(reipl_block_nss->ipl_info.ccw.nss_name,
1155 kernel_nss_name, strlen(kernel_nss_name));
1156 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
1157 reipl_block_nss->ipl_info.ccw.vm_flags |=
1158 DIAG308_VM_FLAGS_NSS_VALID;
1160 reipl_block_ccw_fill_parms(reipl_block_nss);
1163 reipl_capabilities |= IPL_TYPE_NSS;
1167 static int __init reipl_ccw_init(void)
1171 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1172 if (!reipl_block_ccw)
1175 if (MACHINE_IS_VM) {
1176 if (!diag308_set_works)
1177 sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
1178 rc = sysfs_create_group(&reipl_kset->kobj,
1179 &reipl_ccw_attr_group_vm);
1181 if(!diag308_set_works)
1182 sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
1183 rc = sysfs_create_group(&reipl_kset->kobj,
1184 &reipl_ccw_attr_group_lpar);
1189 reipl_block_ccw_init(reipl_block_ccw);
1190 if (ipl_info.type == IPL_TYPE_CCW) {
1191 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
1192 reipl_block_ccw_fill_parms(reipl_block_ccw);
1195 reipl_capabilities |= IPL_TYPE_CCW;
1199 static int __init reipl_fcp_init(void)
1203 if (!diag308_set_works) {
1204 if (ipl_info.type == IPL_TYPE_FCP) {
1205 make_attrs_ro(reipl_fcp_attrs);
1206 sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO;
1211 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1212 if (!reipl_block_fcp)
1215 /* sysfs: create fcp kset for mixing attr group and bin attrs */
1216 reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1219 free_page((unsigned long) reipl_block_fcp);
1223 rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1225 kset_unregister(reipl_fcp_kset);
1226 free_page((unsigned long) reipl_block_fcp);
1230 rc = sysfs_create_bin_file(&reipl_fcp_kset->kobj,
1231 &sys_reipl_fcp_scp_data_attr);
1233 sysfs_remove_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1234 kset_unregister(reipl_fcp_kset);
1235 free_page((unsigned long) reipl_block_fcp);
1239 if (ipl_info.type == IPL_TYPE_FCP)
1240 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
1242 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1243 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1244 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1245 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1246 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1248 reipl_capabilities |= IPL_TYPE_FCP;
1252 static int __init reipl_init(void)
1256 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1259 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1261 kset_unregister(reipl_kset);
1264 rc = reipl_ccw_init();
1267 rc = reipl_fcp_init();
1270 rc = reipl_nss_init();
1273 rc = reipl_set_type(ipl_info.type);
1279 static struct shutdown_action __refdata reipl_action = {
1280 .name = SHUTDOWN_ACTION_REIPL_STR,
1286 * dump shutdown action: Dump Linux on shutdown.
1289 /* FCP dump device attributes */
1291 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n",
1292 dump_block_fcp->ipl_info.fcp.wwpn);
1293 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n",
1294 dump_block_fcp->ipl_info.fcp.lun);
1295 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1296 dump_block_fcp->ipl_info.fcp.bootprog);
1297 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1298 dump_block_fcp->ipl_info.fcp.br_lba);
1299 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1300 dump_block_fcp->ipl_info.fcp.devno);
1302 static struct attribute *dump_fcp_attrs[] = {
1303 &sys_dump_fcp_device_attr.attr,
1304 &sys_dump_fcp_wwpn_attr.attr,
1305 &sys_dump_fcp_lun_attr.attr,
1306 &sys_dump_fcp_bootprog_attr.attr,
1307 &sys_dump_fcp_br_lba_attr.attr,
1311 static struct attribute_group dump_fcp_attr_group = {
1312 .name = IPL_FCP_STR,
1313 .attrs = dump_fcp_attrs,
1316 /* CCW dump device attributes */
1318 DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
1319 dump_block_ccw->ipl_info.ccw.devno);
1321 static struct attribute *dump_ccw_attrs[] = {
1322 &sys_dump_ccw_device_attr.attr,
1326 static struct attribute_group dump_ccw_attr_group = {
1327 .name = IPL_CCW_STR,
1328 .attrs = dump_ccw_attrs,
1333 static int dump_set_type(enum dump_type type)
1335 if (!(dump_capabilities & type))
1339 if (diag308_set_works)
1340 dump_method = DUMP_METHOD_CCW_DIAG;
1341 else if (MACHINE_IS_VM)
1342 dump_method = DUMP_METHOD_CCW_VM;
1344 dump_method = DUMP_METHOD_CCW_CIO;
1347 dump_method = DUMP_METHOD_FCP_DIAG;
1350 dump_method = DUMP_METHOD_NONE;
1356 static ssize_t dump_type_show(struct kobject *kobj,
1357 struct kobj_attribute *attr, char *page)
1359 return sprintf(page, "%s\n", dump_type_str(dump_type));
1362 static ssize_t dump_type_store(struct kobject *kobj,
1363 struct kobj_attribute *attr,
1364 const char *buf, size_t len)
1368 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1369 rc = dump_set_type(DUMP_TYPE_NONE);
1370 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1371 rc = dump_set_type(DUMP_TYPE_CCW);
1372 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1373 rc = dump_set_type(DUMP_TYPE_FCP);
1374 return (rc != 0) ? rc : len;
1377 static struct kobj_attribute dump_type_attr =
1378 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1380 static struct kset *dump_kset;
1382 static void __dump_run(void *unused)
1384 struct ccw_dev_id devid;
1385 static char buf[100];
1387 switch (dump_method) {
1388 case DUMP_METHOD_CCW_CIO:
1389 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
1391 reipl_ccw_dev(&devid);
1393 case DUMP_METHOD_CCW_VM:
1394 sprintf(buf, "STORE STATUS");
1395 __cpcmd(buf, NULL, 0, NULL);
1396 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
1397 __cpcmd(buf, NULL, 0, NULL);
1399 case DUMP_METHOD_CCW_DIAG:
1400 diag308(DIAG308_SET, dump_block_ccw);
1401 diag308(DIAG308_DUMP, NULL);
1403 case DUMP_METHOD_FCP_DIAG:
1404 diag308(DIAG308_SET, dump_block_fcp);
1405 diag308(DIAG308_DUMP, NULL);
1412 static void dump_run(struct shutdown_trigger *trigger)
1414 if (dump_method == DUMP_METHOD_NONE)
1417 smp_switch_to_ipl_cpu(__dump_run, NULL);
1420 static int __init dump_ccw_init(void)
1424 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1425 if (!dump_block_ccw)
1427 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1429 free_page((unsigned long)dump_block_ccw);
1432 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1433 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1434 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1435 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1436 dump_capabilities |= DUMP_TYPE_CCW;
1440 static int __init dump_fcp_init(void)
1444 if (!sclp_ipl_info.has_dump)
1445 return 0; /* LDIPL DUMP is not installed */
1446 if (!diag308_set_works)
1448 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1449 if (!dump_block_fcp)
1451 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1453 free_page((unsigned long)dump_block_fcp);
1456 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1457 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1458 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1459 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1460 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1461 dump_capabilities |= DUMP_TYPE_FCP;
1465 static int __init dump_init(void)
1469 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1472 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1474 kset_unregister(dump_kset);
1477 rc = dump_ccw_init();
1480 rc = dump_fcp_init();
1483 dump_set_type(DUMP_TYPE_NONE);
1487 static struct shutdown_action __refdata dump_action = {
1488 .name = SHUTDOWN_ACTION_DUMP_STR,
1493 static void dump_reipl_run(struct shutdown_trigger *trigger)
1497 * Bypass dynamic address translation (DAT) when storing IPL parameter
1498 * information block address and checksum into the prefix area
1499 * (corresponding to absolute addresses 0-8191).
1500 * When enhanced DAT applies and the STE format control in one,
1501 * the absolute address is formed without prefixing. In this case a
1502 * normal store (stg/st) into the prefix area would no more match to
1503 * absolute addresses 0-8191.
1506 asm volatile("sturg %0,%1"
1507 :: "a" ((unsigned long) reipl_block_actual),
1508 "a" (&lowcore_ptr[smp_processor_id()]->ipib));
1510 asm volatile("stura %0,%1"
1511 :: "a" ((unsigned long) reipl_block_actual),
1512 "a" (&lowcore_ptr[smp_processor_id()]->ipib));
1514 asm volatile("stura %0,%1"
1515 :: "a" (csum_partial(reipl_block_actual,
1516 reipl_block_actual->hdr.len, 0)),
1517 "a" (&lowcore_ptr[smp_processor_id()]->ipib_checksum));
1522 static int __init dump_reipl_init(void)
1524 if (!diag308_set_works)
1530 static struct shutdown_action __refdata dump_reipl_action = {
1531 .name = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1532 .fn = dump_reipl_run,
1533 .init = dump_reipl_init,
1537 * vmcmd shutdown action: Trigger vm command on shutdown.
1540 static char vmcmd_on_reboot[128];
1541 static char vmcmd_on_panic[128];
1542 static char vmcmd_on_halt[128];
1543 static char vmcmd_on_poff[128];
1545 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1546 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1547 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1548 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1550 static struct attribute *vmcmd_attrs[] = {
1551 &sys_vmcmd_on_reboot_attr.attr,
1552 &sys_vmcmd_on_panic_attr.attr,
1553 &sys_vmcmd_on_halt_attr.attr,
1554 &sys_vmcmd_on_poff_attr.attr,
1558 static struct attribute_group vmcmd_attr_group = {
1559 .attrs = vmcmd_attrs,
1562 static struct kset *vmcmd_kset;
1564 static void vmcmd_run(struct shutdown_trigger *trigger)
1566 char *cmd, *next_cmd;
1568 if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1569 cmd = vmcmd_on_reboot;
1570 else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1571 cmd = vmcmd_on_panic;
1572 else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1573 cmd = vmcmd_on_halt;
1574 else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1575 cmd = vmcmd_on_poff;
1579 if (strlen(cmd) == 0)
1582 next_cmd = strchr(cmd, '\n');
1587 __cpcmd(cmd, NULL, 0, NULL);
1589 } while (cmd != NULL);
1592 static int vmcmd_init(void)
1596 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1599 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1602 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1603 vmcmd_run, vmcmd_init};
1606 * stop shutdown action: Stop Linux on shutdown.
1609 static void stop_run(struct shutdown_trigger *trigger)
1611 if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1612 disabled_wait((unsigned long) __builtin_return_address(0));
1613 while (signal_processor(smp_processor_id(), sigp_stop) == sigp_busy)
1618 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1623 static struct shutdown_action *shutdown_actions_list[] = {
1624 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1625 &vmcmd_action, &stop_action};
1626 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1632 static struct kset *shutdown_actions_kset;
1634 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1639 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1640 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1641 if (shutdown_actions_list[i]->init_rc) {
1642 return shutdown_actions_list[i]->init_rc;
1644 trigger->action = shutdown_actions_list[i];
1654 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1657 static ssize_t on_reboot_show(struct kobject *kobj,
1658 struct kobj_attribute *attr, char *page)
1660 return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1663 static ssize_t on_reboot_store(struct kobject *kobj,
1664 struct kobj_attribute *attr,
1665 const char *buf, size_t len)
1667 return set_trigger(buf, &on_reboot_trigger, len);
1670 static struct kobj_attribute on_reboot_attr =
1671 __ATTR(on_reboot, 0644, on_reboot_show, on_reboot_store);
1673 static void do_machine_restart(char *__unused)
1676 on_reboot_trigger.action->fn(&on_reboot_trigger);
1679 void (*_machine_restart)(char *command) = do_machine_restart;
1683 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1685 static ssize_t on_panic_show(struct kobject *kobj,
1686 struct kobj_attribute *attr, char *page)
1688 return sprintf(page, "%s\n", on_panic_trigger.action->name);
1691 static ssize_t on_panic_store(struct kobject *kobj,
1692 struct kobj_attribute *attr,
1693 const char *buf, size_t len)
1695 return set_trigger(buf, &on_panic_trigger, len);
1698 static struct kobj_attribute on_panic_attr =
1699 __ATTR(on_panic, 0644, on_panic_show, on_panic_store);
1701 static void do_panic(void)
1703 on_panic_trigger.action->fn(&on_panic_trigger);
1704 stop_run(&on_panic_trigger);
1709 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1711 static ssize_t on_halt_show(struct kobject *kobj,
1712 struct kobj_attribute *attr, char *page)
1714 return sprintf(page, "%s\n", on_halt_trigger.action->name);
1717 static ssize_t on_halt_store(struct kobject *kobj,
1718 struct kobj_attribute *attr,
1719 const char *buf, size_t len)
1721 return set_trigger(buf, &on_halt_trigger, len);
1724 static struct kobj_attribute on_halt_attr =
1725 __ATTR(on_halt, 0644, on_halt_show, on_halt_store);
1728 static void do_machine_halt(void)
1731 on_halt_trigger.action->fn(&on_halt_trigger);
1732 stop_run(&on_halt_trigger);
1734 void (*_machine_halt)(void) = do_machine_halt;
1738 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1740 static ssize_t on_poff_show(struct kobject *kobj,
1741 struct kobj_attribute *attr, char *page)
1743 return sprintf(page, "%s\n", on_poff_trigger.action->name);
1746 static ssize_t on_poff_store(struct kobject *kobj,
1747 struct kobj_attribute *attr,
1748 const char *buf, size_t len)
1750 return set_trigger(buf, &on_poff_trigger, len);
1753 static struct kobj_attribute on_poff_attr =
1754 __ATTR(on_poff, 0644, on_poff_show, on_poff_store);
1757 static void do_machine_power_off(void)
1760 on_poff_trigger.action->fn(&on_poff_trigger);
1761 stop_run(&on_poff_trigger);
1763 void (*_machine_power_off)(void) = do_machine_power_off;
1765 static void __init shutdown_triggers_init(void)
1767 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1769 if (!shutdown_actions_kset)
1771 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1772 &on_reboot_attr.attr))
1774 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1775 &on_panic_attr.attr))
1777 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1778 &on_halt_attr.attr))
1780 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1781 &on_poff_attr.attr))
1786 panic("shutdown_triggers_init failed\n");
1789 static void __init shutdown_actions_init(void)
1793 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1794 if (!shutdown_actions_list[i]->init)
1796 shutdown_actions_list[i]->init_rc =
1797 shutdown_actions_list[i]->init();
1801 static int __init s390_ipl_init(void)
1803 sclp_get_ipl_info(&sclp_ipl_info);
1804 shutdown_actions_init();
1805 shutdown_triggers_init();
1809 __initcall(s390_ipl_init);
1811 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1816 for (sx = 0; src[sx] != 0; sx++) {
1819 dst[dx++] = src[sx];
1825 static int __init vmcmd_on_reboot_setup(char *str)
1829 strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1830 vmcmd_on_reboot[127] = 0;
1831 on_reboot_trigger.action = &vmcmd_action;
1834 __setup("vmreboot=", vmcmd_on_reboot_setup);
1836 static int __init vmcmd_on_panic_setup(char *str)
1840 strncpy_skip_quote(vmcmd_on_panic, str, 127);
1841 vmcmd_on_panic[127] = 0;
1842 on_panic_trigger.action = &vmcmd_action;
1845 __setup("vmpanic=", vmcmd_on_panic_setup);
1847 static int __init vmcmd_on_halt_setup(char *str)
1851 strncpy_skip_quote(vmcmd_on_halt, str, 127);
1852 vmcmd_on_halt[127] = 0;
1853 on_halt_trigger.action = &vmcmd_action;
1856 __setup("vmhalt=", vmcmd_on_halt_setup);
1858 static int __init vmcmd_on_poff_setup(char *str)
1862 strncpy_skip_quote(vmcmd_on_poff, str, 127);
1863 vmcmd_on_poff[127] = 0;
1864 on_poff_trigger.action = &vmcmd_action;
1867 __setup("vmpoff=", vmcmd_on_poff_setup);
1869 static int on_panic_notify(struct notifier_block *self,
1870 unsigned long event, void *data)
1876 static struct notifier_block on_panic_nb = {
1877 .notifier_call = on_panic_notify,
1878 .priority = INT_MIN,
1881 void __init setup_ipl(void)
1883 ipl_info.type = get_ipl_type();
1884 switch (ipl_info.type) {
1886 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1887 ipl_info.data.ccw.dev_id.ssid = 0;
1890 case IPL_TYPE_FCP_DUMP:
1891 ipl_info.data.fcp.dev_id.devno =
1892 IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1893 ipl_info.data.fcp.dev_id.ssid = 0;
1894 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1895 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1898 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1899 sizeof(ipl_info.data.nss.name));
1901 case IPL_TYPE_UNKNOWN:
1902 /* We have no info to copy */
1905 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1908 void __init ipl_update_parameters(void)
1912 rc = diag308(DIAG308_STORE, &ipl_block);
1913 if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
1914 diag308_set_works = 1;
1917 void __init ipl_save_parameters(void)
1919 struct cio_iplinfo iplinfo;
1920 unsigned int *ipl_ptr;
1923 if (cio_get_iplinfo(&iplinfo))
1926 ipl_devno = iplinfo.devno;
1927 ipl_flags |= IPL_DEVNO_VALID;
1928 if (!iplinfo.is_qdio)
1930 ipl_flags |= IPL_PARMBLOCK_VALID;
1931 ipl_ptr = (unsigned int *)__LC_IPL_PARMBLOCK_PTR;
1932 src = (void *)(unsigned long)*ipl_ptr;
1933 dst = (void *)IPL_PARMBLOCK_ORIGIN;
1934 memmove(dst, src, PAGE_SIZE);
1935 *ipl_ptr = IPL_PARMBLOCK_ORIGIN;
1938 static LIST_HEAD(rcall);
1939 static DEFINE_MUTEX(rcall_mutex);
1941 void register_reset_call(struct reset_call *reset)
1943 mutex_lock(&rcall_mutex);
1944 list_add(&reset->list, &rcall);
1945 mutex_unlock(&rcall_mutex);
1947 EXPORT_SYMBOL_GPL(register_reset_call);
1949 void unregister_reset_call(struct reset_call *reset)
1951 mutex_lock(&rcall_mutex);
1952 list_del(&reset->list);
1953 mutex_unlock(&rcall_mutex);
1955 EXPORT_SYMBOL_GPL(unregister_reset_call);
1957 static void do_reset_calls(void)
1959 struct reset_call *reset;
1961 list_for_each_entry(reset, &rcall, list)
1965 u32 dump_prefix_page;
1967 void s390_reset_system(void)
1969 struct _lowcore *lc;
1971 lc = (struct _lowcore *)(unsigned long) store_prefix();
1973 /* Stack for interrupt/machine check handler */
1974 lc->panic_stack = S390_lowcore.panic_stack;
1976 /* Save prefix page address for dump case */
1977 dump_prefix_page = (u32)(unsigned long) lc;
1979 /* Disable prefixing */
1982 /* Disable lowcore protection */
1983 __ctl_clear_bit(0,28);
1985 /* Set new machine check handler */
1986 S390_lowcore.mcck_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
1987 S390_lowcore.mcck_new_psw.addr =
1988 PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;
1990 /* Set new program check handler */
1991 S390_lowcore.program_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
1992 S390_lowcore.program_new_psw.addr =
1993 PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;