2 * ipl/reipl/dump support for Linux on s390.
4 * Copyright IBM Corp. 2005, 2012
5 * Author(s): Michael Holzheu <holzheu@de.ibm.com>
6 * Heiko Carstens <heiko.carstens@de.ibm.com>
7 * Volker Sameske <sameske@de.ibm.com>
10 #include <linux/types.h>
11 #include <linux/export.h>
12 #include <linux/init.h>
13 #include <linux/device.h>
14 #include <linux/delay.h>
15 #include <linux/reboot.h>
16 #include <linux/ctype.h>
18 #include <linux/gfp.h>
19 #include <linux/crash_dump.h>
20 #include <linux/debug_locks.h>
24 #include <asm/setup.h>
25 #include <asm/cpcmd.h>
27 #include <asm/ebcdic.h>
28 #include <asm/reset.h>
30 #include <asm/checksum.h>
31 #include <asm/debug.h>
32 #include <asm/os_info.h>
35 #define IPL_PARM_BLOCK_VERSION 0
37 #define IPL_UNKNOWN_STR "unknown"
38 #define IPL_CCW_STR "ccw"
39 #define IPL_FCP_STR "fcp"
40 #define IPL_FCP_DUMP_STR "fcp_dump"
41 #define IPL_NSS_STR "nss"
43 #define DUMP_CCW_STR "ccw"
44 #define DUMP_FCP_STR "fcp"
45 #define DUMP_NONE_STR "none"
48 * Four shutdown trigger types are supported:
55 #define ON_PANIC_STR "on_panic"
56 #define ON_HALT_STR "on_halt"
57 #define ON_POFF_STR "on_poff"
58 #define ON_REIPL_STR "on_reboot"
59 #define ON_RESTART_STR "on_restart"
61 struct shutdown_action;
62 struct shutdown_trigger {
64 struct shutdown_action *action;
68 * The following shutdown action types are supported:
70 #define SHUTDOWN_ACTION_IPL_STR "ipl"
71 #define SHUTDOWN_ACTION_REIPL_STR "reipl"
72 #define SHUTDOWN_ACTION_DUMP_STR "dump"
73 #define SHUTDOWN_ACTION_VMCMD_STR "vmcmd"
74 #define SHUTDOWN_ACTION_STOP_STR "stop"
75 #define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl"
77 struct shutdown_action {
79 void (*fn) (struct shutdown_trigger *trigger);
84 static char *ipl_type_str(enum ipl_type type)
91 case IPL_TYPE_FCP_DUMP:
92 return IPL_FCP_DUMP_STR;
95 case IPL_TYPE_UNKNOWN:
97 return IPL_UNKNOWN_STR;
107 static char *dump_type_str(enum dump_type type)
111 return DUMP_NONE_STR;
122 * Must be in data section since the bss section
123 * is not cleared when these are accessed.
125 static u8 ipl_ssid __section(.data) = 0;
126 static u16 ipl_devno __section(.data) = 0;
127 u32 ipl_flags __section(.data) = 0;
130 REIPL_METHOD_CCW_CIO,
131 REIPL_METHOD_CCW_DIAG,
133 REIPL_METHOD_FCP_RO_DIAG,
134 REIPL_METHOD_FCP_RW_DIAG,
135 REIPL_METHOD_FCP_RO_VM,
136 REIPL_METHOD_FCP_DUMP,
138 REIPL_METHOD_NSS_DIAG,
139 REIPL_METHOD_DEFAULT,
145 DUMP_METHOD_CCW_DIAG,
147 DUMP_METHOD_FCP_DIAG,
150 static int diag308_set_works = 0;
152 static struct ipl_parameter_block ipl_block;
154 static int reipl_capabilities = IPL_TYPE_UNKNOWN;
156 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
157 static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
158 static struct ipl_parameter_block *reipl_block_fcp;
159 static struct ipl_parameter_block *reipl_block_ccw;
160 static struct ipl_parameter_block *reipl_block_nss;
161 static struct ipl_parameter_block *reipl_block_actual;
163 static int dump_capabilities = DUMP_TYPE_NONE;
164 static enum dump_type dump_type = DUMP_TYPE_NONE;
165 static enum dump_method dump_method = DUMP_METHOD_NONE;
166 static struct ipl_parameter_block *dump_block_fcp;
167 static struct ipl_parameter_block *dump_block_ccw;
169 static struct sclp_ipl_info sclp_ipl_info;
171 static inline int __diag308(unsigned long subcode, void *addr)
173 register unsigned long _addr asm("0") = (unsigned long) addr;
174 register unsigned long _rc asm("1") = 0;
177 " diag %0,%2,0x308\n"
180 : "+d" (_addr), "+d" (_rc)
181 : "d" (subcode) : "cc", "memory");
185 int diag308(unsigned long subcode, void *addr)
187 diag_stat_inc(DIAG_STAT_X308);
188 return __diag308(subcode, addr);
190 EXPORT_SYMBOL_GPL(diag308);
194 #define IPL_ATTR_SHOW_FN(_prefix, _name, _format, args...) \
195 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
196 struct kobj_attribute *attr, \
199 return snprintf(page, PAGE_SIZE, _format, ##args); \
202 #define IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk) \
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 ssid, devno; \
209 if (sscanf(buf, "0.%llx.%llx\n", &ssid, &devno) != 2) \
212 if (ssid > __MAX_SSID || devno > __MAX_SUBCHANNEL) \
215 _ipl_blk.ssid = ssid; \
216 _ipl_blk.devno = devno; \
220 #define DEFINE_IPL_CCW_ATTR_RW(_prefix, _name, _ipl_blk) \
221 IPL_ATTR_SHOW_FN(_prefix, _name, "0.%x.%04x\n", \
222 _ipl_blk.ssid, _ipl_blk.devno); \
223 IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk); \
224 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
225 __ATTR(_name, (S_IRUGO | S_IWUSR), \
226 sys_##_prefix##_##_name##_show, \
227 sys_##_prefix##_##_name##_store) \
229 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
230 IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value) \
231 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
232 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL)
234 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
235 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value) \
236 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
237 struct kobj_attribute *attr, \
238 const char *buf, size_t len) \
240 unsigned long long value; \
241 if (sscanf(buf, _fmt_in, &value) != 1) \
246 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
247 __ATTR(_name,(S_IRUGO | S_IWUSR), \
248 sys_##_prefix##_##_name##_show, \
249 sys_##_prefix##_##_name##_store)
251 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
252 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, _value) \
253 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
254 struct kobj_attribute *attr, \
255 const char *buf, size_t len) \
257 strncpy(_value, buf, sizeof(_value) - 1); \
261 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
262 __ATTR(_name,(S_IRUGO | S_IWUSR), \
263 sys_##_prefix##_##_name##_show, \
264 sys_##_prefix##_##_name##_store)
266 static void make_attrs_ro(struct attribute **attrs)
269 (*attrs)->mode = S_IRUGO;
278 static __init enum ipl_type get_ipl_type(void)
280 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
282 if (ipl_flags & IPL_NSS_VALID)
284 if (!(ipl_flags & IPL_DEVNO_VALID))
285 return IPL_TYPE_UNKNOWN;
286 if (!(ipl_flags & IPL_PARMBLOCK_VALID))
288 if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
289 return IPL_TYPE_UNKNOWN;
290 if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
291 return IPL_TYPE_UNKNOWN;
292 if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
293 return IPL_TYPE_FCP_DUMP;
297 struct ipl_info ipl_info;
298 EXPORT_SYMBOL_GPL(ipl_info);
300 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
303 return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
306 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
308 /* VM IPL PARM routines */
309 static size_t reipl_get_ascii_vmparm(char *dest, size_t size,
310 const struct ipl_parameter_block *ipb)
314 char has_lowercase = 0;
317 if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
318 (ipb->ipl_info.ccw.vm_parm_len > 0)) {
320 len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
321 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
322 /* If at least one character is lowercase, we assume mixed
323 * case; otherwise we convert everything to lowercase.
325 for (i = 0; i < len; i++)
326 if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
327 (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
328 (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
333 EBC_TOLOWER(dest, len);
341 size_t append_ipl_vmparm(char *dest, size_t size)
346 if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
347 rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
353 static ssize_t ipl_vm_parm_show(struct kobject *kobj,
354 struct kobj_attribute *attr, char *page)
356 char parm[DIAG308_VMPARM_SIZE + 1] = {};
358 append_ipl_vmparm(parm, sizeof(parm));
359 return sprintf(page, "%s\n", parm);
362 static size_t scpdata_length(const char* buf, size_t count)
365 if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
372 static size_t reipl_append_ascii_scpdata(char *dest, size_t size,
373 const struct ipl_parameter_block *ipb)
379 count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data,
380 ipb->ipl_info.fcp.scp_data_len));
385 for (i = 0; i < count; i++) {
386 if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
390 if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
395 memcpy(dest, ipb->ipl_info.fcp.scp_data, count);
397 for (i = 0; i < count; i++)
398 dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]);
404 size_t append_ipl_scpdata(char *dest, size_t len)
409 if (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP)
410 rc = reipl_append_ascii_scpdata(dest, len, &ipl_block);
417 static struct kobj_attribute sys_ipl_vm_parm_attr =
418 __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
420 static ssize_t sys_ipl_device_show(struct kobject *kobj,
421 struct kobj_attribute *attr, char *page)
423 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
425 switch (ipl_info.type) {
427 return sprintf(page, "0.%x.%04x\n", ipl_ssid, ipl_devno);
429 case IPL_TYPE_FCP_DUMP:
430 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
436 static struct kobj_attribute sys_ipl_device_attr =
437 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
439 static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
440 struct bin_attribute *attr, char *buf,
441 loff_t off, size_t count)
443 return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START,
446 static struct bin_attribute ipl_parameter_attr =
447 __BIN_ATTR(binary_parameter, S_IRUGO, ipl_parameter_read, NULL,
450 static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
451 struct bin_attribute *attr, char *buf,
452 loff_t off, size_t count)
454 unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
455 void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
457 return memory_read_from_buffer(buf, count, &off, scp_data, size);
459 static struct bin_attribute ipl_scp_data_attr =
460 __BIN_ATTR(scp_data, S_IRUGO, ipl_scp_data_read, NULL, PAGE_SIZE);
462 static struct bin_attribute *ipl_fcp_bin_attrs[] = {
468 /* FCP ipl device attributes */
470 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
471 IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
472 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
473 IPL_PARMBLOCK_START->ipl_info.fcp.lun);
474 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
475 IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
476 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
477 IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
479 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
480 struct kobj_attribute *attr, char *page)
482 char loadparm[LOADPARM_LEN + 1] = {};
484 if (!sclp_ipl_info.is_valid)
485 return sprintf(page, "#unknown#\n");
486 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
487 EBCASC(loadparm, LOADPARM_LEN);
489 return sprintf(page, "%s\n", loadparm);
492 static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
493 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
495 static struct attribute *ipl_fcp_attrs[] = {
496 &sys_ipl_type_attr.attr,
497 &sys_ipl_device_attr.attr,
498 &sys_ipl_fcp_wwpn_attr.attr,
499 &sys_ipl_fcp_lun_attr.attr,
500 &sys_ipl_fcp_bootprog_attr.attr,
501 &sys_ipl_fcp_br_lba_attr.attr,
502 &sys_ipl_ccw_loadparm_attr.attr,
506 static struct attribute_group ipl_fcp_attr_group = {
507 .attrs = ipl_fcp_attrs,
508 .bin_attrs = ipl_fcp_bin_attrs,
511 /* CCW ipl device attributes */
513 static struct attribute *ipl_ccw_attrs_vm[] = {
514 &sys_ipl_type_attr.attr,
515 &sys_ipl_device_attr.attr,
516 &sys_ipl_ccw_loadparm_attr.attr,
517 &sys_ipl_vm_parm_attr.attr,
521 static struct attribute *ipl_ccw_attrs_lpar[] = {
522 &sys_ipl_type_attr.attr,
523 &sys_ipl_device_attr.attr,
524 &sys_ipl_ccw_loadparm_attr.attr,
528 static struct attribute_group ipl_ccw_attr_group_vm = {
529 .attrs = ipl_ccw_attrs_vm,
532 static struct attribute_group ipl_ccw_attr_group_lpar = {
533 .attrs = ipl_ccw_attrs_lpar
536 /* NSS ipl device attributes */
538 DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
540 static struct attribute *ipl_nss_attrs[] = {
541 &sys_ipl_type_attr.attr,
542 &sys_ipl_nss_name_attr.attr,
543 &sys_ipl_ccw_loadparm_attr.attr,
544 &sys_ipl_vm_parm_attr.attr,
548 static struct attribute_group ipl_nss_attr_group = {
549 .attrs = ipl_nss_attrs,
552 /* UNKNOWN ipl device attributes */
554 static struct attribute *ipl_unknown_attrs[] = {
555 &sys_ipl_type_attr.attr,
559 static struct attribute_group ipl_unknown_attr_group = {
560 .attrs = ipl_unknown_attrs,
563 static struct kset *ipl_kset;
565 static void __ipl_run(void *unused)
567 diag308(DIAG308_LOAD_CLEAR, NULL);
569 __cpcmd("IPL", NULL, 0, NULL);
570 else if (ipl_info.type == IPL_TYPE_CCW)
571 reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
574 static void ipl_run(struct shutdown_trigger *trigger)
576 smp_call_ipl_cpu(__ipl_run, NULL);
579 static int __init ipl_init(void)
583 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
588 switch (ipl_info.type) {
591 rc = sysfs_create_group(&ipl_kset->kobj,
592 &ipl_ccw_attr_group_vm);
594 rc = sysfs_create_group(&ipl_kset->kobj,
595 &ipl_ccw_attr_group_lpar);
598 case IPL_TYPE_FCP_DUMP:
599 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
602 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group);
605 rc = sysfs_create_group(&ipl_kset->kobj,
606 &ipl_unknown_attr_group);
611 panic("ipl_init failed: rc = %i\n", rc);
616 static struct shutdown_action __refdata ipl_action = {
617 .name = SHUTDOWN_ACTION_IPL_STR,
623 * reipl shutdown action: Reboot Linux on shutdown.
626 /* VM IPL PARM attributes */
627 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
630 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
632 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
633 return sprintf(page, "%s\n", vmparm);
636 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
638 const char *buf, size_t len)
642 /* ignore trailing newline */
644 if ((len > 0) && (buf[len - 1] == '\n'))
647 if (ip_len > vmparm_max)
650 /* parm is used to store kernel options, check for common chars */
651 for (i = 0; i < ip_len; i++)
652 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
655 memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
656 ipb->ipl_info.ccw.vm_parm_len = ip_len;
658 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
659 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
660 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
662 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
669 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
670 struct kobj_attribute *attr, char *page)
672 return reipl_generic_vmparm_show(reipl_block_nss, page);
675 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
676 struct kobj_attribute *attr,
677 const char *buf, size_t len)
679 return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
683 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
684 struct kobj_attribute *attr, char *page)
686 return reipl_generic_vmparm_show(reipl_block_ccw, page);
689 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
690 struct kobj_attribute *attr,
691 const char *buf, size_t len)
693 return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
696 static struct kobj_attribute sys_reipl_nss_vmparm_attr =
697 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
698 reipl_nss_vmparm_store);
699 static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
700 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
701 reipl_ccw_vmparm_store);
703 /* FCP reipl device attributes */
705 static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
706 struct bin_attribute *attr,
707 char *buf, loff_t off, size_t count)
709 size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
710 void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
712 return memory_read_from_buffer(buf, count, &off, scp_data, size);
715 static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
716 struct bin_attribute *attr,
717 char *buf, loff_t off, size_t count)
719 size_t scpdata_len = count;
726 memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf, count);
727 if (scpdata_len % 8) {
728 padding = 8 - (scpdata_len % 8);
729 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
731 scpdata_len += padding;
734 reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
735 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
736 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
740 static struct bin_attribute sys_reipl_fcp_scp_data_attr =
741 __BIN_ATTR(scp_data, (S_IRUGO | S_IWUSR), reipl_fcp_scpdata_read,
742 reipl_fcp_scpdata_write, DIAG308_SCPDATA_SIZE);
744 static struct bin_attribute *reipl_fcp_bin_attrs[] = {
745 &sys_reipl_fcp_scp_data_attr,
749 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n",
750 reipl_block_fcp->ipl_info.fcp.wwpn);
751 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\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 void reipl_get_ascii_loadparm(char *loadparm,
761 struct ipl_parameter_block *ibp)
763 memcpy(loadparm, ibp->hdr.loadparm, LOADPARM_LEN);
764 EBCASC(loadparm, LOADPARM_LEN);
765 loadparm[LOADPARM_LEN] = 0;
769 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
772 char buf[LOADPARM_LEN + 1];
774 reipl_get_ascii_loadparm(buf, ipb);
775 return sprintf(page, "%s\n", buf);
778 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
779 const char *buf, size_t len)
783 /* ignore trailing newline */
785 if ((len > 0) && (buf[len - 1] == '\n'))
787 /* loadparm can have max 8 characters and must not start with a blank */
788 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
790 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
791 for (i = 0; i < lp_len; i++) {
792 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
797 /* initialize loadparm with blanks */
798 memset(ipb->hdr.loadparm, ' ', LOADPARM_LEN);
799 /* copy and convert to ebcdic */
800 memcpy(ipb->hdr.loadparm, buf, lp_len);
801 ASCEBC(ipb->hdr.loadparm, LOADPARM_LEN);
806 static ssize_t reipl_fcp_loadparm_show(struct kobject *kobj,
807 struct kobj_attribute *attr, char *page)
809 return reipl_generic_loadparm_show(reipl_block_fcp, page);
812 static ssize_t reipl_fcp_loadparm_store(struct kobject *kobj,
813 struct kobj_attribute *attr,
814 const char *buf, size_t len)
816 return reipl_generic_loadparm_store(reipl_block_fcp, buf, len);
819 static struct kobj_attribute sys_reipl_fcp_loadparm_attr =
820 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_fcp_loadparm_show,
821 reipl_fcp_loadparm_store);
823 static struct attribute *reipl_fcp_attrs[] = {
824 &sys_reipl_fcp_device_attr.attr,
825 &sys_reipl_fcp_wwpn_attr.attr,
826 &sys_reipl_fcp_lun_attr.attr,
827 &sys_reipl_fcp_bootprog_attr.attr,
828 &sys_reipl_fcp_br_lba_attr.attr,
829 &sys_reipl_fcp_loadparm_attr.attr,
833 static struct attribute_group reipl_fcp_attr_group = {
834 .attrs = reipl_fcp_attrs,
835 .bin_attrs = reipl_fcp_bin_attrs,
838 /* CCW reipl device attributes */
839 DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ipl_info.ccw);
842 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
843 struct kobj_attribute *attr, char *page)
845 return reipl_generic_loadparm_show(reipl_block_nss, page);
848 static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
849 struct kobj_attribute *attr,
850 const char *buf, size_t len)
852 return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
856 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
857 struct kobj_attribute *attr, char *page)
859 return reipl_generic_loadparm_show(reipl_block_ccw, page);
862 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
863 struct kobj_attribute *attr,
864 const char *buf, size_t len)
866 return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
869 static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
870 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
871 reipl_ccw_loadparm_store);
873 static struct attribute *reipl_ccw_attrs_vm[] = {
874 &sys_reipl_ccw_device_attr.attr,
875 &sys_reipl_ccw_loadparm_attr.attr,
876 &sys_reipl_ccw_vmparm_attr.attr,
880 static struct attribute *reipl_ccw_attrs_lpar[] = {
881 &sys_reipl_ccw_device_attr.attr,
882 &sys_reipl_ccw_loadparm_attr.attr,
886 static struct attribute_group reipl_ccw_attr_group_vm = {
888 .attrs = reipl_ccw_attrs_vm,
891 static struct attribute_group reipl_ccw_attr_group_lpar = {
893 .attrs = reipl_ccw_attrs_lpar,
897 /* NSS reipl device attributes */
898 static void reipl_get_ascii_nss_name(char *dst,
899 struct ipl_parameter_block *ipb)
901 memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
902 EBCASC(dst, NSS_NAME_SIZE);
903 dst[NSS_NAME_SIZE] = 0;
906 static ssize_t reipl_nss_name_show(struct kobject *kobj,
907 struct kobj_attribute *attr, char *page)
909 char nss_name[NSS_NAME_SIZE + 1] = {};
911 reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
912 return sprintf(page, "%s\n", nss_name);
915 static ssize_t reipl_nss_name_store(struct kobject *kobj,
916 struct kobj_attribute *attr,
917 const char *buf, size_t len)
921 /* ignore trailing newline */
923 if ((len > 0) && (buf[len - 1] == '\n'))
926 if (nss_len > NSS_NAME_SIZE)
929 memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
931 reipl_block_nss->ipl_info.ccw.vm_flags |=
932 DIAG308_VM_FLAGS_NSS_VALID;
933 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
934 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
935 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
937 reipl_block_nss->ipl_info.ccw.vm_flags &=
938 ~DIAG308_VM_FLAGS_NSS_VALID;
944 static struct kobj_attribute sys_reipl_nss_name_attr =
945 __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
946 reipl_nss_name_store);
948 static struct kobj_attribute sys_reipl_nss_loadparm_attr =
949 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
950 reipl_nss_loadparm_store);
952 static struct attribute *reipl_nss_attrs[] = {
953 &sys_reipl_nss_name_attr.attr,
954 &sys_reipl_nss_loadparm_attr.attr,
955 &sys_reipl_nss_vmparm_attr.attr,
959 static struct attribute_group reipl_nss_attr_group = {
961 .attrs = reipl_nss_attrs,
964 static void set_reipl_block_actual(struct ipl_parameter_block *reipl_block)
966 reipl_block_actual = reipl_block;
967 os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual,
968 reipl_block->hdr.len);
973 static int reipl_set_type(enum ipl_type type)
975 if (!(reipl_capabilities & type))
980 if (diag308_set_works)
981 reipl_method = REIPL_METHOD_CCW_DIAG;
982 else if (MACHINE_IS_VM)
983 reipl_method = REIPL_METHOD_CCW_VM;
985 reipl_method = REIPL_METHOD_CCW_CIO;
986 set_reipl_block_actual(reipl_block_ccw);
989 if (diag308_set_works)
990 reipl_method = REIPL_METHOD_FCP_RW_DIAG;
991 else if (MACHINE_IS_VM)
992 reipl_method = REIPL_METHOD_FCP_RO_VM;
994 reipl_method = REIPL_METHOD_FCP_RO_DIAG;
995 set_reipl_block_actual(reipl_block_fcp);
997 case IPL_TYPE_FCP_DUMP:
998 reipl_method = REIPL_METHOD_FCP_DUMP;
1001 if (diag308_set_works)
1002 reipl_method = REIPL_METHOD_NSS_DIAG;
1004 reipl_method = REIPL_METHOD_NSS;
1005 set_reipl_block_actual(reipl_block_nss);
1007 case IPL_TYPE_UNKNOWN:
1008 reipl_method = REIPL_METHOD_DEFAULT;
1017 static ssize_t reipl_type_show(struct kobject *kobj,
1018 struct kobj_attribute *attr, char *page)
1020 return sprintf(page, "%s\n", ipl_type_str(reipl_type));
1023 static ssize_t reipl_type_store(struct kobject *kobj,
1024 struct kobj_attribute *attr,
1025 const char *buf, size_t len)
1029 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1030 rc = reipl_set_type(IPL_TYPE_CCW);
1031 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1032 rc = reipl_set_type(IPL_TYPE_FCP);
1033 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1034 rc = reipl_set_type(IPL_TYPE_NSS);
1035 return (rc != 0) ? rc : len;
1038 static struct kobj_attribute reipl_type_attr =
1039 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
1041 static struct kset *reipl_kset;
1042 static struct kset *reipl_fcp_kset;
1044 static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
1045 const enum ipl_method m)
1047 char loadparm[LOADPARM_LEN + 1] = {};
1048 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
1049 char nss_name[NSS_NAME_SIZE + 1] = {};
1052 reipl_get_ascii_loadparm(loadparm, ipb);
1053 reipl_get_ascii_nss_name(nss_name, ipb);
1054 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
1057 case REIPL_METHOD_CCW_VM:
1058 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
1060 case REIPL_METHOD_NSS:
1061 pos = sprintf(dst, "IPL %s", nss_name);
1066 if (strlen(loadparm) > 0)
1067 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
1068 if (strlen(vmparm) > 0)
1069 sprintf(dst + pos, " PARM %s", vmparm);
1072 static void __reipl_run(void *unused)
1074 struct ccw_dev_id devid;
1075 static char buf[128];
1077 switch (reipl_method) {
1078 case REIPL_METHOD_CCW_CIO:
1079 devid.ssid = reipl_block_ccw->ipl_info.ccw.ssid;
1080 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
1081 reipl_ccw_dev(&devid);
1083 case REIPL_METHOD_CCW_VM:
1084 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
1085 __cpcmd(buf, NULL, 0, NULL);
1087 case REIPL_METHOD_CCW_DIAG:
1088 diag308(DIAG308_SET, reipl_block_ccw);
1089 if (MACHINE_IS_LPAR)
1090 diag308(DIAG308_LOAD_NORMAL_DUMP, NULL);
1092 diag308(DIAG308_LOAD_CLEAR, NULL);
1094 case REIPL_METHOD_FCP_RW_DIAG:
1095 diag308(DIAG308_SET, reipl_block_fcp);
1096 diag308(DIAG308_LOAD_CLEAR, NULL);
1098 case REIPL_METHOD_FCP_RO_DIAG:
1099 diag308(DIAG308_LOAD_CLEAR, NULL);
1101 case REIPL_METHOD_FCP_RO_VM:
1102 __cpcmd("IPL", NULL, 0, NULL);
1104 case REIPL_METHOD_NSS_DIAG:
1105 diag308(DIAG308_SET, reipl_block_nss);
1106 diag308(DIAG308_LOAD_CLEAR, NULL);
1108 case REIPL_METHOD_NSS:
1109 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
1110 __cpcmd(buf, NULL, 0, NULL);
1112 case REIPL_METHOD_DEFAULT:
1114 __cpcmd("IPL", NULL, 0, NULL);
1115 diag308(DIAG308_LOAD_CLEAR, NULL);
1117 case REIPL_METHOD_FCP_DUMP:
1120 disabled_wait((unsigned long) __builtin_return_address(0));
1123 static void reipl_run(struct shutdown_trigger *trigger)
1125 smp_call_ipl_cpu(__reipl_run, NULL);
1128 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
1130 ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
1131 ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1132 ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1133 ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1136 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1139 /* check if read scp info worked and set loadparm */
1140 if (sclp_ipl_info.is_valid)
1141 memcpy(ipb->hdr.loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
1143 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1144 memset(ipb->hdr.loadparm, 0x40, LOADPARM_LEN);
1145 ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
1148 if (MACHINE_IS_VM && diag308_set_works &&
1149 (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1151 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1152 ipb->ipl_info.ccw.vm_parm_len =
1153 ipl_block.ipl_info.ccw.vm_parm_len;
1154 memcpy(ipb->ipl_info.ccw.vm_parm,
1155 ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1159 static int __init reipl_nss_init(void)
1166 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1167 if (!reipl_block_nss)
1170 if (!diag308_set_works)
1171 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO;
1173 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1177 reipl_block_ccw_init(reipl_block_nss);
1178 if (ipl_info.type == IPL_TYPE_NSS) {
1179 memset(reipl_block_nss->ipl_info.ccw.nss_name,
1180 ' ', NSS_NAME_SIZE);
1181 memcpy(reipl_block_nss->ipl_info.ccw.nss_name,
1182 kernel_nss_name, strlen(kernel_nss_name));
1183 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
1184 reipl_block_nss->ipl_info.ccw.vm_flags |=
1185 DIAG308_VM_FLAGS_NSS_VALID;
1187 reipl_block_ccw_fill_parms(reipl_block_nss);
1190 reipl_capabilities |= IPL_TYPE_NSS;
1194 static int __init reipl_ccw_init(void)
1198 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1199 if (!reipl_block_ccw)
1202 if (MACHINE_IS_VM) {
1203 if (!diag308_set_works)
1204 sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
1205 rc = sysfs_create_group(&reipl_kset->kobj,
1206 &reipl_ccw_attr_group_vm);
1208 if(!diag308_set_works)
1209 sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
1210 rc = sysfs_create_group(&reipl_kset->kobj,
1211 &reipl_ccw_attr_group_lpar);
1216 reipl_block_ccw_init(reipl_block_ccw);
1217 if (ipl_info.type == IPL_TYPE_CCW) {
1218 reipl_block_ccw->ipl_info.ccw.ssid = ipl_ssid;
1219 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
1220 reipl_block_ccw_fill_parms(reipl_block_ccw);
1223 reipl_capabilities |= IPL_TYPE_CCW;
1227 static int __init reipl_fcp_init(void)
1231 if (!diag308_set_works) {
1232 if (ipl_info.type == IPL_TYPE_FCP) {
1233 make_attrs_ro(reipl_fcp_attrs);
1234 sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO;
1239 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1240 if (!reipl_block_fcp)
1243 /* sysfs: create fcp kset for mixing attr group and bin attrs */
1244 reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1246 if (!reipl_fcp_kset) {
1247 free_page((unsigned long) reipl_block_fcp);
1251 rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1253 kset_unregister(reipl_fcp_kset);
1254 free_page((unsigned long) reipl_block_fcp);
1258 if (ipl_info.type == IPL_TYPE_FCP) {
1259 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
1261 * Fix loadparm: There are systems where the (SCSI) LOADPARM
1262 * is invalid in the SCSI IPL parameter block, so take it
1263 * always from sclp_ipl_info.
1265 memcpy(reipl_block_fcp->hdr.loadparm, sclp_ipl_info.loadparm,
1268 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1269 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1270 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1271 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1272 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1274 reipl_capabilities |= IPL_TYPE_FCP;
1278 static int __init reipl_type_init(void)
1280 enum ipl_type reipl_type = ipl_info.type;
1281 struct ipl_parameter_block *reipl_block;
1284 reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size);
1288 * If we have an OS info reipl block, this will be used
1290 if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_FCP) {
1291 memcpy(reipl_block_fcp, reipl_block, size);
1292 reipl_type = IPL_TYPE_FCP;
1293 } else if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_CCW) {
1294 memcpy(reipl_block_ccw, reipl_block, size);
1295 reipl_type = IPL_TYPE_CCW;
1298 return reipl_set_type(reipl_type);
1301 static int __init reipl_init(void)
1305 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1308 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1310 kset_unregister(reipl_kset);
1313 rc = reipl_ccw_init();
1316 rc = reipl_fcp_init();
1319 rc = reipl_nss_init();
1322 return reipl_type_init();
1325 static struct shutdown_action __refdata reipl_action = {
1326 .name = SHUTDOWN_ACTION_REIPL_STR,
1332 * dump shutdown action: Dump Linux on shutdown.
1335 /* FCP dump device attributes */
1337 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n",
1338 dump_block_fcp->ipl_info.fcp.wwpn);
1339 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n",
1340 dump_block_fcp->ipl_info.fcp.lun);
1341 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1342 dump_block_fcp->ipl_info.fcp.bootprog);
1343 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1344 dump_block_fcp->ipl_info.fcp.br_lba);
1345 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1346 dump_block_fcp->ipl_info.fcp.devno);
1348 static struct attribute *dump_fcp_attrs[] = {
1349 &sys_dump_fcp_device_attr.attr,
1350 &sys_dump_fcp_wwpn_attr.attr,
1351 &sys_dump_fcp_lun_attr.attr,
1352 &sys_dump_fcp_bootprog_attr.attr,
1353 &sys_dump_fcp_br_lba_attr.attr,
1357 static struct attribute_group dump_fcp_attr_group = {
1358 .name = IPL_FCP_STR,
1359 .attrs = dump_fcp_attrs,
1362 /* CCW dump device attributes */
1363 DEFINE_IPL_CCW_ATTR_RW(dump_ccw, device, dump_block_ccw->ipl_info.ccw);
1365 static struct attribute *dump_ccw_attrs[] = {
1366 &sys_dump_ccw_device_attr.attr,
1370 static struct attribute_group dump_ccw_attr_group = {
1371 .name = IPL_CCW_STR,
1372 .attrs = dump_ccw_attrs,
1377 static int dump_set_type(enum dump_type type)
1379 if (!(dump_capabilities & type))
1383 if (diag308_set_works)
1384 dump_method = DUMP_METHOD_CCW_DIAG;
1385 else if (MACHINE_IS_VM)
1386 dump_method = DUMP_METHOD_CCW_VM;
1388 dump_method = DUMP_METHOD_CCW_CIO;
1391 dump_method = DUMP_METHOD_FCP_DIAG;
1394 dump_method = DUMP_METHOD_NONE;
1400 static ssize_t dump_type_show(struct kobject *kobj,
1401 struct kobj_attribute *attr, char *page)
1403 return sprintf(page, "%s\n", dump_type_str(dump_type));
1406 static ssize_t dump_type_store(struct kobject *kobj,
1407 struct kobj_attribute *attr,
1408 const char *buf, size_t len)
1412 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1413 rc = dump_set_type(DUMP_TYPE_NONE);
1414 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1415 rc = dump_set_type(DUMP_TYPE_CCW);
1416 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1417 rc = dump_set_type(DUMP_TYPE_FCP);
1418 return (rc != 0) ? rc : len;
1421 static struct kobj_attribute dump_type_attr =
1422 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1424 static struct kset *dump_kset;
1426 static void diag308_dump(void *dump_block)
1428 diag308(DIAG308_SET, dump_block);
1430 if (diag308(DIAG308_LOAD_NORMAL_DUMP, NULL) != 0x302)
1432 udelay_simple(USEC_PER_SEC);
1436 static void __dump_run(void *unused)
1438 struct ccw_dev_id devid;
1439 static char buf[100];
1441 switch (dump_method) {
1442 case DUMP_METHOD_CCW_CIO:
1443 devid.ssid = dump_block_ccw->ipl_info.ccw.ssid;
1444 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
1445 reipl_ccw_dev(&devid);
1447 case DUMP_METHOD_CCW_VM:
1448 sprintf(buf, "STORE STATUS");
1449 __cpcmd(buf, NULL, 0, NULL);
1450 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
1451 __cpcmd(buf, NULL, 0, NULL);
1453 case DUMP_METHOD_CCW_DIAG:
1454 diag308_dump(dump_block_ccw);
1456 case DUMP_METHOD_FCP_DIAG:
1457 diag308_dump(dump_block_fcp);
1464 static void dump_run(struct shutdown_trigger *trigger)
1466 if (dump_method == DUMP_METHOD_NONE)
1469 smp_call_ipl_cpu(__dump_run, NULL);
1472 static int __init dump_ccw_init(void)
1476 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1477 if (!dump_block_ccw)
1479 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1481 free_page((unsigned long)dump_block_ccw);
1484 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1485 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1486 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1487 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1488 dump_capabilities |= DUMP_TYPE_CCW;
1492 static int __init dump_fcp_init(void)
1496 if (!sclp_ipl_info.has_dump)
1497 return 0; /* LDIPL DUMP is not installed */
1498 if (!diag308_set_works)
1500 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1501 if (!dump_block_fcp)
1503 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1505 free_page((unsigned long)dump_block_fcp);
1508 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1509 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1510 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1511 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1512 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1513 dump_capabilities |= DUMP_TYPE_FCP;
1517 static int __init dump_init(void)
1521 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1524 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1526 kset_unregister(dump_kset);
1529 rc = dump_ccw_init();
1532 rc = dump_fcp_init();
1535 dump_set_type(DUMP_TYPE_NONE);
1539 static struct shutdown_action __refdata dump_action = {
1540 .name = SHUTDOWN_ACTION_DUMP_STR,
1545 static void dump_reipl_run(struct shutdown_trigger *trigger)
1547 unsigned long ipib = (unsigned long) reipl_block_actual;
1550 csum = (__force unsigned int)
1551 csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
1552 mem_assign_absolute(S390_lowcore.ipib, ipib);
1553 mem_assign_absolute(S390_lowcore.ipib_checksum, csum);
1557 static int __init dump_reipl_init(void)
1559 if (!diag308_set_works)
1565 static struct shutdown_action __refdata dump_reipl_action = {
1566 .name = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1567 .fn = dump_reipl_run,
1568 .init = dump_reipl_init,
1572 * vmcmd shutdown action: Trigger vm command on shutdown.
1575 static char vmcmd_on_reboot[128];
1576 static char vmcmd_on_panic[128];
1577 static char vmcmd_on_halt[128];
1578 static char vmcmd_on_poff[128];
1579 static char vmcmd_on_restart[128];
1581 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1582 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1583 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1584 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1585 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1587 static struct attribute *vmcmd_attrs[] = {
1588 &sys_vmcmd_on_reboot_attr.attr,
1589 &sys_vmcmd_on_panic_attr.attr,
1590 &sys_vmcmd_on_halt_attr.attr,
1591 &sys_vmcmd_on_poff_attr.attr,
1592 &sys_vmcmd_on_restart_attr.attr,
1596 static struct attribute_group vmcmd_attr_group = {
1597 .attrs = vmcmd_attrs,
1600 static struct kset *vmcmd_kset;
1602 static void vmcmd_run(struct shutdown_trigger *trigger)
1606 if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1607 cmd = vmcmd_on_reboot;
1608 else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1609 cmd = vmcmd_on_panic;
1610 else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1611 cmd = vmcmd_on_halt;
1612 else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1613 cmd = vmcmd_on_poff;
1614 else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
1615 cmd = vmcmd_on_restart;
1619 if (strlen(cmd) == 0)
1621 __cpcmd(cmd, NULL, 0, NULL);
1624 static int vmcmd_init(void)
1628 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1631 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1634 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1635 vmcmd_run, vmcmd_init};
1638 * stop shutdown action: Stop Linux on shutdown.
1641 static void stop_run(struct shutdown_trigger *trigger)
1643 if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
1644 strcmp(trigger->name, ON_RESTART_STR) == 0)
1645 disabled_wait((unsigned long) __builtin_return_address(0));
1649 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1654 static struct shutdown_action *shutdown_actions_list[] = {
1655 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1656 &vmcmd_action, &stop_action};
1657 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1663 static struct kset *shutdown_actions_kset;
1665 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1670 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1671 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1672 if (shutdown_actions_list[i]->init_rc) {
1673 return shutdown_actions_list[i]->init_rc;
1675 trigger->action = shutdown_actions_list[i];
1685 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1688 static ssize_t on_reboot_show(struct kobject *kobj,
1689 struct kobj_attribute *attr, char *page)
1691 return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1694 static ssize_t on_reboot_store(struct kobject *kobj,
1695 struct kobj_attribute *attr,
1696 const char *buf, size_t len)
1698 return set_trigger(buf, &on_reboot_trigger, len);
1700 static struct kobj_attribute on_reboot_attr = __ATTR_RW(on_reboot);
1702 static void do_machine_restart(char *__unused)
1705 on_reboot_trigger.action->fn(&on_reboot_trigger);
1708 void (*_machine_restart)(char *command) = do_machine_restart;
1712 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1714 static ssize_t on_panic_show(struct kobject *kobj,
1715 struct kobj_attribute *attr, char *page)
1717 return sprintf(page, "%s\n", on_panic_trigger.action->name);
1720 static ssize_t on_panic_store(struct kobject *kobj,
1721 struct kobj_attribute *attr,
1722 const char *buf, size_t len)
1724 return set_trigger(buf, &on_panic_trigger, len);
1726 static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic);
1728 static void do_panic(void)
1731 on_panic_trigger.action->fn(&on_panic_trigger);
1732 stop_run(&on_panic_trigger);
1737 static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
1740 static ssize_t on_restart_show(struct kobject *kobj,
1741 struct kobj_attribute *attr, char *page)
1743 return sprintf(page, "%s\n", on_restart_trigger.action->name);
1746 static ssize_t on_restart_store(struct kobject *kobj,
1747 struct kobj_attribute *attr,
1748 const char *buf, size_t len)
1750 return set_trigger(buf, &on_restart_trigger, len);
1752 static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart);
1754 static void __do_restart(void *ignore)
1756 __arch_local_irq_stosm(0x04); /* enable DAT */
1758 #ifdef CONFIG_CRASH_DUMP
1761 on_restart_trigger.action->fn(&on_restart_trigger);
1762 stop_run(&on_restart_trigger);
1765 void do_restart(void)
1770 smp_call_online_cpu(__do_restart, NULL);
1775 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1777 static ssize_t on_halt_show(struct kobject *kobj,
1778 struct kobj_attribute *attr, char *page)
1780 return sprintf(page, "%s\n", on_halt_trigger.action->name);
1783 static ssize_t on_halt_store(struct kobject *kobj,
1784 struct kobj_attribute *attr,
1785 const char *buf, size_t len)
1787 return set_trigger(buf, &on_halt_trigger, len);
1789 static struct kobj_attribute on_halt_attr = __ATTR_RW(on_halt);
1791 static void do_machine_halt(void)
1794 on_halt_trigger.action->fn(&on_halt_trigger);
1795 stop_run(&on_halt_trigger);
1797 void (*_machine_halt)(void) = do_machine_halt;
1801 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1803 static ssize_t on_poff_show(struct kobject *kobj,
1804 struct kobj_attribute *attr, char *page)
1806 return sprintf(page, "%s\n", on_poff_trigger.action->name);
1809 static ssize_t on_poff_store(struct kobject *kobj,
1810 struct kobj_attribute *attr,
1811 const char *buf, size_t len)
1813 return set_trigger(buf, &on_poff_trigger, len);
1815 static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff);
1817 static void do_machine_power_off(void)
1820 on_poff_trigger.action->fn(&on_poff_trigger);
1821 stop_run(&on_poff_trigger);
1823 void (*_machine_power_off)(void) = do_machine_power_off;
1825 static struct attribute *shutdown_action_attrs[] = {
1826 &on_restart_attr.attr,
1827 &on_reboot_attr.attr,
1828 &on_panic_attr.attr,
1834 static struct attribute_group shutdown_action_attr_group = {
1835 .attrs = shutdown_action_attrs,
1838 static void __init shutdown_triggers_init(void)
1840 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1842 if (!shutdown_actions_kset)
1844 if (sysfs_create_group(&shutdown_actions_kset->kobj,
1845 &shutdown_action_attr_group))
1849 panic("shutdown_triggers_init failed\n");
1852 static void __init shutdown_actions_init(void)
1856 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1857 if (!shutdown_actions_list[i]->init)
1859 shutdown_actions_list[i]->init_rc =
1860 shutdown_actions_list[i]->init();
1864 static int __init s390_ipl_init(void)
1866 char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40};
1868 sclp_early_get_ipl_info(&sclp_ipl_info);
1870 * Fix loadparm: There are systems where the (SCSI) LOADPARM
1871 * returned by read SCP info is invalid (contains EBCDIC blanks)
1872 * when the system has been booted via diag308. In that case we use
1873 * the value from diag308, if available.
1875 * There are also systems where diag308 store does not work in
1876 * case the system is booted from HMC. Fortunately in this case
1877 * READ SCP info provides the correct value.
1879 if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 &&
1881 memcpy(sclp_ipl_info.loadparm, ipl_block.hdr.loadparm,
1883 shutdown_actions_init();
1884 shutdown_triggers_init();
1888 __initcall(s390_ipl_init);
1890 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1895 for (sx = 0; src[sx] != 0; sx++) {
1898 dst[dx++] = src[sx];
1904 static int __init vmcmd_on_reboot_setup(char *str)
1908 strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1909 vmcmd_on_reboot[127] = 0;
1910 on_reboot_trigger.action = &vmcmd_action;
1913 __setup("vmreboot=", vmcmd_on_reboot_setup);
1915 static int __init vmcmd_on_panic_setup(char *str)
1919 strncpy_skip_quote(vmcmd_on_panic, str, 127);
1920 vmcmd_on_panic[127] = 0;
1921 on_panic_trigger.action = &vmcmd_action;
1924 __setup("vmpanic=", vmcmd_on_panic_setup);
1926 static int __init vmcmd_on_halt_setup(char *str)
1930 strncpy_skip_quote(vmcmd_on_halt, str, 127);
1931 vmcmd_on_halt[127] = 0;
1932 on_halt_trigger.action = &vmcmd_action;
1935 __setup("vmhalt=", vmcmd_on_halt_setup);
1937 static int __init vmcmd_on_poff_setup(char *str)
1941 strncpy_skip_quote(vmcmd_on_poff, str, 127);
1942 vmcmd_on_poff[127] = 0;
1943 on_poff_trigger.action = &vmcmd_action;
1946 __setup("vmpoff=", vmcmd_on_poff_setup);
1948 static int on_panic_notify(struct notifier_block *self,
1949 unsigned long event, void *data)
1955 static struct notifier_block on_panic_nb = {
1956 .notifier_call = on_panic_notify,
1957 .priority = INT_MIN,
1960 void __init setup_ipl(void)
1962 ipl_info.type = get_ipl_type();
1963 switch (ipl_info.type) {
1965 ipl_info.data.ccw.dev_id.ssid = ipl_ssid;
1966 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1969 case IPL_TYPE_FCP_DUMP:
1970 ipl_info.data.fcp.dev_id.ssid = 0;
1971 ipl_info.data.fcp.dev_id.devno =
1972 IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1973 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1974 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1977 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1978 sizeof(ipl_info.data.nss.name));
1980 case IPL_TYPE_UNKNOWN:
1981 /* We have no info to copy */
1984 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1987 void __init ipl_update_parameters(void)
1991 rc = diag308(DIAG308_STORE, &ipl_block);
1992 if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
1993 diag308_set_works = 1;
1996 void __init ipl_verify_parameters(void)
1998 struct cio_iplinfo iplinfo;
2000 if (cio_get_iplinfo(&iplinfo))
2003 ipl_ssid = iplinfo.ssid;
2004 ipl_devno = iplinfo.devno;
2005 ipl_flags |= IPL_DEVNO_VALID;
2006 if (!iplinfo.is_qdio)
2008 ipl_flags |= IPL_PARMBLOCK_VALID;
2011 static LIST_HEAD(rcall);
2012 static DEFINE_MUTEX(rcall_mutex);
2014 void register_reset_call(struct reset_call *reset)
2016 mutex_lock(&rcall_mutex);
2017 list_add(&reset->list, &rcall);
2018 mutex_unlock(&rcall_mutex);
2020 EXPORT_SYMBOL_GPL(register_reset_call);
2022 void unregister_reset_call(struct reset_call *reset)
2024 mutex_lock(&rcall_mutex);
2025 list_del(&reset->list);
2026 mutex_unlock(&rcall_mutex);
2028 EXPORT_SYMBOL_GPL(unregister_reset_call);
2030 static void do_reset_calls(void)
2032 struct reset_call *reset;
2034 if (diag308_set_works) {
2038 list_for_each_entry(reset, &rcall, list)
2042 void s390_reset_system(void)
2046 lc = (struct lowcore *)(unsigned long) store_prefix();
2048 /* Stack for interrupt/machine check handler */
2049 lc->panic_stack = S390_lowcore.panic_stack;
2051 /* Disable prefixing */
2054 /* Disable lowcore protection */
2055 __ctl_clear_bit(0,28);
2057 /* Set new machine check handler */
2058 S390_lowcore.mcck_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
2059 S390_lowcore.mcck_new_psw.addr =
2060 (unsigned long) s390_base_mcck_handler;
2062 /* Set new program check handler */
2063 S390_lowcore.program_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
2064 S390_lowcore.program_new_psw.addr =
2065 (unsigned long) s390_base_pgm_handler;