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/module.h>
12 #include <linux/device.h>
13 #include <linux/delay.h>
14 #include <linux/reboot.h>
15 #include <linux/ctype.h>
17 #include <linux/gfp.h>
18 #include <linux/crash_dump.h>
19 #include <linux/debug_locks.h>
23 #include <asm/setup.h>
24 #include <asm/cpcmd.h>
26 #include <asm/ebcdic.h>
27 #include <asm/reset.h>
29 #include <asm/checksum.h>
30 #include <asm/debug.h>
31 #include <asm/os_info.h>
34 #define IPL_PARM_BLOCK_VERSION 0
36 #define IPL_UNKNOWN_STR "unknown"
37 #define IPL_CCW_STR "ccw"
38 #define IPL_FCP_STR "fcp"
39 #define IPL_FCP_DUMP_STR "fcp_dump"
40 #define IPL_NSS_STR "nss"
42 #define DUMP_CCW_STR "ccw"
43 #define DUMP_FCP_STR "fcp"
44 #define DUMP_NONE_STR "none"
47 * Four shutdown trigger types are supported:
54 #define ON_PANIC_STR "on_panic"
55 #define ON_HALT_STR "on_halt"
56 #define ON_POFF_STR "on_poff"
57 #define ON_REIPL_STR "on_reboot"
58 #define ON_RESTART_STR "on_restart"
60 struct shutdown_action;
61 struct shutdown_trigger {
63 struct shutdown_action *action;
67 * The following shutdown action types are supported:
69 #define SHUTDOWN_ACTION_IPL_STR "ipl"
70 #define SHUTDOWN_ACTION_REIPL_STR "reipl"
71 #define SHUTDOWN_ACTION_DUMP_STR "dump"
72 #define SHUTDOWN_ACTION_VMCMD_STR "vmcmd"
73 #define SHUTDOWN_ACTION_STOP_STR "stop"
74 #define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl"
76 struct shutdown_action {
78 void (*fn) (struct shutdown_trigger *trigger);
83 static char *ipl_type_str(enum ipl_type type)
90 case IPL_TYPE_FCP_DUMP:
91 return IPL_FCP_DUMP_STR;
94 case IPL_TYPE_UNKNOWN:
96 return IPL_UNKNOWN_STR;
106 static char *dump_type_str(enum dump_type type)
110 return DUMP_NONE_STR;
121 * Must be in data section since the bss section
122 * is not cleared when these are accessed.
124 static u8 ipl_ssid __attribute__((__section__(".data"))) = 0;
125 static u16 ipl_devno __attribute__((__section__(".data"))) = 0;
126 u32 ipl_flags __attribute__((__section__(".data"))) = 0;
129 REIPL_METHOD_CCW_CIO,
130 REIPL_METHOD_CCW_DIAG,
132 REIPL_METHOD_FCP_RO_DIAG,
133 REIPL_METHOD_FCP_RW_DIAG,
134 REIPL_METHOD_FCP_RO_VM,
135 REIPL_METHOD_FCP_DUMP,
137 REIPL_METHOD_NSS_DIAG,
138 REIPL_METHOD_DEFAULT,
144 DUMP_METHOD_CCW_DIAG,
146 DUMP_METHOD_FCP_DIAG,
149 static int diag308_set_works = 0;
151 static struct ipl_parameter_block ipl_block;
153 static int reipl_capabilities = IPL_TYPE_UNKNOWN;
155 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
156 static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
157 static struct ipl_parameter_block *reipl_block_fcp;
158 static struct ipl_parameter_block *reipl_block_ccw;
159 static struct ipl_parameter_block *reipl_block_nss;
160 static struct ipl_parameter_block *reipl_block_actual;
162 static int dump_capabilities = DUMP_TYPE_NONE;
163 static enum dump_type dump_type = DUMP_TYPE_NONE;
164 static enum dump_method dump_method = DUMP_METHOD_NONE;
165 static struct ipl_parameter_block *dump_block_fcp;
166 static struct ipl_parameter_block *dump_block_ccw;
168 static struct sclp_ipl_info sclp_ipl_info;
170 static inline int __diag308(unsigned long subcode, void *addr)
172 register unsigned long _addr asm("0") = (unsigned long) addr;
173 register unsigned long _rc asm("1") = 0;
176 " diag %0,%2,0x308\n"
179 : "+d" (_addr), "+d" (_rc)
180 : "d" (subcode) : "cc", "memory");
184 int diag308(unsigned long subcode, void *addr)
186 diag_stat_inc(DIAG_STAT_X308);
187 return __diag308(subcode, addr);
189 EXPORT_SYMBOL_GPL(diag308);
193 #define IPL_ATTR_SHOW_FN(_prefix, _name, _format, args...) \
194 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
195 struct kobj_attribute *attr, \
198 return snprintf(page, PAGE_SIZE, _format, ##args); \
201 #define IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk) \
202 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
203 struct kobj_attribute *attr, \
204 const char *buf, size_t len) \
206 unsigned long long ssid, devno; \
208 if (sscanf(buf, "0.%llx.%llx\n", &ssid, &devno) != 2) \
211 if (ssid > __MAX_SSID || devno > __MAX_SUBCHANNEL) \
214 _ipl_blk.ssid = ssid; \
215 _ipl_blk.devno = devno; \
219 #define DEFINE_IPL_CCW_ATTR_RW(_prefix, _name, _ipl_blk) \
220 IPL_ATTR_SHOW_FN(_prefix, _name, "0.%x.%04x\n", \
221 _ipl_blk.ssid, _ipl_blk.devno); \
222 IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk); \
223 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
224 __ATTR(_name, (S_IRUGO | S_IWUSR), \
225 sys_##_prefix##_##_name##_show, \
226 sys_##_prefix##_##_name##_store) \
228 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
229 IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value) \
230 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
231 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL)
233 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
234 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value) \
235 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
236 struct kobj_attribute *attr, \
237 const char *buf, size_t len) \
239 unsigned long long value; \
240 if (sscanf(buf, _fmt_in, &value) != 1) \
245 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
246 __ATTR(_name,(S_IRUGO | S_IWUSR), \
247 sys_##_prefix##_##_name##_show, \
248 sys_##_prefix##_##_name##_store)
250 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
251 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, _value) \
252 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
253 struct kobj_attribute *attr, \
254 const char *buf, size_t len) \
256 strncpy(_value, buf, sizeof(_value) - 1); \
260 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
261 __ATTR(_name,(S_IRUGO | S_IWUSR), \
262 sys_##_prefix##_##_name##_show, \
263 sys_##_prefix##_##_name##_store)
265 static void make_attrs_ro(struct attribute **attrs)
268 (*attrs)->mode = S_IRUGO;
277 static __init enum ipl_type get_ipl_type(void)
279 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
281 if (ipl_flags & IPL_NSS_VALID)
283 if (!(ipl_flags & IPL_DEVNO_VALID))
284 return IPL_TYPE_UNKNOWN;
285 if (!(ipl_flags & IPL_PARMBLOCK_VALID))
287 if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
288 return IPL_TYPE_UNKNOWN;
289 if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
290 return IPL_TYPE_UNKNOWN;
291 if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
292 return IPL_TYPE_FCP_DUMP;
296 struct ipl_info ipl_info;
297 EXPORT_SYMBOL_GPL(ipl_info);
299 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
302 return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
305 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
307 /* VM IPL PARM routines */
308 static size_t reipl_get_ascii_vmparm(char *dest, size_t size,
309 const struct ipl_parameter_block *ipb)
313 char has_lowercase = 0;
316 if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
317 (ipb->ipl_info.ccw.vm_parm_len > 0)) {
319 len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
320 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
321 /* If at least one character is lowercase, we assume mixed
322 * case; otherwise we convert everything to lowercase.
324 for (i = 0; i < len; i++)
325 if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
326 (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
327 (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
332 EBC_TOLOWER(dest, len);
340 size_t append_ipl_vmparm(char *dest, size_t size)
345 if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
346 rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
352 static ssize_t ipl_vm_parm_show(struct kobject *kobj,
353 struct kobj_attribute *attr, char *page)
355 char parm[DIAG308_VMPARM_SIZE + 1] = {};
357 append_ipl_vmparm(parm, sizeof(parm));
358 return sprintf(page, "%s\n", parm);
361 static size_t scpdata_length(const char* buf, size_t count)
364 if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
371 static size_t reipl_append_ascii_scpdata(char *dest, size_t size,
372 const struct ipl_parameter_block *ipb)
378 count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data,
379 ipb->ipl_info.fcp.scp_data_len));
384 for (i = 0; i < count; i++) {
385 if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
389 if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
394 memcpy(dest, ipb->ipl_info.fcp.scp_data, count);
396 for (i = 0; i < count; i++)
397 dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]);
403 size_t append_ipl_scpdata(char *dest, size_t len)
408 if (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP)
409 rc = reipl_append_ascii_scpdata(dest, len, &ipl_block);
416 static struct kobj_attribute sys_ipl_vm_parm_attr =
417 __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
419 static ssize_t sys_ipl_device_show(struct kobject *kobj,
420 struct kobj_attribute *attr, char *page)
422 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
424 switch (ipl_info.type) {
426 return sprintf(page, "0.%x.%04x\n", ipl_ssid, ipl_devno);
428 case IPL_TYPE_FCP_DUMP:
429 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
435 static struct kobj_attribute sys_ipl_device_attr =
436 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
438 static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
439 struct bin_attribute *attr, char *buf,
440 loff_t off, size_t count)
442 return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START,
445 static struct bin_attribute ipl_parameter_attr =
446 __BIN_ATTR(binary_parameter, S_IRUGO, ipl_parameter_read, NULL,
449 static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
450 struct bin_attribute *attr, char *buf,
451 loff_t off, size_t count)
453 unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
454 void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
456 return memory_read_from_buffer(buf, count, &off, scp_data, size);
458 static struct bin_attribute ipl_scp_data_attr =
459 __BIN_ATTR(scp_data, S_IRUGO, ipl_scp_data_read, NULL, PAGE_SIZE);
461 static struct bin_attribute *ipl_fcp_bin_attrs[] = {
467 /* FCP ipl device attributes */
469 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
470 IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
471 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
472 IPL_PARMBLOCK_START->ipl_info.fcp.lun);
473 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
474 IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
475 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
476 IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
478 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
479 struct kobj_attribute *attr, char *page)
481 char loadparm[LOADPARM_LEN + 1] = {};
483 if (!sclp_ipl_info.is_valid)
484 return sprintf(page, "#unknown#\n");
485 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
486 EBCASC(loadparm, LOADPARM_LEN);
488 return sprintf(page, "%s\n", loadparm);
491 static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
492 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
494 static struct attribute *ipl_fcp_attrs[] = {
495 &sys_ipl_type_attr.attr,
496 &sys_ipl_device_attr.attr,
497 &sys_ipl_fcp_wwpn_attr.attr,
498 &sys_ipl_fcp_lun_attr.attr,
499 &sys_ipl_fcp_bootprog_attr.attr,
500 &sys_ipl_fcp_br_lba_attr.attr,
501 &sys_ipl_ccw_loadparm_attr.attr,
505 static struct attribute_group ipl_fcp_attr_group = {
506 .attrs = ipl_fcp_attrs,
507 .bin_attrs = ipl_fcp_bin_attrs,
510 /* CCW ipl device attributes */
512 static struct attribute *ipl_ccw_attrs_vm[] = {
513 &sys_ipl_type_attr.attr,
514 &sys_ipl_device_attr.attr,
515 &sys_ipl_ccw_loadparm_attr.attr,
516 &sys_ipl_vm_parm_attr.attr,
520 static struct attribute *ipl_ccw_attrs_lpar[] = {
521 &sys_ipl_type_attr.attr,
522 &sys_ipl_device_attr.attr,
523 &sys_ipl_ccw_loadparm_attr.attr,
527 static struct attribute_group ipl_ccw_attr_group_vm = {
528 .attrs = ipl_ccw_attrs_vm,
531 static struct attribute_group ipl_ccw_attr_group_lpar = {
532 .attrs = ipl_ccw_attrs_lpar
535 /* NSS ipl device attributes */
537 DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
539 static struct attribute *ipl_nss_attrs[] = {
540 &sys_ipl_type_attr.attr,
541 &sys_ipl_nss_name_attr.attr,
542 &sys_ipl_ccw_loadparm_attr.attr,
543 &sys_ipl_vm_parm_attr.attr,
547 static struct attribute_group ipl_nss_attr_group = {
548 .attrs = ipl_nss_attrs,
551 /* UNKNOWN ipl device attributes */
553 static struct attribute *ipl_unknown_attrs[] = {
554 &sys_ipl_type_attr.attr,
558 static struct attribute_group ipl_unknown_attr_group = {
559 .attrs = ipl_unknown_attrs,
562 static struct kset *ipl_kset;
564 static void __ipl_run(void *unused)
566 diag308(DIAG308_IPL, NULL);
568 __cpcmd("IPL", NULL, 0, NULL);
569 else if (ipl_info.type == IPL_TYPE_CCW)
570 reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
573 static void ipl_run(struct shutdown_trigger *trigger)
575 smp_call_ipl_cpu(__ipl_run, NULL);
578 static int __init ipl_init(void)
582 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
587 switch (ipl_info.type) {
590 rc = sysfs_create_group(&ipl_kset->kobj,
591 &ipl_ccw_attr_group_vm);
593 rc = sysfs_create_group(&ipl_kset->kobj,
594 &ipl_ccw_attr_group_lpar);
597 case IPL_TYPE_FCP_DUMP:
598 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
601 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group);
604 rc = sysfs_create_group(&ipl_kset->kobj,
605 &ipl_unknown_attr_group);
610 panic("ipl_init failed: rc = %i\n", rc);
615 static struct shutdown_action __refdata ipl_action = {
616 .name = SHUTDOWN_ACTION_IPL_STR,
622 * reipl shutdown action: Reboot Linux on shutdown.
625 /* VM IPL PARM attributes */
626 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
629 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
631 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
632 return sprintf(page, "%s\n", vmparm);
635 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
637 const char *buf, size_t len)
641 /* ignore trailing newline */
643 if ((len > 0) && (buf[len - 1] == '\n'))
646 if (ip_len > vmparm_max)
649 /* parm is used to store kernel options, check for common chars */
650 for (i = 0; i < ip_len; i++)
651 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
654 memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
655 ipb->ipl_info.ccw.vm_parm_len = ip_len;
657 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
658 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
659 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
661 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
668 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
669 struct kobj_attribute *attr, char *page)
671 return reipl_generic_vmparm_show(reipl_block_nss, page);
674 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
675 struct kobj_attribute *attr,
676 const char *buf, size_t len)
678 return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
682 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
683 struct kobj_attribute *attr, char *page)
685 return reipl_generic_vmparm_show(reipl_block_ccw, page);
688 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
689 struct kobj_attribute *attr,
690 const char *buf, size_t len)
692 return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
695 static struct kobj_attribute sys_reipl_nss_vmparm_attr =
696 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
697 reipl_nss_vmparm_store);
698 static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
699 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
700 reipl_ccw_vmparm_store);
702 /* FCP reipl device attributes */
704 static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
705 struct bin_attribute *attr,
706 char *buf, loff_t off, size_t count)
708 size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
709 void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
711 return memory_read_from_buffer(buf, count, &off, scp_data, size);
714 static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
715 struct bin_attribute *attr,
716 char *buf, loff_t off, size_t count)
718 size_t scpdata_len = count;
725 memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf, count);
726 if (scpdata_len % 8) {
727 padding = 8 - (scpdata_len % 8);
728 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
730 scpdata_len += padding;
733 reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
734 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
735 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
739 static struct bin_attribute sys_reipl_fcp_scp_data_attr =
740 __BIN_ATTR(scp_data, (S_IRUGO | S_IWUSR), reipl_fcp_scpdata_read,
741 reipl_fcp_scpdata_write, DIAG308_SCPDATA_SIZE);
743 static struct bin_attribute *reipl_fcp_bin_attrs[] = {
744 &sys_reipl_fcp_scp_data_attr,
748 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n",
749 reipl_block_fcp->ipl_info.fcp.wwpn);
750 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n",
751 reipl_block_fcp->ipl_info.fcp.lun);
752 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
753 reipl_block_fcp->ipl_info.fcp.bootprog);
754 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
755 reipl_block_fcp->ipl_info.fcp.br_lba);
756 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
757 reipl_block_fcp->ipl_info.fcp.devno);
759 static void reipl_get_ascii_loadparm(char *loadparm,
760 struct ipl_parameter_block *ibp)
762 memcpy(loadparm, ibp->hdr.loadparm, LOADPARM_LEN);
763 EBCASC(loadparm, LOADPARM_LEN);
764 loadparm[LOADPARM_LEN] = 0;
768 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
771 char buf[LOADPARM_LEN + 1];
773 reipl_get_ascii_loadparm(buf, ipb);
774 return sprintf(page, "%s\n", buf);
777 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
778 const char *buf, size_t len)
782 /* ignore trailing newline */
784 if ((len > 0) && (buf[len - 1] == '\n'))
786 /* loadparm can have max 8 characters and must not start with a blank */
787 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
789 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
790 for (i = 0; i < lp_len; i++) {
791 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
796 /* initialize loadparm with blanks */
797 memset(ipb->hdr.loadparm, ' ', LOADPARM_LEN);
798 /* copy and convert to ebcdic */
799 memcpy(ipb->hdr.loadparm, buf, lp_len);
800 ASCEBC(ipb->hdr.loadparm, LOADPARM_LEN);
805 static ssize_t reipl_fcp_loadparm_show(struct kobject *kobj,
806 struct kobj_attribute *attr, char *page)
808 return reipl_generic_loadparm_show(reipl_block_fcp, page);
811 static ssize_t reipl_fcp_loadparm_store(struct kobject *kobj,
812 struct kobj_attribute *attr,
813 const char *buf, size_t len)
815 return reipl_generic_loadparm_store(reipl_block_fcp, buf, len);
818 static struct kobj_attribute sys_reipl_fcp_loadparm_attr =
819 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_fcp_loadparm_show,
820 reipl_fcp_loadparm_store);
822 static struct attribute *reipl_fcp_attrs[] = {
823 &sys_reipl_fcp_device_attr.attr,
824 &sys_reipl_fcp_wwpn_attr.attr,
825 &sys_reipl_fcp_lun_attr.attr,
826 &sys_reipl_fcp_bootprog_attr.attr,
827 &sys_reipl_fcp_br_lba_attr.attr,
828 &sys_reipl_fcp_loadparm_attr.attr,
832 static struct attribute_group reipl_fcp_attr_group = {
833 .attrs = reipl_fcp_attrs,
834 .bin_attrs = reipl_fcp_bin_attrs,
837 /* CCW reipl device attributes */
838 DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ipl_info.ccw);
841 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
842 struct kobj_attribute *attr, char *page)
844 return reipl_generic_loadparm_show(reipl_block_nss, page);
847 static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
848 struct kobj_attribute *attr,
849 const char *buf, size_t len)
851 return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
855 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
856 struct kobj_attribute *attr, char *page)
858 return reipl_generic_loadparm_show(reipl_block_ccw, page);
861 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
862 struct kobj_attribute *attr,
863 const char *buf, size_t len)
865 return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
868 static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
869 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
870 reipl_ccw_loadparm_store);
872 static struct attribute *reipl_ccw_attrs_vm[] = {
873 &sys_reipl_ccw_device_attr.attr,
874 &sys_reipl_ccw_loadparm_attr.attr,
875 &sys_reipl_ccw_vmparm_attr.attr,
879 static struct attribute *reipl_ccw_attrs_lpar[] = {
880 &sys_reipl_ccw_device_attr.attr,
881 &sys_reipl_ccw_loadparm_attr.attr,
885 static struct attribute_group reipl_ccw_attr_group_vm = {
887 .attrs = reipl_ccw_attrs_vm,
890 static struct attribute_group reipl_ccw_attr_group_lpar = {
892 .attrs = reipl_ccw_attrs_lpar,
896 /* NSS reipl device attributes */
897 static void reipl_get_ascii_nss_name(char *dst,
898 struct ipl_parameter_block *ipb)
900 memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
901 EBCASC(dst, NSS_NAME_SIZE);
902 dst[NSS_NAME_SIZE] = 0;
905 static ssize_t reipl_nss_name_show(struct kobject *kobj,
906 struct kobj_attribute *attr, char *page)
908 char nss_name[NSS_NAME_SIZE + 1] = {};
910 reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
911 return sprintf(page, "%s\n", nss_name);
914 static ssize_t reipl_nss_name_store(struct kobject *kobj,
915 struct kobj_attribute *attr,
916 const char *buf, size_t len)
920 /* ignore trailing newline */
922 if ((len > 0) && (buf[len - 1] == '\n'))
925 if (nss_len > NSS_NAME_SIZE)
928 memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
930 reipl_block_nss->ipl_info.ccw.vm_flags |=
931 DIAG308_VM_FLAGS_NSS_VALID;
932 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
933 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
934 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
936 reipl_block_nss->ipl_info.ccw.vm_flags &=
937 ~DIAG308_VM_FLAGS_NSS_VALID;
943 static struct kobj_attribute sys_reipl_nss_name_attr =
944 __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
945 reipl_nss_name_store);
947 static struct kobj_attribute sys_reipl_nss_loadparm_attr =
948 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
949 reipl_nss_loadparm_store);
951 static struct attribute *reipl_nss_attrs[] = {
952 &sys_reipl_nss_name_attr.attr,
953 &sys_reipl_nss_loadparm_attr.attr,
954 &sys_reipl_nss_vmparm_attr.attr,
958 static struct attribute_group reipl_nss_attr_group = {
960 .attrs = reipl_nss_attrs,
963 static void set_reipl_block_actual(struct ipl_parameter_block *reipl_block)
965 reipl_block_actual = reipl_block;
966 os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual,
967 reipl_block->hdr.len);
972 static int reipl_set_type(enum ipl_type type)
974 if (!(reipl_capabilities & type))
979 if (diag308_set_works)
980 reipl_method = REIPL_METHOD_CCW_DIAG;
981 else if (MACHINE_IS_VM)
982 reipl_method = REIPL_METHOD_CCW_VM;
984 reipl_method = REIPL_METHOD_CCW_CIO;
985 set_reipl_block_actual(reipl_block_ccw);
988 if (diag308_set_works)
989 reipl_method = REIPL_METHOD_FCP_RW_DIAG;
990 else if (MACHINE_IS_VM)
991 reipl_method = REIPL_METHOD_FCP_RO_VM;
993 reipl_method = REIPL_METHOD_FCP_RO_DIAG;
994 set_reipl_block_actual(reipl_block_fcp);
996 case IPL_TYPE_FCP_DUMP:
997 reipl_method = REIPL_METHOD_FCP_DUMP;
1000 if (diag308_set_works)
1001 reipl_method = REIPL_METHOD_NSS_DIAG;
1003 reipl_method = REIPL_METHOD_NSS;
1004 set_reipl_block_actual(reipl_block_nss);
1006 case IPL_TYPE_UNKNOWN:
1007 reipl_method = REIPL_METHOD_DEFAULT;
1016 static ssize_t reipl_type_show(struct kobject *kobj,
1017 struct kobj_attribute *attr, char *page)
1019 return sprintf(page, "%s\n", ipl_type_str(reipl_type));
1022 static ssize_t reipl_type_store(struct kobject *kobj,
1023 struct kobj_attribute *attr,
1024 const char *buf, size_t len)
1028 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1029 rc = reipl_set_type(IPL_TYPE_CCW);
1030 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1031 rc = reipl_set_type(IPL_TYPE_FCP);
1032 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1033 rc = reipl_set_type(IPL_TYPE_NSS);
1034 return (rc != 0) ? rc : len;
1037 static struct kobj_attribute reipl_type_attr =
1038 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
1040 static struct kset *reipl_kset;
1041 static struct kset *reipl_fcp_kset;
1043 static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
1044 const enum ipl_method m)
1046 char loadparm[LOADPARM_LEN + 1] = {};
1047 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
1048 char nss_name[NSS_NAME_SIZE + 1] = {};
1051 reipl_get_ascii_loadparm(loadparm, ipb);
1052 reipl_get_ascii_nss_name(nss_name, ipb);
1053 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
1056 case REIPL_METHOD_CCW_VM:
1057 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
1059 case REIPL_METHOD_NSS:
1060 pos = sprintf(dst, "IPL %s", nss_name);
1065 if (strlen(loadparm) > 0)
1066 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
1067 if (strlen(vmparm) > 0)
1068 sprintf(dst + pos, " PARM %s", vmparm);
1071 static void __reipl_run(void *unused)
1073 struct ccw_dev_id devid;
1074 static char buf[128];
1076 switch (reipl_method) {
1077 case REIPL_METHOD_CCW_CIO:
1078 devid.ssid = reipl_block_ccw->ipl_info.ccw.ssid;
1079 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
1080 reipl_ccw_dev(&devid);
1082 case REIPL_METHOD_CCW_VM:
1083 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
1084 __cpcmd(buf, NULL, 0, NULL);
1086 case REIPL_METHOD_CCW_DIAG:
1087 diag308(DIAG308_SET, reipl_block_ccw);
1088 diag308(DIAG308_IPL, NULL);
1090 case REIPL_METHOD_FCP_RW_DIAG:
1091 diag308(DIAG308_SET, reipl_block_fcp);
1092 diag308(DIAG308_IPL, NULL);
1094 case REIPL_METHOD_FCP_RO_DIAG:
1095 diag308(DIAG308_IPL, NULL);
1097 case REIPL_METHOD_FCP_RO_VM:
1098 __cpcmd("IPL", NULL, 0, NULL);
1100 case REIPL_METHOD_NSS_DIAG:
1101 diag308(DIAG308_SET, reipl_block_nss);
1102 diag308(DIAG308_IPL, NULL);
1104 case REIPL_METHOD_NSS:
1105 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
1106 __cpcmd(buf, NULL, 0, NULL);
1108 case REIPL_METHOD_DEFAULT:
1110 __cpcmd("IPL", NULL, 0, NULL);
1111 diag308(DIAG308_IPL, NULL);
1113 case REIPL_METHOD_FCP_DUMP:
1116 disabled_wait((unsigned long) __builtin_return_address(0));
1119 static void reipl_run(struct shutdown_trigger *trigger)
1121 smp_call_ipl_cpu(__reipl_run, NULL);
1124 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
1126 ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
1127 ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1128 ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1129 ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1132 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1135 /* check if read scp info worked and set loadparm */
1136 if (sclp_ipl_info.is_valid)
1137 memcpy(ipb->hdr.loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
1139 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1140 memset(ipb->hdr.loadparm, 0x40, LOADPARM_LEN);
1141 ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
1144 if (MACHINE_IS_VM && diag308_set_works &&
1145 (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1147 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1148 ipb->ipl_info.ccw.vm_parm_len =
1149 ipl_block.ipl_info.ccw.vm_parm_len;
1150 memcpy(ipb->ipl_info.ccw.vm_parm,
1151 ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1155 static int __init reipl_nss_init(void)
1162 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1163 if (!reipl_block_nss)
1166 if (!diag308_set_works)
1167 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO;
1169 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1173 reipl_block_ccw_init(reipl_block_nss);
1174 if (ipl_info.type == IPL_TYPE_NSS) {
1175 memset(reipl_block_nss->ipl_info.ccw.nss_name,
1176 ' ', NSS_NAME_SIZE);
1177 memcpy(reipl_block_nss->ipl_info.ccw.nss_name,
1178 kernel_nss_name, strlen(kernel_nss_name));
1179 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
1180 reipl_block_nss->ipl_info.ccw.vm_flags |=
1181 DIAG308_VM_FLAGS_NSS_VALID;
1183 reipl_block_ccw_fill_parms(reipl_block_nss);
1186 reipl_capabilities |= IPL_TYPE_NSS;
1190 static int __init reipl_ccw_init(void)
1194 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1195 if (!reipl_block_ccw)
1198 if (MACHINE_IS_VM) {
1199 if (!diag308_set_works)
1200 sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
1201 rc = sysfs_create_group(&reipl_kset->kobj,
1202 &reipl_ccw_attr_group_vm);
1204 if(!diag308_set_works)
1205 sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
1206 rc = sysfs_create_group(&reipl_kset->kobj,
1207 &reipl_ccw_attr_group_lpar);
1212 reipl_block_ccw_init(reipl_block_ccw);
1213 if (ipl_info.type == IPL_TYPE_CCW) {
1214 reipl_block_ccw->ipl_info.ccw.ssid = ipl_ssid;
1215 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
1216 reipl_block_ccw_fill_parms(reipl_block_ccw);
1219 reipl_capabilities |= IPL_TYPE_CCW;
1223 static int __init reipl_fcp_init(void)
1227 if (!diag308_set_works) {
1228 if (ipl_info.type == IPL_TYPE_FCP) {
1229 make_attrs_ro(reipl_fcp_attrs);
1230 sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO;
1235 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1236 if (!reipl_block_fcp)
1239 /* sysfs: create fcp kset for mixing attr group and bin attrs */
1240 reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1242 if (!reipl_fcp_kset) {
1243 free_page((unsigned long) reipl_block_fcp);
1247 rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1249 kset_unregister(reipl_fcp_kset);
1250 free_page((unsigned long) reipl_block_fcp);
1254 if (ipl_info.type == IPL_TYPE_FCP) {
1255 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
1257 * Fix loadparm: There are systems where the (SCSI) LOADPARM
1258 * is invalid in the SCSI IPL parameter block, so take it
1259 * always from sclp_ipl_info.
1261 memcpy(reipl_block_fcp->hdr.loadparm, sclp_ipl_info.loadparm,
1264 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1265 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1266 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1267 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1268 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1270 reipl_capabilities |= IPL_TYPE_FCP;
1274 static int __init reipl_type_init(void)
1276 enum ipl_type reipl_type = ipl_info.type;
1277 struct ipl_parameter_block *reipl_block;
1280 reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size);
1284 * If we have an OS info reipl block, this will be used
1286 if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_FCP) {
1287 memcpy(reipl_block_fcp, reipl_block, size);
1288 reipl_type = IPL_TYPE_FCP;
1289 } else if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_CCW) {
1290 memcpy(reipl_block_ccw, reipl_block, size);
1291 reipl_type = IPL_TYPE_CCW;
1294 return reipl_set_type(reipl_type);
1297 static int __init reipl_init(void)
1301 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1304 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1306 kset_unregister(reipl_kset);
1309 rc = reipl_ccw_init();
1312 rc = reipl_fcp_init();
1315 rc = reipl_nss_init();
1318 return reipl_type_init();
1321 static struct shutdown_action __refdata reipl_action = {
1322 .name = SHUTDOWN_ACTION_REIPL_STR,
1328 * dump shutdown action: Dump Linux on shutdown.
1331 /* FCP dump device attributes */
1333 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n",
1334 dump_block_fcp->ipl_info.fcp.wwpn);
1335 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n",
1336 dump_block_fcp->ipl_info.fcp.lun);
1337 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1338 dump_block_fcp->ipl_info.fcp.bootprog);
1339 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1340 dump_block_fcp->ipl_info.fcp.br_lba);
1341 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1342 dump_block_fcp->ipl_info.fcp.devno);
1344 static struct attribute *dump_fcp_attrs[] = {
1345 &sys_dump_fcp_device_attr.attr,
1346 &sys_dump_fcp_wwpn_attr.attr,
1347 &sys_dump_fcp_lun_attr.attr,
1348 &sys_dump_fcp_bootprog_attr.attr,
1349 &sys_dump_fcp_br_lba_attr.attr,
1353 static struct attribute_group dump_fcp_attr_group = {
1354 .name = IPL_FCP_STR,
1355 .attrs = dump_fcp_attrs,
1358 /* CCW dump device attributes */
1359 DEFINE_IPL_CCW_ATTR_RW(dump_ccw, device, dump_block_ccw->ipl_info.ccw);
1361 static struct attribute *dump_ccw_attrs[] = {
1362 &sys_dump_ccw_device_attr.attr,
1366 static struct attribute_group dump_ccw_attr_group = {
1367 .name = IPL_CCW_STR,
1368 .attrs = dump_ccw_attrs,
1373 static int dump_set_type(enum dump_type type)
1375 if (!(dump_capabilities & type))
1379 if (diag308_set_works)
1380 dump_method = DUMP_METHOD_CCW_DIAG;
1381 else if (MACHINE_IS_VM)
1382 dump_method = DUMP_METHOD_CCW_VM;
1384 dump_method = DUMP_METHOD_CCW_CIO;
1387 dump_method = DUMP_METHOD_FCP_DIAG;
1390 dump_method = DUMP_METHOD_NONE;
1396 static ssize_t dump_type_show(struct kobject *kobj,
1397 struct kobj_attribute *attr, char *page)
1399 return sprintf(page, "%s\n", dump_type_str(dump_type));
1402 static ssize_t dump_type_store(struct kobject *kobj,
1403 struct kobj_attribute *attr,
1404 const char *buf, size_t len)
1408 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1409 rc = dump_set_type(DUMP_TYPE_NONE);
1410 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1411 rc = dump_set_type(DUMP_TYPE_CCW);
1412 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1413 rc = dump_set_type(DUMP_TYPE_FCP);
1414 return (rc != 0) ? rc : len;
1417 static struct kobj_attribute dump_type_attr =
1418 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1420 static struct kset *dump_kset;
1422 static void diag308_dump(void *dump_block)
1424 diag308(DIAG308_SET, dump_block);
1426 if (diag308(DIAG308_DUMP, NULL) != 0x302)
1428 udelay_simple(USEC_PER_SEC);
1432 static void __dump_run(void *unused)
1434 struct ccw_dev_id devid;
1435 static char buf[100];
1437 switch (dump_method) {
1438 case DUMP_METHOD_CCW_CIO:
1439 devid.ssid = dump_block_ccw->ipl_info.ccw.ssid;
1440 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
1441 reipl_ccw_dev(&devid);
1443 case DUMP_METHOD_CCW_VM:
1444 sprintf(buf, "STORE STATUS");
1445 __cpcmd(buf, NULL, 0, NULL);
1446 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
1447 __cpcmd(buf, NULL, 0, NULL);
1449 case DUMP_METHOD_CCW_DIAG:
1450 diag308_dump(dump_block_ccw);
1452 case DUMP_METHOD_FCP_DIAG:
1453 diag308_dump(dump_block_fcp);
1460 static void dump_run(struct shutdown_trigger *trigger)
1462 if (dump_method == DUMP_METHOD_NONE)
1465 smp_call_ipl_cpu(__dump_run, NULL);
1468 static int __init dump_ccw_init(void)
1472 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1473 if (!dump_block_ccw)
1475 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1477 free_page((unsigned long)dump_block_ccw);
1480 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1481 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1482 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1483 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1484 dump_capabilities |= DUMP_TYPE_CCW;
1488 static int __init dump_fcp_init(void)
1492 if (!sclp_ipl_info.has_dump)
1493 return 0; /* LDIPL DUMP is not installed */
1494 if (!diag308_set_works)
1496 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1497 if (!dump_block_fcp)
1499 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1501 free_page((unsigned long)dump_block_fcp);
1504 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1505 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1506 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1507 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1508 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1509 dump_capabilities |= DUMP_TYPE_FCP;
1513 static int __init dump_init(void)
1517 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1520 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1522 kset_unregister(dump_kset);
1525 rc = dump_ccw_init();
1528 rc = dump_fcp_init();
1531 dump_set_type(DUMP_TYPE_NONE);
1535 static struct shutdown_action __refdata dump_action = {
1536 .name = SHUTDOWN_ACTION_DUMP_STR,
1541 static void dump_reipl_run(struct shutdown_trigger *trigger)
1543 unsigned long ipib = (unsigned long) reipl_block_actual;
1546 csum = csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
1547 mem_assign_absolute(S390_lowcore.ipib, ipib);
1548 mem_assign_absolute(S390_lowcore.ipib_checksum, csum);
1552 static int __init dump_reipl_init(void)
1554 if (!diag308_set_works)
1560 static struct shutdown_action __refdata dump_reipl_action = {
1561 .name = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1562 .fn = dump_reipl_run,
1563 .init = dump_reipl_init,
1567 * vmcmd shutdown action: Trigger vm command on shutdown.
1570 static char vmcmd_on_reboot[128];
1571 static char vmcmd_on_panic[128];
1572 static char vmcmd_on_halt[128];
1573 static char vmcmd_on_poff[128];
1574 static char vmcmd_on_restart[128];
1576 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1577 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1578 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1579 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1580 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1582 static struct attribute *vmcmd_attrs[] = {
1583 &sys_vmcmd_on_reboot_attr.attr,
1584 &sys_vmcmd_on_panic_attr.attr,
1585 &sys_vmcmd_on_halt_attr.attr,
1586 &sys_vmcmd_on_poff_attr.attr,
1587 &sys_vmcmd_on_restart_attr.attr,
1591 static struct attribute_group vmcmd_attr_group = {
1592 .attrs = vmcmd_attrs,
1595 static struct kset *vmcmd_kset;
1597 static void vmcmd_run(struct shutdown_trigger *trigger)
1601 if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1602 cmd = vmcmd_on_reboot;
1603 else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1604 cmd = vmcmd_on_panic;
1605 else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1606 cmd = vmcmd_on_halt;
1607 else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1608 cmd = vmcmd_on_poff;
1609 else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
1610 cmd = vmcmd_on_restart;
1614 if (strlen(cmd) == 0)
1616 __cpcmd(cmd, NULL, 0, NULL);
1619 static int vmcmd_init(void)
1623 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1626 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1629 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1630 vmcmd_run, vmcmd_init};
1633 * stop shutdown action: Stop Linux on shutdown.
1636 static void stop_run(struct shutdown_trigger *trigger)
1638 if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
1639 strcmp(trigger->name, ON_RESTART_STR) == 0)
1640 disabled_wait((unsigned long) __builtin_return_address(0));
1644 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1649 static struct shutdown_action *shutdown_actions_list[] = {
1650 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1651 &vmcmd_action, &stop_action};
1652 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1658 static struct kset *shutdown_actions_kset;
1660 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1665 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1666 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1667 if (shutdown_actions_list[i]->init_rc) {
1668 return shutdown_actions_list[i]->init_rc;
1670 trigger->action = shutdown_actions_list[i];
1680 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1683 static ssize_t on_reboot_show(struct kobject *kobj,
1684 struct kobj_attribute *attr, char *page)
1686 return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1689 static ssize_t on_reboot_store(struct kobject *kobj,
1690 struct kobj_attribute *attr,
1691 const char *buf, size_t len)
1693 return set_trigger(buf, &on_reboot_trigger, len);
1695 static struct kobj_attribute on_reboot_attr = __ATTR_RW(on_reboot);
1697 static void do_machine_restart(char *__unused)
1700 on_reboot_trigger.action->fn(&on_reboot_trigger);
1703 void (*_machine_restart)(char *command) = do_machine_restart;
1707 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1709 static ssize_t on_panic_show(struct kobject *kobj,
1710 struct kobj_attribute *attr, char *page)
1712 return sprintf(page, "%s\n", on_panic_trigger.action->name);
1715 static ssize_t on_panic_store(struct kobject *kobj,
1716 struct kobj_attribute *attr,
1717 const char *buf, size_t len)
1719 return set_trigger(buf, &on_panic_trigger, len);
1721 static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic);
1723 static void do_panic(void)
1726 on_panic_trigger.action->fn(&on_panic_trigger);
1727 stop_run(&on_panic_trigger);
1732 static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
1735 static ssize_t on_restart_show(struct kobject *kobj,
1736 struct kobj_attribute *attr, char *page)
1738 return sprintf(page, "%s\n", on_restart_trigger.action->name);
1741 static ssize_t on_restart_store(struct kobject *kobj,
1742 struct kobj_attribute *attr,
1743 const char *buf, size_t len)
1745 return set_trigger(buf, &on_restart_trigger, len);
1747 static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart);
1749 static void __do_restart(void *ignore)
1751 __arch_local_irq_stosm(0x04); /* enable DAT */
1753 #ifdef CONFIG_CRASH_DUMP
1756 on_restart_trigger.action->fn(&on_restart_trigger);
1757 stop_run(&on_restart_trigger);
1760 void do_restart(void)
1765 smp_call_online_cpu(__do_restart, NULL);
1770 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1772 static ssize_t on_halt_show(struct kobject *kobj,
1773 struct kobj_attribute *attr, char *page)
1775 return sprintf(page, "%s\n", on_halt_trigger.action->name);
1778 static ssize_t on_halt_store(struct kobject *kobj,
1779 struct kobj_attribute *attr,
1780 const char *buf, size_t len)
1782 return set_trigger(buf, &on_halt_trigger, len);
1784 static struct kobj_attribute on_halt_attr = __ATTR_RW(on_halt);
1786 static void do_machine_halt(void)
1789 on_halt_trigger.action->fn(&on_halt_trigger);
1790 stop_run(&on_halt_trigger);
1792 void (*_machine_halt)(void) = do_machine_halt;
1796 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1798 static ssize_t on_poff_show(struct kobject *kobj,
1799 struct kobj_attribute *attr, char *page)
1801 return sprintf(page, "%s\n", on_poff_trigger.action->name);
1804 static ssize_t on_poff_store(struct kobject *kobj,
1805 struct kobj_attribute *attr,
1806 const char *buf, size_t len)
1808 return set_trigger(buf, &on_poff_trigger, len);
1810 static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff);
1812 static void do_machine_power_off(void)
1815 on_poff_trigger.action->fn(&on_poff_trigger);
1816 stop_run(&on_poff_trigger);
1818 void (*_machine_power_off)(void) = do_machine_power_off;
1820 static struct attribute *shutdown_action_attrs[] = {
1821 &on_restart_attr.attr,
1822 &on_reboot_attr.attr,
1823 &on_panic_attr.attr,
1829 static struct attribute_group shutdown_action_attr_group = {
1830 .attrs = shutdown_action_attrs,
1833 static void __init shutdown_triggers_init(void)
1835 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1837 if (!shutdown_actions_kset)
1839 if (sysfs_create_group(&shutdown_actions_kset->kobj,
1840 &shutdown_action_attr_group))
1844 panic("shutdown_triggers_init failed\n");
1847 static void __init shutdown_actions_init(void)
1851 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1852 if (!shutdown_actions_list[i]->init)
1854 shutdown_actions_list[i]->init_rc =
1855 shutdown_actions_list[i]->init();
1859 static int __init s390_ipl_init(void)
1861 char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40};
1863 sclp_get_ipl_info(&sclp_ipl_info);
1865 * Fix loadparm: There are systems where the (SCSI) LOADPARM
1866 * returned by read SCP info is invalid (contains EBCDIC blanks)
1867 * when the system has been booted via diag308. In that case we use
1868 * the value from diag308, if available.
1870 * There are also systems where diag308 store does not work in
1871 * case the system is booted from HMC. Fortunately in this case
1872 * READ SCP info provides the correct value.
1874 if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 &&
1876 memcpy(sclp_ipl_info.loadparm, ipl_block.hdr.loadparm,
1878 shutdown_actions_init();
1879 shutdown_triggers_init();
1883 __initcall(s390_ipl_init);
1885 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1890 for (sx = 0; src[sx] != 0; sx++) {
1893 dst[dx++] = src[sx];
1899 static int __init vmcmd_on_reboot_setup(char *str)
1903 strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1904 vmcmd_on_reboot[127] = 0;
1905 on_reboot_trigger.action = &vmcmd_action;
1908 __setup("vmreboot=", vmcmd_on_reboot_setup);
1910 static int __init vmcmd_on_panic_setup(char *str)
1914 strncpy_skip_quote(vmcmd_on_panic, str, 127);
1915 vmcmd_on_panic[127] = 0;
1916 on_panic_trigger.action = &vmcmd_action;
1919 __setup("vmpanic=", vmcmd_on_panic_setup);
1921 static int __init vmcmd_on_halt_setup(char *str)
1925 strncpy_skip_quote(vmcmd_on_halt, str, 127);
1926 vmcmd_on_halt[127] = 0;
1927 on_halt_trigger.action = &vmcmd_action;
1930 __setup("vmhalt=", vmcmd_on_halt_setup);
1932 static int __init vmcmd_on_poff_setup(char *str)
1936 strncpy_skip_quote(vmcmd_on_poff, str, 127);
1937 vmcmd_on_poff[127] = 0;
1938 on_poff_trigger.action = &vmcmd_action;
1941 __setup("vmpoff=", vmcmd_on_poff_setup);
1943 static int on_panic_notify(struct notifier_block *self,
1944 unsigned long event, void *data)
1950 static struct notifier_block on_panic_nb = {
1951 .notifier_call = on_panic_notify,
1952 .priority = INT_MIN,
1955 void __init setup_ipl(void)
1957 ipl_info.type = get_ipl_type();
1958 switch (ipl_info.type) {
1960 ipl_info.data.ccw.dev_id.ssid = ipl_ssid;
1961 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1964 case IPL_TYPE_FCP_DUMP:
1965 ipl_info.data.fcp.dev_id.ssid = 0;
1966 ipl_info.data.fcp.dev_id.devno =
1967 IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1968 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1969 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1972 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1973 sizeof(ipl_info.data.nss.name));
1975 case IPL_TYPE_UNKNOWN:
1976 /* We have no info to copy */
1979 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1982 void __init ipl_update_parameters(void)
1986 rc = diag308(DIAG308_STORE, &ipl_block);
1987 if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
1988 diag308_set_works = 1;
1991 void __init ipl_save_parameters(void)
1993 struct cio_iplinfo iplinfo;
1996 if (cio_get_iplinfo(&iplinfo))
1999 ipl_ssid = iplinfo.ssid;
2000 ipl_devno = iplinfo.devno;
2001 ipl_flags |= IPL_DEVNO_VALID;
2002 if (!iplinfo.is_qdio)
2004 ipl_flags |= IPL_PARMBLOCK_VALID;
2005 src = (void *)(unsigned long)S390_lowcore.ipl_parmblock_ptr;
2006 dst = (void *)IPL_PARMBLOCK_ORIGIN;
2007 memmove(dst, src, PAGE_SIZE);
2008 S390_lowcore.ipl_parmblock_ptr = IPL_PARMBLOCK_ORIGIN;
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 u32 dump_prefix_page;
2044 void s390_reset_system(void (*fn_pre)(void),
2045 void (*fn_post)(void *), void *data)
2047 struct _lowcore *lc;
2049 lc = (struct _lowcore *)(unsigned long) store_prefix();
2051 /* Stack for interrupt/machine check handler */
2052 lc->panic_stack = S390_lowcore.panic_stack;
2054 /* Save prefix page address for dump case */
2055 dump_prefix_page = (u32)(unsigned long) lc;
2057 /* Disable prefixing */
2060 /* Disable lowcore protection */
2061 __ctl_clear_bit(0,28);
2063 /* Set new machine check handler */
2064 S390_lowcore.mcck_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
2065 S390_lowcore.mcck_new_psw.addr =
2066 PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;
2068 /* Set new program check handler */
2069 S390_lowcore.program_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
2070 S390_lowcore.program_new_psw.addr =
2071 PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
2074 * Clear subchannel ID and number to signal new kernel that no CCW or
2075 * SCSI IPL has been done (for kexec and kdump)
2077 S390_lowcore.subchannel_id = 0;
2078 S390_lowcore.subchannel_nr = 0;
2080 /* Store status at absolute zero */
2083 /* Call function before reset */
2087 /* Call function after reset */