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 __section(.data) = 0;
125 static u16 ipl_devno __section(.data) = 0;
126 u32 ipl_flags __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)
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);
802 ipb->hdr.flags |= DIAG308_FLAGS_LP_VALID;
807 static ssize_t reipl_fcp_loadparm_show(struct kobject *kobj,
808 struct kobj_attribute *attr, char *page)
810 return reipl_generic_loadparm_show(reipl_block_fcp, page);
813 static ssize_t reipl_fcp_loadparm_store(struct kobject *kobj,
814 struct kobj_attribute *attr,
815 const char *buf, size_t len)
817 return reipl_generic_loadparm_store(reipl_block_fcp, buf, len);
820 static struct kobj_attribute sys_reipl_fcp_loadparm_attr =
821 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_fcp_loadparm_show,
822 reipl_fcp_loadparm_store);
824 static struct attribute *reipl_fcp_attrs[] = {
825 &sys_reipl_fcp_device_attr.attr,
826 &sys_reipl_fcp_wwpn_attr.attr,
827 &sys_reipl_fcp_lun_attr.attr,
828 &sys_reipl_fcp_bootprog_attr.attr,
829 &sys_reipl_fcp_br_lba_attr.attr,
830 &sys_reipl_fcp_loadparm_attr.attr,
834 static struct attribute_group reipl_fcp_attr_group = {
835 .attrs = reipl_fcp_attrs,
836 .bin_attrs = reipl_fcp_bin_attrs,
839 /* CCW reipl device attributes */
840 DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ipl_info.ccw);
843 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
844 struct kobj_attribute *attr, char *page)
846 return reipl_generic_loadparm_show(reipl_block_nss, page);
849 static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
850 struct kobj_attribute *attr,
851 const char *buf, size_t len)
853 return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
857 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
858 struct kobj_attribute *attr, char *page)
860 return reipl_generic_loadparm_show(reipl_block_ccw, page);
863 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
864 struct kobj_attribute *attr,
865 const char *buf, size_t len)
867 return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
870 static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
871 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
872 reipl_ccw_loadparm_store);
874 static struct attribute *reipl_ccw_attrs_vm[] = {
875 &sys_reipl_ccw_device_attr.attr,
876 &sys_reipl_ccw_loadparm_attr.attr,
877 &sys_reipl_ccw_vmparm_attr.attr,
881 static struct attribute *reipl_ccw_attrs_lpar[] = {
882 &sys_reipl_ccw_device_attr.attr,
883 &sys_reipl_ccw_loadparm_attr.attr,
887 static struct attribute_group reipl_ccw_attr_group_vm = {
889 .attrs = reipl_ccw_attrs_vm,
892 static struct attribute_group reipl_ccw_attr_group_lpar = {
894 .attrs = reipl_ccw_attrs_lpar,
898 /* NSS reipl device attributes */
899 static void reipl_get_ascii_nss_name(char *dst,
900 struct ipl_parameter_block *ipb)
902 memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
903 EBCASC(dst, NSS_NAME_SIZE);
904 dst[NSS_NAME_SIZE] = 0;
907 static ssize_t reipl_nss_name_show(struct kobject *kobj,
908 struct kobj_attribute *attr, char *page)
910 char nss_name[NSS_NAME_SIZE + 1] = {};
912 reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
913 return sprintf(page, "%s\n", nss_name);
916 static ssize_t reipl_nss_name_store(struct kobject *kobj,
917 struct kobj_attribute *attr,
918 const char *buf, size_t len)
922 /* ignore trailing newline */
924 if ((len > 0) && (buf[len - 1] == '\n'))
927 if (nss_len > NSS_NAME_SIZE)
930 memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
932 reipl_block_nss->ipl_info.ccw.vm_flags |=
933 DIAG308_VM_FLAGS_NSS_VALID;
934 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
935 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
936 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
938 reipl_block_nss->ipl_info.ccw.vm_flags &=
939 ~DIAG308_VM_FLAGS_NSS_VALID;
945 static struct kobj_attribute sys_reipl_nss_name_attr =
946 __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
947 reipl_nss_name_store);
949 static struct kobj_attribute sys_reipl_nss_loadparm_attr =
950 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
951 reipl_nss_loadparm_store);
953 static struct attribute *reipl_nss_attrs[] = {
954 &sys_reipl_nss_name_attr.attr,
955 &sys_reipl_nss_loadparm_attr.attr,
956 &sys_reipl_nss_vmparm_attr.attr,
960 static struct attribute_group reipl_nss_attr_group = {
962 .attrs = reipl_nss_attrs,
965 static void set_reipl_block_actual(struct ipl_parameter_block *reipl_block)
967 reipl_block_actual = reipl_block;
968 os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual,
969 reipl_block->hdr.len);
974 static int reipl_set_type(enum ipl_type type)
976 if (!(reipl_capabilities & type))
981 if (diag308_set_works)
982 reipl_method = REIPL_METHOD_CCW_DIAG;
983 else if (MACHINE_IS_VM)
984 reipl_method = REIPL_METHOD_CCW_VM;
986 reipl_method = REIPL_METHOD_CCW_CIO;
987 set_reipl_block_actual(reipl_block_ccw);
990 if (diag308_set_works)
991 reipl_method = REIPL_METHOD_FCP_RW_DIAG;
992 else if (MACHINE_IS_VM)
993 reipl_method = REIPL_METHOD_FCP_RO_VM;
995 reipl_method = REIPL_METHOD_FCP_RO_DIAG;
996 set_reipl_block_actual(reipl_block_fcp);
998 case IPL_TYPE_FCP_DUMP:
999 reipl_method = REIPL_METHOD_FCP_DUMP;
1002 if (diag308_set_works)
1003 reipl_method = REIPL_METHOD_NSS_DIAG;
1005 reipl_method = REIPL_METHOD_NSS;
1006 set_reipl_block_actual(reipl_block_nss);
1008 case IPL_TYPE_UNKNOWN:
1009 reipl_method = REIPL_METHOD_DEFAULT;
1018 static ssize_t reipl_type_show(struct kobject *kobj,
1019 struct kobj_attribute *attr, char *page)
1021 return sprintf(page, "%s\n", ipl_type_str(reipl_type));
1024 static ssize_t reipl_type_store(struct kobject *kobj,
1025 struct kobj_attribute *attr,
1026 const char *buf, size_t len)
1030 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1031 rc = reipl_set_type(IPL_TYPE_CCW);
1032 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1033 rc = reipl_set_type(IPL_TYPE_FCP);
1034 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1035 rc = reipl_set_type(IPL_TYPE_NSS);
1036 return (rc != 0) ? rc : len;
1039 static struct kobj_attribute reipl_type_attr =
1040 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
1042 static struct kset *reipl_kset;
1043 static struct kset *reipl_fcp_kset;
1045 static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
1046 const enum ipl_method m)
1048 char loadparm[LOADPARM_LEN + 1] = {};
1049 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
1050 char nss_name[NSS_NAME_SIZE + 1] = {};
1053 reipl_get_ascii_loadparm(loadparm, ipb);
1054 reipl_get_ascii_nss_name(nss_name, ipb);
1055 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
1058 case REIPL_METHOD_CCW_VM:
1059 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
1061 case REIPL_METHOD_NSS:
1062 pos = sprintf(dst, "IPL %s", nss_name);
1067 if (strlen(loadparm) > 0)
1068 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
1069 if (strlen(vmparm) > 0)
1070 sprintf(dst + pos, " PARM %s", vmparm);
1073 static void __reipl_run(void *unused)
1075 struct ccw_dev_id devid;
1076 static char buf[128];
1078 switch (reipl_method) {
1079 case REIPL_METHOD_CCW_CIO:
1080 devid.ssid = reipl_block_ccw->ipl_info.ccw.ssid;
1081 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
1082 reipl_ccw_dev(&devid);
1084 case REIPL_METHOD_CCW_VM:
1085 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
1086 __cpcmd(buf, NULL, 0, NULL);
1088 case REIPL_METHOD_CCW_DIAG:
1089 diag308(DIAG308_SET, reipl_block_ccw);
1090 if (MACHINE_IS_LPAR)
1091 diag308(DIAG308_LOAD_NORMAL_DUMP, NULL);
1093 diag308(DIAG308_LOAD_CLEAR, NULL);
1095 case REIPL_METHOD_FCP_RW_DIAG:
1096 diag308(DIAG308_SET, reipl_block_fcp);
1097 diag308(DIAG308_LOAD_CLEAR, NULL);
1099 case REIPL_METHOD_FCP_RO_DIAG:
1100 diag308(DIAG308_LOAD_CLEAR, NULL);
1102 case REIPL_METHOD_FCP_RO_VM:
1103 __cpcmd("IPL", NULL, 0, NULL);
1105 case REIPL_METHOD_NSS_DIAG:
1106 diag308(DIAG308_SET, reipl_block_nss);
1107 diag308(DIAG308_LOAD_CLEAR, NULL);
1109 case REIPL_METHOD_NSS:
1110 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
1111 __cpcmd(buf, NULL, 0, NULL);
1113 case REIPL_METHOD_DEFAULT:
1115 __cpcmd("IPL", NULL, 0, NULL);
1116 diag308(DIAG308_LOAD_CLEAR, NULL);
1118 case REIPL_METHOD_FCP_DUMP:
1121 disabled_wait((unsigned long) __builtin_return_address(0));
1124 static void reipl_run(struct shutdown_trigger *trigger)
1126 smp_call_ipl_cpu(__reipl_run, NULL);
1129 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
1131 ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
1132 ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1133 ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1134 ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1137 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1140 /* check if read scp info worked and set loadparm */
1141 if (sclp_ipl_info.is_valid)
1142 memcpy(ipb->hdr.loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
1144 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1145 memset(ipb->hdr.loadparm, 0x40, LOADPARM_LEN);
1146 ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
1149 if (MACHINE_IS_VM && diag308_set_works &&
1150 (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1152 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1153 ipb->ipl_info.ccw.vm_parm_len =
1154 ipl_block.ipl_info.ccw.vm_parm_len;
1155 memcpy(ipb->ipl_info.ccw.vm_parm,
1156 ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1160 static int __init reipl_nss_init(void)
1167 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1168 if (!reipl_block_nss)
1171 if (!diag308_set_works)
1172 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO;
1174 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1178 reipl_block_ccw_init(reipl_block_nss);
1179 if (ipl_info.type == IPL_TYPE_NSS) {
1180 memset(reipl_block_nss->ipl_info.ccw.nss_name,
1181 ' ', NSS_NAME_SIZE);
1182 memcpy(reipl_block_nss->ipl_info.ccw.nss_name,
1183 kernel_nss_name, strlen(kernel_nss_name));
1184 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
1185 reipl_block_nss->ipl_info.ccw.vm_flags |=
1186 DIAG308_VM_FLAGS_NSS_VALID;
1188 reipl_block_ccw_fill_parms(reipl_block_nss);
1191 reipl_capabilities |= IPL_TYPE_NSS;
1195 static int __init reipl_ccw_init(void)
1199 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1200 if (!reipl_block_ccw)
1203 if (MACHINE_IS_VM) {
1204 if (!diag308_set_works)
1205 sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
1206 rc = sysfs_create_group(&reipl_kset->kobj,
1207 &reipl_ccw_attr_group_vm);
1209 if(!diag308_set_works)
1210 sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
1211 rc = sysfs_create_group(&reipl_kset->kobj,
1212 &reipl_ccw_attr_group_lpar);
1217 reipl_block_ccw_init(reipl_block_ccw);
1218 if (ipl_info.type == IPL_TYPE_CCW) {
1219 reipl_block_ccw->ipl_info.ccw.ssid = ipl_ssid;
1220 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
1221 reipl_block_ccw_fill_parms(reipl_block_ccw);
1224 reipl_capabilities |= IPL_TYPE_CCW;
1228 static int __init reipl_fcp_init(void)
1232 if (!diag308_set_works) {
1233 if (ipl_info.type == IPL_TYPE_FCP) {
1234 make_attrs_ro(reipl_fcp_attrs);
1235 sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO;
1240 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1241 if (!reipl_block_fcp)
1244 /* sysfs: create fcp kset for mixing attr group and bin attrs */
1245 reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1247 if (!reipl_fcp_kset) {
1248 free_page((unsigned long) reipl_block_fcp);
1252 rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1254 kset_unregister(reipl_fcp_kset);
1255 free_page((unsigned long) reipl_block_fcp);
1259 if (ipl_info.type == IPL_TYPE_FCP) {
1260 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
1262 * Fix loadparm: There are systems where the (SCSI) LOADPARM
1263 * is invalid in the SCSI IPL parameter block, so take it
1264 * always from sclp_ipl_info.
1266 memcpy(reipl_block_fcp->hdr.loadparm, sclp_ipl_info.loadparm,
1269 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1270 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1271 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1272 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1273 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1275 reipl_capabilities |= IPL_TYPE_FCP;
1279 static int __init reipl_type_init(void)
1281 enum ipl_type reipl_type = ipl_info.type;
1282 struct ipl_parameter_block *reipl_block;
1285 reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size);
1289 * If we have an OS info reipl block, this will be used
1291 if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_FCP) {
1292 memcpy(reipl_block_fcp, reipl_block, size);
1293 reipl_type = IPL_TYPE_FCP;
1294 } else if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_CCW) {
1295 memcpy(reipl_block_ccw, reipl_block, size);
1296 reipl_type = IPL_TYPE_CCW;
1299 return reipl_set_type(reipl_type);
1302 static int __init reipl_init(void)
1306 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1309 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1311 kset_unregister(reipl_kset);
1314 rc = reipl_ccw_init();
1317 rc = reipl_fcp_init();
1320 rc = reipl_nss_init();
1323 return reipl_type_init();
1326 static struct shutdown_action __refdata reipl_action = {
1327 .name = SHUTDOWN_ACTION_REIPL_STR,
1333 * dump shutdown action: Dump Linux on shutdown.
1336 /* FCP dump device attributes */
1338 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n",
1339 dump_block_fcp->ipl_info.fcp.wwpn);
1340 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n",
1341 dump_block_fcp->ipl_info.fcp.lun);
1342 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1343 dump_block_fcp->ipl_info.fcp.bootprog);
1344 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1345 dump_block_fcp->ipl_info.fcp.br_lba);
1346 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1347 dump_block_fcp->ipl_info.fcp.devno);
1349 static struct attribute *dump_fcp_attrs[] = {
1350 &sys_dump_fcp_device_attr.attr,
1351 &sys_dump_fcp_wwpn_attr.attr,
1352 &sys_dump_fcp_lun_attr.attr,
1353 &sys_dump_fcp_bootprog_attr.attr,
1354 &sys_dump_fcp_br_lba_attr.attr,
1358 static struct attribute_group dump_fcp_attr_group = {
1359 .name = IPL_FCP_STR,
1360 .attrs = dump_fcp_attrs,
1363 /* CCW dump device attributes */
1364 DEFINE_IPL_CCW_ATTR_RW(dump_ccw, device, dump_block_ccw->ipl_info.ccw);
1366 static struct attribute *dump_ccw_attrs[] = {
1367 &sys_dump_ccw_device_attr.attr,
1371 static struct attribute_group dump_ccw_attr_group = {
1372 .name = IPL_CCW_STR,
1373 .attrs = dump_ccw_attrs,
1378 static int dump_set_type(enum dump_type type)
1380 if (!(dump_capabilities & type))
1384 if (diag308_set_works)
1385 dump_method = DUMP_METHOD_CCW_DIAG;
1386 else if (MACHINE_IS_VM)
1387 dump_method = DUMP_METHOD_CCW_VM;
1389 dump_method = DUMP_METHOD_CCW_CIO;
1392 dump_method = DUMP_METHOD_FCP_DIAG;
1395 dump_method = DUMP_METHOD_NONE;
1401 static ssize_t dump_type_show(struct kobject *kobj,
1402 struct kobj_attribute *attr, char *page)
1404 return sprintf(page, "%s\n", dump_type_str(dump_type));
1407 static ssize_t dump_type_store(struct kobject *kobj,
1408 struct kobj_attribute *attr,
1409 const char *buf, size_t len)
1413 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1414 rc = dump_set_type(DUMP_TYPE_NONE);
1415 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1416 rc = dump_set_type(DUMP_TYPE_CCW);
1417 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1418 rc = dump_set_type(DUMP_TYPE_FCP);
1419 return (rc != 0) ? rc : len;
1422 static struct kobj_attribute dump_type_attr =
1423 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1425 static struct kset *dump_kset;
1427 static void diag308_dump(void *dump_block)
1429 diag308(DIAG308_SET, dump_block);
1431 if (diag308(DIAG308_LOAD_NORMAL_DUMP, NULL) != 0x302)
1433 udelay_simple(USEC_PER_SEC);
1437 static void __dump_run(void *unused)
1439 struct ccw_dev_id devid;
1440 static char buf[100];
1442 switch (dump_method) {
1443 case DUMP_METHOD_CCW_CIO:
1444 devid.ssid = dump_block_ccw->ipl_info.ccw.ssid;
1445 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
1446 reipl_ccw_dev(&devid);
1448 case DUMP_METHOD_CCW_VM:
1449 sprintf(buf, "STORE STATUS");
1450 __cpcmd(buf, NULL, 0, NULL);
1451 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
1452 __cpcmd(buf, NULL, 0, NULL);
1454 case DUMP_METHOD_CCW_DIAG:
1455 diag308_dump(dump_block_ccw);
1457 case DUMP_METHOD_FCP_DIAG:
1458 diag308_dump(dump_block_fcp);
1465 static void dump_run(struct shutdown_trigger *trigger)
1467 if (dump_method == DUMP_METHOD_NONE)
1470 smp_call_ipl_cpu(__dump_run, NULL);
1473 static int __init dump_ccw_init(void)
1477 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1478 if (!dump_block_ccw)
1480 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1482 free_page((unsigned long)dump_block_ccw);
1485 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1486 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1487 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1488 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1489 dump_capabilities |= DUMP_TYPE_CCW;
1493 static int __init dump_fcp_init(void)
1497 if (!sclp_ipl_info.has_dump)
1498 return 0; /* LDIPL DUMP is not installed */
1499 if (!diag308_set_works)
1501 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1502 if (!dump_block_fcp)
1504 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1506 free_page((unsigned long)dump_block_fcp);
1509 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1510 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1511 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1512 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1513 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1514 dump_capabilities |= DUMP_TYPE_FCP;
1518 static int __init dump_init(void)
1522 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1525 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1527 kset_unregister(dump_kset);
1530 rc = dump_ccw_init();
1533 rc = dump_fcp_init();
1536 dump_set_type(DUMP_TYPE_NONE);
1540 static struct shutdown_action __refdata dump_action = {
1541 .name = SHUTDOWN_ACTION_DUMP_STR,
1546 static void dump_reipl_run(struct shutdown_trigger *trigger)
1548 unsigned long ipib = (unsigned long) reipl_block_actual;
1551 csum = 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_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_save_parameters(void)
1998 struct cio_iplinfo iplinfo;
2001 if (cio_get_iplinfo(&iplinfo))
2004 ipl_ssid = iplinfo.ssid;
2005 ipl_devno = iplinfo.devno;
2006 ipl_flags |= IPL_DEVNO_VALID;
2007 if (!iplinfo.is_qdio)
2009 ipl_flags |= IPL_PARMBLOCK_VALID;
2010 src = (void *)(unsigned long)S390_lowcore.ipl_parmblock_ptr;
2011 dst = (void *)IPL_PARMBLOCK_ORIGIN;
2012 memmove(dst, src, PAGE_SIZE);
2013 S390_lowcore.ipl_parmblock_ptr = IPL_PARMBLOCK_ORIGIN;
2016 static LIST_HEAD(rcall);
2017 static DEFINE_MUTEX(rcall_mutex);
2019 void register_reset_call(struct reset_call *reset)
2021 mutex_lock(&rcall_mutex);
2022 list_add(&reset->list, &rcall);
2023 mutex_unlock(&rcall_mutex);
2025 EXPORT_SYMBOL_GPL(register_reset_call);
2027 void unregister_reset_call(struct reset_call *reset)
2029 mutex_lock(&rcall_mutex);
2030 list_del(&reset->list);
2031 mutex_unlock(&rcall_mutex);
2033 EXPORT_SYMBOL_GPL(unregister_reset_call);
2035 static void do_reset_calls(void)
2037 struct reset_call *reset;
2039 if (diag308_set_works) {
2043 list_for_each_entry(reset, &rcall, list)
2047 void s390_reset_system(void)
2051 lc = (struct lowcore *)(unsigned long) store_prefix();
2053 /* Stack for interrupt/machine check handler */
2054 lc->panic_stack = S390_lowcore.panic_stack;
2056 /* Disable prefixing */
2059 /* Disable lowcore protection */
2060 __ctl_clear_bit(0,28);
2062 /* Set new machine check handler */
2063 S390_lowcore.mcck_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
2064 S390_lowcore.mcck_new_psw.addr =
2065 (unsigned long) s390_base_mcck_handler;
2067 /* Set new program check handler */
2068 S390_lowcore.program_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
2069 S390_lowcore.program_new_psw.addr =
2070 (unsigned long) s390_base_pgm_handler;