2 * ipl/reipl/dump support for Linux on s390.
4 * Copyright IBM Corp. 2005, 2012
5 * Author(s): Michael Holzheu <holzheu@de.ibm.com>
6 * Heiko Carstens <heiko.carstens@de.ibm.com>
7 * Volker Sameske <sameske@de.ibm.com>
10 #include <linux/types.h>
11 #include <linux/export.h>
12 #include <linux/init.h>
13 #include <linux/device.h>
14 #include <linux/delay.h>
15 #include <linux/reboot.h>
16 #include <linux/ctype.h>
18 #include <linux/gfp.h>
19 #include <linux/crash_dump.h>
20 #include <linux/debug_locks.h>
24 #include <asm/setup.h>
25 #include <asm/cpcmd.h>
27 #include <asm/ebcdic.h>
28 #include <asm/reset.h>
30 #include <asm/checksum.h>
31 #include <asm/debug.h>
32 #include <asm/os_info.h>
35 #define IPL_PARM_BLOCK_VERSION 0
37 #define IPL_UNKNOWN_STR "unknown"
38 #define IPL_CCW_STR "ccw"
39 #define IPL_FCP_STR "fcp"
40 #define IPL_FCP_DUMP_STR "fcp_dump"
41 #define IPL_NSS_STR "nss"
43 #define DUMP_CCW_STR "ccw"
44 #define DUMP_FCP_STR "fcp"
45 #define DUMP_NONE_STR "none"
48 * Four shutdown trigger types are supported:
55 #define ON_PANIC_STR "on_panic"
56 #define ON_HALT_STR "on_halt"
57 #define ON_POFF_STR "on_poff"
58 #define ON_REIPL_STR "on_reboot"
59 #define ON_RESTART_STR "on_restart"
61 struct shutdown_action;
62 struct shutdown_trigger {
64 struct shutdown_action *action;
68 * The following shutdown action types are supported:
70 #define SHUTDOWN_ACTION_IPL_STR "ipl"
71 #define SHUTDOWN_ACTION_REIPL_STR "reipl"
72 #define SHUTDOWN_ACTION_DUMP_STR "dump"
73 #define SHUTDOWN_ACTION_VMCMD_STR "vmcmd"
74 #define SHUTDOWN_ACTION_STOP_STR "stop"
75 #define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl"
77 struct shutdown_action {
79 void (*fn) (struct shutdown_trigger *trigger);
84 static char *ipl_type_str(enum ipl_type type)
91 case IPL_TYPE_FCP_DUMP:
92 return IPL_FCP_DUMP_STR;
95 case IPL_TYPE_UNKNOWN:
97 return IPL_UNKNOWN_STR;
107 static char *dump_type_str(enum dump_type type)
111 return DUMP_NONE_STR;
122 * Must be in data section since the bss section
123 * is not cleared when these are accessed.
125 static u8 ipl_ssid __section(.data) = 0;
126 static u16 ipl_devno __section(.data) = 0;
127 u32 ipl_flags __section(.data) = 0;
130 REIPL_METHOD_CCW_CIO,
131 REIPL_METHOD_CCW_DIAG,
133 REIPL_METHOD_FCP_RO_DIAG,
134 REIPL_METHOD_FCP_RW_DIAG,
135 REIPL_METHOD_FCP_RO_VM,
136 REIPL_METHOD_FCP_DUMP,
138 REIPL_METHOD_NSS_DIAG,
139 REIPL_METHOD_DEFAULT,
145 DUMP_METHOD_CCW_DIAG,
147 DUMP_METHOD_FCP_DIAG,
150 static int diag308_set_works = 0;
152 static struct ipl_parameter_block ipl_block;
154 static int reipl_capabilities = IPL_TYPE_UNKNOWN;
156 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
157 static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
158 static struct ipl_parameter_block *reipl_block_fcp;
159 static struct ipl_parameter_block *reipl_block_ccw;
160 static struct ipl_parameter_block *reipl_block_nss;
161 static struct ipl_parameter_block *reipl_block_actual;
163 static int dump_capabilities = DUMP_TYPE_NONE;
164 static enum dump_type dump_type = DUMP_TYPE_NONE;
165 static enum dump_method dump_method = DUMP_METHOD_NONE;
166 static struct ipl_parameter_block *dump_block_fcp;
167 static struct ipl_parameter_block *dump_block_ccw;
169 static struct sclp_ipl_info sclp_ipl_info;
171 static inline int __diag308(unsigned long subcode, void *addr)
173 register unsigned long _addr asm("0") = (unsigned long) addr;
174 register unsigned long _rc asm("1") = 0;
177 " diag %0,%2,0x308\n"
180 : "+d" (_addr), "+d" (_rc)
181 : "d" (subcode) : "cc", "memory");
185 int diag308(unsigned long subcode, void *addr)
187 diag_stat_inc(DIAG_STAT_X308);
188 return __diag308(subcode, addr);
190 EXPORT_SYMBOL_GPL(diag308);
194 #define IPL_ATTR_SHOW_FN(_prefix, _name, _format, args...) \
195 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
196 struct kobj_attribute *attr, \
199 return snprintf(page, PAGE_SIZE, _format, ##args); \
202 #define IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk) \
203 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
204 struct kobj_attribute *attr, \
205 const char *buf, size_t len) \
207 unsigned long long ssid, devno; \
209 if (sscanf(buf, "0.%llx.%llx\n", &ssid, &devno) != 2) \
212 if (ssid > __MAX_SSID || devno > __MAX_SUBCHANNEL) \
215 _ipl_blk.ssid = ssid; \
216 _ipl_blk.devno = devno; \
220 #define DEFINE_IPL_CCW_ATTR_RW(_prefix, _name, _ipl_blk) \
221 IPL_ATTR_SHOW_FN(_prefix, _name, "0.%x.%04x\n", \
222 _ipl_blk.ssid, _ipl_blk.devno); \
223 IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk); \
224 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
225 __ATTR(_name, (S_IRUGO | S_IWUSR), \
226 sys_##_prefix##_##_name##_show, \
227 sys_##_prefix##_##_name##_store) \
229 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
230 IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value) \
231 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
232 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL)
234 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
235 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value) \
236 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
237 struct kobj_attribute *attr, \
238 const char *buf, size_t len) \
240 unsigned long long value; \
241 if (sscanf(buf, _fmt_in, &value) != 1) \
246 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
247 __ATTR(_name,(S_IRUGO | S_IWUSR), \
248 sys_##_prefix##_##_name##_show, \
249 sys_##_prefix##_##_name##_store)
251 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
252 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, _value) \
253 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
254 struct kobj_attribute *attr, \
255 const char *buf, size_t len) \
257 strncpy(_value, buf, sizeof(_value) - 1); \
261 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
262 __ATTR(_name,(S_IRUGO | S_IWUSR), \
263 sys_##_prefix##_##_name##_show, \
264 sys_##_prefix##_##_name##_store)
266 static void make_attrs_ro(struct attribute **attrs)
269 (*attrs)->mode = S_IRUGO;
278 static __init enum ipl_type get_ipl_type(void)
280 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
282 if (!(ipl_flags & IPL_DEVNO_VALID))
283 return IPL_TYPE_UNKNOWN;
284 if (!(ipl_flags & IPL_PARMBLOCK_VALID))
286 if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
287 return IPL_TYPE_UNKNOWN;
288 if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
289 return IPL_TYPE_UNKNOWN;
290 if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
291 return IPL_TYPE_FCP_DUMP;
295 struct ipl_info ipl_info;
296 EXPORT_SYMBOL_GPL(ipl_info);
298 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
301 return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
304 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
306 /* VM IPL PARM routines */
307 static size_t reipl_get_ascii_vmparm(char *dest, size_t size,
308 const struct ipl_parameter_block *ipb)
312 char has_lowercase = 0;
315 if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
316 (ipb->ipl_info.ccw.vm_parm_len > 0)) {
318 len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
319 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
320 /* If at least one character is lowercase, we assume mixed
321 * case; otherwise we convert everything to lowercase.
323 for (i = 0; i < len; i++)
324 if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
325 (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
326 (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
331 EBC_TOLOWER(dest, len);
339 size_t append_ipl_vmparm(char *dest, size_t size)
344 if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
345 rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
351 static ssize_t ipl_vm_parm_show(struct kobject *kobj,
352 struct kobj_attribute *attr, char *page)
354 char parm[DIAG308_VMPARM_SIZE + 1] = {};
356 append_ipl_vmparm(parm, sizeof(parm));
357 return sprintf(page, "%s\n", parm);
360 static size_t scpdata_length(const char* buf, size_t count)
363 if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
370 static size_t reipl_append_ascii_scpdata(char *dest, size_t size,
371 const struct ipl_parameter_block *ipb)
377 count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data,
378 ipb->ipl_info.fcp.scp_data_len));
383 for (i = 0; i < count; i++) {
384 if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
388 if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
393 memcpy(dest, ipb->ipl_info.fcp.scp_data, count);
395 for (i = 0; i < count; i++)
396 dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]);
402 size_t append_ipl_scpdata(char *dest, size_t len)
407 if (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP)
408 rc = reipl_append_ascii_scpdata(dest, len, &ipl_block);
415 static struct kobj_attribute sys_ipl_vm_parm_attr =
416 __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
418 static ssize_t sys_ipl_device_show(struct kobject *kobj,
419 struct kobj_attribute *attr, char *page)
421 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
423 switch (ipl_info.type) {
425 return sprintf(page, "0.%x.%04x\n", ipl_ssid, ipl_devno);
427 case IPL_TYPE_FCP_DUMP:
428 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
434 static struct kobj_attribute sys_ipl_device_attr =
435 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
437 static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
438 struct bin_attribute *attr, char *buf,
439 loff_t off, size_t count)
441 return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START,
444 static struct bin_attribute ipl_parameter_attr =
445 __BIN_ATTR(binary_parameter, S_IRUGO, ipl_parameter_read, NULL,
448 static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
449 struct bin_attribute *attr, char *buf,
450 loff_t off, size_t count)
452 unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
453 void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
455 return memory_read_from_buffer(buf, count, &off, scp_data, size);
457 static struct bin_attribute ipl_scp_data_attr =
458 __BIN_ATTR(scp_data, S_IRUGO, ipl_scp_data_read, NULL, PAGE_SIZE);
460 static struct bin_attribute *ipl_fcp_bin_attrs[] = {
466 /* FCP ipl device attributes */
468 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
469 IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
470 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
471 IPL_PARMBLOCK_START->ipl_info.fcp.lun);
472 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
473 IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
474 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
475 IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
477 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
478 struct kobj_attribute *attr, char *page)
480 char loadparm[LOADPARM_LEN + 1] = {};
482 if (!sclp_ipl_info.is_valid)
483 return sprintf(page, "#unknown#\n");
484 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
485 EBCASC(loadparm, LOADPARM_LEN);
487 return sprintf(page, "%s\n", loadparm);
490 static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
491 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
493 static struct attribute *ipl_fcp_attrs[] = {
494 &sys_ipl_type_attr.attr,
495 &sys_ipl_device_attr.attr,
496 &sys_ipl_fcp_wwpn_attr.attr,
497 &sys_ipl_fcp_lun_attr.attr,
498 &sys_ipl_fcp_bootprog_attr.attr,
499 &sys_ipl_fcp_br_lba_attr.attr,
500 &sys_ipl_ccw_loadparm_attr.attr,
504 static struct attribute_group ipl_fcp_attr_group = {
505 .attrs = ipl_fcp_attrs,
506 .bin_attrs = ipl_fcp_bin_attrs,
509 /* CCW ipl device attributes */
511 static struct attribute *ipl_ccw_attrs_vm[] = {
512 &sys_ipl_type_attr.attr,
513 &sys_ipl_device_attr.attr,
514 &sys_ipl_ccw_loadparm_attr.attr,
515 &sys_ipl_vm_parm_attr.attr,
519 static struct attribute *ipl_ccw_attrs_lpar[] = {
520 &sys_ipl_type_attr.attr,
521 &sys_ipl_device_attr.attr,
522 &sys_ipl_ccw_loadparm_attr.attr,
526 static struct attribute_group ipl_ccw_attr_group_vm = {
527 .attrs = ipl_ccw_attrs_vm,
530 static struct attribute_group ipl_ccw_attr_group_lpar = {
531 .attrs = ipl_ccw_attrs_lpar
534 /* UNKNOWN ipl device attributes */
536 static struct attribute *ipl_unknown_attrs[] = {
537 &sys_ipl_type_attr.attr,
541 static struct attribute_group ipl_unknown_attr_group = {
542 .attrs = ipl_unknown_attrs,
545 static struct kset *ipl_kset;
547 static void __ipl_run(void *unused)
549 diag308(DIAG308_LOAD_CLEAR, NULL);
551 __cpcmd("IPL", NULL, 0, NULL);
552 else if (ipl_info.type == IPL_TYPE_CCW)
553 reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
556 static void ipl_run(struct shutdown_trigger *trigger)
558 smp_call_ipl_cpu(__ipl_run, NULL);
561 static int __init ipl_init(void)
565 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
570 switch (ipl_info.type) {
573 rc = sysfs_create_group(&ipl_kset->kobj,
574 &ipl_ccw_attr_group_vm);
576 rc = sysfs_create_group(&ipl_kset->kobj,
577 &ipl_ccw_attr_group_lpar);
580 case IPL_TYPE_FCP_DUMP:
581 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
584 rc = sysfs_create_group(&ipl_kset->kobj,
585 &ipl_unknown_attr_group);
590 panic("ipl_init failed: rc = %i\n", rc);
595 static struct shutdown_action __refdata ipl_action = {
596 .name = SHUTDOWN_ACTION_IPL_STR,
602 * reipl shutdown action: Reboot Linux on shutdown.
605 /* VM IPL PARM attributes */
606 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
609 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
611 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
612 return sprintf(page, "%s\n", vmparm);
615 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
617 const char *buf, size_t len)
621 /* ignore trailing newline */
623 if ((len > 0) && (buf[len - 1] == '\n'))
626 if (ip_len > vmparm_max)
629 /* parm is used to store kernel options, check for common chars */
630 for (i = 0; i < ip_len; i++)
631 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
634 memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
635 ipb->ipl_info.ccw.vm_parm_len = ip_len;
637 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
638 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
639 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
641 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
648 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
649 struct kobj_attribute *attr, char *page)
651 return reipl_generic_vmparm_show(reipl_block_nss, page);
654 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
655 struct kobj_attribute *attr,
656 const char *buf, size_t len)
658 return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
662 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
663 struct kobj_attribute *attr, char *page)
665 return reipl_generic_vmparm_show(reipl_block_ccw, page);
668 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
669 struct kobj_attribute *attr,
670 const char *buf, size_t len)
672 return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
675 static struct kobj_attribute sys_reipl_nss_vmparm_attr =
676 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
677 reipl_nss_vmparm_store);
678 static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
679 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
680 reipl_ccw_vmparm_store);
682 /* FCP reipl device attributes */
684 static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
685 struct bin_attribute *attr,
686 char *buf, loff_t off, size_t count)
688 size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
689 void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
691 return memory_read_from_buffer(buf, count, &off, scp_data, size);
694 static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
695 struct bin_attribute *attr,
696 char *buf, loff_t off, size_t count)
698 size_t scpdata_len = count;
705 memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf, count);
706 if (scpdata_len % 8) {
707 padding = 8 - (scpdata_len % 8);
708 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
710 scpdata_len += padding;
713 reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
714 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
715 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
719 static struct bin_attribute sys_reipl_fcp_scp_data_attr =
720 __BIN_ATTR(scp_data, (S_IRUGO | S_IWUSR), reipl_fcp_scpdata_read,
721 reipl_fcp_scpdata_write, DIAG308_SCPDATA_SIZE);
723 static struct bin_attribute *reipl_fcp_bin_attrs[] = {
724 &sys_reipl_fcp_scp_data_attr,
728 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n",
729 reipl_block_fcp->ipl_info.fcp.wwpn);
730 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n",
731 reipl_block_fcp->ipl_info.fcp.lun);
732 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
733 reipl_block_fcp->ipl_info.fcp.bootprog);
734 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
735 reipl_block_fcp->ipl_info.fcp.br_lba);
736 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
737 reipl_block_fcp->ipl_info.fcp.devno);
739 static void reipl_get_ascii_loadparm(char *loadparm,
740 struct ipl_parameter_block *ibp)
742 memcpy(loadparm, ibp->hdr.loadparm, LOADPARM_LEN);
743 EBCASC(loadparm, LOADPARM_LEN);
744 loadparm[LOADPARM_LEN] = 0;
748 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
751 char buf[LOADPARM_LEN + 1];
753 reipl_get_ascii_loadparm(buf, ipb);
754 return sprintf(page, "%s\n", buf);
757 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
758 const char *buf, size_t len)
762 /* ignore trailing newline */
764 if ((len > 0) && (buf[len - 1] == '\n'))
766 /* loadparm can have max 8 characters and must not start with a blank */
767 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
769 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
770 for (i = 0; i < lp_len; i++) {
771 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
776 /* initialize loadparm with blanks */
777 memset(ipb->hdr.loadparm, ' ', LOADPARM_LEN);
778 /* copy and convert to ebcdic */
779 memcpy(ipb->hdr.loadparm, buf, lp_len);
780 ASCEBC(ipb->hdr.loadparm, LOADPARM_LEN);
785 static ssize_t reipl_fcp_loadparm_show(struct kobject *kobj,
786 struct kobj_attribute *attr, char *page)
788 return reipl_generic_loadparm_show(reipl_block_fcp, page);
791 static ssize_t reipl_fcp_loadparm_store(struct kobject *kobj,
792 struct kobj_attribute *attr,
793 const char *buf, size_t len)
795 return reipl_generic_loadparm_store(reipl_block_fcp, buf, len);
798 static struct kobj_attribute sys_reipl_fcp_loadparm_attr =
799 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_fcp_loadparm_show,
800 reipl_fcp_loadparm_store);
802 static struct attribute *reipl_fcp_attrs[] = {
803 &sys_reipl_fcp_device_attr.attr,
804 &sys_reipl_fcp_wwpn_attr.attr,
805 &sys_reipl_fcp_lun_attr.attr,
806 &sys_reipl_fcp_bootprog_attr.attr,
807 &sys_reipl_fcp_br_lba_attr.attr,
808 &sys_reipl_fcp_loadparm_attr.attr,
812 static struct attribute_group reipl_fcp_attr_group = {
813 .attrs = reipl_fcp_attrs,
814 .bin_attrs = reipl_fcp_bin_attrs,
817 /* CCW reipl device attributes */
818 DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ipl_info.ccw);
821 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
822 struct kobj_attribute *attr, char *page)
824 return reipl_generic_loadparm_show(reipl_block_nss, page);
827 static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
828 struct kobj_attribute *attr,
829 const char *buf, size_t len)
831 return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
835 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
836 struct kobj_attribute *attr, char *page)
838 return reipl_generic_loadparm_show(reipl_block_ccw, page);
841 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
842 struct kobj_attribute *attr,
843 const char *buf, size_t len)
845 return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
848 static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
849 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
850 reipl_ccw_loadparm_store);
852 static struct attribute *reipl_ccw_attrs_vm[] = {
853 &sys_reipl_ccw_device_attr.attr,
854 &sys_reipl_ccw_loadparm_attr.attr,
855 &sys_reipl_ccw_vmparm_attr.attr,
859 static struct attribute *reipl_ccw_attrs_lpar[] = {
860 &sys_reipl_ccw_device_attr.attr,
861 &sys_reipl_ccw_loadparm_attr.attr,
865 static struct attribute_group reipl_ccw_attr_group_vm = {
867 .attrs = reipl_ccw_attrs_vm,
870 static struct attribute_group reipl_ccw_attr_group_lpar = {
872 .attrs = reipl_ccw_attrs_lpar,
876 /* NSS reipl device attributes */
877 static void reipl_get_ascii_nss_name(char *dst,
878 struct ipl_parameter_block *ipb)
880 memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
881 EBCASC(dst, NSS_NAME_SIZE);
882 dst[NSS_NAME_SIZE] = 0;
885 static ssize_t reipl_nss_name_show(struct kobject *kobj,
886 struct kobj_attribute *attr, char *page)
888 char nss_name[NSS_NAME_SIZE + 1] = {};
890 reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
891 return sprintf(page, "%s\n", nss_name);
894 static ssize_t reipl_nss_name_store(struct kobject *kobj,
895 struct kobj_attribute *attr,
896 const char *buf, size_t len)
900 /* ignore trailing newline */
902 if ((len > 0) && (buf[len - 1] == '\n'))
905 if (nss_len > NSS_NAME_SIZE)
908 memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
910 reipl_block_nss->ipl_info.ccw.vm_flags |=
911 DIAG308_VM_FLAGS_NSS_VALID;
912 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
913 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
914 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
916 reipl_block_nss->ipl_info.ccw.vm_flags &=
917 ~DIAG308_VM_FLAGS_NSS_VALID;
923 static struct kobj_attribute sys_reipl_nss_name_attr =
924 __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
925 reipl_nss_name_store);
927 static struct kobj_attribute sys_reipl_nss_loadparm_attr =
928 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
929 reipl_nss_loadparm_store);
931 static struct attribute *reipl_nss_attrs[] = {
932 &sys_reipl_nss_name_attr.attr,
933 &sys_reipl_nss_loadparm_attr.attr,
934 &sys_reipl_nss_vmparm_attr.attr,
938 static struct attribute_group reipl_nss_attr_group = {
940 .attrs = reipl_nss_attrs,
943 static void set_reipl_block_actual(struct ipl_parameter_block *reipl_block)
945 reipl_block_actual = reipl_block;
946 os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual,
947 reipl_block->hdr.len);
952 static int reipl_set_type(enum ipl_type type)
954 if (!(reipl_capabilities & type))
959 if (diag308_set_works)
960 reipl_method = REIPL_METHOD_CCW_DIAG;
961 else if (MACHINE_IS_VM)
962 reipl_method = REIPL_METHOD_CCW_VM;
964 reipl_method = REIPL_METHOD_CCW_CIO;
965 set_reipl_block_actual(reipl_block_ccw);
968 if (diag308_set_works)
969 reipl_method = REIPL_METHOD_FCP_RW_DIAG;
970 else if (MACHINE_IS_VM)
971 reipl_method = REIPL_METHOD_FCP_RO_VM;
973 reipl_method = REIPL_METHOD_FCP_RO_DIAG;
974 set_reipl_block_actual(reipl_block_fcp);
976 case IPL_TYPE_FCP_DUMP:
977 reipl_method = REIPL_METHOD_FCP_DUMP;
980 if (diag308_set_works)
981 reipl_method = REIPL_METHOD_NSS_DIAG;
983 reipl_method = REIPL_METHOD_NSS;
984 set_reipl_block_actual(reipl_block_nss);
986 case IPL_TYPE_UNKNOWN:
987 reipl_method = REIPL_METHOD_DEFAULT;
996 static ssize_t reipl_type_show(struct kobject *kobj,
997 struct kobj_attribute *attr, char *page)
999 return sprintf(page, "%s\n", ipl_type_str(reipl_type));
1002 static ssize_t reipl_type_store(struct kobject *kobj,
1003 struct kobj_attribute *attr,
1004 const char *buf, size_t len)
1008 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1009 rc = reipl_set_type(IPL_TYPE_CCW);
1010 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1011 rc = reipl_set_type(IPL_TYPE_FCP);
1012 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1013 rc = reipl_set_type(IPL_TYPE_NSS);
1014 return (rc != 0) ? rc : len;
1017 static struct kobj_attribute reipl_type_attr =
1018 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
1020 static struct kset *reipl_kset;
1021 static struct kset *reipl_fcp_kset;
1023 static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
1024 const enum ipl_method m)
1026 char loadparm[LOADPARM_LEN + 1] = {};
1027 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
1028 char nss_name[NSS_NAME_SIZE + 1] = {};
1031 reipl_get_ascii_loadparm(loadparm, ipb);
1032 reipl_get_ascii_nss_name(nss_name, ipb);
1033 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
1036 case REIPL_METHOD_CCW_VM:
1037 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
1039 case REIPL_METHOD_NSS:
1040 pos = sprintf(dst, "IPL %s", nss_name);
1045 if (strlen(loadparm) > 0)
1046 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
1047 if (strlen(vmparm) > 0)
1048 sprintf(dst + pos, " PARM %s", vmparm);
1051 static void __reipl_run(void *unused)
1053 struct ccw_dev_id devid;
1054 static char buf[128];
1056 switch (reipl_method) {
1057 case REIPL_METHOD_CCW_CIO:
1058 devid.ssid = reipl_block_ccw->ipl_info.ccw.ssid;
1059 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
1060 reipl_ccw_dev(&devid);
1062 case REIPL_METHOD_CCW_VM:
1063 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
1064 __cpcmd(buf, NULL, 0, NULL);
1066 case REIPL_METHOD_CCW_DIAG:
1067 diag308(DIAG308_SET, reipl_block_ccw);
1068 diag308(DIAG308_LOAD_CLEAR, NULL);
1070 case REIPL_METHOD_FCP_RW_DIAG:
1071 diag308(DIAG308_SET, reipl_block_fcp);
1072 diag308(DIAG308_LOAD_CLEAR, NULL);
1074 case REIPL_METHOD_FCP_RO_DIAG:
1075 diag308(DIAG308_LOAD_CLEAR, NULL);
1077 case REIPL_METHOD_FCP_RO_VM:
1078 __cpcmd("IPL", NULL, 0, NULL);
1080 case REIPL_METHOD_NSS_DIAG:
1081 diag308(DIAG308_SET, reipl_block_nss);
1082 diag308(DIAG308_LOAD_CLEAR, NULL);
1084 case REIPL_METHOD_NSS:
1085 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
1086 __cpcmd(buf, NULL, 0, NULL);
1088 case REIPL_METHOD_DEFAULT:
1090 __cpcmd("IPL", NULL, 0, NULL);
1091 diag308(DIAG308_LOAD_CLEAR, NULL);
1093 case REIPL_METHOD_FCP_DUMP:
1096 disabled_wait((unsigned long) __builtin_return_address(0));
1099 static void reipl_run(struct shutdown_trigger *trigger)
1101 smp_call_ipl_cpu(__reipl_run, NULL);
1104 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
1106 ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
1107 ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1108 ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1109 ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1112 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1115 /* check if read scp info worked and set loadparm */
1116 if (sclp_ipl_info.is_valid)
1117 memcpy(ipb->hdr.loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
1119 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1120 memset(ipb->hdr.loadparm, 0x40, LOADPARM_LEN);
1121 ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
1124 if (MACHINE_IS_VM && diag308_set_works &&
1125 (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1127 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1128 ipb->ipl_info.ccw.vm_parm_len =
1129 ipl_block.ipl_info.ccw.vm_parm_len;
1130 memcpy(ipb->ipl_info.ccw.vm_parm,
1131 ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1135 static int __init reipl_nss_init(void)
1142 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1143 if (!reipl_block_nss)
1146 if (!diag308_set_works)
1147 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO;
1149 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1153 reipl_block_ccw_init(reipl_block_nss);
1154 reipl_capabilities |= IPL_TYPE_NSS;
1158 static int __init reipl_ccw_init(void)
1162 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1163 if (!reipl_block_ccw)
1166 if (MACHINE_IS_VM) {
1167 if (!diag308_set_works)
1168 sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
1169 rc = sysfs_create_group(&reipl_kset->kobj,
1170 &reipl_ccw_attr_group_vm);
1172 if(!diag308_set_works)
1173 sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
1174 rc = sysfs_create_group(&reipl_kset->kobj,
1175 &reipl_ccw_attr_group_lpar);
1180 reipl_block_ccw_init(reipl_block_ccw);
1181 if (ipl_info.type == IPL_TYPE_CCW) {
1182 reipl_block_ccw->ipl_info.ccw.ssid = ipl_ssid;
1183 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
1184 reipl_block_ccw_fill_parms(reipl_block_ccw);
1187 reipl_capabilities |= IPL_TYPE_CCW;
1191 static int __init reipl_fcp_init(void)
1195 if (!diag308_set_works) {
1196 if (ipl_info.type == IPL_TYPE_FCP) {
1197 make_attrs_ro(reipl_fcp_attrs);
1198 sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO;
1203 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1204 if (!reipl_block_fcp)
1207 /* sysfs: create fcp kset for mixing attr group and bin attrs */
1208 reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1210 if (!reipl_fcp_kset) {
1211 free_page((unsigned long) reipl_block_fcp);
1215 rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1217 kset_unregister(reipl_fcp_kset);
1218 free_page((unsigned long) reipl_block_fcp);
1222 if (ipl_info.type == IPL_TYPE_FCP) {
1223 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
1225 * Fix loadparm: There are systems where the (SCSI) LOADPARM
1226 * is invalid in the SCSI IPL parameter block, so take it
1227 * always from sclp_ipl_info.
1229 memcpy(reipl_block_fcp->hdr.loadparm, sclp_ipl_info.loadparm,
1232 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1233 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1234 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1235 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1236 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1238 reipl_capabilities |= IPL_TYPE_FCP;
1242 static int __init reipl_type_init(void)
1244 enum ipl_type reipl_type = ipl_info.type;
1245 struct ipl_parameter_block *reipl_block;
1248 reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size);
1252 * If we have an OS info reipl block, this will be used
1254 if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_FCP) {
1255 memcpy(reipl_block_fcp, reipl_block, size);
1256 reipl_type = IPL_TYPE_FCP;
1257 } else if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_CCW) {
1258 memcpy(reipl_block_ccw, reipl_block, size);
1259 reipl_type = IPL_TYPE_CCW;
1262 return reipl_set_type(reipl_type);
1265 static int __init reipl_init(void)
1269 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1272 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1274 kset_unregister(reipl_kset);
1277 rc = reipl_ccw_init();
1280 rc = reipl_fcp_init();
1283 rc = reipl_nss_init();
1286 return reipl_type_init();
1289 static struct shutdown_action __refdata reipl_action = {
1290 .name = SHUTDOWN_ACTION_REIPL_STR,
1296 * dump shutdown action: Dump Linux on shutdown.
1299 /* FCP dump device attributes */
1301 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n",
1302 dump_block_fcp->ipl_info.fcp.wwpn);
1303 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n",
1304 dump_block_fcp->ipl_info.fcp.lun);
1305 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1306 dump_block_fcp->ipl_info.fcp.bootprog);
1307 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1308 dump_block_fcp->ipl_info.fcp.br_lba);
1309 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1310 dump_block_fcp->ipl_info.fcp.devno);
1312 static struct attribute *dump_fcp_attrs[] = {
1313 &sys_dump_fcp_device_attr.attr,
1314 &sys_dump_fcp_wwpn_attr.attr,
1315 &sys_dump_fcp_lun_attr.attr,
1316 &sys_dump_fcp_bootprog_attr.attr,
1317 &sys_dump_fcp_br_lba_attr.attr,
1321 static struct attribute_group dump_fcp_attr_group = {
1322 .name = IPL_FCP_STR,
1323 .attrs = dump_fcp_attrs,
1326 /* CCW dump device attributes */
1327 DEFINE_IPL_CCW_ATTR_RW(dump_ccw, device, dump_block_ccw->ipl_info.ccw);
1329 static struct attribute *dump_ccw_attrs[] = {
1330 &sys_dump_ccw_device_attr.attr,
1334 static struct attribute_group dump_ccw_attr_group = {
1335 .name = IPL_CCW_STR,
1336 .attrs = dump_ccw_attrs,
1341 static int dump_set_type(enum dump_type type)
1343 if (!(dump_capabilities & type))
1347 if (diag308_set_works)
1348 dump_method = DUMP_METHOD_CCW_DIAG;
1349 else if (MACHINE_IS_VM)
1350 dump_method = DUMP_METHOD_CCW_VM;
1352 dump_method = DUMP_METHOD_CCW_CIO;
1355 dump_method = DUMP_METHOD_FCP_DIAG;
1358 dump_method = DUMP_METHOD_NONE;
1364 static ssize_t dump_type_show(struct kobject *kobj,
1365 struct kobj_attribute *attr, char *page)
1367 return sprintf(page, "%s\n", dump_type_str(dump_type));
1370 static ssize_t dump_type_store(struct kobject *kobj,
1371 struct kobj_attribute *attr,
1372 const char *buf, size_t len)
1376 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1377 rc = dump_set_type(DUMP_TYPE_NONE);
1378 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1379 rc = dump_set_type(DUMP_TYPE_CCW);
1380 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1381 rc = dump_set_type(DUMP_TYPE_FCP);
1382 return (rc != 0) ? rc : len;
1385 static struct kobj_attribute dump_type_attr =
1386 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1388 static struct kset *dump_kset;
1390 static void diag308_dump(void *dump_block)
1392 diag308(DIAG308_SET, dump_block);
1394 if (diag308(DIAG308_LOAD_NORMAL_DUMP, NULL) != 0x302)
1396 udelay_simple(USEC_PER_SEC);
1400 static void __dump_run(void *unused)
1402 struct ccw_dev_id devid;
1403 static char buf[100];
1405 switch (dump_method) {
1406 case DUMP_METHOD_CCW_CIO:
1407 devid.ssid = dump_block_ccw->ipl_info.ccw.ssid;
1408 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
1409 reipl_ccw_dev(&devid);
1411 case DUMP_METHOD_CCW_VM:
1412 sprintf(buf, "STORE STATUS");
1413 __cpcmd(buf, NULL, 0, NULL);
1414 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
1415 __cpcmd(buf, NULL, 0, NULL);
1417 case DUMP_METHOD_CCW_DIAG:
1418 diag308_dump(dump_block_ccw);
1420 case DUMP_METHOD_FCP_DIAG:
1421 diag308_dump(dump_block_fcp);
1428 static void dump_run(struct shutdown_trigger *trigger)
1430 if (dump_method == DUMP_METHOD_NONE)
1433 smp_call_ipl_cpu(__dump_run, NULL);
1436 static int __init dump_ccw_init(void)
1440 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1441 if (!dump_block_ccw)
1443 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1445 free_page((unsigned long)dump_block_ccw);
1448 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1449 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1450 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1451 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1452 dump_capabilities |= DUMP_TYPE_CCW;
1456 static int __init dump_fcp_init(void)
1460 if (!sclp_ipl_info.has_dump)
1461 return 0; /* LDIPL DUMP is not installed */
1462 if (!diag308_set_works)
1464 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1465 if (!dump_block_fcp)
1467 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1469 free_page((unsigned long)dump_block_fcp);
1472 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1473 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1474 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1475 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1476 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1477 dump_capabilities |= DUMP_TYPE_FCP;
1481 static int __init dump_init(void)
1485 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1488 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1490 kset_unregister(dump_kset);
1493 rc = dump_ccw_init();
1496 rc = dump_fcp_init();
1499 dump_set_type(DUMP_TYPE_NONE);
1503 static struct shutdown_action __refdata dump_action = {
1504 .name = SHUTDOWN_ACTION_DUMP_STR,
1509 static void dump_reipl_run(struct shutdown_trigger *trigger)
1511 unsigned long ipib = (unsigned long) reipl_block_actual;
1514 csum = (__force unsigned int)
1515 csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
1516 mem_assign_absolute(S390_lowcore.ipib, ipib);
1517 mem_assign_absolute(S390_lowcore.ipib_checksum, csum);
1521 static int __init dump_reipl_init(void)
1523 if (!diag308_set_works)
1529 static struct shutdown_action __refdata dump_reipl_action = {
1530 .name = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1531 .fn = dump_reipl_run,
1532 .init = dump_reipl_init,
1536 * vmcmd shutdown action: Trigger vm command on shutdown.
1539 static char vmcmd_on_reboot[128];
1540 static char vmcmd_on_panic[128];
1541 static char vmcmd_on_halt[128];
1542 static char vmcmd_on_poff[128];
1543 static char vmcmd_on_restart[128];
1545 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1546 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1547 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1548 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1549 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1551 static struct attribute *vmcmd_attrs[] = {
1552 &sys_vmcmd_on_reboot_attr.attr,
1553 &sys_vmcmd_on_panic_attr.attr,
1554 &sys_vmcmd_on_halt_attr.attr,
1555 &sys_vmcmd_on_poff_attr.attr,
1556 &sys_vmcmd_on_restart_attr.attr,
1560 static struct attribute_group vmcmd_attr_group = {
1561 .attrs = vmcmd_attrs,
1564 static struct kset *vmcmd_kset;
1566 static void vmcmd_run(struct shutdown_trigger *trigger)
1570 if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1571 cmd = vmcmd_on_reboot;
1572 else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1573 cmd = vmcmd_on_panic;
1574 else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1575 cmd = vmcmd_on_halt;
1576 else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1577 cmd = vmcmd_on_poff;
1578 else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
1579 cmd = vmcmd_on_restart;
1583 if (strlen(cmd) == 0)
1585 __cpcmd(cmd, NULL, 0, NULL);
1588 static int vmcmd_init(void)
1592 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1595 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1598 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1599 vmcmd_run, vmcmd_init};
1602 * stop shutdown action: Stop Linux on shutdown.
1605 static void stop_run(struct shutdown_trigger *trigger)
1607 if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
1608 strcmp(trigger->name, ON_RESTART_STR) == 0)
1609 disabled_wait((unsigned long) __builtin_return_address(0));
1613 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1618 static struct shutdown_action *shutdown_actions_list[] = {
1619 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1620 &vmcmd_action, &stop_action};
1621 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1627 static struct kset *shutdown_actions_kset;
1629 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1634 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1635 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1636 if (shutdown_actions_list[i]->init_rc) {
1637 return shutdown_actions_list[i]->init_rc;
1639 trigger->action = shutdown_actions_list[i];
1649 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1652 static ssize_t on_reboot_show(struct kobject *kobj,
1653 struct kobj_attribute *attr, char *page)
1655 return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1658 static ssize_t on_reboot_store(struct kobject *kobj,
1659 struct kobj_attribute *attr,
1660 const char *buf, size_t len)
1662 return set_trigger(buf, &on_reboot_trigger, len);
1664 static struct kobj_attribute on_reboot_attr = __ATTR_RW(on_reboot);
1666 static void do_machine_restart(char *__unused)
1669 on_reboot_trigger.action->fn(&on_reboot_trigger);
1672 void (*_machine_restart)(char *command) = do_machine_restart;
1676 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1678 static ssize_t on_panic_show(struct kobject *kobj,
1679 struct kobj_attribute *attr, char *page)
1681 return sprintf(page, "%s\n", on_panic_trigger.action->name);
1684 static ssize_t on_panic_store(struct kobject *kobj,
1685 struct kobj_attribute *attr,
1686 const char *buf, size_t len)
1688 return set_trigger(buf, &on_panic_trigger, len);
1690 static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic);
1692 static void do_panic(void)
1695 on_panic_trigger.action->fn(&on_panic_trigger);
1696 stop_run(&on_panic_trigger);
1701 static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
1704 static ssize_t on_restart_show(struct kobject *kobj,
1705 struct kobj_attribute *attr, char *page)
1707 return sprintf(page, "%s\n", on_restart_trigger.action->name);
1710 static ssize_t on_restart_store(struct kobject *kobj,
1711 struct kobj_attribute *attr,
1712 const char *buf, size_t len)
1714 return set_trigger(buf, &on_restart_trigger, len);
1716 static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart);
1718 static void __do_restart(void *ignore)
1720 __arch_local_irq_stosm(0x04); /* enable DAT */
1722 #ifdef CONFIG_CRASH_DUMP
1725 on_restart_trigger.action->fn(&on_restart_trigger);
1726 stop_run(&on_restart_trigger);
1729 void do_restart(void)
1734 smp_call_online_cpu(__do_restart, NULL);
1739 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1741 static ssize_t on_halt_show(struct kobject *kobj,
1742 struct kobj_attribute *attr, char *page)
1744 return sprintf(page, "%s\n", on_halt_trigger.action->name);
1747 static ssize_t on_halt_store(struct kobject *kobj,
1748 struct kobj_attribute *attr,
1749 const char *buf, size_t len)
1751 return set_trigger(buf, &on_halt_trigger, len);
1753 static struct kobj_attribute on_halt_attr = __ATTR_RW(on_halt);
1755 static void do_machine_halt(void)
1758 on_halt_trigger.action->fn(&on_halt_trigger);
1759 stop_run(&on_halt_trigger);
1761 void (*_machine_halt)(void) = do_machine_halt;
1765 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1767 static ssize_t on_poff_show(struct kobject *kobj,
1768 struct kobj_attribute *attr, char *page)
1770 return sprintf(page, "%s\n", on_poff_trigger.action->name);
1773 static ssize_t on_poff_store(struct kobject *kobj,
1774 struct kobj_attribute *attr,
1775 const char *buf, size_t len)
1777 return set_trigger(buf, &on_poff_trigger, len);
1779 static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff);
1781 static void do_machine_power_off(void)
1784 on_poff_trigger.action->fn(&on_poff_trigger);
1785 stop_run(&on_poff_trigger);
1787 void (*_machine_power_off)(void) = do_machine_power_off;
1789 static struct attribute *shutdown_action_attrs[] = {
1790 &on_restart_attr.attr,
1791 &on_reboot_attr.attr,
1792 &on_panic_attr.attr,
1798 static struct attribute_group shutdown_action_attr_group = {
1799 .attrs = shutdown_action_attrs,
1802 static void __init shutdown_triggers_init(void)
1804 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1806 if (!shutdown_actions_kset)
1808 if (sysfs_create_group(&shutdown_actions_kset->kobj,
1809 &shutdown_action_attr_group))
1813 panic("shutdown_triggers_init failed\n");
1816 static void __init shutdown_actions_init(void)
1820 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1821 if (!shutdown_actions_list[i]->init)
1823 shutdown_actions_list[i]->init_rc =
1824 shutdown_actions_list[i]->init();
1828 static int __init s390_ipl_init(void)
1830 char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40};
1832 sclp_early_get_ipl_info(&sclp_ipl_info);
1834 * Fix loadparm: There are systems where the (SCSI) LOADPARM
1835 * returned by read SCP info is invalid (contains EBCDIC blanks)
1836 * when the system has been booted via diag308. In that case we use
1837 * the value from diag308, if available.
1839 * There are also systems where diag308 store does not work in
1840 * case the system is booted from HMC. Fortunately in this case
1841 * READ SCP info provides the correct value.
1843 if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 &&
1845 memcpy(sclp_ipl_info.loadparm, ipl_block.hdr.loadparm,
1847 shutdown_actions_init();
1848 shutdown_triggers_init();
1852 __initcall(s390_ipl_init);
1854 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1859 for (sx = 0; src[sx] != 0; sx++) {
1862 dst[dx++] = src[sx];
1868 static int __init vmcmd_on_reboot_setup(char *str)
1872 strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1873 vmcmd_on_reboot[127] = 0;
1874 on_reboot_trigger.action = &vmcmd_action;
1877 __setup("vmreboot=", vmcmd_on_reboot_setup);
1879 static int __init vmcmd_on_panic_setup(char *str)
1883 strncpy_skip_quote(vmcmd_on_panic, str, 127);
1884 vmcmd_on_panic[127] = 0;
1885 on_panic_trigger.action = &vmcmd_action;
1888 __setup("vmpanic=", vmcmd_on_panic_setup);
1890 static int __init vmcmd_on_halt_setup(char *str)
1894 strncpy_skip_quote(vmcmd_on_halt, str, 127);
1895 vmcmd_on_halt[127] = 0;
1896 on_halt_trigger.action = &vmcmd_action;
1899 __setup("vmhalt=", vmcmd_on_halt_setup);
1901 static int __init vmcmd_on_poff_setup(char *str)
1905 strncpy_skip_quote(vmcmd_on_poff, str, 127);
1906 vmcmd_on_poff[127] = 0;
1907 on_poff_trigger.action = &vmcmd_action;
1910 __setup("vmpoff=", vmcmd_on_poff_setup);
1912 static int on_panic_notify(struct notifier_block *self,
1913 unsigned long event, void *data)
1919 static struct notifier_block on_panic_nb = {
1920 .notifier_call = on_panic_notify,
1921 .priority = INT_MIN,
1924 void __init setup_ipl(void)
1926 ipl_info.type = get_ipl_type();
1927 switch (ipl_info.type) {
1929 ipl_info.data.ccw.dev_id.ssid = ipl_ssid;
1930 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1933 case IPL_TYPE_FCP_DUMP:
1934 ipl_info.data.fcp.dev_id.ssid = 0;
1935 ipl_info.data.fcp.dev_id.devno =
1936 IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1937 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1938 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1941 case IPL_TYPE_UNKNOWN:
1942 /* We have no info to copy */
1945 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1948 void __init ipl_update_parameters(void)
1952 rc = diag308(DIAG308_STORE, &ipl_block);
1953 if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
1954 diag308_set_works = 1;
1957 void __init ipl_verify_parameters(void)
1959 struct cio_iplinfo iplinfo;
1961 if (cio_get_iplinfo(&iplinfo))
1964 ipl_ssid = iplinfo.ssid;
1965 ipl_devno = iplinfo.devno;
1966 ipl_flags |= IPL_DEVNO_VALID;
1967 if (!iplinfo.is_qdio)
1969 ipl_flags |= IPL_PARMBLOCK_VALID;
1972 static LIST_HEAD(rcall);
1973 static DEFINE_MUTEX(rcall_mutex);
1975 void register_reset_call(struct reset_call *reset)
1977 mutex_lock(&rcall_mutex);
1978 list_add(&reset->list, &rcall);
1979 mutex_unlock(&rcall_mutex);
1981 EXPORT_SYMBOL_GPL(register_reset_call);
1983 void unregister_reset_call(struct reset_call *reset)
1985 mutex_lock(&rcall_mutex);
1986 list_del(&reset->list);
1987 mutex_unlock(&rcall_mutex);
1989 EXPORT_SYMBOL_GPL(unregister_reset_call);
1991 static void do_reset_calls(void)
1993 struct reset_call *reset;
1995 if (diag308_set_works) {
1999 list_for_each_entry(reset, &rcall, list)
2003 void s390_reset_system(void)
2007 lc = (struct lowcore *)(unsigned long) store_prefix();
2009 /* Stack for interrupt/machine check handler */
2010 lc->panic_stack = S390_lowcore.panic_stack;
2012 /* Disable prefixing */
2015 /* Disable lowcore protection */
2016 __ctl_clear_bit(0,28);
2018 /* Set new machine check handler */
2019 S390_lowcore.mcck_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
2020 S390_lowcore.mcck_new_psw.addr =
2021 (unsigned long) s390_base_mcck_handler;
2023 /* Set new program check handler */
2024 S390_lowcore.program_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
2025 S390_lowcore.program_new_psw.addr =
2026 (unsigned long) s390_base_pgm_handler;