2 * arch/s390/kernel/ipl.c
3 * ipl/reipl/dump support for Linux on s390.
5 * Copyright IBM Corp. 2005,2012
6 * Author(s): Michael Holzheu <holzheu@de.ibm.com>
7 * Heiko Carstens <heiko.carstens@de.ibm.com>
8 * Volker Sameske <sameske@de.ibm.com>
11 #include <linux/types.h>
12 #include <linux/module.h>
13 #include <linux/device.h>
14 #include <linux/delay.h>
15 #include <linux/reboot.h>
16 #include <linux/ctype.h>
18 #include <linux/gfp.h>
19 #include <linux/crash_dump.h>
20 #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 u16 ipl_devno
__attribute__((__section__(".data"))) = 0;
125 u32 ipl_flags
__attribute__((__section__(".data"))) = 0;
128 REIPL_METHOD_CCW_CIO
,
129 REIPL_METHOD_CCW_DIAG
,
131 REIPL_METHOD_FCP_RO_DIAG
,
132 REIPL_METHOD_FCP_RW_DIAG
,
133 REIPL_METHOD_FCP_RO_VM
,
134 REIPL_METHOD_FCP_DUMP
,
136 REIPL_METHOD_NSS_DIAG
,
137 REIPL_METHOD_DEFAULT
,
143 DUMP_METHOD_CCW_DIAG
,
145 DUMP_METHOD_FCP_DIAG
,
148 static int diag308_set_works
= 0;
150 static struct ipl_parameter_block ipl_block
;
152 static int reipl_capabilities
= IPL_TYPE_UNKNOWN
;
154 static enum ipl_type reipl_type
= IPL_TYPE_UNKNOWN
;
155 static enum ipl_method reipl_method
= REIPL_METHOD_DEFAULT
;
156 static struct ipl_parameter_block
*reipl_block_fcp
;
157 static struct ipl_parameter_block
*reipl_block_ccw
;
158 static struct ipl_parameter_block
*reipl_block_nss
;
159 static struct ipl_parameter_block
*reipl_block_actual
;
161 static int dump_capabilities
= DUMP_TYPE_NONE
;
162 static enum dump_type dump_type
= DUMP_TYPE_NONE
;
163 static enum dump_method dump_method
= DUMP_METHOD_NONE
;
164 static struct ipl_parameter_block
*dump_block_fcp
;
165 static struct ipl_parameter_block
*dump_block_ccw
;
167 static struct sclp_ipl_info sclp_ipl_info
;
169 int diag308(unsigned long subcode
, void *addr
)
171 register unsigned long _addr
asm("0") = (unsigned long) addr
;
172 register unsigned long _rc
asm("1") = 0;
175 " diag %0,%2,0x308\n"
178 : "+d" (_addr
), "+d" (_rc
)
179 : "d" (subcode
) : "cc", "memory");
182 EXPORT_SYMBOL_GPL(diag308
);
186 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
187 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
188 struct kobj_attribute *attr, \
191 return sprintf(page, _format, _value); \
193 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
194 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL);
196 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
197 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
198 struct kobj_attribute *attr, \
201 return sprintf(page, _fmt_out, \
202 (unsigned long long) _value); \
204 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
205 struct kobj_attribute *attr, \
206 const char *buf, size_t len) \
208 unsigned long long value; \
209 if (sscanf(buf, _fmt_in, &value) != 1) \
214 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
215 __ATTR(_name,(S_IRUGO | S_IWUSR), \
216 sys_##_prefix##_##_name##_show, \
217 sys_##_prefix##_##_name##_store);
219 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
220 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
221 struct kobj_attribute *attr, \
224 return sprintf(page, _fmt_out, _value); \
226 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
227 struct kobj_attribute *attr, \
228 const char *buf, size_t len) \
230 strncpy(_value, buf, sizeof(_value) - 1); \
234 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
235 __ATTR(_name,(S_IRUGO | S_IWUSR), \
236 sys_##_prefix##_##_name##_show, \
237 sys_##_prefix##_##_name##_store);
239 static void make_attrs_ro(struct attribute
**attrs
)
242 (*attrs
)->mode
= S_IRUGO
;
251 static __init
enum ipl_type
get_ipl_type(void)
253 struct ipl_parameter_block
*ipl
= IPL_PARMBLOCK_START
;
255 if (ipl_flags
& IPL_NSS_VALID
)
257 if (!(ipl_flags
& IPL_DEVNO_VALID
))
258 return IPL_TYPE_UNKNOWN
;
259 if (!(ipl_flags
& IPL_PARMBLOCK_VALID
))
261 if (ipl
->hdr
.version
> IPL_MAX_SUPPORTED_VERSION
)
262 return IPL_TYPE_UNKNOWN
;
263 if (ipl
->hdr
.pbt
!= DIAG308_IPL_TYPE_FCP
)
264 return IPL_TYPE_UNKNOWN
;
265 if (ipl
->ipl_info
.fcp
.opt
== DIAG308_IPL_OPT_DUMP
)
266 return IPL_TYPE_FCP_DUMP
;
270 struct ipl_info ipl_info
;
271 EXPORT_SYMBOL_GPL(ipl_info
);
273 static ssize_t
ipl_type_show(struct kobject
*kobj
, struct kobj_attribute
*attr
,
276 return sprintf(page
, "%s\n", ipl_type_str(ipl_info
.type
));
279 static struct kobj_attribute sys_ipl_type_attr
= __ATTR_RO(ipl_type
);
281 /* VM IPL PARM routines */
282 static size_t reipl_get_ascii_vmparm(char *dest
, size_t size
,
283 const struct ipl_parameter_block
*ipb
)
287 char has_lowercase
= 0;
290 if ((ipb
->ipl_info
.ccw
.vm_flags
& DIAG308_VM_FLAGS_VP_VALID
) &&
291 (ipb
->ipl_info
.ccw
.vm_parm_len
> 0)) {
293 len
= min_t(size_t, size
- 1, ipb
->ipl_info
.ccw
.vm_parm_len
);
294 memcpy(dest
, ipb
->ipl_info
.ccw
.vm_parm
, len
);
295 /* If at least one character is lowercase, we assume mixed
296 * case; otherwise we convert everything to lowercase.
298 for (i
= 0; i
< len
; i
++)
299 if ((dest
[i
] > 0x80 && dest
[i
] < 0x8a) || /* a-i */
300 (dest
[i
] > 0x90 && dest
[i
] < 0x9a) || /* j-r */
301 (dest
[i
] > 0xa1 && dest
[i
] < 0xaa)) { /* s-z */
306 EBC_TOLOWER(dest
, len
);
314 size_t append_ipl_vmparm(char *dest
, size_t size
)
319 if (diag308_set_works
&& (ipl_block
.hdr
.pbt
== DIAG308_IPL_TYPE_CCW
))
320 rc
= reipl_get_ascii_vmparm(dest
, size
, &ipl_block
);
326 static ssize_t
ipl_vm_parm_show(struct kobject
*kobj
,
327 struct kobj_attribute
*attr
, char *page
)
329 char parm
[DIAG308_VMPARM_SIZE
+ 1] = {};
331 append_ipl_vmparm(parm
, sizeof(parm
));
332 return sprintf(page
, "%s\n", parm
);
335 static size_t scpdata_length(const char* buf
, size_t count
)
338 if (buf
[count
- 1] != '\0' && buf
[count
- 1] != ' ')
345 static size_t reipl_append_ascii_scpdata(char *dest
, size_t size
,
346 const struct ipl_parameter_block
*ipb
)
352 count
= min(size
- 1, scpdata_length(ipb
->ipl_info
.fcp
.scp_data
,
353 ipb
->ipl_info
.fcp
.scp_data_len
));
358 for (i
= 0; i
< count
; i
++) {
359 if (!isascii(ipb
->ipl_info
.fcp
.scp_data
[i
])) {
363 if (!has_lowercase
&& islower(ipb
->ipl_info
.fcp
.scp_data
[i
]))
368 memcpy(dest
, ipb
->ipl_info
.fcp
.scp_data
, count
);
370 for (i
= 0; i
< count
; i
++)
371 dest
[i
] = tolower(ipb
->ipl_info
.fcp
.scp_data
[i
]);
377 size_t append_ipl_scpdata(char *dest
, size_t len
)
382 if (ipl_block
.hdr
.pbt
== DIAG308_IPL_TYPE_FCP
)
383 rc
= reipl_append_ascii_scpdata(dest
, len
, &ipl_block
);
390 static struct kobj_attribute sys_ipl_vm_parm_attr
=
391 __ATTR(parm
, S_IRUGO
, ipl_vm_parm_show
, NULL
);
393 static ssize_t
sys_ipl_device_show(struct kobject
*kobj
,
394 struct kobj_attribute
*attr
, char *page
)
396 struct ipl_parameter_block
*ipl
= IPL_PARMBLOCK_START
;
398 switch (ipl_info
.type
) {
400 return sprintf(page
, "0.0.%04x\n", ipl_devno
);
402 case IPL_TYPE_FCP_DUMP
:
403 return sprintf(page
, "0.0.%04x\n", ipl
->ipl_info
.fcp
.devno
);
409 static struct kobj_attribute sys_ipl_device_attr
=
410 __ATTR(device
, S_IRUGO
, sys_ipl_device_show
, NULL
);
412 static ssize_t
ipl_parameter_read(struct file
*filp
, struct kobject
*kobj
,
413 struct bin_attribute
*attr
, char *buf
,
414 loff_t off
, size_t count
)
416 return memory_read_from_buffer(buf
, count
, &off
, IPL_PARMBLOCK_START
,
420 static struct bin_attribute ipl_parameter_attr
= {
422 .name
= "binary_parameter",
426 .read
= &ipl_parameter_read
,
429 static ssize_t
ipl_scp_data_read(struct file
*filp
, struct kobject
*kobj
,
430 struct bin_attribute
*attr
, char *buf
,
431 loff_t off
, size_t count
)
433 unsigned int size
= IPL_PARMBLOCK_START
->ipl_info
.fcp
.scp_data_len
;
434 void *scp_data
= &IPL_PARMBLOCK_START
->ipl_info
.fcp
.scp_data
;
436 return memory_read_from_buffer(buf
, count
, &off
, scp_data
, size
);
439 static struct bin_attribute ipl_scp_data_attr
= {
445 .read
= ipl_scp_data_read
,
448 /* FCP ipl device attributes */
450 DEFINE_IPL_ATTR_RO(ipl_fcp
, wwpn
, "0x%016llx\n", (unsigned long long)
451 IPL_PARMBLOCK_START
->ipl_info
.fcp
.wwpn
);
452 DEFINE_IPL_ATTR_RO(ipl_fcp
, lun
, "0x%016llx\n", (unsigned long long)
453 IPL_PARMBLOCK_START
->ipl_info
.fcp
.lun
);
454 DEFINE_IPL_ATTR_RO(ipl_fcp
, bootprog
, "%lld\n", (unsigned long long)
455 IPL_PARMBLOCK_START
->ipl_info
.fcp
.bootprog
);
456 DEFINE_IPL_ATTR_RO(ipl_fcp
, br_lba
, "%lld\n", (unsigned long long)
457 IPL_PARMBLOCK_START
->ipl_info
.fcp
.br_lba
);
459 static struct attribute
*ipl_fcp_attrs
[] = {
460 &sys_ipl_type_attr
.attr
,
461 &sys_ipl_device_attr
.attr
,
462 &sys_ipl_fcp_wwpn_attr
.attr
,
463 &sys_ipl_fcp_lun_attr
.attr
,
464 &sys_ipl_fcp_bootprog_attr
.attr
,
465 &sys_ipl_fcp_br_lba_attr
.attr
,
469 static struct attribute_group ipl_fcp_attr_group
= {
470 .attrs
= ipl_fcp_attrs
,
473 /* CCW ipl device attributes */
475 static ssize_t
ipl_ccw_loadparm_show(struct kobject
*kobj
,
476 struct kobj_attribute
*attr
, char *page
)
478 char loadparm
[LOADPARM_LEN
+ 1] = {};
480 if (!sclp_ipl_info
.is_valid
)
481 return sprintf(page
, "#unknown#\n");
482 memcpy(loadparm
, &sclp_ipl_info
.loadparm
, LOADPARM_LEN
);
483 EBCASC(loadparm
, LOADPARM_LEN
);
485 return sprintf(page
, "%s\n", loadparm
);
488 static struct kobj_attribute sys_ipl_ccw_loadparm_attr
=
489 __ATTR(loadparm
, 0444, ipl_ccw_loadparm_show
, NULL
);
491 static struct attribute
*ipl_ccw_attrs_vm
[] = {
492 &sys_ipl_type_attr
.attr
,
493 &sys_ipl_device_attr
.attr
,
494 &sys_ipl_ccw_loadparm_attr
.attr
,
495 &sys_ipl_vm_parm_attr
.attr
,
499 static struct attribute
*ipl_ccw_attrs_lpar
[] = {
500 &sys_ipl_type_attr
.attr
,
501 &sys_ipl_device_attr
.attr
,
502 &sys_ipl_ccw_loadparm_attr
.attr
,
506 static struct attribute_group ipl_ccw_attr_group_vm
= {
507 .attrs
= ipl_ccw_attrs_vm
,
510 static struct attribute_group ipl_ccw_attr_group_lpar
= {
511 .attrs
= ipl_ccw_attrs_lpar
514 /* NSS ipl device attributes */
516 DEFINE_IPL_ATTR_RO(ipl_nss
, name
, "%s\n", kernel_nss_name
);
518 static struct attribute
*ipl_nss_attrs
[] = {
519 &sys_ipl_type_attr
.attr
,
520 &sys_ipl_nss_name_attr
.attr
,
521 &sys_ipl_ccw_loadparm_attr
.attr
,
522 &sys_ipl_vm_parm_attr
.attr
,
526 static struct attribute_group ipl_nss_attr_group
= {
527 .attrs
= ipl_nss_attrs
,
530 /* UNKNOWN ipl device attributes */
532 static struct attribute
*ipl_unknown_attrs
[] = {
533 &sys_ipl_type_attr
.attr
,
537 static struct attribute_group ipl_unknown_attr_group
= {
538 .attrs
= ipl_unknown_attrs
,
541 static struct kset
*ipl_kset
;
543 static int __init
ipl_register_fcp_files(void)
547 rc
= sysfs_create_group(&ipl_kset
->kobj
, &ipl_fcp_attr_group
);
550 rc
= sysfs_create_bin_file(&ipl_kset
->kobj
, &ipl_parameter_attr
);
553 rc
= sysfs_create_bin_file(&ipl_kset
->kobj
, &ipl_scp_data_attr
);
557 sysfs_remove_bin_file(&ipl_kset
->kobj
, &ipl_parameter_attr
);
560 sysfs_remove_group(&ipl_kset
->kobj
, &ipl_fcp_attr_group
);
565 static void __ipl_run(void *unused
)
567 diag308(DIAG308_IPL
, 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
= ipl_register_fcp_files();
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
)
725 if (off
>= DIAG308_SCPDATA_SIZE
)
728 if (count
> DIAG308_SCPDATA_SIZE
- off
)
729 count
= DIAG308_SCPDATA_SIZE
- off
;
731 memcpy(reipl_block_fcp
->ipl_info
.fcp
.scp_data
, buf
+ off
, count
);
732 scpdata_len
= off
+ count
;
734 if (scpdata_len
% 8) {
735 padding
= 8 - (scpdata_len
% 8);
736 memset(reipl_block_fcp
->ipl_info
.fcp
.scp_data
+ scpdata_len
,
738 scpdata_len
+= padding
;
741 reipl_block_fcp
->ipl_info
.fcp
.scp_data_len
= scpdata_len
;
742 reipl_block_fcp
->hdr
.len
= IPL_PARM_BLK_FCP_LEN
+ scpdata_len
;
743 reipl_block_fcp
->hdr
.blk0_len
= IPL_PARM_BLK0_FCP_LEN
+ scpdata_len
;
748 static struct bin_attribute sys_reipl_fcp_scp_data_attr
= {
751 .mode
= S_IRUGO
| S_IWUSR
,
754 .read
= reipl_fcp_scpdata_read
,
755 .write
= reipl_fcp_scpdata_write
,
758 DEFINE_IPL_ATTR_RW(reipl_fcp
, wwpn
, "0x%016llx\n", "%016llx\n",
759 reipl_block_fcp
->ipl_info
.fcp
.wwpn
);
760 DEFINE_IPL_ATTR_RW(reipl_fcp
, lun
, "0x%016llx\n", "%016llx\n",
761 reipl_block_fcp
->ipl_info
.fcp
.lun
);
762 DEFINE_IPL_ATTR_RW(reipl_fcp
, bootprog
, "%lld\n", "%lld\n",
763 reipl_block_fcp
->ipl_info
.fcp
.bootprog
);
764 DEFINE_IPL_ATTR_RW(reipl_fcp
, br_lba
, "%lld\n", "%lld\n",
765 reipl_block_fcp
->ipl_info
.fcp
.br_lba
);
766 DEFINE_IPL_ATTR_RW(reipl_fcp
, device
, "0.0.%04llx\n", "0.0.%llx\n",
767 reipl_block_fcp
->ipl_info
.fcp
.devno
);
769 static struct attribute
*reipl_fcp_attrs
[] = {
770 &sys_reipl_fcp_device_attr
.attr
,
771 &sys_reipl_fcp_wwpn_attr
.attr
,
772 &sys_reipl_fcp_lun_attr
.attr
,
773 &sys_reipl_fcp_bootprog_attr
.attr
,
774 &sys_reipl_fcp_br_lba_attr
.attr
,
778 static struct attribute_group reipl_fcp_attr_group
= {
779 .attrs
= reipl_fcp_attrs
,
782 /* CCW reipl device attributes */
784 DEFINE_IPL_ATTR_RW(reipl_ccw
, device
, "0.0.%04llx\n", "0.0.%llx\n",
785 reipl_block_ccw
->ipl_info
.ccw
.devno
);
787 static void reipl_get_ascii_loadparm(char *loadparm
,
788 struct ipl_parameter_block
*ibp
)
790 memcpy(loadparm
, ibp
->ipl_info
.ccw
.load_parm
, LOADPARM_LEN
);
791 EBCASC(loadparm
, LOADPARM_LEN
);
792 loadparm
[LOADPARM_LEN
] = 0;
796 static ssize_t
reipl_generic_loadparm_show(struct ipl_parameter_block
*ipb
,
799 char buf
[LOADPARM_LEN
+ 1];
801 reipl_get_ascii_loadparm(buf
, ipb
);
802 return sprintf(page
, "%s\n", buf
);
805 static ssize_t
reipl_generic_loadparm_store(struct ipl_parameter_block
*ipb
,
806 const char *buf
, size_t len
)
810 /* ignore trailing newline */
812 if ((len
> 0) && (buf
[len
- 1] == '\n'))
814 /* loadparm can have max 8 characters and must not start with a blank */
815 if ((lp_len
> LOADPARM_LEN
) || ((lp_len
> 0) && (buf
[0] == ' ')))
817 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
818 for (i
= 0; i
< lp_len
; i
++) {
819 if (isalpha(buf
[i
]) || isdigit(buf
[i
]) || (buf
[i
] == ' ') ||
824 /* initialize loadparm with blanks */
825 memset(ipb
->ipl_info
.ccw
.load_parm
, ' ', LOADPARM_LEN
);
826 /* copy and convert to ebcdic */
827 memcpy(ipb
->ipl_info
.ccw
.load_parm
, buf
, lp_len
);
828 ASCEBC(ipb
->ipl_info
.ccw
.load_parm
, LOADPARM_LEN
);
833 static ssize_t
reipl_nss_loadparm_show(struct kobject
*kobj
,
834 struct kobj_attribute
*attr
, char *page
)
836 return reipl_generic_loadparm_show(reipl_block_nss
, page
);
839 static ssize_t
reipl_nss_loadparm_store(struct kobject
*kobj
,
840 struct kobj_attribute
*attr
,
841 const char *buf
, size_t len
)
843 return reipl_generic_loadparm_store(reipl_block_nss
, buf
, len
);
847 static ssize_t
reipl_ccw_loadparm_show(struct kobject
*kobj
,
848 struct kobj_attribute
*attr
, char *page
)
850 return reipl_generic_loadparm_show(reipl_block_ccw
, page
);
853 static ssize_t
reipl_ccw_loadparm_store(struct kobject
*kobj
,
854 struct kobj_attribute
*attr
,
855 const char *buf
, size_t len
)
857 return reipl_generic_loadparm_store(reipl_block_ccw
, buf
, len
);
860 static struct kobj_attribute sys_reipl_ccw_loadparm_attr
=
861 __ATTR(loadparm
, S_IRUGO
| S_IWUSR
, reipl_ccw_loadparm_show
,
862 reipl_ccw_loadparm_store
);
864 static struct attribute
*reipl_ccw_attrs_vm
[] = {
865 &sys_reipl_ccw_device_attr
.attr
,
866 &sys_reipl_ccw_loadparm_attr
.attr
,
867 &sys_reipl_ccw_vmparm_attr
.attr
,
871 static struct attribute
*reipl_ccw_attrs_lpar
[] = {
872 &sys_reipl_ccw_device_attr
.attr
,
873 &sys_reipl_ccw_loadparm_attr
.attr
,
877 static struct attribute_group reipl_ccw_attr_group_vm
= {
879 .attrs
= reipl_ccw_attrs_vm
,
882 static struct attribute_group reipl_ccw_attr_group_lpar
= {
884 .attrs
= reipl_ccw_attrs_lpar
,
888 /* NSS reipl device attributes */
889 static void reipl_get_ascii_nss_name(char *dst
,
890 struct ipl_parameter_block
*ipb
)
892 memcpy(dst
, ipb
->ipl_info
.ccw
.nss_name
, NSS_NAME_SIZE
);
893 EBCASC(dst
, NSS_NAME_SIZE
);
894 dst
[NSS_NAME_SIZE
] = 0;
897 static ssize_t
reipl_nss_name_show(struct kobject
*kobj
,
898 struct kobj_attribute
*attr
, char *page
)
900 char nss_name
[NSS_NAME_SIZE
+ 1] = {};
902 reipl_get_ascii_nss_name(nss_name
, reipl_block_nss
);
903 return sprintf(page
, "%s\n", nss_name
);
906 static ssize_t
reipl_nss_name_store(struct kobject
*kobj
,
907 struct kobj_attribute
*attr
,
908 const char *buf
, size_t len
)
912 /* ignore trailing newline */
914 if ((len
> 0) && (buf
[len
- 1] == '\n'))
917 if (nss_len
> NSS_NAME_SIZE
)
920 memset(reipl_block_nss
->ipl_info
.ccw
.nss_name
, 0x40, NSS_NAME_SIZE
);
922 reipl_block_nss
->ipl_info
.ccw
.vm_flags
|=
923 DIAG308_VM_FLAGS_NSS_VALID
;
924 memcpy(reipl_block_nss
->ipl_info
.ccw
.nss_name
, buf
, nss_len
);
925 ASCEBC(reipl_block_nss
->ipl_info
.ccw
.nss_name
, nss_len
);
926 EBC_TOUPPER(reipl_block_nss
->ipl_info
.ccw
.nss_name
, nss_len
);
928 reipl_block_nss
->ipl_info
.ccw
.vm_flags
&=
929 ~DIAG308_VM_FLAGS_NSS_VALID
;
935 static struct kobj_attribute sys_reipl_nss_name_attr
=
936 __ATTR(name
, S_IRUGO
| S_IWUSR
, reipl_nss_name_show
,
937 reipl_nss_name_store
);
939 static struct kobj_attribute sys_reipl_nss_loadparm_attr
=
940 __ATTR(loadparm
, S_IRUGO
| S_IWUSR
, reipl_nss_loadparm_show
,
941 reipl_nss_loadparm_store
);
943 static struct attribute
*reipl_nss_attrs
[] = {
944 &sys_reipl_nss_name_attr
.attr
,
945 &sys_reipl_nss_loadparm_attr
.attr
,
946 &sys_reipl_nss_vmparm_attr
.attr
,
950 static struct attribute_group reipl_nss_attr_group
= {
952 .attrs
= reipl_nss_attrs
,
955 static void set_reipl_block_actual(struct ipl_parameter_block
*reipl_block
)
957 reipl_block_actual
= reipl_block
;
958 os_info_entry_add(OS_INFO_REIPL_BLOCK
, reipl_block_actual
,
959 reipl_block
->hdr
.len
);
964 static int reipl_set_type(enum ipl_type type
)
966 if (!(reipl_capabilities
& type
))
971 if (diag308_set_works
)
972 reipl_method
= REIPL_METHOD_CCW_DIAG
;
973 else if (MACHINE_IS_VM
)
974 reipl_method
= REIPL_METHOD_CCW_VM
;
976 reipl_method
= REIPL_METHOD_CCW_CIO
;
977 set_reipl_block_actual(reipl_block_ccw
);
980 if (diag308_set_works
)
981 reipl_method
= REIPL_METHOD_FCP_RW_DIAG
;
982 else if (MACHINE_IS_VM
)
983 reipl_method
= REIPL_METHOD_FCP_RO_VM
;
985 reipl_method
= REIPL_METHOD_FCP_RO_DIAG
;
986 set_reipl_block_actual(reipl_block_fcp
);
988 case IPL_TYPE_FCP_DUMP
:
989 reipl_method
= REIPL_METHOD_FCP_DUMP
;
992 if (diag308_set_works
)
993 reipl_method
= REIPL_METHOD_NSS_DIAG
;
995 reipl_method
= REIPL_METHOD_NSS
;
996 set_reipl_block_actual(reipl_block_nss
);
998 case IPL_TYPE_UNKNOWN
:
999 reipl_method
= REIPL_METHOD_DEFAULT
;
1008 static ssize_t
reipl_type_show(struct kobject
*kobj
,
1009 struct kobj_attribute
*attr
, char *page
)
1011 return sprintf(page
, "%s\n", ipl_type_str(reipl_type
));
1014 static ssize_t
reipl_type_store(struct kobject
*kobj
,
1015 struct kobj_attribute
*attr
,
1016 const char *buf
, size_t len
)
1020 if (strncmp(buf
, IPL_CCW_STR
, strlen(IPL_CCW_STR
)) == 0)
1021 rc
= reipl_set_type(IPL_TYPE_CCW
);
1022 else if (strncmp(buf
, IPL_FCP_STR
, strlen(IPL_FCP_STR
)) == 0)
1023 rc
= reipl_set_type(IPL_TYPE_FCP
);
1024 else if (strncmp(buf
, IPL_NSS_STR
, strlen(IPL_NSS_STR
)) == 0)
1025 rc
= reipl_set_type(IPL_TYPE_NSS
);
1026 return (rc
!= 0) ? rc
: len
;
1029 static struct kobj_attribute reipl_type_attr
=
1030 __ATTR(reipl_type
, 0644, reipl_type_show
, reipl_type_store
);
1032 static struct kset
*reipl_kset
;
1033 static struct kset
*reipl_fcp_kset
;
1035 static void get_ipl_string(char *dst
, struct ipl_parameter_block
*ipb
,
1036 const enum ipl_method m
)
1038 char loadparm
[LOADPARM_LEN
+ 1] = {};
1039 char vmparm
[DIAG308_VMPARM_SIZE
+ 1] = {};
1040 char nss_name
[NSS_NAME_SIZE
+ 1] = {};
1043 reipl_get_ascii_loadparm(loadparm
, ipb
);
1044 reipl_get_ascii_nss_name(nss_name
, ipb
);
1045 reipl_get_ascii_vmparm(vmparm
, sizeof(vmparm
), ipb
);
1048 case REIPL_METHOD_CCW_VM
:
1049 pos
= sprintf(dst
, "IPL %X CLEAR", ipb
->ipl_info
.ccw
.devno
);
1051 case REIPL_METHOD_NSS
:
1052 pos
= sprintf(dst
, "IPL %s", nss_name
);
1057 if (strlen(loadparm
) > 0)
1058 pos
+= sprintf(dst
+ pos
, " LOADPARM '%s'", loadparm
);
1059 if (strlen(vmparm
) > 0)
1060 sprintf(dst
+ pos
, " PARM %s", vmparm
);
1063 static void __reipl_run(void *unused
)
1065 struct ccw_dev_id devid
;
1066 static char buf
[128];
1068 switch (reipl_method
) {
1069 case REIPL_METHOD_CCW_CIO
:
1070 devid
.devno
= reipl_block_ccw
->ipl_info
.ccw
.devno
;
1072 reipl_ccw_dev(&devid
);
1074 case REIPL_METHOD_CCW_VM
:
1075 get_ipl_string(buf
, reipl_block_ccw
, REIPL_METHOD_CCW_VM
);
1076 __cpcmd(buf
, NULL
, 0, NULL
);
1078 case REIPL_METHOD_CCW_DIAG
:
1079 diag308(DIAG308_SET
, reipl_block_ccw
);
1080 diag308(DIAG308_IPL
, NULL
);
1082 case REIPL_METHOD_FCP_RW_DIAG
:
1083 diag308(DIAG308_SET
, reipl_block_fcp
);
1084 diag308(DIAG308_IPL
, NULL
);
1086 case REIPL_METHOD_FCP_RO_DIAG
:
1087 diag308(DIAG308_IPL
, NULL
);
1089 case REIPL_METHOD_FCP_RO_VM
:
1090 __cpcmd("IPL", NULL
, 0, NULL
);
1092 case REIPL_METHOD_NSS_DIAG
:
1093 diag308(DIAG308_SET
, reipl_block_nss
);
1094 diag308(DIAG308_IPL
, NULL
);
1096 case REIPL_METHOD_NSS
:
1097 get_ipl_string(buf
, reipl_block_nss
, REIPL_METHOD_NSS
);
1098 __cpcmd(buf
, NULL
, 0, NULL
);
1100 case REIPL_METHOD_DEFAULT
:
1102 __cpcmd("IPL", NULL
, 0, NULL
);
1103 diag308(DIAG308_IPL
, NULL
);
1105 case REIPL_METHOD_FCP_DUMP
:
1108 disabled_wait((unsigned long) __builtin_return_address(0));
1111 static void reipl_run(struct shutdown_trigger
*trigger
)
1113 smp_call_ipl_cpu(__reipl_run
, NULL
);
1116 static void reipl_block_ccw_init(struct ipl_parameter_block
*ipb
)
1118 ipb
->hdr
.len
= IPL_PARM_BLK_CCW_LEN
;
1119 ipb
->hdr
.version
= IPL_PARM_BLOCK_VERSION
;
1120 ipb
->hdr
.blk0_len
= IPL_PARM_BLK0_CCW_LEN
;
1121 ipb
->hdr
.pbt
= DIAG308_IPL_TYPE_CCW
;
1124 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block
*ipb
)
1127 /* check if read scp info worked and set loadparm */
1128 if (sclp_ipl_info
.is_valid
)
1129 memcpy(ipb
->ipl_info
.ccw
.load_parm
,
1130 &sclp_ipl_info
.loadparm
, LOADPARM_LEN
);
1132 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1133 memset(ipb
->ipl_info
.ccw
.load_parm
, 0x40, LOADPARM_LEN
);
1134 ipb
->hdr
.flags
= DIAG308_FLAGS_LP_VALID
;
1137 if (MACHINE_IS_VM
&& diag308_set_works
&&
1138 (ipl_block
.ipl_info
.ccw
.vm_flags
& DIAG308_VM_FLAGS_VP_VALID
)) {
1140 ipb
->ipl_info
.ccw
.vm_flags
|= DIAG308_VM_FLAGS_VP_VALID
;
1141 ipb
->ipl_info
.ccw
.vm_parm_len
=
1142 ipl_block
.ipl_info
.ccw
.vm_parm_len
;
1143 memcpy(ipb
->ipl_info
.ccw
.vm_parm
,
1144 ipl_block
.ipl_info
.ccw
.vm_parm
, DIAG308_VMPARM_SIZE
);
1148 static int __init
reipl_nss_init(void)
1155 reipl_block_nss
= (void *) get_zeroed_page(GFP_KERNEL
);
1156 if (!reipl_block_nss
)
1159 if (!diag308_set_works
)
1160 sys_reipl_nss_vmparm_attr
.attr
.mode
= S_IRUGO
;
1162 rc
= sysfs_create_group(&reipl_kset
->kobj
, &reipl_nss_attr_group
);
1166 reipl_block_ccw_init(reipl_block_nss
);
1167 if (ipl_info
.type
== IPL_TYPE_NSS
) {
1168 memset(reipl_block_nss
->ipl_info
.ccw
.nss_name
,
1169 ' ', NSS_NAME_SIZE
);
1170 memcpy(reipl_block_nss
->ipl_info
.ccw
.nss_name
,
1171 kernel_nss_name
, strlen(kernel_nss_name
));
1172 ASCEBC(reipl_block_nss
->ipl_info
.ccw
.nss_name
, NSS_NAME_SIZE
);
1173 reipl_block_nss
->ipl_info
.ccw
.vm_flags
|=
1174 DIAG308_VM_FLAGS_NSS_VALID
;
1176 reipl_block_ccw_fill_parms(reipl_block_nss
);
1179 reipl_capabilities
|= IPL_TYPE_NSS
;
1183 static int __init
reipl_ccw_init(void)
1187 reipl_block_ccw
= (void *) get_zeroed_page(GFP_KERNEL
);
1188 if (!reipl_block_ccw
)
1191 if (MACHINE_IS_VM
) {
1192 if (!diag308_set_works
)
1193 sys_reipl_ccw_vmparm_attr
.attr
.mode
= S_IRUGO
;
1194 rc
= sysfs_create_group(&reipl_kset
->kobj
,
1195 &reipl_ccw_attr_group_vm
);
1197 if(!diag308_set_works
)
1198 sys_reipl_ccw_loadparm_attr
.attr
.mode
= S_IRUGO
;
1199 rc
= sysfs_create_group(&reipl_kset
->kobj
,
1200 &reipl_ccw_attr_group_lpar
);
1205 reipl_block_ccw_init(reipl_block_ccw
);
1206 if (ipl_info
.type
== IPL_TYPE_CCW
) {
1207 reipl_block_ccw
->ipl_info
.ccw
.devno
= ipl_devno
;
1208 reipl_block_ccw_fill_parms(reipl_block_ccw
);
1211 reipl_capabilities
|= IPL_TYPE_CCW
;
1215 static int __init
reipl_fcp_init(void)
1219 if (!diag308_set_works
) {
1220 if (ipl_info
.type
== IPL_TYPE_FCP
) {
1221 make_attrs_ro(reipl_fcp_attrs
);
1222 sys_reipl_fcp_scp_data_attr
.attr
.mode
= S_IRUGO
;
1227 reipl_block_fcp
= (void *) get_zeroed_page(GFP_KERNEL
);
1228 if (!reipl_block_fcp
)
1231 /* sysfs: create fcp kset for mixing attr group and bin attrs */
1232 reipl_fcp_kset
= kset_create_and_add(IPL_FCP_STR
, NULL
,
1234 if (!reipl_fcp_kset
) {
1235 free_page((unsigned long) reipl_block_fcp
);
1239 rc
= sysfs_create_group(&reipl_fcp_kset
->kobj
, &reipl_fcp_attr_group
);
1241 kset_unregister(reipl_fcp_kset
);
1242 free_page((unsigned long) reipl_block_fcp
);
1246 rc
= sysfs_create_bin_file(&reipl_fcp_kset
->kobj
,
1247 &sys_reipl_fcp_scp_data_attr
);
1249 sysfs_remove_group(&reipl_fcp_kset
->kobj
, &reipl_fcp_attr_group
);
1250 kset_unregister(reipl_fcp_kset
);
1251 free_page((unsigned long) reipl_block_fcp
);
1255 if (ipl_info
.type
== IPL_TYPE_FCP
)
1256 memcpy(reipl_block_fcp
, IPL_PARMBLOCK_START
, PAGE_SIZE
);
1258 reipl_block_fcp
->hdr
.len
= IPL_PARM_BLK_FCP_LEN
;
1259 reipl_block_fcp
->hdr
.version
= IPL_PARM_BLOCK_VERSION
;
1260 reipl_block_fcp
->hdr
.blk0_len
= IPL_PARM_BLK0_FCP_LEN
;
1261 reipl_block_fcp
->hdr
.pbt
= DIAG308_IPL_TYPE_FCP
;
1262 reipl_block_fcp
->ipl_info
.fcp
.opt
= DIAG308_IPL_OPT_IPL
;
1264 reipl_capabilities
|= IPL_TYPE_FCP
;
1268 static int __init
reipl_type_init(void)
1270 enum ipl_type reipl_type
= ipl_info
.type
;
1271 struct ipl_parameter_block
*reipl_block
;
1274 reipl_block
= os_info_old_entry(OS_INFO_REIPL_BLOCK
, &size
);
1278 * If we have an OS info reipl block, this will be used
1280 if (reipl_block
->hdr
.pbt
== DIAG308_IPL_TYPE_FCP
) {
1281 memcpy(reipl_block_fcp
, reipl_block
, size
);
1282 reipl_type
= IPL_TYPE_FCP
;
1283 } else if (reipl_block
->hdr
.pbt
== DIAG308_IPL_TYPE_CCW
) {
1284 memcpy(reipl_block_ccw
, reipl_block
, size
);
1285 reipl_type
= IPL_TYPE_CCW
;
1288 return reipl_set_type(reipl_type
);
1291 static int __init
reipl_init(void)
1295 reipl_kset
= kset_create_and_add("reipl", NULL
, firmware_kobj
);
1298 rc
= sysfs_create_file(&reipl_kset
->kobj
, &reipl_type_attr
.attr
);
1300 kset_unregister(reipl_kset
);
1303 rc
= reipl_ccw_init();
1306 rc
= reipl_fcp_init();
1309 rc
= reipl_nss_init();
1312 return reipl_type_init();
1315 static struct shutdown_action __refdata reipl_action
= {
1316 .name
= SHUTDOWN_ACTION_REIPL_STR
,
1322 * dump shutdown action: Dump Linux on shutdown.
1325 /* FCP dump device attributes */
1327 DEFINE_IPL_ATTR_RW(dump_fcp
, wwpn
, "0x%016llx\n", "%016llx\n",
1328 dump_block_fcp
->ipl_info
.fcp
.wwpn
);
1329 DEFINE_IPL_ATTR_RW(dump_fcp
, lun
, "0x%016llx\n", "%016llx\n",
1330 dump_block_fcp
->ipl_info
.fcp
.lun
);
1331 DEFINE_IPL_ATTR_RW(dump_fcp
, bootprog
, "%lld\n", "%lld\n",
1332 dump_block_fcp
->ipl_info
.fcp
.bootprog
);
1333 DEFINE_IPL_ATTR_RW(dump_fcp
, br_lba
, "%lld\n", "%lld\n",
1334 dump_block_fcp
->ipl_info
.fcp
.br_lba
);
1335 DEFINE_IPL_ATTR_RW(dump_fcp
, device
, "0.0.%04llx\n", "0.0.%llx\n",
1336 dump_block_fcp
->ipl_info
.fcp
.devno
);
1338 static struct attribute
*dump_fcp_attrs
[] = {
1339 &sys_dump_fcp_device_attr
.attr
,
1340 &sys_dump_fcp_wwpn_attr
.attr
,
1341 &sys_dump_fcp_lun_attr
.attr
,
1342 &sys_dump_fcp_bootprog_attr
.attr
,
1343 &sys_dump_fcp_br_lba_attr
.attr
,
1347 static struct attribute_group dump_fcp_attr_group
= {
1348 .name
= IPL_FCP_STR
,
1349 .attrs
= dump_fcp_attrs
,
1352 /* CCW dump device attributes */
1354 DEFINE_IPL_ATTR_RW(dump_ccw
, device
, "0.0.%04llx\n", "0.0.%llx\n",
1355 dump_block_ccw
->ipl_info
.ccw
.devno
);
1357 static struct attribute
*dump_ccw_attrs
[] = {
1358 &sys_dump_ccw_device_attr
.attr
,
1362 static struct attribute_group dump_ccw_attr_group
= {
1363 .name
= IPL_CCW_STR
,
1364 .attrs
= dump_ccw_attrs
,
1369 static int dump_set_type(enum dump_type type
)
1371 if (!(dump_capabilities
& type
))
1375 if (diag308_set_works
)
1376 dump_method
= DUMP_METHOD_CCW_DIAG
;
1377 else if (MACHINE_IS_VM
)
1378 dump_method
= DUMP_METHOD_CCW_VM
;
1380 dump_method
= DUMP_METHOD_CCW_CIO
;
1383 dump_method
= DUMP_METHOD_FCP_DIAG
;
1386 dump_method
= DUMP_METHOD_NONE
;
1392 static ssize_t
dump_type_show(struct kobject
*kobj
,
1393 struct kobj_attribute
*attr
, char *page
)
1395 return sprintf(page
, "%s\n", dump_type_str(dump_type
));
1398 static ssize_t
dump_type_store(struct kobject
*kobj
,
1399 struct kobj_attribute
*attr
,
1400 const char *buf
, size_t len
)
1404 if (strncmp(buf
, DUMP_NONE_STR
, strlen(DUMP_NONE_STR
)) == 0)
1405 rc
= dump_set_type(DUMP_TYPE_NONE
);
1406 else if (strncmp(buf
, DUMP_CCW_STR
, strlen(DUMP_CCW_STR
)) == 0)
1407 rc
= dump_set_type(DUMP_TYPE_CCW
);
1408 else if (strncmp(buf
, DUMP_FCP_STR
, strlen(DUMP_FCP_STR
)) == 0)
1409 rc
= dump_set_type(DUMP_TYPE_FCP
);
1410 return (rc
!= 0) ? rc
: len
;
1413 static struct kobj_attribute dump_type_attr
=
1414 __ATTR(dump_type
, 0644, dump_type_show
, dump_type_store
);
1416 static struct kset
*dump_kset
;
1418 static void __dump_run(void *unused
)
1420 struct ccw_dev_id devid
;
1421 static char buf
[100];
1423 switch (dump_method
) {
1424 case DUMP_METHOD_CCW_CIO
:
1425 devid
.devno
= dump_block_ccw
->ipl_info
.ccw
.devno
;
1427 reipl_ccw_dev(&devid
);
1429 case DUMP_METHOD_CCW_VM
:
1430 sprintf(buf
, "STORE STATUS");
1431 __cpcmd(buf
, NULL
, 0, NULL
);
1432 sprintf(buf
, "IPL %X", dump_block_ccw
->ipl_info
.ccw
.devno
);
1433 __cpcmd(buf
, NULL
, 0, NULL
);
1435 case DUMP_METHOD_CCW_DIAG
:
1436 diag308(DIAG308_SET
, dump_block_ccw
);
1437 diag308(DIAG308_DUMP
, NULL
);
1439 case DUMP_METHOD_FCP_DIAG
:
1440 diag308(DIAG308_SET
, dump_block_fcp
);
1441 diag308(DIAG308_DUMP
, NULL
);
1448 static void dump_run(struct shutdown_trigger
*trigger
)
1450 if (dump_method
== DUMP_METHOD_NONE
)
1453 smp_call_ipl_cpu(__dump_run
, NULL
);
1456 static int __init
dump_ccw_init(void)
1460 dump_block_ccw
= (void *) get_zeroed_page(GFP_KERNEL
);
1461 if (!dump_block_ccw
)
1463 rc
= sysfs_create_group(&dump_kset
->kobj
, &dump_ccw_attr_group
);
1465 free_page((unsigned long)dump_block_ccw
);
1468 dump_block_ccw
->hdr
.len
= IPL_PARM_BLK_CCW_LEN
;
1469 dump_block_ccw
->hdr
.version
= IPL_PARM_BLOCK_VERSION
;
1470 dump_block_ccw
->hdr
.blk0_len
= IPL_PARM_BLK0_CCW_LEN
;
1471 dump_block_ccw
->hdr
.pbt
= DIAG308_IPL_TYPE_CCW
;
1472 dump_capabilities
|= DUMP_TYPE_CCW
;
1476 static int __init
dump_fcp_init(void)
1480 if (!sclp_ipl_info
.has_dump
)
1481 return 0; /* LDIPL DUMP is not installed */
1482 if (!diag308_set_works
)
1484 dump_block_fcp
= (void *) get_zeroed_page(GFP_KERNEL
);
1485 if (!dump_block_fcp
)
1487 rc
= sysfs_create_group(&dump_kset
->kobj
, &dump_fcp_attr_group
);
1489 free_page((unsigned long)dump_block_fcp
);
1492 dump_block_fcp
->hdr
.len
= IPL_PARM_BLK_FCP_LEN
;
1493 dump_block_fcp
->hdr
.version
= IPL_PARM_BLOCK_VERSION
;
1494 dump_block_fcp
->hdr
.blk0_len
= IPL_PARM_BLK0_FCP_LEN
;
1495 dump_block_fcp
->hdr
.pbt
= DIAG308_IPL_TYPE_FCP
;
1496 dump_block_fcp
->ipl_info
.fcp
.opt
= DIAG308_IPL_OPT_DUMP
;
1497 dump_capabilities
|= DUMP_TYPE_FCP
;
1501 static int __init
dump_init(void)
1505 dump_kset
= kset_create_and_add("dump", NULL
, firmware_kobj
);
1508 rc
= sysfs_create_file(&dump_kset
->kobj
, &dump_type_attr
.attr
);
1510 kset_unregister(dump_kset
);
1513 rc
= dump_ccw_init();
1516 rc
= dump_fcp_init();
1519 dump_set_type(DUMP_TYPE_NONE
);
1523 static struct shutdown_action __refdata dump_action
= {
1524 .name
= SHUTDOWN_ACTION_DUMP_STR
,
1529 static void dump_reipl_run(struct shutdown_trigger
*trigger
)
1536 ipib
.csum
= csum_partial(reipl_block_actual
,
1537 reipl_block_actual
->hdr
.len
, 0);
1538 ipib
.addr
= reipl_block_actual
;
1539 memcpy_absolute(&S390_lowcore
.ipib
, &ipib
, sizeof(ipib
));
1543 static int __init
dump_reipl_init(void)
1545 if (!diag308_set_works
)
1551 static struct shutdown_action __refdata dump_reipl_action
= {
1552 .name
= SHUTDOWN_ACTION_DUMP_REIPL_STR
,
1553 .fn
= dump_reipl_run
,
1554 .init
= dump_reipl_init
,
1558 * vmcmd shutdown action: Trigger vm command on shutdown.
1561 static char vmcmd_on_reboot
[128];
1562 static char vmcmd_on_panic
[128];
1563 static char vmcmd_on_halt
[128];
1564 static char vmcmd_on_poff
[128];
1565 static char vmcmd_on_restart
[128];
1567 DEFINE_IPL_ATTR_STR_RW(vmcmd
, on_reboot
, "%s\n", "%s\n", vmcmd_on_reboot
);
1568 DEFINE_IPL_ATTR_STR_RW(vmcmd
, on_panic
, "%s\n", "%s\n", vmcmd_on_panic
);
1569 DEFINE_IPL_ATTR_STR_RW(vmcmd
, on_halt
, "%s\n", "%s\n", vmcmd_on_halt
);
1570 DEFINE_IPL_ATTR_STR_RW(vmcmd
, on_poff
, "%s\n", "%s\n", vmcmd_on_poff
);
1571 DEFINE_IPL_ATTR_STR_RW(vmcmd
, on_restart
, "%s\n", "%s\n", vmcmd_on_restart
);
1573 static struct attribute
*vmcmd_attrs
[] = {
1574 &sys_vmcmd_on_reboot_attr
.attr
,
1575 &sys_vmcmd_on_panic_attr
.attr
,
1576 &sys_vmcmd_on_halt_attr
.attr
,
1577 &sys_vmcmd_on_poff_attr
.attr
,
1578 &sys_vmcmd_on_restart_attr
.attr
,
1582 static struct attribute_group vmcmd_attr_group
= {
1583 .attrs
= vmcmd_attrs
,
1586 static struct kset
*vmcmd_kset
;
1588 static void vmcmd_run(struct shutdown_trigger
*trigger
)
1590 char *cmd
, *next_cmd
;
1592 if (strcmp(trigger
->name
, ON_REIPL_STR
) == 0)
1593 cmd
= vmcmd_on_reboot
;
1594 else if (strcmp(trigger
->name
, ON_PANIC_STR
) == 0)
1595 cmd
= vmcmd_on_panic
;
1596 else if (strcmp(trigger
->name
, ON_HALT_STR
) == 0)
1597 cmd
= vmcmd_on_halt
;
1598 else if (strcmp(trigger
->name
, ON_POFF_STR
) == 0)
1599 cmd
= vmcmd_on_poff
;
1600 else if (strcmp(trigger
->name
, ON_RESTART_STR
) == 0)
1601 cmd
= vmcmd_on_restart
;
1605 if (strlen(cmd
) == 0)
1608 next_cmd
= strchr(cmd
, '\n');
1613 __cpcmd(cmd
, NULL
, 0, NULL
);
1615 } while (cmd
!= NULL
);
1618 static int vmcmd_init(void)
1622 vmcmd_kset
= kset_create_and_add("vmcmd", NULL
, firmware_kobj
);
1625 return sysfs_create_group(&vmcmd_kset
->kobj
, &vmcmd_attr_group
);
1628 static struct shutdown_action vmcmd_action
= {SHUTDOWN_ACTION_VMCMD_STR
,
1629 vmcmd_run
, vmcmd_init
};
1632 * stop shutdown action: Stop Linux on shutdown.
1635 static void stop_run(struct shutdown_trigger
*trigger
)
1637 if (strcmp(trigger
->name
, ON_PANIC_STR
) == 0 ||
1638 strcmp(trigger
->name
, ON_RESTART_STR
) == 0)
1639 disabled_wait((unsigned long) __builtin_return_address(0));
1643 static struct shutdown_action stop_action
= {SHUTDOWN_ACTION_STOP_STR
,
1648 static struct shutdown_action
*shutdown_actions_list
[] = {
1649 &ipl_action
, &reipl_action
, &dump_reipl_action
, &dump_action
,
1650 &vmcmd_action
, &stop_action
};
1651 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1657 static struct kset
*shutdown_actions_kset
;
1659 static int set_trigger(const char *buf
, struct shutdown_trigger
*trigger
,
1664 for (i
= 0; i
< SHUTDOWN_ACTIONS_COUNT
; i
++) {
1665 if (sysfs_streq(buf
, shutdown_actions_list
[i
]->name
)) {
1666 if (shutdown_actions_list
[i
]->init_rc
) {
1667 return shutdown_actions_list
[i
]->init_rc
;
1669 trigger
->action
= shutdown_actions_list
[i
];
1679 static struct shutdown_trigger on_reboot_trigger
= {ON_REIPL_STR
,
1682 static ssize_t
on_reboot_show(struct kobject
*kobj
,
1683 struct kobj_attribute
*attr
, char *page
)
1685 return sprintf(page
, "%s\n", on_reboot_trigger
.action
->name
);
1688 static ssize_t
on_reboot_store(struct kobject
*kobj
,
1689 struct kobj_attribute
*attr
,
1690 const char *buf
, size_t len
)
1692 return set_trigger(buf
, &on_reboot_trigger
, len
);
1695 static struct kobj_attribute on_reboot_attr
=
1696 __ATTR(on_reboot
, 0644, on_reboot_show
, on_reboot_store
);
1698 static void do_machine_restart(char *__unused
)
1701 on_reboot_trigger
.action
->fn(&on_reboot_trigger
);
1704 void (*_machine_restart
)(char *command
) = do_machine_restart
;
1708 static struct shutdown_trigger on_panic_trigger
= {ON_PANIC_STR
, &stop_action
};
1710 static ssize_t
on_panic_show(struct kobject
*kobj
,
1711 struct kobj_attribute
*attr
, char *page
)
1713 return sprintf(page
, "%s\n", on_panic_trigger
.action
->name
);
1716 static ssize_t
on_panic_store(struct kobject
*kobj
,
1717 struct kobj_attribute
*attr
,
1718 const char *buf
, size_t len
)
1720 return set_trigger(buf
, &on_panic_trigger
, len
);
1723 static struct kobj_attribute on_panic_attr
=
1724 __ATTR(on_panic
, 0644, on_panic_show
, on_panic_store
);
1726 static void do_panic(void)
1729 on_panic_trigger
.action
->fn(&on_panic_trigger
);
1730 stop_run(&on_panic_trigger
);
1735 static struct shutdown_trigger on_restart_trigger
= {ON_RESTART_STR
,
1738 static ssize_t
on_restart_show(struct kobject
*kobj
,
1739 struct kobj_attribute
*attr
, char *page
)
1741 return sprintf(page
, "%s\n", on_restart_trigger
.action
->name
);
1744 static ssize_t
on_restart_store(struct kobject
*kobj
,
1745 struct kobj_attribute
*attr
,
1746 const char *buf
, size_t len
)
1748 return set_trigger(buf
, &on_restart_trigger
, len
);
1751 static struct kobj_attribute on_restart_attr
=
1752 __ATTR(on_restart
, 0644, on_restart_show
, on_restart_store
);
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
);
1790 static struct kobj_attribute on_halt_attr
=
1791 __ATTR(on_halt
, 0644, on_halt_show
, on_halt_store
);
1794 static void do_machine_halt(void)
1797 on_halt_trigger
.action
->fn(&on_halt_trigger
);
1798 stop_run(&on_halt_trigger
);
1800 void (*_machine_halt
)(void) = do_machine_halt
;
1804 static struct shutdown_trigger on_poff_trigger
= {ON_POFF_STR
, &stop_action
};
1806 static ssize_t
on_poff_show(struct kobject
*kobj
,
1807 struct kobj_attribute
*attr
, char *page
)
1809 return sprintf(page
, "%s\n", on_poff_trigger
.action
->name
);
1812 static ssize_t
on_poff_store(struct kobject
*kobj
,
1813 struct kobj_attribute
*attr
,
1814 const char *buf
, size_t len
)
1816 return set_trigger(buf
, &on_poff_trigger
, len
);
1819 static struct kobj_attribute on_poff_attr
=
1820 __ATTR(on_poff
, 0644, on_poff_show
, on_poff_store
);
1823 static void do_machine_power_off(void)
1826 on_poff_trigger
.action
->fn(&on_poff_trigger
);
1827 stop_run(&on_poff_trigger
);
1829 void (*_machine_power_off
)(void) = do_machine_power_off
;
1831 static void __init
shutdown_triggers_init(void)
1833 shutdown_actions_kset
= kset_create_and_add("shutdown_actions", NULL
,
1835 if (!shutdown_actions_kset
)
1837 if (sysfs_create_file(&shutdown_actions_kset
->kobj
,
1838 &on_reboot_attr
.attr
))
1840 if (sysfs_create_file(&shutdown_actions_kset
->kobj
,
1841 &on_panic_attr
.attr
))
1843 if (sysfs_create_file(&shutdown_actions_kset
->kobj
,
1844 &on_halt_attr
.attr
))
1846 if (sysfs_create_file(&shutdown_actions_kset
->kobj
,
1847 &on_poff_attr
.attr
))
1849 if (sysfs_create_file(&shutdown_actions_kset
->kobj
,
1850 &on_restart_attr
.attr
))
1854 panic("shutdown_triggers_init failed\n");
1857 static void __init
shutdown_actions_init(void)
1861 for (i
= 0; i
< SHUTDOWN_ACTIONS_COUNT
; i
++) {
1862 if (!shutdown_actions_list
[i
]->init
)
1864 shutdown_actions_list
[i
]->init_rc
=
1865 shutdown_actions_list
[i
]->init();
1869 static int __init
s390_ipl_init(void)
1871 sclp_get_ipl_info(&sclp_ipl_info
);
1872 shutdown_actions_init();
1873 shutdown_triggers_init();
1877 __initcall(s390_ipl_init
);
1879 static void __init
strncpy_skip_quote(char *dst
, char *src
, int n
)
1884 for (sx
= 0; src
[sx
] != 0; sx
++) {
1887 dst
[dx
++] = src
[sx
];
1893 static int __init
vmcmd_on_reboot_setup(char *str
)
1897 strncpy_skip_quote(vmcmd_on_reboot
, str
, 127);
1898 vmcmd_on_reboot
[127] = 0;
1899 on_reboot_trigger
.action
= &vmcmd_action
;
1902 __setup("vmreboot=", vmcmd_on_reboot_setup
);
1904 static int __init
vmcmd_on_panic_setup(char *str
)
1908 strncpy_skip_quote(vmcmd_on_panic
, str
, 127);
1909 vmcmd_on_panic
[127] = 0;
1910 on_panic_trigger
.action
= &vmcmd_action
;
1913 __setup("vmpanic=", vmcmd_on_panic_setup
);
1915 static int __init
vmcmd_on_halt_setup(char *str
)
1919 strncpy_skip_quote(vmcmd_on_halt
, str
, 127);
1920 vmcmd_on_halt
[127] = 0;
1921 on_halt_trigger
.action
= &vmcmd_action
;
1924 __setup("vmhalt=", vmcmd_on_halt_setup
);
1926 static int __init
vmcmd_on_poff_setup(char *str
)
1930 strncpy_skip_quote(vmcmd_on_poff
, str
, 127);
1931 vmcmd_on_poff
[127] = 0;
1932 on_poff_trigger
.action
= &vmcmd_action
;
1935 __setup("vmpoff=", vmcmd_on_poff_setup
);
1937 static int on_panic_notify(struct notifier_block
*self
,
1938 unsigned long event
, void *data
)
1944 static struct notifier_block on_panic_nb
= {
1945 .notifier_call
= on_panic_notify
,
1946 .priority
= INT_MIN
,
1949 void __init
setup_ipl(void)
1951 ipl_info
.type
= get_ipl_type();
1952 switch (ipl_info
.type
) {
1954 ipl_info
.data
.ccw
.dev_id
.devno
= ipl_devno
;
1955 ipl_info
.data
.ccw
.dev_id
.ssid
= 0;
1958 case IPL_TYPE_FCP_DUMP
:
1959 ipl_info
.data
.fcp
.dev_id
.devno
=
1960 IPL_PARMBLOCK_START
->ipl_info
.fcp
.devno
;
1961 ipl_info
.data
.fcp
.dev_id
.ssid
= 0;
1962 ipl_info
.data
.fcp
.wwpn
= IPL_PARMBLOCK_START
->ipl_info
.fcp
.wwpn
;
1963 ipl_info
.data
.fcp
.lun
= IPL_PARMBLOCK_START
->ipl_info
.fcp
.lun
;
1966 strncpy(ipl_info
.data
.nss
.name
, kernel_nss_name
,
1967 sizeof(ipl_info
.data
.nss
.name
));
1969 case IPL_TYPE_UNKNOWN
:
1970 /* We have no info to copy */
1973 atomic_notifier_chain_register(&panic_notifier_list
, &on_panic_nb
);
1976 void __init
ipl_update_parameters(void)
1980 rc
= diag308(DIAG308_STORE
, &ipl_block
);
1981 if ((rc
== DIAG308_RC_OK
) || (rc
== DIAG308_RC_NOCONFIG
))
1982 diag308_set_works
= 1;
1985 void __init
ipl_save_parameters(void)
1987 struct cio_iplinfo iplinfo
;
1990 if (cio_get_iplinfo(&iplinfo
))
1993 ipl_devno
= iplinfo
.devno
;
1994 ipl_flags
|= IPL_DEVNO_VALID
;
1995 if (!iplinfo
.is_qdio
)
1997 ipl_flags
|= IPL_PARMBLOCK_VALID
;
1998 src
= (void *)(unsigned long)S390_lowcore
.ipl_parmblock_ptr
;
1999 dst
= (void *)IPL_PARMBLOCK_ORIGIN
;
2000 memmove(dst
, src
, PAGE_SIZE
);
2001 S390_lowcore
.ipl_parmblock_ptr
= IPL_PARMBLOCK_ORIGIN
;
2004 static LIST_HEAD(rcall
);
2005 static DEFINE_MUTEX(rcall_mutex
);
2007 void register_reset_call(struct reset_call
*reset
)
2009 mutex_lock(&rcall_mutex
);
2010 list_add(&reset
->list
, &rcall
);
2011 mutex_unlock(&rcall_mutex
);
2013 EXPORT_SYMBOL_GPL(register_reset_call
);
2015 void unregister_reset_call(struct reset_call
*reset
)
2017 mutex_lock(&rcall_mutex
);
2018 list_del(&reset
->list
);
2019 mutex_unlock(&rcall_mutex
);
2021 EXPORT_SYMBOL_GPL(unregister_reset_call
);
2023 static void do_reset_calls(void)
2025 struct reset_call
*reset
;
2028 if (diag308_set_works
) {
2033 list_for_each_entry(reset
, &rcall
, list
)
2037 u32 dump_prefix_page
;
2039 void s390_reset_system(void (*func
)(void *), void *data
)
2041 struct _lowcore
*lc
;
2043 lc
= (struct _lowcore
*)(unsigned long) store_prefix();
2045 /* Stack for interrupt/machine check handler */
2046 lc
->panic_stack
= S390_lowcore
.panic_stack
;
2048 /* Save prefix page address for dump case */
2049 dump_prefix_page
= (u32
)(unsigned long) lc
;
2051 /* Disable prefixing */
2054 /* Disable lowcore protection */
2055 __ctl_clear_bit(0,28);
2057 /* Set new machine check handler */
2058 S390_lowcore
.mcck_new_psw
.mask
= psw_kernel_bits
| PSW_MASK_DAT
;
2059 S390_lowcore
.mcck_new_psw
.addr
=
2060 PSW_ADDR_AMODE
| (unsigned long) s390_base_mcck_handler
;
2062 /* Set new program check handler */
2063 S390_lowcore
.program_new_psw
.mask
= psw_kernel_bits
| PSW_MASK_DAT
;
2064 S390_lowcore
.program_new_psw
.addr
=
2065 PSW_ADDR_AMODE
| (unsigned long) s390_base_pgm_handler
;
2067 /* Store status at absolute zero */