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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>
17#include <linux/fs.h>
18#include <linux/gfp.h>
19#include <linux/crash_dump.h>
20#include <asm/ipl.h>
21#include <asm/smp.h>
22#include <asm/setup.h>
23#include <asm/cpcmd.h>
24#include <asm/cio.h>
25#include <asm/ebcdic.h>
26#include <asm/reset.h>
27#include <asm/sclp.h>
28#include <asm/sigp.h>
29#include <asm/checksum.h>
30#include "entry.h"
31
32#define IPL_PARM_BLOCK_VERSION 0
33
34#define IPL_UNKNOWN_STR "unknown"
35#define IPL_CCW_STR "ccw"
36#define IPL_FCP_STR "fcp"
37#define IPL_FCP_DUMP_STR "fcp_dump"
38#define IPL_NSS_STR "nss"
39
40#define DUMP_CCW_STR "ccw"
41#define DUMP_FCP_STR "fcp"
42#define DUMP_NONE_STR "none"
43
44
45
46
47
48
49
50
51
52#define ON_PANIC_STR "on_panic"
53#define ON_HALT_STR "on_halt"
54#define ON_POFF_STR "on_poff"
55#define ON_REIPL_STR "on_reboot"
56#define ON_RESTART_STR "on_restart"
57
58struct shutdown_action;
59struct shutdown_trigger {
60 char *name;
61 struct shutdown_action *action;
62};
63
64
65
66
67#define SHUTDOWN_ACTION_IPL_STR "ipl"
68#define SHUTDOWN_ACTION_REIPL_STR "reipl"
69#define SHUTDOWN_ACTION_DUMP_STR "dump"
70#define SHUTDOWN_ACTION_VMCMD_STR "vmcmd"
71#define SHUTDOWN_ACTION_STOP_STR "stop"
72#define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl"
73
74struct shutdown_action {
75 char *name;
76 void (*fn) (struct shutdown_trigger *trigger);
77 int (*init) (void);
78 int init_rc;
79};
80
81static char *ipl_type_str(enum ipl_type type)
82{
83 switch (type) {
84 case IPL_TYPE_CCW:
85 return IPL_CCW_STR;
86 case IPL_TYPE_FCP:
87 return IPL_FCP_STR;
88 case IPL_TYPE_FCP_DUMP:
89 return IPL_FCP_DUMP_STR;
90 case IPL_TYPE_NSS:
91 return IPL_NSS_STR;
92 case IPL_TYPE_UNKNOWN:
93 default:
94 return IPL_UNKNOWN_STR;
95 }
96}
97
98enum dump_type {
99 DUMP_TYPE_NONE = 1,
100 DUMP_TYPE_CCW = 2,
101 DUMP_TYPE_FCP = 4,
102};
103
104static char *dump_type_str(enum dump_type type)
105{
106 switch (type) {
107 case DUMP_TYPE_NONE:
108 return DUMP_NONE_STR;
109 case DUMP_TYPE_CCW:
110 return DUMP_CCW_STR;
111 case DUMP_TYPE_FCP:
112 return DUMP_FCP_STR;
113 default:
114 return NULL;
115 }
116}
117
118
119
120
121
122static u16 ipl_devno __attribute__((__section__(".data"))) = 0;
123u32 ipl_flags __attribute__((__section__(".data"))) = 0;
124
125enum ipl_method {
126 REIPL_METHOD_CCW_CIO,
127 REIPL_METHOD_CCW_DIAG,
128 REIPL_METHOD_CCW_VM,
129 REIPL_METHOD_FCP_RO_DIAG,
130 REIPL_METHOD_FCP_RW_DIAG,
131 REIPL_METHOD_FCP_RO_VM,
132 REIPL_METHOD_FCP_DUMP,
133 REIPL_METHOD_NSS,
134 REIPL_METHOD_NSS_DIAG,
135 REIPL_METHOD_DEFAULT,
136};
137
138enum dump_method {
139 DUMP_METHOD_NONE,
140 DUMP_METHOD_CCW_CIO,
141 DUMP_METHOD_CCW_DIAG,
142 DUMP_METHOD_CCW_VM,
143 DUMP_METHOD_FCP_DIAG,
144};
145
146static int diag308_set_works = 0;
147
148static struct ipl_parameter_block ipl_block;
149
150static int reipl_capabilities = IPL_TYPE_UNKNOWN;
151
152static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
153static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
154static struct ipl_parameter_block *reipl_block_fcp;
155static struct ipl_parameter_block *reipl_block_ccw;
156static struct ipl_parameter_block *reipl_block_nss;
157static struct ipl_parameter_block *reipl_block_actual;
158
159static int dump_capabilities = DUMP_TYPE_NONE;
160static enum dump_type dump_type = DUMP_TYPE_NONE;
161static enum dump_method dump_method = DUMP_METHOD_NONE;
162static struct ipl_parameter_block *dump_block_fcp;
163static struct ipl_parameter_block *dump_block_ccw;
164
165static struct sclp_ipl_info sclp_ipl_info;
166
167int diag308(unsigned long subcode, void *addr)
168{
169 register unsigned long _addr asm("0") = (unsigned long) addr;
170 register unsigned long _rc asm("1") = 0;
171
172 asm volatile(
173 " diag %0,%2,0x308\n"
174 "0:\n"
175 EX_TABLE(0b,0b)
176 : "+d" (_addr), "+d" (_rc)
177 : "d" (subcode) : "cc", "memory");
178 return _rc;
179}
180EXPORT_SYMBOL_GPL(diag308);
181
182
183
184#define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
185static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
186 struct kobj_attribute *attr, \
187 char *page) \
188{ \
189 return sprintf(page, _format, _value); \
190} \
191static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
192 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL);
193
194#define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
195static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
196 struct kobj_attribute *attr, \
197 char *page) \
198{ \
199 return sprintf(page, _fmt_out, \
200 (unsigned long long) _value); \
201} \
202static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
203 struct kobj_attribute *attr, \
204 const char *buf, size_t len) \
205{ \
206 unsigned long long value; \
207 if (sscanf(buf, _fmt_in, &value) != 1) \
208 return -EINVAL; \
209 _value = value; \
210 return len; \
211} \
212static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
213 __ATTR(_name,(S_IRUGO | S_IWUSR), \
214 sys_##_prefix##_##_name##_show, \
215 sys_##_prefix##_##_name##_store);
216
217#define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
218static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
219 struct kobj_attribute *attr, \
220 char *page) \
221{ \
222 return sprintf(page, _fmt_out, _value); \
223} \
224static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
225 struct kobj_attribute *attr, \
226 const char *buf, size_t len) \
227{ \
228 strncpy(_value, buf, sizeof(_value) - 1); \
229 strim(_value); \
230 return len; \
231} \
232static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
233 __ATTR(_name,(S_IRUGO | S_IWUSR), \
234 sys_##_prefix##_##_name##_show, \
235 sys_##_prefix##_##_name##_store);
236
237static void make_attrs_ro(struct attribute **attrs)
238{
239 while (*attrs) {
240 (*attrs)->mode = S_IRUGO;
241 attrs++;
242 }
243}
244
245
246
247
248
249static __init enum ipl_type get_ipl_type(void)
250{
251 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
252
253 if (ipl_flags & IPL_NSS_VALID)
254 return IPL_TYPE_NSS;
255 if (!(ipl_flags & IPL_DEVNO_VALID))
256 return IPL_TYPE_UNKNOWN;
257 if (!(ipl_flags & IPL_PARMBLOCK_VALID))
258 return IPL_TYPE_CCW;
259 if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
260 return IPL_TYPE_UNKNOWN;
261 if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
262 return IPL_TYPE_UNKNOWN;
263 if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
264 return IPL_TYPE_FCP_DUMP;
265 return IPL_TYPE_FCP;
266}
267
268struct ipl_info ipl_info;
269EXPORT_SYMBOL_GPL(ipl_info);
270
271static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
272 char *page)
273{
274 return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
275}
276
277static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
278
279
280static size_t reipl_get_ascii_vmparm(char *dest, size_t size,
281 const struct ipl_parameter_block *ipb)
282{
283 int i;
284 size_t len;
285 char has_lowercase = 0;
286
287 len = 0;
288 if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
289 (ipb->ipl_info.ccw.vm_parm_len > 0)) {
290
291 len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
292 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
293
294
295
296 for (i = 0; i < len; i++)
297 if ((dest[i] > 0x80 && dest[i] < 0x8a) ||
298 (dest[i] > 0x90 && dest[i] < 0x9a) ||
299 (dest[i] > 0xa1 && dest[i] < 0xaa)) {
300 has_lowercase = 1;
301 break;
302 }
303 if (!has_lowercase)
304 EBC_TOLOWER(dest, len);
305 EBCASC(dest, len);
306 }
307 dest[len] = 0;
308
309 return len;
310}
311
312size_t append_ipl_vmparm(char *dest, size_t size)
313{
314 size_t rc;
315
316 rc = 0;
317 if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
318 rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
319 else
320 dest[0] = 0;
321 return rc;
322}
323
324static ssize_t ipl_vm_parm_show(struct kobject *kobj,
325 struct kobj_attribute *attr, char *page)
326{
327 char parm[DIAG308_VMPARM_SIZE + 1] = {};
328
329 append_ipl_vmparm(parm, sizeof(parm));
330 return sprintf(page, "%s\n", parm);
331}
332
333static size_t scpdata_length(const char* buf, size_t count)
334{
335 while (count) {
336 if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
337 break;
338 count--;
339 }
340 return count;
341}
342
343static size_t reipl_append_ascii_scpdata(char *dest, size_t size,
344 const struct ipl_parameter_block *ipb)
345{
346 size_t count;
347 size_t i;
348 int has_lowercase;
349
350 count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data,
351 ipb->ipl_info.fcp.scp_data_len));
352 if (!count)
353 goto out;
354
355 has_lowercase = 0;
356 for (i = 0; i < count; i++) {
357 if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
358 count = 0;
359 goto out;
360 }
361 if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
362 has_lowercase = 1;
363 }
364
365 if (has_lowercase)
366 memcpy(dest, ipb->ipl_info.fcp.scp_data, count);
367 else
368 for (i = 0; i < count; i++)
369 dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]);
370out:
371 dest[count] = '\0';
372 return count;
373}
374
375size_t append_ipl_scpdata(char *dest, size_t len)
376{
377 size_t rc;
378
379 rc = 0;
380 if (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP)
381 rc = reipl_append_ascii_scpdata(dest, len, &ipl_block);
382 else
383 dest[0] = 0;
384 return rc;
385}
386
387
388static struct kobj_attribute sys_ipl_vm_parm_attr =
389 __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
390
391static ssize_t sys_ipl_device_show(struct kobject *kobj,
392 struct kobj_attribute *attr, char *page)
393{
394 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
395
396 switch (ipl_info.type) {
397 case IPL_TYPE_CCW:
398 return sprintf(page, "0.0.%04x\n", ipl_devno);
399 case IPL_TYPE_FCP:
400 case IPL_TYPE_FCP_DUMP:
401 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
402 default:
403 return 0;
404 }
405}
406
407static struct kobj_attribute sys_ipl_device_attr =
408 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
409
410static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
411 struct bin_attribute *attr, char *buf,
412 loff_t off, size_t count)
413{
414 return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START,
415 IPL_PARMBLOCK_SIZE);
416}
417
418static struct bin_attribute ipl_parameter_attr = {
419 .attr = {
420 .name = "binary_parameter",
421 .mode = S_IRUGO,
422 },
423 .size = PAGE_SIZE,
424 .read = &ipl_parameter_read,
425};
426
427static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
428 struct bin_attribute *attr, char *buf,
429 loff_t off, size_t count)
430{
431 unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
432 void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
433
434 return memory_read_from_buffer(buf, count, &off, scp_data, size);
435}
436
437static struct bin_attribute ipl_scp_data_attr = {
438 .attr = {
439 .name = "scp_data",
440 .mode = S_IRUGO,
441 },
442 .size = PAGE_SIZE,
443 .read = ipl_scp_data_read,
444};
445
446
447
448DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
449 IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
450DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
451 IPL_PARMBLOCK_START->ipl_info.fcp.lun);
452DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
453 IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
454DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
455 IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
456
457static struct attribute *ipl_fcp_attrs[] = {
458 &sys_ipl_type_attr.attr,
459 &sys_ipl_device_attr.attr,
460 &sys_ipl_fcp_wwpn_attr.attr,
461 &sys_ipl_fcp_lun_attr.attr,
462 &sys_ipl_fcp_bootprog_attr.attr,
463 &sys_ipl_fcp_br_lba_attr.attr,
464 NULL,
465};
466
467static struct attribute_group ipl_fcp_attr_group = {
468 .attrs = ipl_fcp_attrs,
469};
470
471
472
473static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
474 struct kobj_attribute *attr, char *page)
475{
476 char loadparm[LOADPARM_LEN + 1] = {};
477
478 if (!sclp_ipl_info.is_valid)
479 return sprintf(page, "#unknown#\n");
480 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
481 EBCASC(loadparm, LOADPARM_LEN);
482 strim(loadparm);
483 return sprintf(page, "%s\n", loadparm);
484}
485
486static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
487 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
488
489static struct attribute *ipl_ccw_attrs_vm[] = {
490 &sys_ipl_type_attr.attr,
491 &sys_ipl_device_attr.attr,
492 &sys_ipl_ccw_loadparm_attr.attr,
493 &sys_ipl_vm_parm_attr.attr,
494 NULL,
495};
496
497static struct attribute *ipl_ccw_attrs_lpar[] = {
498 &sys_ipl_type_attr.attr,
499 &sys_ipl_device_attr.attr,
500 &sys_ipl_ccw_loadparm_attr.attr,
501 NULL,
502};
503
504static struct attribute_group ipl_ccw_attr_group_vm = {
505 .attrs = ipl_ccw_attrs_vm,
506};
507
508static struct attribute_group ipl_ccw_attr_group_lpar = {
509 .attrs = ipl_ccw_attrs_lpar
510};
511
512
513
514DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
515
516static struct attribute *ipl_nss_attrs[] = {
517 &sys_ipl_type_attr.attr,
518 &sys_ipl_nss_name_attr.attr,
519 &sys_ipl_ccw_loadparm_attr.attr,
520 &sys_ipl_vm_parm_attr.attr,
521 NULL,
522};
523
524static struct attribute_group ipl_nss_attr_group = {
525 .attrs = ipl_nss_attrs,
526};
527
528
529
530static struct attribute *ipl_unknown_attrs[] = {
531 &sys_ipl_type_attr.attr,
532 NULL,
533};
534
535static struct attribute_group ipl_unknown_attr_group = {
536 .attrs = ipl_unknown_attrs,
537};
538
539static struct kset *ipl_kset;
540
541static int __init ipl_register_fcp_files(void)
542{
543 int rc;
544
545 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
546 if (rc)
547 goto out;
548 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
549 if (rc)
550 goto out_ipl_parm;
551 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_scp_data_attr);
552 if (!rc)
553 goto out;
554
555 sysfs_remove_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
556
557out_ipl_parm:
558 sysfs_remove_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
559out:
560 return rc;
561}
562
563static void __ipl_run(void *unused)
564{
565 diag308(DIAG308_IPL, NULL);
566 if (MACHINE_IS_VM)
567 __cpcmd("IPL", NULL, 0, NULL);
568 else if (ipl_info.type == IPL_TYPE_CCW)
569 reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
570}
571
572static void ipl_run(struct shutdown_trigger *trigger)
573{
574 smp_switch_to_ipl_cpu(__ipl_run, NULL);
575}
576
577static int __init ipl_init(void)
578{
579 int rc;
580
581 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
582 if (!ipl_kset) {
583 rc = -ENOMEM;
584 goto out;
585 }
586 switch (ipl_info.type) {
587 case IPL_TYPE_CCW:
588 if (MACHINE_IS_VM)
589 rc = sysfs_create_group(&ipl_kset->kobj,
590 &ipl_ccw_attr_group_vm);
591 else
592 rc = sysfs_create_group(&ipl_kset->kobj,
593 &ipl_ccw_attr_group_lpar);
594 break;
595 case IPL_TYPE_FCP:
596 case IPL_TYPE_FCP_DUMP:
597 rc = ipl_register_fcp_files();
598 break;
599 case IPL_TYPE_NSS:
600 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group);
601 break;
602 default:
603 rc = sysfs_create_group(&ipl_kset->kobj,
604 &ipl_unknown_attr_group);
605 break;
606 }
607out:
608 if (rc)
609 panic("ipl_init failed: rc = %i\n", rc);
610
611 return 0;
612}
613
614static struct shutdown_action __refdata ipl_action = {
615 .name = SHUTDOWN_ACTION_IPL_STR,
616 .fn = ipl_run,
617 .init = ipl_init,
618};
619
620
621
622
623
624
625static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
626 char *page)
627{
628 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
629
630 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
631 return sprintf(page, "%s\n", vmparm);
632}
633
634static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
635 size_t vmparm_max,
636 const char *buf, size_t len)
637{
638 int i, ip_len;
639
640
641 ip_len = len;
642 if ((len > 0) && (buf[len - 1] == '\n'))
643 ip_len--;
644
645 if (ip_len > vmparm_max)
646 return -EINVAL;
647
648
649 for (i = 0; i < ip_len; i++)
650 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
651 return -EINVAL;
652
653 memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
654 ipb->ipl_info.ccw.vm_parm_len = ip_len;
655 if (ip_len > 0) {
656 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
657 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
658 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
659 } else {
660 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
661 }
662
663 return len;
664}
665
666
667static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
668 struct kobj_attribute *attr, char *page)
669{
670 return reipl_generic_vmparm_show(reipl_block_nss, page);
671}
672
673static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
674 struct kobj_attribute *attr,
675 const char *buf, size_t len)
676{
677 return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
678}
679
680
681static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
682 struct kobj_attribute *attr, char *page)
683{
684 return reipl_generic_vmparm_show(reipl_block_ccw, page);
685}
686
687static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
688 struct kobj_attribute *attr,
689 const char *buf, size_t len)
690{
691 return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
692}
693
694static struct kobj_attribute sys_reipl_nss_vmparm_attr =
695 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
696 reipl_nss_vmparm_store);
697static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
698 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
699 reipl_ccw_vmparm_store);
700
701
702
703static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
704 struct bin_attribute *attr,
705 char *buf, loff_t off, size_t count)
706{
707 size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
708 void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
709
710 return memory_read_from_buffer(buf, count, &off, scp_data, size);
711}
712
713static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
714 struct bin_attribute *attr,
715 char *buf, loff_t off, size_t count)
716{
717 size_t padding;
718 size_t scpdata_len;
719
720 if (off < 0)
721 return -EINVAL;
722
723 if (off >= DIAG308_SCPDATA_SIZE)
724 return -ENOSPC;
725
726 if (count > DIAG308_SCPDATA_SIZE - off)
727 count = DIAG308_SCPDATA_SIZE - off;
728
729 memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf + off, count);
730 scpdata_len = off + count;
731
732 if (scpdata_len % 8) {
733 padding = 8 - (scpdata_len % 8);
734 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
735 0, padding);
736 scpdata_len += padding;
737 }
738
739 reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
740 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
741 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
742
743 return count;
744}
745
746static struct bin_attribute sys_reipl_fcp_scp_data_attr = {
747 .attr = {
748 .name = "scp_data",
749 .mode = S_IRUGO | S_IWUSR,
750 },
751 .size = PAGE_SIZE,
752 .read = reipl_fcp_scpdata_read,
753 .write = reipl_fcp_scpdata_write,
754};
755
756DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n",
757 reipl_block_fcp->ipl_info.fcp.wwpn);
758DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n",
759 reipl_block_fcp->ipl_info.fcp.lun);
760DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
761 reipl_block_fcp->ipl_info.fcp.bootprog);
762DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
763 reipl_block_fcp->ipl_info.fcp.br_lba);
764DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
765 reipl_block_fcp->ipl_info.fcp.devno);
766
767static struct attribute *reipl_fcp_attrs[] = {
768 &sys_reipl_fcp_device_attr.attr,
769 &sys_reipl_fcp_wwpn_attr.attr,
770 &sys_reipl_fcp_lun_attr.attr,
771 &sys_reipl_fcp_bootprog_attr.attr,
772 &sys_reipl_fcp_br_lba_attr.attr,
773 NULL,
774};
775
776static struct attribute_group reipl_fcp_attr_group = {
777 .attrs = reipl_fcp_attrs,
778};
779
780
781
782DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
783 reipl_block_ccw->ipl_info.ccw.devno);
784
785static void reipl_get_ascii_loadparm(char *loadparm,
786 struct ipl_parameter_block *ibp)
787{
788 memcpy(loadparm, ibp->ipl_info.ccw.load_parm, LOADPARM_LEN);
789 EBCASC(loadparm, LOADPARM_LEN);
790 loadparm[LOADPARM_LEN] = 0;
791 strim(loadparm);
792}
793
794static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
795 char *page)
796{
797 char buf[LOADPARM_LEN + 1];
798
799 reipl_get_ascii_loadparm(buf, ipb);
800 return sprintf(page, "%s\n", buf);
801}
802
803static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
804 const char *buf, size_t len)
805{
806 int i, lp_len;
807
808
809 lp_len = len;
810 if ((len > 0) && (buf[len - 1] == '\n'))
811 lp_len--;
812
813 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
814 return -EINVAL;
815
816 for (i = 0; i < lp_len; i++) {
817 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
818 (buf[i] == '.'))
819 continue;
820 return -EINVAL;
821 }
822
823 memset(ipb->ipl_info.ccw.load_parm, ' ', LOADPARM_LEN);
824
825 memcpy(ipb->ipl_info.ccw.load_parm, buf, lp_len);
826 ASCEBC(ipb->ipl_info.ccw.load_parm, LOADPARM_LEN);
827 return len;
828}
829
830
831static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
832 struct kobj_attribute *attr, char *page)
833{
834 return reipl_generic_loadparm_show(reipl_block_nss, page);
835}
836
837static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
838 struct kobj_attribute *attr,
839 const char *buf, size_t len)
840{
841 return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
842}
843
844
845static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
846 struct kobj_attribute *attr, char *page)
847{
848 return reipl_generic_loadparm_show(reipl_block_ccw, page);
849}
850
851static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
852 struct kobj_attribute *attr,
853 const char *buf, size_t len)
854{
855 return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
856}
857
858static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
859 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
860 reipl_ccw_loadparm_store);
861
862static struct attribute *reipl_ccw_attrs_vm[] = {
863 &sys_reipl_ccw_device_attr.attr,
864 &sys_reipl_ccw_loadparm_attr.attr,
865 &sys_reipl_ccw_vmparm_attr.attr,
866 NULL,
867};
868
869static struct attribute *reipl_ccw_attrs_lpar[] = {
870 &sys_reipl_ccw_device_attr.attr,
871 &sys_reipl_ccw_loadparm_attr.attr,
872 NULL,
873};
874
875static struct attribute_group reipl_ccw_attr_group_vm = {
876 .name = IPL_CCW_STR,
877 .attrs = reipl_ccw_attrs_vm,
878};
879
880static struct attribute_group reipl_ccw_attr_group_lpar = {
881 .name = IPL_CCW_STR,
882 .attrs = reipl_ccw_attrs_lpar,
883};
884
885
886
887static void reipl_get_ascii_nss_name(char *dst,
888 struct ipl_parameter_block *ipb)
889{
890 memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
891 EBCASC(dst, NSS_NAME_SIZE);
892 dst[NSS_NAME_SIZE] = 0;
893}
894
895static ssize_t reipl_nss_name_show(struct kobject *kobj,
896 struct kobj_attribute *attr, char *page)
897{
898 char nss_name[NSS_NAME_SIZE + 1] = {};
899
900 reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
901 return sprintf(page, "%s\n", nss_name);
902}
903
904static ssize_t reipl_nss_name_store(struct kobject *kobj,
905 struct kobj_attribute *attr,
906 const char *buf, size_t len)
907{
908 int nss_len;
909
910
911 nss_len = len;
912 if ((len > 0) && (buf[len - 1] == '\n'))
913 nss_len--;
914
915 if (nss_len > NSS_NAME_SIZE)
916 return -EINVAL;
917
918 memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
919 if (nss_len > 0) {
920 reipl_block_nss->ipl_info.ccw.vm_flags |=
921 DIAG308_VM_FLAGS_NSS_VALID;
922 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
923 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
924 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
925 } else {
926 reipl_block_nss->ipl_info.ccw.vm_flags &=
927 ~DIAG308_VM_FLAGS_NSS_VALID;
928 }
929
930 return len;
931}
932
933static struct kobj_attribute sys_reipl_nss_name_attr =
934 __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
935 reipl_nss_name_store);
936
937static struct kobj_attribute sys_reipl_nss_loadparm_attr =
938 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
939 reipl_nss_loadparm_store);
940
941static struct attribute *reipl_nss_attrs[] = {
942 &sys_reipl_nss_name_attr.attr,
943 &sys_reipl_nss_loadparm_attr.attr,
944 &sys_reipl_nss_vmparm_attr.attr,
945 NULL,
946};
947
948static struct attribute_group reipl_nss_attr_group = {
949 .name = IPL_NSS_STR,
950 .attrs = reipl_nss_attrs,
951};
952
953
954
955static int reipl_set_type(enum ipl_type type)
956{
957 if (!(reipl_capabilities & type))
958 return -EINVAL;
959
960 switch(type) {
961 case IPL_TYPE_CCW:
962 if (diag308_set_works)
963 reipl_method = REIPL_METHOD_CCW_DIAG;
964 else if (MACHINE_IS_VM)
965 reipl_method = REIPL_METHOD_CCW_VM;
966 else
967 reipl_method = REIPL_METHOD_CCW_CIO;
968 reipl_block_actual = reipl_block_ccw;
969 break;
970 case IPL_TYPE_FCP:
971 if (diag308_set_works)
972 reipl_method = REIPL_METHOD_FCP_RW_DIAG;
973 else if (MACHINE_IS_VM)
974 reipl_method = REIPL_METHOD_FCP_RO_VM;
975 else
976 reipl_method = REIPL_METHOD_FCP_RO_DIAG;
977 reipl_block_actual = reipl_block_fcp;
978 break;
979 case IPL_TYPE_FCP_DUMP:
980 reipl_method = REIPL_METHOD_FCP_DUMP;
981 break;
982 case IPL_TYPE_NSS:
983 if (diag308_set_works)
984 reipl_method = REIPL_METHOD_NSS_DIAG;
985 else
986 reipl_method = REIPL_METHOD_NSS;
987 reipl_block_actual = reipl_block_nss;
988 break;
989 case IPL_TYPE_UNKNOWN:
990 reipl_method = REIPL_METHOD_DEFAULT;
991 break;
992 default:
993 BUG();
994 }
995 reipl_type = type;
996 return 0;
997}
998
999static ssize_t reipl_type_show(struct kobject *kobj,
1000 struct kobj_attribute *attr, char *page)
1001{
1002 return sprintf(page, "%s\n", ipl_type_str(reipl_type));
1003}
1004
1005static ssize_t reipl_type_store(struct kobject *kobj,
1006 struct kobj_attribute *attr,
1007 const char *buf, size_t len)
1008{
1009 int rc = -EINVAL;
1010
1011 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1012 rc = reipl_set_type(IPL_TYPE_CCW);
1013 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1014 rc = reipl_set_type(IPL_TYPE_FCP);
1015 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1016 rc = reipl_set_type(IPL_TYPE_NSS);
1017 return (rc != 0) ? rc : len;
1018}
1019
1020static struct kobj_attribute reipl_type_attr =
1021 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
1022
1023static struct kset *reipl_kset;
1024static struct kset *reipl_fcp_kset;
1025
1026static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
1027 const enum ipl_method m)
1028{
1029 char loadparm[LOADPARM_LEN + 1] = {};
1030 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
1031 char nss_name[NSS_NAME_SIZE + 1] = {};
1032 size_t pos = 0;
1033
1034 reipl_get_ascii_loadparm(loadparm, ipb);
1035 reipl_get_ascii_nss_name(nss_name, ipb);
1036 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
1037
1038 switch (m) {
1039 case REIPL_METHOD_CCW_VM:
1040 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
1041 break;
1042 case REIPL_METHOD_NSS:
1043 pos = sprintf(dst, "IPL %s", nss_name);
1044 break;
1045 default:
1046 break;
1047 }
1048 if (strlen(loadparm) > 0)
1049 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
1050 if (strlen(vmparm) > 0)
1051 sprintf(dst + pos, " PARM %s", vmparm);
1052}
1053
1054static void __reipl_run(void *unused)
1055{
1056 struct ccw_dev_id devid;
1057 static char buf[128];
1058
1059 switch (reipl_method) {
1060 case REIPL_METHOD_CCW_CIO:
1061 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
1062 devid.ssid = 0;
1063 reipl_ccw_dev(&devid);
1064 break;
1065 case REIPL_METHOD_CCW_VM:
1066 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
1067 __cpcmd(buf, NULL, 0, NULL);
1068 break;
1069 case REIPL_METHOD_CCW_DIAG:
1070 diag308(DIAG308_SET, reipl_block_ccw);
1071 diag308(DIAG308_IPL, NULL);
1072 break;
1073 case REIPL_METHOD_FCP_RW_DIAG:
1074 diag308(DIAG308_SET, reipl_block_fcp);
1075 diag308(DIAG308_IPL, NULL);
1076 break;
1077 case REIPL_METHOD_FCP_RO_DIAG:
1078 diag308(DIAG308_IPL, NULL);
1079 break;
1080 case REIPL_METHOD_FCP_RO_VM:
1081 __cpcmd("IPL", NULL, 0, NULL);
1082 break;
1083 case REIPL_METHOD_NSS_DIAG:
1084 diag308(DIAG308_SET, reipl_block_nss);
1085 diag308(DIAG308_IPL, NULL);
1086 break;
1087 case REIPL_METHOD_NSS:
1088 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
1089 __cpcmd(buf, NULL, 0, NULL);
1090 break;
1091 case REIPL_METHOD_DEFAULT:
1092 if (MACHINE_IS_VM)
1093 __cpcmd("IPL", NULL, 0, NULL);
1094 diag308(DIAG308_IPL, NULL);
1095 break;
1096 case REIPL_METHOD_FCP_DUMP:
1097 break;
1098 }
1099 disabled_wait((unsigned long) __builtin_return_address(0));
1100}
1101
1102static void reipl_run(struct shutdown_trigger *trigger)
1103{
1104 smp_switch_to_ipl_cpu(__reipl_run, NULL);
1105}
1106
1107static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
1108{
1109 ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
1110 ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1111 ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1112 ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1113}
1114
1115static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1116{
1117
1118
1119 if (sclp_ipl_info.is_valid)
1120 memcpy(ipb->ipl_info.ccw.load_parm,
1121 &sclp_ipl_info.loadparm, LOADPARM_LEN);
1122 else
1123
1124 memset(ipb->ipl_info.ccw.load_parm, 0x40, LOADPARM_LEN);
1125 ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
1126
1127
1128 if (MACHINE_IS_VM && diag308_set_works &&
1129 (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1130
1131 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1132 ipb->ipl_info.ccw.vm_parm_len =
1133 ipl_block.ipl_info.ccw.vm_parm_len;
1134 memcpy(ipb->ipl_info.ccw.vm_parm,
1135 ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1136 }
1137}
1138
1139static int __init reipl_nss_init(void)
1140{
1141 int rc;
1142
1143 if (!MACHINE_IS_VM)
1144 return 0;
1145
1146 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1147 if (!reipl_block_nss)
1148 return -ENOMEM;
1149
1150 if (!diag308_set_works)
1151 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO;
1152
1153 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1154 if (rc)
1155 return rc;
1156
1157 reipl_block_ccw_init(reipl_block_nss);
1158 if (ipl_info.type == IPL_TYPE_NSS) {
1159 memset(reipl_block_nss->ipl_info.ccw.nss_name,
1160 ' ', NSS_NAME_SIZE);
1161 memcpy(reipl_block_nss->ipl_info.ccw.nss_name,
1162 kernel_nss_name, strlen(kernel_nss_name));
1163 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
1164 reipl_block_nss->ipl_info.ccw.vm_flags |=
1165 DIAG308_VM_FLAGS_NSS_VALID;
1166
1167 reipl_block_ccw_fill_parms(reipl_block_nss);
1168 }
1169
1170 reipl_capabilities |= IPL_TYPE_NSS;
1171 return 0;
1172}
1173
1174static int __init reipl_ccw_init(void)
1175{
1176 int rc;
1177
1178 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1179 if (!reipl_block_ccw)
1180 return -ENOMEM;
1181
1182 if (MACHINE_IS_VM) {
1183 if (!diag308_set_works)
1184 sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
1185 rc = sysfs_create_group(&reipl_kset->kobj,
1186 &reipl_ccw_attr_group_vm);
1187 } else {
1188 if(!diag308_set_works)
1189 sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
1190 rc = sysfs_create_group(&reipl_kset->kobj,
1191 &reipl_ccw_attr_group_lpar);
1192 }
1193 if (rc)
1194 return rc;
1195
1196 reipl_block_ccw_init(reipl_block_ccw);
1197 if (ipl_info.type == IPL_TYPE_CCW) {
1198 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
1199 reipl_block_ccw_fill_parms(reipl_block_ccw);
1200 }
1201
1202 reipl_capabilities |= IPL_TYPE_CCW;
1203 return 0;
1204}
1205
1206static int __init reipl_fcp_init(void)
1207{
1208 int rc;
1209
1210 if (!diag308_set_works) {
1211 if (ipl_info.type == IPL_TYPE_FCP) {
1212 make_attrs_ro(reipl_fcp_attrs);
1213 sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO;
1214 } else
1215 return 0;
1216 }
1217
1218 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1219 if (!reipl_block_fcp)
1220 return -ENOMEM;
1221
1222
1223 reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1224 &reipl_kset->kobj);
1225 if (!reipl_fcp_kset) {
1226 free_page((unsigned long) reipl_block_fcp);
1227 return -ENOMEM;
1228 }
1229
1230 rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1231 if (rc) {
1232 kset_unregister(reipl_fcp_kset);
1233 free_page((unsigned long) reipl_block_fcp);
1234 return rc;
1235 }
1236
1237 rc = sysfs_create_bin_file(&reipl_fcp_kset->kobj,
1238 &sys_reipl_fcp_scp_data_attr);
1239 if (rc) {
1240 sysfs_remove_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1241 kset_unregister(reipl_fcp_kset);
1242 free_page((unsigned long) reipl_block_fcp);
1243 return rc;
1244 }
1245
1246 if (ipl_info.type == IPL_TYPE_FCP)
1247 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
1248 else {
1249 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1250 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1251 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1252 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1253 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1254 }
1255 reipl_capabilities |= IPL_TYPE_FCP;
1256 return 0;
1257}
1258
1259static int __init reipl_init(void)
1260{
1261 int rc;
1262
1263 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1264 if (!reipl_kset)
1265 return -ENOMEM;
1266 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1267 if (rc) {
1268 kset_unregister(reipl_kset);
1269 return rc;
1270 }
1271 rc = reipl_ccw_init();
1272 if (rc)
1273 return rc;
1274 rc = reipl_fcp_init();
1275 if (rc)
1276 return rc;
1277 rc = reipl_nss_init();
1278 if (rc)
1279 return rc;
1280 rc = reipl_set_type(ipl_info.type);
1281 if (rc)
1282 return rc;
1283 return 0;
1284}
1285
1286static struct shutdown_action __refdata reipl_action = {
1287 .name = SHUTDOWN_ACTION_REIPL_STR,
1288 .fn = reipl_run,
1289 .init = reipl_init,
1290};
1291
1292
1293
1294
1295
1296
1297
1298DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n",
1299 dump_block_fcp->ipl_info.fcp.wwpn);
1300DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n",
1301 dump_block_fcp->ipl_info.fcp.lun);
1302DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1303 dump_block_fcp->ipl_info.fcp.bootprog);
1304DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1305 dump_block_fcp->ipl_info.fcp.br_lba);
1306DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1307 dump_block_fcp->ipl_info.fcp.devno);
1308
1309static struct attribute *dump_fcp_attrs[] = {
1310 &sys_dump_fcp_device_attr.attr,
1311 &sys_dump_fcp_wwpn_attr.attr,
1312 &sys_dump_fcp_lun_attr.attr,
1313 &sys_dump_fcp_bootprog_attr.attr,
1314 &sys_dump_fcp_br_lba_attr.attr,
1315 NULL,
1316};
1317
1318static struct attribute_group dump_fcp_attr_group = {
1319 .name = IPL_FCP_STR,
1320 .attrs = dump_fcp_attrs,
1321};
1322
1323
1324
1325DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
1326 dump_block_ccw->ipl_info.ccw.devno);
1327
1328static struct attribute *dump_ccw_attrs[] = {
1329 &sys_dump_ccw_device_attr.attr,
1330 NULL,
1331};
1332
1333static struct attribute_group dump_ccw_attr_group = {
1334 .name = IPL_CCW_STR,
1335 .attrs = dump_ccw_attrs,
1336};
1337
1338
1339
1340static int dump_set_type(enum dump_type type)
1341{
1342 if (!(dump_capabilities & type))
1343 return -EINVAL;
1344 switch (type) {
1345 case DUMP_TYPE_CCW:
1346 if (diag308_set_works)
1347 dump_method = DUMP_METHOD_CCW_DIAG;
1348 else if (MACHINE_IS_VM)
1349 dump_method = DUMP_METHOD_CCW_VM;
1350 else
1351 dump_method = DUMP_METHOD_CCW_CIO;
1352 break;
1353 case DUMP_TYPE_FCP:
1354 dump_method = DUMP_METHOD_FCP_DIAG;
1355 break;
1356 default:
1357 dump_method = DUMP_METHOD_NONE;
1358 }
1359 dump_type = type;
1360 return 0;
1361}
1362
1363static ssize_t dump_type_show(struct kobject *kobj,
1364 struct kobj_attribute *attr, char *page)
1365{
1366 return sprintf(page, "%s\n", dump_type_str(dump_type));
1367}
1368
1369static ssize_t dump_type_store(struct kobject *kobj,
1370 struct kobj_attribute *attr,
1371 const char *buf, size_t len)
1372{
1373 int rc = -EINVAL;
1374
1375 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1376 rc = dump_set_type(DUMP_TYPE_NONE);
1377 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1378 rc = dump_set_type(DUMP_TYPE_CCW);
1379 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1380 rc = dump_set_type(DUMP_TYPE_FCP);
1381 return (rc != 0) ? rc : len;
1382}
1383
1384static struct kobj_attribute dump_type_attr =
1385 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1386
1387static struct kset *dump_kset;
1388
1389static void __dump_run(void *unused)
1390{
1391 struct ccw_dev_id devid;
1392 static char buf[100];
1393
1394 switch (dump_method) {
1395 case DUMP_METHOD_CCW_CIO:
1396 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
1397 devid.ssid = 0;
1398 reipl_ccw_dev(&devid);
1399 break;
1400 case DUMP_METHOD_CCW_VM:
1401 sprintf(buf, "STORE STATUS");
1402 __cpcmd(buf, NULL, 0, NULL);
1403 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
1404 __cpcmd(buf, NULL, 0, NULL);
1405 break;
1406 case DUMP_METHOD_CCW_DIAG:
1407 diag308(DIAG308_SET, dump_block_ccw);
1408 diag308(DIAG308_DUMP, NULL);
1409 break;
1410 case DUMP_METHOD_FCP_DIAG:
1411 diag308(DIAG308_SET, dump_block_fcp);
1412 diag308(DIAG308_DUMP, NULL);
1413 break;
1414 default:
1415 break;
1416 }
1417}
1418
1419static void dump_run(struct shutdown_trigger *trigger)
1420{
1421 if (dump_method == DUMP_METHOD_NONE)
1422 return;
1423 smp_send_stop();
1424 smp_switch_to_ipl_cpu(__dump_run, NULL);
1425}
1426
1427static int __init dump_ccw_init(void)
1428{
1429 int rc;
1430
1431 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1432 if (!dump_block_ccw)
1433 return -ENOMEM;
1434 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1435 if (rc) {
1436 free_page((unsigned long)dump_block_ccw);
1437 return rc;
1438 }
1439 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1440 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1441 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1442 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1443 dump_capabilities |= DUMP_TYPE_CCW;
1444 return 0;
1445}
1446
1447static int __init dump_fcp_init(void)
1448{
1449 int rc;
1450
1451 if (!sclp_ipl_info.has_dump)
1452 return 0;
1453 if (!diag308_set_works)
1454 return 0;
1455 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1456 if (!dump_block_fcp)
1457 return -ENOMEM;
1458 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1459 if (rc) {
1460 free_page((unsigned long)dump_block_fcp);
1461 return rc;
1462 }
1463 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1464 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1465 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1466 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1467 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1468 dump_capabilities |= DUMP_TYPE_FCP;
1469 return 0;
1470}
1471
1472static int __init dump_init(void)
1473{
1474 int rc;
1475
1476 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1477 if (!dump_kset)
1478 return -ENOMEM;
1479 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1480 if (rc) {
1481 kset_unregister(dump_kset);
1482 return rc;
1483 }
1484 rc = dump_ccw_init();
1485 if (rc)
1486 return rc;
1487 rc = dump_fcp_init();
1488 if (rc)
1489 return rc;
1490 dump_set_type(DUMP_TYPE_NONE);
1491 return 0;
1492}
1493
1494static struct shutdown_action __refdata dump_action = {
1495 .name = SHUTDOWN_ACTION_DUMP_STR,
1496 .fn = dump_run,
1497 .init = dump_init,
1498};
1499
1500static void dump_reipl_run(struct shutdown_trigger *trigger)
1501{
1502 preempt_disable();
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512#ifdef CONFIG_64BIT
1513 asm volatile("sturg %0,%1"
1514 :: "a" ((unsigned long) reipl_block_actual),
1515 "a" (&lowcore_ptr[smp_processor_id()]->ipib));
1516#else
1517 asm volatile("stura %0,%1"
1518 :: "a" ((unsigned long) reipl_block_actual),
1519 "a" (&lowcore_ptr[smp_processor_id()]->ipib));
1520#endif
1521 asm volatile("stura %0,%1"
1522 :: "a" (csum_partial(reipl_block_actual,
1523 reipl_block_actual->hdr.len, 0)),
1524 "a" (&lowcore_ptr[smp_processor_id()]->ipib_checksum));
1525 preempt_enable();
1526 dump_run(trigger);
1527}
1528
1529static int __init dump_reipl_init(void)
1530{
1531 if (!diag308_set_works)
1532 return -EOPNOTSUPP;
1533 else
1534 return 0;
1535}
1536
1537static struct shutdown_action __refdata dump_reipl_action = {
1538 .name = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1539 .fn = dump_reipl_run,
1540 .init = dump_reipl_init,
1541};
1542
1543
1544
1545
1546
1547static char vmcmd_on_reboot[128];
1548static char vmcmd_on_panic[128];
1549static char vmcmd_on_halt[128];
1550static char vmcmd_on_poff[128];
1551static char vmcmd_on_restart[128];
1552
1553DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1554DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1555DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1556DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1557DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1558
1559static struct attribute *vmcmd_attrs[] = {
1560 &sys_vmcmd_on_reboot_attr.attr,
1561 &sys_vmcmd_on_panic_attr.attr,
1562 &sys_vmcmd_on_halt_attr.attr,
1563 &sys_vmcmd_on_poff_attr.attr,
1564 &sys_vmcmd_on_restart_attr.attr,
1565 NULL,
1566};
1567
1568static struct attribute_group vmcmd_attr_group = {
1569 .attrs = vmcmd_attrs,
1570};
1571
1572static struct kset *vmcmd_kset;
1573
1574static void vmcmd_run(struct shutdown_trigger *trigger)
1575{
1576 char *cmd, *next_cmd;
1577
1578 if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1579 cmd = vmcmd_on_reboot;
1580 else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1581 cmd = vmcmd_on_panic;
1582 else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1583 cmd = vmcmd_on_halt;
1584 else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1585 cmd = vmcmd_on_poff;
1586 else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
1587 cmd = vmcmd_on_restart;
1588 else
1589 return;
1590
1591 if (strlen(cmd) == 0)
1592 return;
1593 do {
1594 next_cmd = strchr(cmd, '\n');
1595 if (next_cmd) {
1596 next_cmd[0] = 0;
1597 next_cmd += 1;
1598 }
1599 __cpcmd(cmd, NULL, 0, NULL);
1600 cmd = next_cmd;
1601 } while (cmd != NULL);
1602}
1603
1604static int vmcmd_init(void)
1605{
1606 if (!MACHINE_IS_VM)
1607 return -EOPNOTSUPP;
1608 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1609 if (!vmcmd_kset)
1610 return -ENOMEM;
1611 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1612}
1613
1614static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1615 vmcmd_run, vmcmd_init};
1616
1617
1618
1619
1620
1621static void stop_run(struct shutdown_trigger *trigger)
1622{
1623 if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
1624 strcmp(trigger->name, ON_RESTART_STR) == 0)
1625 disabled_wait((unsigned long) __builtin_return_address(0));
1626 while (sigp(smp_processor_id(), sigp_stop) == sigp_busy)
1627 cpu_relax();
1628 for (;;);
1629}
1630
1631static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1632 stop_run, NULL};
1633
1634
1635
1636static struct shutdown_action *shutdown_actions_list[] = {
1637 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1638 &vmcmd_action, &stop_action};
1639#define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1640
1641
1642
1643
1644
1645static struct kset *shutdown_actions_kset;
1646
1647static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1648 size_t len)
1649{
1650 int i;
1651
1652 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1653 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1654 if (shutdown_actions_list[i]->init_rc) {
1655 return shutdown_actions_list[i]->init_rc;
1656 } else {
1657 trigger->action = shutdown_actions_list[i];
1658 return len;
1659 }
1660 }
1661 }
1662 return -EINVAL;
1663}
1664
1665
1666
1667static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1668 &reipl_action};
1669
1670static ssize_t on_reboot_show(struct kobject *kobj,
1671 struct kobj_attribute *attr, char *page)
1672{
1673 return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1674}
1675
1676static ssize_t on_reboot_store(struct kobject *kobj,
1677 struct kobj_attribute *attr,
1678 const char *buf, size_t len)
1679{
1680 return set_trigger(buf, &on_reboot_trigger, len);
1681}
1682
1683static struct kobj_attribute on_reboot_attr =
1684 __ATTR(on_reboot, 0644, on_reboot_show, on_reboot_store);
1685
1686static void do_machine_restart(char *__unused)
1687{
1688 smp_send_stop();
1689 on_reboot_trigger.action->fn(&on_reboot_trigger);
1690 reipl_run(NULL);
1691}
1692void (*_machine_restart)(char *command) = do_machine_restart;
1693
1694
1695
1696static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1697
1698static ssize_t on_panic_show(struct kobject *kobj,
1699 struct kobj_attribute *attr, char *page)
1700{
1701 return sprintf(page, "%s\n", on_panic_trigger.action->name);
1702}
1703
1704static ssize_t on_panic_store(struct kobject *kobj,
1705 struct kobj_attribute *attr,
1706 const char *buf, size_t len)
1707{
1708 return set_trigger(buf, &on_panic_trigger, len);
1709}
1710
1711static struct kobj_attribute on_panic_attr =
1712 __ATTR(on_panic, 0644, on_panic_show, on_panic_store);
1713
1714static void do_panic(void)
1715{
1716 on_panic_trigger.action->fn(&on_panic_trigger);
1717 stop_run(&on_panic_trigger);
1718}
1719
1720
1721
1722static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
1723 &stop_action};
1724
1725static ssize_t on_restart_show(struct kobject *kobj,
1726 struct kobj_attribute *attr, char *page)
1727{
1728 return sprintf(page, "%s\n", on_restart_trigger.action->name);
1729}
1730
1731static ssize_t on_restart_store(struct kobject *kobj,
1732 struct kobj_attribute *attr,
1733 const char *buf, size_t len)
1734{
1735 return set_trigger(buf, &on_restart_trigger, len);
1736}
1737
1738static struct kobj_attribute on_restart_attr =
1739 __ATTR(on_restart, 0644, on_restart_show, on_restart_store);
1740
1741void do_restart(void)
1742{
1743 smp_restart_with_online_cpu();
1744 smp_send_stop();
1745#ifdef CONFIG_CRASH_DUMP
1746 crash_kexec(NULL);
1747#endif
1748 on_restart_trigger.action->fn(&on_restart_trigger);
1749 stop_run(&on_restart_trigger);
1750}
1751
1752
1753
1754static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1755
1756static ssize_t on_halt_show(struct kobject *kobj,
1757 struct kobj_attribute *attr, char *page)
1758{
1759 return sprintf(page, "%s\n", on_halt_trigger.action->name);
1760}
1761
1762static ssize_t on_halt_store(struct kobject *kobj,
1763 struct kobj_attribute *attr,
1764 const char *buf, size_t len)
1765{
1766 return set_trigger(buf, &on_halt_trigger, len);
1767}
1768
1769static struct kobj_attribute on_halt_attr =
1770 __ATTR(on_halt, 0644, on_halt_show, on_halt_store);
1771
1772
1773static void do_machine_halt(void)
1774{
1775 smp_send_stop();
1776 on_halt_trigger.action->fn(&on_halt_trigger);
1777 stop_run(&on_halt_trigger);
1778}
1779void (*_machine_halt)(void) = do_machine_halt;
1780
1781
1782
1783static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1784
1785static ssize_t on_poff_show(struct kobject *kobj,
1786 struct kobj_attribute *attr, char *page)
1787{
1788 return sprintf(page, "%s\n", on_poff_trigger.action->name);
1789}
1790
1791static ssize_t on_poff_store(struct kobject *kobj,
1792 struct kobj_attribute *attr,
1793 const char *buf, size_t len)
1794{
1795 return set_trigger(buf, &on_poff_trigger, len);
1796}
1797
1798static struct kobj_attribute on_poff_attr =
1799 __ATTR(on_poff, 0644, on_poff_show, on_poff_store);
1800
1801
1802static void do_machine_power_off(void)
1803{
1804 smp_send_stop();
1805 on_poff_trigger.action->fn(&on_poff_trigger);
1806 stop_run(&on_poff_trigger);
1807}
1808void (*_machine_power_off)(void) = do_machine_power_off;
1809
1810static void __init shutdown_triggers_init(void)
1811{
1812 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1813 firmware_kobj);
1814 if (!shutdown_actions_kset)
1815 goto fail;
1816 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1817 &on_reboot_attr.attr))
1818 goto fail;
1819 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1820 &on_panic_attr.attr))
1821 goto fail;
1822 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1823 &on_halt_attr.attr))
1824 goto fail;
1825 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1826 &on_poff_attr.attr))
1827 goto fail;
1828 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1829 &on_restart_attr.attr))
1830 goto fail;
1831 return;
1832fail:
1833 panic("shutdown_triggers_init failed\n");
1834}
1835
1836static void __init shutdown_actions_init(void)
1837{
1838 int i;
1839
1840 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1841 if (!shutdown_actions_list[i]->init)
1842 continue;
1843 shutdown_actions_list[i]->init_rc =
1844 shutdown_actions_list[i]->init();
1845 }
1846}
1847
1848static int __init s390_ipl_init(void)
1849{
1850 sclp_get_ipl_info(&sclp_ipl_info);
1851 shutdown_actions_init();
1852 shutdown_triggers_init();
1853 return 0;
1854}
1855
1856__initcall(s390_ipl_init);
1857
1858static void __init strncpy_skip_quote(char *dst, char *src, int n)
1859{
1860 int sx, dx;
1861
1862 dx = 0;
1863 for (sx = 0; src[sx] != 0; sx++) {
1864 if (src[sx] == '"')
1865 continue;
1866 dst[dx++] = src[sx];
1867 if (dx >= n)
1868 break;
1869 }
1870}
1871
1872static int __init vmcmd_on_reboot_setup(char *str)
1873{
1874 if (!MACHINE_IS_VM)
1875 return 1;
1876 strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1877 vmcmd_on_reboot[127] = 0;
1878 on_reboot_trigger.action = &vmcmd_action;
1879 return 1;
1880}
1881__setup("vmreboot=", vmcmd_on_reboot_setup);
1882
1883static int __init vmcmd_on_panic_setup(char *str)
1884{
1885 if (!MACHINE_IS_VM)
1886 return 1;
1887 strncpy_skip_quote(vmcmd_on_panic, str, 127);
1888 vmcmd_on_panic[127] = 0;
1889 on_panic_trigger.action = &vmcmd_action;
1890 return 1;
1891}
1892__setup("vmpanic=", vmcmd_on_panic_setup);
1893
1894static int __init vmcmd_on_halt_setup(char *str)
1895{
1896 if (!MACHINE_IS_VM)
1897 return 1;
1898 strncpy_skip_quote(vmcmd_on_halt, str, 127);
1899 vmcmd_on_halt[127] = 0;
1900 on_halt_trigger.action = &vmcmd_action;
1901 return 1;
1902}
1903__setup("vmhalt=", vmcmd_on_halt_setup);
1904
1905static int __init vmcmd_on_poff_setup(char *str)
1906{
1907 if (!MACHINE_IS_VM)
1908 return 1;
1909 strncpy_skip_quote(vmcmd_on_poff, str, 127);
1910 vmcmd_on_poff[127] = 0;
1911 on_poff_trigger.action = &vmcmd_action;
1912 return 1;
1913}
1914__setup("vmpoff=", vmcmd_on_poff_setup);
1915
1916static int on_panic_notify(struct notifier_block *self,
1917 unsigned long event, void *data)
1918{
1919 do_panic();
1920 return NOTIFY_OK;
1921}
1922
1923static struct notifier_block on_panic_nb = {
1924 .notifier_call = on_panic_notify,
1925 .priority = INT_MIN,
1926};
1927
1928void __init setup_ipl(void)
1929{
1930 ipl_info.type = get_ipl_type();
1931 switch (ipl_info.type) {
1932 case IPL_TYPE_CCW:
1933 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1934 ipl_info.data.ccw.dev_id.ssid = 0;
1935 break;
1936 case IPL_TYPE_FCP:
1937 case IPL_TYPE_FCP_DUMP:
1938 ipl_info.data.fcp.dev_id.devno =
1939 IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1940 ipl_info.data.fcp.dev_id.ssid = 0;
1941 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1942 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1943 break;
1944 case IPL_TYPE_NSS:
1945 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1946 sizeof(ipl_info.data.nss.name));
1947 break;
1948 case IPL_TYPE_UNKNOWN:
1949
1950 break;
1951 }
1952 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1953}
1954
1955void __init ipl_update_parameters(void)
1956{
1957 int rc;
1958
1959 rc = diag308(DIAG308_STORE, &ipl_block);
1960 if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
1961 diag308_set_works = 1;
1962}
1963
1964void __init ipl_save_parameters(void)
1965{
1966 struct cio_iplinfo iplinfo;
1967 void *src, *dst;
1968
1969 if (cio_get_iplinfo(&iplinfo))
1970 return;
1971
1972 ipl_devno = iplinfo.devno;
1973 ipl_flags |= IPL_DEVNO_VALID;
1974 if (!iplinfo.is_qdio)
1975 return;
1976 ipl_flags |= IPL_PARMBLOCK_VALID;
1977 src = (void *)(unsigned long)S390_lowcore.ipl_parmblock_ptr;
1978 dst = (void *)IPL_PARMBLOCK_ORIGIN;
1979 memmove(dst, src, PAGE_SIZE);
1980 S390_lowcore.ipl_parmblock_ptr = IPL_PARMBLOCK_ORIGIN;
1981}
1982
1983static LIST_HEAD(rcall);
1984static DEFINE_MUTEX(rcall_mutex);
1985
1986void register_reset_call(struct reset_call *reset)
1987{
1988 mutex_lock(&rcall_mutex);
1989 list_add(&reset->list, &rcall);
1990 mutex_unlock(&rcall_mutex);
1991}
1992EXPORT_SYMBOL_GPL(register_reset_call);
1993
1994void unregister_reset_call(struct reset_call *reset)
1995{
1996 mutex_lock(&rcall_mutex);
1997 list_del(&reset->list);
1998 mutex_unlock(&rcall_mutex);
1999}
2000EXPORT_SYMBOL_GPL(unregister_reset_call);
2001
2002static void do_reset_calls(void)
2003{
2004 struct reset_call *reset;
2005
2006#ifdef CONFIG_64BIT
2007 if (diag308_set_works) {
2008 diag308_reset();
2009 return;
2010 }
2011#endif
2012 list_for_each_entry(reset, &rcall, list)
2013 reset->fn();
2014}
2015
2016u32 dump_prefix_page;
2017
2018void s390_reset_system(void (*func)(void *), void *data)
2019{
2020 struct _lowcore *lc;
2021
2022 lc = (struct _lowcore *)(unsigned long) store_prefix();
2023
2024
2025 lc->panic_stack = S390_lowcore.panic_stack;
2026
2027
2028 dump_prefix_page = (u32)(unsigned long) lc;
2029
2030
2031 set_prefix(0);
2032
2033
2034 __ctl_clear_bit(0,28);
2035
2036
2037 S390_lowcore.mcck_new_psw.mask = psw_kernel_bits | PSW_MASK_DAT;
2038 S390_lowcore.mcck_new_psw.addr =
2039 PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;
2040
2041
2042 S390_lowcore.program_new_psw.mask = psw_kernel_bits | PSW_MASK_DAT;
2043 S390_lowcore.program_new_psw.addr =
2044 PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
2045
2046
2047 store_status();
2048
2049 do_reset_calls();
2050 if (func)
2051 func(data);
2052}
2053
