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1 /*
2 * arch/s390/kernel/ipl.c
3 * ipl/reipl/dump support for Linux on s390.
4 *
5 * Copyright IBM Corp. 2005,2007
6 * Author(s): Michael Holzheu <holzheu@de.ibm.com>
7 * Heiko Carstens <heiko.carstens@de.ibm.com>
8 * Volker Sameske <sameske@de.ibm.com>
9 */
10
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 <asm/ipl.h>
18 #include <asm/smp.h>
19 #include <asm/setup.h>
20 #include <asm/cpcmd.h>
21 #include <asm/cio.h>
22 #include <asm/ebcdic.h>
23 #include <asm/reset.h>
24 #include <asm/sclp.h>
25
26 #define IPL_PARM_BLOCK_VERSION 0
27
28 #define IPL_UNKNOWN_STR "unknown"
29 #define IPL_CCW_STR "ccw"
30 #define IPL_FCP_STR "fcp"
31 #define IPL_FCP_DUMP_STR "fcp_dump"
32 #define IPL_NSS_STR "nss"
33
34 #define DUMP_CCW_STR "ccw"
35 #define DUMP_FCP_STR "fcp"
36 #define DUMP_NONE_STR "none"
37
38 /*
39 * Four shutdown trigger types are supported:
40 * - panic
41 * - halt
42 * - power off
43 * - reipl
44 */
45 #define ON_PANIC_STR "on_panic"
46 #define ON_HALT_STR "on_halt"
47 #define ON_POFF_STR "on_poff"
48 #define ON_REIPL_STR "on_reboot"
49
50 struct shutdown_action;
51 struct shutdown_trigger {
52 char *name;
53 struct shutdown_action *action;
54 };
55
56 /*
57 * Five shutdown action types are supported:
58 */
59 #define SHUTDOWN_ACTION_IPL_STR "ipl"
60 #define SHUTDOWN_ACTION_REIPL_STR "reipl"
61 #define SHUTDOWN_ACTION_DUMP_STR "dump"
62 #define SHUTDOWN_ACTION_VMCMD_STR "vmcmd"
63 #define SHUTDOWN_ACTION_STOP_STR "stop"
64
65 struct shutdown_action {
66 char *name;
67 void (*fn) (struct shutdown_trigger *trigger);
68 int (*init) (void);
69 };
70
71 static char *ipl_type_str(enum ipl_type type)
72 {
73 switch (type) {
74 case IPL_TYPE_CCW:
75 return IPL_CCW_STR;
76 case IPL_TYPE_FCP:
77 return IPL_FCP_STR;
78 case IPL_TYPE_FCP_DUMP:
79 return IPL_FCP_DUMP_STR;
80 case IPL_TYPE_NSS:
81 return IPL_NSS_STR;
82 case IPL_TYPE_UNKNOWN:
83 default:
84 return IPL_UNKNOWN_STR;
85 }
86 }
87
88 enum dump_type {
89 DUMP_TYPE_NONE = 1,
90 DUMP_TYPE_CCW = 2,
91 DUMP_TYPE_FCP = 4,
92 };
93
94 static char *dump_type_str(enum dump_type type)
95 {
96 switch (type) {
97 case DUMP_TYPE_NONE:
98 return DUMP_NONE_STR;
99 case DUMP_TYPE_CCW:
100 return DUMP_CCW_STR;
101 case DUMP_TYPE_FCP:
102 return DUMP_FCP_STR;
103 default:
104 return NULL;
105 }
106 }
107
108 /*
109 * Must be in data section since the bss section
110 * is not cleared when these are accessed.
111 */
112 static u16 ipl_devno __attribute__((__section__(".data"))) = 0;
113 u32 ipl_flags __attribute__((__section__(".data"))) = 0;
114
115 enum ipl_method {
116 REIPL_METHOD_CCW_CIO,
117 REIPL_METHOD_CCW_DIAG,
118 REIPL_METHOD_CCW_VM,
119 REIPL_METHOD_FCP_RO_DIAG,
120 REIPL_METHOD_FCP_RW_DIAG,
121 REIPL_METHOD_FCP_RO_VM,
122 REIPL_METHOD_FCP_DUMP,
123 REIPL_METHOD_NSS,
124 REIPL_METHOD_DEFAULT,
125 };
126
127 enum dump_method {
128 DUMP_METHOD_NONE,
129 DUMP_METHOD_CCW_CIO,
130 DUMP_METHOD_CCW_DIAG,
131 DUMP_METHOD_CCW_VM,
132 DUMP_METHOD_FCP_DIAG,
133 };
134
135 static int diag308_set_works = 0;
136
137 static int reipl_capabilities = IPL_TYPE_UNKNOWN;
138
139 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
140 static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
141 static struct ipl_parameter_block *reipl_block_fcp;
142 static struct ipl_parameter_block *reipl_block_ccw;
143
144 static char reipl_nss_name[NSS_NAME_SIZE + 1];
145
146 static int dump_capabilities = DUMP_TYPE_NONE;
147 static enum dump_type dump_type = DUMP_TYPE_NONE;
148 static enum dump_method dump_method = DUMP_METHOD_NONE;
149 static struct ipl_parameter_block *dump_block_fcp;
150 static struct ipl_parameter_block *dump_block_ccw;
151
152 static struct sclp_ipl_info sclp_ipl_info;
153
154 int diag308(unsigned long subcode, void *addr)
155 {
156 register unsigned long _addr asm("0") = (unsigned long) addr;
157 register unsigned long _rc asm("1") = 0;
158
159 asm volatile(
160 " diag %0,%2,0x308\n"
161 "0:\n"
162 EX_TABLE(0b,0b)
163 : "+d" (_addr), "+d" (_rc)
164 : "d" (subcode) : "cc", "memory");
165 return _rc;
166 }
167 EXPORT_SYMBOL_GPL(diag308);
168
169 /* SYSFS */
170
171 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
172 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
173 struct kobj_attribute *attr, \
174 char *page) \
175 { \
176 return sprintf(page, _format, _value); \
177 } \
178 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
179 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL);
180
181 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
182 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
183 struct kobj_attribute *attr, \
184 char *page) \
185 { \
186 return sprintf(page, _fmt_out, \
187 (unsigned long long) _value); \
188 } \
189 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
190 struct kobj_attribute *attr, \
191 const char *buf, size_t len) \
192 { \
193 unsigned long long value; \
194 if (sscanf(buf, _fmt_in, &value) != 1) \
195 return -EINVAL; \
196 _value = value; \
197 return len; \
198 } \
199 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
200 __ATTR(_name,(S_IRUGO | S_IWUSR), \
201 sys_##_prefix##_##_name##_show, \
202 sys_##_prefix##_##_name##_store);
203
204 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
205 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
206 struct kobj_attribute *attr, \
207 char *page) \
208 { \
209 return sprintf(page, _fmt_out, _value); \
210 } \
211 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
212 struct kobj_attribute *attr, \
213 const char *buf, size_t len) \
214 { \
215 strncpy(_value, buf, sizeof(_value) - 1); \
216 strstrip(_value); \
217 return len; \
218 } \
219 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
220 __ATTR(_name,(S_IRUGO | S_IWUSR), \
221 sys_##_prefix##_##_name##_show, \
222 sys_##_prefix##_##_name##_store);
223
224 static void make_attrs_ro(struct attribute **attrs)
225 {
226 while (*attrs) {
227 (*attrs)->mode = S_IRUGO;
228 attrs++;
229 }
230 }
231
232 /*
233 * ipl section
234 */
235
236 static __init enum ipl_type get_ipl_type(void)
237 {
238 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
239
240 if (ipl_flags & IPL_NSS_VALID)
241 return IPL_TYPE_NSS;
242 if (!(ipl_flags & IPL_DEVNO_VALID))
243 return IPL_TYPE_UNKNOWN;
244 if (!(ipl_flags & IPL_PARMBLOCK_VALID))
245 return IPL_TYPE_CCW;
246 if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
247 return IPL_TYPE_UNKNOWN;
248 if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
249 return IPL_TYPE_UNKNOWN;
250 if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
251 return IPL_TYPE_FCP_DUMP;
252 return IPL_TYPE_FCP;
253 }
254
255 struct ipl_info ipl_info;
256 EXPORT_SYMBOL_GPL(ipl_info);
257
258 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
259 char *page)
260 {
261 return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
262 }
263
264 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
265
266 static ssize_t sys_ipl_device_show(struct kobject *kobj,
267 struct kobj_attribute *attr, char *page)
268 {
269 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
270
271 switch (ipl_info.type) {
272 case IPL_TYPE_CCW:
273 return sprintf(page, "0.0.%04x\n", ipl_devno);
274 case IPL_TYPE_FCP:
275 case IPL_TYPE_FCP_DUMP:
276 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
277 default:
278 return 0;
279 }
280 }
281
282 static struct kobj_attribute sys_ipl_device_attr =
283 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
284
285 static ssize_t ipl_parameter_read(struct kobject *kobj, struct bin_attribute *attr,
286 char *buf, loff_t off, size_t count)
287 {
288 unsigned int size = IPL_PARMBLOCK_SIZE;
289
290 if (off > size)
291 return 0;
292 if (off + count > size)
293 count = size - off;
294 memcpy(buf, (void *)IPL_PARMBLOCK_START + off, count);
295 return count;
296 }
297
298 static struct bin_attribute ipl_parameter_attr = {
299 .attr = {
300 .name = "binary_parameter",
301 .mode = S_IRUGO,
302 },
303 .size = PAGE_SIZE,
304 .read = &ipl_parameter_read,
305 };
306
307 static ssize_t ipl_scp_data_read(struct kobject *kobj, struct bin_attribute *attr,
308 char *buf, loff_t off, size_t count)
309 {
310 unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
311 void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
312
313 if (off > size)
314 return 0;
315 if (off + count > size)
316 count = size - off;
317 memcpy(buf, scp_data + off, count);
318 return count;
319 }
320
321 static struct bin_attribute ipl_scp_data_attr = {
322 .attr = {
323 .name = "scp_data",
324 .mode = S_IRUGO,
325 },
326 .size = PAGE_SIZE,
327 .read = ipl_scp_data_read,
328 };
329
330 /* FCP ipl device attributes */
331
332 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
333 IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
334 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
335 IPL_PARMBLOCK_START->ipl_info.fcp.lun);
336 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
337 IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
338 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
339 IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
340
341 static struct attribute *ipl_fcp_attrs[] = {
342 &sys_ipl_type_attr.attr,
343 &sys_ipl_device_attr.attr,
344 &sys_ipl_fcp_wwpn_attr.attr,
345 &sys_ipl_fcp_lun_attr.attr,
346 &sys_ipl_fcp_bootprog_attr.attr,
347 &sys_ipl_fcp_br_lba_attr.attr,
348 NULL,
349 };
350
351 static struct attribute_group ipl_fcp_attr_group = {
352 .attrs = ipl_fcp_attrs,
353 };
354
355 /* CCW ipl device attributes */
356
357 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
358 struct kobj_attribute *attr, char *page)
359 {
360 char loadparm[LOADPARM_LEN + 1] = {};
361
362 if (!sclp_ipl_info.is_valid)
363 return sprintf(page, "#unknown#\n");
364 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
365 EBCASC(loadparm, LOADPARM_LEN);
366 strstrip(loadparm);
367 return sprintf(page, "%s\n", loadparm);
368 }
369
370 static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
371 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
372
373 static struct attribute *ipl_ccw_attrs[] = {
374 &sys_ipl_type_attr.attr,
375 &sys_ipl_device_attr.attr,
376 &sys_ipl_ccw_loadparm_attr.attr,
377 NULL,
378 };
379
380 static struct attribute_group ipl_ccw_attr_group = {
381 .attrs = ipl_ccw_attrs,
382 };
383
384 /* NSS ipl device attributes */
385
386 DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
387
388 static struct attribute *ipl_nss_attrs[] = {
389 &sys_ipl_type_attr.attr,
390 &sys_ipl_nss_name_attr.attr,
391 NULL,
392 };
393
394 static struct attribute_group ipl_nss_attr_group = {
395 .attrs = ipl_nss_attrs,
396 };
397
398 /* UNKNOWN ipl device attributes */
399
400 static struct attribute *ipl_unknown_attrs[] = {
401 &sys_ipl_type_attr.attr,
402 NULL,
403 };
404
405 static struct attribute_group ipl_unknown_attr_group = {
406 .attrs = ipl_unknown_attrs,
407 };
408
409 static struct kset *ipl_kset;
410
411 static int __init ipl_register_fcp_files(void)
412 {
413 int rc;
414
415 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
416 if (rc)
417 goto out;
418 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
419 if (rc)
420 goto out_ipl_parm;
421 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_scp_data_attr);
422 if (!rc)
423 goto out;
424
425 sysfs_remove_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
426
427 out_ipl_parm:
428 sysfs_remove_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
429 out:
430 return rc;
431 }
432
433 static void ipl_run(struct shutdown_trigger *trigger)
434 {
435 diag308(DIAG308_IPL, NULL);
436 if (MACHINE_IS_VM)
437 __cpcmd("IPL", NULL, 0, NULL);
438 else if (ipl_info.type == IPL_TYPE_CCW)
439 reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
440 }
441
442 static int ipl_init(void)
443 {
444 int rc;
445
446 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
447 if (!ipl_kset) {
448 rc = -ENOMEM;
449 goto out;
450 }
451 switch (ipl_info.type) {
452 case IPL_TYPE_CCW:
453 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_ccw_attr_group);
454 break;
455 case IPL_TYPE_FCP:
456 case IPL_TYPE_FCP_DUMP:
457 rc = ipl_register_fcp_files();
458 break;
459 case IPL_TYPE_NSS:
460 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group);
461 break;
462 default:
463 rc = sysfs_create_group(&ipl_kset->kobj,
464 &ipl_unknown_attr_group);
465 break;
466 }
467 out:
468 if (rc)
469 panic("ipl_init failed: rc = %i\n", rc);
470
471 return 0;
472 }
473
474 static struct shutdown_action ipl_action = {SHUTDOWN_ACTION_IPL_STR, ipl_run,
475 ipl_init};
476
477 /*
478 * reipl shutdown action: Reboot Linux on shutdown.
479 */
480
481 /* FCP reipl device attributes */
482
483 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n",
484 reipl_block_fcp->ipl_info.fcp.wwpn);
485 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n",
486 reipl_block_fcp->ipl_info.fcp.lun);
487 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
488 reipl_block_fcp->ipl_info.fcp.bootprog);
489 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
490 reipl_block_fcp->ipl_info.fcp.br_lba);
491 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
492 reipl_block_fcp->ipl_info.fcp.devno);
493
494 static struct attribute *reipl_fcp_attrs[] = {
495 &sys_reipl_fcp_device_attr.attr,
496 &sys_reipl_fcp_wwpn_attr.attr,
497 &sys_reipl_fcp_lun_attr.attr,
498 &sys_reipl_fcp_bootprog_attr.attr,
499 &sys_reipl_fcp_br_lba_attr.attr,
500 NULL,
501 };
502
503 static struct attribute_group reipl_fcp_attr_group = {
504 .name = IPL_FCP_STR,
505 .attrs = reipl_fcp_attrs,
506 };
507
508 /* CCW reipl device attributes */
509
510 DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
511 reipl_block_ccw->ipl_info.ccw.devno);
512
513 static void reipl_get_ascii_loadparm(char *loadparm)
514 {
515 memcpy(loadparm, &reipl_block_ccw->ipl_info.ccw.load_param,
516 LOADPARM_LEN);
517 EBCASC(loadparm, LOADPARM_LEN);
518 loadparm[LOADPARM_LEN] = 0;
519 strstrip(loadparm);
520 }
521
522 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
523 struct kobj_attribute *attr, char *page)
524 {
525 char buf[LOADPARM_LEN + 1];
526
527 reipl_get_ascii_loadparm(buf);
528 return sprintf(page, "%s\n", buf);
529 }
530
531 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
532 struct kobj_attribute *attr,
533 const char *buf, size_t len)
534 {
535 int i, lp_len;
536
537 /* ignore trailing newline */
538 lp_len = len;
539 if ((len > 0) && (buf[len - 1] == '\n'))
540 lp_len--;
541 /* loadparm can have max 8 characters and must not start with a blank */
542 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
543 return -EINVAL;
544 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
545 for (i = 0; i < lp_len; i++) {
546 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
547 (buf[i] == '.'))
548 continue;
549 return -EINVAL;
550 }
551 /* initialize loadparm with blanks */
552 memset(&reipl_block_ccw->ipl_info.ccw.load_param, ' ', LOADPARM_LEN);
553 /* copy and convert to ebcdic */
554 memcpy(&reipl_block_ccw->ipl_info.ccw.load_param, buf, lp_len);
555 ASCEBC(reipl_block_ccw->ipl_info.ccw.load_param, LOADPARM_LEN);
556 return len;
557 }
558
559 static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
560 __ATTR(loadparm, 0644, reipl_ccw_loadparm_show,
561 reipl_ccw_loadparm_store);
562
563 static struct attribute *reipl_ccw_attrs[] = {
564 &sys_reipl_ccw_device_attr.attr,
565 &sys_reipl_ccw_loadparm_attr.attr,
566 NULL,
567 };
568
569 static struct attribute_group reipl_ccw_attr_group = {
570 .name = IPL_CCW_STR,
571 .attrs = reipl_ccw_attrs,
572 };
573
574
575 /* NSS reipl device attributes */
576
577 DEFINE_IPL_ATTR_STR_RW(reipl_nss, name, "%s\n", "%s\n", reipl_nss_name);
578
579 static struct attribute *reipl_nss_attrs[] = {
580 &sys_reipl_nss_name_attr.attr,
581 NULL,
582 };
583
584 static struct attribute_group reipl_nss_attr_group = {
585 .name = IPL_NSS_STR,
586 .attrs = reipl_nss_attrs,
587 };
588
589 /* reipl type */
590
591 static int reipl_set_type(enum ipl_type type)
592 {
593 if (!(reipl_capabilities & type))
594 return -EINVAL;
595
596 switch(type) {
597 case IPL_TYPE_CCW:
598 if (diag308_set_works)
599 reipl_method = REIPL_METHOD_CCW_DIAG;
600 else if (MACHINE_IS_VM)
601 reipl_method = REIPL_METHOD_CCW_VM;
602 else
603 reipl_method = REIPL_METHOD_CCW_CIO;
604 break;
605 case IPL_TYPE_FCP:
606 if (diag308_set_works)
607 reipl_method = REIPL_METHOD_FCP_RW_DIAG;
608 else if (MACHINE_IS_VM)
609 reipl_method = REIPL_METHOD_FCP_RO_VM;
610 else
611 reipl_method = REIPL_METHOD_FCP_RO_DIAG;
612 break;
613 case IPL_TYPE_FCP_DUMP:
614 reipl_method = REIPL_METHOD_FCP_DUMP;
615 break;
616 case IPL_TYPE_NSS:
617 reipl_method = REIPL_METHOD_NSS;
618 break;
619 case IPL_TYPE_UNKNOWN:
620 reipl_method = REIPL_METHOD_DEFAULT;
621 break;
622 default:
623 BUG();
624 }
625 reipl_type = type;
626 return 0;
627 }
628
629 static ssize_t reipl_type_show(struct kobject *kobj,
630 struct kobj_attribute *attr, char *page)
631 {
632 return sprintf(page, "%s\n", ipl_type_str(reipl_type));
633 }
634
635 static ssize_t reipl_type_store(struct kobject *kobj,
636 struct kobj_attribute *attr,
637 const char *buf, size_t len)
638 {
639 int rc = -EINVAL;
640
641 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
642 rc = reipl_set_type(IPL_TYPE_CCW);
643 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
644 rc = reipl_set_type(IPL_TYPE_FCP);
645 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
646 rc = reipl_set_type(IPL_TYPE_NSS);
647 return (rc != 0) ? rc : len;
648 }
649
650 static struct kobj_attribute reipl_type_attr =
651 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
652
653 static struct kset *reipl_kset;
654
655 void reipl_run(struct shutdown_trigger *trigger)
656 {
657 struct ccw_dev_id devid;
658 static char buf[100];
659 char loadparm[LOADPARM_LEN + 1];
660
661 switch (reipl_method) {
662 case REIPL_METHOD_CCW_CIO:
663 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
664 devid.ssid = 0;
665 reipl_ccw_dev(&devid);
666 break;
667 case REIPL_METHOD_CCW_VM:
668 reipl_get_ascii_loadparm(loadparm);
669 if (strlen(loadparm) == 0)
670 sprintf(buf, "IPL %X CLEAR",
671 reipl_block_ccw->ipl_info.ccw.devno);
672 else
673 sprintf(buf, "IPL %X CLEAR LOADPARM '%s'",
674 reipl_block_ccw->ipl_info.ccw.devno, loadparm);
675 __cpcmd(buf, NULL, 0, NULL);
676 break;
677 case REIPL_METHOD_CCW_DIAG:
678 diag308(DIAG308_SET, reipl_block_ccw);
679 diag308(DIAG308_IPL, NULL);
680 break;
681 case REIPL_METHOD_FCP_RW_DIAG:
682 diag308(DIAG308_SET, reipl_block_fcp);
683 diag308(DIAG308_IPL, NULL);
684 break;
685 case REIPL_METHOD_FCP_RO_DIAG:
686 diag308(DIAG308_IPL, NULL);
687 break;
688 case REIPL_METHOD_FCP_RO_VM:
689 __cpcmd("IPL", NULL, 0, NULL);
690 break;
691 case REIPL_METHOD_NSS:
692 sprintf(buf, "IPL %s", reipl_nss_name);
693 __cpcmd(buf, NULL, 0, NULL);
694 break;
695 case REIPL_METHOD_DEFAULT:
696 if (MACHINE_IS_VM)
697 __cpcmd("IPL", NULL, 0, NULL);
698 diag308(DIAG308_IPL, NULL);
699 break;
700 case REIPL_METHOD_FCP_DUMP:
701 default:
702 break;
703 }
704 }
705
706 static void __init reipl_probe(void)
707 {
708 void *buffer;
709
710 buffer = (void *) get_zeroed_page(GFP_KERNEL);
711 if (!buffer)
712 return;
713 if (diag308(DIAG308_STORE, buffer) == DIAG308_RC_OK)
714 diag308_set_works = 1;
715 free_page((unsigned long)buffer);
716 }
717
718 static int __init reipl_nss_init(void)
719 {
720 int rc;
721
722 if (!MACHINE_IS_VM)
723 return 0;
724 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
725 if (rc)
726 return rc;
727 strncpy(reipl_nss_name, kernel_nss_name, NSS_NAME_SIZE + 1);
728 reipl_capabilities |= IPL_TYPE_NSS;
729 return 0;
730 }
731
732 static int __init reipl_ccw_init(void)
733 {
734 int rc;
735
736 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
737 if (!reipl_block_ccw)
738 return -ENOMEM;
739 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_ccw_attr_group);
740 if (rc) {
741 free_page((unsigned long)reipl_block_ccw);
742 return rc;
743 }
744 reipl_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
745 reipl_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
746 reipl_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
747 reipl_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
748 reipl_block_ccw->hdr.flags = DIAG308_FLAGS_LP_VALID;
749 /* check if read scp info worked and set loadparm */
750 if (sclp_ipl_info.is_valid)
751 memcpy(reipl_block_ccw->ipl_info.ccw.load_param,
752 &sclp_ipl_info.loadparm, LOADPARM_LEN);
753 else
754 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
755 memset(reipl_block_ccw->ipl_info.ccw.load_param, 0x40,
756 LOADPARM_LEN);
757 if (!MACHINE_IS_VM && !diag308_set_works)
758 sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
759 if (ipl_info.type == IPL_TYPE_CCW)
760 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
761 reipl_capabilities |= IPL_TYPE_CCW;
762 return 0;
763 }
764
765 static int __init reipl_fcp_init(void)
766 {
767 int rc;
768
769 if ((!diag308_set_works) && (ipl_info.type != IPL_TYPE_FCP))
770 return 0;
771 if ((!diag308_set_works) && (ipl_info.type == IPL_TYPE_FCP))
772 make_attrs_ro(reipl_fcp_attrs);
773
774 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
775 if (!reipl_block_fcp)
776 return -ENOMEM;
777 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_fcp_attr_group);
778 if (rc) {
779 free_page((unsigned long)reipl_block_fcp);
780 return rc;
781 }
782 if (ipl_info.type == IPL_TYPE_FCP) {
783 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
784 } else {
785 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
786 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
787 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
788 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
789 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
790 }
791 reipl_capabilities |= IPL_TYPE_FCP;
792 return 0;
793 }
794
795 static int reipl_init(void)
796 {
797 int rc;
798
799 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
800 if (!reipl_kset)
801 return -ENOMEM;
802 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
803 if (rc) {
804 kset_unregister(reipl_kset);
805 return rc;
806 }
807 rc = reipl_ccw_init();
808 if (rc)
809 return rc;
810 rc = reipl_fcp_init();
811 if (rc)
812 return rc;
813 rc = reipl_nss_init();
814 if (rc)
815 return rc;
816 rc = reipl_set_type(ipl_info.type);
817 if (rc)
818 return rc;
819 return 0;
820 }
821
822 static struct shutdown_action reipl_action = {SHUTDOWN_ACTION_REIPL_STR,
823 reipl_run, reipl_init};
824
825 /*
826 * dump shutdown action: Dump Linux on shutdown.
827 */
828
829 /* FCP dump device attributes */
830
831 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n",
832 dump_block_fcp->ipl_info.fcp.wwpn);
833 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n",
834 dump_block_fcp->ipl_info.fcp.lun);
835 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
836 dump_block_fcp->ipl_info.fcp.bootprog);
837 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
838 dump_block_fcp->ipl_info.fcp.br_lba);
839 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
840 dump_block_fcp->ipl_info.fcp.devno);
841
842 static struct attribute *dump_fcp_attrs[] = {
843 &sys_dump_fcp_device_attr.attr,
844 &sys_dump_fcp_wwpn_attr.attr,
845 &sys_dump_fcp_lun_attr.attr,
846 &sys_dump_fcp_bootprog_attr.attr,
847 &sys_dump_fcp_br_lba_attr.attr,
848 NULL,
849 };
850
851 static struct attribute_group dump_fcp_attr_group = {
852 .name = IPL_FCP_STR,
853 .attrs = dump_fcp_attrs,
854 };
855
856 /* CCW dump device attributes */
857
858 DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
859 dump_block_ccw->ipl_info.ccw.devno);
860
861 static struct attribute *dump_ccw_attrs[] = {
862 &sys_dump_ccw_device_attr.attr,
863 NULL,
864 };
865
866 static struct attribute_group dump_ccw_attr_group = {
867 .name = IPL_CCW_STR,
868 .attrs = dump_ccw_attrs,
869 };
870
871 /* dump type */
872
873 static int dump_set_type(enum dump_type type)
874 {
875 if (!(dump_capabilities & type))
876 return -EINVAL;
877 switch (type) {
878 case DUMP_TYPE_CCW:
879 if (diag308_set_works)
880 dump_method = DUMP_METHOD_CCW_DIAG;
881 else if (MACHINE_IS_VM)
882 dump_method = DUMP_METHOD_CCW_VM;
883 else
884 dump_method = DUMP_METHOD_CCW_CIO;
885 break;
886 case DUMP_TYPE_FCP:
887 dump_method = DUMP_METHOD_FCP_DIAG;
888 break;
889 default:
890 dump_method = DUMP_METHOD_NONE;
891 }
892 dump_type = type;
893 return 0;
894 }
895
896 static ssize_t dump_type_show(struct kobject *kobj,
897 struct kobj_attribute *attr, char *page)
898 {
899 return sprintf(page, "%s\n", dump_type_str(dump_type));
900 }
901
902 static ssize_t dump_type_store(struct kobject *kobj,
903 struct kobj_attribute *attr,
904 const char *buf, size_t len)
905 {
906 int rc = -EINVAL;
907
908 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
909 rc = dump_set_type(DUMP_TYPE_NONE);
910 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
911 rc = dump_set_type(DUMP_TYPE_CCW);
912 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
913 rc = dump_set_type(DUMP_TYPE_FCP);
914 return (rc != 0) ? rc : len;
915 }
916
917 static struct kobj_attribute dump_type_attr =
918 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
919
920 static struct kset *dump_kset;
921
922 static void dump_run(struct shutdown_trigger *trigger)
923 {
924 struct ccw_dev_id devid;
925 static char buf[100];
926
927 switch (dump_method) {
928 case DUMP_METHOD_CCW_CIO:
929 smp_send_stop();
930 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
931 devid.ssid = 0;
932 reipl_ccw_dev(&devid);
933 break;
934 case DUMP_METHOD_CCW_VM:
935 smp_send_stop();
936 sprintf(buf, "STORE STATUS");
937 __cpcmd(buf, NULL, 0, NULL);
938 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
939 __cpcmd(buf, NULL, 0, NULL);
940 break;
941 case DUMP_METHOD_CCW_DIAG:
942 diag308(DIAG308_SET, dump_block_ccw);
943 diag308(DIAG308_DUMP, NULL);
944 break;
945 case DUMP_METHOD_FCP_DIAG:
946 diag308(DIAG308_SET, dump_block_fcp);
947 diag308(DIAG308_DUMP, NULL);
948 break;
949 case DUMP_METHOD_NONE:
950 default:
951 return;
952 }
953 printk(KERN_EMERG "Dump failed!\n");
954 }
955
956 static int __init dump_ccw_init(void)
957 {
958 int rc;
959
960 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
961 if (!dump_block_ccw)
962 return -ENOMEM;
963 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
964 if (rc) {
965 free_page((unsigned long)dump_block_ccw);
966 return rc;
967 }
968 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
969 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
970 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
971 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
972 dump_capabilities |= DUMP_TYPE_CCW;
973 return 0;
974 }
975
976 static int __init dump_fcp_init(void)
977 {
978 int rc;
979
980 if (!sclp_ipl_info.has_dump)
981 return 0; /* LDIPL DUMP is not installed */
982 if (!diag308_set_works)
983 return 0;
984 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
985 if (!dump_block_fcp)
986 return -ENOMEM;
987 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
988 if (rc) {
989 free_page((unsigned long)dump_block_fcp);
990 return rc;
991 }
992 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
993 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
994 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
995 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
996 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
997 dump_capabilities |= DUMP_TYPE_FCP;
998 return 0;
999 }
1000
1001 static int dump_init(void)
1002 {
1003 int rc;
1004
1005 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1006 if (!dump_kset)
1007 return -ENOMEM;
1008 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1009 if (rc) {
1010 kset_unregister(dump_kset);
1011 return rc;
1012 }
1013 rc = dump_ccw_init();
1014 if (rc)
1015 return rc;
1016 rc = dump_fcp_init();
1017 if (rc)
1018 return rc;
1019 dump_set_type(DUMP_TYPE_NONE);
1020 return 0;
1021 }
1022
1023 static struct shutdown_action dump_action = {SHUTDOWN_ACTION_DUMP_STR,
1024 dump_run, dump_init};
1025
1026 /*
1027 * vmcmd shutdown action: Trigger vm command on shutdown.
1028 */
1029
1030 static char vmcmd_on_reboot[128];
1031 static char vmcmd_on_panic[128];
1032 static char vmcmd_on_halt[128];
1033 static char vmcmd_on_poff[128];
1034
1035 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1036 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1037 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1038 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1039
1040 static struct attribute *vmcmd_attrs[] = {
1041 &sys_vmcmd_on_reboot_attr.attr,
1042 &sys_vmcmd_on_panic_attr.attr,
1043 &sys_vmcmd_on_halt_attr.attr,
1044 &sys_vmcmd_on_poff_attr.attr,
1045 NULL,
1046 };
1047
1048 static struct attribute_group vmcmd_attr_group = {
1049 .attrs = vmcmd_attrs,
1050 };
1051
1052 static struct kset *vmcmd_kset;
1053
1054 static void vmcmd_run(struct shutdown_trigger *trigger)
1055 {
1056 char *cmd, *next_cmd;
1057
1058 if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1059 cmd = vmcmd_on_reboot;
1060 else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1061 cmd = vmcmd_on_panic;
1062 else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1063 cmd = vmcmd_on_halt;
1064 else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1065 cmd = vmcmd_on_poff;
1066 else
1067 return;
1068
1069 if (strlen(cmd) == 0)
1070 return;
1071 do {
1072 next_cmd = strchr(cmd, '\n');
1073 if (next_cmd) {
1074 next_cmd[0] = 0;
1075 next_cmd += 1;
1076 }
1077 __cpcmd(cmd, NULL, 0, NULL);
1078 cmd = next_cmd;
1079 } while (cmd != NULL);
1080 }
1081
1082 static int vmcmd_init(void)
1083 {
1084 if (!MACHINE_IS_VM)
1085 return -ENOTSUPP;
1086 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1087 if (!vmcmd_kset)
1088 return -ENOMEM;
1089 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1090 }
1091
1092 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1093 vmcmd_run, vmcmd_init};
1094
1095 /*
1096 * stop shutdown action: Stop Linux on shutdown.
1097 */
1098
1099 static void stop_run(struct shutdown_trigger *trigger)
1100 {
1101 if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1102 disabled_wait((unsigned long) __builtin_return_address(0));
1103 else {
1104 signal_processor(smp_processor_id(), sigp_stop);
1105 for (;;);
1106 }
1107 }
1108
1109 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1110 stop_run, NULL};
1111
1112 /* action list */
1113
1114 static struct shutdown_action *shutdown_actions_list[] = {
1115 &ipl_action, &reipl_action, &dump_action, &vmcmd_action, &stop_action};
1116 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1117
1118 /*
1119 * Trigger section
1120 */
1121
1122 static struct kset *shutdown_actions_kset;
1123
1124 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1125 size_t len)
1126 {
1127 int i;
1128 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1129 if (!shutdown_actions_list[i])
1130 continue;
1131 if (strncmp(buf, shutdown_actions_list[i]->name,
1132 strlen(shutdown_actions_list[i]->name)) == 0) {
1133 trigger->action = shutdown_actions_list[i];
1134 return len;
1135 }
1136 }
1137 return -EINVAL;
1138 }
1139
1140 /* on reipl */
1141
1142 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1143 &reipl_action};
1144
1145 static ssize_t on_reboot_show(struct kobject *kobj,
1146 struct kobj_attribute *attr, char *page)
1147 {
1148 return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1149 }
1150
1151 static ssize_t on_reboot_store(struct kobject *kobj,
1152 struct kobj_attribute *attr,
1153 const char *buf, size_t len)
1154 {
1155 return set_trigger(buf, &on_reboot_trigger, len);
1156 }
1157
1158 static struct kobj_attribute on_reboot_attr =
1159 __ATTR(on_reboot, 0644, on_reboot_show, on_reboot_store);
1160
1161 static void do_machine_restart(char *__unused)
1162 {
1163 smp_send_stop();
1164 on_reboot_trigger.action->fn(&on_reboot_trigger);
1165 reipl_run(NULL);
1166 }
1167 void (*_machine_restart)(char *command) = do_machine_restart;
1168
1169 /* on panic */
1170
1171 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1172
1173 static ssize_t on_panic_show(struct kobject *kobj,
1174 struct kobj_attribute *attr, char *page)
1175 {
1176 return sprintf(page, "%s\n", on_panic_trigger.action->name);
1177 }
1178
1179 static ssize_t on_panic_store(struct kobject *kobj,
1180 struct kobj_attribute *attr,
1181 const char *buf, size_t len)
1182 {
1183 return set_trigger(buf, &on_panic_trigger, len);
1184 }
1185
1186 static struct kobj_attribute on_panic_attr =
1187 __ATTR(on_panic, 0644, on_panic_show, on_panic_store);
1188
1189 static void do_panic(void)
1190 {
1191 on_panic_trigger.action->fn(&on_panic_trigger);
1192 stop_run(&on_panic_trigger);
1193 }
1194
1195 /* on halt */
1196
1197 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1198
1199 static ssize_t on_halt_show(struct kobject *kobj,
1200 struct kobj_attribute *attr, char *page)
1201 {
1202 return sprintf(page, "%s\n", on_halt_trigger.action->name);
1203 }
1204
1205 static ssize_t on_halt_store(struct kobject *kobj,
1206 struct kobj_attribute *attr,
1207 const char *buf, size_t len)
1208 {
1209 return set_trigger(buf, &on_halt_trigger, len);
1210 }
1211
1212 static struct kobj_attribute on_halt_attr =
1213 __ATTR(on_halt, 0644, on_halt_show, on_halt_store);
1214
1215
1216 static void do_machine_halt(void)
1217 {
1218 smp_send_stop();
1219 on_halt_trigger.action->fn(&on_halt_trigger);
1220 stop_run(&on_halt_trigger);
1221 }
1222 void (*_machine_halt)(void) = do_machine_halt;
1223
1224 /* on power off */
1225
1226 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1227
1228 static ssize_t on_poff_show(struct kobject *kobj,
1229 struct kobj_attribute *attr, char *page)
1230 {
1231 return sprintf(page, "%s\n", on_poff_trigger.action->name);
1232 }
1233
1234 static ssize_t on_poff_store(struct kobject *kobj,
1235 struct kobj_attribute *attr,
1236 const char *buf, size_t len)
1237 {
1238 return set_trigger(buf, &on_poff_trigger, len);
1239 }
1240
1241 static struct kobj_attribute on_poff_attr =
1242 __ATTR(on_poff, 0644, on_poff_show, on_poff_store);
1243
1244
1245 static void do_machine_power_off(void)
1246 {
1247 smp_send_stop();
1248 on_poff_trigger.action->fn(&on_poff_trigger);
1249 stop_run(&on_poff_trigger);
1250 }
1251 void (*_machine_power_off)(void) = do_machine_power_off;
1252
1253 static void __init shutdown_triggers_init(void)
1254 {
1255 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1256 firmware_kobj);
1257 if (!shutdown_actions_kset)
1258 goto fail;
1259 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1260 &on_reboot_attr.attr))
1261 goto fail;
1262 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1263 &on_panic_attr.attr))
1264 goto fail;
1265 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1266 &on_halt_attr.attr))
1267 goto fail;
1268 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1269 &on_poff_attr.attr))
1270 goto fail;
1271
1272 return;
1273 fail:
1274 panic("shutdown_triggers_init failed\n");
1275 }
1276
1277 static void __init shutdown_actions_init(void)
1278 {
1279 int i;
1280
1281 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1282 if (!shutdown_actions_list[i]->init)
1283 continue;
1284 if (shutdown_actions_list[i]->init())
1285 shutdown_actions_list[i] = NULL;
1286 }
1287 }
1288
1289 static int __init s390_ipl_init(void)
1290 {
1291 reipl_probe();
1292 sclp_get_ipl_info(&sclp_ipl_info);
1293 shutdown_actions_init();
1294 shutdown_triggers_init();
1295 return 0;
1296 }
1297
1298 __initcall(s390_ipl_init);
1299
1300 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1301 {
1302 int sx, dx;
1303
1304 dx = 0;
1305 for (sx = 0; src[sx] != 0; sx++) {
1306 if (src[sx] == '"')
1307 continue;
1308 dst[dx++] = src[sx];
1309 if (dx >= n)
1310 break;
1311 }
1312 }
1313
1314 static int __init vmcmd_on_reboot_setup(char *str)
1315 {
1316 if (!MACHINE_IS_VM)
1317 return 1;
1318 strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1319 vmcmd_on_reboot[127] = 0;
1320 on_reboot_trigger.action = &vmcmd_action;
1321 return 1;
1322 }
1323 __setup("vmreboot=", vmcmd_on_reboot_setup);
1324
1325 static int __init vmcmd_on_panic_setup(char *str)
1326 {
1327 if (!MACHINE_IS_VM)
1328 return 1;
1329 strncpy_skip_quote(vmcmd_on_panic, str, 127);
1330 vmcmd_on_panic[127] = 0;
1331 on_panic_trigger.action = &vmcmd_action;
1332 return 1;
1333 }
1334 __setup("vmpanic=", vmcmd_on_panic_setup);
1335
1336 static int __init vmcmd_on_halt_setup(char *str)
1337 {
1338 if (!MACHINE_IS_VM)
1339 return 1;
1340 strncpy_skip_quote(vmcmd_on_halt, str, 127);
1341 vmcmd_on_halt[127] = 0;
1342 on_halt_trigger.action = &vmcmd_action;
1343 return 1;
1344 }
1345 __setup("vmhalt=", vmcmd_on_halt_setup);
1346
1347 static int __init vmcmd_on_poff_setup(char *str)
1348 {
1349 if (!MACHINE_IS_VM)
1350 return 1;
1351 strncpy_skip_quote(vmcmd_on_poff, str, 127);
1352 vmcmd_on_poff[127] = 0;
1353 on_poff_trigger.action = &vmcmd_action;
1354 return 1;
1355 }
1356 __setup("vmpoff=", vmcmd_on_poff_setup);
1357
1358 static int on_panic_notify(struct notifier_block *self,
1359 unsigned long event, void *data)
1360 {
1361 do_panic();
1362 return NOTIFY_OK;
1363 }
1364
1365 static struct notifier_block on_panic_nb = {
1366 .notifier_call = on_panic_notify,
1367 .priority = 0,
1368 };
1369
1370 void __init setup_ipl(void)
1371 {
1372 ipl_info.type = get_ipl_type();
1373 switch (ipl_info.type) {
1374 case IPL_TYPE_CCW:
1375 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1376 ipl_info.data.ccw.dev_id.ssid = 0;
1377 break;
1378 case IPL_TYPE_FCP:
1379 case IPL_TYPE_FCP_DUMP:
1380 ipl_info.data.fcp.dev_id.devno =
1381 IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1382 ipl_info.data.fcp.dev_id.ssid = 0;
1383 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1384 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1385 break;
1386 case IPL_TYPE_NSS:
1387 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1388 sizeof(ipl_info.data.nss.name));
1389 break;
1390 case IPL_TYPE_UNKNOWN:
1391 default:
1392 /* We have no info to copy */
1393 break;
1394 }
1395 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1396 }
1397
1398 void __init ipl_save_parameters(void)
1399 {
1400 struct cio_iplinfo iplinfo;
1401 unsigned int *ipl_ptr;
1402 void *src, *dst;
1403
1404 if (cio_get_iplinfo(&iplinfo))
1405 return;
1406
1407 ipl_devno = iplinfo.devno;
1408 ipl_flags |= IPL_DEVNO_VALID;
1409 if (!iplinfo.is_qdio)
1410 return;
1411 ipl_flags |= IPL_PARMBLOCK_VALID;
1412 ipl_ptr = (unsigned int *)__LC_IPL_PARMBLOCK_PTR;
1413 src = (void *)(unsigned long)*ipl_ptr;
1414 dst = (void *)IPL_PARMBLOCK_ORIGIN;
1415 memmove(dst, src, PAGE_SIZE);
1416 *ipl_ptr = IPL_PARMBLOCK_ORIGIN;
1417 }
1418
1419 static LIST_HEAD(rcall);
1420 static DEFINE_MUTEX(rcall_mutex);
1421
1422 void register_reset_call(struct reset_call *reset)
1423 {
1424 mutex_lock(&rcall_mutex);
1425 list_add(&reset->list, &rcall);
1426 mutex_unlock(&rcall_mutex);
1427 }
1428 EXPORT_SYMBOL_GPL(register_reset_call);
1429
1430 void unregister_reset_call(struct reset_call *reset)
1431 {
1432 mutex_lock(&rcall_mutex);
1433 list_del(&reset->list);
1434 mutex_unlock(&rcall_mutex);
1435 }
1436 EXPORT_SYMBOL_GPL(unregister_reset_call);
1437
1438 static void do_reset_calls(void)
1439 {
1440 struct reset_call *reset;
1441
1442 list_for_each_entry(reset, &rcall, list)
1443 reset->fn();
1444 }
1445
1446 u32 dump_prefix_page;
1447
1448 void s390_reset_system(void)
1449 {
1450 struct _lowcore *lc;
1451
1452 lc = (struct _lowcore *)(unsigned long) store_prefix();
1453
1454 /* Stack for interrupt/machine check handler */
1455 lc->panic_stack = S390_lowcore.panic_stack;
1456
1457 /* Save prefix page address for dump case */
1458 dump_prefix_page = (u32)(unsigned long) lc;
1459
1460 /* Disable prefixing */
1461 set_prefix(0);
1462
1463 /* Disable lowcore protection */
1464 __ctl_clear_bit(0,28);
1465
1466 /* Set new machine check handler */
1467 S390_lowcore.mcck_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
1468 S390_lowcore.mcck_new_psw.addr =
1469 PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;
1470
1471 /* Set new program check handler */
1472 S390_lowcore.program_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
1473 S390_lowcore.program_new_psw.addr =
1474 PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
1475
1476 do_reset_calls();
1477 }
1478
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