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[S390] kernel: Shutdown Actions Interface
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / arch / s390 / kernel / ipl.c
blobd73aff63725f4a53960c3ae51adc96a49d459957
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 (MACHINE_IS_VM)
599 reipl_method = REIPL_METHOD_CCW_VM;
600 else
601 reipl_method = REIPL_METHOD_CCW_CIO;
602 break;
603 case IPL_TYPE_FCP:
604 if (diag308_set_works)
605 reipl_method = REIPL_METHOD_FCP_RW_DIAG;
606 else if (MACHINE_IS_VM)
607 reipl_method = REIPL_METHOD_FCP_RO_VM;
608 else
609 reipl_method = REIPL_METHOD_FCP_RO_DIAG;
610 break;
611 case IPL_TYPE_FCP_DUMP:
612 reipl_method = REIPL_METHOD_FCP_DUMP;
613 break;
614 case IPL_TYPE_NSS:
615 reipl_method = REIPL_METHOD_NSS;
616 break;
617 case IPL_TYPE_UNKNOWN:
618 reipl_method = REIPL_METHOD_DEFAULT;
619 break;
620 default:
621 BUG();
622 }
623 reipl_type = type;
624 return 0;
625 }
626
627 static ssize_t reipl_type_show(struct kobject *kobj,
628 struct kobj_attribute *attr, char *page)
629 {
630 return sprintf(page, "%s\n", ipl_type_str(reipl_type));
631 }
632
633 static ssize_t reipl_type_store(struct kobject *kobj,
634 struct kobj_attribute *attr,
635 const char *buf, size_t len)
636 {
637 int rc = -EINVAL;
638
639 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
640 rc = reipl_set_type(IPL_TYPE_CCW);
641 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
642 rc = reipl_set_type(IPL_TYPE_FCP);
643 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
644 rc = reipl_set_type(IPL_TYPE_NSS);
645 return (rc != 0) ? rc : len;
646 }
647
648 static struct kobj_attribute reipl_type_attr =
649 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
650
651 static struct kset *reipl_kset;
652
653 void reipl_run(struct shutdown_trigger *trigger)
654 {
655 struct ccw_dev_id devid;
656 static char buf[100];
657 char loadparm[LOADPARM_LEN + 1];
658
659 switch (reipl_method) {
660 case REIPL_METHOD_CCW_CIO:
661 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
662 if (ipl_info.type == IPL_TYPE_CCW && devid.devno == ipl_devno)
663 diag308(DIAG308_IPL, NULL);
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 /* check if read scp info worked and set loadparm */
749 if (sclp_ipl_info.is_valid)
750 memcpy(reipl_block_ccw->ipl_info.ccw.load_param,
751 &sclp_ipl_info.loadparm, LOADPARM_LEN);
752 else
753 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
754 memset(reipl_block_ccw->ipl_info.ccw.load_param, 0x40,
755 LOADPARM_LEN);
756 /* FIXME: check for diag308_set_works when enabling diag ccw reipl */
757 if (!MACHINE_IS_VM)
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 (MACHINE_IS_VM)
880 dump_method = DUMP_METHOD_CCW_VM;
881 else
882 dump_method = DUMP_METHOD_CCW_CIO;
883 break;
884 case DUMP_TYPE_FCP:
885 dump_method = DUMP_METHOD_FCP_DIAG;
886 break;
887 default:
888 dump_method = DUMP_METHOD_NONE;
889 }
890 dump_type = type;
891 return 0;
892 }
893
894 static ssize_t dump_type_show(struct kobject *kobj,
895 struct kobj_attribute *attr, char *page)
896 {
897 return sprintf(page, "%s\n", dump_type_str(dump_type));
898 }
899
900 static ssize_t dump_type_store(struct kobject *kobj,
901 struct kobj_attribute *attr,
902 const char *buf, size_t len)
903 {
904 int rc = -EINVAL;
905
906 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
907 rc = dump_set_type(DUMP_TYPE_NONE);
908 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
909 rc = dump_set_type(DUMP_TYPE_CCW);
910 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
911 rc = dump_set_type(DUMP_TYPE_FCP);
912 return (rc != 0) ? rc : len;
913 }
914
915 static struct kobj_attribute dump_type_attr =
916 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
917
918 static struct kset *dump_kset;
919
920 static void dump_run(struct shutdown_trigger *trigger)
921 {
922 struct ccw_dev_id devid;
923 static char buf[100];
924
925 switch (dump_method) {
926 case DUMP_METHOD_CCW_CIO:
927 smp_send_stop();
928 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
929 devid.ssid = 0;
930 reipl_ccw_dev(&devid);
931 break;
932 case DUMP_METHOD_CCW_VM:
933 smp_send_stop();
934 sprintf(buf, "STORE STATUS");
935 __cpcmd(buf, NULL, 0, NULL);
936 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
937 __cpcmd(buf, NULL, 0, NULL);
938 break;
939 case DUMP_METHOD_CCW_DIAG:
940 diag308(DIAG308_SET, dump_block_ccw);
941 diag308(DIAG308_DUMP, NULL);
942 break;
943 case DUMP_METHOD_FCP_DIAG:
944 diag308(DIAG308_SET, dump_block_fcp);
945 diag308(DIAG308_DUMP, NULL);
946 break;
947 case DUMP_METHOD_NONE:
948 default:
949 return;
950 }
951 printk(KERN_EMERG "Dump failed!\n");
952 }
953
954 static int __init dump_ccw_init(void)
955 {
956 int rc;
957
958 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
959 if (!dump_block_ccw)
960 return -ENOMEM;
961 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
962 if (rc) {
963 free_page((unsigned long)dump_block_ccw);
964 return rc;
965 }
966 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
967 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
968 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
969 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
970 dump_capabilities |= DUMP_TYPE_CCW;
971 return 0;
972 }
973
974 static int __init dump_fcp_init(void)
975 {
976 int rc;
977
978 if (!sclp_ipl_info.has_dump)
979 return 0; /* LDIPL DUMP is not installed */
980 if (!diag308_set_works)
981 return 0;
982 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
983 if (!dump_block_fcp)
984 return -ENOMEM;
985 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
986 if (rc) {
987 free_page((unsigned long)dump_block_fcp);
988 return rc;
989 }
990 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
991 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
992 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
993 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
994 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
995 dump_capabilities |= DUMP_TYPE_FCP;
996 return 0;
997 }
998
999 static int dump_init(void)
1000 {
1001 int rc;
1002
1003 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1004 if (!dump_kset)
1005 return -ENOMEM;
1006 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1007 if (rc) {
1008 kset_unregister(dump_kset);
1009 return rc;
1010 }
1011 rc = dump_ccw_init();
1012 if (rc)
1013 return rc;
1014 rc = dump_fcp_init();
1015 if (rc)
1016 return rc;
1017 dump_set_type(DUMP_TYPE_NONE);
1018 return 0;
1019 }
1020
1021 static struct shutdown_action dump_action = {SHUTDOWN_ACTION_DUMP_STR,
1022 dump_run, dump_init};
1023
1024 /*
1025 * vmcmd shutdown action: Trigger vm command on shutdown.
1026 */
1027
1028 static char vmcmd_on_reboot[128];
1029 static char vmcmd_on_panic[128];
1030 static char vmcmd_on_halt[128];
1031 static char vmcmd_on_poff[128];
1032
1033 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1034 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1035 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1036 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1037
1038 static struct attribute *vmcmd_attrs[] = {
1039 &sys_vmcmd_on_reboot_attr.attr,
1040 &sys_vmcmd_on_panic_attr.attr,
1041 &sys_vmcmd_on_halt_attr.attr,
1042 &sys_vmcmd_on_poff_attr.attr,
1043 NULL,
1044 };
1045
1046 static struct attribute_group vmcmd_attr_group = {
1047 .attrs = vmcmd_attrs,
1048 };
1049
1050 static struct kset *vmcmd_kset;
1051
1052 static void vmcmd_run(struct shutdown_trigger *trigger)
1053 {
1054 char *cmd, *next_cmd;
1055
1056 if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1057 cmd = vmcmd_on_reboot;
1058 else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1059 cmd = vmcmd_on_panic;
1060 else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1061 cmd = vmcmd_on_halt;
1062 else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1063 cmd = vmcmd_on_poff;
1064 else
1065 return;
1066
1067 if (strlen(cmd) == 0)
1068 return;
1069 do {
1070 next_cmd = strchr(cmd, '\n');
1071 if (next_cmd) {
1072 next_cmd[0] = 0;
1073 next_cmd += 1;
1074 }
1075 __cpcmd(cmd, NULL, 0, NULL);
1076 cmd = next_cmd;
1077 } while (cmd != NULL);
1078 }
1079
1080 static int vmcmd_init(void)
1081 {
1082 if (!MACHINE_IS_VM)
1083 return -ENOTSUPP;
1084 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1085 if (!vmcmd_kset)
1086 return -ENOMEM;
1087 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1088 }
1089
1090 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1091 vmcmd_run, vmcmd_init};
1092
1093 /*
1094 * stop shutdown action: Stop Linux on shutdown.
1095 */
1096
1097 static void stop_run(struct shutdown_trigger *trigger)
1098 {
1099 signal_processor(smp_processor_id(), sigp_stop_and_store_status);
1100 for (;;);
1101 }
1102
1103 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1104 stop_run, NULL};
1105
1106 /* action list */
1107
1108 static struct shutdown_action *shutdown_actions_list[] = {
1109 &ipl_action, &reipl_action, &dump_action, &vmcmd_action, &stop_action};
1110 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1111
1112 /*
1113 * Trigger section
1114 */
1115
1116 static struct kset *shutdown_actions_kset;
1117
1118 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1119 size_t len)
1120 {
1121 int i;
1122 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1123 if (!shutdown_actions_list[i])
1124 continue;
1125 if (strncmp(buf, shutdown_actions_list[i]->name,
1126 strlen(shutdown_actions_list[i]->name)) == 0) {
1127 trigger->action = shutdown_actions_list[i];
1128 return len;
1129 }
1130 }
1131 return -EINVAL;
1132 }
1133
1134 /* on reipl */
1135
1136 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1137 &reipl_action};
1138
1139 static ssize_t on_reboot_show(struct kobject *kobj,
1140 struct kobj_attribute *attr, char *page)
1141 {
1142 return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1143 }
1144
1145 static ssize_t on_reboot_store(struct kobject *kobj,
1146 struct kobj_attribute *attr,
1147 const char *buf, size_t len)
1148 {
1149 return set_trigger(buf, &on_reboot_trigger, len);
1150 }
1151
1152 static struct kobj_attribute on_reboot_attr =
1153 __ATTR(on_reboot, 0644, on_reboot_show, on_reboot_store);
1154
1155 static void do_machine_restart(char *__unused)
1156 {
1157 smp_send_stop();
1158 on_reboot_trigger.action->fn(&on_reboot_trigger);
1159 reipl_run(NULL);
1160 }
1161 void (*_machine_restart)(char *command) = do_machine_restart;
1162
1163 /* on panic */
1164
1165 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1166
1167 static ssize_t on_panic_show(struct kobject *kobj,
1168 struct kobj_attribute *attr, char *page)
1169 {
1170 return sprintf(page, "%s\n", on_panic_trigger.action->name);
1171 }
1172
1173 static ssize_t on_panic_store(struct kobject *kobj,
1174 struct kobj_attribute *attr,
1175 const char *buf, size_t len)
1176 {
1177 return set_trigger(buf, &on_panic_trigger, len);
1178 }
1179
1180 static struct kobj_attribute on_panic_attr =
1181 __ATTR(on_panic, 0644, on_panic_show, on_panic_store);
1182
1183 static void do_panic(void)
1184 {
1185 on_panic_trigger.action->fn(&on_panic_trigger);
1186 stop_run(&on_panic_trigger);
1187 }
1188
1189 /* on halt */
1190
1191 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1192
1193 static ssize_t on_halt_show(struct kobject *kobj,
1194 struct kobj_attribute *attr, char *page)
1195 {
1196 return sprintf(page, "%s\n", on_halt_trigger.action->name);
1197 }
1198
1199 static ssize_t on_halt_store(struct kobject *kobj,
1200 struct kobj_attribute *attr,
1201 const char *buf, size_t len)
1202 {
1203 return set_trigger(buf, &on_halt_trigger, len);
1204 }
1205
1206 static struct kobj_attribute on_halt_attr =
1207 __ATTR(on_halt, 0644, on_halt_show, on_halt_store);
1208
1209
1210 static void do_machine_halt(void)
1211 {
1212 smp_send_stop();
1213 on_halt_trigger.action->fn(&on_halt_trigger);
1214 stop_run(&on_halt_trigger);
1215 }
1216 void (*_machine_halt)(void) = do_machine_halt;
1217
1218 /* on power off */
1219
1220 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1221
1222 static ssize_t on_poff_show(struct kobject *kobj,
1223 struct kobj_attribute *attr, char *page)
1224 {
1225 return sprintf(page, "%s\n", on_poff_trigger.action->name);
1226 }
1227
1228 static ssize_t on_poff_store(struct kobject *kobj,
1229 struct kobj_attribute *attr,
1230 const char *buf, size_t len)
1231 {
1232 return set_trigger(buf, &on_poff_trigger, len);
1233 }
1234
1235 static struct kobj_attribute on_poff_attr =
1236 __ATTR(on_poff, 0644, on_poff_show, on_poff_store);
1237
1238
1239 static void do_machine_power_off(void)
1240 {
1241 smp_send_stop();
1242 on_poff_trigger.action->fn(&on_poff_trigger);
1243 stop_run(&on_poff_trigger);
1244 }
1245 void (*_machine_power_off)(void) = do_machine_power_off;
1246
1247 static void __init shutdown_triggers_init(void)
1248 {
1249 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1250 firmware_kobj);
1251 if (!shutdown_actions_kset)
1252 goto fail;
1253 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1254 &on_reboot_attr.attr))
1255 goto fail;
1256 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1257 &on_panic_attr.attr))
1258 goto fail;
1259 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1260 &on_halt_attr.attr))
1261 goto fail;
1262 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1263 &on_poff_attr.attr))
1264 goto fail;
1265
1266 return;
1267 fail:
1268 panic("shutdown_triggers_init failed\n");
1269 }
1270
1271 static void __init shutdown_actions_init(void)
1272 {
1273 int i;
1274
1275 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1276 if (!shutdown_actions_list[i]->init)
1277 continue;
1278 if (shutdown_actions_list[i]->init())
1279 shutdown_actions_list[i] = NULL;
1280 }
1281 }
1282
1283 static int __init s390_ipl_init(void)
1284 {
1285 reipl_probe();
1286 shutdown_actions_init();
1287 shutdown_triggers_init();
1288 return 0;
1289 }
1290
1291 __initcall(s390_ipl_init);
1292
1293 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1294 {
1295 int sx, dx;
1296
1297 dx = 0;
1298 for (sx = 0; src[sx] != 0; sx++) {
1299 if (src[sx] == '"')
1300 continue;
1301 dst[dx++] = src[sx];
1302 if (dx >= n)
1303 break;
1304 }
1305 }
1306
1307 static int __init vmcmd_on_reboot_setup(char *str)
1308 {
1309 if (!MACHINE_IS_VM)
1310 return 1;
1311 strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1312 vmcmd_on_reboot[127] = 0;
1313 on_reboot_trigger.action = &vmcmd_action;
1314 return 1;
1315 }
1316 __setup("vmreboot=", vmcmd_on_reboot_setup);
1317
1318 static int __init vmcmd_on_panic_setup(char *str)
1319 {
1320 if (!MACHINE_IS_VM)
1321 return 1;
1322 strncpy_skip_quote(vmcmd_on_panic, str, 127);
1323 vmcmd_on_panic[127] = 0;
1324 on_panic_trigger.action = &vmcmd_action;
1325 return 1;
1326 }
1327 __setup("vmpanic=", vmcmd_on_panic_setup);
1328
1329 static int __init vmcmd_on_halt_setup(char *str)
1330 {
1331 if (!MACHINE_IS_VM)
1332 return 1;
1333 strncpy_skip_quote(vmcmd_on_halt, str, 127);
1334 vmcmd_on_halt[127] = 0;
1335 on_halt_trigger.action = &vmcmd_action;
1336 return 1;
1337 }
1338 __setup("vmhalt=", vmcmd_on_halt_setup);
1339
1340 static int __init vmcmd_on_poff_setup(char *str)
1341 {
1342 if (!MACHINE_IS_VM)
1343 return 1;
1344 strncpy_skip_quote(vmcmd_on_poff, str, 127);
1345 vmcmd_on_poff[127] = 0;
1346 on_poff_trigger.action = &vmcmd_action;
1347 return 1;
1348 }
1349 __setup("vmpoff=", vmcmd_on_poff_setup);
1350
1351 static int on_panic_notify(struct notifier_block *self,
1352 unsigned long event, void *data)
1353 {
1354 do_panic();
1355 return NOTIFY_OK;
1356 }
1357
1358 static struct notifier_block on_panic_nb = {
1359 .notifier_call = on_panic_notify,
1360 .priority = 0,
1361 };
1362
1363 void __init setup_ipl(void)
1364 {
1365 ipl_info.type = get_ipl_type();
1366 switch (ipl_info.type) {
1367 case IPL_TYPE_CCW:
1368 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1369 ipl_info.data.ccw.dev_id.ssid = 0;
1370 break;
1371 case IPL_TYPE_FCP:
1372 case IPL_TYPE_FCP_DUMP:
1373 ipl_info.data.fcp.dev_id.devno =
1374 IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1375 ipl_info.data.fcp.dev_id.ssid = 0;
1376 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1377 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1378 break;
1379 case IPL_TYPE_NSS:
1380 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1381 sizeof(ipl_info.data.nss.name));
1382 break;
1383 case IPL_TYPE_UNKNOWN:
1384 default:
1385 /* We have no info to copy */
1386 break;
1387 }
1388 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1389 }
1390
1391 void __init ipl_save_parameters(void)
1392 {
1393 struct cio_iplinfo iplinfo;
1394 unsigned int *ipl_ptr;
1395 void *src, *dst;
1396
1397 if (cio_get_iplinfo(&iplinfo))
1398 return;
1399
1400 ipl_devno = iplinfo.devno;
1401 ipl_flags |= IPL_DEVNO_VALID;
1402 if (!iplinfo.is_qdio)
1403 return;
1404 ipl_flags |= IPL_PARMBLOCK_VALID;
1405 ipl_ptr = (unsigned int *)__LC_IPL_PARMBLOCK_PTR;
1406 src = (void *)(unsigned long)*ipl_ptr;
1407 dst = (void *)IPL_PARMBLOCK_ORIGIN;
1408 memmove(dst, src, PAGE_SIZE);
1409 *ipl_ptr = IPL_PARMBLOCK_ORIGIN;
1410 }
1411
1412 static LIST_HEAD(rcall);
1413 static DEFINE_MUTEX(rcall_mutex);
1414
1415 void register_reset_call(struct reset_call *reset)
1416 {
1417 mutex_lock(&rcall_mutex);
1418 list_add(&reset->list, &rcall);
1419 mutex_unlock(&rcall_mutex);
1420 }
1421 EXPORT_SYMBOL_GPL(register_reset_call);
1422
1423 void unregister_reset_call(struct reset_call *reset)
1424 {
1425 mutex_lock(&rcall_mutex);
1426 list_del(&reset->list);
1427 mutex_unlock(&rcall_mutex);
1428 }
1429 EXPORT_SYMBOL_GPL(unregister_reset_call);
1430
1431 static void do_reset_calls(void)
1432 {
1433 struct reset_call *reset;
1434
1435 list_for_each_entry(reset, &rcall, list)
1436 reset->fn();
1437 }
1438
1439 u32 dump_prefix_page;
1440
1441 void s390_reset_system(void)
1442 {
1443 struct _lowcore *lc;
1444
1445 lc = (struct _lowcore *)(unsigned long) store_prefix();
1446
1447 /* Stack for interrupt/machine check handler */
1448 lc->panic_stack = S390_lowcore.panic_stack;
1449
1450 /* Save prefix page address for dump case */
1451 dump_prefix_page = (u32)(unsigned long) lc;
1452
1453 /* Disable prefixing */
1454 set_prefix(0);
1455
1456 /* Disable lowcore protection */
1457 __ctl_clear_bit(0,28);
1458
1459 /* Set new machine check handler */
1460 S390_lowcore.mcck_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
1461 S390_lowcore.mcck_new_psw.addr =
1462 PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;
1463
1464 /* Set new program check handler */
1465 S390_lowcore.program_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
1466 S390_lowcore.program_new_psw.addr =
1467 PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
1468
1469 do_reset_calls();
1470 }
1471
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree