aboutsummaryrefslogtreecommitdiff
path: root/arch/s390/kernel/ipl.c
blob: 14bdde9def40b31e221a4c912dedc9dab713c200 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
/*
 *  arch/s390/kernel/ipl.c
 *    ipl/reipl/dump support for Linux on s390.
 *
 *    Copyright IBM Corp. 2005,2007
 *    Author(s): Michael Holzheu <holzheu@de.ibm.com>
 *		 Heiko Carstens <heiko.carstens@de.ibm.com>
 *		 Volker Sameske <sameske@de.ibm.com>
 */

#include <linux/types.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/reboot.h>
#include <linux/ctype.h>
#include <asm/ipl.h>
#include <asm/smp.h>
#include <asm/setup.h>
#include <asm/cpcmd.h>
#include <asm/cio.h>
#include <asm/ebcdic.h>
#include <asm/reset.h>
#include <asm/sclp.h>

#define IPL_PARM_BLOCK_VERSION 0

#define IPL_UNKNOWN_STR		"unknown"
#define IPL_CCW_STR		"ccw"
#define IPL_FCP_STR		"fcp"
#define IPL_FCP_DUMP_STR	"fcp_dump"
#define IPL_NSS_STR		"nss"

#define DUMP_CCW_STR		"ccw"
#define DUMP_FCP_STR		"fcp"
#define DUMP_NONE_STR		"none"

/*
 * Four shutdown trigger types are supported:
 * - panic
 * - halt
 * - power off
 * - reipl
 */
#define ON_PANIC_STR		"on_panic"
#define ON_HALT_STR		"on_halt"
#define ON_POFF_STR		"on_poff"
#define ON_REIPL_STR		"on_reboot"

struct shutdown_action;
struct shutdown_trigger {
	char *name;
	struct shutdown_action *action;
};

/*
 * Five shutdown action types are supported:
 */
#define SHUTDOWN_ACTION_IPL_STR		"ipl"
#define SHUTDOWN_ACTION_REIPL_STR	"reipl"
#define SHUTDOWN_ACTION_DUMP_STR	"dump"
#define SHUTDOWN_ACTION_VMCMD_STR	"vmcmd"
#define SHUTDOWN_ACTION_STOP_STR	"stop"

struct shutdown_action {
	char *name;
	void (*fn) (struct shutdown_trigger *trigger);
	int (*init) (void);
};

static char *ipl_type_str(enum ipl_type type)
{
	switch (type) {
	case IPL_TYPE_CCW:
		return IPL_CCW_STR;
	case IPL_TYPE_FCP:
		return IPL_FCP_STR;
	case IPL_TYPE_FCP_DUMP:
		return IPL_FCP_DUMP_STR;
	case IPL_TYPE_NSS:
		return IPL_NSS_STR;
	case IPL_TYPE_UNKNOWN:
	default:
		return IPL_UNKNOWN_STR;
	}
}

enum dump_type {
	DUMP_TYPE_NONE	= 1,
	DUMP_TYPE_CCW	= 2,
	DUMP_TYPE_FCP	= 4,
};

static char *dump_type_str(enum dump_type type)
{
	switch (type) {
	case DUMP_TYPE_NONE:
		return DUMP_NONE_STR;
	case DUMP_TYPE_CCW:
		return DUMP_CCW_STR;
	case DUMP_TYPE_FCP:
		return DUMP_FCP_STR;
	default:
		return NULL;
	}
}

/*
 * Must be in data section since the bss section
 * is not cleared when these are accessed.
 */
static u16 ipl_devno __attribute__((__section__(".data"))) = 0;
u32 ipl_flags __attribute__((__section__(".data"))) = 0;

enum ipl_method {
	REIPL_METHOD_CCW_CIO,
	REIPL_METHOD_CCW_DIAG,
	REIPL_METHOD_CCW_VM,
	REIPL_METHOD_FCP_RO_DIAG,
	REIPL_METHOD_FCP_RW_DIAG,
	REIPL_METHOD_FCP_RO_VM,
	REIPL_METHOD_FCP_DUMP,
	REIPL_METHOD_NSS,
	REIPL_METHOD_DEFAULT,
};

enum dump_method {
	DUMP_METHOD_NONE,
	DUMP_METHOD_CCW_CIO,
	DUMP_METHOD_CCW_DIAG,
	DUMP_METHOD_CCW_VM,
	DUMP_METHOD_FCP_DIAG,
};

static int diag308_set_works = 0;

static int reipl_capabilities = IPL_TYPE_UNKNOWN;

static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
static struct ipl_parameter_block *reipl_block_fcp;
static struct ipl_parameter_block *reipl_block_ccw;

static char reipl_nss_name[NSS_NAME_SIZE + 1];

static int dump_capabilities = DUMP_TYPE_NONE;
static enum dump_type dump_type = DUMP_TYPE_NONE;
static enum dump_method dump_method = DUMP_METHOD_NONE;
static struct ipl_parameter_block *dump_block_fcp;
static struct ipl_parameter_block *dump_block_ccw;

static struct sclp_ipl_info sclp_ipl_info;

int diag308(unsigned long subcode, void *addr)
{
	register unsigned long _addr asm("0") = (unsigned long) addr;
	register unsigned long _rc asm("1") = 0;

	asm volatile(
		"	diag	%0,%2,0x308\n"
		"0:\n"
		EX_TABLE(0b,0b)
		: "+d" (_addr), "+d" (_rc)
		: "d" (subcode) : "cc", "memory");
	return _rc;
}
EXPORT_SYMBOL_GPL(diag308);

/* SYSFS */

#define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value)		\
static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,	\
		struct kobj_attribute *attr,				\
		char *page)						\
{									\
	return sprintf(page, _format, _value);				\
}									\
static struct kobj_attribute sys_##_prefix##_##_name##_attr =		\
	__ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL);

#define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)	\
static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,	\
		struct kobj_attribute *attr,				\
		char *page)						\
{									\
	return sprintf(page, _fmt_out,					\
			(unsigned long long) _value);			\
}									\
static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,	\
		struct kobj_attribute *attr,				\
		const char *buf, size_t len)				\
{									\
	unsigned long long value;					\
	if (sscanf(buf, _fmt_in, &value) != 1)				\
		return -EINVAL;						\
	_value = value;							\
	return len;							\
}									\
static struct kobj_attribute sys_##_prefix##_##_name##_attr =		\
	__ATTR(_name,(S_IRUGO | S_IWUSR),				\
			sys_##_prefix##_##_name##_show,			\
			sys_##_prefix##_##_name##_store);

#define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,	\
		struct kobj_attribute *attr,				\
		char *page)						\
{									\
	return sprintf(page, _fmt_out, _value);				\
}									\
static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,	\
		struct kobj_attribute *attr,				\
		const char *buf, size_t len)				\
{									\
	strncpy(_value, buf, sizeof(_value) - 1);			\
	strstrip(_value);						\
	return len;							\
}									\
static struct kobj_attribute sys_##_prefix##_##_name##_attr =		\
	__ATTR(_name,(S_IRUGO | S_IWUSR),				\
			sys_##_prefix##_##_name##_show,			\
			sys_##_prefix##_##_name##_store);

static void make_attrs_ro(struct attribute **attrs)
{
	while (*attrs) {
		(*attrs)->mode = S_IRUGO;
		attrs++;
	}
}

/*
 * ipl section
 */

static __init enum ipl_type get_ipl_type(void)
{
	struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;

	if (ipl_flags & IPL_NSS_VALID)
		return IPL_TYPE_NSS;
	if (!(ipl_flags & IPL_DEVNO_VALID))
		return IPL_TYPE_UNKNOWN;
	if (!(ipl_flags & IPL_PARMBLOCK_VALID))
		return IPL_TYPE_CCW;
	if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
		return IPL_TYPE_UNKNOWN;
	if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
		return IPL_TYPE_UNKNOWN;
	if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
		return IPL_TYPE_FCP_DUMP;
	return IPL_TYPE_FCP;
}

struct ipl_info ipl_info;
EXPORT_SYMBOL_GPL(ipl_info);

static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
			     char *page)
{
	return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
}

static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);

static ssize_t sys_ipl_device_show(struct kobject *kobj,
				   struct kobj_attribute *attr, char *page)
{
	struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;

	switch (ipl_info.type) {
	case IPL_TYPE_CCW:
		return sprintf(page, "0.0.%04x\n", ipl_devno);
	case IPL_TYPE_FCP:
	case IPL_TYPE_FCP_DUMP:
		return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
	default:
		return 0;
	}
}

static struct kobj_attribute sys_ipl_device_attr =
	__ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);

static ssize_t ipl_parameter_read(struct kobject *kobj, struct bin_attribute *attr,
				  char *buf, loff_t off, size_t count)
{
	unsigned int size = IPL_PARMBLOCK_SIZE;

	if (off > size)
		return 0;
	if (off + count > size)
		count = size - off;
	memcpy(buf, (void *)IPL_PARMBLOCK_START + off, count);
	return count;
}

static struct bin_attribute ipl_parameter_attr = {
	.attr = {
		.name = "binary_parameter",
		.mode = S_IRUGO,
	},
	.size = PAGE_SIZE,
	.read = &ipl_parameter_read,
};

static ssize_t ipl_scp_data_read(struct kobject *kobj, struct bin_attribute *attr,
				 char *buf, loff_t off, size_t count)
{
	unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
	void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;

	if (off > size)
		return 0;
	if (off + count > size)
		count = size - off;
	memcpy(buf, scp_data + off, count);
	return count;
}

static struct bin_attribute ipl_scp_data_attr = {
	.attr = {
		.name = "scp_data",
		.mode = S_IRUGO,
	},
	.size = PAGE_SIZE,
	.read = ipl_scp_data_read,
};

/* FCP ipl device attributes */

DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
		   IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
		   IPL_PARMBLOCK_START->ipl_info.fcp.lun);
DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
		   IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
		   IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);

static struct attribute *ipl_fcp_attrs[] = {
	&sys_ipl_type_attr.attr,
	&sys_ipl_device_attr.attr,
	&sys_ipl_fcp_wwpn_attr.attr,
	&sys_ipl_fcp_lun_attr.attr,
	&sys_ipl_fcp_bootprog_attr.attr,
	&sys_ipl_fcp_br_lba_attr.attr,
	NULL,
};

static struct attribute_group ipl_fcp_attr_group = {
	.attrs = ipl_fcp_attrs,
};

/* CCW ipl device attributes */

static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
				     struct kobj_attribute *attr, char *page)
{
	char loadparm[LOADPARM_LEN + 1] = {};

	if (!sclp_ipl_info.is_valid)
		return sprintf(page, "#unknown#\n");
	memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
	EBCASC(loadparm, LOADPARM_LEN);
	strstrip(loadparm);
	return sprintf(page, "%s\n", loadparm);
}

static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
	__ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);

static struct attribute *ipl_ccw_attrs[] = {
	&sys_ipl_type_attr.attr,
	&sys_ipl_device_attr.attr,
	&sys_ipl_ccw_loadparm_attr.attr,
	NULL,
};

static struct attribute_group ipl_ccw_attr_group = {
	.attrs = ipl_ccw_attrs,
};

/* NSS ipl device attributes */

DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);

static struct attribute *ipl_nss_attrs[] = {
	&sys_ipl_type_attr.attr,
	&sys_ipl_nss_name_attr.attr,
	NULL,
};

static struct attribute_group ipl_nss_attr_group = {
	.attrs = ipl_nss_attrs,
};

/* UNKNOWN ipl device attributes */

static struct attribute *ipl_unknown_attrs[] = {
	&sys_ipl_type_attr.attr,
	NULL,
};

static struct attribute_group ipl_unknown_attr_group = {
	.attrs = ipl_unknown_attrs,
};

static struct kset *ipl_kset;

static int __init ipl_register_fcp_files(void)
{
	int rc;

	rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
	if (rc)
		goto out;
	rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
	if (rc)
		goto out_ipl_parm;
	rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_scp_data_attr);
	if (!rc)
		goto out;

	sysfs_remove_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);

out_ipl_parm:
	sysfs_remove_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
out:
	return rc;
}

static void ipl_run(struct shutdown_trigger *trigger)
{
	diag308(DIAG308_IPL, NULL);
	if (MACHINE_IS_VM)
		__cpcmd("IPL", NULL, 0, NULL);
	else if (ipl_info.type == IPL_TYPE_CCW)
		reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
}

static int ipl_init(void)
{
	int rc;

	ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
	if (!ipl_kset) {
		rc = -ENOMEM;
		goto out;
	}
	switch (ipl_info.type) {
	case IPL_TYPE_CCW:
		rc = sysfs_create_group(&ipl_kset->kobj, &ipl_ccw_attr_group);
		break;
	case IPL_TYPE_FCP:
	case IPL_TYPE_FCP_DUMP:
		rc = ipl_register_fcp_files();
		break;
	case IPL_TYPE_NSS:
		rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group);
		break;
	default:
		rc = sysfs_create_group(&ipl_kset->kobj,
					&ipl_unknown_attr_group);
		break;
	}
out:
	if (rc)
		panic("ipl_init failed: rc = %i\n", rc);

	return 0;
}

static struct shutdown_action ipl_action = {SHUTDOWN_ACTION_IPL_STR, ipl_run,
					    ipl_init};

/*
 * reipl shutdown action: Reboot Linux on shutdown.
 */

/* FCP reipl device attributes */

DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n",
		   reipl_block_fcp->ipl_info.fcp.wwpn);
DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n",
		   reipl_block_fcp->ipl_info.fcp.lun);
DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
		   reipl_block_fcp->ipl_info.fcp.bootprog);
DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
		   reipl_block_fcp->ipl_info.fcp.br_lba);
DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
		   reipl_block_fcp->ipl_info.fcp.devno);

static struct attribute *reipl_fcp_attrs[] = {
	&sys_reipl_fcp_device_attr.attr,
	&sys_reipl_fcp_wwpn_attr.attr,
	&sys_reipl_fcp_lun_attr.attr,
	&sys_reipl_fcp_bootprog_attr.attr,
	&sys_reipl_fcp_br_lba_attr.attr,
	NULL,
};

static struct attribute_group reipl_fcp_attr_group = {
	.name  = IPL_FCP_STR,
	.attrs = reipl_fcp_attrs,
};

/* CCW reipl device attributes */

DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
	reipl_block_ccw->ipl_info.ccw.devno);

static void reipl_get_ascii_loadparm(char *loadparm)
{
	memcpy(loadparm, &reipl_block_ccw->ipl_info.ccw.load_param,
	       LOADPARM_LEN);
	EBCASC(loadparm, LOADPARM_LEN);
	loadparm[LOADPARM_LEN] = 0;
	strstrip(loadparm);
}

static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
				       struct kobj_attribute *attr, char *page)
{
	char buf[LOADPARM_LEN + 1];

	reipl_get_ascii_loadparm(buf);
	return sprintf(page, "%s\n", buf);
}

static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
					struct kobj_attribute *attr,
					const char *buf, size_t len)
{
	int i, lp_len;

	/* ignore trailing newline */
	lp_len = len;
	if ((len > 0) && (buf[len - 1] == '\n'))
		lp_len--;
	/* loadparm can have max 8 characters and must not start with a blank */
	if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
		return -EINVAL;
	/* loadparm can only contain "a-z,A-Z,0-9,SP,." */
	for (i = 0; i < lp_len; i++) {
		if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
		    (buf[i] == '.'))
			continue;
		return -EINVAL;
	}
	/* initialize loadparm with blanks */
	memset(&reipl_block_ccw->ipl_info.ccw.load_param, ' ', LOADPARM_LEN);
	/* copy and convert to ebcdic */
	memcpy(&reipl_block_ccw->ipl_info.ccw.load_param, buf, lp_len);
	ASCEBC(reipl_block_ccw->ipl_info.ccw.load_param, LOADPARM_LEN);
	return len;
}

static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
	__ATTR(loadparm, 0644, reipl_ccw_loadparm_show,
	       reipl_ccw_loadparm_store);

static struct attribute *reipl_ccw_attrs[] = {
	&sys_reipl_ccw_device_attr.attr,
	&sys_reipl_ccw_loadparm_attr.attr,
	NULL,
};

static struct attribute_group reipl_ccw_attr_group = {
	.name  = IPL_CCW_STR,
	.attrs = reipl_ccw_attrs,
};


/* NSS reipl device attributes */

DEFINE_IPL_ATTR_STR_RW(reipl_nss, name, "%s\n", "%s\n", reipl_nss_name);

static struct attribute *reipl_nss_attrs[] = {
	&sys_reipl_nss_name_attr.attr,
	NULL,
};

static struct attribute_group reipl_nss_attr_group = {
	.name  = IPL_NSS_STR,
	.attrs = reipl_nss_attrs,
};

/* reipl type */

static int reipl_set_type(enum ipl_type type)
{
	if (!(reipl_capabilities & type))
		return -EINVAL;

	switch(type) {
	case IPL_TYPE_CCW:
		if (MACHINE_IS_VM)
			reipl_method = REIPL_METHOD_CCW_VM;
		else
			reipl_method = REIPL_METHOD_CCW_CIO;
		break;
	case IPL_TYPE_FCP:
		if (diag308_set_works)
			reipl_method = REIPL_METHOD_FCP_RW_DIAG;
		else if (MACHINE_IS_VM)
			reipl_method = REIPL_METHOD_FCP_RO_VM;
		else
			reipl_method = REIPL_METHOD_FCP_RO_DIAG;
		break;
	case IPL_TYPE_FCP_DUMP:
		reipl_method = REIPL_METHOD_FCP_DUMP;
		break;
	case IPL_TYPE_NSS:
		reipl_method = REIPL_METHOD_NSS;
		break;
	case IPL_TYPE_UNKNOWN:
		reipl_method = REIPL_METHOD_DEFAULT;
		break;
	default:
		BUG();
	}
	reipl_type = type;
	return 0;
}

static ssize_t reipl_type_show(struct kobject *kobj,
			       struct kobj_attribute *attr, char *page)
{
	return sprintf(page, "%s\n", ipl_type_str(reipl_type));
}

static ssize_t reipl_type_store(struct kobject *kobj,
				struct kobj_attribute *attr,
				const char *buf, size_t len)
{
	int rc = -EINVAL;

	if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
		rc = reipl_set_type(IPL_TYPE_CCW);
	else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
		rc = reipl_set_type(IPL_TYPE_FCP);
	else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
		rc = reipl_set_type(IPL_TYPE_NSS);
	return (rc != 0) ? rc : len;
}

static struct kobj_attribute reipl_type_attr =
	__ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);

static struct kset *reipl_kset;

void reipl_run(struct shutdown_trigger *trigger)
{
	struct ccw_dev_id devid;
	static char buf[100];
	char loadparm[LOADPARM_LEN + 1];

	switch (reipl_method) {
	case REIPL_METHOD_CCW_CIO:
		devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
		if (ipl_info.type == IPL_TYPE_CCW && devid.devno == ipl_devno)
			diag308(DIAG308_IPL, NULL);
		devid.ssid  = 0;
		reipl_ccw_dev(&devid);
		break;
	case REIPL_METHOD_CCW_VM:
		reipl_get_ascii_loadparm(loadparm);
		if (strlen(loadparm) == 0)
			sprintf(buf, "IPL %X CLEAR",
				reipl_block_ccw->ipl_info.ccw.devno);
		else
			sprintf(buf, "IPL %X CLEAR LOADPARM '%s'",
				reipl_block_ccw->ipl_info.ccw.devno, loadparm);
		__cpcmd(buf, NULL, 0, NULL);
		break;
	case REIPL_METHOD_CCW_DIAG:
		diag308(DIAG308_SET, reipl_block_ccw);
		diag308(DIAG308_IPL, NULL);
		break;
	case REIPL_METHOD_FCP_RW_DIAG:
		diag308(DIAG308_SET, reipl_block_fcp);
		diag308(DIAG308_IPL, NULL);
		break;
	case REIPL_METHOD_FCP_RO_DIAG:
		diag308(DIAG308_IPL, NULL);
		break;
	case REIPL_METHOD_FCP_RO_VM:
		__cpcmd("IPL", NULL, 0, NULL);
		break;
	case REIPL_METHOD_NSS:
		sprintf(buf, "IPL %s", reipl_nss_name);
		__cpcmd(buf, NULL, 0, NULL);
		break;
	case REIPL_METHOD_DEFAULT:
		if (MACHINE_IS_VM)
			__cpcmd("IPL", NULL, 0, NULL);
		diag308(DIAG308_IPL, NULL);
		break;
	case REIPL_METHOD_FCP_DUMP:
	default:
		break;
	}
}

static void __init reipl_probe(void)
{
	void *buffer;

	buffer = (void *) get_zeroed_page(GFP_KERNEL);
	if (!buffer)
		return;
	if (diag308(DIAG308_STORE, buffer) == DIAG308_RC_OK)
		diag308_set_works = 1;
	free_page((unsigned long)buffer);
}

static int __init reipl_nss_init(void)
{
	int rc;

	if (!MACHINE_IS_VM)
		return 0;
	rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
	if (rc)
		return rc;
	strncpy(reipl_nss_name, kernel_nss_name, NSS_NAME_SIZE + 1);
	reipl_capabilities |= IPL_TYPE_NSS;
	return 0;
}

static int __init reipl_ccw_init(void)
{
	int rc;

	reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
	if (!reipl_block_ccw)
		return -ENOMEM;
	rc = sysfs_create_group(&reipl_kset->kobj, &reipl_ccw_attr_group);
	if (rc) {
		free_page((unsigned long)reipl_block_ccw);
		return rc;
	}
	reipl_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
	reipl_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
	reipl_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
	reipl_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
	/* check if read scp info worked and set loadparm */
	if (sclp_ipl_info.is_valid)
		memcpy(reipl_block_ccw->ipl_info.ccw.load_param,
		       &sclp_ipl_info.loadparm, LOADPARM_LEN);
	else
		/* read scp info failed: set empty loadparm (EBCDIC blanks) */
		memset(reipl_block_ccw->ipl_info.ccw.load_param, 0x40,
		       LOADPARM_LEN);
	/* FIXME: check for diag308_set_works when enabling diag ccw reipl */
	if (!MACHINE_IS_VM)
		sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
	if (ipl_info.type == IPL_TYPE_CCW)
		reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
	reipl_capabilities |= IPL_TYPE_CCW;
	return 0;
}

static int __init reipl_fcp_init(void)
{
	int rc;

	if ((!diag308_set_works) && (ipl_info.type != IPL_TYPE_FCP))
		return 0;
	if ((!diag308_set_works) && (ipl_info.type == IPL_TYPE_FCP))
		make_attrs_ro(reipl_fcp_attrs);

	reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
	if (!reipl_block_fcp)
		return -ENOMEM;
	rc = sysfs_create_group(&reipl_kset->kobj, &reipl_fcp_attr_group);
	if (rc) {
		free_page((unsigned long)reipl_block_fcp);
		return rc;
	}
	if (ipl_info.type == IPL_TYPE_FCP) {
		memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
	} else {
		reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
		reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
		reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
		reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
		reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
	}
	reipl_capabilities |= IPL_TYPE_FCP;
	return 0;
}

static int reipl_init(void)
{
	int rc;

	reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
	if (!reipl_kset)
		return -ENOMEM;
	rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
	if (rc) {
		kset_unregister(reipl_kset);
		return rc;
	}
	rc = reipl_ccw_init();
	if (rc)
		return rc;
	rc = reipl_fcp_init();
	if (rc)
		return rc;
	rc = reipl_nss_init();
	if (rc)
		return rc;
	rc = reipl_set_type(ipl_info.type);
	if (rc)
		return rc;
	return 0;
}

static struct shutdown_action reipl_action = {SHUTDOWN_ACTION_REIPL_STR,
					      reipl_run, reipl_init};

/*
 * dump shutdown action: Dump Linux on shutdown.
 */

/* FCP dump device attributes */

DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n",
		   dump_block_fcp->ipl_info.fcp.wwpn);
DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n",
		   dump_block_fcp->ipl_info.fcp.lun);
DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
		   dump_block_fcp->ipl_info.fcp.bootprog);
DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
		   dump_block_fcp->ipl_info.fcp.br_lba);
DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
		   dump_block_fcp->ipl_info.fcp.devno);

static struct attribute *dump_fcp_attrs[] = {
	&sys_dump_fcp_device_attr.attr,
	&sys_dump_fcp_wwpn_attr.attr,
	&sys_dump_fcp_lun_attr.attr,
	&sys_dump_fcp_bootprog_attr.attr,
	&sys_dump_fcp_br_lba_attr.attr,
	NULL,
};

static struct attribute_group dump_fcp_attr_group = {
	.name  = IPL_FCP_STR,
	.attrs = dump_fcp_attrs,
};

/* CCW dump device attributes */

DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
		   dump_block_ccw->ipl_info.ccw.devno);

static struct attribute *dump_ccw_attrs[] = {
	&sys_dump_ccw_device_attr.attr,
	NULL,
};

static struct attribute_group dump_ccw_attr_group = {
	.name  = IPL_CCW_STR,
	.attrs = dump_ccw_attrs,
};

/* dump type */

static int dump_set_type(enum dump_type type)
{
	if (!(dump_capabilities & type))
		return -EINVAL;
	switch (type) {
	case DUMP_TYPE_CCW:
		if (MACHINE_IS_VM)
			dump_method = DUMP_METHOD_CCW_VM;
		else
			dump_method = DUMP_METHOD_CCW_CIO;
		break;
	case DUMP_TYPE_FCP:
		dump_method = DUMP_METHOD_FCP_DIAG;
		break;
	default:
		dump_method = DUMP_METHOD_NONE;
	}
	dump_type = type;
	return 0;
}

static ssize_t dump_type_show(struct kobject *kobj,
			      struct kobj_attribute *attr, char *page)
{
	return sprintf(page, "%s\n", dump_type_str(dump_type));
}

static ssize_t dump_type_store(struct kobject *kobj,
			       struct kobj_attribute *attr,
			       const char *buf, size_t len)
{
	int rc = -EINVAL;

	if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
		rc = dump_set_type(DUMP_TYPE_NONE);
	else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
		rc = dump_set_type(DUMP_TYPE_CCW);
	else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
		rc = dump_set_type(DUMP_TYPE_FCP);
	return (rc != 0) ? rc : len;
}

static struct kobj_attribute dump_type_attr =
	__ATTR(dump_type, 0644, dump_type_show, dump_type_store);

static struct kset *dump_kset;

static void dump_run(struct shutdown_trigger *trigger)
{
	struct ccw_dev_id devid;
	static char buf[100];

	switch (dump_method) {
	case DUMP_METHOD_CCW_CIO:
		smp_send_stop();
		devid.devno = dump_block_ccw->ipl_info.ccw.devno;
		devid.ssid  = 0;
		reipl_ccw_dev(&devid);
		break;
	case DUMP_METHOD_CCW_VM:
		smp_send_stop();
		sprintf(buf, "STORE STATUS");
		__cpcmd(buf, NULL, 0, NULL);
		sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
		__cpcmd(buf, NULL, 0, NULL);
		break;
	case DUMP_METHOD_CCW_DIAG:
		diag308(DIAG308_SET, dump_block_ccw);
		diag308(DIAG308_DUMP, NULL);
		break;
	case DUMP_METHOD_FCP_DIAG:
		diag308(DIAG308_SET, dump_block_fcp);
		diag308(DIAG308_DUMP, NULL);
		break;
	case DUMP_METHOD_NONE:
	default:
		return;
	}
	printk(KERN_EMERG "Dump failed!\n");
}

static int __init dump_ccw_init(void)
{
	int rc;

	dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
	if (!dump_block_ccw)
		return -ENOMEM;
	rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
	if (rc) {
		free_page((unsigned long)dump_block_ccw);
		return rc;
	}
	dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
	dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
	dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
	dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
	dump_capabilities |= DUMP_TYPE_CCW;
	return 0;
}

static int __init dump_fcp_init(void)
{
	int rc;

	if (!sclp_ipl_info.has_dump)
		return 0; /* LDIPL DUMP is not installed */
	if (!diag308_set_works)
		return 0;
	dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
	if (!dump_block_fcp)
		return -ENOMEM;
	rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
	if (rc) {
		free_page((unsigned long)dump_block_fcp);
		return rc;
	}
	dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
	dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
	dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
	dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
	dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
	dump_capabilities |= DUMP_TYPE_FCP;
	return 0;
}

static int dump_init(void)
{
	int rc;

	dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
	if (!dump_kset)
		return -ENOMEM;
	rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
	if (rc) {
		kset_unregister(dump_kset);
		return rc;
	}
	rc = dump_ccw_init();
	if (rc)
		return rc;
	rc = dump_fcp_init();
	if (rc)
		return rc;
	dump_set_type(DUMP_TYPE_NONE);
	return 0;
}

static struct shutdown_action dump_action = {SHUTDOWN_ACTION_DUMP_STR,
					     dump_run, dump_init};

/*
 * vmcmd shutdown action: Trigger vm command on shutdown.
 */

static char vmcmd_on_reboot[128];
static char vmcmd_on_panic[128];
static char vmcmd_on_halt[128];
static char vmcmd_on_poff[128];

DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);

static struct attribute *vmcmd_attrs[] = {
	&sys_vmcmd_on_reboot_attr.attr,
	&sys_vmcmd_on_panic_attr.attr,
	&sys_vmcmd_on_halt_attr.attr,
	&sys_vmcmd_on_poff_attr.attr,
	NULL,
};

static struct attribute_group vmcmd_attr_group = {
	.attrs = vmcmd_attrs,
};

static struct kset *vmcmd_kset;

static void vmcmd_run(struct shutdown_trigger *trigger)
{
	char *cmd, *next_cmd;

	if (strcmp(trigger->name, ON_REIPL_STR) == 0)
		cmd = vmcmd_on_reboot;
	else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
		cmd = vmcmd_on_panic;
	else if (strcmp(trigger->name, ON_HALT_STR) == 0)
		cmd = vmcmd_on_halt;
	else if (strcmp(trigger->name, ON_POFF_STR) == 0)
		cmd = vmcmd_on_poff;
	else
		return;

	if (strlen(cmd) == 0)
		return;
	do {
		next_cmd = strchr(cmd, '\n');
		if (next_cmd) {
			next_cmd[0] = 0;
			next_cmd += 1;
		}
		__cpcmd(cmd, NULL, 0, NULL);
		cmd = next_cmd;
	} while (cmd != NULL);
}

static int vmcmd_init(void)
{
	if (!MACHINE_IS_VM)
		return -ENOTSUPP;
	vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
	if (!vmcmd_kset)
		return -ENOMEM;
	return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
}

static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
					      vmcmd_run, vmcmd_init};

/*
 * stop shutdown action: Stop Linux on shutdown.
 */

static void stop_run(struct shutdown_trigger *trigger)
{
	if (strcmp(trigger->name, ON_PANIC_STR) == 0)
		disabled_wait((unsigned long) __builtin_return_address(0));
	else {
		signal_processor(smp_processor_id(), sigp_stop);
		for (;;);
	}
}

static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
					     stop_run, NULL};

/* action list */

static struct shutdown_action *shutdown_actions_list[] = {
	&ipl_action, &reipl_action, &dump_action, &vmcmd_action, &stop_action};
#define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))

/*
 * Trigger section
 */

static struct kset *shutdown_actions_kset;

static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
		       size_t len)
{
	int i;
	for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
		if (!shutdown_actions_list[i])
			continue;
		if (strncmp(buf, shutdown_actions_list[i]->name,
			    strlen(shutdown_actions_list[i]->name)) == 0) {
			trigger->action = shutdown_actions_list[i];
			return len;
		}
	}
	return -EINVAL;
}

/* on reipl */

static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
						    &reipl_action};

static ssize_t on_reboot_show(struct kobject *kobj,
			      struct kobj_attribute *attr, char *page)
{
	return sprintf(page, "%s\n", on_reboot_trigger.action->name);
}

static ssize_t on_reboot_store(struct kobject *kobj,
			       struct kobj_attribute *attr,
			       const char *buf, size_t len)
{
	return set_trigger(buf, &on_reboot_trigger, len);
}

static struct kobj_attribute on_reboot_attr =
	__ATTR(on_reboot, 0644, on_reboot_show, on_reboot_store);

static void do_machine_restart(char *__unused)
{
	smp_send_stop();
	on_reboot_trigger.action->fn(&on_reboot_trigger);
	reipl_run(NULL);
}
void (*_machine_restart)(char *command) = do_machine_restart;

/* on panic */

static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};

static ssize_t on_panic_show(struct kobject *kobj,
			     struct kobj_attribute *attr, char *page)
{
	return sprintf(page, "%s\n", on_panic_trigger.action->name);
}

static ssize_t on_panic_store(struct kobject *kobj,
			      struct kobj_attribute *attr,
			      const char *buf, size_t len)
{
	return set_trigger(buf, &on_panic_trigger, len);
}

static struct kobj_attribute on_panic_attr =
	__ATTR(on_panic, 0644, on_panic_show, on_panic_store);

static void do_panic(void)
{
	on_panic_trigger.action->fn(&on_panic_trigger);
	stop_run(&on_panic_trigger);
}

/* on halt */

static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};

static ssize_t on_halt_show(struct kobject *kobj,
			    struct kobj_attribute *attr, char *page)
{
	return sprintf(page, "%s\n", on_halt_trigger.action->name);
}

static ssize_t on_halt_store(struct kobject *kobj,
			     struct kobj_attribute *attr,
			     const char *buf, size_t len)
{
	return set_trigger(buf, &on_halt_trigger, len);
}

static struct kobj_attribute on_halt_attr =
	__ATTR(on_halt, 0644, on_halt_show, on_halt_store);


static void do_machine_halt(void)
{
	smp_send_stop();
	on_halt_trigger.action->fn(&on_halt_trigger);
	stop_run(&on_halt_trigger);
}
void (*_machine_halt)(void) = do_machine_halt;

/* on power off */

static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};

static ssize_t on_poff_show(struct kobject *kobj,
			    struct kobj_attribute *attr, char *page)
{
	return sprintf(page, "%s\n", on_poff_trigger.action->name);
}

static ssize_t on_poff_store(struct kobject *kobj,
			     struct kobj_attribute *attr,
			     const char *buf, size_t len)
{
	return set_trigger(buf, &on_poff_trigger, len);
}

static struct kobj_attribute on_poff_attr =
	__ATTR(on_poff, 0644, on_poff_show, on_poff_store);


static void do_machine_power_off(void)
{
	smp_send_stop();
	on_poff_trigger.action->fn(&on_poff_trigger);
	stop_run(&on_poff_trigger);
}
void (*_machine_power_off)(void) = do_machine_power_off;

static void __init shutdown_triggers_init(void)
{
	shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
						    firmware_kobj);
	if (!shutdown_actions_kset)
		goto fail;
	if (sysfs_create_file(&shutdown_actions_kset->kobj,
			      &on_reboot_attr.attr))
		goto fail;
	if (sysfs_create_file(&shutdown_actions_kset->kobj,
			      &on_panic_attr.attr))
		goto fail;
	if (sysfs_create_file(&shutdown_actions_kset->kobj,
			      &on_halt_attr.attr))
		goto fail;
	if (sysfs_create_file(&shutdown_actions_kset->kobj,
			      &on_poff_attr.attr))
		goto fail;

	return;
fail:
	panic("shutdown_triggers_init failed\n");
}

static void __init shutdown_actions_init(void)
{
	int i;

	for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
		if (!shutdown_actions_list[i]->init)
			continue;
		if (shutdown_actions_list[i]->init())
			shutdown_actions_list[i] = NULL;
	}
}

static int __init s390_ipl_init(void)
{
	reipl_probe();
	sclp_get_ipl_info(&sclp_ipl_info);
	shutdown_actions_init();
	shutdown_triggers_init();
	return 0;
}

__initcall(s390_ipl_init);

static void __init strncpy_skip_quote(char *dst, char *src, int n)
{
	int sx, dx;

	dx = 0;
	for (sx = 0; src[sx] != 0; sx++) {
		if (src[sx] == '"')
			continue;
		dst[dx++] = src[sx];
		if (dx >= n)
			break;
	}
}

static int __init vmcmd_on_reboot_setup(char *str)
{
	if (!MACHINE_IS_VM)
		return 1;
	strncpy_skip_quote(vmcmd_on_reboot, str, 127);
	vmcmd_on_reboot[127] = 0;
	on_reboot_trigger.action = &vmcmd_action;
	return 1;
}
__setup("vmreboot=", vmcmd_on_reboot_setup);

static int __init vmcmd_on_panic_setup(char *str)
{
	if (!MACHINE_IS_VM)
		return 1;
	strncpy_skip_quote(vmcmd_on_panic, str, 127);
	vmcmd_on_panic[127] = 0;
	on_panic_trigger.action = &vmcmd_action;
	return 1;
}
__setup("vmpanic=", vmcmd_on_panic_setup);

static int __init vmcmd_on_halt_setup(char *str)
{
	if (!MACHINE_IS_VM)
		return 1;
	strncpy_skip_quote(vmcmd_on_halt, str, 127);
	vmcmd_on_halt[127] = 0;
	on_halt_trigger.action = &vmcmd_action;
	return 1;
}
__setup("vmhalt=", vmcmd_on_halt_setup);

static int __init vmcmd_on_poff_setup(char *str)
{
	if (!MACHINE_IS_VM)
		return 1;
	strncpy_skip_quote(vmcmd_on_poff, str, 127);
	vmcmd_on_poff[127] = 0;
	on_poff_trigger.action = &vmcmd_action;
	return 1;
}
__setup("vmpoff=", vmcmd_on_poff_setup);

static int on_panic_notify(struct notifier_block *self,
			   unsigned long event, void *data)
{
	do_panic();
	return NOTIFY_OK;
}

static struct notifier_block on_panic_nb = {
	.notifier_call = on_panic_notify,
	.priority = 0,
};

void __init setup_ipl(void)
{
	ipl_info.type = get_ipl_type();
	switch (ipl_info.type) {
	case IPL_TYPE_CCW:
		ipl_info.data.ccw.dev_id.devno = ipl_devno;
		ipl_info.data.ccw.dev_id.ssid = 0;
		break;
	case IPL_TYPE_FCP:
	case IPL_TYPE_FCP_DUMP:
		ipl_info.data.fcp.dev_id.devno =
			IPL_PARMBLOCK_START->ipl_info.fcp.devno;
		ipl_info.data.fcp.dev_id.ssid = 0;
		ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
		ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
		break;
	case IPL_TYPE_NSS:
		strncpy(ipl_info.data.nss.name, kernel_nss_name,
			sizeof(ipl_info.data.nss.name));
		break;
	case IPL_TYPE_UNKNOWN:
	default:
		/* We have no info to copy */
		break;
	}
	atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
}

void __init ipl_save_parameters(void)
{
	struct cio_iplinfo iplinfo;
	unsigned int *ipl_ptr;
	void *src, *dst;

	if (cio_get_iplinfo(&iplinfo))
		return;

	ipl_devno = iplinfo.devno;
	ipl_flags |= IPL_DEVNO_VALID;
	if (!iplinfo.is_qdio)
		return;
	ipl_flags |= IPL_PARMBLOCK_VALID;
	ipl_ptr = (unsigned int *)__LC_IPL_PARMBLOCK_PTR;
	src = (void *)(unsigned long)*ipl_ptr;
	dst = (void *)IPL_PARMBLOCK_ORIGIN;
	memmove(dst, src, PAGE_SIZE);
	*ipl_ptr = IPL_PARMBLOCK_ORIGIN;
}

static LIST_HEAD(rcall);
static DEFINE_MUTEX(rcall_mutex);

void register_reset_call(struct reset_call *reset)
{
	mutex_lock(&rcall_mutex);
	list_add(&reset->list, &rcall);
	mutex_unlock(&rcall_mutex);
}
EXPORT_SYMBOL_GPL(register_reset_call);

void unregister_reset_call(struct reset_call *reset)
{
	mutex_lock(&rcall_mutex);
	list_del(&reset->list);
	mutex_unlock(&rcall_mutex);
}
EXPORT_SYMBOL_GPL(unregister_reset_call);

static void do_reset_calls(void)
{
	struct reset_call *reset;

	list_for_each_entry(reset, &rcall, list)
		reset->fn();
}

u32 dump_prefix_page;

void s390_reset_system(void)
{
	struct _lowcore *lc;

	lc = (struct _lowcore *)(unsigned long) store_prefix();

	/* Stack for interrupt/machine check handler */
	lc->panic_stack = S390_lowcore.panic_stack;

	/* Save prefix page address for dump case */
	dump_prefix_page = (u32)(unsigned long) lc;

	/* Disable prefixing */
	set_prefix(0);

	/* Disable lowcore protection */
	__ctl_clear_bit(0,28);

	/* Set new machine check handler */
	S390_lowcore.mcck_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
	S390_lowcore.mcck_new_psw.addr =
		PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;

	/* Set new program check handler */
	S390_lowcore.program_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
	S390_lowcore.program_new_psw.addr =
		PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;

	do_reset_calls();
}