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of: MSI: Simplify irqdomain lookup
[linux/fpc-iii.git] / arch / s390 / kernel / ipl.c
blobb1f0a90f933bbc95cc04c9e028d87865555909a9
1 /*
2 * ipl/reipl/dump support for Linux on s390.
3 *
4 * Copyright IBM Corp. 2005, 2012
5 * Author(s): Michael Holzheu <holzheu@de.ibm.com>
6 * Heiko Carstens <heiko.carstens@de.ibm.com>
7 * Volker Sameske <sameske@de.ibm.com>
8 */
9
10 #include <linux/types.h>
11 #include <linux/module.h>
12 #include <linux/device.h>
13 #include <linux/delay.h>
14 #include <linux/reboot.h>
15 #include <linux/ctype.h>
16 #include <linux/fs.h>
17 #include <linux/gfp.h>
18 #include <linux/crash_dump.h>
19 #include <linux/debug_locks.h>
20 #include <asm/diag.h>
21 #include <asm/ipl.h>
22 #include <asm/smp.h>
23 #include <asm/setup.h>
24 #include <asm/cpcmd.h>
25 #include <asm/cio.h>
26 #include <asm/ebcdic.h>
27 #include <asm/reset.h>
28 #include <asm/sclp.h>
29 #include <asm/checksum.h>
30 #include <asm/debug.h>
31 #include <asm/os_info.h>
32 #include "entry.h"
33
34 #define IPL_PARM_BLOCK_VERSION 0
35
36 #define IPL_UNKNOWN_STR "unknown"
37 #define IPL_CCW_STR "ccw"
38 #define IPL_FCP_STR "fcp"
39 #define IPL_FCP_DUMP_STR "fcp_dump"
40 #define IPL_NSS_STR "nss"
41
42 #define DUMP_CCW_STR "ccw"
43 #define DUMP_FCP_STR "fcp"
44 #define DUMP_NONE_STR "none"
45
46 /*
47 * Four shutdown trigger types are supported:
48 * - panic
49 * - halt
50 * - power off
51 * - reipl
52 * - restart
53 */
54 #define ON_PANIC_STR "on_panic"
55 #define ON_HALT_STR "on_halt"
56 #define ON_POFF_STR "on_poff"
57 #define ON_REIPL_STR "on_reboot"
58 #define ON_RESTART_STR "on_restart"
59
60 struct shutdown_action;
61 struct shutdown_trigger {
62 char *name;
63 struct shutdown_action *action;
64 };
65
66 /*
67 * The following shutdown action types are supported:
68 */
69 #define SHUTDOWN_ACTION_IPL_STR "ipl"
70 #define SHUTDOWN_ACTION_REIPL_STR "reipl"
71 #define SHUTDOWN_ACTION_DUMP_STR "dump"
72 #define SHUTDOWN_ACTION_VMCMD_STR "vmcmd"
73 #define SHUTDOWN_ACTION_STOP_STR "stop"
74 #define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl"
75
76 struct shutdown_action {
77 char *name;
78 void (*fn) (struct shutdown_trigger *trigger);
79 int (*init) (void);
80 int init_rc;
81 };
82
83 static char *ipl_type_str(enum ipl_type type)
84 {
85 switch (type) {
86 case IPL_TYPE_CCW:
87 return IPL_CCW_STR;
88 case IPL_TYPE_FCP:
89 return IPL_FCP_STR;
90 case IPL_TYPE_FCP_DUMP:
91 return IPL_FCP_DUMP_STR;
92 case IPL_TYPE_NSS:
93 return IPL_NSS_STR;
94 case IPL_TYPE_UNKNOWN:
95 default:
96 return IPL_UNKNOWN_STR;
97 }
98 }
99
100 enum dump_type {
101 DUMP_TYPE_NONE = 1,
102 DUMP_TYPE_CCW = 2,
103 DUMP_TYPE_FCP = 4,
104 };
105
106 static char *dump_type_str(enum dump_type type)
107 {
108 switch (type) {
109 case DUMP_TYPE_NONE:
110 return DUMP_NONE_STR;
111 case DUMP_TYPE_CCW:
112 return DUMP_CCW_STR;
113 case DUMP_TYPE_FCP:
114 return DUMP_FCP_STR;
115 default:
116 return NULL;
117 }
118 }
119
120 /*
121 * Must be in data section since the bss section
122 * is not cleared when these are accessed.
123 */
124 static u8 ipl_ssid __attribute__((__section__(".data"))) = 0;
125 static u16 ipl_devno __attribute__((__section__(".data"))) = 0;
126 u32 ipl_flags __attribute__((__section__(".data"))) = 0;
127
128 enum ipl_method {
129 REIPL_METHOD_CCW_CIO,
130 REIPL_METHOD_CCW_DIAG,
131 REIPL_METHOD_CCW_VM,
132 REIPL_METHOD_FCP_RO_DIAG,
133 REIPL_METHOD_FCP_RW_DIAG,
134 REIPL_METHOD_FCP_RO_VM,
135 REIPL_METHOD_FCP_DUMP,
136 REIPL_METHOD_NSS,
137 REIPL_METHOD_NSS_DIAG,
138 REIPL_METHOD_DEFAULT,
139 };
140
141 enum dump_method {
142 DUMP_METHOD_NONE,
143 DUMP_METHOD_CCW_CIO,
144 DUMP_METHOD_CCW_DIAG,
145 DUMP_METHOD_CCW_VM,
146 DUMP_METHOD_FCP_DIAG,
147 };
148
149 static int diag308_set_works = 0;
150
151 static struct ipl_parameter_block ipl_block;
152
153 static int reipl_capabilities = IPL_TYPE_UNKNOWN;
154
155 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
156 static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
157 static struct ipl_parameter_block *reipl_block_fcp;
158 static struct ipl_parameter_block *reipl_block_ccw;
159 static struct ipl_parameter_block *reipl_block_nss;
160 static struct ipl_parameter_block *reipl_block_actual;
161
162 static int dump_capabilities = DUMP_TYPE_NONE;
163 static enum dump_type dump_type = DUMP_TYPE_NONE;
164 static enum dump_method dump_method = DUMP_METHOD_NONE;
165 static struct ipl_parameter_block *dump_block_fcp;
166 static struct ipl_parameter_block *dump_block_ccw;
167
168 static struct sclp_ipl_info sclp_ipl_info;
169
170 static inline int __diag308(unsigned long subcode, void *addr)
171 {
172 register unsigned long _addr asm("0") = (unsigned long) addr;
173 register unsigned long _rc asm("1") = 0;
174
175 asm volatile(
176 " diag %0,%2,0x308\n"
177 "0:\n"
178 EX_TABLE(0b,0b)
179 : "+d" (_addr), "+d" (_rc)
180 : "d" (subcode) : "cc", "memory");
181 return _rc;
182 }
183
184 int diag308(unsigned long subcode, void *addr)
185 {
186 diag_stat_inc(DIAG_STAT_X308);
187 return __diag308(subcode, addr);
188 }
189 EXPORT_SYMBOL_GPL(diag308);
190
191 /* SYSFS */
192
193 #define IPL_ATTR_SHOW_FN(_prefix, _name, _format, args...) \
194 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
195 struct kobj_attribute *attr, \
196 char *page) \
197 { \
198 return snprintf(page, PAGE_SIZE, _format, ##args); \
199 }
200
201 #define IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk) \
202 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
203 struct kobj_attribute *attr, \
204 const char *buf, size_t len) \
205 { \
206 unsigned long long ssid, devno; \
207 \
208 if (sscanf(buf, "0.%llx.%llx\n", &ssid, &devno) != 2) \
209 return -EINVAL; \
210 \
211 if (ssid > __MAX_SSID || devno > __MAX_SUBCHANNEL) \
212 return -EINVAL; \
213 \
214 _ipl_blk.ssid = ssid; \
215 _ipl_blk.devno = devno; \
216 return len; \
217 }
218
219 #define DEFINE_IPL_CCW_ATTR_RW(_prefix, _name, _ipl_blk) \
220 IPL_ATTR_SHOW_FN(_prefix, _name, "0.%x.%04x\n", \
221 _ipl_blk.ssid, _ipl_blk.devno); \
222 IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk); \
223 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
224 __ATTR(_name, (S_IRUGO | S_IWUSR), \
225 sys_##_prefix##_##_name##_show, \
226 sys_##_prefix##_##_name##_store) \
227
228 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
229 IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value) \
230 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
231 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL)
232
233 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
234 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value) \
235 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
236 struct kobj_attribute *attr, \
237 const char *buf, size_t len) \
238 { \
239 unsigned long long value; \
240 if (sscanf(buf, _fmt_in, &value) != 1) \
241 return -EINVAL; \
242 _value = value; \
243 return len; \
244 } \
245 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
246 __ATTR(_name,(S_IRUGO | S_IWUSR), \
247 sys_##_prefix##_##_name##_show, \
248 sys_##_prefix##_##_name##_store)
249
250 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
251 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, _value) \
252 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
253 struct kobj_attribute *attr, \
254 const char *buf, size_t len) \
255 { \
256 strncpy(_value, buf, sizeof(_value) - 1); \
257 strim(_value); \
258 return len; \
259 } \
260 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
261 __ATTR(_name,(S_IRUGO | S_IWUSR), \
262 sys_##_prefix##_##_name##_show, \
263 sys_##_prefix##_##_name##_store)
264
265 static void make_attrs_ro(struct attribute **attrs)
266 {
267 while (*attrs) {
268 (*attrs)->mode = S_IRUGO;
269 attrs++;
270 }
271 }
272
273 /*
274 * ipl section
275 */
276
277 static __init enum ipl_type get_ipl_type(void)
278 {
279 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
280
281 if (ipl_flags & IPL_NSS_VALID)
282 return IPL_TYPE_NSS;
283 if (!(ipl_flags & IPL_DEVNO_VALID))
284 return IPL_TYPE_UNKNOWN;
285 if (!(ipl_flags & IPL_PARMBLOCK_VALID))
286 return IPL_TYPE_CCW;
287 if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
288 return IPL_TYPE_UNKNOWN;
289 if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
290 return IPL_TYPE_UNKNOWN;
291 if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
292 return IPL_TYPE_FCP_DUMP;
293 return IPL_TYPE_FCP;
294 }
295
296 struct ipl_info ipl_info;
297 EXPORT_SYMBOL_GPL(ipl_info);
298
299 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
300 char *page)
301 {
302 return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
303 }
304
305 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
306
307 /* VM IPL PARM routines */
308 static size_t reipl_get_ascii_vmparm(char *dest, size_t size,
309 const struct ipl_parameter_block *ipb)
310 {
311 int i;
312 size_t len;
313 char has_lowercase = 0;
314
315 len = 0;
316 if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
317 (ipb->ipl_info.ccw.vm_parm_len > 0)) {
318
319 len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
320 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
321 /* If at least one character is lowercase, we assume mixed
322 * case; otherwise we convert everything to lowercase.
323 */
324 for (i = 0; i < len; i++)
325 if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
326 (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
327 (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
328 has_lowercase = 1;
329 break;
330 }
331 if (!has_lowercase)
332 EBC_TOLOWER(dest, len);
333 EBCASC(dest, len);
334 }
335 dest[len] = 0;
336
337 return len;
338 }
339
340 size_t append_ipl_vmparm(char *dest, size_t size)
341 {
342 size_t rc;
343
344 rc = 0;
345 if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
346 rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
347 else
348 dest[0] = 0;
349 return rc;
350 }
351
352 static ssize_t ipl_vm_parm_show(struct kobject *kobj,
353 struct kobj_attribute *attr, char *page)
354 {
355 char parm[DIAG308_VMPARM_SIZE + 1] = {};
356
357 append_ipl_vmparm(parm, sizeof(parm));
358 return sprintf(page, "%s\n", parm);
359 }
360
361 static size_t scpdata_length(const char* buf, size_t count)
362 {
363 while (count) {
364 if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
365 break;
366 count--;
367 }
368 return count;
369 }
370
371 static size_t reipl_append_ascii_scpdata(char *dest, size_t size,
372 const struct ipl_parameter_block *ipb)
373 {
374 size_t count;
375 size_t i;
376 int has_lowercase;
377
378 count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data,
379 ipb->ipl_info.fcp.scp_data_len));
380 if (!count)
381 goto out;
382
383 has_lowercase = 0;
384 for (i = 0; i < count; i++) {
385 if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
386 count = 0;
387 goto out;
388 }
389 if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
390 has_lowercase = 1;
391 }
392
393 if (has_lowercase)
394 memcpy(dest, ipb->ipl_info.fcp.scp_data, count);
395 else
396 for (i = 0; i < count; i++)
397 dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]);
398 out:
399 dest[count] = '\0';
400 return count;
401 }
402
403 size_t append_ipl_scpdata(char *dest, size_t len)
404 {
405 size_t rc;
406
407 rc = 0;
408 if (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP)
409 rc = reipl_append_ascii_scpdata(dest, len, &ipl_block);
410 else
411 dest[0] = 0;
412 return rc;
413 }
414
415
416 static struct kobj_attribute sys_ipl_vm_parm_attr =
417 __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
418
419 static ssize_t sys_ipl_device_show(struct kobject *kobj,
420 struct kobj_attribute *attr, char *page)
421 {
422 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
423
424 switch (ipl_info.type) {
425 case IPL_TYPE_CCW:
426 return sprintf(page, "0.%x.%04x\n", ipl_ssid, ipl_devno);
427 case IPL_TYPE_FCP:
428 case IPL_TYPE_FCP_DUMP:
429 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
430 default:
431 return 0;
432 }
433 }
434
435 static struct kobj_attribute sys_ipl_device_attr =
436 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
437
438 static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
439 struct bin_attribute *attr, char *buf,
440 loff_t off, size_t count)
441 {
442 return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START,
443 IPL_PARMBLOCK_SIZE);
444 }
445 static struct bin_attribute ipl_parameter_attr =
446 __BIN_ATTR(binary_parameter, S_IRUGO, ipl_parameter_read, NULL,
447 PAGE_SIZE);
448
449 static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
450 struct bin_attribute *attr, char *buf,
451 loff_t off, size_t count)
452 {
453 unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
454 void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
455
456 return memory_read_from_buffer(buf, count, &off, scp_data, size);
457 }
458 static struct bin_attribute ipl_scp_data_attr =
459 __BIN_ATTR(scp_data, S_IRUGO, ipl_scp_data_read, NULL, PAGE_SIZE);
460
461 static struct bin_attribute *ipl_fcp_bin_attrs[] = {
462 &ipl_parameter_attr,
463 &ipl_scp_data_attr,
464 NULL,
465 };
466
467 /* FCP ipl device attributes */
468
469 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
470 IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
471 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
472 IPL_PARMBLOCK_START->ipl_info.fcp.lun);
473 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
474 IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
475 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
476 IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
477
478 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
479 struct kobj_attribute *attr, char *page)
480 {
481 char loadparm[LOADPARM_LEN + 1] = {};
482
483 if (!sclp_ipl_info.is_valid)
484 return sprintf(page, "#unknown#\n");
485 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
486 EBCASC(loadparm, LOADPARM_LEN);
487 strim(loadparm);
488 return sprintf(page, "%s\n", loadparm);
489 }
490
491 static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
492 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
493
494 static struct attribute *ipl_fcp_attrs[] = {
495 &sys_ipl_type_attr.attr,
496 &sys_ipl_device_attr.attr,
497 &sys_ipl_fcp_wwpn_attr.attr,
498 &sys_ipl_fcp_lun_attr.attr,
499 &sys_ipl_fcp_bootprog_attr.attr,
500 &sys_ipl_fcp_br_lba_attr.attr,
501 &sys_ipl_ccw_loadparm_attr.attr,
502 NULL,
503 };
504
505 static struct attribute_group ipl_fcp_attr_group = {
506 .attrs = ipl_fcp_attrs,
507 .bin_attrs = ipl_fcp_bin_attrs,
508 };
509
510 /* CCW ipl device attributes */
511
512 static struct attribute *ipl_ccw_attrs_vm[] = {
513 &sys_ipl_type_attr.attr,
514 &sys_ipl_device_attr.attr,
515 &sys_ipl_ccw_loadparm_attr.attr,
516 &sys_ipl_vm_parm_attr.attr,
517 NULL,
518 };
519
520 static struct attribute *ipl_ccw_attrs_lpar[] = {
521 &sys_ipl_type_attr.attr,
522 &sys_ipl_device_attr.attr,
523 &sys_ipl_ccw_loadparm_attr.attr,
524 NULL,
525 };
526
527 static struct attribute_group ipl_ccw_attr_group_vm = {
528 .attrs = ipl_ccw_attrs_vm,
529 };
530
531 static struct attribute_group ipl_ccw_attr_group_lpar = {
532 .attrs = ipl_ccw_attrs_lpar
533 };
534
535 /* NSS ipl device attributes */
536
537 DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
538
539 static struct attribute *ipl_nss_attrs[] = {
540 &sys_ipl_type_attr.attr,
541 &sys_ipl_nss_name_attr.attr,
542 &sys_ipl_ccw_loadparm_attr.attr,
543 &sys_ipl_vm_parm_attr.attr,
544 NULL,
545 };
546
547 static struct attribute_group ipl_nss_attr_group = {
548 .attrs = ipl_nss_attrs,
549 };
550
551 /* UNKNOWN ipl device attributes */
552
553 static struct attribute *ipl_unknown_attrs[] = {
554 &sys_ipl_type_attr.attr,
555 NULL,
556 };
557
558 static struct attribute_group ipl_unknown_attr_group = {
559 .attrs = ipl_unknown_attrs,
560 };
561
562 static struct kset *ipl_kset;
563
564 static void __ipl_run(void *unused)
565 {
566 diag308(DIAG308_IPL, NULL);
567 if (MACHINE_IS_VM)
568 __cpcmd("IPL", NULL, 0, NULL);
569 else if (ipl_info.type == IPL_TYPE_CCW)
570 reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
571 }
572
573 static void ipl_run(struct shutdown_trigger *trigger)
574 {
575 smp_call_ipl_cpu(__ipl_run, NULL);
576 }
577
578 static int __init ipl_init(void)
579 {
580 int rc;
581
582 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
583 if (!ipl_kset) {
584 rc = -ENOMEM;
585 goto out;
586 }
587 switch (ipl_info.type) {
588 case IPL_TYPE_CCW:
589 if (MACHINE_IS_VM)
590 rc = sysfs_create_group(&ipl_kset->kobj,
591 &ipl_ccw_attr_group_vm);
592 else
593 rc = sysfs_create_group(&ipl_kset->kobj,
594 &ipl_ccw_attr_group_lpar);
595 break;
596 case IPL_TYPE_FCP:
597 case IPL_TYPE_FCP_DUMP:
598 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
599 break;
600 case IPL_TYPE_NSS:
601 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group);
602 break;
603 default:
604 rc = sysfs_create_group(&ipl_kset->kobj,
605 &ipl_unknown_attr_group);
606 break;
607 }
608 out:
609 if (rc)
610 panic("ipl_init failed: rc = %i\n", rc);
611
612 return 0;
613 }
614
615 static struct shutdown_action __refdata ipl_action = {
616 .name = SHUTDOWN_ACTION_IPL_STR,
617 .fn = ipl_run,
618 .init = ipl_init,
619 };
620
621 /*
622 * reipl shutdown action: Reboot Linux on shutdown.
623 */
624
625 /* VM IPL PARM attributes */
626 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
627 char *page)
628 {
629 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
630
631 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
632 return sprintf(page, "%s\n", vmparm);
633 }
634
635 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
636 size_t vmparm_max,
637 const char *buf, size_t len)
638 {
639 int i, ip_len;
640
641 /* ignore trailing newline */
642 ip_len = len;
643 if ((len > 0) && (buf[len - 1] == '\n'))
644 ip_len--;
645
646 if (ip_len > vmparm_max)
647 return -EINVAL;
648
649 /* parm is used to store kernel options, check for common chars */
650 for (i = 0; i < ip_len; i++)
651 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
652 return -EINVAL;
653
654 memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
655 ipb->ipl_info.ccw.vm_parm_len = ip_len;
656 if (ip_len > 0) {
657 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
658 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
659 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
660 } else {
661 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
662 }
663
664 return len;
665 }
666
667 /* NSS wrapper */
668 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
669 struct kobj_attribute *attr, char *page)
670 {
671 return reipl_generic_vmparm_show(reipl_block_nss, page);
672 }
673
674 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
675 struct kobj_attribute *attr,
676 const char *buf, size_t len)
677 {
678 return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
679 }
680
681 /* CCW wrapper */
682 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
683 struct kobj_attribute *attr, char *page)
684 {
685 return reipl_generic_vmparm_show(reipl_block_ccw, page);
686 }
687
688 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
689 struct kobj_attribute *attr,
690 const char *buf, size_t len)
691 {
692 return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
693 }
694
695 static struct kobj_attribute sys_reipl_nss_vmparm_attr =
696 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
697 reipl_nss_vmparm_store);
698 static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
699 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
700 reipl_ccw_vmparm_store);
701
702 /* FCP reipl device attributes */
703
704 static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
705 struct bin_attribute *attr,
706 char *buf, loff_t off, size_t count)
707 {
708 size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
709 void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
710
711 return memory_read_from_buffer(buf, count, &off, scp_data, size);
712 }
713
714 static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
715 struct bin_attribute *attr,
716 char *buf, loff_t off, size_t count)
717 {
718 size_t scpdata_len = count;
719 size_t padding;
720
721
722 if (off)
723 return -EINVAL;
724
725 memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf, count);
726 if (scpdata_len % 8) {
727 padding = 8 - (scpdata_len % 8);
728 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
729 0, padding);
730 scpdata_len += padding;
731 }
732
733 reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
734 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
735 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
736
737 return count;
738 }
739 static struct bin_attribute sys_reipl_fcp_scp_data_attr =
740 __BIN_ATTR(scp_data, (S_IRUGO | S_IWUSR), reipl_fcp_scpdata_read,
741 reipl_fcp_scpdata_write, DIAG308_SCPDATA_SIZE);
742
743 static struct bin_attribute *reipl_fcp_bin_attrs[] = {
744 &sys_reipl_fcp_scp_data_attr,
745 NULL,
746 };
747
748 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n",
749 reipl_block_fcp->ipl_info.fcp.wwpn);
750 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n",
751 reipl_block_fcp->ipl_info.fcp.lun);
752 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
753 reipl_block_fcp->ipl_info.fcp.bootprog);
754 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
755 reipl_block_fcp->ipl_info.fcp.br_lba);
756 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
757 reipl_block_fcp->ipl_info.fcp.devno);
758
759 static void reipl_get_ascii_loadparm(char *loadparm,
760 struct ipl_parameter_block *ibp)
761 {
762 memcpy(loadparm, ibp->hdr.loadparm, LOADPARM_LEN);
763 EBCASC(loadparm, LOADPARM_LEN);
764 loadparm[LOADPARM_LEN] = 0;
765 strim(loadparm);
766 }
767
768 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
769 char *page)
770 {
771 char buf[LOADPARM_LEN + 1];
772
773 reipl_get_ascii_loadparm(buf, ipb);
774 return sprintf(page, "%s\n", buf);
775 }
776
777 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
778 const char *buf, size_t len)
779 {
780 int i, lp_len;
781
782 /* ignore trailing newline */
783 lp_len = len;
784 if ((len > 0) && (buf[len - 1] == '\n'))
785 lp_len--;
786 /* loadparm can have max 8 characters and must not start with a blank */
787 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
788 return -EINVAL;
789 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
790 for (i = 0; i < lp_len; i++) {
791 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
792 (buf[i] == '.'))
793 continue;
794 return -EINVAL;
795 }
796 /* initialize loadparm with blanks */
797 memset(ipb->hdr.loadparm, ' ', LOADPARM_LEN);
798 /* copy and convert to ebcdic */
799 memcpy(ipb->hdr.loadparm, buf, lp_len);
800 ASCEBC(ipb->hdr.loadparm, LOADPARM_LEN);
801 return len;
802 }
803
804 /* FCP wrapper */
805 static ssize_t reipl_fcp_loadparm_show(struct kobject *kobj,
806 struct kobj_attribute *attr, char *page)
807 {
808 return reipl_generic_loadparm_show(reipl_block_fcp, page);
809 }
810
811 static ssize_t reipl_fcp_loadparm_store(struct kobject *kobj,
812 struct kobj_attribute *attr,
813 const char *buf, size_t len)
814 {
815 return reipl_generic_loadparm_store(reipl_block_fcp, buf, len);
816 }
817
818 static struct kobj_attribute sys_reipl_fcp_loadparm_attr =
819 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_fcp_loadparm_show,
820 reipl_fcp_loadparm_store);
821
822 static struct attribute *reipl_fcp_attrs[] = {
823 &sys_reipl_fcp_device_attr.attr,
824 &sys_reipl_fcp_wwpn_attr.attr,
825 &sys_reipl_fcp_lun_attr.attr,
826 &sys_reipl_fcp_bootprog_attr.attr,
827 &sys_reipl_fcp_br_lba_attr.attr,
828 &sys_reipl_fcp_loadparm_attr.attr,
829 NULL,
830 };
831
832 static struct attribute_group reipl_fcp_attr_group = {
833 .attrs = reipl_fcp_attrs,
834 .bin_attrs = reipl_fcp_bin_attrs,
835 };
836
837 /* CCW reipl device attributes */
838 DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ipl_info.ccw);
839
840 /* NSS wrapper */
841 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
842 struct kobj_attribute *attr, char *page)
843 {
844 return reipl_generic_loadparm_show(reipl_block_nss, page);
845 }
846
847 static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
848 struct kobj_attribute *attr,
849 const char *buf, size_t len)
850 {
851 return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
852 }
853
854 /* CCW wrapper */
855 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
856 struct kobj_attribute *attr, char *page)
857 {
858 return reipl_generic_loadparm_show(reipl_block_ccw, page);
859 }
860
861 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
862 struct kobj_attribute *attr,
863 const char *buf, size_t len)
864 {
865 return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
866 }
867
868 static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
869 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
870 reipl_ccw_loadparm_store);
871
872 static struct attribute *reipl_ccw_attrs_vm[] = {
873 &sys_reipl_ccw_device_attr.attr,
874 &sys_reipl_ccw_loadparm_attr.attr,
875 &sys_reipl_ccw_vmparm_attr.attr,
876 NULL,
877 };
878
879 static struct attribute *reipl_ccw_attrs_lpar[] = {
880 &sys_reipl_ccw_device_attr.attr,
881 &sys_reipl_ccw_loadparm_attr.attr,
882 NULL,
883 };
884
885 static struct attribute_group reipl_ccw_attr_group_vm = {
886 .name = IPL_CCW_STR,
887 .attrs = reipl_ccw_attrs_vm,
888 };
889
890 static struct attribute_group reipl_ccw_attr_group_lpar = {
891 .name = IPL_CCW_STR,
892 .attrs = reipl_ccw_attrs_lpar,
893 };
894
895
896 /* NSS reipl device attributes */
897 static void reipl_get_ascii_nss_name(char *dst,
898 struct ipl_parameter_block *ipb)
899 {
900 memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
901 EBCASC(dst, NSS_NAME_SIZE);
902 dst[NSS_NAME_SIZE] = 0;
903 }
904
905 static ssize_t reipl_nss_name_show(struct kobject *kobj,
906 struct kobj_attribute *attr, char *page)
907 {
908 char nss_name[NSS_NAME_SIZE + 1] = {};
909
910 reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
911 return sprintf(page, "%s\n", nss_name);
912 }
913
914 static ssize_t reipl_nss_name_store(struct kobject *kobj,
915 struct kobj_attribute *attr,
916 const char *buf, size_t len)
917 {
918 int nss_len;
919
920 /* ignore trailing newline */
921 nss_len = len;
922 if ((len > 0) && (buf[len - 1] == '\n'))
923 nss_len--;
924
925 if (nss_len > NSS_NAME_SIZE)
926 return -EINVAL;
927
928 memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
929 if (nss_len > 0) {
930 reipl_block_nss->ipl_info.ccw.vm_flags |=
931 DIAG308_VM_FLAGS_NSS_VALID;
932 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
933 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
934 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
935 } else {
936 reipl_block_nss->ipl_info.ccw.vm_flags &=
937 ~DIAG308_VM_FLAGS_NSS_VALID;
938 }
939
940 return len;
941 }
942
943 static struct kobj_attribute sys_reipl_nss_name_attr =
944 __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
945 reipl_nss_name_store);
946
947 static struct kobj_attribute sys_reipl_nss_loadparm_attr =
948 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
949 reipl_nss_loadparm_store);
950
951 static struct attribute *reipl_nss_attrs[] = {
952 &sys_reipl_nss_name_attr.attr,
953 &sys_reipl_nss_loadparm_attr.attr,
954 &sys_reipl_nss_vmparm_attr.attr,
955 NULL,
956 };
957
958 static struct attribute_group reipl_nss_attr_group = {
959 .name = IPL_NSS_STR,
960 .attrs = reipl_nss_attrs,
961 };
962
963 static void set_reipl_block_actual(struct ipl_parameter_block *reipl_block)
964 {
965 reipl_block_actual = reipl_block;
966 os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual,
967 reipl_block->hdr.len);
968 }
969
970 /* reipl type */
971
972 static int reipl_set_type(enum ipl_type type)
973 {
974 if (!(reipl_capabilities & type))
975 return -EINVAL;
976
977 switch(type) {
978 case IPL_TYPE_CCW:
979 if (diag308_set_works)
980 reipl_method = REIPL_METHOD_CCW_DIAG;
981 else if (MACHINE_IS_VM)
982 reipl_method = REIPL_METHOD_CCW_VM;
983 else
984 reipl_method = REIPL_METHOD_CCW_CIO;
985 set_reipl_block_actual(reipl_block_ccw);
986 break;
987 case IPL_TYPE_FCP:
988 if (diag308_set_works)
989 reipl_method = REIPL_METHOD_FCP_RW_DIAG;
990 else if (MACHINE_IS_VM)
991 reipl_method = REIPL_METHOD_FCP_RO_VM;
992 else
993 reipl_method = REIPL_METHOD_FCP_RO_DIAG;
994 set_reipl_block_actual(reipl_block_fcp);
995 break;
996 case IPL_TYPE_FCP_DUMP:
997 reipl_method = REIPL_METHOD_FCP_DUMP;
998 break;
999 case IPL_TYPE_NSS:
1000 if (diag308_set_works)
1001 reipl_method = REIPL_METHOD_NSS_DIAG;
1002 else
1003 reipl_method = REIPL_METHOD_NSS;
1004 set_reipl_block_actual(reipl_block_nss);
1005 break;
1006 case IPL_TYPE_UNKNOWN:
1007 reipl_method = REIPL_METHOD_DEFAULT;
1008 break;
1009 default:
1010 BUG();
1011 }
1012 reipl_type = type;
1013 return 0;
1014 }
1015
1016 static ssize_t reipl_type_show(struct kobject *kobj,
1017 struct kobj_attribute *attr, char *page)
1018 {
1019 return sprintf(page, "%s\n", ipl_type_str(reipl_type));
1020 }
1021
1022 static ssize_t reipl_type_store(struct kobject *kobj,
1023 struct kobj_attribute *attr,
1024 const char *buf, size_t len)
1025 {
1026 int rc = -EINVAL;
1027
1028 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1029 rc = reipl_set_type(IPL_TYPE_CCW);
1030 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1031 rc = reipl_set_type(IPL_TYPE_FCP);
1032 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1033 rc = reipl_set_type(IPL_TYPE_NSS);
1034 return (rc != 0) ? rc : len;
1035 }
1036
1037 static struct kobj_attribute reipl_type_attr =
1038 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
1039
1040 static struct kset *reipl_kset;
1041 static struct kset *reipl_fcp_kset;
1042
1043 static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
1044 const enum ipl_method m)
1045 {
1046 char loadparm[LOADPARM_LEN + 1] = {};
1047 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
1048 char nss_name[NSS_NAME_SIZE + 1] = {};
1049 size_t pos = 0;
1050
1051 reipl_get_ascii_loadparm(loadparm, ipb);
1052 reipl_get_ascii_nss_name(nss_name, ipb);
1053 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
1054
1055 switch (m) {
1056 case REIPL_METHOD_CCW_VM:
1057 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
1058 break;
1059 case REIPL_METHOD_NSS:
1060 pos = sprintf(dst, "IPL %s", nss_name);
1061 break;
1062 default:
1063 break;
1064 }
1065 if (strlen(loadparm) > 0)
1066 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
1067 if (strlen(vmparm) > 0)
1068 sprintf(dst + pos, " PARM %s", vmparm);
1069 }
1070
1071 static void __reipl_run(void *unused)
1072 {
1073 struct ccw_dev_id devid;
1074 static char buf[128];
1075
1076 switch (reipl_method) {
1077 case REIPL_METHOD_CCW_CIO:
1078 devid.ssid = reipl_block_ccw->ipl_info.ccw.ssid;
1079 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
1080 reipl_ccw_dev(&devid);
1081 break;
1082 case REIPL_METHOD_CCW_VM:
1083 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
1084 __cpcmd(buf, NULL, 0, NULL);
1085 break;
1086 case REIPL_METHOD_CCW_DIAG:
1087 diag308(DIAG308_SET, reipl_block_ccw);
1088 diag308(DIAG308_IPL, NULL);
1089 break;
1090 case REIPL_METHOD_FCP_RW_DIAG:
1091 diag308(DIAG308_SET, reipl_block_fcp);
1092 diag308(DIAG308_IPL, NULL);
1093 break;
1094 case REIPL_METHOD_FCP_RO_DIAG:
1095 diag308(DIAG308_IPL, NULL);
1096 break;
1097 case REIPL_METHOD_FCP_RO_VM:
1098 __cpcmd("IPL", NULL, 0, NULL);
1099 break;
1100 case REIPL_METHOD_NSS_DIAG:
1101 diag308(DIAG308_SET, reipl_block_nss);
1102 diag308(DIAG308_IPL, NULL);
1103 break;
1104 case REIPL_METHOD_NSS:
1105 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
1106 __cpcmd(buf, NULL, 0, NULL);
1107 break;
1108 case REIPL_METHOD_DEFAULT:
1109 if (MACHINE_IS_VM)
1110 __cpcmd("IPL", NULL, 0, NULL);
1111 diag308(DIAG308_IPL, NULL);
1112 break;
1113 case REIPL_METHOD_FCP_DUMP:
1114 break;
1115 }
1116 disabled_wait((unsigned long) __builtin_return_address(0));
1117 }
1118
1119 static void reipl_run(struct shutdown_trigger *trigger)
1120 {
1121 smp_call_ipl_cpu(__reipl_run, NULL);
1122 }
1123
1124 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
1125 {
1126 ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
1127 ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1128 ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1129 ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1130 }
1131
1132 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1133 {
1134 /* LOADPARM */
1135 /* check if read scp info worked and set loadparm */
1136 if (sclp_ipl_info.is_valid)
1137 memcpy(ipb->hdr.loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
1138 else
1139 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1140 memset(ipb->hdr.loadparm, 0x40, LOADPARM_LEN);
1141 ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
1142
1143 /* VM PARM */
1144 if (MACHINE_IS_VM && diag308_set_works &&
1145 (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1146
1147 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1148 ipb->ipl_info.ccw.vm_parm_len =
1149 ipl_block.ipl_info.ccw.vm_parm_len;
1150 memcpy(ipb->ipl_info.ccw.vm_parm,
1151 ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1152 }
1153 }
1154
1155 static int __init reipl_nss_init(void)
1156 {
1157 int rc;
1158
1159 if (!MACHINE_IS_VM)
1160 return 0;
1161
1162 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1163 if (!reipl_block_nss)
1164 return -ENOMEM;
1165
1166 if (!diag308_set_works)
1167 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO;
1168
1169 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1170 if (rc)
1171 return rc;
1172
1173 reipl_block_ccw_init(reipl_block_nss);
1174 if (ipl_info.type == IPL_TYPE_NSS) {
1175 memset(reipl_block_nss->ipl_info.ccw.nss_name,
1176 ' ', NSS_NAME_SIZE);
1177 memcpy(reipl_block_nss->ipl_info.ccw.nss_name,
1178 kernel_nss_name, strlen(kernel_nss_name));
1179 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
1180 reipl_block_nss->ipl_info.ccw.vm_flags |=
1181 DIAG308_VM_FLAGS_NSS_VALID;
1182
1183 reipl_block_ccw_fill_parms(reipl_block_nss);
1184 }
1185
1186 reipl_capabilities |= IPL_TYPE_NSS;
1187 return 0;
1188 }
1189
1190 static int __init reipl_ccw_init(void)
1191 {
1192 int rc;
1193
1194 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1195 if (!reipl_block_ccw)
1196 return -ENOMEM;
1197
1198 if (MACHINE_IS_VM) {
1199 if (!diag308_set_works)
1200 sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
1201 rc = sysfs_create_group(&reipl_kset->kobj,
1202 &reipl_ccw_attr_group_vm);
1203 } else {
1204 if(!diag308_set_works)
1205 sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
1206 rc = sysfs_create_group(&reipl_kset->kobj,
1207 &reipl_ccw_attr_group_lpar);
1208 }
1209 if (rc)
1210 return rc;
1211
1212 reipl_block_ccw_init(reipl_block_ccw);
1213 if (ipl_info.type == IPL_TYPE_CCW) {
1214 reipl_block_ccw->ipl_info.ccw.ssid = ipl_ssid;
1215 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
1216 reipl_block_ccw_fill_parms(reipl_block_ccw);
1217 }
1218
1219 reipl_capabilities |= IPL_TYPE_CCW;
1220 return 0;
1221 }
1222
1223 static int __init reipl_fcp_init(void)
1224 {
1225 int rc;
1226
1227 if (!diag308_set_works) {
1228 if (ipl_info.type == IPL_TYPE_FCP) {
1229 make_attrs_ro(reipl_fcp_attrs);
1230 sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO;
1231 } else
1232 return 0;
1233 }
1234
1235 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1236 if (!reipl_block_fcp)
1237 return -ENOMEM;
1238
1239 /* sysfs: create fcp kset for mixing attr group and bin attrs */
1240 reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1241 &reipl_kset->kobj);
1242 if (!reipl_fcp_kset) {
1243 free_page((unsigned long) reipl_block_fcp);
1244 return -ENOMEM;
1245 }
1246
1247 rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1248 if (rc) {
1249 kset_unregister(reipl_fcp_kset);
1250 free_page((unsigned long) reipl_block_fcp);
1251 return rc;
1252 }
1253
1254 if (ipl_info.type == IPL_TYPE_FCP) {
1255 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
1256 /*
1257 * Fix loadparm: There are systems where the (SCSI) LOADPARM
1258 * is invalid in the SCSI IPL parameter block, so take it
1259 * always from sclp_ipl_info.
1260 */
1261 memcpy(reipl_block_fcp->hdr.loadparm, sclp_ipl_info.loadparm,
1262 LOADPARM_LEN);
1263 } else {
1264 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1265 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1266 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1267 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1268 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1269 }
1270 reipl_capabilities |= IPL_TYPE_FCP;
1271 return 0;
1272 }
1273
1274 static int __init reipl_type_init(void)
1275 {
1276 enum ipl_type reipl_type = ipl_info.type;
1277 struct ipl_parameter_block *reipl_block;
1278 unsigned long size;
1279
1280 reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size);
1281 if (!reipl_block)
1282 goto out;
1283 /*
1284 * If we have an OS info reipl block, this will be used
1285 */
1286 if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_FCP) {
1287 memcpy(reipl_block_fcp, reipl_block, size);
1288 reipl_type = IPL_TYPE_FCP;
1289 } else if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_CCW) {
1290 memcpy(reipl_block_ccw, reipl_block, size);
1291 reipl_type = IPL_TYPE_CCW;
1292 }
1293 out:
1294 return reipl_set_type(reipl_type);
1295 }
1296
1297 static int __init reipl_init(void)
1298 {
1299 int rc;
1300
1301 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1302 if (!reipl_kset)
1303 return -ENOMEM;
1304 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1305 if (rc) {
1306 kset_unregister(reipl_kset);
1307 return rc;
1308 }
1309 rc = reipl_ccw_init();
1310 if (rc)
1311 return rc;
1312 rc = reipl_fcp_init();
1313 if (rc)
1314 return rc;
1315 rc = reipl_nss_init();
1316 if (rc)
1317 return rc;
1318 return reipl_type_init();
1319 }
1320
1321 static struct shutdown_action __refdata reipl_action = {
1322 .name = SHUTDOWN_ACTION_REIPL_STR,
1323 .fn = reipl_run,
1324 .init = reipl_init,
1325 };
1326
1327 /*
1328 * dump shutdown action: Dump Linux on shutdown.
1329 */
1330
1331 /* FCP dump device attributes */
1332
1333 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n",
1334 dump_block_fcp->ipl_info.fcp.wwpn);
1335 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n",
1336 dump_block_fcp->ipl_info.fcp.lun);
1337 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1338 dump_block_fcp->ipl_info.fcp.bootprog);
1339 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1340 dump_block_fcp->ipl_info.fcp.br_lba);
1341 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1342 dump_block_fcp->ipl_info.fcp.devno);
1343
1344 static struct attribute *dump_fcp_attrs[] = {
1345 &sys_dump_fcp_device_attr.attr,
1346 &sys_dump_fcp_wwpn_attr.attr,
1347 &sys_dump_fcp_lun_attr.attr,
1348 &sys_dump_fcp_bootprog_attr.attr,
1349 &sys_dump_fcp_br_lba_attr.attr,
1350 NULL,
1351 };
1352
1353 static struct attribute_group dump_fcp_attr_group = {
1354 .name = IPL_FCP_STR,
1355 .attrs = dump_fcp_attrs,
1356 };
1357
1358 /* CCW dump device attributes */
1359 DEFINE_IPL_CCW_ATTR_RW(dump_ccw, device, dump_block_ccw->ipl_info.ccw);
1360
1361 static struct attribute *dump_ccw_attrs[] = {
1362 &sys_dump_ccw_device_attr.attr,
1363 NULL,
1364 };
1365
1366 static struct attribute_group dump_ccw_attr_group = {
1367 .name = IPL_CCW_STR,
1368 .attrs = dump_ccw_attrs,
1369 };
1370
1371 /* dump type */
1372
1373 static int dump_set_type(enum dump_type type)
1374 {
1375 if (!(dump_capabilities & type))
1376 return -EINVAL;
1377 switch (type) {
1378 case DUMP_TYPE_CCW:
1379 if (diag308_set_works)
1380 dump_method = DUMP_METHOD_CCW_DIAG;
1381 else if (MACHINE_IS_VM)
1382 dump_method = DUMP_METHOD_CCW_VM;
1383 else
1384 dump_method = DUMP_METHOD_CCW_CIO;
1385 break;
1386 case DUMP_TYPE_FCP:
1387 dump_method = DUMP_METHOD_FCP_DIAG;
1388 break;
1389 default:
1390 dump_method = DUMP_METHOD_NONE;
1391 }
1392 dump_type = type;
1393 return 0;
1394 }
1395
1396 static ssize_t dump_type_show(struct kobject *kobj,
1397 struct kobj_attribute *attr, char *page)
1398 {
1399 return sprintf(page, "%s\n", dump_type_str(dump_type));
1400 }
1401
1402 static ssize_t dump_type_store(struct kobject *kobj,
1403 struct kobj_attribute *attr,
1404 const char *buf, size_t len)
1405 {
1406 int rc = -EINVAL;
1407
1408 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1409 rc = dump_set_type(DUMP_TYPE_NONE);
1410 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1411 rc = dump_set_type(DUMP_TYPE_CCW);
1412 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1413 rc = dump_set_type(DUMP_TYPE_FCP);
1414 return (rc != 0) ? rc : len;
1415 }
1416
1417 static struct kobj_attribute dump_type_attr =
1418 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1419
1420 static struct kset *dump_kset;
1421
1422 static void diag308_dump(void *dump_block)
1423 {
1424 diag308(DIAG308_SET, dump_block);
1425 while (1) {
1426 if (diag308(DIAG308_DUMP, NULL) != 0x302)
1427 break;
1428 udelay_simple(USEC_PER_SEC);
1429 }
1430 }
1431
1432 static void __dump_run(void *unused)
1433 {
1434 struct ccw_dev_id devid;
1435 static char buf[100];
1436
1437 switch (dump_method) {
1438 case DUMP_METHOD_CCW_CIO:
1439 devid.ssid = dump_block_ccw->ipl_info.ccw.ssid;
1440 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
1441 reipl_ccw_dev(&devid);
1442 break;
1443 case DUMP_METHOD_CCW_VM:
1444 sprintf(buf, "STORE STATUS");
1445 __cpcmd(buf, NULL, 0, NULL);
1446 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
1447 __cpcmd(buf, NULL, 0, NULL);
1448 break;
1449 case DUMP_METHOD_CCW_DIAG:
1450 diag308_dump(dump_block_ccw);
1451 break;
1452 case DUMP_METHOD_FCP_DIAG:
1453 diag308_dump(dump_block_fcp);
1454 break;
1455 default:
1456 break;
1457 }
1458 }
1459
1460 static void dump_run(struct shutdown_trigger *trigger)
1461 {
1462 if (dump_method == DUMP_METHOD_NONE)
1463 return;
1464 smp_send_stop();
1465 smp_call_ipl_cpu(__dump_run, NULL);
1466 }
1467
1468 static int __init dump_ccw_init(void)
1469 {
1470 int rc;
1471
1472 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1473 if (!dump_block_ccw)
1474 return -ENOMEM;
1475 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1476 if (rc) {
1477 free_page((unsigned long)dump_block_ccw);
1478 return rc;
1479 }
1480 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1481 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1482 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1483 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1484 dump_capabilities |= DUMP_TYPE_CCW;
1485 return 0;
1486 }
1487
1488 static int __init dump_fcp_init(void)
1489 {
1490 int rc;
1491
1492 if (!sclp_ipl_info.has_dump)
1493 return 0; /* LDIPL DUMP is not installed */
1494 if (!diag308_set_works)
1495 return 0;
1496 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1497 if (!dump_block_fcp)
1498 return -ENOMEM;
1499 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1500 if (rc) {
1501 free_page((unsigned long)dump_block_fcp);
1502 return rc;
1503 }
1504 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1505 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1506 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1507 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1508 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1509 dump_capabilities |= DUMP_TYPE_FCP;
1510 return 0;
1511 }
1512
1513 static int __init dump_init(void)
1514 {
1515 int rc;
1516
1517 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1518 if (!dump_kset)
1519 return -ENOMEM;
1520 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1521 if (rc) {
1522 kset_unregister(dump_kset);
1523 return rc;
1524 }
1525 rc = dump_ccw_init();
1526 if (rc)
1527 return rc;
1528 rc = dump_fcp_init();
1529 if (rc)
1530 return rc;
1531 dump_set_type(DUMP_TYPE_NONE);
1532 return 0;
1533 }
1534
1535 static struct shutdown_action __refdata dump_action = {
1536 .name = SHUTDOWN_ACTION_DUMP_STR,
1537 .fn = dump_run,
1538 .init = dump_init,
1539 };
1540
1541 static void dump_reipl_run(struct shutdown_trigger *trigger)
1542 {
1543 unsigned long ipib = (unsigned long) reipl_block_actual;
1544 unsigned int csum;
1545
1546 csum = csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
1547 mem_assign_absolute(S390_lowcore.ipib, ipib);
1548 mem_assign_absolute(S390_lowcore.ipib_checksum, csum);
1549 dump_run(trigger);
1550 }
1551
1552 static int __init dump_reipl_init(void)
1553 {
1554 if (!diag308_set_works)
1555 return -EOPNOTSUPP;
1556 else
1557 return 0;
1558 }
1559
1560 static struct shutdown_action __refdata dump_reipl_action = {
1561 .name = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1562 .fn = dump_reipl_run,
1563 .init = dump_reipl_init,
1564 };
1565
1566 /*
1567 * vmcmd shutdown action: Trigger vm command on shutdown.
1568 */
1569
1570 static char vmcmd_on_reboot[128];
1571 static char vmcmd_on_panic[128];
1572 static char vmcmd_on_halt[128];
1573 static char vmcmd_on_poff[128];
1574 static char vmcmd_on_restart[128];
1575
1576 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1577 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1578 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1579 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1580 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1581
1582 static struct attribute *vmcmd_attrs[] = {
1583 &sys_vmcmd_on_reboot_attr.attr,
1584 &sys_vmcmd_on_panic_attr.attr,
1585 &sys_vmcmd_on_halt_attr.attr,
1586 &sys_vmcmd_on_poff_attr.attr,
1587 &sys_vmcmd_on_restart_attr.attr,
1588 NULL,
1589 };
1590
1591 static struct attribute_group vmcmd_attr_group = {
1592 .attrs = vmcmd_attrs,
1593 };
1594
1595 static struct kset *vmcmd_kset;
1596
1597 static void vmcmd_run(struct shutdown_trigger *trigger)
1598 {
1599 char *cmd;
1600
1601 if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1602 cmd = vmcmd_on_reboot;
1603 else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1604 cmd = vmcmd_on_panic;
1605 else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1606 cmd = vmcmd_on_halt;
1607 else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1608 cmd = vmcmd_on_poff;
1609 else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
1610 cmd = vmcmd_on_restart;
1611 else
1612 return;
1613
1614 if (strlen(cmd) == 0)
1615 return;
1616 __cpcmd(cmd, NULL, 0, NULL);
1617 }
1618
1619 static int vmcmd_init(void)
1620 {
1621 if (!MACHINE_IS_VM)
1622 return -EOPNOTSUPP;
1623 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1624 if (!vmcmd_kset)
1625 return -ENOMEM;
1626 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1627 }
1628
1629 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1630 vmcmd_run, vmcmd_init};
1631
1632 /*
1633 * stop shutdown action: Stop Linux on shutdown.
1634 */
1635
1636 static void stop_run(struct shutdown_trigger *trigger)
1637 {
1638 if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
1639 strcmp(trigger->name, ON_RESTART_STR) == 0)
1640 disabled_wait((unsigned long) __builtin_return_address(0));
1641 smp_stop_cpu();
1642 }
1643
1644 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1645 stop_run, NULL};
1646
1647 /* action list */
1648
1649 static struct shutdown_action *shutdown_actions_list[] = {
1650 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1651 &vmcmd_action, &stop_action};
1652 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1653
1654 /*
1655 * Trigger section
1656 */
1657
1658 static struct kset *shutdown_actions_kset;
1659
1660 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1661 size_t len)
1662 {
1663 int i;
1664
1665 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1666 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1667 if (shutdown_actions_list[i]->init_rc) {
1668 return shutdown_actions_list[i]->init_rc;
1669 } else {
1670 trigger->action = shutdown_actions_list[i];
1671 return len;
1672 }
1673 }
1674 }
1675 return -EINVAL;
1676 }
1677
1678 /* on reipl */
1679
1680 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1681 &reipl_action};
1682
1683 static ssize_t on_reboot_show(struct kobject *kobj,
1684 struct kobj_attribute *attr, char *page)
1685 {
1686 return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1687 }
1688
1689 static ssize_t on_reboot_store(struct kobject *kobj,
1690 struct kobj_attribute *attr,
1691 const char *buf, size_t len)
1692 {
1693 return set_trigger(buf, &on_reboot_trigger, len);
1694 }
1695 static struct kobj_attribute on_reboot_attr = __ATTR_RW(on_reboot);
1696
1697 static void do_machine_restart(char *__unused)
1698 {
1699 smp_send_stop();
1700 on_reboot_trigger.action->fn(&on_reboot_trigger);
1701 reipl_run(NULL);
1702 }
1703 void (*_machine_restart)(char *command) = do_machine_restart;
1704
1705 /* on panic */
1706
1707 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1708
1709 static ssize_t on_panic_show(struct kobject *kobj,
1710 struct kobj_attribute *attr, char *page)
1711 {
1712 return sprintf(page, "%s\n", on_panic_trigger.action->name);
1713 }
1714
1715 static ssize_t on_panic_store(struct kobject *kobj,
1716 struct kobj_attribute *attr,
1717 const char *buf, size_t len)
1718 {
1719 return set_trigger(buf, &on_panic_trigger, len);
1720 }
1721 static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic);
1722
1723 static void do_panic(void)
1724 {
1725 lgr_info_log();
1726 on_panic_trigger.action->fn(&on_panic_trigger);
1727 stop_run(&on_panic_trigger);
1728 }
1729
1730 /* on restart */
1731
1732 static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
1733 &stop_action};
1734
1735 static ssize_t on_restart_show(struct kobject *kobj,
1736 struct kobj_attribute *attr, char *page)
1737 {
1738 return sprintf(page, "%s\n", on_restart_trigger.action->name);
1739 }
1740
1741 static ssize_t on_restart_store(struct kobject *kobj,
1742 struct kobj_attribute *attr,
1743 const char *buf, size_t len)
1744 {
1745 return set_trigger(buf, &on_restart_trigger, len);
1746 }
1747 static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart);
1748
1749 static void __do_restart(void *ignore)
1750 {
1751 __arch_local_irq_stosm(0x04); /* enable DAT */
1752 smp_send_stop();
1753 #ifdef CONFIG_CRASH_DUMP
1754 crash_kexec(NULL);
1755 #endif
1756 on_restart_trigger.action->fn(&on_restart_trigger);
1757 stop_run(&on_restart_trigger);
1758 }
1759
1760 void do_restart(void)
1761 {
1762 tracing_off();
1763 debug_locks_off();
1764 lgr_info_log();
1765 smp_call_online_cpu(__do_restart, NULL);
1766 }
1767
1768 /* on halt */
1769
1770 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1771
1772 static ssize_t on_halt_show(struct kobject *kobj,
1773 struct kobj_attribute *attr, char *page)
1774 {
1775 return sprintf(page, "%s\n", on_halt_trigger.action->name);
1776 }
1777
1778 static ssize_t on_halt_store(struct kobject *kobj,
1779 struct kobj_attribute *attr,
1780 const char *buf, size_t len)
1781 {
1782 return set_trigger(buf, &on_halt_trigger, len);
1783 }
1784 static struct kobj_attribute on_halt_attr = __ATTR_RW(on_halt);
1785
1786 static void do_machine_halt(void)
1787 {
1788 smp_send_stop();
1789 on_halt_trigger.action->fn(&on_halt_trigger);
1790 stop_run(&on_halt_trigger);
1791 }
1792 void (*_machine_halt)(void) = do_machine_halt;
1793
1794 /* on power off */
1795
1796 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1797
1798 static ssize_t on_poff_show(struct kobject *kobj,
1799 struct kobj_attribute *attr, char *page)
1800 {
1801 return sprintf(page, "%s\n", on_poff_trigger.action->name);
1802 }
1803
1804 static ssize_t on_poff_store(struct kobject *kobj,
1805 struct kobj_attribute *attr,
1806 const char *buf, size_t len)
1807 {
1808 return set_trigger(buf, &on_poff_trigger, len);
1809 }
1810 static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff);
1811
1812 static void do_machine_power_off(void)
1813 {
1814 smp_send_stop();
1815 on_poff_trigger.action->fn(&on_poff_trigger);
1816 stop_run(&on_poff_trigger);
1817 }
1818 void (*_machine_power_off)(void) = do_machine_power_off;
1819
1820 static struct attribute *shutdown_action_attrs[] = {
1821 &on_restart_attr.attr,
1822 &on_reboot_attr.attr,
1823 &on_panic_attr.attr,
1824 &on_halt_attr.attr,
1825 &on_poff_attr.attr,
1826 NULL,
1827 };
1828
1829 static struct attribute_group shutdown_action_attr_group = {
1830 .attrs = shutdown_action_attrs,
1831 };
1832
1833 static void __init shutdown_triggers_init(void)
1834 {
1835 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1836 firmware_kobj);
1837 if (!shutdown_actions_kset)
1838 goto fail;
1839 if (sysfs_create_group(&shutdown_actions_kset->kobj,
1840 &shutdown_action_attr_group))
1841 goto fail;
1842 return;
1843 fail:
1844 panic("shutdown_triggers_init failed\n");
1845 }
1846
1847 static void __init shutdown_actions_init(void)
1848 {
1849 int i;
1850
1851 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1852 if (!shutdown_actions_list[i]->init)
1853 continue;
1854 shutdown_actions_list[i]->init_rc =
1855 shutdown_actions_list[i]->init();
1856 }
1857 }
1858
1859 static int __init s390_ipl_init(void)
1860 {
1861 char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40};
1862
1863 sclp_get_ipl_info(&sclp_ipl_info);
1864 /*
1865 * Fix loadparm: There are systems where the (SCSI) LOADPARM
1866 * returned by read SCP info is invalid (contains EBCDIC blanks)
1867 * when the system has been booted via diag308. In that case we use
1868 * the value from diag308, if available.
1869 *
1870 * There are also systems where diag308 store does not work in
1871 * case the system is booted from HMC. Fortunately in this case
1872 * READ SCP info provides the correct value.
1873 */
1874 if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 &&
1875 diag308_set_works)
1876 memcpy(sclp_ipl_info.loadparm, ipl_block.hdr.loadparm,
1877 LOADPARM_LEN);
1878 shutdown_actions_init();
1879 shutdown_triggers_init();
1880 return 0;
1881 }
1882
1883 __initcall(s390_ipl_init);
1884
1885 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1886 {
1887 int sx, dx;
1888
1889 dx = 0;
1890 for (sx = 0; src[sx] != 0; sx++) {
1891 if (src[sx] == '"')
1892 continue;
1893 dst[dx++] = src[sx];
1894 if (dx >= n)
1895 break;
1896 }
1897 }
1898
1899 static int __init vmcmd_on_reboot_setup(char *str)
1900 {
1901 if (!MACHINE_IS_VM)
1902 return 1;
1903 strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1904 vmcmd_on_reboot[127] = 0;
1905 on_reboot_trigger.action = &vmcmd_action;
1906 return 1;
1907 }
1908 __setup("vmreboot=", vmcmd_on_reboot_setup);
1909
1910 static int __init vmcmd_on_panic_setup(char *str)
1911 {
1912 if (!MACHINE_IS_VM)
1913 return 1;
1914 strncpy_skip_quote(vmcmd_on_panic, str, 127);
1915 vmcmd_on_panic[127] = 0;
1916 on_panic_trigger.action = &vmcmd_action;
1917 return 1;
1918 }
1919 __setup("vmpanic=", vmcmd_on_panic_setup);
1920
1921 static int __init vmcmd_on_halt_setup(char *str)
1922 {
1923 if (!MACHINE_IS_VM)
1924 return 1;
1925 strncpy_skip_quote(vmcmd_on_halt, str, 127);
1926 vmcmd_on_halt[127] = 0;
1927 on_halt_trigger.action = &vmcmd_action;
1928 return 1;
1929 }
1930 __setup("vmhalt=", vmcmd_on_halt_setup);
1931
1932 static int __init vmcmd_on_poff_setup(char *str)
1933 {
1934 if (!MACHINE_IS_VM)
1935 return 1;
1936 strncpy_skip_quote(vmcmd_on_poff, str, 127);
1937 vmcmd_on_poff[127] = 0;
1938 on_poff_trigger.action = &vmcmd_action;
1939 return 1;
1940 }
1941 __setup("vmpoff=", vmcmd_on_poff_setup);
1942
1943 static int on_panic_notify(struct notifier_block *self,
1944 unsigned long event, void *data)
1945 {
1946 do_panic();
1947 return NOTIFY_OK;
1948 }
1949
1950 static struct notifier_block on_panic_nb = {
1951 .notifier_call = on_panic_notify,
1952 .priority = INT_MIN,
1953 };
1954
1955 void __init setup_ipl(void)
1956 {
1957 ipl_info.type = get_ipl_type();
1958 switch (ipl_info.type) {
1959 case IPL_TYPE_CCW:
1960 ipl_info.data.ccw.dev_id.ssid = ipl_ssid;
1961 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1962 break;
1963 case IPL_TYPE_FCP:
1964 case IPL_TYPE_FCP_DUMP:
1965 ipl_info.data.fcp.dev_id.ssid = 0;
1966 ipl_info.data.fcp.dev_id.devno =
1967 IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1968 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1969 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1970 break;
1971 case IPL_TYPE_NSS:
1972 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1973 sizeof(ipl_info.data.nss.name));
1974 break;
1975 case IPL_TYPE_UNKNOWN:
1976 /* We have no info to copy */
1977 break;
1978 }
1979 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1980 }
1981
1982 void __init ipl_update_parameters(void)
1983 {
1984 int rc;
1985
1986 rc = diag308(DIAG308_STORE, &ipl_block);
1987 if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
1988 diag308_set_works = 1;
1989 }
1990
1991 void __init ipl_save_parameters(void)
1992 {
1993 struct cio_iplinfo iplinfo;
1994 void *src, *dst;
1995
1996 if (cio_get_iplinfo(&iplinfo))
1997 return;
1998
1999 ipl_ssid = iplinfo.ssid;
2000 ipl_devno = iplinfo.devno;
2001 ipl_flags |= IPL_DEVNO_VALID;
2002 if (!iplinfo.is_qdio)
2003 return;
2004 ipl_flags |= IPL_PARMBLOCK_VALID;
2005 src = (void *)(unsigned long)S390_lowcore.ipl_parmblock_ptr;
2006 dst = (void *)IPL_PARMBLOCK_ORIGIN;
2007 memmove(dst, src, PAGE_SIZE);
2008 S390_lowcore.ipl_parmblock_ptr = IPL_PARMBLOCK_ORIGIN;
2009 }
2010
2011 static LIST_HEAD(rcall);
2012 static DEFINE_MUTEX(rcall_mutex);
2013
2014 void register_reset_call(struct reset_call *reset)
2015 {
2016 mutex_lock(&rcall_mutex);
2017 list_add(&reset->list, &rcall);
2018 mutex_unlock(&rcall_mutex);
2019 }
2020 EXPORT_SYMBOL_GPL(register_reset_call);
2021
2022 void unregister_reset_call(struct reset_call *reset)
2023 {
2024 mutex_lock(&rcall_mutex);
2025 list_del(&reset->list);
2026 mutex_unlock(&rcall_mutex);
2027 }
2028 EXPORT_SYMBOL_GPL(unregister_reset_call);
2029
2030 static void do_reset_calls(void)
2031 {
2032 struct reset_call *reset;
2033
2034 if (diag308_set_works) {
2035 diag308_reset();
2036 return;
2037 }
2038 list_for_each_entry(reset, &rcall, list)
2039 reset->fn();
2040 }
2041
2042 u32 dump_prefix_page;
2043
2044 void s390_reset_system(void (*fn_pre)(void),
2045 void (*fn_post)(void *), void *data)
2046 {
2047 struct _lowcore *lc;
2048
2049 lc = (struct _lowcore *)(unsigned long) store_prefix();
2050
2051 /* Stack for interrupt/machine check handler */
2052 lc->panic_stack = S390_lowcore.panic_stack;
2053
2054 /* Save prefix page address for dump case */
2055 dump_prefix_page = (u32)(unsigned long) lc;
2056
2057 /* Disable prefixing */
2058 set_prefix(0);
2059
2060 /* Disable lowcore protection */
2061 __ctl_clear_bit(0,28);
2062
2063 /* Set new machine check handler */
2064 S390_lowcore.mcck_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
2065 S390_lowcore.mcck_new_psw.addr =
2066 PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;
2067
2068 /* Set new program check handler */
2069 S390_lowcore.program_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
2070 S390_lowcore.program_new_psw.addr =
2071 PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
2072
2073 /*
2074 * Clear subchannel ID and number to signal new kernel that no CCW or
2075 * SCSI IPL has been done (for kexec and kdump)
2076 */
2077 S390_lowcore.subchannel_id = 0;
2078 S390_lowcore.subchannel_nr = 0;
2079
2080 /* Store status at absolute zero */
2081 store_status();
2082
2083 /* Call function before reset */
2084 if (fn_pre)
2085 fn_pre();
2086 do_reset_calls();
2087 /* Call function after reset */
2088 if (fn_post)
2089 fn_post(data);
2090 }
Linux with added FPC-III support