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[mirror_ubuntu-jammy-kernel.git] / arch / s390 / kernel / ipl.c
1 /*
2 * arch/s390/kernel/ipl.c
3 * ipl/reipl/dump support for Linux on s390.
4 *
5 * Copyright IBM Corp. 2005,2007
6 * Author(s): Michael Holzheu <holzheu@de.ibm.com>
7 * Heiko Carstens <heiko.carstens@de.ibm.com>
8 * Volker Sameske <sameske@de.ibm.com>
9 */
10
11 #include <linux/types.h>
12 #include <linux/module.h>
13 #include <linux/device.h>
14 #include <linux/delay.h>
15 #include <linux/reboot.h>
16 #include <linux/ctype.h>
17 #include <linux/fs.h>
18 #include <linux/gfp.h>
19 #include <asm/ipl.h>
20 #include <asm/smp.h>
21 #include <asm/setup.h>
22 #include <asm/cpcmd.h>
23 #include <asm/cio.h>
24 #include <asm/ebcdic.h>
25 #include <asm/reset.h>
26 #include <asm/sclp.h>
27 #include <asm/sigp.h>
28 #include <asm/checksum.h>
29
30 #define IPL_PARM_BLOCK_VERSION 0
31
32 #define IPL_UNKNOWN_STR "unknown"
33 #define IPL_CCW_STR "ccw"
34 #define IPL_FCP_STR "fcp"
35 #define IPL_FCP_DUMP_STR "fcp_dump"
36 #define IPL_NSS_STR "nss"
37
38 #define DUMP_CCW_STR "ccw"
39 #define DUMP_FCP_STR "fcp"
40 #define DUMP_NONE_STR "none"
41
42 /*
43 * Four shutdown trigger types are supported:
44 * - panic
45 * - halt
46 * - power off
47 * - reipl
48 */
49 #define ON_PANIC_STR "on_panic"
50 #define ON_HALT_STR "on_halt"
51 #define ON_POFF_STR "on_poff"
52 #define ON_REIPL_STR "on_reboot"
53
54 struct shutdown_action;
55 struct shutdown_trigger {
56 char *name;
57 struct shutdown_action *action;
58 };
59
60 /*
61 * The following shutdown action types are supported:
62 */
63 #define SHUTDOWN_ACTION_IPL_STR "ipl"
64 #define SHUTDOWN_ACTION_REIPL_STR "reipl"
65 #define SHUTDOWN_ACTION_DUMP_STR "dump"
66 #define SHUTDOWN_ACTION_VMCMD_STR "vmcmd"
67 #define SHUTDOWN_ACTION_STOP_STR "stop"
68 #define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl"
69
70 struct shutdown_action {
71 char *name;
72 void (*fn) (struct shutdown_trigger *trigger);
73 int (*init) (void);
74 int init_rc;
75 };
76
77 static char *ipl_type_str(enum ipl_type type)
78 {
79 switch (type) {
80 case IPL_TYPE_CCW:
81 return IPL_CCW_STR;
82 case IPL_TYPE_FCP:
83 return IPL_FCP_STR;
84 case IPL_TYPE_FCP_DUMP:
85 return IPL_FCP_DUMP_STR;
86 case IPL_TYPE_NSS:
87 return IPL_NSS_STR;
88 case IPL_TYPE_UNKNOWN:
89 default:
90 return IPL_UNKNOWN_STR;
91 }
92 }
93
94 enum dump_type {
95 DUMP_TYPE_NONE = 1,
96 DUMP_TYPE_CCW = 2,
97 DUMP_TYPE_FCP = 4,
98 };
99
100 static char *dump_type_str(enum dump_type type)
101 {
102 switch (type) {
103 case DUMP_TYPE_NONE:
104 return DUMP_NONE_STR;
105 case DUMP_TYPE_CCW:
106 return DUMP_CCW_STR;
107 case DUMP_TYPE_FCP:
108 return DUMP_FCP_STR;
109 default:
110 return NULL;
111 }
112 }
113
114 /*
115 * Must be in data section since the bss section
116 * is not cleared when these are accessed.
117 */
118 static u16 ipl_devno __attribute__((__section__(".data"))) = 0;
119 u32 ipl_flags __attribute__((__section__(".data"))) = 0;
120
121 enum ipl_method {
122 REIPL_METHOD_CCW_CIO,
123 REIPL_METHOD_CCW_DIAG,
124 REIPL_METHOD_CCW_VM,
125 REIPL_METHOD_FCP_RO_DIAG,
126 REIPL_METHOD_FCP_RW_DIAG,
127 REIPL_METHOD_FCP_RO_VM,
128 REIPL_METHOD_FCP_DUMP,
129 REIPL_METHOD_NSS,
130 REIPL_METHOD_NSS_DIAG,
131 REIPL_METHOD_DEFAULT,
132 };
133
134 enum dump_method {
135 DUMP_METHOD_NONE,
136 DUMP_METHOD_CCW_CIO,
137 DUMP_METHOD_CCW_DIAG,
138 DUMP_METHOD_CCW_VM,
139 DUMP_METHOD_FCP_DIAG,
140 };
141
142 static int diag308_set_works = 0;
143
144 static struct ipl_parameter_block ipl_block;
145
146 static int reipl_capabilities = IPL_TYPE_UNKNOWN;
147
148 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
149 static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
150 static struct ipl_parameter_block *reipl_block_fcp;
151 static struct ipl_parameter_block *reipl_block_ccw;
152 static struct ipl_parameter_block *reipl_block_nss;
153 static struct ipl_parameter_block *reipl_block_actual;
154
155 static int dump_capabilities = DUMP_TYPE_NONE;
156 static enum dump_type dump_type = DUMP_TYPE_NONE;
157 static enum dump_method dump_method = DUMP_METHOD_NONE;
158 static struct ipl_parameter_block *dump_block_fcp;
159 static struct ipl_parameter_block *dump_block_ccw;
160
161 static struct sclp_ipl_info sclp_ipl_info;
162
163 int diag308(unsigned long subcode, void *addr)
164 {
165 register unsigned long _addr asm("0") = (unsigned long) addr;
166 register unsigned long _rc asm("1") = 0;
167
168 asm volatile(
169 " diag %0,%2,0x308\n"
170 "0:\n"
171 EX_TABLE(0b,0b)
172 : "+d" (_addr), "+d" (_rc)
173 : "d" (subcode) : "cc", "memory");
174 return _rc;
175 }
176 EXPORT_SYMBOL_GPL(diag308);
177
178 /* SYSFS */
179
180 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
181 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
182 struct kobj_attribute *attr, \
183 char *page) \
184 { \
185 return sprintf(page, _format, _value); \
186 } \
187 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
188 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL);
189
190 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
191 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
192 struct kobj_attribute *attr, \
193 char *page) \
194 { \
195 return sprintf(page, _fmt_out, \
196 (unsigned long long) _value); \
197 } \
198 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
199 struct kobj_attribute *attr, \
200 const char *buf, size_t len) \
201 { \
202 unsigned long long value; \
203 if (sscanf(buf, _fmt_in, &value) != 1) \
204 return -EINVAL; \
205 _value = value; \
206 return len; \
207 } \
208 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
209 __ATTR(_name,(S_IRUGO | S_IWUSR), \
210 sys_##_prefix##_##_name##_show, \
211 sys_##_prefix##_##_name##_store);
212
213 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
214 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
215 struct kobj_attribute *attr, \
216 char *page) \
217 { \
218 return sprintf(page, _fmt_out, _value); \
219 } \
220 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
221 struct kobj_attribute *attr, \
222 const char *buf, size_t len) \
223 { \
224 strncpy(_value, buf, sizeof(_value) - 1); \
225 strim(_value); \
226 return len; \
227 } \
228 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
229 __ATTR(_name,(S_IRUGO | S_IWUSR), \
230 sys_##_prefix##_##_name##_show, \
231 sys_##_prefix##_##_name##_store);
232
233 static void make_attrs_ro(struct attribute **attrs)
234 {
235 while (*attrs) {
236 (*attrs)->mode = S_IRUGO;
237 attrs++;
238 }
239 }
240
241 /*
242 * ipl section
243 */
244
245 static __init enum ipl_type get_ipl_type(void)
246 {
247 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
248
249 if (ipl_flags & IPL_NSS_VALID)
250 return IPL_TYPE_NSS;
251 if (!(ipl_flags & IPL_DEVNO_VALID))
252 return IPL_TYPE_UNKNOWN;
253 if (!(ipl_flags & IPL_PARMBLOCK_VALID))
254 return IPL_TYPE_CCW;
255 if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
256 return IPL_TYPE_UNKNOWN;
257 if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
258 return IPL_TYPE_UNKNOWN;
259 if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
260 return IPL_TYPE_FCP_DUMP;
261 return IPL_TYPE_FCP;
262 }
263
264 struct ipl_info ipl_info;
265 EXPORT_SYMBOL_GPL(ipl_info);
266
267 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
268 char *page)
269 {
270 return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
271 }
272
273 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
274
275 /* VM IPL PARM routines */
276 size_t reipl_get_ascii_vmparm(char *dest, size_t size,
277 const struct ipl_parameter_block *ipb)
278 {
279 int i;
280 size_t len;
281 char has_lowercase = 0;
282
283 len = 0;
284 if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
285 (ipb->ipl_info.ccw.vm_parm_len > 0)) {
286
287 len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
288 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
289 /* If at least one character is lowercase, we assume mixed
290 * case; otherwise we convert everything to lowercase.
291 */
292 for (i = 0; i < len; i++)
293 if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
294 (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
295 (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
296 has_lowercase = 1;
297 break;
298 }
299 if (!has_lowercase)
300 EBC_TOLOWER(dest, len);
301 EBCASC(dest, len);
302 }
303 dest[len] = 0;
304
305 return len;
306 }
307
308 size_t append_ipl_vmparm(char *dest, size_t size)
309 {
310 size_t rc;
311
312 rc = 0;
313 if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
314 rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
315 else
316 dest[0] = 0;
317 return rc;
318 }
319
320 static ssize_t ipl_vm_parm_show(struct kobject *kobj,
321 struct kobj_attribute *attr, char *page)
322 {
323 char parm[DIAG308_VMPARM_SIZE + 1] = {};
324
325 append_ipl_vmparm(parm, sizeof(parm));
326 return sprintf(page, "%s\n", parm);
327 }
328
329 static size_t scpdata_length(const char* buf, size_t count)
330 {
331 while (count) {
332 if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
333 break;
334 count--;
335 }
336 return count;
337 }
338
339 size_t reipl_append_ascii_scpdata(char *dest, size_t size,
340 const struct ipl_parameter_block *ipb)
341 {
342 size_t count;
343 size_t i;
344 int has_lowercase;
345
346 count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data,
347 ipb->ipl_info.fcp.scp_data_len));
348 if (!count)
349 goto out;
350
351 has_lowercase = 0;
352 for (i = 0; i < count; i++) {
353 if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
354 count = 0;
355 goto out;
356 }
357 if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
358 has_lowercase = 1;
359 }
360
361 if (has_lowercase)
362 memcpy(dest, ipb->ipl_info.fcp.scp_data, count);
363 else
364 for (i = 0; i < count; i++)
365 dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]);
366 out:
367 dest[count] = '\0';
368 return count;
369 }
370
371 size_t append_ipl_scpdata(char *dest, size_t len)
372 {
373 size_t rc;
374
375 rc = 0;
376 if (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP)
377 rc = reipl_append_ascii_scpdata(dest, len, &ipl_block);
378 else
379 dest[0] = 0;
380 return rc;
381 }
382
383
384 static struct kobj_attribute sys_ipl_vm_parm_attr =
385 __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
386
387 static ssize_t sys_ipl_device_show(struct kobject *kobj,
388 struct kobj_attribute *attr, char *page)
389 {
390 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
391
392 switch (ipl_info.type) {
393 case IPL_TYPE_CCW:
394 return sprintf(page, "0.0.%04x\n", ipl_devno);
395 case IPL_TYPE_FCP:
396 case IPL_TYPE_FCP_DUMP:
397 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
398 default:
399 return 0;
400 }
401 }
402
403 static struct kobj_attribute sys_ipl_device_attr =
404 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
405
406 static ssize_t ipl_parameter_read(struct kobject *kobj, struct bin_attribute *attr,
407 char *buf, loff_t off, size_t count)
408 {
409 return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START,
410 IPL_PARMBLOCK_SIZE);
411 }
412
413 static struct bin_attribute ipl_parameter_attr = {
414 .attr = {
415 .name = "binary_parameter",
416 .mode = S_IRUGO,
417 },
418 .size = PAGE_SIZE,
419 .read = &ipl_parameter_read,
420 };
421
422 static ssize_t ipl_scp_data_read(struct kobject *kobj, struct bin_attribute *attr,
423 char *buf, loff_t off, size_t count)
424 {
425 unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
426 void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
427
428 return memory_read_from_buffer(buf, count, &off, scp_data, size);
429 }
430
431 static struct bin_attribute ipl_scp_data_attr = {
432 .attr = {
433 .name = "scp_data",
434 .mode = S_IRUGO,
435 },
436 .size = PAGE_SIZE,
437 .read = ipl_scp_data_read,
438 };
439
440 /* FCP ipl device attributes */
441
442 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
443 IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
444 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
445 IPL_PARMBLOCK_START->ipl_info.fcp.lun);
446 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
447 IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
448 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
449 IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
450
451 static struct attribute *ipl_fcp_attrs[] = {
452 &sys_ipl_type_attr.attr,
453 &sys_ipl_device_attr.attr,
454 &sys_ipl_fcp_wwpn_attr.attr,
455 &sys_ipl_fcp_lun_attr.attr,
456 &sys_ipl_fcp_bootprog_attr.attr,
457 &sys_ipl_fcp_br_lba_attr.attr,
458 NULL,
459 };
460
461 static struct attribute_group ipl_fcp_attr_group = {
462 .attrs = ipl_fcp_attrs,
463 };
464
465 /* CCW ipl device attributes */
466
467 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
468 struct kobj_attribute *attr, char *page)
469 {
470 char loadparm[LOADPARM_LEN + 1] = {};
471
472 if (!sclp_ipl_info.is_valid)
473 return sprintf(page, "#unknown#\n");
474 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
475 EBCASC(loadparm, LOADPARM_LEN);
476 strim(loadparm);
477 return sprintf(page, "%s\n", loadparm);
478 }
479
480 static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
481 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
482
483 static struct attribute *ipl_ccw_attrs_vm[] = {
484 &sys_ipl_type_attr.attr,
485 &sys_ipl_device_attr.attr,
486 &sys_ipl_ccw_loadparm_attr.attr,
487 &sys_ipl_vm_parm_attr.attr,
488 NULL,
489 };
490
491 static struct attribute *ipl_ccw_attrs_lpar[] = {
492 &sys_ipl_type_attr.attr,
493 &sys_ipl_device_attr.attr,
494 &sys_ipl_ccw_loadparm_attr.attr,
495 NULL,
496 };
497
498 static struct attribute_group ipl_ccw_attr_group_vm = {
499 .attrs = ipl_ccw_attrs_vm,
500 };
501
502 static struct attribute_group ipl_ccw_attr_group_lpar = {
503 .attrs = ipl_ccw_attrs_lpar
504 };
505
506 /* NSS ipl device attributes */
507
508 DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
509
510 static struct attribute *ipl_nss_attrs[] = {
511 &sys_ipl_type_attr.attr,
512 &sys_ipl_nss_name_attr.attr,
513 &sys_ipl_ccw_loadparm_attr.attr,
514 &sys_ipl_vm_parm_attr.attr,
515 NULL,
516 };
517
518 static struct attribute_group ipl_nss_attr_group = {
519 .attrs = ipl_nss_attrs,
520 };
521
522 /* UNKNOWN ipl device attributes */
523
524 static struct attribute *ipl_unknown_attrs[] = {
525 &sys_ipl_type_attr.attr,
526 NULL,
527 };
528
529 static struct attribute_group ipl_unknown_attr_group = {
530 .attrs = ipl_unknown_attrs,
531 };
532
533 static struct kset *ipl_kset;
534
535 static int __init ipl_register_fcp_files(void)
536 {
537 int rc;
538
539 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
540 if (rc)
541 goto out;
542 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
543 if (rc)
544 goto out_ipl_parm;
545 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_scp_data_attr);
546 if (!rc)
547 goto out;
548
549 sysfs_remove_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
550
551 out_ipl_parm:
552 sysfs_remove_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
553 out:
554 return rc;
555 }
556
557 static void __ipl_run(void *unused)
558 {
559 diag308(DIAG308_IPL, NULL);
560 if (MACHINE_IS_VM)
561 __cpcmd("IPL", NULL, 0, NULL);
562 else if (ipl_info.type == IPL_TYPE_CCW)
563 reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
564 }
565
566 static void ipl_run(struct shutdown_trigger *trigger)
567 {
568 smp_switch_to_ipl_cpu(__ipl_run, NULL);
569 }
570
571 static int __init ipl_init(void)
572 {
573 int rc;
574
575 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
576 if (!ipl_kset) {
577 rc = -ENOMEM;
578 goto out;
579 }
580 switch (ipl_info.type) {
581 case IPL_TYPE_CCW:
582 if (MACHINE_IS_VM)
583 rc = sysfs_create_group(&ipl_kset->kobj,
584 &ipl_ccw_attr_group_vm);
585 else
586 rc = sysfs_create_group(&ipl_kset->kobj,
587 &ipl_ccw_attr_group_lpar);
588 break;
589 case IPL_TYPE_FCP:
590 case IPL_TYPE_FCP_DUMP:
591 rc = ipl_register_fcp_files();
592 break;
593 case IPL_TYPE_NSS:
594 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group);
595 break;
596 default:
597 rc = sysfs_create_group(&ipl_kset->kobj,
598 &ipl_unknown_attr_group);
599 break;
600 }
601 out:
602 if (rc)
603 panic("ipl_init failed: rc = %i\n", rc);
604
605 return 0;
606 }
607
608 static struct shutdown_action __refdata ipl_action = {
609 .name = SHUTDOWN_ACTION_IPL_STR,
610 .fn = ipl_run,
611 .init = ipl_init,
612 };
613
614 /*
615 * reipl shutdown action: Reboot Linux on shutdown.
616 */
617
618 /* VM IPL PARM attributes */
619 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
620 char *page)
621 {
622 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
623
624 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
625 return sprintf(page, "%s\n", vmparm);
626 }
627
628 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
629 size_t vmparm_max,
630 const char *buf, size_t len)
631 {
632 int i, ip_len;
633
634 /* ignore trailing newline */
635 ip_len = len;
636 if ((len > 0) && (buf[len - 1] == '\n'))
637 ip_len--;
638
639 if (ip_len > vmparm_max)
640 return -EINVAL;
641
642 /* parm is used to store kernel options, check for common chars */
643 for (i = 0; i < ip_len; i++)
644 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
645 return -EINVAL;
646
647 memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
648 ipb->ipl_info.ccw.vm_parm_len = ip_len;
649 if (ip_len > 0) {
650 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
651 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
652 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
653 } else {
654 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
655 }
656
657 return len;
658 }
659
660 /* NSS wrapper */
661 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
662 struct kobj_attribute *attr, char *page)
663 {
664 return reipl_generic_vmparm_show(reipl_block_nss, page);
665 }
666
667 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
668 struct kobj_attribute *attr,
669 const char *buf, size_t len)
670 {
671 return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
672 }
673
674 /* CCW wrapper */
675 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
676 struct kobj_attribute *attr, char *page)
677 {
678 return reipl_generic_vmparm_show(reipl_block_ccw, page);
679 }
680
681 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
682 struct kobj_attribute *attr,
683 const char *buf, size_t len)
684 {
685 return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
686 }
687
688 static struct kobj_attribute sys_reipl_nss_vmparm_attr =
689 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
690 reipl_nss_vmparm_store);
691 static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
692 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
693 reipl_ccw_vmparm_store);
694
695 /* FCP reipl device attributes */
696
697 static ssize_t reipl_fcp_scpdata_read(struct kobject *kobj,
698 struct bin_attribute *attr,
699 char *buf, loff_t off, size_t count)
700 {
701 size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
702 void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
703
704 return memory_read_from_buffer(buf, count, &off, scp_data, size);
705 }
706
707 static ssize_t reipl_fcp_scpdata_write(struct kobject *kobj,
708 struct bin_attribute *attr,
709 char *buf, loff_t off, size_t count)
710 {
711 size_t padding;
712 size_t scpdata_len;
713
714 if (off < 0)
715 return -EINVAL;
716
717 if (off >= DIAG308_SCPDATA_SIZE)
718 return -ENOSPC;
719
720 if (count > DIAG308_SCPDATA_SIZE - off)
721 count = DIAG308_SCPDATA_SIZE - off;
722
723 memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf + off, count);
724 scpdata_len = off + count;
725
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
740 static struct bin_attribute sys_reipl_fcp_scp_data_attr = {
741 .attr = {
742 .name = "scp_data",
743 .mode = S_IRUGO | S_IWUSR,
744 },
745 .size = PAGE_SIZE,
746 .read = reipl_fcp_scpdata_read,
747 .write = reipl_fcp_scpdata_write,
748 };
749
750 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n",
751 reipl_block_fcp->ipl_info.fcp.wwpn);
752 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n",
753 reipl_block_fcp->ipl_info.fcp.lun);
754 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
755 reipl_block_fcp->ipl_info.fcp.bootprog);
756 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
757 reipl_block_fcp->ipl_info.fcp.br_lba);
758 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
759 reipl_block_fcp->ipl_info.fcp.devno);
760
761 static struct attribute *reipl_fcp_attrs[] = {
762 &sys_reipl_fcp_device_attr.attr,
763 &sys_reipl_fcp_wwpn_attr.attr,
764 &sys_reipl_fcp_lun_attr.attr,
765 &sys_reipl_fcp_bootprog_attr.attr,
766 &sys_reipl_fcp_br_lba_attr.attr,
767 NULL,
768 };
769
770 static struct attribute_group reipl_fcp_attr_group = {
771 .attrs = reipl_fcp_attrs,
772 };
773
774 /* CCW reipl device attributes */
775
776 DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
777 reipl_block_ccw->ipl_info.ccw.devno);
778
779 static void reipl_get_ascii_loadparm(char *loadparm,
780 struct ipl_parameter_block *ibp)
781 {
782 memcpy(loadparm, ibp->ipl_info.ccw.load_parm, LOADPARM_LEN);
783 EBCASC(loadparm, LOADPARM_LEN);
784 loadparm[LOADPARM_LEN] = 0;
785 strim(loadparm);
786 }
787
788 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
789 char *page)
790 {
791 char buf[LOADPARM_LEN + 1];
792
793 reipl_get_ascii_loadparm(buf, ipb);
794 return sprintf(page, "%s\n", buf);
795 }
796
797 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
798 const char *buf, size_t len)
799 {
800 int i, lp_len;
801
802 /* ignore trailing newline */
803 lp_len = len;
804 if ((len > 0) && (buf[len - 1] == '\n'))
805 lp_len--;
806 /* loadparm can have max 8 characters and must not start with a blank */
807 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
808 return -EINVAL;
809 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
810 for (i = 0; i < lp_len; i++) {
811 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
812 (buf[i] == '.'))
813 continue;
814 return -EINVAL;
815 }
816 /* initialize loadparm with blanks */
817 memset(ipb->ipl_info.ccw.load_parm, ' ', LOADPARM_LEN);
818 /* copy and convert to ebcdic */
819 memcpy(ipb->ipl_info.ccw.load_parm, buf, lp_len);
820 ASCEBC(ipb->ipl_info.ccw.load_parm, LOADPARM_LEN);
821 return len;
822 }
823
824 /* NSS wrapper */
825 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
826 struct kobj_attribute *attr, char *page)
827 {
828 return reipl_generic_loadparm_show(reipl_block_nss, page);
829 }
830
831 static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
832 struct kobj_attribute *attr,
833 const char *buf, size_t len)
834 {
835 return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
836 }
837
838 /* CCW wrapper */
839 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
840 struct kobj_attribute *attr, char *page)
841 {
842 return reipl_generic_loadparm_show(reipl_block_ccw, page);
843 }
844
845 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
846 struct kobj_attribute *attr,
847 const char *buf, size_t len)
848 {
849 return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
850 }
851
852 static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
853 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
854 reipl_ccw_loadparm_store);
855
856 static struct attribute *reipl_ccw_attrs_vm[] = {
857 &sys_reipl_ccw_device_attr.attr,
858 &sys_reipl_ccw_loadparm_attr.attr,
859 &sys_reipl_ccw_vmparm_attr.attr,
860 NULL,
861 };
862
863 static struct attribute *reipl_ccw_attrs_lpar[] = {
864 &sys_reipl_ccw_device_attr.attr,
865 &sys_reipl_ccw_loadparm_attr.attr,
866 NULL,
867 };
868
869 static struct attribute_group reipl_ccw_attr_group_vm = {
870 .name = IPL_CCW_STR,
871 .attrs = reipl_ccw_attrs_vm,
872 };
873
874 static struct attribute_group reipl_ccw_attr_group_lpar = {
875 .name = IPL_CCW_STR,
876 .attrs = reipl_ccw_attrs_lpar,
877 };
878
879
880 /* NSS reipl device attributes */
881 static void reipl_get_ascii_nss_name(char *dst,
882 struct ipl_parameter_block *ipb)
883 {
884 memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
885 EBCASC(dst, NSS_NAME_SIZE);
886 dst[NSS_NAME_SIZE] = 0;
887 }
888
889 static ssize_t reipl_nss_name_show(struct kobject *kobj,
890 struct kobj_attribute *attr, char *page)
891 {
892 char nss_name[NSS_NAME_SIZE + 1] = {};
893
894 reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
895 return sprintf(page, "%s\n", nss_name);
896 }
897
898 static ssize_t reipl_nss_name_store(struct kobject *kobj,
899 struct kobj_attribute *attr,
900 const char *buf, size_t len)
901 {
902 int nss_len;
903
904 /* ignore trailing newline */
905 nss_len = len;
906 if ((len > 0) && (buf[len - 1] == '\n'))
907 nss_len--;
908
909 if (nss_len > NSS_NAME_SIZE)
910 return -EINVAL;
911
912 memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
913 if (nss_len > 0) {
914 reipl_block_nss->ipl_info.ccw.vm_flags |=
915 DIAG308_VM_FLAGS_NSS_VALID;
916 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
917 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
918 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
919 } else {
920 reipl_block_nss->ipl_info.ccw.vm_flags &=
921 ~DIAG308_VM_FLAGS_NSS_VALID;
922 }
923
924 return len;
925 }
926
927 static struct kobj_attribute sys_reipl_nss_name_attr =
928 __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
929 reipl_nss_name_store);
930
931 static struct kobj_attribute sys_reipl_nss_loadparm_attr =
932 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
933 reipl_nss_loadparm_store);
934
935 static struct attribute *reipl_nss_attrs[] = {
936 &sys_reipl_nss_name_attr.attr,
937 &sys_reipl_nss_loadparm_attr.attr,
938 &sys_reipl_nss_vmparm_attr.attr,
939 NULL,
940 };
941
942 static struct attribute_group reipl_nss_attr_group = {
943 .name = IPL_NSS_STR,
944 .attrs = reipl_nss_attrs,
945 };
946
947 /* reipl type */
948
949 static int reipl_set_type(enum ipl_type type)
950 {
951 if (!(reipl_capabilities & type))
952 return -EINVAL;
953
954 switch(type) {
955 case IPL_TYPE_CCW:
956 if (diag308_set_works)
957 reipl_method = REIPL_METHOD_CCW_DIAG;
958 else if (MACHINE_IS_VM)
959 reipl_method = REIPL_METHOD_CCW_VM;
960 else
961 reipl_method = REIPL_METHOD_CCW_CIO;
962 reipl_block_actual = reipl_block_ccw;
963 break;
964 case IPL_TYPE_FCP:
965 if (diag308_set_works)
966 reipl_method = REIPL_METHOD_FCP_RW_DIAG;
967 else if (MACHINE_IS_VM)
968 reipl_method = REIPL_METHOD_FCP_RO_VM;
969 else
970 reipl_method = REIPL_METHOD_FCP_RO_DIAG;
971 reipl_block_actual = reipl_block_fcp;
972 break;
973 case IPL_TYPE_FCP_DUMP:
974 reipl_method = REIPL_METHOD_FCP_DUMP;
975 break;
976 case IPL_TYPE_NSS:
977 if (diag308_set_works)
978 reipl_method = REIPL_METHOD_NSS_DIAG;
979 else
980 reipl_method = REIPL_METHOD_NSS;
981 reipl_block_actual = reipl_block_nss;
982 break;
983 case IPL_TYPE_UNKNOWN:
984 reipl_method = REIPL_METHOD_DEFAULT;
985 break;
986 default:
987 BUG();
988 }
989 reipl_type = type;
990 return 0;
991 }
992
993 static ssize_t reipl_type_show(struct kobject *kobj,
994 struct kobj_attribute *attr, char *page)
995 {
996 return sprintf(page, "%s\n", ipl_type_str(reipl_type));
997 }
998
999 static ssize_t reipl_type_store(struct kobject *kobj,
1000 struct kobj_attribute *attr,
1001 const char *buf, size_t len)
1002 {
1003 int rc = -EINVAL;
1004
1005 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1006 rc = reipl_set_type(IPL_TYPE_CCW);
1007 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1008 rc = reipl_set_type(IPL_TYPE_FCP);
1009 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1010 rc = reipl_set_type(IPL_TYPE_NSS);
1011 return (rc != 0) ? rc : len;
1012 }
1013
1014 static struct kobj_attribute reipl_type_attr =
1015 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
1016
1017 static struct kset *reipl_kset;
1018 static struct kset *reipl_fcp_kset;
1019
1020 static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
1021 const enum ipl_method m)
1022 {
1023 char loadparm[LOADPARM_LEN + 1] = {};
1024 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
1025 char nss_name[NSS_NAME_SIZE + 1] = {};
1026 size_t pos = 0;
1027
1028 reipl_get_ascii_loadparm(loadparm, ipb);
1029 reipl_get_ascii_nss_name(nss_name, ipb);
1030 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
1031
1032 switch (m) {
1033 case REIPL_METHOD_CCW_VM:
1034 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
1035 break;
1036 case REIPL_METHOD_NSS:
1037 pos = sprintf(dst, "IPL %s", nss_name);
1038 break;
1039 default:
1040 break;
1041 }
1042 if (strlen(loadparm) > 0)
1043 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
1044 if (strlen(vmparm) > 0)
1045 sprintf(dst + pos, " PARM %s", vmparm);
1046 }
1047
1048 static void __reipl_run(void *unused)
1049 {
1050 struct ccw_dev_id devid;
1051 static char buf[128];
1052
1053 switch (reipl_method) {
1054 case REIPL_METHOD_CCW_CIO:
1055 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
1056 devid.ssid = 0;
1057 reipl_ccw_dev(&devid);
1058 break;
1059 case REIPL_METHOD_CCW_VM:
1060 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
1061 __cpcmd(buf, NULL, 0, NULL);
1062 break;
1063 case REIPL_METHOD_CCW_DIAG:
1064 diag308(DIAG308_SET, reipl_block_ccw);
1065 diag308(DIAG308_IPL, NULL);
1066 break;
1067 case REIPL_METHOD_FCP_RW_DIAG:
1068 diag308(DIAG308_SET, reipl_block_fcp);
1069 diag308(DIAG308_IPL, NULL);
1070 break;
1071 case REIPL_METHOD_FCP_RO_DIAG:
1072 diag308(DIAG308_IPL, NULL);
1073 break;
1074 case REIPL_METHOD_FCP_RO_VM:
1075 __cpcmd("IPL", NULL, 0, NULL);
1076 break;
1077 case REIPL_METHOD_NSS_DIAG:
1078 diag308(DIAG308_SET, reipl_block_nss);
1079 diag308(DIAG308_IPL, NULL);
1080 break;
1081 case REIPL_METHOD_NSS:
1082 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
1083 __cpcmd(buf, NULL, 0, NULL);
1084 break;
1085 case REIPL_METHOD_DEFAULT:
1086 if (MACHINE_IS_VM)
1087 __cpcmd("IPL", NULL, 0, NULL);
1088 diag308(DIAG308_IPL, NULL);
1089 break;
1090 case REIPL_METHOD_FCP_DUMP:
1091 break;
1092 }
1093 disabled_wait((unsigned long) __builtin_return_address(0));
1094 }
1095
1096 static void reipl_run(struct shutdown_trigger *trigger)
1097 {
1098 smp_switch_to_ipl_cpu(__reipl_run, NULL);
1099 }
1100
1101 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
1102 {
1103 ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
1104 ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1105 ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1106 ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1107 }
1108
1109 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1110 {
1111 /* LOADPARM */
1112 /* check if read scp info worked and set loadparm */
1113 if (sclp_ipl_info.is_valid)
1114 memcpy(ipb->ipl_info.ccw.load_parm,
1115 &sclp_ipl_info.loadparm, LOADPARM_LEN);
1116 else
1117 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1118 memset(ipb->ipl_info.ccw.load_parm, 0x40, LOADPARM_LEN);
1119 ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
1120
1121 /* VM PARM */
1122 if (MACHINE_IS_VM && diag308_set_works &&
1123 (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1124
1125 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1126 ipb->ipl_info.ccw.vm_parm_len =
1127 ipl_block.ipl_info.ccw.vm_parm_len;
1128 memcpy(ipb->ipl_info.ccw.vm_parm,
1129 ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1130 }
1131 }
1132
1133 static int __init reipl_nss_init(void)
1134 {
1135 int rc;
1136
1137 if (!MACHINE_IS_VM)
1138 return 0;
1139
1140 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1141 if (!reipl_block_nss)
1142 return -ENOMEM;
1143
1144 if (!diag308_set_works)
1145 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO;
1146
1147 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1148 if (rc)
1149 return rc;
1150
1151 reipl_block_ccw_init(reipl_block_nss);
1152 if (ipl_info.type == IPL_TYPE_NSS) {
1153 memset(reipl_block_nss->ipl_info.ccw.nss_name,
1154 ' ', NSS_NAME_SIZE);
1155 memcpy(reipl_block_nss->ipl_info.ccw.nss_name,
1156 kernel_nss_name, strlen(kernel_nss_name));
1157 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
1158 reipl_block_nss->ipl_info.ccw.vm_flags |=
1159 DIAG308_VM_FLAGS_NSS_VALID;
1160
1161 reipl_block_ccw_fill_parms(reipl_block_nss);
1162 }
1163
1164 reipl_capabilities |= IPL_TYPE_NSS;
1165 return 0;
1166 }
1167
1168 static int __init reipl_ccw_init(void)
1169 {
1170 int rc;
1171
1172 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1173 if (!reipl_block_ccw)
1174 return -ENOMEM;
1175
1176 if (MACHINE_IS_VM) {
1177 if (!diag308_set_works)
1178 sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
1179 rc = sysfs_create_group(&reipl_kset->kobj,
1180 &reipl_ccw_attr_group_vm);
1181 } else {
1182 if(!diag308_set_works)
1183 sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
1184 rc = sysfs_create_group(&reipl_kset->kobj,
1185 &reipl_ccw_attr_group_lpar);
1186 }
1187 if (rc)
1188 return rc;
1189
1190 reipl_block_ccw_init(reipl_block_ccw);
1191 if (ipl_info.type == IPL_TYPE_CCW) {
1192 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
1193 reipl_block_ccw_fill_parms(reipl_block_ccw);
1194 }
1195
1196 reipl_capabilities |= IPL_TYPE_CCW;
1197 return 0;
1198 }
1199
1200 static int __init reipl_fcp_init(void)
1201 {
1202 int rc;
1203
1204 if (!diag308_set_works) {
1205 if (ipl_info.type == IPL_TYPE_FCP) {
1206 make_attrs_ro(reipl_fcp_attrs);
1207 sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO;
1208 } else
1209 return 0;
1210 }
1211
1212 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1213 if (!reipl_block_fcp)
1214 return -ENOMEM;
1215
1216 /* sysfs: create fcp kset for mixing attr group and bin attrs */
1217 reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1218 &reipl_kset->kobj);
1219 if (!reipl_kset) {
1220 free_page((unsigned long) reipl_block_fcp);
1221 return -ENOMEM;
1222 }
1223
1224 rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1225 if (rc) {
1226 kset_unregister(reipl_fcp_kset);
1227 free_page((unsigned long) reipl_block_fcp);
1228 return rc;
1229 }
1230
1231 rc = sysfs_create_bin_file(&reipl_fcp_kset->kobj,
1232 &sys_reipl_fcp_scp_data_attr);
1233 if (rc) {
1234 sysfs_remove_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1235 kset_unregister(reipl_fcp_kset);
1236 free_page((unsigned long) reipl_block_fcp);
1237 return rc;
1238 }
1239
1240 if (ipl_info.type == IPL_TYPE_FCP)
1241 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
1242 else {
1243 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1244 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1245 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1246 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1247 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1248 }
1249 reipl_capabilities |= IPL_TYPE_FCP;
1250 return 0;
1251 }
1252
1253 static int __init reipl_init(void)
1254 {
1255 int rc;
1256
1257 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1258 if (!reipl_kset)
1259 return -ENOMEM;
1260 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1261 if (rc) {
1262 kset_unregister(reipl_kset);
1263 return rc;
1264 }
1265 rc = reipl_ccw_init();
1266 if (rc)
1267 return rc;
1268 rc = reipl_fcp_init();
1269 if (rc)
1270 return rc;
1271 rc = reipl_nss_init();
1272 if (rc)
1273 return rc;
1274 rc = reipl_set_type(ipl_info.type);
1275 if (rc)
1276 return rc;
1277 return 0;
1278 }
1279
1280 static struct shutdown_action __refdata reipl_action = {
1281 .name = SHUTDOWN_ACTION_REIPL_STR,
1282 .fn = reipl_run,
1283 .init = reipl_init,
1284 };
1285
1286 /*
1287 * dump shutdown action: Dump Linux on shutdown.
1288 */
1289
1290 /* FCP dump device attributes */
1291
1292 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n",
1293 dump_block_fcp->ipl_info.fcp.wwpn);
1294 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n",
1295 dump_block_fcp->ipl_info.fcp.lun);
1296 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1297 dump_block_fcp->ipl_info.fcp.bootprog);
1298 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1299 dump_block_fcp->ipl_info.fcp.br_lba);
1300 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1301 dump_block_fcp->ipl_info.fcp.devno);
1302
1303 static struct attribute *dump_fcp_attrs[] = {
1304 &sys_dump_fcp_device_attr.attr,
1305 &sys_dump_fcp_wwpn_attr.attr,
1306 &sys_dump_fcp_lun_attr.attr,
1307 &sys_dump_fcp_bootprog_attr.attr,
1308 &sys_dump_fcp_br_lba_attr.attr,
1309 NULL,
1310 };
1311
1312 static struct attribute_group dump_fcp_attr_group = {
1313 .name = IPL_FCP_STR,
1314 .attrs = dump_fcp_attrs,
1315 };
1316
1317 /* CCW dump device attributes */
1318
1319 DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
1320 dump_block_ccw->ipl_info.ccw.devno);
1321
1322 static struct attribute *dump_ccw_attrs[] = {
1323 &sys_dump_ccw_device_attr.attr,
1324 NULL,
1325 };
1326
1327 static struct attribute_group dump_ccw_attr_group = {
1328 .name = IPL_CCW_STR,
1329 .attrs = dump_ccw_attrs,
1330 };
1331
1332 /* dump type */
1333
1334 static int dump_set_type(enum dump_type type)
1335 {
1336 if (!(dump_capabilities & type))
1337 return -EINVAL;
1338 switch (type) {
1339 case DUMP_TYPE_CCW:
1340 if (diag308_set_works)
1341 dump_method = DUMP_METHOD_CCW_DIAG;
1342 else if (MACHINE_IS_VM)
1343 dump_method = DUMP_METHOD_CCW_VM;
1344 else
1345 dump_method = DUMP_METHOD_CCW_CIO;
1346 break;
1347 case DUMP_TYPE_FCP:
1348 dump_method = DUMP_METHOD_FCP_DIAG;
1349 break;
1350 default:
1351 dump_method = DUMP_METHOD_NONE;
1352 }
1353 dump_type = type;
1354 return 0;
1355 }
1356
1357 static ssize_t dump_type_show(struct kobject *kobj,
1358 struct kobj_attribute *attr, char *page)
1359 {
1360 return sprintf(page, "%s\n", dump_type_str(dump_type));
1361 }
1362
1363 static ssize_t dump_type_store(struct kobject *kobj,
1364 struct kobj_attribute *attr,
1365 const char *buf, size_t len)
1366 {
1367 int rc = -EINVAL;
1368
1369 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1370 rc = dump_set_type(DUMP_TYPE_NONE);
1371 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1372 rc = dump_set_type(DUMP_TYPE_CCW);
1373 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1374 rc = dump_set_type(DUMP_TYPE_FCP);
1375 return (rc != 0) ? rc : len;
1376 }
1377
1378 static struct kobj_attribute dump_type_attr =
1379 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1380
1381 static struct kset *dump_kset;
1382
1383 static void __dump_run(void *unused)
1384 {
1385 struct ccw_dev_id devid;
1386 static char buf[100];
1387
1388 switch (dump_method) {
1389 case DUMP_METHOD_CCW_CIO:
1390 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
1391 devid.ssid = 0;
1392 reipl_ccw_dev(&devid);
1393 break;
1394 case DUMP_METHOD_CCW_VM:
1395 sprintf(buf, "STORE STATUS");
1396 __cpcmd(buf, NULL, 0, NULL);
1397 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
1398 __cpcmd(buf, NULL, 0, NULL);
1399 break;
1400 case DUMP_METHOD_CCW_DIAG:
1401 diag308(DIAG308_SET, dump_block_ccw);
1402 diag308(DIAG308_DUMP, NULL);
1403 break;
1404 case DUMP_METHOD_FCP_DIAG:
1405 diag308(DIAG308_SET, dump_block_fcp);
1406 diag308(DIAG308_DUMP, NULL);
1407 break;
1408 default:
1409 break;
1410 }
1411 }
1412
1413 static void dump_run(struct shutdown_trigger *trigger)
1414 {
1415 if (dump_method == DUMP_METHOD_NONE)
1416 return;
1417 smp_send_stop();
1418 smp_switch_to_ipl_cpu(__dump_run, NULL);
1419 }
1420
1421 static int __init dump_ccw_init(void)
1422 {
1423 int rc;
1424
1425 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1426 if (!dump_block_ccw)
1427 return -ENOMEM;
1428 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1429 if (rc) {
1430 free_page((unsigned long)dump_block_ccw);
1431 return rc;
1432 }
1433 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1434 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1435 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1436 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1437 dump_capabilities |= DUMP_TYPE_CCW;
1438 return 0;
1439 }
1440
1441 static int __init dump_fcp_init(void)
1442 {
1443 int rc;
1444
1445 if (!sclp_ipl_info.has_dump)
1446 return 0; /* LDIPL DUMP is not installed */
1447 if (!diag308_set_works)
1448 return 0;
1449 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1450 if (!dump_block_fcp)
1451 return -ENOMEM;
1452 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1453 if (rc) {
1454 free_page((unsigned long)dump_block_fcp);
1455 return rc;
1456 }
1457 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1458 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1459 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1460 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1461 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1462 dump_capabilities |= DUMP_TYPE_FCP;
1463 return 0;
1464 }
1465
1466 static int __init dump_init(void)
1467 {
1468 int rc;
1469
1470 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1471 if (!dump_kset)
1472 return -ENOMEM;
1473 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1474 if (rc) {
1475 kset_unregister(dump_kset);
1476 return rc;
1477 }
1478 rc = dump_ccw_init();
1479 if (rc)
1480 return rc;
1481 rc = dump_fcp_init();
1482 if (rc)
1483 return rc;
1484 dump_set_type(DUMP_TYPE_NONE);
1485 return 0;
1486 }
1487
1488 static struct shutdown_action __refdata dump_action = {
1489 .name = SHUTDOWN_ACTION_DUMP_STR,
1490 .fn = dump_run,
1491 .init = dump_init,
1492 };
1493
1494 static void dump_reipl_run(struct shutdown_trigger *trigger)
1495 {
1496 preempt_disable();
1497 /*
1498 * Bypass dynamic address translation (DAT) when storing IPL parameter
1499 * information block address and checksum into the prefix area
1500 * (corresponding to absolute addresses 0-8191).
1501 * When enhanced DAT applies and the STE format control in one,
1502 * the absolute address is formed without prefixing. In this case a
1503 * normal store (stg/st) into the prefix area would no more match to
1504 * absolute addresses 0-8191.
1505 */
1506 #ifdef CONFIG_64BIT
1507 asm volatile("sturg %0,%1"
1508 :: "a" ((unsigned long) reipl_block_actual),
1509 "a" (&lowcore_ptr[smp_processor_id()]->ipib));
1510 #else
1511 asm volatile("stura %0,%1"
1512 :: "a" ((unsigned long) reipl_block_actual),
1513 "a" (&lowcore_ptr[smp_processor_id()]->ipib));
1514 #endif
1515 asm volatile("stura %0,%1"
1516 :: "a" (csum_partial(reipl_block_actual,
1517 reipl_block_actual->hdr.len, 0)),
1518 "a" (&lowcore_ptr[smp_processor_id()]->ipib_checksum));
1519 preempt_enable();
1520 dump_run(trigger);
1521 }
1522
1523 static int __init dump_reipl_init(void)
1524 {
1525 if (!diag308_set_works)
1526 return -EOPNOTSUPP;
1527 else
1528 return 0;
1529 }
1530
1531 static struct shutdown_action __refdata dump_reipl_action = {
1532 .name = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1533 .fn = dump_reipl_run,
1534 .init = dump_reipl_init,
1535 };
1536
1537 /*
1538 * vmcmd shutdown action: Trigger vm command on shutdown.
1539 */
1540
1541 static char vmcmd_on_reboot[128];
1542 static char vmcmd_on_panic[128];
1543 static char vmcmd_on_halt[128];
1544 static char vmcmd_on_poff[128];
1545
1546 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1547 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1548 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1549 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1550
1551 static struct attribute *vmcmd_attrs[] = {
1552 &sys_vmcmd_on_reboot_attr.attr,
1553 &sys_vmcmd_on_panic_attr.attr,
1554 &sys_vmcmd_on_halt_attr.attr,
1555 &sys_vmcmd_on_poff_attr.attr,
1556 NULL,
1557 };
1558
1559 static struct attribute_group vmcmd_attr_group = {
1560 .attrs = vmcmd_attrs,
1561 };
1562
1563 static struct kset *vmcmd_kset;
1564
1565 static void vmcmd_run(struct shutdown_trigger *trigger)
1566 {
1567 char *cmd, *next_cmd;
1568
1569 if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1570 cmd = vmcmd_on_reboot;
1571 else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1572 cmd = vmcmd_on_panic;
1573 else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1574 cmd = vmcmd_on_halt;
1575 else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1576 cmd = vmcmd_on_poff;
1577 else
1578 return;
1579
1580 if (strlen(cmd) == 0)
1581 return;
1582 do {
1583 next_cmd = strchr(cmd, '\n');
1584 if (next_cmd) {
1585 next_cmd[0] = 0;
1586 next_cmd += 1;
1587 }
1588 __cpcmd(cmd, NULL, 0, NULL);
1589 cmd = next_cmd;
1590 } while (cmd != NULL);
1591 }
1592
1593 static int vmcmd_init(void)
1594 {
1595 if (!MACHINE_IS_VM)
1596 return -EOPNOTSUPP;
1597 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1598 if (!vmcmd_kset)
1599 return -ENOMEM;
1600 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1601 }
1602
1603 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1604 vmcmd_run, vmcmd_init};
1605
1606 /*
1607 * stop shutdown action: Stop Linux on shutdown.
1608 */
1609
1610 static void stop_run(struct shutdown_trigger *trigger)
1611 {
1612 if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1613 disabled_wait((unsigned long) __builtin_return_address(0));
1614 while (sigp(smp_processor_id(), sigp_stop) == sigp_busy)
1615 cpu_relax();
1616 for (;;);
1617 }
1618
1619 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1620 stop_run, NULL};
1621
1622 /* action list */
1623
1624 static struct shutdown_action *shutdown_actions_list[] = {
1625 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1626 &vmcmd_action, &stop_action};
1627 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1628
1629 /*
1630 * Trigger section
1631 */
1632
1633 static struct kset *shutdown_actions_kset;
1634
1635 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1636 size_t len)
1637 {
1638 int i;
1639
1640 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1641 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1642 if (shutdown_actions_list[i]->init_rc) {
1643 return shutdown_actions_list[i]->init_rc;
1644 } else {
1645 trigger->action = shutdown_actions_list[i];
1646 return len;
1647 }
1648 }
1649 }
1650 return -EINVAL;
1651 }
1652
1653 /* on reipl */
1654
1655 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1656 &reipl_action};
1657
1658 static ssize_t on_reboot_show(struct kobject *kobj,
1659 struct kobj_attribute *attr, char *page)
1660 {
1661 return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1662 }
1663
1664 static ssize_t on_reboot_store(struct kobject *kobj,
1665 struct kobj_attribute *attr,
1666 const char *buf, size_t len)
1667 {
1668 return set_trigger(buf, &on_reboot_trigger, len);
1669 }
1670
1671 static struct kobj_attribute on_reboot_attr =
1672 __ATTR(on_reboot, 0644, on_reboot_show, on_reboot_store);
1673
1674 static void do_machine_restart(char *__unused)
1675 {
1676 smp_send_stop();
1677 on_reboot_trigger.action->fn(&on_reboot_trigger);
1678 reipl_run(NULL);
1679 }
1680 void (*_machine_restart)(char *command) = do_machine_restart;
1681
1682 /* on panic */
1683
1684 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1685
1686 static ssize_t on_panic_show(struct kobject *kobj,
1687 struct kobj_attribute *attr, char *page)
1688 {
1689 return sprintf(page, "%s\n", on_panic_trigger.action->name);
1690 }
1691
1692 static ssize_t on_panic_store(struct kobject *kobj,
1693 struct kobj_attribute *attr,
1694 const char *buf, size_t len)
1695 {
1696 return set_trigger(buf, &on_panic_trigger, len);
1697 }
1698
1699 static struct kobj_attribute on_panic_attr =
1700 __ATTR(on_panic, 0644, on_panic_show, on_panic_store);
1701
1702 static void do_panic(void)
1703 {
1704 on_panic_trigger.action->fn(&on_panic_trigger);
1705 stop_run(&on_panic_trigger);
1706 }
1707
1708 /* on halt */
1709
1710 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1711
1712 static ssize_t on_halt_show(struct kobject *kobj,
1713 struct kobj_attribute *attr, char *page)
1714 {
1715 return sprintf(page, "%s\n", on_halt_trigger.action->name);
1716 }
1717
1718 static ssize_t on_halt_store(struct kobject *kobj,
1719 struct kobj_attribute *attr,
1720 const char *buf, size_t len)
1721 {
1722 return set_trigger(buf, &on_halt_trigger, len);
1723 }
1724
1725 static struct kobj_attribute on_halt_attr =
1726 __ATTR(on_halt, 0644, on_halt_show, on_halt_store);
1727
1728
1729 static void do_machine_halt(void)
1730 {
1731 smp_send_stop();
1732 on_halt_trigger.action->fn(&on_halt_trigger);
1733 stop_run(&on_halt_trigger);
1734 }
1735 void (*_machine_halt)(void) = do_machine_halt;
1736
1737 /* on power off */
1738
1739 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1740
1741 static ssize_t on_poff_show(struct kobject *kobj,
1742 struct kobj_attribute *attr, char *page)
1743 {
1744 return sprintf(page, "%s\n", on_poff_trigger.action->name);
1745 }
1746
1747 static ssize_t on_poff_store(struct kobject *kobj,
1748 struct kobj_attribute *attr,
1749 const char *buf, size_t len)
1750 {
1751 return set_trigger(buf, &on_poff_trigger, len);
1752 }
1753
1754 static struct kobj_attribute on_poff_attr =
1755 __ATTR(on_poff, 0644, on_poff_show, on_poff_store);
1756
1757
1758 static void do_machine_power_off(void)
1759 {
1760 smp_send_stop();
1761 on_poff_trigger.action->fn(&on_poff_trigger);
1762 stop_run(&on_poff_trigger);
1763 }
1764 void (*_machine_power_off)(void) = do_machine_power_off;
1765
1766 static void __init shutdown_triggers_init(void)
1767 {
1768 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1769 firmware_kobj);
1770 if (!shutdown_actions_kset)
1771 goto fail;
1772 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1773 &on_reboot_attr.attr))
1774 goto fail;
1775 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1776 &on_panic_attr.attr))
1777 goto fail;
1778 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1779 &on_halt_attr.attr))
1780 goto fail;
1781 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1782 &on_poff_attr.attr))
1783 goto fail;
1784
1785 return;
1786 fail:
1787 panic("shutdown_triggers_init failed\n");
1788 }
1789
1790 static void __init shutdown_actions_init(void)
1791 {
1792 int i;
1793
1794 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1795 if (!shutdown_actions_list[i]->init)
1796 continue;
1797 shutdown_actions_list[i]->init_rc =
1798 shutdown_actions_list[i]->init();
1799 }
1800 }
1801
1802 static int __init s390_ipl_init(void)
1803 {
1804 sclp_get_ipl_info(&sclp_ipl_info);
1805 shutdown_actions_init();
1806 shutdown_triggers_init();
1807 return 0;
1808 }
1809
1810 __initcall(s390_ipl_init);
1811
1812 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1813 {
1814 int sx, dx;
1815
1816 dx = 0;
1817 for (sx = 0; src[sx] != 0; sx++) {
1818 if (src[sx] == '"')
1819 continue;
1820 dst[dx++] = src[sx];
1821 if (dx >= n)
1822 break;
1823 }
1824 }
1825
1826 static int __init vmcmd_on_reboot_setup(char *str)
1827 {
1828 if (!MACHINE_IS_VM)
1829 return 1;
1830 strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1831 vmcmd_on_reboot[127] = 0;
1832 on_reboot_trigger.action = &vmcmd_action;
1833 return 1;
1834 }
1835 __setup("vmreboot=", vmcmd_on_reboot_setup);
1836
1837 static int __init vmcmd_on_panic_setup(char *str)
1838 {
1839 if (!MACHINE_IS_VM)
1840 return 1;
1841 strncpy_skip_quote(vmcmd_on_panic, str, 127);
1842 vmcmd_on_panic[127] = 0;
1843 on_panic_trigger.action = &vmcmd_action;
1844 return 1;
1845 }
1846 __setup("vmpanic=", vmcmd_on_panic_setup);
1847
1848 static int __init vmcmd_on_halt_setup(char *str)
1849 {
1850 if (!MACHINE_IS_VM)
1851 return 1;
1852 strncpy_skip_quote(vmcmd_on_halt, str, 127);
1853 vmcmd_on_halt[127] = 0;
1854 on_halt_trigger.action = &vmcmd_action;
1855 return 1;
1856 }
1857 __setup("vmhalt=", vmcmd_on_halt_setup);
1858
1859 static int __init vmcmd_on_poff_setup(char *str)
1860 {
1861 if (!MACHINE_IS_VM)
1862 return 1;
1863 strncpy_skip_quote(vmcmd_on_poff, str, 127);
1864 vmcmd_on_poff[127] = 0;
1865 on_poff_trigger.action = &vmcmd_action;
1866 return 1;
1867 }
1868 __setup("vmpoff=", vmcmd_on_poff_setup);
1869
1870 static int on_panic_notify(struct notifier_block *self,
1871 unsigned long event, void *data)
1872 {
1873 do_panic();
1874 return NOTIFY_OK;
1875 }
1876
1877 static struct notifier_block on_panic_nb = {
1878 .notifier_call = on_panic_notify,
1879 .priority = INT_MIN,
1880 };
1881
1882 void __init setup_ipl(void)
1883 {
1884 ipl_info.type = get_ipl_type();
1885 switch (ipl_info.type) {
1886 case IPL_TYPE_CCW:
1887 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1888 ipl_info.data.ccw.dev_id.ssid = 0;
1889 break;
1890 case IPL_TYPE_FCP:
1891 case IPL_TYPE_FCP_DUMP:
1892 ipl_info.data.fcp.dev_id.devno =
1893 IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1894 ipl_info.data.fcp.dev_id.ssid = 0;
1895 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1896 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1897 break;
1898 case IPL_TYPE_NSS:
1899 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1900 sizeof(ipl_info.data.nss.name));
1901 break;
1902 case IPL_TYPE_UNKNOWN:
1903 /* We have no info to copy */
1904 break;
1905 }
1906 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1907 }
1908
1909 void __init ipl_update_parameters(void)
1910 {
1911 int rc;
1912
1913 rc = diag308(DIAG308_STORE, &ipl_block);
1914 if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
1915 diag308_set_works = 1;
1916 }
1917
1918 void __init ipl_save_parameters(void)
1919 {
1920 struct cio_iplinfo iplinfo;
1921 void *src, *dst;
1922
1923 if (cio_get_iplinfo(&iplinfo))
1924 return;
1925
1926 ipl_devno = iplinfo.devno;
1927 ipl_flags |= IPL_DEVNO_VALID;
1928 if (!iplinfo.is_qdio)
1929 return;
1930 ipl_flags |= IPL_PARMBLOCK_VALID;
1931 src = (void *)(unsigned long)S390_lowcore.ipl_parmblock_ptr;
1932 dst = (void *)IPL_PARMBLOCK_ORIGIN;
1933 memmove(dst, src, PAGE_SIZE);
1934 S390_lowcore.ipl_parmblock_ptr = IPL_PARMBLOCK_ORIGIN;
1935 }
1936
1937 static LIST_HEAD(rcall);
1938 static DEFINE_MUTEX(rcall_mutex);
1939
1940 void register_reset_call(struct reset_call *reset)
1941 {
1942 mutex_lock(&rcall_mutex);
1943 list_add(&reset->list, &rcall);
1944 mutex_unlock(&rcall_mutex);
1945 }
1946 EXPORT_SYMBOL_GPL(register_reset_call);
1947
1948 void unregister_reset_call(struct reset_call *reset)
1949 {
1950 mutex_lock(&rcall_mutex);
1951 list_del(&reset->list);
1952 mutex_unlock(&rcall_mutex);
1953 }
1954 EXPORT_SYMBOL_GPL(unregister_reset_call);
1955
1956 static void do_reset_calls(void)
1957 {
1958 struct reset_call *reset;
1959
1960 list_for_each_entry(reset, &rcall, list)
1961 reset->fn();
1962 }
1963
1964 u32 dump_prefix_page;
1965
1966 void s390_reset_system(void)
1967 {
1968 struct _lowcore *lc;
1969
1970 lc = (struct _lowcore *)(unsigned long) store_prefix();
1971
1972 /* Stack for interrupt/machine check handler */
1973 lc->panic_stack = S390_lowcore.panic_stack;
1974
1975 /* Save prefix page address for dump case */
1976 dump_prefix_page = (u32)(unsigned long) lc;
1977
1978 /* Disable prefixing */
1979 set_prefix(0);
1980
1981 /* Disable lowcore protection */
1982 __ctl_clear_bit(0,28);
1983
1984 /* Set new machine check handler */
1985 S390_lowcore.mcck_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
1986 S390_lowcore.mcck_new_psw.addr =
1987 PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;
1988
1989 /* Set new program check handler */
1990 S390_lowcore.program_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
1991 S390_lowcore.program_new_psw.addr =
1992 PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
1993
1994 do_reset_calls();
1995 }
1996
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