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ARM: cpu topology: Add debugfs interface for cpu_power
[cmplus.git] / arch / s390 / kernel / ipl.c
bloba689070be287371040881afcc71b712122672a1e
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 file *filp, struct kobject *kobj,
407 struct bin_attribute *attr, char *buf,
408 loff_t off, size_t count)
409 {
410 return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START,
411 IPL_PARMBLOCK_SIZE);
412 }
413
414 static struct bin_attribute ipl_parameter_attr = {
415 .attr = {
416 .name = "binary_parameter",
417 .mode = S_IRUGO,
418 },
419 .size = PAGE_SIZE,
420 .read = &ipl_parameter_read,
421 };
422
423 static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
424 struct bin_attribute *attr, char *buf,
425 loff_t off, size_t count)
426 {
427 unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
428 void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
429
430 return memory_read_from_buffer(buf, count, &off, scp_data, size);
431 }
432
433 static struct bin_attribute ipl_scp_data_attr = {
434 .attr = {
435 .name = "scp_data",
436 .mode = S_IRUGO,
437 },
438 .size = PAGE_SIZE,
439 .read = ipl_scp_data_read,
440 };
441
442 /* FCP ipl device attributes */
443
444 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
445 IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
446 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
447 IPL_PARMBLOCK_START->ipl_info.fcp.lun);
448 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
449 IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
450 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
451 IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
452
453 static struct attribute *ipl_fcp_attrs[] = {
454 &sys_ipl_type_attr.attr,
455 &sys_ipl_device_attr.attr,
456 &sys_ipl_fcp_wwpn_attr.attr,
457 &sys_ipl_fcp_lun_attr.attr,
458 &sys_ipl_fcp_bootprog_attr.attr,
459 &sys_ipl_fcp_br_lba_attr.attr,
460 NULL,
461 };
462
463 static struct attribute_group ipl_fcp_attr_group = {
464 .attrs = ipl_fcp_attrs,
465 };
466
467 /* CCW ipl device attributes */
468
469 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
470 struct kobj_attribute *attr, char *page)
471 {
472 char loadparm[LOADPARM_LEN + 1] = {};
473
474 if (!sclp_ipl_info.is_valid)
475 return sprintf(page, "#unknown#\n");
476 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
477 EBCASC(loadparm, LOADPARM_LEN);
478 strim(loadparm);
479 return sprintf(page, "%s\n", loadparm);
480 }
481
482 static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
483 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
484
485 static struct attribute *ipl_ccw_attrs_vm[] = {
486 &sys_ipl_type_attr.attr,
487 &sys_ipl_device_attr.attr,
488 &sys_ipl_ccw_loadparm_attr.attr,
489 &sys_ipl_vm_parm_attr.attr,
490 NULL,
491 };
492
493 static struct attribute *ipl_ccw_attrs_lpar[] = {
494 &sys_ipl_type_attr.attr,
495 &sys_ipl_device_attr.attr,
496 &sys_ipl_ccw_loadparm_attr.attr,
497 NULL,
498 };
499
500 static struct attribute_group ipl_ccw_attr_group_vm = {
501 .attrs = ipl_ccw_attrs_vm,
502 };
503
504 static struct attribute_group ipl_ccw_attr_group_lpar = {
505 .attrs = ipl_ccw_attrs_lpar
506 };
507
508 /* NSS ipl device attributes */
509
510 DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
511
512 static struct attribute *ipl_nss_attrs[] = {
513 &sys_ipl_type_attr.attr,
514 &sys_ipl_nss_name_attr.attr,
515 &sys_ipl_ccw_loadparm_attr.attr,
516 &sys_ipl_vm_parm_attr.attr,
517 NULL,
518 };
519
520 static struct attribute_group ipl_nss_attr_group = {
521 .attrs = ipl_nss_attrs,
522 };
523
524 /* UNKNOWN ipl device attributes */
525
526 static struct attribute *ipl_unknown_attrs[] = {
527 &sys_ipl_type_attr.attr,
528 NULL,
529 };
530
531 static struct attribute_group ipl_unknown_attr_group = {
532 .attrs = ipl_unknown_attrs,
533 };
534
535 static struct kset *ipl_kset;
536
537 static int __init ipl_register_fcp_files(void)
538 {
539 int rc;
540
541 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
542 if (rc)
543 goto out;
544 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
545 if (rc)
546 goto out_ipl_parm;
547 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_scp_data_attr);
548 if (!rc)
549 goto out;
550
551 sysfs_remove_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
552
553 out_ipl_parm:
554 sysfs_remove_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
555 out:
556 return rc;
557 }
558
559 static void __ipl_run(void *unused)
560 {
561 diag308(DIAG308_IPL, NULL);
562 if (MACHINE_IS_VM)
563 __cpcmd("IPL", NULL, 0, NULL);
564 else if (ipl_info.type == IPL_TYPE_CCW)
565 reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
566 }
567
568 static void ipl_run(struct shutdown_trigger *trigger)
569 {
570 smp_switch_to_ipl_cpu(__ipl_run, NULL);
571 }
572
573 static int __init ipl_init(void)
574 {
575 int rc;
576
577 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
578 if (!ipl_kset) {
579 rc = -ENOMEM;
580 goto out;
581 }
582 switch (ipl_info.type) {
583 case IPL_TYPE_CCW:
584 if (MACHINE_IS_VM)
585 rc = sysfs_create_group(&ipl_kset->kobj,
586 &ipl_ccw_attr_group_vm);
587 else
588 rc = sysfs_create_group(&ipl_kset->kobj,
589 &ipl_ccw_attr_group_lpar);
590 break;
591 case IPL_TYPE_FCP:
592 case IPL_TYPE_FCP_DUMP:
593 rc = ipl_register_fcp_files();
594 break;
595 case IPL_TYPE_NSS:
596 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group);
597 break;
598 default:
599 rc = sysfs_create_group(&ipl_kset->kobj,
600 &ipl_unknown_attr_group);
601 break;
602 }
603 out:
604 if (rc)
605 panic("ipl_init failed: rc = %i\n", rc);
606
607 return 0;
608 }
609
610 static struct shutdown_action __refdata ipl_action = {
611 .name = SHUTDOWN_ACTION_IPL_STR,
612 .fn = ipl_run,
613 .init = ipl_init,
614 };
615
616 /*
617 * reipl shutdown action: Reboot Linux on shutdown.
618 */
619
620 /* VM IPL PARM attributes */
621 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
622 char *page)
623 {
624 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
625
626 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
627 return sprintf(page, "%s\n", vmparm);
628 }
629
630 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
631 size_t vmparm_max,
632 const char *buf, size_t len)
633 {
634 int i, ip_len;
635
636 /* ignore trailing newline */
637 ip_len = len;
638 if ((len > 0) && (buf[len - 1] == '\n'))
639 ip_len--;
640
641 if (ip_len > vmparm_max)
642 return -EINVAL;
643
644 /* parm is used to store kernel options, check for common chars */
645 for (i = 0; i < ip_len; i++)
646 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
647 return -EINVAL;
648
649 memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
650 ipb->ipl_info.ccw.vm_parm_len = ip_len;
651 if (ip_len > 0) {
652 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
653 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
654 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
655 } else {
656 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
657 }
658
659 return len;
660 }
661
662 /* NSS wrapper */
663 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
664 struct kobj_attribute *attr, char *page)
665 {
666 return reipl_generic_vmparm_show(reipl_block_nss, page);
667 }
668
669 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
670 struct kobj_attribute *attr,
671 const char *buf, size_t len)
672 {
673 return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
674 }
675
676 /* CCW wrapper */
677 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
678 struct kobj_attribute *attr, char *page)
679 {
680 return reipl_generic_vmparm_show(reipl_block_ccw, page);
681 }
682
683 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
684 struct kobj_attribute *attr,
685 const char *buf, size_t len)
686 {
687 return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
688 }
689
690 static struct kobj_attribute sys_reipl_nss_vmparm_attr =
691 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
692 reipl_nss_vmparm_store);
693 static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
694 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
695 reipl_ccw_vmparm_store);
696
697 /* FCP reipl device attributes */
698
699 static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
700 struct bin_attribute *attr,
701 char *buf, loff_t off, size_t count)
702 {
703 size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
704 void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
705
706 return memory_read_from_buffer(buf, count, &off, scp_data, size);
707 }
708
709 static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
710 struct bin_attribute *attr,
711 char *buf, loff_t off, size_t count)
712 {
713 size_t padding;
714 size_t scpdata_len;
715
716 if (off < 0)
717 return -EINVAL;
718
719 if (off >= DIAG308_SCPDATA_SIZE)
720 return -ENOSPC;
721
722 if (count > DIAG308_SCPDATA_SIZE - off)
723 count = DIAG308_SCPDATA_SIZE - off;
724
725 memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf + off, count);
726 scpdata_len = off + count;
727
728 if (scpdata_len % 8) {
729 padding = 8 - (scpdata_len % 8);
730 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
731 0, padding);
732 scpdata_len += padding;
733 }
734
735 reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
736 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
737 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
738
739 return count;
740 }
741
742 static struct bin_attribute sys_reipl_fcp_scp_data_attr = {
743 .attr = {
744 .name = "scp_data",
745 .mode = S_IRUGO | S_IWUSR,
746 },
747 .size = PAGE_SIZE,
748 .read = reipl_fcp_scpdata_read,
749 .write = reipl_fcp_scpdata_write,
750 };
751
752 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n",
753 reipl_block_fcp->ipl_info.fcp.wwpn);
754 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n",
755 reipl_block_fcp->ipl_info.fcp.lun);
756 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
757 reipl_block_fcp->ipl_info.fcp.bootprog);
758 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
759 reipl_block_fcp->ipl_info.fcp.br_lba);
760 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
761 reipl_block_fcp->ipl_info.fcp.devno);
762
763 static struct attribute *reipl_fcp_attrs[] = {
764 &sys_reipl_fcp_device_attr.attr,
765 &sys_reipl_fcp_wwpn_attr.attr,
766 &sys_reipl_fcp_lun_attr.attr,
767 &sys_reipl_fcp_bootprog_attr.attr,
768 &sys_reipl_fcp_br_lba_attr.attr,
769 NULL,
770 };
771
772 static struct attribute_group reipl_fcp_attr_group = {
773 .attrs = reipl_fcp_attrs,
774 };
775
776 /* CCW reipl device attributes */
777
778 DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
779 reipl_block_ccw->ipl_info.ccw.devno);
780
781 static void reipl_get_ascii_loadparm(char *loadparm,
782 struct ipl_parameter_block *ibp)
783 {
784 memcpy(loadparm, ibp->ipl_info.ccw.load_parm, LOADPARM_LEN);
785 EBCASC(loadparm, LOADPARM_LEN);
786 loadparm[LOADPARM_LEN] = 0;
787 strim(loadparm);
788 }
789
790 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
791 char *page)
792 {
793 char buf[LOADPARM_LEN + 1];
794
795 reipl_get_ascii_loadparm(buf, ipb);
796 return sprintf(page, "%s\n", buf);
797 }
798
799 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
800 const char *buf, size_t len)
801 {
802 int i, lp_len;
803
804 /* ignore trailing newline */
805 lp_len = len;
806 if ((len > 0) && (buf[len - 1] == '\n'))
807 lp_len--;
808 /* loadparm can have max 8 characters and must not start with a blank */
809 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
810 return -EINVAL;
811 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
812 for (i = 0; i < lp_len; i++) {
813 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
814 (buf[i] == '.'))
815 continue;
816 return -EINVAL;
817 }
818 /* initialize loadparm with blanks */
819 memset(ipb->ipl_info.ccw.load_parm, ' ', LOADPARM_LEN);
820 /* copy and convert to ebcdic */
821 memcpy(ipb->ipl_info.ccw.load_parm, buf, lp_len);
822 ASCEBC(ipb->ipl_info.ccw.load_parm, LOADPARM_LEN);
823 return len;
824 }
825
826 /* NSS wrapper */
827 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
828 struct kobj_attribute *attr, char *page)
829 {
830 return reipl_generic_loadparm_show(reipl_block_nss, page);
831 }
832
833 static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
834 struct kobj_attribute *attr,
835 const char *buf, size_t len)
836 {
837 return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
838 }
839
840 /* CCW wrapper */
841 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
842 struct kobj_attribute *attr, char *page)
843 {
844 return reipl_generic_loadparm_show(reipl_block_ccw, page);
845 }
846
847 static ssize_t reipl_ccw_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_ccw, buf, len);
852 }
853
854 static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
855 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
856 reipl_ccw_loadparm_store);
857
858 static struct attribute *reipl_ccw_attrs_vm[] = {
859 &sys_reipl_ccw_device_attr.attr,
860 &sys_reipl_ccw_loadparm_attr.attr,
861 &sys_reipl_ccw_vmparm_attr.attr,
862 NULL,
863 };
864
865 static struct attribute *reipl_ccw_attrs_lpar[] = {
866 &sys_reipl_ccw_device_attr.attr,
867 &sys_reipl_ccw_loadparm_attr.attr,
868 NULL,
869 };
870
871 static struct attribute_group reipl_ccw_attr_group_vm = {
872 .name = IPL_CCW_STR,
873 .attrs = reipl_ccw_attrs_vm,
874 };
875
876 static struct attribute_group reipl_ccw_attr_group_lpar = {
877 .name = IPL_CCW_STR,
878 .attrs = reipl_ccw_attrs_lpar,
879 };
880
881
882 /* NSS reipl device attributes */
883 static void reipl_get_ascii_nss_name(char *dst,
884 struct ipl_parameter_block *ipb)
885 {
886 memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
887 EBCASC(dst, NSS_NAME_SIZE);
888 dst[NSS_NAME_SIZE] = 0;
889 }
890
891 static ssize_t reipl_nss_name_show(struct kobject *kobj,
892 struct kobj_attribute *attr, char *page)
893 {
894 char nss_name[NSS_NAME_SIZE + 1] = {};
895
896 reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
897 return sprintf(page, "%s\n", nss_name);
898 }
899
900 static ssize_t reipl_nss_name_store(struct kobject *kobj,
901 struct kobj_attribute *attr,
902 const char *buf, size_t len)
903 {
904 int nss_len;
905
906 /* ignore trailing newline */
907 nss_len = len;
908 if ((len > 0) && (buf[len - 1] == '\n'))
909 nss_len--;
910
911 if (nss_len > NSS_NAME_SIZE)
912 return -EINVAL;
913
914 memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
915 if (nss_len > 0) {
916 reipl_block_nss->ipl_info.ccw.vm_flags |=
917 DIAG308_VM_FLAGS_NSS_VALID;
918 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
919 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
920 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
921 } else {
922 reipl_block_nss->ipl_info.ccw.vm_flags &=
923 ~DIAG308_VM_FLAGS_NSS_VALID;
924 }
925
926 return len;
927 }
928
929 static struct kobj_attribute sys_reipl_nss_name_attr =
930 __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
931 reipl_nss_name_store);
932
933 static struct kobj_attribute sys_reipl_nss_loadparm_attr =
934 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
935 reipl_nss_loadparm_store);
936
937 static struct attribute *reipl_nss_attrs[] = {
938 &sys_reipl_nss_name_attr.attr,
939 &sys_reipl_nss_loadparm_attr.attr,
940 &sys_reipl_nss_vmparm_attr.attr,
941 NULL,
942 };
943
944 static struct attribute_group reipl_nss_attr_group = {
945 .name = IPL_NSS_STR,
946 .attrs = reipl_nss_attrs,
947 };
948
949 /* reipl type */
950
951 static int reipl_set_type(enum ipl_type type)
952 {
953 if (!(reipl_capabilities & type))
954 return -EINVAL;
955
956 switch(type) {
957 case IPL_TYPE_CCW:
958 if (diag308_set_works)
959 reipl_method = REIPL_METHOD_CCW_DIAG;
960 else if (MACHINE_IS_VM)
961 reipl_method = REIPL_METHOD_CCW_VM;
962 else
963 reipl_method = REIPL_METHOD_CCW_CIO;
964 reipl_block_actual = reipl_block_ccw;
965 break;
966 case IPL_TYPE_FCP:
967 if (diag308_set_works)
968 reipl_method = REIPL_METHOD_FCP_RW_DIAG;
969 else if (MACHINE_IS_VM)
970 reipl_method = REIPL_METHOD_FCP_RO_VM;
971 else
972 reipl_method = REIPL_METHOD_FCP_RO_DIAG;
973 reipl_block_actual = reipl_block_fcp;
974 break;
975 case IPL_TYPE_FCP_DUMP:
976 reipl_method = REIPL_METHOD_FCP_DUMP;
977 break;
978 case IPL_TYPE_NSS:
979 if (diag308_set_works)
980 reipl_method = REIPL_METHOD_NSS_DIAG;
981 else
982 reipl_method = REIPL_METHOD_NSS;
983 reipl_block_actual = reipl_block_nss;
984 break;
985 case IPL_TYPE_UNKNOWN:
986 reipl_method = REIPL_METHOD_DEFAULT;
987 break;
988 default:
989 BUG();
990 }
991 reipl_type = type;
992 return 0;
993 }
994
995 static ssize_t reipl_type_show(struct kobject *kobj,
996 struct kobj_attribute *attr, char *page)
997 {
998 return sprintf(page, "%s\n", ipl_type_str(reipl_type));
999 }
1000
1001 static ssize_t reipl_type_store(struct kobject *kobj,
1002 struct kobj_attribute *attr,
1003 const char *buf, size_t len)
1004 {
1005 int rc = -EINVAL;
1006
1007 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1008 rc = reipl_set_type(IPL_TYPE_CCW);
1009 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1010 rc = reipl_set_type(IPL_TYPE_FCP);
1011 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1012 rc = reipl_set_type(IPL_TYPE_NSS);
1013 return (rc != 0) ? rc : len;
1014 }
1015
1016 static struct kobj_attribute reipl_type_attr =
1017 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
1018
1019 static struct kset *reipl_kset;
1020 static struct kset *reipl_fcp_kset;
1021
1022 static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
1023 const enum ipl_method m)
1024 {
1025 char loadparm[LOADPARM_LEN + 1] = {};
1026 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
1027 char nss_name[NSS_NAME_SIZE + 1] = {};
1028 size_t pos = 0;
1029
1030 reipl_get_ascii_loadparm(loadparm, ipb);
1031 reipl_get_ascii_nss_name(nss_name, ipb);
1032 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
1033
1034 switch (m) {
1035 case REIPL_METHOD_CCW_VM:
1036 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
1037 break;
1038 case REIPL_METHOD_NSS:
1039 pos = sprintf(dst, "IPL %s", nss_name);
1040 break;
1041 default:
1042 break;
1043 }
1044 if (strlen(loadparm) > 0)
1045 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
1046 if (strlen(vmparm) > 0)
1047 sprintf(dst + pos, " PARM %s", vmparm);
1048 }
1049
1050 static void __reipl_run(void *unused)
1051 {
1052 struct ccw_dev_id devid;
1053 static char buf[128];
1054
1055 switch (reipl_method) {
1056 case REIPL_METHOD_CCW_CIO:
1057 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
1058 devid.ssid = 0;
1059 reipl_ccw_dev(&devid);
1060 break;
1061 case REIPL_METHOD_CCW_VM:
1062 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
1063 __cpcmd(buf, NULL, 0, NULL);
1064 break;
1065 case REIPL_METHOD_CCW_DIAG:
1066 diag308(DIAG308_SET, reipl_block_ccw);
1067 diag308(DIAG308_IPL, NULL);
1068 break;
1069 case REIPL_METHOD_FCP_RW_DIAG:
1070 diag308(DIAG308_SET, reipl_block_fcp);
1071 diag308(DIAG308_IPL, NULL);
1072 break;
1073 case REIPL_METHOD_FCP_RO_DIAG:
1074 diag308(DIAG308_IPL, NULL);
1075 break;
1076 case REIPL_METHOD_FCP_RO_VM:
1077 __cpcmd("IPL", NULL, 0, NULL);
1078 break;
1079 case REIPL_METHOD_NSS_DIAG:
1080 diag308(DIAG308_SET, reipl_block_nss);
1081 diag308(DIAG308_IPL, NULL);
1082 break;
1083 case REIPL_METHOD_NSS:
1084 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
1085 __cpcmd(buf, NULL, 0, NULL);
1086 break;
1087 case REIPL_METHOD_DEFAULT:
1088 if (MACHINE_IS_VM)
1089 __cpcmd("IPL", NULL, 0, NULL);
1090 diag308(DIAG308_IPL, NULL);
1091 break;
1092 case REIPL_METHOD_FCP_DUMP:
1093 break;
1094 }
1095 disabled_wait((unsigned long) __builtin_return_address(0));
1096 }
1097
1098 static void reipl_run(struct shutdown_trigger *trigger)
1099 {
1100 smp_switch_to_ipl_cpu(__reipl_run, NULL);
1101 }
1102
1103 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
1104 {
1105 ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
1106 ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1107 ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1108 ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1109 }
1110
1111 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1112 {
1113 /* LOADPARM */
1114 /* check if read scp info worked and set loadparm */
1115 if (sclp_ipl_info.is_valid)
1116 memcpy(ipb->ipl_info.ccw.load_parm,
1117 &sclp_ipl_info.loadparm, LOADPARM_LEN);
1118 else
1119 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1120 memset(ipb->ipl_info.ccw.load_parm, 0x40, LOADPARM_LEN);
1121 ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
1122
1123 /* VM PARM */
1124 if (MACHINE_IS_VM && diag308_set_works &&
1125 (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1126
1127 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1128 ipb->ipl_info.ccw.vm_parm_len =
1129 ipl_block.ipl_info.ccw.vm_parm_len;
1130 memcpy(ipb->ipl_info.ccw.vm_parm,
1131 ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1132 }
1133 }
1134
1135 static int __init reipl_nss_init(void)
1136 {
1137 int rc;
1138
1139 if (!MACHINE_IS_VM)
1140 return 0;
1141
1142 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1143 if (!reipl_block_nss)
1144 return -ENOMEM;
1145
1146 if (!diag308_set_works)
1147 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO;
1148
1149 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1150 if (rc)
1151 return rc;
1152
1153 reipl_block_ccw_init(reipl_block_nss);
1154 if (ipl_info.type == IPL_TYPE_NSS) {
1155 memset(reipl_block_nss->ipl_info.ccw.nss_name,
1156 ' ', NSS_NAME_SIZE);
1157 memcpy(reipl_block_nss->ipl_info.ccw.nss_name,
1158 kernel_nss_name, strlen(kernel_nss_name));
1159 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
1160 reipl_block_nss->ipl_info.ccw.vm_flags |=
1161 DIAG308_VM_FLAGS_NSS_VALID;
1162
1163 reipl_block_ccw_fill_parms(reipl_block_nss);
1164 }
1165
1166 reipl_capabilities |= IPL_TYPE_NSS;
1167 return 0;
1168 }
1169
1170 static int __init reipl_ccw_init(void)
1171 {
1172 int rc;
1173
1174 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1175 if (!reipl_block_ccw)
1176 return -ENOMEM;
1177
1178 if (MACHINE_IS_VM) {
1179 if (!diag308_set_works)
1180 sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
1181 rc = sysfs_create_group(&reipl_kset->kobj,
1182 &reipl_ccw_attr_group_vm);
1183 } else {
1184 if(!diag308_set_works)
1185 sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
1186 rc = sysfs_create_group(&reipl_kset->kobj,
1187 &reipl_ccw_attr_group_lpar);
1188 }
1189 if (rc)
1190 return rc;
1191
1192 reipl_block_ccw_init(reipl_block_ccw);
1193 if (ipl_info.type == IPL_TYPE_CCW) {
1194 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
1195 reipl_block_ccw_fill_parms(reipl_block_ccw);
1196 }
1197
1198 reipl_capabilities |= IPL_TYPE_CCW;
1199 return 0;
1200 }
1201
1202 static int __init reipl_fcp_init(void)
1203 {
1204 int rc;
1205
1206 if (!diag308_set_works) {
1207 if (ipl_info.type == IPL_TYPE_FCP) {
1208 make_attrs_ro(reipl_fcp_attrs);
1209 sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO;
1210 } else
1211 return 0;
1212 }
1213
1214 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1215 if (!reipl_block_fcp)
1216 return -ENOMEM;
1217
1218 /* sysfs: create fcp kset for mixing attr group and bin attrs */
1219 reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1220 &reipl_kset->kobj);
1221 if (!reipl_kset) {
1222 free_page((unsigned long) reipl_block_fcp);
1223 return -ENOMEM;
1224 }
1225
1226 rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1227 if (rc) {
1228 kset_unregister(reipl_fcp_kset);
1229 free_page((unsigned long) reipl_block_fcp);
1230 return rc;
1231 }
1232
1233 rc = sysfs_create_bin_file(&reipl_fcp_kset->kobj,
1234 &sys_reipl_fcp_scp_data_attr);
1235 if (rc) {
1236 sysfs_remove_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1237 kset_unregister(reipl_fcp_kset);
1238 free_page((unsigned long) reipl_block_fcp);
1239 return rc;
1240 }
1241
1242 if (ipl_info.type == IPL_TYPE_FCP)
1243 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
1244 else {
1245 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1246 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1247 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1248 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1249 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1250 }
1251 reipl_capabilities |= IPL_TYPE_FCP;
1252 return 0;
1253 }
1254
1255 static int __init reipl_init(void)
1256 {
1257 int rc;
1258
1259 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1260 if (!reipl_kset)
1261 return -ENOMEM;
1262 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1263 if (rc) {
1264 kset_unregister(reipl_kset);
1265 return rc;
1266 }
1267 rc = reipl_ccw_init();
1268 if (rc)
1269 return rc;
1270 rc = reipl_fcp_init();
1271 if (rc)
1272 return rc;
1273 rc = reipl_nss_init();
1274 if (rc)
1275 return rc;
1276 rc = reipl_set_type(ipl_info.type);
1277 if (rc)
1278 return rc;
1279 return 0;
1280 }
1281
1282 static struct shutdown_action __refdata reipl_action = {
1283 .name = SHUTDOWN_ACTION_REIPL_STR,
1284 .fn = reipl_run,
1285 .init = reipl_init,
1286 };
1287
1288 /*
1289 * dump shutdown action: Dump Linux on shutdown.
1290 */
1291
1292 /* FCP dump device attributes */
1293
1294 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n",
1295 dump_block_fcp->ipl_info.fcp.wwpn);
1296 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n",
1297 dump_block_fcp->ipl_info.fcp.lun);
1298 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1299 dump_block_fcp->ipl_info.fcp.bootprog);
1300 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1301 dump_block_fcp->ipl_info.fcp.br_lba);
1302 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1303 dump_block_fcp->ipl_info.fcp.devno);
1304
1305 static struct attribute *dump_fcp_attrs[] = {
1306 &sys_dump_fcp_device_attr.attr,
1307 &sys_dump_fcp_wwpn_attr.attr,
1308 &sys_dump_fcp_lun_attr.attr,
1309 &sys_dump_fcp_bootprog_attr.attr,
1310 &sys_dump_fcp_br_lba_attr.attr,
1311 NULL,
1312 };
1313
1314 static struct attribute_group dump_fcp_attr_group = {
1315 .name = IPL_FCP_STR,
1316 .attrs = dump_fcp_attrs,
1317 };
1318
1319 /* CCW dump device attributes */
1320
1321 DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
1322 dump_block_ccw->ipl_info.ccw.devno);
1323
1324 static struct attribute *dump_ccw_attrs[] = {
1325 &sys_dump_ccw_device_attr.attr,
1326 NULL,
1327 };
1328
1329 static struct attribute_group dump_ccw_attr_group = {
1330 .name = IPL_CCW_STR,
1331 .attrs = dump_ccw_attrs,
1332 };
1333
1334 /* dump type */
1335
1336 static int dump_set_type(enum dump_type type)
1337 {
1338 if (!(dump_capabilities & type))
1339 return -EINVAL;
1340 switch (type) {
1341 case DUMP_TYPE_CCW:
1342 if (diag308_set_works)
1343 dump_method = DUMP_METHOD_CCW_DIAG;
1344 else if (MACHINE_IS_VM)
1345 dump_method = DUMP_METHOD_CCW_VM;
1346 else
1347 dump_method = DUMP_METHOD_CCW_CIO;
1348 break;
1349 case DUMP_TYPE_FCP:
1350 dump_method = DUMP_METHOD_FCP_DIAG;
1351 break;
1352 default:
1353 dump_method = DUMP_METHOD_NONE;
1354 }
1355 dump_type = type;
1356 return 0;
1357 }
1358
1359 static ssize_t dump_type_show(struct kobject *kobj,
1360 struct kobj_attribute *attr, char *page)
1361 {
1362 return sprintf(page, "%s\n", dump_type_str(dump_type));
1363 }
1364
1365 static ssize_t dump_type_store(struct kobject *kobj,
1366 struct kobj_attribute *attr,
1367 const char *buf, size_t len)
1368 {
1369 int rc = -EINVAL;
1370
1371 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1372 rc = dump_set_type(DUMP_TYPE_NONE);
1373 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1374 rc = dump_set_type(DUMP_TYPE_CCW);
1375 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1376 rc = dump_set_type(DUMP_TYPE_FCP);
1377 return (rc != 0) ? rc : len;
1378 }
1379
1380 static struct kobj_attribute dump_type_attr =
1381 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1382
1383 static struct kset *dump_kset;
1384
1385 static void __dump_run(void *unused)
1386 {
1387 struct ccw_dev_id devid;
1388 static char buf[100];
1389
1390 switch (dump_method) {
1391 case DUMP_METHOD_CCW_CIO:
1392 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
1393 devid.ssid = 0;
1394 reipl_ccw_dev(&devid);
1395 break;
1396 case DUMP_METHOD_CCW_VM:
1397 sprintf(buf, "STORE STATUS");
1398 __cpcmd(buf, NULL, 0, NULL);
1399 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
1400 __cpcmd(buf, NULL, 0, NULL);
1401 break;
1402 case DUMP_METHOD_CCW_DIAG:
1403 diag308(DIAG308_SET, dump_block_ccw);
1404 diag308(DIAG308_DUMP, NULL);
1405 break;
1406 case DUMP_METHOD_FCP_DIAG:
1407 diag308(DIAG308_SET, dump_block_fcp);
1408 diag308(DIAG308_DUMP, NULL);
1409 break;
1410 default:
1411 break;
1412 }
1413 }
1414
1415 static void dump_run(struct shutdown_trigger *trigger)
1416 {
1417 if (dump_method == DUMP_METHOD_NONE)
1418 return;
1419 smp_send_stop();
1420 smp_switch_to_ipl_cpu(__dump_run, NULL);
1421 }
1422
1423 static int __init dump_ccw_init(void)
1424 {
1425 int rc;
1426
1427 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1428 if (!dump_block_ccw)
1429 return -ENOMEM;
1430 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1431 if (rc) {
1432 free_page((unsigned long)dump_block_ccw);
1433 return rc;
1434 }
1435 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1436 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1437 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1438 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1439 dump_capabilities |= DUMP_TYPE_CCW;
1440 return 0;
1441 }
1442
1443 static int __init dump_fcp_init(void)
1444 {
1445 int rc;
1446
1447 if (!sclp_ipl_info.has_dump)
1448 return 0; /* LDIPL DUMP is not installed */
1449 if (!diag308_set_works)
1450 return 0;
1451 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1452 if (!dump_block_fcp)
1453 return -ENOMEM;
1454 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1455 if (rc) {
1456 free_page((unsigned long)dump_block_fcp);
1457 return rc;
1458 }
1459 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1460 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1461 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1462 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1463 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1464 dump_capabilities |= DUMP_TYPE_FCP;
1465 return 0;
1466 }
1467
1468 static int __init dump_init(void)
1469 {
1470 int rc;
1471
1472 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1473 if (!dump_kset)
1474 return -ENOMEM;
1475 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1476 if (rc) {
1477 kset_unregister(dump_kset);
1478 return rc;
1479 }
1480 rc = dump_ccw_init();
1481 if (rc)
1482 return rc;
1483 rc = dump_fcp_init();
1484 if (rc)
1485 return rc;
1486 dump_set_type(DUMP_TYPE_NONE);
1487 return 0;
1488 }
1489
1490 static struct shutdown_action __refdata dump_action = {
1491 .name = SHUTDOWN_ACTION_DUMP_STR,
1492 .fn = dump_run,
1493 .init = dump_init,
1494 };
1495
1496 static void dump_reipl_run(struct shutdown_trigger *trigger)
1497 {
1498 preempt_disable();
1499 /*
1500 * Bypass dynamic address translation (DAT) when storing IPL parameter
1501 * information block address and checksum into the prefix area
1502 * (corresponding to absolute addresses 0-8191).
1503 * When enhanced DAT applies and the STE format control in one,
1504 * the absolute address is formed without prefixing. In this case a
1505 * normal store (stg/st) into the prefix area would no more match to
1506 * absolute addresses 0-8191.
1507 */
1508 #ifdef CONFIG_64BIT
1509 asm volatile("sturg %0,%1"
1510 :: "a" ((unsigned long) reipl_block_actual),
1511 "a" (&lowcore_ptr[smp_processor_id()]->ipib));
1512 #else
1513 asm volatile("stura %0,%1"
1514 :: "a" ((unsigned long) reipl_block_actual),
1515 "a" (&lowcore_ptr[smp_processor_id()]->ipib));
1516 #endif
1517 asm volatile("stura %0,%1"
1518 :: "a" (csum_partial(reipl_block_actual,
1519 reipl_block_actual->hdr.len, 0)),
1520 "a" (&lowcore_ptr[smp_processor_id()]->ipib_checksum));
1521 preempt_enable();
1522 dump_run(trigger);
1523 }
1524
1525 static int __init dump_reipl_init(void)
1526 {
1527 if (!diag308_set_works)
1528 return -EOPNOTSUPP;
1529 else
1530 return 0;
1531 }
1532
1533 static struct shutdown_action __refdata dump_reipl_action = {
1534 .name = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1535 .fn = dump_reipl_run,
1536 .init = dump_reipl_init,
1537 };
1538
1539 /*
1540 * vmcmd shutdown action: Trigger vm command on shutdown.
1541 */
1542
1543 static char vmcmd_on_reboot[128];
1544 static char vmcmd_on_panic[128];
1545 static char vmcmd_on_halt[128];
1546 static char vmcmd_on_poff[128];
1547
1548 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1549 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1550 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1551 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1552
1553 static struct attribute *vmcmd_attrs[] = {
1554 &sys_vmcmd_on_reboot_attr.attr,
1555 &sys_vmcmd_on_panic_attr.attr,
1556 &sys_vmcmd_on_halt_attr.attr,
1557 &sys_vmcmd_on_poff_attr.attr,
1558 NULL,
1559 };
1560
1561 static struct attribute_group vmcmd_attr_group = {
1562 .attrs = vmcmd_attrs,
1563 };
1564
1565 static struct kset *vmcmd_kset;
1566
1567 static void vmcmd_run(struct shutdown_trigger *trigger)
1568 {
1569 char *cmd, *next_cmd;
1570
1571 if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1572 cmd = vmcmd_on_reboot;
1573 else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1574 cmd = vmcmd_on_panic;
1575 else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1576 cmd = vmcmd_on_halt;
1577 else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1578 cmd = vmcmd_on_poff;
1579 else
1580 return;
1581
1582 if (strlen(cmd) == 0)
1583 return;
1584 do {
1585 next_cmd = strchr(cmd, '\n');
1586 if (next_cmd) {
1587 next_cmd[0] = 0;
1588 next_cmd += 1;
1589 }
1590 __cpcmd(cmd, NULL, 0, NULL);
1591 cmd = next_cmd;
1592 } while (cmd != NULL);
1593 }
1594
1595 static int vmcmd_init(void)
1596 {
1597 if (!MACHINE_IS_VM)
1598 return -EOPNOTSUPP;
1599 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1600 if (!vmcmd_kset)
1601 return -ENOMEM;
1602 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1603 }
1604
1605 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1606 vmcmd_run, vmcmd_init};
1607
1608 /*
1609 * stop shutdown action: Stop Linux on shutdown.
1610 */
1611
1612 static void stop_run(struct shutdown_trigger *trigger)
1613 {
1614 if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1615 disabled_wait((unsigned long) __builtin_return_address(0));
1616 while (sigp(smp_processor_id(), sigp_stop) == sigp_busy)
1617 cpu_relax();
1618 for (;;);
1619 }
1620
1621 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1622 stop_run, NULL};
1623
1624 /* action list */
1625
1626 static struct shutdown_action *shutdown_actions_list[] = {
1627 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1628 &vmcmd_action, &stop_action};
1629 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1630
1631 /*
1632 * Trigger section
1633 */
1634
1635 static struct kset *shutdown_actions_kset;
1636
1637 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1638 size_t len)
1639 {
1640 int i;
1641
1642 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1643 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1644 if (shutdown_actions_list[i]->init_rc) {
1645 return shutdown_actions_list[i]->init_rc;
1646 } else {
1647 trigger->action = shutdown_actions_list[i];
1648 return len;
1649 }
1650 }
1651 }
1652 return -EINVAL;
1653 }
1654
1655 /* on reipl */
1656
1657 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1658 &reipl_action};
1659
1660 static ssize_t on_reboot_show(struct kobject *kobj,
1661 struct kobj_attribute *attr, char *page)
1662 {
1663 return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1664 }
1665
1666 static ssize_t on_reboot_store(struct kobject *kobj,
1667 struct kobj_attribute *attr,
1668 const char *buf, size_t len)
1669 {
1670 return set_trigger(buf, &on_reboot_trigger, len);
1671 }
1672
1673 static struct kobj_attribute on_reboot_attr =
1674 __ATTR(on_reboot, 0644, on_reboot_show, on_reboot_store);
1675
1676 static void do_machine_restart(char *__unused)
1677 {
1678 smp_send_stop();
1679 on_reboot_trigger.action->fn(&on_reboot_trigger);
1680 reipl_run(NULL);
1681 }
1682 void (*_machine_restart)(char *command) = do_machine_restart;
1683
1684 /* on panic */
1685
1686 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1687
1688 static ssize_t on_panic_show(struct kobject *kobj,
1689 struct kobj_attribute *attr, char *page)
1690 {
1691 return sprintf(page, "%s\n", on_panic_trigger.action->name);
1692 }
1693
1694 static ssize_t on_panic_store(struct kobject *kobj,
1695 struct kobj_attribute *attr,
1696 const char *buf, size_t len)
1697 {
1698 return set_trigger(buf, &on_panic_trigger, len);
1699 }
1700
1701 static struct kobj_attribute on_panic_attr =
1702 __ATTR(on_panic, 0644, on_panic_show, on_panic_store);
1703
1704 static void do_panic(void)
1705 {
1706 on_panic_trigger.action->fn(&on_panic_trigger);
1707 stop_run(&on_panic_trigger);
1708 }
1709
1710 /* on halt */
1711
1712 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1713
1714 static ssize_t on_halt_show(struct kobject *kobj,
1715 struct kobj_attribute *attr, char *page)
1716 {
1717 return sprintf(page, "%s\n", on_halt_trigger.action->name);
1718 }
1719
1720 static ssize_t on_halt_store(struct kobject *kobj,
1721 struct kobj_attribute *attr,
1722 const char *buf, size_t len)
1723 {
1724 return set_trigger(buf, &on_halt_trigger, len);
1725 }
1726
1727 static struct kobj_attribute on_halt_attr =
1728 __ATTR(on_halt, 0644, on_halt_show, on_halt_store);
1729
1730
1731 static void do_machine_halt(void)
1732 {
1733 smp_send_stop();
1734 on_halt_trigger.action->fn(&on_halt_trigger);
1735 stop_run(&on_halt_trigger);
1736 }
1737 void (*_machine_halt)(void) = do_machine_halt;
1738
1739 /* on power off */
1740
1741 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1742
1743 static ssize_t on_poff_show(struct kobject *kobj,
1744 struct kobj_attribute *attr, char *page)
1745 {
1746 return sprintf(page, "%s\n", on_poff_trigger.action->name);
1747 }
1748
1749 static ssize_t on_poff_store(struct kobject *kobj,
1750 struct kobj_attribute *attr,
1751 const char *buf, size_t len)
1752 {
1753 return set_trigger(buf, &on_poff_trigger, len);
1754 }
1755
1756 static struct kobj_attribute on_poff_attr =
1757 __ATTR(on_poff, 0644, on_poff_show, on_poff_store);
1758
1759
1760 static void do_machine_power_off(void)
1761 {
1762 smp_send_stop();
1763 on_poff_trigger.action->fn(&on_poff_trigger);
1764 stop_run(&on_poff_trigger);
1765 }
1766 void (*_machine_power_off)(void) = do_machine_power_off;
1767
1768 static void __init shutdown_triggers_init(void)
1769 {
1770 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1771 firmware_kobj);
1772 if (!shutdown_actions_kset)
1773 goto fail;
1774 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1775 &on_reboot_attr.attr))
1776 goto fail;
1777 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1778 &on_panic_attr.attr))
1779 goto fail;
1780 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1781 &on_halt_attr.attr))
1782 goto fail;
1783 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1784 &on_poff_attr.attr))
1785 goto fail;
1786
1787 return;
1788 fail:
1789 panic("shutdown_triggers_init failed\n");
1790 }
1791
1792 static void __init shutdown_actions_init(void)
1793 {
1794 int i;
1795
1796 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1797 if (!shutdown_actions_list[i]->init)
1798 continue;
1799 shutdown_actions_list[i]->init_rc =
1800 shutdown_actions_list[i]->init();
1801 }
1802 }
1803
1804 static int __init s390_ipl_init(void)
1805 {
1806 sclp_get_ipl_info(&sclp_ipl_info);
1807 shutdown_actions_init();
1808 shutdown_triggers_init();
1809 return 0;
1810 }
1811
1812 __initcall(s390_ipl_init);
1813
1814 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1815 {
1816 int sx, dx;
1817
1818 dx = 0;
1819 for (sx = 0; src[sx] != 0; sx++) {
1820 if (src[sx] == '"')
1821 continue;
1822 dst[dx++] = src[sx];
1823 if (dx >= n)
1824 break;
1825 }
1826 }
1827
1828 static int __init vmcmd_on_reboot_setup(char *str)
1829 {
1830 if (!MACHINE_IS_VM)
1831 return 1;
1832 strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1833 vmcmd_on_reboot[127] = 0;
1834 on_reboot_trigger.action = &vmcmd_action;
1835 return 1;
1836 }
1837 __setup("vmreboot=", vmcmd_on_reboot_setup);
1838
1839 static int __init vmcmd_on_panic_setup(char *str)
1840 {
1841 if (!MACHINE_IS_VM)
1842 return 1;
1843 strncpy_skip_quote(vmcmd_on_panic, str, 127);
1844 vmcmd_on_panic[127] = 0;
1845 on_panic_trigger.action = &vmcmd_action;
1846 return 1;
1847 }
1848 __setup("vmpanic=", vmcmd_on_panic_setup);
1849
1850 static int __init vmcmd_on_halt_setup(char *str)
1851 {
1852 if (!MACHINE_IS_VM)
1853 return 1;
1854 strncpy_skip_quote(vmcmd_on_halt, str, 127);
1855 vmcmd_on_halt[127] = 0;
1856 on_halt_trigger.action = &vmcmd_action;
1857 return 1;
1858 }
1859 __setup("vmhalt=", vmcmd_on_halt_setup);
1860
1861 static int __init vmcmd_on_poff_setup(char *str)
1862 {
1863 if (!MACHINE_IS_VM)
1864 return 1;
1865 strncpy_skip_quote(vmcmd_on_poff, str, 127);
1866 vmcmd_on_poff[127] = 0;
1867 on_poff_trigger.action = &vmcmd_action;
1868 return 1;
1869 }
1870 __setup("vmpoff=", vmcmd_on_poff_setup);
1871
1872 static int on_panic_notify(struct notifier_block *self,
1873 unsigned long event, void *data)
1874 {
1875 do_panic();
1876 return NOTIFY_OK;
1877 }
1878
1879 static struct notifier_block on_panic_nb = {
1880 .notifier_call = on_panic_notify,
1881 .priority = INT_MIN,
1882 };
1883
1884 void __init setup_ipl(void)
1885 {
1886 ipl_info.type = get_ipl_type();
1887 switch (ipl_info.type) {
1888 case IPL_TYPE_CCW:
1889 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1890 ipl_info.data.ccw.dev_id.ssid = 0;
1891 break;
1892 case IPL_TYPE_FCP:
1893 case IPL_TYPE_FCP_DUMP:
1894 ipl_info.data.fcp.dev_id.devno =
1895 IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1896 ipl_info.data.fcp.dev_id.ssid = 0;
1897 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1898 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1899 break;
1900 case IPL_TYPE_NSS:
1901 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1902 sizeof(ipl_info.data.nss.name));
1903 break;
1904 case IPL_TYPE_UNKNOWN:
1905 /* We have no info to copy */
1906 break;
1907 }
1908 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1909 }
1910
1911 void __init ipl_update_parameters(void)
1912 {
1913 int rc;
1914
1915 rc = diag308(DIAG308_STORE, &ipl_block);
1916 if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
1917 diag308_set_works = 1;
1918 }
1919
1920 void __init ipl_save_parameters(void)
1921 {
1922 struct cio_iplinfo iplinfo;
1923 void *src, *dst;
1924
1925 if (cio_get_iplinfo(&iplinfo))
1926 return;
1927
1928 ipl_devno = iplinfo.devno;
1929 ipl_flags |= IPL_DEVNO_VALID;
1930 if (!iplinfo.is_qdio)
1931 return;
1932 ipl_flags |= IPL_PARMBLOCK_VALID;
1933 src = (void *)(unsigned long)S390_lowcore.ipl_parmblock_ptr;
1934 dst = (void *)IPL_PARMBLOCK_ORIGIN;
1935 memmove(dst, src, PAGE_SIZE);
1936 S390_lowcore.ipl_parmblock_ptr = IPL_PARMBLOCK_ORIGIN;
1937 }
1938
1939 static LIST_HEAD(rcall);
1940 static DEFINE_MUTEX(rcall_mutex);
1941
1942 void register_reset_call(struct reset_call *reset)
1943 {
1944 mutex_lock(&rcall_mutex);
1945 list_add(&reset->list, &rcall);
1946 mutex_unlock(&rcall_mutex);
1947 }
1948 EXPORT_SYMBOL_GPL(register_reset_call);
1949
1950 void unregister_reset_call(struct reset_call *reset)
1951 {
1952 mutex_lock(&rcall_mutex);
1953 list_del(&reset->list);
1954 mutex_unlock(&rcall_mutex);
1955 }
1956 EXPORT_SYMBOL_GPL(unregister_reset_call);
1957
1958 static void do_reset_calls(void)
1959 {
1960 struct reset_call *reset;
1961
1962 list_for_each_entry(reset, &rcall, list)
1963 reset->fn();
1964 }
1965
1966 u32 dump_prefix_page;
1967
1968 void s390_reset_system(void)
1969 {
1970 struct _lowcore *lc;
1971
1972 lc = (struct _lowcore *)(unsigned long) store_prefix();
1973
1974 /* Stack for interrupt/machine check handler */
1975 lc->panic_stack = S390_lowcore.panic_stack;
1976
1977 /* Save prefix page address for dump case */
1978 dump_prefix_page = (u32)(unsigned long) lc;
1979
1980 /* Disable prefixing */
1981 set_prefix(0);
1982
1983 /* Disable lowcore protection */
1984 __ctl_clear_bit(0,28);
1985
1986 /* Set new machine check handler */
1987 S390_lowcore.mcck_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
1988 S390_lowcore.mcck_new_psw.addr =
1989 PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;
1990
1991 /* Set new program check handler */
1992 S390_lowcore.program_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
1993 S390_lowcore.program_new_psw.addr =
1994 PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
1995
1996 do_reset_calls();
1997 }
1998