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Merge branch 'quilt/device-mapper'
[linux-2.6/next.git] / arch / s390 / kernel / ipl.c
blob4e16830b710f6cef560cf0272669ada310d18d46
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 <linux/crash_dump.h>
20 #include <asm/ipl.h>
21 #include <asm/smp.h>
22 #include <asm/setup.h>
23 #include <asm/cpcmd.h>
24 #include <asm/cio.h>
25 #include <asm/ebcdic.h>
26 #include <asm/reset.h>
27 #include <asm/sclp.h>
28 #include <asm/sigp.h>
29 #include <asm/checksum.h>
30
31 #define IPL_PARM_BLOCK_VERSION 0
32
33 #define IPL_UNKNOWN_STR "unknown"
34 #define IPL_CCW_STR "ccw"
35 #define IPL_FCP_STR "fcp"
36 #define IPL_FCP_DUMP_STR "fcp_dump"
37 #define IPL_NSS_STR "nss"
38
39 #define DUMP_CCW_STR "ccw"
40 #define DUMP_FCP_STR "fcp"
41 #define DUMP_NONE_STR "none"
42
43 /*
44 * Four shutdown trigger types are supported:
45 * - panic
46 * - halt
47 * - power off
48 * - reipl
49 * - restart
50 */
51 #define ON_PANIC_STR "on_panic"
52 #define ON_HALT_STR "on_halt"
53 #define ON_POFF_STR "on_poff"
54 #define ON_REIPL_STR "on_reboot"
55 #define ON_RESTART_STR "on_restart"
56
57 struct shutdown_action;
58 struct shutdown_trigger {
59 char *name;
60 struct shutdown_action *action;
61 };
62
63 /*
64 * The following shutdown action types are supported:
65 */
66 #define SHUTDOWN_ACTION_IPL_STR "ipl"
67 #define SHUTDOWN_ACTION_REIPL_STR "reipl"
68 #define SHUTDOWN_ACTION_DUMP_STR "dump"
69 #define SHUTDOWN_ACTION_VMCMD_STR "vmcmd"
70 #define SHUTDOWN_ACTION_STOP_STR "stop"
71 #define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl"
72
73 struct shutdown_action {
74 char *name;
75 void (*fn) (struct shutdown_trigger *trigger);
76 int (*init) (void);
77 int init_rc;
78 };
79
80 static char *ipl_type_str(enum ipl_type type)
81 {
82 switch (type) {
83 case IPL_TYPE_CCW:
84 return IPL_CCW_STR;
85 case IPL_TYPE_FCP:
86 return IPL_FCP_STR;
87 case IPL_TYPE_FCP_DUMP:
88 return IPL_FCP_DUMP_STR;
89 case IPL_TYPE_NSS:
90 return IPL_NSS_STR;
91 case IPL_TYPE_UNKNOWN:
92 default:
93 return IPL_UNKNOWN_STR;
94 }
95 }
96
97 enum dump_type {
98 DUMP_TYPE_NONE = 1,
99 DUMP_TYPE_CCW = 2,
100 DUMP_TYPE_FCP = 4,
101 };
102
103 static char *dump_type_str(enum dump_type type)
104 {
105 switch (type) {
106 case DUMP_TYPE_NONE:
107 return DUMP_NONE_STR;
108 case DUMP_TYPE_CCW:
109 return DUMP_CCW_STR;
110 case DUMP_TYPE_FCP:
111 return DUMP_FCP_STR;
112 default:
113 return NULL;
114 }
115 }
116
117 /*
118 * Must be in data section since the bss section
119 * is not cleared when these are accessed.
120 */
121 static u16 ipl_devno __attribute__((__section__(".data"))) = 0;
122 u32 ipl_flags __attribute__((__section__(".data"))) = 0;
123
124 enum ipl_method {
125 REIPL_METHOD_CCW_CIO,
126 REIPL_METHOD_CCW_DIAG,
127 REIPL_METHOD_CCW_VM,
128 REIPL_METHOD_FCP_RO_DIAG,
129 REIPL_METHOD_FCP_RW_DIAG,
130 REIPL_METHOD_FCP_RO_VM,
131 REIPL_METHOD_FCP_DUMP,
132 REIPL_METHOD_NSS,
133 REIPL_METHOD_NSS_DIAG,
134 REIPL_METHOD_DEFAULT,
135 };
136
137 enum dump_method {
138 DUMP_METHOD_NONE,
139 DUMP_METHOD_CCW_CIO,
140 DUMP_METHOD_CCW_DIAG,
141 DUMP_METHOD_CCW_VM,
142 DUMP_METHOD_FCP_DIAG,
143 };
144
145 static int diag308_set_works = 0;
146
147 static struct ipl_parameter_block ipl_block;
148
149 static int reipl_capabilities = IPL_TYPE_UNKNOWN;
150
151 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
152 static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
153 static struct ipl_parameter_block *reipl_block_fcp;
154 static struct ipl_parameter_block *reipl_block_ccw;
155 static struct ipl_parameter_block *reipl_block_nss;
156 static struct ipl_parameter_block *reipl_block_actual;
157
158 static int dump_capabilities = DUMP_TYPE_NONE;
159 static enum dump_type dump_type = DUMP_TYPE_NONE;
160 static enum dump_method dump_method = DUMP_METHOD_NONE;
161 static struct ipl_parameter_block *dump_block_fcp;
162 static struct ipl_parameter_block *dump_block_ccw;
163
164 static struct sclp_ipl_info sclp_ipl_info;
165
166 int diag308(unsigned long subcode, void *addr)
167 {
168 register unsigned long _addr asm("0") = (unsigned long) addr;
169 register unsigned long _rc asm("1") = 0;
170
171 asm volatile(
172 " diag %0,%2,0x308\n"
173 "0:\n"
174 EX_TABLE(0b,0b)
175 : "+d" (_addr), "+d" (_rc)
176 : "d" (subcode) : "cc", "memory");
177 return _rc;
178 }
179 EXPORT_SYMBOL_GPL(diag308);
180
181 /* SYSFS */
182
183 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
184 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
185 struct kobj_attribute *attr, \
186 char *page) \
187 { \
188 return sprintf(page, _format, _value); \
189 } \
190 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
191 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL);
192
193 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
194 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
195 struct kobj_attribute *attr, \
196 char *page) \
197 { \
198 return sprintf(page, _fmt_out, \
199 (unsigned long long) _value); \
200 } \
201 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
202 struct kobj_attribute *attr, \
203 const char *buf, size_t len) \
204 { \
205 unsigned long long value; \
206 if (sscanf(buf, _fmt_in, &value) != 1) \
207 return -EINVAL; \
208 _value = value; \
209 return len; \
210 } \
211 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
212 __ATTR(_name,(S_IRUGO | S_IWUSR), \
213 sys_##_prefix##_##_name##_show, \
214 sys_##_prefix##_##_name##_store);
215
216 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
217 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
218 struct kobj_attribute *attr, \
219 char *page) \
220 { \
221 return sprintf(page, _fmt_out, _value); \
222 } \
223 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
224 struct kobj_attribute *attr, \
225 const char *buf, size_t len) \
226 { \
227 strncpy(_value, buf, sizeof(_value) - 1); \
228 strim(_value); \
229 return len; \
230 } \
231 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
232 __ATTR(_name,(S_IRUGO | S_IWUSR), \
233 sys_##_prefix##_##_name##_show, \
234 sys_##_prefix##_##_name##_store);
235
236 static void make_attrs_ro(struct attribute **attrs)
237 {
238 while (*attrs) {
239 (*attrs)->mode = S_IRUGO;
240 attrs++;
241 }
242 }
243
244 /*
245 * ipl section
246 */
247
248 static __init enum ipl_type get_ipl_type(void)
249 {
250 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
251
252 if (ipl_flags & IPL_NSS_VALID)
253 return IPL_TYPE_NSS;
254 if (!(ipl_flags & IPL_DEVNO_VALID))
255 return IPL_TYPE_UNKNOWN;
256 if (!(ipl_flags & IPL_PARMBLOCK_VALID))
257 return IPL_TYPE_CCW;
258 if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
259 return IPL_TYPE_UNKNOWN;
260 if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
261 return IPL_TYPE_UNKNOWN;
262 if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
263 return IPL_TYPE_FCP_DUMP;
264 return IPL_TYPE_FCP;
265 }
266
267 struct ipl_info ipl_info;
268 EXPORT_SYMBOL_GPL(ipl_info);
269
270 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
271 char *page)
272 {
273 return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
274 }
275
276 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
277
278 /* VM IPL PARM routines */
279 size_t reipl_get_ascii_vmparm(char *dest, size_t size,
280 const struct ipl_parameter_block *ipb)
281 {
282 int i;
283 size_t len;
284 char has_lowercase = 0;
285
286 len = 0;
287 if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
288 (ipb->ipl_info.ccw.vm_parm_len > 0)) {
289
290 len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
291 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
292 /* If at least one character is lowercase, we assume mixed
293 * case; otherwise we convert everything to lowercase.
294 */
295 for (i = 0; i < len; i++)
296 if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
297 (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
298 (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
299 has_lowercase = 1;
300 break;
301 }
302 if (!has_lowercase)
303 EBC_TOLOWER(dest, len);
304 EBCASC(dest, len);
305 }
306 dest[len] = 0;
307
308 return len;
309 }
310
311 size_t append_ipl_vmparm(char *dest, size_t size)
312 {
313 size_t rc;
314
315 rc = 0;
316 if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
317 rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
318 else
319 dest[0] = 0;
320 return rc;
321 }
322
323 static ssize_t ipl_vm_parm_show(struct kobject *kobj,
324 struct kobj_attribute *attr, char *page)
325 {
326 char parm[DIAG308_VMPARM_SIZE + 1] = {};
327
328 append_ipl_vmparm(parm, sizeof(parm));
329 return sprintf(page, "%s\n", parm);
330 }
331
332 static size_t scpdata_length(const char* buf, size_t count)
333 {
334 while (count) {
335 if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
336 break;
337 count--;
338 }
339 return count;
340 }
341
342 size_t reipl_append_ascii_scpdata(char *dest, size_t size,
343 const struct ipl_parameter_block *ipb)
344 {
345 size_t count;
346 size_t i;
347 int has_lowercase;
348
349 count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data,
350 ipb->ipl_info.fcp.scp_data_len));
351 if (!count)
352 goto out;
353
354 has_lowercase = 0;
355 for (i = 0; i < count; i++) {
356 if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
357 count = 0;
358 goto out;
359 }
360 if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
361 has_lowercase = 1;
362 }
363
364 if (has_lowercase)
365 memcpy(dest, ipb->ipl_info.fcp.scp_data, count);
366 else
367 for (i = 0; i < count; i++)
368 dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]);
369 out:
370 dest[count] = '\0';
371 return count;
372 }
373
374 size_t append_ipl_scpdata(char *dest, size_t len)
375 {
376 size_t rc;
377
378 rc = 0;
379 if (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP)
380 rc = reipl_append_ascii_scpdata(dest, len, &ipl_block);
381 else
382 dest[0] = 0;
383 return rc;
384 }
385
386
387 static struct kobj_attribute sys_ipl_vm_parm_attr =
388 __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
389
390 static ssize_t sys_ipl_device_show(struct kobject *kobj,
391 struct kobj_attribute *attr, char *page)
392 {
393 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
394
395 switch (ipl_info.type) {
396 case IPL_TYPE_CCW:
397 return sprintf(page, "0.0.%04x\n", ipl_devno);
398 case IPL_TYPE_FCP:
399 case IPL_TYPE_FCP_DUMP:
400 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
401 default:
402 return 0;
403 }
404 }
405
406 static struct kobj_attribute sys_ipl_device_attr =
407 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
408
409 static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
410 struct bin_attribute *attr, char *buf,
411 loff_t off, size_t count)
412 {
413 return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START,
414 IPL_PARMBLOCK_SIZE);
415 }
416
417 static struct bin_attribute ipl_parameter_attr = {
418 .attr = {
419 .name = "binary_parameter",
420 .mode = S_IRUGO,
421 },
422 .size = PAGE_SIZE,
423 .read = &ipl_parameter_read,
424 };
425
426 static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
427 struct bin_attribute *attr, char *buf,
428 loff_t off, size_t count)
429 {
430 unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
431 void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
432
433 return memory_read_from_buffer(buf, count, &off, scp_data, size);
434 }
435
436 static struct bin_attribute ipl_scp_data_attr = {
437 .attr = {
438 .name = "scp_data",
439 .mode = S_IRUGO,
440 },
441 .size = PAGE_SIZE,
442 .read = ipl_scp_data_read,
443 };
444
445 /* FCP ipl device attributes */
446
447 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
448 IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
449 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
450 IPL_PARMBLOCK_START->ipl_info.fcp.lun);
451 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
452 IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
453 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
454 IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
455
456 static struct attribute *ipl_fcp_attrs[] = {
457 &sys_ipl_type_attr.attr,
458 &sys_ipl_device_attr.attr,
459 &sys_ipl_fcp_wwpn_attr.attr,
460 &sys_ipl_fcp_lun_attr.attr,
461 &sys_ipl_fcp_bootprog_attr.attr,
462 &sys_ipl_fcp_br_lba_attr.attr,
463 NULL,
464 };
465
466 static struct attribute_group ipl_fcp_attr_group = {
467 .attrs = ipl_fcp_attrs,
468 };
469
470 /* CCW ipl device attributes */
471
472 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
473 struct kobj_attribute *attr, char *page)
474 {
475 char loadparm[LOADPARM_LEN + 1] = {};
476
477 if (!sclp_ipl_info.is_valid)
478 return sprintf(page, "#unknown#\n");
479 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
480 EBCASC(loadparm, LOADPARM_LEN);
481 strim(loadparm);
482 return sprintf(page, "%s\n", loadparm);
483 }
484
485 static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
486 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
487
488 static struct attribute *ipl_ccw_attrs_vm[] = {
489 &sys_ipl_type_attr.attr,
490 &sys_ipl_device_attr.attr,
491 &sys_ipl_ccw_loadparm_attr.attr,
492 &sys_ipl_vm_parm_attr.attr,
493 NULL,
494 };
495
496 static struct attribute *ipl_ccw_attrs_lpar[] = {
497 &sys_ipl_type_attr.attr,
498 &sys_ipl_device_attr.attr,
499 &sys_ipl_ccw_loadparm_attr.attr,
500 NULL,
501 };
502
503 static struct attribute_group ipl_ccw_attr_group_vm = {
504 .attrs = ipl_ccw_attrs_vm,
505 };
506
507 static struct attribute_group ipl_ccw_attr_group_lpar = {
508 .attrs = ipl_ccw_attrs_lpar
509 };
510
511 /* NSS ipl device attributes */
512
513 DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
514
515 static struct attribute *ipl_nss_attrs[] = {
516 &sys_ipl_type_attr.attr,
517 &sys_ipl_nss_name_attr.attr,
518 &sys_ipl_ccw_loadparm_attr.attr,
519 &sys_ipl_vm_parm_attr.attr,
520 NULL,
521 };
522
523 static struct attribute_group ipl_nss_attr_group = {
524 .attrs = ipl_nss_attrs,
525 };
526
527 /* UNKNOWN ipl device attributes */
528
529 static struct attribute *ipl_unknown_attrs[] = {
530 &sys_ipl_type_attr.attr,
531 NULL,
532 };
533
534 static struct attribute_group ipl_unknown_attr_group = {
535 .attrs = ipl_unknown_attrs,
536 };
537
538 static struct kset *ipl_kset;
539
540 static int __init ipl_register_fcp_files(void)
541 {
542 int rc;
543
544 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
545 if (rc)
546 goto out;
547 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
548 if (rc)
549 goto out_ipl_parm;
550 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_scp_data_attr);
551 if (!rc)
552 goto out;
553
554 sysfs_remove_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
555
556 out_ipl_parm:
557 sysfs_remove_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
558 out:
559 return rc;
560 }
561
562 static void __ipl_run(void *unused)
563 {
564 diag308(DIAG308_IPL, NULL);
565 if (MACHINE_IS_VM)
566 __cpcmd("IPL", NULL, 0, NULL);
567 else if (ipl_info.type == IPL_TYPE_CCW)
568 reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
569 }
570
571 static void ipl_run(struct shutdown_trigger *trigger)
572 {
573 smp_switch_to_ipl_cpu(__ipl_run, NULL);
574 }
575
576 static int __init ipl_init(void)
577 {
578 int rc;
579
580 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
581 if (!ipl_kset) {
582 rc = -ENOMEM;
583 goto out;
584 }
585 switch (ipl_info.type) {
586 case IPL_TYPE_CCW:
587 if (MACHINE_IS_VM)
588 rc = sysfs_create_group(&ipl_kset->kobj,
589 &ipl_ccw_attr_group_vm);
590 else
591 rc = sysfs_create_group(&ipl_kset->kobj,
592 &ipl_ccw_attr_group_lpar);
593 break;
594 case IPL_TYPE_FCP:
595 case IPL_TYPE_FCP_DUMP:
596 rc = ipl_register_fcp_files();
597 break;
598 case IPL_TYPE_NSS:
599 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group);
600 break;
601 default:
602 rc = sysfs_create_group(&ipl_kset->kobj,
603 &ipl_unknown_attr_group);
604 break;
605 }
606 out:
607 if (rc)
608 panic("ipl_init failed: rc = %i\n", rc);
609
610 return 0;
611 }
612
613 static struct shutdown_action __refdata ipl_action = {
614 .name = SHUTDOWN_ACTION_IPL_STR,
615 .fn = ipl_run,
616 .init = ipl_init,
617 };
618
619 /*
620 * reipl shutdown action: Reboot Linux on shutdown.
621 */
622
623 /* VM IPL PARM attributes */
624 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
625 char *page)
626 {
627 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
628
629 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
630 return sprintf(page, "%s\n", vmparm);
631 }
632
633 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
634 size_t vmparm_max,
635 const char *buf, size_t len)
636 {
637 int i, ip_len;
638
639 /* ignore trailing newline */
640 ip_len = len;
641 if ((len > 0) && (buf[len - 1] == '\n'))
642 ip_len--;
643
644 if (ip_len > vmparm_max)
645 return -EINVAL;
646
647 /* parm is used to store kernel options, check for common chars */
648 for (i = 0; i < ip_len; i++)
649 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
650 return -EINVAL;
651
652 memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
653 ipb->ipl_info.ccw.vm_parm_len = ip_len;
654 if (ip_len > 0) {
655 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
656 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
657 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
658 } else {
659 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
660 }
661
662 return len;
663 }
664
665 /* NSS wrapper */
666 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
667 struct kobj_attribute *attr, char *page)
668 {
669 return reipl_generic_vmparm_show(reipl_block_nss, page);
670 }
671
672 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
673 struct kobj_attribute *attr,
674 const char *buf, size_t len)
675 {
676 return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
677 }
678
679 /* CCW wrapper */
680 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
681 struct kobj_attribute *attr, char *page)
682 {
683 return reipl_generic_vmparm_show(reipl_block_ccw, page);
684 }
685
686 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
687 struct kobj_attribute *attr,
688 const char *buf, size_t len)
689 {
690 return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
691 }
692
693 static struct kobj_attribute sys_reipl_nss_vmparm_attr =
694 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
695 reipl_nss_vmparm_store);
696 static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
697 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
698 reipl_ccw_vmparm_store);
699
700 /* FCP reipl device attributes */
701
702 static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
703 struct bin_attribute *attr,
704 char *buf, loff_t off, size_t count)
705 {
706 size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
707 void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
708
709 return memory_read_from_buffer(buf, count, &off, scp_data, size);
710 }
711
712 static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
713 struct bin_attribute *attr,
714 char *buf, loff_t off, size_t count)
715 {
716 size_t padding;
717 size_t scpdata_len;
718
719 if (off < 0)
720 return -EINVAL;
721
722 if (off >= DIAG308_SCPDATA_SIZE)
723 return -ENOSPC;
724
725 if (count > DIAG308_SCPDATA_SIZE - off)
726 count = DIAG308_SCPDATA_SIZE - off;
727
728 memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf + off, count);
729 scpdata_len = off + count;
730
731 if (scpdata_len % 8) {
732 padding = 8 - (scpdata_len % 8);
733 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
734 0, padding);
735 scpdata_len += padding;
736 }
737
738 reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
739 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
740 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
741
742 return count;
743 }
744
745 static struct bin_attribute sys_reipl_fcp_scp_data_attr = {
746 .attr = {
747 .name = "scp_data",
748 .mode = S_IRUGO | S_IWUSR,
749 },
750 .size = PAGE_SIZE,
751 .read = reipl_fcp_scpdata_read,
752 .write = reipl_fcp_scpdata_write,
753 };
754
755 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n",
756 reipl_block_fcp->ipl_info.fcp.wwpn);
757 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n",
758 reipl_block_fcp->ipl_info.fcp.lun);
759 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
760 reipl_block_fcp->ipl_info.fcp.bootprog);
761 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
762 reipl_block_fcp->ipl_info.fcp.br_lba);
763 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
764 reipl_block_fcp->ipl_info.fcp.devno);
765
766 static struct attribute *reipl_fcp_attrs[] = {
767 &sys_reipl_fcp_device_attr.attr,
768 &sys_reipl_fcp_wwpn_attr.attr,
769 &sys_reipl_fcp_lun_attr.attr,
770 &sys_reipl_fcp_bootprog_attr.attr,
771 &sys_reipl_fcp_br_lba_attr.attr,
772 NULL,
773 };
774
775 static struct attribute_group reipl_fcp_attr_group = {
776 .attrs = reipl_fcp_attrs,
777 };
778
779 /* CCW reipl device attributes */
780
781 DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
782 reipl_block_ccw->ipl_info.ccw.devno);
783
784 static void reipl_get_ascii_loadparm(char *loadparm,
785 struct ipl_parameter_block *ibp)
786 {
787 memcpy(loadparm, ibp->ipl_info.ccw.load_parm, LOADPARM_LEN);
788 EBCASC(loadparm, LOADPARM_LEN);
789 loadparm[LOADPARM_LEN] = 0;
790 strim(loadparm);
791 }
792
793 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
794 char *page)
795 {
796 char buf[LOADPARM_LEN + 1];
797
798 reipl_get_ascii_loadparm(buf, ipb);
799 return sprintf(page, "%s\n", buf);
800 }
801
802 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
803 const char *buf, size_t len)
804 {
805 int i, lp_len;
806
807 /* ignore trailing newline */
808 lp_len = len;
809 if ((len > 0) && (buf[len - 1] == '\n'))
810 lp_len--;
811 /* loadparm can have max 8 characters and must not start with a blank */
812 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
813 return -EINVAL;
814 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
815 for (i = 0; i < lp_len; i++) {
816 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
817 (buf[i] == '.'))
818 continue;
819 return -EINVAL;
820 }
821 /* initialize loadparm with blanks */
822 memset(ipb->ipl_info.ccw.load_parm, ' ', LOADPARM_LEN);
823 /* copy and convert to ebcdic */
824 memcpy(ipb->ipl_info.ccw.load_parm, buf, lp_len);
825 ASCEBC(ipb->ipl_info.ccw.load_parm, LOADPARM_LEN);
826 return len;
827 }
828
829 /* NSS wrapper */
830 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
831 struct kobj_attribute *attr, char *page)
832 {
833 return reipl_generic_loadparm_show(reipl_block_nss, page);
834 }
835
836 static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
837 struct kobj_attribute *attr,
838 const char *buf, size_t len)
839 {
840 return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
841 }
842
843 /* CCW wrapper */
844 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
845 struct kobj_attribute *attr, char *page)
846 {
847 return reipl_generic_loadparm_show(reipl_block_ccw, page);
848 }
849
850 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
851 struct kobj_attribute *attr,
852 const char *buf, size_t len)
853 {
854 return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
855 }
856
857 static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
858 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
859 reipl_ccw_loadparm_store);
860
861 static struct attribute *reipl_ccw_attrs_vm[] = {
862 &sys_reipl_ccw_device_attr.attr,
863 &sys_reipl_ccw_loadparm_attr.attr,
864 &sys_reipl_ccw_vmparm_attr.attr,
865 NULL,
866 };
867
868 static struct attribute *reipl_ccw_attrs_lpar[] = {
869 &sys_reipl_ccw_device_attr.attr,
870 &sys_reipl_ccw_loadparm_attr.attr,
871 NULL,
872 };
873
874 static struct attribute_group reipl_ccw_attr_group_vm = {
875 .name = IPL_CCW_STR,
876 .attrs = reipl_ccw_attrs_vm,
877 };
878
879 static struct attribute_group reipl_ccw_attr_group_lpar = {
880 .name = IPL_CCW_STR,
881 .attrs = reipl_ccw_attrs_lpar,
882 };
883
884
885 /* NSS reipl device attributes */
886 static void reipl_get_ascii_nss_name(char *dst,
887 struct ipl_parameter_block *ipb)
888 {
889 memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
890 EBCASC(dst, NSS_NAME_SIZE);
891 dst[NSS_NAME_SIZE] = 0;
892 }
893
894 static ssize_t reipl_nss_name_show(struct kobject *kobj,
895 struct kobj_attribute *attr, char *page)
896 {
897 char nss_name[NSS_NAME_SIZE + 1] = {};
898
899 reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
900 return sprintf(page, "%s\n", nss_name);
901 }
902
903 static ssize_t reipl_nss_name_store(struct kobject *kobj,
904 struct kobj_attribute *attr,
905 const char *buf, size_t len)
906 {
907 int nss_len;
908
909 /* ignore trailing newline */
910 nss_len = len;
911 if ((len > 0) && (buf[len - 1] == '\n'))
912 nss_len--;
913
914 if (nss_len > NSS_NAME_SIZE)
915 return -EINVAL;
916
917 memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
918 if (nss_len > 0) {
919 reipl_block_nss->ipl_info.ccw.vm_flags |=
920 DIAG308_VM_FLAGS_NSS_VALID;
921 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
922 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
923 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
924 } else {
925 reipl_block_nss->ipl_info.ccw.vm_flags &=
926 ~DIAG308_VM_FLAGS_NSS_VALID;
927 }
928
929 return len;
930 }
931
932 static struct kobj_attribute sys_reipl_nss_name_attr =
933 __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
934 reipl_nss_name_store);
935
936 static struct kobj_attribute sys_reipl_nss_loadparm_attr =
937 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
938 reipl_nss_loadparm_store);
939
940 static struct attribute *reipl_nss_attrs[] = {
941 &sys_reipl_nss_name_attr.attr,
942 &sys_reipl_nss_loadparm_attr.attr,
943 &sys_reipl_nss_vmparm_attr.attr,
944 NULL,
945 };
946
947 static struct attribute_group reipl_nss_attr_group = {
948 .name = IPL_NSS_STR,
949 .attrs = reipl_nss_attrs,
950 };
951
952 /* reipl type */
953
954 static int reipl_set_type(enum ipl_type type)
955 {
956 if (!(reipl_capabilities & type))
957 return -EINVAL;
958
959 switch(type) {
960 case IPL_TYPE_CCW:
961 if (diag308_set_works)
962 reipl_method = REIPL_METHOD_CCW_DIAG;
963 else if (MACHINE_IS_VM)
964 reipl_method = REIPL_METHOD_CCW_VM;
965 else
966 reipl_method = REIPL_METHOD_CCW_CIO;
967 reipl_block_actual = reipl_block_ccw;
968 break;
969 case IPL_TYPE_FCP:
970 if (diag308_set_works)
971 reipl_method = REIPL_METHOD_FCP_RW_DIAG;
972 else if (MACHINE_IS_VM)
973 reipl_method = REIPL_METHOD_FCP_RO_VM;
974 else
975 reipl_method = REIPL_METHOD_FCP_RO_DIAG;
976 reipl_block_actual = reipl_block_fcp;
977 break;
978 case IPL_TYPE_FCP_DUMP:
979 reipl_method = REIPL_METHOD_FCP_DUMP;
980 break;
981 case IPL_TYPE_NSS:
982 if (diag308_set_works)
983 reipl_method = REIPL_METHOD_NSS_DIAG;
984 else
985 reipl_method = REIPL_METHOD_NSS;
986 reipl_block_actual = reipl_block_nss;
987 break;
988 case IPL_TYPE_UNKNOWN:
989 reipl_method = REIPL_METHOD_DEFAULT;
990 break;
991 default:
992 BUG();
993 }
994 reipl_type = type;
995 return 0;
996 }
997
998 static ssize_t reipl_type_show(struct kobject *kobj,
999 struct kobj_attribute *attr, char *page)
1000 {
1001 return sprintf(page, "%s\n", ipl_type_str(reipl_type));
1002 }
1003
1004 static ssize_t reipl_type_store(struct kobject *kobj,
1005 struct kobj_attribute *attr,
1006 const char *buf, size_t len)
1007 {
1008 int rc = -EINVAL;
1009
1010 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1011 rc = reipl_set_type(IPL_TYPE_CCW);
1012 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1013 rc = reipl_set_type(IPL_TYPE_FCP);
1014 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1015 rc = reipl_set_type(IPL_TYPE_NSS);
1016 return (rc != 0) ? rc : len;
1017 }
1018
1019 static struct kobj_attribute reipl_type_attr =
1020 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
1021
1022 static struct kset *reipl_kset;
1023 static struct kset *reipl_fcp_kset;
1024
1025 static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
1026 const enum ipl_method m)
1027 {
1028 char loadparm[LOADPARM_LEN + 1] = {};
1029 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
1030 char nss_name[NSS_NAME_SIZE + 1] = {};
1031 size_t pos = 0;
1032
1033 reipl_get_ascii_loadparm(loadparm, ipb);
1034 reipl_get_ascii_nss_name(nss_name, ipb);
1035 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
1036
1037 switch (m) {
1038 case REIPL_METHOD_CCW_VM:
1039 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
1040 break;
1041 case REIPL_METHOD_NSS:
1042 pos = sprintf(dst, "IPL %s", nss_name);
1043 break;
1044 default:
1045 break;
1046 }
1047 if (strlen(loadparm) > 0)
1048 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
1049 if (strlen(vmparm) > 0)
1050 sprintf(dst + pos, " PARM %s", vmparm);
1051 }
1052
1053 static void __reipl_run(void *unused)
1054 {
1055 struct ccw_dev_id devid;
1056 static char buf[128];
1057
1058 switch (reipl_method) {
1059 case REIPL_METHOD_CCW_CIO:
1060 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
1061 devid.ssid = 0;
1062 reipl_ccw_dev(&devid);
1063 break;
1064 case REIPL_METHOD_CCW_VM:
1065 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
1066 __cpcmd(buf, NULL, 0, NULL);
1067 break;
1068 case REIPL_METHOD_CCW_DIAG:
1069 diag308(DIAG308_SET, reipl_block_ccw);
1070 diag308(DIAG308_IPL, NULL);
1071 break;
1072 case REIPL_METHOD_FCP_RW_DIAG:
1073 diag308(DIAG308_SET, reipl_block_fcp);
1074 diag308(DIAG308_IPL, NULL);
1075 break;
1076 case REIPL_METHOD_FCP_RO_DIAG:
1077 diag308(DIAG308_IPL, NULL);
1078 break;
1079 case REIPL_METHOD_FCP_RO_VM:
1080 __cpcmd("IPL", NULL, 0, NULL);
1081 break;
1082 case REIPL_METHOD_NSS_DIAG:
1083 diag308(DIAG308_SET, reipl_block_nss);
1084 diag308(DIAG308_IPL, NULL);
1085 break;
1086 case REIPL_METHOD_NSS:
1087 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
1088 __cpcmd(buf, NULL, 0, NULL);
1089 break;
1090 case REIPL_METHOD_DEFAULT:
1091 if (MACHINE_IS_VM)
1092 __cpcmd("IPL", NULL, 0, NULL);
1093 diag308(DIAG308_IPL, NULL);
1094 break;
1095 case REIPL_METHOD_FCP_DUMP:
1096 break;
1097 }
1098 disabled_wait((unsigned long) __builtin_return_address(0));
1099 }
1100
1101 static void reipl_run(struct shutdown_trigger *trigger)
1102 {
1103 smp_switch_to_ipl_cpu(__reipl_run, NULL);
1104 }
1105
1106 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
1107 {
1108 ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
1109 ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1110 ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1111 ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1112 }
1113
1114 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1115 {
1116 /* LOADPARM */
1117 /* check if read scp info worked and set loadparm */
1118 if (sclp_ipl_info.is_valid)
1119 memcpy(ipb->ipl_info.ccw.load_parm,
1120 &sclp_ipl_info.loadparm, LOADPARM_LEN);
1121 else
1122 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1123 memset(ipb->ipl_info.ccw.load_parm, 0x40, LOADPARM_LEN);
1124 ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
1125
1126 /* VM PARM */
1127 if (MACHINE_IS_VM && diag308_set_works &&
1128 (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1129
1130 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1131 ipb->ipl_info.ccw.vm_parm_len =
1132 ipl_block.ipl_info.ccw.vm_parm_len;
1133 memcpy(ipb->ipl_info.ccw.vm_parm,
1134 ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1135 }
1136 }
1137
1138 static int __init reipl_nss_init(void)
1139 {
1140 int rc;
1141
1142 if (!MACHINE_IS_VM)
1143 return 0;
1144
1145 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1146 if (!reipl_block_nss)
1147 return -ENOMEM;
1148
1149 if (!diag308_set_works)
1150 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO;
1151
1152 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1153 if (rc)
1154 return rc;
1155
1156 reipl_block_ccw_init(reipl_block_nss);
1157 if (ipl_info.type == IPL_TYPE_NSS) {
1158 memset(reipl_block_nss->ipl_info.ccw.nss_name,
1159 ' ', NSS_NAME_SIZE);
1160 memcpy(reipl_block_nss->ipl_info.ccw.nss_name,
1161 kernel_nss_name, strlen(kernel_nss_name));
1162 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
1163 reipl_block_nss->ipl_info.ccw.vm_flags |=
1164 DIAG308_VM_FLAGS_NSS_VALID;
1165
1166 reipl_block_ccw_fill_parms(reipl_block_nss);
1167 }
1168
1169 reipl_capabilities |= IPL_TYPE_NSS;
1170 return 0;
1171 }
1172
1173 static int __init reipl_ccw_init(void)
1174 {
1175 int rc;
1176
1177 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1178 if (!reipl_block_ccw)
1179 return -ENOMEM;
1180
1181 if (MACHINE_IS_VM) {
1182 if (!diag308_set_works)
1183 sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
1184 rc = sysfs_create_group(&reipl_kset->kobj,
1185 &reipl_ccw_attr_group_vm);
1186 } else {
1187 if(!diag308_set_works)
1188 sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
1189 rc = sysfs_create_group(&reipl_kset->kobj,
1190 &reipl_ccw_attr_group_lpar);
1191 }
1192 if (rc)
1193 return rc;
1194
1195 reipl_block_ccw_init(reipl_block_ccw);
1196 if (ipl_info.type == IPL_TYPE_CCW) {
1197 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
1198 reipl_block_ccw_fill_parms(reipl_block_ccw);
1199 }
1200
1201 reipl_capabilities |= IPL_TYPE_CCW;
1202 return 0;
1203 }
1204
1205 static int __init reipl_fcp_init(void)
1206 {
1207 int rc;
1208
1209 if (!diag308_set_works) {
1210 if (ipl_info.type == IPL_TYPE_FCP) {
1211 make_attrs_ro(reipl_fcp_attrs);
1212 sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO;
1213 } else
1214 return 0;
1215 }
1216
1217 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1218 if (!reipl_block_fcp)
1219 return -ENOMEM;
1220
1221 /* sysfs: create fcp kset for mixing attr group and bin attrs */
1222 reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1223 &reipl_kset->kobj);
1224 if (!reipl_fcp_kset) {
1225 free_page((unsigned long) reipl_block_fcp);
1226 return -ENOMEM;
1227 }
1228
1229 rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1230 if (rc) {
1231 kset_unregister(reipl_fcp_kset);
1232 free_page((unsigned long) reipl_block_fcp);
1233 return rc;
1234 }
1235
1236 rc = sysfs_create_bin_file(&reipl_fcp_kset->kobj,
1237 &sys_reipl_fcp_scp_data_attr);
1238 if (rc) {
1239 sysfs_remove_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1240 kset_unregister(reipl_fcp_kset);
1241 free_page((unsigned long) reipl_block_fcp);
1242 return rc;
1243 }
1244
1245 if (ipl_info.type == IPL_TYPE_FCP)
1246 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
1247 else {
1248 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1249 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1250 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1251 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1252 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1253 }
1254 reipl_capabilities |= IPL_TYPE_FCP;
1255 return 0;
1256 }
1257
1258 static int __init reipl_init(void)
1259 {
1260 int rc;
1261
1262 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1263 if (!reipl_kset)
1264 return -ENOMEM;
1265 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1266 if (rc) {
1267 kset_unregister(reipl_kset);
1268 return rc;
1269 }
1270 rc = reipl_ccw_init();
1271 if (rc)
1272 return rc;
1273 rc = reipl_fcp_init();
1274 if (rc)
1275 return rc;
1276 rc = reipl_nss_init();
1277 if (rc)
1278 return rc;
1279 rc = reipl_set_type(ipl_info.type);
1280 if (rc)
1281 return rc;
1282 return 0;
1283 }
1284
1285 static struct shutdown_action __refdata reipl_action = {
1286 .name = SHUTDOWN_ACTION_REIPL_STR,
1287 .fn = reipl_run,
1288 .init = reipl_init,
1289 };
1290
1291 /*
1292 * dump shutdown action: Dump Linux on shutdown.
1293 */
1294
1295 /* FCP dump device attributes */
1296
1297 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n",
1298 dump_block_fcp->ipl_info.fcp.wwpn);
1299 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n",
1300 dump_block_fcp->ipl_info.fcp.lun);
1301 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1302 dump_block_fcp->ipl_info.fcp.bootprog);
1303 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1304 dump_block_fcp->ipl_info.fcp.br_lba);
1305 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1306 dump_block_fcp->ipl_info.fcp.devno);
1307
1308 static struct attribute *dump_fcp_attrs[] = {
1309 &sys_dump_fcp_device_attr.attr,
1310 &sys_dump_fcp_wwpn_attr.attr,
1311 &sys_dump_fcp_lun_attr.attr,
1312 &sys_dump_fcp_bootprog_attr.attr,
1313 &sys_dump_fcp_br_lba_attr.attr,
1314 NULL,
1315 };
1316
1317 static struct attribute_group dump_fcp_attr_group = {
1318 .name = IPL_FCP_STR,
1319 .attrs = dump_fcp_attrs,
1320 };
1321
1322 /* CCW dump device attributes */
1323
1324 DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
1325 dump_block_ccw->ipl_info.ccw.devno);
1326
1327 static struct attribute *dump_ccw_attrs[] = {
1328 &sys_dump_ccw_device_attr.attr,
1329 NULL,
1330 };
1331
1332 static struct attribute_group dump_ccw_attr_group = {
1333 .name = IPL_CCW_STR,
1334 .attrs = dump_ccw_attrs,
1335 };
1336
1337 /* dump type */
1338
1339 static int dump_set_type(enum dump_type type)
1340 {
1341 if (!(dump_capabilities & type))
1342 return -EINVAL;
1343 switch (type) {
1344 case DUMP_TYPE_CCW:
1345 if (diag308_set_works)
1346 dump_method = DUMP_METHOD_CCW_DIAG;
1347 else if (MACHINE_IS_VM)
1348 dump_method = DUMP_METHOD_CCW_VM;
1349 else
1350 dump_method = DUMP_METHOD_CCW_CIO;
1351 break;
1352 case DUMP_TYPE_FCP:
1353 dump_method = DUMP_METHOD_FCP_DIAG;
1354 break;
1355 default:
1356 dump_method = DUMP_METHOD_NONE;
1357 }
1358 dump_type = type;
1359 return 0;
1360 }
1361
1362 static ssize_t dump_type_show(struct kobject *kobj,
1363 struct kobj_attribute *attr, char *page)
1364 {
1365 return sprintf(page, "%s\n", dump_type_str(dump_type));
1366 }
1367
1368 static ssize_t dump_type_store(struct kobject *kobj,
1369 struct kobj_attribute *attr,
1370 const char *buf, size_t len)
1371 {
1372 int rc = -EINVAL;
1373
1374 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1375 rc = dump_set_type(DUMP_TYPE_NONE);
1376 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1377 rc = dump_set_type(DUMP_TYPE_CCW);
1378 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1379 rc = dump_set_type(DUMP_TYPE_FCP);
1380 return (rc != 0) ? rc : len;
1381 }
1382
1383 static struct kobj_attribute dump_type_attr =
1384 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1385
1386 static struct kset *dump_kset;
1387
1388 static void __dump_run(void *unused)
1389 {
1390 struct ccw_dev_id devid;
1391 static char buf[100];
1392
1393 switch (dump_method) {
1394 case DUMP_METHOD_CCW_CIO:
1395 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
1396 devid.ssid = 0;
1397 reipl_ccw_dev(&devid);
1398 break;
1399 case DUMP_METHOD_CCW_VM:
1400 sprintf(buf, "STORE STATUS");
1401 __cpcmd(buf, NULL, 0, NULL);
1402 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
1403 __cpcmd(buf, NULL, 0, NULL);
1404 break;
1405 case DUMP_METHOD_CCW_DIAG:
1406 diag308(DIAG308_SET, dump_block_ccw);
1407 diag308(DIAG308_DUMP, NULL);
1408 break;
1409 case DUMP_METHOD_FCP_DIAG:
1410 diag308(DIAG308_SET, dump_block_fcp);
1411 diag308(DIAG308_DUMP, NULL);
1412 break;
1413 default:
1414 break;
1415 }
1416 }
1417
1418 static void dump_run(struct shutdown_trigger *trigger)
1419 {
1420 if (dump_method == DUMP_METHOD_NONE)
1421 return;
1422 smp_send_stop();
1423 smp_switch_to_ipl_cpu(__dump_run, NULL);
1424 }
1425
1426 static int __init dump_ccw_init(void)
1427 {
1428 int rc;
1429
1430 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1431 if (!dump_block_ccw)
1432 return -ENOMEM;
1433 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1434 if (rc) {
1435 free_page((unsigned long)dump_block_ccw);
1436 return rc;
1437 }
1438 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1439 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1440 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1441 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1442 dump_capabilities |= DUMP_TYPE_CCW;
1443 return 0;
1444 }
1445
1446 static int __init dump_fcp_init(void)
1447 {
1448 int rc;
1449
1450 if (!sclp_ipl_info.has_dump)
1451 return 0; /* LDIPL DUMP is not installed */
1452 if (!diag308_set_works)
1453 return 0;
1454 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1455 if (!dump_block_fcp)
1456 return -ENOMEM;
1457 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1458 if (rc) {
1459 free_page((unsigned long)dump_block_fcp);
1460 return rc;
1461 }
1462 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1463 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1464 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1465 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1466 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1467 dump_capabilities |= DUMP_TYPE_FCP;
1468 return 0;
1469 }
1470
1471 static int __init dump_init(void)
1472 {
1473 int rc;
1474
1475 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1476 if (!dump_kset)
1477 return -ENOMEM;
1478 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1479 if (rc) {
1480 kset_unregister(dump_kset);
1481 return rc;
1482 }
1483 rc = dump_ccw_init();
1484 if (rc)
1485 return rc;
1486 rc = dump_fcp_init();
1487 if (rc)
1488 return rc;
1489 dump_set_type(DUMP_TYPE_NONE);
1490 return 0;
1491 }
1492
1493 static struct shutdown_action __refdata dump_action = {
1494 .name = SHUTDOWN_ACTION_DUMP_STR,
1495 .fn = dump_run,
1496 .init = dump_init,
1497 };
1498
1499 static void dump_reipl_run(struct shutdown_trigger *trigger)
1500 {
1501 preempt_disable();
1502 /*
1503 * Bypass dynamic address translation (DAT) when storing IPL parameter
1504 * information block address and checksum into the prefix area
1505 * (corresponding to absolute addresses 0-8191).
1506 * When enhanced DAT applies and the STE format control in one,
1507 * the absolute address is formed without prefixing. In this case a
1508 * normal store (stg/st) into the prefix area would no more match to
1509 * absolute addresses 0-8191.
1510 */
1511 #ifdef CONFIG_64BIT
1512 asm volatile("sturg %0,%1"
1513 :: "a" ((unsigned long) reipl_block_actual),
1514 "a" (&lowcore_ptr[smp_processor_id()]->ipib));
1515 #else
1516 asm volatile("stura %0,%1"
1517 :: "a" ((unsigned long) reipl_block_actual),
1518 "a" (&lowcore_ptr[smp_processor_id()]->ipib));
1519 #endif
1520 asm volatile("stura %0,%1"
1521 :: "a" (csum_partial(reipl_block_actual,
1522 reipl_block_actual->hdr.len, 0)),
1523 "a" (&lowcore_ptr[smp_processor_id()]->ipib_checksum));
1524 preempt_enable();
1525 dump_run(trigger);
1526 }
1527
1528 static int __init dump_reipl_init(void)
1529 {
1530 if (!diag308_set_works)
1531 return -EOPNOTSUPP;
1532 else
1533 return 0;
1534 }
1535
1536 static struct shutdown_action __refdata dump_reipl_action = {
1537 .name = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1538 .fn = dump_reipl_run,
1539 .init = dump_reipl_init,
1540 };
1541
1542 /*
1543 * vmcmd shutdown action: Trigger vm command on shutdown.
1544 */
1545
1546 static char vmcmd_on_reboot[128];
1547 static char vmcmd_on_panic[128];
1548 static char vmcmd_on_halt[128];
1549 static char vmcmd_on_poff[128];
1550 static char vmcmd_on_restart[128];
1551
1552 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1553 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1554 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1555 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1556 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1557
1558 static struct attribute *vmcmd_attrs[] = {
1559 &sys_vmcmd_on_reboot_attr.attr,
1560 &sys_vmcmd_on_panic_attr.attr,
1561 &sys_vmcmd_on_halt_attr.attr,
1562 &sys_vmcmd_on_poff_attr.attr,
1563 &sys_vmcmd_on_restart_attr.attr,
1564 NULL,
1565 };
1566
1567 static struct attribute_group vmcmd_attr_group = {
1568 .attrs = vmcmd_attrs,
1569 };
1570
1571 static struct kset *vmcmd_kset;
1572
1573 static void vmcmd_run(struct shutdown_trigger *trigger)
1574 {
1575 char *cmd, *next_cmd;
1576
1577 if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1578 cmd = vmcmd_on_reboot;
1579 else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1580 cmd = vmcmd_on_panic;
1581 else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1582 cmd = vmcmd_on_halt;
1583 else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1584 cmd = vmcmd_on_poff;
1585 else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
1586 cmd = vmcmd_on_restart;
1587 else
1588 return;
1589
1590 if (strlen(cmd) == 0)
1591 return;
1592 do {
1593 next_cmd = strchr(cmd, '\n');
1594 if (next_cmd) {
1595 next_cmd[0] = 0;
1596 next_cmd += 1;
1597 }
1598 __cpcmd(cmd, NULL, 0, NULL);
1599 cmd = next_cmd;
1600 } while (cmd != NULL);
1601 }
1602
1603 static int vmcmd_init(void)
1604 {
1605 if (!MACHINE_IS_VM)
1606 return -EOPNOTSUPP;
1607 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1608 if (!vmcmd_kset)
1609 return -ENOMEM;
1610 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1611 }
1612
1613 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1614 vmcmd_run, vmcmd_init};
1615
1616 /*
1617 * stop shutdown action: Stop Linux on shutdown.
1618 */
1619
1620 static void stop_run(struct shutdown_trigger *trigger)
1621 {
1622 if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
1623 strcmp(trigger->name, ON_RESTART_STR) == 0)
1624 disabled_wait((unsigned long) __builtin_return_address(0));
1625 while (sigp(smp_processor_id(), sigp_stop) == sigp_busy)
1626 cpu_relax();
1627 for (;;);
1628 }
1629
1630 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1631 stop_run, NULL};
1632
1633 /* action list */
1634
1635 static struct shutdown_action *shutdown_actions_list[] = {
1636 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1637 &vmcmd_action, &stop_action};
1638 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1639
1640 /*
1641 * Trigger section
1642 */
1643
1644 static struct kset *shutdown_actions_kset;
1645
1646 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1647 size_t len)
1648 {
1649 int i;
1650
1651 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1652 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1653 if (shutdown_actions_list[i]->init_rc) {
1654 return shutdown_actions_list[i]->init_rc;
1655 } else {
1656 trigger->action = shutdown_actions_list[i];
1657 return len;
1658 }
1659 }
1660 }
1661 return -EINVAL;
1662 }
1663
1664 /* on reipl */
1665
1666 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1667 &reipl_action};
1668
1669 static ssize_t on_reboot_show(struct kobject *kobj,
1670 struct kobj_attribute *attr, char *page)
1671 {
1672 return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1673 }
1674
1675 static ssize_t on_reboot_store(struct kobject *kobj,
1676 struct kobj_attribute *attr,
1677 const char *buf, size_t len)
1678 {
1679 return set_trigger(buf, &on_reboot_trigger, len);
1680 }
1681
1682 static struct kobj_attribute on_reboot_attr =
1683 __ATTR(on_reboot, 0644, on_reboot_show, on_reboot_store);
1684
1685 static void do_machine_restart(char *__unused)
1686 {
1687 smp_send_stop();
1688 on_reboot_trigger.action->fn(&on_reboot_trigger);
1689 reipl_run(NULL);
1690 }
1691 void (*_machine_restart)(char *command) = do_machine_restart;
1692
1693 /* on panic */
1694
1695 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1696
1697 static ssize_t on_panic_show(struct kobject *kobj,
1698 struct kobj_attribute *attr, char *page)
1699 {
1700 return sprintf(page, "%s\n", on_panic_trigger.action->name);
1701 }
1702
1703 static ssize_t on_panic_store(struct kobject *kobj,
1704 struct kobj_attribute *attr,
1705 const char *buf, size_t len)
1706 {
1707 return set_trigger(buf, &on_panic_trigger, len);
1708 }
1709
1710 static struct kobj_attribute on_panic_attr =
1711 __ATTR(on_panic, 0644, on_panic_show, on_panic_store);
1712
1713 static void do_panic(void)
1714 {
1715 on_panic_trigger.action->fn(&on_panic_trigger);
1716 stop_run(&on_panic_trigger);
1717 }
1718
1719 /* on restart */
1720
1721 static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
1722 &stop_action};
1723
1724 static ssize_t on_restart_show(struct kobject *kobj,
1725 struct kobj_attribute *attr, char *page)
1726 {
1727 return sprintf(page, "%s\n", on_restart_trigger.action->name);
1728 }
1729
1730 static ssize_t on_restart_store(struct kobject *kobj,
1731 struct kobj_attribute *attr,
1732 const char *buf, size_t len)
1733 {
1734 return set_trigger(buf, &on_restart_trigger, len);
1735 }
1736
1737 static struct kobj_attribute on_restart_attr =
1738 __ATTR(on_restart, 0644, on_restart_show, on_restart_store);
1739
1740 void do_restart(void)
1741 {
1742 smp_restart_with_online_cpu();
1743 smp_send_stop();
1744 #ifdef CONFIG_CRASH_DUMP
1745 crash_kexec(NULL);
1746 #endif
1747 on_restart_trigger.action->fn(&on_restart_trigger);
1748 stop_run(&on_restart_trigger);
1749 }
1750
1751 /* on halt */
1752
1753 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1754
1755 static ssize_t on_halt_show(struct kobject *kobj,
1756 struct kobj_attribute *attr, char *page)
1757 {
1758 return sprintf(page, "%s\n", on_halt_trigger.action->name);
1759 }
1760
1761 static ssize_t on_halt_store(struct kobject *kobj,
1762 struct kobj_attribute *attr,
1763 const char *buf, size_t len)
1764 {
1765 return set_trigger(buf, &on_halt_trigger, len);
1766 }
1767
1768 static struct kobj_attribute on_halt_attr =
1769 __ATTR(on_halt, 0644, on_halt_show, on_halt_store);
1770
1771
1772 static void do_machine_halt(void)
1773 {
1774 smp_send_stop();
1775 on_halt_trigger.action->fn(&on_halt_trigger);
1776 stop_run(&on_halt_trigger);
1777 }
1778 void (*_machine_halt)(void) = do_machine_halt;
1779
1780 /* on power off */
1781
1782 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1783
1784 static ssize_t on_poff_show(struct kobject *kobj,
1785 struct kobj_attribute *attr, char *page)
1786 {
1787 return sprintf(page, "%s\n", on_poff_trigger.action->name);
1788 }
1789
1790 static ssize_t on_poff_store(struct kobject *kobj,
1791 struct kobj_attribute *attr,
1792 const char *buf, size_t len)
1793 {
1794 return set_trigger(buf, &on_poff_trigger, len);
1795 }
1796
1797 static struct kobj_attribute on_poff_attr =
1798 __ATTR(on_poff, 0644, on_poff_show, on_poff_store);
1799
1800
1801 static void do_machine_power_off(void)
1802 {
1803 smp_send_stop();
1804 on_poff_trigger.action->fn(&on_poff_trigger);
1805 stop_run(&on_poff_trigger);
1806 }
1807 void (*_machine_power_off)(void) = do_machine_power_off;
1808
1809 static void __init shutdown_triggers_init(void)
1810 {
1811 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1812 firmware_kobj);
1813 if (!shutdown_actions_kset)
1814 goto fail;
1815 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1816 &on_reboot_attr.attr))
1817 goto fail;
1818 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1819 &on_panic_attr.attr))
1820 goto fail;
1821 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1822 &on_halt_attr.attr))
1823 goto fail;
1824 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1825 &on_poff_attr.attr))
1826 goto fail;
1827 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1828 &on_restart_attr.attr))
1829 goto fail;
1830 return;
1831 fail:
1832 panic("shutdown_triggers_init failed\n");
1833 }
1834
1835 static void __init shutdown_actions_init(void)
1836 {
1837 int i;
1838
1839 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1840 if (!shutdown_actions_list[i]->init)
1841 continue;
1842 shutdown_actions_list[i]->init_rc =
1843 shutdown_actions_list[i]->init();
1844 }
1845 }
1846
1847 static int __init s390_ipl_init(void)
1848 {
1849 sclp_get_ipl_info(&sclp_ipl_info);
1850 shutdown_actions_init();
1851 shutdown_triggers_init();
1852 return 0;
1853 }
1854
1855 __initcall(s390_ipl_init);
1856
1857 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1858 {
1859 int sx, dx;
1860
1861 dx = 0;
1862 for (sx = 0; src[sx] != 0; sx++) {
1863 if (src[sx] == '"')
1864 continue;
1865 dst[dx++] = src[sx];
1866 if (dx >= n)
1867 break;
1868 }
1869 }
1870
1871 static int __init vmcmd_on_reboot_setup(char *str)
1872 {
1873 if (!MACHINE_IS_VM)
1874 return 1;
1875 strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1876 vmcmd_on_reboot[127] = 0;
1877 on_reboot_trigger.action = &vmcmd_action;
1878 return 1;
1879 }
1880 __setup("vmreboot=", vmcmd_on_reboot_setup);
1881
1882 static int __init vmcmd_on_panic_setup(char *str)
1883 {
1884 if (!MACHINE_IS_VM)
1885 return 1;
1886 strncpy_skip_quote(vmcmd_on_panic, str, 127);
1887 vmcmd_on_panic[127] = 0;
1888 on_panic_trigger.action = &vmcmd_action;
1889 return 1;
1890 }
1891 __setup("vmpanic=", vmcmd_on_panic_setup);
1892
1893 static int __init vmcmd_on_halt_setup(char *str)
1894 {
1895 if (!MACHINE_IS_VM)
1896 return 1;
1897 strncpy_skip_quote(vmcmd_on_halt, str, 127);
1898 vmcmd_on_halt[127] = 0;
1899 on_halt_trigger.action = &vmcmd_action;
1900 return 1;
1901 }
1902 __setup("vmhalt=", vmcmd_on_halt_setup);
1903
1904 static int __init vmcmd_on_poff_setup(char *str)
1905 {
1906 if (!MACHINE_IS_VM)
1907 return 1;
1908 strncpy_skip_quote(vmcmd_on_poff, str, 127);
1909 vmcmd_on_poff[127] = 0;
1910 on_poff_trigger.action = &vmcmd_action;
1911 return 1;
1912 }
1913 __setup("vmpoff=", vmcmd_on_poff_setup);
1914
1915 static int on_panic_notify(struct notifier_block *self,
1916 unsigned long event, void *data)
1917 {
1918 do_panic();
1919 return NOTIFY_OK;
1920 }
1921
1922 static struct notifier_block on_panic_nb = {
1923 .notifier_call = on_panic_notify,
1924 .priority = INT_MIN,
1925 };
1926
1927 void __init setup_ipl(void)
1928 {
1929 ipl_info.type = get_ipl_type();
1930 switch (ipl_info.type) {
1931 case IPL_TYPE_CCW:
1932 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1933 ipl_info.data.ccw.dev_id.ssid = 0;
1934 break;
1935 case IPL_TYPE_FCP:
1936 case IPL_TYPE_FCP_DUMP:
1937 ipl_info.data.fcp.dev_id.devno =
1938 IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1939 ipl_info.data.fcp.dev_id.ssid = 0;
1940 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1941 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1942 break;
1943 case IPL_TYPE_NSS:
1944 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1945 sizeof(ipl_info.data.nss.name));
1946 break;
1947 case IPL_TYPE_UNKNOWN:
1948 /* We have no info to copy */
1949 break;
1950 }
1951 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1952 }
1953
1954 void __init ipl_update_parameters(void)
1955 {
1956 int rc;
1957
1958 rc = diag308(DIAG308_STORE, &ipl_block);
1959 if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
1960 diag308_set_works = 1;
1961 }
1962
1963 void __init ipl_save_parameters(void)
1964 {
1965 struct cio_iplinfo iplinfo;
1966 void *src, *dst;
1967
1968 if (cio_get_iplinfo(&iplinfo))
1969 return;
1970
1971 ipl_devno = iplinfo.devno;
1972 ipl_flags |= IPL_DEVNO_VALID;
1973 if (!iplinfo.is_qdio)
1974 return;
1975 ipl_flags |= IPL_PARMBLOCK_VALID;
1976 src = (void *)(unsigned long)S390_lowcore.ipl_parmblock_ptr;
1977 dst = (void *)IPL_PARMBLOCK_ORIGIN;
1978 memmove(dst, src, PAGE_SIZE);
1979 S390_lowcore.ipl_parmblock_ptr = IPL_PARMBLOCK_ORIGIN;
1980 }
1981
1982 static LIST_HEAD(rcall);
1983 static DEFINE_MUTEX(rcall_mutex);
1984
1985 void register_reset_call(struct reset_call *reset)
1986 {
1987 mutex_lock(&rcall_mutex);
1988 list_add(&reset->list, &rcall);
1989 mutex_unlock(&rcall_mutex);
1990 }
1991 EXPORT_SYMBOL_GPL(register_reset_call);
1992
1993 void unregister_reset_call(struct reset_call *reset)
1994 {
1995 mutex_lock(&rcall_mutex);
1996 list_del(&reset->list);
1997 mutex_unlock(&rcall_mutex);
1998 }
1999 EXPORT_SYMBOL_GPL(unregister_reset_call);
2000
2001 static void do_reset_calls(void)
2002 {
2003 struct reset_call *reset;
2004
2005 #ifdef CONFIG_64BIT
2006 if (diag308_set_works) {
2007 diag308_reset();
2008 return;
2009 }
2010 #endif
2011 list_for_each_entry(reset, &rcall, list)
2012 reset->fn();
2013 }
2014
2015 u32 dump_prefix_page;
2016
2017 void s390_reset_system(void)
2018 {
2019 struct _lowcore *lc;
2020
2021 lc = (struct _lowcore *)(unsigned long) store_prefix();
2022
2023 /* Stack for interrupt/machine check handler */
2024 lc->panic_stack = S390_lowcore.panic_stack;
2025
2026 /* Save prefix page address for dump case */
2027 dump_prefix_page = (u32)(unsigned long) lc;
2028
2029 /* Disable prefixing */
2030 set_prefix(0);
2031
2032 /* Disable lowcore protection */
2033 __ctl_clear_bit(0,28);
2034
2035 /* Set new machine check handler */
2036 S390_lowcore.mcck_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
2037 S390_lowcore.mcck_new_psw.addr =
2038 PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;
2039
2040 /* Set new program check handler */
2041 S390_lowcore.program_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
2042 S390_lowcore.program_new_psw.addr =
2043 PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
2044
2045 do_reset_calls();
2046 }
2047
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