projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
[S390] kernel: Add z/VM LGR detection
[deliverable/linux.git] / arch / s390 / kernel / ipl.c
1 /*
2 * arch/s390/kernel/ipl.c
3 * ipl/reipl/dump support for Linux on s390.
4 *
5 * Copyright IBM Corp. 2005,2012
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 <linux/debug_locks.h>
21 #include <asm/ipl.h>
22 #include <asm/smp.h>
23 #include <asm/setup.h>
24 #include <asm/cpcmd.h>
25 #include <asm/cio.h>
26 #include <asm/ebcdic.h>
27 #include <asm/reset.h>
28 #include <asm/sclp.h>
29 #include <asm/checksum.h>
30 #include <asm/debug.h>
31 #include "entry.h"
32
33 #define IPL_PARM_BLOCK_VERSION 0
34
35 #define IPL_UNKNOWN_STR "unknown"
36 #define IPL_CCW_STR "ccw"
37 #define IPL_FCP_STR "fcp"
38 #define IPL_FCP_DUMP_STR "fcp_dump"
39 #define IPL_NSS_STR "nss"
40
41 #define DUMP_CCW_STR "ccw"
42 #define DUMP_FCP_STR "fcp"
43 #define DUMP_NONE_STR "none"
44
45 /*
46 * Four shutdown trigger types are supported:
47 * - panic
48 * - halt
49 * - power off
50 * - reipl
51 * - restart
52 */
53 #define ON_PANIC_STR "on_panic"
54 #define ON_HALT_STR "on_halt"
55 #define ON_POFF_STR "on_poff"
56 #define ON_REIPL_STR "on_reboot"
57 #define ON_RESTART_STR "on_restart"
58
59 struct shutdown_action;
60 struct shutdown_trigger {
61 char *name;
62 struct shutdown_action *action;
63 };
64
65 /*
66 * The following shutdown action types are supported:
67 */
68 #define SHUTDOWN_ACTION_IPL_STR "ipl"
69 #define SHUTDOWN_ACTION_REIPL_STR "reipl"
70 #define SHUTDOWN_ACTION_DUMP_STR "dump"
71 #define SHUTDOWN_ACTION_VMCMD_STR "vmcmd"
72 #define SHUTDOWN_ACTION_STOP_STR "stop"
73 #define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl"
74
75 struct shutdown_action {
76 char *name;
77 void (*fn) (struct shutdown_trigger *trigger);
78 int (*init) (void);
79 int init_rc;
80 };
81
82 static char *ipl_type_str(enum ipl_type type)
83 {
84 switch (type) {
85 case IPL_TYPE_CCW:
86 return IPL_CCW_STR;
87 case IPL_TYPE_FCP:
88 return IPL_FCP_STR;
89 case IPL_TYPE_FCP_DUMP:
90 return IPL_FCP_DUMP_STR;
91 case IPL_TYPE_NSS:
92 return IPL_NSS_STR;
93 case IPL_TYPE_UNKNOWN:
94 default:
95 return IPL_UNKNOWN_STR;
96 }
97 }
98
99 enum dump_type {
100 DUMP_TYPE_NONE = 1,
101 DUMP_TYPE_CCW = 2,
102 DUMP_TYPE_FCP = 4,
103 };
104
105 static char *dump_type_str(enum dump_type type)
106 {
107 switch (type) {
108 case DUMP_TYPE_NONE:
109 return DUMP_NONE_STR;
110 case DUMP_TYPE_CCW:
111 return DUMP_CCW_STR;
112 case DUMP_TYPE_FCP:
113 return DUMP_FCP_STR;
114 default:
115 return NULL;
116 }
117 }
118
119 /*
120 * Must be in data section since the bss section
121 * is not cleared when these are accessed.
122 */
123 static u16 ipl_devno __attribute__((__section__(".data"))) = 0;
124 u32 ipl_flags __attribute__((__section__(".data"))) = 0;
125
126 enum ipl_method {
127 REIPL_METHOD_CCW_CIO,
128 REIPL_METHOD_CCW_DIAG,
129 REIPL_METHOD_CCW_VM,
130 REIPL_METHOD_FCP_RO_DIAG,
131 REIPL_METHOD_FCP_RW_DIAG,
132 REIPL_METHOD_FCP_RO_VM,
133 REIPL_METHOD_FCP_DUMP,
134 REIPL_METHOD_NSS,
135 REIPL_METHOD_NSS_DIAG,
136 REIPL_METHOD_DEFAULT,
137 };
138
139 enum dump_method {
140 DUMP_METHOD_NONE,
141 DUMP_METHOD_CCW_CIO,
142 DUMP_METHOD_CCW_DIAG,
143 DUMP_METHOD_CCW_VM,
144 DUMP_METHOD_FCP_DIAG,
145 };
146
147 static int diag308_set_works = 0;
148
149 static struct ipl_parameter_block ipl_block;
150
151 static int reipl_capabilities = IPL_TYPE_UNKNOWN;
152
153 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
154 static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
155 static struct ipl_parameter_block *reipl_block_fcp;
156 static struct ipl_parameter_block *reipl_block_ccw;
157 static struct ipl_parameter_block *reipl_block_nss;
158 static struct ipl_parameter_block *reipl_block_actual;
159
160 static int dump_capabilities = DUMP_TYPE_NONE;
161 static enum dump_type dump_type = DUMP_TYPE_NONE;
162 static enum dump_method dump_method = DUMP_METHOD_NONE;
163 static struct ipl_parameter_block *dump_block_fcp;
164 static struct ipl_parameter_block *dump_block_ccw;
165
166 static struct sclp_ipl_info sclp_ipl_info;
167
168 int diag308(unsigned long subcode, void *addr)
169 {
170 register unsigned long _addr asm("0") = (unsigned long) addr;
171 register unsigned long _rc asm("1") = 0;
172
173 asm volatile(
174 " diag %0,%2,0x308\n"
175 "0:\n"
176 EX_TABLE(0b,0b)
177 : "+d" (_addr), "+d" (_rc)
178 : "d" (subcode) : "cc", "memory");
179 return _rc;
180 }
181 EXPORT_SYMBOL_GPL(diag308);
182
183 /* SYSFS */
184
185 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
186 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
187 struct kobj_attribute *attr, \
188 char *page) \
189 { \
190 return sprintf(page, _format, _value); \
191 } \
192 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
193 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL);
194
195 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
196 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
197 struct kobj_attribute *attr, \
198 char *page) \
199 { \
200 return sprintf(page, _fmt_out, \
201 (unsigned long long) _value); \
202 } \
203 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
204 struct kobj_attribute *attr, \
205 const char *buf, size_t len) \
206 { \
207 unsigned long long value; \
208 if (sscanf(buf, _fmt_in, &value) != 1) \
209 return -EINVAL; \
210 _value = value; \
211 return len; \
212 } \
213 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
214 __ATTR(_name,(S_IRUGO | S_IWUSR), \
215 sys_##_prefix##_##_name##_show, \
216 sys_##_prefix##_##_name##_store);
217
218 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
219 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
220 struct kobj_attribute *attr, \
221 char *page) \
222 { \
223 return sprintf(page, _fmt_out, _value); \
224 } \
225 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
226 struct kobj_attribute *attr, \
227 const char *buf, size_t len) \
228 { \
229 strncpy(_value, buf, sizeof(_value) - 1); \
230 strim(_value); \
231 return len; \
232 } \
233 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
234 __ATTR(_name,(S_IRUGO | S_IWUSR), \
235 sys_##_prefix##_##_name##_show, \
236 sys_##_prefix##_##_name##_store);
237
238 static void make_attrs_ro(struct attribute **attrs)
239 {
240 while (*attrs) {
241 (*attrs)->mode = S_IRUGO;
242 attrs++;
243 }
244 }
245
246 /*
247 * ipl section
248 */
249
250 static __init enum ipl_type get_ipl_type(void)
251 {
252 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
253
254 if (ipl_flags & IPL_NSS_VALID)
255 return IPL_TYPE_NSS;
256 if (!(ipl_flags & IPL_DEVNO_VALID))
257 return IPL_TYPE_UNKNOWN;
258 if (!(ipl_flags & IPL_PARMBLOCK_VALID))
259 return IPL_TYPE_CCW;
260 if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
261 return IPL_TYPE_UNKNOWN;
262 if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
263 return IPL_TYPE_UNKNOWN;
264 if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
265 return IPL_TYPE_FCP_DUMP;
266 return IPL_TYPE_FCP;
267 }
268
269 struct ipl_info ipl_info;
270 EXPORT_SYMBOL_GPL(ipl_info);
271
272 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
273 char *page)
274 {
275 return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
276 }
277
278 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
279
280 /* VM IPL PARM routines */
281 static size_t reipl_get_ascii_vmparm(char *dest, size_t size,
282 const struct ipl_parameter_block *ipb)
283 {
284 int i;
285 size_t len;
286 char has_lowercase = 0;
287
288 len = 0;
289 if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
290 (ipb->ipl_info.ccw.vm_parm_len > 0)) {
291
292 len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
293 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
294 /* If at least one character is lowercase, we assume mixed
295 * case; otherwise we convert everything to lowercase.
296 */
297 for (i = 0; i < len; i++)
298 if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
299 (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
300 (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
301 has_lowercase = 1;
302 break;
303 }
304 if (!has_lowercase)
305 EBC_TOLOWER(dest, len);
306 EBCASC(dest, len);
307 }
308 dest[len] = 0;
309
310 return len;
311 }
312
313 size_t append_ipl_vmparm(char *dest, size_t size)
314 {
315 size_t rc;
316
317 rc = 0;
318 if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
319 rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
320 else
321 dest[0] = 0;
322 return rc;
323 }
324
325 static ssize_t ipl_vm_parm_show(struct kobject *kobj,
326 struct kobj_attribute *attr, char *page)
327 {
328 char parm[DIAG308_VMPARM_SIZE + 1] = {};
329
330 append_ipl_vmparm(parm, sizeof(parm));
331 return sprintf(page, "%s\n", parm);
332 }
333
334 static size_t scpdata_length(const char* buf, size_t count)
335 {
336 while (count) {
337 if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
338 break;
339 count--;
340 }
341 return count;
342 }
343
344 static size_t reipl_append_ascii_scpdata(char *dest, size_t size,
345 const struct ipl_parameter_block *ipb)
346 {
347 size_t count;
348 size_t i;
349 int has_lowercase;
350
351 count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data,
352 ipb->ipl_info.fcp.scp_data_len));
353 if (!count)
354 goto out;
355
356 has_lowercase = 0;
357 for (i = 0; i < count; i++) {
358 if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
359 count = 0;
360 goto out;
361 }
362 if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
363 has_lowercase = 1;
364 }
365
366 if (has_lowercase)
367 memcpy(dest, ipb->ipl_info.fcp.scp_data, count);
368 else
369 for (i = 0; i < count; i++)
370 dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]);
371 out:
372 dest[count] = '\0';
373 return count;
374 }
375
376 size_t append_ipl_scpdata(char *dest, size_t len)
377 {
378 size_t rc;
379
380 rc = 0;
381 if (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP)
382 rc = reipl_append_ascii_scpdata(dest, len, &ipl_block);
383 else
384 dest[0] = 0;
385 return rc;
386 }
387
388
389 static struct kobj_attribute sys_ipl_vm_parm_attr =
390 __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
391
392 static ssize_t sys_ipl_device_show(struct kobject *kobj,
393 struct kobj_attribute *attr, char *page)
394 {
395 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
396
397 switch (ipl_info.type) {
398 case IPL_TYPE_CCW:
399 return sprintf(page, "0.0.%04x\n", ipl_devno);
400 case IPL_TYPE_FCP:
401 case IPL_TYPE_FCP_DUMP:
402 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
403 default:
404 return 0;
405 }
406 }
407
408 static struct kobj_attribute sys_ipl_device_attr =
409 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
410
411 static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
412 struct bin_attribute *attr, char *buf,
413 loff_t off, size_t count)
414 {
415 return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START,
416 IPL_PARMBLOCK_SIZE);
417 }
418
419 static struct bin_attribute ipl_parameter_attr = {
420 .attr = {
421 .name = "binary_parameter",
422 .mode = S_IRUGO,
423 },
424 .size = PAGE_SIZE,
425 .read = &ipl_parameter_read,
426 };
427
428 static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
429 struct bin_attribute *attr, char *buf,
430 loff_t off, size_t count)
431 {
432 unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
433 void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
434
435 return memory_read_from_buffer(buf, count, &off, scp_data, size);
436 }
437
438 static struct bin_attribute ipl_scp_data_attr = {
439 .attr = {
440 .name = "scp_data",
441 .mode = S_IRUGO,
442 },
443 .size = PAGE_SIZE,
444 .read = ipl_scp_data_read,
445 };
446
447 /* FCP ipl device attributes */
448
449 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
450 IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
451 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
452 IPL_PARMBLOCK_START->ipl_info.fcp.lun);
453 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
454 IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
455 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
456 IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
457
458 static struct attribute *ipl_fcp_attrs[] = {
459 &sys_ipl_type_attr.attr,
460 &sys_ipl_device_attr.attr,
461 &sys_ipl_fcp_wwpn_attr.attr,
462 &sys_ipl_fcp_lun_attr.attr,
463 &sys_ipl_fcp_bootprog_attr.attr,
464 &sys_ipl_fcp_br_lba_attr.attr,
465 NULL,
466 };
467
468 static struct attribute_group ipl_fcp_attr_group = {
469 .attrs = ipl_fcp_attrs,
470 };
471
472 /* CCW ipl device attributes */
473
474 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
475 struct kobj_attribute *attr, char *page)
476 {
477 char loadparm[LOADPARM_LEN + 1] = {};
478
479 if (!sclp_ipl_info.is_valid)
480 return sprintf(page, "#unknown#\n");
481 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
482 EBCASC(loadparm, LOADPARM_LEN);
483 strim(loadparm);
484 return sprintf(page, "%s\n", loadparm);
485 }
486
487 static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
488 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
489
490 static struct attribute *ipl_ccw_attrs_vm[] = {
491 &sys_ipl_type_attr.attr,
492 &sys_ipl_device_attr.attr,
493 &sys_ipl_ccw_loadparm_attr.attr,
494 &sys_ipl_vm_parm_attr.attr,
495 NULL,
496 };
497
498 static struct attribute *ipl_ccw_attrs_lpar[] = {
499 &sys_ipl_type_attr.attr,
500 &sys_ipl_device_attr.attr,
501 &sys_ipl_ccw_loadparm_attr.attr,
502 NULL,
503 };
504
505 static struct attribute_group ipl_ccw_attr_group_vm = {
506 .attrs = ipl_ccw_attrs_vm,
507 };
508
509 static struct attribute_group ipl_ccw_attr_group_lpar = {
510 .attrs = ipl_ccw_attrs_lpar
511 };
512
513 /* NSS ipl device attributes */
514
515 DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
516
517 static struct attribute *ipl_nss_attrs[] = {
518 &sys_ipl_type_attr.attr,
519 &sys_ipl_nss_name_attr.attr,
520 &sys_ipl_ccw_loadparm_attr.attr,
521 &sys_ipl_vm_parm_attr.attr,
522 NULL,
523 };
524
525 static struct attribute_group ipl_nss_attr_group = {
526 .attrs = ipl_nss_attrs,
527 };
528
529 /* UNKNOWN ipl device attributes */
530
531 static struct attribute *ipl_unknown_attrs[] = {
532 &sys_ipl_type_attr.attr,
533 NULL,
534 };
535
536 static struct attribute_group ipl_unknown_attr_group = {
537 .attrs = ipl_unknown_attrs,
538 };
539
540 static struct kset *ipl_kset;
541
542 static int __init ipl_register_fcp_files(void)
543 {
544 int rc;
545
546 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
547 if (rc)
548 goto out;
549 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
550 if (rc)
551 goto out_ipl_parm;
552 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_scp_data_attr);
553 if (!rc)
554 goto out;
555
556 sysfs_remove_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
557
558 out_ipl_parm:
559 sysfs_remove_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
560 out:
561 return rc;
562 }
563
564 static void __ipl_run(void *unused)
565 {
566 diag308(DIAG308_IPL, NULL);
567 if (MACHINE_IS_VM)
568 __cpcmd("IPL", NULL, 0, NULL);
569 else if (ipl_info.type == IPL_TYPE_CCW)
570 reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
571 }
572
573 static void ipl_run(struct shutdown_trigger *trigger)
574 {
575 smp_call_ipl_cpu(__ipl_run, NULL);
576 }
577
578 static int __init ipl_init(void)
579 {
580 int rc;
581
582 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
583 if (!ipl_kset) {
584 rc = -ENOMEM;
585 goto out;
586 }
587 switch (ipl_info.type) {
588 case IPL_TYPE_CCW:
589 if (MACHINE_IS_VM)
590 rc = sysfs_create_group(&ipl_kset->kobj,
591 &ipl_ccw_attr_group_vm);
592 else
593 rc = sysfs_create_group(&ipl_kset->kobj,
594 &ipl_ccw_attr_group_lpar);
595 break;
596 case IPL_TYPE_FCP:
597 case IPL_TYPE_FCP_DUMP:
598 rc = ipl_register_fcp_files();
599 break;
600 case IPL_TYPE_NSS:
601 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group);
602 break;
603 default:
604 rc = sysfs_create_group(&ipl_kset->kobj,
605 &ipl_unknown_attr_group);
606 break;
607 }
608 out:
609 if (rc)
610 panic("ipl_init failed: rc = %i\n", rc);
611
612 return 0;
613 }
614
615 static struct shutdown_action __refdata ipl_action = {
616 .name = SHUTDOWN_ACTION_IPL_STR,
617 .fn = ipl_run,
618 .init = ipl_init,
619 };
620
621 /*
622 * reipl shutdown action: Reboot Linux on shutdown.
623 */
624
625 /* VM IPL PARM attributes */
626 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
627 char *page)
628 {
629 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
630
631 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
632 return sprintf(page, "%s\n", vmparm);
633 }
634
635 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
636 size_t vmparm_max,
637 const char *buf, size_t len)
638 {
639 int i, ip_len;
640
641 /* ignore trailing newline */
642 ip_len = len;
643 if ((len > 0) && (buf[len - 1] == '\n'))
644 ip_len--;
645
646 if (ip_len > vmparm_max)
647 return -EINVAL;
648
649 /* parm is used to store kernel options, check for common chars */
650 for (i = 0; i < ip_len; i++)
651 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
652 return -EINVAL;
653
654 memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
655 ipb->ipl_info.ccw.vm_parm_len = ip_len;
656 if (ip_len > 0) {
657 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
658 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
659 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
660 } else {
661 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
662 }
663
664 return len;
665 }
666
667 /* NSS wrapper */
668 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
669 struct kobj_attribute *attr, char *page)
670 {
671 return reipl_generic_vmparm_show(reipl_block_nss, page);
672 }
673
674 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
675 struct kobj_attribute *attr,
676 const char *buf, size_t len)
677 {
678 return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
679 }
680
681 /* CCW wrapper */
682 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
683 struct kobj_attribute *attr, char *page)
684 {
685 return reipl_generic_vmparm_show(reipl_block_ccw, page);
686 }
687
688 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
689 struct kobj_attribute *attr,
690 const char *buf, size_t len)
691 {
692 return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
693 }
694
695 static struct kobj_attribute sys_reipl_nss_vmparm_attr =
696 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
697 reipl_nss_vmparm_store);
698 static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
699 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
700 reipl_ccw_vmparm_store);
701
702 /* FCP reipl device attributes */
703
704 static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
705 struct bin_attribute *attr,
706 char *buf, loff_t off, size_t count)
707 {
708 size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
709 void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
710
711 return memory_read_from_buffer(buf, count, &off, scp_data, size);
712 }
713
714 static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
715 struct bin_attribute *attr,
716 char *buf, loff_t off, size_t count)
717 {
718 size_t padding;
719 size_t scpdata_len;
720
721 if (off < 0)
722 return -EINVAL;
723
724 if (off >= DIAG308_SCPDATA_SIZE)
725 return -ENOSPC;
726
727 if (count > DIAG308_SCPDATA_SIZE - off)
728 count = DIAG308_SCPDATA_SIZE - off;
729
730 memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf + off, count);
731 scpdata_len = off + count;
732
733 if (scpdata_len % 8) {
734 padding = 8 - (scpdata_len % 8);
735 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
736 0, padding);
737 scpdata_len += padding;
738 }
739
740 reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
741 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
742 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
743
744 return count;
745 }
746
747 static struct bin_attribute sys_reipl_fcp_scp_data_attr = {
748 .attr = {
749 .name = "scp_data",
750 .mode = S_IRUGO | S_IWUSR,
751 },
752 .size = PAGE_SIZE,
753 .read = reipl_fcp_scpdata_read,
754 .write = reipl_fcp_scpdata_write,
755 };
756
757 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n",
758 reipl_block_fcp->ipl_info.fcp.wwpn);
759 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n",
760 reipl_block_fcp->ipl_info.fcp.lun);
761 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
762 reipl_block_fcp->ipl_info.fcp.bootprog);
763 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
764 reipl_block_fcp->ipl_info.fcp.br_lba);
765 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
766 reipl_block_fcp->ipl_info.fcp.devno);
767
768 static struct attribute *reipl_fcp_attrs[] = {
769 &sys_reipl_fcp_device_attr.attr,
770 &sys_reipl_fcp_wwpn_attr.attr,
771 &sys_reipl_fcp_lun_attr.attr,
772 &sys_reipl_fcp_bootprog_attr.attr,
773 &sys_reipl_fcp_br_lba_attr.attr,
774 NULL,
775 };
776
777 static struct attribute_group reipl_fcp_attr_group = {
778 .attrs = reipl_fcp_attrs,
779 };
780
781 /* CCW reipl device attributes */
782
783 DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
784 reipl_block_ccw->ipl_info.ccw.devno);
785
786 static void reipl_get_ascii_loadparm(char *loadparm,
787 struct ipl_parameter_block *ibp)
788 {
789 memcpy(loadparm, ibp->ipl_info.ccw.load_parm, LOADPARM_LEN);
790 EBCASC(loadparm, LOADPARM_LEN);
791 loadparm[LOADPARM_LEN] = 0;
792 strim(loadparm);
793 }
794
795 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
796 char *page)
797 {
798 char buf[LOADPARM_LEN + 1];
799
800 reipl_get_ascii_loadparm(buf, ipb);
801 return sprintf(page, "%s\n", buf);
802 }
803
804 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
805 const char *buf, size_t len)
806 {
807 int i, lp_len;
808
809 /* ignore trailing newline */
810 lp_len = len;
811 if ((len > 0) && (buf[len - 1] == '\n'))
812 lp_len--;
813 /* loadparm can have max 8 characters and must not start with a blank */
814 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
815 return -EINVAL;
816 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
817 for (i = 0; i < lp_len; i++) {
818 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
819 (buf[i] == '.'))
820 continue;
821 return -EINVAL;
822 }
823 /* initialize loadparm with blanks */
824 memset(ipb->ipl_info.ccw.load_parm, ' ', LOADPARM_LEN);
825 /* copy and convert to ebcdic */
826 memcpy(ipb->ipl_info.ccw.load_parm, buf, lp_len);
827 ASCEBC(ipb->ipl_info.ccw.load_parm, LOADPARM_LEN);
828 return len;
829 }
830
831 /* NSS wrapper */
832 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
833 struct kobj_attribute *attr, char *page)
834 {
835 return reipl_generic_loadparm_show(reipl_block_nss, page);
836 }
837
838 static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
839 struct kobj_attribute *attr,
840 const char *buf, size_t len)
841 {
842 return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
843 }
844
845 /* CCW wrapper */
846 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
847 struct kobj_attribute *attr, char *page)
848 {
849 return reipl_generic_loadparm_show(reipl_block_ccw, page);
850 }
851
852 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
853 struct kobj_attribute *attr,
854 const char *buf, size_t len)
855 {
856 return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
857 }
858
859 static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
860 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
861 reipl_ccw_loadparm_store);
862
863 static struct attribute *reipl_ccw_attrs_vm[] = {
864 &sys_reipl_ccw_device_attr.attr,
865 &sys_reipl_ccw_loadparm_attr.attr,
866 &sys_reipl_ccw_vmparm_attr.attr,
867 NULL,
868 };
869
870 static struct attribute *reipl_ccw_attrs_lpar[] = {
871 &sys_reipl_ccw_device_attr.attr,
872 &sys_reipl_ccw_loadparm_attr.attr,
873 NULL,
874 };
875
876 static struct attribute_group reipl_ccw_attr_group_vm = {
877 .name = IPL_CCW_STR,
878 .attrs = reipl_ccw_attrs_vm,
879 };
880
881 static struct attribute_group reipl_ccw_attr_group_lpar = {
882 .name = IPL_CCW_STR,
883 .attrs = reipl_ccw_attrs_lpar,
884 };
885
886
887 /* NSS reipl device attributes */
888 static void reipl_get_ascii_nss_name(char *dst,
889 struct ipl_parameter_block *ipb)
890 {
891 memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
892 EBCASC(dst, NSS_NAME_SIZE);
893 dst[NSS_NAME_SIZE] = 0;
894 }
895
896 static ssize_t reipl_nss_name_show(struct kobject *kobj,
897 struct kobj_attribute *attr, char *page)
898 {
899 char nss_name[NSS_NAME_SIZE + 1] = {};
900
901 reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
902 return sprintf(page, "%s\n", nss_name);
903 }
904
905 static ssize_t reipl_nss_name_store(struct kobject *kobj,
906 struct kobj_attribute *attr,
907 const char *buf, size_t len)
908 {
909 int nss_len;
910
911 /* ignore trailing newline */
912 nss_len = len;
913 if ((len > 0) && (buf[len - 1] == '\n'))
914 nss_len--;
915
916 if (nss_len > NSS_NAME_SIZE)
917 return -EINVAL;
918
919 memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
920 if (nss_len > 0) {
921 reipl_block_nss->ipl_info.ccw.vm_flags |=
922 DIAG308_VM_FLAGS_NSS_VALID;
923 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
924 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
925 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
926 } else {
927 reipl_block_nss->ipl_info.ccw.vm_flags &=
928 ~DIAG308_VM_FLAGS_NSS_VALID;
929 }
930
931 return len;
932 }
933
934 static struct kobj_attribute sys_reipl_nss_name_attr =
935 __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
936 reipl_nss_name_store);
937
938 static struct kobj_attribute sys_reipl_nss_loadparm_attr =
939 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
940 reipl_nss_loadparm_store);
941
942 static struct attribute *reipl_nss_attrs[] = {
943 &sys_reipl_nss_name_attr.attr,
944 &sys_reipl_nss_loadparm_attr.attr,
945 &sys_reipl_nss_vmparm_attr.attr,
946 NULL,
947 };
948
949 static struct attribute_group reipl_nss_attr_group = {
950 .name = IPL_NSS_STR,
951 .attrs = reipl_nss_attrs,
952 };
953
954 /* reipl type */
955
956 static int reipl_set_type(enum ipl_type type)
957 {
958 if (!(reipl_capabilities & type))
959 return -EINVAL;
960
961 switch(type) {
962 case IPL_TYPE_CCW:
963 if (diag308_set_works)
964 reipl_method = REIPL_METHOD_CCW_DIAG;
965 else if (MACHINE_IS_VM)
966 reipl_method = REIPL_METHOD_CCW_VM;
967 else
968 reipl_method = REIPL_METHOD_CCW_CIO;
969 reipl_block_actual = reipl_block_ccw;
970 break;
971 case IPL_TYPE_FCP:
972 if (diag308_set_works)
973 reipl_method = REIPL_METHOD_FCP_RW_DIAG;
974 else if (MACHINE_IS_VM)
975 reipl_method = REIPL_METHOD_FCP_RO_VM;
976 else
977 reipl_method = REIPL_METHOD_FCP_RO_DIAG;
978 reipl_block_actual = reipl_block_fcp;
979 break;
980 case IPL_TYPE_FCP_DUMP:
981 reipl_method = REIPL_METHOD_FCP_DUMP;
982 break;
983 case IPL_TYPE_NSS:
984 if (diag308_set_works)
985 reipl_method = REIPL_METHOD_NSS_DIAG;
986 else
987 reipl_method = REIPL_METHOD_NSS;
988 reipl_block_actual = reipl_block_nss;
989 break;
990 case IPL_TYPE_UNKNOWN:
991 reipl_method = REIPL_METHOD_DEFAULT;
992 break;
993 default:
994 BUG();
995 }
996 reipl_type = type;
997 return 0;
998 }
999
1000 static ssize_t reipl_type_show(struct kobject *kobj,
1001 struct kobj_attribute *attr, char *page)
1002 {
1003 return sprintf(page, "%s\n", ipl_type_str(reipl_type));
1004 }
1005
1006 static ssize_t reipl_type_store(struct kobject *kobj,
1007 struct kobj_attribute *attr,
1008 const char *buf, size_t len)
1009 {
1010 int rc = -EINVAL;
1011
1012 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1013 rc = reipl_set_type(IPL_TYPE_CCW);
1014 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1015 rc = reipl_set_type(IPL_TYPE_FCP);
1016 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1017 rc = reipl_set_type(IPL_TYPE_NSS);
1018 return (rc != 0) ? rc : len;
1019 }
1020
1021 static struct kobj_attribute reipl_type_attr =
1022 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
1023
1024 static struct kset *reipl_kset;
1025 static struct kset *reipl_fcp_kset;
1026
1027 static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
1028 const enum ipl_method m)
1029 {
1030 char loadparm[LOADPARM_LEN + 1] = {};
1031 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
1032 char nss_name[NSS_NAME_SIZE + 1] = {};
1033 size_t pos = 0;
1034
1035 reipl_get_ascii_loadparm(loadparm, ipb);
1036 reipl_get_ascii_nss_name(nss_name, ipb);
1037 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
1038
1039 switch (m) {
1040 case REIPL_METHOD_CCW_VM:
1041 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
1042 break;
1043 case REIPL_METHOD_NSS:
1044 pos = sprintf(dst, "IPL %s", nss_name);
1045 break;
1046 default:
1047 break;
1048 }
1049 if (strlen(loadparm) > 0)
1050 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
1051 if (strlen(vmparm) > 0)
1052 sprintf(dst + pos, " PARM %s", vmparm);
1053 }
1054
1055 static void __reipl_run(void *unused)
1056 {
1057 struct ccw_dev_id devid;
1058 static char buf[128];
1059
1060 switch (reipl_method) {
1061 case REIPL_METHOD_CCW_CIO:
1062 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
1063 devid.ssid = 0;
1064 reipl_ccw_dev(&devid);
1065 break;
1066 case REIPL_METHOD_CCW_VM:
1067 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
1068 __cpcmd(buf, NULL, 0, NULL);
1069 break;
1070 case REIPL_METHOD_CCW_DIAG:
1071 diag308(DIAG308_SET, reipl_block_ccw);
1072 diag308(DIAG308_IPL, NULL);
1073 break;
1074 case REIPL_METHOD_FCP_RW_DIAG:
1075 diag308(DIAG308_SET, reipl_block_fcp);
1076 diag308(DIAG308_IPL, NULL);
1077 break;
1078 case REIPL_METHOD_FCP_RO_DIAG:
1079 diag308(DIAG308_IPL, NULL);
1080 break;
1081 case REIPL_METHOD_FCP_RO_VM:
1082 __cpcmd("IPL", NULL, 0, NULL);
1083 break;
1084 case REIPL_METHOD_NSS_DIAG:
1085 diag308(DIAG308_SET, reipl_block_nss);
1086 diag308(DIAG308_IPL, NULL);
1087 break;
1088 case REIPL_METHOD_NSS:
1089 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
1090 __cpcmd(buf, NULL, 0, NULL);
1091 break;
1092 case REIPL_METHOD_DEFAULT:
1093 if (MACHINE_IS_VM)
1094 __cpcmd("IPL", NULL, 0, NULL);
1095 diag308(DIAG308_IPL, NULL);
1096 break;
1097 case REIPL_METHOD_FCP_DUMP:
1098 break;
1099 }
1100 disabled_wait((unsigned long) __builtin_return_address(0));
1101 }
1102
1103 static void reipl_run(struct shutdown_trigger *trigger)
1104 {
1105 smp_call_ipl_cpu(__reipl_run, NULL);
1106 }
1107
1108 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
1109 {
1110 ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
1111 ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1112 ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1113 ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1114 }
1115
1116 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1117 {
1118 /* LOADPARM */
1119 /* check if read scp info worked and set loadparm */
1120 if (sclp_ipl_info.is_valid)
1121 memcpy(ipb->ipl_info.ccw.load_parm,
1122 &sclp_ipl_info.loadparm, LOADPARM_LEN);
1123 else
1124 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1125 memset(ipb->ipl_info.ccw.load_parm, 0x40, LOADPARM_LEN);
1126 ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
1127
1128 /* VM PARM */
1129 if (MACHINE_IS_VM && diag308_set_works &&
1130 (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1131
1132 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1133 ipb->ipl_info.ccw.vm_parm_len =
1134 ipl_block.ipl_info.ccw.vm_parm_len;
1135 memcpy(ipb->ipl_info.ccw.vm_parm,
1136 ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1137 }
1138 }
1139
1140 static int __init reipl_nss_init(void)
1141 {
1142 int rc;
1143
1144 if (!MACHINE_IS_VM)
1145 return 0;
1146
1147 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1148 if (!reipl_block_nss)
1149 return -ENOMEM;
1150
1151 if (!diag308_set_works)
1152 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO;
1153
1154 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1155 if (rc)
1156 return rc;
1157
1158 reipl_block_ccw_init(reipl_block_nss);
1159 if (ipl_info.type == IPL_TYPE_NSS) {
1160 memset(reipl_block_nss->ipl_info.ccw.nss_name,
1161 ' ', NSS_NAME_SIZE);
1162 memcpy(reipl_block_nss->ipl_info.ccw.nss_name,
1163 kernel_nss_name, strlen(kernel_nss_name));
1164 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
1165 reipl_block_nss->ipl_info.ccw.vm_flags |=
1166 DIAG308_VM_FLAGS_NSS_VALID;
1167
1168 reipl_block_ccw_fill_parms(reipl_block_nss);
1169 }
1170
1171 reipl_capabilities |= IPL_TYPE_NSS;
1172 return 0;
1173 }
1174
1175 static int __init reipl_ccw_init(void)
1176 {
1177 int rc;
1178
1179 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1180 if (!reipl_block_ccw)
1181 return -ENOMEM;
1182
1183 if (MACHINE_IS_VM) {
1184 if (!diag308_set_works)
1185 sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
1186 rc = sysfs_create_group(&reipl_kset->kobj,
1187 &reipl_ccw_attr_group_vm);
1188 } else {
1189 if(!diag308_set_works)
1190 sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
1191 rc = sysfs_create_group(&reipl_kset->kobj,
1192 &reipl_ccw_attr_group_lpar);
1193 }
1194 if (rc)
1195 return rc;
1196
1197 reipl_block_ccw_init(reipl_block_ccw);
1198 if (ipl_info.type == IPL_TYPE_CCW) {
1199 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
1200 reipl_block_ccw_fill_parms(reipl_block_ccw);
1201 }
1202
1203 reipl_capabilities |= IPL_TYPE_CCW;
1204 return 0;
1205 }
1206
1207 static int __init reipl_fcp_init(void)
1208 {
1209 int rc;
1210
1211 if (!diag308_set_works) {
1212 if (ipl_info.type == IPL_TYPE_FCP) {
1213 make_attrs_ro(reipl_fcp_attrs);
1214 sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO;
1215 } else
1216 return 0;
1217 }
1218
1219 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1220 if (!reipl_block_fcp)
1221 return -ENOMEM;
1222
1223 /* sysfs: create fcp kset for mixing attr group and bin attrs */
1224 reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1225 &reipl_kset->kobj);
1226 if (!reipl_fcp_kset) {
1227 free_page((unsigned long) reipl_block_fcp);
1228 return -ENOMEM;
1229 }
1230
1231 rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1232 if (rc) {
1233 kset_unregister(reipl_fcp_kset);
1234 free_page((unsigned long) reipl_block_fcp);
1235 return rc;
1236 }
1237
1238 rc = sysfs_create_bin_file(&reipl_fcp_kset->kobj,
1239 &sys_reipl_fcp_scp_data_attr);
1240 if (rc) {
1241 sysfs_remove_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1242 kset_unregister(reipl_fcp_kset);
1243 free_page((unsigned long) reipl_block_fcp);
1244 return rc;
1245 }
1246
1247 if (ipl_info.type == IPL_TYPE_FCP)
1248 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
1249 else {
1250 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1251 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1252 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1253 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1254 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1255 }
1256 reipl_capabilities |= IPL_TYPE_FCP;
1257 return 0;
1258 }
1259
1260 static int __init reipl_init(void)
1261 {
1262 int rc;
1263
1264 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1265 if (!reipl_kset)
1266 return -ENOMEM;
1267 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1268 if (rc) {
1269 kset_unregister(reipl_kset);
1270 return rc;
1271 }
1272 rc = reipl_ccw_init();
1273 if (rc)
1274 return rc;
1275 rc = reipl_fcp_init();
1276 if (rc)
1277 return rc;
1278 rc = reipl_nss_init();
1279 if (rc)
1280 return rc;
1281 rc = reipl_set_type(ipl_info.type);
1282 if (rc)
1283 return rc;
1284 return 0;
1285 }
1286
1287 static struct shutdown_action __refdata reipl_action = {
1288 .name = SHUTDOWN_ACTION_REIPL_STR,
1289 .fn = reipl_run,
1290 .init = reipl_init,
1291 };
1292
1293 /*
1294 * dump shutdown action: Dump Linux on shutdown.
1295 */
1296
1297 /* FCP dump device attributes */
1298
1299 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n",
1300 dump_block_fcp->ipl_info.fcp.wwpn);
1301 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n",
1302 dump_block_fcp->ipl_info.fcp.lun);
1303 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1304 dump_block_fcp->ipl_info.fcp.bootprog);
1305 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1306 dump_block_fcp->ipl_info.fcp.br_lba);
1307 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1308 dump_block_fcp->ipl_info.fcp.devno);
1309
1310 static struct attribute *dump_fcp_attrs[] = {
1311 &sys_dump_fcp_device_attr.attr,
1312 &sys_dump_fcp_wwpn_attr.attr,
1313 &sys_dump_fcp_lun_attr.attr,
1314 &sys_dump_fcp_bootprog_attr.attr,
1315 &sys_dump_fcp_br_lba_attr.attr,
1316 NULL,
1317 };
1318
1319 static struct attribute_group dump_fcp_attr_group = {
1320 .name = IPL_FCP_STR,
1321 .attrs = dump_fcp_attrs,
1322 };
1323
1324 /* CCW dump device attributes */
1325
1326 DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
1327 dump_block_ccw->ipl_info.ccw.devno);
1328
1329 static struct attribute *dump_ccw_attrs[] = {
1330 &sys_dump_ccw_device_attr.attr,
1331 NULL,
1332 };
1333
1334 static struct attribute_group dump_ccw_attr_group = {
1335 .name = IPL_CCW_STR,
1336 .attrs = dump_ccw_attrs,
1337 };
1338
1339 /* dump type */
1340
1341 static int dump_set_type(enum dump_type type)
1342 {
1343 if (!(dump_capabilities & type))
1344 return -EINVAL;
1345 switch (type) {
1346 case DUMP_TYPE_CCW:
1347 if (diag308_set_works)
1348 dump_method = DUMP_METHOD_CCW_DIAG;
1349 else if (MACHINE_IS_VM)
1350 dump_method = DUMP_METHOD_CCW_VM;
1351 else
1352 dump_method = DUMP_METHOD_CCW_CIO;
1353 break;
1354 case DUMP_TYPE_FCP:
1355 dump_method = DUMP_METHOD_FCP_DIAG;
1356 break;
1357 default:
1358 dump_method = DUMP_METHOD_NONE;
1359 }
1360 dump_type = type;
1361 return 0;
1362 }
1363
1364 static ssize_t dump_type_show(struct kobject *kobj,
1365 struct kobj_attribute *attr, char *page)
1366 {
1367 return sprintf(page, "%s\n", dump_type_str(dump_type));
1368 }
1369
1370 static ssize_t dump_type_store(struct kobject *kobj,
1371 struct kobj_attribute *attr,
1372 const char *buf, size_t len)
1373 {
1374 int rc = -EINVAL;
1375
1376 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1377 rc = dump_set_type(DUMP_TYPE_NONE);
1378 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1379 rc = dump_set_type(DUMP_TYPE_CCW);
1380 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1381 rc = dump_set_type(DUMP_TYPE_FCP);
1382 return (rc != 0) ? rc : len;
1383 }
1384
1385 static struct kobj_attribute dump_type_attr =
1386 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1387
1388 static struct kset *dump_kset;
1389
1390 static void __dump_run(void *unused)
1391 {
1392 struct ccw_dev_id devid;
1393 static char buf[100];
1394
1395 switch (dump_method) {
1396 case DUMP_METHOD_CCW_CIO:
1397 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
1398 devid.ssid = 0;
1399 reipl_ccw_dev(&devid);
1400 break;
1401 case DUMP_METHOD_CCW_VM:
1402 sprintf(buf, "STORE STATUS");
1403 __cpcmd(buf, NULL, 0, NULL);
1404 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
1405 __cpcmd(buf, NULL, 0, NULL);
1406 break;
1407 case DUMP_METHOD_CCW_DIAG:
1408 diag308(DIAG308_SET, dump_block_ccw);
1409 diag308(DIAG308_DUMP, NULL);
1410 break;
1411 case DUMP_METHOD_FCP_DIAG:
1412 diag308(DIAG308_SET, dump_block_fcp);
1413 diag308(DIAG308_DUMP, NULL);
1414 break;
1415 default:
1416 break;
1417 }
1418 }
1419
1420 static void dump_run(struct shutdown_trigger *trigger)
1421 {
1422 if (dump_method == DUMP_METHOD_NONE)
1423 return;
1424 smp_send_stop();
1425 smp_call_ipl_cpu(__dump_run, NULL);
1426 }
1427
1428 static int __init dump_ccw_init(void)
1429 {
1430 int rc;
1431
1432 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1433 if (!dump_block_ccw)
1434 return -ENOMEM;
1435 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1436 if (rc) {
1437 free_page((unsigned long)dump_block_ccw);
1438 return rc;
1439 }
1440 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1441 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1442 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1443 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1444 dump_capabilities |= DUMP_TYPE_CCW;
1445 return 0;
1446 }
1447
1448 static int __init dump_fcp_init(void)
1449 {
1450 int rc;
1451
1452 if (!sclp_ipl_info.has_dump)
1453 return 0; /* LDIPL DUMP is not installed */
1454 if (!diag308_set_works)
1455 return 0;
1456 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1457 if (!dump_block_fcp)
1458 return -ENOMEM;
1459 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1460 if (rc) {
1461 free_page((unsigned long)dump_block_fcp);
1462 return rc;
1463 }
1464 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1465 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1466 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1467 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1468 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1469 dump_capabilities |= DUMP_TYPE_FCP;
1470 return 0;
1471 }
1472
1473 static int __init dump_init(void)
1474 {
1475 int rc;
1476
1477 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1478 if (!dump_kset)
1479 return -ENOMEM;
1480 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1481 if (rc) {
1482 kset_unregister(dump_kset);
1483 return rc;
1484 }
1485 rc = dump_ccw_init();
1486 if (rc)
1487 return rc;
1488 rc = dump_fcp_init();
1489 if (rc)
1490 return rc;
1491 dump_set_type(DUMP_TYPE_NONE);
1492 return 0;
1493 }
1494
1495 static struct shutdown_action __refdata dump_action = {
1496 .name = SHUTDOWN_ACTION_DUMP_STR,
1497 .fn = dump_run,
1498 .init = dump_init,
1499 };
1500
1501 static void dump_reipl_run(struct shutdown_trigger *trigger)
1502 {
1503 u32 csum;
1504
1505 csum = csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
1506 copy_to_absolute_zero(&S390_lowcore.ipib_checksum, &csum, sizeof(csum));
1507 copy_to_absolute_zero(&S390_lowcore.ipib, &reipl_block_actual,
1508 sizeof(reipl_block_actual));
1509 dump_run(trigger);
1510 }
1511
1512 static int __init dump_reipl_init(void)
1513 {
1514 if (!diag308_set_works)
1515 return -EOPNOTSUPP;
1516 else
1517 return 0;
1518 }
1519
1520 static struct shutdown_action __refdata dump_reipl_action = {
1521 .name = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1522 .fn = dump_reipl_run,
1523 .init = dump_reipl_init,
1524 };
1525
1526 /*
1527 * vmcmd shutdown action: Trigger vm command on shutdown.
1528 */
1529
1530 static char vmcmd_on_reboot[128];
1531 static char vmcmd_on_panic[128];
1532 static char vmcmd_on_halt[128];
1533 static char vmcmd_on_poff[128];
1534 static char vmcmd_on_restart[128];
1535
1536 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1537 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1538 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1539 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1540 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1541
1542 static struct attribute *vmcmd_attrs[] = {
1543 &sys_vmcmd_on_reboot_attr.attr,
1544 &sys_vmcmd_on_panic_attr.attr,
1545 &sys_vmcmd_on_halt_attr.attr,
1546 &sys_vmcmd_on_poff_attr.attr,
1547 &sys_vmcmd_on_restart_attr.attr,
1548 NULL,
1549 };
1550
1551 static struct attribute_group vmcmd_attr_group = {
1552 .attrs = vmcmd_attrs,
1553 };
1554
1555 static struct kset *vmcmd_kset;
1556
1557 static void vmcmd_run(struct shutdown_trigger *trigger)
1558 {
1559 char *cmd, *next_cmd;
1560
1561 if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1562 cmd = vmcmd_on_reboot;
1563 else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1564 cmd = vmcmd_on_panic;
1565 else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1566 cmd = vmcmd_on_halt;
1567 else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1568 cmd = vmcmd_on_poff;
1569 else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
1570 cmd = vmcmd_on_restart;
1571 else
1572 return;
1573
1574 if (strlen(cmd) == 0)
1575 return;
1576 do {
1577 next_cmd = strchr(cmd, '\n');
1578 if (next_cmd) {
1579 next_cmd[0] = 0;
1580 next_cmd += 1;
1581 }
1582 __cpcmd(cmd, NULL, 0, NULL);
1583 cmd = next_cmd;
1584 } while (cmd != NULL);
1585 }
1586
1587 static int vmcmd_init(void)
1588 {
1589 if (!MACHINE_IS_VM)
1590 return -EOPNOTSUPP;
1591 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1592 if (!vmcmd_kset)
1593 return -ENOMEM;
1594 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1595 }
1596
1597 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1598 vmcmd_run, vmcmd_init};
1599
1600 /*
1601 * stop shutdown action: Stop Linux on shutdown.
1602 */
1603
1604 static void stop_run(struct shutdown_trigger *trigger)
1605 {
1606 if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
1607 strcmp(trigger->name, ON_RESTART_STR) == 0)
1608 disabled_wait((unsigned long) __builtin_return_address(0));
1609 smp_stop_cpu();
1610 }
1611
1612 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1613 stop_run, NULL};
1614
1615 /* action list */
1616
1617 static struct shutdown_action *shutdown_actions_list[] = {
1618 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1619 &vmcmd_action, &stop_action};
1620 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1621
1622 /*
1623 * Trigger section
1624 */
1625
1626 static struct kset *shutdown_actions_kset;
1627
1628 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1629 size_t len)
1630 {
1631 int i;
1632
1633 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1634 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1635 if (shutdown_actions_list[i]->init_rc) {
1636 return shutdown_actions_list[i]->init_rc;
1637 } else {
1638 trigger->action = shutdown_actions_list[i];
1639 return len;
1640 }
1641 }
1642 }
1643 return -EINVAL;
1644 }
1645
1646 /* on reipl */
1647
1648 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1649 &reipl_action};
1650
1651 static ssize_t on_reboot_show(struct kobject *kobj,
1652 struct kobj_attribute *attr, char *page)
1653 {
1654 return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1655 }
1656
1657 static ssize_t on_reboot_store(struct kobject *kobj,
1658 struct kobj_attribute *attr,
1659 const char *buf, size_t len)
1660 {
1661 return set_trigger(buf, &on_reboot_trigger, len);
1662 }
1663
1664 static struct kobj_attribute on_reboot_attr =
1665 __ATTR(on_reboot, 0644, on_reboot_show, on_reboot_store);
1666
1667 static void do_machine_restart(char *__unused)
1668 {
1669 smp_send_stop();
1670 on_reboot_trigger.action->fn(&on_reboot_trigger);
1671 reipl_run(NULL);
1672 }
1673 void (*_machine_restart)(char *command) = do_machine_restart;
1674
1675 /* on panic */
1676
1677 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1678
1679 static ssize_t on_panic_show(struct kobject *kobj,
1680 struct kobj_attribute *attr, char *page)
1681 {
1682 return sprintf(page, "%s\n", on_panic_trigger.action->name);
1683 }
1684
1685 static ssize_t on_panic_store(struct kobject *kobj,
1686 struct kobj_attribute *attr,
1687 const char *buf, size_t len)
1688 {
1689 return set_trigger(buf, &on_panic_trigger, len);
1690 }
1691
1692 static struct kobj_attribute on_panic_attr =
1693 __ATTR(on_panic, 0644, on_panic_show, on_panic_store);
1694
1695 static void do_panic(void)
1696 {
1697 lgr_info_log();
1698 on_panic_trigger.action->fn(&on_panic_trigger);
1699 stop_run(&on_panic_trigger);
1700 }
1701
1702 /* on restart */
1703
1704 static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
1705 &stop_action};
1706
1707 static ssize_t on_restart_show(struct kobject *kobj,
1708 struct kobj_attribute *attr, char *page)
1709 {
1710 return sprintf(page, "%s\n", on_restart_trigger.action->name);
1711 }
1712
1713 static ssize_t on_restart_store(struct kobject *kobj,
1714 struct kobj_attribute *attr,
1715 const char *buf, size_t len)
1716 {
1717 return set_trigger(buf, &on_restart_trigger, len);
1718 }
1719
1720 static struct kobj_attribute on_restart_attr =
1721 __ATTR(on_restart, 0644, on_restart_show, on_restart_store);
1722
1723 static void __do_restart(void *ignore)
1724 {
1725 smp_send_stop();
1726 #ifdef CONFIG_CRASH_DUMP
1727 crash_kexec(NULL);
1728 #endif
1729 on_restart_trigger.action->fn(&on_restart_trigger);
1730 stop_run(&on_restart_trigger);
1731 }
1732
1733 void do_restart(void)
1734 {
1735 tracing_off();
1736 debug_locks_off();
1737 lgr_info_log();
1738 smp_call_online_cpu(__do_restart, NULL);
1739 }
1740
1741 /* on halt */
1742
1743 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1744
1745 static ssize_t on_halt_show(struct kobject *kobj,
1746 struct kobj_attribute *attr, char *page)
1747 {
1748 return sprintf(page, "%s\n", on_halt_trigger.action->name);
1749 }
1750
1751 static ssize_t on_halt_store(struct kobject *kobj,
1752 struct kobj_attribute *attr,
1753 const char *buf, size_t len)
1754 {
1755 return set_trigger(buf, &on_halt_trigger, len);
1756 }
1757
1758 static struct kobj_attribute on_halt_attr =
1759 __ATTR(on_halt, 0644, on_halt_show, on_halt_store);
1760
1761
1762 static void do_machine_halt(void)
1763 {
1764 smp_send_stop();
1765 on_halt_trigger.action->fn(&on_halt_trigger);
1766 stop_run(&on_halt_trigger);
1767 }
1768 void (*_machine_halt)(void) = do_machine_halt;
1769
1770 /* on power off */
1771
1772 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1773
1774 static ssize_t on_poff_show(struct kobject *kobj,
1775 struct kobj_attribute *attr, char *page)
1776 {
1777 return sprintf(page, "%s\n", on_poff_trigger.action->name);
1778 }
1779
1780 static ssize_t on_poff_store(struct kobject *kobj,
1781 struct kobj_attribute *attr,
1782 const char *buf, size_t len)
1783 {
1784 return set_trigger(buf, &on_poff_trigger, len);
1785 }
1786
1787 static struct kobj_attribute on_poff_attr =
1788 __ATTR(on_poff, 0644, on_poff_show, on_poff_store);
1789
1790
1791 static void do_machine_power_off(void)
1792 {
1793 smp_send_stop();
1794 on_poff_trigger.action->fn(&on_poff_trigger);
1795 stop_run(&on_poff_trigger);
1796 }
1797 void (*_machine_power_off)(void) = do_machine_power_off;
1798
1799 static void __init shutdown_triggers_init(void)
1800 {
1801 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1802 firmware_kobj);
1803 if (!shutdown_actions_kset)
1804 goto fail;
1805 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1806 &on_reboot_attr.attr))
1807 goto fail;
1808 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1809 &on_panic_attr.attr))
1810 goto fail;
1811 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1812 &on_halt_attr.attr))
1813 goto fail;
1814 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1815 &on_poff_attr.attr))
1816 goto fail;
1817 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1818 &on_restart_attr.attr))
1819 goto fail;
1820 return;
1821 fail:
1822 panic("shutdown_triggers_init failed\n");
1823 }
1824
1825 static void __init shutdown_actions_init(void)
1826 {
1827 int i;
1828
1829 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1830 if (!shutdown_actions_list[i]->init)
1831 continue;
1832 shutdown_actions_list[i]->init_rc =
1833 shutdown_actions_list[i]->init();
1834 }
1835 }
1836
1837 static int __init s390_ipl_init(void)
1838 {
1839 sclp_get_ipl_info(&sclp_ipl_info);
1840 shutdown_actions_init();
1841 shutdown_triggers_init();
1842 return 0;
1843 }
1844
1845 __initcall(s390_ipl_init);
1846
1847 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1848 {
1849 int sx, dx;
1850
1851 dx = 0;
1852 for (sx = 0; src[sx] != 0; sx++) {
1853 if (src[sx] == '"')
1854 continue;
1855 dst[dx++] = src[sx];
1856 if (dx >= n)
1857 break;
1858 }
1859 }
1860
1861 static int __init vmcmd_on_reboot_setup(char *str)
1862 {
1863 if (!MACHINE_IS_VM)
1864 return 1;
1865 strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1866 vmcmd_on_reboot[127] = 0;
1867 on_reboot_trigger.action = &vmcmd_action;
1868 return 1;
1869 }
1870 __setup("vmreboot=", vmcmd_on_reboot_setup);
1871
1872 static int __init vmcmd_on_panic_setup(char *str)
1873 {
1874 if (!MACHINE_IS_VM)
1875 return 1;
1876 strncpy_skip_quote(vmcmd_on_panic, str, 127);
1877 vmcmd_on_panic[127] = 0;
1878 on_panic_trigger.action = &vmcmd_action;
1879 return 1;
1880 }
1881 __setup("vmpanic=", vmcmd_on_panic_setup);
1882
1883 static int __init vmcmd_on_halt_setup(char *str)
1884 {
1885 if (!MACHINE_IS_VM)
1886 return 1;
1887 strncpy_skip_quote(vmcmd_on_halt, str, 127);
1888 vmcmd_on_halt[127] = 0;
1889 on_halt_trigger.action = &vmcmd_action;
1890 return 1;
1891 }
1892 __setup("vmhalt=", vmcmd_on_halt_setup);
1893
1894 static int __init vmcmd_on_poff_setup(char *str)
1895 {
1896 if (!MACHINE_IS_VM)
1897 return 1;
1898 strncpy_skip_quote(vmcmd_on_poff, str, 127);
1899 vmcmd_on_poff[127] = 0;
1900 on_poff_trigger.action = &vmcmd_action;
1901 return 1;
1902 }
1903 __setup("vmpoff=", vmcmd_on_poff_setup);
1904
1905 static int on_panic_notify(struct notifier_block *self,
1906 unsigned long event, void *data)
1907 {
1908 do_panic();
1909 return NOTIFY_OK;
1910 }
1911
1912 static struct notifier_block on_panic_nb = {
1913 .notifier_call = on_panic_notify,
1914 .priority = INT_MIN,
1915 };
1916
1917 void __init setup_ipl(void)
1918 {
1919 ipl_info.type = get_ipl_type();
1920 switch (ipl_info.type) {
1921 case IPL_TYPE_CCW:
1922 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1923 ipl_info.data.ccw.dev_id.ssid = 0;
1924 break;
1925 case IPL_TYPE_FCP:
1926 case IPL_TYPE_FCP_DUMP:
1927 ipl_info.data.fcp.dev_id.devno =
1928 IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1929 ipl_info.data.fcp.dev_id.ssid = 0;
1930 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1931 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1932 break;
1933 case IPL_TYPE_NSS:
1934 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1935 sizeof(ipl_info.data.nss.name));
1936 break;
1937 case IPL_TYPE_UNKNOWN:
1938 /* We have no info to copy */
1939 break;
1940 }
1941 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1942 }
1943
1944 void __init ipl_update_parameters(void)
1945 {
1946 int rc;
1947
1948 rc = diag308(DIAG308_STORE, &ipl_block);
1949 if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
1950 diag308_set_works = 1;
1951 }
1952
1953 void __init ipl_save_parameters(void)
1954 {
1955 struct cio_iplinfo iplinfo;
1956 void *src, *dst;
1957
1958 if (cio_get_iplinfo(&iplinfo))
1959 return;
1960
1961 ipl_devno = iplinfo.devno;
1962 ipl_flags |= IPL_DEVNO_VALID;
1963 if (!iplinfo.is_qdio)
1964 return;
1965 ipl_flags |= IPL_PARMBLOCK_VALID;
1966 src = (void *)(unsigned long)S390_lowcore.ipl_parmblock_ptr;
1967 dst = (void *)IPL_PARMBLOCK_ORIGIN;
1968 memmove(dst, src, PAGE_SIZE);
1969 S390_lowcore.ipl_parmblock_ptr = IPL_PARMBLOCK_ORIGIN;
1970 }
1971
1972 static LIST_HEAD(rcall);
1973 static DEFINE_MUTEX(rcall_mutex);
1974
1975 void register_reset_call(struct reset_call *reset)
1976 {
1977 mutex_lock(&rcall_mutex);
1978 list_add(&reset->list, &rcall);
1979 mutex_unlock(&rcall_mutex);
1980 }
1981 EXPORT_SYMBOL_GPL(register_reset_call);
1982
1983 void unregister_reset_call(struct reset_call *reset)
1984 {
1985 mutex_lock(&rcall_mutex);
1986 list_del(&reset->list);
1987 mutex_unlock(&rcall_mutex);
1988 }
1989 EXPORT_SYMBOL_GPL(unregister_reset_call);
1990
1991 static void do_reset_calls(void)
1992 {
1993 struct reset_call *reset;
1994
1995 #ifdef CONFIG_64BIT
1996 if (diag308_set_works) {
1997 diag308_reset();
1998 return;
1999 }
2000 #endif
2001 list_for_each_entry(reset, &rcall, list)
2002 reset->fn();
2003 }
2004
2005 u32 dump_prefix_page;
2006
2007 void s390_reset_system(void (*func)(void *), void *data)
2008 {
2009 struct _lowcore *lc;
2010
2011 lc = (struct _lowcore *)(unsigned long) store_prefix();
2012
2013 /* Stack for interrupt/machine check handler */
2014 lc->panic_stack = S390_lowcore.panic_stack;
2015
2016 /* Save prefix page address for dump case */
2017 dump_prefix_page = (u32)(unsigned long) lc;
2018
2019 /* Disable prefixing */
2020 set_prefix(0);
2021
2022 /* Disable lowcore protection */
2023 __ctl_clear_bit(0,28);
2024
2025 /* Set new machine check handler */
2026 S390_lowcore.mcck_new_psw.mask = psw_kernel_bits | PSW_MASK_DAT;
2027 S390_lowcore.mcck_new_psw.addr =
2028 PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;
2029
2030 /* Set new program check handler */
2031 S390_lowcore.program_new_psw.mask = psw_kernel_bits | PSW_MASK_DAT;
2032 S390_lowcore.program_new_psw.addr =
2033 PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
2034
2035 /* Store status at absolute zero */
2036 store_status();
2037
2038 do_reset_calls();
2039 if (func)
2040 func(data);
2041 }
Linux kernel - Deliverables
This page took 0.111656 seconds and 5 git commands to generate.