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s390/kdump: Clear subchannel ID to signal non-CCW/SCSI IPL
[deliverable/linux.git] / arch / s390 / kernel / ipl.c
1 /*
2 * ipl/reipl/dump support for Linux on s390.
3 *
4 * Copyright IBM Corp. 2005, 2012
5 * Author(s): Michael Holzheu <holzheu@de.ibm.com>
6 * Heiko Carstens <heiko.carstens@de.ibm.com>
7 * Volker Sameske <sameske@de.ibm.com>
8 */
9
10 #include <linux/types.h>
11 #include <linux/module.h>
12 #include <linux/device.h>
13 #include <linux/delay.h>
14 #include <linux/reboot.h>
15 #include <linux/ctype.h>
16 #include <linux/fs.h>
17 #include <linux/gfp.h>
18 #include <linux/crash_dump.h>
19 #include <linux/debug_locks.h>
20 #include <asm/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/checksum.h>
29 #include <asm/debug.h>
30 #include <asm/os_info.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", "%llx\n",
758 reipl_block_fcp->ipl_info.fcp.wwpn);
759 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\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 static void set_reipl_block_actual(struct ipl_parameter_block *reipl_block)
955 {
956 reipl_block_actual = reipl_block;
957 os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual,
958 reipl_block->hdr.len);
959 }
960
961 /* reipl type */
962
963 static int reipl_set_type(enum ipl_type type)
964 {
965 if (!(reipl_capabilities & type))
966 return -EINVAL;
967
968 switch(type) {
969 case IPL_TYPE_CCW:
970 if (diag308_set_works)
971 reipl_method = REIPL_METHOD_CCW_DIAG;
972 else if (MACHINE_IS_VM)
973 reipl_method = REIPL_METHOD_CCW_VM;
974 else
975 reipl_method = REIPL_METHOD_CCW_CIO;
976 set_reipl_block_actual(reipl_block_ccw);
977 break;
978 case IPL_TYPE_FCP:
979 if (diag308_set_works)
980 reipl_method = REIPL_METHOD_FCP_RW_DIAG;
981 else if (MACHINE_IS_VM)
982 reipl_method = REIPL_METHOD_FCP_RO_VM;
983 else
984 reipl_method = REIPL_METHOD_FCP_RO_DIAG;
985 set_reipl_block_actual(reipl_block_fcp);
986 break;
987 case IPL_TYPE_FCP_DUMP:
988 reipl_method = REIPL_METHOD_FCP_DUMP;
989 break;
990 case IPL_TYPE_NSS:
991 if (diag308_set_works)
992 reipl_method = REIPL_METHOD_NSS_DIAG;
993 else
994 reipl_method = REIPL_METHOD_NSS;
995 set_reipl_block_actual(reipl_block_nss);
996 break;
997 case IPL_TYPE_UNKNOWN:
998 reipl_method = REIPL_METHOD_DEFAULT;
999 break;
1000 default:
1001 BUG();
1002 }
1003 reipl_type = type;
1004 return 0;
1005 }
1006
1007 static ssize_t reipl_type_show(struct kobject *kobj,
1008 struct kobj_attribute *attr, char *page)
1009 {
1010 return sprintf(page, "%s\n", ipl_type_str(reipl_type));
1011 }
1012
1013 static ssize_t reipl_type_store(struct kobject *kobj,
1014 struct kobj_attribute *attr,
1015 const char *buf, size_t len)
1016 {
1017 int rc = -EINVAL;
1018
1019 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1020 rc = reipl_set_type(IPL_TYPE_CCW);
1021 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1022 rc = reipl_set_type(IPL_TYPE_FCP);
1023 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1024 rc = reipl_set_type(IPL_TYPE_NSS);
1025 return (rc != 0) ? rc : len;
1026 }
1027
1028 static struct kobj_attribute reipl_type_attr =
1029 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
1030
1031 static struct kset *reipl_kset;
1032 static struct kset *reipl_fcp_kset;
1033
1034 static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
1035 const enum ipl_method m)
1036 {
1037 char loadparm[LOADPARM_LEN + 1] = {};
1038 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
1039 char nss_name[NSS_NAME_SIZE + 1] = {};
1040 size_t pos = 0;
1041
1042 reipl_get_ascii_loadparm(loadparm, ipb);
1043 reipl_get_ascii_nss_name(nss_name, ipb);
1044 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
1045
1046 switch (m) {
1047 case REIPL_METHOD_CCW_VM:
1048 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
1049 break;
1050 case REIPL_METHOD_NSS:
1051 pos = sprintf(dst, "IPL %s", nss_name);
1052 break;
1053 default:
1054 break;
1055 }
1056 if (strlen(loadparm) > 0)
1057 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
1058 if (strlen(vmparm) > 0)
1059 sprintf(dst + pos, " PARM %s", vmparm);
1060 }
1061
1062 static void __reipl_run(void *unused)
1063 {
1064 struct ccw_dev_id devid;
1065 static char buf[128];
1066
1067 switch (reipl_method) {
1068 case REIPL_METHOD_CCW_CIO:
1069 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
1070 devid.ssid = 0;
1071 reipl_ccw_dev(&devid);
1072 break;
1073 case REIPL_METHOD_CCW_VM:
1074 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
1075 __cpcmd(buf, NULL, 0, NULL);
1076 break;
1077 case REIPL_METHOD_CCW_DIAG:
1078 diag308(DIAG308_SET, reipl_block_ccw);
1079 diag308(DIAG308_IPL, NULL);
1080 break;
1081 case REIPL_METHOD_FCP_RW_DIAG:
1082 diag308(DIAG308_SET, reipl_block_fcp);
1083 diag308(DIAG308_IPL, NULL);
1084 break;
1085 case REIPL_METHOD_FCP_RO_DIAG:
1086 diag308(DIAG308_IPL, NULL);
1087 break;
1088 case REIPL_METHOD_FCP_RO_VM:
1089 __cpcmd("IPL", NULL, 0, NULL);
1090 break;
1091 case REIPL_METHOD_NSS_DIAG:
1092 diag308(DIAG308_SET, reipl_block_nss);
1093 diag308(DIAG308_IPL, NULL);
1094 break;
1095 case REIPL_METHOD_NSS:
1096 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
1097 __cpcmd(buf, NULL, 0, NULL);
1098 break;
1099 case REIPL_METHOD_DEFAULT:
1100 if (MACHINE_IS_VM)
1101 __cpcmd("IPL", NULL, 0, NULL);
1102 diag308(DIAG308_IPL, NULL);
1103 break;
1104 case REIPL_METHOD_FCP_DUMP:
1105 break;
1106 }
1107 disabled_wait((unsigned long) __builtin_return_address(0));
1108 }
1109
1110 static void reipl_run(struct shutdown_trigger *trigger)
1111 {
1112 smp_call_ipl_cpu(__reipl_run, NULL);
1113 }
1114
1115 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
1116 {
1117 ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
1118 ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1119 ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1120 ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1121 }
1122
1123 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1124 {
1125 /* LOADPARM */
1126 /* check if read scp info worked and set loadparm */
1127 if (sclp_ipl_info.is_valid)
1128 memcpy(ipb->ipl_info.ccw.load_parm,
1129 &sclp_ipl_info.loadparm, LOADPARM_LEN);
1130 else
1131 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1132 memset(ipb->ipl_info.ccw.load_parm, 0x40, LOADPARM_LEN);
1133 ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
1134
1135 /* VM PARM */
1136 if (MACHINE_IS_VM && diag308_set_works &&
1137 (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1138
1139 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1140 ipb->ipl_info.ccw.vm_parm_len =
1141 ipl_block.ipl_info.ccw.vm_parm_len;
1142 memcpy(ipb->ipl_info.ccw.vm_parm,
1143 ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1144 }
1145 }
1146
1147 static int __init reipl_nss_init(void)
1148 {
1149 int rc;
1150
1151 if (!MACHINE_IS_VM)
1152 return 0;
1153
1154 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1155 if (!reipl_block_nss)
1156 return -ENOMEM;
1157
1158 if (!diag308_set_works)
1159 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO;
1160
1161 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1162 if (rc)
1163 return rc;
1164
1165 reipl_block_ccw_init(reipl_block_nss);
1166 if (ipl_info.type == IPL_TYPE_NSS) {
1167 memset(reipl_block_nss->ipl_info.ccw.nss_name,
1168 ' ', NSS_NAME_SIZE);
1169 memcpy(reipl_block_nss->ipl_info.ccw.nss_name,
1170 kernel_nss_name, strlen(kernel_nss_name));
1171 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
1172 reipl_block_nss->ipl_info.ccw.vm_flags |=
1173 DIAG308_VM_FLAGS_NSS_VALID;
1174
1175 reipl_block_ccw_fill_parms(reipl_block_nss);
1176 }
1177
1178 reipl_capabilities |= IPL_TYPE_NSS;
1179 return 0;
1180 }
1181
1182 static int __init reipl_ccw_init(void)
1183 {
1184 int rc;
1185
1186 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1187 if (!reipl_block_ccw)
1188 return -ENOMEM;
1189
1190 if (MACHINE_IS_VM) {
1191 if (!diag308_set_works)
1192 sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
1193 rc = sysfs_create_group(&reipl_kset->kobj,
1194 &reipl_ccw_attr_group_vm);
1195 } else {
1196 if(!diag308_set_works)
1197 sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
1198 rc = sysfs_create_group(&reipl_kset->kobj,
1199 &reipl_ccw_attr_group_lpar);
1200 }
1201 if (rc)
1202 return rc;
1203
1204 reipl_block_ccw_init(reipl_block_ccw);
1205 if (ipl_info.type == IPL_TYPE_CCW) {
1206 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
1207 reipl_block_ccw_fill_parms(reipl_block_ccw);
1208 }
1209
1210 reipl_capabilities |= IPL_TYPE_CCW;
1211 return 0;
1212 }
1213
1214 static int __init reipl_fcp_init(void)
1215 {
1216 int rc;
1217
1218 if (!diag308_set_works) {
1219 if (ipl_info.type == IPL_TYPE_FCP) {
1220 make_attrs_ro(reipl_fcp_attrs);
1221 sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO;
1222 } else
1223 return 0;
1224 }
1225
1226 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1227 if (!reipl_block_fcp)
1228 return -ENOMEM;
1229
1230 /* sysfs: create fcp kset for mixing attr group and bin attrs */
1231 reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1232 &reipl_kset->kobj);
1233 if (!reipl_fcp_kset) {
1234 free_page((unsigned long) reipl_block_fcp);
1235 return -ENOMEM;
1236 }
1237
1238 rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1239 if (rc) {
1240 kset_unregister(reipl_fcp_kset);
1241 free_page((unsigned long) reipl_block_fcp);
1242 return rc;
1243 }
1244
1245 rc = sysfs_create_bin_file(&reipl_fcp_kset->kobj,
1246 &sys_reipl_fcp_scp_data_attr);
1247 if (rc) {
1248 sysfs_remove_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1249 kset_unregister(reipl_fcp_kset);
1250 free_page((unsigned long) reipl_block_fcp);
1251 return rc;
1252 }
1253
1254 if (ipl_info.type == IPL_TYPE_FCP)
1255 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
1256 else {
1257 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1258 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1259 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1260 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1261 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1262 }
1263 reipl_capabilities |= IPL_TYPE_FCP;
1264 return 0;
1265 }
1266
1267 static int __init reipl_type_init(void)
1268 {
1269 enum ipl_type reipl_type = ipl_info.type;
1270 struct ipl_parameter_block *reipl_block;
1271 unsigned long size;
1272
1273 reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size);
1274 if (!reipl_block)
1275 goto out;
1276 /*
1277 * If we have an OS info reipl block, this will be used
1278 */
1279 if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_FCP) {
1280 memcpy(reipl_block_fcp, reipl_block, size);
1281 reipl_type = IPL_TYPE_FCP;
1282 } else if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_CCW) {
1283 memcpy(reipl_block_ccw, reipl_block, size);
1284 reipl_type = IPL_TYPE_CCW;
1285 }
1286 out:
1287 return reipl_set_type(reipl_type);
1288 }
1289
1290 static int __init reipl_init(void)
1291 {
1292 int rc;
1293
1294 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1295 if (!reipl_kset)
1296 return -ENOMEM;
1297 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1298 if (rc) {
1299 kset_unregister(reipl_kset);
1300 return rc;
1301 }
1302 rc = reipl_ccw_init();
1303 if (rc)
1304 return rc;
1305 rc = reipl_fcp_init();
1306 if (rc)
1307 return rc;
1308 rc = reipl_nss_init();
1309 if (rc)
1310 return rc;
1311 return reipl_type_init();
1312 }
1313
1314 static struct shutdown_action __refdata reipl_action = {
1315 .name = SHUTDOWN_ACTION_REIPL_STR,
1316 .fn = reipl_run,
1317 .init = reipl_init,
1318 };
1319
1320 /*
1321 * dump shutdown action: Dump Linux on shutdown.
1322 */
1323
1324 /* FCP dump device attributes */
1325
1326 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n",
1327 dump_block_fcp->ipl_info.fcp.wwpn);
1328 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n",
1329 dump_block_fcp->ipl_info.fcp.lun);
1330 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1331 dump_block_fcp->ipl_info.fcp.bootprog);
1332 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1333 dump_block_fcp->ipl_info.fcp.br_lba);
1334 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1335 dump_block_fcp->ipl_info.fcp.devno);
1336
1337 static struct attribute *dump_fcp_attrs[] = {
1338 &sys_dump_fcp_device_attr.attr,
1339 &sys_dump_fcp_wwpn_attr.attr,
1340 &sys_dump_fcp_lun_attr.attr,
1341 &sys_dump_fcp_bootprog_attr.attr,
1342 &sys_dump_fcp_br_lba_attr.attr,
1343 NULL,
1344 };
1345
1346 static struct attribute_group dump_fcp_attr_group = {
1347 .name = IPL_FCP_STR,
1348 .attrs = dump_fcp_attrs,
1349 };
1350
1351 /* CCW dump device attributes */
1352
1353 DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
1354 dump_block_ccw->ipl_info.ccw.devno);
1355
1356 static struct attribute *dump_ccw_attrs[] = {
1357 &sys_dump_ccw_device_attr.attr,
1358 NULL,
1359 };
1360
1361 static struct attribute_group dump_ccw_attr_group = {
1362 .name = IPL_CCW_STR,
1363 .attrs = dump_ccw_attrs,
1364 };
1365
1366 /* dump type */
1367
1368 static int dump_set_type(enum dump_type type)
1369 {
1370 if (!(dump_capabilities & type))
1371 return -EINVAL;
1372 switch (type) {
1373 case DUMP_TYPE_CCW:
1374 if (diag308_set_works)
1375 dump_method = DUMP_METHOD_CCW_DIAG;
1376 else if (MACHINE_IS_VM)
1377 dump_method = DUMP_METHOD_CCW_VM;
1378 else
1379 dump_method = DUMP_METHOD_CCW_CIO;
1380 break;
1381 case DUMP_TYPE_FCP:
1382 dump_method = DUMP_METHOD_FCP_DIAG;
1383 break;
1384 default:
1385 dump_method = DUMP_METHOD_NONE;
1386 }
1387 dump_type = type;
1388 return 0;
1389 }
1390
1391 static ssize_t dump_type_show(struct kobject *kobj,
1392 struct kobj_attribute *attr, char *page)
1393 {
1394 return sprintf(page, "%s\n", dump_type_str(dump_type));
1395 }
1396
1397 static ssize_t dump_type_store(struct kobject *kobj,
1398 struct kobj_attribute *attr,
1399 const char *buf, size_t len)
1400 {
1401 int rc = -EINVAL;
1402
1403 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1404 rc = dump_set_type(DUMP_TYPE_NONE);
1405 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1406 rc = dump_set_type(DUMP_TYPE_CCW);
1407 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1408 rc = dump_set_type(DUMP_TYPE_FCP);
1409 return (rc != 0) ? rc : len;
1410 }
1411
1412 static struct kobj_attribute dump_type_attr =
1413 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1414
1415 static struct kset *dump_kset;
1416
1417 static void diag308_dump(void *dump_block)
1418 {
1419 diag308(DIAG308_SET, dump_block);
1420 while (1) {
1421 if (diag308(DIAG308_DUMP, NULL) != 0x302)
1422 break;
1423 udelay_simple(USEC_PER_SEC);
1424 }
1425 }
1426
1427 static void __dump_run(void *unused)
1428 {
1429 struct ccw_dev_id devid;
1430 static char buf[100];
1431
1432 switch (dump_method) {
1433 case DUMP_METHOD_CCW_CIO:
1434 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
1435 devid.ssid = 0;
1436 reipl_ccw_dev(&devid);
1437 break;
1438 case DUMP_METHOD_CCW_VM:
1439 sprintf(buf, "STORE STATUS");
1440 __cpcmd(buf, NULL, 0, NULL);
1441 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
1442 __cpcmd(buf, NULL, 0, NULL);
1443 break;
1444 case DUMP_METHOD_CCW_DIAG:
1445 diag308_dump(dump_block_ccw);
1446 break;
1447 case DUMP_METHOD_FCP_DIAG:
1448 diag308_dump(dump_block_fcp);
1449 break;
1450 default:
1451 break;
1452 }
1453 }
1454
1455 static void dump_run(struct shutdown_trigger *trigger)
1456 {
1457 if (dump_method == DUMP_METHOD_NONE)
1458 return;
1459 smp_send_stop();
1460 smp_call_ipl_cpu(__dump_run, NULL);
1461 }
1462
1463 static int __init dump_ccw_init(void)
1464 {
1465 int rc;
1466
1467 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1468 if (!dump_block_ccw)
1469 return -ENOMEM;
1470 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1471 if (rc) {
1472 free_page((unsigned long)dump_block_ccw);
1473 return rc;
1474 }
1475 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1476 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1477 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1478 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1479 dump_capabilities |= DUMP_TYPE_CCW;
1480 return 0;
1481 }
1482
1483 static int __init dump_fcp_init(void)
1484 {
1485 int rc;
1486
1487 if (!sclp_ipl_info.has_dump)
1488 return 0; /* LDIPL DUMP is not installed */
1489 if (!diag308_set_works)
1490 return 0;
1491 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1492 if (!dump_block_fcp)
1493 return -ENOMEM;
1494 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1495 if (rc) {
1496 free_page((unsigned long)dump_block_fcp);
1497 return rc;
1498 }
1499 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1500 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1501 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1502 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1503 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1504 dump_capabilities |= DUMP_TYPE_FCP;
1505 return 0;
1506 }
1507
1508 static int __init dump_init(void)
1509 {
1510 int rc;
1511
1512 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1513 if (!dump_kset)
1514 return -ENOMEM;
1515 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1516 if (rc) {
1517 kset_unregister(dump_kset);
1518 return rc;
1519 }
1520 rc = dump_ccw_init();
1521 if (rc)
1522 return rc;
1523 rc = dump_fcp_init();
1524 if (rc)
1525 return rc;
1526 dump_set_type(DUMP_TYPE_NONE);
1527 return 0;
1528 }
1529
1530 static struct shutdown_action __refdata dump_action = {
1531 .name = SHUTDOWN_ACTION_DUMP_STR,
1532 .fn = dump_run,
1533 .init = dump_init,
1534 };
1535
1536 static void dump_reipl_run(struct shutdown_trigger *trigger)
1537 {
1538 unsigned long ipib = (unsigned long) reipl_block_actual;
1539 unsigned int csum;
1540
1541 csum = csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
1542 mem_assign_absolute(S390_lowcore.ipib, ipib);
1543 mem_assign_absolute(S390_lowcore.ipib_checksum, csum);
1544 dump_run(trigger);
1545 }
1546
1547 static int __init dump_reipl_init(void)
1548 {
1549 if (!diag308_set_works)
1550 return -EOPNOTSUPP;
1551 else
1552 return 0;
1553 }
1554
1555 static struct shutdown_action __refdata dump_reipl_action = {
1556 .name = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1557 .fn = dump_reipl_run,
1558 .init = dump_reipl_init,
1559 };
1560
1561 /*
1562 * vmcmd shutdown action: Trigger vm command on shutdown.
1563 */
1564
1565 static char vmcmd_on_reboot[128];
1566 static char vmcmd_on_panic[128];
1567 static char vmcmd_on_halt[128];
1568 static char vmcmd_on_poff[128];
1569 static char vmcmd_on_restart[128];
1570
1571 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1572 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1573 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1574 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1575 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1576
1577 static struct attribute *vmcmd_attrs[] = {
1578 &sys_vmcmd_on_reboot_attr.attr,
1579 &sys_vmcmd_on_panic_attr.attr,
1580 &sys_vmcmd_on_halt_attr.attr,
1581 &sys_vmcmd_on_poff_attr.attr,
1582 &sys_vmcmd_on_restart_attr.attr,
1583 NULL,
1584 };
1585
1586 static struct attribute_group vmcmd_attr_group = {
1587 .attrs = vmcmd_attrs,
1588 };
1589
1590 static struct kset *vmcmd_kset;
1591
1592 static void vmcmd_run(struct shutdown_trigger *trigger)
1593 {
1594 char *cmd;
1595
1596 if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1597 cmd = vmcmd_on_reboot;
1598 else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1599 cmd = vmcmd_on_panic;
1600 else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1601 cmd = vmcmd_on_halt;
1602 else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1603 cmd = vmcmd_on_poff;
1604 else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
1605 cmd = vmcmd_on_restart;
1606 else
1607 return;
1608
1609 if (strlen(cmd) == 0)
1610 return;
1611 __cpcmd(cmd, NULL, 0, NULL);
1612 }
1613
1614 static int vmcmd_init(void)
1615 {
1616 if (!MACHINE_IS_VM)
1617 return -EOPNOTSUPP;
1618 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1619 if (!vmcmd_kset)
1620 return -ENOMEM;
1621 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1622 }
1623
1624 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1625 vmcmd_run, vmcmd_init};
1626
1627 /*
1628 * stop shutdown action: Stop Linux on shutdown.
1629 */
1630
1631 static void stop_run(struct shutdown_trigger *trigger)
1632 {
1633 if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
1634 strcmp(trigger->name, ON_RESTART_STR) == 0)
1635 disabled_wait((unsigned long) __builtin_return_address(0));
1636 smp_stop_cpu();
1637 }
1638
1639 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1640 stop_run, NULL};
1641
1642 /* action list */
1643
1644 static struct shutdown_action *shutdown_actions_list[] = {
1645 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1646 &vmcmd_action, &stop_action};
1647 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1648
1649 /*
1650 * Trigger section
1651 */
1652
1653 static struct kset *shutdown_actions_kset;
1654
1655 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1656 size_t len)
1657 {
1658 int i;
1659
1660 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1661 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1662 if (shutdown_actions_list[i]->init_rc) {
1663 return shutdown_actions_list[i]->init_rc;
1664 } else {
1665 trigger->action = shutdown_actions_list[i];
1666 return len;
1667 }
1668 }
1669 }
1670 return -EINVAL;
1671 }
1672
1673 /* on reipl */
1674
1675 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1676 &reipl_action};
1677
1678 static ssize_t on_reboot_show(struct kobject *kobj,
1679 struct kobj_attribute *attr, char *page)
1680 {
1681 return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1682 }
1683
1684 static ssize_t on_reboot_store(struct kobject *kobj,
1685 struct kobj_attribute *attr,
1686 const char *buf, size_t len)
1687 {
1688 return set_trigger(buf, &on_reboot_trigger, len);
1689 }
1690
1691 static struct kobj_attribute on_reboot_attr =
1692 __ATTR(on_reboot, 0644, on_reboot_show, on_reboot_store);
1693
1694 static void do_machine_restart(char *__unused)
1695 {
1696 smp_send_stop();
1697 on_reboot_trigger.action->fn(&on_reboot_trigger);
1698 reipl_run(NULL);
1699 }
1700 void (*_machine_restart)(char *command) = do_machine_restart;
1701
1702 /* on panic */
1703
1704 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1705
1706 static ssize_t on_panic_show(struct kobject *kobj,
1707 struct kobj_attribute *attr, char *page)
1708 {
1709 return sprintf(page, "%s\n", on_panic_trigger.action->name);
1710 }
1711
1712 static ssize_t on_panic_store(struct kobject *kobj,
1713 struct kobj_attribute *attr,
1714 const char *buf, size_t len)
1715 {
1716 return set_trigger(buf, &on_panic_trigger, len);
1717 }
1718
1719 static struct kobj_attribute on_panic_attr =
1720 __ATTR(on_panic, 0644, on_panic_show, on_panic_store);
1721
1722 static void do_panic(void)
1723 {
1724 lgr_info_log();
1725 on_panic_trigger.action->fn(&on_panic_trigger);
1726 stop_run(&on_panic_trigger);
1727 }
1728
1729 /* on restart */
1730
1731 static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
1732 &stop_action};
1733
1734 static ssize_t on_restart_show(struct kobject *kobj,
1735 struct kobj_attribute *attr, char *page)
1736 {
1737 return sprintf(page, "%s\n", on_restart_trigger.action->name);
1738 }
1739
1740 static ssize_t on_restart_store(struct kobject *kobj,
1741 struct kobj_attribute *attr,
1742 const char *buf, size_t len)
1743 {
1744 return set_trigger(buf, &on_restart_trigger, len);
1745 }
1746
1747 static struct kobj_attribute on_restart_attr =
1748 __ATTR(on_restart, 0644, on_restart_show, on_restart_store);
1749
1750 static void __do_restart(void *ignore)
1751 {
1752 __arch_local_irq_stosm(0x04); /* enable DAT */
1753 smp_send_stop();
1754 #ifdef CONFIG_CRASH_DUMP
1755 crash_kexec(NULL);
1756 #endif
1757 on_restart_trigger.action->fn(&on_restart_trigger);
1758 stop_run(&on_restart_trigger);
1759 }
1760
1761 void do_restart(void)
1762 {
1763 tracing_off();
1764 debug_locks_off();
1765 lgr_info_log();
1766 smp_call_online_cpu(__do_restart, NULL);
1767 }
1768
1769 /* on halt */
1770
1771 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1772
1773 static ssize_t on_halt_show(struct kobject *kobj,
1774 struct kobj_attribute *attr, char *page)
1775 {
1776 return sprintf(page, "%s\n", on_halt_trigger.action->name);
1777 }
1778
1779 static ssize_t on_halt_store(struct kobject *kobj,
1780 struct kobj_attribute *attr,
1781 const char *buf, size_t len)
1782 {
1783 return set_trigger(buf, &on_halt_trigger, len);
1784 }
1785
1786 static struct kobj_attribute on_halt_attr =
1787 __ATTR(on_halt, 0644, on_halt_show, on_halt_store);
1788
1789
1790 static void do_machine_halt(void)
1791 {
1792 smp_send_stop();
1793 on_halt_trigger.action->fn(&on_halt_trigger);
1794 stop_run(&on_halt_trigger);
1795 }
1796 void (*_machine_halt)(void) = do_machine_halt;
1797
1798 /* on power off */
1799
1800 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1801
1802 static ssize_t on_poff_show(struct kobject *kobj,
1803 struct kobj_attribute *attr, char *page)
1804 {
1805 return sprintf(page, "%s\n", on_poff_trigger.action->name);
1806 }
1807
1808 static ssize_t on_poff_store(struct kobject *kobj,
1809 struct kobj_attribute *attr,
1810 const char *buf, size_t len)
1811 {
1812 return set_trigger(buf, &on_poff_trigger, len);
1813 }
1814
1815 static struct kobj_attribute on_poff_attr =
1816 __ATTR(on_poff, 0644, on_poff_show, on_poff_store);
1817
1818
1819 static void do_machine_power_off(void)
1820 {
1821 smp_send_stop();
1822 on_poff_trigger.action->fn(&on_poff_trigger);
1823 stop_run(&on_poff_trigger);
1824 }
1825 void (*_machine_power_off)(void) = do_machine_power_off;
1826
1827 static void __init shutdown_triggers_init(void)
1828 {
1829 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1830 firmware_kobj);
1831 if (!shutdown_actions_kset)
1832 goto fail;
1833 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1834 &on_reboot_attr.attr))
1835 goto fail;
1836 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1837 &on_panic_attr.attr))
1838 goto fail;
1839 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1840 &on_halt_attr.attr))
1841 goto fail;
1842 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1843 &on_poff_attr.attr))
1844 goto fail;
1845 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1846 &on_restart_attr.attr))
1847 goto fail;
1848 return;
1849 fail:
1850 panic("shutdown_triggers_init failed\n");
1851 }
1852
1853 static void __init shutdown_actions_init(void)
1854 {
1855 int i;
1856
1857 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1858 if (!shutdown_actions_list[i]->init)
1859 continue;
1860 shutdown_actions_list[i]->init_rc =
1861 shutdown_actions_list[i]->init();
1862 }
1863 }
1864
1865 static int __init s390_ipl_init(void)
1866 {
1867 sclp_get_ipl_info(&sclp_ipl_info);
1868 shutdown_actions_init();
1869 shutdown_triggers_init();
1870 return 0;
1871 }
1872
1873 __initcall(s390_ipl_init);
1874
1875 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1876 {
1877 int sx, dx;
1878
1879 dx = 0;
1880 for (sx = 0; src[sx] != 0; sx++) {
1881 if (src[sx] == '"')
1882 continue;
1883 dst[dx++] = src[sx];
1884 if (dx >= n)
1885 break;
1886 }
1887 }
1888
1889 static int __init vmcmd_on_reboot_setup(char *str)
1890 {
1891 if (!MACHINE_IS_VM)
1892 return 1;
1893 strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1894 vmcmd_on_reboot[127] = 0;
1895 on_reboot_trigger.action = &vmcmd_action;
1896 return 1;
1897 }
1898 __setup("vmreboot=", vmcmd_on_reboot_setup);
1899
1900 static int __init vmcmd_on_panic_setup(char *str)
1901 {
1902 if (!MACHINE_IS_VM)
1903 return 1;
1904 strncpy_skip_quote(vmcmd_on_panic, str, 127);
1905 vmcmd_on_panic[127] = 0;
1906 on_panic_trigger.action = &vmcmd_action;
1907 return 1;
1908 }
1909 __setup("vmpanic=", vmcmd_on_panic_setup);
1910
1911 static int __init vmcmd_on_halt_setup(char *str)
1912 {
1913 if (!MACHINE_IS_VM)
1914 return 1;
1915 strncpy_skip_quote(vmcmd_on_halt, str, 127);
1916 vmcmd_on_halt[127] = 0;
1917 on_halt_trigger.action = &vmcmd_action;
1918 return 1;
1919 }
1920 __setup("vmhalt=", vmcmd_on_halt_setup);
1921
1922 static int __init vmcmd_on_poff_setup(char *str)
1923 {
1924 if (!MACHINE_IS_VM)
1925 return 1;
1926 strncpy_skip_quote(vmcmd_on_poff, str, 127);
1927 vmcmd_on_poff[127] = 0;
1928 on_poff_trigger.action = &vmcmd_action;
1929 return 1;
1930 }
1931 __setup("vmpoff=", vmcmd_on_poff_setup);
1932
1933 static int on_panic_notify(struct notifier_block *self,
1934 unsigned long event, void *data)
1935 {
1936 do_panic();
1937 return NOTIFY_OK;
1938 }
1939
1940 static struct notifier_block on_panic_nb = {
1941 .notifier_call = on_panic_notify,
1942 .priority = INT_MIN,
1943 };
1944
1945 void __init setup_ipl(void)
1946 {
1947 ipl_info.type = get_ipl_type();
1948 switch (ipl_info.type) {
1949 case IPL_TYPE_CCW:
1950 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1951 ipl_info.data.ccw.dev_id.ssid = 0;
1952 break;
1953 case IPL_TYPE_FCP:
1954 case IPL_TYPE_FCP_DUMP:
1955 ipl_info.data.fcp.dev_id.devno =
1956 IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1957 ipl_info.data.fcp.dev_id.ssid = 0;
1958 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1959 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1960 break;
1961 case IPL_TYPE_NSS:
1962 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1963 sizeof(ipl_info.data.nss.name));
1964 break;
1965 case IPL_TYPE_UNKNOWN:
1966 /* We have no info to copy */
1967 break;
1968 }
1969 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1970 }
1971
1972 void __init ipl_update_parameters(void)
1973 {
1974 int rc;
1975
1976 rc = diag308(DIAG308_STORE, &ipl_block);
1977 if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
1978 diag308_set_works = 1;
1979 }
1980
1981 void __init ipl_save_parameters(void)
1982 {
1983 struct cio_iplinfo iplinfo;
1984 void *src, *dst;
1985
1986 if (cio_get_iplinfo(&iplinfo))
1987 return;
1988
1989 ipl_devno = iplinfo.devno;
1990 ipl_flags |= IPL_DEVNO_VALID;
1991 if (!iplinfo.is_qdio)
1992 return;
1993 ipl_flags |= IPL_PARMBLOCK_VALID;
1994 src = (void *)(unsigned long)S390_lowcore.ipl_parmblock_ptr;
1995 dst = (void *)IPL_PARMBLOCK_ORIGIN;
1996 memmove(dst, src, PAGE_SIZE);
1997 S390_lowcore.ipl_parmblock_ptr = IPL_PARMBLOCK_ORIGIN;
1998 }
1999
2000 static LIST_HEAD(rcall);
2001 static DEFINE_MUTEX(rcall_mutex);
2002
2003 void register_reset_call(struct reset_call *reset)
2004 {
2005 mutex_lock(&rcall_mutex);
2006 list_add(&reset->list, &rcall);
2007 mutex_unlock(&rcall_mutex);
2008 }
2009 EXPORT_SYMBOL_GPL(register_reset_call);
2010
2011 void unregister_reset_call(struct reset_call *reset)
2012 {
2013 mutex_lock(&rcall_mutex);
2014 list_del(&reset->list);
2015 mutex_unlock(&rcall_mutex);
2016 }
2017 EXPORT_SYMBOL_GPL(unregister_reset_call);
2018
2019 static void do_reset_calls(void)
2020 {
2021 struct reset_call *reset;
2022
2023 #ifdef CONFIG_64BIT
2024 if (diag308_set_works) {
2025 diag308_reset();
2026 return;
2027 }
2028 #endif
2029 list_for_each_entry(reset, &rcall, list)
2030 reset->fn();
2031 }
2032
2033 u32 dump_prefix_page;
2034
2035 void s390_reset_system(void (*func)(void *), void *data)
2036 {
2037 struct _lowcore *lc;
2038
2039 lc = (struct _lowcore *)(unsigned long) store_prefix();
2040
2041 /* Stack for interrupt/machine check handler */
2042 lc->panic_stack = S390_lowcore.panic_stack;
2043
2044 /* Save prefix page address for dump case */
2045 dump_prefix_page = (u32)(unsigned long) lc;
2046
2047 /* Disable prefixing */
2048 set_prefix(0);
2049
2050 /* Disable lowcore protection */
2051 __ctl_clear_bit(0,28);
2052
2053 /* Set new machine check handler */
2054 S390_lowcore.mcck_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
2055 S390_lowcore.mcck_new_psw.addr =
2056 PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;
2057
2058 /* Set new program check handler */
2059 S390_lowcore.program_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
2060 S390_lowcore.program_new_psw.addr =
2061 PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
2062
2063 /*
2064 * Clear subchannel ID and number to signal new kernel that no CCW or
2065 * SCSI IPL has been done (for kexec and kdump)
2066 */
2067 S390_lowcore.subchannel_id = 0;
2068 S390_lowcore.subchannel_nr = 0;
2069
2070 /* Store status at absolute zero */
2071 store_status();
2072
2073 do_reset_calls();
2074 if (func)
2075 func(data);
2076 }
Linux kernel - Deliverables
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