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Merge branch 'for-3.18-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj...
[linux/fpc-iii.git] / arch / s390 / kernel / ipl.c
blob39badb9ca0b30c6b7b32ce720165e85c3c33319a
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 ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
459 struct kobj_attribute *attr, char *page)
460 {
461 char loadparm[LOADPARM_LEN + 1] = {};
462
463 if (!sclp_ipl_info.is_valid)
464 return sprintf(page, "#unknown#\n");
465 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
466 EBCASC(loadparm, LOADPARM_LEN);
467 strim(loadparm);
468 return sprintf(page, "%s\n", loadparm);
469 }
470
471 static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
472 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
473
474 static struct attribute *ipl_fcp_attrs[] = {
475 &sys_ipl_type_attr.attr,
476 &sys_ipl_device_attr.attr,
477 &sys_ipl_fcp_wwpn_attr.attr,
478 &sys_ipl_fcp_lun_attr.attr,
479 &sys_ipl_fcp_bootprog_attr.attr,
480 &sys_ipl_fcp_br_lba_attr.attr,
481 &sys_ipl_ccw_loadparm_attr.attr,
482 NULL,
483 };
484
485 static struct attribute_group ipl_fcp_attr_group = {
486 .attrs = ipl_fcp_attrs,
487 };
488
489 /* CCW ipl device attributes */
490
491 static struct attribute *ipl_ccw_attrs_vm[] = {
492 &sys_ipl_type_attr.attr,
493 &sys_ipl_device_attr.attr,
494 &sys_ipl_ccw_loadparm_attr.attr,
495 &sys_ipl_vm_parm_attr.attr,
496 NULL,
497 };
498
499 static struct attribute *ipl_ccw_attrs_lpar[] = {
500 &sys_ipl_type_attr.attr,
501 &sys_ipl_device_attr.attr,
502 &sys_ipl_ccw_loadparm_attr.attr,
503 NULL,
504 };
505
506 static struct attribute_group ipl_ccw_attr_group_vm = {
507 .attrs = ipl_ccw_attrs_vm,
508 };
509
510 static struct attribute_group ipl_ccw_attr_group_lpar = {
511 .attrs = ipl_ccw_attrs_lpar
512 };
513
514 /* NSS ipl device attributes */
515
516 DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
517
518 static struct attribute *ipl_nss_attrs[] = {
519 &sys_ipl_type_attr.attr,
520 &sys_ipl_nss_name_attr.attr,
521 &sys_ipl_ccw_loadparm_attr.attr,
522 &sys_ipl_vm_parm_attr.attr,
523 NULL,
524 };
525
526 static struct attribute_group ipl_nss_attr_group = {
527 .attrs = ipl_nss_attrs,
528 };
529
530 /* UNKNOWN ipl device attributes */
531
532 static struct attribute *ipl_unknown_attrs[] = {
533 &sys_ipl_type_attr.attr,
534 NULL,
535 };
536
537 static struct attribute_group ipl_unknown_attr_group = {
538 .attrs = ipl_unknown_attrs,
539 };
540
541 static struct kset *ipl_kset;
542
543 static int __init ipl_register_fcp_files(void)
544 {
545 int rc;
546
547 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
548 if (rc)
549 goto out;
550 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
551 if (rc)
552 goto out_ipl_parm;
553 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_scp_data_attr);
554 if (!rc)
555 goto out;
556
557 sysfs_remove_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
558
559 out_ipl_parm:
560 sysfs_remove_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
561 out:
562 return rc;
563 }
564
565 static void __ipl_run(void *unused)
566 {
567 diag308(DIAG308_IPL, NULL);
568 if (MACHINE_IS_VM)
569 __cpcmd("IPL", NULL, 0, NULL);
570 else if (ipl_info.type == IPL_TYPE_CCW)
571 reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
572 }
573
574 static void ipl_run(struct shutdown_trigger *trigger)
575 {
576 smp_call_ipl_cpu(__ipl_run, NULL);
577 }
578
579 static int __init ipl_init(void)
580 {
581 int rc;
582
583 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
584 if (!ipl_kset) {
585 rc = -ENOMEM;
586 goto out;
587 }
588 switch (ipl_info.type) {
589 case IPL_TYPE_CCW:
590 if (MACHINE_IS_VM)
591 rc = sysfs_create_group(&ipl_kset->kobj,
592 &ipl_ccw_attr_group_vm);
593 else
594 rc = sysfs_create_group(&ipl_kset->kobj,
595 &ipl_ccw_attr_group_lpar);
596 break;
597 case IPL_TYPE_FCP:
598 case IPL_TYPE_FCP_DUMP:
599 rc = ipl_register_fcp_files();
600 break;
601 case IPL_TYPE_NSS:
602 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group);
603 break;
604 default:
605 rc = sysfs_create_group(&ipl_kset->kobj,
606 &ipl_unknown_attr_group);
607 break;
608 }
609 out:
610 if (rc)
611 panic("ipl_init failed: rc = %i\n", rc);
612
613 return 0;
614 }
615
616 static struct shutdown_action __refdata ipl_action = {
617 .name = SHUTDOWN_ACTION_IPL_STR,
618 .fn = ipl_run,
619 .init = ipl_init,
620 };
621
622 /*
623 * reipl shutdown action: Reboot Linux on shutdown.
624 */
625
626 /* VM IPL PARM attributes */
627 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
628 char *page)
629 {
630 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
631
632 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
633 return sprintf(page, "%s\n", vmparm);
634 }
635
636 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
637 size_t vmparm_max,
638 const char *buf, size_t len)
639 {
640 int i, ip_len;
641
642 /* ignore trailing newline */
643 ip_len = len;
644 if ((len > 0) && (buf[len - 1] == '\n'))
645 ip_len--;
646
647 if (ip_len > vmparm_max)
648 return -EINVAL;
649
650 /* parm is used to store kernel options, check for common chars */
651 for (i = 0; i < ip_len; i++)
652 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
653 return -EINVAL;
654
655 memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
656 ipb->ipl_info.ccw.vm_parm_len = ip_len;
657 if (ip_len > 0) {
658 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
659 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
660 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
661 } else {
662 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
663 }
664
665 return len;
666 }
667
668 /* NSS wrapper */
669 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
670 struct kobj_attribute *attr, char *page)
671 {
672 return reipl_generic_vmparm_show(reipl_block_nss, page);
673 }
674
675 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
676 struct kobj_attribute *attr,
677 const char *buf, size_t len)
678 {
679 return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
680 }
681
682 /* CCW wrapper */
683 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
684 struct kobj_attribute *attr, char *page)
685 {
686 return reipl_generic_vmparm_show(reipl_block_ccw, page);
687 }
688
689 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
690 struct kobj_attribute *attr,
691 const char *buf, size_t len)
692 {
693 return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
694 }
695
696 static struct kobj_attribute sys_reipl_nss_vmparm_attr =
697 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
698 reipl_nss_vmparm_store);
699 static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
700 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
701 reipl_ccw_vmparm_store);
702
703 /* FCP reipl device attributes */
704
705 static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
706 struct bin_attribute *attr,
707 char *buf, loff_t off, size_t count)
708 {
709 size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
710 void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
711
712 return memory_read_from_buffer(buf, count, &off, scp_data, size);
713 }
714
715 static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
716 struct bin_attribute *attr,
717 char *buf, loff_t off, size_t count)
718 {
719 size_t padding;
720 size_t scpdata_len;
721
722 if (off < 0)
723 return -EINVAL;
724
725 if (off >= DIAG308_SCPDATA_SIZE)
726 return -ENOSPC;
727
728 if (count > DIAG308_SCPDATA_SIZE - off)
729 count = DIAG308_SCPDATA_SIZE - off;
730
731 memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf + off, count);
732 scpdata_len = off + count;
733
734 if (scpdata_len % 8) {
735 padding = 8 - (scpdata_len % 8);
736 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
737 0, padding);
738 scpdata_len += padding;
739 }
740
741 reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
742 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
743 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
744
745 return count;
746 }
747
748 static struct bin_attribute sys_reipl_fcp_scp_data_attr = {
749 .attr = {
750 .name = "scp_data",
751 .mode = S_IRUGO | S_IWUSR,
752 },
753 .size = PAGE_SIZE,
754 .read = reipl_fcp_scpdata_read,
755 .write = reipl_fcp_scpdata_write,
756 };
757
758 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n",
759 reipl_block_fcp->ipl_info.fcp.wwpn);
760 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n",
761 reipl_block_fcp->ipl_info.fcp.lun);
762 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
763 reipl_block_fcp->ipl_info.fcp.bootprog);
764 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
765 reipl_block_fcp->ipl_info.fcp.br_lba);
766 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
767 reipl_block_fcp->ipl_info.fcp.devno);
768
769 static void reipl_get_ascii_loadparm(char *loadparm,
770 struct ipl_parameter_block *ibp)
771 {
772 memcpy(loadparm, ibp->hdr.loadparm, LOADPARM_LEN);
773 EBCASC(loadparm, LOADPARM_LEN);
774 loadparm[LOADPARM_LEN] = 0;
775 strim(loadparm);
776 }
777
778 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
779 char *page)
780 {
781 char buf[LOADPARM_LEN + 1];
782
783 reipl_get_ascii_loadparm(buf, ipb);
784 return sprintf(page, "%s\n", buf);
785 }
786
787 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
788 const char *buf, size_t len)
789 {
790 int i, lp_len;
791
792 /* ignore trailing newline */
793 lp_len = len;
794 if ((len > 0) && (buf[len - 1] == '\n'))
795 lp_len--;
796 /* loadparm can have max 8 characters and must not start with a blank */
797 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
798 return -EINVAL;
799 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
800 for (i = 0; i < lp_len; i++) {
801 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
802 (buf[i] == '.'))
803 continue;
804 return -EINVAL;
805 }
806 /* initialize loadparm with blanks */
807 memset(ipb->hdr.loadparm, ' ', LOADPARM_LEN);
808 /* copy and convert to ebcdic */
809 memcpy(ipb->hdr.loadparm, buf, lp_len);
810 ASCEBC(ipb->hdr.loadparm, LOADPARM_LEN);
811 return len;
812 }
813
814 /* FCP wrapper */
815 static ssize_t reipl_fcp_loadparm_show(struct kobject *kobj,
816 struct kobj_attribute *attr, char *page)
817 {
818 return reipl_generic_loadparm_show(reipl_block_fcp, page);
819 }
820
821 static ssize_t reipl_fcp_loadparm_store(struct kobject *kobj,
822 struct kobj_attribute *attr,
823 const char *buf, size_t len)
824 {
825 return reipl_generic_loadparm_store(reipl_block_fcp, buf, len);
826 }
827
828 static struct kobj_attribute sys_reipl_fcp_loadparm_attr =
829 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_fcp_loadparm_show,
830 reipl_fcp_loadparm_store);
831
832 static struct attribute *reipl_fcp_attrs[] = {
833 &sys_reipl_fcp_device_attr.attr,
834 &sys_reipl_fcp_wwpn_attr.attr,
835 &sys_reipl_fcp_lun_attr.attr,
836 &sys_reipl_fcp_bootprog_attr.attr,
837 &sys_reipl_fcp_br_lba_attr.attr,
838 &sys_reipl_fcp_loadparm_attr.attr,
839 NULL,
840 };
841
842 static struct attribute_group reipl_fcp_attr_group = {
843 .attrs = reipl_fcp_attrs,
844 };
845
846 /* CCW reipl device attributes */
847
848 DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
849 reipl_block_ccw->ipl_info.ccw.devno);
850
851 /* NSS wrapper */
852 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
853 struct kobj_attribute *attr, char *page)
854 {
855 return reipl_generic_loadparm_show(reipl_block_nss, page);
856 }
857
858 static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
859 struct kobj_attribute *attr,
860 const char *buf, size_t len)
861 {
862 return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
863 }
864
865 /* CCW wrapper */
866 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
867 struct kobj_attribute *attr, char *page)
868 {
869 return reipl_generic_loadparm_show(reipl_block_ccw, page);
870 }
871
872 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
873 struct kobj_attribute *attr,
874 const char *buf, size_t len)
875 {
876 return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
877 }
878
879 static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
880 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
881 reipl_ccw_loadparm_store);
882
883 static struct attribute *reipl_ccw_attrs_vm[] = {
884 &sys_reipl_ccw_device_attr.attr,
885 &sys_reipl_ccw_loadparm_attr.attr,
886 &sys_reipl_ccw_vmparm_attr.attr,
887 NULL,
888 };
889
890 static struct attribute *reipl_ccw_attrs_lpar[] = {
891 &sys_reipl_ccw_device_attr.attr,
892 &sys_reipl_ccw_loadparm_attr.attr,
893 NULL,
894 };
895
896 static struct attribute_group reipl_ccw_attr_group_vm = {
897 .name = IPL_CCW_STR,
898 .attrs = reipl_ccw_attrs_vm,
899 };
900
901 static struct attribute_group reipl_ccw_attr_group_lpar = {
902 .name = IPL_CCW_STR,
903 .attrs = reipl_ccw_attrs_lpar,
904 };
905
906
907 /* NSS reipl device attributes */
908 static void reipl_get_ascii_nss_name(char *dst,
909 struct ipl_parameter_block *ipb)
910 {
911 memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
912 EBCASC(dst, NSS_NAME_SIZE);
913 dst[NSS_NAME_SIZE] = 0;
914 }
915
916 static ssize_t reipl_nss_name_show(struct kobject *kobj,
917 struct kobj_attribute *attr, char *page)
918 {
919 char nss_name[NSS_NAME_SIZE + 1] = {};
920
921 reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
922 return sprintf(page, "%s\n", nss_name);
923 }
924
925 static ssize_t reipl_nss_name_store(struct kobject *kobj,
926 struct kobj_attribute *attr,
927 const char *buf, size_t len)
928 {
929 int nss_len;
930
931 /* ignore trailing newline */
932 nss_len = len;
933 if ((len > 0) && (buf[len - 1] == '\n'))
934 nss_len--;
935
936 if (nss_len > NSS_NAME_SIZE)
937 return -EINVAL;
938
939 memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
940 if (nss_len > 0) {
941 reipl_block_nss->ipl_info.ccw.vm_flags |=
942 DIAG308_VM_FLAGS_NSS_VALID;
943 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
944 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
945 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
946 } else {
947 reipl_block_nss->ipl_info.ccw.vm_flags &=
948 ~DIAG308_VM_FLAGS_NSS_VALID;
949 }
950
951 return len;
952 }
953
954 static struct kobj_attribute sys_reipl_nss_name_attr =
955 __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
956 reipl_nss_name_store);
957
958 static struct kobj_attribute sys_reipl_nss_loadparm_attr =
959 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
960 reipl_nss_loadparm_store);
961
962 static struct attribute *reipl_nss_attrs[] = {
963 &sys_reipl_nss_name_attr.attr,
964 &sys_reipl_nss_loadparm_attr.attr,
965 &sys_reipl_nss_vmparm_attr.attr,
966 NULL,
967 };
968
969 static struct attribute_group reipl_nss_attr_group = {
970 .name = IPL_NSS_STR,
971 .attrs = reipl_nss_attrs,
972 };
973
974 static void set_reipl_block_actual(struct ipl_parameter_block *reipl_block)
975 {
976 reipl_block_actual = reipl_block;
977 os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual,
978 reipl_block->hdr.len);
979 }
980
981 /* reipl type */
982
983 static int reipl_set_type(enum ipl_type type)
984 {
985 if (!(reipl_capabilities & type))
986 return -EINVAL;
987
988 switch(type) {
989 case IPL_TYPE_CCW:
990 if (diag308_set_works)
991 reipl_method = REIPL_METHOD_CCW_DIAG;
992 else if (MACHINE_IS_VM)
993 reipl_method = REIPL_METHOD_CCW_VM;
994 else
995 reipl_method = REIPL_METHOD_CCW_CIO;
996 set_reipl_block_actual(reipl_block_ccw);
997 break;
998 case IPL_TYPE_FCP:
999 if (diag308_set_works)
1000 reipl_method = REIPL_METHOD_FCP_RW_DIAG;
1001 else if (MACHINE_IS_VM)
1002 reipl_method = REIPL_METHOD_FCP_RO_VM;
1003 else
1004 reipl_method = REIPL_METHOD_FCP_RO_DIAG;
1005 set_reipl_block_actual(reipl_block_fcp);
1006 break;
1007 case IPL_TYPE_FCP_DUMP:
1008 reipl_method = REIPL_METHOD_FCP_DUMP;
1009 break;
1010 case IPL_TYPE_NSS:
1011 if (diag308_set_works)
1012 reipl_method = REIPL_METHOD_NSS_DIAG;
1013 else
1014 reipl_method = REIPL_METHOD_NSS;
1015 set_reipl_block_actual(reipl_block_nss);
1016 break;
1017 case IPL_TYPE_UNKNOWN:
1018 reipl_method = REIPL_METHOD_DEFAULT;
1019 break;
1020 default:
1021 BUG();
1022 }
1023 reipl_type = type;
1024 return 0;
1025 }
1026
1027 static ssize_t reipl_type_show(struct kobject *kobj,
1028 struct kobj_attribute *attr, char *page)
1029 {
1030 return sprintf(page, "%s\n", ipl_type_str(reipl_type));
1031 }
1032
1033 static ssize_t reipl_type_store(struct kobject *kobj,
1034 struct kobj_attribute *attr,
1035 const char *buf, size_t len)
1036 {
1037 int rc = -EINVAL;
1038
1039 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1040 rc = reipl_set_type(IPL_TYPE_CCW);
1041 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1042 rc = reipl_set_type(IPL_TYPE_FCP);
1043 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1044 rc = reipl_set_type(IPL_TYPE_NSS);
1045 return (rc != 0) ? rc : len;
1046 }
1047
1048 static struct kobj_attribute reipl_type_attr =
1049 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
1050
1051 static struct kset *reipl_kset;
1052 static struct kset *reipl_fcp_kset;
1053
1054 static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
1055 const enum ipl_method m)
1056 {
1057 char loadparm[LOADPARM_LEN + 1] = {};
1058 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
1059 char nss_name[NSS_NAME_SIZE + 1] = {};
1060 size_t pos = 0;
1061
1062 reipl_get_ascii_loadparm(loadparm, ipb);
1063 reipl_get_ascii_nss_name(nss_name, ipb);
1064 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
1065
1066 switch (m) {
1067 case REIPL_METHOD_CCW_VM:
1068 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
1069 break;
1070 case REIPL_METHOD_NSS:
1071 pos = sprintf(dst, "IPL %s", nss_name);
1072 break;
1073 default:
1074 break;
1075 }
1076 if (strlen(loadparm) > 0)
1077 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
1078 if (strlen(vmparm) > 0)
1079 sprintf(dst + pos, " PARM %s", vmparm);
1080 }
1081
1082 static void __reipl_run(void *unused)
1083 {
1084 struct ccw_dev_id devid;
1085 static char buf[128];
1086
1087 switch (reipl_method) {
1088 case REIPL_METHOD_CCW_CIO:
1089 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
1090 devid.ssid = 0;
1091 reipl_ccw_dev(&devid);
1092 break;
1093 case REIPL_METHOD_CCW_VM:
1094 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
1095 __cpcmd(buf, NULL, 0, NULL);
1096 break;
1097 case REIPL_METHOD_CCW_DIAG:
1098 diag308(DIAG308_SET, reipl_block_ccw);
1099 diag308(DIAG308_IPL, NULL);
1100 break;
1101 case REIPL_METHOD_FCP_RW_DIAG:
1102 diag308(DIAG308_SET, reipl_block_fcp);
1103 diag308(DIAG308_IPL, NULL);
1104 break;
1105 case REIPL_METHOD_FCP_RO_DIAG:
1106 diag308(DIAG308_IPL, NULL);
1107 break;
1108 case REIPL_METHOD_FCP_RO_VM:
1109 __cpcmd("IPL", NULL, 0, NULL);
1110 break;
1111 case REIPL_METHOD_NSS_DIAG:
1112 diag308(DIAG308_SET, reipl_block_nss);
1113 diag308(DIAG308_IPL, NULL);
1114 break;
1115 case REIPL_METHOD_NSS:
1116 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
1117 __cpcmd(buf, NULL, 0, NULL);
1118 break;
1119 case REIPL_METHOD_DEFAULT:
1120 if (MACHINE_IS_VM)
1121 __cpcmd("IPL", NULL, 0, NULL);
1122 diag308(DIAG308_IPL, NULL);
1123 break;
1124 case REIPL_METHOD_FCP_DUMP:
1125 break;
1126 }
1127 disabled_wait((unsigned long) __builtin_return_address(0));
1128 }
1129
1130 static void reipl_run(struct shutdown_trigger *trigger)
1131 {
1132 smp_call_ipl_cpu(__reipl_run, NULL);
1133 }
1134
1135 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
1136 {
1137 ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
1138 ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1139 ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1140 ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1141 }
1142
1143 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1144 {
1145 /* LOADPARM */
1146 /* check if read scp info worked and set loadparm */
1147 if (sclp_ipl_info.is_valid)
1148 memcpy(ipb->hdr.loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
1149 else
1150 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1151 memset(ipb->hdr.loadparm, 0x40, LOADPARM_LEN);
1152 ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
1153
1154 /* VM PARM */
1155 if (MACHINE_IS_VM && diag308_set_works &&
1156 (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1157
1158 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1159 ipb->ipl_info.ccw.vm_parm_len =
1160 ipl_block.ipl_info.ccw.vm_parm_len;
1161 memcpy(ipb->ipl_info.ccw.vm_parm,
1162 ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1163 }
1164 }
1165
1166 static int __init reipl_nss_init(void)
1167 {
1168 int rc;
1169
1170 if (!MACHINE_IS_VM)
1171 return 0;
1172
1173 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1174 if (!reipl_block_nss)
1175 return -ENOMEM;
1176
1177 if (!diag308_set_works)
1178 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO;
1179
1180 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1181 if (rc)
1182 return rc;
1183
1184 reipl_block_ccw_init(reipl_block_nss);
1185 if (ipl_info.type == IPL_TYPE_NSS) {
1186 memset(reipl_block_nss->ipl_info.ccw.nss_name,
1187 ' ', NSS_NAME_SIZE);
1188 memcpy(reipl_block_nss->ipl_info.ccw.nss_name,
1189 kernel_nss_name, strlen(kernel_nss_name));
1190 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
1191 reipl_block_nss->ipl_info.ccw.vm_flags |=
1192 DIAG308_VM_FLAGS_NSS_VALID;
1193
1194 reipl_block_ccw_fill_parms(reipl_block_nss);
1195 }
1196
1197 reipl_capabilities |= IPL_TYPE_NSS;
1198 return 0;
1199 }
1200
1201 static int __init reipl_ccw_init(void)
1202 {
1203 int rc;
1204
1205 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1206 if (!reipl_block_ccw)
1207 return -ENOMEM;
1208
1209 if (MACHINE_IS_VM) {
1210 if (!diag308_set_works)
1211 sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
1212 rc = sysfs_create_group(&reipl_kset->kobj,
1213 &reipl_ccw_attr_group_vm);
1214 } else {
1215 if(!diag308_set_works)
1216 sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
1217 rc = sysfs_create_group(&reipl_kset->kobj,
1218 &reipl_ccw_attr_group_lpar);
1219 }
1220 if (rc)
1221 return rc;
1222
1223 reipl_block_ccw_init(reipl_block_ccw);
1224 if (ipl_info.type == IPL_TYPE_CCW) {
1225 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
1226 reipl_block_ccw_fill_parms(reipl_block_ccw);
1227 }
1228
1229 reipl_capabilities |= IPL_TYPE_CCW;
1230 return 0;
1231 }
1232
1233 static int __init reipl_fcp_init(void)
1234 {
1235 int rc;
1236
1237 if (!diag308_set_works) {
1238 if (ipl_info.type == IPL_TYPE_FCP) {
1239 make_attrs_ro(reipl_fcp_attrs);
1240 sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO;
1241 } else
1242 return 0;
1243 }
1244
1245 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1246 if (!reipl_block_fcp)
1247 return -ENOMEM;
1248
1249 /* sysfs: create fcp kset for mixing attr group and bin attrs */
1250 reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1251 &reipl_kset->kobj);
1252 if (!reipl_fcp_kset) {
1253 free_page((unsigned long) reipl_block_fcp);
1254 return -ENOMEM;
1255 }
1256
1257 rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1258 if (rc) {
1259 kset_unregister(reipl_fcp_kset);
1260 free_page((unsigned long) reipl_block_fcp);
1261 return rc;
1262 }
1263
1264 rc = sysfs_create_bin_file(&reipl_fcp_kset->kobj,
1265 &sys_reipl_fcp_scp_data_attr);
1266 if (rc) {
1267 sysfs_remove_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1268 kset_unregister(reipl_fcp_kset);
1269 free_page((unsigned long) reipl_block_fcp);
1270 return rc;
1271 }
1272
1273 if (ipl_info.type == IPL_TYPE_FCP) {
1274 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
1275 /*
1276 * Fix loadparm: There are systems where the (SCSI) LOADPARM
1277 * is invalid in the SCSI IPL parameter block, so take it
1278 * always from sclp_ipl_info.
1279 */
1280 memcpy(reipl_block_fcp->hdr.loadparm, sclp_ipl_info.loadparm,
1281 LOADPARM_LEN);
1282 } else {
1283 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1284 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1285 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1286 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1287 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1288 }
1289 reipl_capabilities |= IPL_TYPE_FCP;
1290 return 0;
1291 }
1292
1293 static int __init reipl_type_init(void)
1294 {
1295 enum ipl_type reipl_type = ipl_info.type;
1296 struct ipl_parameter_block *reipl_block;
1297 unsigned long size;
1298
1299 reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size);
1300 if (!reipl_block)
1301 goto out;
1302 /*
1303 * If we have an OS info reipl block, this will be used
1304 */
1305 if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_FCP) {
1306 memcpy(reipl_block_fcp, reipl_block, size);
1307 reipl_type = IPL_TYPE_FCP;
1308 } else if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_CCW) {
1309 memcpy(reipl_block_ccw, reipl_block, size);
1310 reipl_type = IPL_TYPE_CCW;
1311 }
1312 out:
1313 return reipl_set_type(reipl_type);
1314 }
1315
1316 static int __init reipl_init(void)
1317 {
1318 int rc;
1319
1320 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1321 if (!reipl_kset)
1322 return -ENOMEM;
1323 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1324 if (rc) {
1325 kset_unregister(reipl_kset);
1326 return rc;
1327 }
1328 rc = reipl_ccw_init();
1329 if (rc)
1330 return rc;
1331 rc = reipl_fcp_init();
1332 if (rc)
1333 return rc;
1334 rc = reipl_nss_init();
1335 if (rc)
1336 return rc;
1337 return reipl_type_init();
1338 }
1339
1340 static struct shutdown_action __refdata reipl_action = {
1341 .name = SHUTDOWN_ACTION_REIPL_STR,
1342 .fn = reipl_run,
1343 .init = reipl_init,
1344 };
1345
1346 /*
1347 * dump shutdown action: Dump Linux on shutdown.
1348 */
1349
1350 /* FCP dump device attributes */
1351
1352 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n",
1353 dump_block_fcp->ipl_info.fcp.wwpn);
1354 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n",
1355 dump_block_fcp->ipl_info.fcp.lun);
1356 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1357 dump_block_fcp->ipl_info.fcp.bootprog);
1358 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1359 dump_block_fcp->ipl_info.fcp.br_lba);
1360 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1361 dump_block_fcp->ipl_info.fcp.devno);
1362
1363 static struct attribute *dump_fcp_attrs[] = {
1364 &sys_dump_fcp_device_attr.attr,
1365 &sys_dump_fcp_wwpn_attr.attr,
1366 &sys_dump_fcp_lun_attr.attr,
1367 &sys_dump_fcp_bootprog_attr.attr,
1368 &sys_dump_fcp_br_lba_attr.attr,
1369 NULL,
1370 };
1371
1372 static struct attribute_group dump_fcp_attr_group = {
1373 .name = IPL_FCP_STR,
1374 .attrs = dump_fcp_attrs,
1375 };
1376
1377 /* CCW dump device attributes */
1378
1379 DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
1380 dump_block_ccw->ipl_info.ccw.devno);
1381
1382 static struct attribute *dump_ccw_attrs[] = {
1383 &sys_dump_ccw_device_attr.attr,
1384 NULL,
1385 };
1386
1387 static struct attribute_group dump_ccw_attr_group = {
1388 .name = IPL_CCW_STR,
1389 .attrs = dump_ccw_attrs,
1390 };
1391
1392 /* dump type */
1393
1394 static int dump_set_type(enum dump_type type)
1395 {
1396 if (!(dump_capabilities & type))
1397 return -EINVAL;
1398 switch (type) {
1399 case DUMP_TYPE_CCW:
1400 if (diag308_set_works)
1401 dump_method = DUMP_METHOD_CCW_DIAG;
1402 else if (MACHINE_IS_VM)
1403 dump_method = DUMP_METHOD_CCW_VM;
1404 else
1405 dump_method = DUMP_METHOD_CCW_CIO;
1406 break;
1407 case DUMP_TYPE_FCP:
1408 dump_method = DUMP_METHOD_FCP_DIAG;
1409 break;
1410 default:
1411 dump_method = DUMP_METHOD_NONE;
1412 }
1413 dump_type = type;
1414 return 0;
1415 }
1416
1417 static ssize_t dump_type_show(struct kobject *kobj,
1418 struct kobj_attribute *attr, char *page)
1419 {
1420 return sprintf(page, "%s\n", dump_type_str(dump_type));
1421 }
1422
1423 static ssize_t dump_type_store(struct kobject *kobj,
1424 struct kobj_attribute *attr,
1425 const char *buf, size_t len)
1426 {
1427 int rc = -EINVAL;
1428
1429 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1430 rc = dump_set_type(DUMP_TYPE_NONE);
1431 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1432 rc = dump_set_type(DUMP_TYPE_CCW);
1433 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1434 rc = dump_set_type(DUMP_TYPE_FCP);
1435 return (rc != 0) ? rc : len;
1436 }
1437
1438 static struct kobj_attribute dump_type_attr =
1439 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1440
1441 static struct kset *dump_kset;
1442
1443 static void diag308_dump(void *dump_block)
1444 {
1445 diag308(DIAG308_SET, dump_block);
1446 while (1) {
1447 if (diag308(DIAG308_DUMP, NULL) != 0x302)
1448 break;
1449 udelay_simple(USEC_PER_SEC);
1450 }
1451 }
1452
1453 static void __dump_run(void *unused)
1454 {
1455 struct ccw_dev_id devid;
1456 static char buf[100];
1457
1458 switch (dump_method) {
1459 case DUMP_METHOD_CCW_CIO:
1460 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
1461 devid.ssid = 0;
1462 reipl_ccw_dev(&devid);
1463 break;
1464 case DUMP_METHOD_CCW_VM:
1465 sprintf(buf, "STORE STATUS");
1466 __cpcmd(buf, NULL, 0, NULL);
1467 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
1468 __cpcmd(buf, NULL, 0, NULL);
1469 break;
1470 case DUMP_METHOD_CCW_DIAG:
1471 diag308_dump(dump_block_ccw);
1472 break;
1473 case DUMP_METHOD_FCP_DIAG:
1474 diag308_dump(dump_block_fcp);
1475 break;
1476 default:
1477 break;
1478 }
1479 }
1480
1481 static void dump_run(struct shutdown_trigger *trigger)
1482 {
1483 if (dump_method == DUMP_METHOD_NONE)
1484 return;
1485 smp_send_stop();
1486 smp_call_ipl_cpu(__dump_run, NULL);
1487 }
1488
1489 static int __init dump_ccw_init(void)
1490 {
1491 int rc;
1492
1493 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1494 if (!dump_block_ccw)
1495 return -ENOMEM;
1496 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1497 if (rc) {
1498 free_page((unsigned long)dump_block_ccw);
1499 return rc;
1500 }
1501 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1502 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1503 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1504 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1505 dump_capabilities |= DUMP_TYPE_CCW;
1506 return 0;
1507 }
1508
1509 static int __init dump_fcp_init(void)
1510 {
1511 int rc;
1512
1513 if (!sclp_ipl_info.has_dump)
1514 return 0; /* LDIPL DUMP is not installed */
1515 if (!diag308_set_works)
1516 return 0;
1517 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1518 if (!dump_block_fcp)
1519 return -ENOMEM;
1520 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1521 if (rc) {
1522 free_page((unsigned long)dump_block_fcp);
1523 return rc;
1524 }
1525 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1526 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1527 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1528 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1529 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1530 dump_capabilities |= DUMP_TYPE_FCP;
1531 return 0;
1532 }
1533
1534 static int __init dump_init(void)
1535 {
1536 int rc;
1537
1538 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1539 if (!dump_kset)
1540 return -ENOMEM;
1541 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1542 if (rc) {
1543 kset_unregister(dump_kset);
1544 return rc;
1545 }
1546 rc = dump_ccw_init();
1547 if (rc)
1548 return rc;
1549 rc = dump_fcp_init();
1550 if (rc)
1551 return rc;
1552 dump_set_type(DUMP_TYPE_NONE);
1553 return 0;
1554 }
1555
1556 static struct shutdown_action __refdata dump_action = {
1557 .name = SHUTDOWN_ACTION_DUMP_STR,
1558 .fn = dump_run,
1559 .init = dump_init,
1560 };
1561
1562 static void dump_reipl_run(struct shutdown_trigger *trigger)
1563 {
1564 unsigned long ipib = (unsigned long) reipl_block_actual;
1565 unsigned int csum;
1566
1567 csum = csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
1568 mem_assign_absolute(S390_lowcore.ipib, ipib);
1569 mem_assign_absolute(S390_lowcore.ipib_checksum, csum);
1570 dump_run(trigger);
1571 }
1572
1573 static int __init dump_reipl_init(void)
1574 {
1575 if (!diag308_set_works)
1576 return -EOPNOTSUPP;
1577 else
1578 return 0;
1579 }
1580
1581 static struct shutdown_action __refdata dump_reipl_action = {
1582 .name = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1583 .fn = dump_reipl_run,
1584 .init = dump_reipl_init,
1585 };
1586
1587 /*
1588 * vmcmd shutdown action: Trigger vm command on shutdown.
1589 */
1590
1591 static char vmcmd_on_reboot[128];
1592 static char vmcmd_on_panic[128];
1593 static char vmcmd_on_halt[128];
1594 static char vmcmd_on_poff[128];
1595 static char vmcmd_on_restart[128];
1596
1597 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1598 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1599 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1600 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1601 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1602
1603 static struct attribute *vmcmd_attrs[] = {
1604 &sys_vmcmd_on_reboot_attr.attr,
1605 &sys_vmcmd_on_panic_attr.attr,
1606 &sys_vmcmd_on_halt_attr.attr,
1607 &sys_vmcmd_on_poff_attr.attr,
1608 &sys_vmcmd_on_restart_attr.attr,
1609 NULL,
1610 };
1611
1612 static struct attribute_group vmcmd_attr_group = {
1613 .attrs = vmcmd_attrs,
1614 };
1615
1616 static struct kset *vmcmd_kset;
1617
1618 static void vmcmd_run(struct shutdown_trigger *trigger)
1619 {
1620 char *cmd;
1621
1622 if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1623 cmd = vmcmd_on_reboot;
1624 else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1625 cmd = vmcmd_on_panic;
1626 else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1627 cmd = vmcmd_on_halt;
1628 else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1629 cmd = vmcmd_on_poff;
1630 else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
1631 cmd = vmcmd_on_restart;
1632 else
1633 return;
1634
1635 if (strlen(cmd) == 0)
1636 return;
1637 __cpcmd(cmd, NULL, 0, NULL);
1638 }
1639
1640 static int vmcmd_init(void)
1641 {
1642 if (!MACHINE_IS_VM)
1643 return -EOPNOTSUPP;
1644 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1645 if (!vmcmd_kset)
1646 return -ENOMEM;
1647 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1648 }
1649
1650 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1651 vmcmd_run, vmcmd_init};
1652
1653 /*
1654 * stop shutdown action: Stop Linux on shutdown.
1655 */
1656
1657 static void stop_run(struct shutdown_trigger *trigger)
1658 {
1659 if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
1660 strcmp(trigger->name, ON_RESTART_STR) == 0)
1661 disabled_wait((unsigned long) __builtin_return_address(0));
1662 smp_stop_cpu();
1663 }
1664
1665 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1666 stop_run, NULL};
1667
1668 /* action list */
1669
1670 static struct shutdown_action *shutdown_actions_list[] = {
1671 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1672 &vmcmd_action, &stop_action};
1673 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1674
1675 /*
1676 * Trigger section
1677 */
1678
1679 static struct kset *shutdown_actions_kset;
1680
1681 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1682 size_t len)
1683 {
1684 int i;
1685
1686 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1687 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1688 if (shutdown_actions_list[i]->init_rc) {
1689 return shutdown_actions_list[i]->init_rc;
1690 } else {
1691 trigger->action = shutdown_actions_list[i];
1692 return len;
1693 }
1694 }
1695 }
1696 return -EINVAL;
1697 }
1698
1699 /* on reipl */
1700
1701 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1702 &reipl_action};
1703
1704 static ssize_t on_reboot_show(struct kobject *kobj,
1705 struct kobj_attribute *attr, char *page)
1706 {
1707 return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1708 }
1709
1710 static ssize_t on_reboot_store(struct kobject *kobj,
1711 struct kobj_attribute *attr,
1712 const char *buf, size_t len)
1713 {
1714 return set_trigger(buf, &on_reboot_trigger, len);
1715 }
1716
1717 static struct kobj_attribute on_reboot_attr =
1718 __ATTR(on_reboot, 0644, on_reboot_show, on_reboot_store);
1719
1720 static void do_machine_restart(char *__unused)
1721 {
1722 smp_send_stop();
1723 on_reboot_trigger.action->fn(&on_reboot_trigger);
1724 reipl_run(NULL);
1725 }
1726 void (*_machine_restart)(char *command) = do_machine_restart;
1727
1728 /* on panic */
1729
1730 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1731
1732 static ssize_t on_panic_show(struct kobject *kobj,
1733 struct kobj_attribute *attr, char *page)
1734 {
1735 return sprintf(page, "%s\n", on_panic_trigger.action->name);
1736 }
1737
1738 static ssize_t on_panic_store(struct kobject *kobj,
1739 struct kobj_attribute *attr,
1740 const char *buf, size_t len)
1741 {
1742 return set_trigger(buf, &on_panic_trigger, len);
1743 }
1744
1745 static struct kobj_attribute on_panic_attr =
1746 __ATTR(on_panic, 0644, on_panic_show, on_panic_store);
1747
1748 static void do_panic(void)
1749 {
1750 lgr_info_log();
1751 on_panic_trigger.action->fn(&on_panic_trigger);
1752 stop_run(&on_panic_trigger);
1753 }
1754
1755 /* on restart */
1756
1757 static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
1758 &stop_action};
1759
1760 static ssize_t on_restart_show(struct kobject *kobj,
1761 struct kobj_attribute *attr, char *page)
1762 {
1763 return sprintf(page, "%s\n", on_restart_trigger.action->name);
1764 }
1765
1766 static ssize_t on_restart_store(struct kobject *kobj,
1767 struct kobj_attribute *attr,
1768 const char *buf, size_t len)
1769 {
1770 return set_trigger(buf, &on_restart_trigger, len);
1771 }
1772
1773 static struct kobj_attribute on_restart_attr =
1774 __ATTR(on_restart, 0644, on_restart_show, on_restart_store);
1775
1776 static void __do_restart(void *ignore)
1777 {
1778 __arch_local_irq_stosm(0x04); /* enable DAT */
1779 smp_send_stop();
1780 #ifdef CONFIG_CRASH_DUMP
1781 crash_kexec(NULL);
1782 #endif
1783 on_restart_trigger.action->fn(&on_restart_trigger);
1784 stop_run(&on_restart_trigger);
1785 }
1786
1787 void do_restart(void)
1788 {
1789 tracing_off();
1790 debug_locks_off();
1791 lgr_info_log();
1792 smp_call_online_cpu(__do_restart, NULL);
1793 }
1794
1795 /* on halt */
1796
1797 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1798
1799 static ssize_t on_halt_show(struct kobject *kobj,
1800 struct kobj_attribute *attr, char *page)
1801 {
1802 return sprintf(page, "%s\n", on_halt_trigger.action->name);
1803 }
1804
1805 static ssize_t on_halt_store(struct kobject *kobj,
1806 struct kobj_attribute *attr,
1807 const char *buf, size_t len)
1808 {
1809 return set_trigger(buf, &on_halt_trigger, len);
1810 }
1811
1812 static struct kobj_attribute on_halt_attr =
1813 __ATTR(on_halt, 0644, on_halt_show, on_halt_store);
1814
1815
1816 static void do_machine_halt(void)
1817 {
1818 smp_send_stop();
1819 on_halt_trigger.action->fn(&on_halt_trigger);
1820 stop_run(&on_halt_trigger);
1821 }
1822 void (*_machine_halt)(void) = do_machine_halt;
1823
1824 /* on power off */
1825
1826 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1827
1828 static ssize_t on_poff_show(struct kobject *kobj,
1829 struct kobj_attribute *attr, char *page)
1830 {
1831 return sprintf(page, "%s\n", on_poff_trigger.action->name);
1832 }
1833
1834 static ssize_t on_poff_store(struct kobject *kobj,
1835 struct kobj_attribute *attr,
1836 const char *buf, size_t len)
1837 {
1838 return set_trigger(buf, &on_poff_trigger, len);
1839 }
1840
1841 static struct kobj_attribute on_poff_attr =
1842 __ATTR(on_poff, 0644, on_poff_show, on_poff_store);
1843
1844
1845 static void do_machine_power_off(void)
1846 {
1847 smp_send_stop();
1848 on_poff_trigger.action->fn(&on_poff_trigger);
1849 stop_run(&on_poff_trigger);
1850 }
1851 void (*_machine_power_off)(void) = do_machine_power_off;
1852
1853 static void __init shutdown_triggers_init(void)
1854 {
1855 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1856 firmware_kobj);
1857 if (!shutdown_actions_kset)
1858 goto fail;
1859 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1860 &on_reboot_attr.attr))
1861 goto fail;
1862 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1863 &on_panic_attr.attr))
1864 goto fail;
1865 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1866 &on_halt_attr.attr))
1867 goto fail;
1868 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1869 &on_poff_attr.attr))
1870 goto fail;
1871 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1872 &on_restart_attr.attr))
1873 goto fail;
1874 return;
1875 fail:
1876 panic("shutdown_triggers_init failed\n");
1877 }
1878
1879 static void __init shutdown_actions_init(void)
1880 {
1881 int i;
1882
1883 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1884 if (!shutdown_actions_list[i]->init)
1885 continue;
1886 shutdown_actions_list[i]->init_rc =
1887 shutdown_actions_list[i]->init();
1888 }
1889 }
1890
1891 static int __init s390_ipl_init(void)
1892 {
1893 char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40};
1894
1895 sclp_get_ipl_info(&sclp_ipl_info);
1896 /*
1897 * Fix loadparm: There are systems where the (SCSI) LOADPARM
1898 * returned by read SCP info is invalid (contains EBCDIC blanks)
1899 * when the system has been booted via diag308. In that case we use
1900 * the value from diag308, if available.
1901 *
1902 * There are also systems where diag308 store does not work in
1903 * case the system is booted from HMC. Fortunately in this case
1904 * READ SCP info provides the correct value.
1905 */
1906 if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 &&
1907 diag308_set_works)
1908 memcpy(sclp_ipl_info.loadparm, ipl_block.hdr.loadparm,
1909 LOADPARM_LEN);
1910 shutdown_actions_init();
1911 shutdown_triggers_init();
1912 return 0;
1913 }
1914
1915 __initcall(s390_ipl_init);
1916
1917 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1918 {
1919 int sx, dx;
1920
1921 dx = 0;
1922 for (sx = 0; src[sx] != 0; sx++) {
1923 if (src[sx] == '"')
1924 continue;
1925 dst[dx++] = src[sx];
1926 if (dx >= n)
1927 break;
1928 }
1929 }
1930
1931 static int __init vmcmd_on_reboot_setup(char *str)
1932 {
1933 if (!MACHINE_IS_VM)
1934 return 1;
1935 strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1936 vmcmd_on_reboot[127] = 0;
1937 on_reboot_trigger.action = &vmcmd_action;
1938 return 1;
1939 }
1940 __setup("vmreboot=", vmcmd_on_reboot_setup);
1941
1942 static int __init vmcmd_on_panic_setup(char *str)
1943 {
1944 if (!MACHINE_IS_VM)
1945 return 1;
1946 strncpy_skip_quote(vmcmd_on_panic, str, 127);
1947 vmcmd_on_panic[127] = 0;
1948 on_panic_trigger.action = &vmcmd_action;
1949 return 1;
1950 }
1951 __setup("vmpanic=", vmcmd_on_panic_setup);
1952
1953 static int __init vmcmd_on_halt_setup(char *str)
1954 {
1955 if (!MACHINE_IS_VM)
1956 return 1;
1957 strncpy_skip_quote(vmcmd_on_halt, str, 127);
1958 vmcmd_on_halt[127] = 0;
1959 on_halt_trigger.action = &vmcmd_action;
1960 return 1;
1961 }
1962 __setup("vmhalt=", vmcmd_on_halt_setup);
1963
1964 static int __init vmcmd_on_poff_setup(char *str)
1965 {
1966 if (!MACHINE_IS_VM)
1967 return 1;
1968 strncpy_skip_quote(vmcmd_on_poff, str, 127);
1969 vmcmd_on_poff[127] = 0;
1970 on_poff_trigger.action = &vmcmd_action;
1971 return 1;
1972 }
1973 __setup("vmpoff=", vmcmd_on_poff_setup);
1974
1975 static int on_panic_notify(struct notifier_block *self,
1976 unsigned long event, void *data)
1977 {
1978 do_panic();
1979 return NOTIFY_OK;
1980 }
1981
1982 static struct notifier_block on_panic_nb = {
1983 .notifier_call = on_panic_notify,
1984 .priority = INT_MIN,
1985 };
1986
1987 void __init setup_ipl(void)
1988 {
1989 ipl_info.type = get_ipl_type();
1990 switch (ipl_info.type) {
1991 case IPL_TYPE_CCW:
1992 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1993 ipl_info.data.ccw.dev_id.ssid = 0;
1994 break;
1995 case IPL_TYPE_FCP:
1996 case IPL_TYPE_FCP_DUMP:
1997 ipl_info.data.fcp.dev_id.devno =
1998 IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1999 ipl_info.data.fcp.dev_id.ssid = 0;
2000 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
2001 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
2002 break;
2003 case IPL_TYPE_NSS:
2004 strncpy(ipl_info.data.nss.name, kernel_nss_name,
2005 sizeof(ipl_info.data.nss.name));
2006 break;
2007 case IPL_TYPE_UNKNOWN:
2008 /* We have no info to copy */
2009 break;
2010 }
2011 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
2012 }
2013
2014 void __init ipl_update_parameters(void)
2015 {
2016 int rc;
2017
2018 rc = diag308(DIAG308_STORE, &ipl_block);
2019 if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
2020 diag308_set_works = 1;
2021 }
2022
2023 void __init ipl_save_parameters(void)
2024 {
2025 struct cio_iplinfo iplinfo;
2026 void *src, *dst;
2027
2028 if (cio_get_iplinfo(&iplinfo))
2029 return;
2030
2031 ipl_devno = iplinfo.devno;
2032 ipl_flags |= IPL_DEVNO_VALID;
2033 if (!iplinfo.is_qdio)
2034 return;
2035 ipl_flags |= IPL_PARMBLOCK_VALID;
2036 src = (void *)(unsigned long)S390_lowcore.ipl_parmblock_ptr;
2037 dst = (void *)IPL_PARMBLOCK_ORIGIN;
2038 memmove(dst, src, PAGE_SIZE);
2039 S390_lowcore.ipl_parmblock_ptr = IPL_PARMBLOCK_ORIGIN;
2040 }
2041
2042 static LIST_HEAD(rcall);
2043 static DEFINE_MUTEX(rcall_mutex);
2044
2045 void register_reset_call(struct reset_call *reset)
2046 {
2047 mutex_lock(&rcall_mutex);
2048 list_add(&reset->list, &rcall);
2049 mutex_unlock(&rcall_mutex);
2050 }
2051 EXPORT_SYMBOL_GPL(register_reset_call);
2052
2053 void unregister_reset_call(struct reset_call *reset)
2054 {
2055 mutex_lock(&rcall_mutex);
2056 list_del(&reset->list);
2057 mutex_unlock(&rcall_mutex);
2058 }
2059 EXPORT_SYMBOL_GPL(unregister_reset_call);
2060
2061 static void do_reset_calls(void)
2062 {
2063 struct reset_call *reset;
2064
2065 #ifdef CONFIG_64BIT
2066 if (diag308_set_works) {
2067 diag308_reset();
2068 return;
2069 }
2070 #endif
2071 list_for_each_entry(reset, &rcall, list)
2072 reset->fn();
2073 }
2074
2075 u32 dump_prefix_page;
2076
2077 void s390_reset_system(void (*func)(void *), void *data)
2078 {
2079 struct _lowcore *lc;
2080
2081 lc = (struct _lowcore *)(unsigned long) store_prefix();
2082
2083 /* Stack for interrupt/machine check handler */
2084 lc->panic_stack = S390_lowcore.panic_stack;
2085
2086 /* Save prefix page address for dump case */
2087 dump_prefix_page = (u32)(unsigned long) lc;
2088
2089 /* Disable prefixing */
2090 set_prefix(0);
2091
2092 /* Disable lowcore protection */
2093 __ctl_clear_bit(0,28);
2094
2095 /* Set new machine check handler */
2096 S390_lowcore.mcck_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
2097 S390_lowcore.mcck_new_psw.addr =
2098 PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;
2099
2100 /* Set new program check handler */
2101 S390_lowcore.program_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
2102 S390_lowcore.program_new_psw.addr =
2103 PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
2104
2105 /*
2106 * Clear subchannel ID and number to signal new kernel that no CCW or
2107 * SCSI IPL has been done (for kexec and kdump)
2108 */
2109 S390_lowcore.subchannel_id = 0;
2110 S390_lowcore.subchannel_nr = 0;
2111
2112 /* Store status at absolute zero */
2113 store_status();
2114
2115 do_reset_calls();
2116 if (func)
2117 func(data);
2118 }
Linux with added FPC-III support