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10#include <linux/types.h>
11#include <linux/export.h>
12#include <linux/init.h>
13#include <linux/device.h>
14#include <linux/delay.h>
15#include <linux/reboot.h>
16#include <linux/ctype.h>
17#include <linux/fs.h>
18#include <linux/gfp.h>
19#include <linux/crash_dump.h>
20#include <linux/debug_locks.h>
21#include <asm/diag.h>
22#include <asm/ipl.h>
23#include <asm/smp.h>
24#include <asm/setup.h>
25#include <asm/cpcmd.h>
26#include <asm/cio.h>
27#include <asm/ebcdic.h>
28#include <asm/reset.h>
29#include <asm/sclp.h>
30#include <asm/checksum.h>
31#include <asm/debug.h>
32#include <asm/os_info.h>
33#include "entry.h"
34
35#define IPL_PARM_BLOCK_VERSION 0
36
37#define IPL_UNKNOWN_STR "unknown"
38#define IPL_CCW_STR "ccw"
39#define IPL_FCP_STR "fcp"
40#define IPL_FCP_DUMP_STR "fcp_dump"
41#define IPL_NSS_STR "nss"
42
43#define DUMP_CCW_STR "ccw"
44#define DUMP_FCP_STR "fcp"
45#define DUMP_NONE_STR "none"
46
47
48
49
50
51
52
53
54
55#define ON_PANIC_STR "on_panic"
56#define ON_HALT_STR "on_halt"
57#define ON_POFF_STR "on_poff"
58#define ON_REIPL_STR "on_reboot"
59#define ON_RESTART_STR "on_restart"
60
61struct shutdown_action;
62struct shutdown_trigger {
63 char *name;
64 struct shutdown_action *action;
65};
66
67
68
69
70#define SHUTDOWN_ACTION_IPL_STR "ipl"
71#define SHUTDOWN_ACTION_REIPL_STR "reipl"
72#define SHUTDOWN_ACTION_DUMP_STR "dump"
73#define SHUTDOWN_ACTION_VMCMD_STR "vmcmd"
74#define SHUTDOWN_ACTION_STOP_STR "stop"
75#define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl"
76
77struct shutdown_action {
78 char *name;
79 void (*fn) (struct shutdown_trigger *trigger);
80 int (*init) (void);
81 int init_rc;
82};
83
84static char *ipl_type_str(enum ipl_type type)
85{
86 switch (type) {
87 case IPL_TYPE_CCW:
88 return IPL_CCW_STR;
89 case IPL_TYPE_FCP:
90 return IPL_FCP_STR;
91 case IPL_TYPE_FCP_DUMP:
92 return IPL_FCP_DUMP_STR;
93 case IPL_TYPE_NSS:
94 return IPL_NSS_STR;
95 case IPL_TYPE_UNKNOWN:
96 default:
97 return IPL_UNKNOWN_STR;
98 }
99}
100
101enum dump_type {
102 DUMP_TYPE_NONE = 1,
103 DUMP_TYPE_CCW = 2,
104 DUMP_TYPE_FCP = 4,
105};
106
107static char *dump_type_str(enum dump_type type)
108{
109 switch (type) {
110 case DUMP_TYPE_NONE:
111 return DUMP_NONE_STR;
112 case DUMP_TYPE_CCW:
113 return DUMP_CCW_STR;
114 case DUMP_TYPE_FCP:
115 return DUMP_FCP_STR;
116 default:
117 return NULL;
118 }
119}
120
121
122
123
124
125static u8 ipl_ssid __section(.data) = 0;
126static u16 ipl_devno __section(.data) = 0;
127u32 ipl_flags __section(.data) = 0;
128
129enum ipl_method {
130 REIPL_METHOD_CCW_CIO,
131 REIPL_METHOD_CCW_DIAG,
132 REIPL_METHOD_CCW_VM,
133 REIPL_METHOD_FCP_RO_DIAG,
134 REIPL_METHOD_FCP_RW_DIAG,
135 REIPL_METHOD_FCP_RO_VM,
136 REIPL_METHOD_FCP_DUMP,
137 REIPL_METHOD_NSS,
138 REIPL_METHOD_NSS_DIAG,
139 REIPL_METHOD_DEFAULT,
140};
141
142enum dump_method {
143 DUMP_METHOD_NONE,
144 DUMP_METHOD_CCW_CIO,
145 DUMP_METHOD_CCW_DIAG,
146 DUMP_METHOD_CCW_VM,
147 DUMP_METHOD_FCP_DIAG,
148};
149
150static int diag308_set_works = 0;
151
152static struct ipl_parameter_block ipl_block;
153
154static int reipl_capabilities = IPL_TYPE_UNKNOWN;
155
156static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
157static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
158static struct ipl_parameter_block *reipl_block_fcp;
159static struct ipl_parameter_block *reipl_block_ccw;
160static struct ipl_parameter_block *reipl_block_nss;
161static struct ipl_parameter_block *reipl_block_actual;
162
163static int dump_capabilities = DUMP_TYPE_NONE;
164static enum dump_type dump_type = DUMP_TYPE_NONE;
165static enum dump_method dump_method = DUMP_METHOD_NONE;
166static struct ipl_parameter_block *dump_block_fcp;
167static struct ipl_parameter_block *dump_block_ccw;
168
169static struct sclp_ipl_info sclp_ipl_info;
170
171static inline int __diag308(unsigned long subcode, void *addr)
172{
173 register unsigned long _addr asm("0") = (unsigned long) addr;
174 register unsigned long _rc asm("1") = 0;
175
176 asm volatile(
177 " diag %0,%2,0x308\n"
178 "0: nopr %%r7\n"
179 EX_TABLE(0b,0b)
180 : "+d" (_addr), "+d" (_rc)
181 : "d" (subcode) : "cc", "memory");
182 return _rc;
183}
184
185int diag308(unsigned long subcode, void *addr)
186{
187 diag_stat_inc(DIAG_STAT_X308);
188 return __diag308(subcode, addr);
189}
190EXPORT_SYMBOL_GPL(diag308);
191
192
193
194#define IPL_ATTR_SHOW_FN(_prefix, _name, _format, args...) \
195static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
196 struct kobj_attribute *attr, \
197 char *page) \
198{ \
199 return snprintf(page, PAGE_SIZE, _format, ##args); \
200}
201
202#define IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk) \
203static 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 ssid, devno; \
208 \
209 if (sscanf(buf, "0.%llx.%llx\n", &ssid, &devno) != 2) \
210 return -EINVAL; \
211 \
212 if (ssid > __MAX_SSID || devno > __MAX_SUBCHANNEL) \
213 return -EINVAL; \
214 \
215 _ipl_blk.ssid = ssid; \
216 _ipl_blk.devno = devno; \
217 return len; \
218}
219
220#define DEFINE_IPL_CCW_ATTR_RW(_prefix, _name, _ipl_blk) \
221IPL_ATTR_SHOW_FN(_prefix, _name, "0.%x.%04x\n", \
222 _ipl_blk.ssid, _ipl_blk.devno); \
223IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk); \
224static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
225 __ATTR(_name, (S_IRUGO | S_IWUSR), \
226 sys_##_prefix##_##_name##_show, \
227 sys_##_prefix##_##_name##_store) \
228
229#define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
230IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value) \
231static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
232 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL)
233
234#define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
235IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value) \
236static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
237 struct kobj_attribute *attr, \
238 const char *buf, size_t len) \
239{ \
240 unsigned long long value; \
241 if (sscanf(buf, _fmt_in, &value) != 1) \
242 return -EINVAL; \
243 _value = value; \
244 return len; \
245} \
246static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
247 __ATTR(_name,(S_IRUGO | S_IWUSR), \
248 sys_##_prefix##_##_name##_show, \
249 sys_##_prefix##_##_name##_store)
250
251#define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
252IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, _value) \
253static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
254 struct kobj_attribute *attr, \
255 const char *buf, size_t len) \
256{ \
257 strncpy(_value, buf, sizeof(_value) - 1); \
258 strim(_value); \
259 return len; \
260} \
261static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
262 __ATTR(_name,(S_IRUGO | S_IWUSR), \
263 sys_##_prefix##_##_name##_show, \
264 sys_##_prefix##_##_name##_store)
265
266static void make_attrs_ro(struct attribute **attrs)
267{
268 while (*attrs) {
269 (*attrs)->mode = S_IRUGO;
270 attrs++;
271 }
272}
273
274
275
276
277
278static __init enum ipl_type get_ipl_type(void)
279{
280 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
281
282 if (ipl_flags & IPL_NSS_VALID)
283 return IPL_TYPE_NSS;
284 if (!(ipl_flags & IPL_DEVNO_VALID))
285 return IPL_TYPE_UNKNOWN;
286 if (!(ipl_flags & IPL_PARMBLOCK_VALID))
287 return IPL_TYPE_CCW;
288 if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
289 return IPL_TYPE_UNKNOWN;
290 if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
291 return IPL_TYPE_UNKNOWN;
292 if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
293 return IPL_TYPE_FCP_DUMP;
294 return IPL_TYPE_FCP;
295}
296
297struct ipl_info ipl_info;
298EXPORT_SYMBOL_GPL(ipl_info);
299
300static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
301 char *page)
302{
303 return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
304}
305
306static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
307
308
309static size_t reipl_get_ascii_vmparm(char *dest, size_t size,
310 const struct ipl_parameter_block *ipb)
311{
312 int i;
313 size_t len;
314 char has_lowercase = 0;
315
316 len = 0;
317 if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
318 (ipb->ipl_info.ccw.vm_parm_len > 0)) {
319
320 len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
321 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
322
323
324
325 for (i = 0; i < len; i++)
326 if ((dest[i] > 0x80 && dest[i] < 0x8a) ||
327 (dest[i] > 0x90 && dest[i] < 0x9a) ||
328 (dest[i] > 0xa1 && dest[i] < 0xaa)) {
329 has_lowercase = 1;
330 break;
331 }
332 if (!has_lowercase)
333 EBC_TOLOWER(dest, len);
334 EBCASC(dest, len);
335 }
336 dest[len] = 0;
337
338 return len;
339}
340
341size_t append_ipl_vmparm(char *dest, size_t size)
342{
343 size_t rc;
344
345 rc = 0;
346 if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
347 rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
348 else
349 dest[0] = 0;
350 return rc;
351}
352
353static ssize_t ipl_vm_parm_show(struct kobject *kobj,
354 struct kobj_attribute *attr, char *page)
355{
356 char parm[DIAG308_VMPARM_SIZE + 1] = {};
357
358 append_ipl_vmparm(parm, sizeof(parm));
359 return sprintf(page, "%s\n", parm);
360}
361
362static size_t scpdata_length(const char* buf, size_t count)
363{
364 while (count) {
365 if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
366 break;
367 count--;
368 }
369 return count;
370}
371
372static size_t reipl_append_ascii_scpdata(char *dest, size_t size,
373 const struct ipl_parameter_block *ipb)
374{
375 size_t count;
376 size_t i;
377 int has_lowercase;
378
379 count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data,
380 ipb->ipl_info.fcp.scp_data_len));
381 if (!count)
382 goto out;
383
384 has_lowercase = 0;
385 for (i = 0; i < count; i++) {
386 if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
387 count = 0;
388 goto out;
389 }
390 if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
391 has_lowercase = 1;
392 }
393
394 if (has_lowercase)
395 memcpy(dest, ipb->ipl_info.fcp.scp_data, count);
396 else
397 for (i = 0; i < count; i++)
398 dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]);
399out:
400 dest[count] = '\0';
401 return count;
402}
403
404size_t append_ipl_scpdata(char *dest, size_t len)
405{
406 size_t rc;
407
408 rc = 0;
409 if (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP)
410 rc = reipl_append_ascii_scpdata(dest, len, &ipl_block);
411 else
412 dest[0] = 0;
413 return rc;
414}
415
416
417static struct kobj_attribute sys_ipl_vm_parm_attr =
418 __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
419
420static ssize_t sys_ipl_device_show(struct kobject *kobj,
421 struct kobj_attribute *attr, char *page)
422{
423 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
424
425 switch (ipl_info.type) {
426 case IPL_TYPE_CCW:
427 return sprintf(page, "0.%x.%04x\n", ipl_ssid, ipl_devno);
428 case IPL_TYPE_FCP:
429 case IPL_TYPE_FCP_DUMP:
430 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
431 default:
432 return 0;
433 }
434}
435
436static struct kobj_attribute sys_ipl_device_attr =
437 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
438
439static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
440 struct bin_attribute *attr, char *buf,
441 loff_t off, size_t count)
442{
443 return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START,
444 IPL_PARMBLOCK_SIZE);
445}
446static struct bin_attribute ipl_parameter_attr =
447 __BIN_ATTR(binary_parameter, S_IRUGO, ipl_parameter_read, NULL,
448 PAGE_SIZE);
449
450static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
451 struct bin_attribute *attr, char *buf,
452 loff_t off, size_t count)
453{
454 unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
455 void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
456
457 return memory_read_from_buffer(buf, count, &off, scp_data, size);
458}
459static struct bin_attribute ipl_scp_data_attr =
460 __BIN_ATTR(scp_data, S_IRUGO, ipl_scp_data_read, NULL, PAGE_SIZE);
461
462static struct bin_attribute *ipl_fcp_bin_attrs[] = {
463 &ipl_parameter_attr,
464 &ipl_scp_data_attr,
465 NULL,
466};
467
468
469
470DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
471 IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
472DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
473 IPL_PARMBLOCK_START->ipl_info.fcp.lun);
474DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
475 IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
476DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
477 IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
478
479static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
480 struct kobj_attribute *attr, char *page)
481{
482 char loadparm[LOADPARM_LEN + 1] = {};
483
484 if (!sclp_ipl_info.is_valid)
485 return sprintf(page, "#unknown#\n");
486 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
487 EBCASC(loadparm, LOADPARM_LEN);
488 strim(loadparm);
489 return sprintf(page, "%s\n", loadparm);
490}
491
492static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
493 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
494
495static struct attribute *ipl_fcp_attrs[] = {
496 &sys_ipl_type_attr.attr,
497 &sys_ipl_device_attr.attr,
498 &sys_ipl_fcp_wwpn_attr.attr,
499 &sys_ipl_fcp_lun_attr.attr,
500 &sys_ipl_fcp_bootprog_attr.attr,
501 &sys_ipl_fcp_br_lba_attr.attr,
502 &sys_ipl_ccw_loadparm_attr.attr,
503 NULL,
504};
505
506static struct attribute_group ipl_fcp_attr_group = {
507 .attrs = ipl_fcp_attrs,
508 .bin_attrs = ipl_fcp_bin_attrs,
509};
510
511
512
513static struct attribute *ipl_ccw_attrs_vm[] = {
514 &sys_ipl_type_attr.attr,
515 &sys_ipl_device_attr.attr,
516 &sys_ipl_ccw_loadparm_attr.attr,
517 &sys_ipl_vm_parm_attr.attr,
518 NULL,
519};
520
521static struct attribute *ipl_ccw_attrs_lpar[] = {
522 &sys_ipl_type_attr.attr,
523 &sys_ipl_device_attr.attr,
524 &sys_ipl_ccw_loadparm_attr.attr,
525 NULL,
526};
527
528static struct attribute_group ipl_ccw_attr_group_vm = {
529 .attrs = ipl_ccw_attrs_vm,
530};
531
532static struct attribute_group ipl_ccw_attr_group_lpar = {
533 .attrs = ipl_ccw_attrs_lpar
534};
535
536
537
538DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
539
540static struct attribute *ipl_nss_attrs[] = {
541 &sys_ipl_type_attr.attr,
542 &sys_ipl_nss_name_attr.attr,
543 &sys_ipl_ccw_loadparm_attr.attr,
544 &sys_ipl_vm_parm_attr.attr,
545 NULL,
546};
547
548static struct attribute_group ipl_nss_attr_group = {
549 .attrs = ipl_nss_attrs,
550};
551
552
553
554static struct attribute *ipl_unknown_attrs[] = {
555 &sys_ipl_type_attr.attr,
556 NULL,
557};
558
559static struct attribute_group ipl_unknown_attr_group = {
560 .attrs = ipl_unknown_attrs,
561};
562
563static struct kset *ipl_kset;
564
565static void __ipl_run(void *unused)
566{
567 diag308(DIAG308_LOAD_CLEAR, 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
574static void ipl_run(struct shutdown_trigger *trigger)
575{
576 smp_call_ipl_cpu(__ipl_run, NULL);
577}
578
579static 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 = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
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 }
609out:
610 if (rc)
611 panic("ipl_init failed: rc = %i\n", rc);
612
613 return 0;
614}
615
616static struct shutdown_action __refdata ipl_action = {
617 .name = SHUTDOWN_ACTION_IPL_STR,
618 .fn = ipl_run,
619 .init = ipl_init,
620};
621
622
623
624
625
626
627static 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
636static 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
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
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
669static 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
675static 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
683static 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
689static 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
696static struct kobj_attribute sys_reipl_nss_vmparm_attr =
697 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
698 reipl_nss_vmparm_store);
699static 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
704
705static 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
715static 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 scpdata_len = count;
720 size_t padding;
721
722
723 if (off)
724 return -EINVAL;
725
726 memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf, count);
727 if (scpdata_len % 8) {
728 padding = 8 - (scpdata_len % 8);
729 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
730 0, padding);
731 scpdata_len += padding;
732 }
733
734 reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
735 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
736 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
737
738 return count;
739}
740static struct bin_attribute sys_reipl_fcp_scp_data_attr =
741 __BIN_ATTR(scp_data, (S_IRUGO | S_IWUSR), reipl_fcp_scpdata_read,
742 reipl_fcp_scpdata_write, DIAG308_SCPDATA_SIZE);
743
744static struct bin_attribute *reipl_fcp_bin_attrs[] = {
745 &sys_reipl_fcp_scp_data_attr,
746 NULL,
747};
748
749DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n",
750 reipl_block_fcp->ipl_info.fcp.wwpn);
751DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n",
752 reipl_block_fcp->ipl_info.fcp.lun);
753DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
754 reipl_block_fcp->ipl_info.fcp.bootprog);
755DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
756 reipl_block_fcp->ipl_info.fcp.br_lba);
757DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
758 reipl_block_fcp->ipl_info.fcp.devno);
759
760static void reipl_get_ascii_loadparm(char *loadparm,
761 struct ipl_parameter_block *ibp)
762{
763 memcpy(loadparm, ibp->hdr.loadparm, LOADPARM_LEN);
764 EBCASC(loadparm, LOADPARM_LEN);
765 loadparm[LOADPARM_LEN] = 0;
766 strim(loadparm);
767}
768
769static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
770 char *page)
771{
772 char buf[LOADPARM_LEN + 1];
773
774 reipl_get_ascii_loadparm(buf, ipb);
775 return sprintf(page, "%s\n", buf);
776}
777
778static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
779 const char *buf, size_t len)
780{
781 int i, lp_len;
782
783
784 lp_len = len;
785 if ((len > 0) && (buf[len - 1] == '\n'))
786 lp_len--;
787
788 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
789 return -EINVAL;
790
791 for (i = 0; i < lp_len; i++) {
792 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
793 (buf[i] == '.'))
794 continue;
795 return -EINVAL;
796 }
797
798 memset(ipb->hdr.loadparm, ' ', LOADPARM_LEN);
799
800 memcpy(ipb->hdr.loadparm, buf, lp_len);
801 ASCEBC(ipb->hdr.loadparm, LOADPARM_LEN);
802 return len;
803}
804
805
806static ssize_t reipl_fcp_loadparm_show(struct kobject *kobj,
807 struct kobj_attribute *attr, char *page)
808{
809 return reipl_generic_loadparm_show(reipl_block_fcp, page);
810}
811
812static ssize_t reipl_fcp_loadparm_store(struct kobject *kobj,
813 struct kobj_attribute *attr,
814 const char *buf, size_t len)
815{
816 return reipl_generic_loadparm_store(reipl_block_fcp, buf, len);
817}
818
819static struct kobj_attribute sys_reipl_fcp_loadparm_attr =
820 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_fcp_loadparm_show,
821 reipl_fcp_loadparm_store);
822
823static struct attribute *reipl_fcp_attrs[] = {
824 &sys_reipl_fcp_device_attr.attr,
825 &sys_reipl_fcp_wwpn_attr.attr,
826 &sys_reipl_fcp_lun_attr.attr,
827 &sys_reipl_fcp_bootprog_attr.attr,
828 &sys_reipl_fcp_br_lba_attr.attr,
829 &sys_reipl_fcp_loadparm_attr.attr,
830 NULL,
831};
832
833static struct attribute_group reipl_fcp_attr_group = {
834 .attrs = reipl_fcp_attrs,
835 .bin_attrs = reipl_fcp_bin_attrs,
836};
837
838
839DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ipl_info.ccw);
840
841
842static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
843 struct kobj_attribute *attr, char *page)
844{
845 return reipl_generic_loadparm_show(reipl_block_nss, page);
846}
847
848static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
849 struct kobj_attribute *attr,
850 const char *buf, size_t len)
851{
852 return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
853}
854
855
856static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
857 struct kobj_attribute *attr, char *page)
858{
859 return reipl_generic_loadparm_show(reipl_block_ccw, page);
860}
861
862static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
863 struct kobj_attribute *attr,
864 const char *buf, size_t len)
865{
866 return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
867}
868
869static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
870 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
871 reipl_ccw_loadparm_store);
872
873static struct attribute *reipl_ccw_attrs_vm[] = {
874 &sys_reipl_ccw_device_attr.attr,
875 &sys_reipl_ccw_loadparm_attr.attr,
876 &sys_reipl_ccw_vmparm_attr.attr,
877 NULL,
878};
879
880static struct attribute *reipl_ccw_attrs_lpar[] = {
881 &sys_reipl_ccw_device_attr.attr,
882 &sys_reipl_ccw_loadparm_attr.attr,
883 NULL,
884};
885
886static struct attribute_group reipl_ccw_attr_group_vm = {
887 .name = IPL_CCW_STR,
888 .attrs = reipl_ccw_attrs_vm,
889};
890
891static struct attribute_group reipl_ccw_attr_group_lpar = {
892 .name = IPL_CCW_STR,
893 .attrs = reipl_ccw_attrs_lpar,
894};
895
896
897
898static void reipl_get_ascii_nss_name(char *dst,
899 struct ipl_parameter_block *ipb)
900{
901 memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
902 EBCASC(dst, NSS_NAME_SIZE);
903 dst[NSS_NAME_SIZE] = 0;
904}
905
906static ssize_t reipl_nss_name_show(struct kobject *kobj,
907 struct kobj_attribute *attr, char *page)
908{
909 char nss_name[NSS_NAME_SIZE + 1] = {};
910
911 reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
912 return sprintf(page, "%s\n", nss_name);
913}
914
915static ssize_t reipl_nss_name_store(struct kobject *kobj,
916 struct kobj_attribute *attr,
917 const char *buf, size_t len)
918{
919 int nss_len;
920
921
922 nss_len = len;
923 if ((len > 0) && (buf[len - 1] == '\n'))
924 nss_len--;
925
926 if (nss_len > NSS_NAME_SIZE)
927 return -EINVAL;
928
929 memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
930 if (nss_len > 0) {
931 reipl_block_nss->ipl_info.ccw.vm_flags |=
932 DIAG308_VM_FLAGS_NSS_VALID;
933 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
934 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
935 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
936 } else {
937 reipl_block_nss->ipl_info.ccw.vm_flags &=
938 ~DIAG308_VM_FLAGS_NSS_VALID;
939 }
940
941 return len;
942}
943
944static struct kobj_attribute sys_reipl_nss_name_attr =
945 __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
946 reipl_nss_name_store);
947
948static struct kobj_attribute sys_reipl_nss_loadparm_attr =
949 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
950 reipl_nss_loadparm_store);
951
952static struct attribute *reipl_nss_attrs[] = {
953 &sys_reipl_nss_name_attr.attr,
954 &sys_reipl_nss_loadparm_attr.attr,
955 &sys_reipl_nss_vmparm_attr.attr,
956 NULL,
957};
958
959static struct attribute_group reipl_nss_attr_group = {
960 .name = IPL_NSS_STR,
961 .attrs = reipl_nss_attrs,
962};
963
964static void set_reipl_block_actual(struct ipl_parameter_block *reipl_block)
965{
966 reipl_block_actual = reipl_block;
967 os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual,
968 reipl_block->hdr.len);
969}
970
971
972
973static int reipl_set_type(enum ipl_type type)
974{
975 if (!(reipl_capabilities & type))
976 return -EINVAL;
977
978 switch(type) {
979 case IPL_TYPE_CCW:
980 if (diag308_set_works)
981 reipl_method = REIPL_METHOD_CCW_DIAG;
982 else if (MACHINE_IS_VM)
983 reipl_method = REIPL_METHOD_CCW_VM;
984 else
985 reipl_method = REIPL_METHOD_CCW_CIO;
986 set_reipl_block_actual(reipl_block_ccw);
987 break;
988 case IPL_TYPE_FCP:
989 if (diag308_set_works)
990 reipl_method = REIPL_METHOD_FCP_RW_DIAG;
991 else if (MACHINE_IS_VM)
992 reipl_method = REIPL_METHOD_FCP_RO_VM;
993 else
994 reipl_method = REIPL_METHOD_FCP_RO_DIAG;
995 set_reipl_block_actual(reipl_block_fcp);
996 break;
997 case IPL_TYPE_FCP_DUMP:
998 reipl_method = REIPL_METHOD_FCP_DUMP;
999 break;
1000 case IPL_TYPE_NSS:
1001 if (diag308_set_works)
1002 reipl_method = REIPL_METHOD_NSS_DIAG;
1003 else
1004 reipl_method = REIPL_METHOD_NSS;
1005 set_reipl_block_actual(reipl_block_nss);
1006 break;
1007 case IPL_TYPE_UNKNOWN:
1008 reipl_method = REIPL_METHOD_DEFAULT;
1009 break;
1010 default:
1011 BUG();
1012 }
1013 reipl_type = type;
1014 return 0;
1015}
1016
1017static ssize_t reipl_type_show(struct kobject *kobj,
1018 struct kobj_attribute *attr, char *page)
1019{
1020 return sprintf(page, "%s\n", ipl_type_str(reipl_type));
1021}
1022
1023static ssize_t reipl_type_store(struct kobject *kobj,
1024 struct kobj_attribute *attr,
1025 const char *buf, size_t len)
1026{
1027 int rc = -EINVAL;
1028
1029 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1030 rc = reipl_set_type(IPL_TYPE_CCW);
1031 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1032 rc = reipl_set_type(IPL_TYPE_FCP);
1033 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1034 rc = reipl_set_type(IPL_TYPE_NSS);
1035 return (rc != 0) ? rc : len;
1036}
1037
1038static struct kobj_attribute reipl_type_attr =
1039 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
1040
1041static struct kset *reipl_kset;
1042static struct kset *reipl_fcp_kset;
1043
1044static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
1045 const enum ipl_method m)
1046{
1047 char loadparm[LOADPARM_LEN + 1] = {};
1048 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
1049 char nss_name[NSS_NAME_SIZE + 1] = {};
1050 size_t pos = 0;
1051
1052 reipl_get_ascii_loadparm(loadparm, ipb);
1053 reipl_get_ascii_nss_name(nss_name, ipb);
1054 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
1055
1056 switch (m) {
1057 case REIPL_METHOD_CCW_VM:
1058 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
1059 break;
1060 case REIPL_METHOD_NSS:
1061 pos = sprintf(dst, "IPL %s", nss_name);
1062 break;
1063 default:
1064 break;
1065 }
1066 if (strlen(loadparm) > 0)
1067 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
1068 if (strlen(vmparm) > 0)
1069 sprintf(dst + pos, " PARM %s", vmparm);
1070}
1071
1072static void __reipl_run(void *unused)
1073{
1074 struct ccw_dev_id devid;
1075 static char buf[128];
1076
1077 switch (reipl_method) {
1078 case REIPL_METHOD_CCW_CIO:
1079 devid.ssid = reipl_block_ccw->ipl_info.ccw.ssid;
1080 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
1081 reipl_ccw_dev(&devid);
1082 break;
1083 case REIPL_METHOD_CCW_VM:
1084 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
1085 __cpcmd(buf, NULL, 0, NULL);
1086 break;
1087 case REIPL_METHOD_CCW_DIAG:
1088 diag308(DIAG308_SET, reipl_block_ccw);
1089 diag308(DIAG308_LOAD_CLEAR, NULL);
1090 break;
1091 case REIPL_METHOD_FCP_RW_DIAG:
1092 diag308(DIAG308_SET, reipl_block_fcp);
1093 diag308(DIAG308_LOAD_CLEAR, NULL);
1094 break;
1095 case REIPL_METHOD_FCP_RO_DIAG:
1096 diag308(DIAG308_LOAD_CLEAR, NULL);
1097 break;
1098 case REIPL_METHOD_FCP_RO_VM:
1099 __cpcmd("IPL", NULL, 0, NULL);
1100 break;
1101 case REIPL_METHOD_NSS_DIAG:
1102 diag308(DIAG308_SET, reipl_block_nss);
1103 diag308(DIAG308_LOAD_CLEAR, NULL);
1104 break;
1105 case REIPL_METHOD_NSS:
1106 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
1107 __cpcmd(buf, NULL, 0, NULL);
1108 break;
1109 case REIPL_METHOD_DEFAULT:
1110 if (MACHINE_IS_VM)
1111 __cpcmd("IPL", NULL, 0, NULL);
1112 diag308(DIAG308_LOAD_CLEAR, NULL);
1113 break;
1114 case REIPL_METHOD_FCP_DUMP:
1115 break;
1116 }
1117 disabled_wait((unsigned long) __builtin_return_address(0));
1118}
1119
1120static void reipl_run(struct shutdown_trigger *trigger)
1121{
1122 smp_call_ipl_cpu(__reipl_run, NULL);
1123}
1124
1125static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
1126{
1127 ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
1128 ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1129 ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1130 ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1131}
1132
1133static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1134{
1135
1136
1137 if (sclp_ipl_info.is_valid)
1138 memcpy(ipb->hdr.loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
1139 else
1140
1141 memset(ipb->hdr.loadparm, 0x40, LOADPARM_LEN);
1142 ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
1143
1144
1145 if (MACHINE_IS_VM && diag308_set_works &&
1146 (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1147
1148 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1149 ipb->ipl_info.ccw.vm_parm_len =
1150 ipl_block.ipl_info.ccw.vm_parm_len;
1151 memcpy(ipb->ipl_info.ccw.vm_parm,
1152 ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1153 }
1154}
1155
1156static int __init reipl_nss_init(void)
1157{
1158 int rc;
1159
1160 if (!MACHINE_IS_VM)
1161 return 0;
1162
1163 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1164 if (!reipl_block_nss)
1165 return -ENOMEM;
1166
1167 if (!diag308_set_works)
1168 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO;
1169
1170 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1171 if (rc)
1172 return rc;
1173
1174 reipl_block_ccw_init(reipl_block_nss);
1175 if (ipl_info.type == IPL_TYPE_NSS) {
1176 memset(reipl_block_nss->ipl_info.ccw.nss_name,
1177 ' ', NSS_NAME_SIZE);
1178 memcpy(reipl_block_nss->ipl_info.ccw.nss_name,
1179 kernel_nss_name, strlen(kernel_nss_name));
1180 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
1181 reipl_block_nss->ipl_info.ccw.vm_flags |=
1182 DIAG308_VM_FLAGS_NSS_VALID;
1183
1184 reipl_block_ccw_fill_parms(reipl_block_nss);
1185 }
1186
1187 reipl_capabilities |= IPL_TYPE_NSS;
1188 return 0;
1189}
1190
1191static int __init reipl_ccw_init(void)
1192{
1193 int rc;
1194
1195 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1196 if (!reipl_block_ccw)
1197 return -ENOMEM;
1198
1199 if (MACHINE_IS_VM) {
1200 if (!diag308_set_works)
1201 sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
1202 rc = sysfs_create_group(&reipl_kset->kobj,
1203 &reipl_ccw_attr_group_vm);
1204 } else {
1205 if(!diag308_set_works)
1206 sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
1207 rc = sysfs_create_group(&reipl_kset->kobj,
1208 &reipl_ccw_attr_group_lpar);
1209 }
1210 if (rc)
1211 return rc;
1212
1213 reipl_block_ccw_init(reipl_block_ccw);
1214 if (ipl_info.type == IPL_TYPE_CCW) {
1215 reipl_block_ccw->ipl_info.ccw.ssid = ipl_ssid;
1216 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
1217 reipl_block_ccw_fill_parms(reipl_block_ccw);
1218 }
1219
1220 reipl_capabilities |= IPL_TYPE_CCW;
1221 return 0;
1222}
1223
1224static int __init reipl_fcp_init(void)
1225{
1226 int rc;
1227
1228 if (!diag308_set_works) {
1229 if (ipl_info.type == IPL_TYPE_FCP) {
1230 make_attrs_ro(reipl_fcp_attrs);
1231 sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO;
1232 } else
1233 return 0;
1234 }
1235
1236 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1237 if (!reipl_block_fcp)
1238 return -ENOMEM;
1239
1240
1241 reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1242 &reipl_kset->kobj);
1243 if (!reipl_fcp_kset) {
1244 free_page((unsigned long) reipl_block_fcp);
1245 return -ENOMEM;
1246 }
1247
1248 rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1249 if (rc) {
1250 kset_unregister(reipl_fcp_kset);
1251 free_page((unsigned long) reipl_block_fcp);
1252 return rc;
1253 }
1254
1255 if (ipl_info.type == IPL_TYPE_FCP) {
1256 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
1257
1258
1259
1260
1261
1262 memcpy(reipl_block_fcp->hdr.loadparm, sclp_ipl_info.loadparm,
1263 LOADPARM_LEN);
1264 } else {
1265 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1266 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1267 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1268 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1269 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1270 }
1271 reipl_capabilities |= IPL_TYPE_FCP;
1272 return 0;
1273}
1274
1275static int __init reipl_type_init(void)
1276{
1277 enum ipl_type reipl_type = ipl_info.type;
1278 struct ipl_parameter_block *reipl_block;
1279 unsigned long size;
1280
1281 reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size);
1282 if (!reipl_block)
1283 goto out;
1284
1285
1286
1287 if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_FCP) {
1288 memcpy(reipl_block_fcp, reipl_block, size);
1289 reipl_type = IPL_TYPE_FCP;
1290 } else if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_CCW) {
1291 memcpy(reipl_block_ccw, reipl_block, size);
1292 reipl_type = IPL_TYPE_CCW;
1293 }
1294out:
1295 return reipl_set_type(reipl_type);
1296}
1297
1298static int __init reipl_init(void)
1299{
1300 int rc;
1301
1302 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1303 if (!reipl_kset)
1304 return -ENOMEM;
1305 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1306 if (rc) {
1307 kset_unregister(reipl_kset);
1308 return rc;
1309 }
1310 rc = reipl_ccw_init();
1311 if (rc)
1312 return rc;
1313 rc = reipl_fcp_init();
1314 if (rc)
1315 return rc;
1316 rc = reipl_nss_init();
1317 if (rc)
1318 return rc;
1319 return reipl_type_init();
1320}
1321
1322static struct shutdown_action __refdata reipl_action = {
1323 .name = SHUTDOWN_ACTION_REIPL_STR,
1324 .fn = reipl_run,
1325 .init = reipl_init,
1326};
1327
1328
1329
1330
1331
1332
1333
1334DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n",
1335 dump_block_fcp->ipl_info.fcp.wwpn);
1336DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n",
1337 dump_block_fcp->ipl_info.fcp.lun);
1338DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1339 dump_block_fcp->ipl_info.fcp.bootprog);
1340DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1341 dump_block_fcp->ipl_info.fcp.br_lba);
1342DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1343 dump_block_fcp->ipl_info.fcp.devno);
1344
1345static struct attribute *dump_fcp_attrs[] = {
1346 &sys_dump_fcp_device_attr.attr,
1347 &sys_dump_fcp_wwpn_attr.attr,
1348 &sys_dump_fcp_lun_attr.attr,
1349 &sys_dump_fcp_bootprog_attr.attr,
1350 &sys_dump_fcp_br_lba_attr.attr,
1351 NULL,
1352};
1353
1354static struct attribute_group dump_fcp_attr_group = {
1355 .name = IPL_FCP_STR,
1356 .attrs = dump_fcp_attrs,
1357};
1358
1359
1360DEFINE_IPL_CCW_ATTR_RW(dump_ccw, device, dump_block_ccw->ipl_info.ccw);
1361
1362static struct attribute *dump_ccw_attrs[] = {
1363 &sys_dump_ccw_device_attr.attr,
1364 NULL,
1365};
1366
1367static struct attribute_group dump_ccw_attr_group = {
1368 .name = IPL_CCW_STR,
1369 .attrs = dump_ccw_attrs,
1370};
1371
1372
1373
1374static int dump_set_type(enum dump_type type)
1375{
1376 if (!(dump_capabilities & type))
1377 return -EINVAL;
1378 switch (type) {
1379 case DUMP_TYPE_CCW:
1380 if (diag308_set_works)
1381 dump_method = DUMP_METHOD_CCW_DIAG;
1382 else if (MACHINE_IS_VM)
1383 dump_method = DUMP_METHOD_CCW_VM;
1384 else
1385 dump_method = DUMP_METHOD_CCW_CIO;
1386 break;
1387 case DUMP_TYPE_FCP:
1388 dump_method = DUMP_METHOD_FCP_DIAG;
1389 break;
1390 default:
1391 dump_method = DUMP_METHOD_NONE;
1392 }
1393 dump_type = type;
1394 return 0;
1395}
1396
1397static ssize_t dump_type_show(struct kobject *kobj,
1398 struct kobj_attribute *attr, char *page)
1399{
1400 return sprintf(page, "%s\n", dump_type_str(dump_type));
1401}
1402
1403static ssize_t dump_type_store(struct kobject *kobj,
1404 struct kobj_attribute *attr,
1405 const char *buf, size_t len)
1406{
1407 int rc = -EINVAL;
1408
1409 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1410 rc = dump_set_type(DUMP_TYPE_NONE);
1411 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1412 rc = dump_set_type(DUMP_TYPE_CCW);
1413 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1414 rc = dump_set_type(DUMP_TYPE_FCP);
1415 return (rc != 0) ? rc : len;
1416}
1417
1418static struct kobj_attribute dump_type_attr =
1419 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1420
1421static struct kset *dump_kset;
1422
1423static void diag308_dump(void *dump_block)
1424{
1425 diag308(DIAG308_SET, dump_block);
1426 while (1) {
1427 if (diag308(DIAG308_LOAD_NORMAL_DUMP, NULL) != 0x302)
1428 break;
1429 udelay_simple(USEC_PER_SEC);
1430 }
1431}
1432
1433static void __dump_run(void *unused)
1434{
1435 struct ccw_dev_id devid;
1436 static char buf[100];
1437
1438 switch (dump_method) {
1439 case DUMP_METHOD_CCW_CIO:
1440 devid.ssid = dump_block_ccw->ipl_info.ccw.ssid;
1441 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
1442 reipl_ccw_dev(&devid);
1443 break;
1444 case DUMP_METHOD_CCW_VM:
1445 sprintf(buf, "STORE STATUS");
1446 __cpcmd(buf, NULL, 0, NULL);
1447 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
1448 __cpcmd(buf, NULL, 0, NULL);
1449 break;
1450 case DUMP_METHOD_CCW_DIAG:
1451 diag308_dump(dump_block_ccw);
1452 break;
1453 case DUMP_METHOD_FCP_DIAG:
1454 diag308_dump(dump_block_fcp);
1455 break;
1456 default:
1457 break;
1458 }
1459}
1460
1461static void dump_run(struct shutdown_trigger *trigger)
1462{
1463 if (dump_method == DUMP_METHOD_NONE)
1464 return;
1465 smp_send_stop();
1466 smp_call_ipl_cpu(__dump_run, NULL);
1467}
1468
1469static int __init dump_ccw_init(void)
1470{
1471 int rc;
1472
1473 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1474 if (!dump_block_ccw)
1475 return -ENOMEM;
1476 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1477 if (rc) {
1478 free_page((unsigned long)dump_block_ccw);
1479 return rc;
1480 }
1481 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1482 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1483 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1484 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1485 dump_capabilities |= DUMP_TYPE_CCW;
1486 return 0;
1487}
1488
1489static int __init dump_fcp_init(void)
1490{
1491 int rc;
1492
1493 if (!sclp_ipl_info.has_dump)
1494 return 0;
1495 if (!diag308_set_works)
1496 return 0;
1497 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1498 if (!dump_block_fcp)
1499 return -ENOMEM;
1500 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1501 if (rc) {
1502 free_page((unsigned long)dump_block_fcp);
1503 return rc;
1504 }
1505 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1506 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1507 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1508 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1509 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1510 dump_capabilities |= DUMP_TYPE_FCP;
1511 return 0;
1512}
1513
1514static int __init dump_init(void)
1515{
1516 int rc;
1517
1518 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1519 if (!dump_kset)
1520 return -ENOMEM;
1521 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1522 if (rc) {
1523 kset_unregister(dump_kset);
1524 return rc;
1525 }
1526 rc = dump_ccw_init();
1527 if (rc)
1528 return rc;
1529 rc = dump_fcp_init();
1530 if (rc)
1531 return rc;
1532 dump_set_type(DUMP_TYPE_NONE);
1533 return 0;
1534}
1535
1536static struct shutdown_action __refdata dump_action = {
1537 .name = SHUTDOWN_ACTION_DUMP_STR,
1538 .fn = dump_run,
1539 .init = dump_init,
1540};
1541
1542static void dump_reipl_run(struct shutdown_trigger *trigger)
1543{
1544 unsigned long ipib = (unsigned long) reipl_block_actual;
1545 unsigned int csum;
1546
1547 csum = (__force unsigned int)
1548 csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
1549 mem_assign_absolute(S390_lowcore.ipib, ipib);
1550 mem_assign_absolute(S390_lowcore.ipib_checksum, csum);
1551 dump_run(trigger);
1552}
1553
1554static int __init dump_reipl_init(void)
1555{
1556 if (!diag308_set_works)
1557 return -EOPNOTSUPP;
1558 else
1559 return 0;
1560}
1561
1562static struct shutdown_action __refdata dump_reipl_action = {
1563 .name = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1564 .fn = dump_reipl_run,
1565 .init = dump_reipl_init,
1566};
1567
1568
1569
1570
1571
1572static char vmcmd_on_reboot[128];
1573static char vmcmd_on_panic[128];
1574static char vmcmd_on_halt[128];
1575static char vmcmd_on_poff[128];
1576static char vmcmd_on_restart[128];
1577
1578DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1579DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1580DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1581DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1582DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1583
1584static struct attribute *vmcmd_attrs[] = {
1585 &sys_vmcmd_on_reboot_attr.attr,
1586 &sys_vmcmd_on_panic_attr.attr,
1587 &sys_vmcmd_on_halt_attr.attr,
1588 &sys_vmcmd_on_poff_attr.attr,
1589 &sys_vmcmd_on_restart_attr.attr,
1590 NULL,
1591};
1592
1593static struct attribute_group vmcmd_attr_group = {
1594 .attrs = vmcmd_attrs,
1595};
1596
1597static struct kset *vmcmd_kset;
1598
1599static void vmcmd_run(struct shutdown_trigger *trigger)
1600{
1601 char *cmd;
1602
1603 if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1604 cmd = vmcmd_on_reboot;
1605 else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1606 cmd = vmcmd_on_panic;
1607 else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1608 cmd = vmcmd_on_halt;
1609 else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1610 cmd = vmcmd_on_poff;
1611 else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
1612 cmd = vmcmd_on_restart;
1613 else
1614 return;
1615
1616 if (strlen(cmd) == 0)
1617 return;
1618 __cpcmd(cmd, NULL, 0, NULL);
1619}
1620
1621static int vmcmd_init(void)
1622{
1623 if (!MACHINE_IS_VM)
1624 return -EOPNOTSUPP;
1625 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1626 if (!vmcmd_kset)
1627 return -ENOMEM;
1628 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1629}
1630
1631static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1632 vmcmd_run, vmcmd_init};
1633
1634
1635
1636
1637
1638static void stop_run(struct shutdown_trigger *trigger)
1639{
1640 if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
1641 strcmp(trigger->name, ON_RESTART_STR) == 0)
1642 disabled_wait((unsigned long) __builtin_return_address(0));
1643 smp_stop_cpu();
1644}
1645
1646static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1647 stop_run, NULL};
1648
1649
1650
1651static struct shutdown_action *shutdown_actions_list[] = {
1652 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1653 &vmcmd_action, &stop_action};
1654#define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1655
1656
1657
1658
1659
1660static struct kset *shutdown_actions_kset;
1661
1662static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1663 size_t len)
1664{
1665 int i;
1666
1667 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1668 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1669 if (shutdown_actions_list[i]->init_rc) {
1670 return shutdown_actions_list[i]->init_rc;
1671 } else {
1672 trigger->action = shutdown_actions_list[i];
1673 return len;
1674 }
1675 }
1676 }
1677 return -EINVAL;
1678}
1679
1680
1681
1682static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1683 &reipl_action};
1684
1685static ssize_t on_reboot_show(struct kobject *kobj,
1686 struct kobj_attribute *attr, char *page)
1687{
1688 return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1689}
1690
1691static ssize_t on_reboot_store(struct kobject *kobj,
1692 struct kobj_attribute *attr,
1693 const char *buf, size_t len)
1694{
1695 return set_trigger(buf, &on_reboot_trigger, len);
1696}
1697static struct kobj_attribute on_reboot_attr = __ATTR_RW(on_reboot);
1698
1699static void do_machine_restart(char *__unused)
1700{
1701 smp_send_stop();
1702 on_reboot_trigger.action->fn(&on_reboot_trigger);
1703 reipl_run(NULL);
1704}
1705void (*_machine_restart)(char *command) = do_machine_restart;
1706
1707
1708
1709static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1710
1711static ssize_t on_panic_show(struct kobject *kobj,
1712 struct kobj_attribute *attr, char *page)
1713{
1714 return sprintf(page, "%s\n", on_panic_trigger.action->name);
1715}
1716
1717static ssize_t on_panic_store(struct kobject *kobj,
1718 struct kobj_attribute *attr,
1719 const char *buf, size_t len)
1720{
1721 return set_trigger(buf, &on_panic_trigger, len);
1722}
1723static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic);
1724
1725static void do_panic(void)
1726{
1727 lgr_info_log();
1728 on_panic_trigger.action->fn(&on_panic_trigger);
1729 stop_run(&on_panic_trigger);
1730}
1731
1732
1733
1734static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
1735 &stop_action};
1736
1737static ssize_t on_restart_show(struct kobject *kobj,
1738 struct kobj_attribute *attr, char *page)
1739{
1740 return sprintf(page, "%s\n", on_restart_trigger.action->name);
1741}
1742
1743static ssize_t on_restart_store(struct kobject *kobj,
1744 struct kobj_attribute *attr,
1745 const char *buf, size_t len)
1746{
1747 return set_trigger(buf, &on_restart_trigger, len);
1748}
1749static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart);
1750
1751static void __do_restart(void *ignore)
1752{
1753 __arch_local_irq_stosm(0x04);
1754 smp_send_stop();
1755#ifdef CONFIG_CRASH_DUMP
1756 crash_kexec(NULL);
1757#endif
1758 on_restart_trigger.action->fn(&on_restart_trigger);
1759 stop_run(&on_restart_trigger);
1760}
1761
1762void do_restart(void)
1763{
1764 tracing_off();
1765 debug_locks_off();
1766 lgr_info_log();
1767 smp_call_online_cpu(__do_restart, NULL);
1768}
1769
1770
1771
1772static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1773
1774static ssize_t on_halt_show(struct kobject *kobj,
1775 struct kobj_attribute *attr, char *page)
1776{
1777 return sprintf(page, "%s\n", on_halt_trigger.action->name);
1778}
1779
1780static ssize_t on_halt_store(struct kobject *kobj,
1781 struct kobj_attribute *attr,
1782 const char *buf, size_t len)
1783{
1784 return set_trigger(buf, &on_halt_trigger, len);
1785}
1786static struct kobj_attribute on_halt_attr = __ATTR_RW(on_halt);
1787
1788static void do_machine_halt(void)
1789{
1790 smp_send_stop();
1791 on_halt_trigger.action->fn(&on_halt_trigger);
1792 stop_run(&on_halt_trigger);
1793}
1794void (*_machine_halt)(void) = do_machine_halt;
1795
1796
1797
1798static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1799
1800static ssize_t on_poff_show(struct kobject *kobj,
1801 struct kobj_attribute *attr, char *page)
1802{
1803 return sprintf(page, "%s\n", on_poff_trigger.action->name);
1804}
1805
1806static ssize_t on_poff_store(struct kobject *kobj,
1807 struct kobj_attribute *attr,
1808 const char *buf, size_t len)
1809{
1810 return set_trigger(buf, &on_poff_trigger, len);
1811}
1812static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff);
1813
1814static void do_machine_power_off(void)
1815{
1816 smp_send_stop();
1817 on_poff_trigger.action->fn(&on_poff_trigger);
1818 stop_run(&on_poff_trigger);
1819}
1820void (*_machine_power_off)(void) = do_machine_power_off;
1821
1822static struct attribute *shutdown_action_attrs[] = {
1823 &on_restart_attr.attr,
1824 &on_reboot_attr.attr,
1825 &on_panic_attr.attr,
1826 &on_halt_attr.attr,
1827 &on_poff_attr.attr,
1828 NULL,
1829};
1830
1831static struct attribute_group shutdown_action_attr_group = {
1832 .attrs = shutdown_action_attrs,
1833};
1834
1835static void __init shutdown_triggers_init(void)
1836{
1837 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1838 firmware_kobj);
1839 if (!shutdown_actions_kset)
1840 goto fail;
1841 if (sysfs_create_group(&shutdown_actions_kset->kobj,
1842 &shutdown_action_attr_group))
1843 goto fail;
1844 return;
1845fail:
1846 panic("shutdown_triggers_init failed\n");
1847}
1848
1849static void __init shutdown_actions_init(void)
1850{
1851 int i;
1852
1853 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1854 if (!shutdown_actions_list[i]->init)
1855 continue;
1856 shutdown_actions_list[i]->init_rc =
1857 shutdown_actions_list[i]->init();
1858 }
1859}
1860
1861static int __init s390_ipl_init(void)
1862{
1863 char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40};
1864
1865 sclp_early_get_ipl_info(&sclp_ipl_info);
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876 if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 &&
1877 diag308_set_works)
1878 memcpy(sclp_ipl_info.loadparm, ipl_block.hdr.loadparm,
1879 LOADPARM_LEN);
1880 shutdown_actions_init();
1881 shutdown_triggers_init();
1882 return 0;
1883}
1884
1885__initcall(s390_ipl_init);
1886
1887static void __init strncpy_skip_quote(char *dst, char *src, int n)
1888{
1889 int sx, dx;
1890
1891 dx = 0;
1892 for (sx = 0; src[sx] != 0; sx++) {
1893 if (src[sx] == '"')
1894 continue;
1895 dst[dx++] = src[sx];
1896 if (dx >= n)
1897 break;
1898 }
1899}
1900
1901static int __init vmcmd_on_reboot_setup(char *str)
1902{
1903 if (!MACHINE_IS_VM)
1904 return 1;
1905 strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1906 vmcmd_on_reboot[127] = 0;
1907 on_reboot_trigger.action = &vmcmd_action;
1908 return 1;
1909}
1910__setup("vmreboot=", vmcmd_on_reboot_setup);
1911
1912static int __init vmcmd_on_panic_setup(char *str)
1913{
1914 if (!MACHINE_IS_VM)
1915 return 1;
1916 strncpy_skip_quote(vmcmd_on_panic, str, 127);
1917 vmcmd_on_panic[127] = 0;
1918 on_panic_trigger.action = &vmcmd_action;
1919 return 1;
1920}
1921__setup("vmpanic=", vmcmd_on_panic_setup);
1922
1923static int __init vmcmd_on_halt_setup(char *str)
1924{
1925 if (!MACHINE_IS_VM)
1926 return 1;
1927 strncpy_skip_quote(vmcmd_on_halt, str, 127);
1928 vmcmd_on_halt[127] = 0;
1929 on_halt_trigger.action = &vmcmd_action;
1930 return 1;
1931}
1932__setup("vmhalt=", vmcmd_on_halt_setup);
1933
1934static int __init vmcmd_on_poff_setup(char *str)
1935{
1936 if (!MACHINE_IS_VM)
1937 return 1;
1938 strncpy_skip_quote(vmcmd_on_poff, str, 127);
1939 vmcmd_on_poff[127] = 0;
1940 on_poff_trigger.action = &vmcmd_action;
1941 return 1;
1942}
1943__setup("vmpoff=", vmcmd_on_poff_setup);
1944
1945static int on_panic_notify(struct notifier_block *self,
1946 unsigned long event, void *data)
1947{
1948 do_panic();
1949 return NOTIFY_OK;
1950}
1951
1952static struct notifier_block on_panic_nb = {
1953 .notifier_call = on_panic_notify,
1954 .priority = INT_MIN,
1955};
1956
1957void __init setup_ipl(void)
1958{
1959 ipl_info.type = get_ipl_type();
1960 switch (ipl_info.type) {
1961 case IPL_TYPE_CCW:
1962 ipl_info.data.ccw.dev_id.ssid = ipl_ssid;
1963 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1964 break;
1965 case IPL_TYPE_FCP:
1966 case IPL_TYPE_FCP_DUMP:
1967 ipl_info.data.fcp.dev_id.ssid = 0;
1968 ipl_info.data.fcp.dev_id.devno =
1969 IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1970 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1971 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1972 break;
1973 case IPL_TYPE_NSS:
1974 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1975 sizeof(ipl_info.data.nss.name));
1976 break;
1977 case IPL_TYPE_UNKNOWN:
1978
1979 break;
1980 }
1981 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1982}
1983
1984void __init ipl_update_parameters(void)
1985{
1986 int rc;
1987
1988 rc = diag308(DIAG308_STORE, &ipl_block);
1989 if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
1990 diag308_set_works = 1;
1991}
1992
1993void __init ipl_verify_parameters(void)
1994{
1995 struct cio_iplinfo iplinfo;
1996
1997 if (cio_get_iplinfo(&iplinfo))
1998 return;
1999
2000 ipl_ssid = iplinfo.ssid;
2001 ipl_devno = iplinfo.devno;
2002 ipl_flags |= IPL_DEVNO_VALID;
2003 if (!iplinfo.is_qdio)
2004 return;
2005 ipl_flags |= IPL_PARMBLOCK_VALID;
2006}
2007
2008static LIST_HEAD(rcall);
2009static DEFINE_MUTEX(rcall_mutex);
2010
2011void register_reset_call(struct reset_call *reset)
2012{
2013 mutex_lock(&rcall_mutex);
2014 list_add(&reset->list, &rcall);
2015 mutex_unlock(&rcall_mutex);
2016}
2017EXPORT_SYMBOL_GPL(register_reset_call);
2018
2019void unregister_reset_call(struct reset_call *reset)
2020{
2021 mutex_lock(&rcall_mutex);
2022 list_del(&reset->list);
2023 mutex_unlock(&rcall_mutex);
2024}
2025EXPORT_SYMBOL_GPL(unregister_reset_call);
2026
2027static void do_reset_calls(void)
2028{
2029 struct reset_call *reset;
2030
2031 if (diag308_set_works) {
2032 diag308_reset();
2033 return;
2034 }
2035 list_for_each_entry(reset, &rcall, list)
2036 reset->fn();
2037}
2038
2039void s390_reset_system(void)
2040{
2041 struct lowcore *lc;
2042
2043 lc = (struct lowcore *)(unsigned long) store_prefix();
2044
2045
2046 lc->panic_stack = S390_lowcore.panic_stack;
2047
2048
2049 set_prefix(0);
2050
2051
2052 __ctl_clear_bit(0,28);
2053
2054
2055 S390_lowcore.mcck_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
2056 S390_lowcore.mcck_new_psw.addr =
2057 (unsigned long) s390_base_mcck_handler;
2058
2059
2060 S390_lowcore.program_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
2061 S390_lowcore.program_new_psw.addr =
2062 (unsigned long) s390_base_pgm_handler;
2063
2064 do_reset_calls();
2065}
2066
