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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * ipl/reipl/dump support for Linux on s390.
4 *
5 * Copyright IBM Corp. 2005, 2012
6 * Author(s): Michael Holzheu <holzheu@de.ibm.com>
7 * Heiko Carstens <heiko.carstens@de.ibm.com>
8 * Volker Sameske <sameske@de.ibm.com>
9 */
10
11#include <linux/types.h>
12#include <linux/export.h>
13#include <linux/init.h>
14#include <linux/device.h>
15#include <linux/delay.h>
16#include <linux/reboot.h>
17#include <linux/ctype.h>
18#include <linux/fs.h>
19#include <linux/gfp.h>
20#include <linux/crash_dump.h>
21#include <linux/debug_locks.h>
22#include <asm/diag.h>
23#include <asm/ipl.h>
24#include <asm/smp.h>
25#include <asm/setup.h>
26#include <asm/cpcmd.h>
27#include <asm/ebcdic.h>
28#include <asm/sclp.h>
29#include <asm/checksum.h>
30#include <asm/debug.h>
31#include <asm/os_info.h>
32#include "entry.h"
33
34#define IPL_PARM_BLOCK_VERSION 0
35
36#define IPL_UNKNOWN_STR "unknown"
37#define IPL_CCW_STR "ccw"
38#define IPL_FCP_STR "fcp"
39#define IPL_FCP_DUMP_STR "fcp_dump"
40#define IPL_NSS_STR "nss"
41
42#define DUMP_CCW_STR "ccw"
43#define DUMP_FCP_STR "fcp"
44#define DUMP_NONE_STR "none"
45
46/*
47 * Four shutdown trigger types are supported:
48 * - panic
49 * - halt
50 * - power off
51 * - reipl
52 * - restart
53 */
54#define ON_PANIC_STR "on_panic"
55#define ON_HALT_STR "on_halt"
56#define ON_POFF_STR "on_poff"
57#define ON_REIPL_STR "on_reboot"
58#define ON_RESTART_STR "on_restart"
59
60struct shutdown_action;
61struct shutdown_trigger {
62 char *name;
63 struct shutdown_action *action;
64};
65
66/*
67 * The following shutdown action types are supported:
68 */
69#define SHUTDOWN_ACTION_IPL_STR "ipl"
70#define SHUTDOWN_ACTION_REIPL_STR "reipl"
71#define SHUTDOWN_ACTION_DUMP_STR "dump"
72#define SHUTDOWN_ACTION_VMCMD_STR "vmcmd"
73#define SHUTDOWN_ACTION_STOP_STR "stop"
74#define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl"
75
76struct shutdown_action {
77 char *name;
78 void (*fn) (struct shutdown_trigger *trigger);
79 int (*init) (void);
80 int init_rc;
81};
82
83static char *ipl_type_str(enum ipl_type type)
84{
85 switch (type) {
86 case IPL_TYPE_CCW:
87 return IPL_CCW_STR;
88 case IPL_TYPE_FCP:
89 return IPL_FCP_STR;
90 case IPL_TYPE_FCP_DUMP:
91 return IPL_FCP_DUMP_STR;
92 case IPL_TYPE_NSS:
93 return IPL_NSS_STR;
94 case IPL_TYPE_UNKNOWN:
95 default:
96 return IPL_UNKNOWN_STR;
97 }
98}
99
100enum dump_type {
101 DUMP_TYPE_NONE = 1,
102 DUMP_TYPE_CCW = 2,
103 DUMP_TYPE_FCP = 4,
104};
105
106static char *dump_type_str(enum dump_type type)
107{
108 switch (type) {
109 case DUMP_TYPE_NONE:
110 return DUMP_NONE_STR;
111 case DUMP_TYPE_CCW:
112 return DUMP_CCW_STR;
113 case DUMP_TYPE_FCP:
114 return DUMP_FCP_STR;
115 default:
116 return NULL;
117 }
118}
119
120static int ipl_block_valid;
121static struct ipl_parameter_block ipl_block;
122
123static int reipl_capabilities = IPL_TYPE_UNKNOWN;
124
125static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
126static struct ipl_parameter_block *reipl_block_fcp;
127static struct ipl_parameter_block *reipl_block_ccw;
128static struct ipl_parameter_block *reipl_block_nss;
129static struct ipl_parameter_block *reipl_block_actual;
130
131static int dump_capabilities = DUMP_TYPE_NONE;
132static enum dump_type dump_type = DUMP_TYPE_NONE;
133static struct ipl_parameter_block *dump_block_fcp;
134static struct ipl_parameter_block *dump_block_ccw;
135
136static struct sclp_ipl_info sclp_ipl_info;
137
138static inline int __diag308(unsigned long subcode, void *addr)
139{
140 register unsigned long _addr asm("0") = (unsigned long) addr;
141 register unsigned long _rc asm("1") = 0;
142
143 asm volatile(
144 " diag %0,%2,0x308\n"
145 "0: nopr %%r7\n"
146 EX_TABLE(0b,0b)
147 : "+d" (_addr), "+d" (_rc)
148 : "d" (subcode) : "cc", "memory");
149 return _rc;
150}
151
152int diag308(unsigned long subcode, void *addr)
153{
154 diag_stat_inc(DIAG_STAT_X308);
155 return __diag308(subcode, addr);
156}
157EXPORT_SYMBOL_GPL(diag308);
158
159/* SYSFS */
160
161#define IPL_ATTR_SHOW_FN(_prefix, _name, _format, args...) \
162static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
163 struct kobj_attribute *attr, \
164 char *page) \
165{ \
166 return snprintf(page, PAGE_SIZE, _format, ##args); \
167}
168
169#define IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk) \
170static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
171 struct kobj_attribute *attr, \
172 const char *buf, size_t len) \
173{ \
174 unsigned long long ssid, devno; \
175 \
176 if (sscanf(buf, "0.%llx.%llx\n", &ssid, &devno) != 2) \
177 return -EINVAL; \
178 \
179 if (ssid > __MAX_SSID || devno > __MAX_SUBCHANNEL) \
180 return -EINVAL; \
181 \
182 _ipl_blk.ssid = ssid; \
183 _ipl_blk.devno = devno; \
184 return len; \
185}
186
187#define DEFINE_IPL_CCW_ATTR_RW(_prefix, _name, _ipl_blk) \
188IPL_ATTR_SHOW_FN(_prefix, _name, "0.%x.%04x\n", \
189 _ipl_blk.ssid, _ipl_blk.devno); \
190IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk); \
191static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
192 __ATTR(_name, (S_IRUGO | S_IWUSR), \
193 sys_##_prefix##_##_name##_show, \
194 sys_##_prefix##_##_name##_store) \
195
196#define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
197IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value) \
198static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
199 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL)
200
201#define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
202IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value) \
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 value; \
208 if (sscanf(buf, _fmt_in, &value) != 1) \
209 return -EINVAL; \
210 _value = value; \
211 return len; \
212} \
213static 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)\
219IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, _value) \
220static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
221 struct kobj_attribute *attr, \
222 const char *buf, size_t len) \
223{ \
224 strncpy(_value, buf, sizeof(_value) - 1); \
225 strim(_value); \
226 return len; \
227} \
228static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
229 __ATTR(_name,(S_IRUGO | S_IWUSR), \
230 sys_##_prefix##_##_name##_show, \
231 sys_##_prefix##_##_name##_store)
232
233/*
234 * ipl section
235 */
236
237static __init enum ipl_type get_ipl_type(void)
238{
239 if (!ipl_block_valid)
240 return IPL_TYPE_UNKNOWN;
241
242 switch (ipl_block.hdr.pbt) {
243 case DIAG308_IPL_TYPE_CCW:
244 return IPL_TYPE_CCW;
245 case DIAG308_IPL_TYPE_FCP:
246 if (ipl_block.ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
247 return IPL_TYPE_FCP_DUMP;
248 else
249 return IPL_TYPE_FCP;
250 }
251 return IPL_TYPE_UNKNOWN;
252}
253
254struct ipl_info ipl_info;
255EXPORT_SYMBOL_GPL(ipl_info);
256
257static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
258 char *page)
259{
260 return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
261}
262
263static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
264
265/* VM IPL PARM routines */
266static size_t reipl_get_ascii_vmparm(char *dest, size_t size,
267 const struct ipl_parameter_block *ipb)
268{
269 int i;
270 size_t len;
271 char has_lowercase = 0;
272
273 len = 0;
274 if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
275 (ipb->ipl_info.ccw.vm_parm_len > 0)) {
276
277 len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
278 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
279 /* If at least one character is lowercase, we assume mixed
280 * case; otherwise we convert everything to lowercase.
281 */
282 for (i = 0; i < len; i++)
283 if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
284 (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
285 (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
286 has_lowercase = 1;
287 break;
288 }
289 if (!has_lowercase)
290 EBC_TOLOWER(dest, len);
291 EBCASC(dest, len);
292 }
293 dest[len] = 0;
294
295 return len;
296}
297
298size_t append_ipl_vmparm(char *dest, size_t size)
299{
300 size_t rc;
301
302 rc = 0;
303 if (ipl_block_valid && ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW)
304 rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
305 else
306 dest[0] = 0;
307 return rc;
308}
309
310static ssize_t ipl_vm_parm_show(struct kobject *kobj,
311 struct kobj_attribute *attr, char *page)
312{
313 char parm[DIAG308_VMPARM_SIZE + 1] = {};
314
315 append_ipl_vmparm(parm, sizeof(parm));
316 return sprintf(page, "%s\n", parm);
317}
318
319static size_t scpdata_length(const char* buf, size_t count)
320{
321 while (count) {
322 if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
323 break;
324 count--;
325 }
326 return count;
327}
328
329static size_t reipl_append_ascii_scpdata(char *dest, size_t size,
330 const struct ipl_parameter_block *ipb)
331{
332 size_t count;
333 size_t i;
334 int has_lowercase;
335
336 count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data,
337 ipb->ipl_info.fcp.scp_data_len));
338 if (!count)
339 goto out;
340
341 has_lowercase = 0;
342 for (i = 0; i < count; i++) {
343 if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
344 count = 0;
345 goto out;
346 }
347 if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
348 has_lowercase = 1;
349 }
350
351 if (has_lowercase)
352 memcpy(dest, ipb->ipl_info.fcp.scp_data, count);
353 else
354 for (i = 0; i < count; i++)
355 dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]);
356out:
357 dest[count] = '\0';
358 return count;
359}
360
361size_t append_ipl_scpdata(char *dest, size_t len)
362{
363 size_t rc;
364
365 rc = 0;
366 if (ipl_block_valid && ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP)
367 rc = reipl_append_ascii_scpdata(dest, len, &ipl_block);
368 else
369 dest[0] = 0;
370 return rc;
371}
372
373
374static struct kobj_attribute sys_ipl_vm_parm_attr =
375 __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
376
377static ssize_t sys_ipl_device_show(struct kobject *kobj,
378 struct kobj_attribute *attr, char *page)
379{
380 switch (ipl_info.type) {
381 case IPL_TYPE_CCW:
382 return sprintf(page, "0.%x.%04x\n", ipl_block.ipl_info.ccw.ssid,
383 ipl_block.ipl_info.ccw.devno);
384 case IPL_TYPE_FCP:
385 case IPL_TYPE_FCP_DUMP:
386 return sprintf(page, "0.0.%04x\n",
387 ipl_block.ipl_info.fcp.devno);
388 default:
389 return 0;
390 }
391}
392
393static struct kobj_attribute sys_ipl_device_attr =
394 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
395
396static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
397 struct bin_attribute *attr, char *buf,
398 loff_t off, size_t count)
399{
400 return memory_read_from_buffer(buf, count, &off, &ipl_block,
401 ipl_block.hdr.len);
402}
403static struct bin_attribute ipl_parameter_attr =
404 __BIN_ATTR(binary_parameter, S_IRUGO, ipl_parameter_read, NULL,
405 PAGE_SIZE);
406
407static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
408 struct bin_attribute *attr, char *buf,
409 loff_t off, size_t count)
410{
411 unsigned int size = ipl_block.ipl_info.fcp.scp_data_len;
412 void *scp_data = &ipl_block.ipl_info.fcp.scp_data;
413
414 return memory_read_from_buffer(buf, count, &off, scp_data, size);
415}
416static struct bin_attribute ipl_scp_data_attr =
417 __BIN_ATTR(scp_data, S_IRUGO, ipl_scp_data_read, NULL, PAGE_SIZE);
418
419static struct bin_attribute *ipl_fcp_bin_attrs[] = {
420 &ipl_parameter_attr,
421 &ipl_scp_data_attr,
422 NULL,
423};
424
425/* FCP ipl device attributes */
426
427DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n",
428 (unsigned long long)ipl_block.ipl_info.fcp.wwpn);
429DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n",
430 (unsigned long long)ipl_block.ipl_info.fcp.lun);
431DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n",
432 (unsigned long long)ipl_block.ipl_info.fcp.bootprog);
433DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n",
434 (unsigned long long)ipl_block.ipl_info.fcp.br_lba);
435
436static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
437 struct kobj_attribute *attr, char *page)
438{
439 char loadparm[LOADPARM_LEN + 1] = {};
440
441 if (!sclp_ipl_info.is_valid)
442 return sprintf(page, "#unknown#\n");
443 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
444 EBCASC(loadparm, LOADPARM_LEN);
445 strim(loadparm);
446 return sprintf(page, "%s\n", loadparm);
447}
448
449static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
450 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
451
452static struct attribute *ipl_fcp_attrs[] = {
453 &sys_ipl_type_attr.attr,
454 &sys_ipl_device_attr.attr,
455 &sys_ipl_fcp_wwpn_attr.attr,
456 &sys_ipl_fcp_lun_attr.attr,
457 &sys_ipl_fcp_bootprog_attr.attr,
458 &sys_ipl_fcp_br_lba_attr.attr,
459 &sys_ipl_ccw_loadparm_attr.attr,
460 NULL,
461};
462
463static struct attribute_group ipl_fcp_attr_group = {
464 .attrs = ipl_fcp_attrs,
465 .bin_attrs = ipl_fcp_bin_attrs,
466};
467
468/* CCW ipl device attributes */
469
470static struct attribute *ipl_ccw_attrs_vm[] = {
471 &sys_ipl_type_attr.attr,
472 &sys_ipl_device_attr.attr,
473 &sys_ipl_ccw_loadparm_attr.attr,
474 &sys_ipl_vm_parm_attr.attr,
475 NULL,
476};
477
478static struct attribute *ipl_ccw_attrs_lpar[] = {
479 &sys_ipl_type_attr.attr,
480 &sys_ipl_device_attr.attr,
481 &sys_ipl_ccw_loadparm_attr.attr,
482 NULL,
483};
484
485static struct attribute_group ipl_ccw_attr_group_vm = {
486 .attrs = ipl_ccw_attrs_vm,
487};
488
489static struct attribute_group ipl_ccw_attr_group_lpar = {
490 .attrs = ipl_ccw_attrs_lpar
491};
492
493/* UNKNOWN ipl device attributes */
494
495static struct attribute *ipl_unknown_attrs[] = {
496 &sys_ipl_type_attr.attr,
497 NULL,
498};
499
500static struct attribute_group ipl_unknown_attr_group = {
501 .attrs = ipl_unknown_attrs,
502};
503
504static struct kset *ipl_kset;
505
506static void __ipl_run(void *unused)
507{
508 __bpon();
509 diag308(DIAG308_LOAD_CLEAR, NULL);
510}
511
512static void ipl_run(struct shutdown_trigger *trigger)
513{
514 smp_call_ipl_cpu(__ipl_run, NULL);
515}
516
517static int __init ipl_init(void)
518{
519 int rc;
520
521 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
522 if (!ipl_kset) {
523 rc = -ENOMEM;
524 goto out;
525 }
526 switch (ipl_info.type) {
527 case IPL_TYPE_CCW:
528 if (MACHINE_IS_VM)
529 rc = sysfs_create_group(&ipl_kset->kobj,
530 &ipl_ccw_attr_group_vm);
531 else
532 rc = sysfs_create_group(&ipl_kset->kobj,
533 &ipl_ccw_attr_group_lpar);
534 break;
535 case IPL_TYPE_FCP:
536 case IPL_TYPE_FCP_DUMP:
537 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
538 break;
539 default:
540 rc = sysfs_create_group(&ipl_kset->kobj,
541 &ipl_unknown_attr_group);
542 break;
543 }
544out:
545 if (rc)
546 panic("ipl_init failed: rc = %i\n", rc);
547
548 return 0;
549}
550
551static struct shutdown_action __refdata ipl_action = {
552 .name = SHUTDOWN_ACTION_IPL_STR,
553 .fn = ipl_run,
554 .init = ipl_init,
555};
556
557/*
558 * reipl shutdown action: Reboot Linux on shutdown.
559 */
560
561/* VM IPL PARM attributes */
562static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
563 char *page)
564{
565 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
566
567 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
568 return sprintf(page, "%s\n", vmparm);
569}
570
571static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
572 size_t vmparm_max,
573 const char *buf, size_t len)
574{
575 int i, ip_len;
576
577 /* ignore trailing newline */
578 ip_len = len;
579 if ((len > 0) && (buf[len - 1] == '\n'))
580 ip_len--;
581
582 if (ip_len > vmparm_max)
583 return -EINVAL;
584
585 /* parm is used to store kernel options, check for common chars */
586 for (i = 0; i < ip_len; i++)
587 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
588 return -EINVAL;
589
590 memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
591 ipb->ipl_info.ccw.vm_parm_len = ip_len;
592 if (ip_len > 0) {
593 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
594 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
595 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
596 } else {
597 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
598 }
599
600 return len;
601}
602
603/* NSS wrapper */
604static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
605 struct kobj_attribute *attr, char *page)
606{
607 return reipl_generic_vmparm_show(reipl_block_nss, page);
608}
609
610static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
611 struct kobj_attribute *attr,
612 const char *buf, size_t len)
613{
614 return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
615}
616
617/* CCW wrapper */
618static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
619 struct kobj_attribute *attr, char *page)
620{
621 return reipl_generic_vmparm_show(reipl_block_ccw, page);
622}
623
624static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
625 struct kobj_attribute *attr,
626 const char *buf, size_t len)
627{
628 return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
629}
630
631static struct kobj_attribute sys_reipl_nss_vmparm_attr =
632 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
633 reipl_nss_vmparm_store);
634static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
635 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
636 reipl_ccw_vmparm_store);
637
638/* FCP reipl device attributes */
639
640static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
641 struct bin_attribute *attr,
642 char *buf, loff_t off, size_t count)
643{
644 size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
645 void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
646
647 return memory_read_from_buffer(buf, count, &off, scp_data, size);
648}
649
650static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
651 struct bin_attribute *attr,
652 char *buf, loff_t off, size_t count)
653{
654 size_t scpdata_len = count;
655 size_t padding;
656
657
658 if (off)
659 return -EINVAL;
660
661 memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf, count);
662 if (scpdata_len % 8) {
663 padding = 8 - (scpdata_len % 8);
664 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
665 0, padding);
666 scpdata_len += padding;
667 }
668
669 reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
670 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
671 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
672
673 return count;
674}
675static struct bin_attribute sys_reipl_fcp_scp_data_attr =
676 __BIN_ATTR(scp_data, (S_IRUGO | S_IWUSR), reipl_fcp_scpdata_read,
677 reipl_fcp_scpdata_write, DIAG308_SCPDATA_SIZE);
678
679static struct bin_attribute *reipl_fcp_bin_attrs[] = {
680 &sys_reipl_fcp_scp_data_attr,
681 NULL,
682};
683
684DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n",
685 reipl_block_fcp->ipl_info.fcp.wwpn);
686DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n",
687 reipl_block_fcp->ipl_info.fcp.lun);
688DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
689 reipl_block_fcp->ipl_info.fcp.bootprog);
690DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
691 reipl_block_fcp->ipl_info.fcp.br_lba);
692DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
693 reipl_block_fcp->ipl_info.fcp.devno);
694
695static void reipl_get_ascii_loadparm(char *loadparm,
696 struct ipl_parameter_block *ibp)
697{
698 memcpy(loadparm, ibp->hdr.loadparm, LOADPARM_LEN);
699 EBCASC(loadparm, LOADPARM_LEN);
700 loadparm[LOADPARM_LEN] = 0;
701 strim(loadparm);
702}
703
704static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
705 char *page)
706{
707 char buf[LOADPARM_LEN + 1];
708
709 reipl_get_ascii_loadparm(buf, ipb);
710 return sprintf(page, "%s\n", buf);
711}
712
713static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
714 const char *buf, size_t len)
715{
716 int i, lp_len;
717
718 /* ignore trailing newline */
719 lp_len = len;
720 if ((len > 0) && (buf[len - 1] == '\n'))
721 lp_len--;
722 /* loadparm can have max 8 characters and must not start with a blank */
723 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
724 return -EINVAL;
725 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
726 for (i = 0; i < lp_len; i++) {
727 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
728 (buf[i] == '.'))
729 continue;
730 return -EINVAL;
731 }
732 /* initialize loadparm with blanks */
733 memset(ipb->hdr.loadparm, ' ', LOADPARM_LEN);
734 /* copy and convert to ebcdic */
735 memcpy(ipb->hdr.loadparm, buf, lp_len);
736 ASCEBC(ipb->hdr.loadparm, LOADPARM_LEN);
737 ipb->hdr.flags |= DIAG308_FLAGS_LP_VALID;
738 return len;
739}
740
741/* FCP wrapper */
742static ssize_t reipl_fcp_loadparm_show(struct kobject *kobj,
743 struct kobj_attribute *attr, char *page)
744{
745 return reipl_generic_loadparm_show(reipl_block_fcp, page);
746}
747
748static ssize_t reipl_fcp_loadparm_store(struct kobject *kobj,
749 struct kobj_attribute *attr,
750 const char *buf, size_t len)
751{
752 return reipl_generic_loadparm_store(reipl_block_fcp, buf, len);
753}
754
755static struct kobj_attribute sys_reipl_fcp_loadparm_attr =
756 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_fcp_loadparm_show,
757 reipl_fcp_loadparm_store);
758
759static struct attribute *reipl_fcp_attrs[] = {
760 &sys_reipl_fcp_device_attr.attr,
761 &sys_reipl_fcp_wwpn_attr.attr,
762 &sys_reipl_fcp_lun_attr.attr,
763 &sys_reipl_fcp_bootprog_attr.attr,
764 &sys_reipl_fcp_br_lba_attr.attr,
765 &sys_reipl_fcp_loadparm_attr.attr,
766 NULL,
767};
768
769static struct attribute_group reipl_fcp_attr_group = {
770 .attrs = reipl_fcp_attrs,
771 .bin_attrs = reipl_fcp_bin_attrs,
772};
773
774/* CCW reipl device attributes */
775DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ipl_info.ccw);
776
777/* NSS wrapper */
778static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
779 struct kobj_attribute *attr, char *page)
780{
781 return reipl_generic_loadparm_show(reipl_block_nss, page);
782}
783
784static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
785 struct kobj_attribute *attr,
786 const char *buf, size_t len)
787{
788 return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
789}
790
791/* CCW wrapper */
792static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
793 struct kobj_attribute *attr, char *page)
794{
795 return reipl_generic_loadparm_show(reipl_block_ccw, page);
796}
797
798static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
799 struct kobj_attribute *attr,
800 const char *buf, size_t len)
801{
802 return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
803}
804
805static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
806 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
807 reipl_ccw_loadparm_store);
808
809static struct attribute *reipl_ccw_attrs_vm[] = {
810 &sys_reipl_ccw_device_attr.attr,
811 &sys_reipl_ccw_loadparm_attr.attr,
812 &sys_reipl_ccw_vmparm_attr.attr,
813 NULL,
814};
815
816static struct attribute *reipl_ccw_attrs_lpar[] = {
817 &sys_reipl_ccw_device_attr.attr,
818 &sys_reipl_ccw_loadparm_attr.attr,
819 NULL,
820};
821
822static struct attribute_group reipl_ccw_attr_group_vm = {
823 .name = IPL_CCW_STR,
824 .attrs = reipl_ccw_attrs_vm,
825};
826
827static struct attribute_group reipl_ccw_attr_group_lpar = {
828 .name = IPL_CCW_STR,
829 .attrs = reipl_ccw_attrs_lpar,
830};
831
832
833/* NSS reipl device attributes */
834static void reipl_get_ascii_nss_name(char *dst,
835 struct ipl_parameter_block *ipb)
836{
837 memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
838 EBCASC(dst, NSS_NAME_SIZE);
839 dst[NSS_NAME_SIZE] = 0;
840}
841
842static ssize_t reipl_nss_name_show(struct kobject *kobj,
843 struct kobj_attribute *attr, char *page)
844{
845 char nss_name[NSS_NAME_SIZE + 1] = {};
846
847 reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
848 return sprintf(page, "%s\n", nss_name);
849}
850
851static ssize_t reipl_nss_name_store(struct kobject *kobj,
852 struct kobj_attribute *attr,
853 const char *buf, size_t len)
854{
855 int nss_len;
856
857 /* ignore trailing newline */
858 nss_len = len;
859 if ((len > 0) && (buf[len - 1] == '\n'))
860 nss_len--;
861
862 if (nss_len > NSS_NAME_SIZE)
863 return -EINVAL;
864
865 memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
866 if (nss_len > 0) {
867 reipl_block_nss->ipl_info.ccw.vm_flags |=
868 DIAG308_VM_FLAGS_NSS_VALID;
869 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
870 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
871 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
872 } else {
873 reipl_block_nss->ipl_info.ccw.vm_flags &=
874 ~DIAG308_VM_FLAGS_NSS_VALID;
875 }
876
877 return len;
878}
879
880static struct kobj_attribute sys_reipl_nss_name_attr =
881 __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
882 reipl_nss_name_store);
883
884static struct kobj_attribute sys_reipl_nss_loadparm_attr =
885 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
886 reipl_nss_loadparm_store);
887
888static struct attribute *reipl_nss_attrs[] = {
889 &sys_reipl_nss_name_attr.attr,
890 &sys_reipl_nss_loadparm_attr.attr,
891 &sys_reipl_nss_vmparm_attr.attr,
892 NULL,
893};
894
895static struct attribute_group reipl_nss_attr_group = {
896 .name = IPL_NSS_STR,
897 .attrs = reipl_nss_attrs,
898};
899
900void set_os_info_reipl_block(void)
901{
902 os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual,
903 reipl_block_actual->hdr.len);
904}
905
906/* reipl type */
907
908static int reipl_set_type(enum ipl_type type)
909{
910 if (!(reipl_capabilities & type))
911 return -EINVAL;
912
913 switch(type) {
914 case IPL_TYPE_CCW:
915 reipl_block_actual = reipl_block_ccw;
916 break;
917 case IPL_TYPE_FCP:
918 reipl_block_actual = reipl_block_fcp;
919 break;
920 case IPL_TYPE_NSS:
921 reipl_block_actual = reipl_block_nss;
922 break;
923 default:
924 break;
925 }
926 reipl_type = type;
927 return 0;
928}
929
930static ssize_t reipl_type_show(struct kobject *kobj,
931 struct kobj_attribute *attr, char *page)
932{
933 return sprintf(page, "%s\n", ipl_type_str(reipl_type));
934}
935
936static ssize_t reipl_type_store(struct kobject *kobj,
937 struct kobj_attribute *attr,
938 const char *buf, size_t len)
939{
940 int rc = -EINVAL;
941
942 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
943 rc = reipl_set_type(IPL_TYPE_CCW);
944 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
945 rc = reipl_set_type(IPL_TYPE_FCP);
946 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
947 rc = reipl_set_type(IPL_TYPE_NSS);
948 return (rc != 0) ? rc : len;
949}
950
951static struct kobj_attribute reipl_type_attr =
952 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
953
954static struct kset *reipl_kset;
955static struct kset *reipl_fcp_kset;
956
957static void __reipl_run(void *unused)
958{
959 switch (reipl_type) {
960 case IPL_TYPE_CCW:
961 diag308(DIAG308_SET, reipl_block_ccw);
962 diag308(DIAG308_LOAD_CLEAR, NULL);
963 break;
964 case IPL_TYPE_FCP:
965 diag308(DIAG308_SET, reipl_block_fcp);
966 diag308(DIAG308_LOAD_CLEAR, NULL);
967 break;
968 case IPL_TYPE_NSS:
969 diag308(DIAG308_SET, reipl_block_nss);
970 diag308(DIAG308_LOAD_CLEAR, NULL);
971 break;
972 case IPL_TYPE_UNKNOWN:
973 diag308(DIAG308_LOAD_CLEAR, NULL);
974 break;
975 case IPL_TYPE_FCP_DUMP:
976 break;
977 }
978 disabled_wait((unsigned long) __builtin_return_address(0));
979}
980
981static void reipl_run(struct shutdown_trigger *trigger)
982{
983 smp_call_ipl_cpu(__reipl_run, NULL);
984}
985
986static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
987{
988 ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
989 ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
990 ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
991 ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
992}
993
994static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
995{
996 /* LOADPARM */
997 /* check if read scp info worked and set loadparm */
998 if (sclp_ipl_info.is_valid)
999 memcpy(ipb->hdr.loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
1000 else
1001 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1002 memset(ipb->hdr.loadparm, 0x40, LOADPARM_LEN);
1003 ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
1004
1005 /* VM PARM */
1006 if (MACHINE_IS_VM && ipl_block_valid &&
1007 (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1008
1009 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1010 ipb->ipl_info.ccw.vm_parm_len =
1011 ipl_block.ipl_info.ccw.vm_parm_len;
1012 memcpy(ipb->ipl_info.ccw.vm_parm,
1013 ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1014 }
1015}
1016
1017static int __init reipl_nss_init(void)
1018{
1019 int rc;
1020
1021 if (!MACHINE_IS_VM)
1022 return 0;
1023
1024 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1025 if (!reipl_block_nss)
1026 return -ENOMEM;
1027
1028 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1029 if (rc)
1030 return rc;
1031
1032 reipl_block_ccw_init(reipl_block_nss);
1033 reipl_capabilities |= IPL_TYPE_NSS;
1034 return 0;
1035}
1036
1037static int __init reipl_ccw_init(void)
1038{
1039 int rc;
1040
1041 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1042 if (!reipl_block_ccw)
1043 return -ENOMEM;
1044
1045 rc = sysfs_create_group(&reipl_kset->kobj,
1046 MACHINE_IS_VM ? &reipl_ccw_attr_group_vm
1047 : &reipl_ccw_attr_group_lpar);
1048 if (rc)
1049 return rc;
1050
1051 reipl_block_ccw_init(reipl_block_ccw);
1052 if (ipl_info.type == IPL_TYPE_CCW) {
1053 reipl_block_ccw->ipl_info.ccw.ssid = ipl_block.ipl_info.ccw.ssid;
1054 reipl_block_ccw->ipl_info.ccw.devno = ipl_block.ipl_info.ccw.devno;
1055 reipl_block_ccw_fill_parms(reipl_block_ccw);
1056 }
1057
1058 reipl_capabilities |= IPL_TYPE_CCW;
1059 return 0;
1060}
1061
1062static int __init reipl_fcp_init(void)
1063{
1064 int rc;
1065
1066 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1067 if (!reipl_block_fcp)
1068 return -ENOMEM;
1069
1070 /* sysfs: create fcp kset for mixing attr group and bin attrs */
1071 reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1072 &reipl_kset->kobj);
1073 if (!reipl_fcp_kset) {
1074 free_page((unsigned long) reipl_block_fcp);
1075 return -ENOMEM;
1076 }
1077
1078 rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1079 if (rc) {
1080 kset_unregister(reipl_fcp_kset);
1081 free_page((unsigned long) reipl_block_fcp);
1082 return rc;
1083 }
1084
1085 if (ipl_info.type == IPL_TYPE_FCP) {
1086 memcpy(reipl_block_fcp, &ipl_block, sizeof(ipl_block));
1087 /*
1088 * Fix loadparm: There are systems where the (SCSI) LOADPARM
1089 * is invalid in the SCSI IPL parameter block, so take it
1090 * always from sclp_ipl_info.
1091 */
1092 memcpy(reipl_block_fcp->hdr.loadparm, sclp_ipl_info.loadparm,
1093 LOADPARM_LEN);
1094 } else {
1095 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1096 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1097 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1098 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1099 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1100 }
1101 reipl_capabilities |= IPL_TYPE_FCP;
1102 return 0;
1103}
1104
1105static int __init reipl_type_init(void)
1106{
1107 enum ipl_type reipl_type = ipl_info.type;
1108 struct ipl_parameter_block *reipl_block;
1109 unsigned long size;
1110
1111 reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size);
1112 if (!reipl_block)
1113 goto out;
1114 /*
1115 * If we have an OS info reipl block, this will be used
1116 */
1117 if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_FCP) {
1118 memcpy(reipl_block_fcp, reipl_block, size);
1119 reipl_type = IPL_TYPE_FCP;
1120 } else if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_CCW) {
1121 memcpy(reipl_block_ccw, reipl_block, size);
1122 reipl_type = IPL_TYPE_CCW;
1123 }
1124out:
1125 return reipl_set_type(reipl_type);
1126}
1127
1128static int __init reipl_init(void)
1129{
1130 int rc;
1131
1132 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1133 if (!reipl_kset)
1134 return -ENOMEM;
1135 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1136 if (rc) {
1137 kset_unregister(reipl_kset);
1138 return rc;
1139 }
1140 rc = reipl_ccw_init();
1141 if (rc)
1142 return rc;
1143 rc = reipl_fcp_init();
1144 if (rc)
1145 return rc;
1146 rc = reipl_nss_init();
1147 if (rc)
1148 return rc;
1149 return reipl_type_init();
1150}
1151
1152static struct shutdown_action __refdata reipl_action = {
1153 .name = SHUTDOWN_ACTION_REIPL_STR,
1154 .fn = reipl_run,
1155 .init = reipl_init,
1156};
1157
1158/*
1159 * dump shutdown action: Dump Linux on shutdown.
1160 */
1161
1162/* FCP dump device attributes */
1163
1164DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n",
1165 dump_block_fcp->ipl_info.fcp.wwpn);
1166DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n",
1167 dump_block_fcp->ipl_info.fcp.lun);
1168DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1169 dump_block_fcp->ipl_info.fcp.bootprog);
1170DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1171 dump_block_fcp->ipl_info.fcp.br_lba);
1172DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1173 dump_block_fcp->ipl_info.fcp.devno);
1174
1175static struct attribute *dump_fcp_attrs[] = {
1176 &sys_dump_fcp_device_attr.attr,
1177 &sys_dump_fcp_wwpn_attr.attr,
1178 &sys_dump_fcp_lun_attr.attr,
1179 &sys_dump_fcp_bootprog_attr.attr,
1180 &sys_dump_fcp_br_lba_attr.attr,
1181 NULL,
1182};
1183
1184static struct attribute_group dump_fcp_attr_group = {
1185 .name = IPL_FCP_STR,
1186 .attrs = dump_fcp_attrs,
1187};
1188
1189/* CCW dump device attributes */
1190DEFINE_IPL_CCW_ATTR_RW(dump_ccw, device, dump_block_ccw->ipl_info.ccw);
1191
1192static struct attribute *dump_ccw_attrs[] = {
1193 &sys_dump_ccw_device_attr.attr,
1194 NULL,
1195};
1196
1197static struct attribute_group dump_ccw_attr_group = {
1198 .name = IPL_CCW_STR,
1199 .attrs = dump_ccw_attrs,
1200};
1201
1202/* dump type */
1203
1204static int dump_set_type(enum dump_type type)
1205{
1206 if (!(dump_capabilities & type))
1207 return -EINVAL;
1208 dump_type = type;
1209 return 0;
1210}
1211
1212static ssize_t dump_type_show(struct kobject *kobj,
1213 struct kobj_attribute *attr, char *page)
1214{
1215 return sprintf(page, "%s\n", dump_type_str(dump_type));
1216}
1217
1218static ssize_t dump_type_store(struct kobject *kobj,
1219 struct kobj_attribute *attr,
1220 const char *buf, size_t len)
1221{
1222 int rc = -EINVAL;
1223
1224 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1225 rc = dump_set_type(DUMP_TYPE_NONE);
1226 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1227 rc = dump_set_type(DUMP_TYPE_CCW);
1228 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1229 rc = dump_set_type(DUMP_TYPE_FCP);
1230 return (rc != 0) ? rc : len;
1231}
1232
1233static struct kobj_attribute dump_type_attr =
1234 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1235
1236static struct kset *dump_kset;
1237
1238static void diag308_dump(void *dump_block)
1239{
1240 diag308(DIAG308_SET, dump_block);
1241 while (1) {
1242 if (diag308(DIAG308_LOAD_NORMAL_DUMP, NULL) != 0x302)
1243 break;
1244 udelay_simple(USEC_PER_SEC);
1245 }
1246}
1247
1248static void __dump_run(void *unused)
1249{
1250 switch (dump_type) {
1251 case DUMP_TYPE_CCW:
1252 diag308_dump(dump_block_ccw);
1253 break;
1254 case DUMP_TYPE_FCP:
1255 diag308_dump(dump_block_fcp);
1256 break;
1257 default:
1258 break;
1259 }
1260}
1261
1262static void dump_run(struct shutdown_trigger *trigger)
1263{
1264 if (dump_type == DUMP_TYPE_NONE)
1265 return;
1266 smp_send_stop();
1267 smp_call_ipl_cpu(__dump_run, NULL);
1268}
1269
1270static int __init dump_ccw_init(void)
1271{
1272 int rc;
1273
1274 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1275 if (!dump_block_ccw)
1276 return -ENOMEM;
1277 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1278 if (rc) {
1279 free_page((unsigned long)dump_block_ccw);
1280 return rc;
1281 }
1282 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1283 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1284 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1285 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1286 dump_capabilities |= DUMP_TYPE_CCW;
1287 return 0;
1288}
1289
1290static int __init dump_fcp_init(void)
1291{
1292 int rc;
1293
1294 if (!sclp_ipl_info.has_dump)
1295 return 0; /* LDIPL DUMP is not installed */
1296 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1297 if (!dump_block_fcp)
1298 return -ENOMEM;
1299 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1300 if (rc) {
1301 free_page((unsigned long)dump_block_fcp);
1302 return rc;
1303 }
1304 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1305 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1306 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1307 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1308 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1309 dump_capabilities |= DUMP_TYPE_FCP;
1310 return 0;
1311}
1312
1313static int __init dump_init(void)
1314{
1315 int rc;
1316
1317 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1318 if (!dump_kset)
1319 return -ENOMEM;
1320 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1321 if (rc) {
1322 kset_unregister(dump_kset);
1323 return rc;
1324 }
1325 rc = dump_ccw_init();
1326 if (rc)
1327 return rc;
1328 rc = dump_fcp_init();
1329 if (rc)
1330 return rc;
1331 dump_set_type(DUMP_TYPE_NONE);
1332 return 0;
1333}
1334
1335static struct shutdown_action __refdata dump_action = {
1336 .name = SHUTDOWN_ACTION_DUMP_STR,
1337 .fn = dump_run,
1338 .init = dump_init,
1339};
1340
1341static void dump_reipl_run(struct shutdown_trigger *trigger)
1342{
1343 unsigned long ipib = (unsigned long) reipl_block_actual;
1344 unsigned int csum;
1345
1346 csum = (__force unsigned int)
1347 csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
1348 mem_assign_absolute(S390_lowcore.ipib, ipib);
1349 mem_assign_absolute(S390_lowcore.ipib_checksum, csum);
1350 dump_run(trigger);
1351}
1352
1353static struct shutdown_action __refdata dump_reipl_action = {
1354 .name = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1355 .fn = dump_reipl_run,
1356};
1357
1358/*
1359 * vmcmd shutdown action: Trigger vm command on shutdown.
1360 */
1361
1362static char vmcmd_on_reboot[128];
1363static char vmcmd_on_panic[128];
1364static char vmcmd_on_halt[128];
1365static char vmcmd_on_poff[128];
1366static char vmcmd_on_restart[128];
1367
1368DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1369DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1370DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1371DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1372DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1373
1374static struct attribute *vmcmd_attrs[] = {
1375 &sys_vmcmd_on_reboot_attr.attr,
1376 &sys_vmcmd_on_panic_attr.attr,
1377 &sys_vmcmd_on_halt_attr.attr,
1378 &sys_vmcmd_on_poff_attr.attr,
1379 &sys_vmcmd_on_restart_attr.attr,
1380 NULL,
1381};
1382
1383static struct attribute_group vmcmd_attr_group = {
1384 .attrs = vmcmd_attrs,
1385};
1386
1387static struct kset *vmcmd_kset;
1388
1389static void vmcmd_run(struct shutdown_trigger *trigger)
1390{
1391 char *cmd;
1392
1393 if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1394 cmd = vmcmd_on_reboot;
1395 else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1396 cmd = vmcmd_on_panic;
1397 else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1398 cmd = vmcmd_on_halt;
1399 else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1400 cmd = vmcmd_on_poff;
1401 else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
1402 cmd = vmcmd_on_restart;
1403 else
1404 return;
1405
1406 if (strlen(cmd) == 0)
1407 return;
1408 __cpcmd(cmd, NULL, 0, NULL);
1409}
1410
1411static int vmcmd_init(void)
1412{
1413 if (!MACHINE_IS_VM)
1414 return -EOPNOTSUPP;
1415 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1416 if (!vmcmd_kset)
1417 return -ENOMEM;
1418 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1419}
1420
1421static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1422 vmcmd_run, vmcmd_init};
1423
1424/*
1425 * stop shutdown action: Stop Linux on shutdown.
1426 */
1427
1428static void stop_run(struct shutdown_trigger *trigger)
1429{
1430 if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
1431 strcmp(trigger->name, ON_RESTART_STR) == 0)
1432 disabled_wait((unsigned long) __builtin_return_address(0));
1433 smp_stop_cpu();
1434}
1435
1436static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1437 stop_run, NULL};
1438
1439/* action list */
1440
1441static struct shutdown_action *shutdown_actions_list[] = {
1442 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1443 &vmcmd_action, &stop_action};
1444#define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1445
1446/*
1447 * Trigger section
1448 */
1449
1450static struct kset *shutdown_actions_kset;
1451
1452static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1453 size_t len)
1454{
1455 int i;
1456
1457 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1458 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1459 if (shutdown_actions_list[i]->init_rc) {
1460 return shutdown_actions_list[i]->init_rc;
1461 } else {
1462 trigger->action = shutdown_actions_list[i];
1463 return len;
1464 }
1465 }
1466 }
1467 return -EINVAL;
1468}
1469
1470/* on reipl */
1471
1472static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1473 &reipl_action};
1474
1475static ssize_t on_reboot_show(struct kobject *kobj,
1476 struct kobj_attribute *attr, char *page)
1477{
1478 return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1479}
1480
1481static ssize_t on_reboot_store(struct kobject *kobj,
1482 struct kobj_attribute *attr,
1483 const char *buf, size_t len)
1484{
1485 return set_trigger(buf, &on_reboot_trigger, len);
1486}
1487static struct kobj_attribute on_reboot_attr = __ATTR_RW(on_reboot);
1488
1489static void do_machine_restart(char *__unused)
1490{
1491 smp_send_stop();
1492 on_reboot_trigger.action->fn(&on_reboot_trigger);
1493 reipl_run(NULL);
1494}
1495void (*_machine_restart)(char *command) = do_machine_restart;
1496
1497/* on panic */
1498
1499static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1500
1501static ssize_t on_panic_show(struct kobject *kobj,
1502 struct kobj_attribute *attr, char *page)
1503{
1504 return sprintf(page, "%s\n", on_panic_trigger.action->name);
1505}
1506
1507static ssize_t on_panic_store(struct kobject *kobj,
1508 struct kobj_attribute *attr,
1509 const char *buf, size_t len)
1510{
1511 return set_trigger(buf, &on_panic_trigger, len);
1512}
1513static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic);
1514
1515static void do_panic(void)
1516{
1517 lgr_info_log();
1518 on_panic_trigger.action->fn(&on_panic_trigger);
1519 stop_run(&on_panic_trigger);
1520}
1521
1522/* on restart */
1523
1524static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
1525 &stop_action};
1526
1527static ssize_t on_restart_show(struct kobject *kobj,
1528 struct kobj_attribute *attr, char *page)
1529{
1530 return sprintf(page, "%s\n", on_restart_trigger.action->name);
1531}
1532
1533static ssize_t on_restart_store(struct kobject *kobj,
1534 struct kobj_attribute *attr,
1535 const char *buf, size_t len)
1536{
1537 return set_trigger(buf, &on_restart_trigger, len);
1538}
1539static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart);
1540
1541static void __do_restart(void *ignore)
1542{
1543 __arch_local_irq_stosm(0x04); /* enable DAT */
1544 smp_send_stop();
1545#ifdef CONFIG_CRASH_DUMP
1546 crash_kexec(NULL);
1547#endif
1548 on_restart_trigger.action->fn(&on_restart_trigger);
1549 stop_run(&on_restart_trigger);
1550}
1551
1552void do_restart(void)
1553{
1554 tracing_off();
1555 debug_locks_off();
1556 lgr_info_log();
1557 smp_call_online_cpu(__do_restart, NULL);
1558}
1559
1560/* on halt */
1561
1562static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1563
1564static ssize_t on_halt_show(struct kobject *kobj,
1565 struct kobj_attribute *attr, char *page)
1566{
1567 return sprintf(page, "%s\n", on_halt_trigger.action->name);
1568}
1569
1570static ssize_t on_halt_store(struct kobject *kobj,
1571 struct kobj_attribute *attr,
1572 const char *buf, size_t len)
1573{
1574 return set_trigger(buf, &on_halt_trigger, len);
1575}
1576static struct kobj_attribute on_halt_attr = __ATTR_RW(on_halt);
1577
1578static void do_machine_halt(void)
1579{
1580 smp_send_stop();
1581 on_halt_trigger.action->fn(&on_halt_trigger);
1582 stop_run(&on_halt_trigger);
1583}
1584void (*_machine_halt)(void) = do_machine_halt;
1585
1586/* on power off */
1587
1588static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1589
1590static ssize_t on_poff_show(struct kobject *kobj,
1591 struct kobj_attribute *attr, char *page)
1592{
1593 return sprintf(page, "%s\n", on_poff_trigger.action->name);
1594}
1595
1596static ssize_t on_poff_store(struct kobject *kobj,
1597 struct kobj_attribute *attr,
1598 const char *buf, size_t len)
1599{
1600 return set_trigger(buf, &on_poff_trigger, len);
1601}
1602static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff);
1603
1604static void do_machine_power_off(void)
1605{
1606 smp_send_stop();
1607 on_poff_trigger.action->fn(&on_poff_trigger);
1608 stop_run(&on_poff_trigger);
1609}
1610void (*_machine_power_off)(void) = do_machine_power_off;
1611
1612static struct attribute *shutdown_action_attrs[] = {
1613 &on_restart_attr.attr,
1614 &on_reboot_attr.attr,
1615 &on_panic_attr.attr,
1616 &on_halt_attr.attr,
1617 &on_poff_attr.attr,
1618 NULL,
1619};
1620
1621static struct attribute_group shutdown_action_attr_group = {
1622 .attrs = shutdown_action_attrs,
1623};
1624
1625static void __init shutdown_triggers_init(void)
1626{
1627 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1628 firmware_kobj);
1629 if (!shutdown_actions_kset)
1630 goto fail;
1631 if (sysfs_create_group(&shutdown_actions_kset->kobj,
1632 &shutdown_action_attr_group))
1633 goto fail;
1634 return;
1635fail:
1636 panic("shutdown_triggers_init failed\n");
1637}
1638
1639static void __init shutdown_actions_init(void)
1640{
1641 int i;
1642
1643 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1644 if (!shutdown_actions_list[i]->init)
1645 continue;
1646 shutdown_actions_list[i]->init_rc =
1647 shutdown_actions_list[i]->init();
1648 }
1649}
1650
1651static int __init s390_ipl_init(void)
1652{
1653 char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40};
1654
1655 sclp_early_get_ipl_info(&sclp_ipl_info);
1656 /*
1657 * Fix loadparm: There are systems where the (SCSI) LOADPARM
1658 * returned by read SCP info is invalid (contains EBCDIC blanks)
1659 * when the system has been booted via diag308. In that case we use
1660 * the value from diag308, if available.
1661 *
1662 * There are also systems where diag308 store does not work in
1663 * case the system is booted from HMC. Fortunately in this case
1664 * READ SCP info provides the correct value.
1665 */
1666 if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 && ipl_block_valid)
1667 memcpy(sclp_ipl_info.loadparm, ipl_block.hdr.loadparm, LOADPARM_LEN);
1668 shutdown_actions_init();
1669 shutdown_triggers_init();
1670 return 0;
1671}
1672
1673__initcall(s390_ipl_init);
1674
1675static void __init strncpy_skip_quote(char *dst, char *src, int n)
1676{
1677 int sx, dx;
1678
1679 dx = 0;
1680 for (sx = 0; src[sx] != 0; sx++) {
1681 if (src[sx] == '"')
1682 continue;
1683 dst[dx++] = src[sx];
1684 if (dx >= n)
1685 break;
1686 }
1687}
1688
1689static int __init vmcmd_on_reboot_setup(char *str)
1690{
1691 if (!MACHINE_IS_VM)
1692 return 1;
1693 strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1694 vmcmd_on_reboot[127] = 0;
1695 on_reboot_trigger.action = &vmcmd_action;
1696 return 1;
1697}
1698__setup("vmreboot=", vmcmd_on_reboot_setup);
1699
1700static int __init vmcmd_on_panic_setup(char *str)
1701{
1702 if (!MACHINE_IS_VM)
1703 return 1;
1704 strncpy_skip_quote(vmcmd_on_panic, str, 127);
1705 vmcmd_on_panic[127] = 0;
1706 on_panic_trigger.action = &vmcmd_action;
1707 return 1;
1708}
1709__setup("vmpanic=", vmcmd_on_panic_setup);
1710
1711static int __init vmcmd_on_halt_setup(char *str)
1712{
1713 if (!MACHINE_IS_VM)
1714 return 1;
1715 strncpy_skip_quote(vmcmd_on_halt, str, 127);
1716 vmcmd_on_halt[127] = 0;
1717 on_halt_trigger.action = &vmcmd_action;
1718 return 1;
1719}
1720__setup("vmhalt=", vmcmd_on_halt_setup);
1721
1722static int __init vmcmd_on_poff_setup(char *str)
1723{
1724 if (!MACHINE_IS_VM)
1725 return 1;
1726 strncpy_skip_quote(vmcmd_on_poff, str, 127);
1727 vmcmd_on_poff[127] = 0;
1728 on_poff_trigger.action = &vmcmd_action;
1729 return 1;
1730}
1731__setup("vmpoff=", vmcmd_on_poff_setup);
1732
1733static int on_panic_notify(struct notifier_block *self,
1734 unsigned long event, void *data)
1735{
1736 do_panic();
1737 return NOTIFY_OK;
1738}
1739
1740static struct notifier_block on_panic_nb = {
1741 .notifier_call = on_panic_notify,
1742 .priority = INT_MIN,
1743};
1744
1745void __init setup_ipl(void)
1746{
1747 BUILD_BUG_ON(sizeof(struct ipl_parameter_block) != PAGE_SIZE);
1748
1749 ipl_info.type = get_ipl_type();
1750 switch (ipl_info.type) {
1751 case IPL_TYPE_CCW:
1752 ipl_info.data.ccw.dev_id.ssid = ipl_block.ipl_info.ccw.ssid;
1753 ipl_info.data.ccw.dev_id.devno = ipl_block.ipl_info.ccw.devno;
1754 break;
1755 case IPL_TYPE_FCP:
1756 case IPL_TYPE_FCP_DUMP:
1757 ipl_info.data.fcp.dev_id.ssid = 0;
1758 ipl_info.data.fcp.dev_id.devno = ipl_block.ipl_info.fcp.devno;
1759 ipl_info.data.fcp.wwpn = ipl_block.ipl_info.fcp.wwpn;
1760 ipl_info.data.fcp.lun = ipl_block.ipl_info.fcp.lun;
1761 break;
1762 case IPL_TYPE_NSS:
1763 case IPL_TYPE_UNKNOWN:
1764 /* We have no info to copy */
1765 break;
1766 }
1767 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1768}
1769
1770void __init ipl_store_parameters(void)
1771{
1772 int rc;
1773
1774 rc = diag308(DIAG308_STORE, &ipl_block);
1775 if (rc == DIAG308_RC_OK && ipl_block.hdr.version <= IPL_MAX_SUPPORTED_VERSION)
1776 ipl_block_valid = 1;
1777}
1778
1779void s390_reset_system(void)
1780{
1781 /* Disable prefixing */
1782 set_prefix(0);
1783
1784 /* Disable lowcore protection */
1785 __ctl_clear_bit(0, 28);
1786 diag308_reset();
1787}
1/*
2 * arch/s390/kernel/ipl.c
3 * ipl/reipl/dump support for Linux on s390.
4 *
5 * Copyright IBM Corp. 2005,2007
6 * Author(s): Michael Holzheu <holzheu@de.ibm.com>
7 * Heiko Carstens <heiko.carstens@de.ibm.com>
8 * Volker Sameske <sameske@de.ibm.com>
9 */
10
11#include <linux/types.h>
12#include <linux/module.h>
13#include <linux/device.h>
14#include <linux/delay.h>
15#include <linux/reboot.h>
16#include <linux/ctype.h>
17#include <linux/fs.h>
18#include <linux/gfp.h>
19#include <asm/ipl.h>
20#include <asm/smp.h>
21#include <asm/setup.h>
22#include <asm/cpcmd.h>
23#include <asm/cio.h>
24#include <asm/ebcdic.h>
25#include <asm/reset.h>
26#include <asm/sclp.h>
27#include <asm/sigp.h>
28#include <asm/checksum.h>
29
30#define IPL_PARM_BLOCK_VERSION 0
31
32#define IPL_UNKNOWN_STR "unknown"
33#define IPL_CCW_STR "ccw"
34#define IPL_FCP_STR "fcp"
35#define IPL_FCP_DUMP_STR "fcp_dump"
36#define IPL_NSS_STR "nss"
37
38#define DUMP_CCW_STR "ccw"
39#define DUMP_FCP_STR "fcp"
40#define DUMP_NONE_STR "none"
41
42/*
43 * Four shutdown trigger types are supported:
44 * - panic
45 * - halt
46 * - power off
47 * - reipl
48 * - restart
49 */
50#define ON_PANIC_STR "on_panic"
51#define ON_HALT_STR "on_halt"
52#define ON_POFF_STR "on_poff"
53#define ON_REIPL_STR "on_reboot"
54#define ON_RESTART_STR "on_restart"
55
56struct shutdown_action;
57struct shutdown_trigger {
58 char *name;
59 struct shutdown_action *action;
60};
61
62/*
63 * The following shutdown action types are supported:
64 */
65#define SHUTDOWN_ACTION_IPL_STR "ipl"
66#define SHUTDOWN_ACTION_REIPL_STR "reipl"
67#define SHUTDOWN_ACTION_DUMP_STR "dump"
68#define SHUTDOWN_ACTION_VMCMD_STR "vmcmd"
69#define SHUTDOWN_ACTION_STOP_STR "stop"
70#define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl"
71
72struct shutdown_action {
73 char *name;
74 void (*fn) (struct shutdown_trigger *trigger);
75 int (*init) (void);
76 int init_rc;
77};
78
79static char *ipl_type_str(enum ipl_type type)
80{
81 switch (type) {
82 case IPL_TYPE_CCW:
83 return IPL_CCW_STR;
84 case IPL_TYPE_FCP:
85 return IPL_FCP_STR;
86 case IPL_TYPE_FCP_DUMP:
87 return IPL_FCP_DUMP_STR;
88 case IPL_TYPE_NSS:
89 return IPL_NSS_STR;
90 case IPL_TYPE_UNKNOWN:
91 default:
92 return IPL_UNKNOWN_STR;
93 }
94}
95
96enum dump_type {
97 DUMP_TYPE_NONE = 1,
98 DUMP_TYPE_CCW = 2,
99 DUMP_TYPE_FCP = 4,
100};
101
102static char *dump_type_str(enum dump_type type)
103{
104 switch (type) {
105 case DUMP_TYPE_NONE:
106 return DUMP_NONE_STR;
107 case DUMP_TYPE_CCW:
108 return DUMP_CCW_STR;
109 case DUMP_TYPE_FCP:
110 return DUMP_FCP_STR;
111 default:
112 return NULL;
113 }
114}
115
116/*
117 * Must be in data section since the bss section
118 * is not cleared when these are accessed.
119 */
120static u16 ipl_devno __attribute__((__section__(".data"))) = 0;
121u32 ipl_flags __attribute__((__section__(".data"))) = 0;
122
123enum ipl_method {
124 REIPL_METHOD_CCW_CIO,
125 REIPL_METHOD_CCW_DIAG,
126 REIPL_METHOD_CCW_VM,
127 REIPL_METHOD_FCP_RO_DIAG,
128 REIPL_METHOD_FCP_RW_DIAG,
129 REIPL_METHOD_FCP_RO_VM,
130 REIPL_METHOD_FCP_DUMP,
131 REIPL_METHOD_NSS,
132 REIPL_METHOD_NSS_DIAG,
133 REIPL_METHOD_DEFAULT,
134};
135
136enum dump_method {
137 DUMP_METHOD_NONE,
138 DUMP_METHOD_CCW_CIO,
139 DUMP_METHOD_CCW_DIAG,
140 DUMP_METHOD_CCW_VM,
141 DUMP_METHOD_FCP_DIAG,
142};
143
144static int diag308_set_works = 0;
145
146static struct ipl_parameter_block ipl_block;
147
148static int reipl_capabilities = IPL_TYPE_UNKNOWN;
149
150static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
151static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
152static struct ipl_parameter_block *reipl_block_fcp;
153static struct ipl_parameter_block *reipl_block_ccw;
154static struct ipl_parameter_block *reipl_block_nss;
155static struct ipl_parameter_block *reipl_block_actual;
156
157static int dump_capabilities = DUMP_TYPE_NONE;
158static enum dump_type dump_type = DUMP_TYPE_NONE;
159static enum dump_method dump_method = DUMP_METHOD_NONE;
160static struct ipl_parameter_block *dump_block_fcp;
161static struct ipl_parameter_block *dump_block_ccw;
162
163static struct sclp_ipl_info sclp_ipl_info;
164
165int diag308(unsigned long subcode, void *addr)
166{
167 register unsigned long _addr asm("0") = (unsigned long) addr;
168 register unsigned long _rc asm("1") = 0;
169
170 asm volatile(
171 " diag %0,%2,0x308\n"
172 "0:\n"
173 EX_TABLE(0b,0b)
174 : "+d" (_addr), "+d" (_rc)
175 : "d" (subcode) : "cc", "memory");
176 return _rc;
177}
178EXPORT_SYMBOL_GPL(diag308);
179
180/* SYSFS */
181
182#define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
183static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
184 struct kobj_attribute *attr, \
185 char *page) \
186{ \
187 return sprintf(page, _format, _value); \
188} \
189static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
190 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL);
191
192#define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
193static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
194 struct kobj_attribute *attr, \
195 char *page) \
196{ \
197 return sprintf(page, _fmt_out, \
198 (unsigned long long) _value); \
199} \
200static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
201 struct kobj_attribute *attr, \
202 const char *buf, size_t len) \
203{ \
204 unsigned long long value; \
205 if (sscanf(buf, _fmt_in, &value) != 1) \
206 return -EINVAL; \
207 _value = value; \
208 return len; \
209} \
210static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
211 __ATTR(_name,(S_IRUGO | S_IWUSR), \
212 sys_##_prefix##_##_name##_show, \
213 sys_##_prefix##_##_name##_store);
214
215#define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
216static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
217 struct kobj_attribute *attr, \
218 char *page) \
219{ \
220 return sprintf(page, _fmt_out, _value); \
221} \
222static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
223 struct kobj_attribute *attr, \
224 const char *buf, size_t len) \
225{ \
226 strncpy(_value, buf, sizeof(_value) - 1); \
227 strim(_value); \
228 return len; \
229} \
230static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
231 __ATTR(_name,(S_IRUGO | S_IWUSR), \
232 sys_##_prefix##_##_name##_show, \
233 sys_##_prefix##_##_name##_store);
234
235static void make_attrs_ro(struct attribute **attrs)
236{
237 while (*attrs) {
238 (*attrs)->mode = S_IRUGO;
239 attrs++;
240 }
241}
242
243/*
244 * ipl section
245 */
246
247static __init enum ipl_type get_ipl_type(void)
248{
249 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
250
251 if (ipl_flags & IPL_NSS_VALID)
252 return IPL_TYPE_NSS;
253 if (!(ipl_flags & IPL_DEVNO_VALID))
254 return IPL_TYPE_UNKNOWN;
255 if (!(ipl_flags & IPL_PARMBLOCK_VALID))
256 return IPL_TYPE_CCW;
257 if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
258 return IPL_TYPE_UNKNOWN;
259 if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
260 return IPL_TYPE_UNKNOWN;
261 if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
262 return IPL_TYPE_FCP_DUMP;
263 return IPL_TYPE_FCP;
264}
265
266struct ipl_info ipl_info;
267EXPORT_SYMBOL_GPL(ipl_info);
268
269static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
270 char *page)
271{
272 return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
273}
274
275static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
276
277/* VM IPL PARM routines */
278size_t reipl_get_ascii_vmparm(char *dest, size_t size,
279 const struct ipl_parameter_block *ipb)
280{
281 int i;
282 size_t len;
283 char has_lowercase = 0;
284
285 len = 0;
286 if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
287 (ipb->ipl_info.ccw.vm_parm_len > 0)) {
288
289 len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
290 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
291 /* If at least one character is lowercase, we assume mixed
292 * case; otherwise we convert everything to lowercase.
293 */
294 for (i = 0; i < len; i++)
295 if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
296 (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
297 (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
298 has_lowercase = 1;
299 break;
300 }
301 if (!has_lowercase)
302 EBC_TOLOWER(dest, len);
303 EBCASC(dest, len);
304 }
305 dest[len] = 0;
306
307 return len;
308}
309
310size_t append_ipl_vmparm(char *dest, size_t size)
311{
312 size_t rc;
313
314 rc = 0;
315 if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
316 rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
317 else
318 dest[0] = 0;
319 return rc;
320}
321
322static ssize_t ipl_vm_parm_show(struct kobject *kobj,
323 struct kobj_attribute *attr, char *page)
324{
325 char parm[DIAG308_VMPARM_SIZE + 1] = {};
326
327 append_ipl_vmparm(parm, sizeof(parm));
328 return sprintf(page, "%s\n", parm);
329}
330
331static size_t scpdata_length(const char* buf, size_t count)
332{
333 while (count) {
334 if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
335 break;
336 count--;
337 }
338 return count;
339}
340
341size_t reipl_append_ascii_scpdata(char *dest, size_t size,
342 const struct ipl_parameter_block *ipb)
343{
344 size_t count;
345 size_t i;
346 int has_lowercase;
347
348 count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data,
349 ipb->ipl_info.fcp.scp_data_len));
350 if (!count)
351 goto out;
352
353 has_lowercase = 0;
354 for (i = 0; i < count; i++) {
355 if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
356 count = 0;
357 goto out;
358 }
359 if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
360 has_lowercase = 1;
361 }
362
363 if (has_lowercase)
364 memcpy(dest, ipb->ipl_info.fcp.scp_data, count);
365 else
366 for (i = 0; i < count; i++)
367 dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]);
368out:
369 dest[count] = '\0';
370 return count;
371}
372
373size_t append_ipl_scpdata(char *dest, size_t len)
374{
375 size_t rc;
376
377 rc = 0;
378 if (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP)
379 rc = reipl_append_ascii_scpdata(dest, len, &ipl_block);
380 else
381 dest[0] = 0;
382 return rc;
383}
384
385
386static struct kobj_attribute sys_ipl_vm_parm_attr =
387 __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
388
389static ssize_t sys_ipl_device_show(struct kobject *kobj,
390 struct kobj_attribute *attr, char *page)
391{
392 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
393
394 switch (ipl_info.type) {
395 case IPL_TYPE_CCW:
396 return sprintf(page, "0.0.%04x\n", ipl_devno);
397 case IPL_TYPE_FCP:
398 case IPL_TYPE_FCP_DUMP:
399 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
400 default:
401 return 0;
402 }
403}
404
405static struct kobj_attribute sys_ipl_device_attr =
406 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
407
408static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
409 struct bin_attribute *attr, char *buf,
410 loff_t off, size_t count)
411{
412 return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START,
413 IPL_PARMBLOCK_SIZE);
414}
415
416static struct bin_attribute ipl_parameter_attr = {
417 .attr = {
418 .name = "binary_parameter",
419 .mode = S_IRUGO,
420 },
421 .size = PAGE_SIZE,
422 .read = &ipl_parameter_read,
423};
424
425static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
426 struct bin_attribute *attr, char *buf,
427 loff_t off, size_t count)
428{
429 unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
430 void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
431
432 return memory_read_from_buffer(buf, count, &off, scp_data, size);
433}
434
435static struct bin_attribute ipl_scp_data_attr = {
436 .attr = {
437 .name = "scp_data",
438 .mode = S_IRUGO,
439 },
440 .size = PAGE_SIZE,
441 .read = ipl_scp_data_read,
442};
443
444/* FCP ipl device attributes */
445
446DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
447 IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
448DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
449 IPL_PARMBLOCK_START->ipl_info.fcp.lun);
450DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
451 IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
452DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
453 IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
454
455static struct attribute *ipl_fcp_attrs[] = {
456 &sys_ipl_type_attr.attr,
457 &sys_ipl_device_attr.attr,
458 &sys_ipl_fcp_wwpn_attr.attr,
459 &sys_ipl_fcp_lun_attr.attr,
460 &sys_ipl_fcp_bootprog_attr.attr,
461 &sys_ipl_fcp_br_lba_attr.attr,
462 NULL,
463};
464
465static struct attribute_group ipl_fcp_attr_group = {
466 .attrs = ipl_fcp_attrs,
467};
468
469/* CCW ipl device attributes */
470
471static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
472 struct kobj_attribute *attr, char *page)
473{
474 char loadparm[LOADPARM_LEN + 1] = {};
475
476 if (!sclp_ipl_info.is_valid)
477 return sprintf(page, "#unknown#\n");
478 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
479 EBCASC(loadparm, LOADPARM_LEN);
480 strim(loadparm);
481 return sprintf(page, "%s\n", loadparm);
482}
483
484static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
485 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
486
487static struct attribute *ipl_ccw_attrs_vm[] = {
488 &sys_ipl_type_attr.attr,
489 &sys_ipl_device_attr.attr,
490 &sys_ipl_ccw_loadparm_attr.attr,
491 &sys_ipl_vm_parm_attr.attr,
492 NULL,
493};
494
495static struct attribute *ipl_ccw_attrs_lpar[] = {
496 &sys_ipl_type_attr.attr,
497 &sys_ipl_device_attr.attr,
498 &sys_ipl_ccw_loadparm_attr.attr,
499 NULL,
500};
501
502static struct attribute_group ipl_ccw_attr_group_vm = {
503 .attrs = ipl_ccw_attrs_vm,
504};
505
506static struct attribute_group ipl_ccw_attr_group_lpar = {
507 .attrs = ipl_ccw_attrs_lpar
508};
509
510/* NSS ipl device attributes */
511
512DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
513
514static struct attribute *ipl_nss_attrs[] = {
515 &sys_ipl_type_attr.attr,
516 &sys_ipl_nss_name_attr.attr,
517 &sys_ipl_ccw_loadparm_attr.attr,
518 &sys_ipl_vm_parm_attr.attr,
519 NULL,
520};
521
522static struct attribute_group ipl_nss_attr_group = {
523 .attrs = ipl_nss_attrs,
524};
525
526/* UNKNOWN ipl device attributes */
527
528static struct attribute *ipl_unknown_attrs[] = {
529 &sys_ipl_type_attr.attr,
530 NULL,
531};
532
533static struct attribute_group ipl_unknown_attr_group = {
534 .attrs = ipl_unknown_attrs,
535};
536
537static struct kset *ipl_kset;
538
539static int __init ipl_register_fcp_files(void)
540{
541 int rc;
542
543 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
544 if (rc)
545 goto out;
546 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
547 if (rc)
548 goto out_ipl_parm;
549 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_scp_data_attr);
550 if (!rc)
551 goto out;
552
553 sysfs_remove_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
554
555out_ipl_parm:
556 sysfs_remove_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
557out:
558 return rc;
559}
560
561static void __ipl_run(void *unused)
562{
563 diag308(DIAG308_IPL, NULL);
564 if (MACHINE_IS_VM)
565 __cpcmd("IPL", NULL, 0, NULL);
566 else if (ipl_info.type == IPL_TYPE_CCW)
567 reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
568}
569
570static void ipl_run(struct shutdown_trigger *trigger)
571{
572 smp_switch_to_ipl_cpu(__ipl_run, NULL);
573}
574
575static int __init ipl_init(void)
576{
577 int rc;
578
579 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
580 if (!ipl_kset) {
581 rc = -ENOMEM;
582 goto out;
583 }
584 switch (ipl_info.type) {
585 case IPL_TYPE_CCW:
586 if (MACHINE_IS_VM)
587 rc = sysfs_create_group(&ipl_kset->kobj,
588 &ipl_ccw_attr_group_vm);
589 else
590 rc = sysfs_create_group(&ipl_kset->kobj,
591 &ipl_ccw_attr_group_lpar);
592 break;
593 case IPL_TYPE_FCP:
594 case IPL_TYPE_FCP_DUMP:
595 rc = ipl_register_fcp_files();
596 break;
597 case IPL_TYPE_NSS:
598 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group);
599 break;
600 default:
601 rc = sysfs_create_group(&ipl_kset->kobj,
602 &ipl_unknown_attr_group);
603 break;
604 }
605out:
606 if (rc)
607 panic("ipl_init failed: rc = %i\n", rc);
608
609 return 0;
610}
611
612static struct shutdown_action __refdata ipl_action = {
613 .name = SHUTDOWN_ACTION_IPL_STR,
614 .fn = ipl_run,
615 .init = ipl_init,
616};
617
618/*
619 * reipl shutdown action: Reboot Linux on shutdown.
620 */
621
622/* VM IPL PARM attributes */
623static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
624 char *page)
625{
626 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
627
628 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
629 return sprintf(page, "%s\n", vmparm);
630}
631
632static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
633 size_t vmparm_max,
634 const char *buf, size_t len)
635{
636 int i, ip_len;
637
638 /* ignore trailing newline */
639 ip_len = len;
640 if ((len > 0) && (buf[len - 1] == '\n'))
641 ip_len--;
642
643 if (ip_len > vmparm_max)
644 return -EINVAL;
645
646 /* parm is used to store kernel options, check for common chars */
647 for (i = 0; i < ip_len; i++)
648 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
649 return -EINVAL;
650
651 memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
652 ipb->ipl_info.ccw.vm_parm_len = ip_len;
653 if (ip_len > 0) {
654 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
655 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
656 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
657 } else {
658 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
659 }
660
661 return len;
662}
663
664/* NSS wrapper */
665static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
666 struct kobj_attribute *attr, char *page)
667{
668 return reipl_generic_vmparm_show(reipl_block_nss, page);
669}
670
671static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
672 struct kobj_attribute *attr,
673 const char *buf, size_t len)
674{
675 return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
676}
677
678/* CCW wrapper */
679static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
680 struct kobj_attribute *attr, char *page)
681{
682 return reipl_generic_vmparm_show(reipl_block_ccw, page);
683}
684
685static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
686 struct kobj_attribute *attr,
687 const char *buf, size_t len)
688{
689 return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
690}
691
692static struct kobj_attribute sys_reipl_nss_vmparm_attr =
693 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
694 reipl_nss_vmparm_store);
695static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
696 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
697 reipl_ccw_vmparm_store);
698
699/* FCP reipl device attributes */
700
701static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
702 struct bin_attribute *attr,
703 char *buf, loff_t off, size_t count)
704{
705 size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
706 void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
707
708 return memory_read_from_buffer(buf, count, &off, scp_data, size);
709}
710
711static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
712 struct bin_attribute *attr,
713 char *buf, loff_t off, size_t count)
714{
715 size_t padding;
716 size_t scpdata_len;
717
718 if (off < 0)
719 return -EINVAL;
720
721 if (off >= DIAG308_SCPDATA_SIZE)
722 return -ENOSPC;
723
724 if (count > DIAG308_SCPDATA_SIZE - off)
725 count = DIAG308_SCPDATA_SIZE - off;
726
727 memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf + off, count);
728 scpdata_len = off + count;
729
730 if (scpdata_len % 8) {
731 padding = 8 - (scpdata_len % 8);
732 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
733 0, padding);
734 scpdata_len += padding;
735 }
736
737 reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
738 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
739 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
740
741 return count;
742}
743
744static struct bin_attribute sys_reipl_fcp_scp_data_attr = {
745 .attr = {
746 .name = "scp_data",
747 .mode = S_IRUGO | S_IWUSR,
748 },
749 .size = PAGE_SIZE,
750 .read = reipl_fcp_scpdata_read,
751 .write = reipl_fcp_scpdata_write,
752};
753
754DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n",
755 reipl_block_fcp->ipl_info.fcp.wwpn);
756DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n",
757 reipl_block_fcp->ipl_info.fcp.lun);
758DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
759 reipl_block_fcp->ipl_info.fcp.bootprog);
760DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
761 reipl_block_fcp->ipl_info.fcp.br_lba);
762DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
763 reipl_block_fcp->ipl_info.fcp.devno);
764
765static struct attribute *reipl_fcp_attrs[] = {
766 &sys_reipl_fcp_device_attr.attr,
767 &sys_reipl_fcp_wwpn_attr.attr,
768 &sys_reipl_fcp_lun_attr.attr,
769 &sys_reipl_fcp_bootprog_attr.attr,
770 &sys_reipl_fcp_br_lba_attr.attr,
771 NULL,
772};
773
774static struct attribute_group reipl_fcp_attr_group = {
775 .attrs = reipl_fcp_attrs,
776};
777
778/* CCW reipl device attributes */
779
780DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
781 reipl_block_ccw->ipl_info.ccw.devno);
782
783static void reipl_get_ascii_loadparm(char *loadparm,
784 struct ipl_parameter_block *ibp)
785{
786 memcpy(loadparm, ibp->ipl_info.ccw.load_parm, LOADPARM_LEN);
787 EBCASC(loadparm, LOADPARM_LEN);
788 loadparm[LOADPARM_LEN] = 0;
789 strim(loadparm);
790}
791
792static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
793 char *page)
794{
795 char buf[LOADPARM_LEN + 1];
796
797 reipl_get_ascii_loadparm(buf, ipb);
798 return sprintf(page, "%s\n", buf);
799}
800
801static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
802 const char *buf, size_t len)
803{
804 int i, lp_len;
805
806 /* ignore trailing newline */
807 lp_len = len;
808 if ((len > 0) && (buf[len - 1] == '\n'))
809 lp_len--;
810 /* loadparm can have max 8 characters and must not start with a blank */
811 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
812 return -EINVAL;
813 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
814 for (i = 0; i < lp_len; i++) {
815 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
816 (buf[i] == '.'))
817 continue;
818 return -EINVAL;
819 }
820 /* initialize loadparm with blanks */
821 memset(ipb->ipl_info.ccw.load_parm, ' ', LOADPARM_LEN);
822 /* copy and convert to ebcdic */
823 memcpy(ipb->ipl_info.ccw.load_parm, buf, lp_len);
824 ASCEBC(ipb->ipl_info.ccw.load_parm, LOADPARM_LEN);
825 return len;
826}
827
828/* NSS wrapper */
829static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
830 struct kobj_attribute *attr, char *page)
831{
832 return reipl_generic_loadparm_show(reipl_block_nss, page);
833}
834
835static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
836 struct kobj_attribute *attr,
837 const char *buf, size_t len)
838{
839 return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
840}
841
842/* CCW wrapper */
843static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
844 struct kobj_attribute *attr, char *page)
845{
846 return reipl_generic_loadparm_show(reipl_block_ccw, page);
847}
848
849static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
850 struct kobj_attribute *attr,
851 const char *buf, size_t len)
852{
853 return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
854}
855
856static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
857 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
858 reipl_ccw_loadparm_store);
859
860static struct attribute *reipl_ccw_attrs_vm[] = {
861 &sys_reipl_ccw_device_attr.attr,
862 &sys_reipl_ccw_loadparm_attr.attr,
863 &sys_reipl_ccw_vmparm_attr.attr,
864 NULL,
865};
866
867static struct attribute *reipl_ccw_attrs_lpar[] = {
868 &sys_reipl_ccw_device_attr.attr,
869 &sys_reipl_ccw_loadparm_attr.attr,
870 NULL,
871};
872
873static struct attribute_group reipl_ccw_attr_group_vm = {
874 .name = IPL_CCW_STR,
875 .attrs = reipl_ccw_attrs_vm,
876};
877
878static struct attribute_group reipl_ccw_attr_group_lpar = {
879 .name = IPL_CCW_STR,
880 .attrs = reipl_ccw_attrs_lpar,
881};
882
883
884/* NSS reipl device attributes */
885static void reipl_get_ascii_nss_name(char *dst,
886 struct ipl_parameter_block *ipb)
887{
888 memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
889 EBCASC(dst, NSS_NAME_SIZE);
890 dst[NSS_NAME_SIZE] = 0;
891}
892
893static ssize_t reipl_nss_name_show(struct kobject *kobj,
894 struct kobj_attribute *attr, char *page)
895{
896 char nss_name[NSS_NAME_SIZE + 1] = {};
897
898 reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
899 return sprintf(page, "%s\n", nss_name);
900}
901
902static ssize_t reipl_nss_name_store(struct kobject *kobj,
903 struct kobj_attribute *attr,
904 const char *buf, size_t len)
905{
906 int nss_len;
907
908 /* ignore trailing newline */
909 nss_len = len;
910 if ((len > 0) && (buf[len - 1] == '\n'))
911 nss_len--;
912
913 if (nss_len > NSS_NAME_SIZE)
914 return -EINVAL;
915
916 memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
917 if (nss_len > 0) {
918 reipl_block_nss->ipl_info.ccw.vm_flags |=
919 DIAG308_VM_FLAGS_NSS_VALID;
920 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
921 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
922 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
923 } else {
924 reipl_block_nss->ipl_info.ccw.vm_flags &=
925 ~DIAG308_VM_FLAGS_NSS_VALID;
926 }
927
928 return len;
929}
930
931static struct kobj_attribute sys_reipl_nss_name_attr =
932 __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
933 reipl_nss_name_store);
934
935static struct kobj_attribute sys_reipl_nss_loadparm_attr =
936 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
937 reipl_nss_loadparm_store);
938
939static struct attribute *reipl_nss_attrs[] = {
940 &sys_reipl_nss_name_attr.attr,
941 &sys_reipl_nss_loadparm_attr.attr,
942 &sys_reipl_nss_vmparm_attr.attr,
943 NULL,
944};
945
946static struct attribute_group reipl_nss_attr_group = {
947 .name = IPL_NSS_STR,
948 .attrs = reipl_nss_attrs,
949};
950
951/* reipl type */
952
953static int reipl_set_type(enum ipl_type type)
954{
955 if (!(reipl_capabilities & type))
956 return -EINVAL;
957
958 switch(type) {
959 case IPL_TYPE_CCW:
960 if (diag308_set_works)
961 reipl_method = REIPL_METHOD_CCW_DIAG;
962 else if (MACHINE_IS_VM)
963 reipl_method = REIPL_METHOD_CCW_VM;
964 else
965 reipl_method = REIPL_METHOD_CCW_CIO;
966 reipl_block_actual = reipl_block_ccw;
967 break;
968 case IPL_TYPE_FCP:
969 if (diag308_set_works)
970 reipl_method = REIPL_METHOD_FCP_RW_DIAG;
971 else if (MACHINE_IS_VM)
972 reipl_method = REIPL_METHOD_FCP_RO_VM;
973 else
974 reipl_method = REIPL_METHOD_FCP_RO_DIAG;
975 reipl_block_actual = reipl_block_fcp;
976 break;
977 case IPL_TYPE_FCP_DUMP:
978 reipl_method = REIPL_METHOD_FCP_DUMP;
979 break;
980 case IPL_TYPE_NSS:
981 if (diag308_set_works)
982 reipl_method = REIPL_METHOD_NSS_DIAG;
983 else
984 reipl_method = REIPL_METHOD_NSS;
985 reipl_block_actual = reipl_block_nss;
986 break;
987 case IPL_TYPE_UNKNOWN:
988 reipl_method = REIPL_METHOD_DEFAULT;
989 break;
990 default:
991 BUG();
992 }
993 reipl_type = type;
994 return 0;
995}
996
997static ssize_t reipl_type_show(struct kobject *kobj,
998 struct kobj_attribute *attr, char *page)
999{
1000 return sprintf(page, "%s\n", ipl_type_str(reipl_type));
1001}
1002
1003static ssize_t reipl_type_store(struct kobject *kobj,
1004 struct kobj_attribute *attr,
1005 const char *buf, size_t len)
1006{
1007 int rc = -EINVAL;
1008
1009 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1010 rc = reipl_set_type(IPL_TYPE_CCW);
1011 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1012 rc = reipl_set_type(IPL_TYPE_FCP);
1013 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1014 rc = reipl_set_type(IPL_TYPE_NSS);
1015 return (rc != 0) ? rc : len;
1016}
1017
1018static struct kobj_attribute reipl_type_attr =
1019 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
1020
1021static struct kset *reipl_kset;
1022static struct kset *reipl_fcp_kset;
1023
1024static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
1025 const enum ipl_method m)
1026{
1027 char loadparm[LOADPARM_LEN + 1] = {};
1028 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
1029 char nss_name[NSS_NAME_SIZE + 1] = {};
1030 size_t pos = 0;
1031
1032 reipl_get_ascii_loadparm(loadparm, ipb);
1033 reipl_get_ascii_nss_name(nss_name, ipb);
1034 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
1035
1036 switch (m) {
1037 case REIPL_METHOD_CCW_VM:
1038 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
1039 break;
1040 case REIPL_METHOD_NSS:
1041 pos = sprintf(dst, "IPL %s", nss_name);
1042 break;
1043 default:
1044 break;
1045 }
1046 if (strlen(loadparm) > 0)
1047 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
1048 if (strlen(vmparm) > 0)
1049 sprintf(dst + pos, " PARM %s", vmparm);
1050}
1051
1052static void __reipl_run(void *unused)
1053{
1054 struct ccw_dev_id devid;
1055 static char buf[128];
1056
1057 switch (reipl_method) {
1058 case REIPL_METHOD_CCW_CIO:
1059 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
1060 devid.ssid = 0;
1061 reipl_ccw_dev(&devid);
1062 break;
1063 case REIPL_METHOD_CCW_VM:
1064 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
1065 __cpcmd(buf, NULL, 0, NULL);
1066 break;
1067 case REIPL_METHOD_CCW_DIAG:
1068 diag308(DIAG308_SET, reipl_block_ccw);
1069 diag308(DIAG308_IPL, NULL);
1070 break;
1071 case REIPL_METHOD_FCP_RW_DIAG:
1072 diag308(DIAG308_SET, reipl_block_fcp);
1073 diag308(DIAG308_IPL, NULL);
1074 break;
1075 case REIPL_METHOD_FCP_RO_DIAG:
1076 diag308(DIAG308_IPL, NULL);
1077 break;
1078 case REIPL_METHOD_FCP_RO_VM:
1079 __cpcmd("IPL", NULL, 0, NULL);
1080 break;
1081 case REIPL_METHOD_NSS_DIAG:
1082 diag308(DIAG308_SET, reipl_block_nss);
1083 diag308(DIAG308_IPL, NULL);
1084 break;
1085 case REIPL_METHOD_NSS:
1086 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
1087 __cpcmd(buf, NULL, 0, NULL);
1088 break;
1089 case REIPL_METHOD_DEFAULT:
1090 if (MACHINE_IS_VM)
1091 __cpcmd("IPL", NULL, 0, NULL);
1092 diag308(DIAG308_IPL, NULL);
1093 break;
1094 case REIPL_METHOD_FCP_DUMP:
1095 break;
1096 }
1097 disabled_wait((unsigned long) __builtin_return_address(0));
1098}
1099
1100static void reipl_run(struct shutdown_trigger *trigger)
1101{
1102 smp_switch_to_ipl_cpu(__reipl_run, NULL);
1103}
1104
1105static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
1106{
1107 ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
1108 ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1109 ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1110 ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1111}
1112
1113static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1114{
1115 /* LOADPARM */
1116 /* check if read scp info worked and set loadparm */
1117 if (sclp_ipl_info.is_valid)
1118 memcpy(ipb->ipl_info.ccw.load_parm,
1119 &sclp_ipl_info.loadparm, LOADPARM_LEN);
1120 else
1121 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1122 memset(ipb->ipl_info.ccw.load_parm, 0x40, LOADPARM_LEN);
1123 ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
1124
1125 /* VM PARM */
1126 if (MACHINE_IS_VM && diag308_set_works &&
1127 (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1128
1129 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1130 ipb->ipl_info.ccw.vm_parm_len =
1131 ipl_block.ipl_info.ccw.vm_parm_len;
1132 memcpy(ipb->ipl_info.ccw.vm_parm,
1133 ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1134 }
1135}
1136
1137static int __init reipl_nss_init(void)
1138{
1139 int rc;
1140
1141 if (!MACHINE_IS_VM)
1142 return 0;
1143
1144 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1145 if (!reipl_block_nss)
1146 return -ENOMEM;
1147
1148 if (!diag308_set_works)
1149 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO;
1150
1151 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1152 if (rc)
1153 return rc;
1154
1155 reipl_block_ccw_init(reipl_block_nss);
1156 if (ipl_info.type == IPL_TYPE_NSS) {
1157 memset(reipl_block_nss->ipl_info.ccw.nss_name,
1158 ' ', NSS_NAME_SIZE);
1159 memcpy(reipl_block_nss->ipl_info.ccw.nss_name,
1160 kernel_nss_name, strlen(kernel_nss_name));
1161 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
1162 reipl_block_nss->ipl_info.ccw.vm_flags |=
1163 DIAG308_VM_FLAGS_NSS_VALID;
1164
1165 reipl_block_ccw_fill_parms(reipl_block_nss);
1166 }
1167
1168 reipl_capabilities |= IPL_TYPE_NSS;
1169 return 0;
1170}
1171
1172static int __init reipl_ccw_init(void)
1173{
1174 int rc;
1175
1176 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1177 if (!reipl_block_ccw)
1178 return -ENOMEM;
1179
1180 if (MACHINE_IS_VM) {
1181 if (!diag308_set_works)
1182 sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
1183 rc = sysfs_create_group(&reipl_kset->kobj,
1184 &reipl_ccw_attr_group_vm);
1185 } else {
1186 if(!diag308_set_works)
1187 sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
1188 rc = sysfs_create_group(&reipl_kset->kobj,
1189 &reipl_ccw_attr_group_lpar);
1190 }
1191 if (rc)
1192 return rc;
1193
1194 reipl_block_ccw_init(reipl_block_ccw);
1195 if (ipl_info.type == IPL_TYPE_CCW) {
1196 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
1197 reipl_block_ccw_fill_parms(reipl_block_ccw);
1198 }
1199
1200 reipl_capabilities |= IPL_TYPE_CCW;
1201 return 0;
1202}
1203
1204static int __init reipl_fcp_init(void)
1205{
1206 int rc;
1207
1208 if (!diag308_set_works) {
1209 if (ipl_info.type == IPL_TYPE_FCP) {
1210 make_attrs_ro(reipl_fcp_attrs);
1211 sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO;
1212 } else
1213 return 0;
1214 }
1215
1216 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1217 if (!reipl_block_fcp)
1218 return -ENOMEM;
1219
1220 /* sysfs: create fcp kset for mixing attr group and bin attrs */
1221 reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1222 &reipl_kset->kobj);
1223 if (!reipl_fcp_kset) {
1224 free_page((unsigned long) reipl_block_fcp);
1225 return -ENOMEM;
1226 }
1227
1228 rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1229 if (rc) {
1230 kset_unregister(reipl_fcp_kset);
1231 free_page((unsigned long) reipl_block_fcp);
1232 return rc;
1233 }
1234
1235 rc = sysfs_create_bin_file(&reipl_fcp_kset->kobj,
1236 &sys_reipl_fcp_scp_data_attr);
1237 if (rc) {
1238 sysfs_remove_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1239 kset_unregister(reipl_fcp_kset);
1240 free_page((unsigned long) reipl_block_fcp);
1241 return rc;
1242 }
1243
1244 if (ipl_info.type == IPL_TYPE_FCP)
1245 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
1246 else {
1247 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1248 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1249 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1250 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1251 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1252 }
1253 reipl_capabilities |= IPL_TYPE_FCP;
1254 return 0;
1255}
1256
1257static int __init reipl_init(void)
1258{
1259 int rc;
1260
1261 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1262 if (!reipl_kset)
1263 return -ENOMEM;
1264 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1265 if (rc) {
1266 kset_unregister(reipl_kset);
1267 return rc;
1268 }
1269 rc = reipl_ccw_init();
1270 if (rc)
1271 return rc;
1272 rc = reipl_fcp_init();
1273 if (rc)
1274 return rc;
1275 rc = reipl_nss_init();
1276 if (rc)
1277 return rc;
1278 rc = reipl_set_type(ipl_info.type);
1279 if (rc)
1280 return rc;
1281 return 0;
1282}
1283
1284static struct shutdown_action __refdata reipl_action = {
1285 .name = SHUTDOWN_ACTION_REIPL_STR,
1286 .fn = reipl_run,
1287 .init = reipl_init,
1288};
1289
1290/*
1291 * dump shutdown action: Dump Linux on shutdown.
1292 */
1293
1294/* FCP dump device attributes */
1295
1296DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n",
1297 dump_block_fcp->ipl_info.fcp.wwpn);
1298DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n",
1299 dump_block_fcp->ipl_info.fcp.lun);
1300DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1301 dump_block_fcp->ipl_info.fcp.bootprog);
1302DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1303 dump_block_fcp->ipl_info.fcp.br_lba);
1304DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1305 dump_block_fcp->ipl_info.fcp.devno);
1306
1307static struct attribute *dump_fcp_attrs[] = {
1308 &sys_dump_fcp_device_attr.attr,
1309 &sys_dump_fcp_wwpn_attr.attr,
1310 &sys_dump_fcp_lun_attr.attr,
1311 &sys_dump_fcp_bootprog_attr.attr,
1312 &sys_dump_fcp_br_lba_attr.attr,
1313 NULL,
1314};
1315
1316static struct attribute_group dump_fcp_attr_group = {
1317 .name = IPL_FCP_STR,
1318 .attrs = dump_fcp_attrs,
1319};
1320
1321/* CCW dump device attributes */
1322
1323DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
1324 dump_block_ccw->ipl_info.ccw.devno);
1325
1326static struct attribute *dump_ccw_attrs[] = {
1327 &sys_dump_ccw_device_attr.attr,
1328 NULL,
1329};
1330
1331static struct attribute_group dump_ccw_attr_group = {
1332 .name = IPL_CCW_STR,
1333 .attrs = dump_ccw_attrs,
1334};
1335
1336/* dump type */
1337
1338static int dump_set_type(enum dump_type type)
1339{
1340 if (!(dump_capabilities & type))
1341 return -EINVAL;
1342 switch (type) {
1343 case DUMP_TYPE_CCW:
1344 if (diag308_set_works)
1345 dump_method = DUMP_METHOD_CCW_DIAG;
1346 else if (MACHINE_IS_VM)
1347 dump_method = DUMP_METHOD_CCW_VM;
1348 else
1349 dump_method = DUMP_METHOD_CCW_CIO;
1350 break;
1351 case DUMP_TYPE_FCP:
1352 dump_method = DUMP_METHOD_FCP_DIAG;
1353 break;
1354 default:
1355 dump_method = DUMP_METHOD_NONE;
1356 }
1357 dump_type = type;
1358 return 0;
1359}
1360
1361static ssize_t dump_type_show(struct kobject *kobj,
1362 struct kobj_attribute *attr, char *page)
1363{
1364 return sprintf(page, "%s\n", dump_type_str(dump_type));
1365}
1366
1367static ssize_t dump_type_store(struct kobject *kobj,
1368 struct kobj_attribute *attr,
1369 const char *buf, size_t len)
1370{
1371 int rc = -EINVAL;
1372
1373 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1374 rc = dump_set_type(DUMP_TYPE_NONE);
1375 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1376 rc = dump_set_type(DUMP_TYPE_CCW);
1377 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1378 rc = dump_set_type(DUMP_TYPE_FCP);
1379 return (rc != 0) ? rc : len;
1380}
1381
1382static struct kobj_attribute dump_type_attr =
1383 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1384
1385static struct kset *dump_kset;
1386
1387static void __dump_run(void *unused)
1388{
1389 struct ccw_dev_id devid;
1390 static char buf[100];
1391
1392 switch (dump_method) {
1393 case DUMP_METHOD_CCW_CIO:
1394 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
1395 devid.ssid = 0;
1396 reipl_ccw_dev(&devid);
1397 break;
1398 case DUMP_METHOD_CCW_VM:
1399 sprintf(buf, "STORE STATUS");
1400 __cpcmd(buf, NULL, 0, NULL);
1401 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
1402 __cpcmd(buf, NULL, 0, NULL);
1403 break;
1404 case DUMP_METHOD_CCW_DIAG:
1405 diag308(DIAG308_SET, dump_block_ccw);
1406 diag308(DIAG308_DUMP, NULL);
1407 break;
1408 case DUMP_METHOD_FCP_DIAG:
1409 diag308(DIAG308_SET, dump_block_fcp);
1410 diag308(DIAG308_DUMP, NULL);
1411 break;
1412 default:
1413 break;
1414 }
1415}
1416
1417static void dump_run(struct shutdown_trigger *trigger)
1418{
1419 if (dump_method == DUMP_METHOD_NONE)
1420 return;
1421 smp_send_stop();
1422 smp_switch_to_ipl_cpu(__dump_run, NULL);
1423}
1424
1425static int __init dump_ccw_init(void)
1426{
1427 int rc;
1428
1429 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1430 if (!dump_block_ccw)
1431 return -ENOMEM;
1432 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1433 if (rc) {
1434 free_page((unsigned long)dump_block_ccw);
1435 return rc;
1436 }
1437 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1438 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1439 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1440 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1441 dump_capabilities |= DUMP_TYPE_CCW;
1442 return 0;
1443}
1444
1445static int __init dump_fcp_init(void)
1446{
1447 int rc;
1448
1449 if (!sclp_ipl_info.has_dump)
1450 return 0; /* LDIPL DUMP is not installed */
1451 if (!diag308_set_works)
1452 return 0;
1453 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1454 if (!dump_block_fcp)
1455 return -ENOMEM;
1456 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1457 if (rc) {
1458 free_page((unsigned long)dump_block_fcp);
1459 return rc;
1460 }
1461 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1462 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1463 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1464 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1465 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1466 dump_capabilities |= DUMP_TYPE_FCP;
1467 return 0;
1468}
1469
1470static int __init dump_init(void)
1471{
1472 int rc;
1473
1474 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1475 if (!dump_kset)
1476 return -ENOMEM;
1477 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1478 if (rc) {
1479 kset_unregister(dump_kset);
1480 return rc;
1481 }
1482 rc = dump_ccw_init();
1483 if (rc)
1484 return rc;
1485 rc = dump_fcp_init();
1486 if (rc)
1487 return rc;
1488 dump_set_type(DUMP_TYPE_NONE);
1489 return 0;
1490}
1491
1492static struct shutdown_action __refdata dump_action = {
1493 .name = SHUTDOWN_ACTION_DUMP_STR,
1494 .fn = dump_run,
1495 .init = dump_init,
1496};
1497
1498static void dump_reipl_run(struct shutdown_trigger *trigger)
1499{
1500 preempt_disable();
1501 /*
1502 * Bypass dynamic address translation (DAT) when storing IPL parameter
1503 * information block address and checksum into the prefix area
1504 * (corresponding to absolute addresses 0-8191).
1505 * When enhanced DAT applies and the STE format control in one,
1506 * the absolute address is formed without prefixing. In this case a
1507 * normal store (stg/st) into the prefix area would no more match to
1508 * absolute addresses 0-8191.
1509 */
1510#ifdef CONFIG_64BIT
1511 asm volatile("sturg %0,%1"
1512 :: "a" ((unsigned long) reipl_block_actual),
1513 "a" (&lowcore_ptr[smp_processor_id()]->ipib));
1514#else
1515 asm volatile("stura %0,%1"
1516 :: "a" ((unsigned long) reipl_block_actual),
1517 "a" (&lowcore_ptr[smp_processor_id()]->ipib));
1518#endif
1519 asm volatile("stura %0,%1"
1520 :: "a" (csum_partial(reipl_block_actual,
1521 reipl_block_actual->hdr.len, 0)),
1522 "a" (&lowcore_ptr[smp_processor_id()]->ipib_checksum));
1523 preempt_enable();
1524 dump_run(trigger);
1525}
1526
1527static int __init dump_reipl_init(void)
1528{
1529 if (!diag308_set_works)
1530 return -EOPNOTSUPP;
1531 else
1532 return 0;
1533}
1534
1535static struct shutdown_action __refdata dump_reipl_action = {
1536 .name = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1537 .fn = dump_reipl_run,
1538 .init = dump_reipl_init,
1539};
1540
1541/*
1542 * vmcmd shutdown action: Trigger vm command on shutdown.
1543 */
1544
1545static char vmcmd_on_reboot[128];
1546static char vmcmd_on_panic[128];
1547static char vmcmd_on_halt[128];
1548static char vmcmd_on_poff[128];
1549static char vmcmd_on_restart[128];
1550
1551DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1552DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1553DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1554DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1555DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1556
1557static struct attribute *vmcmd_attrs[] = {
1558 &sys_vmcmd_on_reboot_attr.attr,
1559 &sys_vmcmd_on_panic_attr.attr,
1560 &sys_vmcmd_on_halt_attr.attr,
1561 &sys_vmcmd_on_poff_attr.attr,
1562 &sys_vmcmd_on_restart_attr.attr,
1563 NULL,
1564};
1565
1566static struct attribute_group vmcmd_attr_group = {
1567 .attrs = vmcmd_attrs,
1568};
1569
1570static struct kset *vmcmd_kset;
1571
1572static void vmcmd_run(struct shutdown_trigger *trigger)
1573{
1574 char *cmd, *next_cmd;
1575
1576 if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1577 cmd = vmcmd_on_reboot;
1578 else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1579 cmd = vmcmd_on_panic;
1580 else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1581 cmd = vmcmd_on_halt;
1582 else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1583 cmd = vmcmd_on_poff;
1584 else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
1585 cmd = vmcmd_on_restart;
1586 else
1587 return;
1588
1589 if (strlen(cmd) == 0)
1590 return;
1591 do {
1592 next_cmd = strchr(cmd, '\n');
1593 if (next_cmd) {
1594 next_cmd[0] = 0;
1595 next_cmd += 1;
1596 }
1597 __cpcmd(cmd, NULL, 0, NULL);
1598 cmd = next_cmd;
1599 } while (cmd != NULL);
1600}
1601
1602static int vmcmd_init(void)
1603{
1604 if (!MACHINE_IS_VM)
1605 return -EOPNOTSUPP;
1606 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1607 if (!vmcmd_kset)
1608 return -ENOMEM;
1609 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1610}
1611
1612static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1613 vmcmd_run, vmcmd_init};
1614
1615/*
1616 * stop shutdown action: Stop Linux on shutdown.
1617 */
1618
1619static void stop_run(struct shutdown_trigger *trigger)
1620{
1621 if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
1622 strcmp(trigger->name, ON_RESTART_STR) == 0)
1623 disabled_wait((unsigned long) __builtin_return_address(0));
1624 while (sigp(smp_processor_id(), sigp_stop) == sigp_busy)
1625 cpu_relax();
1626 for (;;);
1627}
1628
1629static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1630 stop_run, NULL};
1631
1632/* action list */
1633
1634static struct shutdown_action *shutdown_actions_list[] = {
1635 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1636 &vmcmd_action, &stop_action};
1637#define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1638
1639/*
1640 * Trigger section
1641 */
1642
1643static struct kset *shutdown_actions_kset;
1644
1645static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1646 size_t len)
1647{
1648 int i;
1649
1650 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1651 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1652 if (shutdown_actions_list[i]->init_rc) {
1653 return shutdown_actions_list[i]->init_rc;
1654 } else {
1655 trigger->action = shutdown_actions_list[i];
1656 return len;
1657 }
1658 }
1659 }
1660 return -EINVAL;
1661}
1662
1663/* on reipl */
1664
1665static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1666 &reipl_action};
1667
1668static ssize_t on_reboot_show(struct kobject *kobj,
1669 struct kobj_attribute *attr, char *page)
1670{
1671 return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1672}
1673
1674static ssize_t on_reboot_store(struct kobject *kobj,
1675 struct kobj_attribute *attr,
1676 const char *buf, size_t len)
1677{
1678 return set_trigger(buf, &on_reboot_trigger, len);
1679}
1680
1681static struct kobj_attribute on_reboot_attr =
1682 __ATTR(on_reboot, 0644, on_reboot_show, on_reboot_store);
1683
1684static void do_machine_restart(char *__unused)
1685{
1686 smp_send_stop();
1687 on_reboot_trigger.action->fn(&on_reboot_trigger);
1688 reipl_run(NULL);
1689}
1690void (*_machine_restart)(char *command) = do_machine_restart;
1691
1692/* on panic */
1693
1694static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1695
1696static ssize_t on_panic_show(struct kobject *kobj,
1697 struct kobj_attribute *attr, char *page)
1698{
1699 return sprintf(page, "%s\n", on_panic_trigger.action->name);
1700}
1701
1702static ssize_t on_panic_store(struct kobject *kobj,
1703 struct kobj_attribute *attr,
1704 const char *buf, size_t len)
1705{
1706 return set_trigger(buf, &on_panic_trigger, len);
1707}
1708
1709static struct kobj_attribute on_panic_attr =
1710 __ATTR(on_panic, 0644, on_panic_show, on_panic_store);
1711
1712static void do_panic(void)
1713{
1714 on_panic_trigger.action->fn(&on_panic_trigger);
1715 stop_run(&on_panic_trigger);
1716}
1717
1718/* on restart */
1719
1720static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
1721 &stop_action};
1722
1723static ssize_t on_restart_show(struct kobject *kobj,
1724 struct kobj_attribute *attr, char *page)
1725{
1726 return sprintf(page, "%s\n", on_restart_trigger.action->name);
1727}
1728
1729static ssize_t on_restart_store(struct kobject *kobj,
1730 struct kobj_attribute *attr,
1731 const char *buf, size_t len)
1732{
1733 return set_trigger(buf, &on_restart_trigger, len);
1734}
1735
1736static struct kobj_attribute on_restart_attr =
1737 __ATTR(on_restart, 0644, on_restart_show, on_restart_store);
1738
1739void do_restart(void)
1740{
1741 smp_send_stop();
1742 on_restart_trigger.action->fn(&on_restart_trigger);
1743 stop_run(&on_restart_trigger);
1744}
1745
1746/* on halt */
1747
1748static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1749
1750static ssize_t on_halt_show(struct kobject *kobj,
1751 struct kobj_attribute *attr, char *page)
1752{
1753 return sprintf(page, "%s\n", on_halt_trigger.action->name);
1754}
1755
1756static ssize_t on_halt_store(struct kobject *kobj,
1757 struct kobj_attribute *attr,
1758 const char *buf, size_t len)
1759{
1760 return set_trigger(buf, &on_halt_trigger, len);
1761}
1762
1763static struct kobj_attribute on_halt_attr =
1764 __ATTR(on_halt, 0644, on_halt_show, on_halt_store);
1765
1766
1767static void do_machine_halt(void)
1768{
1769 smp_send_stop();
1770 on_halt_trigger.action->fn(&on_halt_trigger);
1771 stop_run(&on_halt_trigger);
1772}
1773void (*_machine_halt)(void) = do_machine_halt;
1774
1775/* on power off */
1776
1777static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1778
1779static ssize_t on_poff_show(struct kobject *kobj,
1780 struct kobj_attribute *attr, char *page)
1781{
1782 return sprintf(page, "%s\n", on_poff_trigger.action->name);
1783}
1784
1785static ssize_t on_poff_store(struct kobject *kobj,
1786 struct kobj_attribute *attr,
1787 const char *buf, size_t len)
1788{
1789 return set_trigger(buf, &on_poff_trigger, len);
1790}
1791
1792static struct kobj_attribute on_poff_attr =
1793 __ATTR(on_poff, 0644, on_poff_show, on_poff_store);
1794
1795
1796static void do_machine_power_off(void)
1797{
1798 smp_send_stop();
1799 on_poff_trigger.action->fn(&on_poff_trigger);
1800 stop_run(&on_poff_trigger);
1801}
1802void (*_machine_power_off)(void) = do_machine_power_off;
1803
1804static void __init shutdown_triggers_init(void)
1805{
1806 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1807 firmware_kobj);
1808 if (!shutdown_actions_kset)
1809 goto fail;
1810 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1811 &on_reboot_attr.attr))
1812 goto fail;
1813 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1814 &on_panic_attr.attr))
1815 goto fail;
1816 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1817 &on_halt_attr.attr))
1818 goto fail;
1819 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1820 &on_poff_attr.attr))
1821 goto fail;
1822 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1823 &on_restart_attr.attr))
1824 goto fail;
1825 return;
1826fail:
1827 panic("shutdown_triggers_init failed\n");
1828}
1829
1830static void __init shutdown_actions_init(void)
1831{
1832 int i;
1833
1834 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1835 if (!shutdown_actions_list[i]->init)
1836 continue;
1837 shutdown_actions_list[i]->init_rc =
1838 shutdown_actions_list[i]->init();
1839 }
1840}
1841
1842static int __init s390_ipl_init(void)
1843{
1844 sclp_get_ipl_info(&sclp_ipl_info);
1845 shutdown_actions_init();
1846 shutdown_triggers_init();
1847 return 0;
1848}
1849
1850__initcall(s390_ipl_init);
1851
1852static void __init strncpy_skip_quote(char *dst, char *src, int n)
1853{
1854 int sx, dx;
1855
1856 dx = 0;
1857 for (sx = 0; src[sx] != 0; sx++) {
1858 if (src[sx] == '"')
1859 continue;
1860 dst[dx++] = src[sx];
1861 if (dx >= n)
1862 break;
1863 }
1864}
1865
1866static int __init vmcmd_on_reboot_setup(char *str)
1867{
1868 if (!MACHINE_IS_VM)
1869 return 1;
1870 strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1871 vmcmd_on_reboot[127] = 0;
1872 on_reboot_trigger.action = &vmcmd_action;
1873 return 1;
1874}
1875__setup("vmreboot=", vmcmd_on_reboot_setup);
1876
1877static int __init vmcmd_on_panic_setup(char *str)
1878{
1879 if (!MACHINE_IS_VM)
1880 return 1;
1881 strncpy_skip_quote(vmcmd_on_panic, str, 127);
1882 vmcmd_on_panic[127] = 0;
1883 on_panic_trigger.action = &vmcmd_action;
1884 return 1;
1885}
1886__setup("vmpanic=", vmcmd_on_panic_setup);
1887
1888static int __init vmcmd_on_halt_setup(char *str)
1889{
1890 if (!MACHINE_IS_VM)
1891 return 1;
1892 strncpy_skip_quote(vmcmd_on_halt, str, 127);
1893 vmcmd_on_halt[127] = 0;
1894 on_halt_trigger.action = &vmcmd_action;
1895 return 1;
1896}
1897__setup("vmhalt=", vmcmd_on_halt_setup);
1898
1899static int __init vmcmd_on_poff_setup(char *str)
1900{
1901 if (!MACHINE_IS_VM)
1902 return 1;
1903 strncpy_skip_quote(vmcmd_on_poff, str, 127);
1904 vmcmd_on_poff[127] = 0;
1905 on_poff_trigger.action = &vmcmd_action;
1906 return 1;
1907}
1908__setup("vmpoff=", vmcmd_on_poff_setup);
1909
1910static int on_panic_notify(struct notifier_block *self,
1911 unsigned long event, void *data)
1912{
1913 do_panic();
1914 return NOTIFY_OK;
1915}
1916
1917static struct notifier_block on_panic_nb = {
1918 .notifier_call = on_panic_notify,
1919 .priority = INT_MIN,
1920};
1921
1922void __init setup_ipl(void)
1923{
1924 ipl_info.type = get_ipl_type();
1925 switch (ipl_info.type) {
1926 case IPL_TYPE_CCW:
1927 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1928 ipl_info.data.ccw.dev_id.ssid = 0;
1929 break;
1930 case IPL_TYPE_FCP:
1931 case IPL_TYPE_FCP_DUMP:
1932 ipl_info.data.fcp.dev_id.devno =
1933 IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1934 ipl_info.data.fcp.dev_id.ssid = 0;
1935 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1936 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1937 break;
1938 case IPL_TYPE_NSS:
1939 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1940 sizeof(ipl_info.data.nss.name));
1941 break;
1942 case IPL_TYPE_UNKNOWN:
1943 /* We have no info to copy */
1944 break;
1945 }
1946 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1947}
1948
1949void __init ipl_update_parameters(void)
1950{
1951 int rc;
1952
1953 rc = diag308(DIAG308_STORE, &ipl_block);
1954 if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
1955 diag308_set_works = 1;
1956}
1957
1958void __init ipl_save_parameters(void)
1959{
1960 struct cio_iplinfo iplinfo;
1961 void *src, *dst;
1962
1963 if (cio_get_iplinfo(&iplinfo))
1964 return;
1965
1966 ipl_devno = iplinfo.devno;
1967 ipl_flags |= IPL_DEVNO_VALID;
1968 if (!iplinfo.is_qdio)
1969 return;
1970 ipl_flags |= IPL_PARMBLOCK_VALID;
1971 src = (void *)(unsigned long)S390_lowcore.ipl_parmblock_ptr;
1972 dst = (void *)IPL_PARMBLOCK_ORIGIN;
1973 memmove(dst, src, PAGE_SIZE);
1974 S390_lowcore.ipl_parmblock_ptr = IPL_PARMBLOCK_ORIGIN;
1975}
1976
1977static LIST_HEAD(rcall);
1978static DEFINE_MUTEX(rcall_mutex);
1979
1980void register_reset_call(struct reset_call *reset)
1981{
1982 mutex_lock(&rcall_mutex);
1983 list_add(&reset->list, &rcall);
1984 mutex_unlock(&rcall_mutex);
1985}
1986EXPORT_SYMBOL_GPL(register_reset_call);
1987
1988void unregister_reset_call(struct reset_call *reset)
1989{
1990 mutex_lock(&rcall_mutex);
1991 list_del(&reset->list);
1992 mutex_unlock(&rcall_mutex);
1993}
1994EXPORT_SYMBOL_GPL(unregister_reset_call);
1995
1996static void do_reset_calls(void)
1997{
1998 struct reset_call *reset;
1999
2000#ifdef CONFIG_64BIT
2001 if (diag308_set_works) {
2002 diag308_reset();
2003 return;
2004 }
2005#endif
2006 list_for_each_entry(reset, &rcall, list)
2007 reset->fn();
2008}
2009
2010u32 dump_prefix_page;
2011
2012void s390_reset_system(void)
2013{
2014 struct _lowcore *lc;
2015
2016 lc = (struct _lowcore *)(unsigned long) store_prefix();
2017
2018 /* Stack for interrupt/machine check handler */
2019 lc->panic_stack = S390_lowcore.panic_stack;
2020
2021 /* Save prefix page address for dump case */
2022 dump_prefix_page = (u32)(unsigned long) lc;
2023
2024 /* Disable prefixing */
2025 set_prefix(0);
2026
2027 /* Disable lowcore protection */
2028 __ctl_clear_bit(0,28);
2029
2030 /* Set new machine check handler */
2031 S390_lowcore.mcck_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
2032 S390_lowcore.mcck_new_psw.addr =
2033 PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;
2034
2035 /* Set new program check handler */
2036 S390_lowcore.program_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
2037 S390_lowcore.program_new_psw.addr =
2038 PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
2039
2040 do_reset_calls();
2041}
2042