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
60 struct shutdown_action;
61 struct 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
76 struct shutdown_action {
77 char *name;
78 void (*fn) (struct shutdown_trigger *trigger);
79 int (*init) (void);
80 int init_rc;
81 };
82
ipl_type_str(enum ipl_type type)83 static 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
100 enum dump_type {
101 DUMP_TYPE_NONE = 1,
102 DUMP_TYPE_CCW = 2,
103 DUMP_TYPE_FCP = 4,
104 };
105
dump_type_str(enum dump_type type)106 static 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
120 static int ipl_block_valid;
121 static struct ipl_parameter_block ipl_block;
122
123 static int reipl_capabilities = IPL_TYPE_UNKNOWN;
124
125 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
126 static struct ipl_parameter_block *reipl_block_fcp;
127 static struct ipl_parameter_block *reipl_block_ccw;
128 static struct ipl_parameter_block *reipl_block_nss;
129 static struct ipl_parameter_block *reipl_block_actual;
130
131 static int dump_capabilities = DUMP_TYPE_NONE;
132 static enum dump_type dump_type = DUMP_TYPE_NONE;
133 static struct ipl_parameter_block *dump_block_fcp;
134 static struct ipl_parameter_block *dump_block_ccw;
135
136 static struct sclp_ipl_info sclp_ipl_info;
137
__diag308(unsigned long subcode,void * addr)138 static 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
diag308(unsigned long subcode,void * addr)152 int diag308(unsigned long subcode, void *addr)
153 {
154 diag_stat_inc(DIAG_STAT_X308);
155 return __diag308(subcode, addr);
156 }
157 EXPORT_SYMBOL_GPL(diag308);
158
159 /* SYSFS */
160
161 #define IPL_ATTR_SHOW_FN(_prefix, _name, _format, args...) \
162 static 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) \
170 static 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) \
188 IPL_ATTR_SHOW_FN(_prefix, _name, "0.%x.%04x\n", \
189 _ipl_blk.ssid, _ipl_blk.devno); \
190 IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk); \
191 static 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) \
197 IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value) \
198 static 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) \
202 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value) \
203 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
204 struct kobj_attribute *attr, \
205 const char *buf, size_t len) \
206 { \
207 unsigned long long value; \
208 if (sscanf(buf, _fmt_in, &value) != 1) \
209 return -EINVAL; \
210 _value = value; \
211 return len; \
212 } \
213 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
214 __ATTR(_name,(S_IRUGO | S_IWUSR), \
215 sys_##_prefix##_##_name##_show, \
216 sys_##_prefix##_##_name##_store)
217
218 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
219 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, _value) \
220 static 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 } \
228 static 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
get_ipl_type(void)237 static __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
254 struct ipl_info ipl_info;
255 EXPORT_SYMBOL_GPL(ipl_info);
256
ipl_type_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)257 static 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
263 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
264
265 /* VM IPL PARM routines */
reipl_get_ascii_vmparm(char * dest,size_t size,const struct ipl_parameter_block * ipb)266 static 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
append_ipl_vmparm(char * dest,size_t size)298 size_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
ipl_vm_parm_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)310 static 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
scpdata_length(const char * buf,size_t count)319 static 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
reipl_append_ascii_scpdata(char * dest,size_t size,const struct ipl_parameter_block * ipb)329 static 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]);
356 out:
357 dest[count] = '\0';
358 return count;
359 }
360
append_ipl_scpdata(char * dest,size_t len)361 size_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
374 static struct kobj_attribute sys_ipl_vm_parm_attr =
375 __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
376
sys_ipl_device_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)377 static 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
393 static struct kobj_attribute sys_ipl_device_attr =
394 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
395
ipl_parameter_read(struct file * filp,struct kobject * kobj,struct bin_attribute * attr,char * buf,loff_t off,size_t count)396 static 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 }
403 static struct bin_attribute ipl_parameter_attr =
404 __BIN_ATTR(binary_parameter, S_IRUGO, ipl_parameter_read, NULL,
405 PAGE_SIZE);
406
ipl_scp_data_read(struct file * filp,struct kobject * kobj,struct bin_attribute * attr,char * buf,loff_t off,size_t count)407 static 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 }
416 static struct bin_attribute ipl_scp_data_attr =
417 __BIN_ATTR(scp_data, S_IRUGO, ipl_scp_data_read, NULL, PAGE_SIZE);
418
419 static 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
427 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n",
428 (unsigned long long)ipl_block.ipl_info.fcp.wwpn);
429 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n",
430 (unsigned long long)ipl_block.ipl_info.fcp.lun);
431 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n",
432 (unsigned long long)ipl_block.ipl_info.fcp.bootprog);
433 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n",
434 (unsigned long long)ipl_block.ipl_info.fcp.br_lba);
435
ipl_ccw_loadparm_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)436 static 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
449 static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
450 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
451
452 static 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
463 static 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
470 static 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
478 static 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
485 static struct attribute_group ipl_ccw_attr_group_vm = {
486 .attrs = ipl_ccw_attrs_vm,
487 };
488
489 static struct attribute_group ipl_ccw_attr_group_lpar = {
490 .attrs = ipl_ccw_attrs_lpar
491 };
492
493 /* UNKNOWN ipl device attributes */
494
495 static struct attribute *ipl_unknown_attrs[] = {
496 &sys_ipl_type_attr.attr,
497 NULL,
498 };
499
500 static struct attribute_group ipl_unknown_attr_group = {
501 .attrs = ipl_unknown_attrs,
502 };
503
504 static struct kset *ipl_kset;
505
__ipl_run(void * unused)506 static void __ipl_run(void *unused)
507 {
508 __bpon();
509 diag308(DIAG308_LOAD_CLEAR, NULL);
510 }
511
ipl_run(struct shutdown_trigger * trigger)512 static void ipl_run(struct shutdown_trigger *trigger)
513 {
514 smp_call_ipl_cpu(__ipl_run, NULL);
515 }
516
ipl_init(void)517 static 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 }
544 out:
545 if (rc)
546 panic("ipl_init failed: rc = %i\n", rc);
547
548 return 0;
549 }
550
551 static 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 */
reipl_generic_vmparm_show(struct ipl_parameter_block * ipb,char * page)562 static 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
reipl_generic_vmparm_store(struct ipl_parameter_block * ipb,size_t vmparm_max,const char * buf,size_t len)571 static 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 */
reipl_nss_vmparm_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)604 static 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
reipl_nss_vmparm_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)610 static 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 */
reipl_ccw_vmparm_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)618 static 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
reipl_ccw_vmparm_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)624 static 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
631 static struct kobj_attribute sys_reipl_nss_vmparm_attr =
632 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
633 reipl_nss_vmparm_store);
634 static 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
reipl_fcp_scpdata_read(struct file * filp,struct kobject * kobj,struct bin_attribute * attr,char * buf,loff_t off,size_t count)640 static 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
reipl_fcp_scpdata_write(struct file * filp,struct kobject * kobj,struct bin_attribute * attr,char * buf,loff_t off,size_t count)650 static 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 }
675 static 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
679 static struct bin_attribute *reipl_fcp_bin_attrs[] = {
680 &sys_reipl_fcp_scp_data_attr,
681 NULL,
682 };
683
684 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n",
685 reipl_block_fcp->ipl_info.fcp.wwpn);
686 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n",
687 reipl_block_fcp->ipl_info.fcp.lun);
688 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
689 reipl_block_fcp->ipl_info.fcp.bootprog);
690 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
691 reipl_block_fcp->ipl_info.fcp.br_lba);
692 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
693 reipl_block_fcp->ipl_info.fcp.devno);
694
reipl_get_ascii_loadparm(char * loadparm,struct ipl_parameter_block * ibp)695 static 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
reipl_generic_loadparm_show(struct ipl_parameter_block * ipb,char * page)704 static 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
reipl_generic_loadparm_store(struct ipl_parameter_block * ipb,const char * buf,size_t len)713 static 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 */
reipl_fcp_loadparm_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)742 static 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
reipl_fcp_loadparm_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)748 static 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
755 static 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
759 static 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
769 static 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 */
775 DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ipl_info.ccw);
776
777 /* NSS wrapper */
reipl_nss_loadparm_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)778 static 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
reipl_nss_loadparm_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)784 static 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 */
reipl_ccw_loadparm_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)792 static 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
reipl_ccw_loadparm_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)798 static 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
805 static 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
809 static 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
816 static struct attribute *reipl_ccw_attrs_lpar[] = {
817 &sys_reipl_ccw_device_attr.attr,
818 &sys_reipl_ccw_loadparm_attr.attr,
819 NULL,
820 };
821
822 static struct attribute_group reipl_ccw_attr_group_vm = {
823 .name = IPL_CCW_STR,
824 .attrs = reipl_ccw_attrs_vm,
825 };
826
827 static 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 */
reipl_get_ascii_nss_name(char * dst,struct ipl_parameter_block * ipb)834 static 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
reipl_nss_name_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)842 static 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
reipl_nss_name_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)851 static 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
880 static 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
884 static 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
888 static 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
895 static struct attribute_group reipl_nss_attr_group = {
896 .name = IPL_NSS_STR,
897 .attrs = reipl_nss_attrs,
898 };
899
set_os_info_reipl_block(void)900 void 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
reipl_set_type(enum ipl_type type)908 static 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
reipl_type_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)930 static 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
reipl_type_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)936 static 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
951 static struct kobj_attribute reipl_type_attr =
952 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
953
954 static struct kset *reipl_kset;
955 static struct kset *reipl_fcp_kset;
956
__reipl_run(void * unused)957 static 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
reipl_run(struct shutdown_trigger * trigger)981 static void reipl_run(struct shutdown_trigger *trigger)
982 {
983 smp_call_ipl_cpu(__reipl_run, NULL);
984 }
985
reipl_block_ccw_init(struct ipl_parameter_block * ipb)986 static 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
reipl_block_ccw_fill_parms(struct ipl_parameter_block * ipb)994 static 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
reipl_nss_init(void)1017 static 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
reipl_ccw_init(void)1037 static 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
reipl_fcp_init(void)1062 static 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
reipl_type_init(void)1105 static 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 }
1124 out:
1125 return reipl_set_type(reipl_type);
1126 }
1127
reipl_init(void)1128 static 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
1152 static 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
1164 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n",
1165 dump_block_fcp->ipl_info.fcp.wwpn);
1166 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n",
1167 dump_block_fcp->ipl_info.fcp.lun);
1168 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1169 dump_block_fcp->ipl_info.fcp.bootprog);
1170 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1171 dump_block_fcp->ipl_info.fcp.br_lba);
1172 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1173 dump_block_fcp->ipl_info.fcp.devno);
1174
1175 static 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
1184 static struct attribute_group dump_fcp_attr_group = {
1185 .name = IPL_FCP_STR,
1186 .attrs = dump_fcp_attrs,
1187 };
1188
1189 /* CCW dump device attributes */
1190 DEFINE_IPL_CCW_ATTR_RW(dump_ccw, device, dump_block_ccw->ipl_info.ccw);
1191
1192 static struct attribute *dump_ccw_attrs[] = {
1193 &sys_dump_ccw_device_attr.attr,
1194 NULL,
1195 };
1196
1197 static struct attribute_group dump_ccw_attr_group = {
1198 .name = IPL_CCW_STR,
1199 .attrs = dump_ccw_attrs,
1200 };
1201
1202 /* dump type */
1203
dump_set_type(enum dump_type type)1204 static 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
dump_type_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)1212 static 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
dump_type_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)1218 static 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
1233 static struct kobj_attribute dump_type_attr =
1234 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1235
1236 static struct kset *dump_kset;
1237
diag308_dump(void * dump_block)1238 static 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
__dump_run(void * unused)1248 static 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
dump_run(struct shutdown_trigger * trigger)1262 static 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
dump_ccw_init(void)1270 static 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
dump_fcp_init(void)1290 static 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
dump_init(void)1313 static 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
1335 static struct shutdown_action __refdata dump_action = {
1336 .name = SHUTDOWN_ACTION_DUMP_STR,
1337 .fn = dump_run,
1338 .init = dump_init,
1339 };
1340
dump_reipl_run(struct shutdown_trigger * trigger)1341 static 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
1353 static 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
1362 static char vmcmd_on_reboot[128];
1363 static char vmcmd_on_panic[128];
1364 static char vmcmd_on_halt[128];
1365 static char vmcmd_on_poff[128];
1366 static char vmcmd_on_restart[128];
1367
1368 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1369 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1370 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1371 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1372 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1373
1374 static 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
1383 static struct attribute_group vmcmd_attr_group = {
1384 .attrs = vmcmd_attrs,
1385 };
1386
1387 static struct kset *vmcmd_kset;
1388
vmcmd_run(struct shutdown_trigger * trigger)1389 static 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
vmcmd_init(void)1411 static 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
1421 static 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
stop_run(struct shutdown_trigger * trigger)1428 static 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
1436 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1437 stop_run, NULL};
1438
1439 /* action list */
1440
1441 static 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
1450 static struct kset *shutdown_actions_kset;
1451
set_trigger(const char * buf,struct shutdown_trigger * trigger,size_t len)1452 static 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
1472 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1473 &reipl_action};
1474
on_reboot_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)1475 static 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
on_reboot_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)1481 static 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 }
1487 static struct kobj_attribute on_reboot_attr = __ATTR_RW(on_reboot);
1488
do_machine_restart(char * __unused)1489 static 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 }
1495 void (*_machine_restart)(char *command) = do_machine_restart;
1496
1497 /* on panic */
1498
1499 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1500
on_panic_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)1501 static 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
on_panic_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)1507 static 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 }
1513 static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic);
1514
do_panic(void)1515 static 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
1524 static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
1525 &stop_action};
1526
on_restart_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)1527 static 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
on_restart_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)1533 static 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 }
1539 static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart);
1540
__do_restart(void * ignore)1541 static 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
do_restart(void)1552 void 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
1562 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1563
on_halt_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)1564 static 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
on_halt_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)1570 static 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 }
1576 static struct kobj_attribute on_halt_attr = __ATTR_RW(on_halt);
1577
do_machine_halt(void)1578 static 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 }
1584 void (*_machine_halt)(void) = do_machine_halt;
1585
1586 /* on power off */
1587
1588 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1589
on_poff_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)1590 static 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
on_poff_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)1596 static 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 }
1602 static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff);
1603
do_machine_power_off(void)1604 static 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 }
1610 void (*_machine_power_off)(void) = do_machine_power_off;
1611
1612 static 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
1621 static struct attribute_group shutdown_action_attr_group = {
1622 .attrs = shutdown_action_attrs,
1623 };
1624
shutdown_triggers_init(void)1625 static 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;
1635 fail:
1636 panic("shutdown_triggers_init failed\n");
1637 }
1638
shutdown_actions_init(void)1639 static 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
s390_ipl_init(void)1651 static 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
strncpy_skip_quote(char * dst,char * src,int n)1675 static 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
vmcmd_on_reboot_setup(char * str)1689 static 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
vmcmd_on_panic_setup(char * str)1700 static 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
vmcmd_on_halt_setup(char * str)1711 static 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
vmcmd_on_poff_setup(char * str)1722 static 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
on_panic_notify(struct notifier_block * self,unsigned long event,void * data)1733 static int on_panic_notify(struct notifier_block *self,
1734 unsigned long event, void *data)
1735 {
1736 do_panic();
1737 return NOTIFY_OK;
1738 }
1739
1740 static struct notifier_block on_panic_nb = {
1741 .notifier_call = on_panic_notify,
1742 .priority = INT_MIN,
1743 };
1744
setup_ipl(void)1745 void __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
ipl_store_parameters(void)1770 void __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
s390_reset_system(void)1779 void 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 }
1788
