1 /*
2 * arch/s390/kernel/ipl.c
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/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 <linux/crash_dump.h>
20 #include <linux/debug_locks.h>
21 #include <asm/ipl.h>
22 #include <asm/smp.h>
23 #include <asm/setup.h>
24 #include <asm/cpcmd.h>
25 #include <asm/cio.h>
26 #include <asm/ebcdic.h>
27 #include <asm/reset.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 /*
121 * Must be in data section since the bss section
122 * is not cleared when these are accessed.
123 */
124 static u16 ipl_devno __attribute__((__section__(".data"))) = 0;
125 u32 ipl_flags __attribute__((__section__(".data"))) = 0;
126
127 enum ipl_method {
128 REIPL_METHOD_CCW_CIO,
129 REIPL_METHOD_CCW_DIAG,
130 REIPL_METHOD_CCW_VM,
131 REIPL_METHOD_FCP_RO_DIAG,
132 REIPL_METHOD_FCP_RW_DIAG,
133 REIPL_METHOD_FCP_RO_VM,
134 REIPL_METHOD_FCP_DUMP,
135 REIPL_METHOD_NSS,
136 REIPL_METHOD_NSS_DIAG,
137 REIPL_METHOD_DEFAULT,
138 };
139
140 enum dump_method {
141 DUMP_METHOD_NONE,
142 DUMP_METHOD_CCW_CIO,
143 DUMP_METHOD_CCW_DIAG,
144 DUMP_METHOD_CCW_VM,
145 DUMP_METHOD_FCP_DIAG,
146 };
147
148 static int diag308_set_works = 0;
149
150 static struct ipl_parameter_block ipl_block;
151
152 static int reipl_capabilities = IPL_TYPE_UNKNOWN;
153
154 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
155 static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
156 static struct ipl_parameter_block *reipl_block_fcp;
157 static struct ipl_parameter_block *reipl_block_ccw;
158 static struct ipl_parameter_block *reipl_block_nss;
159 static struct ipl_parameter_block *reipl_block_actual;
160
161 static int dump_capabilities = DUMP_TYPE_NONE;
162 static enum dump_type dump_type = DUMP_TYPE_NONE;
163 static enum dump_method dump_method = DUMP_METHOD_NONE;
164 static struct ipl_parameter_block *dump_block_fcp;
165 static struct ipl_parameter_block *dump_block_ccw;
166
167 static struct sclp_ipl_info sclp_ipl_info;
168
diag308(unsigned long subcode,void * addr)169 int diag308(unsigned long subcode, void *addr)
170 {
171 register unsigned long _addr asm("0") = (unsigned long) addr;
172 register unsigned long _rc asm("1") = 0;
173
174 asm volatile(
175 " diag %0,%2,0x308\n"
176 "0:\n"
177 EX_TABLE(0b,0b)
178 : "+d" (_addr), "+d" (_rc)
179 : "d" (subcode) : "cc", "memory");
180 return _rc;
181 }
182 EXPORT_SYMBOL_GPL(diag308);
183
184 /* SYSFS */
185
186 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
187 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
188 struct kobj_attribute *attr, \
189 char *page) \
190 { \
191 return sprintf(page, _format, _value); \
192 } \
193 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
194 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL);
195
196 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
197 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
198 struct kobj_attribute *attr, \
199 char *page) \
200 { \
201 return sprintf(page, _fmt_out, \
202 (unsigned long long) _value); \
203 } \
204 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
205 struct kobj_attribute *attr, \
206 const char *buf, size_t len) \
207 { \
208 unsigned long long value; \
209 if (sscanf(buf, _fmt_in, &value) != 1) \
210 return -EINVAL; \
211 _value = value; \
212 return len; \
213 } \
214 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
215 __ATTR(_name,(S_IRUGO | S_IWUSR), \
216 sys_##_prefix##_##_name##_show, \
217 sys_##_prefix##_##_name##_store);
218
219 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
220 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
221 struct kobj_attribute *attr, \
222 char *page) \
223 { \
224 return sprintf(page, _fmt_out, _value); \
225 } \
226 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
227 struct kobj_attribute *attr, \
228 const char *buf, size_t len) \
229 { \
230 strncpy(_value, buf, sizeof(_value) - 1); \
231 strim(_value); \
232 return len; \
233 } \
234 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
235 __ATTR(_name,(S_IRUGO | S_IWUSR), \
236 sys_##_prefix##_##_name##_show, \
237 sys_##_prefix##_##_name##_store);
238
make_attrs_ro(struct attribute ** attrs)239 static void make_attrs_ro(struct attribute **attrs)
240 {
241 while (*attrs) {
242 (*attrs)->mode = S_IRUGO;
243 attrs++;
244 }
245 }
246
247 /*
248 * ipl section
249 */
250
get_ipl_type(void)251 static __init enum ipl_type get_ipl_type(void)
252 {
253 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
254
255 if (ipl_flags & IPL_NSS_VALID)
256 return IPL_TYPE_NSS;
257 if (!(ipl_flags & IPL_DEVNO_VALID))
258 return IPL_TYPE_UNKNOWN;
259 if (!(ipl_flags & IPL_PARMBLOCK_VALID))
260 return IPL_TYPE_CCW;
261 if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
262 return IPL_TYPE_UNKNOWN;
263 if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
264 return IPL_TYPE_UNKNOWN;
265 if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
266 return IPL_TYPE_FCP_DUMP;
267 return IPL_TYPE_FCP;
268 }
269
270 struct ipl_info ipl_info;
271 EXPORT_SYMBOL_GPL(ipl_info);
272
ipl_type_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)273 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
274 char *page)
275 {
276 return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
277 }
278
279 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
280
281 /* VM IPL PARM routines */
reipl_get_ascii_vmparm(char * dest,size_t size,const struct ipl_parameter_block * ipb)282 static size_t reipl_get_ascii_vmparm(char *dest, size_t size,
283 const struct ipl_parameter_block *ipb)
284 {
285 int i;
286 size_t len;
287 char has_lowercase = 0;
288
289 len = 0;
290 if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
291 (ipb->ipl_info.ccw.vm_parm_len > 0)) {
292
293 len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
294 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
295 /* If at least one character is lowercase, we assume mixed
296 * case; otherwise we convert everything to lowercase.
297 */
298 for (i = 0; i < len; i++)
299 if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
300 (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
301 (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
302 has_lowercase = 1;
303 break;
304 }
305 if (!has_lowercase)
306 EBC_TOLOWER(dest, len);
307 EBCASC(dest, len);
308 }
309 dest[len] = 0;
310
311 return len;
312 }
313
append_ipl_vmparm(char * dest,size_t size)314 size_t append_ipl_vmparm(char *dest, size_t size)
315 {
316 size_t rc;
317
318 rc = 0;
319 if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
320 rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
321 else
322 dest[0] = 0;
323 return rc;
324 }
325
ipl_vm_parm_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)326 static ssize_t ipl_vm_parm_show(struct kobject *kobj,
327 struct kobj_attribute *attr, char *page)
328 {
329 char parm[DIAG308_VMPARM_SIZE + 1] = {};
330
331 append_ipl_vmparm(parm, sizeof(parm));
332 return sprintf(page, "%s\n", parm);
333 }
334
scpdata_length(const char * buf,size_t count)335 static size_t scpdata_length(const char* buf, size_t count)
336 {
337 while (count) {
338 if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
339 break;
340 count--;
341 }
342 return count;
343 }
344
reipl_append_ascii_scpdata(char * dest,size_t size,const struct ipl_parameter_block * ipb)345 static size_t reipl_append_ascii_scpdata(char *dest, size_t size,
346 const struct ipl_parameter_block *ipb)
347 {
348 size_t count;
349 size_t i;
350 int has_lowercase;
351
352 count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data,
353 ipb->ipl_info.fcp.scp_data_len));
354 if (!count)
355 goto out;
356
357 has_lowercase = 0;
358 for (i = 0; i < count; i++) {
359 if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
360 count = 0;
361 goto out;
362 }
363 if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
364 has_lowercase = 1;
365 }
366
367 if (has_lowercase)
368 memcpy(dest, ipb->ipl_info.fcp.scp_data, count);
369 else
370 for (i = 0; i < count; i++)
371 dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]);
372 out:
373 dest[count] = '\0';
374 return count;
375 }
376
append_ipl_scpdata(char * dest,size_t len)377 size_t append_ipl_scpdata(char *dest, size_t len)
378 {
379 size_t rc;
380
381 rc = 0;
382 if (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP)
383 rc = reipl_append_ascii_scpdata(dest, len, &ipl_block);
384 else
385 dest[0] = 0;
386 return rc;
387 }
388
389
390 static struct kobj_attribute sys_ipl_vm_parm_attr =
391 __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
392
sys_ipl_device_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)393 static ssize_t sys_ipl_device_show(struct kobject *kobj,
394 struct kobj_attribute *attr, char *page)
395 {
396 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
397
398 switch (ipl_info.type) {
399 case IPL_TYPE_CCW:
400 return sprintf(page, "0.0.%04x\n", ipl_devno);
401 case IPL_TYPE_FCP:
402 case IPL_TYPE_FCP_DUMP:
403 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
404 default:
405 return 0;
406 }
407 }
408
409 static struct kobj_attribute sys_ipl_device_attr =
410 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
411
ipl_parameter_read(struct file * filp,struct kobject * kobj,struct bin_attribute * attr,char * buf,loff_t off,size_t count)412 static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
413 struct bin_attribute *attr, char *buf,
414 loff_t off, size_t count)
415 {
416 return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START,
417 IPL_PARMBLOCK_SIZE);
418 }
419
420 static struct bin_attribute ipl_parameter_attr = {
421 .attr = {
422 .name = "binary_parameter",
423 .mode = S_IRUGO,
424 },
425 .size = PAGE_SIZE,
426 .read = &ipl_parameter_read,
427 };
428
ipl_scp_data_read(struct file * filp,struct kobject * kobj,struct bin_attribute * attr,char * buf,loff_t off,size_t count)429 static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
430 struct bin_attribute *attr, char *buf,
431 loff_t off, size_t count)
432 {
433 unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
434 void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
435
436 return memory_read_from_buffer(buf, count, &off, scp_data, size);
437 }
438
439 static struct bin_attribute ipl_scp_data_attr = {
440 .attr = {
441 .name = "scp_data",
442 .mode = S_IRUGO,
443 },
444 .size = PAGE_SIZE,
445 .read = ipl_scp_data_read,
446 };
447
448 /* FCP ipl device attributes */
449
450 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
451 IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
452 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
453 IPL_PARMBLOCK_START->ipl_info.fcp.lun);
454 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
455 IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
456 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
457 IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
458
459 static struct attribute *ipl_fcp_attrs[] = {
460 &sys_ipl_type_attr.attr,
461 &sys_ipl_device_attr.attr,
462 &sys_ipl_fcp_wwpn_attr.attr,
463 &sys_ipl_fcp_lun_attr.attr,
464 &sys_ipl_fcp_bootprog_attr.attr,
465 &sys_ipl_fcp_br_lba_attr.attr,
466 NULL,
467 };
468
469 static struct attribute_group ipl_fcp_attr_group = {
470 .attrs = ipl_fcp_attrs,
471 };
472
473 /* CCW ipl device attributes */
474
ipl_ccw_loadparm_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)475 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
476 struct kobj_attribute *attr, char *page)
477 {
478 char loadparm[LOADPARM_LEN + 1] = {};
479
480 if (!sclp_ipl_info.is_valid)
481 return sprintf(page, "#unknown#\n");
482 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
483 EBCASC(loadparm, LOADPARM_LEN);
484 strim(loadparm);
485 return sprintf(page, "%s\n", loadparm);
486 }
487
488 static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
489 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
490
491 static struct attribute *ipl_ccw_attrs_vm[] = {
492 &sys_ipl_type_attr.attr,
493 &sys_ipl_device_attr.attr,
494 &sys_ipl_ccw_loadparm_attr.attr,
495 &sys_ipl_vm_parm_attr.attr,
496 NULL,
497 };
498
499 static struct attribute *ipl_ccw_attrs_lpar[] = {
500 &sys_ipl_type_attr.attr,
501 &sys_ipl_device_attr.attr,
502 &sys_ipl_ccw_loadparm_attr.attr,
503 NULL,
504 };
505
506 static struct attribute_group ipl_ccw_attr_group_vm = {
507 .attrs = ipl_ccw_attrs_vm,
508 };
509
510 static struct attribute_group ipl_ccw_attr_group_lpar = {
511 .attrs = ipl_ccw_attrs_lpar
512 };
513
514 /* NSS ipl device attributes */
515
516 DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
517
518 static struct attribute *ipl_nss_attrs[] = {
519 &sys_ipl_type_attr.attr,
520 &sys_ipl_nss_name_attr.attr,
521 &sys_ipl_ccw_loadparm_attr.attr,
522 &sys_ipl_vm_parm_attr.attr,
523 NULL,
524 };
525
526 static struct attribute_group ipl_nss_attr_group = {
527 .attrs = ipl_nss_attrs,
528 };
529
530 /* UNKNOWN ipl device attributes */
531
532 static struct attribute *ipl_unknown_attrs[] = {
533 &sys_ipl_type_attr.attr,
534 NULL,
535 };
536
537 static struct attribute_group ipl_unknown_attr_group = {
538 .attrs = ipl_unknown_attrs,
539 };
540
541 static struct kset *ipl_kset;
542
ipl_register_fcp_files(void)543 static int __init ipl_register_fcp_files(void)
544 {
545 int rc;
546
547 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
548 if (rc)
549 goto out;
550 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
551 if (rc)
552 goto out_ipl_parm;
553 rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_scp_data_attr);
554 if (!rc)
555 goto out;
556
557 sysfs_remove_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
558
559 out_ipl_parm:
560 sysfs_remove_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
561 out:
562 return rc;
563 }
564
__ipl_run(void * unused)565 static void __ipl_run(void *unused)
566 {
567 diag308(DIAG308_IPL, NULL);
568 if (MACHINE_IS_VM)
569 __cpcmd("IPL", NULL, 0, NULL);
570 else if (ipl_info.type == IPL_TYPE_CCW)
571 reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
572 }
573
ipl_run(struct shutdown_trigger * trigger)574 static void ipl_run(struct shutdown_trigger *trigger)
575 {
576 smp_call_ipl_cpu(__ipl_run, NULL);
577 }
578
ipl_init(void)579 static int __init ipl_init(void)
580 {
581 int rc;
582
583 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
584 if (!ipl_kset) {
585 rc = -ENOMEM;
586 goto out;
587 }
588 switch (ipl_info.type) {
589 case IPL_TYPE_CCW:
590 if (MACHINE_IS_VM)
591 rc = sysfs_create_group(&ipl_kset->kobj,
592 &ipl_ccw_attr_group_vm);
593 else
594 rc = sysfs_create_group(&ipl_kset->kobj,
595 &ipl_ccw_attr_group_lpar);
596 break;
597 case IPL_TYPE_FCP:
598 case IPL_TYPE_FCP_DUMP:
599 rc = ipl_register_fcp_files();
600 break;
601 case IPL_TYPE_NSS:
602 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group);
603 break;
604 default:
605 rc = sysfs_create_group(&ipl_kset->kobj,
606 &ipl_unknown_attr_group);
607 break;
608 }
609 out:
610 if (rc)
611 panic("ipl_init failed: rc = %i\n", rc);
612
613 return 0;
614 }
615
616 static struct shutdown_action __refdata ipl_action = {
617 .name = SHUTDOWN_ACTION_IPL_STR,
618 .fn = ipl_run,
619 .init = ipl_init,
620 };
621
622 /*
623 * reipl shutdown action: Reboot Linux on shutdown.
624 */
625
626 /* VM IPL PARM attributes */
reipl_generic_vmparm_show(struct ipl_parameter_block * ipb,char * page)627 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
628 char *page)
629 {
630 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
631
632 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
633 return sprintf(page, "%s\n", vmparm);
634 }
635
reipl_generic_vmparm_store(struct ipl_parameter_block * ipb,size_t vmparm_max,const char * buf,size_t len)636 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
637 size_t vmparm_max,
638 const char *buf, size_t len)
639 {
640 int i, ip_len;
641
642 /* ignore trailing newline */
643 ip_len = len;
644 if ((len > 0) && (buf[len - 1] == '\n'))
645 ip_len--;
646
647 if (ip_len > vmparm_max)
648 return -EINVAL;
649
650 /* parm is used to store kernel options, check for common chars */
651 for (i = 0; i < ip_len; i++)
652 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
653 return -EINVAL;
654
655 memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
656 ipb->ipl_info.ccw.vm_parm_len = ip_len;
657 if (ip_len > 0) {
658 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
659 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
660 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
661 } else {
662 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
663 }
664
665 return len;
666 }
667
668 /* NSS wrapper */
reipl_nss_vmparm_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)669 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
670 struct kobj_attribute *attr, char *page)
671 {
672 return reipl_generic_vmparm_show(reipl_block_nss, page);
673 }
674
reipl_nss_vmparm_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)675 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
676 struct kobj_attribute *attr,
677 const char *buf, size_t len)
678 {
679 return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
680 }
681
682 /* CCW wrapper */
reipl_ccw_vmparm_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)683 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
684 struct kobj_attribute *attr, char *page)
685 {
686 return reipl_generic_vmparm_show(reipl_block_ccw, page);
687 }
688
reipl_ccw_vmparm_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)689 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
690 struct kobj_attribute *attr,
691 const char *buf, size_t len)
692 {
693 return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
694 }
695
696 static struct kobj_attribute sys_reipl_nss_vmparm_attr =
697 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
698 reipl_nss_vmparm_store);
699 static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
700 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
701 reipl_ccw_vmparm_store);
702
703 /* FCP reipl device attributes */
704
reipl_fcp_scpdata_read(struct file * filp,struct kobject * kobj,struct bin_attribute * attr,char * buf,loff_t off,size_t count)705 static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
706 struct bin_attribute *attr,
707 char *buf, loff_t off, size_t count)
708 {
709 size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
710 void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
711
712 return memory_read_from_buffer(buf, count, &off, scp_data, size);
713 }
714
reipl_fcp_scpdata_write(struct file * filp,struct kobject * kobj,struct bin_attribute * attr,char * buf,loff_t off,size_t count)715 static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
716 struct bin_attribute *attr,
717 char *buf, loff_t off, size_t count)
718 {
719 size_t padding;
720 size_t scpdata_len;
721
722 if (off < 0)
723 return -EINVAL;
724
725 if (off >= DIAG308_SCPDATA_SIZE)
726 return -ENOSPC;
727
728 if (count > DIAG308_SCPDATA_SIZE - off)
729 count = DIAG308_SCPDATA_SIZE - off;
730
731 memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf + off, count);
732 scpdata_len = off + count;
733
734 if (scpdata_len % 8) {
735 padding = 8 - (scpdata_len % 8);
736 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
737 0, padding);
738 scpdata_len += padding;
739 }
740
741 reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
742 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
743 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
744
745 return count;
746 }
747
748 static struct bin_attribute sys_reipl_fcp_scp_data_attr = {
749 .attr = {
750 .name = "scp_data",
751 .mode = S_IRUGO | S_IWUSR,
752 },
753 .size = PAGE_SIZE,
754 .read = reipl_fcp_scpdata_read,
755 .write = reipl_fcp_scpdata_write,
756 };
757
758 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n",
759 reipl_block_fcp->ipl_info.fcp.wwpn);
760 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n",
761 reipl_block_fcp->ipl_info.fcp.lun);
762 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
763 reipl_block_fcp->ipl_info.fcp.bootprog);
764 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
765 reipl_block_fcp->ipl_info.fcp.br_lba);
766 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
767 reipl_block_fcp->ipl_info.fcp.devno);
768
769 static struct attribute *reipl_fcp_attrs[] = {
770 &sys_reipl_fcp_device_attr.attr,
771 &sys_reipl_fcp_wwpn_attr.attr,
772 &sys_reipl_fcp_lun_attr.attr,
773 &sys_reipl_fcp_bootprog_attr.attr,
774 &sys_reipl_fcp_br_lba_attr.attr,
775 NULL,
776 };
777
778 static struct attribute_group reipl_fcp_attr_group = {
779 .attrs = reipl_fcp_attrs,
780 };
781
782 /* CCW reipl device attributes */
783
784 DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
785 reipl_block_ccw->ipl_info.ccw.devno);
786
reipl_get_ascii_loadparm(char * loadparm,struct ipl_parameter_block * ibp)787 static void reipl_get_ascii_loadparm(char *loadparm,
788 struct ipl_parameter_block *ibp)
789 {
790 memcpy(loadparm, ibp->ipl_info.ccw.load_parm, LOADPARM_LEN);
791 EBCASC(loadparm, LOADPARM_LEN);
792 loadparm[LOADPARM_LEN] = 0;
793 strim(loadparm);
794 }
795
reipl_generic_loadparm_show(struct ipl_parameter_block * ipb,char * page)796 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
797 char *page)
798 {
799 char buf[LOADPARM_LEN + 1];
800
801 reipl_get_ascii_loadparm(buf, ipb);
802 return sprintf(page, "%s\n", buf);
803 }
804
reipl_generic_loadparm_store(struct ipl_parameter_block * ipb,const char * buf,size_t len)805 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
806 const char *buf, size_t len)
807 {
808 int i, lp_len;
809
810 /* ignore trailing newline */
811 lp_len = len;
812 if ((len > 0) && (buf[len - 1] == '\n'))
813 lp_len--;
814 /* loadparm can have max 8 characters and must not start with a blank */
815 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
816 return -EINVAL;
817 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
818 for (i = 0; i < lp_len; i++) {
819 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
820 (buf[i] == '.'))
821 continue;
822 return -EINVAL;
823 }
824 /* initialize loadparm with blanks */
825 memset(ipb->ipl_info.ccw.load_parm, ' ', LOADPARM_LEN);
826 /* copy and convert to ebcdic */
827 memcpy(ipb->ipl_info.ccw.load_parm, buf, lp_len);
828 ASCEBC(ipb->ipl_info.ccw.load_parm, LOADPARM_LEN);
829 return len;
830 }
831
832 /* NSS wrapper */
reipl_nss_loadparm_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)833 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
834 struct kobj_attribute *attr, char *page)
835 {
836 return reipl_generic_loadparm_show(reipl_block_nss, page);
837 }
838
reipl_nss_loadparm_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)839 static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
840 struct kobj_attribute *attr,
841 const char *buf, size_t len)
842 {
843 return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
844 }
845
846 /* CCW wrapper */
reipl_ccw_loadparm_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)847 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
848 struct kobj_attribute *attr, char *page)
849 {
850 return reipl_generic_loadparm_show(reipl_block_ccw, page);
851 }
852
reipl_ccw_loadparm_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)853 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
854 struct kobj_attribute *attr,
855 const char *buf, size_t len)
856 {
857 return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
858 }
859
860 static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
861 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
862 reipl_ccw_loadparm_store);
863
864 static struct attribute *reipl_ccw_attrs_vm[] = {
865 &sys_reipl_ccw_device_attr.attr,
866 &sys_reipl_ccw_loadparm_attr.attr,
867 &sys_reipl_ccw_vmparm_attr.attr,
868 NULL,
869 };
870
871 static struct attribute *reipl_ccw_attrs_lpar[] = {
872 &sys_reipl_ccw_device_attr.attr,
873 &sys_reipl_ccw_loadparm_attr.attr,
874 NULL,
875 };
876
877 static struct attribute_group reipl_ccw_attr_group_vm = {
878 .name = IPL_CCW_STR,
879 .attrs = reipl_ccw_attrs_vm,
880 };
881
882 static struct attribute_group reipl_ccw_attr_group_lpar = {
883 .name = IPL_CCW_STR,
884 .attrs = reipl_ccw_attrs_lpar,
885 };
886
887
888 /* NSS reipl device attributes */
reipl_get_ascii_nss_name(char * dst,struct ipl_parameter_block * ipb)889 static void reipl_get_ascii_nss_name(char *dst,
890 struct ipl_parameter_block *ipb)
891 {
892 memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
893 EBCASC(dst, NSS_NAME_SIZE);
894 dst[NSS_NAME_SIZE] = 0;
895 }
896
reipl_nss_name_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)897 static ssize_t reipl_nss_name_show(struct kobject *kobj,
898 struct kobj_attribute *attr, char *page)
899 {
900 char nss_name[NSS_NAME_SIZE + 1] = {};
901
902 reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
903 return sprintf(page, "%s\n", nss_name);
904 }
905
reipl_nss_name_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)906 static ssize_t reipl_nss_name_store(struct kobject *kobj,
907 struct kobj_attribute *attr,
908 const char *buf, size_t len)
909 {
910 int nss_len;
911
912 /* ignore trailing newline */
913 nss_len = len;
914 if ((len > 0) && (buf[len - 1] == '\n'))
915 nss_len--;
916
917 if (nss_len > NSS_NAME_SIZE)
918 return -EINVAL;
919
920 memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
921 if (nss_len > 0) {
922 reipl_block_nss->ipl_info.ccw.vm_flags |=
923 DIAG308_VM_FLAGS_NSS_VALID;
924 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
925 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
926 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
927 } else {
928 reipl_block_nss->ipl_info.ccw.vm_flags &=
929 ~DIAG308_VM_FLAGS_NSS_VALID;
930 }
931
932 return len;
933 }
934
935 static struct kobj_attribute sys_reipl_nss_name_attr =
936 __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
937 reipl_nss_name_store);
938
939 static struct kobj_attribute sys_reipl_nss_loadparm_attr =
940 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
941 reipl_nss_loadparm_store);
942
943 static struct attribute *reipl_nss_attrs[] = {
944 &sys_reipl_nss_name_attr.attr,
945 &sys_reipl_nss_loadparm_attr.attr,
946 &sys_reipl_nss_vmparm_attr.attr,
947 NULL,
948 };
949
950 static struct attribute_group reipl_nss_attr_group = {
951 .name = IPL_NSS_STR,
952 .attrs = reipl_nss_attrs,
953 };
954
set_reipl_block_actual(struct ipl_parameter_block * reipl_block)955 static void set_reipl_block_actual(struct ipl_parameter_block *reipl_block)
956 {
957 reipl_block_actual = reipl_block;
958 os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual,
959 reipl_block->hdr.len);
960 }
961
962 /* reipl type */
963
reipl_set_type(enum ipl_type type)964 static int reipl_set_type(enum ipl_type type)
965 {
966 if (!(reipl_capabilities & type))
967 return -EINVAL;
968
969 switch(type) {
970 case IPL_TYPE_CCW:
971 if (diag308_set_works)
972 reipl_method = REIPL_METHOD_CCW_DIAG;
973 else if (MACHINE_IS_VM)
974 reipl_method = REIPL_METHOD_CCW_VM;
975 else
976 reipl_method = REIPL_METHOD_CCW_CIO;
977 set_reipl_block_actual(reipl_block_ccw);
978 break;
979 case IPL_TYPE_FCP:
980 if (diag308_set_works)
981 reipl_method = REIPL_METHOD_FCP_RW_DIAG;
982 else if (MACHINE_IS_VM)
983 reipl_method = REIPL_METHOD_FCP_RO_VM;
984 else
985 reipl_method = REIPL_METHOD_FCP_RO_DIAG;
986 set_reipl_block_actual(reipl_block_fcp);
987 break;
988 case IPL_TYPE_FCP_DUMP:
989 reipl_method = REIPL_METHOD_FCP_DUMP;
990 break;
991 case IPL_TYPE_NSS:
992 if (diag308_set_works)
993 reipl_method = REIPL_METHOD_NSS_DIAG;
994 else
995 reipl_method = REIPL_METHOD_NSS;
996 set_reipl_block_actual(reipl_block_nss);
997 break;
998 case IPL_TYPE_UNKNOWN:
999 reipl_method = REIPL_METHOD_DEFAULT;
1000 break;
1001 default:
1002 BUG();
1003 }
1004 reipl_type = type;
1005 return 0;
1006 }
1007
reipl_type_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)1008 static ssize_t reipl_type_show(struct kobject *kobj,
1009 struct kobj_attribute *attr, char *page)
1010 {
1011 return sprintf(page, "%s\n", ipl_type_str(reipl_type));
1012 }
1013
reipl_type_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)1014 static ssize_t reipl_type_store(struct kobject *kobj,
1015 struct kobj_attribute *attr,
1016 const char *buf, size_t len)
1017 {
1018 int rc = -EINVAL;
1019
1020 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1021 rc = reipl_set_type(IPL_TYPE_CCW);
1022 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1023 rc = reipl_set_type(IPL_TYPE_FCP);
1024 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1025 rc = reipl_set_type(IPL_TYPE_NSS);
1026 return (rc != 0) ? rc : len;
1027 }
1028
1029 static struct kobj_attribute reipl_type_attr =
1030 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
1031
1032 static struct kset *reipl_kset;
1033 static struct kset *reipl_fcp_kset;
1034
get_ipl_string(char * dst,struct ipl_parameter_block * ipb,const enum ipl_method m)1035 static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
1036 const enum ipl_method m)
1037 {
1038 char loadparm[LOADPARM_LEN + 1] = {};
1039 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
1040 char nss_name[NSS_NAME_SIZE + 1] = {};
1041 size_t pos = 0;
1042
1043 reipl_get_ascii_loadparm(loadparm, ipb);
1044 reipl_get_ascii_nss_name(nss_name, ipb);
1045 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
1046
1047 switch (m) {
1048 case REIPL_METHOD_CCW_VM:
1049 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
1050 break;
1051 case REIPL_METHOD_NSS:
1052 pos = sprintf(dst, "IPL %s", nss_name);
1053 break;
1054 default:
1055 break;
1056 }
1057 if (strlen(loadparm) > 0)
1058 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
1059 if (strlen(vmparm) > 0)
1060 sprintf(dst + pos, " PARM %s", vmparm);
1061 }
1062
__reipl_run(void * unused)1063 static void __reipl_run(void *unused)
1064 {
1065 struct ccw_dev_id devid;
1066 static char buf[128];
1067
1068 switch (reipl_method) {
1069 case REIPL_METHOD_CCW_CIO:
1070 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
1071 devid.ssid = 0;
1072 reipl_ccw_dev(&devid);
1073 break;
1074 case REIPL_METHOD_CCW_VM:
1075 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
1076 __cpcmd(buf, NULL, 0, NULL);
1077 break;
1078 case REIPL_METHOD_CCW_DIAG:
1079 diag308(DIAG308_SET, reipl_block_ccw);
1080 diag308(DIAG308_IPL, NULL);
1081 break;
1082 case REIPL_METHOD_FCP_RW_DIAG:
1083 diag308(DIAG308_SET, reipl_block_fcp);
1084 diag308(DIAG308_IPL, NULL);
1085 break;
1086 case REIPL_METHOD_FCP_RO_DIAG:
1087 diag308(DIAG308_IPL, NULL);
1088 break;
1089 case REIPL_METHOD_FCP_RO_VM:
1090 __cpcmd("IPL", NULL, 0, NULL);
1091 break;
1092 case REIPL_METHOD_NSS_DIAG:
1093 diag308(DIAG308_SET, reipl_block_nss);
1094 diag308(DIAG308_IPL, NULL);
1095 break;
1096 case REIPL_METHOD_NSS:
1097 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
1098 __cpcmd(buf, NULL, 0, NULL);
1099 break;
1100 case REIPL_METHOD_DEFAULT:
1101 if (MACHINE_IS_VM)
1102 __cpcmd("IPL", NULL, 0, NULL);
1103 diag308(DIAG308_IPL, NULL);
1104 break;
1105 case REIPL_METHOD_FCP_DUMP:
1106 break;
1107 }
1108 disabled_wait((unsigned long) __builtin_return_address(0));
1109 }
1110
reipl_run(struct shutdown_trigger * trigger)1111 static void reipl_run(struct shutdown_trigger *trigger)
1112 {
1113 smp_call_ipl_cpu(__reipl_run, NULL);
1114 }
1115
reipl_block_ccw_init(struct ipl_parameter_block * ipb)1116 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
1117 {
1118 ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
1119 ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1120 ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1121 ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1122 }
1123
reipl_block_ccw_fill_parms(struct ipl_parameter_block * ipb)1124 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1125 {
1126 /* LOADPARM */
1127 /* check if read scp info worked and set loadparm */
1128 if (sclp_ipl_info.is_valid)
1129 memcpy(ipb->ipl_info.ccw.load_parm,
1130 &sclp_ipl_info.loadparm, LOADPARM_LEN);
1131 else
1132 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1133 memset(ipb->ipl_info.ccw.load_parm, 0x40, LOADPARM_LEN);
1134 ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
1135
1136 /* VM PARM */
1137 if (MACHINE_IS_VM && diag308_set_works &&
1138 (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1139
1140 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1141 ipb->ipl_info.ccw.vm_parm_len =
1142 ipl_block.ipl_info.ccw.vm_parm_len;
1143 memcpy(ipb->ipl_info.ccw.vm_parm,
1144 ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1145 }
1146 }
1147
reipl_nss_init(void)1148 static int __init reipl_nss_init(void)
1149 {
1150 int rc;
1151
1152 if (!MACHINE_IS_VM)
1153 return 0;
1154
1155 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1156 if (!reipl_block_nss)
1157 return -ENOMEM;
1158
1159 if (!diag308_set_works)
1160 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO;
1161
1162 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1163 if (rc)
1164 return rc;
1165
1166 reipl_block_ccw_init(reipl_block_nss);
1167 if (ipl_info.type == IPL_TYPE_NSS) {
1168 memset(reipl_block_nss->ipl_info.ccw.nss_name,
1169 ' ', NSS_NAME_SIZE);
1170 memcpy(reipl_block_nss->ipl_info.ccw.nss_name,
1171 kernel_nss_name, strlen(kernel_nss_name));
1172 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
1173 reipl_block_nss->ipl_info.ccw.vm_flags |=
1174 DIAG308_VM_FLAGS_NSS_VALID;
1175
1176 reipl_block_ccw_fill_parms(reipl_block_nss);
1177 }
1178
1179 reipl_capabilities |= IPL_TYPE_NSS;
1180 return 0;
1181 }
1182
reipl_ccw_init(void)1183 static int __init reipl_ccw_init(void)
1184 {
1185 int rc;
1186
1187 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1188 if (!reipl_block_ccw)
1189 return -ENOMEM;
1190
1191 if (MACHINE_IS_VM) {
1192 if (!diag308_set_works)
1193 sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
1194 rc = sysfs_create_group(&reipl_kset->kobj,
1195 &reipl_ccw_attr_group_vm);
1196 } else {
1197 if(!diag308_set_works)
1198 sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
1199 rc = sysfs_create_group(&reipl_kset->kobj,
1200 &reipl_ccw_attr_group_lpar);
1201 }
1202 if (rc)
1203 return rc;
1204
1205 reipl_block_ccw_init(reipl_block_ccw);
1206 if (ipl_info.type == IPL_TYPE_CCW) {
1207 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
1208 reipl_block_ccw_fill_parms(reipl_block_ccw);
1209 }
1210
1211 reipl_capabilities |= IPL_TYPE_CCW;
1212 return 0;
1213 }
1214
reipl_fcp_init(void)1215 static int __init reipl_fcp_init(void)
1216 {
1217 int rc;
1218
1219 if (!diag308_set_works) {
1220 if (ipl_info.type == IPL_TYPE_FCP) {
1221 make_attrs_ro(reipl_fcp_attrs);
1222 sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO;
1223 } else
1224 return 0;
1225 }
1226
1227 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1228 if (!reipl_block_fcp)
1229 return -ENOMEM;
1230
1231 /* sysfs: create fcp kset for mixing attr group and bin attrs */
1232 reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1233 &reipl_kset->kobj);
1234 if (!reipl_fcp_kset) {
1235 free_page((unsigned long) reipl_block_fcp);
1236 return -ENOMEM;
1237 }
1238
1239 rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1240 if (rc) {
1241 kset_unregister(reipl_fcp_kset);
1242 free_page((unsigned long) reipl_block_fcp);
1243 return rc;
1244 }
1245
1246 rc = sysfs_create_bin_file(&reipl_fcp_kset->kobj,
1247 &sys_reipl_fcp_scp_data_attr);
1248 if (rc) {
1249 sysfs_remove_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1250 kset_unregister(reipl_fcp_kset);
1251 free_page((unsigned long) reipl_block_fcp);
1252 return rc;
1253 }
1254
1255 if (ipl_info.type == IPL_TYPE_FCP)
1256 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
1257 else {
1258 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1259 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1260 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1261 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1262 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1263 }
1264 reipl_capabilities |= IPL_TYPE_FCP;
1265 return 0;
1266 }
1267
reipl_type_init(void)1268 static int __init reipl_type_init(void)
1269 {
1270 enum ipl_type reipl_type = ipl_info.type;
1271 struct ipl_parameter_block *reipl_block;
1272 unsigned long size;
1273
1274 reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size);
1275 if (!reipl_block)
1276 goto out;
1277 /*
1278 * If we have an OS info reipl block, this will be used
1279 */
1280 if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_FCP) {
1281 memcpy(reipl_block_fcp, reipl_block, size);
1282 reipl_type = IPL_TYPE_FCP;
1283 } else if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_CCW) {
1284 memcpy(reipl_block_ccw, reipl_block, size);
1285 reipl_type = IPL_TYPE_CCW;
1286 }
1287 out:
1288 return reipl_set_type(reipl_type);
1289 }
1290
reipl_init(void)1291 static int __init reipl_init(void)
1292 {
1293 int rc;
1294
1295 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1296 if (!reipl_kset)
1297 return -ENOMEM;
1298 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1299 if (rc) {
1300 kset_unregister(reipl_kset);
1301 return rc;
1302 }
1303 rc = reipl_ccw_init();
1304 if (rc)
1305 return rc;
1306 rc = reipl_fcp_init();
1307 if (rc)
1308 return rc;
1309 rc = reipl_nss_init();
1310 if (rc)
1311 return rc;
1312 return reipl_type_init();
1313 }
1314
1315 static struct shutdown_action __refdata reipl_action = {
1316 .name = SHUTDOWN_ACTION_REIPL_STR,
1317 .fn = reipl_run,
1318 .init = reipl_init,
1319 };
1320
1321 /*
1322 * dump shutdown action: Dump Linux on shutdown.
1323 */
1324
1325 /* FCP dump device attributes */
1326
1327 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n",
1328 dump_block_fcp->ipl_info.fcp.wwpn);
1329 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n",
1330 dump_block_fcp->ipl_info.fcp.lun);
1331 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1332 dump_block_fcp->ipl_info.fcp.bootprog);
1333 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1334 dump_block_fcp->ipl_info.fcp.br_lba);
1335 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1336 dump_block_fcp->ipl_info.fcp.devno);
1337
1338 static struct attribute *dump_fcp_attrs[] = {
1339 &sys_dump_fcp_device_attr.attr,
1340 &sys_dump_fcp_wwpn_attr.attr,
1341 &sys_dump_fcp_lun_attr.attr,
1342 &sys_dump_fcp_bootprog_attr.attr,
1343 &sys_dump_fcp_br_lba_attr.attr,
1344 NULL,
1345 };
1346
1347 static struct attribute_group dump_fcp_attr_group = {
1348 .name = IPL_FCP_STR,
1349 .attrs = dump_fcp_attrs,
1350 };
1351
1352 /* CCW dump device attributes */
1353
1354 DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
1355 dump_block_ccw->ipl_info.ccw.devno);
1356
1357 static struct attribute *dump_ccw_attrs[] = {
1358 &sys_dump_ccw_device_attr.attr,
1359 NULL,
1360 };
1361
1362 static struct attribute_group dump_ccw_attr_group = {
1363 .name = IPL_CCW_STR,
1364 .attrs = dump_ccw_attrs,
1365 };
1366
1367 /* dump type */
1368
dump_set_type(enum dump_type type)1369 static int dump_set_type(enum dump_type type)
1370 {
1371 if (!(dump_capabilities & type))
1372 return -EINVAL;
1373 switch (type) {
1374 case DUMP_TYPE_CCW:
1375 if (diag308_set_works)
1376 dump_method = DUMP_METHOD_CCW_DIAG;
1377 else if (MACHINE_IS_VM)
1378 dump_method = DUMP_METHOD_CCW_VM;
1379 else
1380 dump_method = DUMP_METHOD_CCW_CIO;
1381 break;
1382 case DUMP_TYPE_FCP:
1383 dump_method = DUMP_METHOD_FCP_DIAG;
1384 break;
1385 default:
1386 dump_method = DUMP_METHOD_NONE;
1387 }
1388 dump_type = type;
1389 return 0;
1390 }
1391
dump_type_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)1392 static ssize_t dump_type_show(struct kobject *kobj,
1393 struct kobj_attribute *attr, char *page)
1394 {
1395 return sprintf(page, "%s\n", dump_type_str(dump_type));
1396 }
1397
dump_type_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)1398 static ssize_t dump_type_store(struct kobject *kobj,
1399 struct kobj_attribute *attr,
1400 const char *buf, size_t len)
1401 {
1402 int rc = -EINVAL;
1403
1404 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1405 rc = dump_set_type(DUMP_TYPE_NONE);
1406 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1407 rc = dump_set_type(DUMP_TYPE_CCW);
1408 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1409 rc = dump_set_type(DUMP_TYPE_FCP);
1410 return (rc != 0) ? rc : len;
1411 }
1412
1413 static struct kobj_attribute dump_type_attr =
1414 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1415
1416 static struct kset *dump_kset;
1417
__dump_run(void * unused)1418 static void __dump_run(void *unused)
1419 {
1420 struct ccw_dev_id devid;
1421 static char buf[100];
1422
1423 switch (dump_method) {
1424 case DUMP_METHOD_CCW_CIO:
1425 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
1426 devid.ssid = 0;
1427 reipl_ccw_dev(&devid);
1428 break;
1429 case DUMP_METHOD_CCW_VM:
1430 sprintf(buf, "STORE STATUS");
1431 __cpcmd(buf, NULL, 0, NULL);
1432 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
1433 __cpcmd(buf, NULL, 0, NULL);
1434 break;
1435 case DUMP_METHOD_CCW_DIAG:
1436 diag308(DIAG308_SET, dump_block_ccw);
1437 diag308(DIAG308_DUMP, NULL);
1438 break;
1439 case DUMP_METHOD_FCP_DIAG:
1440 diag308(DIAG308_SET, dump_block_fcp);
1441 diag308(DIAG308_DUMP, NULL);
1442 break;
1443 default:
1444 break;
1445 }
1446 }
1447
dump_run(struct shutdown_trigger * trigger)1448 static void dump_run(struct shutdown_trigger *trigger)
1449 {
1450 if (dump_method == DUMP_METHOD_NONE)
1451 return;
1452 smp_send_stop();
1453 smp_call_ipl_cpu(__dump_run, NULL);
1454 }
1455
dump_ccw_init(void)1456 static int __init dump_ccw_init(void)
1457 {
1458 int rc;
1459
1460 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1461 if (!dump_block_ccw)
1462 return -ENOMEM;
1463 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1464 if (rc) {
1465 free_page((unsigned long)dump_block_ccw);
1466 return rc;
1467 }
1468 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1469 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1470 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1471 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1472 dump_capabilities |= DUMP_TYPE_CCW;
1473 return 0;
1474 }
1475
dump_fcp_init(void)1476 static int __init dump_fcp_init(void)
1477 {
1478 int rc;
1479
1480 if (!sclp_ipl_info.has_dump)
1481 return 0; /* LDIPL DUMP is not installed */
1482 if (!diag308_set_works)
1483 return 0;
1484 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1485 if (!dump_block_fcp)
1486 return -ENOMEM;
1487 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1488 if (rc) {
1489 free_page((unsigned long)dump_block_fcp);
1490 return rc;
1491 }
1492 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1493 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1494 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1495 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1496 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1497 dump_capabilities |= DUMP_TYPE_FCP;
1498 return 0;
1499 }
1500
dump_init(void)1501 static int __init dump_init(void)
1502 {
1503 int rc;
1504
1505 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1506 if (!dump_kset)
1507 return -ENOMEM;
1508 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1509 if (rc) {
1510 kset_unregister(dump_kset);
1511 return rc;
1512 }
1513 rc = dump_ccw_init();
1514 if (rc)
1515 return rc;
1516 rc = dump_fcp_init();
1517 if (rc)
1518 return rc;
1519 dump_set_type(DUMP_TYPE_NONE);
1520 return 0;
1521 }
1522
1523 static struct shutdown_action __refdata dump_action = {
1524 .name = SHUTDOWN_ACTION_DUMP_STR,
1525 .fn = dump_run,
1526 .init = dump_init,
1527 };
1528
dump_reipl_run(struct shutdown_trigger * trigger)1529 static void dump_reipl_run(struct shutdown_trigger *trigger)
1530 {
1531 u32 csum;
1532
1533 csum = csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
1534 copy_to_absolute_zero(&S390_lowcore.ipib_checksum, &csum, sizeof(csum));
1535 copy_to_absolute_zero(&S390_lowcore.ipib, &reipl_block_actual,
1536 sizeof(reipl_block_actual));
1537 dump_run(trigger);
1538 }
1539
dump_reipl_init(void)1540 static int __init dump_reipl_init(void)
1541 {
1542 if (!diag308_set_works)
1543 return -EOPNOTSUPP;
1544 else
1545 return 0;
1546 }
1547
1548 static struct shutdown_action __refdata dump_reipl_action = {
1549 .name = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1550 .fn = dump_reipl_run,
1551 .init = dump_reipl_init,
1552 };
1553
1554 /*
1555 * vmcmd shutdown action: Trigger vm command on shutdown.
1556 */
1557
1558 static char vmcmd_on_reboot[128];
1559 static char vmcmd_on_panic[128];
1560 static char vmcmd_on_halt[128];
1561 static char vmcmd_on_poff[128];
1562 static char vmcmd_on_restart[128];
1563
1564 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1565 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1566 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1567 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1568 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1569
1570 static struct attribute *vmcmd_attrs[] = {
1571 &sys_vmcmd_on_reboot_attr.attr,
1572 &sys_vmcmd_on_panic_attr.attr,
1573 &sys_vmcmd_on_halt_attr.attr,
1574 &sys_vmcmd_on_poff_attr.attr,
1575 &sys_vmcmd_on_restart_attr.attr,
1576 NULL,
1577 };
1578
1579 static struct attribute_group vmcmd_attr_group = {
1580 .attrs = vmcmd_attrs,
1581 };
1582
1583 static struct kset *vmcmd_kset;
1584
vmcmd_run(struct shutdown_trigger * trigger)1585 static void vmcmd_run(struct shutdown_trigger *trigger)
1586 {
1587 char *cmd, *next_cmd;
1588
1589 if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1590 cmd = vmcmd_on_reboot;
1591 else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1592 cmd = vmcmd_on_panic;
1593 else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1594 cmd = vmcmd_on_halt;
1595 else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1596 cmd = vmcmd_on_poff;
1597 else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
1598 cmd = vmcmd_on_restart;
1599 else
1600 return;
1601
1602 if (strlen(cmd) == 0)
1603 return;
1604 do {
1605 next_cmd = strchr(cmd, '\n');
1606 if (next_cmd) {
1607 next_cmd[0] = 0;
1608 next_cmd += 1;
1609 }
1610 __cpcmd(cmd, NULL, 0, NULL);
1611 cmd = next_cmd;
1612 } while (cmd != NULL);
1613 }
1614
vmcmd_init(void)1615 static int vmcmd_init(void)
1616 {
1617 if (!MACHINE_IS_VM)
1618 return -EOPNOTSUPP;
1619 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1620 if (!vmcmd_kset)
1621 return -ENOMEM;
1622 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1623 }
1624
1625 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1626 vmcmd_run, vmcmd_init};
1627
1628 /*
1629 * stop shutdown action: Stop Linux on shutdown.
1630 */
1631
stop_run(struct shutdown_trigger * trigger)1632 static void stop_run(struct shutdown_trigger *trigger)
1633 {
1634 if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
1635 strcmp(trigger->name, ON_RESTART_STR) == 0)
1636 disabled_wait((unsigned long) __builtin_return_address(0));
1637 smp_stop_cpu();
1638 }
1639
1640 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1641 stop_run, NULL};
1642
1643 /* action list */
1644
1645 static struct shutdown_action *shutdown_actions_list[] = {
1646 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1647 &vmcmd_action, &stop_action};
1648 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1649
1650 /*
1651 * Trigger section
1652 */
1653
1654 static struct kset *shutdown_actions_kset;
1655
set_trigger(const char * buf,struct shutdown_trigger * trigger,size_t len)1656 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1657 size_t len)
1658 {
1659 int i;
1660
1661 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1662 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1663 if (shutdown_actions_list[i]->init_rc) {
1664 return shutdown_actions_list[i]->init_rc;
1665 } else {
1666 trigger->action = shutdown_actions_list[i];
1667 return len;
1668 }
1669 }
1670 }
1671 return -EINVAL;
1672 }
1673
1674 /* on reipl */
1675
1676 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1677 &reipl_action};
1678
on_reboot_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)1679 static ssize_t on_reboot_show(struct kobject *kobj,
1680 struct kobj_attribute *attr, char *page)
1681 {
1682 return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1683 }
1684
on_reboot_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)1685 static ssize_t on_reboot_store(struct kobject *kobj,
1686 struct kobj_attribute *attr,
1687 const char *buf, size_t len)
1688 {
1689 return set_trigger(buf, &on_reboot_trigger, len);
1690 }
1691
1692 static struct kobj_attribute on_reboot_attr =
1693 __ATTR(on_reboot, 0644, on_reboot_show, on_reboot_store);
1694
do_machine_restart(char * __unused)1695 static void do_machine_restart(char *__unused)
1696 {
1697 smp_send_stop();
1698 on_reboot_trigger.action->fn(&on_reboot_trigger);
1699 reipl_run(NULL);
1700 }
1701 void (*_machine_restart)(char *command) = do_machine_restart;
1702
1703 /* on panic */
1704
1705 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1706
on_panic_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)1707 static ssize_t on_panic_show(struct kobject *kobj,
1708 struct kobj_attribute *attr, char *page)
1709 {
1710 return sprintf(page, "%s\n", on_panic_trigger.action->name);
1711 }
1712
on_panic_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)1713 static ssize_t on_panic_store(struct kobject *kobj,
1714 struct kobj_attribute *attr,
1715 const char *buf, size_t len)
1716 {
1717 return set_trigger(buf, &on_panic_trigger, len);
1718 }
1719
1720 static struct kobj_attribute on_panic_attr =
1721 __ATTR(on_panic, 0644, on_panic_show, on_panic_store);
1722
do_panic(void)1723 static void do_panic(void)
1724 {
1725 lgr_info_log();
1726 on_panic_trigger.action->fn(&on_panic_trigger);
1727 stop_run(&on_panic_trigger);
1728 }
1729
1730 /* on restart */
1731
1732 static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
1733 &stop_action};
1734
on_restart_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)1735 static ssize_t on_restart_show(struct kobject *kobj,
1736 struct kobj_attribute *attr, char *page)
1737 {
1738 return sprintf(page, "%s\n", on_restart_trigger.action->name);
1739 }
1740
on_restart_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)1741 static ssize_t on_restart_store(struct kobject *kobj,
1742 struct kobj_attribute *attr,
1743 const char *buf, size_t len)
1744 {
1745 return set_trigger(buf, &on_restart_trigger, len);
1746 }
1747
1748 static struct kobj_attribute on_restart_attr =
1749 __ATTR(on_restart, 0644, on_restart_show, on_restart_store);
1750
__do_restart(void * ignore)1751 static void __do_restart(void *ignore)
1752 {
1753 smp_send_stop();
1754 #ifdef CONFIG_CRASH_DUMP
1755 crash_kexec(NULL);
1756 #endif
1757 on_restart_trigger.action->fn(&on_restart_trigger);
1758 stop_run(&on_restart_trigger);
1759 }
1760
do_restart(void)1761 void do_restart(void)
1762 {
1763 tracing_off();
1764 debug_locks_off();
1765 lgr_info_log();
1766 smp_call_online_cpu(__do_restart, NULL);
1767 }
1768
1769 /* on halt */
1770
1771 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1772
on_halt_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)1773 static ssize_t on_halt_show(struct kobject *kobj,
1774 struct kobj_attribute *attr, char *page)
1775 {
1776 return sprintf(page, "%s\n", on_halt_trigger.action->name);
1777 }
1778
on_halt_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)1779 static ssize_t on_halt_store(struct kobject *kobj,
1780 struct kobj_attribute *attr,
1781 const char *buf, size_t len)
1782 {
1783 return set_trigger(buf, &on_halt_trigger, len);
1784 }
1785
1786 static struct kobj_attribute on_halt_attr =
1787 __ATTR(on_halt, 0644, on_halt_show, on_halt_store);
1788
1789
do_machine_halt(void)1790 static void do_machine_halt(void)
1791 {
1792 smp_send_stop();
1793 on_halt_trigger.action->fn(&on_halt_trigger);
1794 stop_run(&on_halt_trigger);
1795 }
1796 void (*_machine_halt)(void) = do_machine_halt;
1797
1798 /* on power off */
1799
1800 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1801
on_poff_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)1802 static ssize_t on_poff_show(struct kobject *kobj,
1803 struct kobj_attribute *attr, char *page)
1804 {
1805 return sprintf(page, "%s\n", on_poff_trigger.action->name);
1806 }
1807
on_poff_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)1808 static ssize_t on_poff_store(struct kobject *kobj,
1809 struct kobj_attribute *attr,
1810 const char *buf, size_t len)
1811 {
1812 return set_trigger(buf, &on_poff_trigger, len);
1813 }
1814
1815 static struct kobj_attribute on_poff_attr =
1816 __ATTR(on_poff, 0644, on_poff_show, on_poff_store);
1817
1818
do_machine_power_off(void)1819 static void do_machine_power_off(void)
1820 {
1821 smp_send_stop();
1822 on_poff_trigger.action->fn(&on_poff_trigger);
1823 stop_run(&on_poff_trigger);
1824 }
1825 void (*_machine_power_off)(void) = do_machine_power_off;
1826
shutdown_triggers_init(void)1827 static void __init shutdown_triggers_init(void)
1828 {
1829 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1830 firmware_kobj);
1831 if (!shutdown_actions_kset)
1832 goto fail;
1833 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1834 &on_reboot_attr.attr))
1835 goto fail;
1836 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1837 &on_panic_attr.attr))
1838 goto fail;
1839 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1840 &on_halt_attr.attr))
1841 goto fail;
1842 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1843 &on_poff_attr.attr))
1844 goto fail;
1845 if (sysfs_create_file(&shutdown_actions_kset->kobj,
1846 &on_restart_attr.attr))
1847 goto fail;
1848 return;
1849 fail:
1850 panic("shutdown_triggers_init failed\n");
1851 }
1852
shutdown_actions_init(void)1853 static void __init shutdown_actions_init(void)
1854 {
1855 int i;
1856
1857 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1858 if (!shutdown_actions_list[i]->init)
1859 continue;
1860 shutdown_actions_list[i]->init_rc =
1861 shutdown_actions_list[i]->init();
1862 }
1863 }
1864
s390_ipl_init(void)1865 static int __init s390_ipl_init(void)
1866 {
1867 sclp_get_ipl_info(&sclp_ipl_info);
1868 shutdown_actions_init();
1869 shutdown_triggers_init();
1870 return 0;
1871 }
1872
1873 __initcall(s390_ipl_init);
1874
strncpy_skip_quote(char * dst,char * src,int n)1875 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1876 {
1877 int sx, dx;
1878
1879 dx = 0;
1880 for (sx = 0; src[sx] != 0; sx++) {
1881 if (src[sx] == '"')
1882 continue;
1883 dst[dx++] = src[sx];
1884 if (dx >= n)
1885 break;
1886 }
1887 }
1888
vmcmd_on_reboot_setup(char * str)1889 static int __init vmcmd_on_reboot_setup(char *str)
1890 {
1891 if (!MACHINE_IS_VM)
1892 return 1;
1893 strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1894 vmcmd_on_reboot[127] = 0;
1895 on_reboot_trigger.action = &vmcmd_action;
1896 return 1;
1897 }
1898 __setup("vmreboot=", vmcmd_on_reboot_setup);
1899
vmcmd_on_panic_setup(char * str)1900 static int __init vmcmd_on_panic_setup(char *str)
1901 {
1902 if (!MACHINE_IS_VM)
1903 return 1;
1904 strncpy_skip_quote(vmcmd_on_panic, str, 127);
1905 vmcmd_on_panic[127] = 0;
1906 on_panic_trigger.action = &vmcmd_action;
1907 return 1;
1908 }
1909 __setup("vmpanic=", vmcmd_on_panic_setup);
1910
vmcmd_on_halt_setup(char * str)1911 static int __init vmcmd_on_halt_setup(char *str)
1912 {
1913 if (!MACHINE_IS_VM)
1914 return 1;
1915 strncpy_skip_quote(vmcmd_on_halt, str, 127);
1916 vmcmd_on_halt[127] = 0;
1917 on_halt_trigger.action = &vmcmd_action;
1918 return 1;
1919 }
1920 __setup("vmhalt=", vmcmd_on_halt_setup);
1921
vmcmd_on_poff_setup(char * str)1922 static int __init vmcmd_on_poff_setup(char *str)
1923 {
1924 if (!MACHINE_IS_VM)
1925 return 1;
1926 strncpy_skip_quote(vmcmd_on_poff, str, 127);
1927 vmcmd_on_poff[127] = 0;
1928 on_poff_trigger.action = &vmcmd_action;
1929 return 1;
1930 }
1931 __setup("vmpoff=", vmcmd_on_poff_setup);
1932
on_panic_notify(struct notifier_block * self,unsigned long event,void * data)1933 static int on_panic_notify(struct notifier_block *self,
1934 unsigned long event, void *data)
1935 {
1936 do_panic();
1937 return NOTIFY_OK;
1938 }
1939
1940 static struct notifier_block on_panic_nb = {
1941 .notifier_call = on_panic_notify,
1942 .priority = INT_MIN,
1943 };
1944
setup_ipl(void)1945 void __init setup_ipl(void)
1946 {
1947 ipl_info.type = get_ipl_type();
1948 switch (ipl_info.type) {
1949 case IPL_TYPE_CCW:
1950 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1951 ipl_info.data.ccw.dev_id.ssid = 0;
1952 break;
1953 case IPL_TYPE_FCP:
1954 case IPL_TYPE_FCP_DUMP:
1955 ipl_info.data.fcp.dev_id.devno =
1956 IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1957 ipl_info.data.fcp.dev_id.ssid = 0;
1958 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1959 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1960 break;
1961 case IPL_TYPE_NSS:
1962 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1963 sizeof(ipl_info.data.nss.name));
1964 break;
1965 case IPL_TYPE_UNKNOWN:
1966 /* We have no info to copy */
1967 break;
1968 }
1969 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1970 }
1971
ipl_update_parameters(void)1972 void __init ipl_update_parameters(void)
1973 {
1974 int rc;
1975
1976 rc = diag308(DIAG308_STORE, &ipl_block);
1977 if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
1978 diag308_set_works = 1;
1979 }
1980
ipl_save_parameters(void)1981 void __init ipl_save_parameters(void)
1982 {
1983 struct cio_iplinfo iplinfo;
1984 void *src, *dst;
1985
1986 if (cio_get_iplinfo(&iplinfo))
1987 return;
1988
1989 ipl_devno = iplinfo.devno;
1990 ipl_flags |= IPL_DEVNO_VALID;
1991 if (!iplinfo.is_qdio)
1992 return;
1993 ipl_flags |= IPL_PARMBLOCK_VALID;
1994 src = (void *)(unsigned long)S390_lowcore.ipl_parmblock_ptr;
1995 dst = (void *)IPL_PARMBLOCK_ORIGIN;
1996 memmove(dst, src, PAGE_SIZE);
1997 S390_lowcore.ipl_parmblock_ptr = IPL_PARMBLOCK_ORIGIN;
1998 }
1999
2000 static LIST_HEAD(rcall);
2001 static DEFINE_MUTEX(rcall_mutex);
2002
register_reset_call(struct reset_call * reset)2003 void register_reset_call(struct reset_call *reset)
2004 {
2005 mutex_lock(&rcall_mutex);
2006 list_add(&reset->list, &rcall);
2007 mutex_unlock(&rcall_mutex);
2008 }
2009 EXPORT_SYMBOL_GPL(register_reset_call);
2010
unregister_reset_call(struct reset_call * reset)2011 void unregister_reset_call(struct reset_call *reset)
2012 {
2013 mutex_lock(&rcall_mutex);
2014 list_del(&reset->list);
2015 mutex_unlock(&rcall_mutex);
2016 }
2017 EXPORT_SYMBOL_GPL(unregister_reset_call);
2018
do_reset_calls(void)2019 static void do_reset_calls(void)
2020 {
2021 struct reset_call *reset;
2022
2023 #ifdef CONFIG_64BIT
2024 if (diag308_set_works) {
2025 diag308_reset();
2026 return;
2027 }
2028 #endif
2029 list_for_each_entry(reset, &rcall, list)
2030 reset->fn();
2031 }
2032
2033 u32 dump_prefix_page;
2034
s390_reset_system(void (* func)(void *),void * data)2035 void s390_reset_system(void (*func)(void *), void *data)
2036 {
2037 struct _lowcore *lc;
2038
2039 lc = (struct _lowcore *)(unsigned long) store_prefix();
2040
2041 /* Stack for interrupt/machine check handler */
2042 lc->panic_stack = S390_lowcore.panic_stack;
2043
2044 /* Save prefix page address for dump case */
2045 dump_prefix_page = (u32)(unsigned long) lc;
2046
2047 /* Disable prefixing */
2048 set_prefix(0);
2049
2050 /* Disable lowcore protection */
2051 __ctl_clear_bit(0,28);
2052
2053 /* Set new machine check handler */
2054 S390_lowcore.mcck_new_psw.mask = psw_kernel_bits | PSW_MASK_DAT;
2055 S390_lowcore.mcck_new_psw.addr =
2056 PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;
2057
2058 /* Set new program check handler */
2059 S390_lowcore.program_new_psw.mask = psw_kernel_bits | PSW_MASK_DAT;
2060 S390_lowcore.program_new_psw.addr =
2061 PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
2062
2063 /* Store status at absolute zero */
2064 store_status();
2065
2066 do_reset_calls();
2067 if (func)
2068 func(data);
2069 }
2070