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Linux 4.11-rc5
[linux/fpc-iii.git] / arch / s390 / kernel / ipl.c
blobe545ffe5155ab0179327cfe4f9f66e677c604041
1 /*
2 * ipl/reipl/dump support for Linux on s390.
3 *
4 * Copyright IBM Corp. 2005, 2012
5 * Author(s): Michael Holzheu <holzheu@de.ibm.com>
6 * Heiko Carstens <heiko.carstens@de.ibm.com>
7 * Volker Sameske <sameske@de.ibm.com>
8 */
9
10 #include <linux/types.h>
11 #include <linux/export.h>
12 #include <linux/init.h>
13 #include <linux/device.h>
14 #include <linux/delay.h>
15 #include <linux/reboot.h>
16 #include <linux/ctype.h>
17 #include <linux/fs.h>
18 #include <linux/gfp.h>
19 #include <linux/crash_dump.h>
20 #include <linux/debug_locks.h>
21 #include <asm/diag.h>
22 #include <asm/ipl.h>
23 #include <asm/smp.h>
24 #include <asm/setup.h>
25 #include <asm/cpcmd.h>
26 #include <asm/cio.h>
27 #include <asm/ebcdic.h>
28 #include <asm/reset.h>
29 #include <asm/sclp.h>
30 #include <asm/checksum.h>
31 #include <asm/debug.h>
32 #include <asm/os_info.h>
33 #include "entry.h"
34
35 #define IPL_PARM_BLOCK_VERSION 0
36
37 #define IPL_UNKNOWN_STR "unknown"
38 #define IPL_CCW_STR "ccw"
39 #define IPL_FCP_STR "fcp"
40 #define IPL_FCP_DUMP_STR "fcp_dump"
41 #define IPL_NSS_STR "nss"
42
43 #define DUMP_CCW_STR "ccw"
44 #define DUMP_FCP_STR "fcp"
45 #define DUMP_NONE_STR "none"
46
47 /*
48 * Four shutdown trigger types are supported:
49 * - panic
50 * - halt
51 * - power off
52 * - reipl
53 * - restart
54 */
55 #define ON_PANIC_STR "on_panic"
56 #define ON_HALT_STR "on_halt"
57 #define ON_POFF_STR "on_poff"
58 #define ON_REIPL_STR "on_reboot"
59 #define ON_RESTART_STR "on_restart"
60
61 struct shutdown_action;
62 struct shutdown_trigger {
63 char *name;
64 struct shutdown_action *action;
65 };
66
67 /*
68 * The following shutdown action types are supported:
69 */
70 #define SHUTDOWN_ACTION_IPL_STR "ipl"
71 #define SHUTDOWN_ACTION_REIPL_STR "reipl"
72 #define SHUTDOWN_ACTION_DUMP_STR "dump"
73 #define SHUTDOWN_ACTION_VMCMD_STR "vmcmd"
74 #define SHUTDOWN_ACTION_STOP_STR "stop"
75 #define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl"
76
77 struct shutdown_action {
78 char *name;
79 void (*fn) (struct shutdown_trigger *trigger);
80 int (*init) (void);
81 int init_rc;
82 };
83
84 static char *ipl_type_str(enum ipl_type type)
85 {
86 switch (type) {
87 case IPL_TYPE_CCW:
88 return IPL_CCW_STR;
89 case IPL_TYPE_FCP:
90 return IPL_FCP_STR;
91 case IPL_TYPE_FCP_DUMP:
92 return IPL_FCP_DUMP_STR;
93 case IPL_TYPE_NSS:
94 return IPL_NSS_STR;
95 case IPL_TYPE_UNKNOWN:
96 default:
97 return IPL_UNKNOWN_STR;
98 }
99 }
100
101 enum dump_type {
102 DUMP_TYPE_NONE = 1,
103 DUMP_TYPE_CCW = 2,
104 DUMP_TYPE_FCP = 4,
105 };
106
107 static char *dump_type_str(enum dump_type type)
108 {
109 switch (type) {
110 case DUMP_TYPE_NONE:
111 return DUMP_NONE_STR;
112 case DUMP_TYPE_CCW:
113 return DUMP_CCW_STR;
114 case DUMP_TYPE_FCP:
115 return DUMP_FCP_STR;
116 default:
117 return NULL;
118 }
119 }
120
121 /*
122 * Must be in data section since the bss section
123 * is not cleared when these are accessed.
124 */
125 static u8 ipl_ssid __section(.data) = 0;
126 static u16 ipl_devno __section(.data) = 0;
127 u32 ipl_flags __section(.data) = 0;
128
129 enum ipl_method {
130 REIPL_METHOD_CCW_CIO,
131 REIPL_METHOD_CCW_DIAG,
132 REIPL_METHOD_CCW_VM,
133 REIPL_METHOD_FCP_RO_DIAG,
134 REIPL_METHOD_FCP_RW_DIAG,
135 REIPL_METHOD_FCP_RO_VM,
136 REIPL_METHOD_FCP_DUMP,
137 REIPL_METHOD_NSS,
138 REIPL_METHOD_NSS_DIAG,
139 REIPL_METHOD_DEFAULT,
140 };
141
142 enum dump_method {
143 DUMP_METHOD_NONE,
144 DUMP_METHOD_CCW_CIO,
145 DUMP_METHOD_CCW_DIAG,
146 DUMP_METHOD_CCW_VM,
147 DUMP_METHOD_FCP_DIAG,
148 };
149
150 static int diag308_set_works = 0;
151
152 static struct ipl_parameter_block ipl_block;
153
154 static int reipl_capabilities = IPL_TYPE_UNKNOWN;
155
156 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
157 static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
158 static struct ipl_parameter_block *reipl_block_fcp;
159 static struct ipl_parameter_block *reipl_block_ccw;
160 static struct ipl_parameter_block *reipl_block_nss;
161 static struct ipl_parameter_block *reipl_block_actual;
162
163 static int dump_capabilities = DUMP_TYPE_NONE;
164 static enum dump_type dump_type = DUMP_TYPE_NONE;
165 static enum dump_method dump_method = DUMP_METHOD_NONE;
166 static struct ipl_parameter_block *dump_block_fcp;
167 static struct ipl_parameter_block *dump_block_ccw;
168
169 static struct sclp_ipl_info sclp_ipl_info;
170
171 static inline int __diag308(unsigned long subcode, void *addr)
172 {
173 register unsigned long _addr asm("0") = (unsigned long) addr;
174 register unsigned long _rc asm("1") = 0;
175
176 asm volatile(
177 " diag %0,%2,0x308\n"
178 "0: nopr %%r7\n"
179 EX_TABLE(0b,0b)
180 : "+d" (_addr), "+d" (_rc)
181 : "d" (subcode) : "cc", "memory");
182 return _rc;
183 }
184
185 int diag308(unsigned long subcode, void *addr)
186 {
187 diag_stat_inc(DIAG_STAT_X308);
188 return __diag308(subcode, addr);
189 }
190 EXPORT_SYMBOL_GPL(diag308);
191
192 /* SYSFS */
193
194 #define IPL_ATTR_SHOW_FN(_prefix, _name, _format, args...) \
195 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
196 struct kobj_attribute *attr, \
197 char *page) \
198 { \
199 return snprintf(page, PAGE_SIZE, _format, ##args); \
200 }
201
202 #define IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk) \
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 ssid, devno; \
208 \
209 if (sscanf(buf, "0.%llx.%llx\n", &ssid, &devno) != 2) \
210 return -EINVAL; \
211 \
212 if (ssid > __MAX_SSID || devno > __MAX_SUBCHANNEL) \
213 return -EINVAL; \
214 \
215 _ipl_blk.ssid = ssid; \
216 _ipl_blk.devno = devno; \
217 return len; \
218 }
219
220 #define DEFINE_IPL_CCW_ATTR_RW(_prefix, _name, _ipl_blk) \
221 IPL_ATTR_SHOW_FN(_prefix, _name, "0.%x.%04x\n", \
222 _ipl_blk.ssid, _ipl_blk.devno); \
223 IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk); \
224 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
225 __ATTR(_name, (S_IRUGO | S_IWUSR), \
226 sys_##_prefix##_##_name##_show, \
227 sys_##_prefix##_##_name##_store) \
228
229 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
230 IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value) \
231 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
232 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL)
233
234 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
235 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value) \
236 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
237 struct kobj_attribute *attr, \
238 const char *buf, size_t len) \
239 { \
240 unsigned long long value; \
241 if (sscanf(buf, _fmt_in, &value) != 1) \
242 return -EINVAL; \
243 _value = value; \
244 return len; \
245 } \
246 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
247 __ATTR(_name,(S_IRUGO | S_IWUSR), \
248 sys_##_prefix##_##_name##_show, \
249 sys_##_prefix##_##_name##_store)
250
251 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
252 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, _value) \
253 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
254 struct kobj_attribute *attr, \
255 const char *buf, size_t len) \
256 { \
257 strncpy(_value, buf, sizeof(_value) - 1); \
258 strim(_value); \
259 return len; \
260 } \
261 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
262 __ATTR(_name,(S_IRUGO | S_IWUSR), \
263 sys_##_prefix##_##_name##_show, \
264 sys_##_prefix##_##_name##_store)
265
266 static void make_attrs_ro(struct attribute **attrs)
267 {
268 while (*attrs) {
269 (*attrs)->mode = S_IRUGO;
270 attrs++;
271 }
272 }
273
274 /*
275 * ipl section
276 */
277
278 static __init enum ipl_type get_ipl_type(void)
279 {
280 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
281
282 if (ipl_flags & IPL_NSS_VALID)
283 return IPL_TYPE_NSS;
284 if (!(ipl_flags & IPL_DEVNO_VALID))
285 return IPL_TYPE_UNKNOWN;
286 if (!(ipl_flags & IPL_PARMBLOCK_VALID))
287 return IPL_TYPE_CCW;
288 if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
289 return IPL_TYPE_UNKNOWN;
290 if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
291 return IPL_TYPE_UNKNOWN;
292 if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
293 return IPL_TYPE_FCP_DUMP;
294 return IPL_TYPE_FCP;
295 }
296
297 struct ipl_info ipl_info;
298 EXPORT_SYMBOL_GPL(ipl_info);
299
300 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
301 char *page)
302 {
303 return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
304 }
305
306 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
307
308 /* VM IPL PARM routines */
309 static size_t reipl_get_ascii_vmparm(char *dest, size_t size,
310 const struct ipl_parameter_block *ipb)
311 {
312 int i;
313 size_t len;
314 char has_lowercase = 0;
315
316 len = 0;
317 if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
318 (ipb->ipl_info.ccw.vm_parm_len > 0)) {
319
320 len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
321 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
322 /* If at least one character is lowercase, we assume mixed
323 * case; otherwise we convert everything to lowercase.
324 */
325 for (i = 0; i < len; i++)
326 if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
327 (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
328 (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
329 has_lowercase = 1;
330 break;
331 }
332 if (!has_lowercase)
333 EBC_TOLOWER(dest, len);
334 EBCASC(dest, len);
335 }
336 dest[len] = 0;
337
338 return len;
339 }
340
341 size_t append_ipl_vmparm(char *dest, size_t size)
342 {
343 size_t rc;
344
345 rc = 0;
346 if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
347 rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
348 else
349 dest[0] = 0;
350 return rc;
351 }
352
353 static ssize_t ipl_vm_parm_show(struct kobject *kobj,
354 struct kobj_attribute *attr, char *page)
355 {
356 char parm[DIAG308_VMPARM_SIZE + 1] = {};
357
358 append_ipl_vmparm(parm, sizeof(parm));
359 return sprintf(page, "%s\n", parm);
360 }
361
362 static size_t scpdata_length(const char* buf, size_t count)
363 {
364 while (count) {
365 if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
366 break;
367 count--;
368 }
369 return count;
370 }
371
372 static size_t reipl_append_ascii_scpdata(char *dest, size_t size,
373 const struct ipl_parameter_block *ipb)
374 {
375 size_t count;
376 size_t i;
377 int has_lowercase;
378
379 count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data,
380 ipb->ipl_info.fcp.scp_data_len));
381 if (!count)
382 goto out;
383
384 has_lowercase = 0;
385 for (i = 0; i < count; i++) {
386 if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
387 count = 0;
388 goto out;
389 }
390 if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
391 has_lowercase = 1;
392 }
393
394 if (has_lowercase)
395 memcpy(dest, ipb->ipl_info.fcp.scp_data, count);
396 else
397 for (i = 0; i < count; i++)
398 dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]);
399 out:
400 dest[count] = '\0';
401 return count;
402 }
403
404 size_t append_ipl_scpdata(char *dest, size_t len)
405 {
406 size_t rc;
407
408 rc = 0;
409 if (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP)
410 rc = reipl_append_ascii_scpdata(dest, len, &ipl_block);
411 else
412 dest[0] = 0;
413 return rc;
414 }
415
416
417 static struct kobj_attribute sys_ipl_vm_parm_attr =
418 __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
419
420 static ssize_t sys_ipl_device_show(struct kobject *kobj,
421 struct kobj_attribute *attr, char *page)
422 {
423 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
424
425 switch (ipl_info.type) {
426 case IPL_TYPE_CCW:
427 return sprintf(page, "0.%x.%04x\n", ipl_ssid, ipl_devno);
428 case IPL_TYPE_FCP:
429 case IPL_TYPE_FCP_DUMP:
430 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
431 default:
432 return 0;
433 }
434 }
435
436 static struct kobj_attribute sys_ipl_device_attr =
437 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
438
439 static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
440 struct bin_attribute *attr, char *buf,
441 loff_t off, size_t count)
442 {
443 return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START,
444 IPL_PARMBLOCK_SIZE);
445 }
446 static struct bin_attribute ipl_parameter_attr =
447 __BIN_ATTR(binary_parameter, S_IRUGO, ipl_parameter_read, NULL,
448 PAGE_SIZE);
449
450 static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
451 struct bin_attribute *attr, char *buf,
452 loff_t off, size_t count)
453 {
454 unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
455 void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
456
457 return memory_read_from_buffer(buf, count, &off, scp_data, size);
458 }
459 static struct bin_attribute ipl_scp_data_attr =
460 __BIN_ATTR(scp_data, S_IRUGO, ipl_scp_data_read, NULL, PAGE_SIZE);
461
462 static struct bin_attribute *ipl_fcp_bin_attrs[] = {
463 &ipl_parameter_attr,
464 &ipl_scp_data_attr,
465 NULL,
466 };
467
468 /* FCP ipl device attributes */
469
470 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
471 IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
472 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
473 IPL_PARMBLOCK_START->ipl_info.fcp.lun);
474 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
475 IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
476 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
477 IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
478
479 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
480 struct kobj_attribute *attr, char *page)
481 {
482 char loadparm[LOADPARM_LEN + 1] = {};
483
484 if (!sclp_ipl_info.is_valid)
485 return sprintf(page, "#unknown#\n");
486 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
487 EBCASC(loadparm, LOADPARM_LEN);
488 strim(loadparm);
489 return sprintf(page, "%s\n", loadparm);
490 }
491
492 static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
493 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
494
495 static struct attribute *ipl_fcp_attrs[] = {
496 &sys_ipl_type_attr.attr,
497 &sys_ipl_device_attr.attr,
498 &sys_ipl_fcp_wwpn_attr.attr,
499 &sys_ipl_fcp_lun_attr.attr,
500 &sys_ipl_fcp_bootprog_attr.attr,
501 &sys_ipl_fcp_br_lba_attr.attr,
502 &sys_ipl_ccw_loadparm_attr.attr,
503 NULL,
504 };
505
506 static struct attribute_group ipl_fcp_attr_group = {
507 .attrs = ipl_fcp_attrs,
508 .bin_attrs = ipl_fcp_bin_attrs,
509 };
510
511 /* CCW ipl device attributes */
512
513 static struct attribute *ipl_ccw_attrs_vm[] = {
514 &sys_ipl_type_attr.attr,
515 &sys_ipl_device_attr.attr,
516 &sys_ipl_ccw_loadparm_attr.attr,
517 &sys_ipl_vm_parm_attr.attr,
518 NULL,
519 };
520
521 static struct attribute *ipl_ccw_attrs_lpar[] = {
522 &sys_ipl_type_attr.attr,
523 &sys_ipl_device_attr.attr,
524 &sys_ipl_ccw_loadparm_attr.attr,
525 NULL,
526 };
527
528 static struct attribute_group ipl_ccw_attr_group_vm = {
529 .attrs = ipl_ccw_attrs_vm,
530 };
531
532 static struct attribute_group ipl_ccw_attr_group_lpar = {
533 .attrs = ipl_ccw_attrs_lpar
534 };
535
536 /* NSS ipl device attributes */
537
538 DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
539
540 static struct attribute *ipl_nss_attrs[] = {
541 &sys_ipl_type_attr.attr,
542 &sys_ipl_nss_name_attr.attr,
543 &sys_ipl_ccw_loadparm_attr.attr,
544 &sys_ipl_vm_parm_attr.attr,
545 NULL,
546 };
547
548 static struct attribute_group ipl_nss_attr_group = {
549 .attrs = ipl_nss_attrs,
550 };
551
552 /* UNKNOWN ipl device attributes */
553
554 static struct attribute *ipl_unknown_attrs[] = {
555 &sys_ipl_type_attr.attr,
556 NULL,
557 };
558
559 static struct attribute_group ipl_unknown_attr_group = {
560 .attrs = ipl_unknown_attrs,
561 };
562
563 static struct kset *ipl_kset;
564
565 static void __ipl_run(void *unused)
566 {
567 if (MACHINE_IS_LPAR && ipl_info.type == IPL_TYPE_CCW)
568 diag308(DIAG308_LOAD_NORMAL_DUMP, NULL);
569 diag308(DIAG308_LOAD_CLEAR, NULL);
570 if (MACHINE_IS_VM)
571 __cpcmd("IPL", NULL, 0, NULL);
572 else if (ipl_info.type == IPL_TYPE_CCW)
573 reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
574 }
575
576 static void ipl_run(struct shutdown_trigger *trigger)
577 {
578 smp_call_ipl_cpu(__ipl_run, NULL);
579 }
580
581 static int __init ipl_init(void)
582 {
583 int rc;
584
585 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
586 if (!ipl_kset) {
587 rc = -ENOMEM;
588 goto out;
589 }
590 switch (ipl_info.type) {
591 case IPL_TYPE_CCW:
592 if (MACHINE_IS_VM)
593 rc = sysfs_create_group(&ipl_kset->kobj,
594 &ipl_ccw_attr_group_vm);
595 else
596 rc = sysfs_create_group(&ipl_kset->kobj,
597 &ipl_ccw_attr_group_lpar);
598 break;
599 case IPL_TYPE_FCP:
600 case IPL_TYPE_FCP_DUMP:
601 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
602 break;
603 case IPL_TYPE_NSS:
604 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group);
605 break;
606 default:
607 rc = sysfs_create_group(&ipl_kset->kobj,
608 &ipl_unknown_attr_group);
609 break;
610 }
611 out:
612 if (rc)
613 panic("ipl_init failed: rc = %i\n", rc);
614
615 return 0;
616 }
617
618 static struct shutdown_action __refdata ipl_action = {
619 .name = SHUTDOWN_ACTION_IPL_STR,
620 .fn = ipl_run,
621 .init = ipl_init,
622 };
623
624 /*
625 * reipl shutdown action: Reboot Linux on shutdown.
626 */
627
628 /* VM IPL PARM attributes */
629 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
630 char *page)
631 {
632 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
633
634 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
635 return sprintf(page, "%s\n", vmparm);
636 }
637
638 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
639 size_t vmparm_max,
640 const char *buf, size_t len)
641 {
642 int i, ip_len;
643
644 /* ignore trailing newline */
645 ip_len = len;
646 if ((len > 0) && (buf[len - 1] == '\n'))
647 ip_len--;
648
649 if (ip_len > vmparm_max)
650 return -EINVAL;
651
652 /* parm is used to store kernel options, check for common chars */
653 for (i = 0; i < ip_len; i++)
654 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
655 return -EINVAL;
656
657 memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
658 ipb->ipl_info.ccw.vm_parm_len = ip_len;
659 if (ip_len > 0) {
660 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
661 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
662 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
663 } else {
664 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
665 }
666
667 return len;
668 }
669
670 /* NSS wrapper */
671 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
672 struct kobj_attribute *attr, char *page)
673 {
674 return reipl_generic_vmparm_show(reipl_block_nss, page);
675 }
676
677 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
678 struct kobj_attribute *attr,
679 const char *buf, size_t len)
680 {
681 return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
682 }
683
684 /* CCW wrapper */
685 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
686 struct kobj_attribute *attr, char *page)
687 {
688 return reipl_generic_vmparm_show(reipl_block_ccw, page);
689 }
690
691 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
692 struct kobj_attribute *attr,
693 const char *buf, size_t len)
694 {
695 return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
696 }
697
698 static struct kobj_attribute sys_reipl_nss_vmparm_attr =
699 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
700 reipl_nss_vmparm_store);
701 static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
702 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
703 reipl_ccw_vmparm_store);
704
705 /* FCP reipl device attributes */
706
707 static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
708 struct bin_attribute *attr,
709 char *buf, loff_t off, size_t count)
710 {
711 size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
712 void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
713
714 return memory_read_from_buffer(buf, count, &off, scp_data, size);
715 }
716
717 static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
718 struct bin_attribute *attr,
719 char *buf, loff_t off, size_t count)
720 {
721 size_t scpdata_len = count;
722 size_t padding;
723
724
725 if (off)
726 return -EINVAL;
727
728 memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf, count);
729 if (scpdata_len % 8) {
730 padding = 8 - (scpdata_len % 8);
731 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
732 0, padding);
733 scpdata_len += padding;
734 }
735
736 reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
737 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
738 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
739
740 return count;
741 }
742 static struct bin_attribute sys_reipl_fcp_scp_data_attr =
743 __BIN_ATTR(scp_data, (S_IRUGO | S_IWUSR), reipl_fcp_scpdata_read,
744 reipl_fcp_scpdata_write, DIAG308_SCPDATA_SIZE);
745
746 static struct bin_attribute *reipl_fcp_bin_attrs[] = {
747 &sys_reipl_fcp_scp_data_attr,
748 NULL,
749 };
750
751 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n",
752 reipl_block_fcp->ipl_info.fcp.wwpn);
753 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n",
754 reipl_block_fcp->ipl_info.fcp.lun);
755 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
756 reipl_block_fcp->ipl_info.fcp.bootprog);
757 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
758 reipl_block_fcp->ipl_info.fcp.br_lba);
759 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
760 reipl_block_fcp->ipl_info.fcp.devno);
761
762 static void reipl_get_ascii_loadparm(char *loadparm,
763 struct ipl_parameter_block *ibp)
764 {
765 memcpy(loadparm, ibp->hdr.loadparm, LOADPARM_LEN);
766 EBCASC(loadparm, LOADPARM_LEN);
767 loadparm[LOADPARM_LEN] = 0;
768 strim(loadparm);
769 }
770
771 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
772 char *page)
773 {
774 char buf[LOADPARM_LEN + 1];
775
776 reipl_get_ascii_loadparm(buf, ipb);
777 return sprintf(page, "%s\n", buf);
778 }
779
780 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
781 const char *buf, size_t len)
782 {
783 int i, lp_len;
784
785 /* ignore trailing newline */
786 lp_len = len;
787 if ((len > 0) && (buf[len - 1] == '\n'))
788 lp_len--;
789 /* loadparm can have max 8 characters and must not start with a blank */
790 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
791 return -EINVAL;
792 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
793 for (i = 0; i < lp_len; i++) {
794 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
795 (buf[i] == '.'))
796 continue;
797 return -EINVAL;
798 }
799 /* initialize loadparm with blanks */
800 memset(ipb->hdr.loadparm, ' ', LOADPARM_LEN);
801 /* copy and convert to ebcdic */
802 memcpy(ipb->hdr.loadparm, buf, lp_len);
803 ASCEBC(ipb->hdr.loadparm, LOADPARM_LEN);
804 return len;
805 }
806
807 /* FCP wrapper */
808 static ssize_t reipl_fcp_loadparm_show(struct kobject *kobj,
809 struct kobj_attribute *attr, char *page)
810 {
811 return reipl_generic_loadparm_show(reipl_block_fcp, page);
812 }
813
814 static ssize_t reipl_fcp_loadparm_store(struct kobject *kobj,
815 struct kobj_attribute *attr,
816 const char *buf, size_t len)
817 {
818 return reipl_generic_loadparm_store(reipl_block_fcp, buf, len);
819 }
820
821 static struct kobj_attribute sys_reipl_fcp_loadparm_attr =
822 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_fcp_loadparm_show,
823 reipl_fcp_loadparm_store);
824
825 static struct attribute *reipl_fcp_attrs[] = {
826 &sys_reipl_fcp_device_attr.attr,
827 &sys_reipl_fcp_wwpn_attr.attr,
828 &sys_reipl_fcp_lun_attr.attr,
829 &sys_reipl_fcp_bootprog_attr.attr,
830 &sys_reipl_fcp_br_lba_attr.attr,
831 &sys_reipl_fcp_loadparm_attr.attr,
832 NULL,
833 };
834
835 static struct attribute_group reipl_fcp_attr_group = {
836 .attrs = reipl_fcp_attrs,
837 .bin_attrs = reipl_fcp_bin_attrs,
838 };
839
840 /* CCW reipl device attributes */
841 DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ipl_info.ccw);
842
843 /* NSS wrapper */
844 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
845 struct kobj_attribute *attr, char *page)
846 {
847 return reipl_generic_loadparm_show(reipl_block_nss, page);
848 }
849
850 static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
851 struct kobj_attribute *attr,
852 const char *buf, size_t len)
853 {
854 return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
855 }
856
857 /* CCW wrapper */
858 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
859 struct kobj_attribute *attr, char *page)
860 {
861 return reipl_generic_loadparm_show(reipl_block_ccw, page);
862 }
863
864 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
865 struct kobj_attribute *attr,
866 const char *buf, size_t len)
867 {
868 return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
869 }
870
871 static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
872 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
873 reipl_ccw_loadparm_store);
874
875 static struct attribute *reipl_ccw_attrs_vm[] = {
876 &sys_reipl_ccw_device_attr.attr,
877 &sys_reipl_ccw_loadparm_attr.attr,
878 &sys_reipl_ccw_vmparm_attr.attr,
879 NULL,
880 };
881
882 static struct attribute *reipl_ccw_attrs_lpar[] = {
883 &sys_reipl_ccw_device_attr.attr,
884 &sys_reipl_ccw_loadparm_attr.attr,
885 NULL,
886 };
887
888 static struct attribute_group reipl_ccw_attr_group_vm = {
889 .name = IPL_CCW_STR,
890 .attrs = reipl_ccw_attrs_vm,
891 };
892
893 static struct attribute_group reipl_ccw_attr_group_lpar = {
894 .name = IPL_CCW_STR,
895 .attrs = reipl_ccw_attrs_lpar,
896 };
897
898
899 /* NSS reipl device attributes */
900 static void reipl_get_ascii_nss_name(char *dst,
901 struct ipl_parameter_block *ipb)
902 {
903 memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
904 EBCASC(dst, NSS_NAME_SIZE);
905 dst[NSS_NAME_SIZE] = 0;
906 }
907
908 static ssize_t reipl_nss_name_show(struct kobject *kobj,
909 struct kobj_attribute *attr, char *page)
910 {
911 char nss_name[NSS_NAME_SIZE + 1] = {};
912
913 reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
914 return sprintf(page, "%s\n", nss_name);
915 }
916
917 static ssize_t reipl_nss_name_store(struct kobject *kobj,
918 struct kobj_attribute *attr,
919 const char *buf, size_t len)
920 {
921 int nss_len;
922
923 /* ignore trailing newline */
924 nss_len = len;
925 if ((len > 0) && (buf[len - 1] == '\n'))
926 nss_len--;
927
928 if (nss_len > NSS_NAME_SIZE)
929 return -EINVAL;
930
931 memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
932 if (nss_len > 0) {
933 reipl_block_nss->ipl_info.ccw.vm_flags |=
934 DIAG308_VM_FLAGS_NSS_VALID;
935 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
936 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
937 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
938 } else {
939 reipl_block_nss->ipl_info.ccw.vm_flags &=
940 ~DIAG308_VM_FLAGS_NSS_VALID;
941 }
942
943 return len;
944 }
945
946 static struct kobj_attribute sys_reipl_nss_name_attr =
947 __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
948 reipl_nss_name_store);
949
950 static struct kobj_attribute sys_reipl_nss_loadparm_attr =
951 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
952 reipl_nss_loadparm_store);
953
954 static struct attribute *reipl_nss_attrs[] = {
955 &sys_reipl_nss_name_attr.attr,
956 &sys_reipl_nss_loadparm_attr.attr,
957 &sys_reipl_nss_vmparm_attr.attr,
958 NULL,
959 };
960
961 static struct attribute_group reipl_nss_attr_group = {
962 .name = IPL_NSS_STR,
963 .attrs = reipl_nss_attrs,
964 };
965
966 static void set_reipl_block_actual(struct ipl_parameter_block *reipl_block)
967 {
968 reipl_block_actual = reipl_block;
969 os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual,
970 reipl_block->hdr.len);
971 }
972
973 /* reipl type */
974
975 static int reipl_set_type(enum ipl_type type)
976 {
977 if (!(reipl_capabilities & type))
978 return -EINVAL;
979
980 switch(type) {
981 case IPL_TYPE_CCW:
982 if (diag308_set_works)
983 reipl_method = REIPL_METHOD_CCW_DIAG;
984 else if (MACHINE_IS_VM)
985 reipl_method = REIPL_METHOD_CCW_VM;
986 else
987 reipl_method = REIPL_METHOD_CCW_CIO;
988 set_reipl_block_actual(reipl_block_ccw);
989 break;
990 case IPL_TYPE_FCP:
991 if (diag308_set_works)
992 reipl_method = REIPL_METHOD_FCP_RW_DIAG;
993 else if (MACHINE_IS_VM)
994 reipl_method = REIPL_METHOD_FCP_RO_VM;
995 else
996 reipl_method = REIPL_METHOD_FCP_RO_DIAG;
997 set_reipl_block_actual(reipl_block_fcp);
998 break;
999 case IPL_TYPE_FCP_DUMP:
1000 reipl_method = REIPL_METHOD_FCP_DUMP;
1001 break;
1002 case IPL_TYPE_NSS:
1003 if (diag308_set_works)
1004 reipl_method = REIPL_METHOD_NSS_DIAG;
1005 else
1006 reipl_method = REIPL_METHOD_NSS;
1007 set_reipl_block_actual(reipl_block_nss);
1008 break;
1009 case IPL_TYPE_UNKNOWN:
1010 reipl_method = REIPL_METHOD_DEFAULT;
1011 break;
1012 default:
1013 BUG();
1014 }
1015 reipl_type = type;
1016 return 0;
1017 }
1018
1019 static ssize_t reipl_type_show(struct kobject *kobj,
1020 struct kobj_attribute *attr, char *page)
1021 {
1022 return sprintf(page, "%s\n", ipl_type_str(reipl_type));
1023 }
1024
1025 static ssize_t reipl_type_store(struct kobject *kobj,
1026 struct kobj_attribute *attr,
1027 const char *buf, size_t len)
1028 {
1029 int rc = -EINVAL;
1030
1031 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1032 rc = reipl_set_type(IPL_TYPE_CCW);
1033 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1034 rc = reipl_set_type(IPL_TYPE_FCP);
1035 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1036 rc = reipl_set_type(IPL_TYPE_NSS);
1037 return (rc != 0) ? rc : len;
1038 }
1039
1040 static struct kobj_attribute reipl_type_attr =
1041 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
1042
1043 static struct kset *reipl_kset;
1044 static struct kset *reipl_fcp_kset;
1045
1046 static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
1047 const enum ipl_method m)
1048 {
1049 char loadparm[LOADPARM_LEN + 1] = {};
1050 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
1051 char nss_name[NSS_NAME_SIZE + 1] = {};
1052 size_t pos = 0;
1053
1054 reipl_get_ascii_loadparm(loadparm, ipb);
1055 reipl_get_ascii_nss_name(nss_name, ipb);
1056 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
1057
1058 switch (m) {
1059 case REIPL_METHOD_CCW_VM:
1060 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
1061 break;
1062 case REIPL_METHOD_NSS:
1063 pos = sprintf(dst, "IPL %s", nss_name);
1064 break;
1065 default:
1066 break;
1067 }
1068 if (strlen(loadparm) > 0)
1069 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
1070 if (strlen(vmparm) > 0)
1071 sprintf(dst + pos, " PARM %s", vmparm);
1072 }
1073
1074 static void __reipl_run(void *unused)
1075 {
1076 struct ccw_dev_id devid;
1077 static char buf[128];
1078
1079 switch (reipl_method) {
1080 case REIPL_METHOD_CCW_CIO:
1081 devid.ssid = reipl_block_ccw->ipl_info.ccw.ssid;
1082 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
1083 reipl_ccw_dev(&devid);
1084 break;
1085 case REIPL_METHOD_CCW_VM:
1086 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
1087 __cpcmd(buf, NULL, 0, NULL);
1088 break;
1089 case REIPL_METHOD_CCW_DIAG:
1090 diag308(DIAG308_SET, reipl_block_ccw);
1091 if (MACHINE_IS_LPAR)
1092 diag308(DIAG308_LOAD_NORMAL_DUMP, NULL);
1093 else
1094 diag308(DIAG308_LOAD_CLEAR, NULL);
1095 break;
1096 case REIPL_METHOD_FCP_RW_DIAG:
1097 diag308(DIAG308_SET, reipl_block_fcp);
1098 diag308(DIAG308_LOAD_CLEAR, NULL);
1099 break;
1100 case REIPL_METHOD_FCP_RO_DIAG:
1101 diag308(DIAG308_LOAD_CLEAR, NULL);
1102 break;
1103 case REIPL_METHOD_FCP_RO_VM:
1104 __cpcmd("IPL", NULL, 0, NULL);
1105 break;
1106 case REIPL_METHOD_NSS_DIAG:
1107 diag308(DIAG308_SET, reipl_block_nss);
1108 diag308(DIAG308_LOAD_CLEAR, NULL);
1109 break;
1110 case REIPL_METHOD_NSS:
1111 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
1112 __cpcmd(buf, NULL, 0, NULL);
1113 break;
1114 case REIPL_METHOD_DEFAULT:
1115 if (MACHINE_IS_VM)
1116 __cpcmd("IPL", NULL, 0, NULL);
1117 diag308(DIAG308_LOAD_CLEAR, NULL);
1118 break;
1119 case REIPL_METHOD_FCP_DUMP:
1120 break;
1121 }
1122 disabled_wait((unsigned long) __builtin_return_address(0));
1123 }
1124
1125 static void reipl_run(struct shutdown_trigger *trigger)
1126 {
1127 smp_call_ipl_cpu(__reipl_run, NULL);
1128 }
1129
1130 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
1131 {
1132 ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
1133 ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1134 ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1135 ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1136 }
1137
1138 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1139 {
1140 /* LOADPARM */
1141 /* check if read scp info worked and set loadparm */
1142 if (sclp_ipl_info.is_valid)
1143 memcpy(ipb->hdr.loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
1144 else
1145 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1146 memset(ipb->hdr.loadparm, 0x40, LOADPARM_LEN);
1147 ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
1148
1149 /* VM PARM */
1150 if (MACHINE_IS_VM && diag308_set_works &&
1151 (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1152
1153 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1154 ipb->ipl_info.ccw.vm_parm_len =
1155 ipl_block.ipl_info.ccw.vm_parm_len;
1156 memcpy(ipb->ipl_info.ccw.vm_parm,
1157 ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1158 }
1159 }
1160
1161 static int __init reipl_nss_init(void)
1162 {
1163 int rc;
1164
1165 if (!MACHINE_IS_VM)
1166 return 0;
1167
1168 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1169 if (!reipl_block_nss)
1170 return -ENOMEM;
1171
1172 if (!diag308_set_works)
1173 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO;
1174
1175 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1176 if (rc)
1177 return rc;
1178
1179 reipl_block_ccw_init(reipl_block_nss);
1180 if (ipl_info.type == IPL_TYPE_NSS) {
1181 memset(reipl_block_nss->ipl_info.ccw.nss_name,
1182 ' ', NSS_NAME_SIZE);
1183 memcpy(reipl_block_nss->ipl_info.ccw.nss_name,
1184 kernel_nss_name, strlen(kernel_nss_name));
1185 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
1186 reipl_block_nss->ipl_info.ccw.vm_flags |=
1187 DIAG308_VM_FLAGS_NSS_VALID;
1188
1189 reipl_block_ccw_fill_parms(reipl_block_nss);
1190 }
1191
1192 reipl_capabilities |= IPL_TYPE_NSS;
1193 return 0;
1194 }
1195
1196 static int __init reipl_ccw_init(void)
1197 {
1198 int rc;
1199
1200 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1201 if (!reipl_block_ccw)
1202 return -ENOMEM;
1203
1204 if (MACHINE_IS_VM) {
1205 if (!diag308_set_works)
1206 sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
1207 rc = sysfs_create_group(&reipl_kset->kobj,
1208 &reipl_ccw_attr_group_vm);
1209 } else {
1210 if(!diag308_set_works)
1211 sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
1212 rc = sysfs_create_group(&reipl_kset->kobj,
1213 &reipl_ccw_attr_group_lpar);
1214 }
1215 if (rc)
1216 return rc;
1217
1218 reipl_block_ccw_init(reipl_block_ccw);
1219 if (ipl_info.type == IPL_TYPE_CCW) {
1220 reipl_block_ccw->ipl_info.ccw.ssid = ipl_ssid;
1221 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
1222 reipl_block_ccw_fill_parms(reipl_block_ccw);
1223 }
1224
1225 reipl_capabilities |= IPL_TYPE_CCW;
1226 return 0;
1227 }
1228
1229 static int __init reipl_fcp_init(void)
1230 {
1231 int rc;
1232
1233 if (!diag308_set_works) {
1234 if (ipl_info.type == IPL_TYPE_FCP) {
1235 make_attrs_ro(reipl_fcp_attrs);
1236 sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO;
1237 } else
1238 return 0;
1239 }
1240
1241 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1242 if (!reipl_block_fcp)
1243 return -ENOMEM;
1244
1245 /* sysfs: create fcp kset for mixing attr group and bin attrs */
1246 reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1247 &reipl_kset->kobj);
1248 if (!reipl_fcp_kset) {
1249 free_page((unsigned long) reipl_block_fcp);
1250 return -ENOMEM;
1251 }
1252
1253 rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1254 if (rc) {
1255 kset_unregister(reipl_fcp_kset);
1256 free_page((unsigned long) reipl_block_fcp);
1257 return rc;
1258 }
1259
1260 if (ipl_info.type == IPL_TYPE_FCP) {
1261 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
1262 /*
1263 * Fix loadparm: There are systems where the (SCSI) LOADPARM
1264 * is invalid in the SCSI IPL parameter block, so take it
1265 * always from sclp_ipl_info.
1266 */
1267 memcpy(reipl_block_fcp->hdr.loadparm, sclp_ipl_info.loadparm,
1268 LOADPARM_LEN);
1269 } else {
1270 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1271 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1272 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1273 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1274 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1275 }
1276 reipl_capabilities |= IPL_TYPE_FCP;
1277 return 0;
1278 }
1279
1280 static int __init reipl_type_init(void)
1281 {
1282 enum ipl_type reipl_type = ipl_info.type;
1283 struct ipl_parameter_block *reipl_block;
1284 unsigned long size;
1285
1286 reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size);
1287 if (!reipl_block)
1288 goto out;
1289 /*
1290 * If we have an OS info reipl block, this will be used
1291 */
1292 if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_FCP) {
1293 memcpy(reipl_block_fcp, reipl_block, size);
1294 reipl_type = IPL_TYPE_FCP;
1295 } else if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_CCW) {
1296 memcpy(reipl_block_ccw, reipl_block, size);
1297 reipl_type = IPL_TYPE_CCW;
1298 }
1299 out:
1300 return reipl_set_type(reipl_type);
1301 }
1302
1303 static int __init reipl_init(void)
1304 {
1305 int rc;
1306
1307 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1308 if (!reipl_kset)
1309 return -ENOMEM;
1310 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1311 if (rc) {
1312 kset_unregister(reipl_kset);
1313 return rc;
1314 }
1315 rc = reipl_ccw_init();
1316 if (rc)
1317 return rc;
1318 rc = reipl_fcp_init();
1319 if (rc)
1320 return rc;
1321 rc = reipl_nss_init();
1322 if (rc)
1323 return rc;
1324 return reipl_type_init();
1325 }
1326
1327 static struct shutdown_action __refdata reipl_action = {
1328 .name = SHUTDOWN_ACTION_REIPL_STR,
1329 .fn = reipl_run,
1330 .init = reipl_init,
1331 };
1332
1333 /*
1334 * dump shutdown action: Dump Linux on shutdown.
1335 */
1336
1337 /* FCP dump device attributes */
1338
1339 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n",
1340 dump_block_fcp->ipl_info.fcp.wwpn);
1341 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n",
1342 dump_block_fcp->ipl_info.fcp.lun);
1343 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1344 dump_block_fcp->ipl_info.fcp.bootprog);
1345 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1346 dump_block_fcp->ipl_info.fcp.br_lba);
1347 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1348 dump_block_fcp->ipl_info.fcp.devno);
1349
1350 static struct attribute *dump_fcp_attrs[] = {
1351 &sys_dump_fcp_device_attr.attr,
1352 &sys_dump_fcp_wwpn_attr.attr,
1353 &sys_dump_fcp_lun_attr.attr,
1354 &sys_dump_fcp_bootprog_attr.attr,
1355 &sys_dump_fcp_br_lba_attr.attr,
1356 NULL,
1357 };
1358
1359 static struct attribute_group dump_fcp_attr_group = {
1360 .name = IPL_FCP_STR,
1361 .attrs = dump_fcp_attrs,
1362 };
1363
1364 /* CCW dump device attributes */
1365 DEFINE_IPL_CCW_ATTR_RW(dump_ccw, device, dump_block_ccw->ipl_info.ccw);
1366
1367 static struct attribute *dump_ccw_attrs[] = {
1368 &sys_dump_ccw_device_attr.attr,
1369 NULL,
1370 };
1371
1372 static struct attribute_group dump_ccw_attr_group = {
1373 .name = IPL_CCW_STR,
1374 .attrs = dump_ccw_attrs,
1375 };
1376
1377 /* dump type */
1378
1379 static int dump_set_type(enum dump_type type)
1380 {
1381 if (!(dump_capabilities & type))
1382 return -EINVAL;
1383 switch (type) {
1384 case DUMP_TYPE_CCW:
1385 if (diag308_set_works)
1386 dump_method = DUMP_METHOD_CCW_DIAG;
1387 else if (MACHINE_IS_VM)
1388 dump_method = DUMP_METHOD_CCW_VM;
1389 else
1390 dump_method = DUMP_METHOD_CCW_CIO;
1391 break;
1392 case DUMP_TYPE_FCP:
1393 dump_method = DUMP_METHOD_FCP_DIAG;
1394 break;
1395 default:
1396 dump_method = DUMP_METHOD_NONE;
1397 }
1398 dump_type = type;
1399 return 0;
1400 }
1401
1402 static ssize_t dump_type_show(struct kobject *kobj,
1403 struct kobj_attribute *attr, char *page)
1404 {
1405 return sprintf(page, "%s\n", dump_type_str(dump_type));
1406 }
1407
1408 static ssize_t dump_type_store(struct kobject *kobj,
1409 struct kobj_attribute *attr,
1410 const char *buf, size_t len)
1411 {
1412 int rc = -EINVAL;
1413
1414 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1415 rc = dump_set_type(DUMP_TYPE_NONE);
1416 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1417 rc = dump_set_type(DUMP_TYPE_CCW);
1418 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1419 rc = dump_set_type(DUMP_TYPE_FCP);
1420 return (rc != 0) ? rc : len;
1421 }
1422
1423 static struct kobj_attribute dump_type_attr =
1424 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1425
1426 static struct kset *dump_kset;
1427
1428 static void diag308_dump(void *dump_block)
1429 {
1430 diag308(DIAG308_SET, dump_block);
1431 while (1) {
1432 if (diag308(DIAG308_LOAD_NORMAL_DUMP, NULL) != 0x302)
1433 break;
1434 udelay_simple(USEC_PER_SEC);
1435 }
1436 }
1437
1438 static void __dump_run(void *unused)
1439 {
1440 struct ccw_dev_id devid;
1441 static char buf[100];
1442
1443 switch (dump_method) {
1444 case DUMP_METHOD_CCW_CIO:
1445 devid.ssid = dump_block_ccw->ipl_info.ccw.ssid;
1446 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
1447 reipl_ccw_dev(&devid);
1448 break;
1449 case DUMP_METHOD_CCW_VM:
1450 sprintf(buf, "STORE STATUS");
1451 __cpcmd(buf, NULL, 0, NULL);
1452 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
1453 __cpcmd(buf, NULL, 0, NULL);
1454 break;
1455 case DUMP_METHOD_CCW_DIAG:
1456 diag308_dump(dump_block_ccw);
1457 break;
1458 case DUMP_METHOD_FCP_DIAG:
1459 diag308_dump(dump_block_fcp);
1460 break;
1461 default:
1462 break;
1463 }
1464 }
1465
1466 static void dump_run(struct shutdown_trigger *trigger)
1467 {
1468 if (dump_method == DUMP_METHOD_NONE)
1469 return;
1470 smp_send_stop();
1471 smp_call_ipl_cpu(__dump_run, NULL);
1472 }
1473
1474 static int __init dump_ccw_init(void)
1475 {
1476 int rc;
1477
1478 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1479 if (!dump_block_ccw)
1480 return -ENOMEM;
1481 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1482 if (rc) {
1483 free_page((unsigned long)dump_block_ccw);
1484 return rc;
1485 }
1486 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1487 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1488 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1489 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1490 dump_capabilities |= DUMP_TYPE_CCW;
1491 return 0;
1492 }
1493
1494 static int __init dump_fcp_init(void)
1495 {
1496 int rc;
1497
1498 if (!sclp_ipl_info.has_dump)
1499 return 0; /* LDIPL DUMP is not installed */
1500 if (!diag308_set_works)
1501 return 0;
1502 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1503 if (!dump_block_fcp)
1504 return -ENOMEM;
1505 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1506 if (rc) {
1507 free_page((unsigned long)dump_block_fcp);
1508 return rc;
1509 }
1510 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1511 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1512 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1513 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1514 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1515 dump_capabilities |= DUMP_TYPE_FCP;
1516 return 0;
1517 }
1518
1519 static int __init dump_init(void)
1520 {
1521 int rc;
1522
1523 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1524 if (!dump_kset)
1525 return -ENOMEM;
1526 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1527 if (rc) {
1528 kset_unregister(dump_kset);
1529 return rc;
1530 }
1531 rc = dump_ccw_init();
1532 if (rc)
1533 return rc;
1534 rc = dump_fcp_init();
1535 if (rc)
1536 return rc;
1537 dump_set_type(DUMP_TYPE_NONE);
1538 return 0;
1539 }
1540
1541 static struct shutdown_action __refdata dump_action = {
1542 .name = SHUTDOWN_ACTION_DUMP_STR,
1543 .fn = dump_run,
1544 .init = dump_init,
1545 };
1546
1547 static void dump_reipl_run(struct shutdown_trigger *trigger)
1548 {
1549 unsigned long ipib = (unsigned long) reipl_block_actual;
1550 unsigned int csum;
1551
1552 csum = (__force unsigned int)
1553 csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
1554 mem_assign_absolute(S390_lowcore.ipib, ipib);
1555 mem_assign_absolute(S390_lowcore.ipib_checksum, csum);
1556 dump_run(trigger);
1557 }
1558
1559 static int __init dump_reipl_init(void)
1560 {
1561 if (!diag308_set_works)
1562 return -EOPNOTSUPP;
1563 else
1564 return 0;
1565 }
1566
1567 static struct shutdown_action __refdata dump_reipl_action = {
1568 .name = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1569 .fn = dump_reipl_run,
1570 .init = dump_reipl_init,
1571 };
1572
1573 /*
1574 * vmcmd shutdown action: Trigger vm command on shutdown.
1575 */
1576
1577 static char vmcmd_on_reboot[128];
1578 static char vmcmd_on_panic[128];
1579 static char vmcmd_on_halt[128];
1580 static char vmcmd_on_poff[128];
1581 static char vmcmd_on_restart[128];
1582
1583 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1584 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1585 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1586 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1587 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1588
1589 static struct attribute *vmcmd_attrs[] = {
1590 &sys_vmcmd_on_reboot_attr.attr,
1591 &sys_vmcmd_on_panic_attr.attr,
1592 &sys_vmcmd_on_halt_attr.attr,
1593 &sys_vmcmd_on_poff_attr.attr,
1594 &sys_vmcmd_on_restart_attr.attr,
1595 NULL,
1596 };
1597
1598 static struct attribute_group vmcmd_attr_group = {
1599 .attrs = vmcmd_attrs,
1600 };
1601
1602 static struct kset *vmcmd_kset;
1603
1604 static void vmcmd_run(struct shutdown_trigger *trigger)
1605 {
1606 char *cmd;
1607
1608 if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1609 cmd = vmcmd_on_reboot;
1610 else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1611 cmd = vmcmd_on_panic;
1612 else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1613 cmd = vmcmd_on_halt;
1614 else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1615 cmd = vmcmd_on_poff;
1616 else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
1617 cmd = vmcmd_on_restart;
1618 else
1619 return;
1620
1621 if (strlen(cmd) == 0)
1622 return;
1623 __cpcmd(cmd, NULL, 0, NULL);
1624 }
1625
1626 static int vmcmd_init(void)
1627 {
1628 if (!MACHINE_IS_VM)
1629 return -EOPNOTSUPP;
1630 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1631 if (!vmcmd_kset)
1632 return -ENOMEM;
1633 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1634 }
1635
1636 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1637 vmcmd_run, vmcmd_init};
1638
1639 /*
1640 * stop shutdown action: Stop Linux on shutdown.
1641 */
1642
1643 static void stop_run(struct shutdown_trigger *trigger)
1644 {
1645 if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
1646 strcmp(trigger->name, ON_RESTART_STR) == 0)
1647 disabled_wait((unsigned long) __builtin_return_address(0));
1648 smp_stop_cpu();
1649 }
1650
1651 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1652 stop_run, NULL};
1653
1654 /* action list */
1655
1656 static struct shutdown_action *shutdown_actions_list[] = {
1657 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1658 &vmcmd_action, &stop_action};
1659 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1660
1661 /*
1662 * Trigger section
1663 */
1664
1665 static struct kset *shutdown_actions_kset;
1666
1667 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1668 size_t len)
1669 {
1670 int i;
1671
1672 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1673 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1674 if (shutdown_actions_list[i]->init_rc) {
1675 return shutdown_actions_list[i]->init_rc;
1676 } else {
1677 trigger->action = shutdown_actions_list[i];
1678 return len;
1679 }
1680 }
1681 }
1682 return -EINVAL;
1683 }
1684
1685 /* on reipl */
1686
1687 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1688 &reipl_action};
1689
1690 static ssize_t on_reboot_show(struct kobject *kobj,
1691 struct kobj_attribute *attr, char *page)
1692 {
1693 return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1694 }
1695
1696 static ssize_t on_reboot_store(struct kobject *kobj,
1697 struct kobj_attribute *attr,
1698 const char *buf, size_t len)
1699 {
1700 return set_trigger(buf, &on_reboot_trigger, len);
1701 }
1702 static struct kobj_attribute on_reboot_attr = __ATTR_RW(on_reboot);
1703
1704 static void do_machine_restart(char *__unused)
1705 {
1706 smp_send_stop();
1707 on_reboot_trigger.action->fn(&on_reboot_trigger);
1708 reipl_run(NULL);
1709 }
1710 void (*_machine_restart)(char *command) = do_machine_restart;
1711
1712 /* on panic */
1713
1714 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1715
1716 static ssize_t on_panic_show(struct kobject *kobj,
1717 struct kobj_attribute *attr, char *page)
1718 {
1719 return sprintf(page, "%s\n", on_panic_trigger.action->name);
1720 }
1721
1722 static ssize_t on_panic_store(struct kobject *kobj,
1723 struct kobj_attribute *attr,
1724 const char *buf, size_t len)
1725 {
1726 return set_trigger(buf, &on_panic_trigger, len);
1727 }
1728 static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic);
1729
1730 static void do_panic(void)
1731 {
1732 lgr_info_log();
1733 on_panic_trigger.action->fn(&on_panic_trigger);
1734 stop_run(&on_panic_trigger);
1735 }
1736
1737 /* on restart */
1738
1739 static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
1740 &stop_action};
1741
1742 static ssize_t on_restart_show(struct kobject *kobj,
1743 struct kobj_attribute *attr, char *page)
1744 {
1745 return sprintf(page, "%s\n", on_restart_trigger.action->name);
1746 }
1747
1748 static ssize_t on_restart_store(struct kobject *kobj,
1749 struct kobj_attribute *attr,
1750 const char *buf, size_t len)
1751 {
1752 return set_trigger(buf, &on_restart_trigger, len);
1753 }
1754 static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart);
1755
1756 static void __do_restart(void *ignore)
1757 {
1758 __arch_local_irq_stosm(0x04); /* enable DAT */
1759 smp_send_stop();
1760 #ifdef CONFIG_CRASH_DUMP
1761 crash_kexec(NULL);
1762 #endif
1763 on_restart_trigger.action->fn(&on_restart_trigger);
1764 stop_run(&on_restart_trigger);
1765 }
1766
1767 void do_restart(void)
1768 {
1769 tracing_off();
1770 debug_locks_off();
1771 lgr_info_log();
1772 smp_call_online_cpu(__do_restart, NULL);
1773 }
1774
1775 /* on halt */
1776
1777 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1778
1779 static ssize_t on_halt_show(struct kobject *kobj,
1780 struct kobj_attribute *attr, char *page)
1781 {
1782 return sprintf(page, "%s\n", on_halt_trigger.action->name);
1783 }
1784
1785 static ssize_t on_halt_store(struct kobject *kobj,
1786 struct kobj_attribute *attr,
1787 const char *buf, size_t len)
1788 {
1789 return set_trigger(buf, &on_halt_trigger, len);
1790 }
1791 static struct kobj_attribute on_halt_attr = __ATTR_RW(on_halt);
1792
1793 static void do_machine_halt(void)
1794 {
1795 smp_send_stop();
1796 on_halt_trigger.action->fn(&on_halt_trigger);
1797 stop_run(&on_halt_trigger);
1798 }
1799 void (*_machine_halt)(void) = do_machine_halt;
1800
1801 /* on power off */
1802
1803 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1804
1805 static ssize_t on_poff_show(struct kobject *kobj,
1806 struct kobj_attribute *attr, char *page)
1807 {
1808 return sprintf(page, "%s\n", on_poff_trigger.action->name);
1809 }
1810
1811 static ssize_t on_poff_store(struct kobject *kobj,
1812 struct kobj_attribute *attr,
1813 const char *buf, size_t len)
1814 {
1815 return set_trigger(buf, &on_poff_trigger, len);
1816 }
1817 static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff);
1818
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
1827 static struct attribute *shutdown_action_attrs[] = {
1828 &on_restart_attr.attr,
1829 &on_reboot_attr.attr,
1830 &on_panic_attr.attr,
1831 &on_halt_attr.attr,
1832 &on_poff_attr.attr,
1833 NULL,
1834 };
1835
1836 static struct attribute_group shutdown_action_attr_group = {
1837 .attrs = shutdown_action_attrs,
1838 };
1839
1840 static void __init shutdown_triggers_init(void)
1841 {
1842 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1843 firmware_kobj);
1844 if (!shutdown_actions_kset)
1845 goto fail;
1846 if (sysfs_create_group(&shutdown_actions_kset->kobj,
1847 &shutdown_action_attr_group))
1848 goto fail;
1849 return;
1850 fail:
1851 panic("shutdown_triggers_init failed\n");
1852 }
1853
1854 static void __init shutdown_actions_init(void)
1855 {
1856 int i;
1857
1858 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1859 if (!shutdown_actions_list[i]->init)
1860 continue;
1861 shutdown_actions_list[i]->init_rc =
1862 shutdown_actions_list[i]->init();
1863 }
1864 }
1865
1866 static int __init s390_ipl_init(void)
1867 {
1868 char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40};
1869
1870 sclp_early_get_ipl_info(&sclp_ipl_info);
1871 /*
1872 * Fix loadparm: There are systems where the (SCSI) LOADPARM
1873 * returned by read SCP info is invalid (contains EBCDIC blanks)
1874 * when the system has been booted via diag308. In that case we use
1875 * the value from diag308, if available.
1876 *
1877 * There are also systems where diag308 store does not work in
1878 * case the system is booted from HMC. Fortunately in this case
1879 * READ SCP info provides the correct value.
1880 */
1881 if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 &&
1882 diag308_set_works)
1883 memcpy(sclp_ipl_info.loadparm, ipl_block.hdr.loadparm,
1884 LOADPARM_LEN);
1885 shutdown_actions_init();
1886 shutdown_triggers_init();
1887 return 0;
1888 }
1889
1890 __initcall(s390_ipl_init);
1891
1892 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1893 {
1894 int sx, dx;
1895
1896 dx = 0;
1897 for (sx = 0; src[sx] != 0; sx++) {
1898 if (src[sx] == '"')
1899 continue;
1900 dst[dx++] = src[sx];
1901 if (dx >= n)
1902 break;
1903 }
1904 }
1905
1906 static int __init vmcmd_on_reboot_setup(char *str)
1907 {
1908 if (!MACHINE_IS_VM)
1909 return 1;
1910 strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1911 vmcmd_on_reboot[127] = 0;
1912 on_reboot_trigger.action = &vmcmd_action;
1913 return 1;
1914 }
1915 __setup("vmreboot=", vmcmd_on_reboot_setup);
1916
1917 static int __init vmcmd_on_panic_setup(char *str)
1918 {
1919 if (!MACHINE_IS_VM)
1920 return 1;
1921 strncpy_skip_quote(vmcmd_on_panic, str, 127);
1922 vmcmd_on_panic[127] = 0;
1923 on_panic_trigger.action = &vmcmd_action;
1924 return 1;
1925 }
1926 __setup("vmpanic=", vmcmd_on_panic_setup);
1927
1928 static int __init vmcmd_on_halt_setup(char *str)
1929 {
1930 if (!MACHINE_IS_VM)
1931 return 1;
1932 strncpy_skip_quote(vmcmd_on_halt, str, 127);
1933 vmcmd_on_halt[127] = 0;
1934 on_halt_trigger.action = &vmcmd_action;
1935 return 1;
1936 }
1937 __setup("vmhalt=", vmcmd_on_halt_setup);
1938
1939 static int __init vmcmd_on_poff_setup(char *str)
1940 {
1941 if (!MACHINE_IS_VM)
1942 return 1;
1943 strncpy_skip_quote(vmcmd_on_poff, str, 127);
1944 vmcmd_on_poff[127] = 0;
1945 on_poff_trigger.action = &vmcmd_action;
1946 return 1;
1947 }
1948 __setup("vmpoff=", vmcmd_on_poff_setup);
1949
1950 static int on_panic_notify(struct notifier_block *self,
1951 unsigned long event, void *data)
1952 {
1953 do_panic();
1954 return NOTIFY_OK;
1955 }
1956
1957 static struct notifier_block on_panic_nb = {
1958 .notifier_call = on_panic_notify,
1959 .priority = INT_MIN,
1960 };
1961
1962 void __init setup_ipl(void)
1963 {
1964 ipl_info.type = get_ipl_type();
1965 switch (ipl_info.type) {
1966 case IPL_TYPE_CCW:
1967 ipl_info.data.ccw.dev_id.ssid = ipl_ssid;
1968 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1969 break;
1970 case IPL_TYPE_FCP:
1971 case IPL_TYPE_FCP_DUMP:
1972 ipl_info.data.fcp.dev_id.ssid = 0;
1973 ipl_info.data.fcp.dev_id.devno =
1974 IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1975 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1976 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1977 break;
1978 case IPL_TYPE_NSS:
1979 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1980 sizeof(ipl_info.data.nss.name));
1981 break;
1982 case IPL_TYPE_UNKNOWN:
1983 /* We have no info to copy */
1984 break;
1985 }
1986 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1987 }
1988
1989 void __init ipl_update_parameters(void)
1990 {
1991 int rc;
1992
1993 rc = diag308(DIAG308_STORE, &ipl_block);
1994 if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
1995 diag308_set_works = 1;
1996 }
1997
1998 void __init ipl_verify_parameters(void)
1999 {
2000 struct cio_iplinfo iplinfo;
2001
2002 if (cio_get_iplinfo(&iplinfo))
2003 return;
2004
2005 ipl_ssid = iplinfo.ssid;
2006 ipl_devno = iplinfo.devno;
2007 ipl_flags |= IPL_DEVNO_VALID;
2008 if (!iplinfo.is_qdio)
2009 return;
2010 ipl_flags |= IPL_PARMBLOCK_VALID;
2011 }
2012
2013 static LIST_HEAD(rcall);
2014 static DEFINE_MUTEX(rcall_mutex);
2015
2016 void register_reset_call(struct reset_call *reset)
2017 {
2018 mutex_lock(&rcall_mutex);
2019 list_add(&reset->list, &rcall);
2020 mutex_unlock(&rcall_mutex);
2021 }
2022 EXPORT_SYMBOL_GPL(register_reset_call);
2023
2024 void unregister_reset_call(struct reset_call *reset)
2025 {
2026 mutex_lock(&rcall_mutex);
2027 list_del(&reset->list);
2028 mutex_unlock(&rcall_mutex);
2029 }
2030 EXPORT_SYMBOL_GPL(unregister_reset_call);
2031
2032 static void do_reset_calls(void)
2033 {
2034 struct reset_call *reset;
2035
2036 if (diag308_set_works) {
2037 diag308_reset();
2038 return;
2039 }
2040 list_for_each_entry(reset, &rcall, list)
2041 reset->fn();
2042 }
2043
2044 void s390_reset_system(void)
2045 {
2046 struct lowcore *lc;
2047
2048 lc = (struct lowcore *)(unsigned long) store_prefix();
2049
2050 /* Stack for interrupt/machine check handler */
2051 lc->panic_stack = S390_lowcore.panic_stack;
2052
2053 /* Disable prefixing */
2054 set_prefix(0);
2055
2056 /* Disable lowcore protection */
2057 __ctl_clear_bit(0,28);
2058
2059 /* Set new machine check handler */
2060 S390_lowcore.mcck_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
2061 S390_lowcore.mcck_new_psw.addr =
2062 (unsigned long) s390_base_mcck_handler;
2063
2064 /* Set new program check handler */
2065 S390_lowcore.program_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
2066 S390_lowcore.program_new_psw.addr =
2067 (unsigned long) s390_base_pgm_handler;
2068
2069 do_reset_calls();
2070 }
Linux with added FPC-III support