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tcp: fix return value for partial writes
[linux-2.6/btrfs-unstable.git] / arch / s390 / kernel / ipl.c
blob295bfb7124bcac7a55b71fedb0e9f55a96b7e1ad
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/module.h>
12 #include <linux/device.h>
13 #include <linux/delay.h>
14 #include <linux/reboot.h>
15 #include <linux/ctype.h>
16 #include <linux/fs.h>
17 #include <linux/gfp.h>
18 #include <linux/crash_dump.h>
19 #include <linux/debug_locks.h>
20 #include <asm/diag.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
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
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 u8 ipl_ssid __section(.data) = 0;
125 static u16 ipl_devno __section(.data) = 0;
126 u32 ipl_flags __section(.data) = 0;
127
128 enum ipl_method {
129 REIPL_METHOD_CCW_CIO,
130 REIPL_METHOD_CCW_DIAG,
131 REIPL_METHOD_CCW_VM,
132 REIPL_METHOD_FCP_RO_DIAG,
133 REIPL_METHOD_FCP_RW_DIAG,
134 REIPL_METHOD_FCP_RO_VM,
135 REIPL_METHOD_FCP_DUMP,
136 REIPL_METHOD_NSS,
137 REIPL_METHOD_NSS_DIAG,
138 REIPL_METHOD_DEFAULT,
139 };
140
141 enum dump_method {
142 DUMP_METHOD_NONE,
143 DUMP_METHOD_CCW_CIO,
144 DUMP_METHOD_CCW_DIAG,
145 DUMP_METHOD_CCW_VM,
146 DUMP_METHOD_FCP_DIAG,
147 };
148
149 static int diag308_set_works = 0;
150
151 static struct ipl_parameter_block ipl_block;
152
153 static int reipl_capabilities = IPL_TYPE_UNKNOWN;
154
155 static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
156 static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
157 static struct ipl_parameter_block *reipl_block_fcp;
158 static struct ipl_parameter_block *reipl_block_ccw;
159 static struct ipl_parameter_block *reipl_block_nss;
160 static struct ipl_parameter_block *reipl_block_actual;
161
162 static int dump_capabilities = DUMP_TYPE_NONE;
163 static enum dump_type dump_type = DUMP_TYPE_NONE;
164 static enum dump_method dump_method = DUMP_METHOD_NONE;
165 static struct ipl_parameter_block *dump_block_fcp;
166 static struct ipl_parameter_block *dump_block_ccw;
167
168 static struct sclp_ipl_info sclp_ipl_info;
169
170 static inline int __diag308(unsigned long subcode, void *addr)
171 {
172 register unsigned long _addr asm("0") = (unsigned long) addr;
173 register unsigned long _rc asm("1") = 0;
174
175 asm volatile(
176 " diag %0,%2,0x308\n"
177 "0: nopr %%r7\n"
178 EX_TABLE(0b,0b)
179 : "+d" (_addr), "+d" (_rc)
180 : "d" (subcode) : "cc", "memory");
181 return _rc;
182 }
183
184 int diag308(unsigned long subcode, void *addr)
185 {
186 diag_stat_inc(DIAG_STAT_X308);
187 return __diag308(subcode, addr);
188 }
189 EXPORT_SYMBOL_GPL(diag308);
190
191 /* SYSFS */
192
193 #define IPL_ATTR_SHOW_FN(_prefix, _name, _format, args...) \
194 static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
195 struct kobj_attribute *attr, \
196 char *page) \
197 { \
198 return snprintf(page, PAGE_SIZE, _format, ##args); \
199 }
200
201 #define IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk) \
202 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
203 struct kobj_attribute *attr, \
204 const char *buf, size_t len) \
205 { \
206 unsigned long long ssid, devno; \
207 \
208 if (sscanf(buf, "0.%llx.%llx\n", &ssid, &devno) != 2) \
209 return -EINVAL; \
210 \
211 if (ssid > __MAX_SSID || devno > __MAX_SUBCHANNEL) \
212 return -EINVAL; \
213 \
214 _ipl_blk.ssid = ssid; \
215 _ipl_blk.devno = devno; \
216 return len; \
217 }
218
219 #define DEFINE_IPL_CCW_ATTR_RW(_prefix, _name, _ipl_blk) \
220 IPL_ATTR_SHOW_FN(_prefix, _name, "0.%x.%04x\n", \
221 _ipl_blk.ssid, _ipl_blk.devno); \
222 IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk); \
223 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
224 __ATTR(_name, (S_IRUGO | S_IWUSR), \
225 sys_##_prefix##_##_name##_show, \
226 sys_##_prefix##_##_name##_store) \
227
228 #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
229 IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value) \
230 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
231 __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL)
232
233 #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
234 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value) \
235 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
236 struct kobj_attribute *attr, \
237 const char *buf, size_t len) \
238 { \
239 unsigned long long value; \
240 if (sscanf(buf, _fmt_in, &value) != 1) \
241 return -EINVAL; \
242 _value = value; \
243 return len; \
244 } \
245 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
246 __ATTR(_name,(S_IRUGO | S_IWUSR), \
247 sys_##_prefix##_##_name##_show, \
248 sys_##_prefix##_##_name##_store)
249
250 #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
251 IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, _value) \
252 static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
253 struct kobj_attribute *attr, \
254 const char *buf, size_t len) \
255 { \
256 strncpy(_value, buf, sizeof(_value) - 1); \
257 strim(_value); \
258 return len; \
259 } \
260 static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
261 __ATTR(_name,(S_IRUGO | S_IWUSR), \
262 sys_##_prefix##_##_name##_show, \
263 sys_##_prefix##_##_name##_store)
264
265 static void make_attrs_ro(struct attribute **attrs)
266 {
267 while (*attrs) {
268 (*attrs)->mode = S_IRUGO;
269 attrs++;
270 }
271 }
272
273 /*
274 * ipl section
275 */
276
277 static __init enum ipl_type get_ipl_type(void)
278 {
279 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
280
281 if (ipl_flags & IPL_NSS_VALID)
282 return IPL_TYPE_NSS;
283 if (!(ipl_flags & IPL_DEVNO_VALID))
284 return IPL_TYPE_UNKNOWN;
285 if (!(ipl_flags & IPL_PARMBLOCK_VALID))
286 return IPL_TYPE_CCW;
287 if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
288 return IPL_TYPE_UNKNOWN;
289 if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
290 return IPL_TYPE_UNKNOWN;
291 if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
292 return IPL_TYPE_FCP_DUMP;
293 return IPL_TYPE_FCP;
294 }
295
296 struct ipl_info ipl_info;
297 EXPORT_SYMBOL_GPL(ipl_info);
298
299 static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
300 char *page)
301 {
302 return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
303 }
304
305 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
306
307 /* VM IPL PARM routines */
308 static size_t reipl_get_ascii_vmparm(char *dest, size_t size,
309 const struct ipl_parameter_block *ipb)
310 {
311 int i;
312 size_t len;
313 char has_lowercase = 0;
314
315 len = 0;
316 if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
317 (ipb->ipl_info.ccw.vm_parm_len > 0)) {
318
319 len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
320 memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
321 /* If at least one character is lowercase, we assume mixed
322 * case; otherwise we convert everything to lowercase.
323 */
324 for (i = 0; i < len; i++)
325 if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
326 (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
327 (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
328 has_lowercase = 1;
329 break;
330 }
331 if (!has_lowercase)
332 EBC_TOLOWER(dest, len);
333 EBCASC(dest, len);
334 }
335 dest[len] = 0;
336
337 return len;
338 }
339
340 size_t append_ipl_vmparm(char *dest, size_t size)
341 {
342 size_t rc;
343
344 rc = 0;
345 if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
346 rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
347 else
348 dest[0] = 0;
349 return rc;
350 }
351
352 static ssize_t ipl_vm_parm_show(struct kobject *kobj,
353 struct kobj_attribute *attr, char *page)
354 {
355 char parm[DIAG308_VMPARM_SIZE + 1] = {};
356
357 append_ipl_vmparm(parm, sizeof(parm));
358 return sprintf(page, "%s\n", parm);
359 }
360
361 static size_t scpdata_length(const char* buf, size_t count)
362 {
363 while (count) {
364 if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
365 break;
366 count--;
367 }
368 return count;
369 }
370
371 static size_t reipl_append_ascii_scpdata(char *dest, size_t size,
372 const struct ipl_parameter_block *ipb)
373 {
374 size_t count;
375 size_t i;
376 int has_lowercase;
377
378 count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data,
379 ipb->ipl_info.fcp.scp_data_len));
380 if (!count)
381 goto out;
382
383 has_lowercase = 0;
384 for (i = 0; i < count; i++) {
385 if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
386 count = 0;
387 goto out;
388 }
389 if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
390 has_lowercase = 1;
391 }
392
393 if (has_lowercase)
394 memcpy(dest, ipb->ipl_info.fcp.scp_data, count);
395 else
396 for (i = 0; i < count; i++)
397 dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]);
398 out:
399 dest[count] = '\0';
400 return count;
401 }
402
403 size_t append_ipl_scpdata(char *dest, size_t len)
404 {
405 size_t rc;
406
407 rc = 0;
408 if (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP)
409 rc = reipl_append_ascii_scpdata(dest, len, &ipl_block);
410 else
411 dest[0] = 0;
412 return rc;
413 }
414
415
416 static struct kobj_attribute sys_ipl_vm_parm_attr =
417 __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
418
419 static ssize_t sys_ipl_device_show(struct kobject *kobj,
420 struct kobj_attribute *attr, char *page)
421 {
422 struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
423
424 switch (ipl_info.type) {
425 case IPL_TYPE_CCW:
426 return sprintf(page, "0.%x.%04x\n", ipl_ssid, ipl_devno);
427 case IPL_TYPE_FCP:
428 case IPL_TYPE_FCP_DUMP:
429 return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
430 default:
431 return 0;
432 }
433 }
434
435 static struct kobj_attribute sys_ipl_device_attr =
436 __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
437
438 static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
439 struct bin_attribute *attr, char *buf,
440 loff_t off, size_t count)
441 {
442 return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START,
443 IPL_PARMBLOCK_SIZE);
444 }
445 static struct bin_attribute ipl_parameter_attr =
446 __BIN_ATTR(binary_parameter, S_IRUGO, ipl_parameter_read, NULL,
447 PAGE_SIZE);
448
449 static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
450 struct bin_attribute *attr, char *buf,
451 loff_t off, size_t count)
452 {
453 unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
454 void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
455
456 return memory_read_from_buffer(buf, count, &off, scp_data, size);
457 }
458 static struct bin_attribute ipl_scp_data_attr =
459 __BIN_ATTR(scp_data, S_IRUGO, ipl_scp_data_read, NULL, PAGE_SIZE);
460
461 static struct bin_attribute *ipl_fcp_bin_attrs[] = {
462 &ipl_parameter_attr,
463 &ipl_scp_data_attr,
464 NULL,
465 };
466
467 /* FCP ipl device attributes */
468
469 DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
470 IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
471 DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
472 IPL_PARMBLOCK_START->ipl_info.fcp.lun);
473 DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
474 IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
475 DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
476 IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
477
478 static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
479 struct kobj_attribute *attr, char *page)
480 {
481 char loadparm[LOADPARM_LEN + 1] = {};
482
483 if (!sclp_ipl_info.is_valid)
484 return sprintf(page, "#unknown#\n");
485 memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
486 EBCASC(loadparm, LOADPARM_LEN);
487 strim(loadparm);
488 return sprintf(page, "%s\n", loadparm);
489 }
490
491 static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
492 __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
493
494 static struct attribute *ipl_fcp_attrs[] = {
495 &sys_ipl_type_attr.attr,
496 &sys_ipl_device_attr.attr,
497 &sys_ipl_fcp_wwpn_attr.attr,
498 &sys_ipl_fcp_lun_attr.attr,
499 &sys_ipl_fcp_bootprog_attr.attr,
500 &sys_ipl_fcp_br_lba_attr.attr,
501 &sys_ipl_ccw_loadparm_attr.attr,
502 NULL,
503 };
504
505 static struct attribute_group ipl_fcp_attr_group = {
506 .attrs = ipl_fcp_attrs,
507 .bin_attrs = ipl_fcp_bin_attrs,
508 };
509
510 /* CCW ipl device attributes */
511
512 static struct attribute *ipl_ccw_attrs_vm[] = {
513 &sys_ipl_type_attr.attr,
514 &sys_ipl_device_attr.attr,
515 &sys_ipl_ccw_loadparm_attr.attr,
516 &sys_ipl_vm_parm_attr.attr,
517 NULL,
518 };
519
520 static struct attribute *ipl_ccw_attrs_lpar[] = {
521 &sys_ipl_type_attr.attr,
522 &sys_ipl_device_attr.attr,
523 &sys_ipl_ccw_loadparm_attr.attr,
524 NULL,
525 };
526
527 static struct attribute_group ipl_ccw_attr_group_vm = {
528 .attrs = ipl_ccw_attrs_vm,
529 };
530
531 static struct attribute_group ipl_ccw_attr_group_lpar = {
532 .attrs = ipl_ccw_attrs_lpar
533 };
534
535 /* NSS ipl device attributes */
536
537 DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
538
539 static struct attribute *ipl_nss_attrs[] = {
540 &sys_ipl_type_attr.attr,
541 &sys_ipl_nss_name_attr.attr,
542 &sys_ipl_ccw_loadparm_attr.attr,
543 &sys_ipl_vm_parm_attr.attr,
544 NULL,
545 };
546
547 static struct attribute_group ipl_nss_attr_group = {
548 .attrs = ipl_nss_attrs,
549 };
550
551 /* UNKNOWN ipl device attributes */
552
553 static struct attribute *ipl_unknown_attrs[] = {
554 &sys_ipl_type_attr.attr,
555 NULL,
556 };
557
558 static struct attribute_group ipl_unknown_attr_group = {
559 .attrs = ipl_unknown_attrs,
560 };
561
562 static struct kset *ipl_kset;
563
564 static void __ipl_run(void *unused)
565 {
566 diag308(DIAG308_LOAD_CLEAR, NULL);
567 if (MACHINE_IS_VM)
568 __cpcmd("IPL", NULL, 0, NULL);
569 else if (ipl_info.type == IPL_TYPE_CCW)
570 reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
571 }
572
573 static void ipl_run(struct shutdown_trigger *trigger)
574 {
575 smp_call_ipl_cpu(__ipl_run, NULL);
576 }
577
578 static int __init ipl_init(void)
579 {
580 int rc;
581
582 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
583 if (!ipl_kset) {
584 rc = -ENOMEM;
585 goto out;
586 }
587 switch (ipl_info.type) {
588 case IPL_TYPE_CCW:
589 if (MACHINE_IS_VM)
590 rc = sysfs_create_group(&ipl_kset->kobj,
591 &ipl_ccw_attr_group_vm);
592 else
593 rc = sysfs_create_group(&ipl_kset->kobj,
594 &ipl_ccw_attr_group_lpar);
595 break;
596 case IPL_TYPE_FCP:
597 case IPL_TYPE_FCP_DUMP:
598 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
599 break;
600 case IPL_TYPE_NSS:
601 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group);
602 break;
603 default:
604 rc = sysfs_create_group(&ipl_kset->kobj,
605 &ipl_unknown_attr_group);
606 break;
607 }
608 out:
609 if (rc)
610 panic("ipl_init failed: rc = %i\n", rc);
611
612 return 0;
613 }
614
615 static struct shutdown_action __refdata ipl_action = {
616 .name = SHUTDOWN_ACTION_IPL_STR,
617 .fn = ipl_run,
618 .init = ipl_init,
619 };
620
621 /*
622 * reipl shutdown action: Reboot Linux on shutdown.
623 */
624
625 /* VM IPL PARM attributes */
626 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
627 char *page)
628 {
629 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
630
631 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
632 return sprintf(page, "%s\n", vmparm);
633 }
634
635 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
636 size_t vmparm_max,
637 const char *buf, size_t len)
638 {
639 int i, ip_len;
640
641 /* ignore trailing newline */
642 ip_len = len;
643 if ((len > 0) && (buf[len - 1] == '\n'))
644 ip_len--;
645
646 if (ip_len > vmparm_max)
647 return -EINVAL;
648
649 /* parm is used to store kernel options, check for common chars */
650 for (i = 0; i < ip_len; i++)
651 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
652 return -EINVAL;
653
654 memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
655 ipb->ipl_info.ccw.vm_parm_len = ip_len;
656 if (ip_len > 0) {
657 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
658 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
659 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
660 } else {
661 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
662 }
663
664 return len;
665 }
666
667 /* NSS wrapper */
668 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
669 struct kobj_attribute *attr, char *page)
670 {
671 return reipl_generic_vmparm_show(reipl_block_nss, page);
672 }
673
674 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
675 struct kobj_attribute *attr,
676 const char *buf, size_t len)
677 {
678 return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
679 }
680
681 /* CCW wrapper */
682 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
683 struct kobj_attribute *attr, char *page)
684 {
685 return reipl_generic_vmparm_show(reipl_block_ccw, page);
686 }
687
688 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
689 struct kobj_attribute *attr,
690 const char *buf, size_t len)
691 {
692 return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
693 }
694
695 static struct kobj_attribute sys_reipl_nss_vmparm_attr =
696 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
697 reipl_nss_vmparm_store);
698 static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
699 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
700 reipl_ccw_vmparm_store);
701
702 /* FCP reipl device attributes */
703
704 static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
705 struct bin_attribute *attr,
706 char *buf, loff_t off, size_t count)
707 {
708 size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
709 void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
710
711 return memory_read_from_buffer(buf, count, &off, scp_data, size);
712 }
713
714 static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
715 struct bin_attribute *attr,
716 char *buf, loff_t off, size_t count)
717 {
718 size_t scpdata_len = count;
719 size_t padding;
720
721
722 if (off)
723 return -EINVAL;
724
725 memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf, count);
726 if (scpdata_len % 8) {
727 padding = 8 - (scpdata_len % 8);
728 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
729 0, padding);
730 scpdata_len += padding;
731 }
732
733 reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
734 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
735 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
736
737 return count;
738 }
739 static struct bin_attribute sys_reipl_fcp_scp_data_attr =
740 __BIN_ATTR(scp_data, (S_IRUGO | S_IWUSR), reipl_fcp_scpdata_read,
741 reipl_fcp_scpdata_write, DIAG308_SCPDATA_SIZE);
742
743 static struct bin_attribute *reipl_fcp_bin_attrs[] = {
744 &sys_reipl_fcp_scp_data_attr,
745 NULL,
746 };
747
748 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n",
749 reipl_block_fcp->ipl_info.fcp.wwpn);
750 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n",
751 reipl_block_fcp->ipl_info.fcp.lun);
752 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
753 reipl_block_fcp->ipl_info.fcp.bootprog);
754 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
755 reipl_block_fcp->ipl_info.fcp.br_lba);
756 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
757 reipl_block_fcp->ipl_info.fcp.devno);
758
759 static void reipl_get_ascii_loadparm(char *loadparm,
760 struct ipl_parameter_block *ibp)
761 {
762 memcpy(loadparm, ibp->hdr.loadparm, LOADPARM_LEN);
763 EBCASC(loadparm, LOADPARM_LEN);
764 loadparm[LOADPARM_LEN] = 0;
765 strim(loadparm);
766 }
767
768 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
769 char *page)
770 {
771 char buf[LOADPARM_LEN + 1];
772
773 reipl_get_ascii_loadparm(buf, ipb);
774 return sprintf(page, "%s\n", buf);
775 }
776
777 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
778 const char *buf, size_t len)
779 {
780 int i, lp_len;
781
782 /* ignore trailing newline */
783 lp_len = len;
784 if ((len > 0) && (buf[len - 1] == '\n'))
785 lp_len--;
786 /* loadparm can have max 8 characters and must not start with a blank */
787 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
788 return -EINVAL;
789 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
790 for (i = 0; i < lp_len; i++) {
791 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
792 (buf[i] == '.'))
793 continue;
794 return -EINVAL;
795 }
796 /* initialize loadparm with blanks */
797 memset(ipb->hdr.loadparm, ' ', LOADPARM_LEN);
798 /* copy and convert to ebcdic */
799 memcpy(ipb->hdr.loadparm, buf, lp_len);
800 ASCEBC(ipb->hdr.loadparm, LOADPARM_LEN);
801 return len;
802 }
803
804 /* FCP wrapper */
805 static ssize_t reipl_fcp_loadparm_show(struct kobject *kobj,
806 struct kobj_attribute *attr, char *page)
807 {
808 return reipl_generic_loadparm_show(reipl_block_fcp, page);
809 }
810
811 static ssize_t reipl_fcp_loadparm_store(struct kobject *kobj,
812 struct kobj_attribute *attr,
813 const char *buf, size_t len)
814 {
815 return reipl_generic_loadparm_store(reipl_block_fcp, buf, len);
816 }
817
818 static struct kobj_attribute sys_reipl_fcp_loadparm_attr =
819 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_fcp_loadparm_show,
820 reipl_fcp_loadparm_store);
821
822 static struct attribute *reipl_fcp_attrs[] = {
823 &sys_reipl_fcp_device_attr.attr,
824 &sys_reipl_fcp_wwpn_attr.attr,
825 &sys_reipl_fcp_lun_attr.attr,
826 &sys_reipl_fcp_bootprog_attr.attr,
827 &sys_reipl_fcp_br_lba_attr.attr,
828 &sys_reipl_fcp_loadparm_attr.attr,
829 NULL,
830 };
831
832 static struct attribute_group reipl_fcp_attr_group = {
833 .attrs = reipl_fcp_attrs,
834 .bin_attrs = reipl_fcp_bin_attrs,
835 };
836
837 /* CCW reipl device attributes */
838 DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ipl_info.ccw);
839
840 /* NSS wrapper */
841 static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
842 struct kobj_attribute *attr, char *page)
843 {
844 return reipl_generic_loadparm_show(reipl_block_nss, page);
845 }
846
847 static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
848 struct kobj_attribute *attr,
849 const char *buf, size_t len)
850 {
851 return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
852 }
853
854 /* CCW wrapper */
855 static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
856 struct kobj_attribute *attr, char *page)
857 {
858 return reipl_generic_loadparm_show(reipl_block_ccw, page);
859 }
860
861 static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
862 struct kobj_attribute *attr,
863 const char *buf, size_t len)
864 {
865 return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
866 }
867
868 static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
869 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
870 reipl_ccw_loadparm_store);
871
872 static struct attribute *reipl_ccw_attrs_vm[] = {
873 &sys_reipl_ccw_device_attr.attr,
874 &sys_reipl_ccw_loadparm_attr.attr,
875 &sys_reipl_ccw_vmparm_attr.attr,
876 NULL,
877 };
878
879 static struct attribute *reipl_ccw_attrs_lpar[] = {
880 &sys_reipl_ccw_device_attr.attr,
881 &sys_reipl_ccw_loadparm_attr.attr,
882 NULL,
883 };
884
885 static struct attribute_group reipl_ccw_attr_group_vm = {
886 .name = IPL_CCW_STR,
887 .attrs = reipl_ccw_attrs_vm,
888 };
889
890 static struct attribute_group reipl_ccw_attr_group_lpar = {
891 .name = IPL_CCW_STR,
892 .attrs = reipl_ccw_attrs_lpar,
893 };
894
895
896 /* NSS reipl device attributes */
897 static void reipl_get_ascii_nss_name(char *dst,
898 struct ipl_parameter_block *ipb)
899 {
900 memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
901 EBCASC(dst, NSS_NAME_SIZE);
902 dst[NSS_NAME_SIZE] = 0;
903 }
904
905 static ssize_t reipl_nss_name_show(struct kobject *kobj,
906 struct kobj_attribute *attr, char *page)
907 {
908 char nss_name[NSS_NAME_SIZE + 1] = {};
909
910 reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
911 return sprintf(page, "%s\n", nss_name);
912 }
913
914 static ssize_t reipl_nss_name_store(struct kobject *kobj,
915 struct kobj_attribute *attr,
916 const char *buf, size_t len)
917 {
918 int nss_len;
919
920 /* ignore trailing newline */
921 nss_len = len;
922 if ((len > 0) && (buf[len - 1] == '\n'))
923 nss_len--;
924
925 if (nss_len > NSS_NAME_SIZE)
926 return -EINVAL;
927
928 memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
929 if (nss_len > 0) {
930 reipl_block_nss->ipl_info.ccw.vm_flags |=
931 DIAG308_VM_FLAGS_NSS_VALID;
932 memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
933 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
934 EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
935 } else {
936 reipl_block_nss->ipl_info.ccw.vm_flags &=
937 ~DIAG308_VM_FLAGS_NSS_VALID;
938 }
939
940 return len;
941 }
942
943 static struct kobj_attribute sys_reipl_nss_name_attr =
944 __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
945 reipl_nss_name_store);
946
947 static struct kobj_attribute sys_reipl_nss_loadparm_attr =
948 __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
949 reipl_nss_loadparm_store);
950
951 static struct attribute *reipl_nss_attrs[] = {
952 &sys_reipl_nss_name_attr.attr,
953 &sys_reipl_nss_loadparm_attr.attr,
954 &sys_reipl_nss_vmparm_attr.attr,
955 NULL,
956 };
957
958 static struct attribute_group reipl_nss_attr_group = {
959 .name = IPL_NSS_STR,
960 .attrs = reipl_nss_attrs,
961 };
962
963 static void set_reipl_block_actual(struct ipl_parameter_block *reipl_block)
964 {
965 reipl_block_actual = reipl_block;
966 os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual,
967 reipl_block->hdr.len);
968 }
969
970 /* reipl type */
971
972 static int reipl_set_type(enum ipl_type type)
973 {
974 if (!(reipl_capabilities & type))
975 return -EINVAL;
976
977 switch(type) {
978 case IPL_TYPE_CCW:
979 if (diag308_set_works)
980 reipl_method = REIPL_METHOD_CCW_DIAG;
981 else if (MACHINE_IS_VM)
982 reipl_method = REIPL_METHOD_CCW_VM;
983 else
984 reipl_method = REIPL_METHOD_CCW_CIO;
985 set_reipl_block_actual(reipl_block_ccw);
986 break;
987 case IPL_TYPE_FCP:
988 if (diag308_set_works)
989 reipl_method = REIPL_METHOD_FCP_RW_DIAG;
990 else if (MACHINE_IS_VM)
991 reipl_method = REIPL_METHOD_FCP_RO_VM;
992 else
993 reipl_method = REIPL_METHOD_FCP_RO_DIAG;
994 set_reipl_block_actual(reipl_block_fcp);
995 break;
996 case IPL_TYPE_FCP_DUMP:
997 reipl_method = REIPL_METHOD_FCP_DUMP;
998 break;
999 case IPL_TYPE_NSS:
1000 if (diag308_set_works)
1001 reipl_method = REIPL_METHOD_NSS_DIAG;
1002 else
1003 reipl_method = REIPL_METHOD_NSS;
1004 set_reipl_block_actual(reipl_block_nss);
1005 break;
1006 case IPL_TYPE_UNKNOWN:
1007 reipl_method = REIPL_METHOD_DEFAULT;
1008 break;
1009 default:
1010 BUG();
1011 }
1012 reipl_type = type;
1013 return 0;
1014 }
1015
1016 static ssize_t reipl_type_show(struct kobject *kobj,
1017 struct kobj_attribute *attr, char *page)
1018 {
1019 return sprintf(page, "%s\n", ipl_type_str(reipl_type));
1020 }
1021
1022 static ssize_t reipl_type_store(struct kobject *kobj,
1023 struct kobj_attribute *attr,
1024 const char *buf, size_t len)
1025 {
1026 int rc = -EINVAL;
1027
1028 if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
1029 rc = reipl_set_type(IPL_TYPE_CCW);
1030 else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
1031 rc = reipl_set_type(IPL_TYPE_FCP);
1032 else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
1033 rc = reipl_set_type(IPL_TYPE_NSS);
1034 return (rc != 0) ? rc : len;
1035 }
1036
1037 static struct kobj_attribute reipl_type_attr =
1038 __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
1039
1040 static struct kset *reipl_kset;
1041 static struct kset *reipl_fcp_kset;
1042
1043 static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
1044 const enum ipl_method m)
1045 {
1046 char loadparm[LOADPARM_LEN + 1] = {};
1047 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
1048 char nss_name[NSS_NAME_SIZE + 1] = {};
1049 size_t pos = 0;
1050
1051 reipl_get_ascii_loadparm(loadparm, ipb);
1052 reipl_get_ascii_nss_name(nss_name, ipb);
1053 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
1054
1055 switch (m) {
1056 case REIPL_METHOD_CCW_VM:
1057 pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
1058 break;
1059 case REIPL_METHOD_NSS:
1060 pos = sprintf(dst, "IPL %s", nss_name);
1061 break;
1062 default:
1063 break;
1064 }
1065 if (strlen(loadparm) > 0)
1066 pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
1067 if (strlen(vmparm) > 0)
1068 sprintf(dst + pos, " PARM %s", vmparm);
1069 }
1070
1071 static void __reipl_run(void *unused)
1072 {
1073 struct ccw_dev_id devid;
1074 static char buf[128];
1075
1076 switch (reipl_method) {
1077 case REIPL_METHOD_CCW_CIO:
1078 devid.ssid = reipl_block_ccw->ipl_info.ccw.ssid;
1079 devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
1080 reipl_ccw_dev(&devid);
1081 break;
1082 case REIPL_METHOD_CCW_VM:
1083 get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
1084 __cpcmd(buf, NULL, 0, NULL);
1085 break;
1086 case REIPL_METHOD_CCW_DIAG:
1087 diag308(DIAG308_SET, reipl_block_ccw);
1088 if (MACHINE_IS_LPAR)
1089 diag308(DIAG308_LOAD_NORMAL_DUMP, NULL);
1090 else
1091 diag308(DIAG308_LOAD_CLEAR, NULL);
1092 break;
1093 case REIPL_METHOD_FCP_RW_DIAG:
1094 diag308(DIAG308_SET, reipl_block_fcp);
1095 diag308(DIAG308_LOAD_CLEAR, NULL);
1096 break;
1097 case REIPL_METHOD_FCP_RO_DIAG:
1098 diag308(DIAG308_LOAD_CLEAR, NULL);
1099 break;
1100 case REIPL_METHOD_FCP_RO_VM:
1101 __cpcmd("IPL", NULL, 0, NULL);
1102 break;
1103 case REIPL_METHOD_NSS_DIAG:
1104 diag308(DIAG308_SET, reipl_block_nss);
1105 diag308(DIAG308_LOAD_CLEAR, NULL);
1106 break;
1107 case REIPL_METHOD_NSS:
1108 get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
1109 __cpcmd(buf, NULL, 0, NULL);
1110 break;
1111 case REIPL_METHOD_DEFAULT:
1112 if (MACHINE_IS_VM)
1113 __cpcmd("IPL", NULL, 0, NULL);
1114 diag308(DIAG308_LOAD_CLEAR, NULL);
1115 break;
1116 case REIPL_METHOD_FCP_DUMP:
1117 break;
1118 }
1119 disabled_wait((unsigned long) __builtin_return_address(0));
1120 }
1121
1122 static void reipl_run(struct shutdown_trigger *trigger)
1123 {
1124 smp_call_ipl_cpu(__reipl_run, NULL);
1125 }
1126
1127 static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
1128 {
1129 ipb->hdr.len = IPL_PARM_BLK_CCW_LEN;
1130 ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
1131 ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1132 ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1133 }
1134
1135 static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
1136 {
1137 /* LOADPARM */
1138 /* check if read scp info worked and set loadparm */
1139 if (sclp_ipl_info.is_valid)
1140 memcpy(ipb->hdr.loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
1141 else
1142 /* read scp info failed: set empty loadparm (EBCDIC blanks) */
1143 memset(ipb->hdr.loadparm, 0x40, LOADPARM_LEN);
1144 ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
1145
1146 /* VM PARM */
1147 if (MACHINE_IS_VM && diag308_set_works &&
1148 (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
1149
1150 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
1151 ipb->ipl_info.ccw.vm_parm_len =
1152 ipl_block.ipl_info.ccw.vm_parm_len;
1153 memcpy(ipb->ipl_info.ccw.vm_parm,
1154 ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE);
1155 }
1156 }
1157
1158 static int __init reipl_nss_init(void)
1159 {
1160 int rc;
1161
1162 if (!MACHINE_IS_VM)
1163 return 0;
1164
1165 reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
1166 if (!reipl_block_nss)
1167 return -ENOMEM;
1168
1169 if (!diag308_set_works)
1170 sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO;
1171
1172 rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
1173 if (rc)
1174 return rc;
1175
1176 reipl_block_ccw_init(reipl_block_nss);
1177 if (ipl_info.type == IPL_TYPE_NSS) {
1178 memset(reipl_block_nss->ipl_info.ccw.nss_name,
1179 ' ', NSS_NAME_SIZE);
1180 memcpy(reipl_block_nss->ipl_info.ccw.nss_name,
1181 kernel_nss_name, strlen(kernel_nss_name));
1182 ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
1183 reipl_block_nss->ipl_info.ccw.vm_flags |=
1184 DIAG308_VM_FLAGS_NSS_VALID;
1185
1186 reipl_block_ccw_fill_parms(reipl_block_nss);
1187 }
1188
1189 reipl_capabilities |= IPL_TYPE_NSS;
1190 return 0;
1191 }
1192
1193 static int __init reipl_ccw_init(void)
1194 {
1195 int rc;
1196
1197 reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1198 if (!reipl_block_ccw)
1199 return -ENOMEM;
1200
1201 if (MACHINE_IS_VM) {
1202 if (!diag308_set_works)
1203 sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
1204 rc = sysfs_create_group(&reipl_kset->kobj,
1205 &reipl_ccw_attr_group_vm);
1206 } else {
1207 if(!diag308_set_works)
1208 sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
1209 rc = sysfs_create_group(&reipl_kset->kobj,
1210 &reipl_ccw_attr_group_lpar);
1211 }
1212 if (rc)
1213 return rc;
1214
1215 reipl_block_ccw_init(reipl_block_ccw);
1216 if (ipl_info.type == IPL_TYPE_CCW) {
1217 reipl_block_ccw->ipl_info.ccw.ssid = ipl_ssid;
1218 reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
1219 reipl_block_ccw_fill_parms(reipl_block_ccw);
1220 }
1221
1222 reipl_capabilities |= IPL_TYPE_CCW;
1223 return 0;
1224 }
1225
1226 static int __init reipl_fcp_init(void)
1227 {
1228 int rc;
1229
1230 if (!diag308_set_works) {
1231 if (ipl_info.type == IPL_TYPE_FCP) {
1232 make_attrs_ro(reipl_fcp_attrs);
1233 sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO;
1234 } else
1235 return 0;
1236 }
1237
1238 reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1239 if (!reipl_block_fcp)
1240 return -ENOMEM;
1241
1242 /* sysfs: create fcp kset for mixing attr group and bin attrs */
1243 reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
1244 &reipl_kset->kobj);
1245 if (!reipl_fcp_kset) {
1246 free_page((unsigned long) reipl_block_fcp);
1247 return -ENOMEM;
1248 }
1249
1250 rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
1251 if (rc) {
1252 kset_unregister(reipl_fcp_kset);
1253 free_page((unsigned long) reipl_block_fcp);
1254 return rc;
1255 }
1256
1257 if (ipl_info.type == IPL_TYPE_FCP) {
1258 memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
1259 /*
1260 * Fix loadparm: There are systems where the (SCSI) LOADPARM
1261 * is invalid in the SCSI IPL parameter block, so take it
1262 * always from sclp_ipl_info.
1263 */
1264 memcpy(reipl_block_fcp->hdr.loadparm, sclp_ipl_info.loadparm,
1265 LOADPARM_LEN);
1266 } else {
1267 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1268 reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1269 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1270 reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1271 reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
1272 }
1273 reipl_capabilities |= IPL_TYPE_FCP;
1274 return 0;
1275 }
1276
1277 static int __init reipl_type_init(void)
1278 {
1279 enum ipl_type reipl_type = ipl_info.type;
1280 struct ipl_parameter_block *reipl_block;
1281 unsigned long size;
1282
1283 reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size);
1284 if (!reipl_block)
1285 goto out;
1286 /*
1287 * If we have an OS info reipl block, this will be used
1288 */
1289 if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_FCP) {
1290 memcpy(reipl_block_fcp, reipl_block, size);
1291 reipl_type = IPL_TYPE_FCP;
1292 } else if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_CCW) {
1293 memcpy(reipl_block_ccw, reipl_block, size);
1294 reipl_type = IPL_TYPE_CCW;
1295 }
1296 out:
1297 return reipl_set_type(reipl_type);
1298 }
1299
1300 static int __init reipl_init(void)
1301 {
1302 int rc;
1303
1304 reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1305 if (!reipl_kset)
1306 return -ENOMEM;
1307 rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
1308 if (rc) {
1309 kset_unregister(reipl_kset);
1310 return rc;
1311 }
1312 rc = reipl_ccw_init();
1313 if (rc)
1314 return rc;
1315 rc = reipl_fcp_init();
1316 if (rc)
1317 return rc;
1318 rc = reipl_nss_init();
1319 if (rc)
1320 return rc;
1321 return reipl_type_init();
1322 }
1323
1324 static struct shutdown_action __refdata reipl_action = {
1325 .name = SHUTDOWN_ACTION_REIPL_STR,
1326 .fn = reipl_run,
1327 .init = reipl_init,
1328 };
1329
1330 /*
1331 * dump shutdown action: Dump Linux on shutdown.
1332 */
1333
1334 /* FCP dump device attributes */
1335
1336 DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n",
1337 dump_block_fcp->ipl_info.fcp.wwpn);
1338 DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n",
1339 dump_block_fcp->ipl_info.fcp.lun);
1340 DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
1341 dump_block_fcp->ipl_info.fcp.bootprog);
1342 DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
1343 dump_block_fcp->ipl_info.fcp.br_lba);
1344 DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
1345 dump_block_fcp->ipl_info.fcp.devno);
1346
1347 static struct attribute *dump_fcp_attrs[] = {
1348 &sys_dump_fcp_device_attr.attr,
1349 &sys_dump_fcp_wwpn_attr.attr,
1350 &sys_dump_fcp_lun_attr.attr,
1351 &sys_dump_fcp_bootprog_attr.attr,
1352 &sys_dump_fcp_br_lba_attr.attr,
1353 NULL,
1354 };
1355
1356 static struct attribute_group dump_fcp_attr_group = {
1357 .name = IPL_FCP_STR,
1358 .attrs = dump_fcp_attrs,
1359 };
1360
1361 /* CCW dump device attributes */
1362 DEFINE_IPL_CCW_ATTR_RW(dump_ccw, device, dump_block_ccw->ipl_info.ccw);
1363
1364 static struct attribute *dump_ccw_attrs[] = {
1365 &sys_dump_ccw_device_attr.attr,
1366 NULL,
1367 };
1368
1369 static struct attribute_group dump_ccw_attr_group = {
1370 .name = IPL_CCW_STR,
1371 .attrs = dump_ccw_attrs,
1372 };
1373
1374 /* dump type */
1375
1376 static int dump_set_type(enum dump_type type)
1377 {
1378 if (!(dump_capabilities & type))
1379 return -EINVAL;
1380 switch (type) {
1381 case DUMP_TYPE_CCW:
1382 if (diag308_set_works)
1383 dump_method = DUMP_METHOD_CCW_DIAG;
1384 else if (MACHINE_IS_VM)
1385 dump_method = DUMP_METHOD_CCW_VM;
1386 else
1387 dump_method = DUMP_METHOD_CCW_CIO;
1388 break;
1389 case DUMP_TYPE_FCP:
1390 dump_method = DUMP_METHOD_FCP_DIAG;
1391 break;
1392 default:
1393 dump_method = DUMP_METHOD_NONE;
1394 }
1395 dump_type = type;
1396 return 0;
1397 }
1398
1399 static ssize_t dump_type_show(struct kobject *kobj,
1400 struct kobj_attribute *attr, char *page)
1401 {
1402 return sprintf(page, "%s\n", dump_type_str(dump_type));
1403 }
1404
1405 static ssize_t dump_type_store(struct kobject *kobj,
1406 struct kobj_attribute *attr,
1407 const char *buf, size_t len)
1408 {
1409 int rc = -EINVAL;
1410
1411 if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
1412 rc = dump_set_type(DUMP_TYPE_NONE);
1413 else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
1414 rc = dump_set_type(DUMP_TYPE_CCW);
1415 else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
1416 rc = dump_set_type(DUMP_TYPE_FCP);
1417 return (rc != 0) ? rc : len;
1418 }
1419
1420 static struct kobj_attribute dump_type_attr =
1421 __ATTR(dump_type, 0644, dump_type_show, dump_type_store);
1422
1423 static struct kset *dump_kset;
1424
1425 static void diag308_dump(void *dump_block)
1426 {
1427 diag308(DIAG308_SET, dump_block);
1428 while (1) {
1429 if (diag308(DIAG308_LOAD_NORMAL_DUMP, NULL) != 0x302)
1430 break;
1431 udelay_simple(USEC_PER_SEC);
1432 }
1433 }
1434
1435 static void __dump_run(void *unused)
1436 {
1437 struct ccw_dev_id devid;
1438 static char buf[100];
1439
1440 switch (dump_method) {
1441 case DUMP_METHOD_CCW_CIO:
1442 devid.ssid = dump_block_ccw->ipl_info.ccw.ssid;
1443 devid.devno = dump_block_ccw->ipl_info.ccw.devno;
1444 reipl_ccw_dev(&devid);
1445 break;
1446 case DUMP_METHOD_CCW_VM:
1447 sprintf(buf, "STORE STATUS");
1448 __cpcmd(buf, NULL, 0, NULL);
1449 sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
1450 __cpcmd(buf, NULL, 0, NULL);
1451 break;
1452 case DUMP_METHOD_CCW_DIAG:
1453 diag308_dump(dump_block_ccw);
1454 break;
1455 case DUMP_METHOD_FCP_DIAG:
1456 diag308_dump(dump_block_fcp);
1457 break;
1458 default:
1459 break;
1460 }
1461 }
1462
1463 static void dump_run(struct shutdown_trigger *trigger)
1464 {
1465 if (dump_method == DUMP_METHOD_NONE)
1466 return;
1467 smp_send_stop();
1468 smp_call_ipl_cpu(__dump_run, NULL);
1469 }
1470
1471 static int __init dump_ccw_init(void)
1472 {
1473 int rc;
1474
1475 dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
1476 if (!dump_block_ccw)
1477 return -ENOMEM;
1478 rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
1479 if (rc) {
1480 free_page((unsigned long)dump_block_ccw);
1481 return rc;
1482 }
1483 dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
1484 dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
1485 dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
1486 dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
1487 dump_capabilities |= DUMP_TYPE_CCW;
1488 return 0;
1489 }
1490
1491 static int __init dump_fcp_init(void)
1492 {
1493 int rc;
1494
1495 if (!sclp_ipl_info.has_dump)
1496 return 0; /* LDIPL DUMP is not installed */
1497 if (!diag308_set_works)
1498 return 0;
1499 dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
1500 if (!dump_block_fcp)
1501 return -ENOMEM;
1502 rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
1503 if (rc) {
1504 free_page((unsigned long)dump_block_fcp);
1505 return rc;
1506 }
1507 dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
1508 dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
1509 dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
1510 dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
1511 dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
1512 dump_capabilities |= DUMP_TYPE_FCP;
1513 return 0;
1514 }
1515
1516 static int __init dump_init(void)
1517 {
1518 int rc;
1519
1520 dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1521 if (!dump_kset)
1522 return -ENOMEM;
1523 rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
1524 if (rc) {
1525 kset_unregister(dump_kset);
1526 return rc;
1527 }
1528 rc = dump_ccw_init();
1529 if (rc)
1530 return rc;
1531 rc = dump_fcp_init();
1532 if (rc)
1533 return rc;
1534 dump_set_type(DUMP_TYPE_NONE);
1535 return 0;
1536 }
1537
1538 static struct shutdown_action __refdata dump_action = {
1539 .name = SHUTDOWN_ACTION_DUMP_STR,
1540 .fn = dump_run,
1541 .init = dump_init,
1542 };
1543
1544 static void dump_reipl_run(struct shutdown_trigger *trigger)
1545 {
1546 unsigned long ipib = (unsigned long) reipl_block_actual;
1547 unsigned int csum;
1548
1549 csum = csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
1550 mem_assign_absolute(S390_lowcore.ipib, ipib);
1551 mem_assign_absolute(S390_lowcore.ipib_checksum, csum);
1552 dump_run(trigger);
1553 }
1554
1555 static int __init dump_reipl_init(void)
1556 {
1557 if (!diag308_set_works)
1558 return -EOPNOTSUPP;
1559 else
1560 return 0;
1561 }
1562
1563 static struct shutdown_action __refdata dump_reipl_action = {
1564 .name = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1565 .fn = dump_reipl_run,
1566 .init = dump_reipl_init,
1567 };
1568
1569 /*
1570 * vmcmd shutdown action: Trigger vm command on shutdown.
1571 */
1572
1573 static char vmcmd_on_reboot[128];
1574 static char vmcmd_on_panic[128];
1575 static char vmcmd_on_halt[128];
1576 static char vmcmd_on_poff[128];
1577 static char vmcmd_on_restart[128];
1578
1579 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1580 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1581 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1582 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1583 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1584
1585 static struct attribute *vmcmd_attrs[] = {
1586 &sys_vmcmd_on_reboot_attr.attr,
1587 &sys_vmcmd_on_panic_attr.attr,
1588 &sys_vmcmd_on_halt_attr.attr,
1589 &sys_vmcmd_on_poff_attr.attr,
1590 &sys_vmcmd_on_restart_attr.attr,
1591 NULL,
1592 };
1593
1594 static struct attribute_group vmcmd_attr_group = {
1595 .attrs = vmcmd_attrs,
1596 };
1597
1598 static struct kset *vmcmd_kset;
1599
1600 static void vmcmd_run(struct shutdown_trigger *trigger)
1601 {
1602 char *cmd;
1603
1604 if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1605 cmd = vmcmd_on_reboot;
1606 else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1607 cmd = vmcmd_on_panic;
1608 else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1609 cmd = vmcmd_on_halt;
1610 else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1611 cmd = vmcmd_on_poff;
1612 else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
1613 cmd = vmcmd_on_restart;
1614 else
1615 return;
1616
1617 if (strlen(cmd) == 0)
1618 return;
1619 __cpcmd(cmd, NULL, 0, NULL);
1620 }
1621
1622 static int vmcmd_init(void)
1623 {
1624 if (!MACHINE_IS_VM)
1625 return -EOPNOTSUPP;
1626 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1627 if (!vmcmd_kset)
1628 return -ENOMEM;
1629 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1630 }
1631
1632 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1633 vmcmd_run, vmcmd_init};
1634
1635 /*
1636 * stop shutdown action: Stop Linux on shutdown.
1637 */
1638
1639 static void stop_run(struct shutdown_trigger *trigger)
1640 {
1641 if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
1642 strcmp(trigger->name, ON_RESTART_STR) == 0)
1643 disabled_wait((unsigned long) __builtin_return_address(0));
1644 smp_stop_cpu();
1645 }
1646
1647 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1648 stop_run, NULL};
1649
1650 /* action list */
1651
1652 static struct shutdown_action *shutdown_actions_list[] = {
1653 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1654 &vmcmd_action, &stop_action};
1655 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1656
1657 /*
1658 * Trigger section
1659 */
1660
1661 static struct kset *shutdown_actions_kset;
1662
1663 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1664 size_t len)
1665 {
1666 int i;
1667
1668 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1669 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1670 if (shutdown_actions_list[i]->init_rc) {
1671 return shutdown_actions_list[i]->init_rc;
1672 } else {
1673 trigger->action = shutdown_actions_list[i];
1674 return len;
1675 }
1676 }
1677 }
1678 return -EINVAL;
1679 }
1680
1681 /* on reipl */
1682
1683 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1684 &reipl_action};
1685
1686 static ssize_t on_reboot_show(struct kobject *kobj,
1687 struct kobj_attribute *attr, char *page)
1688 {
1689 return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1690 }
1691
1692 static ssize_t on_reboot_store(struct kobject *kobj,
1693 struct kobj_attribute *attr,
1694 const char *buf, size_t len)
1695 {
1696 return set_trigger(buf, &on_reboot_trigger, len);
1697 }
1698 static struct kobj_attribute on_reboot_attr = __ATTR_RW(on_reboot);
1699
1700 static void do_machine_restart(char *__unused)
1701 {
1702 smp_send_stop();
1703 on_reboot_trigger.action->fn(&on_reboot_trigger);
1704 reipl_run(NULL);
1705 }
1706 void (*_machine_restart)(char *command) = do_machine_restart;
1707
1708 /* on panic */
1709
1710 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1711
1712 static ssize_t on_panic_show(struct kobject *kobj,
1713 struct kobj_attribute *attr, char *page)
1714 {
1715 return sprintf(page, "%s\n", on_panic_trigger.action->name);
1716 }
1717
1718 static ssize_t on_panic_store(struct kobject *kobj,
1719 struct kobj_attribute *attr,
1720 const char *buf, size_t len)
1721 {
1722 return set_trigger(buf, &on_panic_trigger, len);
1723 }
1724 static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic);
1725
1726 static void do_panic(void)
1727 {
1728 lgr_info_log();
1729 on_panic_trigger.action->fn(&on_panic_trigger);
1730 stop_run(&on_panic_trigger);
1731 }
1732
1733 /* on restart */
1734
1735 static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
1736 &stop_action};
1737
1738 static ssize_t on_restart_show(struct kobject *kobj,
1739 struct kobj_attribute *attr, char *page)
1740 {
1741 return sprintf(page, "%s\n", on_restart_trigger.action->name);
1742 }
1743
1744 static ssize_t on_restart_store(struct kobject *kobj,
1745 struct kobj_attribute *attr,
1746 const char *buf, size_t len)
1747 {
1748 return set_trigger(buf, &on_restart_trigger, len);
1749 }
1750 static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart);
1751
1752 static void __do_restart(void *ignore)
1753 {
1754 __arch_local_irq_stosm(0x04); /* enable DAT */
1755 smp_send_stop();
1756 #ifdef CONFIG_CRASH_DUMP
1757 crash_kexec(NULL);
1758 #endif
1759 on_restart_trigger.action->fn(&on_restart_trigger);
1760 stop_run(&on_restart_trigger);
1761 }
1762
1763 void do_restart(void)
1764 {
1765 tracing_off();
1766 debug_locks_off();
1767 lgr_info_log();
1768 smp_call_online_cpu(__do_restart, NULL);
1769 }
1770
1771 /* on halt */
1772
1773 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1774
1775 static ssize_t on_halt_show(struct kobject *kobj,
1776 struct kobj_attribute *attr, char *page)
1777 {
1778 return sprintf(page, "%s\n", on_halt_trigger.action->name);
1779 }
1780
1781 static ssize_t on_halt_store(struct kobject *kobj,
1782 struct kobj_attribute *attr,
1783 const char *buf, size_t len)
1784 {
1785 return set_trigger(buf, &on_halt_trigger, len);
1786 }
1787 static struct kobj_attribute on_halt_attr = __ATTR_RW(on_halt);
1788
1789 static void do_machine_halt(void)
1790 {
1791 smp_send_stop();
1792 on_halt_trigger.action->fn(&on_halt_trigger);
1793 stop_run(&on_halt_trigger);
1794 }
1795 void (*_machine_halt)(void) = do_machine_halt;
1796
1797 /* on power off */
1798
1799 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1800
1801 static ssize_t on_poff_show(struct kobject *kobj,
1802 struct kobj_attribute *attr, char *page)
1803 {
1804 return sprintf(page, "%s\n", on_poff_trigger.action->name);
1805 }
1806
1807 static ssize_t on_poff_store(struct kobject *kobj,
1808 struct kobj_attribute *attr,
1809 const char *buf, size_t len)
1810 {
1811 return set_trigger(buf, &on_poff_trigger, len);
1812 }
1813 static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff);
1814
1815 static void do_machine_power_off(void)
1816 {
1817 smp_send_stop();
1818 on_poff_trigger.action->fn(&on_poff_trigger);
1819 stop_run(&on_poff_trigger);
1820 }
1821 void (*_machine_power_off)(void) = do_machine_power_off;
1822
1823 static struct attribute *shutdown_action_attrs[] = {
1824 &on_restart_attr.attr,
1825 &on_reboot_attr.attr,
1826 &on_panic_attr.attr,
1827 &on_halt_attr.attr,
1828 &on_poff_attr.attr,
1829 NULL,
1830 };
1831
1832 static struct attribute_group shutdown_action_attr_group = {
1833 .attrs = shutdown_action_attrs,
1834 };
1835
1836 static void __init shutdown_triggers_init(void)
1837 {
1838 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1839 firmware_kobj);
1840 if (!shutdown_actions_kset)
1841 goto fail;
1842 if (sysfs_create_group(&shutdown_actions_kset->kobj,
1843 &shutdown_action_attr_group))
1844 goto fail;
1845 return;
1846 fail:
1847 panic("shutdown_triggers_init failed\n");
1848 }
1849
1850 static void __init shutdown_actions_init(void)
1851 {
1852 int i;
1853
1854 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1855 if (!shutdown_actions_list[i]->init)
1856 continue;
1857 shutdown_actions_list[i]->init_rc =
1858 shutdown_actions_list[i]->init();
1859 }
1860 }
1861
1862 static int __init s390_ipl_init(void)
1863 {
1864 char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40};
1865
1866 sclp_get_ipl_info(&sclp_ipl_info);
1867 /*
1868 * Fix loadparm: There are systems where the (SCSI) LOADPARM
1869 * returned by read SCP info is invalid (contains EBCDIC blanks)
1870 * when the system has been booted via diag308. In that case we use
1871 * the value from diag308, if available.
1872 *
1873 * There are also systems where diag308 store does not work in
1874 * case the system is booted from HMC. Fortunately in this case
1875 * READ SCP info provides the correct value.
1876 */
1877 if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 &&
1878 diag308_set_works)
1879 memcpy(sclp_ipl_info.loadparm, ipl_block.hdr.loadparm,
1880 LOADPARM_LEN);
1881 shutdown_actions_init();
1882 shutdown_triggers_init();
1883 return 0;
1884 }
1885
1886 __initcall(s390_ipl_init);
1887
1888 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1889 {
1890 int sx, dx;
1891
1892 dx = 0;
1893 for (sx = 0; src[sx] != 0; sx++) {
1894 if (src[sx] == '"')
1895 continue;
1896 dst[dx++] = src[sx];
1897 if (dx >= n)
1898 break;
1899 }
1900 }
1901
1902 static int __init vmcmd_on_reboot_setup(char *str)
1903 {
1904 if (!MACHINE_IS_VM)
1905 return 1;
1906 strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1907 vmcmd_on_reboot[127] = 0;
1908 on_reboot_trigger.action = &vmcmd_action;
1909 return 1;
1910 }
1911 __setup("vmreboot=", vmcmd_on_reboot_setup);
1912
1913 static int __init vmcmd_on_panic_setup(char *str)
1914 {
1915 if (!MACHINE_IS_VM)
1916 return 1;
1917 strncpy_skip_quote(vmcmd_on_panic, str, 127);
1918 vmcmd_on_panic[127] = 0;
1919 on_panic_trigger.action = &vmcmd_action;
1920 return 1;
1921 }
1922 __setup("vmpanic=", vmcmd_on_panic_setup);
1923
1924 static int __init vmcmd_on_halt_setup(char *str)
1925 {
1926 if (!MACHINE_IS_VM)
1927 return 1;
1928 strncpy_skip_quote(vmcmd_on_halt, str, 127);
1929 vmcmd_on_halt[127] = 0;
1930 on_halt_trigger.action = &vmcmd_action;
1931 return 1;
1932 }
1933 __setup("vmhalt=", vmcmd_on_halt_setup);
1934
1935 static int __init vmcmd_on_poff_setup(char *str)
1936 {
1937 if (!MACHINE_IS_VM)
1938 return 1;
1939 strncpy_skip_quote(vmcmd_on_poff, str, 127);
1940 vmcmd_on_poff[127] = 0;
1941 on_poff_trigger.action = &vmcmd_action;
1942 return 1;
1943 }
1944 __setup("vmpoff=", vmcmd_on_poff_setup);
1945
1946 static int on_panic_notify(struct notifier_block *self,
1947 unsigned long event, void *data)
1948 {
1949 do_panic();
1950 return NOTIFY_OK;
1951 }
1952
1953 static struct notifier_block on_panic_nb = {
1954 .notifier_call = on_panic_notify,
1955 .priority = INT_MIN,
1956 };
1957
1958 void __init setup_ipl(void)
1959 {
1960 ipl_info.type = get_ipl_type();
1961 switch (ipl_info.type) {
1962 case IPL_TYPE_CCW:
1963 ipl_info.data.ccw.dev_id.ssid = ipl_ssid;
1964 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1965 break;
1966 case IPL_TYPE_FCP:
1967 case IPL_TYPE_FCP_DUMP:
1968 ipl_info.data.fcp.dev_id.ssid = 0;
1969 ipl_info.data.fcp.dev_id.devno =
1970 IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1971 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1972 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1973 break;
1974 case IPL_TYPE_NSS:
1975 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1976 sizeof(ipl_info.data.nss.name));
1977 break;
1978 case IPL_TYPE_UNKNOWN:
1979 /* We have no info to copy */
1980 break;
1981 }
1982 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1983 }
1984
1985 void __init ipl_update_parameters(void)
1986 {
1987 int rc;
1988
1989 rc = diag308(DIAG308_STORE, &ipl_block);
1990 if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
1991 diag308_set_works = 1;
1992 }
1993
1994 void __init ipl_save_parameters(void)
1995 {
1996 struct cio_iplinfo iplinfo;
1997 void *src, *dst;
1998
1999 if (cio_get_iplinfo(&iplinfo))
2000 return;
2001
2002 ipl_ssid = iplinfo.ssid;
2003 ipl_devno = iplinfo.devno;
2004 ipl_flags |= IPL_DEVNO_VALID;
2005 if (!iplinfo.is_qdio)
2006 return;
2007 ipl_flags |= IPL_PARMBLOCK_VALID;
2008 src = (void *)(unsigned long)S390_lowcore.ipl_parmblock_ptr;
2009 dst = (void *)IPL_PARMBLOCK_ORIGIN;
2010 memmove(dst, src, PAGE_SIZE);
2011 S390_lowcore.ipl_parmblock_ptr = IPL_PARMBLOCK_ORIGIN;
2012 }
2013
2014 static LIST_HEAD(rcall);
2015 static DEFINE_MUTEX(rcall_mutex);
2016
2017 void register_reset_call(struct reset_call *reset)
2018 {
2019 mutex_lock(&rcall_mutex);
2020 list_add(&reset->list, &rcall);
2021 mutex_unlock(&rcall_mutex);
2022 }
2023 EXPORT_SYMBOL_GPL(register_reset_call);
2024
2025 void unregister_reset_call(struct reset_call *reset)
2026 {
2027 mutex_lock(&rcall_mutex);
2028 list_del(&reset->list);
2029 mutex_unlock(&rcall_mutex);
2030 }
2031 EXPORT_SYMBOL_GPL(unregister_reset_call);
2032
2033 static void do_reset_calls(void)
2034 {
2035 struct reset_call *reset;
2036
2037 if (diag308_set_works) {
2038 diag308_reset();
2039 return;
2040 }
2041 list_for_each_entry(reset, &rcall, list)
2042 reset->fn();
2043 }
2044
2045 void s390_reset_system(void)
2046 {
2047 struct lowcore *lc;
2048
2049 lc = (struct lowcore *)(unsigned long) store_prefix();
2050
2051 /* Stack for interrupt/machine check handler */
2052 lc->panic_stack = S390_lowcore.panic_stack;
2053
2054 /* Disable prefixing */
2055 set_prefix(0);
2056
2057 /* Disable lowcore protection */
2058 __ctl_clear_bit(0,28);
2059
2060 /* Set new machine check handler */
2061 S390_lowcore.mcck_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
2062 S390_lowcore.mcck_new_psw.addr =
2063 (unsigned long) s390_base_mcck_handler;
2064
2065 /* Set new program check handler */
2066 S390_lowcore.program_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
2067 S390_lowcore.program_new_psw.addr =
2068 (unsigned long) s390_base_pgm_handler;
2069
2070 do_reset_calls();
2071 }
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