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
ipl_type_str(enum ipl_type type)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
dump_type_str(enum dump_type type)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
__diag308(unsigned long subcode,void * addr)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
diag308(unsigned long subcode,void * addr)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
make_attrs_ro(struct attribute ** attrs)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
get_ipl_type(void)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
ipl_type_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)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 */
reipl_get_ascii_vmparm(char * dest,size_t size,const struct ipl_parameter_block * ipb)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
append_ipl_vmparm(char * dest,size_t size)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
ipl_vm_parm_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)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
scpdata_length(const char * buf,size_t count)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
reipl_append_ascii_scpdata(char * dest,size_t size,const struct ipl_parameter_block * ipb)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
append_ipl_scpdata(char * dest,size_t len)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
sys_ipl_device_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)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
ipl_parameter_read(struct file * filp,struct kobject * kobj,struct bin_attribute * attr,char * buf,loff_t off,size_t count)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
ipl_scp_data_read(struct file * filp,struct kobject * kobj,struct bin_attribute * attr,char * buf,loff_t off,size_t count)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
ipl_ccw_loadparm_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)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
__ipl_run(void * unused)565 static void __ipl_run(void *unused)
566 {
567 __bpon();
568 diag308(DIAG308_LOAD_CLEAR, NULL);
569 if (MACHINE_IS_VM)
570 __cpcmd("IPL", NULL, 0, NULL);
571 else if (ipl_info.type == IPL_TYPE_CCW)
572 reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
573 }
574
ipl_run(struct shutdown_trigger * trigger)575 static void ipl_run(struct shutdown_trigger *trigger)
576 {
577 smp_call_ipl_cpu(__ipl_run, NULL);
578 }
579
ipl_init(void)580 static int __init ipl_init(void)
581 {
582 int rc;
583
584 ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
585 if (!ipl_kset) {
586 rc = -ENOMEM;
587 goto out;
588 }
589 switch (ipl_info.type) {
590 case IPL_TYPE_CCW:
591 if (MACHINE_IS_VM)
592 rc = sysfs_create_group(&ipl_kset->kobj,
593 &ipl_ccw_attr_group_vm);
594 else
595 rc = sysfs_create_group(&ipl_kset->kobj,
596 &ipl_ccw_attr_group_lpar);
597 break;
598 case IPL_TYPE_FCP:
599 case IPL_TYPE_FCP_DUMP:
600 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
601 break;
602 case IPL_TYPE_NSS:
603 rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group);
604 break;
605 default:
606 rc = sysfs_create_group(&ipl_kset->kobj,
607 &ipl_unknown_attr_group);
608 break;
609 }
610 out:
611 if (rc)
612 panic("ipl_init failed: rc = %i\n", rc);
613
614 return 0;
615 }
616
617 static struct shutdown_action __refdata ipl_action = {
618 .name = SHUTDOWN_ACTION_IPL_STR,
619 .fn = ipl_run,
620 .init = ipl_init,
621 };
622
623 /*
624 * reipl shutdown action: Reboot Linux on shutdown.
625 */
626
627 /* VM IPL PARM attributes */
reipl_generic_vmparm_show(struct ipl_parameter_block * ipb,char * page)628 static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
629 char *page)
630 {
631 char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
632
633 reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
634 return sprintf(page, "%s\n", vmparm);
635 }
636
reipl_generic_vmparm_store(struct ipl_parameter_block * ipb,size_t vmparm_max,const char * buf,size_t len)637 static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
638 size_t vmparm_max,
639 const char *buf, size_t len)
640 {
641 int i, ip_len;
642
643 /* ignore trailing newline */
644 ip_len = len;
645 if ((len > 0) && (buf[len - 1] == '\n'))
646 ip_len--;
647
648 if (ip_len > vmparm_max)
649 return -EINVAL;
650
651 /* parm is used to store kernel options, check for common chars */
652 for (i = 0; i < ip_len; i++)
653 if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
654 return -EINVAL;
655
656 memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
657 ipb->ipl_info.ccw.vm_parm_len = ip_len;
658 if (ip_len > 0) {
659 ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
660 memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
661 ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
662 } else {
663 ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
664 }
665
666 return len;
667 }
668
669 /* NSS wrapper */
reipl_nss_vmparm_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)670 static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
671 struct kobj_attribute *attr, char *page)
672 {
673 return reipl_generic_vmparm_show(reipl_block_nss, page);
674 }
675
reipl_nss_vmparm_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)676 static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
677 struct kobj_attribute *attr,
678 const char *buf, size_t len)
679 {
680 return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
681 }
682
683 /* CCW wrapper */
reipl_ccw_vmparm_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)684 static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
685 struct kobj_attribute *attr, char *page)
686 {
687 return reipl_generic_vmparm_show(reipl_block_ccw, page);
688 }
689
reipl_ccw_vmparm_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)690 static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
691 struct kobj_attribute *attr,
692 const char *buf, size_t len)
693 {
694 return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
695 }
696
697 static struct kobj_attribute sys_reipl_nss_vmparm_attr =
698 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
699 reipl_nss_vmparm_store);
700 static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
701 __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
702 reipl_ccw_vmparm_store);
703
704 /* FCP reipl device attributes */
705
reipl_fcp_scpdata_read(struct file * filp,struct kobject * kobj,struct bin_attribute * attr,char * buf,loff_t off,size_t count)706 static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
707 struct bin_attribute *attr,
708 char *buf, loff_t off, size_t count)
709 {
710 size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
711 void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
712
713 return memory_read_from_buffer(buf, count, &off, scp_data, size);
714 }
715
reipl_fcp_scpdata_write(struct file * filp,struct kobject * kobj,struct bin_attribute * attr,char * buf,loff_t off,size_t count)716 static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
717 struct bin_attribute *attr,
718 char *buf, loff_t off, size_t count)
719 {
720 size_t scpdata_len = count;
721 size_t padding;
722
723
724 if (off)
725 return -EINVAL;
726
727 memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf, count);
728 if (scpdata_len % 8) {
729 padding = 8 - (scpdata_len % 8);
730 memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
731 0, padding);
732 scpdata_len += padding;
733 }
734
735 reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
736 reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
737 reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
738
739 return count;
740 }
741 static struct bin_attribute sys_reipl_fcp_scp_data_attr =
742 __BIN_ATTR(scp_data, (S_IRUGO | S_IWUSR), reipl_fcp_scpdata_read,
743 reipl_fcp_scpdata_write, DIAG308_SCPDATA_SIZE);
744
745 static struct bin_attribute *reipl_fcp_bin_attrs[] = {
746 &sys_reipl_fcp_scp_data_attr,
747 NULL,
748 };
749
750 DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n",
751 reipl_block_fcp->ipl_info.fcp.wwpn);
752 DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n",
753 reipl_block_fcp->ipl_info.fcp.lun);
754 DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
755 reipl_block_fcp->ipl_info.fcp.bootprog);
756 DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
757 reipl_block_fcp->ipl_info.fcp.br_lba);
758 DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
759 reipl_block_fcp->ipl_info.fcp.devno);
760
reipl_get_ascii_loadparm(char * loadparm,struct ipl_parameter_block * ibp)761 static void reipl_get_ascii_loadparm(char *loadparm,
762 struct ipl_parameter_block *ibp)
763 {
764 memcpy(loadparm, ibp->hdr.loadparm, LOADPARM_LEN);
765 EBCASC(loadparm, LOADPARM_LEN);
766 loadparm[LOADPARM_LEN] = 0;
767 strim(loadparm);
768 }
769
reipl_generic_loadparm_show(struct ipl_parameter_block * ipb,char * page)770 static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
771 char *page)
772 {
773 char buf[LOADPARM_LEN + 1];
774
775 reipl_get_ascii_loadparm(buf, ipb);
776 return sprintf(page, "%s\n", buf);
777 }
778
reipl_generic_loadparm_store(struct ipl_parameter_block * ipb,const char * buf,size_t len)779 static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
780 const char *buf, size_t len)
781 {
782 int i, lp_len;
783
784 /* ignore trailing newline */
785 lp_len = len;
786 if ((len > 0) && (buf[len - 1] == '\n'))
787 lp_len--;
788 /* loadparm can have max 8 characters and must not start with a blank */
789 if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
790 return -EINVAL;
791 /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
792 for (i = 0; i < lp_len; i++) {
793 if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
794 (buf[i] == '.'))
795 continue;
796 return -EINVAL;
797 }
798 /* initialize loadparm with blanks */
799 memset(ipb->hdr.loadparm, ' ', LOADPARM_LEN);
800 /* copy and convert to ebcdic */
801 memcpy(ipb->hdr.loadparm, buf, lp_len);
802 ASCEBC(ipb->hdr.loadparm, LOADPARM_LEN);
803 ipb->hdr.flags |= DIAG308_FLAGS_LP_VALID;
804 return len;
805 }
806
807 /* FCP wrapper */
reipl_fcp_loadparm_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)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
reipl_fcp_loadparm_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)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 */
reipl_nss_loadparm_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)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
reipl_nss_loadparm_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)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 */
reipl_ccw_loadparm_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)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
reipl_ccw_loadparm_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)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 */
reipl_get_ascii_nss_name(char * dst,struct ipl_parameter_block * ipb)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
reipl_nss_name_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)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
reipl_nss_name_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)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
set_reipl_block_actual(struct ipl_parameter_block * reipl_block)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
reipl_set_type(enum ipl_type type)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
reipl_type_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)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
reipl_type_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)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
get_ipl_string(char * dst,struct ipl_parameter_block * ipb,const enum ipl_method m)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
__reipl_run(void * unused)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 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
reipl_run(struct shutdown_trigger * trigger)1122 static void reipl_run(struct shutdown_trigger *trigger)
1123 {
1124 smp_call_ipl_cpu(__reipl_run, NULL);
1125 }
1126
reipl_block_ccw_init(struct ipl_parameter_block * ipb)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
reipl_block_ccw_fill_parms(struct ipl_parameter_block * ipb)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
reipl_nss_init(void)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
reipl_ccw_init(void)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
reipl_fcp_init(void)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
reipl_type_init(void)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
reipl_init(void)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
dump_set_type(enum dump_type type)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
dump_type_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)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
dump_type_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)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
diag308_dump(void * dump_block)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
__dump_run(void * unused)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
dump_run(struct shutdown_trigger * trigger)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
dump_ccw_init(void)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
dump_fcp_init(void)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
dump_init(void)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
dump_reipl_run(struct shutdown_trigger * trigger)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 = (__force unsigned int)
1550 csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
1551 mem_assign_absolute(S390_lowcore.ipib, ipib);
1552 mem_assign_absolute(S390_lowcore.ipib_checksum, csum);
1553 dump_run(trigger);
1554 }
1555
dump_reipl_init(void)1556 static int __init dump_reipl_init(void)
1557 {
1558 if (!diag308_set_works)
1559 return -EOPNOTSUPP;
1560 else
1561 return 0;
1562 }
1563
1564 static struct shutdown_action __refdata dump_reipl_action = {
1565 .name = SHUTDOWN_ACTION_DUMP_REIPL_STR,
1566 .fn = dump_reipl_run,
1567 .init = dump_reipl_init,
1568 };
1569
1570 /*
1571 * vmcmd shutdown action: Trigger vm command on shutdown.
1572 */
1573
1574 static char vmcmd_on_reboot[128];
1575 static char vmcmd_on_panic[128];
1576 static char vmcmd_on_halt[128];
1577 static char vmcmd_on_poff[128];
1578 static char vmcmd_on_restart[128];
1579
1580 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
1581 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
1582 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
1583 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
1584 DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
1585
1586 static struct attribute *vmcmd_attrs[] = {
1587 &sys_vmcmd_on_reboot_attr.attr,
1588 &sys_vmcmd_on_panic_attr.attr,
1589 &sys_vmcmd_on_halt_attr.attr,
1590 &sys_vmcmd_on_poff_attr.attr,
1591 &sys_vmcmd_on_restart_attr.attr,
1592 NULL,
1593 };
1594
1595 static struct attribute_group vmcmd_attr_group = {
1596 .attrs = vmcmd_attrs,
1597 };
1598
1599 static struct kset *vmcmd_kset;
1600
vmcmd_run(struct shutdown_trigger * trigger)1601 static void vmcmd_run(struct shutdown_trigger *trigger)
1602 {
1603 char *cmd;
1604
1605 if (strcmp(trigger->name, ON_REIPL_STR) == 0)
1606 cmd = vmcmd_on_reboot;
1607 else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
1608 cmd = vmcmd_on_panic;
1609 else if (strcmp(trigger->name, ON_HALT_STR) == 0)
1610 cmd = vmcmd_on_halt;
1611 else if (strcmp(trigger->name, ON_POFF_STR) == 0)
1612 cmd = vmcmd_on_poff;
1613 else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
1614 cmd = vmcmd_on_restart;
1615 else
1616 return;
1617
1618 if (strlen(cmd) == 0)
1619 return;
1620 __cpcmd(cmd, NULL, 0, NULL);
1621 }
1622
vmcmd_init(void)1623 static int vmcmd_init(void)
1624 {
1625 if (!MACHINE_IS_VM)
1626 return -EOPNOTSUPP;
1627 vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
1628 if (!vmcmd_kset)
1629 return -ENOMEM;
1630 return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
1631 }
1632
1633 static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
1634 vmcmd_run, vmcmd_init};
1635
1636 /*
1637 * stop shutdown action: Stop Linux on shutdown.
1638 */
1639
stop_run(struct shutdown_trigger * trigger)1640 static void stop_run(struct shutdown_trigger *trigger)
1641 {
1642 if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
1643 strcmp(trigger->name, ON_RESTART_STR) == 0)
1644 disabled_wait((unsigned long) __builtin_return_address(0));
1645 smp_stop_cpu();
1646 }
1647
1648 static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
1649 stop_run, NULL};
1650
1651 /* action list */
1652
1653 static struct shutdown_action *shutdown_actions_list[] = {
1654 &ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
1655 &vmcmd_action, &stop_action};
1656 #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
1657
1658 /*
1659 * Trigger section
1660 */
1661
1662 static struct kset *shutdown_actions_kset;
1663
set_trigger(const char * buf,struct shutdown_trigger * trigger,size_t len)1664 static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
1665 size_t len)
1666 {
1667 int i;
1668
1669 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1670 if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
1671 if (shutdown_actions_list[i]->init_rc) {
1672 return shutdown_actions_list[i]->init_rc;
1673 } else {
1674 trigger->action = shutdown_actions_list[i];
1675 return len;
1676 }
1677 }
1678 }
1679 return -EINVAL;
1680 }
1681
1682 /* on reipl */
1683
1684 static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
1685 &reipl_action};
1686
on_reboot_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)1687 static ssize_t on_reboot_show(struct kobject *kobj,
1688 struct kobj_attribute *attr, char *page)
1689 {
1690 return sprintf(page, "%s\n", on_reboot_trigger.action->name);
1691 }
1692
on_reboot_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)1693 static ssize_t on_reboot_store(struct kobject *kobj,
1694 struct kobj_attribute *attr,
1695 const char *buf, size_t len)
1696 {
1697 return set_trigger(buf, &on_reboot_trigger, len);
1698 }
1699 static struct kobj_attribute on_reboot_attr = __ATTR_RW(on_reboot);
1700
do_machine_restart(char * __unused)1701 static void do_machine_restart(char *__unused)
1702 {
1703 smp_send_stop();
1704 on_reboot_trigger.action->fn(&on_reboot_trigger);
1705 reipl_run(NULL);
1706 }
1707 void (*_machine_restart)(char *command) = do_machine_restart;
1708
1709 /* on panic */
1710
1711 static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
1712
on_panic_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)1713 static ssize_t on_panic_show(struct kobject *kobj,
1714 struct kobj_attribute *attr, char *page)
1715 {
1716 return sprintf(page, "%s\n", on_panic_trigger.action->name);
1717 }
1718
on_panic_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)1719 static ssize_t on_panic_store(struct kobject *kobj,
1720 struct kobj_attribute *attr,
1721 const char *buf, size_t len)
1722 {
1723 return set_trigger(buf, &on_panic_trigger, len);
1724 }
1725 static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic);
1726
do_panic(void)1727 static void do_panic(void)
1728 {
1729 lgr_info_log();
1730 on_panic_trigger.action->fn(&on_panic_trigger);
1731 stop_run(&on_panic_trigger);
1732 }
1733
1734 /* on restart */
1735
1736 static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
1737 &stop_action};
1738
on_restart_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)1739 static ssize_t on_restart_show(struct kobject *kobj,
1740 struct kobj_attribute *attr, char *page)
1741 {
1742 return sprintf(page, "%s\n", on_restart_trigger.action->name);
1743 }
1744
on_restart_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)1745 static ssize_t on_restart_store(struct kobject *kobj,
1746 struct kobj_attribute *attr,
1747 const char *buf, size_t len)
1748 {
1749 return set_trigger(buf, &on_restart_trigger, len);
1750 }
1751 static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart);
1752
__do_restart(void * ignore)1753 static void __do_restart(void *ignore)
1754 {
1755 __arch_local_irq_stosm(0x04); /* enable DAT */
1756 smp_send_stop();
1757 #ifdef CONFIG_CRASH_DUMP
1758 crash_kexec(NULL);
1759 #endif
1760 on_restart_trigger.action->fn(&on_restart_trigger);
1761 stop_run(&on_restart_trigger);
1762 }
1763
do_restart(void)1764 void do_restart(void)
1765 {
1766 tracing_off();
1767 debug_locks_off();
1768 lgr_info_log();
1769 smp_call_online_cpu(__do_restart, NULL);
1770 }
1771
1772 /* on halt */
1773
1774 static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
1775
on_halt_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)1776 static ssize_t on_halt_show(struct kobject *kobj,
1777 struct kobj_attribute *attr, char *page)
1778 {
1779 return sprintf(page, "%s\n", on_halt_trigger.action->name);
1780 }
1781
on_halt_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)1782 static ssize_t on_halt_store(struct kobject *kobj,
1783 struct kobj_attribute *attr,
1784 const char *buf, size_t len)
1785 {
1786 return set_trigger(buf, &on_halt_trigger, len);
1787 }
1788 static struct kobj_attribute on_halt_attr = __ATTR_RW(on_halt);
1789
do_machine_halt(void)1790 static void do_machine_halt(void)
1791 {
1792 smp_send_stop();
1793 on_halt_trigger.action->fn(&on_halt_trigger);
1794 stop_run(&on_halt_trigger);
1795 }
1796 void (*_machine_halt)(void) = do_machine_halt;
1797
1798 /* on power off */
1799
1800 static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
1801
on_poff_show(struct kobject * kobj,struct kobj_attribute * attr,char * page)1802 static ssize_t on_poff_show(struct kobject *kobj,
1803 struct kobj_attribute *attr, char *page)
1804 {
1805 return sprintf(page, "%s\n", on_poff_trigger.action->name);
1806 }
1807
on_poff_store(struct kobject * kobj,struct kobj_attribute * attr,const char * buf,size_t len)1808 static ssize_t on_poff_store(struct kobject *kobj,
1809 struct kobj_attribute *attr,
1810 const char *buf, size_t len)
1811 {
1812 return set_trigger(buf, &on_poff_trigger, len);
1813 }
1814 static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff);
1815
do_machine_power_off(void)1816 static void do_machine_power_off(void)
1817 {
1818 smp_send_stop();
1819 on_poff_trigger.action->fn(&on_poff_trigger);
1820 stop_run(&on_poff_trigger);
1821 }
1822 void (*_machine_power_off)(void) = do_machine_power_off;
1823
1824 static struct attribute *shutdown_action_attrs[] = {
1825 &on_restart_attr.attr,
1826 &on_reboot_attr.attr,
1827 &on_panic_attr.attr,
1828 &on_halt_attr.attr,
1829 &on_poff_attr.attr,
1830 NULL,
1831 };
1832
1833 static struct attribute_group shutdown_action_attr_group = {
1834 .attrs = shutdown_action_attrs,
1835 };
1836
shutdown_triggers_init(void)1837 static void __init shutdown_triggers_init(void)
1838 {
1839 shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1840 firmware_kobj);
1841 if (!shutdown_actions_kset)
1842 goto fail;
1843 if (sysfs_create_group(&shutdown_actions_kset->kobj,
1844 &shutdown_action_attr_group))
1845 goto fail;
1846 return;
1847 fail:
1848 panic("shutdown_triggers_init failed\n");
1849 }
1850
shutdown_actions_init(void)1851 static void __init shutdown_actions_init(void)
1852 {
1853 int i;
1854
1855 for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
1856 if (!shutdown_actions_list[i]->init)
1857 continue;
1858 shutdown_actions_list[i]->init_rc =
1859 shutdown_actions_list[i]->init();
1860 }
1861 }
1862
s390_ipl_init(void)1863 static int __init s390_ipl_init(void)
1864 {
1865 char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40};
1866
1867 sclp_early_get_ipl_info(&sclp_ipl_info);
1868 /*
1869 * Fix loadparm: There are systems where the (SCSI) LOADPARM
1870 * returned by read SCP info is invalid (contains EBCDIC blanks)
1871 * when the system has been booted via diag308. In that case we use
1872 * the value from diag308, if available.
1873 *
1874 * There are also systems where diag308 store does not work in
1875 * case the system is booted from HMC. Fortunately in this case
1876 * READ SCP info provides the correct value.
1877 */
1878 if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 &&
1879 diag308_set_works)
1880 memcpy(sclp_ipl_info.loadparm, ipl_block.hdr.loadparm,
1881 LOADPARM_LEN);
1882 shutdown_actions_init();
1883 shutdown_triggers_init();
1884 return 0;
1885 }
1886
1887 __initcall(s390_ipl_init);
1888
strncpy_skip_quote(char * dst,char * src,int n)1889 static void __init strncpy_skip_quote(char *dst, char *src, int n)
1890 {
1891 int sx, dx;
1892
1893 dx = 0;
1894 for (sx = 0; src[sx] != 0; sx++) {
1895 if (src[sx] == '"')
1896 continue;
1897 dst[dx++] = src[sx];
1898 if (dx >= n)
1899 break;
1900 }
1901 }
1902
vmcmd_on_reboot_setup(char * str)1903 static int __init vmcmd_on_reboot_setup(char *str)
1904 {
1905 if (!MACHINE_IS_VM)
1906 return 1;
1907 strncpy_skip_quote(vmcmd_on_reboot, str, 127);
1908 vmcmd_on_reboot[127] = 0;
1909 on_reboot_trigger.action = &vmcmd_action;
1910 return 1;
1911 }
1912 __setup("vmreboot=", vmcmd_on_reboot_setup);
1913
vmcmd_on_panic_setup(char * str)1914 static int __init vmcmd_on_panic_setup(char *str)
1915 {
1916 if (!MACHINE_IS_VM)
1917 return 1;
1918 strncpy_skip_quote(vmcmd_on_panic, str, 127);
1919 vmcmd_on_panic[127] = 0;
1920 on_panic_trigger.action = &vmcmd_action;
1921 return 1;
1922 }
1923 __setup("vmpanic=", vmcmd_on_panic_setup);
1924
vmcmd_on_halt_setup(char * str)1925 static int __init vmcmd_on_halt_setup(char *str)
1926 {
1927 if (!MACHINE_IS_VM)
1928 return 1;
1929 strncpy_skip_quote(vmcmd_on_halt, str, 127);
1930 vmcmd_on_halt[127] = 0;
1931 on_halt_trigger.action = &vmcmd_action;
1932 return 1;
1933 }
1934 __setup("vmhalt=", vmcmd_on_halt_setup);
1935
vmcmd_on_poff_setup(char * str)1936 static int __init vmcmd_on_poff_setup(char *str)
1937 {
1938 if (!MACHINE_IS_VM)
1939 return 1;
1940 strncpy_skip_quote(vmcmd_on_poff, str, 127);
1941 vmcmd_on_poff[127] = 0;
1942 on_poff_trigger.action = &vmcmd_action;
1943 return 1;
1944 }
1945 __setup("vmpoff=", vmcmd_on_poff_setup);
1946
on_panic_notify(struct notifier_block * self,unsigned long event,void * data)1947 static int on_panic_notify(struct notifier_block *self,
1948 unsigned long event, void *data)
1949 {
1950 do_panic();
1951 return NOTIFY_OK;
1952 }
1953
1954 static struct notifier_block on_panic_nb = {
1955 .notifier_call = on_panic_notify,
1956 .priority = INT_MIN,
1957 };
1958
setup_ipl(void)1959 void __init setup_ipl(void)
1960 {
1961 ipl_info.type = get_ipl_type();
1962 switch (ipl_info.type) {
1963 case IPL_TYPE_CCW:
1964 ipl_info.data.ccw.dev_id.ssid = ipl_ssid;
1965 ipl_info.data.ccw.dev_id.devno = ipl_devno;
1966 break;
1967 case IPL_TYPE_FCP:
1968 case IPL_TYPE_FCP_DUMP:
1969 ipl_info.data.fcp.dev_id.ssid = 0;
1970 ipl_info.data.fcp.dev_id.devno =
1971 IPL_PARMBLOCK_START->ipl_info.fcp.devno;
1972 ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
1973 ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
1974 break;
1975 case IPL_TYPE_NSS:
1976 strncpy(ipl_info.data.nss.name, kernel_nss_name,
1977 sizeof(ipl_info.data.nss.name));
1978 break;
1979 case IPL_TYPE_UNKNOWN:
1980 /* We have no info to copy */
1981 break;
1982 }
1983 atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
1984 }
1985
ipl_update_parameters(void)1986 void __init ipl_update_parameters(void)
1987 {
1988 int rc;
1989
1990 rc = diag308(DIAG308_STORE, &ipl_block);
1991 if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
1992 diag308_set_works = 1;
1993 }
1994
ipl_verify_parameters(void)1995 void __init ipl_verify_parameters(void)
1996 {
1997 struct cio_iplinfo iplinfo;
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 }
2009
2010 static LIST_HEAD(rcall);
2011 static DEFINE_MUTEX(rcall_mutex);
2012
register_reset_call(struct reset_call * reset)2013 void register_reset_call(struct reset_call *reset)
2014 {
2015 mutex_lock(&rcall_mutex);
2016 list_add(&reset->list, &rcall);
2017 mutex_unlock(&rcall_mutex);
2018 }
2019 EXPORT_SYMBOL_GPL(register_reset_call);
2020
unregister_reset_call(struct reset_call * reset)2021 void unregister_reset_call(struct reset_call *reset)
2022 {
2023 mutex_lock(&rcall_mutex);
2024 list_del(&reset->list);
2025 mutex_unlock(&rcall_mutex);
2026 }
2027 EXPORT_SYMBOL_GPL(unregister_reset_call);
2028
do_reset_calls(void)2029 static void do_reset_calls(void)
2030 {
2031 struct reset_call *reset;
2032
2033 if (diag308_set_works) {
2034 diag308_reset();
2035 return;
2036 }
2037 list_for_each_entry(reset, &rcall, list)
2038 reset->fn();
2039 }
2040
s390_reset_system(void)2041 void s390_reset_system(void)
2042 {
2043 struct lowcore *lc;
2044
2045 lc = (struct lowcore *)(unsigned long) store_prefix();
2046
2047 /* Stack for interrupt/machine check handler */
2048 lc->panic_stack = S390_lowcore.panic_stack;
2049
2050 /* Disable prefixing */
2051 set_prefix(0);
2052
2053 /* Disable lowcore protection */
2054 __ctl_clear_bit(0,28);
2055
2056 /* Set new machine check handler */
2057 S390_lowcore.mcck_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
2058 S390_lowcore.mcck_new_psw.addr =
2059 (unsigned long) s390_base_mcck_handler;
2060
2061 /* Set new program check handler */
2062 S390_lowcore.program_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
2063 S390_lowcore.program_new_psw.addr =
2064 (unsigned long) s390_base_pgm_handler;
2065
2066 do_reset_calls();
2067 }
2068