Commit | Line | Data |
---|---|---|
ff6b8ea6 MH |
1 | /* |
2 | * arch/s390/kernel/ipl.c | |
3 | * ipl/reipl/dump support for Linux on s390. | |
4 | * | |
99ca4e58 | 5 | * Copyright IBM Corp. 2005,2007 |
ff6b8ea6 MH |
6 | * Author(s): Michael Holzheu <holzheu@de.ibm.com> |
7 | * Heiko Carstens <heiko.carstens@de.ibm.com> | |
8 | * Volker Sameske <sameske@de.ibm.com> | |
9 | */ | |
10 | ||
11 | #include <linux/types.h> | |
12 | #include <linux/module.h> | |
13 | #include <linux/device.h> | |
14 | #include <linux/delay.h> | |
15 | #include <linux/reboot.h> | |
03a4d208 | 16 | #include <linux/ctype.h> |
46b05d26 | 17 | #include <asm/ipl.h> |
ff6b8ea6 MH |
18 | #include <asm/smp.h> |
19 | #include <asm/setup.h> | |
20 | #include <asm/cpcmd.h> | |
21 | #include <asm/cio.h> | |
03a4d208 | 22 | #include <asm/ebcdic.h> |
15e9b586 | 23 | #include <asm/reset.h> |
ab14de6c | 24 | #include <asm/sclp.h> |
ff6b8ea6 MH |
25 | |
26 | #define IPL_PARM_BLOCK_VERSION 0 | |
03a4d208 | 27 | |
411ed322 MH |
28 | #define IPL_UNKNOWN_STR "unknown" |
29 | #define IPL_CCW_STR "ccw" | |
30 | #define IPL_FCP_STR "fcp" | |
31 | #define IPL_FCP_DUMP_STR "fcp_dump" | |
32 | #define IPL_NSS_STR "nss" | |
615b04b3 | 33 | |
99ca4e58 MH |
34 | #define DUMP_CCW_STR "ccw" |
35 | #define DUMP_FCP_STR "fcp" | |
36 | #define DUMP_NONE_STR "none" | |
37 | ||
38 | /* | |
39 | * Four shutdown trigger types are supported: | |
40 | * - panic | |
41 | * - halt | |
42 | * - power off | |
43 | * - reipl | |
44 | */ | |
45 | #define ON_PANIC_STR "on_panic" | |
46 | #define ON_HALT_STR "on_halt" | |
47 | #define ON_POFF_STR "on_poff" | |
48 | #define ON_REIPL_STR "on_reboot" | |
49 | ||
50 | struct shutdown_action; | |
51 | struct shutdown_trigger { | |
52 | char *name; | |
53 | struct shutdown_action *action; | |
54 | }; | |
55 | ||
56 | /* | |
57 | * Five shutdown action types are supported: | |
58 | */ | |
59 | #define SHUTDOWN_ACTION_IPL_STR "ipl" | |
60 | #define SHUTDOWN_ACTION_REIPL_STR "reipl" | |
61 | #define SHUTDOWN_ACTION_DUMP_STR "dump" | |
62 | #define SHUTDOWN_ACTION_VMCMD_STR "vmcmd" | |
63 | #define SHUTDOWN_ACTION_STOP_STR "stop" | |
64 | ||
65 | struct shutdown_action { | |
66 | char *name; | |
67 | void (*fn) (struct shutdown_trigger *trigger); | |
68 | int (*init) (void); | |
69 | }; | |
70 | ||
ff6b8ea6 MH |
71 | static char *ipl_type_str(enum ipl_type type) |
72 | { | |
73 | switch (type) { | |
ff6b8ea6 MH |
74 | case IPL_TYPE_CCW: |
75 | return IPL_CCW_STR; | |
76 | case IPL_TYPE_FCP: | |
77 | return IPL_FCP_STR; | |
411ed322 MH |
78 | case IPL_TYPE_FCP_DUMP: |
79 | return IPL_FCP_DUMP_STR; | |
fe355b7f HY |
80 | case IPL_TYPE_NSS: |
81 | return IPL_NSS_STR; | |
ff6b8ea6 MH |
82 | case IPL_TYPE_UNKNOWN: |
83 | default: | |
84 | return IPL_UNKNOWN_STR; | |
85 | } | |
86 | } | |
87 | ||
411ed322 MH |
88 | enum dump_type { |
89 | DUMP_TYPE_NONE = 1, | |
90 | DUMP_TYPE_CCW = 2, | |
91 | DUMP_TYPE_FCP = 4, | |
92 | }; | |
93 | ||
411ed322 MH |
94 | static char *dump_type_str(enum dump_type type) |
95 | { | |
96 | switch (type) { | |
97 | case DUMP_TYPE_NONE: | |
98 | return DUMP_NONE_STR; | |
99 | case DUMP_TYPE_CCW: | |
100 | return DUMP_CCW_STR; | |
101 | case DUMP_TYPE_FCP: | |
102 | return DUMP_FCP_STR; | |
103 | default: | |
104 | return NULL; | |
105 | } | |
106 | } | |
107 | ||
108 | /* | |
109 | * Must be in data section since the bss section | |
110 | * is not cleared when these are accessed. | |
111 | */ | |
112 | static u16 ipl_devno __attribute__((__section__(".data"))) = 0; | |
113 | u32 ipl_flags __attribute__((__section__(".data"))) = 0; | |
114 | ||
ff6b8ea6 | 115 | enum ipl_method { |
411ed322 MH |
116 | REIPL_METHOD_CCW_CIO, |
117 | REIPL_METHOD_CCW_DIAG, | |
118 | REIPL_METHOD_CCW_VM, | |
119 | REIPL_METHOD_FCP_RO_DIAG, | |
120 | REIPL_METHOD_FCP_RW_DIAG, | |
121 | REIPL_METHOD_FCP_RO_VM, | |
122 | REIPL_METHOD_FCP_DUMP, | |
123 | REIPL_METHOD_NSS, | |
124 | REIPL_METHOD_DEFAULT, | |
125 | }; | |
126 | ||
127 | enum dump_method { | |
128 | DUMP_METHOD_NONE, | |
129 | DUMP_METHOD_CCW_CIO, | |
130 | DUMP_METHOD_CCW_DIAG, | |
131 | DUMP_METHOD_CCW_VM, | |
132 | DUMP_METHOD_FCP_DIAG, | |
ff6b8ea6 MH |
133 | }; |
134 | ||
ff6b8ea6 MH |
135 | static int diag308_set_works = 0; |
136 | ||
137 | static int reipl_capabilities = IPL_TYPE_UNKNOWN; | |
fe355b7f | 138 | |
ff6b8ea6 | 139 | static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN; |
411ed322 | 140 | static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT; |
ff6b8ea6 MH |
141 | static struct ipl_parameter_block *reipl_block_fcp; |
142 | static struct ipl_parameter_block *reipl_block_ccw; | |
143 | ||
fe355b7f HY |
144 | static char reipl_nss_name[NSS_NAME_SIZE + 1]; |
145 | ||
411ed322 MH |
146 | static int dump_capabilities = DUMP_TYPE_NONE; |
147 | static enum dump_type dump_type = DUMP_TYPE_NONE; | |
148 | static enum dump_method dump_method = DUMP_METHOD_NONE; | |
ff6b8ea6 MH |
149 | static struct ipl_parameter_block *dump_block_fcp; |
150 | static struct ipl_parameter_block *dump_block_ccw; | |
151 | ||
05dd2530 HC |
152 | static struct sclp_ipl_info sclp_ipl_info; |
153 | ||
46b05d26 | 154 | int diag308(unsigned long subcode, void *addr) |
ff6b8ea6 | 155 | { |
94c12cc7 | 156 | register unsigned long _addr asm("0") = (unsigned long) addr; |
ff6b8ea6 MH |
157 | register unsigned long _rc asm("1") = 0; |
158 | ||
94c12cc7 MS |
159 | asm volatile( |
160 | " diag %0,%2,0x308\n" | |
161 | "0:\n" | |
162 | EX_TABLE(0b,0b) | |
ff6b8ea6 | 163 | : "+d" (_addr), "+d" (_rc) |
94c12cc7 | 164 | : "d" (subcode) : "cc", "memory"); |
ff6b8ea6 MH |
165 | return _rc; |
166 | } | |
411ed322 | 167 | EXPORT_SYMBOL_GPL(diag308); |
ff6b8ea6 MH |
168 | |
169 | /* SYSFS */ | |
170 | ||
171 | #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \ | |
9b949165 GKH |
172 | static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \ |
173 | struct kobj_attribute *attr, \ | |
ff6b8ea6 MH |
174 | char *page) \ |
175 | { \ | |
176 | return sprintf(page, _format, _value); \ | |
177 | } \ | |
9b949165 | 178 | static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ |
ff6b8ea6 MH |
179 | __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL); |
180 | ||
181 | #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \ | |
9b949165 GKH |
182 | static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \ |
183 | struct kobj_attribute *attr, \ | |
ff6b8ea6 MH |
184 | char *page) \ |
185 | { \ | |
186 | return sprintf(page, _fmt_out, \ | |
187 | (unsigned long long) _value); \ | |
188 | } \ | |
9b949165 GKH |
189 | static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \ |
190 | struct kobj_attribute *attr, \ | |
ff6b8ea6 MH |
191 | const char *buf, size_t len) \ |
192 | { \ | |
193 | unsigned long long value; \ | |
194 | if (sscanf(buf, _fmt_in, &value) != 1) \ | |
195 | return -EINVAL; \ | |
196 | _value = value; \ | |
197 | return len; \ | |
198 | } \ | |
9b949165 | 199 | static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ |
ff6b8ea6 MH |
200 | __ATTR(_name,(S_IRUGO | S_IWUSR), \ |
201 | sys_##_prefix##_##_name##_show, \ | |
202 | sys_##_prefix##_##_name##_store); | |
203 | ||
fe355b7f | 204 | #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\ |
9b949165 GKH |
205 | static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \ |
206 | struct kobj_attribute *attr, \ | |
fe355b7f HY |
207 | char *page) \ |
208 | { \ | |
209 | return sprintf(page, _fmt_out, _value); \ | |
210 | } \ | |
9b949165 GKH |
211 | static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \ |
212 | struct kobj_attribute *attr, \ | |
fe355b7f HY |
213 | const char *buf, size_t len) \ |
214 | { \ | |
99ca4e58 MH |
215 | strncpy(_value, buf, sizeof(_value) - 1); \ |
216 | strstrip(_value); \ | |
fe355b7f HY |
217 | return len; \ |
218 | } \ | |
9b949165 | 219 | static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ |
fe355b7f HY |
220 | __ATTR(_name,(S_IRUGO | S_IWUSR), \ |
221 | sys_##_prefix##_##_name##_show, \ | |
222 | sys_##_prefix##_##_name##_store); | |
223 | ||
ff6b8ea6 MH |
224 | static void make_attrs_ro(struct attribute **attrs) |
225 | { | |
226 | while (*attrs) { | |
227 | (*attrs)->mode = S_IRUGO; | |
228 | attrs++; | |
229 | } | |
230 | } | |
231 | ||
232 | /* | |
233 | * ipl section | |
234 | */ | |
235 | ||
411ed322 | 236 | static __init enum ipl_type get_ipl_type(void) |
ff6b8ea6 MH |
237 | { |
238 | struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START; | |
239 | ||
fe355b7f HY |
240 | if (ipl_flags & IPL_NSS_VALID) |
241 | return IPL_TYPE_NSS; | |
e87bfe51 | 242 | if (!(ipl_flags & IPL_DEVNO_VALID)) |
ff6b8ea6 | 243 | return IPL_TYPE_UNKNOWN; |
e87bfe51 | 244 | if (!(ipl_flags & IPL_PARMBLOCK_VALID)) |
ff6b8ea6 MH |
245 | return IPL_TYPE_CCW; |
246 | if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION) | |
247 | return IPL_TYPE_UNKNOWN; | |
248 | if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP) | |
249 | return IPL_TYPE_UNKNOWN; | |
411ed322 MH |
250 | if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP) |
251 | return IPL_TYPE_FCP_DUMP; | |
ff6b8ea6 MH |
252 | return IPL_TYPE_FCP; |
253 | } | |
254 | ||
411ed322 MH |
255 | struct ipl_info ipl_info; |
256 | EXPORT_SYMBOL_GPL(ipl_info); | |
257 | ||
9b949165 GKH |
258 | static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr, |
259 | char *page) | |
ff6b8ea6 | 260 | { |
411ed322 | 261 | return sprintf(page, "%s\n", ipl_type_str(ipl_info.type)); |
ff6b8ea6 MH |
262 | } |
263 | ||
9b949165 | 264 | static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type); |
ff6b8ea6 | 265 | |
9b949165 GKH |
266 | static ssize_t sys_ipl_device_show(struct kobject *kobj, |
267 | struct kobj_attribute *attr, char *page) | |
ff6b8ea6 MH |
268 | { |
269 | struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START; | |
270 | ||
411ed322 | 271 | switch (ipl_info.type) { |
ff6b8ea6 MH |
272 | case IPL_TYPE_CCW: |
273 | return sprintf(page, "0.0.%04x\n", ipl_devno); | |
274 | case IPL_TYPE_FCP: | |
411ed322 | 275 | case IPL_TYPE_FCP_DUMP: |
ff6b8ea6 MH |
276 | return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno); |
277 | default: | |
278 | return 0; | |
279 | } | |
280 | } | |
281 | ||
9b949165 | 282 | static struct kobj_attribute sys_ipl_device_attr = |
ff6b8ea6 MH |
283 | __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL); |
284 | ||
05bd711e AV |
285 | static ssize_t ipl_parameter_read(struct kobject *kobj, struct bin_attribute *attr, |
286 | char *buf, loff_t off, size_t count) | |
ff6b8ea6 MH |
287 | { |
288 | unsigned int size = IPL_PARMBLOCK_SIZE; | |
289 | ||
290 | if (off > size) | |
291 | return 0; | |
292 | if (off + count > size) | |
293 | count = size - off; | |
294 | memcpy(buf, (void *)IPL_PARMBLOCK_START + off, count); | |
295 | return count; | |
296 | } | |
297 | ||
298 | static struct bin_attribute ipl_parameter_attr = { | |
299 | .attr = { | |
300 | .name = "binary_parameter", | |
301 | .mode = S_IRUGO, | |
ff6b8ea6 MH |
302 | }, |
303 | .size = PAGE_SIZE, | |
304 | .read = &ipl_parameter_read, | |
305 | }; | |
306 | ||
05bd711e AV |
307 | static ssize_t ipl_scp_data_read(struct kobject *kobj, struct bin_attribute *attr, |
308 | char *buf, loff_t off, size_t count) | |
ff6b8ea6 MH |
309 | { |
310 | unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len; | |
311 | void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data; | |
312 | ||
313 | if (off > size) | |
314 | return 0; | |
315 | if (off + count > size) | |
316 | count = size - off; | |
317 | memcpy(buf, scp_data + off, count); | |
318 | return count; | |
319 | } | |
320 | ||
321 | static struct bin_attribute ipl_scp_data_attr = { | |
322 | .attr = { | |
323 | .name = "scp_data", | |
324 | .mode = S_IRUGO, | |
ff6b8ea6 MH |
325 | }, |
326 | .size = PAGE_SIZE, | |
05bd711e | 327 | .read = ipl_scp_data_read, |
ff6b8ea6 MH |
328 | }; |
329 | ||
330 | /* FCP ipl device attributes */ | |
331 | ||
332 | DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long) | |
333 | IPL_PARMBLOCK_START->ipl_info.fcp.wwpn); | |
334 | DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long) | |
335 | IPL_PARMBLOCK_START->ipl_info.fcp.lun); | |
336 | DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long) | |
337 | IPL_PARMBLOCK_START->ipl_info.fcp.bootprog); | |
338 | DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long) | |
339 | IPL_PARMBLOCK_START->ipl_info.fcp.br_lba); | |
340 | ||
341 | static struct attribute *ipl_fcp_attrs[] = { | |
342 | &sys_ipl_type_attr.attr, | |
343 | &sys_ipl_device_attr.attr, | |
344 | &sys_ipl_fcp_wwpn_attr.attr, | |
345 | &sys_ipl_fcp_lun_attr.attr, | |
346 | &sys_ipl_fcp_bootprog_attr.attr, | |
347 | &sys_ipl_fcp_br_lba_attr.attr, | |
348 | NULL, | |
349 | }; | |
350 | ||
351 | static struct attribute_group ipl_fcp_attr_group = { | |
352 | .attrs = ipl_fcp_attrs, | |
353 | }; | |
354 | ||
355 | /* CCW ipl device attributes */ | |
356 | ||
9b949165 GKH |
357 | static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj, |
358 | struct kobj_attribute *attr, char *page) | |
03a4d208 MH |
359 | { |
360 | char loadparm[LOADPARM_LEN + 1] = {}; | |
361 | ||
05dd2530 | 362 | if (!sclp_ipl_info.is_valid) |
03a4d208 | 363 | return sprintf(page, "#unknown#\n"); |
05dd2530 | 364 | memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN); |
03a4d208 MH |
365 | EBCASC(loadparm, LOADPARM_LEN); |
366 | strstrip(loadparm); | |
367 | return sprintf(page, "%s\n", loadparm); | |
368 | } | |
369 | ||
9b949165 | 370 | static struct kobj_attribute sys_ipl_ccw_loadparm_attr = |
03a4d208 MH |
371 | __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL); |
372 | ||
ff6b8ea6 MH |
373 | static struct attribute *ipl_ccw_attrs[] = { |
374 | &sys_ipl_type_attr.attr, | |
375 | &sys_ipl_device_attr.attr, | |
03a4d208 | 376 | &sys_ipl_ccw_loadparm_attr.attr, |
ff6b8ea6 MH |
377 | NULL, |
378 | }; | |
379 | ||
380 | static struct attribute_group ipl_ccw_attr_group = { | |
381 | .attrs = ipl_ccw_attrs, | |
382 | }; | |
383 | ||
fe355b7f HY |
384 | /* NSS ipl device attributes */ |
385 | ||
386 | DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name); | |
387 | ||
388 | static struct attribute *ipl_nss_attrs[] = { | |
389 | &sys_ipl_type_attr.attr, | |
390 | &sys_ipl_nss_name_attr.attr, | |
391 | NULL, | |
392 | }; | |
393 | ||
394 | static struct attribute_group ipl_nss_attr_group = { | |
395 | .attrs = ipl_nss_attrs, | |
396 | }; | |
397 | ||
ff6b8ea6 MH |
398 | /* UNKNOWN ipl device attributes */ |
399 | ||
400 | static struct attribute *ipl_unknown_attrs[] = { | |
401 | &sys_ipl_type_attr.attr, | |
402 | NULL, | |
403 | }; | |
404 | ||
405 | static struct attribute_group ipl_unknown_attr_group = { | |
406 | .attrs = ipl_unknown_attrs, | |
407 | }; | |
408 | ||
d91885be | 409 | static struct kset *ipl_kset; |
ff6b8ea6 | 410 | |
99ca4e58 MH |
411 | static int __init ipl_register_fcp_files(void) |
412 | { | |
413 | int rc; | |
414 | ||
415 | rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group); | |
416 | if (rc) | |
417 | goto out; | |
418 | rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_parameter_attr); | |
419 | if (rc) | |
420 | goto out_ipl_parm; | |
421 | rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_scp_data_attr); | |
422 | if (!rc) | |
423 | goto out; | |
424 | ||
425 | sysfs_remove_bin_file(&ipl_kset->kobj, &ipl_parameter_attr); | |
426 | ||
427 | out_ipl_parm: | |
428 | sysfs_remove_group(&ipl_kset->kobj, &ipl_fcp_attr_group); | |
429 | out: | |
430 | return rc; | |
431 | } | |
432 | ||
433 | static void ipl_run(struct shutdown_trigger *trigger) | |
434 | { | |
435 | diag308(DIAG308_IPL, NULL); | |
436 | if (MACHINE_IS_VM) | |
437 | __cpcmd("IPL", NULL, 0, NULL); | |
438 | else if (ipl_info.type == IPL_TYPE_CCW) | |
439 | reipl_ccw_dev(&ipl_info.data.ccw.dev_id); | |
440 | } | |
441 | ||
2bc89b5e | 442 | static int __init ipl_init(void) |
99ca4e58 MH |
443 | { |
444 | int rc; | |
445 | ||
446 | ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj); | |
447 | if (!ipl_kset) { | |
448 | rc = -ENOMEM; | |
449 | goto out; | |
450 | } | |
451 | switch (ipl_info.type) { | |
452 | case IPL_TYPE_CCW: | |
453 | rc = sysfs_create_group(&ipl_kset->kobj, &ipl_ccw_attr_group); | |
454 | break; | |
455 | case IPL_TYPE_FCP: | |
456 | case IPL_TYPE_FCP_DUMP: | |
457 | rc = ipl_register_fcp_files(); | |
458 | break; | |
459 | case IPL_TYPE_NSS: | |
460 | rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group); | |
461 | break; | |
462 | default: | |
463 | rc = sysfs_create_group(&ipl_kset->kobj, | |
464 | &ipl_unknown_attr_group); | |
465 | break; | |
466 | } | |
467 | out: | |
468 | if (rc) | |
469 | panic("ipl_init failed: rc = %i\n", rc); | |
470 | ||
471 | return 0; | |
472 | } | |
473 | ||
2bc89b5e HC |
474 | static struct shutdown_action __refdata ipl_action = { |
475 | .name = SHUTDOWN_ACTION_IPL_STR, | |
476 | .fn = ipl_run, | |
477 | .init = ipl_init, | |
478 | }; | |
99ca4e58 | 479 | |
ff6b8ea6 | 480 | /* |
99ca4e58 | 481 | * reipl shutdown action: Reboot Linux on shutdown. |
ff6b8ea6 MH |
482 | */ |
483 | ||
484 | /* FCP reipl device attributes */ | |
485 | ||
486 | DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n", | |
487 | reipl_block_fcp->ipl_info.fcp.wwpn); | |
488 | DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n", | |
489 | reipl_block_fcp->ipl_info.fcp.lun); | |
490 | DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n", | |
491 | reipl_block_fcp->ipl_info.fcp.bootprog); | |
492 | DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n", | |
493 | reipl_block_fcp->ipl_info.fcp.br_lba); | |
494 | DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n", | |
495 | reipl_block_fcp->ipl_info.fcp.devno); | |
496 | ||
497 | static struct attribute *reipl_fcp_attrs[] = { | |
498 | &sys_reipl_fcp_device_attr.attr, | |
499 | &sys_reipl_fcp_wwpn_attr.attr, | |
500 | &sys_reipl_fcp_lun_attr.attr, | |
501 | &sys_reipl_fcp_bootprog_attr.attr, | |
502 | &sys_reipl_fcp_br_lba_attr.attr, | |
503 | NULL, | |
504 | }; | |
505 | ||
506 | static struct attribute_group reipl_fcp_attr_group = { | |
507 | .name = IPL_FCP_STR, | |
508 | .attrs = reipl_fcp_attrs, | |
509 | }; | |
510 | ||
511 | /* CCW reipl device attributes */ | |
512 | ||
513 | DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n", | |
514 | reipl_block_ccw->ipl_info.ccw.devno); | |
515 | ||
03a4d208 MH |
516 | static void reipl_get_ascii_loadparm(char *loadparm) |
517 | { | |
518 | memcpy(loadparm, &reipl_block_ccw->ipl_info.ccw.load_param, | |
519 | LOADPARM_LEN); | |
520 | EBCASC(loadparm, LOADPARM_LEN); | |
521 | loadparm[LOADPARM_LEN] = 0; | |
522 | strstrip(loadparm); | |
523 | } | |
524 | ||
9b949165 GKH |
525 | static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj, |
526 | struct kobj_attribute *attr, char *page) | |
03a4d208 MH |
527 | { |
528 | char buf[LOADPARM_LEN + 1]; | |
529 | ||
530 | reipl_get_ascii_loadparm(buf); | |
531 | return sprintf(page, "%s\n", buf); | |
532 | } | |
533 | ||
9b949165 GKH |
534 | static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj, |
535 | struct kobj_attribute *attr, | |
03a4d208 MH |
536 | const char *buf, size_t len) |
537 | { | |
538 | int i, lp_len; | |
539 | ||
540 | /* ignore trailing newline */ | |
541 | lp_len = len; | |
542 | if ((len > 0) && (buf[len - 1] == '\n')) | |
543 | lp_len--; | |
544 | /* loadparm can have max 8 characters and must not start with a blank */ | |
545 | if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' '))) | |
546 | return -EINVAL; | |
547 | /* loadparm can only contain "a-z,A-Z,0-9,SP,." */ | |
548 | for (i = 0; i < lp_len; i++) { | |
549 | if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') || | |
550 | (buf[i] == '.')) | |
551 | continue; | |
552 | return -EINVAL; | |
553 | } | |
554 | /* initialize loadparm with blanks */ | |
555 | memset(&reipl_block_ccw->ipl_info.ccw.load_param, ' ', LOADPARM_LEN); | |
556 | /* copy and convert to ebcdic */ | |
557 | memcpy(&reipl_block_ccw->ipl_info.ccw.load_param, buf, lp_len); | |
558 | ASCEBC(reipl_block_ccw->ipl_info.ccw.load_param, LOADPARM_LEN); | |
559 | return len; | |
560 | } | |
561 | ||
9b949165 | 562 | static struct kobj_attribute sys_reipl_ccw_loadparm_attr = |
03a4d208 MH |
563 | __ATTR(loadparm, 0644, reipl_ccw_loadparm_show, |
564 | reipl_ccw_loadparm_store); | |
565 | ||
ff6b8ea6 MH |
566 | static struct attribute *reipl_ccw_attrs[] = { |
567 | &sys_reipl_ccw_device_attr.attr, | |
03a4d208 | 568 | &sys_reipl_ccw_loadparm_attr.attr, |
ff6b8ea6 MH |
569 | NULL, |
570 | }; | |
571 | ||
572 | static struct attribute_group reipl_ccw_attr_group = { | |
573 | .name = IPL_CCW_STR, | |
574 | .attrs = reipl_ccw_attrs, | |
575 | }; | |
576 | ||
fe355b7f HY |
577 | |
578 | /* NSS reipl device attributes */ | |
579 | ||
580 | DEFINE_IPL_ATTR_STR_RW(reipl_nss, name, "%s\n", "%s\n", reipl_nss_name); | |
581 | ||
582 | static struct attribute *reipl_nss_attrs[] = { | |
583 | &sys_reipl_nss_name_attr.attr, | |
584 | NULL, | |
585 | }; | |
586 | ||
587 | static struct attribute_group reipl_nss_attr_group = { | |
588 | .name = IPL_NSS_STR, | |
589 | .attrs = reipl_nss_attrs, | |
590 | }; | |
591 | ||
ff6b8ea6 MH |
592 | /* reipl type */ |
593 | ||
594 | static int reipl_set_type(enum ipl_type type) | |
595 | { | |
596 | if (!(reipl_capabilities & type)) | |
597 | return -EINVAL; | |
598 | ||
599 | switch(type) { | |
600 | case IPL_TYPE_CCW: | |
48657d22 MH |
601 | if (diag308_set_works) |
602 | reipl_method = REIPL_METHOD_CCW_DIAG; | |
603 | else if (MACHINE_IS_VM) | |
411ed322 | 604 | reipl_method = REIPL_METHOD_CCW_VM; |
ff6b8ea6 | 605 | else |
411ed322 | 606 | reipl_method = REIPL_METHOD_CCW_CIO; |
ff6b8ea6 MH |
607 | break; |
608 | case IPL_TYPE_FCP: | |
609 | if (diag308_set_works) | |
411ed322 | 610 | reipl_method = REIPL_METHOD_FCP_RW_DIAG; |
ff6b8ea6 | 611 | else if (MACHINE_IS_VM) |
411ed322 | 612 | reipl_method = REIPL_METHOD_FCP_RO_VM; |
ff6b8ea6 | 613 | else |
411ed322 MH |
614 | reipl_method = REIPL_METHOD_FCP_RO_DIAG; |
615 | break; | |
616 | case IPL_TYPE_FCP_DUMP: | |
617 | reipl_method = REIPL_METHOD_FCP_DUMP; | |
ff6b8ea6 | 618 | break; |
fe355b7f | 619 | case IPL_TYPE_NSS: |
411ed322 MH |
620 | reipl_method = REIPL_METHOD_NSS; |
621 | break; | |
622 | case IPL_TYPE_UNKNOWN: | |
623 | reipl_method = REIPL_METHOD_DEFAULT; | |
fe355b7f | 624 | break; |
ff6b8ea6 | 625 | default: |
411ed322 | 626 | BUG(); |
ff6b8ea6 MH |
627 | } |
628 | reipl_type = type; | |
629 | return 0; | |
630 | } | |
631 | ||
9b949165 GKH |
632 | static ssize_t reipl_type_show(struct kobject *kobj, |
633 | struct kobj_attribute *attr, char *page) | |
ff6b8ea6 MH |
634 | { |
635 | return sprintf(page, "%s\n", ipl_type_str(reipl_type)); | |
636 | } | |
637 | ||
9b949165 GKH |
638 | static ssize_t reipl_type_store(struct kobject *kobj, |
639 | struct kobj_attribute *attr, | |
640 | const char *buf, size_t len) | |
ff6b8ea6 MH |
641 | { |
642 | int rc = -EINVAL; | |
643 | ||
644 | if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0) | |
645 | rc = reipl_set_type(IPL_TYPE_CCW); | |
646 | else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0) | |
647 | rc = reipl_set_type(IPL_TYPE_FCP); | |
fe355b7f HY |
648 | else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0) |
649 | rc = reipl_set_type(IPL_TYPE_NSS); | |
ff6b8ea6 MH |
650 | return (rc != 0) ? rc : len; |
651 | } | |
652 | ||
9b949165 | 653 | static struct kobj_attribute reipl_type_attr = |
99ca4e58 | 654 | __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store); |
ff6b8ea6 | 655 | |
d91885be | 656 | static struct kset *reipl_kset; |
ff6b8ea6 | 657 | |
a806170e | 658 | static void reipl_run(struct shutdown_trigger *trigger) |
ff6b8ea6 MH |
659 | { |
660 | struct ccw_dev_id devid; | |
661 | static char buf[100]; | |
03a4d208 | 662 | char loadparm[LOADPARM_LEN + 1]; |
ff6b8ea6 | 663 | |
ff6b8ea6 | 664 | switch (reipl_method) { |
411ed322 | 665 | case REIPL_METHOD_CCW_CIO: |
ff6b8ea6 MH |
666 | devid.devno = reipl_block_ccw->ipl_info.ccw.devno; |
667 | devid.ssid = 0; | |
668 | reipl_ccw_dev(&devid); | |
669 | break; | |
411ed322 | 670 | case REIPL_METHOD_CCW_VM: |
58be9441 | 671 | reipl_get_ascii_loadparm(loadparm); |
03a4d208 | 672 | if (strlen(loadparm) == 0) |
6517156c | 673 | sprintf(buf, "IPL %X CLEAR", |
03a4d208 MH |
674 | reipl_block_ccw->ipl_info.ccw.devno); |
675 | else | |
6517156c | 676 | sprintf(buf, "IPL %X CLEAR LOADPARM '%s'", |
03a4d208 | 677 | reipl_block_ccw->ipl_info.ccw.devno, loadparm); |
740b5706 | 678 | __cpcmd(buf, NULL, 0, NULL); |
ff6b8ea6 | 679 | break; |
411ed322 | 680 | case REIPL_METHOD_CCW_DIAG: |
ff6b8ea6 MH |
681 | diag308(DIAG308_SET, reipl_block_ccw); |
682 | diag308(DIAG308_IPL, NULL); | |
683 | break; | |
411ed322 | 684 | case REIPL_METHOD_FCP_RW_DIAG: |
ff6b8ea6 MH |
685 | diag308(DIAG308_SET, reipl_block_fcp); |
686 | diag308(DIAG308_IPL, NULL); | |
687 | break; | |
411ed322 | 688 | case REIPL_METHOD_FCP_RO_DIAG: |
ff6b8ea6 MH |
689 | diag308(DIAG308_IPL, NULL); |
690 | break; | |
411ed322 | 691 | case REIPL_METHOD_FCP_RO_VM: |
740b5706 | 692 | __cpcmd("IPL", NULL, 0, NULL); |
ff6b8ea6 | 693 | break; |
411ed322 | 694 | case REIPL_METHOD_NSS: |
fe355b7f HY |
695 | sprintf(buf, "IPL %s", reipl_nss_name); |
696 | __cpcmd(buf, NULL, 0, NULL); | |
697 | break; | |
411ed322 | 698 | case REIPL_METHOD_DEFAULT: |
ff6b8ea6 | 699 | if (MACHINE_IS_VM) |
740b5706 | 700 | __cpcmd("IPL", NULL, 0, NULL); |
ff6b8ea6 MH |
701 | diag308(DIAG308_IPL, NULL); |
702 | break; | |
411ed322 MH |
703 | case REIPL_METHOD_FCP_DUMP: |
704 | default: | |
705 | break; | |
ff6b8ea6 | 706 | } |
208e5591 | 707 | disabled_wait((unsigned long) __builtin_return_address(0)); |
ff6b8ea6 MH |
708 | } |
709 | ||
99ca4e58 | 710 | static void __init reipl_probe(void) |
ff6b8ea6 | 711 | { |
99ca4e58 | 712 | void *buffer; |
ff6b8ea6 | 713 | |
99ca4e58 MH |
714 | buffer = (void *) get_zeroed_page(GFP_KERNEL); |
715 | if (!buffer) | |
ff6b8ea6 | 716 | return; |
99ca4e58 MH |
717 | if (diag308(DIAG308_STORE, buffer) == DIAG308_RC_OK) |
718 | diag308_set_works = 1; | |
719 | free_page((unsigned long)buffer); | |
ff6b8ea6 MH |
720 | } |
721 | ||
99ca4e58 | 722 | static int __init reipl_nss_init(void) |
ff6b8ea6 MH |
723 | { |
724 | int rc; | |
725 | ||
99ca4e58 MH |
726 | if (!MACHINE_IS_VM) |
727 | return 0; | |
728 | rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group); | |
fe355b7f HY |
729 | if (rc) |
730 | return rc; | |
731 | strncpy(reipl_nss_name, kernel_nss_name, NSS_NAME_SIZE + 1); | |
732 | reipl_capabilities |= IPL_TYPE_NSS; | |
733 | return 0; | |
734 | } | |
735 | ||
ff6b8ea6 MH |
736 | static int __init reipl_ccw_init(void) |
737 | { | |
738 | int rc; | |
739 | ||
740 | reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL); | |
741 | if (!reipl_block_ccw) | |
742 | return -ENOMEM; | |
d91885be | 743 | rc = sysfs_create_group(&reipl_kset->kobj, &reipl_ccw_attr_group); |
ff6b8ea6 MH |
744 | if (rc) { |
745 | free_page((unsigned long)reipl_block_ccw); | |
746 | return rc; | |
747 | } | |
748 | reipl_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN; | |
749 | reipl_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION; | |
fbb04f38 | 750 | reipl_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN; |
ff6b8ea6 | 751 | reipl_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW; |
48657d22 | 752 | reipl_block_ccw->hdr.flags = DIAG308_FLAGS_LP_VALID; |
03a4d208 | 753 | /* check if read scp info worked and set loadparm */ |
05dd2530 | 754 | if (sclp_ipl_info.is_valid) |
03a4d208 | 755 | memcpy(reipl_block_ccw->ipl_info.ccw.load_param, |
05dd2530 | 756 | &sclp_ipl_info.loadparm, LOADPARM_LEN); |
03a4d208 MH |
757 | else |
758 | /* read scp info failed: set empty loadparm (EBCDIC blanks) */ | |
759 | memset(reipl_block_ccw->ipl_info.ccw.load_param, 0x40, | |
760 | LOADPARM_LEN); | |
48657d22 | 761 | if (!MACHINE_IS_VM && !diag308_set_works) |
03a4d208 | 762 | sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO; |
411ed322 | 763 | if (ipl_info.type == IPL_TYPE_CCW) |
ff6b8ea6 MH |
764 | reipl_block_ccw->ipl_info.ccw.devno = ipl_devno; |
765 | reipl_capabilities |= IPL_TYPE_CCW; | |
766 | return 0; | |
767 | } | |
768 | ||
769 | static int __init reipl_fcp_init(void) | |
770 | { | |
771 | int rc; | |
772 | ||
411ed322 | 773 | if ((!diag308_set_works) && (ipl_info.type != IPL_TYPE_FCP)) |
ff6b8ea6 | 774 | return 0; |
411ed322 | 775 | if ((!diag308_set_works) && (ipl_info.type == IPL_TYPE_FCP)) |
ff6b8ea6 MH |
776 | make_attrs_ro(reipl_fcp_attrs); |
777 | ||
778 | reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL); | |
779 | if (!reipl_block_fcp) | |
780 | return -ENOMEM; | |
d91885be | 781 | rc = sysfs_create_group(&reipl_kset->kobj, &reipl_fcp_attr_group); |
ff6b8ea6 MH |
782 | if (rc) { |
783 | free_page((unsigned long)reipl_block_fcp); | |
784 | return rc; | |
785 | } | |
411ed322 | 786 | if (ipl_info.type == IPL_TYPE_FCP) { |
ff6b8ea6 MH |
787 | memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE); |
788 | } else { | |
789 | reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN; | |
790 | reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION; | |
fbb04f38 | 791 | reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN; |
ff6b8ea6 MH |
792 | reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP; |
793 | reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL; | |
794 | } | |
795 | reipl_capabilities |= IPL_TYPE_FCP; | |
796 | return 0; | |
797 | } | |
798 | ||
2bc89b5e | 799 | static int __init reipl_init(void) |
ff6b8ea6 MH |
800 | { |
801 | int rc; | |
802 | ||
f62ed9e3 | 803 | reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj); |
d91885be GKH |
804 | if (!reipl_kset) |
805 | return -ENOMEM; | |
806 | rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr); | |
ff6b8ea6 | 807 | if (rc) { |
d91885be | 808 | kset_unregister(reipl_kset); |
ff6b8ea6 MH |
809 | return rc; |
810 | } | |
811 | rc = reipl_ccw_init(); | |
812 | if (rc) | |
813 | return rc; | |
814 | rc = reipl_fcp_init(); | |
fe355b7f HY |
815 | if (rc) |
816 | return rc; | |
817 | rc = reipl_nss_init(); | |
ff6b8ea6 MH |
818 | if (rc) |
819 | return rc; | |
411ed322 | 820 | rc = reipl_set_type(ipl_info.type); |
ff6b8ea6 MH |
821 | if (rc) |
822 | return rc; | |
823 | return 0; | |
824 | } | |
825 | ||
2bc89b5e HC |
826 | static struct shutdown_action __refdata reipl_action = { |
827 | .name = SHUTDOWN_ACTION_REIPL_STR, | |
828 | .fn = reipl_run, | |
829 | .init = reipl_init, | |
830 | }; | |
99ca4e58 MH |
831 | |
832 | /* | |
833 | * dump shutdown action: Dump Linux on shutdown. | |
834 | */ | |
835 | ||
836 | /* FCP dump device attributes */ | |
837 | ||
838 | DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n", | |
839 | dump_block_fcp->ipl_info.fcp.wwpn); | |
840 | DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n", | |
841 | dump_block_fcp->ipl_info.fcp.lun); | |
842 | DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n", | |
843 | dump_block_fcp->ipl_info.fcp.bootprog); | |
844 | DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n", | |
845 | dump_block_fcp->ipl_info.fcp.br_lba); | |
846 | DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n", | |
847 | dump_block_fcp->ipl_info.fcp.devno); | |
848 | ||
849 | static struct attribute *dump_fcp_attrs[] = { | |
850 | &sys_dump_fcp_device_attr.attr, | |
851 | &sys_dump_fcp_wwpn_attr.attr, | |
852 | &sys_dump_fcp_lun_attr.attr, | |
853 | &sys_dump_fcp_bootprog_attr.attr, | |
854 | &sys_dump_fcp_br_lba_attr.attr, | |
855 | NULL, | |
856 | }; | |
857 | ||
858 | static struct attribute_group dump_fcp_attr_group = { | |
859 | .name = IPL_FCP_STR, | |
860 | .attrs = dump_fcp_attrs, | |
861 | }; | |
862 | ||
863 | /* CCW dump device attributes */ | |
864 | ||
865 | DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n", | |
866 | dump_block_ccw->ipl_info.ccw.devno); | |
867 | ||
868 | static struct attribute *dump_ccw_attrs[] = { | |
869 | &sys_dump_ccw_device_attr.attr, | |
870 | NULL, | |
871 | }; | |
872 | ||
873 | static struct attribute_group dump_ccw_attr_group = { | |
874 | .name = IPL_CCW_STR, | |
875 | .attrs = dump_ccw_attrs, | |
876 | }; | |
877 | ||
878 | /* dump type */ | |
879 | ||
880 | static int dump_set_type(enum dump_type type) | |
881 | { | |
882 | if (!(dump_capabilities & type)) | |
883 | return -EINVAL; | |
884 | switch (type) { | |
885 | case DUMP_TYPE_CCW: | |
48657d22 MH |
886 | if (diag308_set_works) |
887 | dump_method = DUMP_METHOD_CCW_DIAG; | |
888 | else if (MACHINE_IS_VM) | |
99ca4e58 MH |
889 | dump_method = DUMP_METHOD_CCW_VM; |
890 | else | |
891 | dump_method = DUMP_METHOD_CCW_CIO; | |
892 | break; | |
893 | case DUMP_TYPE_FCP: | |
894 | dump_method = DUMP_METHOD_FCP_DIAG; | |
895 | break; | |
896 | default: | |
897 | dump_method = DUMP_METHOD_NONE; | |
898 | } | |
899 | dump_type = type; | |
900 | return 0; | |
901 | } | |
902 | ||
903 | static ssize_t dump_type_show(struct kobject *kobj, | |
904 | struct kobj_attribute *attr, char *page) | |
905 | { | |
906 | return sprintf(page, "%s\n", dump_type_str(dump_type)); | |
907 | } | |
908 | ||
909 | static ssize_t dump_type_store(struct kobject *kobj, | |
910 | struct kobj_attribute *attr, | |
911 | const char *buf, size_t len) | |
912 | { | |
913 | int rc = -EINVAL; | |
914 | ||
915 | if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0) | |
916 | rc = dump_set_type(DUMP_TYPE_NONE); | |
917 | else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0) | |
918 | rc = dump_set_type(DUMP_TYPE_CCW); | |
919 | else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0) | |
920 | rc = dump_set_type(DUMP_TYPE_FCP); | |
921 | return (rc != 0) ? rc : len; | |
922 | } | |
923 | ||
924 | static struct kobj_attribute dump_type_attr = | |
925 | __ATTR(dump_type, 0644, dump_type_show, dump_type_store); | |
926 | ||
927 | static struct kset *dump_kset; | |
928 | ||
929 | static void dump_run(struct shutdown_trigger *trigger) | |
930 | { | |
931 | struct ccw_dev_id devid; | |
932 | static char buf[100]; | |
933 | ||
934 | switch (dump_method) { | |
935 | case DUMP_METHOD_CCW_CIO: | |
936 | smp_send_stop(); | |
937 | devid.devno = dump_block_ccw->ipl_info.ccw.devno; | |
938 | devid.ssid = 0; | |
939 | reipl_ccw_dev(&devid); | |
940 | break; | |
941 | case DUMP_METHOD_CCW_VM: | |
942 | smp_send_stop(); | |
943 | sprintf(buf, "STORE STATUS"); | |
944 | __cpcmd(buf, NULL, 0, NULL); | |
945 | sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno); | |
946 | __cpcmd(buf, NULL, 0, NULL); | |
947 | break; | |
948 | case DUMP_METHOD_CCW_DIAG: | |
949 | diag308(DIAG308_SET, dump_block_ccw); | |
950 | diag308(DIAG308_DUMP, NULL); | |
951 | break; | |
952 | case DUMP_METHOD_FCP_DIAG: | |
953 | diag308(DIAG308_SET, dump_block_fcp); | |
954 | diag308(DIAG308_DUMP, NULL); | |
955 | break; | |
956 | case DUMP_METHOD_NONE: | |
957 | default: | |
958 | return; | |
959 | } | |
960 | printk(KERN_EMERG "Dump failed!\n"); | |
961 | } | |
962 | ||
ff6b8ea6 MH |
963 | static int __init dump_ccw_init(void) |
964 | { | |
965 | int rc; | |
966 | ||
967 | dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL); | |
968 | if (!dump_block_ccw) | |
969 | return -ENOMEM; | |
d91885be | 970 | rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group); |
ff6b8ea6 MH |
971 | if (rc) { |
972 | free_page((unsigned long)dump_block_ccw); | |
973 | return rc; | |
974 | } | |
975 | dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN; | |
976 | dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION; | |
fbb04f38 | 977 | dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN; |
ff6b8ea6 | 978 | dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW; |
411ed322 | 979 | dump_capabilities |= DUMP_TYPE_CCW; |
ff6b8ea6 MH |
980 | return 0; |
981 | } | |
982 | ||
ff6b8ea6 MH |
983 | static int __init dump_fcp_init(void) |
984 | { | |
985 | int rc; | |
986 | ||
05dd2530 | 987 | if (!sclp_ipl_info.has_dump) |
ff6b8ea6 MH |
988 | return 0; /* LDIPL DUMP is not installed */ |
989 | if (!diag308_set_works) | |
990 | return 0; | |
991 | dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL); | |
992 | if (!dump_block_fcp) | |
993 | return -ENOMEM; | |
d91885be | 994 | rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group); |
ff6b8ea6 MH |
995 | if (rc) { |
996 | free_page((unsigned long)dump_block_fcp); | |
997 | return rc; | |
998 | } | |
999 | dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN; | |
1000 | dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION; | |
fbb04f38 | 1001 | dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN; |
ff6b8ea6 MH |
1002 | dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP; |
1003 | dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP; | |
411ed322 | 1004 | dump_capabilities |= DUMP_TYPE_FCP; |
ff6b8ea6 MH |
1005 | return 0; |
1006 | } | |
1007 | ||
2bc89b5e | 1008 | static int __init dump_init(void) |
ff6b8ea6 MH |
1009 | { |
1010 | int rc; | |
1011 | ||
f62ed9e3 | 1012 | dump_kset = kset_create_and_add("dump", NULL, firmware_kobj); |
d91885be GKH |
1013 | if (!dump_kset) |
1014 | return -ENOMEM; | |
99ca4e58 | 1015 | rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr); |
ff6b8ea6 | 1016 | if (rc) { |
d91885be | 1017 | kset_unregister(dump_kset); |
ff6b8ea6 MH |
1018 | return rc; |
1019 | } | |
1020 | rc = dump_ccw_init(); | |
1021 | if (rc) | |
1022 | return rc; | |
1023 | rc = dump_fcp_init(); | |
1024 | if (rc) | |
1025 | return rc; | |
411ed322 | 1026 | dump_set_type(DUMP_TYPE_NONE); |
ff6b8ea6 MH |
1027 | return 0; |
1028 | } | |
1029 | ||
2bc89b5e HC |
1030 | static struct shutdown_action __refdata dump_action = { |
1031 | .name = SHUTDOWN_ACTION_DUMP_STR, | |
1032 | .fn = dump_run, | |
1033 | .init = dump_init, | |
1034 | }; | |
99ca4e58 MH |
1035 | |
1036 | /* | |
1037 | * vmcmd shutdown action: Trigger vm command on shutdown. | |
1038 | */ | |
1039 | ||
1040 | static char vmcmd_on_reboot[128]; | |
1041 | static char vmcmd_on_panic[128]; | |
1042 | static char vmcmd_on_halt[128]; | |
1043 | static char vmcmd_on_poff[128]; | |
1044 | ||
1045 | DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot); | |
1046 | DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic); | |
1047 | DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt); | |
1048 | DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff); | |
1049 | ||
1050 | static struct attribute *vmcmd_attrs[] = { | |
1051 | &sys_vmcmd_on_reboot_attr.attr, | |
1052 | &sys_vmcmd_on_panic_attr.attr, | |
1053 | &sys_vmcmd_on_halt_attr.attr, | |
1054 | &sys_vmcmd_on_poff_attr.attr, | |
1055 | NULL, | |
1056 | }; | |
1057 | ||
1058 | static struct attribute_group vmcmd_attr_group = { | |
1059 | .attrs = vmcmd_attrs, | |
1060 | }; | |
1061 | ||
1062 | static struct kset *vmcmd_kset; | |
1063 | ||
1064 | static void vmcmd_run(struct shutdown_trigger *trigger) | |
ff6b8ea6 | 1065 | { |
99ca4e58 MH |
1066 | char *cmd, *next_cmd; |
1067 | ||
1068 | if (strcmp(trigger->name, ON_REIPL_STR) == 0) | |
1069 | cmd = vmcmd_on_reboot; | |
1070 | else if (strcmp(trigger->name, ON_PANIC_STR) == 0) | |
1071 | cmd = vmcmd_on_panic; | |
1072 | else if (strcmp(trigger->name, ON_HALT_STR) == 0) | |
1073 | cmd = vmcmd_on_halt; | |
1074 | else if (strcmp(trigger->name, ON_POFF_STR) == 0) | |
1075 | cmd = vmcmd_on_poff; | |
1076 | else | |
1077 | return; | |
1078 | ||
1079 | if (strlen(cmd) == 0) | |
1080 | return; | |
1081 | do { | |
1082 | next_cmd = strchr(cmd, '\n'); | |
1083 | if (next_cmd) { | |
1084 | next_cmd[0] = 0; | |
1085 | next_cmd += 1; | |
1086 | } | |
1087 | __cpcmd(cmd, NULL, 0, NULL); | |
1088 | cmd = next_cmd; | |
1089 | } while (cmd != NULL); | |
1090 | } | |
1091 | ||
1092 | static int vmcmd_init(void) | |
1093 | { | |
1094 | if (!MACHINE_IS_VM) | |
1095 | return -ENOTSUPP; | |
1096 | vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj); | |
1097 | if (!vmcmd_kset) | |
1098 | return -ENOMEM; | |
1099 | return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group); | |
1100 | } | |
1101 | ||
1102 | static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR, | |
1103 | vmcmd_run, vmcmd_init}; | |
1104 | ||
1105 | /* | |
1106 | * stop shutdown action: Stop Linux on shutdown. | |
1107 | */ | |
1108 | ||
1109 | static void stop_run(struct shutdown_trigger *trigger) | |
1110 | { | |
c6547497 MH |
1111 | if (strcmp(trigger->name, ON_PANIC_STR) == 0) |
1112 | disabled_wait((unsigned long) __builtin_return_address(0)); | |
1113 | else { | |
1114 | signal_processor(smp_processor_id(), sigp_stop); | |
1115 | for (;;); | |
1116 | } | |
99ca4e58 MH |
1117 | } |
1118 | ||
1119 | static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR, | |
1120 | stop_run, NULL}; | |
1121 | ||
1122 | /* action list */ | |
1123 | ||
1124 | static struct shutdown_action *shutdown_actions_list[] = { | |
1125 | &ipl_action, &reipl_action, &dump_action, &vmcmd_action, &stop_action}; | |
1126 | #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *)) | |
1127 | ||
1128 | /* | |
1129 | * Trigger section | |
1130 | */ | |
1131 | ||
1132 | static struct kset *shutdown_actions_kset; | |
1133 | ||
1134 | static int set_trigger(const char *buf, struct shutdown_trigger *trigger, | |
1135 | size_t len) | |
1136 | { | |
1137 | int i; | |
1138 | for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) { | |
1139 | if (!shutdown_actions_list[i]) | |
1140 | continue; | |
1141 | if (strncmp(buf, shutdown_actions_list[i]->name, | |
1142 | strlen(shutdown_actions_list[i]->name)) == 0) { | |
1143 | trigger->action = shutdown_actions_list[i]; | |
1144 | return len; | |
1145 | } | |
1146 | } | |
1147 | return -EINVAL; | |
1148 | } | |
1149 | ||
1150 | /* on reipl */ | |
1151 | ||
1152 | static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR, | |
1153 | &reipl_action}; | |
1154 | ||
1155 | static ssize_t on_reboot_show(struct kobject *kobj, | |
1156 | struct kobj_attribute *attr, char *page) | |
1157 | { | |
1158 | return sprintf(page, "%s\n", on_reboot_trigger.action->name); | |
1159 | } | |
1160 | ||
1161 | static ssize_t on_reboot_store(struct kobject *kobj, | |
1162 | struct kobj_attribute *attr, | |
1163 | const char *buf, size_t len) | |
1164 | { | |
1165 | return set_trigger(buf, &on_reboot_trigger, len); | |
1166 | } | |
1167 | ||
1168 | static struct kobj_attribute on_reboot_attr = | |
1169 | __ATTR(on_reboot, 0644, on_reboot_show, on_reboot_store); | |
1170 | ||
1171 | static void do_machine_restart(char *__unused) | |
1172 | { | |
1173 | smp_send_stop(); | |
1174 | on_reboot_trigger.action->fn(&on_reboot_trigger); | |
1175 | reipl_run(NULL); | |
1176 | } | |
1177 | void (*_machine_restart)(char *command) = do_machine_restart; | |
1178 | ||
1179 | /* on panic */ | |
1180 | ||
1181 | static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action}; | |
1182 | ||
1183 | static ssize_t on_panic_show(struct kobject *kobj, | |
1184 | struct kobj_attribute *attr, char *page) | |
1185 | { | |
1186 | return sprintf(page, "%s\n", on_panic_trigger.action->name); | |
1187 | } | |
1188 | ||
1189 | static ssize_t on_panic_store(struct kobject *kobj, | |
1190 | struct kobj_attribute *attr, | |
1191 | const char *buf, size_t len) | |
1192 | { | |
1193 | return set_trigger(buf, &on_panic_trigger, len); | |
1194 | } | |
1195 | ||
1196 | static struct kobj_attribute on_panic_attr = | |
1197 | __ATTR(on_panic, 0644, on_panic_show, on_panic_store); | |
1198 | ||
1199 | static void do_panic(void) | |
1200 | { | |
1201 | on_panic_trigger.action->fn(&on_panic_trigger); | |
1202 | stop_run(&on_panic_trigger); | |
1203 | } | |
1204 | ||
1205 | /* on halt */ | |
1206 | ||
1207 | static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action}; | |
1208 | ||
1209 | static ssize_t on_halt_show(struct kobject *kobj, | |
1210 | struct kobj_attribute *attr, char *page) | |
1211 | { | |
1212 | return sprintf(page, "%s\n", on_halt_trigger.action->name); | |
1213 | } | |
1214 | ||
1215 | static ssize_t on_halt_store(struct kobject *kobj, | |
1216 | struct kobj_attribute *attr, | |
1217 | const char *buf, size_t len) | |
1218 | { | |
1219 | return set_trigger(buf, &on_halt_trigger, len); | |
1220 | } | |
1221 | ||
1222 | static struct kobj_attribute on_halt_attr = | |
1223 | __ATTR(on_halt, 0644, on_halt_show, on_halt_store); | |
ff6b8ea6 | 1224 | |
99ca4e58 MH |
1225 | |
1226 | static void do_machine_halt(void) | |
1227 | { | |
1228 | smp_send_stop(); | |
1229 | on_halt_trigger.action->fn(&on_halt_trigger); | |
1230 | stop_run(&on_halt_trigger); | |
1231 | } | |
1232 | void (*_machine_halt)(void) = do_machine_halt; | |
1233 | ||
1234 | /* on power off */ | |
1235 | ||
1236 | static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action}; | |
1237 | ||
1238 | static ssize_t on_poff_show(struct kobject *kobj, | |
1239 | struct kobj_attribute *attr, char *page) | |
1240 | { | |
1241 | return sprintf(page, "%s\n", on_poff_trigger.action->name); | |
1242 | } | |
1243 | ||
1244 | static ssize_t on_poff_store(struct kobject *kobj, | |
1245 | struct kobj_attribute *attr, | |
1246 | const char *buf, size_t len) | |
1247 | { | |
1248 | return set_trigger(buf, &on_poff_trigger, len); | |
1249 | } | |
1250 | ||
1251 | static struct kobj_attribute on_poff_attr = | |
1252 | __ATTR(on_poff, 0644, on_poff_show, on_poff_store); | |
1253 | ||
1254 | ||
1255 | static void do_machine_power_off(void) | |
1256 | { | |
1257 | smp_send_stop(); | |
1258 | on_poff_trigger.action->fn(&on_poff_trigger); | |
1259 | stop_run(&on_poff_trigger); | |
1260 | } | |
1261 | void (*_machine_power_off)(void) = do_machine_power_off; | |
1262 | ||
1263 | static void __init shutdown_triggers_init(void) | |
1264 | { | |
d91885be | 1265 | shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL, |
f62ed9e3 | 1266 | firmware_kobj); |
d91885be | 1267 | if (!shutdown_actions_kset) |
99ca4e58 MH |
1268 | goto fail; |
1269 | if (sysfs_create_file(&shutdown_actions_kset->kobj, | |
1270 | &on_reboot_attr.attr)) | |
1271 | goto fail; | |
1272 | if (sysfs_create_file(&shutdown_actions_kset->kobj, | |
1273 | &on_panic_attr.attr)) | |
1274 | goto fail; | |
1275 | if (sysfs_create_file(&shutdown_actions_kset->kobj, | |
1276 | &on_halt_attr.attr)) | |
1277 | goto fail; | |
1278 | if (sysfs_create_file(&shutdown_actions_kset->kobj, | |
1279 | &on_poff_attr.attr)) | |
1280 | goto fail; | |
1281 | ||
1282 | return; | |
1283 | fail: | |
1284 | panic("shutdown_triggers_init failed\n"); | |
1285 | } | |
1286 | ||
1287 | static void __init shutdown_actions_init(void) | |
1288 | { | |
1289 | int i; | |
1290 | ||
1291 | for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) { | |
1292 | if (!shutdown_actions_list[i]->init) | |
1293 | continue; | |
1294 | if (shutdown_actions_list[i]->init()) | |
1295 | shutdown_actions_list[i] = NULL; | |
ff6b8ea6 | 1296 | } |
ff6b8ea6 MH |
1297 | } |
1298 | ||
1299 | static int __init s390_ipl_init(void) | |
1300 | { | |
ff6b8ea6 | 1301 | reipl_probe(); |
d09293ae | 1302 | sclp_get_ipl_info(&sclp_ipl_info); |
99ca4e58 MH |
1303 | shutdown_actions_init(); |
1304 | shutdown_triggers_init(); | |
ff6b8ea6 MH |
1305 | return 0; |
1306 | } | |
1307 | ||
1308 | __initcall(s390_ipl_init); | |
15e9b586 | 1309 | |
99ca4e58 MH |
1310 | static void __init strncpy_skip_quote(char *dst, char *src, int n) |
1311 | { | |
1312 | int sx, dx; | |
1313 | ||
1314 | dx = 0; | |
1315 | for (sx = 0; src[sx] != 0; sx++) { | |
1316 | if (src[sx] == '"') | |
1317 | continue; | |
1318 | dst[dx++] = src[sx]; | |
1319 | if (dx >= n) | |
1320 | break; | |
1321 | } | |
1322 | } | |
1323 | ||
1324 | static int __init vmcmd_on_reboot_setup(char *str) | |
1325 | { | |
1326 | if (!MACHINE_IS_VM) | |
1327 | return 1; | |
1328 | strncpy_skip_quote(vmcmd_on_reboot, str, 127); | |
1329 | vmcmd_on_reboot[127] = 0; | |
1330 | on_reboot_trigger.action = &vmcmd_action; | |
1331 | return 1; | |
1332 | } | |
1333 | __setup("vmreboot=", vmcmd_on_reboot_setup); | |
1334 | ||
1335 | static int __init vmcmd_on_panic_setup(char *str) | |
1336 | { | |
1337 | if (!MACHINE_IS_VM) | |
1338 | return 1; | |
1339 | strncpy_skip_quote(vmcmd_on_panic, str, 127); | |
1340 | vmcmd_on_panic[127] = 0; | |
1341 | on_panic_trigger.action = &vmcmd_action; | |
1342 | return 1; | |
1343 | } | |
1344 | __setup("vmpanic=", vmcmd_on_panic_setup); | |
1345 | ||
1346 | static int __init vmcmd_on_halt_setup(char *str) | |
1347 | { | |
1348 | if (!MACHINE_IS_VM) | |
1349 | return 1; | |
1350 | strncpy_skip_quote(vmcmd_on_halt, str, 127); | |
1351 | vmcmd_on_halt[127] = 0; | |
1352 | on_halt_trigger.action = &vmcmd_action; | |
1353 | return 1; | |
1354 | } | |
1355 | __setup("vmhalt=", vmcmd_on_halt_setup); | |
1356 | ||
1357 | static int __init vmcmd_on_poff_setup(char *str) | |
1358 | { | |
1359 | if (!MACHINE_IS_VM) | |
1360 | return 1; | |
1361 | strncpy_skip_quote(vmcmd_on_poff, str, 127); | |
1362 | vmcmd_on_poff[127] = 0; | |
1363 | on_poff_trigger.action = &vmcmd_action; | |
1364 | return 1; | |
1365 | } | |
1366 | __setup("vmpoff=", vmcmd_on_poff_setup); | |
1367 | ||
1368 | static int on_panic_notify(struct notifier_block *self, | |
1369 | unsigned long event, void *data) | |
1370 | { | |
1371 | do_panic(); | |
1372 | return NOTIFY_OK; | |
1373 | } | |
1374 | ||
1375 | static struct notifier_block on_panic_nb = { | |
1376 | .notifier_call = on_panic_notify, | |
1377 | .priority = 0, | |
1378 | }; | |
1379 | ||
1380 | void __init setup_ipl(void) | |
1381 | { | |
1382 | ipl_info.type = get_ipl_type(); | |
1383 | switch (ipl_info.type) { | |
1384 | case IPL_TYPE_CCW: | |
1385 | ipl_info.data.ccw.dev_id.devno = ipl_devno; | |
1386 | ipl_info.data.ccw.dev_id.ssid = 0; | |
1387 | break; | |
1388 | case IPL_TYPE_FCP: | |
1389 | case IPL_TYPE_FCP_DUMP: | |
1390 | ipl_info.data.fcp.dev_id.devno = | |
1391 | IPL_PARMBLOCK_START->ipl_info.fcp.devno; | |
1392 | ipl_info.data.fcp.dev_id.ssid = 0; | |
1393 | ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn; | |
1394 | ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun; | |
1395 | break; | |
1396 | case IPL_TYPE_NSS: | |
1397 | strncpy(ipl_info.data.nss.name, kernel_nss_name, | |
1398 | sizeof(ipl_info.data.nss.name)); | |
1399 | break; | |
1400 | case IPL_TYPE_UNKNOWN: | |
1401 | default: | |
1402 | /* We have no info to copy */ | |
1403 | break; | |
1404 | } | |
1405 | atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb); | |
1406 | } | |
1407 | ||
6fc321fd HC |
1408 | void __init ipl_save_parameters(void) |
1409 | { | |
1410 | struct cio_iplinfo iplinfo; | |
1411 | unsigned int *ipl_ptr; | |
1412 | void *src, *dst; | |
1413 | ||
1414 | if (cio_get_iplinfo(&iplinfo)) | |
1415 | return; | |
1416 | ||
1417 | ipl_devno = iplinfo.devno; | |
1418 | ipl_flags |= IPL_DEVNO_VALID; | |
1419 | if (!iplinfo.is_qdio) | |
1420 | return; | |
1421 | ipl_flags |= IPL_PARMBLOCK_VALID; | |
1422 | ipl_ptr = (unsigned int *)__LC_IPL_PARMBLOCK_PTR; | |
1423 | src = (void *)(unsigned long)*ipl_ptr; | |
1424 | dst = (void *)IPL_PARMBLOCK_ORIGIN; | |
1425 | memmove(dst, src, PAGE_SIZE); | |
1426 | *ipl_ptr = IPL_PARMBLOCK_ORIGIN; | |
1427 | } | |
1428 | ||
15e9b586 HC |
1429 | static LIST_HEAD(rcall); |
1430 | static DEFINE_MUTEX(rcall_mutex); | |
1431 | ||
1432 | void register_reset_call(struct reset_call *reset) | |
1433 | { | |
1434 | mutex_lock(&rcall_mutex); | |
1435 | list_add(&reset->list, &rcall); | |
1436 | mutex_unlock(&rcall_mutex); | |
1437 | } | |
1438 | EXPORT_SYMBOL_GPL(register_reset_call); | |
1439 | ||
1440 | void unregister_reset_call(struct reset_call *reset) | |
1441 | { | |
1442 | mutex_lock(&rcall_mutex); | |
1443 | list_del(&reset->list); | |
1444 | mutex_unlock(&rcall_mutex); | |
1445 | } | |
1446 | EXPORT_SYMBOL_GPL(unregister_reset_call); | |
1447 | ||
1448 | static void do_reset_calls(void) | |
1449 | { | |
1450 | struct reset_call *reset; | |
1451 | ||
1452 | list_for_each_entry(reset, &rcall, list) | |
1453 | reset->fn(); | |
1454 | } | |
1455 | ||
c5dd8586 | 1456 | u32 dump_prefix_page; |
15e9b586 HC |
1457 | |
1458 | void s390_reset_system(void) | |
1459 | { | |
1460 | struct _lowcore *lc; | |
1461 | ||
15e9b586 | 1462 | lc = (struct _lowcore *)(unsigned long) store_prefix(); |
a45e1414 MH |
1463 | |
1464 | /* Stack for interrupt/machine check handler */ | |
15e9b586 HC |
1465 | lc->panic_stack = S390_lowcore.panic_stack; |
1466 | ||
da1cf23e | 1467 | /* Save prefix page address for dump case */ |
c5dd8586 | 1468 | dump_prefix_page = (u32)(unsigned long) lc; |
da1cf23e | 1469 | |
15e9b586 HC |
1470 | /* Disable prefixing */ |
1471 | set_prefix(0); | |
1472 | ||
1473 | /* Disable lowcore protection */ | |
1474 | __ctl_clear_bit(0,28); | |
1475 | ||
1476 | /* Set new machine check handler */ | |
c1821c2e | 1477 | S390_lowcore.mcck_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK; |
15e9b586 | 1478 | S390_lowcore.mcck_new_psw.addr = |
ab14de6c | 1479 | PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler; |
a45e1414 MH |
1480 | |
1481 | /* Set new program check handler */ | |
c1821c2e | 1482 | S390_lowcore.program_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK; |
a45e1414 | 1483 | S390_lowcore.program_new_psw.addr = |
ab14de6c | 1484 | PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler; |
a45e1414 | 1485 | |
15e9b586 HC |
1486 | do_reset_calls(); |
1487 | } | |
99ca4e58 | 1488 |