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ff6b8ea6 MH |
1 | /* |
2 | * arch/s390/kernel/ipl.c | |
3 | * ipl/reipl/dump support for Linux on s390. | |
4 | * | |
5 | * Copyright (C) IBM Corp. 2005,2006 | |
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 | |
ab14de6c HC |
28 | #define SCCB_VALID (s390_readinfo_sccb.header.response_code == 0x10) |
29 | #define SCCB_LOADPARM (&s390_readinfo_sccb.loadparm) | |
30 | #define SCCB_FLAG (s390_readinfo_sccb.flags) | |
ff6b8ea6 MH |
31 | |
32 | enum ipl_type { | |
33 | IPL_TYPE_NONE = 1, | |
34 | IPL_TYPE_UNKNOWN = 2, | |
35 | IPL_TYPE_CCW = 4, | |
36 | IPL_TYPE_FCP = 8, | |
fe355b7f | 37 | IPL_TYPE_NSS = 16, |
ff6b8ea6 MH |
38 | }; |
39 | ||
40 | #define IPL_NONE_STR "none" | |
41 | #define IPL_UNKNOWN_STR "unknown" | |
42 | #define IPL_CCW_STR "ccw" | |
43 | #define IPL_FCP_STR "fcp" | |
fe355b7f | 44 | #define IPL_NSS_STR "nss" |
ff6b8ea6 MH |
45 | |
46 | static char *ipl_type_str(enum ipl_type type) | |
47 | { | |
48 | switch (type) { | |
49 | case IPL_TYPE_NONE: | |
50 | return IPL_NONE_STR; | |
51 | case IPL_TYPE_CCW: | |
52 | return IPL_CCW_STR; | |
53 | case IPL_TYPE_FCP: | |
54 | return IPL_FCP_STR; | |
fe355b7f HY |
55 | case IPL_TYPE_NSS: |
56 | return IPL_NSS_STR; | |
ff6b8ea6 MH |
57 | case IPL_TYPE_UNKNOWN: |
58 | default: | |
59 | return IPL_UNKNOWN_STR; | |
60 | } | |
61 | } | |
62 | ||
63 | enum ipl_method { | |
64 | IPL_METHOD_NONE, | |
65 | IPL_METHOD_CCW_CIO, | |
66 | IPL_METHOD_CCW_DIAG, | |
67 | IPL_METHOD_CCW_VM, | |
68 | IPL_METHOD_FCP_RO_DIAG, | |
69 | IPL_METHOD_FCP_RW_DIAG, | |
70 | IPL_METHOD_FCP_RO_VM, | |
fe355b7f | 71 | IPL_METHOD_NSS, |
ff6b8ea6 MH |
72 | }; |
73 | ||
74 | enum shutdown_action { | |
75 | SHUTDOWN_REIPL, | |
76 | SHUTDOWN_DUMP, | |
77 | SHUTDOWN_STOP, | |
78 | }; | |
79 | ||
80 | #define SHUTDOWN_REIPL_STR "reipl" | |
81 | #define SHUTDOWN_DUMP_STR "dump" | |
82 | #define SHUTDOWN_STOP_STR "stop" | |
83 | ||
84 | static char *shutdown_action_str(enum shutdown_action action) | |
85 | { | |
86 | switch (action) { | |
87 | case SHUTDOWN_REIPL: | |
88 | return SHUTDOWN_REIPL_STR; | |
89 | case SHUTDOWN_DUMP: | |
90 | return SHUTDOWN_DUMP_STR; | |
91 | case SHUTDOWN_STOP: | |
92 | return SHUTDOWN_STOP_STR; | |
93 | default: | |
2b932936 | 94 | return NULL; |
ff6b8ea6 MH |
95 | } |
96 | } | |
97 | ||
ff6b8ea6 MH |
98 | static int diag308_set_works = 0; |
99 | ||
100 | static int reipl_capabilities = IPL_TYPE_UNKNOWN; | |
fe355b7f | 101 | |
ff6b8ea6 MH |
102 | static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN; |
103 | static enum ipl_method reipl_method = IPL_METHOD_NONE; | |
104 | static struct ipl_parameter_block *reipl_block_fcp; | |
105 | static struct ipl_parameter_block *reipl_block_ccw; | |
106 | ||
fe355b7f HY |
107 | static char reipl_nss_name[NSS_NAME_SIZE + 1]; |
108 | ||
ff6b8ea6 MH |
109 | static int dump_capabilities = IPL_TYPE_NONE; |
110 | static enum ipl_type dump_type = IPL_TYPE_NONE; | |
111 | static enum ipl_method dump_method = IPL_METHOD_NONE; | |
112 | static struct ipl_parameter_block *dump_block_fcp; | |
113 | static struct ipl_parameter_block *dump_block_ccw; | |
114 | ||
115 | static enum shutdown_action on_panic_action = SHUTDOWN_STOP; | |
116 | ||
46b05d26 | 117 | int diag308(unsigned long subcode, void *addr) |
ff6b8ea6 | 118 | { |
94c12cc7 | 119 | register unsigned long _addr asm("0") = (unsigned long) addr; |
ff6b8ea6 MH |
120 | register unsigned long _rc asm("1") = 0; |
121 | ||
94c12cc7 MS |
122 | asm volatile( |
123 | " diag %0,%2,0x308\n" | |
124 | "0:\n" | |
125 | EX_TABLE(0b,0b) | |
ff6b8ea6 | 126 | : "+d" (_addr), "+d" (_rc) |
94c12cc7 | 127 | : "d" (subcode) : "cc", "memory"); |
ff6b8ea6 MH |
128 | return _rc; |
129 | } | |
130 | ||
131 | /* SYSFS */ | |
132 | ||
133 | #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \ | |
134 | static ssize_t sys_##_prefix##_##_name##_show(struct subsystem *subsys, \ | |
135 | char *page) \ | |
136 | { \ | |
137 | return sprintf(page, _format, _value); \ | |
138 | } \ | |
139 | static struct subsys_attribute sys_##_prefix##_##_name##_attr = \ | |
140 | __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL); | |
141 | ||
142 | #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \ | |
143 | static ssize_t sys_##_prefix##_##_name##_show(struct subsystem *subsys, \ | |
144 | char *page) \ | |
145 | { \ | |
146 | return sprintf(page, _fmt_out, \ | |
147 | (unsigned long long) _value); \ | |
148 | } \ | |
149 | static ssize_t sys_##_prefix##_##_name##_store(struct subsystem *subsys,\ | |
150 | const char *buf, size_t len) \ | |
151 | { \ | |
152 | unsigned long long value; \ | |
153 | if (sscanf(buf, _fmt_in, &value) != 1) \ | |
154 | return -EINVAL; \ | |
155 | _value = value; \ | |
156 | return len; \ | |
157 | } \ | |
158 | static struct subsys_attribute sys_##_prefix##_##_name##_attr = \ | |
159 | __ATTR(_name,(S_IRUGO | S_IWUSR), \ | |
160 | sys_##_prefix##_##_name##_show, \ | |
161 | sys_##_prefix##_##_name##_store); | |
162 | ||
fe355b7f HY |
163 | #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\ |
164 | static ssize_t sys_##_prefix##_##_name##_show(struct subsystem *subsys, \ | |
165 | char *page) \ | |
166 | { \ | |
167 | return sprintf(page, _fmt_out, _value); \ | |
168 | } \ | |
169 | static ssize_t sys_##_prefix##_##_name##_store(struct subsystem *subsys,\ | |
170 | const char *buf, size_t len) \ | |
171 | { \ | |
172 | if (sscanf(buf, _fmt_in, _value) != 1) \ | |
173 | return -EINVAL; \ | |
174 | return len; \ | |
175 | } \ | |
176 | static struct subsys_attribute sys_##_prefix##_##_name##_attr = \ | |
177 | __ATTR(_name,(S_IRUGO | S_IWUSR), \ | |
178 | sys_##_prefix##_##_name##_show, \ | |
179 | sys_##_prefix##_##_name##_store); | |
180 | ||
ff6b8ea6 MH |
181 | static void make_attrs_ro(struct attribute **attrs) |
182 | { | |
183 | while (*attrs) { | |
184 | (*attrs)->mode = S_IRUGO; | |
185 | attrs++; | |
186 | } | |
187 | } | |
188 | ||
189 | /* | |
190 | * ipl section | |
191 | */ | |
192 | ||
193 | static enum ipl_type ipl_get_type(void) | |
194 | { | |
195 | struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START; | |
196 | ||
fe355b7f HY |
197 | if (ipl_flags & IPL_NSS_VALID) |
198 | return IPL_TYPE_NSS; | |
e87bfe51 | 199 | if (!(ipl_flags & IPL_DEVNO_VALID)) |
ff6b8ea6 | 200 | return IPL_TYPE_UNKNOWN; |
e87bfe51 | 201 | if (!(ipl_flags & IPL_PARMBLOCK_VALID)) |
ff6b8ea6 MH |
202 | return IPL_TYPE_CCW; |
203 | if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION) | |
204 | return IPL_TYPE_UNKNOWN; | |
205 | if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP) | |
206 | return IPL_TYPE_UNKNOWN; | |
207 | return IPL_TYPE_FCP; | |
208 | } | |
209 | ||
210 | static ssize_t ipl_type_show(struct subsystem *subsys, char *page) | |
211 | { | |
212 | return sprintf(page, "%s\n", ipl_type_str(ipl_get_type())); | |
213 | } | |
214 | ||
215 | static struct subsys_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type); | |
216 | ||
217 | static ssize_t sys_ipl_device_show(struct subsystem *subsys, char *page) | |
218 | { | |
219 | struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START; | |
220 | ||
221 | switch (ipl_get_type()) { | |
222 | case IPL_TYPE_CCW: | |
223 | return sprintf(page, "0.0.%04x\n", ipl_devno); | |
224 | case IPL_TYPE_FCP: | |
225 | return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno); | |
226 | default: | |
227 | return 0; | |
228 | } | |
229 | } | |
230 | ||
231 | static struct subsys_attribute sys_ipl_device_attr = | |
232 | __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL); | |
233 | ||
234 | static ssize_t ipl_parameter_read(struct kobject *kobj, char *buf, loff_t off, | |
235 | size_t count) | |
236 | { | |
237 | unsigned int size = IPL_PARMBLOCK_SIZE; | |
238 | ||
239 | if (off > size) | |
240 | return 0; | |
241 | if (off + count > size) | |
242 | count = size - off; | |
243 | memcpy(buf, (void *)IPL_PARMBLOCK_START + off, count); | |
244 | return count; | |
245 | } | |
246 | ||
247 | static struct bin_attribute ipl_parameter_attr = { | |
248 | .attr = { | |
249 | .name = "binary_parameter", | |
250 | .mode = S_IRUGO, | |
251 | .owner = THIS_MODULE, | |
252 | }, | |
253 | .size = PAGE_SIZE, | |
254 | .read = &ipl_parameter_read, | |
255 | }; | |
256 | ||
257 | static ssize_t ipl_scp_data_read(struct kobject *kobj, char *buf, loff_t off, | |
258 | size_t count) | |
259 | { | |
260 | unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len; | |
261 | void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data; | |
262 | ||
263 | if (off > size) | |
264 | return 0; | |
265 | if (off + count > size) | |
266 | count = size - off; | |
267 | memcpy(buf, scp_data + off, count); | |
268 | return count; | |
269 | } | |
270 | ||
271 | static struct bin_attribute ipl_scp_data_attr = { | |
272 | .attr = { | |
273 | .name = "scp_data", | |
274 | .mode = S_IRUGO, | |
275 | .owner = THIS_MODULE, | |
276 | }, | |
277 | .size = PAGE_SIZE, | |
278 | .read = &ipl_scp_data_read, | |
279 | }; | |
280 | ||
281 | /* FCP ipl device attributes */ | |
282 | ||
283 | DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long) | |
284 | IPL_PARMBLOCK_START->ipl_info.fcp.wwpn); | |
285 | DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long) | |
286 | IPL_PARMBLOCK_START->ipl_info.fcp.lun); | |
287 | DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long) | |
288 | IPL_PARMBLOCK_START->ipl_info.fcp.bootprog); | |
289 | DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long) | |
290 | IPL_PARMBLOCK_START->ipl_info.fcp.br_lba); | |
291 | ||
292 | static struct attribute *ipl_fcp_attrs[] = { | |
293 | &sys_ipl_type_attr.attr, | |
294 | &sys_ipl_device_attr.attr, | |
295 | &sys_ipl_fcp_wwpn_attr.attr, | |
296 | &sys_ipl_fcp_lun_attr.attr, | |
297 | &sys_ipl_fcp_bootprog_attr.attr, | |
298 | &sys_ipl_fcp_br_lba_attr.attr, | |
299 | NULL, | |
300 | }; | |
301 | ||
302 | static struct attribute_group ipl_fcp_attr_group = { | |
303 | .attrs = ipl_fcp_attrs, | |
304 | }; | |
305 | ||
306 | /* CCW ipl device attributes */ | |
307 | ||
03a4d208 MH |
308 | static ssize_t ipl_ccw_loadparm_show(struct subsystem *subsys, char *page) |
309 | { | |
310 | char loadparm[LOADPARM_LEN + 1] = {}; | |
311 | ||
312 | if (!SCCB_VALID) | |
313 | return sprintf(page, "#unknown#\n"); | |
314 | memcpy(loadparm, SCCB_LOADPARM, LOADPARM_LEN); | |
315 | EBCASC(loadparm, LOADPARM_LEN); | |
316 | strstrip(loadparm); | |
317 | return sprintf(page, "%s\n", loadparm); | |
318 | } | |
319 | ||
320 | static struct subsys_attribute sys_ipl_ccw_loadparm_attr = | |
321 | __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL); | |
322 | ||
ff6b8ea6 MH |
323 | static struct attribute *ipl_ccw_attrs[] = { |
324 | &sys_ipl_type_attr.attr, | |
325 | &sys_ipl_device_attr.attr, | |
03a4d208 | 326 | &sys_ipl_ccw_loadparm_attr.attr, |
ff6b8ea6 MH |
327 | NULL, |
328 | }; | |
329 | ||
330 | static struct attribute_group ipl_ccw_attr_group = { | |
331 | .attrs = ipl_ccw_attrs, | |
332 | }; | |
333 | ||
fe355b7f HY |
334 | /* NSS ipl device attributes */ |
335 | ||
336 | DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name); | |
337 | ||
338 | static struct attribute *ipl_nss_attrs[] = { | |
339 | &sys_ipl_type_attr.attr, | |
340 | &sys_ipl_nss_name_attr.attr, | |
341 | NULL, | |
342 | }; | |
343 | ||
344 | static struct attribute_group ipl_nss_attr_group = { | |
345 | .attrs = ipl_nss_attrs, | |
346 | }; | |
347 | ||
ff6b8ea6 MH |
348 | /* UNKNOWN ipl device attributes */ |
349 | ||
350 | static struct attribute *ipl_unknown_attrs[] = { | |
351 | &sys_ipl_type_attr.attr, | |
352 | NULL, | |
353 | }; | |
354 | ||
355 | static struct attribute_group ipl_unknown_attr_group = { | |
356 | .attrs = ipl_unknown_attrs, | |
357 | }; | |
358 | ||
359 | static decl_subsys(ipl, NULL, NULL); | |
360 | ||
361 | /* | |
362 | * reipl section | |
363 | */ | |
364 | ||
365 | /* FCP reipl device attributes */ | |
366 | ||
367 | DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n", | |
368 | reipl_block_fcp->ipl_info.fcp.wwpn); | |
369 | DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n", | |
370 | reipl_block_fcp->ipl_info.fcp.lun); | |
371 | DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n", | |
372 | reipl_block_fcp->ipl_info.fcp.bootprog); | |
373 | DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n", | |
374 | reipl_block_fcp->ipl_info.fcp.br_lba); | |
375 | DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n", | |
376 | reipl_block_fcp->ipl_info.fcp.devno); | |
377 | ||
378 | static struct attribute *reipl_fcp_attrs[] = { | |
379 | &sys_reipl_fcp_device_attr.attr, | |
380 | &sys_reipl_fcp_wwpn_attr.attr, | |
381 | &sys_reipl_fcp_lun_attr.attr, | |
382 | &sys_reipl_fcp_bootprog_attr.attr, | |
383 | &sys_reipl_fcp_br_lba_attr.attr, | |
384 | NULL, | |
385 | }; | |
386 | ||
387 | static struct attribute_group reipl_fcp_attr_group = { | |
388 | .name = IPL_FCP_STR, | |
389 | .attrs = reipl_fcp_attrs, | |
390 | }; | |
391 | ||
392 | /* CCW reipl device attributes */ | |
393 | ||
394 | DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n", | |
395 | reipl_block_ccw->ipl_info.ccw.devno); | |
396 | ||
03a4d208 MH |
397 | static void reipl_get_ascii_loadparm(char *loadparm) |
398 | { | |
399 | memcpy(loadparm, &reipl_block_ccw->ipl_info.ccw.load_param, | |
400 | LOADPARM_LEN); | |
401 | EBCASC(loadparm, LOADPARM_LEN); | |
402 | loadparm[LOADPARM_LEN] = 0; | |
403 | strstrip(loadparm); | |
404 | } | |
405 | ||
406 | static ssize_t reipl_ccw_loadparm_show(struct subsystem *subsys, char *page) | |
407 | { | |
408 | char buf[LOADPARM_LEN + 1]; | |
409 | ||
410 | reipl_get_ascii_loadparm(buf); | |
411 | return sprintf(page, "%s\n", buf); | |
412 | } | |
413 | ||
414 | static ssize_t reipl_ccw_loadparm_store(struct subsystem *subsys, | |
415 | const char *buf, size_t len) | |
416 | { | |
417 | int i, lp_len; | |
418 | ||
419 | /* ignore trailing newline */ | |
420 | lp_len = len; | |
421 | if ((len > 0) && (buf[len - 1] == '\n')) | |
422 | lp_len--; | |
423 | /* loadparm can have max 8 characters and must not start with a blank */ | |
424 | if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' '))) | |
425 | return -EINVAL; | |
426 | /* loadparm can only contain "a-z,A-Z,0-9,SP,." */ | |
427 | for (i = 0; i < lp_len; i++) { | |
428 | if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') || | |
429 | (buf[i] == '.')) | |
430 | continue; | |
431 | return -EINVAL; | |
432 | } | |
433 | /* initialize loadparm with blanks */ | |
434 | memset(&reipl_block_ccw->ipl_info.ccw.load_param, ' ', LOADPARM_LEN); | |
435 | /* copy and convert to ebcdic */ | |
436 | memcpy(&reipl_block_ccw->ipl_info.ccw.load_param, buf, lp_len); | |
437 | ASCEBC(reipl_block_ccw->ipl_info.ccw.load_param, LOADPARM_LEN); | |
438 | return len; | |
439 | } | |
440 | ||
441 | static struct subsys_attribute sys_reipl_ccw_loadparm_attr = | |
442 | __ATTR(loadparm, 0644, reipl_ccw_loadparm_show, | |
443 | reipl_ccw_loadparm_store); | |
444 | ||
ff6b8ea6 MH |
445 | static struct attribute *reipl_ccw_attrs[] = { |
446 | &sys_reipl_ccw_device_attr.attr, | |
03a4d208 | 447 | &sys_reipl_ccw_loadparm_attr.attr, |
ff6b8ea6 MH |
448 | NULL, |
449 | }; | |
450 | ||
451 | static struct attribute_group reipl_ccw_attr_group = { | |
452 | .name = IPL_CCW_STR, | |
453 | .attrs = reipl_ccw_attrs, | |
454 | }; | |
455 | ||
fe355b7f HY |
456 | |
457 | /* NSS reipl device attributes */ | |
458 | ||
459 | DEFINE_IPL_ATTR_STR_RW(reipl_nss, name, "%s\n", "%s\n", reipl_nss_name); | |
460 | ||
461 | static struct attribute *reipl_nss_attrs[] = { | |
462 | &sys_reipl_nss_name_attr.attr, | |
463 | NULL, | |
464 | }; | |
465 | ||
466 | static struct attribute_group reipl_nss_attr_group = { | |
467 | .name = IPL_NSS_STR, | |
468 | .attrs = reipl_nss_attrs, | |
469 | }; | |
470 | ||
ff6b8ea6 MH |
471 | /* reipl type */ |
472 | ||
473 | static int reipl_set_type(enum ipl_type type) | |
474 | { | |
475 | if (!(reipl_capabilities & type)) | |
476 | return -EINVAL; | |
477 | ||
478 | switch(type) { | |
479 | case IPL_TYPE_CCW: | |
480 | if (MACHINE_IS_VM) | |
481 | reipl_method = IPL_METHOD_CCW_VM; | |
482 | else | |
483 | reipl_method = IPL_METHOD_CCW_CIO; | |
484 | break; | |
485 | case IPL_TYPE_FCP: | |
486 | if (diag308_set_works) | |
487 | reipl_method = IPL_METHOD_FCP_RW_DIAG; | |
488 | else if (MACHINE_IS_VM) | |
489 | reipl_method = IPL_METHOD_FCP_RO_VM; | |
490 | else | |
491 | reipl_method = IPL_METHOD_FCP_RO_DIAG; | |
492 | break; | |
fe355b7f HY |
493 | case IPL_TYPE_NSS: |
494 | reipl_method = IPL_METHOD_NSS; | |
495 | break; | |
ff6b8ea6 MH |
496 | default: |
497 | reipl_method = IPL_METHOD_NONE; | |
498 | } | |
499 | reipl_type = type; | |
500 | return 0; | |
501 | } | |
502 | ||
503 | static ssize_t reipl_type_show(struct subsystem *subsys, char *page) | |
504 | { | |
505 | return sprintf(page, "%s\n", ipl_type_str(reipl_type)); | |
506 | } | |
507 | ||
508 | static ssize_t reipl_type_store(struct subsystem *subsys, const char *buf, | |
509 | size_t len) | |
510 | { | |
511 | int rc = -EINVAL; | |
512 | ||
513 | if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0) | |
514 | rc = reipl_set_type(IPL_TYPE_CCW); | |
515 | else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0) | |
516 | rc = reipl_set_type(IPL_TYPE_FCP); | |
fe355b7f HY |
517 | else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0) |
518 | rc = reipl_set_type(IPL_TYPE_NSS); | |
ff6b8ea6 MH |
519 | return (rc != 0) ? rc : len; |
520 | } | |
521 | ||
522 | static struct subsys_attribute reipl_type_attr = | |
523 | __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store); | |
524 | ||
525 | static decl_subsys(reipl, NULL, NULL); | |
526 | ||
527 | /* | |
528 | * dump section | |
529 | */ | |
530 | ||
531 | /* FCP dump device attributes */ | |
532 | ||
533 | DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n", | |
534 | dump_block_fcp->ipl_info.fcp.wwpn); | |
535 | DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n", | |
536 | dump_block_fcp->ipl_info.fcp.lun); | |
537 | DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n", | |
538 | dump_block_fcp->ipl_info.fcp.bootprog); | |
539 | DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n", | |
540 | dump_block_fcp->ipl_info.fcp.br_lba); | |
541 | DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n", | |
542 | dump_block_fcp->ipl_info.fcp.devno); | |
543 | ||
544 | static struct attribute *dump_fcp_attrs[] = { | |
545 | &sys_dump_fcp_device_attr.attr, | |
546 | &sys_dump_fcp_wwpn_attr.attr, | |
547 | &sys_dump_fcp_lun_attr.attr, | |
548 | &sys_dump_fcp_bootprog_attr.attr, | |
549 | &sys_dump_fcp_br_lba_attr.attr, | |
550 | NULL, | |
551 | }; | |
552 | ||
553 | static struct attribute_group dump_fcp_attr_group = { | |
554 | .name = IPL_FCP_STR, | |
555 | .attrs = dump_fcp_attrs, | |
556 | }; | |
557 | ||
558 | /* CCW dump device attributes */ | |
559 | ||
560 | DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n", | |
561 | dump_block_ccw->ipl_info.ccw.devno); | |
562 | ||
563 | static struct attribute *dump_ccw_attrs[] = { | |
564 | &sys_dump_ccw_device_attr.attr, | |
565 | NULL, | |
566 | }; | |
567 | ||
568 | static struct attribute_group dump_ccw_attr_group = { | |
569 | .name = IPL_CCW_STR, | |
570 | .attrs = dump_ccw_attrs, | |
571 | }; | |
572 | ||
573 | /* dump type */ | |
574 | ||
575 | static int dump_set_type(enum ipl_type type) | |
576 | { | |
577 | if (!(dump_capabilities & type)) | |
578 | return -EINVAL; | |
579 | switch(type) { | |
580 | case IPL_TYPE_CCW: | |
581 | if (MACHINE_IS_VM) | |
582 | dump_method = IPL_METHOD_CCW_VM; | |
583 | else | |
584 | dump_method = IPL_METHOD_CCW_CIO; | |
585 | break; | |
586 | case IPL_TYPE_FCP: | |
587 | dump_method = IPL_METHOD_FCP_RW_DIAG; | |
588 | break; | |
589 | default: | |
590 | dump_method = IPL_METHOD_NONE; | |
591 | } | |
592 | dump_type = type; | |
593 | return 0; | |
594 | } | |
595 | ||
596 | static ssize_t dump_type_show(struct subsystem *subsys, char *page) | |
597 | { | |
598 | return sprintf(page, "%s\n", ipl_type_str(dump_type)); | |
599 | } | |
600 | ||
601 | static ssize_t dump_type_store(struct subsystem *subsys, const char *buf, | |
602 | size_t len) | |
603 | { | |
604 | int rc = -EINVAL; | |
605 | ||
606 | if (strncmp(buf, IPL_NONE_STR, strlen(IPL_NONE_STR)) == 0) | |
607 | rc = dump_set_type(IPL_TYPE_NONE); | |
608 | else if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0) | |
609 | rc = dump_set_type(IPL_TYPE_CCW); | |
610 | else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0) | |
611 | rc = dump_set_type(IPL_TYPE_FCP); | |
612 | return (rc != 0) ? rc : len; | |
613 | } | |
614 | ||
615 | static struct subsys_attribute dump_type_attr = | |
616 | __ATTR(dump_type, 0644, dump_type_show, dump_type_store); | |
617 | ||
618 | static decl_subsys(dump, NULL, NULL); | |
619 | ||
ff6b8ea6 MH |
620 | /* |
621 | * Shutdown actions section | |
622 | */ | |
623 | ||
624 | static decl_subsys(shutdown_actions, NULL, NULL); | |
625 | ||
626 | /* on panic */ | |
627 | ||
628 | static ssize_t on_panic_show(struct subsystem *subsys, char *page) | |
629 | { | |
630 | return sprintf(page, "%s\n", shutdown_action_str(on_panic_action)); | |
631 | } | |
632 | ||
633 | static ssize_t on_panic_store(struct subsystem *subsys, const char *buf, | |
634 | size_t len) | |
635 | { | |
636 | if (strncmp(buf, SHUTDOWN_REIPL_STR, strlen(SHUTDOWN_REIPL_STR)) == 0) | |
637 | on_panic_action = SHUTDOWN_REIPL; | |
638 | else if (strncmp(buf, SHUTDOWN_DUMP_STR, | |
639 | strlen(SHUTDOWN_DUMP_STR)) == 0) | |
640 | on_panic_action = SHUTDOWN_DUMP; | |
641 | else if (strncmp(buf, SHUTDOWN_STOP_STR, | |
642 | strlen(SHUTDOWN_STOP_STR)) == 0) | |
643 | on_panic_action = SHUTDOWN_STOP; | |
644 | else | |
645 | return -EINVAL; | |
646 | ||
647 | return len; | |
648 | } | |
649 | ||
650 | static struct subsys_attribute on_panic_attr = | |
651 | __ATTR(on_panic, 0644, on_panic_show, on_panic_store); | |
652 | ||
ff6b8ea6 MH |
653 | void do_reipl(void) |
654 | { | |
655 | struct ccw_dev_id devid; | |
656 | static char buf[100]; | |
03a4d208 | 657 | char loadparm[LOADPARM_LEN + 1]; |
ff6b8ea6 | 658 | |
ff6b8ea6 MH |
659 | switch (reipl_method) { |
660 | case IPL_METHOD_CCW_CIO: | |
661 | devid.devno = reipl_block_ccw->ipl_info.ccw.devno; | |
5986b0e8 MH |
662 | if (ipl_get_type() == IPL_TYPE_CCW && devid.devno == ipl_devno) |
663 | diag308(DIAG308_IPL, NULL); | |
ff6b8ea6 MH |
664 | devid.ssid = 0; |
665 | reipl_ccw_dev(&devid); | |
666 | break; | |
667 | case IPL_METHOD_CCW_VM: | |
58be9441 | 668 | reipl_get_ascii_loadparm(loadparm); |
03a4d208 MH |
669 | if (strlen(loadparm) == 0) |
670 | sprintf(buf, "IPL %X", | |
671 | reipl_block_ccw->ipl_info.ccw.devno); | |
672 | else | |
673 | sprintf(buf, "IPL %X LOADPARM '%s'", | |
674 | reipl_block_ccw->ipl_info.ccw.devno, loadparm); | |
740b5706 | 675 | __cpcmd(buf, NULL, 0, NULL); |
ff6b8ea6 MH |
676 | break; |
677 | case IPL_METHOD_CCW_DIAG: | |
678 | diag308(DIAG308_SET, reipl_block_ccw); | |
679 | diag308(DIAG308_IPL, NULL); | |
680 | break; | |
681 | case IPL_METHOD_FCP_RW_DIAG: | |
682 | diag308(DIAG308_SET, reipl_block_fcp); | |
683 | diag308(DIAG308_IPL, NULL); | |
684 | break; | |
685 | case IPL_METHOD_FCP_RO_DIAG: | |
686 | diag308(DIAG308_IPL, NULL); | |
687 | break; | |
688 | case IPL_METHOD_FCP_RO_VM: | |
740b5706 | 689 | __cpcmd("IPL", NULL, 0, NULL); |
ff6b8ea6 | 690 | break; |
fe355b7f HY |
691 | case IPL_METHOD_NSS: |
692 | sprintf(buf, "IPL %s", reipl_nss_name); | |
693 | __cpcmd(buf, NULL, 0, NULL); | |
694 | break; | |
ff6b8ea6 MH |
695 | case IPL_METHOD_NONE: |
696 | default: | |
697 | if (MACHINE_IS_VM) | |
740b5706 | 698 | __cpcmd("IPL", NULL, 0, NULL); |
ff6b8ea6 MH |
699 | diag308(DIAG308_IPL, NULL); |
700 | break; | |
701 | } | |
3902e476 | 702 | signal_processor(smp_processor_id(), sigp_stop_and_store_status); |
ff6b8ea6 MH |
703 | } |
704 | ||
705 | static void do_dump(void) | |
706 | { | |
707 | struct ccw_dev_id devid; | |
708 | static char buf[100]; | |
709 | ||
ff6b8ea6 MH |
710 | switch (dump_method) { |
711 | case IPL_METHOD_CCW_CIO: | |
c6b5b847 | 712 | smp_send_stop(); |
ff6b8ea6 MH |
713 | devid.devno = dump_block_ccw->ipl_info.ccw.devno; |
714 | devid.ssid = 0; | |
715 | reipl_ccw_dev(&devid); | |
716 | break; | |
717 | case IPL_METHOD_CCW_VM: | |
c6b5b847 | 718 | smp_send_stop(); |
ff6b8ea6 | 719 | sprintf(buf, "STORE STATUS"); |
740b5706 | 720 | __cpcmd(buf, NULL, 0, NULL); |
ff6b8ea6 | 721 | sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno); |
740b5706 | 722 | __cpcmd(buf, NULL, 0, NULL); |
ff6b8ea6 MH |
723 | break; |
724 | case IPL_METHOD_CCW_DIAG: | |
725 | diag308(DIAG308_SET, dump_block_ccw); | |
726 | diag308(DIAG308_DUMP, NULL); | |
727 | break; | |
728 | case IPL_METHOD_FCP_RW_DIAG: | |
729 | diag308(DIAG308_SET, dump_block_fcp); | |
730 | diag308(DIAG308_DUMP, NULL); | |
731 | break; | |
732 | case IPL_METHOD_NONE: | |
733 | default: | |
734 | return; | |
735 | } | |
736 | printk(KERN_EMERG "Dump failed!\n"); | |
737 | } | |
738 | ||
739 | /* init functions */ | |
740 | ||
741 | static int __init ipl_register_fcp_files(void) | |
742 | { | |
743 | int rc; | |
744 | ||
745 | rc = sysfs_create_group(&ipl_subsys.kset.kobj, | |
746 | &ipl_fcp_attr_group); | |
747 | if (rc) | |
748 | goto out; | |
749 | rc = sysfs_create_bin_file(&ipl_subsys.kset.kobj, | |
750 | &ipl_parameter_attr); | |
751 | if (rc) | |
752 | goto out_ipl_parm; | |
753 | rc = sysfs_create_bin_file(&ipl_subsys.kset.kobj, | |
754 | &ipl_scp_data_attr); | |
755 | if (!rc) | |
756 | goto out; | |
757 | ||
758 | sysfs_remove_bin_file(&ipl_subsys.kset.kobj, &ipl_parameter_attr); | |
759 | ||
760 | out_ipl_parm: | |
761 | sysfs_remove_group(&ipl_subsys.kset.kobj, &ipl_fcp_attr_group); | |
762 | out: | |
763 | return rc; | |
764 | } | |
765 | ||
766 | static int __init ipl_init(void) | |
767 | { | |
768 | int rc; | |
769 | ||
770 | rc = firmware_register(&ipl_subsys); | |
771 | if (rc) | |
772 | return rc; | |
773 | switch (ipl_get_type()) { | |
774 | case IPL_TYPE_CCW: | |
775 | rc = sysfs_create_group(&ipl_subsys.kset.kobj, | |
776 | &ipl_ccw_attr_group); | |
777 | break; | |
778 | case IPL_TYPE_FCP: | |
779 | rc = ipl_register_fcp_files(); | |
780 | break; | |
fe355b7f HY |
781 | case IPL_TYPE_NSS: |
782 | rc = sysfs_create_group(&ipl_subsys.kset.kobj, | |
783 | &ipl_nss_attr_group); | |
784 | break; | |
ff6b8ea6 MH |
785 | default: |
786 | rc = sysfs_create_group(&ipl_subsys.kset.kobj, | |
787 | &ipl_unknown_attr_group); | |
788 | break; | |
789 | } | |
790 | if (rc) | |
791 | firmware_unregister(&ipl_subsys); | |
792 | return rc; | |
793 | } | |
794 | ||
795 | static void __init reipl_probe(void) | |
796 | { | |
797 | void *buffer; | |
798 | ||
799 | buffer = (void *) get_zeroed_page(GFP_KERNEL); | |
800 | if (!buffer) | |
801 | return; | |
802 | if (diag308(DIAG308_STORE, buffer) == DIAG308_RC_OK) | |
803 | diag308_set_works = 1; | |
804 | free_page((unsigned long)buffer); | |
805 | } | |
806 | ||
fe355b7f HY |
807 | static int __init reipl_nss_init(void) |
808 | { | |
809 | int rc; | |
810 | ||
811 | if (!MACHINE_IS_VM) | |
812 | return 0; | |
813 | rc = sysfs_create_group(&reipl_subsys.kset.kobj, &reipl_nss_attr_group); | |
814 | if (rc) | |
815 | return rc; | |
816 | strncpy(reipl_nss_name, kernel_nss_name, NSS_NAME_SIZE + 1); | |
817 | reipl_capabilities |= IPL_TYPE_NSS; | |
818 | return 0; | |
819 | } | |
820 | ||
ff6b8ea6 MH |
821 | static int __init reipl_ccw_init(void) |
822 | { | |
823 | int rc; | |
824 | ||
825 | reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL); | |
826 | if (!reipl_block_ccw) | |
827 | return -ENOMEM; | |
828 | rc = sysfs_create_group(&reipl_subsys.kset.kobj, &reipl_ccw_attr_group); | |
829 | if (rc) { | |
830 | free_page((unsigned long)reipl_block_ccw); | |
831 | return rc; | |
832 | } | |
833 | reipl_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN; | |
834 | reipl_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION; | |
835 | reipl_block_ccw->hdr.blk0_len = sizeof(reipl_block_ccw->ipl_info.ccw); | |
836 | reipl_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW; | |
03a4d208 MH |
837 | /* check if read scp info worked and set loadparm */ |
838 | if (SCCB_VALID) | |
839 | memcpy(reipl_block_ccw->ipl_info.ccw.load_param, | |
840 | SCCB_LOADPARM, LOADPARM_LEN); | |
841 | else | |
842 | /* read scp info failed: set empty loadparm (EBCDIC blanks) */ | |
843 | memset(reipl_block_ccw->ipl_info.ccw.load_param, 0x40, | |
844 | LOADPARM_LEN); | |
845 | /* FIXME: check for diag308_set_works when enabling diag ccw reipl */ | |
846 | if (!MACHINE_IS_VM) | |
847 | sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO; | |
ff6b8ea6 MH |
848 | if (ipl_get_type() == IPL_TYPE_CCW) |
849 | reipl_block_ccw->ipl_info.ccw.devno = ipl_devno; | |
850 | reipl_capabilities |= IPL_TYPE_CCW; | |
851 | return 0; | |
852 | } | |
853 | ||
854 | static int __init reipl_fcp_init(void) | |
855 | { | |
856 | int rc; | |
857 | ||
858 | if ((!diag308_set_works) && (ipl_get_type() != IPL_TYPE_FCP)) | |
859 | return 0; | |
860 | if ((!diag308_set_works) && (ipl_get_type() == IPL_TYPE_FCP)) | |
861 | make_attrs_ro(reipl_fcp_attrs); | |
862 | ||
863 | reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL); | |
864 | if (!reipl_block_fcp) | |
865 | return -ENOMEM; | |
866 | rc = sysfs_create_group(&reipl_subsys.kset.kobj, &reipl_fcp_attr_group); | |
867 | if (rc) { | |
868 | free_page((unsigned long)reipl_block_fcp); | |
869 | return rc; | |
870 | } | |
871 | if (ipl_get_type() == IPL_TYPE_FCP) { | |
872 | memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE); | |
873 | } else { | |
874 | reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN; | |
875 | reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION; | |
876 | reipl_block_fcp->hdr.blk0_len = | |
877 | sizeof(reipl_block_fcp->ipl_info.fcp); | |
878 | reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP; | |
879 | reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL; | |
880 | } | |
881 | reipl_capabilities |= IPL_TYPE_FCP; | |
882 | return 0; | |
883 | } | |
884 | ||
885 | static int __init reipl_init(void) | |
886 | { | |
887 | int rc; | |
888 | ||
889 | rc = firmware_register(&reipl_subsys); | |
890 | if (rc) | |
891 | return rc; | |
892 | rc = subsys_create_file(&reipl_subsys, &reipl_type_attr); | |
893 | if (rc) { | |
894 | firmware_unregister(&reipl_subsys); | |
895 | return rc; | |
896 | } | |
897 | rc = reipl_ccw_init(); | |
898 | if (rc) | |
899 | return rc; | |
900 | rc = reipl_fcp_init(); | |
fe355b7f HY |
901 | if (rc) |
902 | return rc; | |
903 | rc = reipl_nss_init(); | |
ff6b8ea6 MH |
904 | if (rc) |
905 | return rc; | |
906 | rc = reipl_set_type(ipl_get_type()); | |
907 | if (rc) | |
908 | return rc; | |
909 | return 0; | |
910 | } | |
911 | ||
912 | static int __init dump_ccw_init(void) | |
913 | { | |
914 | int rc; | |
915 | ||
916 | dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL); | |
917 | if (!dump_block_ccw) | |
918 | return -ENOMEM; | |
919 | rc = sysfs_create_group(&dump_subsys.kset.kobj, &dump_ccw_attr_group); | |
920 | if (rc) { | |
921 | free_page((unsigned long)dump_block_ccw); | |
922 | return rc; | |
923 | } | |
924 | dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN; | |
925 | dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION; | |
926 | dump_block_ccw->hdr.blk0_len = sizeof(reipl_block_ccw->ipl_info.ccw); | |
927 | dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW; | |
928 | dump_capabilities |= IPL_TYPE_CCW; | |
929 | return 0; | |
930 | } | |
931 | ||
ff6b8ea6 MH |
932 | static int __init dump_fcp_init(void) |
933 | { | |
934 | int rc; | |
935 | ||
03a4d208 | 936 | if(!(SCCB_FLAG & 0x2) || !SCCB_VALID) |
ff6b8ea6 MH |
937 | return 0; /* LDIPL DUMP is not installed */ |
938 | if (!diag308_set_works) | |
939 | return 0; | |
940 | dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL); | |
941 | if (!dump_block_fcp) | |
942 | return -ENOMEM; | |
943 | rc = sysfs_create_group(&dump_subsys.kset.kobj, &dump_fcp_attr_group); | |
944 | if (rc) { | |
945 | free_page((unsigned long)dump_block_fcp); | |
946 | return rc; | |
947 | } | |
948 | dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN; | |
949 | dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION; | |
950 | dump_block_fcp->hdr.blk0_len = sizeof(dump_block_fcp->ipl_info.fcp); | |
951 | dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP; | |
952 | dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP; | |
953 | dump_capabilities |= IPL_TYPE_FCP; | |
954 | return 0; | |
955 | } | |
956 | ||
957 | #define SHUTDOWN_ON_PANIC_PRIO 0 | |
958 | ||
959 | static int shutdown_on_panic_notify(struct notifier_block *self, | |
960 | unsigned long event, void *data) | |
961 | { | |
962 | if (on_panic_action == SHUTDOWN_DUMP) | |
963 | do_dump(); | |
964 | else if (on_panic_action == SHUTDOWN_REIPL) | |
965 | do_reipl(); | |
966 | return NOTIFY_OK; | |
967 | } | |
968 | ||
969 | static struct notifier_block shutdown_on_panic_nb = { | |
970 | .notifier_call = shutdown_on_panic_notify, | |
971 | .priority = SHUTDOWN_ON_PANIC_PRIO | |
972 | }; | |
973 | ||
974 | static int __init dump_init(void) | |
975 | { | |
976 | int rc; | |
977 | ||
978 | rc = firmware_register(&dump_subsys); | |
979 | if (rc) | |
980 | return rc; | |
981 | rc = subsys_create_file(&dump_subsys, &dump_type_attr); | |
982 | if (rc) { | |
983 | firmware_unregister(&dump_subsys); | |
984 | return rc; | |
985 | } | |
986 | rc = dump_ccw_init(); | |
987 | if (rc) | |
988 | return rc; | |
989 | rc = dump_fcp_init(); | |
990 | if (rc) | |
991 | return rc; | |
992 | dump_set_type(IPL_TYPE_NONE); | |
993 | return 0; | |
994 | } | |
995 | ||
996 | static int __init shutdown_actions_init(void) | |
997 | { | |
998 | int rc; | |
999 | ||
1000 | rc = firmware_register(&shutdown_actions_subsys); | |
1001 | if (rc) | |
1002 | return rc; | |
1003 | rc = subsys_create_file(&shutdown_actions_subsys, &on_panic_attr); | |
1004 | if (rc) { | |
1005 | firmware_unregister(&shutdown_actions_subsys); | |
1006 | return rc; | |
1007 | } | |
1008 | atomic_notifier_chain_register(&panic_notifier_list, | |
1009 | &shutdown_on_panic_nb); | |
1010 | return 0; | |
1011 | } | |
1012 | ||
1013 | static int __init s390_ipl_init(void) | |
1014 | { | |
1015 | int rc; | |
1016 | ||
1017 | reipl_probe(); | |
1018 | rc = ipl_init(); | |
1019 | if (rc) | |
1020 | return rc; | |
1021 | rc = reipl_init(); | |
1022 | if (rc) | |
1023 | return rc; | |
1024 | rc = dump_init(); | |
1025 | if (rc) | |
1026 | return rc; | |
1027 | rc = shutdown_actions_init(); | |
1028 | if (rc) | |
1029 | return rc; | |
1030 | return 0; | |
1031 | } | |
1032 | ||
1033 | __initcall(s390_ipl_init); | |
15e9b586 HC |
1034 | |
1035 | static LIST_HEAD(rcall); | |
1036 | static DEFINE_MUTEX(rcall_mutex); | |
1037 | ||
1038 | void register_reset_call(struct reset_call *reset) | |
1039 | { | |
1040 | mutex_lock(&rcall_mutex); | |
1041 | list_add(&reset->list, &rcall); | |
1042 | mutex_unlock(&rcall_mutex); | |
1043 | } | |
1044 | EXPORT_SYMBOL_GPL(register_reset_call); | |
1045 | ||
1046 | void unregister_reset_call(struct reset_call *reset) | |
1047 | { | |
1048 | mutex_lock(&rcall_mutex); | |
1049 | list_del(&reset->list); | |
1050 | mutex_unlock(&rcall_mutex); | |
1051 | } | |
1052 | EXPORT_SYMBOL_GPL(unregister_reset_call); | |
1053 | ||
1054 | static void do_reset_calls(void) | |
1055 | { | |
1056 | struct reset_call *reset; | |
1057 | ||
1058 | list_for_each_entry(reset, &rcall, list) | |
1059 | reset->fn(); | |
1060 | } | |
1061 | ||
da1cf23e | 1062 | extern __u32 dump_prefix_page; |
15e9b586 HC |
1063 | |
1064 | void s390_reset_system(void) | |
1065 | { | |
1066 | struct _lowcore *lc; | |
1067 | ||
15e9b586 | 1068 | lc = (struct _lowcore *)(unsigned long) store_prefix(); |
a45e1414 MH |
1069 | |
1070 | /* Stack for interrupt/machine check handler */ | |
15e9b586 HC |
1071 | lc->panic_stack = S390_lowcore.panic_stack; |
1072 | ||
da1cf23e MH |
1073 | /* Save prefix page address for dump case */ |
1074 | dump_prefix_page = (unsigned long) lc; | |
1075 | ||
15e9b586 HC |
1076 | /* Disable prefixing */ |
1077 | set_prefix(0); | |
1078 | ||
1079 | /* Disable lowcore protection */ | |
1080 | __ctl_clear_bit(0,28); | |
1081 | ||
1082 | /* Set new machine check handler */ | |
c1821c2e | 1083 | S390_lowcore.mcck_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK; |
15e9b586 | 1084 | S390_lowcore.mcck_new_psw.addr = |
ab14de6c | 1085 | PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler; |
a45e1414 MH |
1086 | |
1087 | /* Set new program check handler */ | |
c1821c2e | 1088 | S390_lowcore.program_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK; |
a45e1414 | 1089 | S390_lowcore.program_new_psw.addr = |
ab14de6c | 1090 | PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler; |
a45e1414 | 1091 | |
15e9b586 HC |
1092 | do_reset_calls(); |
1093 | } |