Commit | Line | Data |
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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 | 45 | |
615b04b3 HC |
46 | /* |
47 | * Must be in data section since the bss section | |
48 | * is not cleared when these are accessed. | |
49 | */ | |
50 | u16 ipl_devno __attribute__((__section__(".data"))) = 0; | |
51 | u32 ipl_flags __attribute__((__section__(".data"))) = 0; | |
52 | ||
ff6b8ea6 MH |
53 | static char *ipl_type_str(enum ipl_type type) |
54 | { | |
55 | switch (type) { | |
56 | case IPL_TYPE_NONE: | |
57 | return IPL_NONE_STR; | |
58 | case IPL_TYPE_CCW: | |
59 | return IPL_CCW_STR; | |
60 | case IPL_TYPE_FCP: | |
61 | return IPL_FCP_STR; | |
fe355b7f HY |
62 | case IPL_TYPE_NSS: |
63 | return IPL_NSS_STR; | |
ff6b8ea6 MH |
64 | case IPL_TYPE_UNKNOWN: |
65 | default: | |
66 | return IPL_UNKNOWN_STR; | |
67 | } | |
68 | } | |
69 | ||
70 | enum ipl_method { | |
71 | IPL_METHOD_NONE, | |
72 | IPL_METHOD_CCW_CIO, | |
73 | IPL_METHOD_CCW_DIAG, | |
74 | IPL_METHOD_CCW_VM, | |
75 | IPL_METHOD_FCP_RO_DIAG, | |
76 | IPL_METHOD_FCP_RW_DIAG, | |
77 | IPL_METHOD_FCP_RO_VM, | |
fe355b7f | 78 | IPL_METHOD_NSS, |
ff6b8ea6 MH |
79 | }; |
80 | ||
81 | enum shutdown_action { | |
82 | SHUTDOWN_REIPL, | |
83 | SHUTDOWN_DUMP, | |
84 | SHUTDOWN_STOP, | |
85 | }; | |
86 | ||
87 | #define SHUTDOWN_REIPL_STR "reipl" | |
88 | #define SHUTDOWN_DUMP_STR "dump" | |
89 | #define SHUTDOWN_STOP_STR "stop" | |
90 | ||
91 | static char *shutdown_action_str(enum shutdown_action action) | |
92 | { | |
93 | switch (action) { | |
94 | case SHUTDOWN_REIPL: | |
95 | return SHUTDOWN_REIPL_STR; | |
96 | case SHUTDOWN_DUMP: | |
97 | return SHUTDOWN_DUMP_STR; | |
98 | case SHUTDOWN_STOP: | |
99 | return SHUTDOWN_STOP_STR; | |
100 | default: | |
2b932936 | 101 | return NULL; |
ff6b8ea6 MH |
102 | } |
103 | } | |
104 | ||
ff6b8ea6 MH |
105 | static int diag308_set_works = 0; |
106 | ||
107 | static int reipl_capabilities = IPL_TYPE_UNKNOWN; | |
fe355b7f | 108 | |
ff6b8ea6 MH |
109 | static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN; |
110 | static enum ipl_method reipl_method = IPL_METHOD_NONE; | |
111 | static struct ipl_parameter_block *reipl_block_fcp; | |
112 | static struct ipl_parameter_block *reipl_block_ccw; | |
113 | ||
fe355b7f HY |
114 | static char reipl_nss_name[NSS_NAME_SIZE + 1]; |
115 | ||
ff6b8ea6 MH |
116 | static int dump_capabilities = IPL_TYPE_NONE; |
117 | static enum ipl_type dump_type = IPL_TYPE_NONE; | |
118 | static enum ipl_method dump_method = IPL_METHOD_NONE; | |
119 | static struct ipl_parameter_block *dump_block_fcp; | |
120 | static struct ipl_parameter_block *dump_block_ccw; | |
121 | ||
122 | static enum shutdown_action on_panic_action = SHUTDOWN_STOP; | |
123 | ||
46b05d26 | 124 | int diag308(unsigned long subcode, void *addr) |
ff6b8ea6 | 125 | { |
94c12cc7 | 126 | register unsigned long _addr asm("0") = (unsigned long) addr; |
ff6b8ea6 MH |
127 | register unsigned long _rc asm("1") = 0; |
128 | ||
94c12cc7 MS |
129 | asm volatile( |
130 | " diag %0,%2,0x308\n" | |
131 | "0:\n" | |
132 | EX_TABLE(0b,0b) | |
ff6b8ea6 | 133 | : "+d" (_addr), "+d" (_rc) |
94c12cc7 | 134 | : "d" (subcode) : "cc", "memory"); |
ff6b8ea6 MH |
135 | return _rc; |
136 | } | |
137 | ||
138 | /* SYSFS */ | |
139 | ||
140 | #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \ | |
141 | static ssize_t sys_##_prefix##_##_name##_show(struct subsystem *subsys, \ | |
142 | char *page) \ | |
143 | { \ | |
144 | return sprintf(page, _format, _value); \ | |
145 | } \ | |
146 | static struct subsys_attribute sys_##_prefix##_##_name##_attr = \ | |
147 | __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL); | |
148 | ||
149 | #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \ | |
150 | static ssize_t sys_##_prefix##_##_name##_show(struct subsystem *subsys, \ | |
151 | char *page) \ | |
152 | { \ | |
153 | return sprintf(page, _fmt_out, \ | |
154 | (unsigned long long) _value); \ | |
155 | } \ | |
156 | static ssize_t sys_##_prefix##_##_name##_store(struct subsystem *subsys,\ | |
157 | const char *buf, size_t len) \ | |
158 | { \ | |
159 | unsigned long long value; \ | |
160 | if (sscanf(buf, _fmt_in, &value) != 1) \ | |
161 | return -EINVAL; \ | |
162 | _value = value; \ | |
163 | return len; \ | |
164 | } \ | |
165 | static struct subsys_attribute sys_##_prefix##_##_name##_attr = \ | |
166 | __ATTR(_name,(S_IRUGO | S_IWUSR), \ | |
167 | sys_##_prefix##_##_name##_show, \ | |
168 | sys_##_prefix##_##_name##_store); | |
169 | ||
fe355b7f HY |
170 | #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\ |
171 | static ssize_t sys_##_prefix##_##_name##_show(struct subsystem *subsys, \ | |
172 | char *page) \ | |
173 | { \ | |
174 | return sprintf(page, _fmt_out, _value); \ | |
175 | } \ | |
176 | static ssize_t sys_##_prefix##_##_name##_store(struct subsystem *subsys,\ | |
177 | const char *buf, size_t len) \ | |
178 | { \ | |
179 | if (sscanf(buf, _fmt_in, _value) != 1) \ | |
180 | return -EINVAL; \ | |
181 | return len; \ | |
182 | } \ | |
183 | static struct subsys_attribute sys_##_prefix##_##_name##_attr = \ | |
184 | __ATTR(_name,(S_IRUGO | S_IWUSR), \ | |
185 | sys_##_prefix##_##_name##_show, \ | |
186 | sys_##_prefix##_##_name##_store); | |
187 | ||
ff6b8ea6 MH |
188 | static void make_attrs_ro(struct attribute **attrs) |
189 | { | |
190 | while (*attrs) { | |
191 | (*attrs)->mode = S_IRUGO; | |
192 | attrs++; | |
193 | } | |
194 | } | |
195 | ||
196 | /* | |
197 | * ipl section | |
198 | */ | |
199 | ||
200 | static enum ipl_type ipl_get_type(void) | |
201 | { | |
202 | struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START; | |
203 | ||
fe355b7f HY |
204 | if (ipl_flags & IPL_NSS_VALID) |
205 | return IPL_TYPE_NSS; | |
e87bfe51 | 206 | if (!(ipl_flags & IPL_DEVNO_VALID)) |
ff6b8ea6 | 207 | return IPL_TYPE_UNKNOWN; |
e87bfe51 | 208 | if (!(ipl_flags & IPL_PARMBLOCK_VALID)) |
ff6b8ea6 MH |
209 | return IPL_TYPE_CCW; |
210 | if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION) | |
211 | return IPL_TYPE_UNKNOWN; | |
212 | if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP) | |
213 | return IPL_TYPE_UNKNOWN; | |
214 | return IPL_TYPE_FCP; | |
215 | } | |
216 | ||
217 | static ssize_t ipl_type_show(struct subsystem *subsys, char *page) | |
218 | { | |
219 | return sprintf(page, "%s\n", ipl_type_str(ipl_get_type())); | |
220 | } | |
221 | ||
222 | static struct subsys_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type); | |
223 | ||
224 | static ssize_t sys_ipl_device_show(struct subsystem *subsys, char *page) | |
225 | { | |
226 | struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START; | |
227 | ||
228 | switch (ipl_get_type()) { | |
229 | case IPL_TYPE_CCW: | |
230 | return sprintf(page, "0.0.%04x\n", ipl_devno); | |
231 | case IPL_TYPE_FCP: | |
232 | return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno); | |
233 | default: | |
234 | return 0; | |
235 | } | |
236 | } | |
237 | ||
238 | static struct subsys_attribute sys_ipl_device_attr = | |
239 | __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL); | |
240 | ||
241 | static ssize_t ipl_parameter_read(struct kobject *kobj, char *buf, loff_t off, | |
242 | size_t count) | |
243 | { | |
244 | unsigned int size = IPL_PARMBLOCK_SIZE; | |
245 | ||
246 | if (off > size) | |
247 | return 0; | |
248 | if (off + count > size) | |
249 | count = size - off; | |
250 | memcpy(buf, (void *)IPL_PARMBLOCK_START + off, count); | |
251 | return count; | |
252 | } | |
253 | ||
254 | static struct bin_attribute ipl_parameter_attr = { | |
255 | .attr = { | |
256 | .name = "binary_parameter", | |
257 | .mode = S_IRUGO, | |
258 | .owner = THIS_MODULE, | |
259 | }, | |
260 | .size = PAGE_SIZE, | |
261 | .read = &ipl_parameter_read, | |
262 | }; | |
263 | ||
264 | static ssize_t ipl_scp_data_read(struct kobject *kobj, char *buf, loff_t off, | |
265 | size_t count) | |
266 | { | |
267 | unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len; | |
268 | void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data; | |
269 | ||
270 | if (off > size) | |
271 | return 0; | |
272 | if (off + count > size) | |
273 | count = size - off; | |
274 | memcpy(buf, scp_data + off, count); | |
275 | return count; | |
276 | } | |
277 | ||
278 | static struct bin_attribute ipl_scp_data_attr = { | |
279 | .attr = { | |
280 | .name = "scp_data", | |
281 | .mode = S_IRUGO, | |
282 | .owner = THIS_MODULE, | |
283 | }, | |
284 | .size = PAGE_SIZE, | |
285 | .read = &ipl_scp_data_read, | |
286 | }; | |
287 | ||
288 | /* FCP ipl device attributes */ | |
289 | ||
290 | DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long) | |
291 | IPL_PARMBLOCK_START->ipl_info.fcp.wwpn); | |
292 | DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long) | |
293 | IPL_PARMBLOCK_START->ipl_info.fcp.lun); | |
294 | DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long) | |
295 | IPL_PARMBLOCK_START->ipl_info.fcp.bootprog); | |
296 | DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long) | |
297 | IPL_PARMBLOCK_START->ipl_info.fcp.br_lba); | |
298 | ||
299 | static struct attribute *ipl_fcp_attrs[] = { | |
300 | &sys_ipl_type_attr.attr, | |
301 | &sys_ipl_device_attr.attr, | |
302 | &sys_ipl_fcp_wwpn_attr.attr, | |
303 | &sys_ipl_fcp_lun_attr.attr, | |
304 | &sys_ipl_fcp_bootprog_attr.attr, | |
305 | &sys_ipl_fcp_br_lba_attr.attr, | |
306 | NULL, | |
307 | }; | |
308 | ||
309 | static struct attribute_group ipl_fcp_attr_group = { | |
310 | .attrs = ipl_fcp_attrs, | |
311 | }; | |
312 | ||
313 | /* CCW ipl device attributes */ | |
314 | ||
03a4d208 MH |
315 | static ssize_t ipl_ccw_loadparm_show(struct subsystem *subsys, char *page) |
316 | { | |
317 | char loadparm[LOADPARM_LEN + 1] = {}; | |
318 | ||
319 | if (!SCCB_VALID) | |
320 | return sprintf(page, "#unknown#\n"); | |
321 | memcpy(loadparm, SCCB_LOADPARM, LOADPARM_LEN); | |
322 | EBCASC(loadparm, LOADPARM_LEN); | |
323 | strstrip(loadparm); | |
324 | return sprintf(page, "%s\n", loadparm); | |
325 | } | |
326 | ||
327 | static struct subsys_attribute sys_ipl_ccw_loadparm_attr = | |
328 | __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL); | |
329 | ||
ff6b8ea6 MH |
330 | static struct attribute *ipl_ccw_attrs[] = { |
331 | &sys_ipl_type_attr.attr, | |
332 | &sys_ipl_device_attr.attr, | |
03a4d208 | 333 | &sys_ipl_ccw_loadparm_attr.attr, |
ff6b8ea6 MH |
334 | NULL, |
335 | }; | |
336 | ||
337 | static struct attribute_group ipl_ccw_attr_group = { | |
338 | .attrs = ipl_ccw_attrs, | |
339 | }; | |
340 | ||
fe355b7f HY |
341 | /* NSS ipl device attributes */ |
342 | ||
343 | DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name); | |
344 | ||
345 | static struct attribute *ipl_nss_attrs[] = { | |
346 | &sys_ipl_type_attr.attr, | |
347 | &sys_ipl_nss_name_attr.attr, | |
348 | NULL, | |
349 | }; | |
350 | ||
351 | static struct attribute_group ipl_nss_attr_group = { | |
352 | .attrs = ipl_nss_attrs, | |
353 | }; | |
354 | ||
ff6b8ea6 MH |
355 | /* UNKNOWN ipl device attributes */ |
356 | ||
357 | static struct attribute *ipl_unknown_attrs[] = { | |
358 | &sys_ipl_type_attr.attr, | |
359 | NULL, | |
360 | }; | |
361 | ||
362 | static struct attribute_group ipl_unknown_attr_group = { | |
363 | .attrs = ipl_unknown_attrs, | |
364 | }; | |
365 | ||
366 | static decl_subsys(ipl, NULL, NULL); | |
367 | ||
368 | /* | |
369 | * reipl section | |
370 | */ | |
371 | ||
372 | /* FCP reipl device attributes */ | |
373 | ||
374 | DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n", | |
375 | reipl_block_fcp->ipl_info.fcp.wwpn); | |
376 | DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n", | |
377 | reipl_block_fcp->ipl_info.fcp.lun); | |
378 | DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n", | |
379 | reipl_block_fcp->ipl_info.fcp.bootprog); | |
380 | DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n", | |
381 | reipl_block_fcp->ipl_info.fcp.br_lba); | |
382 | DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n", | |
383 | reipl_block_fcp->ipl_info.fcp.devno); | |
384 | ||
385 | static struct attribute *reipl_fcp_attrs[] = { | |
386 | &sys_reipl_fcp_device_attr.attr, | |
387 | &sys_reipl_fcp_wwpn_attr.attr, | |
388 | &sys_reipl_fcp_lun_attr.attr, | |
389 | &sys_reipl_fcp_bootprog_attr.attr, | |
390 | &sys_reipl_fcp_br_lba_attr.attr, | |
391 | NULL, | |
392 | }; | |
393 | ||
394 | static struct attribute_group reipl_fcp_attr_group = { | |
395 | .name = IPL_FCP_STR, | |
396 | .attrs = reipl_fcp_attrs, | |
397 | }; | |
398 | ||
399 | /* CCW reipl device attributes */ | |
400 | ||
401 | DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n", | |
402 | reipl_block_ccw->ipl_info.ccw.devno); | |
403 | ||
03a4d208 MH |
404 | static void reipl_get_ascii_loadparm(char *loadparm) |
405 | { | |
406 | memcpy(loadparm, &reipl_block_ccw->ipl_info.ccw.load_param, | |
407 | LOADPARM_LEN); | |
408 | EBCASC(loadparm, LOADPARM_LEN); | |
409 | loadparm[LOADPARM_LEN] = 0; | |
410 | strstrip(loadparm); | |
411 | } | |
412 | ||
413 | static ssize_t reipl_ccw_loadparm_show(struct subsystem *subsys, char *page) | |
414 | { | |
415 | char buf[LOADPARM_LEN + 1]; | |
416 | ||
417 | reipl_get_ascii_loadparm(buf); | |
418 | return sprintf(page, "%s\n", buf); | |
419 | } | |
420 | ||
421 | static ssize_t reipl_ccw_loadparm_store(struct subsystem *subsys, | |
422 | const char *buf, size_t len) | |
423 | { | |
424 | int i, lp_len; | |
425 | ||
426 | /* ignore trailing newline */ | |
427 | lp_len = len; | |
428 | if ((len > 0) && (buf[len - 1] == '\n')) | |
429 | lp_len--; | |
430 | /* loadparm can have max 8 characters and must not start with a blank */ | |
431 | if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' '))) | |
432 | return -EINVAL; | |
433 | /* loadparm can only contain "a-z,A-Z,0-9,SP,." */ | |
434 | for (i = 0; i < lp_len; i++) { | |
435 | if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') || | |
436 | (buf[i] == '.')) | |
437 | continue; | |
438 | return -EINVAL; | |
439 | } | |
440 | /* initialize loadparm with blanks */ | |
441 | memset(&reipl_block_ccw->ipl_info.ccw.load_param, ' ', LOADPARM_LEN); | |
442 | /* copy and convert to ebcdic */ | |
443 | memcpy(&reipl_block_ccw->ipl_info.ccw.load_param, buf, lp_len); | |
444 | ASCEBC(reipl_block_ccw->ipl_info.ccw.load_param, LOADPARM_LEN); | |
445 | return len; | |
446 | } | |
447 | ||
448 | static struct subsys_attribute sys_reipl_ccw_loadparm_attr = | |
449 | __ATTR(loadparm, 0644, reipl_ccw_loadparm_show, | |
450 | reipl_ccw_loadparm_store); | |
451 | ||
ff6b8ea6 MH |
452 | static struct attribute *reipl_ccw_attrs[] = { |
453 | &sys_reipl_ccw_device_attr.attr, | |
03a4d208 | 454 | &sys_reipl_ccw_loadparm_attr.attr, |
ff6b8ea6 MH |
455 | NULL, |
456 | }; | |
457 | ||
458 | static struct attribute_group reipl_ccw_attr_group = { | |
459 | .name = IPL_CCW_STR, | |
460 | .attrs = reipl_ccw_attrs, | |
461 | }; | |
462 | ||
fe355b7f HY |
463 | |
464 | /* NSS reipl device attributes */ | |
465 | ||
466 | DEFINE_IPL_ATTR_STR_RW(reipl_nss, name, "%s\n", "%s\n", reipl_nss_name); | |
467 | ||
468 | static struct attribute *reipl_nss_attrs[] = { | |
469 | &sys_reipl_nss_name_attr.attr, | |
470 | NULL, | |
471 | }; | |
472 | ||
473 | static struct attribute_group reipl_nss_attr_group = { | |
474 | .name = IPL_NSS_STR, | |
475 | .attrs = reipl_nss_attrs, | |
476 | }; | |
477 | ||
ff6b8ea6 MH |
478 | /* reipl type */ |
479 | ||
480 | static int reipl_set_type(enum ipl_type type) | |
481 | { | |
482 | if (!(reipl_capabilities & type)) | |
483 | return -EINVAL; | |
484 | ||
485 | switch(type) { | |
486 | case IPL_TYPE_CCW: | |
487 | if (MACHINE_IS_VM) | |
488 | reipl_method = IPL_METHOD_CCW_VM; | |
489 | else | |
490 | reipl_method = IPL_METHOD_CCW_CIO; | |
491 | break; | |
492 | case IPL_TYPE_FCP: | |
493 | if (diag308_set_works) | |
494 | reipl_method = IPL_METHOD_FCP_RW_DIAG; | |
495 | else if (MACHINE_IS_VM) | |
496 | reipl_method = IPL_METHOD_FCP_RO_VM; | |
497 | else | |
498 | reipl_method = IPL_METHOD_FCP_RO_DIAG; | |
499 | break; | |
fe355b7f HY |
500 | case IPL_TYPE_NSS: |
501 | reipl_method = IPL_METHOD_NSS; | |
502 | break; | |
ff6b8ea6 MH |
503 | default: |
504 | reipl_method = IPL_METHOD_NONE; | |
505 | } | |
506 | reipl_type = type; | |
507 | return 0; | |
508 | } | |
509 | ||
510 | static ssize_t reipl_type_show(struct subsystem *subsys, char *page) | |
511 | { | |
512 | return sprintf(page, "%s\n", ipl_type_str(reipl_type)); | |
513 | } | |
514 | ||
515 | static ssize_t reipl_type_store(struct subsystem *subsys, const char *buf, | |
516 | size_t len) | |
517 | { | |
518 | int rc = -EINVAL; | |
519 | ||
520 | if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0) | |
521 | rc = reipl_set_type(IPL_TYPE_CCW); | |
522 | else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0) | |
523 | rc = reipl_set_type(IPL_TYPE_FCP); | |
fe355b7f HY |
524 | else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0) |
525 | rc = reipl_set_type(IPL_TYPE_NSS); | |
ff6b8ea6 MH |
526 | return (rc != 0) ? rc : len; |
527 | } | |
528 | ||
529 | static struct subsys_attribute reipl_type_attr = | |
530 | __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store); | |
531 | ||
532 | static decl_subsys(reipl, NULL, NULL); | |
533 | ||
534 | /* | |
535 | * dump section | |
536 | */ | |
537 | ||
538 | /* FCP dump device attributes */ | |
539 | ||
540 | DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n", | |
541 | dump_block_fcp->ipl_info.fcp.wwpn); | |
542 | DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n", | |
543 | dump_block_fcp->ipl_info.fcp.lun); | |
544 | DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n", | |
545 | dump_block_fcp->ipl_info.fcp.bootprog); | |
546 | DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n", | |
547 | dump_block_fcp->ipl_info.fcp.br_lba); | |
548 | DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n", | |
549 | dump_block_fcp->ipl_info.fcp.devno); | |
550 | ||
551 | static struct attribute *dump_fcp_attrs[] = { | |
552 | &sys_dump_fcp_device_attr.attr, | |
553 | &sys_dump_fcp_wwpn_attr.attr, | |
554 | &sys_dump_fcp_lun_attr.attr, | |
555 | &sys_dump_fcp_bootprog_attr.attr, | |
556 | &sys_dump_fcp_br_lba_attr.attr, | |
557 | NULL, | |
558 | }; | |
559 | ||
560 | static struct attribute_group dump_fcp_attr_group = { | |
561 | .name = IPL_FCP_STR, | |
562 | .attrs = dump_fcp_attrs, | |
563 | }; | |
564 | ||
565 | /* CCW dump device attributes */ | |
566 | ||
567 | DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n", | |
568 | dump_block_ccw->ipl_info.ccw.devno); | |
569 | ||
570 | static struct attribute *dump_ccw_attrs[] = { | |
571 | &sys_dump_ccw_device_attr.attr, | |
572 | NULL, | |
573 | }; | |
574 | ||
575 | static struct attribute_group dump_ccw_attr_group = { | |
576 | .name = IPL_CCW_STR, | |
577 | .attrs = dump_ccw_attrs, | |
578 | }; | |
579 | ||
580 | /* dump type */ | |
581 | ||
582 | static int dump_set_type(enum ipl_type type) | |
583 | { | |
584 | if (!(dump_capabilities & type)) | |
585 | return -EINVAL; | |
586 | switch(type) { | |
587 | case IPL_TYPE_CCW: | |
588 | if (MACHINE_IS_VM) | |
589 | dump_method = IPL_METHOD_CCW_VM; | |
590 | else | |
591 | dump_method = IPL_METHOD_CCW_CIO; | |
592 | break; | |
593 | case IPL_TYPE_FCP: | |
594 | dump_method = IPL_METHOD_FCP_RW_DIAG; | |
595 | break; | |
596 | default: | |
597 | dump_method = IPL_METHOD_NONE; | |
598 | } | |
599 | dump_type = type; | |
600 | return 0; | |
601 | } | |
602 | ||
603 | static ssize_t dump_type_show(struct subsystem *subsys, char *page) | |
604 | { | |
605 | return sprintf(page, "%s\n", ipl_type_str(dump_type)); | |
606 | } | |
607 | ||
608 | static ssize_t dump_type_store(struct subsystem *subsys, const char *buf, | |
609 | size_t len) | |
610 | { | |
611 | int rc = -EINVAL; | |
612 | ||
613 | if (strncmp(buf, IPL_NONE_STR, strlen(IPL_NONE_STR)) == 0) | |
614 | rc = dump_set_type(IPL_TYPE_NONE); | |
615 | else if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0) | |
616 | rc = dump_set_type(IPL_TYPE_CCW); | |
617 | else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0) | |
618 | rc = dump_set_type(IPL_TYPE_FCP); | |
619 | return (rc != 0) ? rc : len; | |
620 | } | |
621 | ||
622 | static struct subsys_attribute dump_type_attr = | |
623 | __ATTR(dump_type, 0644, dump_type_show, dump_type_store); | |
624 | ||
625 | static decl_subsys(dump, NULL, NULL); | |
626 | ||
ff6b8ea6 MH |
627 | /* |
628 | * Shutdown actions section | |
629 | */ | |
630 | ||
631 | static decl_subsys(shutdown_actions, NULL, NULL); | |
632 | ||
633 | /* on panic */ | |
634 | ||
635 | static ssize_t on_panic_show(struct subsystem *subsys, char *page) | |
636 | { | |
637 | return sprintf(page, "%s\n", shutdown_action_str(on_panic_action)); | |
638 | } | |
639 | ||
640 | static ssize_t on_panic_store(struct subsystem *subsys, const char *buf, | |
641 | size_t len) | |
642 | { | |
643 | if (strncmp(buf, SHUTDOWN_REIPL_STR, strlen(SHUTDOWN_REIPL_STR)) == 0) | |
644 | on_panic_action = SHUTDOWN_REIPL; | |
645 | else if (strncmp(buf, SHUTDOWN_DUMP_STR, | |
646 | strlen(SHUTDOWN_DUMP_STR)) == 0) | |
647 | on_panic_action = SHUTDOWN_DUMP; | |
648 | else if (strncmp(buf, SHUTDOWN_STOP_STR, | |
649 | strlen(SHUTDOWN_STOP_STR)) == 0) | |
650 | on_panic_action = SHUTDOWN_STOP; | |
651 | else | |
652 | return -EINVAL; | |
653 | ||
654 | return len; | |
655 | } | |
656 | ||
657 | static struct subsys_attribute on_panic_attr = | |
658 | __ATTR(on_panic, 0644, on_panic_show, on_panic_store); | |
659 | ||
ff6b8ea6 MH |
660 | void do_reipl(void) |
661 | { | |
662 | struct ccw_dev_id devid; | |
663 | static char buf[100]; | |
03a4d208 | 664 | char loadparm[LOADPARM_LEN + 1]; |
ff6b8ea6 | 665 | |
ff6b8ea6 MH |
666 | switch (reipl_method) { |
667 | case IPL_METHOD_CCW_CIO: | |
668 | devid.devno = reipl_block_ccw->ipl_info.ccw.devno; | |
5986b0e8 MH |
669 | if (ipl_get_type() == IPL_TYPE_CCW && devid.devno == ipl_devno) |
670 | diag308(DIAG308_IPL, NULL); | |
ff6b8ea6 MH |
671 | devid.ssid = 0; |
672 | reipl_ccw_dev(&devid); | |
673 | break; | |
674 | case IPL_METHOD_CCW_VM: | |
58be9441 | 675 | reipl_get_ascii_loadparm(loadparm); |
03a4d208 MH |
676 | if (strlen(loadparm) == 0) |
677 | sprintf(buf, "IPL %X", | |
678 | reipl_block_ccw->ipl_info.ccw.devno); | |
679 | else | |
680 | sprintf(buf, "IPL %X LOADPARM '%s'", | |
681 | reipl_block_ccw->ipl_info.ccw.devno, loadparm); | |
740b5706 | 682 | __cpcmd(buf, NULL, 0, NULL); |
ff6b8ea6 MH |
683 | break; |
684 | case IPL_METHOD_CCW_DIAG: | |
685 | diag308(DIAG308_SET, reipl_block_ccw); | |
686 | diag308(DIAG308_IPL, NULL); | |
687 | break; | |
688 | case IPL_METHOD_FCP_RW_DIAG: | |
689 | diag308(DIAG308_SET, reipl_block_fcp); | |
690 | diag308(DIAG308_IPL, NULL); | |
691 | break; | |
692 | case IPL_METHOD_FCP_RO_DIAG: | |
693 | diag308(DIAG308_IPL, NULL); | |
694 | break; | |
695 | case IPL_METHOD_FCP_RO_VM: | |
740b5706 | 696 | __cpcmd("IPL", NULL, 0, NULL); |
ff6b8ea6 | 697 | break; |
fe355b7f HY |
698 | case IPL_METHOD_NSS: |
699 | sprintf(buf, "IPL %s", reipl_nss_name); | |
700 | __cpcmd(buf, NULL, 0, NULL); | |
701 | break; | |
ff6b8ea6 MH |
702 | case IPL_METHOD_NONE: |
703 | default: | |
704 | if (MACHINE_IS_VM) | |
740b5706 | 705 | __cpcmd("IPL", NULL, 0, NULL); |
ff6b8ea6 MH |
706 | diag308(DIAG308_IPL, NULL); |
707 | break; | |
708 | } | |
3902e476 | 709 | signal_processor(smp_processor_id(), sigp_stop_and_store_status); |
ff6b8ea6 MH |
710 | } |
711 | ||
712 | static void do_dump(void) | |
713 | { | |
714 | struct ccw_dev_id devid; | |
715 | static char buf[100]; | |
716 | ||
ff6b8ea6 MH |
717 | switch (dump_method) { |
718 | case IPL_METHOD_CCW_CIO: | |
c6b5b847 | 719 | smp_send_stop(); |
ff6b8ea6 MH |
720 | devid.devno = dump_block_ccw->ipl_info.ccw.devno; |
721 | devid.ssid = 0; | |
722 | reipl_ccw_dev(&devid); | |
723 | break; | |
724 | case IPL_METHOD_CCW_VM: | |
c6b5b847 | 725 | smp_send_stop(); |
ff6b8ea6 | 726 | sprintf(buf, "STORE STATUS"); |
740b5706 | 727 | __cpcmd(buf, NULL, 0, NULL); |
ff6b8ea6 | 728 | sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno); |
740b5706 | 729 | __cpcmd(buf, NULL, 0, NULL); |
ff6b8ea6 MH |
730 | break; |
731 | case IPL_METHOD_CCW_DIAG: | |
732 | diag308(DIAG308_SET, dump_block_ccw); | |
733 | diag308(DIAG308_DUMP, NULL); | |
734 | break; | |
735 | case IPL_METHOD_FCP_RW_DIAG: | |
736 | diag308(DIAG308_SET, dump_block_fcp); | |
737 | diag308(DIAG308_DUMP, NULL); | |
738 | break; | |
739 | case IPL_METHOD_NONE: | |
740 | default: | |
741 | return; | |
742 | } | |
743 | printk(KERN_EMERG "Dump failed!\n"); | |
744 | } | |
745 | ||
746 | /* init functions */ | |
747 | ||
748 | static int __init ipl_register_fcp_files(void) | |
749 | { | |
750 | int rc; | |
751 | ||
752 | rc = sysfs_create_group(&ipl_subsys.kset.kobj, | |
753 | &ipl_fcp_attr_group); | |
754 | if (rc) | |
755 | goto out; | |
756 | rc = sysfs_create_bin_file(&ipl_subsys.kset.kobj, | |
757 | &ipl_parameter_attr); | |
758 | if (rc) | |
759 | goto out_ipl_parm; | |
760 | rc = sysfs_create_bin_file(&ipl_subsys.kset.kobj, | |
761 | &ipl_scp_data_attr); | |
762 | if (!rc) | |
763 | goto out; | |
764 | ||
765 | sysfs_remove_bin_file(&ipl_subsys.kset.kobj, &ipl_parameter_attr); | |
766 | ||
767 | out_ipl_parm: | |
768 | sysfs_remove_group(&ipl_subsys.kset.kobj, &ipl_fcp_attr_group); | |
769 | out: | |
770 | return rc; | |
771 | } | |
772 | ||
773 | static int __init ipl_init(void) | |
774 | { | |
775 | int rc; | |
776 | ||
777 | rc = firmware_register(&ipl_subsys); | |
778 | if (rc) | |
779 | return rc; | |
780 | switch (ipl_get_type()) { | |
781 | case IPL_TYPE_CCW: | |
782 | rc = sysfs_create_group(&ipl_subsys.kset.kobj, | |
783 | &ipl_ccw_attr_group); | |
784 | break; | |
785 | case IPL_TYPE_FCP: | |
786 | rc = ipl_register_fcp_files(); | |
787 | break; | |
fe355b7f HY |
788 | case IPL_TYPE_NSS: |
789 | rc = sysfs_create_group(&ipl_subsys.kset.kobj, | |
790 | &ipl_nss_attr_group); | |
791 | break; | |
ff6b8ea6 MH |
792 | default: |
793 | rc = sysfs_create_group(&ipl_subsys.kset.kobj, | |
794 | &ipl_unknown_attr_group); | |
795 | break; | |
796 | } | |
797 | if (rc) | |
798 | firmware_unregister(&ipl_subsys); | |
799 | return rc; | |
800 | } | |
801 | ||
802 | static void __init reipl_probe(void) | |
803 | { | |
804 | void *buffer; | |
805 | ||
806 | buffer = (void *) get_zeroed_page(GFP_KERNEL); | |
807 | if (!buffer) | |
808 | return; | |
809 | if (diag308(DIAG308_STORE, buffer) == DIAG308_RC_OK) | |
810 | diag308_set_works = 1; | |
811 | free_page((unsigned long)buffer); | |
812 | } | |
813 | ||
fe355b7f HY |
814 | static int __init reipl_nss_init(void) |
815 | { | |
816 | int rc; | |
817 | ||
818 | if (!MACHINE_IS_VM) | |
819 | return 0; | |
820 | rc = sysfs_create_group(&reipl_subsys.kset.kobj, &reipl_nss_attr_group); | |
821 | if (rc) | |
822 | return rc; | |
823 | strncpy(reipl_nss_name, kernel_nss_name, NSS_NAME_SIZE + 1); | |
824 | reipl_capabilities |= IPL_TYPE_NSS; | |
825 | return 0; | |
826 | } | |
827 | ||
ff6b8ea6 MH |
828 | static int __init reipl_ccw_init(void) |
829 | { | |
830 | int rc; | |
831 | ||
832 | reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL); | |
833 | if (!reipl_block_ccw) | |
834 | return -ENOMEM; | |
835 | rc = sysfs_create_group(&reipl_subsys.kset.kobj, &reipl_ccw_attr_group); | |
836 | if (rc) { | |
837 | free_page((unsigned long)reipl_block_ccw); | |
838 | return rc; | |
839 | } | |
840 | reipl_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN; | |
841 | reipl_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION; | |
fbb04f38 | 842 | reipl_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN; |
ff6b8ea6 | 843 | reipl_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW; |
03a4d208 MH |
844 | /* check if read scp info worked and set loadparm */ |
845 | if (SCCB_VALID) | |
846 | memcpy(reipl_block_ccw->ipl_info.ccw.load_param, | |
847 | SCCB_LOADPARM, LOADPARM_LEN); | |
848 | else | |
849 | /* read scp info failed: set empty loadparm (EBCDIC blanks) */ | |
850 | memset(reipl_block_ccw->ipl_info.ccw.load_param, 0x40, | |
851 | LOADPARM_LEN); | |
852 | /* FIXME: check for diag308_set_works when enabling diag ccw reipl */ | |
853 | if (!MACHINE_IS_VM) | |
854 | sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO; | |
ff6b8ea6 MH |
855 | if (ipl_get_type() == IPL_TYPE_CCW) |
856 | reipl_block_ccw->ipl_info.ccw.devno = ipl_devno; | |
857 | reipl_capabilities |= IPL_TYPE_CCW; | |
858 | return 0; | |
859 | } | |
860 | ||
861 | static int __init reipl_fcp_init(void) | |
862 | { | |
863 | int rc; | |
864 | ||
865 | if ((!diag308_set_works) && (ipl_get_type() != IPL_TYPE_FCP)) | |
866 | return 0; | |
867 | if ((!diag308_set_works) && (ipl_get_type() == IPL_TYPE_FCP)) | |
868 | make_attrs_ro(reipl_fcp_attrs); | |
869 | ||
870 | reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL); | |
871 | if (!reipl_block_fcp) | |
872 | return -ENOMEM; | |
873 | rc = sysfs_create_group(&reipl_subsys.kset.kobj, &reipl_fcp_attr_group); | |
874 | if (rc) { | |
875 | free_page((unsigned long)reipl_block_fcp); | |
876 | return rc; | |
877 | } | |
878 | if (ipl_get_type() == IPL_TYPE_FCP) { | |
879 | memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE); | |
880 | } else { | |
881 | reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN; | |
882 | reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION; | |
fbb04f38 | 883 | reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN; |
ff6b8ea6 MH |
884 | reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP; |
885 | reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL; | |
886 | } | |
887 | reipl_capabilities |= IPL_TYPE_FCP; | |
888 | return 0; | |
889 | } | |
890 | ||
891 | static int __init reipl_init(void) | |
892 | { | |
893 | int rc; | |
894 | ||
895 | rc = firmware_register(&reipl_subsys); | |
896 | if (rc) | |
897 | return rc; | |
898 | rc = subsys_create_file(&reipl_subsys, &reipl_type_attr); | |
899 | if (rc) { | |
900 | firmware_unregister(&reipl_subsys); | |
901 | return rc; | |
902 | } | |
903 | rc = reipl_ccw_init(); | |
904 | if (rc) | |
905 | return rc; | |
906 | rc = reipl_fcp_init(); | |
fe355b7f HY |
907 | if (rc) |
908 | return rc; | |
909 | rc = reipl_nss_init(); | |
ff6b8ea6 MH |
910 | if (rc) |
911 | return rc; | |
912 | rc = reipl_set_type(ipl_get_type()); | |
913 | if (rc) | |
914 | return rc; | |
915 | return 0; | |
916 | } | |
917 | ||
918 | static int __init dump_ccw_init(void) | |
919 | { | |
920 | int rc; | |
921 | ||
922 | dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL); | |
923 | if (!dump_block_ccw) | |
924 | return -ENOMEM; | |
925 | rc = sysfs_create_group(&dump_subsys.kset.kobj, &dump_ccw_attr_group); | |
926 | if (rc) { | |
927 | free_page((unsigned long)dump_block_ccw); | |
928 | return rc; | |
929 | } | |
930 | dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN; | |
931 | dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION; | |
fbb04f38 | 932 | dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN; |
ff6b8ea6 MH |
933 | dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW; |
934 | dump_capabilities |= IPL_TYPE_CCW; | |
935 | return 0; | |
936 | } | |
937 | ||
ff6b8ea6 MH |
938 | static int __init dump_fcp_init(void) |
939 | { | |
940 | int rc; | |
941 | ||
03a4d208 | 942 | if(!(SCCB_FLAG & 0x2) || !SCCB_VALID) |
ff6b8ea6 MH |
943 | return 0; /* LDIPL DUMP is not installed */ |
944 | if (!diag308_set_works) | |
945 | return 0; | |
946 | dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL); | |
947 | if (!dump_block_fcp) | |
948 | return -ENOMEM; | |
949 | rc = sysfs_create_group(&dump_subsys.kset.kobj, &dump_fcp_attr_group); | |
950 | if (rc) { | |
951 | free_page((unsigned long)dump_block_fcp); | |
952 | return rc; | |
953 | } | |
954 | dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN; | |
955 | dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION; | |
fbb04f38 | 956 | dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN; |
ff6b8ea6 MH |
957 | dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP; |
958 | dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP; | |
959 | dump_capabilities |= IPL_TYPE_FCP; | |
960 | return 0; | |
961 | } | |
962 | ||
963 | #define SHUTDOWN_ON_PANIC_PRIO 0 | |
964 | ||
965 | static int shutdown_on_panic_notify(struct notifier_block *self, | |
966 | unsigned long event, void *data) | |
967 | { | |
968 | if (on_panic_action == SHUTDOWN_DUMP) | |
969 | do_dump(); | |
970 | else if (on_panic_action == SHUTDOWN_REIPL) | |
971 | do_reipl(); | |
972 | return NOTIFY_OK; | |
973 | } | |
974 | ||
975 | static struct notifier_block shutdown_on_panic_nb = { | |
976 | .notifier_call = shutdown_on_panic_notify, | |
977 | .priority = SHUTDOWN_ON_PANIC_PRIO | |
978 | }; | |
979 | ||
980 | static int __init dump_init(void) | |
981 | { | |
982 | int rc; | |
983 | ||
984 | rc = firmware_register(&dump_subsys); | |
985 | if (rc) | |
986 | return rc; | |
987 | rc = subsys_create_file(&dump_subsys, &dump_type_attr); | |
988 | if (rc) { | |
989 | firmware_unregister(&dump_subsys); | |
990 | return rc; | |
991 | } | |
992 | rc = dump_ccw_init(); | |
993 | if (rc) | |
994 | return rc; | |
995 | rc = dump_fcp_init(); | |
996 | if (rc) | |
997 | return rc; | |
998 | dump_set_type(IPL_TYPE_NONE); | |
999 | return 0; | |
1000 | } | |
1001 | ||
1002 | static int __init shutdown_actions_init(void) | |
1003 | { | |
1004 | int rc; | |
1005 | ||
1006 | rc = firmware_register(&shutdown_actions_subsys); | |
1007 | if (rc) | |
1008 | return rc; | |
1009 | rc = subsys_create_file(&shutdown_actions_subsys, &on_panic_attr); | |
1010 | if (rc) { | |
1011 | firmware_unregister(&shutdown_actions_subsys); | |
1012 | return rc; | |
1013 | } | |
1014 | atomic_notifier_chain_register(&panic_notifier_list, | |
1015 | &shutdown_on_panic_nb); | |
1016 | return 0; | |
1017 | } | |
1018 | ||
1019 | static int __init s390_ipl_init(void) | |
1020 | { | |
1021 | int rc; | |
1022 | ||
1023 | reipl_probe(); | |
1024 | rc = ipl_init(); | |
1025 | if (rc) | |
1026 | return rc; | |
1027 | rc = reipl_init(); | |
1028 | if (rc) | |
1029 | return rc; | |
1030 | rc = dump_init(); | |
1031 | if (rc) | |
1032 | return rc; | |
1033 | rc = shutdown_actions_init(); | |
1034 | if (rc) | |
1035 | return rc; | |
1036 | return 0; | |
1037 | } | |
1038 | ||
1039 | __initcall(s390_ipl_init); | |
15e9b586 HC |
1040 | |
1041 | static LIST_HEAD(rcall); | |
1042 | static DEFINE_MUTEX(rcall_mutex); | |
1043 | ||
1044 | void register_reset_call(struct reset_call *reset) | |
1045 | { | |
1046 | mutex_lock(&rcall_mutex); | |
1047 | list_add(&reset->list, &rcall); | |
1048 | mutex_unlock(&rcall_mutex); | |
1049 | } | |
1050 | EXPORT_SYMBOL_GPL(register_reset_call); | |
1051 | ||
1052 | void unregister_reset_call(struct reset_call *reset) | |
1053 | { | |
1054 | mutex_lock(&rcall_mutex); | |
1055 | list_del(&reset->list); | |
1056 | mutex_unlock(&rcall_mutex); | |
1057 | } | |
1058 | EXPORT_SYMBOL_GPL(unregister_reset_call); | |
1059 | ||
1060 | static void do_reset_calls(void) | |
1061 | { | |
1062 | struct reset_call *reset; | |
1063 | ||
1064 | list_for_each_entry(reset, &rcall, list) | |
1065 | reset->fn(); | |
1066 | } | |
1067 | ||
c5dd8586 | 1068 | u32 dump_prefix_page; |
15e9b586 HC |
1069 | |
1070 | void s390_reset_system(void) | |
1071 | { | |
1072 | struct _lowcore *lc; | |
1073 | ||
15e9b586 | 1074 | lc = (struct _lowcore *)(unsigned long) store_prefix(); |
a45e1414 MH |
1075 | |
1076 | /* Stack for interrupt/machine check handler */ | |
15e9b586 HC |
1077 | lc->panic_stack = S390_lowcore.panic_stack; |
1078 | ||
da1cf23e | 1079 | /* Save prefix page address for dump case */ |
c5dd8586 | 1080 | dump_prefix_page = (u32)(unsigned long) lc; |
da1cf23e | 1081 | |
15e9b586 HC |
1082 | /* Disable prefixing */ |
1083 | set_prefix(0); | |
1084 | ||
1085 | /* Disable lowcore protection */ | |
1086 | __ctl_clear_bit(0,28); | |
1087 | ||
1088 | /* Set new machine check handler */ | |
c1821c2e | 1089 | S390_lowcore.mcck_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK; |
15e9b586 | 1090 | S390_lowcore.mcck_new_psw.addr = |
ab14de6c | 1091 | PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler; |
a45e1414 MH |
1092 | |
1093 | /* Set new program check handler */ | |
c1821c2e | 1094 | S390_lowcore.program_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK; |
a45e1414 | 1095 | S390_lowcore.program_new_psw.addr = |
ab14de6c | 1096 | PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler; |
a45e1414 | 1097 | |
15e9b586 HC |
1098 | do_reset_calls(); |
1099 | } |