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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 | * | |
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> |
0788fea4 | 17 | #include <linux/fs.h> |
46b05d26 | 18 | #include <asm/ipl.h> |
ff6b8ea6 MH |
19 | #include <asm/smp.h> |
20 | #include <asm/setup.h> | |
21 | #include <asm/cpcmd.h> | |
22 | #include <asm/cio.h> | |
03a4d208 | 23 | #include <asm/ebcdic.h> |
15e9b586 | 24 | #include <asm/reset.h> |
ab14de6c | 25 | #include <asm/sclp.h> |
3bd5f3ef | 26 | #include <asm/sigp.h> |
159d1ff8 | 27 | #include <asm/checksum.h> |
ff6b8ea6 MH |
28 | |
29 | #define IPL_PARM_BLOCK_VERSION 0 | |
03a4d208 | 30 | |
411ed322 MH |
31 | #define IPL_UNKNOWN_STR "unknown" |
32 | #define IPL_CCW_STR "ccw" | |
33 | #define IPL_FCP_STR "fcp" | |
34 | #define IPL_FCP_DUMP_STR "fcp_dump" | |
35 | #define IPL_NSS_STR "nss" | |
615b04b3 | 36 | |
99ca4e58 MH |
37 | #define DUMP_CCW_STR "ccw" |
38 | #define DUMP_FCP_STR "fcp" | |
39 | #define DUMP_NONE_STR "none" | |
40 | ||
41 | /* | |
42 | * Four shutdown trigger types are supported: | |
43 | * - panic | |
44 | * - halt | |
45 | * - power off | |
46 | * - reipl | |
47 | */ | |
48 | #define ON_PANIC_STR "on_panic" | |
49 | #define ON_HALT_STR "on_halt" | |
50 | #define ON_POFF_STR "on_poff" | |
51 | #define ON_REIPL_STR "on_reboot" | |
52 | ||
53 | struct shutdown_action; | |
54 | struct shutdown_trigger { | |
55 | char *name; | |
56 | struct shutdown_action *action; | |
57 | }; | |
58 | ||
59 | /* | |
099b7651 | 60 | * The following shutdown action types are supported: |
99ca4e58 MH |
61 | */ |
62 | #define SHUTDOWN_ACTION_IPL_STR "ipl" | |
63 | #define SHUTDOWN_ACTION_REIPL_STR "reipl" | |
64 | #define SHUTDOWN_ACTION_DUMP_STR "dump" | |
65 | #define SHUTDOWN_ACTION_VMCMD_STR "vmcmd" | |
66 | #define SHUTDOWN_ACTION_STOP_STR "stop" | |
099b7651 | 67 | #define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl" |
99ca4e58 MH |
68 | |
69 | struct shutdown_action { | |
70 | char *name; | |
71 | void (*fn) (struct shutdown_trigger *trigger); | |
72 | int (*init) (void); | |
73 | }; | |
74 | ||
ff6b8ea6 MH |
75 | static char *ipl_type_str(enum ipl_type type) |
76 | { | |
77 | switch (type) { | |
ff6b8ea6 MH |
78 | case IPL_TYPE_CCW: |
79 | return IPL_CCW_STR; | |
80 | case IPL_TYPE_FCP: | |
81 | return IPL_FCP_STR; | |
411ed322 MH |
82 | case IPL_TYPE_FCP_DUMP: |
83 | return IPL_FCP_DUMP_STR; | |
fe355b7f HY |
84 | case IPL_TYPE_NSS: |
85 | return IPL_NSS_STR; | |
ff6b8ea6 MH |
86 | case IPL_TYPE_UNKNOWN: |
87 | default: | |
88 | return IPL_UNKNOWN_STR; | |
89 | } | |
90 | } | |
91 | ||
411ed322 MH |
92 | enum dump_type { |
93 | DUMP_TYPE_NONE = 1, | |
94 | DUMP_TYPE_CCW = 2, | |
95 | DUMP_TYPE_FCP = 4, | |
96 | }; | |
97 | ||
411ed322 MH |
98 | static char *dump_type_str(enum dump_type type) |
99 | { | |
100 | switch (type) { | |
101 | case DUMP_TYPE_NONE: | |
102 | return DUMP_NONE_STR; | |
103 | case DUMP_TYPE_CCW: | |
104 | return DUMP_CCW_STR; | |
105 | case DUMP_TYPE_FCP: | |
106 | return DUMP_FCP_STR; | |
107 | default: | |
108 | return NULL; | |
109 | } | |
110 | } | |
111 | ||
112 | /* | |
113 | * Must be in data section since the bss section | |
114 | * is not cleared when these are accessed. | |
115 | */ | |
116 | static u16 ipl_devno __attribute__((__section__(".data"))) = 0; | |
117 | u32 ipl_flags __attribute__((__section__(".data"))) = 0; | |
118 | ||
ff6b8ea6 | 119 | enum ipl_method { |
411ed322 MH |
120 | REIPL_METHOD_CCW_CIO, |
121 | REIPL_METHOD_CCW_DIAG, | |
122 | REIPL_METHOD_CCW_VM, | |
123 | REIPL_METHOD_FCP_RO_DIAG, | |
124 | REIPL_METHOD_FCP_RW_DIAG, | |
125 | REIPL_METHOD_FCP_RO_VM, | |
126 | REIPL_METHOD_FCP_DUMP, | |
127 | REIPL_METHOD_NSS, | |
a0443fbb | 128 | REIPL_METHOD_NSS_DIAG, |
411ed322 MH |
129 | REIPL_METHOD_DEFAULT, |
130 | }; | |
131 | ||
132 | enum dump_method { | |
133 | DUMP_METHOD_NONE, | |
134 | DUMP_METHOD_CCW_CIO, | |
135 | DUMP_METHOD_CCW_DIAG, | |
136 | DUMP_METHOD_CCW_VM, | |
137 | DUMP_METHOD_FCP_DIAG, | |
ff6b8ea6 MH |
138 | }; |
139 | ||
ff6b8ea6 MH |
140 | static int diag308_set_works = 0; |
141 | ||
a0443fbb HB |
142 | static struct ipl_parameter_block ipl_block; |
143 | ||
ff6b8ea6 | 144 | static int reipl_capabilities = IPL_TYPE_UNKNOWN; |
fe355b7f | 145 | |
ff6b8ea6 | 146 | static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN; |
411ed322 | 147 | static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT; |
ff6b8ea6 MH |
148 | static struct ipl_parameter_block *reipl_block_fcp; |
149 | static struct ipl_parameter_block *reipl_block_ccw; | |
a0443fbb | 150 | static struct ipl_parameter_block *reipl_block_nss; |
099b7651 | 151 | static struct ipl_parameter_block *reipl_block_actual; |
fe355b7f | 152 | |
411ed322 MH |
153 | static int dump_capabilities = DUMP_TYPE_NONE; |
154 | static enum dump_type dump_type = DUMP_TYPE_NONE; | |
155 | static enum dump_method dump_method = DUMP_METHOD_NONE; | |
ff6b8ea6 MH |
156 | static struct ipl_parameter_block *dump_block_fcp; |
157 | static struct ipl_parameter_block *dump_block_ccw; | |
158 | ||
05dd2530 HC |
159 | static struct sclp_ipl_info sclp_ipl_info; |
160 | ||
46b05d26 | 161 | int diag308(unsigned long subcode, void *addr) |
ff6b8ea6 | 162 | { |
94c12cc7 | 163 | register unsigned long _addr asm("0") = (unsigned long) addr; |
ff6b8ea6 MH |
164 | register unsigned long _rc asm("1") = 0; |
165 | ||
94c12cc7 MS |
166 | asm volatile( |
167 | " diag %0,%2,0x308\n" | |
168 | "0:\n" | |
169 | EX_TABLE(0b,0b) | |
ff6b8ea6 | 170 | : "+d" (_addr), "+d" (_rc) |
94c12cc7 | 171 | : "d" (subcode) : "cc", "memory"); |
ff6b8ea6 MH |
172 | return _rc; |
173 | } | |
411ed322 | 174 | EXPORT_SYMBOL_GPL(diag308); |
ff6b8ea6 MH |
175 | |
176 | /* SYSFS */ | |
177 | ||
178 | #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \ | |
9b949165 GKH |
179 | static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \ |
180 | struct kobj_attribute *attr, \ | |
ff6b8ea6 MH |
181 | char *page) \ |
182 | { \ | |
183 | return sprintf(page, _format, _value); \ | |
184 | } \ | |
9b949165 | 185 | static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ |
ff6b8ea6 MH |
186 | __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL); |
187 | ||
188 | #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \ | |
9b949165 GKH |
189 | static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \ |
190 | struct kobj_attribute *attr, \ | |
ff6b8ea6 MH |
191 | char *page) \ |
192 | { \ | |
193 | return sprintf(page, _fmt_out, \ | |
194 | (unsigned long long) _value); \ | |
195 | } \ | |
9b949165 GKH |
196 | static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \ |
197 | struct kobj_attribute *attr, \ | |
ff6b8ea6 MH |
198 | const char *buf, size_t len) \ |
199 | { \ | |
200 | unsigned long long value; \ | |
201 | if (sscanf(buf, _fmt_in, &value) != 1) \ | |
202 | return -EINVAL; \ | |
203 | _value = value; \ | |
204 | return len; \ | |
205 | } \ | |
9b949165 | 206 | static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ |
ff6b8ea6 MH |
207 | __ATTR(_name,(S_IRUGO | S_IWUSR), \ |
208 | sys_##_prefix##_##_name##_show, \ | |
209 | sys_##_prefix##_##_name##_store); | |
210 | ||
fe355b7f | 211 | #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\ |
9b949165 GKH |
212 | static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \ |
213 | struct kobj_attribute *attr, \ | |
fe355b7f HY |
214 | char *page) \ |
215 | { \ | |
216 | return sprintf(page, _fmt_out, _value); \ | |
217 | } \ | |
9b949165 GKH |
218 | static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \ |
219 | struct kobj_attribute *attr, \ | |
fe355b7f HY |
220 | const char *buf, size_t len) \ |
221 | { \ | |
99ca4e58 MH |
222 | strncpy(_value, buf, sizeof(_value) - 1); \ |
223 | strstrip(_value); \ | |
fe355b7f HY |
224 | return len; \ |
225 | } \ | |
9b949165 | 226 | static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ |
fe355b7f HY |
227 | __ATTR(_name,(S_IRUGO | S_IWUSR), \ |
228 | sys_##_prefix##_##_name##_show, \ | |
229 | sys_##_prefix##_##_name##_store); | |
230 | ||
ff6b8ea6 MH |
231 | static void make_attrs_ro(struct attribute **attrs) |
232 | { | |
233 | while (*attrs) { | |
234 | (*attrs)->mode = S_IRUGO; | |
235 | attrs++; | |
236 | } | |
237 | } | |
238 | ||
239 | /* | |
240 | * ipl section | |
241 | */ | |
242 | ||
411ed322 | 243 | static __init enum ipl_type get_ipl_type(void) |
ff6b8ea6 MH |
244 | { |
245 | struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START; | |
246 | ||
fe355b7f HY |
247 | if (ipl_flags & IPL_NSS_VALID) |
248 | return IPL_TYPE_NSS; | |
e87bfe51 | 249 | if (!(ipl_flags & IPL_DEVNO_VALID)) |
ff6b8ea6 | 250 | return IPL_TYPE_UNKNOWN; |
e87bfe51 | 251 | if (!(ipl_flags & IPL_PARMBLOCK_VALID)) |
ff6b8ea6 MH |
252 | return IPL_TYPE_CCW; |
253 | if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION) | |
254 | return IPL_TYPE_UNKNOWN; | |
255 | if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP) | |
256 | return IPL_TYPE_UNKNOWN; | |
411ed322 MH |
257 | if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP) |
258 | return IPL_TYPE_FCP_DUMP; | |
ff6b8ea6 MH |
259 | return IPL_TYPE_FCP; |
260 | } | |
261 | ||
411ed322 MH |
262 | struct ipl_info ipl_info; |
263 | EXPORT_SYMBOL_GPL(ipl_info); | |
264 | ||
9b949165 GKH |
265 | static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr, |
266 | char *page) | |
ff6b8ea6 | 267 | { |
411ed322 | 268 | return sprintf(page, "%s\n", ipl_type_str(ipl_info.type)); |
ff6b8ea6 MH |
269 | } |
270 | ||
9b949165 | 271 | static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type); |
ff6b8ea6 | 272 | |
a0443fbb HB |
273 | /* VM IPL PARM routines */ |
274 | static void reipl_get_ascii_vmparm(char *dest, | |
275 | const struct ipl_parameter_block *ipb) | |
276 | { | |
277 | int i; | |
278 | int len = 0; | |
279 | char has_lowercase = 0; | |
280 | ||
281 | if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) && | |
282 | (ipb->ipl_info.ccw.vm_parm_len > 0)) { | |
283 | ||
284 | len = ipb->ipl_info.ccw.vm_parm_len; | |
285 | memcpy(dest, ipb->ipl_info.ccw.vm_parm, len); | |
286 | /* If at least one character is lowercase, we assume mixed | |
287 | * case; otherwise we convert everything to lowercase. | |
288 | */ | |
289 | for (i = 0; i < len; i++) | |
290 | if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */ | |
291 | (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */ | |
292 | (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */ | |
293 | has_lowercase = 1; | |
294 | break; | |
295 | } | |
296 | if (!has_lowercase) | |
297 | EBC_TOLOWER(dest, len); | |
298 | EBCASC(dest, len); | |
299 | } | |
300 | dest[len] = 0; | |
301 | } | |
302 | ||
303 | void get_ipl_vmparm(char *dest) | |
304 | { | |
305 | if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW)) | |
306 | reipl_get_ascii_vmparm(dest, &ipl_block); | |
307 | else | |
308 | dest[0] = 0; | |
309 | } | |
310 | ||
311 | static ssize_t ipl_vm_parm_show(struct kobject *kobj, | |
312 | struct kobj_attribute *attr, char *page) | |
313 | { | |
314 | char parm[DIAG308_VMPARM_SIZE + 1] = {}; | |
315 | ||
316 | get_ipl_vmparm(parm); | |
317 | return sprintf(page, "%s\n", parm); | |
318 | } | |
319 | ||
320 | static struct kobj_attribute sys_ipl_vm_parm_attr = | |
321 | __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL); | |
322 | ||
9b949165 GKH |
323 | static ssize_t sys_ipl_device_show(struct kobject *kobj, |
324 | struct kobj_attribute *attr, char *page) | |
ff6b8ea6 MH |
325 | { |
326 | struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START; | |
327 | ||
411ed322 | 328 | switch (ipl_info.type) { |
ff6b8ea6 MH |
329 | case IPL_TYPE_CCW: |
330 | return sprintf(page, "0.0.%04x\n", ipl_devno); | |
331 | case IPL_TYPE_FCP: | |
411ed322 | 332 | case IPL_TYPE_FCP_DUMP: |
ff6b8ea6 MH |
333 | return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno); |
334 | default: | |
335 | return 0; | |
336 | } | |
337 | } | |
338 | ||
9b949165 | 339 | static struct kobj_attribute sys_ipl_device_attr = |
ff6b8ea6 MH |
340 | __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL); |
341 | ||
05bd711e AV |
342 | static ssize_t ipl_parameter_read(struct kobject *kobj, struct bin_attribute *attr, |
343 | char *buf, loff_t off, size_t count) | |
ff6b8ea6 | 344 | { |
0788fea4 AM |
345 | return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START, |
346 | IPL_PARMBLOCK_SIZE); | |
ff6b8ea6 MH |
347 | } |
348 | ||
349 | static struct bin_attribute ipl_parameter_attr = { | |
350 | .attr = { | |
351 | .name = "binary_parameter", | |
352 | .mode = S_IRUGO, | |
ff6b8ea6 MH |
353 | }, |
354 | .size = PAGE_SIZE, | |
355 | .read = &ipl_parameter_read, | |
356 | }; | |
357 | ||
05bd711e AV |
358 | static ssize_t ipl_scp_data_read(struct kobject *kobj, struct bin_attribute *attr, |
359 | char *buf, loff_t off, size_t count) | |
ff6b8ea6 MH |
360 | { |
361 | unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len; | |
362 | void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data; | |
363 | ||
0788fea4 | 364 | return memory_read_from_buffer(buf, count, &off, scp_data, size); |
ff6b8ea6 MH |
365 | } |
366 | ||
367 | static struct bin_attribute ipl_scp_data_attr = { | |
368 | .attr = { | |
369 | .name = "scp_data", | |
370 | .mode = S_IRUGO, | |
ff6b8ea6 MH |
371 | }, |
372 | .size = PAGE_SIZE, | |
05bd711e | 373 | .read = ipl_scp_data_read, |
ff6b8ea6 MH |
374 | }; |
375 | ||
376 | /* FCP ipl device attributes */ | |
377 | ||
378 | DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long) | |
379 | IPL_PARMBLOCK_START->ipl_info.fcp.wwpn); | |
380 | DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long) | |
381 | IPL_PARMBLOCK_START->ipl_info.fcp.lun); | |
382 | DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long) | |
383 | IPL_PARMBLOCK_START->ipl_info.fcp.bootprog); | |
384 | DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long) | |
385 | IPL_PARMBLOCK_START->ipl_info.fcp.br_lba); | |
386 | ||
387 | static struct attribute *ipl_fcp_attrs[] = { | |
388 | &sys_ipl_type_attr.attr, | |
389 | &sys_ipl_device_attr.attr, | |
390 | &sys_ipl_fcp_wwpn_attr.attr, | |
391 | &sys_ipl_fcp_lun_attr.attr, | |
392 | &sys_ipl_fcp_bootprog_attr.attr, | |
393 | &sys_ipl_fcp_br_lba_attr.attr, | |
394 | NULL, | |
395 | }; | |
396 | ||
397 | static struct attribute_group ipl_fcp_attr_group = { | |
398 | .attrs = ipl_fcp_attrs, | |
399 | }; | |
400 | ||
401 | /* CCW ipl device attributes */ | |
402 | ||
9b949165 GKH |
403 | static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj, |
404 | struct kobj_attribute *attr, char *page) | |
03a4d208 MH |
405 | { |
406 | char loadparm[LOADPARM_LEN + 1] = {}; | |
407 | ||
05dd2530 | 408 | if (!sclp_ipl_info.is_valid) |
03a4d208 | 409 | return sprintf(page, "#unknown#\n"); |
05dd2530 | 410 | memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN); |
03a4d208 MH |
411 | EBCASC(loadparm, LOADPARM_LEN); |
412 | strstrip(loadparm); | |
413 | return sprintf(page, "%s\n", loadparm); | |
414 | } | |
415 | ||
9b949165 | 416 | static struct kobj_attribute sys_ipl_ccw_loadparm_attr = |
03a4d208 MH |
417 | __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL); |
418 | ||
a0443fbb HB |
419 | static struct attribute *ipl_ccw_attrs_vm[] = { |
420 | &sys_ipl_type_attr.attr, | |
421 | &sys_ipl_device_attr.attr, | |
422 | &sys_ipl_ccw_loadparm_attr.attr, | |
423 | &sys_ipl_vm_parm_attr.attr, | |
424 | NULL, | |
425 | }; | |
426 | ||
427 | static struct attribute *ipl_ccw_attrs_lpar[] = { | |
ff6b8ea6 MH |
428 | &sys_ipl_type_attr.attr, |
429 | &sys_ipl_device_attr.attr, | |
03a4d208 | 430 | &sys_ipl_ccw_loadparm_attr.attr, |
ff6b8ea6 MH |
431 | NULL, |
432 | }; | |
433 | ||
a0443fbb HB |
434 | static struct attribute_group ipl_ccw_attr_group_vm = { |
435 | .attrs = ipl_ccw_attrs_vm, | |
436 | }; | |
437 | ||
438 | static struct attribute_group ipl_ccw_attr_group_lpar = { | |
439 | .attrs = ipl_ccw_attrs_lpar | |
ff6b8ea6 MH |
440 | }; |
441 | ||
fe355b7f HY |
442 | /* NSS ipl device attributes */ |
443 | ||
444 | DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name); | |
445 | ||
446 | static struct attribute *ipl_nss_attrs[] = { | |
447 | &sys_ipl_type_attr.attr, | |
448 | &sys_ipl_nss_name_attr.attr, | |
a0443fbb HB |
449 | &sys_ipl_ccw_loadparm_attr.attr, |
450 | &sys_ipl_vm_parm_attr.attr, | |
fe355b7f HY |
451 | NULL, |
452 | }; | |
453 | ||
454 | static struct attribute_group ipl_nss_attr_group = { | |
455 | .attrs = ipl_nss_attrs, | |
456 | }; | |
457 | ||
ff6b8ea6 MH |
458 | /* UNKNOWN ipl device attributes */ |
459 | ||
460 | static struct attribute *ipl_unknown_attrs[] = { | |
461 | &sys_ipl_type_attr.attr, | |
462 | NULL, | |
463 | }; | |
464 | ||
465 | static struct attribute_group ipl_unknown_attr_group = { | |
466 | .attrs = ipl_unknown_attrs, | |
467 | }; | |
468 | ||
d91885be | 469 | static struct kset *ipl_kset; |
ff6b8ea6 | 470 | |
99ca4e58 MH |
471 | static int __init ipl_register_fcp_files(void) |
472 | { | |
473 | int rc; | |
474 | ||
475 | rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group); | |
476 | if (rc) | |
477 | goto out; | |
478 | rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_parameter_attr); | |
479 | if (rc) | |
480 | goto out_ipl_parm; | |
481 | rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_scp_data_attr); | |
482 | if (!rc) | |
483 | goto out; | |
484 | ||
485 | sysfs_remove_bin_file(&ipl_kset->kobj, &ipl_parameter_attr); | |
486 | ||
487 | out_ipl_parm: | |
488 | sysfs_remove_group(&ipl_kset->kobj, &ipl_fcp_attr_group); | |
489 | out: | |
490 | return rc; | |
491 | } | |
492 | ||
493 | static void ipl_run(struct shutdown_trigger *trigger) | |
494 | { | |
495 | diag308(DIAG308_IPL, NULL); | |
496 | if (MACHINE_IS_VM) | |
497 | __cpcmd("IPL", NULL, 0, NULL); | |
498 | else if (ipl_info.type == IPL_TYPE_CCW) | |
499 | reipl_ccw_dev(&ipl_info.data.ccw.dev_id); | |
500 | } | |
501 | ||
2bc89b5e | 502 | static int __init ipl_init(void) |
99ca4e58 MH |
503 | { |
504 | int rc; | |
505 | ||
506 | ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj); | |
507 | if (!ipl_kset) { | |
508 | rc = -ENOMEM; | |
509 | goto out; | |
510 | } | |
511 | switch (ipl_info.type) { | |
512 | case IPL_TYPE_CCW: | |
a0443fbb HB |
513 | if (MACHINE_IS_VM) |
514 | rc = sysfs_create_group(&ipl_kset->kobj, | |
515 | &ipl_ccw_attr_group_vm); | |
516 | else | |
517 | rc = sysfs_create_group(&ipl_kset->kobj, | |
518 | &ipl_ccw_attr_group_lpar); | |
99ca4e58 MH |
519 | break; |
520 | case IPL_TYPE_FCP: | |
521 | case IPL_TYPE_FCP_DUMP: | |
522 | rc = ipl_register_fcp_files(); | |
523 | break; | |
524 | case IPL_TYPE_NSS: | |
525 | rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group); | |
526 | break; | |
527 | default: | |
528 | rc = sysfs_create_group(&ipl_kset->kobj, | |
529 | &ipl_unknown_attr_group); | |
530 | break; | |
531 | } | |
532 | out: | |
533 | if (rc) | |
534 | panic("ipl_init failed: rc = %i\n", rc); | |
535 | ||
536 | return 0; | |
537 | } | |
538 | ||
2bc89b5e HC |
539 | static struct shutdown_action __refdata ipl_action = { |
540 | .name = SHUTDOWN_ACTION_IPL_STR, | |
541 | .fn = ipl_run, | |
542 | .init = ipl_init, | |
543 | }; | |
99ca4e58 | 544 | |
ff6b8ea6 | 545 | /* |
99ca4e58 | 546 | * reipl shutdown action: Reboot Linux on shutdown. |
ff6b8ea6 MH |
547 | */ |
548 | ||
a0443fbb HB |
549 | /* VM IPL PARM attributes */ |
550 | static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb, | |
551 | char *page) | |
552 | { | |
553 | char vmparm[DIAG308_VMPARM_SIZE + 1] = {}; | |
554 | ||
555 | reipl_get_ascii_vmparm(vmparm, ipb); | |
556 | return sprintf(page, "%s\n", vmparm); | |
557 | } | |
558 | ||
559 | static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb, | |
560 | size_t vmparm_max, | |
561 | const char *buf, size_t len) | |
562 | { | |
563 | int i, ip_len; | |
564 | ||
565 | /* ignore trailing newline */ | |
566 | ip_len = len; | |
567 | if ((len > 0) && (buf[len - 1] == '\n')) | |
568 | ip_len--; | |
569 | ||
570 | if (ip_len > vmparm_max) | |
571 | return -EINVAL; | |
572 | ||
573 | /* parm is used to store kernel options, check for common chars */ | |
574 | for (i = 0; i < ip_len; i++) | |
575 | if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i]))) | |
576 | return -EINVAL; | |
577 | ||
578 | memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE); | |
579 | ipb->ipl_info.ccw.vm_parm_len = ip_len; | |
580 | if (ip_len > 0) { | |
581 | ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID; | |
582 | memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len); | |
583 | ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len); | |
584 | } else { | |
585 | ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID; | |
586 | } | |
587 | ||
588 | return len; | |
589 | } | |
590 | ||
591 | /* NSS wrapper */ | |
592 | static ssize_t reipl_nss_vmparm_show(struct kobject *kobj, | |
593 | struct kobj_attribute *attr, char *page) | |
594 | { | |
595 | return reipl_generic_vmparm_show(reipl_block_nss, page); | |
596 | } | |
597 | ||
598 | static ssize_t reipl_nss_vmparm_store(struct kobject *kobj, | |
599 | struct kobj_attribute *attr, | |
600 | const char *buf, size_t len) | |
601 | { | |
602 | return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len); | |
603 | } | |
604 | ||
605 | /* CCW wrapper */ | |
606 | static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj, | |
607 | struct kobj_attribute *attr, char *page) | |
608 | { | |
609 | return reipl_generic_vmparm_show(reipl_block_ccw, page); | |
610 | } | |
611 | ||
612 | static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj, | |
613 | struct kobj_attribute *attr, | |
614 | const char *buf, size_t len) | |
615 | { | |
616 | return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len); | |
617 | } | |
618 | ||
619 | static struct kobj_attribute sys_reipl_nss_vmparm_attr = | |
620 | __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show, | |
621 | reipl_nss_vmparm_store); | |
622 | static struct kobj_attribute sys_reipl_ccw_vmparm_attr = | |
623 | __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show, | |
624 | reipl_ccw_vmparm_store); | |
625 | ||
ff6b8ea6 MH |
626 | /* FCP reipl device attributes */ |
627 | ||
628 | DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n", | |
629 | reipl_block_fcp->ipl_info.fcp.wwpn); | |
630 | DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n", | |
631 | reipl_block_fcp->ipl_info.fcp.lun); | |
632 | DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n", | |
633 | reipl_block_fcp->ipl_info.fcp.bootprog); | |
634 | DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n", | |
635 | reipl_block_fcp->ipl_info.fcp.br_lba); | |
636 | DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n", | |
637 | reipl_block_fcp->ipl_info.fcp.devno); | |
638 | ||
639 | static struct attribute *reipl_fcp_attrs[] = { | |
640 | &sys_reipl_fcp_device_attr.attr, | |
641 | &sys_reipl_fcp_wwpn_attr.attr, | |
642 | &sys_reipl_fcp_lun_attr.attr, | |
643 | &sys_reipl_fcp_bootprog_attr.attr, | |
644 | &sys_reipl_fcp_br_lba_attr.attr, | |
645 | NULL, | |
646 | }; | |
647 | ||
648 | static struct attribute_group reipl_fcp_attr_group = { | |
649 | .name = IPL_FCP_STR, | |
650 | .attrs = reipl_fcp_attrs, | |
651 | }; | |
652 | ||
653 | /* CCW reipl device attributes */ | |
654 | ||
655 | DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n", | |
656 | reipl_block_ccw->ipl_info.ccw.devno); | |
657 | ||
a0443fbb HB |
658 | static void reipl_get_ascii_loadparm(char *loadparm, |
659 | struct ipl_parameter_block *ibp) | |
03a4d208 | 660 | { |
a0443fbb | 661 | memcpy(loadparm, ibp->ipl_info.ccw.load_parm, LOADPARM_LEN); |
03a4d208 MH |
662 | EBCASC(loadparm, LOADPARM_LEN); |
663 | loadparm[LOADPARM_LEN] = 0; | |
664 | strstrip(loadparm); | |
665 | } | |
666 | ||
a0443fbb HB |
667 | static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb, |
668 | char *page) | |
03a4d208 MH |
669 | { |
670 | char buf[LOADPARM_LEN + 1]; | |
671 | ||
a0443fbb | 672 | reipl_get_ascii_loadparm(buf, ipb); |
03a4d208 MH |
673 | return sprintf(page, "%s\n", buf); |
674 | } | |
675 | ||
a0443fbb HB |
676 | static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb, |
677 | const char *buf, size_t len) | |
03a4d208 MH |
678 | { |
679 | int i, lp_len; | |
680 | ||
681 | /* ignore trailing newline */ | |
682 | lp_len = len; | |
683 | if ((len > 0) && (buf[len - 1] == '\n')) | |
684 | lp_len--; | |
685 | /* loadparm can have max 8 characters and must not start with a blank */ | |
686 | if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' '))) | |
687 | return -EINVAL; | |
688 | /* loadparm can only contain "a-z,A-Z,0-9,SP,." */ | |
689 | for (i = 0; i < lp_len; i++) { | |
690 | if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') || | |
691 | (buf[i] == '.')) | |
692 | continue; | |
693 | return -EINVAL; | |
694 | } | |
695 | /* initialize loadparm with blanks */ | |
a0443fbb | 696 | memset(ipb->ipl_info.ccw.load_parm, ' ', LOADPARM_LEN); |
03a4d208 | 697 | /* copy and convert to ebcdic */ |
a0443fbb HB |
698 | memcpy(ipb->ipl_info.ccw.load_parm, buf, lp_len); |
699 | ASCEBC(ipb->ipl_info.ccw.load_parm, LOADPARM_LEN); | |
03a4d208 MH |
700 | return len; |
701 | } | |
702 | ||
a0443fbb HB |
703 | /* NSS wrapper */ |
704 | static ssize_t reipl_nss_loadparm_show(struct kobject *kobj, | |
705 | struct kobj_attribute *attr, char *page) | |
706 | { | |
707 | return reipl_generic_loadparm_show(reipl_block_nss, page); | |
708 | } | |
709 | ||
710 | static ssize_t reipl_nss_loadparm_store(struct kobject *kobj, | |
711 | struct kobj_attribute *attr, | |
712 | const char *buf, size_t len) | |
713 | { | |
714 | return reipl_generic_loadparm_store(reipl_block_nss, buf, len); | |
715 | } | |
716 | ||
717 | /* CCW wrapper */ | |
718 | static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj, | |
719 | struct kobj_attribute *attr, char *page) | |
720 | { | |
721 | return reipl_generic_loadparm_show(reipl_block_ccw, page); | |
722 | } | |
723 | ||
724 | static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj, | |
725 | struct kobj_attribute *attr, | |
726 | const char *buf, size_t len) | |
727 | { | |
728 | return reipl_generic_loadparm_store(reipl_block_ccw, buf, len); | |
729 | } | |
730 | ||
9b949165 | 731 | static struct kobj_attribute sys_reipl_ccw_loadparm_attr = |
a0443fbb HB |
732 | __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show, |
733 | reipl_ccw_loadparm_store); | |
734 | ||
735 | static struct attribute *reipl_ccw_attrs_vm[] = { | |
736 | &sys_reipl_ccw_device_attr.attr, | |
737 | &sys_reipl_ccw_loadparm_attr.attr, | |
738 | &sys_reipl_ccw_vmparm_attr.attr, | |
739 | NULL, | |
740 | }; | |
03a4d208 | 741 | |
a0443fbb | 742 | static struct attribute *reipl_ccw_attrs_lpar[] = { |
ff6b8ea6 | 743 | &sys_reipl_ccw_device_attr.attr, |
03a4d208 | 744 | &sys_reipl_ccw_loadparm_attr.attr, |
ff6b8ea6 MH |
745 | NULL, |
746 | }; | |
747 | ||
a0443fbb | 748 | static struct attribute_group reipl_ccw_attr_group_vm = { |
ff6b8ea6 | 749 | .name = IPL_CCW_STR, |
a0443fbb HB |
750 | .attrs = reipl_ccw_attrs_vm, |
751 | }; | |
752 | ||
753 | static struct attribute_group reipl_ccw_attr_group_lpar = { | |
754 | .name = IPL_CCW_STR, | |
755 | .attrs = reipl_ccw_attrs_lpar, | |
ff6b8ea6 MH |
756 | }; |
757 | ||
fe355b7f HY |
758 | |
759 | /* NSS reipl device attributes */ | |
a0443fbb HB |
760 | static void reipl_get_ascii_nss_name(char *dst, |
761 | struct ipl_parameter_block *ipb) | |
762 | { | |
763 | memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE); | |
764 | EBCASC(dst, NSS_NAME_SIZE); | |
765 | dst[NSS_NAME_SIZE] = 0; | |
766 | } | |
767 | ||
768 | static ssize_t reipl_nss_name_show(struct kobject *kobj, | |
769 | struct kobj_attribute *attr, char *page) | |
770 | { | |
771 | char nss_name[NSS_NAME_SIZE + 1] = {}; | |
772 | ||
773 | reipl_get_ascii_nss_name(nss_name, reipl_block_nss); | |
774 | return sprintf(page, "%s\n", nss_name); | |
775 | } | |
776 | ||
777 | static ssize_t reipl_nss_name_store(struct kobject *kobj, | |
778 | struct kobj_attribute *attr, | |
779 | const char *buf, size_t len) | |
780 | { | |
781 | int nss_len; | |
782 | ||
783 | /* ignore trailing newline */ | |
784 | nss_len = len; | |
785 | if ((len > 0) && (buf[len - 1] == '\n')) | |
786 | nss_len--; | |
fe355b7f | 787 | |
a0443fbb HB |
788 | if (nss_len > NSS_NAME_SIZE) |
789 | return -EINVAL; | |
790 | ||
791 | memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE); | |
792 | if (nss_len > 0) { | |
793 | reipl_block_nss->ipl_info.ccw.vm_flags |= | |
794 | DIAG308_VM_FLAGS_NSS_VALID; | |
795 | memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len); | |
796 | ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len); | |
797 | EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len); | |
798 | } else { | |
799 | reipl_block_nss->ipl_info.ccw.vm_flags &= | |
800 | ~DIAG308_VM_FLAGS_NSS_VALID; | |
801 | } | |
802 | ||
803 | return len; | |
804 | } | |
805 | ||
806 | static struct kobj_attribute sys_reipl_nss_name_attr = | |
807 | __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show, | |
808 | reipl_nss_name_store); | |
809 | ||
810 | static struct kobj_attribute sys_reipl_nss_loadparm_attr = | |
811 | __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show, | |
812 | reipl_nss_loadparm_store); | |
fe355b7f HY |
813 | |
814 | static struct attribute *reipl_nss_attrs[] = { | |
815 | &sys_reipl_nss_name_attr.attr, | |
a0443fbb HB |
816 | &sys_reipl_nss_loadparm_attr.attr, |
817 | &sys_reipl_nss_vmparm_attr.attr, | |
fe355b7f HY |
818 | NULL, |
819 | }; | |
820 | ||
821 | static struct attribute_group reipl_nss_attr_group = { | |
822 | .name = IPL_NSS_STR, | |
823 | .attrs = reipl_nss_attrs, | |
824 | }; | |
825 | ||
ff6b8ea6 MH |
826 | /* reipl type */ |
827 | ||
828 | static int reipl_set_type(enum ipl_type type) | |
829 | { | |
830 | if (!(reipl_capabilities & type)) | |
831 | return -EINVAL; | |
832 | ||
833 | switch(type) { | |
834 | case IPL_TYPE_CCW: | |
48657d22 MH |
835 | if (diag308_set_works) |
836 | reipl_method = REIPL_METHOD_CCW_DIAG; | |
837 | else if (MACHINE_IS_VM) | |
411ed322 | 838 | reipl_method = REIPL_METHOD_CCW_VM; |
ff6b8ea6 | 839 | else |
411ed322 | 840 | reipl_method = REIPL_METHOD_CCW_CIO; |
099b7651 | 841 | reipl_block_actual = reipl_block_ccw; |
ff6b8ea6 MH |
842 | break; |
843 | case IPL_TYPE_FCP: | |
844 | if (diag308_set_works) | |
411ed322 | 845 | reipl_method = REIPL_METHOD_FCP_RW_DIAG; |
ff6b8ea6 | 846 | else if (MACHINE_IS_VM) |
411ed322 | 847 | reipl_method = REIPL_METHOD_FCP_RO_VM; |
ff6b8ea6 | 848 | else |
411ed322 | 849 | reipl_method = REIPL_METHOD_FCP_RO_DIAG; |
099b7651 | 850 | reipl_block_actual = reipl_block_fcp; |
411ed322 MH |
851 | break; |
852 | case IPL_TYPE_FCP_DUMP: | |
853 | reipl_method = REIPL_METHOD_FCP_DUMP; | |
ff6b8ea6 | 854 | break; |
fe355b7f | 855 | case IPL_TYPE_NSS: |
a0443fbb HB |
856 | if (diag308_set_works) |
857 | reipl_method = REIPL_METHOD_NSS_DIAG; | |
858 | else | |
859 | reipl_method = REIPL_METHOD_NSS; | |
099b7651 | 860 | reipl_block_actual = reipl_block_nss; |
411ed322 MH |
861 | break; |
862 | case IPL_TYPE_UNKNOWN: | |
863 | reipl_method = REIPL_METHOD_DEFAULT; | |
fe355b7f | 864 | break; |
ff6b8ea6 | 865 | default: |
411ed322 | 866 | BUG(); |
ff6b8ea6 MH |
867 | } |
868 | reipl_type = type; | |
869 | return 0; | |
870 | } | |
871 | ||
9b949165 GKH |
872 | static ssize_t reipl_type_show(struct kobject *kobj, |
873 | struct kobj_attribute *attr, char *page) | |
ff6b8ea6 MH |
874 | { |
875 | return sprintf(page, "%s\n", ipl_type_str(reipl_type)); | |
876 | } | |
877 | ||
9b949165 GKH |
878 | static ssize_t reipl_type_store(struct kobject *kobj, |
879 | struct kobj_attribute *attr, | |
880 | const char *buf, size_t len) | |
ff6b8ea6 MH |
881 | { |
882 | int rc = -EINVAL; | |
883 | ||
884 | if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0) | |
885 | rc = reipl_set_type(IPL_TYPE_CCW); | |
886 | else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0) | |
887 | rc = reipl_set_type(IPL_TYPE_FCP); | |
fe355b7f HY |
888 | else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0) |
889 | rc = reipl_set_type(IPL_TYPE_NSS); | |
ff6b8ea6 MH |
890 | return (rc != 0) ? rc : len; |
891 | } | |
892 | ||
9b949165 | 893 | static struct kobj_attribute reipl_type_attr = |
99ca4e58 | 894 | __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store); |
ff6b8ea6 | 895 | |
d91885be | 896 | static struct kset *reipl_kset; |
ff6b8ea6 | 897 | |
a0443fbb HB |
898 | static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb, |
899 | const enum ipl_method m) | |
900 | { | |
901 | char loadparm[LOADPARM_LEN + 1] = {}; | |
902 | char vmparm[DIAG308_VMPARM_SIZE + 1] = {}; | |
903 | char nss_name[NSS_NAME_SIZE + 1] = {}; | |
904 | size_t pos = 0; | |
905 | ||
906 | reipl_get_ascii_loadparm(loadparm, ipb); | |
907 | reipl_get_ascii_nss_name(nss_name, ipb); | |
908 | reipl_get_ascii_vmparm(vmparm, ipb); | |
909 | ||
910 | switch (m) { | |
911 | case REIPL_METHOD_CCW_VM: | |
912 | pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno); | |
913 | break; | |
914 | case REIPL_METHOD_NSS: | |
915 | pos = sprintf(dst, "IPL %s", nss_name); | |
916 | break; | |
917 | default: | |
918 | break; | |
919 | } | |
920 | if (strlen(loadparm) > 0) | |
921 | pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm); | |
922 | if (strlen(vmparm) > 0) | |
923 | sprintf(dst + pos, " PARM %s", vmparm); | |
924 | } | |
925 | ||
a806170e | 926 | static void reipl_run(struct shutdown_trigger *trigger) |
ff6b8ea6 MH |
927 | { |
928 | struct ccw_dev_id devid; | |
a0443fbb | 929 | static char buf[128]; |
ff6b8ea6 | 930 | |
ff6b8ea6 | 931 | switch (reipl_method) { |
411ed322 | 932 | case REIPL_METHOD_CCW_CIO: |
ff6b8ea6 MH |
933 | devid.devno = reipl_block_ccw->ipl_info.ccw.devno; |
934 | devid.ssid = 0; | |
935 | reipl_ccw_dev(&devid); | |
936 | break; | |
411ed322 | 937 | case REIPL_METHOD_CCW_VM: |
a0443fbb | 938 | get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM); |
740b5706 | 939 | __cpcmd(buf, NULL, 0, NULL); |
ff6b8ea6 | 940 | break; |
411ed322 | 941 | case REIPL_METHOD_CCW_DIAG: |
ff6b8ea6 MH |
942 | diag308(DIAG308_SET, reipl_block_ccw); |
943 | diag308(DIAG308_IPL, NULL); | |
944 | break; | |
411ed322 | 945 | case REIPL_METHOD_FCP_RW_DIAG: |
ff6b8ea6 MH |
946 | diag308(DIAG308_SET, reipl_block_fcp); |
947 | diag308(DIAG308_IPL, NULL); | |
948 | break; | |
411ed322 | 949 | case REIPL_METHOD_FCP_RO_DIAG: |
ff6b8ea6 MH |
950 | diag308(DIAG308_IPL, NULL); |
951 | break; | |
411ed322 | 952 | case REIPL_METHOD_FCP_RO_VM: |
740b5706 | 953 | __cpcmd("IPL", NULL, 0, NULL); |
ff6b8ea6 | 954 | break; |
a0443fbb HB |
955 | case REIPL_METHOD_NSS_DIAG: |
956 | diag308(DIAG308_SET, reipl_block_nss); | |
957 | diag308(DIAG308_IPL, NULL); | |
958 | break; | |
411ed322 | 959 | case REIPL_METHOD_NSS: |
a0443fbb | 960 | get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS); |
fe355b7f HY |
961 | __cpcmd(buf, NULL, 0, NULL); |
962 | break; | |
411ed322 | 963 | case REIPL_METHOD_DEFAULT: |
ff6b8ea6 | 964 | if (MACHINE_IS_VM) |
740b5706 | 965 | __cpcmd("IPL", NULL, 0, NULL); |
ff6b8ea6 MH |
966 | diag308(DIAG308_IPL, NULL); |
967 | break; | |
411ed322 | 968 | case REIPL_METHOD_FCP_DUMP: |
411ed322 | 969 | break; |
ff6b8ea6 | 970 | } |
208e5591 | 971 | disabled_wait((unsigned long) __builtin_return_address(0)); |
ff6b8ea6 MH |
972 | } |
973 | ||
a0443fbb | 974 | static void reipl_block_ccw_init(struct ipl_parameter_block *ipb) |
ff6b8ea6 | 975 | { |
a0443fbb HB |
976 | ipb->hdr.len = IPL_PARM_BLK_CCW_LEN; |
977 | ipb->hdr.version = IPL_PARM_BLOCK_VERSION; | |
978 | ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN; | |
979 | ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW; | |
980 | } | |
ff6b8ea6 | 981 | |
a0443fbb HB |
982 | static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb) |
983 | { | |
984 | /* LOADPARM */ | |
985 | /* check if read scp info worked and set loadparm */ | |
986 | if (sclp_ipl_info.is_valid) | |
987 | memcpy(ipb->ipl_info.ccw.load_parm, | |
988 | &sclp_ipl_info.loadparm, LOADPARM_LEN); | |
989 | else | |
990 | /* read scp info failed: set empty loadparm (EBCDIC blanks) */ | |
991 | memset(ipb->ipl_info.ccw.load_parm, 0x40, LOADPARM_LEN); | |
992 | ipb->hdr.flags = DIAG308_FLAGS_LP_VALID; | |
993 | ||
994 | /* VM PARM */ | |
995 | if (MACHINE_IS_VM && diag308_set_works && | |
996 | (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) { | |
997 | ||
998 | ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID; | |
999 | ipb->ipl_info.ccw.vm_parm_len = | |
1000 | ipl_block.ipl_info.ccw.vm_parm_len; | |
1001 | memcpy(ipb->ipl_info.ccw.vm_parm, | |
1002 | ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE); | |
1003 | } | |
ff6b8ea6 MH |
1004 | } |
1005 | ||
99ca4e58 | 1006 | static int __init reipl_nss_init(void) |
ff6b8ea6 MH |
1007 | { |
1008 | int rc; | |
1009 | ||
99ca4e58 MH |
1010 | if (!MACHINE_IS_VM) |
1011 | return 0; | |
a0443fbb HB |
1012 | |
1013 | reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL); | |
1014 | if (!reipl_block_nss) | |
1015 | return -ENOMEM; | |
1016 | ||
1017 | if (!diag308_set_works) | |
1018 | sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO; | |
1019 | ||
99ca4e58 | 1020 | rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group); |
fe355b7f HY |
1021 | if (rc) |
1022 | return rc; | |
a0443fbb HB |
1023 | |
1024 | reipl_block_ccw_init(reipl_block_nss); | |
1025 | if (ipl_info.type == IPL_TYPE_NSS) { | |
1026 | memset(reipl_block_nss->ipl_info.ccw.nss_name, | |
1027 | ' ', NSS_NAME_SIZE); | |
1028 | memcpy(reipl_block_nss->ipl_info.ccw.nss_name, | |
1029 | kernel_nss_name, strlen(kernel_nss_name)); | |
1030 | ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE); | |
1031 | reipl_block_nss->ipl_info.ccw.vm_flags |= | |
1032 | DIAG308_VM_FLAGS_NSS_VALID; | |
1033 | ||
1034 | reipl_block_ccw_fill_parms(reipl_block_nss); | |
1035 | } | |
1036 | ||
fe355b7f HY |
1037 | reipl_capabilities |= IPL_TYPE_NSS; |
1038 | return 0; | |
1039 | } | |
1040 | ||
ff6b8ea6 MH |
1041 | static int __init reipl_ccw_init(void) |
1042 | { | |
1043 | int rc; | |
1044 | ||
1045 | reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL); | |
1046 | if (!reipl_block_ccw) | |
1047 | return -ENOMEM; | |
a0443fbb HB |
1048 | |
1049 | if (MACHINE_IS_VM) { | |
1050 | if (!diag308_set_works) | |
1051 | sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO; | |
1052 | rc = sysfs_create_group(&reipl_kset->kobj, | |
1053 | &reipl_ccw_attr_group_vm); | |
1054 | } else { | |
1055 | if(!diag308_set_works) | |
1056 | sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO; | |
1057 | rc = sysfs_create_group(&reipl_kset->kobj, | |
1058 | &reipl_ccw_attr_group_lpar); | |
ff6b8ea6 | 1059 | } |
a0443fbb HB |
1060 | if (rc) |
1061 | return rc; | |
1062 | ||
1063 | reipl_block_ccw_init(reipl_block_ccw); | |
1064 | if (ipl_info.type == IPL_TYPE_CCW) { | |
ff6b8ea6 | 1065 | reipl_block_ccw->ipl_info.ccw.devno = ipl_devno; |
a0443fbb HB |
1066 | reipl_block_ccw_fill_parms(reipl_block_ccw); |
1067 | } | |
1068 | ||
ff6b8ea6 MH |
1069 | reipl_capabilities |= IPL_TYPE_CCW; |
1070 | return 0; | |
1071 | } | |
1072 | ||
1073 | static int __init reipl_fcp_init(void) | |
1074 | { | |
1075 | int rc; | |
1076 | ||
008d2d11 MH |
1077 | if (!diag308_set_works) { |
1078 | if (ipl_info.type == IPL_TYPE_FCP) | |
1079 | make_attrs_ro(reipl_fcp_attrs); | |
1080 | else | |
1081 | return 0; | |
1082 | } | |
ff6b8ea6 MH |
1083 | |
1084 | reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL); | |
1085 | if (!reipl_block_fcp) | |
1086 | return -ENOMEM; | |
d91885be | 1087 | rc = sysfs_create_group(&reipl_kset->kobj, &reipl_fcp_attr_group); |
ff6b8ea6 MH |
1088 | if (rc) { |
1089 | free_page((unsigned long)reipl_block_fcp); | |
1090 | return rc; | |
1091 | } | |
411ed322 | 1092 | if (ipl_info.type == IPL_TYPE_FCP) { |
ff6b8ea6 MH |
1093 | memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE); |
1094 | } else { | |
1095 | reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN; | |
1096 | reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION; | |
fbb04f38 | 1097 | reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN; |
ff6b8ea6 MH |
1098 | reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP; |
1099 | reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL; | |
1100 | } | |
1101 | reipl_capabilities |= IPL_TYPE_FCP; | |
1102 | return 0; | |
1103 | } | |
1104 | ||
2bc89b5e | 1105 | static int __init reipl_init(void) |
ff6b8ea6 MH |
1106 | { |
1107 | int rc; | |
1108 | ||
f62ed9e3 | 1109 | reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj); |
d91885be GKH |
1110 | if (!reipl_kset) |
1111 | return -ENOMEM; | |
1112 | rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr); | |
ff6b8ea6 | 1113 | if (rc) { |
d91885be | 1114 | kset_unregister(reipl_kset); |
ff6b8ea6 MH |
1115 | return rc; |
1116 | } | |
1117 | rc = reipl_ccw_init(); | |
1118 | if (rc) | |
1119 | return rc; | |
1120 | rc = reipl_fcp_init(); | |
fe355b7f HY |
1121 | if (rc) |
1122 | return rc; | |
1123 | rc = reipl_nss_init(); | |
ff6b8ea6 MH |
1124 | if (rc) |
1125 | return rc; | |
411ed322 | 1126 | rc = reipl_set_type(ipl_info.type); |
ff6b8ea6 MH |
1127 | if (rc) |
1128 | return rc; | |
1129 | return 0; | |
1130 | } | |
1131 | ||
2bc89b5e HC |
1132 | static struct shutdown_action __refdata reipl_action = { |
1133 | .name = SHUTDOWN_ACTION_REIPL_STR, | |
1134 | .fn = reipl_run, | |
1135 | .init = reipl_init, | |
1136 | }; | |
99ca4e58 MH |
1137 | |
1138 | /* | |
1139 | * dump shutdown action: Dump Linux on shutdown. | |
1140 | */ | |
1141 | ||
1142 | /* FCP dump device attributes */ | |
1143 | ||
1144 | DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n", | |
1145 | dump_block_fcp->ipl_info.fcp.wwpn); | |
1146 | DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n", | |
1147 | dump_block_fcp->ipl_info.fcp.lun); | |
1148 | DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n", | |
1149 | dump_block_fcp->ipl_info.fcp.bootprog); | |
1150 | DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n", | |
1151 | dump_block_fcp->ipl_info.fcp.br_lba); | |
1152 | DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n", | |
1153 | dump_block_fcp->ipl_info.fcp.devno); | |
1154 | ||
1155 | static struct attribute *dump_fcp_attrs[] = { | |
1156 | &sys_dump_fcp_device_attr.attr, | |
1157 | &sys_dump_fcp_wwpn_attr.attr, | |
1158 | &sys_dump_fcp_lun_attr.attr, | |
1159 | &sys_dump_fcp_bootprog_attr.attr, | |
1160 | &sys_dump_fcp_br_lba_attr.attr, | |
1161 | NULL, | |
1162 | }; | |
1163 | ||
1164 | static struct attribute_group dump_fcp_attr_group = { | |
1165 | .name = IPL_FCP_STR, | |
1166 | .attrs = dump_fcp_attrs, | |
1167 | }; | |
1168 | ||
1169 | /* CCW dump device attributes */ | |
1170 | ||
1171 | DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n", | |
1172 | dump_block_ccw->ipl_info.ccw.devno); | |
1173 | ||
1174 | static struct attribute *dump_ccw_attrs[] = { | |
1175 | &sys_dump_ccw_device_attr.attr, | |
1176 | NULL, | |
1177 | }; | |
1178 | ||
1179 | static struct attribute_group dump_ccw_attr_group = { | |
1180 | .name = IPL_CCW_STR, | |
1181 | .attrs = dump_ccw_attrs, | |
1182 | }; | |
1183 | ||
1184 | /* dump type */ | |
1185 | ||
1186 | static int dump_set_type(enum dump_type type) | |
1187 | { | |
1188 | if (!(dump_capabilities & type)) | |
1189 | return -EINVAL; | |
1190 | switch (type) { | |
1191 | case DUMP_TYPE_CCW: | |
48657d22 MH |
1192 | if (diag308_set_works) |
1193 | dump_method = DUMP_METHOD_CCW_DIAG; | |
1194 | else if (MACHINE_IS_VM) | |
99ca4e58 MH |
1195 | dump_method = DUMP_METHOD_CCW_VM; |
1196 | else | |
1197 | dump_method = DUMP_METHOD_CCW_CIO; | |
1198 | break; | |
1199 | case DUMP_TYPE_FCP: | |
1200 | dump_method = DUMP_METHOD_FCP_DIAG; | |
1201 | break; | |
1202 | default: | |
1203 | dump_method = DUMP_METHOD_NONE; | |
1204 | } | |
1205 | dump_type = type; | |
1206 | return 0; | |
1207 | } | |
1208 | ||
1209 | static ssize_t dump_type_show(struct kobject *kobj, | |
1210 | struct kobj_attribute *attr, char *page) | |
1211 | { | |
1212 | return sprintf(page, "%s\n", dump_type_str(dump_type)); | |
1213 | } | |
1214 | ||
1215 | static ssize_t dump_type_store(struct kobject *kobj, | |
1216 | struct kobj_attribute *attr, | |
1217 | const char *buf, size_t len) | |
1218 | { | |
1219 | int rc = -EINVAL; | |
1220 | ||
1221 | if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0) | |
1222 | rc = dump_set_type(DUMP_TYPE_NONE); | |
1223 | else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0) | |
1224 | rc = dump_set_type(DUMP_TYPE_CCW); | |
1225 | else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0) | |
1226 | rc = dump_set_type(DUMP_TYPE_FCP); | |
1227 | return (rc != 0) ? rc : len; | |
1228 | } | |
1229 | ||
1230 | static struct kobj_attribute dump_type_attr = | |
1231 | __ATTR(dump_type, 0644, dump_type_show, dump_type_store); | |
1232 | ||
1233 | static struct kset *dump_kset; | |
1234 | ||
1235 | static void dump_run(struct shutdown_trigger *trigger) | |
1236 | { | |
1237 | struct ccw_dev_id devid; | |
1238 | static char buf[100]; | |
1239 | ||
1240 | switch (dump_method) { | |
1241 | case DUMP_METHOD_CCW_CIO: | |
1242 | smp_send_stop(); | |
1243 | devid.devno = dump_block_ccw->ipl_info.ccw.devno; | |
1244 | devid.ssid = 0; | |
1245 | reipl_ccw_dev(&devid); | |
1246 | break; | |
1247 | case DUMP_METHOD_CCW_VM: | |
1248 | smp_send_stop(); | |
1249 | sprintf(buf, "STORE STATUS"); | |
1250 | __cpcmd(buf, NULL, 0, NULL); | |
1251 | sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno); | |
1252 | __cpcmd(buf, NULL, 0, NULL); | |
1253 | break; | |
1254 | case DUMP_METHOD_CCW_DIAG: | |
1255 | diag308(DIAG308_SET, dump_block_ccw); | |
1256 | diag308(DIAG308_DUMP, NULL); | |
1257 | break; | |
1258 | case DUMP_METHOD_FCP_DIAG: | |
1259 | diag308(DIAG308_SET, dump_block_fcp); | |
1260 | diag308(DIAG308_DUMP, NULL); | |
1261 | break; | |
1262 | case DUMP_METHOD_NONE: | |
99ca4e58 MH |
1263 | return; |
1264 | } | |
1265 | printk(KERN_EMERG "Dump failed!\n"); | |
1266 | } | |
1267 | ||
ff6b8ea6 MH |
1268 | static int __init dump_ccw_init(void) |
1269 | { | |
1270 | int rc; | |
1271 | ||
1272 | dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL); | |
1273 | if (!dump_block_ccw) | |
1274 | return -ENOMEM; | |
d91885be | 1275 | rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group); |
ff6b8ea6 MH |
1276 | if (rc) { |
1277 | free_page((unsigned long)dump_block_ccw); | |
1278 | return rc; | |
1279 | } | |
1280 | dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN; | |
1281 | dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION; | |
fbb04f38 | 1282 | dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN; |
ff6b8ea6 | 1283 | dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW; |
411ed322 | 1284 | dump_capabilities |= DUMP_TYPE_CCW; |
ff6b8ea6 MH |
1285 | return 0; |
1286 | } | |
1287 | ||
ff6b8ea6 MH |
1288 | static int __init dump_fcp_init(void) |
1289 | { | |
1290 | int rc; | |
1291 | ||
05dd2530 | 1292 | if (!sclp_ipl_info.has_dump) |
ff6b8ea6 MH |
1293 | return 0; /* LDIPL DUMP is not installed */ |
1294 | if (!diag308_set_works) | |
1295 | return 0; | |
1296 | dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL); | |
1297 | if (!dump_block_fcp) | |
1298 | return -ENOMEM; | |
d91885be | 1299 | rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group); |
ff6b8ea6 MH |
1300 | if (rc) { |
1301 | free_page((unsigned long)dump_block_fcp); | |
1302 | return rc; | |
1303 | } | |
1304 | dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN; | |
1305 | dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION; | |
fbb04f38 | 1306 | dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN; |
ff6b8ea6 MH |
1307 | dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP; |
1308 | dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP; | |
411ed322 | 1309 | dump_capabilities |= DUMP_TYPE_FCP; |
ff6b8ea6 MH |
1310 | return 0; |
1311 | } | |
1312 | ||
2bc89b5e | 1313 | static int __init dump_init(void) |
ff6b8ea6 MH |
1314 | { |
1315 | int rc; | |
1316 | ||
f62ed9e3 | 1317 | dump_kset = kset_create_and_add("dump", NULL, firmware_kobj); |
d91885be GKH |
1318 | if (!dump_kset) |
1319 | return -ENOMEM; | |
99ca4e58 | 1320 | rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr); |
ff6b8ea6 | 1321 | if (rc) { |
d91885be | 1322 | kset_unregister(dump_kset); |
ff6b8ea6 MH |
1323 | return rc; |
1324 | } | |
1325 | rc = dump_ccw_init(); | |
1326 | if (rc) | |
1327 | return rc; | |
1328 | rc = dump_fcp_init(); | |
1329 | if (rc) | |
1330 | return rc; | |
411ed322 | 1331 | dump_set_type(DUMP_TYPE_NONE); |
ff6b8ea6 MH |
1332 | return 0; |
1333 | } | |
1334 | ||
2bc89b5e HC |
1335 | static struct shutdown_action __refdata dump_action = { |
1336 | .name = SHUTDOWN_ACTION_DUMP_STR, | |
1337 | .fn = dump_run, | |
1338 | .init = dump_init, | |
1339 | }; | |
99ca4e58 | 1340 | |
099b7651 FM |
1341 | static void dump_reipl_run(struct shutdown_trigger *trigger) |
1342 | { | |
1343 | preempt_disable(); | |
1344 | /* | |
1345 | * Bypass dynamic address translation (DAT) when storing IPL parameter | |
1346 | * information block address and checksum into the prefix area | |
1347 | * (corresponding to absolute addresses 0-8191). | |
1348 | * When enhanced DAT applies and the STE format control in one, | |
1349 | * the absolute address is formed without prefixing. In this case a | |
1350 | * normal store (stg/st) into the prefix area would no more match to | |
1351 | * absolute addresses 0-8191. | |
1352 | */ | |
1353 | #ifdef CONFIG_64BIT | |
1354 | asm volatile("sturg %0,%1" | |
1355 | :: "a" ((unsigned long) reipl_block_actual), | |
1356 | "a" (&lowcore_ptr[smp_processor_id()]->ipib)); | |
1357 | #else | |
1358 | asm volatile("stura %0,%1" | |
1359 | :: "a" ((unsigned long) reipl_block_actual), | |
1360 | "a" (&lowcore_ptr[smp_processor_id()]->ipib)); | |
1361 | #endif | |
1362 | asm volatile("stura %0,%1" | |
159d1ff8 FM |
1363 | :: "a" (csum_partial(reipl_block_actual, |
1364 | reipl_block_actual->hdr.len, 0)), | |
099b7651 FM |
1365 | "a" (&lowcore_ptr[smp_processor_id()]->ipib_checksum)); |
1366 | preempt_enable(); | |
1367 | dump_run(trigger); | |
1368 | } | |
1369 | ||
1370 | static int __init dump_reipl_init(void) | |
1371 | { | |
1372 | if (!diag308_set_works) | |
1373 | return -EOPNOTSUPP; | |
1374 | else | |
1375 | return 0; | |
1376 | } | |
1377 | ||
1378 | static struct shutdown_action __refdata dump_reipl_action = { | |
1379 | .name = SHUTDOWN_ACTION_DUMP_REIPL_STR, | |
1380 | .fn = dump_reipl_run, | |
1381 | .init = dump_reipl_init, | |
1382 | }; | |
1383 | ||
99ca4e58 MH |
1384 | /* |
1385 | * vmcmd shutdown action: Trigger vm command on shutdown. | |
1386 | */ | |
1387 | ||
1388 | static char vmcmd_on_reboot[128]; | |
1389 | static char vmcmd_on_panic[128]; | |
1390 | static char vmcmd_on_halt[128]; | |
1391 | static char vmcmd_on_poff[128]; | |
1392 | ||
1393 | DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot); | |
1394 | DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic); | |
1395 | DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt); | |
1396 | DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff); | |
1397 | ||
1398 | static struct attribute *vmcmd_attrs[] = { | |
1399 | &sys_vmcmd_on_reboot_attr.attr, | |
1400 | &sys_vmcmd_on_panic_attr.attr, | |
1401 | &sys_vmcmd_on_halt_attr.attr, | |
1402 | &sys_vmcmd_on_poff_attr.attr, | |
1403 | NULL, | |
1404 | }; | |
1405 | ||
1406 | static struct attribute_group vmcmd_attr_group = { | |
1407 | .attrs = vmcmd_attrs, | |
1408 | }; | |
1409 | ||
1410 | static struct kset *vmcmd_kset; | |
1411 | ||
1412 | static void vmcmd_run(struct shutdown_trigger *trigger) | |
ff6b8ea6 | 1413 | { |
99ca4e58 MH |
1414 | char *cmd, *next_cmd; |
1415 | ||
1416 | if (strcmp(trigger->name, ON_REIPL_STR) == 0) | |
1417 | cmd = vmcmd_on_reboot; | |
1418 | else if (strcmp(trigger->name, ON_PANIC_STR) == 0) | |
1419 | cmd = vmcmd_on_panic; | |
1420 | else if (strcmp(trigger->name, ON_HALT_STR) == 0) | |
1421 | cmd = vmcmd_on_halt; | |
1422 | else if (strcmp(trigger->name, ON_POFF_STR) == 0) | |
1423 | cmd = vmcmd_on_poff; | |
1424 | else | |
1425 | return; | |
1426 | ||
1427 | if (strlen(cmd) == 0) | |
1428 | return; | |
1429 | do { | |
1430 | next_cmd = strchr(cmd, '\n'); | |
1431 | if (next_cmd) { | |
1432 | next_cmd[0] = 0; | |
1433 | next_cmd += 1; | |
1434 | } | |
1435 | __cpcmd(cmd, NULL, 0, NULL); | |
1436 | cmd = next_cmd; | |
1437 | } while (cmd != NULL); | |
1438 | } | |
1439 | ||
1440 | static int vmcmd_init(void) | |
1441 | { | |
1442 | if (!MACHINE_IS_VM) | |
1443 | return -ENOTSUPP; | |
1444 | vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj); | |
1445 | if (!vmcmd_kset) | |
1446 | return -ENOMEM; | |
1447 | return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group); | |
1448 | } | |
1449 | ||
1450 | static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR, | |
1451 | vmcmd_run, vmcmd_init}; | |
1452 | ||
1453 | /* | |
1454 | * stop shutdown action: Stop Linux on shutdown. | |
1455 | */ | |
1456 | ||
1457 | static void stop_run(struct shutdown_trigger *trigger) | |
1458 | { | |
c6547497 MH |
1459 | if (strcmp(trigger->name, ON_PANIC_STR) == 0) |
1460 | disabled_wait((unsigned long) __builtin_return_address(0)); | |
1461 | else { | |
1462 | signal_processor(smp_processor_id(), sigp_stop); | |
1463 | for (;;); | |
1464 | } | |
99ca4e58 MH |
1465 | } |
1466 | ||
1467 | static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR, | |
1468 | stop_run, NULL}; | |
1469 | ||
1470 | /* action list */ | |
1471 | ||
1472 | static struct shutdown_action *shutdown_actions_list[] = { | |
099b7651 FM |
1473 | &ipl_action, &reipl_action, &dump_reipl_action, &dump_action, |
1474 | &vmcmd_action, &stop_action}; | |
99ca4e58 MH |
1475 | #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *)) |
1476 | ||
1477 | /* | |
1478 | * Trigger section | |
1479 | */ | |
1480 | ||
1481 | static struct kset *shutdown_actions_kset; | |
1482 | ||
1483 | static int set_trigger(const char *buf, struct shutdown_trigger *trigger, | |
1484 | size_t len) | |
1485 | { | |
1486 | int i; | |
099b7651 | 1487 | |
99ca4e58 MH |
1488 | for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) { |
1489 | if (!shutdown_actions_list[i]) | |
1490 | continue; | |
099b7651 | 1491 | if (sysfs_streq(buf, shutdown_actions_list[i]->name)) { |
99ca4e58 MH |
1492 | trigger->action = shutdown_actions_list[i]; |
1493 | return len; | |
1494 | } | |
1495 | } | |
1496 | return -EINVAL; | |
1497 | } | |
1498 | ||
1499 | /* on reipl */ | |
1500 | ||
1501 | static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR, | |
1502 | &reipl_action}; | |
1503 | ||
1504 | static ssize_t on_reboot_show(struct kobject *kobj, | |
1505 | struct kobj_attribute *attr, char *page) | |
1506 | { | |
1507 | return sprintf(page, "%s\n", on_reboot_trigger.action->name); | |
1508 | } | |
1509 | ||
1510 | static ssize_t on_reboot_store(struct kobject *kobj, | |
1511 | struct kobj_attribute *attr, | |
1512 | const char *buf, size_t len) | |
1513 | { | |
1514 | return set_trigger(buf, &on_reboot_trigger, len); | |
1515 | } | |
1516 | ||
1517 | static struct kobj_attribute on_reboot_attr = | |
1518 | __ATTR(on_reboot, 0644, on_reboot_show, on_reboot_store); | |
1519 | ||
1520 | static void do_machine_restart(char *__unused) | |
1521 | { | |
1522 | smp_send_stop(); | |
1523 | on_reboot_trigger.action->fn(&on_reboot_trigger); | |
1524 | reipl_run(NULL); | |
1525 | } | |
1526 | void (*_machine_restart)(char *command) = do_machine_restart; | |
1527 | ||
1528 | /* on panic */ | |
1529 | ||
1530 | static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action}; | |
1531 | ||
1532 | static ssize_t on_panic_show(struct kobject *kobj, | |
1533 | struct kobj_attribute *attr, char *page) | |
1534 | { | |
1535 | return sprintf(page, "%s\n", on_panic_trigger.action->name); | |
1536 | } | |
1537 | ||
1538 | static ssize_t on_panic_store(struct kobject *kobj, | |
1539 | struct kobj_attribute *attr, | |
1540 | const char *buf, size_t len) | |
1541 | { | |
1542 | return set_trigger(buf, &on_panic_trigger, len); | |
1543 | } | |
1544 | ||
1545 | static struct kobj_attribute on_panic_attr = | |
1546 | __ATTR(on_panic, 0644, on_panic_show, on_panic_store); | |
1547 | ||
1548 | static void do_panic(void) | |
1549 | { | |
1550 | on_panic_trigger.action->fn(&on_panic_trigger); | |
1551 | stop_run(&on_panic_trigger); | |
1552 | } | |
1553 | ||
1554 | /* on halt */ | |
1555 | ||
1556 | static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action}; | |
1557 | ||
1558 | static ssize_t on_halt_show(struct kobject *kobj, | |
1559 | struct kobj_attribute *attr, char *page) | |
1560 | { | |
1561 | return sprintf(page, "%s\n", on_halt_trigger.action->name); | |
1562 | } | |
1563 | ||
1564 | static ssize_t on_halt_store(struct kobject *kobj, | |
1565 | struct kobj_attribute *attr, | |
1566 | const char *buf, size_t len) | |
1567 | { | |
1568 | return set_trigger(buf, &on_halt_trigger, len); | |
1569 | } | |
1570 | ||
1571 | static struct kobj_attribute on_halt_attr = | |
1572 | __ATTR(on_halt, 0644, on_halt_show, on_halt_store); | |
ff6b8ea6 | 1573 | |
99ca4e58 MH |
1574 | |
1575 | static void do_machine_halt(void) | |
1576 | { | |
1577 | smp_send_stop(); | |
1578 | on_halt_trigger.action->fn(&on_halt_trigger); | |
1579 | stop_run(&on_halt_trigger); | |
1580 | } | |
1581 | void (*_machine_halt)(void) = do_machine_halt; | |
1582 | ||
1583 | /* on power off */ | |
1584 | ||
1585 | static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action}; | |
1586 | ||
1587 | static ssize_t on_poff_show(struct kobject *kobj, | |
1588 | struct kobj_attribute *attr, char *page) | |
1589 | { | |
1590 | return sprintf(page, "%s\n", on_poff_trigger.action->name); | |
1591 | } | |
1592 | ||
1593 | static ssize_t on_poff_store(struct kobject *kobj, | |
1594 | struct kobj_attribute *attr, | |
1595 | const char *buf, size_t len) | |
1596 | { | |
1597 | return set_trigger(buf, &on_poff_trigger, len); | |
1598 | } | |
1599 | ||
1600 | static struct kobj_attribute on_poff_attr = | |
1601 | __ATTR(on_poff, 0644, on_poff_show, on_poff_store); | |
1602 | ||
1603 | ||
1604 | static void do_machine_power_off(void) | |
1605 | { | |
1606 | smp_send_stop(); | |
1607 | on_poff_trigger.action->fn(&on_poff_trigger); | |
1608 | stop_run(&on_poff_trigger); | |
1609 | } | |
1610 | void (*_machine_power_off)(void) = do_machine_power_off; | |
1611 | ||
1612 | static void __init shutdown_triggers_init(void) | |
1613 | { | |
d91885be | 1614 | shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL, |
f62ed9e3 | 1615 | firmware_kobj); |
d91885be | 1616 | if (!shutdown_actions_kset) |
99ca4e58 MH |
1617 | goto fail; |
1618 | if (sysfs_create_file(&shutdown_actions_kset->kobj, | |
1619 | &on_reboot_attr.attr)) | |
1620 | goto fail; | |
1621 | if (sysfs_create_file(&shutdown_actions_kset->kobj, | |
1622 | &on_panic_attr.attr)) | |
1623 | goto fail; | |
1624 | if (sysfs_create_file(&shutdown_actions_kset->kobj, | |
1625 | &on_halt_attr.attr)) | |
1626 | goto fail; | |
1627 | if (sysfs_create_file(&shutdown_actions_kset->kobj, | |
1628 | &on_poff_attr.attr)) | |
1629 | goto fail; | |
1630 | ||
1631 | return; | |
1632 | fail: | |
1633 | panic("shutdown_triggers_init failed\n"); | |
1634 | } | |
1635 | ||
1636 | static void __init shutdown_actions_init(void) | |
1637 | { | |
1638 | int i; | |
1639 | ||
1640 | for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) { | |
1641 | if (!shutdown_actions_list[i]->init) | |
1642 | continue; | |
1643 | if (shutdown_actions_list[i]->init()) | |
1644 | shutdown_actions_list[i] = NULL; | |
ff6b8ea6 | 1645 | } |
ff6b8ea6 MH |
1646 | } |
1647 | ||
1648 | static int __init s390_ipl_init(void) | |
1649 | { | |
d09293ae | 1650 | sclp_get_ipl_info(&sclp_ipl_info); |
99ca4e58 MH |
1651 | shutdown_actions_init(); |
1652 | shutdown_triggers_init(); | |
ff6b8ea6 MH |
1653 | return 0; |
1654 | } | |
1655 | ||
1656 | __initcall(s390_ipl_init); | |
15e9b586 | 1657 | |
99ca4e58 MH |
1658 | static void __init strncpy_skip_quote(char *dst, char *src, int n) |
1659 | { | |
1660 | int sx, dx; | |
1661 | ||
1662 | dx = 0; | |
1663 | for (sx = 0; src[sx] != 0; sx++) { | |
1664 | if (src[sx] == '"') | |
1665 | continue; | |
1666 | dst[dx++] = src[sx]; | |
1667 | if (dx >= n) | |
1668 | break; | |
1669 | } | |
1670 | } | |
1671 | ||
1672 | static int __init vmcmd_on_reboot_setup(char *str) | |
1673 | { | |
1674 | if (!MACHINE_IS_VM) | |
1675 | return 1; | |
1676 | strncpy_skip_quote(vmcmd_on_reboot, str, 127); | |
1677 | vmcmd_on_reboot[127] = 0; | |
1678 | on_reboot_trigger.action = &vmcmd_action; | |
1679 | return 1; | |
1680 | } | |
1681 | __setup("vmreboot=", vmcmd_on_reboot_setup); | |
1682 | ||
1683 | static int __init vmcmd_on_panic_setup(char *str) | |
1684 | { | |
1685 | if (!MACHINE_IS_VM) | |
1686 | return 1; | |
1687 | strncpy_skip_quote(vmcmd_on_panic, str, 127); | |
1688 | vmcmd_on_panic[127] = 0; | |
1689 | on_panic_trigger.action = &vmcmd_action; | |
1690 | return 1; | |
1691 | } | |
1692 | __setup("vmpanic=", vmcmd_on_panic_setup); | |
1693 | ||
1694 | static int __init vmcmd_on_halt_setup(char *str) | |
1695 | { | |
1696 | if (!MACHINE_IS_VM) | |
1697 | return 1; | |
1698 | strncpy_skip_quote(vmcmd_on_halt, str, 127); | |
1699 | vmcmd_on_halt[127] = 0; | |
1700 | on_halt_trigger.action = &vmcmd_action; | |
1701 | return 1; | |
1702 | } | |
1703 | __setup("vmhalt=", vmcmd_on_halt_setup); | |
1704 | ||
1705 | static int __init vmcmd_on_poff_setup(char *str) | |
1706 | { | |
1707 | if (!MACHINE_IS_VM) | |
1708 | return 1; | |
1709 | strncpy_skip_quote(vmcmd_on_poff, str, 127); | |
1710 | vmcmd_on_poff[127] = 0; | |
1711 | on_poff_trigger.action = &vmcmd_action; | |
1712 | return 1; | |
1713 | } | |
1714 | __setup("vmpoff=", vmcmd_on_poff_setup); | |
1715 | ||
1716 | static int on_panic_notify(struct notifier_block *self, | |
1717 | unsigned long event, void *data) | |
1718 | { | |
1719 | do_panic(); | |
1720 | return NOTIFY_OK; | |
1721 | } | |
1722 | ||
1723 | static struct notifier_block on_panic_nb = { | |
1724 | .notifier_call = on_panic_notify, | |
7e9b580e | 1725 | .priority = INT_MIN, |
99ca4e58 MH |
1726 | }; |
1727 | ||
1728 | void __init setup_ipl(void) | |
1729 | { | |
1730 | ipl_info.type = get_ipl_type(); | |
1731 | switch (ipl_info.type) { | |
1732 | case IPL_TYPE_CCW: | |
1733 | ipl_info.data.ccw.dev_id.devno = ipl_devno; | |
1734 | ipl_info.data.ccw.dev_id.ssid = 0; | |
1735 | break; | |
1736 | case IPL_TYPE_FCP: | |
1737 | case IPL_TYPE_FCP_DUMP: | |
1738 | ipl_info.data.fcp.dev_id.devno = | |
1739 | IPL_PARMBLOCK_START->ipl_info.fcp.devno; | |
1740 | ipl_info.data.fcp.dev_id.ssid = 0; | |
1741 | ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn; | |
1742 | ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun; | |
1743 | break; | |
1744 | case IPL_TYPE_NSS: | |
1745 | strncpy(ipl_info.data.nss.name, kernel_nss_name, | |
1746 | sizeof(ipl_info.data.nss.name)); | |
1747 | break; | |
1748 | case IPL_TYPE_UNKNOWN: | |
99ca4e58 MH |
1749 | /* We have no info to copy */ |
1750 | break; | |
1751 | } | |
1752 | atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb); | |
1753 | } | |
1754 | ||
a0443fbb HB |
1755 | void __init ipl_update_parameters(void) |
1756 | { | |
3a95e8eb MH |
1757 | int rc; |
1758 | ||
1759 | rc = diag308(DIAG308_STORE, &ipl_block); | |
1760 | if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG)) | |
a0443fbb HB |
1761 | diag308_set_works = 1; |
1762 | } | |
1763 | ||
6fc321fd HC |
1764 | void __init ipl_save_parameters(void) |
1765 | { | |
1766 | struct cio_iplinfo iplinfo; | |
1767 | unsigned int *ipl_ptr; | |
1768 | void *src, *dst; | |
1769 | ||
1770 | if (cio_get_iplinfo(&iplinfo)) | |
1771 | return; | |
1772 | ||
1773 | ipl_devno = iplinfo.devno; | |
1774 | ipl_flags |= IPL_DEVNO_VALID; | |
1775 | if (!iplinfo.is_qdio) | |
1776 | return; | |
1777 | ipl_flags |= IPL_PARMBLOCK_VALID; | |
1778 | ipl_ptr = (unsigned int *)__LC_IPL_PARMBLOCK_PTR; | |
1779 | src = (void *)(unsigned long)*ipl_ptr; | |
1780 | dst = (void *)IPL_PARMBLOCK_ORIGIN; | |
1781 | memmove(dst, src, PAGE_SIZE); | |
1782 | *ipl_ptr = IPL_PARMBLOCK_ORIGIN; | |
1783 | } | |
1784 | ||
15e9b586 HC |
1785 | static LIST_HEAD(rcall); |
1786 | static DEFINE_MUTEX(rcall_mutex); | |
1787 | ||
1788 | void register_reset_call(struct reset_call *reset) | |
1789 | { | |
1790 | mutex_lock(&rcall_mutex); | |
1791 | list_add(&reset->list, &rcall); | |
1792 | mutex_unlock(&rcall_mutex); | |
1793 | } | |
1794 | EXPORT_SYMBOL_GPL(register_reset_call); | |
1795 | ||
1796 | void unregister_reset_call(struct reset_call *reset) | |
1797 | { | |
1798 | mutex_lock(&rcall_mutex); | |
1799 | list_del(&reset->list); | |
1800 | mutex_unlock(&rcall_mutex); | |
1801 | } | |
1802 | EXPORT_SYMBOL_GPL(unregister_reset_call); | |
1803 | ||
1804 | static void do_reset_calls(void) | |
1805 | { | |
1806 | struct reset_call *reset; | |
1807 | ||
1808 | list_for_each_entry(reset, &rcall, list) | |
1809 | reset->fn(); | |
1810 | } | |
1811 | ||
c5dd8586 | 1812 | u32 dump_prefix_page; |
15e9b586 HC |
1813 | |
1814 | void s390_reset_system(void) | |
1815 | { | |
1816 | struct _lowcore *lc; | |
1817 | ||
15e9b586 | 1818 | lc = (struct _lowcore *)(unsigned long) store_prefix(); |
a45e1414 MH |
1819 | |
1820 | /* Stack for interrupt/machine check handler */ | |
15e9b586 HC |
1821 | lc->panic_stack = S390_lowcore.panic_stack; |
1822 | ||
da1cf23e | 1823 | /* Save prefix page address for dump case */ |
c5dd8586 | 1824 | dump_prefix_page = (u32)(unsigned long) lc; |
da1cf23e | 1825 | |
15e9b586 HC |
1826 | /* Disable prefixing */ |
1827 | set_prefix(0); | |
1828 | ||
1829 | /* Disable lowcore protection */ | |
1830 | __ctl_clear_bit(0,28); | |
1831 | ||
1832 | /* Set new machine check handler */ | |
c1821c2e | 1833 | S390_lowcore.mcck_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK; |
15e9b586 | 1834 | S390_lowcore.mcck_new_psw.addr = |
ab14de6c | 1835 | PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler; |
a45e1414 MH |
1836 | |
1837 | /* Set new program check handler */ | |
c1821c2e | 1838 | S390_lowcore.program_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK; |
a45e1414 | 1839 | S390_lowcore.program_new_psw.addr = |
ab14de6c | 1840 | PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler; |
a45e1414 | 1841 | |
15e9b586 HC |
1842 | do_reset_calls(); |
1843 | } | |
99ca4e58 | 1844 |