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Commit | Line | Data |
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ff6b8ea6 | 1 | /* |
ff6b8ea6 MH |
2 | * ipl/reipl/dump support for Linux on s390. |
3 | * | |
a53c8fab | 4 | * Copyright IBM Corp. 2005, 2012 |
ff6b8ea6 MH |
5 | * Author(s): Michael Holzheu <holzheu@de.ibm.com> |
6 | * Heiko Carstens <heiko.carstens@de.ibm.com> | |
7 | * Volker Sameske <sameske@de.ibm.com> | |
8 | */ | |
9 | ||
10 | #include <linux/types.h> | |
3994a52b PG |
11 | #include <linux/export.h> |
12 | #include <linux/init.h> | |
ff6b8ea6 MH |
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> |
5a0e3ad6 | 18 | #include <linux/gfp.h> |
60a0c68d | 19 | #include <linux/crash_dump.h> |
3ab121ab | 20 | #include <linux/debug_locks.h> |
1ec2772e | 21 | #include <asm/diag.h> |
46b05d26 | 22 | #include <asm/ipl.h> |
ff6b8ea6 MH |
23 | #include <asm/smp.h> |
24 | #include <asm/setup.h> | |
25 | #include <asm/cpcmd.h> | |
26 | #include <asm/cio.h> | |
03a4d208 | 27 | #include <asm/ebcdic.h> |
15e9b586 | 28 | #include <asm/reset.h> |
ab14de6c | 29 | #include <asm/sclp.h> |
159d1ff8 | 30 | #include <asm/checksum.h> |
3ab121ab | 31 | #include <asm/debug.h> |
4857d4bb | 32 | #include <asm/os_info.h> |
638ad34a | 33 | #include "entry.h" |
ff6b8ea6 MH |
34 | |
35 | #define IPL_PARM_BLOCK_VERSION 0 | |
03a4d208 | 36 | |
411ed322 MH |
37 | #define IPL_UNKNOWN_STR "unknown" |
38 | #define IPL_CCW_STR "ccw" | |
39 | #define IPL_FCP_STR "fcp" | |
40 | #define IPL_FCP_DUMP_STR "fcp_dump" | |
41 | #define IPL_NSS_STR "nss" | |
615b04b3 | 42 | |
99ca4e58 MH |
43 | #define DUMP_CCW_STR "ccw" |
44 | #define DUMP_FCP_STR "fcp" | |
45 | #define DUMP_NONE_STR "none" | |
46 | ||
47 | /* | |
48 | * Four shutdown trigger types are supported: | |
49 | * - panic | |
50 | * - halt | |
51 | * - power off | |
52 | * - reipl | |
7dd6b334 | 53 | * - restart |
99ca4e58 MH |
54 | */ |
55 | #define ON_PANIC_STR "on_panic" | |
56 | #define ON_HALT_STR "on_halt" | |
57 | #define ON_POFF_STR "on_poff" | |
58 | #define ON_REIPL_STR "on_reboot" | |
7dd6b334 | 59 | #define ON_RESTART_STR "on_restart" |
99ca4e58 MH |
60 | |
61 | struct shutdown_action; | |
62 | struct shutdown_trigger { | |
63 | char *name; | |
64 | struct shutdown_action *action; | |
65 | }; | |
66 | ||
67 | /* | |
099b7651 | 68 | * The following shutdown action types are supported: |
99ca4e58 MH |
69 | */ |
70 | #define SHUTDOWN_ACTION_IPL_STR "ipl" | |
71 | #define SHUTDOWN_ACTION_REIPL_STR "reipl" | |
72 | #define SHUTDOWN_ACTION_DUMP_STR "dump" | |
73 | #define SHUTDOWN_ACTION_VMCMD_STR "vmcmd" | |
74 | #define SHUTDOWN_ACTION_STOP_STR "stop" | |
099b7651 | 75 | #define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl" |
99ca4e58 MH |
76 | |
77 | struct shutdown_action { | |
78 | char *name; | |
79 | void (*fn) (struct shutdown_trigger *trigger); | |
80 | int (*init) (void); | |
81088819 | 81 | int init_rc; |
99ca4e58 MH |
82 | }; |
83 | ||
ff6b8ea6 MH |
84 | static char *ipl_type_str(enum ipl_type type) |
85 | { | |
86 | switch (type) { | |
ff6b8ea6 MH |
87 | case IPL_TYPE_CCW: |
88 | return IPL_CCW_STR; | |
89 | case IPL_TYPE_FCP: | |
90 | return IPL_FCP_STR; | |
411ed322 MH |
91 | case IPL_TYPE_FCP_DUMP: |
92 | return IPL_FCP_DUMP_STR; | |
fe355b7f HY |
93 | case IPL_TYPE_NSS: |
94 | return IPL_NSS_STR; | |
ff6b8ea6 MH |
95 | case IPL_TYPE_UNKNOWN: |
96 | default: | |
97 | return IPL_UNKNOWN_STR; | |
98 | } | |
99 | } | |
100 | ||
411ed322 MH |
101 | enum dump_type { |
102 | DUMP_TYPE_NONE = 1, | |
103 | DUMP_TYPE_CCW = 2, | |
104 | DUMP_TYPE_FCP = 4, | |
105 | }; | |
106 | ||
411ed322 MH |
107 | static char *dump_type_str(enum dump_type type) |
108 | { | |
109 | switch (type) { | |
110 | case DUMP_TYPE_NONE: | |
111 | return DUMP_NONE_STR; | |
112 | case DUMP_TYPE_CCW: | |
113 | return DUMP_CCW_STR; | |
114 | case DUMP_TYPE_FCP: | |
115 | return DUMP_FCP_STR; | |
116 | default: | |
117 | return NULL; | |
118 | } | |
119 | } | |
120 | ||
121 | /* | |
122 | * Must be in data section since the bss section | |
123 | * is not cleared when these are accessed. | |
124 | */ | |
72a9b02d HC |
125 | static u8 ipl_ssid __section(.data) = 0; |
126 | static u16 ipl_devno __section(.data) = 0; | |
127 | u32 ipl_flags __section(.data) = 0; | |
411ed322 | 128 | |
ff6b8ea6 | 129 | enum ipl_method { |
411ed322 MH |
130 | REIPL_METHOD_CCW_CIO, |
131 | REIPL_METHOD_CCW_DIAG, | |
132 | REIPL_METHOD_CCW_VM, | |
133 | REIPL_METHOD_FCP_RO_DIAG, | |
134 | REIPL_METHOD_FCP_RW_DIAG, | |
135 | REIPL_METHOD_FCP_RO_VM, | |
136 | REIPL_METHOD_FCP_DUMP, | |
137 | REIPL_METHOD_NSS, | |
a0443fbb | 138 | REIPL_METHOD_NSS_DIAG, |
411ed322 MH |
139 | REIPL_METHOD_DEFAULT, |
140 | }; | |
141 | ||
142 | enum dump_method { | |
143 | DUMP_METHOD_NONE, | |
144 | DUMP_METHOD_CCW_CIO, | |
145 | DUMP_METHOD_CCW_DIAG, | |
146 | DUMP_METHOD_CCW_VM, | |
147 | DUMP_METHOD_FCP_DIAG, | |
ff6b8ea6 MH |
148 | }; |
149 | ||
ff6b8ea6 MH |
150 | static int diag308_set_works = 0; |
151 | ||
a0443fbb HB |
152 | static struct ipl_parameter_block ipl_block; |
153 | ||
ff6b8ea6 | 154 | static int reipl_capabilities = IPL_TYPE_UNKNOWN; |
fe355b7f | 155 | |
ff6b8ea6 | 156 | static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN; |
411ed322 | 157 | static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT; |
ff6b8ea6 MH |
158 | static struct ipl_parameter_block *reipl_block_fcp; |
159 | static struct ipl_parameter_block *reipl_block_ccw; | |
a0443fbb | 160 | static struct ipl_parameter_block *reipl_block_nss; |
099b7651 | 161 | static struct ipl_parameter_block *reipl_block_actual; |
fe355b7f | 162 | |
411ed322 MH |
163 | static int dump_capabilities = DUMP_TYPE_NONE; |
164 | static enum dump_type dump_type = DUMP_TYPE_NONE; | |
165 | static enum dump_method dump_method = DUMP_METHOD_NONE; | |
ff6b8ea6 MH |
166 | static struct ipl_parameter_block *dump_block_fcp; |
167 | static struct ipl_parameter_block *dump_block_ccw; | |
168 | ||
05dd2530 HC |
169 | static struct sclp_ipl_info sclp_ipl_info; |
170 | ||
1ec2772e | 171 | static inline int __diag308(unsigned long subcode, void *addr) |
ff6b8ea6 | 172 | { |
94c12cc7 | 173 | register unsigned long _addr asm("0") = (unsigned long) addr; |
ff6b8ea6 MH |
174 | register unsigned long _rc asm("1") = 0; |
175 | ||
94c12cc7 MS |
176 | asm volatile( |
177 | " diag %0,%2,0x308\n" | |
6c22c986 | 178 | "0: nopr %%r7\n" |
94c12cc7 | 179 | EX_TABLE(0b,0b) |
ff6b8ea6 | 180 | : "+d" (_addr), "+d" (_rc) |
94c12cc7 | 181 | : "d" (subcode) : "cc", "memory"); |
ff6b8ea6 MH |
182 | return _rc; |
183 | } | |
1ec2772e MS |
184 | |
185 | int diag308(unsigned long subcode, void *addr) | |
186 | { | |
187 | diag_stat_inc(DIAG_STAT_X308); | |
188 | return __diag308(subcode, addr); | |
189 | } | |
411ed322 | 190 | EXPORT_SYMBOL_GPL(diag308); |
ff6b8ea6 MH |
191 | |
192 | /* SYSFS */ | |
193 | ||
3be7ae63 | 194 | #define IPL_ATTR_SHOW_FN(_prefix, _name, _format, args...) \ |
9b949165 GKH |
195 | static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \ |
196 | struct kobj_attribute *attr, \ | |
ff6b8ea6 MH |
197 | char *page) \ |
198 | { \ | |
3be7ae63 SO |
199 | return snprintf(page, PAGE_SIZE, _format, ##args); \ |
200 | } | |
201 | ||
18e22a17 SO |
202 | #define IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk) \ |
203 | static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \ | |
204 | struct kobj_attribute *attr, \ | |
205 | const char *buf, size_t len) \ | |
206 | { \ | |
207 | unsigned long long ssid, devno; \ | |
208 | \ | |
209 | if (sscanf(buf, "0.%llx.%llx\n", &ssid, &devno) != 2) \ | |
210 | return -EINVAL; \ | |
211 | \ | |
212 | if (ssid > __MAX_SSID || devno > __MAX_SUBCHANNEL) \ | |
213 | return -EINVAL; \ | |
214 | \ | |
215 | _ipl_blk.ssid = ssid; \ | |
216 | _ipl_blk.devno = devno; \ | |
217 | return len; \ | |
218 | } | |
219 | ||
220 | #define DEFINE_IPL_CCW_ATTR_RW(_prefix, _name, _ipl_blk) \ | |
221 | IPL_ATTR_SHOW_FN(_prefix, _name, "0.%x.%04x\n", \ | |
222 | _ipl_blk.ssid, _ipl_blk.devno); \ | |
223 | IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk); \ | |
224 | static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ | |
225 | __ATTR(_name, (S_IRUGO | S_IWUSR), \ | |
226 | sys_##_prefix##_##_name##_show, \ | |
227 | sys_##_prefix##_##_name##_store) \ | |
228 | ||
3be7ae63 SO |
229 | #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \ |
230 | IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value) \ | |
9b949165 | 231 | static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ |
3be7ae63 | 232 | __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL) |
ff6b8ea6 MH |
233 | |
234 | #define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \ | |
3be7ae63 | 235 | IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value) \ |
9b949165 GKH |
236 | static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \ |
237 | struct kobj_attribute *attr, \ | |
ff6b8ea6 MH |
238 | const char *buf, size_t len) \ |
239 | { \ | |
240 | unsigned long long value; \ | |
241 | if (sscanf(buf, _fmt_in, &value) != 1) \ | |
242 | return -EINVAL; \ | |
243 | _value = value; \ | |
244 | return len; \ | |
245 | } \ | |
9b949165 | 246 | static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ |
ff6b8ea6 MH |
247 | __ATTR(_name,(S_IRUGO | S_IWUSR), \ |
248 | sys_##_prefix##_##_name##_show, \ | |
3be7ae63 | 249 | sys_##_prefix##_##_name##_store) |
ff6b8ea6 | 250 | |
fe355b7f | 251 | #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\ |
3be7ae63 | 252 | IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, _value) \ |
9b949165 GKH |
253 | static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \ |
254 | struct kobj_attribute *attr, \ | |
fe355b7f HY |
255 | const char *buf, size_t len) \ |
256 | { \ | |
99ca4e58 | 257 | strncpy(_value, buf, sizeof(_value) - 1); \ |
1d802e24 | 258 | strim(_value); \ |
fe355b7f HY |
259 | return len; \ |
260 | } \ | |
9b949165 | 261 | static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ |
fe355b7f HY |
262 | __ATTR(_name,(S_IRUGO | S_IWUSR), \ |
263 | sys_##_prefix##_##_name##_show, \ | |
3be7ae63 | 264 | sys_##_prefix##_##_name##_store) |
fe355b7f | 265 | |
ff6b8ea6 MH |
266 | static void make_attrs_ro(struct attribute **attrs) |
267 | { | |
268 | while (*attrs) { | |
269 | (*attrs)->mode = S_IRUGO; | |
270 | attrs++; | |
271 | } | |
272 | } | |
273 | ||
274 | /* | |
275 | * ipl section | |
276 | */ | |
277 | ||
411ed322 | 278 | static __init enum ipl_type get_ipl_type(void) |
ff6b8ea6 MH |
279 | { |
280 | struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START; | |
281 | ||
fe355b7f HY |
282 | if (ipl_flags & IPL_NSS_VALID) |
283 | return IPL_TYPE_NSS; | |
e87bfe51 | 284 | if (!(ipl_flags & IPL_DEVNO_VALID)) |
ff6b8ea6 | 285 | return IPL_TYPE_UNKNOWN; |
e87bfe51 | 286 | if (!(ipl_flags & IPL_PARMBLOCK_VALID)) |
ff6b8ea6 MH |
287 | return IPL_TYPE_CCW; |
288 | if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION) | |
289 | return IPL_TYPE_UNKNOWN; | |
290 | if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP) | |
291 | return IPL_TYPE_UNKNOWN; | |
411ed322 MH |
292 | if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP) |
293 | return IPL_TYPE_FCP_DUMP; | |
ff6b8ea6 MH |
294 | return IPL_TYPE_FCP; |
295 | } | |
296 | ||
411ed322 MH |
297 | struct ipl_info ipl_info; |
298 | EXPORT_SYMBOL_GPL(ipl_info); | |
299 | ||
9b949165 GKH |
300 | static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr, |
301 | char *page) | |
ff6b8ea6 | 302 | { |
411ed322 | 303 | return sprintf(page, "%s\n", ipl_type_str(ipl_info.type)); |
ff6b8ea6 MH |
304 | } |
305 | ||
9b949165 | 306 | static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type); |
ff6b8ea6 | 307 | |
a0443fbb | 308 | /* VM IPL PARM routines */ |
c4736d96 MS |
309 | static size_t reipl_get_ascii_vmparm(char *dest, size_t size, |
310 | const struct ipl_parameter_block *ipb) | |
a0443fbb HB |
311 | { |
312 | int i; | |
684d2fd4 | 313 | size_t len; |
a0443fbb HB |
314 | char has_lowercase = 0; |
315 | ||
684d2fd4 | 316 | len = 0; |
a0443fbb HB |
317 | if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) && |
318 | (ipb->ipl_info.ccw.vm_parm_len > 0)) { | |
319 | ||
684d2fd4 | 320 | len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len); |
a0443fbb HB |
321 | memcpy(dest, ipb->ipl_info.ccw.vm_parm, len); |
322 | /* If at least one character is lowercase, we assume mixed | |
323 | * case; otherwise we convert everything to lowercase. | |
324 | */ | |
325 | for (i = 0; i < len; i++) | |
326 | if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */ | |
327 | (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */ | |
328 | (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */ | |
329 | has_lowercase = 1; | |
330 | break; | |
331 | } | |
332 | if (!has_lowercase) | |
333 | EBC_TOLOWER(dest, len); | |
334 | EBCASC(dest, len); | |
335 | } | |
336 | dest[len] = 0; | |
684d2fd4 HB |
337 | |
338 | return len; | |
a0443fbb HB |
339 | } |
340 | ||
684d2fd4 | 341 | size_t append_ipl_vmparm(char *dest, size_t size) |
a0443fbb | 342 | { |
684d2fd4 HB |
343 | size_t rc; |
344 | ||
345 | rc = 0; | |
a0443fbb | 346 | if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW)) |
684d2fd4 | 347 | rc = reipl_get_ascii_vmparm(dest, size, &ipl_block); |
a0443fbb HB |
348 | else |
349 | dest[0] = 0; | |
684d2fd4 | 350 | return rc; |
a0443fbb HB |
351 | } |
352 | ||
353 | static ssize_t ipl_vm_parm_show(struct kobject *kobj, | |
354 | struct kobj_attribute *attr, char *page) | |
355 | { | |
356 | char parm[DIAG308_VMPARM_SIZE + 1] = {}; | |
357 | ||
684d2fd4 | 358 | append_ipl_vmparm(parm, sizeof(parm)); |
a0443fbb HB |
359 | return sprintf(page, "%s\n", parm); |
360 | } | |
361 | ||
684d2fd4 HB |
362 | static size_t scpdata_length(const char* buf, size_t count) |
363 | { | |
364 | while (count) { | |
365 | if (buf[count - 1] != '\0' && buf[count - 1] != ' ') | |
366 | break; | |
367 | count--; | |
368 | } | |
369 | return count; | |
370 | } | |
371 | ||
c4736d96 MS |
372 | static size_t reipl_append_ascii_scpdata(char *dest, size_t size, |
373 | const struct ipl_parameter_block *ipb) | |
684d2fd4 HB |
374 | { |
375 | size_t count; | |
376 | size_t i; | |
18d00acf | 377 | int has_lowercase; |
684d2fd4 HB |
378 | |
379 | count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data, | |
380 | ipb->ipl_info.fcp.scp_data_len)); | |
381 | if (!count) | |
382 | goto out; | |
383 | ||
18d00acf HB |
384 | has_lowercase = 0; |
385 | for (i = 0; i < count; i++) { | |
684d2fd4 HB |
386 | if (!isascii(ipb->ipl_info.fcp.scp_data[i])) { |
387 | count = 0; | |
388 | goto out; | |
389 | } | |
18d00acf HB |
390 | if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i])) |
391 | has_lowercase = 1; | |
392 | } | |
684d2fd4 | 393 | |
18d00acf HB |
394 | if (has_lowercase) |
395 | memcpy(dest, ipb->ipl_info.fcp.scp_data, count); | |
396 | else | |
397 | for (i = 0; i < count; i++) | |
398 | dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]); | |
684d2fd4 HB |
399 | out: |
400 | dest[count] = '\0'; | |
401 | return count; | |
402 | } | |
403 | ||
404 | size_t append_ipl_scpdata(char *dest, size_t len) | |
405 | { | |
406 | size_t rc; | |
407 | ||
408 | rc = 0; | |
409 | if (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP) | |
410 | rc = reipl_append_ascii_scpdata(dest, len, &ipl_block); | |
411 | else | |
412 | dest[0] = 0; | |
413 | return rc; | |
414 | } | |
415 | ||
416 | ||
a0443fbb HB |
417 | static struct kobj_attribute sys_ipl_vm_parm_attr = |
418 | __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL); | |
419 | ||
9b949165 GKH |
420 | static ssize_t sys_ipl_device_show(struct kobject *kobj, |
421 | struct kobj_attribute *attr, char *page) | |
ff6b8ea6 MH |
422 | { |
423 | struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START; | |
424 | ||
411ed322 | 425 | switch (ipl_info.type) { |
ff6b8ea6 | 426 | case IPL_TYPE_CCW: |
18e22a17 | 427 | return sprintf(page, "0.%x.%04x\n", ipl_ssid, ipl_devno); |
ff6b8ea6 | 428 | case IPL_TYPE_FCP: |
411ed322 | 429 | case IPL_TYPE_FCP_DUMP: |
ff6b8ea6 MH |
430 | return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno); |
431 | default: | |
432 | return 0; | |
433 | } | |
434 | } | |
435 | ||
9b949165 | 436 | static struct kobj_attribute sys_ipl_device_attr = |
ff6b8ea6 MH |
437 | __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL); |
438 | ||
2c3c8bea CW |
439 | static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj, |
440 | struct bin_attribute *attr, char *buf, | |
441 | loff_t off, size_t count) | |
ff6b8ea6 | 442 | { |
0788fea4 AM |
443 | return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START, |
444 | IPL_PARMBLOCK_SIZE); | |
ff6b8ea6 | 445 | } |
22d557ab SO |
446 | static struct bin_attribute ipl_parameter_attr = |
447 | __BIN_ATTR(binary_parameter, S_IRUGO, ipl_parameter_read, NULL, | |
448 | PAGE_SIZE); | |
ff6b8ea6 | 449 | |
2c3c8bea CW |
450 | static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj, |
451 | struct bin_attribute *attr, char *buf, | |
452 | loff_t off, size_t count) | |
ff6b8ea6 MH |
453 | { |
454 | unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len; | |
455 | void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data; | |
456 | ||
0788fea4 | 457 | return memory_read_from_buffer(buf, count, &off, scp_data, size); |
ff6b8ea6 | 458 | } |
22d557ab SO |
459 | static struct bin_attribute ipl_scp_data_attr = |
460 | __BIN_ATTR(scp_data, S_IRUGO, ipl_scp_data_read, NULL, PAGE_SIZE); | |
ff6b8ea6 | 461 | |
22d557ab SO |
462 | static struct bin_attribute *ipl_fcp_bin_attrs[] = { |
463 | &ipl_parameter_attr, | |
464 | &ipl_scp_data_attr, | |
465 | NULL, | |
ff6b8ea6 MH |
466 | }; |
467 | ||
468 | /* FCP ipl device attributes */ | |
469 | ||
470 | DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long) | |
471 | IPL_PARMBLOCK_START->ipl_info.fcp.wwpn); | |
472 | DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long) | |
473 | IPL_PARMBLOCK_START->ipl_info.fcp.lun); | |
474 | DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long) | |
475 | IPL_PARMBLOCK_START->ipl_info.fcp.bootprog); | |
476 | DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long) | |
477 | IPL_PARMBLOCK_START->ipl_info.fcp.br_lba); | |
478 | ||
9b949165 GKH |
479 | static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj, |
480 | struct kobj_attribute *attr, char *page) | |
03a4d208 MH |
481 | { |
482 | char loadparm[LOADPARM_LEN + 1] = {}; | |
483 | ||
05dd2530 | 484 | if (!sclp_ipl_info.is_valid) |
03a4d208 | 485 | return sprintf(page, "#unknown#\n"); |
05dd2530 | 486 | memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN); |
03a4d208 | 487 | EBCASC(loadparm, LOADPARM_LEN); |
1d802e24 | 488 | strim(loadparm); |
03a4d208 MH |
489 | return sprintf(page, "%s\n", loadparm); |
490 | } | |
491 | ||
9b949165 | 492 | static struct kobj_attribute sys_ipl_ccw_loadparm_attr = |
03a4d208 MH |
493 | __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL); |
494 | ||
69928601 MH |
495 | static struct attribute *ipl_fcp_attrs[] = { |
496 | &sys_ipl_type_attr.attr, | |
497 | &sys_ipl_device_attr.attr, | |
498 | &sys_ipl_fcp_wwpn_attr.attr, | |
499 | &sys_ipl_fcp_lun_attr.attr, | |
500 | &sys_ipl_fcp_bootprog_attr.attr, | |
501 | &sys_ipl_fcp_br_lba_attr.attr, | |
502 | &sys_ipl_ccw_loadparm_attr.attr, | |
503 | NULL, | |
504 | }; | |
505 | ||
506 | static struct attribute_group ipl_fcp_attr_group = { | |
507 | .attrs = ipl_fcp_attrs, | |
22d557ab | 508 | .bin_attrs = ipl_fcp_bin_attrs, |
69928601 MH |
509 | }; |
510 | ||
511 | /* CCW ipl device attributes */ | |
512 | ||
a0443fbb HB |
513 | static struct attribute *ipl_ccw_attrs_vm[] = { |
514 | &sys_ipl_type_attr.attr, | |
515 | &sys_ipl_device_attr.attr, | |
516 | &sys_ipl_ccw_loadparm_attr.attr, | |
517 | &sys_ipl_vm_parm_attr.attr, | |
518 | NULL, | |
519 | }; | |
520 | ||
521 | static struct attribute *ipl_ccw_attrs_lpar[] = { | |
ff6b8ea6 MH |
522 | &sys_ipl_type_attr.attr, |
523 | &sys_ipl_device_attr.attr, | |
03a4d208 | 524 | &sys_ipl_ccw_loadparm_attr.attr, |
ff6b8ea6 MH |
525 | NULL, |
526 | }; | |
527 | ||
a0443fbb HB |
528 | static struct attribute_group ipl_ccw_attr_group_vm = { |
529 | .attrs = ipl_ccw_attrs_vm, | |
530 | }; | |
531 | ||
532 | static struct attribute_group ipl_ccw_attr_group_lpar = { | |
533 | .attrs = ipl_ccw_attrs_lpar | |
ff6b8ea6 MH |
534 | }; |
535 | ||
fe355b7f HY |
536 | /* NSS ipl device attributes */ |
537 | ||
538 | DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name); | |
539 | ||
540 | static struct attribute *ipl_nss_attrs[] = { | |
541 | &sys_ipl_type_attr.attr, | |
542 | &sys_ipl_nss_name_attr.attr, | |
a0443fbb HB |
543 | &sys_ipl_ccw_loadparm_attr.attr, |
544 | &sys_ipl_vm_parm_attr.attr, | |
fe355b7f HY |
545 | NULL, |
546 | }; | |
547 | ||
548 | static struct attribute_group ipl_nss_attr_group = { | |
549 | .attrs = ipl_nss_attrs, | |
550 | }; | |
551 | ||
ff6b8ea6 MH |
552 | /* UNKNOWN ipl device attributes */ |
553 | ||
554 | static struct attribute *ipl_unknown_attrs[] = { | |
555 | &sys_ipl_type_attr.attr, | |
556 | NULL, | |
557 | }; | |
558 | ||
559 | static struct attribute_group ipl_unknown_attr_group = { | |
560 | .attrs = ipl_unknown_attrs, | |
561 | }; | |
562 | ||
d91885be | 563 | static struct kset *ipl_kset; |
ff6b8ea6 | 564 | |
2c2df118 | 565 | static void __ipl_run(void *unused) |
99ca4e58 | 566 | { |
7afbeb6d HC |
567 | if (MACHINE_IS_LPAR && ipl_info.type == IPL_TYPE_CCW) |
568 | diag308(DIAG308_LOAD_NORMAL_DUMP, NULL); | |
0599eead | 569 | diag308(DIAG308_LOAD_CLEAR, NULL); |
99ca4e58 MH |
570 | if (MACHINE_IS_VM) |
571 | __cpcmd("IPL", NULL, 0, NULL); | |
572 | else if (ipl_info.type == IPL_TYPE_CCW) | |
573 | reipl_ccw_dev(&ipl_info.data.ccw.dev_id); | |
574 | } | |
575 | ||
2c2df118 HC |
576 | static void ipl_run(struct shutdown_trigger *trigger) |
577 | { | |
8b646bd7 | 578 | smp_call_ipl_cpu(__ipl_run, NULL); |
2c2df118 HC |
579 | } |
580 | ||
2bc89b5e | 581 | static int __init ipl_init(void) |
99ca4e58 MH |
582 | { |
583 | int rc; | |
584 | ||
585 | ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj); | |
586 | if (!ipl_kset) { | |
587 | rc = -ENOMEM; | |
588 | goto out; | |
589 | } | |
590 | switch (ipl_info.type) { | |
591 | case IPL_TYPE_CCW: | |
a0443fbb HB |
592 | if (MACHINE_IS_VM) |
593 | rc = sysfs_create_group(&ipl_kset->kobj, | |
594 | &ipl_ccw_attr_group_vm); | |
595 | else | |
596 | rc = sysfs_create_group(&ipl_kset->kobj, | |
597 | &ipl_ccw_attr_group_lpar); | |
99ca4e58 MH |
598 | break; |
599 | case IPL_TYPE_FCP: | |
600 | case IPL_TYPE_FCP_DUMP: | |
22d557ab | 601 | rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group); |
99ca4e58 MH |
602 | break; |
603 | case IPL_TYPE_NSS: | |
604 | rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group); | |
605 | break; | |
606 | default: | |
607 | rc = sysfs_create_group(&ipl_kset->kobj, | |
608 | &ipl_unknown_attr_group); | |
609 | break; | |
610 | } | |
611 | out: | |
612 | if (rc) | |
613 | panic("ipl_init failed: rc = %i\n", rc); | |
614 | ||
615 | return 0; | |
616 | } | |
617 | ||
2bc89b5e HC |
618 | static struct shutdown_action __refdata ipl_action = { |
619 | .name = SHUTDOWN_ACTION_IPL_STR, | |
620 | .fn = ipl_run, | |
621 | .init = ipl_init, | |
622 | }; | |
99ca4e58 | 623 | |
ff6b8ea6 | 624 | /* |
99ca4e58 | 625 | * reipl shutdown action: Reboot Linux on shutdown. |
ff6b8ea6 MH |
626 | */ |
627 | ||
a0443fbb HB |
628 | /* VM IPL PARM attributes */ |
629 | static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb, | |
630 | char *page) | |
631 | { | |
632 | char vmparm[DIAG308_VMPARM_SIZE + 1] = {}; | |
633 | ||
684d2fd4 | 634 | reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb); |
a0443fbb HB |
635 | return sprintf(page, "%s\n", vmparm); |
636 | } | |
637 | ||
638 | static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb, | |
639 | size_t vmparm_max, | |
640 | const char *buf, size_t len) | |
641 | { | |
642 | int i, ip_len; | |
643 | ||
644 | /* ignore trailing newline */ | |
645 | ip_len = len; | |
646 | if ((len > 0) && (buf[len - 1] == '\n')) | |
647 | ip_len--; | |
648 | ||
649 | if (ip_len > vmparm_max) | |
650 | return -EINVAL; | |
651 | ||
652 | /* parm is used to store kernel options, check for common chars */ | |
653 | for (i = 0; i < ip_len; i++) | |
654 | if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i]))) | |
655 | return -EINVAL; | |
656 | ||
657 | memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE); | |
658 | ipb->ipl_info.ccw.vm_parm_len = ip_len; | |
659 | if (ip_len > 0) { | |
660 | ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID; | |
661 | memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len); | |
662 | ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len); | |
663 | } else { | |
664 | ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID; | |
665 | } | |
666 | ||
667 | return len; | |
668 | } | |
669 | ||
670 | /* NSS wrapper */ | |
671 | static ssize_t reipl_nss_vmparm_show(struct kobject *kobj, | |
672 | struct kobj_attribute *attr, char *page) | |
673 | { | |
674 | return reipl_generic_vmparm_show(reipl_block_nss, page); | |
675 | } | |
676 | ||
677 | static ssize_t reipl_nss_vmparm_store(struct kobject *kobj, | |
678 | struct kobj_attribute *attr, | |
679 | const char *buf, size_t len) | |
680 | { | |
681 | return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len); | |
682 | } | |
683 | ||
684 | /* CCW wrapper */ | |
685 | static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj, | |
686 | struct kobj_attribute *attr, char *page) | |
687 | { | |
688 | return reipl_generic_vmparm_show(reipl_block_ccw, page); | |
689 | } | |
690 | ||
691 | static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj, | |
692 | struct kobj_attribute *attr, | |
693 | const char *buf, size_t len) | |
694 | { | |
695 | return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len); | |
696 | } | |
697 | ||
698 | static struct kobj_attribute sys_reipl_nss_vmparm_attr = | |
699 | __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show, | |
700 | reipl_nss_vmparm_store); | |
701 | static struct kobj_attribute sys_reipl_ccw_vmparm_attr = | |
702 | __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show, | |
703 | reipl_ccw_vmparm_store); | |
704 | ||
ff6b8ea6 MH |
705 | /* FCP reipl device attributes */ |
706 | ||
2c3c8bea | 707 | static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj, |
684d2fd4 HB |
708 | struct bin_attribute *attr, |
709 | char *buf, loff_t off, size_t count) | |
710 | { | |
711 | size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len; | |
712 | void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data; | |
713 | ||
714 | return memory_read_from_buffer(buf, count, &off, scp_data, size); | |
715 | } | |
716 | ||
2c3c8bea | 717 | static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj, |
684d2fd4 HB |
718 | struct bin_attribute *attr, |
719 | char *buf, loff_t off, size_t count) | |
720 | { | |
e0bedada | 721 | size_t scpdata_len = count; |
684d2fd4 | 722 | size_t padding; |
684d2fd4 | 723 | |
684d2fd4 | 724 | |
e0bedada SO |
725 | if (off) |
726 | return -EINVAL; | |
684d2fd4 | 727 | |
e0bedada | 728 | memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf, count); |
684d2fd4 HB |
729 | if (scpdata_len % 8) { |
730 | padding = 8 - (scpdata_len % 8); | |
731 | memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len, | |
732 | 0, padding); | |
733 | scpdata_len += padding; | |
734 | } | |
735 | ||
736 | reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len; | |
737 | reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len; | |
738 | reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len; | |
739 | ||
740 | return count; | |
741 | } | |
22d557ab SO |
742 | static struct bin_attribute sys_reipl_fcp_scp_data_attr = |
743 | __BIN_ATTR(scp_data, (S_IRUGO | S_IWUSR), reipl_fcp_scpdata_read, | |
e0bedada | 744 | reipl_fcp_scpdata_write, DIAG308_SCPDATA_SIZE); |
684d2fd4 | 745 | |
22d557ab SO |
746 | static struct bin_attribute *reipl_fcp_bin_attrs[] = { |
747 | &sys_reipl_fcp_scp_data_attr, | |
748 | NULL, | |
684d2fd4 HB |
749 | }; |
750 | ||
eda4ddf7 | 751 | DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n", |
ff6b8ea6 | 752 | reipl_block_fcp->ipl_info.fcp.wwpn); |
eda4ddf7 | 753 | DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n", |
ff6b8ea6 MH |
754 | reipl_block_fcp->ipl_info.fcp.lun); |
755 | DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n", | |
756 | reipl_block_fcp->ipl_info.fcp.bootprog); | |
757 | DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n", | |
758 | reipl_block_fcp->ipl_info.fcp.br_lba); | |
759 | DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n", | |
760 | reipl_block_fcp->ipl_info.fcp.devno); | |
761 | ||
a0443fbb HB |
762 | static void reipl_get_ascii_loadparm(char *loadparm, |
763 | struct ipl_parameter_block *ibp) | |
03a4d208 | 764 | { |
69928601 | 765 | memcpy(loadparm, ibp->hdr.loadparm, LOADPARM_LEN); |
03a4d208 MH |
766 | EBCASC(loadparm, LOADPARM_LEN); |
767 | loadparm[LOADPARM_LEN] = 0; | |
1d802e24 | 768 | strim(loadparm); |
03a4d208 MH |
769 | } |
770 | ||
a0443fbb HB |
771 | static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb, |
772 | char *page) | |
03a4d208 MH |
773 | { |
774 | char buf[LOADPARM_LEN + 1]; | |
775 | ||
a0443fbb | 776 | reipl_get_ascii_loadparm(buf, ipb); |
03a4d208 MH |
777 | return sprintf(page, "%s\n", buf); |
778 | } | |
779 | ||
a0443fbb HB |
780 | static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb, |
781 | const char *buf, size_t len) | |
03a4d208 MH |
782 | { |
783 | int i, lp_len; | |
784 | ||
785 | /* ignore trailing newline */ | |
786 | lp_len = len; | |
787 | if ((len > 0) && (buf[len - 1] == '\n')) | |
788 | lp_len--; | |
789 | /* loadparm can have max 8 characters and must not start with a blank */ | |
790 | if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' '))) | |
791 | return -EINVAL; | |
792 | /* loadparm can only contain "a-z,A-Z,0-9,SP,." */ | |
793 | for (i = 0; i < lp_len; i++) { | |
794 | if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') || | |
795 | (buf[i] == '.')) | |
796 | continue; | |
797 | return -EINVAL; | |
798 | } | |
799 | /* initialize loadparm with blanks */ | |
69928601 | 800 | memset(ipb->hdr.loadparm, ' ', LOADPARM_LEN); |
03a4d208 | 801 | /* copy and convert to ebcdic */ |
69928601 MH |
802 | memcpy(ipb->hdr.loadparm, buf, lp_len); |
803 | ASCEBC(ipb->hdr.loadparm, LOADPARM_LEN); | |
03a4d208 MH |
804 | return len; |
805 | } | |
806 | ||
69928601 MH |
807 | /* FCP wrapper */ |
808 | static ssize_t reipl_fcp_loadparm_show(struct kobject *kobj, | |
809 | struct kobj_attribute *attr, char *page) | |
810 | { | |
811 | return reipl_generic_loadparm_show(reipl_block_fcp, page); | |
812 | } | |
813 | ||
814 | static ssize_t reipl_fcp_loadparm_store(struct kobject *kobj, | |
815 | struct kobj_attribute *attr, | |
816 | const char *buf, size_t len) | |
817 | { | |
818 | return reipl_generic_loadparm_store(reipl_block_fcp, buf, len); | |
819 | } | |
820 | ||
821 | static struct kobj_attribute sys_reipl_fcp_loadparm_attr = | |
822 | __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_fcp_loadparm_show, | |
823 | reipl_fcp_loadparm_store); | |
824 | ||
825 | static struct attribute *reipl_fcp_attrs[] = { | |
826 | &sys_reipl_fcp_device_attr.attr, | |
827 | &sys_reipl_fcp_wwpn_attr.attr, | |
828 | &sys_reipl_fcp_lun_attr.attr, | |
829 | &sys_reipl_fcp_bootprog_attr.attr, | |
830 | &sys_reipl_fcp_br_lba_attr.attr, | |
831 | &sys_reipl_fcp_loadparm_attr.attr, | |
832 | NULL, | |
833 | }; | |
834 | ||
835 | static struct attribute_group reipl_fcp_attr_group = { | |
836 | .attrs = reipl_fcp_attrs, | |
22d557ab | 837 | .bin_attrs = reipl_fcp_bin_attrs, |
69928601 MH |
838 | }; |
839 | ||
840 | /* CCW reipl device attributes */ | |
18e22a17 | 841 | DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ipl_info.ccw); |
69928601 | 842 | |
a0443fbb HB |
843 | /* NSS wrapper */ |
844 | static ssize_t reipl_nss_loadparm_show(struct kobject *kobj, | |
845 | struct kobj_attribute *attr, char *page) | |
846 | { | |
847 | return reipl_generic_loadparm_show(reipl_block_nss, page); | |
848 | } | |
849 | ||
850 | static ssize_t reipl_nss_loadparm_store(struct kobject *kobj, | |
851 | struct kobj_attribute *attr, | |
852 | const char *buf, size_t len) | |
853 | { | |
854 | return reipl_generic_loadparm_store(reipl_block_nss, buf, len); | |
855 | } | |
856 | ||
857 | /* CCW wrapper */ | |
858 | static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj, | |
859 | struct kobj_attribute *attr, char *page) | |
860 | { | |
861 | return reipl_generic_loadparm_show(reipl_block_ccw, page); | |
862 | } | |
863 | ||
864 | static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj, | |
865 | struct kobj_attribute *attr, | |
866 | const char *buf, size_t len) | |
867 | { | |
868 | return reipl_generic_loadparm_store(reipl_block_ccw, buf, len); | |
869 | } | |
870 | ||
9b949165 | 871 | static struct kobj_attribute sys_reipl_ccw_loadparm_attr = |
a0443fbb HB |
872 | __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show, |
873 | reipl_ccw_loadparm_store); | |
874 | ||
875 | static struct attribute *reipl_ccw_attrs_vm[] = { | |
876 | &sys_reipl_ccw_device_attr.attr, | |
877 | &sys_reipl_ccw_loadparm_attr.attr, | |
878 | &sys_reipl_ccw_vmparm_attr.attr, | |
879 | NULL, | |
880 | }; | |
03a4d208 | 881 | |
a0443fbb | 882 | static struct attribute *reipl_ccw_attrs_lpar[] = { |
ff6b8ea6 | 883 | &sys_reipl_ccw_device_attr.attr, |
03a4d208 | 884 | &sys_reipl_ccw_loadparm_attr.attr, |
ff6b8ea6 MH |
885 | NULL, |
886 | }; | |
887 | ||
a0443fbb | 888 | static struct attribute_group reipl_ccw_attr_group_vm = { |
ff6b8ea6 | 889 | .name = IPL_CCW_STR, |
a0443fbb HB |
890 | .attrs = reipl_ccw_attrs_vm, |
891 | }; | |
892 | ||
893 | static struct attribute_group reipl_ccw_attr_group_lpar = { | |
894 | .name = IPL_CCW_STR, | |
895 | .attrs = reipl_ccw_attrs_lpar, | |
ff6b8ea6 MH |
896 | }; |
897 | ||
fe355b7f HY |
898 | |
899 | /* NSS reipl device attributes */ | |
a0443fbb HB |
900 | static void reipl_get_ascii_nss_name(char *dst, |
901 | struct ipl_parameter_block *ipb) | |
902 | { | |
903 | memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE); | |
904 | EBCASC(dst, NSS_NAME_SIZE); | |
905 | dst[NSS_NAME_SIZE] = 0; | |
906 | } | |
907 | ||
908 | static ssize_t reipl_nss_name_show(struct kobject *kobj, | |
909 | struct kobj_attribute *attr, char *page) | |
910 | { | |
911 | char nss_name[NSS_NAME_SIZE + 1] = {}; | |
912 | ||
913 | reipl_get_ascii_nss_name(nss_name, reipl_block_nss); | |
914 | return sprintf(page, "%s\n", nss_name); | |
915 | } | |
916 | ||
917 | static ssize_t reipl_nss_name_store(struct kobject *kobj, | |
918 | struct kobj_attribute *attr, | |
919 | const char *buf, size_t len) | |
920 | { | |
921 | int nss_len; | |
922 | ||
923 | /* ignore trailing newline */ | |
924 | nss_len = len; | |
925 | if ((len > 0) && (buf[len - 1] == '\n')) | |
926 | nss_len--; | |
fe355b7f | 927 | |
a0443fbb HB |
928 | if (nss_len > NSS_NAME_SIZE) |
929 | return -EINVAL; | |
930 | ||
931 | memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE); | |
932 | if (nss_len > 0) { | |
933 | reipl_block_nss->ipl_info.ccw.vm_flags |= | |
934 | DIAG308_VM_FLAGS_NSS_VALID; | |
935 | memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len); | |
936 | ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len); | |
937 | EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len); | |
938 | } else { | |
939 | reipl_block_nss->ipl_info.ccw.vm_flags &= | |
940 | ~DIAG308_VM_FLAGS_NSS_VALID; | |
941 | } | |
942 | ||
943 | return len; | |
944 | } | |
945 | ||
946 | static struct kobj_attribute sys_reipl_nss_name_attr = | |
947 | __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show, | |
948 | reipl_nss_name_store); | |
949 | ||
950 | static struct kobj_attribute sys_reipl_nss_loadparm_attr = | |
951 | __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show, | |
952 | reipl_nss_loadparm_store); | |
fe355b7f HY |
953 | |
954 | static struct attribute *reipl_nss_attrs[] = { | |
955 | &sys_reipl_nss_name_attr.attr, | |
a0443fbb HB |
956 | &sys_reipl_nss_loadparm_attr.attr, |
957 | &sys_reipl_nss_vmparm_attr.attr, | |
fe355b7f HY |
958 | NULL, |
959 | }; | |
960 | ||
961 | static struct attribute_group reipl_nss_attr_group = { | |
962 | .name = IPL_NSS_STR, | |
963 | .attrs = reipl_nss_attrs, | |
964 | }; | |
965 | ||
4857d4bb MH |
966 | static void set_reipl_block_actual(struct ipl_parameter_block *reipl_block) |
967 | { | |
968 | reipl_block_actual = reipl_block; | |
969 | os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual, | |
970 | reipl_block->hdr.len); | |
971 | } | |
972 | ||
ff6b8ea6 MH |
973 | /* reipl type */ |
974 | ||
975 | static int reipl_set_type(enum ipl_type type) | |
976 | { | |
977 | if (!(reipl_capabilities & type)) | |
978 | return -EINVAL; | |
979 | ||
980 | switch(type) { | |
981 | case IPL_TYPE_CCW: | |
48657d22 MH |
982 | if (diag308_set_works) |
983 | reipl_method = REIPL_METHOD_CCW_DIAG; | |
984 | else if (MACHINE_IS_VM) | |
411ed322 | 985 | reipl_method = REIPL_METHOD_CCW_VM; |
ff6b8ea6 | 986 | else |
411ed322 | 987 | reipl_method = REIPL_METHOD_CCW_CIO; |
4857d4bb | 988 | set_reipl_block_actual(reipl_block_ccw); |
ff6b8ea6 MH |
989 | break; |
990 | case IPL_TYPE_FCP: | |
991 | if (diag308_set_works) | |
411ed322 | 992 | reipl_method = REIPL_METHOD_FCP_RW_DIAG; |
ff6b8ea6 | 993 | else if (MACHINE_IS_VM) |
411ed322 | 994 | reipl_method = REIPL_METHOD_FCP_RO_VM; |
ff6b8ea6 | 995 | else |
411ed322 | 996 | reipl_method = REIPL_METHOD_FCP_RO_DIAG; |
4857d4bb | 997 | set_reipl_block_actual(reipl_block_fcp); |
411ed322 MH |
998 | break; |
999 | case IPL_TYPE_FCP_DUMP: | |
1000 | reipl_method = REIPL_METHOD_FCP_DUMP; | |
ff6b8ea6 | 1001 | break; |
fe355b7f | 1002 | case IPL_TYPE_NSS: |
a0443fbb HB |
1003 | if (diag308_set_works) |
1004 | reipl_method = REIPL_METHOD_NSS_DIAG; | |
1005 | else | |
1006 | reipl_method = REIPL_METHOD_NSS; | |
4857d4bb | 1007 | set_reipl_block_actual(reipl_block_nss); |
411ed322 MH |
1008 | break; |
1009 | case IPL_TYPE_UNKNOWN: | |
1010 | reipl_method = REIPL_METHOD_DEFAULT; | |
fe355b7f | 1011 | break; |
ff6b8ea6 | 1012 | default: |
411ed322 | 1013 | BUG(); |
ff6b8ea6 MH |
1014 | } |
1015 | reipl_type = type; | |
1016 | return 0; | |
1017 | } | |
1018 | ||
9b949165 GKH |
1019 | static ssize_t reipl_type_show(struct kobject *kobj, |
1020 | struct kobj_attribute *attr, char *page) | |
ff6b8ea6 MH |
1021 | { |
1022 | return sprintf(page, "%s\n", ipl_type_str(reipl_type)); | |
1023 | } | |
1024 | ||
9b949165 GKH |
1025 | static ssize_t reipl_type_store(struct kobject *kobj, |
1026 | struct kobj_attribute *attr, | |
1027 | const char *buf, size_t len) | |
ff6b8ea6 MH |
1028 | { |
1029 | int rc = -EINVAL; | |
1030 | ||
1031 | if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0) | |
1032 | rc = reipl_set_type(IPL_TYPE_CCW); | |
1033 | else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0) | |
1034 | rc = reipl_set_type(IPL_TYPE_FCP); | |
fe355b7f HY |
1035 | else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0) |
1036 | rc = reipl_set_type(IPL_TYPE_NSS); | |
ff6b8ea6 MH |
1037 | return (rc != 0) ? rc : len; |
1038 | } | |
1039 | ||
9b949165 | 1040 | static struct kobj_attribute reipl_type_attr = |
99ca4e58 | 1041 | __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store); |
ff6b8ea6 | 1042 | |
d91885be | 1043 | static struct kset *reipl_kset; |
684d2fd4 | 1044 | static struct kset *reipl_fcp_kset; |
ff6b8ea6 | 1045 | |
a0443fbb HB |
1046 | static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb, |
1047 | const enum ipl_method m) | |
1048 | { | |
1049 | char loadparm[LOADPARM_LEN + 1] = {}; | |
1050 | char vmparm[DIAG308_VMPARM_SIZE + 1] = {}; | |
1051 | char nss_name[NSS_NAME_SIZE + 1] = {}; | |
1052 | size_t pos = 0; | |
1053 | ||
1054 | reipl_get_ascii_loadparm(loadparm, ipb); | |
1055 | reipl_get_ascii_nss_name(nss_name, ipb); | |
684d2fd4 | 1056 | reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb); |
a0443fbb HB |
1057 | |
1058 | switch (m) { | |
1059 | case REIPL_METHOD_CCW_VM: | |
1060 | pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno); | |
1061 | break; | |
1062 | case REIPL_METHOD_NSS: | |
1063 | pos = sprintf(dst, "IPL %s", nss_name); | |
1064 | break; | |
1065 | default: | |
1066 | break; | |
1067 | } | |
1068 | if (strlen(loadparm) > 0) | |
1069 | pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm); | |
1070 | if (strlen(vmparm) > 0) | |
1071 | sprintf(dst + pos, " PARM %s", vmparm); | |
1072 | } | |
1073 | ||
2c2df118 | 1074 | static void __reipl_run(void *unused) |
ff6b8ea6 MH |
1075 | { |
1076 | struct ccw_dev_id devid; | |
a0443fbb | 1077 | static char buf[128]; |
ff6b8ea6 | 1078 | |
ff6b8ea6 | 1079 | switch (reipl_method) { |
411ed322 | 1080 | case REIPL_METHOD_CCW_CIO: |
18e22a17 | 1081 | devid.ssid = reipl_block_ccw->ipl_info.ccw.ssid; |
ff6b8ea6 | 1082 | devid.devno = reipl_block_ccw->ipl_info.ccw.devno; |
ff6b8ea6 MH |
1083 | reipl_ccw_dev(&devid); |
1084 | break; | |
411ed322 | 1085 | case REIPL_METHOD_CCW_VM: |
a0443fbb | 1086 | get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM); |
740b5706 | 1087 | __cpcmd(buf, NULL, 0, NULL); |
ff6b8ea6 | 1088 | break; |
411ed322 | 1089 | case REIPL_METHOD_CCW_DIAG: |
ff6b8ea6 | 1090 | diag308(DIAG308_SET, reipl_block_ccw); |
0f7451ff | 1091 | if (MACHINE_IS_LPAR) |
0599eead | 1092 | diag308(DIAG308_LOAD_NORMAL_DUMP, NULL); |
0f7451ff | 1093 | else |
0599eead | 1094 | diag308(DIAG308_LOAD_CLEAR, NULL); |
ff6b8ea6 | 1095 | break; |
411ed322 | 1096 | case REIPL_METHOD_FCP_RW_DIAG: |
ff6b8ea6 | 1097 | diag308(DIAG308_SET, reipl_block_fcp); |
0599eead | 1098 | diag308(DIAG308_LOAD_CLEAR, NULL); |
ff6b8ea6 | 1099 | break; |
411ed322 | 1100 | case REIPL_METHOD_FCP_RO_DIAG: |
0599eead | 1101 | diag308(DIAG308_LOAD_CLEAR, NULL); |
ff6b8ea6 | 1102 | break; |
411ed322 | 1103 | case REIPL_METHOD_FCP_RO_VM: |
740b5706 | 1104 | __cpcmd("IPL", NULL, 0, NULL); |
ff6b8ea6 | 1105 | break; |
a0443fbb HB |
1106 | case REIPL_METHOD_NSS_DIAG: |
1107 | diag308(DIAG308_SET, reipl_block_nss); | |
0599eead | 1108 | diag308(DIAG308_LOAD_CLEAR, NULL); |
a0443fbb | 1109 | break; |
411ed322 | 1110 | case REIPL_METHOD_NSS: |
a0443fbb | 1111 | get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS); |
fe355b7f HY |
1112 | __cpcmd(buf, NULL, 0, NULL); |
1113 | break; | |
411ed322 | 1114 | case REIPL_METHOD_DEFAULT: |
ff6b8ea6 | 1115 | if (MACHINE_IS_VM) |
740b5706 | 1116 | __cpcmd("IPL", NULL, 0, NULL); |
0599eead | 1117 | diag308(DIAG308_LOAD_CLEAR, NULL); |
ff6b8ea6 | 1118 | break; |
411ed322 | 1119 | case REIPL_METHOD_FCP_DUMP: |
411ed322 | 1120 | break; |
ff6b8ea6 | 1121 | } |
208e5591 | 1122 | disabled_wait((unsigned long) __builtin_return_address(0)); |
ff6b8ea6 MH |
1123 | } |
1124 | ||
2c2df118 HC |
1125 | static void reipl_run(struct shutdown_trigger *trigger) |
1126 | { | |
8b646bd7 | 1127 | smp_call_ipl_cpu(__reipl_run, NULL); |
2c2df118 HC |
1128 | } |
1129 | ||
a0443fbb | 1130 | static void reipl_block_ccw_init(struct ipl_parameter_block *ipb) |
ff6b8ea6 | 1131 | { |
a0443fbb HB |
1132 | ipb->hdr.len = IPL_PARM_BLK_CCW_LEN; |
1133 | ipb->hdr.version = IPL_PARM_BLOCK_VERSION; | |
1134 | ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN; | |
1135 | ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW; | |
1136 | } | |
ff6b8ea6 | 1137 | |
a0443fbb HB |
1138 | static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb) |
1139 | { | |
1140 | /* LOADPARM */ | |
1141 | /* check if read scp info worked and set loadparm */ | |
1142 | if (sclp_ipl_info.is_valid) | |
69928601 | 1143 | memcpy(ipb->hdr.loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN); |
a0443fbb HB |
1144 | else |
1145 | /* read scp info failed: set empty loadparm (EBCDIC blanks) */ | |
69928601 | 1146 | memset(ipb->hdr.loadparm, 0x40, LOADPARM_LEN); |
a0443fbb HB |
1147 | ipb->hdr.flags = DIAG308_FLAGS_LP_VALID; |
1148 | ||
1149 | /* VM PARM */ | |
1150 | if (MACHINE_IS_VM && diag308_set_works && | |
1151 | (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) { | |
1152 | ||
1153 | ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID; | |
1154 | ipb->ipl_info.ccw.vm_parm_len = | |
1155 | ipl_block.ipl_info.ccw.vm_parm_len; | |
1156 | memcpy(ipb->ipl_info.ccw.vm_parm, | |
1157 | ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE); | |
1158 | } | |
ff6b8ea6 MH |
1159 | } |
1160 | ||
99ca4e58 | 1161 | static int __init reipl_nss_init(void) |
ff6b8ea6 MH |
1162 | { |
1163 | int rc; | |
1164 | ||
99ca4e58 MH |
1165 | if (!MACHINE_IS_VM) |
1166 | return 0; | |
a0443fbb HB |
1167 | |
1168 | reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL); | |
1169 | if (!reipl_block_nss) | |
1170 | return -ENOMEM; | |
1171 | ||
1172 | if (!diag308_set_works) | |
1173 | sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO; | |
1174 | ||
99ca4e58 | 1175 | rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group); |
fe355b7f HY |
1176 | if (rc) |
1177 | return rc; | |
a0443fbb HB |
1178 | |
1179 | reipl_block_ccw_init(reipl_block_nss); | |
1180 | if (ipl_info.type == IPL_TYPE_NSS) { | |
1181 | memset(reipl_block_nss->ipl_info.ccw.nss_name, | |
1182 | ' ', NSS_NAME_SIZE); | |
1183 | memcpy(reipl_block_nss->ipl_info.ccw.nss_name, | |
1184 | kernel_nss_name, strlen(kernel_nss_name)); | |
1185 | ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE); | |
1186 | reipl_block_nss->ipl_info.ccw.vm_flags |= | |
1187 | DIAG308_VM_FLAGS_NSS_VALID; | |
1188 | ||
1189 | reipl_block_ccw_fill_parms(reipl_block_nss); | |
1190 | } | |
1191 | ||
fe355b7f HY |
1192 | reipl_capabilities |= IPL_TYPE_NSS; |
1193 | return 0; | |
1194 | } | |
1195 | ||
ff6b8ea6 MH |
1196 | static int __init reipl_ccw_init(void) |
1197 | { | |
1198 | int rc; | |
1199 | ||
1200 | reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL); | |
1201 | if (!reipl_block_ccw) | |
1202 | return -ENOMEM; | |
a0443fbb HB |
1203 | |
1204 | if (MACHINE_IS_VM) { | |
1205 | if (!diag308_set_works) | |
1206 | sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO; | |
1207 | rc = sysfs_create_group(&reipl_kset->kobj, | |
1208 | &reipl_ccw_attr_group_vm); | |
1209 | } else { | |
1210 | if(!diag308_set_works) | |
1211 | sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO; | |
1212 | rc = sysfs_create_group(&reipl_kset->kobj, | |
1213 | &reipl_ccw_attr_group_lpar); | |
ff6b8ea6 | 1214 | } |
a0443fbb HB |
1215 | if (rc) |
1216 | return rc; | |
1217 | ||
1218 | reipl_block_ccw_init(reipl_block_ccw); | |
1219 | if (ipl_info.type == IPL_TYPE_CCW) { | |
18e22a17 | 1220 | reipl_block_ccw->ipl_info.ccw.ssid = ipl_ssid; |
ff6b8ea6 | 1221 | reipl_block_ccw->ipl_info.ccw.devno = ipl_devno; |
a0443fbb HB |
1222 | reipl_block_ccw_fill_parms(reipl_block_ccw); |
1223 | } | |
1224 | ||
ff6b8ea6 MH |
1225 | reipl_capabilities |= IPL_TYPE_CCW; |
1226 | return 0; | |
1227 | } | |
1228 | ||
1229 | static int __init reipl_fcp_init(void) | |
1230 | { | |
1231 | int rc; | |
1232 | ||
008d2d11 | 1233 | if (!diag308_set_works) { |
684d2fd4 | 1234 | if (ipl_info.type == IPL_TYPE_FCP) { |
008d2d11 | 1235 | make_attrs_ro(reipl_fcp_attrs); |
684d2fd4 HB |
1236 | sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO; |
1237 | } else | |
008d2d11 MH |
1238 | return 0; |
1239 | } | |
ff6b8ea6 MH |
1240 | |
1241 | reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL); | |
1242 | if (!reipl_block_fcp) | |
1243 | return -ENOMEM; | |
684d2fd4 HB |
1244 | |
1245 | /* sysfs: create fcp kset for mixing attr group and bin attrs */ | |
1246 | reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL, | |
1247 | &reipl_kset->kobj); | |
798620fb | 1248 | if (!reipl_fcp_kset) { |
684d2fd4 HB |
1249 | free_page((unsigned long) reipl_block_fcp); |
1250 | return -ENOMEM; | |
1251 | } | |
1252 | ||
1253 | rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group); | |
ff6b8ea6 | 1254 | if (rc) { |
684d2fd4 HB |
1255 | kset_unregister(reipl_fcp_kset); |
1256 | free_page((unsigned long) reipl_block_fcp); | |
ff6b8ea6 MH |
1257 | return rc; |
1258 | } | |
684d2fd4 | 1259 | |
69928601 | 1260 | if (ipl_info.type == IPL_TYPE_FCP) { |
ff6b8ea6 | 1261 | memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE); |
69928601 MH |
1262 | /* |
1263 | * Fix loadparm: There are systems where the (SCSI) LOADPARM | |
1264 | * is invalid in the SCSI IPL parameter block, so take it | |
1265 | * always from sclp_ipl_info. | |
1266 | */ | |
1267 | memcpy(reipl_block_fcp->hdr.loadparm, sclp_ipl_info.loadparm, | |
1268 | LOADPARM_LEN); | |
1269 | } else { | |
ff6b8ea6 MH |
1270 | reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN; |
1271 | reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION; | |
fbb04f38 | 1272 | reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN; |
ff6b8ea6 MH |
1273 | reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP; |
1274 | reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL; | |
1275 | } | |
1276 | reipl_capabilities |= IPL_TYPE_FCP; | |
1277 | return 0; | |
1278 | } | |
1279 | ||
4857d4bb MH |
1280 | static int __init reipl_type_init(void) |
1281 | { | |
1282 | enum ipl_type reipl_type = ipl_info.type; | |
1283 | struct ipl_parameter_block *reipl_block; | |
1284 | unsigned long size; | |
1285 | ||
1286 | reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size); | |
1287 | if (!reipl_block) | |
1288 | goto out; | |
1289 | /* | |
1290 | * If we have an OS info reipl block, this will be used | |
1291 | */ | |
1292 | if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_FCP) { | |
1293 | memcpy(reipl_block_fcp, reipl_block, size); | |
1294 | reipl_type = IPL_TYPE_FCP; | |
1295 | } else if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_CCW) { | |
1296 | memcpy(reipl_block_ccw, reipl_block, size); | |
1297 | reipl_type = IPL_TYPE_CCW; | |
1298 | } | |
1299 | out: | |
1300 | return reipl_set_type(reipl_type); | |
1301 | } | |
1302 | ||
2bc89b5e | 1303 | static int __init reipl_init(void) |
ff6b8ea6 MH |
1304 | { |
1305 | int rc; | |
1306 | ||
f62ed9e3 | 1307 | reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj); |
d91885be GKH |
1308 | if (!reipl_kset) |
1309 | return -ENOMEM; | |
1310 | rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr); | |
ff6b8ea6 | 1311 | if (rc) { |
d91885be | 1312 | kset_unregister(reipl_kset); |
ff6b8ea6 MH |
1313 | return rc; |
1314 | } | |
1315 | rc = reipl_ccw_init(); | |
1316 | if (rc) | |
1317 | return rc; | |
1318 | rc = reipl_fcp_init(); | |
fe355b7f HY |
1319 | if (rc) |
1320 | return rc; | |
1321 | rc = reipl_nss_init(); | |
ff6b8ea6 MH |
1322 | if (rc) |
1323 | return rc; | |
4857d4bb | 1324 | return reipl_type_init(); |
ff6b8ea6 MH |
1325 | } |
1326 | ||
2bc89b5e HC |
1327 | static struct shutdown_action __refdata reipl_action = { |
1328 | .name = SHUTDOWN_ACTION_REIPL_STR, | |
1329 | .fn = reipl_run, | |
1330 | .init = reipl_init, | |
1331 | }; | |
99ca4e58 MH |
1332 | |
1333 | /* | |
1334 | * dump shutdown action: Dump Linux on shutdown. | |
1335 | */ | |
1336 | ||
1337 | /* FCP dump device attributes */ | |
1338 | ||
eda4ddf7 | 1339 | DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n", |
99ca4e58 | 1340 | dump_block_fcp->ipl_info.fcp.wwpn); |
eda4ddf7 | 1341 | DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n", |
99ca4e58 MH |
1342 | dump_block_fcp->ipl_info.fcp.lun); |
1343 | DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n", | |
1344 | dump_block_fcp->ipl_info.fcp.bootprog); | |
1345 | DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n", | |
1346 | dump_block_fcp->ipl_info.fcp.br_lba); | |
1347 | DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n", | |
1348 | dump_block_fcp->ipl_info.fcp.devno); | |
1349 | ||
1350 | static struct attribute *dump_fcp_attrs[] = { | |
1351 | &sys_dump_fcp_device_attr.attr, | |
1352 | &sys_dump_fcp_wwpn_attr.attr, | |
1353 | &sys_dump_fcp_lun_attr.attr, | |
1354 | &sys_dump_fcp_bootprog_attr.attr, | |
1355 | &sys_dump_fcp_br_lba_attr.attr, | |
1356 | NULL, | |
1357 | }; | |
1358 | ||
1359 | static struct attribute_group dump_fcp_attr_group = { | |
1360 | .name = IPL_FCP_STR, | |
1361 | .attrs = dump_fcp_attrs, | |
1362 | }; | |
1363 | ||
1364 | /* CCW dump device attributes */ | |
18e22a17 | 1365 | DEFINE_IPL_CCW_ATTR_RW(dump_ccw, device, dump_block_ccw->ipl_info.ccw); |
99ca4e58 MH |
1366 | |
1367 | static struct attribute *dump_ccw_attrs[] = { | |
1368 | &sys_dump_ccw_device_attr.attr, | |
1369 | NULL, | |
1370 | }; | |
1371 | ||
1372 | static struct attribute_group dump_ccw_attr_group = { | |
1373 | .name = IPL_CCW_STR, | |
1374 | .attrs = dump_ccw_attrs, | |
1375 | }; | |
1376 | ||
1377 | /* dump type */ | |
1378 | ||
1379 | static int dump_set_type(enum dump_type type) | |
1380 | { | |
1381 | if (!(dump_capabilities & type)) | |
1382 | return -EINVAL; | |
1383 | switch (type) { | |
1384 | case DUMP_TYPE_CCW: | |
48657d22 MH |
1385 | if (diag308_set_works) |
1386 | dump_method = DUMP_METHOD_CCW_DIAG; | |
1387 | else if (MACHINE_IS_VM) | |
99ca4e58 MH |
1388 | dump_method = DUMP_METHOD_CCW_VM; |
1389 | else | |
1390 | dump_method = DUMP_METHOD_CCW_CIO; | |
1391 | break; | |
1392 | case DUMP_TYPE_FCP: | |
1393 | dump_method = DUMP_METHOD_FCP_DIAG; | |
1394 | break; | |
1395 | default: | |
1396 | dump_method = DUMP_METHOD_NONE; | |
1397 | } | |
1398 | dump_type = type; | |
1399 | return 0; | |
1400 | } | |
1401 | ||
1402 | static ssize_t dump_type_show(struct kobject *kobj, | |
1403 | struct kobj_attribute *attr, char *page) | |
1404 | { | |
1405 | return sprintf(page, "%s\n", dump_type_str(dump_type)); | |
1406 | } | |
1407 | ||
1408 | static ssize_t dump_type_store(struct kobject *kobj, | |
1409 | struct kobj_attribute *attr, | |
1410 | const char *buf, size_t len) | |
1411 | { | |
1412 | int rc = -EINVAL; | |
1413 | ||
1414 | if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0) | |
1415 | rc = dump_set_type(DUMP_TYPE_NONE); | |
1416 | else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0) | |
1417 | rc = dump_set_type(DUMP_TYPE_CCW); | |
1418 | else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0) | |
1419 | rc = dump_set_type(DUMP_TYPE_FCP); | |
1420 | return (rc != 0) ? rc : len; | |
1421 | } | |
1422 | ||
1423 | static struct kobj_attribute dump_type_attr = | |
1424 | __ATTR(dump_type, 0644, dump_type_show, dump_type_store); | |
1425 | ||
1426 | static struct kset *dump_kset; | |
1427 | ||
0894b3ae MH |
1428 | static void diag308_dump(void *dump_block) |
1429 | { | |
1430 | diag308(DIAG308_SET, dump_block); | |
1431 | while (1) { | |
0599eead | 1432 | if (diag308(DIAG308_LOAD_NORMAL_DUMP, NULL) != 0x302) |
0894b3ae MH |
1433 | break; |
1434 | udelay_simple(USEC_PER_SEC); | |
1435 | } | |
1436 | } | |
1437 | ||
2c2df118 | 1438 | static void __dump_run(void *unused) |
99ca4e58 MH |
1439 | { |
1440 | struct ccw_dev_id devid; | |
1441 | static char buf[100]; | |
1442 | ||
1443 | switch (dump_method) { | |
1444 | case DUMP_METHOD_CCW_CIO: | |
18e22a17 | 1445 | devid.ssid = dump_block_ccw->ipl_info.ccw.ssid; |
99ca4e58 | 1446 | devid.devno = dump_block_ccw->ipl_info.ccw.devno; |
99ca4e58 MH |
1447 | reipl_ccw_dev(&devid); |
1448 | break; | |
1449 | case DUMP_METHOD_CCW_VM: | |
99ca4e58 MH |
1450 | sprintf(buf, "STORE STATUS"); |
1451 | __cpcmd(buf, NULL, 0, NULL); | |
1452 | sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno); | |
1453 | __cpcmd(buf, NULL, 0, NULL); | |
1454 | break; | |
1455 | case DUMP_METHOD_CCW_DIAG: | |
0894b3ae | 1456 | diag308_dump(dump_block_ccw); |
99ca4e58 MH |
1457 | break; |
1458 | case DUMP_METHOD_FCP_DIAG: | |
0894b3ae | 1459 | diag308_dump(dump_block_fcp); |
99ca4e58 | 1460 | break; |
2c2df118 HC |
1461 | default: |
1462 | break; | |
99ca4e58 | 1463 | } |
2c2df118 HC |
1464 | } |
1465 | ||
1466 | static void dump_run(struct shutdown_trigger *trigger) | |
1467 | { | |
1468 | if (dump_method == DUMP_METHOD_NONE) | |
1469 | return; | |
1470 | smp_send_stop(); | |
8b646bd7 | 1471 | smp_call_ipl_cpu(__dump_run, NULL); |
99ca4e58 MH |
1472 | } |
1473 | ||
ff6b8ea6 MH |
1474 | static int __init dump_ccw_init(void) |
1475 | { | |
1476 | int rc; | |
1477 | ||
1478 | dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL); | |
1479 | if (!dump_block_ccw) | |
1480 | return -ENOMEM; | |
d91885be | 1481 | rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group); |
ff6b8ea6 MH |
1482 | if (rc) { |
1483 | free_page((unsigned long)dump_block_ccw); | |
1484 | return rc; | |
1485 | } | |
1486 | dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN; | |
1487 | dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION; | |
fbb04f38 | 1488 | dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN; |
ff6b8ea6 | 1489 | dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW; |
411ed322 | 1490 | dump_capabilities |= DUMP_TYPE_CCW; |
ff6b8ea6 MH |
1491 | return 0; |
1492 | } | |
1493 | ||
ff6b8ea6 MH |
1494 | static int __init dump_fcp_init(void) |
1495 | { | |
1496 | int rc; | |
1497 | ||
05dd2530 | 1498 | if (!sclp_ipl_info.has_dump) |
ff6b8ea6 MH |
1499 | return 0; /* LDIPL DUMP is not installed */ |
1500 | if (!diag308_set_works) | |
1501 | return 0; | |
1502 | dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL); | |
1503 | if (!dump_block_fcp) | |
1504 | return -ENOMEM; | |
d91885be | 1505 | rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group); |
ff6b8ea6 MH |
1506 | if (rc) { |
1507 | free_page((unsigned long)dump_block_fcp); | |
1508 | return rc; | |
1509 | } | |
1510 | dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN; | |
1511 | dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION; | |
fbb04f38 | 1512 | dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN; |
ff6b8ea6 MH |
1513 | dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP; |
1514 | dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP; | |
411ed322 | 1515 | dump_capabilities |= DUMP_TYPE_FCP; |
ff6b8ea6 MH |
1516 | return 0; |
1517 | } | |
1518 | ||
2bc89b5e | 1519 | static int __init dump_init(void) |
ff6b8ea6 MH |
1520 | { |
1521 | int rc; | |
1522 | ||
f62ed9e3 | 1523 | dump_kset = kset_create_and_add("dump", NULL, firmware_kobj); |
d91885be GKH |
1524 | if (!dump_kset) |
1525 | return -ENOMEM; | |
99ca4e58 | 1526 | rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr); |
ff6b8ea6 | 1527 | if (rc) { |
d91885be | 1528 | kset_unregister(dump_kset); |
ff6b8ea6 MH |
1529 | return rc; |
1530 | } | |
1531 | rc = dump_ccw_init(); | |
1532 | if (rc) | |
1533 | return rc; | |
1534 | rc = dump_fcp_init(); | |
1535 | if (rc) | |
1536 | return rc; | |
411ed322 | 1537 | dump_set_type(DUMP_TYPE_NONE); |
ff6b8ea6 MH |
1538 | return 0; |
1539 | } | |
1540 | ||
2bc89b5e HC |
1541 | static struct shutdown_action __refdata dump_action = { |
1542 | .name = SHUTDOWN_ACTION_DUMP_STR, | |
1543 | .fn = dump_run, | |
1544 | .init = dump_init, | |
1545 | }; | |
99ca4e58 | 1546 | |
099b7651 FM |
1547 | static void dump_reipl_run(struct shutdown_trigger *trigger) |
1548 | { | |
a7df7a94 | 1549 | unsigned long ipib = (unsigned long) reipl_block_actual; |
fbe76568 HC |
1550 | unsigned int csum; |
1551 | ||
90b3baa2 HC |
1552 | csum = (__force unsigned int) |
1553 | csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0); | |
fbe76568 HC |
1554 | mem_assign_absolute(S390_lowcore.ipib, ipib); |
1555 | mem_assign_absolute(S390_lowcore.ipib_checksum, csum); | |
099b7651 FM |
1556 | dump_run(trigger); |
1557 | } | |
1558 | ||
1559 | static int __init dump_reipl_init(void) | |
1560 | { | |
1561 | if (!diag308_set_works) | |
1562 | return -EOPNOTSUPP; | |
1563 | else | |
1564 | return 0; | |
1565 | } | |
1566 | ||
1567 | static struct shutdown_action __refdata dump_reipl_action = { | |
1568 | .name = SHUTDOWN_ACTION_DUMP_REIPL_STR, | |
1569 | .fn = dump_reipl_run, | |
1570 | .init = dump_reipl_init, | |
1571 | }; | |
1572 | ||
99ca4e58 MH |
1573 | /* |
1574 | * vmcmd shutdown action: Trigger vm command on shutdown. | |
1575 | */ | |
1576 | ||
1577 | static char vmcmd_on_reboot[128]; | |
1578 | static char vmcmd_on_panic[128]; | |
1579 | static char vmcmd_on_halt[128]; | |
1580 | static char vmcmd_on_poff[128]; | |
7dd6b334 | 1581 | static char vmcmd_on_restart[128]; |
99ca4e58 MH |
1582 | |
1583 | DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot); | |
1584 | DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic); | |
1585 | DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt); | |
1586 | DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff); | |
7dd6b334 | 1587 | DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart); |
99ca4e58 MH |
1588 | |
1589 | static struct attribute *vmcmd_attrs[] = { | |
1590 | &sys_vmcmd_on_reboot_attr.attr, | |
1591 | &sys_vmcmd_on_panic_attr.attr, | |
1592 | &sys_vmcmd_on_halt_attr.attr, | |
1593 | &sys_vmcmd_on_poff_attr.attr, | |
7dd6b334 | 1594 | &sys_vmcmd_on_restart_attr.attr, |
99ca4e58 MH |
1595 | NULL, |
1596 | }; | |
1597 | ||
1598 | static struct attribute_group vmcmd_attr_group = { | |
1599 | .attrs = vmcmd_attrs, | |
1600 | }; | |
1601 | ||
1602 | static struct kset *vmcmd_kset; | |
1603 | ||
1604 | static void vmcmd_run(struct shutdown_trigger *trigger) | |
ff6b8ea6 | 1605 | { |
8143adaf | 1606 | char *cmd; |
99ca4e58 MH |
1607 | |
1608 | if (strcmp(trigger->name, ON_REIPL_STR) == 0) | |
1609 | cmd = vmcmd_on_reboot; | |
1610 | else if (strcmp(trigger->name, ON_PANIC_STR) == 0) | |
1611 | cmd = vmcmd_on_panic; | |
1612 | else if (strcmp(trigger->name, ON_HALT_STR) == 0) | |
1613 | cmd = vmcmd_on_halt; | |
1614 | else if (strcmp(trigger->name, ON_POFF_STR) == 0) | |
1615 | cmd = vmcmd_on_poff; | |
7dd6b334 MH |
1616 | else if (strcmp(trigger->name, ON_RESTART_STR) == 0) |
1617 | cmd = vmcmd_on_restart; | |
99ca4e58 MH |
1618 | else |
1619 | return; | |
1620 | ||
1621 | if (strlen(cmd) == 0) | |
1622 | return; | |
8143adaf | 1623 | __cpcmd(cmd, NULL, 0, NULL); |
99ca4e58 MH |
1624 | } |
1625 | ||
1626 | static int vmcmd_init(void) | |
1627 | { | |
1628 | if (!MACHINE_IS_VM) | |
b8e660b8 | 1629 | return -EOPNOTSUPP; |
99ca4e58 MH |
1630 | vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj); |
1631 | if (!vmcmd_kset) | |
1632 | return -ENOMEM; | |
1633 | return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group); | |
1634 | } | |
1635 | ||
1636 | static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR, | |
1637 | vmcmd_run, vmcmd_init}; | |
1638 | ||
1639 | /* | |
1640 | * stop shutdown action: Stop Linux on shutdown. | |
1641 | */ | |
1642 | ||
1643 | static void stop_run(struct shutdown_trigger *trigger) | |
1644 | { | |
e1202eda MH |
1645 | if (strcmp(trigger->name, ON_PANIC_STR) == 0 || |
1646 | strcmp(trigger->name, ON_RESTART_STR) == 0) | |
c6547497 | 1647 | disabled_wait((unsigned long) __builtin_return_address(0)); |
8b646bd7 | 1648 | smp_stop_cpu(); |
99ca4e58 MH |
1649 | } |
1650 | ||
1651 | static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR, | |
1652 | stop_run, NULL}; | |
1653 | ||
1654 | /* action list */ | |
1655 | ||
1656 | static struct shutdown_action *shutdown_actions_list[] = { | |
099b7651 FM |
1657 | &ipl_action, &reipl_action, &dump_reipl_action, &dump_action, |
1658 | &vmcmd_action, &stop_action}; | |
99ca4e58 MH |
1659 | #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *)) |
1660 | ||
1661 | /* | |
1662 | * Trigger section | |
1663 | */ | |
1664 | ||
1665 | static struct kset *shutdown_actions_kset; | |
1666 | ||
1667 | static int set_trigger(const char *buf, struct shutdown_trigger *trigger, | |
1668 | size_t len) | |
1669 | { | |
1670 | int i; | |
099b7651 | 1671 | |
99ca4e58 | 1672 | for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) { |
099b7651 | 1673 | if (sysfs_streq(buf, shutdown_actions_list[i]->name)) { |
81088819 FM |
1674 | if (shutdown_actions_list[i]->init_rc) { |
1675 | return shutdown_actions_list[i]->init_rc; | |
1676 | } else { | |
1677 | trigger->action = shutdown_actions_list[i]; | |
1678 | return len; | |
1679 | } | |
99ca4e58 MH |
1680 | } |
1681 | } | |
1682 | return -EINVAL; | |
1683 | } | |
1684 | ||
1685 | /* on reipl */ | |
1686 | ||
1687 | static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR, | |
1688 | &reipl_action}; | |
1689 | ||
1690 | static ssize_t on_reboot_show(struct kobject *kobj, | |
1691 | struct kobj_attribute *attr, char *page) | |
1692 | { | |
1693 | return sprintf(page, "%s\n", on_reboot_trigger.action->name); | |
1694 | } | |
1695 | ||
1696 | static ssize_t on_reboot_store(struct kobject *kobj, | |
1697 | struct kobj_attribute *attr, | |
1698 | const char *buf, size_t len) | |
1699 | { | |
1700 | return set_trigger(buf, &on_reboot_trigger, len); | |
1701 | } | |
0f024379 | 1702 | static struct kobj_attribute on_reboot_attr = __ATTR_RW(on_reboot); |
99ca4e58 MH |
1703 | |
1704 | static void do_machine_restart(char *__unused) | |
1705 | { | |
1706 | smp_send_stop(); | |
1707 | on_reboot_trigger.action->fn(&on_reboot_trigger); | |
1708 | reipl_run(NULL); | |
1709 | } | |
1710 | void (*_machine_restart)(char *command) = do_machine_restart; | |
1711 | ||
1712 | /* on panic */ | |
1713 | ||
1714 | static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action}; | |
1715 | ||
1716 | static ssize_t on_panic_show(struct kobject *kobj, | |
1717 | struct kobj_attribute *attr, char *page) | |
1718 | { | |
1719 | return sprintf(page, "%s\n", on_panic_trigger.action->name); | |
1720 | } | |
1721 | ||
1722 | static ssize_t on_panic_store(struct kobject *kobj, | |
1723 | struct kobj_attribute *attr, | |
1724 | const char *buf, size_t len) | |
1725 | { | |
1726 | return set_trigger(buf, &on_panic_trigger, len); | |
1727 | } | |
0f024379 | 1728 | static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic); |
99ca4e58 MH |
1729 | |
1730 | static void do_panic(void) | |
1731 | { | |
3ab121ab | 1732 | lgr_info_log(); |
99ca4e58 MH |
1733 | on_panic_trigger.action->fn(&on_panic_trigger); |
1734 | stop_run(&on_panic_trigger); | |
1735 | } | |
1736 | ||
7dd6b334 MH |
1737 | /* on restart */ |
1738 | ||
1739 | static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR, | |
e1202eda | 1740 | &stop_action}; |
7dd6b334 MH |
1741 | |
1742 | static ssize_t on_restart_show(struct kobject *kobj, | |
1743 | struct kobj_attribute *attr, char *page) | |
1744 | { | |
1745 | return sprintf(page, "%s\n", on_restart_trigger.action->name); | |
1746 | } | |
1747 | ||
1748 | static ssize_t on_restart_store(struct kobject *kobj, | |
1749 | struct kobj_attribute *attr, | |
1750 | const char *buf, size_t len) | |
1751 | { | |
1752 | return set_trigger(buf, &on_restart_trigger, len); | |
1753 | } | |
0f024379 | 1754 | static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart); |
7dd6b334 | 1755 | |
8b646bd7 | 1756 | static void __do_restart(void *ignore) |
7dd6b334 | 1757 | { |
fa7c0043 | 1758 | __arch_local_irq_stosm(0x04); /* enable DAT */ |
7dd6b334 | 1759 | smp_send_stop(); |
60a0c68d MH |
1760 | #ifdef CONFIG_CRASH_DUMP |
1761 | crash_kexec(NULL); | |
1762 | #endif | |
7dd6b334 MH |
1763 | on_restart_trigger.action->fn(&on_restart_trigger); |
1764 | stop_run(&on_restart_trigger); | |
1765 | } | |
1766 | ||
8b646bd7 MS |
1767 | void do_restart(void) |
1768 | { | |
3ab121ab MH |
1769 | tracing_off(); |
1770 | debug_locks_off(); | |
1771 | lgr_info_log(); | |
8b646bd7 MS |
1772 | smp_call_online_cpu(__do_restart, NULL); |
1773 | } | |
1774 | ||
99ca4e58 MH |
1775 | /* on halt */ |
1776 | ||
1777 | static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action}; | |
1778 | ||
1779 | static ssize_t on_halt_show(struct kobject *kobj, | |
1780 | struct kobj_attribute *attr, char *page) | |
1781 | { | |
1782 | return sprintf(page, "%s\n", on_halt_trigger.action->name); | |
1783 | } | |
1784 | ||
1785 | static ssize_t on_halt_store(struct kobject *kobj, | |
1786 | struct kobj_attribute *attr, | |
1787 | const char *buf, size_t len) | |
1788 | { | |
1789 | return set_trigger(buf, &on_halt_trigger, len); | |
1790 | } | |
0f024379 | 1791 | static struct kobj_attribute on_halt_attr = __ATTR_RW(on_halt); |
99ca4e58 MH |
1792 | |
1793 | static void do_machine_halt(void) | |
1794 | { | |
1795 | smp_send_stop(); | |
1796 | on_halt_trigger.action->fn(&on_halt_trigger); | |
1797 | stop_run(&on_halt_trigger); | |
1798 | } | |
1799 | void (*_machine_halt)(void) = do_machine_halt; | |
1800 | ||
1801 | /* on power off */ | |
1802 | ||
1803 | static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action}; | |
1804 | ||
1805 | static ssize_t on_poff_show(struct kobject *kobj, | |
1806 | struct kobj_attribute *attr, char *page) | |
1807 | { | |
1808 | return sprintf(page, "%s\n", on_poff_trigger.action->name); | |
1809 | } | |
1810 | ||
1811 | static ssize_t on_poff_store(struct kobject *kobj, | |
1812 | struct kobj_attribute *attr, | |
1813 | const char *buf, size_t len) | |
1814 | { | |
1815 | return set_trigger(buf, &on_poff_trigger, len); | |
1816 | } | |
0f024379 | 1817 | static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff); |
99ca4e58 MH |
1818 | |
1819 | static void do_machine_power_off(void) | |
1820 | { | |
1821 | smp_send_stop(); | |
1822 | on_poff_trigger.action->fn(&on_poff_trigger); | |
1823 | stop_run(&on_poff_trigger); | |
1824 | } | |
1825 | void (*_machine_power_off)(void) = do_machine_power_off; | |
1826 | ||
0f024379 SO |
1827 | static struct attribute *shutdown_action_attrs[] = { |
1828 | &on_restart_attr.attr, | |
1829 | &on_reboot_attr.attr, | |
1830 | &on_panic_attr.attr, | |
1831 | &on_halt_attr.attr, | |
1832 | &on_poff_attr.attr, | |
1833 | NULL, | |
1834 | }; | |
1835 | ||
1836 | static struct attribute_group shutdown_action_attr_group = { | |
1837 | .attrs = shutdown_action_attrs, | |
1838 | }; | |
1839 | ||
99ca4e58 MH |
1840 | static void __init shutdown_triggers_init(void) |
1841 | { | |
d91885be | 1842 | shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL, |
f62ed9e3 | 1843 | firmware_kobj); |
d91885be | 1844 | if (!shutdown_actions_kset) |
99ca4e58 | 1845 | goto fail; |
0f024379 SO |
1846 | if (sysfs_create_group(&shutdown_actions_kset->kobj, |
1847 | &shutdown_action_attr_group)) | |
7dd6b334 | 1848 | goto fail; |
99ca4e58 MH |
1849 | return; |
1850 | fail: | |
1851 | panic("shutdown_triggers_init failed\n"); | |
1852 | } | |
1853 | ||
1854 | static void __init shutdown_actions_init(void) | |
1855 | { | |
1856 | int i; | |
1857 | ||
1858 | for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) { | |
1859 | if (!shutdown_actions_list[i]->init) | |
1860 | continue; | |
81088819 FM |
1861 | shutdown_actions_list[i]->init_rc = |
1862 | shutdown_actions_list[i]->init(); | |
ff6b8ea6 | 1863 | } |
ff6b8ea6 MH |
1864 | } |
1865 | ||
1866 | static int __init s390_ipl_init(void) | |
1867 | { | |
69928601 MH |
1868 | char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40}; |
1869 | ||
d5ab7a34 | 1870 | sclp_early_get_ipl_info(&sclp_ipl_info); |
69928601 MH |
1871 | /* |
1872 | * Fix loadparm: There are systems where the (SCSI) LOADPARM | |
1873 | * returned by read SCP info is invalid (contains EBCDIC blanks) | |
1874 | * when the system has been booted via diag308. In that case we use | |
1875 | * the value from diag308, if available. | |
1876 | * | |
1877 | * There are also systems where diag308 store does not work in | |
1878 | * case the system is booted from HMC. Fortunately in this case | |
1879 | * READ SCP info provides the correct value. | |
1880 | */ | |
1881 | if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 && | |
1882 | diag308_set_works) | |
1883 | memcpy(sclp_ipl_info.loadparm, ipl_block.hdr.loadparm, | |
1884 | LOADPARM_LEN); | |
99ca4e58 MH |
1885 | shutdown_actions_init(); |
1886 | shutdown_triggers_init(); | |
ff6b8ea6 MH |
1887 | return 0; |
1888 | } | |
1889 | ||
1890 | __initcall(s390_ipl_init); | |
15e9b586 | 1891 | |
99ca4e58 MH |
1892 | static void __init strncpy_skip_quote(char *dst, char *src, int n) |
1893 | { | |
1894 | int sx, dx; | |
1895 | ||
1896 | dx = 0; | |
1897 | for (sx = 0; src[sx] != 0; sx++) { | |
1898 | if (src[sx] == '"') | |
1899 | continue; | |
1900 | dst[dx++] = src[sx]; | |
1901 | if (dx >= n) | |
1902 | break; | |
1903 | } | |
1904 | } | |
1905 | ||
1906 | static int __init vmcmd_on_reboot_setup(char *str) | |
1907 | { | |
1908 | if (!MACHINE_IS_VM) | |
1909 | return 1; | |
1910 | strncpy_skip_quote(vmcmd_on_reboot, str, 127); | |
1911 | vmcmd_on_reboot[127] = 0; | |
1912 | on_reboot_trigger.action = &vmcmd_action; | |
1913 | return 1; | |
1914 | } | |
1915 | __setup("vmreboot=", vmcmd_on_reboot_setup); | |
1916 | ||
1917 | static int __init vmcmd_on_panic_setup(char *str) | |
1918 | { | |
1919 | if (!MACHINE_IS_VM) | |
1920 | return 1; | |
1921 | strncpy_skip_quote(vmcmd_on_panic, str, 127); | |
1922 | vmcmd_on_panic[127] = 0; | |
1923 | on_panic_trigger.action = &vmcmd_action; | |
1924 | return 1; | |
1925 | } | |
1926 | __setup("vmpanic=", vmcmd_on_panic_setup); | |
1927 | ||
1928 | static int __init vmcmd_on_halt_setup(char *str) | |
1929 | { | |
1930 | if (!MACHINE_IS_VM) | |
1931 | return 1; | |
1932 | strncpy_skip_quote(vmcmd_on_halt, str, 127); | |
1933 | vmcmd_on_halt[127] = 0; | |
1934 | on_halt_trigger.action = &vmcmd_action; | |
1935 | return 1; | |
1936 | } | |
1937 | __setup("vmhalt=", vmcmd_on_halt_setup); | |
1938 | ||
1939 | static int __init vmcmd_on_poff_setup(char *str) | |
1940 | { | |
1941 | if (!MACHINE_IS_VM) | |
1942 | return 1; | |
1943 | strncpy_skip_quote(vmcmd_on_poff, str, 127); | |
1944 | vmcmd_on_poff[127] = 0; | |
1945 | on_poff_trigger.action = &vmcmd_action; | |
1946 | return 1; | |
1947 | } | |
1948 | __setup("vmpoff=", vmcmd_on_poff_setup); | |
1949 | ||
1950 | static int on_panic_notify(struct notifier_block *self, | |
1951 | unsigned long event, void *data) | |
1952 | { | |
1953 | do_panic(); | |
1954 | return NOTIFY_OK; | |
1955 | } | |
1956 | ||
1957 | static struct notifier_block on_panic_nb = { | |
1958 | .notifier_call = on_panic_notify, | |
7e9b580e | 1959 | .priority = INT_MIN, |
99ca4e58 MH |
1960 | }; |
1961 | ||
1962 | void __init setup_ipl(void) | |
1963 | { | |
1964 | ipl_info.type = get_ipl_type(); | |
1965 | switch (ipl_info.type) { | |
1966 | case IPL_TYPE_CCW: | |
18e22a17 | 1967 | ipl_info.data.ccw.dev_id.ssid = ipl_ssid; |
99ca4e58 | 1968 | ipl_info.data.ccw.dev_id.devno = ipl_devno; |
99ca4e58 MH |
1969 | break; |
1970 | case IPL_TYPE_FCP: | |
1971 | case IPL_TYPE_FCP_DUMP: | |
18e22a17 | 1972 | ipl_info.data.fcp.dev_id.ssid = 0; |
99ca4e58 MH |
1973 | ipl_info.data.fcp.dev_id.devno = |
1974 | IPL_PARMBLOCK_START->ipl_info.fcp.devno; | |
99ca4e58 MH |
1975 | ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn; |
1976 | ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun; | |
1977 | break; | |
1978 | case IPL_TYPE_NSS: | |
1979 | strncpy(ipl_info.data.nss.name, kernel_nss_name, | |
1980 | sizeof(ipl_info.data.nss.name)); | |
1981 | break; | |
1982 | case IPL_TYPE_UNKNOWN: | |
99ca4e58 MH |
1983 | /* We have no info to copy */ |
1984 | break; | |
1985 | } | |
1986 | atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb); | |
1987 | } | |
1988 | ||
a0443fbb HB |
1989 | void __init ipl_update_parameters(void) |
1990 | { | |
3a95e8eb MH |
1991 | int rc; |
1992 | ||
1993 | rc = diag308(DIAG308_STORE, &ipl_block); | |
1994 | if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG)) | |
a0443fbb HB |
1995 | diag308_set_works = 1; |
1996 | } | |
1997 | ||
d543a106 | 1998 | void __init ipl_verify_parameters(void) |
6fc321fd HC |
1999 | { |
2000 | struct cio_iplinfo iplinfo; | |
6fc321fd HC |
2001 | |
2002 | if (cio_get_iplinfo(&iplinfo)) | |
2003 | return; | |
2004 | ||
18e22a17 | 2005 | ipl_ssid = iplinfo.ssid; |
6fc321fd HC |
2006 | ipl_devno = iplinfo.devno; |
2007 | ipl_flags |= IPL_DEVNO_VALID; | |
2008 | if (!iplinfo.is_qdio) | |
2009 | return; | |
2010 | ipl_flags |= IPL_PARMBLOCK_VALID; | |
6fc321fd HC |
2011 | } |
2012 | ||
15e9b586 HC |
2013 | static LIST_HEAD(rcall); |
2014 | static DEFINE_MUTEX(rcall_mutex); | |
2015 | ||
2016 | void register_reset_call(struct reset_call *reset) | |
2017 | { | |
2018 | mutex_lock(&rcall_mutex); | |
2019 | list_add(&reset->list, &rcall); | |
2020 | mutex_unlock(&rcall_mutex); | |
2021 | } | |
2022 | EXPORT_SYMBOL_GPL(register_reset_call); | |
2023 | ||
2024 | void unregister_reset_call(struct reset_call *reset) | |
2025 | { | |
2026 | mutex_lock(&rcall_mutex); | |
2027 | list_del(&reset->list); | |
2028 | mutex_unlock(&rcall_mutex); | |
2029 | } | |
2030 | EXPORT_SYMBOL_GPL(unregister_reset_call); | |
2031 | ||
2032 | static void do_reset_calls(void) | |
2033 | { | |
2034 | struct reset_call *reset; | |
2035 | ||
9dc7356e MH |
2036 | if (diag308_set_works) { |
2037 | diag308_reset(); | |
2038 | return; | |
2039 | } | |
15e9b586 HC |
2040 | list_for_each_entry(reset, &rcall, list) |
2041 | reset->fn(); | |
2042 | } | |
2043 | ||
1a36a39e | 2044 | void s390_reset_system(void) |
15e9b586 | 2045 | { |
c667aeac | 2046 | struct lowcore *lc; |
15e9b586 | 2047 | |
c667aeac | 2048 | lc = (struct lowcore *)(unsigned long) store_prefix(); |
a45e1414 MH |
2049 | |
2050 | /* Stack for interrupt/machine check handler */ | |
15e9b586 HC |
2051 | lc->panic_stack = S390_lowcore.panic_stack; |
2052 | ||
2053 | /* Disable prefixing */ | |
2054 | set_prefix(0); | |
2055 | ||
2056 | /* Disable lowcore protection */ | |
2057 | __ctl_clear_bit(0,28); | |
2058 | ||
2059 | /* Set new machine check handler */ | |
e258d719 | 2060 | S390_lowcore.mcck_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT; |
15e9b586 | 2061 | S390_lowcore.mcck_new_psw.addr = |
fecc868a | 2062 | (unsigned long) s390_base_mcck_handler; |
a45e1414 MH |
2063 | |
2064 | /* Set new program check handler */ | |
e258d719 | 2065 | S390_lowcore.program_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT; |
a45e1414 | 2066 | S390_lowcore.program_new_psw.addr = |
fecc868a | 2067 | (unsigned long) s390_base_pgm_handler; |
a45e1414 | 2068 | |
15e9b586 HC |
2069 | do_reset_calls(); |
2070 | } |