Commit | Line | Data |
---|---|---|
cff7e81b JF |
1 | /* |
2 | * copyright (c) 2006 IBM Corporation | |
3 | * Authored by: Mike D. Day <ncmike@us.ibm.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License version 2 as | |
7 | * published by the Free Software Foundation. | |
8 | */ | |
9 | ||
5a0e3ad6 | 10 | #include <linux/slab.h> |
cff7e81b | 11 | #include <linux/kernel.h> |
46894f17 | 12 | #include <linux/init.h> |
cff7e81b | 13 | #include <linux/kobject.h> |
609b0b8c | 14 | #include <linux/err.h> |
cff7e81b JF |
15 | |
16 | #include <asm/xen/hypervisor.h> | |
17 | #include <asm/xen/hypercall.h> | |
18 | ||
1ccbf534 | 19 | #include <xen/xen.h> |
cff7e81b JF |
20 | #include <xen/xenbus.h> |
21 | #include <xen/interface/xen.h> | |
22 | #include <xen/interface/version.h> | |
5f141548 BO |
23 | #ifdef CONFIG_XEN_HAVE_VPMU |
24 | #include <xen/interface/xenpmu.h> | |
25 | #endif | |
cff7e81b JF |
26 | |
27 | #define HYPERVISOR_ATTR_RO(_name) \ | |
28 | static struct hyp_sysfs_attr _name##_attr = __ATTR_RO(_name) | |
29 | ||
30 | #define HYPERVISOR_ATTR_RW(_name) \ | |
31 | static struct hyp_sysfs_attr _name##_attr = \ | |
32 | __ATTR(_name, 0644, _name##_show, _name##_store) | |
33 | ||
34 | struct hyp_sysfs_attr { | |
35 | struct attribute attr; | |
36 | ssize_t (*show)(struct hyp_sysfs_attr *, char *); | |
37 | ssize_t (*store)(struct hyp_sysfs_attr *, const char *, size_t); | |
38 | void *hyp_attr_data; | |
39 | }; | |
40 | ||
41 | static ssize_t type_show(struct hyp_sysfs_attr *attr, char *buffer) | |
42 | { | |
43 | return sprintf(buffer, "xen\n"); | |
44 | } | |
45 | ||
46 | HYPERVISOR_ATTR_RO(type); | |
47 | ||
48 | static int __init xen_sysfs_type_init(void) | |
49 | { | |
50 | return sysfs_create_file(hypervisor_kobj, &type_attr.attr); | |
51 | } | |
52 | ||
4a4c29c9 JG |
53 | static ssize_t guest_type_show(struct hyp_sysfs_attr *attr, char *buffer) |
54 | { | |
55 | const char *type; | |
56 | ||
57 | switch (xen_domain_type) { | |
58 | case XEN_NATIVE: | |
59 | /* ARM only. */ | |
60 | type = "Xen"; | |
61 | break; | |
62 | case XEN_PV_DOMAIN: | |
63 | type = "PV"; | |
64 | break; | |
65 | case XEN_HVM_DOMAIN: | |
66 | type = xen_pvh_domain() ? "PVH" : "HVM"; | |
67 | break; | |
68 | default: | |
69 | return -EINVAL; | |
70 | } | |
71 | ||
72 | return sprintf(buffer, "%s\n", type); | |
73 | } | |
74 | ||
75 | HYPERVISOR_ATTR_RO(guest_type); | |
76 | ||
77 | static int __init xen_sysfs_guest_type_init(void) | |
78 | { | |
79 | return sysfs_create_file(hypervisor_kobj, &guest_type_attr.attr); | |
80 | } | |
81 | ||
cff7e81b JF |
82 | /* xen version attributes */ |
83 | static ssize_t major_show(struct hyp_sysfs_attr *attr, char *buffer) | |
84 | { | |
85 | int version = HYPERVISOR_xen_version(XENVER_version, NULL); | |
86 | if (version) | |
87 | return sprintf(buffer, "%d\n", version >> 16); | |
88 | return -ENODEV; | |
89 | } | |
90 | ||
91 | HYPERVISOR_ATTR_RO(major); | |
92 | ||
93 | static ssize_t minor_show(struct hyp_sysfs_attr *attr, char *buffer) | |
94 | { | |
95 | int version = HYPERVISOR_xen_version(XENVER_version, NULL); | |
96 | if (version) | |
97 | return sprintf(buffer, "%d\n", version & 0xff); | |
98 | return -ENODEV; | |
99 | } | |
100 | ||
101 | HYPERVISOR_ATTR_RO(minor); | |
102 | ||
103 | static ssize_t extra_show(struct hyp_sysfs_attr *attr, char *buffer) | |
104 | { | |
105 | int ret = -ENOMEM; | |
106 | char *extra; | |
107 | ||
108 | extra = kmalloc(XEN_EXTRAVERSION_LEN, GFP_KERNEL); | |
109 | if (extra) { | |
110 | ret = HYPERVISOR_xen_version(XENVER_extraversion, extra); | |
111 | if (!ret) | |
112 | ret = sprintf(buffer, "%s\n", extra); | |
113 | kfree(extra); | |
114 | } | |
115 | ||
116 | return ret; | |
117 | } | |
118 | ||
119 | HYPERVISOR_ATTR_RO(extra); | |
120 | ||
121 | static struct attribute *version_attrs[] = { | |
122 | &major_attr.attr, | |
123 | &minor_attr.attr, | |
124 | &extra_attr.attr, | |
125 | NULL | |
126 | }; | |
127 | ||
ead1d014 | 128 | static const struct attribute_group version_group = { |
cff7e81b JF |
129 | .name = "version", |
130 | .attrs = version_attrs, | |
131 | }; | |
132 | ||
133 | static int __init xen_sysfs_version_init(void) | |
134 | { | |
135 | return sysfs_create_group(hypervisor_kobj, &version_group); | |
136 | } | |
137 | ||
cff7e81b JF |
138 | /* UUID */ |
139 | ||
5c13f806 | 140 | static ssize_t uuid_show_fallback(struct hyp_sysfs_attr *attr, char *buffer) |
cff7e81b JF |
141 | { |
142 | char *vm, *val; | |
143 | int ret; | |
144 | extern int xenstored_ready; | |
145 | ||
146 | if (!xenstored_ready) | |
147 | return -EBUSY; | |
148 | ||
149 | vm = xenbus_read(XBT_NIL, "vm", "", NULL); | |
150 | if (IS_ERR(vm)) | |
151 | return PTR_ERR(vm); | |
152 | val = xenbus_read(XBT_NIL, vm, "uuid", NULL); | |
153 | kfree(vm); | |
154 | if (IS_ERR(val)) | |
155 | return PTR_ERR(val); | |
156 | ret = sprintf(buffer, "%s\n", val); | |
157 | kfree(val); | |
158 | return ret; | |
159 | } | |
160 | ||
5c13f806 DDG |
161 | static ssize_t uuid_show(struct hyp_sysfs_attr *attr, char *buffer) |
162 | { | |
163 | xen_domain_handle_t uuid; | |
164 | int ret; | |
165 | ret = HYPERVISOR_xen_version(XENVER_guest_handle, uuid); | |
166 | if (ret) | |
167 | return uuid_show_fallback(attr, buffer); | |
168 | ret = sprintf(buffer, "%pU\n", uuid); | |
169 | return ret; | |
170 | } | |
171 | ||
cff7e81b JF |
172 | HYPERVISOR_ATTR_RO(uuid); |
173 | ||
174 | static int __init xen_sysfs_uuid_init(void) | |
175 | { | |
176 | return sysfs_create_file(hypervisor_kobj, &uuid_attr.attr); | |
177 | } | |
178 | ||
cff7e81b JF |
179 | /* xen compilation attributes */ |
180 | ||
181 | static ssize_t compiler_show(struct hyp_sysfs_attr *attr, char *buffer) | |
182 | { | |
183 | int ret = -ENOMEM; | |
184 | struct xen_compile_info *info; | |
185 | ||
186 | info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL); | |
187 | if (info) { | |
188 | ret = HYPERVISOR_xen_version(XENVER_compile_info, info); | |
189 | if (!ret) | |
190 | ret = sprintf(buffer, "%s\n", info->compiler); | |
191 | kfree(info); | |
192 | } | |
193 | ||
194 | return ret; | |
195 | } | |
196 | ||
197 | HYPERVISOR_ATTR_RO(compiler); | |
198 | ||
199 | static ssize_t compiled_by_show(struct hyp_sysfs_attr *attr, char *buffer) | |
200 | { | |
201 | int ret = -ENOMEM; | |
202 | struct xen_compile_info *info; | |
203 | ||
204 | info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL); | |
205 | if (info) { | |
206 | ret = HYPERVISOR_xen_version(XENVER_compile_info, info); | |
207 | if (!ret) | |
208 | ret = sprintf(buffer, "%s\n", info->compile_by); | |
209 | kfree(info); | |
210 | } | |
211 | ||
212 | return ret; | |
213 | } | |
214 | ||
215 | HYPERVISOR_ATTR_RO(compiled_by); | |
216 | ||
217 | static ssize_t compile_date_show(struct hyp_sysfs_attr *attr, char *buffer) | |
218 | { | |
219 | int ret = -ENOMEM; | |
220 | struct xen_compile_info *info; | |
221 | ||
222 | info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL); | |
223 | if (info) { | |
224 | ret = HYPERVISOR_xen_version(XENVER_compile_info, info); | |
225 | if (!ret) | |
226 | ret = sprintf(buffer, "%s\n", info->compile_date); | |
227 | kfree(info); | |
228 | } | |
229 | ||
230 | return ret; | |
231 | } | |
232 | ||
233 | HYPERVISOR_ATTR_RO(compile_date); | |
234 | ||
235 | static struct attribute *xen_compile_attrs[] = { | |
236 | &compiler_attr.attr, | |
237 | &compiled_by_attr.attr, | |
238 | &compile_date_attr.attr, | |
239 | NULL | |
240 | }; | |
241 | ||
ead1d014 | 242 | static const struct attribute_group xen_compilation_group = { |
cff7e81b JF |
243 | .name = "compilation", |
244 | .attrs = xen_compile_attrs, | |
245 | }; | |
246 | ||
5b00b504 | 247 | static int __init xen_sysfs_compilation_init(void) |
cff7e81b JF |
248 | { |
249 | return sysfs_create_group(hypervisor_kobj, &xen_compilation_group); | |
250 | } | |
251 | ||
cff7e81b JF |
252 | /* xen properties info */ |
253 | ||
254 | static ssize_t capabilities_show(struct hyp_sysfs_attr *attr, char *buffer) | |
255 | { | |
256 | int ret = -ENOMEM; | |
257 | char *caps; | |
258 | ||
259 | caps = kmalloc(XEN_CAPABILITIES_INFO_LEN, GFP_KERNEL); | |
260 | if (caps) { | |
261 | ret = HYPERVISOR_xen_version(XENVER_capabilities, caps); | |
262 | if (!ret) | |
263 | ret = sprintf(buffer, "%s\n", caps); | |
264 | kfree(caps); | |
265 | } | |
266 | ||
267 | return ret; | |
268 | } | |
269 | ||
270 | HYPERVISOR_ATTR_RO(capabilities); | |
271 | ||
272 | static ssize_t changeset_show(struct hyp_sysfs_attr *attr, char *buffer) | |
273 | { | |
274 | int ret = -ENOMEM; | |
275 | char *cset; | |
276 | ||
277 | cset = kmalloc(XEN_CHANGESET_INFO_LEN, GFP_KERNEL); | |
278 | if (cset) { | |
279 | ret = HYPERVISOR_xen_version(XENVER_changeset, cset); | |
280 | if (!ret) | |
281 | ret = sprintf(buffer, "%s\n", cset); | |
282 | kfree(cset); | |
283 | } | |
284 | ||
285 | return ret; | |
286 | } | |
287 | ||
288 | HYPERVISOR_ATTR_RO(changeset); | |
289 | ||
290 | static ssize_t virtual_start_show(struct hyp_sysfs_attr *attr, char *buffer) | |
291 | { | |
292 | int ret = -ENOMEM; | |
293 | struct xen_platform_parameters *parms; | |
294 | ||
295 | parms = kmalloc(sizeof(struct xen_platform_parameters), GFP_KERNEL); | |
296 | if (parms) { | |
297 | ret = HYPERVISOR_xen_version(XENVER_platform_parameters, | |
298 | parms); | |
299 | if (!ret) | |
37ea0fcb IC |
300 | ret = sprintf(buffer, "%"PRI_xen_ulong"\n", |
301 | parms->virt_start); | |
cff7e81b JF |
302 | kfree(parms); |
303 | } | |
304 | ||
305 | return ret; | |
306 | } | |
307 | ||
308 | HYPERVISOR_ATTR_RO(virtual_start); | |
309 | ||
310 | static ssize_t pagesize_show(struct hyp_sysfs_attr *attr, char *buffer) | |
311 | { | |
312 | int ret; | |
313 | ||
314 | ret = HYPERVISOR_xen_version(XENVER_pagesize, NULL); | |
315 | if (ret > 0) | |
316 | ret = sprintf(buffer, "%x\n", ret); | |
317 | ||
318 | return ret; | |
319 | } | |
320 | ||
321 | HYPERVISOR_ATTR_RO(pagesize); | |
322 | ||
cff7e81b JF |
323 | static ssize_t xen_feature_show(int index, char *buffer) |
324 | { | |
a649b720 JF |
325 | ssize_t ret; |
326 | struct xen_feature_info info; | |
cff7e81b | 327 | |
a649b720 JF |
328 | info.submap_idx = index; |
329 | ret = HYPERVISOR_xen_version(XENVER_get_features, &info); | |
330 | if (!ret) | |
331 | ret = sprintf(buffer, "%08x", info.submap); | |
cff7e81b JF |
332 | |
333 | return ret; | |
334 | } | |
335 | ||
a649b720 | 336 | static ssize_t features_show(struct hyp_sysfs_attr *attr, char *buffer) |
cff7e81b | 337 | { |
a649b720 JF |
338 | ssize_t len; |
339 | int i; | |
340 | ||
341 | len = 0; | |
342 | for (i = XENFEAT_NR_SUBMAPS-1; i >= 0; i--) { | |
343 | int ret = xen_feature_show(i, buffer + len); | |
344 | if (ret < 0) { | |
345 | if (len == 0) | |
346 | len = ret; | |
347 | break; | |
348 | } | |
349 | len += ret; | |
350 | } | |
351 | if (len > 0) | |
352 | buffer[len++] = '\n'; | |
353 | ||
354 | return len; | |
cff7e81b JF |
355 | } |
356 | ||
a649b720 | 357 | HYPERVISOR_ATTR_RO(features); |
cff7e81b | 358 | |
84b76257 JG |
359 | static ssize_t buildid_show(struct hyp_sysfs_attr *attr, char *buffer) |
360 | { | |
361 | ssize_t ret; | |
362 | struct xen_build_id *buildid; | |
363 | ||
364 | ret = HYPERVISOR_xen_version(XENVER_build_id, NULL); | |
365 | if (ret < 0) { | |
366 | if (ret == -EPERM) | |
367 | ret = sprintf(buffer, "<denied>"); | |
368 | return ret; | |
369 | } | |
370 | ||
371 | buildid = kmalloc(sizeof(*buildid) + ret, GFP_KERNEL); | |
372 | if (!buildid) | |
373 | return -ENOMEM; | |
374 | ||
375 | buildid->len = ret; | |
376 | ret = HYPERVISOR_xen_version(XENVER_build_id, buildid); | |
377 | if (ret > 0) | |
378 | ret = sprintf(buffer, "%s", buildid->buf); | |
379 | kfree(buildid); | |
380 | ||
381 | return ret; | |
382 | } | |
383 | ||
384 | HYPERVISOR_ATTR_RO(buildid); | |
385 | ||
cff7e81b JF |
386 | static struct attribute *xen_properties_attrs[] = { |
387 | &capabilities_attr.attr, | |
388 | &changeset_attr.attr, | |
389 | &virtual_start_attr.attr, | |
390 | &pagesize_attr.attr, | |
a649b720 | 391 | &features_attr.attr, |
84b76257 | 392 | &buildid_attr.attr, |
cff7e81b JF |
393 | NULL |
394 | }; | |
395 | ||
ead1d014 | 396 | static const struct attribute_group xen_properties_group = { |
cff7e81b JF |
397 | .name = "properties", |
398 | .attrs = xen_properties_attrs, | |
399 | }; | |
400 | ||
5b00b504 | 401 | static int __init xen_sysfs_properties_init(void) |
cff7e81b JF |
402 | { |
403 | return sysfs_create_group(hypervisor_kobj, &xen_properties_group); | |
404 | } | |
405 | ||
5f141548 BO |
406 | #ifdef CONFIG_XEN_HAVE_VPMU |
407 | struct pmu_mode { | |
408 | const char *name; | |
409 | uint32_t mode; | |
410 | }; | |
411 | ||
412 | static struct pmu_mode pmu_modes[] = { | |
413 | {"off", XENPMU_MODE_OFF}, | |
414 | {"self", XENPMU_MODE_SELF}, | |
415 | {"hv", XENPMU_MODE_HV}, | |
416 | {"all", XENPMU_MODE_ALL} | |
417 | }; | |
418 | ||
419 | static ssize_t pmu_mode_store(struct hyp_sysfs_attr *attr, | |
420 | const char *buffer, size_t len) | |
421 | { | |
422 | int ret; | |
423 | struct xen_pmu_params xp; | |
424 | int i; | |
425 | ||
426 | for (i = 0; i < ARRAY_SIZE(pmu_modes); i++) { | |
427 | if (strncmp(buffer, pmu_modes[i].name, len - 1) == 0) { | |
428 | xp.val = pmu_modes[i].mode; | |
429 | break; | |
430 | } | |
431 | } | |
432 | ||
433 | if (i == ARRAY_SIZE(pmu_modes)) | |
434 | return -EINVAL; | |
435 | ||
436 | xp.version.maj = XENPMU_VER_MAJ; | |
437 | xp.version.min = XENPMU_VER_MIN; | |
438 | ret = HYPERVISOR_xenpmu_op(XENPMU_mode_set, &xp); | |
439 | if (ret) | |
440 | return ret; | |
441 | ||
442 | return len; | |
443 | } | |
444 | ||
445 | static ssize_t pmu_mode_show(struct hyp_sysfs_attr *attr, char *buffer) | |
446 | { | |
447 | int ret; | |
448 | struct xen_pmu_params xp; | |
449 | int i; | |
450 | uint32_t mode; | |
451 | ||
452 | xp.version.maj = XENPMU_VER_MAJ; | |
453 | xp.version.min = XENPMU_VER_MIN; | |
454 | ret = HYPERVISOR_xenpmu_op(XENPMU_mode_get, &xp); | |
455 | if (ret) | |
456 | return ret; | |
457 | ||
458 | mode = (uint32_t)xp.val; | |
459 | for (i = 0; i < ARRAY_SIZE(pmu_modes); i++) { | |
460 | if (mode == pmu_modes[i].mode) | |
461 | return sprintf(buffer, "%s\n", pmu_modes[i].name); | |
462 | } | |
463 | ||
464 | return -EINVAL; | |
465 | } | |
466 | HYPERVISOR_ATTR_RW(pmu_mode); | |
467 | ||
468 | static ssize_t pmu_features_store(struct hyp_sysfs_attr *attr, | |
469 | const char *buffer, size_t len) | |
470 | { | |
471 | int ret; | |
472 | uint32_t features; | |
473 | struct xen_pmu_params xp; | |
474 | ||
475 | ret = kstrtou32(buffer, 0, &features); | |
476 | if (ret) | |
477 | return ret; | |
478 | ||
479 | xp.val = features; | |
480 | xp.version.maj = XENPMU_VER_MAJ; | |
481 | xp.version.min = XENPMU_VER_MIN; | |
482 | ret = HYPERVISOR_xenpmu_op(XENPMU_feature_set, &xp); | |
483 | if (ret) | |
484 | return ret; | |
485 | ||
486 | return len; | |
487 | } | |
488 | ||
489 | static ssize_t pmu_features_show(struct hyp_sysfs_attr *attr, char *buffer) | |
490 | { | |
491 | int ret; | |
492 | struct xen_pmu_params xp; | |
493 | ||
494 | xp.version.maj = XENPMU_VER_MAJ; | |
495 | xp.version.min = XENPMU_VER_MIN; | |
496 | ret = HYPERVISOR_xenpmu_op(XENPMU_feature_get, &xp); | |
497 | if (ret) | |
498 | return ret; | |
499 | ||
500 | return sprintf(buffer, "0x%x\n", (uint32_t)xp.val); | |
501 | } | |
502 | HYPERVISOR_ATTR_RW(pmu_features); | |
503 | ||
504 | static struct attribute *xen_pmu_attrs[] = { | |
505 | &pmu_mode_attr.attr, | |
506 | &pmu_features_attr.attr, | |
507 | NULL | |
508 | }; | |
509 | ||
510 | static const struct attribute_group xen_pmu_group = { | |
511 | .name = "pmu", | |
512 | .attrs = xen_pmu_attrs, | |
513 | }; | |
514 | ||
5b00b504 | 515 | static int __init xen_sysfs_pmu_init(void) |
5f141548 BO |
516 | { |
517 | return sysfs_create_group(hypervisor_kobj, &xen_pmu_group); | |
518 | } | |
5f141548 BO |
519 | #endif |
520 | ||
cff7e81b JF |
521 | static int __init hyper_sysfs_init(void) |
522 | { | |
523 | int ret; | |
524 | ||
525 | if (!xen_domain()) | |
526 | return -ENODEV; | |
527 | ||
528 | ret = xen_sysfs_type_init(); | |
529 | if (ret) | |
530 | goto out; | |
4a4c29c9 JG |
531 | ret = xen_sysfs_guest_type_init(); |
532 | if (ret) | |
533 | goto guest_type_out; | |
cff7e81b JF |
534 | ret = xen_sysfs_version_init(); |
535 | if (ret) | |
536 | goto version_out; | |
5b00b504 | 537 | ret = xen_sysfs_compilation_init(); |
cff7e81b JF |
538 | if (ret) |
539 | goto comp_out; | |
540 | ret = xen_sysfs_uuid_init(); | |
541 | if (ret) | |
542 | goto uuid_out; | |
5b00b504 | 543 | ret = xen_sysfs_properties_init(); |
cff7e81b JF |
544 | if (ret) |
545 | goto prop_out; | |
5f141548 BO |
546 | #ifdef CONFIG_XEN_HAVE_VPMU |
547 | if (xen_initial_domain()) { | |
5b00b504 | 548 | ret = xen_sysfs_pmu_init(); |
5f141548 | 549 | if (ret) { |
46894f17 PG |
550 | sysfs_remove_group(hypervisor_kobj, |
551 | &xen_properties_group); | |
5f141548 BO |
552 | goto prop_out; |
553 | } | |
554 | } | |
555 | #endif | |
cff7e81b JF |
556 | goto out; |
557 | ||
cff7e81b | 558 | prop_out: |
46894f17 | 559 | sysfs_remove_file(hypervisor_kobj, &uuid_attr.attr); |
cff7e81b | 560 | uuid_out: |
46894f17 | 561 | sysfs_remove_group(hypervisor_kobj, &xen_compilation_group); |
cff7e81b | 562 | comp_out: |
46894f17 | 563 | sysfs_remove_group(hypervisor_kobj, &version_group); |
cff7e81b | 564 | version_out: |
4a4c29c9 JG |
565 | sysfs_remove_file(hypervisor_kobj, &guest_type_attr.attr); |
566 | guest_type_out: | |
46894f17 | 567 | sysfs_remove_file(hypervisor_kobj, &type_attr.attr); |
cff7e81b JF |
568 | out: |
569 | return ret; | |
570 | } | |
46894f17 | 571 | device_initcall(hyper_sysfs_init); |
cff7e81b JF |
572 | |
573 | static ssize_t hyp_sysfs_show(struct kobject *kobj, | |
574 | struct attribute *attr, | |
575 | char *buffer) | |
576 | { | |
577 | struct hyp_sysfs_attr *hyp_attr; | |
578 | hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr); | |
579 | if (hyp_attr->show) | |
580 | return hyp_attr->show(hyp_attr, buffer); | |
581 | return 0; | |
582 | } | |
583 | ||
584 | static ssize_t hyp_sysfs_store(struct kobject *kobj, | |
585 | struct attribute *attr, | |
586 | const char *buffer, | |
587 | size_t len) | |
588 | { | |
589 | struct hyp_sysfs_attr *hyp_attr; | |
590 | hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr); | |
591 | if (hyp_attr->store) | |
592 | return hyp_attr->store(hyp_attr, buffer, len); | |
593 | return 0; | |
594 | } | |
595 | ||
52cf25d0 | 596 | static const struct sysfs_ops hyp_sysfs_ops = { |
cff7e81b JF |
597 | .show = hyp_sysfs_show, |
598 | .store = hyp_sysfs_store, | |
599 | }; | |
600 | ||
601 | static struct kobj_type hyp_sysfs_kobj_type = { | |
602 | .sysfs_ops = &hyp_sysfs_ops, | |
603 | }; | |
604 | ||
605 | static int __init hypervisor_subsys_init(void) | |
606 | { | |
607 | if (!xen_domain()) | |
608 | return -ENODEV; | |
609 | ||
610 | hypervisor_kobj->ktype = &hyp_sysfs_kobj_type; | |
611 | return 0; | |
612 | } | |
613 | device_initcall(hypervisor_subsys_init); |