Commit | Line | Data |
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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
cff7e81b JF |
2 | /* |
3 | * copyright (c) 2006 IBM Corporation | |
4 | * Authored by: Mike D. Day <ncmike@us.ibm.com> | |
cff7e81b JF |
5 | */ |
6 | ||
5a0e3ad6 | 7 | #include <linux/slab.h> |
cff7e81b | 8 | #include <linux/kernel.h> |
46894f17 | 9 | #include <linux/init.h> |
cff7e81b | 10 | #include <linux/kobject.h> |
609b0b8c | 11 | #include <linux/err.h> |
cff7e81b JF |
12 | |
13 | #include <asm/xen/hypervisor.h> | |
14 | #include <asm/xen/hypercall.h> | |
15 | ||
1ccbf534 | 16 | #include <xen/xen.h> |
cff7e81b JF |
17 | #include <xen/xenbus.h> |
18 | #include <xen/interface/xen.h> | |
19 | #include <xen/interface/version.h> | |
5f141548 BO |
20 | #ifdef CONFIG_XEN_HAVE_VPMU |
21 | #include <xen/interface/xenpmu.h> | |
22 | #endif | |
cff7e81b JF |
23 | |
24 | #define HYPERVISOR_ATTR_RO(_name) \ | |
25 | static struct hyp_sysfs_attr _name##_attr = __ATTR_RO(_name) | |
26 | ||
27 | #define HYPERVISOR_ATTR_RW(_name) \ | |
28 | static struct hyp_sysfs_attr _name##_attr = \ | |
29 | __ATTR(_name, 0644, _name##_show, _name##_store) | |
30 | ||
31 | struct hyp_sysfs_attr { | |
32 | struct attribute attr; | |
33 | ssize_t (*show)(struct hyp_sysfs_attr *, char *); | |
34 | ssize_t (*store)(struct hyp_sysfs_attr *, const char *, size_t); | |
35 | void *hyp_attr_data; | |
36 | }; | |
37 | ||
38 | static ssize_t type_show(struct hyp_sysfs_attr *attr, char *buffer) | |
39 | { | |
40 | return sprintf(buffer, "xen\n"); | |
41 | } | |
42 | ||
43 | HYPERVISOR_ATTR_RO(type); | |
44 | ||
45 | static int __init xen_sysfs_type_init(void) | |
46 | { | |
47 | return sysfs_create_file(hypervisor_kobj, &type_attr.attr); | |
48 | } | |
49 | ||
4a4c29c9 JG |
50 | static ssize_t guest_type_show(struct hyp_sysfs_attr *attr, char *buffer) |
51 | { | |
52 | const char *type; | |
53 | ||
54 | switch (xen_domain_type) { | |
55 | case XEN_NATIVE: | |
56 | /* ARM only. */ | |
57 | type = "Xen"; | |
58 | break; | |
59 | case XEN_PV_DOMAIN: | |
60 | type = "PV"; | |
61 | break; | |
62 | case XEN_HVM_DOMAIN: | |
63 | type = xen_pvh_domain() ? "PVH" : "HVM"; | |
64 | break; | |
65 | default: | |
66 | return -EINVAL; | |
67 | } | |
68 | ||
69 | return sprintf(buffer, "%s\n", type); | |
70 | } | |
71 | ||
72 | HYPERVISOR_ATTR_RO(guest_type); | |
73 | ||
74 | static int __init xen_sysfs_guest_type_init(void) | |
75 | { | |
76 | return sysfs_create_file(hypervisor_kobj, &guest_type_attr.attr); | |
77 | } | |
78 | ||
cff7e81b JF |
79 | /* xen version attributes */ |
80 | static ssize_t major_show(struct hyp_sysfs_attr *attr, char *buffer) | |
81 | { | |
82 | int version = HYPERVISOR_xen_version(XENVER_version, NULL); | |
83 | if (version) | |
84 | return sprintf(buffer, "%d\n", version >> 16); | |
85 | return -ENODEV; | |
86 | } | |
87 | ||
88 | HYPERVISOR_ATTR_RO(major); | |
89 | ||
90 | static ssize_t minor_show(struct hyp_sysfs_attr *attr, char *buffer) | |
91 | { | |
92 | int version = HYPERVISOR_xen_version(XENVER_version, NULL); | |
93 | if (version) | |
94 | return sprintf(buffer, "%d\n", version & 0xff); | |
95 | return -ENODEV; | |
96 | } | |
97 | ||
98 | HYPERVISOR_ATTR_RO(minor); | |
99 | ||
100 | static ssize_t extra_show(struct hyp_sysfs_attr *attr, char *buffer) | |
101 | { | |
102 | int ret = -ENOMEM; | |
103 | char *extra; | |
104 | ||
105 | extra = kmalloc(XEN_EXTRAVERSION_LEN, GFP_KERNEL); | |
106 | if (extra) { | |
107 | ret = HYPERVISOR_xen_version(XENVER_extraversion, extra); | |
108 | if (!ret) | |
109 | ret = sprintf(buffer, "%s\n", extra); | |
110 | kfree(extra); | |
111 | } | |
112 | ||
113 | return ret; | |
114 | } | |
115 | ||
116 | HYPERVISOR_ATTR_RO(extra); | |
117 | ||
118 | static struct attribute *version_attrs[] = { | |
119 | &major_attr.attr, | |
120 | &minor_attr.attr, | |
121 | &extra_attr.attr, | |
122 | NULL | |
123 | }; | |
124 | ||
ead1d014 | 125 | static const struct attribute_group version_group = { |
cff7e81b JF |
126 | .name = "version", |
127 | .attrs = version_attrs, | |
128 | }; | |
129 | ||
130 | static int __init xen_sysfs_version_init(void) | |
131 | { | |
132 | return sysfs_create_group(hypervisor_kobj, &version_group); | |
133 | } | |
134 | ||
cff7e81b JF |
135 | /* UUID */ |
136 | ||
5c13f806 | 137 | static ssize_t uuid_show_fallback(struct hyp_sysfs_attr *attr, char *buffer) |
cff7e81b JF |
138 | { |
139 | char *vm, *val; | |
140 | int ret; | |
141 | extern int xenstored_ready; | |
142 | ||
143 | if (!xenstored_ready) | |
144 | return -EBUSY; | |
145 | ||
146 | vm = xenbus_read(XBT_NIL, "vm", "", NULL); | |
147 | if (IS_ERR(vm)) | |
148 | return PTR_ERR(vm); | |
149 | val = xenbus_read(XBT_NIL, vm, "uuid", NULL); | |
150 | kfree(vm); | |
151 | if (IS_ERR(val)) | |
152 | return PTR_ERR(val); | |
153 | ret = sprintf(buffer, "%s\n", val); | |
154 | kfree(val); | |
155 | return ret; | |
156 | } | |
157 | ||
5c13f806 DDG |
158 | static ssize_t uuid_show(struct hyp_sysfs_attr *attr, char *buffer) |
159 | { | |
160 | xen_domain_handle_t uuid; | |
161 | int ret; | |
162 | ret = HYPERVISOR_xen_version(XENVER_guest_handle, uuid); | |
163 | if (ret) | |
164 | return uuid_show_fallback(attr, buffer); | |
165 | ret = sprintf(buffer, "%pU\n", uuid); | |
166 | return ret; | |
167 | } | |
168 | ||
cff7e81b JF |
169 | HYPERVISOR_ATTR_RO(uuid); |
170 | ||
171 | static int __init xen_sysfs_uuid_init(void) | |
172 | { | |
173 | return sysfs_create_file(hypervisor_kobj, &uuid_attr.attr); | |
174 | } | |
175 | ||
cff7e81b JF |
176 | /* xen compilation attributes */ |
177 | ||
178 | static ssize_t compiler_show(struct hyp_sysfs_attr *attr, char *buffer) | |
179 | { | |
180 | int ret = -ENOMEM; | |
181 | struct xen_compile_info *info; | |
182 | ||
183 | info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL); | |
184 | if (info) { | |
185 | ret = HYPERVISOR_xen_version(XENVER_compile_info, info); | |
186 | if (!ret) | |
187 | ret = sprintf(buffer, "%s\n", info->compiler); | |
188 | kfree(info); | |
189 | } | |
190 | ||
191 | return ret; | |
192 | } | |
193 | ||
194 | HYPERVISOR_ATTR_RO(compiler); | |
195 | ||
196 | static ssize_t compiled_by_show(struct hyp_sysfs_attr *attr, char *buffer) | |
197 | { | |
198 | int ret = -ENOMEM; | |
199 | struct xen_compile_info *info; | |
200 | ||
201 | info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL); | |
202 | if (info) { | |
203 | ret = HYPERVISOR_xen_version(XENVER_compile_info, info); | |
204 | if (!ret) | |
205 | ret = sprintf(buffer, "%s\n", info->compile_by); | |
206 | kfree(info); | |
207 | } | |
208 | ||
209 | return ret; | |
210 | } | |
211 | ||
212 | HYPERVISOR_ATTR_RO(compiled_by); | |
213 | ||
214 | static ssize_t compile_date_show(struct hyp_sysfs_attr *attr, char *buffer) | |
215 | { | |
216 | int ret = -ENOMEM; | |
217 | struct xen_compile_info *info; | |
218 | ||
219 | info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL); | |
220 | if (info) { | |
221 | ret = HYPERVISOR_xen_version(XENVER_compile_info, info); | |
222 | if (!ret) | |
223 | ret = sprintf(buffer, "%s\n", info->compile_date); | |
224 | kfree(info); | |
225 | } | |
226 | ||
227 | return ret; | |
228 | } | |
229 | ||
230 | HYPERVISOR_ATTR_RO(compile_date); | |
231 | ||
232 | static struct attribute *xen_compile_attrs[] = { | |
233 | &compiler_attr.attr, | |
234 | &compiled_by_attr.attr, | |
235 | &compile_date_attr.attr, | |
236 | NULL | |
237 | }; | |
238 | ||
ead1d014 | 239 | static const struct attribute_group xen_compilation_group = { |
cff7e81b JF |
240 | .name = "compilation", |
241 | .attrs = xen_compile_attrs, | |
242 | }; | |
243 | ||
5b00b504 | 244 | static int __init xen_sysfs_compilation_init(void) |
cff7e81b JF |
245 | { |
246 | return sysfs_create_group(hypervisor_kobj, &xen_compilation_group); | |
247 | } | |
248 | ||
cff7e81b JF |
249 | /* xen properties info */ |
250 | ||
251 | static ssize_t capabilities_show(struct hyp_sysfs_attr *attr, char *buffer) | |
252 | { | |
253 | int ret = -ENOMEM; | |
254 | char *caps; | |
255 | ||
256 | caps = kmalloc(XEN_CAPABILITIES_INFO_LEN, GFP_KERNEL); | |
257 | if (caps) { | |
258 | ret = HYPERVISOR_xen_version(XENVER_capabilities, caps); | |
259 | if (!ret) | |
260 | ret = sprintf(buffer, "%s\n", caps); | |
261 | kfree(caps); | |
262 | } | |
263 | ||
264 | return ret; | |
265 | } | |
266 | ||
267 | HYPERVISOR_ATTR_RO(capabilities); | |
268 | ||
269 | static ssize_t changeset_show(struct hyp_sysfs_attr *attr, char *buffer) | |
270 | { | |
271 | int ret = -ENOMEM; | |
272 | char *cset; | |
273 | ||
274 | cset = kmalloc(XEN_CHANGESET_INFO_LEN, GFP_KERNEL); | |
275 | if (cset) { | |
276 | ret = HYPERVISOR_xen_version(XENVER_changeset, cset); | |
277 | if (!ret) | |
278 | ret = sprintf(buffer, "%s\n", cset); | |
279 | kfree(cset); | |
280 | } | |
281 | ||
282 | return ret; | |
283 | } | |
284 | ||
285 | HYPERVISOR_ATTR_RO(changeset); | |
286 | ||
287 | static ssize_t virtual_start_show(struct hyp_sysfs_attr *attr, char *buffer) | |
288 | { | |
289 | int ret = -ENOMEM; | |
290 | struct xen_platform_parameters *parms; | |
291 | ||
292 | parms = kmalloc(sizeof(struct xen_platform_parameters), GFP_KERNEL); | |
293 | if (parms) { | |
294 | ret = HYPERVISOR_xen_version(XENVER_platform_parameters, | |
295 | parms); | |
296 | if (!ret) | |
37ea0fcb IC |
297 | ret = sprintf(buffer, "%"PRI_xen_ulong"\n", |
298 | parms->virt_start); | |
cff7e81b JF |
299 | kfree(parms); |
300 | } | |
301 | ||
302 | return ret; | |
303 | } | |
304 | ||
305 | HYPERVISOR_ATTR_RO(virtual_start); | |
306 | ||
307 | static ssize_t pagesize_show(struct hyp_sysfs_attr *attr, char *buffer) | |
308 | { | |
309 | int ret; | |
310 | ||
311 | ret = HYPERVISOR_xen_version(XENVER_pagesize, NULL); | |
312 | if (ret > 0) | |
313 | ret = sprintf(buffer, "%x\n", ret); | |
314 | ||
315 | return ret; | |
316 | } | |
317 | ||
318 | HYPERVISOR_ATTR_RO(pagesize); | |
319 | ||
cff7e81b JF |
320 | static ssize_t xen_feature_show(int index, char *buffer) |
321 | { | |
a649b720 JF |
322 | ssize_t ret; |
323 | struct xen_feature_info info; | |
cff7e81b | 324 | |
a649b720 JF |
325 | info.submap_idx = index; |
326 | ret = HYPERVISOR_xen_version(XENVER_get_features, &info); | |
327 | if (!ret) | |
328 | ret = sprintf(buffer, "%08x", info.submap); | |
cff7e81b JF |
329 | |
330 | return ret; | |
331 | } | |
332 | ||
a649b720 | 333 | static ssize_t features_show(struct hyp_sysfs_attr *attr, char *buffer) |
cff7e81b | 334 | { |
a649b720 JF |
335 | ssize_t len; |
336 | int i; | |
337 | ||
338 | len = 0; | |
339 | for (i = XENFEAT_NR_SUBMAPS-1; i >= 0; i--) { | |
340 | int ret = xen_feature_show(i, buffer + len); | |
341 | if (ret < 0) { | |
342 | if (len == 0) | |
343 | len = ret; | |
344 | break; | |
345 | } | |
346 | len += ret; | |
347 | } | |
348 | if (len > 0) | |
349 | buffer[len++] = '\n'; | |
350 | ||
351 | return len; | |
cff7e81b JF |
352 | } |
353 | ||
a649b720 | 354 | HYPERVISOR_ATTR_RO(features); |
cff7e81b | 355 | |
84b76257 JG |
356 | static ssize_t buildid_show(struct hyp_sysfs_attr *attr, char *buffer) |
357 | { | |
358 | ssize_t ret; | |
359 | struct xen_build_id *buildid; | |
360 | ||
361 | ret = HYPERVISOR_xen_version(XENVER_build_id, NULL); | |
362 | if (ret < 0) { | |
363 | if (ret == -EPERM) | |
364 | ret = sprintf(buffer, "<denied>"); | |
365 | return ret; | |
366 | } | |
367 | ||
368 | buildid = kmalloc(sizeof(*buildid) + ret, GFP_KERNEL); | |
369 | if (!buildid) | |
370 | return -ENOMEM; | |
371 | ||
372 | buildid->len = ret; | |
373 | ret = HYPERVISOR_xen_version(XENVER_build_id, buildid); | |
374 | if (ret > 0) | |
375 | ret = sprintf(buffer, "%s", buildid->buf); | |
376 | kfree(buildid); | |
377 | ||
378 | return ret; | |
379 | } | |
380 | ||
381 | HYPERVISOR_ATTR_RO(buildid); | |
382 | ||
cff7e81b JF |
383 | static struct attribute *xen_properties_attrs[] = { |
384 | &capabilities_attr.attr, | |
385 | &changeset_attr.attr, | |
386 | &virtual_start_attr.attr, | |
387 | &pagesize_attr.attr, | |
a649b720 | 388 | &features_attr.attr, |
84b76257 | 389 | &buildid_attr.attr, |
cff7e81b JF |
390 | NULL |
391 | }; | |
392 | ||
ead1d014 | 393 | static const struct attribute_group xen_properties_group = { |
cff7e81b JF |
394 | .name = "properties", |
395 | .attrs = xen_properties_attrs, | |
396 | }; | |
397 | ||
5b00b504 | 398 | static int __init xen_sysfs_properties_init(void) |
cff7e81b JF |
399 | { |
400 | return sysfs_create_group(hypervisor_kobj, &xen_properties_group); | |
401 | } | |
402 | ||
5f141548 BO |
403 | #ifdef CONFIG_XEN_HAVE_VPMU |
404 | struct pmu_mode { | |
405 | const char *name; | |
406 | uint32_t mode; | |
407 | }; | |
408 | ||
409 | static struct pmu_mode pmu_modes[] = { | |
410 | {"off", XENPMU_MODE_OFF}, | |
411 | {"self", XENPMU_MODE_SELF}, | |
412 | {"hv", XENPMU_MODE_HV}, | |
413 | {"all", XENPMU_MODE_ALL} | |
414 | }; | |
415 | ||
416 | static ssize_t pmu_mode_store(struct hyp_sysfs_attr *attr, | |
417 | const char *buffer, size_t len) | |
418 | { | |
419 | int ret; | |
420 | struct xen_pmu_params xp; | |
421 | int i; | |
422 | ||
423 | for (i = 0; i < ARRAY_SIZE(pmu_modes); i++) { | |
424 | if (strncmp(buffer, pmu_modes[i].name, len - 1) == 0) { | |
425 | xp.val = pmu_modes[i].mode; | |
426 | break; | |
427 | } | |
428 | } | |
429 | ||
430 | if (i == ARRAY_SIZE(pmu_modes)) | |
431 | return -EINVAL; | |
432 | ||
433 | xp.version.maj = XENPMU_VER_MAJ; | |
434 | xp.version.min = XENPMU_VER_MIN; | |
435 | ret = HYPERVISOR_xenpmu_op(XENPMU_mode_set, &xp); | |
436 | if (ret) | |
437 | return ret; | |
438 | ||
439 | return len; | |
440 | } | |
441 | ||
442 | static ssize_t pmu_mode_show(struct hyp_sysfs_attr *attr, char *buffer) | |
443 | { | |
444 | int ret; | |
445 | struct xen_pmu_params xp; | |
446 | int i; | |
447 | uint32_t mode; | |
448 | ||
449 | xp.version.maj = XENPMU_VER_MAJ; | |
450 | xp.version.min = XENPMU_VER_MIN; | |
451 | ret = HYPERVISOR_xenpmu_op(XENPMU_mode_get, &xp); | |
452 | if (ret) | |
453 | return ret; | |
454 | ||
455 | mode = (uint32_t)xp.val; | |
456 | for (i = 0; i < ARRAY_SIZE(pmu_modes); i++) { | |
457 | if (mode == pmu_modes[i].mode) | |
458 | return sprintf(buffer, "%s\n", pmu_modes[i].name); | |
459 | } | |
460 | ||
461 | return -EINVAL; | |
462 | } | |
463 | HYPERVISOR_ATTR_RW(pmu_mode); | |
464 | ||
465 | static ssize_t pmu_features_store(struct hyp_sysfs_attr *attr, | |
466 | const char *buffer, size_t len) | |
467 | { | |
468 | int ret; | |
469 | uint32_t features; | |
470 | struct xen_pmu_params xp; | |
471 | ||
472 | ret = kstrtou32(buffer, 0, &features); | |
473 | if (ret) | |
474 | return ret; | |
475 | ||
476 | xp.val = features; | |
477 | xp.version.maj = XENPMU_VER_MAJ; | |
478 | xp.version.min = XENPMU_VER_MIN; | |
479 | ret = HYPERVISOR_xenpmu_op(XENPMU_feature_set, &xp); | |
480 | if (ret) | |
481 | return ret; | |
482 | ||
483 | return len; | |
484 | } | |
485 | ||
486 | static ssize_t pmu_features_show(struct hyp_sysfs_attr *attr, char *buffer) | |
487 | { | |
488 | int ret; | |
489 | struct xen_pmu_params xp; | |
490 | ||
491 | xp.version.maj = XENPMU_VER_MAJ; | |
492 | xp.version.min = XENPMU_VER_MIN; | |
493 | ret = HYPERVISOR_xenpmu_op(XENPMU_feature_get, &xp); | |
494 | if (ret) | |
495 | return ret; | |
496 | ||
497 | return sprintf(buffer, "0x%x\n", (uint32_t)xp.val); | |
498 | } | |
499 | HYPERVISOR_ATTR_RW(pmu_features); | |
500 | ||
501 | static struct attribute *xen_pmu_attrs[] = { | |
502 | &pmu_mode_attr.attr, | |
503 | &pmu_features_attr.attr, | |
504 | NULL | |
505 | }; | |
506 | ||
507 | static const struct attribute_group xen_pmu_group = { | |
508 | .name = "pmu", | |
509 | .attrs = xen_pmu_attrs, | |
510 | }; | |
511 | ||
5b00b504 | 512 | static int __init xen_sysfs_pmu_init(void) |
5f141548 BO |
513 | { |
514 | return sysfs_create_group(hypervisor_kobj, &xen_pmu_group); | |
515 | } | |
5f141548 BO |
516 | #endif |
517 | ||
cff7e81b JF |
518 | static int __init hyper_sysfs_init(void) |
519 | { | |
520 | int ret; | |
521 | ||
522 | if (!xen_domain()) | |
523 | return -ENODEV; | |
524 | ||
525 | ret = xen_sysfs_type_init(); | |
526 | if (ret) | |
527 | goto out; | |
4a4c29c9 JG |
528 | ret = xen_sysfs_guest_type_init(); |
529 | if (ret) | |
530 | goto guest_type_out; | |
cff7e81b JF |
531 | ret = xen_sysfs_version_init(); |
532 | if (ret) | |
533 | goto version_out; | |
5b00b504 | 534 | ret = xen_sysfs_compilation_init(); |
cff7e81b JF |
535 | if (ret) |
536 | goto comp_out; | |
537 | ret = xen_sysfs_uuid_init(); | |
538 | if (ret) | |
539 | goto uuid_out; | |
5b00b504 | 540 | ret = xen_sysfs_properties_init(); |
cff7e81b JF |
541 | if (ret) |
542 | goto prop_out; | |
5f141548 BO |
543 | #ifdef CONFIG_XEN_HAVE_VPMU |
544 | if (xen_initial_domain()) { | |
5b00b504 | 545 | ret = xen_sysfs_pmu_init(); |
5f141548 | 546 | if (ret) { |
46894f17 PG |
547 | sysfs_remove_group(hypervisor_kobj, |
548 | &xen_properties_group); | |
5f141548 BO |
549 | goto prop_out; |
550 | } | |
551 | } | |
552 | #endif | |
cff7e81b JF |
553 | goto out; |
554 | ||
cff7e81b | 555 | prop_out: |
46894f17 | 556 | sysfs_remove_file(hypervisor_kobj, &uuid_attr.attr); |
cff7e81b | 557 | uuid_out: |
46894f17 | 558 | sysfs_remove_group(hypervisor_kobj, &xen_compilation_group); |
cff7e81b | 559 | comp_out: |
46894f17 | 560 | sysfs_remove_group(hypervisor_kobj, &version_group); |
cff7e81b | 561 | version_out: |
4a4c29c9 JG |
562 | sysfs_remove_file(hypervisor_kobj, &guest_type_attr.attr); |
563 | guest_type_out: | |
46894f17 | 564 | sysfs_remove_file(hypervisor_kobj, &type_attr.attr); |
cff7e81b JF |
565 | out: |
566 | return ret; | |
567 | } | |
46894f17 | 568 | device_initcall(hyper_sysfs_init); |
cff7e81b JF |
569 | |
570 | static ssize_t hyp_sysfs_show(struct kobject *kobj, | |
571 | struct attribute *attr, | |
572 | char *buffer) | |
573 | { | |
574 | struct hyp_sysfs_attr *hyp_attr; | |
575 | hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr); | |
576 | if (hyp_attr->show) | |
577 | return hyp_attr->show(hyp_attr, buffer); | |
578 | return 0; | |
579 | } | |
580 | ||
581 | static ssize_t hyp_sysfs_store(struct kobject *kobj, | |
582 | struct attribute *attr, | |
583 | const char *buffer, | |
584 | size_t len) | |
585 | { | |
586 | struct hyp_sysfs_attr *hyp_attr; | |
587 | hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr); | |
588 | if (hyp_attr->store) | |
589 | return hyp_attr->store(hyp_attr, buffer, len); | |
590 | return 0; | |
591 | } | |
592 | ||
52cf25d0 | 593 | static const struct sysfs_ops hyp_sysfs_ops = { |
cff7e81b JF |
594 | .show = hyp_sysfs_show, |
595 | .store = hyp_sysfs_store, | |
596 | }; | |
597 | ||
598 | static struct kobj_type hyp_sysfs_kobj_type = { | |
599 | .sysfs_ops = &hyp_sysfs_ops, | |
600 | }; | |
601 | ||
602 | static int __init hypervisor_subsys_init(void) | |
603 | { | |
604 | if (!xen_domain()) | |
605 | return -ENODEV; | |
606 | ||
607 | hypervisor_kobj->ktype = &hyp_sysfs_kobj_type; | |
608 | return 0; | |
609 | } | |
610 | device_initcall(hypervisor_subsys_init); |