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 JF |
11 | #include <linux/kernel.h> |
12 | #include <linux/module.h> | |
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> | |
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 | ||
50 | static void xen_sysfs_type_destroy(void) | |
51 | { | |
52 | sysfs_remove_file(hypervisor_kobj, &type_attr.attr); | |
53 | } | |
54 | ||
55 | /* xen version attributes */ | |
56 | static ssize_t major_show(struct hyp_sysfs_attr *attr, char *buffer) | |
57 | { | |
58 | int version = HYPERVISOR_xen_version(XENVER_version, NULL); | |
59 | if (version) | |
60 | return sprintf(buffer, "%d\n", version >> 16); | |
61 | return -ENODEV; | |
62 | } | |
63 | ||
64 | HYPERVISOR_ATTR_RO(major); | |
65 | ||
66 | static ssize_t minor_show(struct hyp_sysfs_attr *attr, char *buffer) | |
67 | { | |
68 | int version = HYPERVISOR_xen_version(XENVER_version, NULL); | |
69 | if (version) | |
70 | return sprintf(buffer, "%d\n", version & 0xff); | |
71 | return -ENODEV; | |
72 | } | |
73 | ||
74 | HYPERVISOR_ATTR_RO(minor); | |
75 | ||
76 | static ssize_t extra_show(struct hyp_sysfs_attr *attr, char *buffer) | |
77 | { | |
78 | int ret = -ENOMEM; | |
79 | char *extra; | |
80 | ||
81 | extra = kmalloc(XEN_EXTRAVERSION_LEN, GFP_KERNEL); | |
82 | if (extra) { | |
83 | ret = HYPERVISOR_xen_version(XENVER_extraversion, extra); | |
84 | if (!ret) | |
85 | ret = sprintf(buffer, "%s\n", extra); | |
86 | kfree(extra); | |
87 | } | |
88 | ||
89 | return ret; | |
90 | } | |
91 | ||
92 | HYPERVISOR_ATTR_RO(extra); | |
93 | ||
94 | static struct attribute *version_attrs[] = { | |
95 | &major_attr.attr, | |
96 | &minor_attr.attr, | |
97 | &extra_attr.attr, | |
98 | NULL | |
99 | }; | |
100 | ||
ead1d014 | 101 | static const struct attribute_group version_group = { |
cff7e81b JF |
102 | .name = "version", |
103 | .attrs = version_attrs, | |
104 | }; | |
105 | ||
106 | static int __init xen_sysfs_version_init(void) | |
107 | { | |
108 | return sysfs_create_group(hypervisor_kobj, &version_group); | |
109 | } | |
110 | ||
111 | static void xen_sysfs_version_destroy(void) | |
112 | { | |
113 | sysfs_remove_group(hypervisor_kobj, &version_group); | |
114 | } | |
115 | ||
116 | /* UUID */ | |
117 | ||
5c13f806 | 118 | static ssize_t uuid_show_fallback(struct hyp_sysfs_attr *attr, char *buffer) |
cff7e81b JF |
119 | { |
120 | char *vm, *val; | |
121 | int ret; | |
122 | extern int xenstored_ready; | |
123 | ||
124 | if (!xenstored_ready) | |
125 | return -EBUSY; | |
126 | ||
127 | vm = xenbus_read(XBT_NIL, "vm", "", NULL); | |
128 | if (IS_ERR(vm)) | |
129 | return PTR_ERR(vm); | |
130 | val = xenbus_read(XBT_NIL, vm, "uuid", NULL); | |
131 | kfree(vm); | |
132 | if (IS_ERR(val)) | |
133 | return PTR_ERR(val); | |
134 | ret = sprintf(buffer, "%s\n", val); | |
135 | kfree(val); | |
136 | return ret; | |
137 | } | |
138 | ||
5c13f806 DDG |
139 | static ssize_t uuid_show(struct hyp_sysfs_attr *attr, char *buffer) |
140 | { | |
141 | xen_domain_handle_t uuid; | |
142 | int ret; | |
143 | ret = HYPERVISOR_xen_version(XENVER_guest_handle, uuid); | |
144 | if (ret) | |
145 | return uuid_show_fallback(attr, buffer); | |
146 | ret = sprintf(buffer, "%pU\n", uuid); | |
147 | return ret; | |
148 | } | |
149 | ||
cff7e81b JF |
150 | HYPERVISOR_ATTR_RO(uuid); |
151 | ||
152 | static int __init xen_sysfs_uuid_init(void) | |
153 | { | |
154 | return sysfs_create_file(hypervisor_kobj, &uuid_attr.attr); | |
155 | } | |
156 | ||
157 | static void xen_sysfs_uuid_destroy(void) | |
158 | { | |
159 | sysfs_remove_file(hypervisor_kobj, &uuid_attr.attr); | |
160 | } | |
161 | ||
162 | /* xen compilation attributes */ | |
163 | ||
164 | static ssize_t compiler_show(struct hyp_sysfs_attr *attr, char *buffer) | |
165 | { | |
166 | int ret = -ENOMEM; | |
167 | struct xen_compile_info *info; | |
168 | ||
169 | info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL); | |
170 | if (info) { | |
171 | ret = HYPERVISOR_xen_version(XENVER_compile_info, info); | |
172 | if (!ret) | |
173 | ret = sprintf(buffer, "%s\n", info->compiler); | |
174 | kfree(info); | |
175 | } | |
176 | ||
177 | return ret; | |
178 | } | |
179 | ||
180 | HYPERVISOR_ATTR_RO(compiler); | |
181 | ||
182 | static ssize_t compiled_by_show(struct hyp_sysfs_attr *attr, char *buffer) | |
183 | { | |
184 | int ret = -ENOMEM; | |
185 | struct xen_compile_info *info; | |
186 | ||
187 | info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL); | |
188 | if (info) { | |
189 | ret = HYPERVISOR_xen_version(XENVER_compile_info, info); | |
190 | if (!ret) | |
191 | ret = sprintf(buffer, "%s\n", info->compile_by); | |
192 | kfree(info); | |
193 | } | |
194 | ||
195 | return ret; | |
196 | } | |
197 | ||
198 | HYPERVISOR_ATTR_RO(compiled_by); | |
199 | ||
200 | static ssize_t compile_date_show(struct hyp_sysfs_attr *attr, char *buffer) | |
201 | { | |
202 | int ret = -ENOMEM; | |
203 | struct xen_compile_info *info; | |
204 | ||
205 | info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL); | |
206 | if (info) { | |
207 | ret = HYPERVISOR_xen_version(XENVER_compile_info, info); | |
208 | if (!ret) | |
209 | ret = sprintf(buffer, "%s\n", info->compile_date); | |
210 | kfree(info); | |
211 | } | |
212 | ||
213 | return ret; | |
214 | } | |
215 | ||
216 | HYPERVISOR_ATTR_RO(compile_date); | |
217 | ||
218 | static struct attribute *xen_compile_attrs[] = { | |
219 | &compiler_attr.attr, | |
220 | &compiled_by_attr.attr, | |
221 | &compile_date_attr.attr, | |
222 | NULL | |
223 | }; | |
224 | ||
ead1d014 | 225 | static const struct attribute_group xen_compilation_group = { |
cff7e81b JF |
226 | .name = "compilation", |
227 | .attrs = xen_compile_attrs, | |
228 | }; | |
229 | ||
887cb456 | 230 | static int __init xen_compilation_init(void) |
cff7e81b JF |
231 | { |
232 | return sysfs_create_group(hypervisor_kobj, &xen_compilation_group); | |
233 | } | |
234 | ||
235 | static void xen_compilation_destroy(void) | |
236 | { | |
237 | sysfs_remove_group(hypervisor_kobj, &xen_compilation_group); | |
238 | } | |
239 | ||
240 | /* xen properties info */ | |
241 | ||
242 | static ssize_t capabilities_show(struct hyp_sysfs_attr *attr, char *buffer) | |
243 | { | |
244 | int ret = -ENOMEM; | |
245 | char *caps; | |
246 | ||
247 | caps = kmalloc(XEN_CAPABILITIES_INFO_LEN, GFP_KERNEL); | |
248 | if (caps) { | |
249 | ret = HYPERVISOR_xen_version(XENVER_capabilities, caps); | |
250 | if (!ret) | |
251 | ret = sprintf(buffer, "%s\n", caps); | |
252 | kfree(caps); | |
253 | } | |
254 | ||
255 | return ret; | |
256 | } | |
257 | ||
258 | HYPERVISOR_ATTR_RO(capabilities); | |
259 | ||
260 | static ssize_t changeset_show(struct hyp_sysfs_attr *attr, char *buffer) | |
261 | { | |
262 | int ret = -ENOMEM; | |
263 | char *cset; | |
264 | ||
265 | cset = kmalloc(XEN_CHANGESET_INFO_LEN, GFP_KERNEL); | |
266 | if (cset) { | |
267 | ret = HYPERVISOR_xen_version(XENVER_changeset, cset); | |
268 | if (!ret) | |
269 | ret = sprintf(buffer, "%s\n", cset); | |
270 | kfree(cset); | |
271 | } | |
272 | ||
273 | return ret; | |
274 | } | |
275 | ||
276 | HYPERVISOR_ATTR_RO(changeset); | |
277 | ||
278 | static ssize_t virtual_start_show(struct hyp_sysfs_attr *attr, char *buffer) | |
279 | { | |
280 | int ret = -ENOMEM; | |
281 | struct xen_platform_parameters *parms; | |
282 | ||
283 | parms = kmalloc(sizeof(struct xen_platform_parameters), GFP_KERNEL); | |
284 | if (parms) { | |
285 | ret = HYPERVISOR_xen_version(XENVER_platform_parameters, | |
286 | parms); | |
287 | if (!ret) | |
37ea0fcb IC |
288 | ret = sprintf(buffer, "%"PRI_xen_ulong"\n", |
289 | parms->virt_start); | |
cff7e81b JF |
290 | kfree(parms); |
291 | } | |
292 | ||
293 | return ret; | |
294 | } | |
295 | ||
296 | HYPERVISOR_ATTR_RO(virtual_start); | |
297 | ||
298 | static ssize_t pagesize_show(struct hyp_sysfs_attr *attr, char *buffer) | |
299 | { | |
300 | int ret; | |
301 | ||
302 | ret = HYPERVISOR_xen_version(XENVER_pagesize, NULL); | |
303 | if (ret > 0) | |
304 | ret = sprintf(buffer, "%x\n", ret); | |
305 | ||
306 | return ret; | |
307 | } | |
308 | ||
309 | HYPERVISOR_ATTR_RO(pagesize); | |
310 | ||
cff7e81b JF |
311 | static ssize_t xen_feature_show(int index, char *buffer) |
312 | { | |
a649b720 JF |
313 | ssize_t ret; |
314 | struct xen_feature_info info; | |
cff7e81b | 315 | |
a649b720 JF |
316 | info.submap_idx = index; |
317 | ret = HYPERVISOR_xen_version(XENVER_get_features, &info); | |
318 | if (!ret) | |
319 | ret = sprintf(buffer, "%08x", info.submap); | |
cff7e81b JF |
320 | |
321 | return ret; | |
322 | } | |
323 | ||
a649b720 | 324 | static ssize_t features_show(struct hyp_sysfs_attr *attr, char *buffer) |
cff7e81b | 325 | { |
a649b720 JF |
326 | ssize_t len; |
327 | int i; | |
328 | ||
329 | len = 0; | |
330 | for (i = XENFEAT_NR_SUBMAPS-1; i >= 0; i--) { | |
331 | int ret = xen_feature_show(i, buffer + len); | |
332 | if (ret < 0) { | |
333 | if (len == 0) | |
334 | len = ret; | |
335 | break; | |
336 | } | |
337 | len += ret; | |
338 | } | |
339 | if (len > 0) | |
340 | buffer[len++] = '\n'; | |
341 | ||
342 | return len; | |
cff7e81b JF |
343 | } |
344 | ||
a649b720 | 345 | HYPERVISOR_ATTR_RO(features); |
cff7e81b JF |
346 | |
347 | static struct attribute *xen_properties_attrs[] = { | |
348 | &capabilities_attr.attr, | |
349 | &changeset_attr.attr, | |
350 | &virtual_start_attr.attr, | |
351 | &pagesize_attr.attr, | |
a649b720 | 352 | &features_attr.attr, |
cff7e81b JF |
353 | NULL |
354 | }; | |
355 | ||
ead1d014 | 356 | static const struct attribute_group xen_properties_group = { |
cff7e81b JF |
357 | .name = "properties", |
358 | .attrs = xen_properties_attrs, | |
359 | }; | |
360 | ||
361 | static int __init xen_properties_init(void) | |
362 | { | |
363 | return sysfs_create_group(hypervisor_kobj, &xen_properties_group); | |
364 | } | |
365 | ||
366 | static void xen_properties_destroy(void) | |
367 | { | |
368 | sysfs_remove_group(hypervisor_kobj, &xen_properties_group); | |
369 | } | |
370 | ||
cff7e81b JF |
371 | static int __init hyper_sysfs_init(void) |
372 | { | |
373 | int ret; | |
374 | ||
375 | if (!xen_domain()) | |
376 | return -ENODEV; | |
377 | ||
378 | ret = xen_sysfs_type_init(); | |
379 | if (ret) | |
380 | goto out; | |
381 | ret = xen_sysfs_version_init(); | |
382 | if (ret) | |
383 | goto version_out; | |
384 | ret = xen_compilation_init(); | |
385 | if (ret) | |
386 | goto comp_out; | |
387 | ret = xen_sysfs_uuid_init(); | |
388 | if (ret) | |
389 | goto uuid_out; | |
390 | ret = xen_properties_init(); | |
391 | if (ret) | |
392 | goto prop_out; | |
cff7e81b JF |
393 | |
394 | goto out; | |
395 | ||
cff7e81b JF |
396 | prop_out: |
397 | xen_sysfs_uuid_destroy(); | |
398 | uuid_out: | |
399 | xen_compilation_destroy(); | |
400 | comp_out: | |
401 | xen_sysfs_version_destroy(); | |
402 | version_out: | |
403 | xen_sysfs_type_destroy(); | |
404 | out: | |
405 | return ret; | |
406 | } | |
407 | ||
408 | static void __exit hyper_sysfs_exit(void) | |
409 | { | |
cff7e81b JF |
410 | xen_properties_destroy(); |
411 | xen_compilation_destroy(); | |
412 | xen_sysfs_uuid_destroy(); | |
413 | xen_sysfs_version_destroy(); | |
414 | xen_sysfs_type_destroy(); | |
415 | ||
416 | } | |
417 | module_init(hyper_sysfs_init); | |
418 | module_exit(hyper_sysfs_exit); | |
419 | ||
420 | static ssize_t hyp_sysfs_show(struct kobject *kobj, | |
421 | struct attribute *attr, | |
422 | char *buffer) | |
423 | { | |
424 | struct hyp_sysfs_attr *hyp_attr; | |
425 | hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr); | |
426 | if (hyp_attr->show) | |
427 | return hyp_attr->show(hyp_attr, buffer); | |
428 | return 0; | |
429 | } | |
430 | ||
431 | static ssize_t hyp_sysfs_store(struct kobject *kobj, | |
432 | struct attribute *attr, | |
433 | const char *buffer, | |
434 | size_t len) | |
435 | { | |
436 | struct hyp_sysfs_attr *hyp_attr; | |
437 | hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr); | |
438 | if (hyp_attr->store) | |
439 | return hyp_attr->store(hyp_attr, buffer, len); | |
440 | return 0; | |
441 | } | |
442 | ||
52cf25d0 | 443 | static const struct sysfs_ops hyp_sysfs_ops = { |
cff7e81b JF |
444 | .show = hyp_sysfs_show, |
445 | .store = hyp_sysfs_store, | |
446 | }; | |
447 | ||
448 | static struct kobj_type hyp_sysfs_kobj_type = { | |
449 | .sysfs_ops = &hyp_sysfs_ops, | |
450 | }; | |
451 | ||
452 | static int __init hypervisor_subsys_init(void) | |
453 | { | |
454 | if (!xen_domain()) | |
455 | return -ENODEV; | |
456 | ||
457 | hypervisor_kobj->ktype = &hyp_sysfs_kobj_type; | |
458 | return 0; | |
459 | } | |
460 | device_initcall(hypervisor_subsys_init); |