Commit | Line | Data |
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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> | |
14 | ||
15 | #include <asm/xen/hypervisor.h> | |
16 | #include <asm/xen/hypercall.h> | |
17 | ||
1ccbf534 | 18 | #include <xen/xen.h> |
cff7e81b JF |
19 | #include <xen/xenbus.h> |
20 | #include <xen/interface/xen.h> | |
21 | #include <xen/interface/version.h> | |
22 | ||
23 | #define HYPERVISOR_ATTR_RO(_name) \ | |
24 | static struct hyp_sysfs_attr _name##_attr = __ATTR_RO(_name) | |
25 | ||
26 | #define HYPERVISOR_ATTR_RW(_name) \ | |
27 | static struct hyp_sysfs_attr _name##_attr = \ | |
28 | __ATTR(_name, 0644, _name##_show, _name##_store) | |
29 | ||
30 | struct hyp_sysfs_attr { | |
31 | struct attribute attr; | |
32 | ssize_t (*show)(struct hyp_sysfs_attr *, char *); | |
33 | ssize_t (*store)(struct hyp_sysfs_attr *, const char *, size_t); | |
34 | void *hyp_attr_data; | |
35 | }; | |
36 | ||
37 | static ssize_t type_show(struct hyp_sysfs_attr *attr, char *buffer) | |
38 | { | |
39 | return sprintf(buffer, "xen\n"); | |
40 | } | |
41 | ||
42 | HYPERVISOR_ATTR_RO(type); | |
43 | ||
44 | static int __init xen_sysfs_type_init(void) | |
45 | { | |
46 | return sysfs_create_file(hypervisor_kobj, &type_attr.attr); | |
47 | } | |
48 | ||
49 | static void xen_sysfs_type_destroy(void) | |
50 | { | |
51 | sysfs_remove_file(hypervisor_kobj, &type_attr.attr); | |
52 | } | |
53 | ||
54 | /* xen version attributes */ | |
55 | static ssize_t major_show(struct hyp_sysfs_attr *attr, char *buffer) | |
56 | { | |
57 | int version = HYPERVISOR_xen_version(XENVER_version, NULL); | |
58 | if (version) | |
59 | return sprintf(buffer, "%d\n", version >> 16); | |
60 | return -ENODEV; | |
61 | } | |
62 | ||
63 | HYPERVISOR_ATTR_RO(major); | |
64 | ||
65 | static ssize_t minor_show(struct hyp_sysfs_attr *attr, char *buffer) | |
66 | { | |
67 | int version = HYPERVISOR_xen_version(XENVER_version, NULL); | |
68 | if (version) | |
69 | return sprintf(buffer, "%d\n", version & 0xff); | |
70 | return -ENODEV; | |
71 | } | |
72 | ||
73 | HYPERVISOR_ATTR_RO(minor); | |
74 | ||
75 | static ssize_t extra_show(struct hyp_sysfs_attr *attr, char *buffer) | |
76 | { | |
77 | int ret = -ENOMEM; | |
78 | char *extra; | |
79 | ||
80 | extra = kmalloc(XEN_EXTRAVERSION_LEN, GFP_KERNEL); | |
81 | if (extra) { | |
82 | ret = HYPERVISOR_xen_version(XENVER_extraversion, extra); | |
83 | if (!ret) | |
84 | ret = sprintf(buffer, "%s\n", extra); | |
85 | kfree(extra); | |
86 | } | |
87 | ||
88 | return ret; | |
89 | } | |
90 | ||
91 | HYPERVISOR_ATTR_RO(extra); | |
92 | ||
93 | static struct attribute *version_attrs[] = { | |
94 | &major_attr.attr, | |
95 | &minor_attr.attr, | |
96 | &extra_attr.attr, | |
97 | NULL | |
98 | }; | |
99 | ||
ead1d014 | 100 | static const struct attribute_group version_group = { |
cff7e81b JF |
101 | .name = "version", |
102 | .attrs = version_attrs, | |
103 | }; | |
104 | ||
105 | static int __init xen_sysfs_version_init(void) | |
106 | { | |
107 | return sysfs_create_group(hypervisor_kobj, &version_group); | |
108 | } | |
109 | ||
110 | static void xen_sysfs_version_destroy(void) | |
111 | { | |
112 | sysfs_remove_group(hypervisor_kobj, &version_group); | |
113 | } | |
114 | ||
115 | /* UUID */ | |
116 | ||
117 | static ssize_t uuid_show(struct hyp_sysfs_attr *attr, char *buffer) | |
118 | { | |
119 | char *vm, *val; | |
120 | int ret; | |
121 | extern int xenstored_ready; | |
122 | ||
123 | if (!xenstored_ready) | |
124 | return -EBUSY; | |
125 | ||
126 | vm = xenbus_read(XBT_NIL, "vm", "", NULL); | |
127 | if (IS_ERR(vm)) | |
128 | return PTR_ERR(vm); | |
129 | val = xenbus_read(XBT_NIL, vm, "uuid", NULL); | |
130 | kfree(vm); | |
131 | if (IS_ERR(val)) | |
132 | return PTR_ERR(val); | |
133 | ret = sprintf(buffer, "%s\n", val); | |
134 | kfree(val); | |
135 | return ret; | |
136 | } | |
137 | ||
138 | HYPERVISOR_ATTR_RO(uuid); | |
139 | ||
140 | static int __init xen_sysfs_uuid_init(void) | |
141 | { | |
142 | return sysfs_create_file(hypervisor_kobj, &uuid_attr.attr); | |
143 | } | |
144 | ||
145 | static void xen_sysfs_uuid_destroy(void) | |
146 | { | |
147 | sysfs_remove_file(hypervisor_kobj, &uuid_attr.attr); | |
148 | } | |
149 | ||
150 | /* xen compilation attributes */ | |
151 | ||
152 | static ssize_t compiler_show(struct hyp_sysfs_attr *attr, char *buffer) | |
153 | { | |
154 | int ret = -ENOMEM; | |
155 | struct xen_compile_info *info; | |
156 | ||
157 | info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL); | |
158 | if (info) { | |
159 | ret = HYPERVISOR_xen_version(XENVER_compile_info, info); | |
160 | if (!ret) | |
161 | ret = sprintf(buffer, "%s\n", info->compiler); | |
162 | kfree(info); | |
163 | } | |
164 | ||
165 | return ret; | |
166 | } | |
167 | ||
168 | HYPERVISOR_ATTR_RO(compiler); | |
169 | ||
170 | static ssize_t compiled_by_show(struct hyp_sysfs_attr *attr, char *buffer) | |
171 | { | |
172 | int ret = -ENOMEM; | |
173 | struct xen_compile_info *info; | |
174 | ||
175 | info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL); | |
176 | if (info) { | |
177 | ret = HYPERVISOR_xen_version(XENVER_compile_info, info); | |
178 | if (!ret) | |
179 | ret = sprintf(buffer, "%s\n", info->compile_by); | |
180 | kfree(info); | |
181 | } | |
182 | ||
183 | return ret; | |
184 | } | |
185 | ||
186 | HYPERVISOR_ATTR_RO(compiled_by); | |
187 | ||
188 | static ssize_t compile_date_show(struct hyp_sysfs_attr *attr, char *buffer) | |
189 | { | |
190 | int ret = -ENOMEM; | |
191 | struct xen_compile_info *info; | |
192 | ||
193 | info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL); | |
194 | if (info) { | |
195 | ret = HYPERVISOR_xen_version(XENVER_compile_info, info); | |
196 | if (!ret) | |
197 | ret = sprintf(buffer, "%s\n", info->compile_date); | |
198 | kfree(info); | |
199 | } | |
200 | ||
201 | return ret; | |
202 | } | |
203 | ||
204 | HYPERVISOR_ATTR_RO(compile_date); | |
205 | ||
206 | static struct attribute *xen_compile_attrs[] = { | |
207 | &compiler_attr.attr, | |
208 | &compiled_by_attr.attr, | |
209 | &compile_date_attr.attr, | |
210 | NULL | |
211 | }; | |
212 | ||
ead1d014 | 213 | static const struct attribute_group xen_compilation_group = { |
cff7e81b JF |
214 | .name = "compilation", |
215 | .attrs = xen_compile_attrs, | |
216 | }; | |
217 | ||
887cb456 | 218 | static int __init xen_compilation_init(void) |
cff7e81b JF |
219 | { |
220 | return sysfs_create_group(hypervisor_kobj, &xen_compilation_group); | |
221 | } | |
222 | ||
223 | static void xen_compilation_destroy(void) | |
224 | { | |
225 | sysfs_remove_group(hypervisor_kobj, &xen_compilation_group); | |
226 | } | |
227 | ||
228 | /* xen properties info */ | |
229 | ||
230 | static ssize_t capabilities_show(struct hyp_sysfs_attr *attr, char *buffer) | |
231 | { | |
232 | int ret = -ENOMEM; | |
233 | char *caps; | |
234 | ||
235 | caps = kmalloc(XEN_CAPABILITIES_INFO_LEN, GFP_KERNEL); | |
236 | if (caps) { | |
237 | ret = HYPERVISOR_xen_version(XENVER_capabilities, caps); | |
238 | if (!ret) | |
239 | ret = sprintf(buffer, "%s\n", caps); | |
240 | kfree(caps); | |
241 | } | |
242 | ||
243 | return ret; | |
244 | } | |
245 | ||
246 | HYPERVISOR_ATTR_RO(capabilities); | |
247 | ||
248 | static ssize_t changeset_show(struct hyp_sysfs_attr *attr, char *buffer) | |
249 | { | |
250 | int ret = -ENOMEM; | |
251 | char *cset; | |
252 | ||
253 | cset = kmalloc(XEN_CHANGESET_INFO_LEN, GFP_KERNEL); | |
254 | if (cset) { | |
255 | ret = HYPERVISOR_xen_version(XENVER_changeset, cset); | |
256 | if (!ret) | |
257 | ret = sprintf(buffer, "%s\n", cset); | |
258 | kfree(cset); | |
259 | } | |
260 | ||
261 | return ret; | |
262 | } | |
263 | ||
264 | HYPERVISOR_ATTR_RO(changeset); | |
265 | ||
266 | static ssize_t virtual_start_show(struct hyp_sysfs_attr *attr, char *buffer) | |
267 | { | |
268 | int ret = -ENOMEM; | |
269 | struct xen_platform_parameters *parms; | |
270 | ||
271 | parms = kmalloc(sizeof(struct xen_platform_parameters), GFP_KERNEL); | |
272 | if (parms) { | |
273 | ret = HYPERVISOR_xen_version(XENVER_platform_parameters, | |
274 | parms); | |
275 | if (!ret) | |
276 | ret = sprintf(buffer, "%lx\n", parms->virt_start); | |
277 | kfree(parms); | |
278 | } | |
279 | ||
280 | return ret; | |
281 | } | |
282 | ||
283 | HYPERVISOR_ATTR_RO(virtual_start); | |
284 | ||
285 | static ssize_t pagesize_show(struct hyp_sysfs_attr *attr, char *buffer) | |
286 | { | |
287 | int ret; | |
288 | ||
289 | ret = HYPERVISOR_xen_version(XENVER_pagesize, NULL); | |
290 | if (ret > 0) | |
291 | ret = sprintf(buffer, "%x\n", ret); | |
292 | ||
293 | return ret; | |
294 | } | |
295 | ||
296 | HYPERVISOR_ATTR_RO(pagesize); | |
297 | ||
cff7e81b JF |
298 | static ssize_t xen_feature_show(int index, char *buffer) |
299 | { | |
a649b720 JF |
300 | ssize_t ret; |
301 | struct xen_feature_info info; | |
cff7e81b | 302 | |
a649b720 JF |
303 | info.submap_idx = index; |
304 | ret = HYPERVISOR_xen_version(XENVER_get_features, &info); | |
305 | if (!ret) | |
306 | ret = sprintf(buffer, "%08x", info.submap); | |
cff7e81b JF |
307 | |
308 | return ret; | |
309 | } | |
310 | ||
a649b720 | 311 | static ssize_t features_show(struct hyp_sysfs_attr *attr, char *buffer) |
cff7e81b | 312 | { |
a649b720 JF |
313 | ssize_t len; |
314 | int i; | |
315 | ||
316 | len = 0; | |
317 | for (i = XENFEAT_NR_SUBMAPS-1; i >= 0; i--) { | |
318 | int ret = xen_feature_show(i, buffer + len); | |
319 | if (ret < 0) { | |
320 | if (len == 0) | |
321 | len = ret; | |
322 | break; | |
323 | } | |
324 | len += ret; | |
325 | } | |
326 | if (len > 0) | |
327 | buffer[len++] = '\n'; | |
328 | ||
329 | return len; | |
cff7e81b JF |
330 | } |
331 | ||
a649b720 | 332 | HYPERVISOR_ATTR_RO(features); |
cff7e81b JF |
333 | |
334 | static struct attribute *xen_properties_attrs[] = { | |
335 | &capabilities_attr.attr, | |
336 | &changeset_attr.attr, | |
337 | &virtual_start_attr.attr, | |
338 | &pagesize_attr.attr, | |
a649b720 | 339 | &features_attr.attr, |
cff7e81b JF |
340 | NULL |
341 | }; | |
342 | ||
ead1d014 | 343 | static const struct attribute_group xen_properties_group = { |
cff7e81b JF |
344 | .name = "properties", |
345 | .attrs = xen_properties_attrs, | |
346 | }; | |
347 | ||
348 | static int __init xen_properties_init(void) | |
349 | { | |
350 | return sysfs_create_group(hypervisor_kobj, &xen_properties_group); | |
351 | } | |
352 | ||
353 | static void xen_properties_destroy(void) | |
354 | { | |
355 | sysfs_remove_group(hypervisor_kobj, &xen_properties_group); | |
356 | } | |
357 | ||
cff7e81b JF |
358 | static int __init hyper_sysfs_init(void) |
359 | { | |
360 | int ret; | |
361 | ||
362 | if (!xen_domain()) | |
363 | return -ENODEV; | |
364 | ||
365 | ret = xen_sysfs_type_init(); | |
366 | if (ret) | |
367 | goto out; | |
368 | ret = xen_sysfs_version_init(); | |
369 | if (ret) | |
370 | goto version_out; | |
371 | ret = xen_compilation_init(); | |
372 | if (ret) | |
373 | goto comp_out; | |
374 | ret = xen_sysfs_uuid_init(); | |
375 | if (ret) | |
376 | goto uuid_out; | |
377 | ret = xen_properties_init(); | |
378 | if (ret) | |
379 | goto prop_out; | |
cff7e81b JF |
380 | |
381 | goto out; | |
382 | ||
cff7e81b JF |
383 | prop_out: |
384 | xen_sysfs_uuid_destroy(); | |
385 | uuid_out: | |
386 | xen_compilation_destroy(); | |
387 | comp_out: | |
388 | xen_sysfs_version_destroy(); | |
389 | version_out: | |
390 | xen_sysfs_type_destroy(); | |
391 | out: | |
392 | return ret; | |
393 | } | |
394 | ||
395 | static void __exit hyper_sysfs_exit(void) | |
396 | { | |
cff7e81b JF |
397 | xen_properties_destroy(); |
398 | xen_compilation_destroy(); | |
399 | xen_sysfs_uuid_destroy(); | |
400 | xen_sysfs_version_destroy(); | |
401 | xen_sysfs_type_destroy(); | |
402 | ||
403 | } | |
404 | module_init(hyper_sysfs_init); | |
405 | module_exit(hyper_sysfs_exit); | |
406 | ||
407 | static ssize_t hyp_sysfs_show(struct kobject *kobj, | |
408 | struct attribute *attr, | |
409 | char *buffer) | |
410 | { | |
411 | struct hyp_sysfs_attr *hyp_attr; | |
412 | hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr); | |
413 | if (hyp_attr->show) | |
414 | return hyp_attr->show(hyp_attr, buffer); | |
415 | return 0; | |
416 | } | |
417 | ||
418 | static ssize_t hyp_sysfs_store(struct kobject *kobj, | |
419 | struct attribute *attr, | |
420 | const char *buffer, | |
421 | size_t len) | |
422 | { | |
423 | struct hyp_sysfs_attr *hyp_attr; | |
424 | hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr); | |
425 | if (hyp_attr->store) | |
426 | return hyp_attr->store(hyp_attr, buffer, len); | |
427 | return 0; | |
428 | } | |
429 | ||
52cf25d0 | 430 | static const struct sysfs_ops hyp_sysfs_ops = { |
cff7e81b JF |
431 | .show = hyp_sysfs_show, |
432 | .store = hyp_sysfs_store, | |
433 | }; | |
434 | ||
435 | static struct kobj_type hyp_sysfs_kobj_type = { | |
436 | .sysfs_ops = &hyp_sysfs_ops, | |
437 | }; | |
438 | ||
439 | static int __init hypervisor_subsys_init(void) | |
440 | { | |
441 | if (!xen_domain()) | |
442 | return -ENODEV; | |
443 | ||
444 | hypervisor_kobj->ktype = &hyp_sysfs_kobj_type; | |
445 | return 0; | |
446 | } | |
447 | device_initcall(hypervisor_subsys_init); |