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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 | ||
10 | #include <linux/kernel.h> | |
11 | #include <linux/module.h> | |
12 | #include <linux/kobject.h> | |
13 | ||
14 | #include <asm/xen/hypervisor.h> | |
15 | #include <asm/xen/hypercall.h> | |
16 | ||
1ccbf534 | 17 | #include <xen/xen.h> |
cff7e81b JF |
18 | #include <xen/xenbus.h> |
19 | #include <xen/interface/xen.h> | |
20 | #include <xen/interface/version.h> | |
21 | ||
22 | #define HYPERVISOR_ATTR_RO(_name) \ | |
23 | static struct hyp_sysfs_attr _name##_attr = __ATTR_RO(_name) | |
24 | ||
25 | #define HYPERVISOR_ATTR_RW(_name) \ | |
26 | static struct hyp_sysfs_attr _name##_attr = \ | |
27 | __ATTR(_name, 0644, _name##_show, _name##_store) | |
28 | ||
29 | struct hyp_sysfs_attr { | |
30 | struct attribute attr; | |
31 | ssize_t (*show)(struct hyp_sysfs_attr *, char *); | |
32 | ssize_t (*store)(struct hyp_sysfs_attr *, const char *, size_t); | |
33 | void *hyp_attr_data; | |
34 | }; | |
35 | ||
36 | static ssize_t type_show(struct hyp_sysfs_attr *attr, char *buffer) | |
37 | { | |
38 | return sprintf(buffer, "xen\n"); | |
39 | } | |
40 | ||
41 | HYPERVISOR_ATTR_RO(type); | |
42 | ||
43 | static int __init xen_sysfs_type_init(void) | |
44 | { | |
45 | return sysfs_create_file(hypervisor_kobj, &type_attr.attr); | |
46 | } | |
47 | ||
48 | static void xen_sysfs_type_destroy(void) | |
49 | { | |
50 | sysfs_remove_file(hypervisor_kobj, &type_attr.attr); | |
51 | } | |
52 | ||
53 | /* xen version attributes */ | |
54 | static ssize_t major_show(struct hyp_sysfs_attr *attr, char *buffer) | |
55 | { | |
56 | int version = HYPERVISOR_xen_version(XENVER_version, NULL); | |
57 | if (version) | |
58 | return sprintf(buffer, "%d\n", version >> 16); | |
59 | return -ENODEV; | |
60 | } | |
61 | ||
62 | HYPERVISOR_ATTR_RO(major); | |
63 | ||
64 | static ssize_t minor_show(struct hyp_sysfs_attr *attr, char *buffer) | |
65 | { | |
66 | int version = HYPERVISOR_xen_version(XENVER_version, NULL); | |
67 | if (version) | |
68 | return sprintf(buffer, "%d\n", version & 0xff); | |
69 | return -ENODEV; | |
70 | } | |
71 | ||
72 | HYPERVISOR_ATTR_RO(minor); | |
73 | ||
74 | static ssize_t extra_show(struct hyp_sysfs_attr *attr, char *buffer) | |
75 | { | |
76 | int ret = -ENOMEM; | |
77 | char *extra; | |
78 | ||
79 | extra = kmalloc(XEN_EXTRAVERSION_LEN, GFP_KERNEL); | |
80 | if (extra) { | |
81 | ret = HYPERVISOR_xen_version(XENVER_extraversion, extra); | |
82 | if (!ret) | |
83 | ret = sprintf(buffer, "%s\n", extra); | |
84 | kfree(extra); | |
85 | } | |
86 | ||
87 | return ret; | |
88 | } | |
89 | ||
90 | HYPERVISOR_ATTR_RO(extra); | |
91 | ||
92 | static struct attribute *version_attrs[] = { | |
93 | &major_attr.attr, | |
94 | &minor_attr.attr, | |
95 | &extra_attr.attr, | |
96 | NULL | |
97 | }; | |
98 | ||
99 | static struct attribute_group version_group = { | |
100 | .name = "version", | |
101 | .attrs = version_attrs, | |
102 | }; | |
103 | ||
104 | static int __init xen_sysfs_version_init(void) | |
105 | { | |
106 | return sysfs_create_group(hypervisor_kobj, &version_group); | |
107 | } | |
108 | ||
109 | static void xen_sysfs_version_destroy(void) | |
110 | { | |
111 | sysfs_remove_group(hypervisor_kobj, &version_group); | |
112 | } | |
113 | ||
114 | /* UUID */ | |
115 | ||
116 | static ssize_t uuid_show(struct hyp_sysfs_attr *attr, char *buffer) | |
117 | { | |
118 | char *vm, *val; | |
119 | int ret; | |
120 | extern int xenstored_ready; | |
121 | ||
122 | if (!xenstored_ready) | |
123 | return -EBUSY; | |
124 | ||
125 | vm = xenbus_read(XBT_NIL, "vm", "", NULL); | |
126 | if (IS_ERR(vm)) | |
127 | return PTR_ERR(vm); | |
128 | val = xenbus_read(XBT_NIL, vm, "uuid", NULL); | |
129 | kfree(vm); | |
130 | if (IS_ERR(val)) | |
131 | return PTR_ERR(val); | |
132 | ret = sprintf(buffer, "%s\n", val); | |
133 | kfree(val); | |
134 | return ret; | |
135 | } | |
136 | ||
137 | HYPERVISOR_ATTR_RO(uuid); | |
138 | ||
139 | static int __init xen_sysfs_uuid_init(void) | |
140 | { | |
141 | return sysfs_create_file(hypervisor_kobj, &uuid_attr.attr); | |
142 | } | |
143 | ||
144 | static void xen_sysfs_uuid_destroy(void) | |
145 | { | |
146 | sysfs_remove_file(hypervisor_kobj, &uuid_attr.attr); | |
147 | } | |
148 | ||
149 | /* xen compilation attributes */ | |
150 | ||
151 | static ssize_t compiler_show(struct hyp_sysfs_attr *attr, char *buffer) | |
152 | { | |
153 | int ret = -ENOMEM; | |
154 | struct xen_compile_info *info; | |
155 | ||
156 | info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL); | |
157 | if (info) { | |
158 | ret = HYPERVISOR_xen_version(XENVER_compile_info, info); | |
159 | if (!ret) | |
160 | ret = sprintf(buffer, "%s\n", info->compiler); | |
161 | kfree(info); | |
162 | } | |
163 | ||
164 | return ret; | |
165 | } | |
166 | ||
167 | HYPERVISOR_ATTR_RO(compiler); | |
168 | ||
169 | static ssize_t compiled_by_show(struct hyp_sysfs_attr *attr, char *buffer) | |
170 | { | |
171 | int ret = -ENOMEM; | |
172 | struct xen_compile_info *info; | |
173 | ||
174 | info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL); | |
175 | if (info) { | |
176 | ret = HYPERVISOR_xen_version(XENVER_compile_info, info); | |
177 | if (!ret) | |
178 | ret = sprintf(buffer, "%s\n", info->compile_by); | |
179 | kfree(info); | |
180 | } | |
181 | ||
182 | return ret; | |
183 | } | |
184 | ||
185 | HYPERVISOR_ATTR_RO(compiled_by); | |
186 | ||
187 | static ssize_t compile_date_show(struct hyp_sysfs_attr *attr, char *buffer) | |
188 | { | |
189 | int ret = -ENOMEM; | |
190 | struct xen_compile_info *info; | |
191 | ||
192 | info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL); | |
193 | if (info) { | |
194 | ret = HYPERVISOR_xen_version(XENVER_compile_info, info); | |
195 | if (!ret) | |
196 | ret = sprintf(buffer, "%s\n", info->compile_date); | |
197 | kfree(info); | |
198 | } | |
199 | ||
200 | return ret; | |
201 | } | |
202 | ||
203 | HYPERVISOR_ATTR_RO(compile_date); | |
204 | ||
205 | static struct attribute *xen_compile_attrs[] = { | |
206 | &compiler_attr.attr, | |
207 | &compiled_by_attr.attr, | |
208 | &compile_date_attr.attr, | |
209 | NULL | |
210 | }; | |
211 | ||
212 | static struct attribute_group xen_compilation_group = { | |
213 | .name = "compilation", | |
214 | .attrs = xen_compile_attrs, | |
215 | }; | |
216 | ||
217 | int __init static xen_compilation_init(void) | |
218 | { | |
219 | return sysfs_create_group(hypervisor_kobj, &xen_compilation_group); | |
220 | } | |
221 | ||
222 | static void xen_compilation_destroy(void) | |
223 | { | |
224 | sysfs_remove_group(hypervisor_kobj, &xen_compilation_group); | |
225 | } | |
226 | ||
227 | /* xen properties info */ | |
228 | ||
229 | static ssize_t capabilities_show(struct hyp_sysfs_attr *attr, char *buffer) | |
230 | { | |
231 | int ret = -ENOMEM; | |
232 | char *caps; | |
233 | ||
234 | caps = kmalloc(XEN_CAPABILITIES_INFO_LEN, GFP_KERNEL); | |
235 | if (caps) { | |
236 | ret = HYPERVISOR_xen_version(XENVER_capabilities, caps); | |
237 | if (!ret) | |
238 | ret = sprintf(buffer, "%s\n", caps); | |
239 | kfree(caps); | |
240 | } | |
241 | ||
242 | return ret; | |
243 | } | |
244 | ||
245 | HYPERVISOR_ATTR_RO(capabilities); | |
246 | ||
247 | static ssize_t changeset_show(struct hyp_sysfs_attr *attr, char *buffer) | |
248 | { | |
249 | int ret = -ENOMEM; | |
250 | char *cset; | |
251 | ||
252 | cset = kmalloc(XEN_CHANGESET_INFO_LEN, GFP_KERNEL); | |
253 | if (cset) { | |
254 | ret = HYPERVISOR_xen_version(XENVER_changeset, cset); | |
255 | if (!ret) | |
256 | ret = sprintf(buffer, "%s\n", cset); | |
257 | kfree(cset); | |
258 | } | |
259 | ||
260 | return ret; | |
261 | } | |
262 | ||
263 | HYPERVISOR_ATTR_RO(changeset); | |
264 | ||
265 | static ssize_t virtual_start_show(struct hyp_sysfs_attr *attr, char *buffer) | |
266 | { | |
267 | int ret = -ENOMEM; | |
268 | struct xen_platform_parameters *parms; | |
269 | ||
270 | parms = kmalloc(sizeof(struct xen_platform_parameters), GFP_KERNEL); | |
271 | if (parms) { | |
272 | ret = HYPERVISOR_xen_version(XENVER_platform_parameters, | |
273 | parms); | |
274 | if (!ret) | |
275 | ret = sprintf(buffer, "%lx\n", parms->virt_start); | |
276 | kfree(parms); | |
277 | } | |
278 | ||
279 | return ret; | |
280 | } | |
281 | ||
282 | HYPERVISOR_ATTR_RO(virtual_start); | |
283 | ||
284 | static ssize_t pagesize_show(struct hyp_sysfs_attr *attr, char *buffer) | |
285 | { | |
286 | int ret; | |
287 | ||
288 | ret = HYPERVISOR_xen_version(XENVER_pagesize, NULL); | |
289 | if (ret > 0) | |
290 | ret = sprintf(buffer, "%x\n", ret); | |
291 | ||
292 | return ret; | |
293 | } | |
294 | ||
295 | HYPERVISOR_ATTR_RO(pagesize); | |
296 | ||
cff7e81b JF |
297 | static ssize_t xen_feature_show(int index, char *buffer) |
298 | { | |
a649b720 JF |
299 | ssize_t ret; |
300 | struct xen_feature_info info; | |
cff7e81b | 301 | |
a649b720 JF |
302 | info.submap_idx = index; |
303 | ret = HYPERVISOR_xen_version(XENVER_get_features, &info); | |
304 | if (!ret) | |
305 | ret = sprintf(buffer, "%08x", info.submap); | |
cff7e81b JF |
306 | |
307 | return ret; | |
308 | } | |
309 | ||
a649b720 | 310 | static ssize_t features_show(struct hyp_sysfs_attr *attr, char *buffer) |
cff7e81b | 311 | { |
a649b720 JF |
312 | ssize_t len; |
313 | int i; | |
314 | ||
315 | len = 0; | |
316 | for (i = XENFEAT_NR_SUBMAPS-1; i >= 0; i--) { | |
317 | int ret = xen_feature_show(i, buffer + len); | |
318 | if (ret < 0) { | |
319 | if (len == 0) | |
320 | len = ret; | |
321 | break; | |
322 | } | |
323 | len += ret; | |
324 | } | |
325 | if (len > 0) | |
326 | buffer[len++] = '\n'; | |
327 | ||
328 | return len; | |
cff7e81b JF |
329 | } |
330 | ||
a649b720 | 331 | HYPERVISOR_ATTR_RO(features); |
cff7e81b JF |
332 | |
333 | static struct attribute *xen_properties_attrs[] = { | |
334 | &capabilities_attr.attr, | |
335 | &changeset_attr.attr, | |
336 | &virtual_start_attr.attr, | |
337 | &pagesize_attr.attr, | |
a649b720 | 338 | &features_attr.attr, |
cff7e81b JF |
339 | NULL |
340 | }; | |
341 | ||
342 | static struct attribute_group xen_properties_group = { | |
343 | .name = "properties", | |
344 | .attrs = xen_properties_attrs, | |
345 | }; | |
346 | ||
347 | static int __init xen_properties_init(void) | |
348 | { | |
349 | return sysfs_create_group(hypervisor_kobj, &xen_properties_group); | |
350 | } | |
351 | ||
352 | static void xen_properties_destroy(void) | |
353 | { | |
354 | sysfs_remove_group(hypervisor_kobj, &xen_properties_group); | |
355 | } | |
356 | ||
cff7e81b JF |
357 | static int __init hyper_sysfs_init(void) |
358 | { | |
359 | int ret; | |
360 | ||
361 | if (!xen_domain()) | |
362 | return -ENODEV; | |
363 | ||
364 | ret = xen_sysfs_type_init(); | |
365 | if (ret) | |
366 | goto out; | |
367 | ret = xen_sysfs_version_init(); | |
368 | if (ret) | |
369 | goto version_out; | |
370 | ret = xen_compilation_init(); | |
371 | if (ret) | |
372 | goto comp_out; | |
373 | ret = xen_sysfs_uuid_init(); | |
374 | if (ret) | |
375 | goto uuid_out; | |
376 | ret = xen_properties_init(); | |
377 | if (ret) | |
378 | goto prop_out; | |
cff7e81b JF |
379 | |
380 | goto out; | |
381 | ||
cff7e81b JF |
382 | prop_out: |
383 | xen_sysfs_uuid_destroy(); | |
384 | uuid_out: | |
385 | xen_compilation_destroy(); | |
386 | comp_out: | |
387 | xen_sysfs_version_destroy(); | |
388 | version_out: | |
389 | xen_sysfs_type_destroy(); | |
390 | out: | |
391 | return ret; | |
392 | } | |
393 | ||
394 | static void __exit hyper_sysfs_exit(void) | |
395 | { | |
cff7e81b JF |
396 | xen_properties_destroy(); |
397 | xen_compilation_destroy(); | |
398 | xen_sysfs_uuid_destroy(); | |
399 | xen_sysfs_version_destroy(); | |
400 | xen_sysfs_type_destroy(); | |
401 | ||
402 | } | |
403 | module_init(hyper_sysfs_init); | |
404 | module_exit(hyper_sysfs_exit); | |
405 | ||
406 | static ssize_t hyp_sysfs_show(struct kobject *kobj, | |
407 | struct attribute *attr, | |
408 | char *buffer) | |
409 | { | |
410 | struct hyp_sysfs_attr *hyp_attr; | |
411 | hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr); | |
412 | if (hyp_attr->show) | |
413 | return hyp_attr->show(hyp_attr, buffer); | |
414 | return 0; | |
415 | } | |
416 | ||
417 | static ssize_t hyp_sysfs_store(struct kobject *kobj, | |
418 | struct attribute *attr, | |
419 | const char *buffer, | |
420 | size_t len) | |
421 | { | |
422 | struct hyp_sysfs_attr *hyp_attr; | |
423 | hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr); | |
424 | if (hyp_attr->store) | |
425 | return hyp_attr->store(hyp_attr, buffer, len); | |
426 | return 0; | |
427 | } | |
428 | ||
429 | static struct sysfs_ops hyp_sysfs_ops = { | |
430 | .show = hyp_sysfs_show, | |
431 | .store = hyp_sysfs_store, | |
432 | }; | |
433 | ||
434 | static struct kobj_type hyp_sysfs_kobj_type = { | |
435 | .sysfs_ops = &hyp_sysfs_ops, | |
436 | }; | |
437 | ||
438 | static int __init hypervisor_subsys_init(void) | |
439 | { | |
440 | if (!xen_domain()) | |
441 | return -ENODEV; | |
442 | ||
443 | hypervisor_kobj->ktype = &hyp_sysfs_kobj_type; | |
444 | return 0; | |
445 | } | |
446 | device_initcall(hypervisor_subsys_init); |