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