Root/
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/slab.h> |
11 | #include <linux/kernel.h> |
12 | #include <linux/module.h> |
13 | #include <linux/kobject.h> |
14 | #include <linux/err.h> |
15 | |
16 | #include <asm/xen/hypervisor.h> |
17 | #include <asm/xen/hypercall.h> |
18 | |
19 | #include <xen/xen.h> |
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 | |
101 | static const struct attribute_group version_group = { |
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 | |
118 | static ssize_t uuid_show_fallback(struct hyp_sysfs_attr *attr, char *buffer) |
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 | |
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 | |
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 | |
225 | static const struct attribute_group xen_compilation_group = { |
226 | .name = "compilation", |
227 | .attrs = xen_compile_attrs, |
228 | }; |
229 | |
230 | static int __init xen_compilation_init(void) |
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) |
288 | ret = sprintf(buffer, "%"PRI_xen_ulong"\n", |
289 | parms->virt_start); |
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 | |
311 | static ssize_t xen_feature_show(int index, char *buffer) |
312 | { |
313 | ssize_t ret; |
314 | struct xen_feature_info info; |
315 | |
316 | info.submap_idx = index; |
317 | ret = HYPERVISOR_xen_version(XENVER_get_features, &info); |
318 | if (!ret) |
319 | ret = sprintf(buffer, "%08x", info.submap); |
320 | |
321 | return ret; |
322 | } |
323 | |
324 | static ssize_t features_show(struct hyp_sysfs_attr *attr, char *buffer) |
325 | { |
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; |
343 | } |
344 | |
345 | HYPERVISOR_ATTR_RO(features); |
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, |
352 | &features_attr.attr, |
353 | NULL |
354 | }; |
355 | |
356 | static const struct attribute_group xen_properties_group = { |
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 | |
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; |
393 | |
394 | goto out; |
395 | |
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 | { |
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 | |
443 | static const struct sysfs_ops hyp_sysfs_ops = { |
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); |
461 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9