diff options
Diffstat (limited to 'drivers/xen/sys-hypervisor.c')
-rw-r--r-- | drivers/xen/sys-hypervisor.c | 475 |
1 files changed, 475 insertions, 0 deletions
diff --git a/drivers/xen/sys-hypervisor.c b/drivers/xen/sys-hypervisor.c new file mode 100644 index 000000000000..cb29d1ccf0d9 --- /dev/null +++ b/drivers/xen/sys-hypervisor.c | |||
@@ -0,0 +1,475 @@ | |||
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 | |||
296 | /* eventually there will be several more features to export */ | ||
297 | static ssize_t xen_feature_show(int index, char *buffer) | ||
298 | { | ||
299 | int ret = -ENOMEM; | ||
300 | struct xen_feature_info *info; | ||
301 | |||
302 | info = kmalloc(sizeof(struct xen_feature_info), GFP_KERNEL); | ||
303 | if (info) { | ||
304 | info->submap_idx = index; | ||
305 | ret = HYPERVISOR_xen_version(XENVER_get_features, info); | ||
306 | if (!ret) | ||
307 | ret = sprintf(buffer, "%d\n", info->submap); | ||
308 | kfree(info); | ||
309 | } | ||
310 | |||
311 | return ret; | ||
312 | } | ||
313 | |||
314 | static ssize_t writable_pt_show(struct hyp_sysfs_attr *attr, char *buffer) | ||
315 | { | ||
316 | return xen_feature_show(XENFEAT_writable_page_tables, buffer); | ||
317 | } | ||
318 | |||
319 | HYPERVISOR_ATTR_RO(writable_pt); | ||
320 | |||
321 | static struct attribute *xen_properties_attrs[] = { | ||
322 | &capabilities_attr.attr, | ||
323 | &changeset_attr.attr, | ||
324 | &virtual_start_attr.attr, | ||
325 | &pagesize_attr.attr, | ||
326 | &writable_pt_attr.attr, | ||
327 | NULL | ||
328 | }; | ||
329 | |||
330 | static struct attribute_group xen_properties_group = { | ||
331 | .name = "properties", | ||
332 | .attrs = xen_properties_attrs, | ||
333 | }; | ||
334 | |||
335 | static int __init xen_properties_init(void) | ||
336 | { | ||
337 | return sysfs_create_group(hypervisor_kobj, &xen_properties_group); | ||
338 | } | ||
339 | |||
340 | static void xen_properties_destroy(void) | ||
341 | { | ||
342 | sysfs_remove_group(hypervisor_kobj, &xen_properties_group); | ||
343 | } | ||
344 | |||
345 | #ifdef CONFIG_KEXEC | ||
346 | |||
347 | extern size_t vmcoreinfo_size_xen; | ||
348 | extern unsigned long paddr_vmcoreinfo_xen; | ||
349 | |||
350 | static ssize_t vmcoreinfo_show(struct hyp_sysfs_attr *attr, char *page) | ||
351 | { | ||
352 | return sprintf(page, "%lx %zx\n", | ||
353 | paddr_vmcoreinfo_xen, vmcoreinfo_size_xen); | ||
354 | } | ||
355 | |||
356 | HYPERVISOR_ATTR_RO(vmcoreinfo); | ||
357 | |||
358 | static int __init xen_sysfs_vmcoreinfo_init(void) | ||
359 | { | ||
360 | return sysfs_create_file(hypervisor_kobj, | ||
361 | &vmcoreinfo_attr.attr); | ||
362 | } | ||
363 | |||
364 | static void xen_sysfs_vmcoreinfo_destroy(void) | ||
365 | { | ||
366 | sysfs_remove_file(hypervisor_kobj, &vmcoreinfo_attr.attr); | ||
367 | } | ||
368 | |||
369 | #endif | ||
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 | #ifdef CONFIG_KEXEC | ||
394 | if (vmcoreinfo_size_xen != 0) { | ||
395 | ret = xen_sysfs_vmcoreinfo_init(); | ||
396 | if (ret) | ||
397 | goto vmcoreinfo_out; | ||
398 | } | ||
399 | #endif | ||
400 | |||
401 | goto out; | ||
402 | |||
403 | #ifdef CONFIG_KEXEC | ||
404 | vmcoreinfo_out: | ||
405 | #endif | ||
406 | xen_properties_destroy(); | ||
407 | prop_out: | ||
408 | xen_sysfs_uuid_destroy(); | ||
409 | uuid_out: | ||
410 | xen_compilation_destroy(); | ||
411 | comp_out: | ||
412 | xen_sysfs_version_destroy(); | ||
413 | version_out: | ||
414 | xen_sysfs_type_destroy(); | ||
415 | out: | ||
416 | return ret; | ||
417 | } | ||
418 | |||
419 | static void __exit hyper_sysfs_exit(void) | ||
420 | { | ||
421 | #ifdef CONFIG_KEXEC | ||
422 | if (vmcoreinfo_size_xen != 0) | ||
423 | xen_sysfs_vmcoreinfo_destroy(); | ||
424 | #endif | ||
425 | xen_properties_destroy(); | ||
426 | xen_compilation_destroy(); | ||
427 | xen_sysfs_uuid_destroy(); | ||
428 | xen_sysfs_version_destroy(); | ||
429 | xen_sysfs_type_destroy(); | ||
430 | |||
431 | } | ||
432 | module_init(hyper_sysfs_init); | ||
433 | module_exit(hyper_sysfs_exit); | ||
434 | |||
435 | static ssize_t hyp_sysfs_show(struct kobject *kobj, | ||
436 | struct attribute *attr, | ||
437 | char *buffer) | ||
438 | { | ||
439 | struct hyp_sysfs_attr *hyp_attr; | ||
440 | hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr); | ||
441 | if (hyp_attr->show) | ||
442 | return hyp_attr->show(hyp_attr, buffer); | ||
443 | return 0; | ||
444 | } | ||
445 | |||
446 | static ssize_t hyp_sysfs_store(struct kobject *kobj, | ||
447 | struct attribute *attr, | ||
448 | const char *buffer, | ||
449 | size_t len) | ||
450 | { | ||
451 | struct hyp_sysfs_attr *hyp_attr; | ||
452 | hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr); | ||
453 | if (hyp_attr->store) | ||
454 | return hyp_attr->store(hyp_attr, buffer, len); | ||
455 | return 0; | ||
456 | } | ||
457 | |||
458 | static struct sysfs_ops hyp_sysfs_ops = { | ||
459 | .show = hyp_sysfs_show, | ||
460 | .store = hyp_sysfs_store, | ||
461 | }; | ||
462 | |||
463 | static struct kobj_type hyp_sysfs_kobj_type = { | ||
464 | .sysfs_ops = &hyp_sysfs_ops, | ||
465 | }; | ||
466 | |||
467 | static int __init hypervisor_subsys_init(void) | ||
468 | { | ||
469 | if (!xen_domain()) | ||
470 | return -ENODEV; | ||
471 | |||
472 | hypervisor_kobj->ktype = &hyp_sysfs_kobj_type; | ||
473 | return 0; | ||
474 | } | ||
475 | device_initcall(hypervisor_subsys_init); | ||