blob: 66a0a1475acf8c4b5f4cb276cc27e3d210bca39c [file] [log] [blame]
Jeremy Fitzhardingecff7e812009-03-10 14:39:59 -07001/*
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
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090010#include <linux/slab.h>
Jeremy Fitzhardingecff7e812009-03-10 14:39:59 -070011#include <linux/kernel.h>
12#include <linux/module.h>
13#include <linux/kobject.h>
Ian Campbell609b0b82012-10-17 09:39:09 +010014#include <linux/err.h>
Jeremy Fitzhardingecff7e812009-03-10 14:39:59 -070015
16#include <asm/xen/hypervisor.h>
17#include <asm/xen/hypercall.h>
18
Jeremy Fitzhardinge1ccbf532009-10-06 15:11:14 -070019#include <xen/xen.h>
Jeremy Fitzhardingecff7e812009-03-10 14:39:59 -070020#include <xen/xenbus.h>
21#include <xen/interface/xen.h>
22#include <xen/interface/version.h>
23
24#define HYPERVISOR_ATTR_RO(_name) \
25static struct hyp_sysfs_attr _name##_attr = __ATTR_RO(_name)
26
27#define HYPERVISOR_ATTR_RW(_name) \
28static struct hyp_sysfs_attr _name##_attr = \
29 __ATTR(_name, 0644, _name##_show, _name##_store)
30
31struct 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
38static ssize_t type_show(struct hyp_sysfs_attr *attr, char *buffer)
39{
40 return sprintf(buffer, "xen\n");
41}
42
43HYPERVISOR_ATTR_RO(type);
44
45static int __init xen_sysfs_type_init(void)
46{
47 return sysfs_create_file(hypervisor_kobj, &type_attr.attr);
48}
49
50static void xen_sysfs_type_destroy(void)
51{
52 sysfs_remove_file(hypervisor_kobj, &type_attr.attr);
53}
54
55/* xen version attributes */
56static 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
64HYPERVISOR_ATTR_RO(major);
65
66static 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
74HYPERVISOR_ATTR_RO(minor);
75
76static 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
92HYPERVISOR_ATTR_RO(extra);
93
94static struct attribute *version_attrs[] = {
95 &major_attr.attr,
96 &minor_attr.attr,
97 &extra_attr.attr,
98 NULL
99};
100
Jan Beulichead1d012012-03-14 12:34:19 -0400101static const struct attribute_group version_group = {
Jeremy Fitzhardingecff7e812009-03-10 14:39:59 -0700102 .name = "version",
103 .attrs = version_attrs,
104};
105
106static int __init xen_sysfs_version_init(void)
107{
108 return sysfs_create_group(hypervisor_kobj, &version_group);
109}
110
111static void xen_sysfs_version_destroy(void)
112{
113 sysfs_remove_group(hypervisor_kobj, &version_group);
114}
115
116/* UUID */
117
Daniel De Graaf5c13f802012-08-16 16:40:26 -0400118static ssize_t uuid_show_fallback(struct hyp_sysfs_attr *attr, char *buffer)
Jeremy Fitzhardingecff7e812009-03-10 14:39:59 -0700119{
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
Daniel De Graaf5c13f802012-08-16 16:40:26 -0400139static 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
Jeremy Fitzhardingecff7e812009-03-10 14:39:59 -0700150HYPERVISOR_ATTR_RO(uuid);
151
152static int __init xen_sysfs_uuid_init(void)
153{
154 return sysfs_create_file(hypervisor_kobj, &uuid_attr.attr);
155}
156
157static void xen_sysfs_uuid_destroy(void)
158{
159 sysfs_remove_file(hypervisor_kobj, &uuid_attr.attr);
160}
161
162/* xen compilation attributes */
163
164static 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
180HYPERVISOR_ATTR_RO(compiler);
181
182static 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
198HYPERVISOR_ATTR_RO(compiled_by);
199
200static 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
216HYPERVISOR_ATTR_RO(compile_date);
217
218static struct attribute *xen_compile_attrs[] = {
219 &compiler_attr.attr,
220 &compiled_by_attr.attr,
221 &compile_date_attr.attr,
222 NULL
223};
224
Jan Beulichead1d012012-03-14 12:34:19 -0400225static const struct attribute_group xen_compilation_group = {
Jeremy Fitzhardingecff7e812009-03-10 14:39:59 -0700226 .name = "compilation",
227 .attrs = xen_compile_attrs,
228};
229
Daniel Kiper887cb452011-05-04 20:19:49 +0200230static int __init xen_compilation_init(void)
Jeremy Fitzhardingecff7e812009-03-10 14:39:59 -0700231{
232 return sysfs_create_group(hypervisor_kobj, &xen_compilation_group);
233}
234
235static void xen_compilation_destroy(void)
236{
237 sysfs_remove_group(hypervisor_kobj, &xen_compilation_group);
238}
239
240/* xen properties info */
241
242static 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
258HYPERVISOR_ATTR_RO(capabilities);
259
260static 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
276HYPERVISOR_ATTR_RO(changeset);
277
278static 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, "%lx\n", parms->virt_start);
289 kfree(parms);
290 }
291
292 return ret;
293}
294
295HYPERVISOR_ATTR_RO(virtual_start);
296
297static ssize_t pagesize_show(struct hyp_sysfs_attr *attr, char *buffer)
298{
299 int ret;
300
301 ret = HYPERVISOR_xen_version(XENVER_pagesize, NULL);
302 if (ret > 0)
303 ret = sprintf(buffer, "%x\n", ret);
304
305 return ret;
306}
307
308HYPERVISOR_ATTR_RO(pagesize);
309
Jeremy Fitzhardingecff7e812009-03-10 14:39:59 -0700310static ssize_t xen_feature_show(int index, char *buffer)
311{
Jeremy Fitzhardingea649b722009-03-10 17:17:41 -0700312 ssize_t ret;
313 struct xen_feature_info info;
Jeremy Fitzhardingecff7e812009-03-10 14:39:59 -0700314
Jeremy Fitzhardingea649b722009-03-10 17:17:41 -0700315 info.submap_idx = index;
316 ret = HYPERVISOR_xen_version(XENVER_get_features, &info);
317 if (!ret)
318 ret = sprintf(buffer, "%08x", info.submap);
Jeremy Fitzhardingecff7e812009-03-10 14:39:59 -0700319
320 return ret;
321}
322
Jeremy Fitzhardingea649b722009-03-10 17:17:41 -0700323static ssize_t features_show(struct hyp_sysfs_attr *attr, char *buffer)
Jeremy Fitzhardingecff7e812009-03-10 14:39:59 -0700324{
Jeremy Fitzhardingea649b722009-03-10 17:17:41 -0700325 ssize_t len;
326 int i;
327
328 len = 0;
329 for (i = XENFEAT_NR_SUBMAPS-1; i >= 0; i--) {
330 int ret = xen_feature_show(i, buffer + len);
331 if (ret < 0) {
332 if (len == 0)
333 len = ret;
334 break;
335 }
336 len += ret;
337 }
338 if (len > 0)
339 buffer[len++] = '\n';
340
341 return len;
Jeremy Fitzhardingecff7e812009-03-10 14:39:59 -0700342}
343
Jeremy Fitzhardingea649b722009-03-10 17:17:41 -0700344HYPERVISOR_ATTR_RO(features);
Jeremy Fitzhardingecff7e812009-03-10 14:39:59 -0700345
346static struct attribute *xen_properties_attrs[] = {
347 &capabilities_attr.attr,
348 &changeset_attr.attr,
349 &virtual_start_attr.attr,
350 &pagesize_attr.attr,
Jeremy Fitzhardingea649b722009-03-10 17:17:41 -0700351 &features_attr.attr,
Jeremy Fitzhardingecff7e812009-03-10 14:39:59 -0700352 NULL
353};
354
Jan Beulichead1d012012-03-14 12:34:19 -0400355static const struct attribute_group xen_properties_group = {
Jeremy Fitzhardingecff7e812009-03-10 14:39:59 -0700356 .name = "properties",
357 .attrs = xen_properties_attrs,
358};
359
360static int __init xen_properties_init(void)
361{
362 return sysfs_create_group(hypervisor_kobj, &xen_properties_group);
363}
364
365static void xen_properties_destroy(void)
366{
367 sysfs_remove_group(hypervisor_kobj, &xen_properties_group);
368}
369
Jeremy Fitzhardingecff7e812009-03-10 14:39:59 -0700370static int __init hyper_sysfs_init(void)
371{
372 int ret;
373
374 if (!xen_domain())
375 return -ENODEV;
376
377 ret = xen_sysfs_type_init();
378 if (ret)
379 goto out;
380 ret = xen_sysfs_version_init();
381 if (ret)
382 goto version_out;
383 ret = xen_compilation_init();
384 if (ret)
385 goto comp_out;
386 ret = xen_sysfs_uuid_init();
387 if (ret)
388 goto uuid_out;
389 ret = xen_properties_init();
390 if (ret)
391 goto prop_out;
Jeremy Fitzhardingecff7e812009-03-10 14:39:59 -0700392
393 goto out;
394
Jeremy Fitzhardingecff7e812009-03-10 14:39:59 -0700395prop_out:
396 xen_sysfs_uuid_destroy();
397uuid_out:
398 xen_compilation_destroy();
399comp_out:
400 xen_sysfs_version_destroy();
401version_out:
402 xen_sysfs_type_destroy();
403out:
404 return ret;
405}
406
407static void __exit hyper_sysfs_exit(void)
408{
Jeremy Fitzhardingecff7e812009-03-10 14:39:59 -0700409 xen_properties_destroy();
410 xen_compilation_destroy();
411 xen_sysfs_uuid_destroy();
412 xen_sysfs_version_destroy();
413 xen_sysfs_type_destroy();
414
415}
416module_init(hyper_sysfs_init);
417module_exit(hyper_sysfs_exit);
418
419static ssize_t hyp_sysfs_show(struct kobject *kobj,
420 struct attribute *attr,
421 char *buffer)
422{
423 struct hyp_sysfs_attr *hyp_attr;
424 hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr);
425 if (hyp_attr->show)
426 return hyp_attr->show(hyp_attr, buffer);
427 return 0;
428}
429
430static ssize_t hyp_sysfs_store(struct kobject *kobj,
431 struct attribute *attr,
432 const char *buffer,
433 size_t len)
434{
435 struct hyp_sysfs_attr *hyp_attr;
436 hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr);
437 if (hyp_attr->store)
438 return hyp_attr->store(hyp_attr, buffer, len);
439 return 0;
440}
441
Emese Revfy52cf25d2010-01-19 02:58:23 +0100442static const struct sysfs_ops hyp_sysfs_ops = {
Jeremy Fitzhardingecff7e812009-03-10 14:39:59 -0700443 .show = hyp_sysfs_show,
444 .store = hyp_sysfs_store,
445};
446
447static struct kobj_type hyp_sysfs_kobj_type = {
448 .sysfs_ops = &hyp_sysfs_ops,
449};
450
451static int __init hypervisor_subsys_init(void)
452{
453 if (!xen_domain())
454 return -ENODEV;
455
456 hypervisor_kobj->ktype = &hyp_sysfs_kobj_type;
457 return 0;
458}
459device_initcall(hypervisor_subsys_init);