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10#include <linux/slab.h>
11#include <linux/kernel.h>
12#include <linux/module.h>
13#include <linux/kobject.h>
14
15#include <asm/xen/hypervisor.h>
16#include <asm/xen/hypercall.h>
17
18#include <xen/xen.h>
19#include <xen/xenbus.h>
20#include <xen/interface/xen.h>
21#include <xen/interface/version.h>
22
23#define HYPERVISOR_ATTR_RO(_name) \
24static struct hyp_sysfs_attr _name##_attr = __ATTR_RO(_name)
25
26#define HYPERVISOR_ATTR_RW(_name) \
27static struct hyp_sysfs_attr _name##_attr = \
28 __ATTR(_name, 0644, _name##_show, _name##_store)
29
30struct hyp_sysfs_attr {
31 struct attribute attr;
32 ssize_t (*show)(struct hyp_sysfs_attr *, char *);
33 ssize_t (*store)(struct hyp_sysfs_attr *, const char *, size_t);
34 void *hyp_attr_data;
35};
36
37static ssize_t type_show(struct hyp_sysfs_attr *attr, char *buffer)
38{
39 return sprintf(buffer, "xen\n");
40}
41
42HYPERVISOR_ATTR_RO(type);
43
44static int __init xen_sysfs_type_init(void)
45{
46 return sysfs_create_file(hypervisor_kobj, &type_attr.attr);
47}
48
49static void xen_sysfs_type_destroy(void)
50{
51 sysfs_remove_file(hypervisor_kobj, &type_attr.attr);
52}
53
54
55static ssize_t major_show(struct hyp_sysfs_attr *attr, char *buffer)
56{
57 int version = HYPERVISOR_xen_version(XENVER_version, NULL);
58 if (version)
59 return sprintf(buffer, "%d\n", version >> 16);
60 return -ENODEV;
61}
62
63HYPERVISOR_ATTR_RO(major);
64
65static ssize_t minor_show(struct hyp_sysfs_attr *attr, char *buffer)
66{
67 int version = HYPERVISOR_xen_version(XENVER_version, NULL);
68 if (version)
69 return sprintf(buffer, "%d\n", version & 0xff);
70 return -ENODEV;
71}
72
73HYPERVISOR_ATTR_RO(minor);
74
75static ssize_t extra_show(struct hyp_sysfs_attr *attr, char *buffer)
76{
77 int ret = -ENOMEM;
78 char *extra;
79
80 extra = kmalloc(XEN_EXTRAVERSION_LEN, GFP_KERNEL);
81 if (extra) {
82 ret = HYPERVISOR_xen_version(XENVER_extraversion, extra);
83 if (!ret)
84 ret = sprintf(buffer, "%s\n", extra);
85 kfree(extra);
86 }
87
88 return ret;
89}
90
91HYPERVISOR_ATTR_RO(extra);
92
93static struct attribute *version_attrs[] = {
94 &major_attr.attr,
95 &minor_attr.attr,
96 &extra_attr.attr,
97 NULL
98};
99
100static struct attribute_group version_group = {
101 .name = "version",
102 .attrs = version_attrs,
103};
104
105static int __init xen_sysfs_version_init(void)
106{
107 return sysfs_create_group(hypervisor_kobj, &version_group);
108}
109
110static void xen_sysfs_version_destroy(void)
111{
112 sysfs_remove_group(hypervisor_kobj, &version_group);
113}
114
115
116
117static ssize_t uuid_show(struct hyp_sysfs_attr *attr, char *buffer)
118{
119 char *vm, *val;
120 int ret;
121 extern int xenstored_ready;
122
123 if (!xenstored_ready)
124 return -EBUSY;
125
126 vm = xenbus_read(XBT_NIL, "vm", "", NULL);
127 if (IS_ERR(vm))
128 return PTR_ERR(vm);
129 val = xenbus_read(XBT_NIL, vm, "uuid", NULL);
130 kfree(vm);
131 if (IS_ERR(val))
132 return PTR_ERR(val);
133 ret = sprintf(buffer, "%s\n", val);
134 kfree(val);
135 return ret;
136}
137
138HYPERVISOR_ATTR_RO(uuid);
139
140static int __init xen_sysfs_uuid_init(void)
141{
142 return sysfs_create_file(hypervisor_kobj, &uuid_attr.attr);
143}
144
145static void xen_sysfs_uuid_destroy(void)
146{
147 sysfs_remove_file(hypervisor_kobj, &uuid_attr.attr);
148}
149
150
151
152static ssize_t compiler_show(struct hyp_sysfs_attr *attr, char *buffer)
153{
154 int ret = -ENOMEM;
155 struct xen_compile_info *info;
156
157 info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL);
158 if (info) {
159 ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
160 if (!ret)
161 ret = sprintf(buffer, "%s\n", info->compiler);
162 kfree(info);
163 }
164
165 return ret;
166}
167
168HYPERVISOR_ATTR_RO(compiler);
169
170static ssize_t compiled_by_show(struct hyp_sysfs_attr *attr, char *buffer)
171{
172 int ret = -ENOMEM;
173 struct xen_compile_info *info;
174
175 info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL);
176 if (info) {
177 ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
178 if (!ret)
179 ret = sprintf(buffer, "%s\n", info->compile_by);
180 kfree(info);
181 }
182
183 return ret;
184}
185
186HYPERVISOR_ATTR_RO(compiled_by);
187
188static ssize_t compile_date_show(struct hyp_sysfs_attr *attr, char *buffer)
189{
190 int ret = -ENOMEM;
191 struct xen_compile_info *info;
192
193 info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL);
194 if (info) {
195 ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
196 if (!ret)
197 ret = sprintf(buffer, "%s\n", info->compile_date);
198 kfree(info);
199 }
200
201 return ret;
202}
203
204HYPERVISOR_ATTR_RO(compile_date);
205
206static struct attribute *xen_compile_attrs[] = {
207 &compiler_attr.attr,
208 &compiled_by_attr.attr,
209 &compile_date_attr.attr,
210 NULL
211};
212
213static struct attribute_group xen_compilation_group = {
214 .name = "compilation",
215 .attrs = xen_compile_attrs,
216};
217
218static int __init xen_compilation_init(void)
219{
220 return sysfs_create_group(hypervisor_kobj, &xen_compilation_group);
221}
222
223static void xen_compilation_destroy(void)
224{
225 sysfs_remove_group(hypervisor_kobj, &xen_compilation_group);
226}
227
228
229
230static ssize_t capabilities_show(struct hyp_sysfs_attr *attr, char *buffer)
231{
232 int ret = -ENOMEM;
233 char *caps;
234
235 caps = kmalloc(XEN_CAPABILITIES_INFO_LEN, GFP_KERNEL);
236 if (caps) {
237 ret = HYPERVISOR_xen_version(XENVER_capabilities, caps);
238 if (!ret)
239 ret = sprintf(buffer, "%s\n", caps);
240 kfree(caps);
241 }
242
243 return ret;
244}
245
246HYPERVISOR_ATTR_RO(capabilities);
247
248static ssize_t changeset_show(struct hyp_sysfs_attr *attr, char *buffer)
249{
250 int ret = -ENOMEM;
251 char *cset;
252
253 cset = kmalloc(XEN_CHANGESET_INFO_LEN, GFP_KERNEL);
254 if (cset) {
255 ret = HYPERVISOR_xen_version(XENVER_changeset, cset);
256 if (!ret)
257 ret = sprintf(buffer, "%s\n", cset);
258 kfree(cset);
259 }
260
261 return ret;
262}
263
264HYPERVISOR_ATTR_RO(changeset);
265
266static ssize_t virtual_start_show(struct hyp_sysfs_attr *attr, char *buffer)
267{
268 int ret = -ENOMEM;
269 struct xen_platform_parameters *parms;
270
271 parms = kmalloc(sizeof(struct xen_platform_parameters), GFP_KERNEL);
272 if (parms) {
273 ret = HYPERVISOR_xen_version(XENVER_platform_parameters,
274 parms);
275 if (!ret)
276 ret = sprintf(buffer, "%lx\n", parms->virt_start);
277 kfree(parms);
278 }
279
280 return ret;
281}
282
283HYPERVISOR_ATTR_RO(virtual_start);
284
285static ssize_t pagesize_show(struct hyp_sysfs_attr *attr, char *buffer)
286{
287 int ret;
288
289 ret = HYPERVISOR_xen_version(XENVER_pagesize, NULL);
290 if (ret > 0)
291 ret = sprintf(buffer, "%x\n", ret);
292
293 return ret;
294}
295
296HYPERVISOR_ATTR_RO(pagesize);
297
298static ssize_t xen_feature_show(int index, char *buffer)
299{
300 ssize_t ret;
301 struct xen_feature_info info;
302
303 info.submap_idx = index;
304 ret = HYPERVISOR_xen_version(XENVER_get_features, &info);
305 if (!ret)
306 ret = sprintf(buffer, "%08x", info.submap);
307
308 return ret;
309}
310
311static ssize_t features_show(struct hyp_sysfs_attr *attr, char *buffer)
312{
313 ssize_t len;
314 int i;
315
316 len = 0;
317 for (i = XENFEAT_NR_SUBMAPS-1; i >= 0; i--) {
318 int ret = xen_feature_show(i, buffer + len);
319 if (ret < 0) {
320 if (len == 0)
321 len = ret;
322 break;
323 }
324 len += ret;
325 }
326 if (len > 0)
327 buffer[len++] = '\n';
328
329 return len;
330}
331
332HYPERVISOR_ATTR_RO(features);
333
334static struct attribute *xen_properties_attrs[] = {
335 &capabilities_attr.attr,
336 &changeset_attr.attr,
337 &virtual_start_attr.attr,
338 &pagesize_attr.attr,
339 &features_attr.attr,
340 NULL
341};
342
343static struct attribute_group xen_properties_group = {
344 .name = "properties",
345 .attrs = xen_properties_attrs,
346};
347
348static int __init xen_properties_init(void)
349{
350 return sysfs_create_group(hypervisor_kobj, &xen_properties_group);
351}
352
353static void xen_properties_destroy(void)
354{
355 sysfs_remove_group(hypervisor_kobj, &xen_properties_group);
356}
357
358static int __init hyper_sysfs_init(void)
359{
360 int ret;
361
362 if (!xen_domain())
363 return -ENODEV;
364
365 ret = xen_sysfs_type_init();
366 if (ret)
367 goto out;
368 ret = xen_sysfs_version_init();
369 if (ret)
370 goto version_out;
371 ret = xen_compilation_init();
372 if (ret)
373 goto comp_out;
374 ret = xen_sysfs_uuid_init();
375 if (ret)
376 goto uuid_out;
377 ret = xen_properties_init();
378 if (ret)
379 goto prop_out;
380
381 goto out;
382
383prop_out:
384 xen_sysfs_uuid_destroy();
385uuid_out:
386 xen_compilation_destroy();
387comp_out:
388 xen_sysfs_version_destroy();
389version_out:
390 xen_sysfs_type_destroy();
391out:
392 return ret;
393}
394
395static void __exit hyper_sysfs_exit(void)
396{
397 xen_properties_destroy();
398 xen_compilation_destroy();
399 xen_sysfs_uuid_destroy();
400 xen_sysfs_version_destroy();
401 xen_sysfs_type_destroy();
402
403}
404module_init(hyper_sysfs_init);
405module_exit(hyper_sysfs_exit);
406
407static ssize_t hyp_sysfs_show(struct kobject *kobj,
408 struct attribute *attr,
409 char *buffer)
410{
411 struct hyp_sysfs_attr *hyp_attr;
412 hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr);
413 if (hyp_attr->show)
414 return hyp_attr->show(hyp_attr, buffer);
415 return 0;
416}
417
418static ssize_t hyp_sysfs_store(struct kobject *kobj,
419 struct attribute *attr,
420 const char *buffer,
421 size_t len)
422{
423 struct hyp_sysfs_attr *hyp_attr;
424 hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr);
425 if (hyp_attr->store)
426 return hyp_attr->store(hyp_attr, buffer, len);
427 return 0;
428}
429
430static const struct sysfs_ops hyp_sysfs_ops = {
431 .show = hyp_sysfs_show,
432 .store = hyp_sysfs_store,
433};
434
435static struct kobj_type hyp_sysfs_kobj_type = {
436 .sysfs_ops = &hyp_sysfs_ops,
437};
438
439static int __init hypervisor_subsys_init(void)
440{
441 if (!xen_domain())
442 return -ENODEV;
443
444 hypervisor_kobj->ktype = &hyp_sysfs_kobj_type;
445 return 0;
446}
447device_initcall(hypervisor_subsys_init);
448
