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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
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/* xen version attributes */
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/* UUID */
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/* xen compilation attributes */
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/* xen properties info */
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);
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * copyright (c) 2006 IBM Corporation
4 * Authored by: Mike D. Day <ncmike@us.ibm.com>
5 */
6
7#include <linux/slab.h>
8#include <linux/kernel.h>
9#include <linux/init.h>
10#include <linux/kobject.h>
11#include <linux/err.h>
12
13#include <asm/xen/hypervisor.h>
14#include <asm/xen/hypercall.h>
15
16#include <xen/xen.h>
17#include <xen/xenbus.h>
18#include <xen/interface/xen.h>
19#include <xen/interface/version.h>
20#ifdef CONFIG_XEN_HAVE_VPMU
21#include <xen/interface/xenpmu.h>
22#endif
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 ssize_t guest_type_show(struct hyp_sysfs_attr *attr, char *buffer)
51{
52 const char *type;
53
54 switch (xen_domain_type) {
55 case XEN_NATIVE:
56 /* ARM only. */
57 type = "Xen";
58 break;
59 case XEN_PV_DOMAIN:
60 type = "PV";
61 break;
62 case XEN_HVM_DOMAIN:
63 type = xen_pvh_domain() ? "PVH" : "HVM";
64 break;
65 default:
66 return -EINVAL;
67 }
68
69 return sprintf(buffer, "%s\n", type);
70}
71
72HYPERVISOR_ATTR_RO(guest_type);
73
74static int __init xen_sysfs_guest_type_init(void)
75{
76 return sysfs_create_file(hypervisor_kobj, &guest_type_attr.attr);
77}
78
79/* xen version attributes */
80static ssize_t major_show(struct hyp_sysfs_attr *attr, char *buffer)
81{
82 int version = HYPERVISOR_xen_version(XENVER_version, NULL);
83 if (version)
84 return sprintf(buffer, "%d\n", version >> 16);
85 return -ENODEV;
86}
87
88HYPERVISOR_ATTR_RO(major);
89
90static ssize_t minor_show(struct hyp_sysfs_attr *attr, char *buffer)
91{
92 int version = HYPERVISOR_xen_version(XENVER_version, NULL);
93 if (version)
94 return sprintf(buffer, "%d\n", version & 0xff);
95 return -ENODEV;
96}
97
98HYPERVISOR_ATTR_RO(minor);
99
100static ssize_t extra_show(struct hyp_sysfs_attr *attr, char *buffer)
101{
102 int ret = -ENOMEM;
103 char *extra;
104
105 extra = kmalloc(XEN_EXTRAVERSION_LEN, GFP_KERNEL);
106 if (extra) {
107 ret = HYPERVISOR_xen_version(XENVER_extraversion, extra);
108 if (!ret)
109 ret = sprintf(buffer, "%s\n", extra);
110 kfree(extra);
111 }
112
113 return ret;
114}
115
116HYPERVISOR_ATTR_RO(extra);
117
118static struct attribute *version_attrs[] = {
119 &major_attr.attr,
120 &minor_attr.attr,
121 &extra_attr.attr,
122 NULL
123};
124
125static const struct attribute_group version_group = {
126 .name = "version",
127 .attrs = version_attrs,
128};
129
130static int __init xen_sysfs_version_init(void)
131{
132 return sysfs_create_group(hypervisor_kobj, &version_group);
133}
134
135/* UUID */
136
137static ssize_t uuid_show_fallback(struct hyp_sysfs_attr *attr, char *buffer)
138{
139 char *vm, *val;
140 int ret;
141 extern int xenstored_ready;
142
143 if (!xenstored_ready)
144 return -EBUSY;
145
146 vm = xenbus_read(XBT_NIL, "vm", "", NULL);
147 if (IS_ERR(vm))
148 return PTR_ERR(vm);
149 val = xenbus_read(XBT_NIL, vm, "uuid", NULL);
150 kfree(vm);
151 if (IS_ERR(val))
152 return PTR_ERR(val);
153 ret = sprintf(buffer, "%s\n", val);
154 kfree(val);
155 return ret;
156}
157
158static ssize_t uuid_show(struct hyp_sysfs_attr *attr, char *buffer)
159{
160 xen_domain_handle_t uuid;
161 int ret;
162 ret = HYPERVISOR_xen_version(XENVER_guest_handle, uuid);
163 if (ret)
164 return uuid_show_fallback(attr, buffer);
165 ret = sprintf(buffer, "%pU\n", uuid);
166 return ret;
167}
168
169HYPERVISOR_ATTR_RO(uuid);
170
171static int __init xen_sysfs_uuid_init(void)
172{
173 return sysfs_create_file(hypervisor_kobj, &uuid_attr.attr);
174}
175
176/* xen compilation attributes */
177
178static ssize_t compiler_show(struct hyp_sysfs_attr *attr, char *buffer)
179{
180 int ret = -ENOMEM;
181 struct xen_compile_info *info;
182
183 info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL);
184 if (info) {
185 ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
186 if (!ret)
187 ret = sprintf(buffer, "%s\n", info->compiler);
188 kfree(info);
189 }
190
191 return ret;
192}
193
194HYPERVISOR_ATTR_RO(compiler);
195
196static ssize_t compiled_by_show(struct hyp_sysfs_attr *attr, char *buffer)
197{
198 int ret = -ENOMEM;
199 struct xen_compile_info *info;
200
201 info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL);
202 if (info) {
203 ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
204 if (!ret)
205 ret = sprintf(buffer, "%s\n", info->compile_by);
206 kfree(info);
207 }
208
209 return ret;
210}
211
212HYPERVISOR_ATTR_RO(compiled_by);
213
214static ssize_t compile_date_show(struct hyp_sysfs_attr *attr, char *buffer)
215{
216 int ret = -ENOMEM;
217 struct xen_compile_info *info;
218
219 info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL);
220 if (info) {
221 ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
222 if (!ret)
223 ret = sprintf(buffer, "%s\n", info->compile_date);
224 kfree(info);
225 }
226
227 return ret;
228}
229
230HYPERVISOR_ATTR_RO(compile_date);
231
232static struct attribute *xen_compile_attrs[] = {
233 &compiler_attr.attr,
234 &compiled_by_attr.attr,
235 &compile_date_attr.attr,
236 NULL
237};
238
239static const struct attribute_group xen_compilation_group = {
240 .name = "compilation",
241 .attrs = xen_compile_attrs,
242};
243
244static int __init xen_sysfs_compilation_init(void)
245{
246 return sysfs_create_group(hypervisor_kobj, &xen_compilation_group);
247}
248
249/* xen properties info */
250
251static ssize_t capabilities_show(struct hyp_sysfs_attr *attr, char *buffer)
252{
253 int ret = -ENOMEM;
254 char *caps;
255
256 caps = kmalloc(XEN_CAPABILITIES_INFO_LEN, GFP_KERNEL);
257 if (caps) {
258 ret = HYPERVISOR_xen_version(XENVER_capabilities, caps);
259 if (!ret)
260 ret = sprintf(buffer, "%s\n", caps);
261 kfree(caps);
262 }
263
264 return ret;
265}
266
267HYPERVISOR_ATTR_RO(capabilities);
268
269static ssize_t changeset_show(struct hyp_sysfs_attr *attr, char *buffer)
270{
271 int ret = -ENOMEM;
272 char *cset;
273
274 cset = kmalloc(XEN_CHANGESET_INFO_LEN, GFP_KERNEL);
275 if (cset) {
276 ret = HYPERVISOR_xen_version(XENVER_changeset, cset);
277 if (!ret)
278 ret = sprintf(buffer, "%s\n", cset);
279 kfree(cset);
280 }
281
282 return ret;
283}
284
285HYPERVISOR_ATTR_RO(changeset);
286
287static ssize_t virtual_start_show(struct hyp_sysfs_attr *attr, char *buffer)
288{
289 int ret = -ENOMEM;
290 struct xen_platform_parameters *parms;
291
292 parms = kmalloc(sizeof(struct xen_platform_parameters), GFP_KERNEL);
293 if (parms) {
294 ret = HYPERVISOR_xen_version(XENVER_platform_parameters,
295 parms);
296 if (!ret)
297 ret = sprintf(buffer, "%"PRI_xen_ulong"\n",
298 parms->virt_start);
299 kfree(parms);
300 }
301
302 return ret;
303}
304
305HYPERVISOR_ATTR_RO(virtual_start);
306
307static ssize_t pagesize_show(struct hyp_sysfs_attr *attr, char *buffer)
308{
309 int ret;
310
311 ret = HYPERVISOR_xen_version(XENVER_pagesize, NULL);
312 if (ret > 0)
313 ret = sprintf(buffer, "%x\n", ret);
314
315 return ret;
316}
317
318HYPERVISOR_ATTR_RO(pagesize);
319
320static ssize_t xen_feature_show(int index, char *buffer)
321{
322 ssize_t ret;
323 struct xen_feature_info info;
324
325 info.submap_idx = index;
326 ret = HYPERVISOR_xen_version(XENVER_get_features, &info);
327 if (!ret)
328 ret = sprintf(buffer, "%08x", info.submap);
329
330 return ret;
331}
332
333static ssize_t features_show(struct hyp_sysfs_attr *attr, char *buffer)
334{
335 ssize_t len;
336 int i;
337
338 len = 0;
339 for (i = XENFEAT_NR_SUBMAPS-1; i >= 0; i--) {
340 int ret = xen_feature_show(i, buffer + len);
341 if (ret < 0) {
342 if (len == 0)
343 len = ret;
344 break;
345 }
346 len += ret;
347 }
348 if (len > 0)
349 buffer[len++] = '\n';
350
351 return len;
352}
353
354HYPERVISOR_ATTR_RO(features);
355
356static ssize_t buildid_show(struct hyp_sysfs_attr *attr, char *buffer)
357{
358 ssize_t ret;
359 struct xen_build_id *buildid;
360
361 ret = HYPERVISOR_xen_version(XENVER_build_id, NULL);
362 if (ret < 0) {
363 if (ret == -EPERM)
364 ret = sprintf(buffer, "<denied>");
365 return ret;
366 }
367
368 buildid = kmalloc(sizeof(*buildid) + ret, GFP_KERNEL);
369 if (!buildid)
370 return -ENOMEM;
371
372 buildid->len = ret;
373 ret = HYPERVISOR_xen_version(XENVER_build_id, buildid);
374 if (ret > 0)
375 ret = sprintf(buffer, "%s", buildid->buf);
376 kfree(buildid);
377
378 return ret;
379}
380
381HYPERVISOR_ATTR_RO(buildid);
382
383static struct attribute *xen_properties_attrs[] = {
384 &capabilities_attr.attr,
385 &changeset_attr.attr,
386 &virtual_start_attr.attr,
387 &pagesize_attr.attr,
388 &features_attr.attr,
389 &buildid_attr.attr,
390 NULL
391};
392
393static const struct attribute_group xen_properties_group = {
394 .name = "properties",
395 .attrs = xen_properties_attrs,
396};
397
398static int __init xen_sysfs_properties_init(void)
399{
400 return sysfs_create_group(hypervisor_kobj, &xen_properties_group);
401}
402
403#ifdef CONFIG_XEN_HAVE_VPMU
404struct pmu_mode {
405 const char *name;
406 uint32_t mode;
407};
408
409static struct pmu_mode pmu_modes[] = {
410 {"off", XENPMU_MODE_OFF},
411 {"self", XENPMU_MODE_SELF},
412 {"hv", XENPMU_MODE_HV},
413 {"all", XENPMU_MODE_ALL}
414};
415
416static ssize_t pmu_mode_store(struct hyp_sysfs_attr *attr,
417 const char *buffer, size_t len)
418{
419 int ret;
420 struct xen_pmu_params xp;
421 int i;
422
423 for (i = 0; i < ARRAY_SIZE(pmu_modes); i++) {
424 if (strncmp(buffer, pmu_modes[i].name, len - 1) == 0) {
425 xp.val = pmu_modes[i].mode;
426 break;
427 }
428 }
429
430 if (i == ARRAY_SIZE(pmu_modes))
431 return -EINVAL;
432
433 xp.version.maj = XENPMU_VER_MAJ;
434 xp.version.min = XENPMU_VER_MIN;
435 ret = HYPERVISOR_xenpmu_op(XENPMU_mode_set, &xp);
436 if (ret)
437 return ret;
438
439 return len;
440}
441
442static ssize_t pmu_mode_show(struct hyp_sysfs_attr *attr, char *buffer)
443{
444 int ret;
445 struct xen_pmu_params xp;
446 int i;
447 uint32_t mode;
448
449 xp.version.maj = XENPMU_VER_MAJ;
450 xp.version.min = XENPMU_VER_MIN;
451 ret = HYPERVISOR_xenpmu_op(XENPMU_mode_get, &xp);
452 if (ret)
453 return ret;
454
455 mode = (uint32_t)xp.val;
456 for (i = 0; i < ARRAY_SIZE(pmu_modes); i++) {
457 if (mode == pmu_modes[i].mode)
458 return sprintf(buffer, "%s\n", pmu_modes[i].name);
459 }
460
461 return -EINVAL;
462}
463HYPERVISOR_ATTR_RW(pmu_mode);
464
465static ssize_t pmu_features_store(struct hyp_sysfs_attr *attr,
466 const char *buffer, size_t len)
467{
468 int ret;
469 uint32_t features;
470 struct xen_pmu_params xp;
471
472 ret = kstrtou32(buffer, 0, &features);
473 if (ret)
474 return ret;
475
476 xp.val = features;
477 xp.version.maj = XENPMU_VER_MAJ;
478 xp.version.min = XENPMU_VER_MIN;
479 ret = HYPERVISOR_xenpmu_op(XENPMU_feature_set, &xp);
480 if (ret)
481 return ret;
482
483 return len;
484}
485
486static ssize_t pmu_features_show(struct hyp_sysfs_attr *attr, char *buffer)
487{
488 int ret;
489 struct xen_pmu_params xp;
490
491 xp.version.maj = XENPMU_VER_MAJ;
492 xp.version.min = XENPMU_VER_MIN;
493 ret = HYPERVISOR_xenpmu_op(XENPMU_feature_get, &xp);
494 if (ret)
495 return ret;
496
497 return sprintf(buffer, "0x%x\n", (uint32_t)xp.val);
498}
499HYPERVISOR_ATTR_RW(pmu_features);
500
501static struct attribute *xen_pmu_attrs[] = {
502 &pmu_mode_attr.attr,
503 &pmu_features_attr.attr,
504 NULL
505};
506
507static const struct attribute_group xen_pmu_group = {
508 .name = "pmu",
509 .attrs = xen_pmu_attrs,
510};
511
512static int __init xen_sysfs_pmu_init(void)
513{
514 return sysfs_create_group(hypervisor_kobj, &xen_pmu_group);
515}
516#endif
517
518static int __init hyper_sysfs_init(void)
519{
520 int ret;
521
522 if (!xen_domain())
523 return -ENODEV;
524
525 ret = xen_sysfs_type_init();
526 if (ret)
527 goto out;
528 ret = xen_sysfs_guest_type_init();
529 if (ret)
530 goto guest_type_out;
531 ret = xen_sysfs_version_init();
532 if (ret)
533 goto version_out;
534 ret = xen_sysfs_compilation_init();
535 if (ret)
536 goto comp_out;
537 ret = xen_sysfs_uuid_init();
538 if (ret)
539 goto uuid_out;
540 ret = xen_sysfs_properties_init();
541 if (ret)
542 goto prop_out;
543#ifdef CONFIG_XEN_HAVE_VPMU
544 if (xen_initial_domain()) {
545 ret = xen_sysfs_pmu_init();
546 if (ret) {
547 sysfs_remove_group(hypervisor_kobj,
548 &xen_properties_group);
549 goto prop_out;
550 }
551 }
552#endif
553 goto out;
554
555prop_out:
556 sysfs_remove_file(hypervisor_kobj, &uuid_attr.attr);
557uuid_out:
558 sysfs_remove_group(hypervisor_kobj, &xen_compilation_group);
559comp_out:
560 sysfs_remove_group(hypervisor_kobj, &version_group);
561version_out:
562 sysfs_remove_file(hypervisor_kobj, &guest_type_attr.attr);
563guest_type_out:
564 sysfs_remove_file(hypervisor_kobj, &type_attr.attr);
565out:
566 return ret;
567}
568device_initcall(hyper_sysfs_init);
569
570static ssize_t hyp_sysfs_show(struct kobject *kobj,
571 struct attribute *attr,
572 char *buffer)
573{
574 struct hyp_sysfs_attr *hyp_attr;
575 hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr);
576 if (hyp_attr->show)
577 return hyp_attr->show(hyp_attr, buffer);
578 return 0;
579}
580
581static ssize_t hyp_sysfs_store(struct kobject *kobj,
582 struct attribute *attr,
583 const char *buffer,
584 size_t len)
585{
586 struct hyp_sysfs_attr *hyp_attr;
587 hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr);
588 if (hyp_attr->store)
589 return hyp_attr->store(hyp_attr, buffer, len);
590 return 0;
591}
592
593static const struct sysfs_ops hyp_sysfs_ops = {
594 .show = hyp_sysfs_show,
595 .store = hyp_sysfs_store,
596};
597
598static struct kobj_type hyp_sysfs_kobj_type = {
599 .sysfs_ops = &hyp_sysfs_ops,
600};
601
602static int __init hypervisor_subsys_init(void)
603{
604 if (!xen_domain())
605 return -ENODEV;
606
607 hypervisor_kobj->ktype = &hyp_sysfs_kobj_type;
608 return 0;
609}
610device_initcall(hypervisor_subsys_init);