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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/*
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/init.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#ifdef CONFIG_XEN_HAVE_VPMU
24#include <xen/interface/xenpmu.h>
25#endif
26
27#define HYPERVISOR_ATTR_RO(_name) \
28static struct hyp_sysfs_attr _name##_attr = __ATTR_RO(_name)
29
30#define HYPERVISOR_ATTR_RW(_name) \
31static struct hyp_sysfs_attr _name##_attr = \
32 __ATTR(_name, 0644, _name##_show, _name##_store)
33
34struct hyp_sysfs_attr {
35 struct attribute attr;
36 ssize_t (*show)(struct hyp_sysfs_attr *, char *);
37 ssize_t (*store)(struct hyp_sysfs_attr *, const char *, size_t);
38 void *hyp_attr_data;
39};
40
41static ssize_t type_show(struct hyp_sysfs_attr *attr, char *buffer)
42{
43 return sprintf(buffer, "xen\n");
44}
45
46HYPERVISOR_ATTR_RO(type);
47
48static int __init xen_sysfs_type_init(void)
49{
50 return sysfs_create_file(hypervisor_kobj, &type_attr.attr);
51}
52
53/* xen version attributes */
54static ssize_t major_show(struct hyp_sysfs_attr *attr, char *buffer)
55{
56 int version = HYPERVISOR_xen_version(XENVER_version, NULL);
57 if (version)
58 return sprintf(buffer, "%d\n", version >> 16);
59 return -ENODEV;
60}
61
62HYPERVISOR_ATTR_RO(major);
63
64static ssize_t minor_show(struct hyp_sysfs_attr *attr, char *buffer)
65{
66 int version = HYPERVISOR_xen_version(XENVER_version, NULL);
67 if (version)
68 return sprintf(buffer, "%d\n", version & 0xff);
69 return -ENODEV;
70}
71
72HYPERVISOR_ATTR_RO(minor);
73
74static ssize_t extra_show(struct hyp_sysfs_attr *attr, char *buffer)
75{
76 int ret = -ENOMEM;
77 char *extra;
78
79 extra = kmalloc(XEN_EXTRAVERSION_LEN, GFP_KERNEL);
80 if (extra) {
81 ret = HYPERVISOR_xen_version(XENVER_extraversion, extra);
82 if (!ret)
83 ret = sprintf(buffer, "%s\n", extra);
84 kfree(extra);
85 }
86
87 return ret;
88}
89
90HYPERVISOR_ATTR_RO(extra);
91
92static struct attribute *version_attrs[] = {
93 &major_attr.attr,
94 &minor_attr.attr,
95 &extra_attr.attr,
96 NULL
97};
98
99static const struct attribute_group version_group = {
100 .name = "version",
101 .attrs = version_attrs,
102};
103
104static int __init xen_sysfs_version_init(void)
105{
106 return sysfs_create_group(hypervisor_kobj, &version_group);
107}
108
109/* UUID */
110
111static ssize_t uuid_show_fallback(struct hyp_sysfs_attr *attr, char *buffer)
112{
113 char *vm, *val;
114 int ret;
115 extern int xenstored_ready;
116
117 if (!xenstored_ready)
118 return -EBUSY;
119
120 vm = xenbus_read(XBT_NIL, "vm", "", NULL);
121 if (IS_ERR(vm))
122 return PTR_ERR(vm);
123 val = xenbus_read(XBT_NIL, vm, "uuid", NULL);
124 kfree(vm);
125 if (IS_ERR(val))
126 return PTR_ERR(val);
127 ret = sprintf(buffer, "%s\n", val);
128 kfree(val);
129 return ret;
130}
131
132static ssize_t uuid_show(struct hyp_sysfs_attr *attr, char *buffer)
133{
134 xen_domain_handle_t uuid;
135 int ret;
136 ret = HYPERVISOR_xen_version(XENVER_guest_handle, uuid);
137 if (ret)
138 return uuid_show_fallback(attr, buffer);
139 ret = sprintf(buffer, "%pU\n", uuid);
140 return ret;
141}
142
143HYPERVISOR_ATTR_RO(uuid);
144
145static int __init xen_sysfs_uuid_init(void)
146{
147 return sysfs_create_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 const 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
223/* xen properties info */
224
225static ssize_t capabilities_show(struct hyp_sysfs_attr *attr, char *buffer)
226{
227 int ret = -ENOMEM;
228 char *caps;
229
230 caps = kmalloc(XEN_CAPABILITIES_INFO_LEN, GFP_KERNEL);
231 if (caps) {
232 ret = HYPERVISOR_xen_version(XENVER_capabilities, caps);
233 if (!ret)
234 ret = sprintf(buffer, "%s\n", caps);
235 kfree(caps);
236 }
237
238 return ret;
239}
240
241HYPERVISOR_ATTR_RO(capabilities);
242
243static ssize_t changeset_show(struct hyp_sysfs_attr *attr, char *buffer)
244{
245 int ret = -ENOMEM;
246 char *cset;
247
248 cset = kmalloc(XEN_CHANGESET_INFO_LEN, GFP_KERNEL);
249 if (cset) {
250 ret = HYPERVISOR_xen_version(XENVER_changeset, cset);
251 if (!ret)
252 ret = sprintf(buffer, "%s\n", cset);
253 kfree(cset);
254 }
255
256 return ret;
257}
258
259HYPERVISOR_ATTR_RO(changeset);
260
261static ssize_t virtual_start_show(struct hyp_sysfs_attr *attr, char *buffer)
262{
263 int ret = -ENOMEM;
264 struct xen_platform_parameters *parms;
265
266 parms = kmalloc(sizeof(struct xen_platform_parameters), GFP_KERNEL);
267 if (parms) {
268 ret = HYPERVISOR_xen_version(XENVER_platform_parameters,
269 parms);
270 if (!ret)
271 ret = sprintf(buffer, "%"PRI_xen_ulong"\n",
272 parms->virt_start);
273 kfree(parms);
274 }
275
276 return ret;
277}
278
279HYPERVISOR_ATTR_RO(virtual_start);
280
281static ssize_t pagesize_show(struct hyp_sysfs_attr *attr, char *buffer)
282{
283 int ret;
284
285 ret = HYPERVISOR_xen_version(XENVER_pagesize, NULL);
286 if (ret > 0)
287 ret = sprintf(buffer, "%x\n", ret);
288
289 return ret;
290}
291
292HYPERVISOR_ATTR_RO(pagesize);
293
294static ssize_t xen_feature_show(int index, char *buffer)
295{
296 ssize_t ret;
297 struct xen_feature_info info;
298
299 info.submap_idx = index;
300 ret = HYPERVISOR_xen_version(XENVER_get_features, &info);
301 if (!ret)
302 ret = sprintf(buffer, "%08x", info.submap);
303
304 return ret;
305}
306
307static ssize_t features_show(struct hyp_sysfs_attr *attr, char *buffer)
308{
309 ssize_t len;
310 int i;
311
312 len = 0;
313 for (i = XENFEAT_NR_SUBMAPS-1; i >= 0; i--) {
314 int ret = xen_feature_show(i, buffer + len);
315 if (ret < 0) {
316 if (len == 0)
317 len = ret;
318 break;
319 }
320 len += ret;
321 }
322 if (len > 0)
323 buffer[len++] = '\n';
324
325 return len;
326}
327
328HYPERVISOR_ATTR_RO(features);
329
330static struct attribute *xen_properties_attrs[] = {
331 &capabilities_attr.attr,
332 &changeset_attr.attr,
333 &virtual_start_attr.attr,
334 &pagesize_attr.attr,
335 &features_attr.attr,
336 NULL
337};
338
339static const struct attribute_group xen_properties_group = {
340 .name = "properties",
341 .attrs = xen_properties_attrs,
342};
343
344static int __init xen_properties_init(void)
345{
346 return sysfs_create_group(hypervisor_kobj, &xen_properties_group);
347}
348
349#ifdef CONFIG_XEN_HAVE_VPMU
350struct pmu_mode {
351 const char *name;
352 uint32_t mode;
353};
354
355static struct pmu_mode pmu_modes[] = {
356 {"off", XENPMU_MODE_OFF},
357 {"self", XENPMU_MODE_SELF},
358 {"hv", XENPMU_MODE_HV},
359 {"all", XENPMU_MODE_ALL}
360};
361
362static ssize_t pmu_mode_store(struct hyp_sysfs_attr *attr,
363 const char *buffer, size_t len)
364{
365 int ret;
366 struct xen_pmu_params xp;
367 int i;
368
369 for (i = 0; i < ARRAY_SIZE(pmu_modes); i++) {
370 if (strncmp(buffer, pmu_modes[i].name, len - 1) == 0) {
371 xp.val = pmu_modes[i].mode;
372 break;
373 }
374 }
375
376 if (i == ARRAY_SIZE(pmu_modes))
377 return -EINVAL;
378
379 xp.version.maj = XENPMU_VER_MAJ;
380 xp.version.min = XENPMU_VER_MIN;
381 ret = HYPERVISOR_xenpmu_op(XENPMU_mode_set, &xp);
382 if (ret)
383 return ret;
384
385 return len;
386}
387
388static ssize_t pmu_mode_show(struct hyp_sysfs_attr *attr, char *buffer)
389{
390 int ret;
391 struct xen_pmu_params xp;
392 int i;
393 uint32_t mode;
394
395 xp.version.maj = XENPMU_VER_MAJ;
396 xp.version.min = XENPMU_VER_MIN;
397 ret = HYPERVISOR_xenpmu_op(XENPMU_mode_get, &xp);
398 if (ret)
399 return ret;
400
401 mode = (uint32_t)xp.val;
402 for (i = 0; i < ARRAY_SIZE(pmu_modes); i++) {
403 if (mode == pmu_modes[i].mode)
404 return sprintf(buffer, "%s\n", pmu_modes[i].name);
405 }
406
407 return -EINVAL;
408}
409HYPERVISOR_ATTR_RW(pmu_mode);
410
411static ssize_t pmu_features_store(struct hyp_sysfs_attr *attr,
412 const char *buffer, size_t len)
413{
414 int ret;
415 uint32_t features;
416 struct xen_pmu_params xp;
417
418 ret = kstrtou32(buffer, 0, &features);
419 if (ret)
420 return ret;
421
422 xp.val = features;
423 xp.version.maj = XENPMU_VER_MAJ;
424 xp.version.min = XENPMU_VER_MIN;
425 ret = HYPERVISOR_xenpmu_op(XENPMU_feature_set, &xp);
426 if (ret)
427 return ret;
428
429 return len;
430}
431
432static ssize_t pmu_features_show(struct hyp_sysfs_attr *attr, char *buffer)
433{
434 int ret;
435 struct xen_pmu_params xp;
436
437 xp.version.maj = XENPMU_VER_MAJ;
438 xp.version.min = XENPMU_VER_MIN;
439 ret = HYPERVISOR_xenpmu_op(XENPMU_feature_get, &xp);
440 if (ret)
441 return ret;
442
443 return sprintf(buffer, "0x%x\n", (uint32_t)xp.val);
444}
445HYPERVISOR_ATTR_RW(pmu_features);
446
447static struct attribute *xen_pmu_attrs[] = {
448 &pmu_mode_attr.attr,
449 &pmu_features_attr.attr,
450 NULL
451};
452
453static const struct attribute_group xen_pmu_group = {
454 .name = "pmu",
455 .attrs = xen_pmu_attrs,
456};
457
458static int __init xen_pmu_init(void)
459{
460 return sysfs_create_group(hypervisor_kobj, &xen_pmu_group);
461}
462#endif
463
464static int __init hyper_sysfs_init(void)
465{
466 int ret;
467
468 if (!xen_domain())
469 return -ENODEV;
470
471 ret = xen_sysfs_type_init();
472 if (ret)
473 goto out;
474 ret = xen_sysfs_version_init();
475 if (ret)
476 goto version_out;
477 ret = xen_compilation_init();
478 if (ret)
479 goto comp_out;
480 ret = xen_sysfs_uuid_init();
481 if (ret)
482 goto uuid_out;
483 ret = xen_properties_init();
484 if (ret)
485 goto prop_out;
486#ifdef CONFIG_XEN_HAVE_VPMU
487 if (xen_initial_domain()) {
488 ret = xen_pmu_init();
489 if (ret) {
490 sysfs_remove_group(hypervisor_kobj,
491 &xen_properties_group);
492 goto prop_out;
493 }
494 }
495#endif
496 goto out;
497
498prop_out:
499 sysfs_remove_file(hypervisor_kobj, &uuid_attr.attr);
500uuid_out:
501 sysfs_remove_group(hypervisor_kobj, &xen_compilation_group);
502comp_out:
503 sysfs_remove_group(hypervisor_kobj, &version_group);
504version_out:
505 sysfs_remove_file(hypervisor_kobj, &type_attr.attr);
506out:
507 return ret;
508}
509device_initcall(hyper_sysfs_init);
510
511static ssize_t hyp_sysfs_show(struct kobject *kobj,
512 struct attribute *attr,
513 char *buffer)
514{
515 struct hyp_sysfs_attr *hyp_attr;
516 hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr);
517 if (hyp_attr->show)
518 return hyp_attr->show(hyp_attr, buffer);
519 return 0;
520}
521
522static ssize_t hyp_sysfs_store(struct kobject *kobj,
523 struct attribute *attr,
524 const char *buffer,
525 size_t len)
526{
527 struct hyp_sysfs_attr *hyp_attr;
528 hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr);
529 if (hyp_attr->store)
530 return hyp_attr->store(hyp_attr, buffer, len);
531 return 0;
532}
533
534static const struct sysfs_ops hyp_sysfs_ops = {
535 .show = hyp_sysfs_show,
536 .store = hyp_sysfs_store,
537};
538
539static struct kobj_type hyp_sysfs_kobj_type = {
540 .sysfs_ops = &hyp_sysfs_ops,
541};
542
543static int __init hypervisor_subsys_init(void)
544{
545 if (!xen_domain())
546 return -ENODEV;
547
548 hypervisor_kobj->ktype = &hyp_sysfs_kobj_type;
549 return 0;
550}
551device_initcall(hypervisor_subsys_init);