Loading...
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 = __ATTR_RW(_name)
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 union {
35 void *hyp_attr_data;
36 unsigned long hyp_attr_value;
37 };
38};
39
40static ssize_t type_show(struct hyp_sysfs_attr *attr, char *buffer)
41{
42 return sprintf(buffer, "xen\n");
43}
44
45HYPERVISOR_ATTR_RO(type);
46
47static int __init xen_sysfs_type_init(void)
48{
49 return sysfs_create_file(hypervisor_kobj, &type_attr.attr);
50}
51
52static ssize_t guest_type_show(struct hyp_sysfs_attr *attr, char *buffer)
53{
54 const char *type;
55
56 switch (xen_domain_type) {
57 case XEN_NATIVE:
58 /* ARM only. */
59 type = "Xen";
60 break;
61 case XEN_PV_DOMAIN:
62 type = "PV";
63 break;
64 case XEN_HVM_DOMAIN:
65 type = xen_pvh_domain() ? "PVH" : "HVM";
66 break;
67 default:
68 return -EINVAL;
69 }
70
71 return sprintf(buffer, "%s\n", type);
72}
73
74HYPERVISOR_ATTR_RO(guest_type);
75
76static int __init xen_sysfs_guest_type_init(void)
77{
78 return sysfs_create_file(hypervisor_kobj, &guest_type_attr.attr);
79}
80
81/* xen version attributes */
82static ssize_t major_show(struct hyp_sysfs_attr *attr, char *buffer)
83{
84 int version = HYPERVISOR_xen_version(XENVER_version, NULL);
85 if (version)
86 return sprintf(buffer, "%d\n", version >> 16);
87 return -ENODEV;
88}
89
90HYPERVISOR_ATTR_RO(major);
91
92static ssize_t minor_show(struct hyp_sysfs_attr *attr, char *buffer)
93{
94 int version = HYPERVISOR_xen_version(XENVER_version, NULL);
95 if (version)
96 return sprintf(buffer, "%d\n", version & 0xff);
97 return -ENODEV;
98}
99
100HYPERVISOR_ATTR_RO(minor);
101
102static ssize_t extra_show(struct hyp_sysfs_attr *attr, char *buffer)
103{
104 int ret = -ENOMEM;
105 char *extra;
106
107 extra = kmalloc(XEN_EXTRAVERSION_LEN, GFP_KERNEL);
108 if (extra) {
109 ret = HYPERVISOR_xen_version(XENVER_extraversion, extra);
110 if (!ret)
111 ret = sprintf(buffer, "%s\n", extra);
112 kfree(extra);
113 }
114
115 return ret;
116}
117
118HYPERVISOR_ATTR_RO(extra);
119
120static struct attribute *version_attrs[] = {
121 &major_attr.attr,
122 &minor_attr.attr,
123 &extra_attr.attr,
124 NULL
125};
126
127static const struct attribute_group version_group = {
128 .name = "version",
129 .attrs = version_attrs,
130};
131
132static int __init xen_sysfs_version_init(void)
133{
134 return sysfs_create_group(hypervisor_kobj, &version_group);
135}
136
137/* UUID */
138
139static ssize_t uuid_show_fallback(struct hyp_sysfs_attr *attr, char *buffer)
140{
141 char *vm, *val;
142 int ret;
143 extern int xenstored_ready;
144
145 if (!xenstored_ready)
146 return -EBUSY;
147
148 vm = xenbus_read(XBT_NIL, "vm", "", NULL);
149 if (IS_ERR(vm))
150 return PTR_ERR(vm);
151 val = xenbus_read(XBT_NIL, vm, "uuid", NULL);
152 kfree(vm);
153 if (IS_ERR(val))
154 return PTR_ERR(val);
155 ret = sprintf(buffer, "%s\n", val);
156 kfree(val);
157 return ret;
158}
159
160static ssize_t uuid_show(struct hyp_sysfs_attr *attr, char *buffer)
161{
162 xen_domain_handle_t uuid;
163 int ret;
164 ret = HYPERVISOR_xen_version(XENVER_guest_handle, uuid);
165 if (ret)
166 return uuid_show_fallback(attr, buffer);
167 ret = sprintf(buffer, "%pU\n", uuid);
168 return ret;
169}
170
171HYPERVISOR_ATTR_RO(uuid);
172
173static int __init xen_sysfs_uuid_init(void)
174{
175 return sysfs_create_file(hypervisor_kobj, &uuid_attr.attr);
176}
177
178/* xen compilation attributes */
179
180static ssize_t compiler_show(struct hyp_sysfs_attr *attr, char *buffer)
181{
182 int ret = -ENOMEM;
183 struct xen_compile_info *info;
184
185 info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL);
186 if (info) {
187 ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
188 if (!ret)
189 ret = sprintf(buffer, "%s\n", info->compiler);
190 kfree(info);
191 }
192
193 return ret;
194}
195
196HYPERVISOR_ATTR_RO(compiler);
197
198static ssize_t compiled_by_show(struct hyp_sysfs_attr *attr, char *buffer)
199{
200 int ret = -ENOMEM;
201 struct xen_compile_info *info;
202
203 info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL);
204 if (info) {
205 ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
206 if (!ret)
207 ret = sprintf(buffer, "%s\n", info->compile_by);
208 kfree(info);
209 }
210
211 return ret;
212}
213
214HYPERVISOR_ATTR_RO(compiled_by);
215
216static ssize_t compile_date_show(struct hyp_sysfs_attr *attr, char *buffer)
217{
218 int ret = -ENOMEM;
219 struct xen_compile_info *info;
220
221 info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL);
222 if (info) {
223 ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
224 if (!ret)
225 ret = sprintf(buffer, "%s\n", info->compile_date);
226 kfree(info);
227 }
228
229 return ret;
230}
231
232HYPERVISOR_ATTR_RO(compile_date);
233
234static struct attribute *xen_compile_attrs[] = {
235 &compiler_attr.attr,
236 &compiled_by_attr.attr,
237 &compile_date_attr.attr,
238 NULL
239};
240
241static const struct attribute_group xen_compilation_group = {
242 .name = "compilation",
243 .attrs = xen_compile_attrs,
244};
245
246static int __init xen_sysfs_compilation_init(void)
247{
248 return sysfs_create_group(hypervisor_kobj, &xen_compilation_group);
249}
250
251/* xen properties info */
252
253static ssize_t capabilities_show(struct hyp_sysfs_attr *attr, char *buffer)
254{
255 int ret = -ENOMEM;
256 char *caps;
257
258 caps = kmalloc(XEN_CAPABILITIES_INFO_LEN, GFP_KERNEL);
259 if (caps) {
260 ret = HYPERVISOR_xen_version(XENVER_capabilities, caps);
261 if (!ret)
262 ret = sprintf(buffer, "%s\n", caps);
263 kfree(caps);
264 }
265
266 return ret;
267}
268
269HYPERVISOR_ATTR_RO(capabilities);
270
271static ssize_t changeset_show(struct hyp_sysfs_attr *attr, char *buffer)
272{
273 int ret = -ENOMEM;
274 char *cset;
275
276 cset = kmalloc(XEN_CHANGESET_INFO_LEN, GFP_KERNEL);
277 if (cset) {
278 ret = HYPERVISOR_xen_version(XENVER_changeset, cset);
279 if (!ret)
280 ret = sprintf(buffer, "%s\n", cset);
281 kfree(cset);
282 }
283
284 return ret;
285}
286
287HYPERVISOR_ATTR_RO(changeset);
288
289static ssize_t virtual_start_show(struct hyp_sysfs_attr *attr, char *buffer)
290{
291 int ret = -ENOMEM;
292 struct xen_platform_parameters *parms;
293
294 parms = kmalloc(sizeof(struct xen_platform_parameters), GFP_KERNEL);
295 if (parms) {
296 ret = HYPERVISOR_xen_version(XENVER_platform_parameters,
297 parms);
298 if (!ret)
299 ret = sprintf(buffer, "%"PRI_xen_ulong"\n",
300 parms->virt_start);
301 kfree(parms);
302 }
303
304 return ret;
305}
306
307HYPERVISOR_ATTR_RO(virtual_start);
308
309static ssize_t pagesize_show(struct hyp_sysfs_attr *attr, char *buffer)
310{
311 int ret;
312
313 ret = HYPERVISOR_xen_version(XENVER_pagesize, NULL);
314 if (ret > 0)
315 ret = sprintf(buffer, "%x\n", ret);
316
317 return ret;
318}
319
320HYPERVISOR_ATTR_RO(pagesize);
321
322static ssize_t xen_feature_show(int index, char *buffer)
323{
324 ssize_t ret;
325 struct xen_feature_info info;
326
327 info.submap_idx = index;
328 ret = HYPERVISOR_xen_version(XENVER_get_features, &info);
329 if (!ret)
330 ret = sprintf(buffer, "%08x", info.submap);
331
332 return ret;
333}
334
335static ssize_t features_show(struct hyp_sysfs_attr *attr, char *buffer)
336{
337 ssize_t len;
338 int i;
339
340 len = 0;
341 for (i = XENFEAT_NR_SUBMAPS-1; i >= 0; i--) {
342 int ret = xen_feature_show(i, buffer + len);
343 if (ret < 0) {
344 if (len == 0)
345 len = ret;
346 break;
347 }
348 len += ret;
349 }
350 if (len > 0)
351 buffer[len++] = '\n';
352
353 return len;
354}
355
356HYPERVISOR_ATTR_RO(features);
357
358static ssize_t buildid_show(struct hyp_sysfs_attr *attr, char *buffer)
359{
360 ssize_t ret;
361 struct xen_build_id *buildid;
362
363 ret = HYPERVISOR_xen_version(XENVER_build_id, NULL);
364 if (ret < 0) {
365 if (ret == -EPERM)
366 ret = sprintf(buffer, "<denied>");
367 return ret;
368 }
369
370 buildid = kmalloc(sizeof(*buildid) + ret, GFP_KERNEL);
371 if (!buildid)
372 return -ENOMEM;
373
374 buildid->len = ret;
375 ret = HYPERVISOR_xen_version(XENVER_build_id, buildid);
376 if (ret > 0)
377 ret = sprintf(buffer, "%s", buildid->buf);
378 kfree(buildid);
379
380 return ret;
381}
382
383HYPERVISOR_ATTR_RO(buildid);
384
385static struct attribute *xen_properties_attrs[] = {
386 &capabilities_attr.attr,
387 &changeset_attr.attr,
388 &virtual_start_attr.attr,
389 &pagesize_attr.attr,
390 &features_attr.attr,
391 &buildid_attr.attr,
392 NULL
393};
394
395static const struct attribute_group xen_properties_group = {
396 .name = "properties",
397 .attrs = xen_properties_attrs,
398};
399
400static int __init xen_sysfs_properties_init(void)
401{
402 return sysfs_create_group(hypervisor_kobj, &xen_properties_group);
403}
404
405#define FLAG_UNAME "unknown"
406#define FLAG_UNAME_FMT FLAG_UNAME "%02u"
407#define FLAG_UNAME_MAX sizeof(FLAG_UNAME "XX")
408#define FLAG_COUNT (sizeof(xen_start_flags) * BITS_PER_BYTE)
409static_assert(sizeof(xen_start_flags) <=
410 sizeof_field(struct hyp_sysfs_attr, hyp_attr_value));
411
412static ssize_t flag_show(struct hyp_sysfs_attr *attr, char *buffer)
413{
414 char *p = buffer;
415
416 *p++ = '0' + ((xen_start_flags & attr->hyp_attr_value) != 0);
417 *p++ = '\n';
418 return p - buffer;
419}
420
421#define FLAG_NODE(flag, node) \
422 [ilog2(flag)] = { \
423 .attr = { .name = #node, .mode = 0444 },\
424 .show = flag_show, \
425 .hyp_attr_value = flag \
426 }
427
428/*
429 * Add new, known flags here. No other changes are required, but
430 * note that each known flag wastes one entry in flag_unames[].
431 * The code/complexity machinations to avoid this isn't worth it
432 * for a few entries, but keep it in mind.
433 */
434static struct hyp_sysfs_attr flag_attrs[FLAG_COUNT] = {
435 FLAG_NODE(SIF_PRIVILEGED, privileged),
436 FLAG_NODE(SIF_INITDOMAIN, initdomain)
437};
438static struct attribute_group xen_flags_group = {
439 .name = "start_flags",
440 .attrs = (struct attribute *[FLAG_COUNT + 1]){}
441};
442static char flag_unames[FLAG_COUNT][FLAG_UNAME_MAX];
443
444static int __init xen_sysfs_flags_init(void)
445{
446 for (unsigned fnum = 0; fnum != FLAG_COUNT; fnum++) {
447 if (likely(flag_attrs[fnum].attr.name == NULL)) {
448 sprintf(flag_unames[fnum], FLAG_UNAME_FMT, fnum);
449 flag_attrs[fnum].attr.name = flag_unames[fnum];
450 flag_attrs[fnum].attr.mode = 0444;
451 flag_attrs[fnum].show = flag_show;
452 flag_attrs[fnum].hyp_attr_value = 1 << fnum;
453 }
454 xen_flags_group.attrs[fnum] = &flag_attrs[fnum].attr;
455 }
456 return sysfs_create_group(hypervisor_kobj, &xen_flags_group);
457}
458
459#ifdef CONFIG_XEN_HAVE_VPMU
460struct pmu_mode {
461 const char *name;
462 uint32_t mode;
463};
464
465static struct pmu_mode pmu_modes[] = {
466 {"off", XENPMU_MODE_OFF},
467 {"self", XENPMU_MODE_SELF},
468 {"hv", XENPMU_MODE_HV},
469 {"all", XENPMU_MODE_ALL}
470};
471
472static ssize_t pmu_mode_store(struct hyp_sysfs_attr *attr,
473 const char *buffer, size_t len)
474{
475 int ret;
476 struct xen_pmu_params xp;
477 int i;
478
479 for (i = 0; i < ARRAY_SIZE(pmu_modes); i++) {
480 if (strncmp(buffer, pmu_modes[i].name, len - 1) == 0) {
481 xp.val = pmu_modes[i].mode;
482 break;
483 }
484 }
485
486 if (i == ARRAY_SIZE(pmu_modes))
487 return -EINVAL;
488
489 xp.version.maj = XENPMU_VER_MAJ;
490 xp.version.min = XENPMU_VER_MIN;
491 ret = HYPERVISOR_xenpmu_op(XENPMU_mode_set, &xp);
492 if (ret)
493 return ret;
494
495 return len;
496}
497
498static ssize_t pmu_mode_show(struct hyp_sysfs_attr *attr, char *buffer)
499{
500 int ret;
501 struct xen_pmu_params xp;
502 int i;
503 uint32_t mode;
504
505 xp.version.maj = XENPMU_VER_MAJ;
506 xp.version.min = XENPMU_VER_MIN;
507 ret = HYPERVISOR_xenpmu_op(XENPMU_mode_get, &xp);
508 if (ret)
509 return ret;
510
511 mode = (uint32_t)xp.val;
512 for (i = 0; i < ARRAY_SIZE(pmu_modes); i++) {
513 if (mode == pmu_modes[i].mode)
514 return sprintf(buffer, "%s\n", pmu_modes[i].name);
515 }
516
517 return -EINVAL;
518}
519HYPERVISOR_ATTR_RW(pmu_mode);
520
521static ssize_t pmu_features_store(struct hyp_sysfs_attr *attr,
522 const char *buffer, size_t len)
523{
524 int ret;
525 uint32_t features;
526 struct xen_pmu_params xp;
527
528 ret = kstrtou32(buffer, 0, &features);
529 if (ret)
530 return ret;
531
532 xp.val = features;
533 xp.version.maj = XENPMU_VER_MAJ;
534 xp.version.min = XENPMU_VER_MIN;
535 ret = HYPERVISOR_xenpmu_op(XENPMU_feature_set, &xp);
536 if (ret)
537 return ret;
538
539 return len;
540}
541
542static ssize_t pmu_features_show(struct hyp_sysfs_attr *attr, char *buffer)
543{
544 int ret;
545 struct xen_pmu_params xp;
546
547 xp.version.maj = XENPMU_VER_MAJ;
548 xp.version.min = XENPMU_VER_MIN;
549 ret = HYPERVISOR_xenpmu_op(XENPMU_feature_get, &xp);
550 if (ret)
551 return ret;
552
553 return sprintf(buffer, "0x%x\n", (uint32_t)xp.val);
554}
555HYPERVISOR_ATTR_RW(pmu_features);
556
557static struct attribute *xen_pmu_attrs[] = {
558 &pmu_mode_attr.attr,
559 &pmu_features_attr.attr,
560 NULL
561};
562
563static const struct attribute_group xen_pmu_group = {
564 .name = "pmu",
565 .attrs = xen_pmu_attrs,
566};
567
568static int __init xen_sysfs_pmu_init(void)
569{
570 return sysfs_create_group(hypervisor_kobj, &xen_pmu_group);
571}
572#endif
573
574static int __init hyper_sysfs_init(void)
575{
576 int ret;
577
578 if (!xen_domain())
579 return -ENODEV;
580
581 ret = xen_sysfs_type_init();
582 if (ret)
583 goto out;
584 ret = xen_sysfs_guest_type_init();
585 if (ret)
586 goto guest_type_out;
587 ret = xen_sysfs_version_init();
588 if (ret)
589 goto version_out;
590 ret = xen_sysfs_compilation_init();
591 if (ret)
592 goto comp_out;
593 ret = xen_sysfs_uuid_init();
594 if (ret)
595 goto uuid_out;
596 ret = xen_sysfs_properties_init();
597 if (ret)
598 goto prop_out;
599 ret = xen_sysfs_flags_init();
600 if (ret)
601 goto flags_out;
602#ifdef CONFIG_XEN_HAVE_VPMU
603 if (xen_initial_domain()) {
604 ret = xen_sysfs_pmu_init();
605 if (ret) {
606 sysfs_remove_group(hypervisor_kobj, &xen_flags_group);
607 goto flags_out;
608 }
609 }
610#endif
611 goto out;
612
613flags_out:
614 sysfs_remove_group(hypervisor_kobj, &xen_properties_group);
615prop_out:
616 sysfs_remove_file(hypervisor_kobj, &uuid_attr.attr);
617uuid_out:
618 sysfs_remove_group(hypervisor_kobj, &xen_compilation_group);
619comp_out:
620 sysfs_remove_group(hypervisor_kobj, &version_group);
621version_out:
622 sysfs_remove_file(hypervisor_kobj, &guest_type_attr.attr);
623guest_type_out:
624 sysfs_remove_file(hypervisor_kobj, &type_attr.attr);
625out:
626 return ret;
627}
628device_initcall(hyper_sysfs_init);
629
630static ssize_t hyp_sysfs_show(struct kobject *kobj,
631 struct attribute *attr,
632 char *buffer)
633{
634 struct hyp_sysfs_attr *hyp_attr;
635 hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr);
636 if (hyp_attr->show)
637 return hyp_attr->show(hyp_attr, buffer);
638 return 0;
639}
640
641static ssize_t hyp_sysfs_store(struct kobject *kobj,
642 struct attribute *attr,
643 const char *buffer,
644 size_t len)
645{
646 struct hyp_sysfs_attr *hyp_attr;
647 hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr);
648 if (hyp_attr->store)
649 return hyp_attr->store(hyp_attr, buffer, len);
650 return 0;
651}
652
653static const struct sysfs_ops hyp_sysfs_ops = {
654 .show = hyp_sysfs_show,
655 .store = hyp_sysfs_store,
656};
657
658static const struct kobj_type hyp_sysfs_kobj_type = {
659 .sysfs_ops = &hyp_sysfs_ops,
660};
661
662static int __init hypervisor_subsys_init(void)
663{
664 if (!xen_domain())
665 return -ENODEV;
666
667 hypervisor_kobj->ktype = &hyp_sysfs_kobj_type;
668 return 0;
669}
670device_initcall(hypervisor_subsys_init);