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