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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);
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);