Loading...
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/*
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_sysfs_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_sysfs_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_sysfs_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_sysfs_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_sysfs_properties_init();
484 if (ret)
485 goto prop_out;
486#ifdef CONFIG_XEN_HAVE_VPMU
487 if (xen_initial_domain()) {
488 ret = xen_sysfs_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);