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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 = __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);
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);