Commit | Line | Data |
---|---|---|
cff7e81b JF |
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 | ||
5a0e3ad6 | 10 | #include <linux/slab.h> |
cff7e81b JF |
11 | #include <linux/kernel.h> |
12 | #include <linux/module.h> | |
13 | #include <linux/kobject.h> | |
609b0b8c | 14 | #include <linux/err.h> |
cff7e81b JF |
15 | |
16 | #include <asm/xen/hypervisor.h> | |
17 | #include <asm/xen/hypercall.h> | |
18 | ||
1ccbf534 | 19 | #include <xen/xen.h> |
cff7e81b JF |
20 | #include <xen/xenbus.h> |
21 | #include <xen/interface/xen.h> | |
22 | #include <xen/interface/version.h> | |
5f141548 BO |
23 | #ifdef CONFIG_XEN_HAVE_VPMU |
24 | #include <xen/interface/xenpmu.h> | |
25 | #endif | |
cff7e81b JF |
26 | |
27 | #define HYPERVISOR_ATTR_RO(_name) \ | |
28 | static struct hyp_sysfs_attr _name##_attr = __ATTR_RO(_name) | |
29 | ||
30 | #define HYPERVISOR_ATTR_RW(_name) \ | |
31 | static struct hyp_sysfs_attr _name##_attr = \ | |
32 | __ATTR(_name, 0644, _name##_show, _name##_store) | |
33 | ||
34 | struct 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 | ||
41 | static ssize_t type_show(struct hyp_sysfs_attr *attr, char *buffer) | |
42 | { | |
43 | return sprintf(buffer, "xen\n"); | |
44 | } | |
45 | ||
46 | HYPERVISOR_ATTR_RO(type); | |
47 | ||
48 | static int __init xen_sysfs_type_init(void) | |
49 | { | |
50 | return sysfs_create_file(hypervisor_kobj, &type_attr.attr); | |
51 | } | |
52 | ||
53 | static void xen_sysfs_type_destroy(void) | |
54 | { | |
55 | sysfs_remove_file(hypervisor_kobj, &type_attr.attr); | |
56 | } | |
57 | ||
58 | /* xen version attributes */ | |
59 | static ssize_t major_show(struct hyp_sysfs_attr *attr, char *buffer) | |
60 | { | |
61 | int version = HYPERVISOR_xen_version(XENVER_version, NULL); | |
62 | if (version) | |
63 | return sprintf(buffer, "%d\n", version >> 16); | |
64 | return -ENODEV; | |
65 | } | |
66 | ||
67 | HYPERVISOR_ATTR_RO(major); | |
68 | ||
69 | static ssize_t minor_show(struct hyp_sysfs_attr *attr, char *buffer) | |
70 | { | |
71 | int version = HYPERVISOR_xen_version(XENVER_version, NULL); | |
72 | if (version) | |
73 | return sprintf(buffer, "%d\n", version & 0xff); | |
74 | return -ENODEV; | |
75 | } | |
76 | ||
77 | HYPERVISOR_ATTR_RO(minor); | |
78 | ||
79 | static ssize_t extra_show(struct hyp_sysfs_attr *attr, char *buffer) | |
80 | { | |
81 | int ret = -ENOMEM; | |
82 | char *extra; | |
83 | ||
84 | extra = kmalloc(XEN_EXTRAVERSION_LEN, GFP_KERNEL); | |
85 | if (extra) { | |
86 | ret = HYPERVISOR_xen_version(XENVER_extraversion, extra); | |
87 | if (!ret) | |
88 | ret = sprintf(buffer, "%s\n", extra); | |
89 | kfree(extra); | |
90 | } | |
91 | ||
92 | return ret; | |
93 | } | |
94 | ||
95 | HYPERVISOR_ATTR_RO(extra); | |
96 | ||
97 | static struct attribute *version_attrs[] = { | |
98 | &major_attr.attr, | |
99 | &minor_attr.attr, | |
100 | &extra_attr.attr, | |
101 | NULL | |
102 | }; | |
103 | ||
ead1d014 | 104 | static const struct attribute_group version_group = { |
cff7e81b JF |
105 | .name = "version", |
106 | .attrs = version_attrs, | |
107 | }; | |
108 | ||
109 | static int __init xen_sysfs_version_init(void) | |
110 | { | |
111 | return sysfs_create_group(hypervisor_kobj, &version_group); | |
112 | } | |
113 | ||
114 | static void xen_sysfs_version_destroy(void) | |
115 | { | |
116 | sysfs_remove_group(hypervisor_kobj, &version_group); | |
117 | } | |
118 | ||
119 | /* UUID */ | |
120 | ||
5c13f806 | 121 | static ssize_t uuid_show_fallback(struct hyp_sysfs_attr *attr, char *buffer) |
cff7e81b JF |
122 | { |
123 | char *vm, *val; | |
124 | int ret; | |
125 | extern int xenstored_ready; | |
126 | ||
127 | if (!xenstored_ready) | |
128 | return -EBUSY; | |
129 | ||
130 | vm = xenbus_read(XBT_NIL, "vm", "", NULL); | |
131 | if (IS_ERR(vm)) | |
132 | return PTR_ERR(vm); | |
133 | val = xenbus_read(XBT_NIL, vm, "uuid", NULL); | |
134 | kfree(vm); | |
135 | if (IS_ERR(val)) | |
136 | return PTR_ERR(val); | |
137 | ret = sprintf(buffer, "%s\n", val); | |
138 | kfree(val); | |
139 | return ret; | |
140 | } | |
141 | ||
5c13f806 DDG |
142 | static ssize_t uuid_show(struct hyp_sysfs_attr *attr, char *buffer) |
143 | { | |
144 | xen_domain_handle_t uuid; | |
145 | int ret; | |
146 | ret = HYPERVISOR_xen_version(XENVER_guest_handle, uuid); | |
147 | if (ret) | |
148 | return uuid_show_fallback(attr, buffer); | |
149 | ret = sprintf(buffer, "%pU\n", uuid); | |
150 | return ret; | |
151 | } | |
152 | ||
cff7e81b JF |
153 | HYPERVISOR_ATTR_RO(uuid); |
154 | ||
155 | static int __init xen_sysfs_uuid_init(void) | |
156 | { | |
157 | return sysfs_create_file(hypervisor_kobj, &uuid_attr.attr); | |
158 | } | |
159 | ||
160 | static void xen_sysfs_uuid_destroy(void) | |
161 | { | |
162 | sysfs_remove_file(hypervisor_kobj, &uuid_attr.attr); | |
163 | } | |
164 | ||
165 | /* xen compilation attributes */ | |
166 | ||
167 | static ssize_t compiler_show(struct hyp_sysfs_attr *attr, char *buffer) | |
168 | { | |
169 | int ret = -ENOMEM; | |
170 | struct xen_compile_info *info; | |
171 | ||
172 | info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL); | |
173 | if (info) { | |
174 | ret = HYPERVISOR_xen_version(XENVER_compile_info, info); | |
175 | if (!ret) | |
176 | ret = sprintf(buffer, "%s\n", info->compiler); | |
177 | kfree(info); | |
178 | } | |
179 | ||
180 | return ret; | |
181 | } | |
182 | ||
183 | HYPERVISOR_ATTR_RO(compiler); | |
184 | ||
185 | static ssize_t compiled_by_show(struct hyp_sysfs_attr *attr, char *buffer) | |
186 | { | |
187 | int ret = -ENOMEM; | |
188 | struct xen_compile_info *info; | |
189 | ||
190 | info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL); | |
191 | if (info) { | |
192 | ret = HYPERVISOR_xen_version(XENVER_compile_info, info); | |
193 | if (!ret) | |
194 | ret = sprintf(buffer, "%s\n", info->compile_by); | |
195 | kfree(info); | |
196 | } | |
197 | ||
198 | return ret; | |
199 | } | |
200 | ||
201 | HYPERVISOR_ATTR_RO(compiled_by); | |
202 | ||
203 | static ssize_t compile_date_show(struct hyp_sysfs_attr *attr, char *buffer) | |
204 | { | |
205 | int ret = -ENOMEM; | |
206 | struct xen_compile_info *info; | |
207 | ||
208 | info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL); | |
209 | if (info) { | |
210 | ret = HYPERVISOR_xen_version(XENVER_compile_info, info); | |
211 | if (!ret) | |
212 | ret = sprintf(buffer, "%s\n", info->compile_date); | |
213 | kfree(info); | |
214 | } | |
215 | ||
216 | return ret; | |
217 | } | |
218 | ||
219 | HYPERVISOR_ATTR_RO(compile_date); | |
220 | ||
221 | static struct attribute *xen_compile_attrs[] = { | |
222 | &compiler_attr.attr, | |
223 | &compiled_by_attr.attr, | |
224 | &compile_date_attr.attr, | |
225 | NULL | |
226 | }; | |
227 | ||
ead1d014 | 228 | static const struct attribute_group xen_compilation_group = { |
cff7e81b JF |
229 | .name = "compilation", |
230 | .attrs = xen_compile_attrs, | |
231 | }; | |
232 | ||
887cb456 | 233 | static int __init xen_compilation_init(void) |
cff7e81b JF |
234 | { |
235 | return sysfs_create_group(hypervisor_kobj, &xen_compilation_group); | |
236 | } | |
237 | ||
238 | static void xen_compilation_destroy(void) | |
239 | { | |
240 | sysfs_remove_group(hypervisor_kobj, &xen_compilation_group); | |
241 | } | |
242 | ||
243 | /* xen properties info */ | |
244 | ||
245 | static ssize_t capabilities_show(struct hyp_sysfs_attr *attr, char *buffer) | |
246 | { | |
247 | int ret = -ENOMEM; | |
248 | char *caps; | |
249 | ||
250 | caps = kmalloc(XEN_CAPABILITIES_INFO_LEN, GFP_KERNEL); | |
251 | if (caps) { | |
252 | ret = HYPERVISOR_xen_version(XENVER_capabilities, caps); | |
253 | if (!ret) | |
254 | ret = sprintf(buffer, "%s\n", caps); | |
255 | kfree(caps); | |
256 | } | |
257 | ||
258 | return ret; | |
259 | } | |
260 | ||
261 | HYPERVISOR_ATTR_RO(capabilities); | |
262 | ||
263 | static ssize_t changeset_show(struct hyp_sysfs_attr *attr, char *buffer) | |
264 | { | |
265 | int ret = -ENOMEM; | |
266 | char *cset; | |
267 | ||
268 | cset = kmalloc(XEN_CHANGESET_INFO_LEN, GFP_KERNEL); | |
269 | if (cset) { | |
270 | ret = HYPERVISOR_xen_version(XENVER_changeset, cset); | |
271 | if (!ret) | |
272 | ret = sprintf(buffer, "%s\n", cset); | |
273 | kfree(cset); | |
274 | } | |
275 | ||
276 | return ret; | |
277 | } | |
278 | ||
279 | HYPERVISOR_ATTR_RO(changeset); | |
280 | ||
281 | static ssize_t virtual_start_show(struct hyp_sysfs_attr *attr, char *buffer) | |
282 | { | |
283 | int ret = -ENOMEM; | |
284 | struct xen_platform_parameters *parms; | |
285 | ||
286 | parms = kmalloc(sizeof(struct xen_platform_parameters), GFP_KERNEL); | |
287 | if (parms) { | |
288 | ret = HYPERVISOR_xen_version(XENVER_platform_parameters, | |
289 | parms); | |
290 | if (!ret) | |
37ea0fcb IC |
291 | ret = sprintf(buffer, "%"PRI_xen_ulong"\n", |
292 | parms->virt_start); | |
cff7e81b JF |
293 | kfree(parms); |
294 | } | |
295 | ||
296 | return ret; | |
297 | } | |
298 | ||
299 | HYPERVISOR_ATTR_RO(virtual_start); | |
300 | ||
301 | static ssize_t pagesize_show(struct hyp_sysfs_attr *attr, char *buffer) | |
302 | { | |
303 | int ret; | |
304 | ||
305 | ret = HYPERVISOR_xen_version(XENVER_pagesize, NULL); | |
306 | if (ret > 0) | |
307 | ret = sprintf(buffer, "%x\n", ret); | |
308 | ||
309 | return ret; | |
310 | } | |
311 | ||
312 | HYPERVISOR_ATTR_RO(pagesize); | |
313 | ||
cff7e81b JF |
314 | static ssize_t xen_feature_show(int index, char *buffer) |
315 | { | |
a649b720 JF |
316 | ssize_t ret; |
317 | struct xen_feature_info info; | |
cff7e81b | 318 | |
a649b720 JF |
319 | info.submap_idx = index; |
320 | ret = HYPERVISOR_xen_version(XENVER_get_features, &info); | |
321 | if (!ret) | |
322 | ret = sprintf(buffer, "%08x", info.submap); | |
cff7e81b JF |
323 | |
324 | return ret; | |
325 | } | |
326 | ||
a649b720 | 327 | static ssize_t features_show(struct hyp_sysfs_attr *attr, char *buffer) |
cff7e81b | 328 | { |
a649b720 JF |
329 | ssize_t len; |
330 | int i; | |
331 | ||
332 | len = 0; | |
333 | for (i = XENFEAT_NR_SUBMAPS-1; i >= 0; i--) { | |
334 | int ret = xen_feature_show(i, buffer + len); | |
335 | if (ret < 0) { | |
336 | if (len == 0) | |
337 | len = ret; | |
338 | break; | |
339 | } | |
340 | len += ret; | |
341 | } | |
342 | if (len > 0) | |
343 | buffer[len++] = '\n'; | |
344 | ||
345 | return len; | |
cff7e81b JF |
346 | } |
347 | ||
a649b720 | 348 | HYPERVISOR_ATTR_RO(features); |
cff7e81b JF |
349 | |
350 | static struct attribute *xen_properties_attrs[] = { | |
351 | &capabilities_attr.attr, | |
352 | &changeset_attr.attr, | |
353 | &virtual_start_attr.attr, | |
354 | &pagesize_attr.attr, | |
a649b720 | 355 | &features_attr.attr, |
cff7e81b JF |
356 | NULL |
357 | }; | |
358 | ||
ead1d014 | 359 | static const struct attribute_group xen_properties_group = { |
cff7e81b JF |
360 | .name = "properties", |
361 | .attrs = xen_properties_attrs, | |
362 | }; | |
363 | ||
364 | static int __init xen_properties_init(void) | |
365 | { | |
366 | return sysfs_create_group(hypervisor_kobj, &xen_properties_group); | |
367 | } | |
368 | ||
369 | static void xen_properties_destroy(void) | |
370 | { | |
371 | sysfs_remove_group(hypervisor_kobj, &xen_properties_group); | |
372 | } | |
373 | ||
5f141548 BO |
374 | #ifdef CONFIG_XEN_HAVE_VPMU |
375 | struct pmu_mode { | |
376 | const char *name; | |
377 | uint32_t mode; | |
378 | }; | |
379 | ||
380 | static struct pmu_mode pmu_modes[] = { | |
381 | {"off", XENPMU_MODE_OFF}, | |
382 | {"self", XENPMU_MODE_SELF}, | |
383 | {"hv", XENPMU_MODE_HV}, | |
384 | {"all", XENPMU_MODE_ALL} | |
385 | }; | |
386 | ||
387 | static ssize_t pmu_mode_store(struct hyp_sysfs_attr *attr, | |
388 | const char *buffer, size_t len) | |
389 | { | |
390 | int ret; | |
391 | struct xen_pmu_params xp; | |
392 | int i; | |
393 | ||
394 | for (i = 0; i < ARRAY_SIZE(pmu_modes); i++) { | |
395 | if (strncmp(buffer, pmu_modes[i].name, len - 1) == 0) { | |
396 | xp.val = pmu_modes[i].mode; | |
397 | break; | |
398 | } | |
399 | } | |
400 | ||
401 | if (i == ARRAY_SIZE(pmu_modes)) | |
402 | return -EINVAL; | |
403 | ||
404 | xp.version.maj = XENPMU_VER_MAJ; | |
405 | xp.version.min = XENPMU_VER_MIN; | |
406 | ret = HYPERVISOR_xenpmu_op(XENPMU_mode_set, &xp); | |
407 | if (ret) | |
408 | return ret; | |
409 | ||
410 | return len; | |
411 | } | |
412 | ||
413 | static ssize_t pmu_mode_show(struct hyp_sysfs_attr *attr, char *buffer) | |
414 | { | |
415 | int ret; | |
416 | struct xen_pmu_params xp; | |
417 | int i; | |
418 | uint32_t mode; | |
419 | ||
420 | xp.version.maj = XENPMU_VER_MAJ; | |
421 | xp.version.min = XENPMU_VER_MIN; | |
422 | ret = HYPERVISOR_xenpmu_op(XENPMU_mode_get, &xp); | |
423 | if (ret) | |
424 | return ret; | |
425 | ||
426 | mode = (uint32_t)xp.val; | |
427 | for (i = 0; i < ARRAY_SIZE(pmu_modes); i++) { | |
428 | if (mode == pmu_modes[i].mode) | |
429 | return sprintf(buffer, "%s\n", pmu_modes[i].name); | |
430 | } | |
431 | ||
432 | return -EINVAL; | |
433 | } | |
434 | HYPERVISOR_ATTR_RW(pmu_mode); | |
435 | ||
436 | static ssize_t pmu_features_store(struct hyp_sysfs_attr *attr, | |
437 | const char *buffer, size_t len) | |
438 | { | |
439 | int ret; | |
440 | uint32_t features; | |
441 | struct xen_pmu_params xp; | |
442 | ||
443 | ret = kstrtou32(buffer, 0, &features); | |
444 | if (ret) | |
445 | return ret; | |
446 | ||
447 | xp.val = features; | |
448 | xp.version.maj = XENPMU_VER_MAJ; | |
449 | xp.version.min = XENPMU_VER_MIN; | |
450 | ret = HYPERVISOR_xenpmu_op(XENPMU_feature_set, &xp); | |
451 | if (ret) | |
452 | return ret; | |
453 | ||
454 | return len; | |
455 | } | |
456 | ||
457 | static ssize_t pmu_features_show(struct hyp_sysfs_attr *attr, char *buffer) | |
458 | { | |
459 | int ret; | |
460 | struct xen_pmu_params xp; | |
461 | ||
462 | xp.version.maj = XENPMU_VER_MAJ; | |
463 | xp.version.min = XENPMU_VER_MIN; | |
464 | ret = HYPERVISOR_xenpmu_op(XENPMU_feature_get, &xp); | |
465 | if (ret) | |
466 | return ret; | |
467 | ||
468 | return sprintf(buffer, "0x%x\n", (uint32_t)xp.val); | |
469 | } | |
470 | HYPERVISOR_ATTR_RW(pmu_features); | |
471 | ||
472 | static struct attribute *xen_pmu_attrs[] = { | |
473 | &pmu_mode_attr.attr, | |
474 | &pmu_features_attr.attr, | |
475 | NULL | |
476 | }; | |
477 | ||
478 | static const struct attribute_group xen_pmu_group = { | |
479 | .name = "pmu", | |
480 | .attrs = xen_pmu_attrs, | |
481 | }; | |
482 | ||
483 | static int __init xen_pmu_init(void) | |
484 | { | |
485 | return sysfs_create_group(hypervisor_kobj, &xen_pmu_group); | |
486 | } | |
487 | ||
488 | static void xen_pmu_destroy(void) | |
489 | { | |
490 | sysfs_remove_group(hypervisor_kobj, &xen_pmu_group); | |
491 | } | |
492 | #endif | |
493 | ||
cff7e81b JF |
494 | static int __init hyper_sysfs_init(void) |
495 | { | |
496 | int ret; | |
497 | ||
498 | if (!xen_domain()) | |
499 | return -ENODEV; | |
500 | ||
501 | ret = xen_sysfs_type_init(); | |
502 | if (ret) | |
503 | goto out; | |
504 | ret = xen_sysfs_version_init(); | |
505 | if (ret) | |
506 | goto version_out; | |
507 | ret = xen_compilation_init(); | |
508 | if (ret) | |
509 | goto comp_out; | |
510 | ret = xen_sysfs_uuid_init(); | |
511 | if (ret) | |
512 | goto uuid_out; | |
513 | ret = xen_properties_init(); | |
514 | if (ret) | |
515 | goto prop_out; | |
5f141548 BO |
516 | #ifdef CONFIG_XEN_HAVE_VPMU |
517 | if (xen_initial_domain()) { | |
518 | ret = xen_pmu_init(); | |
519 | if (ret) { | |
520 | xen_properties_destroy(); | |
521 | goto prop_out; | |
522 | } | |
523 | } | |
524 | #endif | |
cff7e81b JF |
525 | goto out; |
526 | ||
cff7e81b JF |
527 | prop_out: |
528 | xen_sysfs_uuid_destroy(); | |
529 | uuid_out: | |
530 | xen_compilation_destroy(); | |
531 | comp_out: | |
532 | xen_sysfs_version_destroy(); | |
533 | version_out: | |
534 | xen_sysfs_type_destroy(); | |
535 | out: | |
536 | return ret; | |
537 | } | |
538 | ||
539 | static void __exit hyper_sysfs_exit(void) | |
540 | { | |
5f141548 BO |
541 | #ifdef CONFIG_XEN_HAVE_VPMU |
542 | xen_pmu_destroy(); | |
543 | #endif | |
cff7e81b JF |
544 | xen_properties_destroy(); |
545 | xen_compilation_destroy(); | |
546 | xen_sysfs_uuid_destroy(); | |
547 | xen_sysfs_version_destroy(); | |
548 | xen_sysfs_type_destroy(); | |
549 | ||
550 | } | |
551 | module_init(hyper_sysfs_init); | |
552 | module_exit(hyper_sysfs_exit); | |
553 | ||
554 | static ssize_t hyp_sysfs_show(struct kobject *kobj, | |
555 | struct attribute *attr, | |
556 | char *buffer) | |
557 | { | |
558 | struct hyp_sysfs_attr *hyp_attr; | |
559 | hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr); | |
560 | if (hyp_attr->show) | |
561 | return hyp_attr->show(hyp_attr, buffer); | |
562 | return 0; | |
563 | } | |
564 | ||
565 | static ssize_t hyp_sysfs_store(struct kobject *kobj, | |
566 | struct attribute *attr, | |
567 | const char *buffer, | |
568 | size_t len) | |
569 | { | |
570 | struct hyp_sysfs_attr *hyp_attr; | |
571 | hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr); | |
572 | if (hyp_attr->store) | |
573 | return hyp_attr->store(hyp_attr, buffer, len); | |
574 | return 0; | |
575 | } | |
576 | ||
52cf25d0 | 577 | static const struct sysfs_ops hyp_sysfs_ops = { |
cff7e81b JF |
578 | .show = hyp_sysfs_show, |
579 | .store = hyp_sysfs_store, | |
580 | }; | |
581 | ||
582 | static struct kobj_type hyp_sysfs_kobj_type = { | |
583 | .sysfs_ops = &hyp_sysfs_ops, | |
584 | }; | |
585 | ||
586 | static int __init hypervisor_subsys_init(void) | |
587 | { | |
588 | if (!xen_domain()) | |
589 | return -ENODEV; | |
590 | ||
591 | hypervisor_kobj->ktype = &hyp_sysfs_kobj_type; | |
592 | return 0; | |
593 | } | |
594 | device_initcall(hypervisor_subsys_init); |