[linux-2.6-block.git] / drivers / xen / sys-hypervisor.c

/*
 *  copyright (c) 2006 IBM Corporation
 *  Authored by: Mike D. Day <ncmike@us.ibm.com>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 as
 *  published by the Free Software Foundation.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/kobject.h>

#include <asm/xen/hypervisor.h>
#include <asm/xen/hypercall.h>

#include <xen/xen.h>
#include <xen/xenbus.h>
#include <xen/interface/xen.h>
#include <xen/interface/version.h>

#define HYPERVISOR_ATTR_RO(_name) \
static struct hyp_sysfs_attr  _name##_attr = __ATTR_RO(_name)

#define HYPERVISOR_ATTR_RW(_name) \
static struct hyp_sysfs_attr _name##_attr = \
	__ATTR(_name, 0644, _name##_show, _name##_store)

struct hyp_sysfs_attr {
	struct attribute attr;
	ssize_t (*show)(struct hyp_sysfs_attr *, char *);
	ssize_t (*store)(struct hyp_sysfs_attr *, const char *, size_t);
	void *hyp_attr_data;
};

static ssize_t type_show(struct hyp_sysfs_attr *attr, char *buffer)
{
	return sprintf(buffer, "xen\n");
}

HYPERVISOR_ATTR_RO(type);

static int __init xen_sysfs_type_init(void)
{
	return sysfs_create_file(hypervisor_kobj, &type_attr.attr);
}

static void xen_sysfs_type_destroy(void)
{
	sysfs_remove_file(hypervisor_kobj, &type_attr.attr);
}

/* xen version attributes */
static ssize_t major_show(struct hyp_sysfs_attr *attr, char *buffer)
{
	int version = HYPERVISOR_xen_version(XENVER_version, NULL);
	if (version)
		return sprintf(buffer, "%d\n", version >> 16);
	return -ENODEV;
}

HYPERVISOR_ATTR_RO(major);

static ssize_t minor_show(struct hyp_sysfs_attr *attr, char *buffer)
{
	int version = HYPERVISOR_xen_version(XENVER_version, NULL);
	if (version)
		return sprintf(buffer, "%d\n", version & 0xff);
	return -ENODEV;
}

HYPERVISOR_ATTR_RO(minor);

static ssize_t extra_show(struct hyp_sysfs_attr *attr, char *buffer)
{
	int ret = -ENOMEM;
	char *extra;

	extra = kmalloc(XEN_EXTRAVERSION_LEN, GFP_KERNEL);
	if (extra) {
		ret = HYPERVISOR_xen_version(XENVER_extraversion, extra);
		if (!ret)
			ret = sprintf(buffer, "%s\n", extra);
		kfree(extra);
	}

	return ret;
}

HYPERVISOR_ATTR_RO(extra);

static struct attribute *version_attrs[] = {
	&major_attr.attr,
	&minor_attr.attr,
	&extra_attr.attr,
	NULL
};

static struct attribute_group version_group = {
	.name = "version",
	.attrs = version_attrs,
};

static int __init xen_sysfs_version_init(void)
{
	return sysfs_create_group(hypervisor_kobj, &version_group);
}

static void xen_sysfs_version_destroy(void)
{
	sysfs_remove_group(hypervisor_kobj, &version_group);
}

/* UUID */

static ssize_t uuid_show(struct hyp_sysfs_attr *attr, char *buffer)
{
	char *vm, *val;
	int ret;
	extern int xenstored_ready;

	if (!xenstored_ready)
		return -EBUSY;

	vm = xenbus_read(XBT_NIL, "vm", "", NULL);
	if (IS_ERR(vm))
		return PTR_ERR(vm);
	val = xenbus_read(XBT_NIL, vm, "uuid", NULL);
	kfree(vm);
	if (IS_ERR(val))
		return PTR_ERR(val);
	ret = sprintf(buffer, "%s\n", val);
	kfree(val);
	return ret;
}

HYPERVISOR_ATTR_RO(uuid);

static int __init xen_sysfs_uuid_init(void)
{
	return sysfs_create_file(hypervisor_kobj, &uuid_attr.attr);
}

static void xen_sysfs_uuid_destroy(void)
{
	sysfs_remove_file(hypervisor_kobj, &uuid_attr.attr);
}

/* xen compilation attributes */

static ssize_t compiler_show(struct hyp_sysfs_attr *attr, char *buffer)
{
	int ret = -ENOMEM;
	struct xen_compile_info *info;

	info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL);
	if (info) {
		ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
		if (!ret)
			ret = sprintf(buffer, "%s\n", info->compiler);
		kfree(info);
	}

	return ret;
}

HYPERVISOR_ATTR_RO(compiler);

static ssize_t compiled_by_show(struct hyp_sysfs_attr *attr, char *buffer)
{
	int ret = -ENOMEM;
	struct xen_compile_info *info;

	info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL);
	if (info) {
		ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
		if (!ret)
			ret = sprintf(buffer, "%s\n", info->compile_by);
		kfree(info);
	}

	return ret;
}

HYPERVISOR_ATTR_RO(compiled_by);

static ssize_t compile_date_show(struct hyp_sysfs_attr *attr, char *buffer)
{
	int ret = -ENOMEM;
	struct xen_compile_info *info;

	info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL);
	if (info) {
		ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
		if (!ret)
			ret = sprintf(buffer, "%s\n", info->compile_date);
		kfree(info);
	}

	return ret;
}

HYPERVISOR_ATTR_RO(compile_date);

static struct attribute *xen_compile_attrs[] = {
	&compiler_attr.attr,
	&compiled_by_attr.attr,
	&compile_date_attr.attr,
	NULL
};

static struct attribute_group xen_compilation_group = {
	.name = "compilation",
	.attrs = xen_compile_attrs,
};

int __init static xen_compilation_init(void)
{
	return sysfs_create_group(hypervisor_kobj, &xen_compilation_group);
}

static void xen_compilation_destroy(void)
{
	sysfs_remove_group(hypervisor_kobj, &xen_compilation_group);
}

/* xen properties info */

static ssize_t capabilities_show(struct hyp_sysfs_attr *attr, char *buffer)
{
	int ret = -ENOMEM;
	char *caps;

	caps = kmalloc(XEN_CAPABILITIES_INFO_LEN, GFP_KERNEL);
	if (caps) {
		ret = HYPERVISOR_xen_version(XENVER_capabilities, caps);
		if (!ret)
			ret = sprintf(buffer, "%s\n", caps);
		kfree(caps);
	}

	return ret;
}

HYPERVISOR_ATTR_RO(capabilities);

static ssize_t changeset_show(struct hyp_sysfs_attr *attr, char *buffer)
{
	int ret = -ENOMEM;
	char *cset;

	cset = kmalloc(XEN_CHANGESET_INFO_LEN, GFP_KERNEL);
	if (cset) {
		ret = HYPERVISOR_xen_version(XENVER_changeset, cset);
		if (!ret)
			ret = sprintf(buffer, "%s\n", cset);
		kfree(cset);
	}

	return ret;
}

HYPERVISOR_ATTR_RO(changeset);

static ssize_t virtual_start_show(struct hyp_sysfs_attr *attr, char *buffer)
{
	int ret = -ENOMEM;
	struct xen_platform_parameters *parms;

	parms = kmalloc(sizeof(struct xen_platform_parameters), GFP_KERNEL);
	if (parms) {
		ret = HYPERVISOR_xen_version(XENVER_platform_parameters,
					     parms);
		if (!ret)
			ret = sprintf(buffer, "%lx\n", parms->virt_start);
		kfree(parms);
	}

	return ret;
}

HYPERVISOR_ATTR_RO(virtual_start);

static ssize_t pagesize_show(struct hyp_sysfs_attr *attr, char *buffer)
{
	int ret;

	ret = HYPERVISOR_xen_version(XENVER_pagesize, NULL);
	if (ret > 0)
		ret = sprintf(buffer, "%x\n", ret);

	return ret;
}

HYPERVISOR_ATTR_RO(pagesize);

static ssize_t xen_feature_show(int index, char *buffer)
{
	ssize_t ret;
	struct xen_feature_info info;

	info.submap_idx = index;
	ret = HYPERVISOR_xen_version(XENVER_get_features, &info);
	if (!ret)
		ret = sprintf(buffer, "%08x", info.submap);

	return ret;
}

static ssize_t features_show(struct hyp_sysfs_attr *attr, char *buffer)
{
	ssize_t len;
	int i;

	len = 0;
	for (i = XENFEAT_NR_SUBMAPS-1; i >= 0; i--) {
		int ret = xen_feature_show(i, buffer + len);
		if (ret < 0) {
			if (len == 0)
				len = ret;
			break;
		}
		len += ret;
	}
	if (len > 0)
		buffer[len++] = '\n';

	return len;
}

HYPERVISOR_ATTR_RO(features);

static struct attribute *xen_properties_attrs[] = {
	&capabilities_attr.attr,
	&changeset_attr.attr,
	&virtual_start_attr.attr,
	&pagesize_attr.attr,
	&features_attr.attr,
	NULL
};

static struct attribute_group xen_properties_group = {
	.name = "properties",
	.attrs = xen_properties_attrs,
};

static int __init xen_properties_init(void)
{
	return sysfs_create_group(hypervisor_kobj, &xen_properties_group);
}

static void xen_properties_destroy(void)
{
	sysfs_remove_group(hypervisor_kobj, &xen_properties_group);
}

static int __init hyper_sysfs_init(void)
{
	int ret;

	if (!xen_domain())
		return -ENODEV;

	ret = xen_sysfs_type_init();
	if (ret)
		goto out;
	ret = xen_sysfs_version_init();
	if (ret)
		goto version_out;
	ret = xen_compilation_init();
	if (ret)
		goto comp_out;
	ret = xen_sysfs_uuid_init();
	if (ret)
		goto uuid_out;
	ret = xen_properties_init();
	if (ret)
		goto prop_out;

	goto out;

prop_out:
	xen_sysfs_uuid_destroy();
uuid_out:
	xen_compilation_destroy();
comp_out:
	xen_sysfs_version_destroy();
version_out:
	xen_sysfs_type_destroy();
out:
	return ret;
}

static void __exit hyper_sysfs_exit(void)
{
	xen_properties_destroy();
	xen_compilation_destroy();
	xen_sysfs_uuid_destroy();
	xen_sysfs_version_destroy();
	xen_sysfs_type_destroy();

}
module_init(hyper_sysfs_init);
module_exit(hyper_sysfs_exit);

static ssize_t hyp_sysfs_show(struct kobject *kobj,
			      struct attribute *attr,
			      char *buffer)
{
	struct hyp_sysfs_attr *hyp_attr;
	hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr);
	if (hyp_attr->show)
		return hyp_attr->show(hyp_attr, buffer);
	return 0;
}

static ssize_t hyp_sysfs_store(struct kobject *kobj,
			       struct attribute *attr,
			       const char *buffer,
			       size_t len)
{
	struct hyp_sysfs_attr *hyp_attr;
	hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr);
	if (hyp_attr->store)
		return hyp_attr->store(hyp_attr, buffer, len);
	return 0;
}

static struct sysfs_ops hyp_sysfs_ops = {
	.show = hyp_sysfs_show,
	.store = hyp_sysfs_store,
};

static struct kobj_type hyp_sysfs_kobj_type = {
	.sysfs_ops = &hyp_sysfs_ops,
};

static int __init hypervisor_subsys_init(void)
{
	if (!xen_domain())
		return -ENODEV;

	hypervisor_kobj->ktype = &hyp_sysfs_kobj_type;
	return 0;
}
device_initcall(hypervisor_subsys_init);
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
	10	#include <linux/kernel.h>
	11	#include <linux/module.h>
	12	#include <linux/kobject.h>
	13
	14	#include <asm/xen/hypervisor.h>
	15	#include <asm/xen/hypercall.h>
	16
1ccbf534	17	#include <xen/xen.h>
cff7e81b JF	18	#include <xen/xenbus.h>
	19	#include <xen/interface/xen.h>
	20	#include <xen/interface/version.h>
	21
	22	#define HYPERVISOR_ATTR_RO(_name) \
	23	static struct hyp_sysfs_attr _name##_attr = __ATTR_RO(_name)
	24
	25	#define HYPERVISOR_ATTR_RW(_name) \
	26	static struct hyp_sysfs_attr _name##_attr = \
	27	__ATTR(_name, 0644, _name##_show, _name##_store)
	28
	29	struct hyp_sysfs_attr {
	30	struct attribute attr;
	31	ssize_t (show)(struct hyp_sysfs_attr , char *);
	32	ssize_t (store)(struct hyp_sysfs_attr , const char *, size_t);
	33	void *hyp_attr_data;
	34	};
	35
	36	static ssize_t type_show(struct hyp_sysfs_attr attr, char buffer)
	37	{
	38	return sprintf(buffer, "xen\n");
	39	}
	40
	41	HYPERVISOR_ATTR_RO(type);
	42
	43	static int __init xen_sysfs_type_init(void)
	44	{
	45	return sysfs_create_file(hypervisor_kobj, &type_attr.attr);
	46	}
	47
	48	static void xen_sysfs_type_destroy(void)
	49	{
	50	sysfs_remove_file(hypervisor_kobj, &type_attr.attr);
	51	}
	52
	53	/* xen version attributes */
	54	static 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
	62	HYPERVISOR_ATTR_RO(major);
	63
	64	static 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
	72	HYPERVISOR_ATTR_RO(minor);
	73
	74	static 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
90	HYPERVISOR_ATTR_RO(extra);
91
92	static struct attribute *version_attrs[] = {
93	&major_attr.attr,
94	&minor_attr.attr,
95	&extra_attr.attr,
96	NULL
97	};
98
99	static struct attribute_group version_group = {
100	.name = "version",
101	.attrs = version_attrs,
102	};
103
104	static int __init xen_sysfs_version_init(void)
105	{
106	return sysfs_create_group(hypervisor_kobj, &version_group);
107	}
108
109	static void xen_sysfs_version_destroy(void)
110	{
111	sysfs_remove_group(hypervisor_kobj, &version_group);
112	}
113
114	/* UUID */
115
116	static ssize_t uuid_show(struct hyp_sysfs_attr attr, char buffer)
117	{
118	char vm, val;
119	int ret;
120	extern int xenstored_ready;
121
122	if (!xenstored_ready)
123	return -EBUSY;
124
125	vm = xenbus_read(XBT_NIL, "vm", "", NULL);
126	if (IS_ERR(vm))
127	return PTR_ERR(vm);
128	val = xenbus_read(XBT_NIL, vm, "uuid", NULL);
129	kfree(vm);
130	if (IS_ERR(val))
131	return PTR_ERR(val);
132	ret = sprintf(buffer, "%s\n", val);
133	kfree(val);
134	return ret;
135	}
136
137	HYPERVISOR_ATTR_RO(uuid);
138
139	static int __init xen_sysfs_uuid_init(void)
140	{
141	return sysfs_create_file(hypervisor_kobj, &uuid_attr.attr);
142	}
143
144	static void xen_sysfs_uuid_destroy(void)
145	{
146	sysfs_remove_file(hypervisor_kobj, &uuid_attr.attr);
147	}
148
149	/* xen compilation attributes */
150
151	static ssize_t compiler_show(struct hyp_sysfs_attr attr, char buffer)
152	{
153	int ret = -ENOMEM;
154	struct xen_compile_info *info;
155
156	info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL);
157	if (info) {
158	ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
159	if (!ret)
160	ret = sprintf(buffer, "%s\n", info->compiler);
161	kfree(info);
162	}
163
164	return ret;
165	}
166
167	HYPERVISOR_ATTR_RO(compiler);
168
169	static ssize_t compiled_by_show(struct hyp_sysfs_attr attr, char buffer)
170	{
171	int ret = -ENOMEM;
172	struct xen_compile_info *info;
173
174	info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL);
175	if (info) {
176	ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
177	if (!ret)
178	ret = sprintf(buffer, "%s\n", info->compile_by);
179	kfree(info);
180	}
181
182	return ret;
183	}
184
185	HYPERVISOR_ATTR_RO(compiled_by);
186
187	static ssize_t compile_date_show(struct hyp_sysfs_attr attr, char buffer)
188	{
189	int ret = -ENOMEM;
190	struct xen_compile_info *info;
191
192	info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL);
193	if (info) {
194	ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
195	if (!ret)
196	ret = sprintf(buffer, "%s\n", info->compile_date);
197	kfree(info);
198	}
199
200	return ret;
201	}
202
203	HYPERVISOR_ATTR_RO(compile_date);
204
205	static struct attribute *xen_compile_attrs[] = {
206	&compiler_attr.attr,
207	&compiled_by_attr.attr,
208	&compile_date_attr.attr,
209	NULL
210	};
211
212	static struct attribute_group xen_compilation_group = {
213	.name = "compilation",
214	.attrs = xen_compile_attrs,
215	};
216
217	int __init static xen_compilation_init(void)
218	{
219	return sysfs_create_group(hypervisor_kobj, &xen_compilation_group);
220	}
221
222	static void xen_compilation_destroy(void)
223	{
224	sysfs_remove_group(hypervisor_kobj, &xen_compilation_group);
225	}
226
227	/* xen properties info */
228
229	static ssize_t capabilities_show(struct hyp_sysfs_attr attr, char buffer)
230	{
231	int ret = -ENOMEM;
232	char *caps;
233
234	caps = kmalloc(XEN_CAPABILITIES_INFO_LEN, GFP_KERNEL);
235	if (caps) {
236	ret = HYPERVISOR_xen_version(XENVER_capabilities, caps);
237	if (!ret)
238	ret = sprintf(buffer, "%s\n", caps);
239	kfree(caps);
240	}
241
242	return ret;
243	}
244
245	HYPERVISOR_ATTR_RO(capabilities);
246
247	static ssize_t changeset_show(struct hyp_sysfs_attr attr, char buffer)
248	{
249	int ret = -ENOMEM;
250	char *cset;
251
252	cset = kmalloc(XEN_CHANGESET_INFO_LEN, GFP_KERNEL);
253	if (cset) {
254	ret = HYPERVISOR_xen_version(XENVER_changeset, cset);
255	if (!ret)
256	ret = sprintf(buffer, "%s\n", cset);
257	kfree(cset);
258	}
259
260	return ret;
261	}
262
263	HYPERVISOR_ATTR_RO(changeset);
264
265	static ssize_t virtual_start_show(struct hyp_sysfs_attr attr, char buffer)
266	{
267	int ret = -ENOMEM;
268	struct xen_platform_parameters *parms;
269
270	parms = kmalloc(sizeof(struct xen_platform_parameters), GFP_KERNEL);
271	if (parms) {
272	ret = HYPERVISOR_xen_version(XENVER_platform_parameters,
273	parms);
274	if (!ret)
275	ret = sprintf(buffer, "%lx\n", parms->virt_start);
276	kfree(parms);
277	}
278
279	return ret;
280	}
281
282	HYPERVISOR_ATTR_RO(virtual_start);
283
284	static ssize_t pagesize_show(struct hyp_sysfs_attr attr, char buffer)
285	{
286	int ret;
287
288	ret = HYPERVISOR_xen_version(XENVER_pagesize, NULL);
289	if (ret > 0)
290	ret = sprintf(buffer, "%x\n", ret);
291
292	return ret;
293	}
294
295	HYPERVISOR_ATTR_RO(pagesize);
296
cff7e81b JF	297	static ssize_t xen_feature_show(int index, char *buffer)
cff7e81b JF	298	{
a649b720 JF	299	ssize_t ret;
a649b720 JF	300	struct xen_feature_info info;
cff7e81b	301
a649b720 JF	302	info.submap_idx = index;
	303	ret = HYPERVISOR_xen_version(XENVER_get_features, &info);
	304	if (!ret)
	305	ret = sprintf(buffer, "%08x", info.submap);
cff7e81b JF	306
	307	return ret;
	308	}
	309
a649b720	310	static ssize_t features_show(struct hyp_sysfs_attr attr, char buffer)
cff7e81b	311	{
a649b720 JF	312	ssize_t len;
	313	int i;
	314
	315	len = 0;
	316	for (i = XENFEAT_NR_SUBMAPS-1; i >= 0; i--) {
	317	int ret = xen_feature_show(i, buffer + len);
	318	if (ret < 0) {
	319	if (len == 0)
	320	len = ret;
	321	break;
	322	}
	323	len += ret;
	324	}
	325	if (len > 0)
	326	buffer[len++] = '\n';
	327
	328	return len;
cff7e81b JF	329	}
cff7e81b JF	330
a649b720	331	HYPERVISOR_ATTR_RO(features);
cff7e81b JF	332
	333	static struct attribute *xen_properties_attrs[] = {
	334	&capabilities_attr.attr,
	335	&changeset_attr.attr,
	336	&virtual_start_attr.attr,
	337	&pagesize_attr.attr,
a649b720	338	&features_attr.attr,
cff7e81b JF	339	NULL
	340	};
	341
	342	static struct attribute_group xen_properties_group = {
	343	.name = "properties",
	344	.attrs = xen_properties_attrs,
	345	};
	346
	347	static int __init xen_properties_init(void)
	348	{
	349	return sysfs_create_group(hypervisor_kobj, &xen_properties_group);
	350	}
	351
	352	static void xen_properties_destroy(void)
	353	{
	354	sysfs_remove_group(hypervisor_kobj, &xen_properties_group);
	355	}
	356
cff7e81b JF	357	static int __init hyper_sysfs_init(void)
	358	{
	359	int ret;
	360
	361	if (!xen_domain())
	362	return -ENODEV;
	363
	364	ret = xen_sysfs_type_init();
	365	if (ret)
	366	goto out;
	367	ret = xen_sysfs_version_init();
	368	if (ret)
	369	goto version_out;
	370	ret = xen_compilation_init();
	371	if (ret)
	372	goto comp_out;
	373	ret = xen_sysfs_uuid_init();
	374	if (ret)
	375	goto uuid_out;
	376	ret = xen_properties_init();
	377	if (ret)
	378	goto prop_out;
cff7e81b JF	379
	380	goto out;
	381
cff7e81b JF	382	prop_out:
	383	xen_sysfs_uuid_destroy();
	384	uuid_out:
	385	xen_compilation_destroy();
	386	comp_out:
	387	xen_sysfs_version_destroy();
	388	version_out:
	389	xen_sysfs_type_destroy();
	390	out:
	391	return ret;
	392	}
	393
	394	static void __exit hyper_sysfs_exit(void)
	395	{
cff7e81b JF	396	xen_properties_destroy();
	397	xen_compilation_destroy();
	398	xen_sysfs_uuid_destroy();
	399	xen_sysfs_version_destroy();
	400	xen_sysfs_type_destroy();
	401
	402	}
	403	module_init(hyper_sysfs_init);
	404	module_exit(hyper_sysfs_exit);
	405
	406	static ssize_t hyp_sysfs_show(struct kobject *kobj,
	407	struct attribute *attr,
	408	char *buffer)
	409	{
	410	struct hyp_sysfs_attr *hyp_attr;
	411	hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr);
	412	if (hyp_attr->show)
	413	return hyp_attr->show(hyp_attr, buffer);
	414	return 0;
	415	}
	416
	417	static ssize_t hyp_sysfs_store(struct kobject *kobj,
	418	struct attribute *attr,
	419	const char *buffer,
	420	size_t len)
	421	{
	422	struct hyp_sysfs_attr *hyp_attr;
	423	hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr);
	424	if (hyp_attr->store)
	425	return hyp_attr->store(hyp_attr, buffer, len);
	426	return 0;
	427	}
	428
	429	static struct sysfs_ops hyp_sysfs_ops = {
	430	.show = hyp_sysfs_show,
	431	.store = hyp_sysfs_store,
	432	};
	433
	434	static struct kobj_type hyp_sysfs_kobj_type = {
	435	.sysfs_ops = &hyp_sysfs_ops,
	436	};
	437
	438	static int __init hypervisor_subsys_init(void)
	439	{
	440	if (!xen_domain())
	441	return -ENODEV;
	442
	443	hypervisor_kobj->ktype = &hyp_sysfs_kobj_type;
	444	return 0;
	445	}
	446	device_initcall(hypervisor_subsys_init);