[net-next-2.6.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/slab.h>
#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 const 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
5a0e3ad6	10	#include <linux/slab.h>
cff7e81b JF	11	#include <linux/kernel.h>
	12	#include <linux/module.h>
	13	#include <linux/kobject.h>
	14
	15	#include <asm/xen/hypervisor.h>
	16	#include <asm/xen/hypercall.h>
	17
1ccbf534	18	#include <xen/xen.h>
cff7e81b JF	19	#include <xen/xenbus.h>
	20	#include <xen/interface/xen.h>
	21	#include <xen/interface/version.h>
	22
	23	#define HYPERVISOR_ATTR_RO(_name) \
	24	static struct hyp_sysfs_attr _name##_attr = __ATTR_RO(_name)
	25
	26	#define HYPERVISOR_ATTR_RW(_name) \
	27	static struct hyp_sysfs_attr _name##_attr = \
	28	__ATTR(_name, 0644, _name##_show, _name##_store)
	29
	30	struct hyp_sysfs_attr {
	31	struct attribute attr;
	32	ssize_t (show)(struct hyp_sysfs_attr , char *);
	33	ssize_t (store)(struct hyp_sysfs_attr , const char *, size_t);
	34	void *hyp_attr_data;
	35	};
	36
	37	static ssize_t type_show(struct hyp_sysfs_attr attr, char buffer)
	38	{
	39	return sprintf(buffer, "xen\n");
	40	}
	41
	42	HYPERVISOR_ATTR_RO(type);
	43
	44	static int __init xen_sysfs_type_init(void)
	45	{
	46	return sysfs_create_file(hypervisor_kobj, &type_attr.attr);
	47	}
	48
	49	static void xen_sysfs_type_destroy(void)
	50	{
	51	sysfs_remove_file(hypervisor_kobj, &type_attr.attr);
	52	}
	53
	54	/* xen version attributes */
	55	static ssize_t major_show(struct hyp_sysfs_attr attr, char buffer)
	56	{
	57	int version = HYPERVISOR_xen_version(XENVER_version, NULL);
	58	if (version)
	59	return sprintf(buffer, "%d\n", version >> 16);
	60	return -ENODEV;
	61	}
	62
	63	HYPERVISOR_ATTR_RO(major);
	64
	65	static ssize_t minor_show(struct hyp_sysfs_attr attr, char buffer)
	66	{
	67	int version = HYPERVISOR_xen_version(XENVER_version, NULL);
	68	if (version)
	69	return sprintf(buffer, "%d\n", version & 0xff);
	70	return -ENODEV;
	71	}
	72
	73	HYPERVISOR_ATTR_RO(minor);
	74
	75	static ssize_t extra_show(struct hyp_sysfs_attr attr, char buffer)
	76	{
	77	int ret = -ENOMEM;
	78	char *extra;
	79
	80	extra = kmalloc(XEN_EXTRAVERSION_LEN, GFP_KERNEL);
	81	if (extra) {
	82	ret = HYPERVISOR_xen_version(XENVER_extraversion, extra);
83	if (!ret)
84	ret = sprintf(buffer, "%s\n", extra);
85	kfree(extra);
86	}
87
88	return ret;
89	}
90
91	HYPERVISOR_ATTR_RO(extra);
92
93	static struct attribute *version_attrs[] = {
94	&major_attr.attr,
95	&minor_attr.attr,
96	&extra_attr.attr,
97	NULL
98	};
99
100	static struct attribute_group version_group = {
101	.name = "version",
102	.attrs = version_attrs,
103	};
104
105	static int __init xen_sysfs_version_init(void)
106	{
107	return sysfs_create_group(hypervisor_kobj, &version_group);
108	}
109
110	static void xen_sysfs_version_destroy(void)
111	{
112	sysfs_remove_group(hypervisor_kobj, &version_group);
113	}
114
115	/* UUID */
116
117	static ssize_t uuid_show(struct hyp_sysfs_attr attr, char buffer)
118	{
119	char vm, val;
120	int ret;
121	extern int xenstored_ready;
122
123	if (!xenstored_ready)
124	return -EBUSY;
125
126	vm = xenbus_read(XBT_NIL, "vm", "", NULL);
127	if (IS_ERR(vm))
128	return PTR_ERR(vm);
129	val = xenbus_read(XBT_NIL, vm, "uuid", NULL);
130	kfree(vm);
131	if (IS_ERR(val))
132	return PTR_ERR(val);
133	ret = sprintf(buffer, "%s\n", val);
134	kfree(val);
135	return ret;
136	}
137
138	HYPERVISOR_ATTR_RO(uuid);
139
140	static int __init xen_sysfs_uuid_init(void)
141	{
142	return sysfs_create_file(hypervisor_kobj, &uuid_attr.attr);
143	}
144
145	static void xen_sysfs_uuid_destroy(void)
146	{
147	sysfs_remove_file(hypervisor_kobj, &uuid_attr.attr);
148	}
149
150	/* xen compilation attributes */
151
152	static 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
168	HYPERVISOR_ATTR_RO(compiler);
169
170	static 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
186	HYPERVISOR_ATTR_RO(compiled_by);
187
188	static 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
204	HYPERVISOR_ATTR_RO(compile_date);
205
206	static struct attribute *xen_compile_attrs[] = {
207	&compiler_attr.attr,
208	&compiled_by_attr.attr,
209	&compile_date_attr.attr,
210	NULL
211	};
212
213	static struct attribute_group xen_compilation_group = {
214	.name = "compilation",
215	.attrs = xen_compile_attrs,
216	};
217
218	int __init static xen_compilation_init(void)
219	{
220	return sysfs_create_group(hypervisor_kobj, &xen_compilation_group);
221	}
222
223	static void xen_compilation_destroy(void)
224	{
225	sysfs_remove_group(hypervisor_kobj, &xen_compilation_group);
226	}
227
228	/* xen properties info */
229
230	static ssize_t capabilities_show(struct hyp_sysfs_attr attr, char buffer)
231	{
232	int ret = -ENOMEM;
233	char *caps;
234
235	caps = kmalloc(XEN_CAPABILITIES_INFO_LEN, GFP_KERNEL);
236	if (caps) {
237	ret = HYPERVISOR_xen_version(XENVER_capabilities, caps);
238	if (!ret)
239	ret = sprintf(buffer, "%s\n", caps);
240	kfree(caps);
241	}
242
243	return ret;
244	}
245
246	HYPERVISOR_ATTR_RO(capabilities);
247
248	static ssize_t changeset_show(struct hyp_sysfs_attr attr, char buffer)
249	{
250	int ret = -ENOMEM;
251	char *cset;
252
253	cset = kmalloc(XEN_CHANGESET_INFO_LEN, GFP_KERNEL);
254	if (cset) {
255	ret = HYPERVISOR_xen_version(XENVER_changeset, cset);
256	if (!ret)
257	ret = sprintf(buffer, "%s\n", cset);
258	kfree(cset);
259	}
260
261	return ret;
262	}
263
264	HYPERVISOR_ATTR_RO(changeset);
265
266	static ssize_t virtual_start_show(struct hyp_sysfs_attr attr, char buffer)
267	{
268	int ret = -ENOMEM;
269	struct xen_platform_parameters *parms;
270
271	parms = kmalloc(sizeof(struct xen_platform_parameters), GFP_KERNEL);
272	if (parms) {
273	ret = HYPERVISOR_xen_version(XENVER_platform_parameters,
274	parms);
275	if (!ret)
276	ret = sprintf(buffer, "%lx\n", parms->virt_start);
277	kfree(parms);
278	}
279
280	return ret;
281	}
282
283	HYPERVISOR_ATTR_RO(virtual_start);
284
285	static ssize_t pagesize_show(struct hyp_sysfs_attr attr, char buffer)
286	{
287	int ret;
288
289	ret = HYPERVISOR_xen_version(XENVER_pagesize, NULL);
290	if (ret > 0)
291	ret = sprintf(buffer, "%x\n", ret);
292
293	return ret;
294	}
295
296	HYPERVISOR_ATTR_RO(pagesize);
297
cff7e81b JF	298	static ssize_t xen_feature_show(int index, char *buffer)
cff7e81b JF	299	{
a649b720 JF	300	ssize_t ret;
a649b720 JF	301	struct xen_feature_info info;
cff7e81b	302
a649b720 JF	303	info.submap_idx = index;
	304	ret = HYPERVISOR_xen_version(XENVER_get_features, &info);
	305	if (!ret)
	306	ret = sprintf(buffer, "%08x", info.submap);
cff7e81b JF	307
	308	return ret;
	309	}
	310
a649b720	311	static ssize_t features_show(struct hyp_sysfs_attr attr, char buffer)
cff7e81b	312	{
a649b720 JF	313	ssize_t len;
	314	int i;
	315
	316	len = 0;
	317	for (i = XENFEAT_NR_SUBMAPS-1; i >= 0; i--) {
	318	int ret = xen_feature_show(i, buffer + len);
	319	if (ret < 0) {
	320	if (len == 0)
	321	len = ret;
	322	break;
	323	}
	324	len += ret;
	325	}
	326	if (len > 0)
	327	buffer[len++] = '\n';
	328
	329	return len;
cff7e81b JF	330	}
cff7e81b JF	331
a649b720	332	HYPERVISOR_ATTR_RO(features);
cff7e81b JF	333
	334	static struct attribute *xen_properties_attrs[] = {
	335	&capabilities_attr.attr,
	336	&changeset_attr.attr,
	337	&virtual_start_attr.attr,
	338	&pagesize_attr.attr,
a649b720	339	&features_attr.attr,
cff7e81b JF	340	NULL
	341	};
	342
	343	static struct attribute_group xen_properties_group = {
	344	.name = "properties",
	345	.attrs = xen_properties_attrs,
	346	};
	347
	348	static int __init xen_properties_init(void)
	349	{
	350	return sysfs_create_group(hypervisor_kobj, &xen_properties_group);
	351	}
	352
	353	static void xen_properties_destroy(void)
	354	{
	355	sysfs_remove_group(hypervisor_kobj, &xen_properties_group);
	356	}
	357
cff7e81b JF	358	static int __init hyper_sysfs_init(void)
	359	{
	360	int ret;
	361
	362	if (!xen_domain())
	363	return -ENODEV;
	364
	365	ret = xen_sysfs_type_init();
	366	if (ret)
	367	goto out;
	368	ret = xen_sysfs_version_init();
	369	if (ret)
	370	goto version_out;
	371	ret = xen_compilation_init();
	372	if (ret)
	373	goto comp_out;
	374	ret = xen_sysfs_uuid_init();
	375	if (ret)
	376	goto uuid_out;
	377	ret = xen_properties_init();
	378	if (ret)
	379	goto prop_out;
cff7e81b JF	380
	381	goto out;
	382
cff7e81b JF	383	prop_out:
	384	xen_sysfs_uuid_destroy();
	385	uuid_out:
	386	xen_compilation_destroy();
	387	comp_out:
	388	xen_sysfs_version_destroy();
	389	version_out:
	390	xen_sysfs_type_destroy();
	391	out:
	392	return ret;
	393	}
	394
	395	static void __exit hyper_sysfs_exit(void)
	396	{
cff7e81b JF	397	xen_properties_destroy();
	398	xen_compilation_destroy();
	399	xen_sysfs_uuid_destroy();
	400	xen_sysfs_version_destroy();
	401	xen_sysfs_type_destroy();
	402
	403	}
	404	module_init(hyper_sysfs_init);
	405	module_exit(hyper_sysfs_exit);
	406
	407	static ssize_t hyp_sysfs_show(struct kobject *kobj,
	408	struct attribute *attr,
	409	char *buffer)
	410	{
	411	struct hyp_sysfs_attr *hyp_attr;
	412	hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr);
	413	if (hyp_attr->show)
	414	return hyp_attr->show(hyp_attr, buffer);
	415	return 0;
	416	}
	417
	418	static ssize_t hyp_sysfs_store(struct kobject *kobj,
	419	struct attribute *attr,
	420	const char *buffer,
	421	size_t len)
	422	{
	423	struct hyp_sysfs_attr *hyp_attr;
	424	hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr);
	425	if (hyp_attr->store)
	426	return hyp_attr->store(hyp_attr, buffer, len);
	427	return 0;
	428	}
	429
52cf25d0	430	static const struct sysfs_ops hyp_sysfs_ops = {
cff7e81b JF	431	.show = hyp_sysfs_show,
	432	.store = hyp_sysfs_store,
	433	};
	434
	435	static struct kobj_type hyp_sysfs_kobj_type = {
	436	.sysfs_ops = &hyp_sysfs_ops,
	437	};
	438
	439	static int __init hypervisor_subsys_init(void)
	440	{
	441	if (!xen_domain())
	442	return -ENODEV;
	443
	444	hypervisor_kobj->ktype = &hyp_sysfs_kobj_type;
	445	return 0;
	446	}
	447	device_initcall(hypervisor_subsys_init);