[deliverable/linux.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 const 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_fallback(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;
}

static ssize_t uuid_show(struct hyp_sysfs_attr *attr, char *buffer)
{
	xen_domain_handle_t uuid;
	int ret;
	ret = HYPERVISOR_xen_version(XENVER_guest_handle, uuid);
	if (ret)
		return uuid_show_fallback(attr, buffer);
	ret = sprintf(buffer, "%pU\n", uuid);
	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 const struct attribute_group xen_compilation_group = {
	.name = "compilation",
	.attrs = xen_compile_attrs,
};

static int __init 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 const 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
ead1d014	100	static const struct attribute_group version_group = {
cff7e81b JF	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
5c13f806	117	static ssize_t uuid_show_fallback(struct hyp_sysfs_attr attr, char buffer)
cff7e81b JF	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
5c13f806 DDG	138	static ssize_t uuid_show(struct hyp_sysfs_attr attr, char buffer)
	139	{
	140	xen_domain_handle_t uuid;
	141	int ret;
	142	ret = HYPERVISOR_xen_version(XENVER_guest_handle, uuid);
	143	if (ret)
	144	return uuid_show_fallback(attr, buffer);
	145	ret = sprintf(buffer, "%pU\n", uuid);
	146	return ret;
	147	}
	148
cff7e81b JF	149	HYPERVISOR_ATTR_RO(uuid);
	150
	151	static int __init xen_sysfs_uuid_init(void)
	152	{
	153	return sysfs_create_file(hypervisor_kobj, &uuid_attr.attr);
	154	}
	155
	156	static void xen_sysfs_uuid_destroy(void)
	157	{
	158	sysfs_remove_file(hypervisor_kobj, &uuid_attr.attr);
	159	}
	160
	161	/* xen compilation attributes */
	162
	163	static ssize_t compiler_show(struct hyp_sysfs_attr attr, char buffer)
	164	{
	165	int ret = -ENOMEM;
	166	struct xen_compile_info *info;
	167
	168	info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL);
	169	if (info) {
	170	ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
	171	if (!ret)
	172	ret = sprintf(buffer, "%s\n", info->compiler);
	173	kfree(info);
	174	}
	175
	176	return ret;
	177	}
	178
	179	HYPERVISOR_ATTR_RO(compiler);
	180
	181	static ssize_t compiled_by_show(struct hyp_sysfs_attr attr, char buffer)
	182	{
	183	int ret = -ENOMEM;
	184	struct xen_compile_info *info;
	185
	186	info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL);
	187	if (info) {
	188	ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
	189	if (!ret)
	190	ret = sprintf(buffer, "%s\n", info->compile_by);
	191	kfree(info);
	192	}
	193
	194	return ret;
	195	}
	196
	197	HYPERVISOR_ATTR_RO(compiled_by);
	198
	199	static ssize_t compile_date_show(struct hyp_sysfs_attr attr, char buffer)
	200	{
	201	int ret = -ENOMEM;
	202	struct xen_compile_info *info;
	203
	204	info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL);
	205	if (info) {
	206	ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
	207	if (!ret)
	208	ret = sprintf(buffer, "%s\n", info->compile_date);
	209	kfree(info);
	210	}
	211
	212	return ret;
213	}
214
215	HYPERVISOR_ATTR_RO(compile_date);
216
217	static struct attribute *xen_compile_attrs[] = {
218	&compiler_attr.attr,
219	&compiled_by_attr.attr,
220	&compile_date_attr.attr,
221	NULL
222	};
223
ead1d014	224	static const struct attribute_group xen_compilation_group = {
cff7e81b JF	225	.name = "compilation",
	226	.attrs = xen_compile_attrs,
	227	};
	228
887cb456	229	static int __init xen_compilation_init(void)
cff7e81b JF	230	{
	231	return sysfs_create_group(hypervisor_kobj, &xen_compilation_group);
	232	}
	233
	234	static void xen_compilation_destroy(void)
	235	{
	236	sysfs_remove_group(hypervisor_kobj, &xen_compilation_group);
	237	}
	238
	239	/* xen properties info */
	240
	241	static ssize_t capabilities_show(struct hyp_sysfs_attr attr, char buffer)
	242	{
	243	int ret = -ENOMEM;
	244	char *caps;
	245
	246	caps = kmalloc(XEN_CAPABILITIES_INFO_LEN, GFP_KERNEL);
	247	if (caps) {
	248	ret = HYPERVISOR_xen_version(XENVER_capabilities, caps);
	249	if (!ret)
	250	ret = sprintf(buffer, "%s\n", caps);
	251	kfree(caps);
	252	}
	253
	254	return ret;
	255	}
	256
	257	HYPERVISOR_ATTR_RO(capabilities);
	258
	259	static ssize_t changeset_show(struct hyp_sysfs_attr attr, char buffer)
	260	{
	261	int ret = -ENOMEM;
	262	char *cset;
	263
	264	cset = kmalloc(XEN_CHANGESET_INFO_LEN, GFP_KERNEL);
	265	if (cset) {
	266	ret = HYPERVISOR_xen_version(XENVER_changeset, cset);
	267	if (!ret)
	268	ret = sprintf(buffer, "%s\n", cset);
	269	kfree(cset);
	270	}
	271
	272	return ret;
	273	}
	274
	275	HYPERVISOR_ATTR_RO(changeset);
	276
	277	static ssize_t virtual_start_show(struct hyp_sysfs_attr attr, char buffer)
	278	{
	279	int ret = -ENOMEM;
	280	struct xen_platform_parameters *parms;
	281
	282	parms = kmalloc(sizeof(struct xen_platform_parameters), GFP_KERNEL);
	283	if (parms) {
	284	ret = HYPERVISOR_xen_version(XENVER_platform_parameters,
	285	parms);
	286	if (!ret)
	287	ret = sprintf(buffer, "%lx\n", parms->virt_start);
	288	kfree(parms);
	289	}
	290
	291	return ret;
	292	}
	293
294	HYPERVISOR_ATTR_RO(virtual_start);
295
296	static ssize_t pagesize_show(struct hyp_sysfs_attr attr, char buffer)
297	{
298	int ret;
299
300	ret = HYPERVISOR_xen_version(XENVER_pagesize, NULL);
301	if (ret > 0)
302	ret = sprintf(buffer, "%x\n", ret);
303
304	return ret;
305	}
306
307	HYPERVISOR_ATTR_RO(pagesize);
308
cff7e81b JF	309	static ssize_t xen_feature_show(int index, char *buffer)
cff7e81b JF	310	{
a649b720 JF	311	ssize_t ret;
a649b720 JF	312	struct xen_feature_info info;
cff7e81b	313
a649b720 JF	314	info.submap_idx = index;
	315	ret = HYPERVISOR_xen_version(XENVER_get_features, &info);
	316	if (!ret)
	317	ret = sprintf(buffer, "%08x", info.submap);
cff7e81b JF	318
	319	return ret;
	320	}
	321
a649b720	322	static ssize_t features_show(struct hyp_sysfs_attr attr, char buffer)
cff7e81b	323	{
a649b720 JF	324	ssize_t len;
	325	int i;
	326
	327	len = 0;
	328	for (i = XENFEAT_NR_SUBMAPS-1; i >= 0; i--) {
	329	int ret = xen_feature_show(i, buffer + len);
	330	if (ret < 0) {
	331	if (len == 0)
	332	len = ret;
	333	break;
	334	}
	335	len += ret;
	336	}
	337	if (len > 0)
	338	buffer[len++] = '\n';
	339
	340	return len;
cff7e81b JF	341	}
cff7e81b JF	342
a649b720	343	HYPERVISOR_ATTR_RO(features);
cff7e81b JF	344
	345	static struct attribute *xen_properties_attrs[] = {
	346	&capabilities_attr.attr,
	347	&changeset_attr.attr,
	348	&virtual_start_attr.attr,
	349	&pagesize_attr.attr,
a649b720	350	&features_attr.attr,
cff7e81b JF	351	NULL
	352	};
	353
ead1d014	354	static const struct attribute_group xen_properties_group = {
cff7e81b JF	355	.name = "properties",
	356	.attrs = xen_properties_attrs,
	357	};
	358
	359	static int __init xen_properties_init(void)
	360	{
	361	return sysfs_create_group(hypervisor_kobj, &xen_properties_group);
	362	}
	363
	364	static void xen_properties_destroy(void)
	365	{
	366	sysfs_remove_group(hypervisor_kobj, &xen_properties_group);
	367	}
	368
cff7e81b JF	369	static int __init hyper_sysfs_init(void)
	370	{
	371	int ret;
	372
	373	if (!xen_domain())
	374	return -ENODEV;
	375
	376	ret = xen_sysfs_type_init();
	377	if (ret)
	378	goto out;
	379	ret = xen_sysfs_version_init();
	380	if (ret)
	381	goto version_out;
	382	ret = xen_compilation_init();
	383	if (ret)
	384	goto comp_out;
	385	ret = xen_sysfs_uuid_init();
	386	if (ret)
	387	goto uuid_out;
	388	ret = xen_properties_init();
	389	if (ret)
	390	goto prop_out;
cff7e81b JF	391
	392	goto out;
	393
cff7e81b JF	394	prop_out:
	395	xen_sysfs_uuid_destroy();
	396	uuid_out:
	397	xen_compilation_destroy();
	398	comp_out:
	399	xen_sysfs_version_destroy();
	400	version_out:
	401	xen_sysfs_type_destroy();
	402	out:
	403	return ret;
	404	}
	405
	406	static void __exit hyper_sysfs_exit(void)
	407	{
cff7e81b JF	408	xen_properties_destroy();
	409	xen_compilation_destroy();
	410	xen_sysfs_uuid_destroy();
	411	xen_sysfs_version_destroy();
	412	xen_sysfs_type_destroy();
	413
	414	}
	415	module_init(hyper_sysfs_init);
	416	module_exit(hyper_sysfs_exit);
	417
	418	static ssize_t hyp_sysfs_show(struct kobject *kobj,
	419	struct attribute *attr,
	420	char *buffer)
	421	{
	422	struct hyp_sysfs_attr *hyp_attr;
	423	hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr);
	424	if (hyp_attr->show)
	425	return hyp_attr->show(hyp_attr, buffer);
	426	return 0;
	427	}
	428
	429	static ssize_t hyp_sysfs_store(struct kobject *kobj,
	430	struct attribute *attr,
	431	const char *buffer,
	432	size_t len)
	433	{
	434	struct hyp_sysfs_attr *hyp_attr;
	435	hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr);
	436	if (hyp_attr->store)
	437	return hyp_attr->store(hyp_attr, buffer, len);
	438	return 0;
	439	}
	440
52cf25d0	441	static const struct sysfs_ops hyp_sysfs_ops = {
cff7e81b JF	442	.show = hyp_sysfs_show,
	443	.store = hyp_sysfs_store,
	444	};
	445
	446	static struct kobj_type hyp_sysfs_kobj_type = {
	447	.sysfs_ops = &hyp_sysfs_ops,
	448	};
	449
	450	static int __init hypervisor_subsys_init(void)
	451	{
	452	if (!xen_domain())
	453	return -ENODEV;
	454
	455	hypervisor_kobj->ktype = &hyp_sysfs_kobj_type;
	456	return 0;
	457	}
	458	device_initcall(hypervisor_subsys_init);