[GitHub/mt8127/android_kernel_alcatel_ttab.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 <linux/err.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, "%"PRI_xen_ulong"\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>
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>
	23
	24	#define HYPERVISOR_ATTR_RO(_name) \
	25	static struct hyp_sysfs_attr _name##_attr = __ATTR_RO(_name)
	26
	27	#define HYPERVISOR_ATTR_RW(_name) \
	28	static struct hyp_sysfs_attr _name##_attr = \
	29	__ATTR(_name, 0644, _name##_show, _name##_store)
	30
	31	struct 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
	38	static ssize_t type_show(struct hyp_sysfs_attr attr, char buffer)
	39	{
	40	return sprintf(buffer, "xen\n");
	41	}
	42
	43	HYPERVISOR_ATTR_RO(type);
	44
	45	static int __init xen_sysfs_type_init(void)
	46	{
	47	return sysfs_create_file(hypervisor_kobj, &type_attr.attr);
	48	}
	49
	50	static void xen_sysfs_type_destroy(void)
	51	{
	52	sysfs_remove_file(hypervisor_kobj, &type_attr.attr);
	53	}
	54
	55	/* xen version attributes */
	56	static ssize_t major_show(struct hyp_sysfs_attr attr, char buffer)
	57	{
	58	int version = HYPERVISOR_xen_version(XENVER_version, NULL);
	59	if (version)
	60	return sprintf(buffer, "%d\n", version >> 16);
	61	return -ENODEV;
	62	}
	63
	64	HYPERVISOR_ATTR_RO(major);
	65
	66	static ssize_t minor_show(struct hyp_sysfs_attr attr, char buffer)
	67	{
	68	int version = HYPERVISOR_xen_version(XENVER_version, NULL);
	69	if (version)
	70	return sprintf(buffer, "%d\n", version & 0xff);
	71	return -ENODEV;
	72	}
	73
	74	HYPERVISOR_ATTR_RO(minor);
	75
	76	static ssize_t extra_show(struct hyp_sysfs_attr attr, char buffer)
	77	{
	78	int ret = -ENOMEM;
	79	char *extra;
	80
	81	extra = kmalloc(XEN_EXTRAVERSION_LEN, GFP_KERNEL);
	82	if (extra) {
	83	ret = HYPERVISOR_xen_version(XENVER_extraversion, extra);
84	if (!ret)
85	ret = sprintf(buffer, "%s\n", extra);
86	kfree(extra);
87	}
88
89	return ret;
90	}
91
92	HYPERVISOR_ATTR_RO(extra);
93
94	static struct attribute *version_attrs[] = {
95	&major_attr.attr,
96	&minor_attr.attr,
97	&extra_attr.attr,
98	NULL
99	};
100
ead1d014	101	static const struct attribute_group version_group = {
cff7e81b JF	102	.name = "version",
	103	.attrs = version_attrs,
	104	};
	105
	106	static int __init xen_sysfs_version_init(void)
	107	{
	108	return sysfs_create_group(hypervisor_kobj, &version_group);
	109	}
	110
	111	static void xen_sysfs_version_destroy(void)
	112	{
	113	sysfs_remove_group(hypervisor_kobj, &version_group);
	114	}
	115
	116	/* UUID */
	117
5c13f806	118	static ssize_t uuid_show_fallback(struct hyp_sysfs_attr attr, char buffer)
cff7e81b JF	119	{
	120	char vm, val;
	121	int ret;
	122	extern int xenstored_ready;
	123
	124	if (!xenstored_ready)
	125	return -EBUSY;
	126
	127	vm = xenbus_read(XBT_NIL, "vm", "", NULL);
	128	if (IS_ERR(vm))
	129	return PTR_ERR(vm);
	130	val = xenbus_read(XBT_NIL, vm, "uuid", NULL);
	131	kfree(vm);
	132	if (IS_ERR(val))
	133	return PTR_ERR(val);
	134	ret = sprintf(buffer, "%s\n", val);
	135	kfree(val);
	136	return ret;
	137	}
	138
5c13f806 DDG	139	static ssize_t uuid_show(struct hyp_sysfs_attr attr, char buffer)
	140	{
	141	xen_domain_handle_t uuid;
	142	int ret;
	143	ret = HYPERVISOR_xen_version(XENVER_guest_handle, uuid);
	144	if (ret)
	145	return uuid_show_fallback(attr, buffer);
	146	ret = sprintf(buffer, "%pU\n", uuid);
	147	return ret;
	148	}
	149
cff7e81b JF	150	HYPERVISOR_ATTR_RO(uuid);
	151
	152	static int __init xen_sysfs_uuid_init(void)
	153	{
	154	return sysfs_create_file(hypervisor_kobj, &uuid_attr.attr);
	155	}
	156
	157	static void xen_sysfs_uuid_destroy(void)
	158	{
	159	sysfs_remove_file(hypervisor_kobj, &uuid_attr.attr);
	160	}
	161
	162	/* xen compilation attributes */
	163
	164	static ssize_t compiler_show(struct hyp_sysfs_attr attr, char buffer)
	165	{
	166	int ret = -ENOMEM;
	167	struct xen_compile_info *info;
	168
	169	info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL);
	170	if (info) {
	171	ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
	172	if (!ret)
	173	ret = sprintf(buffer, "%s\n", info->compiler);
	174	kfree(info);
	175	}
	176
	177	return ret;
	178	}
	179
	180	HYPERVISOR_ATTR_RO(compiler);
	181
	182	static ssize_t compiled_by_show(struct hyp_sysfs_attr attr, char buffer)
	183	{
	184	int ret = -ENOMEM;
	185	struct xen_compile_info *info;
	186
	187	info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL);
	188	if (info) {
	189	ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
	190	if (!ret)
	191	ret = sprintf(buffer, "%s\n", info->compile_by);
	192	kfree(info);
	193	}
	194
	195	return ret;
	196	}
	197
	198	HYPERVISOR_ATTR_RO(compiled_by);
	199
	200	static ssize_t compile_date_show(struct hyp_sysfs_attr attr, char buffer)
	201	{
	202	int ret = -ENOMEM;
	203	struct xen_compile_info *info;
	204
	205	info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL);
	206	if (info) {
	207	ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
	208	if (!ret)
	209	ret = sprintf(buffer, "%s\n", info->compile_date);
	210	kfree(info);
	211	}
	212
	213	return ret;
214	}
215
216	HYPERVISOR_ATTR_RO(compile_date);
217
218	static struct attribute *xen_compile_attrs[] = {
219	&compiler_attr.attr,
220	&compiled_by_attr.attr,
221	&compile_date_attr.attr,
222	NULL
223	};
224
ead1d014	225	static const struct attribute_group xen_compilation_group = {
cff7e81b JF	226	.name = "compilation",
	227	.attrs = xen_compile_attrs,
	228	};
	229
887cb456	230	static int __init xen_compilation_init(void)
cff7e81b JF	231	{
	232	return sysfs_create_group(hypervisor_kobj, &xen_compilation_group);
	233	}
	234
	235	static void xen_compilation_destroy(void)
	236	{
	237	sysfs_remove_group(hypervisor_kobj, &xen_compilation_group);
	238	}
	239
	240	/* xen properties info */
	241
	242	static ssize_t capabilities_show(struct hyp_sysfs_attr attr, char buffer)
	243	{
	244	int ret = -ENOMEM;
	245	char *caps;
	246
	247	caps = kmalloc(XEN_CAPABILITIES_INFO_LEN, GFP_KERNEL);
	248	if (caps) {
	249	ret = HYPERVISOR_xen_version(XENVER_capabilities, caps);
	250	if (!ret)
	251	ret = sprintf(buffer, "%s\n", caps);
	252	kfree(caps);
	253	}
	254
	255	return ret;
	256	}
	257
	258	HYPERVISOR_ATTR_RO(capabilities);
	259
	260	static ssize_t changeset_show(struct hyp_sysfs_attr attr, char buffer)
	261	{
	262	int ret = -ENOMEM;
	263	char *cset;
	264
	265	cset = kmalloc(XEN_CHANGESET_INFO_LEN, GFP_KERNEL);
	266	if (cset) {
	267	ret = HYPERVISOR_xen_version(XENVER_changeset, cset);
	268	if (!ret)
	269	ret = sprintf(buffer, "%s\n", cset);
	270	kfree(cset);
	271	}
	272
	273	return ret;
	274	}
	275
	276	HYPERVISOR_ATTR_RO(changeset);
	277
	278	static ssize_t virtual_start_show(struct hyp_sysfs_attr attr, char buffer)
	279	{
	280	int ret = -ENOMEM;
	281	struct xen_platform_parameters *parms;
	282
	283	parms = kmalloc(sizeof(struct xen_platform_parameters), GFP_KERNEL);
	284	if (parms) {
	285	ret = HYPERVISOR_xen_version(XENVER_platform_parameters,
	286	parms);
	287	if (!ret)
37ea0fcb IC	288	ret = sprintf(buffer, "%"PRI_xen_ulong"\n",
37ea0fcb IC	289	parms->virt_start);
cff7e81b JF	290	kfree(parms);
	291	}
	292
	293	return ret;
	294	}
	295
	296	HYPERVISOR_ATTR_RO(virtual_start);
	297
	298	static ssize_t pagesize_show(struct hyp_sysfs_attr attr, char buffer)
	299	{
	300	int ret;
	301
	302	ret = HYPERVISOR_xen_version(XENVER_pagesize, NULL);
	303	if (ret > 0)
	304	ret = sprintf(buffer, "%x\n", ret);
	305
	306	return ret;
	307	}
	308
	309	HYPERVISOR_ATTR_RO(pagesize);
	310
cff7e81b JF	311	static ssize_t xen_feature_show(int index, char *buffer)
cff7e81b JF	312	{
a649b720 JF	313	ssize_t ret;
a649b720 JF	314	struct xen_feature_info info;
cff7e81b	315
a649b720 JF	316	info.submap_idx = index;
	317	ret = HYPERVISOR_xen_version(XENVER_get_features, &info);
	318	if (!ret)
	319	ret = sprintf(buffer, "%08x", info.submap);
cff7e81b JF	320
	321	return ret;
	322	}
	323
a649b720	324	static ssize_t features_show(struct hyp_sysfs_attr attr, char buffer)
cff7e81b	325	{
a649b720 JF	326	ssize_t len;
	327	int i;
	328
	329	len = 0;
	330	for (i = XENFEAT_NR_SUBMAPS-1; i >= 0; i--) {
	331	int ret = xen_feature_show(i, buffer + len);
	332	if (ret < 0) {
	333	if (len == 0)
	334	len = ret;
	335	break;
	336	}
	337	len += ret;
	338	}
	339	if (len > 0)
	340	buffer[len++] = '\n';
	341
	342	return len;
cff7e81b JF	343	}
cff7e81b JF	344
a649b720	345	HYPERVISOR_ATTR_RO(features);
cff7e81b JF	346
	347	static struct attribute *xen_properties_attrs[] = {
	348	&capabilities_attr.attr,
	349	&changeset_attr.attr,
	350	&virtual_start_attr.attr,
	351	&pagesize_attr.attr,
a649b720	352	&features_attr.attr,
cff7e81b JF	353	NULL
	354	};
	355
ead1d014	356	static const struct attribute_group xen_properties_group = {
cff7e81b JF	357	.name = "properties",
	358	.attrs = xen_properties_attrs,
	359	};
	360
	361	static int __init xen_properties_init(void)
	362	{
	363	return sysfs_create_group(hypervisor_kobj, &xen_properties_group);
	364	}
	365
	366	static void xen_properties_destroy(void)
	367	{
	368	sysfs_remove_group(hypervisor_kobj, &xen_properties_group);
	369	}
	370
cff7e81b JF	371	static int __init hyper_sysfs_init(void)
	372	{
	373	int ret;
	374
	375	if (!xen_domain())
	376	return -ENODEV;
	377
	378	ret = xen_sysfs_type_init();
	379	if (ret)
	380	goto out;
	381	ret = xen_sysfs_version_init();
	382	if (ret)
	383	goto version_out;
	384	ret = xen_compilation_init();
	385	if (ret)
	386	goto comp_out;
	387	ret = xen_sysfs_uuid_init();
	388	if (ret)
	389	goto uuid_out;
	390	ret = xen_properties_init();
	391	if (ret)
	392	goto prop_out;
cff7e81b JF	393
	394	goto out;
	395
cff7e81b JF	396	prop_out:
	397	xen_sysfs_uuid_destroy();
	398	uuid_out:
	399	xen_compilation_destroy();
	400	comp_out:
	401	xen_sysfs_version_destroy();
	402	version_out:
	403	xen_sysfs_type_destroy();
	404	out:
	405	return ret;
	406	}
	407
	408	static void __exit hyper_sysfs_exit(void)
	409	{
cff7e81b JF	410	xen_properties_destroy();
	411	xen_compilation_destroy();
	412	xen_sysfs_uuid_destroy();
	413	xen_sysfs_version_destroy();
	414	xen_sysfs_type_destroy();
	415
	416	}
	417	module_init(hyper_sysfs_init);
	418	module_exit(hyper_sysfs_exit);
	419
	420	static ssize_t hyp_sysfs_show(struct kobject *kobj,
	421	struct attribute *attr,
	422	char *buffer)
	423	{
	424	struct hyp_sysfs_attr *hyp_attr;
	425	hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr);
	426	if (hyp_attr->show)
	427	return hyp_attr->show(hyp_attr, buffer);
	428	return 0;
	429	}
	430
	431	static ssize_t hyp_sysfs_store(struct kobject *kobj,
	432	struct attribute *attr,
	433	const char *buffer,
	434	size_t len)
	435	{
	436	struct hyp_sysfs_attr *hyp_attr;
	437	hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr);
	438	if (hyp_attr->store)
	439	return hyp_attr->store(hyp_attr, buffer, len);
	440	return 0;
	441	}
	442
52cf25d0	443	static const struct sysfs_ops hyp_sysfs_ops = {
cff7e81b JF	444	.show = hyp_sysfs_show,
	445	.store = hyp_sysfs_store,
	446	};
	447
	448	static struct kobj_type hyp_sysfs_kobj_type = {
	449	.sysfs_ops = &hyp_sysfs_ops,
	450	};
	451
	452	static int __init hypervisor_subsys_init(void)
	453	{
	454	if (!xen_domain())
	455	return -ENODEV;
	456
	457	hypervisor_kobj->ktype = &hyp_sysfs_kobj_type;
	458	return 0;
	459	}
	460	device_initcall(hypervisor_subsys_init);