[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/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>
#ifdef CONFIG_XEN_HAVE_VPMU
#include <xen/interface/xenpmu.h>
#endif

#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);
}

#ifdef CONFIG_XEN_HAVE_VPMU
struct pmu_mode {
	const char *name;
	uint32_t mode;
};

static struct pmu_mode pmu_modes[] = {
	{"off", XENPMU_MODE_OFF},
	{"self", XENPMU_MODE_SELF},
	{"hv", XENPMU_MODE_HV},
	{"all", XENPMU_MODE_ALL}
};

static ssize_t pmu_mode_store(struct hyp_sysfs_attr *attr,
			      const char *buffer, size_t len)
{
	int ret;
	struct xen_pmu_params xp;
	int i;

	for (i = 0; i < ARRAY_SIZE(pmu_modes); i++) {
		if (strncmp(buffer, pmu_modes[i].name, len - 1) == 0) {
			xp.val = pmu_modes[i].mode;
			break;
		}
	}

	if (i == ARRAY_SIZE(pmu_modes))
		return -EINVAL;

	xp.version.maj = XENPMU_VER_MAJ;
	xp.version.min = XENPMU_VER_MIN;
	ret = HYPERVISOR_xenpmu_op(XENPMU_mode_set, &xp);
	if (ret)
		return ret;

	return len;
}

static ssize_t pmu_mode_show(struct hyp_sysfs_attr *attr, char *buffer)
{
	int ret;
	struct xen_pmu_params xp;
	int i;
	uint32_t mode;

	xp.version.maj = XENPMU_VER_MAJ;
	xp.version.min = XENPMU_VER_MIN;
	ret = HYPERVISOR_xenpmu_op(XENPMU_mode_get, &xp);
	if (ret)
		return ret;

	mode = (uint32_t)xp.val;
	for (i = 0; i < ARRAY_SIZE(pmu_modes); i++) {
		if (mode == pmu_modes[i].mode)
			return sprintf(buffer, "%s\n", pmu_modes[i].name);
	}

	return -EINVAL;
}
HYPERVISOR_ATTR_RW(pmu_mode);

static ssize_t pmu_features_store(struct hyp_sysfs_attr *attr,
				  const char *buffer, size_t len)
{
	int ret;
	uint32_t features;
	struct xen_pmu_params xp;

	ret = kstrtou32(buffer, 0, &features);
	if (ret)
		return ret;

	xp.val = features;
	xp.version.maj = XENPMU_VER_MAJ;
	xp.version.min = XENPMU_VER_MIN;
	ret = HYPERVISOR_xenpmu_op(XENPMU_feature_set, &xp);
	if (ret)
		return ret;

	return len;
}

static ssize_t pmu_features_show(struct hyp_sysfs_attr *attr, char *buffer)
{
	int ret;
	struct xen_pmu_params xp;

	xp.version.maj = XENPMU_VER_MAJ;
	xp.version.min = XENPMU_VER_MIN;
	ret = HYPERVISOR_xenpmu_op(XENPMU_feature_get, &xp);
	if (ret)
		return ret;

	return sprintf(buffer, "0x%x\n", (uint32_t)xp.val);
}
HYPERVISOR_ATTR_RW(pmu_features);

static struct attribute *xen_pmu_attrs[] = {
	&pmu_mode_attr.attr,
	&pmu_features_attr.attr,
	NULL
};

static const struct attribute_group xen_pmu_group = {
	.name = "pmu",
	.attrs = xen_pmu_attrs,
};

static int __init xen_pmu_init(void)
{
	return sysfs_create_group(hypervisor_kobj, &xen_pmu_group);
}

static void xen_pmu_destroy(void)
{
	sysfs_remove_group(hypervisor_kobj, &xen_pmu_group);
}
#endif

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;
#ifdef CONFIG_XEN_HAVE_VPMU
	if (xen_initial_domain()) {
		ret = xen_pmu_init();
		if (ret) {
			xen_properties_destroy();
			goto prop_out;
		}
	}
#endif
	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)
{
#ifdef CONFIG_XEN_HAVE_VPMU
	xen_pmu_destroy();
#endif
	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>
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",
37ea0fcb IC	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)
cff7e81b JF	315	{
a649b720 JF	316	ssize_t ret;
a649b720 JF	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	}
cff7e81b JF	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;
cff7e81b JF	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);