[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/init.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);
}

/* 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);
}

/* 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);
}

/* 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);
}

/* 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);
}

#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);
}
#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) {
			sysfs_remove_group(hypervisor_kobj,
					   &xen_properties_group);
			goto prop_out;
		}
	}
#endif
	goto out;

prop_out:
	sysfs_remove_file(hypervisor_kobj, &uuid_attr.attr);
uuid_out:
	sysfs_remove_group(hypervisor_kobj, &xen_compilation_group);
comp_out:
	sysfs_remove_group(hypervisor_kobj, &version_group);
version_out:
	sysfs_remove_file(hypervisor_kobj, &type_attr.attr);
out:
	return ret;
}
device_initcall(hyper_sysfs_init);

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	11	#include <linux/kernel.h>
46894f17	12	#include <linux/init.h>
cff7e81b	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
cff7e81b JF	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
ead1d014	99	static const struct attribute_group version_group = {
cff7e81b JF	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
cff7e81b JF	109	/* UUID */
cff7e81b JF	110
5c13f806	111	static ssize_t uuid_show_fallback(struct hyp_sysfs_attr attr, char buffer)
cff7e81b JF	112	{
	113	char vm, val;
	114	int ret;
	115	extern int xenstored_ready;
	116
	117	if (!xenstored_ready)
	118	return -EBUSY;
	119
	120	vm = xenbus_read(XBT_NIL, "vm", "", NULL);
	121	if (IS_ERR(vm))
	122	return PTR_ERR(vm);
	123	val = xenbus_read(XBT_NIL, vm, "uuid", NULL);
	124	kfree(vm);
	125	if (IS_ERR(val))
	126	return PTR_ERR(val);
	127	ret = sprintf(buffer, "%s\n", val);
	128	kfree(val);
	129	return ret;
	130	}
	131
5c13f806 DDG	132	static ssize_t uuid_show(struct hyp_sysfs_attr attr, char buffer)
	133	{
	134	xen_domain_handle_t uuid;
	135	int ret;
	136	ret = HYPERVISOR_xen_version(XENVER_guest_handle, uuid);
	137	if (ret)
	138	return uuid_show_fallback(attr, buffer);
	139	ret = sprintf(buffer, "%pU\n", uuid);
	140	return ret;
	141	}
	142
cff7e81b JF	143	HYPERVISOR_ATTR_RO(uuid);
	144
	145	static int __init xen_sysfs_uuid_init(void)
	146	{
	147	return sysfs_create_file(hypervisor_kobj, &uuid_attr.attr);
	148	}
	149
cff7e81b JF	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
ead1d014	213	static const struct attribute_group xen_compilation_group = {
cff7e81b JF	214	.name = "compilation",
	215	.attrs = xen_compile_attrs,
	216	};
	217
887cb456	218	static int __init xen_compilation_init(void)
cff7e81b JF	219	{
	220	return sysfs_create_group(hypervisor_kobj, &xen_compilation_group);
	221	}
	222
cff7e81b JF	223	/* xen properties info */
	224
	225	static ssize_t capabilities_show(struct hyp_sysfs_attr attr, char buffer)
	226	{
	227	int ret = -ENOMEM;
	228	char *caps;
	229
	230	caps = kmalloc(XEN_CAPABILITIES_INFO_LEN, GFP_KERNEL);
	231	if (caps) {
	232	ret = HYPERVISOR_xen_version(XENVER_capabilities, caps);
	233	if (!ret)
	234	ret = sprintf(buffer, "%s\n", caps);
	235	kfree(caps);
	236	}
	237
	238	return ret;
	239	}
	240
	241	HYPERVISOR_ATTR_RO(capabilities);
	242
	243	static ssize_t changeset_show(struct hyp_sysfs_attr attr, char buffer)
	244	{
	245	int ret = -ENOMEM;
	246	char *cset;
	247
	248	cset = kmalloc(XEN_CHANGESET_INFO_LEN, GFP_KERNEL);
	249	if (cset) {
	250	ret = HYPERVISOR_xen_version(XENVER_changeset, cset);
	251	if (!ret)
	252	ret = sprintf(buffer, "%s\n", cset);
	253	kfree(cset);
	254	}
	255
	256	return ret;
	257	}
	258
	259	HYPERVISOR_ATTR_RO(changeset);
	260
	261	static ssize_t virtual_start_show(struct hyp_sysfs_attr attr, char buffer)
	262	{
	263	int ret = -ENOMEM;
	264	struct xen_platform_parameters *parms;
	265
	266	parms = kmalloc(sizeof(struct xen_platform_parameters), GFP_KERNEL);
	267	if (parms) {
	268	ret = HYPERVISOR_xen_version(XENVER_platform_parameters,
	269	parms);
	270	if (!ret)
37ea0fcb IC	271	ret = sprintf(buffer, "%"PRI_xen_ulong"\n",
37ea0fcb IC	272	parms->virt_start);
cff7e81b JF	273	kfree(parms);
	274	}
	275
	276	return ret;
	277	}
	278
	279	HYPERVISOR_ATTR_RO(virtual_start);
	280
	281	static ssize_t pagesize_show(struct hyp_sysfs_attr attr, char buffer)
	282	{
	283	int ret;
	284
	285	ret = HYPERVISOR_xen_version(XENVER_pagesize, NULL);
	286	if (ret > 0)
	287	ret = sprintf(buffer, "%x\n", ret);
	288
	289	return ret;
	290	}
	291
	292	HYPERVISOR_ATTR_RO(pagesize);
	293
cff7e81b JF	294	static ssize_t xen_feature_show(int index, char *buffer)
cff7e81b JF	295	{
a649b720 JF	296	ssize_t ret;
a649b720 JF	297	struct xen_feature_info info;
cff7e81b	298
a649b720 JF	299	info.submap_idx = index;
	300	ret = HYPERVISOR_xen_version(XENVER_get_features, &info);
	301	if (!ret)
	302	ret = sprintf(buffer, "%08x", info.submap);
cff7e81b JF	303
	304	return ret;
	305	}
	306
a649b720	307	static ssize_t features_show(struct hyp_sysfs_attr attr, char buffer)
cff7e81b	308	{
a649b720 JF	309	ssize_t len;
	310	int i;
	311
	312	len = 0;
	313	for (i = XENFEAT_NR_SUBMAPS-1; i >= 0; i--) {
	314	int ret = xen_feature_show(i, buffer + len);
	315	if (ret < 0) {
	316	if (len == 0)
	317	len = ret;
	318	break;
	319	}
	320	len += ret;
	321	}
	322	if (len > 0)
	323	buffer[len++] = '\n';
	324
	325	return len;
cff7e81b JF	326	}
cff7e81b JF	327
a649b720	328	HYPERVISOR_ATTR_RO(features);
cff7e81b JF	329
	330	static struct attribute *xen_properties_attrs[] = {
	331	&capabilities_attr.attr,
	332	&changeset_attr.attr,
	333	&virtual_start_attr.attr,
	334	&pagesize_attr.attr,
a649b720	335	&features_attr.attr,
cff7e81b JF	336	NULL
	337	};
	338
ead1d014	339	static const struct attribute_group xen_properties_group = {
cff7e81b JF	340	.name = "properties",
	341	.attrs = xen_properties_attrs,
	342	};
	343
	344	static int __init xen_properties_init(void)
	345	{
	346	return sysfs_create_group(hypervisor_kobj, &xen_properties_group);
	347	}
	348
5f141548 BO	349	#ifdef CONFIG_XEN_HAVE_VPMU
	350	struct pmu_mode {
	351	const char *name;
	352	uint32_t mode;
	353	};
	354
	355	static struct pmu_mode pmu_modes[] = {
	356	{"off", XENPMU_MODE_OFF},
	357	{"self", XENPMU_MODE_SELF},
	358	{"hv", XENPMU_MODE_HV},
	359	{"all", XENPMU_MODE_ALL}
	360	};
	361
	362	static ssize_t pmu_mode_store(struct hyp_sysfs_attr *attr,
	363	const char *buffer, size_t len)
	364	{
	365	int ret;
	366	struct xen_pmu_params xp;
	367	int i;
	368
	369	for (i = 0; i < ARRAY_SIZE(pmu_modes); i++) {
	370	if (strncmp(buffer, pmu_modes[i].name, len - 1) == 0) {
	371	xp.val = pmu_modes[i].mode;
	372	break;
	373	}
	374	}
	375
	376	if (i == ARRAY_SIZE(pmu_modes))
	377	return -EINVAL;
	378
	379	xp.version.maj = XENPMU_VER_MAJ;
	380	xp.version.min = XENPMU_VER_MIN;
	381	ret = HYPERVISOR_xenpmu_op(XENPMU_mode_set, &xp);
	382	if (ret)
	383	return ret;
	384
	385	return len;
	386	}
	387
	388	static ssize_t pmu_mode_show(struct hyp_sysfs_attr attr, char buffer)
	389	{
	390	int ret;
	391	struct xen_pmu_params xp;
	392	int i;
	393	uint32_t mode;
	394
	395	xp.version.maj = XENPMU_VER_MAJ;
	396	xp.version.min = XENPMU_VER_MIN;
	397	ret = HYPERVISOR_xenpmu_op(XENPMU_mode_get, &xp);
	398	if (ret)
	399	return ret;
	400
	401	mode = (uint32_t)xp.val;
	402	for (i = 0; i < ARRAY_SIZE(pmu_modes); i++) {
	403	if (mode == pmu_modes[i].mode)
	404	return sprintf(buffer, "%s\n", pmu_modes[i].name);
	405	}
	406
	407	return -EINVAL;
	408	}
	409	HYPERVISOR_ATTR_RW(pmu_mode);
	410
	411	static ssize_t pmu_features_store(struct hyp_sysfs_attr *attr,
	412	const char *buffer, size_t len)
413	{
414	int ret;
415	uint32_t features;
416	struct xen_pmu_params xp;
417
418	ret = kstrtou32(buffer, 0, &features);
419	if (ret)
420	return ret;
421
422	xp.val = features;
423	xp.version.maj = XENPMU_VER_MAJ;
424	xp.version.min = XENPMU_VER_MIN;
425	ret = HYPERVISOR_xenpmu_op(XENPMU_feature_set, &xp);
426	if (ret)
427	return ret;
428
429	return len;
430	}
431
432	static ssize_t pmu_features_show(struct hyp_sysfs_attr attr, char buffer)
433	{
434	int ret;
435	struct xen_pmu_params xp;
436
437	xp.version.maj = XENPMU_VER_MAJ;
438	xp.version.min = XENPMU_VER_MIN;
439	ret = HYPERVISOR_xenpmu_op(XENPMU_feature_get, &xp);
440	if (ret)
441	return ret;
442
443	return sprintf(buffer, "0x%x\n", (uint32_t)xp.val);
444	}
445	HYPERVISOR_ATTR_RW(pmu_features);
446
447	static struct attribute *xen_pmu_attrs[] = {
448	&pmu_mode_attr.attr,
449	&pmu_features_attr.attr,
450	NULL
451	};
452
453	static const struct attribute_group xen_pmu_group = {
454	.name = "pmu",
455	.attrs = xen_pmu_attrs,
456	};
457
458	static int __init xen_pmu_init(void)
459	{
460	return sysfs_create_group(hypervisor_kobj, &xen_pmu_group);
461	}
5f141548 BO	462	#endif
5f141548 BO	463
cff7e81b JF	464	static int __init hyper_sysfs_init(void)
	465	{
	466	int ret;
	467
	468	if (!xen_domain())
	469	return -ENODEV;
	470
	471	ret = xen_sysfs_type_init();
	472	if (ret)
	473	goto out;
	474	ret = xen_sysfs_version_init();
	475	if (ret)
	476	goto version_out;
	477	ret = xen_compilation_init();
	478	if (ret)
	479	goto comp_out;
	480	ret = xen_sysfs_uuid_init();
	481	if (ret)
	482	goto uuid_out;
	483	ret = xen_properties_init();
	484	if (ret)
	485	goto prop_out;
5f141548 BO	486	#ifdef CONFIG_XEN_HAVE_VPMU
	487	if (xen_initial_domain()) {
	488	ret = xen_pmu_init();
	489	if (ret) {
46894f17 PG	490	sysfs_remove_group(hypervisor_kobj,
46894f17 PG	491	&xen_properties_group);
5f141548 BO	492	goto prop_out;
	493	}
	494	}
	495	#endif
cff7e81b JF	496	goto out;
cff7e81b JF	497
cff7e81b	498	prop_out:
46894f17	499	sysfs_remove_file(hypervisor_kobj, &uuid_attr.attr);
cff7e81b	500	uuid_out:
46894f17	501	sysfs_remove_group(hypervisor_kobj, &xen_compilation_group);
cff7e81b	502	comp_out:
46894f17	503	sysfs_remove_group(hypervisor_kobj, &version_group);
cff7e81b	504	version_out:
46894f17	505	sysfs_remove_file(hypervisor_kobj, &type_attr.attr);
cff7e81b JF	506	out:
	507	return ret;
	508	}
46894f17	509	device_initcall(hyper_sysfs_init);
cff7e81b JF	510
	511	static ssize_t hyp_sysfs_show(struct kobject *kobj,
	512	struct attribute *attr,
	513	char *buffer)
	514	{
	515	struct hyp_sysfs_attr *hyp_attr;
	516	hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr);
	517	if (hyp_attr->show)
	518	return hyp_attr->show(hyp_attr, buffer);
	519	return 0;
	520	}
	521
	522	static ssize_t hyp_sysfs_store(struct kobject *kobj,
	523	struct attribute *attr,
	524	const char *buffer,
	525	size_t len)
	526	{
	527	struct hyp_sysfs_attr *hyp_attr;
	528	hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr);
	529	if (hyp_attr->store)
	530	return hyp_attr->store(hyp_attr, buffer, len);
	531	return 0;
	532	}
	533
52cf25d0	534	static const struct sysfs_ops hyp_sysfs_ops = {
cff7e81b JF	535	.show = hyp_sysfs_show,
	536	.store = hyp_sysfs_store,
	537	};
	538
	539	static struct kobj_type hyp_sysfs_kobj_type = {
	540	.sysfs_ops = &hyp_sysfs_ops,
	541	};
	542
	543	static int __init hypervisor_subsys_init(void)
	544	{
	545	if (!xen_domain())
	546	return -ENODEV;
	547
	548	hypervisor_kobj->ktype = &hyp_sysfs_kobj_type;
	549	return 0;
	550	}
	551	device_initcall(hypervisor_subsys_init);