[linux-block.git] / drivers / xen / sys-hypervisor.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 *  copyright (c) 2006 IBM Corporation
 *  Authored by: Mike D. Day <ncmike@us.ibm.com>
 */

#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_RW(_name)

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 ssize_t guest_type_show(struct hyp_sysfs_attr *attr, char *buffer)
{
	const char *type;

	switch (xen_domain_type) {
	case XEN_NATIVE:
		/* ARM only. */
		type = "Xen";
		break;
	case XEN_PV_DOMAIN:
		type = "PV";
		break;
	case XEN_HVM_DOMAIN:
		type = xen_pvh_domain() ? "PVH" : "HVM";
		break;
	default:
		return -EINVAL;
	}

	return sprintf(buffer, "%s\n", type);
}

HYPERVISOR_ATTR_RO(guest_type);

static int __init xen_sysfs_guest_type_init(void)
{
	return sysfs_create_file(hypervisor_kobj, &guest_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_sysfs_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 ssize_t buildid_show(struct hyp_sysfs_attr *attr, char *buffer)
{
	ssize_t ret;
	struct xen_build_id *buildid;

	ret = HYPERVISOR_xen_version(XENVER_build_id, NULL);
	if (ret < 0) {
		if (ret == -EPERM)
			ret = sprintf(buffer, "<denied>");
		return ret;
	}

	buildid = kmalloc(sizeof(*buildid) + ret, GFP_KERNEL);
	if (!buildid)
		return -ENOMEM;

	buildid->len = ret;
	ret = HYPERVISOR_xen_version(XENVER_build_id, buildid);
	if (ret > 0)
		ret = sprintf(buffer, "%s", buildid->buf);
	kfree(buildid);

	return ret;
}

HYPERVISOR_ATTR_RO(buildid);

static struct attribute *xen_properties_attrs[] = {
	&capabilities_attr.attr,
	&changeset_attr.attr,
	&virtual_start_attr.attr,
	&pagesize_attr.attr,
	&features_attr.attr,
	&buildid_attr.attr,
	NULL
};

static const struct attribute_group xen_properties_group = {
	.name = "properties",
	.attrs = xen_properties_attrs,
};

static int __init xen_sysfs_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_sysfs_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_guest_type_init();
	if (ret)
		goto guest_type_out;
	ret = xen_sysfs_version_init();
	if (ret)
		goto version_out;
	ret = xen_sysfs_compilation_init();
	if (ret)
		goto comp_out;
	ret = xen_sysfs_uuid_init();
	if (ret)
		goto uuid_out;
	ret = xen_sysfs_properties_init();
	if (ret)
		goto prop_out;
#ifdef CONFIG_XEN_HAVE_VPMU
	if (xen_initial_domain()) {
		ret = xen_sysfs_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, &guest_type_attr.attr);
guest_type_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
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
cff7e81b JF	2	/*
	3	* copyright (c) 2006 IBM Corporation
	4	* Authored by: Mike D. Day <ncmike@us.ibm.com>
cff7e81b JF	5	*/
cff7e81b JF	6
5a0e3ad6	7	#include <linux/slab.h>
cff7e81b	8	#include <linux/kernel.h>
46894f17	9	#include <linux/init.h>
cff7e81b	10	#include <linux/kobject.h>
609b0b8c	11	#include <linux/err.h>
cff7e81b JF	12
	13	#include <asm/xen/hypervisor.h>
	14	#include <asm/xen/hypercall.h>
	15
1ccbf534	16	#include <xen/xen.h>
cff7e81b JF	17	#include <xen/xenbus.h>
	18	#include <xen/interface/xen.h>
	19	#include <xen/interface/version.h>
5f141548 BO	20	#ifdef CONFIG_XEN_HAVE_VPMU
	21	#include <xen/interface/xenpmu.h>
	22	#endif
cff7e81b JF	23
cff7e81b JF	24	#define HYPERVISOR_ATTR_RO(_name) \
982e4430	25	static struct hyp_sysfs_attr _name##_attr = __ATTR_RO(_name)
cff7e81b JF	26
cff7e81b JF	27	#define HYPERVISOR_ATTR_RW(_name) \
982e4430	28	static struct hyp_sysfs_attr _name##_attr = __ATTR_RW(_name)
cff7e81b JF	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
4a4c29c9 JG	49	static ssize_t guest_type_show(struct hyp_sysfs_attr attr, char buffer)
	50	{
	51	const char *type;
	52
	53	switch (xen_domain_type) {
	54	case XEN_NATIVE:
	55	/* ARM only. */
	56	type = "Xen";
	57	break;
	58	case XEN_PV_DOMAIN:
	59	type = "PV";
	60	break;
	61	case XEN_HVM_DOMAIN:
	62	type = xen_pvh_domain() ? "PVH" : "HVM";
	63	break;
	64	default:
	65	return -EINVAL;
	66	}
	67
	68	return sprintf(buffer, "%s\n", type);
	69	}
	70
	71	HYPERVISOR_ATTR_RO(guest_type);
	72
	73	static int __init xen_sysfs_guest_type_init(void)
	74	{
	75	return sysfs_create_file(hypervisor_kobj, &guest_type_attr.attr);
	76	}
	77
cff7e81b JF	78	/* xen version attributes */
	79	static ssize_t major_show(struct hyp_sysfs_attr attr, char buffer)
	80	{
	81	int version = HYPERVISOR_xen_version(XENVER_version, NULL);
	82	if (version)
	83	return sprintf(buffer, "%d\n", version >> 16);
	84	return -ENODEV;
	85	}
	86
	87	HYPERVISOR_ATTR_RO(major);
	88
	89	static ssize_t minor_show(struct hyp_sysfs_attr attr, char buffer)
	90	{
	91	int version = HYPERVISOR_xen_version(XENVER_version, NULL);
	92	if (version)
	93	return sprintf(buffer, "%d\n", version & 0xff);
	94	return -ENODEV;
	95	}
	96
	97	HYPERVISOR_ATTR_RO(minor);
	98
	99	static ssize_t extra_show(struct hyp_sysfs_attr attr, char buffer)
	100	{
	101	int ret = -ENOMEM;
	102	char *extra;
	103
	104	extra = kmalloc(XEN_EXTRAVERSION_LEN, GFP_KERNEL);
	105	if (extra) {
	106	ret = HYPERVISOR_xen_version(XENVER_extraversion, extra);
	107	if (!ret)
	108	ret = sprintf(buffer, "%s\n", extra);
	109	kfree(extra);
	110	}
	111
	112	return ret;
	113	}
	114
	115	HYPERVISOR_ATTR_RO(extra);
	116
	117	static struct attribute *version_attrs[] = {
	118	&major_attr.attr,
	119	&minor_attr.attr,
	120	&extra_attr.attr,
	121	NULL
	122	};
	123
ead1d014	124	static const struct attribute_group version_group = {
cff7e81b JF	125	.name = "version",
	126	.attrs = version_attrs,
	127	};
	128
	129	static int __init xen_sysfs_version_init(void)
	130	{
	131	return sysfs_create_group(hypervisor_kobj, &version_group);
	132	}
	133
cff7e81b JF	134	/* UUID */
cff7e81b JF	135
5c13f806	136	static ssize_t uuid_show_fallback(struct hyp_sysfs_attr attr, char buffer)
cff7e81b JF	137	{
	138	char vm, val;
	139	int ret;
	140	extern int xenstored_ready;
	141
	142	if (!xenstored_ready)
	143	return -EBUSY;
	144
	145	vm = xenbus_read(XBT_NIL, "vm", "", NULL);
	146	if (IS_ERR(vm))
	147	return PTR_ERR(vm);
	148	val = xenbus_read(XBT_NIL, vm, "uuid", NULL);
	149	kfree(vm);
	150	if (IS_ERR(val))
	151	return PTR_ERR(val);
	152	ret = sprintf(buffer, "%s\n", val);
	153	kfree(val);
	154	return ret;
	155	}
	156
5c13f806 DDG	157	static ssize_t uuid_show(struct hyp_sysfs_attr attr, char buffer)
	158	{
	159	xen_domain_handle_t uuid;
	160	int ret;
	161	ret = HYPERVISOR_xen_version(XENVER_guest_handle, uuid);
	162	if (ret)
	163	return uuid_show_fallback(attr, buffer);
	164	ret = sprintf(buffer, "%pU\n", uuid);
	165	return ret;
	166	}
	167
cff7e81b JF	168	HYPERVISOR_ATTR_RO(uuid);
	169
	170	static int __init xen_sysfs_uuid_init(void)
	171	{
	172	return sysfs_create_file(hypervisor_kobj, &uuid_attr.attr);
	173	}
	174
cff7e81b JF	175	/* xen compilation attributes */
	176
	177	static ssize_t compiler_show(struct hyp_sysfs_attr attr, char buffer)
	178	{
	179	int ret = -ENOMEM;
	180	struct xen_compile_info *info;
	181
	182	info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL);
	183	if (info) {
	184	ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
	185	if (!ret)
	186	ret = sprintf(buffer, "%s\n", info->compiler);
	187	kfree(info);
	188	}
	189
	190	return ret;
	191	}
	192
	193	HYPERVISOR_ATTR_RO(compiler);
	194
	195	static ssize_t compiled_by_show(struct hyp_sysfs_attr attr, char buffer)
	196	{
	197	int ret = -ENOMEM;
	198	struct xen_compile_info *info;
	199
	200	info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL);
	201	if (info) {
	202	ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
	203	if (!ret)
	204	ret = sprintf(buffer, "%s\n", info->compile_by);
	205	kfree(info);
	206	}
	207
	208	return ret;
	209	}
	210
	211	HYPERVISOR_ATTR_RO(compiled_by);
	212
	213	static ssize_t compile_date_show(struct hyp_sysfs_attr attr, char buffer)
	214	{
	215	int ret = -ENOMEM;
	216	struct xen_compile_info *info;
	217
	218	info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL);
	219	if (info) {
	220	ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
	221	if (!ret)
	222	ret = sprintf(buffer, "%s\n", info->compile_date);
	223	kfree(info);
	224	}
	225
	226	return ret;
	227	}
	228
	229	HYPERVISOR_ATTR_RO(compile_date);
	230
	231	static struct attribute *xen_compile_attrs[] = {
	232	&compiler_attr.attr,
	233	&compiled_by_attr.attr,
	234	&compile_date_attr.attr,
	235	NULL
	236	};
	237
ead1d014	238	static const struct attribute_group xen_compilation_group = {
cff7e81b JF	239	.name = "compilation",
	240	.attrs = xen_compile_attrs,
	241	};
	242
5b00b504	243	static int __init xen_sysfs_compilation_init(void)
cff7e81b JF	244	{
	245	return sysfs_create_group(hypervisor_kobj, &xen_compilation_group);
	246	}
	247
cff7e81b JF	248	/* xen properties info */
	249
	250	static ssize_t capabilities_show(struct hyp_sysfs_attr attr, char buffer)
	251	{
	252	int ret = -ENOMEM;
	253	char *caps;
	254
	255	caps = kmalloc(XEN_CAPABILITIES_INFO_LEN, GFP_KERNEL);
	256	if (caps) {
	257	ret = HYPERVISOR_xen_version(XENVER_capabilities, caps);
	258	if (!ret)
	259	ret = sprintf(buffer, "%s\n", caps);
	260	kfree(caps);
	261	}
	262
	263	return ret;
	264	}
	265
	266	HYPERVISOR_ATTR_RO(capabilities);
	267
	268	static ssize_t changeset_show(struct hyp_sysfs_attr attr, char buffer)
	269	{
	270	int ret = -ENOMEM;
	271	char *cset;
	272
	273	cset = kmalloc(XEN_CHANGESET_INFO_LEN, GFP_KERNEL);
	274	if (cset) {
	275	ret = HYPERVISOR_xen_version(XENVER_changeset, cset);
	276	if (!ret)
	277	ret = sprintf(buffer, "%s\n", cset);
	278	kfree(cset);
	279	}
	280
	281	return ret;
	282	}
	283
	284	HYPERVISOR_ATTR_RO(changeset);
	285
	286	static ssize_t virtual_start_show(struct hyp_sysfs_attr attr, char buffer)
	287	{
	288	int ret = -ENOMEM;
	289	struct xen_platform_parameters *parms;
	290
	291	parms = kmalloc(sizeof(struct xen_platform_parameters), GFP_KERNEL);
	292	if (parms) {
	293	ret = HYPERVISOR_xen_version(XENVER_platform_parameters,
	294	parms);
	295	if (!ret)
37ea0fcb IC	296	ret = sprintf(buffer, "%"PRI_xen_ulong"\n",
37ea0fcb IC	297	parms->virt_start);
cff7e81b JF	298	kfree(parms);
	299	}
	300
	301	return ret;
	302	}
	303
	304	HYPERVISOR_ATTR_RO(virtual_start);
	305
	306	static ssize_t pagesize_show(struct hyp_sysfs_attr attr, char buffer)
	307	{
	308	int ret;
	309
	310	ret = HYPERVISOR_xen_version(XENVER_pagesize, NULL);
	311	if (ret > 0)
	312	ret = sprintf(buffer, "%x\n", ret);
	313
	314	return ret;
	315	}
	316
	317	HYPERVISOR_ATTR_RO(pagesize);
	318
cff7e81b JF	319	static ssize_t xen_feature_show(int index, char *buffer)
cff7e81b JF	320	{
a649b720 JF	321	ssize_t ret;
a649b720 JF	322	struct xen_feature_info info;
cff7e81b	323
a649b720 JF	324	info.submap_idx = index;
	325	ret = HYPERVISOR_xen_version(XENVER_get_features, &info);
	326	if (!ret)
	327	ret = sprintf(buffer, "%08x", info.submap);
cff7e81b JF	328
	329	return ret;
	330	}
	331
a649b720	332	static ssize_t features_show(struct hyp_sysfs_attr attr, char buffer)
cff7e81b	333	{
a649b720 JF	334	ssize_t len;
	335	int i;
	336
	337	len = 0;
	338	for (i = XENFEAT_NR_SUBMAPS-1; i >= 0; i--) {
	339	int ret = xen_feature_show(i, buffer + len);
	340	if (ret < 0) {
	341	if (len == 0)
	342	len = ret;
	343	break;
	344	}
	345	len += ret;
	346	}
	347	if (len > 0)
	348	buffer[len++] = '\n';
	349
	350	return len;
cff7e81b JF	351	}
cff7e81b JF	352
a649b720	353	HYPERVISOR_ATTR_RO(features);
cff7e81b	354
84b76257 JG	355	static ssize_t buildid_show(struct hyp_sysfs_attr attr, char buffer)
	356	{
	357	ssize_t ret;
	358	struct xen_build_id *buildid;
	359
	360	ret = HYPERVISOR_xen_version(XENVER_build_id, NULL);
	361	if (ret < 0) {
	362	if (ret == -EPERM)
	363	ret = sprintf(buffer, "<denied>");
	364	return ret;
	365	}
	366
	367	buildid = kmalloc(sizeof(*buildid) + ret, GFP_KERNEL);
	368	if (!buildid)
	369	return -ENOMEM;
	370
	371	buildid->len = ret;
	372	ret = HYPERVISOR_xen_version(XENVER_build_id, buildid);
	373	if (ret > 0)
	374	ret = sprintf(buffer, "%s", buildid->buf);
	375	kfree(buildid);
	376
	377	return ret;
	378	}
	379
	380	HYPERVISOR_ATTR_RO(buildid);
	381
cff7e81b JF	382	static struct attribute *xen_properties_attrs[] = {
	383	&capabilities_attr.attr,
	384	&changeset_attr.attr,
	385	&virtual_start_attr.attr,
	386	&pagesize_attr.attr,
a649b720	387	&features_attr.attr,
84b76257	388	&buildid_attr.attr,
cff7e81b JF	389	NULL
	390	};
	391
ead1d014	392	static const struct attribute_group xen_properties_group = {
cff7e81b JF	393	.name = "properties",
	394	.attrs = xen_properties_attrs,
	395	};
	396
5b00b504	397	static int __init xen_sysfs_properties_init(void)
cff7e81b JF	398	{
	399	return sysfs_create_group(hypervisor_kobj, &xen_properties_group);
	400	}
	401
5f141548 BO	402	#ifdef CONFIG_XEN_HAVE_VPMU
	403	struct pmu_mode {
	404	const char *name;
	405	uint32_t mode;
	406	};
	407
	408	static struct pmu_mode pmu_modes[] = {
	409	{"off", XENPMU_MODE_OFF},
	410	{"self", XENPMU_MODE_SELF},
	411	{"hv", XENPMU_MODE_HV},
	412	{"all", XENPMU_MODE_ALL}
	413	};
	414
	415	static ssize_t pmu_mode_store(struct hyp_sysfs_attr *attr,
	416	const char *buffer, size_t len)
	417	{
	418	int ret;
	419	struct xen_pmu_params xp;
	420	int i;
	421
	422	for (i = 0; i < ARRAY_SIZE(pmu_modes); i++) {
	423	if (strncmp(buffer, pmu_modes[i].name, len - 1) == 0) {
	424	xp.val = pmu_modes[i].mode;
	425	break;
	426	}
	427	}
	428
	429	if (i == ARRAY_SIZE(pmu_modes))
	430	return -EINVAL;
	431
	432	xp.version.maj = XENPMU_VER_MAJ;
	433	xp.version.min = XENPMU_VER_MIN;
	434	ret = HYPERVISOR_xenpmu_op(XENPMU_mode_set, &xp);
	435	if (ret)
	436	return ret;
	437
	438	return len;
	439	}
	440
	441	static ssize_t pmu_mode_show(struct hyp_sysfs_attr attr, char buffer)
	442	{
	443	int ret;
	444	struct xen_pmu_params xp;
	445	int i;
	446	uint32_t mode;
	447
	448	xp.version.maj = XENPMU_VER_MAJ;
	449	xp.version.min = XENPMU_VER_MIN;
	450	ret = HYPERVISOR_xenpmu_op(XENPMU_mode_get, &xp);
	451	if (ret)
	452	return ret;
	453
	454	mode = (uint32_t)xp.val;
	455	for (i = 0; i < ARRAY_SIZE(pmu_modes); i++) {
	456	if (mode == pmu_modes[i].mode)
	457	return sprintf(buffer, "%s\n", pmu_modes[i].name);
	458	}
	459
	460	return -EINVAL;
	461	}
	462	HYPERVISOR_ATTR_RW(pmu_mode);
	463
	464	static ssize_t pmu_features_store(struct hyp_sysfs_attr *attr,
	465	const char *buffer, size_t len)
466	{
467	int ret;
468	uint32_t features;
469	struct xen_pmu_params xp;
470
471	ret = kstrtou32(buffer, 0, &features);
472	if (ret)
473	return ret;
474
475	xp.val = features;
476	xp.version.maj = XENPMU_VER_MAJ;
477	xp.version.min = XENPMU_VER_MIN;
478	ret = HYPERVISOR_xenpmu_op(XENPMU_feature_set, &xp);
479	if (ret)
480	return ret;
481
482	return len;
483	}
484
485	static ssize_t pmu_features_show(struct hyp_sysfs_attr attr, char buffer)
486	{
487	int ret;
488	struct xen_pmu_params xp;
489
490	xp.version.maj = XENPMU_VER_MAJ;
491	xp.version.min = XENPMU_VER_MIN;
492	ret = HYPERVISOR_xenpmu_op(XENPMU_feature_get, &xp);
493	if (ret)
494	return ret;
495
496	return sprintf(buffer, "0x%x\n", (uint32_t)xp.val);
497	}
498	HYPERVISOR_ATTR_RW(pmu_features);
499
500	static struct attribute *xen_pmu_attrs[] = {
501	&pmu_mode_attr.attr,
502	&pmu_features_attr.attr,
503	NULL
504	};
505
506	static const struct attribute_group xen_pmu_group = {
507	.name = "pmu",
508	.attrs = xen_pmu_attrs,
509	};
510
5b00b504	511	static int __init xen_sysfs_pmu_init(void)
5f141548 BO	512	{
	513	return sysfs_create_group(hypervisor_kobj, &xen_pmu_group);
	514	}
5f141548 BO	515	#endif
5f141548 BO	516
cff7e81b JF	517	static int __init hyper_sysfs_init(void)
	518	{
	519	int ret;
	520
	521	if (!xen_domain())
	522	return -ENODEV;
	523
	524	ret = xen_sysfs_type_init();
	525	if (ret)
	526	goto out;
4a4c29c9 JG	527	ret = xen_sysfs_guest_type_init();
	528	if (ret)
	529	goto guest_type_out;
cff7e81b JF	530	ret = xen_sysfs_version_init();
	531	if (ret)
	532	goto version_out;
5b00b504	533	ret = xen_sysfs_compilation_init();
cff7e81b JF	534	if (ret)
	535	goto comp_out;
	536	ret = xen_sysfs_uuid_init();
	537	if (ret)
	538	goto uuid_out;
5b00b504	539	ret = xen_sysfs_properties_init();
cff7e81b JF	540	if (ret)
cff7e81b JF	541	goto prop_out;
5f141548 BO	542	#ifdef CONFIG_XEN_HAVE_VPMU
5f141548 BO	543	if (xen_initial_domain()) {
5b00b504	544	ret = xen_sysfs_pmu_init();
5f141548	545	if (ret) {
46894f17 PG	546	sysfs_remove_group(hypervisor_kobj,
46894f17 PG	547	&xen_properties_group);
5f141548 BO	548	goto prop_out;
	549	}
	550	}
	551	#endif
cff7e81b JF	552	goto out;
cff7e81b JF	553
cff7e81b	554	prop_out:
46894f17	555	sysfs_remove_file(hypervisor_kobj, &uuid_attr.attr);
cff7e81b	556	uuid_out:
46894f17	557	sysfs_remove_group(hypervisor_kobj, &xen_compilation_group);
cff7e81b	558	comp_out:
46894f17	559	sysfs_remove_group(hypervisor_kobj, &version_group);
cff7e81b	560	version_out:
4a4c29c9 JG	561	sysfs_remove_file(hypervisor_kobj, &guest_type_attr.attr);
4a4c29c9 JG	562	guest_type_out:
46894f17	563	sysfs_remove_file(hypervisor_kobj, &type_attr.attr);
cff7e81b JF	564	out:
	565	return ret;
	566	}
46894f17	567	device_initcall(hyper_sysfs_init);
cff7e81b JF	568
	569	static ssize_t hyp_sysfs_show(struct kobject *kobj,
	570	struct attribute *attr,
	571	char *buffer)
	572	{
	573	struct hyp_sysfs_attr *hyp_attr;
	574	hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr);
	575	if (hyp_attr->show)
	576	return hyp_attr->show(hyp_attr, buffer);
	577	return 0;
	578	}
	579
	580	static ssize_t hyp_sysfs_store(struct kobject *kobj,
	581	struct attribute *attr,
	582	const char *buffer,
	583	size_t len)
	584	{
	585	struct hyp_sysfs_attr *hyp_attr;
	586	hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr);
	587	if (hyp_attr->store)
	588	return hyp_attr->store(hyp_attr, buffer, len);
	589	return 0;
	590	}
	591
52cf25d0	592	static const struct sysfs_ops hyp_sysfs_ops = {
cff7e81b JF	593	.show = hyp_sysfs_show,
	594	.store = hyp_sysfs_store,
	595	};
	596
	597	static struct kobj_type hyp_sysfs_kobj_type = {
	598	.sysfs_ops = &hyp_sysfs_ops,
	599	};
	600
	601	static int __init hypervisor_subsys_init(void)
	602	{
	603	if (!xen_domain())
	604	return -ENODEV;
	605
	606	hypervisor_kobj->ktype = &hyp_sysfs_kobj_type;
	607	return 0;
	608	}
	609	device_initcall(hypervisor_subsys_init);