[mirror_ubuntu-bionic-kernel.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);
}

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
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
4a4c29c9 JG	53	static ssize_t guest_type_show(struct hyp_sysfs_attr attr, char buffer)
	54	{
	55	const char *type;
	56
	57	switch (xen_domain_type) {
	58	case XEN_NATIVE:
	59	/* ARM only. */
	60	type = "Xen";
	61	break;
	62	case XEN_PV_DOMAIN:
	63	type = "PV";
	64	break;
	65	case XEN_HVM_DOMAIN:
	66	type = xen_pvh_domain() ? "PVH" : "HVM";
	67	break;
	68	default:
	69	return -EINVAL;
	70	}
	71
	72	return sprintf(buffer, "%s\n", type);
	73	}
	74
	75	HYPERVISOR_ATTR_RO(guest_type);
	76
	77	static int __init xen_sysfs_guest_type_init(void)
	78	{
	79	return sysfs_create_file(hypervisor_kobj, &guest_type_attr.attr);
	80	}
	81
cff7e81b JF	82	/* xen version attributes */
	83	static ssize_t major_show(struct hyp_sysfs_attr attr, char buffer)
	84	{
	85	int version = HYPERVISOR_xen_version(XENVER_version, NULL);
	86	if (version)
	87	return sprintf(buffer, "%d\n", version >> 16);
	88	return -ENODEV;
	89	}
	90
	91	HYPERVISOR_ATTR_RO(major);
	92
	93	static ssize_t minor_show(struct hyp_sysfs_attr attr, char buffer)
	94	{
	95	int version = HYPERVISOR_xen_version(XENVER_version, NULL);
	96	if (version)
	97	return sprintf(buffer, "%d\n", version & 0xff);
	98	return -ENODEV;
	99	}
	100
	101	HYPERVISOR_ATTR_RO(minor);
	102
	103	static ssize_t extra_show(struct hyp_sysfs_attr attr, char buffer)
	104	{
	105	int ret = -ENOMEM;
	106	char *extra;
	107
	108	extra = kmalloc(XEN_EXTRAVERSION_LEN, GFP_KERNEL);
	109	if (extra) {
	110	ret = HYPERVISOR_xen_version(XENVER_extraversion, extra);
	111	if (!ret)
	112	ret = sprintf(buffer, "%s\n", extra);
	113	kfree(extra);
	114	}
	115
	116	return ret;
	117	}
	118
	119	HYPERVISOR_ATTR_RO(extra);
	120
	121	static struct attribute *version_attrs[] = {
	122	&major_attr.attr,
	123	&minor_attr.attr,
	124	&extra_attr.attr,
	125	NULL
	126	};
	127
ead1d014	128	static const struct attribute_group version_group = {
cff7e81b JF	129	.name = "version",
	130	.attrs = version_attrs,
	131	};
	132
	133	static int __init xen_sysfs_version_init(void)
	134	{
	135	return sysfs_create_group(hypervisor_kobj, &version_group);
	136	}
	137
cff7e81b JF	138	/* UUID */
cff7e81b JF	139
5c13f806	140	static ssize_t uuid_show_fallback(struct hyp_sysfs_attr attr, char buffer)
cff7e81b JF	141	{
	142	char vm, val;
	143	int ret;
	144	extern int xenstored_ready;
	145
	146	if (!xenstored_ready)
	147	return -EBUSY;
	148
	149	vm = xenbus_read(XBT_NIL, "vm", "", NULL);
	150	if (IS_ERR(vm))
	151	return PTR_ERR(vm);
	152	val = xenbus_read(XBT_NIL, vm, "uuid", NULL);
	153	kfree(vm);
	154	if (IS_ERR(val))
	155	return PTR_ERR(val);
	156	ret = sprintf(buffer, "%s\n", val);
	157	kfree(val);
	158	return ret;
	159	}
	160
5c13f806 DDG	161	static ssize_t uuid_show(struct hyp_sysfs_attr attr, char buffer)
	162	{
	163	xen_domain_handle_t uuid;
	164	int ret;
	165	ret = HYPERVISOR_xen_version(XENVER_guest_handle, uuid);
	166	if (ret)
	167	return uuid_show_fallback(attr, buffer);
	168	ret = sprintf(buffer, "%pU\n", uuid);
	169	return ret;
	170	}
	171
cff7e81b JF	172	HYPERVISOR_ATTR_RO(uuid);
	173
	174	static int __init xen_sysfs_uuid_init(void)
	175	{
	176	return sysfs_create_file(hypervisor_kobj, &uuid_attr.attr);
	177	}
	178
cff7e81b JF	179	/* xen compilation attributes */
	180
	181	static ssize_t compiler_show(struct hyp_sysfs_attr attr, char buffer)
	182	{
	183	int ret = -ENOMEM;
	184	struct xen_compile_info *info;
	185
	186	info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL);
	187	if (info) {
	188	ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
	189	if (!ret)
	190	ret = sprintf(buffer, "%s\n", info->compiler);
	191	kfree(info);
	192	}
	193
	194	return ret;
	195	}
	196
	197	HYPERVISOR_ATTR_RO(compiler);
	198
	199	static ssize_t compiled_by_show(struct hyp_sysfs_attr attr, char buffer)
	200	{
	201	int ret = -ENOMEM;
	202	struct xen_compile_info *info;
	203
	204	info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL);
	205	if (info) {
	206	ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
	207	if (!ret)
	208	ret = sprintf(buffer, "%s\n", info->compile_by);
	209	kfree(info);
	210	}
	211
	212	return ret;
	213	}
	214
	215	HYPERVISOR_ATTR_RO(compiled_by);
	216
	217	static ssize_t compile_date_show(struct hyp_sysfs_attr attr, char buffer)
	218	{
	219	int ret = -ENOMEM;
	220	struct xen_compile_info *info;
	221
	222	info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL);
	223	if (info) {
	224	ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
	225	if (!ret)
	226	ret = sprintf(buffer, "%s\n", info->compile_date);
	227	kfree(info);
	228	}
	229
	230	return ret;
	231	}
	232
	233	HYPERVISOR_ATTR_RO(compile_date);
	234
	235	static struct attribute *xen_compile_attrs[] = {
	236	&compiler_attr.attr,
	237	&compiled_by_attr.attr,
	238	&compile_date_attr.attr,
	239	NULL
	240	};
	241
ead1d014	242	static const struct attribute_group xen_compilation_group = {
cff7e81b JF	243	.name = "compilation",
	244	.attrs = xen_compile_attrs,
	245	};
	246
5b00b504	247	static int __init xen_sysfs_compilation_init(void)
cff7e81b JF	248	{
	249	return sysfs_create_group(hypervisor_kobj, &xen_compilation_group);
	250	}
	251
cff7e81b JF	252	/* xen properties info */
	253
	254	static ssize_t capabilities_show(struct hyp_sysfs_attr attr, char buffer)
	255	{
	256	int ret = -ENOMEM;
	257	char *caps;
	258
	259	caps = kmalloc(XEN_CAPABILITIES_INFO_LEN, GFP_KERNEL);
	260	if (caps) {
	261	ret = HYPERVISOR_xen_version(XENVER_capabilities, caps);
	262	if (!ret)
	263	ret = sprintf(buffer, "%s\n", caps);
	264	kfree(caps);
	265	}
	266
	267	return ret;
	268	}
	269
	270	HYPERVISOR_ATTR_RO(capabilities);
	271
	272	static ssize_t changeset_show(struct hyp_sysfs_attr attr, char buffer)
	273	{
	274	int ret = -ENOMEM;
	275	char *cset;
	276
	277	cset = kmalloc(XEN_CHANGESET_INFO_LEN, GFP_KERNEL);
	278	if (cset) {
	279	ret = HYPERVISOR_xen_version(XENVER_changeset, cset);
	280	if (!ret)
	281	ret = sprintf(buffer, "%s\n", cset);
	282	kfree(cset);
	283	}
	284
	285	return ret;
	286	}
	287
	288	HYPERVISOR_ATTR_RO(changeset);
	289
	290	static ssize_t virtual_start_show(struct hyp_sysfs_attr attr, char buffer)
	291	{
	292	int ret = -ENOMEM;
	293	struct xen_platform_parameters *parms;
	294
	295	parms = kmalloc(sizeof(struct xen_platform_parameters), GFP_KERNEL);
	296	if (parms) {
	297	ret = HYPERVISOR_xen_version(XENVER_platform_parameters,
	298	parms);
	299	if (!ret)
37ea0fcb IC	300	ret = sprintf(buffer, "%"PRI_xen_ulong"\n",
37ea0fcb IC	301	parms->virt_start);
cff7e81b JF	302	kfree(parms);
	303	}
	304
	305	return ret;
	306	}
	307
	308	HYPERVISOR_ATTR_RO(virtual_start);
	309
	310	static ssize_t pagesize_show(struct hyp_sysfs_attr attr, char buffer)
	311	{
	312	int ret;
	313
	314	ret = HYPERVISOR_xen_version(XENVER_pagesize, NULL);
	315	if (ret > 0)
	316	ret = sprintf(buffer, "%x\n", ret);
	317
	318	return ret;
	319	}
	320
	321	HYPERVISOR_ATTR_RO(pagesize);
	322
cff7e81b JF	323	static ssize_t xen_feature_show(int index, char *buffer)
cff7e81b JF	324	{
a649b720 JF	325	ssize_t ret;
a649b720 JF	326	struct xen_feature_info info;
cff7e81b	327
a649b720 JF	328	info.submap_idx = index;
	329	ret = HYPERVISOR_xen_version(XENVER_get_features, &info);
	330	if (!ret)
	331	ret = sprintf(buffer, "%08x", info.submap);
cff7e81b JF	332
	333	return ret;
	334	}
	335
a649b720	336	static ssize_t features_show(struct hyp_sysfs_attr attr, char buffer)
cff7e81b	337	{
a649b720 JF	338	ssize_t len;
	339	int i;
	340
	341	len = 0;
	342	for (i = XENFEAT_NR_SUBMAPS-1; i >= 0; i--) {
	343	int ret = xen_feature_show(i, buffer + len);
	344	if (ret < 0) {
	345	if (len == 0)
	346	len = ret;
	347	break;
	348	}
	349	len += ret;
	350	}
	351	if (len > 0)
	352	buffer[len++] = '\n';
	353
	354	return len;
cff7e81b JF	355	}
cff7e81b JF	356
a649b720	357	HYPERVISOR_ATTR_RO(features);
cff7e81b	358
84b76257 JG	359	static ssize_t buildid_show(struct hyp_sysfs_attr attr, char buffer)
	360	{
	361	ssize_t ret;
	362	struct xen_build_id *buildid;
	363
	364	ret = HYPERVISOR_xen_version(XENVER_build_id, NULL);
	365	if (ret < 0) {
	366	if (ret == -EPERM)
	367	ret = sprintf(buffer, "<denied>");
	368	return ret;
	369	}
	370
	371	buildid = kmalloc(sizeof(*buildid) + ret, GFP_KERNEL);
	372	if (!buildid)
	373	return -ENOMEM;
	374
	375	buildid->len = ret;
	376	ret = HYPERVISOR_xen_version(XENVER_build_id, buildid);
	377	if (ret > 0)
	378	ret = sprintf(buffer, "%s", buildid->buf);
	379	kfree(buildid);
	380
	381	return ret;
	382	}
	383
	384	HYPERVISOR_ATTR_RO(buildid);
	385
cff7e81b JF	386	static struct attribute *xen_properties_attrs[] = {
	387	&capabilities_attr.attr,
	388	&changeset_attr.attr,
	389	&virtual_start_attr.attr,
	390	&pagesize_attr.attr,
a649b720	391	&features_attr.attr,
84b76257	392	&buildid_attr.attr,
cff7e81b JF	393	NULL
	394	};
	395
ead1d014	396	static const struct attribute_group xen_properties_group = {
cff7e81b JF	397	.name = "properties",
	398	.attrs = xen_properties_attrs,
	399	};
	400
5b00b504	401	static int __init xen_sysfs_properties_init(void)
cff7e81b JF	402	{
	403	return sysfs_create_group(hypervisor_kobj, &xen_properties_group);
	404	}
	405
5f141548 BO	406	#ifdef CONFIG_XEN_HAVE_VPMU
	407	struct pmu_mode {
	408	const char *name;
	409	uint32_t mode;
	410	};
	411
	412	static struct pmu_mode pmu_modes[] = {
	413	{"off", XENPMU_MODE_OFF},
	414	{"self", XENPMU_MODE_SELF},
	415	{"hv", XENPMU_MODE_HV},
	416	{"all", XENPMU_MODE_ALL}
	417	};
	418
	419	static ssize_t pmu_mode_store(struct hyp_sysfs_attr *attr,
	420	const char *buffer, size_t len)
	421	{
	422	int ret;
	423	struct xen_pmu_params xp;
	424	int i;
	425
	426	for (i = 0; i < ARRAY_SIZE(pmu_modes); i++) {
	427	if (strncmp(buffer, pmu_modes[i].name, len - 1) == 0) {
	428	xp.val = pmu_modes[i].mode;
	429	break;
	430	}
	431	}
	432
	433	if (i == ARRAY_SIZE(pmu_modes))
	434	return -EINVAL;
	435
	436	xp.version.maj = XENPMU_VER_MAJ;
	437	xp.version.min = XENPMU_VER_MIN;
	438	ret = HYPERVISOR_xenpmu_op(XENPMU_mode_set, &xp);
	439	if (ret)
	440	return ret;
	441
	442	return len;
	443	}
	444
	445	static ssize_t pmu_mode_show(struct hyp_sysfs_attr attr, char buffer)
	446	{
	447	int ret;
	448	struct xen_pmu_params xp;
	449	int i;
	450	uint32_t mode;
	451
	452	xp.version.maj = XENPMU_VER_MAJ;
	453	xp.version.min = XENPMU_VER_MIN;
	454	ret = HYPERVISOR_xenpmu_op(XENPMU_mode_get, &xp);
	455	if (ret)
	456	return ret;
	457
	458	mode = (uint32_t)xp.val;
	459	for (i = 0; i < ARRAY_SIZE(pmu_modes); i++) {
	460	if (mode == pmu_modes[i].mode)
	461	return sprintf(buffer, "%s\n", pmu_modes[i].name);
	462	}
	463
	464	return -EINVAL;
	465	}
	466	HYPERVISOR_ATTR_RW(pmu_mode);
	467
	468	static ssize_t pmu_features_store(struct hyp_sysfs_attr *attr,
	469	const char *buffer, size_t len)
470	{
471	int ret;
472	uint32_t features;
473	struct xen_pmu_params xp;
474
475	ret = kstrtou32(buffer, 0, &features);
476	if (ret)
477	return ret;
478
479	xp.val = features;
480	xp.version.maj = XENPMU_VER_MAJ;
481	xp.version.min = XENPMU_VER_MIN;
482	ret = HYPERVISOR_xenpmu_op(XENPMU_feature_set, &xp);
483	if (ret)
484	return ret;
485
486	return len;
487	}
488
489	static ssize_t pmu_features_show(struct hyp_sysfs_attr attr, char buffer)
490	{
491	int ret;
492	struct xen_pmu_params xp;
493
494	xp.version.maj = XENPMU_VER_MAJ;
495	xp.version.min = XENPMU_VER_MIN;
496	ret = HYPERVISOR_xenpmu_op(XENPMU_feature_get, &xp);
497	if (ret)
498	return ret;
499
500	return sprintf(buffer, "0x%x\n", (uint32_t)xp.val);
501	}
502	HYPERVISOR_ATTR_RW(pmu_features);
503
504	static struct attribute *xen_pmu_attrs[] = {
505	&pmu_mode_attr.attr,
506	&pmu_features_attr.attr,
507	NULL
508	};
509
510	static const struct attribute_group xen_pmu_group = {
511	.name = "pmu",
512	.attrs = xen_pmu_attrs,
513	};
514
5b00b504	515	static int __init xen_sysfs_pmu_init(void)
5f141548 BO	516	{
	517	return sysfs_create_group(hypervisor_kobj, &xen_pmu_group);
	518	}
5f141548 BO	519	#endif
5f141548 BO	520
cff7e81b JF	521	static int __init hyper_sysfs_init(void)
	522	{
	523	int ret;
	524
	525	if (!xen_domain())
	526	return -ENODEV;
	527
	528	ret = xen_sysfs_type_init();
	529	if (ret)
	530	goto out;
4a4c29c9 JG	531	ret = xen_sysfs_guest_type_init();
	532	if (ret)
	533	goto guest_type_out;
cff7e81b JF	534	ret = xen_sysfs_version_init();
	535	if (ret)
	536	goto version_out;
5b00b504	537	ret = xen_sysfs_compilation_init();
cff7e81b JF	538	if (ret)
	539	goto comp_out;
	540	ret = xen_sysfs_uuid_init();
	541	if (ret)
	542	goto uuid_out;
5b00b504	543	ret = xen_sysfs_properties_init();
cff7e81b JF	544	if (ret)
cff7e81b JF	545	goto prop_out;
5f141548 BO	546	#ifdef CONFIG_XEN_HAVE_VPMU
5f141548 BO	547	if (xen_initial_domain()) {
5b00b504	548	ret = xen_sysfs_pmu_init();
5f141548	549	if (ret) {
46894f17 PG	550	sysfs_remove_group(hypervisor_kobj,
46894f17 PG	551	&xen_properties_group);
5f141548 BO	552	goto prop_out;
	553	}
	554	}
	555	#endif
cff7e81b JF	556	goto out;
cff7e81b JF	557
cff7e81b	558	prop_out:
46894f17	559	sysfs_remove_file(hypervisor_kobj, &uuid_attr.attr);
cff7e81b	560	uuid_out:
46894f17	561	sysfs_remove_group(hypervisor_kobj, &xen_compilation_group);
cff7e81b	562	comp_out:
46894f17	563	sysfs_remove_group(hypervisor_kobj, &version_group);
cff7e81b	564	version_out:
4a4c29c9 JG	565	sysfs_remove_file(hypervisor_kobj, &guest_type_attr.attr);
4a4c29c9 JG	566	guest_type_out:
46894f17	567	sysfs_remove_file(hypervisor_kobj, &type_attr.attr);
cff7e81b JF	568	out:
	569	return ret;
	570	}
46894f17	571	device_initcall(hyper_sysfs_init);
cff7e81b JF	572
	573	static ssize_t hyp_sysfs_show(struct kobject *kobj,
	574	struct attribute *attr,
	575	char *buffer)
	576	{
	577	struct hyp_sysfs_attr *hyp_attr;
	578	hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr);
	579	if (hyp_attr->show)
	580	return hyp_attr->show(hyp_attr, buffer);
	581	return 0;
	582	}
	583
	584	static ssize_t hyp_sysfs_store(struct kobject *kobj,
	585	struct attribute *attr,
	586	const char *buffer,
	587	size_t len)
	588	{
	589	struct hyp_sysfs_attr *hyp_attr;
	590	hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr);
	591	if (hyp_attr->store)
	592	return hyp_attr->store(hyp_attr, buffer, len);
	593	return 0;
	594	}
	595
52cf25d0	596	static const struct sysfs_ops hyp_sysfs_ops = {
cff7e81b JF	597	.show = hyp_sysfs_show,
	598	.store = hyp_sysfs_store,
	599	};
	600
	601	static struct kobj_type hyp_sysfs_kobj_type = {
	602	.sysfs_ops = &hyp_sysfs_ops,
	603	};
	604
	605	static int __init hypervisor_subsys_init(void)
	606	{
	607	if (!xen_domain())
	608	return -ENODEV;
	609
	610	hypervisor_kobj->ktype = &hyp_sysfs_kobj_type;
	611	return 0;
	612	}
	613	device_initcall(hypervisor_subsys_init);