xref: /openbmc/linux/drivers/xen/sys-hypervisor.c (revision 609b0b8c4608d59be261dde748f1ff1eccd748ba)
1cff7e81bSJeremy Fitzhardinge /*
2cff7e81bSJeremy Fitzhardinge  *  copyright (c) 2006 IBM Corporation
3cff7e81bSJeremy Fitzhardinge  *  Authored by: Mike D. Day <ncmike@us.ibm.com>
4cff7e81bSJeremy Fitzhardinge  *
5cff7e81bSJeremy Fitzhardinge  *  This program is free software; you can redistribute it and/or modify
6cff7e81bSJeremy Fitzhardinge  *  it under the terms of the GNU General Public License version 2 as
7cff7e81bSJeremy Fitzhardinge  *  published by the Free Software Foundation.
8cff7e81bSJeremy Fitzhardinge  */
9cff7e81bSJeremy Fitzhardinge 
105a0e3ad6STejun Heo #include <linux/slab.h>
11cff7e81bSJeremy Fitzhardinge #include <linux/kernel.h>
12cff7e81bSJeremy Fitzhardinge #include <linux/module.h>
13cff7e81bSJeremy Fitzhardinge #include <linux/kobject.h>
14*609b0b8cSIan Campbell #include <linux/err.h>
15cff7e81bSJeremy Fitzhardinge 
16cff7e81bSJeremy Fitzhardinge #include <asm/xen/hypervisor.h>
17cff7e81bSJeremy Fitzhardinge #include <asm/xen/hypercall.h>
18cff7e81bSJeremy Fitzhardinge 
191ccbf534SJeremy Fitzhardinge #include <xen/xen.h>
20cff7e81bSJeremy Fitzhardinge #include <xen/xenbus.h>
21cff7e81bSJeremy Fitzhardinge #include <xen/interface/xen.h>
22cff7e81bSJeremy Fitzhardinge #include <xen/interface/version.h>
23cff7e81bSJeremy Fitzhardinge 
24cff7e81bSJeremy Fitzhardinge #define HYPERVISOR_ATTR_RO(_name) \
25cff7e81bSJeremy Fitzhardinge static struct hyp_sysfs_attr  _name##_attr = __ATTR_RO(_name)
26cff7e81bSJeremy Fitzhardinge 
27cff7e81bSJeremy Fitzhardinge #define HYPERVISOR_ATTR_RW(_name) \
28cff7e81bSJeremy Fitzhardinge static struct hyp_sysfs_attr _name##_attr = \
29cff7e81bSJeremy Fitzhardinge 	__ATTR(_name, 0644, _name##_show, _name##_store)
30cff7e81bSJeremy Fitzhardinge 
31cff7e81bSJeremy Fitzhardinge struct hyp_sysfs_attr {
32cff7e81bSJeremy Fitzhardinge 	struct attribute attr;
33cff7e81bSJeremy Fitzhardinge 	ssize_t (*show)(struct hyp_sysfs_attr *, char *);
34cff7e81bSJeremy Fitzhardinge 	ssize_t (*store)(struct hyp_sysfs_attr *, const char *, size_t);
35cff7e81bSJeremy Fitzhardinge 	void *hyp_attr_data;
36cff7e81bSJeremy Fitzhardinge };
37cff7e81bSJeremy Fitzhardinge 
38cff7e81bSJeremy Fitzhardinge static ssize_t type_show(struct hyp_sysfs_attr *attr, char *buffer)
39cff7e81bSJeremy Fitzhardinge {
40cff7e81bSJeremy Fitzhardinge 	return sprintf(buffer, "xen\n");
41cff7e81bSJeremy Fitzhardinge }
42cff7e81bSJeremy Fitzhardinge 
43cff7e81bSJeremy Fitzhardinge HYPERVISOR_ATTR_RO(type);
44cff7e81bSJeremy Fitzhardinge 
45cff7e81bSJeremy Fitzhardinge static int __init xen_sysfs_type_init(void)
46cff7e81bSJeremy Fitzhardinge {
47cff7e81bSJeremy Fitzhardinge 	return sysfs_create_file(hypervisor_kobj, &type_attr.attr);
48cff7e81bSJeremy Fitzhardinge }
49cff7e81bSJeremy Fitzhardinge 
50cff7e81bSJeremy Fitzhardinge static void xen_sysfs_type_destroy(void)
51cff7e81bSJeremy Fitzhardinge {
52cff7e81bSJeremy Fitzhardinge 	sysfs_remove_file(hypervisor_kobj, &type_attr.attr);
53cff7e81bSJeremy Fitzhardinge }
54cff7e81bSJeremy Fitzhardinge 
55cff7e81bSJeremy Fitzhardinge /* xen version attributes */
56cff7e81bSJeremy Fitzhardinge static ssize_t major_show(struct hyp_sysfs_attr *attr, char *buffer)
57cff7e81bSJeremy Fitzhardinge {
58cff7e81bSJeremy Fitzhardinge 	int version = HYPERVISOR_xen_version(XENVER_version, NULL);
59cff7e81bSJeremy Fitzhardinge 	if (version)
60cff7e81bSJeremy Fitzhardinge 		return sprintf(buffer, "%d\n", version >> 16);
61cff7e81bSJeremy Fitzhardinge 	return -ENODEV;
62cff7e81bSJeremy Fitzhardinge }
63cff7e81bSJeremy Fitzhardinge 
64cff7e81bSJeremy Fitzhardinge HYPERVISOR_ATTR_RO(major);
65cff7e81bSJeremy Fitzhardinge 
66cff7e81bSJeremy Fitzhardinge static ssize_t minor_show(struct hyp_sysfs_attr *attr, char *buffer)
67cff7e81bSJeremy Fitzhardinge {
68cff7e81bSJeremy Fitzhardinge 	int version = HYPERVISOR_xen_version(XENVER_version, NULL);
69cff7e81bSJeremy Fitzhardinge 	if (version)
70cff7e81bSJeremy Fitzhardinge 		return sprintf(buffer, "%d\n", version & 0xff);
71cff7e81bSJeremy Fitzhardinge 	return -ENODEV;
72cff7e81bSJeremy Fitzhardinge }
73cff7e81bSJeremy Fitzhardinge 
74cff7e81bSJeremy Fitzhardinge HYPERVISOR_ATTR_RO(minor);
75cff7e81bSJeremy Fitzhardinge 
76cff7e81bSJeremy Fitzhardinge static ssize_t extra_show(struct hyp_sysfs_attr *attr, char *buffer)
77cff7e81bSJeremy Fitzhardinge {
78cff7e81bSJeremy Fitzhardinge 	int ret = -ENOMEM;
79cff7e81bSJeremy Fitzhardinge 	char *extra;
80cff7e81bSJeremy Fitzhardinge 
81cff7e81bSJeremy Fitzhardinge 	extra = kmalloc(XEN_EXTRAVERSION_LEN, GFP_KERNEL);
82cff7e81bSJeremy Fitzhardinge 	if (extra) {
83cff7e81bSJeremy Fitzhardinge 		ret = HYPERVISOR_xen_version(XENVER_extraversion, extra);
84cff7e81bSJeremy Fitzhardinge 		if (!ret)
85cff7e81bSJeremy Fitzhardinge 			ret = sprintf(buffer, "%s\n", extra);
86cff7e81bSJeremy Fitzhardinge 		kfree(extra);
87cff7e81bSJeremy Fitzhardinge 	}
88cff7e81bSJeremy Fitzhardinge 
89cff7e81bSJeremy Fitzhardinge 	return ret;
90cff7e81bSJeremy Fitzhardinge }
91cff7e81bSJeremy Fitzhardinge 
92cff7e81bSJeremy Fitzhardinge HYPERVISOR_ATTR_RO(extra);
93cff7e81bSJeremy Fitzhardinge 
94cff7e81bSJeremy Fitzhardinge static struct attribute *version_attrs[] = {
95cff7e81bSJeremy Fitzhardinge 	&major_attr.attr,
96cff7e81bSJeremy Fitzhardinge 	&minor_attr.attr,
97cff7e81bSJeremy Fitzhardinge 	&extra_attr.attr,
98cff7e81bSJeremy Fitzhardinge 	NULL
99cff7e81bSJeremy Fitzhardinge };
100cff7e81bSJeremy Fitzhardinge 
101ead1d014SJan Beulich static const struct attribute_group version_group = {
102cff7e81bSJeremy Fitzhardinge 	.name = "version",
103cff7e81bSJeremy Fitzhardinge 	.attrs = version_attrs,
104cff7e81bSJeremy Fitzhardinge };
105cff7e81bSJeremy Fitzhardinge 
106cff7e81bSJeremy Fitzhardinge static int __init xen_sysfs_version_init(void)
107cff7e81bSJeremy Fitzhardinge {
108cff7e81bSJeremy Fitzhardinge 	return sysfs_create_group(hypervisor_kobj, &version_group);
109cff7e81bSJeremy Fitzhardinge }
110cff7e81bSJeremy Fitzhardinge 
111cff7e81bSJeremy Fitzhardinge static void xen_sysfs_version_destroy(void)
112cff7e81bSJeremy Fitzhardinge {
113cff7e81bSJeremy Fitzhardinge 	sysfs_remove_group(hypervisor_kobj, &version_group);
114cff7e81bSJeremy Fitzhardinge }
115cff7e81bSJeremy Fitzhardinge 
116cff7e81bSJeremy Fitzhardinge /* UUID */
117cff7e81bSJeremy Fitzhardinge 
1185c13f806SDaniel De Graaf static ssize_t uuid_show_fallback(struct hyp_sysfs_attr *attr, char *buffer)
119cff7e81bSJeremy Fitzhardinge {
120cff7e81bSJeremy Fitzhardinge 	char *vm, *val;
121cff7e81bSJeremy Fitzhardinge 	int ret;
122cff7e81bSJeremy Fitzhardinge 	extern int xenstored_ready;
123cff7e81bSJeremy Fitzhardinge 
124cff7e81bSJeremy Fitzhardinge 	if (!xenstored_ready)
125cff7e81bSJeremy Fitzhardinge 		return -EBUSY;
126cff7e81bSJeremy Fitzhardinge 
127cff7e81bSJeremy Fitzhardinge 	vm = xenbus_read(XBT_NIL, "vm", "", NULL);
128cff7e81bSJeremy Fitzhardinge 	if (IS_ERR(vm))
129cff7e81bSJeremy Fitzhardinge 		return PTR_ERR(vm);
130cff7e81bSJeremy Fitzhardinge 	val = xenbus_read(XBT_NIL, vm, "uuid", NULL);
131cff7e81bSJeremy Fitzhardinge 	kfree(vm);
132cff7e81bSJeremy Fitzhardinge 	if (IS_ERR(val))
133cff7e81bSJeremy Fitzhardinge 		return PTR_ERR(val);
134cff7e81bSJeremy Fitzhardinge 	ret = sprintf(buffer, "%s\n", val);
135cff7e81bSJeremy Fitzhardinge 	kfree(val);
136cff7e81bSJeremy Fitzhardinge 	return ret;
137cff7e81bSJeremy Fitzhardinge }
138cff7e81bSJeremy Fitzhardinge 
1395c13f806SDaniel De Graaf static ssize_t uuid_show(struct hyp_sysfs_attr *attr, char *buffer)
1405c13f806SDaniel De Graaf {
1415c13f806SDaniel De Graaf 	xen_domain_handle_t uuid;
1425c13f806SDaniel De Graaf 	int ret;
1435c13f806SDaniel De Graaf 	ret = HYPERVISOR_xen_version(XENVER_guest_handle, uuid);
1445c13f806SDaniel De Graaf 	if (ret)
1455c13f806SDaniel De Graaf 		return uuid_show_fallback(attr, buffer);
1465c13f806SDaniel De Graaf 	ret = sprintf(buffer, "%pU\n", uuid);
1475c13f806SDaniel De Graaf 	return ret;
1485c13f806SDaniel De Graaf }
1495c13f806SDaniel De Graaf 
150cff7e81bSJeremy Fitzhardinge HYPERVISOR_ATTR_RO(uuid);
151cff7e81bSJeremy Fitzhardinge 
152cff7e81bSJeremy Fitzhardinge static int __init xen_sysfs_uuid_init(void)
153cff7e81bSJeremy Fitzhardinge {
154cff7e81bSJeremy Fitzhardinge 	return sysfs_create_file(hypervisor_kobj, &uuid_attr.attr);
155cff7e81bSJeremy Fitzhardinge }
156cff7e81bSJeremy Fitzhardinge 
157cff7e81bSJeremy Fitzhardinge static void xen_sysfs_uuid_destroy(void)
158cff7e81bSJeremy Fitzhardinge {
159cff7e81bSJeremy Fitzhardinge 	sysfs_remove_file(hypervisor_kobj, &uuid_attr.attr);
160cff7e81bSJeremy Fitzhardinge }
161cff7e81bSJeremy Fitzhardinge 
162cff7e81bSJeremy Fitzhardinge /* xen compilation attributes */
163cff7e81bSJeremy Fitzhardinge 
164cff7e81bSJeremy Fitzhardinge static ssize_t compiler_show(struct hyp_sysfs_attr *attr, char *buffer)
165cff7e81bSJeremy Fitzhardinge {
166cff7e81bSJeremy Fitzhardinge 	int ret = -ENOMEM;
167cff7e81bSJeremy Fitzhardinge 	struct xen_compile_info *info;
168cff7e81bSJeremy Fitzhardinge 
169cff7e81bSJeremy Fitzhardinge 	info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL);
170cff7e81bSJeremy Fitzhardinge 	if (info) {
171cff7e81bSJeremy Fitzhardinge 		ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
172cff7e81bSJeremy Fitzhardinge 		if (!ret)
173cff7e81bSJeremy Fitzhardinge 			ret = sprintf(buffer, "%s\n", info->compiler);
174cff7e81bSJeremy Fitzhardinge 		kfree(info);
175cff7e81bSJeremy Fitzhardinge 	}
176cff7e81bSJeremy Fitzhardinge 
177cff7e81bSJeremy Fitzhardinge 	return ret;
178cff7e81bSJeremy Fitzhardinge }
179cff7e81bSJeremy Fitzhardinge 
180cff7e81bSJeremy Fitzhardinge HYPERVISOR_ATTR_RO(compiler);
181cff7e81bSJeremy Fitzhardinge 
182cff7e81bSJeremy Fitzhardinge static ssize_t compiled_by_show(struct hyp_sysfs_attr *attr, char *buffer)
183cff7e81bSJeremy Fitzhardinge {
184cff7e81bSJeremy Fitzhardinge 	int ret = -ENOMEM;
185cff7e81bSJeremy Fitzhardinge 	struct xen_compile_info *info;
186cff7e81bSJeremy Fitzhardinge 
187cff7e81bSJeremy Fitzhardinge 	info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL);
188cff7e81bSJeremy Fitzhardinge 	if (info) {
189cff7e81bSJeremy Fitzhardinge 		ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
190cff7e81bSJeremy Fitzhardinge 		if (!ret)
191cff7e81bSJeremy Fitzhardinge 			ret = sprintf(buffer, "%s\n", info->compile_by);
192cff7e81bSJeremy Fitzhardinge 		kfree(info);
193cff7e81bSJeremy Fitzhardinge 	}
194cff7e81bSJeremy Fitzhardinge 
195cff7e81bSJeremy Fitzhardinge 	return ret;
196cff7e81bSJeremy Fitzhardinge }
197cff7e81bSJeremy Fitzhardinge 
198cff7e81bSJeremy Fitzhardinge HYPERVISOR_ATTR_RO(compiled_by);
199cff7e81bSJeremy Fitzhardinge 
200cff7e81bSJeremy Fitzhardinge static ssize_t compile_date_show(struct hyp_sysfs_attr *attr, char *buffer)
201cff7e81bSJeremy Fitzhardinge {
202cff7e81bSJeremy Fitzhardinge 	int ret = -ENOMEM;
203cff7e81bSJeremy Fitzhardinge 	struct xen_compile_info *info;
204cff7e81bSJeremy Fitzhardinge 
205cff7e81bSJeremy Fitzhardinge 	info = kmalloc(sizeof(struct xen_compile_info), GFP_KERNEL);
206cff7e81bSJeremy Fitzhardinge 	if (info) {
207cff7e81bSJeremy Fitzhardinge 		ret = HYPERVISOR_xen_version(XENVER_compile_info, info);
208cff7e81bSJeremy Fitzhardinge 		if (!ret)
209cff7e81bSJeremy Fitzhardinge 			ret = sprintf(buffer, "%s\n", info->compile_date);
210cff7e81bSJeremy Fitzhardinge 		kfree(info);
211cff7e81bSJeremy Fitzhardinge 	}
212cff7e81bSJeremy Fitzhardinge 
213cff7e81bSJeremy Fitzhardinge 	return ret;
214cff7e81bSJeremy Fitzhardinge }
215cff7e81bSJeremy Fitzhardinge 
216cff7e81bSJeremy Fitzhardinge HYPERVISOR_ATTR_RO(compile_date);
217cff7e81bSJeremy Fitzhardinge 
218cff7e81bSJeremy Fitzhardinge static struct attribute *xen_compile_attrs[] = {
219cff7e81bSJeremy Fitzhardinge 	&compiler_attr.attr,
220cff7e81bSJeremy Fitzhardinge 	&compiled_by_attr.attr,
221cff7e81bSJeremy Fitzhardinge 	&compile_date_attr.attr,
222cff7e81bSJeremy Fitzhardinge 	NULL
223cff7e81bSJeremy Fitzhardinge };
224cff7e81bSJeremy Fitzhardinge 
225ead1d014SJan Beulich static const struct attribute_group xen_compilation_group = {
226cff7e81bSJeremy Fitzhardinge 	.name = "compilation",
227cff7e81bSJeremy Fitzhardinge 	.attrs = xen_compile_attrs,
228cff7e81bSJeremy Fitzhardinge };
229cff7e81bSJeremy Fitzhardinge 
230887cb456SDaniel Kiper static int __init xen_compilation_init(void)
231cff7e81bSJeremy Fitzhardinge {
232cff7e81bSJeremy Fitzhardinge 	return sysfs_create_group(hypervisor_kobj, &xen_compilation_group);
233cff7e81bSJeremy Fitzhardinge }
234cff7e81bSJeremy Fitzhardinge 
235cff7e81bSJeremy Fitzhardinge static void xen_compilation_destroy(void)
236cff7e81bSJeremy Fitzhardinge {
237cff7e81bSJeremy Fitzhardinge 	sysfs_remove_group(hypervisor_kobj, &xen_compilation_group);
238cff7e81bSJeremy Fitzhardinge }
239cff7e81bSJeremy Fitzhardinge 
240cff7e81bSJeremy Fitzhardinge /* xen properties info */
241cff7e81bSJeremy Fitzhardinge 
242cff7e81bSJeremy Fitzhardinge static ssize_t capabilities_show(struct hyp_sysfs_attr *attr, char *buffer)
243cff7e81bSJeremy Fitzhardinge {
244cff7e81bSJeremy Fitzhardinge 	int ret = -ENOMEM;
245cff7e81bSJeremy Fitzhardinge 	char *caps;
246cff7e81bSJeremy Fitzhardinge 
247cff7e81bSJeremy Fitzhardinge 	caps = kmalloc(XEN_CAPABILITIES_INFO_LEN, GFP_KERNEL);
248cff7e81bSJeremy Fitzhardinge 	if (caps) {
249cff7e81bSJeremy Fitzhardinge 		ret = HYPERVISOR_xen_version(XENVER_capabilities, caps);
250cff7e81bSJeremy Fitzhardinge 		if (!ret)
251cff7e81bSJeremy Fitzhardinge 			ret = sprintf(buffer, "%s\n", caps);
252cff7e81bSJeremy Fitzhardinge 		kfree(caps);
253cff7e81bSJeremy Fitzhardinge 	}
254cff7e81bSJeremy Fitzhardinge 
255cff7e81bSJeremy Fitzhardinge 	return ret;
256cff7e81bSJeremy Fitzhardinge }
257cff7e81bSJeremy Fitzhardinge 
258cff7e81bSJeremy Fitzhardinge HYPERVISOR_ATTR_RO(capabilities);
259cff7e81bSJeremy Fitzhardinge 
260cff7e81bSJeremy Fitzhardinge static ssize_t changeset_show(struct hyp_sysfs_attr *attr, char *buffer)
261cff7e81bSJeremy Fitzhardinge {
262cff7e81bSJeremy Fitzhardinge 	int ret = -ENOMEM;
263cff7e81bSJeremy Fitzhardinge 	char *cset;
264cff7e81bSJeremy Fitzhardinge 
265cff7e81bSJeremy Fitzhardinge 	cset = kmalloc(XEN_CHANGESET_INFO_LEN, GFP_KERNEL);
266cff7e81bSJeremy Fitzhardinge 	if (cset) {
267cff7e81bSJeremy Fitzhardinge 		ret = HYPERVISOR_xen_version(XENVER_changeset, cset);
268cff7e81bSJeremy Fitzhardinge 		if (!ret)
269cff7e81bSJeremy Fitzhardinge 			ret = sprintf(buffer, "%s\n", cset);
270cff7e81bSJeremy Fitzhardinge 		kfree(cset);
271cff7e81bSJeremy Fitzhardinge 	}
272cff7e81bSJeremy Fitzhardinge 
273cff7e81bSJeremy Fitzhardinge 	return ret;
274cff7e81bSJeremy Fitzhardinge }
275cff7e81bSJeremy Fitzhardinge 
276cff7e81bSJeremy Fitzhardinge HYPERVISOR_ATTR_RO(changeset);
277cff7e81bSJeremy Fitzhardinge 
278cff7e81bSJeremy Fitzhardinge static ssize_t virtual_start_show(struct hyp_sysfs_attr *attr, char *buffer)
279cff7e81bSJeremy Fitzhardinge {
280cff7e81bSJeremy Fitzhardinge 	int ret = -ENOMEM;
281cff7e81bSJeremy Fitzhardinge 	struct xen_platform_parameters *parms;
282cff7e81bSJeremy Fitzhardinge 
283cff7e81bSJeremy Fitzhardinge 	parms = kmalloc(sizeof(struct xen_platform_parameters), GFP_KERNEL);
284cff7e81bSJeremy Fitzhardinge 	if (parms) {
285cff7e81bSJeremy Fitzhardinge 		ret = HYPERVISOR_xen_version(XENVER_platform_parameters,
286cff7e81bSJeremy Fitzhardinge 					     parms);
287cff7e81bSJeremy Fitzhardinge 		if (!ret)
288cff7e81bSJeremy Fitzhardinge 			ret = sprintf(buffer, "%lx\n", parms->virt_start);
289cff7e81bSJeremy Fitzhardinge 		kfree(parms);
290cff7e81bSJeremy Fitzhardinge 	}
291cff7e81bSJeremy Fitzhardinge 
292cff7e81bSJeremy Fitzhardinge 	return ret;
293cff7e81bSJeremy Fitzhardinge }
294cff7e81bSJeremy Fitzhardinge 
295cff7e81bSJeremy Fitzhardinge HYPERVISOR_ATTR_RO(virtual_start);
296cff7e81bSJeremy Fitzhardinge 
297cff7e81bSJeremy Fitzhardinge static ssize_t pagesize_show(struct hyp_sysfs_attr *attr, char *buffer)
298cff7e81bSJeremy Fitzhardinge {
299cff7e81bSJeremy Fitzhardinge 	int ret;
300cff7e81bSJeremy Fitzhardinge 
301cff7e81bSJeremy Fitzhardinge 	ret = HYPERVISOR_xen_version(XENVER_pagesize, NULL);
302cff7e81bSJeremy Fitzhardinge 	if (ret > 0)
303cff7e81bSJeremy Fitzhardinge 		ret = sprintf(buffer, "%x\n", ret);
304cff7e81bSJeremy Fitzhardinge 
305cff7e81bSJeremy Fitzhardinge 	return ret;
306cff7e81bSJeremy Fitzhardinge }
307cff7e81bSJeremy Fitzhardinge 
308cff7e81bSJeremy Fitzhardinge HYPERVISOR_ATTR_RO(pagesize);
309cff7e81bSJeremy Fitzhardinge 
310cff7e81bSJeremy Fitzhardinge static ssize_t xen_feature_show(int index, char *buffer)
311cff7e81bSJeremy Fitzhardinge {
312a649b720SJeremy Fitzhardinge 	ssize_t ret;
313a649b720SJeremy Fitzhardinge 	struct xen_feature_info info;
314cff7e81bSJeremy Fitzhardinge 
315a649b720SJeremy Fitzhardinge 	info.submap_idx = index;
316a649b720SJeremy Fitzhardinge 	ret = HYPERVISOR_xen_version(XENVER_get_features, &info);
317cff7e81bSJeremy Fitzhardinge 	if (!ret)
318a649b720SJeremy Fitzhardinge 		ret = sprintf(buffer, "%08x", info.submap);
319cff7e81bSJeremy Fitzhardinge 
320cff7e81bSJeremy Fitzhardinge 	return ret;
321cff7e81bSJeremy Fitzhardinge }
322cff7e81bSJeremy Fitzhardinge 
323a649b720SJeremy Fitzhardinge static ssize_t features_show(struct hyp_sysfs_attr *attr, char *buffer)
324cff7e81bSJeremy Fitzhardinge {
325a649b720SJeremy Fitzhardinge 	ssize_t len;
326a649b720SJeremy Fitzhardinge 	int i;
327a649b720SJeremy Fitzhardinge 
328a649b720SJeremy Fitzhardinge 	len = 0;
329a649b720SJeremy Fitzhardinge 	for (i = XENFEAT_NR_SUBMAPS-1; i >= 0; i--) {
330a649b720SJeremy Fitzhardinge 		int ret = xen_feature_show(i, buffer + len);
331a649b720SJeremy Fitzhardinge 		if (ret < 0) {
332a649b720SJeremy Fitzhardinge 			if (len == 0)
333a649b720SJeremy Fitzhardinge 				len = ret;
334a649b720SJeremy Fitzhardinge 			break;
335a649b720SJeremy Fitzhardinge 		}
336a649b720SJeremy Fitzhardinge 		len += ret;
337a649b720SJeremy Fitzhardinge 	}
338a649b720SJeremy Fitzhardinge 	if (len > 0)
339a649b720SJeremy Fitzhardinge 		buffer[len++] = '\n';
340a649b720SJeremy Fitzhardinge 
341a649b720SJeremy Fitzhardinge 	return len;
342cff7e81bSJeremy Fitzhardinge }
343cff7e81bSJeremy Fitzhardinge 
344a649b720SJeremy Fitzhardinge HYPERVISOR_ATTR_RO(features);
345cff7e81bSJeremy Fitzhardinge 
346cff7e81bSJeremy Fitzhardinge static struct attribute *xen_properties_attrs[] = {
347cff7e81bSJeremy Fitzhardinge 	&capabilities_attr.attr,
348cff7e81bSJeremy Fitzhardinge 	&changeset_attr.attr,
349cff7e81bSJeremy Fitzhardinge 	&virtual_start_attr.attr,
350cff7e81bSJeremy Fitzhardinge 	&pagesize_attr.attr,
351a649b720SJeremy Fitzhardinge 	&features_attr.attr,
352cff7e81bSJeremy Fitzhardinge 	NULL
353cff7e81bSJeremy Fitzhardinge };
354cff7e81bSJeremy Fitzhardinge 
355ead1d014SJan Beulich static const struct attribute_group xen_properties_group = {
356cff7e81bSJeremy Fitzhardinge 	.name = "properties",
357cff7e81bSJeremy Fitzhardinge 	.attrs = xen_properties_attrs,
358cff7e81bSJeremy Fitzhardinge };
359cff7e81bSJeremy Fitzhardinge 
360cff7e81bSJeremy Fitzhardinge static int __init xen_properties_init(void)
361cff7e81bSJeremy Fitzhardinge {
362cff7e81bSJeremy Fitzhardinge 	return sysfs_create_group(hypervisor_kobj, &xen_properties_group);
363cff7e81bSJeremy Fitzhardinge }
364cff7e81bSJeremy Fitzhardinge 
365cff7e81bSJeremy Fitzhardinge static void xen_properties_destroy(void)
366cff7e81bSJeremy Fitzhardinge {
367cff7e81bSJeremy Fitzhardinge 	sysfs_remove_group(hypervisor_kobj, &xen_properties_group);
368cff7e81bSJeremy Fitzhardinge }
369cff7e81bSJeremy Fitzhardinge 
370cff7e81bSJeremy Fitzhardinge static int __init hyper_sysfs_init(void)
371cff7e81bSJeremy Fitzhardinge {
372cff7e81bSJeremy Fitzhardinge 	int ret;
373cff7e81bSJeremy Fitzhardinge 
374cff7e81bSJeremy Fitzhardinge 	if (!xen_domain())
375cff7e81bSJeremy Fitzhardinge 		return -ENODEV;
376cff7e81bSJeremy Fitzhardinge 
377cff7e81bSJeremy Fitzhardinge 	ret = xen_sysfs_type_init();
378cff7e81bSJeremy Fitzhardinge 	if (ret)
379cff7e81bSJeremy Fitzhardinge 		goto out;
380cff7e81bSJeremy Fitzhardinge 	ret = xen_sysfs_version_init();
381cff7e81bSJeremy Fitzhardinge 	if (ret)
382cff7e81bSJeremy Fitzhardinge 		goto version_out;
383cff7e81bSJeremy Fitzhardinge 	ret = xen_compilation_init();
384cff7e81bSJeremy Fitzhardinge 	if (ret)
385cff7e81bSJeremy Fitzhardinge 		goto comp_out;
386cff7e81bSJeremy Fitzhardinge 	ret = xen_sysfs_uuid_init();
387cff7e81bSJeremy Fitzhardinge 	if (ret)
388cff7e81bSJeremy Fitzhardinge 		goto uuid_out;
389cff7e81bSJeremy Fitzhardinge 	ret = xen_properties_init();
390cff7e81bSJeremy Fitzhardinge 	if (ret)
391cff7e81bSJeremy Fitzhardinge 		goto prop_out;
392cff7e81bSJeremy Fitzhardinge 
393cff7e81bSJeremy Fitzhardinge 	goto out;
394cff7e81bSJeremy Fitzhardinge 
395cff7e81bSJeremy Fitzhardinge prop_out:
396cff7e81bSJeremy Fitzhardinge 	xen_sysfs_uuid_destroy();
397cff7e81bSJeremy Fitzhardinge uuid_out:
398cff7e81bSJeremy Fitzhardinge 	xen_compilation_destroy();
399cff7e81bSJeremy Fitzhardinge comp_out:
400cff7e81bSJeremy Fitzhardinge 	xen_sysfs_version_destroy();
401cff7e81bSJeremy Fitzhardinge version_out:
402cff7e81bSJeremy Fitzhardinge 	xen_sysfs_type_destroy();
403cff7e81bSJeremy Fitzhardinge out:
404cff7e81bSJeremy Fitzhardinge 	return ret;
405cff7e81bSJeremy Fitzhardinge }
406cff7e81bSJeremy Fitzhardinge 
407cff7e81bSJeremy Fitzhardinge static void __exit hyper_sysfs_exit(void)
408cff7e81bSJeremy Fitzhardinge {
409cff7e81bSJeremy Fitzhardinge 	xen_properties_destroy();
410cff7e81bSJeremy Fitzhardinge 	xen_compilation_destroy();
411cff7e81bSJeremy Fitzhardinge 	xen_sysfs_uuid_destroy();
412cff7e81bSJeremy Fitzhardinge 	xen_sysfs_version_destroy();
413cff7e81bSJeremy Fitzhardinge 	xen_sysfs_type_destroy();
414cff7e81bSJeremy Fitzhardinge 
415cff7e81bSJeremy Fitzhardinge }
416cff7e81bSJeremy Fitzhardinge module_init(hyper_sysfs_init);
417cff7e81bSJeremy Fitzhardinge module_exit(hyper_sysfs_exit);
418cff7e81bSJeremy Fitzhardinge 
419cff7e81bSJeremy Fitzhardinge static ssize_t hyp_sysfs_show(struct kobject *kobj,
420cff7e81bSJeremy Fitzhardinge 			      struct attribute *attr,
421cff7e81bSJeremy Fitzhardinge 			      char *buffer)
422cff7e81bSJeremy Fitzhardinge {
423cff7e81bSJeremy Fitzhardinge 	struct hyp_sysfs_attr *hyp_attr;
424cff7e81bSJeremy Fitzhardinge 	hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr);
425cff7e81bSJeremy Fitzhardinge 	if (hyp_attr->show)
426cff7e81bSJeremy Fitzhardinge 		return hyp_attr->show(hyp_attr, buffer);
427cff7e81bSJeremy Fitzhardinge 	return 0;
428cff7e81bSJeremy Fitzhardinge }
429cff7e81bSJeremy Fitzhardinge 
430cff7e81bSJeremy Fitzhardinge static ssize_t hyp_sysfs_store(struct kobject *kobj,
431cff7e81bSJeremy Fitzhardinge 			       struct attribute *attr,
432cff7e81bSJeremy Fitzhardinge 			       const char *buffer,
433cff7e81bSJeremy Fitzhardinge 			       size_t len)
434cff7e81bSJeremy Fitzhardinge {
435cff7e81bSJeremy Fitzhardinge 	struct hyp_sysfs_attr *hyp_attr;
436cff7e81bSJeremy Fitzhardinge 	hyp_attr = container_of(attr, struct hyp_sysfs_attr, attr);
437cff7e81bSJeremy Fitzhardinge 	if (hyp_attr->store)
438cff7e81bSJeremy Fitzhardinge 		return hyp_attr->store(hyp_attr, buffer, len);
439cff7e81bSJeremy Fitzhardinge 	return 0;
440cff7e81bSJeremy Fitzhardinge }
441cff7e81bSJeremy Fitzhardinge 
44252cf25d0SEmese Revfy static const struct sysfs_ops hyp_sysfs_ops = {
443cff7e81bSJeremy Fitzhardinge 	.show = hyp_sysfs_show,
444cff7e81bSJeremy Fitzhardinge 	.store = hyp_sysfs_store,
445cff7e81bSJeremy Fitzhardinge };
446cff7e81bSJeremy Fitzhardinge 
447cff7e81bSJeremy Fitzhardinge static struct kobj_type hyp_sysfs_kobj_type = {
448cff7e81bSJeremy Fitzhardinge 	.sysfs_ops = &hyp_sysfs_ops,
449cff7e81bSJeremy Fitzhardinge };
450cff7e81bSJeremy Fitzhardinge 
451cff7e81bSJeremy Fitzhardinge static int __init hypervisor_subsys_init(void)
452cff7e81bSJeremy Fitzhardinge {
453cff7e81bSJeremy Fitzhardinge 	if (!xen_domain())
454cff7e81bSJeremy Fitzhardinge 		return -ENODEV;
455cff7e81bSJeremy Fitzhardinge 
456cff7e81bSJeremy Fitzhardinge 	hypervisor_kobj->ktype = &hyp_sysfs_kobj_type;
457cff7e81bSJeremy Fitzhardinge 	return 0;
458cff7e81bSJeremy Fitzhardinge }
459cff7e81bSJeremy Fitzhardinge device_initcall(hypervisor_subsys_init);
460