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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _VHOST_H
3#define _VHOST_H
4
5#include <linux/eventfd.h>
6#include <linux/vhost.h>
7#include <linux/mm.h>
8#include <linux/mutex.h>
9#include <linux/poll.h>
10#include <linux/file.h>
11#include <linux/uio.h>
12#include <linux/virtio_config.h>
13#include <linux/virtio_ring.h>
14#include <linux/atomic.h>
15#include <linux/vhost_iotlb.h>
16#include <linux/irqbypass.h>
17
18struct vhost_work;
19struct vhost_task;
20typedef void (*vhost_work_fn_t)(struct vhost_work *work);
21
22#define VHOST_WORK_QUEUED 1
23struct vhost_work {
24 struct llist_node node;
25 vhost_work_fn_t fn;
26 unsigned long flags;
27};
28
29struct vhost_worker {
30 struct vhost_task *vtsk;
31 /* Used to serialize device wide flushing with worker swapping. */
32 struct mutex mutex;
33 struct llist_head work_list;
34 u64 kcov_handle;
35 u32 id;
36 int attachment_cnt;
37};
38
39/* Poll a file (eventfd or socket) */
40/* Note: there's nothing vhost specific about this structure. */
41struct vhost_poll {
42 poll_table table;
43 wait_queue_head_t *wqh;
44 wait_queue_entry_t wait;
45 struct vhost_work work;
46 __poll_t mask;
47 struct vhost_dev *dev;
48 struct vhost_virtqueue *vq;
49};
50
51void vhost_poll_init(struct vhost_poll *poll, vhost_work_fn_t fn,
52 __poll_t mask, struct vhost_dev *dev,
53 struct vhost_virtqueue *vq);
54int vhost_poll_start(struct vhost_poll *poll, struct file *file);
55void vhost_poll_stop(struct vhost_poll *poll);
56void vhost_poll_queue(struct vhost_poll *poll);
57
58void vhost_work_init(struct vhost_work *work, vhost_work_fn_t fn);
59void vhost_dev_flush(struct vhost_dev *dev);
60
61struct vhost_log {
62 u64 addr;
63 u64 len;
64};
65
66enum vhost_uaddr_type {
67 VHOST_ADDR_DESC = 0,
68 VHOST_ADDR_AVAIL = 1,
69 VHOST_ADDR_USED = 2,
70 VHOST_NUM_ADDRS = 3,
71};
72
73struct vhost_vring_call {
74 struct eventfd_ctx *ctx;
75 struct irq_bypass_producer producer;
76};
77
78/* The virtqueue structure describes a queue attached to a device. */
79struct vhost_virtqueue {
80 struct vhost_dev *dev;
81 struct vhost_worker __rcu *worker;
82
83 /* The actual ring of buffers. */
84 struct mutex mutex;
85 unsigned int num;
86 vring_desc_t __user *desc;
87 vring_avail_t __user *avail;
88 vring_used_t __user *used;
89 const struct vhost_iotlb_map *meta_iotlb[VHOST_NUM_ADDRS];
90 struct file *kick;
91 struct vhost_vring_call call_ctx;
92 struct eventfd_ctx *error_ctx;
93 struct eventfd_ctx *log_ctx;
94
95 struct vhost_poll poll;
96
97 /* The routine to call when the Guest pings us, or timeout. */
98 vhost_work_fn_t handle_kick;
99
100 /* Last available index we saw.
101 * Values are limited to 0x7fff, and the high bit is used as
102 * a wrap counter when using VIRTIO_F_RING_PACKED. */
103 u16 last_avail_idx;
104
105 /* Caches available index value from user. */
106 u16 avail_idx;
107
108 /* Last index we used.
109 * Values are limited to 0x7fff, and the high bit is used as
110 * a wrap counter when using VIRTIO_F_RING_PACKED. */
111 u16 last_used_idx;
112
113 /* Used flags */
114 u16 used_flags;
115
116 /* Last used index value we have signalled on */
117 u16 signalled_used;
118
119 /* Last used index value we have signalled on */
120 bool signalled_used_valid;
121
122 /* Log writes to used structure. */
123 bool log_used;
124 u64 log_addr;
125
126 struct iovec iov[UIO_MAXIOV];
127 struct iovec iotlb_iov[64];
128 struct iovec *indirect;
129 struct vring_used_elem *heads;
130 /* Protected by virtqueue mutex. */
131 struct vhost_iotlb *umem;
132 struct vhost_iotlb *iotlb;
133 void *private_data;
134 u64 acked_features;
135 u64 acked_backend_features;
136 /* Log write descriptors */
137 void __user *log_base;
138 struct vhost_log *log;
139 struct iovec log_iov[64];
140
141 /* Ring endianness. Defaults to legacy native endianness.
142 * Set to true when starting a modern virtio device. */
143 bool is_le;
144#ifdef CONFIG_VHOST_CROSS_ENDIAN_LEGACY
145 /* Ring endianness requested by userspace for cross-endian support. */
146 bool user_be;
147#endif
148 u32 busyloop_timeout;
149};
150
151struct vhost_msg_node {
152 union {
153 struct vhost_msg msg;
154 struct vhost_msg_v2 msg_v2;
155 };
156 struct vhost_virtqueue *vq;
157 struct list_head node;
158};
159
160struct vhost_dev {
161 struct mm_struct *mm;
162 struct mutex mutex;
163 struct vhost_virtqueue **vqs;
164 int nvqs;
165 struct eventfd_ctx *log_ctx;
166 struct vhost_iotlb *umem;
167 struct vhost_iotlb *iotlb;
168 spinlock_t iotlb_lock;
169 struct list_head read_list;
170 struct list_head pending_list;
171 wait_queue_head_t wait;
172 int iov_limit;
173 int weight;
174 int byte_weight;
175 struct xarray worker_xa;
176 bool use_worker;
177 int (*msg_handler)(struct vhost_dev *dev, u32 asid,
178 struct vhost_iotlb_msg *msg);
179};
180
181bool vhost_exceeds_weight(struct vhost_virtqueue *vq, int pkts, int total_len);
182void vhost_dev_init(struct vhost_dev *, struct vhost_virtqueue **vqs,
183 int nvqs, int iov_limit, int weight, int byte_weight,
184 bool use_worker,
185 int (*msg_handler)(struct vhost_dev *dev, u32 asid,
186 struct vhost_iotlb_msg *msg));
187long vhost_dev_set_owner(struct vhost_dev *dev);
188bool vhost_dev_has_owner(struct vhost_dev *dev);
189long vhost_dev_check_owner(struct vhost_dev *);
190struct vhost_iotlb *vhost_dev_reset_owner_prepare(void);
191void vhost_dev_reset_owner(struct vhost_dev *dev, struct vhost_iotlb *iotlb);
192void vhost_dev_cleanup(struct vhost_dev *);
193void vhost_dev_stop(struct vhost_dev *);
194long vhost_dev_ioctl(struct vhost_dev *, unsigned int ioctl, void __user *argp);
195long vhost_vring_ioctl(struct vhost_dev *d, unsigned int ioctl, void __user *argp);
196long vhost_worker_ioctl(struct vhost_dev *dev, unsigned int ioctl,
197 void __user *argp);
198bool vhost_vq_access_ok(struct vhost_virtqueue *vq);
199bool vhost_log_access_ok(struct vhost_dev *);
200void vhost_clear_msg(struct vhost_dev *dev);
201
202int vhost_get_vq_desc(struct vhost_virtqueue *,
203 struct iovec iov[], unsigned int iov_size,
204 unsigned int *out_num, unsigned int *in_num,
205 struct vhost_log *log, unsigned int *log_num);
206void vhost_discard_vq_desc(struct vhost_virtqueue *, int n);
207
208void vhost_vq_flush(struct vhost_virtqueue *vq);
209bool vhost_vq_work_queue(struct vhost_virtqueue *vq, struct vhost_work *work);
210bool vhost_vq_has_work(struct vhost_virtqueue *vq);
211bool vhost_vq_is_setup(struct vhost_virtqueue *vq);
212int vhost_vq_init_access(struct vhost_virtqueue *);
213int vhost_add_used(struct vhost_virtqueue *, unsigned int head, int len);
214int vhost_add_used_n(struct vhost_virtqueue *, struct vring_used_elem *heads,
215 unsigned count);
216void vhost_add_used_and_signal(struct vhost_dev *, struct vhost_virtqueue *,
217 unsigned int id, int len);
218void vhost_add_used_and_signal_n(struct vhost_dev *, struct vhost_virtqueue *,
219 struct vring_used_elem *heads, unsigned count);
220void vhost_signal(struct vhost_dev *, struct vhost_virtqueue *);
221void vhost_disable_notify(struct vhost_dev *, struct vhost_virtqueue *);
222bool vhost_vq_avail_empty(struct vhost_dev *, struct vhost_virtqueue *);
223bool vhost_enable_notify(struct vhost_dev *, struct vhost_virtqueue *);
224
225int vhost_log_write(struct vhost_virtqueue *vq, struct vhost_log *log,
226 unsigned int log_num, u64 len,
227 struct iovec *iov, int count);
228int vq_meta_prefetch(struct vhost_virtqueue *vq);
229
230struct vhost_msg_node *vhost_new_msg(struct vhost_virtqueue *vq, int type);
231void vhost_enqueue_msg(struct vhost_dev *dev,
232 struct list_head *head,
233 struct vhost_msg_node *node);
234struct vhost_msg_node *vhost_dequeue_msg(struct vhost_dev *dev,
235 struct list_head *head);
236void vhost_set_backend_features(struct vhost_dev *dev, u64 features);
237
238__poll_t vhost_chr_poll(struct file *file, struct vhost_dev *dev,
239 poll_table *wait);
240ssize_t vhost_chr_read_iter(struct vhost_dev *dev, struct iov_iter *to,
241 int noblock);
242ssize_t vhost_chr_write_iter(struct vhost_dev *dev,
243 struct iov_iter *from);
244int vhost_init_device_iotlb(struct vhost_dev *d);
245
246void vhost_iotlb_map_free(struct vhost_iotlb *iotlb,
247 struct vhost_iotlb_map *map);
248
249#define vq_err(vq, fmt, ...) do { \
250 pr_debug(pr_fmt(fmt), ##__VA_ARGS__); \
251 if ((vq)->error_ctx) \
252 eventfd_signal((vq)->error_ctx);\
253 } while (0)
254
255enum {
256 VHOST_FEATURES = (1ULL << VIRTIO_F_NOTIFY_ON_EMPTY) |
257 (1ULL << VIRTIO_RING_F_INDIRECT_DESC) |
258 (1ULL << VIRTIO_RING_F_EVENT_IDX) |
259 (1ULL << VHOST_F_LOG_ALL) |
260 (1ULL << VIRTIO_F_ANY_LAYOUT) |
261 (1ULL << VIRTIO_F_VERSION_1)
262};
263
264/**
265 * vhost_vq_set_backend - Set backend.
266 *
267 * @vq Virtqueue.
268 * @private_data The private data.
269 *
270 * Context: Need to call with vq->mutex acquired.
271 */
272static inline void vhost_vq_set_backend(struct vhost_virtqueue *vq,
273 void *private_data)
274{
275 vq->private_data = private_data;
276}
277
278/**
279 * vhost_vq_get_backend - Get backend.
280 *
281 * @vq Virtqueue.
282 *
283 * Context: Need to call with vq->mutex acquired.
284 * Return: Private data previously set with vhost_vq_set_backend.
285 */
286static inline void *vhost_vq_get_backend(struct vhost_virtqueue *vq)
287{
288 return vq->private_data;
289}
290
291static inline bool vhost_has_feature(struct vhost_virtqueue *vq, int bit)
292{
293 return vq->acked_features & (1ULL << bit);
294}
295
296static inline bool vhost_backend_has_feature(struct vhost_virtqueue *vq, int bit)
297{
298 return vq->acked_backend_features & (1ULL << bit);
299}
300
301#ifdef CONFIG_VHOST_CROSS_ENDIAN_LEGACY
302static inline bool vhost_is_little_endian(struct vhost_virtqueue *vq)
303{
304 return vq->is_le;
305}
306#else
307static inline bool vhost_is_little_endian(struct vhost_virtqueue *vq)
308{
309 return virtio_legacy_is_little_endian() || vq->is_le;
310}
311#endif
312
313/* Memory accessors */
314static inline u16 vhost16_to_cpu(struct vhost_virtqueue *vq, __virtio16 val)
315{
316 return __virtio16_to_cpu(vhost_is_little_endian(vq), val);
317}
318
319static inline __virtio16 cpu_to_vhost16(struct vhost_virtqueue *vq, u16 val)
320{
321 return __cpu_to_virtio16(vhost_is_little_endian(vq), val);
322}
323
324static inline u32 vhost32_to_cpu(struct vhost_virtqueue *vq, __virtio32 val)
325{
326 return __virtio32_to_cpu(vhost_is_little_endian(vq), val);
327}
328
329static inline __virtio32 cpu_to_vhost32(struct vhost_virtqueue *vq, u32 val)
330{
331 return __cpu_to_virtio32(vhost_is_little_endian(vq), val);
332}
333
334static inline u64 vhost64_to_cpu(struct vhost_virtqueue *vq, __virtio64 val)
335{
336 return __virtio64_to_cpu(vhost_is_little_endian(vq), val);
337}
338
339static inline __virtio64 cpu_to_vhost64(struct vhost_virtqueue *vq, u64 val)
340{
341 return __cpu_to_virtio64(vhost_is_little_endian(vq), val);
342}
343#endif
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _VHOST_H
3#define _VHOST_H
4
5#include <linux/eventfd.h>
6#include <linux/vhost.h>
7#include <linux/mm.h>
8#include <linux/mutex.h>
9#include <linux/poll.h>
10#include <linux/file.h>
11#include <linux/uio.h>
12#include <linux/virtio_config.h>
13#include <linux/virtio_ring.h>
14#include <linux/atomic.h>
15#include <linux/vhost_iotlb.h>
16#include <linux/irqbypass.h>
17
18struct vhost_work;
19typedef void (*vhost_work_fn_t)(struct vhost_work *work);
20
21#define VHOST_WORK_QUEUED 1
22struct vhost_work {
23 struct llist_node node;
24 vhost_work_fn_t fn;
25 unsigned long flags;
26};
27
28/* Poll a file (eventfd or socket) */
29/* Note: there's nothing vhost specific about this structure. */
30struct vhost_poll {
31 poll_table table;
32 wait_queue_head_t *wqh;
33 wait_queue_entry_t wait;
34 struct vhost_work work;
35 __poll_t mask;
36 struct vhost_dev *dev;
37};
38
39void vhost_work_init(struct vhost_work *work, vhost_work_fn_t fn);
40void vhost_work_queue(struct vhost_dev *dev, struct vhost_work *work);
41bool vhost_has_work(struct vhost_dev *dev);
42
43void vhost_poll_init(struct vhost_poll *poll, vhost_work_fn_t fn,
44 __poll_t mask, struct vhost_dev *dev);
45int vhost_poll_start(struct vhost_poll *poll, struct file *file);
46void vhost_poll_stop(struct vhost_poll *poll);
47void vhost_poll_queue(struct vhost_poll *poll);
48void vhost_dev_flush(struct vhost_dev *dev);
49
50struct vhost_log {
51 u64 addr;
52 u64 len;
53};
54
55enum vhost_uaddr_type {
56 VHOST_ADDR_DESC = 0,
57 VHOST_ADDR_AVAIL = 1,
58 VHOST_ADDR_USED = 2,
59 VHOST_NUM_ADDRS = 3,
60};
61
62struct vhost_vring_call {
63 struct eventfd_ctx *ctx;
64 struct irq_bypass_producer producer;
65};
66
67/* The virtqueue structure describes a queue attached to a device. */
68struct vhost_virtqueue {
69 struct vhost_dev *dev;
70
71 /* The actual ring of buffers. */
72 struct mutex mutex;
73 unsigned int num;
74 vring_desc_t __user *desc;
75 vring_avail_t __user *avail;
76 vring_used_t __user *used;
77 const struct vhost_iotlb_map *meta_iotlb[VHOST_NUM_ADDRS];
78 struct file *kick;
79 struct vhost_vring_call call_ctx;
80 struct eventfd_ctx *error_ctx;
81 struct eventfd_ctx *log_ctx;
82
83 struct vhost_poll poll;
84
85 /* The routine to call when the Guest pings us, or timeout. */
86 vhost_work_fn_t handle_kick;
87
88 /* Last available index we saw. */
89 u16 last_avail_idx;
90
91 /* Caches available index value from user. */
92 u16 avail_idx;
93
94 /* Last index we used. */
95 u16 last_used_idx;
96
97 /* Used flags */
98 u16 used_flags;
99
100 /* Last used index value we have signalled on */
101 u16 signalled_used;
102
103 /* Last used index value we have signalled on */
104 bool signalled_used_valid;
105
106 /* Log writes to used structure. */
107 bool log_used;
108 u64 log_addr;
109
110 struct iovec iov[UIO_MAXIOV];
111 struct iovec iotlb_iov[64];
112 struct iovec *indirect;
113 struct vring_used_elem *heads;
114 /* Protected by virtqueue mutex. */
115 struct vhost_iotlb *umem;
116 struct vhost_iotlb *iotlb;
117 void *private_data;
118 u64 acked_features;
119 u64 acked_backend_features;
120 /* Log write descriptors */
121 void __user *log_base;
122 struct vhost_log *log;
123 struct iovec log_iov[64];
124
125 /* Ring endianness. Defaults to legacy native endianness.
126 * Set to true when starting a modern virtio device. */
127 bool is_le;
128#ifdef CONFIG_VHOST_CROSS_ENDIAN_LEGACY
129 /* Ring endianness requested by userspace for cross-endian support. */
130 bool user_be;
131#endif
132 u32 busyloop_timeout;
133};
134
135struct vhost_msg_node {
136 union {
137 struct vhost_msg msg;
138 struct vhost_msg_v2 msg_v2;
139 };
140 struct vhost_virtqueue *vq;
141 struct list_head node;
142};
143
144struct vhost_dev {
145 struct mm_struct *mm;
146 struct mutex mutex;
147 struct vhost_virtqueue **vqs;
148 int nvqs;
149 struct eventfd_ctx *log_ctx;
150 struct llist_head work_list;
151 struct task_struct *worker;
152 struct vhost_iotlb *umem;
153 struct vhost_iotlb *iotlb;
154 spinlock_t iotlb_lock;
155 struct list_head read_list;
156 struct list_head pending_list;
157 wait_queue_head_t wait;
158 int iov_limit;
159 int weight;
160 int byte_weight;
161 u64 kcov_handle;
162 bool use_worker;
163 int (*msg_handler)(struct vhost_dev *dev, u32 asid,
164 struct vhost_iotlb_msg *msg);
165};
166
167bool vhost_exceeds_weight(struct vhost_virtqueue *vq, int pkts, int total_len);
168void vhost_dev_init(struct vhost_dev *, struct vhost_virtqueue **vqs,
169 int nvqs, int iov_limit, int weight, int byte_weight,
170 bool use_worker,
171 int (*msg_handler)(struct vhost_dev *dev, u32 asid,
172 struct vhost_iotlb_msg *msg));
173long vhost_dev_set_owner(struct vhost_dev *dev);
174bool vhost_dev_has_owner(struct vhost_dev *dev);
175long vhost_dev_check_owner(struct vhost_dev *);
176struct vhost_iotlb *vhost_dev_reset_owner_prepare(void);
177void vhost_dev_reset_owner(struct vhost_dev *dev, struct vhost_iotlb *iotlb);
178void vhost_dev_cleanup(struct vhost_dev *);
179void vhost_dev_stop(struct vhost_dev *);
180long vhost_dev_ioctl(struct vhost_dev *, unsigned int ioctl, void __user *argp);
181long vhost_vring_ioctl(struct vhost_dev *d, unsigned int ioctl, void __user *argp);
182bool vhost_vq_access_ok(struct vhost_virtqueue *vq);
183bool vhost_log_access_ok(struct vhost_dev *);
184void vhost_clear_msg(struct vhost_dev *dev);
185
186int vhost_get_vq_desc(struct vhost_virtqueue *,
187 struct iovec iov[], unsigned int iov_count,
188 unsigned int *out_num, unsigned int *in_num,
189 struct vhost_log *log, unsigned int *log_num);
190void vhost_discard_vq_desc(struct vhost_virtqueue *, int n);
191
192bool vhost_vq_is_setup(struct vhost_virtqueue *vq);
193int vhost_vq_init_access(struct vhost_virtqueue *);
194int vhost_add_used(struct vhost_virtqueue *, unsigned int head, int len);
195int vhost_add_used_n(struct vhost_virtqueue *, struct vring_used_elem *heads,
196 unsigned count);
197void vhost_add_used_and_signal(struct vhost_dev *, struct vhost_virtqueue *,
198 unsigned int id, int len);
199void vhost_add_used_and_signal_n(struct vhost_dev *, struct vhost_virtqueue *,
200 struct vring_used_elem *heads, unsigned count);
201void vhost_signal(struct vhost_dev *, struct vhost_virtqueue *);
202void vhost_disable_notify(struct vhost_dev *, struct vhost_virtqueue *);
203bool vhost_vq_avail_empty(struct vhost_dev *, struct vhost_virtqueue *);
204bool vhost_enable_notify(struct vhost_dev *, struct vhost_virtqueue *);
205
206int vhost_log_write(struct vhost_virtqueue *vq, struct vhost_log *log,
207 unsigned int log_num, u64 len,
208 struct iovec *iov, int count);
209int vq_meta_prefetch(struct vhost_virtqueue *vq);
210
211struct vhost_msg_node *vhost_new_msg(struct vhost_virtqueue *vq, int type);
212void vhost_enqueue_msg(struct vhost_dev *dev,
213 struct list_head *head,
214 struct vhost_msg_node *node);
215struct vhost_msg_node *vhost_dequeue_msg(struct vhost_dev *dev,
216 struct list_head *head);
217void vhost_set_backend_features(struct vhost_dev *dev, u64 features);
218
219__poll_t vhost_chr_poll(struct file *file, struct vhost_dev *dev,
220 poll_table *wait);
221ssize_t vhost_chr_read_iter(struct vhost_dev *dev, struct iov_iter *to,
222 int noblock);
223ssize_t vhost_chr_write_iter(struct vhost_dev *dev,
224 struct iov_iter *from);
225int vhost_init_device_iotlb(struct vhost_dev *d, bool enabled);
226
227void vhost_iotlb_map_free(struct vhost_iotlb *iotlb,
228 struct vhost_iotlb_map *map);
229
230#define vq_err(vq, fmt, ...) do { \
231 pr_debug(pr_fmt(fmt), ##__VA_ARGS__); \
232 if ((vq)->error_ctx) \
233 eventfd_signal((vq)->error_ctx, 1);\
234 } while (0)
235
236enum {
237 VHOST_FEATURES = (1ULL << VIRTIO_F_NOTIFY_ON_EMPTY) |
238 (1ULL << VIRTIO_RING_F_INDIRECT_DESC) |
239 (1ULL << VIRTIO_RING_F_EVENT_IDX) |
240 (1ULL << VHOST_F_LOG_ALL) |
241 (1ULL << VIRTIO_F_ANY_LAYOUT) |
242 (1ULL << VIRTIO_F_VERSION_1)
243};
244
245/**
246 * vhost_vq_set_backend - Set backend.
247 *
248 * @vq Virtqueue.
249 * @private_data The private data.
250 *
251 * Context: Need to call with vq->mutex acquired.
252 */
253static inline void vhost_vq_set_backend(struct vhost_virtqueue *vq,
254 void *private_data)
255{
256 vq->private_data = private_data;
257}
258
259/**
260 * vhost_vq_get_backend - Get backend.
261 *
262 * @vq Virtqueue.
263 *
264 * Context: Need to call with vq->mutex acquired.
265 * Return: Private data previously set with vhost_vq_set_backend.
266 */
267static inline void *vhost_vq_get_backend(struct vhost_virtqueue *vq)
268{
269 return vq->private_data;
270}
271
272static inline bool vhost_has_feature(struct vhost_virtqueue *vq, int bit)
273{
274 return vq->acked_features & (1ULL << bit);
275}
276
277static inline bool vhost_backend_has_feature(struct vhost_virtqueue *vq, int bit)
278{
279 return vq->acked_backend_features & (1ULL << bit);
280}
281
282#ifdef CONFIG_VHOST_CROSS_ENDIAN_LEGACY
283static inline bool vhost_is_little_endian(struct vhost_virtqueue *vq)
284{
285 return vq->is_le;
286}
287#else
288static inline bool vhost_is_little_endian(struct vhost_virtqueue *vq)
289{
290 return virtio_legacy_is_little_endian() || vq->is_le;
291}
292#endif
293
294/* Memory accessors */
295static inline u16 vhost16_to_cpu(struct vhost_virtqueue *vq, __virtio16 val)
296{
297 return __virtio16_to_cpu(vhost_is_little_endian(vq), val);
298}
299
300static inline __virtio16 cpu_to_vhost16(struct vhost_virtqueue *vq, u16 val)
301{
302 return __cpu_to_virtio16(vhost_is_little_endian(vq), val);
303}
304
305static inline u32 vhost32_to_cpu(struct vhost_virtqueue *vq, __virtio32 val)
306{
307 return __virtio32_to_cpu(vhost_is_little_endian(vq), val);
308}
309
310static inline __virtio32 cpu_to_vhost32(struct vhost_virtqueue *vq, u32 val)
311{
312 return __cpu_to_virtio32(vhost_is_little_endian(vq), val);
313}
314
315static inline u64 vhost64_to_cpu(struct vhost_virtqueue *vq, __virtio64 val)
316{
317 return __virtio64_to_cpu(vhost_is_little_endian(vq), val);
318}
319
320static inline __virtio64 cpu_to_vhost64(struct vhost_virtqueue *vq, u64 val)
321{
322 return __cpu_to_virtio64(vhost_is_little_endian(vq), val);
323}
324#endif