4 * Copyright (c) 2013 Virtual Open Systems Sarl.
6 * This work is licensed under the terms of the GNU GPL, version 2 or later.
7 * See the COPYING file in the top-level directory.
11 #include "hw/virtio/vhost.h"
12 #include "hw/virtio/vhost-backend.h"
13 #include "qemu/error-report.h"
15 #include <sys/ioctl.h>
17 extern const VhostOps user_ops
;
19 static int vhost_kernel_call(struct vhost_dev
*dev
, unsigned long int request
,
22 int fd
= (uintptr_t) dev
->opaque
;
24 assert(dev
->vhost_ops
->backend_type
== VHOST_BACKEND_TYPE_KERNEL
);
26 return ioctl(fd
, request
, arg
);
29 static int vhost_kernel_init(struct vhost_dev
*dev
, void *opaque
)
31 assert(dev
->vhost_ops
->backend_type
== VHOST_BACKEND_TYPE_KERNEL
);
38 static int vhost_kernel_cleanup(struct vhost_dev
*dev
)
40 int fd
= (uintptr_t) dev
->opaque
;
42 assert(dev
->vhost_ops
->backend_type
== VHOST_BACKEND_TYPE_KERNEL
);
47 static const VhostOps kernel_ops
= {
48 .backend_type
= VHOST_BACKEND_TYPE_KERNEL
,
49 .vhost_call
= vhost_kernel_call
,
50 .vhost_backend_init
= vhost_kernel_init
,
51 .vhost_backend_cleanup
= vhost_kernel_cleanup
54 int vhost_set_backend_type(struct vhost_dev
*dev
, VhostBackendType backend_type
)
58 switch (backend_type
) {
59 case VHOST_BACKEND_TYPE_KERNEL
:
60 dev
->vhost_ops
= &kernel_ops
;
62 case VHOST_BACKEND_TYPE_USER
:
63 dev
->vhost_ops
= &user_ops
;
66 error_report("Unknown vhost backend type\n");