Commit e05fd12b authored by Michael S. Tsirkin's avatar Michael S. Tsirkin
Browse files

vhost: add memory access wrappers 



Add guest memory access wrappers to handle virtio endianness
conversions.

Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Reviewed-by: default avatarJason Wang <jasowang@redhat.com>
Reviewed-by: default avatarCornelia Huck <cornelia.huck@de.ibm.com>
parent bd82752a

drivers/vhost/vhost.h

+31 −0
Original line number Diff line number Diff line
@@ -176,4 +176,35 @@ static inline bool vhost_has_feature(struct vhost_virtqueue *vq, int bit) 
{

	return vq->acked_features & (1ULL << bit);

}



/* Memory accessors */

static inline u16 vhost16_to_cpu(struct vhost_virtqueue *vq, __virtio16 val)

{

	return __virtio16_to_cpu(vhost_has_feature(vq, VIRTIO_F_VERSION_1), val);

}



static inline __virtio16 cpu_to_vhost16(struct vhost_virtqueue *vq, u16 val)

{

	return __cpu_to_virtio16(vhost_has_feature(vq, VIRTIO_F_VERSION_1), val);

}



static inline u32 vhost32_to_cpu(struct vhost_virtqueue *vq, __virtio32 val)

{

	return __virtio32_to_cpu(vhost_has_feature(vq, VIRTIO_F_VERSION_1), val);

}



static inline __virtio32 cpu_to_vhost32(struct vhost_virtqueue *vq, u32 val)

{

	return __cpu_to_virtio32(vhost_has_feature(vq, VIRTIO_F_VERSION_1), val);

}



static inline u64 vhost64_to_cpu(struct vhost_virtqueue *vq, __virtio64 val)

{

	return __virtio64_to_cpu(vhost_has_feature(vq, VIRTIO_F_VERSION_1), val);

}



static inline __virtio64 cpu_to_vhost64(struct vhost_virtqueue *vq, u64 val)

{

	return __cpu_to_virtio64(vhost_has_feature(vq, VIRTIO_F_VERSION_1), val);

}

#endif