diff options
author | Michael S. Tsirkin <mst@redhat.com> | 2014-10-24 11:48:17 +0300 |
---|---|---|
committer | Michael S. Tsirkin <mst@redhat.com> | 2014-12-09 12:05:29 +0200 |
commit | e05fd12b388b1356f753ca54445551cb1de03386 (patch) | |
tree | fbadbc906df4d1ac4d16c1ae18247213ffb029ba /drivers | |
parent | bd82752a831bc3c7a66b59572f82e06154f19e27 (diff) |
vhost: add memory access wrappers
Add guest memory access wrappers to handle virtio endianness
conversions.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/vhost/vhost.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h index 55a95c976f48..a0a6c9857dd4 100644 --- a/drivers/vhost/vhost.h +++ b/drivers/vhost/vhost.h @@ -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 |