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    Subject[PATCH v3 24/41] vhost: add memory access wrappers
    Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
    ---
    drivers/vhost/vhost.h | 33 ++++++++++++++++++++++++++++++++-
    1 file changed, 32 insertions(+), 1 deletion(-)

    diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h
    index 3eda654..b9032e8 100644
    --- a/drivers/vhost/vhost.h
    +++ b/drivers/vhost/vhost.h
    @@ -174,6 +174,37 @@ enum {

    static inline int vhost_has_feature(struct vhost_virtqueue *vq, int bit)
    {
    - return vq->acked_features & (1 << 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
    --
    MST


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