lkml.org 
[lkml]   [2014]   [Nov]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
SubjectRe: [PATCH v6 29/46] vhost: add memory access wrappers


On Fri, Nov 28, 2014 at 4:10 AM, Michael S. Tsirkin <mst@redhat.com>
wrote:
> Add guest memory access wrappers to handle virtio endianness
> conversions.
>
> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
> ---
> drivers/vhost/vhost.h | 31 +++++++++++++++++++++++++++++++
> 1 file changed, 31 insertions(+)
>
> diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h
> index c624b09..1f321fd 100644
> --- a/drivers/vhost/vhost.h
> +++ b/drivers/vhost/vhost.h
> @@ -176,4 +176,35 @@ static inline int 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
> --
> MST

Reviewed-by: Jason Wang <jasowang@redhat.com>


\
 
 \ /
  Last update: 2014-11-28 10:01    [W:0.173 / U:5.424 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site