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vhost: introduce vhost_is_little_endian() helper

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Signed-off-by: Greg Kurz <[email protected]>

Signed-off-by: Michael S. Tsirkin <[email protected]>
Acked-by: Cornelia Huck <[email protected]>
Reviewed-by: David Gibson <[email protected]>
This commit is contained in:
Greg Kurz 2015-04-24 14:25:12 +02:00 • committed by Michael S. Tsirkin
commit ab27c07f60
1 changed files with 11 additions and 6 deletions
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17
drivers/vhost/vhost.h
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@ -173,34 +173,39 @@ static inline bool vhost_has_feature(struct vhost_virtqueue *vq, int bit)
return vq->acked_features & (1ULL << bit);
}
static inline bool vhost_is_little_endian(struct vhost_virtqueue *vq)
{
return vhost_has_feature(vq, VIRTIO_F_VERSION_1);
}
/* 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);
return __virtio16_to_cpu(vhost_is_little_endian(vq), 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);
return __cpu_to_virtio16(vhost_is_little_endian(vq), 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);
return __virtio32_to_cpu(vhost_is_little_endian(vq), 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);
return __cpu_to_virtio32(vhost_is_little_endian(vq), 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);
return __virtio64_to_cpu(vhost_is_little_endian(vq), 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);
return __cpu_to_virtio64(vhost_is_little_endian(vq), val);
}
#endif