On Fri, Nov 28, 2014 at 4:10 AM, Michael S. Tsirkin <mst@xxxxxxxxxx>
wrote:
Add guest memory access wrappers to handle virtio endianness
conversions.
Signed-off-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
---
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@xxxxxxxxxx>
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