From e05fd12b388b1356f753ca54445551cb1de03386 Mon Sep 17 00:00:00 2001 From: "Michael S. Tsirkin" Date: Fri, 24 Oct 2014 11:48:17 +0300 Subject: vhost: add memory access wrappers Add guest memory access wrappers to handle virtio endianness conversions. Signed-off-by: Michael S. Tsirkin Reviewed-by: Jason Wang Reviewed-by: Cornelia Huck --- drivers/vhost/vhost.h | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) (limited to 'drivers/vhost/vhost.h') diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h index 55a95c9..a0a6c98 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 -- cgit v1.1