On Fri, Mar 03, 2017 at 01:40:27PM +0800, Wei Wang wrote:
> From: Liang Li <liang.z.li@xxxxxxxxx>
>
> Add a new feature bit, VIRTIO_BALLOON_F_CHUNK_TRANSFER. Please check
> the implementation patch commit for details about this feature.
better squash into next patch.
> Signed-off-by: Liang Li <liang.z.li@xxxxxxxxx>
> Signed-off-by: Wei Wang <wei.w.wang@xxxxxxxxx>
> Cc: Michael S. Tsirkin <mst@xxxxxxxxxx>
> Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx>
> Cc: Cornelia Huck <cornelia.huck@xxxxxxxxxx>
> Cc: Amit Shah <amit.shah@xxxxxxxxxx>
> Cc: Dave Hansen <dave.hansen@xxxxxxxxx>
> Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
> Cc: David Hildenbrand <david@xxxxxxxxxx>
> Cc: Liang Li <liliang324@xxxxxxxxx>
> Cc: Wei Wang <wei.w.wang@xxxxxxxxx>
> ---
> include/uapi/linux/virtio_balloon.h | 12 ++++++++++++
> 1 file changed, 12 insertions(+)
>
> diff --git a/include/uapi/linux/virtio_balloon.h b/include/uapi/linux/virtio_balloon.h
> index 343d7dd..ed627b2 100644
> --- a/include/uapi/linux/virtio_balloon.h
> +++ b/include/uapi/linux/virtio_balloon.h
> @@ -34,10 +34,14 @@
> #define VIRTIO_BALLOON_F_MUST_TELL_HOST 0 /* Tell before reclaiming pages */
> #define VIRTIO_BALLOON_F_STATS_VQ 1 /* Memory Stats virtqueue */
> #define VIRTIO_BALLOON_F_DEFLATE_ON_OOM 2 /* Deflate balloon on OOM */
> +#define VIRTIO_BALLOON_F_CHUNK_TRANSFER 3 /* Transfer pages in chunks */
>
> /* Size of a PFN in the balloon interface. */
> #define VIRTIO_BALLOON_PFN_SHIFT 12
>
> +/* Shift to get a chunk size */
> +#define VIRTIO_BALLOON_CHUNK_SIZE_SHIFT 12
> +
> struct virtio_balloon_config {
> /* Number of pages host wants Guest to give up. */
> __u32 num_pages;
> @@ -82,4 +86,12 @@ struct virtio_balloon_stat {
> __virtio64 val;
> } __attribute__((packed));
>
> +/* Response header structure */
> +struct virtio_balloon_resp_hdr {
> + u8 cmd;
> + u8 flag;
> + __le16 id; /* cmd id */
> + __le32 data_len; /* Payload len in bytes */
> +};
> +
> #endif /* _LINUX_VIRTIO_BALLOON_H */
> --
> 2.7.4
