Commit af36b16f authored by Xuan Zhuo's avatar Xuan Zhuo Committed by Michael S. Tsirkin
Browse files

virtio_ring: split: reserve vring_align, may_reduce_num 



In vring_alloc_queue_split() save vring_align, may_reduce_num to
structure vring_virtqueue_split. Used to create a new vring when
implementing resize.

Signed-off-by: default avatarXuan Zhuo <xuanzhuo@linux.alibaba.com>
Acked-by: default avatarJason Wang <jasowang@redhat.com>
Message-Id: <20220801063902.129329-16-xuanzhuo@linux.alibaba.com>
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent e5175b41

drivers/virtio/virtio_ring.c

+10 −0
Original line number Diff line number Diff line
@@ -105,6 +105,13 @@ struct vring_virtqueue_split { 
	/* DMA address and size information */

	dma_addr_t queue_dma_addr;

	size_t queue_size_in_bytes;



	/*

	 * The parameters for creating vrings are reserved for creating new

	 * vring.

	 */

	u32 vring_align;

	bool may_reduce_num;

};



struct vring_virtqueue_packed {
@@ -1068,6 +1075,9 @@ static int vring_alloc_queue_split(struct vring_virtqueue_split *vring_split, 
	vring_split->queue_dma_addr = dma_addr;

	vring_split->queue_size_in_bytes = vring_size(num, vring_align);



	vring_split->vring_align = vring_align;

	vring_split->may_reduce_num = may_reduce_num;



	return 0;

}