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virtio_ring: split: reserve vring_align, may_reduce_num

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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: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20220801063902.129329-16-xuanzhuo@linux.alibaba.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Xuan Zhuo 2022-08-01 14:38:35 +08:00 committed by Michael S. Tsirkin
parent e5175b419a
commit af36b16f6c
1 changed files with 10 additions and 0 deletions
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10
drivers/virtio/virtio_ring.c
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@ -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;
}