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authorXuan Zhuo <xuanzhuo@linux.alibaba.com>2022-08-01 09:38:35 +0300
committerMichael S. Tsirkin <mst@redhat.com>2022-08-11 11:06:39 +0300
commitaf36b16f6c1e51975a3815eb21c21c47f3114393 (patch)
treea38f0e5fc884f281a68fdd4ecf0abe7c25417483 /drivers/virtio
parente5175b419a1394e77ff418dd9bfaf15555dfe594 (diff)
downloadlinux-af36b16f6c1e51975a3815eb21c21c47f3114393.tar.xz
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: 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>
Diffstat (limited to 'drivers/virtio')
-rw-r--r--drivers/virtio/virtio_ring.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index 948f8da7b780..8cbb19cdb1ce 100644
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -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;
}