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| author | Xuan Zhuo <xuanzhuo@linux.alibaba.com> | 2022-08-01 09:38:35 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2022-08-11 11:06:39 +0300 |
| commit | af36b16f6c1e51975a3815eb21c21c47f3114393 (patch) | |
| tree | a38f0e5fc884f281a68fdd4ecf0abe7c25417483 /drivers/virtio/virtio_ring.c | |
| parent | e5175b419a1394e77ff418dd9bfaf15555dfe594 (diff) | |
| download | linux-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/virtio_ring.c')
| -rw-r--r-- | drivers/virtio/virtio_ring.c | 10 |
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; } |