[PATCH v14 15/42] virtio_ring: split: reserve vring_align, may_reduce_num
From: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Date: 2022-08-01 06:40:56
Also in:
bpf, kvm, linux-remoteproc, linux-s390, linux-um, netdev, platform-driver-x86
Subsystem:
the rest, virtio core · Maintainers:
Linus Torvalds, "Michael S. Tsirkin", Jason Wang
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> --- drivers/virtio/virtio_ring.c | 10 ++++++++++ 1 file changed, 10 insertions(+)
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; }
--
2.31.0
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