[PATCH v12 13/40] virtio_ring: split: reserve vring_align, may_reduce_num
From: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Date: 2022-07-20 03:06:50
Also in:
bpf, kvm, linux-remoteproc, linux-s390, linux-um, platform-driver-x86, virtualization
Subsystem:
the rest, virtio core · Maintainers:
Linus Torvalds, "Michael S. Tsirkin", Jason Wang
In vring_create_virtqueue_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 | 9 +++++++++ 1 file changed, 9 insertions(+)
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index 2d5e8aec6685..6de1129e2aa6 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 {
@@ -1099,6 +1106,8 @@ static struct virtqueue *vring_create_virtqueue_split( return NULL; } + to_vvq(vq)->split.vring_align = vring_align; + to_vvq(vq)->split.may_reduce_num = may_reduce_num; to_vvq(vq)->split.queue_dma_addr = vring_split.queue_dma_addr; to_vvq(vq)->split.queue_size_in_bytes = vring_split.queue_size_in_bytes; to_vvq(vq)->we_own_ring = true;
--
2.31.0