Re: [PATCH v11 13/40] virtio_ring: split: reserve vring_align, may_reduce_num
From: Jason Wang <jasowang@redhat.com>
Date: 2022-07-01 09:03:43
Also in:
bpf, kvm, linux-remoteproc, linux-s390, linux-um, platform-driver-x86, virtualization
在 2022/6/29 14:56, Xuan Zhuo 写道:
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>
quoted hunk ↗ jump to hunk
--- 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 4c8972da5423..9c83c5e6d5a9 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 {@@ -1098,6 +1105,8 @@ 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.queue_dma_addr; to_vvq(vq)->split.queue_size_in_bytes = vring.queue_size_in_bytes; to_vvq(vq)->we_own_ring = true;