Thread (82 messages) 82 messages, 3 authors, 2022-07-18

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;
  
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