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authorKangjie Xu <kangjie.xu@linux.alibaba.com>2022-10-17 17:25:46 +0800
committerMichael S. Tsirkin <mst@redhat.com>2022-11-07 13:12:20 -0500
commit3c37f8b8d1e5f524c9d04d3e1d8125334e93e2eb (patch)
tree07e1d85ee6ff0542d6c7393b80abf64d16456699 /hw/virtio
parentb3a8d6f431730858162feb2dfcee85d0f3484992 (diff)
virtio: introduce virtio_queue_enable()
Introduce the interface queue_enable() in VirtioDeviceClass and the fucntion virtio_queue_enable() in virtio, it can be called when VIRTIO_PCI_COMMON_Q_ENABLE is written and related virtqueue can be started. It only supports the devices of virtio 1 or later. The not-supported devices can only start the virtqueue when DRIVER_OK. Signed-off-by: Kangjie Xu <kangjie.xu@linux.alibaba.com> Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by: Jason Wang <jasowang@redhat.com> Message-Id: <20221017092558.111082-4-xuanzhuo@linux.alibaba.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/virtio')
-rw-r--r--hw/virtio/virtio.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index cf5f9ca387..9683b2e158 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -2495,6 +2495,20 @@ void virtio_queue_reset(VirtIODevice *vdev, uint32_t queue_index)
__virtio_queue_reset(vdev, queue_index);
}
+void virtio_queue_enable(VirtIODevice *vdev, uint32_t queue_index)
+{
+ VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev);
+
+ if (!virtio_vdev_has_feature(vdev, VIRTIO_F_VERSION_1)) {
+ error_report("queue_enable is only suppported in devices of virtio "
+ "1.0 or later.");
+ }
+
+ if (k->queue_enable) {
+ k->queue_enable(vdev, queue_index);
+ }
+}
+
void virtio_reset(void *opaque)
{
VirtIODevice *vdev = opaque;