Commit b2a5f62a authored Jul 01, 2020 by Jason Wang Committed by Michael S. Tsirkin Jul 03, 2020

virtio-bus: introduce queue_enabled method



This patch introduces queue_enabled() method which allows the
transport to implement its own way to report whether or not a queue is
enabled.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Cindy Lu <lulu@redhat.com>
Message-Id: <20200701145538.22333-4-lulu@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>

parent 92fbc3e0

hw/virtio/virtio.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -3286,6 +3286,12 @@ hwaddr virtio_queue_get_desc_addr(VirtIODevice *vdev, int n)

		bool virtio_queue_enabled(VirtIODevice *vdev, int n)
		{
		BusState *qbus = qdev_get_parent_bus(DEVICE(vdev));
		VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);

		if (k->queue_enabled) {
		return k->queue_enabled(qbus->parent, n);
		}
		return virtio_queue_get_desc_addr(vdev, n) != 0;
		}

include/hw/virtio/virtio-bus.h

+4 −0

Original line number	Diff line number	Diff line
		@@ -83,6 +83,10 @@ typedef struct VirtioBusClass {
		*/
		int (ioeventfd_assign)(DeviceState d, EventNotifier *notifier,
		int n, bool assign);
		/*
		* Whether queue number n is enabled.
		*/
		bool (queue_enabled)(DeviceState d, int n);
		/*
		* Does the transport have variable vring alignment?
		* (ie can it ever call virtio_queue_set_align()?)