On 2020/5/9 上午12:32, Cindy Lu wrote:
From: Jason Wang <jasow...@redhat.com>
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 <jasow...@redhat.com>
This patch should come before any of the vhost-vpda patch.
Thanks
---
hw/virtio/virtio.c | 6 ++++++
include/hw/virtio/virtio-bus.h | 4 ++++
2 files changed, 10 insertions(+)
diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
index 04716b5f6c..09732a8836 100644
--- a/hw/virtio/virtio.c
+++ b/hw/virtio/virtio.c
@@ -3169,6 +3169,12 @@ 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;
}
diff --git a/include/hw/virtio/virtio-bus.h b/include/hw/virtio/virtio-bus.h
index 38c9399cd4..0f6f215925 100644
--- a/include/hw/virtio/virtio-bus.h
+++ b/include/hw/virtio/virtio-bus.h
@@ -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()?)