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[RFC v3 4/8] virtio-pci: implement queue_enabled method
From: |
Cindy Lu |
Subject: |
[RFC v3 4/8] virtio-pci: implement queue_enabled method |
Date: |
Fri, 29 May 2020 22:06:16 +0800 |
From: Jason Wang <jasowang@redhat.com>
With version 1, we can detect whether a queue is enabled via
queue_enabled.
Signed-off-by: Jason Wang <jasowang@redhat.com>
---
hw/virtio/virtio-pci.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
index 4cb784389c..2c82ed5246 100644
--- a/hw/virtio/virtio-pci.c
+++ b/hw/virtio/virtio-pci.c
@@ -1107,6 +1107,18 @@ static AddressSpace *virtio_pci_get_dma_as(DeviceState
*d)
return pci_get_address_space(dev);
}
+static bool virtio_pci_queue_enabled(DeviceState *d, int n)
+{
+ VirtIOPCIProxy *proxy = VIRTIO_PCI(d);
+ VirtIODevice *vdev = virtio_bus_get_device(&proxy->bus);
+
+ if (virtio_vdev_has_feature(vdev, VIRTIO_F_VERSION_1)) {
+ return proxy->vqs[vdev->queue_sel].enabled;
+ }
+
+ return virtio_queue_get_desc_addr(vdev, n) != 0;
+}
+
static int virtio_pci_add_mem_cap(VirtIOPCIProxy *proxy,
struct virtio_pci_cap *cap)
{
@@ -2059,6 +2071,7 @@ static void virtio_pci_bus_class_init(ObjectClass *klass,
void *data)
k->ioeventfd_enabled = virtio_pci_ioeventfd_enabled;
k->ioeventfd_assign = virtio_pci_ioeventfd_assign;
k->get_dma_as = virtio_pci_get_dma_as;
+ k->queue_enabled = virtio_pci_queue_enabled;
}
static const TypeInfo virtio_pci_bus_info = {
--
2.21.1
- [RFC v3 0/8] vDPA support in qemu, Cindy Lu, 2020/05/29
- [RFC v3 1/8] net: introduce qemu_get_peer, Cindy Lu, 2020/05/29
- [RFC v3 2/8] vhost_net: use the function qemu_get_peer, Cindy Lu, 2020/05/29
- [RFC v3 3/8] virtio-bus: introduce queue_enabled method, Cindy Lu, 2020/05/29
- [RFC v3 4/8] virtio-pci: implement queue_enabled method,
Cindy Lu <=
- [RFC v3 5/8] vhost: introduce vhost_set_vring_ready method, Cindy Lu, 2020/05/29
- [RFC v3 6/8] vhost-backend: export the vhost backend helper, Cindy Lu, 2020/05/29
- [RFC v3 7/8] vhost-vdpa: introduce vhost-vdpa backend, Cindy Lu, 2020/05/29
- [RFC v3 8/8] vhost-vdpa: introduce vhost-vdpa net client, Cindy Lu, 2020/05/29
- Re: [RFC v3 0/8] vDPA support in qemu, no-reply, 2020/05/29
- Re: [RFC v3 0/8] vDPA support in qemu, no-reply, 2020/05/29
- Re: [RFC v3 0/8] vDPA support in qemu, no-reply, 2020/05/29