Re: [RFC v2 7/9] virito-pci: implement queue_enabled method

[Philippe Mathieu-Daudé]

Typo "virtio-pci" in patch subject.

On 5/8/20 6:32 PM, Cindy Lu wrote:
> From: Jason Wang <address@hidden>
>
> With version 1, we can detect whether a queue is enabled via
> queue_enabled.
>
> Signed-off-by: Jason Wang <address@hidden>
> ---
>   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 c6b47a9c73..4aaf5d953e 100644
> --- a/hw/virtio/virtio-pci.c
> +++ b/hw/virtio/virtio-pci.c
> @@ -1103,6 +1103,18 @@ 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)
>   {
> @@ -2053,6 +2065,7 @@ 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 = {