Re: [PATCH v1 04/10] virtio-pci: implement queue_enabled method

[Laurent Vivier]

On 22/06/2020 17:37, Cindy Lu wrote:
> 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>
> Signed-off-by: Cindy Lu <lulu@redhat.com>
> ---
>  hw/virtio/virtio-pci.c | 18 ++++++++++++++++++
>  1 file changed, 18 insertions(+)
> 
> diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
> index 4cb784389c..3918aa9f6c 100644
> --- a/hw/virtio/virtio-pci.c
> +++ b/hw/virtio/virtio-pci.c
> @@ -1107,6 +1107,23 @@ static AddressSpace *virtio_pci_get_dma_as(DeviceState 
> *d)
>      return pci_get_address_space(dev);
>  }
>  
> +static bool  virtio_queue_check_enabled(VirtIODevice *vdev, int n)
> +{
> +    return  virtio_queue_get_desc_addr(vdev, n) != 0;
> +}

This function is already defined under a different name in
hw/virtio/virtio.c:


   3287 bool virtio_queue_enabled(VirtIODevice *vdev, int n)
   3288 {
   3289     return virtio_queue_get_desc_addr(vdev, n) != 0;
   3290 }

As this file includes "hw/virtio/virtio.h" you can use it directly.

Thanks,
Laurent