On Wed, Nov 16, 2016 at 07:05:50PM +0100, Paolo Bonzini wrote:
> @@ -1318,10 +1318,18 @@ void virtio_del_queue(VirtIODevice *vdev, int n)
> vdev->vq[n].vring.num_default = 0;
> }
>
> +static void virtio_set_isr(VirtIODevice *vdev, int value)
> +{
> + uint8_t old = atomic_read(&vdev->isr);
> + if ((old & value) != value) {
> + atomic_or(&vdev->isr, value);
> + }
> +}
> +Paolo, can you pls comment on why is it done like this, as opposed to a single atomic_or? -- MST
