RE: [virtio-comment] Re: [PATCH v1 3/8] device-context: Define the device context fields for device migration

[Parav Pandit <parav@nvidia.com>]

> From: Michael S. Tsirkin <mst@redhat.com>
> Sent: Thursday, October 12, 2023 3:36 PM
> 
> On Thu, Oct 12, 2023 at 06:00:09PM +0800, Zhu, Lingshan wrote:
> > we are talking about nested, don't break nested
> 
> Yes, and I agree a "simulated VF" is a kind of hack at least for now. What I could
> see instead is one or both of
> 1 another way to submit admin commands without DMA
> 2 a way to have a "dummy" PF that only does admin
>   commands without anything device specific

Yes. both the methods make send to me.
But I think, it will still do the DMA at the end for device context, dirty page addresses.
I was imagining, AQ on the VF itself to do some of these commands, that way both methods can utilize common framework.

Another VF exposed as the dummy PF should work fine maintaining most semantics.