RE: [virtio-comment] [PATCH requirements 1/7] net-features: Add requirements document for release 1.4

[Parav Pandit <parav@nvidia.com>]

> From: Michael S. Tsirkin <mst@redhat.com>
> Sent: Wednesday, June 7, 2023 4:36 PM
> 
> On Tue, Jun 06, 2023 at 11:08:12PM +0000, Parav Pandit wrote:
> > We can debate and change from cvq to new cfgvq as part of the journey.
> > It is fine.
> 
> Just to stress, cvq has a bunch of drawbacks. For example it is hard to access
> from the hypervisor since it's DMA from VF.
> This is why I think our direction should be to add a vq transport that does all
> config accesses over admin commands.
We debate this before, so will write is below.
> Or maybe I'm wrong.
> 

> But, let's distinguish between requirements, and between requirements and
> design. Getting supported counters is a requirement.
> Doing this over cvq is a design. Reducing MMIO registers is a requirement. OK?

Yes, I would write it as reducing MMIO and accessing it over vq of the own device is a requirement.