Re: [virtio-dev] [PATCH 08/11] transport-pci: Introduce virtio extended capability

[Parav Pandit <parav@nvidia.com>]

On 4/11/2023 3:00 AM, Michael S. Tsirkin wrote:

> > I meant, it depends on the capability semantics. Both PASID and legacy
> > MMIO don't need to be accessed by BIOS. We can't change legacy BIOS to
> > use legacy MMIO bars.
> >
> > Thanks
>
> makes sense.
>
>
> now, imagine someone building a new device. if existing drivers are not
> a concern, it is possible to move capabilities all to extended space. is
> that possible while keeping the bios working?
unlikely as bios is looking in the legacy section.

New capabilities like legacy (and pasid) has no backward compat 
requirement from bios and drivers.
so they can start from new.