RE: [PATCH v10 4/4] transport-pci: Introduce group legacy group member config region access

[Parav Pandit <parav@nvidia.com>]

> From: Michael S. Tsirkin <mst@redhat.com>
> Sent: Thursday, July 6, 2023 3:43 PM

> > > As the order is there anyway, why not just prescribe entries are used in
> order?
> >
> > I don't see any value in defining any order. It is an array of entries not a priority
> list.
> 
> I think we are losing out. For example I can see how access through member
> would be preferable for ordering reasons.
> However device might still allow access through PF for cases where driver can't
> access VF.
> 
So a driver can choose say I prefer order over accessibility over VF, so it choose PF.
Device doesn't have the knowledge anyway whether driver can/cannot access the VF.
So, device's preference vs driver's preference may be different.

> But I don't see any configs where leaving this to the driver's discretion is
> preferable. If you see one let me know.

In doesn't need to be config.
It is the environment that chooses which is preferred by the driver.
For example preference of accessibility over ordering.