Re: [PATCH v8] xen/pt: reserve PCI slot 2 for Intel igd-passthru

[Igor Mammedov <imammedo@redhat.com>]

On Thu, 12 Jan 2023 23:14:26 -0500
Chuck Zmudzinski <brchuckz@aol.com> wrote:

> On 1/12/23 6:03 PM, Michael S. Tsirkin wrote:
> > On Thu, Jan 12, 2023 at 10:55:25PM +0000, Bernhard Beschow wrote:  
> >> I think the change Michael suggests is very minimalistic: Move the if
> >> condition around xen_igd_reserve_slot() into the function itself and
> >> always call it there unconditionally -- basically turning three lines
> >> into one. Since xen_igd_reserve_slot() seems very problem specific,
> >> Michael further suggests to rename it to something more general. All
> >> in all no big changes required.  
> > 
> > yes, exactly.
> >   
> 
> OK, got it. I can do that along with the other suggestions.

have you considered instead of reservation, putting a slot check in device model
and if it's intel igd being passed through, fail at realize time  if it can't take
required slot (with a error directing user to fix command line)?
That could be less complicated than dealing with slot reservations at the cost of
being less convenient.

> 
> Thanks.
>