Re: [Qemu-devel] [RFC 3/3] acpi-build: allocate mcfg for multiple host bridges

[Marcel Apfelbaum]

On 05/22/2018 09:03 AM, Zihan Yang wrote:
> > An interesting point is if we want to limit the MMFCG size for PXBs, 
> as we may not be
> > interested to use all the buses in a specific domain.
>
> OK, perhaps providing an option for the user to specify the desired 
> bus numbers?

Right, specifying the number of buses that can be used (e.g: max_busses) 
will decrease a lot
the amount of address space we have to reserve.

> > For each bus we require some address space that remains unused.
>
> Does this mean we should reserve some slots in a bus, or reduce
> the number of buses used in each domain?

Limit the number of buses per PCI domain (excluding PCI domain 0, of course)

> > [Adding Laszlo for his insights]
> > Looking forward to see the SeaBIOS patches :)
>
> I appreciate your reviews, I'll write the rest part as soon as possible.

Thanks,
Marcel

> Thanks