On Mon, Jan 25, 2021 at 11:49 AM Jason Gunthorpe <jgg@nvidia.com> wrote:

> I've never seen someone implement a NumVF > 256 by co-opting the bus
> number.

Usually the VF offset already places the VF routing IDs into a
different bus number range from the PF. That much at least works
today.

> Can Linux even assign more bus numbers to a port without firmware
> help? Bus numbers are something that requires the root complex to be
> aware of to setup routability.

I'm not sure, presumably something already infers this for the first
additional bus number based on the SR-IOV config capability?

Regards,
Edwin Peer