On Wed, Mar 11, 2020 at 11:58:57AM +1100, David Gibson wrote: > Note that several things that I believe are now in the PCIe spec, but > really derive more from PC legacy considerations, don't apply at all > for PAPR. e.g. there's no meaningful distinction between integrated > and slotted devices, multiple independent host bridges is routine and > doesn't require any (virtual) hardware visible domain numbers.
Domain numbers are a Linux thing, not a PCIe thing. On x86 they come from ACPI segment numbers. As such they aren't usually hardware visible on x86, they are supplied by firmware. -- MST
