On Friday 22 June 2012, Bjorn Helgaas wrote: > The requirement (if there is one) isn't anything related to PC-ness. > I just don't understand how things can actually work if two host > bridges both claim the same bus number. If we do a config read to > that bus, both bridges should claim it and turn it into config cycles > on their respective root buses, and we should get two responses. I > would expect the second response to cause an "unexpected response" > machine check or similar. But each PCI domain has its own config space, so if you do a config read for one bus, it's always relative to the domain. The part that is specific to PCs is that they don't have PCI domains normally. Arnd -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
