Hi, > On each boot, coreboot might decide to assign a different bus id to > the extra roots (for example, if a device with a PCI bridge is > inserted and it's bus allocation causes bus ids to shift). > Technically, coreboot could even change the order extra buses are > assigned bus ids, but doesn't today. > > This was seen on several AMD systems - I'm told at least some Intel > systems have multiple root buses, but the bus numbers are just hard > wired.
This is how the qemu pxb works: root bus numbers are a config option for the root bridge device, i.e. from the guest point of view they are hard-wired. cheers, Gerd
