[SeaBIOS] [RFC v3] pciinit: setup mcfg for pxb-pcie to support multiple pci domains

[Gerd Hoffmann]

  Hi,

> > I'm curious; what does tape backup have to do with the number of PCI
> > slots/busses?
> 
> I'm not very clear about how tape works in qemu, but the problem is pcie
> devices under q35. The pcie topology requires one device per bus, therefore
> the 256 bus might not be enough if we have many pcie devices.

Note that you can have multifunction pcie devices. so you can have up to
8 per pcie slot.  Which allows close to 2000 devices.  Limitation: They
are not individually hotpluggable.

cheers,
  Gerd