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

Gerd Hoffmann kraxel at redhat.com
Mon Oct 1 06:42:50 CEST 2018


> > 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.


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