[vfio-users] Legacy IGD passthrough in QEMU 5

[Shakil Shaikh]

I had a working legacy IGD PT that no longer works fully. A VM will start (and the IGD accessible eg via Remote desktop), but there will be no display on the connected monitor.

After poking around, it seems that at the very least the vfio-pci-igd-lpc-bridge isn't being created automatically anymore. Furthermore, passing a romfile hangs the starting of the VM altogether.

Regarding the following commit:

https://github.com/qemu/qemu/commit/29d62771c81d8fd244a67c14a1d968c268d3fb19

Does this mean that the legacy IGD PT feature now needs to be enabled at compile time?

Is it possible to confirm this flag this on a pre-compiled binary?

Thanks