Hi @brochard
Qubes is a really interesting project, but right now we do not have a fully open source boot firmware, as the bios region is closed.
I am still interested in working towards a coreboot+tianocore payload that could run on the system which would be the first requirement to get certified.
One additional hurtle would be getting the Intel sensor hub firmware open source, as this is also a closed source blob, it could also be removed for something like Qubes support, but this would disable the ALS and IMU sensors. (Probably not a big deal).