I recently flashed coreboot on my X220 (and it worked surprisingly enough). However, I couldn't find any solid guides on how to set up TianoCore (UEFI) as a payload -- does Qubes require Trusted Boot to be supported on their platforms (I would hope so)? And if so, is there any documentation on how to set up TianoCore as a payload (the documentation is _sparse_ at best, with weird references to VBOOT2 and U-Boot)?
Otherwise I'm not sure how a vendor could fulfill both sets of requirements.