Evgeny Zinoviev has posted comments on this change. ( https://review.coreboot.org/28380 )
Change subject: [WIP] Nvidia Optimus support for ThinkPads ......................................................................
Patch Set 7:
Just some additional information if someone finds it useful: nvidia proprietary driver won't work unless the _ROM method is implemented. This is true even for qemu/kvm guest to which you can pass the pci-rom argument. That is sufficient for nouveau though.
Related threads: https://old.reddit.com/r/VFIO/comments/6q7bf5/short_report_wip_got_the_nvidi... https://github.com/jscinoz/optimus-vfio-docs
Thanks, I'll check this.