Stefan Reinauer has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/42238 )
Change subject: Revert "Redo testbios utility to use all of YABEL" ......................................................................
Patch Set 1: Code-Review-1
I think this revert would be a mistake. The purpose of the testbios utility was to get something in userspace that is comparable to what coreboot does.
The old utility was a complete (or rather, incomplete) implementation based on copy and pasted cr*p from various projects in the field. It would not work on anything but x86, too.
I would much rather see that not go back into the tree, especially in a time when vgabios is virtually dead anyways (What system do you have that this is actually useful to you?)