What the heck is the DMAR "bad RMRR" issue?!? (X299)

So my Gigabyte X299 Gaming 7 Pro with i9-10920X is poised and ready for VFIO with a modern kernel… except all kernels past 5.4 (5.5+) have the infamous “Bad RMRR” issue reported here:

With an associated bug report:


Unfortunately for my beta BIOS F3n on this board, I still have this problem on all kernels 5.5+, regardless if I flash the “Fast” or “Intact” ways. This is on Kernel 5.8.13, so this bug was not resolved at least for me. Anyone else with X299 boards with this error message?