PCI Quirk on AGESA 1.0.0.3 ABB

ASRock shipped 3.60 bios for Taichi x470 with AGESA Combo-AM4 1.0.0.3 ABB.

Any brave souls could tell us if they fixed 127 error then starting VM with GPU passthrough?

More info about problem:
AGESA 0072 problem reddit post

Try the P3.50 BIOS. For ESXi, the PCIe issues from the initial BIOS release for Ryzen 3000 series is at least working, so hopefully VFIO is working as well (?)

Yes, but read this reddit thread.