Can someone WITH the board get a listing of the IOMMU groupings so we can see if GB did a good job or not in the BIOS? These determine how easily you can do VM passthrough of GPUs and the like. I doubt I am the only virtualisation fan who needs to know this before buying this board and a Threadripper.
To check these (and SHARE them here
of course) you need to:
Enable IOMMU in BIOS
Boot a Linux machine (USB stick boot is fine so a USB stick of 8Gb or so with Ubuntu live install would be fine)
Make sure you boot with kernel options including "amd_iommu=on" otherwise it wont be enable in OS, just BIOS
Run this as a script:
#!/bin/bash
shopt -s nullglob
for d in /sys/kernel/iommu_groups/*/devices/*; do
n=${d#*/iommu_groups/*}; n=${n%%/*}
printf 'IOMMU Group %s ' "$n"
lspci -nns "${d##*/}"
done;
Share your results, please
