IOMMU group identification

lsiommugroups.bash

#!/bin/bash

# I have no idea where I got this script, possibly here:
#   https://wiki.archlinux.org/index.php/PCI_passthrough_via_OVMF

for d in /sys/kernel/iommu_groups/*/devices/* ; do 
  n=${d#*/iommu_groups/*}
  n=${n%%/*}
  printf 'IOMMU Group %s ' "$n"
  lspci -nns "${d##*/}"
done