list iommu groups

list-iommu-groups

#!/bin/bash

shopt -s nullglob
for g in $(ls /sys/kernel/iommu_groups); do 
    echo "IOMMU Group $g"

    for d in /sys/kernel/iommu_groups/$g/devices/*; do 
        n=${d#*/iommu_groups/*}; n=${n%%/*}
        ret=`lspci -nns "${d##*/}"`

        echo "    $ret"
    done;
done;