Add print-iommu-groups script

print-iommu-groups

@@ -0,0 +1,7 @@
+#!/bin/bash
+shopt -s nullglob
+for d in /sys/kernel/iommu_groups/{0..999}/devices/*; do
+    n=${d#*/iommu_groups/*}; n=${n%%/*}
+    printf 'IOMMU Group %s ' "$n"
+    lspci -nns "${d##*/}"
+done