diff --git a/ls-iommu.sh b/ls-iommu.sh
new file mode 100755
index 0000000..326de2a
--- /dev/null
+++ b/ls-iommu.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+for d in /sys/kernel/iommu_groups/*/devices/*; do
+  n=${d#*/iommu_groups/*}; n=${n%%/*}
+  printf '%s ' "$n"
+  lspci -nns "${d##*/}"
+done
diff --git a/utilities/utilities.plugin.zsh b/utilities/utilities.plugin.zsh
index 9b7f254..3a13aaf 100644
--- a/utilities/utilities.plugin.zsh
+++ b/utilities/utilities.plugin.zsh
@@ -102,3 +102,7 @@ if which docker-machine &> /dev/null; then
     fi
   }
 fi
+
+ls-iommu() {
+  $HOME/.config/zsh/ls-iommu.sh | sort -n
+}