iommu: add a new library call for intel iommu

lib/qemu/iommu

@@ -0,0 +1,38 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: GPL-3.0-or-later
+# Copyright (c) 2025 Samsung Electronics Co., Ltd. All Rights Reserved.
+#
+# Written by Joel Granados <joel.granados@kernel.org>
+
+qemu_viommu_intel() {
+  local long="extra-args:"
+
+  if ! tmp=$(getopt -o "" --long "$long" -n "${FUNCNAME[0]}" -- "$@"); then
+    exit 1
+  fi
+
+  eval set -- "$tmp"
+  unset tmp
+
+  while true; do
+    case "$1" in
+      '--extra-args' )
+        local extra_args="$2"; shift 2
+        ;;
+      '--' )
+        shift; break
+        ;;
+      * )
+        _fatal 1 "unknown argument '$1'"
+        ;;
+    esac
+  done
+
+  local iommu_arg="intel-iommu,intremap=on"
+
+  if [[ -v extra_args ]]; then
+    iommu_arg="${iommu_arg},${extra_args}"
+  fi
+
+  QEMU_PARAMS+=("-device" "${iommu_arg}")
+}