diff --git a/Android.bp b/Android.bp
index 72b8721..fa043b2 100644
--- a/Android.bp
+++ b/Android.bp
@@ -34,6 +34,24 @@
     ],
 }
 
+aidl_interface_defaults {
+    name: "audio-aidl-defaults",
+    unstable: true,
+    host_supported: true,
+    backend: {
+        cpp: {
+            enabled: true,
+        },
+        java: {
+            enabled: true,
+        },
+        rust: {
+            enabled: true,
+        },
+    },
+
+}
+
 aidl_interface {
     name: "av-types-aidl",
     unstable: true,
@@ -71,6 +89,18 @@
     },
 }
 
+aidl_interface {
+    name: "audio-permission-aidl",
+    // TODO remove
+    vendor_available: true,
+    double_loadable: true,
+    defaults: ["audio-aidl-defaults"],
+    local_include_dir: "aidl",
+    srcs: [
+        "aidl/com/android/media/permission/*",
+    ],
+}
+
 cc_library_headers {
     name: "av-headers",
     export_include_dirs: ["include"],
diff --git a/aidl/com/android/media/permission/INativePermissionController.aidl b/aidl/com/android/media/permission/INativePermissionController.aidl
new file mode 100644
index 0000000..5766e33
--- /dev/null
+++ b/aidl/com/android/media/permission/INativePermissionController.aidl
@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.media.permission;
+
+import com.android.media.permission.UidPackageState;
+
+/**
+ * This interface is used by system_server to communicate permission information
+ * downwards towards native services.
+ * {@hide}
+ */
+interface INativePermissionController {
+    /**
+     * Initialize app-ids and their corresponding packages, to be used for package validation.
+     */
+    void populatePackagesForUids(in List<UidPackageState> initialPackageStates);
+    /**
+     * Replace or populate the list of packages associated with a given uid.
+     * If the list is empty, the package no longer exists.
+     */
+    void updatePackagesForUid(in UidPackageState newPackageState);
+}
diff --git a/aidl/com/android/media/permission/UidPackageState.aidl b/aidl/com/android/media/permission/UidPackageState.aidl
new file mode 100644
index 0000000..41b8c65
--- /dev/null
+++ b/aidl/com/android/media/permission/UidPackageState.aidl
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.media.permission;
+
+/**
+ * Entity representing the package names associated with a particular uid/app-id
+ * {@hide}
+ */
+parcelable UidPackageState {
+    int uid;
+    @utf8InCpp List<String> packageNames;
+}