diff --git a/src/arch/aarch64/cpu_entry.S b/src/arch/aarch64/cpu_entry.S
index 2c1047d..ce8d93b 100644
--- a/src/arch/aarch64/cpu_entry.S
+++ b/src/arch/aarch64/cpu_entry.S
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2018 Google LLC
+ *
+ * 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
+ *
+ *     https://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.
+ */
+
 #include "offsets.h"
 
 .section .text.cpu_entry, "ax"
diff --git a/src/arch/aarch64/entry.S b/src/arch/aarch64/entry.S
index ac705b0..0b4010c 100644
--- a/src/arch/aarch64/entry.S
+++ b/src/arch/aarch64/entry.S
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2018 Google LLC
+ *
+ * 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
+ *
+ *     https://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.
+ */
+
 /**
  * This is a generic entry point for an image. It carries out the operations
  * required to prepare the loaded image to be run. Specifically, it performs
diff --git a/src/arch/aarch64/exceptions.S b/src/arch/aarch64/exceptions.S
index de349a1..a6de2ce 100644
--- a/src/arch/aarch64/exceptions.S
+++ b/src/arch/aarch64/exceptions.S
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2018 Google LLC
+ *
+ * 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
+ *
+ *     https://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.
+ */
+
 #include "offsets.h"
 
 .section .text.vector_table_el2, "ax"
diff --git a/src/arch/aarch64/hypervisor_entry.S b/src/arch/aarch64/hypervisor_entry.S
index 9b7d095..39061d8 100644
--- a/src/arch/aarch64/hypervisor_entry.S
+++ b/src/arch/aarch64/hypervisor_entry.S
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2018 Google LLC
+ *
+ * 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
+ *
+ *     https://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.
+ */
+
 .section .init.image_entry, "ax"
 .global image_entry
 image_entry:
@@ -11,4 +27,3 @@
 	add x0, x0, :lo12:cpus
 
 	b cpu_entry
-
diff --git a/src/arch/aarch64/smc.S b/src/arch/aarch64/smc.S
index ceec68b..8170bc3 100644
--- a/src/arch/aarch64/smc.S
+++ b/src/arch/aarch64/smc.S
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2018 Google LLC
+ *
+ * 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
+ *
+ *     https://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.
+ */
+
 .section .text.smc, "ax"
 .globl smc
 smc:
diff --git a/src/arch/aarch64/vm/hf_call.S b/src/arch/aarch64/vm/hf_call.S
index 538bc27..1f6f033 100644
--- a/src/arch/aarch64/vm/hf_call.S
+++ b/src/arch/aarch64/vm/hf_call.S
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2018 Google LLC
+ *
+ * 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
+ *
+ *     https://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.
+ */
+
 .section .text.hf_call, "ax"
 .global hf_call
 hf_call:
diff --git a/src/arch/aarch64/vm/vm_entry.S b/src/arch/aarch64/vm/vm_entry.S
index 0e6a29e..d7542e3 100644
--- a/src/arch/aarch64/vm/vm_entry.S
+++ b/src/arch/aarch64/vm/vm_entry.S
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2018 Google LLC
+ *
+ * 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
+ *
+ *     https://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.
+ */
+
 .section .init.image_entry, "ax"
 .global image_entry
 image_entry: