diff --git a/BUILD.gn b/BUILD.gn
index 83622bc..7962f70 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -1,3 +1,17 @@
+# 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.
+
 import("//build/image/image.gni")
 
 group("tests") {
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 0000000..9b6df60
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,26 @@
+# How to Contribute
+
+We'd love to accept your patches and contributions to this project. There are
+just a few small guidelines you need to follow.
+
+## Contributor License Agreement
+
+Contributions to this project must be accompanied by a Contributor License
+Agreement. You (or your employer) retain the copyright to your contribution;
+this simply gives us permission to use and redistribute your contributions as
+part of the project. Head over to <https://cla.developers.google.com/> to see
+your current agreements on file or to sign a new one.
+
+You generally only need to submit a CLA once, so if you've already submitted one
+(even if it was for a different project), you probably don't need to do it
+again.
+
+## Code reviews
+
+All submissions, including submissions by project members, require review. We
+use [Gerrit](https://hafnium-review.googlesource.com) for this purpose.
+
+## Community Guidelines
+
+This project follows [Google's Open Source Community
+Guidelines](https://opensource.google.com/conduct/).
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..d645695
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
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+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
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+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
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+      Work and such Derivative Works in Source or Object form.
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+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
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+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   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.
diff --git a/Makefile b/Makefile
index 467b068..36a66ea 100644
--- a/Makefile
+++ b/Makefile
@@ -64,3 +64,12 @@
 	@echo "Checking..."
 	@find src/ \( -name *.c -o -name *.cc \) -exec clang-check -p $(OUT_DIR) -analyze {} \;
 	@find test/ \( -name *.c -o -name *.cc \) -exec clang-check -p $(OUT_DIR) -analyze {} \;
+
+.PHONY: license
+license:
+	@find src/ -name *.c -o -name *.cc -o -name *.h | xargs -n1 python build/license.py --style c
+	@find inc/ -name *.c -o -name *.cc -o -name *.h | xargs -n1 python build/license.py --style c
+	@find test/ -name *.c -o -name *.cc -o -name *.h | xargs -n1 python build/license.py --style c
+	@find build/ -name *.py| xargs -n1 python build/license.py --style hash
+	@find test/ -name *.py| xargs -n1 python build/license.py --style hash
+	@find . \( -name *.gn -o -name *.gni \) | xargs -n1 python build/license.py --style hash
diff --git a/build/BUILD.gn b/build/BUILD.gn
index 52793dd..ecc413d 100644
--- a/build/BUILD.gn
+++ b/build/BUILD.gn
@@ -1,3 +1,17 @@
+# 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.
+
 import("//build/arch/common.gni")
 import("//build/arch/aarch64.gni")  # TODO: remove when no dependency on arch_aarch64_pl011_base_address
 
diff --git a/build/arch/aarch64.gni b/build/arch/aarch64.gni
index 54775e3..f9df8f2 100644
--- a/build/arch/aarch64.gni
+++ b/build/arch/aarch64.gni
@@ -1,3 +1,17 @@
+# 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.
+
 declare_args() {
   # Whether to include the PrimeCell UART (PL011) driver.
   arch_aarch64_use_pl011 = false
diff --git a/build/arch/common.gni b/build/arch/common.gni
index e4d3378..ca2e285 100644
--- a/build/arch/common.gni
+++ b/build/arch/common.gni
@@ -1,3 +1,17 @@
+# 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.
+
 declare_args() {
   # The specific CPU that runs the architecture.
   arch_cpu = ""
diff --git a/build/image/convert_to_binary.py b/build/image/convert_to_binary.py
index 2935ec8..aa6e79f 100644
--- a/build/image/convert_to_binary.py
+++ b/build/image/convert_to_binary.py
@@ -1,4 +1,20 @@
 #!/usr/bin/env python
+#
+# 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.
+
+#!/usr/bin/env python
 """Convert a file to binary format.
 
 Calls objcopy to convert a file into raw binary format.
diff --git a/build/image/extract_offsets.py b/build/image/extract_offsets.py
index c52d01b..e0a2b4a 100644
--- a/build/image/extract_offsets.py
+++ b/build/image/extract_offsets.py
@@ -1,4 +1,19 @@
 #!/usr/bin/env python
+#
+# 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.
+
 """Extract embedded offsets from an object file.
 
 We let the compiler calculate the offsets it is going to use and have those
diff --git a/build/image/generate_initrd.py b/build/image/generate_initrd.py
index 28e1680..5e89e63 100644
--- a/build/image/generate_initrd.py
+++ b/build/image/generate_initrd.py
@@ -1,4 +1,19 @@
 #!/usr/bin/env python
+#
+# 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.
+
 """Generate an initial RAM disk for the hypervisor.
 
 Packages the VMs, initrds for the VMs and the list of secondary VMs (vms.txt)
diff --git a/build/image/generate_offsets.gni b/build/image/generate_offsets.gni
index 74f3c1b..cce64bd 100644
--- a/build/image/generate_offsets.gni
+++ b/build/image/generate_offsets.gni
@@ -1,3 +1,17 @@
+# 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.
+
 # Calculates offsets of fields in C structures for use in assembly.
 template("generate_offsets") {
   # There are 3 targets involved:
diff --git a/build/image/image.gni b/build/image/image.gni
index 464bd30..b1b1895 100644
--- a/build/image/image.gni
+++ b/build/image/image.gni
@@ -1,3 +1,17 @@
+# 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.
+
 import("//build/arch/common.gni")
 
 # Build image, link to an ELF file then convert to plain binary.
diff --git a/build/license.py b/build/license.py
new file mode 100644
index 0000000..bce6f34
--- /dev/null
+++ b/build/license.py
@@ -0,0 +1,59 @@
+#!/usr/bin/env python
+#
+# 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.
+
+"""Add license header to source files.
+
+If the file doesn't have the license header, add it with the appropriate comment
+style.
+"""
+
+import argparse
+import sys
+
+
+apache2 = """{comment} Copyright 2018 Google LLC
+{comment}
+{comment} Licensed under the Apache License, Version 2.0 (the "License");
+{comment} you may not use this file except in compliance with the License.
+{comment} You may obtain a copy of the License at
+{comment}
+{comment}     https://www.apache.org/licenses/LICENSE-2.0
+{comment}
+{comment} Unless required by applicable law or agreed to in writing, software
+{comment} distributed under the License is distributed on an "AS IS" BASIS,
+{comment} WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+{comment} See the License for the specific language governing permissions and
+{comment} limitations under the License."""
+
+def Main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument("file")
+    parser.add_argument("--style", choices=["c", "hash"], required=True)
+    args = parser.parse_args()
+    header = "/*\n" if args.style == "c" else ""
+    header += apache2.format(comment=" *" if args.style == "c" else "#")
+    header += "\n */" if args.style == "c" else ""
+    header += "\n\n"
+    with open(args.file, "r") as f:
+        contents = f.read()
+        if header in contents:
+            return
+    with open(args.file, "w") as f:
+        f.write(header)
+        f.write(contents)
+
+if __name__ == "__main__":
+    sys.exit(Main())
diff --git a/build/toolchain/arch/BUILD.gn b/build/toolchain/arch/BUILD.gn
index 8bfb538..6ce6207 100644
--- a/build/toolchain/arch/BUILD.gn
+++ b/build/toolchain/arch/BUILD.gn
@@ -1,3 +1,17 @@
+# 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.
+
 # Target toolchain specific build arguments.
 declare_args() {
   # Build with a specific compiler version e.g. when building with clang, set
diff --git a/build/toolchain/host/BUILD.gn b/build/toolchain/host/BUILD.gn
index 7382097..ed1e510 100644
--- a/build/toolchain/host/BUILD.gn
+++ b/build/toolchain/host/BUILD.gn
@@ -1,3 +1,17 @@
+# 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.
+
 # Host toolchain specific build arguments.
 declare_args() {
   # Build with a specific compiler version e.g. when building with clang, set
diff --git a/inc/hf/addr.h b/inc/hf/addr.h
index 14e21c0..7121744 100644
--- a/inc/hf/addr.h
+++ b/inc/hf/addr.h
@@ -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.
+ */
+
 #pragma once
 
 #include <stddef.h>
diff --git a/inc/hf/alloc.h b/inc/hf/alloc.h
index ea90821..02dde59 100644
--- a/inc/hf/alloc.h
+++ b/inc/hf/alloc.h
@@ -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.
+ */
+
 #pragma once
 
 #include <stddef.h>
diff --git a/inc/hf/api.h b/inc/hf/api.h
index 35aba8d..de27c35 100644
--- a/inc/hf/api.h
+++ b/inc/hf/api.h
@@ -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.
+ */
+
 #pragma once
 
 #include "hf/cpu.h"
diff --git a/inc/hf/arch.h b/inc/hf/arch.h
index 860bbea..a07b180 100644
--- a/inc/hf/arch.h
+++ b/inc/hf/arch.h
@@ -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.
+ */
+
 #pragma once
 
 #include "hf/cpu.h"
diff --git a/inc/hf/boot_params.h b/inc/hf/boot_params.h
index 0a6ab8c..f7eb324 100644
--- a/inc/hf/boot_params.h
+++ b/inc/hf/boot_params.h
@@ -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.
+ */
+
 #pragma once
 
 #include <stdbool.h>
diff --git a/inc/hf/cpio.h b/inc/hf/cpio.h
index 55548c9..a04d0db 100644
--- a/inc/hf/cpio.h
+++ b/inc/hf/cpio.h
@@ -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.
+ */
+
 #pragma once
 
 #include <stdbool.h>
diff --git a/inc/hf/cpu.h b/inc/hf/cpu.h
index d598296..809c21e 100644
--- a/inc/hf/cpu.h
+++ b/inc/hf/cpu.h
@@ -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.
+ */
+
 #pragma once
 
 #include <stdbool.h>
diff --git a/inc/hf/decl_offsets.h b/inc/hf/decl_offsets.h
index 258d6c6..704c42b 100644
--- a/inc/hf/decl_offsets.h
+++ b/inc/hf/decl_offsets.h
@@ -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.
+ */
+
 #pragma once
 
 #ifdef GEN_OFFSETS
diff --git a/inc/hf/dlog.h b/inc/hf/dlog.h
index 0b07587..0e77d9b 100644
--- a/inc/hf/dlog.h
+++ b/inc/hf/dlog.h
@@ -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.
+ */
+
 #pragma once
 
 #include <stdarg.h>
diff --git a/inc/hf/fdt.h b/inc/hf/fdt.h
index bda1146..14e7736 100644
--- a/inc/hf/fdt.h
+++ b/inc/hf/fdt.h
@@ -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.
+ */
+
 #pragma once
 
 #include <stdbool.h>
diff --git a/inc/hf/fdt_handler.h b/inc/hf/fdt_handler.h
index d21c771..6d43d3f 100644
--- a/inc/hf/fdt_handler.h
+++ b/inc/hf/fdt_handler.h
@@ -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.
+ */
+
 #pragma once
 
 #include "hf/boot_params.h"
diff --git a/inc/hf/layout.h b/inc/hf/layout.h
index 9075d87..eb48e63 100644
--- a/inc/hf/layout.h
+++ b/inc/hf/layout.h
@@ -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.
+ */
+
 #pragma once
 
 #include "hf/addr.h"
diff --git a/inc/hf/load.h b/inc/hf/load.h
index d1f239c..794e752 100644
--- a/inc/hf/load.h
+++ b/inc/hf/load.h
@@ -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.
+ */
+
 #pragma once
 
 #include <stddef.h>
diff --git a/inc/hf/memiter.h b/inc/hf/memiter.h
index 9cb9576..2b86339 100644
--- a/inc/hf/memiter.h
+++ b/inc/hf/memiter.h
@@ -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.
+ */
+
 #pragma once
 
 #include <stdbool.h>
diff --git a/inc/hf/mm.h b/inc/hf/mm.h
index 2f52cb3..c322b96 100644
--- a/inc/hf/mm.h
+++ b/inc/hf/mm.h
@@ -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.
+ */
+
 #pragma once
 
 #include <stdbool.h>
diff --git a/inc/hf/spinlock.h b/inc/hf/spinlock.h
index 646136c..7a307f6 100644
--- a/inc/hf/spinlock.h
+++ b/inc/hf/spinlock.h
@@ -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.
+ */
+
 #pragma once
 
 #include <stdatomic.h>
diff --git a/inc/hf/std.h b/inc/hf/std.h
index e17f155..55922fa 100644
--- a/inc/hf/std.h
+++ b/inc/hf/std.h
@@ -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.
+ */
+
 #pragma once
 
 #include <stddef.h>
diff --git a/inc/hf/vm.h b/inc/hf/vm.h
index 64e4ee0..48e707b 100644
--- a/inc/hf/vm.h
+++ b/inc/hf/vm.h
@@ -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.
+ */
+
 #pragma once
 
 #include "hf/cpu.h"
diff --git a/inc/vmapi/hf/call.h b/inc/vmapi/hf/call.h
index 4f6e05b..4e70395 100644
--- a/inc/vmapi/hf/call.h
+++ b/inc/vmapi/hf/call.h
@@ -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.
+ */
+
 #pragma once
 
 #if defined(__linux__) && defined(__KERNEL__)
diff --git a/inc/vmapi/hf/types.h b/inc/vmapi/hf/types.h
new file mode 100644
index 0000000..1e4c7f8
--- /dev/null
+++ b/inc/vmapi/hf/types.h
@@ -0,0 +1,43 @@
+/*
+ * 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.
+ */
+
+#pragma once
+
+#if defined(__linux__) && defined(__KERNEL__)
+
+#include <linux/types.h>
+
+typedef phys_addr_t hf_ipaddr_t;
+
+#define PRIu16 "hu"
+
+#else
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
+typedef uintptr_t hf_ipaddr_t;
+
+#endif
+
+typedef uint16_t hf_vm_id_t;
+
+#define HF_VM_ID_MAX UINT16_MAX
+#define HF_PRI_VM_ID PRIu16
+
+/* The ID of the primary VM which is responsile for scheduling. */
+#define HF_PRIMARY_VM_ID 0
diff --git a/kokoro/ubuntu/build.sh b/kokoro/ubuntu/build.sh
index 45f5d51..472a14c 100755
--- a/kokoro/ubuntu/build.sh
+++ b/kokoro/ubuntu/build.sh
@@ -1,4 +1,18 @@
 #!/bin/bash
+#
+# 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.
 
 # Fail on any error.
 set -e
@@ -44,9 +58,10 @@
 
 make format
 make tidy
+make license
 
 if [[ `git status --porcelain` ]]
 then
-	echo "Run \`make format\' and \`make tidy\` locally to fix this."
+	echo "Run \`make format\', \`make tidy\` and \`make license\` locally to fix this."
 	exit 1
 fi
diff --git a/kokoro/ubuntu/test.sh b/kokoro/ubuntu/test.sh
index db3ad10..f835b39 100755
--- a/kokoro/ubuntu/test.sh
+++ b/kokoro/ubuntu/test.sh
@@ -1,4 +1,18 @@
 #!/bin/bash
+#
+# 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.
 
 # Note: this assumes that the images have all been built and the current working
 # directory is the root of the repo.
diff --git a/src/BUILD.gn b/src/BUILD.gn
index 55a6422..81519a3 100644
--- a/src/BUILD.gn
+++ b/src/BUILD.gn
@@ -1,3 +1,17 @@
+# 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.
+
 # Hypervisor specific code.
 source_set("src") {
   sources = [
diff --git a/src/alloc.c b/src/alloc.c
index 0e4f468..c34af0c 100644
--- a/src/alloc.c
+++ b/src/alloc.c
@@ -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 "hf/alloc.h"
 
 #include "hf/dlog.h"
diff --git a/src/api.c b/src/api.c
index cd90205..11df107 100644
--- a/src/api.c
+++ b/src/api.c
@@ -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 "hf/api.h"
 
 #include <assert.h>
diff --git a/src/arch/aarch64/BUILD.gn b/src/arch/aarch64/BUILD.gn
index 00f0553..520a97d 100644
--- a/src/arch/aarch64/BUILD.gn
+++ b/src/arch/aarch64/BUILD.gn
@@ -1,3 +1,17 @@
+# 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.
+
 import("//build/arch/aarch64.gni")
 import("//build/image/generate_offsets.gni")
 
diff --git a/src/arch/aarch64/handler.c b/src/arch/aarch64/handler.c
index 4bdbb04..53f8c88 100644
--- a/src/arch/aarch64/handler.c
+++ b/src/arch/aarch64/handler.c
@@ -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 "hf/api.h"
 #include "hf/cpu.h"
 #include "hf/dlog.h"
diff --git a/src/arch/aarch64/inc/hf/arch/addr.h b/src/arch/aarch64/inc/hf/arch/addr.h
index d8ba79d..a6c5f8b 100644
--- a/src/arch/aarch64/inc/hf/arch/addr.h
+++ b/src/arch/aarch64/inc/hf/arch/addr.h
@@ -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.
+ */
+
 #pragma once
 
 #include <stdint.h>
diff --git a/src/arch/aarch64/inc/hf/arch/barriers.h b/src/arch/aarch64/inc/hf/arch/barriers.h
index c52b034..7b855a6 100644
--- a/src/arch/aarch64/inc/hf/arch/barriers.h
+++ b/src/arch/aarch64/inc/hf/arch/barriers.h
@@ -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.
+ */
+
 #pragma once
 
 static inline void dmb(void)
diff --git a/src/arch/aarch64/inc/hf/arch/cpu.h b/src/arch/aarch64/inc/hf/arch/cpu.h
index b4d9614..d2c1a12 100644
--- a/src/arch/aarch64/inc/hf/arch/cpu.h
+++ b/src/arch/aarch64/inc/hf/arch/cpu.h
@@ -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.
+ */
+
 #pragma once
 
 #include <stdbool.h>
diff --git a/src/arch/aarch64/inc/hf/arch/mm.h b/src/arch/aarch64/inc/hf/arch/mm.h
index cc02cbd..3437b71 100644
--- a/src/arch/aarch64/inc/hf/arch/mm.h
+++ b/src/arch/aarch64/inc/hf/arch/mm.h
@@ -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.
+ */
+
 #pragma once
 
 #include <stdbool.h>
diff --git a/src/arch/aarch64/inc/hf/arch/vm/shutdown.h b/src/arch/aarch64/inc/hf/arch/vm/shutdown.h
index c2817e7..cc179c5 100644
--- a/src/arch/aarch64/inc/hf/arch/vm/shutdown.h
+++ b/src/arch/aarch64/inc/hf/arch/vm/shutdown.h
@@ -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.
+ */
+
 #pragma once
 
 #include <stdnoreturn.h>
diff --git a/src/arch/aarch64/io.h b/src/arch/aarch64/io.h
index 76f9581..1f1372e 100644
--- a/src/arch/aarch64/io.h
+++ b/src/arch/aarch64/io.h
@@ -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.
+ */
+
 #pragma once
 
 #include <stddef.h>
diff --git a/src/arch/aarch64/mm.c b/src/arch/aarch64/mm.c
index 0e1ca19..303814e 100644
--- a/src/arch/aarch64/mm.c
+++ b/src/arch/aarch64/mm.c
@@ -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 "hf/mm.h"
 
 #include "hf/arch/cpu.h"
diff --git a/src/arch/aarch64/msr.h b/src/arch/aarch64/msr.h
index 4df39dd..6702ca4 100644
--- a/src/arch/aarch64/msr.h
+++ b/src/arch/aarch64/msr.h
@@ -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.
+ */
+
 #pragma once
 
 #include <stddef.h>
diff --git a/src/arch/aarch64/offsets.c b/src/arch/aarch64/offsets.c
index 4c005df..2c2db4f 100644
--- a/src/arch/aarch64/offsets.c
+++ b/src/arch/aarch64/offsets.c
@@ -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.
+ */
+
 #ifndef GEN_OFFSETS
 #include "offsets.h"
 #endif /* GEN_OFFSETS */
diff --git a/src/arch/aarch64/params.c b/src/arch/aarch64/params.c
index d4d709c..ab1400f 100644
--- a/src/arch/aarch64/params.c
+++ b/src/arch/aarch64/params.c
@@ -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 "hf/boot_params.h"
 #include "hf/fdt_handler.h"
 
diff --git a/src/arch/aarch64/pl011.c b/src/arch/aarch64/pl011.c
index de86f9d..c9d936e 100644
--- a/src/arch/aarch64/pl011.c
+++ b/src/arch/aarch64/pl011.c
@@ -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 "hf/dlog.h"
 
 #include "io.h"
diff --git a/src/arch/aarch64/psci.h b/src/arch/aarch64/psci.h
index 14f513d..1ed21ce 100644
--- a/src/arch/aarch64/psci.h
+++ b/src/arch/aarch64/psci.h
@@ -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.
+ */
+
 #pragma once
 
 /* clang-format off */
diff --git a/src/arch/aarch64/vm/BUILD.gn b/src/arch/aarch64/vm/BUILD.gn
index aa5c7dc..8171764 100644
--- a/src/arch/aarch64/vm/BUILD.gn
+++ b/src/arch/aarch64/vm/BUILD.gn
@@ -1,3 +1,17 @@
+# 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.
+
 # These components are only used by VMs for aarch64 specific actions.
 
 # Implements image_entry for a simple VM kernel.
diff --git a/src/arch/aarch64/vm/shutdown.c b/src/arch/aarch64/vm/shutdown.c
index 6299880..4bc48cd 100644
--- a/src/arch/aarch64/vm/shutdown.c
+++ b/src/arch/aarch64/vm/shutdown.c
@@ -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 "hf/arch/vm/shutdown.h"
 
 #include "vmapi/hf/call.h"
diff --git a/src/arch/mock/BUILD.gn b/src/arch/mock/BUILD.gn
index 60c3428..356ad60 100644
--- a/src/arch/mock/BUILD.gn
+++ b/src/arch/mock/BUILD.gn
@@ -1,3 +1,17 @@
+# 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.
+
 # Mock implementation of putchar logs to the console.
 source_set("putchar") {
   sources = [
diff --git a/src/arch/mock/inc/hf/arch/addr.h b/src/arch/mock/inc/hf/arch/addr.h
index d8ba79d..a6c5f8b 100644
--- a/src/arch/mock/inc/hf/arch/addr.h
+++ b/src/arch/mock/inc/hf/arch/addr.h
@@ -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.
+ */
+
 #pragma once
 
 #include <stdint.h>
diff --git a/src/arch/mock/inc/hf/arch/cpu.h b/src/arch/mock/inc/hf/arch/cpu.h
index 9fbd041..501c303 100644
--- a/src/arch/mock/inc/hf/arch/cpu.h
+++ b/src/arch/mock/inc/hf/arch/cpu.h
@@ -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.
+ */
+
 #pragma once
 
 #include <stdint.h>
diff --git a/src/arch/mock/inc/hf/arch/mm.h b/src/arch/mock/inc/hf/arch/mm.h
index 3c016d0..96f7014 100644
--- a/src/arch/mock/inc/hf/arch/mm.h
+++ b/src/arch/mock/inc/hf/arch/mm.h
@@ -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.
+ */
+
 #pragma once
 
 #include <stdbool.h>
diff --git a/src/arch/mock/putchar.c b/src/arch/mock/putchar.c
index 3452b37..6f2a006 100644
--- a/src/arch/mock/putchar.c
+++ b/src/arch/mock/putchar.c
@@ -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 <stdio.h>
 
 #include "hf/dlog.h"
diff --git a/src/cpio.c b/src/cpio.c
index d613e54..01002d8 100644
--- a/src/cpio.c
+++ b/src/cpio.c
@@ -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 "hf/cpio.h"
 
 #include <stdint.h>
diff --git a/src/cpu.c b/src/cpu.c
index 2c09d81..03b92e1 100644
--- a/src/cpu.c
+++ b/src/cpu.c
@@ -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 "hf/cpu.h"
 
 #include <stdalign.h>
diff --git a/src/dlog.c b/src/dlog.c
index 7128a7b..e9643c5 100644
--- a/src/dlog.c
+++ b/src/dlog.c
@@ -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 "hf/dlog.h"
 
 #include <stdbool.h>
diff --git a/src/fdt.c b/src/fdt.c
index d7d1aad..3f7804e 100644
--- a/src/fdt.c
+++ b/src/fdt.c
@@ -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 "hf/fdt.h"
 
 #include <stdint.h>
diff --git a/src/fdt_handler.c b/src/fdt_handler.c
index cb910ac..851facd 100644
--- a/src/fdt_handler.c
+++ b/src/fdt_handler.c
@@ -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 "hf/fdt_handler.h"
 
 #include "hf/boot_params.h"
diff --git a/src/fdt_handler_test.cc b/src/fdt_handler_test.cc
index ab0b349..c3fbb92 100644
--- a/src/fdt_handler_test.cc
+++ b/src/fdt_handler_test.cc
@@ -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.
+ */
+
 extern "C" {
 #include "hf/fdt_handler.h"
 
diff --git a/src/fdt_test.cc b/src/fdt_test.cc
index 6d55242..9d0e4a9 100644
--- a/src/fdt_test.cc
+++ b/src/fdt_test.cc
@@ -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.
+ */
+
 extern "C" {
 
 #include "hf/fdt.h"
diff --git a/src/load.c b/src/load.c
index 6732b28..eb6a9f9 100644
--- a/src/load.c
+++ b/src/load.c
@@ -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 "hf/load.h"
 
 #include <assert.h>
diff --git a/src/main.c b/src/main.c
index 6ae6607..df27ea2 100644
--- a/src/main.c
+++ b/src/main.c
@@ -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 <stdalign.h>
 #include <stddef.h>
 #include <stdnoreturn.h>
diff --git a/src/memiter.c b/src/memiter.c
index 57cf98b..ad98fac 100644
--- a/src/memiter.c
+++ b/src/memiter.c
@@ -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 "hf/memiter.h"
 
 #include "hf/std.h"
diff --git a/src/mm.c b/src/mm.c
index 896725c..fa8d52c 100644
--- a/src/mm.c
+++ b/src/mm.c
@@ -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 "hf/mm.h"
 
 #include <assert.h>
diff --git a/src/std.c b/src/std.c
index 6d26bef..036c563 100644
--- a/src/std.c
+++ b/src/std.c
@@ -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 "hf/std.h"
 
 void *memset(void *s, int c, size_t n)
diff --git a/src/vm.c b/src/vm.c
index b62238d..c840c2a 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -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 "hf/vm.h"
 
 #include "hf/api.h"
diff --git a/test/vm/BUILD.gn b/test/vm/BUILD.gn
index 743326d..f66a698 100644
--- a/test/vm/BUILD.gn
+++ b/test/vm/BUILD.gn
@@ -1,3 +1,17 @@
+# 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.
+
 import("//build/image/image.gni")
 
 # Primary VMs host the test framework.
diff --git a/test/vm/hftest.c b/test/vm/hftest.c
index 90b5cf0..6a66fed 100644
--- a/test/vm/hftest.c
+++ b/test/vm/hftest.c
@@ -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 "hftest.h"
 
 #include <stdalign.h>
diff --git a/test/vm/hftest.h b/test/vm/hftest.h
index 6e22a3e..0f10eca 100644
--- a/test/vm/hftest.h
+++ b/test/vm/hftest.h
@@ -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.
+ */
+
 #pragma once
 
 #include <stdbool.h>
diff --git a/test/vm/hftest.py b/test/vm/hftest.py
index bf32296..91e3bcc 100755
--- a/test/vm/hftest.py
+++ b/test/vm/hftest.py
@@ -1,4 +1,19 @@
 #!/usr/bin/env python
+#
+# 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.
+
 """Run tests.
 
 Runs tests on QEMU.
diff --git a/test/vm/primary_only.c b/test/vm/primary_only.c
index 4667783..166fb0c 100644
--- a/test/vm/primary_only.c
+++ b/test/vm/primary_only.c
@@ -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 "vmapi/hf/call.h"
 
 #include "hftest.h"
diff --git a/test/vm/primary_with_secondaries.c b/test/vm/primary_with_secondaries.c
index 9e9fce0..146b576 100644
--- a/test/vm/primary_with_secondaries.c
+++ b/test/vm/primary_with_secondaries.c
@@ -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 <assert.h>
 #include <stdalign.h>
 #include <stdint.h>
diff --git a/test/vm/secondaries/BUILD.gn b/test/vm/secondaries/BUILD.gn
index 85700da..cd0ad69 100644
--- a/test/vm/secondaries/BUILD.gn
+++ b/test/vm/secondaries/BUILD.gn
@@ -1,3 +1,17 @@
+# 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.
+
 import("//build/image/image.gni")
 
 vm_kernel("echo") {
diff --git a/test/vm/secondaries/echo.c b/test/vm/secondaries/echo.c
index 4bc3f83..7982757 100644
--- a/test/vm/secondaries/echo.c
+++ b/test/vm/secondaries/echo.c
@@ -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 <stdalign.h>
 #include <stdint.h>
 
diff --git a/test/vm/secondaries/relay_a.c b/test/vm/secondaries/relay_a.c
index e44267d..8fa7bb5 100644
--- a/test/vm/secondaries/relay_a.c
+++ b/test/vm/secondaries/relay_a.c
@@ -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 <stdalign.h>
 #include <stdint.h>
 
diff --git a/test/vm/secondaries/relay_b.c b/test/vm/secondaries/relay_b.c
index ce83ce2..ae74e6c 100644
--- a/test/vm/secondaries/relay_b.c
+++ b/test/vm/secondaries/relay_b.c
@@ -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 <stdalign.h>
 #include <stdint.h>
 
diff --git a/third_party/BUILD.gn b/third_party/BUILD.gn
index af59e92..8395319 100644
--- a/third_party/BUILD.gn
+++ b/third_party/BUILD.gn
@@ -1,3 +1,17 @@
+# 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.
+
 config("gtest_config") {
   visibility = [ ":gtest" ]