diff --git a/README.md b/README.md
index 6752ab8..1e72f38 100644
--- a/README.md
+++ b/README.md
@@ -18,3 +18,112 @@ by symlinking CMakeLists.txt. It also symlinks settings.cmake, and so retains
 the notion of "apps," which enables the build system to switch which assembly
 it builds using the CAMKES\_APP CMake cache value. KataOS just has one app,
 *system*.
+
+## Sparrow Rust crates (what's included here).
+
+[More software will be published as we deem it ready for sharing until eventually
+all of Sparrow (software and hardware designs) will be available.]
+
+Many KataOS Rust crates are in the *apps/system/components* directory.
+Common/shared code is in *kata-os-common*:
+
+- *allocator*: a heap allocator built on the linked-list-allocator crate
+- *camkes*: support for writing CAmkES components in Rust
+- *capdl*: support for reading the capDL specification generated by capDL-tool
+- *copyregion*: a helper for temporarily mapping physical pages into a thread's VSpace
+- *cspace-slot*: an RAII helper for the *slot-allocator*
+- *logger*: seL4 integration with the Rust logger crate
+- *model*: support for processing capDL; used by the kata-os-rootserver
+- *panic*: an seL4-specific panic handler
+- *sel4-config*: build glue for seL4 kernel configuration
+- *sel4-sys*: seL4 system interfaces & glue
+- *slot-allocator*: an allocator for slots in the top-level CNode
+
+### Depending on Rust crates
+
+To use crates from Sparrow you can reference them from a local repository or
+directly from GitHub using git; e.g. in a Config.toml:
+```
+kata-os-common = { path = "../system/components/kata-os-common" }
+kata-os-common = { git = "https://github.com/google/AmbiML/sparrow/kata" }
+```
+NB: the git usage depends on cargo's support for searching for a crate
+named "kata-os-common" in the kata repo.
+When using a git dependency a git tag can be used to lock the crate version.
+
+Note that many Sparrow crates need the seL4 kernel configuration
+(e.g. to know whether MCS is configured). This is handled by the
+kata-os-common/sel4-config crate that is used by a build.rs to import
+kernel configuration parameters as Cargo features. In a Cargo.toml create
+a features manifest with the kernel parameters you need e.g.
+
+```
+[features]
+default = []
+# Used by sel4-config to extract kernel config
+CONFIG_PRINTING = []
+```
+
+then specify build-dependencies:
+
+```
+[build-dependencies]
+# build.rs depends on SEL4_OUT_DIR = "${ROOTDIR}/out/kata/kernel"
+sel4-config = { path = "../../kata/apps/system/components/kata-os-common/src/sel4-config" }
+```
+
+and use a build.rs that includes at least:
+
+```
+extern crate sel4_config;
+use std::env;
+
+fn main() {
+    // If SEL4_OUT_DIR is not set we expect the kernel build at a fixed
+    // location relative to the ROOTDIR env variable.
+    println!("SEL4_OUT_DIR {:?}", env::var("SEL4_OUT_DIR"));
+    let sel4_out_dir = env::var("SEL4_OUT_DIR")
+        .unwrap_or_else(|_| format!("{}/out/kata/kernel", env::var("ROOTDIR").unwrap()));
+    println!("sel4_out_dir {}", sel4_out_dir);
+
+    // Dredge seL4 kernel config for settings we need as features to generate
+    // correct code: e.g. CONFIG_KERNEL_MCS enables MCS support which changes
+    // the system call numbering.
+    let features = sel4_config::get_sel4_features(&sel4_out_dir);
+    println!("features={:?}", features);
+    for feature in features {
+        println!("cargo:rustc-cfg=feature=\"{}\"", feature);
+    }
+}
+```
+
+Note how build.rs expects an SEL4_OUT_DIR environment variable that has the path to
+the top of the kernel build area. The build-sparrow.sh script sets this for you but, for
+example, if you choose to run ninja directly you will need it set in your environment.
+
+Similar to SEL4_OUT_DIR the kata-os-common/src/sel4-sys crate that has the seL4 system
+call wrappers for Rust programs requires an SEL4_DIR envronment variable that has the
+path to the top of the kernel sources. This also is set by build-sparrow.sh.
+
+## Source Code Headers
+
+Every file containing source code includes copyright and license
+information. For dependent / non-Google code these are inherited from
+the upstream repositories. If there are Google modifications you may find
+the Google Apache license found below.
+
+Apache header:
+
+    Copyright 2022 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.
diff --git a/apps/system/components/kata-os-common/Cargo.toml b/apps/system/components/kata-os-common/Cargo.toml
index b4d6ca6..790cddc 100644
--- a/apps/system/components/kata-os-common/Cargo.toml
+++ b/apps/system/components/kata-os-common/Cargo.toml
@@ -1,3 +1,17 @@
+# Copyright 2022 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.
+
 [package]
 name = "kata-os-common"
 version = "0.1.0"
diff --git a/apps/system/components/kata-os-common/src/allocator/src/lib.rs b/apps/system/components/kata-os-common/src/allocator/src/lib.rs
index 359f76e..9660a04 100644
--- a/apps/system/components/kata-os-common/src/allocator/src/lib.rs
+++ b/apps/system/components/kata-os-common/src/allocator/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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.
+
 //! An allocator for Kata OS (derived from CortexM).
 
 #![no_std]
diff --git a/apps/system/components/kata-os-common/src/camkes/build.rs b/apps/system/components/kata-os-common/src/camkes/build.rs
index d637d08..69753b1 100644
--- a/apps/system/components/kata-os-common/src/camkes/build.rs
+++ b/apps/system/components/kata-os-common/src/camkes/build.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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 crate sel4_config;
 use std::env;
 
diff --git a/apps/system/components/kata-os-common/src/camkes/src/lib.rs b/apps/system/components/kata-os-common/src/camkes/src/lib.rs
index 854c78e..59d11f1 100644
--- a/apps/system/components/kata-os-common/src/camkes/src/lib.rs
+++ b/apps/system/components/kata-os-common/src/camkes/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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.
+
 //! Kata OS CAmkES component helpers
 
 #![no_std]
diff --git a/apps/system/components/kata-os-common/src/capdl/build.rs b/apps/system/components/kata-os-common/src/capdl/build.rs
index d637d08..69753b1 100644
--- a/apps/system/components/kata-os-common/src/capdl/build.rs
+++ b/apps/system/components/kata-os-common/src/capdl/build.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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 crate sel4_config;
 use std::env;
 
diff --git a/apps/system/components/kata-os-common/src/capdl/mod.rs b/apps/system/components/kata-os-common/src/capdl/mod.rs
index 918e9e4..7543d88 100644
--- a/apps/system/components/kata-os-common/src/capdl/mod.rs
+++ b/apps/system/components/kata-os-common/src/capdl/mod.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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.
+
 // capDL specification support.
 //
 // This code started from a bindgen conversion of capdl.h; some vestiges
diff --git a/apps/system/components/kata-os-common/src/copyregion/src/lib.rs b/apps/system/components/kata-os-common/src/copyregion/src/lib.rs
index 50b8c75..607b799 100644
--- a/apps/system/components/kata-os-common/src/copyregion/src/lib.rs
+++ b/apps/system/components/kata-os-common/src/copyregion/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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.
+
 //! RAII wrapper for using a KataOS copyregion object.
 
 #![no_std]
diff --git a/apps/system/components/kata-os-common/src/cspace-slot/src/lib.rs b/apps/system/components/kata-os-common/src/cspace-slot/src/lib.rs
index 723e0e1..eeb895e 100644
--- a/apps/system/components/kata-os-common/src/cspace-slot/src/lib.rs
+++ b/apps/system/components/kata-os-common/src/cspace-slot/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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.
+
 //! RAII wrapper for a dynamically allocated CSpace slot.
 
 #![cfg_attr(not(test), no_std)]
diff --git a/apps/system/components/kata-os-common/src/lib.rs b/apps/system/components/kata-os-common/src/lib.rs
index 0379efe..3bd21ba 100644
--- a/apps/system/components/kata-os-common/src/lib.rs
+++ b/apps/system/components/kata-os-common/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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.
+
 #![no_std]
 
 pub extern crate allocator;
diff --git a/apps/system/components/kata-os-common/src/logger/src/lib.rs b/apps/system/components/kata-os-common/src/logger/src/lib.rs
index ea9351f..2f6defc 100644
--- a/apps/system/components/kata-os-common/src/logger/src/lib.rs
+++ b/apps/system/components/kata-os-common/src/logger/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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.
+
 #![cfg_attr(not(test), no_std)]
 
 use core2::io::{Cursor, Write};
diff --git a/apps/system/components/kata-os-common/src/model/arch/aarch32.rs b/apps/system/components/kata-os-common/src/model/arch/aarch32.rs
index d7aecd8..7e7e4b1 100644
--- a/apps/system/components/kata-os-common/src/model/arch/aarch32.rs
+++ b/apps/system/components/kata-os-common/src/model/arch/aarch32.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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.
+
 // ARM aarch32 target support.
 
 #![allow(non_camel_case_types)]
diff --git a/apps/system/components/kata-os-common/src/model/arch/aarch64.rs b/apps/system/components/kata-os-common/src/model/arch/aarch64.rs
index 4ee75b2..761aebf 100644
--- a/apps/system/components/kata-os-common/src/model/arch/aarch64.rs
+++ b/apps/system/components/kata-os-common/src/model/arch/aarch64.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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.
+
 // ARM aarch64 target support.
 
 #![allow(non_camel_case_types)]
diff --git a/apps/system/components/kata-os-common/src/model/arch/arm.rs b/apps/system/components/kata-os-common/src/model/arch/arm.rs
index e2800b3..aab1c37 100644
--- a/apps/system/components/kata-os-common/src/model/arch/arm.rs
+++ b/apps/system/components/kata-os-common/src/model/arch/arm.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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.
+
 // ARM common target support.
 
 #![allow(non_camel_case_types)]
diff --git a/apps/system/components/kata-os-common/src/model/arch/riscv.rs b/apps/system/components/kata-os-common/src/model/arch/riscv.rs
index 869f2a5..1733214 100644
--- a/apps/system/components/kata-os-common/src/model/arch/riscv.rs
+++ b/apps/system/components/kata-os-common/src/model/arch/riscv.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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.
+
 // RISC-V common target support.
 
 #![allow(non_camel_case_types)]
diff --git a/apps/system/components/kata-os-common/src/model/arch/riscv32.rs b/apps/system/components/kata-os-common/src/model/arch/riscv32.rs
index 47c93b3..708301f 100644
--- a/apps/system/components/kata-os-common/src/model/arch/riscv32.rs
+++ b/apps/system/components/kata-os-common/src/model/arch/riscv32.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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.
+
 // RISC-V 32-bit target support.
 
 #![allow(non_camel_case_types)]
diff --git a/apps/system/components/kata-os-common/src/model/arch/riscv64.rs b/apps/system/components/kata-os-common/src/model/arch/riscv64.rs
index f480c1f..e396d55 100644
--- a/apps/system/components/kata-os-common/src/model/arch/riscv64.rs
+++ b/apps/system/components/kata-os-common/src/model/arch/riscv64.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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.
+
 // RISC-V 64-bit target support.
 
 #![allow(non_camel_case_types)]
diff --git a/apps/system/components/kata-os-common/src/model/arch/x86.rs b/apps/system/components/kata-os-common/src/model/arch/x86.rs
index f5faea3..03c70c1 100644
--- a/apps/system/components/kata-os-common/src/model/arch/x86.rs
+++ b/apps/system/components/kata-os-common/src/model/arch/x86.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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.
+
 // Intel x86 32-bit target support.
 
 use static_assertions::assert_cfg;
diff --git a/apps/system/components/kata-os-common/src/model/arch/x86_64.rs b/apps/system/components/kata-os-common/src/model/arch/x86_64.rs
index 0e1f566..769ceda 100644
--- a/apps/system/components/kata-os-common/src/model/arch/x86_64.rs
+++ b/apps/system/components/kata-os-common/src/model/arch/x86_64.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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.
+
 // Intel x86 64-bit target support.
 
 use static_assertions::assert_cfg;
diff --git a/apps/system/components/kata-os-common/src/model/build.rs b/apps/system/components/kata-os-common/src/model/build.rs
index 3b22c8d..b4220f7 100644
--- a/apps/system/components/kata-os-common/src/model/build.rs
+++ b/apps/system/components/kata-os-common/src/model/build.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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 crate sel4_config;
 use std::env;
 use std::fs;
diff --git a/apps/system/components/kata-os-common/src/model/feature/dynamic_alloc.rs b/apps/system/components/kata-os-common/src/model/feature/dynamic_alloc.rs
index c7f292c..b2f8929 100644
--- a/apps/system/components/kata-os-common/src/model/feature/dynamic_alloc.rs
+++ b/apps/system/components/kata-os-common/src/model/feature/dynamic_alloc.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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.
+
 // Dynamic Object Allocation.
 
 use crate::KataOsModel;
diff --git a/apps/system/components/kata-os-common/src/model/feature/mcs.rs b/apps/system/components/kata-os-common/src/model/feature/mcs.rs
index b97d28e..c5f029f 100644
--- a/apps/system/components/kata-os-common/src/model/feature/mcs.rs
+++ b/apps/system/components/kata-os-common/src/model/feature/mcs.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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.
+
 // MCS Kernel Support.
 
 use crate::KataOsModel;
diff --git a/apps/system/components/kata-os-common/src/model/feature/no_mcs.rs b/apps/system/components/kata-os-common/src/model/feature/no_mcs.rs
index 4f825e3..ee277fb 100644
--- a/apps/system/components/kata-os-common/src/model/feature/no_mcs.rs
+++ b/apps/system/components/kata-os-common/src/model/feature/no_mcs.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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.
+
 // No MCS Kernel Support.
 
 use crate::KataOsModel;
diff --git a/apps/system/components/kata-os-common/src/model/feature/no_smp.rs b/apps/system/components/kata-os-common/src/model/feature/no_smp.rs
index 727f229..047be58 100644
--- a/apps/system/components/kata-os-common/src/model/feature/no_smp.rs
+++ b/apps/system/components/kata-os-common/src/model/feature/no_smp.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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.
+
 // No SMP support.
 // TODO(sleffler): maybe merge into arch code
 
diff --git a/apps/system/components/kata-os-common/src/model/feature/no_spill_tcb_args.rs b/apps/system/components/kata-os-common/src/model/feature/no_spill_tcb_args.rs
index 85f7b0b..a887ede 100644
--- a/apps/system/components/kata-os-common/src/model/feature/no_spill_tcb_args.rs
+++ b/apps/system/components/kata-os-common/src/model/feature/no_spill_tcb_args.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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.
+
 // Register Calling Convention.
 // Max 4 arguments are passed to threads using registers.
 
diff --git a/apps/system/components/kata-os-common/src/model/feature/no_vcpu.rs b/apps/system/components/kata-os-common/src/model/feature/no_vcpu.rs
index 457e946..bba423d 100644
--- a/apps/system/components/kata-os-common/src/model/feature/no_vcpu.rs
+++ b/apps/system/components/kata-os-common/src/model/feature/no_vcpu.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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.
+
 // No Hypervisor Support.
 
 use crate::KataOsModel;
diff --git a/apps/system/components/kata-os-common/src/model/feature/smp.rs b/apps/system/components/kata-os-common/src/model/feature/smp.rs
index 3b69bb3..8d36c94 100644
--- a/apps/system/components/kata-os-common/src/model/feature/smp.rs
+++ b/apps/system/components/kata-os-common/src/model/feature/smp.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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.
+
 // SMP support.
 // TODO(sleffler): maybe merge into arch code
 
diff --git a/apps/system/components/kata-os-common/src/model/feature/spill_tcb_args.rs b/apps/system/components/kata-os-common/src/model/feature/spill_tcb_args.rs
index 1c8330e..58eebac 100644
--- a/apps/system/components/kata-os-common/src/model/feature/spill_tcb_args.rs
+++ b/apps/system/components/kata-os-common/src/model/feature/spill_tcb_args.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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.
+
 // Spill-to-stack Calling Convention.
 // The first REG_ARGS arguments are passed to threads using registers;
 // any more arguments are written to the stack.
diff --git a/apps/system/components/kata-os-common/src/model/feature/static_alloc.rs b/apps/system/components/kata-os-common/src/model/feature/static_alloc.rs
index 62f80a6..266d09f 100644
--- a/apps/system/components/kata-os-common/src/model/feature/static_alloc.rs
+++ b/apps/system/components/kata-os-common/src/model/feature/static_alloc.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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.
+
 // Static Object Allocation.
 // Expect a statically-allocated capDL spec.
 
diff --git a/apps/system/components/kata-os-common/src/model/feature/vcpu.rs b/apps/system/components/kata-os-common/src/model/feature/vcpu.rs
index 5e3165d..e96dfe2 100644
--- a/apps/system/components/kata-os-common/src/model/feature/vcpu.rs
+++ b/apps/system/components/kata-os-common/src/model/feature/vcpu.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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 Support.
 
 use crate::KataOsModel;
diff --git a/apps/system/components/kata-os-common/src/model/mod.rs b/apps/system/components/kata-os-common/src/model/mod.rs
index 65ce632..3b7386c 100644
--- a/apps/system/components/kata-os-common/src/model/mod.rs
+++ b/apps/system/components/kata-os-common/src/model/mod.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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.
+
 // capDL bootstrap for KataOs.
 //
 // Constructs a system of multiple components according to the capDL
diff --git a/apps/system/components/kata-os-common/src/panic/src/lib.rs b/apps/system/components/kata-os-common/src/panic/src/lib.rs
index b65a110..0beabbf 100644
--- a/apps/system/components/kata-os-common/src/panic/src/lib.rs
+++ b/apps/system/components/kata-os-common/src/panic/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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.
+
 #![no_std]
 
 #[cfg(not(test))]
diff --git a/apps/system/components/kata-os-common/src/scheduling/src/lib.rs b/apps/system/components/kata-os-common/src/scheduling/src/lib.rs
index d8a04f2..41e267c 100644
--- a/apps/system/components/kata-os-common/src/scheduling/src/lib.rs
+++ b/apps/system/components/kata-os-common/src/scheduling/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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.
+
 //! Kata OS seL4 scheduling primitives
 
 #![no_std]
diff --git a/apps/system/components/kata-os-common/src/sel4-config/src/lib.rs b/apps/system/components/kata-os-common/src/sel4-config/src/lib.rs
index 8e8efc4..5c67485 100644
--- a/apps/system/components/kata-os-common/src/sel4-config/src/lib.rs
+++ b/apps/system/components/kata-os-common/src/sel4-config/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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.
+
 // Cargo/rust build glue to import seL4 kernel configuration. We
 // parse the gen_config.h file from a build area to find features
 // needed by a dependent crate (sel4-sys, kata-os-rootserver, etc).
diff --git a/apps/system/components/kata-os-common/src/sel4-sys/arch/arm_generic.rs b/apps/system/components/kata-os-common/src/sel4-sys/arch/arm_generic.rs
index dfe3659..aae379e 100644
--- a/apps/system/components/kata-os-common/src/sel4-sys/arch/arm_generic.rs
+++ b/apps/system/components/kata-os-common/src/sel4-sys/arch/arm_generic.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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.
+
 // Arch-independent aliases.
 pub type seL4_ASIDControl = seL4_ARM_ASIDControl;
 pub type seL4_ASIDPool = seL4_ARM_ASIDPool;
diff --git a/apps/system/components/kata-os-common/src/sel4-sys/arch/riscv_generic.rs b/apps/system/components/kata-os-common/src/sel4-sys/arch/riscv_generic.rs
index 84a40f2..3c5be40 100644
--- a/apps/system/components/kata-os-common/src/sel4-sys/arch/riscv_generic.rs
+++ b/apps/system/components/kata-os-common/src/sel4-sys/arch/riscv_generic.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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.
+
 // Arch-independent aliases.
 pub type seL4_ASIDControl = seL4_RISCV_ASIDControl;
 pub type seL4_ASIDPool = seL4_RISCV_ASIDPool;
diff --git a/apps/system/components/kata-os-common/src/sel4-sys/arch/x86_64.rs b/apps/system/components/kata-os-common/src/sel4-sys/arch/x86_64.rs
index ba4dc8b..719d452 100644
--- a/apps/system/components/kata-os-common/src/sel4-sys/arch/x86_64.rs
+++ b/apps/system/components/kata-os-common/src/sel4-sys/arch/x86_64.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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.
+
 pub const seL4_WordBits: usize = 64;
 pub const seL4_PageBits: usize = 12;
 pub const seL4_SlotBits: usize = 5;
diff --git a/apps/system/components/kata-os-common/src/sel4-sys/arch/x86_generic.rs b/apps/system/components/kata-os-common/src/sel4-sys/arch/x86_generic.rs
index b3b43d7..666b0b0 100644
--- a/apps/system/components/kata-os-common/src/sel4-sys/arch/x86_generic.rs
+++ b/apps/system/components/kata-os-common/src/sel4-sys/arch/x86_generic.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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.
+
 // Arch-independent aliases.
 pub type seL4_ASIDControl = seL4_X86_ASIDControl;
 pub type seL4_ASIDPool = seL4_X86_ASIDPool;
diff --git a/apps/system/components/kata-os-common/src/sel4-sys/debug.rs b/apps/system/components/kata-os-common/src/sel4-sys/debug.rs
index ff6fbd6..7a672c6 100644
--- a/apps/system/components/kata-os-common/src/sel4-sys/debug.rs
+++ b/apps/system/components/kata-os-common/src/sel4-sys/debug.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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.
+
 #![allow(dead_code)]
 
 // Support for debugging capability handling. These only do something
diff --git a/apps/system/components/kata-os-common/src/slot-allocator/src/lib.rs b/apps/system/components/kata-os-common/src/slot-allocator/src/lib.rs
index ba528c4..72a41a6 100644
--- a/apps/system/components/kata-os-common/src/slot-allocator/src/lib.rs
+++ b/apps/system/components/kata-os-common/src/slot-allocator/src/lib.rs
@@ -1,3 +1,17 @@
+// Copyright 2022 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.
+
 //! An allocator for an array of integer-numbered objects. This is
 //! typically used to track capability slots in a CNode, though it
 //! can be used for other purposes.