diff --git a/src/cpp/README.md b/src/cpp/README.md
index 28063ec9705..5c1c40acf7f 100755
--- a/src/cpp/README.md
+++ b/src/cpp/README.md
@@ -11,21 +11,36 @@ Therefore, gRPC supports several major build systems, which should satisfy most
 
 ## Supported Platforms
 
-* Supported: These platforms are officially supported. We test our code on these
-platform and have automated continuous integration tests for them.
+* Officially Supported: These platforms are officially supported. We test our
+  code on these platform and have automated continuous integration tests for
+  them.
 
-* Best Effort: We do not have continous integration tests for these, but we are fairly confident that gRPC C++ would work on them.
-We will make our best effort to support them, and we welcome patches for such platforms, but we might need to declare bankruptcy on some issues.
+* Best Effort: We do not have continous integration tests for these, but we are
+  fairly confident that gRPC C++ would work on them. We will make our best
+  effort to support them, and we welcome patches for such platforms, but we
+  might need to declare bankruptcy on some issues.
+
+* Community Supported: These platforms are supported by contributions from the
+  open source community, there is no official support for them. Breakages on
+  these platforms may go unnoticed, and the community is responsible for all
+  maintenance. Unmaintained code for these platforms may be deleted.
 
 | Operating System | Architectures | Versions | Support Level |
 |------------------|---------------|----------|---------------|
-| Linux - Debian, Ubuntu, CentOS | x86, x64      | clang 4+, GCC 4.9+   | Supported |
-| Windows 10+                    | x86, x64      | Visual Studio 2015+    | Supported |
-| MacOS                          | x86, x64      | XCode 7.2+             | Supported |
-| Linux - Others                 | x86, x64      | clang 4+, GCC 4.9+   | Best Effort |
-| Linux                          | ARM           |                        | Best Effort |
-| iOS                            |               |                        | Best Effort |
-| Android                        |               |                        | Best Effort |
+| Linux - Debian, Ubuntu, CentOS | x86, x64      | clang 4+, GCC 4.9+     | Officially Supported |
+| Windows 10+                    | x86, x64      | Visual Studio 2015+    | Officially Supported |
+| MacOS                          | x86, x64      | XCode 7.2+             | Officially Supported |
+| Linux - Others                 | x86, x64      | clang 4+, GCC 4.9+     | Best Effort          |
+| Linux                          | ARM           |                        | Best Effort          |
+| iOS                            |               |                        | Best Effort          |
+| Android                        |               |                        | Best Effort          |
+| Asylo                          |               |                        | Best Effort          |
+| FreeBSD                        |               |                        | Community Supported  |
+| OpenBSD                        |               |                        | Community Supported  |
+| AIX                            |               |                        | Community Supported  |
+| Solaris                        |               |                        | Community Supported  |
+| NaCL                           |               |                        | Community Supported  |
+| Fuchsia                        |               |                        | Community Supported  |
 
 ## Bazel