Add "M1 GPU Driver" page

In my attempt to exercise Cunningham's Law, add a reference to the M1
GPU driver work.

Signed-off-by: Kees Cook <keescook@chromium.org>

SUMMARY.md

@@ -31,6 +31,7 @@
   - [Null Block Driver](Null-Block-Driver.md)
   - [Android Binder Driver](Android-Binder-Driver.md)
   - [PuzzleFS filesystem driver](PuzzleFS-filesystem-driver.md)
+  - [Apple M1 GPU Driver](M1-GPU-Driver.md)
 
 # Links
 

src/M1-GPU-Driver.md

@@ -0,0 +1,21 @@
+# M1 GPU Driver
+
+As part of the [Asahi Linux](https://asahilinux.org/about/) project, the Apple
+M1 GPU driver has been implemented in Rust for the Linux kernel, along with
+creating DRM bindings and associated userspace pieces.
+
+The driver lives [here](https://github.com/AsahiLinux/linux/tree/bits/210-gpu).
+The current development team is:
+
+  - [Alyssa Rosenzweig](https://social.treehouse.systems/@alyssa) is writing
+    the OpenGL driver and compiler.
+  - [Asahi Lina](https://vt.social/@lina) is writing the kernel driver and
+    helping with OpenGL.
+  - [Dougall Johnson](https://mastodon.social/@dougall) is reverse-engineering
+    the instruction set with Alyssa.
+  - [Ella Stanforth](https://tech.lgbt/@ella) is working on a Vulkan driver.
+
+# References
+
+  - [Apple GPU drivers now in Asahi Linux](https://asahilinux.org/2022/12/gpu-drivers-now-in-asahi-linux/)
+  - [Tales of the M1 GPU](https://asahilinux.org/2022/11/tales-of-the-m1-gpu/)