1 files changed, 29 insertions, 0 deletions
diff --git a/infra/libkookie/nixpkgs/pkgs/os-specific/linux/microcode/amd.nix b/infra/libkookie/nixpkgs/pkgs/os-specific/linux/microcode/amd.nix
new file mode 100644
index 000000000000..135187c9a108
--- /dev/null
+++ b/infra/libkookie/nixpkgs/pkgs/os-specific/linux/microcode/amd.nix
@@ -0,0 +1,29 @@
+{ stdenv, firmwareLinuxNonfree, libarchive }:
+
+stdenv.mkDerivation {
+  name = "amd-ucode-${firmwareLinuxNonfree.version}";
+
+  src = firmwareLinuxNonfree;
+
+  sourceRoot = ".";
+
+  buildInputs = [ libarchive ];
+
+  buildPhase = ''
+    mkdir -p kernel/x86/microcode
+    find ${firmwareLinuxNonfree}/lib/firmware/amd-ucode -name \*.bin \
+      -exec sh -c 'cat {} >> kernel/x86/microcode/AuthenticAMD.bin' \;
+  '';
+
+  installPhase = ''
+    mkdir -p $out
+    echo kernel/x86/microcode/AuthenticAMD.bin | bsdcpio -o -H newc -R 0:0 > $out/amd-ucode.img
+  '';
+
+  meta = with stdenv.lib; {
+    description = "AMD Processor microcode patch";
+    homepage = "https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git";
+    license = licenses.unfreeRedistributableFirmware;
+    platforms = platforms.linux;
+  };
+}