From 08b8bc24cb818d78971f6cb941b7991e54c6971b Mon Sep 17 00:00:00 2001
From: Graham Christensen <graham@grahamc.com>
Date: Fri, 14 Apr 2017 17:59:54 -0400
Subject: [PATCH] Netboot: Add aarch64

---
 nixos/modules/installer/netboot/netboot.nix | 19 +++++---
 nixos/release.nix                           | 49 ++++++++++++++-------
 2 files changed, 44 insertions(+), 24 deletions(-)

diff --git a/nixos/modules/installer/netboot/netboot.nix b/nixos/modules/installer/netboot/netboot.nix
index 0f6046339b37..52239b619126 100644
--- a/nixos/modules/installer/netboot/netboot.nix
+++ b/nixos/modules/installer/netboot/netboot.nix
@@ -18,17 +18,17 @@ with lib;
 
   };
 
-  config = {
-
-    boot.loader.grub.version = 2;
-
+  config = rec {
     # Don't build the GRUB menu builder script, since we don't need it
     # here and it causes a cyclic dependency.
     boot.loader.grub.enable = false;
 
     # !!! Hack - attributes expected by other modules.
-    system.boot.loader.kernelFile = "bzImage";
-    environment.systemPackages = [ pkgs.grub2 pkgs.grub2_efi pkgs.syslinux ];
+    environment.systemPackages = [ pkgs.grub2_efi ]
+      ++ (if pkgs.stdenv.system == "aarch64-linux"
+          then []
+          else [ pkgs.grub2 pkgs.syslinux ]);
+    system.boot.loader.kernelFile = pkgs.stdenv.platform.kernelTarget;
 
     fileSystems."/" =
       { fsType = "tmpfs";
@@ -84,7 +84,12 @@ with lib;
         ];
     };
 
-    system.build.netbootIpxeScript = pkgs.writeTextDir "netboot.ipxe" "#!ipxe\nkernel bzImage init=${config.system.build.toplevel}/init ${toString config.boot.kernelParams}\ninitrd initrd\nboot";
+    system.build.netbootIpxeScript = pkgs.writeTextDir "netboot.ipxe" ''
+      #!ipxe
+      kernel ${pkgs.stdenv.platform.kernelTarget} init=${config.system.build.toplevel}/init ${toString config.boot.kernelParams}
+      initrd initrd
+      boot
+    '';
 
     boot.loader.timeout = 10;
 
diff --git a/nixos/release.nix b/nixos/release.nix
index 84e39cd91dc4..426a5eef34ae 100644
--- a/nixos/release.nix
+++ b/nixos/release.nix
@@ -1,6 +1,6 @@
 { nixpkgs ? { outPath = ./..; revCount = 56789; shortRev = "gfedcba"; }
 , stableBranch ? false
-, supportedSystems ? [ "x86_64-linux" ]
+, supportedSystems ? [ "x86_64-linux" "aarch64-linux" ]
 }:
 
 with import ../lib;
@@ -89,6 +89,27 @@ let
       });
   }).config));
 
+  makeNetboot = config:
+    let
+      config_evaled = import lib/eval-config.nix config;
+      build = config_evaled.config.system.build;
+      kernelTarget = config_evaled.pkgs.stdenv.platform.kernelTarget;
+    in
+      pkgs.symlinkJoin {
+        name="netboot";
+        paths=[
+          build.netbootRamdisk
+          build.kernel
+          build.netbootIpxeScript
+        ];
+        postBuild = ''
+          mkdir -p $out/nix-support
+          echo "file ${kernelTarget} $out/${kernelTarget}" >> $out/nix-support/hydra-build-products
+          echo "file initrd $out/initrd" >> $out/nix-support/hydra-build-products
+          echo "file ipxe $out/netboot.ipxe" >> $out/nix-support/hydra-build-products
+        '';
+      };
+
 
 in rec {
 
@@ -103,28 +124,22 @@ in rec {
   # Build the initial ramdisk so Hydra can keep track of its size over time.
   initialRamdisk = buildFromConfig ({ pkgs, ... }: { }) (config: config.system.build.initialRamdisk);
 
-  netboot.x86_64-linux = let build = (import lib/eval-config.nix {
+  netboot = {
+    x86_64-linux = makeNetboot {
       system = "x86_64-linux";
       modules = [
         ./modules/installer/netboot/netboot-minimal.nix
         versionModule
       ];
-    }).config.system.build;
-  in
-    pkgs.symlinkJoin {
-      name="netboot";
-      paths=[
-        build.netbootRamdisk
-        build.kernel
-        build.netbootIpxeScript
-      ];
-      postBuild = ''
-        mkdir -p $out/nix-support
-        echo "file bzImage $out/bzImage" >> $out/nix-support/hydra-build-products
-        echo "file initrd $out/initrd" >> $out/nix-support/hydra-build-products
-        echo "file ipxe $out/netboot.ipxe" >> $out/nix-support/hydra-build-products
-      '';
     };
+  } // (optionalAttrs (elem "aarch64-linux" supportedSystems) {
+    aarch64-linux = makeNetboot {
+      system = "aarch64-linux";
+      modules = [
+        ./modules/installer/netboot/netboot-minimal.nix
+        versionModule
+      ];
+    };});
 
   iso_minimal = forAllSystems (system: makeIso {
     module = ./modules/installer/cd-dvd/installation-cd-minimal.nix;