From 79f9ec1033309fde1dba5e5f2fa76448eb4847ee Mon Sep 17 00:00:00 2001
From: sanana <umutinanerdogan@pm.me>
Date: Mon, 2 Sep 2024 11:12:24 +0300
Subject: [PATCH 1/2] edk2: add loongarch64 support

Upstream had this for some time, let's just enable building it.
---
 pkgs/by-name/ed/edk2/package.nix | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pkgs/by-name/ed/edk2/package.nix b/pkgs/by-name/ed/edk2/package.nix
index b6946ea11949..0f50c45e6487 100644
--- a/pkgs/by-name/ed/edk2/package.nix
+++ b/pkgs/by-name/ed/edk2/package.nix
@@ -23,6 +23,8 @@ else if stdenv.isAarch64 then
   "AARCH64"
 else if stdenv.hostPlatform.isRiscV64 then
   "RISCV64"
+else if stdenv.hostPlatform.isLoongArch64 then
+  "LOONGARCH64"
 else
   throw "Unsupported architecture";
 
@@ -128,7 +130,7 @@ edk2 = stdenv.mkDerivation {
     homepage = "https://github.com/tianocore/tianocore.github.io/wiki/EDK-II/";
     changelog = "https://github.com/tianocore/edk2/releases/tag/edk2-stable${edk2.version}";
     license = lib.licenses.bsd2;
-    platforms = with lib.platforms; aarch64 ++ arm ++ i686 ++ x86_64 ++ riscv64;
+    platforms = with lib.platforms; aarch64 ++ arm ++ i686 ++ x86_64 ++ loongarch64 ++ riscv64;
     maintainers = [ lib.maintainers.mjoerg ];
   };
 

From 4074fbdc6c28e443295f7f6451ec4223b7fe8703 Mon Sep 17 00:00:00 2001
From: sanana <umutinanerdogan@pm.me>
Date: Mon, 2 Sep 2024 11:18:59 +0300
Subject: [PATCH 2/2] OVMF: build for loongarch64

Now that the edk2 package has support for loongarch64, this patch
enables building OVMF for loongarch64.
---
 pkgs/applications/virtualization/OVMF/default.nix | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/pkgs/applications/virtualization/OVMF/default.nix b/pkgs/applications/virtualization/OVMF/default.nix
index aba83449423b..2c1e49ac2c3d 100644
--- a/pkgs/applications/virtualization/OVMF/default.nix
+++ b/pkgs/applications/virtualization/OVMF/default.nix
@@ -29,6 +29,7 @@
     x86_64 = "OvmfPkg/OvmfPkgX64.dsc";
     aarch64 = "ArmVirtPkg/ArmVirtQemu.dsc";
     riscv64 = "OvmfPkg/RiscVVirt/RiscVVirtQemu.dsc";
+    loongarch64 = "OvmfPkg/LoongArchVirt/LoongArchVirtQemu.dsc";
   }.${stdenv.hostPlatform.parsed.cpu.name}
   or (throw "Unsupported OVMF `projectDscPath` on ${stdenv.hostPlatform.parsed.cpu.name}")
 , fwPrefix ? {
@@ -36,6 +37,7 @@
     x86_64 = "OVMF";
     aarch64 = "AAVMF";
     riscv64 = "RISCV_VIRT";
+    loongarch64 = "LOONGARCH_VIRT";
   }.${stdenv.hostPlatform.parsed.cpu.name}
   or (throw "Unsupported OVMF `fwPrefix` on ${stdenv.hostPlatform.parsed.cpu.name}")
 , metaPlatforms ? edk2.meta.platforms
@@ -130,17 +132,17 @@ edk2.mkDerivation projectDscPath (finalAttrs: {
     export PYTHONPATH=$NIX_BUILD_TOP/debian/python:$PYTHONPATH
   '';
 
-  postBuild = lib.optionalString stdenv.hostPlatform.isAarch ''
+  postBuild = lib.optionalString (stdenv.hostPlatform.isAarch || stdenv.hostPlatform.isLoongArch64) ''
     (
     cd ${buildPrefix}/FV
     cp QEMU_EFI.fd ${fwPrefix}_CODE.fd
     cp QEMU_VARS.fd ${fwPrefix}_VARS.fd
-
+    )
+  '' + lib.optionalString stdenv.hostPlatform.isAarch ''
     # QEMU expects 64MiB CODE and VARS files on ARM/AARCH64 architectures
     # Truncate the firmware files to the expected size
-    truncate -s 64M ${fwPrefix}_CODE.fd
-    truncate -s 64M ${fwPrefix}_VARS.fd
-    )
+    truncate -s 64M ${buildPrefix}/FV/${fwPrefix}_CODE.fd
+    truncate -s 64M ${buildPrefix}/FV/${fwPrefix}_VARS.fd
   '' + lib.optionalString stdenv.hostPlatform.isRiscV ''
     truncate -s 32M ${buildPrefix}/FV/${fwPrefix}_CODE.fd
     truncate -s 32M ${buildPrefix}/FV/${fwPrefix}_VARS.fd
@@ -165,7 +167,7 @@ edk2.mkDerivation projectDscPath (finalAttrs: {
   postInstall = ''
     mkdir -vp $fd/FV
   '' + lib.optionalString (builtins.elem fwPrefix [
-    "OVMF" "AAVMF" "RISCV_VIRT"
+    "OVMF" "AAVMF" "RISCV_VIRT" "LOONGARCH_VIRT"
   ]) ''
     mv -v $out/FV/${fwPrefix}_{CODE,VARS}.fd $fd/FV
   '' + lib.optionalString stdenv.hostPlatform.isx86 ''