From db9b8f36df1ae8fe6bc0337d8f25ea7b7031301e Mon Sep 17 00:00:00 2001
From: Raito Bezarius <masterancpp@gmail.com>
Date: Sat, 25 Nov 2023 13:12:30 +0100
Subject: [PATCH] OVMF: support RISC-V

Built according to https://github.com/tianocore/edk2/tree/master/OvmfPkg/RiscVVirt
and https://salsa.debian.org/qemu-team/edk2/-/commit/884f2fa7ed958d1469567a8a2648662541f138dc.
---
 .../virtualization/OVMF/default.nix             | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/pkgs/applications/virtualization/OVMF/default.nix b/pkgs/applications/virtualization/OVMF/default.nix
index 20353696d161..d46932006f49 100644
--- a/pkgs/applications/virtualization/OVMF/default.nix
+++ b/pkgs/applications/virtualization/OVMF/default.nix
@@ -22,6 +22,8 @@ let
     "OvmfPkg/OvmfPkgX64.dsc"
   else if stdenv.hostPlatform.isAarch then
     "ArmVirtPkg/ArmVirtQemu.dsc"
+  else if stdenv.hostPlatform.isRiscV then
+    "OvmfPkg/RiscVVirt/RiscVVirtQemu.dsc"
   else
     throw "Unsupported architecture";
 
@@ -69,7 +71,8 @@ edk2.mkDerivation projectDscPath (finalAttrs: {
     cp ${seabios}/Csm16.bin OvmfPkg/Csm/Csm16/Csm16.bin
   '';
 
-  postFixup = if stdenv.hostPlatform.isAarch then ''
+  postFixup = (
+    if stdenv.hostPlatform.isAarch then ''
     mkdir -vp $fd/FV
     mkdir -vp $fd/AAVMF
     mv -v $out/FV/QEMU_{EFI,VARS}.fd $fd/FV
@@ -82,10 +85,18 @@ edk2.mkDerivation projectDscPath (finalAttrs: {
     # Also add symlinks for Fedora dir layout: https://src.fedoraproject.org/cgit/rpms/edk2.git/tree/edk2.spec
     ln -s $fd/FV/AAVMF_CODE.fd $fd/AAVMF/QEMU_EFI-pflash.raw
     ln -s $fd/FV/AAVMF_VARS.fd $fd/AAVMF/vars-template-pflash.raw
-  '' else ''
+  ''
+  else if stdenv.hostPlatform.isRiscV then ''
+    mkdir -vp $fd/FV
+
+    mv -v $out/FV/RISCV_VIRT_{CODE,VARS}.fd $fd/FV/
+    truncate -s 32M $fd/FV/RISCV_VIRT_CODE.fd
+    truncate -s 32M $fd/FV/RISCV_VIRT_VARS.fd
+  ''
+  else ''
     mkdir -vp $fd/FV
     mv -v $out/FV/OVMF{,_CODE,_VARS}.fd $fd/FV
-  '';
+  '');
 
   dontPatchELF = true;