OVMF: add support for http boot

Signed-off-by: Arthur Gautier <baloo@superbaloo.net>

pkgs/applications/virtualization/OVMF/default.nix

@@ -1,6 +1,7 @@
 { stdenv, lib, edk2, util-linux, nasm, iasl
 , csmSupport ? false, seabios ? null
 , secureBoot ? false
+, httpSupport ? false
 }:
 
 assert csmSupport -> seabios != null;
@@ -30,7 +31,8 @@ edk2.mkDerivation projectDscPath {
 
   buildFlags =
     lib.optional secureBoot "-DSECURE_BOOT_ENABLE=TRUE"
-    ++ lib.optionals csmSupport [ "-D CSM_ENABLE" "-D FD_SIZE_2MB" ];
+    ++ lib.optionals csmSupport [ "-D CSM_ENABLE" "-D FD_SIZE_2MB" ]
+    ++ lib.optionals httpSupport [ "-DNETWORK_HTTP_ENABLE=TRUE" "-DNETWORK_HTTP_BOOT_ENABLE=TRUE" ];
 
   postPatch = lib.optionalString csmSupport ''
     cp ${seabios}/Csm16.bin OvmfPkg/Csm/Csm16/Csm16.bin