From b9cb18206a301daef2a843c024da578eaa3f4a91 Mon Sep 17 00:00:00 2001
From: Gerd Hoffmann <kraxel@redhat.com>
Date: Fri, 8 Nov 2024 10:12:50 +0100
Subject: [PATCH] OvmfPkg: add fw_cfg option for virtio-net support

Use UefiDriverEntryPointFwCfgOverrideLib for VirtioNetDxe so the driver
can be enabled/disabled via fw_cfg option.

usage: qemu -fw_cfg name=opt/org.tianocore/VirtioNetSupport,string={yes,no}

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 OvmfPkg/Include/Dsc/NetworkComponents.dsc.inc | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/OvmfPkg/Include/Dsc/NetworkComponents.dsc.inc b/OvmfPkg/Include/Dsc/NetworkComponents.dsc.inc
index 28515d6e4f..fcc3a780e3 100644
--- a/OvmfPkg/Include/Dsc/NetworkComponents.dsc.inc
+++ b/OvmfPkg/Include/Dsc/NetworkComponents.dsc.inc
@@ -35,6 +35,11 @@
     }
   !endif
 
-  OvmfPkg/VirtioNetDxe/VirtioNet.inf
+  OvmfPkg/VirtioNetDxe/VirtioNet.inf {
+    <LibraryClasses>
+      UefiDriverEntryPoint|OvmfPkg/Library/UefiDriverEntryPointFwCfgOverrideLib/UefiDriverEntryPointFwCfgOverrideLib.inf
+    <PcdsFixedAtBuild>
+      gUefiOvmfPkgTokenSpaceGuid.PcdEntryPointOverrideFwCfgVarName|"opt/org.tianocore/VirtioNetSupport"
+  }
 
 !endif