From 4baff8e17b8f62f0e399d95b7fdcadc0c1a9719c Mon Sep 17 00:00:00 2001
From: Zejun Zhao <jelly.zhao.42@gmail.com>
Date: Sun, 6 Apr 2025 18:05:47 +0800
Subject: [PATCH] Fallback to BIOS when using legacy boot protocols

---
 Makefile | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Makefile b/Makefile
index 94b50d674..3317c833a 100644
--- a/Makefile
+++ b/Makefile
@@ -85,6 +85,14 @@ BOOT_PROTOCOL = linux-efi-handover64
 CARGO_OSDK_ARGS += --scheme tdx
 endif
 
+ifeq ($(BOOT_PROTOCOL), linux-legacy32)
+BOOT_METHOD = qemu-direct
+OVMF = off
+else ifeq ($(BOOT_PROTOCOL), multiboot)
+BOOT_METHOD = qemu-direct
+OVMF = off
+endif
+
 ifneq ($(SCHEME), "")
 CARGO_OSDK_ARGS += --scheme $(SCHEME)
 else