From cd2e4ed389df6d6dabaa530ee5280be8beabe293 Mon Sep 17 00:00:00 2001
From: Helmut Grohne <helmut@subdivi.de>
Date: Wed, 25 Jan 2023 12:39:54 +0100
Subject: debvm-run: disable kvm for armhf -> arm64 when the cpu cannot run it

Reported-by: Arnd Bergmann <arnd@arndb.de>
---
 bin/debvm-run | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'bin')

diff --git a/bin/debvm-run b/bin/debvm-run
index 0e9403f..0d2ee95 100755
--- a/bin/debvm-run
+++ b/bin/debvm-run
@@ -292,7 +292,19 @@ case "$KERNELARCH" in
 	;;
 esac
 
+ENABLE_KVM=no
 if test "$ARCHITECTURE" = "$KERNELARCH"; then
+	ENABLE_KVM=yes
+	case "$VMARCH:$KERNELARCH" in
+		arm:arm64|armel:arm64|armhf:arm64)
+			if ! linux32 true >/dev/null 2>&1; then
+				# This arm64 cannot run 32bit arm, so don't try KVM.
+				ENABLE_KVM=no
+			fi
+		;;
+	esac
+fi
+if test "$ENABLE_KVM" = yes; then
 	if ! command -v "$QEMU" >/dev/null 2>&1; then
 		# Fall back to kvm in case we badly guessed qemu.
 		QEMU=kvm
-- 
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