[Qemu-devel] [RFC 07/11] arm/run: allow aarch64 to start arm binaries

From: "Alex Bennée" <alex.bennee@linaro.org>
To: mttcg@listserver.greensocs.com, mark.burton@greensocs.com,
	fred.konrad@greensocs.com, a.rigo@virtualopensystems.com
Cc: peter.maydell@linaro.org, drjones@redhat.com,
	a.spyridakis@virtualopensystems.com, claudio.fontana@huawei.com,
	qemu-devel@nongnu.org, will.deacon@arm.com,
	crosthwaitepeter@gmail.com, pbonzini@redhat.com,
	"Alex Bennée" <alex.bennee@linaro.org>,
	aurelien@aurel32.net, rth@twiddle.net
Subject: [Qemu-devel] [RFC 07/11] arm/run: allow aarch64 to start arm binaries
Date: Fri, 26 Feb 2016 13:15:29 +0000	[thread overview]
Message-ID: <1456492533-17171-8-git-send-email-alex.bennee@linaro.org> (raw)
In-Reply-To: <1456492533-17171-1-git-send-email-alex.bennee@linaro.org>

AArch64 hosts can happily run AArch32 binaries. We just need to ensure
that we use "cpu host,aarch64=off" when specifying the CPU type.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
 arm/run | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/arm/run b/arm/run
index 0eaf23a..f1a6b7d 100755
--- a/arm/run
+++ b/arm/run
@@ -38,7 +38,15 @@ if [ "$HOST" = "aarch64" ] && [ "$ACCEL" = "kvm" ]; then
 	fi
 fi
 
-qemu="${QEMU:-qemu-system-$ARCH_NAME}"
+if [ "$ARCH" = "arm" ] && [ "$HOST" = "aarch64" ]; then
+    qemu="${QEMU:-qemu-system-$HOST}"
+    if [ "$ACCEL" = "kvm" ]; then
+	processor="host,aarch64=off"
+    fi
+else
+	qemu="${QEMU:-qemu-system-$ARCH_NAME}"
+fi
+
 qpath=$(which $qemu 2>/dev/null)
 
 if [ -z "$qpath" ]; then
-- 
2.7.1
