selftests/bpf: Update vmtests.sh to support aarch64

Add handling of aarch64 when setting QEMU options and provide the right
path to aarch64 kernel image.
Signed-off-by: Manu Bretelle <chantr4@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20221021210701.728135-4-chantr4@gmail.com

tools/testing/selftests/bpf/vmtest.sh

@@ -21,6 +21,12 @@ x86_64)
 	QEMU_FLAGS=(-cpu host -smp 8)
 	BZIMAGE="arch/x86/boot/bzImage"
 	;;
+aarch64)
+	QEMU_BINARY=qemu-system-aarch64
+	QEMU_CONSOLE="ttyAMA0,115200"
+	QEMU_FLAGS=(-M virt,gic-version=3 -cpu host -smp 8)
+	BZIMAGE="arch/arm64/boot/Image"
+	;;
 *)
 	echo "Unsupported architecture"
 	exit 1