Index: xen-4.5.0-testing/tools/Makefile
===================================================================
--- xen-4.5.0-testing.orig/tools/Makefile
+++ xen-4.5.0-testing/tools/Makefile
@@ -197,6 +197,8 @@ else
 QEMU_XEN_ENABLE_DEBUG :=
 endif
 
+QEMU_XEN_ENABLE_SPICE := $(shell if [ `/bin/arch 2>/dev/null` == "x86_64" ]; then echo "--enable-spice --enable-usb-redir"; fi)
+
 subdir-all-qemu-xen-dir: qemu-xen-dir-find
 	if test -d $(QEMU_UPSTREAM_LOC) ; then \
 		source=$(QEMU_UPSTREAM_LOC); \
@@ -222,6 +224,7 @@ subdir-all-qemu-xen-dir: qemu-xen-dir-fi
 		--datadir=$(SHAREDIR)/qemu-xen \
 		--localstatedir=$(localstatedir) \
 		--disable-kvm \
+		$(QEMU_XEN_ENABLE_SPICE) \
 		--disable-docs \
 		--disable-guest-agent \
 		--python=$(PYTHON) \