diff --git a/configure b/configure
index e39f63d01d..1ee09bd112 100755
--- a/configure
+++ b/configure
@@ -428,7 +428,7 @@ usb_redir=""
 opengl=""
 opengl_dmabuf="no"
 cpuid_h="no"
-avx2_opt="no"
+avx2_opt=""
 zlib="yes"
 capstone=""
 lzo=""
@@ -1329,6 +1329,10 @@ for opt do
   ;;
   --disable-glusterfs) glusterfs="no"
   ;;
+  --disable-avx2) avx2_opt="no"
+  ;;
+  --enable-avx2) avx2_opt="yes"
+  ;;
   --enable-glusterfs) glusterfs="yes"
   ;;
   --disable-virtio-blk-data-plane|--enable-virtio-blk-data-plane)
@@ -1703,6 +1707,7 @@ disabled with --disable-FEATURE, default is enabled if available:
   libxml2         for Parallels image format
   tcmalloc        tcmalloc support
   jemalloc        jemalloc support
+  avx2            AVX2 optimization support
   replication     replication support
   vhost-vsock     virtio sockets device support
   opengl          opengl support
@@ -5032,7 +5037,7 @@ fi
 # There is no point enabling this if cpuid.h is not usable,
 # since we won't be able to select the new routines.
 
-if test $cpuid_h = yes; then
+if test "$cpuid_h" = "yes" -a "$avx2_opt" != "no"; then
   cat > $TMPC << EOF
 #pragma GCC push_options
 #pragma GCC target("avx2")
@@ -5046,6 +5051,8 @@ int main(int argc, char *argv[]) { return bar(argv[0]); }
 EOF
   if compile_object "" ; then
     avx2_opt="yes"
+  else
+    avx2_opt="no"
   fi
 fi
 
diff --git a/default-configs/alpha-softmmu.mak b/default-configs/alpha-softmmu.mak
index bbe361f01a..eb58b40254 100644
--- a/default-configs/alpha-softmmu.mak
+++ b/default-configs/alpha-softmmu.mak
@@ -19,3 +19,4 @@ CONFIG_IDE_CMD646=y
 CONFIG_I8259=y
 CONFIG_MC146818RTC=y
 CONFIG_ISA_TESTDEV=y
+CONFIG_SMC37C669=y
diff --git a/hw/core/Makefile.objs b/hw/core/Makefile.objs
index b736ce223a..a799c83815 100644
--- a/hw/core/Makefile.objs
+++ b/hw/core/Makefile.objs
@@ -21,5 +21,4 @@ common-obj-$(CONFIG_SOFTMMU) += or-irq.o
 common-obj-$(CONFIG_SOFTMMU) += split-irq.o
 common-obj-$(CONFIG_PLATFORM_BUS) += platform-bus.o
 common-obj-$(CONFIG_SOFTMMU) += generic-loader.o
-
-obj-$(CONFIG_SOFTMMU) += null-machine.o
+common-obj-$(CONFIG_SOFTMMU) += null-machine.o
diff --git a/hw/core/null-machine.c b/hw/core/null-machine.c
index cde4d3eb57..76d3f8e39c 100644
--- a/hw/core/null-machine.c
+++ b/hw/core/null-machine.c
@@ -18,7 +18,7 @@
 #include "hw/boards.h"
 #include "sysemu/sysemu.h"
 #include "exec/address-spaces.h"
-#include "cpu.h"
+#include "qom/cpu.h"
 
 static void machine_none_init(MachineState *mch)
 {
diff --git a/hw/isa/Makefile.objs b/hw/isa/Makefile.objs
index 83e06f6c04..9e106df186 100644
--- a/hw/isa/Makefile.objs
+++ b/hw/isa/Makefile.objs
@@ -1,9 +1,10 @@
 common-obj-$(CONFIG_ISA_BUS) += isa-bus.o
-common-obj-$(CONFIG_ISA_BUS) += isa-superio.o smc37c669-superio.o
+common-obj-$(CONFIG_ISA_BUS) += isa-superio.o
 common-obj-$(CONFIG_APM) += apm.o
 common-obj-$(CONFIG_I82378) += i82378.o
 common-obj-$(CONFIG_PC87312) += pc87312.o
 common-obj-$(CONFIG_PIIX4) += piix4.o
 common-obj-$(CONFIG_VT82C686) += vt82c686.o
+common-obj-$(CONFIG_SMC37C669) += smc37c669-superio.o
 
 obj-$(CONFIG_LPC_ICH9) += lpc_ich9.o
diff --git a/po/Makefile b/po/Makefile
index e47e262ee6..c041f4c858 100644
--- a/po/Makefile
+++ b/po/Makefile
@@ -36,7 +36,7 @@ clean:
 
 install: $(OBJS)
 	for obj in $(OBJS); do \
-	    base=`basename $$obj .mo`; \
+	    base=$$(basename $$obj .mo); \
 	    $(INSTALL) -d $(DESTDIR)$(prefix)/share/locale/$$base/LC_MESSAGES; \
 	    $(INSTALL) -m644 $$obj $(DESTDIR)$(prefix)/share/locale/$$base/LC_MESSAGES/qemu.mo; \
 	done
diff --git a/tests/docker/dockerfiles/debian-bootstrap.pre b/tests/docker/dockerfiles/debian-bootstrap.pre
index 3b0ef95374..c164778c30 100755
--- a/tests/docker/dockerfiles/debian-bootstrap.pre
+++ b/tests/docker/dockerfiles/debian-bootstrap.pre
@@ -2,7 +2,7 @@
 #
 # Simple wrapper for debootstrap, run in the docker build context
 #
-FAKEROOT=`which fakeroot 2> /dev/null`
+FAKEROOT=$(which fakeroot 2> /dev/null)
 # debootstrap < 1.0.67 generates empty sources.list, see Debian#732255
 MIN_DEBOOTSTRAP_VERSION=1.0.67
 
@@ -52,7 +52,7 @@ fi
 
 if [ -z $DEBOOTSTRAP_DIR ]; then
     NEED_DEBOOTSTRAP=false
-    DEBOOTSTRAP=`which debootstrap 2> /dev/null`
+    DEBOOTSTRAP=$(which debootstrap 2> /dev/null)
     if [ -z $DEBOOTSTRAP ]; then
         echo "No debootstrap installed, attempting to install from SCM"
         NEED_DEBOOTSTRAP=true
diff --git a/tests/migration-test.c b/tests/migration-test.c
index b7920255c5..06ca5068d8 100644
--- a/tests/migration-test.c
+++ b/tests/migration-test.c
@@ -803,6 +803,22 @@ int main(int argc, char **argv)
         return 0;
     }
 
+    /*
+     * Similar to ppc64, s390x seems to be touchy with TCG, so disable it
+     * there until the problems are resolved
+     */
+    if (g_str_equal(qtest_get_arch(), "s390x")) {
+#if defined(HOST_S390X)
+        if (access("/dev/kvm", R_OK | W_OK)) {
+            g_test_message("Skipping test: kvm not available");
+            return 0;
+        }
+#else
+        g_test_message("Skipping test: Need s390x host to work properly");
+        return 0;
+#endif
+    }
+
     tmpfs = mkdtemp(template);
     if (!tmpfs) {
         g_test_message("mkdtemp on path (%s): %s\n", template, strerror(errno));