tests: re-enable vhost-user-test

Commit 7fe34ca9c2e actually disabled vhost-user-test altogether,
since CONFIG_VHOST_NET is a per-target config variable.

tests/vhost-user-test is already x86/x64 softmmu specific test, in order
to enable it correctly, kvm & vhost-net are also conditions. To check
that, set CONFIG_VHOST_NET_TEST_$target when kvm is also enabled.

Since "check-qtest-x86_64-y = $(check-qtest-i386-y)", avoid duplication
when both x86 & x64 are enabled.

Other targets than x86 aren't enabled yet, and is intentionally left as
a future improvement, since I can't easily test those.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

configure

diff --git a/configure b/configure
index f75df4b..0866bd8 100755
--- a/configure
+++ b/configure
@@ -5663,6 +5663,7 @@
       echo "CONFIG_KVM=y" >> $config_target_mak
       if test "$vhost_net" = "yes" ; then
         echo "CONFIG_VHOST_NET=y" >> $config_target_mak
+        echo "CONFIG_VHOST_NET_TEST_$target_name=y" >> $config_host_mak
       fi
     fi
 esac

tests/Makefile

diff --git a/tests/Makefile b/tests/Makefile
index 90c4141..b937984 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -197,8 +197,9 @@
 check-qtest-i386-y += tests/pc-cpu-test$(EXESUF)
 check-qtest-i386-y += tests/q35-test$(EXESUF)
 gcov-files-i386-y += hw/pci-host/q35.c
-ifeq ($(CONFIG_VHOST_NET),y)
-check-qtest-i386-$(CONFIG_LINUX) += tests/vhost-user-test$(EXESUF)
+check-qtest-i386-$(CONFIG_VHOST_NET_TEST_i386) += tests/vhost-user-test$(EXESUF)
+ifeq ($(CONFIG_VHOST_NET_TEST_i386),)
+check-qtest-x86_64-$(CONFIG_VHOST_NET_TEST_x86_64) += tests/vhost-user-test$(EXESUF)
 endif
 check-qtest-i386-y += tests/test-netfilter$(EXESUF)
 check-qtest-x86_64-y = $(check-qtest-i386-y)