build-sys: add --disable-vhost-user

Learn to compile out vhost-user (net, scsi & upcoming users). Keep it
enabled by default on non-win32, that is assumed to be POSIX. Fail if
trying to enable it on win32.

When trying to make a vhost-user netdev, it gives the following error:

-netdev vhost-user,id=foo,chardev=chr-test: Parameter 'type' expects a netdev backend type

And similar error with the HMP/QMP monitors.

While at it, rename CONFIG_VHOST_NET_TEST CONFIG_VHOST_USER_NET_TEST
since it's a vhost-user specific variable.

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

1 files changed, 26 insertions, 2 deletions

diff --git a/configure b/configure
index 987f59ba88..dd73cce62f 100755
--- a/configure
+++ b/configure
@@ -306,6 +306,7 @@ tcg="yes"
 vhost_net="no"
 vhost_scsi="no"
 vhost_vsock="no"
+vhost_user=""
 kvm="no"
 hax="no"
 rdma=""
@@ -1282,6 +1283,14 @@ for opt do
   ;;
   --enable-vxhs) vxhs="yes"
   ;;
+  --disable-vhost-user) vhost_user="no"
+  ;;
+  --enable-vhost-user)
+      vhost_user="yes"
+      if test "$mingw32" = "yes"; then
+          error_exit "vhost-user isn't available on win32"
+      fi
+  ;;
   *)
       echo "ERROR: unknown option $opt"
       echo "Try '$0 --help' for more information"
@@ -1290,6 +1299,14 @@ for opt do
   esac
 done
 
+if test "$vhost_user" = ""; then
+    if test "$mingw32" = "yes"; then
+        vhost_user="no"
+    else
+        vhost_user="yes"
+    fi
+fi
+
 case "$cpu" in
     ppc)
            CPU_CFLAGS="-m32"
@@ -1518,6 +1535,7 @@ disabled with --disable-FEATURE, default is enabled if available:
   tools           build qemu-io, qemu-nbd and qemu-image tools
   vxhs            Veritas HyperScale vDisk backend support
   crypto-afalg    Linux AF_ALG crypto backend driver
+  vhost-user      vhost-user support
 
 NOTE: The object files are built at the place where configure is launched
 EOF
@@ -5348,6 +5366,7 @@ echo "libcap-ng support $cap_ng"
 echo "vhost-net support $vhost_net"
 echo "vhost-scsi support $vhost_scsi"
 echo "vhost-vsock support $vhost_vsock"
+echo "vhost-user support $vhost_user"
 echo "Trace backends    $trace_backends"
 if have_backend "simple"; then
 echo "Trace output file $trace_file-<pid>"
@@ -5757,12 +5776,15 @@ fi
 if test "$vhost_scsi" = "yes" ; then
   echo "CONFIG_VHOST_SCSI=y" >> $config_host_mak
 fi
-if test "$vhost_net" = "yes" ; then
+if test "$vhost_net" = "yes" -a "$vhost_user" = "yes"; then
   echo "CONFIG_VHOST_NET_USED=y" >> $config_host_mak
 fi
 if test "$vhost_vsock" = "yes" ; then
   echo "CONFIG_VHOST_VSOCK=y" >> $config_host_mak
 fi
+if test "$vhost_user" = "yes" ; then
+  echo "CONFIG_VHOST_USER=y" >> $config_host_mak
+fi
 if test "$blobs" = "yes" ; then
   echo "INSTALL_BLOBS=yes" >> $config_host_mak
 fi
@@ -6358,7 +6380,9 @@ if supported_kvm_target $target; then
     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" >> $config_host_mak
+        if test "$vhost_user" = "yes" ; then
+            echo "CONFIG_VHOST_USER_NET_TEST_$target_name=y" >> $config_host_mak
+        fi
     fi
 fi
 if supported_hax_target $target; then