build: move vhost-user-fs configuration to Kconfig

vhost-user-fs is a device and it should be possible to enable/disable
it with --without-default-devices, not --without-default-features.
Compute its default value in Kconfig to obtain the more intuitive
behavior.

In this case the configure options were undocumented, too.

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

configure

@@ -286,7 +286,6 @@ vhost_kernel="$default_feature"
 vhost_net="$default_feature"
 vhost_crypto="$default_feature"
 vhost_user="no"
-vhost_user_fs="$default_feature"
 vhost_vdpa="$default_feature"
 debug_tcg="no"
 sanitizers="no"
@@ -873,10 +872,6 @@ for opt do
   ;;
   --enable-vhost-crypto) vhost_crypto="yes"
   ;;
-  --disable-vhost-user-fs) vhost_user_fs="no"
-  ;;
-  --enable-vhost-user-fs) vhost_user_fs="yes"
-  ;;
   --disable-zlib-test)
   ;;
   --disable-virtio-blk-data-plane|--enable-virtio-blk-data-plane)
@@ -1537,10 +1532,6 @@ test "$vhost_crypto" = "" && vhost_crypto=$vhost_user
 if test "$vhost_crypto" = "yes" && test "$vhost_user" = "no"; then
   error_exit "--enable-vhost-crypto requires --enable-vhost-user"
 fi
-test "$vhost_user_fs" = "" && vhost_user_fs=$vhost_user
-if test "$vhost_user_fs" = "yes" && test "$vhost_user" = "no"; then
-  error_exit "--enable-vhost-user-fs requires --enable-vhost-user"
-fi
 
 # OR the vhost-kernel, vhost-vdpa and vhost-user values for simplicity
 if test "$vhost_net" = ""; then
@@ -2089,9 +2080,6 @@ fi
 if test "$vhost_vdpa" = "yes" ; then
   echo "CONFIG_VHOST_VDPA=y" >> $config_host_mak
 fi
-if test "$vhost_user_fs" = "yes" ; then
-  echo "CONFIG_VHOST_USER_FS=y" >> $config_host_mak
-fi
 
 # XXX: suppress that
 if [ "$bsd" = "yes" ] ; then

hw/virtio/Kconfig

@@ -78,3 +78,8 @@ config VHOST_USER_RNG
     bool
     default y
     depends on VIRTIO && VHOST_USER
+
+config VHOST_USER_FS
+    bool
+    default y
+    depends on VIRTIO && VHOST_USER

meson.build

@@ -3692,7 +3692,6 @@ summary_info += {'vhost-net support': config_host.has_key('CONFIG_VHOST_NET')}
 summary_info += {'vhost-crypto support': config_host.has_key('CONFIG_VHOST_CRYPTO')}
 summary_info += {'vhost-user support': config_host.has_key('CONFIG_VHOST_USER')}
 summary_info += {'vhost-user-blk server support': have_vhost_user_blk_server}
-summary_info += {'vhost-user-fs support': config_host.has_key('CONFIG_VHOST_USER_FS')}
 summary_info += {'vhost-vdpa support': config_host.has_key('CONFIG_VHOST_VDPA')}
 summary_info += {'build guest agent': have_ga}
 summary(summary_info, bool_yn: true, section: 'Configurable features')