build: move vhost-vsock configuration to Kconfig

vhost-vsock and vhost-user-vsock are two devices of their own; it should
be possible to enable/disable them with --without-default-devices, not
--without-default-features.  Compute their default value in Kconfig to
obtain the more intuitive behavior.

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="$default_feature"
 vhost_scsi="$default_feature"
-vhost_vsock="$default_feature"
 vhost_user="no"
 vhost_user_fs="$default_feature"
 vhost_vdpa="$default_feature"
@@ -879,10 +878,6 @@ for opt do
   ;;
   --enable-vhost-scsi) vhost_scsi="yes"
   ;;
-  --disable-vhost-vsock) vhost_vsock="no"
-  ;;
-  --enable-vhost-vsock) vhost_vsock="yes"
-  ;;
   --disable-vhost-user-fs) vhost_user_fs="no"
   ;;
   --enable-vhost-user-fs) vhost_user_fs="yes"
@@ -1109,7 +1104,6 @@ cat << EOF
   safe-stack      SafeStack Stack Smash Protection. Depends on
                   clang/llvm >= 3.7 and requires coroutine backend ucontext.
   vhost-net       vhost-net kernel acceleration support
-  vhost-vsock     virtio sockets device support
   vhost-scsi      vhost-scsi kernel target support
   vhost-crypto    vhost-user-crypto backend support
   vhost-kernel    vhost kernel backend support
@@ -1549,10 +1543,6 @@ test "$vhost_scsi" = "" && vhost_scsi=$vhost_kernel
 if test "$vhost_scsi" = "yes" && test "$vhost_kernel" != "yes"; then
   error_exit "--enable-vhost-scsi requires --enable-vhost-kernel"
 fi
-test "$vhost_vsock" = "" && vhost_vsock=$vhost_kernel
-if test "$vhost_vsock" = "yes" && test "$vhost_kernel" != "yes"; then
-  error_exit "--enable-vhost-vsock requires --enable-vhost-kernel"
-fi
 
 # vhost-user backends
 test "$vhost_crypto" = "" && vhost_crypto=$vhost_user
@@ -2105,12 +2095,6 @@ fi
 if test "$vhost_crypto" = "yes" ; then
   echo "CONFIG_VHOST_CRYPTO=y" >> $config_host_mak
 fi
-if test "$vhost_vsock" = "yes" ; then
-  echo "CONFIG_VHOST_VSOCK=y" >> $config_host_mak
-  if test "$vhost_user" = "yes" ; then
-    echo "CONFIG_VHOST_USER_VSOCK=y" >> $config_host_mak
-  fi
-fi
 if test "$vhost_kernel" = "yes" ; then
   echo "CONFIG_VHOST_KERNEL=y" >> $config_host_mak
 fi

hw/virtio/Kconfig

@@ -59,6 +59,16 @@ config VIRTIO_MEM
     depends on VIRTIO_MEM_SUPPORTED
     select MEM_DEVICE
 
+config VHOST_VSOCK
+    bool
+    default y
+    depends on VIRTIO && VHOST_KERNEL
+
+config VHOST_USER_VSOCK
+    bool
+    default y
+    depends on VIRTIO && VHOST_USER
+
 config VHOST_USER_I2C
     bool
     default y

meson.build

@@ -3692,7 +3692,6 @@ summary_info += {'vhost-kernel support': config_host.has_key('CONFIG_VHOST_KERNE
 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-scsi support': config_host.has_key('CONFIG_VHOST_SCSI')}
-summary_info += {'vhost-vsock support': config_host.has_key('CONFIG_VHOST_VSOCK')}
 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')}

scripts/ci/org.centos/stream/8/x86_64/configure

@@ -136,7 +136,6 @@
 --disable-vhost-user \
 --disable-vhost-user-blk-server \
 --disable-vhost-vdpa \
---disable-vhost-vsock \
 --disable-virglrenderer \
 --disable-virtfs \
 --disable-virtiofsd \
@@ -198,7 +197,6 @@
 --enable-vhost-user \
 --enable-vhost-user-blk-server \
 --enable-vhost-vdpa \
---enable-vhost-vsock \
 --enable-vnc \
 --enable-png \
 --enable-vnc-sasl \