[PATCH 4/5] hw/char/virtio-serial: Do not expose the 'emergency-write' property

["Philippe Mathieu-Daudé" <philmd@linaro.org>]

The VIRTIO_CONSOLE_F_EMERG_WRITE feature bit was only set
in the hw_compat_2_7[] array, via the 'emergency-write=off'
property. We removed all machines using that array, lets remove
that property. All instances have this feature bit set and
it can not be disabled.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 hw/char/virtio-serial-bus.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/hw/char/virtio-serial-bus.c b/hw/char/virtio-serial-bus.c
index eb79f5258b6..31bd1b7535d 100644
--- a/hw/char/virtio-serial-bus.c
+++ b/hw/char/virtio-serial-bus.c
@@ -1019,6 +1019,13 @@ static void virtser_port_device_unrealize(DeviceState *dev)
     }
 }
 
+static void virtio_serial_instance_init(Object *obj)
+{
+    VirtIOSerial *vser = VIRTIO_SERIAL(obj);
+
+    vser->host_features |= BIT_ULL(VIRTIO_CONSOLE_F_EMERG_WRITE);
+}
+
 static void virtio_serial_device_realize(DeviceState *dev, Error **errp)
 {
     VirtIODevice *vdev = VIRTIO_DEVICE(dev);
@@ -1155,8 +1162,6 @@ static const VMStateDescription vmstate_virtio_console = {
 static const Property virtio_serial_properties[] = {
     DEFINE_PROP_UINT32("max_ports", VirtIOSerial, serial.max_virtserial_ports,
                                                   31),
-    DEFINE_PROP_BIT64("emergency-write", VirtIOSerial, host_features,
-                      VIRTIO_CONSOLE_F_EMERG_WRITE, true),
 };
 
 static void virtio_serial_class_init(ObjectClass *klass, const void *data)
@@ -1186,6 +1191,7 @@ static void virtio_serial_class_init(ObjectClass *klass, const void *data)
 static const TypeInfo virtio_device_info = {
     .name = TYPE_VIRTIO_SERIAL,
     .parent = TYPE_VIRTIO_DEVICE,
+    .instance_init = virtio_serial_instance_init,
     .instance_size = sizeof(VirtIOSerial),
     .class_init = virtio_serial_class_init,
     .interfaces = (const InterfaceInfo[]) {
-- 
2.47.1