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@@ -2501,6 +2501,14 @@ enabled via the ``-machine usb=on'' argument.
The ``-nodefconfig`` argument is a synonym for ``-no-user-config``.
+@subsection -machine s390-squash-mcss=on|off (since 2.12.0)
+
+The ``s390-squash-mcss=on`` property has been obsoleted by allowing the
+cssid to be chosen freely. Instead of squashing subchannels into the
+default channel subsystem image for guests that do not support multiple
+channel subsystems, all devices can be put into the default channel
+subsystem image.
+
@section qemu-img command line arguments
@subsection convert -s (since 2.0.0)