Specify tracing options. @table @option @item [enable=]@var{pattern} Immediately enable events matching @var{pattern} (either event name or a globbing pattern). This option is only available if QEMU has been compiled with the @var{simple}, @var{log} or @var{ftrace} tracing backend. To specify multiple events or patterns, specify the @option{-trace} option multiple times. Use @code{-trace help} to print a list of names of trace points. @item events=@var{file} Immediately enable events listed in @var{file}. The file must contain one event name (as listed in the @file{trace-events-all} file) per line; globbing patterns are accepted too. This option is only available if QEMU has been compiled with the @var{simple}, @var{log} or @var{ftrace} tracing backend. @item file=@var{file} Log output traces to @var{file}. This option is only available if QEMU has been compiled with the @var{simple} tracing backend. @end table