qemu/qemu-option-trace.texi
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   1Specify tracing options.
   2
   3@table @option
   4@item [enable=]@var{pattern}
   5Immediately enable events matching @var{pattern}.
   6The file must contain one event name (as listed in the @file{trace-events-all}
   7file) per line; globbing patterns are accepted too.  This option is only
   8available if QEMU has been compiled with the @var{simple}, @var{log}
   9or @var{ftrace} tracing backend.  To specify multiple events or patterns,
  10specify the @option{-trace} option multiple times.
  11
  12Use @code{-trace help} to print a list of names of trace points.
  13
  14@item events=@var{file}
  15Immediately enable events listed in @var{file}.
  16The file must contain one event name (as listed in the @file{trace-events-all}
  17file) per line; globbing patterns are accepted too.  This option is only
  18available if QEMU has been compiled with the @var{simple}, @var{log} or
  19@var{ftrace} tracing backend.
  20
  21@item file=@var{file}
  22Log output traces to @var{file}.
  23This option is only available if QEMU has been compiled with
  24the @var{simple} tracing backend.
  25@end table
  26