-Immediately enable events matching @var{pattern}.
-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{stderr}
+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}