With --debug-activate option, user can add the target names into activate list of debug log. For example, with "--debug-activate=system.AAA.bus --debug-flags=IOXBar" We can enable the logs of a specified bus. Change-Id: I89ce87d784ae9736708bbc976a6bad58732bd5da Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/70618 Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu> Reviewed-by: Jason Lowe-Power <power.jg@gmail.com> Tested-by: kokoro <noreply+kokoro@google.com> Maintainer: Jason Lowe-Power <power.jg@gmail.com>