stdlib: Add _post_instantiate function

This function will be called on the board after m5.instantiate is
called. This is useful, for instance, to start traffic generators.
Currently all implementations simply `pass`.

Change-Id: Ie2ab3fdddca5f3978d98191e5c08504561587fbb
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/64016
Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu>
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>
Tested-by: kokoro <noreply+kokoro@google.com>
5 files changed