panic_if and fail_if should happen at most once in any given simulation, and warn_if, etc., should still not happen most of the time. Change-Id: Iaa6cb03c11b86d84f51cc4738efb8f203de4201c Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/34817 Reviewed-by: Jason Lowe-Power <power.jg@gmail.com> Maintainer: Jason Lowe-Power <power.jg@gmail.com> Tested-by: kokoro <noreply+kokoro@google.com>