These "impelementation defined" methods are tested by the regression tests, so we need to have them. We might as well have the same general interface as the Accellera implementation since nothing there seems overly specialized for that environment. Change-Id: Ief6567fcd9d99d3a0f526cfa3b65043b2c828efa Reviewed-on: https://gem5-review.googlesource.com/11185 Reviewed-by: Gabe Black <gabeblack@google.com> Maintainer: Gabe Black <gabeblack@google.com>