This is needed after [1], as the Checker's ISA has an invalid (nullptr) TC pointer. [1]: https://gem5-review.googlesource.com/c/public/gem5/+/29233 Signed-off-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Change-Id: I1d25096caf61f98451fca2d393d2ea1c4fca00e8 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/46623 Reviewed-by: Richard Cooper <richard.cooper@arm.com> Reviewed-by: Jason Lowe-Power <power.jg@gmail.com> Maintainer: Jason Lowe-Power <power.jg@gmail.com> Tested-by: kokoro <noreply+kokoro@google.com>