This change has been introduced as we only restore to one checkpoint at a time. The change updates LoopPointRestore to take a sigular region_id and use it to generate the LoopPpoint from the LoopPoint JSON file. Change-Id: I0e88d5ba03b164bdd5da098397f44e16af591134 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/67492 Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu> Maintainer: Bobby Bruce <bbruce@ucdavis.edu> Tested-by: kokoro <noreply+kokoro@google.com>