This patch extends the generic hardware transactional memory support in Ruby and the O3/TimingSimpleCPU cores with the Arm-specific hardware transactional memory architectural extensions (TME). JIRA: https://gem5.atlassian.net/browse/GEM5-588 Change-Id: I8c663da977ed3e8c94635fcb11834bd001e92054 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/30329 Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Reviewed-by: Jason Lowe-Power <power.jg@gmail.com> Tested-by: kokoro <noreply+kokoro@google.com> Maintainer: Jason Lowe-Power <power.jg@gmail.com>