commit d3ec34201c14d551e864372a89ccddb1c255e77a
author Nikos Nikoleris <nikos.nikoleris@arm.com> Mon Oct 09 13:57:49 2017 +0100
committer Nikos Nikoleris <nikos.nikoleris@arm.com> Tue Nov 21 13:54:35 2017 +0000
tree 89bc694a57a35a5bdf9d4e33f5530c4dd6ee95bf
parent 2ec997fb73eab01229909f0c91f7ff5456f7250a

cpu-o3: Prevent cpu from suspending if it is already draining

Suspending the current thread context while draining due to a quiesce
pseudo instruction (for example a wfi instruction) could deadlock the
cpu and prevent it from successfully draining. This change ensures
that the cpu is not draining before suspending the thread context.

Change-Id: I7c019847f5a870d4bc9ce2b19936bc3dc45e5fd7
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/5881
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>