x86: Force strict ordering for memory mapped m5ops
Review Request #3594 - Created Aug. 4, 2016 and submitted
| Information | |
|---|---|
| Michael LeBeane | |
| gem5 | |
| default | |
| Reviewers | |
| Default | |
Changeset 11560:c9ad5bbea4b2 --------------------------- x86: Force strict ordering for memory mapped m5ops Normal MMAPPED_IPR requests are allowed to execute speculatively under the assumption that they have no side effects. The special case of m5ops that are treated like MMAPPED_IPR should not be allowed to execute speculatively, since they can have side-effects. Adding the STRICT_ORDER flag to these requests blocks execution until the associated instruction hits the ROB head.
Whoops. (facepalm) I should have realised that when I wrote the code years ago.
Ship It!