18 Nov
2018
18 Nov
'18
10:36 p.m.
On Sun, Nov 18, 2018 at 2:19 PM Jiri Kosina jikos@kernel.org wrote:
Which gets us back to Tim's fixup patch. Do you still prefer the revert, given the existence of that? I think that if Tim's fixup makes it through (it's currently missing SECCOMP handling, but that is trivial to add on top), it might be the best compromise. We'd also have have to make IBPB obey it to be consistent (and get even a few more % of performance back), but that's easy as well.
+1 for Tim's patch. That make us more consistent with how we handled L1TF (giving the system owner a control knob to decide whether they want this level of fixup, based on their own analysis of their vulnerability).
-Tony