On Tue, 11 Sep 2018, Thomas Gleixner wrote: > On Tue, 11 Sep 2018, Tim Chen wrote: > > On 09/10/2018 04:46 AM, Jiri Kosina wrote: > > > Nah, IBPB is actuall there, sorry. So I'll add reporting of STIBP + fixup > > > the missing reporting of RSB_CTXSW for v6. > > > > > > > I anticipate that STIBP could affect workloads with a lot of indirect > > branches (see previous discussion with Andrea). We should have a > > knob for people to opt in or opt out of STIBP. > > Feel free to send a patch to that effect.
Along with a proper explanation why it makes sense to disable this particular piece separate from the rest of the V2 mitigations. You surely can come up with a rationale based on facts rather than on anticipations. Thanks, tglx