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SubjectRe: [PATCH v5 2/2] x86/speculation: Enable cross-hyperthread spectre v2 STIBP mitigation
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.

Thanks,

tglx

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