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

[Thomas Gleixner]

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