Re: [PATCH RFC 1/2] perf/x86/intel: make reusable LBR initialization code

[Peter Zijlstra]

On Wed, Dec 06, 2017 at 02:43:02PM +0300, Jan Dakinevich wrote:
> This patch introduces globally visible intel_pmu_lbr_fill() routine,
> which gathers information which LBR MSRs are support for specific CPU
> family/model.
> 
> It is supposed that the routine would be used in KVM code, using guest
> CPU information as an input. By this reason, it should not have any side
> effect which could affect host system.
> 
>  * LBR information moved to separate structure `struct x86_pmu_lbr';
>  * All family-specific tweaks on gathered information are applied only
>    for global x86_pmu.lbr to keep current perf initialization behavior.
> 
> Signed-off-by: Jan Dakinevich <jan.dakinevich@xxxxxxxxxxxxx>

Hurch, that's a lot of churn. Nothing bad stood out though.