Re: [Xen-devel] [PATCH v2 2/6] xen/PMU: Sysfs interface for setting Xen PMU mode

[Dietmar Hahn <dietmar.hahn@xxxxxxxxxxxxxx>]

Am Mittwoch 11 Juni 2014, 08:53:13 schrieb Boris Ostrovsky:
> On 06/11/2014 06:13 AM, Dietmar Hahn wrote:
> >
> > +
> > +
> > +/*
> > + * PMU features:
> > + * - XENPMU_FEATURE_INTEL_BTS: Intel BTS support (ignored on AMD)
> > + */
> > +#define XENPMU_FEATURE_INTEL_BTS  1
> > Is this XENPMU_FEATURE_INTEL_BTS really needed on the the linux side?
> > I would think it's a hypervisor internal feature.
> 
> 
> Features are controlled (enabled/disabled) by dom0 via 
> /sys/hypervisor/pmu/pmu_features so we need to have dom0 and the 
> hypervisor agree on what the bits mean.

OK, I understand. Then I'll find it in the user land part.

Dietmar.

> 
> -boris
> 


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