* Jaswinder Singh Rajput <jaswinder@xxxxxxxxxx> wrote:
> On Mon, 2009-05-11 at 12:02 +0200, Ingo Molnar wrote:
> > * Jaswinder Singh Rajput <jaswinder@xxxxxxxxxx> wrote:
> >
> > > There is one more way to check performance monitor support for
> > > Intel by using IA32_MISC_ENABLE MSR (0x1A0) bit 7 tells whether
> > > performance monitoring is available or not.
> > >
> > > But IA32_MISC_ENABLE MSR (0x1A0) is not available for Pentium and
> > > P6.
> > >
> > > So better I will add new cpufeature for performance monitoring for
> > > x86:
> > >
> > > X86_FEATURE_PERFMON : Performance monitor support
> >
> > What is the exact wording of IA32_MISC_ENABLE bit 7 in the Intel
> > documents?
> >
>
> Bit 7: Performance Monitoring Available. (R)
> 1 = Performance monitoring enabled
> 0 = Performance monitoring disabled
i guess, if 'perfmon' is not used yet ('arch_perfmon' is), we could
add this as a separate, new cpu features flag.
Although the confusion factor is high ...
Ingo
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