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Re: [PATCH v1 2/5] perf/x86/intel/pt: IP filtering register/cpuid bits

From Peter Zijlstra <peterz@infradead.org>
Newsgroups linux.kernel
Subject Re: [PATCH v1 2/5] perf/x86/intel/pt: IP filtering register/cpuid bits
Date 2016-04-21 21:20 +0200
Message-ID <rqsiS-5YO-7@gated-at.bofh.it> (permalink)
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On Thu, Apr 21, 2016 at 08:55:38PM +0200, Thomas Gleixner wrote:
> On Thu, 21 Apr 2016, Borislav Petkov wrote:
> > > +#define MSR_IA32_RTIT_ADDR0_A		0x00000580
> > > +#define MSR_IA32_RTIT_ADDR0_B		0x00000581
> > > +#define MSR_IA32_RTIT_ADDR1_A		0x00000582
> > > +#define MSR_IA32_RTIT_ADDR1_B		0x00000583
> > > +#define MSR_IA32_RTIT_ADDR2_A		0x00000584
> > > +#define MSR_IA32_RTIT_ADDR2_B		0x00000585
> > > +#define MSR_IA32_RTIT_ADDR3_A		0x00000586
> > > +#define MSR_IA32_RTIT_ADDR3_B		0x00000587
> > 
> > So can we not turn msr-index.h a dumping ground for MSRs pls?
> > 
> > If those are only PT-relevant, why not define them all in pt.h?
> 
> I have to disagree here. The MSRs itself can really go into msr-index.h while
> the bit definitions might go elsewhere. What's wrong with having all MSRs at a
> central place?

So I agree with Thomas; the risk of not doing this is that we'll
introduce the same MSR again, in another file, under another name.

That's confusion we can do without.

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Thread

[PATCH v1 2/5] perf/x86/intel/pt: IP filtering register/cpuid bits Alexander Shishkin <alexander.shishkin@linux.intel.com> - 2016-04-21 17:40 +0200
  Re: [PATCH v1 2/5] perf/x86/intel/pt: IP filtering register/cpuid  bits Borislav Petkov <bp@alien8.de> - 2016-04-21 19:50 +0200
    Re: [PATCH v1 2/5] perf/x86/intel/pt: IP filtering register/cpuid  bits Thomas Gleixner <tglx@linutronix.de> - 2016-04-21 21:00 +0200
      Re: [PATCH v1 2/5] perf/x86/intel/pt: IP filtering register/cpuid  bits Peter Zijlstra <peterz@infradead.org> - 2016-04-21 21:20 +0200
        Re: [PATCH v1 2/5] perf/x86/intel/pt: IP filtering register/cpuid  bits Borislav Petkov <bp@alien8.de> - 2016-04-21 22:50 +0200
      Re: [PATCH v1 2/5] perf/x86/intel/pt: IP filtering register/cpuid  bits Borislav Petkov <bp@alien8.de> - 2016-04-21 22:40 +0200
        Re: [PATCH v1 2/5] perf/x86/intel/pt: IP filtering register/cpuid  bits Thomas Gleixner <tglx@linutronix.de> - 2016-04-22 10:10 +0200
          Re: [PATCH v1 2/5] perf/x86/intel/pt: IP filtering register/cpuid  bits Borislav Petkov <bp@alien8.de> - 2016-04-22 11:40 +0200

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