linux-kernel - Re: [PATCH] perf, amd, ibs: Update IBS MSRs and feature definitions

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Date:	Sat, 8 Nov 2014 10:03:55 +0100
From:	Borislav Petkov <bp@...e.de>
To:	Aravind Gopalakrishnan <aravind.gopalakrishnan@....com>
Cc:	a.p.zijlstra@...llo.nl, paulus@...ba.org, mingo@...hat.com,
	acme@...nel.org, tglx@...utronix.de, hpa@...or.com, x86@...nel.org,
	linux-kernel@...r.kernel.org, Paolo Bonzini <pbonzini@...hat.com>,
	Jan Kiszka <jan.kiszka@...mens.com>,
	Len Brown <len.brown@...el.com>,
	Fenghua Yu <fenghua.yu@...el.com>
Subject: Re: [PATCH] perf, amd, ibs: Update IBS MSRs and feature definitions

On Thu, Nov 06, 2014 at 10:57:40AM -0600, Aravind Gopalakrishnan wrote:
> On 11/6/2014 10:34 AM, Borislav Petkov wrote:
> >On Thu, Nov 06, 2014 at 10:26:22AM -0600, Aravind Gopalakrishnan wrote:
> >>diff --git a/arch/x86/include/uapi/asm/msr-index.h b/arch/x86/include/uapi/asm/msr-index.h
> >>index e21331c..ba7b609 100644
> >>--- a/arch/x86/include/uapi/asm/msr-index.h
> >>+++ b/arch/x86/include/uapi/asm/msr-index.h
> >>@@ -206,6 +206,8 @@
> >>  #define MSR_AMD64_IBSOP_REG_MASK	((1UL<<MSR_AMD64_IBSOP_REG_COUNT)-1)
> >>  #define MSR_AMD64_IBSCTL		0xc001103a
> >>  #define MSR_AMD64_IBSBRTARGET		0xc001103b
> >>+#define MSR_AMD64_IBS_FETCH_EXTD_CTL	0xc001103c
> >>+#define MSR_AMD64_IBSOPDATA4		0xc001103d
> >>  #define MSR_AMD64_IBS_REG_COUNT_MAX	8 /* includes MSR_AMD64_IBSBRTARGET */
> >>  /* Fam 16h MSRs */

> But Why?
> IBS_CAPS_BRNTRGT and IBS_CAPS_OPDATA4 indicate support for the respective
> MSRs

Ok, I was just making sure.

Btw, MSR_AMD64_IBS_FETCH_EXTD_CTL seems unused. Forgotten?

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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