linux-kernel - RE: [PATCH v8 01/12] perf/x86/intel/pt: Move Intel-PT MSRs bit definitions to a public header

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Message-ID: <82D7661F83C1A047AF7DC287873BF1E167F7B1B8@SHSMSX101.ccr.corp.intel.com>
Date:   Wed, 16 May 2018 09:42:58 +0000
From:   "Kang, Luwei" <luwei.kang@...el.com>
To:     Alexander Shishkin <alexander.shishkin@...ux.intel.com>
CC:     "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "hpa@...or.com" <hpa@...or.com>, "x86@...nel.org" <x86@...nel.org>,
        "chao.p.peng@...ux.intel.com" <chao.p.peng@...ux.intel.com>,
        "thomas.lendacky@....com" <thomas.lendacky@....com>,
        "bp@...e.de" <bp@...e.de>, "Liang, Kan" <kan.liang@...el.com>,
        "Janakarajan.Natarajan@....com" <Janakarajan.Natarajan@....com>,
        "dwmw@...zon.co.uk" <dwmw@...zon.co.uk>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "peterz@...radead.org" <peterz@...radead.org>,
        "mathieu.poirier@...aro.org" <mathieu.poirier@...aro.org>,
        "kstewart@...uxfoundation.org" <kstewart@...uxfoundation.org>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "pbonzini@...hat.com" <pbonzini@...hat.com>,
        "rkrcmar@...hat.com" <rkrcmar@...hat.com>,
        "david@...hat.com" <david@...hat.com>,
        "bsd@...hat.com" <bsd@...hat.com>,
        "yu.c.zhang@...ux.intel.com" <yu.c.zhang@...ux.intel.com>,
        "joro@...tes.org" <joro@...tes.org>
Subject: RE: [PATCH v8 01/12] perf/x86/intel/pt: Move Intel-PT MSRs bit
 definitions to a public header

> > From: Chao Peng <chao.p.peng@...ux.intel.com>
> >
> > Intel Processor Trace virtualization enabling in KVM guest need to
> > access these MSRs bit definitions, so move them to public header file
> > msr-index.h.
> > @@ -115,6 +148,7 @@
> >  #define MSR_IA32_RTIT_ADDR2_B		0x00000585
> >  #define MSR_IA32_RTIT_ADDR3_A		0x00000586
> >  #define MSR_IA32_RTIT_ADDR3_B		0x00000587
> > +#define MSR_IA32_RTIT_ADDR_RANGE	4
> 
> This one wasn't there before, so belongs in a different patch.

What about move this definition to "arch/x86/include/asm/intel_pt.h " and be added in patch 8 (implementation of context switch).

Thanks,
Luwei Kang

> 
> Regards,
> --
> Alex