linux-kernel - Re: [PATCH 02/13] perf_events: add Intel LBR MSR definitions (v3)

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Date:	Fri, 27 Jan 2012 10:33:23 +0530
From:	Anshuman Khandual <khandual@...ux.vnet.ibm.com>
To:	Stephane Eranian <eranian@...gle.com>
CC:	linux-kernel@...r.kernel.org, peterz@...radead.org, mingo@...e.hu,
	acme@...radead.org, robert.richter@....com, ming.m.lin@...el.com,
	andi@...stfloor.org, asharma@...com, ravitillo@....gov,
	vweaver1@...s.utk.edu
Subject: Re: [PATCH 02/13] perf_events: add Intel LBR MSR definitions (v3)

On Monday 09 January 2012 10:19 PM, Stephane Eranian wrote:
> This patch adds the LBR definitions for NHM/WSM/SNB and Core.
> It also adds the definitions for the architected LBR MSR:
> LBR_SELECT, LBRT_TOS.
> 
> Signed-off-by: Stephane Eranian <eranian@...gle.com>
  Reviewed   by: Anshuman Khandual <khandual@...ux.vnet.ibm.com>
> ---
>  arch/x86/include/asm/msr-index.h           |    7 +++++++
>  arch/x86/kernel/cpu/perf_event_intel_lbr.c |   18 +++++++++---------
>  2 files changed, 16 insertions(+), 9 deletions(-)
> 
> diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h
> index a6962d9..ccb8059 100644
> --- a/arch/x86/include/asm/msr-index.h
> +++ b/arch/x86/include/asm/msr-index.h
> @@ -56,6 +56,13 @@
>  #define MSR_OFFCORE_RSP_0		0x000001a6
>  #define MSR_OFFCORE_RSP_1		0x000001a7
> 
> +#define MSR_LBR_SELECT			0x000001c8
> +#define MSR_LBR_TOS			0x000001c9
> +#define MSR_LBR_NHM_FROM		0x00000680
> +#define MSR_LBR_NHM_TO			0x000006c0
> +#define MSR_LBR_CORE_FROM		0x00000040
> +#define MSR_LBR_CORE_TO			0x00000060
> +
>  #define MSR_IA32_PEBS_ENABLE		0x000003f1
>  #define MSR_IA32_DS_AREA		0x00000600
>  #define MSR_IA32_PERF_CAPABILITIES	0x00000345
> diff --git a/arch/x86/kernel/cpu/perf_event_intel_lbr.c b/arch/x86/kernel/cpu/perf_event_intel_lbr.c
> index c3f8100..e14431f 100644
> --- a/arch/x86/kernel/cpu/perf_event_intel_lbr.c
> +++ b/arch/x86/kernel/cpu/perf_event_intel_lbr.c
> @@ -205,23 +205,23 @@ void intel_pmu_lbr_read(void)
>  void intel_pmu_lbr_init_core(void)
>  {
>  	x86_pmu.lbr_nr     = 4;
> -	x86_pmu.lbr_tos    = 0x01c9;
> -	x86_pmu.lbr_from   = 0x40;
> -	x86_pmu.lbr_to     = 0x60;
> +	x86_pmu.lbr_tos    = MSR_LBR_TOS;
> +	x86_pmu.lbr_from   = MSR_LBR_CORE_FROM;
> +	x86_pmu.lbr_to     = MSR_LBR_CORE_TO;
>  }
> 
>  void intel_pmu_lbr_init_nhm(void)
>  {
>  	x86_pmu.lbr_nr     = 16;
> -	x86_pmu.lbr_tos    = 0x01c9;
> -	x86_pmu.lbr_from   = 0x680;
> -	x86_pmu.lbr_to     = 0x6c0;
> +	x86_pmu.lbr_tos    = MSR_LBR_TOS;
> +	x86_pmu.lbr_from   = MSR_LBR_NHM_FROM;
> +	x86_pmu.lbr_to     = MSR_LBR_NHM_TO;
>  }
> 
>  void intel_pmu_lbr_init_atom(void)
>  {
>  	x86_pmu.lbr_nr	   = 8;
> -	x86_pmu.lbr_tos    = 0x01c9;
> -	x86_pmu.lbr_from   = 0x40;
> -	x86_pmu.lbr_to     = 0x60;
> +	x86_pmu.lbr_tos    = MSR_LBR_TOS;
> +	x86_pmu.lbr_from   = MSR_LBR_CORE_FROM;
> +	x86_pmu.lbr_to     = MSR_LBR_CORE_TO;
>  }


-- 
Linux Technology Centre
IBM Systems and Technology Group
Bangalore India

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