linux-kernel - Re: [perf] unchecked MSR access error: WRMSR to 0x689 in intel_pmu_lbr

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Date:   Tue, 12 Jul 2022 15:39:56 -0400 (EDT)
From:   Vince Weaver <vincent.weaver@...ne.edu>
To:     Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>
cc:     "Liang, Kan" <kan.liang@...ux.intel.com>,
        Vince Weaver <vincent.weaver@...ne.edu>,
        linux-kernel@...r.kernel.org,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>
Subject: Re: [perf] unchecked MSR access error: WRMSR to 0x689 in
 intel_pmu_lbr_restore

On Mon, 11 Jul 2022, Pawan Gupta wrote:

> Output of below would be helpful:
> 
> # grep "rtm\|hle" /proc/cpuinfo

no results

> ARCH_CAP
> # rdmsr 0x10a

rdmsr: CPU 0 cannot read MSR 0x0000010a

> TSX_CTRL
> # rdmsr 0x122

rdmsr: CPU 0 cannot read MSR 0x00000122

> MCU_OPT_CTRL
> # rdmsr 0x123

0
 
> TSX_FORCE_ABORT
> # rdmsr 0x10f

rdmsr: CPU 0 cannot read MSR 0x0000010f


This is on a Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz
Family model stepping: 6/60/3

Vince