linux-kernel - Re: [PATCH 3/6] perf cs-etm: Save TRCDEVARCH register

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Date:   Tue, 3 Aug 2021 13:34:36 +0100
From:   James Clark <james.clark@....com>
To:     Leo Yan <leo.yan@...aro.org>, Mike Leach <mike.leach@...aro.org>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Coresight ML <coresight@...ts.linaro.org>,
        Al Grant <al.grant@....com>,
        "Suzuki K. Poulose" <suzuki.poulose@....com>,
        Anshuman Khandual <anshuman.khandual@....com>,
        John Garry <john.garry@...wei.com>,
        Will Deacon <will@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-perf-users@...r.kernel.org
Subject: Re: [PATCH 3/6] perf cs-etm: Save TRCDEVARCH register



On 31/07/2021 07:37, Leo Yan wrote:
>>> diff --git a/tools/perf/arch/arm/util/cs-etm.c b/tools/perf/arch/arm/util/cs-etm.c
>>> index 85168d87b2d7..65a863bdf5cc 100644
>>> --- a/tools/perf/arch/arm/util/cs-etm.c
>>> +++ b/tools/perf/arch/arm/util/cs-etm.c
>>> @@ -53,6 +53,7 @@ static const char *metadata_etmv4_ro[CS_ETMV4_PRIV_MAX] = {
>>>         [CS_ETMV4_TRCIDR2]              = "trcidr/trcidr2",
>>>         [CS_ETMV4_TRCIDR8]              = "trcidr/trcidr8",
>>>         [CS_ETMV4_TRCAUTHSTATUS]        = "mgmt/trcauthstatus",
>>> +       [CS_ETE_TRCDEVARCH]             = "mgmt/trcdevarch"
> ETMv4 supports TRCDEVARCH, so I think it's good to use the naming
> "CS_ETMV4_TRCDEVARCH"?
> 

Based on the other discussions do you still think I should do this?

As part of the new magic number I moved it into a new enum so it
might be clearer now?

James