linux-kernel - perf tool pmuevents: About arm64 a76 JSON

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <749a0b8e-2bfd-28f6-b34d-dc72ef3d3a74@huawei.com>
Date:   Wed, 2 Oct 2019 16:37:00 +0100
From:   John Garry <john.garry@...wei.com>
To:     <James.Clark@....com>
CC:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        <seanvk.dev@...gontracks.org>,
        Florian Fainelli <f.fainelli@...il.com>, <wcohen@...hat.com>,
        Ganapatrao Kulkarni <gklkml16@...il.com>,
        Will Deacon <will@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: perf tool pmuevents: About arm64 a76 JSON

Hi,

I noticed that the JSON to support a76 pmu events was added recently.

May I ask why we add explicit support for the common architectural and 
microarch events (event id 0x0-0x3f), when they would be already 
available from the kernel pmuv3 driver?

The ampere emag jsons do similar. Others don't.

The only advantage I see is that we have an event description, but I am 
sure how useful that is.

Cheers,
John