linux-kernel - Re: [PATCH 4/4] riscv: Enable perf counters user access only through perf

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Date:   Mon, 1 May 2023 09:09:38 +0700
From:   Bagas Sanjaya <bagasdotme@...il.com>
To:     Alexandre Ghiti <alexghiti@...osinc.com>,
        Jonathan Corbet <corbet@....net>,
        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>,
        Ian Rogers <irogers@...gle.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Atish Patra <atishp@...shpatra.org>,
        Anup Patel <anup@...infault.org>,
        Will Deacon <will@...nel.org>, Rob Herring <robh@...nel.org>,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-perf-users@...r.kernel.org, linux-riscv@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 4/4] riscv: Enable perf counters user access only through
 perf

On 4/13/23 23:17, Alexandre Ghiti wrote:
> +The default value is 2, it enables the legacy mode, that is user space has
> +direct access to cycle, time and insret CSRs only.
>  

"The default value is 2, which enables legacy mode (user space has direct
access to cycle, time, and insret CSRs only)."

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