linux-kernel - Re: [RFC 0/5] perf: Per PMU access controls (paranoid setting)

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Message-ID: <CAG48ez2NKxCUncbi7DSyVn0ufBEy0P29gwH=+TnWhNMT2DJgVQ@mail.gmail.com>
Date:   Mon, 1 Oct 2018 18:15:02 +0200
From:   Jann Horn <jannh@...gle.com>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     alexey.budankov@...ux.intel.com, Andi Kleen <ak@...ux.intel.com>,
        Mark Rutland <mark.rutland@....com>, tursulin@...ulin.net,
        kernel list <linux-kernel@...r.kernel.org>,
        tvrtko.ursulin@...ux.intel.com,
        Peter Zijlstra <peterz@...radead.org>,
        "the arch/x86 maintainers" <x86@...nel.org>,
        "H . Peter Anvin" <hpa@...or.com>, acme@...nel.org,
        alexander.shishkin@...ux.intel.com, jolsa@...hat.com,
        namhyung@...nel.org, maddy@...ux.vnet.ibm.com,
        Kees Cook <keescook@...omium.org>
Subject: Re: [RFC 0/5] perf: Per PMU access controls (paranoid setting)

On Mon, Oct 1, 2018 at 6:12 PM Thomas Gleixner <tglx@...utronix.de> wrote:
> From a design POV, Jann's idea to have a per PMU special file which you
> need to open for getting access is way better than the extra knobs. It
> allows to use all existing security mechanisms to be used.

(That was Mark's idea, not mine, I just agree with his idea a lot.)