linux-kernel - Re: [tip: perf/core] perf/amd/ibs: Make IBS a core pmu

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Message-ID: <f8fe9862-45e1-6557-8944-1319258ed625@amd.com>
Date:   Fri, 9 Dec 2022 09:02:28 +0530
From:   Ravi Bangoria <ravi.bangoria@....com>
To:     Borislav Petkov <bp@...en8.de>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     linux-tip-commits@...r.kernel.org,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Ian Rogers <irogers@...gle.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org, Ravi Bangoria <ravi.bangoria@....com>
Subject: Re: [tip: perf/core] perf/amd/ibs: Make IBS a core pmu

On 08-Dec-22 8:49 PM, Borislav Petkov wrote:
> I believe this is one of the things Linus wanted to have on AMD hw.

Yes, https://lore.kernel.org/r/CAHk-=wgRm26_oT-JR+TRzDsfhD1TRxfWDM=j6kJerv+m=NU-yQ@mail.gmail.com

This patch solves per-thread profiling issue. However, -e cycles:p is
still root only because IBS hw does not support user/kernel filtering.

Thanks,
Ravi