linux-kernel - Re: [PATCH] perf/x86/amd: Run AMD BRS code only on supported hw

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Message-ID: <YoNg858+JkwAZvQw@zn.tnic>
Date:   Tue, 17 May 2022 10:46:43 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Stephane Eranian <eranian@...gle.com>
Cc:     Peter Zijlstra <peterz@...radead.org>, X86 ML <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] perf/x86/amd: Run AMD BRS code only on supported hw

On Mon, May 16, 2022 at 05:59:27PM -0700, Stephane Eranian wrote:
> Thanks for catching this. I tested on Zen2 (Fam17h) and it did not
> trigger the problem

That's because Zen2 has this MSR - 0xc000010f - so the write succeeds.

-- 
Regards/Gruss,
    Boris.

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