linux-kernel - Re: [RFC 1/2] x86/tsc: add a timer to make sure tsc

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Message-ID: <20210410153853.GE21691@zn.tnic>
Date:   Sat, 10 Apr 2021 17:38:53 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Feng Tang <feng.tang@...el.com>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H . Peter Anvin" <hpa@...or.com>,
        Peter Zijlstra <peterz@...radead.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org, rui.zhang@...el.com,
        andi.kleen@...el.com, dave.hansen@...el.com, len.brown@...el.com
Subject: Re: [RFC 1/2] x86/tsc: add a timer to make sure tsc_adjust is always
 checked

On Sat, Apr 10, 2021 at 10:48:56PM +0800, Feng Tang wrote:
> And the bigger risk is still BIOS's writing to TSC_ADJUST MSR beneath
> kernel.

For that we need to do more persuasive work with hw guys. Needs a *lot*
of perseverance.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette