linux-kernel - Re: x86: AMD Zen2 ymm registers rolling back

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Message-ID: <Y/5qbJgwHhkrMQqr@zn.tnic>
Date:   Tue, 28 Feb 2023 21:56:12 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Alexander Monakov <amonakov@...ras.ru>
Cc:     Andrew Cooper <andrew.cooper3@...rix.com>,
        Tavis Ormandy <taviso@...il.com>, linux-kernel@...r.kernel.org,
        x86@...nel.org
Subject: Re: x86: AMD Zen2 ymm registers rolling back

On Tue, Feb 28, 2023 at 10:29:23PM +0300, Alexander Monakov wrote:
> That I can reproduce the bug even with the latest BIOS,

Can you reproduce if you boot with

clearcpuid=xsaves

?

CONFIG_X86_FEATURE_NAMES must be enabled in your .config for that to
work.

Otherwise, try

clearcpuid=323

Thx.

-- 
Regards/Gruss,
    Boris.

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