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

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Message-ID: <7ce3ea01-9758-0a97-e810-2bf38e7d59a7@ispras.ru>
Date:   Wed, 1 Mar 2023 00:16:43 +0300 (MSK)
From:   Alexander Monakov <amonakov@...ras.ru>
To:     Borislav Petkov <bp@...en8.de>
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, 28 Feb 2023, Borislav Petkov wrote:

> 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
> 
> ?

No, with this option it is not reproducible.

Alexander