linux-kernel - Re: [PATCH v5] x86/mce: Check for writes ignored in MCA

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Message-ID: <YrcJKOUSJsmodo70@zn.tnic>
Date:   Sat, 25 Jun 2022 15:10:00 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Smita Koralahalli <Smita.KoralahalliChannabasappa@....com>
Cc:     x86@...nel.org, linux-edac@...r.kernel.org,
        linux-kernel@...r.kernel.org, Tony Luck <tony.luck@...el.com>,
        "H . Peter Anvin" <hpa@...or.com>,
        Yazen Ghannam <yazen.ghannam@....com>
Subject: Re: [PATCH v5] x86/mce: Check for writes ignored in MCA_STATUS
 register

On Fri, Jun 24, 2022 at 03:34:42PM -0700, Smita Koralahalli wrote:
> The wrmsrl_safe() doesn't throw an error here.
> I think we need to read back the written value and check for it whatsoever.
> What do you think?

Ah, that's the write-ignored thing. Not the #GP-generating thing when
McStatusWrEn=0.

Sorry, I got confused.

Can you pls change that part back to reading the previously written
value and send me a tested version?

Thx.

-- 
Regards/Gruss,
    Boris.

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