linux-kernel - Re: [PATCH 03/20] x86/mce: Use mce_setup() helpers for apei_smca_report_x86

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Message-ID: <20231122182805.GIZV5INdVuBOhbtjOm@fat_crate.local>
Date:   Wed, 22 Nov 2023 19:28:05 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Yazen Ghannam <yazen.ghannam@....com>
Cc:     linux-edac@...r.kernel.org, linux-kernel@...r.kernel.org,
        tony.luck@...el.com, x86@...nel.org, Avadhut.Naik@....com,
        Smita.KoralahalliChannabasappa@....com,
        amd-gfx@...ts.freedesktop.org, linux-trace-kernel@...r.kernel.org
Subject: Re: [PATCH 03/20] x86/mce: Use mce_setup() helpers for
 apei_smca_report_x86_error()

On Sat, Nov 18, 2023 at 01:32:31PM -0600, Yazen Ghannam wrote:
> Current AMD systems may report MCA errors using the ACPI Boot Error
> Record Table (BERT). The BERT entries for MCA errors will be an x86
> Common Platform Error Record (CPER) with an MSR register context that
> matches the MCAX/SMCA register space.
> 
> However, the BERT will not necessarily be processed on the CPU that
> reported the MCA errors. Therefore, the correct CPU number needs to be
> determined and the information saved in struct mce.
> 
> The CPU number is determined by searching all possible CPUs for a Local
> APIC ID matching the value in the x86 CPER.

Those below are explaining what the patch does. Not needed here.

> Set up the MCA record after searching for a CPU number. If no possible
> CPU was found, then return early.
> 
> Gather the global MCA information first, save the found CPU number, then
> gather the per-CPU information.

-- 
Regards/Gruss,
    Boris.

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