linux-kernel - Re: [PATCH] EDAC/mce_amd: Reduce unnecessary spew in dmesg if SMCA feature bit is not exposed

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Date:   Tue, 15 Jun 2021 17:18:50 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Yazen Ghannam <yazen.ghannam@....com>
Cc:     "Luck, Tony" <tony.luck@...el.com>,
        Smita Koralahalli <Smita.KoralahalliChannabasappa@....com>,
        "x86@...nel.org" <x86@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        James Morse <james.morse@....com>,
        Robert Richter <rric@...nel.org>
Subject: Re: [PATCH] EDAC/mce_amd: Reduce unnecessary spew in dmesg if SMCA
 feature bit is not exposed

On Tue, Jun 15, 2021 at 11:08:46AM -0400, Yazen Ghannam wrote:
> How about adding the the SMCA feature to the amd64_cpuids[] table in
> amd64_edac.c?
> 
> We can use X86_MATCH_VENDOR_FEATURE to match on AMD (and Hygon) systems
> with SMCA. And we can remove the X86_MATCH_VENDOR_FAM entries for
> families 17h-19h.

Sure. That'll alleviate the need to add new families which support SMCA
too.

> I'm assuming the issue is that amd64_edac_mod is autoloading due to the
> family-based device table, and this will load edac_mce_amd as a
> dependency.

Is it?

We have

early_initcall(mce_amd_init);

in mce_amd.c which attempts to load this thing unconditionally.

-- 
Regards/Gruss,
    Boris.

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