linux-kernel - Re: [PATCH v2 8/8] x86/MCE/AMD Support new memory interleaving modes during address translation

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Message-ID: <20200928094759.GF1685@zn.tnic>
Date:   Mon, 28 Sep 2020 11:47:59 +0200
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,
        Smita.KoralahalliChannabasappa@....com
Subject: Re: [PATCH v2 8/8] x86/MCE/AMD Support new memory interleaving modes
 during address translation

On Fri, Sep 25, 2020 at 02:51:27PM -0500, Yazen Ghannam wrote:
> We can add support to get the physical address from firmware in some
> cases. But it looks to me that we'll still need to keep updating the
> translation code in the kernel to cover some platform/user
> configurations.

Unfortunately, that is correct. :-\

> The address translation needs to be done before the notfiers that need
> it, and EDAC comes after all of them. There's also the case where the
> EDAC interface isn't wanted, so amd64_edac will be unloaded.

I'd be interested as to why. Because decoding addresses is amd64_edac
*core* functionality. We can stick it in drivers/edac/mce_amd.c but I'd
like to hear what those valid reasons are, not to use the driver which
is supposed to do that anyway.

Thanks for explaining - it is all clear now.

-- 
Regards/Gruss,
    Boris.

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