linux-kernel - Re: [PATCH 1/3] x86/MCE/AMD, EDAC/mce

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Message-ID: <20210525200327.GA8891@aus-x-yghannam.amd.com>
Date:   Tue, 25 May 2021 16:03:27 -0400
From:   Yazen Ghannam <yazen.ghannam@....com>
To:     Borislav Petkov <bp@...en8.de>
Cc:     "Chatradhi, Naveen Krishna" <NaveenKrishna.Chatradhi@....com>,
        "linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
        "x86@...nel.org" <x86@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "mchehab@...nel.org" <mchehab@...nel.org>,
        "M K, Muralidhara" <Muralidhara.MK@....com>
Subject: Re: [PATCH 1/3] x86/MCE/AMD, EDAC/mce_amd: Add new SMCA bank types.

On Tue, May 25, 2021 at 08:02:44PM +0200, Borislav Petkov wrote:
> On Mon, May 24, 2021 at 04:41:25PM +0000, Chatradhi, Naveen Krishna wrote:
> > [naveenk:] There is a possibility for a heterogenous system with both
> > the SMCA_UMC and SMCA_UMC_V2 variant of controllers to exist.
> 
> Wait, what? You can have systems with *both* UMCs in the same coherent
> fabric and thus the OS can see UMCs of both types on the same system?
>

Yep, that's right. The UMCs are the only case of this so far and in the
foreseeable future. Though we may be moving towards more cases like
this.

Thanks,
Yazen