linux-kernel - Re: [PATCH] x86/MCE/AMD, EDAC/mce_amd: Remove struct smca_hwid.xec

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Message-ID: <20200817151821.GA1095089@yaz-nikka.amd.com>
Date:   Mon, 17 Aug 2020 10:18:21 -0500
From:   Yazen Ghannam <yazen.ghannam@....com>
To:     Borislav Petkov <bp@...en8.de>
Cc:     linux-edac@...r.kernel.org, linux-kernel@...r.kernel.org,
        tony.luck@...el.com, x86@...nel.org
Subject: Re: [PATCH] x86/MCE/AMD, EDAC/mce_amd: Remove struct
 smca_hwid.xec_bitmap

On Mon, Aug 17, 2020 at 11:40:07AM +0200, Borislav Petkov wrote:
> On Mon, Jul 20, 2020 at 02:53:53PM +0000, Yazen Ghannam wrote:
> > From: Yazen Ghannam <yazen.ghannam@....com>
> > 
> > The Extended Error Code Bitmap (xec_bitmap) for a Scalable MCA bank type
> > was intended to be used by the kernel to filter out invalid error codes
> > on a system. However, this is unnecessary because the hardware will only
> > report valid error codes.
> 
> That's a kinda bold statement. :)
> 

Yeah, I'm trying to keep "may" out of my vocabulary. :)

> Are you saying, you wanna trust verification and that check is totally
> useless?
> 

I do. This check was added because I wasn't sure what to expect with
this new architecural extension. But after a few product releases, it
has been unnecessary. And I don't see a need for it with future systems.

Thanks,
Yazen