linux-kernel - Re: [PATCH 3/3] ghes_edac: add platform check to enable ghes

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Date:   Wed, 19 Jul 2017 20:13:41 +0000
From:   "Kani, Toshimitsu" <toshi.kani@....com>
To:     "aris@...hat.com" <aris@...hat.com>, "bp@...en8.de" <bp@...en8.de>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "mchehab@...nel.org" <mchehab@...nel.org>,
        "rjw@...ysocki.net" <rjw@...ysocki.net>,
        "srinivas.pandruvada@...ux.intel.com" 
        <srinivas.pandruvada@...ux.intel.com>,
        "tony.luck@...el.com" <tony.luck@...el.com>,
        "lenb@...nel.org" <lenb@...nel.org>,
        "linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
        "linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>
Subject: Re: [PATCH 3/3] ghes_edac: add platform check to enable ghes_edac

On Wed, 2017-07-19 at 14:55 -0400, Aristeu Rozanski wrote:
> On Wed, Jul 19, 2017 at 06:22:04PM +0200, Borislav Petkov wrote:
> > On Wed, Jul 19, 2017 at 04:10:07PM +0000, Kani, Toshimitsu wrote:
> > > I do prefer to avoid any white / black listing.  But I do not see
> > > how
> > > it solves the buggy DMI/SMBIOS info as an example of firmware
> > > bugs we
> > > may have to deal with.
> > 
> > So how do you want to deal with this?
> > 
> > Maintain an evergrowing whitelist of platforms which are OK and
> > then the moment a new platform comes along, you send a patch to add
> > it to that whitelist?
> 
> That would also need to keep an eye on versions. A newer version of
> BIOS on a whitelisted platform might be broken.

Right.  I think a question comes to who broke a running system -- OS
update or BIOS update.  This whitelist attempts to protect the former
case by not introducing ghes_edac on arbitrary platforms.  The latter
case should be vendor's responsibility.

Thanks,
-Toshi