linux-kernel - RE: [PATCH 2/2] EDAC/ghes: Modularize ghes_edac driver to remove the dependency on ghes

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Message-ID: <PH7PR84MB1838B5AE91C939D3C9D872A2826A9@PH7PR84MB1838.NAMPRD84.PROD.OUTLOOK.COM>
Date:   Wed, 17 Aug 2022 21:09:41 +0000
From:   "Kani, Toshi" <toshi.kani@....com>
To:     Borislav Petkov <bp@...en8.de>
CC:     Justin He <Justin.He@....com>, Ard Biesheuvel <ardb@...nel.org>,
        Len Brown <lenb@...nel.org>, James Morse <James.Morse@....com>,
        Tony Luck <tony.luck@...el.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        "Robert Richter" <rric@...nel.org>,
        Robert Moore <robert.moore@...el.com>,
        "linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
        "devel@...ica.org" <devel@...ica.org>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Shuai Xue <xueshuai@...ux.alibaba.com>,
        Jarkko Sakkinen <jarkko@...nel.org>,
        "linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>,
        nd <nd@....com>, "stable@...nel.org" <stable@...nel.org>
Subject: RE: [PATCH 2/2] EDAC/ghes: Modularize ghes_edac driver to remove the
 dependency on ghes

On Wednesday, August 17, 2022 2:56 PM, Borislav Petkov wrote:
> On Wed, Aug 17, 2022 at 08:22:58PM +0000, Kani, Toshi wrote:
> > ghes_edac is used on Arm. This original issue happened on a non-HPE
> > platform.
> 
> Remember: ghes_edac loads only on known-good platforms - not the other
> way around. If ARM folks wanna use it there, then I'd expect explicit
> enablement to do so.

Well, that was the case originally, which is why 301375e76432 was made
for x86 chipset-specific edac drivers only at that time.

Since then, the change below enabled ghes_edac on Arm without this
known-good platforms check.

commit eaa3a1d46 ("EDAC, ghes: Make platform-based whitelisting x86-only")

Toshi