linux-kernel - Re: [PATCH v2] x86/microcode/intel: Extend BDW late-loading with LLC size check

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Message-ID: <20180116213018.gqcvmbwog5kwg63l@agluck-desk>
Date:   Tue, 16 Jan 2018 13:30:19 -0800
From:   "Luck, Tony" <tony.luck@...el.com>
To:     Borislav Petkov <bp@...en8.de>
Cc:     Jia Zhang <zhang.jia@...ux.alibaba.com>,
        "hmh@....eng.br" <hmh@....eng.br>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "hpa@...or.com" <hpa@...or.com>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "x86@...nel.org" <x86@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] x86/microcode/intel: Extend BDW late-loading with LLC
 size check

On Tue, Jan 16, 2018 at 09:50:37PM +0100, Borislav Petkov wrote:
> ... and there's not a more reliable way to detect those like platform ID
> or so? Because if for anywhere, this is where one *should* use platform
> ID.
> 
> Or perhaps some other bit somewhere instead of this cache size thing?

I could get you a list of model numbers that you can check against
model_name.  But that seems way worse. Especially as the 2.5MB thing
is what is called out in the erratum.

-Tony