linux-kernel - Re: [PATCH] x86/microcode: Do not select FW

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Message-ID: <20200610102851.GA22584@gondor.apana.org.au>
Date:   Wed, 10 Jun 2020 20:28:51 +1000
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Borislav Petkov <bp@...en8.de>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        "H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>,
        x86-ml <x86@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Luis Chamberlain <mcgrof@...nel.org>,
        Greg KH <gregkh@...uxfoundation.org>
Subject: Re: [PATCH] x86/microcode: Do not select FW_LOADER

On Wed, Jun 10, 2020 at 10:16:09AM +0200, Borislav Petkov wrote:
> On Wed, Jun 10, 2020 at 02:29:11PM +1000, Herbert Xu wrote:
> > The x86 microcode support works just fine without FW_LOADER.  In
> > fact these days most people load them early in boot so FW_LOADER
> > never gets into the picture anyway.
> 
> What's the use case here?

Because MICROCODE is the only thing on my system that pulls it
into the kernel.

> Also, I'm working on removing that homegrown get_builtin_firmware() and
> use the one in the fw loader:
> 
> https://lkml.kernel.org/r/20200408094526.GC24663@zn.tnic

That shouldn't be a problem.  That function can simply move under
another (hidden) Kconfig option that gets selected by both MICROCODE
and FW_LOADER.

Cheers,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt