linux-kernel - Re: [PATCH 2/2] x86, microcode: Make reload interface per system

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Message-ID: <20120620232632.GE2016@aftab.osrc.amd.com>
Date:	Thu, 21 Jun 2012 01:26:32 +0200
From:	Borislav Petkov <bp@...64.org>
To:	Henrique de Moraes Holschuh <hmh@....eng.br>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Borislav Petkov <bp@...64.org>,
	"Yu, Fenghua" <fenghua.yu@...el.com>, X86-ML <x86@...nel.org>,
	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>,
	Andreas Herrmann <andreas.herrmann3@....com>
Subject: Re: [PATCH 2/2] x86, microcode: Make reload interface per system

On Wed, Jun 20, 2012 at 08:21:17PM -0300, Henrique de Moraes Holschuh wrote:
> > Right, so since we're mucking about with the whole interface anyway,
> > can't we fix this too?
> 
> Please!
> 
> Just make it attempt to load a statically named firmware file first, and
> fall back to the older variable naming.
> 
> If the reason for the weird naming is a size concern, "iucode_tool
> --scan-system -w /lib/firmware/intel-ucode/x86.bin" (or whatever you name
> it) would create a file with just the microcode required by the (online)
> processors in the running system.

But why go to all that trouble? Why not just load the single blob and
let the ucode driver figure out which patch is needed?

The way we do it, btw.

-- 
Regards/Gruss,
Boris.

Advanced Micro Devices GmbH
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