linux-kernel - Re: [PATCH 0/3] x86/microcode: support for microcode update in Xen dom0

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Date:	Wed, 12 Oct 2011 17:03:50 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
CC:	Borislav Petkov <bp@...64.org>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	the arch/x86 maintainers <x86@...nel.org>,
	Tigran Aivazian <tigran@...azian.fsnet.co.uk>,
	Xen Devel <xen-devel@...ts.xensource.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH 0/3] x86/microcode: support for microcode update in Xen
 dom0

On 10/12/2011 05:00 PM, Jeremy Fitzhardinge wrote:
>
> Presumably we'd want some way to make all possible microcode files
> available to the hypervisor/kernel so that there's no need to construct
> the bootloader config for a specific CPU vendor (or worse, CPU model).
> So that would need either some way of specifying multiple files, or a
> wrapper which can contain multiple files?
>

I have been thinking a "bundle" format with a per-vendor header followed 
by the microcode in the appropriate format for each vendor.

	-hpa


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