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

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Date:	Wed, 12 Oct 2011 16:55:00 -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 04:40 PM, Jeremy Fitzhardinge wrote:
> On 10/12/2011 03:49 PM, H. Peter Anvin wrote:
>> The stickiest part of all of this is where to leave the microcode so
>> the kernel can get to it way early.  We could use the linked list, but
>> that would mean bootloader enabling; another idea was to stick it as a
>> prefix to the initramfs identified by a signature.
>
> I think it would be easiest for the multiboot case if it were a separate
> file, but I don't feel I'm really up on all the details.

For the multiboot case, yes of course.

Some bootloaders allow initramfs to be concatenated from multiple files; 
unfortunately I'm not sure if Grub ever grew that capability.  Sigh.

	-hpa


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