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

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Date:	Tue, 18 Oct 2011 11:49:37 +0200
From:	Christoph Egger <Christoph.Egger@....com>
To:	Borislav Petkov <bp@...64.org>
CC:	"H. Peter Anvin" <hpa@...or.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>,
	the arch/x86 maintainers <x86@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Xen Devel <xen-devel@...ts.xensource.com>,
	Tigran Aivazian <tigran@...azian.fsnet.co.uk>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [Xen-devel] Re: [PATCH 0/3] x86/microcode: support for microcode
 update in Xen dom0

On 10/18/11 11:35, Borislav Petkov wrote:
> On Tue, Oct 18, 2011 at 04:56:22AM -0400, Christoph Egger wrote:
>> I think this approach is good to get the microcode applied as
>> early as possible at boot time. But on servers you usually do not want
>> to reboot the machine unless you do a BIOS update which will apply
>> the new microcode anyway. So for applying the microcode update
>> at runtime I would like to keep the existing API.
>
> No, you don't want to keep the existing API and you know it. I've
> explained to you last week why.
>

By "existing API" I mean the xen hypercall. Sorry for the confusion.

Christoph


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