From: Christoph Egger <Christoph.Egger@amd.com>
Subject: Re: [Xen-devel] Re: [PATCH 0/3] x86/microcode: support for microcode
 update in Xen dom0
Date: Tue, 18 Oct 2011 11:49:37 +0200
Message-ID: <4E9D4BB1.6070207@amd.com>
References: <20111012101615.GA14966@aftab> <4E95D9E7.6090304@zytor.com> <4E95E7FE.6050302@goop.org> <20111012194543.GD14966@aftab> <20111012204048.GA22260@phenom.oracle.com> <4E960746.90805@zytor.com> <20111012214013.GD28723@aftab> <4E9D3F36.6070201@amd.com> <20111018093534.GA17076@aftab>
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To: Borislav Petkov <bp@amd64.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>, Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>, Jeremy Fitzhardinge <jeremy@goop.org>, Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>, the arch/x86 maintainers <x86@kernel.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Xen Devel <xen-devel@lists.xensource.com>, Tigran Aivazian <tigran@aivazian.fsnet.co.uk>, Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>
List-Id: xen-devel@lists.xenproject.org

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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