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Re: [Xen-devel] Re: [PATCH 0/3] x86/microcode: support for microcode upd

To: Christoph Egger <Christoph.Egger@xxxxxxx>
Subject: Re: [Xen-devel] Re: [PATCH 0/3] x86/microcode: support for microcode update in Xen dom0
From: Borislav Petkov <bp@xxxxxxxxx>
Date: Tue, 18 Oct 2011 11:35:34 +0200
Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>, Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, the arch/x86 maintainers <x86@xxxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, Xen Devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Tigran Aivazian <tigran@xxxxxxxxxxxxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, Ingo Molnar <mingo@xxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>
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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.

-- 
Regards/Gruss,
Boris.

Operating Systems Research Center
Advanced Micro Devices, Inc.

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