Message-ID: <4D488EB1.9020803@goop.org>
Date: Tue, 01 Feb 2011 14:52:33 -0800
From: Jeremy Fitzhardinge <jeremy@goop.org>
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To: "H. Peter Anvin" <hpa@zytor.com>
CC: Borislav Petkov <bp@alien8.de>, Ingo Molnar <mingo@elte.hu>,
        the arch/x86 maintainers <x86@kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Xen Devel <Xen-devel@lists.xensource.com>,
        Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Subject: Re: [PATCH 0/2] x86/microcode: support for microcode update in Xen
 dom0
References: <cover.1296259339.git.jeremy.fitzhardinge@citrix.com> <20110130113356.GA27967@liondog.tnic> <4D461FB9.5050807@goop.org> <20110131070241.GA22071@liondog.tnic> <4D46FC9F.6090309@goop.org> <20110131234131.GA16095@liondog.tnic> <4D475099.1080004@goop.org> <4D475DB5.1020300@zytor.com>
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On 01/31/2011 05:11 PM, H. Peter Anvin wrote:
> Note: Xen may not have devices, but it is already using multiboot to
> load multiple modules.  It could load the microcode blob that way.
>
> That would enable an earlier loading of microcode, which is a very
> good thing.

Yes, that is a thought, but it would require some distro support to make
sure the firmware is copied into /boot, and grub updated appropriately.

The principle advantage of updating the microcode driver is that it Just
Works regardless of whether the system is booting native or Xen.

    J
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