WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

[Xen-devel] Re: [PATCH 0/2] x86/microcode: support for microcode update

To: Borislav Petkov <bp@xxxxxxxxx>, Jeremy Fitzhardinge <jeremy@xxxxxxxx>, Ingo Molnar <mingo@xxxxxxx>, the arch/x86 maintainers <x86@xxxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, Xen Devel <Xen-devel@xxxxxxxxxxxxxxxxxxx>, Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
Subject: [Xen-devel] Re: [PATCH 0/2] x86/microcode: support for microcode update in Xen dom0
From: "H. Peter Anvin" <hpa@xxxxxxxxx>
Date: Thu, 03 Feb 2011 10:33:14 -0800
Cc:
Delivery-date: Thu, 03 Feb 2011 10:34:39 -0800
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <20110203182550.GB21488@xxxxxxx>
List-help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
List-post: <mailto:xen-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
References: <4D461FB9.5050807@xxxxxxxx> <20110131070241.GA22071@xxxxxxxxxxxx> <4D46FC9F.6090309@xxxxxxxx> <20110131234131.GA16095@xxxxxxxxxxxx> <4D475099.1080004@xxxxxxxx> <4D475DB5.1020300@xxxxxxxxx> <4D488EB1.9020803@xxxxxxxx> <4D49B5F6.5010606@xxxxxxxxx> <20110202205704.GA14752@xxxxxxxxxxxx> <4D49D0E6.30102@xxxxxxxxx> <20110203182550.GB21488@xxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.13) Gecko/20101209 Fedora/3.1.7-0.35.b3pre.fc14 Thunderbird/3.1.7
On 02/03/2011 10:25 AM, Borislav Petkov wrote:
>>
>> We already have a mechanism for passing arbitrary blobs -- the linked
>> list -- so we don't have to add a new field at all.
> 
> So, after staring at grub legacy sources a bit, we could load the
> microcode image using the grub module's mechanism:
> 
> kernel /...
> module /boot/microcode.gz type=SETUP_MICROCODE # this is looked at by 
> parse_setup_data()
> 
> and let grub write the pointer into setup_data passed through the kernel
> header.
> 
> This would mean that we need to add support to a bunch of boot loaders
> used currently, no? Or is there an even better way?
> 

We would need to add boot loader support, yes.

        -hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel