linux-kernel - Re: [Xen-devel] Re: [PATCH 3/3] xen/microcode: partially enable even for non-privileged kernels

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Date:	Mon, 15 Nov 2010 17:17:20 -0800
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
CC:	the arch/x86 maintainers <x86@...nel.org>,
	Xen-devel <xen-devel@...ts.xensource.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [Xen-devel] Re: [PATCH 3/3] xen/microcode: partially enable even
 for non-privileged kernels

On 11/15/2010 08:02 AM, Konrad Rzeszutek Wilk wrote:
> On Thu, Nov 11, 2010 at 03:58:06PM -0800, Jeremy Fitzhardinge wrote:
>> From: Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>
>>
>> Don't attempt to load microcode on non-privileged kernels.  Kernels
> The previous patch had this:
>
>  if (!xen_initial_domain())
> +               return NULL;
>
> which pretty much made non-priviliged kernels not do any micro code loading.
>
> It sounds like this patch is just to not compile the Xen microcode code
> if CONFIG_DOM0 is not enabled?

Yeah, I think the patch is a brainfart, and the existing code already
did the right thing.

    J
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