linux-kernel - Re: [Xen-devel] [PATCH 12/13] xen: if p2m list located in to be remapped region delay remapping

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Message-ID: <54EC21D7.5010900@suse.com>
Date:	Tue, 24 Feb 2015 08:01:43 +0100
From:	Juergen Gross <jgross@...e.com>
To:	David Vrabel <dvrabel@...tab.net>, linux-kernel@...r.kernel.org,
	xen-devel@...ts.xensource.com, konrad.wilk@...cle.com,
	david.vrabel@...rix.com, boris.ostrovsky@...cle.com
Subject: Re: [Xen-devel] [PATCH 12/13] xen: if p2m list located in to be remapped
 region delay remapping

On 02/19/2015 06:44 PM, David Vrabel wrote:
> On 18/02/2015 06:52, Juergen Gross wrote:
>> With adapting the memory layout of dom0 to that of the host care must
>> be taken not to remap the initial p2m list supported by the hypervisor.
>
> "...supplied by the hypervisor" ?

Yes, of course.

>
>> If the p2m map is detected to be in a region which is going to be
>> remapped, delay the remapping of that area. Not doing so can either
>> crash the system very early, or lead to clobbered data as the target
>> memory area of the remap operation will no longer be reserved.
>
> Would it be better to relocate the p2m before remapping memory?  If not,
> explain why in the commit message.

Okay, will do.


Juergen
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