Re: [Xen-devel] Given a mfn, how to tell whether it is a guest p

To:	Tim Deegan <Tim.Deegan@xxxxxxxxxx>
Subject:	Re: [Xen-devel] Given a mfn, how to tell whether it is a guest page or not?
From:	ZelluX <zellux@xxxxxxxxx>
Date:	Thu, 30 Jul 2009 22:17:48 +0800
Cc:	"xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
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I'm reading arch/x86/mm/shadow/multi.c and it seems shadow_page_info struct is used here, which doesn't contain a _domain field. Is there any relation between shadow_page_info and page_info? Are page_info just place holder for shadow_page_info struct here?

On Thu, Jul 30, 2009 at 10:03 PM, Tim Deegan <Tim.Deegan@xxxxxxxxxx> wrote:

At 08:24 +0100 on 30 Jul (1248942251), ZelluX wrote:
> In shadow mode, how can I know if a mfn is related to a guest page? Is there any mfn range to tell xen pages from guest pages?

In any mode, look at the owner field of the page_info struct.

Cheers,

Tim.

--
Tim Deegan <Tim.Deegan@xxxxxxxxxx>
Principal Software Engineer, Citrix Systems (R&D) Ltd.
[Company #02300071, SL9 0DZ, UK.]

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Re: [Xen-devel] Given a mfn, how to tell whether it is a guest page or