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Re: [Xen-devel] DOM0_GETPAGEFRAMEINFO for non-dom0 domains

To: Jacob Gorm Hansen <jacobg@xxxxxxx>
Subject: Re: [Xen-devel] DOM0_GETPAGEFRAMEINFO for non-dom0 domains
From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Date: Tue, 16 Aug 2005 16:40:28 +0100
Cc: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
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On 16 Aug 2005, at 16:23, Jacob Gorm Hansen wrote:

with writable page tables it takes a little more work tracking page
types from within a domU. Basically, I need to duplicate Xen's pgd walks
when pinning and unpinning pgds, within the domU, in order to obtain a
consistent map of page types for my own pages.

It seems it would be a lot easier just to allow domUs access to a
DOM0_GETPAGEFRAMEINFO-like hypercall that would extract this info from
Xen. Would you consider merging a patch to do this, and how/where would
you prefer it to be implemented?

Implement it as a new MMUEXT operation and we'll consider it.

 -- Keir

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