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Re: [Xen-devel] access vmm from dom0

To: Michael Le <mvle@xxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] access vmm from dom0
From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Date: Thu, 21 Sep 2006 19:42:28 +0100
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On 20/9/06 00:11, "Michael Le" <mvle@xxxxxxxxxxx> wrote:

> Is there an escape mechanism that would allow a guest kernel in dom0 to
> directly access the memory space of the VMM without having to go through
> the hypercalls? I want to be able to mess with physical pages from within
> dom0 and perhaps with some vmm data structures from outside of the vmm.
> I know this breaks strict layering and isolation properties but it would
> be useful for a tool i'm trying to build.

You can call share_xen_page_with_guest() from within Xen to share specific
pages of memory with a particular guest.

 -- Keir

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