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Re: [Xen-devel] update_va_mapping_otherdomain

To: <mhines@xxxxxxxxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] update_va_mapping_otherdomain
From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Date: Sat, 08 Sep 2007 10:00:10 +0100
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On 8/9/07 02:29, "Michael R. Hines" <mhines@xxxxxxxxxxxxxxxxx> wrote:

> Upon successful return from update_va_mapping (i.e. return code == zero),
> my problem involves the last step mentioned above. The present bit still
> remains unchanged (is still one), although update_va_mapping return true.
> What might cause such a strange problem to occur?

That hypercall allows you to update a *local* va mapping to map *another*
domain's memory page. So you've mapped the guest's page somewhere random in
your own address space.

 -- Keir

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