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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