From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jeremy Fitzhardinge <jeremy@goop.org>
Subject: Re: Re: pvclock in userland (reprise)
Date: Mon, 21 Sep 2009 11:54:14 -0700
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To: Jan Beulich <JBeulich@novell.com>
Cc: Jun Nakajima <jun.nakajima@intel.com>, Dan Magenheimer <dan.magenheimer@oracle.com>, "Xen-Devel (E-mail)" <xen-devel@lists.xensource.com>, Keir Fraser <keir.fraser@eu.citrix.com>, Donald D Dugger <donald.d.dugger@intel.com>
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On 09/21/09 01:20, Jan Beulich wrote:
>> Does Xen still claim the top part of the 32-bit address space?
>>     
> Sure - currently just for the compat M2P table. I can't see why other
> things could be mapped there (the compat M2P table is at most 128M
> in size, hence there's plenty of virtual space available).
>   

Yep, we could alias the pvclock info there, though I'm coming to like
the idea of doing it via syscall/hypercall rather than having the guest
explicitly get access to shared memory.

    J