From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Jan Beulich" <jbeulich@novell.com>
Subject: Re: [PATCH 1/9] Add cpu idle pwr mgmt to xen
Date: Wed, 30 Apr 2008 11:25:12 +0100
Message-ID: <48186528.76E4.0078.0@novell.com>
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	<C43E01C7.201DC%keir.fraser@eu.citrix.com>
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To: Keir Fraser <keir.fraser@eu.citrix.com>, Kevin Tian <kevin.tian@intel.com>
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>>> Keir Fraser <keir.fraser@eu.citrix.com> 30.04.08 12:00 >>>
>Yes, I don't think we do partial copying anywhere right now. If we did, =
we
>could apply guest_handle_okay() checks explicitly before removing the
>addr-space limitation.

XENMEM_set_memory_map is one example where we do (valid here
because the E820 layout is identical for 32- and 64-bits).

>On the other hand, I don't think we have any hypercall right now where =
4kB
>is likely to be too little space, and where the hypercall cannot be
>sub-divided into smaller chunks by the compat shim.

XENMEM_exchange and GNTTABOP_setup_table are examples for this.

Jan