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Re: [Xen-devel] Designing the N-level event channel registration interface

To: Wei Liu <Wei.Liu2@xxxxxxxxxx>
From: Ian Campbell <Ian.Campbell@xxxxxxxxxx>
Date: Fri, 11 Jan 2013 12:45:16 +0000
Cc: David Vrabel <david.vrabel@xxxxxxxxxx>, "jbeulich@xxxxxxxx" <jbeulich@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxx>
Delivery-date: Fri, 11 Jan 2013 12:47:13 +0000
List-id: Xen developer discussion <xen-devel.lists.xen.org>

On Fri, 2013-01-11 at 12:34 +0000, Wei Liu wrote:
> Ian suggested I use XEN_GUEST_HANDLE_64 to get 64-bit clean version and
> avoid compat layer.

One issue with this which needs specifically considering is that
XEN_GUEST_HANDLE_64 is currently only available/used by control
interfaces (sysctl & domctl) and not by guest APIs. So the question
becomes whether it is acceptable to change that state of affairs.

Ian.

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References:
- [Xen-devel] Designing the N-level event channel registration interface
  - From: Wei Liu

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