From mboxrd@z Thu Jan  1 00:00:00 1970
From: Wei Liu <wei.liu2@citrix.com>
Subject: Implement 3-level event channels in Xen.
Date: Mon, 31 Dec 2012 18:22:32 +0000
Message-ID: <1356978155-18293-1-git-send-email-wei.liu2@citrix.com>
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This patch series implements 3-level event channel routines in Xen.

The implementation is as followed:
  * Add a field evtchn_level in struct domain.
  * Add pointers in struct domain to point to 3-level shared array.
  * Add 2nd level selector in struct vcpu.
  * Add a new op in do_event_channel_op to register n-level evtchn.

The exposed interface for registering is extendable, however only 3-level is
supported at the moment.

The routines for 3-level evtchns are more or less the same as 2-level ones.