tree c14af462957ce9ee6de3e4537e15879c25a679aa
parent b536b4b9623084d86f2b1f19cb44a2d6d74f00bf
author Jeremy Fitzhardinge <jeremy@xensource.com> 1184722626 -0700
committer Jeremy Fitzhardinge <jeremy@goop.org> 1184773664 -0700

xen: Add grant table support

Add Xen 'grant table' driver which allows granting of access to
selected local memory pages by other virtual machines and,
symmetrically, the mapping of remote memory pages which other virtual
machines have granted access to.

This driver is a prerequisite for many of the Xen virtual device
drivers, which grant the 'device driver domain' restricted and
temporary access to only those memory pages that are currently
involved in I/O operations.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Ian Pratt <ian.pratt@xensource.com>
Signed-off-by: Christian Limpach <Christian.Limpach@cl.cam.ac.uk>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>