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xen: Add grant table support

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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>
This commit is contained in:
Jeremy Fitzhardinge
2007-07-17 18:37:06 -07:00
committed by Jeremy Fitzhardinge
parent b536b4b962
commit ad9a86121f
5 changed files with 776 additions and 10 deletions
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drivers/Makefile
+2
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@@ -15,6 +15,8 @@ obj-$(CONFIG_ACPI) += acpi/
obj-$(CONFIG_PNP) += pnp/
obj-$(CONFIG_ARM_AMBA) += amba/
obj-$(CONFIG_XEN) += xen/
# char/ comes before serial/ etc so that the VT console is the boot-time
# default.
obj-y += char/