xen: Introduce shared buffer helpers for page directory...
authorOleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Fri, 30 Nov 2018 07:42:03 +0000 (09:42 +0200)
committerBoris Ostrovsky <boris.ostrovsky@oracle.com>
Tue, 18 Dec 2018 17:15:55 +0000 (12:15 -0500)
commitb3383974fee272ad0d444a2d083f456879447cd8
tree22047f4cb44f44491497fb9e29ce6d812221652e
parent1669907e3d1abfa3f7586e2d55dbbc117b5adba2
xen: Introduce shared buffer helpers for page directory...

based frontends. Currently the frontends which implement
similar code for sharing big buffers between frontend and
backend are para-virtualized DRM and sound drivers.
Both define the same way to share grant references of a
data buffer with the corresponding backend with little
differences.

Move shared code into a helper module, so there is a single
implementation of the same functionality for all.

This patch introduces code which is used by sound and display
frontend drivers without functional changes with the intention
to remove shared code from the corresponding drivers.

Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Acked-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
drivers/xen/Kconfig
drivers/xen/Makefile
drivers/xen/xen-front-pgdir-shbuf.c [new file with mode: 0644]
include/xen/xen-front-pgdir-shbuf.h [new file with mode: 0644]