xen-gntalloc: Userspace grant allocation driver

This allows a userspace application to allocate a shared page for
implementing inter-domain communication or device drivers. These
shared pages can be mapped using the gntdev device or by the kernel
in another domain.

Signed-off-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/xen/Kconfig b/drivers/xen/Kconfig
index 07bec09d1dad..a3d7afb86ae4 100644
--- a/drivers/xen/Kconfig
+++ b/drivers/xen/Kconfig
@@ -80,6 +80,14 @@ config XEN_GNTDEV
         help
           Allows userspace processes to use grants.
 
+config XEN_GRANT_DEV_ALLOC
+        tristate "User-space grant reference allocator driver"
+        depends on XEN
+        help
+          Allows userspace processes to create pages with access granted
+          to other domains. This can be used to implement frontend drivers
+          or as part of an inter-domain shared memory channel.
+
 config XEN_PLATFORM_PCI
         tristate "xen platform pci device driver"
         depends on XEN_PVHVM && PCI