xen: introduce a Kconfig option to enable the pvcalls frontend

Also add pvcalls-front to the Makefile.

Signed-off-by: Stefano Stabellini <stefano@aporeto.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
CC: boris.ostrovsky@oracle.com
CC: jgross@suse.com
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/xen/Kconfig b/drivers/xen/Kconfig
index 4545561954ee..d8dd54678ab7 100644
--- a/drivers/xen/Kconfig
+++ b/drivers/xen/Kconfig
@@ -196,6 +196,17 @@ config XEN_PCIDEV_BACKEND
 
           If in doubt, say m.
 
+config XEN_PVCALLS_FRONTEND
+        tristate "XEN PV Calls frontend driver"
+        depends on INET && XEN
+        default n
+        select XEN_XENBUS_FRONTEND
+        help
+          Experimental frontend for the Xen PV Calls protocol
+          (https://xenbits.xen.org/docs/unstable/misc/pvcalls.html). It
+          sends a small set of POSIX calls to the backend, which
+          implements them.
+
 config XEN_PVCALLS_BACKEND
         bool "XEN PV Calls backend driver"
         depends on INET && XEN && XEN_BACKEND