xen: introduce a Kconfig option to enable the pvcalls backend

Also add pvcalls-back to the Makefile.

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

diff --git a/drivers/xen/Kconfig b/drivers/xen/Kconfig
index f15bb3b789d52dd2024d3efa3f48aafc643ef3ae..4545561954ee4fad756cdf38dd55778f91041fe0 100644 (file)
--- a/drivers/xen/Kconfig
+++ b/drivers/xen/Kconfig
@@ -196,6 +196,18 @@ config XEN_PCIDEV_BACKEND
 
          If in doubt, say m.
 
+config XEN_PVCALLS_BACKEND
+       bool "XEN PV Calls backend driver"
+       depends on INET && XEN && XEN_BACKEND
+       default n
+       help
+         Experimental backend for the Xen PV Calls protocol
+         (https://xenbits.xen.org/docs/unstable/misc/pvcalls.html). It
+         allows PV Calls frontends to send POSIX calls to the backend,
+         which implements them.
+
+         If in doubt, say n.
+
 config XEN_SCSI_BACKEND
        tristate "XEN SCSI backend driver"
        depends on XEN && XEN_BACKEND && TARGET_CORE

diff --git a/drivers/xen/Makefile b/drivers/xen/Makefile
index 8feab810aed9222b97bd5959b42e6f09ffaaf83d..480b92887e57403021cadf95dad6bb18850f7af5 100644 (file)
--- a/drivers/xen/Makefile
+++ b/drivers/xen/Makefile
@@ -38,6 +38,7 @@ obj-$(CONFIG_XEN_ACPI_PROCESSOR)      += xen-acpi-processor.o
 obj-$(CONFIG_XEN_EFI)                  += efi.o
 obj-$(CONFIG_XEN_SCSI_BACKEND)         += xen-scsiback.o
 obj-$(CONFIG_XEN_AUTO_XLATE)           += xlate_mmu.o
+obj-$(CONFIG_XEN_PVCALLS_BACKEND)      += pvcalls-back.o
 xen-evtchn-y                           := evtchn.o
 xen-gntdev-y                           := gntdev.o
 xen-gntalloc-y                         := gntalloc.o