1 files changed, 10 insertions, 0 deletions

diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index cad8346def1d..ce13ad689d19 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -217,6 +217,16 @@ config IA64_SGI_SN_SIM
           If you are compiling a kernel that will run under SGI's IA-64
           simulator (Medusa) then say Y, otherwise say N.
 
+config IA64_SGI_SN_XP
+        tristate "Support communication between SGI SSIs"
+        depends on MSPEC
+        help
+          An SGI machine can be divided into multiple Single System
+          Images which act independently of each other and have
+          hardware based memory protection from the others.  Enabling
+          this feature will allow for direct communication between SSIs
+          based on a network adapter and DMA messaging.
+
 config FORCE_MAX_ZONEORDER
         int
         default "18"