[IA64] fixes configs and add default config for ia64 xen domU

This patch fixes xen related Kconfigs and add default config
file for ia64 xen domU.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Tony Luck <aegl@agluck-desktop.(none)>

1 files changed, 4 insertions, 0 deletions

diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 20d6d28ca735..4eb45c012498 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -221,7 +221,11 @@ config IA64_HP_SIM
 
 config IA64_XEN_GUEST
         bool "Xen guest"
+        select SWIOTLB
         depends on XEN
+        help
+          Build a kernel that runs on Xen guest domain. At this moment only
+          16KB page size in supported.
 
 endchoice