x86: Dynamically allocate percpu data area when a CPU comes online.

At the same time, the data area starts life zeroed.

Signed-off-by: Keir Fraser <keir.fraser@citrix.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/xen/arch/x86/Makefile b/xen/arch/x86/Makefile
index ba5da39e4b..9aeb1cebb7 100644
--- a/xen/arch/x86/Makefile
+++ b/xen/arch/x86/Makefile
@@ -36,6 +36,7 @@ obj-y += mpparse.o
 obj-y += nmi.o
 obj-y += numa.o
 obj-y += pci.o
+obj-y += percpu.o
 obj-y += physdev.o
 obj-y += setup.o
 obj-y += shutdown.o