xen: Limit execution to EL1 only

Xen core_init() is calling HVC which should be called from EL1 level that's
why do Xen initialization only when U-Boot runs in EL1.

Signed-off-by: Michal Simek <michal.simek@amd.com>

diff --git a/drivers/xen/hypervisor.c b/drivers/xen/hypervisor.c
index 16c7c96..0b2311b 100644 (file)
--- a/drivers/xen/hypervisor.c
+++ b/drivers/xen/hypervisor.c
@@ -264,8 +264,15 @@ void clear_evtchn(uint32_t port)
 
 int xen_init(void)
 {
+       int el = current_el();
+
        debug("%s\n", __func__);
 
+       if (el != 1) {
+               puts("XEN:\tnot running from EL1\n");
+               return 0;
+       }
+
        map_shared_info(NULL);
        init_events();
        init_xenbus();