[PATCH 1/3] arm64: add grub_xen_boot env to indicate that we have xen_* commands

[fu.wei@linaro.org]

From: Fu Wei <fu.wei@linaro.org>

Signed-off-by: Fu Wei <fu.wei@linaro.org>
---
 grub-core/loader/arm64/xen_boot.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/grub-core/loader/arm64/xen_boot.c b/grub-core/loader/arm64/xen_boot.c
index 8ae43d7..ef03111 100644
--- a/grub-core/loader/arm64/xen_boot.c
+++ b/grub-core/loader/arm64/xen_boot.c
@@ -20,6 +20,7 @@
 #include <grub/charset.h>
 #include <grub/command.h>
 #include <grub/err.h>
+#include <grub/env.h>
 #include <grub/file.h>
 #include <grub/fdt.h>
 #include <grub/list.h>
@@ -490,10 +491,17 @@ GRUB_MOD_INIT (xen_boot)
     grub_register_command ("xen_module", grub_cmd_xen_module, 0,
 			   N_("Load a xen module."));
   my_mod = mod;
+
+/* setup a env to indicate that
+ * we have xen_* commands.
+ */
+  grub_env_set ("grub_xen_boot", "y");
+  grub_env_export ("grub_xen_boot");
 }
 
 GRUB_MOD_FINI (xen_boot)
 {
   grub_unregister_command (cmd_xen_hypervisor);
   grub_unregister_command (cmd_xen_module);
+  grub_env_unset ("grub_xen_boot");
 }
-- 
2.5.0