Add root parameter configuration in boot command line.

It is helpful when secure boot is enabled, because you can not
modify boot command line after boot-menu.inc is signed before deploying.

Signed-off-by: Jinliang Li <jinliang.li@linux.alibaba.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/README b/README
index 37be4fe..8c0ebff 100644
--- a/README
+++ b/README
@@ -92,6 +92,10 @@ DEBUG_FLAGS_forcevariable = ""
 IMAGE_INSTALL += "kernel-image-bzimage"
 USER_CLASSES_remove = "image-prelink"
 
+# Uncomment this line to modify the root parameter in boot command line if the default one
+# is not working for you. It is helpful when secure boot is enabled.
+#BOOT_CMD_ROOT = "/dev/hda2"
+
 III. Build meta-secure-core
 ===========================