From 8bfa4685df73cbc91489916260214dea3109089d Mon Sep 17 00:00:00 2001
From: Bill Richardson <wfrichar@chromium.org>
Date: Fri, 23 Jul 2010 17:24:15 -0700
Subject: [PATCH] Add "kern_guid=%U" to the secure boot kernel command-line
 template.

With the newest Chrome OS BIOS and bootstub, this will be expanded to the
booted kernel partition's UniqueGuid, so that the kernel device can be
determined with certainty, since the BIOS and kernel may enumerate drives
differently.

You can identify the booted kernel partition at runtime with something like
this:

  sudo cgpt find -1 -u \
    $(cat /proc/cmdline | sed 's/.*kern_guid=\([0-9a-f-]\+\).*/\1/')

Review URL: http://codereview.chromium.org/3035020
---
 build_kernel_image.sh | 1 +
 1 file changed, 1 insertion(+)

diff --git a/build_kernel_image.sh b/build_kernel_image.sh
index fe90297a52..03b9558820 100755
--- a/build_kernel_image.sh
+++ b/build_kernel_image.sh
@@ -128,6 +128,7 @@ noswap
 i915.modeset=1
 loglevel=7
 cros_secure
+kern_guid=%U
 EOF
   WORK="${WORK} ${FLAGS_working_dir}/config.txt"