[coreboot] Patch set updated for coreboot: 5a369c9 Add Kconfig option to lock/unlock ME firmware during build

Stefan Reinauer (stefan.reinauer@coreboot.org) gerrit at coreboot.org
Mon Nov 12 23:26:19 CET 2012

Stefan Reinauer (stefan.reinauer at coreboot.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/1798


commit 5a369c91ac7b0cf957e23132ccab22437e57a933
Author: Stefan Reinauer <reinauer at chromium.org>
Date:   Wed Oct 31 17:30:13 2012 -0700

    Add Kconfig option to lock/unlock ME firmware during build
    For reasons of security and testing we want to be able to
    enable/disable ME section locking through a config option.
    Change-Id: I341c577cdae86be62c0e3d32bbd6b3333c004a5f
    Signed-off-by: Stefan Reinauer <reinauer at google.com>
 src/southbridge/intel/bd82x6x/Kconfig      | 13 +++++++++++++
 src/southbridge/intel/bd82x6x/Makefile.inc |  9 +++++++++
 2 files changed, 22 insertions(+)

diff --git a/src/southbridge/intel/bd82x6x/Kconfig b/src/southbridge/intel/bd82x6x/Kconfig
index 7634b80..e330fb4 100644
--- a/src/southbridge/intel/bd82x6x/Kconfig
+++ b/src/southbridge/intel/bd82x6x/Kconfig
@@ -58,4 +58,17 @@ config HPET_MIN_TICKS
 	default 0x80
+	bool "Lock Management Engine section"
+	default n
+	help
+	  The Intel Management Engine supports preventing write accesses
+	  from the host to the Management Engine section in the firmware
+	  descriptor. If the ME section is locked, it can only be overwritten
+	  with an external SPI flash programmer. You will want this if you
+	  want to increase security of your ROM image once you are sure
+	  that the ME firmware is no longer going to change.
+	  If unsure, say N.
diff --git a/src/southbridge/intel/bd82x6x/Makefile.inc b/src/southbridge/intel/bd82x6x/Makefile.inc
index eca3d9e..7fd6ca8 100644
--- a/src/southbridge/intel/bd82x6x/Makefile.inc
+++ b/src/southbridge/intel/bd82x6x/Makefile.inc
@@ -60,5 +60,14 @@ bd82x6x_add_me: $(obj)/coreboot.pre $(IFDTOOL)
 		-i ME:3rdparty/mainboard/$(MAINBOARDDIR)/me.bin \
 	mv $(obj)/coreboot.pre.new $(obj)/coreboot.pre
+	printf "    IFDTOOL    Locking Management Engine\n"
+	$(objutil)/ifdtool/ifdtool -l $(obj)/coreboot.pre
+	mv $(obj)/coreboot.pre.new $(obj)/coreboot.pre
+	printf "    IFDTOOL    Unlocking Management Engine\n"
+	$(objutil)/ifdtool/ifdtool -u $(obj)/coreboot.pre
+	mv $(obj)/coreboot.pre.new $(obj)/coreboot.pre
 PHONY += bd82x6x_add_me

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