New patch to review for coreboot: b8a86cd vboot: add and rejuggle Kconfig options

[Aaron Durbin]

Aaron Durbin ([e-mail]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/10024

-gerrit

commit b8a86cd42545491ae2ffa890593e774d489c42cd
Author: Aaron Durbin 
Date:   Tue Apr 28 16:17:25 2015 -0500

vboot: add and rejuggle Kconfig options

The ChromeOS machines employing vboot verfication require
    different combinations of support:

1. When vboot verification starts.
    2. Is the vboot code a separate stage or program?
    3. If a separate stage, does the that vboot program (verstage) return
       to the stage that loaded the verstage?

For the above, #1 is dependent on when to load/run vboot logic which
    is orthogonal to #2. However, #3 is dependent on #2. The logic
    to act on the combinations follows in subsequent patches.

Change-Id: I39ef7a7c2858e7de43aa99c38121e85a57f1f2f6
    Signed-off-by: Aaron Durbin 
---
 src/soc/marvell/bg4cd/Kconfig                      |  2 +-
 src/vendorcode/google/chromeos/vboot2/Kconfig      | 37 ++++++++++++++--------
 src/vendorcode/google/chromeos/vboot2/Makefile.inc |  4 +++
 3 files changed, 28 insertions(+), 15 deletions(-)

diff --git a/src/soc/marvell/bg4cd/Kconfig b/src/soc/marvell/bg4cd/Kconfig
index 96fd8ef..9c0dc14 100644
--- a/src/soc/marvell/bg4cd/Kconfig
+++ b/src/soc/marvell/bg4cd/Kconfig
@@ -32,7 +32,7 @@ config SOC_MARVELL_BG4CD
    select GENERIC_UDELAY
    select HAVE_MONOTONIC_TIMER
    select GENERIC_GPIO_LIB
-	select VERSTAGE_IN_BOOTBLOCK
+	select VBOOT_STARTS_IN_BOOTBLOCK

if SOC_MARVELL_BG4CD

diff --git a/src/vendorcode/google/chromeos/vboot2/Kconfig b/src/vendorcode/google/chromeos/vboot2/Kconfig
index 3b5c594..8396113 100644
--- a/src/vendorcode/google/chromeos/vboot2/Kconfig
+++ b/src/vendorcode/google/chromeos/vboot2/Kconfig
@@ -16,6 +16,20 @@
 ## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 ##

+config VBOOT_STARTS_IN_BOOTBLOCK
+	bool
+	default n
+	depends on VBOOT_VERIFY_FIRMWARE
+	help
+	  Firmware verification happens during or at the end of bootblock.
+
+config VBOOT_STARTS_IN_ROMSTAGE
+	bool
+	default n
+	depends on VBOOT_VERIFY_FIRMWARE && !VBOOT_STARTS_IN_BOOTBLOCK
+	help
+	  Firmware verification happens during or at the end of romstage.
+
 config VBOOT2_MOCK_SECDATA
    bool "Mock secdata for firmware verification"
    default n
@@ -27,16 +41,6 @@ config VBOOT2_MOCK_SECDATA
      can be used during development when a TPM is not present or broken.
      THIS SHOULD NOT BE LEFT ON FOR PRODUCTION DEVICES.

-config RETURN_FROM_VERSTAGE
-	bool "return from verstage"
-	default n
-	depends on VBOOT_VERIFY_FIRMWARE
-	help
-	  If this is set, the verstage returns back to the bootblock instead of
-	  exits to the romstage so that the verstage space can be reused by the
-	  romstage. Useful if a ram space is too small to fit both the verstage
-	  and the romstage.
-
 config VBOOT_DISABLE_DEV_ON_RECOVERY
    bool "Disable dev mode on recovery requests"
    default n
@@ -46,15 +50,20 @@ config VBOOT_DISABLE_DEV_ON_RECOVERY
      developer mode as soon as recovery request is detected. This is
      handy on embedded devices with limited input capabilities.

-config VERSTAGE_IN_BOOTBLOCK
+config SEPARATE_VERSTAGE
    bool
    default n
    depends on VBOOT_VERIFY_FIRMWARE

-config SEPARATE_VERSTAGE
+config RETURN_FROM_VERSTAGE
    bool
-	default !VERSTAGE_IN_BOOTBLOCK
-	depends on VBOOT_VERIFY_FIRMWARE
+	default n
+	depends on SEPARATE_VERSTAGE
+	help
+	  If this is set, the verstage returns back to the calling stage instead
+	  of exiting to the succeeding stage so that the verstage space can be
+	  reused by the succeeding stage. This is useful if a ram space is too
+	  small to fit both the verstage and the succeeding stage.

# These VBOOT_X_INDEX are the position of X in FW_MAIN_A/B region. The index
 # table is created by cros_bundle_firmware at build time based on the positions
diff --git a/src/vendorcode/google/chromeos/vboot2/Makefile.inc b/src/vendorcode/google/chromeos/vboot2/Makefile.inc
index b2d2dc1..4c53aed 100644
--- a/src/vendorcode/google/chromeos/vboot2/Makefile.inc
+++ b/src/vendorcode/google/chromeos/vboot2/Makefile.inc
@@ -63,5 +63,9 @@ fallback/verstage-file = $(objcbfs)/verstage.elf
 fallback/verstage-type = stage
 fallback/verstage-compression = none
 else
+ifeq ($(VBOOT_STARTS_IN_BOOTBLOCK),y)
 bootblock-srcs += $(objgenerated)/libverstage.a
+else
+romstage-srcs += $(objgenerated)/libverstage.a
 endif
+endif # CONFIG_SEPARATE_VERSTAGE