[S] Change in coreboot[master]: mb/google/myst: Enable PSP Verstage

[Karthik Ramasubramanian (Code Review)]

Karthik Ramasubramanian has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/75703?usp=email )

Change subject: mb/google/myst: Enable PSP Verstage
......................................................................

mb/google/myst: Enable PSP Verstage

Currently the infrastructure to split the signed AMDFW binaries into
their own section is not ready. So reduce the size for the concerned
FMAP section and enable PSP Verstage.

BUG=b:284984667
TEST=Build Myst BIOS image with PSP Verstage. Boot testing is WIP.

Change-Id: Ie0a54c157ebdebf9a0c95933c96865e0782a0f90
Signed-off-by: Karthikeyan Ramasubramanian 
---
M src/mainboard/google/myst/Kconfig
M src/mainboard/google/myst/chromeos.fmd
2 files changed, 10 insertions(+), 3 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/03/75703/1

diff --git a/src/mainboard/google/myst/Kconfig b/src/mainboard/google/myst/Kconfig
index bfa4d03..1c51452 100644
--- a/src/mainboard/google/myst/Kconfig
+++ b/src/mainboard/google/myst/Kconfig
@@ -69,7 +69,14 @@
    select EC_GOOGLE_CHROMEEC_SWITCHES
    select VBOOT_LID_SWITCH
    select VBOOT_SEPARATE_VERSTAGE
-	select VBOOT_STARTS_IN_BOOTBLOCK
+
+config VBOOT_STARTS_BEFORE_BOOTBLOCK
+	bool "Enable PSP_verstage"
+	default y if VBOOT
+
+config VBOOT_STARTS_IN_BOOTBLOCK
+	bool
+	default y if VBOOT && !VBOOT_STARTS_BEFORE_BOOTBLOCK

# TODO(b/277087492): Enable GSC CBFS verification
 config VBOOT_GSCVD
diff --git a/src/mainboard/google/myst/chromeos.fmd b/src/mainboard/google/myst/chromeos.fmd
index e1502e1..a52a50e 100644
--- a/src/mainboard/google/myst/chromeos.fmd
+++ b/src/mainboard/google/myst/chromeos.fmd
@@ -14,13 +14,13 @@
    	RW_SECTION_A 5M {
    		VBLOCK_A 8K
    		FW_MAIN_A(CBFS)
-			SIGNED_AMDFW_A 2304K
+			SIGNED_AMDFW_A 1536K
    		RW_FWID_A 256
    	}
    	RW_SECTION_B 5M {
    		VBLOCK_B 8K
    		FW_MAIN_B(CBFS)
-			SIGNED_AMDFW_B 2304K
+			SIGNED_AMDFW_B 1536K
    		RW_FWID_B 256
    	}
    	RW_ELOG(PRESERVE) 4K