mb/lenovo/*: Add support for VBOOT on 8MiB devices

Enable VBOOT support on all devices that have a 8 MiB flash, using a
single RW_MAIN_A partition, allowing the use of tianocore payload in
both RW_MAIN_A and WP_RO.

* Add VBNV section to cmos.layout
* Add FMAP for VBOOT and regular boot
* Select Kconfigs for VBOOT
* Enable VBOOT_SLOTS_RW_A by default

Also build test VBOOT on Lenovo T420.

Tested on Lenovo T520 using Icb7b263ed86551cc53e1db7babccaca6b3ae2fe6.

Change-Id: Icb7b263ed86551cc53e1db7babccaca6b3ae2fe6
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32585
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/src/mainboard/lenovo/t420/board.fmd b/src/mainboard/lenovo/t420/board.fmd
new file mode 100644
index 0000000000..04cf827a87
--- /dev/null
+++ b/src/mainboard/lenovo/t420/board.fmd
@@ -0,0 +1,16 @@
+FLASH@0xff800000 0x800000 {
+	SI_ALL@0x0 0x500000 {
+		SI_DESC@0x0 0x1000
+		SI_GBE@0x1000 0x2000
+		SI_ME@0x3000 0x4ed000
+	}
+	SI_BIOS@0x500000 0x300000 {
+		RW_MRC_CACHE@0 0x10000
+		SMMSTORE(PRESERVE)@0x10000 0x40000
+
+		WP_RO@0x50000 0x2a0000 {
+			FMAP@0x0 0x800
+			COREBOOT(CBFS)@0x1000 0x29f000
+		}
+	}
+}