commit 50509015bf974a7f5ef1e50c683499a78e0d1017
author Devin Moore <devinmoore@google.com> Wed Jan 13 10:45:04 2021 -0800
committer Devin Moore <devinmoore@google.com> Tue Feb 23 07:42:05 2021 -0800
tree 04b0c9b0157df6a61a6186a458841ebd6b0cd0cf
parent 157e6a06e412d144b8de9abf27aa00b5b6c91beb

Support vendor bootconfig creation

Gather all BOARD_BOOTCONFIG parameters.
Create vendor-bootconfig.img with parameters seperated by newlines. Pass
that file to mkbootimg as --vendor_bootconfig to add it to the
vendor_boot.img.

Test: Add BOARD_BOOTCONFIG parameters in cuttlefish .mk file
      Check vendor-bootconfig.img for expected output
      Verify expected vendor_boot.img format with:
      unpack_bootimg --boot_image vendor_boot.img
Test: Update Cuttlefish bootloader to handle the new vendor_boot.img and
      check /proc/bootconfig for the expexted parameters.
Bug: 173815685
Change-Id: Iaa9b71b4bc64375777a5353396e83bb2beb25c47

core/board_config.mk

diff --git a/core/board_config.mk b/core/board_config.mk
index 183bdbb..245a639 100644
--- a/core/board_config.mk
+++ b/core/board_config.mk
@@ -25,6 +25,7 @@
 _board_strip_readonly_list += BOARD_HAVE_BLUETOOTH
 _board_strip_readonly_list += BOARD_INSTALLER_CMDLINE
 _board_strip_readonly_list += BOARD_KERNEL_CMDLINE
+_board_strip_readonly_list += BOARD_BOOTCONFIG
 _board_strip_readonly_list += BOARD_KERNEL_BASE
 _board_strip_readonly_list += BOARD_USES_GENERIC_AUDIO
 _board_strip_readonly_list += BOARD_USES_RECOVERY_AS_BOOT
@@ -222,6 +223,7 @@
 .KATI_READONLY := $(_board_strip_readonly_list)
 
 INTERNAL_KERNEL_CMDLINE := $(BOARD_KERNEL_CMDLINE)
+INTERNAL_BOOTCONFIG := $(BOARD_BOOTCONFIG)
 
 ifneq ($(filter %64,$(TARGET_ARCH)),)
   TARGET_IS_64_BIT := true