diff --git a/core/Makefile b/core/Makefile
index 09f9eb0..23f4788 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -2804,14 +2804,6 @@
 vbmetaimage-nodeps:
 	$(build-vbmetaimage-target)
 
-else ifeq (true,$(BOARD_BUILD_DISABLED_VBMETAIMAGE))
-BUILT_DISABLED_VBMETAIMAGE := $(PRODUCT_OUT)/vbmeta.img
-
-INSTALLED_VBMETAIMAGE_TARGET := $(BUILT_DISABLED_VBMETAIMAGE)
-$(INSTALLED_VBMETAIMAGE_TARGET): $(AVBTOOL)
-	$(hide) $(AVBTOOL) make_vbmeta_image \
-	  --flag 2 --padding_size 4096 --output $@
-
 endif # BOARD_AVB_ENABLE
 
 # -----------------------------------------------------------------
@@ -3416,14 +3408,6 @@
 	@# If breakpad symbols have been generated, add them to the zip.
 	$(hide) $(ACP) -r $(TARGET_OUT_BREAKPAD) $(zip_root)/BREAKPAD
 endif
-# BOARD_BUILD_DISABLED_VBMETAIMAGE is used to build a special vbmeta.img
-# that disables AVB verification. The content is fixed and we can just copy
-# it to $(zip_root)/IMAGES without passing some info into misc_info.txt for
-# regeneration.
-ifeq (true,$(BOARD_BUILD_DISABLED_VBMETAIMAGE))
-	$(hide) mkdir -p $(zip_root)/IMAGES
-	$(hide) cp $(INSTALLED_VBMETAIMAGE_TARGET) $(zip_root)/IMAGES/
-endif
 ifdef BOARD_PREBUILT_VENDORIMAGE
 	$(hide) mkdir -p $(zip_root)/IMAGES
 	$(hide) cp $(INSTALLED_VENDORIMAGE_TARGET) $(zip_root)/IMAGES/
diff --git a/target/board/BoardConfigEmuCommon.mk b/target/board/BoardConfigEmuCommon.mk
index ca2176c..a1d5cde 100644
--- a/target/board/BoardConfigEmuCommon.mk
+++ b/target/board/BoardConfigEmuCommon.mk
@@ -28,8 +28,9 @@
 TARGET_COPY_OUT_VENDOR := vendor
 
 # ~100 MB vendor image. Please adjust system image / vendor image sizes
-# when finalizing them.
-BOARD_VENDORIMAGE_PARTITION_SIZE := 100000000
+# when finalizing them. The partition size needs to be a multiple of image
+# block size: 4096.
+BOARD_VENDORIMAGE_PARTITION_SIZE := 100003840
 BOARD_VENDORIMAGE_FILE_SYSTEM_TYPE := ext4
 BOARD_FLASH_BLOCK_SIZE := 512
 DEVICE_MATRIX_FILE   := device/generic/goldfish/compatibility_matrix.xml
diff --git a/target/board/BoardConfigGsiCommon.mk b/target/board/BoardConfigGsiCommon.mk
index c1f3627..7319fec 100644
--- a/target/board/BoardConfigGsiCommon.mk
+++ b/target/board/BoardConfigGsiCommon.mk
@@ -14,14 +14,22 @@
 BOARD_SYSTEMIMAGE_PARTITION_RESERVED_SIZE := 67108864
 
 # Android Verified Boot (AVB):
-#   Builds a special vbmeta.img that disables AVB verification.
-#   Otherwise, AVB will prevent the device from booting the generic system.img.
-#   Also checks that BOARD_AVB_ENABLE is not set, to prevent adding verity
-#   metadata into system.img.
-ifeq ($(BOARD_AVB_ENABLE),true)
-$(error BOARD_AVB_ENABLE cannot be set for GSI)
-endif
-BOARD_BUILD_DISABLED_VBMETAIMAGE := true
+#   1) Sets BOARD_AVB_ENABLE to sign the GSI image.
+#   2) Sets AVB_VBMETA_IMAGE_FLAGS_VERIFICATION_DISABLED (--flag 2) in
+#      vbmeta.img to disable AVB verification.
+#
+# To disable AVB for GSI, use the vbmeta.img and the GSI together.
+# To enable AVB for GSI, include the GSI public key into the device-specific
+# vbmeta.img.
+BOARD_AVB_ENABLE := true
+BOARD_AVB_ROLLBACK_INDEX := $(PLATFORM_SECURITY_PATCH_TIMESTAMP)
+BOARD_AVB_MAKE_VBMETA_IMAGE_ARGS += --flag 2
+
+# Enable chain partition for system.
+BOARD_AVB_SYSTEM_KEY_PATH := external/avb/test/data/testkey_rsa2048.pem
+BOARD_AVB_SYSTEM_ALGORITHM := SHA256_RSA2048
+BOARD_AVB_SYSTEM_ROLLBACK_INDEX := $(PLATFORM_SECURITY_PATCH_TIMESTAMP)
+BOARD_AVB_SYSTEM_ROLLBACK_INDEX_LOCATION := 1
 
 ifneq (,$(filter userdebug eng,$(TARGET_BUILD_VARIANT)))
 # GSI is always userdebug and needs a couple of properties taking precedence
diff --git a/target/board/treble_common.mk b/target/board/treble_common.mk
index daa0f4c..ccb69f2 100644
--- a/target/board/treble_common.mk
+++ b/target/board/treble_common.mk
@@ -53,11 +53,19 @@
 USE_XML_AUDIO_POLICY_CONF := 1
 
 # Android Verified Boot (AVB):
-#   Builds a special vbmeta.img that disables AVB verification.
-#   Otherwise, AVB will prevent the device from booting the generic system.img.
-#   Also checks that BOARD_AVB_ENABLE is not set, to prevent adding verity
-#   metadata into system.img.
-ifeq ($(BOARD_AVB_ENABLE),true)
-$(error BOARD_AVB_ENABLE cannot be set for Treble GSI)
-endif
-BOARD_BUILD_DISABLED_VBMETAIMAGE := true
+#   1) Sets BOARD_AVB_ENABLE to sign the GSI image.
+#   2) Sets AVB_VBMETA_IMAGE_FLAGS_VERIFICATION_DISABLED (--flag 2) in
+#      vbmeta.img to disable AVB verification.
+#
+# To disable AVB for GSI, use the vbmeta.img and the GSI together.
+# To enable AVB for GSI, include the GSI public key into the device-specific
+# vbmeta.img.
+BOARD_AVB_ENABLE := true
+BOARD_AVB_ROLLBACK_INDEX := $(PLATFORM_SECURITY_PATCH_TIMESTAMP)
+BOARD_AVB_MAKE_VBMETA_IMAGE_ARGS += --flag 2
+
+# Enable chain partition for system.
+BOARD_AVB_SYSTEM_KEY_PATH := external/avb/test/data/testkey_rsa2048.pem
+BOARD_AVB_SYSTEM_ALGORITHM := SHA256_RSA2048
+BOARD_AVB_SYSTEM_ROLLBACK_INDEX := $(PLATFORM_SECURITY_PATCH_TIMESTAMP)
+BOARD_AVB_SYSTEM_ROLLBACK_INDEX_LOCATION := 1