diff --git a/core/Makefile b/core/Makefile
index b5f5b35..6f11590 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -4090,7 +4090,8 @@
 
 INTERNAL_AVB_PARTITIONS_IN_CHAINED_VBMETA_IMAGES := \
     $(BOARD_AVB_VBMETA_SYSTEM) \
-    $(BOARD_AVB_VBMETA_VENDOR)
+    $(BOARD_AVB_VBMETA_VENDOR) \
+    $(foreach partition,$(BOARD_AVB_VBMETA_CUSTOM_PARTITIONS),$(BOARD_AVB_VBMETA_$(call to-upper,$(partition))))
 
 # Not allowing the same partition to appear in multiple groups.
 ifneq ($(words $(sort $(INTERNAL_AVB_PARTITIONS_IN_CHAINED_VBMETA_IMAGES))),$(words $(INTERNAL_AVB_PARTITIONS_IN_CHAINED_VBMETA_IMAGES)))
@@ -4396,6 +4397,11 @@
 $(eval $(call check-and-set-avb-args,vbmeta_vendor))
 endif
 
+ifdef BOARD_AVB_VBMETA_CUSTOM_PARTITIONS
+$(foreach partition,$(BOARD_AVB_VBMETA_CUSTOM_PARTITIONS),$(eval $(call check-and-set-avb-args,vbmeta_$(partition))))
+$(foreach partition,$(BOARD_AVB_VBMETA_CUSTOM_PARTITIONS),$(eval BOARD_AVB_MAKE_VBMETA_$(call to-upper,$(partition))_IMAGE_ARGS += --padding_size 4096))
+endif
+
 ifneq ($(strip $(BOARD_CUSTOMIMAGES_PARTITION_LIST)),)
 $(foreach partition,$(BOARD_CUSTOMIMAGES_PARTITION_LIST), \
     $(eval $(call check-and-set-custom-avb-chain-args,$(partition))))
@@ -4424,6 +4430,13 @@
     --rollback_index $(BOARD_AVB_VBMETA_VENDOR_ROLLBACK_INDEX)
 endif
 
+ifdef BOARD_AVB_VBMETA_CUSTOM_PARTITIONS
+  $(foreach partition,$(call to-upper,$(BOARD_AVB_VBMETA_CUSTOM_PARTITIONS)), \
+      $(if $(BOARD_AVB_VBMETA_$(partition)_ROLLBACK_INDEX),$(eval \
+        BOARD_AVB_MAKE_VBMETA_$(partition)_IMAGE_ARGS += \
+          --rollback_index $(BOARD_AVB_VBMETA_$(partition)_ROLLBACK_INDEX))))
+endif
+
 # $(1): the directory to extract public keys to
 define extract-avb-chain-public-keys
   $(if $(BOARD_AVB_BOOT_KEY_PATH),\
@@ -4480,7 +4493,11 @@
   $(if $(BOARD_CUSTOMIMAGES_PARTITION_LIST),\
     $(hide) $(foreach partition,$(BOARD_CUSTOMIMAGES_PARTITION_LIST), \
         $(AVBTOOL) extract_public_key --key $(BOARD_AVB_$(call to-upper,$(partition))_KEY_PATH) \
-            --output $(1)/$(partition).avbpubkey;))
+            --output $(1)/$(partition).avbpubkey;)) \
+  $(if $(BOARD_AVB_VBMETA_CUSTOM_PARTITIONS),\
+    $(hide) $(foreach partition,$(BOARD_AVB_VBMETA_CUSTOM_PARTITIONS), \
+        $(AVBTOOL) extract_public_key --key $(BOARD_AVB_VBMETA_$(call to-upper,$(partition))_KEY_PATH) \
+            --output $(1)/vbmeta_$(partition).avbpubkey;))
 endef
 
 # Builds a chained VBMeta image. This VBMeta image will contain the descriptors for the partitions
@@ -4492,13 +4509,13 @@
 # $(1): VBMeta image name, such as "vbmeta_system", "vbmeta_vendor" etc.
 # $(2): Output filename.
 define build-chained-vbmeta-image
-  $(call pretty,"Target chained vbmeta image: $@")
-  $(hide) $(AVBTOOL) make_vbmeta_image \
-      $(INTERNAL_AVB_$(call to-upper,$(1))_SIGNING_ARGS) \
-      $(BOARD_AVB_MAKE_$(call to-upper,$(1))_IMAGE_ARGS) \
-      $(foreach image,$(BOARD_AVB_$(call to-upper,$(1))), \
-          --include_descriptors_from_image $(call images-for-partitions,$(image))) \
-      --output $@
+	$(call pretty,"Target chained vbmeta image: $@")
+	$(hide) $(AVBTOOL) make_vbmeta_image \
+	    $(INTERNAL_AVB_$(call to-upper,$(1))_SIGNING_ARGS) \
+	    $(BOARD_AVB_MAKE_$(call to-upper,$(1))_IMAGE_ARGS) \
+	    $(foreach image,$(BOARD_AVB_$(call to-upper,$(1))), \
+	        --include_descriptors_from_image $(call images-for-partitions,$(image))) \
+	    --output $@
 endef
 
 ifdef BUILDING_SYSTEM_IMAGE
@@ -4526,7 +4543,26 @@
 
 $(call declare-1p-container,$(INSTALLED_VBMETA_VENDORIMAGE_TARGET),)
 
-UNMOUNTED_NOTICE_VENDOR_DEPS+= $(INSTALLED_VBMETA_VENDORIMAGE_TARGET)
+UNMOUNTED_NOTICE_VENDOR_DEPS += $(INSTALLED_VBMETA_VENDORIMAGE_TARGET)
+endif
+
+ifdef BOARD_AVB_VBMETA_CUSTOM_PARTITIONS
+define declare-custom-vbmeta-target
+INSTALLED_VBMETA_$(call to-upper,$(1))IMAGE_TARGET := $(PRODUCT_OUT)/vbmeta_$(call to-lower,$(1)).img
+$$(INSTALLED_VBMETA_$(call to-upper,$(1))IMAGE_TARGET): \
+	    $(AVBTOOL) \
+	    $(call images-for-partitions,$(BOARD_AVB_VBMETA_$(call to-upper,$(1)))) \
+	    $(BOARD_AVB_VBMETA_$(call to-upper,$(1))_KEY_PATH)
+	$$(call build-chained-vbmeta-image,vbmeta_$(call to-lower,$(1)))
+
+$(call declare-1p-container,$(INSTALLED_VBMETA_$(call to-upper,$(1))IMAGE_TARGET),)
+
+UNMOUNTED_NOTICE_VENDOR_DEPS += $(INSTALLED_VBMETA_$(call to-upper,$(1))IMAGE_TARGET)
+endef
+
+$(foreach partition,\
+          $(call to-upper,$(BOARD_AVB_VBMETA_CUSTOM_PARTITIONS)),\
+          $(eval $(call declare-custom-vbmeta-target,$(partition))))
 endif
 
 define build-vbmetaimage-target
@@ -4566,8 +4602,10 @@
 	    $(INSTALLED_RECOVERYIMAGE_TARGET) \
 	    $(INSTALLED_VBMETA_SYSTEMIMAGE_TARGET) \
 	    $(INSTALLED_VBMETA_VENDORIMAGE_TARGET) \
+      $(foreach partition,$(call to-upper,$( BOARD_AVB_VBMETA_CUSTOM_PARTITIONS)),$(INSTALLED_VBMETA_$(partition)IMAGE_TARGET)) \
 	    $(BOARD_AVB_VBMETA_SYSTEM_KEY_PATH) \
 	    $(BOARD_AVB_VBMETA_VENDOR_KEY_PATH) \
+      $(foreach partition,$(call to-upper,$( BOARD_AVB_VBMETA_CUSTOM_PARTITIONS)),$(BOARD_AVB_VBMETA_$(partition)_KEY_PATH)) \
 	    $(BOARD_AVB_KEY_PATH)
 	$(build-vbmetaimage-target)
 
@@ -5319,6 +5357,15 @@
 	$(hide) echo "avb_vbmeta_vendor_algorithm=$(BOARD_AVB_VBMETA_VENDOR_ALGORITHM)" >> $@
 	$(hide) echo "avb_vbmeta_vendor_rollback_index_location=$(BOARD_AVB_VBMETA_VENDOR_ROLLBACK_INDEX_LOCATION)" >> $@
 endif # BOARD_AVB_VBMETA_VENDOR_KEY_PATH
+ifneq (,$(strip $(BOARD_AVB_VBMETA_CUSTOM_PARTITIONS)))
+	$(hide) echo "avb_custom_vbmeta_images_partition_list=$(BOARD_AVB_VBMETA_CUSTOM_PARTITIONS)" >> $@
+	$(hide) $(foreach partition,$(BOARD_AVB_VBMETA_CUSTOM_PARTITIONS),\
+	echo "avb_vbmeta_$(partition)=$(BOARD_AVB_VBMETA_$(call to-upper,$(partition)))" >> $@ ;\
+	echo "avb_vbmeta_$(partition)_args=$(BOARD_AVB_MAKE_VBMETA_$(call to-upper,$(partition))_IMAGE_ARGS)" >> $@ ;\
+	echo "avb_vbmeta_$(partition)_key_path=$(BOARD_AVB_VBMETA_$(call to-upper,$(partition))_KEY_PATH)" >> $@ ;\
+	echo "avb_vbmeta_$(partition)_algorithm=$(BOARD_AVB_VBMETA_$(call to-upper,$(partition))_ALGORITHM)" >> $@ ;\
+	echo "avb_vbmeta_$(partition)_rollback_index_location=$(BOARD_AVB_VBMETA_$(call to-upper,$(partition))_ROLLBACK_INDEX_LOCATION)" >> $@ ;)
+endif # BOARD_AVB_VBMETA_CUSTOM_PARTITIONS
 endif # BOARD_AVB_ENABLE
 ifdef BOARD_BPT_INPUT_FILES
 	$(hide) echo "board_bpt_enable=true" >> $@
diff --git a/core/main.mk b/core/main.mk
index 0453cda..2d501c9 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -1602,6 +1602,9 @@
 .PHONY: vbmetavendorimage
 vbmetavendorimage: $(INSTALLED_VBMETA_VENDORIMAGE_TARGET)
 
+.PHONY: vbmetacustomimages
+vbmetacustomimages: $(foreach partition,$(call to-upper,$(BOARD_AVB_VBMETA_CUSTOM_PARTITIONS)),$(INSTALLED_VBMETA_$(partition)IMAGE_TARGET))
+
 # The droidcore-unbundled target depends on the subset of targets necessary to
 # perform a full system build (either unbundled or not).
 .PHONY: droidcore-unbundled
diff --git a/tools/releasetools/add_img_to_target_files.py b/tools/releasetools/add_img_to_target_files.py
index d308a55..b45b0a3 100644
--- a/tools/releasetools/add_img_to_target_files.py
+++ b/tools/releasetools/add_img_to_target_files.py
@@ -1132,6 +1132,21 @@
           item for item in vbmeta_partitions
           if item not in vbmeta_vendor.split()]
       vbmeta_partitions.append("vbmeta_vendor")
+    custom_avb_partitions = OPTIONS.info_dict.get("avb_custom_vbmeta_images_partition_list", "").strip().split()
+    if custom_avb_partitions:
+      for avb_part in custom_avb_partitions:
+        partition_name = "vbmeta_" + avb_part
+        included_partitions = OPTIONS.info_dict.get("avb_vbmeta_{}".format(avb_part), "").strip().split()
+        assert included_partitions, "Custom vbmeta partition {0} missing avb_vbmeta_{0} prop".format(avb_part)
+        banner(partition_name)
+        logger.info("VBMeta partition {} needs {}".format(partition_name, included_partitions))
+        partitions[partition_name] = AddVBMeta(
+            output_zip, partitions, partition_name, included_partitions)
+        vbmeta_partitions = [
+            item for item in vbmeta_partitions
+            if item not in included_partitions]
+        vbmeta_partitions.append(partition_name)
+
 
     if OPTIONS.info_dict.get("avb_building_vbmeta_image") == "true":
       banner("vbmeta")
diff --git a/tools/releasetools/common.py b/tools/releasetools/common.py
index 2f05d44..9919029 100644
--- a/tools/releasetools/common.py
+++ b/tools/releasetools/common.py
@@ -1503,12 +1503,14 @@
 
   custom_partitions = OPTIONS.info_dict.get(
       "avb_custom_images_partition_list", "").strip().split()
+  custom_avb_partitions = ["vbmeta_" + part for part in OPTIONS.info_dict.get("avb_custom_vbmeta_images_partition_list", "").strip().split()]
 
   for partition, path in partitions.items():
     if partition not in needed_partitions:
       continue
     assert (partition in AVB_PARTITIONS or
             partition in AVB_VBMETA_PARTITIONS or
+            partition in custom_avb_partitions or
             partition in custom_partitions), \
         'Unknown partition: {}'.format(partition)
     assert os.path.exists(path), \