diff --git a/core/Makefile b/core/Makefile
index 7aa1019..39969bc 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -423,6 +423,32 @@
 	$(hide) build/make/tools/post_process_props.py $@
 endif  # property_overrides_split_enabled
 
+# -----------------------------------------------------------------
+# product build.prop
+INSTALLED_PRODUCT_BUILD_PROP_TARGET := $(TARGET_OUT_PRODUCT)/build.prop
+ALL_DEFAULT_INSTALLED_MODULES += $(INSTALLED_PRODUCT_BUILD_PROP_TARGET)
+
+FINAL_PRODUCT_PROPERTIES += \
+    $(call collapse-pairs, $(PRODUCT_PRODUCT_PROPERTIES))
+FINAL_PRODUCT_PROPERTIES := $(call uniq-pairs-by-first-component, \
+    $(FINAL_PRODUCT_PROPERTIES),=)
+
+$(INSTALLED_PRODUCT_BUILD_PROP_TARGET):
+	@echo Target product buildinfo: $@
+	@mkdir -p $(dir $@)
+	$(hide) echo > $@
+ifdef BOARD_USES_PRODUCTIMAGE
+	$(hide) echo ro.product.build.date=`$(DATE_FROM_FILE)`>>$@
+	$(hide) echo ro.product.build.date.utc=`$(DATE_FROM_FILE) +%s`>>$@
+	$(hide) echo ro.product.build.fingerprint="$(BUILD_FINGERPRINT_FROM_FILE)">>$@
+endif  # BOARD_USES_PRODUCTIMAGE
+	$(hide) echo "#" >> $@; \
+	        echo "# ADDITIONAL PRODUCT PROPERTIES" >> $@; \
+	        echo "#" >> $@;
+	$(hide) $(foreach line,$(FINAL_PRODUCT_PROPERTIES), \
+		echo "$(line)" >> $@;)
+	$(hide) build/make/tools/post_process_props.py $@
+
 # ----------------------------------------------------------------
 
 # -----------------------------------------------------------------
@@ -1013,7 +1039,7 @@
 ifneq (true,$(TARGET_USERIMAGES_SPARSE_SQUASHFS_DISABLED))
   INTERNAL_USERIMAGES_SPARSE_SQUASHFS_FLAG := -s
 endif
-ifneq ($(filter $(BOARD_VENDORIMAGE_FILE_SYSTEM_TYPE) $(BOARD_SYSTEMIMAGE_FILE_SYSTEM_TYPE),squashfs),)
+ifneq ($(filter $(BOARD_PRODUCTIMAGE_FILE_SYSTEM_TYPE) $(BOARD_VENDORIMAGE_FILE_SYSTEM_TYPE) $(BOARD_SYSTEMIMAGE_FILE_SYSTEM_TYPE),squashfs),)
 INTERNAL_USERIMAGES_DEPS += $(MAKE_SQUASHFS) $(MKSQUASHFSUSERIMG) $(IMG2SIMG)
 endif
 
@@ -1066,6 +1092,15 @@
 $(if $(BOARD_VENDORIMAGE_SQUASHFS_BLOCK_SIZE),$(hide) echo "vendor_squashfs_block_size=$(BOARD_VENDORIMAGE_SQUASHFS_BLOCK_SIZE)" >> $(1))
 $(if $(BOARD_VENDORIMAGE_SQUASHFS_DISABLE_4K_ALIGN),$(hide) echo "vendor_squashfs_disable_4k_align=$(BOARD_VENDORIMAGE_SQUASHFS_DISABLE_4K_ALIGN)" >> $(1))
 $(if $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VENDOR_BASE_FS_PATH),$(hide) echo "vendor_base_fs_file=$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VENDOR_BASE_FS_PATH)" >> $(1))
+$(if $(BOARD_PRODUCTIMAGE_FILE_SYSTEM_TYPE),$(hide) echo "product_fs_type=$(BOARD_PRODUCTIMAGE_FILE_SYSTEM_TYPE)" >> $(1))
+$(if $(BOARD_PRODUCTIMAGE_EXTFS_INODE_COUNT),$(hide) echo "product_extfs_inode_count=$(BOARD_PRODUCTIMAGE_EXTFS_INODE_COUNT)" >> $(1))
+$(if $(BOARD_PRODUCTIMAGE_PARTITION_SIZE),$(hide) echo "product_size=$(BOARD_PRODUCTIMAGE_PARTITION_SIZE)" >> $(1))
+$(if $(BOARD_PRODUCTIMAGE_JOURNAL_SIZE),$(hide) echo "product_journal_size=$(BOARD_PRODUCTIMAGE_JOURNAL_SIZE)" >> $(1))
+$(if $(BOARD_PRODUCTIMAGE_SQUASHFS_COMPRESSOR),$(hide) echo "product_squashfs_compressor=$(BOARD_PRODUCTIMAGE_SQUASHFS_COMPRESSOR)" >> $(1))
+$(if $(BOARD_PRODUCTIMAGE_SQUASHFS_COMPRESSOR_OPT),$(hide) echo "product_squashfs_compressor_opt=$(BOARD_PRODUCTIMAGE_SQUASHFS_COMPRESSOR_OPT)" >> $(1))
+$(if $(BOARD_PRODUCTIMAGE_SQUASHFS_BLOCK_SIZE),$(hide) echo "product_squashfs_block_size=$(BOARD_PRODUCTIMAGE_SQUASHFS_BLOCK_SIZE)" >> $(1))
+$(if $(BOARD_PRODUCTIMAGE_SQUASHFS_DISABLE_4K_ALIGN),$(hide) echo "product_squashfs_disable_4k_align=$(BOARD_PRODUCTIMAGE_SQUASHFS_DISABLE_4K_ALIGN)" >> $(1))
+$(if $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_PRODUCT_BASE_FS_PATH),$(hide) echo "product_base_fs_file=$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_PRODUCT_BASE_FS_PATH)" >> $(1))
 $(if $(BOARD_OEMIMAGE_PARTITION_SIZE),$(hide) echo "oem_size=$(BOARD_OEMIMAGE_PARTITION_SIZE)" >> $(1))
 $(if $(BOARD_OEMIMAGE_JOURNAL_SIZE),$(hide) echo "oem_journal_size=$(BOARD_OEMIMAGE_JOURNAL_SIZE)" >> $(1))
 $(if $(BOARD_OEMIMAGE_EXTFS_INODE_COUNT),$(hide) echo "oem_extfs_inode_count=$(BOARD_OEMIMAGE_EXTFS_INODE_COUNT)" >> $(1))
@@ -1080,6 +1115,7 @@
 $(if $(filter eng, $(TARGET_BUILD_VARIANT)),$(hide) echo "verity_disable=true" >> $(1))
 $(if $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SYSTEM_VERITY_PARTITION),$(hide) echo "system_verity_block_device=$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SYSTEM_VERITY_PARTITION)" >> $(1))
 $(if $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VENDOR_VERITY_PARTITION),$(hide) echo "vendor_verity_block_device=$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VENDOR_VERITY_PARTITION)" >> $(1))
+$(if $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_PRODUCT_VERITY_PARTITION),$(hide) echo "product_verity_block_device=$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_PRODUCT_VERITY_PARTITION)" >> $(1))
 $(if $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_VBOOT),$(hide) echo "vboot=$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_VBOOT)" >> $(1))
 $(if $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_VBOOT),$(hide) echo "vboot_key=$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VBOOT_SIGNING_KEY)" >> $(1))
 $(if $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_VBOOT),$(hide) echo "vboot_subkey=$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VBOOT_SIGNING_SUBKEY)" >> $(1))
@@ -1100,6 +1136,13 @@
         $(hide) echo "avb_vendor_key_path=$(BOARD_AVB_VENDOR_KEY_PATH)" >> $(1)
         $(hide) echo "avb_vendor_algorithm=$(BOARD_AVB_VENDOR_ALGORITHM)" >> $(1)
         $(hide) echo "avb_vendor_rollback_index_location=$(BOARD_AVB_VENDOR_ROLLBACK_INDEX_LOCATION)" >> $(1)))
+$(if $(BOARD_AVB_ENABLE),$(hide) echo "avb_product_hashtree_enable=$(BOARD_AVB_ENABLE)" >> $(1))
+$(if $(BOARD_AVB_ENABLE),$(hide) echo "avb_product_add_hashtree_footer_args=$(BOARD_AVB_PRODUCT_ADD_HASHTREE_FOOTER_ARGS)" >> $(1))
+$(if $(BOARD_AVB_ENABLE),\
+    $(if $(BOARD_AVB_PRODUCT_KEY_PATH),\
+        $(hide) echo "avb_product_key_path=$(BOARD_AVB_PRODUCT_KEY_PATH)" >> $(1)
+        $(hide) echo "avb_product_algorithm=$(BOARD_AVB_PRODUCT_ALGORITHM)" >> $(1)
+        $(hide) echo "avb_product_rollback_index_location=$(BOARD_AVB_PRODUCT_ROLLBACK_INDEX_LOCATION)" >> $(1)))
 $(if $(filter true,$(BOARD_USES_RECOVERY_AS_BOOT)),\
     $(hide) echo "recovery_as_boot=true" >> $(1))
 $(if $(filter true,$(BOARD_BUILD_SYSTEM_ROOT_IMAGE)),\
@@ -1151,6 +1194,9 @@
 ifdef property_overrides_split_enabled
 recovery_build_props += $(INSTALLED_VENDOR_BUILD_PROP_TARGET)
 endif
+ifdef BOARD_USES_PRODUCTIMAGE
+recovery_build_props += $(INSTALLED_PRODUCT_BUILD_PROP_TARGET)
+endif
 recovery_resources_common := $(call include-path-for, recovery)/res
 
 # Set recovery_density to the density bucket of the device.
@@ -1443,10 +1489,26 @@
 endef
 endif
 
+# Create symlink /system/product to /product if necessary.
+ifdef BOARD_USES_PRODUCTIMAGE
+define create-system-product-symlink
+$(hide) if [ -d $(TARGET_OUT)/product ] && [ ! -h $(TARGET_OUT)/product ]; then \
+  echo 'Non-symlink $(TARGET_OUT)/product detected!' 1>&2; \
+  echo 'You cannot install files to $(TARGET_OUT)/product while building a separate product.img!' 1>&2; \
+  exit 1; \
+fi
+$(hide) ln -sf /product $(TARGET_OUT)/product
+endef
+else
+define create-system-product-symlink
+endef
+endif
+
 # $(1): output file
 define build-systemimage-target
   @echo "Target system fs image: $(1)"
   $(call create-system-vendor-symlink)
+  $(call create-system-product-symlink)
   @mkdir -p $(dir $(1)) $(systemimage_intermediates) && rm -rf $(systemimage_intermediates)/system_image_info.txt
   $(call generate-userimage-prop-dictionary, $(systemimage_intermediates)/system_image_info.txt, \
       skip_fsck=true)
@@ -1521,6 +1583,7 @@
 define build-systemtarball-target
   $(call pretty,"Target system fs tarball: $(INSTALLED_SYSTEMTARBALL_TARGET)")
   $(call create-system-vendor-symlink)
+  $(call create-system-product-symlink)
   $(MKTARBALL) $(FS_GET_STATS) \
     $(PRODUCT_OUT) system $(PRIVATE_SYSTEM_TAR) \
     $(INSTALLED_SYSTEMTARBALL_TARGET) $(TARGET_OUT)
@@ -1601,6 +1664,10 @@
 	$(hide) cd $(dir $@) && zip -qryX $(notdir $@) \
 		$(TARGET_COPY_OUT_VENDOR)
 endif
+ifdef BOARD_PRODUCTIMAGE_FILE_SYSTEM_TYPE
+	$(hide) cd $(dir $@) && zip -qryX $(notdir $@) \
+		$(TARGET_COPY_OUT_PRODUCT)
+endif
 ifneq ($(PDK_PLATFORM_JAVA_ZIP_CONTENTS),)
 	$(hide) cd $(OUT_DIR) && zip -qryX $(patsubst $(OUT_DIR)/%,%,$@) $(PDK_PLATFORM_JAVA_ZIP_CONTENTS)
 endif
@@ -1909,6 +1976,55 @@
 endif
 
 # -----------------------------------------------------------------
+# product partition image
+ifdef BOARD_PRODUCTIMAGE_FILE_SYSTEM_TYPE
+INTERNAL_PRODUCTIMAGE_FILES := \
+    $(filter $(TARGET_OUT_PRODUCT)/%,\
+      $(ALL_DEFAULT_INSTALLED_MODULES)\
+      $(ALL_PDK_FUSION_FILES))
+
+# platform.zip depends on $(INTERNAL_PRODUCTIMAGE_FILES).
+$(INSTALLED_PLATFORM_ZIP) : $(INTERNAL_PRODUCTIMAGE_FILES)
+
+INSTALLED_FILES_FILE_PRODUCT := $(PRODUCT_OUT)/installed-files-product.txt
+$(INSTALLED_FILES_FILE_PRODUCT) : $(INTERNAL_PRODUCTIMAGE_FILES) $(FILESLIST)
+	@echo Installed file list: $@
+	@mkdir -p $(dir $@)
+	@rm -f $@
+	$(hide) $(FILESLIST) $(TARGET_OUT_PRODUCT) > $(@:.txt=.json)
+	$(hide) build/tools/fileslist_util.py -c $(@:.txt=.json) > $@
+
+productimage_intermediates := \
+    $(call intermediates-dir-for,PACKAGING,product)
+BUILT_PRODUCTIMAGE_TARGET := $(PRODUCT_OUT)/product.img
+define build-productimage-target
+  $(call pretty,"Target product fs image: $(INSTALLED_PRODUCTIMAGE_TARGET)")
+  @mkdir -p $(TARGET_OUT_PRODUCT)
+  @mkdir -p $(productimage_intermediates) && rm -rf $(productimage_intermediates)/product_image_info.txt
+  $(call generate-userimage-prop-dictionary, $(productimage_intermediates)/product_image_info.txt, skip_fsck=true)
+  $(hide) PATH=$(foreach p,$(INTERNAL_USERIMAGES_BINARY_PATHS),$(p):)$$PATH \
+      ./build/tools/releasetools/build_image.py \
+      $(TARGET_OUT_PRODUCT) $(productimage_intermediates)/product_image_info.txt $(INSTALLED_PRODUCTIMAGE_TARGET) $(TARGET_OUT)
+  $(hide) $(call assert-max-image-size,$(INSTALLED_PRODUCTIMAGE_TARGET),$(BOARD_PRODUCTIMAGE_PARTITION_SIZE))
+endef
+
+# We just build this directly to the install location.
+INSTALLED_PRODUCTIMAGE_TARGET := $(BUILT_PRODUCTIMAGE_TARGET)
+$(INSTALLED_PRODUCTIMAGE_TARGET): $(INTERNAL_USERIMAGES_DEPS) $(INTERNAL_PRODUCTIMAGE_FILES) $(INSTALLED_FILES_FILE_PRODUCT) $(BUILD_IMAGE_SRCS)
+	$(build-productimage-target)
+
+.PHONY: productimage-nodeps pnod
+productimage-nodeps pnod: | $(INTERNAL_USERIMAGES_DEPS)
+	$(build-productimage-target)
+
+sync: $(INTERNAL_PRODUCTIMAGE_FILES)
+
+else ifdef BOARD_PREBUILT_PRODUCTIMAGE
+INSTALLED_PRODUCTIMAGE_TARGET := $(PRODUCT_OUT)/product.img
+$(eval $(call copy-one-file,$(BOARD_PREBUILT_PRODUCTIMAGE),$(INSTALLED_PRODUCTIMAGE_TARGET)))
+endif
+
+# -----------------------------------------------------------------
 # dtbo image
 ifdef BOARD_PREBUILT_DTBOIMAGE
 INSTALLED_DTBOIMAGE_TARGET := $(PRODUCT_OUT)/dtbo.img
@@ -1962,6 +2078,7 @@
 SYSTEM_FOOTER_ARGS := BOARD_AVB_SYSTEM_ADD_HASHTREE_FOOTER_ARGS
 VENDOR_FOOTER_ARGS := BOARD_AVB_VENDOR_ADD_HASHTREE_FOOTER_ARGS
 RECOVERY_FOOTER_ARGS := BOARD_AVB_RECOVERY_ADD_HASH_FOOTER_ARGS
+PRODUCT_FOOTER_ARGS := BOARD_AVB_PRODUCT_ADD_HASHTREE_FOOTER_ARGS
 
 # Check and set required build variables for a chain partition.
 # $(1): the partition to enable AVB chain, e.g., BOOT or SYSTEM.
@@ -2014,6 +2131,15 @@
 endif
 endif
 
+ifdef INSTALLED_PRODUCTIMAGE_TARGET
+ifdef BOARD_AVB_PRODUCT_KEY_PATH
+$(eval $(call check-and-set-avb-chain-args,PRODUCT))
+else
+INTERNAL_AVB_MAKE_VBMETA_IMAGE_ARGS += \
+    --include_descriptors_from_image $(INSTALLED_PRODUCTIMAGE_TARGET)
+endif
+endif
+
 ifdef INSTALLED_DTBOIMAGE_TARGET
 ifdef BOARD_AVB_DTBO_KEY_PATH
 $(eval $(call check-and-set-avb-chain-args,DTBO))
@@ -2067,6 +2193,9 @@
   $(if $(BOARD_AVB_VENDOR_KEY_PATH),\
     $(hide) $(AVBTOOL) extract_public_key --key $(BOARD_AVB_VENDOR_KEY_PATH) \
       --output $(1)/vendor.avbpubkey)
+  $(if $(BOARD_AVB_PRODUCT_KEY_PATH),\
+    $(hide) $(AVBTOOL) extract_public_key --key $(BOARD_AVB_PRODUCT_KEY_PATH) \
+      --output $(1)/product.avbpubkey)
   $(if $(BOARD_AVB_DTBO_KEY_PATH),\
     $(hide) $(AVBTOOL) extract_public_key --key $(BOARD_AVB_DTBO_KEY_PATH) \
       --output $(1)/dtbo.avbpubkey)
@@ -2093,6 +2222,7 @@
 		$(INSTALLED_BOOTIMAGE_TARGET) \
 		$(INSTALLED_SYSTEMIMAGE) \
 		$(INSTALLED_VENDORIMAGE_TARGET) \
+		$(INSTALLED_PRODUCTIMAGE_TARGET) \
 		$(INSTALLED_DTBOIMAGE_TARGET) \
 		$(INSTALLED_RECOVERYIMAGE_TARGET) \
 		$(BOARD_AVB_KEY_PATH)
@@ -2356,6 +2486,7 @@
 		$(INSTALLED_USERDATAIMAGE_TARGET) \
 		$(INSTALLED_CACHEIMAGE_TARGET) \
 		$(INSTALLED_VENDORIMAGE_TARGET) \
+		$(INSTALLED_PRODUCTIMAGE_TARGET) \
 		$(INSTALLED_VBMETAIMAGE_TARGET) \
 		$(INSTALLED_DTBOIMAGE_TARGET) \
 		$(INTERNAL_SYSTEMOTHERIMAGE_FILES) \
@@ -2364,6 +2495,7 @@
 		$(INSTALLED_2NDBOOTLOADER_TARGET) \
 		$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SYSTEM_BASE_FS_PATH) \
 		$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VENDOR_BASE_FS_PATH) \
+		$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_PRODUCT_BASE_FS_PATH) \
 		$(SELINUX_FC) \
 		$(APKCERTS_FILE) \
 		$(SOONG_ZIP) \
@@ -2376,6 +2508,7 @@
 		| $(ACP)
 	@echo "Package target files: $@"
 	$(call create-system-vendor-symlink)
+	$(call create-system-product-symlink)
 	$(hide) rm -rf $@ $@.list $(zip_root)
 	$(hide) mkdir -p $(dir $@) $(zip_root)
 ifneq (,$(INSTALLED_RECOVERYIMAGE_TARGET)$(filter true,$(BOARD_USES_RECOVERY_AS_BOOT)))
@@ -2441,6 +2574,11 @@
 	$(hide) $(call package_files-copy-root, \
 		$(TARGET_OUT_VENDOR),$(zip_root)/VENDOR)
 endif
+ifdef BOARD_PRODUCTIMAGE_FILE_SYSTEM_TYPE
+	@# Contents of the product image
+	$(hide) $(call package_files-copy-root, \
+		$(TARGET_OUT_PRODUCT),$(zip_root)/PRODUCT)
+endif
 ifdef INSTALLED_SYSTEMOTHERIMAGE_TARGET
 	@# Contents of the system_other image
 	$(hide) $(call package_files-copy-root, \
@@ -2505,6 +2643,10 @@
 	$(hide) cp $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VENDOR_BASE_FS_PATH) \
 	  $(zip_root)/META/$(notdir $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_VENDOR_BASE_FS_PATH))
 endif
+ifneq ($(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_PRODUCT_BASE_FS_PATH),)
+	$(hide) cp $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_PRODUCT_BASE_FS_PATH) \
+	  $(zip_root)/META/$(notdir $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_PRODUCT_BASE_FS_PATH))
+endif
 ifneq ($(strip $(SANITIZE_TARGET)),)
 	# We need to create userdata.img with real data because the instrumented libraries are in userdata.img.
 	$(hide) echo "userdata_img_with_data=true" >> $(zip_root)/META/misc_info.txt
@@ -2588,6 +2730,10 @@
 	$(hide) mkdir -p $(zip_root)/IMAGES
 	$(hide) cp $(INSTALLED_VENDORIMAGE_TARGET) $(zip_root)/IMAGES/
 endif
+ifdef BOARD_PREBUILT_PRODUCTIMAGE
+	$(hide) mkdir -p $(zip_root)/IMAGES
+	$(hide) cp $(INSTALLED_PRODUCTIMAGE_TARGET) $(zip_root)/IMAGES/
+endif
 ifdef BOARD_PREBUILT_BOOTIMAGE
 	$(hide) mkdir -p $(zip_root)/IMAGES
 	$(hide) cp $(INSTALLED_BOOTIMAGE_TARGET) $(zip_root)/IMAGES/
@@ -2618,6 +2764,9 @@
 ifdef BOARD_VENDORIMAGE_FILE_SYSTEM_TYPE
 	$(hide) $(call fs_config,$(zip_root)/VENDOR,vendor/) > $(zip_root)/META/vendor_filesystem_config.txt
 endif
+ifdef BOARD_PRODUCTIMAGE_FILE_SYSTEM_TYPE
+	$(hide) $(call fs_config,$(zip_root)/PRODUCT,product/) > $(zip_root)/META/product_filesystem_config.txt
+endif
 ifeq ($(BOARD_BUILD_SYSTEM_ROOT_IMAGE),true)
 	$(hide) $(call fs_config,$(zip_root)/ROOT,) > $(zip_root)/META/root_filesystem_config.txt
 endif
@@ -2735,6 +2884,7 @@
 		$(INSTALLED_BOOTIMAGE_TARGET) \
 		$(INSTALLED_USERDATAIMAGE_TARGET) \
 		$(INSTALLED_VENDORIMAGE_TARGET) \
+		$(INSTALLED_PRODUCTIMAGE_TARGET) \
 		$(updater_dep)
 endif
 $(SYMBOLS_ZIP): PRIVATE_LIST_FILE := $(call intermediates-dir-for,PACKAGING,symbols)/filelist
@@ -2757,7 +2907,8 @@
 $(COVERAGE_ZIP): $(INSTALLED_SYSTEMIMAGE) \
 		$(INSTALLED_BOOTIMAGE_TARGET) \
 		$(INSTALLED_USERDATAIMAGE_TARGET) \
-		$(INSTALLED_VENDORIMAGE_TARGET)
+		$(INSTALLED_VENDORIMAGE_TARGET) \
+		$(INSTALLED_PRODUCTIMAGE_TARGET)
 endif
 $(COVERAGE_ZIP): PRIVATE_LIST_FILE := $(call intermediates-dir-for,PACKAGING,coverage)/filelist
 $(COVERAGE_ZIP): $(SOONG_ZIP)
@@ -2857,6 +3008,15 @@
 vendorimage: $(INSTALLED_QEMU_VENDORIMAGE)
 droidcore: $(INSTALLED_QEMU_VENDORIMAGE)
 endif
+ifeq ($(BOARD_USES_PRODUCTIMAGE),true)
+INSTALLED_QEMU_PRODUCTIMAGE := $(PRODUCT_OUT)/product-qemu.img
+$(INSTALLED_QEMU_PRODUCTIMAGE): $(INSTALLED_PRODUCTIMAGE_TARGET) $(MK_QEMU_IMAGE_SH) $(SGDISK_HOST)
+	@echo Create product-qemu.img
+	(export SGDISK=$(SGDISK_HOST); $(MK_QEMU_IMAGE_SH) ${PRODUCT_OUT}/product.img)
+
+productimage: $(INSTALLED_QEMU_PRODUCTIMAGE)
+droidcore: $(INSTALLED_QEMU_PRODUCTIMAGE)
+endif
 endif
 # -----------------------------------------------------------------
 # The emulator package
diff --git a/core/base_rules.mk b/core/base_rules.mk
index 971c1ac..b4d8888 100644
--- a/core/base_rules.mk
+++ b/core/base_rules.mk
@@ -72,6 +72,8 @@
 LOCAL_OEM_MODULE := true
 else ifneq ($(filter $(TARGET_OUT_ODM)/%,$(_path)),)
 LOCAL_ODM_MODULE := true
+else ifneq ($(filter $(TARGET_OUT_PRODUCT)/%,$(_path)),)
+LOCAL_PRODUCT_MODULE := true
 endif
 _path :=
 
@@ -200,6 +202,8 @@
   partition_tag := _OEM
 else ifeq (true,$(LOCAL_ODM_MODULE))
   partition_tag := _ODM
+else ifeq (true,$(LOCAL_PRODUCT_MODULE))
+  partition_tag := _PRODUCT
 else ifeq (NATIVE_TESTS,$(LOCAL_MODULE_CLASS))
   partition_tag := _DATA
 else
diff --git a/core/clear_vars.mk b/core/clear_vars.mk
index 5101e73..7d3fa75 100644
--- a/core/clear_vars.mk
+++ b/core/clear_vars.mk
@@ -197,6 +197,7 @@
 LOCAL_PREBUILT_STRIP_COMMENTS:=
 LOCAL_PRIVILEGED_MODULE:=
 # '',full,custom,disabled,obfuscation,optimization
+LOCAL_PRODUCT_MODULE:=
 LOCAL_PROGUARD_ENABLED:=
 LOCAL_PROGUARD_FLAG_FILES:=
 LOCAL_PROGUARD_FLAGS:=
diff --git a/core/config.mk b/core/config.mk
index f4ce3c0..9ff43e8 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -987,6 +987,7 @@
     cacheimage-nodeps \
     bptimage-nodeps \
     vnod vendorimage-nodeps \
+    pnod productimage-nodeps \
     systemotherimage-nodeps \
     ramdisk-nodeps \
     bootimage-nodeps \
diff --git a/core/envsetup.mk b/core/envsetup.mk
index f339b2f..6a7fbd1 100644
--- a/core/envsetup.mk
+++ b/core/envsetup.mk
@@ -179,6 +179,7 @@
 TARGET_COPY_OUT_ASAN := $(TARGET_COPY_OUT_DATA)/asan
 TARGET_COPY_OUT_OEM := oem
 TARGET_COPY_OUT_ODM := odm
+TARGET_COPY_OUT_PRODUCT := product
 TARGET_COPY_OUT_ROOT := root
 TARGET_COPY_OUT_RECOVERY := recovery
 
@@ -198,6 +199,17 @@
 TARGET_COPY_OUT_VENDOR := $(_vendor_path_placeholder)
 ###########################################
 
+###########################################
+# Define TARGET_COPY_OUT_PRODUCT to a placeholder, for at this point
+# we don't know if the device wants to build a separate product.img
+# or just build product stuff into system.img.
+# A device can set up TARGET_COPY_OUT_PRODUCT to "product" in its
+# BoardConfig.mk.
+# We'll substitute with the real value after loading BoardConfig.mk.
+_product_path_placeholder := ||PRODUCT-PATH-PH||
+TARGET_COPY_OUT_PRODUCT := $(_product_path_placeholder)
+###########################################
+
 #################################################################
 # Set up minimal BOOTCLASSPATH list of jars to build/execute
 # java code with dalvikvm/art.
@@ -273,6 +285,29 @@
 else ifdef BOARD_USES_VENDORIMAGE
 $(error TARGET_COPY_OUT_VENDOR must be set to 'vendor' to use a vendor image)
 endif
+
+###########################################
+# Now we can substitute with the real value of TARGET_COPY_OUT_PRODUCT
+ifeq ($(TARGET_COPY_OUT_PRODUCT),$(_product_path_placeholder))
+TARGET_COPY_OUT_PRODUCT := system/product
+else ifeq ($(filter product system/product,$(TARGET_COPY_OUT_PRODUCT)),)
+$(error TARGET_COPY_OUT_PRODUCT must be either 'product' or 'system/product', seeing '$(TARGET_COPY_OUT_PRODUCT)'.)
+endif
+PRODUCT_COPY_FILES := $(subst $(_product_path_placeholder),$(TARGET_COPY_OUT_PRODUCT),$(PRODUCT_COPY_FILES))
+
+BOARD_USES_PRODUCTIMAGE :=
+ifdef BOARD_PREBUILT_PRODUCTIMAGE
+BOARD_USES_PRODUCTIMAGE := true
+endif
+ifdef BOARD_PRODUCTIMAGE_FILE_SYSTEM_TYPE
+BOARD_USES_PRODUCTIMAGE := true
+endif
+ifeq ($(TARGET_COPY_OUT_PRODUCT),product)
+BOARD_USES_PRODUCTIMAGE := true
+else ifdef BOARD_USES_PRODUCTIMAGE
+$(error TARGET_COPY_OUT_PRODUCT must be set to 'product' to use a product image)
+endif
+
 ###########################################
 # Ensure that only TARGET_RECOVERY_UPDATER_LIBS *or* AB_OTA_UPDATER is set.
 TARGET_RECOVERY_UPDATER_LIBS ?=
@@ -625,6 +660,39 @@
 endif
 $(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_OUT_ODM_APPS := $(TARGET_OUT_ODM_APPS)
 
+TARGET_OUT_PRODUCT := $(PRODUCT_OUT)/$(TARGET_COPY_OUT_PRODUCT)
+ifneq ($(filter address,$(SANITIZE_TARGET)),)
+target_out_product_shared_libraries_base := $(PRODUCT_OUT)/$(TARGET_COPY_OUT_ASAN)/system
+ifeq ($(SANITIZE_LITE),true)
+# When using SANITIZE_LITE, APKs must not be packaged with sanitized libraries, as they will not
+# work with unsanitized app_process. For simplicity, generate APKs into /data/asan/.
+target_out_product_app_base := $(PRODUCT_OUT)/$(TARGET_COPY_OUT_ASAN)/product
+else
+target_out_product_app_base := $(TARGET_OUT_PRODUCT)
+endif
+else
+target_out_product_shared_libraries_base := $(TARGET_OUT)
+target_out_product_app_base := $(TARGET_OUT_PRODUCT)
+endif
+
+ifeq ($(TARGET_IS_64_BIT),true)
+TARGET_OUT_PRODUCT_SHARED_LIBRARIES := $(target_out_product_shared_libraries_base)/lib64
+else
+TARGET_OUT_PRODUCT_SHARED_LIBRARIES := $(target_out_product_shared_libraries_base)/lib
+endif
+TARGET_OUT_PRODUCT_JAVA_LIBRARIES:= $(TARGET_OUT_PRODUCT)/framework
+TARGET_OUT_PRODUCT_APPS := $(target_out_product_app_base)/app
+TARGET_OUT_PRODUCT_APPS_PRIVILEGED := $(target_out_product_app_base)/priv-app
+TARGET_OUT_PRODUCT_ETC := $(TARGET_OUT_PRODUCT)/etc
+
+ifeq ($(TARGET_TRANSLATE_2ND_ARCH),true)
+$(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_OUT_PRODUCT_SHARED_LIBRARIES := $(target_out_product_shared_libraries_base)/lib/$(TARGET_2ND_ARCH)
+else
+$(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_OUT_PRODUCT_SHARED_LIBRARIES := $(target_out_product_shared_libraries_base)/lib
+endif
+$(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_OUT_PRODUCT_APPS := $(TARGET_OUT_PRODUCT_APPS)
+$(TARGET_2ND_ARCH_VAR_PREFIX)TARGET_OUT_PRODUCT_APPS_PRIVILEGED := $(TARGET_OUT_PRODUCT_APPS_PRIVILEGED)
+
 TARGET_OUT_BREAKPAD := $(PRODUCT_OUT)/breakpad
 
 TARGET_OUT_UNSTRIPPED := $(PRODUCT_OUT)/symbols
diff --git a/core/main.mk b/core/main.mk
index 158b291..6fb9ede 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -1043,6 +1043,9 @@
 .PHONY: vendorimage
 vendorimage: $(INSTALLED_VENDORIMAGE_TARGET)
 
+.PHONY: productimage
+productimage: $(INSTALLED_PRODUCTIMAGE_TARGET)
+
 .PHONY: systemotherimage
 systemotherimage: $(INSTALLED_SYSTEMOTHERIMAGE_TARGET)
 
@@ -1066,9 +1069,11 @@
 	$(INSTALLED_CACHEIMAGE_TARGET) \
 	$(INSTALLED_BPTIMAGE_TARGET) \
 	$(INSTALLED_VENDORIMAGE_TARGET) \
+	$(INSTALLED_PRODUCTIMAGE_TARGET) \
 	$(INSTALLED_SYSTEMOTHERIMAGE_TARGET) \
 	$(INSTALLED_FILES_FILE) \
 	$(INSTALLED_FILES_FILE_VENDOR) \
+	$(INSTALLED_FILES_FILE_PRODUCT) \
 	$(INSTALLED_FILES_FILE_SYSTEMOTHER) \
 	soong_docs
 
@@ -1134,6 +1139,7 @@
     $(COVERAGE_ZIP) \
     $(INSTALLED_FILES_FILE) \
     $(INSTALLED_FILES_FILE_VENDOR) \
+    $(INSTALLED_FILES_FILE_PRODUCT) \
     $(INSTALLED_FILES_FILE_SYSTEMOTHER) \
     $(INSTALLED_BUILD_PROP_TARGET) \
     $(BUILT_TARGET_FILES_PACKAGE) \
diff --git a/core/package_internal.mk b/core/package_internal.mk
index cdc4958..4890966 100644
--- a/core/package_internal.mk
+++ b/core/package_internal.mk
@@ -111,6 +111,8 @@
         enforce_rro_enabled :=
       else ifeq (true,$(LOCAL_ODM_MODULE))
         enforce_rro_enabled :=
+      else ifeq (true,$(LOCAL_PRODUCT_MODULE))
+        enforce_rro_enabled :=
       endif
     else ifeq ($(filter $(TARGET_OUT)/%,$(LOCAL_MODULE_PATH)),)
       enforce_rro_enabled :=
diff --git a/core/product-graph.mk b/core/product-graph.mk
index 666a207..576d14d 100644
--- a/core/product-graph.mk
+++ b/core/product-graph.mk
@@ -104,6 +104,7 @@
 	$(hide) echo 'PRODUCT_PROPERTY_OVERRIDES=$$(PRODUCTS.$(strip $(1)).PRODUCT_PROPERTY_OVERRIDES)' >> $$@
 	$(hide) echo 'PRODUCT_DEFAULT_PROPERTY_OVERRIDES=$$(PRODUCTS.$(strip $(1)).PRODUCT_DEFAULT_PROPERTY_OVERRIDES)' >> $$@
 	$(hide) echo 'PRODUCT_SYSTEM_DEFAULT_PROPERTIES=$$(PRODUCTS.$(strip $(1)).PRODUCT_SYSTEM_DEFAULT_PROPERTIES)' >> $$@
+	$(hide) echo 'PRODUCT_PRODUCT_PROPERTIES=$$(PRODUCTS.$(strip $(1)).PRODUCT_PRODUCT_PROPERTIES)' >> $$@
 	$(hide) echo 'PRODUCT_CHARACTERISTICS=$$(PRODUCTS.$(strip $(1)).PRODUCT_CHARACTERISTICS)' >> $$@
 	$(hide) echo 'PRODUCT_COPY_FILES=$$(PRODUCTS.$(strip $(1)).PRODUCT_COPY_FILES)' >> $$@
 	$(hide) echo 'PRODUCT_OTA_PUBLIC_KEYS=$$(PRODUCTS.$(strip $(1)).PRODUCT_OTA_PUBLIC_KEYS)' >> $$@
diff --git a/core/product.mk b/core/product.mk
index 77f78a6..8095b27 100644
--- a/core/product.mk
+++ b/core/product.mk
@@ -88,6 +88,7 @@
     PRODUCT_BRAND \
     PRODUCT_PROPERTY_OVERRIDES \
     PRODUCT_DEFAULT_PROPERTY_OVERRIDES \
+    PRODUCT_PRODUCT_PROPERTIES \
     PRODUCT_CHARACTERISTICS \
     PRODUCT_COPY_FILES \
     PRODUCT_OTA_PUBLIC_KEYS \
@@ -125,6 +126,7 @@
     PRODUCT_VERITY_SIGNING_KEY \
     PRODUCT_SYSTEM_VERITY_PARTITION \
     PRODUCT_VENDOR_VERITY_PARTITION \
+    PRODUCT_PRODUCT_VERITY_PARTITION \
     PRODUCT_SYSTEM_SERVER_DEBUG_INFO \
     PRODUCT_DEX_PREOPT_MODULE_CONFIGS \
     PRODUCT_DEX_PREOPT_DEFAULT_FLAGS \
@@ -136,6 +138,7 @@
     PRODUCT_SANITIZER_MODULE_CONFIGS \
     PRODUCT_SYSTEM_BASE_FS_PATH \
     PRODUCT_VENDOR_BASE_FS_PATH \
+    PRODUCT_PRODUCT_BASE_FS_PATH \
     PRODUCT_SHIPPING_API_LEVEL \
     VENDOR_PRODUCT_RESTRICT_VENDOR_FILES \
     VENDOR_EXCEPTION_MODULES \
@@ -304,6 +307,8 @@
 	BOARD_FLASH_BLOCK_SIZE \
 	BOARD_VENDORIMAGE_PARTITION_SIZE \
 	BOARD_VENDORIMAGE_FILE_SYSTEM_TYPE \
+	BOARD_PRODUCTIMAGE_PARTITION_SIZE \
+	BOARD_PRODUCTIMAGE_FILE_SYSTEM_TYPE \
 	BOARD_INSTALLER_CMDLINE \
 
 
diff --git a/core/product_config.mk b/core/product_config.mk
index 3cd2f23..bf607bb 100644
--- a/core/product_config.mk
+++ b/core/product_config.mk
@@ -365,6 +365,13 @@
     $(strip $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SYSTEM_DEFAULT_PROPERTIES))
 .KATI_READONLY := PRODUCT_SYSTEM_DEFAULT_PROPERTIES
 
+# A list of property assignments, like "key = value", with zero or more
+# whitespace characters on either side of the '='.
+# used for adding properties to build.prop of product partition
+PRODUCT_PRODUCT_PROPERTIES := \
+    $(strip $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_PRODUCT_PROPERTIES))
+.KATI_READONLY := PRODUCT_PRODUCT_PROPERTIES
+
 # Should we use the default resources or add any product specific overlays
 PRODUCT_PACKAGE_OVERLAYS := \
     $(strip $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_PACKAGE_OVERLAYS))
diff --git a/core/soong_config.mk b/core/soong_config.mk
index 2fa7ad4..639b019 100644
--- a/core/soong_config.mk
+++ b/core/soong_config.mk
@@ -124,7 +124,7 @@
 $(call add_json_bool, Uml,                               $(filter true,$(TARGET_USER_MODE_LINUX)))
 $(call add_json_str,  VendorPath,                        $(TARGET_COPY_OUT_VENDOR))
 $(call add_json_str,  OdmPath,                           $(TARGET_COPY_OUT_ODM))
-$(call add_json_str,  OemPath,                           $(TARGET_COPY_OUT_OEM))
+$(call add_json_str,  ProductPath,                       $(TARGET_COPY_OUT_PRODUCT))
 $(call add_json_bool, MinimizeJavaDebugInfo,             $(filter true,$(PRODUCT_MINIMIZE_JAVA_DEBUG_INFO)))
 
 $(call add_json_bool, UseGoma,                           $(filter-out false,$(USE_GOMA)))
diff --git a/help.sh b/help.sh
index 3f39c77..c143542 100755
--- a/help.sh
+++ b/help.sh
@@ -38,6 +38,8 @@
                             Stands for "System, NO Dependencies"
     vnod                    Quickly rebuild the vendor image from built packages
                             Stands for "Vendor, NO Dependencies"
+    pnod                    Quickly rebuild the product image from built packages
+                            Stands for "Product, NO Dependencies"
 
 
 So, for example, you could run:
diff --git a/tools/releasetools/add_img_to_target_files.py b/tools/releasetools/add_img_to_target_files.py
index a9863bc..240e5c9 100755
--- a/tools/releasetools/add_img_to_target_files.py
+++ b/tools/releasetools/add_img_to_target_files.py
@@ -75,7 +75,7 @@
 
 
 # Partitions that should have their care_map added to META/care_map.txt.
-PARTITIONS_WITH_CARE_MAP = ('system', 'vendor')
+PARTITIONS_WITH_CARE_MAP = ('system', 'vendor', 'product')
 
 
 class OutputFile(object):
@@ -172,6 +172,20 @@
   return img.name
 
 
+def AddProduct(output_zip, prefix="IMAGES/"):
+  """Turn the contents of PRODUCT into a product image and store it in output_zip."""
+
+  img = OutputFile(output_zip, OPTIONS.input_tmp, prefix, "product.img")
+  if os.path.exists(img.input_name):
+    print("product.img already exists in %s, no need to rebuild..." % (prefix,))
+    return img.input_name
+
+  block_list = OutputFile(output_zip, OPTIONS.input_tmp, prefix, "product.map")
+  CreateImage(OPTIONS.input_tmp, OPTIONS.info_dict, "product", img,
+              block_list=block_list)
+  return img.name
+
+
 def AddDtbo(output_zip, prefix="IMAGES/"):
   """Adds the DTBO image.
 
@@ -621,13 +635,16 @@
       print("target_files appears to already contain images.")
       sys.exit(1)
 
-  # vendor.img is unlike system.img or system_other.img. Because it could be
-  # built from source, or dropped into target_files.zip as a prebuilt blob. We
-  # consider either of them as vendor.img being available, which could be used
-  # when generating vbmeta.img for AVB.
+  # {vendor,product}.img is unlike system.img or system_other.img. Because it could
+  # be built from source, or dropped into target_files.zip as a prebuilt blob.
+  # We consider either of them as {vendor,product}.img being available, which could
+  # be used when generating vbmeta.img for AVB.
   has_vendor = (os.path.isdir(os.path.join(OPTIONS.input_tmp, "VENDOR")) or
                 os.path.exists(os.path.join(OPTIONS.input_tmp, "IMAGES",
                                             "vendor.img")))
+  has_product = (os.path.isdir(os.path.join(OPTIONS.input_tmp, "PRODUCT")) or
+                 os.path.exists(os.path.join(OPTIONS.input_tmp, "IMAGES",
+                                             "product.img")))
   has_system_other = os.path.isdir(os.path.join(OPTIONS.input_tmp,
                                                 "SYSTEM_OTHER"))
 
@@ -715,6 +732,10 @@
     banner("vendor")
     partitions['vendor'] = AddVendor(output_zip)
 
+  if has_product:
+    banner("product")
+    partitions['product'] = AddProduct(output_zip)
+
   if has_system_other:
     banner("system_other")
     AddSystemOther(output_zip)
diff --git a/tools/releasetools/build_image.py b/tools/releasetools/build_image.py
index f07e4b1..123ec7c 100755
--- a/tools/releasetools/build_image.py
+++ b/tools/releasetools/build_image.py
@@ -778,6 +778,22 @@
     copy_prop("vendor_squashfs_disable_4k_align", "squashfs_disable_4k_align")
     copy_prop("vendor_base_fs_file", "base_fs_file")
     copy_prop("vendor_extfs_inode_count", "extfs_inode_count")
+  elif mount_point == "product":
+    copy_prop("avb_product_hashtree_enable", "avb_hashtree_enable")
+    copy_prop("avb_product_add_hashtree_footer_args",
+              "avb_add_hashtree_footer_args")
+    copy_prop("avb_product_key_path", "avb_key_path")
+    copy_prop("avb_product_algorithm", "avb_algorithm")
+    copy_prop("product_fs_type", "fs_type")
+    copy_prop("product_size", "partition_size")
+    copy_prop("product_journal_size", "journal_size")
+    copy_prop("product_verity_block_device", "verity_block_device")
+    copy_prop("product_squashfs_compressor", "squashfs_compressor")
+    copy_prop("product_squashfs_compressor_opt", "squashfs_compressor_opt")
+    copy_prop("product_squashfs_block_size", "squashfs_block_size")
+    copy_prop("product_squashfs_disable_4k_align", "squashfs_disable_4k_align")
+    copy_prop("product_base_fs_file", "base_fs_file")
+    copy_prop("product_extfs_inode_count", "extfs_inode_count")
   elif mount_point == "oem":
     copy_prop("fs_type", "fs_type")
     copy_prop("oem_size", "partition_size")
@@ -831,6 +847,8 @@
       mount_point = "vendor"
     elif image_filename == "oem.img":
       mount_point = "oem"
+    elif image_filename == "product.img":
+      mount_point = "product"
     else:
       print("error: unknown image file name ", image_filename, file=sys.stderr)
       sys.exit(1)
diff --git a/tools/releasetools/common.py b/tools/releasetools/common.py
index faadae9..632cc11 100644
--- a/tools/releasetools/common.py
+++ b/tools/releasetools/common.py
@@ -78,7 +78,7 @@
 
 
 # The partitions allowed to be signed by AVB (Android verified boot 2.0).
-AVB_PARTITIONS = ('boot', 'recovery', 'system', 'vendor', 'dtbo')
+AVB_PARTITIONS = ('boot', 'recovery', 'system', 'vendor', 'product', 'dtbo')
 
 
 class ErrorCode(object):