diff --git a/core/Makefile b/core/Makefile
index 9eb36ea..2d30e34 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -2919,27 +2919,20 @@
 # BOARD_SUPER_PARTITION_SIZE must be defined to build super image.
 ifneq ($(BOARD_SUPER_PARTITION_SIZE),)
 
-INSTALLED_SUPERIMAGE_TARGET := $(PRODUCT_OUT)/super.img
-INSTALLED_SUPERIMAGE_EMPTY_TARGET := $(PRODUCT_OUT)/super_empty.img
-
-$(INSTALLED_SUPERIMAGE_TARGET): $(call images-for-partitions,$(BOARD_SUPER_PARTITION_PARTITION_LIST))
-
-# For A/B devices, super partition always contains sub-partitions in the _a slot, because this
-# image should only be used for bootstrapping / initializing the device. When flashing the image,
-# bootloader fastboot should always mark _a slot as bootable.
-ifeq ($(AB_OTA_UPDATER),true)
-$(INSTALLED_SUPERIMAGE_TARGET) $(INSTALLED_SUPERIMAGE_EMPTY_TARGET): PRIVATE_PARTITION_SUFFIX=_a
-endif # AB_OTA_UPDATER
-
-$(INSTALLED_SUPERIMAGE_TARGET) $(INSTALLED_SUPERIMAGE_EMPTY_TARGET): $(LPMAKE)
+define super-slot-suffix
+$(if $(filter true,$(AB_OTA_UPDATER)),$(if $(filter true,$(PRODUCT_RETROFIT_DYNAMIC_PARTITIONS)),,_a))
+endef
 
 # $(1): slot A suffix (_a or empty)
 # $(2): include images or not (true or empty)
 define build-superimage-target-args
   $(if $(2), --sparse) \
   --metadata-size 65536 \
-  --metadata-slots $(if $(1),2,1) \
-  --device-size $(BOARD_SUPER_PARTITION_SIZE) \
+  --metadata-slots $(if $(filter true,$(AB_OTA_UPDATER)),2,1) \
+  --super-name $(BOARD_SUPER_PARTITION_METADATA_DEVICE) \
+  $(if $(filter true,$(PRODUCT_RETROFIT_DYNAMIC_PARTITIONS)), $(if $(filter true,$(AB_OTA_UPDATER)), --auto-slot-suffixing)) \
+  $(foreach device,$(BOARD_SUPER_PARTITION_BLOCK_DEVICES), \
+    --device $(device):$(BOARD_SUPER_PARTITION_$(call to-upper,$(device))_DEVICE_SIZE)) \
   $(foreach group,$(BOARD_SUPER_PARTITION_GROUPS), \
     --group $(group)$(1):$(BOARD_$(call to-upper,$(group))_SIZE) \
     $(if $(1), --group $(group)_b:$(BOARD_$(call to-upper,$(group))_SIZE)) \
@@ -2959,15 +2952,23 @@
     --output $(1)
 endef
 
-$(INSTALLED_SUPERIMAGE_TARGET):
+# For A/B devices, super partition always contains sub-partitions in the _a slot, because this
+# image should only be used for bootstrapping / initializing the device. When flashing the image,
+# bootloader fastboot should always mark _a slot as bootable.
+
+ifneq (true,$(PRODUCT_RETROFIT_DYNAMIC_PARTITIONS))
+INSTALLED_SUPERIMAGE_TARGET := $(PRODUCT_OUT)/super.img
+$(INSTALLED_SUPERIMAGE_TARGET): $(LPMAKE) $(call images-for-partitions,$(BOARD_SUPER_PARTITION_PARTITION_LIST))
 	$(call pretty,"Target super fs image: $@")
-	$(call build-superimage-target,$@,$(PRIVATE_PARTITION_SUFFIX),true)
+	$(call build-superimage-target,$@,$(call super-slot-suffix),true)
+endif
 
 $(call dist-for-goals,dist_files,$(INSTALLED_SUPERIMAGE_TARGET))
 
-$(INSTALLED_SUPERIMAGE_EMPTY_TARGET):
+INSTALLED_SUPERIMAGE_EMPTY_TARGET := $(PRODUCT_OUT)/super_empty.img
+$(INSTALLED_SUPERIMAGE_EMPTY_TARGET): $(LPMAKE)
 	$(call pretty,"Target empty super fs image: $@")
-	$(call build-superimage-target,$@,$(PRIVATE_PARTITION_SUFFIX))
+	$(call build-superimage-target,$@,$(call super-slot-suffix))
 
 $(call dist-for-goals,dist_files,$(INSTALLED_SUPERIMAGE_EMPTY_TARGET))
 
@@ -2989,6 +2990,25 @@
 # Add image dependencies so that generated_*_image_info.txt are written before checking.
 check-all-partition-sizes: $(call images-for-partitions,$(BOARD_SUPER_PARTITION_PARTITION_LIST))
 
+ifeq ($(PRODUCT_RETROFIT_DYNAMIC_PARTITIONS),true)
+# Check sum(super partition block devices) == super partition (/ 2 for A/B)
+# Non-retrofit devices already defines BOARD_SUPER_PARTITION_SUPER_DEVICE_SIZE = BOARD_SUPER_PARTITION_SIZE
+define check-super-partition-size
+  size_list="$(foreach device,$(call to-upper,$(BOARD_SUPER_PARTITION_BLOCK_DEVICES)),$(BOARD_SUPER_PARTITION_$(device)_DEVICE_SIZE))"; \
+  sum_sizes_expr=$$(sed -e 's/ /+/g' <<< "$${size_list}"); \
+  max_size_tail=$(if $(filter true,$(AB_OTA_UPDATER))," / 2"); \
+  max_size_expr="$(BOARD_SUPER_PARTITION_SIZE)$${max_size_tail}"; \
+  if [ $$(( $${sum_sizes_expr} )) -ne $$(( $${max_size_expr} )) ]; then \
+    echo "The sum of super partition block device sizes is not equal to BOARD_SUPER_PARTITION_SIZE$${max_size_tail}:"; \
+    echo $${sum_sizes_expr} '!=' $${max_size_expr}; \
+    exit 1; \
+  else \
+    echo "The sum of super partition block device sizes is equal to BOARD_SUPER_PARTITION_SIZE$${max_size_tail}:"; \
+    echo $${sum_sizes_expr} '==' $${max_size_expr}; \
+  fi
+endef
+endif
+
 # $(1): human-readable max size string
 # $(2): max size expression
 # $(3): list of partition names
@@ -3035,6 +3055,7 @@
 
 check-all-partition-sizes check-all-partition-sizes-nodeps:
 	$(call check-all-partition-sizes-target)
+	$(call check-super-partition-size)
 
 endif # PRODUCT_BUILD_SUPER_PARTITION
 
@@ -3658,7 +3679,7 @@
 	$(hide) echo "super_size=$(BOARD_SUPER_PARTITION_SIZE)" >> $(zip_root)/META/misc_info.txt
 	$(hide) echo "lpmake=$(notdir $(LPMAKE))" >> $(zip_root)/META/misc_info.txt
 	$(hide) echo -n "lpmake_args=" >> $(zip_root)/META/misc_info.txt
-	$(hide) echo $(call build-superimage-target-args,$(if $(filter true,$(AB_OTA_UPDATER)),_a,)) \
+	$(hide) echo $(call build-superimage-target-args,$(call super-slot-suffix)) \
 	    >> $(zip_root)/META/misc_info.txt
 endif
 ifneq ($(BOARD_SUPER_PARTITION_GROUPS),)
diff --git a/core/config.mk b/core/config.mk
index e44af56..54bc1b7 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -932,6 +932,19 @@
 endif
 .KATI_READONLY := PRODUCT_OTA_ENFORCE_VINTF_KERNEL_REQUIREMENTS
 
+ifeq ($(PRODUCT_RETROFIT_DYNAMIC_PARTITIONS),true)
+  ifneq ($(PRODUCT_USE_DYNAMIC_PARTITIONS),true)
+    $(error PRODUCT_USE_DYNAMIC_PARTITIONS must be true when PRODUCT_RETROFIT_DYNAMIC_PARTITIONS \
+        is set)
+  endif
+  ifdef PRODUCT_SHIPPING_API_LEVEL
+    ifeq (true,$(call math_gt_or_eq,$(PRODUCT_SHIPPING_API_LEVEL),29))
+      $(error Devices with shipping API level $(PRODUCT_SHIPPING_API_LEVEL) must not set \
+          PRODUCT_RETROFIT_DYNAMIC_PARTITIONS)
+    endif
+  endif
+endif
+
 ifeq ($(PRODUCT_USE_DYNAMIC_PARTITIONS),true)
     requirements := \
         PRODUCT_USE_DYNAMIC_PARTITION_SIZE \
@@ -1021,6 +1034,48 @@
         $(BOARD_$(group)_PARTITION_LIST))
 .KATI_READONLY := BOARD_SUPER_PARTITION_PARTITION_LIST
 
+ifdef BOARD_SUPER_PARTITION_SIZE
+ifeq ($(PRODUCT_RETROFIT_DYNAMIC_PARTITIONS),true)
+
+# The metadata device must be specified manually for retrofitting.
+ifndef BOARD_SUPER_PARTITION_METADATA_DEVICE
+$(error Must specify BOARD_SUPER_PARTITION_METADATA_DEVICE if BOARD_SUPER_PARTITION_BLOCK_DEVICES is used.)
+endif
+
+# The metadata device must be included in the super partition block device list.
+ifeq (,$(filter $(BOARD_SUPER_PARTITION_METADATA_DEVICE),$(BOARD_SUPER_PARTITION_BLOCK_DEVICES)))
+$(error BOARD_SUPER_PARTITION_METADATA_DEVICE is not listed in BOARD_SUPER_PARTITION_BLOCK_DEVICES.)
+endif
+
+# The metadata device must be supplied to init via the kernel command-line.
+BOARD_KERNEL_CMDLINE += androidboot.super_partition=$(BOARD_SUPER_PARTITION_METADATA_DEVICE)
+
+else # PRODUCT_RETROFIT_DYNAMIC_PARTITIONS
+
+# These should not be specified on devices launching with dynamic partition support.
+ifdef BOARD_SUPER_PARTITION_BLOCK_DEVICES
+$(error BOARD_SUPER_PARTITION_BLOCK_DEVICES can only be used if PRODUCT_RETROFIT_DYNAMIC_PARTITIONS is true.)
+endif
+ifdef BOARD_SUPER_PARTITION_METADATA_DEVICE
+$(error BOARD_SUPER_PARTITION_METADATA_DEVICE can only be used if PRODUCT_RETROFIT_DYNAMIC_PARTITIONS is true.)
+endif
+
+# For normal devices, we populate BOARD_SUPER_PARTITION_BLOCK_DEVICES so the
+# build can handle both cases consistently.
+BOARD_SUPER_PARTITION_BLOCK_DEVICES := super
+BOARD_SUPER_PARTITION_METADATA_DEVICE := super
+BOARD_SUPER_PARTITION_SUPER_DEVICE_SIZE := $(BOARD_SUPER_PARTITION_SIZE)
+
+endif # PRODUCT_RETROFIT_DYNAMIC_PARTITIONS
+endif # BOARD_SUPER_PARTITION_SIZE
+.KATI_READONLY := BOARD_SUPER_PARTITION_BLOCK_DEVICES
+.KATI_READONLY := BOARD_SUPER_PARTITION_METADATA_DEVICE
+
+$(foreach device,$(call to-upper,$(BOARD_SUPER_PARTITION_BLOCK_DEVICES)), \
+    $(if $(BOARD_SUPER_PARTITION_$(device)_DEVICE_SIZE),, \
+        $(error $(BOARD_SUPER_PARTITION_$(device)_DEVICE_SIZE must not be empty))) \
+    $(eval .KATI_READONLY := BOARD_SUPER_PARTITION_$(device)_DEVICE_SIZE))
+
 endif # PRODUCT_BUILD_SUPER_PARTITION
 
 # ###############################################################
diff --git a/core/main.mk b/core/main.mk
index 915d4be..7125fc5 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -250,6 +250,7 @@
 ADDITIONAL_PRODUCT_PROPERTIES += \
     ro.boot.logical_partitions=$(PRODUCT_USE_DYNAMIC_PARTITIONS) \
     ro.boot.dynamic_partitions=$(PRODUCT_USE_DYNAMIC_PARTITIONS) \
+    ro.boot.dynamic_partitions_retrofit=$(PRODUCT_RETROFIT_DYNAMIC_PARTITIONS)
 
 # -----------------------------------------------------------------
 ###
diff --git a/core/product.mk b/core/product.mk
index 13cc319..661416c 100644
--- a/core/product.mk
+++ b/core/product.mk
@@ -211,6 +211,7 @@
     PRODUCT_BUILD_SUPER_PARTITION \
     PRODUCT_FORCE_PRODUCT_MODULES_TO_SYSTEM_PARTITION \
     PRODUCT_USE_DYNAMIC_PARTITIONS \
+    PRODUCT_RETROFIT_DYNAMIC_PARTITIONS \
 
 define dump-product
 $(info ==== $(1) ====)\
diff --git a/core/product_config.mk b/core/product_config.mk
index 22a13f3..5a727c4 100644
--- a/core/product_config.mk
+++ b/core/product_config.mk
@@ -514,10 +514,20 @@
     $(strip $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_ACTIONABLE_COMPATIBLE_PROPERTY_DISABLE))
 
 # Dynamic partition feature flags.
+
+# When this is true, dynamic partitions is retrofitted on a device that has
+# already been launched without dynamic partitions. Otherwise, the device
+# is launched with dynamic partitions.
+# This flag implies PRODUCT_USE_DYNAMIC_PARTITIONS.
+PRODUCT_RETROFIT_DYNAMIC_PARTITIONS := \
+    $(strip $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_RETROFIT_DYNAMIC_PARTITIONS))
+.KATI_READONLY := PRODUCT_RETROFIT_DYNAMIC_PARTITIONS
+
 # TODO(b/119286600): remove PRODUCT_USE_LOGICAL_PARTITIONS
 PRODUCT_USE_DYNAMIC_PARTITIONS := $(or \
     $(strip $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_USE_DYNAMIC_PARTITIONS)), \
-    $(strip $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_USE_LOGICAL_PARTITIONS)))
+    $(strip $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_USE_LOGICAL_PARTITIONS)), \
+    $(PRODUCT_RETROFIT_DYNAMIC_PARTITIONS))
 .KATI_READONLY := PRODUCT_USE_DYNAMIC_PARTITIONS
 
 # All requirements of PRODUCT_USE_DYNAMIC_PARTITIONS falls back to