diff --git a/target/board/generic_arm64_a/BoardConfig.mk b/target/board/generic_arm64_a/BoardConfig.mk
index e92f84d2c..472974473 100644
--- a/target/board/generic_arm64_a/BoardConfig.mk
+++ b/target/board/generic_arm64_a/BoardConfig.mk
@@ -14,40 +14,7 @@
 # limitations under the License.
 #
 
-# Common boardconfig settings for generic AOSP products targetting mobile
-# (phone/table) devices.
-
-# System properties
-TARGET_SYSTEM_PROP := build/make/target/board/treble_system.prop
-
-# Bootloader is not part of generic AOSP image
-TARGET_NO_BOOTLOADER := true
-
-# Kernel is also not part of generic AOSP image
-TARGET_NO_KERNEL := true
-
-# system.img is always ext4 with sparse option
-TARGET_USERIMAGES_USE_EXT4 := true
-TARGET_USERIMAGES_SPARSE_EXT_DISABLED := false
-TARGET_USES_MKE2FS := true
-
-# Enable dex pre-opt to speed up initial boot
-ifeq ($(HOST_OS),linux)
-  ifeq ($(WITH_DEXPREOPT),)
-    WITH_DEXPREOPT := true
-    WITH_DEXPREOPT_PIC := true
-    ifneq ($(TARGET_BUILD_VARIANT),user)
-      # Retain classes.dex in APK's for non-user builds
-      DEX_PREOPT_DEFAULT := nostripping
-    endif
-  endif
-endif
-
-# Generic AOSP image always requires separate vendor.img
-TARGET_COPY_OUT_VENDOR := vendor
-
-# Generic AOSP image does NOT support HWC1
-TARGET_USES_HWC2 := true
+include build/make/target/board/treble_common_64.mk
 
 TARGET_ARCH := arm64
 TARGET_ARCH_VARIANT := armv8-a
@@ -60,13 +27,3 @@ TARGET_2ND_ARCH_VARIANT := armv7-a-neon
 TARGET_2ND_CPU_ABI := armeabi-v7a
 TARGET_2ND_CPU_ABI2 := armeabi
 TARGET_2ND_CPU_VARIANT := generic
-
-TARGET_USES_64_BIT_BINDER := true
-
-BOARD_SYSTEMIMAGE_PARTITION_SIZE := 1610612736	# 1.5 GB
-
-# TODO(b/35790399): remove when b/35790399 is fixed.
-BOARD_NAND_SPARE_SIZE := 0
-BOARD_FLASH_BLOCK_SIZE := 512
-
-BOARD_PROPERTY_OVERRIDES_SPLIT_ENABLED := true
diff --git a/target/board/generic_arm64_ab/BoardConfig.mk b/target/board/generic_arm64_ab/BoardConfig.mk
index 83e44a5f7..56cc2da7d 100644
--- a/target/board/generic_arm64_ab/BoardConfig.mk
+++ b/target/board/generic_arm64_ab/BoardConfig.mk
@@ -14,41 +14,7 @@
 # limitations under the License.
 #
 
-# Common boardconfig settings for generic AOSP products targetting mobile
-# (phone/table) devices.
-
-# System properties
-TARGET_SYSTEM_PROP := build/make/target/board/treble_system.prop
-
-# Bootloader is not part of generic AOSP image
-TARGET_NO_BOOTLOADER := true
-
-# Kernel is also not part of generic AOSP image
-TARGET_NO_KERNEL := true
-
-# system.img is always ext4 with sparse option
-TARGET_USERIMAGES_USE_EXT4 := true
-TARGET_USERIMAGES_SPARSE_EXT_DISABLED := false
-TARGET_USES_MKE2FS := true
-
-# Enable dex pre-opt to speed up initial boot
-ifeq ($(HOST_OS),linux)
-  ifeq ($(WITH_DEXPREOPT),)
-    WITH_DEXPREOPT := true
-    WITH_DEXPREOPT_PIC := true
-    ifneq ($(TARGET_BUILD_VARIANT),user)
-      # Retain classes.dex in APK's for non-user builds
-      DEX_PREOPT_DEFAULT := nostripping
-    endif
-  endif
-endif
-
-# Generic AOSP image always requires separate vendor.img
-TARGET_COPY_OUT_VENDOR := vendor
-
-# Generic AOSP image does NOT support HWC1
-TARGET_USES_HWC2 := true
-NUM_FRAMEBUFFER_SURFACE_BUFFERS := 3
+include build/make/target/board/treble_common_64.mk
 
 TARGET_ARCH := arm64
 TARGET_ARCH_VARIANT := armv8-a
@@ -63,8 +29,6 @@ TARGET_2ND_CPU_ABI2 := armeabi
 # TODO(jiyong) can we set krait here?
 TARGET_2ND_CPU_VARIANT := cortex-a15
 
-TARGET_USES_64_BIT_BINDER := true
-
 # Enable A/B update
 TARGET_NO_RECOVERY := true
 BOARD_BUILD_SYSTEM_ROOT_IMAGE := true
@@ -73,16 +37,6 @@ BOARD_BUILD_SYSTEM_ROOT_IMAGE := true
 BOARD_ROOT_EXTRA_FOLDERS := bt_firmware firmware firmware/radio persist
 BOARD_ROOT_EXTRA_SYMLINKS := /vendor/lib/dsp:/dsp
 
-# TODO(b/35603549): this is currently set to 2.5GB to support sailfish/marlin
-# Fix this!
-BOARD_SYSTEMIMAGE_PARTITION_SIZE := 2147483648
-
-# TODO(b/35790399): remove when b/35790399 is fixed.
-BOARD_NAND_SPARE_SIZE := 0
-BOARD_FLASH_BLOCK_SIZE := 512
-
-BOARD_PROPERTY_OVERRIDES_SPLIT_ENABLED := true
-
 # TODO(b/36764215): remove this setting when the generic system image
 # no longer has QCOM-specific directories under /.
 BOARD_SEPOLICY_DIRS += build/target/board/generic_arm64_ab/sepolicy
diff --git a/target/board/generic_arm_a/BoardConfig.mk b/target/board/generic_arm_a/BoardConfig.mk
index 03912485a..57a5196a9 100644
--- a/target/board/generic_arm_a/BoardConfig.mk
+++ b/target/board/generic_arm_a/BoardConfig.mk
@@ -14,51 +14,10 @@
 # limitations under the License.
 #
 
-# Common boardconfig settings for generic AOSP products targetting mobile
-# (phone/table) devices.
-
-# System properties
-TARGET_SYSTEM_PROP := build/make/target/board/treble_system.prop
-
-# Bootloader is not part of generic AOSP image
-TARGET_NO_BOOTLOADER := true
-
-# Kernel is also not part of generic AOSP image
-TARGET_NO_KERNEL := true
-
-# system.img is always ext4 with sparse option
-TARGET_USERIMAGES_USE_EXT4 := true
-TARGET_USERIMAGES_SPARSE_EXT_DISABLED := false
-TARGET_USES_MKE2FS := true
-
-# Enable dex pre-opt to speed up initial boot
-ifeq ($(HOST_OS),linux)
-  ifeq ($(WITH_DEXPREOPT),)
-    WITH_DEXPREOPT := true
-    WITH_DEXPREOPT_PIC := true
-    ifneq ($(TARGET_BUILD_VARIANT),user)
-      # Retain classes.dex in APK's for non-user builds
-      DEX_PREOPT_DEFAULT := nostripping
-    endif
-  endif
-endif
-
-# Generic AOSP image always requires separate vendor.img
-TARGET_COPY_OUT_VENDOR := vendor
-
-# Generic AOSP image does NOT support HWC1
-TARGET_USES_HWC2 := true
+include build/make/target/board/treble_common_32.mk
 
 TARGET_ARCH := arm
 TARGET_ARCH_VARIANT := armv7-a-neon
 TARGET_CPU_ABI := armeabi-v7a
 TARGET_CPU_ABI2 := armeabi
 TARGET_CPU_VARIANT := generic
-
-BOARD_SYSTEMIMAGE_PARTITION_SIZE := 1610612736
-
-# TODO(b/35790399): remove when b/35790399 is fixed.
-BOARD_NAND_SPARE_SIZE := 0
-BOARD_FLASH_BLOCK_SIZE := 512
-
-BOARD_PROPERTY_OVERRIDES_SPLIT_ENABLED := true
diff --git a/target/board/generic_arm_ab/BoardConfig.mk b/target/board/generic_arm_ab/BoardConfig.mk
index 58d597b2f..ae8de1468 100644
--- a/target/board/generic_arm_ab/BoardConfig.mk
+++ b/target/board/generic_arm_ab/BoardConfig.mk
@@ -14,40 +14,7 @@
 # limitations under the License.
 #
 
-# Common boardconfig settings for generic AOSP products targetting mobile
-# (phone/table) devices.
-
-# System properties
-TARGET_SYSTEM_PROP := build/make/target/board/treble_system.prop
-
-# Bootloader is not part of generic AOSP image
-TARGET_NO_BOOTLOADER := true
-
-# Kernel is also not part of generic AOSP image
-TARGET_NO_KERNEL := true
-
-# system.img is always ext4 with sparse option
-TARGET_USERIMAGES_USE_EXT4 := true
-TARGET_USERIMAGES_SPARSE_EXT_DISABLED := false
-TARGET_USES_MKE2FS := true
-
-# Enable dex pre-opt to speed up initial boot
-ifeq ($(HOST_OS),linux)
-  ifeq ($(WITH_DEXPREOPT),)
-    WITH_DEXPREOPT := true
-    WITH_DEXPREOPT_PIC := true
-    ifneq ($(TARGET_BUILD_VARIANT),user)
-      # Retain classes.dex in APK's for non-user builds
-      DEX_PREOPT_DEFAULT := nostripping
-    endif
-  endif
-endif
-
-# Generic AOSP image always requires separate vendor.img
-TARGET_COPY_OUT_VENDOR := vendor
-
-# Generic AOSP image does NOT support HWC1
-TARGET_USES_HWC2 := true
+include build/make/target/board/treble_common_32.mk
 
 TARGET_ARCH := arm
 TARGET_ARCH_VARIANT := armv7-a-neon
@@ -58,11 +25,3 @@ TARGET_CPU_VARIANT := generic
 # Enable A/B update
 TARGET_NO_RECOVERY := true
 BOARD_BUILD_SYSTEM_ROOT_IMAGE := true
-
-BOARD_SYSTEMIMAGE_PARTITION_SIZE := 1610612736
-
-# TODO(b/35790399): remove when b/35790399 is fixed.
-BOARD_NAND_SPARE_SIZE := 0
-BOARD_FLASH_BLOCK_SIZE := 512
-
-BOARD_PROPERTY_OVERRIDES_SPLIT_ENABLED := true
diff --git a/target/board/generic_x86_64_a/BoardConfig.mk b/target/board/generic_x86_64_a/BoardConfig.mk
index bd1f750e3..2c0260439 100644
--- a/target/board/generic_x86_64_a/BoardConfig.mk
+++ b/target/board/generic_x86_64_a/BoardConfig.mk
@@ -14,40 +14,7 @@
 # limitations under the License.
 #
 
-# Common boardconfig settings for generic AOSP products targetting mobile
-# (phone/table) devices.
-
-# System properties
-TARGET_SYSTEM_PROP := build/make/target/board/treble_system.prop
-
-# Bootloader is not part of generic AOSP image
-TARGET_NO_BOOTLOADER := true
-
-# Kernel is also not part of generic AOSP image
-TARGET_NO_KERNEL := true
-
-# system.img is always ext4 with sparse option
-TARGET_USERIMAGES_USE_EXT4 := true
-TARGET_USERIMAGES_SPARSE_EXT_DISABLED := false
-TARGET_USES_MKE2FS := true
-
-# Enable dex pre-opt to speed up initial boot
-ifeq ($(HOST_OS),linux)
-  ifeq ($(WITH_DEXPREOPT),)
-    WITH_DEXPREOPT := true
-    WITH_DEXPREOPT_PIC := true
-    ifneq ($(TARGET_BUILD_VARIANT),user)
-      # Retain classes.dex in APK's for non-user builds
-      DEX_PREOPT_DEFAULT := nostripping
-    endif
-  endif
-endif
-
-# Generic AOSP image always requires separate vendor.img
-TARGET_COPY_OUT_VENDOR := vendor
-
-# Generic AOSP image does NOT support HWC1
-TARGET_USES_HWC2 := true
+include build/make/target/board/treble_common_64.mk
 
 TARGET_CPU_ABI := x86_64
 TARGET_ARCH := x86_64
@@ -56,13 +23,3 @@ TARGET_ARCH_VARIANT := x86_64
 TARGET_2ND_CPU_ABI := x86
 TARGET_2ND_ARCH := x86
 TARGET_2ND_ARCH_VARIANT := x86_64
-
-TARGET_USES_64_BIT_BINDER := true
-
-BOARD_SYSTEMIMAGE_PARTITION_SIZE := 1610612736	# 1.5 GB
-
-# TODO(b/35790399): remove when b/35790399 is fixed.
-BOARD_NAND_SPARE_SIZE := 0
-BOARD_FLASH_BLOCK_SIZE := 512
-
-BOARD_PROPERTY_OVERRIDES_SPLIT_ENABLED := true
diff --git a/target/board/generic_x86_64_ab/BoardConfig.mk b/target/board/generic_x86_64_ab/BoardConfig.mk
index 41bd7b734..e49863a4b 100644
--- a/target/board/generic_x86_64_ab/BoardConfig.mk
+++ b/target/board/generic_x86_64_ab/BoardConfig.mk
@@ -14,40 +14,7 @@
 # limitations under the License.
 #
 
-# Common boardconfig settings for generic AOSP products targetting mobile
-# (phone/table) devices.
-
-# System properties
-TARGET_SYSTEM_PROP := build/make/target/board/treble_system.prop
-
-# Bootloader is not part of generic AOSP image
-TARGET_NO_BOOTLOADER := true
-
-# Kernel is also not part of generic AOSP image
-TARGET_NO_KERNEL := true
-
-# system.img is always ext4 with sparse option
-TARGET_USERIMAGES_USE_EXT4 := true
-TARGET_USERIMAGES_SPARSE_EXT_DISABLED := false
-TARGET_USES_MKE2FS := true
-
-# Enable dex pre-opt to speed up initial boot
-ifeq ($(HOST_OS),linux)
-  ifeq ($(WITH_DEXPREOPT),)
-    WITH_DEXPREOPT := true
-    WITH_DEXPREOPT_PIC := true
-    ifneq ($(TARGET_BUILD_VARIANT),user)
-      # Retain classes.dex in APK's for non-user builds
-      DEX_PREOPT_DEFAULT := nostripping
-    endif
-  endif
-endif
-
-# Generic AOSP image always requires separate vendor.img
-TARGET_COPY_OUT_VENDOR := vendor
-
-# Generic AOSP image does NOT support HWC1
-TARGET_USES_HWC2 := true
+include build/make/target/board/treble_common_64.mk
 
 TARGET_CPU_ABI := x86_64
 TARGET_ARCH := x86_64
@@ -57,15 +24,6 @@ TARGET_2ND_CPU_ABI := x86
 TARGET_2ND_ARCH := x86
 TARGET_2ND_ARCH_VARIANT := x86_64
 
-TARGET_USES_64_BIT_BINDER := true
-
 # Enable A/B update
+TARGET_NO_RECOVERY := true
 BOARD_BUILD_SYSTEM_ROOT_IMAGE := true
-
-BOARD_SYSTEMIMAGE_PARTITION_SIZE := 1610612736	# 1.5 GB
-
-# TODO(b/35790399): remove when b/35790399 is fixed.
-BOARD_NAND_SPARE_SIZE := 0
-BOARD_FLASH_BLOCK_SIZE := 512
-
-BOARD_PROPERTY_OVERRIDES_SPLIT_ENABLED := true
diff --git a/target/board/generic_x86_a/BoardConfig.mk b/target/board/generic_x86_a/BoardConfig.mk
index 4ca6ebe86..67cb07d7f 100644
--- a/target/board/generic_x86_a/BoardConfig.mk
+++ b/target/board/generic_x86_a/BoardConfig.mk
@@ -14,49 +14,8 @@
 # limitations under the License.
 #
 
-# Common boardconfig settings for generic AOSP products targetting mobile
-# (phone/table) devices.
-
-# System properties
-TARGET_SYSTEM_PROP := build/make/target/board/treble_system.prop
-
-# Bootloader is not part of generic AOSP image
-TARGET_NO_BOOTLOADER := true
-
-# Kernel is also not part of generic AOSP image
-TARGET_NO_KERNEL := true
-
-# system.img is always ext4 with sparse option
-TARGET_USERIMAGES_USE_EXT4 := true
-TARGET_USERIMAGES_SPARSE_EXT_DISABLED := false
-TARGET_USES_MKE2FS := true
-
-# Enable dex pre-opt to speed up initial boot
-ifeq ($(HOST_OS),linux)
-  ifeq ($(WITH_DEXPREOPT),)
-    WITH_DEXPREOPT := true
-    WITH_DEXPREOPT_PIC := true
-    ifneq ($(TARGET_BUILD_VARIANT),user)
-      # Retain classes.dex in APK's for non-user builds
-      DEX_PREOPT_DEFAULT := nostripping
-    endif
-  endif
-endif
-
-# Generic AOSP image always requires separate vendor.img
-TARGET_COPY_OUT_VENDOR := vendor
-
-# Generic AOSP image does NOT support HWC1
-TARGET_USES_HWC2 := true
+include build/make/target/board/treble_common_32.mk
 
 TARGET_CPU_ABI := x86
 TARGET_ARCH := x86
 TARGET_ARCH_VARIANT := x86
-
-BOARD_SYSTEMIMAGE_PARTITION_SIZE := 1610612736	# 1.5 GB
-
-# TODO(b/35790399): remove when b/35790399 is fixed.
-BOARD_NAND_SPARE_SIZE := 0
-BOARD_FLASH_BLOCK_SIZE := 512
-
-BOARD_PROPERTY_OVERRIDES_SPLIT_ENABLED := true
diff --git a/target/board/generic_x86_ab/BoardConfig.mk b/target/board/generic_x86_ab/BoardConfig.mk
index 6a286674d..6e51102a2 100644
--- a/target/board/generic_x86_ab/BoardConfig.mk
+++ b/target/board/generic_x86_ab/BoardConfig.mk
@@ -14,52 +14,12 @@
 # limitations under the License.
 #
 
-# Common boardconfig settings for generic AOSP products targetting mobile
-# (phone/table) devices.
-
-# System properties
-TARGET_SYSTEM_PROP := build/make/target/board/treble_system.prop
-
-# Bootloader is not part of generic AOSP image
-TARGET_NO_BOOTLOADER := true
-
-# Kernel is also not part of generic AOSP image
-TARGET_NO_KERNEL := true
-
-# system.img is always ext4 with sparse option
-TARGET_USERIMAGES_USE_EXT4 := true
-TARGET_USERIMAGES_SPARSE_EXT_DISABLED := false
-TARGET_USES_MKE2FS := true
-
-# Enable dex pre-opt to speed up initial boot
-ifeq ($(HOST_OS),linux)
-  ifeq ($(WITH_DEXPREOPT),)
-    WITH_DEXPREOPT := true
-    WITH_DEXPREOPT_PIC := true
-    ifneq ($(TARGET_BUILD_VARIANT),user)
-      # Retain classes.dex in APK's for non-user builds
-      DEX_PREOPT_DEFAULT := nostripping
-    endif
-  endif
-endif
-
-# Generic AOSP image always requires separate vendor.img
-TARGET_COPY_OUT_VENDOR := vendor
-
-# Generic AOSP image does NOT support HWC1
-TARGET_USES_HWC2 := true
+include build/make/target/board/treble_common_32.mk
 
 TARGET_CPU_ABI := x86
 TARGET_ARCH := x86
 TARGET_ARCH_VARIANT := x86
 
 # Enable A/B update
+TARGET_NO_RECOVERY := true
 BOARD_BUILD_SYSTEM_ROOT_IMAGE := true
-
-BOARD_SYSTEMIMAGE_PARTITION_SIZE := 1610612736	# 1.5 GB
-
-# TODO(b/35790399): remove when b/35790399 is fixed.
-BOARD_NAND_SPARE_SIZE := 0
-BOARD_FLASH_BLOCK_SIZE := 512
-
-BOARD_PROPERTY_OVERRIDES_SPLIT_ENABLED := true
diff --git a/target/board/treble_common.mk b/target/board/treble_common.mk
new file mode 100644
index 000000000..962d0b763
--- /dev/null
+++ b/target/board/treble_common.mk
@@ -0,0 +1,56 @@
+#
+# Copyright (C) 2017 The Android Open-Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# Common boardconfig settings for generic AOSP products targetting mobile
+# (phone/table) devices.
+
+# Properties
+TARGET_SYSTEM_PROP := build/make/target/board/treble_system.prop
+BOARD_PROPERTY_OVERRIDES_SPLIT_ENABLED := true
+
+# Bootloader, kernel and recovery are not part of generic AOSP image
+TARGET_NO_BOOTLOADER := true
+TARGET_NO_KERNEL := true
+
+# system.img is always ext4 with sparse option
+TARGET_USERIMAGES_USE_EXT4 := true
+TARGET_USERIMAGES_SPARSE_EXT_DISABLED := false
+TARGET_USES_MKE2FS := true
+BOARD_SYSTEMIMAGE_PARTITION_SIZE := 1610612736	# 1.5 GB
+
+# Generic AOSP image always requires separate vendor.img
+TARGET_COPY_OUT_VENDOR := vendor
+
+# Enable dex pre-opt to speed up initial boot
+ifeq ($(HOST_OS),linux)
+  ifeq ($(WITH_DEXPREOPT),)
+    WITH_DEXPREOPT := true
+    WITH_DEXPREOPT_PIC := true
+    ifneq ($(TARGET_BUILD_VARIANT),user)
+      # Retain classes.dex in APK's for non-user builds
+      DEX_PREOPT_DEFAULT := nostripping
+    endif
+  endif
+endif
+
+# Generic AOSP image does NOT support HWC1
+TARGET_USES_HWC2 := true
+# Set emulator framebuffer display device buffer count to 3
+NUM_FRAMEBUFFER_SURFACE_BUFFERS := 3
+
+# TODO(b/35790399): remove when b/35790399 is fixed.
+BOARD_NAND_SPARE_SIZE := 0
+BOARD_FLASH_BLOCK_SIZE := 512
diff --git a/target/board/treble_common_32.mk b/target/board/treble_common_32.mk
new file mode 100644
index 000000000..b66c41eb0
--- /dev/null
+++ b/target/board/treble_common_32.mk
@@ -0,0 +1,17 @@
+#
+# Copyright (C) 2017 The Android Open-Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+include build/make/target/board/treble_common.mk
diff --git a/target/board/treble_common_64.mk b/target/board/treble_common_64.mk
new file mode 100644
index 000000000..8980dfde1
--- /dev/null
+++ b/target/board/treble_common_64.mk
@@ -0,0 +1,20 @@
+#
+# Copyright (C) 2017 The Android Open-Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+include build/make/target/board/treble_common.mk
+
+# Enable 64-bits binder
+TARGET_USES_64_BIT_BINDER := true