diff --git a/target/board/BoardConfigEmuCommon.mk b/target/board/BoardConfigEmuCommon.mk
index 6b2291f..a375826 100644
--- a/target/board/BoardConfigEmuCommon.mk
+++ b/target/board/BoardConfigEmuCommon.mk
@@ -33,8 +33,8 @@
   # emulator needs super.img
   BOARD_BUILD_SUPER_IMAGE_BY_DEFAULT := true
 
-  # 3G + header
-  BOARD_SUPER_PARTITION_SIZE := 3229614080
+  # 4G
+  BOARD_SUPER_PARTITION_SIZE := 4294967296
   BOARD_SUPER_PARTITION_GROUPS := emulator_dynamic_partitions
 
   ifeq ($(QEMU_USE_SYSTEM_EXT_PARTITIONS),true)
diff --git a/target/board/mainline_sdk/BoardConfig.mk b/target/board/mainline_sdk/BoardConfig.mk
new file mode 100644
index 0000000..84f8b2d
--- /dev/null
+++ b/target/board/mainline_sdk/BoardConfig.mk
@@ -0,0 +1,20 @@
+# Copyright (C) 2020 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.
+#
+
+TARGET_ARCH_SUITE := mainline_sdk
+
+HOST_CROSS_OS := linux_bionic
+HOST_CROSS_ARCH := x86_64
+HOST_CROSS_2ND_ARCH :=
diff --git a/target/board/mainline_sdk/README.md b/target/board/mainline_sdk/README.md
new file mode 100644
index 0000000..714f797
--- /dev/null
+++ b/target/board/mainline_sdk/README.md
@@ -0,0 +1,2 @@
+This device is suitable for a soong-only build that builds for all the architectures
+needed for mainline modules sdk prebuilts.
diff --git a/target/product/AndroidProducts.mk b/target/product/AndroidProducts.mk
index 5094149..f657fbf 100644
--- a/target/product/AndroidProducts.mk
+++ b/target/product/AndroidProducts.mk
@@ -73,6 +73,8 @@
 
 endif
 
+PRODUCT_MAKEFILES += $(LOCAL_DIR)/mainline_sdk.mk
+
 COMMON_LUNCH_CHOICES := \
     aosp_arm64-eng \
     aosp_arm-eng \
diff --git a/target/product/mainline_sdk.mk b/target/product/mainline_sdk.mk
new file mode 100644
index 0000000..343aed6
--- /dev/null
+++ b/target/product/mainline_sdk.mk
@@ -0,0 +1,18 @@
+# Copyright (C) 2020 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.
+#
+
+PRODUCT_NAME := mainline_sdk
+PRODUCT_BRAND := Android
+PRODUCT_DEVICE := mainline_sdk
diff --git a/tools/zipalign/TEST_MAPPING b/tools/zipalign/TEST_MAPPING
deleted file mode 100644
index 98420f3..0000000
--- a/tools/zipalign/TEST_MAPPING
+++ /dev/null
@@ -1,8 +0,0 @@
-{
-  "presubmit": [
-    {
-      "name": "zipalign_tests",
-      "host": true
-    }
-  ]
-}