diff --git a/target/board/mainline_x86_64/BoardConfig.mk b/target/board/mainline_x86_64/BoardConfig.mk
new file mode 100644
index 0000000..118fda6
--- /dev/null
+++ b/target/board/mainline_x86_64/BoardConfig.mk
@@ -0,0 +1,35 @@
+#
+# Copyright (C) 2019 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 := x86_64
+TARGET_ARCH_VARIANT := x86_64
+TARGET_CPU_ABI := x86_64
+
+TARGET_2ND_ARCH := x86
+TARGET_2ND_ARCH_VARIANT := x86_64
+TARGET_2ND_CPU_ABI := x86
+
+include build/make/target/board/BoardConfigMainlineCommon.mk
+
+TARGET_NO_KERNEL := true
+
+# Build generic A/B format system-only OTA.
+AB_OTA_UPDATER := true
+AB_OTA_PARTITIONS := system
+
+BOARD_PRODUCTIMAGE_FILE_SYSTEM_TYPE := ext4
+BOARD_SYSTEM_EXTIMAGE_FILE_SYSTEM_TYPE := ext4
+BOARD_VENDORIMAGE_FILE_SYSTEM_TYPE := ext4
diff --git a/target/product/AndroidProducts.mk b/target/product/AndroidProducts.mk
index ca4ed2c..5ecaf26 100644
--- a/target/product/AndroidProducts.mk
+++ b/target/product/AndroidProducts.mk
@@ -57,6 +57,7 @@
     $(LOCAL_DIR)/mainline_system_arm64.mk \
     $(LOCAL_DIR)/mainline_system_x86.mk \
     $(LOCAL_DIR)/mainline_system_x86_arm.mk \
+    $(LOCAL_DIR)/mainline_system_x86_64.mk \
     $(LOCAL_DIR)/sdk_arm64.mk \
     $(LOCAL_DIR)/sdk.mk \
     $(LOCAL_DIR)/sdk_phone_arm64.mk \
diff --git a/target/product/base_vendor.mk b/target/product/base_vendor.mk
index 1657e71..134ff31 100644
--- a/target/product/base_vendor.mk
+++ b/target/product/base_vendor.mk
@@ -23,6 +23,7 @@
     init_second_stage.recovery \
     ld.config.recovery.txt \
     linker.recovery \
+    linkerconfig.recovery \
     otacerts.recovery \
     recovery \
     shell_and_utilities_recovery \
diff --git a/target/product/developer_gsi_keys.mk b/target/product/developer_gsi_keys.mk
new file mode 100644
index 0000000..79451ad
--- /dev/null
+++ b/target/product/developer_gsi_keys.mk
@@ -0,0 +1,29 @@
+#
+# Copyright (C) 2019 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.
+#
+
+# Device makers who are willing to support booting the public Developer-GSI
+# in locked state can add the following line into a device.mk to inherit this
+# makefile. This file will then install the up-to-date GSI public keys into
+# the first-stage ramdisk to pass verified boot.
+#
+# In device/<company>/<board>/device.mk:
+#   $(call inherit-product, $(SRC_TARGET_DIR)/product/developer_gsi_keys.mk)
+#
+# Currently, the developer GSI images can be downloaded from the following URL:
+#   https://developer.android.com/topic/generic-system-image/releases
+#
+PRODUCT_PACKAGES += \
+    q-developer-gsi.avbpubkey \
diff --git a/target/product/mainline_system_x86_64.mk b/target/product/mainline_system_x86_64.mk
new file mode 100644
index 0000000..1b1a42f
--- /dev/null
+++ b/target/product/mainline_system_x86_64.mk
@@ -0,0 +1,46 @@
+#
+# Copyright (C) 2019 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+#
+# All components inherited here go to system image
+#
+$(call inherit-product, $(SRC_TARGET_DIR)/product/core_64_bit.mk)
+$(call inherit-product, $(SRC_TARGET_DIR)/product/mainline_system.mk)
+$(call enforce-product-packages-exist,)
+
+# Enable mainline checking
+PRODUCT_ENFORCE_ARTIFACT_PATH_REQUIREMENTS := true
+
+# Enable nonflat APEX
+$(call inherit-product, $(SRC_TARGET_DIR)/product/updatable_apex.mk)
+
+PRODUCT_BUILD_CACHE_IMAGE := false
+PRODUCT_BUILD_ODM_IMAGE := false
+PRODUCT_BUILD_PRODUCT_IMAGE  := false
+PRODUCT_BUILD_RAMDISK_IMAGE := false
+PRODUCT_BUILD_SYSTEM_IMAGE := true
+PRODUCT_BUILD_SYSTEM_EXT_IMAGE := false
+PRODUCT_BUILD_SYSTEM_OTHER_IMAGE := false
+PRODUCT_BUILD_USERDATA_IMAGE := false
+PRODUCT_BUILD_VENDOR_IMAGE := false
+
+PRODUCT_SHIPPING_API_LEVEL := 29
+
+PRODUCT_RESTRICT_VENDOR_FILES := all
+
+PRODUCT_NAME := mainline_system_x86_64
+PRODUCT_DEVICE := mainline_x86_64
+PRODUCT_BRAND := generic