diff --git a/core/config.mk b/core/config.mk
index ae65944..0c8a87f 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -1246,6 +1246,12 @@
 # in the source tree.
 dont_bother_goals := out product-graph
 
+ifeq ($(TARGET_SYSTEM_PROP),)
+TARGET_SYSTEM_PROP := $(wildcard $(TARGET_DEVICE_DIR)/system.prop)
+endif
+
+.KATI_READONLY += TARGET_SYSTEM_PROP
+
 include $(BUILD_SYSTEM)/sysprop_config.mk
 
 # Make ANDROID Soong config variables visible to Android.mk files, for
diff --git a/core/soong_config.mk b/core/soong_config.mk
index 72ee2e4..ab29a61 100644
--- a/core/soong_config.mk
+++ b/core/soong_config.mk
@@ -340,6 +340,8 @@
 
 $(call add_json_list, OemProperties, $(PRODUCT_OEM_PROPERTIES))
 
+$(call add_json_list, SystemPropFiles, $(TARGET_SYSTEM_PROP))
+
 # Do not set ArtTargetIncludeDebugBuild into any value if PRODUCT_ART_TARGET_INCLUDE_DEBUG_BUILD is not set,
 # to have the same behavior from runtime_libart.mk.
 ifneq ($(PRODUCT_ART_TARGET_INCLUDE_DEBUG_BUILD),)
diff --git a/core/soong_extra_config.mk b/core/soong_extra_config.mk
index e4432d2..2df721f 100644
--- a/core/soong_extra_config.mk
+++ b/core/soong_extra_config.mk
@@ -93,6 +93,8 @@
 
 $(call add_json_list, BuildVersionTags, $(BUILD_VERSION_TAGS))
 
+$(call add_json_bool, ProductNotDebuggableInUserdebug, $(PRODUCT_NOT_DEBUGGABLE_IN_USERDEBUG))
+
 $(call json_end)
 
 $(shell mkdir -p $(dir $(SOONG_EXTRA_VARIABLES)))
diff --git a/core/sysprop.mk b/core/sysprop.mk
index 47d8a41..7dd756a 100644
--- a/core/sysprop.mk
+++ b/core/sysprop.mk
@@ -33,34 +33,26 @@
     echo "# from generate-common-build-props" >> $(2);\
     echo "# These properties identify this partition image." >> $(2);\
     echo "####################################" >> $(2);\
-    $(if $(filter system,$(1)),\
-        echo "ro.product.$(1).brand=$(PRODUCT_SYSTEM_BRAND)" >> $(2);\
-        echo "ro.product.$(1).device=$(PRODUCT_SYSTEM_DEVICE)" >> $(2);\
-        echo "ro.product.$(1).manufacturer=$(PRODUCT_SYSTEM_MANUFACTURER)" >> $(2);\
-        echo "ro.product.$(1).model=$(PRODUCT_SYSTEM_MODEL)" >> $(2);\
-        echo "ro.product.$(1).name=$(PRODUCT_SYSTEM_NAME)" >> $(2);\
-      ,\
-        echo "ro.product.$(1).brand=$(PRODUCT_BRAND)" >> $(2);\
-        echo "ro.product.$(1).device=$(TARGET_DEVICE)" >> $(2);\
-        echo "ro.product.$(1).manufacturer=$(PRODUCT_MANUFACTURER)" >> $(2);\
-        echo "ro.product.$(1).model=$(PRODUCT_MODEL)" >> $(2);\
-        echo "ro.product.$(1).name=$(TARGET_PRODUCT)" >> $(2);\
-        if [ -n "$(strip $(PRODUCT_MODEL_FOR_ATTESTATION))" ]; then \
-            echo "ro.product.model_for_attestation=$(PRODUCT_MODEL_FOR_ATTESTATION)" >> $(2);\
-        fi; \
-        if [ -n "$(strip $(PRODUCT_BRAND_FOR_ATTESTATION))" ]; then \
-            echo "ro.product.brand_for_attestation=$(PRODUCT_BRAND_FOR_ATTESTATION)" >> $(2);\
-        fi; \
-        if [ -n "$(strip $(PRODUCT_NAME_FOR_ATTESTATION))" ]; then \
-            echo "ro.product.name_for_attestation=$(PRODUCT_NAME_FOR_ATTESTATION)" >> $(2);\
-        fi; \
-        if [ -n "$(strip $(PRODUCT_DEVICE_FOR_ATTESTATION))" ]; then \
-            echo "ro.product.device_for_attestation=$(PRODUCT_DEVICE_FOR_ATTESTATION)" >> $(2);\
-        fi; \
-        if [ -n "$(strip $(PRODUCT_MANUFACTURER_FOR_ATTESTATION))" ]; then \
-            echo "ro.product.manufacturer_for_attestation=$(PRODUCT_MANUFACTURER_FOR_ATTESTATION)" >> $(2);\
-        fi; \
-    )\
+    echo "ro.product.$(1).brand=$(PRODUCT_BRAND)" >> $(2);\
+    echo "ro.product.$(1).device=$(TARGET_DEVICE)" >> $(2);\
+    echo "ro.product.$(1).manufacturer=$(PRODUCT_MANUFACTURER)" >> $(2);\
+    echo "ro.product.$(1).model=$(PRODUCT_MODEL)" >> $(2);\
+    echo "ro.product.$(1).name=$(TARGET_PRODUCT)" >> $(2);\
+    if [ -n "$(strip $(PRODUCT_MODEL_FOR_ATTESTATION))" ]; then \
+        echo "ro.product.model_for_attestation=$(PRODUCT_MODEL_FOR_ATTESTATION)" >> $(2);\
+    fi; \
+    if [ -n "$(strip $(PRODUCT_BRAND_FOR_ATTESTATION))" ]; then \
+        echo "ro.product.brand_for_attestation=$(PRODUCT_BRAND_FOR_ATTESTATION)" >> $(2);\
+    fi; \
+    if [ -n "$(strip $(PRODUCT_NAME_FOR_ATTESTATION))" ]; then \
+        echo "ro.product.name_for_attestation=$(PRODUCT_NAME_FOR_ATTESTATION)" >> $(2);\
+    fi; \
+    if [ -n "$(strip $(PRODUCT_DEVICE_FOR_ATTESTATION))" ]; then \
+        echo "ro.product.device_for_attestation=$(PRODUCT_DEVICE_FOR_ATTESTATION)" >> $(2);\
+    fi; \
+    if [ -n "$(strip $(PRODUCT_MANUFACTURER_FOR_ATTESTATION))" ]; then \
+        echo "ro.product.manufacturer_for_attestation=$(PRODUCT_MANUFACTURER_FOR_ATTESTATION)" >> $(2);\
+    fi; \
     $(if $(filter true,$(ZYGOTE_FORCE_64)),\
         $(if $(filter vendor,$(1)),\
             echo "ro.$(1).product.cpu.abilist=$(TARGET_CPU_ABI_LIST_64_BIT)" >> $(2);\
@@ -226,50 +218,11 @@
 # -----------------------------------------------------------------
 # system/build.prop
 #
-# Note: parts of this file that can't be generated by the build-properties
-# macro are manually created as separate files and then fed into the macro
-
-buildinfo_prop := $(call intermediates-dir-for,ETC,buildinfo.prop)/buildinfo.prop
-
-ifdef TARGET_SYSTEM_PROP
-system_prop_file := $(TARGET_SYSTEM_PROP)
-else
-system_prop_file := $(wildcard $(TARGET_DEVICE_DIR)/system.prop)
-endif
-
-_prop_files_ := \
-  $(buildinfo_prop) \
-  $(system_prop_file)
-
-# Order matters here. When there are duplicates, the last one wins.
-# TODO(b/117892318): don't allow duplicates so that the ordering doesn't matter
-_prop_vars_ := \
-    ADDITIONAL_SYSTEM_PROPERTIES \
-    PRODUCT_SYSTEM_PROPERTIES
-
-# TODO(b/117892318): deprecate this
-_prop_vars_ += \
-    PRODUCT_SYSTEM_DEFAULT_PROPERTIES
-
-ifndef property_overrides_split_enabled
-_prop_vars_ += \
-    ADDITIONAL_VENDOR_PROPERTIES \
-    PRODUCT_VENDOR_PROPERTIES
-endif
+# system/build.prop is built by Soong. See system-build.prop module in
+# build/soong/Android.bp.
 
 INSTALLED_BUILD_PROP_TARGET := $(TARGET_OUT)/build.prop
 
-$(eval $(call build-properties,\
-    system,\
-    $(INSTALLED_BUILD_PROP_TARGET),\
-    $(_prop_files_),\
-    $(_prop_vars_),\
-    $(PRODUCT_SYSTEM_PROPERTY_BLACKLIST),\
-    $(empty),\
-    $(empty)))
-
-$(eval $(call declare-1p-target,$(INSTALLED_BUILD_PROP_TARGET)))
-
 # -----------------------------------------------------------------
 # vendor/build.prop
 #
diff --git a/core/sysprop_config.mk b/core/sysprop_config.mk
index f9b9d1c..543b86b 100644
--- a/core/sysprop_config.mk
+++ b/core/sysprop_config.mk
@@ -15,28 +15,7 @@
 )
 _additional_prop_var_names :=
 
-#
-# -----------------------------------------------------------------
-# Add the product-defined properties to the build properties.
-ifneq ($(BOARD_PROPERTY_OVERRIDES_SPLIT_ENABLED), true)
-  ADDITIONAL_SYSTEM_PROPERTIES += $(PRODUCT_PROPERTY_OVERRIDES)
-else
-  ifndef BOARD_VENDORIMAGE_FILE_SYSTEM_TYPE
-    ADDITIONAL_SYSTEM_PROPERTIES += $(PRODUCT_PROPERTY_OVERRIDES)
-  endif
-endif
-
-ADDITIONAL_SYSTEM_PROPERTIES += ro.treble.enabled=${PRODUCT_FULL_TREBLE}
-
-# Set ro.llndk.api_level to show the maximum vendor API level that the LLNDK in
-# the system partition supports.
-ifdef RELEASE_BOARD_API_LEVEL
-ADDITIONAL_SYSTEM_PROPERTIES += ro.llndk.api_level=$(RELEASE_BOARD_API_LEVEL)
-endif
-
-# Sets ro.actionable_compatible_property.enabled to know on runtime whether the
-# allowed list of actionable compatible properties is enabled or not.
-ADDITIONAL_SYSTEM_PROPERTIES += ro.actionable_compatible_property.enabled=true
+$(KATI_obsolete_var ADDITIONAL_SYSTEM_PROPERTIES,Use build/soong/scripts/gen_build_prop.py instead)
 
 # Add the system server compiler filter if they are specified for the product.
 ifneq (,$(PRODUCT_SYSTEM_SERVER_COMPILER_FILTER))
@@ -56,23 +35,6 @@
 ADDITIONAL_PRODUCT_PROPERTIES += ro.product.page_size=4096
 endif
 
-# Enable core platform API violation warnings on userdebug and eng builds.
-ifneq ($(TARGET_BUILD_VARIANT),user)
-ADDITIONAL_SYSTEM_PROPERTIES += persist.debug.dalvik.vm.core_platform_api_policy=just-warn
-endif
-
-# Define ro.sanitize.<name> properties for all global sanitizers.
-ADDITIONAL_SYSTEM_PROPERTIES += $(foreach s,$(SANITIZE_TARGET),ro.sanitize.$(s)=true)
-
-# Sets the default value of ro.postinstall.fstab.prefix to /system.
-# Device board config should override the value to /product when needed by:
-#
-#     PRODUCT_PRODUCT_PROPERTIES += ro.postinstall.fstab.prefix=/product
-#
-# It then uses ${ro.postinstall.fstab.prefix}/etc/fstab.postinstall to
-# mount system_other partition.
-ADDITIONAL_SYSTEM_PROPERTIES += ro.postinstall.fstab.prefix=/system
-
 # Add cpu properties for bionic and ART.
 ADDITIONAL_VENDOR_PROPERTIES += ro.bionic.arch=$(TARGET_ARCH)
 ADDITIONAL_VENDOR_PROPERTIES += ro.bionic.cpu_variant=$(TARGET_CPU_VARIANT_RUNTIME)
@@ -200,87 +162,6 @@
 endif
 
 user_variant := $(filter user userdebug,$(TARGET_BUILD_VARIANT))
-enable_target_debugging := true
-enable_dalvik_lock_contention_logging := true
-ifneq (,$(user_variant))
-  # Target is secure in user builds.
-  ADDITIONAL_SYSTEM_PROPERTIES += ro.secure=1
-  ADDITIONAL_SYSTEM_PROPERTIES += security.perf_harden=1
-
-  ifeq ($(user_variant),user)
-    ADDITIONAL_SYSTEM_PROPERTIES += ro.adb.secure=1
-  endif
-
-  ifneq ($(user_variant),userdebug)
-    # Disable debugging in plain user builds.
-    enable_target_debugging :=
-    enable_dalvik_lock_contention_logging :=
-  else
-    # Disable debugging in userdebug builds if PRODUCT_NOT_DEBUGGABLE_IN_USERDEBUG
-    # is set.
-    ifneq (,$(strip $(PRODUCT_NOT_DEBUGGABLE_IN_USERDEBUG)))
-      enable_target_debugging :=
-    endif
-  endif
-
-  # Disallow mock locations by default for user builds
-  ADDITIONAL_SYSTEM_PROPERTIES += ro.allow.mock.location=0
-
-else # !user_variant
-  # Turn on checkjni for non-user builds.
-  ADDITIONAL_SYSTEM_PROPERTIES += ro.kernel.android.checkjni=1
-  # Set device insecure for non-user builds.
-  ADDITIONAL_SYSTEM_PROPERTIES += ro.secure=0
-  # Allow mock locations by default for non user builds
-  ADDITIONAL_SYSTEM_PROPERTIES += ro.allow.mock.location=1
-endif # !user_variant
-
-ifeq (true,$(strip $(enable_dalvik_lock_contention_logging)))
-  # Enable Dalvik lock contention logging.
-  ADDITIONAL_SYSTEM_PROPERTIES += dalvik.vm.lockprof.threshold=500
-endif # !enable_dalvik_lock_contention_logging
-
-ifeq (true,$(strip $(enable_target_debugging)))
-  # Target is more debuggable and adbd is on by default
-  ADDITIONAL_SYSTEM_PROPERTIES += ro.debuggable=1
-else # !enable_target_debugging
-  # Target is less debuggable and adbd is off by default
-  ADDITIONAL_SYSTEM_PROPERTIES += ro.debuggable=0
-endif # !enable_target_debugging
-
-enable_target_debugging:=
-enable_dalvik_lock_contention_logging:=
-
-ifneq ($(filter sdk sdk_addon,$(MAKECMDGOALS)),)
-_is_sdk_build := true
-endif
-
-ifeq ($(TARGET_BUILD_VARIANT),eng)
-ifneq ($(filter ro.setupwizard.mode=ENABLED, $(call collapse-pairs, $(ADDITIONAL_SYSTEM_PROPERTIES))),)
-  # Don't require the setup wizard on eng builds
-  ADDITIONAL_SYSTEM_PROPERTIES := $(filter-out ro.setupwizard.mode=%,\
-          $(call collapse-pairs, $(ADDITIONAL_SYSTEM_PROPERTIES))) \
-          ro.setupwizard.mode=OPTIONAL
-endif
-ifndef _is_sdk_build
-  # To speedup startup of non-preopted builds, don't verify or compile the boot image.
-  ADDITIONAL_SYSTEM_PROPERTIES += dalvik.vm.image-dex2oat-filter=extract
-endif
-# b/323566535
-ADDITIONAL_SYSTEM_PROPERTIES += init.svc_debug.no_fatal.zygote=true
-endif
-
-ifdef _is_sdk_build
-ADDITIONAL_SYSTEM_PROPERTIES += xmpp.auto-presence=true
-ADDITIONAL_SYSTEM_PROPERTIES += ro.config.nocheckin=yes
-endif
-
-_is_sdk_build :=
-
-ADDITIONAL_SYSTEM_PROPERTIES += net.bt.name=Android
-
-# This property is set by flashing debug boot image, so default to false.
-ADDITIONAL_SYSTEM_PROPERTIES += ro.force.debuggable=0
 
 config_enable_uffd_gc := \
   $(firstword $(OVERRIDE_ENABLE_UFFD_GC) $(PRODUCT_ENABLE_UFFD_GC) default)
@@ -291,11 +172,9 @@
 # If the value is "default", it will be mangled by post_process_props.py.
 ADDITIONAL_PRODUCT_PROPERTIES += ro.dalvik.vm.enable_uffd_gc=$(config_enable_uffd_gc)
 
-ADDITIONAL_SYSTEM_PROPERTIES := $(strip $(ADDITIONAL_SYSTEM_PROPERTIES))
 ADDITIONAL_PRODUCT_PROPERTIES := $(strip $(ADDITIONAL_PRODUCT_PROPERTIES))
 ADDITIONAL_VENDOR_PROPERTIES := $(strip $(ADDITIONAL_VENDOR_PROPERTIES))
 
 .KATI_READONLY += \
-    ADDITIONAL_SYSTEM_PROPERTIES \
     ADDITIONAL_PRODUCT_PROPERTIES \
     ADDITIONAL_VENDOR_PROPERTIES
diff --git a/target/product/base_system.mk b/target/product/base_system.mk
index 9728cc0..f5b23fc 100644
--- a/target/product/base_system.mk
+++ b/target/product/base_system.mk
@@ -280,6 +280,7 @@
     storaged \
     surfaceflinger \
     svc \
+    system-build.prop \
     task_profiles.json \
     tc \
     telecom \