diff --git a/core/Makefile b/core/Makefile
index d85bd76..61dbaf5 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -40,6 +40,10 @@
 )
 endef
 
+# Phony target to check PRODUCT_COPY_FILES copy pairs don't contain ELF files
+.PHONY: check-elf-prebuilt-product-copy-files
+check-elf-prebuilt-product-copy-files:
+
 check_elf_prebuilt_product_copy_files := true
 ifneq (,$(filter true,$(BUILD_BROKEN_ELF_PREBUILT_PRODUCT_COPY_FILES)))
 check_elf_prebuilt_product_copy_files :=
@@ -543,6 +547,12 @@
 
 $(call dist-for-goals,droidcore,$(PGO_PROFILE_MISSING))
 
+CERTIFICATE_VIOLATION_MODULES_FILENAME := $(PRODUCT_OUT)/certificate_violation_modules.txt
+$(CERTIFICATE_VIOLATION_MODULES_FILENAME):
+	rm -f $@
+	$(foreach m,$(sort $(CERTIFICATE_VIOLATION_MODULES)), echo $(m) >> $@;)
+$(call dist-for-goals,droidcore,$(CERTIFICATE_VIOLATION_MODULES_FILENAME))
+
 # -----------------------------------------------------------------
 # The dev key is used to sign this package, and as the key required
 # for future OTA packages installed by this system.  Actual product
@@ -1666,16 +1676,15 @@
 INSTALLED_FILES_FILE_RECOVERY := $(PRODUCT_OUT)/installed-files-recovery.txt
 INSTALLED_FILES_JSON_RECOVERY := $(INSTALLED_FILES_FILE_RECOVERY:.txt=.json)
 
+ifeq ($(BOARD_USES_RECOVERY_AS_BOOT),true)
+INSTALLED_BOOTIMAGE_TARGET := $(BUILT_BOOTIMAGE_TARGET)
+endif
+
 # TODO(b/30414428): Can't depend on INTERNAL_RECOVERYIMAGE_FILES alone like other
 # INSTALLED_FILES_FILE_* rules. Because currently there're cp/rsync/rm commands in
 # build-recoveryimage-target, which would touch the files under TARGET_RECOVERY_OUT and race with
 # the call to FILELIST.
-ifeq ($(BOARD_USES_RECOVERY_AS_BOOT),true)
-INSTALLED_BOOTIMAGE_TARGET := $(BUILT_BOOTIMAGE_TARGET)
-$(INSTALLED_FILES_FILE_RECOVERY): $(INSTALLED_BOOTIMAGE_TARGET)
-else
-$(INSTALLED_FILES_FILE_RECOVERY): $(INSTALLED_RECOVERYIMAGE_TARGET)
-endif
+$(INSTALLED_FILES_FILE_RECOVERY): $(INTERNAL_RECOVERY_RAMDISK_FILES_TIMESTAMP)
 
 $(INSTALLED_FILES_FILE_RECOVERY): .KATI_IMPLICIT_OUTPUTS := $(INSTALLED_FILES_JSON_RECOVERY)
 $(INSTALLED_FILES_FILE_RECOVERY): $(INTERNAL_RECOVERYIMAGE_FILES) $(FILESLIST) $(FILESLIST_UTIL)
@@ -2467,6 +2476,15 @@
 # -----------------------------------------------------------------
 ifdef BUILDING_SYSTEM_IMAGE
 
+# Install system linker configuration
+# Collect all available stub libraries installed in system and install with predefined linker configuration
+SYSTEM_LINKER_CONFIG := $(TARGET_OUT)/etc/linker.config.pb
+$(SYSTEM_LINKER_CONFIG) : $(INTERNAL_SYSTEMIMAGE_FILES) $(LINKER_CONFIG_PATH_system_linker_config) | conv_linker_config
+	$(HOST_OUT_EXECUTABLES)/conv_linker_config systemprovide --source $(LINKER_CONFIG_PATH_system_linker_config)\
+	  --output $@ --value "$(STUB_LIBRARIES)" --system "$(TARGET_OUT)"
+
+FULL_SYSTEMIMAGE_DEPS += $(SYSTEM_LINKER_CONFIG)
+
 # installed file list
 # Depending on anything that $(BUILT_SYSTEMIMAGE) depends on.
 # We put installed-files.txt ahead of image itself in the dependency graph
@@ -3141,6 +3159,26 @@
 
 endif # BOARD_PREBUILT_DTBOIMAGE
 
+# -----------------------------------------------------------------
+# Protected VM firmware image
+ifdef BOARD_PREBUILT_PVMFWIMAGE
+INSTALLED_PVMFWIMAGE_TARGET := $(PRODUCT_OUT)/pvmfw.img
+
+ifeq ($(BOARD_AVB_ENABLE),true)
+$(INSTALLED_PVMFWIMAGE_TARGET): $(BOARD_PREBUILT_PVMFWIMAGE) $(AVBTOOL) $(BOARD_AVB_PVMFW_KEY_PATH)
+	cp $(BOARD_PREBUILT_PVMFWIMAGE) $@
+	$(AVBTOOL) add_hash_footer \
+	    --image $@ \
+	    --partition_size $(BOARD_PVMFWIMG_PARTITION_SIZE) \
+	    --partition_name pvmfw $(INTERNAL_AVB_PVMFW_SIGNING_ARGS) \
+	    $(BOARD_AVB_PVMFW_ADD_HASH_FOOTER_ARGS)
+else
+$(INSTALLED_PVMFWIMAGE_TARGET): $(BOARD_PREBUILT_PVMFWIMAGE)
+	cp $(BOARD_PREBUILT_PVMFWIMAGE) $@
+endif
+
+endif # BOARD_PREBUILT_PVMFWIMAGE
+
 # Returns a list of image targets corresponding to the given list of partitions. For example, it
 # returns "$(INSTALLED_PRODUCTIMAGE_TARGET)" for "product", or "$(INSTALLED_SYSTEMIMAGE_TARGET)
 # $(INSTALLED_VENDORIMAGE_TARGET)" for "system vendor".
@@ -3288,6 +3326,9 @@
 BOARD_AVB_DTBO_ADD_HASH_FOOTER_ARGS += \
     --prop com.android.build.dtbo.fingerprint:$(BUILD_FINGERPRINT_FROM_FILE)
 
+BOARD_AVB_PVMFW_ADD_HASH_FOOTER_ARGS += \
+    --prop com.android.build.pvmfw.fingerprint:$(BUILD_FINGERPRINT_FROM_FILE)
+
 # The following vendor- and odm-specific images needs explicit SPL set per board.
 ifdef BOOT_SECURITY_PATCH
 BOARD_AVB_BOOT_ADD_HASH_FOOTER_ARGS += \
@@ -3314,9 +3355,15 @@
     --prop com.android.build.odm_dlkm.security_patch:$(ODM_DLKM_SECURITY_PATCH)
 endif
 
+ifdef PVMFW_SECURITY_PATCH
+BOARD_AVB_PVMFW_ADD_HASH_FOOTER_ARGS += \
+    --prop com.android.build.pvmfw.security_patch:$(PVMFW_SECURITY_PATCH)
+endif
+
 BOOT_FOOTER_ARGS := BOARD_AVB_BOOT_ADD_HASH_FOOTER_ARGS
 VENDOR_BOOT_FOOTER_ARGS := BOARD_AVB_VENDOR_BOOT_ADD_HASH_FOOTER_ARGS
 DTBO_FOOTER_ARGS := BOARD_AVB_DTBO_ADD_HASH_FOOTER_ARGS
+PVMFW_FOOTER_ARGS := BOARD_AVB_PVMFW_ADD_HASH_FOOTER_ARGS
 SYSTEM_FOOTER_ARGS := BOARD_AVB_SYSTEM_ADD_HASHTREE_FOOTER_ARGS
 VENDOR_FOOTER_ARGS := BOARD_AVB_VENDOR_ADD_HASHTREE_FOOTER_ARGS
 RECOVERY_FOOTER_ARGS := BOARD_AVB_RECOVERY_ADD_HASH_FOOTER_ARGS
@@ -3431,6 +3478,10 @@
 $(eval $(call check-and-set-avb-args,dtbo))
 endif
 
+ifdef INSTALLED_PVMFWIMAGE_TARGET
+$(eval $(call check-and-set-avb-args,pvmfw))
+endif
+
 ifdef INSTALLED_RECOVERYIMAGE_TARGET
 $(eval $(call check-and-set-avb-args,recovery))
 endif
@@ -3516,6 +3567,9 @@
   $(if $(BOARD_AVB_DTBO_KEY_PATH),\
     $(hide) $(AVBTOOL) extract_public_key --key $(BOARD_AVB_DTBO_KEY_PATH) \
       --output $(1)/dtbo.avbpubkey)
+  $(if $(BOARD_AVB_PVMFW_KEY_PATH),\
+    $(hide) $(AVBTOOL) extract_public_key --key $(BOARD_AVB_PVMFW_KEY_PATH) \
+      --output $(1)/pvmfw.avbpubkey)
   $(if $(BOARD_AVB_RECOVERY_KEY_PATH),\
     $(hide) $(AVBTOOL) extract_public_key --key $(BOARD_AVB_RECOVERY_KEY_PATH) \
       --output $(1)/recovery.avbpubkey)
@@ -3598,6 +3652,7 @@
 	    $(INSTALLED_VENDOR_DLKMIMAGE_TARGET) \
 	    $(INSTALLED_ODM_DLKMIMAGE_TARGET) \
 	    $(INSTALLED_DTBOIMAGE_TARGET) \
+	    $(INSTALLED_PVMFWIMAGE_TARGET) \
 	    $(INSTALLED_CUSTOMIMAGES_TARGET) \
 	    $(INSTALLED_RECOVERYIMAGE_TARGET) \
 	    $(INSTALLED_VBMETA_SYSTEMIMAGE_TARGET) \
@@ -3951,6 +4006,7 @@
   fec \
   fs_config \
   generate_verity_key \
+  host_init_verifier \
   img2simg \
   img_from_target_files \
   imgdiff \
@@ -4230,6 +4286,18 @@
 endif # BOARD_AVB_DTBO_KEY_PATH
 endif # BOARD_AVB_ENABLE
 endif # BOARD_PREBUILT_DTBOIMAGE
+ifdef BOARD_PREBUILT_PVMFWIMAGE
+	$(hide) echo "has_pvmfw=true" >> $@
+ifeq ($(BOARD_AVB_ENABLE),true)
+	$(hide) echo "pvmfw_size=$(BOARD_PVMFWIMG_PARTITION_SIZE)" >> $@
+	$(hide) echo "avb_pvmfw_add_hash_footer_args=$(BOARD_AVB_PVMFW_ADD_HASH_FOOTER_ARGS)" >> $@
+ifdef BOARD_AVB_PVMFW_KEY_PATH
+	$(hide) echo "avb_pvmfw_key_path=$(BOARD_AVB_PVMFW_KEY_PATH)" >> $@
+	$(hide) echo "avb_pvmfw_algorithm=$(BOARD_AVB_PVMFW_ALGORITHM)" >> $@
+	$(hide) echo "avb_pvmfw_rollback_index_location=$(BOARD_AVB_PVMFW_ROLLBACK_INDEX_LOCATION)" >> $@
+endif # BOARD_AVB_PVMFW_KEY_PATH
+endif # BOARD_AVB_ENABLE
+endif # BOARD_PREBUILT_PVMFWIMAGE
 	$(call dump-dynamic-partitions-info,$@)
 	@# VINTF checks
 ifeq ($(PRODUCT_ENFORCE_VINTF_MANIFEST),true)
@@ -4499,6 +4567,7 @@
 	    $(INSTALLED_RECOVERYIMAGE_TARGET) \
 	    $(INSTALLED_CACHEIMAGE_TARGET) \
 	    $(INSTALLED_DTBOIMAGE_TARGET) \
+	    $(INSTALLED_PVMFWIMAGE_TARGET) \
 	    $(INSTALLED_CUSTOMIMAGES_TARGET) \
 	    $(INSTALLED_ANDROID_INFO_TXT_TARGET) \
 	    $(INSTALLED_KERNEL_TARGET) \
@@ -4781,6 +4850,10 @@
 	$(hide) mkdir -p $(zip_root)/PREBUILT_IMAGES
 	$(hide) cp $(INSTALLED_DTBOIMAGE_TARGET) $(zip_root)/PREBUILT_IMAGES/
 endif # BOARD_PREBUILT_DTBOIMAGE
+ifdef BOARD_PREBUILT_PVMFWIMAGE
+	$(hide) mkdir -p $(zip_root)/PREBUILT_IMAGES
+	$(hide) cp $(INSTALLED_PVMFWIMAGE_TARGET) $(zip_root)/PREBUILT_IMAGES/
+endif # BOARD_PREBUILT_PVMFWIMAGE
 ifdef BOARD_PREBUILT_BOOTLOADER
 	$(hide) mkdir -p $(zip_root)/IMAGES
 	$(hide) cp $(INSTALLED_BOOTLOADER_MODULE) $(zip_root)/IMAGES/
diff --git a/core/artifact_path_requirements.mk b/core/artifact_path_requirements.mk
new file mode 100644
index 0000000..8b2d71b
--- /dev/null
+++ b/core/artifact_path_requirements.mk
@@ -0,0 +1,58 @@
+# This file contains logic to enforce artifact path requirements
+# defined in product makefiles.
+
+# Fakes don't get installed, and NDK stubs aren't installed to device.
+static_allowed_patterns := $(TARGET_OUT_FAKE)/% $(SOONG_OUT_DIR)/ndk/%
+# RROs become REQUIRED by the source module, but are always placed on the vendor partition.
+static_allowed_patterns += %__auto_generated_rro_product.apk
+static_allowed_patterns += %__auto_generated_rro_vendor.apk
+# Auto-included targets are not considered
+static_allowed_patterns += $(call product-installed-files,)
+# $(PRODUCT_OUT)/apex is where shared libraries in APEXes get installed.
+# The path can be considered as a fake path, as the shared libraries
+# are installed there just to have symbols files for them under
+# $(PRODUCT_OUT)/symbols/apex for debugging purpose. The /apex directory
+# is never compiled into a filesystem image.
+static_allowed_patterns += $(PRODUCT_OUT)/apex/%
+ifeq (true,$(BOARD_USES_SYSTEM_OTHER_ODEX))
+  # Allow system_other odex space optimization.
+  static_allowed_patterns += \
+    $(TARGET_OUT_SYSTEM_OTHER)/%.odex \
+    $(TARGET_OUT_SYSTEM_OTHER)/%.vdex \
+    $(TARGET_OUT_SYSTEM_OTHER)/%.art
+endif
+
+all_offending_files :=
+$(foreach makefile,$(ARTIFACT_PATH_REQUIREMENT_PRODUCTS),\
+  $(eval requirements := $(PRODUCTS.$(makefile).ARTIFACT_PATH_REQUIREMENTS)) \
+  $(eval ### Verify that the product only produces files inside its path requirements.) \
+  $(eval allowed := $(PRODUCTS.$(makefile).ARTIFACT_PATH_ALLOWED_LIST)) \
+  $(eval path_patterns := $(call resolve-product-relative-paths,$(requirements),%)) \
+  $(eval allowed_patterns := $(call resolve-product-relative-paths,$(allowed))) \
+  $(eval files := $(call product-installed-files, $(makefile))) \
+  $(eval offending_files := $(filter-out $(path_patterns) $(allowed_patterns) $(static_allowed_patterns),$(files))) \
+  $(call maybe-print-list-and-error,$(offending_files),\
+    $(makefile) produces files outside its artifact path requirement. \
+    Allowed paths are $(subst $(space),$(comma)$(space),$(addsuffix *,$(requirements)))) \
+  $(eval unused_allowed := $(filter-out $(files),$(allowed_patterns))) \
+  $(call maybe-print-list-and-error,$(unused_allowed),$(makefile) includes redundant allowed entries in its artifact path requirement.) \
+  $(eval ### Optionally verify that nothing else produces files inside this artifact path requirement.) \
+  $(eval extra_files := $(filter-out $(files) $(HOST_OUT)/%,$(product_target_FILES))) \
+  $(eval files_in_requirement := $(filter $(path_patterns),$(extra_files))) \
+  $(eval all_offending_files += $(files_in_requirement)) \
+  $(eval allowed := $(PRODUCT_ARTIFACT_PATH_REQUIREMENT_ALLOWED_LIST)) \
+  $(eval allowed_patterns := $(call resolve-product-relative-paths,$(allowed))) \
+  $(eval offending_files := $(filter-out $(allowed_patterns),$(files_in_requirement))) \
+  $(eval enforcement := $(PRODUCT_ENFORCE_ARTIFACT_PATH_REQUIREMENTS)) \
+  $(if $(enforcement),\
+    $(call maybe-print-list-and-error,$(offending_files),\
+      $(INTERNAL_PRODUCT) produces files inside $(makefile)s artifact path requirement. \
+      $(PRODUCT_ARTIFACT_PATH_REQUIREMENT_HINT)) \
+    $(eval unused_allowed := $(if $(filter true strict,$(enforcement)),\
+      $(foreach p,$(allowed_patterns),$(if $(filter $(p),$(extra_files)),,$(p))))) \
+    $(call maybe-print-list-and-error,$(unused_allowed),$(INTERNAL_PRODUCT) includes redundant artifact path requirement allowed list entries.) \
+  ) \
+)
+$(PRODUCT_OUT)/offending_artifacts.txt:
+	rm -f $@
+	$(foreach f,$(sort $(all_offending_files)),echo $(f) >> $@;)
diff --git a/core/board_config.mk b/core/board_config.mk
index d674d1a..1a80348 100644
--- a/core/board_config.mk
+++ b/core/board_config.mk
@@ -310,7 +310,8 @@
 
 ###########################################
 # Now we can substitute with the real value of TARGET_COPY_OUT_DEBUG_RAMDISK
-ifneq (,$(filter true,$(BOARD_USES_RECOVERY_AS_BOOT) $(BOARD_GKI_NONAB_COMPAT)))
+ifneq (,$(filter true,$(BOARD_USES_RECOVERY_AS_BOOT) \
+  $(BOARD_GKI_NONAB_COMPAT) $(BOARD_MOVE_RECOVERY_RESOURCES_TO_VENDOR_BOOT)))
 TARGET_COPY_OUT_DEBUG_RAMDISK := debug_ramdisk/first_stage_ramdisk
 TARGET_COPY_OUT_VENDOR_DEBUG_RAMDISK := vendor_debug_ramdisk/first_stage_ramdisk
 TARGET_COPY_OUT_TEST_HARNESS_RAMDISK := test_harness_ramdisk/first_stage_ramdisk
diff --git a/core/definitions.mk b/core/definitions.mk
index 8219f82..0230340 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -2493,15 +2493,25 @@
 # $(2): destination file
 # $(3): message to print on error
 define copy-non-elf-file-checked
-$(2): $(1) $(LLVM_READOBJ)
-	@echo "Copy non-ELF: $$@"
+$(eval check_non_elf_file_timestamp := \
+    $(call intermediates-dir-for,FAKE,check-non-elf-file-timestamps)/$(2).timestamp)
+$(check_non_elf_file_timestamp): $(1) $(LLVM_READOBJ)
+	@echo "Check non-ELF: $$<"
+	$(hide) mkdir -p "$$(dir $$@)"
+	$(hide) rm -f "$$@"
 	$(hide) \
-	    if $(LLVM_READOBJ) -h $$< >/dev/null 2>&1; then \
-	        $(call echo-error,$$@,$(3)); \
-	        $(call echo-error,$$@,found ELF file: $$<); \
+	    if $(LLVM_READOBJ) -h "$$<" >/dev/null 2>&1; then \
+	        $(call echo-error,$(2),$(3)); \
+	        $(call echo-error,$(2),found ELF file: $$<); \
 	        false; \
 	    fi
+	$(hide) touch "$$@"
+
+$(2): $(1) $(check_non_elf_file_timestamp)
+	@echo "Copy non-ELF: $$@"
 	$$(copy-file-to-target)
+
+check-elf-prebuilt-product-copy-files: $(check_non_elf_file_timestamp)
 endef
 
 # The -t option to acp and the -p option to cp is
diff --git a/core/main.mk b/core/main.mk
index d8a0443..3cc3690 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -1303,67 +1303,7 @@
   # Verify the artifact path requirements made by included products.
   is_asan := $(if $(filter address,$(SANITIZE_TARGET)),true)
   ifneq (true,$(or $(is_asan),$(DISABLE_ARTIFACT_PATH_REQUIREMENTS)))
-  # Fakes don't get installed, and NDK stubs aren't installed to device.
-  static_allowed_patterns := $(TARGET_OUT_FAKE)/% $(SOONG_OUT_DIR)/ndk/%
-  # RROs become REQUIRED by the source module, but are always placed on the vendor partition.
-  static_allowed_patterns += %__auto_generated_rro_product.apk
-  static_allowed_patterns += %__auto_generated_rro_vendor.apk
-  # Auto-included targets are not considered
-  static_allowed_patterns += $(call product-installed-files,)
-  # $(PRODUCT_OUT)/apex is where shared libraries in APEXes get installed.
-  # The path can be considered as a fake path, as the shared libraries
-  # are installed there just to have symbols files for them under
-  # $(PRODUCT_OUT)/symbols/apex for debugging purpose. The /apex directory
-  # is never compiled into a filesystem image.
-  static_allowed_patterns += $(PRODUCT_OUT)/apex/%
-  ifeq (true,$(BOARD_USES_SYSTEM_OTHER_ODEX))
-    # Allow system_other odex space optimization.
-    static_allowed_patterns += \
-      $(TARGET_OUT_SYSTEM_OTHER)/%.odex \
-      $(TARGET_OUT_SYSTEM_OTHER)/%.vdex \
-      $(TARGET_OUT_SYSTEM_OTHER)/%.art
-  endif
-
-CERTIFICATE_VIOLATION_MODULES_FILENAME := $(PRODUCT_OUT)/certificate_violation_modules.txt
-$(CERTIFICATE_VIOLATION_MODULES_FILENAME):
-	rm -f $@
-	$(foreach m,$(sort $(CERTIFICATE_VIOLATION_MODULES)), echo $(m) >> $@;)
-$(call dist-for-goals,droidcore,$(CERTIFICATE_VIOLATION_MODULES_FILENAME))
-
-  all_offending_files :=
-  $(foreach makefile,$(ARTIFACT_PATH_REQUIREMENT_PRODUCTS),\
-    $(eval requirements := $(PRODUCTS.$(makefile).ARTIFACT_PATH_REQUIREMENTS)) \
-    $(eval ### Verify that the product only produces files inside its path requirements.) \
-    $(eval allowed := $(PRODUCTS.$(makefile).ARTIFACT_PATH_ALLOWED_LIST)) \
-    $(eval path_patterns := $(call resolve-product-relative-paths,$(requirements),%)) \
-    $(eval allowed_patterns := $(call resolve-product-relative-paths,$(allowed))) \
-    $(eval files := $(call product-installed-files, $(makefile))) \
-    $(eval offending_files := $(filter-out $(path_patterns) $(allowed_patterns) $(static_allowed_patterns),$(files))) \
-    $(call maybe-print-list-and-error,$(offending_files),\
-      $(makefile) produces files outside its artifact path requirement. \
-      Allowed paths are $(subst $(space),$(comma)$(space),$(addsuffix *,$(requirements)))) \
-    $(eval unused_allowed := $(filter-out $(files),$(allowed_patterns))) \
-    $(call maybe-print-list-and-error,$(unused_allowed),$(makefile) includes redundant allowed entries in its artifact path requirement.) \
-    $(eval ### Optionally verify that nothing else produces files inside this artifact path requirement.) \
-    $(eval extra_files := $(filter-out $(files) $(HOST_OUT)/%,$(product_target_FILES))) \
-    $(eval files_in_requirement := $(filter $(path_patterns),$(extra_files))) \
-    $(eval all_offending_files += $(files_in_requirement)) \
-    $(eval allowed := $(PRODUCT_ARTIFACT_PATH_REQUIREMENT_ALLOWED_LIST)) \
-    $(eval allowed_patterns := $(call resolve-product-relative-paths,$(allowed))) \
-    $(eval offending_files := $(filter-out $(allowed_patterns),$(files_in_requirement))) \
-    $(eval enforcement := $(PRODUCT_ENFORCE_ARTIFACT_PATH_REQUIREMENTS)) \
-    $(if $(enforcement),\
-      $(call maybe-print-list-and-error,$(offending_files),\
-        $(INTERNAL_PRODUCT) produces files inside $(makefile)s artifact path requirement. \
-        $(PRODUCT_ARTIFACT_PATH_REQUIREMENT_HINT)) \
-      $(eval unused_allowed := $(if $(filter true strict,$(enforcement)),\
-        $(foreach p,$(allowed_patterns),$(if $(filter $(p),$(extra_files)),,$(p))))) \
-      $(call maybe-print-list-and-error,$(unused_allowed),$(INTERNAL_PRODUCT) includes redundant artifact path requirement allowed list entries.) \
-    ) \
-  )
-$(PRODUCT_OUT)/offending_artifacts.txt:
-	rm -f $@
-	$(foreach f,$(sort $(all_offending_files)),echo $(f) >> $@;)
+    include $(BUILD_SYSTEM)/artifact_path_requirements.mk
   endif
 else
   # We're not doing a full build, and are probably only including
diff --git a/core/soong_config.mk b/core/soong_config.mk
index 8482ac6..61c0452 100644
--- a/core/soong_config.mk
+++ b/core/soong_config.mk
@@ -210,6 +210,9 @@
 $(call add_json_bool, EnforceProductPartitionInterface,  $(PRODUCT_ENFORCE_PRODUCT_PARTITION_INTERFACE))
 $(call add_json_str,  DeviceCurrentApiLevelForVendorModules,  $(BOARD_CURRENT_API_LEVEL_FOR_VENDOR_MODULES))
 
+$(call add_json_bool, EnforceInterPartitionJavaSdkLibrary, $(PRODUCT_ENFORCE_INTER_PARTITION_JAVA_SDK_LIBRARY))
+$(call add_json_list, InterPartitionJavaLibraryAllowList, $(PRODUCT_INTER_PARTITION_JAVA_LIBRARY_ALLOWLIST))
+
 $(call add_json_bool, InstallExtraFlattenedApexes, $(PRODUCT_INSTALL_EXTRA_FLATTENED_APEXES))
 
 $(call add_json_bool, CompressedApex, $(PRODUCT_COMPRESSED_APEX))
diff --git a/core/sysprop.mk b/core/sysprop.mk
index 1c66281..bb19dc5 100644
--- a/core/sysprop.mk
+++ b/core/sysprop.mk
@@ -238,7 +238,7 @@
 endef
 
 gen_from_buildinfo_sh := $(call intermediates-dir-for,PACKAGING,system_build_prop)/buildinfo.prop
-$(gen_from_buildinfo_sh): $(INTERNAL_BUILD_ID_MAKEFILE) $(API_FINGERPRINT)
+$(gen_from_buildinfo_sh): $(INTERNAL_BUILD_ID_MAKEFILE) $(API_FINGERPRINT) | $(BUILD_DATETIME_FILE) $(BUILD_NUMBER_FILE)
 	$(hide) TARGET_BUILD_TYPE="$(TARGET_BUILD_VARIANT)" \
 	        TARGET_BUILD_FLAVOR="$(TARGET_BUILD_FLAVOR)" \
 	        TARGET_DEVICE="$(TARGET_DEVICE)" \
diff --git a/core/tasks/mts.mk b/core/tasks/mts.mk
index e800505..e084856 100644
--- a/core/tasks/mts.mk
+++ b/core/tasks/mts.mk
@@ -13,13 +13,20 @@
 # limitations under the License.
 
 ifneq ($(wildcard test/mts/README.md),)
-test_suite_name := mts
-test_suite_tradefed := mts-tradefed
-test_suite_readme := test/mts/README.md
 
-include $(BUILD_SYSTEM)/tasks/tools/compatibility.mk
+mts_test_suites :=
+mts_test_suites += mts
 
-.PHONY: mts
-mts: $(compatibility_zip)
-$(call dist-for-goals, mts, $(compatibility_zip))
+$(foreach module, $(mts_modules), $(eval mts_test_suites += mts-$(module)))
+
+$(foreach suite, $(mts_test_suites), \
+	$(eval test_suite_name := $(suite)) \
+	$(eval test_suite_tradefed := mts-tradefed) \
+	$(eval test_suite_readme := test/mts/README.md) \
+	$(eval include $(BUILD_SYSTEM)/tasks/tools/compatibility.mk) \
+	$(eval .PHONY: $(suite)) \
+	$(eval $(suite): $(compatibility_zip)) \
+	$(eval $(call dist-for-goals, $(suite), $(compatibility_zip))) \
+)
+
 endif
diff --git a/core/tasks/tools/compatibility.mk b/core/tasks/tools/compatibility.mk
index 66f3b5b..570a39a 100644
--- a/core/tasks/tools/compatibility.mk
+++ b/core/tasks/tools/compatibility.mk
@@ -34,9 +34,7 @@
   $(HOST_OUT_JAVA_LIBRARIES)/tradefed-test-framework.jar \
   $(HOST_OUT_JAVA_LIBRARIES)/loganalysis.jar \
   $(HOST_OUT_JAVA_LIBRARIES)/compatibility-host-util.jar \
-  $(HOST_OUT_JAVA_LIBRARIES)/compatibility-host-util-tests.jar \
-  $(HOST_OUT_JAVA_LIBRARIES)/compatibility-common-util-tests.jar \
-  $(HOST_OUT_JAVA_LIBRARIES)/compatibility-tradefed-tests.jar \
+  $(HOST_OUT_JAVA_LIBRARIES)/compatibility-tradefed.jar \
   $(HOST_OUT_JAVA_LIBRARIES)/$(test_suite_tradefed).jar \
   $(HOST_OUT_JAVA_LIBRARIES)/$(test_suite_tradefed)-tests.jar \
   $(HOST_OUT_EXECUTABLES)/$(test_suite_tradefed) \
diff --git a/rbesetup.sh b/rbesetup.sh
index 410ed86..ec39e6e 100644
--- a/rbesetup.sh
+++ b/rbesetup.sh
@@ -65,7 +65,10 @@
 function _set_rbe_vars() {
   unset USE_GOMA
   export USE_RBE="true"
-  export RBE_CXX_EXEC_STRATEGY="remote_local_fallback"
+  export RBE_CXX_EXEC_STRATEGY="racing"
+  export RBE_JAVAC_EXEC_STRATEGY="racing"
+  export RBE_R8_EXEC_STRATEGY="racing"
+  export RBE_D8_EXEC_STRATEGY="racing"
   export RBE_use_unified_cas_ops="true"
   export RBE_JAVAC=1
   export RBE_R8=1
diff --git a/target/board/generic_arm64/device.mk b/target/board/generic_arm64/device.mk
index 7b16aea..7c19279 100644
--- a/target/board/generic_arm64/device.mk
+++ b/target/board/generic_arm64/device.mk
@@ -30,7 +30,5 @@
     kernel/prebuilts/5.4/arm64/kernel-5.4-lz4:kernel-5.4-lz4-allsyms
 endif
 
-PRODUCT_PACKAGES += e2fsck_ramdisk
-
 PRODUCT_BUILD_VENDOR_BOOT_IMAGE := false
 PRODUCT_BUILD_RECOVERY_IMAGE := false
diff --git a/target/product/runtime_libart.mk b/target/product/runtime_libart.mk
index ec30527..687e9f6 100644
--- a/target/product/runtime_libart.mk
+++ b/target/product/runtime_libart.mk
@@ -70,6 +70,11 @@
 # or if it is empty speed-profile is equivalent to (quicken + empty app image).
 PRODUCT_SYSTEM_PROPERTIES += \
     pm.dexopt.install?=speed-profile \
+    pm.dexopt.install-fast?=skip \
+    pm.dexopt.install-bulk?=speed-profile \
+    pm.dexopt.install-bulk-secondary?=verify \
+    pm.dexopt.install-bulk-downgraded?=verify \
+    pm.dexopt.install-bulk-secondary-downgraded?=extract \
     pm.dexopt.bg-dexopt?=speed-profile \
     pm.dexopt.ab-ota?=speed-profile \
     pm.dexopt.inactive?=verify \
diff --git a/target/product/virtual_ab_ota/README.md b/target/product/virtual_ab_ota/README.md
index c1d0d7d..2d40c03 100644
--- a/target/product/virtual_ab_ota/README.md
+++ b/target/product/virtual_ab_ota/README.md
@@ -8,6 +8,8 @@
 launch.mk
   |- retrofit.mk
   |- plus_non_ab.mk
+
+launch_with_vendor_ramdisk.mk
   |- compression.mk
 
 compression_retrofit.mk
diff --git a/target/product/virtual_ab_ota/compression.mk b/target/product/virtual_ab_ota/compression.mk
index 2251187..1dd8643 100644
--- a/target/product/virtual_ab_ota/compression.mk
+++ b/target/product/virtual_ab_ota/compression.mk
@@ -14,7 +14,7 @@
 # limitations under the License.
 #
 
-$(call inherit-product, $(SRC_TARGET_DIR)/product/virtual_ab_ota/launch.mk)
+$(call inherit-product, $(SRC_TARGET_DIR)/product/virtual_ab_ota/launch_with_vendor_ramdisk.mk)
 
 PRODUCT_VENDOR_PROPERTIES += ro.virtual_ab.compression.enabled=true
 
diff --git a/target/product/virtual_ab_ota/launch_with_vendor_ramdisk.mk b/target/product/virtual_ab_ota/launch_with_vendor_ramdisk.mk
new file mode 100644
index 0000000..bc81b33
--- /dev/null
+++ b/target/product/virtual_ab_ota/launch_with_vendor_ramdisk.mk
@@ -0,0 +1,26 @@
+#
+# 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.
+#
+
+# Devices launching with Virtual A/B and has a vendor_boot partition is
+# preferred to inherit from this makefile instead of launch.mk.
+
+PRODUCT_VIRTUAL_AB_OTA := true
+
+PRODUCT_VENDOR_PROPERTIES += ro.virtual_ab.enabled=true
+
+PRODUCT_PACKAGES += \
+    linker.vendor_ramdisk \
+    e2fsck.vendor_ramdisk \
diff --git a/tools/fs_config/fs_config.go b/tools/fs_config/fs_config.go
index 16bcefa..4c324fb 100644
--- a/tools/fs_config/fs_config.go
+++ b/tools/fs_config/fs_config.go
@@ -48,10 +48,10 @@
 		path := android.PathForModuleGen(ctx, "empty")
 		t.paths = android.Paths{path}
 
-		rule := android.NewRuleBuilder()
+		rule := android.NewRuleBuilder(pctx, ctx)
 		rule.Command().Text("rm -rf").Output(path)
 		rule.Command().Text("touch").Output(path)
-		rule.Build(pctx, ctx, "fs_config_empty", "create empty file")
+		rule.Build("fs_config_empty", "create empty file")
 	}
 }
 
diff --git a/tools/releasetools/add_img_to_target_files.py b/tools/releasetools/add_img_to_target_files.py
index d836d65..5f35d78 100644
--- a/tools/releasetools/add_img_to_target_files.py
+++ b/tools/releasetools/add_img_to_target_files.py
@@ -51,6 +51,7 @@
 import os
 import shlex
 import shutil
+import stat
 import sys
 import uuid
 import zipfile
@@ -330,6 +331,9 @@
 
   # AVB-sign the image as needed.
   if OPTIONS.info_dict.get("avb_enable") == "true":
+    # Signing requires +w
+    os.chmod(img.name, os.stat(img.name).st_mode | stat.S_IWUSR)
+
     avbtool = OPTIONS.info_dict["avb_avbtool"]
     part_size = OPTIONS.info_dict["dtbo_size"]
     # The AVB hash footer will be replaced if already present.
diff --git a/tools/releasetools/build_image.py b/tools/releasetools/build_image.py
index 6487b9b..fbed77d 100755
--- a/tools/releasetools/build_image.py
+++ b/tools/releasetools/build_image.py
@@ -417,7 +417,7 @@
   fs_type = prop_dict.get("fs_type", "")
 
   fs_spans_partition = True
-  if fs_type.startswith("squash"):
+  if fs_type.startswith("squash") or fs_type.startswith("erofs"):
     fs_spans_partition = False
 
   # Get a builder for creating an image that's to be verified by Verified Boot,
@@ -427,7 +427,16 @@
   if (prop_dict.get("use_dynamic_partition_size") == "true" and
       "partition_size" not in prop_dict):
     # If partition_size is not defined, use output of `du' + reserved_size.
-    size = GetDiskUsage(in_dir)
+    # For compressed file system, it's better to use the compressed size to avoid wasting space.
+    if fs_type.startswith("erofs"):
+      tmp_dict = prop_dict.copy()
+      if "erofs_sparse_flag" in tmp_dict:
+        tmp_dict.pop("erofs_sparse_flag")
+      BuildImageMkfs(in_dir, tmp_dict, out_file, target_out, fs_config)
+      size = GetDiskUsage(out_file)
+      os.remove(out_file)
+    else:
+      size = GetDiskUsage(in_dir)
     logger.info(
         "The tree size of %s is %d MB.", in_dir, size // BYTES_IN_MB)
     # If not specified, give us 16MB margin for GetDiskUsage error ...
diff --git a/tools/signapk/Android.bp b/tools/signapk/Android.bp
index f5b2ba7..b90f010 100644
--- a/tools/signapk/Android.bp
+++ b/tools/signapk/Android.bp
@@ -27,7 +27,7 @@
         "conscrypt-unbundled",
     ],
 
-    required: ["libconscrypt_openjdk_jni"],
+    jni_libs: ["libconscrypt_openjdk_jni"],
 
     // The post-build signing tools need signapk.jar (and its shared libraries,
     // handled in their own Android.bp files)