diff --git a/core/main.mk b/core/main.mk
index 7b3584e..5a591f9 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -2157,10 +2157,12 @@
 #       See the second foreach loop in the rule of sbom-metadata.csv for the detailed info of static libraries collected in _all_static_libs.
 #   is_static_lib: whether the file is a static library
 
+metadata_list := $(OUT_DIR)/.module_paths/METADATA.list
+metadata_files := $(subst $(newline),$(space),$(file <$(metadata_list)))
 # (TODO: b/272358583 find another way of always rebuilding this target)
 # Remove the sbom-metadata.csv whenever makefile is evaluated
 $(shell rm $(PRODUCT_OUT)/sbom-metadata.csv >/dev/null 2>&1)
-$(PRODUCT_OUT)/sbom-metadata.csv: $(installed_files)
+$(PRODUCT_OUT)/sbom-metadata.csv: $(installed_files) $(metadata_list) $(metadata_files)
 	rm -f $@
 	echo installed_file,module_path,soong_module_type,is_prebuilt_make_module,product_copy_files,kernel_module_copy_files,is_platform_generated,build_output_path,static_libraries,whole_static_libraries,is_static_lib >> $@
 	$(eval _all_static_libs :=)
@@ -2215,17 +2217,47 @@
 
 $(call dist-for-goals,droid,$(PRODUCT_OUT)/sbom.spdx.json:sbom/sbom.spdx.json)
 else
-apps_only_sbom_files := $(sort $(patsubst %,%.spdx.json,$(filter %.apk,$(apps_only_installed_files))))
-$(apps_only_sbom_files): $(PRODUCT_OUT)/sbom-metadata.csv $(GEN_SBOM)
-	rm -rf $@
-	$(GEN_SBOM) --output_file $@ --metadata $(PRODUCT_OUT)/sbom-metadata.csv --build_version $(BUILD_FINGERPRINT_FROM_FILE) --product_mfr "$(PRODUCT_MANUFACTURER)" --unbundled_apk
+# Create build rules for generating SBOMs of unbundled APKs and APEXs
+# $1: sbom file
+# $2: sbom fragment file
+# $3: installed file
+# $4: sbom-metadata.csv file
+define generate-app-sbom
+$(eval _path_on_device := $(patsubst $(PRODUCT_OUT)/%,%,$(3)))
+$(eval _module_name := $(ALL_INSTALLED_FILES.$(3)))
+$(eval _module_path := $(strip $(sort $(ALL_MODULES.$(_module_name).PATH))))
+$(eval _soong_module_type := $(strip $(sort $(ALL_MODULES.$(_module_name).SOONG_MODULE_TYPE))))
+$(eval _dep_modules := $(filter %.$(_module_name),$(ALL_MODULES)) $(filter %.$(_module_name)$(TARGET_2ND_ARCH_MODULE_SUFFIX),$(ALL_MODULES)))
+$(eval _is_apex := $(filter %.apex,$(3)))
+
+$(4): $(3) $(metadata_list) $(metadata_files)
+	rm -rf $$@
+	echo installed_file,module_path,soong_module_type,is_prebuilt_make_module,product_copy_files,kernel_module_copy_files,is_platform_generated,build_output_path,static_libraries,whole_static_libraries,is_static_lib >> $$@
+	echo /$(_path_on_device),$(_module_path),$(_soong_module_type),,,,,$(3),,, >> $$@
+	$(if $(filter %.apex,$(3)),\
+	  $(foreach m,$(_dep_modules),\
+	    echo $(patsubst $(PRODUCT_OUT)/apex/$(_module_name)/%,%,$(ALL_MODULES.$m.INSTALLED)),$(sort $(ALL_MODULES.$m.PATH)),$(sort $(ALL_MODULES.$m.SOONG_MODULE_TYPE)),,,,,$(strip $(ALL_MODULES.$m.BUILT)),,, >> $$@;))
+
+$(2): $(1)
+$(1): $(4) $(GEN_SBOM)
+	rm -rf $$@
+	$(GEN_SBOM) --output_file $$@ --metadata $(4) --build_version $$(BUILD_FINGERPRINT_FROM_FILE) --product_mfr "$(PRODUCT_MANUFACTURER)" --json $(if $(filter %.apk,$(3)),--unbundled_apk,--unbundled_apex)
+endef
+
+apps_only_sbom_files :=
+apps_only_fragment_files :=
+$(foreach f,$(filter %.apk %.apex,$(installed_files)), \
+  $(eval _metadata_csv_file := $(patsubst %,%-sbom-metadata.csv,$f)) \
+  $(eval _sbom_file := $(patsubst %,%.spdx.json,$f)) \
+  $(eval _fragment_file := $(patsubst %,%-fragment.spdx,$f)) \
+  $(eval apps_only_sbom_files += $(_sbom_file)) \
+  $(eval apps_only_fragment_files += $(_fragment_file)) \
+  $(eval $(call generate-app-sbom,$(_sbom_file),$(_fragment_file),$f,$(_metadata_csv_file))) \
+)
 
 sbom: $(apps_only_sbom_files)
 
-$(foreach f,$(apps_only_sbom_files),$(eval $(patsubst %.spdx.json,%-fragment.spdx,$f): $f))
-apps_only_fragment_files := $(patsubst %.spdx.json,%-fragment.spdx,$(apps_only_sbom_files))
 $(foreach f,$(apps_only_fragment_files),$(eval apps_only_fragment_dist_files += :sbom/$(notdir $f)))
-
 $(foreach f,$(apps_only_sbom_files),$(eval apps_only_sbom_dist_files += :sbom/$(notdir $f)))
 $(call dist-for-goals,apps_only,$(join $(apps_only_sbom_files),$(apps_only_sbom_dist_files)) $(join $(apps_only_fragment_files),$(apps_only_fragment_dist_files)))
 endif
diff --git a/envsetup.sh b/envsetup.sh
index d292dbb..f4755dd 100644
--- a/envsetup.sh
+++ b/envsetup.sh
@@ -62,8 +62,8 @@
               invocations of 'm' etc.
 - tapas:      tapas [<App1> <App2> ...] [arm|x86|arm64|x86_64] [eng|userdebug|user]
               Sets up the build environment for building unbundled apps (APKs).
-- banchan:    banchan <module1> [<module2> ...] [arm|x86|arm64|x86_64|arm64_only|x86_64only] \
-                      [eng|userdebug|user]
+- banchan:    banchan <module1> [<module2> ...] \
+                      [arm|x86|arm64|riscv64|x86_64|arm64_only|x86_64only] [eng|userdebug|user]
               Sets up the build environment for building unbundled modules (APEXes).
 - croot:      Changes directory to the top of the tree, or a subdirectory thereof.
 - m:          Makes from the top of the tree.
@@ -952,9 +952,9 @@
 function banchan()
 {
     local showHelp="$(echo $* | xargs -n 1 echo | \grep -E '^(help)$' | xargs)"
-    local product="$(echo $* | xargs -n 1 echo | \grep -E '^(.*_)?(arm|x86|arm64|x86_64|arm64only|x86_64only)$' | xargs)"
+    local product="$(echo $* | xargs -n 1 echo | \grep -E '^(.*_)?(arm|x86|arm64|riscv64|x86_64|arm64only|x86_64only)$' | xargs)"
     local variant="$(echo $* | xargs -n 1 echo | \grep -E '^(user|userdebug|eng)$' | xargs)"
-    local apps="$(echo $* | xargs -n 1 echo | \grep -E -v '^(user|userdebug|eng|(.*_)?(arm|x86|arm64|x86_64))$' | xargs)"
+    local apps="$(echo $* | xargs -n 1 echo | \grep -E -v '^(user|userdebug|eng|(.*_)?(arm|x86|arm64|riscv64|x86_64))$' | xargs)"
 
     if [ "$showHelp" != "" ]; then
       $(gettop)/build/make/banchanHelp.sh
@@ -980,6 +980,7 @@
       arm)    product=module_arm;;
       x86)    product=module_x86;;
       arm64)  product=module_arm64;;
+      riscv64) product=module_riscv64;;
       x86_64) product=module_x86_64;;
       arm64only)  product=module_arm64only;;
       x86_64only) product=module_x86_64only;;
diff --git a/target/board/module_riscv64/BoardConfig.mk b/target/board/module_riscv64/BoardConfig.mk
new file mode 100644
index 0000000..8bc1999
--- /dev/null
+++ b/target/board/module_riscv64/BoardConfig.mk
@@ -0,0 +1,22 @@
+# Copyright (C) 2023 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 := riscv64
+TARGET_ARCH_VARIANT :=
+TARGET_CPU_VARIANT := generic
+TARGET_CPU_ABI := riscv64
+
+# Temporary hack while prebuilt modules are missing riscv64.
+ALLOW_MISSING_DEPENDENCIES := true
diff --git a/target/board/module_riscv64/README.md b/target/board/module_riscv64/README.md
new file mode 100644
index 0000000..edebaa9
--- /dev/null
+++ b/target/board/module_riscv64/README.md
@@ -0,0 +1,2 @@
+This device is suitable for an unbundled module targeted specifically to a
+riscv64 device. This is a 64-bit only device (no 32-bit support).
diff --git a/target/product/AndroidProducts.mk b/target/product/AndroidProducts.mk
index 133dc73..473a275 100644
--- a/target/product/AndroidProducts.mk
+++ b/target/product/AndroidProducts.mk
@@ -83,6 +83,7 @@
     $(LOCAL_DIR)/module_arm.mk \
     $(LOCAL_DIR)/module_arm64.mk \
     $(LOCAL_DIR)/module_arm64only.mk \
+    $(LOCAL_DIR)/module_riscv64.mk \
     $(LOCAL_DIR)/module_x86.mk \
     $(LOCAL_DIR)/module_x86_64.mk \
     $(LOCAL_DIR)/module_x86_64only.mk \
diff --git a/target/product/cfi-common.mk b/target/product/cfi-common.mk
index 559963c..5cc7ae5 100644
--- a/target/product/cfi-common.mk
+++ b/target/product/cfi-common.mk
@@ -33,7 +33,7 @@
     hardware/qcom/wlan/wcn6740/qcwcn/wpa_supplicant_8_lib \
     hardware/interfaces/keymaster \
     hardware/interfaces/security \
-    packages/modules/Bluetooth/system \
+    packages/modules/Bluetooth \
     system/chre \
     system/core/libnetutils \
     system/libziparchive \
diff --git a/target/product/gsi_release.mk b/target/product/gsi_release.mk
index 375b7cb..e39af92 100644
--- a/target/product/gsi_release.mk
+++ b/target/product/gsi_release.mk
@@ -80,3 +80,6 @@
 # Additional settings used in all GSI builds
 PRODUCT_PRODUCT_PROPERTIES += \
     ro.crypto.metadata_init_delete_all_keys.enabled=false \
+
+# Window Extensions
+$(call inherit-product, $(SRC_TARGET_DIR)/product/window_extensions.mk)
\ No newline at end of file
diff --git a/target/product/module_riscv64.mk b/target/product/module_riscv64.mk
new file mode 100644
index 0000000..4fd38c0
--- /dev/null
+++ b/target/product/module_riscv64.mk
@@ -0,0 +1,21 @@
+#
+# Copyright (C) 2023 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+$(call inherit-product, $(SRC_TARGET_DIR)/product/module_common.mk)
+$(call inherit-product, $(SRC_TARGET_DIR)/product/core_64_bit_only.mk)
+
+PRODUCT_NAME := module_riscv64
+PRODUCT_DEVICE := module_riscv64
diff --git a/tools/aconfig/src/codegen_java.rs b/tools/aconfig/src/codegen_java.rs
index 15eb2d6..8ab6ffa 100644
--- a/tools/aconfig/src/codegen_java.rs
+++ b/tools/aconfig/src/codegen_java.rs
@@ -233,8 +233,9 @@
         let expected_featureflagsimpl_content = r#"
         package com.android.aconfig.test;
         import static java.util.stream.Collectors.toMap;
-        import java.util.stream.Stream;
         import java.util.HashMap;
+        import java.util.Map;
+        import java.util.stream.Stream;
         public final class FeatureFlagsImpl implements FeatureFlags {
             @Override
             public boolean disabledRo() {
@@ -258,6 +259,11 @@
                 }
                 this.mFlagMap.put(flagName, value);
             }
+            public void resetAll() {
+                for (Map.Entry entry : mFlagMap.entrySet()) {
+                    entry.setValue(null);
+                }
+            }
             private boolean getFlag(String flagName) {
                 Boolean value = this.mFlagMap.get(flagName);
                 if (value == null) {
diff --git a/tools/aconfig/templates/FeatureFlags.java.template b/tools/aconfig/templates/FeatureFlags.java.template
index b9e2cc7..e0f201f 100644
--- a/tools/aconfig/templates/FeatureFlags.java.template
+++ b/tools/aconfig/templates/FeatureFlags.java.template
@@ -1,7 +1,7 @@
 package {package_name};
 
 public interface FeatureFlags \{
-    {{ for item in class_elements}}
+{{ for item in class_elements}}
     boolean {item.method_name}();
-    {{ endfor }}
-}
\ No newline at end of file
+{{ endfor }}
+}
diff --git a/tools/aconfig/templates/FeatureFlagsImpl.java.template b/tools/aconfig/templates/FeatureFlagsImpl.java.template
index dafd99e..082d476 100644
--- a/tools/aconfig/templates/FeatureFlagsImpl.java.template
+++ b/tools/aconfig/templates/FeatureFlagsImpl.java.template
@@ -2,15 +2,16 @@
 {{ -if is_test_mode }}
 import static java.util.stream.Collectors.toMap;
 
-import java.util.stream.Stream;
 import java.util.HashMap;
+import java.util.Map;
+import java.util.stream.Stream;
 {{ else}}
 {{ if is_read_write- }}
 import android.provider.DeviceConfig;
 {{ -endif- }}
 {{ endif }}
 public final class FeatureFlagsImpl implements FeatureFlags \{
-    {{ for item in class_elements}}
+{{ for item in class_elements}}
     @Override
     public boolean {item.method_name}() \{
         {{ -if not is_test_mode- }}
@@ -20,16 +21,15 @@
             "{item.device_config_flag}",
             {item.default_value}
         );
-        {{ else }}
+        {{ -else }}
         return {item.default_value};
         {{ -endif- }}
         {{ else }}
         return getFlag(Flags.FLAG_{item.flag_name_constant_suffix});
         {{ -endif }}
     }
-    {{ endfor }}
-
-    {{ if is_test_mode- }}
+{{ endfor- }}
+{{ if is_test_mode }}
     public void setFlag(String flagName, boolean value) \{
         if (!this.mFlagMap.containsKey(flagName)) \{
             throw new IllegalArgumentException("no such flag" + flagName);
@@ -37,6 +37,12 @@
         this.mFlagMap.put(flagName, value);
     }
 
+    public void resetAll() \{
+        for (Map.Entry entry : mFlagMap.entrySet()) \{
+            entry.setValue(null);
+        }
+    }
+
     private boolean getFlag(String flagName) \{
         Boolean value = this.mFlagMap.get(flagName);
         if (value == null) \{
@@ -55,7 +61,5 @@
             (map, elem) -> map.put(elem, null),
             HashMap::putAll
         );
-    {{ -endif }}
+{{ -endif }}
 }
-
-
diff --git a/tools/aconfig/templates/Flags.java.template b/tools/aconfig/templates/Flags.java.template
index eef98eb..c244b15 100644
--- a/tools/aconfig/templates/Flags.java.template
+++ b/tools/aconfig/templates/Flags.java.template
@@ -1,15 +1,15 @@
 package {package_name};
 
 public final class Flags \{
-    {{- for item in class_elements}}
+{{- for item in class_elements}}
     public static final String FLAG_{item.flag_name_constant_suffix} = "{item.device_config_flag}";
-    {{- endfor }}
-    {{ for item in class_elements}}
+{{- endfor }}
+{{ for item in class_elements}}
     public static boolean {item.method_name}() \{
         return FEATURE_FLAGS.{item.method_name}();
     }
-    {{ endfor }}
-    {{ if is_test_mode }}
+{{ endfor }}
+{{ -if is_test_mode }}
     public static void setFeatureFlagsImpl(FeatureFlags featureFlags) \{
         Flags.FEATURE_FLAGS = featureFlags;
     }
@@ -17,8 +17,7 @@
     public static void unsetFeatureFlagsImpl() \{
         Flags.FEATURE_FLAGS = null;
     }
-    {{ -endif}}
-
+{{ endif}}
     private static FeatureFlags FEATURE_FLAGS{{ -if not is_test_mode }} = new FeatureFlagsImpl(){{ -endif- }};
 
 }
diff --git a/tools/list_files.py b/tools/list_files.py
index 3afa81f..4f666aa 100644
--- a/tools/list_files.py
+++ b/tools/list_files.py
@@ -18,6 +18,7 @@
 from glob import glob
 from pathlib import Path
 from os.path import join, relpath
+from itertools import chain
 import argparse
 
 class FileLister:
@@ -27,7 +28,8 @@
         self.folder_dir = args.dir
         self.extensions = [e if e.startswith(".") else "." + e for e in args.extensions]
         self.root = args.root
-        self.files_list = list()
+        self.files_list : List[str] = list()
+        self.classes = args.classes
 
     def get_files(self) -> None:
         """Get all files directory in the input directory including the files in the subdirectories
@@ -61,6 +63,26 @@
     def list(self) -> None:
         self.get_files()
         self.files_list = [f for f in self.files_list if not self.extensions or Path(f).suffix in self.extensions]
+
+        # If files_list is as below:
+        # A/B/C.java
+        # A/B/D.java
+        # A/B/E.txt
+        # --classes flag converts files_list in the following format:
+        # A/B/C.class
+        # A/B/C$*.class
+        # A/B/D.class
+        # A/B/D$*.class
+        # Additional `$*`-suffixed line is appended after each line
+        # to take multiple top level classes in a single java file into account.
+        # Note that non-java files in files_list are filtered out.
+        if self.classes:
+            self.files_list = list(chain.from_iterable([
+                (class_files := str(Path(ff).with_suffix(".class")),
+                 class_files.replace(".class", "$*.class"))
+                 for ff in self.files_list if ff.endswith(".java")
+            ]))
+
         self.write()
 
     def write(self) -> None:
@@ -95,6 +117,10 @@
                         help="optional directory to replace the root directories of output.")
     parser.add_argument('--extensions', nargs='*', default=list(), dest='extensions',
                         help="Extensions to include in the output. If not set, all files are included")
+    parser.add_argument('--classes', dest='classes', action=argparse.BooleanOptionalAction,
+                        help="Optional flag. If passed, outputs a list of pattern of class files \
+                                that will be produced by compiling java files in the input dir. \
+                                Non-java files in the input directory will be ignored.")
 
     args = parser.parse_args()