diff --git a/core/Makefile b/core/Makefile
index ede0fc6..37e6477 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -3688,7 +3688,9 @@
 # Protected VM firmware image
 ifeq ($(BOARD_USES_PVMFWIMAGE),true)
 INSTALLED_PVMFWIMAGE_TARGET := $(PRODUCT_OUT)/pvmfw.img
+INSTALLED_PVMFW_EMBEDDED_AVBKEY_TARGET := $(PRODUCT_OUT)/pvmfw_embedded.avbpubkey
 INTERNAL_PREBUILT_PVMFWIMAGE := packages/modules/Virtualization/pvmfw/pvmfw.img
+INTERNAL_PVMFW_EMBEDDED_AVBKEY := external/avb/test/data/testkey_rsa4096_pub.bin
 
 ifdef BOARD_PREBUILT_PVMFWIMAGE
 PREBUILT_PVMFWIMAGE_TARGET := $(BOARD_PREBUILT_PVMFWIMAGE)
@@ -3708,6 +3710,10 @@
 $(eval $(call copy-one-file,$(PREBUILT_PVMFWIMAGE_TARGET),$(INSTALLED_PVMFWIMAGE_TARGET)))
 endif
 
+$(INSTALLED_PVMFWIMAGE_TARGET): $(INSTALLED_PVMFW_EMBEDDED_AVBKEY_TARGET)
+
+$(eval $(call copy-one-file,$(INTERNAL_PVMFW_EMBEDDED_AVBKEY),$(INSTALLED_PVMFW_EMBEDDED_AVBKEY_TARGET)))
+
 endif # BOARD_USES_PVMFWIMAGE
 
 # Returns a list of image targets corresponding to the given list of partitions. For example, it
@@ -5294,6 +5300,7 @@
 	    $(INSTALLED_CACHEIMAGE_TARGET) \
 	    $(INSTALLED_DTBOIMAGE_TARGET) \
 	    $(INSTALLED_PVMFWIMAGE_TARGET) \
+	    $(INSTALLED_PVMFW_EMBEDDED_AVBKEY_TARGET) \
 	    $(INSTALLED_CUSTOMIMAGES_TARGET) \
 	    $(INSTALLED_ANDROID_INFO_TXT_TARGET) \
 	    $(INSTALLED_KERNEL_TARGET) \
@@ -5631,6 +5638,7 @@
 ifeq ($(BOARD_USES_PVMFWIMAGE),true)
 	$(hide) mkdir -p $(zip_root)/PREBUILT_IMAGES
 	$(hide) cp $(INSTALLED_PVMFWIMAGE_TARGET) $(zip_root)/PREBUILT_IMAGES/
+	$(hide) cp $(INSTALLED_PVMFW_EMBEDDED_AVBKEY_TARGET) $(zip_root)/PREBUILT_IMAGES/
 endif
 ifdef BOARD_PREBUILT_BOOTLOADER
 	$(hide) mkdir -p $(zip_root)/IMAGES
diff --git a/core/base_rules.mk b/core/base_rules.mk
index c554c80..e26f456 100644
--- a/core/base_rules.mk
+++ b/core/base_rules.mk
@@ -875,6 +875,16 @@
 endif  # LOCAL_UNINSTALLABLE_MODULE
 endif  # LOCAL_COMPATIBILITY_SUITE
 
+my_supported_variant :=
+ifeq ($(my_host_cross),true)
+  my_supported_variant := HOST_CROSS
+else
+  ifdef LOCAL_IS_HOST_MODULE
+    my_supported_variant := HOST
+  else
+    my_supported_variant := DEVICE
+  endif
+endif
 ###########################################################
 ## Add test module to ALL_DISABLED_PRESUBMIT_TESTS if LOCAL_PRESUBMIT_DISABLED is set to true.
 ###########################################################
@@ -1001,6 +1011,10 @@
     $(ALL_MODULES.$(my_register_name).TEST_DATA_BINS) $(LOCAL_TEST_DATA_BINS)
 endif
 
+ALL_MODULES.$(my_register_name).SUPPORTED_VARIANTS := \
+  $(ALL_MODULES.$(my_register_name).SUPPORTED_VARIANTS) \
+  $(filter-out $(ALL_MODULES.$(my_register_name).SUPPORTED_VARIANTS),$(my_supported_variant))
+
 ##########################################################################
 ## When compiling against the VNDK, add the .vendor or .product suffix to
 ## required modules.
diff --git a/core/tasks/module-info.mk b/core/tasks/module-info.mk
index e5ddb1a..8097535 100644
--- a/core/tasks/module-info.mk
+++ b/core/tasks/module-info.mk
@@ -27,6 +27,7 @@
 			'"data": [$(foreach w,$(sort $(ALL_MODULES.$(m).TEST_DATA)),"$(w)", )], ' \
 			'"runtime_dependencies": [$(foreach w,$(sort $(ALL_MODULES.$(m).LOCAL_RUNTIME_LIBRARIES)),"$(w)", )], ' \
 			'"data_dependencies": [$(foreach w,$(sort $(ALL_MODULES.$(m).TEST_DATA_BINS)),"$(w)", )], ' \
+			'"supported_variants": [$(foreach w,$(sort $(ALL_MODULES.$(m).SUPPORTED_VARIANTS)),"$(w)", )], ' \
 			'},\n' \
 	 ) | sed -e 's/, *\]/]/g' -e 's/, *\}/ }/g' -e '$$s/,$$//' >> $@
 	$(hide) echo '}' >> $@
diff --git a/tools/releasetools/check_ota_package_signature.py b/tools/releasetools/check_ota_package_signature.py
index 58510a5..b395c19 100755
--- a/tools/releasetools/check_ota_package_signature.py
+++ b/tools/releasetools/check_ota_package_signature.py
@@ -181,8 +181,5 @@
 if __name__ == '__main__':
   try:
     main()
-  except AssertionError as err:
-    print('\n    ERROR: %s\n' % (err,))
-    sys.exit(1)
   finally:
     common.Cleanup()
diff --git a/tools/releasetools/check_partition_sizes.py b/tools/releasetools/check_partition_sizes.py
index eaed07e..738d77d 100644
--- a/tools/releasetools/check_partition_sizes.py
+++ b/tools/releasetools/check_partition_sizes.py
@@ -300,8 +300,5 @@
   try:
     common.CloseInheritedPipes()
     main(sys.argv[1:])
-  except common.ExternalError:
-    logger.exception("\n   ERROR:\n")
-    sys.exit(1)
   finally:
     common.Cleanup()
diff --git a/tools/releasetools/check_target_files_vintf.py b/tools/releasetools/check_target_files_vintf.py
index 876e399..4a2a905 100755
--- a/tools/releasetools/check_target_files_vintf.py
+++ b/tools/releasetools/check_target_files_vintf.py
@@ -286,8 +286,5 @@
   try:
     common.CloseInheritedPipes()
     main(sys.argv[1:])
-  except common.ExternalError:
-    logger.exception('\n   ERROR:\n')
-    sys.exit(1)
   finally:
     common.Cleanup()
diff --git a/tools/releasetools/img_from_target_files.py b/tools/releasetools/img_from_target_files.py
index 0b2b187..76da89c 100755
--- a/tools/releasetools/img_from_target_files.py
+++ b/tools/releasetools/img_from_target_files.py
@@ -251,8 +251,5 @@
   try:
     common.CloseInheritedPipes()
     main(sys.argv[1:])
-  except common.ExternalError as e:
-    logger.exception('\n   ERROR:\n')
-    sys.exit(1)
   finally:
     common.Cleanup()
diff --git a/tools/releasetools/merge_target_files.py b/tools/releasetools/merge_target_files.py
index 1318e37..7324b07 100755
--- a/tools/releasetools/merge_target_files.py
+++ b/tools/releasetools/merge_target_files.py
@@ -1432,6 +1432,7 @@
     if rebuild_recovery:
       copy_recovery_file('etc/recovery.img')
       copy_recovery_file('bin/install-recovery.sh')
+      copy_recovery_file('recovery-from-boot.p')
 
 
 def generate_super_empty_image(target_dir, output_super_empty):
diff --git a/tools/releasetools/sign_apex.py b/tools/releasetools/sign_apex.py
index 01ee80b..722359b 100755
--- a/tools/releasetools/sign_apex.py
+++ b/tools/releasetools/sign_apex.py
@@ -175,8 +175,5 @@
 if __name__ == '__main__':
   try:
     main(sys.argv[1:])
-  except common.ExternalError:
-    logger.exception("\n   ERROR:\n")
-    sys.exit(1)
   finally:
     common.Cleanup()
diff --git a/tools/releasetools/sign_target_files_apks.py b/tools/releasetools/sign_target_files_apks.py
index e06f4e6..054315f 100755
--- a/tools/releasetools/sign_target_files_apks.py
+++ b/tools/releasetools/sign_target_files_apks.py
@@ -688,6 +688,39 @@
         print("    Rewriting AVB public key of system_other in /product")
         common.ZipWrite(output_tf_zip, public_key, filename)
 
+    # Updates pvmfw embedded public key with the virt APEX payload key.
+    elif filename == "PREBUILT_IMAGES/pvmfw.img":
+      # Find the name of the virt APEX in the target files.
+      namelist = input_tf_zip.namelist()
+      apex_gen = (GetApexFilename(f) for f in namelist if IsApexFile(f))
+      virt_apex_re = re.compile("^com\.([^\.]+\.)?android\.virt\.apex$")
+      virt_apex = next((a for a in apex_gen if virt_apex_re.match(a)), None)
+      if not virt_apex:
+        print("Removing %s from ramdisk: virt APEX not found" % filename)
+      else:
+        print("Replacing %s embedded key with %s key" % (filename, virt_apex))
+        # Get the current and new embedded keys.
+        payload_key, container_key, sign_tool = apex_keys[virt_apex]
+        new_pubkey_path = common.ExtractAvbPublicKey(
+            misc_info['avb_avbtool'], payload_key)
+        with open(new_pubkey_path, 'rb') as f:
+          new_pubkey = f.read()
+        pubkey_info = copy.copy(
+            input_tf_zip.getinfo("PREBUILT_IMAGES/pvmfw_embedded.avbpubkey"))
+        old_pubkey = input_tf_zip.read(pubkey_info.filename)
+        # Validate the keys and image.
+        if len(old_pubkey) != len(new_pubkey):
+          raise common.ExternalError("pvmfw embedded public key size mismatch")
+        pos = data.find(old_pubkey)
+        if pos == -1:
+          raise common.ExternalError("pvmfw embedded public key not found")
+        # Replace the key and copy new files.
+        new_data = data[:pos] + new_pubkey + data[pos+len(old_pubkey):]
+        common.ZipWriteStr(output_tf_zip, out_info, new_data)
+        common.ZipWriteStr(output_tf_zip, pubkey_info, new_pubkey)
+    elif filename == "PREBUILT_IMAGES/pvmfw_embedded.avbpubkey":
+      pass
+
     # Should NOT sign boot-debug.img.
     elif filename in (
         "BOOT/RAMDISK/force_debuggable",