diff --git a/CleanSpec.mk b/CleanSpec.mk
index f04a390..00d0aa5 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -63,3 +63,4 @@
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/lib/android.hardware.tests*)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/lib/vndk/android.hardware.tests*)
 $(call add-clean-step, rm -rf $(PRODUCT_OUT)/system/lib/vndk-sp/android.hardware.graphics.allocator*)
+$(call add-clean-step, find $(PRODUCT_OUT)/system $(PRODUCT_OUT)/vendor -type f -name "android\.hardware\.configstore\@1\.1*" -print0 | xargs -0 rm -f)
diff --git a/compatibility_matrix.current.xml b/compatibility_matrix.current.xml
index 5b033e7..9287d67 100644
--- a/compatibility_matrix.current.xml
+++ b/compatibility_matrix.current.xml
@@ -81,7 +81,7 @@
     </hal>
     <hal format="hidl" optional="false">
         <name>android.hardware.configstore</name>
-        <version>1.0-1</version>
+        <version>1.0</version>
         <interface>
             <name>ISurfaceFlingerConfigs</name>
             <instance>default</instance>
diff --git a/configstore/1.1/default/Android.mk b/configstore/1.0/default/Android.mk
similarity index 66%
rename from configstore/1.1/default/Android.mk
rename to configstore/1.0/default/Android.mk
index 53e454b..20f4c5b 100644
--- a/configstore/1.1/default/Android.mk
+++ b/configstore/1.0/default/Android.mk
@@ -2,12 +2,12 @@
 
 ################################################################################
 include $(CLEAR_VARS)
-LOCAL_MODULE := android.hardware.configstore@1.1-service
-LOCAL_REQUIRED_MODULES_arm64 := configstore@1.1.policy
+LOCAL_MODULE := android.hardware.configstore@1.0-service
+LOCAL_REQUIRED_MODULES_arm64 := configstore@1.0.policy
 LOCAL_PROPRIETARY_MODULE := true
 LOCAL_MODULE_CLASS := EXECUTABLES
 LOCAL_MODULE_RELATIVE_PATH := hw
-LOCAL_INIT_RC := android.hardware.configstore@1.1-service.rc
+LOCAL_INIT_RC := android.hardware.configstore@1.0-service.rc
 LOCAL_SRC_FILES:= service.cpp
 
 include $(LOCAL_PATH)/surfaceflinger.mk
@@ -19,17 +19,16 @@
     libhwminijail \
     liblog \
     libutils \
-    android.hardware.configstore@1.0 \
-    android.hardware.configstore@1.1
+    android.hardware.configstore@1.0
 
 include $(BUILD_EXECUTABLE)
 
 # seccomp filter for configstore
 ifeq ($(TARGET_ARCH), $(filter $(TARGET_ARCH), arm64))
 include $(CLEAR_VARS)
-LOCAL_MODULE := configstore@1.1.policy
+LOCAL_MODULE := configstore@1.0.policy
 LOCAL_MODULE_CLASS := ETC
 LOCAL_MODULE_PATH := $(TARGET_OUT_VENDOR)/etc/seccomp_policy
-LOCAL_SRC_FILES := seccomp_policy/configstore@1.1-$(TARGET_ARCH).policy
+LOCAL_SRC_FILES := seccomp_policy/configstore@1.0-$(TARGET_ARCH).policy
 include $(BUILD_PREBUILT)
 endif
diff --git a/configstore/1.1/default/SurfaceFlingerConfigs.cpp b/configstore/1.0/default/SurfaceFlingerConfigs.cpp
similarity index 96%
rename from configstore/1.1/default/SurfaceFlingerConfigs.cpp
rename to configstore/1.0/default/SurfaceFlingerConfigs.cpp
index 5a040f2..3239274 100644
--- a/configstore/1.1/default/SurfaceFlingerConfigs.cpp
+++ b/configstore/1.0/default/SurfaceFlingerConfigs.cpp
@@ -19,7 +19,7 @@
 namespace android {
 namespace hardware {
 namespace configstore {
-namespace V1_1 {
+namespace V1_0 {
 namespace implementation {
 
 // Methods from ::android::hardware::configstore::V1_0::ISurfaceFlingerConfigs
@@ -139,13 +139,10 @@
     return Void();
 }
 
-// Methods from ::android::hardware::configstore::V1_1::ISurfaceFlingerConfigs
-// follow.
-
 // Methods from ::android::hidl::base::V1_0::IBase follow.
 
 }  // namespace implementation
-}  // namespace V1_1
+}  // namespace V1_0
 }  // namespace configstore
 }  // namespace hardware
 }  // namespace android
diff --git a/configstore/1.1/default/SurfaceFlingerConfigs.h b/configstore/1.0/default/SurfaceFlingerConfigs.h
similarity index 77%
rename from configstore/1.1/default/SurfaceFlingerConfigs.h
rename to configstore/1.0/default/SurfaceFlingerConfigs.h
index 53e8ae8..32e5fc3 100644
--- a/configstore/1.1/default/SurfaceFlingerConfigs.h
+++ b/configstore/1.0/default/SurfaceFlingerConfigs.h
@@ -1,17 +1,17 @@
-#ifndef ANDROID_HARDWARE_CONFIGSTORE_V1_1_SURFACEFLINGERCONFIGS_H
-#define ANDROID_HARDWARE_CONFIGSTORE_V1_1_SURFACEFLINGERCONFIGS_H
+#ifndef ANDROID_HARDWARE_CONFIGSTORE_V1_0_SURFACEFLINGERCONFIGS_H
+#define ANDROID_HARDWARE_CONFIGSTORE_V1_0_SURFACEFLINGERCONFIGS_H
 
-#include <android/hardware/configstore/1.1/ISurfaceFlingerConfigs.h>
+#include <android/hardware/configstore/1.0/ISurfaceFlingerConfigs.h>
 #include <hidl/MQDescriptor.h>
 #include <hidl/Status.h>
 
 namespace android {
 namespace hardware {
 namespace configstore {
-namespace V1_1 {
+namespace V1_0 {
 namespace implementation {
 
-using ::android::hardware::configstore::V1_1::ISurfaceFlingerConfigs;
+using ::android::hardware::configstore::V1_0::ISurfaceFlingerConfigs;
 using ::android::hardware::Return;
 using ::android::hardware::Void;
 using ::android::sp;
@@ -32,16 +32,13 @@
     Return<void> maxFrameBufferAcquiredBuffers(maxFrameBufferAcquiredBuffers_cb _hidl_cb) override;
     Return<void> startGraphicsAllocatorService(startGraphicsAllocatorService_cb _hidl_cb) override;
 
-    // Methods from
-    // ::android::hardware::configstore::V1_1::ISurfaceFlingerConfigs follow.
-
     // Methods from ::android::hidl::base::V1_0::IBase follow.
 };
 
 }  // namespace implementation
-}  // namespace V1_1
+}  // namespace V1_0
 }  // namespace configstore
 }  // namespace hardware
 }  // namespace android
 
-#endif  // ANDROID_HARDWARE_CONFIGSTORE_V1_1_SURFACEFLINGERCONFIGS_H
+#endif  // ANDROID_HARDWARE_CONFIGSTORE_V1_0_SURFACEFLINGERCONFIGS_H
diff --git a/configstore/1.0/default/android.hardware.configstore@1.0-service.rc b/configstore/1.0/default/android.hardware.configstore@1.0-service.rc
new file mode 100644
index 0000000..40fb498
--- /dev/null
+++ b/configstore/1.0/default/android.hardware.configstore@1.0-service.rc
@@ -0,0 +1,4 @@
+service vendor.configstore-hal-1-0 /vendor/bin/hw/android.hardware.configstore@1.0-service
+    class hal animation
+    user system
+    group system
diff --git a/configstore/1.1/default/seccomp_policy/configstore@1.1-arm64.policy b/configstore/1.0/default/seccomp_policy/configstore@1.0-arm64.policy
similarity index 100%
rename from configstore/1.1/default/seccomp_policy/configstore@1.1-arm64.policy
rename to configstore/1.0/default/seccomp_policy/configstore@1.0-arm64.policy
diff --git a/configstore/1.1/default/service.cpp b/configstore/1.0/default/service.cpp
similarity index 80%
rename from configstore/1.1/default/service.cpp
rename to configstore/1.0/default/service.cpp
index 535e0cd..c9c81a0 100644
--- a/configstore/1.1/default/service.cpp
+++ b/configstore/1.0/default/service.cpp
@@ -14,9 +14,9 @@
  * limitations under the License.
  */
 
-#define LOG_TAG "android.hardware.configstore@1.1-service"
+#define LOG_TAG "android.hardware.configstore@1.0-service"
 
-#include <android/hardware/configstore/1.1/ISurfaceFlingerConfigs.h>
+#include <android/hardware/configstore/1.0/ISurfaceFlingerConfigs.h>
 #include <hidl/HidlTransportSupport.h>
 #include <hwminijail/HardwareMinijail.h>
 
@@ -24,8 +24,8 @@
 
 using android::hardware::configureRpcThreadpool;
 using android::hardware::joinRpcThreadpool;
-using android::hardware::configstore::V1_1::ISurfaceFlingerConfigs;
-using android::hardware::configstore::V1_1::implementation::SurfaceFlingerConfigs;
+using android::hardware::configstore::V1_0::ISurfaceFlingerConfigs;
+using android::hardware::configstore::V1_0::implementation::SurfaceFlingerConfigs;
 using android::hardware::SetupMinijail;
 using android::sp;
 using android::status_t;
@@ -34,7 +34,7 @@
 int main() {
     configureRpcThreadpool(10, true);
 
-    SetupMinijail("/vendor/etc/seccomp_policy/configstore@1.1.policy");
+    SetupMinijail("/vendor/etc/seccomp_policy/configstore@1.0.policy");
 
     sp<ISurfaceFlingerConfigs> surfaceFlingerConfigs = new SurfaceFlingerConfigs;
     status_t status = surfaceFlingerConfigs->registerAsService();
diff --git a/configstore/1.1/default/surfaceflinger.mk b/configstore/1.0/default/surfaceflinger.mk
similarity index 100%
rename from configstore/1.1/default/surfaceflinger.mk
rename to configstore/1.0/default/surfaceflinger.mk
diff --git a/configstore/1.1/Android.bp b/configstore/1.1/Android.bp
deleted file mode 100644
index f0a1748..0000000
--- a/configstore/1.1/Android.bp
+++ /dev/null
@@ -1,18 +0,0 @@
-// This file is autogenerated by hidl-gen -Landroidbp.
-
-hidl_interface {
-    name: "android.hardware.configstore@1.1",
-    root: "android.hardware",
-    vndk: {
-        enabled: true,
-    },
-    srcs: [
-        "ISurfaceFlingerConfigs.hal",
-    ],
-    interfaces: [
-        "android.hardware.configstore@1.0",
-        "android.hidl.base@1.0",
-    ],
-    gen_java: true,
-}
-
diff --git a/configstore/1.1/ISurfaceFlingerConfigs.hal b/configstore/1.1/ISurfaceFlingerConfigs.hal
deleted file mode 100644
index 5eacbe0..0000000
--- a/configstore/1.1/ISurfaceFlingerConfigs.hal
+++ /dev/null
@@ -1,25 +0,0 @@
-/*
- * Copyright (C) 2017 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.1 (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-2.1
- *
- * 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.
- */
-package android.hardware.configstore@1.1;
-
-import @1.0::ISurfaceFlingerConfigs;
-
-/**
- * New revision of ISurfaceFlingerConfigs
- */
-
-interface ISurfaceFlingerConfigs extends @1.0::ISurfaceFlingerConfigs {
-};
diff --git a/configstore/1.1/default/android.hardware.configstore@1.1-service.rc b/configstore/1.1/default/android.hardware.configstore@1.1-service.rc
deleted file mode 100644
index 105678a..0000000
--- a/configstore/1.1/default/android.hardware.configstore@1.1-service.rc
+++ /dev/null
@@ -1,4 +0,0 @@
-service vendor.configstore-hal /vendor/bin/hw/android.hardware.configstore@1.1-service
-    class hal animation
-    user system
-    group system
diff --git a/configstore/1.1/vts/functional/Android.bp b/configstore/1.1/vts/functional/Android.bp
deleted file mode 100644
index 59beb09..0000000
--- a/configstore/1.1/vts/functional/Android.bp
+++ /dev/null
@@ -1,26 +0,0 @@
-//
-// Copyright (C) 2017 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.
-//
-
-cc_test {
-    name: "VtsHalConfigstoreV1_1TargetTest",
-    defaults: ["VtsHalTargetTestDefaults"],
-    srcs: ["VtsHalConfigstoreV1_1TargetTest.cpp"],
-    static_libs: [
-        "android.hardware.configstore@1.0",
-        "android.hardware.configstore@1.1",
-    ],
-}
-
diff --git a/configstore/1.1/vts/functional/VtsHalConfigstoreV1_1TargetTest.cpp b/configstore/1.1/vts/functional/VtsHalConfigstoreV1_1TargetTest.cpp
deleted file mode 100644
index bd3da4c..0000000
--- a/configstore/1.1/vts/functional/VtsHalConfigstoreV1_1TargetTest.cpp
+++ /dev/null
@@ -1,55 +0,0 @@
-/*
- * Copyright (C) 2017 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.
- */
-
-#define LOG_TAG "ConfigstoreHidlHalTest"
-
-#include <VtsHalHidlTargetTestBase.h>
-#include <android-base/logging.h>
-#include <android/hardware/configstore/1.0/types.h>
-#include <android/hardware/configstore/1.1/ISurfaceFlingerConfigs.h>
-#include <unistd.h>
-
-using ::android::hardware::configstore::V1_1::ISurfaceFlingerConfigs;
-using ::android::sp;
-
-#define ASSERT_OK(ret) ASSERT_TRUE(ret.isOk())
-#define EXPECT_OK(ret) EXPECT_TRUE(ret.isOk())
-
-class ConfigstoreHidlTest : public ::testing::VtsHalHidlTargetTestBase {
-   public:
-    sp<ISurfaceFlingerConfigs> sfConfigs;
-
-    virtual void SetUp() override {
-        sfConfigs = ::testing::VtsHalHidlTargetTestBase::getService<ISurfaceFlingerConfigs>();
-        ASSERT_NE(sfConfigs, nullptr);
-    }
-
-    virtual void TearDown() override {}
-};
-
-/**
- * Placeholder testcase.
- */
-TEST_F(ConfigstoreHidlTest, Test) {
-    ASSERT_TRUE(true);
-}
-
-int main(int argc, char** argv) {
-    ::testing::InitGoogleTest(&argc, argv);
-    int status = RUN_ALL_TESTS();
-    LOG(INFO) << "Test result = " << status;
-    return status;
-}
diff --git a/light/2.0/default/android.hardware.light@2.0-service.rc b/light/2.0/default/android.hardware.light@2.0-service.rc
index f268706..68f74c4 100644
--- a/light/2.0/default/android.hardware.light@2.0-service.rc
+++ b/light/2.0/default/android.hardware.light@2.0-service.rc
@@ -1,4 +1,5 @@
 service vendor.light-hal-2-0 /vendor/bin/hw/android.hardware.light@2.0-service
+    interface android.hardware.light@2.0::ILight default
     class hal
     user system
     group system
diff --git a/tests/baz/1.0/IBaz.hal b/tests/baz/1.0/IBaz.hal
index 8c6a9a4..9a9e754 100644
--- a/tests/baz/1.0/IBaz.hal
+++ b/tests/baz/1.0/IBaz.hal
@@ -68,6 +68,10 @@
         bitfield<BitField> bf;
     };
 
+    struct StructWithInterface {
+        int32_t number;
+        IBase dummy;
+    };
     oneway doThis(float param);
 
     doThatAndReturnSomething(int64_t param) generates (int32_t result);
@@ -93,4 +97,6 @@
     size(uint32_t size) generates (uint32_t size);
 
     getNestedStructs() generates(vec<NestedStruct> data);
+
+    haveSomeStructWithInterface(StructWithInterface swi) generates(StructWithInterface swi);
 };
diff --git a/tests/baz/1.0/default/Baz.cpp b/tests/baz/1.0/default/Baz.cpp
index 5ccd87b..e118122 100644
--- a/tests/baz/1.0/default/Baz.cpp
+++ b/tests/baz/1.0/default/Baz.cpp
@@ -394,6 +394,12 @@
     _hidl_cb(result);
     return Void();
 }
+
+Return<void> Baz::haveSomeStructWithInterface(const StructWithInterface& swi,
+                                              haveSomeStructWithInterface_cb _hidl_cb) {
+    _hidl_cb(swi);
+    return Void();
+}
 // Methods from ::android::hidl::base::V1_0::IBase follow.
 
 IBaz* HIDL_FETCH_IBaz(const char* /* name */) {
diff --git a/tests/baz/1.0/default/Baz.h b/tests/baz/1.0/default/Baz.h
index 4443587..c264f47 100644
--- a/tests/baz/1.0/default/Baz.h
+++ b/tests/baz/1.0/default/Baz.h
@@ -91,6 +91,8 @@
     Return<uint32_t> size(uint32_t size) override;
     Return<void> getNestedStructs(getNestedStructs_cb _hidl_cb) override;
 
+    Return<void> haveSomeStructWithInterface(const StructWithInterface& swi,
+                                             haveSomeStructWithInterface_cb _hidl_cb) override;
     // Methods from ::android::hidl::base::V1_0::IBase follow.
  private:
     sp<IBazCallback> mStoredCallback;