diff --git a/audio/effect/4.0/xml/audio_effects_conf_V4_0.xsd b/audio/effect/4.0/xml/audio_effects_conf_V4_0.xsd
new file mode 120000
index 0000000..82d569a
--- /dev/null
+++ b/audio/effect/4.0/xml/audio_effects_conf_V4_0.xsd
@@ -0,0 +1 @@
+../../2.0/xml/audio_effects_conf_V2_0.xsd
\ No newline at end of file
diff --git a/compatibility_matrices/compatibility_matrix.current.xml b/compatibility_matrices/compatibility_matrix.current.xml
index 370ffdd..95fe959 100644
--- a/compatibility_matrices/compatibility_matrix.current.xml
+++ b/compatibility_matrices/compatibility_matrix.current.xml
@@ -76,7 +76,7 @@
         <version>2.4</version>
         <interface>
             <name>ICameraProvider</name>
-            <instance>legacy/0</instance>
+            <regex-instance>[^/]+/[0-9]+</regex-instance>
         </interface>
     </hal>
     <hal format="hidl" optional="true">
@@ -225,8 +225,7 @@
         <version>1.0</version>
         <interface>
             <name>IDevice</name>
-            <!-- TODO(b/73738616): This should be * (match any) -->
-            <instance>hvx</instance>
+            <regex-instance>.*</regex-instance>
         </interface>
     </hal>
     <hal format="hidl" optional="true">
@@ -258,11 +257,11 @@
         <version>1.0-1</version>
         <interface>
             <name>IRadio</name>
-            <instance>slot1</instance>
+            <regex-instance>slot[0-9]+</regex-instance>
         </interface>
         <interface>
             <name>ISap</name>
-            <instance>slot1</instance>
+            <regex-instance>slot[0-9]+</regex-instance>
         </interface>
     </hal>
     <hal format="hidl" optional="true">
diff --git a/current.txt b/current.txt
index 0c50713..dbe462f 100644
--- a/current.txt
+++ b/current.txt
@@ -369,4 +369,6 @@
 ee08280de21cb41e3ec26d6ed636c701b7f70516e71fb22f4fe60a13e603f406 android.hardware.wifi.hostapd@1.0::IHostapd
 b2479cd7a417a1cf4f3a22db4e4579e21bac38fdcaf381e2bf10176d05397e01 android.hardware.wifi.hostapd@1.0::types
 e362203b941f18bd4cba29a62adfa02453ed00d6be5b72cdb6c4d7e0bf394a40 android.hardware.wifi.supplicant@1.1::ISupplicant
+21757d0e5dd4b7e4bd981a4a20531bca3c32271ad9777b17b74eb5a1ea508384 android.hardware.wifi.supplicant@1.1::ISupplicantStaIface
+cd4330c3196bda1d642a32abfe23a7d64ebfbda721940643af6867af3b3f0aa9 android.hardware.wifi.supplicant@1.1::ISupplicantStaIfaceCallback
 10ff2fae516346b86121368ce5790d5accdfcb73983246b813f3d488b66db45a android.hardware.wifi.supplicant@1.1::ISupplicantStaNetwork
diff --git a/drm/1.1/vts/functional/drm_hal_clearkey_test.cpp b/drm/1.1/vts/functional/drm_hal_clearkey_test.cpp
index 061f2cd..1246616 100644
--- a/drm/1.1/vts/functional/drm_hal_clearkey_test.cpp
+++ b/drm/1.1/vts/functional/drm_hal_clearkey_test.cpp
@@ -43,7 +43,6 @@
 using ::android::hardware::drm::V1_0::ICryptoPlugin;
 using ::android::hardware::drm::V1_0::KeyedVector;
 using ::android::hardware::drm::V1_0::KeyValue;
-using ::android::hardware::drm::V1_0::KeyRequestType;
 using ::android::hardware::drm::V1_0::KeyType;
 using ::android::hardware::drm::V1_0::Mode;
 using ::android::hardware::drm::V1_0::Pattern;
@@ -60,6 +59,8 @@
 using ::android::hardware::drm::V1_1::ICryptoFactory;
 using ::android::hardware::drm::V1_1::IDrmFactory;
 using ::android::hardware::drm::V1_1::IDrmPlugin;
+using ::android::hardware::drm::V1_1::KeyRequestType;
+using ::android::hardware::drm::V1_1::SecureStopRelease;
 using ::android::hardware::drm::V1_1::SecurityLevel;
 using ::android::hardware::drm::V1_1::SecurityLevel;
 
@@ -167,7 +168,6 @@
     SessionId openSession(SecurityLevel level);
     void closeSession(const SessionId& sessionId);
     hidl_vec<uint8_t> loadKeys(const SessionId& sessionId, const KeyType& type);
-    sp<IMemory> getDecryptMemory(size_t size, size_t index);
 
   private:
     sp<IDrmPlugin> createDrmPlugin(sp<IDrmFactory> drmFactory) {
@@ -308,6 +308,125 @@
 }
 
 /**
+ * Helper method to load keys for subsequent decrypt tests.
+ * These tests use predetermined key request/response to
+ * avoid requiring a round trip to a license server.
+ */
+hidl_vec<uint8_t> DrmHalClearkeyTest::loadKeys(
+    const SessionId& sessionId, const KeyType& type = KeyType::STREAMING) {
+    hidl_vec<uint8_t> initData = {
+        // BMFF box header (4 bytes size + 'pssh')
+        0x00, 0x00, 0x00, 0x34, 0x70, 0x73, 0x73, 0x68,
+        // full box header (version = 1 flags = 0)
+        0x01, 0x00, 0x00, 0x00,
+        // system id
+        0x10, 0x77, 0xef, 0xec, 0xc0, 0xb2, 0x4d, 0x02, 0xac, 0xe3, 0x3c,
+        0x1e, 0x52, 0xe2, 0xfb, 0x4b,
+        // number of key ids
+        0x00, 0x00, 0x00, 0x01,
+        // key id
+        0x60, 0x06, 0x1e, 0x01, 0x7e, 0x47, 0x7e, 0x87, 0x7e, 0x57, 0xd0,
+        0x0d, 0x1e, 0xd0, 0x0d, 0x1e,
+        // size of data, must be zero
+        0x00, 0x00, 0x00, 0x00};
+
+    hidl_vec<uint8_t> expectedKeyRequest = {
+        0x7b, 0x22, 0x6b, 0x69, 0x64, 0x73, 0x22, 0x3a, 0x5b, 0x22, 0x59, 0x41, 0x59, 0x65,
+        0x41, 0x58, 0x35, 0x48, 0x66, 0x6f, 0x64, 0x2d, 0x56, 0x39, 0x41, 0x4e, 0x48, 0x74,
+        0x41, 0x4e, 0x48, 0x67, 0x22, 0x5d, 0x2c, 0x22, 0x74, 0x79, 0x70, 0x65, 0x22, 0x3a,
+        0x22, 0x74, 0x65, 0x6d, 0x70, 0x6f, 0x72, 0x61, 0x72, 0x79, 0x22, 0x7d};
+
+    hidl_vec<uint8_t> knownKeyResponse = {
+        0x7b, 0x22, 0x6b, 0x65, 0x79, 0x73, 0x22, 0x3a, 0x5b, 0x7b, 0x22, 0x6b, 0x74, 0x79, 0x22,
+        0x3a, 0x22, 0x6f, 0x63, 0x74, 0x22, 0x2c, 0x22, 0x6b, 0x69, 0x64, 0x22, 0x3a, 0x22, 0x59,
+        0x41, 0x59, 0x65, 0x41, 0x58, 0x35, 0x48, 0x66, 0x6f, 0x64, 0x2d, 0x56, 0x39, 0x41, 0x4e,
+        0x48, 0x74, 0x41, 0x4e, 0x48, 0x67, 0x22, 0x2c, 0x22, 0x6b, 0x22, 0x3a, 0x22, 0x47, 0x6f,
+        0x6f, 0x67, 0x6c, 0x65, 0x54, 0x65, 0x73, 0x74, 0x4b, 0x65, 0x79, 0x42, 0x61, 0x73, 0x65,
+        0x36, 0x34, 0x67, 0x67, 0x67, 0x22, 0x7d, 0x5d, 0x7d, 0x0a};
+
+    hidl_string mimeType = "video/mp4";
+    KeyedVector optionalParameters;
+    auto res = drmPlugin->getKeyRequest_1_1(
+        sessionId, initData, mimeType, type, optionalParameters,
+        [&](Status status, const hidl_vec<uint8_t>& request,
+            KeyRequestType requestType, const hidl_string&) {
+            EXPECT_EQ(Status::OK, status);
+            EXPECT_EQ(KeyRequestType::INITIAL, requestType);
+            EXPECT_EQ(request, expectedKeyRequest);
+        });
+    EXPECT_OK(res);
+
+    hidl_vec<uint8_t> keySetId;
+    res = drmPlugin->provideKeyResponse(
+        sessionId, knownKeyResponse,
+        [&](Status status, const hidl_vec<uint8_t>& myKeySetId) {
+            EXPECT_EQ(Status::OK, status);
+            EXPECT_EQ(0u, myKeySetId.size());
+            keySetId = myKeySetId;
+        });
+    EXPECT_OK(res);
+    return keySetId;
+}
+
+/**
+ * Test openSession negative case: security level higher than supported
+ */
+TEST_F(DrmHalClearkeyTest, OpenSessionBadLevel) {
+    auto res = drmPlugin->openSession_1_1(SecurityLevel::HW_SECURE_ALL,
+            [&](Status status, const SessionId& /* id */) {
+                EXPECT_EQ(Status::ERROR_DRM_CANNOT_HANDLE, status);
+            });
+    EXPECT_OK(res);
+}
+
+/**
+ * Test getKeyRequest_1_1 via loadKeys
+ */
+TEST_F(DrmHalClearkeyTest, GetKeyRequest) {
+    auto sessionId = openSession();
+    loadKeys(sessionId);
+    closeSession(sessionId);
+}
+
+/**
+ * A get key request should fail if no sessionId is provided
+ */
+TEST_F(DrmHalClearkeyTest, GetKeyRequestNoSession) {
+    SessionId invalidSessionId;
+    hidl_vec<uint8_t> initData;
+    hidl_string mimeType = "video/mp4";
+    KeyedVector optionalParameters;
+    auto res = drmPlugin->getKeyRequest_1_1(
+            invalidSessionId, initData, mimeType, KeyType::STREAMING,
+            optionalParameters,
+            [&](Status status, const hidl_vec<uint8_t>&, KeyRequestType,
+                const hidl_string&) { EXPECT_EQ(Status::BAD_VALUE, status); });
+    EXPECT_OK(res);
+}
+
+/**
+ * The clearkey plugin doesn't support offline key requests.
+ * Test that the plugin returns the expected error code in
+ * this case.
+ */
+TEST_F(DrmHalClearkeyTest, GetKeyRequestOfflineKeyTypeNotSupported) {
+    auto sessionId = openSession();
+    hidl_vec<uint8_t> initData;
+    hidl_string mimeType = "video/mp4";
+    KeyedVector optionalParameters;
+
+    auto res = drmPlugin->getKeyRequest_1_1(
+            sessionId, initData, mimeType, KeyType::OFFLINE, optionalParameters,
+            [&](Status status, const hidl_vec<uint8_t>&, KeyRequestType,
+                const hidl_string&) {
+                // Clearkey plugin doesn't support offline key type
+                EXPECT_EQ(Status::ERROR_DRM_CANNOT_HANDLE, status);
+            });
+    EXPECT_OK(res);
+    closeSession(sessionId);
+}
+
+/**
  * Test that the plugin returns valid connected and max HDCP levels
  */
 TEST_F(DrmHalClearkeyTest, GetHdcpLevels) {
@@ -322,6 +441,11 @@
 }
 
 /**
+ * Since getHdcpLevels only queries information there are no
+ * negative cases.
+ */
+
+/**
  * Test that the plugin returns default open and max session counts
  */
 TEST_F(DrmHalClearkeyTest, GetDefaultSessionCounts) {
@@ -373,6 +497,11 @@
 }
 
 /**
+ * Since getNumberOfSessions only queries information there are no
+ * negative cases.
+ */
+
+/**
  * Test that the plugin returns the same security level
  * by default as when it is requested explicitly
  */
@@ -428,7 +557,7 @@
 /**
  * Test metrics are set appropriately for open and close operations.
  */
-TEST_F(DrmHalClearkeyTest, GetMetricsSuccess) {
+TEST_F(DrmHalClearkeyTest, GetMetricsOpenClose) {
     SessionId sessionId = openSession();
     // The first close should be successful.
     closeSession(sessionId);
@@ -449,8 +578,292 @@
                                                     (int64_t)Status::ERROR_DRM_SESSION_NOT_OPENED,
                                                     "count", (int64_t)1));
     });
+    EXPECT_OK(res);
 }
 
+/**
+ * Since getMetrics only queries information there are no
+ * negative cases.
+ */
+
+/**
+ * Test that there are no secure stop ids after clearing them
+ */
+TEST_F(DrmHalClearkeyTest, GetSecureStopIdsCleared) {
+    auto stat = drmPlugin->removeAllSecureStops();
+    EXPECT_OK(stat);
+
+    bool ok = drmPlugin->getSecureStopIds(
+            [&](Status status, const hidl_vec<SecureStopId>& ids) {
+                EXPECT_EQ(Status::OK, status);
+                EXPECT_EQ(0u, ids.size());
+            }).isOk();
+    EXPECT_TRUE(ok);
+}
+
+/**
+ * Test that there are secure stop ids after loading keys once
+ */
+TEST_F(DrmHalClearkeyTest, GetSecureStopIdsOnce) {
+    auto stat = drmPlugin->removeAllSecureStops();
+    EXPECT_OK(stat);
+
+    auto sessionId = openSession();
+    loadKeys(sessionId);
+    closeSession(sessionId);
+
+    auto res = drmPlugin->getSecureStopIds(
+            [&](Status status, const hidl_vec<SecureStopId>& ids) {
+                EXPECT_EQ(Status::OK, status);
+                EXPECT_EQ(1u, ids.size());
+            });
+    EXPECT_OK(res);
+
+    stat = drmPlugin->removeAllSecureStops();
+    EXPECT_OK(stat);
+
+    res = drmPlugin->getSecureStopIds(
+            [&](Status status, const hidl_vec<SecureStopId>& ids) {
+                EXPECT_EQ(Status::OK, status);
+                EXPECT_EQ(0u, ids.size());
+            });
+    EXPECT_OK(res);
+}
+
+/**
+ * Since getSecureStopIds only queries information there are no
+ * negative cases.
+ */
+
+/**
+ * Test that the clearkey plugin reports no secure stops when
+ * there are none.
+ */
+TEST_F(DrmHalClearkeyTest, GetNoSecureStops) {
+    auto stat = drmPlugin->removeAllSecureStops();
+    EXPECT_OK(stat);
+
+    auto res = drmPlugin->getSecureStops(
+            [&](Status status, const hidl_vec<SecureStop>& stops) {
+                EXPECT_EQ(Status::OK, status);
+                EXPECT_EQ(0u, stops.size());
+            });
+    EXPECT_OK(res);
+}
+
+/**
+ * Test get/remove of one secure stop
+ */
+TEST_F(DrmHalClearkeyTest, GetOneSecureStopAndRemoveIt) {
+    auto stat = drmPlugin->removeAllSecureStops();
+    EXPECT_OK(stat);
+
+    auto sessionId = openSession();
+    loadKeys(sessionId);
+    closeSession(sessionId);
+
+    auto res = drmPlugin->getSecureStops(
+            [&](Status status, const hidl_vec<SecureStop>& stops) {
+                EXPECT_EQ(Status::OK, status);
+                EXPECT_EQ(1u, stops.size());
+            });
+    EXPECT_OK(res);
+
+    stat = drmPlugin->removeAllSecureStops();
+    EXPECT_OK(stat);
+
+    res = drmPlugin->getSecureStops(
+            [&](Status status, const hidl_vec<SecureStop>& stops) {
+                EXPECT_EQ(Status::OK, status);
+                EXPECT_EQ(0u, stops.size());
+            });
+    EXPECT_OK(res);
+}
+
+/**
+ * Since getSecureStops only queries information there are no
+ * negative cases.
+ */
+
+/**
+ * Test that there are no secure stops after clearing them
+ */
+TEST_F(DrmHalClearkeyTest, GetSecureStopsCleared) {
+    auto stat = drmPlugin->removeAllSecureStops();
+    EXPECT_OK(stat);
+
+    auto res = drmPlugin->getSecureStops(
+            [&](Status status, const hidl_vec<SecureStop>& stops) {
+                EXPECT_EQ(Status::OK, status);
+                EXPECT_EQ(0u, stops.size());
+            });
+    EXPECT_OK(res);
+}
+
+/**
+ * Test that there are secure stops after loading keys once
+ */
+TEST_F(DrmHalClearkeyTest, GetSecureStopsOnce) {
+    auto stat = drmPlugin->removeAllSecureStops();
+    EXPECT_OK(stat);
+
+    auto sessionId = openSession();
+    loadKeys(sessionId);
+    closeSession(sessionId);
+
+    auto res = drmPlugin->getSecureStops(
+            [&](Status status, const hidl_vec<SecureStop>& stops) {
+                EXPECT_EQ(Status::OK, status);
+                EXPECT_EQ(1u, stops.size());
+            });
+    EXPECT_OK(res);
+
+    stat = drmPlugin->removeAllSecureStops();
+    EXPECT_OK(stat);
+
+    res = drmPlugin->getSecureStops(
+            [&](Status status, const hidl_vec<SecureStop>& stops) {
+                EXPECT_EQ(Status::OK, status);
+                EXPECT_EQ(0u, stops.size());
+            });
+    EXPECT_OK(res);
+}
+
+/**
+ * Since getSecureStops only queries information there are no
+ * negative cases.
+ */
+
+/**
+ * Test that releasing a secure stop with empty
+ * release message fails with the documented error
+ */
+TEST_F(DrmHalClearkeyTest, ReleaseEmptySecureStop) {
+    SecureStopRelease emptyRelease = {.opaqueData = hidl_vec<uint8_t>()};
+    Status status = drmPlugin->releaseSecureStops(emptyRelease);
+    EXPECT_EQ(Status::BAD_VALUE, status);
+}
+
+/**
+ * Helper function to create a secure release message for
+ * a secure stop. The clearkey secure stop release format
+ * is just a count followed by the secure stop opaque data.
+ */
+SecureStopRelease makeSecureRelease(const SecureStop &stop) {
+    std::vector<uint8_t> stopData = stop.opaqueData;
+    std::vector<uint8_t> buffer;
+    std::string count = "0001";
+
+    auto it = buffer.insert(buffer.begin(), count.begin(), count.end());
+    buffer.insert(it + count.size(), stopData.begin(), stopData.end());
+    SecureStopRelease release = { .opaqueData = hidl_vec<uint8_t>(buffer) };
+    return release;
+}
+
+/**
+ * Test that releasing one secure stop works
+ */
+TEST_F(DrmHalClearkeyTest, ReleaseOneSecureStop) {
+
+    auto stat = drmPlugin->removeAllSecureStops();
+    EXPECT_OK(stat);
+
+    auto sessionId = openSession();
+    loadKeys(sessionId);
+    closeSession(sessionId);
+
+    SecureStopRelease release;
+    auto res = drmPlugin->getSecureStops(
+            [&](Status status, const hidl_vec<SecureStop>& stops) {
+                EXPECT_EQ(Status::OK, status);
+                EXPECT_EQ(1u, stops.size());
+                release = makeSecureRelease(stops[0]);
+            });
+    EXPECT_OK(res);
+
+    stat = drmPlugin->releaseSecureStops(release);
+    EXPECT_OK(stat);
+
+    res = drmPlugin->getSecureStops(
+            [&](Status status, const hidl_vec<SecureStop>& stops) {
+                EXPECT_EQ(Status::OK, status);
+                EXPECT_EQ(0u, stops.size());
+            });
+    EXPECT_OK(res);
+}
+
+
+/**
+ * Test that removing a secure stop with an empty ID returns
+ * documented error
+ */
+TEST_F(DrmHalClearkeyTest, RemoveEmptySecureStopId) {
+    hidl_vec<uint8_t> emptyId;
+    auto stat = drmPlugin->removeSecureStop(emptyId);
+    EXPECT_OK(stat);
+    EXPECT_EQ(Status::BAD_VALUE, stat);
+}
+
+/**
+ * Test that removing a secure stop after it has already
+ * been removed fails with the documented error code.
+ */
+TEST_F(DrmHalClearkeyTest, RemoveRemovedSecureStopId) {
+    auto stat = drmPlugin->removeAllSecureStops();
+    EXPECT_OK(stat);
+
+    auto sessionId = openSession();
+    loadKeys(sessionId);
+    closeSession(sessionId);
+    SecureStopId ssid;
+
+    auto res = drmPlugin->getSecureStopIds(
+            [&](Status status, const hidl_vec<SecureStopId>& ids) {
+                EXPECT_EQ(Status::OK, status);
+                EXPECT_EQ(1u, ids.size());
+                ssid = ids[0];
+            });
+    EXPECT_OK(res);
+
+    stat = drmPlugin->removeAllSecureStops();
+    EXPECT_OK(stat);
+
+    Status status = drmPlugin->removeSecureStop(ssid);
+    EXPECT_EQ(Status::BAD_VALUE, status);
+}
+
+/**
+ * Test that removing a secure stop by id works
+ */
+TEST_F(DrmHalClearkeyTest, RemoveSecureStopById) {
+    auto stat = drmPlugin->removeAllSecureStops();
+    EXPECT_OK(stat);
+
+    auto sessionId = openSession();
+    loadKeys(sessionId);
+    closeSession(sessionId);
+    SecureStopId ssid;
+
+    auto res = drmPlugin->getSecureStopIds(
+            [&](Status status, const hidl_vec<SecureStopId>& ids) {
+                EXPECT_EQ(Status::OK, status);
+                EXPECT_EQ(1u, ids.size());
+                ssid = ids[0];
+            });
+    EXPECT_OK(res);
+
+    stat = drmPlugin->removeSecureStop(ssid);
+    EXPECT_OK(stat);
+
+    res = drmPlugin->getSecureStopIds(
+            [&](Status status, const hidl_vec<SecureStopId>& ids) {
+                EXPECT_EQ(Status::OK, status);
+                EXPECT_EQ(0u, ids.size());
+            });
+    EXPECT_OK(res);
+}
+
+
 int main(int argc, char** argv) {
     ::testing::AddGlobalTestEnvironment(DrmHidlEnvironment::Instance());
     ::testing::InitGoogleTest(&argc, argv);
diff --git a/wifi/supplicant/1.1/Android.bp b/wifi/supplicant/1.1/Android.bp
index fafd6ad..832d1ad 100644
--- a/wifi/supplicant/1.1/Android.bp
+++ b/wifi/supplicant/1.1/Android.bp
@@ -8,6 +8,8 @@
     },
     srcs: [
         "ISupplicant.hal",
+        "ISupplicantStaIface.hal",
+        "ISupplicantStaIfaceCallback.hal",
         "ISupplicantStaNetwork.hal",
     ],
     interfaces: [
diff --git a/wifi/supplicant/1.1/ISupplicantStaIface.hal b/wifi/supplicant/1.1/ISupplicantStaIface.hal
new file mode 100644
index 0000000..025cc6a
--- /dev/null
+++ b/wifi/supplicant/1.1/ISupplicantStaIface.hal
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2018 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.
+ */
+
+package android.hardware.wifi.supplicant@1.1;
+
+import @1.0::ISupplicantStaIface;
+import @1.1::ISupplicantStaIfaceCallback;
+import @1.0::SupplicantStatus;
+
+/**
+ * Interface exposed by the supplicant for each station mode network
+ * interface (e.g wlan0) it controls.
+ */
+interface ISupplicantStaIface extends @1.0::ISupplicantStaIface {
+
+    /**
+     * Register for callbacks from this interface.
+     *
+     * These callbacks are invoked for events that are specific to this interface.
+     * Registration of multiple callback objects is supported. These objects must
+     * be automatically deleted when the corresponding client process is dead or
+     * if this interface is removed.
+     *
+     * @param callback An instance of the |ISupplicantStaIfaceCallback| HIDL
+     *        interface object.
+     * @return status Status of the operation.
+     *         Possible status codes:
+     *         |SupplicantStatusCode.SUCCESS|,
+     *         |SupplicantStatusCode.FAILURE_UNKNOWN|,
+     *         |SupplicantStatusCode.FAILURE_IFACE_INVALID|
+     */
+    registerCallback_1_1(ISupplicantStaIfaceCallback callback)
+        generates (SupplicantStatus status);
+};
+
diff --git a/wifi/supplicant/1.1/ISupplicantStaIfaceCallback.hal b/wifi/supplicant/1.1/ISupplicantStaIfaceCallback.hal
new file mode 100644
index 0000000..8b92ee5
--- /dev/null
+++ b/wifi/supplicant/1.1/ISupplicantStaIfaceCallback.hal
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2018 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.
+ */
+
+package android.hardware.wifi.supplicant@1.1;
+
+import @1.0::ISupplicantStaIfaceCallback;
+
+/**
+ * Callback Interface exposed by the supplicant service
+ * for each station mode interface (ISupplicantStaIface).
+ *
+ * Clients need to host an instance of this HIDL interface object and
+ * pass a reference of the object to the supplicant via the
+ * corresponding |ISupplicantStaIface.registerCallback_1_1| method.
+ */
+interface ISupplicantStaIfaceCallback extends @1.0::ISupplicantStaIfaceCallback {
+
+    /* EapErrorCode: Error code for EAP or EAP Method as per RFC-4186 */
+    enum EapErrorCode : uint32_t {
+        SIM_GENERAL_FAILURE_AFTER_AUTH = 0,
+        SIM_TEMPORARILY_DENIED = 1026,
+        SIM_NOT_SUBSCRIBED = 1031,
+        SIM_GENERAL_FAILURE_BEFORE_AUTH = 16384,
+        SIM_VENDOR_SPECIFIC_EXPIRED_CERT = 16385,
+    };
+
+    /**
+     * Used to indicate an EAP authentication failure.
+     */
+    oneway onEapFailure_1_1(EapErrorCode errorCode);
+};
+
diff --git a/wifi/supplicant/1.1/vts/functional/Android.bp b/wifi/supplicant/1.1/vts/functional/Android.bp
index 3efe15d..3e65453 100644
--- a/wifi/supplicant/1.1/vts/functional/Android.bp
+++ b/wifi/supplicant/1.1/vts/functional/Android.bp
@@ -40,6 +40,7 @@
     srcs: [
         "VtsHalWifiSupplicantV1_1TargetTest.cpp",
         "supplicant_hidl_test.cpp",
+        "supplicant_sta_iface_hidl_test.cpp",
         "supplicant_sta_network_hidl_test.cpp",
     ],
     static_libs: [
diff --git a/wifi/supplicant/1.1/vts/functional/supplicant_hidl_test_utils_1_1.cpp b/wifi/supplicant/1.1/vts/functional/supplicant_hidl_test_utils_1_1.cpp
index 3f17740..04a5ed9 100644
--- a/wifi/supplicant/1.1/vts/functional/supplicant_hidl_test_utils_1_1.cpp
+++ b/wifi/supplicant/1.1/vts/functional/supplicant_hidl_test_utils_1_1.cpp
@@ -21,6 +21,7 @@
 #include "supplicant_hidl_test_utils_1_1.h"
 
 using ::android::hardware::wifi::supplicant::V1_1::ISupplicant;
+using ::android::hardware::wifi::supplicant::V1_1::ISupplicantStaIface;
 using ::android::hardware::wifi::supplicant::V1_1::ISupplicantStaNetwork;
 using ::android::sp;
 
@@ -28,6 +29,10 @@
     return ISupplicant::castFrom(getSupplicant());
 }
 
+sp<ISupplicantStaIface> getSupplicantStaIface_1_1() {
+    return ISupplicantStaIface::castFrom(getSupplicantStaIface());
+}
+
 sp<ISupplicantStaNetwork> createSupplicantStaNetwork_1_1() {
     return ISupplicantStaNetwork::castFrom(createSupplicantStaNetwork());
 }
diff --git a/wifi/supplicant/1.1/vts/functional/supplicant_hidl_test_utils_1_1.h b/wifi/supplicant/1.1/vts/functional/supplicant_hidl_test_utils_1_1.h
index e7ce54a..1c13325 100644
--- a/wifi/supplicant/1.1/vts/functional/supplicant_hidl_test_utils_1_1.h
+++ b/wifi/supplicant/1.1/vts/functional/supplicant_hidl_test_utils_1_1.h
@@ -18,11 +18,15 @@
 #define SUPPLICANT_HIDL_TEST_UTILS_1_1_H
 
 #include <android/hardware/wifi/supplicant/1.1/ISupplicant.h>
+#include <android/hardware/wifi/supplicant/1.1/ISupplicantStaIface.h>
 #include <android/hardware/wifi/supplicant/1.1/ISupplicantStaNetwork.h>
 
 android::sp<android::hardware::wifi::supplicant::V1_1::ISupplicant>
     getSupplicant_1_1();
 
+android::sp<android::hardware::wifi::supplicant::V1_1::ISupplicantStaIface>
+    getSupplicantStaIface_1_1();
+
 android::sp<android::hardware::wifi::supplicant::V1_1::ISupplicantStaNetwork>
     createSupplicantStaNetwork_1_1();
 
diff --git a/wifi/supplicant/1.1/vts/functional/supplicant_sta_iface_hidl_test.cpp b/wifi/supplicant/1.1/vts/functional/supplicant_sta_iface_hidl_test.cpp
new file mode 100644
index 0000000..c5e6319
--- /dev/null
+++ b/wifi/supplicant/1.1/vts/functional/supplicant_sta_iface_hidl_test.cpp
@@ -0,0 +1,139 @@
+/*
+ * Copyright (C) 2018 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.
+ */
+
+#include <android-base/logging.h>
+
+#include <VtsHalHidlTargetTestBase.h>
+
+#include <android/hardware/wifi/supplicant/1.1/ISupplicantStaIface.h>
+
+#include "supplicant_hidl_test_utils.h"
+#include "supplicant_hidl_test_utils_1_1.h"
+
+using ::android::sp;
+using ::android::hardware::hidl_array;
+using ::android::hardware::hidl_string;
+using ::android::hardware::hidl_vec;
+using ::android::hardware::Return;
+using ::android::hardware::Void;
+using ::android::hardware::wifi::supplicant::V1_1::ISupplicantStaIface;
+using ::android::hardware::wifi::supplicant::V1_1::ISupplicantStaIfaceCallback;
+using ::android::hardware::wifi::supplicant::V1_0::SupplicantStatus;
+using ::android::hardware::wifi::supplicant::V1_0::SupplicantStatusCode;
+
+class SupplicantStaIfaceHidlTest
+    : public ::testing::VtsHalHidlTargetTestBase {
+ public:
+  virtual void SetUp() override {
+      startSupplicantAndWaitForHidlService();
+      EXPECT_TRUE(turnOnExcessiveLogging());
+      sta_iface_ = getSupplicantStaIface_1_1();
+      ASSERT_NE(sta_iface_.get(), nullptr);
+  }
+
+  virtual void TearDown() override { stopSupplicant(); }
+
+ protected:
+  // ISupplicantStaIface object used for all tests in this fixture.
+  sp<ISupplicantStaIface> sta_iface_;
+};
+
+class IfaceCallback : public ISupplicantStaIfaceCallback {
+    Return<void> onNetworkAdded(uint32_t /* id */) override { return Void(); }
+    Return<void> onNetworkRemoved(uint32_t /* id */) override { return Void(); }
+    Return<void> onStateChanged(
+        ISupplicantStaIfaceCallback::State /* newState */,
+        const hidl_array<uint8_t, 6>& /*bssid */, uint32_t /* id */,
+        const hidl_vec<uint8_t>& /* ssid */) override {
+        return Void();
+    }
+    Return<void> onAnqpQueryDone(
+        const hidl_array<uint8_t, 6>& /* bssid */,
+        const ISupplicantStaIfaceCallback::AnqpData& /* data */,
+        const ISupplicantStaIfaceCallback::Hs20AnqpData& /* hs20Data */)
+        override {
+        return Void();
+    }
+    virtual Return<void> onHs20IconQueryDone(
+        const hidl_array<uint8_t, 6>& /* bssid */,
+        const hidl_string& /* fileName */,
+        const hidl_vec<uint8_t>& /* data */) override {
+        return Void();
+    }
+    virtual Return<void> onHs20SubscriptionRemediation(
+        const hidl_array<uint8_t, 6>& /* bssid */,
+        ISupplicantStaIfaceCallback::OsuMethod /* osuMethod */,
+        const hidl_string& /* url*/) override {
+        return Void();
+    }
+    Return<void> onHs20DeauthImminentNotice(
+        const hidl_array<uint8_t, 6>& /* bssid */, uint32_t /* reasonCode */,
+        uint32_t /* reAuthDelayInSec */,
+        const hidl_string& /* url */) override {
+        return Void();
+    }
+    Return<void> onDisconnected(const hidl_array<uint8_t, 6>& /* bssid */,
+                                bool /* locallyGenerated */,
+                                ISupplicantStaIfaceCallback::ReasonCode
+                                /* reasonCode */) override {
+        return Void();
+    }
+    Return<void> onAssociationRejected(
+        const hidl_array<uint8_t, 6>& /* bssid */,
+        ISupplicantStaIfaceCallback::StatusCode /* statusCode */,
+        bool /*timedOut */) override {
+        return Void();
+    }
+    Return<void> onAuthenticationTimeout(
+        const hidl_array<uint8_t, 6>& /* bssid */) override {
+        return Void();
+    }
+    Return<void> onBssidChanged(
+        ISupplicantStaIfaceCallback::BssidChangeReason /* reason */,
+        const hidl_array<uint8_t, 6>& /* bssid */) override {
+        return Void();
+    }
+    Return<void> onEapFailure() override { return Void(); }
+    Return<void> onEapFailure_1_1(
+        ISupplicantStaIfaceCallback::EapErrorCode /* eapErrorCode */) override {
+        return Void();
+    }
+    Return<void> onWpsEventSuccess() override { return Void(); }
+    Return<void> onWpsEventFail(
+        const hidl_array<uint8_t, 6>& /* bssid */,
+        ISupplicantStaIfaceCallback::WpsConfigError /* configError */,
+        ISupplicantStaIfaceCallback::WpsErrorIndication /* errorInd */)
+        override {
+        return Void();
+    }
+    Return<void> onWpsEventPbcOverlap() override { return Void(); }
+    Return<void> onExtRadioWorkStart(uint32_t /* id */) override {
+        return Void();
+    }
+    Return<void> onExtRadioWorkTimeout(uint32_t /* id*/) override {
+        return Void();
+    }
+};
+
+/*
+ * RegisterCallback_1_1
+ */
+TEST_F(SupplicantStaIfaceHidlTest, RegisterCallback_1_1) {
+  sta_iface_->registerCallback_1_1(
+      new IfaceCallback(), [](const SupplicantStatus& status) {
+          EXPECT_EQ(SupplicantStatusCode::SUCCESS, status.code);
+      });
+}