diff --git a/automotive/vehicle/aidl/android/hardware/automotive/vehicle/IVehicle.aidl b/automotive/vehicle/aidl/android/hardware/automotive/vehicle/IVehicle.aidl
index 220b1da..cdf9066 100644
--- a/automotive/vehicle/aidl/android/hardware/automotive/vehicle/IVehicle.aidl
+++ b/automotive/vehicle/aidl/android/hardware/automotive/vehicle/IVehicle.aidl
@@ -237,6 +237,8 @@
      * {@link StatusCode#INVALID_ARG}. If a specified propId was not subscribed
      * before, this method must ignore that propId.
      *
+     * Unsubscribe a not-subscribed property ID must do nothing.
+     *
      * If error is returned, some of the properties failed to unsubscribe.
      * Caller is safe to try again, since unsubscribing an already unsubscribed
      * property is okay.
@@ -267,6 +269,9 @@
     /**
      * Gets the supported values lists for [propId, areaId]s.
      *
+     * This is only supported for [propId, areaId]s that have non-null
+     * {@code hasSupportedValueInfo} for their {@code VehicleAreaConfig}.
+     *
      * For a specific [propId, areaId], if the hardware currently specifies
      * a list of supported values for it, then it is returned through the
      * {@code supportedValuesList} field inside
@@ -304,6 +309,9 @@
     /**
      * Gets the min/max supported values for [propId, areaId]s.
      *
+     * This is only supported for [propId, areaId]s that have non-null
+     * {@code hasSupportedValueInfo} for their {@code VehicleAreaConfig}.
+     *
      * For a specific [propId, areaId], if the hardware currently specifies
      * min/max supported value for it, then it is returned through the
      * {@code minSupportedValue} or {@code maxSupportedValue} field inside
@@ -342,6 +350,9 @@
     /**
      * Registers the supported value change callback.
      *
+     * This is only supported for [propId, areaId]s that have non-null
+     * {@code hasSupportedValueInfo} for their {@code VehicleAreaConfig}.
+     *
      * For the specified [propId, areaId]s,
      * {@code callback.onSupportedValueChange} must be invoked if change
      * happens.
@@ -360,6 +371,9 @@
     /**
      * Unregisters the supported value change callback.
      *
+     * This is only supported for [propId, areaId]s that have non-null
+     * {@code hasSupportedValueInfo} for their {@code VehicleAreaConfig}.
+     *
      * @param callback The callback to unregister.
      * @param propIdAreaIds A list of [propId, areaId]s to unregister.
      */
diff --git a/automotive/vehicle/aidl/android/hardware/automotive/vehicle/MinMaxSupportedValueResult.aidl b/automotive/vehicle/aidl/android/hardware/automotive/vehicle/MinMaxSupportedValueResult.aidl
index f85ad3a..a3508ee 100644
--- a/automotive/vehicle/aidl/android/hardware/automotive/vehicle/MinMaxSupportedValueResult.aidl
+++ b/automotive/vehicle/aidl/android/hardware/automotive/vehicle/MinMaxSupportedValueResult.aidl
@@ -43,6 +43,8 @@
      *
      * If the [propId, areaId] does not specify a max supported value, this
      * is {@code null}.
+     *
+     * This must be ignored if status is not {@code StatusCode.OK}.
      */
     @nullable RawPropValues maxSupportedValue;
 }
diff --git a/automotive/vehicle/aidl/android/hardware/automotive/vehicle/SupportedValuesListResult.aidl b/automotive/vehicle/aidl/android/hardware/automotive/vehicle/SupportedValuesListResult.aidl
index 4524f4f..8800b0b 100644
--- a/automotive/vehicle/aidl/android/hardware/automotive/vehicle/SupportedValuesListResult.aidl
+++ b/automotive/vehicle/aidl/android/hardware/automotive/vehicle/SupportedValuesListResult.aidl
@@ -36,6 +36,8 @@
      *
      * If the [propId, areaId] does not specify a supported values list, this
      * is {@code null}.
+     *
+     * This must be ignored if status is not {@code StatusCode.OK}.
      */
     @nullable List<RawPropValues> supportedValuesList;
 }
diff --git a/automotive/vehicle/aidl/android/hardware/automotive/vehicle/VehicleAreaConfig.aidl b/automotive/vehicle/aidl/android/hardware/automotive/vehicle/VehicleAreaConfig.aidl
index 62d7e21..c6b8cd1 100644
--- a/automotive/vehicle/aidl/android/hardware/automotive/vehicle/VehicleAreaConfig.aidl
+++ b/automotive/vehicle/aidl/android/hardware/automotive/vehicle/VehicleAreaConfig.aidl
@@ -230,10 +230,17 @@
     boolean supportVariableUpdateRate;
 
     /**
-     * For VHAL implementation >= V4, this must not be {@code null}. This specifies whether
-     * this property may have min/max supported value or supported values list.
+     * This specifies whether this property may have min/max supported value or supported values
+     * list for [propId, areaId] that supports new supported values APIs.
      *
-     * For VHAL implementation < V4, this is always {@code null} and is not accessed.
+     * If this is not {@code null}. The client may use {@code getMinMaxSupportedValue},
+     * {@code getSupportedValuesLists}, {@code subscribeSupportedValueChange},
+     * {@code unsubscribeSupportedValueChange}.
+     *
+     * If this is {@code null} for legacy properties, the APIs mentioned before are not supported.
+     * Client must fallback to use static supported value information in {@code VehicleAreaConfig}.
+     *
+     * For VHAL implementation < V4, this is always {@code null}.
      */
     @nullable HasSupportedValueInfo hasSupportedValueInfo;
 }
diff --git a/automotive/vehicle/aidl/emu_metadata/android.hardware.automotive.vehicle-types-meta.json b/automotive/vehicle/aidl/emu_metadata/android.hardware.automotive.vehicle-types-meta.json
index 6cd7d1f..b774580 100644
--- a/automotive/vehicle/aidl/emu_metadata/android.hardware.automotive.vehicle-types-meta.json
+++ b/automotive/vehicle/aidl/emu_metadata/android.hardware.automotive.vehicle-types-meta.json
@@ -385,7 +385,7 @@
             {
                 "name": "Fan speed setting",
                 "value": 356517120,
-                "description": "Fan speed setting\nThe maxInt32Value and minInt32Value in VehicleAreaConfig must be defined. All integers between minInt32Value and maxInt32Value must be supported.\nThe minInt32Value indicates the lowest fan speed. The maxInt32Value indicates the highest fan speed.\nThis property is not in any particular unit but in a specified range of relative speeds.\nThis property is defined as VehiclePropertyAccess.READ_WRITE, but OEMs have the option to implement it as VehiclePropertyAccess.READ only."
+                "description": "Fan speed setting\nThe maxInt32Value and minInt32Value in VehicleAreaConfig must be defined. All integers between minInt32Value and maxInt32Value must be supported.\nThe minInt32Value indicates the lowest fan speed. The maxInt32Value indicates the highest fan speed.\nIf {@code HasSupportedValueInfo} for a specific area ID is not {@code null}:\n{@code HasSupportedValueInfo.hasMinSupportedValue} and {@code HasSupportedValueInfo.hasMaxSupportedValue} must be {@code true} for the specific area ID.\n{@code MinMaxSupportedValueResult.minSupportedValue} indicates the lowest fan speed.\n{@code MinMaxSupportedValueResult.maxSupportedValue} indicates the highest fan speed.\nAll integers between minSupportedValue and maxSupportedValue must be supported.\nAt boot, minInt32Value is equal to minSupportedValue, maxInt32Value is equal to maxSupportedValue.\n\nThis property is not in any particular unit but in a specified range of relative speeds.\nThis property is defined as VehiclePropertyAccess.READ_WRITE, but OEMs have the option to implement it as VehiclePropertyAccess.READ only."
             },
             {
                 "name": "Fan direction setting",
diff --git a/automotive/vehicle/aidl/impl/current/hardware/include/IVehicleHardware.h b/automotive/vehicle/aidl/impl/current/hardware/include/IVehicleHardware.h
index 0684655..9122955 100644
--- a/automotive/vehicle/aidl/impl/current/hardware/include/IVehicleHardware.h
+++ b/automotive/vehicle/aidl/impl/current/hardware/include/IVehicleHardware.h
@@ -18,9 +18,11 @@
 #define android_hardware_automotive_vehicle_aidl_impl_hardware_include_IVehicleHardware_H_
 
 #include <VehicleHalTypes.h>
+#include <VehicleUtils.h>
 
 #include <memory>
 #include <optional>
+#include <unordered_set>
 #include <vector>
 
 namespace android {
@@ -59,10 +61,23 @@
     using GetValuesCallback = std::function<void(std::vector<aidlvhal::GetValueResult>)>;
     using PropertyChangeCallback = std::function<void(std::vector<aidlvhal::VehiclePropValue>)>;
     using PropertySetErrorCallback = std::function<void(std::vector<SetValueErrorEvent>)>;
+    using SupportedValueChangeCallback = std::function<void(std::vector<PropIdAreaId>)>;
 
     virtual ~IVehicleHardware() = default;
 
     // Get all the property configs.
+    //
+    // Note that {@code VehicleAreaConfig.HasSupportedValueInfo} field is newly introduced in VHAL
+    // V4 to specify whether the [propertyId, areaId] has specified min/max supported value or
+    // supported values list.
+    //
+    // Since IVehicleHardware is designed to be backward compatible, this field can be set to null.
+    // If this field is set to null, VHAL client should fallback to use min/max supported value
+    // information in {@code VehicleAreaConfig} and {@code supportedEnumVaules} for enum properties.
+    //
+    // It is highly recommended to specify {@code VehicleAreaConfig.HasSupportedValueInfo} for new
+    // property implementations, even if the property does not specify supported values or the
+    // supported values are static.
     virtual std::vector<aidlvhal::VehiclePropConfig> getAllPropertyConfigs() const = 0;
 
     // Get the property configs for the specified propId. This is used for early-boot
@@ -240,6 +255,78 @@
                                                   [[maybe_unused]] float sampleRate) {
         return aidlvhal::StatusCode::OK;
     }
+
+    // Gets the min/max supported values for each of the specified [propId, areaId]s.
+    //
+    // The returned result may change dynamically.
+    //
+    // This is only called for [propId, areaId] that has
+    // {@code HasSupportedValueInfo.hasMinSupportedValue} or
+    // {@code HasSupportedValueInfo.hasMinSupportedValue} set to true.
+    //
+    // Client must implement (override) this function if at least one [propId, areaId]'s
+    // {@code HasSupportedValueInfo} is not null.
+    virtual std::vector<aidlvhal::MinMaxSupportedValueResult> getMinMaxSupportedValues(
+            [[maybe_unused]] const std::vector<PropIdAreaId>& propIdAreaIds) {
+        return {};
+    }
+
+    // Gets the supported values list for each of the specified [propId, areaId]s.
+    //
+    // The returned result may change dynamically.
+    //
+    // This is only called for [propId, areaId] that has
+    // {@code HasSupportedValueInfo.hasSupportedValuesList} set to true.
+    //
+    // Client must implement (override) this function if at least one [propId, areaId]'s
+    // {@code HasSupportedValueInfo} is not null.
+    virtual std::vector<aidlvhal::SupportedValuesListResult> getSupportedValuesLists(
+            [[maybe_unused]] const std::vector<PropIdAreaId>& propIdAreaIds) {
+        return {};
+    }
+
+    // Register a callback that would be called when the min/max supported value or supported
+    // values list change dynamically for propertyID returned from
+    // getPropertyIdsThatImplementGetSupportedValue
+    //
+    // This function must only be called once during initialization.
+    //
+    // Client must implement (override) this function if at least one [propId, areaId]'s
+    // {@code HasSupportedValueInfo} is not null.
+    virtual void registerSupportedValueChangeCallback(
+            [[maybe_unused]] std::unique_ptr<const SupportedValueChangeCallback> callback) {
+        // Do nothing.
+    }
+
+    // Subscribes to the min/max supported value or supported values list change for the specified
+    // [propId, areaId]s.
+    //
+    // If the propertyId's supported values are static, then must do nothing.
+    //
+    // If some of the [propId, areaId]s are already subscribed, then do nothing.
+    //
+    // This is only called for [propId, areaId] that has non-null {@code HasSupportedValueInfo}.
+    //
+    // Client must implement (override) this function if at least one [propId, areaId]'s
+    // {@code HasSupportedValueInfo} is not null.
+    virtual aidlvhal::StatusCode subscribeSupportedValueChange(
+            [[maybe_unused]] const std::vector<PropIdAreaId>& propIdAreaIds) {
+        return aidlvhal::StatusCode::OK;
+    }
+
+    // Unsubscrbies to the min/max supported value or supported values list change.
+    //
+    // Must do nothing if the [propId, areaId] was not previously subscribed to for supported
+    // values change.
+    //
+    // This is only called for [propId, areaId] that has non-null {@code HasSupportedValueInfo}.
+    //
+    // Client must implement (override) this function if at least one [propId, areaId]'s
+    // {@code HasSupportedValueInfo} is not null.
+    virtual aidlvhal::StatusCode unsubscribeSupportedValueChange(
+            [[maybe_unused]] const std::vector<PropIdAreaId>& propIdAreaIds) {
+        return aidlvhal::StatusCode::OK;
+    }
 };
 
 }  // namespace vehicle
diff --git a/automotive/vehicle/aidl/impl/current/utils/common/include/VehicleHalTypes.h b/automotive/vehicle/aidl/impl/current/utils/common/include/VehicleHalTypes.h
index 4fa0a06..fcc006b 100644
--- a/automotive/vehicle/aidl/impl/current/utils/common/include/VehicleHalTypes.h
+++ b/automotive/vehicle/aidl/impl/current/utils/common/include/VehicleHalTypes.h
@@ -53,6 +53,8 @@
 #include <aidl/android/hardware/automotive/vehicle/LocationCharacterization.h>
 #include <aidl/android/hardware/automotive/vehicle/LowSpeedAutomaticEmergencyBrakingState.h>
 #include <aidl/android/hardware/automotive/vehicle/LowSpeedCollisionWarningState.h>
+#include <aidl/android/hardware/automotive/vehicle/MinMaxSupportedValueResult.h>
+#include <aidl/android/hardware/automotive/vehicle/MinMaxSupportedValueResults.h>
 #include <aidl/android/hardware/automotive/vehicle/Obd2CommonIgnitionMonitors.h>
 #include <aidl/android/hardware/automotive/vehicle/Obd2FuelSystemStatus.h>
 #include <aidl/android/hardware/automotive/vehicle/Obd2FuelType.h>
@@ -65,6 +67,8 @@
 #include <aidl/android/hardware/automotive/vehicle/SetValueResults.h>
 #include <aidl/android/hardware/automotive/vehicle/StatusCode.h>
 #include <aidl/android/hardware/automotive/vehicle/SubscribeOptions.h>
+#include <aidl/android/hardware/automotive/vehicle/SupportedValuesListResult.h>
+#include <aidl/android/hardware/automotive/vehicle/SupportedValuesListResults.h>
 #include <aidl/android/hardware/automotive/vehicle/VehicleAirbagLocation.h>
 #include <aidl/android/hardware/automotive/vehicle/VehicleApPowerBootupReason.h>
 #include <aidl/android/hardware/automotive/vehicle/VehicleApPowerStateReport.h>
diff --git a/automotive/vehicle/aidl/impl/current/utils/common/include/VehicleUtils.h b/automotive/vehicle/aidl/impl/current/utils/common/include/VehicleUtils.h
index 90a7c46..5b19100 100644
--- a/automotive/vehicle/aidl/impl/current/utils/common/include/VehicleUtils.h
+++ b/automotive/vehicle/aidl/impl/current/utils/common/include/VehicleUtils.h
@@ -310,6 +310,12 @@
     return toScopedAStatus(result, getErrorCode(result), additionalErrorMsg);
 }
 
+// This is for debug purpose only.
+inline std::string propIdToString(int32_t propId) {
+    return toString(
+            static_cast<aidl::android::hardware::automotive::vehicle::VehicleProperty>(propId));
+}
+
 struct PropIdAreaId {
     int32_t propId;
     int32_t areaId;
@@ -317,6 +323,11 @@
     inline bool operator==(const PropIdAreaId& other) const {
         return areaId == other.areaId && propId == other.propId;
     }
+
+    // This is for debug purpose only.
+    inline std::string toString() const {
+        return fmt::format("{{propId: {}, areaId: {}}}", propIdToString(propId), areaId);
+    }
 };
 
 struct PropIdAreaIdHash {
@@ -329,12 +340,6 @@
 };
 
 // This is for debug purpose only.
-inline std::string propIdToString(int32_t propId) {
-    return toString(
-            static_cast<aidl::android::hardware::automotive::vehicle::VehicleProperty>(propId));
-}
-
-// This is for debug purpose only.
 android::base::Result<int32_t> stringToPropId(const std::string& propName);
 
 // This is for debug purpose only. Converts an area's name to its enum definition.
@@ -362,4 +367,21 @@
 }  // namespace hardware
 }  // namespace android
 
+// Formatter must not be defined inside our namespace.
+template <>
+struct fmt::formatter<android::hardware::automotive::vehicle::PropIdAreaId> {
+    template <typename ParseContext>
+    constexpr auto parse(ParseContext& ctx) {
+        return ctx.begin();
+    }
+
+    template <typename FormatContext>
+    auto format(const android::hardware::automotive::vehicle::PropIdAreaId& p,
+                FormatContext& ctx) const {
+        return fmt::format_to(ctx.out(), "{{propId: {}, areaId: {}}}",
+                              android::hardware::automotive::vehicle::propIdToString(p.propId),
+                              p.areaId);
+    }
+};
+
 #endif  // android_hardware_automotive_vehicle_aidl_impl_utils_common_include_VehicleUtils_H_
diff --git a/automotive/vehicle/aidl/impl/current/utils/common/test/VehicleUtilsTest.cpp b/automotive/vehicle/aidl/impl/current/utils/common/test/VehicleUtilsTest.cpp
index 1048877..8278376 100644
--- a/automotive/vehicle/aidl/impl/current/utils/common/test/VehicleUtilsTest.cpp
+++ b/automotive/vehicle/aidl/impl/current/utils/common/test/VehicleUtilsTest.cpp
@@ -787,6 +787,29 @@
     ASSERT_FALSE(result.ok());
 }
 
+TEST(VehicleUtilsTest, testPropIdAreaIdToString) {
+    PropIdAreaId propIdAreaId = {
+            .propId = toInt(VehicleProperty::PERF_VEHICLE_SPEED),
+            .areaId = 0,
+    };
+
+    ASSERT_EQ(propIdAreaId.toString(), "{propId: PERF_VEHICLE_SPEED, areaId: 0}");
+}
+
+TEST(VehicleUtilsTest, testPropIdAreaIdFormatter) {
+    PropIdAreaId propIdAreaId1 = {
+            .propId = toInt(VehicleProperty::PERF_VEHICLE_SPEED),
+            .areaId = 0,
+    };
+    PropIdAreaId propIdAreaId2 = {
+            .propId = toInt(VehicleProperty::HVAC_FAN_SPEED),
+            .areaId = 1,
+    };
+
+    ASSERT_EQ(fmt::format("{}", std::vector<PropIdAreaId>{propIdAreaId1, propIdAreaId2}),
+              "[{propId: PERF_VEHICLE_SPEED, areaId: 0}, {propId: HVAC_FAN_SPEED, areaId: 1}]");
+}
+
 class InvalidPropValueTest : public testing::TestWithParam<InvalidPropValueTestCase> {};
 
 INSTANTIATE_TEST_SUITE_P(InvalidPropValueTests, InvalidPropValueTest,
diff --git a/automotive/vehicle/aidl/impl/current/vhal/include/DefaultVehicleHal.h b/automotive/vehicle/aidl/impl/current/vhal/include/DefaultVehicleHal.h
index 5d64e6f..02dbe9e 100644
--- a/automotive/vehicle/aidl/impl/current/vhal/include/DefaultVehicleHal.h
+++ b/automotive/vehicle/aidl/impl/current/vhal/include/DefaultVehicleHal.h
@@ -233,6 +233,10 @@
             std::function<void(const std::unordered_map<int32_t, aidlvhal::VehiclePropConfig>&)>
                     callback) const EXCLUDES(mConfigLock);
 
+    android::base::Result<aidlvhal::VehicleAreaConfig> getAreaConfigForPropIdAreaId(
+            int32_t propId, int32_t areaId) const;
+    android::base::Result<aidlvhal::HasSupportedValueInfo> getHasSupportedValueInfo(
+            int32_t propId, int32_t areaId) const;
     // Puts the property change events into a queue so that they can handled in batch.
     static void batchPropertyChangeEvent(
             const std::weak_ptr<ConcurrentQueue<aidlvhal::VehiclePropValue>>& batchedEventQueue,
diff --git a/automotive/vehicle/aidl/impl/current/vhal/include/SubscriptionManager.h b/automotive/vehicle/aidl/impl/current/vhal/include/SubscriptionManager.h
index 2f16fca..59c21aa 100644
--- a/automotive/vehicle/aidl/impl/current/vhal/include/SubscriptionManager.h
+++ b/automotive/vehicle/aidl/impl/current/vhal/include/SubscriptionManager.h
@@ -95,15 +95,14 @@
             bool isContinuousProperty);
 
     // Unsubscribes from the properties for the client.
-    // Returns error if the client was not subscribed before, or one of the given property was not
-    // subscribed, or one of the property failed to unsubscribe. Caller is safe to retry since
+    // Returns error if one of the property failed to unsubscribe. Caller is safe to retry since
     // unsubscribing to an already unsubscribed property is okay (it would be ignored).
     // Returns ok if all the requested properties for the client are unsubscribed.
     VhalResult<void> unsubscribe(ClientIdType client, const std::vector<int32_t>& propIds);
 
     // Unsubscribes from all the properties for the client.
-    // Returns error if the client was not subscribed before or one of the subscribed properties
-    // for the client failed to unsubscribe. Caller is safe to retry.
+    // Returns error one of the subscribed properties for the client failed to unsubscribe.
+    // Caller is safe to retry.
     // Returns ok if all the properties for the client are unsubscribed.
     VhalResult<void> unsubscribe(ClientIdType client);
 
@@ -119,8 +118,19 @@
                        std::vector<aidl::android::hardware::automotive::vehicle::VehiclePropError>>
     getSubscribedClientsForErrorEvents(const std::vector<SetValueErrorEvent>& errorEvents);
 
-    // Returns the number of subscribed clients.
-    size_t countClients();
+    // Subscribes to supported values change.
+    VhalResult<void> subscribeSupportedValueChange(const CallbackType& callback,
+                                                   const std::vector<PropIdAreaId>& propIdAreaIds);
+
+    // Unsubscribes to supported values change.
+    VhalResult<void> unsubscribeSupportedValueChange(
+            ClientIdType client, const std::vector<PropIdAreaId>& propIdAreaIds);
+
+    // Returns the number of subscribed property change clients.
+    size_t countPropertyChangeClients();
+
+    // Returns the number of subscribed supported value change clients.
+    size_t countSupportedValueChangeClients();
 
     // Checks whether the sample rate is valid.
     static bool checkSampleRateHz(float sampleRateHz);
@@ -161,6 +171,11 @@
                        std::unordered_set<VehiclePropValue, VehiclePropValueHashPropIdAreaId,
                                           VehiclePropValueEqualPropIdAreaId>>
             mContSubValuesByCallback GUARDED_BY(mLock);
+    std::unordered_map<PropIdAreaId, std::unordered_map<ClientIdType, CallbackType>,
+                       PropIdAreaIdHash>
+            mSupportedValueChangeClientsByPropIdAreaId GUARDED_BY(mLock);
+    std::unordered_map<ClientIdType, std::unordered_set<PropIdAreaId, PropIdAreaIdHash>>
+            mSupportedValueChangePropIdAreaIdsByClient GUARDED_BY(mLock);
 
     VhalResult<void> addContinuousSubscriberLocked(const ClientIdType& clientId,
                                                    const PropIdAreaId& propIdAreaId,
@@ -181,6 +196,9 @@
     VhalResult<void> unsubscribePropIdAreaIdLocked(SubscriptionManager::ClientIdType clientId,
                                                    const PropIdAreaId& propIdAreaId)
             REQUIRES(mLock);
+    VhalResult<void> unsubscribeSupportedValueChangeLocked(
+            SubscriptionManager::ClientIdType clientId,
+            const std::vector<PropIdAreaId>& propIdAreaIds) REQUIRES(mLock);
 
     // Checks whether the manager is empty. For testing purpose.
     bool isEmpty();
diff --git a/automotive/vehicle/aidl/impl/current/vhal/src/DefaultVehicleHal.cpp b/automotive/vehicle/aidl/impl/current/vhal/src/DefaultVehicleHal.cpp
index 1e55a1a..25af50e 100644
--- a/automotive/vehicle/aidl/impl/current/vhal/src/DefaultVehicleHal.cpp
+++ b/automotive/vehicle/aidl/impl/current/vhal/src/DefaultVehicleHal.cpp
@@ -49,7 +49,9 @@
 using ::aidl::android::hardware::automotive::vehicle::GetValueRequests;
 using ::aidl::android::hardware::automotive::vehicle::GetValueResult;
 using ::aidl::android::hardware::automotive::vehicle::GetValueResults;
+using ::aidl::android::hardware::automotive::vehicle::HasSupportedValueInfo;
 using ::aidl::android::hardware::automotive::vehicle::IVehicleCallback;
+using ::aidl::android::hardware::automotive::vehicle::MinMaxSupportedValueResult;
 using ::aidl::android::hardware::automotive::vehicle::MinMaxSupportedValueResults;
 using ::aidl::android::hardware::automotive::vehicle::SetValueRequest;
 using ::aidl::android::hardware::automotive::vehicle::SetValueRequests;
@@ -57,6 +59,7 @@
 using ::aidl::android::hardware::automotive::vehicle::SetValueResults;
 using ::aidl::android::hardware::automotive::vehicle::StatusCode;
 using ::aidl::android::hardware::automotive::vehicle::SubscribeOptions;
+using ::aidl::android::hardware::automotive::vehicle::SupportedValuesListResult;
 using ::aidl::android::hardware::automotive::vehicle::SupportedValuesListResults;
 using ::aidl::android::hardware::automotive::vehicle::VehicleAreaConfig;
 using ::aidl::android::hardware::automotive::vehicle::VehiclePropConfig;
@@ -77,6 +80,8 @@
 using ::ndk::ScopedAStatus;
 using ::ndk::ScopedFileDescriptor;
 
+using VhalPropIdAreaId = ::aidl::android::hardware::automotive::vehicle::PropIdAreaId;
+
 std::string toString(const std::unordered_set<int64_t>& values) {
     std::string str = "";
     for (auto it = values.begin(); it != values.end(); it++) {
@@ -964,32 +969,223 @@
     return ScopedAStatus::ok();
 }
 
+Result<VehicleAreaConfig> DefaultVehicleHal::getAreaConfigForPropIdAreaId(int32_t propId,
+                                                                          int32_t areaId) const {
+    auto result = getConfig(propId);
+    if (!result.ok()) {
+        return Error() << "Failed to get property config for propertyId: " << propIdToString(propId)
+                       << ", error: " << result.error();
+    }
+    const VehiclePropConfig& config = result.value();
+    const VehicleAreaConfig* areaConfig = getAreaConfig(propId, areaId, config);
+    if (areaConfig == nullptr) {
+        return Error() << "AreaId config not found for propertyId: " << propIdToString(propId)
+                       << ", areaId: " << areaId;
+    }
+    return *areaConfig;
+}
+
+Result<HasSupportedValueInfo> DefaultVehicleHal::getHasSupportedValueInfo(int32_t propId,
+                                                                          int32_t areaId) const {
+    Result<VehicleAreaConfig> propIdAreaIdConfigResult =
+            getAreaConfigForPropIdAreaId(propId, areaId);
+    if (!isGlobalProp(propId) && !propIdAreaIdConfigResult.ok()) {
+        // For global property, it is possible that no config exists.
+        return Error() << propIdAreaIdConfigResult.error();
+    }
+    if (propIdAreaIdConfigResult.has_value()) {
+        auto areaConfig = propIdAreaIdConfigResult.value();
+        if (areaConfig.hasSupportedValueInfo.has_value()) {
+            return areaConfig.hasSupportedValueInfo.value();
+        }
+    }
+    return Error() << "property: " << propIdToString(propId) << ", areaId: " << areaId
+                   << " does not support this operation because hasSupportedValueInfo is null";
+}
+
 ScopedAStatus DefaultVehicleHal::getSupportedValuesLists(
-        const std::vector<::aidl::android::hardware::automotive::vehicle::PropIdAreaId>&,
-        SupportedValuesListResults*) {
-    // TODO(b/381020465): Add relevant implementation.
-    return ScopedAStatus::fromExceptionCode(EX_UNSUPPORTED_OPERATION);
+        const std::vector<VhalPropIdAreaId>& vhalPropIdAreaIds,
+        SupportedValuesListResults* supportedValuesListResults) {
+    std::vector<size_t> toHardwareRequestCounters;
+    std::vector<PropIdAreaId> toHardwarePropIdAreaIds;
+    std::vector<SupportedValuesListResult> results;
+    results.resize(vhalPropIdAreaIds.size());
+    for (size_t requestCounter = 0; requestCounter < vhalPropIdAreaIds.size(); requestCounter++) {
+        const auto& vhalPropIdAreaId = vhalPropIdAreaIds.at(requestCounter);
+        int32_t propId = vhalPropIdAreaId.propId;
+        int32_t areaId = vhalPropIdAreaId.areaId;
+        auto hasSupportedValueInfoResult = getHasSupportedValueInfo(propId, areaId);
+        if (!hasSupportedValueInfoResult.ok()) {
+            ALOGE("getSupportedValuesLists: %s",
+                  hasSupportedValueInfoResult.error().message().c_str());
+            results[requestCounter] = SupportedValuesListResult{
+                    .status = StatusCode::INVALID_ARG, .supportedValuesList = std::nullopt};
+            continue;
+        }
+
+        const auto& hasSupportedValueInfo = hasSupportedValueInfoResult.value();
+        if (hasSupportedValueInfo.hasSupportedValuesList) {
+            toHardwarePropIdAreaIds.push_back(PropIdAreaId{.propId = propId, .areaId = areaId});
+            toHardwareRequestCounters.push_back(requestCounter);
+        } else {
+            results[requestCounter] = SupportedValuesListResult{
+                    .status = StatusCode::OK, .supportedValuesList = std::nullopt};
+            continue;
+        }
+    }
+    if (toHardwarePropIdAreaIds.size() != 0) {
+        std::vector<SupportedValuesListResult> resultsFromHardware =
+                mVehicleHardware->getSupportedValuesLists(toHardwarePropIdAreaIds);
+        // It is guaranteed that toHardwarePropIdAreaIds, toHardwareRequestCounters,
+        // resultsFromHardware have the same size.
+        if (resultsFromHardware.size() != toHardwareRequestCounters.size()) {
+            return ScopedAStatus::fromServiceSpecificErrorWithMessage(
+                    toInt(StatusCode::INTERNAL_ERROR),
+                    fmt::format(
+                            "getSupportedValuesLists: Unexpected results size from IVehicleHardware"
+                            ", got: {}, expect: {}",
+                            resultsFromHardware.size(), toHardwareRequestCounters.size())
+                            .c_str());
+        }
+        for (size_t i = 0; i < toHardwareRequestCounters.size(); i++) {
+            results[toHardwareRequestCounters[i]] = resultsFromHardware[i];
+        }
+    }
+    ScopedAStatus status =
+            vectorToStableLargeParcelable(std::move(results), supportedValuesListResults);
+    if (!status.isOk()) {
+        int statusCode = status.getServiceSpecificError();
+        ALOGE("getSupportedValuesLists: failed to marshal result into large parcelable, error: "
+              "%s, code: %d",
+              status.getMessage(), statusCode);
+        return status;
+    }
+    return ScopedAStatus::ok();
 }
 
 ScopedAStatus DefaultVehicleHal::getMinMaxSupportedValue(
-        const std::vector<::aidl::android::hardware::automotive::vehicle::PropIdAreaId>&,
-        MinMaxSupportedValueResults*) {
-    // TODO(b/381020465): Add relevant implementation.
-    return ScopedAStatus::fromExceptionCode(EX_UNSUPPORTED_OPERATION);
+        const std::vector<VhalPropIdAreaId>& vhalPropIdAreaIds,
+        MinMaxSupportedValueResults* minMaxSupportedValueResults) {
+    std::vector<size_t> toHardwareRequestCounters;
+    std::vector<PropIdAreaId> toHardwarePropIdAreaIds;
+    std::vector<MinMaxSupportedValueResult> results;
+    results.resize(vhalPropIdAreaIds.size());
+    for (size_t requestCounter = 0; requestCounter < vhalPropIdAreaIds.size(); requestCounter++) {
+        const auto& vhalPropIdAreaId = vhalPropIdAreaIds.at(requestCounter);
+        int32_t propId = vhalPropIdAreaId.propId;
+        int32_t areaId = vhalPropIdAreaId.areaId;
+        auto hasSupportedValueInfoResult = getHasSupportedValueInfo(propId, areaId);
+        if (!hasSupportedValueInfoResult.ok()) {
+            ALOGE("getMinMaxSupportedValue: %s",
+                  hasSupportedValueInfoResult.error().message().c_str());
+            results[requestCounter] = MinMaxSupportedValueResult{.status = StatusCode::INVALID_ARG,
+                                                                 .minSupportedValue = std::nullopt,
+                                                                 .maxSupportedValue = std::nullopt};
+            continue;
+        }
+
+        const auto& hasSupportedValueInfo = hasSupportedValueInfoResult.value();
+        if (hasSupportedValueInfo.hasMinSupportedValue ||
+            hasSupportedValueInfo.hasMaxSupportedValue) {
+            toHardwarePropIdAreaIds.push_back(PropIdAreaId{.propId = propId, .areaId = areaId});
+            toHardwareRequestCounters.push_back(requestCounter);
+        } else {
+            results[requestCounter] = MinMaxSupportedValueResult{.status = StatusCode::OK,
+                                                                 .minSupportedValue = std::nullopt,
+                                                                 .maxSupportedValue = std::nullopt};
+            continue;
+        }
+    }
+    if (toHardwarePropIdAreaIds.size() != 0) {
+        std::vector<MinMaxSupportedValueResult> resultsFromHardware =
+                mVehicleHardware->getMinMaxSupportedValues(toHardwarePropIdAreaIds);
+        // It is guaranteed that toHardwarePropIdAreaIds, toHardwareRequestCounters,
+        // resultsFromHardware have the same size.
+        if (resultsFromHardware.size() != toHardwareRequestCounters.size()) {
+            return ScopedAStatus::fromServiceSpecificErrorWithMessage(
+                    toInt(StatusCode::INTERNAL_ERROR),
+                    fmt::format(
+                            "getMinMaxSupportedValue: Unexpected results size from IVehicleHardware"
+                            ", got: {}, expect: {}",
+                            resultsFromHardware.size(), toHardwareRequestCounters.size())
+                            .c_str());
+        }
+        for (size_t i = 0; i < toHardwareRequestCounters.size(); i++) {
+            results[toHardwareRequestCounters[i]] = resultsFromHardware[i];
+        }
+    }
+    ScopedAStatus status =
+            vectorToStableLargeParcelable(std::move(results), minMaxSupportedValueResults);
+    if (!status.isOk()) {
+        int statusCode = status.getServiceSpecificError();
+        ALOGE("getMinMaxSupportedValue: failed to marshal result into large parcelable, error: "
+              "%s, code: %d",
+              status.getMessage(), statusCode);
+        return status;
+    }
+    return ScopedAStatus::ok();
 }
 
 ScopedAStatus DefaultVehicleHal::registerSupportedValueChangeCallback(
-        const std::shared_ptr<IVehicleCallback>&,
-        const std::vector<::aidl::android::hardware::automotive::vehicle::PropIdAreaId>&) {
-    // TODO(b/381020465): Add relevant implementation.
-    return ScopedAStatus::fromExceptionCode(EX_UNSUPPORTED_OPERATION);
+        const std::shared_ptr<IVehicleCallback>& callback,
+        const std::vector<VhalPropIdAreaId>& vhalPropIdAreaIds) {
+    std::vector<PropIdAreaId> propIdAreaIdsToSubscribe;
+    for (size_t i = 0; i < vhalPropIdAreaIds.size(); i++) {
+        const auto& vhalPropIdAreaId = vhalPropIdAreaIds.at(i);
+        int32_t propId = vhalPropIdAreaId.propId;
+        int32_t areaId = vhalPropIdAreaId.areaId;
+        auto hasSupportedValueInfoResult = getHasSupportedValueInfo(propId, areaId);
+        if (!hasSupportedValueInfoResult.ok()) {
+            ALOGE("registerSupportedValueChangeCallback not supported: %s",
+                  hasSupportedValueInfoResult.error().message().c_str());
+            return toScopedAStatus(hasSupportedValueInfoResult, StatusCode::INVALID_ARG);
+        }
+        const auto& hasSupportedValueInfo = hasSupportedValueInfoResult.value();
+        if (!hasSupportedValueInfo.hasMinSupportedValue &&
+            !hasSupportedValueInfo.hasMaxSupportedValue &&
+            !hasSupportedValueInfo.hasSupportedValuesList) {
+            ALOGW("registerSupportedValueChangeCallback: do nothing for property: %s, "
+                  "areaId: %" PRId32
+                  ", no min/max supported values or supported values list"
+                  " specified",
+                  propIdToString(propId).c_str(), areaId);
+            continue;
+        }
+        propIdAreaIdsToSubscribe.push_back(PropIdAreaId{.propId = propId, .areaId = areaId});
+    }
+    if (propIdAreaIdsToSubscribe.empty()) {
+        return ScopedAStatus::ok();
+    }
+    auto result =
+            mSubscriptionManager->subscribeSupportedValueChange(callback, propIdAreaIdsToSubscribe);
+    if (!result.ok()) {
+        ALOGW("registerSupportedValueChangeCallback: failed to subscribe supported value change"
+              " for %s, error: %s",
+              fmt::format("{}", propIdAreaIdsToSubscribe).c_str(),
+              result.error().message().c_str());
+        return toScopedAStatus(result);
+    }
+    return ScopedAStatus::ok();
 }
 
 ScopedAStatus DefaultVehicleHal::unregisterSupportedValueChangeCallback(
-        const std::shared_ptr<IVehicleCallback>&,
-        const std::vector<::aidl::android::hardware::automotive::vehicle::PropIdAreaId>&) {
-    // TODO(b/381020465): Add relevant implementation.
-    return ScopedAStatus::fromExceptionCode(EX_UNSUPPORTED_OPERATION);
+        const std::shared_ptr<IVehicleCallback>& callback,
+        const std::vector<VhalPropIdAreaId>& vhalPropIdAreaIds) {
+    std::vector<PropIdAreaId> propIdAreaIds;
+    for (const auto& vhalPropIdAreaId : vhalPropIdAreaIds) {
+        propIdAreaIds.push_back(
+                PropIdAreaId{.propId = vhalPropIdAreaId.propId, .areaId = vhalPropIdAreaId.areaId});
+    }
+
+    auto result = mSubscriptionManager->unsubscribeSupportedValueChange(callback->asBinder().get(),
+                                                                        propIdAreaIds);
+    if (!result.ok()) {
+        ALOGW("unregisterSupportedValueChangeCallback: failed to unsubscribe supported value change"
+              " for %s, error: %s",
+              fmt::format("{}", propIdAreaIds).c_str(), result.error().message().c_str());
+        return toScopedAStatus(result);
+    }
+    return ScopedAStatus::ok();
 }
 
 IVehicleHardware* DefaultVehicleHal::getHardware() {
@@ -1107,12 +1303,14 @@
         dprintf(fd, "Currently have %zu getValues clients\n", mGetValuesClients.size());
         dprintf(fd, "Currently have %zu setValues clients\n", mSetValuesClients.size());
         dprintf(fd, "Currently have %zu subscribe clients\n", countSubscribeClients());
+        dprintf(fd, "Currently have %zu supported values change subscribe clients\n",
+                mSubscriptionManager->countSupportedValueChangeClients());
     }
     return STATUS_OK;
 }
 
 size_t DefaultVehicleHal::countSubscribeClients() {
-    return mSubscriptionManager->countClients();
+    return mSubscriptionManager->countPropertyChangeClients();
 }
 
 }  // namespace vehicle
diff --git a/automotive/vehicle/aidl/impl/current/vhal/src/SubscriptionManager.cpp b/automotive/vehicle/aidl/impl/current/vhal/src/SubscriptionManager.cpp
index 14ee707..f790033 100644
--- a/automotive/vehicle/aidl/impl/current/vhal/src/SubscriptionManager.cpp
+++ b/automotive/vehicle/aidl/impl/current/vhal/src/SubscriptionManager.cpp
@@ -17,6 +17,7 @@
 #include "SubscriptionManager.h"
 
 #include <VehicleUtils.h>
+#include <android-base/format.h>
 #include <android-base/stringprintf.h>
 #include <utils/Log.h>
 #include <utils/SystemClock.h>
@@ -65,6 +66,8 @@
 
     mClientsByPropIdAreaId.clear();
     mSubscribedPropsByClient.clear();
+    mSupportedValueChangeClientsByPropIdAreaId.clear();
+    mSupportedValueChangePropIdAreaIdsByClient.clear();
 }
 
 bool SubscriptionManager::checkSampleRateHz(float sampleRateHz) {
@@ -166,8 +169,7 @@
                                     /*enableVur*/ false));
         status != StatusCode::OK) {
         return StatusError(status)
-               << StringPrintf("failed subscribe for prop: %s, areaId: %" PRId32,
-                               propIdToString(propId).c_str(), areaId);
+               << fmt::format("failed subscribe for propIdAreaId: {}", propIdAreaId);
     }
     return {};
 }
@@ -345,8 +347,8 @@
     std::scoped_lock<std::mutex> lockGuard(mLock);
 
     if (mSubscribedPropsByClient.find(clientId) == mSubscribedPropsByClient.end()) {
-        return StatusError(StatusCode::INVALID_ARG)
-               << "No property was subscribed for the callback";
+        ALOGW("No property was subscribed for the callback, unsubscribe does nothing");
+        return {};
     }
 
     std::vector<PropIdAreaId> propIdAreaIdsToUnsubscribe;
@@ -378,16 +380,112 @@
     std::scoped_lock<std::mutex> lockGuard(mLock);
 
     if (mSubscribedPropsByClient.find(clientId) == mSubscribedPropsByClient.end()) {
-        return StatusError(StatusCode::INVALID_ARG) << "No property was subscribed for this client";
+        ALOGW("No property was subscribed for this client, unsubscribe does nothing");
+    } else {
+        auto& propIdAreaIds = mSubscribedPropsByClient[clientId];
+        for (auto const& propIdAreaId : propIdAreaIds) {
+            if (auto result = unsubscribePropIdAreaIdLocked(clientId, propIdAreaId); !result.ok()) {
+                return result;
+            }
+        }
+        mSubscribedPropsByClient.erase(clientId);
     }
 
-    auto& subscriptions = mSubscribedPropsByClient[clientId];
-    for (auto const& propIdAreaId : subscriptions) {
-        if (auto result = unsubscribePropIdAreaIdLocked(clientId, propIdAreaId); !result.ok()) {
+    if (mSupportedValueChangePropIdAreaIdsByClient.find(clientId) ==
+        mSupportedValueChangePropIdAreaIdsByClient.end()) {
+        ALOGW("No supported value change was subscribed for this client, unsubscribe does nothing");
+    } else {
+        const auto& propIdAreaIds = mSupportedValueChangePropIdAreaIdsByClient[clientId];
+        if (auto result = unsubscribeSupportedValueChangeLocked(
+                    clientId,
+                    std::vector<PropIdAreaId>(propIdAreaIds.begin(), propIdAreaIds.end()));
+            !result.ok()) {
             return result;
         }
     }
-    mSubscribedPropsByClient.erase(clientId);
+    return {};
+}
+
+VhalResult<void> SubscriptionManager::subscribeSupportedValueChange(
+        const std::shared_ptr<IVehicleCallback>& callback,
+        const std::vector<PropIdAreaId>& propIdAreaIds) {
+    // Need to make sure this whole operation is guarded by a lock so that our internal state is
+    // consistent with IVehicleHardware state.
+    std::scoped_lock<std::mutex> lockGuard(mLock);
+
+    ClientIdType clientId = callback->asBinder().get();
+
+    // It is possible that some of the [propId, areaId]s are already subscribed, IVehicleHardware
+    // will ignore them.
+    if (auto status = mVehicleHardware->subscribeSupportedValueChange(propIdAreaIds);
+        status != StatusCode::OK) {
+        return StatusError(status)
+               << fmt::format("failed to call subscribeSupportedValueChange for propIdAreaIds: {}",
+                              propIdAreaIds);
+    }
+    for (const auto& propIdAreaId : propIdAreaIds) {
+        mSupportedValueChangeClientsByPropIdAreaId[propIdAreaId][clientId] = callback;
+        // mSupportedValueChangePropIdAreaIdsByClient[clientId] is a set so this will ignore
+        // duplicate [propId, areaId].
+        mSupportedValueChangePropIdAreaIdsByClient[clientId].insert(propIdAreaId);
+    }
+    return {};
+}
+
+VhalResult<void> SubscriptionManager::unsubscribeSupportedValueChange(
+        SubscriptionManager::ClientIdType clientId,
+        const std::vector<PropIdAreaId>& propIdAreaIds) {
+    // Need to make sure this whole operation is guarded by a lock so that our internal state is
+    // consistent with IVehicleHardware state.
+    std::scoped_lock<std::mutex> lockGuard(mLock);
+
+    return unsubscribeSupportedValueChangeLocked(clientId, propIdAreaIds);
+}
+
+VhalResult<void> SubscriptionManager::unsubscribeSupportedValueChangeLocked(
+        SubscriptionManager::ClientIdType clientId,
+        const std::vector<PropIdAreaId>& propIdAreaIds) {
+    std::vector<PropIdAreaId> propIdAreaIdsToUnsubscribe;
+
+    // Check which [propId, areaId] needs to be unsubscribed from the hardware.
+    for (const auto& propIdAreaId : propIdAreaIds) {
+        auto it = mSupportedValueChangeClientsByPropIdAreaId.find(propIdAreaId);
+        if (it != mSupportedValueChangeClientsByPropIdAreaId.end()) {
+            const auto& clients = it->second;
+            if (clients.size() == 1 && clients.find(clientId) != clients.end()) {
+                // This callback is the only client registered for [propId, areaId].
+                // Unregister it should unregister the [propId, areaId].
+                propIdAreaIdsToUnsubscribe.push_back(propIdAreaId);
+            }
+        }
+    }
+
+    // Send the unsubscribe request.
+    if (!propIdAreaIdsToUnsubscribe.empty()) {
+        if (auto status =
+                    mVehicleHardware->unsubscribeSupportedValueChange(propIdAreaIdsToUnsubscribe);
+            status != StatusCode::OK) {
+            return StatusError(status) << fmt::format(
+                           "failed to call unsubscribeSupportedValueChange for "
+                           "propIdAreaIds: {}",
+                           propIdAreaIdsToUnsubscribe);
+        }
+    }
+
+    // Remove internal book-keeping.
+    for (const auto& propIdAreaId : propIdAreaIds) {
+        if (mSupportedValueChangeClientsByPropIdAreaId.find(propIdAreaId) !=
+            mSupportedValueChangeClientsByPropIdAreaId.end()) {
+            mSupportedValueChangeClientsByPropIdAreaId[propIdAreaId].erase(clientId);
+        }
+        if (mSupportedValueChangeClientsByPropIdAreaId.empty()) {
+            mSupportedValueChangeClientsByPropIdAreaId.erase(propIdAreaId);
+        }
+        mSupportedValueChangePropIdAreaIdsByClient[clientId].erase(propIdAreaId);
+        if (mSupportedValueChangePropIdAreaIdsByClient[clientId].empty()) {
+            mSupportedValueChangePropIdAreaIdsByClient.erase(clientId);
+        }
+    }
     return {};
 }
 
@@ -485,14 +583,21 @@
 
 bool SubscriptionManager::isEmpty() {
     std::scoped_lock<std::mutex> lockGuard(mLock);
-    return mSubscribedPropsByClient.empty() && mClientsByPropIdAreaId.empty();
+    return mSubscribedPropsByClient.empty() && mClientsByPropIdAreaId.empty() &&
+           mSupportedValueChangeClientsByPropIdAreaId.empty() &&
+           mSupportedValueChangePropIdAreaIdsByClient.empty();
 }
 
-size_t SubscriptionManager::countClients() {
+size_t SubscriptionManager::countPropertyChangeClients() {
     std::scoped_lock<std::mutex> lockGuard(mLock);
     return mSubscribedPropsByClient.size();
 }
 
+size_t SubscriptionManager::countSupportedValueChangeClients() {
+    std::scoped_lock<std::mutex> lockGuard(mLock);
+    return mSupportedValueChangePropIdAreaIdsByClient.size();
+}
+
 }  // namespace vehicle
 }  // namespace automotive
 }  // namespace hardware
diff --git a/automotive/vehicle/aidl/impl/current/vhal/test/DefaultVehicleHalTest.cpp b/automotive/vehicle/aidl/impl/current/vhal/test/DefaultVehicleHalTest.cpp
index ad34a4c..0526f7d 100644
--- a/automotive/vehicle/aidl/impl/current/vhal/test/DefaultVehicleHalTest.cpp
+++ b/automotive/vehicle/aidl/impl/current/vhal/test/DefaultVehicleHalTest.cpp
@@ -21,6 +21,7 @@
 
 #include <IVehicleHardware.h>
 #include <LargeParcelableBase.h>
+#include <aidl/android/hardware/automotive/vehicle/HasSupportedValueInfo.h>
 #include <aidl/android/hardware/automotive/vehicle/IVehicle.h>
 #include <aidl/android/hardware/automotive/vehicle/IVehicleCallback.h>
 
@@ -51,14 +52,20 @@
 using ::aidl::android::hardware::automotive::vehicle::GetValueRequests;
 using ::aidl::android::hardware::automotive::vehicle::GetValueResult;
 using ::aidl::android::hardware::automotive::vehicle::GetValueResults;
+using ::aidl::android::hardware::automotive::vehicle::HasSupportedValueInfo;
 using ::aidl::android::hardware::automotive::vehicle::IVehicle;
 using ::aidl::android::hardware::automotive::vehicle::IVehicleCallback;
+using ::aidl::android::hardware::automotive::vehicle::MinMaxSupportedValueResult;
+using ::aidl::android::hardware::automotive::vehicle::MinMaxSupportedValueResults;
+using ::aidl::android::hardware::automotive::vehicle::RawPropValues;
 using ::aidl::android::hardware::automotive::vehicle::SetValueRequest;
 using ::aidl::android::hardware::automotive::vehicle::SetValueRequests;
 using ::aidl::android::hardware::automotive::vehicle::SetValueResult;
 using ::aidl::android::hardware::automotive::vehicle::SetValueResults;
 using ::aidl::android::hardware::automotive::vehicle::StatusCode;
 using ::aidl::android::hardware::automotive::vehicle::SubscribeOptions;
+using ::aidl::android::hardware::automotive::vehicle::SupportedValuesListResult;
+using ::aidl::android::hardware::automotive::vehicle::SupportedValuesListResults;
 using ::aidl::android::hardware::automotive::vehicle::VehicleAreaConfig;
 using ::aidl::android::hardware::automotive::vehicle::VehicleAreaWindow;
 using ::aidl::android::hardware::automotive::vehicle::VehiclePropConfig;
@@ -85,6 +92,8 @@
 using ::testing::UnorderedElementsAreArray;
 using ::testing::WhenSortedBy;
 
+using VhalPropIdAreaId = ::aidl::android::hardware::automotive::vehicle::PropIdAreaId;
+
 constexpr int32_t INVALID_PROP_ID = 0;
 // VehiclePropertyGroup:VENDOR,VehicleArea:WINDOW,VehiclePropertyType:INT32
 constexpr int32_t INT32_WINDOW_PROP = 10001 + 0x20000000 + 0x03000000 + 0x00400000;
@@ -112,6 +121,11 @@
     return static_cast<int32_t>(i) + 0x20000000 + 0x01000000 + 0x00410000;
 }
 
+int32_t testInt32VecWindowProp(size_t i) {
+    // VehiclePropertyGroup:VENDOR,VehicleArea:WINDOW,VehiclePropertyType:INT32_VEC
+    return static_cast<int32_t>(i) + 0x20000000 + 0x03000000 + 0x00410000;
+}
+
 std::string toString(const std::vector<SubscribeOptions>& options) {
     std::string optionsStr;
     for (const auto& option : options) {
@@ -1828,12 +1842,11 @@
     ASSERT_EQ(status.getServiceSpecificError(), toInt(StatusCode::ACCESS_DENIED));
 }
 
-TEST_F(DefaultVehicleHalTest, testUnsubscribeFailure) {
+TEST_F(DefaultVehicleHalTest, testUnsubscribeNotSubscribedProperty) {
     auto status = getClient()->unsubscribe(getCallbackClient(),
                                            std::vector<int32_t>({GLOBAL_ON_CHANGE_PROP}));
 
-    ASSERT_FALSE(status.isOk()) << "unsubscribe to a not-subscribed property must fail";
-    ASSERT_EQ(status.getServiceSpecificError(), toInt(StatusCode::INVALID_ARG));
+    ASSERT_TRUE(status.isOk()) << "unsubscribe to a not-subscribed property must do nothing";
 }
 
 TEST_F(DefaultVehicleHalTest, testHeartbeatEvent) {
@@ -2121,6 +2134,489 @@
     }
 }
 
+TEST_F(DefaultVehicleHalTest, testGetSupportedValuesLists) {
+    auto testConfigs = std::vector<VehiclePropConfig>(
+            {// This ia valid request, but no supported values are specified.
+             VehiclePropConfig{
+                     .prop = testInt32VecProp(1),
+                     .areaConfigs =
+                             {
+                                     {.areaId = 0,
+                                      .hasSupportedValueInfo =
+                                              HasSupportedValueInfo{
+                                                      .hasSupportedValuesList = false,
+                                              }},
+                             },
+             },
+             // This is an invalid request since hasSupportedValueInfo is null. This is not
+             // supported.
+             VehiclePropConfig{
+                     .prop = testInt32VecWindowProp(2),
+                     .areaConfigs =
+                             {
+                                     {
+                                             .areaId = 2,
+                                     },
+                             },
+             },
+             // This is an invalid request for global property.
+             VehiclePropConfig{
+                     .prop = testInt32VecProp(3),
+             },
+             // This is a normal request.
+             VehiclePropConfig{
+                     .prop = testInt32VecWindowProp(4),
+                     .areaConfigs =
+                             {
+                                     {.areaId = 4,
+                                      .hasSupportedValueInfo =
+                                              HasSupportedValueInfo{
+                                                      .hasSupportedValuesList = true,
+                                              }},
+                             },
+             }});
+
+    auto hardware = std::make_unique<MockVehicleHardware>();
+    MockVehicleHardware* hardwarePtr = hardware.get();
+    hardware->setPropertyConfigs(testConfigs);
+
+    SupportedValuesListResult resultFromHardware = {
+            .status = StatusCode::OK,
+            .supportedValuesList =
+                    std::vector<std::optional<RawPropValues>>{RawPropValues{.int32Values = {1}}}};
+    auto response = std::vector<SupportedValuesListResult>({resultFromHardware});
+    hardware->setSupportedValuesListResponse(response);
+
+    auto vhal = ndk::SharedRefBase::make<DefaultVehicleHal>(std::move(hardware));
+    std::shared_ptr<IVehicle> client = IVehicle::fromBinder(vhal->asBinder());
+
+    SupportedValuesListResults results;
+
+    auto propIdAreaId1 = VhalPropIdAreaId{.propId = testInt32VecProp(1), .areaId = 0};
+    auto propIdAreaId2 = VhalPropIdAreaId{.propId = testInt32VecWindowProp(2), .areaId = 2};
+    auto propIdAreaId3 = VhalPropIdAreaId{.propId = testInt32VecWindowProp(3), .areaId = 0};
+    auto propIdAreaId4 = VhalPropIdAreaId{.propId = testInt32VecWindowProp(4), .areaId = 4};
+    auto status = vhal->getSupportedValuesLists(
+            std::vector<VhalPropIdAreaId>{propIdAreaId1, propIdAreaId2, propIdAreaId3,
+                                          propIdAreaId4},
+            &results);
+
+    ASSERT_TRUE(status.isOk()) << "Get non-okay status from getSupportedValuesLists"
+                               << status.getMessage();
+    ASSERT_THAT(hardwarePtr->getSupportedValuesListRequest(),
+                ElementsAre(PropIdAreaId{.propId = testInt32VecWindowProp(4), .areaId = 4}))
+            << "Only valid request 4 should get to hardware";
+
+    ASSERT_EQ(results.payloads.size(), 4u);
+    SupportedValuesListResult result = results.payloads[0];
+    ASSERT_EQ(result.status, StatusCode::OK)
+            << "Must return OK even if the supported values list is not specified";
+    ASSERT_FALSE(result.supportedValuesList.has_value())
+            << "Must return an empty supported values list if not specified";
+
+    result = results.payloads[1];
+    ASSERT_EQ(result.status, StatusCode::INVALID_ARG)
+            << "PropId, areaId that set hasSupportedValueInfo to null must not be supported";
+    ASSERT_FALSE(result.supportedValuesList.has_value());
+
+    result = results.payloads[2];
+    ASSERT_EQ(result.status, StatusCode::INVALID_ARG)
+            << "Must return INVALID_ARG for global property without area config";
+    ASSERT_FALSE(result.supportedValuesList.has_value());
+
+    result = results.payloads[3];
+    ASSERT_EQ(result.status, StatusCode::OK);
+    ASSERT_TRUE(result.supportedValuesList.has_value());
+    ASSERT_EQ(result.supportedValuesList.value().size(), 1u);
+    ASSERT_EQ(result.supportedValuesList.value()[0]->int32Values.size(), 1u);
+    ASSERT_EQ((result.supportedValuesList.value())[0]->int32Values[0], 1);
+}
+
+TEST_F(DefaultVehicleHalTest, testGetSupportedValuesLists_propIdAreaIdNotFound) {
+    auto testConfigs = std::vector<VehiclePropConfig>({
+            VehiclePropConfig{
+                    .prop = testInt32VecWindowProp(1),
+                    .areaConfigs =
+                            {
+                                    {.areaId = 1,
+                                     .hasSupportedValueInfo =
+                                             HasSupportedValueInfo{
+                                                     .hasSupportedValuesList = true,
+                                             }},
+                            },
+            },
+    });
+
+    auto hardware = std::make_unique<MockVehicleHardware>();
+    hardware->setPropertyConfigs(testConfigs);
+
+    auto vhal = ndk::SharedRefBase::make<DefaultVehicleHal>(std::move(hardware));
+    std::shared_ptr<IVehicle> client = IVehicle::fromBinder(vhal->asBinder());
+
+    SupportedValuesListResults results;
+
+    // propId not valid.
+    auto propIdAreaId1 = VhalPropIdAreaId{.propId = testInt32VecWindowProp(2), .areaId = 1};
+    // areaId not valid.
+    auto propIdAreaId2 = VhalPropIdAreaId{.propId = testInt32VecWindowProp(1), .areaId = 2};
+
+    auto status = vhal->getSupportedValuesLists(
+            std::vector<VhalPropIdAreaId>{propIdAreaId1, propIdAreaId2}, &results);
+
+    ASSERT_TRUE(status.isOk()) << "Get non-okay status from getSupportedValuesLists"
+                               << status.getMessage();
+    ASSERT_EQ(results.payloads.size(), 2u);
+    SupportedValuesListResult result = results.payloads[0];
+    ASSERT_EQ(result.status, StatusCode::INVALID_ARG);
+    result = results.payloads[1];
+    ASSERT_EQ(result.status, StatusCode::INVALID_ARG);
+}
+
+TEST_F(DefaultVehicleHalTest, testGetMinMaxSupportedValue) {
+    auto testConfigs = std::vector<VehiclePropConfig>(
+            {// This ia valid request, but no supported values are specified.
+             VehiclePropConfig{
+                     .prop = testInt32VecProp(1),
+                     .areaConfigs =
+                             {
+                                     {.areaId = 0,
+                                      .hasSupportedValueInfo =
+                                              HasSupportedValueInfo{
+                                                      .hasMinSupportedValue = false,
+                                                      .hasMaxSupportedValue = false,
+                                              }},
+                             },
+             },
+             // This is an invalid request since hasSupportedValueInfo is null. This is not
+             // supported.
+             VehiclePropConfig{
+                     .prop = testInt32VecWindowProp(2),
+                     .areaConfigs =
+                             {
+                                     {
+                                             .areaId = 2,
+                                     },
+                             },
+             },
+             // This is an invalid request for global property.
+             VehiclePropConfig{
+                     .prop = testInt32VecProp(3),
+             },
+             // This is a normal request.
+             VehiclePropConfig{
+                     .prop = testInt32VecWindowProp(4),
+                     .areaConfigs =
+                             {
+                                     {.areaId = 4,
+                                      .hasSupportedValueInfo =
+                                              HasSupportedValueInfo{
+                                                      .hasMinSupportedValue = true,
+                                                      .hasMaxSupportedValue = false,
+                                              }},
+                             },
+             }});
+
+    auto hardware = std::make_unique<MockVehicleHardware>();
+    MockVehicleHardware* hardwarePtr = hardware.get();
+    hardware->setPropertyConfigs(testConfigs);
+
+    MinMaxSupportedValueResult resultFromHardware = {
+            .status = StatusCode::OK,
+            .minSupportedValue = std::optional<RawPropValues>{RawPropValues{.int32Values = {1}}},
+            .maxSupportedValue = std::nullopt,
+    };
+    auto response = std::vector<MinMaxSupportedValueResult>({resultFromHardware});
+    hardware->setMinMaxSupportedValueResponse(response);
+
+    auto vhal = ndk::SharedRefBase::make<DefaultVehicleHal>(std::move(hardware));
+    std::shared_ptr<IVehicle> client = IVehicle::fromBinder(vhal->asBinder());
+
+    MinMaxSupportedValueResults results;
+
+    auto propIdAreaId1 = VhalPropIdAreaId{.propId = testInt32VecProp(1), .areaId = 0};
+    auto propIdAreaId2 = VhalPropIdAreaId{.propId = testInt32VecWindowProp(2), .areaId = 2};
+    auto propIdAreaId3 = VhalPropIdAreaId{.propId = testInt32VecWindowProp(3), .areaId = 0};
+    auto propIdAreaId4 = VhalPropIdAreaId{.propId = testInt32VecWindowProp(4), .areaId = 4};
+    auto status = vhal->getMinMaxSupportedValue(
+            std::vector<VhalPropIdAreaId>{propIdAreaId1, propIdAreaId2, propIdAreaId3,
+                                          propIdAreaId4},
+            &results);
+
+    ASSERT_TRUE(status.isOk()) << "Get non-okay status from getMinMaxSupportedValue"
+                               << status.getMessage();
+    ASSERT_THAT(hardwarePtr->getMinMaxSupportedValueRequest(),
+                ElementsAre(PropIdAreaId{.propId = testInt32VecWindowProp(4), .areaId = 4}))
+            << "Only valid request 4 should get to hardware";
+
+    ASSERT_EQ(results.payloads.size(), 4u);
+    MinMaxSupportedValueResult result = results.payloads[0];
+    ASSERT_EQ(result.status, StatusCode::OK)
+            << "Must return OK even if the min/max supported values are not specified";
+    ASSERT_FALSE(result.minSupportedValue.has_value())
+            << "Must return null min supported value if not specified";
+    ASSERT_FALSE(result.maxSupportedValue.has_value())
+            << "Must return null max supported value if not specified";
+
+    result = results.payloads[1];
+    ASSERT_EQ(result.status, StatusCode::INVALID_ARG)
+            << "PropId, areaId that set hasSupportedValueInfo to null must not be supported";
+    ASSERT_FALSE(result.minSupportedValue.has_value());
+    ASSERT_FALSE(result.maxSupportedValue.has_value());
+
+    result = results.payloads[2];
+    ASSERT_EQ(result.status, StatusCode::INVALID_ARG)
+            << "Must return INVALID_ARG for global property without area config";
+    ASSERT_FALSE(result.minSupportedValue.has_value());
+    ASSERT_FALSE(result.maxSupportedValue.has_value());
+
+    result = results.payloads[3];
+    ASSERT_EQ(result.status, StatusCode::OK);
+    ASSERT_TRUE(result.minSupportedValue.has_value());
+    ASSERT_EQ(result.minSupportedValue->int32Values.size(), 1u);
+    ASSERT_EQ(result.minSupportedValue->int32Values[0], 1);
+    ASSERT_FALSE(result.maxSupportedValue.has_value());
+}
+
+TEST_F(DefaultVehicleHalTest, testGetMinMaxSupportedValue_propIdAreaIdNotFound) {
+    auto testConfigs = std::vector<VehiclePropConfig>({
+            VehiclePropConfig{
+                    .prop = testInt32VecWindowProp(1),
+                    .areaConfigs =
+                            {
+                                    {.areaId = 1,
+                                     .hasSupportedValueInfo =
+                                             HasSupportedValueInfo{
+                                                     .hasMinSupportedValue = true,
+                                                     .hasMaxSupportedValue = true,
+                                             }},
+                            },
+            },
+    });
+
+    auto hardware = std::make_unique<MockVehicleHardware>();
+    hardware->setPropertyConfigs(testConfigs);
+
+    auto vhal = ndk::SharedRefBase::make<DefaultVehicleHal>(std::move(hardware));
+    std::shared_ptr<IVehicle> client = IVehicle::fromBinder(vhal->asBinder());
+
+    MinMaxSupportedValueResults results;
+
+    // propId not valid.
+    auto propIdAreaId1 = VhalPropIdAreaId{.propId = testInt32VecWindowProp(2), .areaId = 1};
+    // areaId not valid.
+    auto propIdAreaId2 = VhalPropIdAreaId{.propId = testInt32VecWindowProp(1), .areaId = 2};
+
+    auto status = vhal->getMinMaxSupportedValue(
+            std::vector<VhalPropIdAreaId>{propIdAreaId1, propIdAreaId2}, &results);
+
+    ASSERT_TRUE(status.isOk()) << "Get non-okay status from getMinMaxSupportedValue"
+                               << status.getMessage();
+    ASSERT_EQ(results.payloads.size(), 2u);
+    MinMaxSupportedValueResult result = results.payloads[0];
+    ASSERT_EQ(result.status, StatusCode::INVALID_ARG);
+    result = results.payloads[1];
+    ASSERT_EQ(result.status, StatusCode::INVALID_ARG);
+}
+
+TEST_F(DefaultVehicleHalTest, testRegisterSupportedValueChangeCallback) {
+    auto testConfigs = std::vector<VehiclePropConfig>(
+            {VehiclePropConfig{
+                     .prop = testInt32VecProp(1),
+                     .areaConfigs =
+                             {
+                                     {.areaId = 0,
+                                      .hasSupportedValueInfo =
+                                              HasSupportedValueInfo{
+                                                      .hasMinSupportedValue = false,
+                                                      .hasMaxSupportedValue = false,
+                                                      .hasSupportedValuesList = false,
+                                              }},
+                             },
+             },
+             VehiclePropConfig{
+                     .prop = testInt32VecWindowProp(2),
+                     .areaConfigs =
+                             {
+                                     {.areaId = 2,
+                                      .hasSupportedValueInfo =
+                                              HasSupportedValueInfo{
+                                                      .hasMinSupportedValue = true,
+                                                      .hasMaxSupportedValue = false,
+                                                      .hasSupportedValuesList = false,
+                                              }},
+                             },
+             }});
+
+    auto hardware = std::make_unique<MockVehicleHardware>();
+    MockVehicleHardware* hardwarePtr = hardware.get();
+    hardware->setPropertyConfigs(testConfigs);
+
+    auto vhal = ndk::SharedRefBase::make<DefaultVehicleHal>(std::move(hardware));
+    std::shared_ptr<IVehicle> client = IVehicle::fromBinder(vhal->asBinder());
+
+    // This request is ignored because it does not have supported value info.
+    auto propIdAreaId1 = VhalPropIdAreaId{.propId = testInt32VecProp(1), .areaId = 0};
+    auto propIdAreaId2 = VhalPropIdAreaId{.propId = testInt32VecWindowProp(2), .areaId = 2};
+    auto status = client->registerSupportedValueChangeCallback(
+            getCallbackClient(), std::vector<VhalPropIdAreaId>{propIdAreaId1, propIdAreaId2});
+
+    ASSERT_TRUE(status.isOk()) << "Get non-okay status from registerSupportedValueChangeCallback"
+                               << status.getMessage();
+    ASSERT_THAT(hardwarePtr->getSubscribedSupportedValueChangePropIdAreaIds(),
+                ElementsAre(PropIdAreaId{.propId = testInt32VecWindowProp(2), .areaId = 2}));
+}
+
+TEST_F(DefaultVehicleHalTest, testRegisterSupportedValueChangeCallback_invalidRequest) {
+    auto testConfigs = std::vector<VehiclePropConfig>({VehiclePropConfig{
+            .prop = testInt32VecProp(1),
+            .areaConfigs =
+                    {
+                            {.areaId = 0, .hasSupportedValueInfo = std::nullopt},
+                    },
+    }});
+    auto hardware = std::make_unique<MockVehicleHardware>();
+    hardware->setPropertyConfigs(testConfigs);
+
+    auto vhal = ndk::SharedRefBase::make<DefaultVehicleHal>(std::move(hardware));
+    std::shared_ptr<IVehicle> client = IVehicle::fromBinder(vhal->asBinder());
+
+    auto propIdAreaId1 = VhalPropIdAreaId{.propId = testInt32VecProp(1), .areaId = 0};
+    auto status = client->registerSupportedValueChangeCallback(
+            getCallbackClient(), std::vector<VhalPropIdAreaId>{propIdAreaId1});
+
+    ASSERT_FALSE(status.isOk()) << "registerSupportedValueChangeCallback must return error if one "
+                                   "of the requested [propId, areaId]"
+                                   " does not have supportedValueInfo";
+}
+
+TEST_F(DefaultVehicleHalTest, testRegisterSupportedValueChangeCallback_errorStatusFromHardware) {
+    auto testConfigs = std::vector<VehiclePropConfig>({VehiclePropConfig{
+            .prop = testInt32VecWindowProp(2),
+            .areaConfigs =
+                    {
+                            {.areaId = 2,
+                             .hasSupportedValueInfo =
+                                     HasSupportedValueInfo{
+                                             .hasMinSupportedValue = true,
+                                             .hasMaxSupportedValue = false,
+                                             .hasSupportedValuesList = false,
+                                     }},
+                    },
+    }});
+
+    auto hardware = std::make_unique<MockVehicleHardware>();
+    hardware->setStatus("subscribeSupportedValueChange", StatusCode::INTERNAL_ERROR);
+    hardware->setPropertyConfigs(testConfigs);
+
+    auto vhal = ndk::SharedRefBase::make<DefaultVehicleHal>(std::move(hardware));
+    std::shared_ptr<IVehicle> client = IVehicle::fromBinder(vhal->asBinder());
+
+    auto propIdAreaId = VhalPropIdAreaId{.propId = testInt32VecWindowProp(2), .areaId = 2};
+    auto status = client->registerSupportedValueChangeCallback(
+            getCallbackClient(), std::vector<VhalPropIdAreaId>{propIdAreaId});
+
+    ASSERT_FALSE(status.isOk()) << "registerSupportedValueChangeCallback must return error if "
+                                   "VehicleHardware returns error";
+}
+
+TEST_F(DefaultVehicleHalTest, testUnregisterSupportedValueChangeCallback) {
+    auto testConfigs = std::vector<VehiclePropConfig>(
+            {VehiclePropConfig{
+                     .prop = testInt32VecProp(1),
+                     .areaConfigs =
+                             {
+                                     {.areaId = 0,
+                                      .hasSupportedValueInfo =
+                                              HasSupportedValueInfo{
+                                                      .hasMinSupportedValue = false,
+                                                      .hasMaxSupportedValue = false,
+                                                      .hasSupportedValuesList = true,
+                                              }},
+                             },
+             },
+             VehiclePropConfig{
+                     .prop = testInt32VecWindowProp(2),
+                     .areaConfigs =
+                             {
+                                     {.areaId = 2,
+                                      .hasSupportedValueInfo =
+                                              HasSupportedValueInfo{
+                                                      .hasMinSupportedValue = true,
+                                                      .hasMaxSupportedValue = false,
+                                                      .hasSupportedValuesList = false,
+                                              }},
+                             },
+             }});
+
+    auto hardware = std::make_unique<MockVehicleHardware>();
+    MockVehicleHardware* hardwarePtr = hardware.get();
+    hardware->setPropertyConfigs(testConfigs);
+
+    auto vhal = ndk::SharedRefBase::make<DefaultVehicleHal>(std::move(hardware));
+    std::shared_ptr<IVehicle> client = IVehicle::fromBinder(vhal->asBinder());
+
+    auto propIdAreaId1 = VhalPropIdAreaId{.propId = testInt32VecProp(1), .areaId = 0};
+    auto propIdAreaId2 = VhalPropIdAreaId{.propId = testInt32VecWindowProp(2), .areaId = 2};
+    auto status = client->registerSupportedValueChangeCallback(
+            getCallbackClient(), std::vector<VhalPropIdAreaId>{propIdAreaId1, propIdAreaId2});
+
+    ASSERT_TRUE(status.isOk()) << "Get non-okay status from registerSupportedValueChangeCallback"
+                               << status.getMessage();
+
+    status = client->unregisterSupportedValueChangeCallback(
+            getCallbackClient(), std::vector<VhalPropIdAreaId>{propIdAreaId1, propIdAreaId2});
+
+    ASSERT_TRUE(status.isOk()) << "Get non-okay status from unregisterSupportedValueChangeCallback"
+                               << status.getMessage();
+
+    ASSERT_TRUE(hardwarePtr->getSubscribedSupportedValueChangePropIdAreaIds().empty())
+            << "All registered [propId, areaId]s must be unregistered";
+}
+
+TEST_F(DefaultVehicleHalTest, testUnregisterSupportedValueChangeCallback_ignoreUnregistered) {
+    auto testConfigs = std::vector<VehiclePropConfig>(
+            {VehiclePropConfig{
+                     .prop = testInt32VecProp(1),
+                     .areaConfigs =
+                             {
+                                     {.areaId = 0,
+                                      .hasSupportedValueInfo =
+                                              HasSupportedValueInfo{
+                                                      .hasMinSupportedValue = false,
+                                                      .hasMaxSupportedValue = false,
+                                                      .hasSupportedValuesList = true,
+                                              }},
+                             },
+             },
+             VehiclePropConfig{
+                     .prop = testInt32VecWindowProp(2),
+                     .areaConfigs =
+                             {
+                                     {.areaId = 2,
+                                      .hasSupportedValueInfo =
+                                              HasSupportedValueInfo{
+                                                      .hasMinSupportedValue = true,
+                                                      .hasMaxSupportedValue = false,
+                                                      .hasSupportedValuesList = false,
+                                              }},
+                             },
+             }});
+
+    auto hardware = std::make_unique<MockVehicleHardware>();
+    MockVehicleHardware* hardwarePtr = hardware.get();
+    hardware->setPropertyConfigs(testConfigs);
+
+    auto vhal = ndk::SharedRefBase::make<DefaultVehicleHal>(std::move(hardware));
+    std::shared_ptr<IVehicle> client = IVehicle::fromBinder(vhal->asBinder());
+
+    auto propIdAreaId1 = VhalPropIdAreaId{.propId = testInt32VecProp(1), .areaId = 0};
+    auto propIdAreaId2 = VhalPropIdAreaId{.propId = testInt32VecWindowProp(2), .areaId = 2};
+    auto status = client->unregisterSupportedValueChangeCallback(
+            getCallbackClient(), std::vector<VhalPropIdAreaId>{propIdAreaId1, propIdAreaId2});
+
+    ASSERT_TRUE(status.isOk());
+}
+
 }  // namespace vehicle
 }  // namespace automotive
 }  // namespace hardware
diff --git a/automotive/vehicle/aidl/impl/current/vhal/test/MockVehicleHardware.cpp b/automotive/vehicle/aidl/impl/current/vhal/test/MockVehicleHardware.cpp
index e796ce5..11f1835 100644
--- a/automotive/vehicle/aidl/impl/current/vhal/test/MockVehicleHardware.cpp
+++ b/automotive/vehicle/aidl/impl/current/vhal/test/MockVehicleHardware.cpp
@@ -26,10 +26,12 @@
 
 using ::aidl::android::hardware::automotive::vehicle::GetValueRequest;
 using ::aidl::android::hardware::automotive::vehicle::GetValueResult;
+using ::aidl::android::hardware::automotive::vehicle::MinMaxSupportedValueResult;
 using ::aidl::android::hardware::automotive::vehicle::SetValueRequest;
 using ::aidl::android::hardware::automotive::vehicle::SetValueResult;
 using ::aidl::android::hardware::automotive::vehicle::StatusCode;
 using ::aidl::android::hardware::automotive::vehicle::SubscribeOptions;
+using ::aidl::android::hardware::automotive::vehicle::SupportedValuesListResult;
 using ::aidl::android::hardware::automotive::vehicle::VehiclePropConfig;
 using ::aidl::android::hardware::automotive::vehicle::VehiclePropValue;
 
@@ -200,6 +202,20 @@
     return propIdAreaIds;
 }
 
+std::vector<SupportedValuesListResult> MockVehicleHardware::getSupportedValuesLists(
+        const std::vector<PropIdAreaId>& propIdAreaIds) {
+    std::scoped_lock<std::mutex> lockGuard(mLock);
+    mSupportedValuesListRequest = propIdAreaIds;
+    return mSupportedValuesListResponse;
+}
+
+std::vector<MinMaxSupportedValueResult> MockVehicleHardware::getMinMaxSupportedValues(
+        const std::vector<PropIdAreaId>& propIdAreaIds) {
+    std::scoped_lock<std::mutex> lockGuard(mLock);
+    mMinMaxSupportedValueRequest = propIdAreaIds;
+    return mMinMaxSupportedValueResponse;
+}
+
 void MockVehicleHardware::registerOnPropertyChangeEvent(
         std::unique_ptr<const PropertyChangeCallback> callback) {
     std::scoped_lock<std::mutex> lockGuard(mLock);
@@ -267,11 +283,67 @@
     mEventBatchingWindow = window;
 }
 
+void MockVehicleHardware::setSupportedValuesListResponse(
+        const std::vector<SupportedValuesListResult>& response) {
+    std::scoped_lock<std::mutex> lockGuard(mLock);
+    mSupportedValuesListResponse = response;
+}
+
+void MockVehicleHardware::setMinMaxSupportedValueResponse(
+        const std::vector<MinMaxSupportedValueResult>& response) {
+    std::scoped_lock<std::mutex> lockGuard(mLock);
+    mMinMaxSupportedValueResponse = response;
+}
+
+std::vector<PropIdAreaId> MockVehicleHardware::getSupportedValuesListRequest() {
+    std::scoped_lock<std::mutex> lockGuard(mLock);
+    return mSupportedValuesListRequest;
+}
+
+std::vector<PropIdAreaId> MockVehicleHardware::getMinMaxSupportedValueRequest() {
+    std::scoped_lock<std::mutex> lockGuard(mLock);
+    return mMinMaxSupportedValueRequest;
+}
+
 std::chrono::nanoseconds MockVehicleHardware::getPropertyOnChangeEventBatchingWindow() {
     std::scoped_lock<std::mutex> lockGuard(mLock);
     return mEventBatchingWindow;
 }
 
+StatusCode MockVehicleHardware::subscribeSupportedValueChange(
+        const std::vector<PropIdAreaId>& propIdAreaIds) {
+    std::scoped_lock<std::mutex> lockGuard(mLock);
+    if (auto it = mStatusByFunctions.find(__func__); it != mStatusByFunctions.end()) {
+        if (StatusCode status = it->second; status != StatusCode::OK) {
+            return status;
+        }
+    }
+    for (const auto& propIdAreaId : propIdAreaIds) {
+        mSubscribedSupportedValueChangePropIdAreaIds.insert(propIdAreaId);
+    }
+    return StatusCode::OK;
+}
+
+StatusCode MockVehicleHardware::unsubscribeSupportedValueChange(
+        const std::vector<PropIdAreaId>& propIdAreaIds) {
+    std::scoped_lock<std::mutex> lockGuard(mLock);
+    if (auto it = mStatusByFunctions.find(__func__); it != mStatusByFunctions.end()) {
+        if (StatusCode status = it->second; status != StatusCode::OK) {
+            return status;
+        }
+    }
+    for (const auto& propIdAreaId : propIdAreaIds) {
+        mSubscribedSupportedValueChangePropIdAreaIds.erase(propIdAreaId);
+    }
+    return StatusCode::OK;
+}
+
+std::unordered_set<PropIdAreaId, PropIdAreaIdHash>
+MockVehicleHardware::getSubscribedSupportedValueChangePropIdAreaIds() {
+    std::scoped_lock<std::mutex> lockGuard(mLock);
+    return mSubscribedSupportedValueChangePropIdAreaIds;
+}
+
 template <class ResultType>
 StatusCode MockVehicleHardware::returnResponse(
         std::shared_ptr<const std::function<void(std::vector<ResultType>)>> callback,
diff --git a/automotive/vehicle/aidl/impl/current/vhal/test/MockVehicleHardware.h b/automotive/vehicle/aidl/impl/current/vhal/test/MockVehicleHardware.h
index 06e01a8..e7359db 100644
--- a/automotive/vehicle/aidl/impl/current/vhal/test/MockVehicleHardware.h
+++ b/automotive/vehicle/aidl/impl/current/vhal/test/MockVehicleHardware.h
@@ -67,6 +67,14 @@
     aidl::android::hardware::automotive::vehicle::StatusCode unsubscribe(int32_t propId,
                                                                          int32_t areaId) override;
     std::chrono::nanoseconds getPropertyOnChangeEventBatchingWindow() override;
+    std::vector<aidl::android::hardware::automotive::vehicle::SupportedValuesListResult>
+    getSupportedValuesLists(const std::vector<PropIdAreaId>& propIdAreaIds) override;
+    std::vector<aidl::android::hardware::automotive::vehicle::MinMaxSupportedValueResult>
+    getMinMaxSupportedValues(const std::vector<PropIdAreaId>& propIdAreaIds) override;
+    aidl::android::hardware::automotive::vehicle::StatusCode subscribeSupportedValueChange(
+            const std::vector<PropIdAreaId>& propIdAreaIds) override;
+    aidl::android::hardware::automotive::vehicle::StatusCode unsubscribeSupportedValueChange(
+            const std::vector<PropIdAreaId>& propIdAreaIds) override;
 
     // Test functions.
     void setPropertyConfigs(
@@ -78,6 +86,14 @@
     void addSetValueResponses(
             const std::vector<aidl::android::hardware::automotive::vehicle::SetValueResult>&
                     responses);
+    void setSupportedValuesListResponse(
+            const std::vector<
+                    aidl::android::hardware::automotive::vehicle::SupportedValuesListResult>&
+                    response);
+    void setMinMaxSupportedValueResponse(
+            const std::vector<
+                    aidl::android::hardware::automotive::vehicle::MinMaxSupportedValueResult>&
+                    response);
     void setGetValueResponder(
             std::function<aidl::android::hardware::automotive::vehicle::StatusCode(
                     std::shared_ptr<const GetValuesCallback>,
@@ -88,6 +104,8 @@
     nextGetValueRequests();
     std::vector<aidl::android::hardware::automotive::vehicle::SetValueRequest>
     nextSetValueRequests();
+    std::vector<PropIdAreaId> getSupportedValuesListRequest();
+    std::vector<PropIdAreaId> getMinMaxSupportedValueRequest();
     void setStatus(const char* functionName,
                    aidl::android::hardware::automotive::vehicle::StatusCode status);
     void setSleepTime(int64_t timeInNano);
@@ -100,10 +118,13 @@
     std::vector<aidl::android::hardware::automotive::vehicle::SubscribeOptions>
     getSubscribeOptions();
     void clearSubscribeOptions();
-    // Whether getAllPropertyConfigs() has been called, which blocks all all property configs
+    // Whether getAllPropertyConfigs() has been called, which blocks on all property configs
     // being ready.
     bool getAllPropertyConfigsCalled();
 
+    std::unordered_set<PropIdAreaId, PropIdAreaIdHash>
+    getSubscribedSupportedValueChangePropIdAreaIds();
+
   private:
     mutable std::mutex mLock;
     mutable std::condition_variable mCv;
@@ -118,6 +139,12 @@
             mSetValueRequests GUARDED_BY(mLock);
     mutable std::list<std::vector<aidl::android::hardware::automotive::vehicle::SetValueResult>>
             mSetValueResponses GUARDED_BY(mLock);
+    mutable std::vector<PropIdAreaId> mSupportedValuesListRequest GUARDED_BY(mLock);
+    mutable std::vector<PropIdAreaId> mMinMaxSupportedValueRequest GUARDED_BY(mLock);
+    mutable std::vector<aidl::android::hardware::automotive::vehicle::SupportedValuesListResult>
+            mSupportedValuesListResponse GUARDED_BY(mLock);
+    mutable std::vector<aidl::android::hardware::automotive::vehicle::MinMaxSupportedValueResult>
+            mMinMaxSupportedValueResponse GUARDED_BY(mLock);
     std::unordered_map<const char*, aidl::android::hardware::automotive::vehicle::StatusCode>
             mStatusByFunctions GUARDED_BY(mLock);
     int64_t mSleepTime GUARDED_BY(mLock) = 0;
@@ -154,6 +181,9 @@
     std::shared_ptr<RecurrentTimer> mRecurrentTimer;
     std::unordered_map<int32_t, std::unordered_map<int32_t, std::shared_ptr<std::function<void()>>>>
             mRecurrentActions GUARDED_BY(mLock);
+
+    std::unordered_set<PropIdAreaId, PropIdAreaIdHash> mSubscribedSupportedValueChangePropIdAreaIds
+            GUARDED_BY(mLock);
 };
 
 }  // namespace vehicle
diff --git a/automotive/vehicle/aidl/impl/current/vhal/test/SubscriptionManagerTest.cpp b/automotive/vehicle/aidl/impl/current/vhal/test/SubscriptionManagerTest.cpp
index 5d58de5..2ac3a73 100644
--- a/automotive/vehicle/aidl/impl/current/vhal/test/SubscriptionManagerTest.cpp
+++ b/automotive/vehicle/aidl/impl/current/vhal/test/SubscriptionManagerTest.cpp
@@ -351,6 +351,10 @@
                                        std::vector<int32_t>({0, 1, 2}));
     ASSERT_TRUE(result.ok()) << "unsubscribe an unsubscribed property must do nothing";
 
+    result = getManager()->unsubscribe(getCallbackClient()->asBinder().get(),
+                                       std::vector<int32_t>({0, 1, 2}));
+    ASSERT_TRUE(result.ok()) << "retry an unsubscribe operation must not throw error";
+
     std::vector<VehiclePropValue> updatedValues = {
             {
                     .prop = 0,
diff --git a/automotive/vehicle/aidl_property/android/hardware/automotive/vehicle/VehicleProperty.aidl b/automotive/vehicle/aidl_property/android/hardware/automotive/vehicle/VehicleProperty.aidl
index f8cce1a..797be73 100644
--- a/automotive/vehicle/aidl_property/android/hardware/automotive/vehicle/VehicleProperty.aidl
+++ b/automotive/vehicle/aidl_property/android/hardware/automotive/vehicle/VehicleProperty.aidl
@@ -1234,6 +1234,22 @@
      * The minInt32Value indicates the lowest fan speed.
      * The maxInt32Value indicates the highest fan speed.
      *
+     * If {@code HasSupportedValueInfo} for a specific area ID is not {@code null}:
+     *
+     * {@code HasSupportedValueInfo.hasMinSupportedValue} and
+     * {@code HasSupportedValueInfo.hasMaxSupportedValue} must be {@code true} for the specific
+     * area ID.
+     *
+     * {@code MinMaxSupportedValueResult.minSupportedValue} indicates the lowest fan speed.
+     *
+     * {@code MinMaxSupportedValueResult.maxSupportedValue} indicates the highest fan speed.
+     *
+     * All integers between minSupportedValue and maxSupportedValue must be supported.
+     *
+     * At boot, minInt32Value is equal to minSupportedValue, maxInt32Value is equal to
+     * maxSupportedValue.
+     *
+     *
      * This property is not in any particular unit but in a specified range of relative speeds.
      *
      * This property is defined as VehiclePropertyAccess.READ_WRITE, but OEMs have the option to
@@ -1242,6 +1258,7 @@
      * @change_mode VehiclePropertyChangeMode.ON_CHANGE
      * @access VehiclePropertyAccess.READ_WRITE
      * @access VehiclePropertyAccess.READ
+     * @require_min_max_supported_value
      * @version 2
      */
     HVAC_FAN_SPEED = 0x0500 + 0x10000000 + 0x05000000
diff --git a/bluetooth/OWNERS b/bluetooth/OWNERS
index f401b8c..df250c8 100644
--- a/bluetooth/OWNERS
+++ b/bluetooth/OWNERS
@@ -1,5 +1,5 @@
 # Bug component: 27441
 
+asoulier@google.com
 henrichataing@google.com
-mylesgw@google.com
 siyuanh@google.com
diff --git a/boot/aidl/default/Android.bp b/boot/aidl/default/Android.bp
index c1d3c57..2fd2dad 100644
--- a/boot/aidl/default/Android.bp
+++ b/boot/aidl/default/Android.bp
@@ -57,7 +57,7 @@
     name: "android.hardware.boot-service.default_recovery",
     defaults: ["android.hardware.boot-service_common"],
     init_rc: ["android.hardware.boot-service.default_recovery.rc"],
-    vintf_fragments: ["android.hardware.boot-service.default.xml"],
+    vintf_fragment_modules: ["android.hardware.boot-service.default.xml.recovery"],
     recovery: true,
 
     shared_libs: [
@@ -77,11 +77,16 @@
     installable: false,
 }
 
-prebuilt_etc {
+vintf_fragment {
+    name: "android.hardware.boot-service.default.xml.recovery",
+    src: "android.hardware.boot-service.default.xml",
+    recovery: true,
+}
+
+vintf_fragment {
     name: "android.hardware.boot-service.default.xml",
     src: "android.hardware.boot-service.default.xml",
-    sub_dir: "vintf",
-    installable: false,
+    vendor: true,
 }
 
 apex {
@@ -98,6 +103,8 @@
     ],
     prebuilts: [
         "android.hardware.boot-service.default.rc",
+    ],
+    vintf_fragment_modules: [
         "android.hardware.boot-service.default.xml",
     ],
 }
diff --git a/broadcastradio/aidl/default/BroadcastRadio.cpp b/broadcastradio/aidl/default/BroadcastRadio.cpp
index 015cae0..f19a4e5 100644
--- a/broadcastradio/aidl/default/BroadcastRadio.cpp
+++ b/broadcastradio/aidl/default/BroadcastRadio.cpp
@@ -790,14 +790,12 @@
 ScopedAStatus BroadcastRadio::setParameters(
         [[maybe_unused]] const vector<VendorKeyValue>& parameters,
         vector<VendorKeyValue>* returnParameters) {
-    // TODO(b/243682330) Support vendor parameter functionality
     *returnParameters = {};
     return ScopedAStatus::ok();
 }
 
 ScopedAStatus BroadcastRadio::getParameters([[maybe_unused]] const vector<string>& keys,
                                             vector<VendorKeyValue>* returnParameters) {
-    // TODO(b/243682330) Support vendor parameter functionality
     *returnParameters = {};
     return ScopedAStatus::ok();
 }
diff --git a/contexthub/aidl/aidl_api/android.hardware.contexthub/current/android/hardware/contexthub/IContextHub.aidl b/contexthub/aidl/aidl_api/android.hardware.contexthub/current/android/hardware/contexthub/IContextHub.aidl
index 2646d15..2940745 100644
--- a/contexthub/aidl/aidl_api/android.hardware.contexthub/current/android/hardware/contexthub/IContextHub.aidl
+++ b/contexthub/aidl/aidl_api/android.hardware.contexthub/current/android/hardware/contexthub/IContextHub.aidl
@@ -51,14 +51,6 @@
   void sendMessageDeliveryStatusToHub(in int contextHubId, in android.hardware.contexthub.MessageDeliveryStatus messageDeliveryStatus);
   List<android.hardware.contexthub.HubInfo> getHubs();
   List<android.hardware.contexthub.EndpointInfo> getEndpoints();
-  void registerEndpoint(in android.hardware.contexthub.EndpointInfo endpoint);
-  void unregisterEndpoint(in android.hardware.contexthub.EndpointInfo endpoint);
-  void registerEndpointCallback(in android.hardware.contexthub.IEndpointCallback callback);
-  int[2] requestSessionIdRange(int size);
-  void openEndpointSession(int sessionId, in android.hardware.contexthub.EndpointId destination, in android.hardware.contexthub.EndpointId initiator, in @nullable String serviceDescriptor);
-  void sendMessageToEndpoint(int sessionId, in android.hardware.contexthub.Message msg);
-  void sendMessageDeliveryStatusToEndpoint(int sessionId, in android.hardware.contexthub.MessageDeliveryStatus msgStatus);
-  void closeEndpointSession(int sessionId, in android.hardware.contexthub.Reason reason);
-  void endpointSessionOpenComplete(int sessionId);
+  @PropagateAllowBlocking android.hardware.contexthub.IEndpointCommunication registerEndpointHub(in android.hardware.contexthub.IEndpointCallback callback, in android.hardware.contexthub.HubInfo hubInfo);
   const int EX_CONTEXT_HUB_UNSPECIFIED = (-1) /* -1 */;
 }
diff --git a/contexthub/aidl/aidl_api/android.hardware.contexthub/current/android/hardware/contexthub/IEndpointCommunication.aidl b/contexthub/aidl/aidl_api/android.hardware.contexthub/current/android/hardware/contexthub/IEndpointCommunication.aidl
new file mode 100644
index 0000000..8742415
--- /dev/null
+++ b/contexthub/aidl/aidl_api/android.hardware.contexthub/current/android/hardware/contexthub/IEndpointCommunication.aidl
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2024 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.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.hardware.contexthub;
+@VintfStability
+interface IEndpointCommunication {
+  void registerEndpoint(in android.hardware.contexthub.EndpointInfo endpoint);
+  void unregisterEndpoint(in android.hardware.contexthub.EndpointInfo endpoint);
+  int[2] requestSessionIdRange(int size);
+  void openEndpointSession(int sessionId, in android.hardware.contexthub.EndpointId destination, in android.hardware.contexthub.EndpointId initiator, in @nullable String serviceDescriptor);
+  void sendMessageToEndpoint(int sessionId, in android.hardware.contexthub.Message msg);
+  void sendMessageDeliveryStatusToEndpoint(int sessionId, in android.hardware.contexthub.MessageDeliveryStatus msgStatus);
+  void closeEndpointSession(int sessionId, in android.hardware.contexthub.Reason reason);
+  void endpointSessionOpenComplete(int sessionId);
+  void unregister();
+}
diff --git a/contexthub/aidl/android/hardware/contexthub/IContextHub.aidl b/contexthub/aidl/android/hardware/contexthub/IContextHub.aidl
index eb6d051..3fb452c 100644
--- a/contexthub/aidl/android/hardware/contexthub/IContextHub.aidl
+++ b/contexthub/aidl/android/hardware/contexthub/IContextHub.aidl
@@ -18,19 +18,16 @@
 
 import android.hardware.contexthub.ContextHubInfo;
 import android.hardware.contexthub.ContextHubMessage;
-import android.hardware.contexthub.EndpointId;
 import android.hardware.contexthub.EndpointInfo;
 import android.hardware.contexthub.HostEndpointInfo;
 import android.hardware.contexthub.HubInfo;
 import android.hardware.contexthub.IContextHubCallback;
 import android.hardware.contexthub.IEndpointCallback;
-import android.hardware.contexthub.Message;
+import android.hardware.contexthub.IEndpointCommunication;
 import android.hardware.contexthub.MessageDeliveryStatus;
 import android.hardware.contexthub.NanSessionStateUpdate;
 import android.hardware.contexthub.NanoappBinary;
 import android.hardware.contexthub.NanoappInfo;
-import android.hardware.contexthub.Reason;
-import android.hardware.contexthub.Service;
 import android.hardware.contexthub.Setting;
 
 @VintfStability
@@ -271,125 +268,22 @@
     List<EndpointInfo> getEndpoints();
 
     /**
-     * Publishes an endpoint from the calling side (e.g. Android). Endpoints must be registered
-     * prior to starting a session.
+     * Registers a new hub for endpoint communication which will receive events for its endpoints
+     * over the given callback. Returns an interface for the hub to register endpoints, start
+     * sessions, and send messages.
+     *
+     * It is valid for the same callback to be registered for multiple hubs, as the
+     * IEndpointCallback events provide sufficient information to determine which hub the event is
+     * intended for:
+     * * session ids are allocated to a specific hub and are unique
+     * * endpoints are identified by hub and endpoint id
+     *
+     * @param callback Interface to send endpoint events targeting the caller
+     * @param hubInfo Details of the hub being registered
+     * @return Interface for the hub to interact with other endpoint hubs
+     *
+     * @throws EX_ILLEGAL_STATE if hubInfo.hubId has already been registered
      */
-    void registerEndpoint(in EndpointInfo endpoint);
-
-    /**
-     * Teardown an endpoint from the calling side (e.g. Android). This endpoint must have already
-     * been published via registerEndpoint().
-     */
-    void unregisterEndpoint(in EndpointInfo endpoint);
-
-    /**
-     * Attaches a callback interface to receive events targeted at endpoints registered by the
-     * caller.
-     */
-    void registerEndpointCallback(in IEndpointCallback callback);
-
-    /**
-     * Request a range of session IDs for the caller to use when initiating sessions. This may be
-     * called more than once, but typical usage is to request a large enough range to accommodate
-     * the maximum expected number of concurrent sessions, but not overly large as to limit other
-     * clients.
-     *
-     * @param size The number of sessionId reserved for host-initiated sessions. This number should
-     *         be less than or equal to 1024.
-     *
-     * @return An array with two elements representing the smallest and largest possible session id
-     *         available for host.
-     *
-     * @throws EX_ILLEGAL_ARGUMENT if the size is invalid.
-     * @throws EX_SERVICE_SPECIFIC if the id range requested cannot be allocated.
-     */
-    int[2] requestSessionIdRange(int size);
-
-    /**
-     * Request to open a session for communication between an endpoint previously registered by the
-     * caller and a target endpoint found in getEndpoints(), optionally scoped to a service
-     * published by the target endpoint.
-     *
-     * Upon returning from this function, the session is in pending state, and the final result will
-     * be given by an asynchronous call to onEndpointSessionOpenComplete() on success, or
-     * onCloseEndpointSession() on failure.
-     *
-     * @param sessionId Caller-allocated session identifier, which must be unique across all active
-     *         sessions, and must fall in a range allocated via requestSessionIdRange().
-     * @param destination The EndpointId representing the destination side of the session.
-     * @param initiator The EndpointId representing the initiating side of the session, which
-     *         must've already been published through registerEndpoint().
-     * @param serviceDescriptor Descriptor for the service specification for scoping this session
-     *         (nullable). Null indicates a fully custom marshalling scheme. The value should match
-     *         a published descriptor for both destination and initiator.
-     *
-     * @throws EX_ILLEGAL_ARGUMENT if any of the arguments are invalid, or the combination of the
-     *         arguments is invalid.
-     * @throws EX_SERVICE_SPECIFIC on other errors
-     *         - EX_CONTEXT_HUB_UNSPECIFIED if the request failed for other reasons.
-     */
-    void openEndpointSession(int sessionId, in EndpointId destination, in EndpointId initiator,
-            in @nullable String serviceDescriptor);
-
-    /**
-     * Send a message from one endpoint to another on the (currently open) session.
-     *
-     * @param sessionId The integer representing the communication session, previously set in
-     *         openEndpointSession() or onEndpointSessionOpenRequest().
-     * @param msg The Message object representing a message to endpoint from the endpoint on host.
-     *
-     * @throws EX_ILLEGAL_ARGUMENT if any of the arguments are invalid, or the combination of the
-     *         arguments is invalid.
-     * @throws EX_SERVICE_SPECIFIC on other errors
-     *         - EX_CONTEXT_HUB_UNSPECIFIED if the request failed for other reasons.
-     */
-    void sendMessageToEndpoint(int sessionId, in Message msg);
-
-    /**
-     * Sends a message delivery status to the endpoint in response to receiving a Message with flag
-     * FLAG_REQUIRES_DELIVERY_STATUS. Each message with the flag should have a MessageDeliveryStatus
-     * response. This method sends the message delivery status back to the remote endpoint for a
-     * session.
-     *
-     * @param sessionId The integer representing the communication session, previously set in
-     *         openEndpointSession() or onEndpointSessionOpenRequest().
-     * @param msgStatus The MessageDeliveryStatus object representing the delivery status for a
-     *         specific message (identified by the sequenceNumber) within the session.
-     *
-     * @throws EX_UNSUPPORTED_OPERATION if ContextHubInfo.supportsReliableMessages is false for
-     *          the hub involved in this session.
-     */
-    void sendMessageDeliveryStatusToEndpoint(int sessionId, in MessageDeliveryStatus msgStatus);
-
-    /**
-     * Closes a session previously opened by openEndpointSession() or requested via
-     * onEndpointSessionOpenRequest(). Processing of session closure must be ordered/synchronized
-     * with message delivery, such that if this session was open, any messages previously passed to
-     * sendMessageToEndpoint() that are still in-flight must still be delivered before the session
-     * is closed. Any in-flight messages to the endpoint that requested to close the session will
-     * not be delivered.
-     *
-     * @param sessionId The integer representing the communication session, previously set in
-     *         openEndpointSession() or onEndpointSessionOpenRequest().
-     * @param reason The reason for this close endpoint session request.
-     *
-     * @throws EX_ILLEGAL_ARGUMENT if any of the arguments are invalid, or the combination of the
-     *         arguments is invalid.
-     * @throws EX_SERVICE_SPECIFIC on other errors
-     *         - EX_CONTEXT_HUB_UNSPECIFIED if the request failed for other reasons.
-     */
-    void closeEndpointSession(int sessionId, in Reason reason);
-
-    /**
-     * Notifies the HAL that the session requested by onEndpointSessionOpenRequest is ready to use.
-     *
-     * @param sessionId The integer representing the communication session, previously set in
-     *         onEndpointSessionOpenRequest(). This id is assigned by the HAL.
-     *
-     * @throws EX_ILLEGAL_ARGUMENT if any of the arguments are invalid, or the combination of the
-     *         arguments is invalid.
-     * @throws EX_SERVICE_SPECIFIC on other errors
-     *         - EX_CONTEXT_HUB_UNSPECIFIED if the request failed for other reasons.
-     */
-    void endpointSessionOpenComplete(int sessionId);
+    @PropagateAllowBlocking
+    IEndpointCommunication registerEndpointHub(in IEndpointCallback callback, in HubInfo hubInfo);
 }
diff --git a/contexthub/aidl/android/hardware/contexthub/IEndpointCommunication.aidl b/contexthub/aidl/android/hardware/contexthub/IEndpointCommunication.aidl
new file mode 100644
index 0000000..e5045ba
--- /dev/null
+++ b/contexthub/aidl/android/hardware/contexthub/IEndpointCommunication.aidl
@@ -0,0 +1,152 @@
+/*
+ * Copyright (C) 2024 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.contexthub;
+
+import android.hardware.contexthub.EndpointId;
+import android.hardware.contexthub.EndpointInfo;
+import android.hardware.contexthub.IEndpointCallback;
+import android.hardware.contexthub.Message;
+import android.hardware.contexthub.MessageDeliveryStatus;
+import android.hardware.contexthub.Reason;
+import android.hardware.contexthub.Service;
+
+@VintfStability
+interface IEndpointCommunication {
+    /**
+     * Publishes an endpoint from the calling side (e.g. Android). Endpoints must be registered
+     * prior to starting a session.
+     */
+    void registerEndpoint(in EndpointInfo endpoint);
+
+    /**
+     * Teardown an endpoint from the calling side (e.g. Android). This endpoint must have already
+     * been published via registerEndpoint().
+     */
+    void unregisterEndpoint(in EndpointInfo endpoint);
+
+    /**
+     * Request a range of session IDs for the caller to use when initiating sessions. This may be
+     * called more than once, but typical usage is to request a large enough range to accommodate
+     * the maximum expected number of concurrent sessions, but not overly large as to limit other
+     * clients.
+     *
+     * @param size The number of sessionId reserved for host-initiated sessions. This number should
+     *         be less than or equal to 1024.
+     *
+     * @return An array with two elements representing the smallest and largest possible session id
+     *         available for host.
+     *
+     * @throws EX_ILLEGAL_ARGUMENT if the size is invalid.
+     * @throws EX_SERVICE_SPECIFIC if the id range requested cannot be allocated.
+     */
+    int[2] requestSessionIdRange(int size);
+
+    /**
+     * Request to open a session for communication between an endpoint previously registered by the
+     * caller and a target endpoint found in getEndpoints(), optionally scoped to a service
+     * published by the target endpoint.
+     *
+     * Upon returning from this function, the session is in pending state, and the final result will
+     * be given by an asynchronous call to onEndpointSessionOpenComplete() on success, or
+     * onCloseEndpointSession() on failure.
+     *
+     * @param sessionId Caller-allocated session identifier, which must be unique across all active
+     *         sessions, and must fall in a range allocated via requestSessionIdRange().
+     * @param destination The EndpointId representing the destination side of the session.
+     * @param initiator The EndpointId representing the initiating side of the session, which
+     *         must've already been published through registerEndpoint().
+     * @param serviceDescriptor Descriptor for the service specification for scoping this session
+     *         (nullable). Null indicates a fully custom marshalling scheme. The value should match
+     *         a published descriptor for both destination and initiator.
+     *
+     * @throws EX_ILLEGAL_ARGUMENT if any of the arguments are invalid, or the combination of the
+     *         arguments is invalid.
+     * @throws EX_SERVICE_SPECIFIC on other errors
+     *         - EX_CONTEXT_HUB_UNSPECIFIED if the request failed for other reasons.
+     */
+    void openEndpointSession(int sessionId, in EndpointId destination, in EndpointId initiator,
+            in @nullable String serviceDescriptor);
+
+    /**
+     * Send a message from one endpoint to another on the (currently open) session.
+     *
+     * @param sessionId The integer representing the communication session, previously set in
+     *         openEndpointSession() or onEndpointSessionOpenRequest().
+     * @param msg The Message object representing a message to endpoint from the endpoint on host.
+     *
+     * @throws EX_ILLEGAL_ARGUMENT if any of the arguments are invalid, or the combination of the
+     *         arguments is invalid.
+     * @throws EX_SERVICE_SPECIFIC on other errors
+     *         - EX_CONTEXT_HUB_UNSPECIFIED if the request failed for other reasons.
+     */
+    void sendMessageToEndpoint(int sessionId, in Message msg);
+
+    /**
+     * Sends a message delivery status to the endpoint in response to receiving a Message with flag
+     * FLAG_REQUIRES_DELIVERY_STATUS. Each message with the flag should have a MessageDeliveryStatus
+     * response. This method sends the message delivery status back to the remote endpoint for a
+     * session.
+     *
+     * @param sessionId The integer representing the communication session, previously set in
+     *         openEndpointSession() or onEndpointSessionOpenRequest().
+     * @param msgStatus The MessageDeliveryStatus object representing the delivery status for a
+     *         specific message (identified by the sequenceNumber) within the session.
+     *
+     * @throws EX_UNSUPPORTED_OPERATION if ContextHubInfo.supportsReliableMessages is false for
+     *          the hub involved in this session.
+     */
+    void sendMessageDeliveryStatusToEndpoint(int sessionId, in MessageDeliveryStatus msgStatus);
+
+    /**
+     * Closes a session previously opened by openEndpointSession() or requested via
+     * onEndpointSessionOpenRequest(). Processing of session closure must be ordered/synchronized
+     * with message delivery, such that if this session was open, any messages previously passed to
+     * sendMessageToEndpoint() that are still in-flight must still be delivered before the session
+     * is closed. Any in-flight messages to the endpoint that requested to close the session will
+     * not be delivered.
+     *
+     * @param sessionId The integer representing the communication session, previously set in
+     *         openEndpointSession() or onEndpointSessionOpenRequest().
+     * @param reason The reason for this close endpoint session request.
+     *
+     * @throws EX_ILLEGAL_ARGUMENT if any of the arguments are invalid, or the combination of the
+     *         arguments is invalid.
+     * @throws EX_SERVICE_SPECIFIC on other errors
+     *         - EX_CONTEXT_HUB_UNSPECIFIED if the request failed for other reasons.
+     */
+    void closeEndpointSession(int sessionId, in Reason reason);
+
+    /**
+     * Notifies the HAL that the session requested by onEndpointSessionOpenRequest is ready to use.
+     *
+     * @param sessionId The integer representing the communication session, previously set in
+     *         onEndpointSessionOpenRequest(). This id is assigned by the HAL.
+     *
+     * @throws EX_ILLEGAL_ARGUMENT if any of the arguments are invalid, or the combination of the
+     *         arguments is invalid.
+     * @throws EX_SERVICE_SPECIFIC on other errors
+     *         - EX_CONTEXT_HUB_UNSPECIFIED if the request failed for other reasons.
+     */
+    void endpointSessionOpenComplete(int sessionId);
+
+    /**
+     * Unregisters this hub. Subsequent calls on this interface will fail.
+     *
+     * @throws EX_ILLEGAL_STATE if this interface was already unregistered.
+     */
+    void unregister();
+}
diff --git a/contexthub/aidl/default/Android.bp b/contexthub/aidl/default/Android.bp
index c0b147c..d4d03e4 100644
--- a/contexthub/aidl/default/Android.bp
+++ b/contexthub/aidl/default/Android.bp
@@ -89,5 +89,6 @@
     prebuilts: [
         "android.hardware.contexthub-service.example.rc",
         "contexthub-default.xml",
+        "android.hardware.context_hub.prebuilt.xml",
     ],
 }
diff --git a/contexthub/aidl/default/ContextHub.cpp b/contexthub/aidl/default/ContextHub.cpp
index 80c9575..433617e 100644
--- a/contexthub/aidl/default/ContextHub.cpp
+++ b/contexthub/aidl/default/ContextHub.cpp
@@ -70,21 +70,7 @@
 
 }  // anonymous namespace
 
-ScopedAStatus ContextHub::getContextHubs(std::vector<ContextHubInfo>* out_contextHubInfos) {
-    ContextHubInfo hub = {};
-    hub.name = "Mock Context Hub";
-    hub.vendor = "AOSP";
-    hub.toolchain = "n/a";
-    hub.id = kMockHubId;
-    hub.peakMips = 1;
-    hub.maxSupportedMessageLengthBytes = 4096;
-    hub.chrePlatformId = UINT64_C(0x476f6f6754000000);
-    hub.chreApiMajorVersion = 1;
-    hub.chreApiMinorVersion = 6;
-    hub.supportsReliableMessages = false;
-
-    out_contextHubInfos->push_back(hub);
-
+ScopedAStatus ContextHub::getContextHubs(std::vector<ContextHubInfo>* /* out_contextHubInfos */) {
     return ScopedAStatus::ok();
 }
 
@@ -164,10 +150,11 @@
 
 ScopedAStatus ContextHub::setTestMode(bool enable) {
     if (enable) {
-        std::unique_lock<std::mutex> lock(mEndpointMutex);
-        mEndpoints.clear();
-        mEndpointSessions.clear();
-        mEndpointCallback = nullptr;
+        std::lock_guard lock(mHostHubsLock);
+        for (auto& [id, hub] : mIdToHostHub) {
+            hub->mActive = false;
+        }
+        mIdToHostHub.clear();
     }
     return ScopedAStatus::ok();
 }
@@ -197,43 +184,26 @@
         return ScopedAStatus::fromExceptionCode(EX_ILLEGAL_ARGUMENT);
     }
 
-    ContextHubInfo hub = {};
-    hub.name = "Mock Context Hub";
-    hub.vendor = "AOSP";
-    hub.toolchain = "n/a";
-    hub.id = kMockHubId;
-    hub.peakMips = 1;
-    hub.maxSupportedMessageLengthBytes = 4096;
-    hub.chrePlatformId = UINT64_C(0x476f6f6754000000);
-    hub.chreApiMajorVersion = 1;
-    hub.chreApiMinorVersion = 6;
-    hub.supportsReliableMessages = false;
-
-    HubInfo hubInfo1 = {};
-    hubInfo1.hubId = hub.chrePlatformId;
-    hubInfo1.hubDetails = HubInfo::HubDetails::make<HubInfo::HubDetails::Tag::contextHubInfo>(hub);
-
     VendorHubInfo vendorHub = {};
     vendorHub.name = "Mock Vendor Hub";
     vendorHub.version = 42;
 
-    HubInfo hubInfo2 = {};
-    hubInfo2.hubId = kMockVendorHubId;
-    hubInfo2.hubDetails =
+    HubInfo hubInfo1 = {};
+    hubInfo1.hubId = kMockVendorHubId;
+    hubInfo1.hubDetails =
             HubInfo::HubDetails::make<HubInfo::HubDetails::Tag::vendorHubInfo>(vendorHub);
 
     VendorHubInfo vendorHub2 = {};
     vendorHub2.name = "Mock Vendor Hub 2";
     vendorHub2.version = 24;
 
-    HubInfo hubInfo3 = {};
-    hubInfo3.hubId = kMockVendorHub2Id;
-    hubInfo3.hubDetails =
+    HubInfo hubInfo2 = {};
+    hubInfo2.hubId = kMockVendorHub2Id;
+    hubInfo2.hubDetails =
             HubInfo::HubDetails::make<HubInfo::HubDetails::Tag::vendorHubInfo>(vendorHub2);
 
     _aidl_return->push_back(hubInfo1);
     _aidl_return->push_back(hubInfo2);
-    _aidl_return->push_back(hubInfo3);
 
     return ScopedAStatus::ok();
 };
@@ -258,7 +228,23 @@
     return ScopedAStatus::ok();
 };
 
-ScopedAStatus ContextHub::registerEndpoint(const EndpointInfo& in_endpoint) {
+ScopedAStatus ContextHub::registerEndpointHub(
+        const std::shared_ptr<IEndpointCallback>& in_callback, const HubInfo& in_hubInfo,
+        std::shared_ptr<IEndpointCommunication>* _aidl_return) {
+    std::lock_guard lock(mHostHubsLock);
+    if (mIdToHostHub.count(in_hubInfo.hubId)) {
+        return ScopedAStatus::fromExceptionCode(EX_ILLEGAL_STATE);
+    }
+    auto hub = ndk::SharedRefBase::make<HubInterface>(*this, in_callback, in_hubInfo);
+    mIdToHostHub.insert({in_hubInfo.hubId, hub});
+    *_aidl_return = std::move(hub);
+    return ScopedAStatus::ok();
+}
+
+ScopedAStatus ContextHub::HubInterface::registerEndpoint(const EndpointInfo& in_endpoint) {
+    if (!mActive) {
+        return ScopedAStatus::fromExceptionCode(EX_ILLEGAL_STATE);
+    }
     std::unique_lock<std::mutex> lock(mEndpointMutex);
 
     for (const EndpointInfo& endpoint : mEndpoints) {
@@ -271,7 +257,10 @@
     return ScopedAStatus::ok();
 };
 
-ScopedAStatus ContextHub::unregisterEndpoint(const EndpointInfo& in_endpoint) {
+ScopedAStatus ContextHub::HubInterface::unregisterEndpoint(const EndpointInfo& in_endpoint) {
+    if (!mActive) {
+        return ScopedAStatus::fromExceptionCode(EX_ILLEGAL_STATE);
+    }
     std::unique_lock<std::mutex> lock(mEndpointMutex);
 
     for (auto it = mEndpoints.begin(); it != mEndpoints.end(); ++it) {
@@ -283,41 +272,47 @@
     return ScopedAStatus::fromExceptionCode(EX_ILLEGAL_ARGUMENT);
 };
 
-ScopedAStatus ContextHub::registerEndpointCallback(
-        const std::shared_ptr<IEndpointCallback>& in_callback) {
-    std::unique_lock<std::mutex> lock(mEndpointMutex);
-
-    mEndpointCallback = in_callback;
-    return ScopedAStatus::ok();
-};
-
-ScopedAStatus ContextHub::requestSessionIdRange(int32_t in_size,
-                                                std::array<int32_t, 2>* _aidl_return) {
+ScopedAStatus ContextHub::HubInterface::requestSessionIdRange(
+        int32_t in_size, std::array<int32_t, 2>* _aidl_return) {
+    if (!mActive) {
+        return ScopedAStatus::fromExceptionCode(EX_ILLEGAL_STATE);
+    }
     constexpr int32_t kMaxSize = 1024;
     if (in_size > kMaxSize || _aidl_return == nullptr) {
         return ScopedAStatus::fromExceptionCode(EX_ILLEGAL_ARGUMENT);
     }
 
+    uint16_t base = 0;
     {
-        std::lock_guard<std::mutex> lock(mEndpointMutex);
-        mMaxValidSessionId = in_size;
+        std::lock_guard lock(mHal.mHostHubsLock);
+        if (static_cast<int32_t>(USHRT_MAX) - mHal.mNextSessionIdBase + 1 < in_size) {
+            return ScopedAStatus::fromServiceSpecificError(EX_CONTEXT_HUB_UNSPECIFIED);
+        }
+        base = mHal.mNextSessionIdBase;
+        mHal.mNextSessionIdBase += in_size;
     }
 
-    (*_aidl_return)[0] = 0;
-    (*_aidl_return)[1] = in_size;
+    {
+        std::lock_guard<std::mutex> lock(mEndpointMutex);
+        (*_aidl_return)[0] = mBaseSessionId = base;
+        (*_aidl_return)[1] = mMaxSessionId = base + (in_size - 1);
+    }
     return ScopedAStatus::ok();
 };
 
-ScopedAStatus ContextHub::openEndpointSession(
+ScopedAStatus ContextHub::HubInterface::openEndpointSession(
         int32_t in_sessionId, const EndpointId& in_destination, const EndpointId& in_initiator,
         const std::optional<std::string>& in_serviceDescriptor) {
+    if (!mActive) {
+        return ScopedAStatus::fromExceptionCode(EX_ILLEGAL_STATE);
+    }
     // We are not calling onCloseEndpointSession on failure because the remote endpoints (our
     // mock endpoints) always accept the session.
 
     std::weak_ptr<IEndpointCallback> callback;
     {
         std::unique_lock<std::mutex> lock(mEndpointMutex);
-        if (in_sessionId > mMaxValidSessionId) {
+        if (in_sessionId < mBaseSessionId || in_sessionId > mMaxSessionId) {
             ALOGE("openEndpointSession: session ID %" PRId32 " is invalid", in_sessionId);
             return ScopedAStatus::fromExceptionCode(EX_ILLEGAL_ARGUMENT);
         }
@@ -377,7 +372,11 @@
     return ScopedAStatus::ok();
 };
 
-ScopedAStatus ContextHub::sendMessageToEndpoint(int32_t in_sessionId, const Message& in_msg) {
+ScopedAStatus ContextHub::HubInterface::sendMessageToEndpoint(int32_t in_sessionId,
+                                                              const Message& in_msg) {
+    if (!mActive) {
+        return ScopedAStatus::fromExceptionCode(EX_ILLEGAL_STATE);
+    }
     std::weak_ptr<IEndpointCallback> callback;
     {
         std::unique_lock<std::mutex> lock(mEndpointMutex);
@@ -424,12 +423,19 @@
     return ScopedAStatus::ok();
 };
 
-ScopedAStatus ContextHub::sendMessageDeliveryStatusToEndpoint(
+ScopedAStatus ContextHub::HubInterface::sendMessageDeliveryStatusToEndpoint(
         int32_t /* in_sessionId */, const MessageDeliveryStatus& /* in_msgStatus */) {
+    if (!mActive) {
+        return ScopedAStatus::fromExceptionCode(EX_ILLEGAL_STATE);
+    }
     return ScopedAStatus::ok();
 };
 
-ScopedAStatus ContextHub::closeEndpointSession(int32_t in_sessionId, Reason /* in_reason */) {
+ScopedAStatus ContextHub::HubInterface::closeEndpointSession(int32_t in_sessionId,
+                                                             Reason /* in_reason */) {
+    if (!mActive) {
+        return ScopedAStatus::fromExceptionCode(EX_ILLEGAL_STATE);
+    }
     std::unique_lock<std::mutex> lock(mEndpointMutex);
 
     for (auto it = mEndpointSessions.begin(); it != mEndpointSessions.end(); ++it) {
@@ -442,8 +448,20 @@
     return ScopedAStatus::fromExceptionCode(EX_ILLEGAL_ARGUMENT);
 };
 
-ScopedAStatus ContextHub::endpointSessionOpenComplete(int32_t /* in_sessionId */) {
+ScopedAStatus ContextHub::HubInterface::endpointSessionOpenComplete(int32_t /* in_sessionId */) {
+    if (!mActive) {
+        return ScopedAStatus::fromExceptionCode(EX_ILLEGAL_STATE);
+    }
     return ScopedAStatus::ok();
 };
 
+ScopedAStatus ContextHub::HubInterface::unregister() {
+    if (!mActive.exchange(false)) {
+        return ScopedAStatus::fromExceptionCode(EX_ILLEGAL_STATE);
+    }
+    std::lock_guard lock(mHal.mHostHubsLock);
+    mHal.mIdToHostHub.erase(kInfo.hubId);
+    return ScopedAStatus::ok();
+}
+
 }  // namespace aidl::android::hardware::contexthub
diff --git a/contexthub/aidl/default/include/contexthub-impl/ContextHub.h b/contexthub/aidl/default/include/contexthub-impl/ContextHub.h
index 6da8bf2..65e84bb 100644
--- a/contexthub/aidl/default/include/contexthub-impl/ContextHub.h
+++ b/contexthub/aidl/default/include/contexthub-impl/ContextHub.h
@@ -17,7 +17,9 @@
 #pragma once
 
 #include <aidl/android/hardware/contexthub/BnContextHub.h>
+#include <aidl/android/hardware/contexthub/BnEndpointCommunication.h>
 
+#include <atomic>
 #include <mutex>
 #include <unordered_set>
 #include <vector>
@@ -56,54 +58,79 @@
 
     ::ndk::ScopedAStatus getHubs(std::vector<HubInfo>* _aidl_return) override;
     ::ndk::ScopedAStatus getEndpoints(std::vector<EndpointInfo>* _aidl_return) override;
-    ::ndk::ScopedAStatus registerEndpoint(const EndpointInfo& in_endpoint) override;
-    ::ndk::ScopedAStatus unregisterEndpoint(const EndpointInfo& in_endpoint) override;
-    ::ndk::ScopedAStatus registerEndpointCallback(
-            const std::shared_ptr<IEndpointCallback>& in_callback) override;
-    ::ndk::ScopedAStatus requestSessionIdRange(int32_t in_size,
-                                               std::array<int32_t, 2>* _aidl_return) override;
-    ::ndk::ScopedAStatus openEndpointSession(
-            int32_t in_sessionId, const EndpointId& in_destination, const EndpointId& in_initiator,
-            const std::optional<std::string>& in_serviceDescriptor) override;
-    ::ndk::ScopedAStatus sendMessageToEndpoint(int32_t in_sessionId,
-                                               const Message& in_msg) override;
-    ::ndk::ScopedAStatus sendMessageDeliveryStatusToEndpoint(
-            int32_t in_sessionId, const MessageDeliveryStatus& in_msgStatus) override;
-    ::ndk::ScopedAStatus closeEndpointSession(int32_t in_sessionId, Reason in_reason) override;
-    ::ndk::ScopedAStatus endpointSessionOpenComplete(int32_t in_sessionId) override;
+    ::ndk::ScopedAStatus registerEndpointHub(
+            const std::shared_ptr<IEndpointCallback>& in_callback, const HubInfo& in_hubInfo,
+            std::shared_ptr<IEndpointCommunication>* _aidl_return) override;
 
   private:
-    struct EndpointSession {
-        int32_t sessionId;
-        EndpointId initiator;
-        EndpointId peer;
-        std::optional<std::string> serviceDescriptor;
+    class HubInterface : public BnEndpointCommunication {
+      public:
+        HubInterface(ContextHub& hal, const std::shared_ptr<IEndpointCallback>& in_callback,
+                     const HubInfo& in_hubInfo)
+            : mHal(hal), mEndpointCallback(in_callback), kInfo(in_hubInfo) {}
+        ~HubInterface() = default;
+
+        ::ndk::ScopedAStatus registerEndpoint(const EndpointInfo& in_endpoint) override;
+        ::ndk::ScopedAStatus unregisterEndpoint(const EndpointInfo& in_endpoint) override;
+        ::ndk::ScopedAStatus requestSessionIdRange(int32_t in_size,
+                                                   std::array<int32_t, 2>* _aidl_return) override;
+        ::ndk::ScopedAStatus openEndpointSession(
+                int32_t in_sessionId, const EndpointId& in_destination,
+                const EndpointId& in_initiator,
+                const std::optional<std::string>& in_serviceDescriptor) override;
+        ::ndk::ScopedAStatus sendMessageToEndpoint(int32_t in_sessionId,
+                                                   const Message& in_msg) override;
+        ::ndk::ScopedAStatus sendMessageDeliveryStatusToEndpoint(
+                int32_t in_sessionId, const MessageDeliveryStatus& in_msgStatus) override;
+        ::ndk::ScopedAStatus closeEndpointSession(int32_t in_sessionId, Reason in_reason) override;
+        ::ndk::ScopedAStatus endpointSessionOpenComplete(int32_t in_sessionId) override;
+        ::ndk::ScopedAStatus unregister() override;
+
+      private:
+        friend class ContextHub;
+
+        struct EndpointSession {
+            int32_t sessionId;
+            EndpointId initiator;
+            EndpointId peer;
+            std::optional<std::string> serviceDescriptor;
+        };
+
+        //! Finds an endpoint in the range defined by the endpoints
+        //! @return whether the endpoint was found
+        template <typename Iter>
+        bool findEndpoint(const EndpointId& target, const Iter& begin, const Iter& end) {
+            for (auto iter = begin; iter != end; ++iter) {
+                if (iter->id.id == target.id && iter->id.hubId == target.hubId) {
+                    return true;
+                }
+            }
+            return false;
+        }
+
+        //! Endpoint storage and information
+        ContextHub& mHal;
+        std::shared_ptr<IEndpointCallback> mEndpointCallback;
+        const HubInfo kInfo;
+
+        std::atomic<bool> mActive = true;
+
+        std::mutex mEndpointMutex;
+        std::vector<EndpointInfo> mEndpoints;
+        std::vector<EndpointSession> mEndpointSessions;
+        uint16_t mBaseSessionId;
+        uint16_t mMaxSessionId;
     };
 
     static constexpr uint32_t kMockHubId = 0;
 
-    //! Finds an endpoint in the range defined by the endpoints
-    //! @return whether the endpoint was found
-    template <typename Iter>
-    bool findEndpoint(const EndpointId& target, const Iter& begin, const Iter& end) {
-        for (auto iter = begin; iter != end; ++iter) {
-            if (iter->id.id == target.id && iter->id.hubId == target.hubId) {
-                return true;
-            }
-        }
-        return false;
-    }
-
     std::shared_ptr<IContextHubCallback> mCallback;
 
     std::unordered_set<char16_t> mConnectedHostEndpoints;
 
-    //! Endpoint storage and information
-    std::mutex mEndpointMutex;
-    std::vector<EndpointInfo> mEndpoints;
-    std::vector<EndpointSession> mEndpointSessions;
-    std::shared_ptr<IEndpointCallback> mEndpointCallback;
-    int32_t mMaxValidSessionId = 0;
+    std::mutex mHostHubsLock;
+    std::unordered_map<int64_t, std::shared_ptr<HubInterface>> mIdToHostHub;
+    int32_t mNextSessionIdBase = 0;
 };
 
 }  // namespace contexthub
diff --git a/contexthub/aidl/vts/VtsAidlHalContextHubTargetTest.cpp b/contexthub/aidl/vts/VtsAidlHalContextHubTargetTest.cpp
index aa611ce..d7859d9 100644
--- a/contexthub/aidl/vts/VtsAidlHalContextHubTargetTest.cpp
+++ b/contexthub/aidl/vts/VtsAidlHalContextHubTargetTest.cpp
@@ -24,6 +24,7 @@
 #include <android/hardware/contexthub/IContextHub.h>
 #include <android/hardware/contexthub/IContextHubCallback.h>
 #include <android/hardware/contexthub/IEndpointCallback.h>
+#include <android/hardware/contexthub/IEndpointCommunication.h>
 #include <binder/IServiceManager.h>
 #include <binder/ProcessState.h>
 #include <log/log.h>
@@ -46,6 +47,7 @@
 using ::android::hardware::contexthub::HubInfo;
 using ::android::hardware::contexthub::IContextHub;
 using ::android::hardware::contexthub::IContextHubCallbackDefault;
+using ::android::hardware::contexthub::IEndpointCommunication;
 using ::android::hardware::contexthub::Message;
 using ::android::hardware::contexthub::MessageDeliveryStatus;
 using ::android::hardware::contexthub::NanoappBinary;
@@ -62,34 +64,71 @@
 // 6612b522-b717-41c8-b48d-c0b1cc64e142
 constexpr std::array<uint8_t, 16> kUuid = {0x66, 0x12, 0xb5, 0x22, 0xb7, 0x17, 0x41, 0xc8,
                                            0xb4, 0x8d, 0xc0, 0xb1, 0xcc, 0x64, 0xe1, 0x42};
+
 const String16 kName{"VtsAidlHalContextHubTargetTest"};
 
 const String16 kEchoServiceName{"android.hardware.contexthub.test.EchoService"};
 
+constexpr int64_t kDefaultHubId = 1;
+
+class TestEndpointCallback;
 class ContextHubAidl : public testing::TestWithParam<std::tuple<std::string, int32_t>> {
   public:
-    virtual void SetUp() override {
-        contextHub = android::waitForDeclaredService<IContextHub>(
+    void SetUp() override {
+        mContextHub = android::waitForDeclaredService<IContextHub>(
                 String16(std::get<0>(GetParam()).c_str()));
-        ASSERT_NE(contextHub, nullptr);
-
-        // Best effort enable test mode - this may not be supported on older HALS, so we
-        // ignore the return value.
-        contextHub->setTestMode(/* enable= */ true);
+        ASSERT_NE(mContextHub, nullptr);
+        mEndpointCb = sp<TestEndpointCallback>::make();
     }
 
-    virtual void TearDown() override { contextHub->setTestMode(/* enable= */ false); }
-
     uint32_t getHubId() { return std::get<1>(GetParam()); }
 
+    Status registerHub(int64_t id, sp<IEndpointCommunication>* hubInterface) {
+        HubInfo info;
+        info.hubId = id;
+        return mContextHub->registerEndpointHub(mEndpointCb, info, hubInterface);
+    }
+
+    bool registerDefaultHub() {
+        Status status = registerHub(kDefaultHubId, &mHubInterface);
+        if (status.exceptionCode() == Status::EX_UNSUPPORTED_OPERATION ||
+            status.transactionError() == android::UNKNOWN_TRANSACTION) {
+            return false;
+        }
+        EXPECT_TRUE(status.isOk());
+        EXPECT_NE(mHubInterface, nullptr);
+        if (!mHubInterface) {
+            return false;
+        }
+        return true;
+    }
+
     void testSettingChanged(Setting setting);
 
-    sp<IContextHub> contextHub;
+    sp<IContextHub> mContextHub;
+    sp<TestEndpointCallback> mEndpointCb;
+    sp<IEndpointCommunication> mHubInterface;
+};
+
+class ContextHubAidlWithTestMode : public ContextHubAidl {
+  public:
+    void SetUp() override {
+        ContextHubAidl::SetUp();
+
+        // Best effort enable test mode - this may not be supported on older HALS, so we
+        // ignore the return value.
+        mContextHub->setTestMode(/* enable= */ true);
+    }
+
+    void TearDown() override {
+        mContextHub->setTestMode(/* enable= */ false);
+        ContextHubAidl::TearDown();
+    }
 };
 
 TEST_P(ContextHubAidl, TestGetHubs) {
     std::vector<ContextHubInfo> hubs;
-    ASSERT_TRUE(contextHub->getContextHubs(&hubs).isOk());
+    ASSERT_TRUE(mContextHub->getContextHubs(&hubs).isOk());
 
     ALOGD("System reports %zu hubs", hubs.size());
 
@@ -111,7 +150,7 @@
 }
 
 TEST_P(ContextHubAidl, TestEnableTestMode) {
-    Status status = contextHub->setTestMode(true);
+    Status status = mContextHub->setTestMode(true);
     if (status.exceptionCode() == Status::EX_UNSUPPORTED_OPERATION ||
         status.transactionError() == android::UNKNOWN_TRANSACTION) {
         GTEST_SKIP() << "Not supported -> old API; or not implemented";
@@ -121,7 +160,7 @@
 }
 
 TEST_P(ContextHubAidl, TestDisableTestMode) {
-    Status status = contextHub->setTestMode(false);
+    Status status = mContextHub->setTestMode(false);
     if (status.exceptionCode() == Status::EX_UNSUPPORTED_OPERATION ||
         status.transactionError() == android::UNKNOWN_TRANSACTION) {
         GTEST_SKIP() << "Not supported -> old API; or not implemented";
@@ -170,7 +209,7 @@
 
 TEST_P(ContextHubAidl, TestRegisterCallback) {
     sp<EmptyContextHubCallback> cb = sp<EmptyContextHubCallback>::make();
-    ASSERT_TRUE(contextHub->registerCallback(getHubId(), cb).isOk());
+    ASSERT_TRUE(mContextHub->registerCallback(getHubId(), cb).isOk());
 }
 
 // Helper callback that puts the async appInfo callback data into a promise
@@ -219,8 +258,8 @@
 // Calls queryApps() and checks the returned metadata
 TEST_P(ContextHubAidl, TestQueryApps) {
     sp<QueryAppsCallback> cb = sp<QueryAppsCallback>::make();
-    ASSERT_TRUE(contextHub->registerCallback(getHubId(), cb).isOk());
-    ASSERT_TRUE(contextHub->queryNanoapps(getHubId()).isOk());
+    ASSERT_TRUE(mContextHub->registerCallback(getHubId(), cb).isOk());
+    ASSERT_TRUE(mContextHub->queryNanoapps(getHubId()).isOk());
 
     std::vector<NanoappInfo> appInfoList;
     ASSERT_TRUE(waitForCallback(cb->promise.get_future(), &appInfoList));
@@ -241,7 +280,7 @@
 // Calls getPreloadedNanoappsIds() and verifies there are preloaded nanoapps
 TEST_P(ContextHubAidl, TestGetPreloadedNanoappIds) {
     std::vector<int64_t> preloadedNanoappIds;
-    Status status = contextHub->getPreloadedNanoappIds(getHubId(), &preloadedNanoappIds);
+    Status status = mContextHub->getPreloadedNanoappIds(getHubId(), &preloadedNanoappIds);
     if (status.exceptionCode() == Status::EX_UNSUPPORTED_OPERATION ||
         status.transactionError() == android::UNKNOWN_TRANSACTION) {
         GTEST_SKIP() << "Not supported -> old API; or not implemented";
@@ -304,7 +343,7 @@
   public:
     virtual void SetUp() override {
         ContextHubAidl::SetUp();
-        ASSERT_TRUE(contextHub->registerCallback(getHubId(), cb).isOk());
+        ASSERT_TRUE(mContextHub->registerCallback(getHubId(), cb).isOk());
     }
 
     sp<TransactionResultCallback> cb = sp<TransactionResultCallback>::make();
@@ -318,7 +357,7 @@
     std::fill(message.messageBody.begin(), message.messageBody.end(), 0);
 
     ALOGD("Sending message to non-existent nanoapp");
-    ASSERT_TRUE(contextHub->sendMessageToHub(getHubId(), message).isOk());
+    ASSERT_TRUE(mContextHub->sendMessageToHub(getHubId(), message).isOk());
 }
 
 TEST_P(ContextHubTransactionTest, TestLoadEmptyNanoapp) {
@@ -332,7 +371,7 @@
     emptyApp.targetChreApiMinorVersion = 0;
 
     ALOGD("Loading empty nanoapp");
-    bool success = contextHub->loadNanoapp(getHubId(), emptyApp, cb->expectedTransactionId).isOk();
+    bool success = mContextHub->loadNanoapp(getHubId(), emptyApp, cb->expectedTransactionId).isOk();
     if (success) {
         bool transactionSuccess;
         ASSERT_TRUE(waitForCallback(cb->promise.get_future(), &transactionSuccess));
@@ -345,7 +384,7 @@
 
     ALOGD("Unloading nonexistent nanoapp");
     bool success =
-            contextHub->unloadNanoapp(getHubId(), kNonExistentAppId, cb->expectedTransactionId)
+            mContextHub->unloadNanoapp(getHubId(), kNonExistentAppId, cb->expectedTransactionId)
                     .isOk();
     if (success) {
         bool transactionSuccess;
@@ -359,7 +398,7 @@
 
     ALOGD("Enabling nonexistent nanoapp");
     bool success =
-            contextHub->enableNanoapp(getHubId(), kNonExistentAppId, cb->expectedTransactionId)
+            mContextHub->enableNanoapp(getHubId(), kNonExistentAppId, cb->expectedTransactionId)
                     .isOk();
     if (success) {
         bool transactionSuccess;
@@ -373,7 +412,7 @@
 
     ALOGD("Disabling nonexistent nanoapp");
     bool success =
-            contextHub->disableNanoapp(getHubId(), kNonExistentAppId, cb->expectedTransactionId)
+            mContextHub->disableNanoapp(getHubId(), kNonExistentAppId, cb->expectedTransactionId)
                     .isOk();
     if (success) {
         bool transactionSuccess;
@@ -386,10 +425,10 @@
     // In VTS, we only test that sending the values doesn't cause things to blow up - GTS tests
     // verify the expected E2E behavior in CHRE
     sp<EmptyContextHubCallback> cb = sp<EmptyContextHubCallback>::make();
-    ASSERT_TRUE(contextHub->registerCallback(getHubId(), cb).isOk());
+    ASSERT_TRUE(mContextHub->registerCallback(getHubId(), cb).isOk());
 
-    ASSERT_TRUE(contextHub->onSettingChanged(setting, true /* enabled */).isOk());
-    ASSERT_TRUE(contextHub->onSettingChanged(setting, false /* enabled */).isOk());
+    ASSERT_TRUE(mContextHub->onSettingChanged(setting, true /* enabled */).isOk());
+    ASSERT_TRUE(mContextHub->onSettingChanged(setting, false /* enabled */).isOk());
 }
 
 TEST_P(ContextHubAidl, TestOnLocationSettingChanged) {
@@ -444,27 +483,27 @@
     hostEndpointInfo.type = HostEndpointInfo::Type::NATIVE;
     hostEndpointInfo.hostEndpointId = kHostEndpointId;
 
-    ASSERT_TRUE(contextHub->onHostEndpointConnected(hostEndpointInfo).isOk());
-    ASSERT_TRUE(contextHub->onHostEndpointDisconnected(kHostEndpointId).isOk());
+    ASSERT_TRUE(mContextHub->onHostEndpointConnected(hostEndpointInfo).isOk());
+    ASSERT_TRUE(mContextHub->onHostEndpointDisconnected(kHostEndpointId).isOk());
 }
 
 TEST_P(ContextHubTransactionTest, TestInvalidHostConnection) {
     constexpr char16_t kHostEndpointId = 1;
 
-    ASSERT_TRUE(contextHub->onHostEndpointDisconnected(kHostEndpointId).isOk());
+    ASSERT_TRUE(mContextHub->onHostEndpointDisconnected(kHostEndpointId).isOk());
 }
 
 TEST_P(ContextHubTransactionTest, TestNanSessionStateChange) {
     NanSessionStateUpdate update;
     update.state = true;
-    Status status = contextHub->onNanSessionStateChanged(update);
+    Status status = mContextHub->onNanSessionStateChanged(update);
     if (status.exceptionCode() == Status::EX_UNSUPPORTED_OPERATION ||
         status.transactionError() == android::UNKNOWN_TRANSACTION) {
         GTEST_SKIP() << "Not supported -> old API; or not implemented";
     } else {
         ASSERT_TRUE(status.isOk());
         update.state = false;
-        ASSERT_TRUE(contextHub->onNanSessionStateChanged(update).isOk());
+        ASSERT_TRUE(mContextHub->onNanSessionStateChanged(update).isOk());
     }
 }
 
@@ -473,7 +512,7 @@
     messageDeliveryStatus.messageSequenceNumber = 123;
     messageDeliveryStatus.errorCode = ErrorCode::OK;
 
-    Status status = contextHub->sendMessageDeliveryStatusToHub(getHubId(), messageDeliveryStatus);
+    Status status = mContextHub->sendMessageDeliveryStatusToHub(getHubId(), messageDeliveryStatus);
     if (status.exceptionCode() == Status::EX_UNSUPPORTED_OPERATION ||
         status.transactionError() == android::UNKNOWN_TRANSACTION) {
         GTEST_SKIP() << "Not supported -> old API; or not implemented";
@@ -546,7 +585,30 @@
     bool mWasOnEndpointSessionOpenCompleteCalled = false;
 };
 
-TEST_P(ContextHubAidl, RegisterEndpoint) {
+TEST_P(ContextHubAidlWithTestMode, RegisterHub) {
+    if (!registerDefaultHub()) {
+        GTEST_SKIP() << "Not supported -> old API; or not implemented";
+    }
+
+    sp<IEndpointCommunication> hub2;
+    Status status = registerHub(kDefaultHubId + 1, &hub2);
+    EXPECT_TRUE(status.isOk());
+
+    sp<IEndpointCommunication> hub3;
+    status = registerHub(kDefaultHubId + 1, &hub3);
+    ASSERT_FALSE(status.isOk());
+    EXPECT_EQ(status.exceptionCode(), Status::EX_ILLEGAL_STATE);
+
+    hub2->unregister();
+    status = registerHub(kDefaultHubId + 1, &hub3);
+    EXPECT_TRUE(status.isOk());
+}
+
+TEST_P(ContextHubAidlWithTestMode, RegisterEndpoint) {
+    if (!registerDefaultHub()) {
+        GTEST_SKIP() << "Not supported -> old API; or not implemented";
+    }
+
     EndpointInfo endpointInfo;
     endpointInfo.id.id = 1;
     endpointInfo.id.hubId = 0xCAFECAFECAFECAFE;
@@ -554,7 +616,7 @@
     endpointInfo.name = String16("Test host endpoint 1");
     endpointInfo.version = 42;
 
-    Status status = contextHub->registerEndpoint(endpointInfo);
+    Status status = mHubInterface->registerEndpoint(endpointInfo);
     if (status.exceptionCode() == Status::EX_UNSUPPORTED_OPERATION ||
         status.transactionError() == android::UNKNOWN_TRANSACTION) {
         GTEST_SKIP() << "Not supported -> old API; or not implemented";
@@ -563,7 +625,11 @@
     }
 }
 
-TEST_P(ContextHubAidl, RegisterEndpointSameNameFailure) {
+TEST_P(ContextHubAidlWithTestMode, RegisterEndpointSameNameFailure) {
+    if (!registerDefaultHub()) {
+        GTEST_SKIP() << "Not supported -> old API; or not implemented";
+    }
+
     EndpointInfo endpointInfo;
     endpointInfo.id.id = 2;
     endpointInfo.id.hubId = 0xCAFECAFECAFECAFE;
@@ -578,7 +644,7 @@
     endpointInfo2.name = String16("Test host endpoint 2");
     endpointInfo2.version = 42;
 
-    Status status = contextHub->registerEndpoint(endpointInfo);
+    Status status = mHubInterface->registerEndpoint(endpointInfo);
     if (status.exceptionCode() == Status::EX_UNSUPPORTED_OPERATION ||
         status.transactionError() == android::UNKNOWN_TRANSACTION) {
         GTEST_SKIP() << "Not supported -> old API; or not implemented";
@@ -586,10 +652,14 @@
         EXPECT_TRUE(status.isOk());
     }
 
-    EXPECT_FALSE(contextHub->registerEndpoint(endpointInfo2).isOk());
+    EXPECT_FALSE(mHubInterface->registerEndpoint(endpointInfo2).isOk());
 }
 
-TEST_P(ContextHubAidl, RegisterEndpointSameIdFailure) {
+TEST_P(ContextHubAidlWithTestMode, RegisterEndpointSameIdFailure) {
+    if (!registerDefaultHub()) {
+        GTEST_SKIP() << "Not supported -> old API; or not implemented";
+    }
+
     EndpointInfo endpointInfo;
     endpointInfo.id.id = 4;
     endpointInfo.id.hubId = 0xCAFECAFECAFECAFE;
@@ -604,7 +674,7 @@
     endpointInfo2.name = String16("Test host endpoint - same ID test");
     endpointInfo2.version = 42;
 
-    Status status = contextHub->registerEndpoint(endpointInfo);
+    Status status = mHubInterface->registerEndpoint(endpointInfo);
     if (status.exceptionCode() == Status::EX_UNSUPPORTED_OPERATION ||
         status.transactionError() == android::UNKNOWN_TRANSACTION) {
         GTEST_SKIP() << "Not supported -> old API; or not implemented";
@@ -612,10 +682,14 @@
         EXPECT_TRUE(status.isOk());
     }
 
-    EXPECT_FALSE(contextHub->registerEndpoint(endpointInfo2).isOk());
+    EXPECT_FALSE(mHubInterface->registerEndpoint(endpointInfo2).isOk());
 }
 
-TEST_P(ContextHubAidl, UnregisterEndpoint) {
+TEST_P(ContextHubAidlWithTestMode, UnregisterEndpoint) {
+    if (!registerDefaultHub()) {
+        GTEST_SKIP() << "Not supported -> old API; or not implemented";
+    }
+
     EndpointInfo endpointInfo;
     endpointInfo.id.id = 6;
     endpointInfo.id.hubId = 0xCAFECAFECAFECAFE;
@@ -623,7 +697,7 @@
     endpointInfo.name = String16("Test host endpoint 6");
     endpointInfo.version = 42;
 
-    Status status = contextHub->registerEndpoint(endpointInfo);
+    Status status = mHubInterface->registerEndpoint(endpointInfo);
     if (status.exceptionCode() == Status::EX_UNSUPPORTED_OPERATION ||
         status.transactionError() == android::UNKNOWN_TRANSACTION) {
         GTEST_SKIP() << "Not supported -> old API; or not implemented";
@@ -631,10 +705,14 @@
         EXPECT_TRUE(status.isOk());
     }
 
-    EXPECT_TRUE(contextHub->unregisterEndpoint(endpointInfo).isOk());
+    EXPECT_TRUE(mHubInterface->unregisterEndpoint(endpointInfo).isOk());
 }
 
-TEST_P(ContextHubAidl, UnregisterEndpointNonexistent) {
+TEST_P(ContextHubAidlWithTestMode, UnregisterEndpointNonexistent) {
+    if (!registerDefaultHub()) {
+        GTEST_SKIP() << "Not supported -> old API; or not implemented";
+    }
+
     EndpointInfo endpointInfo;
     endpointInfo.id.id = 100;
     endpointInfo.id.hubId = 0xCAFECAFECAFECAFE;
@@ -642,7 +720,7 @@
     endpointInfo.name = String16("Test host endpoint 100");
     endpointInfo.version = 42;
 
-    Status status = contextHub->unregisterEndpoint(endpointInfo);
+    Status status = mHubInterface->unregisterEndpoint(endpointInfo);
     if (status.exceptionCode() == Status::EX_UNSUPPORTED_OPERATION ||
         status.transactionError() == android::UNKNOWN_TRANSACTION) {
         GTEST_SKIP() << "Not supported -> old API; or not implemented";
@@ -651,25 +729,9 @@
     }
 }
 
-TEST_P(ContextHubAidl, RegisterCallback) {
-    auto cb = sp<TestEndpointCallback>::make();
-    Status status = contextHub->registerEndpointCallback(cb);
-    if (status.exceptionCode() == Status::EX_UNSUPPORTED_OPERATION ||
-        status.transactionError() == android::UNKNOWN_TRANSACTION) {
+TEST_P(ContextHubAidlWithTestMode, OpenEndpointSessionInvalidRange) {
+    if (!registerDefaultHub()) {
         GTEST_SKIP() << "Not supported -> old API; or not implemented";
-    } else {
-        EXPECT_TRUE(status.isOk());
-    }
-}
-
-TEST_P(ContextHubAidl, OpenEndpointSessionInvalidRange) {
-    auto cb = sp<TestEndpointCallback>::make();
-    Status status = contextHub->registerEndpointCallback(cb);
-    if (status.exceptionCode() == Status::EX_UNSUPPORTED_OPERATION ||
-        status.transactionError() == android::UNKNOWN_TRANSACTION) {
-        GTEST_SKIP() << "Not supported -> old API; or not implemented";
-    } else {
-        EXPECT_TRUE(status.isOk());
     }
 
     // Register the endpoint
@@ -679,11 +741,11 @@
     initiatorEndpoint.type = EndpointInfo::EndpointType::NATIVE;
     initiatorEndpoint.name = String16("Test host endpoint 7");
     initiatorEndpoint.version = 42;
-    EXPECT_TRUE(contextHub->registerEndpoint(initiatorEndpoint).isOk());
+    EXPECT_TRUE(mHubInterface->registerEndpoint(initiatorEndpoint).isOk());
 
     // Find the destination, if it exists
     std::vector<EndpointInfo> endpoints;
-    EXPECT_TRUE(contextHub->getEndpoints(&endpoints).isOk());
+    EXPECT_TRUE(mContextHub->getEndpoints(&endpoints).isOk());
     const EndpointInfo* destinationEndpoint = nullptr;
     for (const EndpointInfo& endpoint : endpoints) {
         for (const Service& service : endpoint.services) {
@@ -700,30 +762,24 @@
     // Request the range
     constexpr int32_t requestedRange = 100;
     std::array<int32_t, 2> range;
-    ASSERT_TRUE(contextHub->requestSessionIdRange(requestedRange, &range).isOk());
+    ASSERT_TRUE(mHubInterface->requestSessionIdRange(requestedRange, &range).isOk());
     EXPECT_EQ(range.size(), 2);
     EXPECT_GE(range[1] - range[0] + 1, requestedRange);
 
     // Open the session
     int32_t sessionId = range[1] + 10;  // invalid
-    EXPECT_FALSE(contextHub
+    EXPECT_FALSE(mHubInterface
                          ->openEndpointSession(sessionId, destinationEndpoint->id,
                                                initiatorEndpoint.id,
                                                /* in_serviceDescriptor= */ kEchoServiceName)
                          .isOk());
 }
 
-TEST_P(ContextHubAidl, OpenEndpointSessionAndSendMessageEchoesBack) {
-    auto cb = sp<TestEndpointCallback>::make();
-    Status status = contextHub->registerEndpointCallback(cb);
-    if (status.exceptionCode() == Status::EX_UNSUPPORTED_OPERATION ||
-        status.transactionError() == android::UNKNOWN_TRANSACTION) {
+TEST_P(ContextHubAidlWithTestMode, OpenEndpointSessionAndSendMessageEchoesBack) {
+    if (!registerDefaultHub()) {
         GTEST_SKIP() << "Not supported -> old API; or not implemented";
-    } else {
-        EXPECT_TRUE(status.isOk());
     }
-
-    std::unique_lock<std::mutex> lock(cb->getMutex());
+    std::unique_lock<std::mutex> lock(mEndpointCb->getMutex());
 
     // Register the endpoint
     EndpointInfo initiatorEndpoint;
@@ -732,11 +788,11 @@
     initiatorEndpoint.type = EndpointInfo::EndpointType::NATIVE;
     initiatorEndpoint.name = String16("Test host endpoint 7");
     initiatorEndpoint.version = 42;
-    EXPECT_TRUE(contextHub->registerEndpoint(initiatorEndpoint).isOk());
+    EXPECT_TRUE(mHubInterface->registerEndpoint(initiatorEndpoint).isOk());
 
     // Find the destination, if it exists
     std::vector<EndpointInfo> endpoints;
-    EXPECT_TRUE(contextHub->getEndpoints(&endpoints).isOk());
+    EXPECT_TRUE(mContextHub->getEndpoints(&endpoints).isOk());
     const EndpointInfo* destinationEndpoint = nullptr;
     for (const EndpointInfo& endpoint : endpoints) {
         for (const Service& service : endpoint.services) {
@@ -753,32 +809,32 @@
     // Request the range
     constexpr int32_t requestedRange = 100;
     std::array<int32_t, 2> range;
-    ASSERT_TRUE(contextHub->requestSessionIdRange(requestedRange, &range).isOk());
+    ASSERT_TRUE(mHubInterface->requestSessionIdRange(requestedRange, &range).isOk());
     EXPECT_EQ(range.size(), 2);
     EXPECT_GE(range[1] - range[0] + 1, requestedRange);
 
     // Open the session
-    cb->resetWasOnEndpointSessionOpenCompleteCalled();
+    mEndpointCb->resetWasOnEndpointSessionOpenCompleteCalled();
     int32_t sessionId = range[0];
-    ASSERT_TRUE(contextHub
+    ASSERT_TRUE(mHubInterface
                         ->openEndpointSession(sessionId, destinationEndpoint->id,
                                               initiatorEndpoint.id,
                                               /* in_serviceDescriptor= */ kEchoServiceName)
                         .isOk());
-    cb->getCondVar().wait(lock);
-    EXPECT_TRUE(cb->wasOnEndpointSessionOpenCompleteCalled());
+    mEndpointCb->getCondVar().wait(lock);
+    EXPECT_TRUE(mEndpointCb->wasOnEndpointSessionOpenCompleteCalled());
 
     // Send the message
     Message message;
     message.flags = 0;
     message.sequenceNumber = 0;
     message.content.push_back(42);
-    ASSERT_TRUE(contextHub->sendMessageToEndpoint(sessionId, message).isOk());
+    ASSERT_TRUE(mHubInterface->sendMessageToEndpoint(sessionId, message).isOk());
 
     // Check for echo
-    cb->getCondVar().wait(lock);
-    EXPECT_FALSE(cb->getMessages().empty());
-    EXPECT_EQ(cb->getMessages().back().content.back(), 42);
+    mEndpointCb->getCondVar().wait(lock);
+    EXPECT_FALSE(mEndpointCb->getMessages().empty());
+    EXPECT_EQ(mEndpointCb->getMessages().back().content.back(), 42);
 }
 
 std::string PrintGeneratedTest(const testing::TestParamInfo<ContextHubAidl::ParamType>& info) {
@@ -789,13 +845,17 @@
 INSTANTIATE_TEST_SUITE_P(ContextHub, ContextHubAidl, testing::ValuesIn(generateContextHubMapping()),
                          PrintGeneratedTest);
 
+GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(ContextHubAidlWithTestMode);
+INSTANTIATE_TEST_SUITE_P(ContextHub, ContextHubAidlWithTestMode,
+                         testing::ValuesIn(generateContextHubMapping()), PrintGeneratedTest);
+
 GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(ContextHubTransactionTest);
 INSTANTIATE_TEST_SUITE_P(ContextHub, ContextHubTransactionTest,
                          testing::ValuesIn(generateContextHubMapping()), PrintGeneratedTest);
 
 int main(int argc, char** argv) {
     ::testing::InitGoogleTest(&argc, argv);
-    ProcessState::self()->setThreadPoolMaxThreadCount(1);
+    ProcessState::self()->setThreadPoolMaxThreadCount(2);
     ProcessState::self()->startThreadPool();
     return RUN_ALL_TESTS();
 }
diff --git a/security/keymint/aidl/aidl_api/android.hardware.security.keymint/current/android/hardware/security/keymint/IKeyMintDevice.aidl b/security/keymint/aidl/aidl_api/android.hardware.security.keymint/current/android/hardware/security/keymint/IKeyMintDevice.aidl
index 2945dab..e6d2fdf 100644
--- a/security/keymint/aidl/aidl_api/android.hardware.security.keymint/current/android/hardware/security/keymint/IKeyMintDevice.aidl
+++ b/security/keymint/aidl/aidl_api/android.hardware.security.keymint/current/android/hardware/security/keymint/IKeyMintDevice.aidl
@@ -45,6 +45,9 @@
   void deleteAllKeys();
   void destroyAttestationIds();
   android.hardware.security.keymint.BeginResult begin(in android.hardware.security.keymint.KeyPurpose purpose, in byte[] keyBlob, in android.hardware.security.keymint.KeyParameter[] params, in @nullable android.hardware.security.keymint.HardwareAuthToken authToken);
+  /**
+   * @deprecated Method has never been used due to design limitations
+   */
   void deviceLocked(in boolean passwordOnly, in @nullable android.hardware.security.secureclock.TimeStampToken timestampToken);
   void earlyBootEnded();
   byte[] convertStorageKeyToEphemeral(in byte[] storageKeyBlob);
diff --git a/security/keymint/aidl/android/hardware/security/keymint/IKeyMintDevice.aidl b/security/keymint/aidl/android/hardware/security/keymint/IKeyMintDevice.aidl
index b57dd8a..cafec70 100644
--- a/security/keymint/aidl/android/hardware/security/keymint/IKeyMintDevice.aidl
+++ b/security/keymint/aidl/android/hardware/security/keymint/IKeyMintDevice.aidl
@@ -826,6 +826,7 @@
      *
      * @param passwordOnly N/A due to the deprecation
      * @param timestampToken N/A due to the deprecation
+     * @deprecated Method has never been used due to design limitations
      */
     void deviceLocked(in boolean passwordOnly, in @nullable TimeStampToken timestampToken);
 
@@ -964,10 +965,11 @@
      * IKeyMintDevice must ignore KeyParameters with tags not included in the following list:
      *
      * o Tag::MODULE_HASH: holds a hash that must be included in attestations in the moduleHash
-     *   field of the software enforced authorization list. If Tag::MODULE_HASH is included in more
-     *   than one setAdditionalAttestationInfo call, the implementation should compare the initial
-     *   KeyParamValue with the more recent one. If they differ, the implementation should fail with
-     *   ErrorCode::MODULE_HASH_ALREADY_SET. If they are the same, no action needs to be taken.
+     *   field of the software enforced authorization list.
+     *
+     * @return error ErrorCode::MODULE_HASH_ALREADY_SET if this is not the first time
+     *         setAdditionalAttestationInfo is called with Tag::MODULE_HASH, and the associated
+     *         KeyParamValue of the current call doesn't match the KeyParamValue of the first call.
      */
     void setAdditionalAttestationInfo(in KeyParameter[] info);
 }
diff --git a/security/keymint/support/remote_prov_utils.cpp b/security/keymint/support/remote_prov_utils.cpp
index eaeec32..5afaf31 100644
--- a/security/keymint/support/remote_prov_utils.cpp
+++ b/security/keymint/support/remote_prov_utils.cpp
@@ -870,7 +870,7 @@
     }
 
     auto csr = hwtrust::Csr::validate(encodedCsr, *diceChainKind, false /*isFactory*/,
-                                      false /*allowAnyMode*/, deviceSuffix(instanceName));
+                                      true /*allowAnyMode*/, deviceSuffix(instanceName));
     if (!csr.ok()) {
         return csr.error().message();
     }
@@ -904,7 +904,7 @@
     }
 
     auto csr1 = hwtrust::Csr::validate(encodedCsr1, *diceChainKind, false /*isFactory*/,
-                                       false /*allowAnyMode*/, deviceSuffix(instanceName1));
+                                       true /*allowAnyMode*/, deviceSuffix(instanceName1));
     if (!csr1.ok()) {
         return csr1.error().message();
     }
@@ -921,7 +921,7 @@
     }
 
     auto csr2 = hwtrust::Csr::validate(encodedCsr2, *diceChainKind, false /*isFactory*/,
-                                       false /*allowAnyMode*/, deviceSuffix(instanceName2));
+                                       true /*allowAnyMode*/, deviceSuffix(instanceName2));
     if (!csr2.ok()) {
         return csr2.error().message();
     }
@@ -952,7 +952,7 @@
     }
 
     auto csr = hwtrust::Csr::validate(encodedCsr, *diceChainKind, false /*isFactory*/,
-                                      false /*allowAnyMode*/, deviceSuffix(DEFAULT_INSTANCE_NAME));
+                                      true /*allowAnyMode*/, deviceSuffix(DEFAULT_INSTANCE_NAME));
     if (!csr.ok()) {
         return csr.error().message();
     }
diff --git a/security/see/hwcrypto/aidl/aidl_api/android.hardware.security.see.hwcrypto/current/android/hardware/security/see/hwcrypto/IHwCryptoKey.aidl b/security/see/hwcrypto/aidl/aidl_api/android.hardware.security.see.hwcrypto/current/android/hardware/security/see/hwcrypto/IHwCryptoKey.aidl
index b31a06c..99eb761 100644
--- a/security/see/hwcrypto/aidl/aidl_api/android.hardware.security.see.hwcrypto/current/android/hardware/security/see/hwcrypto/IHwCryptoKey.aidl
+++ b/security/see/hwcrypto/aidl/aidl_api/android.hardware.security.see.hwcrypto/current/android/hardware/security/see/hwcrypto/IHwCryptoKey.aidl
@@ -64,7 +64,7 @@
     int keySizeBytes;
   }
   union DerivedKeyPolicy {
-    android.hardware.security.see.hwcrypto.IHwCryptoKey.ClearKeyPolicy clearKey;
+    android.hardware.security.see.hwcrypto.IHwCryptoKey.ClearKeyPolicy clearKeyPolicy;
     byte[] opaqueKey;
   }
   parcelable DerivedKeyParameters {
diff --git a/security/see/hwcrypto/aidl/aidl_api/android.hardware.security.see.hwcrypto/current/android/hardware/security/see/hwcrypto/IHwCryptoOperations.aidl b/security/see/hwcrypto/aidl/aidl_api/android.hardware.security.see.hwcrypto/current/android/hardware/security/see/hwcrypto/IHwCryptoOperations.aidl
index 7c87dd3..3adb2f9 100644
--- a/security/see/hwcrypto/aidl/aidl_api/android.hardware.security.see.hwcrypto/current/android/hardware/security/see/hwcrypto/IHwCryptoOperations.aidl
+++ b/security/see/hwcrypto/aidl/aidl_api/android.hardware.security.see.hwcrypto/current/android/hardware/security/see/hwcrypto/IHwCryptoOperations.aidl
@@ -34,5 +34,5 @@
 package android.hardware.security.see.hwcrypto;
 @VintfStability
 interface IHwCryptoOperations {
-  android.hardware.security.see.hwcrypto.CryptoOperationResult[] processCommandList(inout android.hardware.security.see.hwcrypto.CryptoOperationSet[] operations, out android.hardware.security.see.hwcrypto.CryptoOperationErrorAdditionalInfo additionalErrorInfo);
+  android.hardware.security.see.hwcrypto.CryptoOperationResult[] processCommandList(inout android.hardware.security.see.hwcrypto.CryptoOperationSet[] operations);
 }
diff --git a/security/see/hwcrypto/aidl/android/hardware/security/see/hwcrypto/IHwCryptoKey.aidl b/security/see/hwcrypto/aidl/android/hardware/security/see/hwcrypto/IHwCryptoKey.aidl
index 97a4c37..93d6cbc 100644
--- a/security/see/hwcrypto/aidl/android/hardware/security/see/hwcrypto/IHwCryptoKey.aidl
+++ b/security/see/hwcrypto/aidl/android/hardware/security/see/hwcrypto/IHwCryptoKey.aidl
@@ -107,10 +107,12 @@
          * If used we will derive a clear key and pass it back as an array of bytes on
          * <code>HwCryptoKeyMaterial::explicitKey</code>.
          */
-        ClearKeyPolicy clearKey;
+        ClearKeyPolicy clearKeyPolicy;
 
         /*
          * Policy for the newly derived opaque key. Defines how the key can be used and its type.
+         * Its definition can be found in <code>KeyPolicy.cddl</code>, which is basically a CBOR
+         * serialization of the file <code>KeyPolicy.aidl</code>.
          */
         byte[] opaqueKey;
     }
@@ -154,11 +156,14 @@
      *     Key to be used to derive the new key using HKDF.
      *
      * @return:
-     *     A DiceCurrentBoundKeyResult containint the versioned key tied the current client version
+     *     A DiceCurrentBoundKeyResult containing the versioned key tied the current client version
      *     on success.
      *
      * @throws:
-     *      ServiceSpecificException based on <code>HalErrorCode</code> if any error occurs.
+     *      ServiceSpecificException based on <code>HalErrorCode</code> if any error occurs,
+     *      in particular:
+     *          - BAD_PARAMETER if an invalid DeviceKeyId is requested.
+     *          - INVALID_KEY if an opaque key is provided that is not suitable for key derivation.
      */
     DiceCurrentBoundKeyResult deriveCurrentDicePolicyBoundKey(
             in DiceBoundDerivationKey derivationKey);
@@ -184,7 +189,11 @@
      *      success.
      *
      * @throws:
-     *      ServiceSpecificException based on <code>HalErrorCode</code> if any error occurs.
+     *      ServiceSpecificException based on <code>HalErrorCode</code> if any error occurs,
+     *      in particular:
+     *          - BAD_PARAMETER if an invalid DeviceKeyId is requested or if dicePolicyForKeyVersion
+     *            is not a valid encrypted DICE policy.
+     *          - INVALID_KEY if an opaque key is provided that is not suitable for key derivation.
      */
     DiceBoundKeyResult deriveDicePolicyBoundKey(
             in DiceBoundDerivationKey derivationKey, in byte[] dicePolicyForKeyVersion);
@@ -197,10 +206,15 @@
      *      file for more information.
      *
      * @return:
-     *      A HwCryptoKeyMaterial containing the derived key on success.
+     *      A <code>DerivedKey</code> containing the derived key on success.
      *
      * @throws:
-     *      ServiceSpecificException based on <code>HalErrorCode</code> if any error occurs.
+     *      ServiceSpecificException based on <code>HalErrorCode</code> if any error occurs,
+     *      in particular:
+     *          - BAD_PARAMETER if an invalid key policy is provided or if the key policy conflicts
+     *            with the requested key.
+     *          - SERIALIZATION_ERROR if the provided key policy is not a valid CBOR key policy.
+     *          - INVALID_KEY if an opaque key is provided that is not suitable for key derivation.
      */
     DerivedKey deriveKey(in DerivedKeyParameters parameters);
 
@@ -233,7 +247,11 @@
      *      IOpaqueKey on success.
      *
      * @throws:
-     *      ServiceSpecificException based on <code>HalErrorCode</code> if any error occurs.
+     *      ServiceSpecificException based on <code>HalErrorCode</code> if any error occurs,
+     *      in particular:
+     *          - BAD_PARAMETER if an invalid Key policy is provided or if the key policy conflicts
+     *            with provided key material.
+     *          - ALLOCATION_ERROR if the system runs out of memory while carring out the operation.
      */
     IOpaqueKey importClearKey(in ExplicitKeyMaterial keyMaterial, in KeyPolicy newKeyPolicy);
 
@@ -248,7 +266,9 @@
      * passing the receiver DICE policy to insure that only that receiver can import the key.
      *
      * @return:
-     *      byte[] on success, which is the caller encrypted DICE policy.
+     *      byte[] on success, which is the caller encrypted DICE policy. The DICE policy follows
+     *      the structure defined on DicePolicy.cddl, located under
+     *      hardware/interfaces/security/authgraph/aidl/android/hardware/security/authgraph/
      */
     byte[] getCurrentDicePolicy();
 
@@ -266,10 +286,14 @@
      *      DICE policy used to seal the exported key.
      *
      * @return:
-     *      An IOpaqueKey that can be directly be used on the local HWCrypto service on success.
+     *      An IOpaqueKey that can be directly used on the local HWCrypto service on success.
      *
      * @throws:
-     *      ServiceSpecificException based on <code>HalErrorCode</code> if any error occurs.
+     *      ServiceSpecificException based on <code>HalErrorCode</code> if any error occurs,
+     *      in particular:
+     *          - BAD_PARAMETER if an invalid encrypted sealing DICE policy is provided.
+     *          - ALLOCATION_ERROR if the system runs out of memory while carring out the operation.
+     *          - UNAUTHORIZED if the sealingDicePolicy do not match the caller.
      */
     IOpaqueKey keyTokenImport(in OpaqueKeyToken requestedKey, in byte[] sealingDicePolicy);
 
@@ -287,8 +311,9 @@
      *      An IOpaqueKey corresponding to the requested key slot on success.
      *
      * @throws:
-     *      ServiceSpecificException <code>UNAUTHORIZED</code> if the caller cannot access the
-     *      requested key, another specific error based on <code>HalErrorCode</code> otherwise.
+     *      ServiceSpecificException based on <code>HalErrorCode</code> if any error occurs,
+     *      in particular:
+     *          - UNAUTHORIZED if the caller cannot access the requested key.
      */
     IOpaqueKey getKeyslotData(KeySlot slotId);
 }
diff --git a/security/see/hwcrypto/aidl/android/hardware/security/see/hwcrypto/IHwCryptoOperations.aidl b/security/see/hwcrypto/aidl/android/hardware/security/see/hwcrypto/IHwCryptoOperations.aidl
index 9df6d67..dbe4d80 100644
--- a/security/see/hwcrypto/aidl/android/hardware/security/see/hwcrypto/IHwCryptoOperations.aidl
+++ b/security/see/hwcrypto/aidl/android/hardware/security/see/hwcrypto/IHwCryptoOperations.aidl
@@ -31,19 +31,21 @@
      *
      * @param operations:
      *      Parameter containing 1 or more set of commands to execute. Additionally, each set can
-     *      also contain a context on which the commands will be executed.
-     *
-     * @param additionalErrorInfo:
-     *      Structure containing additional info when errors are encountered. Only valid if the
-     *      function failed its execution.
+     *      also contain a context on which the commands will be executed. The parameter has type
+     *      inout because it can contain buffers used to write the output of the operation.
      *
      * @return:
      *      CryptoOperationResult[] on success, which can contain a context to continue executing
      *      each of the provided operations sets.
      *
      * @throws:
-     *      ServiceSpecificException based on <code>HalErrorCode</code> if any error occurs.
+     *      ServiceSpecificException based on <code>HalErrorCode</code> if any error occurs,
+     *      in particular:
+     *          - INVALID_KEY if the provided key is not compatible with the operation requested.
+     *          - BAD_STATE if the provided <code>CryptoOperationSet</code> contains operations that
+     *            cannot be carried out in the current server state.
+     *          - UNSUPPORTED if the requested operation is not supported by the server.
+     *          - ALLOCATION_ERROR if the system runs out of memory while carring out the operation.
      */
-    CryptoOperationResult[] processCommandList(inout CryptoOperationSet[] operations,
-            out CryptoOperationErrorAdditionalInfo additionalErrorInfo);
+    CryptoOperationResult[] processCommandList(inout CryptoOperationSet[] operations);
 }
diff --git a/tv/mediaquality/aidl/vts/functional/VtsHalMediaQualityTest.cpp b/tv/mediaquality/aidl/vts/functional/VtsHalMediaQualityTest.cpp
index f785cad..a01d4b0 100644
--- a/tv/mediaquality/aidl/vts/functional/VtsHalMediaQualityTest.cpp
+++ b/tv/mediaquality/aidl/vts/functional/VtsHalMediaQualityTest.cpp
@@ -35,6 +35,7 @@
 #include <android/binder_manager.h>
 #include <binder/IServiceManager.h>
 #include <binder/ProcessState.h>
+#include <log/log.h>
 #include <future>
 
 using aidl::android::hardware::graphics::common::PixelFormat;
@@ -63,6 +64,407 @@
 #define ASSERT_OK(ret) ASSERT_TRUE(ret.isOk())
 #define EXPECT_OK(ret) EXPECT_TRUE(ret.isOk())
 
+void validateParameterRange0To100(int value) {
+    EXPECT_GE(value, 0);
+    EXPECT_LE(value, 100);
+}
+
+void validateParameterRange0To2047(int value) {
+    EXPECT_GE(value, 0);
+    EXPECT_LE(value, 2047);
+}
+
+void validateColorTemperature(int value) {
+    EXPECT_GE(value, -100);
+    EXPECT_LE(value, 100);
+}
+
+void validatePictureParameter(const PictureParameter& param) {
+    switch (param.getTag()) {
+        case PictureParameter::Tag::brightness: {
+            ALOGD("[validatePictureParameter] validate brightness value");
+            float value = param.get<PictureParameter::Tag::brightness>();
+            EXPECT_TRUE(value >= 0.0f && value <= 1.0f);
+            break;
+        }
+        case PictureParameter::Tag::contrast: {
+            ALOGD("[validatePictureParameter] validate contrast value");
+            int value = param.get<PictureParameter::Tag::contrast>();
+            validateParameterRange0To100(value);
+            break;
+        }
+        case PictureParameter::Tag::sharpness: {
+            ALOGD("[validatePictureParameter] validate sharpness value");
+            int value = param.get<PictureParameter::Tag::sharpness>();
+            validateParameterRange0To100(value);
+            break;
+        }
+        case PictureParameter::Tag::saturation: {
+            ALOGD("[validatePictureParameter] validate saturation value");
+            int value = param.get<PictureParameter::Tag::saturation>();
+            validateParameterRange0To100(value);
+            break;
+        }
+        case PictureParameter::Tag::hue: {
+            ALOGD("[validatePictureParameter] validate hue value");
+            int value = param.get<PictureParameter::Tag::hue>();
+            EXPECT_GE(value, -50);
+            EXPECT_LE(value, 50);
+            break;
+        }
+        case PictureParameter::Tag::colorTunerBrightness: {
+            ALOGD("[validatePictureParameter] validate colorTunerBrightness value");
+            int value = param.get<PictureParameter::Tag::colorTunerBrightness>();
+            validateParameterRange0To100(value);
+            break;
+        }
+        case PictureParameter::Tag::colorTunerSaturation: {
+            ALOGD("[validatePictureParameter] validate colorTunerSaturation value");
+            int value = param.get<PictureParameter::Tag::colorTunerSaturation>();
+            validateParameterRange0To100(value);
+            break;
+        }
+        case PictureParameter::Tag::colorTunerHue: {
+            ALOGD("[validatePictureParameter] validate colorTunerHue value");
+            int value = param.get<PictureParameter::Tag::colorTunerHue>();
+            EXPECT_GE(value, -50);
+            EXPECT_LE(value, 50);
+            break;
+        }
+        case PictureParameter::Tag::colorTunerRedOffset: {
+            ALOGD("[validatePictureParameter] validate colorTunerRedOffset value");
+            int value = param.get<PictureParameter::Tag::colorTunerRedOffset>();
+            validateParameterRange0To100(value);
+            break;
+        }
+        case PictureParameter::Tag::colorTunerGreenOffset: {
+            ALOGD("[validatePictureParameter] validate colorTunerGreenOffset value");
+            int value = param.get<PictureParameter::Tag::colorTunerGreenOffset>();
+            validateParameterRange0To100(value);
+            break;
+        }
+        case PictureParameter::Tag::colorTunerBlueOffset: {
+            ALOGD("[validatePictureParameter] validate colorTunerBlueOffset value");
+            int value = param.get<PictureParameter::Tag::colorTunerBlueOffset>();
+            validateParameterRange0To100(value);
+            break;
+        }
+        case PictureParameter::Tag::colorTunerRedGain: {
+            ALOGD("[validatePictureParameter] validate colorTunerRedGain value");
+            int value = param.get<PictureParameter::Tag::colorTunerRedGain>();
+            validateParameterRange0To100(value);
+            break;
+        }
+        case PictureParameter::Tag::colorTunerGreenGain: {
+            ALOGD("[validatePictureParameter] validate colorTunerGreenGain value");
+            int value = param.get<PictureParameter::Tag::colorTunerGreenGain>();
+            validateParameterRange0To100(value);
+            break;
+        }
+        case PictureParameter::Tag::colorTunerBlueGain: {
+            ALOGD("[validatePictureParameter] validate colorTunerBlueGain value");
+            int value = param.get<PictureParameter::Tag::colorTunerBlueGain>();
+            validateParameterRange0To100(value);
+            break;
+        }
+        case PictureParameter::Tag::panelInitMaxLuminceNits: {
+            ALOGD("[validatePictureParameter] validate panelInitMaxLuminceNits value");
+            int value = param.get<PictureParameter::Tag::panelInitMaxLuminceNits>();
+            EXPECT_GE(value, 0);
+            EXPECT_LE(value, 10000);
+            break;
+        }
+        case PictureParameter::Tag::colorTemperatureRedGain: {
+            ALOGD("[validatePictureParameter] validate colorTemperatureRedGain value");
+            int value = param.get<PictureParameter::Tag::colorTemperatureRedGain>();
+            validateColorTemperature(value);
+            break;
+        }
+        case PictureParameter::Tag::colorTemperatureGreenGain: {
+            ALOGD("[validatePictureParameter] validate colorTemperatureGreenGain value");
+            int value = param.get<PictureParameter::Tag::colorTemperatureGreenGain>();
+            validateColorTemperature(value);
+            break;
+        }
+        case PictureParameter::Tag::colorTemperatureBlueGain: {
+            ALOGD("[validatePictureParameter] validate colorTemperatureBlueGain value");
+            int value = param.get<PictureParameter::Tag::colorTemperatureBlueGain>();
+            validateColorTemperature(value);
+            break;
+        }
+        case PictureParameter::Tag::colorTemperatureRedOffset: {
+            ALOGD("[validatePictureParameter] validate ccolorTemperatureRedOffset value");
+            int value = param.get<PictureParameter::Tag::colorTemperatureRedOffset>();
+            validateColorTemperature(value);
+            break;
+        }
+        case PictureParameter::Tag::colorTemperatureGreenOffset: {
+            ALOGD("[validatePictureParameter] validate colorTemperatureGreenOffset value");
+            int value = param.get<PictureParameter::Tag::colorTemperatureGreenOffset>();
+            validateColorTemperature(value);
+            break;
+        }
+        case PictureParameter::Tag::colorTemperatureBlueOffset: {
+            ALOGD("[validatePictureParameter] validate colorTemperatureBlueOffset value");
+            int value = param.get<PictureParameter::Tag::colorTemperatureBlueOffset>();
+            validateColorTemperature(value);
+            break;
+        }
+        case PictureParameter::Tag::elevenPointRed: {
+            ALOGD("[validatePictureParameter] validate elevenPointRed value");
+            std::array<int, 11> elevenPointValues =
+                    param.get<PictureParameter::Tag::elevenPointRed>();
+            for (int value : elevenPointValues) {
+                validateParameterRange0To100(value);
+            }
+            break;
+        }
+        case PictureParameter::Tag::elevenPointGreen: {
+            ALOGD("[validatePictureParameter] validate elevenPointGreen value");
+            std::array<int, 11> elevenPointValues =
+                    param.get<PictureParameter::Tag::elevenPointGreen>();
+            for (int value : elevenPointValues) {
+                validateParameterRange0To100(value);
+            }
+            break;
+        }
+        case PictureParameter::Tag::elevenPointBlue: {
+            ALOGD("[validatePictureParameter] validate elevenPointBlue value");
+            std::array<int, 11> elevenPointValues =
+                    param.get<PictureParameter::Tag::elevenPointBlue>();
+            for (int value : elevenPointValues) {
+                validateParameterRange0To100(value);
+            }
+            break;
+        }
+        case PictureParameter::Tag::osdRedGain: {
+            ALOGD("[validatePictureParameter] validate osdRedGain value");
+            int value = param.get<PictureParameter::Tag::osdRedGain>();
+            validateParameterRange0To2047(value);
+            break;
+        }
+        case PictureParameter::Tag::osdGreenGain: {
+            ALOGD("[validatePictureParameter] validate osdGreenGain value");
+            int value = param.get<PictureParameter::Tag::osdGreenGain>();
+            validateParameterRange0To2047(value);
+            break;
+        }
+        case PictureParameter::Tag::osdBlueGain: {
+            ALOGD("[validatePictureParameter] validate osdBlueGain value");
+            int value = param.get<PictureParameter::Tag::osdBlueGain>();
+            validateParameterRange0To2047(value);
+            break;
+        }
+        case PictureParameter::Tag::osdRedOffset: {
+            ALOGD("[validatePictureParameter] validate osdRedOffset value");
+            int value = param.get<PictureParameter::Tag::osdRedOffset>();
+            validateParameterRange0To2047(value);
+            break;
+        }
+        case PictureParameter::Tag::osdGreenOffset: {
+            ALOGD("[validatePictureParameter] validate osdGreenOffset value");
+            int value = param.get<PictureParameter::Tag::osdGreenOffset>();
+            validateParameterRange0To2047(value);
+            break;
+        }
+        case PictureParameter::Tag::osdBlueOffset: {
+            ALOGD("[validatePictureParameter] validate osdBlueOffset value");
+            int value = param.get<PictureParameter::Tag::osdBlueOffset>();
+            validateParameterRange0To2047(value);
+            break;
+        }
+        case PictureParameter::Tag::osdHue: {
+            ALOGD("[validatePictureParameter] validate osdHue value");
+            int value = param.get<PictureParameter::Tag::osdHue>();
+            validateParameterRange0To100(value);
+            break;
+        }
+        case PictureParameter::Tag::osdSaturation: {
+            ALOGD("[validatePictureParameter] validate osdSaturation value");
+            int value = param.get<PictureParameter::Tag::osdSaturation>();
+            EXPECT_GE(value, 0);
+            EXPECT_LE(value, 255);
+            break;
+        }
+        case PictureParameter::Tag::osdContrast: {
+            ALOGD("[validatePictureParameter] validate osdContrast value");
+            int value = param.get<PictureParameter::Tag::osdContrast>();
+            validateParameterRange0To2047(value);
+            break;
+        }
+        case PictureParameter::Tag::colorTunerHueRed: {
+            ALOGD("[validatePictureParameter] validate colorTunerHueRed value");
+            int value = param.get<PictureParameter::Tag::colorTunerHueRed>();
+            validateParameterRange0To100(value);
+            break;
+        }
+        case PictureParameter::Tag::colorTunerHueGreen: {
+            ALOGD("[validatePictureParameter] validate colorTunerHueGreen value");
+            int value = param.get<PictureParameter::Tag::colorTunerHueGreen>();
+            validateParameterRange0To100(value);
+            break;
+        }
+        case PictureParameter::Tag::colorTunerHueBlue: {
+            ALOGD("[validatePictureParameter] validate colorTunerHueBlue value");
+            int value = param.get<PictureParameter::Tag::colorTunerHueBlue>();
+            validateParameterRange0To100(value);
+            break;
+        }
+        case PictureParameter::Tag::colorTunerHueCyan: {
+            ALOGD("[validatePictureParameter] validate colorTunerHueCyan value");
+            int value = param.get<PictureParameter::Tag::colorTunerHueCyan>();
+            validateParameterRange0To100(value);
+            break;
+        }
+        case PictureParameter::Tag::colorTunerHueMagenta: {
+            ALOGD("[validatePictureParameter] validate colorTunerHueMagenta value");
+            int value = param.get<PictureParameter::Tag::colorTunerHueMagenta>();
+            validateParameterRange0To100(value);
+            break;
+        }
+        case PictureParameter::Tag::colorTunerHueYellow: {
+            ALOGD("[validatePictureParameter] validate colorTunerHueYellow value");
+            int value = param.get<PictureParameter::Tag::colorTunerHueYellow>();
+            validateParameterRange0To100(value);
+            break;
+        }
+        case PictureParameter::Tag::colorTunerHueFlesh: {
+            ALOGD("[validatePictureParameter] validate colorTunerHueFlesh value");
+            int value = param.get<PictureParameter::Tag::colorTunerHueFlesh>();
+            validateParameterRange0To100(value);
+            break;
+        }
+        case PictureParameter::Tag::colorTunerSaturationRed: {
+            ALOGD("[validatePictureParameter] validate colorTunerSaturationRed value");
+            int value = param.get<PictureParameter::Tag::colorTunerSaturationRed>();
+            validateParameterRange0To100(value);
+            break;
+        }
+        case PictureParameter::Tag::colorTunerSaturationGreen: {
+            ALOGD("[validatePictureParameter] validate colorTunerSaturationGreen value");
+            int value = param.get<PictureParameter::Tag::colorTunerSaturationGreen>();
+            validateParameterRange0To100(value);
+            break;
+        }
+        case PictureParameter::Tag::colorTunerSaturationBlue: {
+            ALOGD("[validatePictureParameter] validate colorTunerSaturationBlue value");
+            int value = param.get<PictureParameter::Tag::colorTunerSaturationBlue>();
+            validateParameterRange0To100(value);
+            break;
+        }
+        case PictureParameter::Tag::colorTunerSaturationCyan: {
+            ALOGD("[validatePictureParameter] validate colorTunerSaturationCyan value");
+            int value = param.get<PictureParameter::Tag::colorTunerSaturationCyan>();
+            validateParameterRange0To100(value);
+            break;
+        }
+        case PictureParameter::Tag::colorTunerSaturationMagenta: {
+            ALOGD("[validatePictureParameter] validate colorTunerSaturationMagenta value");
+            int value = param.get<PictureParameter::Tag::colorTunerSaturationMagenta>();
+            validateParameterRange0To100(value);
+            break;
+        }
+        case PictureParameter::Tag::colorTunerSaturationYellow: {
+            ALOGD("[validatePictureParameter] validate colorTunerSaturationYellow value");
+            int value = param.get<PictureParameter::Tag::colorTunerSaturationYellow>();
+            validateParameterRange0To100(value);
+            break;
+        }
+        case PictureParameter::Tag::colorTunerSaturationFlesh: {
+            ALOGD("[validatePictureParameter] validate colorTunerSaturationFlesh value");
+            int value = param.get<PictureParameter::Tag::colorTunerSaturationFlesh>();
+            validateParameterRange0To100(value);
+            break;
+        }
+        case PictureParameter::Tag::colorTunerLuminanceRed: {
+            ALOGD("[validatePictureParameter] validate colorTunerLuminanceRed value");
+            int value = param.get<PictureParameter::Tag::colorTunerLuminanceRed>();
+            validateParameterRange0To100(value);
+            break;
+        }
+        case PictureParameter::Tag::colorTunerLuminanceGreen: {
+            ALOGD("[validatePictureParameter] validate colorTunerLuminanceGreen value");
+            int value = param.get<PictureParameter::Tag::colorTunerLuminanceGreen>();
+            validateParameterRange0To100(value);
+            break;
+        }
+        case PictureParameter::Tag::colorTunerLuminanceBlue: {
+            ALOGD("[validatePictureParameter] validate colorTunerLuminanceBlue value");
+            int value = param.get<PictureParameter::Tag::colorTunerLuminanceBlue>();
+            validateParameterRange0To100(value);
+            break;
+        }
+        case PictureParameter::Tag::colorTunerLuminanceCyan: {
+            ALOGD("[validatePictureParameter] validate colorTunerLuminanceCyan value");
+            int value = param.get<PictureParameter::Tag::colorTunerLuminanceCyan>();
+            validateParameterRange0To100(value);
+            break;
+        }
+        case PictureParameter::Tag::colorTunerLuminanceMagenta: {
+            ALOGD("[validatePictureParameter] validate colorTunerLuminanceMagenta value");
+            int value = param.get<PictureParameter::Tag::colorTunerLuminanceMagenta>();
+            validateParameterRange0To100(value);
+            break;
+        }
+        case PictureParameter::Tag::colorTunerLuminanceYellow: {
+            ALOGD("[validatePictureParameter] validate colorTunerLuminanceYellow value");
+            int value = param.get<PictureParameter::Tag::colorTunerLuminanceYellow>();
+            validateParameterRange0To100(value);
+            break;
+        }
+        case PictureParameter::Tag::colorTunerLuminanceFlesh: {
+            ALOGD("[validatePictureParameter] validate colorTunerLuminanceFlesh value");
+            int value = param.get<PictureParameter::Tag::colorTunerLuminanceFlesh>();
+            validateParameterRange0To100(value);
+            break;
+        }
+        default:
+            ALOGD("Those parameters don't need to check.");
+            break;
+    }
+}
+
+void validateSoundParameter(const SoundParameter& param) {
+    switch (param.getTag()) {
+        case SoundParameter::Tag::balance: {
+            ALOGD("[validateSoundParameter] validate balance value");
+            int value = param.get<SoundParameter::Tag::balance>();
+            EXPECT_GE(value, -50);
+            EXPECT_LE(value, 50);
+            break;
+        }
+        case SoundParameter::Tag::bass: {
+            ALOGD("[validateSoundParameter] validate bass value");
+            int value = param.get<SoundParameter::Tag::bass>();
+            validateParameterRange0To100(value);
+            break;
+        }
+        case SoundParameter::Tag::treble: {
+            ALOGD("[validateSoundParameter] validate treble value");
+            int value = param.get<SoundParameter::Tag::treble>();
+            validateParameterRange0To100(value);
+            break;
+        }
+        case SoundParameter::Tag::speakersDelayMs: {
+            ALOGD("[validateSoundParameter] validate speakersDelayMs value");
+            int value = param.get<SoundParameter::Tag::speakersDelayMs>();
+            EXPECT_GE(value, 0);
+            EXPECT_LE(value, 250);
+            break;
+        }
+        case SoundParameter::Tag::digitalOutputDelayMs: {
+            ALOGD("[validateSoundParameter] validate digitalOutputDelayMs value");
+            int value = param.get<SoundParameter::Tag::digitalOutputDelayMs>();
+            EXPECT_GE(value, 0);
+            EXPECT_LE(value, 250);
+            break;
+        }
+        default:
+            ALOGD("Those parameters don't need to check.");
+            break;
+    }
+}
+
 class MediaQualityCallback : public BnMediaQualityCallback {
   public:
     explicit MediaQualityCallback(
@@ -83,7 +485,11 @@
             const std::function<void(const PictureProfile& pictureProfile)>&
                     on_hal_picture_profile_adjust)
         : on_hal_picture_profile_adjust_(on_hal_picture_profile_adjust) {}
+
     ScopedAStatus onPictureProfileAdjusted(const PictureProfile& pictureProfile) override {
+        for (const auto& param : pictureProfile.parameters.pictureParameters) {
+            validatePictureParameter(param);
+        }
         on_hal_picture_profile_adjust_(pictureProfile);
         return ScopedAStatus::ok();
     }
@@ -111,7 +517,11 @@
             const std::function<void(const SoundProfile& soundProfile)>&
                     on_hal_sound_profile_adjust)
         : on_hal_sound_profile_adjust_(on_hal_sound_profile_adjust) {}
+
     ScopedAStatus onSoundProfileAdjusted(const SoundProfile& soundProfile) override {
+        for (const auto& param : soundProfile.parameters.soundParameters) {
+            validateSoundParameter(param);
+        }
         on_hal_sound_profile_adjust_(soundProfile);
         return ScopedAStatus::ok();
     }
diff --git a/wifi/aidl/vts/functional/wifi_aidl_test_utils.cpp b/wifi/aidl/vts/functional/wifi_aidl_test_utils.cpp
index c68d8fd..202082e 100644
--- a/wifi/aidl/vts/functional/wifi_aidl_test_utils.cpp
+++ b/wifi/aidl/vts/functional/wifi_aidl_test_utils.cpp
@@ -276,3 +276,28 @@
     }
     return std::optional<std::vector<std::optional<OuiKeyedData>>>{dataList};
 }
+
+IWifiChip::ApIfaceParams generateApIfaceParams(IfaceConcurrencyType type, bool uses_mlo,
+                                               int oui_size) {
+    IWifiChip::ApIfaceParams params;
+    params.ifaceType = type;
+    params.usesMlo = uses_mlo;
+    params.vendorData = generateOuiKeyedDataListOptional(oui_size);
+    return params;
+}
+
+std::shared_ptr<IWifiApIface> getWifiApOrBridgedApIface(std::shared_ptr<IWifiChip> wifi_chip,
+                                                        IWifiChip::ApIfaceParams params) {
+    if (!wifi_chip.get()) {
+        return nullptr;
+    }
+    std::shared_ptr<IWifiApIface> iface;
+    if (!configureChipToSupportConcurrencyTypeInternal(wifi_chip, IfaceConcurrencyType::AP)) {
+        return nullptr;
+    }
+    auto status = wifi_chip->createApOrBridgedApIfaceWithParams(params, &iface);
+    if (!status.isOk()) {
+        return nullptr;
+    }
+    return iface;
+}
diff --git a/wifi/aidl/vts/functional/wifi_aidl_test_utils.h b/wifi/aidl/vts/functional/wifi_aidl_test_utils.h
index 9b47a9f..6d98bf0 100644
--- a/wifi/aidl/vts/functional/wifi_aidl_test_utils.h
+++ b/wifi/aidl/vts/functional/wifi_aidl_test_utils.h
@@ -43,6 +43,8 @@
 std::shared_ptr<IWifiApIface> getWifiApIface(std::shared_ptr<IWifiChip> wifi_chip);
 std::shared_ptr<IWifiApIface> getBridgedWifiApIface(const char* instance_name);
 std::shared_ptr<IWifiApIface> getBridgedWifiApIface(std::shared_ptr<IWifiChip> wifi_chip);
+std::shared_ptr<IWifiApIface> getWifiApOrBridgedApIface(std::shared_ptr<IWifiChip> wifi_chip,
+                                                        IWifiChip::ApIfaceParams params);
 // Configure the chip in a mode to support the creation of the provided iface type.
 bool configureChipToSupportConcurrencyType(const std::shared_ptr<IWifiChip>& wifi_chip,
                                            IfaceConcurrencyType type, int* configured_mode_id);
@@ -57,3 +59,7 @@
 // Generate test vendor data.
 std::vector<OuiKeyedData> generateOuiKeyedDataList(int size);
 std::optional<std::vector<std::optional<OuiKeyedData>>> generateOuiKeyedDataListOptional(int size);
+
+// Generate test ApIfaceParams
+IWifiChip::ApIfaceParams generateApIfaceParams(IfaceConcurrencyType type, bool uses_mlo,
+                                               int oui_size);
diff --git a/wifi/aidl/vts/functional/wifi_chip_aidl_test.cpp b/wifi/aidl/vts/functional/wifi_chip_aidl_test.cpp
index a1b9ce1..b4cb030 100644
--- a/wifi/aidl/vts/functional/wifi_chip_aidl_test.cpp
+++ b/wifi/aidl/vts/functional/wifi_chip_aidl_test.cpp
@@ -52,6 +52,7 @@
         stopWifiService(getInstanceName());
         wifi_chip_ = getWifiChip(getInstanceName());
         ASSERT_NE(nullptr, wifi_chip_.get());
+        ASSERT_TRUE(wifi_chip_->getInterfaceVersion(&interface_version_).isOk());
     }
 
     void TearDown() override { stopWifiService(getInstanceName()); }
@@ -139,6 +140,7 @@
     const char* getInstanceName() { return GetParam().c_str(); }
 
     std::shared_ptr<IWifiChip> wifi_chip_;
+    int interface_version_;
 };
 
 class WifiChipEventCallback : public BnWifiChipEventCallback {
@@ -902,6 +904,89 @@
     }
 }
 
+/**
+ * CreateApOrBridgedApIfaceWithParams for signal ap.
+ */
+TEST_P(WifiChipAidlTest, CreateApOrBridgedApIfaceWithParams_signal_ap) {
+    if (interface_version_ < 3) {
+        GTEST_SKIP() << "CreateApOrBridgedApIfaceWithParams is available as of WifiChip V3";
+    }
+    if (!isConcurrencyTypeSupported(IfaceConcurrencyType::AP)) {
+        GTEST_SKIP() << "AP is not supported";
+    }
+
+    std::shared_ptr<IWifiChip> wifi_chip = getWifiChip(getInstanceName());
+    ASSERT_NE(nullptr, wifi_chip.get());
+    std::shared_ptr<IWifiApIface> wifi_ap_iface = getWifiApOrBridgedApIface(
+            wifi_chip, generateApIfaceParams(IfaceConcurrencyType::AP, false, 0));
+    ASSERT_NE(nullptr, wifi_ap_iface.get());
+}
+
+/**
+ * CreateApOrBridgedApIfaceWithParams for non mlo bridged ap.
+ */
+TEST_P(WifiChipAidlTest, CreateApOrBridgedApIfaceWithParams_non_mlo_bridged_ap) {
+    if (interface_version_ < 3) {
+        GTEST_SKIP() << "CreateApOrBridgedApIfaceWithParams is available as of WifiChip V3";
+    }
+    bool isBridgedSupport = testing::checkSubstringInCommandOutput(
+            "/system/bin/cmd wifi get-softap-supported-features",
+            "wifi_softap_bridged_ap_supported");
+    if (!isBridgedSupport) {
+        GTEST_SKIP() << "Missing Bridged AP support";
+    }
+
+    std::shared_ptr<IWifiChip> wifi_chip = getWifiChip(getInstanceName());
+    ASSERT_NE(nullptr, wifi_chip.get());
+    std::shared_ptr<IWifiApIface> wifi_ap_iface = getWifiApOrBridgedApIface(
+            wifi_chip, generateApIfaceParams(IfaceConcurrencyType::AP_BRIDGED, false, 0));
+    ASSERT_NE(nullptr, wifi_ap_iface.get());
+
+    std::string br_name;
+    std::vector<std::string> instances;
+    bool uses_mlo;
+    EXPECT_TRUE(wifi_ap_iface->getName(&br_name).isOk());
+    EXPECT_TRUE(wifi_ap_iface->getBridgedInstances(&instances).isOk());
+    EXPECT_TRUE(wifi_ap_iface->usesMlo(&uses_mlo).isOk());
+    EXPECT_FALSE(uses_mlo);
+    EXPECT_EQ(instances.size(), 2);
+}
+
+/**
+ * CreateApOrBridgedApIfaceWithParams for mlo bridged ap.
+ */
+TEST_P(WifiChipAidlTest, CreateApOrBridgedApIfaceWithParams_mlo_bridged_ap) {
+    if (interface_version_ < 3) {
+        GTEST_SKIP() << "CreateApOrBridgedApIfaceWithParams is available as of WifiChip V3";
+    }
+    bool isBridgedSupport = testing::checkSubstringInCommandOutput(
+            "/system/bin/cmd wifi get-softap-supported-features",
+            "wifi_softap_bridged_ap_supported");
+    if (!isBridgedSupport) {
+        GTEST_SKIP() << "Missing Bridged AP support";
+    }
+
+    configureChipForConcurrencyType(IfaceConcurrencyType::STA);
+    int32_t features = getChipFeatureSet(wifi_chip_);
+    if (!(features & static_cast<int32_t>(IWifiChip::FeatureSetMask::MLO_SAP))) {
+        GTEST_SKIP() << "MLO_SAP is not supported by vendor.";
+    }
+    std::shared_ptr<IWifiChip> wifi_chip = getWifiChip(getInstanceName());
+    ASSERT_NE(nullptr, wifi_chip.get());
+    std::shared_ptr<IWifiApIface> wifi_ap_iface = getWifiApOrBridgedApIface(
+            wifi_chip, generateApIfaceParams(IfaceConcurrencyType::AP_BRIDGED, true, 0));
+    ASSERT_NE(nullptr, wifi_ap_iface.get());
+
+    std::string br_name;
+    std::vector<std::string> instances;
+    bool uses_mlo;
+    EXPECT_TRUE(wifi_ap_iface->getName(&br_name).isOk());
+    EXPECT_TRUE(wifi_ap_iface->getBridgedInstances(&instances).isOk());
+    EXPECT_TRUE(wifi_ap_iface->usesMlo(&uses_mlo).isOk());
+    EXPECT_TRUE(uses_mlo);
+    EXPECT_EQ(instances.size(), 2);
+}
+
 GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(WifiChipAidlTest);
 INSTANTIATE_TEST_SUITE_P(WifiTest, WifiChipAidlTest,
                          testing::ValuesIn(android::getAidlHalInstanceNames(IWifi::descriptor)),
diff --git a/wifi/aidl/vts/functional/wifi_rtt_controller_aidl_test.cpp b/wifi/aidl/vts/functional/wifi_rtt_controller_aidl_test.cpp
index 1596602..aca1364 100644
--- a/wifi/aidl/vts/functional/wifi_rtt_controller_aidl_test.cpp
+++ b/wifi/aidl/vts/functional/wifi_rtt_controller_aidl_test.cpp
@@ -19,8 +19,10 @@
 #include <VtsCoreUtil.h>
 #include <aidl/Gtest.h>
 #include <aidl/Vintf.h>
+#include <aidl/android/hardware/wifi/Akm.h>
 #include <aidl/android/hardware/wifi/BnWifi.h>
 #include <aidl/android/hardware/wifi/BnWifiRttControllerEventCallback.h>
+#include <aidl/android/hardware/wifi/RttSecureConfig.h>
 #include <android-base/logging.h>
 #include <android/binder_manager.h>
 #include <android/binder_status.h>
@@ -29,6 +31,7 @@
 
 #include "wifi_aidl_test_utils.h"
 
+using aidl::android::hardware::wifi::Akm;
 using aidl::android::hardware::wifi::BnWifiRttControllerEventCallback;
 using aidl::android::hardware::wifi::IWifiRttController;
 using aidl::android::hardware::wifi::RttBw;
@@ -38,6 +41,7 @@
 using aidl::android::hardware::wifi::RttPreamble;
 using aidl::android::hardware::wifi::RttResponder;
 using aidl::android::hardware::wifi::RttResult;
+using aidl::android::hardware::wifi::RttSecureConfig;
 using aidl::android::hardware::wifi::RttType;
 using aidl::android::hardware::wifi::WifiChannelInfo;
 using aidl::android::hardware::wifi::WifiChannelWidthInMhz;
@@ -87,6 +91,15 @@
         return caps;
     }
 
+    int getMostSignificantSetBitMask(int n) {
+        if (n == 0) return 0;
+        int pos = std::numeric_limits<int>::digits - 1;
+        while ((n & (1 << pos)) == 0) {
+            pos--;
+        }
+        return 1 << pos;
+    }
+
     std::shared_ptr<IWifiRttController> wifi_rtt_controller_;
     int interface_version_;
 
@@ -161,6 +174,66 @@
 }
 
 /*
+ * Request80211azNtbSecureRangeMeasurement
+ * Tests the two sided 11az non-trigger based secure ranging - 802.11az NTB FTM protocol.
+ */
+TEST_P(WifiRttControllerAidlTest, Request80211azNtbSecureRangeMeasurement) {
+    if (interface_version_ < 3) {
+        GTEST_SKIP() << "Request80211azNtbRangeMeasurement is available as of RttController V3";
+    }
+
+    RttCapabilities caps = getCapabilities();
+    if (!caps.ntbInitiatorSupported) {
+        GTEST_SKIP() << "Skipping 11az NTB RTT since driver/fw does not support";
+    }
+    if (!caps.secureHeLtfSupported && !caps.rangingFrameProtectionSupported) {
+        GTEST_SKIP() << "Skipping 11az NTB secure RTT since driver/fw does not support";
+    }
+    if (!(caps.akmsSupported & Akm::PASN)) {
+        GTEST_SKIP() << "Skipping 11az NTB secure RTT since driver/fw does not support PASN";
+    }
+    if (!caps.cipherSuitesSupported) {
+        GTEST_SKIP()
+                << "Skipping 11az NTB secure RTT since driver/fw does not support Cipher Suites";
+    }
+
+    RttConfig config;
+    config.addr = {{0x00, 0x01, 0x02, 0x03, 0x04, 0x05}};
+    config.type = RttType::TWO_SIDED_11AZ_NTB_SECURE;
+    config.peer = RttPeerType::AP;
+    config.channel.width = WifiChannelWidthInMhz::WIDTH_80;
+    config.channel.centerFreq = 5180;
+    config.channel.centerFreq0 = 5210;
+    config.channel.centerFreq1 = 0;
+    config.bw = RttBw::BW_20MHZ;
+    config.preamble = RttPreamble::HT;
+    config.mustRequestLci = false;
+    config.mustRequestLcr = false;
+    config.numFramesPerBurst = 8;
+    config.numRetriesPerRttFrame = 0;
+    config.numRetriesPerFtmr = 0;
+    // 11az non-trigger based minimum measurement time in units of 100 microseconds.
+    config.ntbMinMeasurementTime = 2500;
+    // 11az non-trigger based maximum measurement time in units of 10 milliseconds.
+    config.ntbMaxMeasurementTime = 1500;
+    RttSecureConfig secureConfig;
+    // PASN is a must to test secure config; which does not need any password.
+    secureConfig.pasnConfig.baseAkm = Akm::PASN;
+    // Get the best Cipher suite supported by the chip.
+    secureConfig.pasnConfig.cipherSuite = getMostSignificantSetBitMask(caps.cipherSuitesSupported);
+    secureConfig.enableSecureHeLtf = caps.secureHeLtfSupported;
+    secureConfig.enableRangingFrameProtection = caps.rangingFrameProtectionSupported;
+    config.secureConfig = secureConfig;
+
+    int cmdId = 55;
+    std::vector<RttConfig> configs = {config};
+    EXPECT_TRUE(wifi_rtt_controller_->rangeRequest(cmdId, configs).isOk());
+
+    // Sleep for 2 seconds to wait for driver/firmware to complete RTT.
+    sleep(2);
+}
+
+/*
  * Request80211azNtbRangeMeasurement
  * Tests the two sided 11az non-trigger based ranging - 802.11az NTB FTM protocol.
  */
diff --git a/wifi/supplicant/aidl/aidl_api/android.hardware.wifi.supplicant/current/android/hardware/wifi/supplicant/ISupplicantStaIfaceCallback.aidl b/wifi/supplicant/aidl/aidl_api/android.hardware.wifi.supplicant/current/android/hardware/wifi/supplicant/ISupplicantStaIfaceCallback.aidl
index 384ac9a..b0141df 100644
--- a/wifi/supplicant/aidl/aidl_api/android.hardware.wifi.supplicant/current/android/hardware/wifi/supplicant/ISupplicantStaIfaceCallback.aidl
+++ b/wifi/supplicant/aidl/aidl_api/android.hardware.wifi.supplicant/current/android/hardware/wifi/supplicant/ISupplicantStaIfaceCallback.aidl
@@ -84,8 +84,8 @@
   oneway void onPmkSaCacheAdded(in android.hardware.wifi.supplicant.PmkSaCacheData pmkSaData);
   oneway void onUsdPublishStarted(in int cmdId, in int publishId);
   oneway void onUsdSubscribeStarted(in int cmdId, in int subscribeId);
-  oneway void onUsdPublishConfigFailed(in int cmdId);
-  oneway void onUsdSubscribeConfigFailed(in int cmdId);
+  oneway void onUsdPublishConfigFailed(in int cmdId, in android.hardware.wifi.supplicant.ISupplicantStaIfaceCallback.UsdConfigErrorCode errorCode);
+  oneway void onUsdSubscribeConfigFailed(in int cmdId, in android.hardware.wifi.supplicant.ISupplicantStaIfaceCallback.UsdConfigErrorCode errorCode);
   oneway void onUsdPublishTerminated(in int publishId, in android.hardware.wifi.supplicant.UsdTerminateReasonCode reasonCode);
   oneway void onUsdSubscribeTerminated(in int subscribeId, in android.hardware.wifi.supplicant.UsdTerminateReasonCode reasonCode);
   oneway void onUsdPublishReplied(in android.hardware.wifi.supplicant.UsdServiceDiscoveryInfo info);
@@ -97,4 +97,10 @@
     MULTI_LINK_RECONFIG_AP_REMOVAL = 1,
     MULTI_LINK_DYNAMIC_RECONFIG = 2,
   }
+  @Backing(type="int") @VintfStability
+  enum UsdConfigErrorCode {
+    FAILURE_UNKNOWN = 0,
+    FAILURE_TIMEOUT = 1,
+    FAILURE_NOT_AVAILABLE = 2,
+  }
 }
diff --git a/wifi/supplicant/aidl/android/hardware/wifi/supplicant/ISupplicantStaIfaceCallback.aidl b/wifi/supplicant/aidl/android/hardware/wifi/supplicant/ISupplicantStaIfaceCallback.aidl
index 1ee873a..efbd066 100644
--- a/wifi/supplicant/aidl/android/hardware/wifi/supplicant/ISupplicantStaIfaceCallback.aidl
+++ b/wifi/supplicant/aidl/android/hardware/wifi/supplicant/ISupplicantStaIfaceCallback.aidl
@@ -439,12 +439,32 @@
     void onUsdSubscribeStarted(in int cmdId, in int subscribeId);
 
     /**
+     * Error codes returned by |onUsdPublishConfigFailed| and |onUsdSubscribeConfigFailed|.
+     */
+    @VintfStability
+    @Backing(type="int")
+    enum UsdConfigErrorCode {
+        /**
+         * Unknown failure.
+         */
+        FAILURE_UNKNOWN = 0,
+        /**
+         * The requested operation timed out.
+         */
+        FAILURE_TIMEOUT = 1,
+        /**
+         * The requested operation is currently not available.
+         */
+        FAILURE_NOT_AVAILABLE = 2,
+    }
+
+    /**
      * Called in response to |ISupplicantStaIface.startUsdPublish| to indicate that the
      * publish session could not be configured.
      *
      * @param cmdId Identifier for the original request.
      */
-    void onUsdPublishConfigFailed(in int cmdId);
+    void onUsdPublishConfigFailed(in int cmdId, in UsdConfigErrorCode errorCode);
 
     /**
      * Called in response to |ISupplicantStaIface.startUsdSubscribe| to indicate that the
@@ -452,7 +472,7 @@
      *
      * @param cmdId Identifier for the original request.
      */
-    void onUsdSubscribeConfigFailed(in int cmdId);
+    void onUsdSubscribeConfigFailed(in int cmdId, in UsdConfigErrorCode errorCode);
 
     /**
      * Called in response to |ISupplicantStaIface.cancelUsdPublish| to indicate that the session
diff --git a/wifi/supplicant/aidl/vts/functional/supplicant_sta_iface_aidl_test.cpp b/wifi/supplicant/aidl/vts/functional/supplicant_sta_iface_aidl_test.cpp
index da12a82..9d851ba 100644
--- a/wifi/supplicant/aidl/vts/functional/supplicant_sta_iface_aidl_test.cpp
+++ b/wifi/supplicant/aidl/vts/functional/supplicant_sta_iface_aidl_test.cpp
@@ -47,8 +47,12 @@
 using aidl::android::hardware::wifi::supplicant::QosCharacteristics;
 using aidl::android::hardware::wifi::supplicant::QosPolicyScsData;
 using aidl::android::hardware::wifi::supplicant::QosPolicyScsRequestStatus;
+using aidl::android::hardware::wifi::supplicant::UsdBaseConfig;
+using aidl::android::hardware::wifi::supplicant::UsdCapabilities;
 using aidl::android::hardware::wifi::supplicant::UsdMessageInfo;
+using aidl::android::hardware::wifi::supplicant::UsdPublishConfig;
 using aidl::android::hardware::wifi::supplicant::UsdServiceDiscoveryInfo;
+using aidl::android::hardware::wifi::supplicant::UsdSubscribeConfig;
 using aidl::android::hardware::wifi::supplicant::UsdTerminateReasonCode;
 using aidl::android::hardware::wifi::supplicant::WpaDriverCapabilitiesMask;
 using aidl::android::hardware::wifi::supplicant::WpsConfigMethods;
@@ -254,10 +258,12 @@
                                                int32_t /* subscribeId */) override {
         return ndk::ScopedAStatus::ok();
     }
-    ::ndk::ScopedAStatus onUsdPublishConfigFailed(int32_t /* cmdId */) override {
+    ::ndk::ScopedAStatus onUsdPublishConfigFailed(int32_t /* cmdId */,
+                                                  UsdConfigErrorCode /* errorCode */) override {
         return ndk::ScopedAStatus::ok();
     }
-    ::ndk::ScopedAStatus onUsdSubscribeConfigFailed(int32_t /* cmdId */) override {
+    ::ndk::ScopedAStatus onUsdSubscribeConfigFailed(int32_t /* cmdId */,
+                                                    UsdConfigErrorCode /* errorCode */) override {
         return ndk::ScopedAStatus::ok();
     }
     ::ndk::ScopedAStatus onUsdPublishTerminated(int32_t /* publishId */,
@@ -878,6 +884,68 @@
     EXPECT_EQ(1, responseList.size());
 }
 
+/*
+ * Verify that all USD methods check the Service Specific Info (SSI) length
+ * and fail if the provided SSI is too long.
+ */
+TEST_P(SupplicantStaIfaceAidlTest, InvalidUsdServiceSpecificInfo) {
+    if (interface_version_ < 4) {
+        GTEST_SKIP() << "USD is available as of Supplicant V4";
+    }
+
+    UsdCapabilities caps;
+    EXPECT_TRUE(sta_iface_->getUsdCapabilities(&caps).isOk());
+    if (!caps.isUsdPublisherSupported && !caps.isUsdSubscriberSupported) {
+        GTEST_SKIP() << "USD publish and subscribe are not supported";
+    }
+
+    int commandId = 123;
+    std::vector<uint8_t> invalidSsi(caps.maxLocalSsiLengthBytes + 1);
+    UsdBaseConfig invalidBaseConfig;
+    invalidBaseConfig.serviceSpecificInfo = invalidSsi;
+
+    if (caps.isUsdPublisherSupported) {
+        UsdPublishConfig publishConfig;
+        publishConfig.usdBaseConfig = invalidBaseConfig;
+        EXPECT_FALSE(sta_iface_->startUsdPublish(commandId, publishConfig).isOk());
+        EXPECT_FALSE(sta_iface_->updateUsdPublish(commandId, invalidSsi).isOk());
+    }
+
+    if (caps.isUsdSubscriberSupported) {
+        UsdSubscribeConfig subscribeConfig;
+        subscribeConfig.usdBaseConfig = invalidBaseConfig;
+        EXPECT_FALSE(sta_iface_->startUsdSubscribe(commandId, subscribeConfig).isOk());
+    }
+
+    UsdMessageInfo messageInfo;
+    messageInfo.message = invalidSsi;
+    EXPECT_FALSE(sta_iface_->sendUsdMessage(messageInfo).isOk());
+}
+
+/*
+ * Cancel a USD Publish and Subscribe session.
+ */
+TEST_P(SupplicantStaIfaceAidlTest, CancelUsdSession) {
+    if (interface_version_ < 4) {
+        GTEST_SKIP() << "USD is available as of Supplicant V4";
+    }
+
+    UsdCapabilities caps;
+    EXPECT_TRUE(sta_iface_->getUsdCapabilities(&caps).isOk());
+    if (!caps.isUsdPublisherSupported && !caps.isUsdSubscriberSupported) {
+        GTEST_SKIP() << "USD publish and subscribe are not supported";
+    }
+
+    int sessionId = 123;
+    if (caps.isUsdPublisherSupported) {
+        // Method is expected to succeed, even if the session does not exist.
+        EXPECT_TRUE(sta_iface_->cancelUsdPublish(sessionId).isOk());
+    }
+    if (caps.isUsdSubscriberSupported) {
+        EXPECT_TRUE(sta_iface_->cancelUsdSubscribe(sessionId).isOk());
+    }
+}
+
 GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(SupplicantStaIfaceAidlTest);
 INSTANTIATE_TEST_SUITE_P(Supplicant, SupplicantStaIfaceAidlTest,
                          testing::ValuesIn(android::getAidlHalInstanceNames(