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Introduce qcomtee_object, which represents an object in both QTEE and the kernel. QTEE clients can invoke an instance of qcomtee_object to access QTEE services. If this invocation produces a new object in QTEE, an instance of qcomtee_object will be returned. Similarly, QTEE can request services from by issuing a callback request, which invokes an instance of qcomtee_object. Implement initial support for exporting qcomtee_object to userspace and QTEE, enabling the invocation of objects hosted in QTEE and userspace through the TEE subsystem. Tested-by: Neil Armstrong <neil.armstrong@linaro.org> Tested-by: Harshal Dev <quic_hdev@quicinc.com> Acked-by: Sumit Garg <sumit.garg@oss.qualcomm.com> Signed-off-by: Amirreza Zarrabi <amirreza.zarrabi@oss.qualcomm.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>