virtio-tee: Reserve device ID 46 for TEE device

In a virtual environment, an application running in guest VM may want
to delegate security sensitive tasks to a Trusted Application (TA)
running within a Trusted Execution Environment (TEE). A TEE is a trusted
OS running in some secure environment, for example, TrustZone on ARM
CPUs, or a separate secure co-processor etc.

A virtual TEE device emulates a TEE within a guest VM. Such a virtual
TEE device supports multiple operations such as:

VIRTIO_TEE_CMD_OPEN_DEVICE – Open a communication channel with virtio
                             TEE device.
VIRTIO_TEE_CMD_CLOSE_DEVICE – Close communication channel with virtio
                              TEE device.
VIRTIO_TEE_CMD_GET_VERSION – Get version of virtio TEE.
VIRTIO_TEE_CMD_OPEN_SESSION – Open a session to communicate with
                              trusted application running in TEE.
VIRTIO_TEE_CMD_CLOSE_SESSION – Close a session to end communication
                               with trusted application running in TEE.
VIRTIO_TEE_CMD_INVOKE_FUNC – Invoke a command or function in trusted
                             application running in TEE.
VIRTIO_TEE_CMD_CANCEL_REQ – Cancel an ongoing command within TEE.
VIRTIO_TEE_CMD_REGISTER_MEM - Register shared memory with TEE.
VIRTIO_TEE_CMD_UNREGISTER_MEM - Unregister shared memory from TEE.

We would like to reserve device ID 46 for Virtio-TEE device.

Fixes: #175

Signed-off-by: Jeshwanth Kumar <jeshwanthkumar.nk@amd.com>
Reviewed-by: Rijo Thomas <Rijo-john.Thomas@amd.com>
Reviewed-by: Parav Pandit <parav@nvidia.com>
Acked-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>

content.tex

@@ -739,6 +739,8 @@ \chapter{Device Types}\label{sec:Device Types}
 \hline
 45         &   SPI master \\
 \hline
+46         &   TEE device \\
+\hline
 \end{tabular}
 
 Some of the devices above are unspecified by this document,