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4 AMD-TEE (AMD's Trusted Execution Environment)
7 The AMD-TEE driver handles the communication with AMD's TEE environment. The
8 TEE environment is provided by AMD Secure Processor.
10 The AMD Secure Processor (formerly called Platform Security Processor or PSP)
16 The following picture shows a high level overview of AMD-TEE::
21  User space            (Kernel space)        |    AMD Secure Processor (PSP)
36  | TEE     |           | TEE       | AMD-TEE |         | AMD-TEE  |
44 At the lowest level (in x86), the AMD Secure Processor (ASP) driver uses the
47 the secure processor and return results to AMD-TEE driver. The interface
48 between AMD-TEE driver and AMD Secure Processor driver can be found in [1].
50 The AMD-TEE driver packages the command buffer payload for processing in TEE.
53 The TEE commands supported by AMD-TEE Trusted OS are:
64 AMD-TEE Trusted OS is the firmware running on AMD Secure Processor.
66 The AMD-TEE driver registers itself with TEE subsystem and implements the
76 cancel_req driver callback is not supported by AMD-TEE.
79 talk to AMD's TEE. AMD's TEE provides a secure environment for loading, opening