'-------------------------------------------------------------------------------
' Copyright (c) 2024, Arm Limited and Contributors. All rights reserved.
'
' SPDX-License-Identifier: BSD-3-Clause
'
'-------------------------------------------------------------------------------

@startuml
package "Normal World" {
  package "EL-1" {
    [arm-ffa-user] as driver
    [Linux kernel] as kernel
  }
  package "EL-0" {
    [shell]
    [xtest]
  }
}
package "Secure World" {
  package "SEL-0" {
    [Test SP] as sp
  }
  package "SEL-1" {
    [OP-TEE kernel] as optee
  }
}

[shell] -> driver: Load driver
[shell] -> [xtest] : Call xtest -t ffa_spmc
[xtest] -> driver: Open
driver -> kernel: Send FF-A message
kernel -> optee: Forward FF-A message
optee -> sp: Forward FF-A message
@enduml