docs/components/rmm-el3-comms-spec.rst

1 RMM-EL3 Communication interface
4 This document defines the communication interface between RMM and EL3.
5 There are two parts in this interface: the boot interface and the runtime
6 interface.
9 R-EL2 for the first time after boot. The cold boot interface defines the ABI
10 for the cold boot path and the warm boot interface defines the same for the
13 The RMM-EL3 runtime interface defines the ABI for EL3 services which can be
26 RMM-EL3 runtime interface.
178 warm boot by any PE should not enter RMM using the warm boot interface.
217 This section defines the RMM-EL3 runtime interface which specifies the ABI for
220 important to note that RMM is allowed to invoke EL3-RMM runtime interface
225 If the interface requires the use of memory, then the memory references should
226 be within the shared buffer communicated as part of the boot interface. See
281 This call is the only function currently in RMM-EL3 runtime interface which
525 RMM-EL3 interface, for a given version. This command is helpful when there are
535 This command is available from v0.4 of the RMM-EL3 interface.
538 v0.4 of the interface:
600    ``E_RMM_UNK``,"if the SMC is not present, if interface version is <0.4"
621 The RMM-EL3 interface for this command is modeled as two separate queues, one for signing requests
679    ``E_RMM_UNK``,"if the SMC is not present, if interface version is <0.4"
690 This command is available from v0.8 of the RMM-EL3 interface.
737 command is available from v0.6 of the RMM-EL3 interface.
798 …``E_RMM_AGAIN``,Returned only for non-blocking mode. IDE-KM interface is busy or request is full. …
806 Device Assignment flow. This command is available from v0.6 of the RMM-EL3 interface.
859 …``E_RMM_AGAIN``,Returned only for non-blocking mode. IDE-KM interface is busy or request is full. …
867 available from v0.6 of the RMM-EL3 interface.
920 …``E_RMM_AGAIN``,Returned only for non-blocking mode. IDE-KM interface is busy or request is full. …
928 Device Assignment flow. This command is available from v0.6 of the RMM-EL3 interface.
998 This command is available from v0.7 of the RMM-EL3 interface.
1041    ``E_RMM_UNK``,"if the SMC is not present, if interface version is <0.7"