From 218b062e8f20233181ecbcca1d627f5d44c4617d Mon Sep 17 00:00:00 2001 From: Abdellatif El Khlifi Date: Fri, 4 Aug 2023 14:33:44 +0100 Subject: arm_ffa: efi: introduce FF-A MM communication Add MM communication support using FF-A transport This feature allows accessing MM partitions services through EFI MM communication protocol. MM partitions such as StandAlonneMM or smm-gateway secure partitions which reside in secure world. An MM shared buffer and a door bell event are used to exchange the data. The data is used by EFI services such as GetVariable()/SetVariable() and copied from the communication buffer to the MM shared buffer. The secure partition is notified about availability of data in the MM shared buffer by an FF-A message (door bell). On such event, MM SP can read the data and updates the MM shared buffer with the response data. The response data is copied back to the communication buffer and consumed by the EFI subsystem. MM communication protocol supports FF-A 64-bit direct messaging. We tested the FF-A MM communication on the Corstone-1000 platform. We ran the UEFI SCT test suite containing EFI setVariable, getVariable and getNextVariable tests which involve FF-A MM communication and all tests are passing with the current changes. We made the SCT test reports (part of the ACS results) public following the latest Corstone-1000 platform software release. Please find the test reports at [1]. [1]: https://gitlab.arm.com/arm-reference-solutions/arm-reference-solutions-test-report/-/tree/master/embedded-a/corstone1000/CORSTONE1000-2023.06/acs_results_fpga.zip Signed-off-by: Abdellatif El Khlifi Tested-by: Gowtham Suresh Kumar Reviewed-by: Simon Glass Cc: Tom Rini Cc: Ilias Apalodimas Cc: Jens Wiklander Reviewed-by: Ilias Apalodimas Reviewed-by: Tom Rini --- include/mm_communication.h | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'include') diff --git a/include/mm_communication.h b/include/mm_communication.h index e65fbde60d0..f38f1a5344b 100644 --- a/include/mm_communication.h +++ b/include/mm_communication.h @@ -6,6 +6,9 @@ * Copyright (c) 2017, Intel Corporation. All rights reserved. * Copyright (C) 2020 Linaro Ltd. * Copyright (C) 2020 Linaro Ltd. + * Copyright 2022-2023 Arm Limited and/or its affiliates + * Authors: + * Abdellatif El Khlifi */ #ifndef _MM_COMMUNICATION_H_ @@ -13,6 +16,11 @@ #include +#if CONFIG_IS_ENABLED(ARM_FFA_TRANSPORT) +/* MM service UUID string (big-endian format). This UUID is common across all MM SPs */ +#define MM_SP_UUID "33d532ed-e699-0942-c09c-a798d9cd722d" +#endif + /* * Interface to the pseudo Trusted Application (TA), which provides a * communication channel with the Standalone MM (Management Mode) @@ -248,4 +256,13 @@ struct smm_variable_var_check_property { u16 name[]; }; +#if CONFIG_IS_ENABLED(ARM_FFA_TRANSPORT) +/* supported MM transports */ +enum mm_comms_select { + MM_COMMS_UNDEFINED, + MM_COMMS_FFA, + MM_COMMS_OPTEE +}; +#endif + #endif /* _MM_COMMUNICATION_H_ */ -- cgit v1.2.3