u-boot.git/include/mm_communication.h, branch v2026.01

arm_ffa: efi: introduce FF-A MM communication

2023-08-08T14:22:03+00:00

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

Revert "Merge branch '2023-07-24-introduce-FF-A-suppport'"

2023-07-24T23:51:05+00:00

This reverts commit d927d1a80843e1c3e2a3f0b8f6150790bef83da1, reversing
changes made to c07ad9520c6190070513016fdb495d4703a4a853.

These changes do not pass CI currently.

Signed-off-by: Tom Rini

arm_ffa: efi: introduce FF-A MM communication

2023-07-24T19:30:03+00:00

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.

Signed-off-by: Abdellatif El Khlifi 
Tested-by: Gowtham Suresh Kumar 
Reviewed-by: Simon Glass 
Cc: Tom Rini 
Cc: Ilias Apalodimas 
Cc: Jens Wiklander

lib/efi_loader: fix ABI in efi_mm_communicate_header

2020-11-29T04:18:37+00:00

Pack struct efi_mm_communicate_header as done in EDK2 as seen in
release 201808 [1]. If not packed sizeof() for the structure adds
4 additional bytes on 32bit targets which breaks the ABI.

Link: [1] https://github.com/tianocore/edk2/blob/edk2-stable201808/MdePkg/Include/Protocol/MmCommunication.h#L21
Fixes: 23a397d2e2fb ("efi_loader: Add headers for EDK2 StandAloneMM communication")
Signed-off-by: Etienne Carriere 
Reviewed-by: Ilias Apalodimas

efi_loader: Rename and correct values for ARM_SMC_MM_*

2020-07-22T10:32:41+00:00

Instead of adding the definition for the specific MM SVC used in
StandAloneMM we added the one used in the standard SMC calls.
So change the value from -4 to -5 to match the correct one defined in
EDK2 and rename them to avoid future confusion

Fixes 23a397d2e2fb: ("efi_loader: Add headers for EDK2 StandAloneMM communication")
Signed-off-by: Ilias Apalodimas 
Reviewed-by: Heinrich Schuchardt

efi_loader: display RO attribute with TEE-backed variables

2020-07-16T10:37:02+00:00

A previous commit adds support for displaying variables RO flag.
Let's add it on the TEE backed variable storage as well.

Signed-off-by: Ilias Apalodimas 
Reviewed-by: Heinrich Schuchardt

efi_loader: Add headers for EDK2 StandAloneMM communication

2020-05-17T19:59:53+00:00

In Arm devices OP-TEE has the ability to run StandAloneMM (from EDK2)
in a separate partition and handle UEFI variables.
A following patch introduces this functionality.

Add the headers needed for OP-TEE <--> StandAloneMM communication

Signed-off-by: Sughosh Ganu 
Signed-off-by: Ilias Apalodimas 
Reviewed-by: Heinrich Schuchardt