[PATCH v16 09/10] arm_ffa: efi: introduce FF-A MM communication

[Gowtham Suresh Kumar]

Hi Ilias,

On Thu, Jul 27, 2023 at 12:58:57PM +0300, Ilias Apalodimas wrote:
> On Wed, Jul 26, 2023 at 10:45:02AM +0100, Abdellatif El Khlifi wrote:
> > 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 <abdellatif.elkhlifi at arm.com>
> > Tested-by: Gowtham Suresh Kumar <gowtham.sureshkumar at arm.com>
> 
> Is there a public record of thise tested-by?  If not please don't inject
> them like this or have Gowtham respond on the mailing list 

Yes, 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 release.

Please find the test reports at [1].

Kind regards,
Gowtham Suresh Kumar

[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