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arm_ffa: introduce sandbox FF-A support

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Emulate Secure World's FF-A ABIs and allow testing U-Boot FF-A support

Features of the sandbox FF-A support:

- Introduce an FF-A emulator
- Introduce an FF-A device driver for FF-A comms with emulated Secure World
- Provides test methods allowing to read the status of the inspected ABIs

The sandbox FF-A emulator supports only 64-bit direct messaging.

Signed-off-by: Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Cc: Tom Rini <trini@konsulko.com>
Cc: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Cc: Jens Wiklander <jens.wiklander@linaro.org>
Cc: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Abdellatif El Khlifi
2023-08-04 14:33:41 +01:00
committed by Tom Rini
parent 39d383bdac
commit a09852d862
15 changed files with 1081 additions and 22 deletions
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19
doc/arch/arm64.ffa.rst
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@@ -33,6 +33,10 @@ The U-Boot FF-A support provides the following parts:
- A Uclass driver providing generic FF-A methods.
- An Arm FF-A device driver providing Arm-specific methods and reusing the Uclass methods.
- A sandbox emulator for Arm FF-A, emulates the FF-A side of the Secure World and provides
FF-A ABIs inspection methods.
- An FF-A sandbox device driver for FF-A communication with the emulated Secure World.
The driver leverages the FF-A Uclass to establish FF-A communication.
FF-A and SMC specifications
-------------------------------------------
@@ -62,6 +66,7 @@ CONFIG_ARM_FFA_TRANSPORT
Enables the FF-A support. Turn this on if you want to use FF-A
communication.
When using an Arm 64-bit platform, the Arm FF-A driver will be used.
When using sandbox, the sandbox FF-A emulator and FF-A sandbox driver will be used.
FF-A ABIs under the hood
---------------------------------------
@@ -98,10 +103,8 @@ architecture features including FF-A bus.
Class Index Probed Driver Name
-----------------------------------------------------------
...
firmware 0 [ + ] psci |-- psci
ffa 0 [ ] arm_ffa | `-- arm_ffa
...
The PSCI driver is bound to the PSCI device and when probed it tries to discover
the architecture features by calling a callback the features drivers provide.
@@ -203,6 +206,18 @@ The following features are provided:
- FF-A bus can be compiled and used without EFI
Relationship between the sandbox emulator and the FF-A device
---------------------------------------------------------------
::
=> dm tree
Class Index Probed Driver Name
-----------------------------------------------------------
ffa_emul 0 [ + ] sandbox_ffa_emul `-- arm-ffa-emul
ffa 0 [ ] sandbox_arm_ffa `-- sandbox-arm-ffa
Example of boot logs with FF-A enabled
--------------------------------------

1
doc/arch/sandbox/sandbox.rst
View File

@@ -200,6 +200,7 @@ Supported Drivers
U-Boot sandbox supports these emulations:
- Arm FF-A
- Block devices
- Chrome OS EC
- GPIO