[PATCH v3 0/4] introduce Arm FF-A support

Abdellatif El Khlifi
2022-08-01T17:21:20Z

This new version of the patchset provides improvements to the FF-A driver design.

The FF-A driver is a discoverable bus and brings these new features:

* support for the 64-bit x0-x17 registers in SMC arguments passing
* align with the FF-A kernel driver interfaces
* make the driver EFI independent

This patchset will be followed by further updates (work in progress):

* discover MM partitions at runtime
* align with the FF-A kernel driver error handling
* align Sandbox driver and tests with the new interfaces

Changelog:
===============

v3:

* port x0-x17 registers support from linux kernel as defined by SMCCCv1.2
* align the interfaces of the u-boot FF-A driver with those in the linux FF-A driver
* remove the FF-A helper layer
* make the u-boot FF-A driver independent from EFI
* provide an optional config that enables copying the driver data to EFI runtime section at ExitBootServices service
* use 64-bit version of FFA_RXTX_MAP, FFA_MSG_SEND_DIRECT_{REQ, RESP}
* update armffa command with the new driver interfaces

v2 [2]:

* make FF-A bus discoverable using device_{bind, probe} APIs
* remove device tree support

v1 [1]:

* introduce FF-A bus driver with device tree support
* introduce armffa command
* introduce FF-A Sandbox driver
* add FF-A Sandbox test cases
* introduce FF-A MM communication

Cheers,
Abdellatif

[1]: https://lore.kernel.org/all/20220329151659.16894-1-abdellatif.elkhlifi@arm.com/
[2]: https://lore.kernel.org/all/20220415122803.16666-1-abdellatif.elkhlifi@arm.com/

Cc: Tom Rini <trini@konsulko.com>
Cc: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Cc: Jens Wiklander <jens.wiklander@linaro.org>
Cc: Achin Gupta <achin.gupta@arm.com>
Cc: Vishnu Banavath <vishnu.banavath@arm.com>
Cc: Xueliang Zhong <Xueliang.Zhong@arm.com>

Abdellatif El Khlifi (4):
arm64: smccc: add Xn registers support used by SMC calls
arm64: smccc: clear the Xn registers after SMC calls
arm_ffa: introduce Arm FF-A low-level driver
arm_ffa: introduce armffa command

MAINTAINERS | 7 +
arch/arm/cpu/armv8/smccc-call.S | 73 ++
arch/arm/lib/asm-offsets.c | 13 +
cmd/Kconfig | 10 +
cmd/Makefile | 2 +
cmd/armffa.c | 246 ++++
common/board_r.c | 7 +
drivers/Kconfig | 2 +
drivers/Makefile | 1 +
drivers/arm-ffa/Kconfig | 34 +
drivers/arm-ffa/Makefile | 7 +
drivers/arm-ffa/arm-ffa-uclass.c | 16 +
drivers/arm-ffa/arm_ffa_prv.h | 219 ++++
drivers/arm-ffa/core.c | 1338 ++++++++++++++++++++
drivers/arm-ffa/efi_ffa_runtime_data_mgr.c | 94 ++
include/arm_ffa.h | 132 ++
include/dm/uclass-id.h | 1 +
include/linux/arm-smccc.h | 43 +
include/uuid.h | 8 +
lib/efi_loader/efi_boottime.c | 17 +
lib/uuid.c | 65 +
21 files changed, 2335 insertions(+)
create mode 100644 cmd/armffa.c
create mode 100644 drivers/arm-ffa/Kconfig
create mode 100644 drivers/arm-ffa/Makefile
create mode 100644 drivers/arm-ffa/arm-ffa-uclass.c
create mode 100644 drivers/arm-ffa/arm_ffa_prv.h
create mode 100644 drivers/arm-ffa/core.c
create mode 100644 drivers/arm-ffa/efi_ffa_runtime_data_mgr.c
create mode 100644 include/arm_ffa.h

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2.17.1