Hi all,

This adds supports for the OP-TEE driver to communicate with secure world using FF-A [1] as transport.

These patches are based on the FF-A v7 patch set by Sudeep Holla [2] [3].

There is one change to the TEE subsystem with "tee: add sec_world_id to struct tee_shm" to add support for holding globally unique handle assigned by the FF-A. This is a field that I believe could useful for the AMDTEE driver too.

For communication the OP-TEE message protocol is still used, but with a new type of memory reference, struct optee_msg_param_fmem, to carry the information needed by FF-A. The OP-TEE driver is refactored internally with to sets of callbacks, one for the old SMC based communication and another set with FF-A as transport.

There is also a difference in how the drivers are instantiated. With the SMC based transport we have a platform driver, module_platform_driver(), today which we're keeping as is for this configuration. In a FF-A system we have a FF-A driver, module_ffa_driver(), instead.

The OP-TEE driver can be compiled for both targets at the same time and it's up to runtime configuration (device tree or ACPI) to decide how it's initialized.

Thanks, Jens

[1] https://developer.arm.com/documentation/den0077/latest [2] https://lore.kernel.org/linux-arm-kernel/20210521151033.181846-1-sudeep.holl... [3] git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux.git v5.13/ffa

v1->v2: - Rebased to the FF-A v7 patch - Fixed a couple of reports from kernel test robot lkp@intel.com

Jens Wiklander (5): tee: add sec_world_id to struct tee_shm optee: simplify optee_release() optee: refactor driver with internal callbacks optee: add a FF-A memory pool optee: add FF-A support

drivers/tee/optee/call.c | 325 +++++++++++--- drivers/tee/optee/core.c | 689 ++++++++++++++++++++++++++---- drivers/tee/optee/optee_ffa.h | 153 +++++++ drivers/tee/optee/optee_msg.h | 27 +- drivers/tee/optee/optee_private.h | 88 +++- drivers/tee/optee/rpc.c | 137 +++++- drivers/tee/optee/shm_pool.c | 65 ++- drivers/tee/optee/shm_pool.h | 1 + include/linux/tee_drv.h | 7 +- 9 files changed, 1326 insertions(+), 166 deletions(-) create mode 100644 drivers/tee/optee/optee_ffa.h