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 v4 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/20210212154614.38604-1-sudeep.ho...@arm.com/ [3] git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux.git v5.11/ffa Jens Wiklander (6): tee: add sec_world_id to struct tee_shm optee: simplify optee_release() optee: sync optee_msg.h and optee_rpc_cmd.h optee: refactor driver with internal callbacks optee: add a FF-A memory pool optee: add FF-A support drivers/tee/optee/call.c | 327 +++++++++++--- drivers/tee/optee/core.c | 698 +++++++++++++++++++++++++----- drivers/tee/optee/optee_ffa.h | 153 +++++++ drivers/tee/optee/optee_msg.h | 168 ++----- drivers/tee/optee/optee_private.h | 88 +++- drivers/tee/optee/optee_rpc_cmd.h | 333 ++++++++++++++ drivers/tee/optee/rpc.c | 169 +++++++- drivers/tee/optee/shm_pool.c | 65 ++- drivers/tee/optee/shm_pool.h | 1 + include/linux/tee_drv.h | 7 +- 10 files changed, 1685 insertions(+), 324 deletions(-) create mode 100644 drivers/tee/optee/optee_ffa.h create mode 100644 drivers/tee/optee/optee_rpc_cmd.h base-commit: 31ef391700953fb59ea8755ea38c6085bdec380e -- 2.25.1
