Hello arm-soc maintainers,

Please pull these patches which improves performance when communicating with OP-TEE in the secure world. A cache of argument structs is implemented to minimize the number of alloc/free and possibly also register/unregister of these buffers in the secure world. This boosts the performance in particular in a FF-A configuration. It should also save a bit of shared memory since each multiple a physical page now can hold multiple argument structs, instead of one page per struct as it was before.

The OP-TEE SMC ABI is also extended to pass an argument struct needed for RPC together with the primary argument struct, in a manner similar the OP-TEE FF-A ABI.

Thanks, Jens

The following changes since commit 3123109284176b1532874591f7c81f3837bbdc17:

Linux 5.18-rc1 (2022-04-03 14:08:21 -0700)

are available in the Git repository at:

https://git.linaro.org/people/jens.wiklander/linux-tee.git tags/optee-rpc-arg-for-v5.19

for you to fetch changes up to 5b4018b959149eb5b5f3004fc0339674af67516b:

optee: cache argument shared memory structs (2022-04-25 21:13:05 +0200)

---------------------------------------------------------------- OP-TEE RPC argument cache

Adds caching of the OP-TEE argument structure used to pass request to secure world. This reduces quite a bit of unnecessary alloc/free and possibly switching back and forth to secure work in order to register the buffers in some configurations, most notably FF-A.

---------------------------------------------------------------- Jens Wiklander (4): optee: rename rpc_arg_count to rpc_param_count optee: add OPTEE_SMC_CALL_WITH_RPC_ARG and OPTEE_SMC_CALL_WITH_REGD_ARG optee: add FF-A capability OPTEE_FFA_SEC_CAP_ARG_OFFSET optee: cache argument shared memory structs

drivers/tee/optee/call.c | 238 +++++++++++++++++++++++++++++++------- drivers/tee/optee/core.c | 1 + drivers/tee/optee/ffa_abi.c | 36 ++++-- drivers/tee/optee/optee_ffa.h | 12 +- drivers/tee/optee/optee_private.h | 31 ++++- drivers/tee/optee/optee_smc.h | 48 +++++++- drivers/tee/optee/smc_abi.c | 197 +++++++++++++++++++++++++------ 7 files changed, 461 insertions(+), 102 deletions(-)