On Tue, Apr 26, 2022 at 9:33 AM Jens Wiklander
<jens.wiklander@linaro.org> wrote:
>
> Hi all,
>
> This patchset optimizes handling of the argument struct passed to
> call_with_arg when doing a yielding call to OP-TEE.
>
> Prior to this was this struct allocated before the yielding call and
> then freed after it had returned. In case many calls are made in succession
> this results in quite a bit of unnecessary allocte/free and possibly also
> switching back and forth to secure work in order to register if needed.
>
> Another optimization handles the way the argument struct needed to do RPC
> is passed. Please see the patch "optee: add OPTEE_SMC_CALL_WITH_RPC_ARG and
> OPTEE_SMC_CALL_WITH_REGD_ARG" for details.
>
> Thanks,
> Jens
>
> v1->v2:
> * Split out a separate commit "optee: rename rpc_arg_count to
> rpc_param_count"
> * Check optee->rpc_param_count before calling optee_disable_shm_cache().
> * Mention OPTEE_SMC_CALL_WITH_REGD_ARG in commit message.
>
> v2->v3:
> * Applied Sumit's R-B to "optee: rename rpc_arg_count to rpc_param_count"
> and "optee: add OPTEE_SMC_CALL_WITH_RPC_ARG and OPTEE_SMC_CALL_WITH_REGD_ARG"
> * Fixed some review comments to "optee: add OPTEE_SMC_CALL_WITH_RPC_ARG and
> OPTEE_SMC_CALL_WITH_REGD_ARG"
> * Rebased on v5.18-rc1
>
> v3->v4:
> * Updated "optee: cache argument shared memory structs" to work with older
> versions of the SMC-ABI when using dynamic shared memory.
>
> 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(-)
>
> --
> 2.31.1
>
I've picked this up now.
Thanks,
Jens