Hi all,
I'm looking for any advice/clue to help me to progress on enabling
TEE-base EFI Runtime Variable Service on TI a j784s4 platforms.
I basically followed the steps described in u-boot documentation [1],
I enabled some debugging messages but I think I'm at the point that
the problem might be in the StandaloneMM application, and I'm not sure
how to debug it.
What I see is that when I run the tee-supplicant daemon, it looks like
the tee_client_open_session() call loops forever and the tee_stmm_efi
driver never ends to probe.
With debug enabled I got the following messages.
# tee-supplicant
D/TC:? 0 tee_ta_init_session_with_context:557 Re-open trusted service
7011a688-ddde-4053-a5a9-7b3c4ddf13b8
D/TC:? 0 load_stmm:297 stmm load address 0x40004000
D/TC:? 0 spm_handle_scall:859 Received FFA version
D/TC:? 0 spm_handle_scall:867 Received FFA direct request
D/TC:? 0 spm_handle_scall:867 Received FFA direct request
D/TC:? 0 spm_handle_scall:867 Received FFA direct request
D/TC:? 0 spm_handle_scall:867 Received FFA direct request
D/TC:? 0 spm_handle_scall:867 Received FFA direct request
D/TC:? 0 spm_handle_scall:867 Received FFA direct request
D/TC:? 0 spm_handle_scall:867 Received FFA direct request
D/TC:? 0 spm_handle_scall:867 Received FFA direct request
D/TC:? 0 spm_handle_scall:867 Received FFA direct request
D/TC:? 0 spm_handle_scall:867 Received FFA direct request
D/TC:? 0 spm_handle_scall:867 Received FFA direct request
D/TC:? 0 spm_handle_scall:867 Received FFA direct request
D/TC:? 0 spm_handle_scall:867 Received FFA direct request
D/TC:? 0 spm_handle_scall:867 Received FFA direct request
D/TC:? 0 spm_handle_scall:867 Received FFA direct request
D/TC:? 0 spm_handle_scall:867 Received FFA direct request
And tracing the function calls gives me that:
tee_stmm_efi_probe() {
tee_client_open_context() {
optee_get_version() {
tee_get_drvdata(); (ret=0xffff000002e55800)
} (ret=0xd)
tee_ctx_match(); (ret=0x1)
optee_smc_open() {
tee_get_drvdata(); (ret=0xffff000002e55800)
optee_open() {
tee_get_drvdata(); (ret=0xffff000002e55800)
} (ret=0x0)
} (ret=0x0)
} (ret=0xffff000004e71c80)
tee_client_open_session() {
optee_open_session() {
tee_get_drvdata(); (ret=0xffff000002e55800)
optee_get_msg_arg() {
tee_get_drvdata(); (ret=0xffff000002e55800)
tee_shm_get_va(); (ret=0xffff000002909000)
} (ret=0xffff000002909000)
tee_session_calc_client_uuid(); (ret=0x0)
optee_to_msg_param(); (ret=0x0)
optee_smc_do_call_with_arg() {
tee_get_drvdata(); (ret=0xffff000002e55800)
tee_shm_get_va(); (ret=0xffff000002909000)
tee_shm_get_va(); (ret=0xffff000002909060)
optee_cq_wait_init(); (ret=0xffff000002e55910)
optee_smccc_smc(); (ret=0xffff0004)
tee_get_drvdata(); (ret=0xffff000002e55800)
optee_smccc_smc(); (ret=0xffff0004)
tee_get_drvdata(); (ret=0xffff000002e55800)
optee_smccc_smc(); (ret=0xffff0004)
tee_get_drvdata(); (ret=0xffff000002e55800)
optee_smccc_smc(); (ret=0xffff0004)
tee_get_drvdata(); (ret=0xffff000002e55800)
optee_smccc_smc(); (ret=0xffff0004)
... continues sending this forever ...
... Hit ^C to stop recording ...
tee_get_drvdata(); (ret=0xffff000002e55800)
optee_smccc_smc() {
[1] https://docs.u-boot.org/en/latest/develop/uefi/uefi.html#using-op-tee-for-efi-variables
Thanks in advance,
Enric
