diff options
Diffstat (limited to 'drivers/tee/optee/optee_smc.h')
| -rw-r--r-- | drivers/tee/optee/optee_smc.h | 48 |
1 files changed, 42 insertions, 6 deletions
diff --git a/drivers/tee/optee/optee_smc.h b/drivers/tee/optee/optee_smc.h index d44a6ae994f8..c60896cf71cb 100644 --- a/drivers/tee/optee/optee_smc.h +++ b/drivers/tee/optee/optee_smc.h @@ -107,14 +107,22 @@ struct optee_smc_call_get_os_revision_result { /* * Call with struct optee_msg_arg as argument * - * When calling this function normal world has a few responsibilities: + * When called with OPTEE_SMC_CALL_WITH_RPC_ARG or + * OPTEE_SMC_CALL_WITH_REGD_ARG in a0 there is one RPC struct optee_msg_arg + * following after the first struct optee_msg_arg. The RPC struct + * optee_msg_arg has reserved space for the number of RPC parameters as + * returned by OPTEE_SMC_EXCHANGE_CAPABILITIES. + * + * When calling these functions, normal world has a few responsibilities: * 1. It must be able to handle eventual RPCs * 2. Non-secure interrupts should not be masked * 3. If asynchronous notifications has been negotiated successfully, then - * asynchronous notifications should be unmasked during this call. + * the interrupt for asynchronous notifications should be unmasked + * during this call. * - * Call register usage: - * a0 SMC Function ID, OPTEE_SMC*CALL_WITH_ARG + * Call register usage, OPTEE_SMC_CALL_WITH_ARG and + * OPTEE_SMC_CALL_WITH_RPC_ARG: + * a0 SMC Function ID, OPTEE_SMC_CALL_WITH_ARG or OPTEE_SMC_CALL_WITH_RPC_ARG * a1 Upper 32 bits of a 64-bit physical pointer to a struct optee_msg_arg * a2 Lower 32 bits of a 64-bit physical pointer to a struct optee_msg_arg * a3 Cache settings, not used if physical pointer is in a predefined shared @@ -122,6 +130,15 @@ struct optee_smc_call_get_os_revision_result { * a4-6 Not used * a7 Hypervisor Client ID register * + * Call register usage, OPTEE_SMC_CALL_WITH_REGD_ARG: + * a0 SMC Function ID, OPTEE_SMC_CALL_WITH_REGD_ARG + * a1 Upper 32 bits of a 64-bit shared memory cookie + * a2 Lower 32 bits of a 64-bit shared memory cookie + * a3 Offset of the struct optee_msg_arg in the shared memory with the + * supplied cookie + * a4-6 Not used + * a7 Hypervisor Client ID register + * * Normal return register usage: * a0 Return value, OPTEE_SMC_RETURN_* * a1-3 Not used @@ -154,6 +171,10 @@ struct optee_smc_call_get_os_revision_result { #define OPTEE_SMC_FUNCID_CALL_WITH_ARG OPTEE_MSG_FUNCID_CALL_WITH_ARG #define OPTEE_SMC_CALL_WITH_ARG \ OPTEE_SMC_STD_CALL_VAL(OPTEE_SMC_FUNCID_CALL_WITH_ARG) +#define OPTEE_SMC_CALL_WITH_RPC_ARG \ + OPTEE_SMC_STD_CALL_VAL(OPTEE_SMC_FUNCID_CALL_WITH_RPC_ARG) +#define OPTEE_SMC_CALL_WITH_REGD_ARG \ + OPTEE_SMC_STD_CALL_VAL(OPTEE_SMC_FUNCID_CALL_WITH_REGD_ARG) /* * Get Shared Memory Config @@ -202,7 +223,11 @@ struct optee_smc_get_shm_config_result { * a0 OPTEE_SMC_RETURN_OK * a1 bitfield of secure world capabilities OPTEE_SMC_SEC_CAP_* * a2 The maximum secure world notification number - * a3-7 Preserved + * a3 Bit[7:0]: Number of parameters needed for RPC to be supplied + * as the second MSG arg struct for + * OPTEE_SMC_CALL_WITH_ARG + * Bit[31:8]: Reserved (MBZ) + * a4-7 Preserved * * Error return register usage: * a0 OPTEE_SMC_RETURN_ENOTAVAIL, can't use the capabilities from normal world @@ -227,6 +252,8 @@ struct optee_smc_get_shm_config_result { #define OPTEE_SMC_SEC_CAP_MEMREF_NULL BIT(4) /* Secure world supports asynchronous notification of normal world */ #define OPTEE_SMC_SEC_CAP_ASYNC_NOTIF BIT(5) +/* Secure world supports pre-allocating RPC arg struct */ +#define OPTEE_SMC_SEC_CAP_RPC_ARG BIT(6) #define OPTEE_SMC_FUNCID_EXCHANGE_CAPABILITIES 9 #define OPTEE_SMC_EXCHANGE_CAPABILITIES \ @@ -236,7 +263,7 @@ struct optee_smc_exchange_capabilities_result { unsigned long status; unsigned long capabilities; unsigned long max_notif_value; - unsigned long reserved0; + unsigned long data; }; /* @@ -358,6 +385,9 @@ struct optee_smc_disable_shm_cache_result { * should be called until all pended values have been retrieved. When a * value is retrieved, it's cleared from the record in secure world. * + * It is expected that this function is called from an interrupt handler + * in normal world. + * * Call requests usage: * a0 SMC Function ID, OPTEE_SMC_GET_ASYNC_NOTIF_VALUE * a1-6 Not used @@ -390,6 +420,12 @@ struct optee_smc_disable_shm_cache_result { #define OPTEE_SMC_GET_ASYNC_NOTIF_VALUE \ OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_GET_ASYNC_NOTIF_VALUE) +/* See OPTEE_SMC_CALL_WITH_RPC_ARG above */ +#define OPTEE_SMC_FUNCID_CALL_WITH_RPC_ARG 18 + +/* See OPTEE_SMC_CALL_WITH_REGD_ARG above */ +#define OPTEE_SMC_FUNCID_CALL_WITH_REGD_ARG 19 + /* * Resume from RPC (for example after processing a foreign interrupt) * |