diff options
| author | Jens Wiklander <jens.wiklander@linaro.org> | 2022-01-12 19:06:32 +0300 |
|---|---|---|
| committer | Jens Wiklander <jens.wiklander@linaro.org> | 2022-04-13 08:37:48 +0300 |
| commit | a639b2b18a240d497109631d48016b620fb354f9 (patch) | |
| tree | b0165ae69d7af01afcccffe3257d1cca9c76a2c1 /drivers/tee/optee/optee_ffa.h | |
| parent | ed8faf6c8f8c1f7e9ee88342a915ce5f09ca9736 (diff) | |
| download | linux-a639b2b18a240d497109631d48016b620fb354f9.tar.xz | |
optee: add FF-A capability OPTEE_FFA_SEC_CAP_ARG_OFFSET
Adds the secure capability OPTEE_FFA_SEC_CAP_ARG_OFFSET to indicate that
OP-TEE with FF-A can support an argument struct at a non-zero offset into
a passed shared memory object.
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Diffstat (limited to 'drivers/tee/optee/optee_ffa.h')
| -rw-r--r-- | drivers/tee/optee/optee_ffa.h | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/tee/optee/optee_ffa.h b/drivers/tee/optee/optee_ffa.h index ee3a03fc392c..97266243deaa 100644 --- a/drivers/tee/optee/optee_ffa.h +++ b/drivers/tee/optee/optee_ffa.h @@ -81,8 +81,16 @@ * as the second MSG arg struct for * OPTEE_FFA_YIELDING_CALL_WITH_ARG. * Bit[31:8]: Reserved (MBZ) - * w5-w7: Note used (MBZ) + * w5: Bitfield of secure world capabilities OPTEE_FFA_SEC_CAP_* below, + * unused bits MBZ. + * w6-w7: Not used (MBZ) + */ +/* + * Secure world supports giving an offset into the argument shared memory + * object, see also OPTEE_FFA_YIELDING_CALL_WITH_ARG */ +#define OPTEE_FFA_SEC_CAP_ARG_OFFSET BIT(0) + #define OPTEE_FFA_EXCHANGE_CAPABILITIES OPTEE_FFA_BLOCKING_CALL(2) /* @@ -112,6 +120,8 @@ * OPTEE_MSG_GET_ARG_SIZE(num_params) follows a struct optee_msg_arg * for RPC, this struct has reserved space for the number of RPC * parameters as returned by OPTEE_FFA_EXCHANGE_CAPABILITIES. + * MBZ unless the bit OPTEE_FFA_SEC_CAP_ARG_OFFSET is received with + * OPTEE_FFA_EXCHANGE_CAPABILITIES. * w7: Not used (MBZ) * Resume from RPC. Register usage: * w3: Service ID, OPTEE_FFA_YIELDING_CALL_RESUME |