Does PSA_MAX_IOVEC (= 4U) mean one can only pass 4 data-vectors at most to psa_call()?

[gdl]

psa/client.h describes and defines PSA_MAX_IOVEC as follows:

/**
 * Maximum number of input and output vectors for a request to psa_call().
 */
#define PSA_MAX_IOVEC               (4u)

Just to be sure: This means that psa_call can only pass 4 input- and output vectors in a psa_call(), or?

(E.g. 2 input-vectors and 2 outputs or 3 inputs and 1 output. And if we have more inputs and outputs they need to be serialized.)
(psa_call() is used to call a service in a secure partition from the non-secure world.)

[Einar Thorsrud]

Hi,

Yes, that is my understandig as well. The sum of input and output vectors must be less than or equal to PSA_MAX_IOVEC.

[gdl]

Ok Thank you