Hi,

The partitions would have to have a list of dependencies, so if your partition requires something from the Crypto one, the Crypto must in the list of deps of your partition and it will be initialised first.

Having said that, I believe the PSA_ERROR_INSUFFICIENT_MEMORY is being returned at some point by the API as Mbed TLS underneath might try to allocate some memory on the static allocator. The allocator is a buffer that is statically allocated in the TF-M Crypto partition and you can control its size by changing CRYPTO_ENGINE_BUF_SIZE at build time, the default is in:

❯ cat config_engine_buf.h

/*

 * Copyright (c) 2023, Arm Limited. All rights reserved.

 *

 * SPDX-License-Identifier: BSD-3-Clause

 *

 */

#ifndef __CONFIG_ENGINE_BUF_H__

#define __CONFIG_ENGINE_BUF_H__

/*

 * CRYPTO_ENGINE_BUF_SIZE is decided by multiple components configs.

 * CRYPTO_ENGINE_BUF_SIZE can be overridden below by other component configs.

 * It must be guaranteed that this header file is included at last before CRYPTO_ENGINE_BUF_SIZE

 * is referred in crypto_library.c.

 * Otherwise, crypto_library.c may include an incorrect definition value.

 */

/* The CC312 needs at least 0x4000 of heap size to work properly */

#if defined(CRYPTO_HW_ACCELERATOR_CC312) && (CRYPTO_ENGINE_BUF_SIZE < 0x4000)

#pragma message("CRYPTO_ENGINE_BUF_SIZE is redefined to 0x4000.")

#undef  CRYPTO_ENGINE_BUF_SIZE

#define CRYPTO_ENGINE_BUF_SIZE                 0x4000

#endif

#endif /* __CONFIG_ENGINE_BUF_H__ */

Different TF-M profiles might override this size with smaller (or bigger) sizes.

Hope this helps.

Thanks,

Antonio