Hello Simon,
I try to boot pine64-lts_defconfig + CONFIG_RSA=y.
SPL loads BL31. BL31 starts U-Boot. But before any output appears SPL is restarted. So some crash must occur.
If I remove the flag DM_FLAG_PRE_RELOC in drivers/crypto/rsa_mod_exp/mod_exp_sw.c, booting works fine.
Assigning the driver to UCLASS_NOP does not resolve the problem. So it seems not to be a problem with the u-class.
Enlarging CONFIG_SPL_SYS_MALLOC_F_LEN and CONFIG_SYS_MALLOC_F_LEN does not resolve the problem.
As the failure occurs very early no console is available for debug output. Defining LOG_DEBUG at the top of drivers/core/list.c provides no output.
Do you have an idea how to identify the root cause of the problem?
@Ruchika Why is this driver loaded before relocation? I cannot find any usage of function rsa_verify_key() before relocation.
Best regards
Heinrich