Hm, according to to this commit[1] (which is part of Linux 5.5) it should actually be build as a module per default. But in my /boot/config-5.5.0-1-arm64 I have
CONFIG_CRYPTO_DEV_ALLWINNER=y # CONFIG_CRYPTO_DEV_SUN4I_SS is not set # CONFIG_CRYPTO_DEV_SUN8I_CE is not set # CONFIG_CRYPTO_DEV_SUN8I_SS is not set Best, Philip [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2fabf6dd77014f19d45fc71c01f1b073c03df255