CONFIG_CRYPTO_CURVE25519_X86 is not available for the selected architecture x86.
Result is shown for architecture x86 or 64BIT

CONFIG_CRYPTO_CURVE25519_X86 (not configurable)

modulename: curve25519-x86_64.ko

configname: CONFIG_CRYPTO_CURVE25519_X86

Linux Kernel Configuration
└─>Accelerated Cryptographic Algorithms for CPU (x86)
└─>CRYPTO_CURVE25519_X86
In linux kernel since version 4.14.326 (release Date: 2023-09-23)
Curve25519 algorithm

Architecture: x86_64 using:
- ADX (large integer arithmetic)
source code: