default or selected kernelversion does not have config value CONFIG_MLX5_EN_MACSEC.
Result is shown for kernelversion 6.9.9
Connect-X support for MACSec offload
configname: CONFIG_MLX5_EN_MACSEC
Linux Kernel Configuration
└─>Device Drivers
└─>Network device support
└─>Ethernet driver support
└─>Connect-X support for MACSec offload
In linux kernel since version 6.1 (release Date: 2022-12-11)
Build support for MACsec cryptography-offload acceleration in the NIC.