CONFIG_METAG_L2C is not available for thedefaultarchitecture x86.
Result is shown for architecture metag
default or selected kernelversion does not have config value CONFIG_METAG_L2C.
Result is shown for kernelversion 6.7-rc3

Level 2 Cache Support

modulename: l2cache.ko

configname: CONFIG_METAG_L2C

Linux Kernel Configuration
└─>Level 2 Cache Support
In linux kernel since version 3.1 (release Date: 2011-10-24)  
Press y here to enable support for the Meta Level 2 (L2) cache. This
will enable the cache at start up if it hasn't already been enabled
by the bootloader.

If the bootloader enables the L2 you must press y here to ensure the
kernel takes the appropriate actions to keep the cache coherent.

source code: