CONFIG_ARM64_PAN is not available for thedefaultarchitecture x86.
Result is shown for architecture arm64

Enable support for Privileged Access Never (PAN)

configname: CONFIG_ARM64_PAN

Linux Kernel Configuration
└─>Kernel Features
└─>ARMv8.1 architectural features
└─>Enable support for Privileged Access Never (PAN)
In linux kernel since version 4.1 (release Date: 2015-06-21)  
Privileged Access Never (PAN; part of the ARMv8.1 Extensions)
prevents the kernel or hypervisor from accessing user-space (EL0)
memory directly.

Choosing this option will cause any unprotected (not using
copy_to_user et al) memory access to fail with a permission fault.

The feature is detected at runtime, and will remain as a 'nop'
instruction if the cpu does not implement the feature.

is selected by