CONFIG_XIP_PHYS_ADDR is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

XIP Kernel Physical Location


Linux Kernel Configuration
└─>Boot options
└─>XIP Kernel Physical Location
In linux kernel since version 2.6.12  
This is the physical address in your flash memory the kernel will
be linked for and stored to. This address is dependent on your
own flash usage.