CONFIG_X86_5LEVEL is not available for the selected architecture x86.
Result is shown for architecture x86 or 64BIT
Enable 5-level page tables support
configname: CONFIG_X86_5LEVEL
Linux Kernel Configuration
└─>Processor type and features
└─>Enable 5-level page tables support
In linux kernel since version 3.10 (release Date: 2013-06-30)
5-level paging enables access to larger address space:
upto 128 PiB of virtual address space and 4 PiB of
physical address space.
It will be supported by future Intel CPUs.
Note: a kernel with this option enabled can only be booted
on machines that support the feature.
See <a href="https://www.kernel.org/doc/Documentation/x86/x86_64/5level-paging.txt">Documentation/x86/x86_64/5level-paging.txt</a> for more
information.
Say N if unsure.
upto 128 PiB of virtual address space and 4 PiB of
physical address space.
It will be supported by future Intel CPUs.
Note: a kernel with this option enabled can only be booted
on machines that support the feature.
See <a href="https://www.kernel.org/doc/Documentation/x86/x86_64/5level-paging.txt">Documentation/x86/x86_64/5level-paging.txt</a> for more
information.
Say N if unsure.