CONFIG_CPU_MIPS64_R5 is not available for thedefaultarchitecture x86.
Result is shown for architecture mips
MIPS64 Release 5
configname: CONFIG_CPU_MIPS64_R5
CPU type
└─>MIPS64 Release 5
In linux kernel since version 4.14.326 (release Date: 2023-09-23)
Choose this option to build a kernel for release 5 or later of the
MIPS64 architecture. This is a intermediate MIPS architecture
release partly implementing release 6 features. Though there is no
any hardware known to be based on this release.
MIPS64 architecture. This is a intermediate MIPS architecture
release partly implementing release 6 features. Though there is no
any hardware known to be based on this release.