CONFIG_CPU_XLR is not available for thedefaultarchitecture x86.
Result is shown for architecture mips
Netlogic XLR SoC
modulename: pci-xlr.ko
configname: CONFIG_CPU_XLR
CPU type
└─>Netlogic XLR SoC
In linux kernel since version 3 (release Date: 2011-07-21)
Netlogic Microsystems XLR/XLS processors.