CONFIG_KVM_MIPS_DYN_TRANS is not available for thedefaultarchitecture x86.
Result is shown for architecture mips
default or selected kernelversion does not have config value CONFIG_KVM_MIPS_DYN_TRANS.
Result is shown for kernelversion 6.9.5

KVM/MIPS: Dynamic binary translation to reduce traps

configname: CONFIG_KVM_MIPS_DYN_TRANS

Linux Kernel Configuration
└─>Virtualization
└─>KVM/MIPS: Dynamic binary translation to reduce traps
In linux kernel since version 3.1 (release Date: 2011-10-24)  
When running in Trap & Emulate mode patch privileged
instructions to reduce the number of traps.

If unsure, say Y.