MSR_CORE_PERF_LIMIT_REASONS  325 arch/x86/include/asm/msr-index.h #define MSR_CORE_PERF_LIMIT_REASONS	0x00000690
MSR_CORE_PERF_LIMIT_REASONS  554 tools/testing/selftests/kvm/include/x86_64/processor.h #define MSR_CORE_PERF_LIMIT_REASONS	0x00000690