MSR_PERF_LIMIT_REASONS  331 arch/x86/include/asm/msr-index.h #define MSR_PERF_LIMIT_REASONS		0x0000064f
MSR_PERF_LIMIT_REASONS  560 tools/testing/selftests/kvm/include/x86_64/processor.h #define MSR_PERF_LIMIT_REASONS		0x0000064f