MSR_LBR_CORE_FROM  145 arch/x86/include/asm/msr-index.h #define MSR_LBR_CORE_FROM		0x00000040
MSR_LBR_CORE_FROM  412 tools/testing/selftests/kvm/include/x86_64/processor.h #define MSR_LBR_CORE_FROM		0x00000040