XMM2 457 arch/x86/kvm/cpuid.c F(FXSR) | F(XMM) | F(XMM2) | F(SELFSNOOP) | XMM2 38 tools/perf/arch/x86/util/perf_regs.c SMPL_REG2(XMM2, PERF_REG_X86_XMM2),