cmp_legacy: If yes HyperThreading not valid.lahf_lm: Load AH from Flags (LAHF) and Store AH into Flags (SAHF) in long mode.More extended AMD flags: CPUID level 0x80000001, ecx rng_en: Random Number Generator enabled.rng: Random Number Generator present (xstore).VIA/Cyrix/Centaur-defined CPU features, CPUID level 0xC0000001 rdrand: Read Random Number from hardware random number generator instruction.xsave: Save Processor Extended States: also provides XGETBY, XRSTOR, XSETBY.aes/ aes-ni: Advanced Encryption Standard (New Instructions).popcnt: Return the Count of Number of Bits Set to 1 instruction ( Hamming weight, i.e.movbe: Move Data After Swapping Bytes instruction.vmx: Hardware virtualization: Intel VMX.monitor: Monitor/Mwait support ( Intel SSE3 supplements).pclmulqdq: Perform a Carry-Less Multiplication of Quadword instruction - accelerator for GCM).pni: SSE-3 (“ Prescott New Instructions”).See also Wikipedia and table 2-26 in Intel Advanced Vector Extensions Programming Reference Intel-defined CPU features, CPUID level 0x00000001 (ecx) mce_recovery: CPU has recoverable machine checks.tsc_known_freq: TSC has known frequency.nonstop_tsc_s3: TSC doesn't stop in S3 state.extd_apicid: has extended APICID (8 bits).cpuid: CPU has CPUID instruction itself.nonstop_tsc: TSC does not stop in C states.tsc_reliable: TSC is known to be reliable. xtopology: cpu topology enum extensions.acc_power: AMD accumulated power mechanism.arch_perfmon: Intel Architectural PerfMon.constant_tsc: TSC ticks at a constant rate.Transmeta-defined CPU features, CPUID level 0x80860001 3dnow: 3DNow! (AMD vector instructions, competing with Intel's SSE1).lm: Long Mode ( x86-64: amd64, also known as Intel 64, i.e.rdtscp: Read Time-Stamp Counter and Processor ID.pdpe1gb: One GB pages (allows hugepagesz=1G).syscall: SYSCALL (Fast System Call) and SYSRET (Return From Fast System Call).See also Wikipedia and table 2-23 in Intel Advanced Vector Extensions Programming Reference pbe: Pending Break Enable (PBE# pin) wakeup supportĪMD-defined CPU features, CPUID level 0x80000001.ia64: Intel Itanium Architecture 64-bit (not to be confused with Intel's 64-bit x86 architecture with flag x86-64 or "AMD64" bit indicated by flag lm).tm: Automatic clock control (Thermal Monitor).acpi: ACPI via MSR (temperature monitoring and clock speed modulation).dts: Debug Store (buffer for debugging and profiling instructions). cmov: CMOV instructions (conditional move) (also FCMOV).
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