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@ -3,11 +3,13 @@
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* <https://github.com/torvalds/linux/blob/master/arch/x86/include/asm/cpufeatures.h>
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* informations: <https://en.wikipedia.org/wiki/CPUID>
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## Intel-defined CPU features
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* CPUID level 0x00000001 (edx), word 0
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```
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```text
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ACPI ⟷ ACPI via MSR
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APIC ⟷ Onboard APIC
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CLFLUSH ⟷ CLFLUSH instruction
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@ -44,7 +46,7 @@ VME ⟷ Virtual Mode Extensions
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* CPUID level 0x80000001, word 1 no duplicate feature flags which are redundant with Intel!
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```
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```text
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3DNOW ⟷ 3DNow!
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3DNOWEXT ⟷ AMD 3DNow! extensions
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FXSR_OPT ⟷ FXSAVE/FXRSTOR optimizations
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@ -61,7 +63,7 @@ SYSCALL ⟷ SYSCALL/SYSRET
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* CPUID level 0x80860001, word 2
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```
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```text
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LONGRUN ⟷ Longrun power control
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LRTI ⟷ LongRun table interface
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RECOVERY ⟷ CPU in recovery mode
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@ -72,7 +74,7 @@ RECOVERY ⟷ CPU in recovery mode
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* word 3 This range is used for feature bits which conflict or are synthesized
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```
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```text
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CENTAUR_MCR ⟷ Centaur MCRs (= MTRRs)
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CXMMX ⟷ Cyrix MMX extensions
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CYRIX_ARR ⟷ Cyrix ARRs (= MTRRs)
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@ -80,7 +82,7 @@ CYRIX_ARR ⟷ Cyrix ARRs (= MTRRs)
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## cpu types for specific tunings
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```
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```text
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ACC_POWERAMD ⟷ Accumulated Power Mechanism
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ALWAYS ⟷ Always-present feature
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AMD_DCM ⟷ multi-node processor
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@ -115,7 +117,7 @@ XTOPOLOGY ⟷ cpu topology enum extensions
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* CPUID level 0x00000001 (ecx), word 4
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```
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```text
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AES ⟷ AES instructions
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AVX ⟷ Advanced Vector Extensions
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CID ⟷ Context ID
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@ -154,7 +156,7 @@ XTPR ⟷ Send Task Priority Messages
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* CPUID level 0xC0000001, word 5
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```
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```text
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ACE2 ⟷ Advanced Cryptography Engine v2
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ACE2_EN ⟷ ACE v2 enabled
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ACE_EN ⟷ on-CPU crypto enabled
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@ -172,7 +174,7 @@ RNG ⟷ RNG present (xstore)
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* CPUID level 0x80000001, ecx, word 6
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```
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```text
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3DNOWPREFETCH ⟷ 3DNow prefetch instructions
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ABM ⟷ Advanced bit manipulation
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BPEXT ⟷ data breakpoint extension
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@ -206,7 +208,7 @@ XOP ⟷ extended AVX instructions
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* For features scattered in various CPUID levels like 0x6, 0xA etc, word 7.
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```
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```text
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AVX512_4FMAPS ⟷ AVX-512 Multiply Accumulation Single precision
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AVX512_4VNNIW ⟷ AVX-512 Neural Network Instructions
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CAT_L2 ⟷ Cache Allocation Technology L2
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@ -229,7 +231,7 @@ SME ⟷ AMD Secure Memory Encryption
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* Linux defined, word 8
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```
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```text
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EPT ⟷ Intel Extended Page Table
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FLEXPRIORITY ⟷ Intel FlexPriority
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TPR_SHADOW ⟷ Intel TPR Shadow
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@ -244,7 +246,7 @@ XENPV ⟷ Xen paravirtual guest
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* CPUID level 0x00000007:0 (ebx), word 9
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```
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```text
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ADX ⟷ The ADCX and ADOX instructions
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AVX2 ⟷ AVX2 instructions
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AVX512BW ⟷ AVX-512 BW (Byte/Word granular) Instructions
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@ -279,7 +281,7 @@ TSC_ADJUST ⟷ TSC adjustment MSR 0x3b
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* CPUID level 0x0000000d:1 (eax), word 10
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```
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```text
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XGETBV1 ⟷ XGETBV with ECX = 1
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XSAVEC ⟷ XSAVEC
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XSAVEOPT ⟷ XSAVEOPT
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@ -291,7 +293,7 @@ XSAVES ⟷ XSAVES/XRSTORS
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* CPUID level 0x0000000F:0 (edx), word 11
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```
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```text
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CQM_LLC ⟷ LLC QoS if 1
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```
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@ -300,7 +302,7 @@ CQM_LLC ⟷ LLC QoS if 1
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* CPUID level 0x0000000F:1 (edx), word 12
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```
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```text
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CQM_MBM_LOCAL ⟷ LLC Local MBM monitoring
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CQM_MBM_TOTAL ⟷ LLC Total MBM monitoring
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CQM_OCCUP_LLC ⟷ LLC occupancy monitoring if 1
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@ -311,7 +313,7 @@ CQM_OCCUP_LLC ⟷ LLC occupancy monitoring if 1
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* CPUID level 0x80000008 (ebx), word 13
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```
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```text
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CLZERO ⟷ CLZERO instruction
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IRPERF ⟷ Instructions Retired Count
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```
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@ -321,7 +323,7 @@ IRPERF ⟷ Instructions Retired Count
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* CPUID level 0x00000006 (eax), word 14
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```
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```text
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ARAT ⟷ Always Running APIC Timer
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DTHERM ⟷ Digital Thermal Sensor
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HWP_ACT_WINDOW ⟷ HWP Activity Window
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@ -339,7 +341,7 @@ PTS ⟷ Intel Package Thermal Status
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* CPUID level 0x8000000a (edx), word 15
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```
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```text
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AVIC ⟷ Virtual Interrupt Controller
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DECODEASSISTS ⟷ Decode Assists support
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FLUSHBYASID ⟷ flush-by-ASID support
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@ -359,7 +361,7 @@ V_VMSAVE_VMLOAD ⟷ Virtual VMSAVE VMLOAD
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* CPUID level 0x00000007:0 (ecx), word 16
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```
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```text
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AVX512VBMI ⟷ AVX512 Vector Bit Manipulation instructions
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AVX512_VPOPCNTDQ ⟷ POPCNT for vectors of DW/QW
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LA57 ⟷ 5-level page tables
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@ -373,7 +375,7 @@ RDPID ⟷ RDPIDinstruction
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* CPUID level 0x80000007 (ebx), word 17
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```
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```text
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OVERFLOW_RECOV ⟷ MCA overflow recovery support
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SMCA ⟷ Scalable MCA
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SUCCOR ⟷ Uncorrectable error containment and recovery
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@ -381,7 +383,7 @@ SUCCOR ⟷ Uncorrectable error containment and recovery
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# TOTAL TRI
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```
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```text
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3DNOW ⟷ 3DNow!
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3DNOWEXT ⟷ AMD 3DNow! extensions
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3DNOWPREFETCH ⟷ 3DNow prefetch instructions
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