CPU feature detection. More...

Data Structures
struct	cpuid_output_t
	Output structure for CPUID instruction. More...

struct	cpuid_feature_info_t
	CPU feature information structure. More...

struct	cpuid_extended_feature_info_t
	CPU extended feature information structure. More...

Enumerations
enum	cpuid_input_eax_t { CPUID_EAX_NONE = 0x00 , CPUID_EAX_FEATURE_INFO = 0x01 , CPUID_EAX_EXTENDED_FEATURE_INFO = 0x07 }
	Input EAX values. More...

enum	cpuid_input_ecx_t { CPUID_ECX_NONE = 0x00 }
	Input ECX values. More...

enum	cpuid_ecx_features_t { CPUID_ECX_SSE3 = 1 << 0 , CPUID_ECX_PCLMULQDQ = 1 << 1 , CPUID_ECX_DTES64 = 1 << 2 , CPUID_ECX_MONITOR = 1 << 3 , CPUID_ECX_DS_CPL = 1 << 4 , CPUID_ECX_VMX = 1 << 5 , CPUID_ECX_SMX = 1 << 6 , CPUID_ECX_EIST = 1 << 7 , CPUID_ECX_TM2 = 1 << 8 , CPUID_ECX_SSSE3 = 1 << 9 , CPUID_ECX_CNXT_ID = 1 << 10 , CPUID_ECX_SDBG = 1 << 11 , CPUID_ECX_FMA = 1 << 12 , CPUID_ECX_CMPXCHG16B = 1 << 13 , CPUID_ECX_XTPR_UPDATE_CONTROL = 1 << 14 , CPUID_ECX_PDCM = 1 << 15 , CPUID_ECX_PCID = 1 << 17 , CPUID_ECX_DCA = 1 << 18 , CPUID_ECX_SSE4_1 = 1 << 19 , CPUID_ECX_SSE4_2 = 1 << 20 , CPUID_ECX_X2APIC = 1 << 21 , CPUID_ECX_MOVBE = 1 << 22 , CPUID_ECX_POPCNT = 1 << 23 , CPUID_ECX_TSC_DEADLINE = 1 << 24 , CPUID_ECX_AESNI = 1 << 25 , CPUID_ECX_XSAVE = 1 << 26 , CPUID_ECX_OSXSAVE = 1 << 27 , CPUID_ECX_AVX = 1 << 28 , CPUID_ECX_F16C = 1 << 29 , CPUID_ECX_RDRAND = 1 << 30 }
	ECX feature flags. More...

enum	cpuid_edx_features_t { CPUID_EDX_FPU = 1 << 0 , CPUID_EDX_VME = 1 << 1 , CPUID_EDX_DE = 1 << 2 , CPUID_EDX_PSE = 1 << 3 , CPUID_EDX_TSC = 1 << 4 , CPUID_EDX_MSR = 1 << 5 , CPUID_EDX_PAE = 1 << 6 , CPUID_EDX_MCE = 1 << 7 , CPUID_EDX_CX8 = 1 << 8 , CPUID_EDX_APIC = 1 << 9 , CPUID_EDX_SEP = 1 << 11 , CPUID_EDX_MTRR = 1 << 12 , CPUID_EDX_PGE = 1 << 13 , CPUID_EDX_MCA = 1 << 14 , CPUID_EDX_CMOV = 1 << 15 , CPUID_EDX_PAT = 1 << 16 , CPUID_EDX_PSE36 = 1 << 17 , CPUID_EDX_PSN = 1 << 18 , CPUID_EDX_CLFSH = 1 << 19 , CPUID_EDX_RESERVED1 = 1 << 20 , CPUID_EDX_DS = 1 << 21 , CPUID_EDX_ACPI = 1 << 22 , CPUID_EDX_MMX = 1 << 23 , CPUID_EDX_FXSR = 1 << 24 , CPUID_EDX_SSE = 1 << 25 , CPUID_EDX_SSE2 = 1 << 26 , CPUID_EDX_SS = 1 << 27 , CPUID_EDX_HTT = 1 << 28 , CPUID_EDX_TM = 1 << 29 , CPUID_EDX_RESERVED2 = 1 << 30 , CPUID_EDX_PBE = 1 << 31 }

enum	cpuid_ebx_features_t { CPUID_EBX_FSGSBASE = 1 << 0 , CPUID_EBX_TSC_ADJUST = 1 << 1 , CPUID_EBX_SGX = 1 << 2 , CPUID_EBX_BMI1 = 1 << 3 , CPUID_EBX_HLE = 1 << 4 , CPUID_EBX_AVX2 = 1 << 5 , CPUID_EBX_FDP_EXCPTN_ONLY = 1 << 6 , CPUID_EBX_SMEP = 1 << 7 , CPUID_EBX_BMI2 = 1 << 8 , CPUID_EBX_ERMS = 1 << 9 , CPUID_EBX_INVPCID = 1 << 10 , CPUID_EBX_RTM = 1 << 11 , CPUID_EBX_RDT_M = 1 << 12 , CPUID_EBX_FPU_CS_DS_DEPR = 1 << 13 , CPUID_EBX_MPX = 1 << 14 , CPUID_EBX_RDT_A = 1 << 15 , CPUID_EBX_AVX512F = 1 << 16 , CPUID_EBX_AVX512DQ = 1 << 17 , CPUID_EBX_RDSEED = 1 << 18 , CPUID_EBX_ADX = 1 << 19 , CPUID_EBX_SMAP = 1 << 20 , CPUID_EBX_AVX512_IFMA = 1 << 21 , CPUID_EBX_RESERVED1 = 1 << 22 , CPUID_EBX_CLFLUSHOPT = 1 << 23 , CPUID_EBX_CLWB = 1 << 24 , CPUID_EBX_INTEL_PT = 1 << 25 , CPUID_EBX_AVX512PF = 1 << 26 , CPUID_EBX_AVX512ER = 1 << 27 , CPUID_EBX_AVX512CD = 1 << 28 , CPUID_EBX_SHA = 1 << 29 , CPUID_EBX_AVX512BW = 1 << 30 , CPUID_EBX_AVX512VL = 1 << 31 }
	EBX feature flags. More...

Functions
static void	cpuid (cpuid_input_eax_t eax, cpuid_input_ecx_t ecx, cpuid_output_t *out)
	CPUID instruction.

static void	cpuid_feature_info (cpuid_feature_info_t *info)
	Wrapper to get CPU feature information.

static void	cpuid_extended_feature_info (cpuid_extended_feature_info_t *info)
	Wrapper to get CPU extended feature information.

Detailed Description

CPU feature detection.

The sys/cpuid.h header provides functions for detecting CPU features using the CPUID instruction.

See also: CPUID Instruction

Enumeration Type Documentation

◆ cpuid_ebx_features_t

enum cpuid_ebx_features_t

EBX feature flags.

These flags are returned in the EBX register after calling the CPUID instruction with EAX=CPUID_FEATURE_EXTENDED_ID.

These flags are returned in the EBX register after calling the CPUID instruction with EAX=CPUID_EAX_EXTENDED_FEATURE_INFO and ECX=0.

Enumerator
CPUID_EBX_FSGSBASE
CPUID_EBX_TSC_ADJUST
CPUID_EBX_SGX
CPUID_EBX_BMI1
CPUID_EBX_HLE
CPUID_EBX_AVX2
CPUID_EBX_FDP_EXCPTN_ONLY
CPUID_EBX_SMEP
CPUID_EBX_BMI2
CPUID_EBX_ERMS
CPUID_EBX_INVPCID
CPUID_EBX_RTM
CPUID_EBX_RDT_M
CPUID_EBX_FPU_CS_DS_DEPR
CPUID_EBX_MPX
CPUID_EBX_RDT_A
CPUID_EBX_AVX512F
CPUID_EBX_AVX512DQ
CPUID_EBX_RDSEED
CPUID_EBX_ADX
CPUID_EBX_SMAP
CPUID_EBX_AVX512_IFMA
CPUID_EBX_RESERVED1
CPUID_EBX_CLFLUSHOPT
CPUID_EBX_CLWB
CPUID_EBX_INTEL_PT
CPUID_EBX_AVX512PF
CPUID_EBX_AVX512ER
CPUID_EBX_AVX512CD
CPUID_EBX_SHA
CPUID_EBX_AVX512BW
CPUID_EBX_AVX512VL

Definition at line 127 of file cpuid.h.

◆ cpuid_ecx_features_t

enum cpuid_ecx_features_t

ECX feature flags.

These flags are returned in the ECX register after calling the CPUID instruction with EAX=CPUID_EAX_FEATURE_INFO.

Enumerator
CPUID_ECX_SSE3
CPUID_ECX_PCLMULQDQ
CPUID_ECX_DTES64
CPUID_ECX_MONITOR
CPUID_ECX_DS_CPL
CPUID_ECX_VMX
CPUID_ECX_SMX
CPUID_ECX_EIST
CPUID_ECX_TM2
CPUID_ECX_SSSE3
CPUID_ECX_CNXT_ID
CPUID_ECX_SDBG
CPUID_ECX_FMA
CPUID_ECX_CMPXCHG16B
CPUID_ECX_XTPR_UPDATE_CONTROL
CPUID_ECX_PDCM
CPUID_ECX_PCID
CPUID_ECX_DCA
CPUID_ECX_SSE4_1
CPUID_ECX_SSE4_2
CPUID_ECX_X2APIC
CPUID_ECX_MOVBE
CPUID_ECX_POPCNT
CPUID_ECX_TSC_DEADLINE
CPUID_ECX_AESNI
CPUID_ECX_XSAVE
CPUID_ECX_OSXSAVE
CPUID_ECX_AVX
CPUID_ECX_F16C
CPUID_ECX_RDRAND

Definition at line 45 of file cpuid.h.

◆ cpuid_edx_features_t

enum cpuid_edx_features_t

Enumerator
CPUID_EDX_FPU
CPUID_EDX_VME
CPUID_EDX_DE
CPUID_EDX_PSE
CPUID_EDX_TSC
CPUID_EDX_MSR
CPUID_EDX_PAE
CPUID_EDX_MCE
CPUID_EDX_CX8
CPUID_EDX_APIC
CPUID_EDX_SEP
CPUID_EDX_MTRR
CPUID_EDX_PGE
CPUID_EDX_MCA
CPUID_EDX_CMOV
CPUID_EDX_PAT
CPUID_EDX_PSE36
CPUID_EDX_PSN
CPUID_EDX_CLFSH
CPUID_EDX_RESERVED1
CPUID_EDX_DS
CPUID_EDX_ACPI
CPUID_EDX_MMX
CPUID_EDX_FXSR
CPUID_EDX_SSE
CPUID_EDX_SSE2
CPUID_EDX_SS
CPUID_EDX_HTT
CPUID_EDX_TM
CPUID_EDX_RESERVED2
CPUID_EDX_PBE