CPU Flags (created from https://github.com/torvalds/linux/blob/master/arch/x86/include/asm/cpufeatures.h)

CPU_FLAGS.txt

CLASS|FLAG|DESC
AMD-EXTENDED|3dnowprefetch|3DNow prefetch instructions
AMD-EXTENDED|abm|Advanced bit manipulation
AMD-EXTENDED|bpext|Data breakpoint extension
AMD-EXTENDED|cmp_legacy|If yes HyperThreading not valid
AMD-EXTENDED|cr8_legacy|CR8 in
AMD-EXTENDED|extapic|Extended APIC space
AMD-EXTENDED|fma4|4 operands MAC instructions
AMD-EXTENDED|ibs|Instruction Based Sampling
AMD-EXTENDED|lahf_lm|LAHF/SAHF in long mode
AMD-EXTENDED|lwp|Light Weight Profiling
AMD-EXTENDED|misalignsse|Misaligned SSE mode
AMD-EXTENDED|mwaitx|MWAIT extension (MONITORX/MWAITX instructions)
AMD-EXTENDED|nodeid_msr|NodeId MSR
AMD-EXTENDED|osvw|OS Visible Workaround
AMD-EXTENDED|perfctr_core|Core performance counter extensions
AMD-EXTENDED|perfctr_llc|Last Level Cache performance counter extensions
AMD-EXTENDED|perfctr_nb|NB performance counter extensions
AMD-EXTENDED|ptsc|Performance time-stamp counter
AMD-EXTENDED|skinit|SKINIT/STGI instructions
AMD-EXTENDED|sse4a|SSE-4A
AMD-EXTENDED|svm|Secure Virtual Machine
AMD-EXTENDED|tbm|Trailing Bit Manipulations
AMD-EXTENDED|tce|Translation Cache Extension
AMD-EXTENDED|topoext|Topology extensions CPUID leafs
AMD-EXTENDED|wdt|Watchdog timer
AMD-EXTENDED|xop|extended AVX instructions
AMD-SVM|avic13|Virtual Interrupt Controller
AMD-SVM|decodeassists|Decode Assists support
AMD-SVM|flushbyasid|flush-by-ASID support
AMD-SVM|lbrv|LBR Virtualization support
AMD-SVM|npt|Nested Page Table support
AMD-SVM|nrips|"nrip_save" SVM next_rip save
AMD-SVM|pausefilter10|filtered pause intercept
AMD-SVM|pfthreshold12|pause filter threshold
AMD-SVM|svml|"svm_lock" SVM locking MSR
AMD-SVM|tscratemsr|"tsc_scale" TSC scaling support
AMD-SVM|vgif16|Virtual GIF
AMD-SVM|vmcbclean|"vmcb_clean" VMCB clean bits support
AMD-SVM|v_vmsave_vmload15|Virtual VMSAVE VMLOAD
AMD|amd_ibpb12|Indirect Branch Prediction Barrier
AMD|amd_ibrs14|Indirect Branch Restricted Speculation
AMD|amd_ssbd24|Speculative Store Bypass Disable
AMD|amd_ssb_no26|Speculative Store Bypass is fixed in hardware.
AMD|amd_stibp15|Single Thread Indirect Branch Predictors
AMD|clzero|CLZERO instruction
AMD|irperf|Instructions Retired Count
AMD|overflow_recov|MCA overflow recovery support
AMD|smca|Scalable MCA
AMD|succor|Uncorrectable error containment and recovery
AMD|virt_ssbd25|Virtualized Speculative Store Bypass Disable
AMD|xsaveerptr|Always save/restore FP error pointers
AUX|cat_l2|Cache Allocation Technology L2
AUX|cat_l3|Cache Allocation Technology L3
AUX|cdp_l2|Code and Data Prioritization L2
AUX|cdp_l3|Code and Data Prioritization L3
AUX|cpb|AMD Core Performance Boost
AUX|cpuid_fault|Intel CPUID faulting
AUX|epb|IA32_ENERGY_PERF_BIAS support
AUX|hw_pstate|AMD HW-PState
AUX|ibpb|Indirect Branch Prediction Barrier
AUX|ibrs_enhanced|Enhanced IBRS
AUX|ibrs|Indirect Branch Restricted Speculation
AUX|intel_ppin|Intel Processor Inventory Number
AUX|invpcid_single|Effectively INVPCID && CR4.PCIDE=1
AUX|l1tf_pteinv|L1TF workaround PTE inversion
AUX|ls_cfg_ssbd|AMD SSBD implementation via LS_CFG MSR
AUX|mba|Memory Bandwidth Allocation
AUX|msr_spec_ctrl|MSR SPEC_CTRL is implemented
AUX|proc_feedback|AMD ProcFeedbackInterface
AUX|pti|Kernel Page Table Isolation enabled
AUX|retpoline_amd|AMD Retpoline mitigation for Spectre variant
AUX|retpoline|Generic Retpoline mitigation for Spectre variant
AUX|ring3mwait|Ring
AUX|rsb_ctxsw|Fill RSB on context switches
AUX|sev|AMD Secure Encrypted Virtualization
AUX|sme|AMD Secure Memory Encryption
AUX|spec_store_bypass_disable|Disable Speculative Store Bypass.
AUX|ssbd|Speculative Store Bypass Disable
AUX|stibp|Single Thread Indirect Branch Predictors
AUX|use_ibpb|Indirect Branch Prediction Barrier enabled
AUX|use_ibrs_fw|Use IBRS during runtime firmware calls
AUX|zen|CPU is AMD family
CPU-TYPE|acc_power|AMD Accumulated Power Mechanism
CPU-TYPE|always|Always-present feature
CPU-TYPE|amd_dcm|AMD multi-node processor
CPU-TYPE|aperfmperf|P-State hardware coordination feedback capability (APERF/MPERF MSRs)
CPU-TYPE|arch_perfmon|Intel Architectural PerfMon
CPU-TYPE|art|Always running timer (ART)
CPU-TYPE|bts|Branch Trace Store
CPU-TYPE|constant_tsc|TSC ticks at a constant rate
CPU-TYPE|cpuid|CPU has CPUID instruction itself
CPU-TYPE|extd_apicid|Extended APICID (8 bits)
CPU-TYPE|k7|Athlon
CPU-TYPE|k8|Opteron, Athlon64
CPU-TYPE|lfence_rdtsc|LFENCE synchronizes RDTSC
CPU-TYPE|mfence_rdtsc|MFENCE synchronizes RDTSC
CPU-TYPE|nonstop_tsc_s3|TSC doesn't stop in S3 state
CPU-TYPE|nonstop_tsc|TSC does not stop in C states
CPU-TYPE|nopl|The NOPL (0F
CPU-TYPE|p3|P3
CPU-TYPE|p4|P4
CPU-TYPE|pebs|Precise-Event Based Sampling
CPU-TYPE|rep_good|REP microcode works well
CPU-TYPE|syscall32|syscall in IA32 userspace
CPU-TYPE|sysenter32|sysenter in IA32 userspace
CPU-TYPE|tsc_known_freq|TSC has known frequency
CPU-TYPE|tsc_reliable|TSC is known to be reliable
CPU-TYPE|up|SMP kernel running on UP
CPU-TYPE|xtopology|CPU topology enum extensions
EXTENDED|xgetbv1|XGETBV with ECX =
EXTENDED|xsavec|XSAVEC instruction
EXTENDED|xsaveopt|XSAVEOPT instruction
EXTENDED|xsaves|XSAVES/XRSTORS instructions
INTEL-QoS|cqm_llc|LLC QoS if
INTEL-QoS|cqm_mbm_local|LLC Local MBM monitoring
INTEL-QoS|cqm_mbm_total|LLC Total MBM monitoring
INTEL-QoS|cqm_occup_llc|LLC occupancy monitoring
INTEL|3dnowext|AMD 3dnowext support in Intel
INTEL|3dnow|AMD 3dnow support on Intel
INTEL|acc|"tm" Automatic clock control
INTEL|acpi|ACPI via MSR
INTEL|adx|ADCX and ADOX instructions
INTEL|aes|AES instructions
INTEL|apic|Onboard APIC
INTEL|arch_capabilities29|IA32_ARCH_CAPABILITIES MSR (Intel)
INTEL|avx2|AVX2 instructions
INTEL|avx512bw|AVX-512 BW (Byte/Word granular) Instructions
INTEL|avx512cd|AVX-512 Conflict Detection
INTEL|avx512dq|AVX-512 DQ (Double/Quad granular) Instructions
INTEL|avx512er|AVX-512 Exponential and Reciprocal
INTEL|avx512f|AVX-512 Foundation
INTEL|avx512ifma|AVX-512 Integer Fused Multiply-Add instructions
INTEL|avx512pf|AVX-512 Prefetch
INTEL|avx512vbmi|AVX512 Vector Bit Manipulation instructions
INTEL|avx512vl|AVX-512 VL (128/256 Vector Length) Extensions
INTEL|avx512_4fmaps|AVX-512 Multiply Accumulation Single precision
INTEL|avx512_4vnniw|AVX-512 Neural Network Instructions
INTEL|avx512_bitalg12|Support for VPOPCNT[B,W] and VPSHUF-BITQMB instructions
INTEL|avx512_vbmi2|Additional AVX512 Vector Bit Manipulation Instructions
INTEL|avx512_vnni11|Vector Neural Network Instructions
INTEL|avx512_vpopcntdq14|POPCNT for vectors of DW/QW
INTEL|avx|Advanced Vector Extensions
INTEL|bmi1|1st group bit manipulation extensions
INTEL|bmi2|2nd group bit manipulation extensions
INTEL|cid|Context ID
INTEL|cldemote25|CLDEMOTE instruction
INTEL|clflushopt|CLFLUSHOPT instruction
INTEL|clflush|CLFLUSH instruction
INTEL|clwb|CLWB instruction
INTEL|cmov|CMOV instructions (plus FCMOVcc, FCOMI with FPU)
INTEL|cqm|Cache QoS Monitoring
INTEL|cx8|CMPXCHG8 instruction
INTEL|cx16|CMPXCHG16B instruction
INTEL|dca|Direct Cache Access
INTEL|de|Debugging Extensions
INTEL|dscpl|"ds_cpl" CPL-qualified (filtered) Debug Store
INTEL|ds|"dts" Debug Store
INTEL|dtes64|64-bit Debug Store
INTEL|erms|Enhanced REP MOVSB/STOSB instructions
INTEL|est|Enhanced SpeedStep
INTEL|f16c|16-bit FP conversions
INTEL|flush_l1d28|Flush L1D cache
INTEL|fma|Fused multiply-add
INTEL|fpu|Onboard FPU
INTEL|fsgsbase|RDFSBASE, WRFSBASE, RDGSBASE, WRGSBASE instructions
INTEL|fxsr_opt|AMD
INTEL|fxsr|FXSAVE/FXRSTOR, CR4.OSFXSR
INTEL|gbpages|AMD
INTEL|gfni|Galois Field New Instructions
INTEL|hle|Hardware Lock Elision
INTEL|ht|Hyper-Threading
INTEL|hypervisor|Running on a hypervisor
INTEL|ia64|IA-64 processor
INTEL|intel_pt|Intel Processor Trace
INTEL|intel_stibp27|Single Thread Indirect Branch Predictors
INTEL|invpcid|Invalidate Processor Context ID
INTEL|la5716|5-level page tables
INTEL|lm|AMD
INTEL|mca|Machine Check Architecture
INTEL|mce|Machine Check Exception
INTEL|mmxext|AMD
INTEL|mmx|Multimedia Extensions
INTEL|movbe|MOVBE instruction
INTEL|movdir64b28|MOVDIR64B instruction
INTEL|movdiri27|MOVDIRI instruction
INTEL|mpx|Memory Protection Extension
INTEL|mp|AMD
INTEL|msr|Model-Specific Registers
INTEL|mtrr|Memory Type Range Registers
INTEL|mwait|"monitor" MONITOR/MWAIT support
INTEL|nx|AMD
INTEL|ospke|OS Protection Keys Enable
INTEL|osxsave|XSAVE instruction enabled in the OS
INTEL|pae|Physical Address Extensions
INTEL|pat|Page Attribute Table
INTEL|pbe|Pending Break Enable
INTEL|pcid|Process Context Identifiers
INTEL|pclmulqdq|PCLMULQDQ instruction
INTEL|pconfig18|Intel PCONFIG
INTEL|pdcm|Perf/Debug Capabilities MSR
INTEL|pge|Page Global Enable
INTEL|pku|Protection Keys for Userspace
INTEL|pn|Processor serial number
INTEL|popcnt|POPCNT instruction
INTEL|pse36|36-bit PSEs
INTEL|pse|Page Size Extensions
INTEL|rdpid22|RDPID instruction
INTEL|rdrand|RDRAND instruction
INTEL|rdseed|RDSEED instruction
INTEL|rdtscp|AMD
INTEL|rdt_a|Resource Director Technology Allocation
INTEL|rtm|Restricted Transactional Memory
INTEL|sdbg|Silicon Debug
INTEL|selfsnoop|"ss" CPU self snoop
INTEL|sep|SYSENTER/SYSEXIT
INTEL|sha_ni|SHA1/SHA256 Instruction Extensions
INTEL|smap|Supervisor Mode Access Prevention
INTEL|smep|Supervisor Mode Execution Protection
INTEL|smx|Safer Mode eXtensions
INTEL|spec_ctrl26|Speculation Control (IBRS + IBPB)
INTEL|spec_ctrl_ssbd31|Speculative Store Bypass Disable
INTEL|ssse3|Supplemental SSE-3
INTEL|syscall|AMD
INTEL|tm2|Thermal Monitor
INTEL|tme13|Intel Total Memory Encryption
INTEL|tsc_adjust|TSC adjustment MSR
INTEL|tsc_deadline_timer|TSC deadline timer
INTEL|tsc|Time Stamp Counter
INTEL|umip|User Mode Instruction Protection
INTEL|vaes|Vector AES
INTEL|vme|Virtual Mode Extensions
INTEL|vmx|Hardware virtualization
INTEL|vpclmulqdq10|Carry-Less Multiplication Double Quadword
INTEL|x2apic|X2APIC
INTEL|xmm2|"sse2"
INTEL|xmm3|"pni" SSE-3
INTEL|xmm4_1|"sse4_1" SSE-4.1
INTEL|xmm4_2|"sse4_2" SSE-4.2
INTEL|xmm|"sse"
INTEL|xsave|XSAVE/XRSTOR/XSETBV/XGETBV instructions
INTEL|xtpr|Send Task Priority Messages
OTHER|centaur_mcr|Centaur MCRs (= MTRRs)
OTHER|cxmmx|Cyrix MMX extensions
OTHER|cyrix_arr|Cyrix ARRs (= MTRRs)
OTHER|k6_mtrr|AMD K6 nonstandard MTRRs
THERMAL|arat|Always Running APIC Timer
THERMAL|dtherm|Digital Thermal Sensor
THERMAL|hwp_act_window|HWP Activity Window
THERMAL|hwp_epp10|HWP Energy Perf. Preference
THERMAL|hwp_notify|HWP Notification
THERMAL|hwp_pkg_req11|HWP Package Level Request
THERMAL|hwp|Intel Hardware P-states
THERMAL|ida|Intel Dynamic Acceleration
THERMAL|pln|Intel Power Limit Notification
THERMAL|pts|Intel Package Thermal Status
TRANSMETA|longrun|Longrun power control
TRANSMETA|lrti|LongRun table interface
TRANSMETA|recovery|CPU in recovery mode
V12N|ept_ad|Intel Extended Page Table access-dirty bit
V12N|ept|Intel Extended Page Table
V12N|flexpriority|Intel FlexPriority
V12N|tpr_shadow|Intel TPR Shadow
V12N|vmmcall|Prefer VMMCALL to VMCALL
V12N|vnmi|Intel Virtual NMI
V12N|vpid|Intel Virtual Processor ID
V12N|xenpv|Xen paravirtual guest
VIA|ace2_en|ACE v2 enabled
VIA|ace2|Advanced Cryptography Engine v2
VIA|phe_en|PHE enabled
VIA|phe|PadLock Hash Engine
VIA|pmm_en|PMM enabled
VIA|pmm|PadLock Montgomery Multiplier
VIA|xcrypt_en|"ace_en" on-CPU crypto enabled
VIA|xcrypt|"ace" on-CPU crypto (xcrypt)
VIA|xstore_en|"rng_en" RNG enabled
VIA|xstore|"rng" RNG present (xstore)