cpuinfo flags

[ThoughtVelocity]

When I do

cat /proc/cpuinfo

what do all the letter designations stand for? For example: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr, etc. Is there a list somewhere that has this info?

[CodeRoot]

From '/usr/include/asm/cpufeature.h':

/* Intel-defined CPU features, CPUID level 0x00000001 (edx), word 0 */
#define X86_FEATURE_FPU        (0*32+ 0) /* Onboard FPU */
#define X86_FEATURE_VME        (0*32+ 1) /* Virtual Mode Extensions */
#define X86_FEATURE_DE         (0*32+ 2) /* Debugging Extensions */
#define X86_FEATURE_PSE        (0*32+ 3) /* Page Size Extensions */
#define X86_FEATURE_TSC        (0*32+ 4) /* Time Stamp Counter */
#define X86_FEATURE_MSR        (0*32+ 5) /* Model-Specific Registers, RDMSR, WRMSR */
#define X86_FEATURE_PAE        (0*32+ 6) /* Physical Address Extensions */
#define X86_FEATURE_MCE        (0*32+ 7) /* Machine Check Architecture */
#define X86_FEATURE_CX8        (0*32+ 8) /* CMPXCHG8 instruction */
#define X86_FEATURE_APIC       (0*32+ 9) /* Onboard APIC */
#define X86_FEATURE_SEP        (0*32+11) /* SYSENTER/SYSEXIT */
#define X86_FEATURE_MTRR       (0*32+12) /* Memory Type Range Registers */
#define X86_FEATURE_PGE        (0*32+13) /* Page Global Enable */
#define X86_FEATURE_MCA        (0*32+14) /* Machine Check Architecture */
#define X86_FEATURE_CMOV       (0*32+15) /* CMOV instruction (FCMOVCC and FCOMI too if FPU present) */
#define X86_FEATURE_PAT        (0*32+16) /* Page Attribute Table */
#define X86_FEATURE_PSE36      (0*32+17) /* 36-bit PSEs */
#define X86_FEATURE_PN         (0*32+18) /* Processor serial number */
#define X86_FEATURE_CLFLSH     (0*32+19) /* Supports the CLFLUSH instruction */
#define X86_FEATURE_DTES       (0*32+21) /* Debug Trace Store */
#define X86_FEATURE_ACPI       (0*32+22) /* ACPI via MSR */
#define X86_FEATURE_MMX        (0*32+23) /* Multimedia Extensions */
#define X86_FEATURE_FXSR       (0*32+24) /* FXSAVE and FXRSTOR instructions (fast save and restore */
                                         /* of FPU context), and CR4.OSFXSR available */
#define X86_FEATURE_XMM        (0*32+25) /* Streaming SIMD Extensions */
#define X86_FEATURE_XMM2       (0*32+26) /* Streaming SIMD Extensions-2 */
#define X86_FEATURE_SELFSNOOP  (0*32+27) /* CPU self snoop */
#define X86_FEATURE_HT         (0*32+28) /* Hyper-Threading */
#define X86_FEATURE_ACC        (0*32+29) /* Automatic clock control */
#define X86_FEATURE_IA64       (0*32+30) /* IA-64 processor */