On 01/23/2018 08:52 AM, David Woodhouse wrote: > > diff --git a/arch/x86/include/asm/cpufeatures.h > b/arch/x86/include/asm/cpufeatures.h > index 7b25cf3..0a51070 100644 > --- a/arch/x86/include/asm/cpufeatures.h > +++ b/arch/x86/include/asm/cpufeatures.h > @@ -320,6 +320,9 @@ > /* Intel-defined CPU features, CPUID level 0x00000007:0 (EDX), word 18 */ > #define X86_FEATURE_AVX512_4VNNIW (18*32+ 2) /* AVX-512 Neural Network > Instructions */ > #define X86_FEATURE_AVX512_4FMAPS (18*32+ 3) /* AVX-512 Multiply > Accumulation Single precision */ > +#define X86_FEATURE_SPEC_CTRL (18*32+26) /* Speculation > Control (IBRS + IBPB) */ > +#define X86_FEATURE_STIBP (18*32+27) /* Single Thread Indirect > Branch Predictors */ > +#define X86_FEATURE_ARCH_CAPABILITIES (18*32+29) /* > IA32_ARCH_CAPABILITIES MSR (Intel) */
Should we be adding flags (STIBP) for which we currently have no user in the kernel?
