On Fri, Oct 28, 2016 at 11:31:05AM +0200, Paolo Bonzini wrote: > > > On 28/10/2016 11:12, He Chen wrote: > > The spec can be found in Intel Software Developer Manual or in > > Instruction Set Extensions Programming Reference. > > > > Signed-off-by: Luwei Kang <luwei.k...@intel.com> > > Signed-off-by: He Chen <he.c...@linux.intel.com> > > --- > > arch/x86/kvm/cpuid.c | 7 ++++++- > > 1 file changed, 6 insertions(+), 1 deletion(-) > > > > diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c > > index afa7bbb..328b169 100644 > > --- a/arch/x86/kvm/cpuid.c > > +++ b/arch/x86/kvm/cpuid.c > > @@ -376,6 +376,10 @@ static inline int __do_cpuid_ent(struct > > kvm_cpuid_entry2 *entry, u32 function, > > /* cpuid 7.0.ecx*/ > > const u32 kvm_cpuid_7_0_ecx_x86_features = F(PKU) | 0 /*OSPKE*/; > > > > + /* cpuid 7.0.edx*/ > > + const u32 kvm_cpuid_7_0_edx_x86_features = > > + 0x4 /* AVX512-4VNNIW */ | 0x8 /* AVX512-4FMAPS */; > > Please define the new features in cpufeature.h first. > These 2 new features defined as scattered features in kernel. In cpufeature.h, there are: #define X86_FEATURE_AVX512_4VNNIW (7*32+16) #define X86_FEATURE_AVX512_4FMAPS (7*32+17)
Please see disscusion here: https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg1250183.html Thanks, -He
