Re: [Qemu-devel] [PATCH 1/1] x86: add CPU flags supported inside libvirt

[Paolo Bonzini]

On 19/07/19 22:53, Eduardo Habkost wrote:
> This is one is named "cqm" on Linux (X86_FEATURE_CQM).  I prefer
> to keep consistency with the name already in use by Linux than
> the one in libvirt that was never used.
> 
> You can still add a "cmt" alias property if you think it would be
> useful.

Actually KVM does not mark it as supported:

        const u32 kvm_cpuid_7_0_ebx_x86_features =
                F(FSGSBASE) | F(BMI1) | F(HLE) | F(AVX2) | F(SMEP) |
                F(BMI2) | F(ERMS) | f_invpcid | F(RTM) | f_mpx | F(RDSEED) |
                F(ADX) | F(SMAP) | F(AVX512IFMA) | F(AVX512F) | F(AVX512PF) |
                F(AVX512ER) | F(AVX512CD) | F(CLFLUSHOPT) | F(CLWB) | 
F(AVX512DQ) |
                F(SHA_NI) | F(AVX512BW) | F(AVX512VL) | f_intel_pt;

Paolo