On Fri, Jul 19, 2019 at 11:44:57PM +0200, Paolo Bonzini wrote: > 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;
We can still add the feature name if we also set it on .unmigratable_features, but I don't see why it would be useful. Is anybody working to support exposing RDT-M to guests? -- Eduardo