Hi,

oVirt CPU detection depends on libvirt (and that depends on qemu) CPU models. Could you please run the following command to see what libvirt reports?

virsh domcapabilities

That should give you the list of CPUs known to libvirt with a usability flag for each CPU.

If you find out that the CPU is not usable by libvirt, you might want to dig deeper by querying quemu directly.

Locate any VM running on the system by
sudo virsh list --all

Use the name of a VM in the following command:
sudo virsh qemu-monitor-command [your-vm's-name] --pretty '{"execute":"query-cpu-definitions"}'

That would give you the list of all CPUs supported by qemu and it will list all cpu's features that are not available on your system.

Regards,

Lucia

On Thu, Nov 19, 2020 at 9:38 PM Vinícius Ferrão via Users <users@ovirt.org> wrote:

Hi

 

I’ve an strange issue with two hosts (not using the hypervisor image) with EPYC CPUs, on the engine I got this message:

 

The host CPU does not match the Cluster CPU Type and is running in a degraded mode. It is missing the following CPU flags: model_EPYC. Please update the host CPU microcode or change the Cluster CPU Type.

 

But it is an EPYC CPU, the firmware is updated to the latest versions, but for some reason oVirt does not like it.

 

Here’s the relevant output from VDSM:

"cpuCores": "128",

    "cpuFlags": "ibs,vme,abm,sep,ssse3,perfctr_core,sse4_2,skip-l1dfl-vmentry,cx16,pae,misalignsse,avx2,smap,movbe,vgif,rdctl-no,extapic,clflushopt,de,sse4_1,xsaveerptr,perfctr_llc,fma,mca,sse,rdtscp,monitor,umip,mwaitx,cr8_legacy,mtrr,stibp,bmi2,pclmulqdq,amd-ssbd,lbrv,pdpe1gb,constant_tsc,vmmcall,f16c,ibrs,fsgsbase,invtsc,nopl,lm,3dnowprefetch,smca,ht,tsc_adjust,popcnt,cpb,bmi1,mmx,arat,aperfmperf,bpext,cqm_occup_llc,virt-ssbd,tce,pse,xsave,xgetbv1,topoext,sha_ni,amd_ppin,rdrand,cpuid,tsc_scale,extd_apicid,cqm,rep_good,tsc,sse4a,flushbyasid,pschange-mc-no,mds-no,ibpb,smep,clflush,tsc-deadline,fxsr,pat,avx,pfthreshold,v_vmsave_vmload,osvw,xsavec,cdp_l3,clzero,svm_lock,nonstop_tsc,adx,hw_pstate,spec-ctrl,arch-capabilities,xsaveopt,skinit,rdt_a,svm,rdpid,lahf_lm,fpu,rdseed,fxsr_opt,sse2,nrip_save,vmcb_clean,sme,cat_l3,cqm_mbm_local,irperf,overflow_recov,avic,mce,mmxext,msr,cx8,hypervisor,wdt,mba,nx,decodeassists,cmp_legacy,x2apic,perfctr_nb,succor,pni,xsaves,clwb,cqm_llc,syscall,apic,pge,npt,pse36,cmov,ssbd,pausefilter,sev,aes,wbnoinvd,cqm_mbm_total,spec_ctrl,model_qemu32,model_Opteron_G3,model_Nehalem-IBRS,model_qemu64,model_Conroe,model_kvm64,model_Penryn,model_SandyBridge,model_pentium,model_pentium2,model_kvm32,model_Nehalem,model_Opteron_G2,model_pentium3,model_Opteron_G1,model_SandyBridge-IBRS,model_486,model_Westmere-IBRS,model_Westmere",

    "cpuModel": "AMD EPYC 7H12 64-Core Processor",

    "cpuSockets": "2",

    "cpuSpeed": "3293.405",

    "cpuThreads": "256",

 

Any ideia on why ou what to do to fix it?

 

Thanks,

 

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