Description of problem:

I've upgraded our engine to 4.4 and wanted to upgrade our host to 4.4 as well. I've reinstalled the machine with CentOS 8.2 and wanted to add it back to the cluster but it fails with a message indicating that some needed cpu flags are missing.

Initially I tried to add it to an existing 4.3 cluster with cpu type Intel Skylake Server IBRS SSBD MDS Family but this failed. I've then created a new 4.4 cluster with cpu type Secure Intel Skylake Server Family but this also fails wit the 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: vmx, ssbd, md_clear, model_Skylake-Server, spec_ctrl. Please update the host CPU microcode or change the Cluster CPU Type.

When I look at the detected features in the vdsm log:

'info': {'kvmEnabled': 'true', 'cpuCores': '10', 'cpuThreads': '20', 'cpuSockets': '1', 'onlineCpus':
'0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19', 'cpuSpeed': '1002.074', 'cpuModel': 'Intel(R) Xeon(R) Silver 4114 CPU @ 2.20GHz', 'cpuFlags': 'tpr_shadow,monitor,nx,rtm,cqm_mbm_local,pat,fxsr,adx,rdtscp,pku,cat_l3,avx,smap,x2apic,pcid,mca,ht,cmov,dts,popcnt,fsgsbase,rdseed,erms,art,avx2,fma,invpcid_single,fpu,pdpe1gb,bmi1,ospke,flush_l1d,msr,sep,vmx,sse2,md_clear,tm,invpcid,clflushopt,intel_pt,smep,epb,aes,pclmulqdq,ssse3,avx512f,pts,stibp,mtrr,vme,xsaveopt,ept,pbe,flexpriority,hypervisor,hle,smx,dca,tsc_adjust,sse4_2,ibpb,rdt_a,skip-l1dfl-vmentry,clwb,sse4_1,avx512dq,cpuid_fault,ds_cpl,pdcm,arat,apic,avx512bw,de,pae,vnmi,cqm,f16c,cqm_llc,xtopology,amd-ssbd,avx512cd,pge,xtpr,constant_tsc,pse,arch-capabilities,nopl,sse,clflush,xsaves,cqm_occup_llc,pti,xgetbv1,sdbg,ss,xsave,pebs,cx16,mmx,syscall,lahf_lm,abm,ssbd,aperfmperf,cpuid,pse36,3dnowprefetch,mce,mba,dtes64,dtherm,mpx,intel_ppin,tsc_deadline_timer,tm2,vpid,nonstop_tsc,arch_perfmon,movbe,umip,md-clear,est,tsc,rdrand,cqm_mbm_total,pni,cdp_l3,cx8,acpi,rep_good,lm,bts,xsavec,bmi2,ida,pln,invtsc,avx512vl,ibrs,model_Broadwell-IBRS,model_Skylake-Server-IBRS,model_Skylake-Client-IBRS,model_n270,model_Penryn,model_Opteron_G2,model_coreduo,model_Westmere,model_Skylake-Client,model_Nehalem,model_Westmere-IBRS,model_Opteron_G1,model_qemu32,model_Nehalem-IBRS,model_SandyBridge,model_pentium2,model_SandyBridge-IBRS,model_Haswell-noTSX-IBRS,model_Haswell-IBRS,model_IvyBridge,model_qemu64,model_pentium,model_Haswell,model_kvm64,model_Broadwell-noTSX-IBRS,model_pentium3,model_Broadwell-noTSX,model_Broadwell,model_IvyBridge-IBRS,model_Conroe,model_Haswell-noTSX,model_core2duo,model_486,model_Skylake-Server,model_kvm32', 'version_name': 'Snow Man', 'software_version': '4.40.22', 'software_revision': '1', 'supportedENGINEs': ['4.2', '4.3', '4.4'], 'clusterLevels': ['4.2', '4.3', '4.4']

The "missing" features are all there except spec_ctrl. According to https://bugzilla.redhat.com/show_bug.cgi?id=1837266 this should get added automatically on IBRS cpu's, but it seems it isn't in this case.

With the cpu type set to Intel Skylake Server Family it also complains about other missing features that are also clearly present in /proc/cpuinfo (such as vmx and nx)


Version-Release number of selected component (if applicable):
vdsm-4.40.22-1.el8.x86_64

How reproducible:


Steps to Reproduce:
1. Add an Intel(R) Xeon(R) Silver 4114 CPU host to a 4.4 cluster
2.
3.

Actual results:
oVirt complains about missing cpu features

Expected results:
Host added to cluster

Additional info: