8:28 p.m.
Hi,
I've been using my core i5 6500 (skylake-client) for some time now to test
oVirt on my machine.
However this is no longer the case.
I am using Fedora 32 as my base system with nested-kvm enabled, when I try
to install oVirt 4.4 as HCI single node, I get an error in the last phase
which consists of copying the VM-Manager to the engine volume and boot it.
It is the boot that causes the problem, I get an error about the CPU :
*the CPU is incompatible with host CPU: Host CPU does not provide required
features: mpx*
*This is the CPU part from virsh domcapabilities on my physical machine*
<cpu>
<mode name='host-passthrough' supported='yes'/>
<mode name='host-model' supported='yes'>
*<model fallback='forbid'>Skylake-Client-IBRS</model> *
<vendor>Intel</vendor>
<feature policy='require' name='ss'/>
<feature policy='require' name='vmx'/>
<feature policy='require' name='pdcm'/>
<feature policy='require' name='hypervisor'/>
<feature policy='require' name='tsc_adjust'/>
<feature policy='require' name='clflushopt'/>
<feature policy='require' name='umip'/>
<feature policy='require' name='md-clear'/>
<feature policy='require' name='stibp'/>
<feature policy='require' name='arch-capabilities'/>
<feature policy='require' name='ssbd'/>
<feature policy='require' name='xsaves'/>
<feature policy='require' name='pdpe1gb'/>
<feature policy='require' name='invtsc'/>
<feature policy='require' name='ibpb'/>
<feature policy='require' name='amd-ssbd'/>
<feature policy='require' name='skip-l1dfl-vmentry'/>
</mode>
<mode name='custom' supported='yes'>
<model usable='yes'>qemu64</model>
<model usable='yes'>qemu32</model>
<model usable='no'>phenom</model>
<model usable='yes'>pentium3</model>
<model usable='yes'>pentium2</model>
<model usable='yes'>pentium</model>
<model usable='yes'>n270</model>
<model usable='yes'>kvm64</model>
<model usable='yes'>kvm32</model>
<model usable='yes'>coreduo</model>
<model usable='yes'>core2duo</model>
<model usable='no'>athlon</model>
<model usable='yes'>Westmere-IBRS</model>
<model usable='yes'>Westmere</model>
<model usable='no'>Skylake-Server-IBRS</model>
<model usable='no'>Skylake-Server</model>
<model usable='yes'>Skylake-Client-IBRS</model>
<model usable='yes'>Skylake-Client</model>
<model usable='yes'>SandyBridge-IBRS</model>
<model usable='yes'>SandyBridge</model>
<model usable='yes'>Penryn</model>
<model usable='no'>Opteron_G5</model>
<model usable='no'>Opteron_G4</model>
<model usable='no'>Opteron_G3</model>
<model usable='yes'>Opteron_G2</model>
<model usable='yes'>Opteron_G1</model>
<model usable='yes'>Nehalem-IBRS</model>
<model usable='yes'>Nehalem</model>
<model usable='yes'>IvyBridge-IBRS</model>
<model usable='yes'>IvyBridge</model>
<model usable='no'>Icelake-Server</model>
<model usable='no'>Icelake-Client</model>
<model usable='yes'>Haswell-noTSX-IBRS</model>
<model usable='yes'>Haswell-noTSX</model>
<model usable='yes'>Haswell-IBRS</model>
<model usable='yes'>Haswell</model>
<model usable='no'>EPYC-IBPB</model>
<model usable='no'>EPYC</model>
<model usable='no'>Dhyana</model>
<model usable='yes'>Conroe</model>
<model usable='no'>Cascadelake-Server</model>
<model usable='yes'>Broadwell-noTSX-IBRS</model>
<model usable='yes'>Broadwell-noTSX</model>
<model usable='yes'>Broadwell-IBRS</model>
<model usable='yes'>Broadwell</model>
<model usable='yes'>486</model>
</mode>
</cpu>
*Here is the lscpu of my physical machine*
# lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
Address sizes: 39 bits physical, 48 bits virtual
CPU(s): 4
On-line CPU(s) list: 0-3
Thread(s) per core: 1
Core(s) per socket: 4
Socket(s): 1
NUMA node(s): 1
Vendor ID: GenuineIntel
CPU family: 6
Model: 94
Model name: Intel(R) Core(TM) i5-6500 CPU @ 3.20GHz
Stepping: 3
CPU MHz: 954.588
CPU max MHz: 3600.0000
CPU min MHz: 800.0000
BogoMIPS: 6399.96
Virtualization: VT-x
L1d cache: 128 KiB
L1i cache: 128 KiB
L2 cache: 1 MiB
L3 cache: 6 MiB
NUMA node0 CPU(s): 0-3
Vulnerability Itlb multihit: KVM: Mitigation: Split huge pages
Vulnerability L1tf: Mitigation; PTE Inversion; VMX conditional
cache flushes, SMT disabled
Vulnerability Mds: Mitigation; Clear CPU buffers; SMT
disabled
Vulnerability Meltdown: Mitigation; PTI
Vulnerability Spec store bypass: Mitigation; Speculative Store Bypass
disabled via prctl and seccomp
Vulnerability Spectre v1: Mitigation; usercopy/swapgs barriers and
__user pointer sanitization
Vulnerability Spectre v2: Mitigation; Full generic retpoline, IBPB
conditional, IBRS_FW, STIBP disabled, RSB filling
Vulnerability Srbds: Vulnerable: No microcode
Vulnerability Tsx async abort: Mitigation; Clear CPU buffers; SMT
disabled
Flags: fpu vme de pse tsc msr pae mce cx8 apic
sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm
pbe syscall nx pdpe1gb rdtscp lm constan
t_tsc art arch_perfmon pebs bts rep_good
nopl xtopology nonstop_tsc cpuid aperfmperf pni pclmulqdq dtes64 monitor
ds_cpl vmx smx est tm2 ssse3 sdbg fma cx16
xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe
popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm
3dnowprefetch cpuid_fault invpcid_single pti ssbd
ibrs ibpb stibp tpr_shadow vnmi
flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2
erms invpcid rtm *mpx* rdseed adx smap clflushopt in
tel_pt xsaveopt xsavec xgetbv1 xsaves
dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp md_clear
flush_l1d
*Here is the CPU part from virsh dumpxml of my ovirt hypervisor*
<cpu mode='custom' match='exact' check='full'>
<model fallback='forbid'>Skylake-Client-IBRS</model>
<vendor>Intel</vendor>
<feature policy='require' name='ss'/>
<feature policy='require' name='vmx'/>
<feature policy='require' name='pdcm'/>
<feature policy='require' name='hypervisor'/>
<feature policy='require' name='tsc_adjust'/>
<feature policy='require' name='clflushopt'/>
<feature policy='require' name='umip'/>
<feature policy='require' name='md-clear'/>
<feature policy='require' name='stibp'/>
<feature policy='require' name='arch-capabilities'/>
<feature policy='require' name='ssbd'/>
<feature policy='require' name='xsaves'/>
<feature policy='require' name='pdpe1gb'/>
<feature policy='require' name='ibpb'/>
<feature policy='require' name='amd-ssbd'/>
<feature policy='require' name='skip-l1dfl-vmentry'/>
<feature policy='disable' name='mpx'/>
</cpu>
*Here is the lcpu of my ovirt hypervisor*
[root@node1 ~]# lscpu
Architecture : x86_64
Mode(s) opératoire(s) des processeurs : 32-bit, 64-bit
Boutisme : Little Endian
Processeur(s) : 4
Liste de processeur(s) en ligne : 0-3
Thread(s) par cœur : 1
Cœur(s) par socket : 1
Socket(s) : 4
Nœud(s) NUMA : 1
Identifiant constructeur : GenuineIntel
Famille de processeur : 6
Modèle : 94
Nom de modèle : Intel Core Processor (Skylake,
IBRS)
Révision : 3
Vitesse du processeur en MHz : 3191.998
BogoMIPS : 6383.99
Virtualisation : VT-x
Constructeur d'hyperviseur : KVM
Type de virtualisation : complet
Cache L1d : 32K
Cache L1i : 32K
Cache L2 : 4096K
Cache L3 : 16384K
Nœud NUMA 0 de processeur(s) : 0-3
Drapaux : fpu vme de pse tsc msr pae mce cx8
apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss syscall
nx pdpe1gb rdtscp lm constant_tsc rep_go
od nopl xtopology cpuid tsc_known_freq pni pclmulqdq vmx ssse3 fma cx16
pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave
avx f16c rdrand hypervisor lahf_lm abm 3dnow
prefetch cpuid_fault invpcid_single pti ssbd ibrs ibpb stibp tpr_shadow
vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms
invpcid rtm rdseed adx smap clflushopt xs
aveopt xsavec xgetbv1 xsaves arat umip md_clear arch_capabilities
it seems not all the flags are presented to the hypervisor especially the
mpx which causes the error
Is there a workaround for this?
Regards.