hi , yes there is Libvirt verison are not same as you pointed between Host (2.0)and Guest (old version 1.2).
Not sure if this can fix the issue .Guest image is pre -compiled image ,let me try if i can update the libvirt . Else i feel In practice it seems Guest CPU cannot simulate non supported features by Host CPU Model . thanks On Tue, Jan 31, 2017 at 2:43 AM, Martin Kletzander <mklet...@redhat.com> wrote: > On Sat, Jan 28, 2017 at 09:29:11PM +0530, akhilesh rawat wrote: > >> Hi , >> >> Created new thread . >> >> >> Environment: >> Bare Metal server + CentOs with qemu/KVM +libvirt for virtualization >> Guest Instantiated with virt-install with forced CPU model like below >> virt-install --virt-type kvm --name compute-0 --cpu >> Haswell,+fma,+movbe,+fsgsbase,+bmi1,+hle,+avx2,+smep,+bmi2,+ >> erms,+invpcid,+rtm >> --ram=61440 --vcpus=20 --os-type=linux --os-variant=generic >> >> After guest installation /proc/cpuinfo show model name as Haswell . >> However Libvirt virsh capabilities show CPU configuration as "SandyBridge >> . >> " >> >> > You are running the 'virsh capablities' in the guest as well, right? > > Make sure you have same versions of libvirt in the guest and the host > so that they have the same CPU specifications > > > 1. Could I get explanation of the why inconsistency . >> >> 2. Is this expected behaviour >> >> 3. Why libvirt does not show same CPU Model as /proc/cpuinfo for CPU Model >> info. >> >> My Aim : Nested Virtualization and Nested Guest needs CPU model as Haswell >> strictly . >> >> 4. IS it possible alternative to succeed in my aim ? >> >> Thanks a lot for support. ! >> >> >> >> Guest CPU config: >> processor : 19 >> vendor_id : GenuineIntel >> cpu family : 6 >> model : 60 >> model name : Intel Core Processor (Haswell) >> stepping : 1 >> microcode : 0x1 >> cpu MHz : 1995.144 >> cache size : 4096 KB >> fpu : yes >> fpu_exception : yes >> cpuid level : 13 >> wp : yes >> flags : fpu de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov >> pat pse36 clflush mmx fxsr sse sse2 syscall nx rdtscp lm constant_tsc >> rep_good nopl eagerfpu pni pclmulqdq ssse3 cx16 pcid sse4_1 sse4_2 x2apic >> popcnt tsc_deadline_timer aes xsave avx hypervisor lahf_lm xsaveopt >> bogomips : 4105.33 >> clflush size : 64 >> cache_alignment : 64 >> address sizes : 46 bits physical, 48 bits virtual >> power management: >> >> <capabilities> >> >> <host> >> <uuid>95c4e625-3383-4ec1-9ee4-c47a87d93b97</uuid> >> <cpu> >> <arch>x86_64</arch> >> <model>SandyBridge</model> >> <vendor>Intel</vendor> >> <topology sockets='20' cores='1' threads='1'/> >> <feature name='hypervisor'/> >> <feature name='osxsave'/> >> <feature name='pcid'/> >> <pages unit='KiB' size='4'/> >> <pages unit='KiB' size='2048'/> >> >> >> >> >> Host CPU config: >> processor : 23 >> vendor_id : GenuineIntel >> cpu family : 6 >> model : 45 >> model name : Intel(R) Xeon(R) CPU E5-2620 0 @ 2.00GHz >> stepping : 7 >> microcode : 0x710 >> cpu MHz : 1200.000 >> cache size : 15360 KB >> physical id : 1 >> siblings : 12 >> core id : 5 >> cpu cores : 6 >> apicid : 43 >> initial apicid : 43 >> fpu : yes >> fpu_exception : yes >> cpuid level : 13 >> wp : yes >> 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 constant_tsc arch_perfmon pebs bts rep_good nopl >> xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor >> ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic >> popcnt tsc_deadline_timer aes xsave avx lahf_lm ida arat epb pln pts >> dtherm >> tpr_shadow vnmi flexpriority ept vpid xsaveopt >> bogomips : 4004.01 >> clflush size : 64 >> cache_alignment : 64 >> address sizes : 46 bits physical, 48 bits virtual >> power management: >> >> >> >> >> >> Br Aki >> > > _______________________________________________ >> libvirt-users mailing list >> libvirt-users@redhat.com >> https://www.redhat.com/mailman/listinfo/libvirt-users >> >
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