[SOLVED] Change vendor_id into /proc/cpuinfo for VM

[nik-weter]

Hello.
I created post on reddit, but...

I have some application, it binds license to cpu and other parametrs of PC.

Recently I added new server to Proxmox cluster with AMD Epyc cpu. Other hosts have Intel cpus.

Now, when VM migrate from AMD to Intel, after reboot VM it loses app license. I should restore license via servise. For migration from Intel to AMD the same situation.

Ther are vendor_id: AuthenticAMD and model name: Common KVM processor (i set kvm64 cpu for VM) for AMD and vendor_id: GenuineIntel and model name: Common KVM processor for Intel.

I can change model name chusing different cpu for vm, but what about vendor_i?

Documentation says about /etc/pve/virtual-guest/cpu-models.conf, but hv-vendor-id there change nothing.

Any ideas how change vendor_id?

 

[Matthias.]

Setting hidden=1 or disabling kvm should work. kvm: 0

 

[nik-weter]

cpu-model: start flags +fpu;+vme;+de;+pse;+tsc;+msr;+pae;+mce;+cx8;+apic;+sep;+mtrr;+pge;+mca;+cmov;+pat;+pse36;+clflush;+mmx;+sse;+sse2;+syscall;+nx;+pdpe1gb;+rdtscp;+lm;+pni;+pclmulqdq;+ssse3;+f;+cx16;+pcid;+sse4_1;+sse4_2;+movbe;+popcnt;+aes;+xsave;+avx;+f16c;+rdrand;+lahf_lm;+abm;+3dnowprefetch;+ssbd;+ibpb;+stibp;+fsgsbase;+bmi1;+avx2;+smep;+bmi2;+erms;+rdseed;+adx;+smap;+flushopt;+clwb;+xgetbv1;+xsaves;+arat;-kvm_pv_unhalt;-mmxext;-fxsr-opt;-cr8legacy;-sse4a;-misalignsse;-osvw phys-bits 39 hidden 1 hv-vendor-id start reported-model kvm
This is models.
processor : 3 vendor_id : GenuineIntel cpu family : 15 model : 6 model name : Common KVM processor stepping : 1 microcode : 0x1 cpu MHz : 3192.628 cache size : 16384 KB physical id : 0 siblings : 4 core id : 3 cpu cores : 4 apicid : 3 initial apicid : 3 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 mmx fxsr sse sse2 ht syscall nx pdpe1gb rdtscp lm constant_tsc nopl xtopology cpuid pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch cpuid_fault pti ssbd ibpb stibp fsgsbase bmi1 avx2 smep bmi2 erms rdseed adx smap clflushopt clwb xgetbv1 xsaves arat bugs : cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs itlb_multihit bogomips : 6385.25 clflush size : 64 cache_alignment : 128 address sizes : 39 bits physical, 48 bits virtual power management
This is cpuinfo.
Disable kvm - loose performance.

 

[nik-weter]

I found solition.
I added in vm config
etc/pve/nodes/cluster-3/qemu-server/101.conf this line:

args: -cpu 'kvm64,vendor=GenuineIntel'

Now vm always have vendor_id : GenuineIntel even on AMD host

 

[Matthias.]

Great! Glad you could find the solution.
Please mark the thread as solved (edit it, there's a dropdown near the title) so others with the same problem can find it more easily.