Selecting CPU Type x86-64-v2-AES

[stuartbh]

ProxMox users, developers, et alia:

It seems that if one selects the CPU type of "x86-64-v2-AES" it does not allow nested virtualization. Is there a way to custom configure this CPU type such that it will allow that functionality?

Stuart

 

[Moayad]

Hi,

Using `Host` type allows nested virtualization.

 

[stuartbh]

Moayad,

Well, yes I understand what the host type does. I was trying to understand how and with what level of pain I could add the nested virtualization flag to the particular CPU type I was looking at. Are you suggesting that there is no way to do that?

Thanks for your reply.


Stuart

 

[fiona]

Hi,
what you can try is creating an entry with +svm for AMD or +vmx for Intel in /etc/pve/virtual-guest/cpu-models.conf (based on the original definition):

cpu-model: x86-64-v2-AES-nested
   flags +aes;+popcnt;+pni;+sse4.1;+sse4.2;+ssse3;+svm
   reported-model qemu64

Afterwards you can select the new custom model via UI like any other. But this might not work (it didn't for me) and you might need to choose a model more closely matching your CPU as a base. The following worked for me:

cpu-model: EPYC-nested
   flags +svm
   reported-model EPYC

Please also note that we do not test such configurations and there might be issues with live-migration!