Log in to the KVM Cockpit web console as custadm in the following format: https://<IP address or FQDN of KVM host>:9090.
For administration actions, on the top-right of the window, click on the Limited access button.
Figure : 1. Limited access button
Note:
You require administrator access in order to view virtual machines. Administrator access is like root access. Ensure that you take care making updates.
In the Switch to administrative access window, enter the password for custadm.
Figure : 2. Switch to administrative access
The Limited access button on the top-right of the window changes to Administrative access.
Figure : 3. Administrative access button
Navigate to System > Virtual Machines.
If the virtual machine is running, right-click on the virtual machine to update and select Shut Down.
Right-click on the virtual machine and choose Open/Edit, and go to Overivew section.
KVM Cockpit displays the CPU details window.
Update the CPU reservation details such as vCPU maximum, vCPU count, Sockets, Core per socket, and Threads per core.