I have updated to version 7.3 with kernel 5.15 and I am still getting this error repeating in syslog.
Jan 15 17:40:21 rx300s7-1-pve kernel: [11464.313352] kvm [2210]: vcpu0, guest rIP: 0xfffff803397fa712 vmx_set_msr: BTF|LBR in IA32_DEBUGCTLMSR 0x1, nop
It is the same win 10 guest with cpu set...