Go for it! On Mon, Feb 20, 2017 at 11:43 AM, Paolo Bonzini <pbonzini@xxxxxxxxxx> wrote: > I spent some time collecting vmxcap output for various Intel processors. > I tested Prescott (Cedar Mill actually), Yonah (32-bit only) and every > microarchitecture from Conroe to Haswell. As far as I can tell, these > are all Intel processors that supported virtualization. My notes are > attached. > > The only ones without virtual NMI and NMI-window exiting were the Cedar > Mill and Yonah. One is a Pentium 4 microarchitecture that one should > use as a toaster rather than as a hypervisor; the other is not even > 64-bit capable. It also has VMCS restricted to 32 bit addresses, so if > it ever had >3.5GB memory installed KVM would break. > > Based on this, I'd like to drop the code that emulates the NMI window > and just require these two features in KVM 4.11+. > > Any objections? > > Paolo
