On 29.04.2012, at 12:48, Nadav Har'El wrote: > On Sun, Apr 29, 2012, Steven wrote about "is it possible to run KVM module > inside a qemu VM": >> Hi, >> I know there exists nested KVM in the kernel tree such that a KVM >> hypervisor can run inside a guest. >> Now I am wondering if it is possible to load the kvm module in a qemu >> VM (-no-kvm). So I started a qemu VM using the following command > > No, I believe this is NOT possible. > > KVM, as the top (L0) hypervisor, implements the VMX instructions for the > L1 guest using the hosts' VMX. Qemu, on the other hand, does not have VMX > emulation at all. > > Note that before you set out to add VMX instructions emulation, you need > to also consider the option of emulating SVM (AMD's virtualization > extensions) instead of VMX - even on Intel hosts. I believe (though I > didn't consider this too carefully) this will be easier to implement, > as in many respects, SVM is simpler than VMX.
SVM is already implemented in TCG, though the support may not be 100% compatible to real hardware ;). Alex
