For new features, I recently updated qemu-kvm 1.5.3 to qemu 2.5.0, but I saw several qemu binaries,
/usr/local/bin/qemu-system-x86_64. It seems
qemu-system-x86_64 is the emulator program, since libvirt won't recognize
qemu-x86_64. Then what's qemu-x86_64 for?
And according to this qemu doc:
qemu-kvm fork for x86 (deprecated, use upstream QEMU now)
It seems qemu is replacing qemu-kvm. But if qemu not qemu-kvm is used, is the guest CPU still provided by KVM? If not so, will the performance be worse?