[arch-general] Why qemu/kqemu conflict to kvm ?

OK, ok, I want install qemu+kqemu and KVM in my machine. Why does they conflict? Sometime, I want my virtual machine run faster, so KVM is a great choice. But sometime, I need simulate other CPU: ppc arm ... , so qemu is the best choice. Why does them conflict? Can the community do some works to let them co-exist in the SAME archlinux installation?